/*
 * Copyright 2012-15 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 <linux/slab.h>

#include "dm_services.h"

#include "resource.h"
#include "include/irq_service_interface.h"
#include "link_encoder.h"
#include "stream_encoder.h"
#include "opp.h"
#include "timing_generator.h"
#include "transform.h"
#include "dccg.h"
#include "dchubbub.h"
#include "dpp.h"
#include "core_types.h"
#include "set_mode_types.h"
#include "virtual/virtual_stream_encoder.h"
#include "dpcd_defs.h"

#include "dce80/dce80_resource.h"
#include "dce100/dce100_resource.h"
#include "dce110/dce110_resource.h"
#include "dce112/dce112_resource.h"
#if defined(CONFIG_DRM_AMD_DC_DCN1_0)
#include "dcn10/dcn10_resource.h"
#endif
#if defined(CONFIG_DRM_AMD_DC_DCN2_0)
#include "dcn20/dcn20_resource.h"
#endif
#include "dce120/dce120_resource.h"

#define DC_LOGGER_INIT(logger)

enum dce_version resource_parse_asic_id(struct hw_asic_id asic_id)
{
        enum dce_version dc_version = DCE_VERSION_UNKNOWN;
        switch (asic_id.chip_family) {

        case FAMILY_CI:
                dc_version = DCE_VERSION_8_0;
                break;
        case FAMILY_KV:
                if (ASIC_REV_IS_KALINDI(asic_id.hw_internal_rev) ||
                    ASIC_REV_IS_BHAVANI(asic_id.hw_internal_rev) ||
                    ASIC_REV_IS_GODAVARI(asic_id.hw_internal_rev))
                        dc_version = DCE_VERSION_8_3;
                else
                        dc_version = DCE_VERSION_8_1;
                break;
        case FAMILY_CZ:
                dc_version = DCE_VERSION_11_0;
                break;

        case FAMILY_VI:
                if (ASIC_REV_IS_TONGA_P(asic_id.hw_internal_rev) ||
                                ASIC_REV_IS_FIJI_P(asic_id.hw_internal_rev)) {
                        dc_version = DCE_VERSION_10_0;
                        break;
                }
                if (ASIC_REV_IS_POLARIS10_P(asic_id.hw_internal_rev) ||
                                ASIC_REV_IS_POLARIS11_M(asic_id.hw_internal_rev) ||
                                ASIC_REV_IS_POLARIS12_V(asic_id.hw_internal_rev)) {
                        dc_version = DCE_VERSION_11_2;
                }
                if (ASIC_REV_IS_VEGAM(asic_id.hw_internal_rev))
                        dc_version = DCE_VERSION_11_22;
                break;
        case FAMILY_AI:
                if (ASICREV_IS_VEGA20_P(asic_id.hw_internal_rev))
                        dc_version = DCE_VERSION_12_1;
                else
                        dc_version = DCE_VERSION_12_0;
                break;
#if defined(CONFIG_DRM_AMD_DC_DCN1_0)
        case FAMILY_RV:
                dc_version = DCN_VERSION_1_0;
                if (ASICREV_IS_RAVEN2(asic_id.hw_internal_rev))
                        dc_version = DCN_VERSION_1_01;
                break;
#endif

#if defined(CONFIG_DRM_AMD_DC_DCN2_0)
        case FAMILY_NV:
                dc_version = DCN_VERSION_2_0;
                break;
#endif
        default:
                dc_version = DCE_VERSION_UNKNOWN;
                break;
        }
        return dc_version;
}

struct resource_pool *dc_create_resource_pool(struct dc  *dc,
                                              const struct dc_init_data *init_data,
                                              enum dce_version dc_version)
{
        struct resource_pool *res_pool = NULL;

        switch (dc_version) {
        case DCE_VERSION_8_0:
                res_pool = dce80_create_resource_pool(
                                init_data->num_virtual_links, dc);
                break;
        case DCE_VERSION_8_1:
                res_pool = dce81_create_resource_pool(
                                init_data->num_virtual_links, dc);
                break;
        case DCE_VERSION_8_3:
                res_pool = dce83_create_resource_pool(
                                init_data->num_virtual_links, dc);
                break;
        case DCE_VERSION_10_0:
                res_pool = dce100_create_resource_pool(
                                init_data->num_virtual_links, dc);
                break;
        case DCE_VERSION_11_0:
                res_pool = dce110_create_resource_pool(
                                init_data->num_virtual_links, dc,
                                init_data->asic_id);
                break;
        case DCE_VERSION_11_2:
        case DCE_VERSION_11_22:
                res_pool = dce112_create_resource_pool(
                                init_data->num_virtual_links, dc);
                break;
        case DCE_VERSION_12_0:
        case DCE_VERSION_12_1:
                res_pool = dce120_create_resource_pool(
                                init_data->num_virtual_links, dc);
                break;

#if defined(CONFIG_DRM_AMD_DC_DCN1_0)
        case DCN_VERSION_1_0:
        case DCN_VERSION_1_01:
                res_pool = dcn10_create_resource_pool(init_data, dc);
                break;
#endif


#if defined(CONFIG_DRM_AMD_DC_DCN2_0)
        case DCN_VERSION_2_0:
                res_pool = dcn20_create_resource_pool(init_data, dc);
                break;
#endif

        default:
                break;
        }
        if (res_pool != NULL) {
                struct dc_firmware_info fw_info = { { 0 } };

                if (dc->ctx->dc_bios->funcs->get_firmware_info(dc->ctx->dc_bios,
                                &fw_info) == BP_RESULT_OK) {
                        res_pool->ref_clocks.xtalin_clock_inKhz =
                                fw_info.pll_info.crystal_frequency;
                        /* initialize with firmware data first, no all
                         * ASIC have DCCG SW component. FPGA or
                         * simulation need initialization of
                         * dccg_ref_clock_inKhz, dchub_ref_clock_inKhz
                         * with xtalin_clock_inKhz
                         */
                        res_pool->ref_clocks.dccg_ref_clock_inKhz =
                                res_pool->ref_clocks.xtalin_clock_inKhz;
                        res_pool->ref_clocks.dchub_ref_clock_inKhz =
                                res_pool->ref_clocks.xtalin_clock_inKhz;
                } else
                        ASSERT_CRITICAL(false);
        }

        return res_pool;
}

void dc_destroy_resource_pool(struct dc  *dc)
{
        if (dc) {
                if (dc->res_pool)
                        dc->res_pool->funcs->destroy(&dc->res_pool);

                kfree(dc->hwseq);
        }
}

static void update_num_audio(
        const struct resource_straps *straps,
        unsigned int *num_audio,
        struct audio_support *aud_support)
{
        aud_support->dp_audio = true;
        aud_support->hdmi_audio_native = false;
        aud_support->hdmi_audio_on_dongle = false;

        if (straps->hdmi_disable == 0) {
                if (straps->dc_pinstraps_audio & 0x2) {
                        aud_support->hdmi_audio_on_dongle = true;
                        aud_support->hdmi_audio_native = true;
                }
        }

        switch (straps->audio_stream_number) {
        case 0: /* multi streams supported */
                break;
        case 1: /* multi streams not supported */
                *num_audio = 1;
                break;
        default:
                DC_ERR("DC: unexpected audio fuse!\n");
        }
}

bool resource_construct(
        unsigned int num_virtual_links,
        struct dc  *dc,
        struct resource_pool *pool,
        const struct resource_create_funcs *create_funcs)
{
        struct dc_context *ctx = dc->ctx;
        const struct resource_caps *caps = pool->res_cap;
        int i;
        unsigned int num_audio = caps->num_audio;
        struct resource_straps straps = {0};

        if (create_funcs->read_dce_straps)
                create_funcs->read_dce_straps(dc->ctx, &straps);

        pool->audio_count = 0;
        if (create_funcs->create_audio) {
                /* find the total number of streams available via the
                 * AZALIA_F0_CODEC_PIN_CONTROL_RESPONSE_CONFIGURATION_DEFAULT
                 * registers (one for each pin) starting from pin 1
                 * up to the max number of audio pins.
                 * We stop on the first pin where
                 * PORT_CONNECTIVITY == 1 (as instructed by HW team).
                 */
                update_num_audio(&straps, &num_audio, &pool->audio_support);
                for (i = 0; i < caps->num_audio; i++) {
                        struct audio *aud = create_funcs->create_audio(ctx, i);

                        if (aud == NULL) {
                                DC_ERR("DC: failed to create audio!\n");
                                return false;
                        }

                        if (!aud->funcs->endpoint_valid(aud)) {
                                aud->funcs->destroy(&aud);
                                break;
                        }

                        pool->audios[i] = aud;
                        pool->audio_count++;
                }
        }

        pool->stream_enc_count = 0;
        if (create_funcs->create_stream_encoder) {
                for (i = 0; i < caps->num_stream_encoder; i++) {
                        pool->stream_enc[i] = create_funcs->create_stream_encoder(i, ctx);
                        if (pool->stream_enc[i] == NULL)
                                DC_ERR("DC: failed to create stream_encoder!\n");
                        pool->stream_enc_count++;
                }
        }

        dc->caps.dynamic_audio = false;
        if (pool->audio_count < pool->stream_enc_count) {
                dc->caps.dynamic_audio = true;
        }
        for (i = 0; i < num_virtual_links; i++) {
                pool->stream_enc[pool->stream_enc_count] =
                        virtual_stream_encoder_create(
                                        ctx, ctx->dc_bios);
                if (pool->stream_enc[pool->stream_enc_count] == NULL) {
                        DC_ERR("DC: failed to create stream_encoder!\n");
                        return false;
                }
                pool->stream_enc_count++;
        }

        dc->hwseq = create_funcs->create_hwseq(ctx);

        return true;
}
static int find_matching_clock_source(
                const struct resource_pool *pool,
                struct clock_source *clock_source)
{

        int i;

        for (i = 0; i < pool->clk_src_count; i++) {
                if (pool->clock_sources[i] == clock_source)
                        return i;
        }
        return -1;
}

void resource_unreference_clock_source(
                struct resource_context *res_ctx,
                const struct resource_pool *pool,
                struct clock_source *clock_source)
{
        int i = find_matching_clock_source(pool, clock_source);

        if (i > -1)
                res_ctx->clock_source_ref_count[i]--;

        if (pool->dp_clock_source == clock_source)
                res_ctx->dp_clock_source_ref_count--;
}

void resource_reference_clock_source(
                struct resource_context *res_ctx,
                const struct resource_pool *pool,
                struct clock_source *clock_source)
{
        int i = find_matching_clock_source(pool, clock_source);

        if (i > -1)
                res_ctx->clock_source_ref_count[i]++;

        if (pool->dp_clock_source == clock_source)
                res_ctx->dp_clock_source_ref_count++;
}

int resource_get_clock_source_reference(
                struct resource_context *res_ctx,
                const struct resource_pool *pool,
                struct clock_source *clock_source)
{
        int i = find_matching_clock_source(pool, clock_source);

        if (i > -1)
                return res_ctx->clock_source_ref_count[i];

        if (pool->dp_clock_source == clock_source)
                return res_ctx->dp_clock_source_ref_count;

        return -1;
}

bool resource_are_streams_timing_synchronizable(
        struct dc_stream_state *stream1,
        struct dc_stream_state *stream2)
{
        if (stream1->timing.h_total != stream2->timing.h_total)
                return false;

        if (stream1->timing.v_total != stream2->timing.v_total)
                return false;

        if (stream1->timing.h_addressable
                                != stream2->timing.h_addressable)
                return false;

        if (stream1->timing.v_addressable
                                != stream2->timing.v_addressable)
                return false;

        if (stream1->timing.pix_clk_100hz
                                != stream2->timing.pix_clk_100hz)
                return false;

        if (stream1->clamping.c_depth != stream2->clamping.c_depth)
                return false;

        if (stream1->phy_pix_clk != stream2->phy_pix_clk
                        && (!dc_is_dp_signal(stream1->signal)
                        || !dc_is_dp_signal(stream2->signal)))
                return false;

        if (stream1->view_format != stream2->view_format)
                return false;

        return true;
}
static bool is_dp_and_hdmi_sharable(
                struct dc_stream_state *stream1,
                struct dc_stream_state *stream2)
{
        if (stream1->ctx->dc->caps.disable_dp_clk_share)
                return false;

        if (stream1->clamping.c_depth != COLOR_DEPTH_888 ||
                stream2->clamping.c_depth != COLOR_DEPTH_888)
                return false;

        return true;

