/*
 * Copyright © 2012 Intel Corporation
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 * IN THE SOFTWARE.
 *
 * Authors:
 *    Eugeni Dodonov <eugeni.dodonov@intel.com>
 *
 */

#include <drm/drm_scdc_helper.h>
#include "i915_drv.h"
#include "intel_drv.h"

struct ddi_buf_trans {
        u32 trans1;     /* balance leg enable, de-emph level */
        u32 trans2;     /* vref sel, vswing */
        u8 i_boost;     /* SKL: I_boost; valid: 0x0, 0x1, 0x3, 0x7 */
};

static const u8 index_to_dp_signal_levels[] = {
        [0] = DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_0,
        [1] = DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_1,
        [2] = DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_2,
        [3] = DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_3,
        [4] = DP_TRAIN_VOLTAGE_SWING_LEVEL_1 | DP_TRAIN_PRE_EMPH_LEVEL_0,
        [5] = DP_TRAIN_VOLTAGE_SWING_LEVEL_1 | DP_TRAIN_PRE_EMPH_LEVEL_1,
        [6] = DP_TRAIN_VOLTAGE_SWING_LEVEL_1 | DP_TRAIN_PRE_EMPH_LEVEL_2,
        [7] = DP_TRAIN_VOLTAGE_SWING_LEVEL_2 | DP_TRAIN_PRE_EMPH_LEVEL_0,
        [8] = DP_TRAIN_VOLTAGE_SWING_LEVEL_2 | DP_TRAIN_PRE_EMPH_LEVEL_1,
        [9] = DP_TRAIN_VOLTAGE_SWING_LEVEL_3 | DP_TRAIN_PRE_EMPH_LEVEL_0,
};

/* HDMI/DVI modes ignore everything but the last 2 items. So we share
 * them for both DP and FDI transports, allowing those ports to
 * automatically adapt to HDMI connections as well
 */
static const struct ddi_buf_trans hsw_ddi_translations_dp[] = {
        { 0x00FFFFFF, 0x0006000E, 0x0 },
        { 0x00D75FFF, 0x0005000A, 0x0 },
        { 0x00C30FFF, 0x00040006, 0x0 },
        { 0x80AAAFFF, 0x000B0000, 0x0 },
        { 0x00FFFFFF, 0x0005000A, 0x0 },
        { 0x00D75FFF, 0x000C0004, 0x0 },
        { 0x80C30FFF, 0x000B0000, 0x0 },
        { 0x00FFFFFF, 0x00040006, 0x0 },
        { 0x80D75FFF, 0x000B0000, 0x0 },
};

static const struct ddi_buf_trans hsw_ddi_translations_fdi[] = {
        { 0x00FFFFFF, 0x0007000E, 0x0 },
        { 0x00D75FFF, 0x000F000A, 0x0 },
        { 0x00C30FFF, 0x00060006, 0x0 },
        { 0x00AAAFFF, 0x001E0000, 0x0 },
        { 0x00FFFFFF, 0x000F000A, 0x0 },
        { 0x00D75FFF, 0x00160004, 0x0 },
        { 0x00C30FFF, 0x001E0000, 0x0 },
        { 0x00FFFFFF, 0x00060006, 0x0 },
        { 0x00D75FFF, 0x001E0000, 0x0 },
};

static const struct ddi_buf_trans hsw_ddi_translations_hdmi[] = {
                                        /* Idx  NT mV d T mV d  db      */
        { 0x00FFFFFF, 0x0006000E, 0x0 },/* 0:   400     400     0       */
        { 0x00E79FFF, 0x000E000C, 0x0 },/* 1:   400     500     2       */
        { 0x00D75FFF, 0x0005000A, 0x0 },/* 2:   400     600     3.5     */
        { 0x00FFFFFF, 0x0005000A, 0x0 },/* 3:   600     600     0       */
        { 0x00E79FFF, 0x001D0007, 0x0 },/* 4:   600     750     2       */
        { 0x00D75FFF, 0x000C0004, 0x0 },/* 5:   600     900     3.5     */
        { 0x00FFFFFF, 0x00040006, 0x0 },/* 6:   800     800     0       */
        { 0x80E79FFF, 0x00030002, 0x0 },/* 7:   800     1000    2       */
        { 0x00FFFFFF, 0x00140005, 0x0 },/* 8:   850     850     0       */
        { 0x00FFFFFF, 0x000C0004, 0x0 },/* 9:   900     900     0       */
        { 0x00FFFFFF, 0x001C0003, 0x0 },/* 10:  950     950     0       */
        { 0x80FFFFFF, 0x00030002, 0x0 },/* 11:  1000    1000    0       */
};

static const struct ddi_buf_trans bdw_ddi_translations_edp[] = {
        { 0x00FFFFFF, 0x00000012, 0x0 },
        { 0x00EBAFFF, 0x00020011, 0x0 },
        { 0x00C71FFF, 0x0006000F, 0x0 },
        { 0x00AAAFFF, 0x000E000A, 0x0 },
        { 0x00FFFFFF, 0x00020011, 0x0 },
        { 0x00DB6FFF, 0x0005000F, 0x0 },
        { 0x00BEEFFF, 0x000A000C, 0x0 },
        { 0x00FFFFFF, 0x0005000F, 0x0 },
        { 0x00DB6FFF, 0x000A000C, 0x0 },
};

static const struct ddi_buf_trans bdw_ddi_translations_dp[] = {
        { 0x00FFFFFF, 0x0007000E, 0x0 },
        { 0x00D75FFF, 0x000E000A, 0x0 },
        { 0x00BEFFFF, 0x00140006, 0x0 },
        { 0x80B2CFFF, 0x001B0002, 0x0 },
        { 0x00FFFFFF, 0x000E000A, 0x0 },
        { 0x00DB6FFF, 0x00160005, 0x0 },
        { 0x80C71FFF, 0x001A0002, 0x0 },
        { 0x00F7DFFF, 0x00180004, 0x0 },
        { 0x80D75FFF, 0x001B0002, 0x0 },
};

static const struct ddi_buf_trans bdw_ddi_translations_fdi[] = {
        { 0x00FFFFFF, 0x0001000E, 0x0 },
        { 0x00D75FFF, 0x0004000A, 0x0 },
        { 0x00C30FFF, 0x00070006, 0x0 },
        { 0x00AAAFFF, 0x000C0000, 0x0 },
        { 0x00FFFFFF, 0x0004000A, 0x0 },
        { 0x00D75FFF, 0x00090004, 0x0 },
        { 0x00C30FFF, 0x000C0000, 0x0 },
        { 0x00FFFFFF, 0x00070006, 0x0 },
        { 0x00D75FFF, 0x000C0000, 0x0 },
};

static const struct ddi_buf_trans bdw_ddi_translations_hdmi[] = {
                                        /* Idx  NT mV d T mV df db      */
        { 0x00FFFFFF, 0x0007000E, 0x0 },/* 0:   400     400     0       */
        { 0x00D75FFF, 0x000E000A, 0x0 },/* 1:   400     600     3.5     */
        { 0x00BEFFFF, 0x00140006, 0x0 },/* 2:   400     800     6       */
        { 0x00FFFFFF, 0x0009000D, 0x0 },/* 3:   450     450     0       */
        { 0x00FFFFFF, 0x000E000A, 0x0 },/* 4:   600     600     0       */
        { 0x00D7FFFF, 0x00140006, 0x0 },/* 5:   600     800     2.5     */
        { 0x80CB2FFF, 0x001B0002, 0x0 },/* 6:   600     1000    4.5     */
        { 0x00FFFFFF, 0x00140006, 0x0 },/* 7:   800     800     0       */
        { 0x80E79FFF, 0x001B0002, 0x0 },/* 8:   800     1000    2       */
        { 0x80FFFFFF, 0x001B0002, 0x0 },/* 9:   1000    1000    0       */
};

/* Skylake H and S */
static const struct ddi_buf_trans skl_ddi_translations_dp[] = {
        { 0x00002016, 0x000000A0, 0x0 },
        { 0x00005012, 0x0000009B, 0x0 },
        { 0x00007011, 0x00000088, 0x0 },
        { 0x80009010, 0x000000C0, 0x1 },
        { 0x00002016, 0x0000009B, 0x0 },
        { 0x00005012, 0x00000088, 0x0 },
        { 0x80007011, 0x000000C0, 0x1 },
        { 0x00002016, 0x000000DF, 0x0 },
        { 0x80005012, 0x000000C0, 0x1 },
};

/* Skylake U */
static const struct ddi_buf_trans skl_u_ddi_translations_dp[] = {
        { 0x0000201B, 0x000000A2, 0x0 },
        { 0x00005012, 0x00000088, 0x0 },
        { 0x80007011, 0x000000CD, 0x1 },
        { 0x80009010, 0x000000C0, 0x1 },
        { 0x0000201B, 0x0000009D, 0x0 },
        { 0x80005012, 0x000000C0, 0x1 },
        { 0x80007011, 0x000000C0, 0x1 },
        { 0x00002016, 0x00000088, 0x0 },
        { 0x80005012, 0x000000C0, 0x1 },
};

/* Skylake Y */
static const struct ddi_buf_trans skl_y_ddi_translations_dp[] = {
        { 0x00000018, 0x000000A2, 0x0 },
        { 0x00005012, 0x00000088, 0x0 },
        { 0x80007011, 0x000000CD, 0x3 },
        { 0x80009010, 0x000000C0, 0x3 },
        { 0x00000018, 0x0000009D, 0x0 },
        { 0x80005012, 0x000000C0, 0x3 },
        { 0x80007011, 0x000000C0, 0x3 },
        { 0x00000018, 0x00000088, 0x0 },
        { 0x80005012, 0x000000C0, 0x3 },
};

/* Kabylake H and S */
static const struct ddi_buf_trans kbl_ddi_translations_dp[] = {
        { 0x00002016, 0x000000A0, 0x0 },
        { 0x00005012, 0x0000009B, 0x0 },
        { 0x00007011, 0x00000088, 0x0 },
        { 0x80009010, 0x000000C0, 0x1 },
        { 0x00002016, 0x0000009B, 0x0 },
        { 0x00005012, 0x00000088, 0x0 },
        { 0x80007011, 0x000000C0, 0x1 },
        { 0x00002016, 0x00000097, 0x0 },
        { 0x80005012, 0x000000C0, 0x1 },
};

/* Kabylake U */
static const struct ddi_buf_trans kbl_u_ddi_translations_dp[] = {
        { 0x0000201B, 0x000000A1, 0x0 },
        { 0x00005012, 0x00000088, 0x0 },
        { 0x80007011, 0x000000CD, 0x3 },
        { 0x80009010, 0x000000C0, 0x3 },
        { 0x0000201B, 0x0000009D, 0x0 },
        { 0x80005012, 0x000000C0, 0x3 },
        { 0x80007011, 0x000000C0, 0x3 },
        { 0x00002016, 0x0000004F, 0x0 },
        { 0x80005012, 0x000000C0, 0x3 },
};

/* Kabylake Y */
static const struct ddi_buf_trans kbl_y_ddi_translations_dp[] = {
        { 0x00001017, 0x000000A1, 0x0 },
        { 0x00005012, 0x00000088, 0x0 },
        { 0x80007011, 0x000000CD, 0x3 },
        { 0x8000800F, 0x000000C0, 0x3 },
        { 0x00001017, 0x0000009D, 0x0 },
        { 0x80005012, 0x000000C0, 0x3 },
        { 0x80007011, 0x000000C0, 0x3 },
        { 0x00001017, 0x0000004C, 0x0 },
        { 0x80005012, 0x000000C0, 0x3 },
};

/*
 * Skylake/Kabylake H and S
 * eDP 1.4 low vswing translation parameters
 */
static const struct ddi_buf_trans skl_ddi_translations_edp[] = {
        { 0x00000018, 0x000000A8, 0x0 },
        { 0x00004013, 0x000000A9, 0x0 },
        { 0x00007011, 0x000000A2, 0x0 },
        { 0x00009010, 0x0000009C, 0x0 },
        { 0x00000018, 0x000000A9, 0x0 },
        { 0x00006013, 0x000000A2, 0x0 },
        { 0x00007011, 0x000000A6, 0x0 },
        { 0x00000018, 0x000000AB, 0x0 },
        { 0x00007013, 0x0000009F, 0x0 },
        { 0x00000018, 0x000000DF, 0x0 },
};

/*
 * Skylake/Kabylake U
 * eDP 1.4 low vswing translation parameters
 */
static const struct ddi_buf_trans skl_u_ddi_translations_edp[] = {
        { 0x00000018, 0x000000A8, 0x0 },
        { 0x00004013, 0x000000A9, 0x0 },
        { 0x00007011, 0x000000A2, 0x0 },
        { 0x00009010, 0x0000009C, 0x0 },
        { 0x00000018, 0x000000A9, 0x0 },
        { 0x00006013, 0x000000A2, 0x0 },
        { 0x00007011, 0x000000A6, 0x0 },
        { 0x00002016, 0x000000AB, 0x0 },
        { 0x00005013, 0x0000009F, 0x0 },
        { 0x00000018, 0x000000DF, 0x0 },
};

/*
 * Skylake/Kabylake Y
 * eDP 1.4 low vswing translation parameters
 */
static const struct ddi_buf_trans skl_y_ddi_translations_edp[] = {
        { 0x00000018, 0x000000A8, 0x0 },
        { 0x00004013, 0x000000AB, 0x0 },
        { 0x00007011, 0x000000A4, 0x0 },
        { 0x00009010, 0x000000DF, 0x0 },
        { 0x00000018, 0x000000AA, 0x0 },
        { 0x00006013, 0x000000A4, 0x0 },
        { 0x00007011, 0x0000009D, 0x0 },
        { 0x00000018, 0x000000A0, 0x0 },
        { 0x00006012, 0x000000DF, 0x0 },
        { 0x00000018, 0x0000008A, 0x0 },
};

/* Skylake/Kabylake U, H and S */
static const struct ddi_buf_trans skl_ddi_translations_hdmi[] = {
        { 0x00000018, 0x000000AC, 0x0 },
        { 0x00005012, 0x0000009D, 0x0 },
        { 0x00007011, 0x00000088, 0x0 },
        { 0x00000018, 0x000000A1, 0x0 },
        { 0x00000018, 0x00000098, 0x0 },
        { 0x00004013, 0x00000088, 0x0 },
        { 0x80006012, 0x000000CD, 0x1 },
        { 0x00000018, 0x000000DF, 0x0 },
        { 0x80003015, 0x000000CD, 0x1 },        /* Default */
        { 0x80003015, 0x000000C0, 0x1 },
        { 0x80000018, 0x000000C0, 0x1 },
};

/* Skylake/Kabylake Y */
static const struct ddi_buf_trans skl_y_ddi_translations_hdmi[] = {
        { 0x00000018, 0x000000A1, 0x0 },
        { 0x00005012, 0x000000DF, 0x0 },
        { 0x80007011, 0x000000CB, 0x3 },
        { 0x00000018, 0x000000A4, 0x0 },
        { 0x00000018, 0x0000009D, 0x0 },
        { 0x00004013, 0x00000080, 0x0 },
        { 0x80006013, 0x000000C0, 0x3 },
        { 0x00000018, 0x0000008A, 0x0 },
        { 0x80003015, 0x000000C0, 0x3 },        /* Default */
        { 0x80003015, 0x000000C0, 0x3 },
        { 0x80000018, 0x000000C0, 0x3 },
};

struct bxt_ddi_buf_trans {
        u8 margin;      /* swing value */
        u8 scale;       /* scale value */
        u8 enable;      /* scale enable */
        u8 deemphasis;
};

static const struct bxt_ddi_buf_trans bxt_ddi_translations_dp[] = {
                                        /* Idx  NT mV diff      db  */
        { 52,  0x9A, 0, 128, }, /* 0:   400             0   */
        { 78,  0x9A, 0, 85,  }, /* 1:   400             3.5 */
        { 104, 0x9A, 0, 64,  }, /* 2:   400             6   */
        { 154, 0x9A, 0, 43,  }, /* 3:   400             9.5 */
        { 77,  0x9A, 0, 128, }, /* 4:   600             0   */
        { 116, 0x9A, 0, 85,  }, /* 5:   600             3.5 */
        { 154, 0x9A, 0, 64,  }, /* 6:   600             6   */
        { 102, 0x9A, 0, 128, }, /* 7:   800             0   */
        { 154, 0x9A, 0, 85,  }, /* 8:   800             3.5 */
        { 154, 0x9A, 1, 128, }, /* 9:   1200            0   */
};

static const struct bxt_ddi_buf_trans bxt_ddi_translations_edp[] = {
                                        /* Idx  NT mV diff      db  */
        { 26, 0, 0, 128, },     /* 0:   200             0   */
        { 38, 0, 0, 112, },     /* 1:   200             1.5 */
        { 48, 0, 0, 96,  },     /* 2:   200             4   */
        { 54, 0, 0, 69,  },     /* 3:   200             6   */
        { 32, 0, 0, 128, },     /* 4:   250             0   */
        { 48, 0, 0, 104, },     /* 5:   250             1.5 */
        { 54, 0, 0, 85,  },     /* 6:   250             4   */
        { 43, 0, 0, 128, },     /* 7:   300             0   */
        { 54, 0, 0, 101, },     /* 8:   300             1.5 */
        { 48, 0, 0, 128, },     /* 9:   300             0   */
};

/* BSpec has 2 recommended values - entries 0 and 8.
 * Using the entry with higher vswing.
 */
static const struct bxt_ddi_buf_trans bxt_ddi_translations_hdmi[] = {
                                        /* Idx  NT mV diff      db  */
        { 52,  0x9A, 0, 128, }, /* 0:   400             0   */
        { 52,  0x9A, 0, 85,  }, /* 1:   400             3.5 */
        { 52,  0x9A, 0, 64,  }, /* 2:   400             6   */
        { 42,  0x9A, 0, 43,  }, /* 3:   400             9.5 */
        { 77,  0x9A, 0, 128, }, /* 4:   600             0   */
        { 77,  0x9A, 0, 85,  }, /* 5:   600             3.5 */
        { 77,  0x9A, 0, 64,  }, /* 6:   600             6   */
        { 102, 0x9A, 0, 128, }, /* 7:   800             0   */
        { 102, 0x9A, 0, 85,  }, /* 8:   800             3.5 */
        { 154, 0x9A, 1, 128, }, /* 9:   1200            0   */
};

struct cnl_ddi_buf_trans {
        u8 dw2_swing_sel;
        u8 dw7_n_scalar;
        u8 dw4_cursor_coeff;
        u8 dw4_post_cursor_2;
        u8 dw4_post_cursor_1;
};

/* Voltage Swing Programming for VccIO 0.85V for DP */
static const struct cnl_ddi_buf_trans cnl_ddi_translations_dp_0_85V[] = {
                                                /* NT mV Trans mV db    */
        { 0xA, 0x5D, 0x3F, 0x00, 0x00 },        /* 350   350      0.0   */
        { 0xA, 0x6A, 0x38, 0x00, 0x07 },        /* 350   500      3.1   */
        { 0xB, 0x7A, 0x32, 0x00, 0x0D },        /* 350   700      6.0   */
        { 0x6, 0x7C, 0x2D, 0x00, 0x12 },        /* 350   900      8.2   */
        { 0xA, 0x69, 0x3F, 0x00, 0x00 },        /* 500   500      0.0   */
        { 0xB, 0x7A, 0x36, 0x00, 0x09 },        /* 500   700      2.9   */
        { 0x6, 0x7C, 0x30, 0x00, 0x0F },        /* 500   900      5.1   */
        { 0xB, 0x7D, 0x3C, 0x00, 0x03 },        /* 650   725      0.9   */
        { 0x6, 0x7C, 0x34, 0x00, 0x0B },        /* 600   900      3.5   */
        { 0x6, 0x7B, 0x3F, 0x00, 0x00 },        /* 900   900      0.0   */
};

/* Voltage Swing Programming for VccIO 0.85V for HDMI */
static const struct cnl_ddi_buf_trans cnl_ddi_translations_hdmi_0_85V[] = {
                                                /* NT mV Trans mV db    */
        { 0xA, 0x60, 0x3F, 0x00, 0x00 },        /* 450   450      0.0   */
        { 0xB, 0x73, 0x36, 0x00, 0x09 },        /* 450   650      3.2   */
        { 0x6, 0x7F, 0x31, 0x00, 0x0E },        /* 450   850      5.5   */
        { 0xB, 0x73, 0x3F, 0x00, 0x00 },        /* 650   650      0.0   */
        { 0x6, 0x7F, 0x37, 0x00, 0x08 },        /* 650   850      2.3   */
        { 0x6, 0x7F, 0x3F, 0x00, 0x00 },        /* 850   850      0.0   */
        { 0x6, 0x7F, 0x35, 0x00, 0x0A },        /* 600   850      3.0   */
};

