/*
 * Copyright 2019 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.
 *
 * Author: AMD
 */

#include <drm/display/drm_dp_helper.h>
#include <drm/display/drm_dsc_helper.h>
#include "dc_hw_types.h"
#include "dsc.h"
#include "dc.h"
#include "rc_calc.h"
#include "fixed31_32.h"

#include "clk_mgr.h"
#include "resource.h"

#define DC_LOGGER \
        dsc->ctx->logger

/* This module's internal functions */

/* default DSC policy target bitrate limit is 16bpp */
static uint32_t dsc_policy_max_target_bpp_limit = 16;

/* default DSC policy enables DSC only when needed */
static bool dsc_policy_enable_dsc_when_not_needed;

static bool dsc_policy_disable_dsc_stream_overhead;

static bool disable_128b_132b_stream_overhead;

#ifndef MAX
#define MAX(X, Y) ((X) > (Y) ? (X) : (Y))
#endif
#ifndef MIN
#define MIN(X, Y) ((X) < (Y) ? (X) : (Y))
#endif

/* Need to account for padding due to pixel-to-symbol packing
 * for uncompressed 128b/132b streams.
 */
static uint32_t apply_128b_132b_stream_overhead(
        const struct dc_crtc_timing *timing, const uint32_t kbps)
{
        uint32_t total_kbps = kbps;

        if (disable_128b_132b_stream_overhead)
                return kbps;

        if (!timing->flags.DSC) {
                struct fixed31_32 bpp;
                struct fixed31_32 overhead_factor;

                bpp = dc_fixpt_from_int(kbps);
                bpp = dc_fixpt_div_int(bpp, timing->pix_clk_100hz / 10);

                /* Symbols_per_HActive = HActive * bpp / (4 lanes * 32-bit symbol size)
                 * Overhead_factor = ceil(Symbols_per_HActive) / Symbols_per_HActive
                 */
                overhead_factor = dc_fixpt_from_int(timing->h_addressable);
                overhead_factor = dc_fixpt_mul(overhead_factor, bpp);
                overhead_factor = dc_fixpt_div_int(overhead_factor, 128);
                overhead_factor = dc_fixpt_div(
                        dc_fixpt_from_int(dc_fixpt_ceil(overhead_factor)),
                        overhead_factor);

                total_kbps = dc_fixpt_ceil(
                        dc_fixpt_mul_int(overhead_factor, total_kbps));
        }

        return total_kbps;
}

uint32_t dc_bandwidth_in_kbps_from_timing(
        const struct dc_crtc_timing *timing,
        const enum dc_link_encoding_format link_encoding)
{
        uint32_t bits_per_channel = 0;
        uint32_t kbps;

        if (timing->flags.DSC)
                return dc_dsc_stream_bandwidth_in_kbps(timing,
                                timing->dsc_cfg.bits_per_pixel,
                                timing->dsc_cfg.num_slices_h,
                                timing->dsc_cfg.is_dp);

        switch (timing->display_color_depth) {
        case COLOR_DEPTH_666:
                bits_per_channel = 6;
                break;
        case COLOR_DEPTH_888:
                bits_per_channel = 8;
                break;
        case COLOR_DEPTH_101010:
                bits_per_channel = 10;
                break;
        case COLOR_DEPTH_121212:
                bits_per_channel = 12;
                break;
        case COLOR_DEPTH_141414:
                bits_per_channel = 14;
                break;
        case COLOR_DEPTH_161616:
                bits_per_channel = 16;
                break;
        default:
                ASSERT(bits_per_channel != 0);
                bits_per_channel = 8;
                break;
        }

        kbps = timing->pix_clk_100hz / 10;
        kbps *= bits_per_channel;

        if (timing->flags.Y_ONLY != 1) {
                /*Only YOnly make reduce bandwidth by 1/3 compares to RGB*/
                kbps *= 3;
                if (timing->pixel_encoding == PIXEL_ENCODING_YCBCR420)
                        kbps /= 2;
                else if (timing->pixel_encoding == PIXEL_ENCODING_YCBCR422)
                        kbps = kbps * 2 / 3;
        }

        if (link_encoding == DC_LINK_ENCODING_DP_128b_132b)
                kbps = apply_128b_132b_stream_overhead(timing, kbps);

        if (link_encoding == DC_LINK_ENCODING_HDMI_FRL &&
                        timing->vic == 0 && timing->hdmi_vic == 0 &&
                        timing->frl_uncompressed_video_bandwidth_in_kbps != 0)
                kbps = timing->frl_uncompressed_video_bandwidth_in_kbps;

        return kbps;
}

const struct dc_dsc_primary_bpp prim_bpp_444[] = {
        /* VIC/BPP */
        {64,  192}, /* 1920x1080 @ 100 */
        {77,  192}, /* 1920x1080 @ 100 */
        {63,  192}, /* 1920x1080 @ 120 */
        {78,  192}, /* 1920x1080 @ 120 */
        {93,  192}, /* 3840x2160 @ 24 */
        {103, 192}, /* 3840x2160 @ 24 */
        {94,  192}, /* 3840x2160 @ 25 */
        {104, 192}, /* 3840x2160 @ 25 */
        {95,  192}, /* 3840x2160 @ 30 */
        {105, 192}, /* 3840x2160 @ 30 */
        {114, 192}, /* 3840x2160 @ 48 */
        {116, 192}, /* 3840x2160 @ 48 */
        {96,  192}, /* 3840x2160 @ 50 */
        {106, 192}, /* 3840x2160 @ 50 */
        {97,  192}, /* 3840x2160 @ 60 */
        {107, 192}, /* 3840x2160 @ 60 */
        {117, 192}, /* 3840x2160 @ 100 */
        {119, 192}, /* 3840x2160 @ 100 */
        {118, 192}, /* 3840x2160 @ 120 */
        {120, 192}, /* 3840x2160 @ 120 */
        {98,  192}, /* 4096x2160 @ 24 */
        {99,  192}, /* 4096x2160 @ 25 */
        {100, 192}, /* 4096x2160 @ 30 */
        {115, 192}, /* 4096x2160 @ 48 */
        {101, 192}, /* 4096x2160 @ 50 */
        {102, 192}, /* 4096x2160 @ 60 */
        {218, 192}, /* 4096x2160 @ 100 */
        {219, 192}, /* 4096x2160 @ 120 */
        {121, 192}, /* 5120x2160 @ 24 */
        {122, 192}, /* 5120x2160 @ 25 */
        {123, 192}, /* 5120x2160 @ 30 */
        {124, 192}, /* 5120x2160 @ 48 */
        {125, 192}, /* 5120x2160 @ 50 */
        {126, 173}, /* 5120x2160 @ 60 */
        {127, 192}, /* 5120x2160 @ 100 */
        {193, 175}, /* 5120x2160 @ 120 */
        {194, 192}, /* 7680x2160 @ 24 */
        {202, 192}, /* 7680x2160 @ 24 */
        {195, 192}, /* 7680x2160 @ 25 */
        {203, 192}, /* 7680x2160 @ 25 */
        {196, 192}, /* 7680x2160 @ 30 */
        {204, 192}, /* 7680x2160 @ 30 */
        {197, 157}, /* 7680x2160 @ 48 */
        {205, 157}, /* 7680x2160 @ 48 */
        {198, 157}, /* 7680x2160 @ 50 */
        {206, 157}, /* 7680x2160 @ 50 */
        {199, 159}, /* 7680x2160 @ 60 */
        {207, 159}, /* 7680x2160 @ 60 */
        {200, 134}, /* 7680x2160 @ 100 */
        {208, 134}, /* 7680x2160 @ 100 */
        {201, 130}, /* 7680x2160 @ 120 */
        {209, 130}, /* 7680x2160 @ 120 */
        {210, 182}, /* 10240x4320 @ 24 */
        {211, 181}, /* 10240x4320 @ 25 */
        {212, 177}, /* 10240x4320 @ 30 */
        {213, 163}, /* 10240x4320 @ 48 */
        {214, 162}, /* 10240x4320 @ 50 */
        {215, 157}, /* 10240x4320 @ 60 */
};
const struct dc_dsc_primary_bpp prim_bpp_422[] = {
        /* VIC/BPP */
        {114, 192}, /* 3840x2160 @ 48 */
        {116, 192}, /* 3840x2160 @ 48 */
        {96,  192}, /* 3840x2160 @ 50 */
        {106, 192}, /* 3840x2160 @ 50 */
        {97,  192}, /* 3840x2160 @ 60 */
        {107, 192}, /* 3840x2160 @ 60 */
        {117, 137}, /* 3840x2160 @ 100 */
        {119, 137}, /* 3840x2160 @ 100 */
        {118, 113}, /* 3840x2160 @ 120 */
        {120, 113}, /* 3840x2160 @ 120 */
        {115, 192}, /* 4096x2160 @ 48 */
        {101, 192}, /* 4096x2160 @ 50 */
        {102, 192}, /* 4096x2160 @ 60 */
        {218, 192}, /* 4096x2160 @ 100 */
        {219, 192}, /* 4096x2160 @ 120 */
        {121, 192}, /* 5120x2160 @ 24 */
        {122, 192}, /* 5120x2160 @ 25 */
        {123, 192}, /* 5120x2160 @ 30 */
        {124, 192}, /* 5120x2160 @ 48 */
        {125, 192}, /* 5120x2160 @ 50 */
        {126, 173}, /* 5120x2160 @ 60 */
        {127, 192}, /* 5120x2160 @ 100 */
        {193, 175}, /* 5120x2160 @ 120 */
        {194, 123}, /* 7680x2160 @ 24 */
        {202, 123}, /* 7680x2160 @ 24 */
        {195, 123}, /* 7680x2160 @ 25 */
        {203, 123}, /* 7680x2160 @ 25 */
        {196, 118}, /* 7680x2160 @ 30 */
        {204, 118}, /* 7680x2160 @ 30 */
        {197, 123}, /* 7680x2160 @ 48 */
        {205, 123}, /* 7680x2160 @ 48 */
        {198, 123}, /* 7680x2160 @ 50 */
        {206, 123}, /* 7680x2160 @ 50 */
        {199, 119}, /* 7680x2160 @ 60 */
        {207, 119}, /* 7680x2160 @ 60 */
        {200, 134}, /* 7680x2160 @ 100 */
        {208, 134}, /* 7680x2160 @ 100 */
        {201, 130}, /* 7680x2160 @ 120 */
        {209, 130}, /* 7680x2160 @ 120 */
        {210, 182}, /* 10240x4320 @ 24 */
        {211, 181}, /* 10240x4320 @ 25 */
        {212, 177}, /* 10240x4320 @ 30 */
        {213, 126}, /* 10240x4320 @ 48 */
        {214, 125}, /* 10240x4320 @ 50 */
        {215, 117}, /* 10240x4320 @ 60 */
        {216, 125}, /* 10240x4320 @ 100 */
        {217, 117}, /* 10240x4320 @ 120 */
};

const struct dc_dsc_primary_bpp prim_bpp_420[] = {
        /* VIC/BPP */
        {114, 192}, /* 3840x2160 @ 48 */
        {116, 192}, /* 3840x2160 @ 48 */
        {96,  192}, /* 3840x2160 @ 50 */
        {106, 192}, /* 3840x2160 @ 50 */
        {97,  192}, /* 3840x2160 @ 60 */
        {107, 192}, /* 3840x2160 @ 60 */
        {117, 137}, /* 3840x2160 @ 100 */
        {119, 137}, /* 3840x2160 @ 100 */
        {118, 113}, /* 3840x2160 @ 120 */
        {120, 113}, /* 3840x2160 @ 120 */
        {115, 192}, /* 4096x2160 @ 48 */
        {101, 192}, /* 4096x2160 @ 50 */
        {102, 192}, /* 4096x2160 @ 60 */
        {218, 129}, /* 4096x2160 @ 100 */
        {219, 106}, /* 4096x2160 @ 120 */
        {124, 192}, /* 5120x2160 @ 48 */
        {125, 192}, /* 5120x2160 @ 50 */
        {126, 173}, /* 5120x2160 @ 60 */
        {127, 192}, /* 5120x2160 @ 100 */
        {193, 175}, /* 5120x2160 @ 120 */
        {194, 123}, /* 7680x4320 @ 24 */
        {202, 123}, /* 7680x4320 @ 24 */
        {195, 123}, /* 7680x4320 @ 25 */
        {203, 123}, /* 7680x4320 @ 25 */
        {196, 118}, /* 7680x4320 @ 30 */
        {204, 118}, /* 7680x4320 @ 30 */
        {197, 123}, /* 7680x4320 @ 48 */
        {205, 123}, /* 7680x4320 @ 48 */
        {198, 123}, /* 7680x4320 @ 50 */
        {206, 123}, /* 7680x4320 @ 50 */
        {199, 119}, /* 7680x4320 @ 60 */
        {207, 119}, /* 7680x4320 @ 60 */
        {200, 112}, /* 7680x4320 @ 100 */
        {208, 112}, /* 7680x4320 @ 100 */
        {201, 103}, /* 7680x4320 @ 120 */
        {209, 103}, /* 7680x4320 @ 120 */
        {210,  98}, /* 10240x4320 @ 24 */
        {211,  98}, /* 10240x4320 @ 25 */
        {212, 177}, /* 10240x4320 @ 30 */
        {213,  98}, /* 10240x4320 @ 48 */
        {214, 125}, /* 10240x4320 @ 50 */
        {215, 117}, /* 10240x4320 @ 60 */
        {216, 107}, /* 10240x4320 @ 100 */
        {217,  97}, /* 10240x4320 @ 120 */
};