}

static bool is_sharable_clk_src(
        const struct pipe_ctx *pipe_with_clk_src,
        const struct pipe_ctx *pipe)
{
        if (pipe_with_clk_src->clock_source == NULL)
                return false;

        if (pipe_with_clk_src->stream->signal == SIGNAL_TYPE_VIRTUAL)
                return false;

        if (dc_is_dp_signal(pipe_with_clk_src->stream->signal) ||
                (dc_is_dp_signal(pipe->stream->signal) &&
                !is_dp_and_hdmi_sharable(pipe_with_clk_src->stream,
                                     pipe->stream)))
                return false;

        if (dc_is_hdmi_signal(pipe_with_clk_src->stream->signal)
                        && dc_is_dual_link_signal(pipe->stream->signal))
                return false;

        if (dc_is_hdmi_signal(pipe->stream->signal)
                        && dc_is_dual_link_signal(pipe_with_clk_src->stream->signal))
                return false;

        if (!resource_are_streams_timing_synchronizable(
                        pipe_with_clk_src->stream, pipe->stream))
                return false;

        return true;
}

struct clock_source *resource_find_used_clk_src_for_sharing(
                                        struct resource_context *res_ctx,
                                        struct pipe_ctx *pipe_ctx)
{
        int i;

        for (i = 0; i < MAX_PIPES; i++) {
                if (is_sharable_clk_src(&res_ctx->pipe_ctx[i], pipe_ctx))
                        return res_ctx->pipe_ctx[i].clock_source;
        }

        return NULL;
}

static enum pixel_format convert_pixel_format_to_dalsurface(
                enum surface_pixel_format surface_pixel_format)
{
        enum pixel_format dal_pixel_format = PIXEL_FORMAT_UNKNOWN;

        switch (surface_pixel_format) {
        case SURFACE_PIXEL_FORMAT_GRPH_PALETA_256_COLORS:
                dal_pixel_format = PIXEL_FORMAT_INDEX8;
                break;
        case SURFACE_PIXEL_FORMAT_GRPH_ARGB1555:
                dal_pixel_format = PIXEL_FORMAT_RGB565;
                break;
        case SURFACE_PIXEL_FORMAT_GRPH_RGB565:
                dal_pixel_format = PIXEL_FORMAT_RGB565;
                break;
        case SURFACE_PIXEL_FORMAT_GRPH_ARGB8888:
                dal_pixel_format = PIXEL_FORMAT_ARGB8888;
                break;
        case SURFACE_PIXEL_FORMAT_GRPH_ABGR8888:
                dal_pixel_format = PIXEL_FORMAT_ARGB8888;
                break;
        case SURFACE_PIXEL_FORMAT_GRPH_ARGB2101010:
                dal_pixel_format = PIXEL_FORMAT_ARGB2101010;
                break;
        case SURFACE_PIXEL_FORMAT_GRPH_ABGR2101010:
                dal_pixel_format = PIXEL_FORMAT_ARGB2101010;
                break;
        case SURFACE_PIXEL_FORMAT_GRPH_ABGR2101010_XR_BIAS:
                dal_pixel_format = PIXEL_FORMAT_ARGB2101010_XRBIAS;
                break;
        case SURFACE_PIXEL_FORMAT_GRPH_ABGR16161616F:
        case SURFACE_PIXEL_FORMAT_GRPH_ARGB16161616F:
                dal_pixel_format = PIXEL_FORMAT_FP16;
                break;
        case SURFACE_PIXEL_FORMAT_VIDEO_420_YCbCr:
        case SURFACE_PIXEL_FORMAT_VIDEO_420_YCrCb:
                dal_pixel_format = PIXEL_FORMAT_420BPP8;
                break;
        case SURFACE_PIXEL_FORMAT_VIDEO_420_10bpc_YCbCr:
        case SURFACE_PIXEL_FORMAT_VIDEO_420_10bpc_YCrCb:
                dal_pixel_format = PIXEL_FORMAT_420BPP10;
                break;
        case SURFACE_PIXEL_FORMAT_GRPH_ARGB16161616:
        default:
                dal_pixel_format = PIXEL_FORMAT_UNKNOWN;
                break;
        }
        return dal_pixel_format;
}

static inline void get_vp_scan_direction(
        enum dc_rotation_angle rotation,
        bool horizontal_mirror,
        bool *orthogonal_rotation,
        bool *flip_vert_scan_dir,
        bool *flip_horz_scan_dir)
{
        *orthogonal_rotation = false;
        *flip_vert_scan_dir = false;
        *flip_horz_scan_dir = false;
        if (rotation == ROTATION_ANGLE_180) {
                *flip_vert_scan_dir = true;
                *flip_horz_scan_dir = true;
        } else if (rotation == ROTATION_ANGLE_90) {
                *orthogonal_rotation = true;
                *flip_horz_scan_dir = true;
        } else if (rotation == ROTATION_ANGLE_270) {
                *orthogonal_rotation = true;
                *flip_vert_scan_dir = true;
        }

        if (horizontal_mirror)
                *flip_horz_scan_dir = !*flip_horz_scan_dir;
}

static void calculate_viewport(struct pipe_ctx *pipe_ctx)
{
        const struct dc_plane_state *plane_state = pipe_ctx->plane_state;
        const struct dc_stream_state *stream = pipe_ctx->stream;
        struct scaler_data *data = &pipe_ctx->plane_res.scl_data;
        struct rect surf_src = plane_state->src_rect;
        struct rect clip, dest;
        int vpc_div = (data->format == PIXEL_FORMAT_420BPP8
                        || data->format == PIXEL_FORMAT_420BPP10) ? 2 : 1;
        bool pri_split = pipe_ctx->bottom_pipe &&
                        pipe_ctx->bottom_pipe->plane_state == pipe_ctx->plane_state;
        bool sec_split = pipe_ctx->top_pipe &&
                        pipe_ctx->top_pipe->plane_state == pipe_ctx->plane_state;
        bool orthogonal_rotation, flip_y_start, flip_x_start;

        if (stream->view_format == VIEW_3D_FORMAT_SIDE_BY_SIDE ||
                stream->view_format == VIEW_3D_FORMAT_TOP_AND_BOTTOM) {
                pri_split = false;
                sec_split = false;
        }

        /* The actual clip is an intersection between stream
         * source and surface clip
         */
        dest = plane_state->dst_rect;
        clip.x = stream->src.x > plane_state->clip_rect.x ?
                        stream->src.x : plane_state->clip_rect.x;

        clip.width = stream->src.x + stream->src.width <
                        plane_state->clip_rect.x + plane_state->clip_rect.width ?
                        stream->src.x + stream->src.width - clip.x :
                        plane_state->clip_rect.x + plane_state->clip_rect.width - clip.x ;

        clip.y = stream->src.y > plane_state->clip_rect.y ?
                        stream->src.y : plane_state->clip_rect.y;

        clip.height = stream->src.y + stream->src.height <
                        plane_state->clip_rect.y + plane_state->clip_rect.height ?
                        stream->src.y + stream->src.height - clip.y :
                        plane_state->clip_rect.y + plane_state->clip_rect.height - clip.y ;

        /*
         * Need to calculate how scan origin is shifted in vp space
         * to correctly rotate clip and dst
         */
        get_vp_scan_direction(
                        plane_state->rotation,
                        plane_state->horizontal_mirror,
                        &orthogonal_rotation,
                        &flip_y_start,
                        &flip_x_start);

        if (orthogonal_rotation) {
                swap(clip.x, clip.y);
                swap(clip.width, clip.height);
                swap(dest.x, dest.y);
                swap(dest.width, dest.height);
        }
        if (flip_x_start) {
                clip.x = dest.x + dest.width - clip.x - clip.width;
                dest.x = 0;
        }
        if (flip_y_start) {
                clip.y = dest.y + dest.height - clip.y - clip.height;
                dest.y = 0;
        }

        /* offset = surf_src.ofs + (clip.ofs - surface->dst_rect.ofs) * scl_ratio
         * num_pixels = clip.num_pix * scl_ratio
         */
        data->viewport.x = surf_src.x + (clip.x - dest.x) * surf_src.width / dest.width;
        data->viewport.width = clip.width * surf_src.width / dest.width;

        data->viewport.y = surf_src.y + (clip.y - dest.y) * surf_src.height / dest.height;
        data->viewport.height = clip.height * surf_src.height / dest.height;

        /* Handle split */
        if (pri_split || sec_split) {
                if (orthogonal_rotation) {
                        if (flip_y_start != pri_split)
                                data->viewport.height /= 2;
                        else {
                                data->viewport.y +=  data->viewport.height / 2;
                                /* Ceil offset pipe */
                                data->viewport.height = (data->viewport.height + 1) / 2;
                        }
                } else {
                        if (flip_x_start != pri_split)
                                data->viewport.width /= 2;
                        else {
                                data->viewport.x +=  data->viewport.width / 2;
                                /* Ceil offset pipe */
                                data->viewport.width = (data->viewport.width + 1) / 2;
                        }
                }
        }

        /* Round down, compensate in init */
        data->viewport_c.x = data->viewport.x / vpc_div;
        data->viewport_c.y = data->viewport.y / vpc_div;
        data->inits.h_c = (data->viewport.x % vpc_div) != 0 ? dc_fixpt_half : dc_fixpt_zero;
        data->inits.v_c = (data->viewport.y % vpc_div) != 0 ? dc_fixpt_half : dc_fixpt_zero;

        /* Round up, assume original video size always even dimensions */
        data->viewport_c.width = (data->viewport.width + vpc_div - 1) / vpc_div;
        data->viewport_c.height = (data->viewport.height + vpc_div - 1) / vpc_div;
}

static void calculate_recout(struct pipe_ctx *pipe_ctx)
{
        const struct dc_plane_state *plane_state = pipe_ctx->plane_state;
        const struct dc_stream_state *stream = pipe_ctx->stream;
        struct rect surf_clip = plane_state->clip_rect;
        bool pri_split = pipe_ctx->bottom_pipe &&
                        pipe_ctx->bottom_pipe->plane_state == pipe_ctx->plane_state;
        bool sec_split = pipe_ctx->top_pipe &&
                        pipe_ctx->top_pipe->plane_state == pipe_ctx->plane_state;
        bool top_bottom_split = stream->view_format == VIEW_3D_FORMAT_TOP_AND_BOTTOM;

        pipe_ctx->plane_res.scl_data.recout.x = stream->dst.x;
        if (stream->src.x < surf_clip.x)
                pipe_ctx->plane_res.scl_data.recout.x += (surf_clip.x
                        - stream->src.x) * stream->dst.width
                                                / stream->src.width;

        pipe_ctx->plane_res.scl_data.recout.width = surf_clip.width *
                        stream->dst.width / stream->src.width;
        if (pipe_ctx->plane_res.scl_data.recout.width + pipe_ctx->plane_res.scl_data.recout.x >
                        stream->dst.x + stream->dst.width)
                pipe_ctx->plane_res.scl_data.recout.width =
                        stream->dst.x + stream->dst.width
                                                - pipe_ctx->plane_res.scl_data.recout.x;

        pipe_ctx->plane_res.scl_data.recout.y = stream->dst.y;
        if (stream->src.y < surf_clip.y)
                pipe_ctx->plane_res.scl_data.recout.y += (surf_clip.y
                        - stream->src.y) * stream->dst.height
                                                / stream->src.height;

        pipe_ctx->plane_res.scl_data.recout.height = surf_clip.height *
                        stream->dst.height / stream->src.height;
        if (pipe_ctx->plane_res.scl_data.recout.height + pipe_ctx->plane_res.scl_data.recout.y >
                        stream->dst.y + stream->dst.height)
                pipe_ctx->plane_res.scl_data.recout.height =
                        stream->dst.y + stream->dst.height
                                                - pipe_ctx->plane_res.scl_data.recout.y;

        /* Handle h & v split, handle rotation using viewport */
        if (sec_split && top_bottom_split) {
                pipe_ctx->plane_res.scl_data.recout.y +=
                                pipe_ctx->plane_res.scl_data.recout.height / 2;
                /* Floor primary pipe, ceil 2ndary pipe */
                pipe_ctx->plane_res.scl_data.recout.height =
                                (pipe_ctx->plane_res.scl_data.recout.height + 1) / 2;
        } else if (pri_split && top_bottom_split)
                pipe_ctx->plane_res.scl_data.recout.height /= 2;
        else if (sec_split) {
                pipe_ctx->plane_res.scl_data.recout.x +=
                                pipe_ctx->plane_res.scl_data.recout.width / 2;
                /* Ceil offset pipe */
                pipe_ctx->plane_res.scl_data.recout.width =
                                (pipe_ctx->plane_res.scl_data.recout.width + 1) / 2;
        } else if (pri_split)
                pipe_ctx->plane_res.scl_data.recout.width /= 2;
}

static void calculate_scaling_ratios(struct pipe_ctx *pipe_ctx)
{
        const struct dc_plane_state *plane_state = pipe_ctx->plane_state;
        const struct dc_stream_state *stream = pipe_ctx->stream;
        struct rect surf_src = plane_state->src_rect;
        const int in_w = stream->src.width;
        const int in_h = stream->src.height;
        const int out_w = stream->dst.width;
        const int out_h = stream->dst.height;

