/*
 * Copyright 2015 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 "dm_services.h"

#include "dc.h"

#include "core_status.h"
#include "core_types.h"
#include "hw_sequencer.h"
#include "dce/dce_hwseq.h"

#include "resource.h"

#include "clock_source.h"
#include "dc_bios_types.h"

#include "bios_parser_interface.h"
#include "include/irq_service_interface.h"
#include "transform.h"
#include "dmcu.h"
#include "dpp.h"
#include "timing_generator.h"
#include "abm.h"
#include "virtual/virtual_link_encoder.h"

#include "link_hwss.h"
#include "link_encoder.h"

#include "dc_link_ddc.h"
#include "dm_helpers.h"
#include "mem_input.h"
#include "hubp.h"

#include "dc_link_dp.h"

#include "dce/dce_i2c.h"

#define DC_LOGGER \
        dc->ctx->logger

static const char DC_BUILD_ID[] = "production-build";

/*******************************************************************************
 * Private functions
 ******************************************************************************/

static inline void elevate_update_type(enum surface_update_type *original, enum surface_update_type new)
{
        if (new > *original)
                *original = new;
}

static void destroy_links(struct dc *dc)
{
        uint32_t i;

        for (i = 0; i < dc->link_count; i++) {
                if (NULL != dc->links[i])
                        link_destroy(&dc->links[i]);
        }
}

static bool create_links(
                struct dc *dc,
                uint32_t num_virtual_links)
{
        int i;
        int connectors_num;
        struct dc_bios *bios = dc->ctx->dc_bios;

        dc->link_count = 0;

        connectors_num = bios->funcs->get_connectors_number(bios);

        if (connectors_num > ENUM_ID_COUNT) {
                dm_error(
                        "DC: Number of connectors %d exceeds maximum of %d!\n",
                        connectors_num,
                        ENUM_ID_COUNT);
                return false;
        }

        if (connectors_num == 0 && num_virtual_links == 0) {
                dm_error("DC: Number of connectors is zero!\n");
        }

        dm_output_to_console(
                "DC: %s: connectors_num: physical:%d, virtual:%d\n",
                __func__,
                connectors_num,
                num_virtual_links);

        for (i = 0; i < connectors_num; i++) {
                struct link_init_data link_init_params = {0};
                struct dc_link *link;

                link_init_params.ctx = dc->ctx;
                /* next BIOS object table connector */
                link_init_params.connector_index = i;
                link_init_params.link_index = dc->link_count;
                link_init_params.dc = dc;
                link = link_create(&link_init_params);

                if (link) {
                        dc->links[dc->link_count] = link;
                        link->dc = dc;
                        ++dc->link_count;
                }
        }

        for (i = 0; i < num_virtual_links; i++) {
                struct dc_link *link = kzalloc(sizeof(*link), GFP_KERNEL);
                struct encoder_init_data enc_init = {0};

                if (link == NULL) {
                        BREAK_TO_DEBUGGER();
                        goto failed_alloc;
                }

                link->link_index = dc->link_count;
                dc->links[dc->link_count] = link;
                dc->link_count++;

                link->ctx = dc->ctx;
                link->dc = dc;
                link->connector_signal = SIGNAL_TYPE_VIRTUAL;
                link->link_id.type = OBJECT_TYPE_CONNECTOR;
                link->link_id.id = CONNECTOR_ID_VIRTUAL;
                link->link_id.enum_id = ENUM_ID_1;
                link->link_enc = kzalloc(sizeof(*link->link_enc), GFP_KERNEL);

                if (!link->link_enc) {
                        BREAK_TO_DEBUGGER();
                        goto failed_alloc;
                }

                link->link_status.dpcd_caps = &link->dpcd_caps;

                enc_init.ctx = dc->ctx;
                enc_init.channel = CHANNEL_ID_UNKNOWN;
                enc_init.hpd_source = HPD_SOURCEID_UNKNOWN;
                enc_init.transmitter = TRANSMITTER_UNKNOWN;
                enc_init.connector = link->link_id;
                enc_init.encoder.type = OBJECT_TYPE_ENCODER;
                enc_init.encoder.id = ENCODER_ID_INTERNAL_VIRTUAL;
                enc_init.encoder.enum_id = ENUM_ID_1;
                virtual_link_encoder_construct(link->link_enc, &enc_init);
        }

        return true;

failed_alloc:
        return false;
}

/**
 *****************************************************************************
 *  Function: dc_stream_adjust_vmin_vmax
 *
 *  @brief
 *     Looks up the pipe context of dc_stream_state and updates the
 *     vertical_total_min and vertical_total_max of the DRR, Dynamic Refresh
 *     Rate, which is a power-saving feature that targets reducing panel
 *     refresh rate while the screen is static
 *
 *  @param [in] dc: dc reference
 *  @param [in] stream: Initial dc stream state
 *  @param [in] adjust: Updated parameters for vertical_total_min and
 *  vertical_total_max
 *****************************************************************************
 */
bool dc_stream_adjust_vmin_vmax(struct dc *dc,
                struct dc_stream_state *stream,
                struct dc_crtc_timing_adjust *adjust)
{
        int i = 0;
        bool ret = false;

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

                if (pipe->stream == stream && pipe->stream_res.stream_enc) {
                        pipe->stream->adjust = *adjust;
                        dc->hwss.set_drr(&pipe,
                                        1,
                                        adjust->v_total_min,
                                        adjust->v_total_max);