/* Forward Declerations */
static unsigned int get_min_dsc_slice_count_for_odm(
                const struct display_stream_compressor *dsc,
                const struct dsc_enc_caps *dsc_enc_caps,
                const struct dc_crtc_timing *timing);

static bool decide_dsc_bandwidth_range(
                const uint32_t min_bpp_x16,
                const uint32_t max_bpp_x16,
                const uint32_t num_slices_h,
                const struct dsc_enc_caps *dsc_caps,
                const struct dc_crtc_timing *timing,
                const enum dc_link_encoding_format link_encoding,
                struct dc_dsc_bw_range *range);

static uint32_t compute_bpp_x16_from_target_bandwidth(
                const uint32_t bandwidth_in_kbps,
                const struct dc_crtc_timing *timing,
                const uint32_t num_slices_h,
                const uint32_t bpp_increment_div,
                const bool is_dp);

static void get_dsc_enc_caps(
                const struct display_stream_compressor *dsc,
                struct dsc_enc_caps *dsc_enc_caps,
                int pixel_clock_100Hz);

static bool intersect_dsc_caps(
                const struct dsc_dec_dpcd_caps *dsc_sink_caps,
                const struct dsc_enc_caps *dsc_enc_caps,
                enum dc_pixel_encoding pixel_encoding,
                struct dsc_enc_caps *dsc_common_caps);

static bool setup_dsc_config(
                const struct dsc_dec_dpcd_caps *dsc_sink_caps,
                const struct dsc_enc_caps *dsc_enc_caps,
                int target_bandwidth_kbps,
                const struct dc_crtc_timing *timing,
                const struct dc_dsc_config_options *options,
                const enum dc_link_encoding_format link_encoding,
                int min_slice_count,
                struct dc_dsc_config *dsc_cfg);

static bool convert_bandwidth_to_frl_params(
        int bandwidth_kbps,
        int *num_lanes,
        int *frl_rate);

static uint32_t compute_bpp_x16_from_frl_params(
                const struct dc_crtc_timing *timing,
                const uint32_t num_slices_h,
                const struct dsc_enc_caps *dsc_caps);
static bool dsc_buff_block_size_from_dpcd(int dpcd_buff_block_size, int *buff_block_size)
{

        switch (dpcd_buff_block_size) {
        case DP_DSC_RC_BUF_BLK_SIZE_1:
                *buff_block_size = 1024;
                break;
        case DP_DSC_RC_BUF_BLK_SIZE_4:
                *buff_block_size = 4 * 1024;
                break;
        case DP_DSC_RC_BUF_BLK_SIZE_16:
                *buff_block_size = 16 * 1024;
                break;
        case DP_DSC_RC_BUF_BLK_SIZE_64:
                *buff_block_size = 64 * 1024;
                break;
        default: {
                        dm_error("%s: DPCD DSC buffer size not recognized.\n", __func__);
                        return false;
                }
        }

        return true;
}


static bool dsc_line_buff_depth_from_dpcd(int dpcd_line_buff_bit_depth, int *line_buff_bit_depth)
{
        if (0 <= dpcd_line_buff_bit_depth && dpcd_line_buff_bit_depth <= 7)
                *line_buff_bit_depth = dpcd_line_buff_bit_depth + 9;
        else if (dpcd_line_buff_bit_depth == 8)
                *line_buff_bit_depth = 8;
        else {
                dm_error("%s: DPCD DSC buffer depth not recognized.\n", __func__);
                return false;
        }

        return true;
}


static bool dsc_throughput_from_dpcd(int dpcd_throughput, int *throughput)
{
        switch (dpcd_throughput) {
        case DP_DSC_THROUGHPUT_MODE_0_UNSUPPORTED:
                *throughput = 0;
                break;
        case DP_DSC_THROUGHPUT_MODE_0_170:
                *throughput = 170;
                break;
        case DP_DSC_THROUGHPUT_MODE_0_340:
                *throughput = 340;
                break;
        case DP_DSC_THROUGHPUT_MODE_0_400:
                *throughput = 400;
                break;
        case DP_DSC_THROUGHPUT_MODE_0_450:
                *throughput = 450;
                break;
        case DP_DSC_THROUGHPUT_MODE_0_500:
                *throughput = 500;
                break;
        case DP_DSC_THROUGHPUT_MODE_0_550:
                *throughput = 550;
                break;
        case DP_DSC_THROUGHPUT_MODE_0_600:
                *throughput = 600;
                break;
        case DP_DSC_THROUGHPUT_MODE_0_650:
                *throughput = 650;
                break;
        case DP_DSC_THROUGHPUT_MODE_0_700:
                *throughput = 700;
                break;
        case DP_DSC_THROUGHPUT_MODE_0_750:
                *throughput = 750;
                break;
        case DP_DSC_THROUGHPUT_MODE_0_800:
                *throughput = 800;
                break;
        case DP_DSC_THROUGHPUT_MODE_0_850:
                *throughput = 850;
                break;
        case DP_DSC_THROUGHPUT_MODE_0_900:
                *throughput = 900;
                break;
        case DP_DSC_THROUGHPUT_MODE_0_950:
                *throughput = 950;
                break;
        case DP_DSC_THROUGHPUT_MODE_0_1000:
                *throughput = 1000;
                break;
        default: {
                        dm_error("%s: DPCD DSC throughput mode not recognized.\n", __func__);
                        return false;
                }
        }

        return true;
}


static bool dsc_bpp_increment_div_from_dpcd(uint8_t bpp_increment_dpcd, uint32_t *bpp_increment_div)
{
        // Mask bpp increment dpcd field to avoid reading other fields
        bpp_increment_dpcd &= 0x7;

        switch (bpp_increment_dpcd) {
        case 0:
                *bpp_increment_div = 16;
                break;
        case 1:
                *bpp_increment_div = 8;
                break;
        case 2:
                *bpp_increment_div = 4;
                break;
        case 3:
                *bpp_increment_div = 2;
                break;
        case 4:
                *bpp_increment_div = 1;
                break;
        default: {
                dm_error("%s: DPCD DSC bits-per-pixel increment not recognized.\n", __func__);
                return false;
        }
        }

        return true;
}



static bool get_vic_preset_bpp(
                const struct dc_crtc_timing *timing,
                int *preset_bpp)
{
        bool preset_found = false;
        uint32_t table_size_444 = ARRAY_SIZE(prim_bpp_444);
        uint32_t table_size_422 = ARRAY_SIZE(prim_bpp_422);
        uint32_t table_size_420 = ARRAY_SIZE(prim_bpp_420);
        uint32_t i;
        uint32_t vid_id;

        if (timing->vic == 0 && timing->hdmi_vic == 0)
                return false;

        vid_id = timing->vic;
        switch (timing->hdmi_vic) {
        case 1:
                vid_id = 95;
                break;
        case 2:
                vid_id = 94;
                break;
        case 3:
                vid_id = 93;
                break;
        case 4:
                vid_id = 98;
                break;
        default:
                break;
        }

        if (timing->pixel_encoding == PIXEL_ENCODING_RGB ||
                        timing->pixel_encoding == PIXEL_ENCODING_YCBCR444) {
                for (i = 0; i < table_size_444 ; i++) {
                        if (prim_bpp_444[i].vic == vid_id) {
                                preset_found = true;
                                *preset_bpp = prim_bpp_444[i].target_bpp;
                                break;
                        }
                }
        } else if (timing->pixel_encoding == PIXEL_ENCODING_YCBCR422) {
                for (i = 0; i < table_size_422 ; i++) {
                        if (prim_bpp_422[i].vic == vid_id) {
                                preset_found = true;
                                *preset_bpp = prim_bpp_422[i].target_bpp;
                                break;
                        }
                }
        } else if (timing->pixel_encoding == PIXEL_ENCODING_YCBCR420) {
                for (i = 0; i < table_size_420 ; i++) {
                        if (prim_bpp_420[i].vic == vid_id) {
                                preset_found = true;
                                *preset_bpp = prim_bpp_420[i].target_bpp;
                                break;
                        }
                }
        } else {
                return false;
        }

        return preset_found;
}

static int hdmi_dsc_get_num_slices(const struct dc_crtc_timing *timing)
{
        int k_slice_adjust = 1;
        int adj_pix_clk_mhz;
        int min_slices;
        int slice_target;
        int slice_width = timing->h_addressable;
        int h_ratio_adj_pix_clk_mhz;

        if (timing->pixel_encoding == PIXEL_ENCODING_RGB ||
                        timing->pixel_encoding == PIXEL_ENCODING_YCBCR444)
                k_slice_adjust = 2;

        adj_pix_clk_mhz = k_slice_adjust * timing->pix_clk_100hz / 10000 / 2;
        h_ratio_adj_pix_clk_mhz = adj_pix_clk_mhz * timing->h_addressable / timing->h_total;
        if (adj_pix_clk_mhz <= 2720) {
                min_slices = adj_pix_clk_mhz / 340;
                if (adj_pix_clk_mhz % 340 != 0)
                        min_slices++;
        } else if (adj_pix_clk_mhz <= 4800) {
                min_slices = adj_pix_clk_mhz / 400;
                if (adj_pix_clk_mhz % 400 != 0)
                        min_slices++;
        } else if (h_ratio_adj_pix_clk_mhz <= 4800) {
                min_slices = h_ratio_adj_pix_clk_mhz / 600;
                if (h_ratio_adj_pix_clk_mhz % 600 != 0)
                        min_slices++;
        } else {
                min_slices = h_ratio_adj_pix_clk_mhz / 900;
                if (h_ratio_adj_pix_clk_mhz % 900 != 0)
                        min_slices++;
        }

        do {
                if (min_slices <= 1)
                        slice_target = 1;
                else if (min_slices <= 2)
                        slice_target = 2;
                else if (min_slices <= 4)
                        slice_target = 4;
                else if (min_slices <= 8)
                        slice_target = 8;
                else if (min_slices <= 12)
                        slice_target = 12;
                else if (min_slices <= 16)
                        slice_target = 16;
                else
                        return 0;

                slice_width = timing->h_addressable / slice_target;
                min_slices++;
        } while (slice_width > 2720);

        return slice_target;
}

static int hdmi_dsc_get_bpp(const struct dc_crtc_timing *timing,
                const struct dsc_enc_caps *dsc_common_caps)
{
        int max_dsc_bpp, min_dsc_bpp;
        int target_bytes;
        bool bpp_found = false;
        int bpp_decrement_x16;
        int src_fractional_bpp = dsc_common_caps->bpp_increment_div;
        int bpp_target;
        int bpp_target_x16;
        int bpc_factor = 8;
        int slice_width;
        int num_slices;
        bool hdmi_all_bpp = dsc_common_caps->is_vic_all_bpp;
        int hdmi_max_chunk_bytes = dsc_common_caps->total_chunk_kbytes;

        int preset_bpp;
        bool preset_found = false;

        if (timing->display_color_depth == COLOR_DEPTH_101010)
                bpc_factor = 10;
        if (timing->display_color_depth == COLOR_DEPTH_121212)
                bpc_factor = 12;

