/*
 * Copyright 2016 Advanced Micro Devices, Inc.
 *
 * 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 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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: AMD
 *
 */

#include "dce_hwseq.h"
#include "reg_helper.h"
#include "hw_sequencer_private.h"
#include "core_types.h"

#define CTX \
        hws->ctx
#define REG(reg)\
        hws->regs->reg

#undef FN
#define FN(reg_name, field_name) \
        hws->shifts->field_name, hws->masks->field_name

void dce_enable_fe_clock(struct dce_hwseq *hws,
                unsigned int fe_inst, bool enable)
{
        REG_UPDATE(DCFE_CLOCK_CONTROL[fe_inst],
                        DCFE_CLOCK_ENABLE, enable);
}

void dce_pipe_control_lock(struct dc *dc,
                struct pipe_ctx *pipe,
                bool lock)
{
        uint32_t lock_val = lock ? 1 : 0;
        uint32_t dcp_grph, scl, blnd, update_lock_mode, val;
        struct dce_hwseq *hws = dc->hwseq;

        /* Not lock pipe when blank */
        if (lock && pipe->stream_res.tg->funcs->is_blanked &&
            pipe->stream_res.tg->funcs->is_blanked(pipe->stream_res.tg))
                return;

        val = REG_GET_4(BLND_V_UPDATE_LOCK[pipe->stream_res.tg->inst],
                        BLND_DCP_GRPH_V_UPDATE_LOCK, &dcp_grph,
                        BLND_SCL_V_UPDATE_LOCK, &scl,
                        BLND_BLND_V_UPDATE_LOCK, &blnd,
                        BLND_V_UPDATE_LOCK_MODE, &update_lock_mode);

        dcp_grph = lock_val;
        scl = lock_val;
        blnd = lock_val;
        update_lock_mode = lock_val;

        REG_SET_2(BLND_V_UPDATE_LOCK[pipe->stream_res.tg->inst], val,
                        BLND_DCP_GRPH_V_UPDATE_LOCK, dcp_grph,
                        BLND_SCL_V_UPDATE_LOCK, scl);

        if (hws->masks->BLND_BLND_V_UPDATE_LOCK != 0)
                REG_SET_2(BLND_V_UPDATE_LOCK[pipe->stream_res.tg->inst], val,
                                BLND_BLND_V_UPDATE_LOCK, blnd,
                                BLND_V_UPDATE_LOCK_MODE, update_lock_mode);

        if (hws->wa.blnd_crtc_trigger) {
                if (!lock) {
                        uint32_t value = REG_READ(CRTC_H_BLANK_START_END[pipe->stream_res.tg->inst]);
                        REG_WRITE(CRTC_H_BLANK_START_END[pipe->stream_res.tg->inst], value);
                }
        }
}

#if defined(CONFIG_DRM_AMD_DC_SI)
void dce60_pipe_control_lock(struct dc *dc,
                struct pipe_ctx *pipe,
                bool lock)
{
        /* DCE6 has no BLND_V_UPDATE_LOCK register */
}
#endif

void dce_set_blender_mode(struct dce_hwseq *hws,
        unsigned int blnd_inst,
        enum blnd_mode mode)
{
        uint32_t feedthrough = 1;
        uint32_t blnd_mode = 0;
        uint32_t multiplied_mode = 0;
        uint32_t alpha_mode = 2;

        switch (mode) {
        case BLND_MODE_OTHER_PIPE:
                feedthrough = 0;
                blnd_mode = 1;
                alpha_mode = 0;
                break;
        case BLND_MODE_BLENDING:
                feedthrough = 0;
                blnd_mode = 2;
                alpha_mode = 0;
                multiplied_mode = 1;
                break;
        case BLND_MODE_CURRENT_PIPE:
        default:
                if (REG(BLND_CONTROL[blnd_inst]) == REG(BLNDV_CONTROL) ||
                                blnd_inst == 0)
                        feedthrough = 0;
                break;
        }