                        ret = true;
                }
        }
        return ret;
}

bool dc_stream_get_crtc_position(struct dc *dc,
                struct dc_stream_state **streams, int num_streams,
                unsigned int *v_pos, unsigned int *nom_v_pos)
{
        /* TODO: Support multiple streams */
        const struct dc_stream_state *stream = streams[0];
        int i = 0;
        bool ret = false;
        struct crtc_position position;

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

                if (pipe->stream == stream && pipe->stream_res.stream_enc) {
                        dc->hwss.get_position(&pipe, 1, &position);

                        *v_pos = position.vertical_count;
                        *nom_v_pos = position.nominal_vcount;
                        ret = true;
                }
        }
        return ret;
}

/**
 * dc_stream_configure_crc: Configure CRC capture for the given stream.
 * @dc: DC Object
 * @stream: The stream to configure CRC on.
 * @enable: Enable CRC if true, disable otherwise.
 * @continuous: Capture CRC on every frame if true. Otherwise, only capture
 *              once.
 *
 * By default, only CRC0 is configured, and the entire frame is used to
 * calculate the crc.
 */
bool dc_stream_configure_crc(struct dc *dc, struct dc_stream_state *stream,
                             bool enable, bool continuous)
{
        int i;
        struct pipe_ctx *pipe;
        struct crc_params param;
        struct timing_generator *tg;

        for (i = 0; i < MAX_PIPES; i++) {
                pipe = &dc->current_state->res_ctx.pipe_ctx[i];
                if (pipe->stream == stream)
                        break;
        }
        /* Stream not found */
        if (i == MAX_PIPES)
                return false;

        /* Always capture the full frame */
        param.windowa_x_start = 0;
        param.windowa_y_start = 0;
        param.windowa_x_end = pipe->stream->timing.h_addressable;
        param.windowa_y_end = pipe->stream->timing.v_addressable;
        param.windowb_x_start = 0;
        param.windowb_y_start = 0;
        param.windowb_x_end = pipe->stream->timing.h_addressable;
        param.windowb_y_end = pipe->stream->timing.v_addressable;

        /* Default to the union of both windows */
        param.selection = UNION_WINDOW_A_B;
        param.continuous_mode = continuous;
        param.enable = enable;

        tg = pipe->stream_res.tg;

        /* Only call if supported */
        if (tg->funcs->configure_crc)
                return tg->funcs->configure_crc(tg, &param);
        DC_LOG_WARNING("CRC capture not supported.");
        return false;
}

/**
 * dc_stream_get_crc: Get CRC values for the given stream.
 * @dc: DC object
 * @stream: The DC stream state of the stream to get CRCs from.
 * @r_cr, g_y, b_cb: CRC values for the three channels are stored here.
 *
 * dc_stream_configure_crc needs to be called beforehand to enable CRCs.
 * Return false if stream is not found, or if CRCs are not enabled.
 */
bool dc_stream_get_crc(struct dc *dc, struct dc_stream_state *stream,
                       uint32_t *r_cr, uint32_t *g_y, uint32_t *b_cb)
{
        int i;
        struct pipe_ctx *pipe;
        struct timing_generator *tg;

        for (i = 0; i < MAX_PIPES; i++) {
                pipe = &dc->current_state->res_ctx.pipe_ctx[i];
                if (pipe->stream == stream)
                        break;
        }
        /* Stream not found */
        if (i == MAX_PIPES)
                return false;

        tg = pipe->stream_res.tg;

        if (tg->funcs->get_crc)
                return tg->funcs->get_crc(tg, r_cr, g_y, b_cb);
        DC_LOG_WARNING("CRC capture not supported.");
        return false;
}

void dc_stream_set_dither_option(struct dc_stream_state *stream,
                enum dc_dither_option option)
{
        struct bit_depth_reduction_params params;
        struct dc_link *link = stream->status.link;
        struct pipe_ctx *pipes = NULL;
        int i;

        for (i = 0; i < MAX_PIPES; i++) {
                if (link->dc->current_state->res_ctx.pipe_ctx[i].stream ==
                                stream) {
                        pipes = &link->dc->current_state->res_ctx.pipe_ctx[i];
                        break;
                }
        }

        if (!pipes)
                return;
        if (option > DITHER_OPTION_MAX)
                return;

        stream->dither_option = option;

        memset(&params, 0, sizeof(params));
        resource_build_bit_depth_reduction_params(stream, &params);
        stream->bit_depth_params = params;

        if (pipes->plane_res.xfm &&
            pipes->plane_res.xfm->funcs->transform_set_pixel_storage_depth) {
                pipes->plane_res.xfm->funcs->transform_set_pixel_storage_depth(
                        pipes->plane_res.xfm,
                        pipes->plane_res.scl_data.lb_params.depth,
                        &stream->bit_depth_params);
        }

        pipes->stream_res.opp->funcs->
                opp_program_bit_depth_reduction(pipes->stream_res.opp, &params);
}

bool dc_stream_set_gamut_remap(struct dc *dc, const struct dc_stream_state *stream)
{
        int i = 0;
        bool ret = false;
        struct pipe_ctx *pipes;

        for (i = 0; i < MAX_PIPES; i++) {
                if (dc->current_state->res_ctx.pipe_ctx[i].stream == stream) {
                        pipes = &dc->current_state->res_ctx.pipe_ctx[i];
                        dc->hwss.program_gamut_remap(pipes);
                        ret = true;
                }
        }

        return ret;
}

bool dc_stream_program_csc_matrix(struct dc *dc, struct dc_stream_state *stream)
{
        int i = 0;
        bool ret = false;
        struct pipe_ctx *pipes;

        for (i = 0; i < MAX_PIPES; i++) {
                if (dc->current_state->res_ctx.pipe_ctx[i].stream
                                == stream) {