        /* Assuming: bpc as 8*/
        if (timing->pixel_encoding == PIXEL_ENCODING_RGB ||
                        timing->pixel_encoding == PIXEL_ENCODING_YCBCR444) {
                min_dsc_bpp = 8;
                max_dsc_bpp = 3 * bpc_factor;
        } else if (timing->pixel_encoding == PIXEL_ENCODING_YCBCR422) {
                min_dsc_bpp = 7;
                max_dsc_bpp = 2 * bpc_factor;
        } else {
                min_dsc_bpp = 6;
                max_dsc_bpp = 3 * bpc_factor / 2;
        }

        if (!hdmi_all_bpp)
                max_dsc_bpp = min(max_dsc_bpp, 12);


        num_slices = hdmi_dsc_get_num_slices(timing);
        if (num_slices == 0)
                return 0;

        slice_width = timing->h_addressable / num_slices;

        bpp_target = max_dsc_bpp;
        bpp_decrement_x16 = 16 / src_fractional_bpp;
        bpp_target_x16 = (bpp_target * 16) - bpp_decrement_x16;
        if (!hdmi_all_bpp)
                        bpp_target_x16 = (bpp_target * 16);

        /* check if byte target is below allowed Kbytes */
        while (bpp_target_x16 > (min_dsc_bpp * 16)) {
                target_bytes = num_slices * slice_width * bpp_target_x16 / 16 / 8;
                if (target_bytes <= hdmi_max_chunk_bytes) {
                        bpp_found = true;
                        break;
                }
                bpp_target_x16 -= bpp_decrement_x16;
        }

        if (bpp_found) {
                if (!hdmi_all_bpp) {
                        /* Get preset bpp for CTA modes */
                        preset_found = get_vic_preset_bpp(timing, &preset_bpp);
                        if (preset_found) {
                                bpp_target_x16 = preset_bpp;
                                target_bytes =
                                                num_slices * slice_width * bpp_target_x16 / 16 / 8;
                                if (target_bytes > hdmi_max_chunk_bytes)
                                        return 0;
                        }
                }
                return bpp_target_x16;
        }

        return 0;
}

bool dc_dsc_parse_dsc_dpcd(const struct dc *dc,
                const uint8_t *dpcd_dsc_basic_data,
                const uint8_t *dpcd_dsc_branch_decoder_caps,
                struct dsc_dec_dpcd_caps *dsc_sink_caps)
{
        if (!dpcd_dsc_basic_data)
                return false;

        dsc_sink_caps->is_dsc_supported =
                (dpcd_dsc_basic_data[DP_DSC_SUPPORT - DP_DSC_SUPPORT] & DP_DSC_DECOMPRESSION_IS_SUPPORTED) != 0;
        if (!dsc_sink_caps->is_dsc_supported)
                return false;

        dsc_sink_caps->dsc_version = dpcd_dsc_basic_data[DP_DSC_REV - DP_DSC_SUPPORT];

        {
                int buff_block_size;
                int buff_size;

                if (!dsc_buff_block_size_from_dpcd(
                                dpcd_dsc_basic_data[DP_DSC_RC_BUF_BLK_SIZE - DP_DSC_SUPPORT] & 0x03,
                                &buff_block_size))
                        return false;

                buff_size = dpcd_dsc_basic_data[DP_DSC_RC_BUF_SIZE - DP_DSC_SUPPORT] + 1;
                dsc_sink_caps->rc_buffer_size = buff_size * buff_block_size;
        }

        dsc_sink_caps->slice_caps1.raw = dpcd_dsc_basic_data[DP_DSC_SLICE_CAP_1 - DP_DSC_SUPPORT];
        if (!dsc_line_buff_depth_from_dpcd(dpcd_dsc_basic_data[DP_DSC_LINE_BUF_BIT_DEPTH - DP_DSC_SUPPORT],
                                                                           &dsc_sink_caps->lb_bit_depth))
                return false;

        dsc_sink_caps->is_block_pred_supported =
                (dpcd_dsc_basic_data[DP_DSC_BLK_PREDICTION_SUPPORT - DP_DSC_SUPPORT] &
                 DP_DSC_BLK_PREDICTION_IS_SUPPORTED) != 0;

        dsc_sink_caps->edp_max_bits_per_pixel =
                dpcd_dsc_basic_data[DP_DSC_MAX_BITS_PER_PIXEL_LOW - DP_DSC_SUPPORT] |
                dpcd_dsc_basic_data[DP_DSC_MAX_BITS_PER_PIXEL_HI - DP_DSC_SUPPORT] << 8;

        dsc_sink_caps->color_formats.raw = dpcd_dsc_basic_data[DP_DSC_DEC_COLOR_FORMAT_CAP - DP_DSC_SUPPORT];
        dsc_sink_caps->color_depth.raw = dpcd_dsc_basic_data[DP_DSC_DEC_COLOR_DEPTH_CAP - DP_DSC_SUPPORT];

        {
                int dpcd_throughput = dpcd_dsc_basic_data[DP_DSC_PEAK_THROUGHPUT - DP_DSC_SUPPORT];
                int dsc_throughput_granular_delta;

                dsc_throughput_granular_delta = dpcd_dsc_basic_data[DP_DSC_RC_BUF_BLK_SIZE - DP_DSC_SUPPORT] >> 3;
                dsc_throughput_granular_delta *= 2;

                if (!dsc_throughput_from_dpcd(dpcd_throughput & DP_DSC_THROUGHPUT_MODE_0_MASK,
                                                                          &dsc_sink_caps->throughput_mode_0_mps))
                        return false;
                dsc_sink_caps->throughput_mode_0_mps += dsc_throughput_granular_delta;

                dpcd_throughput = (dpcd_throughput & DP_DSC_THROUGHPUT_MODE_1_MASK) >> DP_DSC_THROUGHPUT_MODE_1_SHIFT;
                if (!dsc_throughput_from_dpcd(dpcd_throughput, &dsc_sink_caps->throughput_mode_1_mps))
                        return false;
        }

        dsc_sink_caps->max_slice_width = dpcd_dsc_basic_data[DP_DSC_MAX_SLICE_WIDTH - DP_DSC_SUPPORT] * 320;
        dsc_sink_caps->slice_caps2.raw = dpcd_dsc_basic_data[DP_DSC_SLICE_CAP_2 - DP_DSC_SUPPORT];

        if (!dsc_bpp_increment_div_from_dpcd(dpcd_dsc_basic_data[DP_DSC_BITS_PER_PIXEL_INC - DP_DSC_SUPPORT],
                                                                                 &dsc_sink_caps->bpp_increment_div))
                return false;

        if (dc->debug.dsc_bpp_increment_div) {
                /* dsc_bpp_increment_div should onl be 1, 2, 4, 8 or 16, but rather than rejecting invalid values,
                 * we'll accept all and get it into range. This also makes the above check against 0 redundant,
                 * but that one stresses out the override will be only used if it's not 0.
                 */
                if (dc->debug.dsc_bpp_increment_div >= 1)
                        dsc_sink_caps->bpp_increment_div = 1;
                if (dc->debug.dsc_bpp_increment_div >= 2)
                        dsc_sink_caps->bpp_increment_div = 2;
                if (dc->debug.dsc_bpp_increment_div >= 4)
                        dsc_sink_caps->bpp_increment_div = 4;
                if (dc->debug.dsc_bpp_increment_div >= 8)
                        dsc_sink_caps->bpp_increment_div = 8;
                if (dc->debug.dsc_bpp_increment_div >= 16)
                        dsc_sink_caps->bpp_increment_div = 16;
        }

        /* Extended caps */
        if (dpcd_dsc_branch_decoder_caps == NULL) { // branch decoder DPCD DSC data can be null for non branch device
                dsc_sink_caps->branch_overall_throughput_0_mps = 0;
                dsc_sink_caps->branch_overall_throughput_1_mps = 0;
                dsc_sink_caps->branch_max_line_width = 0;
                return true;
        }

        dsc_sink_caps->branch_overall_throughput_0_mps =
                dpcd_dsc_branch_decoder_caps[DP_DSC_BRANCH_OVERALL_THROUGHPUT_0 - DP_DSC_BRANCH_OVERALL_THROUGHPUT_0];
        if (dsc_sink_caps->branch_overall_throughput_0_mps == 0)
                dsc_sink_caps->branch_overall_throughput_0_mps = 0;
        else if (dsc_sink_caps->branch_overall_throughput_0_mps == 1)
                dsc_sink_caps->branch_overall_throughput_0_mps = 680;
        else {
                dsc_sink_caps->branch_overall_throughput_0_mps *= 50;
                dsc_sink_caps->branch_overall_throughput_0_mps += 600;
        }

        dsc_sink_caps->branch_overall_throughput_1_mps =
                dpcd_dsc_branch_decoder_caps[DP_DSC_BRANCH_OVERALL_THROUGHPUT_1 - DP_DSC_BRANCH_OVERALL_THROUGHPUT_0];
        if (dsc_sink_caps->branch_overall_throughput_1_mps == 0)
                dsc_sink_caps->branch_overall_throughput_1_mps = 0;
        else if (dsc_sink_caps->branch_overall_throughput_1_mps == 1)
                dsc_sink_caps->branch_overall_throughput_1_mps = 680;
        else {
                dsc_sink_caps->branch_overall_throughput_1_mps *= 50;
                dsc_sink_caps->branch_overall_throughput_1_mps += 600;
        }

        dsc_sink_caps->branch_max_line_width =
                dpcd_dsc_branch_decoder_caps[DP_DSC_BRANCH_MAX_LINE_WIDTH - DP_DSC_BRANCH_OVERALL_THROUGHPUT_0] * 320;
        ASSERT(dsc_sink_caps->branch_max_line_width == 0 || dsc_sink_caps->branch_max_line_width >= 5120);

        dsc_sink_caps->is_dp = true;
        return true;
}
bool dc_dsc_parse_dsc_edid(const struct dc *dc, const struct dc_edid_caps *edid_caps,
                struct dsc_dec_dpcd_caps *dsc_sink_caps)
{
        (void)dc;
        dsc_sink_caps->is_dsc_supported = edid_caps->frl_dsc_support;
        if (!edid_caps->frl_dsc_support)
                return false;

        dsc_sink_caps->dsc_version = 0x21;
        dsc_sink_caps->is_frl = true;
        dsc_sink_caps->is_dp = false;