/* Voltage Swing Programming for VccIO 0.85V for eDP */
static const struct cnl_ddi_buf_trans cnl_ddi_translations_edp_0_85V[] = {
                                                /* NT mV Trans mV db    */
        { 0xA, 0x66, 0x3A, 0x00, 0x05 },        /* 384   500      2.3   */
        { 0x0, 0x7F, 0x38, 0x00, 0x07 },        /* 153   200      2.3   */
        { 0x8, 0x7F, 0x38, 0x00, 0x07 },        /* 192   250      2.3   */
        { 0x1, 0x7F, 0x38, 0x00, 0x07 },        /* 230   300      2.3   */
        { 0x9, 0x7F, 0x38, 0x00, 0x07 },        /* 269   350      2.3   */
        { 0xA, 0x66, 0x3C, 0x00, 0x03 },        /* 446   500      1.0   */
        { 0xB, 0x70, 0x3C, 0x00, 0x03 },        /* 460   600      2.3   */
        { 0xC, 0x75, 0x3C, 0x00, 0x03 },        /* 537   700      2.3   */
        { 0x2, 0x7F, 0x3F, 0x00, 0x00 },        /* 400   400      0.0   */
};

/* Voltage Swing Programming for VccIO 0.95V for DP */
static const struct cnl_ddi_buf_trans cnl_ddi_translations_dp_0_95V[] = {
                                                /* NT mV Trans mV db    */
        { 0xA, 0x5D, 0x3F, 0x00, 0x00 },        /* 350   350      0.0   */
        { 0xA, 0x6A, 0x38, 0x00, 0x07 },        /* 350   500      3.1   */
        { 0xB, 0x7A, 0x32, 0x00, 0x0D },        /* 350   700      6.0   */
        { 0x6, 0x7C, 0x2D, 0x00, 0x12 },        /* 350   900      8.2   */
        { 0xA, 0x69, 0x3F, 0x00, 0x00 },        /* 500   500      0.0   */
        { 0xB, 0x7A, 0x36, 0x00, 0x09 },        /* 500   700      2.9   */
        { 0x6, 0x7C, 0x30, 0x00, 0x0F },        /* 500   900      5.1   */
        { 0xB, 0x7D, 0x3C, 0x00, 0x03 },        /* 650   725      0.9   */
        { 0x6, 0x7C, 0x34, 0x00, 0x0B },        /* 600   900      3.5   */
        { 0x6, 0x7B, 0x3F, 0x00, 0x00 },        /* 900   900      0.0   */
};

/* Voltage Swing Programming for VccIO 0.95V for HDMI */
static const struct cnl_ddi_buf_trans cnl_ddi_translations_hdmi_0_95V[] = {
                                                /* NT mV Trans mV db    */
        { 0xA, 0x5C, 0x3F, 0x00, 0x00 },        /* 400   400      0.0   */
        { 0xB, 0x69, 0x37, 0x00, 0x08 },        /* 400   600      3.5   */
        { 0x5, 0x76, 0x31, 0x00, 0x0E },        /* 400   800      6.0   */
        { 0xA, 0x5E, 0x3F, 0x00, 0x00 },        /* 450   450      0.0   */
        { 0xB, 0x69, 0x3F, 0x00, 0x00 },        /* 600   600      0.0   */
        { 0xB, 0x79, 0x35, 0x00, 0x0A },        /* 600   850      3.0   */
        { 0x6, 0x7D, 0x32, 0x00, 0x0D },        /* 600   1000     4.4   */
        { 0x5, 0x76, 0x3F, 0x00, 0x00 },        /* 800   800      0.0   */
        { 0x6, 0x7D, 0x39, 0x00, 0x06 },        /* 800   1000     1.9   */
        { 0x6, 0x7F, 0x39, 0x00, 0x06 },        /* 850   1050     1.8   */
        { 0x6, 0x7F, 0x3F, 0x00, 0x00 },        /* 1050  1050     0.0   */
};

/* Voltage Swing Programming for VccIO 0.95V for eDP */
static const struct cnl_ddi_buf_trans cnl_ddi_translations_edp_0_95V[] = {
                                                /* NT mV Trans mV db    */
        { 0xA, 0x61, 0x3A, 0x00, 0x05 },        /* 384   500      2.3   */
        { 0x0, 0x7F, 0x38, 0x00, 0x07 },        /* 153   200      2.3   */
        { 0x8, 0x7F, 0x38, 0x00, 0x07 },        /* 192   250      2.3   */
        { 0x1, 0x7F, 0x38, 0x00, 0x07 },        /* 230   300      2.3   */
        { 0x9, 0x7F, 0x38, 0x00, 0x07 },        /* 269   350      2.3   */
        { 0xA, 0x61, 0x3C, 0x00, 0x03 },        /* 446   500      1.0   */
        { 0xB, 0x68, 0x39, 0x00, 0x06 },        /* 460   600      2.3   */
        { 0xC, 0x6E, 0x39, 0x00, 0x06 },        /* 537   700      2.3   */
        { 0x4, 0x7F, 0x3A, 0x00, 0x05 },        /* 460   600      2.3   */
        { 0x2, 0x7F, 0x3F, 0x00, 0x00 },        /* 400   400      0.0   */
};

/* Voltage Swing Programming for VccIO 1.05V for DP */
static const struct cnl_ddi_buf_trans cnl_ddi_translations_dp_1_05V[] = {
                                                /* NT mV Trans mV db    */
        { 0xA, 0x58, 0x3F, 0x00, 0x00 },        /* 400   400      0.0   */
        { 0xB, 0x64, 0x37, 0x00, 0x08 },        /* 400   600      3.5   */
        { 0x5, 0x70, 0x31, 0x00, 0x0E },        /* 400   800      6.0   */
        { 0x6, 0x7F, 0x2C, 0x00, 0x13 },        /* 400   1050     8.4   */
        { 0xB, 0x64, 0x3F, 0x00, 0x00 },        /* 600   600      0.0   */
        { 0x5, 0x73, 0x35, 0x00, 0x0A },        /* 600   850      3.0   */
        { 0x6, 0x7F, 0x30, 0x00, 0x0F },        /* 550   1050     5.6   */
        { 0x5, 0x76, 0x3E, 0x00, 0x01 },        /* 850   900      0.5   */
        { 0x6, 0x7F, 0x36, 0x00, 0x09 },        /* 750   1050     2.9   */
        { 0x6, 0x7F, 0x3F, 0x00, 0x00 },        /* 1050  1050     0.0   */
};

/* Voltage Swing Programming for VccIO 1.05V for HDMI */
static const struct cnl_ddi_buf_trans cnl_ddi_translations_hdmi_1_05V[] = {
                                                /* NT mV Trans mV db    */
        { 0xA, 0x58, 0x3F, 0x00, 0x00 },        /* 400   400      0.0   */
        { 0xB, 0x64, 0x37, 0x00, 0x08 },        /* 400   600      3.5   */
        { 0x5, 0x70, 0x31, 0x00, 0x0E },        /* 400   800      6.0   */
        { 0xA, 0x5B, 0x3F, 0x00, 0x00 },        /* 450   450      0.0   */
        { 0xB, 0x64, 0x3F, 0x00, 0x00 },        /* 600   600      0.0   */
        { 0x5, 0x73, 0x35, 0x00, 0x0A },        /* 600   850      3.0   */
        { 0x6, 0x7C, 0x32, 0x00, 0x0D },        /* 600   1000     4.4   */
        { 0x5, 0x70, 0x3F, 0x00, 0x00 },        /* 800   800      0.0   */
        { 0x6, 0x7C, 0x39, 0x00, 0x06 },        /* 800   1000     1.9   */
        { 0x6, 0x7F, 0x39, 0x00, 0x06 },        /* 850   1050     1.8   */
        { 0x6, 0x7F, 0x3F, 0x00, 0x00 },        /* 1050  1050     0.0   */
};

/* Voltage Swing Programming for VccIO 1.05V for eDP */
static const struct cnl_ddi_buf_trans cnl_ddi_translations_edp_1_05V[] = {
                                                /* NT mV Trans mV db    */
        { 0xA, 0x5E, 0x3A, 0x00, 0x05 },        /* 384   500      2.3   */
        { 0x0, 0x7F, 0x38, 0x00, 0x07 },        /* 153   200      2.3   */
        { 0x8, 0x7F, 0x38, 0x00, 0x07 },        /* 192   250      2.3   */
        { 0x1, 0x7F, 0x38, 0x00, 0x07 },        /* 230   300      2.3   */
        { 0x9, 0x7F, 0x38, 0x00, 0x07 },        /* 269   350      2.3   */
        { 0xA, 0x5E, 0x3C, 0x00, 0x03 },        /* 446   500      1.0   */
        { 0xB, 0x64, 0x39, 0x00, 0x06 },        /* 460   600      2.3   */
        { 0xE, 0x6A, 0x39, 0x00, 0x06 },        /* 537   700      2.3   */
        { 0x2, 0x7F, 0x3F, 0x00, 0x00 },        /* 400   400      0.0   */
};

struct icl_combo_phy_ddi_buf_trans {
        u32 dw2_swing_select;
        u32 dw2_swing_scalar;
        u32 dw4_scaling;
};

/* Voltage Swing Programming for VccIO 0.85V for DP */
static const struct icl_combo_phy_ddi_buf_trans icl_combo_phy_ddi_translations_dp_hdmi_0_85V[] = {
                                /* Voltage mV  db    */
        { 0x2, 0x98, 0x0018 },  /* 400         0.0   */
        { 0x2, 0x98, 0x3015 },  /* 400         3.5   */
        { 0x2, 0x98, 0x6012 },  /* 400         6.0   */
        { 0x2, 0x98, 0x900F },  /* 400         9.5   */
        { 0xB, 0x70, 0x0018 },  /* 600         0.0   */
        { 0xB, 0x70, 0x3015 },  /* 600         3.5   */
        { 0xB, 0x70, 0x6012 },  /* 600         6.0   */
        { 0x5, 0x00, 0x0018 },  /* 800         0.0   */
        { 0x5, 0x00, 0x3015 },  /* 800         3.5   */
        { 0x6, 0x98, 0x0018 },  /* 1200        0.0   */
};

/* FIXME - After table is updated in Bspec */
/* Voltage Swing Programming for VccIO 0.85V for eDP */
static const struct icl_combo_phy_ddi_buf_trans icl_combo_phy_ddi_translations_edp_0_85V[] = {
                                /* Voltage mV  db    */
        { 0x0, 0x00, 0x00 },    /* 200         0.0   */
        { 0x0, 0x00, 0x00 },    /* 200         1.5   */
        { 0x0, 0x00, 0x00 },    /* 200         4.0   */
        { 0x0, 0x00, 0x00 },    /* 200         6.0   */
        { 0x0, 0x00, 0x00 },    /* 250         0.0   */
        { 0x0, 0x00, 0x00 },    /* 250         1.5   */
        { 0x0, 0x00, 0x00 },    /* 250         4.0   */
        { 0x0, 0x00, 0x00 },    /* 300         0.0   */
        { 0x0, 0x00, 0x00 },    /* 300         1.5   */
        { 0x0, 0x00, 0x00 },    /* 350         0.0   */
};

/* Voltage Swing Programming for VccIO 0.95V for DP */
static const struct icl_combo_phy_ddi_buf_trans icl_combo_phy_ddi_translations_dp_hdmi_0_95V[] = {
                                /* Voltage mV  db    */
        { 0x2, 0x98, 0x0018 },  /* 400         0.0   */
        { 0x2, 0x98, 0x3015 },  /* 400         3.5   */
        { 0x2, 0x98, 0x6012 },  /* 400         6.0   */
        { 0x2, 0x98, 0x900F },  /* 400         9.5   */
        { 0x4, 0x98, 0x0018 },  /* 600         0.0   */
        { 0x4, 0x98, 0x3015 },  /* 600         3.5   */
        { 0x4, 0x98, 0x6012 },  /* 600         6.0   */
        { 0x5, 0x76, 0x0018 },  /* 800         0.0   */
        { 0x5, 0x76, 0x3015 },  /* 800         3.5   */
        { 0x6, 0x98, 0x0018 },  /* 1200        0.0   */
};

/* FIXME - After table is updated in Bspec */
/* Voltage Swing Programming for VccIO 0.95V for eDP */
static const struct icl_combo_phy_ddi_buf_trans icl_combo_phy_ddi_translations_edp_0_95V[] = {
                                /* Voltage mV  db    */
        { 0x0, 0x00, 0x00 },    /* 200         0.0   */
        { 0x0, 0x00, 0x00 },    /* 200         1.5   */
        { 0x0, 0x00, 0x00 },    /* 200         4.0   */
        { 0x0, 0x00, 0x00 },    /* 200         6.0   */
        { 0x0, 0x00, 0x00 },    /* 250         0.0   */
        { 0x0, 0x00, 0x00 },    /* 250         1.5   */
        { 0x0, 0x00, 0x00 },    /* 250         4.0   */
        { 0x0, 0x00, 0x00 },    /* 300         0.0   */
        { 0x0, 0x00, 0x00 },    /* 300         1.5   */
        { 0x0, 0x00, 0x00 },    /* 350         0.0   */
};

/* Voltage Swing Programming for VccIO 1.05V for DP */
static const struct icl_combo_phy_ddi_buf_trans icl_combo_phy_ddi_translations_dp_hdmi_1_05V[] = {
                                /* Voltage mV  db    */
        { 0x2, 0x98, 0x0018 },  /* 400         0.0   */
        { 0x2, 0x98, 0x3015 },  /* 400         3.5   */
        { 0x2, 0x98, 0x6012 },  /* 400         6.0   */
        { 0x2, 0x98, 0x900F },  /* 400         9.5   */
        { 0x4, 0x98, 0x0018 },  /* 600         0.0   */
        { 0x4, 0x98, 0x3015 },  /* 600         3.5   */
        { 0x4, 0x98, 0x6012 },  /* 600         6.0   */
        { 0x5, 0x71, 0x0018 },  /* 800         0.0   */
        { 0x5, 0x71, 0x3015 },  /* 800         3.5   */
        { 0x6, 0x98, 0x0018 },  /* 1200        0.0   */
};

/* FIXME - After table is updated in Bspec */
/* Voltage Swing Programming for VccIO 1.05V for eDP */
static const struct icl_combo_phy_ddi_buf_trans icl_combo_phy_ddi_translations_edp_1_05V[] = {
                                /* Voltage mV  db    */
        { 0x0, 0x00, 0x00 },    /* 200         0.0   */
        { 0x0, 0x00, 0x00 },    /* 200         1.5   */
        { 0x0, 0x00, 0x00 },    /* 200         4.0   */
        { 0x0, 0x00, 0x00 },    /* 200         6.0   */
        { 0x0, 0x00, 0x00 },    /* 250         0.0   */
        { 0x0, 0x00, 0x00 },    /* 250         1.5   */
        { 0x0, 0x00, 0x00 },    /* 250         4.0   */
        { 0x0, 0x00, 0x00 },    /* 300         0.0   */
        { 0x0, 0x00, 0x00 },    /* 300         1.5   */
        { 0x0, 0x00, 0x00 },    /* 350         0.0   */
};

struct icl_mg_phy_ddi_buf_trans {
        u32 cri_txdeemph_override_5_0;
        u32 cri_txdeemph_override_11_6;
        u32 cri_txdeemph_override_17_12;
};

static const struct icl_mg_phy_ddi_buf_trans icl_mg_phy_ddi_translations[] = {
                                /* Voltage swing  pre-emphasis */
        { 0x0, 0x1B, 0x00 },    /* 0              0   */
        { 0x0, 0x23, 0x08 },    /* 0              1   */
        { 0x0, 0x2D, 0x12 },    /* 0              2   */
        { 0x0, 0x00, 0x00 },    /* 0              3   */
        { 0x0, 0x23, 0x00 },    /* 1              0   */
        { 0x0, 0x2B, 0x09 },    /* 1              1   */
        { 0x0, 0x2E, 0x11 },    /* 1              2   */
        { 0x0, 0x2F, 0x00 },    /* 2              0   */
        { 0x0, 0x33, 0x0C },    /* 2              1   */
        { 0x0, 0x00, 0x00 },    /* 3              0   */
};

static const struct ddi_buf_trans *
bdw_get_buf_trans_edp(struct drm_i915_private *dev_priv, int *n_entries)
{
        if (dev_priv->vbt.edp.low_vswing) {
                *n_entries = ARRAY_SIZE(bdw_ddi_translations_edp);
                return bdw_ddi_translations_edp;
        } else {
                *n_entries = ARRAY_SIZE(bdw_ddi_translations_dp);
                return bdw_ddi_translations_dp;
        }
}

static const struct ddi_buf_trans *
skl_get_buf_trans_dp(struct drm_i915_private *dev_priv, int *n_entries)
{
        if (IS_SKL_ULX(dev_priv)) {
                *n_entries = ARRAY_SIZE(skl_y_ddi_translations_dp);
                return skl_y_ddi_translations_dp;
        } else if (IS_SKL_ULT(dev_priv)) {
                *n_entries = ARRAY_SIZE(skl_u_ddi_translations_dp);
                return skl_u_ddi_translations_dp;
        } else {
                *n_entries = ARRAY_SIZE(skl_ddi_translations_dp);
                return skl_ddi_translations_dp;
        }
}

static const struct ddi_buf_trans *
kbl_get_buf_trans_dp(struct drm_i915_private *dev_priv, int *n_entries)
{
        if (IS_KBL_ULX(dev_priv)) {
                *n_entries = ARRAY_SIZE(kbl_y_ddi_translations_dp);
                return kbl_y_ddi_translations_dp;
        } else if (IS_KBL_ULT(dev_priv) || IS_CFL_ULT(dev_priv)) {
                *n_entries = ARRAY_SIZE(kbl_u_ddi_translations_dp);
                return kbl_u_ddi_translations_dp;
        } else {
                *n_entries = ARRAY_SIZE(kbl_ddi_translations_dp);
                return kbl_ddi_translations_dp;
        }
}

static const struct ddi_buf_trans *
skl_get_buf_trans_edp(struct drm_i915_private *dev_priv, int *n_entries)
{
        if (dev_priv->vbt.edp.low_vswing) {
                if (IS_SKL_ULX(dev_priv) || IS_KBL_ULX(dev_priv)) {
                        *n_entries = ARRAY_SIZE(skl_y_ddi_translations_edp);
                        return skl_y_ddi_translations_edp;
                } else if (IS_SKL_ULT(dev_priv) || IS_KBL_ULT(dev_priv) ||
                           IS_CFL_ULT(dev_priv)) {
                        *n_entries = ARRAY_SIZE(skl_u_ddi_translations_edp);
                        return skl_u_ddi_translations_edp;
                } else {
                        *n_entries = ARRAY_SIZE(skl_ddi_translations_edp);
                        return skl_ddi_translations_edp;
                }
        }

        if (IS_KABYLAKE(dev_priv) || IS_COFFEELAKE(dev_priv))
                return kbl_get_buf_trans_dp(dev_priv, n_entries);
        else
                return skl_get_buf_trans_dp(dev_priv, n_entries);
}

static const struct ddi_buf_trans *
skl_get_buf_trans_hdmi(struct drm_i915_private *dev_priv, int *n_entries)
{
        if (IS_SKL_ULX(dev_priv) || IS_KBL_ULX(dev_priv)) {
                *n_entries = ARRAY_SIZE(skl_y_ddi_translations_hdmi);
                return skl_y_ddi_translations_hdmi;
        } else {
                *n_entries = ARRAY_SIZE(skl_ddi_translations_hdmi);
                return skl_ddi_translations_hdmi;
        }
}

static int skl_buf_trans_num_entries(enum port port, int n_entries)
{
        /* Only DDIA and DDIE can select the 10th register with DP */
        if (port == PORT_A || port == PORT_E)
                return min(n_entries, 10);
        else
                return min(n_entries, 9);
}

static const struct ddi_buf_trans *
intel_ddi_get_buf_trans_dp(struct drm_i915_private *dev_priv,
                           enum port port, int *n_entries)
{
        if (IS_KABYLAKE(dev_priv) || IS_COFFEELAKE(dev_priv)) {
                const struct ddi_buf_trans *ddi_translations =
                        kbl_get_buf_trans_dp(dev_priv, n_entries);
                *n_entries = skl_buf_trans_num_entries(port, *n_entries);
                return ddi_translations;
        } else if (IS_SKYLAKE(dev_priv)) {
                const struct ddi_buf_trans *ddi_translations =
                        skl_get_buf_trans_dp(dev_priv, n_entries);
                *n_entries = skl_buf_trans_num_entries(port, *n_entries);
                return ddi_translations;
        } else if (IS_BROADWELL(dev_priv)) {
                *n_entries = ARRAY_SIZE(bdw_ddi_translations_dp);
                return  bdw_ddi_translations_dp;
        } else if (IS_HASWELL(dev_priv)) {
                *n_entries = ARRAY_SIZE(hsw_ddi_translations_dp);
                return hsw_ddi_translations_dp;
        }