                        pipes = &dc->current_state->res_ctx.pipe_ctx[i];
                        dc->hwss.program_csc_matrix(pipes,
                        stream->output_color_space,
                        stream->csc_color_matrix.matrix);
                        ret = true;
                }
        }

        return ret;
}

void dc_stream_set_static_screen_events(struct dc *dc,
                struct dc_stream_state **streams,
                int num_streams,
                const struct dc_static_screen_events *events)
{
        int i = 0;
        int j = 0;
        struct pipe_ctx *pipes_affected[MAX_PIPES];
        int num_pipes_affected = 0;

        for (i = 0; i < num_streams; i++) {
                struct dc_stream_state *stream = streams[i];

                for (j = 0; j < MAX_PIPES; j++) {
                        if (dc->current_state->res_ctx.pipe_ctx[j].stream
                                        == stream) {
                                pipes_affected[num_pipes_affected++] =
                                                &dc->current_state->res_ctx.pipe_ctx[j];
                        }
                }
        }

        dc->hwss.set_static_screen_control(pipes_affected, num_pipes_affected, events);
}

void dc_link_set_drive_settings(struct dc *dc,
                                struct link_training_settings *lt_settings,
                                const struct dc_link *link)
{

        int i;

        for (i = 0; i < dc->link_count; i++) {
                if (dc->links[i] == link)
                        break;
        }

        if (i >= dc->link_count)
                ASSERT_CRITICAL(false);

        dc_link_dp_set_drive_settings(dc->links[i], lt_settings);
}

void dc_link_perform_link_training(struct dc *dc,
                                   struct dc_link_settings *link_setting,
                                   bool skip_video_pattern)
{
        int i;

        for (i = 0; i < dc->link_count; i++)
                dc_link_dp_perform_link_training(
                        dc->links[i],
                        link_setting,
                        skip_video_pattern);
}

void dc_link_set_preferred_link_settings(struct dc *dc,
                                         struct dc_link_settings *link_setting,
                                         struct dc_link *link)
{
        int i;
        struct pipe_ctx *pipe;
        struct dc_stream_state *link_stream;
        struct dc_link_settings store_settings = *link_setting;

        for (i = 0; i < MAX_PIPES; i++) {
                pipe = &dc->current_state->res_ctx.pipe_ctx[i];
                if (pipe->stream && pipe->stream->sink
                        && pipe->stream->sink->link) {
                        if (pipe->stream->sink->link == link)
                                break;
                }
        }

        /* Stream not found */
        if (i == MAX_PIPES)
                return;

        link_stream = link->dc->current_state->res_ctx.pipe_ctx[i].stream;

        link->preferred_link_setting = store_settings;
        if (link_stream)
                decide_link_settings(link_stream, &store_settings);

        if ((store_settings.lane_count != LANE_COUNT_UNKNOWN) &&
                (store_settings.link_rate != LINK_RATE_UNKNOWN))
                dp_retrain_link_dp_test(link, &store_settings, false);
}

void dc_link_enable_hpd(const struct dc_link *link)
{
        dc_link_dp_enable_hpd(link);
}

void dc_link_disable_hpd(const struct dc_link *link)
{
        dc_link_dp_disable_hpd(link);
}


void dc_link_set_test_pattern(struct dc_link *link,
                              enum dp_test_pattern test_pattern,
                              const struct link_training_settings *p_link_settings,
                              const unsigned char *p_custom_pattern,
                              unsigned int cust_pattern_size)
{
        if (link != NULL)
                dc_link_dp_set_test_pattern(
                        link,
                        test_pattern,
                        p_link_settings,
                        p_custom_pattern,
                        cust_pattern_size);
}

static void destruct(struct dc *dc)
{
        dc_release_state(dc->current_state);
        dc->current_state = NULL;

        destroy_links(dc);

        dc_destroy_resource_pool(dc);

        if (dc->ctx->gpio_service)
                dal_gpio_service_destroy(&dc->ctx->gpio_service);

        if (dc->ctx->i2caux)
                dal_i2caux_destroy(&dc->ctx->i2caux);

        if (dc->ctx->created_bios)
                dal_bios_parser_destroy(&dc->ctx->dc_bios);

        kfree(dc->ctx);
        dc->ctx = NULL;

        kfree(dc->bw_vbios);
        dc->bw_vbios = NULL;

        kfree(dc->bw_dceip);
        dc->bw_dceip = NULL;

#ifdef CONFIG_DRM_AMD_DC_DCN1_0
        kfree(dc->dcn_soc);
        dc->dcn_soc = NULL;

        kfree(dc->dcn_ip);
        dc->dcn_ip = NULL;