        switch (edid_caps->frl_dsc_max_slices) {
        case 0:
                break;
        case 1:
                dsc_sink_caps->slice_caps1.bits.NUM_SLICES_1 = 1;
                dsc_sink_caps->throughput_mode_0_mps = 340;
                dsc_sink_caps->throughput_mode_1_mps = 680;
                break;
        case 2:
                dsc_sink_caps->slice_caps1.bits.NUM_SLICES_1 = 1;
                dsc_sink_caps->slice_caps1.bits.NUM_SLICES_2 = 1;
                dsc_sink_caps->throughput_mode_0_mps = 340;
                dsc_sink_caps->throughput_mode_1_mps = 680;
                break;
        case 3:
                dsc_sink_caps->slice_caps1.bits.NUM_SLICES_1 = 1;
                dsc_sink_caps->slice_caps1.bits.NUM_SLICES_2 = 1;
                dsc_sink_caps->slice_caps1.bits.NUM_SLICES_4 = 1;
                dsc_sink_caps->throughput_mode_0_mps = 340;
                dsc_sink_caps->throughput_mode_1_mps = 680;
                break;
        case 4:
                dsc_sink_caps->slice_caps1.bits.NUM_SLICES_1 = 1;
                dsc_sink_caps->slice_caps1.bits.NUM_SLICES_2 = 1;
                dsc_sink_caps->slice_caps1.bits.NUM_SLICES_4 = 1;
                dsc_sink_caps->slice_caps1.bits.NUM_SLICES_8 = 1;
                dsc_sink_caps->throughput_mode_0_mps = 340;
                dsc_sink_caps->throughput_mode_1_mps = 680;
                break;
        case 5:
                dsc_sink_caps->slice_caps1.bits.NUM_SLICES_1 = 1;
                dsc_sink_caps->slice_caps1.bits.NUM_SLICES_2 = 1;
                dsc_sink_caps->slice_caps1.bits.NUM_SLICES_4 = 1;
                dsc_sink_caps->slice_caps1.bits.NUM_SLICES_8 = 1;
                dsc_sink_caps->throughput_mode_0_mps = 400;
                dsc_sink_caps->throughput_mode_1_mps = 800;
                break;
        case 6:
                dsc_sink_caps->slice_caps1.bits.NUM_SLICES_1 = 1;
                dsc_sink_caps->slice_caps1.bits.NUM_SLICES_2 = 1;
                dsc_sink_caps->slice_caps1.bits.NUM_SLICES_4 = 1;
                dsc_sink_caps->slice_caps1.bits.NUM_SLICES_8 = 1;
                dsc_sink_caps->slice_caps1.bits.NUM_SLICES_12 = 1;
                dsc_sink_caps->throughput_mode_0_mps = 400;
                dsc_sink_caps->throughput_mode_1_mps = 800;
                break;
        case 7:
                dsc_sink_caps->slice_caps1.bits.NUM_SLICES_1 = 1;
                dsc_sink_caps->slice_caps1.bits.NUM_SLICES_2 = 1;
                dsc_sink_caps->slice_caps1.bits.NUM_SLICES_4 = 1;
                dsc_sink_caps->slice_caps1.bits.NUM_SLICES_8 = 1;
                dsc_sink_caps->slice_caps1.bits.NUM_SLICES_12 = 1;
                dsc_sink_caps->throughput_mode_0_mps = 600;
                dsc_sink_caps->throughput_mode_1_mps = 1200;
                break;
        case 8:
        default:
                dsc_sink_caps->slice_caps1.bits.NUM_SLICES_1 = 1;
                dsc_sink_caps->slice_caps1.bits.NUM_SLICES_2 = 1;
                dsc_sink_caps->slice_caps1.bits.NUM_SLICES_4 = 1;
                dsc_sink_caps->slice_caps1.bits.NUM_SLICES_8 = 1;
                dsc_sink_caps->slice_caps1.bits.NUM_SLICES_12 = 1;
                dsc_sink_caps->throughput_mode_0_mps = 900;
                dsc_sink_caps->throughput_mode_1_mps = 1800;
                break;
        }
        dsc_sink_caps->lb_bit_depth = 13; //Table 7-25
        dsc_sink_caps->is_block_pred_supported = true; //Table 7-25
        dsc_sink_caps->color_formats.bits.RGB = 1;
        dsc_sink_caps->color_formats.bits.YCBCR_444 = 1;
        dsc_sink_caps->color_formats.bits.YCBCR_NATIVE_422 = 1;
        dsc_sink_caps->color_formats.bits.YCBCR_NATIVE_420 =
                        (edid_caps->frl_dsc_native_420 == true) ? 1 : 0;
        dsc_sink_caps->color_depth.bits.COLOR_DEPTH_8_BPC = 1;
        dsc_sink_caps->color_depth.bits.COLOR_DEPTH_10_BPC =
                        (edid_caps->frl_dsc_10bpc == true) ? 1 : 0;
        dsc_sink_caps->color_depth.bits.COLOR_DEPTH_12_BPC =
                        (edid_caps->frl_dsc_12bpc == true) ? 1 : 0;
        dsc_sink_caps->max_slice_width = 2560;
        dsc_sink_caps->bpp_increment_div = 16; /* bpp increment divisor, e.g. if 16, it's 1/16th of a bit */
        dsc_sink_caps->is_vic_all_bpp = edid_caps->frl_dsc_all_bpp;
        dsc_sink_caps->total_chunk_kbytes =
                        1024 * (1 + edid_caps->frl_dsc_total_chunk_kbytes);

        return true;
}

/* If DSC is possbile, get DSC bandwidth range based on [min_bpp, max_bpp] target bitrate range and
 * timing's pixel clock and uncompressed bandwidth.
 * If DSC is not possible, leave '*range' untouched.
 */
bool dc_dsc_compute_bandwidth_range(
                const struct display_stream_compressor *dsc,
                uint32_t dsc_min_slice_height_override,
                uint32_t min_bpp_x16,
                uint32_t max_bpp_x16,
                const struct dsc_dec_dpcd_caps *dsc_sink_caps,
                const struct dc_crtc_timing *timing,
                const enum dc_link_encoding_format link_encoding,
                struct dc_dsc_bw_range *range)
{
        bool is_dsc_possible = false;
        unsigned int min_dsc_slice_count;
        struct dsc_enc_caps dsc_enc_caps;
        struct dsc_enc_caps dsc_common_caps;
        struct dc_dsc_config config = {0};
        struct dc_dsc_config_options options = {0};

        options.dsc_min_slice_height_override = dsc_min_slice_height_override;
        options.max_target_bpp_limit_override_x16 = max_bpp_x16;
        options.slice_height_granularity = 1;

        get_dsc_enc_caps(dsc, &dsc_enc_caps, timing->pix_clk_100hz);

        min_dsc_slice_count = get_min_dsc_slice_count_for_odm(dsc, &dsc_enc_caps, timing);

        is_dsc_possible = intersect_dsc_caps(dsc_sink_caps, &dsc_enc_caps,
                        timing->pixel_encoding, &dsc_common_caps);

        if (is_dsc_possible)
                is_dsc_possible = setup_dsc_config(dsc_sink_caps, &dsc_enc_caps, 0, timing,
                                &options, link_encoding, min_dsc_slice_count, &config);

        if (is_dsc_possible)
                is_dsc_possible = decide_dsc_bandwidth_range(min_bpp_x16, max_bpp_x16,
                                config.num_slices_h, &dsc_common_caps, timing, link_encoding, range);

        return is_dsc_possible;
}

void dc_dsc_dump_encoder_caps(const struct display_stream_compressor *dsc,
                              const struct dc_crtc_timing *timing)
{
        struct dsc_enc_caps dsc_enc_caps;

        get_dsc_enc_caps(dsc, &dsc_enc_caps, timing->pix_clk_100hz);

        DC_LOG_DSC("dsc encoder caps:");
        DC_LOG_DSC("\tdsc_version 0x%x", dsc_enc_caps.dsc_version);
        DC_LOG_DSC("\tslice_caps 0x%x", dsc_enc_caps.slice_caps.raw);
        DC_LOG_DSC("\tlb_bit_depth %d", dsc_enc_caps.lb_bit_depth);
        DC_LOG_DSC("\tis_block_pred_supported %d", dsc_enc_caps.is_block_pred_supported);
        DC_LOG_DSC("\tcolor_formats 0x%x", dsc_enc_caps.color_formats.raw);
        DC_LOG_DSC("\tcolor_depth 0x%x", dsc_enc_caps.color_depth.raw);
        DC_LOG_DSC("\tmax_total_throughput_mps %d", dsc_enc_caps.max_total_throughput_mps);
        DC_LOG_DSC("\tmax_slice_width %d", dsc_enc_caps.max_slice_width);
        DC_LOG_DSC("\tbpp_increment_div %d", dsc_enc_caps.bpp_increment_div);
}

void dc_dsc_dump_decoder_caps(const struct display_stream_compressor *dsc,
                              const struct dsc_dec_dpcd_caps *dsc_sink_caps)
{
        DC_LOG_DSC("dsc decoder caps:");
        DC_LOG_DSC("\tis_dsc_supported %d", dsc_sink_caps->is_dsc_supported);
        DC_LOG_DSC("\tdsc_version 0x%x", dsc_sink_caps->dsc_version);
        DC_LOG_DSC("\trc_buffer_size %d", dsc_sink_caps->rc_buffer_size);
        DC_LOG_DSC("\tslice_caps1 0x%x", dsc_sink_caps->slice_caps1.raw);
        DC_LOG_DSC("\tslice_caps2 0x%x", dsc_sink_caps->slice_caps2.raw);
        DC_LOG_DSC("\tlb_bit_depth %d", dsc_sink_caps->lb_bit_depth);
        DC_LOG_DSC("\tis_block_pred_supported %d", dsc_sink_caps->is_block_pred_supported);
        DC_LOG_DSC("\tedp_max_bits_per_pixel %d", dsc_sink_caps->edp_max_bits_per_pixel);
        DC_LOG_DSC("\tcolor_formats 0x%x", dsc_sink_caps->color_formats.raw);
        DC_LOG_DSC("\tthroughput_mode_0_mps %d", dsc_sink_caps->throughput_mode_0_mps);
        DC_LOG_DSC("\tthroughput_mode_1_mps %d", dsc_sink_caps->throughput_mode_1_mps);
        DC_LOG_DSC("\tmax_slice_width %d", dsc_sink_caps->max_slice_width);
        DC_LOG_DSC("\tbpp_increment_div %d", dsc_sink_caps->bpp_increment_div);
        DC_LOG_DSC("\tbranch_overall_throughput_0_mps %d", dsc_sink_caps->branch_overall_throughput_0_mps);
        DC_LOG_DSC("\tbranch_overall_throughput_1_mps %d", dsc_sink_caps->branch_overall_throughput_1_mps);
        DC_LOG_DSC("\tbranch_max_line_width %d", dsc_sink_caps->branch_max_line_width);
        DC_LOG_DSC("\tis_dp %d", dsc_sink_caps->is_dp);
}


static void build_dsc_enc_combined_slice_caps(
                const struct dsc_enc_caps *single_dsc_enc_caps,
                struct dsc_enc_caps *dsc_enc_caps,
                unsigned int max_odm_combine_factor)
{
        /* 1-16 slice configurations, single DSC */
        dsc_enc_caps->slice_caps.raw |= single_dsc_enc_caps->slice_caps.raw;

        /* 2x DSC's */
        if (max_odm_combine_factor >= 2) {
                /* 1 + 1 */
                dsc_enc_caps->slice_caps.bits.NUM_SLICES_2 |= single_dsc_enc_caps->slice_caps.bits.NUM_SLICES_1;

                /* 2 + 2 */
                dsc_enc_caps->slice_caps.bits.NUM_SLICES_4 |= single_dsc_enc_caps->slice_caps.bits.NUM_SLICES_2;

                /* 4 + 4 */
                dsc_enc_caps->slice_caps.bits.NUM_SLICES_8 |= single_dsc_enc_caps->slice_caps.bits.NUM_SLICES_4;

                /* 8 + 8 */
                dsc_enc_caps->slice_caps.bits.NUM_SLICES_16 |= single_dsc_enc_caps->slice_caps.bits.NUM_SLICES_8;
        }

        /* 3x DSC's */
        if (max_odm_combine_factor >= 3) {
                /* 4 + 4 + 4 */
                dsc_enc_caps->slice_caps.bits.NUM_SLICES_12 |= single_dsc_enc_caps->slice_caps.bits.NUM_SLICES_4;
        }

        /* 4x DSC's */
        if (max_odm_combine_factor >= 4) {
                /* 1 + 1 + 1 + 1 */
                dsc_enc_caps->slice_caps.bits.NUM_SLICES_4 |= single_dsc_enc_caps->slice_caps.bits.NUM_SLICES_1;

                /* 2 + 2 + 2 + 2 */
                dsc_enc_caps->slice_caps.bits.NUM_SLICES_8 |= single_dsc_enc_caps->slice_caps.bits.NUM_SLICES_2;

                /* 3 + 3 + 3 + 3 */
                dsc_enc_caps->slice_caps.bits.NUM_SLICES_12 |= single_dsc_enc_caps->slice_caps.bits.NUM_SLICES_3;

                /* 4 + 4 + 4 + 4 */
                dsc_enc_caps->slice_caps.bits.NUM_SLICES_16 |= single_dsc_enc_caps->slice_caps.bits.NUM_SLICES_4;
        }
}

static void build_dsc_enc_caps(
                const struct display_stream_compressor *dsc,
                struct dsc_enc_caps *dsc_enc_caps)
{
        unsigned int max_dscclk_khz;
        unsigned int num_dsc;
        unsigned int max_odm_combine_factor;
        struct dsc_enc_caps single_dsc_enc_caps;

        struct dc *dc;

        if (!dsc || !dsc->ctx || !dsc->ctx->dc || !dsc->funcs->dsc_get_single_enc_caps)
                return;

        dc = dsc->ctx->dc;

        if (!dc->clk_mgr || !dc->clk_mgr->funcs->get_max_clock_khz || !dc->res_pool || dc->debug.disable_dsc)
                return;