        *n_entries = 0;
        return NULL;
}

static const struct ddi_buf_trans *
intel_ddi_get_buf_trans_edp(struct drm_i915_private *dev_priv,
                            enum port port, int *n_entries)
{
        if (IS_GEN9_BC(dev_priv)) {
                const struct ddi_buf_trans *ddi_translations =
                        skl_get_buf_trans_edp(dev_priv, n_entries);
                *n_entries = skl_buf_trans_num_entries(port, *n_entries);
                return ddi_translations;
        } else if (IS_BROADWELL(dev_priv)) {
                return bdw_get_buf_trans_edp(dev_priv, n_entries);
        } else if (IS_HASWELL(dev_priv)) {
                *n_entries = ARRAY_SIZE(hsw_ddi_translations_dp);
                return hsw_ddi_translations_dp;
        }

        *n_entries = 0;
        return NULL;
}

static const struct ddi_buf_trans *
intel_ddi_get_buf_trans_fdi(struct drm_i915_private *dev_priv,
                            int *n_entries)
{
        if (IS_BROADWELL(dev_priv)) {
                *n_entries = ARRAY_SIZE(bdw_ddi_translations_fdi);
                return bdw_ddi_translations_fdi;
        } else if (IS_HASWELL(dev_priv)) {
                *n_entries = ARRAY_SIZE(hsw_ddi_translations_fdi);
                return hsw_ddi_translations_fdi;
        }

        *n_entries = 0;
        return NULL;
}

static const struct ddi_buf_trans *
intel_ddi_get_buf_trans_hdmi(struct drm_i915_private *dev_priv,
                             int *n_entries)
{
        if (IS_GEN9_BC(dev_priv)) {
                return skl_get_buf_trans_hdmi(dev_priv, n_entries);
        } else if (IS_BROADWELL(dev_priv)) {
                *n_entries = ARRAY_SIZE(bdw_ddi_translations_hdmi);
                return bdw_ddi_translations_hdmi;
        } else if (IS_HASWELL(dev_priv)) {
                *n_entries = ARRAY_SIZE(hsw_ddi_translations_hdmi);
                return hsw_ddi_translations_hdmi;
        }

        *n_entries = 0;
        return NULL;
}

static const struct bxt_ddi_buf_trans *
bxt_get_buf_trans_dp(struct drm_i915_private *dev_priv, int *n_entries)
{
        *n_entries = ARRAY_SIZE(bxt_ddi_translations_dp);
        return bxt_ddi_translations_dp;
}

static const struct bxt_ddi_buf_trans *
bxt_get_buf_trans_edp(struct drm_i915_private *dev_priv, int *n_entries)
{
        if (dev_priv->vbt.edp.low_vswing) {
                *n_entries = ARRAY_SIZE(bxt_ddi_translations_edp);
                return bxt_ddi_translations_edp;
        }

        return bxt_get_buf_trans_dp(dev_priv, n_entries);
}

static const struct bxt_ddi_buf_trans *
bxt_get_buf_trans_hdmi(struct drm_i915_private *dev_priv, int *n_entries)
{
        *n_entries = ARRAY_SIZE(bxt_ddi_translations_hdmi);
        return bxt_ddi_translations_hdmi;
}

static const struct cnl_ddi_buf_trans *
cnl_get_buf_trans_hdmi(struct drm_i915_private *dev_priv, int *n_entries)
{
        u32 voltage = I915_READ(CNL_PORT_COMP_DW3) & VOLTAGE_INFO_MASK;

        if (voltage == VOLTAGE_INFO_0_85V) {
                *n_entries = ARRAY_SIZE(cnl_ddi_translations_hdmi_0_85V);
                return cnl_ddi_translations_hdmi_0_85V;
        } else if (voltage == VOLTAGE_INFO_0_95V) {
                *n_entries = ARRAY_SIZE(cnl_ddi_translations_hdmi_0_95V);
                return cnl_ddi_translations_hdmi_0_95V;
        } else if (voltage == VOLTAGE_INFO_1_05V) {
                *n_entries = ARRAY_SIZE(cnl_ddi_translations_hdmi_1_05V);
                return cnl_ddi_translations_hdmi_1_05V;
        } else {
                *n_entries = 1; /* shut up gcc */
                MISSING_CASE(voltage);
        }
        return NULL;
}

static const struct cnl_ddi_buf_trans *
cnl_get_buf_trans_dp(struct drm_i915_private *dev_priv, int *n_entries)
{
        u32 voltage = I915_READ(CNL_PORT_COMP_DW3) & VOLTAGE_INFO_MASK;

        if (voltage == VOLTAGE_INFO_0_85V) {
                *n_entries = ARRAY_SIZE(cnl_ddi_translations_dp_0_85V);
                return cnl_ddi_translations_dp_0_85V;
        } else if (voltage == VOLTAGE_INFO_0_95V) {
                *n_entries = ARRAY_SIZE(cnl_ddi_translations_dp_0_95V);
                return cnl_ddi_translations_dp_0_95V;
        } else if (voltage == VOLTAGE_INFO_1_05V) {
                *n_entries = ARRAY_SIZE(cnl_ddi_translations_dp_1_05V);
                return cnl_ddi_translations_dp_1_05V;
        } else {
                *n_entries = 1; /* shut up gcc */
                MISSING_CASE(voltage);
        }
        return NULL;
}

static const struct cnl_ddi_buf_trans *
cnl_get_buf_trans_edp(struct drm_i915_private *dev_priv, int *n_entries)
{
        u32 voltage = I915_READ(CNL_PORT_COMP_DW3) & VOLTAGE_INFO_MASK;

        if (dev_priv->vbt.edp.low_vswing) {
                if (voltage == VOLTAGE_INFO_0_85V) {
                        *n_entries = ARRAY_SIZE(cnl_ddi_translations_edp_0_85V);
                        return cnl_ddi_translations_edp_0_85V;
                } else if (voltage == VOLTAGE_INFO_0_95V) {
                        *n_entries = ARRAY_SIZE(cnl_ddi_translations_edp_0_95V);
                        return cnl_ddi_translations_edp_0_95V;
                } else if (voltage == VOLTAGE_INFO_1_05V) {
                        *n_entries = ARRAY_SIZE(cnl_ddi_translations_edp_1_05V);
                        return cnl_ddi_translations_edp_1_05V;
                } else {
                        *n_entries = 1; /* shut up gcc */
                        MISSING_CASE(voltage);
                }
                return NULL;
        } else {
                return cnl_get_buf_trans_dp(dev_priv, n_entries);
        }
}

static const struct icl_combo_phy_ddi_buf_trans *
icl_get_combo_buf_trans(struct drm_i915_private *dev_priv, enum port port,
                        int type, int *n_entries)
{
        u32 voltage = I915_READ(ICL_PORT_COMP_DW3(port)) & VOLTAGE_INFO_MASK;

        if (type == INTEL_OUTPUT_EDP && dev_priv->vbt.edp.low_vswing) {
                switch (voltage) {
                case VOLTAGE_INFO_0_85V:
                        *n_entries = ARRAY_SIZE(icl_combo_phy_ddi_translations_edp_0_85V);
                        return icl_combo_phy_ddi_translations_edp_0_85V;
                case VOLTAGE_INFO_0_95V:
                        *n_entries = ARRAY_SIZE(icl_combo_phy_ddi_translations_edp_0_95V);
                        return icl_combo_phy_ddi_translations_edp_0_95V;
                case VOLTAGE_INFO_1_05V:
                        *n_entries = ARRAY_SIZE(icl_combo_phy_ddi_translations_edp_1_05V);
                        return icl_combo_phy_ddi_translations_edp_1_05V;
                default:
                        MISSING_CASE(voltage);
                        return NULL;
                }
        } else {
                switch (voltage) {
                case VOLTAGE_INFO_0_85V:
                        *n_entries = ARRAY_SIZE(icl_combo_phy_ddi_translations_dp_hdmi_0_85V);
                        return icl_combo_phy_ddi_translations_dp_hdmi_0_85V;
                case VOLTAGE_INFO_0_95V:
                        *n_entries = ARRAY_SIZE(icl_combo_phy_ddi_translations_dp_hdmi_0_95V);
                        return icl_combo_phy_ddi_translations_dp_hdmi_0_95V;
                case VOLTAGE_INFO_1_05V:
                        *n_entries = ARRAY_SIZE(icl_combo_phy_ddi_translations_dp_hdmi_1_05V);
                        return icl_combo_phy_ddi_translations_dp_hdmi_1_05V;
                default:
                        MISSING_CASE(voltage);
                        return NULL;
                }
        }
}

static int intel_ddi_hdmi_level(struct drm_i915_private *dev_priv, enum port port)
{
        int n_entries, level, default_entry;

        level = dev_priv->vbt.ddi_port_info[port].hdmi_level_shift;

        if (IS_ICELAKE(dev_priv)) {
                if (intel_port_is_combophy(dev_priv, port))
                        icl_get_combo_buf_trans(dev_priv, port,
                                                INTEL_OUTPUT_HDMI, &n_entries);
                else
                        n_entries = ARRAY_SIZE(icl_mg_phy_ddi_translations);
                default_entry = n_entries - 1;
        } else if (IS_CANNONLAKE(dev_priv)) {
                cnl_get_buf_trans_hdmi(dev_priv, &n_entries);
                default_entry = n_entries - 1;
        } else if (IS_GEN9_LP(dev_priv)) {
                bxt_get_buf_trans_hdmi(dev_priv, &n_entries);
                default_entry = n_entries - 1;
        } else if (IS_GEN9_BC(dev_priv)) {
                intel_ddi_get_buf_trans_hdmi(dev_priv, &n_entries);
                default_entry = 8;
        } else if (IS_BROADWELL(dev_priv)) {
                intel_ddi_get_buf_trans_hdmi(dev_priv, &n_entries);
                default_entry = 7;
        } else if (IS_HASWELL(dev_priv)) {
                intel_ddi_get_buf_trans_hdmi(dev_priv, &n_entries);
                default_entry = 6;
        } else {
                WARN(1, "ddi translation table missing\n");
                return 0;
        }

        /* Choose a good default if VBT is badly populated */
        if (level == HDMI_LEVEL_SHIFT_UNKNOWN || level >= n_entries)
                level = default_entry;

        if (WARN_ON_ONCE(n_entries == 0))
                return 0;
        if (WARN_ON_ONCE(level >= n_entries))
                level = n_entries - 1;

        return level;
}

/*
 * Starting with Haswell, DDI port buffers must be programmed with correct
 * values in advance. This function programs the correct values for
 * DP/eDP/FDI use cases.
 */
static void intel_prepare_dp_ddi_buffers(struct intel_encoder *encoder,
                                         const struct intel_crtc_state *crtc_state)
{
        struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
        u32 iboost_bit = 0;
        int i, n_entries;
        enum port port = encoder->port;
        const struct ddi_buf_trans *ddi_translations;

        if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_ANALOG))
                ddi_translations = intel_ddi_get_buf_trans_fdi(dev_priv,
                                                               &n_entries);
        else if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_EDP))
                ddi_translations = intel_ddi_get_buf_trans_edp(dev_priv, port,
                                                               &n_entries);
        else
                ddi_translations = intel_ddi_get_buf_trans_dp(dev_priv, port,
                                                              &n_entries);

        /* If we're boosting the current, set bit 31 of trans1 */
        if (IS_GEN9_BC(dev_priv) &&
            dev_priv->vbt.ddi_port_info[port].dp_boost_level)
                iboost_bit = DDI_BUF_BALANCE_LEG_ENABLE;

        for (i = 0; i < n_entries; i++) {
                I915_WRITE(DDI_BUF_TRANS_LO(port, i),
                           ddi_translations[i].trans1 | iboost_bit);
                I915_WRITE(DDI_BUF_TRANS_HI(port, i),
                           ddi_translations[i].trans2);
        }
}

/*
 * Starting with Haswell, DDI port buffers must be programmed with correct
 * values in advance. This function programs the correct values for
 * HDMI/DVI use cases.
 */
static void intel_prepare_hdmi_ddi_buffers(struct intel_encoder *encoder,
                                           int level)
{
        struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
        u32 iboost_bit = 0;
        int n_entries;
        enum port port = encoder->port;
        const struct ddi_buf_trans *ddi_translations;

        ddi_translations = intel_ddi_get_buf_trans_hdmi(dev_priv, &n_entries);

        if (WARN_ON_ONCE(!ddi_translations))
                return;
        if (WARN_ON_ONCE(level >= n_entries))
                level = n_entries - 1;

        /* If we're boosting the current, set bit 31 of trans1 */
        if (IS_GEN9_BC(dev_priv) &&
            dev_priv->vbt.ddi_port_info[port].hdmi_boost_level)
                iboost_bit = DDI_BUF_BALANCE_LEG_ENABLE;

        /* Entry 9 is for HDMI: */
        I915_WRITE(DDI_BUF_TRANS_LO(port, 9),
                   ddi_translations[level].trans1 | iboost_bit);
        I915_WRITE(DDI_BUF_TRANS_HI(port, 9),
                   ddi_translations[level].trans2);
}

static void intel_wait_ddi_buf_idle(struct drm_i915_private *dev_priv,
                                    enum port port)
{
        i915_reg_t reg = DDI_BUF_CTL(port);
        int i;

        for (i = 0; i < 16; i++) {
                udelay(1);
                if (I915_READ(reg) & DDI_BUF_IS_IDLE)
                        return;
        }
        DRM_ERROR("Timeout waiting for DDI BUF %c idle bit\n", port_name(port));
}

static uint32_t hsw_pll_to_ddi_pll_sel(const struct intel_shared_dpll *pll)
{
        switch (pll->info->id) {
        case DPLL_ID_WRPLL1:
                return PORT_CLK_SEL_WRPLL1;
        case DPLL_ID_WRPLL2:
                return PORT_CLK_SEL_WRPLL2;
        case DPLL_ID_SPLL:
                return PORT_CLK_SEL_SPLL;
        case DPLL_ID_LCPLL_810:
                return PORT_CLK_SEL_LCPLL_810;
        case DPLL_ID_LCPLL_1350:
                return PORT_CLK_SEL_LCPLL_1350;
        case DPLL_ID_LCPLL_2700:
                return PORT_CLK_SEL_LCPLL_2700;
        default:
                MISSING_CASE(pll->info->id);
                return PORT_CLK_SEL_NONE;
        }
}

static uint32_t icl_pll_to_ddi_pll_sel(struct intel_encoder *encoder,
                                       const struct intel_shared_dpll *pll)
{
        struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc);
        int clock = crtc->config->port_clock;
        const enum intel_dpll_id id = pll->info->id;

        switch (id) {
        default:
                MISSING_CASE(id);
                /* fall through */
        case DPLL_ID_ICL_DPLL0:
        case DPLL_ID_ICL_DPLL1:
                return DDI_CLK_SEL_NONE;
        case DPLL_ID_ICL_TBTPLL:
                switch (clock) {
                case 162000:
                        return DDI_CLK_SEL_TBT_162;
                case 270000:
                        return DDI_CLK_SEL_TBT_270;
                case 540000:
                        return DDI_CLK_SEL_TBT_540;
                case 810000:
                        return DDI_CLK_SEL_TBT_810;
                default:
                        MISSING_CASE(clock);
                        return DDI_CLK_SEL_NONE;
                }
        case DPLL_ID_ICL_MGPLL1:
        case DPLL_ID_ICL_MGPLL2:
        case DPLL_ID_ICL_MGPLL3:
        case DPLL_ID_ICL_MGPLL4:
                return DDI_CLK_SEL_MG;
        }
}

/* Starting with Haswell, different DDI ports can work in FDI mode for
 * connection to the PCH-located connectors. For this, it is necessary to train
 * both the DDI port and PCH receiver for the desired DDI buffer settings.
 *
 * The recommended port to work in FDI mode is DDI E, which we use here. Also,
 * please note that when FDI mode is active on DDI E, it shares 2 lines with
 * DDI A (which is used for eDP)
 */

void hsw_fdi_link_train(struct intel_crtc *crtc,
                        const struct intel_crtc_state *crtc_state)
{
        struct drm_device *dev = crtc->base.dev;
        struct drm_i915_private *dev_priv = to_i915(dev);
        struct intel_encoder *encoder;
        u32 temp, i, rx_ctl_val, ddi_pll_sel;

        for_each_encoder_on_crtc(dev, &crtc->base, encoder) {
                WARN_ON(encoder->type != INTEL_OUTPUT_ANALOG);
                intel_prepare_dp_ddi_buffers(encoder, crtc_state);
        }

        /* Set the FDI_RX_MISC pwrdn lanes and the 2 workarounds listed at the
         * mode set "sequence for CRT port" document:
         * - TP1 to TP2 time with the default value
         * - FDI delay to 90h
         *
         * WaFDIAutoLinkSetTimingOverrride:hsw
         */
        I915_WRITE(FDI_RX_MISC(PIPE_A), FDI_RX_PWRDN_LANE1_VAL(2) |
                                  FDI_RX_PWRDN_LANE0_VAL(2) |
                                  FDI_RX_TP1_TO_TP2_48 | FDI_RX_FDI_DELAY_90);

        /* Enable the PCH Receiver FDI PLL */
        rx_ctl_val = dev_priv->fdi_rx_config | FDI_RX_ENHANCE_FRAME_ENABLE |
                     FDI_RX_PLL_ENABLE |
                     FDI_DP_PORT_WIDTH(crtc_state->fdi_lanes);
        I915_WRITE(FDI_RX_CTL(PIPE_A), rx_ctl_val);
        POSTING_READ(FDI_RX_CTL(PIPE_A));
        udelay(220);

        /* Switch from Rawclk to PCDclk */
        rx_ctl_val |= FDI_PCDCLK;
        I915_WRITE(FDI_RX_CTL(PIPE_A), rx_ctl_val);

        /* Configure Port Clock Select */
        ddi_pll_sel = hsw_pll_to_ddi_pll_sel(crtc_state->shared_dpll);
        I915_WRITE(PORT_CLK_SEL(PORT_E), ddi_pll_sel);
        WARN_ON(ddi_pll_sel != PORT_CLK_SEL_SPLL);

        /* Start the training iterating through available voltages and emphasis,
         * testing each value twice. */
        for (i = 0; i < ARRAY_SIZE(hsw_ddi_translations_fdi) * 2; i++) {
                /* Configure DP_TP_CTL with auto-training */
                I915_WRITE(DP_TP_CTL(PORT_E),
                                        DP_TP_CTL_FDI_AUTOTRAIN |
                                        DP_TP_CTL_ENHANCED_FRAME_ENABLE |
                                        DP_TP_CTL_LINK_TRAIN_PAT1 |
                                        DP_TP_CTL_ENABLE);

                /* Configure and enable DDI_BUF_CTL for DDI E with next voltage.
                 * DDI E does not support port reversal, the functionality is
                 * achieved on the PCH side in FDI_RX_CTL, so no need to set the
                 * port reversal bit */
                I915_WRITE(DDI_BUF_CTL(PORT_E),
                           DDI_BUF_CTL_ENABLE |
                           ((crtc_state->fdi_lanes - 1) << 1) |
                           DDI_BUF_TRANS_SELECT(i / 2));
                POSTING_READ(DDI_BUF_CTL(PORT_E));

                udelay(600);

                /* Program PCH FDI Receiver TU */
                I915_WRITE(FDI_RX_TUSIZE1(PIPE_A), TU_SIZE(64));

                /* Enable PCH FDI Receiver with auto-training */
                rx_ctl_val |= FDI_RX_ENABLE | FDI_LINK_TRAIN_AUTO;
                I915_WRITE(FDI_RX_CTL(PIPE_A), rx_ctl_val);
                POSTING_READ(FDI_RX_CTL(PIPE_A));

                /* Wait for FDI receiver lane calibration */
                udelay(30);

                /* Unset FDI_RX_MISC pwrdn lanes */
                temp = I915_READ(FDI_RX_MISC(PIPE_A));
                temp &= ~(FDI_RX_PWRDN_LANE1_MASK | FDI_RX_PWRDN_LANE0_MASK);
                I915_WRITE(FDI_RX_MISC(PIPE_A), temp);
                POSTING_READ(FDI_RX_MISC(PIPE_A));

                /* Wait for FDI auto training time */
                udelay(5);

                temp = I915_READ(DP_TP_STATUS(PORT_E));
                if (temp & DP_TP_STATUS_AUTOTRAIN_DONE) {
                        DRM_DEBUG_KMS("FDI link training done on step %d\n", i);
                        break;
                }