#endif
}

static bool construct(struct dc *dc,
                const struct dc_init_data *init_params)
{
        struct dc_context *dc_ctx;
        struct bw_calcs_dceip *dc_dceip;
        struct bw_calcs_vbios *dc_vbios;
#ifdef CONFIG_DRM_AMD_DC_DCN1_0
        struct dcn_soc_bounding_box *dcn_soc;
        struct dcn_ip_params *dcn_ip;
#endif

        enum dce_version dc_version = DCE_VERSION_UNKNOWN;

        dc_dceip = kzalloc(sizeof(*dc_dceip), GFP_KERNEL);
        if (!dc_dceip) {
                dm_error("%s: failed to create dceip\n", __func__);
                goto fail;
        }

        dc->bw_dceip = dc_dceip;

        dc_vbios = kzalloc(sizeof(*dc_vbios), GFP_KERNEL);
        if (!dc_vbios) {
                dm_error("%s: failed to create vbios\n", __func__);
                goto fail;
        }

        dc->bw_vbios = dc_vbios;
#ifdef CONFIG_DRM_AMD_DC_DCN1_0
        dcn_soc = kzalloc(sizeof(*dcn_soc), GFP_KERNEL);
        if (!dcn_soc) {
                dm_error("%s: failed to create dcn_soc\n", __func__);
                goto fail;
        }

        dc->dcn_soc = dcn_soc;

        dcn_ip = kzalloc(sizeof(*dcn_ip), GFP_KERNEL);
        if (!dcn_ip) {
                dm_error("%s: failed to create dcn_ip\n", __func__);
                goto fail;
        }

        dc->dcn_ip = dcn_ip;
#endif

        dc_ctx = kzalloc(sizeof(*dc_ctx), GFP_KERNEL);
        if (!dc_ctx) {
                dm_error("%s: failed to create ctx\n", __func__);
                goto fail;
        }

        dc_ctx->cgs_device = init_params->cgs_device;
        dc_ctx->driver_context = init_params->driver;
        dc_ctx->dc = dc;
        dc_ctx->asic_id = init_params->asic_id;
        dc_ctx->dc_sink_id_count = 0;
        dc->ctx = dc_ctx;

        dc->current_state = dc_create_state();

        if (!dc->current_state) {
                dm_error("%s: failed to create validate ctx\n", __func__);
                goto fail;
        }

        /* Create logger */

        dc_ctx->dce_environment = init_params->dce_environment;

        dc_version = resource_parse_asic_id(init_params->asic_id);
        dc_ctx->dce_version = dc_version;

        /* Resource should construct all asic specific resources.
         * This should be the only place where we need to parse the asic id
         */
        if (init_params->vbios_override)
                dc_ctx->dc_bios = init_params->vbios_override;
        else {
                /* Create BIOS parser */
                struct bp_init_data bp_init_data;

                bp_init_data.ctx = dc_ctx;
                bp_init_data.bios = init_params->asic_id.atombios_base_address;

                dc_ctx->dc_bios = dal_bios_parser_create(
                                &bp_init_data, dc_version);

                if (!dc_ctx->dc_bios) {
                        ASSERT_CRITICAL(false);
                        goto fail;
                }

                dc_ctx->created_bios = true;
                }

        /* Create I2C AUX */
        dc_ctx->i2caux = dal_i2caux_create(dc_ctx);

        if (!dc_ctx->i2caux) {
                ASSERT_CRITICAL(false);
                goto fail;
        }

        /* Create GPIO service */
        dc_ctx->gpio_service = dal_gpio_service_create(
                        dc_version,
                        dc_ctx->dce_environment,
                        dc_ctx);

        if (!dc_ctx->gpio_service) {
                ASSERT_CRITICAL(false);
                goto fail;
        }

        dc->res_pool = dc_create_resource_pool(
                        dc,
                        init_params->num_virtual_links,
                        dc_version,
                        init_params->asic_id);
        if (!dc->res_pool)
                goto fail;

        dc_resource_state_construct(dc, dc->current_state);

        if (!create_links(dc, init_params->num_virtual_links))
                goto fail;

        return true;

fail:

        destruct(dc);
        return false;
}

static void disable_dangling_plane(struct dc *dc, struct dc_state *context)
{
        int i, j;
        struct dc_state *dangling_context = dc_create_state();
        struct dc_state *current_ctx;

        if (dangling_context == NULL)
                return;

        dc_resource_state_copy_construct(dc->current_state, dangling_context);

        for (i = 0; i < dc->res_pool->pipe_count; i++) {
                struct dc_stream_state *old_stream =
                                dc->current_state->res_ctx.pipe_ctx[i].stream;
                bool should_disable = true;

                for (j = 0; j < context->stream_count; j++) {
                        if (old_stream == context->streams[j]) {
                                should_disable = false;
                                break;
                        }
                }
                if (should_disable && old_stream) {
                        dc_rem_all_planes_for_stream(dc, old_stream, dangling_context);
                        dc->hwss.apply_ctx_for_surface(dc, old_stream, 0, dangling_context);
                }
        }

        current_ctx = dc->current_state;
        dc->current_state = dangling_context;
        dc_release_state(current_ctx);
}

/*******************************************************************************
 * Public functions
 ******************************************************************************/

struct dc *dc_create(const struct dc_init_data *init_params)
{
        struct dc *dc = kzalloc(sizeof(*dc), GFP_KERNEL);
        unsigned int full_pipe_count;

        if (NULL == dc)
                goto alloc_fail;

        if (false == construct(dc, init_params))
                goto construct_fail;

        /*TODO: separate HW and SW initialization*/
        dc->hwss.init_hw(dc);

        full_pipe_count = dc->res_pool->pipe_count;
        if (dc->res_pool->underlay_pipe_index != NO_UNDERLAY_PIPE)
                full_pipe_count--;
        dc->caps.max_streams = min(
                        full_pipe_count,
                        dc->res_pool->stream_enc_count);

        dc->caps.max_links = dc->link_count;
        dc->caps.max_audios = dc->res_pool->audio_count;
        dc->caps.linear_pitch_alignment = 64;