        /* get max DSCCLK from clk_mgr */
        max_dscclk_khz = dc->clk_mgr->funcs->get_max_clock_khz(dc->clk_mgr, CLK_TYPE_DSCCLK);

        dsc->funcs->dsc_get_single_enc_caps(&single_dsc_enc_caps, max_dscclk_khz);

        /* global capabilities */
        dsc_enc_caps->dsc_version = single_dsc_enc_caps.dsc_version;
        dsc_enc_caps->lb_bit_depth = single_dsc_enc_caps.lb_bit_depth;
        dsc_enc_caps->is_block_pred_supported = single_dsc_enc_caps.is_block_pred_supported;
        dsc_enc_caps->max_slice_width = single_dsc_enc_caps.max_slice_width;
        dsc_enc_caps->bpp_increment_div = single_dsc_enc_caps.bpp_increment_div;
        dsc_enc_caps->color_formats.raw = single_dsc_enc_caps.color_formats.raw;
        dsc_enc_caps->color_depth.raw = single_dsc_enc_caps.color_depth.raw;

        /* expand per DSC capabilities to global */
        max_odm_combine_factor = dc->caps.max_odm_combine_factor;
        num_dsc = dc->res_pool->res_cap->num_dsc;
        max_odm_combine_factor = min(max_odm_combine_factor, num_dsc);
        dsc_enc_caps->max_total_throughput_mps =
                        single_dsc_enc_caps.max_total_throughput_mps *
                        max_odm_combine_factor;

        /* check slice counts possible for with ODM combine */
        build_dsc_enc_combined_slice_caps(&single_dsc_enc_caps, dsc_enc_caps, max_odm_combine_factor);
}

static inline uint32_t dsc_div_by_10_round_up(uint32_t value)
{
        return (value + 9) / 10;
}

static unsigned int get_min_dsc_slice_count_for_odm(
                const struct display_stream_compressor *dsc,
                const struct dsc_enc_caps *dsc_enc_caps,
                const struct dc_crtc_timing *timing)
{
        unsigned int max_dispclk_khz;

        /* get max pixel rate and combine caps */
        max_dispclk_khz = dsc_enc_caps->max_total_throughput_mps * 1000;
        if (dsc && dsc->ctx->dc) {
                if (dsc->ctx->dc->clk_mgr &&
                        dsc->ctx->dc->clk_mgr->funcs->get_max_clock_khz) {
                        /* dispclk is available */
                        max_dispclk_khz = dsc->ctx->dc->clk_mgr->funcs->get_max_clock_khz(dsc->ctx->dc->clk_mgr, CLK_TYPE_DISPCLK);
                }
        }

        /* validate parameters */
        if (max_dispclk_khz == 0 || dsc_enc_caps->max_slice_width == 0)
                return 1;

        /* consider minimum odm slices required due to
         * 1) display pipe throughput (dispclk)
         * 2) max image width per slice
         */
        return dc_fixpt_ceil(dc_fixpt_max(
                        dc_fixpt_div_int(dc_fixpt_from_int(dsc_div_by_10_round_up(timing->pix_clk_100hz)),
                        max_dispclk_khz), // throughput
                        dc_fixpt_div_int(dc_fixpt_from_int(timing->h_addressable + timing->h_border_left + timing->h_border_right),
                        dsc_enc_caps->max_slice_width))); // slice width
}

static void get_dsc_enc_caps(
                const struct display_stream_compressor *dsc,
                struct dsc_enc_caps *dsc_enc_caps,
                int pixel_clock_100Hz)
{
        memset(dsc_enc_caps, 0, sizeof(struct dsc_enc_caps));

        if (!dsc || !dsc->ctx || !dsc->ctx->dc || dsc->ctx->dc->debug.disable_dsc)
                return;

        /* check if reported cap global or only for a single DCN DSC enc */
        if (dsc->funcs->dsc_get_enc_caps) {
                dsc->funcs->dsc_get_enc_caps(dsc_enc_caps, pixel_clock_100Hz);
        } else {
                build_dsc_enc_caps(dsc, dsc_enc_caps);
        }
}

/* Returns 'false' if no intersection was found for at least one capability.
 * It also implicitly validates some sink caps against invalid value of zero.
 */
static bool intersect_dsc_caps(
                const struct dsc_dec_dpcd_caps *dsc_sink_caps,
                const struct dsc_enc_caps *dsc_enc_caps,
                enum dc_pixel_encoding pixel_encoding,
                struct dsc_enc_caps *dsc_common_caps)
{
        int32_t max_slices;
        int32_t total_sink_throughput;

        memset(dsc_common_caps, 0, sizeof(struct dsc_enc_caps));

        dsc_common_caps->dsc_version = min(dsc_sink_caps->dsc_version, dsc_enc_caps->dsc_version);
        if (!dsc_common_caps->dsc_version)
                return false;

        dsc_common_caps->slice_caps.bits.NUM_SLICES_1 =
                dsc_sink_caps->slice_caps1.bits.NUM_SLICES_1 && dsc_enc_caps->slice_caps.bits.NUM_SLICES_1;
        dsc_common_caps->slice_caps.bits.NUM_SLICES_2 =
                dsc_sink_caps->slice_caps1.bits.NUM_SLICES_2 && dsc_enc_caps->slice_caps.bits.NUM_SLICES_2;
        dsc_common_caps->slice_caps.bits.NUM_SLICES_4 =
                dsc_sink_caps->slice_caps1.bits.NUM_SLICES_4 && dsc_enc_caps->slice_caps.bits.NUM_SLICES_4;
        dsc_common_caps->slice_caps.bits.NUM_SLICES_8 =
                dsc_sink_caps->slice_caps1.bits.NUM_SLICES_8 && dsc_enc_caps->slice_caps.bits.NUM_SLICES_8;
        dsc_common_caps->slice_caps.bits.NUM_SLICES_12 =
                dsc_sink_caps->slice_caps1.bits.NUM_SLICES_12 && dsc_enc_caps->slice_caps.bits.NUM_SLICES_12;
        dsc_common_caps->slice_caps.bits.NUM_SLICES_16 =
                dsc_sink_caps->slice_caps2.bits.NUM_SLICES_16 && dsc_enc_caps->slice_caps.bits.NUM_SLICES_16;

        if (!dsc_common_caps->slice_caps.raw)
                return false;

        dsc_common_caps->lb_bit_depth = min(dsc_sink_caps->lb_bit_depth, dsc_enc_caps->lb_bit_depth);
        if (!dsc_common_caps->lb_bit_depth)
                return false;

        dsc_common_caps->is_block_pred_supported =
                dsc_sink_caps->is_block_pred_supported && dsc_enc_caps->is_block_pred_supported;

        dsc_common_caps->color_formats.raw = dsc_sink_caps->color_formats.raw & dsc_enc_caps->color_formats.raw;
        if (!dsc_common_caps->color_formats.raw)
                return false;

        dsc_common_caps->color_depth.raw = dsc_sink_caps->color_depth.raw & dsc_enc_caps->color_depth.raw;
        if (!dsc_common_caps->color_depth.raw)
                return false;

        max_slices = 0;
        if (dsc_common_caps->slice_caps.bits.NUM_SLICES_1)
                max_slices = 1;

        if (dsc_common_caps->slice_caps.bits.NUM_SLICES_2)
                max_slices = 2;

        if (dsc_common_caps->slice_caps.bits.NUM_SLICES_4)
                max_slices = 4;

        total_sink_throughput = max_slices * dsc_sink_caps->throughput_mode_0_mps;
        if (pixel_encoding == PIXEL_ENCODING_YCBCR422 || pixel_encoding == PIXEL_ENCODING_YCBCR420)
                total_sink_throughput = max_slices * dsc_sink_caps->throughput_mode_1_mps;

        dsc_common_caps->max_total_throughput_mps = min(total_sink_throughput, dsc_enc_caps->max_total_throughput_mps);

        dsc_common_caps->max_slice_width = min(dsc_sink_caps->max_slice_width, dsc_enc_caps->max_slice_width);
        if (!dsc_common_caps->max_slice_width)
                return false;

        dsc_common_caps->bpp_increment_div = min(dsc_sink_caps->bpp_increment_div, dsc_enc_caps->bpp_increment_div);

        // TODO DSC: Remove this workaround for N422 and 420 once it's fixed, or move it to get_dsc_encoder_caps()
        if (pixel_encoding == PIXEL_ENCODING_YCBCR422 || pixel_encoding == PIXEL_ENCODING_YCBCR420)
                dsc_common_caps->bpp_increment_div = min(dsc_common_caps->bpp_increment_div, (uint32_t)8);

        dsc_common_caps->is_frl = dsc_sink_caps->is_frl;
        dsc_common_caps->is_vic_all_bpp = dsc_sink_caps->is_vic_all_bpp;
        dsc_common_caps->total_chunk_kbytes = dsc_sink_caps->total_chunk_kbytes;
        dsc_common_caps->edp_sink_max_bits_per_pixel = dsc_sink_caps->edp_max_bits_per_pixel;
        dsc_common_caps->is_dp = dsc_sink_caps->is_dp;
        return true;
}

static uint32_t compute_bpp_x16_from_target_bandwidth(
        const uint32_t bandwidth_in_kbps,
        const struct dc_crtc_timing *timing,
        const uint32_t num_slices_h,
        const uint32_t bpp_increment_div,
        const bool is_dp)
{
        uint32_t overhead_in_kbps;
        struct fixed31_32 effective_bandwidth_in_kbps;
        struct fixed31_32 bpp_x16;

        overhead_in_kbps = dc_dsc_stream_bandwidth_overhead_in_kbps(
                                timing, num_slices_h, is_dp);
        effective_bandwidth_in_kbps = dc_fixpt_from_int(bandwidth_in_kbps);
        effective_bandwidth_in_kbps = dc_fixpt_sub_int(effective_bandwidth_in_kbps,
                        overhead_in_kbps);
        bpp_x16 = dc_fixpt_mul_int(effective_bandwidth_in_kbps, 10);
        bpp_x16 = dc_fixpt_div_int(bpp_x16, timing->pix_clk_100hz);
        bpp_x16 = dc_fixpt_from_int(dc_fixpt_floor(dc_fixpt_mul_int(bpp_x16, bpp_increment_div)));
        bpp_x16 = dc_fixpt_div_int(bpp_x16, bpp_increment_div);
        bpp_x16 = dc_fixpt_mul_int(bpp_x16, 16);
        return dc_fixpt_floor(bpp_x16);
}

static bool convert_bandwidth_to_frl_params(
        int bandwidth_kbps,
        int *num_lanes,
        int *frl_rate)
{
        if (bandwidth_kbps == 0)
                return false;

        switch (bandwidth_kbps) {
        case 9000000:
                *num_lanes = 3;
                *frl_rate = 3000;
                break;
        case 18000000:
                *num_lanes = 3;
                *frl_rate = 6000;
                break;
        case 24000000:
                *num_lanes = 4;
                *frl_rate = 6000;
                break;
        case 32000000:
                *num_lanes = 4;
                *frl_rate = 8000;
                break;
        case 40000000:
                *num_lanes = 4;
                *frl_rate = 10000;
                break;
        case 48000000:
                *num_lanes = 4;
                *frl_rate = 12000;
                break;
        default:
                return false;
        }
        return true;
}

static uint32_t compute_bpp_x16_from_frl_params(
                const struct dc_crtc_timing *timing,
                const uint32_t num_slices_h,
                const struct dsc_enc_caps *dsc_caps)
{
        struct fixed31_32 pixel_clock;
        uint32_t num_lanes = dsc_caps->num_lanes;
        uint32_t frl_rate = dsc_caps->frl_rate;
        uint32_t h_active = timing->h_addressable;
        uint32_t h_blank = timing->h_total - timing->h_addressable;
        uint32_t bpp_target_x16;
        struct fixed31_32 r_bit;
        uint32_t f_audio = 48000;
        struct fixed31_32 pixel_rate_tolerance;
        uint32_t audio_tolerance = 1000;
        uint32_t frl_bit_tolerance = 300;
        uint32_t acr_rate_max = 1500;
        uint32_t c_frl_cb = 510;
        uint32_t c_frl_sb;
        struct fixed31_32 overhead_sb;
        struct fixed31_32 overhead_rs;
        struct fixed31_32 overhead_map;
        struct fixed31_32 overhead_min;
        struct fixed31_32 overhead_m;
        struct fixed31_32 overhead_max;
        struct fixed31_32 pixel_clock_max;
        struct fixed31_32 t_line;
        struct fixed31_32 r_bit_min;
        struct fixed31_32 r_frl_char_min;
        struct fixed31_32 c_frl_line;
        uint32_t c_frl_line_int;
        struct fixed31_32 c_frl_available;
        uint32_t c_frl_av_int;
        struct fixed31_32 c_frl_active_av;
        struct fixed31_32 c_frl_blank_av;
        uint32_t acat_ap = 4;
        struct fixed31_32 r_ap;
        struct fixed31_32 max_audio_tol_rate;
        struct fixed31_32 avg_audio_packets_line;
        uint32_t avg_audio_packets_line_int;
        int hc_blank_audio_min;
        uint32_t bytes_target;
        uint32_t hc_active_target;
        uint32_t hc_blank_target_est1;
        uint32_t hc_blank_target_est2;
        struct fixed31_32 hc_blank_target_bandwidth;
        int hc_blank_target;
        uint32_t bpc_factor = 8;
        uint32_t min_dsc_bpp_x16;
        uint32_t max_dsc_bpp_x16;
        bool hdmi_all_bpp = dsc_caps->is_vic_all_bpp;
        uint32_t slice_width;

        if (timing->display_color_depth == COLOR_DEPTH_101010)
                bpc_factor = 10;
        if (timing->display_color_depth == COLOR_DEPTH_121212)
                bpc_factor = 12;