        REG_UPDATE(BLND_CONTROL[blnd_inst],
                BLND_MODE, blnd_mode);

        if (hws->masks->BLND_ALPHA_MODE != 0) {
                REG_UPDATE_3(BLND_CONTROL[blnd_inst],
                        BLND_FEEDTHROUGH_EN, feedthrough,
                        BLND_ALPHA_MODE, alpha_mode,
                        BLND_MULTIPLIED_MODE, multiplied_mode);
        }
}


static void dce_disable_sram_shut_down(struct dce_hwseq *hws)
{
        if (REG(DC_MEM_GLOBAL_PWR_REQ_CNTL))
                REG_UPDATE(DC_MEM_GLOBAL_PWR_REQ_CNTL,
                                DC_MEM_GLOBAL_PWR_REQ_DIS, 1);
}

static void dce_underlay_clock_enable(struct dce_hwseq *hws)
{
        /* todo: why do we need this at boot? is dce_enable_fe_clock enough? */
        if (REG(DCFEV_CLOCK_CONTROL))
                REG_UPDATE(DCFEV_CLOCK_CONTROL,
                                DCFEV_CLOCK_ENABLE, 1);
}

static void enable_hw_base_light_sleep(void)
{
        /* TODO: implement */
}

static void disable_sw_manual_control_light_sleep(void)
{
        /* TODO: implement */
}

void dce_clock_gating_power_up(struct dce_hwseq *hws,
                bool enable)
{
        if (enable) {
                enable_hw_base_light_sleep();
                disable_sw_manual_control_light_sleep();
        } else {
                dce_disable_sram_shut_down(hws);
                dce_underlay_clock_enable(hws);
        }
}

void dce_crtc_switch_to_clk_src(struct dce_hwseq *hws,
                struct clock_source *clk_src,
                unsigned int tg_inst)
{
        if (clk_src->id == CLOCK_SOURCE_ID_DP_DTO || clk_src->dp_clk_src) {
                REG_UPDATE(PIXEL_RATE_CNTL[tg_inst],
                                DP_DTO0_ENABLE, 1);

        } else if (clk_src->id >= CLOCK_SOURCE_COMBO_PHY_PLL0) {
                uint32_t rate_source = clk_src->id - CLOCK_SOURCE_COMBO_PHY_PLL0;

                REG_UPDATE_2(PHYPLL_PIXEL_RATE_CNTL[tg_inst],
                                PHYPLL_PIXEL_RATE_SOURCE, rate_source,
                                PIXEL_RATE_PLL_SOURCE, 0);

                REG_UPDATE(PIXEL_RATE_CNTL[tg_inst],
                                DP_DTO0_ENABLE, 0);

        } else if (clk_src->id <= CLOCK_SOURCE_ID_PLL2) {
                uint32_t rate_source = clk_src->id - CLOCK_SOURCE_ID_PLL0;

                REG_UPDATE_2(PIXEL_RATE_CNTL[tg_inst],
                                PIXEL_RATE_SOURCE, rate_source,
                                DP_DTO0_ENABLE, 0);

                if (REG(PHYPLL_PIXEL_RATE_CNTL[tg_inst]))
                        REG_UPDATE(PHYPLL_PIXEL_RATE_CNTL[tg_inst],
                                        PIXEL_RATE_PLL_SOURCE, 1);
        } else {
                DC_ERR("Unknown clock source. clk_src id: %d, TG_inst: %d",
                       clk_src->id, tg_inst);
        }
}

/* Only use LUT for 8 bit formats */
bool dce_use_lut(enum surface_pixel_format format)
{
        switch (format) {
        case SURFACE_PIXEL_FORMAT_GRPH_ARGB8888:
        case SURFACE_PIXEL_FORMAT_GRPH_ABGR8888:
                return true;
        default:
                return false;
        }
}