        /* Populate versioning information */
        dc->versions.dc_ver = DC_VER;

        if (dc->res_pool->dmcu != NULL)
                dc->versions.dmcu_version = dc->res_pool->dmcu->dmcu_version;

        dc->config = init_params->flags;

        dc->build_id = DC_BUILD_ID;

        DC_LOG_DC("Display Core initialized\n");



        return dc;

construct_fail:
        kfree(dc);

alloc_fail:
        return NULL;
}

void dc_destroy(struct dc **dc)
{
        destruct(*dc);
        kfree(*dc);
        *dc = NULL;
}

static void enable_timing_multisync(
                struct dc *dc,
                struct dc_state *ctx)
{
        int i = 0, multisync_count = 0;
        int pipe_count = dc->res_pool->pipe_count;
        struct pipe_ctx *multisync_pipes[MAX_PIPES] = { NULL };

        for (i = 0; i < pipe_count; i++) {
                if (!ctx->res_ctx.pipe_ctx[i].stream ||
                                !ctx->res_ctx.pipe_ctx[i].stream->triggered_crtc_reset.enabled)
                        continue;
                if (ctx->res_ctx.pipe_ctx[i].stream == ctx->res_ctx.pipe_ctx[i].stream->triggered_crtc_reset.event_source)
                        continue;
                multisync_pipes[multisync_count] = &ctx->res_ctx.pipe_ctx[i];
                multisync_count++;
        }

        if (multisync_count > 0) {
                dc->hwss.enable_per_frame_crtc_position_reset(
                        dc, multisync_count, multisync_pipes);
        }
}

static void program_timing_sync(
                struct dc *dc,
                struct dc_state *ctx)
{
        int i, j;
        int group_index = 0;
        int pipe_count = dc->res_pool->pipe_count;
        struct pipe_ctx *unsynced_pipes[MAX_PIPES] = { NULL };

        for (i = 0; i < pipe_count; i++) {
                if (!ctx->res_ctx.pipe_ctx[i].stream || ctx->res_ctx.pipe_ctx[i].top_pipe)
                        continue;

                unsynced_pipes[i] = &ctx->res_ctx.pipe_ctx[i];
        }

        for (i = 0; i < pipe_count; i++) {
                int group_size = 1;
                struct pipe_ctx *pipe_set[MAX_PIPES];

                if (!unsynced_pipes[i])
                        continue;

                pipe_set[0] = unsynced_pipes[i];
                unsynced_pipes[i] = NULL;

                /* Add tg to the set, search rest of the tg's for ones with
                 * same timing, add all tgs with same timing to the group
                 */
                for (j = i + 1; j < pipe_count; j++) {
                        if (!unsynced_pipes[j])
                                continue;

                        if (resource_are_streams_timing_synchronizable(
                                        unsynced_pipes[j]->stream,
                                        pipe_set[0]->stream)) {
                                pipe_set[group_size] = unsynced_pipes[j];
                                unsynced_pipes[j] = NULL;
                                group_size++;
                        }
                }

                /* set first unblanked pipe as master */
                for (j = 0; j < group_size; j++) {
                        struct pipe_ctx *temp;

                        if (pipe_set[j]->stream_res.tg->funcs->is_blanked && !pipe_set[j]->stream_res.tg->funcs->is_blanked(pipe_set[j]->stream_res.tg)) {
                                if (j == 0)
                                        break;

                                temp = pipe_set[0];
                                pipe_set[0] = pipe_set[j];
                                pipe_set[j] = temp;
                                break;
                        }
                }

                /* remove any other unblanked pipes as they have already been synced */
                for (j = j + 1; j < group_size; j++) {
                        if (pipe_set[j]->stream_res.tg->funcs->is_blanked && !pipe_set[j]->stream_res.tg->funcs->is_blanked(pipe_set[j]->stream_res.tg)) {
                                group_size--;
                                pipe_set[j] = pipe_set[group_size];
                                j--;
                        }
                }

                if (group_size > 1) {
                        dc->hwss.enable_timing_synchronization(
                                dc, group_index, group_size, pipe_set);
                        group_index++;
                }
        }
}

static bool context_changed(
                struct dc *dc,
                struct dc_state *context)
{
        uint8_t i;

        if (context->stream_count != dc->current_state->stream_count)
                return true;

        for (i = 0; i < dc->current_state->stream_count; i++) {
                if (dc->current_state->streams[i] != context->streams[i])
                        return true;
        }

        return false;
}

bool dc_enable_stereo(
        struct dc *dc,
        struct dc_state *context,
        struct dc_stream_state *streams[],
        uint8_t stream_count)
{
        bool ret = true;
        int i, j;
        struct pipe_ctx *pipe;

        for (i = 0; i < MAX_PIPES; i++) {
                if (context != NULL)
                        pipe = &context->res_ctx.pipe_ctx[i];
                else
                        pipe = &dc->current_state->res_ctx.pipe_ctx[i];
                for (j = 0 ; pipe && j < stream_count; j++)  {
                        if (streams[j] && streams[j] == pipe->stream &&
                                dc->hwss.setup_stereo)
                                dc->hwss.setup_stereo(pipe, dc);
                }
        }

        return ret;
}

/*
 * Applies given context to HW and copy it into current context.
 * It's up to the user to release the src context afterwards.
 */
static enum dc_status dc_commit_state_no_check(struct dc *dc, struct dc_state *context)
{
        struct dc_bios *dcb = dc->ctx->dc_bios;
        enum dc_status result = DC_ERROR_UNEXPECTED;
        struct pipe_ctx *pipe;
        int i, k, l;
        struct dc_stream_state *dc_streams[MAX_STREAMS] = {0};

        disable_dangling_plane(dc, context);

        for (i = 0; i < context->stream_count; i++)
                dc_streams[i] =  context->streams[i];

        if (!dcb->funcs->is_accelerated_mode(dcb))
                dc->hwss.enable_accelerated_mode(dc, context);

        dc->hwss.set_bandwidth(dc, context, false);
DRM_DEBUG("dfly: set_bandwidth#1\n");