                /*
                 * Leave things enabled even if we failed to train FDI.
                 * Results in less fireworks from the state checker.
                 */
                if (i == ARRAY_SIZE(hsw_ddi_translations_fdi) * 2 - 1) {
                        DRM_ERROR("FDI link training failed!\n");
                        break;
                }

                rx_ctl_val &= ~FDI_RX_ENABLE;
                I915_WRITE(FDI_RX_CTL(PIPE_A), rx_ctl_val);
                POSTING_READ(FDI_RX_CTL(PIPE_A));

                temp = I915_READ(DDI_BUF_CTL(PORT_E));
                temp &= ~DDI_BUF_CTL_ENABLE;
                I915_WRITE(DDI_BUF_CTL(PORT_E), temp);
                POSTING_READ(DDI_BUF_CTL(PORT_E));

                /* Disable DP_TP_CTL and FDI_RX_CTL and retry */
                temp = I915_READ(DP_TP_CTL(PORT_E));
                temp &= ~(DP_TP_CTL_ENABLE | DP_TP_CTL_LINK_TRAIN_MASK);
                temp |= DP_TP_CTL_LINK_TRAIN_PAT1;
                I915_WRITE(DP_TP_CTL(PORT_E), temp);
                POSTING_READ(DP_TP_CTL(PORT_E));

                intel_wait_ddi_buf_idle(dev_priv, PORT_E);

                /* Reset FDI_RX_MISC pwrdn lanes */
                temp = I915_READ(FDI_RX_MISC(PIPE_A));
                temp &= ~(FDI_RX_PWRDN_LANE1_MASK | FDI_RX_PWRDN_LANE0_MASK);
                temp |= FDI_RX_PWRDN_LANE1_VAL(2) | FDI_RX_PWRDN_LANE0_VAL(2);
                I915_WRITE(FDI_RX_MISC(PIPE_A), temp);
                POSTING_READ(FDI_RX_MISC(PIPE_A));
        }

        /* Enable normal pixel sending for FDI */
        I915_WRITE(DP_TP_CTL(PORT_E),
                   DP_TP_CTL_FDI_AUTOTRAIN |
                   DP_TP_CTL_LINK_TRAIN_NORMAL |
                   DP_TP_CTL_ENHANCED_FRAME_ENABLE |
                   DP_TP_CTL_ENABLE);
}

static void intel_ddi_init_dp_buf_reg(struct intel_encoder *encoder)
{
        struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
        struct intel_digital_port *intel_dig_port =
                enc_to_dig_port(&encoder->base);

        intel_dp->DP = intel_dig_port->saved_port_bits |
                DDI_BUF_CTL_ENABLE | DDI_BUF_TRANS_SELECT(0);
        intel_dp->DP |= DDI_PORT_WIDTH(intel_dp->lane_count);
}

static struct intel_encoder *
intel_ddi_get_crtc_encoder(struct intel_crtc *crtc)
{
        struct drm_device *dev = crtc->base.dev;
        struct intel_encoder *encoder, *ret = NULL;
        int num_encoders = 0;

        for_each_encoder_on_crtc(dev, &crtc->base, encoder) {
                ret = encoder;
                num_encoders++;
        }

        if (num_encoders != 1)
                WARN(1, "%d encoders on crtc for pipe %c\n", num_encoders,
                     pipe_name(crtc->pipe));

        BUG_ON(ret == NULL);
        return ret;
}

#define LC_FREQ 2700

static int hsw_ddi_calc_wrpll_link(struct drm_i915_private *dev_priv,
                                   i915_reg_t reg)
{
        int refclk = LC_FREQ;
        int n, p, r;
        u32 wrpll;

        wrpll = I915_READ(reg);
        switch (wrpll & WRPLL_PLL_REF_MASK) {
        case WRPLL_PLL_SSC:
        case WRPLL_PLL_NON_SSC:
                /*
                 * We could calculate spread here, but our checking
                 * code only cares about 5% accuracy, and spread is a max of
                 * 0.5% downspread.
                 */
                refclk = 135;
                break;
        case WRPLL_PLL_LCPLL:
                refclk = LC_FREQ;
                break;
        default:
                WARN(1, "bad wrpll refclk\n");
                return 0;
        }

        r = wrpll & WRPLL_DIVIDER_REF_MASK;
        p = (wrpll & WRPLL_DIVIDER_POST_MASK) >> WRPLL_DIVIDER_POST_SHIFT;
        n = (wrpll & WRPLL_DIVIDER_FB_MASK) >> WRPLL_DIVIDER_FB_SHIFT;

        /* Convert to KHz, p & r have a fixed point portion */
        return (refclk * n * 100) / (p * r);
}

static int skl_calc_wrpll_link(struct drm_i915_private *dev_priv,
                               enum intel_dpll_id pll_id)
{
        i915_reg_t cfgcr1_reg, cfgcr2_reg;
        uint32_t cfgcr1_val, cfgcr2_val;
        uint32_t p0, p1, p2, dco_freq;

        cfgcr1_reg = DPLL_CFGCR1(pll_id);
        cfgcr2_reg = DPLL_CFGCR2(pll_id);

        cfgcr1_val = I915_READ(cfgcr1_reg);
        cfgcr2_val = I915_READ(cfgcr2_reg);

        p0 = cfgcr2_val & DPLL_CFGCR2_PDIV_MASK;
        p2 = cfgcr2_val & DPLL_CFGCR2_KDIV_MASK;

        if (cfgcr2_val &  DPLL_CFGCR2_QDIV_MODE(1))
                p1 = (cfgcr2_val & DPLL_CFGCR2_QDIV_RATIO_MASK) >> 8;
        else
                p1 = 1;


        switch (p0) {
        case DPLL_CFGCR2_PDIV_1:
                p0 = 1;
                break;
        case DPLL_CFGCR2_PDIV_2:
                p0 = 2;
                break;
        case DPLL_CFGCR2_PDIV_3:
                p0 = 3;
                break;
        case DPLL_CFGCR2_PDIV_7:
                p0 = 7;
                break;
        }

        switch (p2) {
        case DPLL_CFGCR2_KDIV_5:
                p2 = 5;
                break;
        case DPLL_CFGCR2_KDIV_2:
                p2 = 2;
                break;
        case DPLL_CFGCR2_KDIV_3:
                p2 = 3;
                break;
        case DPLL_CFGCR2_KDIV_1:
                p2 = 1;
                break;
        }

        dco_freq = (cfgcr1_val & DPLL_CFGCR1_DCO_INTEGER_MASK) * 24 * 1000;

        dco_freq += (((cfgcr1_val & DPLL_CFGCR1_DCO_FRACTION_MASK) >> 9) * 24 *
                1000) / 0x8000;

        return dco_freq / (p0 * p1 * p2 * 5);
}

static int cnl_calc_wrpll_link(struct drm_i915_private *dev_priv,
                               enum intel_dpll_id pll_id)
{
        uint32_t cfgcr0, cfgcr1;
        uint32_t p0, p1, p2, dco_freq, ref_clock;

        if (INTEL_GEN(dev_priv) >= 11) {
                cfgcr0 = I915_READ(ICL_DPLL_CFGCR0(pll_id));
                cfgcr1 = I915_READ(ICL_DPLL_CFGCR1(pll_id));
        } else {
                cfgcr0 = I915_READ(CNL_DPLL_CFGCR0(pll_id));
                cfgcr1 = I915_READ(CNL_DPLL_CFGCR1(pll_id));
        }

        p0 = cfgcr1 & DPLL_CFGCR1_PDIV_MASK;
        p2 = cfgcr1 & DPLL_CFGCR1_KDIV_MASK;

        if (cfgcr1 & DPLL_CFGCR1_QDIV_MODE(1))
                p1 = (cfgcr1 & DPLL_CFGCR1_QDIV_RATIO_MASK) >>
                        DPLL_CFGCR1_QDIV_RATIO_SHIFT;
        else
                p1 = 1;


        switch (p0) {
        case DPLL_CFGCR1_PDIV_2:
                p0 = 2;
                break;
        case DPLL_CFGCR1_PDIV_3:
                p0 = 3;
                break;
        case DPLL_CFGCR1_PDIV_5:
                p0 = 5;
                break;
        case DPLL_CFGCR1_PDIV_7:
                p0 = 7;
                break;
        }

        switch (p2) {
        case DPLL_CFGCR1_KDIV_1:
                p2 = 1;
                break;
        case DPLL_CFGCR1_KDIV_2:
                p2 = 2;
                break;
        case DPLL_CFGCR1_KDIV_4:
                p2 = 4;
                break;
        }

        ref_clock = cnl_hdmi_pll_ref_clock(dev_priv);

        dco_freq = (cfgcr0 & DPLL_CFGCR0_DCO_INTEGER_MASK) * ref_clock;

        dco_freq += (((cfgcr0 & DPLL_CFGCR0_DCO_FRACTION_MASK) >>
                      DPLL_CFGCR0_DCO_FRACTION_SHIFT) * ref_clock) / 0x8000;

        if (WARN_ON(p0 == 0 || p1 == 0 || p2 == 0))
                return 0;

        return dco_freq / (p0 * p1 * p2 * 5);
}

static int icl_calc_tbt_pll_link(struct drm_i915_private *dev_priv,
                                 enum port port)
{
        u32 val = I915_READ(DDI_CLK_SEL(port)) & DDI_CLK_SEL_MASK;

        switch (val) {
        case DDI_CLK_SEL_NONE:
                return 0;
        case DDI_CLK_SEL_TBT_162:
                return 162000;
        case DDI_CLK_SEL_TBT_270:
                return 270000;
        case DDI_CLK_SEL_TBT_540:
                return 540000;
        case DDI_CLK_SEL_TBT_810:
                return 810000;
        default:
                MISSING_CASE(val);
                return 0;
        }
}

static int icl_calc_mg_pll_link(struct drm_i915_private *dev_priv,
                                enum port port)
{
        u32 mg_pll_div0, mg_clktop_hsclkctl;
        u32 m1, m2_int, m2_frac, div1, div2, refclk;
        u64 tmp;

        refclk = dev_priv->cdclk.hw.ref;

        mg_pll_div0 = I915_READ(MG_PLL_DIV0(port));
        mg_clktop_hsclkctl = I915_READ(MG_CLKTOP2_HSCLKCTL(port));

        m1 = I915_READ(MG_PLL_DIV1(port)) & MG_PLL_DIV1_FBPREDIV_MASK;
        m2_int = mg_pll_div0 & MG_PLL_DIV0_FBDIV_INT_MASK;
        m2_frac = (mg_pll_div0 & MG_PLL_DIV0_FRACNEN_H) ?
                  (mg_pll_div0 & MG_PLL_DIV0_FBDIV_FRAC_MASK) >>
                  MG_PLL_DIV0_FBDIV_FRAC_SHIFT : 0;

        switch (mg_clktop_hsclkctl & MG_CLKTOP2_HSCLKCTL_HSDIV_RATIO_MASK) {
        case MG_CLKTOP2_HSCLKCTL_HSDIV_RATIO_2:
                div1 = 2;
                break;
        case MG_CLKTOP2_HSCLKCTL_HSDIV_RATIO_3:
                div1 = 3;
                break;
        case MG_CLKTOP2_HSCLKCTL_HSDIV_RATIO_5:
                div1 = 5;
                break;
        case MG_CLKTOP2_HSCLKCTL_HSDIV_RATIO_7:
                div1 = 7;
                break;
        default:
                MISSING_CASE(mg_clktop_hsclkctl);
                return 0;
        }

        div2 = (mg_clktop_hsclkctl & MG_CLKTOP2_HSCLKCTL_DSDIV_RATIO_MASK) >>
                MG_CLKTOP2_HSCLKCTL_DSDIV_RATIO_SHIFT;
        /* div2 value of 0 is same as 1 means no div */
        if (div2 == 0)
                div2 = 1;

        /*
         * Adjust the original formula to delay the division by 2^22 in order to
         * minimize possible rounding errors.
         */
        tmp = (u64)m1 * m2_int * refclk +
              (((u64)m1 * m2_frac * refclk) >> 22);
        tmp = div_u64(tmp, 5 * div1 * div2);

        return tmp;
}

static void ddi_dotclock_get(struct intel_crtc_state *pipe_config)
{
        int dotclock;

        if (pipe_config->has_pch_encoder)
                dotclock = intel_dotclock_calculate(pipe_config->port_clock,
                                                    &pipe_config->fdi_m_n);
        else if (intel_crtc_has_dp_encoder(pipe_config))
                dotclock = intel_dotclock_calculate(pipe_config->port_clock,
                                                    &pipe_config->dp_m_n);
        else if (pipe_config->has_hdmi_sink && pipe_config->pipe_bpp == 36)
                dotclock = pipe_config->port_clock * 2 / 3;
        else
                dotclock = pipe_config->port_clock;

        if (pipe_config->ycbcr420)
                dotclock *= 2;

        if (pipe_config->pixel_multiplier)
                dotclock /= pipe_config->pixel_multiplier;

        pipe_config->base.adjusted_mode.crtc_clock = dotclock;
}

static void icl_ddi_clock_get(struct intel_encoder *encoder,
                              struct intel_crtc_state *pipe_config)
{
        struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
        enum port port = encoder->port;
        int link_clock = 0;
        uint32_t pll_id;

        pll_id = intel_get_shared_dpll_id(dev_priv, pipe_config->shared_dpll);
        if (intel_port_is_combophy(dev_priv, port)) {
                if (intel_crtc_has_type(pipe_config, INTEL_OUTPUT_HDMI))
                        link_clock = cnl_calc_wrpll_link(dev_priv, pll_id);
                else
                        link_clock = icl_calc_dp_combo_pll_link(dev_priv,
                                                                pll_id);
        } else {
                if (pll_id == DPLL_ID_ICL_TBTPLL)
                        link_clock = icl_calc_tbt_pll_link(dev_priv, port);
                else
                        link_clock = icl_calc_mg_pll_link(dev_priv, port);
        }

        pipe_config->port_clock = link_clock;
        ddi_dotclock_get(pipe_config);
}

static void cnl_ddi_clock_get(struct intel_encoder *encoder,
                              struct intel_crtc_state *pipe_config)
{
        struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
        int link_clock = 0;
        uint32_t cfgcr0;
        enum intel_dpll_id pll_id;

        pll_id = intel_get_shared_dpll_id(dev_priv, pipe_config->shared_dpll);

        cfgcr0 = I915_READ(CNL_DPLL_CFGCR0(pll_id));

        if (cfgcr0 & DPLL_CFGCR0_HDMI_MODE) {
                link_clock = cnl_calc_wrpll_link(dev_priv, pll_id);
        } else {
                link_clock = cfgcr0 & DPLL_CFGCR0_LINK_RATE_MASK;

                switch (link_clock) {
                case DPLL_CFGCR0_LINK_RATE_810:
                        link_clock = 81000;
                        break;
                case DPLL_CFGCR0_LINK_RATE_1080:
                        link_clock = 108000;
                        break;
                case DPLL_CFGCR0_LINK_RATE_1350:
                        link_clock = 135000;
                        break;
                case DPLL_CFGCR0_LINK_RATE_1620:
                        link_clock = 162000;
                        break;
                case DPLL_CFGCR0_LINK_RATE_2160:
                        link_clock = 216000;
                        break;
                case DPLL_CFGCR0_LINK_RATE_2700:
                        link_clock = 270000;
                        break;
                case DPLL_CFGCR0_LINK_RATE_3240:
                        link_clock = 324000;
                        break;
                case DPLL_CFGCR0_LINK_RATE_4050:
                        link_clock = 405000;
                        break;
                default:
                        WARN(1, "Unsupported link rate\n");
                        break;
                }
                link_clock *= 2;
        }

        pipe_config->port_clock = link_clock;

        ddi_dotclock_get(pipe_config);
}

static void skl_ddi_clock_get(struct intel_encoder *encoder,
                                struct intel_crtc_state *pipe_config)
{
        struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
        int link_clock = 0;
        uint32_t dpll_ctl1;
        enum intel_dpll_id pll_id;

        pll_id = intel_get_shared_dpll_id(dev_priv, pipe_config->shared_dpll);

        dpll_ctl1 = I915_READ(DPLL_CTRL1);

        if (dpll_ctl1 & DPLL_CTRL1_HDMI_MODE(pll_id)) {
                link_clock = skl_calc_wrpll_link(dev_priv, pll_id);
        } else {
                link_clock = dpll_ctl1 & DPLL_CTRL1_LINK_RATE_MASK(pll_id);
                link_clock >>= DPLL_CTRL1_LINK_RATE_SHIFT(pll_id);

                switch (link_clock) {
                case DPLL_CTRL1_LINK_RATE_810:
                        link_clock = 81000;
                        break;
                case DPLL_CTRL1_LINK_RATE_1080:
                        link_clock = 108000;
                        break;
                case DPLL_CTRL1_LINK_RATE_1350:
                        link_clock = 135000;
                        break;
                case DPLL_CTRL1_LINK_RATE_1620:
                        link_clock = 162000;
                        break;
                case DPLL_CTRL1_LINK_RATE_2160:
                        link_clock = 216000;
                        break;
                case DPLL_CTRL1_LINK_RATE_2700:
                        link_clock = 270000;
                        break;
                default:
                        WARN(1, "Unsupported link rate\n");
                        break;
                }
                link_clock *= 2;
        }

        pipe_config->port_clock = link_clock;

        ddi_dotclock_get(pipe_config);
}

static void hsw_ddi_clock_get(struct intel_encoder *encoder,
                              struct intel_crtc_state *pipe_config)
{
        struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
        int link_clock = 0;
        u32 val, pll;

        val = hsw_pll_to_ddi_pll_sel(pipe_config->shared_dpll);
        switch (val & PORT_CLK_SEL_MASK) {
        case PORT_CLK_SEL_LCPLL_810:
                link_clock = 81000;
                break;
        case PORT_CLK_SEL_LCPLL_1350:
                link_clock = 135000;
                break;
        case PORT_CLK_SEL_LCPLL_2700:
                link_clock = 270000;
                break;
        case PORT_CLK_SEL_WRPLL1:
                link_clock = hsw_ddi_calc_wrpll_link(dev_priv, WRPLL_CTL(0));
                break;
        case PORT_CLK_SEL_WRPLL2:
                link_clock = hsw_ddi_calc_wrpll_link(dev_priv, WRPLL_CTL(1));
                break;
        case PORT_CLK_SEL_SPLL:
                pll = I915_READ(SPLL_CTL) & SPLL_PLL_FREQ_MASK;
                if (pll == SPLL_PLL_FREQ_810MHz)
                        link_clock = 81000;
                else if (pll == SPLL_PLL_FREQ_1350MHz)
                        link_clock = 135000;
                else if (pll == SPLL_PLL_FREQ_2700MHz)
                        link_clock = 270000;
                else {
                        WARN(1, "bad spll freq\n");
                        return;
                }
                break;
        default:
                WARN(1, "bad port clock sel\n");
                return;
        }

        pipe_config->port_clock = link_clock * 2;

        ddi_dotclock_get(pipe_config);
}

static int bxt_calc_pll_link(struct intel_crtc_state *crtc_state)
{
        struct intel_dpll_hw_state *state;
        struct dpll clock;

        /* For DDI ports we always use a shared PLL. */
        if (WARN_ON(!crtc_state->shared_dpll))
                return 0;

        state = &crtc_state->dpll_hw_state;

        clock.m1 = 2;
        clock.m2 = (state->pll0 & PORT_PLL_M2_MASK) << 22;
        if (state->pll3 & PORT_PLL_M2_FRAC_ENABLE)
                clock.m2 |= state->pll2 & PORT_PLL_M2_FRAC_MASK;
        clock.n = (state->pll1 & PORT_PLL_N_MASK) >> PORT_PLL_N_SHIFT;
        clock.p1 = (state->ebb0 & PORT_PLL_P1_MASK) >> PORT_PLL_P1_SHIFT;
        clock.p2 = (state->ebb0 & PORT_PLL_P2_MASK) >> PORT_PLL_P2_SHIFT;

        return chv_calc_dpll_params(100000, &clock);
}

static void bxt_ddi_clock_get(struct intel_encoder *encoder,
                              struct intel_crtc_state *pipe_config)
{
        pipe_config->port_clock = bxt_calc_pll_link(pipe_config);

        ddi_dotclock_get(pipe_config);
}

static void intel_ddi_clock_get(struct intel_encoder *encoder,
                                struct intel_crtc_state *pipe_config)
{
        struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);

        if (INTEL_GEN(dev_priv) <= 8)
                hsw_ddi_clock_get(encoder, pipe_config);
        else if (IS_GEN9_BC(dev_priv))
                skl_ddi_clock_get(encoder, pipe_config);
        else if (IS_GEN9_LP(dev_priv))
                bxt_ddi_clock_get(encoder, pipe_config);
        else if (IS_CANNONLAKE(dev_priv))
                cnl_ddi_clock_get(encoder, pipe_config);
        else if (IS_ICELAKE(dev_priv))
                icl_ddi_clock_get(encoder, pipe_config);
}

void intel_ddi_set_pipe_settings(const struct intel_crtc_state *crtc_state)
{
        struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
        struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
        enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
        u32 temp;

        if (!intel_crtc_has_dp_encoder(crtc_state))
                return;