        /*Swap surf_src height and width since scaling ratios are in recout rotation*/
        if (pipe_ctx->plane_state->rotation == ROTATION_ANGLE_90 ||
                        pipe_ctx->plane_state->rotation == ROTATION_ANGLE_270)
                swap(surf_src.height, surf_src.width);

        pipe_ctx->plane_res.scl_data.ratios.horz = dc_fixpt_from_fraction(
                                        surf_src.width,
                                        plane_state->dst_rect.width);
        pipe_ctx->plane_res.scl_data.ratios.vert = dc_fixpt_from_fraction(
                                        surf_src.height,
                                        plane_state->dst_rect.height);

        if (stream->view_format == VIEW_3D_FORMAT_SIDE_BY_SIDE)
                pipe_ctx->plane_res.scl_data.ratios.horz.value *= 2;
        else if (stream->view_format == VIEW_3D_FORMAT_TOP_AND_BOTTOM)
                pipe_ctx->plane_res.scl_data.ratios.vert.value *= 2;

        pipe_ctx->plane_res.scl_data.ratios.vert.value = div64_s64(
                pipe_ctx->plane_res.scl_data.ratios.vert.value * in_h, out_h);
        pipe_ctx->plane_res.scl_data.ratios.horz.value = div64_s64(
                pipe_ctx->plane_res.scl_data.ratios.horz.value * in_w, out_w);

        pipe_ctx->plane_res.scl_data.ratios.horz_c = pipe_ctx->plane_res.scl_data.ratios.horz;
        pipe_ctx->plane_res.scl_data.ratios.vert_c = pipe_ctx->plane_res.scl_data.ratios.vert;

        if (pipe_ctx->plane_res.scl_data.format == PIXEL_FORMAT_420BPP8
                        || pipe_ctx->plane_res.scl_data.format == PIXEL_FORMAT_420BPP10) {
                pipe_ctx->plane_res.scl_data.ratios.horz_c.value /= 2;
                pipe_ctx->plane_res.scl_data.ratios.vert_c.value /= 2;
        }
        pipe_ctx->plane_res.scl_data.ratios.horz = dc_fixpt_truncate(
                        pipe_ctx->plane_res.scl_data.ratios.horz, 19);
        pipe_ctx->plane_res.scl_data.ratios.vert = dc_fixpt_truncate(
                        pipe_ctx->plane_res.scl_data.ratios.vert, 19);
        pipe_ctx->plane_res.scl_data.ratios.horz_c = dc_fixpt_truncate(
                        pipe_ctx->plane_res.scl_data.ratios.horz_c, 19);
        pipe_ctx->plane_res.scl_data.ratios.vert_c = dc_fixpt_truncate(
                        pipe_ctx->plane_res.scl_data.ratios.vert_c, 19);
}

static inline void adjust_vp_and_init_for_seamless_clip(
                bool flip_scan_dir,
                int recout_skip,
                int src_size,
                int taps,
                struct fixed31_32 ratio,
                struct fixed31_32 *init,
                int *vp_offset,
                int *vp_size)
{
        if (!flip_scan_dir) {
                /* Adjust for viewport end clip-off */
                if ((*vp_offset + *vp_size) < src_size) {
                        int vp_clip = src_size - *vp_size - *vp_offset;
                        int int_part = dc_fixpt_floor(dc_fixpt_sub(*init, ratio));

                        int_part = int_part > 0 ? int_part : 0;
                        *vp_size += int_part < vp_clip ? int_part : vp_clip;
                }

                /* Adjust for non-0 viewport offset */
                if (*vp_offset) {
                        int int_part;

                        *init = dc_fixpt_add(*init, dc_fixpt_mul_int(ratio, recout_skip));
                        int_part = dc_fixpt_floor(*init) - *vp_offset;
                        if (int_part < taps) {
                                int int_adj = *vp_offset >= (taps - int_part) ?
                                                        (taps - int_part) : *vp_offset;
                                *vp_offset -= int_adj;
                                *vp_size += int_adj;
                                int_part += int_adj;
                        } else if (int_part > taps) {
                                *vp_offset += int_part - taps;
                                *vp_size -= int_part - taps;
                                int_part = taps;
                        }
                        init->value &= 0xffffffff;
                        *init = dc_fixpt_add_int(*init, int_part);
                }
        } else {
                /* Adjust for non-0 viewport offset */
                if (*vp_offset) {
                        int int_part = dc_fixpt_floor(dc_fixpt_sub(*init, ratio));

                        int_part = int_part > 0 ? int_part : 0;
                        *vp_size += int_part < *vp_offset ? int_part : *vp_offset;
                        *vp_offset -= int_part < *vp_offset ? int_part : *vp_offset;
                }

                /* Adjust for viewport end clip-off */
                if ((*vp_offset + *vp_size) < src_size) {
                        int int_part;
                        int end_offset = src_size - *vp_offset - *vp_size;

                        /*
                         * this is init if vp had no offset, keep in mind this is from the
                         * right side of vp due to scan direction
                         */
                        *init = dc_fixpt_add(*init, dc_fixpt_mul_int(ratio, recout_skip));
                        /*
                         * this is the difference between first pixel of viewport available to read
                         * and init position, takning into account scan direction
                         */
                        int_part = dc_fixpt_floor(*init) - end_offset;
                        if (int_part < taps) {
                                int int_adj = end_offset >= (taps - int_part) ?
                                                        (taps - int_part) : end_offset;
                                *vp_size += int_adj;
                                int_part += int_adj;
                        } else if (int_part > taps) {
                                *vp_size += int_part - taps;
                                int_part = taps;
                        }
                        init->value &= 0xffffffff;
                        *init = dc_fixpt_add_int(*init, int_part);
                }
        }
}

static void calculate_inits_and_adj_vp(struct pipe_ctx *pipe_ctx)
{
        const struct dc_plane_state *plane_state = pipe_ctx->plane_state;
        const struct dc_stream_state *stream = pipe_ctx->stream;
        struct scaler_data *data = &pipe_ctx->plane_res.scl_data;
        struct rect src = pipe_ctx->plane_state->src_rect;
        int recout_skip_h, recout_skip_v, surf_size_h, surf_size_v;
        int vpc_div = (data->format == PIXEL_FORMAT_420BPP8
                        || data->format == PIXEL_FORMAT_420BPP10) ? 2 : 1;
        bool orthogonal_rotation, flip_vert_scan_dir, flip_horz_scan_dir;

        /*
         * Need to calculate the scan direction for viewport to make adjustments
         */
        get_vp_scan_direction(
                        plane_state->rotation,
                        plane_state->horizontal_mirror,
                        &orthogonal_rotation,
                        &flip_vert_scan_dir,
                        &flip_horz_scan_dir);

        /* Calculate src rect rotation adjusted to recout space */
        surf_size_h = src.x + src.width;
        surf_size_v = src.y + src.height;
        if (flip_horz_scan_dir)
                src.x = 0;
        if (flip_vert_scan_dir)
                src.y = 0;
        if (orthogonal_rotation) {
                swap(src.x, src.y);
                swap(src.width, src.height);
        }

        /* Recout matching initial vp offset = recout_offset - (stream dst offset +
         *                      ((surf dst offset - stream src offset) * 1/ stream scaling ratio)
         *                      - (surf surf_src offset * 1/ full scl ratio))
         */
        recout_skip_h = data->recout.x - (stream->dst.x + (plane_state->dst_rect.x - stream->src.x)
                                        * stream->dst.width / stream->src.width -
                                        src.x * plane_state->dst_rect.width / src.width
                                        * stream->dst.width / stream->src.width);
        recout_skip_v = data->recout.y - (stream->dst.y + (plane_state->dst_rect.y - stream->src.y)
                                        * stream->dst.height / stream->src.height -
                                        src.y * plane_state->dst_rect.height / src.height
                                        * stream->dst.height / stream->src.height);
        if (orthogonal_rotation)
                swap(recout_skip_h, recout_skip_v);
        /*
         * Init calculated according to formula:
         *      init = (scaling_ratio + number_of_taps + 1) / 2
         *      init_bot = init + scaling_ratio
         *      init_c = init + truncated_vp_c_offset(from calculate viewport)
         */
        data->inits.h = dc_fixpt_truncate(dc_fixpt_div_int(
                        dc_fixpt_add_int(data->ratios.horz, data->taps.h_taps + 1), 2), 19);

        data->inits.h_c = dc_fixpt_truncate(dc_fixpt_add(data->inits.h_c, dc_fixpt_div_int(
                        dc_fixpt_add_int(data->ratios.horz_c, data->taps.h_taps_c + 1), 2)), 19);

        data->inits.v = dc_fixpt_truncate(dc_fixpt_div_int(
                        dc_fixpt_add_int(data->ratios.vert, data->taps.v_taps + 1), 2), 19);

        data->inits.v_c = dc_fixpt_truncate(dc_fixpt_add(data->inits.v_c, dc_fixpt_div_int(
                        dc_fixpt_add_int(data->ratios.vert_c, data->taps.v_taps_c + 1), 2)), 19);

        /*
         * Taps, inits and scaling ratios are in recout space need to rotate
         * to viewport rotation before adjustment
         */
        adjust_vp_and_init_for_seamless_clip(
                        flip_horz_scan_dir,
                        recout_skip_h,
                        surf_size_h,
                        orthogonal_rotation ? data->taps.v_taps : data->taps.h_taps,
                        orthogonal_rotation ? data->ratios.vert : data->ratios.horz,
                        orthogonal_rotation ? &data->inits.v : &data->inits.h,
                        &data->viewport.x,
                        &data->viewport.width);
        adjust_vp_and_init_for_seamless_clip(
                        flip_horz_scan_dir,
                        recout_skip_h,
                        surf_size_h / vpc_div,
                        orthogonal_rotation ? data->taps.v_taps_c : data->taps.h_taps_c,
                        orthogonal_rotation ? data->ratios.vert_c : data->ratios.horz_c,
                        orthogonal_rotation ? &data->inits.v_c : &data->inits.h_c,
                        &data->viewport_c.x,
                        &data->viewport_c.width);
        adjust_vp_and_init_for_seamless_clip(
                        flip_vert_scan_dir,
                        recout_skip_v,
                        surf_size_v,
                        orthogonal_rotation ? data->taps.h_taps : data->taps.v_taps,
                        orthogonal_rotation ? data->ratios.horz : data->ratios.vert,
                        orthogonal_rotation ? &data->inits.h : &data->inits.v,
                        &data->viewport.y,
                        &data->viewport.height);
        adjust_vp_and_init_for_seamless_clip(
                        flip_vert_scan_dir,
                        recout_skip_v,
                        surf_size_v / vpc_div,
                        orthogonal_rotation ? data->taps.h_taps_c : data->taps.v_taps_c,
                        orthogonal_rotation ? data->ratios.horz_c : data->ratios.vert_c,
                        orthogonal_rotation ? &data->inits.h_c : &data->inits.v_c,
                        &data->viewport_c.y,
                        &data->viewport_c.height);

        /* Interlaced inits based on final vert inits */
        data->inits.v_bot = dc_fixpt_add(data->inits.v, data->ratios.vert);
        data->inits.v_c_bot = dc_fixpt_add(data->inits.v_c, data->ratios.vert_c);

}

bool resource_build_scaling_params(struct pipe_ctx *pipe_ctx)
{
        const struct dc_plane_state *plane_state = pipe_ctx->plane_state;
        struct dc_crtc_timing *timing = &pipe_ctx->stream->timing;
        bool res = false;
        DC_LOGGER_INIT(pipe_ctx->stream->ctx->logger);
        /* Important: scaling ratio calculation requires pixel format,
         * lb depth calculation requires recout and taps require scaling ratios.
         * Inits require viewport, taps, ratios and recout of split pipe
         */
        pipe_ctx->plane_res.scl_data.format = convert_pixel_format_to_dalsurface(
                        pipe_ctx->plane_state->format);

        calculate_scaling_ratios(pipe_ctx);

        calculate_viewport(pipe_ctx);

        if (pipe_ctx->plane_res.scl_data.viewport.height < 16 || pipe_ctx->plane_res.scl_data.viewport.width < 16)
                return false;

        calculate_recout(pipe_ctx);

        /**
         * Setting line buffer pixel depth to 24bpp yields banding
         * on certain displays, such as the Sharp 4k
         */
        pipe_ctx->plane_res.scl_data.lb_params.depth = LB_PIXEL_DEPTH_30BPP;

        pipe_ctx->plane_res.scl_data.recout.x += timing->h_border_left;
        pipe_ctx->plane_res.scl_data.recout.y += timing->v_border_top;

        pipe_ctx->plane_res.scl_data.h_active = timing->h_addressable + timing->h_border_left + timing->h_border_right;
        pipe_ctx->plane_res.scl_data.v_active = timing->v_addressable + timing->v_border_top + timing->v_border_bottom;

        /* Taps calculations */
        if (pipe_ctx->plane_res.xfm != NULL)
                res = pipe_ctx->plane_res.xfm->funcs->transform_get_optimal_number_of_taps(
                                pipe_ctx->plane_res.xfm, &pipe_ctx->plane_res.scl_data, &plane_state->scaling_quality);

        if (pipe_ctx->plane_res.dpp != NULL)
                res = pipe_ctx->plane_res.dpp->funcs->dpp_get_optimal_number_of_taps(
                                pipe_ctx->plane_res.dpp, &pipe_ctx->plane_res.scl_data, &plane_state->scaling_quality);
        if (!res) {
                /* Try 24 bpp linebuffer */
                pipe_ctx->plane_res.scl_data.lb_params.depth = LB_PIXEL_DEPTH_24BPP;

                if (pipe_ctx->plane_res.xfm != NULL)
                        res = pipe_ctx->plane_res.xfm->funcs->transform_get_optimal_number_of_taps(
                                        pipe_ctx->plane_res.xfm,
                                        &pipe_ctx->plane_res.scl_data,
                                        &plane_state->scaling_quality);

                if (pipe_ctx->plane_res.dpp != NULL)
                        res = pipe_ctx->plane_res.dpp->funcs->dpp_get_optimal_number_of_taps(
                                        pipe_ctx->plane_res.dpp,
                                        &pipe_ctx->plane_res.scl_data,
                                        &plane_state->scaling_quality);

