/*
 * Copyright © 2012-2016 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.
 *
 */

#ifndef _INTEL_DPLL_MGR_H_
#define _INTEL_DPLL_MGR_H_

#include <linux/types.h>

#include "intel_display_power.h"

#define for_each_dpll(__display, __pll, __i) \
        for ((__i) = 0; (__i) < (__display)->dpll.num_dpll && \
                     ((__pll) = &(__display)->dpll.dplls[(__i)]) ; (__i)++)

enum tc_port;
struct drm_printer;
struct intel_atomic_state;
struct intel_crtc;
struct intel_crtc_state;
struct intel_dpll_funcs;
struct intel_encoder;
struct intel_shared_dpll;
struct ref_tracker;

/**
 * enum intel_dpll_id - possible DPLL ids
 *
 * Enumeration of possible IDs for a DPLL. Real shared dpll ids must be >= 0.
 */
enum intel_dpll_id {
        /**
         * @DPLL_ID_PRIVATE: non-shared dpll in use
         */
        DPLL_ID_PRIVATE = -1,

        /**
         * @DPLL_ID_PCH_PLL_A: DPLL A in ILK, SNB and IVB
         */
        DPLL_ID_PCH_PLL_A = 0,
        /**
         * @DPLL_ID_PCH_PLL_B: DPLL B in ILK, SNB and IVB
         */
        DPLL_ID_PCH_PLL_B = 1,


        /**
         * @DPLL_ID_WRPLL1: HSW and BDW WRPLL1
         */
        DPLL_ID_WRPLL1 = 0,
        /**
         * @DPLL_ID_WRPLL2: HSW and BDW WRPLL2
         */
        DPLL_ID_WRPLL2 = 1,
        /**
         * @DPLL_ID_SPLL: HSW and BDW SPLL
         */
        DPLL_ID_SPLL = 2,
        /**
         * @DPLL_ID_LCPLL_810: HSW and BDW 0.81 GHz LCPLL
         */
        DPLL_ID_LCPLL_810 = 3,
        /**
         * @DPLL_ID_LCPLL_1350: HSW and BDW 1.35 GHz LCPLL
         */
        DPLL_ID_LCPLL_1350 = 4,
        /**
         * @DPLL_ID_LCPLL_2700: HSW and BDW 2.7 GHz LCPLL
         */
        DPLL_ID_LCPLL_2700 = 5,


        /**
         * @DPLL_ID_SKL_DPLL0: SKL and later DPLL0
         */
        DPLL_ID_SKL_DPLL0 = 0,
        /**
         * @DPLL_ID_SKL_DPLL1: SKL and later DPLL1
         */
        DPLL_ID_SKL_DPLL1 = 1,
        /**
         * @DPLL_ID_SKL_DPLL2: SKL and later DPLL2
         */
        DPLL_ID_SKL_DPLL2 = 2,
        /**
         * @DPLL_ID_SKL_DPLL3: SKL and later DPLL3
         */
        DPLL_ID_SKL_DPLL3 = 3,


        /**
         * @DPLL_ID_ICL_DPLL0: ICL/TGL combo PHY DPLL0
         */
        DPLL_ID_ICL_DPLL0 = 0,
        /**
         * @DPLL_ID_ICL_DPLL1: ICL/TGL combo PHY DPLL1
         */
        DPLL_ID_ICL_DPLL1 = 1,
        /**
         * @DPLL_ID_EHL_DPLL4: EHL combo PHY DPLL4
         */
        DPLL_ID_EHL_DPLL4 = 2,
        /**
         * @DPLL_ID_ICL_TBTPLL: ICL/TGL TBT PLL
         */
        DPLL_ID_ICL_TBTPLL = 2,
        /**
         * @DPLL_ID_ICL_MGPLL1: ICL MG PLL 1 port 1 (C),
         *                      TGL TC PLL 1 port 1 (TC1)
         */
        DPLL_ID_ICL_MGPLL1 = 3,
        /**
         * @DPLL_ID_ICL_MGPLL2: ICL MG PLL 1 port 2 (D)
         *                      TGL TC PLL 1 port 2 (TC2)
         */
        DPLL_ID_ICL_MGPLL2 = 4,
        /**
         * @DPLL_ID_ICL_MGPLL3: ICL MG PLL 1 port 3 (E)
         *                      TGL TC PLL 1 port 3 (TC3)
         */
        DPLL_ID_ICL_MGPLL3 = 5,
        /**
         * @DPLL_ID_ICL_MGPLL4: ICL MG PLL 1 port 4 (F)
         *                      TGL TC PLL 1 port 4 (TC4)
         */
        DPLL_ID_ICL_MGPLL4 = 6,
        /**
         * @DPLL_ID_TGL_MGPLL5: TGL TC PLL port 5 (TC5)
         */
        DPLL_ID_TGL_MGPLL5 = 7,
        /**
         * @DPLL_ID_TGL_MGPLL6: TGL TC PLL port 6 (TC6)
         */
        DPLL_ID_TGL_MGPLL6 = 8,