        WARN_ON(transcoder_is_dsi(cpu_transcoder));

        temp = TRANS_MSA_SYNC_CLK;

        if (crtc_state->limited_color_range)
                temp |= TRANS_MSA_CEA_RANGE;

        switch (crtc_state->pipe_bpp) {
        case 18:
                temp |= TRANS_MSA_6_BPC;
                break;
        case 24:
                temp |= TRANS_MSA_8_BPC;
                break;
        case 30:
                temp |= TRANS_MSA_10_BPC;
                break;
        case 36:
                temp |= TRANS_MSA_12_BPC;
                break;
        default:
                MISSING_CASE(crtc_state->pipe_bpp);
                break;
        }

        I915_WRITE(TRANS_MSA_MISC(cpu_transcoder), temp);
}

void intel_ddi_set_vc_payload_alloc(const struct intel_crtc_state *crtc_state,
                                    bool state)
{
        struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
        struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
        enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
        uint32_t temp;

        temp = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder));
        if (state == true)
                temp |= TRANS_DDI_DP_VC_PAYLOAD_ALLOC;
        else
                temp &= ~TRANS_DDI_DP_VC_PAYLOAD_ALLOC;
        I915_WRITE(TRANS_DDI_FUNC_CTL(cpu_transcoder), temp);
}

void intel_ddi_enable_transcoder_func(const struct intel_crtc_state *crtc_state)
{
        struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
        struct intel_encoder *encoder = intel_ddi_get_crtc_encoder(crtc);
        struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
        enum i915_pipe pipe = crtc->pipe;
        enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
        enum port port = encoder->port;
        uint32_t temp;

        /* Enable TRANS_DDI_FUNC_CTL for the pipe to work in HDMI mode */
        temp = TRANS_DDI_FUNC_ENABLE;
        temp |= TRANS_DDI_SELECT_PORT(port);

        switch (crtc_state->pipe_bpp) {
        case 18:
                temp |= TRANS_DDI_BPC_6;
                break;
        case 24:
                temp |= TRANS_DDI_BPC_8;
                break;
        case 30:
                temp |= TRANS_DDI_BPC_10;
                break;
        case 36:
                temp |= TRANS_DDI_BPC_12;
                break;
        default:
                BUG();
        }

        if (crtc_state->base.adjusted_mode.flags & DRM_MODE_FLAG_PVSYNC)
                temp |= TRANS_DDI_PVSYNC;
        if (crtc_state->base.adjusted_mode.flags & DRM_MODE_FLAG_PHSYNC)
                temp |= TRANS_DDI_PHSYNC;

        if (cpu_transcoder == TRANSCODER_EDP) {
                switch (pipe) {
                case PIPE_A:
                        /* On Haswell, can only use the always-on power well for
                         * eDP when not using the panel fitter, and when not
                         * using motion blur mitigation (which we don't
                         * support). */
                        if (IS_HASWELL(dev_priv) &&
                            (crtc_state->pch_pfit.enabled ||
                             crtc_state->pch_pfit.force_thru))
                                temp |= TRANS_DDI_EDP_INPUT_A_ONOFF;
                        else
                                temp |= TRANS_DDI_EDP_INPUT_A_ON;
                        break;
                case PIPE_B:
                        temp |= TRANS_DDI_EDP_INPUT_B_ONOFF;
                        break;
                case PIPE_C:
                        temp |= TRANS_DDI_EDP_INPUT_C_ONOFF;
                        break;
                default:
                        BUG();
                        break;
                }
        }

        if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_HDMI)) {
                if (crtc_state->has_hdmi_sink)
                        temp |= TRANS_DDI_MODE_SELECT_HDMI;
                else
                        temp |= TRANS_DDI_MODE_SELECT_DVI;

                if (crtc_state->hdmi_scrambling)
                        temp |= TRANS_DDI_HDMI_SCRAMBLING_MASK;
                if (crtc_state->hdmi_high_tmds_clock_ratio)
                        temp |= TRANS_DDI_HIGH_TMDS_CHAR_RATE;
        } else if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_ANALOG)) {
                temp |= TRANS_DDI_MODE_SELECT_FDI;
                temp |= (crtc_state->fdi_lanes - 1) << 1;
        } else if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_DP_MST)) {
                temp |= TRANS_DDI_MODE_SELECT_DP_MST;
                temp |= DDI_PORT_WIDTH(crtc_state->lane_count);
        } else {
                temp |= TRANS_DDI_MODE_SELECT_DP_SST;
                temp |= DDI_PORT_WIDTH(crtc_state->lane_count);
        }

        I915_WRITE(TRANS_DDI_FUNC_CTL(cpu_transcoder), temp);
}

void intel_ddi_disable_transcoder_func(const struct intel_crtc_state *crtc_state)
{
        struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
        struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
        enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
        i915_reg_t reg = TRANS_DDI_FUNC_CTL(cpu_transcoder);
        uint32_t val = I915_READ(reg);

        val &= ~(TRANS_DDI_FUNC_ENABLE | TRANS_DDI_PORT_MASK | TRANS_DDI_DP_VC_PAYLOAD_ALLOC);
        val |= TRANS_DDI_PORT_NONE;
        I915_WRITE(reg, val);

        if (dev_priv->quirks & QUIRK_INCREASE_DDI_DISABLED_TIME &&
            intel_crtc_has_type(crtc_state, INTEL_OUTPUT_HDMI)) {
                DRM_DEBUG_KMS("Quirk Increase DDI disabled time\n");
                /* Quirk time at 100ms for reliable operation */
                msleep(100);
        }
}

int intel_ddi_toggle_hdcp_signalling(struct intel_encoder *intel_encoder,
                                     bool enable)
{
        struct drm_device *dev = intel_encoder->base.dev;
        struct drm_i915_private *dev_priv = to_i915(dev);
        enum i915_pipe pipe = 0;
        int ret = 0;
        uint32_t tmp;

        if (WARN_ON(!intel_display_power_get_if_enabled(dev_priv,
                                                intel_encoder->power_domain)))
                return -ENXIO;

        if (WARN_ON(!intel_encoder->get_hw_state(intel_encoder, &pipe))) {
                ret = -EIO;
                goto out;
        }

        tmp = I915_READ(TRANS_DDI_FUNC_CTL(pipe));
        if (enable)
                tmp |= TRANS_DDI_HDCP_SIGNALLING;
        else
                tmp &= ~TRANS_DDI_HDCP_SIGNALLING;
        I915_WRITE(TRANS_DDI_FUNC_CTL(pipe), tmp);
out:
        intel_display_power_put(dev_priv, intel_encoder->power_domain);
        return ret;
}

bool intel_ddi_connector_get_hw_state(struct intel_connector *intel_connector)
{
        struct drm_device *dev = intel_connector->base.dev;
        struct drm_i915_private *dev_priv = to_i915(dev);
        struct intel_encoder *encoder = intel_connector->encoder;
        int type = intel_connector->base.connector_type;
        enum port port = encoder->port;
        enum i915_pipe pipe = 0;
        enum transcoder cpu_transcoder;
        uint32_t tmp;
        bool ret;

        if (!intel_display_power_get_if_enabled(dev_priv,
                                                encoder->power_domain))
                return false;

        if (!encoder->get_hw_state(encoder, &pipe)) {
                ret = false;
                goto out;
        }

        if (port == PORT_A)
                cpu_transcoder = TRANSCODER_EDP;
        else
                cpu_transcoder = (enum transcoder) pipe;

        tmp = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder));

        switch (tmp & TRANS_DDI_MODE_SELECT_MASK) {
        case TRANS_DDI_MODE_SELECT_HDMI:
        case TRANS_DDI_MODE_SELECT_DVI:
                ret = type == DRM_MODE_CONNECTOR_HDMIA;
                break;

        case TRANS_DDI_MODE_SELECT_DP_SST:
                ret = type == DRM_MODE_CONNECTOR_eDP ||
                      type == DRM_MODE_CONNECTOR_DisplayPort;
                break;

        case TRANS_DDI_MODE_SELECT_DP_MST:
                /* if the transcoder is in MST state then
                 * connector isn't connected */
                ret = false;
                break;

        case TRANS_DDI_MODE_SELECT_FDI:
                ret = type == DRM_MODE_CONNECTOR_VGA;
                break;

        default:
                ret = false;
                break;
        }

out:
        intel_display_power_put(dev_priv, encoder->power_domain);

        return ret;
}

bool intel_ddi_get_hw_state(struct intel_encoder *encoder,
                            enum i915_pipe *pipe)
{
        struct drm_device *dev = encoder->base.dev;
        struct drm_i915_private *dev_priv = to_i915(dev);
        enum port port = encoder->port;
        enum i915_pipe p;
        u32 tmp;
        bool ret;

        if (!intel_display_power_get_if_enabled(dev_priv,
                                                encoder->power_domain))
                return false;

        ret = false;

        tmp = I915_READ(DDI_BUF_CTL(port));

        if (!(tmp & DDI_BUF_CTL_ENABLE))
                goto out;

        if (port == PORT_A) {
                tmp = I915_READ(TRANS_DDI_FUNC_CTL(TRANSCODER_EDP));

                switch (tmp & TRANS_DDI_EDP_INPUT_MASK) {
                case TRANS_DDI_EDP_INPUT_A_ON:
                case TRANS_DDI_EDP_INPUT_A_ONOFF:
                        *pipe = PIPE_A;
                        break;
                case TRANS_DDI_EDP_INPUT_B_ONOFF:
                        *pipe = PIPE_B;
                        break;
                case TRANS_DDI_EDP_INPUT_C_ONOFF:
                        *pipe = PIPE_C;
                        break;
                }

                ret = true;

                goto out;
        }

        for_each_pipe(dev_priv, p) {
                enum transcoder cpu_transcoder = (enum transcoder) p;

                tmp = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder));

                if ((tmp & TRANS_DDI_PORT_MASK) == TRANS_DDI_SELECT_PORT(port)) {
                        if ((tmp & TRANS_DDI_MODE_SELECT_MASK) ==
                            TRANS_DDI_MODE_SELECT_DP_MST)
                                goto out;

                        *pipe = p;
                        ret = true;

                        goto out;
                }
        }

        DRM_DEBUG_KMS("No pipe for ddi port %c found\n", port_name(port));

out:
        if (ret && IS_GEN9_LP(dev_priv)) {
                tmp = I915_READ(BXT_PHY_CTL(port));
                if ((tmp & (BXT_PHY_CMNLANE_POWERDOWN_ACK |
                            BXT_PHY_LANE_POWERDOWN_ACK |
                            BXT_PHY_LANE_ENABLED)) != BXT_PHY_LANE_ENABLED)
                        DRM_ERROR("Port %c enabled but PHY powered down? "
                                  "(PHY_CTL %08x)\n", port_name(port), tmp);
        }

        intel_display_power_put(dev_priv, encoder->power_domain);

        return ret;
}

static inline enum intel_display_power_domain
intel_ddi_main_link_aux_domain(struct intel_dp *intel_dp)
{
        /* CNL+ HW requires corresponding AUX IOs to be powered up for PSR with
         * DC states enabled at the same time, while for driver initiated AUX
         * transfers we need the same AUX IOs to be powered but with DC states
         * disabled. Accordingly use the AUX power domain here which leaves DC
         * states enabled.
         * However, for non-A AUX ports the corresponding non-EDP transcoders
         * would have already enabled power well 2 and DC_OFF. This means we can
         * acquire a wider POWER_DOMAIN_AUX_{B,C,D,F} reference instead of a
         * specific AUX_IO reference without powering up any extra wells.
         * Note that PSR is enabled only on Port A even though this function
         * returns the correct domain for other ports too.
         */
        return intel_dp->aux_ch == AUX_CH_A ? POWER_DOMAIN_AUX_IO_A :
                                              intel_dp->aux_power_domain;
}

static u64 intel_ddi_get_power_domains(struct intel_encoder *encoder,
                                       struct intel_crtc_state *crtc_state)
{
        struct intel_digital_port *dig_port;
        u64 domains;

        /*
         * TODO: Add support for MST encoders. Atm, the following should never
         * happen since fake-MST encoders don't set their get_power_domains()
         * hook.
         */
        if (WARN_ON(intel_crtc_has_type(crtc_state, INTEL_OUTPUT_DP_MST)))
                return 0;

        dig_port = enc_to_dig_port(&encoder->base);
        domains = BIT_ULL(dig_port->ddi_io_power_domain);

        /* AUX power is only needed for (e)DP mode, not for HDMI. */
        if (intel_crtc_has_dp_encoder(crtc_state)) {
                struct intel_dp *intel_dp = &dig_port->dp;

                domains |= BIT_ULL(intel_ddi_main_link_aux_domain(intel_dp));
        }

        return domains;
}

void intel_ddi_enable_pipe_clock(const struct intel_crtc_state *crtc_state)
{
        struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
        struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
        struct intel_encoder *encoder = intel_ddi_get_crtc_encoder(crtc);
        enum port port = encoder->port;
        enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;

        if (cpu_transcoder != TRANSCODER_EDP)
                I915_WRITE(TRANS_CLK_SEL(cpu_transcoder),
                           TRANS_CLK_SEL_PORT(port));
}

void intel_ddi_disable_pipe_clock(const struct intel_crtc_state *crtc_state)
{
        struct drm_i915_private *dev_priv = to_i915(crtc_state->base.crtc->dev);
        enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;

        if (cpu_transcoder != TRANSCODER_EDP)
                I915_WRITE(TRANS_CLK_SEL(cpu_transcoder),
                           TRANS_CLK_SEL_DISABLED);
}

static void _skl_ddi_set_iboost(struct drm_i915_private *dev_priv,
                                enum port port, uint8_t iboost)
{
        u32 tmp;

        tmp = I915_READ(DISPIO_CR_TX_BMU_CR0);
        tmp &= ~(BALANCE_LEG_MASK(port) | BALANCE_LEG_DISABLE(port));
        if (iboost)
                tmp |= iboost << BALANCE_LEG_SHIFT(port);
        else
                tmp |= BALANCE_LEG_DISABLE(port);
        I915_WRITE(DISPIO_CR_TX_BMU_CR0, tmp);
}

static void skl_ddi_set_iboost(struct intel_encoder *encoder,
                               int level, enum intel_output_type type)
{
        struct intel_digital_port *intel_dig_port = enc_to_dig_port(&encoder->base);
        struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
        enum port port = encoder->port;
        uint8_t iboost;

        if (type == INTEL_OUTPUT_HDMI)
                iboost = dev_priv->vbt.ddi_port_info[port].hdmi_boost_level;
        else
                iboost = dev_priv->vbt.ddi_port_info[port].dp_boost_level;

        if (iboost == 0) {
                const struct ddi_buf_trans *ddi_translations;
                int n_entries;

                if (type == INTEL_OUTPUT_HDMI)
                        ddi_translations = intel_ddi_get_buf_trans_hdmi(dev_priv, &n_entries);
                else if (type == INTEL_OUTPUT_EDP)
                        ddi_translations = intel_ddi_get_buf_trans_edp(dev_priv, port, &n_entries);
                else
                        ddi_translations = intel_ddi_get_buf_trans_dp(dev_priv, port, &n_entries);

                if (WARN_ON_ONCE(!ddi_translations))
                        return;
                if (WARN_ON_ONCE(level >= n_entries))
                        level = n_entries - 1;

                iboost = ddi_translations[level].i_boost;
        }

        /* Make sure that the requested I_boost is valid */
        if (iboost && iboost != 0x1 && iboost != 0x3 && iboost != 0x7) {
                DRM_ERROR("Invalid I_boost value %u\n", iboost);
                return;
        }

        _skl_ddi_set_iboost(dev_priv, port, iboost);

        if (port == PORT_A && intel_dig_port->max_lanes == 4)
                _skl_ddi_set_iboost(dev_priv, PORT_E, iboost);
}

static void bxt_ddi_vswing_sequence(struct intel_encoder *encoder,
                                    int level, enum intel_output_type type)
{
        struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
        const struct bxt_ddi_buf_trans *ddi_translations;
        enum port port = encoder->port;
        int n_entries;

        if (type == INTEL_OUTPUT_HDMI)
                ddi_translations = bxt_get_buf_trans_hdmi(dev_priv, &n_entries);
        else if (type == INTEL_OUTPUT_EDP)
                ddi_translations = bxt_get_buf_trans_edp(dev_priv, &n_entries);
        else
                ddi_translations = bxt_get_buf_trans_dp(dev_priv, &n_entries);

        if (WARN_ON_ONCE(!ddi_translations))
                return;
        if (WARN_ON_ONCE(level >= n_entries))
                level = n_entries - 1;

        bxt_ddi_phy_set_signal_level(dev_priv, port,
                                     ddi_translations[level].margin,
                                     ddi_translations[level].scale,
                                     ddi_translations[level].enable,
                                     ddi_translations[level].deemphasis);
}

u8 intel_ddi_dp_voltage_max(struct intel_encoder *encoder)
{
        struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
        enum port port = encoder->port;
        int n_entries;

        if (IS_ICELAKE(dev_priv)) {
                if (intel_port_is_combophy(dev_priv, port))
                        icl_get_combo_buf_trans(dev_priv, port, encoder->type,
                                                &n_entries);
                else
                        n_entries = ARRAY_SIZE(icl_mg_phy_ddi_translations);
        } else if (IS_CANNONLAKE(dev_priv)) {
                if (encoder->type == INTEL_OUTPUT_EDP)
                        cnl_get_buf_trans_edp(dev_priv, &n_entries);
                else
                        cnl_get_buf_trans_dp(dev_priv, &n_entries);
        } else if (IS_GEN9_LP(dev_priv)) {
                if (encoder->type == INTEL_OUTPUT_EDP)
                        bxt_get_buf_trans_edp(dev_priv, &n_entries);
                else
                        bxt_get_buf_trans_dp(dev_priv, &n_entries);
        } else {
                if (encoder->type == INTEL_OUTPUT_EDP)
                        intel_ddi_get_buf_trans_edp(dev_priv, port, &n_entries);
                else
                        intel_ddi_get_buf_trans_dp(dev_priv, port, &n_entries);
        }

        if (WARN_ON(n_entries < 1))
                n_entries = 1;
        if (WARN_ON(n_entries > ARRAY_SIZE(index_to_dp_signal_levels)))
                n_entries = ARRAY_SIZE(index_to_dp_signal_levels);

        return index_to_dp_signal_levels[n_entries - 1] &
                DP_TRAIN_VOLTAGE_SWING_MASK;
}

/*
 * We assume that the full set of pre-emphasis values can be
 * used on all DDI platforms. Should that change we need to
 * rethink this code.
 */
u8 intel_ddi_dp_pre_emphasis_max(struct intel_encoder *encoder, u8 voltage_swing)
{
        switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) {
        case DP_TRAIN_VOLTAGE_SWING_LEVEL_0:
                return DP_TRAIN_PRE_EMPH_LEVEL_3;
        case DP_TRAIN_VOLTAGE_SWING_LEVEL_1:
                return DP_TRAIN_PRE_EMPH_LEVEL_2;
        case DP_TRAIN_VOLTAGE_SWING_LEVEL_2:
                return DP_TRAIN_PRE_EMPH_LEVEL_1;
        case DP_TRAIN_VOLTAGE_SWING_LEVEL_3:
        default:
                return DP_TRAIN_PRE_EMPH_LEVEL_0;
        }
}

static void cnl_ddi_vswing_program(struct intel_encoder *encoder,
                                   int level, enum intel_output_type type)
{
        struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
        const struct cnl_ddi_buf_trans *ddi_translations;
        enum port port = encoder->port;
        int n_entries, ln;
        u32 val;

        if (type == INTEL_OUTPUT_HDMI)
                ddi_translations = cnl_get_buf_trans_hdmi(dev_priv, &n_entries);
        else if (type == INTEL_OUTPUT_EDP)
                ddi_translations = cnl_get_buf_trans_edp(dev_priv, &n_entries);
        else
                ddi_translations = cnl_get_buf_trans_dp(dev_priv, &n_entries);

        if (WARN_ON_ONCE(!ddi_translations))
                return;
        if (WARN_ON_ONCE(level >= n_entries))
                level = n_entries - 1;

        /* Set PORT_TX_DW5 Scaling Mode Sel to 010b. */
        val = I915_READ(CNL_PORT_TX_DW5_LN0(port));
        val &= ~SCALING_MODE_SEL_MASK;
        val |= SCALING_MODE_SEL(2);
        I915_WRITE(CNL_PORT_TX_DW5_GRP(port), val);