        }

        if (res)
                /* May need to re-check lb size after this in some obscure scenario */
                calculate_inits_and_adj_vp(pipe_ctx);

        DC_LOG_SCALER(
                                "%s: Viewport:\nheight:%d width:%d x:%d "
                                "y:%d\n dst_rect:\nheight:%d width:%d x:%d "
                                "y:%d\n",
                                __func__,
                                pipe_ctx->plane_res.scl_data.viewport.height,
                                pipe_ctx->plane_res.scl_data.viewport.width,
                                pipe_ctx->plane_res.scl_data.viewport.x,
                                pipe_ctx->plane_res.scl_data.viewport.y,
                                plane_state->dst_rect.height,
                                plane_state->dst_rect.width,
                                plane_state->dst_rect.x,
                                plane_state->dst_rect.y);

        return res;
}


enum dc_status resource_build_scaling_params_for_context(
        const struct dc  *dc,
        struct dc_state *context)
{
        int i;

        for (i = 0; i < MAX_PIPES; i++) {
                if (context->res_ctx.pipe_ctx[i].plane_state != NULL &&
                                context->res_ctx.pipe_ctx[i].stream != NULL)
                        if (!resource_build_scaling_params(&context->res_ctx.pipe_ctx[i]))
                                return DC_FAIL_SCALING;
        }

        return DC_OK;
}

struct pipe_ctx *find_idle_secondary_pipe(
                struct resource_context *res_ctx,
                const struct resource_pool *pool,
                const struct pipe_ctx *primary_pipe)
{
        int i;
        struct pipe_ctx *secondary_pipe = NULL;

        /*
         * We add a preferred pipe mapping to avoid the chance that
         * MPCCs already in use will need to be reassigned to other trees.
         * For example, if we went with the strict, assign backwards logic:
         *
         * (State 1)
         * Display A on, no surface, top pipe = 0
         * Display B on, no surface, top pipe = 1
         *
         * (State 2)
         * Display A on, no surface, top pipe = 0
         * Display B on, surface enable, top pipe = 1, bottom pipe = 5
         *
         * (State 3)
         * Display A on, surface enable, top pipe = 0, bottom pipe = 5
         * Display B on, surface enable, top pipe = 1, bottom pipe = 4
         *
         * The state 2->3 transition requires remapping MPCC 5 from display B
         * to display A.
         *
         * However, with the preferred pipe logic, state 2 would look like:
         *
         * (State 2)
         * Display A on, no surface, top pipe = 0
         * Display B on, surface enable, top pipe = 1, bottom pipe = 4
         *
         * This would then cause 2->3 to not require remapping any MPCCs.
         */
        if (primary_pipe) {
                int preferred_pipe_idx = (pool->pipe_count - 1) - primary_pipe->pipe_idx;
                if (res_ctx->pipe_ctx[preferred_pipe_idx].stream == NULL) {
                        secondary_pipe = &res_ctx->pipe_ctx[preferred_pipe_idx];
                        secondary_pipe->pipe_idx = preferred_pipe_idx;
                }
        }

        /*
         * search backwards for the second pipe to keep pipe
         * assignment more consistent
         */
        if (!secondary_pipe)
                for (i = pool->pipe_count - 1; i >= 0; i--) {
                        if (res_ctx->pipe_ctx[i].stream == NULL) {
                                secondary_pipe = &res_ctx->pipe_ctx[i];
                                secondary_pipe->pipe_idx = i;
                                break;
                        }
                }

        return secondary_pipe;
}

struct pipe_ctx *resource_get_head_pipe_for_stream(
                struct resource_context *res_ctx,
                struct dc_stream_state *stream)
{
        int i;
        for (i = 0; i < MAX_PIPES; i++) {
                if (res_ctx->pipe_ctx[i].stream == stream &&
                                !res_ctx->pipe_ctx[i].top_pipe) {
                        return &res_ctx->pipe_ctx[i];
                        break;
                }
        }
        return NULL;
}

static struct pipe_ctx *resource_get_tail_pipe_for_stream(
                struct resource_context *res_ctx,
                struct dc_stream_state *stream)
{
        struct pipe_ctx *head_pipe, *tail_pipe;
        head_pipe = resource_get_head_pipe_for_stream(res_ctx, stream);

        if (!head_pipe)
                return NULL;

        tail_pipe = head_pipe->bottom_pipe;

        while (tail_pipe) {
                head_pipe = tail_pipe;
                tail_pipe = tail_pipe->bottom_pipe;
        }

        return head_pipe;
}

/*
 * A free_pipe for a stream is defined here as a pipe
 * that has no surface attached yet
 */
static struct pipe_ctx *acquire_free_pipe_for_stream(
                struct dc_state *context,
                const struct resource_pool *pool,
                struct dc_stream_state *stream)
{
        int i;
        struct resource_context *res_ctx = &context->res_ctx;

        struct pipe_ctx *head_pipe = NULL;

        /* Find head pipe, which has the back end set up*/

        head_pipe = resource_get_head_pipe_for_stream(res_ctx, stream);

        if (!head_pipe) {
                ASSERT(0);
                return NULL;
        }

        if (!head_pipe->plane_state)
                return head_pipe;

        /* Re-use pipe already acquired for this stream if available*/
        for (i = pool->pipe_count - 1; i >= 0; i--) {
                if (res_ctx->pipe_ctx[i].stream == stream &&
                                !res_ctx->pipe_ctx[i].plane_state) {
                        return &res_ctx->pipe_ctx[i];
                }
        }

        /*
         * At this point we have no re-useable pipe for this stream and we need
         * to acquire an idle one to satisfy the request
         */

        if (!pool->funcs->acquire_idle_pipe_for_layer)
                return NULL;

        return pool->funcs->acquire_idle_pipe_for_layer(context, pool, stream);

}

#if defined(CONFIG_DRM_AMD_DC_DCN1_0)
static int acquire_first_split_pipe(
                struct resource_context *res_ctx,
                const struct resource_pool *pool,
                struct dc_stream_state *stream)
{
        int i;

        for (i = 0; i < pool->pipe_count; i++) {
                struct pipe_ctx *split_pipe = &res_ctx->pipe_ctx[i];

                if (split_pipe->top_pipe && !dc_res_is_odm_head_pipe(split_pipe) &&
                                split_pipe->top_pipe->plane_state == split_pipe->plane_state) {
                        split_pipe->top_pipe->bottom_pipe = split_pipe->bottom_pipe;
                        if (split_pipe->bottom_pipe)
                                split_pipe->bottom_pipe->top_pipe = split_pipe->top_pipe;

                        if (split_pipe->top_pipe->plane_state)
                                resource_build_scaling_params(split_pipe->top_pipe);

                        memset(split_pipe, 0, sizeof(*split_pipe));
                        split_pipe->stream_res.tg = pool->timing_generators[i];
                        split_pipe->plane_res.hubp = pool->hubps[i];
                        split_pipe->plane_res.ipp = pool->ipps[i];
                        split_pipe->plane_res.dpp = pool->dpps[i];
                        split_pipe->stream_res.opp = pool->opps[i];
                        split_pipe->plane_res.mpcc_inst = pool->dpps[i]->inst;
                        split_pipe->pipe_idx = i;

                        split_pipe->stream = stream;
                        return i;
                }
        }
        return -1;
}
#endif

bool dc_add_plane_to_context(
                const struct dc *dc,
                struct dc_stream_state *stream,
                struct dc_plane_state *plane_state,
                struct dc_state *context)
{
        int i;
        struct resource_pool *pool = dc->res_pool;
        struct pipe_ctx *head_pipe, *tail_pipe, *free_pipe;
        struct dc_stream_status *stream_status = NULL;

        for (i = 0; i < context->stream_count; i++)
                if (context->streams[i] == stream) {
                        stream_status = &context->stream_status[i];
                        break;
                }
        if (stream_status == NULL) {
                dm_error("Existing stream not found; failed to attach surface!\n");
                return false;
        }


        if (stream_status->plane_count == MAX_SURFACE_NUM) {
                dm_error("Surface: can not attach plane_state %p! Maximum is: %d\n",
                                plane_state, MAX_SURFACE_NUM);
                return false;
        }

        head_pipe = resource_get_head_pipe_for_stream(&context->res_ctx, stream);

        if (!head_pipe) {
                dm_error("Head pipe not found for stream_state %p !\n", stream);
                return false;
        }

        tail_pipe = resource_get_tail_pipe_for_stream(&context->res_ctx, stream);
        ASSERT(tail_pipe);

        free_pipe = acquire_free_pipe_for_stream(context, pool, stream);

#if defined(CONFIG_DRM_AMD_DC_DCN1_0)
        if (!free_pipe) {
                int pipe_idx = acquire_first_split_pipe(&context->res_ctx, pool, stream);
                if (pipe_idx >= 0)
                        free_pipe = &context->res_ctx.pipe_ctx[pipe_idx];
        }
#endif
        if (!free_pipe)
                return false;

        /* retain new surfaces */
        dc_plane_state_retain(plane_state);
        free_pipe->plane_state = plane_state;

        if (head_pipe != free_pipe) {
                free_pipe->stream_res.tg = tail_pipe->stream_res.tg;
                free_pipe->stream_res.abm = tail_pipe->stream_res.abm;
                free_pipe->stream_res.opp = tail_pipe->stream_res.opp;
                free_pipe->stream_res.stream_enc = tail_pipe->stream_res.stream_enc;
                free_pipe->stream_res.audio = tail_pipe->stream_res.audio;
                free_pipe->clock_source = tail_pipe->clock_source;
                free_pipe->top_pipe = tail_pipe;
                tail_pipe->bottom_pipe = free_pipe;
        } else if (free_pipe->bottom_pipe && free_pipe->bottom_pipe->plane_state == NULL) {
                ASSERT(free_pipe->bottom_pipe->stream_res.opp != free_pipe->stream_res.opp);
                free_pipe->bottom_pipe->plane_state = plane_state;
        }

        /* assign new surfaces*/
        stream_status->plane_states[stream_status->plane_count] = plane_state;

        stream_status->plane_count++;

        return true;
}

struct pipe_ctx *dc_res_get_odm_bottom_pipe(struct pipe_ctx *pipe_ctx)
{
        struct pipe_ctx *bottom_pipe = pipe_ctx->bottom_pipe;

        /* ODM should only be updated once per otg */
        if (pipe_ctx->top_pipe)
                return NULL;

        while (bottom_pipe) {
                if (bottom_pipe->stream_res.opp != pipe_ctx->stream_res.opp)
                        break;
                bottom_pipe = bottom_pipe->bottom_pipe;
        }

        return bottom_pipe;
}

bool dc_res_is_odm_head_pipe(struct pipe_ctx *pipe_ctx)
{
        struct pipe_ctx *top_pipe = pipe_ctx->top_pipe;

        if (!top_pipe)
                return false;
        if (top_pipe && top_pipe->stream_res.opp == pipe_ctx->stream_res.opp)
                return false;

        return true;
}

bool dc_remove_plane_from_context(
                const struct dc *dc,
                struct dc_stream_state *stream,
                struct dc_plane_state *plane_state,
                struct dc_state *context)
{
        int i;
        struct dc_stream_status *stream_status = NULL;
        struct resource_pool *pool = dc->res_pool;

        for (i = 0; i < context->stream_count; i++)
                if (context->streams[i] == stream) {
                        stream_status = &context->stream_status[i];
                        break;
                }

        if (stream_status == NULL) {
                dm_error("Existing stream not found; failed to remove plane.\n");
                return false;
        }

        /* release pipe for plane*/
        for (i = pool->pipe_count - 1; i >= 0; i--) {
                struct pipe_ctx *pipe_ctx = &context->res_ctx.pipe_ctx[i];

                if (pipe_ctx->plane_state == plane_state) {
                        if (dc_res_is_odm_head_pipe(pipe_ctx)) {
                                pipe_ctx->plane_state = NULL;
                                pipe_ctx->bottom_pipe = NULL;
                                continue;
                        }

                        if (pipe_ctx->top_pipe)
                                pipe_ctx->top_pipe->bottom_pipe = pipe_ctx->bottom_pipe;

                        /* Second condition is to avoid setting NULL to top pipe
                         * of tail pipe making it look like head pipe in subsequent
                         * deletes
                         */
                        if (pipe_ctx->bottom_pipe && pipe_ctx->top_pipe)
                                pipe_ctx->bottom_pipe->top_pipe = pipe_ctx->top_pipe;