        /* re-program planes for existing stream, in case we need to
         * free up plane resource for later use
         */
        for (i = 0; i < context->stream_count; i++) {
                if (context->streams[i]->mode_changed) {
DRM_DEBUG("dfly: streams[%d].mode_changed == false\n", i);
                        continue;
                }

                dc->hwss.apply_ctx_for_surface(
                        dc, context->streams[i],
                        context->stream_status[i].plane_count,
                        context); /* use new pipe config in new context */
        }

        /* Program hardware */
        dc->hwss.ready_shared_resources(dc, context);
DRM_DEBUG("dfly: ready_shared_resources\n");

        for (i = 0; i < dc->res_pool->pipe_count; i++) {
                pipe = &context->res_ctx.pipe_ctx[i];
                dc->hwss.wait_for_mpcc_disconnect(dc, dc->res_pool, pipe);
        }

        result = dc->hwss.apply_ctx_to_hw(dc, context);
DRM_DEBUG("dfly: apply_ctx_to_hw result: %d\n", result);

        if (result != DC_OK) {
                return result;
        }

        if (context->stream_count > 1) {
                enable_timing_multisync(dc, context);
                program_timing_sync(dc, context);
        }

        /* Program all planes within new context*/
        for (i = 0; i < context->stream_count; i++) {
                const struct dc_sink *sink = context->streams[i]->sink;

                if (!context->streams[i]->mode_changed) {
DRM_DEBUG("dfly: streams[%d].mode_changed == false\n", i);
                        continue;
                }

                dc->hwss.apply_ctx_for_surface(
                                dc, context->streams[i],
                                context->stream_status[i].plane_count,
                                context);

                /*
                 * enable stereo
                 * TODO rework dc_enable_stereo call to work with validation sets?
                 */
                for (k = 0; k < MAX_PIPES; k++) {
                        pipe = &context->res_ctx.pipe_ctx[k];

                        for (l = 0 ; pipe && l < context->stream_count; l++)  {
                                if (context->streams[l] &&
                                        context->streams[l] == pipe->stream &&
                                        dc->hwss.setup_stereo)
                                        dc->hwss.setup_stereo(pipe, dc);
                        }
                }

                CONN_MSG_MODE(sink->link, "{%dx%d, %dx%d@%dKhz}",
                                context->streams[i]->timing.h_addressable,
                                context->streams[i]->timing.v_addressable,
                                context->streams[i]->timing.h_total,
                                context->streams[i]->timing.v_total,
                                context->streams[i]->timing.pix_clk_khz);
        }

        dc_enable_stereo(dc, context, dc_streams, context->stream_count);

        /* pplib is notified if disp_num changed */
        dc->hwss.set_bandwidth(dc, context, true);
DRM_DEBUG("dfly: set_bandwidth#2\n");

        dc_release_state(dc->current_state);

        dc->current_state = context;

        dc_retain_state(dc->current_state);

        dc->hwss.optimize_shared_resources(dc);

        return result;
}

bool dc_commit_state(struct dc *dc, struct dc_state *context)
{
        enum dc_status result = DC_ERROR_UNEXPECTED;
        int i;

        if (false == context_changed(dc, context))
                return DC_OK;

        DC_LOG_DC("%s: %d streams\n",
                                __func__, context->stream_count);

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

                dc_stream_log(dc, stream);
        }

        result = dc_commit_state_no_check(dc, context);

        return (result == DC_OK);
}

bool dc_post_update_surfaces_to_stream(struct dc *dc)
{
        int i;
        struct dc_state *context = dc->current_state;

        post_surface_trace(dc);

        for (i = 0; i < dc->res_pool->pipe_count; i++)
                if (context->res_ctx.pipe_ctx[i].stream == NULL ||
                    context->res_ctx.pipe_ctx[i].plane_state == NULL) {
                        context->res_ctx.pipe_ctx[i].pipe_idx = i;
                        dc->hwss.disable_plane(dc, &context->res_ctx.pipe_ctx[i]);
                }

        dc->optimized_required = false;

        dc->hwss.set_bandwidth(dc, context, true);
        return true;
}

struct dc_state *dc_create_state(void)
{
        struct dc_state *context = kzalloc(sizeof(struct dc_state),
                                           GFP_KERNEL);

        if (!context)
                return NULL;

        kref_init(&context->refcount);
        return context;
}

void dc_retain_state(struct dc_state *context)
{
        kref_get(&context->refcount);
}

static void dc_state_free(struct kref *kref)
{
        struct dc_state *context = container_of(kref, struct dc_state, refcount);
        dc_resource_state_destruct(context);
        kfree(context);
}

void dc_release_state(struct dc_state *context)
{
        kref_put(&context->refcount, dc_state_free);
}

static bool is_surface_in_context(
                const struct dc_state *context,
                const struct dc_plane_state *plane_state)
{
        int j;

        for (j = 0; j < MAX_PIPES; j++) {
                const struct pipe_ctx *pipe_ctx = &context->res_ctx.pipe_ctx[j];