        /* Assuming: bpc as 8*/
        if (timing->pixel_encoding == PIXEL_ENCODING_RGB ||
                        timing->pixel_encoding == PIXEL_ENCODING_YCBCR444) {
                min_dsc_bpp_x16 = 8 * 16;
                max_dsc_bpp_x16 = 3 * 16 * bpc_factor;
        } else if (timing->pixel_encoding == PIXEL_ENCODING_YCBCR422) {
                min_dsc_bpp_x16 = 7 * 16;
                max_dsc_bpp_x16 = 2 * 16 * bpc_factor;
        } else {
                min_dsc_bpp_x16 = 6 * 16;
                max_dsc_bpp_x16 = 3 * 16 * bpc_factor / 2;
        }

        max_dsc_bpp_x16 = MIN(max_dsc_bpp_x16, 256);
        if (!hdmi_all_bpp)
                max_dsc_bpp_x16 = MIN(max_dsc_bpp_x16, 192);

        c_frl_sb = 4 * c_frl_cb + num_lanes;
        pixel_clock = dc_fixpt_div_int(dc_fixpt_from_int(timing->pix_clk_100hz), 10000);
        r_bit = dc_fixpt_from_int(frl_rate);
        pixel_rate_tolerance = dc_fixpt_div_int(dc_fixpt_from_int(5), 1000);
        overhead_sb = dc_fixpt_div_int(dc_fixpt_from_int(num_lanes), c_frl_sb);
        overhead_rs = dc_fixpt_div_int(dc_fixpt_from_int(32), c_frl_sb);
        overhead_map = dc_fixpt_div_int(dc_fixpt_from_int(25), (c_frl_sb * 10));
        overhead_min = dc_fixpt_add(overhead_sb, overhead_rs);
        overhead_min = dc_fixpt_add(overhead_min, overhead_map);
        overhead_m = dc_fixpt_div_int(dc_fixpt_from_int(3), 1000);
        overhead_max = dc_fixpt_add(overhead_min, overhead_m);
        pixel_rate_tolerance = dc_fixpt_add_int(pixel_rate_tolerance, 1);
        pixel_clock_max = dc_fixpt_mul(pixel_clock, pixel_rate_tolerance);
        t_line = dc_fixpt_div(dc_fixpt_from_int(h_active + h_blank), pixel_clock_max);
        r_bit_min = dc_fixpt_div_int(dc_fixpt_from_int(frl_bit_tolerance), 1000000);
        r_bit_min = dc_fixpt_sub(dc_fixpt_from_int(1), r_bit_min);
        r_bit_min = dc_fixpt_mul(r_bit, r_bit_min);
        r_frl_char_min = dc_fixpt_div_int(r_bit_min, 18);
        c_frl_line = dc_fixpt_mul(t_line, r_frl_char_min);
        c_frl_line = dc_fixpt_mul_int(c_frl_line, num_lanes);
        c_frl_line_int = dc_fixpt_floor(c_frl_line);
        c_frl_available = dc_fixpt_sub(dc_fixpt_from_int(1), overhead_max);
        c_frl_available = dc_fixpt_mul_int(c_frl_available, c_frl_line_int);
        c_frl_av_int = dc_fixpt_floor(c_frl_available);
        c_frl_active_av = dc_fixpt_mul_int(dc_fixpt_from_int(c_frl_av_int), h_active);
        c_frl_active_av = dc_fixpt_div_int(c_frl_active_av, (h_active + h_blank));
        c_frl_blank_av = dc_fixpt_mul_int(dc_fixpt_from_int(c_frl_av_int), h_blank);
        c_frl_blank_av =  dc_fixpt_div_int(c_frl_blank_av, (h_active + h_blank));
        r_ap = dc_fixpt_max(dc_fixpt_from_int(192000),
                        dc_fixpt_from_int(f_audio * acat_ap));
        r_ap = dc_fixpt_add(r_ap, dc_fixpt_from_int(2 * acr_rate_max));
        max_audio_tol_rate =  dc_fixpt_div_int(dc_fixpt_from_int(audio_tolerance), 1000000);
        max_audio_tol_rate =  dc_fixpt_add(dc_fixpt_from_int(1), max_audio_tol_rate);
        r_ap = dc_fixpt_mul(r_ap, max_audio_tol_rate);
        avg_audio_packets_line = dc_fixpt_mul(r_ap, t_line);
        avg_audio_packets_line = dc_fixpt_div_int(avg_audio_packets_line, 1000000);
        avg_audio_packets_line_int = dc_fixpt_ceil(avg_audio_packets_line);
        hc_blank_audio_min = 32 + 32 * avg_audio_packets_line_int;
        slice_width = dc_fixpt_ceil(dc_fixpt_div_int(
                        dc_fixpt_from_int(h_active), num_slices_h));

        /* Slice width for 420 must be even */
        if (timing->pixel_encoding == PIXEL_ENCODING_YCBCR420 && slice_width % 2 != 0) {
                slice_width++;
        }

        for (uint32_t i = max_dsc_bpp_x16; i >= min_dsc_bpp_x16; i--) {
                bpp_target_x16 = i;
                bytes_target = num_slices_h * dc_fixpt_ceil(dc_fixpt_div_int(
                                dc_fixpt_from_int(bpp_target_x16 * slice_width), 8 * 16));
                hc_active_target = dc_fixpt_ceil(dc_fixpt_div_int(
                                dc_fixpt_from_int(bytes_target), 3));
                hc_blank_target_est1 = dc_fixpt_ceil(dc_fixpt_div_int(
                                dc_fixpt_from_int(hc_active_target * h_blank), h_active));
                hc_blank_target_est2 = dc_fixpt_floor(dc_fixpt_max(
                                dc_fixpt_from_int(hc_blank_target_est1),
                                dc_fixpt_from_int(hc_blank_audio_min)));
                hc_blank_target_bandwidth = dc_fixpt_div_int(dc_fixpt_from_int(3), 2);
                hc_blank_target_bandwidth = dc_fixpt_mul(hc_blank_target_bandwidth,
                                dc_fixpt_from_int(hc_active_target));
                hc_blank_target_bandwidth = dc_fixpt_sub(dc_fixpt_from_int(c_frl_av_int),
                                hc_blank_target_bandwidth);
                hc_blank_target_bandwidth = dc_fixpt_min(hc_blank_target_bandwidth,
                                dc_fixpt_from_int(hc_blank_target_est2));
                hc_blank_target_bandwidth = dc_fixpt_div_int(hc_blank_target_bandwidth, 4);
                hc_blank_target = dc_fixpt_floor(hc_blank_target_bandwidth) * 4;
                if (hc_blank_target >= hc_blank_audio_min)
                        return bpp_target_x16;
        }
        return 0;
}
/* Decide DSC bandwidth range based on signal, timing, specs specific and input min and max
 * requirements.
 * The range output includes decided min/max target bpp, the respective bandwidth requirements
 * and native timing bandwidth requirement when DSC is not used.
 */
static bool decide_dsc_bandwidth_range(
                const uint32_t min_bpp_x16,
                const uint32_t max_bpp_x16,
                const uint32_t num_slices_h,
                const struct dsc_enc_caps *dsc_caps,
                const struct dc_crtc_timing *timing,
                const enum dc_link_encoding_format link_encoding,
                struct dc_dsc_bw_range *range)
{
        uint32_t preferred_bpp_x16 = timing->dsc_fixed_bits_per_pixel_x16;

        memset(range, 0, sizeof(*range));

        /* apply signal, timing, specs and explicitly specified DSC range requirements */
        if (preferred_bpp_x16) {
                if (preferred_bpp_x16 <= max_bpp_x16 &&
                                preferred_bpp_x16 >= min_bpp_x16) {
                        range->max_target_bpp_x16 = preferred_bpp_x16;
                        range->min_target_bpp_x16 = preferred_bpp_x16;
                }
        }
        else if (dsc_caps->is_frl) {
                uint32_t specs_preferred_bpp_x16 = hdmi_dsc_get_bpp(timing, dsc_caps);
                uint32_t specs_calculated_bpp_x16 = 0;

                if (timing->vic) {
                        /* For CTA timing, we should strictly follow HDMI spec. */
                        range->max_target_bpp_x16 = specs_preferred_bpp_x16;
                        if (dsc_caps->is_vic_all_bpp || dsc_caps->is_dp)
                                range->min_target_bpp_x16 = min_bpp_x16;
                        else
                                range->min_target_bpp_x16 = specs_preferred_bpp_x16;
                } else {
                        if (timing->vic == 0 && timing->hdmi_vic == 0)
                                specs_calculated_bpp_x16 = compute_bpp_x16_from_frl_params(
                                                timing, num_slices_h, dsc_caps);

                        if (specs_calculated_bpp_x16 != 0)
                                specs_preferred_bpp_x16 = MIN(specs_calculated_bpp_x16,
                                                specs_preferred_bpp_x16);

                        range->max_target_bpp_x16 = MIN(max_bpp_x16, specs_preferred_bpp_x16);
                        range->min_target_bpp_x16 = min_bpp_x16;
                }
        }
        /* TODO - make this value generic to all signal types */
        else if (dsc_caps->edp_sink_max_bits_per_pixel) {
                /* apply max bpp limitation from edp sink */
                range->max_target_bpp_x16 = MIN(dsc_caps->edp_sink_max_bits_per_pixel,
                                max_bpp_x16);
                range->min_target_bpp_x16 = min_bpp_x16;
        }
        else {
                range->max_target_bpp_x16 = max_bpp_x16;
                range->min_target_bpp_x16 = min_bpp_x16;
        }

        /* populate output structure */
        if (range->max_target_bpp_x16 >= range->min_target_bpp_x16 && range->min_target_bpp_x16 > 0) {
                /* native stream bandwidth */
                range->stream_kbps = dc_bandwidth_in_kbps_from_timing(timing, link_encoding);

                /* max dsc target bpp */
                range->max_kbps = dc_dsc_stream_bandwidth_in_kbps(timing,
                                range->max_target_bpp_x16, num_slices_h, dsc_caps->is_dp);

                /* min dsc target bpp */
                range->min_kbps = dc_dsc_stream_bandwidth_in_kbps(timing,
                                range->min_target_bpp_x16, num_slices_h, dsc_caps->is_dp);
        }

        return range->max_kbps >= range->min_kbps && range->min_kbps > 0;
}

/* Decides if DSC should be used and calculates target bpp if it should, applying DSC policy.
 *
 * Returns:
 *     - 'true' if target bpp is decided
 *     - 'false' if target bpp cannot be decided (e.g. cannot fit even with min DSC bpp),
 */
static bool decide_dsc_target_bpp_x16(
                const struct dc_dsc_policy *policy,
                const struct dc_dsc_config_options *options,
                const struct dsc_enc_caps *dsc_common_caps,
                const int target_bandwidth_kbps,
                const struct dc_crtc_timing *timing,
                const int num_slices_h,
                const enum dc_link_encoding_format link_encoding,
                int *target_bpp_x16)
{
        struct dc_dsc_bw_range range;
        uint32_t target_bandwidth_kbps_u = (uint32_t)target_bandwidth_kbps;