        /**
         * @DPLL_ID_DG1_DPLL0: DG1 combo PHY DPLL0
         */
        DPLL_ID_DG1_DPLL0 = 0,
        /**
         * @DPLL_ID_DG1_DPLL1: DG1 combo PHY DPLL1
         */
        DPLL_ID_DG1_DPLL1 = 1,
        /**
         * @DPLL_ID_DG1_DPLL2: DG1 combo PHY DPLL2
         */
        DPLL_ID_DG1_DPLL2 = 2,
        /**
         * @DPLL_ID_DG1_DPLL3: DG1 combo PHY DPLL3
         */
        DPLL_ID_DG1_DPLL3 = 3,
};

#define I915_NUM_PLLS 9

enum icl_port_dpll_id {
        ICL_PORT_DPLL_DEFAULT,
        ICL_PORT_DPLL_MG_PHY,

        ICL_PORT_DPLL_COUNT,
};

struct i9xx_dpll_hw_state {
        u32 dpll;
        u32 dpll_md;
        u32 fp0;
        u32 fp1;
};

struct hsw_dpll_hw_state {
        u32 wrpll;
        u32 spll;
};

struct skl_dpll_hw_state {
        /*
         * DPLL_CTRL1 has 6 bits for each each this DPLL. We store those in
         * lower part of ctrl1 and they get shifted into position when writing
         * the register.  This allows us to easily compare the state to share
         * the DPLL.
         */
        u32 ctrl1;
        /* HDMI only, 0 when used for DP */
        u32 cfgcr1, cfgcr2;
};

struct bxt_dpll_hw_state {
        u32 ebb0, ebb4, pll0, pll1, pll2, pll3, pll6, pll8, pll9, pll10, pcsdw12;
};

struct icl_dpll_hw_state {
        u32 cfgcr0, cfgcr1;

        /* tgl */
        u32 div0;

        u32 mg_refclkin_ctl;
        u32 mg_clktop2_coreclkctl1;
        u32 mg_clktop2_hsclkctl;
        u32 mg_pll_div0;
        u32 mg_pll_div1;
        u32 mg_pll_lf;
        u32 mg_pll_frac_lock;
        u32 mg_pll_ssc;
        u32 mg_pll_bias;
        u32 mg_pll_tdc_coldst_bias;
        u32 mg_pll_bias_mask;
        u32 mg_pll_tdc_coldst_bias_mask;
};

struct intel_mpllb_state {
        u32 clock; /* in KHz */
        u32 ref_control;
        u32 mpllb_cp;
        u32 mpllb_div;
        u32 mpllb_div2;
        u32 mpllb_fracn1;
        u32 mpllb_fracn2;
        u32 mpllb_sscen;
        u32 mpllb_sscstep;
};

struct intel_c10pll_state {
        u32 clock; /* in KHz */
        u8 tx;
        u8 cmn;
        u8 pll[20];
};

struct intel_c20pll_state {
        u32 clock; /* in kHz */
        u16 tx[3];
        u16 cmn[4];
        union {
                u16 mplla[10];
                u16 mpllb[11];
        };
        struct intel_c20pll_vdr_state {
                u8 custom_width;
                u8 serdes_rate;
                u8 hdmi_rate;
        } vdr;
};

struct intel_cx0pll_state {
        union {
                struct intel_c10pll_state c10;
                struct intel_c20pll_state c20;
        };
        int lane_count;
        bool ssc_enabled;
        bool use_c10;
        bool tbt_mode;
};

struct intel_lt_phy_pll_state {
        u32 clock; /* in kHz */
        u8 addr_msb[13];
        u8 addr_lsb[13];
        u8 data[13][4];
        u8 config[3];
        bool ssc_enabled;
        bool tbt_mode;
};

struct intel_dpll_hw_state {
        union {
                struct i9xx_dpll_hw_state i9xx;
                struct hsw_dpll_hw_state hsw;
                struct skl_dpll_hw_state skl;
                struct bxt_dpll_hw_state bxt;
                struct icl_dpll_hw_state icl;
                struct intel_mpllb_state mpllb;
                struct intel_cx0pll_state cx0pll;
                struct intel_lt_phy_pll_state ltpll;
        };
};

/**
 * struct intel_dpll_state - hold the DPLL atomic state
 *
 * This structure holds an atomic state for the DPLL, that can represent
 * either its current state (in struct &intel_shared_dpll) or a desired
 * future state which would be applied by an atomic mode set (stored in
 * a struct &intel_atomic_state).
 *
 * See also intel_reserve_shared_dplls() and intel_release_shared_dplls().
 */
struct intel_dpll_state {
        /**
         * @pipe_mask: mask of pipes using this DPLL, active or not
         */
        u8 pipe_mask;