                        /*
                         * For head pipe detach surfaces from pipe for tail
                         * pipe just zero it out
                         */
                        if (!pipe_ctx->top_pipe) {
                                pipe_ctx->plane_state = NULL;
                                if (!dc_res_get_odm_bottom_pipe(pipe_ctx))
                                        pipe_ctx->bottom_pipe = NULL;
                        } else {
                                memset(pipe_ctx, 0, sizeof(*pipe_ctx));
                        }
                }
        }


        for (i = 0; i < stream_status->plane_count; i++) {
                if (stream_status->plane_states[i] == plane_state) {

                        dc_plane_state_release(stream_status->plane_states[i]);
                        break;
                }
        }

        if (i == stream_status->plane_count) {
                dm_error("Existing plane_state not found; failed to detach it!\n");
                return false;
        }

        stream_status->plane_count--;

        /* Start at the plane we've just released, and move all the planes one index forward to "trim" the array */
        for (; i < stream_status->plane_count; i++)
                stream_status->plane_states[i] = stream_status->plane_states[i + 1];

        stream_status->plane_states[stream_status->plane_count] = NULL;

        return true;
}

bool dc_rem_all_planes_for_stream(
                const struct dc *dc,
                struct dc_stream_state *stream,
                struct dc_state *context)
{
        int i, old_plane_count;
        struct dc_stream_status *stream_status = NULL;
        struct dc_plane_state *del_planes[MAX_SURFACE_NUM] = { 0 };

        for (i = 0; i < context->stream_count; i++)
                        if (context->streams[i] == stream) {
                                stream_status = &context->stream_status[i];
                                break;
                        }

        if (stream_status == NULL) {
                dm_error("Existing stream %p not found!\n", stream);
                return false;
        }

        old_plane_count = stream_status->plane_count;

        for (i = 0; i < old_plane_count; i++)
                del_planes[i] = stream_status->plane_states[i];

        for (i = 0; i < old_plane_count; i++)
                if (!dc_remove_plane_from_context(dc, stream, del_planes[i], context))
                        return false;

        return true;
}

static bool add_all_planes_for_stream(
                const struct dc *dc,
                struct dc_stream_state *stream,
                const struct dc_validation_set set[],
                int set_count,
                struct dc_state *context)
{
        int i, j;

        for (i = 0; i < set_count; i++)
                if (set[i].stream == stream)
                        break;

        if (i == set_count) {
                dm_error("Stream %p not found in set!\n", stream);
                return false;
        }

        for (j = 0; j < set[i].plane_count; j++)
                if (!dc_add_plane_to_context(dc, stream, set[i].plane_states[j], context))
                        return false;

        return true;
}

bool dc_add_all_planes_for_stream(
                const struct dc *dc,
                struct dc_stream_state *stream,
                struct dc_plane_state * const *plane_states,
                int plane_count,
                struct dc_state *context)
{
        struct dc_validation_set set;
        int i;

        set.stream = stream;
        set.plane_count = plane_count;

        for (i = 0; i < plane_count; i++)
                set.plane_states[i] = plane_states[i];

        return add_all_planes_for_stream(dc, stream, &set, 1, context);
}


static bool is_hdr_static_meta_changed(struct dc_stream_state *cur_stream,
        struct dc_stream_state *new_stream)
{
        if (cur_stream == NULL)
                return true;

        if (memcmp(&cur_stream->hdr_static_metadata,
                        &new_stream->hdr_static_metadata,
                        sizeof(struct dc_info_packet)) != 0)
                return true;

        return false;
}

static bool is_vsc_info_packet_changed(struct dc_stream_state *cur_stream,
                struct dc_stream_state *new_stream)
{
        if (cur_stream == NULL)
                return true;

        if (memcmp(&cur_stream->vsc_infopacket,
                        &new_stream->vsc_infopacket,
                        sizeof(struct dc_info_packet)) != 0)
                return true;

        return false;
}

static bool is_timing_changed(struct dc_stream_state *cur_stream,
                struct dc_stream_state *new_stream)
{
        if (cur_stream == NULL)
                return true;

        /* If sink pointer changed, it means this is a hotplug, we should do
         * full hw setting.
         */
        if (cur_stream->sink != new_stream->sink)
                return true;

        /* If output color space is changed, need to reprogram info frames */
        if (cur_stream->output_color_space != new_stream->output_color_space)
                return true;

        return memcmp(
                &cur_stream->timing,
                &new_stream->timing,
                sizeof(struct dc_crtc_timing)) != 0;
}

static bool are_stream_backends_same(
        struct dc_stream_state *stream_a, struct dc_stream_state *stream_b)
{
        if (stream_a == stream_b)
                return true;

        if (stream_a == NULL || stream_b == NULL)
                return false;

        if (is_timing_changed(stream_a, stream_b))
                return false;

        if (is_hdr_static_meta_changed(stream_a, stream_b))
                return false;

        if (stream_a->dpms_off != stream_b->dpms_off)
                return false;

        if (is_vsc_info_packet_changed(stream_a, stream_b))
                return false;

        return true;
}

/**
 * dc_is_stream_unchanged() - Compare two stream states for equivalence.
 *
 * Checks if there a difference between the two states
 * that would require a mode change.
 *
 * Does not compare cursor position or attributes.
 */
bool dc_is_stream_unchanged(
        struct dc_stream_state *old_stream, struct dc_stream_state *stream)
{

        if (!are_stream_backends_same(old_stream, stream))
                return false;

        return true;
}

/**
 * dc_is_stream_scaling_unchanged() - Compare scaling rectangles of two streams.
 */
bool dc_is_stream_scaling_unchanged(
        struct dc_stream_state *old_stream, struct dc_stream_state *stream)
{
        if (old_stream == stream)
                return true;

        if (old_stream == NULL || stream == NULL)
                return false;

        if (memcmp(&old_stream->src,
                        &stream->src,
                        sizeof(struct rect)) != 0)
                return false;

        if (memcmp(&old_stream->dst,
                        &stream->dst,
                        sizeof(struct rect)) != 0)
                return false;

        return true;
}

static void update_stream_engine_usage(
                struct resource_context *res_ctx,
                const struct resource_pool *pool,
                struct stream_encoder *stream_enc,
                bool acquired)
{
        int i;

        for (i = 0; i < pool->stream_enc_count; i++) {
                if (pool->stream_enc[i] == stream_enc)
                        res_ctx->is_stream_enc_acquired[i] = acquired;
        }
}

/* TODO: release audio object */
void update_audio_usage(
                struct resource_context *res_ctx,
                const struct resource_pool *pool,
                struct audio *audio,
                bool acquired)
{
        int i;
        for (i = 0; i < pool->audio_count; i++) {
                if (pool->audios[i] == audio)
                        res_ctx->is_audio_acquired[i] = acquired;
        }
}

static int acquire_first_free_pipe(
                struct resource_context *res_ctx,
                const struct resource_pool *pool,
                struct dc_stream_state *stream)
{
        int i;

        for (i = 0; i < pool->pipe_count; i++) {
                if (!res_ctx->pipe_ctx[i].stream) {
                        struct pipe_ctx *pipe_ctx = &res_ctx->pipe_ctx[i];

                        pipe_ctx->stream_res.tg = pool->timing_generators[i];
                        pipe_ctx->plane_res.mi = pool->mis[i];
                        pipe_ctx->plane_res.hubp = pool->hubps[i];
                        pipe_ctx->plane_res.ipp = pool->ipps[i];
                        pipe_ctx->plane_res.xfm = pool->transforms[i];
                        pipe_ctx->plane_res.dpp = pool->dpps[i];
                        pipe_ctx->stream_res.opp = pool->opps[i];
                        if (pool->dpps[i])
                                pipe_ctx->plane_res.mpcc_inst = pool->dpps[i]->inst;
                        pipe_ctx->pipe_idx = i;


                        pipe_ctx->stream = stream;
                        return i;
                }
        }
        return -1;
}

static struct audio *find_first_free_audio(
                struct resource_context *res_ctx,
                const struct resource_pool *pool,
                enum engine_id id)
{
        int i;
        for (i = 0; i < pool->audio_count; i++) {
                if ((res_ctx->is_audio_acquired[i] == false) && (res_ctx->is_stream_enc_acquired[i] == true)) {
                        /*we have enough audio endpoint, find the matching inst*/
                        if (id != i)
                                continue;

                        return pool->audios[i];
                }
        }

    /* use engine id to find free audio */
        if ((id < pool->audio_count) && (res_ctx->is_audio_acquired[id] == false)) {
                return pool->audios[id];
        }

        /*not found the matching one, first come first serve*/
        for (i = 0; i < pool->audio_count; i++) {
                if (res_ctx->is_audio_acquired[i] == false) {
                        return pool->audios[i];
                }
        }
        return 0;
}

bool resource_is_stream_unchanged(
        struct dc_state *old_context, struct dc_stream_state *stream)
{
        int i;

        for (i = 0; i < old_context->stream_count; i++) {
                struct dc_stream_state *old_stream = old_context->streams[i];

                if (are_stream_backends_same(old_stream, stream))
                                return true;
        }

        return false;
}

/**
 * dc_add_stream_to_ctx() - Add a new dc_stream_state to a dc_state.
 */
enum dc_status dc_add_stream_to_ctx(
                struct dc *dc,
                struct dc_state *new_ctx,
                struct dc_stream_state *stream)
{
        enum dc_status res;
        DC_LOGGER_INIT(dc->ctx->logger);

        if (new_ctx->stream_count >= dc->res_pool->timing_generator_count) {
                DC_LOG_WARNING("Max streams reached, can't add stream %p !\n", stream);
                return DC_ERROR_UNEXPECTED;
        }

        new_ctx->streams[new_ctx->stream_count] = stream;
        dc_stream_retain(stream);
        new_ctx->stream_count++;

        res = dc->res_pool->funcs->add_stream_to_ctx(dc, new_ctx, stream);
        if (res != DC_OK)
                DC_LOG_WARNING("Adding stream %p to context failed with err %d!\n", stream, res);

        return res;
}

/**
 * dc_remove_stream_from_ctx() - Remove a stream from a dc_state.
 */
enum dc_status dc_remove_stream_from_ctx(
                        struct dc *dc,
                        struct dc_state *new_ctx,
                        struct dc_stream_state *stream)
{
        int i;
        struct dc_context *dc_ctx = dc->ctx;
        struct pipe_ctx *del_pipe = NULL;

        /* Release primary pipe */
        for (i = 0; i < MAX_PIPES; i++) {
                if (new_ctx->res_ctx.pipe_ctx[i].stream == stream &&
                                !new_ctx->res_ctx.pipe_ctx[i].top_pipe) {
                        struct pipe_ctx *odm_pipe =
                                        dc_res_get_odm_bottom_pipe(&new_ctx->res_ctx.pipe_ctx[i]);

                        del_pipe = &new_ctx->res_ctx.pipe_ctx[i];

                        ASSERT(del_pipe->stream_res.stream_enc);
                        update_stream_engine_usage(
                                        &new_ctx->res_ctx,
                                                dc->res_pool,
                                        del_pipe->stream_res.stream_enc,
                                        false);

                        if (del_pipe->stream_res.audio)
                                update_audio_usage(
                                        &new_ctx->res_ctx,
                                        dc->res_pool,
                                        del_pipe->stream_res.audio,
                                        false);

                        resource_unreference_clock_source(&new_ctx->res_ctx,
                                                          dc->res_pool,
                                                          del_pipe->clock_source);

                        if (dc->res_pool->funcs->remove_stream_from_ctx)
                                dc->res_pool->funcs->remove_stream_from_ctx(dc, new_ctx, stream);

                        memset(del_pipe, 0, sizeof(*del_pipe));
                        if (odm_pipe)
                                memset(odm_pipe, 0, sizeof(*odm_pipe));

                        break;
                }
        }

        if (!del_pipe) {
                DC_ERROR("Pipe not found for stream %p !\n", stream);
                return DC_ERROR_UNEXPECTED;
        }

        for (i = 0; i < new_ctx->stream_count; i++)
                if (new_ctx->streams[i] == stream)
                        break;

        if (new_ctx->streams[i] != stream) {
                DC_ERROR("Context doesn't have stream %p !\n", stream);
                return DC_ERROR_UNEXPECTED;
        }

        dc_stream_release(new_ctx->streams[i]);
        new_ctx->stream_count--;

        /* Trim back arrays */
        for (; i < new_ctx->stream_count; i++) {
                new_ctx->streams[i] = new_ctx->streams[i + 1];
                new_ctx->stream_status[i] = new_ctx->stream_status[i + 1];
        }

        new_ctx->streams[new_ctx->stream_count] = NULL;
        memset(
                        &new_ctx->stream_status[new_ctx->stream_count],
                        0,
                        sizeof(new_ctx->stream_status[0]));

        return DC_OK;
}

static struct dc_stream_state *find_pll_sharable_stream(
                struct dc_stream_state *stream_needs_pll,
                struct dc_state *context)
{
        int i;

        for (i = 0; i < context->stream_count; i++) {
                struct dc_stream_state *stream_has_pll = context->streams[i];

                /* We are looking for non dp, non virtual stream */
                if (resource_are_streams_timing_synchronizable(
                        stream_needs_pll, stream_has_pll)
                        && !dc_is_dp_signal(stream_has_pll->signal)
                        && stream_has_pll->link->connector_signal
                        != SIGNAL_TYPE_VIRTUAL)
                        return stream_has_pll;