        *target_bpp_x16 = 0;

        if (decide_dsc_bandwidth_range(policy->min_target_bpp * 16, policy->max_target_bpp * 16,
                        num_slices_h, dsc_common_caps, timing, link_encoding, &range)) {
                if (target_bandwidth_kbps_u >= range.stream_kbps) {
                        if (policy->enable_dsc_when_not_needed || options->force_dsc_when_not_needed)
                                /* enable max bpp even dsc is not needed */
                                *target_bpp_x16 = range.max_target_bpp_x16;
                } else if (target_bandwidth_kbps_u >= range.max_kbps) {
                        /* use max target bpp allowed */
                        *target_bpp_x16 = range.max_target_bpp_x16;
                } else if (target_bandwidth_kbps_u >= range.min_kbps) {
                        /* use target bpp that can take entire target bandwidth */
                        *target_bpp_x16 = compute_bpp_x16_from_target_bandwidth(
                                        target_bandwidth_kbps, timing, num_slices_h,
                                        dsc_common_caps->bpp_increment_div,
                                        dsc_common_caps->is_dp);
                }
                /* Assign minimum bpp and validate TB borrow scenario later */
                if (target_bandwidth_kbps < range.min_kbps)
                        if (dsc_common_caps->is_frl)
                                *target_bpp_x16 = range.min_target_bpp_x16;
        }

        return *target_bpp_x16 != 0;
}

#define MIN_AVAILABLE_SLICES_SIZE  6

static int get_available_dsc_slices(union dsc_enc_slice_caps slice_caps, int *available_slices)
{
        int idx = 0;

        if (slice_caps.bits.NUM_SLICES_1)
                available_slices[idx++] = 1;

        if (slice_caps.bits.NUM_SLICES_2)
                available_slices[idx++] = 2;

        if (slice_caps.bits.NUM_SLICES_4)
                available_slices[idx++] = 4;

        if (slice_caps.bits.NUM_SLICES_8)
                available_slices[idx++] = 8;

        if (slice_caps.bits.NUM_SLICES_12)
                available_slices[idx++] = 12;

        if (slice_caps.bits.NUM_SLICES_16)
                available_slices[idx++] = 16;

        return idx;
}


static int get_max_dsc_slices(union dsc_enc_slice_caps slice_caps)
{
        int max_slices = 0;
        int available_slices[MIN_AVAILABLE_SLICES_SIZE];
        int end_idx = get_available_dsc_slices(slice_caps, &available_slices[0]);

        if (end_idx > 0)
                max_slices = available_slices[end_idx - 1];

        return max_slices;
}


// Increment slice number in available slice numbers stops if possible, or just increment if not
static int inc_num_slices(union dsc_enc_slice_caps slice_caps, int num_slices)
{
        // Get next bigger num slices available in common caps
        int available_slices[MIN_AVAILABLE_SLICES_SIZE];
        int end_idx;
        int i;
        int new_num_slices = num_slices;

        end_idx = get_available_dsc_slices(slice_caps, &available_slices[0]);
        if (end_idx == 0) {
                // No available slices found
                new_num_slices++;
                return new_num_slices;
        }

        // Numbers of slices found - get the next bigger number
        for (i = 0; i < end_idx; i++) {
                if (new_num_slices < available_slices[i]) {
                        new_num_slices = available_slices[i];
                        break;
                }
        }

        if (new_num_slices == num_slices) // No bigger number of slices found
                new_num_slices++;

        return new_num_slices;
}


// Decrement slice number in available slice numbers stops if possible, or just decrement if not. Stop at zero.
static int dec_num_slices(union dsc_enc_slice_caps slice_caps, int num_slices)
{
        // Get next bigger num slices available in common caps
        int available_slices[MIN_AVAILABLE_SLICES_SIZE];
        int end_idx;
        int i;
        int new_num_slices = num_slices;

        end_idx = get_available_dsc_slices(slice_caps, &available_slices[0]);
        if (end_idx == 0 && new_num_slices > 0) {
                // No numbers of slices found
                new_num_slices++;
                return new_num_slices;
        }

        // Numbers of slices found - get the next smaller number
        for (i = end_idx - 1; i >= 0; i--) {
                if (new_num_slices > available_slices[i]) {
                        new_num_slices = available_slices[i];
                        break;
                }
        }

        if (new_num_slices == num_slices) {
                // No smaller number of slices found
                new_num_slices--;
                if (new_num_slices < 0)
                        new_num_slices = 0;
        }

        return new_num_slices;
}


// Choose next bigger number of slices if the requested number of slices is not available
static int fit_num_slices_up(union dsc_enc_slice_caps slice_caps, int num_slices)
{
        // Get next bigger num slices available in common caps
        int available_slices[MIN_AVAILABLE_SLICES_SIZE];
        int end_idx;
        int i;
        int new_num_slices = num_slices;

        end_idx = get_available_dsc_slices(slice_caps, &available_slices[0]);
        if (end_idx == 0) {
                // No available slices found
                new_num_slices++;
                return new_num_slices;
        }

        // Numbers of slices found - get the equal or next bigger number
        for (i = 0; i < end_idx; i++) {
                if (new_num_slices <= available_slices[i]) {
                        new_num_slices = available_slices[i];
                        break;
                }
        }

        return new_num_slices;
}


/* Attempts to set DSC configuration for the stream, applying DSC policy.
 * Returns 'true' if successful or 'false' if not.
 *
 * Parameters:
 *
 * dsc_sink_caps       - DSC sink decoder capabilities (from DPCD)
 *
 * dsc_enc_caps        - DSC encoder capabilities
 *
 * target_bandwidth_kbps  - Target bandwidth to fit the stream into.
 *                          If 0, do not calculate target bpp.
 *
 * timing              - The stream timing to fit into 'target_bandwidth_kbps' or apply
 *                       maximum compression to, if 'target_badwidth == 0'
 *
 * dsc_cfg             - DSC configuration to use if it was possible to come up with
 *                       one for the given inputs.
 *                       The target bitrate after DSC can be calculated by multiplying
 *                       dsc_cfg.bits_per_pixel (in U6.4 format) by pixel rate, e.g.
 *
 *                       dsc_stream_bitrate_kbps = (int)ceil(timing->pix_clk_khz * dsc_cfg.bits_per_pixel / 16.0);
 */
static bool setup_dsc_config(
                const struct dsc_dec_dpcd_caps *dsc_sink_caps,
                const struct dsc_enc_caps *dsc_enc_caps,
                int target_bandwidth_kbps,
                const struct dc_crtc_timing *timing,
                const struct dc_dsc_config_options *options,
                const enum dc_link_encoding_format link_encoding,
                int min_slices_h,
                struct dc_dsc_config *dsc_cfg)
{
        struct dsc_enc_caps dsc_common_caps;
        int max_slices_h = 0;
        int num_slices_h = 0;
        int pic_width;
        uint32_t pic_width_u;
        int slice_width;
        int target_bpp;
        int sink_per_slice_throughput_mps;
        uint32_t branch_max_throughput_mps = 0;
        bool is_dsc_possible = false;
        int pic_height;
        int slice_height;
        struct dc_dsc_policy policy;
        int num_lanes;
        int frl_rate;

        memset(dsc_cfg, 0, sizeof(struct dc_dsc_config));

        dc_dsc_get_policy_for_timing(timing, options->max_target_bpp_limit_override_x16, &policy, link_encoding);
        pic_width = timing->h_addressable + timing->h_border_left + timing->h_border_right;
        pic_width_u = (uint32_t)pic_width;
        pic_height = timing->v_addressable + timing->v_border_top + timing->v_border_bottom;

        if (!dsc_sink_caps->is_dsc_supported)
                goto done;

        if (dsc_sink_caps->branch_max_line_width && dsc_sink_caps->branch_max_line_width < pic_width_u)
                goto done;

        // Intersect decoder with encoder DSC caps and validate DSC settings
        is_dsc_possible = intersect_dsc_caps(dsc_sink_caps, dsc_enc_caps, timing->pixel_encoding, &dsc_common_caps);
        if (!is_dsc_possible)
                goto done;
        if (convert_bandwidth_to_frl_params(
                                        target_bandwidth_kbps, &num_lanes, &frl_rate)) {
                dsc_common_caps.num_lanes = num_lanes;
                dsc_common_caps.frl_rate = frl_rate;
        }

        sink_per_slice_throughput_mps = 0;

        // Validate available DSC settings against the mode timing

        // Validate color format (and pick up the throughput values)
        dsc_cfg->ycbcr422_simple = false;
        switch (timing->pixel_encoding) {
        case PIXEL_ENCODING_RGB:
                is_dsc_possible = (bool)dsc_common_caps.color_formats.bits.RGB;
                sink_per_slice_throughput_mps = dsc_sink_caps->throughput_mode_0_mps;
                branch_max_throughput_mps = dsc_sink_caps->branch_overall_throughput_0_mps;
                break;
        case PIXEL_ENCODING_YCBCR444:
                is_dsc_possible = (bool)dsc_common_caps.color_formats.bits.YCBCR_444;
                sink_per_slice_throughput_mps = dsc_sink_caps->throughput_mode_0_mps;
                branch_max_throughput_mps = dsc_sink_caps->branch_overall_throughput_0_mps;
                break;
        case PIXEL_ENCODING_YCBCR422:
                if (policy.ycbcr422_simple) {
                        is_dsc_possible = (bool)dsc_common_caps.color_formats.bits.YCBCR_SIMPLE_422;
                        dsc_cfg->ycbcr422_simple = is_dsc_possible;
                        sink_per_slice_throughput_mps = dsc_sink_caps->throughput_mode_0_mps;
                } else {
                        is_dsc_possible = (bool)dsc_common_caps.color_formats.bits.YCBCR_NATIVE_422;
                        sink_per_slice_throughput_mps = dsc_sink_caps->throughput_mode_1_mps;
                        branch_max_throughput_mps = dsc_sink_caps->branch_overall_throughput_1_mps;
                }
                break;
        case PIXEL_ENCODING_YCBCR420:
                is_dsc_possible = (bool)dsc_common_caps.color_formats.bits.YCBCR_NATIVE_420;
                sink_per_slice_throughput_mps = dsc_sink_caps->throughput_mode_1_mps;
                branch_max_throughput_mps = dsc_sink_caps->branch_overall_throughput_1_mps;
                break;
        default:
                is_dsc_possible = false;
        }

        // Validate branch's maximum throughput
        if (branch_max_throughput_mps && dsc_div_by_10_round_up(timing->pix_clk_100hz) > branch_max_throughput_mps * 1000)
                is_dsc_possible = false;

        if (!is_dsc_possible)
                goto done;

        // Color depth
        switch (timing->display_color_depth) {
        case COLOR_DEPTH_888:
                is_dsc_possible = (bool)dsc_common_caps.color_depth.bits.COLOR_DEPTH_8_BPC;
                break;
        case COLOR_DEPTH_101010:
                is_dsc_possible = (bool)dsc_common_caps.color_depth.bits.COLOR_DEPTH_10_BPC;
                break;
        case COLOR_DEPTH_121212:
                is_dsc_possible = (bool)dsc_common_caps.color_depth.bits.COLOR_DEPTH_12_BPC;
                break;
        default:
                is_dsc_possible = false;
        }

        if (!is_dsc_possible)
                goto done;

        // Slice width (i.e. number of slices per line)
        max_slices_h = get_max_dsc_slices(dsc_common_caps.slice_caps);

        while (max_slices_h > 0) {
                if (pic_width % max_slices_h == 0)
                        break;

                max_slices_h = dec_num_slices(dsc_common_caps.slice_caps, max_slices_h);
        }

        is_dsc_possible = (dsc_common_caps.max_slice_width > 0);
        if (!is_dsc_possible)
                goto done;

        /* increase minimum slice count to meet sink slice width limitations */
        min_slices_h = dc_fixpt_ceil(dc_fixpt_max(
                        dc_fixpt_div_int(dc_fixpt_from_int(pic_width), dsc_common_caps.max_slice_width), // sink min
                        dc_fixpt_from_int(min_slices_h))); // source min

        min_slices_h = fit_num_slices_up(dsc_common_caps.slice_caps, min_slices_h);