        /**
         * @hw_state: hardware configuration for the DPLL stored in
         * struct &intel_dpll_hw_state.
         */
        struct intel_dpll_hw_state hw_state;
};

/**
 * struct dpll_info - display PLL platform specific info
 */
struct dpll_info {
        /**
         * @name: DPLL name; used for logging
         */
        const char *name;

        /**
         * @funcs: platform specific hooks
         */
        const struct intel_dpll_funcs *funcs;

        /**
         * @id: unique identifier for this DPLL
         */
        enum intel_dpll_id id;

        /**
         * @power_domain: extra power domain required by the DPLL
         */
        enum intel_display_power_domain power_domain;

        /**
         * @always_on:
         *
         * Inform the state checker that the DPLL is kept enabled even if
         * not in use by any CRTC.
         */
        bool always_on;

        /**
         * @is_alt_port_dpll:
         *
         * Inform the state checker that the DPLL can be used as a fallback
         * (for TC->TBT fallback).
         */
        bool is_alt_port_dpll;
};

/**
 * struct intel_dpll - display PLL with tracked state and users
 */
struct intel_dpll {
        /**
         * @state:
         *
         * Store the state for the pll, including its hw state
         * and CRTCs using it.
         */
        struct intel_dpll_state state;

        /**
         * @index: index for atomic state
         */
        u8 index;

        /**
         * @active_mask: mask of active pipes (i.e. DPMS on) using this DPLL
         */
        u8 active_mask;

        /**
         * @on: is the PLL actually active? Disabled during modeset
         */
        bool on;

        /**
         * @info: platform specific info
         */
        const struct dpll_info *info;

        /**
         * @wakeref: In some platforms a device-level runtime pm reference may
         * need to be grabbed to disable DC states while this DPLL is enabled
         */
        struct ref_tracker *wakeref;
};

#define SKL_DPLL0 0
#define SKL_DPLL1 1
#define SKL_DPLL2 2
#define SKL_DPLL3 3

/* dpll functions */
struct intel_dpll *
intel_get_dpll_by_id(struct intel_display *display,
                     enum intel_dpll_id id);
void assert_dpll(struct intel_display *display,
                 struct intel_dpll *pll,
                 bool state);
#define assert_dpll_enabled(d, p) assert_dpll(d, p, true)
#define assert_dpll_disabled(d, p) assert_dpll(d, p, false)
int intel_dpll_compute(struct intel_atomic_state *state,
                       struct intel_crtc *crtc,
                       struct intel_encoder *encoder);
int intel_dpll_reserve(struct intel_atomic_state *state,
                       struct intel_crtc *crtc,
                       struct intel_encoder *encoder);
void intel_dpll_release(struct intel_atomic_state *state,
                        struct intel_crtc *crtc);
void intel_dpll_crtc_put(const struct intel_crtc *crtc,
                         const struct intel_dpll *pll,
                         struct intel_dpll_state *shared_dpll_state);
void icl_set_active_port_dpll(struct intel_crtc_state *crtc_state,
                              enum icl_port_dpll_id port_dpll_id);
void intel_dpll_update_active(struct intel_atomic_state *state,
                              struct intel_crtc *crtc,
                              struct intel_encoder *encoder);
int intel_dpll_get_freq(struct intel_display *display,
                        const struct intel_dpll *pll,
                        const struct intel_dpll_hw_state *dpll_hw_state);
bool intel_dpll_get_hw_state(struct intel_display *display,
                             struct intel_dpll *pll,
                             struct intel_dpll_hw_state *dpll_hw_state);
void intel_dpll_enable(const struct intel_crtc_state *crtc_state);
void intel_dpll_disable(const struct intel_crtc_state *crtc_state);
void intel_dpll_swap_state(struct intel_atomic_state *state);
void intel_dpll_init(struct intel_display *display);
void intel_dpll_update_ref_clks(struct intel_display *display);
void intel_dpll_readout_hw_state(struct intel_display *display);
void intel_dpll_sanitize_state(struct intel_display *display);

void intel_dpll_dump_hw_state(struct intel_display *display,
                              struct drm_printer *p,
                              const struct intel_dpll_hw_state *dpll_hw_state);
bool intel_dpll_compare_hw_state(struct intel_display *display,
                                 const struct intel_dpll_hw_state *a,
                                 const struct intel_dpll_hw_state *b);
enum intel_dpll_id icl_tc_port_to_pll_id(enum tc_port tc_port);
enum intel_dpll_id mtl_port_to_pll_id(struct intel_display *display, enum port port);
bool intel_dpll_is_combophy(enum intel_dpll_id id);

void intel_dpll_state_verify(struct intel_atomic_state *state,
                             struct intel_crtc *crtc);
void intel_dpll_verify_disabled(struct intel_atomic_state *state);

#endif /* _INTEL_DPLL_MGR_H_ */