        /* Program PORT_TX_DW2 */
        val = I915_READ(CNL_PORT_TX_DW2_LN0(port));
        val &= ~(SWING_SEL_LOWER_MASK | SWING_SEL_UPPER_MASK |
                 RCOMP_SCALAR_MASK);
        val |= SWING_SEL_UPPER(ddi_translations[level].dw2_swing_sel);
        val |= SWING_SEL_LOWER(ddi_translations[level].dw2_swing_sel);
        /* Rcomp scalar is fixed as 0x98 for every table entry */
        val |= RCOMP_SCALAR(0x98);
        I915_WRITE(CNL_PORT_TX_DW2_GRP(port), val);

        /* Program PORT_TX_DW4 */
        /* We cannot write to GRP. It would overrite individual loadgen */
        for (ln = 0; ln < 4; ln++) {
                val = I915_READ(CNL_PORT_TX_DW4_LN(port, ln));
                val &= ~(POST_CURSOR_1_MASK | POST_CURSOR_2_MASK |
                         CURSOR_COEFF_MASK);
                val |= POST_CURSOR_1(ddi_translations[level].dw4_post_cursor_1);
                val |= POST_CURSOR_2(ddi_translations[level].dw4_post_cursor_2);
                val |= CURSOR_COEFF(ddi_translations[level].dw4_cursor_coeff);
                I915_WRITE(CNL_PORT_TX_DW4_LN(port, ln), val);
        }

        /* Program PORT_TX_DW5 */
        /* All DW5 values are fixed for every table entry */
        val = I915_READ(CNL_PORT_TX_DW5_LN0(port));
        val &= ~RTERM_SELECT_MASK;
        val |= RTERM_SELECT(6);
        val |= TAP3_DISABLE;
        I915_WRITE(CNL_PORT_TX_DW5_GRP(port), val);

        /* Program PORT_TX_DW7 */
        val = I915_READ(CNL_PORT_TX_DW7_LN0(port));
        val &= ~N_SCALAR_MASK;
        val |= N_SCALAR(ddi_translations[level].dw7_n_scalar);
        I915_WRITE(CNL_PORT_TX_DW7_GRP(port), val);
}

static void cnl_ddi_vswing_sequence(struct intel_encoder *encoder,
                                    int level, enum intel_output_type type)
{
        struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
        enum port port = encoder->port;
        int width, rate, ln;
        u32 val;

        if (type == INTEL_OUTPUT_HDMI) {
                width = 4;
                rate = 0; /* Rate is always < than 6GHz for HDMI */
        } else {
                struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);

                width = intel_dp->lane_count;
                rate = intel_dp->link_rate;
        }

        /*
         * 1. If port type is eDP or DP,
         * set PORT_PCS_DW1 cmnkeeper_enable to 1b,
         * else clear to 0b.
         */
        val = I915_READ(CNL_PORT_PCS_DW1_LN0(port));
        if (type != INTEL_OUTPUT_HDMI)
                val |= COMMON_KEEPER_EN;
        else
                val &= ~COMMON_KEEPER_EN;
        I915_WRITE(CNL_PORT_PCS_DW1_GRP(port), val);

        /* 2. Program loadgen select */
        /*
         * Program PORT_TX_DW4_LN depending on Bit rate and used lanes
         * <= 6 GHz and 4 lanes (LN0=0, LN1=1, LN2=1, LN3=1)
         * <= 6 GHz and 1,2 lanes (LN0=0, LN1=1, LN2=1, LN3=0)
         * > 6 GHz (LN0=0, LN1=0, LN2=0, LN3=0)
         */
        for (ln = 0; ln <= 3; ln++) {
                val = I915_READ(CNL_PORT_TX_DW4_LN(port, ln));
                val &= ~LOADGEN_SELECT;

                if ((rate <= 600000 && width == 4 && ln >= 1)  ||
                    (rate <= 600000 && width < 4 && (ln == 1 || ln == 2))) {
                        val |= LOADGEN_SELECT;
                }
                I915_WRITE(CNL_PORT_TX_DW4_LN(port, ln), val);
        }

        /* 3. Set PORT_CL_DW5 SUS Clock Config to 11b */
        val = I915_READ(CNL_PORT_CL1CM_DW5);
        val |= SUS_CLOCK_CONFIG;
        I915_WRITE(CNL_PORT_CL1CM_DW5, val);

        /* 4. Clear training enable to change swing values */
        val = I915_READ(CNL_PORT_TX_DW5_LN0(port));
        val &= ~TX_TRAINING_EN;
        I915_WRITE(CNL_PORT_TX_DW5_GRP(port), val);

        /* 5. Program swing and de-emphasis */
        cnl_ddi_vswing_program(encoder, level, type);

        /* 6. Set training enable to trigger update */
        val = I915_READ(CNL_PORT_TX_DW5_LN0(port));
        val |= TX_TRAINING_EN;
        I915_WRITE(CNL_PORT_TX_DW5_GRP(port), val);
}

static void icl_ddi_combo_vswing_program(struct drm_i915_private *dev_priv,
                                         u32 level, enum port port, int type)
{
        const struct icl_combo_phy_ddi_buf_trans *ddi_translations = NULL;
        u32 n_entries, val;
        int ln;

        ddi_translations = icl_get_combo_buf_trans(dev_priv, port, type,
                                                   &n_entries);
        if (!ddi_translations)
                return;

        if (level >= n_entries) {
                DRM_DEBUG_KMS("DDI translation not found for level %d. Using %d instead.", level, n_entries - 1);
                level = n_entries - 1;
        }

        /* Set PORT_TX_DW5 Rterm Sel to 110b. */
        val = I915_READ(ICL_PORT_TX_DW5_LN0(port));
        val &= ~RTERM_SELECT_MASK;
        val |= RTERM_SELECT(0x6);
        I915_WRITE(ICL_PORT_TX_DW5_GRP(port), val);

        /* Program PORT_TX_DW5 */
        val = I915_READ(ICL_PORT_TX_DW5_LN0(port));
        /* Set DisableTap2 and DisableTap3 if MIPI DSI
         * Clear DisableTap2 and DisableTap3 for all other Ports
         */
        if (type == INTEL_OUTPUT_DSI) {
                val |= TAP2_DISABLE;
                val |= TAP3_DISABLE;
        } else {
                val &= ~TAP2_DISABLE;
                val &= ~TAP3_DISABLE;
        }
        I915_WRITE(ICL_PORT_TX_DW5_GRP(port), val);

        /* Program PORT_TX_DW2 */
        val = I915_READ(ICL_PORT_TX_DW2_LN0(port));
        val &= ~(SWING_SEL_LOWER_MASK | SWING_SEL_UPPER_MASK |
                 RCOMP_SCALAR_MASK);
        val |= SWING_SEL_UPPER(ddi_translations[level].dw2_swing_select);
        val |= SWING_SEL_LOWER(ddi_translations[level].dw2_swing_select);
        /* Program Rcomp scalar for every table entry */
        val |= RCOMP_SCALAR(ddi_translations[level].dw2_swing_scalar);
        I915_WRITE(ICL_PORT_TX_DW2_GRP(port), val);

        /* Program PORT_TX_DW4 */
        /* We cannot write to GRP. It would overwrite individual loadgen. */
        for (ln = 0; ln <= 3; ln++) {
                val = I915_READ(ICL_PORT_TX_DW4_LN(port, ln));
                val &= ~(POST_CURSOR_1_MASK | POST_CURSOR_2_MASK |
                         CURSOR_COEFF_MASK);
                val |= ddi_translations[level].dw4_scaling;
                I915_WRITE(ICL_PORT_TX_DW4_LN(port, ln), val);
        }
}

static void icl_combo_phy_ddi_vswing_sequence(struct intel_encoder *encoder,
                                              u32 level,
                                              enum intel_output_type type)
{
        struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
        enum port port = encoder->port;
        int width = 0;
        int rate = 0;
        u32 val;
        int ln = 0;

        if (type == INTEL_OUTPUT_HDMI) {
                width = 4;
                /* Rate is always < than 6GHz for HDMI */
        } else {
                struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);

                width = intel_dp->lane_count;
                rate = intel_dp->link_rate;
        }

        /*
         * 1. If port type is eDP or DP,
         * set PORT_PCS_DW1 cmnkeeper_enable to 1b,
         * else clear to 0b.
         */
        val = I915_READ(ICL_PORT_PCS_DW1_LN0(port));
        if (type == INTEL_OUTPUT_HDMI)
                val &= ~COMMON_KEEPER_EN;
        else
                val |= COMMON_KEEPER_EN;
        I915_WRITE(ICL_PORT_PCS_DW1_GRP(port), val);

        /* 2. Program loadgen select */
        /*
         * Program PORT_TX_DW4_LN depending on Bit rate and used lanes
         * <= 6 GHz and 4 lanes (LN0=0, LN1=1, LN2=1, LN3=1)
         * <= 6 GHz and 1,2 lanes (LN0=0, LN1=1, LN2=1, LN3=0)
         * > 6 GHz (LN0=0, LN1=0, LN2=0, LN3=0)
         */
        for (ln = 0; ln <= 3; ln++) {
                val = I915_READ(ICL_PORT_TX_DW4_LN(port, ln));
                val &= ~LOADGEN_SELECT;

                if ((rate <= 600000 && width == 4 && ln >= 1) ||
                    (rate <= 600000 && width < 4 && (ln == 1 || ln == 2))) {
                        val |= LOADGEN_SELECT;
                }
                I915_WRITE(ICL_PORT_TX_DW4_LN(port, ln), val);
        }

        /* 3. Set PORT_CL_DW5 SUS Clock Config to 11b */
        val = I915_READ(ICL_PORT_CL_DW5(port));
        val |= SUS_CLOCK_CONFIG;
        I915_WRITE(ICL_PORT_CL_DW5(port), val);

        /* 4. Clear training enable to change swing values */
        val = I915_READ(ICL_PORT_TX_DW5_LN0(port));
        val &= ~TX_TRAINING_EN;
        I915_WRITE(ICL_PORT_TX_DW5_GRP(port), val);

        /* 5. Program swing and de-emphasis */
        icl_ddi_combo_vswing_program(dev_priv, level, port, type);

        /* 6. Set training enable to trigger update */
        val = I915_READ(ICL_PORT_TX_DW5_LN0(port));
        val |= TX_TRAINING_EN;
        I915_WRITE(ICL_PORT_TX_DW5_GRP(port), val);
}

static void icl_mg_phy_ddi_vswing_sequence(struct intel_encoder *encoder,
                                           int link_clock,
                                           u32 level)
{
        struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
        enum port port = encoder->port;
        const struct icl_mg_phy_ddi_buf_trans *ddi_translations;
        u32 n_entries, val;
        int ln;

        n_entries = ARRAY_SIZE(icl_mg_phy_ddi_translations);
        ddi_translations = icl_mg_phy_ddi_translations;
        /* The table does not have values for level 3 and level 9. */
        if (level >= n_entries || level == 3 || level == 9) {
                DRM_DEBUG_KMS("DDI translation not found for level %d. Using %d instead.",
                              level, n_entries - 2);
                level = n_entries - 2;
        }

        /* Set MG_TX_LINK_PARAMS cri_use_fs32 to 0. */
        for (ln = 0; ln < 2; ln++) {
                val = I915_READ(MG_TX1_LINK_PARAMS(port, ln));
                val &= ~CRI_USE_FS32;
                I915_WRITE(MG_TX1_LINK_PARAMS(port, ln), val);

                val = I915_READ(MG_TX2_LINK_PARAMS(port, ln));
                val &= ~CRI_USE_FS32;
                I915_WRITE(MG_TX2_LINK_PARAMS(port, ln), val);
        }

        /* Program MG_TX_SWINGCTRL with values from vswing table */
        for (ln = 0; ln < 2; ln++) {
                val = I915_READ(MG_TX1_SWINGCTRL(port, ln));
                val &= ~CRI_TXDEEMPH_OVERRIDE_17_12_MASK;
                val |= CRI_TXDEEMPH_OVERRIDE_17_12(
                        ddi_translations[level].cri_txdeemph_override_17_12);
                I915_WRITE(MG_TX1_SWINGCTRL(port, ln), val);

                val = I915_READ(MG_TX2_SWINGCTRL(port, ln));
                val &= ~CRI_TXDEEMPH_OVERRIDE_17_12_MASK;
                val |= CRI_TXDEEMPH_OVERRIDE_17_12(
                        ddi_translations[level].cri_txdeemph_override_17_12);
                I915_WRITE(MG_TX2_SWINGCTRL(port, ln), val);
        }

        /* Program MG_TX_DRVCTRL with values from vswing table */
        for (ln = 0; ln < 2; ln++) {
                val = I915_READ(MG_TX1_DRVCTRL(port, ln));
                val &= ~(CRI_TXDEEMPH_OVERRIDE_11_6_MASK |
                         CRI_TXDEEMPH_OVERRIDE_5_0_MASK);
                val |= CRI_TXDEEMPH_OVERRIDE_5_0(
                        ddi_translations[level].cri_txdeemph_override_5_0) |
                        CRI_TXDEEMPH_OVERRIDE_11_6(
                                ddi_translations[level].cri_txdeemph_override_11_6) |
                        CRI_TXDEEMPH_OVERRIDE_EN;
                I915_WRITE(MG_TX1_DRVCTRL(port, ln), val);

                val = I915_READ(MG_TX2_DRVCTRL(port, ln));
                val &= ~(CRI_TXDEEMPH_OVERRIDE_11_6_MASK |
                         CRI_TXDEEMPH_OVERRIDE_5_0_MASK);
                val |= CRI_TXDEEMPH_OVERRIDE_5_0(
                        ddi_translations[level].cri_txdeemph_override_5_0) |
                        CRI_TXDEEMPH_OVERRIDE_11_6(
                                ddi_translations[level].cri_txdeemph_override_11_6) |
                        CRI_TXDEEMPH_OVERRIDE_EN;
                I915_WRITE(MG_TX2_DRVCTRL(port, ln), val);

                /* FIXME: Program CRI_LOADGEN_SEL after the spec is updated */
        }

        /*
         * Program MG_CLKHUB<LN, port being used> with value from frequency table
         * In case of Legacy mode on MG PHY, both TX1 and TX2 enabled so use the
         * values from table for which TX1 and TX2 enabled.
         */
        for (ln = 0; ln < 2; ln++) {
                val = I915_READ(MG_CLKHUB(port, ln));
                if (link_clock < 300000)
                        val |= CFG_LOW_RATE_LKREN_EN;
                else
                        val &= ~CFG_LOW_RATE_LKREN_EN;
                I915_WRITE(MG_CLKHUB(port, ln), val);
        }

        /* Program the MG_TX_DCC<LN, port being used> based on the link frequency */
        for (ln = 0; ln < 2; ln++) {
                val = I915_READ(MG_TX1_DCC(port, ln));
                val &= ~CFG_AMI_CK_DIV_OVERRIDE_VAL_MASK;
                if (link_clock <= 500000) {
                        val &= ~CFG_AMI_CK_DIV_OVERRIDE_EN;
                } else {
                        val |= CFG_AMI_CK_DIV_OVERRIDE_EN |
                                CFG_AMI_CK_DIV_OVERRIDE_VAL(1);
                }
                I915_WRITE(MG_TX1_DCC(port, ln), val);

                val = I915_READ(MG_TX2_DCC(port, ln));
                val &= ~CFG_AMI_CK_DIV_OVERRIDE_VAL_MASK;
                if (link_clock <= 500000) {
                        val &= ~CFG_AMI_CK_DIV_OVERRIDE_EN;
                } else {
                        val |= CFG_AMI_CK_DIV_OVERRIDE_EN |
                                CFG_AMI_CK_DIV_OVERRIDE_VAL(1);
                }
                I915_WRITE(MG_TX2_DCC(port, ln), val);
        }

        /* Program MG_TX_PISO_READLOAD with values from vswing table */
        for (ln = 0; ln < 2; ln++) {
                val = I915_READ(MG_TX1_PISO_READLOAD(port, ln));
                val |= CRI_CALCINIT;
                I915_WRITE(MG_TX1_PISO_READLOAD(port, ln), val);

                val = I915_READ(MG_TX2_PISO_READLOAD(port, ln));
                val |= CRI_CALCINIT;
                I915_WRITE(MG_TX2_PISO_READLOAD(port, ln), val);
        }
}

static void icl_ddi_vswing_sequence(struct intel_encoder *encoder,
                                    int link_clock,
                                    u32 level,
                                    enum intel_output_type type)
{
        struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
        enum port port = encoder->port;

        if (intel_port_is_combophy(dev_priv, port))
                icl_combo_phy_ddi_vswing_sequence(encoder, level, type);
        else
                icl_mg_phy_ddi_vswing_sequence(encoder, link_clock, level);
}

static uint32_t translate_signal_level(int signal_levels)
{
        int i;

        for (i = 0; i < ARRAY_SIZE(index_to_dp_signal_levels); i++) {
                if (index_to_dp_signal_levels[i] == signal_levels)
                        return i;
        }

        WARN(1, "Unsupported voltage swing/pre-emphasis level: 0x%x\n",
             signal_levels);

        return 0;
}

static uint32_t intel_ddi_dp_level(struct intel_dp *intel_dp)
{
        uint8_t train_set = intel_dp->train_set[0];
        int signal_levels = train_set & (DP_TRAIN_VOLTAGE_SWING_MASK |
                                         DP_TRAIN_PRE_EMPHASIS_MASK);

        return translate_signal_level(signal_levels);
}

u32 bxt_signal_levels(struct intel_dp *intel_dp)
{
        struct intel_digital_port *dport = dp_to_dig_port(intel_dp);
        struct drm_i915_private *dev_priv = to_i915(dport->base.base.dev);
        struct intel_encoder *encoder = &dport->base;
        int level = intel_ddi_dp_level(intel_dp);

        if (IS_ICELAKE(dev_priv))
                icl_ddi_vswing_sequence(encoder, intel_dp->link_rate,
                                        level, encoder->type);
        else if (IS_CANNONLAKE(dev_priv))
                cnl_ddi_vswing_sequence(encoder, level, encoder->type);
        else
                bxt_ddi_vswing_sequence(encoder, level, encoder->type);

        return 0;
}

uint32_t ddi_signal_levels(struct intel_dp *intel_dp)
{
        struct intel_digital_port *dport = dp_to_dig_port(intel_dp);
        struct drm_i915_private *dev_priv = to_i915(dport->base.base.dev);
        struct intel_encoder *encoder = &dport->base;
        int level = intel_ddi_dp_level(intel_dp);

        if (IS_GEN9_BC(dev_priv))
                skl_ddi_set_iboost(encoder, level, encoder->type);

        return DDI_BUF_TRANS_SELECT(level);
}

static inline
uint32_t icl_dpclka_cfgcr0_clk_off(struct drm_i915_private *dev_priv,
                                   enum port port)
{
        if (intel_port_is_combophy(dev_priv, port)) {
                return ICL_DPCLKA_CFGCR0_DDI_CLK_OFF(port);
        } else if (intel_port_is_tc(dev_priv, port)) {
                enum tc_port tc_port = intel_port_to_tc(dev_priv, port);

                return ICL_DPCLKA_CFGCR0_TC_CLK_OFF(tc_port);
        }

        return 0;
}

void icl_map_plls_to_ports(struct drm_crtc *crtc,
                           struct intel_crtc_state *crtc_state,
                           struct drm_atomic_state *old_state)
{
        struct intel_shared_dpll *pll = crtc_state->shared_dpll;
        struct drm_i915_private *dev_priv = to_i915(crtc->dev);
        struct drm_connector_state *conn_state;
        struct drm_connector *conn;
        int i;

        for_each_new_connector_in_state(old_state, conn, conn_state, i) {
                struct intel_encoder *encoder =
                        to_intel_encoder(conn_state->best_encoder);
                enum port port;
                uint32_t val;

                if (conn_state->crtc != crtc)
                        continue;

                port = encoder->port;
                mutex_lock(&dev_priv->dpll_lock);

                val = I915_READ(DPCLKA_CFGCR0_ICL);
                WARN_ON((val & icl_dpclka_cfgcr0_clk_off(dev_priv, port)) == 0);

                if (intel_port_is_combophy(dev_priv, port)) {
                        val &= ~DPCLKA_CFGCR0_DDI_CLK_SEL_MASK(port);
                        val |= DPCLKA_CFGCR0_DDI_CLK_SEL(pll->info->id, port);
                        I915_WRITE(DPCLKA_CFGCR0_ICL, val);
                        POSTING_READ(DPCLKA_CFGCR0_ICL);
                }

                val &= ~icl_dpclka_cfgcr0_clk_off(dev_priv, port);
                I915_WRITE(DPCLKA_CFGCR0_ICL, val);

                mutex_unlock(&dev_priv->dpll_lock);
        }
}

void icl_unmap_plls_to_ports(struct drm_crtc *crtc,
                             struct intel_crtc_state *crtc_state,
                             struct drm_atomic_state *old_state)
{
        struct drm_i915_private *dev_priv = to_i915(crtc->dev);
        struct drm_connector_state *old_conn_state;
        struct drm_connector *conn;
        int i;

        for_each_old_connector_in_state(old_state, conn, old_conn_state, i) {
                struct intel_encoder *encoder =
                        to_intel_encoder(old_conn_state->best_encoder);
                enum port port;

                if (old_conn_state->crtc != crtc)
                        continue;

                port = encoder->port;
                mutex_lock(&dev_priv->dpll_lock);
                I915_WRITE(DPCLKA_CFGCR0_ICL,
                           I915_READ(DPCLKA_CFGCR0_ICL) |
                           icl_dpclka_cfgcr0_clk_off(dev_priv, port));
                mutex_unlock(&dev_priv->dpll_lock);
        }
}

static void intel_ddi_clk_select(struct intel_encoder *encoder,
                                 const struct intel_shared_dpll *pll)
{
        struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
        enum port port = encoder->port;
        uint32_t val;

        if (WARN_ON(!pll))
                return;

        mutex_lock(&dev_priv->dpll_lock);

        if (IS_ICELAKE(dev_priv)) {
                if (!intel_port_is_combophy(dev_priv, port))
                        I915_WRITE(DDI_CLK_SEL(port),
                                   icl_pll_to_ddi_pll_sel(encoder, pll));
        } else if (IS_CANNONLAKE(dev_priv)) {
                /* Configure DPCLKA_CFGCR0 to map the DPLL to the DDI. */
                val = I915_READ(DPCLKA_CFGCR0);
                val &= ~DPCLKA_CFGCR0_DDI_CLK_SEL_MASK(port);
                val |= DPCLKA_CFGCR0_DDI_CLK_SEL(pll->info->id, port);
                I915_WRITE(DPCLKA_CFGCR0, val);