        /* increase minimum slice count to meet sink throughput limitations */
        while (min_slices_h <= max_slices_h) {
                int pix_clk_per_slice_khz = dsc_div_by_10_round_up(timing->pix_clk_100hz) / min_slices_h;
                if (pix_clk_per_slice_khz <= sink_per_slice_throughput_mps * 1000)
                        break;

                min_slices_h = inc_num_slices(dsc_common_caps.slice_caps, min_slices_h);
        }

        /* increase minimum slice count to meet divisibility requirements */
        while (pic_width % min_slices_h != 0 && min_slices_h <= max_slices_h) {
                min_slices_h = inc_num_slices(dsc_common_caps.slice_caps, min_slices_h);
        }

        is_dsc_possible = (min_slices_h <= max_slices_h) && max_slices_h != 0;
        if (!is_dsc_possible)
                goto done;

        if (policy.use_min_slices_h) {
                if (min_slices_h > 0)
                        num_slices_h = min_slices_h;
                else if (max_slices_h > 0) { // Fall back to max slices if min slices is not working out
                        if (policy.max_slices_h)
                                num_slices_h = min(policy.max_slices_h, max_slices_h);
                        else
                                num_slices_h = max_slices_h;
                } else
                        is_dsc_possible = false;
        } else {
                if (max_slices_h > 0) {
                        if (policy.max_slices_h)
                                num_slices_h = min(policy.max_slices_h, max_slices_h);
                        else
                                num_slices_h = max_slices_h;
                } else if (min_slices_h > 0) // Fall back to min slices if max slices is not possible
                        num_slices_h = min_slices_h;
                else
                        is_dsc_possible = false;
        }
        if (dsc_sink_caps->is_frl)
                num_slices_h = hdmi_dsc_get_num_slices(timing);
        // When we force ODM, num dsc h slices must be divisible by num odm h slices
        switch (options->dsc_force_odm_hslice_override) {
        case 0:
        case 1:
                break;
        case 2:
                if (num_slices_h < 2)
                        num_slices_h = fit_num_slices_up(dsc_common_caps.slice_caps, 2);
                break;
        case 3:
                if (dsc_common_caps.slice_caps.bits.NUM_SLICES_12)
                        num_slices_h = 12;
                else
                        num_slices_h = 0;
                break;
        case 4:
                if (num_slices_h < 4)
                        num_slices_h = fit_num_slices_up(dsc_common_caps.slice_caps, 4);
                break;
        default:
                break;
        }
        if (num_slices_h == 0)
                is_dsc_possible = false;
        if (!is_dsc_possible)
                goto done;

        dsc_cfg->num_slices_h = num_slices_h;
        slice_width = pic_width / num_slices_h;

        is_dsc_possible = slice_width <= dsc_common_caps.max_slice_width;
        if (!is_dsc_possible)
                goto done;

        // Slice height (i.e. number of slices per column): start with policy and pick the first one that height is divisible by.
        // For 4:2:0 make sure the slice height is divisible by 2 as well.
        if (options->dsc_min_slice_height_override == 0)
                slice_height = min(policy.min_slice_height, pic_height);
        else
                slice_height = min((int)(options->dsc_min_slice_height_override), pic_height);

        while (slice_height < pic_height && (pic_height % slice_height != 0 ||
                slice_height % options->slice_height_granularity != 0 ||
                (timing->pixel_encoding == PIXEL_ENCODING_YCBCR420 && slice_height % 2 != 0)))
                slice_height++;

        if (timing->pixel_encoding == PIXEL_ENCODING_YCBCR420) // For the case when pic_height < dsc_policy.min_sice_height
                is_dsc_possible = (slice_height % 2 == 0);

        if (!is_dsc_possible)
                goto done;

        if (slice_height > 0) {
                dsc_cfg->num_slices_v = pic_height / slice_height;
        } else {
                is_dsc_possible = false;
                goto done;
        }

        if (target_bandwidth_kbps > 0) {
                is_dsc_possible = decide_dsc_target_bpp_x16(
                                &policy,
                                options,
                                &dsc_common_caps,
                                target_bandwidth_kbps,
                                timing,
                                num_slices_h,
                                link_encoding,
                                &target_bpp);
                dsc_cfg->bits_per_pixel = target_bpp;
        }
        if (!is_dsc_possible)
                goto done;

        /* Fill out the rest of DSC settings */
        dsc_cfg->block_pred_enable = dsc_common_caps.is_block_pred_supported;
        dsc_cfg->linebuf_depth = dsc_common_caps.lb_bit_depth;
        dsc_cfg->version_minor = (dsc_common_caps.dsc_version & 0xf0) >> 4;
        dsc_cfg->is_frl = dsc_sink_caps->is_frl;
        if (dsc_cfg->is_frl)
                dsc_cfg->num_slices_h = num_slices_h;
        dsc_cfg->is_vic_all_bpp = dsc_sink_caps->is_vic_all_bpp;
        dsc_cfg->total_chunk_kbytes = dsc_sink_caps->total_chunk_kbytes;
        dsc_cfg->is_dp = dsc_sink_caps->is_dp;

done:
        if (!is_dsc_possible)
                memset(dsc_cfg, 0, sizeof(struct dc_dsc_config));

        return is_dsc_possible;
}

bool dc_dsc_compute_config(
                const struct display_stream_compressor *dsc,
                const struct dsc_dec_dpcd_caps *dsc_sink_caps,
                const struct dc_dsc_config_options *options,
                uint32_t target_bandwidth_kbps,
                const struct dc_crtc_timing *timing,
                const enum dc_link_encoding_format link_encoding,
                struct dc_dsc_config *dsc_cfg)
{
        bool is_dsc_possible = false;
        struct dsc_enc_caps dsc_enc_caps;
        unsigned int min_dsc_slice_count;
        get_dsc_enc_caps(dsc, &dsc_enc_caps, timing->pix_clk_100hz);

        min_dsc_slice_count = get_min_dsc_slice_count_for_odm(dsc, &dsc_enc_caps, timing);

        is_dsc_possible = setup_dsc_config(dsc_sink_caps,
                &dsc_enc_caps,
                target_bandwidth_kbps,
                timing,
                options,
                link_encoding,
                min_dsc_slice_count,
                dsc_cfg);
        return is_dsc_possible;
}

uint32_t dc_dsc_stream_bandwidth_in_kbps(const struct dc_crtc_timing *timing,
        uint32_t bpp_x16, uint32_t num_slices_h, bool is_dp)
{
        uint32_t overhead_in_kbps;
        struct fixed31_32 bpp;
        struct fixed31_32 actual_bandwidth_in_kbps;

        overhead_in_kbps = dc_dsc_stream_bandwidth_overhead_in_kbps(
                timing, num_slices_h, is_dp);
        bpp = dc_fixpt_from_fraction(bpp_x16, 16);
        actual_bandwidth_in_kbps = dc_fixpt_from_fraction(timing->pix_clk_100hz, 10);
        actual_bandwidth_in_kbps = dc_fixpt_mul(actual_bandwidth_in_kbps, bpp);
        actual_bandwidth_in_kbps = dc_fixpt_add_int(actual_bandwidth_in_kbps, overhead_in_kbps);
        return dc_fixpt_ceil(actual_bandwidth_in_kbps);
}

uint32_t dc_dsc_stream_bandwidth_overhead_in_kbps(
                const struct dc_crtc_timing *timing,
                const uint32_t num_slices_h,
                const bool is_dp)
{
        struct fixed31_32 max_dsc_overhead;
        struct fixed31_32 refresh_rate;

        if (dsc_policy_disable_dsc_stream_overhead || !is_dp)
                return 0;

        /* use target bpp that can take entire target bandwidth */
        refresh_rate = dc_fixpt_from_int(timing->pix_clk_100hz);
        refresh_rate = dc_fixpt_div_int(refresh_rate, timing->h_total);
        refresh_rate = dc_fixpt_div_int(refresh_rate, timing->v_total);
        refresh_rate = dc_fixpt_mul_int(refresh_rate, 100);

        max_dsc_overhead = dc_fixpt_from_int(num_slices_h);
        max_dsc_overhead = dc_fixpt_mul_int(max_dsc_overhead, timing->v_total);
        max_dsc_overhead = dc_fixpt_mul_int(max_dsc_overhead, 256);
        max_dsc_overhead = dc_fixpt_div_int(max_dsc_overhead, 1000);
        max_dsc_overhead = dc_fixpt_mul(max_dsc_overhead, refresh_rate);

        return dc_fixpt_ceil(max_dsc_overhead);
}

void dc_dsc_get_policy_for_timing(const struct dc_crtc_timing *timing,
                uint32_t max_target_bpp_limit_override_x16,
                struct dc_dsc_policy *policy,
                const enum dc_link_encoding_format link_encoding)
{
        uint32_t bpc = 0;

        policy->min_target_bpp = 0;
        policy->max_target_bpp = 0;

        /* DSC Policy: Use minimum number of slices that fits the pixel clock */
        policy->use_min_slices_h = true;

        /* DSC Policy: Use max available slices
         * (in our case 4 for or 8, depending on the mode)
         */
        policy->max_slices_h = 0;

        /* DSC Policy: Use slice height recommended
         * by VESA DSC Spreadsheet user guide
         */
        policy->min_slice_height = 108;

        /* DSC Policy: follow DP specs with an internal upper limit to 16 bpp
         * for better interoperability
         */
        switch (timing->display_color_depth) {
        case COLOR_DEPTH_888:
                bpc = 8;
                break;
        case COLOR_DEPTH_101010:
                bpc = 10;
                break;
        case COLOR_DEPTH_121212:
                bpc = 12;
                break;
        default:
                return;
        }
        switch (timing->pixel_encoding) {
        case PIXEL_ENCODING_RGB:
        case PIXEL_ENCODING_YCBCR444:
        case PIXEL_ENCODING_YCBCR422: /* assume no YCbCr422 native support */
                /* DP specs limits to 8 */
                policy->min_target_bpp = 8;
                /* DP specs limits to 3 x bpc */
                policy->max_target_bpp = 3 * bpc;
                policy->ycbcr422_simple = true;
                if (timing->pixel_encoding == PIXEL_ENCODING_YCBCR422 && link_encoding == DC_LINK_ENCODING_HDMI_FRL) {
                        /* HDMI FRL YCbCr422 native support */
                        policy->min_target_bpp = 7;
                        policy->max_target_bpp = 2 * bpc;
                        policy->ycbcr422_simple = false;
                }
                break;
        case PIXEL_ENCODING_YCBCR420:
                /* DP specs limits to 6 */
                policy->min_target_bpp = 6;
                /* DP specs limits to 1.5 x bpc assume bpc is an even number */
                policy->max_target_bpp = bpc * 3 / 2;
                break;
        default:
                return;
        }

        /* internal upper limit, default 16 bpp */
        if (policy->max_target_bpp > dsc_policy_max_target_bpp_limit)
                policy->max_target_bpp = dsc_policy_max_target_bpp_limit;

        /* apply override */
        if (max_target_bpp_limit_override_x16 && policy->max_target_bpp > max_target_bpp_limit_override_x16 / 16)
                policy->max_target_bpp = max_target_bpp_limit_override_x16 / 16;

        /* enable DSC when not needed, default false */
        policy->enable_dsc_when_not_needed = dsc_policy_enable_dsc_when_not_needed;
}

void dc_dsc_policy_set_max_target_bpp_limit(uint32_t limit)
{
        dsc_policy_max_target_bpp_limit = limit;
}

void dc_dsc_policy_set_enable_dsc_when_not_needed(bool enable)
{
        dsc_policy_enable_dsc_when_not_needed = enable;
}

void dc_dsc_policy_set_disable_dsc_stream_overhead(bool disable)
{
        dsc_policy_disable_dsc_stream_overhead = disable;
}

void dc_set_disable_128b_132b_stream_overhead(bool disable)
{
        disable_128b_132b_stream_overhead = disable;
}

void dc_dsc_get_default_config_option(const struct dc *dc, struct dc_dsc_config_options *options)
{
        options->dsc_min_slice_height_override = dc->debug.dsc_min_slice_height_override;
        options->dsc_force_odm_hslice_override = dc->debug.force_odm_combine;
        options->max_target_bpp_limit_override_x16 = 0;
        options->slice_height_granularity = 1;
        options->force_dsc_when_not_needed = false;
}