                if (plane_state == pipe_ctx->plane_state) {
                        return true;
                }
        }

        return false;
}

static enum surface_update_type get_plane_info_update_type(const struct dc_surface_update *u)
{
        union surface_update_flags *update_flags = &u->surface->update_flags;

        if (!u->plane_info)
                return UPDATE_TYPE_FAST;

        if (u->plane_info->color_space != u->surface->color_space)
                update_flags->bits.color_space_change = 1;

        if (u->plane_info->horizontal_mirror != u->surface->horizontal_mirror)
                update_flags->bits.horizontal_mirror_change = 1;

        if (u->plane_info->rotation != u->surface->rotation)
                update_flags->bits.rotation_change = 1;

        if (u->plane_info->format != u->surface->format)
                update_flags->bits.pixel_format_change = 1;

        if (u->plane_info->stereo_format != u->surface->stereo_format)
                update_flags->bits.stereo_format_change = 1;

        if (u->plane_info->per_pixel_alpha != u->surface->per_pixel_alpha)
                update_flags->bits.per_pixel_alpha_change = 1;

        if (u->plane_info->global_alpha_value != u->surface->global_alpha_value)
                update_flags->bits.global_alpha_change = 1;

        if (u->plane_info->dcc.enable != u->surface->dcc.enable
                        || u->plane_info->dcc.grph.independent_64b_blks != u->surface->dcc.grph.independent_64b_blks
                        || u->plane_info->dcc.grph.meta_pitch != u->surface->dcc.grph.meta_pitch)
                update_flags->bits.dcc_change = 1;

        if (resource_pixel_format_to_bpp(u->plane_info->format) !=
                        resource_pixel_format_to_bpp(u->surface->format))
                /* different bytes per element will require full bandwidth
                 * and DML calculation
                 */
                update_flags->bits.bpp_change = 1;

        if (memcmp(&u->plane_info->tiling_info, &u->surface->tiling_info,
                        sizeof(union dc_tiling_info)) != 0) {
                update_flags->bits.swizzle_change = 1;
                /* todo: below are HW dependent, we should add a hook to
                 * DCE/N resource and validated there.
                 */
                if (u->plane_info->tiling_info.gfx9.swizzle != DC_SW_LINEAR)
                        /* swizzled mode requires RQ to be setup properly,
                         * thus need to run DML to calculate RQ settings
                         */
                        update_flags->bits.bandwidth_change = 1;
        }

        if (update_flags->bits.rotation_change
                        || update_flags->bits.stereo_format_change
                        || update_flags->bits.pixel_format_change
                        || update_flags->bits.bpp_change
                        || update_flags->bits.bandwidth_change
                        || update_flags->bits.output_tf_change)
                return UPDATE_TYPE_FULL;

        return UPDATE_TYPE_MED;
}

static enum surface_update_type get_scaling_info_update_type(
                const struct dc_surface_update *u)
{
        union surface_update_flags *update_flags = &u->surface->update_flags;

        if (!u->scaling_info)
                return UPDATE_TYPE_FAST;

        if (u->scaling_info->clip_rect.width != u->surface->clip_rect.width
                        || u->scaling_info->clip_rect.height != u->surface->clip_rect.height
                        || u->scaling_info->dst_rect.width != u->surface->dst_rect.width
                        || u->scaling_info->dst_rect.height != u->surface->dst_rect.height) {
                update_flags->bits.scaling_change = 1;

                if ((u->scaling_info->dst_rect.width < u->surface->dst_rect.width
                        || u->scaling_info->dst_rect.height < u->surface->dst_rect.height)
                                && (u->scaling_info->dst_rect.width < u->surface->src_rect.width
                                        || u->scaling_info->dst_rect.height < u->surface->src_rect.height))
                        /* Making dst rect smaller requires a bandwidth change */
                        update_flags->bits.bandwidth_change = 1;
        }

        if (u->scaling_info->src_rect.width != u->surface->src_rect.width
                || u->scaling_info->src_rect.height != u->surface->src_rect.height) {

                update_flags->bits.scaling_change = 1;
                if (u->scaling_info->src_rect.width > u->surface->src_rect.width
                                && u->scaling_info->src_rect.height > u->surface->src_rect.height)
                        /* Making src rect bigger requires a bandwidth change */
                        update_flags->bits.clock_change = 1;
        }

        if (u->scaling_info->src_rect.x != u->surface->src_rect.x
                        || u->scaling_info->src_rect.y != u->surface->src_rect.y
                        || u->scaling_info->clip_rect.x != u->surface->clip_rect.x
                        || u->scaling_info->clip_rect.y != u->surface->clip_rect.y
                        || u->scaling_info->dst_rect.x != u->surface->dst_rect.x
                        || u->scaling_info->dst_rect.y != u->surface->dst_rect.y)
                update_flags->bits.position_change = 1;

        if (update_flags->bits.clock_change
                        || update_flags->bits.bandwidth_change)
                return UPDATE_TYPE_FULL;

        if (update_flags->bits.scaling_change
                        || update_flags->bits.position_change)
                return UPDATE_TYPE_MED;

        return UPDATE_TYPE_FAST;
}

static enum surface_update_type det_surface_update(const struct dc *dc,
                const struct dc_surface_update *u)
{
        const struct dc_state *context = dc->current_state;
        enum surface_update_type type;
        enum surface_update_type overall_type = UPDATE_TYPE_FAST;
        union surface_update_flags *update_flags = &u->surface->update_flags;