        }

        return NULL;
}

static int get_norm_pix_clk(const struct dc_crtc_timing *timing)
{
        uint32_t pix_clk = timing->pix_clk_100hz;
        uint32_t normalized_pix_clk = pix_clk;

        if (timing->pixel_encoding == PIXEL_ENCODING_YCBCR420)
                pix_clk /= 2;
        if (timing->pixel_encoding != PIXEL_ENCODING_YCBCR422) {
                switch (timing->display_color_depth) {
                case COLOR_DEPTH_666:
                case COLOR_DEPTH_888:
                        normalized_pix_clk = pix_clk;
                        break;
                case COLOR_DEPTH_101010:
                        normalized_pix_clk = (pix_clk * 30) / 24;
                        break;
                case COLOR_DEPTH_121212:
                        normalized_pix_clk = (pix_clk * 36) / 24;
                break;
                case COLOR_DEPTH_161616:
                        normalized_pix_clk = (pix_clk * 48) / 24;
                break;
                default:
                        ASSERT(0);
                break;
                }
        }
        return normalized_pix_clk;
}

static void calculate_phy_pix_clks(struct dc_stream_state *stream)
{
        /* update actual pixel clock on all streams */
        if (dc_is_hdmi_signal(stream->signal))
                stream->phy_pix_clk = get_norm_pix_clk(
                        &stream->timing) / 10;
        else
                stream->phy_pix_clk =
                        stream->timing.pix_clk_100hz / 10;

        if (stream->timing.timing_3d_format == TIMING_3D_FORMAT_HW_FRAME_PACKING)
                stream->phy_pix_clk *= 2;
}

static int acquire_resource_from_hw_enabled_state(
                struct resource_context *res_ctx,
                const struct resource_pool *pool,
                struct dc_stream_state *stream)
{
        struct dc_link *link = stream->link;
        unsigned int inst;

        /* Check for enabled DIG to identify enabled display */
        if (!link->link_enc->funcs->is_dig_enabled(link->link_enc))
                return -1;

        /* Check for which front end is used by this encoder.
         * Note the inst is 1 indexed, where 0 is undefined.
         * Note that DIG_FE can source from different OTG but our
         * current implementation always map 1-to-1, so this code makes
         * the same assumption and doesn't check OTG source.
         */
        inst = link->link_enc->funcs->get_dig_frontend(link->link_enc) - 1;

        /* Instance should be within the range of the pool */
        if (inst >= pool->pipe_count)
                return -1;

        if (!res_ctx->pipe_ctx[inst].stream) {
                struct pipe_ctx *pipe_ctx = &res_ctx->pipe_ctx[inst];

                pipe_ctx->stream_res.tg = pool->timing_generators[inst];
                pipe_ctx->plane_res.mi = pool->mis[inst];
                pipe_ctx->plane_res.hubp = pool->hubps[inst];
                pipe_ctx->plane_res.ipp = pool->ipps[inst];
                pipe_ctx->plane_res.xfm = pool->transforms[inst];
                pipe_ctx->plane_res.dpp = pool->dpps[inst];
                pipe_ctx->stream_res.opp = pool->opps[inst];
                if (pool->dpps[inst])
                        pipe_ctx->plane_res.mpcc_inst = pool->dpps[inst]->inst;
                pipe_ctx->pipe_idx = inst;

                pipe_ctx->stream = stream;
                return inst;
        }

        return -1;
}

enum dc_status resource_map_pool_resources(
                const struct dc  *dc,
                struct dc_state *context,
                struct dc_stream_state *stream)
{
        const struct resource_pool *pool = dc->res_pool;
        int i;
        struct dc_context *dc_ctx = dc->ctx;
        struct pipe_ctx *pipe_ctx = NULL;
        int pipe_idx = -1;
        struct dc_bios *dcb = dc->ctx->dc_bios;

        /* TODO Check if this is needed */
        /*if (!resource_is_stream_unchanged(old_context, stream)) {
                        if (stream != NULL && old_context->streams[i] != NULL) {
                                stream->bit_depth_params =
                                                old_context->streams[i]->bit_depth_params;
                                stream->clamping = old_context->streams[i]->clamping;
                                continue;
                        }
                }
        */

        calculate_phy_pix_clks(stream);

        /* TODO: Check Linux */
        if (dc->config.allow_seamless_boot_optimization &&
                        !dcb->funcs->is_accelerated_mode(dcb)) {
                if (dc_validate_seamless_boot_timing(dc, stream->sink, &stream->timing))
                        stream->apply_seamless_boot_optimization = true;
        }

        if (stream->apply_seamless_boot_optimization)
                pipe_idx = acquire_resource_from_hw_enabled_state(
                                &context->res_ctx,
                                pool,
                                stream);

        if (pipe_idx < 0)
                /* acquire new resources */
                pipe_idx = acquire_first_free_pipe(&context->res_ctx, pool, stream);

#ifdef CONFIG_DRM_AMD_DC_DCN1_0
        if (pipe_idx < 0)
                pipe_idx = acquire_first_split_pipe(&context->res_ctx, pool, stream);
#endif

        if (pipe_idx < 0 || context->res_ctx.pipe_ctx[pipe_idx].stream_res.tg == NULL)
                return DC_NO_CONTROLLER_RESOURCE;

        pipe_ctx = &context->res_ctx.pipe_ctx[pipe_idx];

        pipe_ctx->stream_res.stream_enc =
                dc->res_pool->funcs->find_first_free_match_stream_enc_for_link(
                        &context->res_ctx, pool, stream);

        if (!pipe_ctx->stream_res.stream_enc)
                return DC_NO_STREAM_ENC_RESOURCE;

        update_stream_engine_usage(
                &context->res_ctx, pool,
                pipe_ctx->stream_res.stream_enc,
                true);

        /* TODO: Add check if ASIC support and EDID audio */
        if (!stream->converter_disable_audio &&
            dc_is_audio_capable_signal(pipe_ctx->stream->signal) &&
            stream->audio_info.mode_count && stream->audio_info.flags.all) {
                pipe_ctx->stream_res.audio = find_first_free_audio(
                &context->res_ctx, pool, pipe_ctx->stream_res.stream_enc->id);

                /*
                 * Audio assigned in order first come first get.
                 * There are asics which has number of audio
                 * resources less then number of pipes
                 */
                if (pipe_ctx->stream_res.audio)
                        update_audio_usage(&context->res_ctx, pool,
                                           pipe_ctx->stream_res.audio, true);

        }

        /* Add ABM to the resource if on EDP */
        if (pipe_ctx->stream && dc_is_embedded_signal(pipe_ctx->stream->signal))
                pipe_ctx->stream_res.abm = pool->abm;

        for (i = 0; i < context->stream_count; i++)
                if (context->streams[i] == stream) {
                        context->stream_status[i].primary_otg_inst = pipe_ctx->stream_res.tg->inst;
                        context->stream_status[i].stream_enc_inst = pipe_ctx->stream_res.stream_enc->id;
                        context->stream_status[i].audio_inst =
                                pipe_ctx->stream_res.audio ? pipe_ctx->stream_res.audio->inst : -1;

                        return DC_OK;
                }

        DC_ERROR("Stream %p not found in new ctx!\n", stream);
        return DC_ERROR_UNEXPECTED;
}

/**
 * dc_resource_state_copy_construct_current() - Creates a new dc_state from existing state
 * Is a shallow copy.  Increments refcounts on existing streams and planes.
 * @dc: copy out of dc->current_state
 * @dst_ctx: copy into this
 */
void dc_resource_state_copy_construct_current(
                const struct dc *dc,
                struct dc_state *dst_ctx)
{
        dc_resource_state_copy_construct(dc->current_state, dst_ctx);
}


void dc_resource_state_construct(
                const struct dc *dc,
                struct dc_state *dst_ctx)
{
        dst_ctx->clk_mgr = dc->clk_mgr;
}

/**
 * dc_validate_global_state() - Determine if HW can support a given state
 * Checks HW resource availability and bandwidth requirement.
 * @dc: dc struct for this driver
 * @new_ctx: state to be validated
 * @fast_validate: set to true if only yes/no to support matters
 *
 * Return: DC_OK if the result can be programmed.  Otherwise, an error code.
 */
enum dc_status dc_validate_global_state(
                struct dc *dc,
                struct dc_state *new_ctx,
                bool fast_validate)
{
        enum dc_status result = DC_ERROR_UNEXPECTED;
        int i, j;

        if (!new_ctx)
                return DC_ERROR_UNEXPECTED;

        if (dc->res_pool->funcs->validate_global) {
                result = dc->res_pool->funcs->validate_global(dc, new_ctx);
                if (result != DC_OK)
                        return result;
        }

        for (i = 0; i < new_ctx->stream_count; i++) {
                struct dc_stream_state *stream = new_ctx->streams[i];

                for (j = 0; j < dc->res_pool->pipe_count; j++) {
                        struct pipe_ctx *pipe_ctx = &new_ctx->res_ctx.pipe_ctx[j];

                        if (pipe_ctx->stream != stream)
                                continue;

                        if (dc->res_pool->funcs->get_default_swizzle_mode &&
                                        pipe_ctx->plane_state &&
                                        pipe_ctx->plane_state->tiling_info.gfx9.swizzle == DC_SW_UNKNOWN) {
                                result = dc->res_pool->funcs->get_default_swizzle_mode(pipe_ctx->plane_state);
                                if (result != DC_OK)
                                        return result;
                        }

                        /* Switch to dp clock source only if there is
                         * no non dp stream that shares the same timing
                         * with the dp stream.
                         */
                        if (dc_is_dp_signal(pipe_ctx->stream->signal) &&
                                !find_pll_sharable_stream(stream, new_ctx)) {

                                resource_unreference_clock_source(
                                                &new_ctx->res_ctx,
                                                dc->res_pool,
                                                pipe_ctx->clock_source);

                                pipe_ctx->clock_source = dc->res_pool->dp_clock_source;
                                resource_reference_clock_source(
                                                &new_ctx->res_ctx,
                                                dc->res_pool,
                                                 pipe_ctx->clock_source);
                        }
                }
        }

        result = resource_build_scaling_params_for_context(dc, new_ctx);

        if (result == DC_OK)
                if (!dc->res_pool->funcs->validate_bandwidth(dc, new_ctx, fast_validate))
                        result = DC_FAIL_BANDWIDTH_VALIDATE;

        return result;
}

static void patch_gamut_packet_checksum(
                struct dc_info_packet *gamut_packet)
{
        /* For gamut we recalc checksum */
        if (gamut_packet->valid) {
                uint8_t chk_sum = 0;
                uint8_t *ptr;
                uint8_t i;

                /*start of the Gamut data. */
                ptr = &gamut_packet->sb[3];

                for (i = 0; i <= gamut_packet->sb[1]; i++)
                        chk_sum += ptr[i];

                gamut_packet->sb[2] = (uint8_t) (0x100 - chk_sum);
        }
}

static void set_avi_info_frame(
                struct dc_info_packet *info_packet,
                struct pipe_ctx *pipe_ctx)
{
        struct dc_stream_state *stream = pipe_ctx->stream;
        enum dc_color_space color_space = COLOR_SPACE_UNKNOWN;
        uint32_t pixel_encoding = 0;
        enum scanning_type scan_type = SCANNING_TYPE_NODATA;
        enum dc_aspect_ratio aspect = ASPECT_RATIO_NO_DATA;
        bool itc = false;
        uint8_t itc_value = 0;
        uint8_t cn0_cn1 = 0;
        unsigned int cn0_cn1_value = 0;
        uint8_t *check_sum = NULL;
        uint8_t byte_index = 0;
        union hdmi_info_packet hdmi_info;
        union display_content_support support = {0};
        unsigned int vic = pipe_ctx->stream->timing.vic;
        enum dc_timing_3d_format format;

        memset(&hdmi_info, 0, sizeof(union hdmi_info_packet));

        color_space = pipe_ctx->stream->output_color_space;
        if (color_space == COLOR_SPACE_UNKNOWN)
                color_space = (stream->timing.pixel_encoding == PIXEL_ENCODING_RGB) ?
                        COLOR_SPACE_SRGB:COLOR_SPACE_YCBCR709;

        /* Initialize header */
        hdmi_info.bits.header.info_frame_type = HDMI_INFOFRAME_TYPE_AVI;
        /* InfoFrameVersion_3 is defined by CEA861F (Section 6.4), but shall
        * not be used in HDMI 2.0 (Section 10.1) */
        hdmi_info.bits.header.version = 2;
        hdmi_info.bits.header.length = HDMI_AVI_INFOFRAME_SIZE;

        /*
         * IDO-defined (Y2,Y1,Y0 = 1,1,1) shall not be used by devices built
         * according to HDMI 2.0 spec (Section 10.1)
         */

        switch (stream->timing.pixel_encoding) {
        case PIXEL_ENCODING_YCBCR422:
                pixel_encoding = 1;
                break;

        case PIXEL_ENCODING_YCBCR444:
                pixel_encoding = 2;
                break;
        case PIXEL_ENCODING_YCBCR420:
                pixel_encoding = 3;
                break;

        case PIXEL_ENCODING_RGB:
        default:
                pixel_encoding = 0;
        }