                /*
                 * Configure DPCLKA_CFGCR0 to turn on the clock for the DDI.
                 * This step and the step before must be done with separate
                 * register writes.
                 */
                val = I915_READ(DPCLKA_CFGCR0);
                val &= ~DPCLKA_CFGCR0_DDI_CLK_OFF(port);
                I915_WRITE(DPCLKA_CFGCR0, val);
        } else if (IS_GEN9_BC(dev_priv)) {
                /* DDI -> PLL mapping  */
                val = I915_READ(DPLL_CTRL2);

                val &= ~(DPLL_CTRL2_DDI_CLK_OFF(port) |
                         DPLL_CTRL2_DDI_CLK_SEL_MASK(port));
                val |= (DPLL_CTRL2_DDI_CLK_SEL(pll->info->id, port) |
                        DPLL_CTRL2_DDI_SEL_OVERRIDE(port));

                I915_WRITE(DPLL_CTRL2, val);

        } else if (INTEL_GEN(dev_priv) < 9) {
                I915_WRITE(PORT_CLK_SEL(port), hsw_pll_to_ddi_pll_sel(pll));
        }

        mutex_unlock(&dev_priv->dpll_lock);
}

static void intel_ddi_clk_disable(struct intel_encoder *encoder)
{
        struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
        enum port port = encoder->port;

        if (IS_ICELAKE(dev_priv)) {
                if (!intel_port_is_combophy(dev_priv, port))
                        I915_WRITE(DDI_CLK_SEL(port), DDI_CLK_SEL_NONE);
        } else if (IS_CANNONLAKE(dev_priv)) {
                I915_WRITE(DPCLKA_CFGCR0, I915_READ(DPCLKA_CFGCR0) |
                           DPCLKA_CFGCR0_DDI_CLK_OFF(port));
        } else if (IS_GEN9_BC(dev_priv)) {
                I915_WRITE(DPLL_CTRL2, I915_READ(DPLL_CTRL2) |
                           DPLL_CTRL2_DDI_CLK_OFF(port));
        } else if (INTEL_GEN(dev_priv) < 9) {
                I915_WRITE(PORT_CLK_SEL(port), PORT_CLK_SEL_NONE);
        }
}

static void intel_ddi_pre_enable_dp(struct intel_encoder *encoder,
                                    const struct intel_crtc_state *crtc_state,
                                    const struct drm_connector_state *conn_state)
{
        struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
        struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
        enum port port = encoder->port;
        struct intel_digital_port *dig_port = enc_to_dig_port(&encoder->base);
        bool is_mst = intel_crtc_has_type(crtc_state, INTEL_OUTPUT_DP_MST);
        int level = intel_ddi_dp_level(intel_dp);

        WARN_ON(is_mst && (port == PORT_A || port == PORT_E));

        intel_display_power_get(dev_priv,
                                intel_ddi_main_link_aux_domain(intel_dp));

        intel_dp_set_link_params(intel_dp, crtc_state->port_clock,
                                 crtc_state->lane_count, is_mst);

        intel_edp_panel_on(intel_dp);

        intel_ddi_clk_select(encoder, crtc_state->shared_dpll);

        intel_display_power_get(dev_priv, dig_port->ddi_io_power_domain);

        icl_program_mg_dp_mode(intel_dp);
        icl_disable_phy_clock_gating(dig_port);

        if (IS_ICELAKE(dev_priv))
                icl_ddi_vswing_sequence(encoder, crtc_state->port_clock,
                                        level, encoder->type);
        else if (IS_CANNONLAKE(dev_priv))
                cnl_ddi_vswing_sequence(encoder, level, encoder->type);
        else if (IS_GEN9_LP(dev_priv))
                bxt_ddi_vswing_sequence(encoder, level, encoder->type);
        else
                intel_prepare_dp_ddi_buffers(encoder, crtc_state);

        intel_ddi_init_dp_buf_reg(encoder);
        if (!is_mst)
                intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
        intel_dp_start_link_train(intel_dp);
        if (port != PORT_A || INTEL_GEN(dev_priv) >= 9)
                intel_dp_stop_link_train(intel_dp);

        icl_enable_phy_clock_gating(dig_port);

        if (!is_mst)
                intel_ddi_enable_pipe_clock(crtc_state);
}

static void intel_ddi_pre_enable_hdmi(struct intel_encoder *encoder,
                                      const struct intel_crtc_state *crtc_state,
                                      const struct drm_connector_state *conn_state)
{
        struct intel_digital_port *intel_dig_port = enc_to_dig_port(&encoder->base);
        struct intel_hdmi *intel_hdmi = &intel_dig_port->hdmi;
        struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
        enum port port = encoder->port;
        int level = intel_ddi_hdmi_level(dev_priv, port);
        struct intel_digital_port *dig_port = enc_to_dig_port(&encoder->base);

        intel_dp_dual_mode_set_tmds_output(intel_hdmi, true);
        intel_ddi_clk_select(encoder, crtc_state->shared_dpll);

        intel_display_power_get(dev_priv, dig_port->ddi_io_power_domain);

        if (IS_ICELAKE(dev_priv))
                icl_ddi_vswing_sequence(encoder, crtc_state->port_clock,
                                        level, INTEL_OUTPUT_HDMI);
        else if (IS_CANNONLAKE(dev_priv))
                cnl_ddi_vswing_sequence(encoder, level, INTEL_OUTPUT_HDMI);
        else if (IS_GEN9_LP(dev_priv))
                bxt_ddi_vswing_sequence(encoder, level, INTEL_OUTPUT_HDMI);
        else
                intel_prepare_hdmi_ddi_buffers(encoder, level);

        if (IS_GEN9_BC(dev_priv))
                skl_ddi_set_iboost(encoder, level, INTEL_OUTPUT_HDMI);

        intel_ddi_enable_pipe_clock(crtc_state);

        intel_dig_port->set_infoframes(&encoder->base,
                                       crtc_state->has_infoframe,
                                       crtc_state, conn_state);
}

static void intel_ddi_pre_enable(struct intel_encoder *encoder,
                                 const struct intel_crtc_state *crtc_state,
                                 const struct drm_connector_state *conn_state)
{
        struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
        struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
        enum i915_pipe pipe = crtc->pipe;

        /*
         * When called from DP MST code:
         * - conn_state will be NULL
         * - encoder will be the main encoder (ie. mst->primary)
         * - the main connector associated with this port
         *   won't be active or linked to a crtc
         * - crtc_state will be the state of the first stream to
         *   be activated on this port, and it may not be the same
         *   stream that will be deactivated last, but each stream
         *   should have a state that is identical when it comes to
         *   the DP link parameteres
         */

        WARN_ON(crtc_state->has_pch_encoder);

        intel_set_cpu_fifo_underrun_reporting(dev_priv, pipe, true);

        if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_HDMI))
                intel_ddi_pre_enable_hdmi(encoder, crtc_state, conn_state);
        else
                intel_ddi_pre_enable_dp(encoder, crtc_state, conn_state);
}

static void intel_disable_ddi_buf(struct intel_encoder *encoder)
{
        struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
        enum port port = encoder->port;
        bool wait = false;
        u32 val;

        val = I915_READ(DDI_BUF_CTL(port));
        if (val & DDI_BUF_CTL_ENABLE) {
                val &= ~DDI_BUF_CTL_ENABLE;
                I915_WRITE(DDI_BUF_CTL(port), val);
                wait = true;
        }

        val = I915_READ(DP_TP_CTL(port));
        val &= ~(DP_TP_CTL_ENABLE | DP_TP_CTL_LINK_TRAIN_MASK);
        val |= DP_TP_CTL_LINK_TRAIN_PAT1;
        I915_WRITE(DP_TP_CTL(port), val);

        if (wait)
                intel_wait_ddi_buf_idle(dev_priv, port);
}

static void intel_ddi_post_disable_dp(struct intel_encoder *encoder,
                                      const struct intel_crtc_state *old_crtc_state,
                                      const struct drm_connector_state *old_conn_state)
{
        struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
        struct intel_digital_port *dig_port = enc_to_dig_port(&encoder->base);
        struct intel_dp *intel_dp = &dig_port->dp;
        bool is_mst = intel_crtc_has_type(old_crtc_state,
                                          INTEL_OUTPUT_DP_MST);

        if (!is_mst) {
                intel_ddi_disable_pipe_clock(old_crtc_state);
                /*
                 * Power down sink before disabling the port, otherwise we end
                 * up getting interrupts from the sink on detecting link loss.
                 */
                intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF);
        }

        intel_disable_ddi_buf(encoder);

        intel_edp_panel_vdd_on(intel_dp);
        intel_edp_panel_off(intel_dp);

        intel_display_power_put(dev_priv, dig_port->ddi_io_power_domain);

        intel_ddi_clk_disable(encoder);

        intel_display_power_put(dev_priv,
                                intel_ddi_main_link_aux_domain(intel_dp));
}

static void intel_ddi_post_disable_hdmi(struct intel_encoder *encoder,
                                        const struct intel_crtc_state *old_crtc_state,
                                        const struct drm_connector_state *old_conn_state)
{
        struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
        struct intel_digital_port *dig_port = enc_to_dig_port(&encoder->base);
        struct intel_hdmi *intel_hdmi = &dig_port->hdmi;

        dig_port->set_infoframes(&encoder->base, false,
                                 old_crtc_state, old_conn_state);

        intel_ddi_disable_pipe_clock(old_crtc_state);

        intel_disable_ddi_buf(encoder);

        intel_display_power_put(dev_priv, dig_port->ddi_io_power_domain);

        intel_ddi_clk_disable(encoder);

        intel_dp_dual_mode_set_tmds_output(intel_hdmi, false);
}

static void intel_ddi_post_disable(struct intel_encoder *encoder,
                                   const struct intel_crtc_state *old_crtc_state,
                                   const struct drm_connector_state *old_conn_state)
{
        /*
         * When called from DP MST code:
         * - old_conn_state will be NULL
         * - encoder will be the main encoder (ie. mst->primary)
         * - the main connector associated with this port
         *   won't be active or linked to a crtc
         * - old_crtc_state will be the state of the last stream to
         *   be deactivated on this port, and it may not be the same
         *   stream that was activated last, but each stream
         *   should have a state that is identical when it comes to
         *   the DP link parameteres
         */

        if (intel_crtc_has_type(old_crtc_state, INTEL_OUTPUT_HDMI))
                intel_ddi_post_disable_hdmi(encoder,
                                            old_crtc_state, old_conn_state);
        else
                intel_ddi_post_disable_dp(encoder,
                                          old_crtc_state, old_conn_state);
}

void intel_ddi_fdi_post_disable(struct intel_encoder *encoder,
                                const struct intel_crtc_state *old_crtc_state,
                                const struct drm_connector_state *old_conn_state)
{
        struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
        uint32_t val;

        /*
         * Bspec lists this as both step 13 (before DDI_BUF_CTL disable)
         * and step 18 (after clearing PORT_CLK_SEL). Based on a BUN,
         * step 13 is the correct place for it. Step 18 is where it was
         * originally before the BUN.
         */
        val = I915_READ(FDI_RX_CTL(PIPE_A));
        val &= ~FDI_RX_ENABLE;
        I915_WRITE(FDI_RX_CTL(PIPE_A), val);

        intel_disable_ddi_buf(encoder);
        intel_ddi_clk_disable(encoder);

        val = I915_READ(FDI_RX_MISC(PIPE_A));
        val &= ~(FDI_RX_PWRDN_LANE1_MASK | FDI_RX_PWRDN_LANE0_MASK);
        val |= FDI_RX_PWRDN_LANE1_VAL(2) | FDI_RX_PWRDN_LANE0_VAL(2);
        I915_WRITE(FDI_RX_MISC(PIPE_A), val);

        val = I915_READ(FDI_RX_CTL(PIPE_A));
        val &= ~FDI_PCDCLK;
        I915_WRITE(FDI_RX_CTL(PIPE_A), val);

        val = I915_READ(FDI_RX_CTL(PIPE_A));
        val &= ~FDI_RX_PLL_ENABLE;
        I915_WRITE(FDI_RX_CTL(PIPE_A), val);
}

static void intel_enable_ddi_dp(struct intel_encoder *encoder,
                                const struct intel_crtc_state *crtc_state,
                                const struct drm_connector_state *conn_state)
{
        struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
        struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
        enum port port = encoder->port;

        if (port == PORT_A && INTEL_GEN(dev_priv) < 9)
                intel_dp_stop_link_train(intel_dp);

        intel_edp_backlight_on(crtc_state, conn_state);
        intel_psr_enable(intel_dp, crtc_state);
        intel_edp_drrs_enable(intel_dp, crtc_state);

        if (crtc_state->has_audio)
                intel_audio_codec_enable(encoder, crtc_state, conn_state);
}

static void intel_enable_ddi_hdmi(struct intel_encoder *encoder,
                                  const struct intel_crtc_state *crtc_state,
                                  const struct drm_connector_state *conn_state)
{
        struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
        struct intel_digital_port *dig_port = enc_to_dig_port(&encoder->base);
        struct drm_connector *connector = conn_state->connector;
        enum port port = encoder->port;

        if (!intel_hdmi_handle_sink_scrambling(encoder, connector,
                                               crtc_state->hdmi_high_tmds_clock_ratio,
                                               crtc_state->hdmi_scrambling))
                DRM_ERROR("[CONNECTOR:%d:%s] Failed to configure sink scrambling/TMDS bit clock ratio\n",
                          connector->base.id, connector->name);

        /* Display WA #1143: skl,kbl,cfl */
        if (IS_GEN9_BC(dev_priv)) {
                /*
                 * For some reason these chicken bits have been
                 * stuffed into a transcoder register, event though
                 * the bits affect a specific DDI port rather than
                 * a specific transcoder.
                 */
                static const enum transcoder port_to_transcoder[] = {
                        [PORT_A] = TRANSCODER_EDP,
                        [PORT_B] = TRANSCODER_A,
                        [PORT_C] = TRANSCODER_B,
                        [PORT_D] = TRANSCODER_C,
                        [PORT_E] = TRANSCODER_A,
                };
                enum transcoder transcoder = port_to_transcoder[port];
                u32 val;

                val = I915_READ(CHICKEN_TRANS(transcoder));

                if (port == PORT_E)
                        val |= DDIE_TRAINING_OVERRIDE_ENABLE |
                                DDIE_TRAINING_OVERRIDE_VALUE;
                else
                        val |= DDI_TRAINING_OVERRIDE_ENABLE |
                                DDI_TRAINING_OVERRIDE_VALUE;

                I915_WRITE(CHICKEN_TRANS(transcoder), val);
                POSTING_READ(CHICKEN_TRANS(transcoder));

                udelay(1);

                if (port == PORT_E)
                        val &= ~(DDIE_TRAINING_OVERRIDE_ENABLE |
                                 DDIE_TRAINING_OVERRIDE_VALUE);
                else
                        val &= ~(DDI_TRAINING_OVERRIDE_ENABLE |
                                 DDI_TRAINING_OVERRIDE_VALUE);

                I915_WRITE(CHICKEN_TRANS(transcoder), val);
        }

        /* In HDMI/DVI mode, the port width, and swing/emphasis values
         * are ignored so nothing special needs to be done besides
         * enabling the port.
         */
        I915_WRITE(DDI_BUF_CTL(port),
                   dig_port->saved_port_bits | DDI_BUF_CTL_ENABLE);

        if (crtc_state->has_audio)
                intel_audio_codec_enable(encoder, crtc_state, conn_state);
}

static void intel_enable_ddi(struct intel_encoder *encoder,
                             const struct intel_crtc_state *crtc_state,
                             const struct drm_connector_state *conn_state)
{
        if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_HDMI))
                intel_enable_ddi_hdmi(encoder, crtc_state, conn_state);
        else
                intel_enable_ddi_dp(encoder, crtc_state, conn_state);

        /* Enable hdcp if it's desired */
        if (conn_state->content_protection ==
            DRM_MODE_CONTENT_PROTECTION_DESIRED)
                intel_hdcp_enable(to_intel_connector(conn_state->connector));
}

static void intel_disable_ddi_dp(struct intel_encoder *encoder,
                                 const struct intel_crtc_state *old_crtc_state,
                                 const struct drm_connector_state *old_conn_state)
{
        struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);

        intel_dp->link_trained = false;

        if (old_crtc_state->has_audio)
                intel_audio_codec_disable(encoder,
                                          old_crtc_state, old_conn_state);

        intel_edp_drrs_disable(intel_dp, old_crtc_state);
        intel_psr_disable(intel_dp, old_crtc_state);
        intel_edp_backlight_off(old_conn_state);
}

static void intel_disable_ddi_hdmi(struct intel_encoder *encoder,
                                   const struct intel_crtc_state *old_crtc_state,
                                   const struct drm_connector_state *old_conn_state)
{
        struct drm_connector *connector = old_conn_state->connector;

        if (old_crtc_state->has_audio)
                intel_audio_codec_disable(encoder,
                                          old_crtc_state, old_conn_state);

        if (!intel_hdmi_handle_sink_scrambling(encoder, connector,
                                               false, false))
                DRM_DEBUG_KMS("[CONNECTOR:%d:%s] Failed to reset sink scrambling/TMDS bit clock ratio\n",
                              connector->base.id, connector->name);
}

static void intel_disable_ddi(struct intel_encoder *encoder,
                              const struct intel_crtc_state *old_crtc_state,
                              const struct drm_connector_state *old_conn_state)
{
        intel_hdcp_disable(to_intel_connector(old_conn_state->connector));

        if (intel_crtc_has_type(old_crtc_state, INTEL_OUTPUT_HDMI))
                intel_disable_ddi_hdmi(encoder, old_crtc_state, old_conn_state);
        else
                intel_disable_ddi_dp(encoder, old_crtc_state, old_conn_state);
}

static void bxt_ddi_pre_pll_enable(struct intel_encoder *encoder,
                                   const struct intel_crtc_state *pipe_config,
                                   const struct drm_connector_state *conn_state)
{
        uint8_t mask = pipe_config->lane_lat_optim_mask;

        bxt_ddi_phy_set_lane_optim_mask(encoder, mask);
}

void intel_ddi_prepare_link_retrain(struct intel_dp *intel_dp)
{
        struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
        struct drm_i915_private *dev_priv =
                to_i915(intel_dig_port->base.base.dev);
        enum port port = intel_dig_port->base.port;
        uint32_t val;
        bool wait = false;

        if (I915_READ(DP_TP_CTL(port)) & DP_TP_CTL_ENABLE) {
                val = I915_READ(DDI_BUF_CTL(port));
                if (val & DDI_BUF_CTL_ENABLE) {
                        val &= ~DDI_BUF_CTL_ENABLE;
                        I915_WRITE(DDI_BUF_CTL(port), val);
                        wait = true;
                }

                val = I915_READ(DP_TP_CTL(port));
                val &= ~(DP_TP_CTL_ENABLE | DP_TP_CTL_LINK_TRAIN_MASK);
                val |= DP_TP_CTL_LINK_TRAIN_PAT1;
                I915_WRITE(DP_TP_CTL(port), val);
                POSTING_READ(DP_TP_CTL(port));

                if (wait)
                        intel_wait_ddi_buf_idle(dev_priv, port);
        }

        val = DP_TP_CTL_ENABLE |
              DP_TP_CTL_LINK_TRAIN_PAT1 | DP_TP_CTL_SCRAMBLE_DISABLE;
        if (intel_dp->link_mst)
                val |= DP_TP_CTL_MODE_MST;
        else {
                val |= DP_TP_CTL_MODE_SST;
                if (drm_dp_enhanced_frame_cap(intel_dp->dpcd))
                        val |= DP_TP_CTL_ENHANCED_FRAME_ENABLE;
        }
        I915_WRITE(DP_TP_CTL(port), val);
        POSTING_READ(DP_TP_CTL(port));

        intel_dp->DP |= DDI_BUF_CTL_ENABLE;
        I915_WRITE(DDI_BUF_CTL(port), intel_dp->DP);
        POSTING_READ(DDI_BUF_CTL(port));

        udelay(600);
}

static bool intel_ddi_is_audio_enabled(struct drm_i915_private *dev_priv,
                                       enum transcoder cpu_transcoder)
{
        if (cpu_transcoder == TRANSCODER_EDP)
                return false;

        if (!intel_display_power_is_enabled(dev_priv, POWER_DOMAIN_AUDIO))
                return false;

        return I915_READ(HSW_AUD_PIN_ELD_CP_VLD) &
                AUDIO_OUTPUT_ENABLE(cpu_transcoder);
}

void intel_ddi_compute_min_voltage_level(struct drm_i915_private *dev_priv,
                                         struct intel_crtc_state *crtc_state)
{
        if (IS_CANNONLAKE(dev_priv) && crtc_state->port_clock > 594000)
                crtc_state->min_voltage_level = 2;
        else if (IS_ICELAKE(dev_priv) && crtc_state->port_clock > 594000)
                crtc_state->min_voltage_level = 1;
}

void intel_ddi_get_config(struct intel_encoder *encoder,
                          struct intel_crtc_state *pipe_config)
{
        struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
        struct intel_crtc *intel_crtc = to_intel_crtc(pipe_config->base.crtc);
        enum transcoder cpu_transcoder = pipe_config->cpu_transcoder;
        struct intel_digital_port *intel_dig_port;
        u32 temp, flags = 0;