        /* Y0_Y1_Y2 : The pixel encoding */
        /* H14b AVI InfoFrame has extension on Y-field from 2 bits to 3 bits */
        hdmi_info.bits.Y0_Y1_Y2 = pixel_encoding;

        /* A0 = 1 Active Format Information valid */
        hdmi_info.bits.A0 = ACTIVE_FORMAT_VALID;

        /* B0, B1 = 3; Bar info data is valid */
        hdmi_info.bits.B0_B1 = BAR_INFO_BOTH_VALID;

        hdmi_info.bits.SC0_SC1 = PICTURE_SCALING_UNIFORM;

        /* S0, S1 : Underscan / Overscan */
        /* TODO: un-hardcode scan type */
        scan_type = SCANNING_TYPE_UNDERSCAN;
        hdmi_info.bits.S0_S1 = scan_type;

        /* C0, C1 : Colorimetry */
        if (color_space == COLOR_SPACE_YCBCR709 ||
                        color_space == COLOR_SPACE_YCBCR709_LIMITED)
                hdmi_info.bits.C0_C1 = COLORIMETRY_ITU709;
        else if (color_space == COLOR_SPACE_YCBCR601 ||
                        color_space == COLOR_SPACE_YCBCR601_LIMITED)
                hdmi_info.bits.C0_C1 = COLORIMETRY_ITU601;
        else {
                hdmi_info.bits.C0_C1 = COLORIMETRY_NO_DATA;
        }
        if (color_space == COLOR_SPACE_2020_RGB_FULLRANGE ||
                        color_space == COLOR_SPACE_2020_RGB_LIMITEDRANGE ||
                        color_space == COLOR_SPACE_2020_YCBCR) {
                hdmi_info.bits.EC0_EC2 = COLORIMETRYEX_BT2020RGBYCBCR;
                hdmi_info.bits.C0_C1   = COLORIMETRY_EXTENDED;
        } else if (color_space == COLOR_SPACE_ADOBERGB) {
                hdmi_info.bits.EC0_EC2 = COLORIMETRYEX_ADOBERGB;
                hdmi_info.bits.C0_C1   = COLORIMETRY_EXTENDED;
        }

        /* TODO: un-hardcode aspect ratio */
        aspect = stream->timing.aspect_ratio;

        switch (aspect) {
        case ASPECT_RATIO_4_3:
        case ASPECT_RATIO_16_9:
                hdmi_info.bits.M0_M1 = aspect;
                break;

        case ASPECT_RATIO_NO_DATA:
        case ASPECT_RATIO_64_27:
        case ASPECT_RATIO_256_135:
        default:
                hdmi_info.bits.M0_M1 = 0;
        }

        /* Active Format Aspect ratio - same as Picture Aspect Ratio. */
        hdmi_info.bits.R0_R3 = ACTIVE_FORMAT_ASPECT_RATIO_SAME_AS_PICTURE;

        /* TODO: un-hardcode cn0_cn1 and itc */

        cn0_cn1 = 0;
        cn0_cn1_value = 0;

        itc = true;
        itc_value = 1;

        support = stream->content_support;

        if (itc) {
                if (!support.bits.valid_content_type) {
                        cn0_cn1_value = 0;
                } else {
                        if (cn0_cn1 == DISPLAY_CONTENT_TYPE_GRAPHICS) {
                                if (support.bits.graphics_content == 1) {
                                        cn0_cn1_value = 0;
                                }
                        } else if (cn0_cn1 == DISPLAY_CONTENT_TYPE_PHOTO) {
                                if (support.bits.photo_content == 1) {
                                        cn0_cn1_value = 1;
                                } else {
                                        cn0_cn1_value = 0;
                                        itc_value = 0;
                                }
                        } else if (cn0_cn1 == DISPLAY_CONTENT_TYPE_CINEMA) {
                                if (support.bits.cinema_content == 1) {
                                        cn0_cn1_value = 2;
                                } else {
                                        cn0_cn1_value = 0;
                                        itc_value = 0;
                                }
                        } else if (cn0_cn1 == DISPLAY_CONTENT_TYPE_GAME) {
                                if (support.bits.game_content == 1) {
                                        cn0_cn1_value = 3;
                                } else {
                                        cn0_cn1_value = 0;
                                        itc_value = 0;
                                }
                        }
                }
                hdmi_info.bits.CN0_CN1 = cn0_cn1_value;
                hdmi_info.bits.ITC = itc_value;
        }

        /* TODO : We should handle YCC quantization */
        /* but we do not have matrix calculation */
        if (stream->qs_bit == 1 &&
                        stream->qy_bit == 1) {
                if (color_space == COLOR_SPACE_SRGB ||
                        color_space == COLOR_SPACE_2020_RGB_FULLRANGE) {
                        hdmi_info.bits.Q0_Q1   = RGB_QUANTIZATION_FULL_RANGE;
                        hdmi_info.bits.YQ0_YQ1 = YYC_QUANTIZATION_FULL_RANGE;
                } else if (color_space == COLOR_SPACE_SRGB_LIMITED ||
                                        color_space == COLOR_SPACE_2020_RGB_LIMITEDRANGE) {
                        hdmi_info.bits.Q0_Q1   = RGB_QUANTIZATION_LIMITED_RANGE;
                        hdmi_info.bits.YQ0_YQ1 = YYC_QUANTIZATION_LIMITED_RANGE;
                } else {
                        hdmi_info.bits.Q0_Q1   = RGB_QUANTIZATION_DEFAULT_RANGE;
                        hdmi_info.bits.YQ0_YQ1 = YYC_QUANTIZATION_LIMITED_RANGE;
                }
        } else {
                hdmi_info.bits.Q0_Q1   = RGB_QUANTIZATION_DEFAULT_RANGE;
                hdmi_info.bits.YQ0_YQ1   = YYC_QUANTIZATION_LIMITED_RANGE;
        }

        ///VIC
        format = stream->timing.timing_3d_format;
        /*todo, add 3DStereo support*/
        if (format != TIMING_3D_FORMAT_NONE) {
                // Based on HDMI specs hdmi vic needs to be converted to cea vic when 3D is enabled
                switch (pipe_ctx->stream->timing.hdmi_vic) {
                case 1:
                        vic = 95;
                        break;
                case 2:
                        vic = 94;
                        break;
                case 3:
                        vic = 93;
                        break;
                case 4:
                        vic = 98;
                        break;
                default:
                        break;
                }
        }
        /* If VIC >= 128, the Source shall use AVI InfoFrame Version 3*/
        hdmi_info.bits.VIC0_VIC7 = vic;
        if (vic >= 128)
                hdmi_info.bits.header.version = 3;
        /* If (C1, C0)=(1, 1) and (EC2, EC1, EC0)=(1, 1, 1),
         * the Source shall use 20 AVI InfoFrame Version 4
         */
        if (hdmi_info.bits.C0_C1 == COLORIMETRY_EXTENDED &&
                        hdmi_info.bits.EC0_EC2 == COLORIMETRYEX_RESERVED) {
                hdmi_info.bits.header.version = 4;
                hdmi_info.bits.header.length = 14;
        }

        /* pixel repetition
         * PR0 - PR3 start from 0 whereas pHwPathMode->mode.timing.flags.pixel
         * repetition start from 1 */
        hdmi_info.bits.PR0_PR3 = 0;

        /* Bar Info
         * barTop:    Line Number of End of Top Bar.
         * barBottom: Line Number of Start of Bottom Bar.
         * barLeft:   Pixel Number of End of Left Bar.
         * barRight:  Pixel Number of Start of Right Bar. */
        hdmi_info.bits.bar_top = stream->timing.v_border_top;
        hdmi_info.bits.bar_bottom = (stream->timing.v_total
                        - stream->timing.v_border_bottom + 1);
        hdmi_info.bits.bar_left  = stream->timing.h_border_left;
        hdmi_info.bits.bar_right = (stream->timing.h_total
                        - stream->timing.h_border_right + 1);

    /* Additional Colorimetry Extension
     * Used in conduction with C0-C1 and EC0-EC2
     * 0 = DCI-P3 RGB (D65)
     * 1 = DCI-P3 RGB (theater)
     */
        hdmi_info.bits.ACE0_ACE3 = 0;

        /* check_sum - Calculate AFMT_AVI_INFO0 ~ AFMT_AVI_INFO3 */
        check_sum = &hdmi_info.packet_raw_data.sb[0];

        *check_sum = HDMI_INFOFRAME_TYPE_AVI + hdmi_info.bits.header.length + hdmi_info.bits.header.version;

        for (byte_index = 1; byte_index <= hdmi_info.bits.header.length; byte_index++)
                *check_sum += hdmi_info.packet_raw_data.sb[byte_index];

        /* one byte complement */
        *check_sum = (uint8_t) (0x100 - *check_sum);

        /* Store in hw_path_mode */
        info_packet->hb0 = hdmi_info.packet_raw_data.hb0;
        info_packet->hb1 = hdmi_info.packet_raw_data.hb1;
        info_packet->hb2 = hdmi_info.packet_raw_data.hb2;

        for (byte_index = 0; byte_index < sizeof(hdmi_info.packet_raw_data.sb); byte_index++)
                info_packet->sb[byte_index] = hdmi_info.packet_raw_data.sb[byte_index];

        info_packet->valid = true;
}

static void set_vendor_info_packet(
                struct dc_info_packet *info_packet,
                struct dc_stream_state *stream)
{
        /* SPD info packet for FreeSync */

        /* Check if Freesync is supported. Return if false. If true,
         * set the corresponding bit in the info packet
         */
        if (!stream->vsp_infopacket.valid)
                return;

        *info_packet = stream->vsp_infopacket;
}

static void set_spd_info_packet(
                struct dc_info_packet *info_packet,
                struct dc_stream_state *stream)
{
        /* SPD info packet for FreeSync */

        /* Check if Freesync is supported. Return if false. If true,
         * set the corresponding bit in the info packet
         */
        if (!stream->vrr_infopacket.valid)
                return;

        *info_packet = stream->vrr_infopacket;
}

static void set_hdr_static_info_packet(
                struct dc_info_packet *info_packet,
                struct dc_stream_state *stream)
{
        /* HDR Static Metadata info packet for HDR10 */

        if (!stream->hdr_static_metadata.valid ||
                        stream->use_dynamic_meta)
                return;

        *info_packet = stream->hdr_static_metadata;
}

static void set_vsc_info_packet(
                struct dc_info_packet *info_packet,
                struct dc_stream_state *stream)
{
        if (!stream->vsc_infopacket.valid)
                return;

        *info_packet = stream->vsc_infopacket;
}

void dc_resource_state_destruct(struct dc_state *context)
{
        int i, j;

        for (i = 0; i < context->stream_count; i++) {
                for (j = 0; j < context->stream_status[i].plane_count; j++)
                        dc_plane_state_release(
                                context->stream_status[i].plane_states[j]);

                context->stream_status[i].plane_count = 0;
                dc_stream_release(context->streams[i]);
                context->streams[i] = NULL;
        }
}

void dc_resource_state_copy_construct(
                const struct dc_state *src_ctx,
                struct dc_state *dst_ctx)
{
        int i, j;
        struct kref refcount = dst_ctx->refcount;

        *dst_ctx = *src_ctx;

        for (i = 0; i < MAX_PIPES; i++) {
                struct pipe_ctx *cur_pipe = &dst_ctx->res_ctx.pipe_ctx[i];

                if (cur_pipe->top_pipe)
                        cur_pipe->top_pipe =  &dst_ctx->res_ctx.pipe_ctx[cur_pipe->top_pipe->pipe_idx];

                if (cur_pipe->bottom_pipe)
                        cur_pipe->bottom_pipe = &dst_ctx->res_ctx.pipe_ctx[cur_pipe->bottom_pipe->pipe_idx];
        }

        for (i = 0; i < dst_ctx->stream_count; i++) {
                dc_stream_retain(dst_ctx->streams[i]);
                for (j = 0; j < dst_ctx->stream_status[i].plane_count; j++)
                        dc_plane_state_retain(
                                dst_ctx->stream_status[i].plane_states[j]);
        }

        /* context refcount should not be overridden */
        dst_ctx->refcount = refcount;

}

struct clock_source *dc_resource_find_first_free_pll(
                struct resource_context *res_ctx,
                const struct resource_pool *pool)
{
        int i;

        for (i = 0; i < pool->clk_src_count; ++i) {
                if (res_ctx->clock_source_ref_count[i] == 0)
                        return pool->clock_sources[i];
        }

        return NULL;
}

void resource_build_info_frame(struct pipe_ctx *pipe_ctx)
{
        enum signal_type signal = SIGNAL_TYPE_NONE;
        struct encoder_info_frame *info = &pipe_ctx->stream_res.encoder_info_frame;

        /* default all packets to invalid */
        info->avi.valid = false;
        info->gamut.valid = false;
        info->vendor.valid = false;
        info->spd.valid = false;
        info->hdrsmd.valid = false;
        info->vsc.valid = false;

        signal = pipe_ctx->stream->signal;