        /* XXX: DSI transcoder paranoia */
        if (WARN_ON(transcoder_is_dsi(cpu_transcoder)))
                return;

        temp = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder));
        if (temp & TRANS_DDI_PHSYNC)
                flags |= DRM_MODE_FLAG_PHSYNC;
        else
                flags |= DRM_MODE_FLAG_NHSYNC;
        if (temp & TRANS_DDI_PVSYNC)
                flags |= DRM_MODE_FLAG_PVSYNC;
        else
                flags |= DRM_MODE_FLAG_NVSYNC;

        pipe_config->base.adjusted_mode.flags |= flags;

        switch (temp & TRANS_DDI_BPC_MASK) {
        case TRANS_DDI_BPC_6:
                pipe_config->pipe_bpp = 18;
                break;
        case TRANS_DDI_BPC_8:
                pipe_config->pipe_bpp = 24;
                break;
        case TRANS_DDI_BPC_10:
                pipe_config->pipe_bpp = 30;
                break;
        case TRANS_DDI_BPC_12:
                pipe_config->pipe_bpp = 36;
                break;
        default:
                break;
        }

        switch (temp & TRANS_DDI_MODE_SELECT_MASK) {
        case TRANS_DDI_MODE_SELECT_HDMI:
                pipe_config->has_hdmi_sink = true;
                intel_dig_port = enc_to_dig_port(&encoder->base);

                if (intel_dig_port->infoframe_enabled(&encoder->base, pipe_config))
                        pipe_config->has_infoframe = true;

                if ((temp & TRANS_DDI_HDMI_SCRAMBLING_MASK) ==
                        TRANS_DDI_HDMI_SCRAMBLING_MASK)
                        pipe_config->hdmi_scrambling = true;
                if (temp & TRANS_DDI_HIGH_TMDS_CHAR_RATE)
                        pipe_config->hdmi_high_tmds_clock_ratio = true;
                /* fall through */
        case TRANS_DDI_MODE_SELECT_DVI:
                pipe_config->output_types |= BIT(INTEL_OUTPUT_HDMI);
                pipe_config->lane_count = 4;
                break;
        case TRANS_DDI_MODE_SELECT_FDI:
                pipe_config->output_types |= BIT(INTEL_OUTPUT_ANALOG);
                break;
        case TRANS_DDI_MODE_SELECT_DP_SST:
                if (encoder->type == INTEL_OUTPUT_EDP)
                        pipe_config->output_types |= BIT(INTEL_OUTPUT_EDP);
                else
                        pipe_config->output_types |= BIT(INTEL_OUTPUT_DP);
                pipe_config->lane_count =
                        ((temp & DDI_PORT_WIDTH_MASK) >> DDI_PORT_WIDTH_SHIFT) + 1;
                intel_dp_get_m_n(intel_crtc, pipe_config);
                break;
        case TRANS_DDI_MODE_SELECT_DP_MST:
                pipe_config->output_types |= BIT(INTEL_OUTPUT_DP_MST);
                pipe_config->lane_count =
                        ((temp & DDI_PORT_WIDTH_MASK) >> DDI_PORT_WIDTH_SHIFT) + 1;
                intel_dp_get_m_n(intel_crtc, pipe_config);
                break;
        default:
                break;
        }

        pipe_config->has_audio =
                intel_ddi_is_audio_enabled(dev_priv, cpu_transcoder);

        if (encoder->type == INTEL_OUTPUT_EDP && dev_priv->vbt.edp.bpp &&
            pipe_config->pipe_bpp > dev_priv->vbt.edp.bpp) {
                /*
                 * This is a big fat ugly hack.
                 *
                 * Some machines in UEFI boot mode provide us a VBT that has 18
                 * bpp and 1.62 GHz link bandwidth for eDP, which for reasons
                 * unknown we fail to light up. Yet the same BIOS boots up with
                 * 24 bpp and 2.7 GHz link. Use the same bpp as the BIOS uses as
                 * max, not what it tells us to use.
                 *
                 * Note: This will still be broken if the eDP panel is not lit
                 * up by the BIOS, and thus we can't get the mode at module
                 * load.
                 */
                DRM_DEBUG_KMS("pipe has %d bpp for eDP panel, overriding BIOS-provided max %d bpp\n",
                              pipe_config->pipe_bpp, dev_priv->vbt.edp.bpp);
                dev_priv->vbt.edp.bpp = pipe_config->pipe_bpp;
        }

        intel_ddi_clock_get(encoder, pipe_config);

        if (IS_GEN9_LP(dev_priv))
                pipe_config->lane_lat_optim_mask =
                        bxt_ddi_phy_get_lane_lat_optim_mask(encoder);

        intel_ddi_compute_min_voltage_level(dev_priv, pipe_config);
}

static enum intel_output_type
intel_ddi_compute_output_type(struct intel_encoder *encoder,
                              struct intel_crtc_state *crtc_state,
                              struct drm_connector_state *conn_state)
{
        switch (conn_state->connector->connector_type) {
        case DRM_MODE_CONNECTOR_HDMIA:
                return INTEL_OUTPUT_HDMI;
        case DRM_MODE_CONNECTOR_eDP:
                return INTEL_OUTPUT_EDP;
        case DRM_MODE_CONNECTOR_DisplayPort:
                return INTEL_OUTPUT_DP;
        default:
                MISSING_CASE(conn_state->connector->connector_type);
                return INTEL_OUTPUT_UNUSED;
        }
}

static bool intel_ddi_compute_config(struct intel_encoder *encoder,
                                     struct intel_crtc_state *pipe_config,
                                     struct drm_connector_state *conn_state)
{
        struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
        enum port port = encoder->port;
        int ret;

        if (port == PORT_A)
                pipe_config->cpu_transcoder = TRANSCODER_EDP;

        if (intel_crtc_has_type(pipe_config, INTEL_OUTPUT_HDMI))
                ret = intel_hdmi_compute_config(encoder, pipe_config, conn_state);
        else
                ret = intel_dp_compute_config(encoder, pipe_config, conn_state);

        if (IS_GEN9_LP(dev_priv) && ret)
                pipe_config->lane_lat_optim_mask =
                        bxt_ddi_phy_calc_lane_lat_optim_mask(pipe_config->lane_count);

        intel_ddi_compute_min_voltage_level(dev_priv, pipe_config);

        return ret;

}

static const struct drm_encoder_funcs intel_ddi_funcs = {
        .reset = intel_dp_encoder_reset,
        .destroy = intel_dp_encoder_destroy,
};

static struct intel_connector *
intel_ddi_init_dp_connector(struct intel_digital_port *intel_dig_port)
{
        struct intel_connector *connector;
        enum port port = intel_dig_port->base.port;

        connector = intel_connector_alloc();
        if (!connector)
                return NULL;

        intel_dig_port->dp.output_reg = DDI_BUF_CTL(port);
        if (!intel_dp_init_connector(intel_dig_port, connector)) {
                kfree(connector);
                return NULL;
        }

        return connector;
}

static int modeset_pipe(struct drm_crtc *crtc,
                        struct drm_modeset_acquire_ctx *ctx)
{
        struct drm_atomic_state *state;
        struct drm_crtc_state *crtc_state;
        int ret;

        state = drm_atomic_state_alloc(crtc->dev);
        if (!state)
                return -ENOMEM;

        state->acquire_ctx = ctx;

        crtc_state = drm_atomic_get_crtc_state(state, crtc);
        if (IS_ERR(crtc_state)) {
                ret = PTR_ERR(crtc_state);
                goto out;
        }

        crtc_state->mode_changed = true;

        ret = drm_atomic_add_affected_connectors(state, crtc);
        if (ret)
                goto out;

        ret = drm_atomic_add_affected_planes(state, crtc);
        if (ret)
                goto out;

        ret = drm_atomic_commit(state);
        if (ret)
                goto out;

        return 0;

 out:
        drm_atomic_state_put(state);

        return ret;
}

static int intel_hdmi_reset_link(struct intel_encoder *encoder,
                                 struct drm_modeset_acquire_ctx *ctx)
{
        struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
        struct intel_hdmi *hdmi = enc_to_intel_hdmi(&encoder->base);
        struct intel_connector *connector = hdmi->attached_connector;
        struct i2c_adapter *adapter =
                intel_gmbus_get_adapter(dev_priv, hdmi->ddc_bus);
        struct drm_connector_state *conn_state;
        struct intel_crtc_state *crtc_state;
        struct intel_crtc *crtc;
        u8 config;
        int ret;

        if (!connector || connector->base.status != connector_status_connected)
                return 0;

        ret = drm_modeset_lock(&dev_priv->drm.mode_config.connection_mutex,
                               ctx);
        if (ret)
                return ret;

        conn_state = connector->base.state;

        crtc = to_intel_crtc(conn_state->crtc);
        if (!crtc)
                return 0;

        ret = drm_modeset_lock(&crtc->base.mutex, ctx);
        if (ret)
                return ret;

        crtc_state = to_intel_crtc_state(crtc->base.state);

        WARN_ON(!intel_crtc_has_type(crtc_state, INTEL_OUTPUT_HDMI));

        if (!crtc_state->base.active)
                return 0;

        if (!crtc_state->hdmi_high_tmds_clock_ratio &&
            !crtc_state->hdmi_scrambling)
                return 0;

        if (conn_state->commit &&
            !try_wait_for_completion(&conn_state->commit->hw_done))
                return 0;

        ret = drm_scdc_readb(adapter, SCDC_TMDS_CONFIG, &config);
        if (ret < 0) {
                DRM_ERROR("Failed to read TMDS config: %d\n", ret);
                return 0;
        }

        if (!!(config & SCDC_TMDS_BIT_CLOCK_RATIO_BY_40) ==
            crtc_state->hdmi_high_tmds_clock_ratio &&
            !!(config & SCDC_SCRAMBLING_ENABLE) ==
            crtc_state->hdmi_scrambling)
                return 0;

        /*
         * HDMI 2.0 says that one should not send scrambled data
         * prior to configuring the sink scrambling, and that
         * TMDS clock/data transmission should be suspended when
         * changing the TMDS clock rate in the sink. So let's
         * just do a full modeset here, even though some sinks
         * would be perfectly happy if were to just reconfigure
         * the SCDC settings on the fly.
         */
        return modeset_pipe(&crtc->base, ctx);
}

static bool intel_ddi_hotplug(struct intel_encoder *encoder,
                              struct intel_connector *connector)
{
        struct drm_modeset_acquire_ctx ctx;
        bool changed;
        int ret;

        changed = intel_encoder_hotplug(encoder, connector);

        drm_modeset_acquire_init(&ctx, 0);

        for (;;) {
                if (connector->base.connector_type == DRM_MODE_CONNECTOR_HDMIA)
                        ret = intel_hdmi_reset_link(encoder, &ctx);
                else
                        ret = intel_dp_retrain_link(encoder, &ctx);

                if (ret == -EDEADLK) {
                        drm_modeset_backoff(&ctx);
                        continue;
                }

                break;
        }

        drm_modeset_drop_locks(&ctx);
        drm_modeset_acquire_fini(&ctx);
        WARN(ret, "Acquiring modeset locks failed with %i\n", ret);

        return changed;
}

static struct intel_connector *
intel_ddi_init_hdmi_connector(struct intel_digital_port *intel_dig_port)
{
        struct intel_connector *connector;
        enum port port = intel_dig_port->base.port;

        connector = intel_connector_alloc();
        if (!connector)
                return NULL;

        intel_dig_port->hdmi.hdmi_reg = DDI_BUF_CTL(port);
        intel_hdmi_init_connector(intel_dig_port, connector);

        return connector;
}

static bool intel_ddi_a_force_4_lanes(struct intel_digital_port *dport)
{
        struct drm_i915_private *dev_priv = to_i915(dport->base.base.dev);

        if (dport->base.port != PORT_A)
                return false;

        if (dport->saved_port_bits & DDI_A_4_LANES)
                return false;

        /* Broxton/Geminilake: Bspec says that DDI_A_4_LANES is the only
         *                     supported configuration
         */
        if (IS_GEN9_LP(dev_priv))
                return true;

        /* Cannonlake: Most of SKUs don't support DDI_E, and the only
         *             one who does also have a full A/E split called
         *             DDI_F what makes DDI_E useless. However for this
         *             case let's trust VBT info.
         */
        if (IS_CANNONLAKE(dev_priv) &&
            !intel_bios_is_port_present(dev_priv, PORT_E))
                return true;

        return false;
}

static int
intel_ddi_max_lanes(struct intel_digital_port *intel_dport)
{
        struct drm_i915_private *dev_priv = to_i915(intel_dport->base.base.dev);
        enum port port = intel_dport->base.port;
        int max_lanes = 4;

        if (INTEL_GEN(dev_priv) >= 11)
                return max_lanes;

        if (port == PORT_A || port == PORT_E) {
                if (I915_READ(DDI_BUF_CTL(PORT_A)) & DDI_A_4_LANES)
                        max_lanes = port == PORT_A ? 4 : 0;
                else
                        /* Both A and E share 2 lanes */
                        max_lanes = 2;
        }

        /*
         * Some BIOS might fail to set this bit on port A if eDP
         * wasn't lit up at boot.  Force this bit set when needed
         * so we use the proper lane count for our calculations.
         */
        if (intel_ddi_a_force_4_lanes(intel_dport)) {
                DRM_DEBUG_KMS("Forcing DDI_A_4_LANES for port A\n");
                intel_dport->saved_port_bits |= DDI_A_4_LANES;
                max_lanes = 4;
        }

        return max_lanes;
}

void intel_ddi_init(struct drm_i915_private *dev_priv, enum port port)
{
        struct intel_digital_port *intel_dig_port;
        struct intel_encoder *intel_encoder;
        struct drm_encoder *encoder;
        bool init_hdmi, init_dp, init_lspcon = false;


        init_hdmi = (dev_priv->vbt.ddi_port_info[port].supports_dvi ||
                     dev_priv->vbt.ddi_port_info[port].supports_hdmi);
        init_dp = dev_priv->vbt.ddi_port_info[port].supports_dp;

        if (intel_bios_is_lspcon_present(dev_priv, port)) {
                /*
                 * Lspcon device needs to be driven with DP connector
                 * with special detection sequence. So make sure DP
                 * is initialized before lspcon.
                 */
                init_dp = true;
                init_lspcon = true;
                init_hdmi = false;
                DRM_DEBUG_KMS("VBT says port %c has lspcon\n", port_name(port));
        }

        if (!init_dp && !init_hdmi) {
                DRM_DEBUG_KMS("VBT says port %c is not DVI/HDMI/DP compatible, respect it\n",
                              port_name(port));
                return;
        }

        intel_dig_port = kzalloc(sizeof(*intel_dig_port), GFP_KERNEL);
        if (!intel_dig_port)
                return;

        intel_encoder = &intel_dig_port->base;
        encoder = &intel_encoder->base;

        drm_encoder_init(&dev_priv->drm, encoder, &intel_ddi_funcs,
                         DRM_MODE_ENCODER_TMDS, "DDI %c", port_name(port));

        intel_encoder->hotplug = intel_ddi_hotplug;
        intel_encoder->compute_output_type = intel_ddi_compute_output_type;
        intel_encoder->compute_config = intel_ddi_compute_config;
        intel_encoder->enable = intel_enable_ddi;
        if (IS_GEN9_LP(dev_priv))
                intel_encoder->pre_pll_enable = bxt_ddi_pre_pll_enable;
        intel_encoder->pre_enable = intel_ddi_pre_enable;
        intel_encoder->disable = intel_disable_ddi;
        intel_encoder->post_disable = intel_ddi_post_disable;
        intel_encoder->get_hw_state = intel_ddi_get_hw_state;
        intel_encoder->get_config = intel_ddi_get_config;
        intel_encoder->suspend = intel_dp_encoder_suspend;
        intel_encoder->get_power_domains = intel_ddi_get_power_domains;
        intel_encoder->type = INTEL_OUTPUT_DDI;
        intel_encoder->power_domain = intel_port_to_power_domain(port);
        intel_encoder->port = port;
        intel_encoder->crtc_mask = (1 << 0) | (1 << 1) | (1 << 2);
        intel_encoder->cloneable = 0;

        if (INTEL_GEN(dev_priv) >= 11)
                intel_dig_port->saved_port_bits = I915_READ(DDI_BUF_CTL(port)) &
                        DDI_BUF_PORT_REVERSAL;
        else
                intel_dig_port->saved_port_bits = I915_READ(DDI_BUF_CTL(port)) &
                        (DDI_BUF_PORT_REVERSAL | DDI_A_4_LANES);
        intel_dig_port->dp.output_reg = INVALID_MMIO_REG;
        intel_dig_port->max_lanes = intel_ddi_max_lanes(intel_dig_port);

        switch (port) {
        case PORT_A:
                intel_dig_port->ddi_io_power_domain =
                        POWER_DOMAIN_PORT_DDI_A_IO;
                break;
        case PORT_B:
                intel_dig_port->ddi_io_power_domain =
                        POWER_DOMAIN_PORT_DDI_B_IO;
                break;
        case PORT_C:
                intel_dig_port->ddi_io_power_domain =
                        POWER_DOMAIN_PORT_DDI_C_IO;
                break;
        case PORT_D:
                intel_dig_port->ddi_io_power_domain =
                        POWER_DOMAIN_PORT_DDI_D_IO;
                break;
        case PORT_E:
                intel_dig_port->ddi_io_power_domain =
                        POWER_DOMAIN_PORT_DDI_E_IO;
                break;
        case PORT_F:
                intel_dig_port->ddi_io_power_domain =
                        POWER_DOMAIN_PORT_DDI_F_IO;
                break;
        default:
                MISSING_CASE(port);
        }

        intel_infoframe_init(intel_dig_port);

        if (init_dp) {
                if (!intel_ddi_init_dp_connector(intel_dig_port))
                        goto err;

                intel_dig_port->hpd_pulse = intel_dp_hpd_pulse;
        }

        /* In theory we don't need the encoder->type check, but leave it just in
         * case we have some really bad VBTs... */
        if (intel_encoder->type != INTEL_OUTPUT_EDP && init_hdmi) {
                if (!intel_ddi_init_hdmi_connector(intel_dig_port))
                        goto err;
        }

        if (init_lspcon) {
                if (lspcon_init(intel_dig_port))
                        /* TODO: handle hdmi info frame part */
                        DRM_DEBUG_KMS("LSPCON init success on port %c\n",
                                port_name(port));
                else
                        /*
                         * LSPCON init faied, but DP init was success, so
                         * lets try to drive as DP++ port.
                         */
                        DRM_ERROR("LSPCON init failed on port %c\n",
                                port_name(port));
        }

        return;

err:
        drm_encoder_cleanup(encoder);
        kfree(intel_dig_port);
}