        /* HDMi and DP have different info packets*/
        if (dc_is_hdmi_signal(signal)) {
                set_avi_info_frame(&info->avi, pipe_ctx);

                set_vendor_info_packet(&info->vendor, pipe_ctx->stream);

                set_spd_info_packet(&info->spd, pipe_ctx->stream);

                set_hdr_static_info_packet(&info->hdrsmd, pipe_ctx->stream);

        } else if (dc_is_dp_signal(signal)) {
                set_vsc_info_packet(&info->vsc, pipe_ctx->stream);

                set_spd_info_packet(&info->spd, pipe_ctx->stream);

                set_hdr_static_info_packet(&info->hdrsmd, pipe_ctx->stream);
        }

        patch_gamut_packet_checksum(&info->gamut);
}

enum dc_status resource_map_clock_resources(
                const struct dc  *dc,
                struct dc_state *context,
                struct dc_stream_state *stream)
{
        /* acquire new resources */
        const struct resource_pool *pool = dc->res_pool;
        struct pipe_ctx *pipe_ctx = resource_get_head_pipe_for_stream(
                                &context->res_ctx, stream);

        if (!pipe_ctx)
                return DC_ERROR_UNEXPECTED;

        if (dc_is_dp_signal(pipe_ctx->stream->signal)
                || pipe_ctx->stream->signal == SIGNAL_TYPE_VIRTUAL)
                pipe_ctx->clock_source = pool->dp_clock_source;
        else {
                pipe_ctx->clock_source = NULL;

                if (!dc->config.disable_disp_pll_sharing)
                        pipe_ctx->clock_source = resource_find_used_clk_src_for_sharing(
                                &context->res_ctx,
                                pipe_ctx);

                if (pipe_ctx->clock_source == NULL)
                        pipe_ctx->clock_source =
                                dc_resource_find_first_free_pll(
                                        &context->res_ctx,
                                        pool);
        }

        if (pipe_ctx->clock_source == NULL)
                return DC_NO_CLOCK_SOURCE_RESOURCE;

        resource_reference_clock_source(
                &context->res_ctx, pool,
                pipe_ctx->clock_source);

        return DC_OK;
}

/*
 * Note: We need to disable output if clock sources change,
 * since bios does optimization and doesn't apply if changing
 * PHY when not already disabled.
 */
bool pipe_need_reprogram(
                struct pipe_ctx *pipe_ctx_old,
                struct pipe_ctx *pipe_ctx)
{
        if (!pipe_ctx_old->stream)
                return false;

        if (pipe_ctx_old->stream->sink != pipe_ctx->stream->sink)
                return true;

        if (pipe_ctx_old->stream->signal != pipe_ctx->stream->signal)
                return true;

        if (pipe_ctx_old->stream_res.audio != pipe_ctx->stream_res.audio)
                return true;

        if (pipe_ctx_old->clock_source != pipe_ctx->clock_source
                        && pipe_ctx_old->stream != pipe_ctx->stream)
                return true;

        if (pipe_ctx_old->stream_res.stream_enc != pipe_ctx->stream_res.stream_enc)
                return true;

        if (is_timing_changed(pipe_ctx_old->stream, pipe_ctx->stream))
                return true;

        if (is_hdr_static_meta_changed(pipe_ctx_old->stream, pipe_ctx->stream))
                return true;

        if (pipe_ctx_old->stream->dpms_off != pipe_ctx->stream->dpms_off)
                return true;

        if (is_vsc_info_packet_changed(pipe_ctx_old->stream, pipe_ctx->stream))
                return true;

        if (false == pipe_ctx_old->stream->link->link_state_valid &&
                false == pipe_ctx_old->stream->dpms_off)
                return true;

        return false;
}

void resource_build_bit_depth_reduction_params(struct dc_stream_state *stream,
                struct bit_depth_reduction_params *fmt_bit_depth)
{
        enum dc_dither_option option = stream->dither_option;
        enum dc_pixel_encoding pixel_encoding =
                        stream->timing.pixel_encoding;

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

        if (option == DITHER_OPTION_DEFAULT) {
                switch (stream->timing.display_color_depth) {
                case COLOR_DEPTH_666:
                        option = DITHER_OPTION_SPATIAL6;
                        break;
                case COLOR_DEPTH_888:
                        option = DITHER_OPTION_SPATIAL8;
                        break;
                case COLOR_DEPTH_101010:
                        option = DITHER_OPTION_SPATIAL10;
                        break;
                default:
                        option = DITHER_OPTION_DISABLE;
                }
        }

        if (option == DITHER_OPTION_DISABLE)
                return;

        if (option == DITHER_OPTION_TRUN6) {
                fmt_bit_depth->flags.TRUNCATE_ENABLED = 1;
                fmt_bit_depth->flags.TRUNCATE_DEPTH = 0;
        } else if (option == DITHER_OPTION_TRUN8 ||
                        option == DITHER_OPTION_TRUN8_SPATIAL6 ||
                        option == DITHER_OPTION_TRUN8_FM6) {
                fmt_bit_depth->flags.TRUNCATE_ENABLED = 1;
                fmt_bit_depth->flags.TRUNCATE_DEPTH = 1;
        } else if (option == DITHER_OPTION_TRUN10        ||
                        option == DITHER_OPTION_TRUN10_SPATIAL6   ||
                        option == DITHER_OPTION_TRUN10_SPATIAL8   ||
                        option == DITHER_OPTION_TRUN10_FM8     ||
                        option == DITHER_OPTION_TRUN10_FM6     ||
                        option == DITHER_OPTION_TRUN10_SPATIAL8_FM6) {
                fmt_bit_depth->flags.TRUNCATE_ENABLED = 1;
                fmt_bit_depth->flags.TRUNCATE_DEPTH = 2;
        }

        /* special case - Formatter can only reduce by 4 bits at most.
         * When reducing from 12 to 6 bits,
         * HW recommends we use trunc with round mode
         * (if we did nothing, trunc to 10 bits would be used)
         * note that any 12->10 bit reduction is ignored prior to DCE8,
         * as the input was 10 bits.
         */
        if (option == DITHER_OPTION_SPATIAL6_FRAME_RANDOM ||
                        option == DITHER_OPTION_SPATIAL6 ||
                        option == DITHER_OPTION_FM6) {
                fmt_bit_depth->flags.TRUNCATE_ENABLED = 1;
                fmt_bit_depth->flags.TRUNCATE_DEPTH = 2;
                fmt_bit_depth->flags.TRUNCATE_MODE = 1;
        }

        /* spatial dither
         * note that spatial modes 1-3 are never used
         */
        if (option == DITHER_OPTION_SPATIAL6_FRAME_RANDOM            ||
                        option == DITHER_OPTION_SPATIAL6 ||
                        option == DITHER_OPTION_TRUN10_SPATIAL6      ||
                        option == DITHER_OPTION_TRUN8_SPATIAL6) {
                fmt_bit_depth->flags.SPATIAL_DITHER_ENABLED = 1;
                fmt_bit_depth->flags.SPATIAL_DITHER_DEPTH = 0;
                fmt_bit_depth->flags.HIGHPASS_RANDOM = 1;
                fmt_bit_depth->flags.RGB_RANDOM =
                                (pixel_encoding == PIXEL_ENCODING_RGB) ? 1 : 0;
        } else if (option == DITHER_OPTION_SPATIAL8_FRAME_RANDOM            ||
                        option == DITHER_OPTION_SPATIAL8 ||
                        option == DITHER_OPTION_SPATIAL8_FM6        ||
                        option == DITHER_OPTION_TRUN10_SPATIAL8      ||
                        option == DITHER_OPTION_TRUN10_SPATIAL8_FM6) {
                fmt_bit_depth->flags.SPATIAL_DITHER_ENABLED = 1;
                fmt_bit_depth->flags.SPATIAL_DITHER_DEPTH = 1;
                fmt_bit_depth->flags.HIGHPASS_RANDOM = 1;
                fmt_bit_depth->flags.RGB_RANDOM =
                                (pixel_encoding == PIXEL_ENCODING_RGB) ? 1 : 0;
        } else if (option == DITHER_OPTION_SPATIAL10_FRAME_RANDOM ||
                        option == DITHER_OPTION_SPATIAL10 ||
                        option == DITHER_OPTION_SPATIAL10_FM8 ||
                        option == DITHER_OPTION_SPATIAL10_FM6) {
                fmt_bit_depth->flags.SPATIAL_DITHER_ENABLED = 1;
                fmt_bit_depth->flags.SPATIAL_DITHER_DEPTH = 2;
                fmt_bit_depth->flags.HIGHPASS_RANDOM = 1;
                fmt_bit_depth->flags.RGB_RANDOM =
                                (pixel_encoding == PIXEL_ENCODING_RGB) ? 1 : 0;
        }

        if (option == DITHER_OPTION_SPATIAL6 ||
                        option == DITHER_OPTION_SPATIAL8 ||
                        option == DITHER_OPTION_SPATIAL10) {
                fmt_bit_depth->flags.FRAME_RANDOM = 0;
        } else {
                fmt_bit_depth->flags.FRAME_RANDOM = 1;
        }

        //////////////////////
        //// temporal dither
        //////////////////////
        if (option == DITHER_OPTION_FM6           ||
                        option == DITHER_OPTION_SPATIAL8_FM6     ||
                        option == DITHER_OPTION_SPATIAL10_FM6     ||
                        option == DITHER_OPTION_TRUN10_FM6     ||
                        option == DITHER_OPTION_TRUN8_FM6      ||
                        option == DITHER_OPTION_TRUN10_SPATIAL8_FM6) {
                fmt_bit_depth->flags.FRAME_MODULATION_ENABLED = 1;
                fmt_bit_depth->flags.FRAME_MODULATION_DEPTH = 0;
        } else if (option == DITHER_OPTION_FM8        ||
                        option == DITHER_OPTION_SPATIAL10_FM8  ||
                        option == DITHER_OPTION_TRUN10_FM8) {
                fmt_bit_depth->flags.FRAME_MODULATION_ENABLED = 1;
                fmt_bit_depth->flags.FRAME_MODULATION_DEPTH = 1;
        } else if (option == DITHER_OPTION_FM10) {
                fmt_bit_depth->flags.FRAME_MODULATION_ENABLED = 1;
                fmt_bit_depth->flags.FRAME_MODULATION_DEPTH = 2;
        }

        fmt_bit_depth->pixel_encoding = pixel_encoding;
}

enum dc_status dc_validate_stream(struct dc *dc, struct dc_stream_state *stream)
{
        struct dc  *core_dc = dc;
        struct dc_link *link = stream->link;
        struct timing_generator *tg = core_dc->res_pool->timing_generators[0];
        enum dc_status res = DC_OK;

        calculate_phy_pix_clks(stream);

        if (!tg->funcs->validate_timing(tg, &stream->timing))
                res = DC_FAIL_CONTROLLER_VALIDATE;

        if (res == DC_OK) {
                if (!link->link_enc->funcs->validate_output_with_stream(
                                                link->link_enc, stream))
                        res = DC_FAIL_ENC_VALIDATE;
        }

        /* TODO: validate audio ASIC caps, encoder */

        if (res == DC_OK)
                res = dc_link_validate_mode_timing(stream,
                      link,
                      &stream->timing);

        return res;
}

enum dc_status dc_validate_plane(struct dc *dc, const struct dc_plane_state *plane_state)
{
        enum dc_status res = DC_OK;

        /* TODO For now validates pixel format only */
        if (dc->res_pool->funcs->validate_plane)
                return dc->res_pool->funcs->validate_plane(plane_state, &dc->caps);

        return res;
}

unsigned int resource_pixel_format_to_bpp(enum surface_pixel_format format)
{
        switch (format) {
        case SURFACE_PIXEL_FORMAT_GRPH_PALETA_256_COLORS:
                return 8;
        case SURFACE_PIXEL_FORMAT_VIDEO_420_YCbCr:
        case SURFACE_PIXEL_FORMAT_VIDEO_420_YCrCb:
                return 12;
        case SURFACE_PIXEL_FORMAT_GRPH_ARGB1555:
        case SURFACE_PIXEL_FORMAT_GRPH_RGB565:
        case SURFACE_PIXEL_FORMAT_VIDEO_420_10bpc_YCbCr:
        case SURFACE_PIXEL_FORMAT_VIDEO_420_10bpc_YCrCb:
                return 16;
        case SURFACE_PIXEL_FORMAT_GRPH_ARGB8888:
        case SURFACE_PIXEL_FORMAT_GRPH_ABGR8888:
        case SURFACE_PIXEL_FORMAT_GRPH_ARGB2101010:
        case SURFACE_PIXEL_FORMAT_GRPH_ABGR2101010:
        case SURFACE_PIXEL_FORMAT_GRPH_ABGR2101010_XR_BIAS:
                return 32;
        case SURFACE_PIXEL_FORMAT_GRPH_ARGB16161616:
        case SURFACE_PIXEL_FORMAT_GRPH_ARGB16161616F:
        case SURFACE_PIXEL_FORMAT_GRPH_ABGR16161616F:
                return 64;
        default:
                ASSERT_CRITICAL(false);
                return -1;
        }
}