        update_flags->raw = 0; // Reset all flags

        if (!is_surface_in_context(context, u->surface)) {
                update_flags->bits.new_plane = 1;
                return UPDATE_TYPE_FULL;
        }

        type = get_plane_info_update_type(u);
        elevate_update_type(&overall_type, type);

        type = get_scaling_info_update_type(u);
        elevate_update_type(&overall_type, type);

        if (u->in_transfer_func)
                update_flags->bits.in_transfer_func_change = 1;

        if (u->input_csc_color_matrix)
                update_flags->bits.input_csc_change = 1;

        if (u->coeff_reduction_factor)
                update_flags->bits.coeff_reduction_change = 1;

        if (u->gamma) {
                enum surface_pixel_format format = SURFACE_PIXEL_FORMAT_GRPH_BEGIN;

                if (u->plane_info)
                        format = u->plane_info->format;
                else if (u->surface)
                        format = u->surface->format;

                if (dce_use_lut(format))
                        update_flags->bits.gamma_change = 1;
        }

        if (update_flags->bits.in_transfer_func_change) {
                type = UPDATE_TYPE_MED;
                elevate_update_type(&overall_type, type);
        }

        if (update_flags->bits.input_csc_change
                        || update_flags->bits.coeff_reduction_change
                        || update_flags->bits.gamma_change) {
                type = UPDATE_TYPE_FULL;
                elevate_update_type(&overall_type, type);
        }

        return overall_type;
}

static enum surface_update_type check_update_surfaces_for_stream(
                struct dc *dc,
                struct dc_surface_update *updates,
                int surface_count,
                struct dc_stream_update *stream_update,
                const struct dc_stream_status *stream_status)
{
        int i;
        enum surface_update_type overall_type = UPDATE_TYPE_FAST;

        if (stream_status == NULL || stream_status->plane_count != surface_count)
                return UPDATE_TYPE_FULL;

        /* some stream updates require passive update */
        if (stream_update) {
                if ((stream_update->src.height != 0) &&
                                (stream_update->src.width != 0))
                        return UPDATE_TYPE_FULL;

                if ((stream_update->dst.height != 0) &&
                                (stream_update->dst.width != 0))
                        return UPDATE_TYPE_FULL;

                if (stream_update->out_transfer_func)
                        return UPDATE_TYPE_FULL;

                if (stream_update->abm_level)
                        return UPDATE_TYPE_FULL;

                if (stream_update->dpms_off)
                        return UPDATE_TYPE_FULL;
        }

        for (i = 0 ; i < surface_count; i++) {
                enum surface_update_type type =
                                det_surface_update(dc, &updates[i]);

                if (type == UPDATE_TYPE_FULL)
                        return type;

                elevate_update_type(&overall_type, type);
        }

        return overall_type;
}

enum surface_update_type dc_check_update_surfaces_for_stream(
                struct dc *dc,
                struct dc_surface_update *updates,
                int surface_count,
                struct dc_stream_update *stream_update,
                const struct dc_stream_status *stream_status)
{
        int i;
        enum surface_update_type type;

        for (i = 0; i < surface_count; i++)
                updates[i].surface->update_flags.raw = 0;

        type = check_update_surfaces_for_stream(dc, updates, surface_count, stream_update, stream_status);
        if (type == UPDATE_TYPE_FULL)
                for (i = 0; i < surface_count; i++)
                        updates[i].surface->update_flags.raw = 0xFFFFFFFF;

        return type;
}

static struct dc_stream_status *stream_get_status(
        struct dc_state *ctx,
        struct dc_stream_state *stream)
{
        uint8_t i;

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

        return NULL;
}

static const enum surface_update_type update_surface_trace_level = UPDATE_TYPE_FULL;

static void notify_display_count_to_smu(
                struct dc *dc,
                struct dc_state *context)
{
        int i, display_count;
        struct pp_smu_funcs_rv *pp_smu = dc->res_pool->pp_smu;

        /*
         * if function pointer not set up, this message is
         * sent as part of pplib_apply_display_requirements.
         * So just return.
         */
        if (!pp_smu || !pp_smu->set_display_count)
                return;

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

                /* only notify active stream */
                if (stream->dpms_off)
                        continue;

                display_count++;
        }

        pp_smu->set_display_count(&pp_smu->pp_smu, display_count);
}

static void commit_planes_do_stream_update(struct dc *dc,
                struct dc_stream_state *stream,
                struct dc_stream_update *stream_update,
                enum surface_update_type update_type,
                struct dc_state *context)
{
        int j;

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

                if (!pipe_ctx->top_pipe &&
                        pipe_ctx->stream &&
                        pipe_ctx->stream == stream) {

                        /* Fast update*/
                        // VRR program can be done as part of FAST UPDATE
                        if (stream_update->adjust)
                                dc->hwss.set_drr(&pipe_ctx, 1,
                                        stream_update->adjust->v_total_min,
                                        stream_update->adjust->v_total_max);

                        if (stream_update->periodic_fn_vsync_delta &&
                                        pipe_ctx->stream_res.tg &&
                                        pipe_ctx->stream_res.tg->funcs->program_vline_interrupt)
                                pipe_ctx->stream_res.tg->funcs->program_vline_interrupt(
                                        pipe_ctx->stream_res.tg, &pipe_ctx->stream->timing,
                                        pipe_ctx->stream->periodic_fn_vsync_delta);

                        if ((stream_update->hdr_static_metadata && !stream->use_dynamic_meta) ||
                                        stream_update->vrr_infopacket ||
                                        stream_update->vsc_infopacket) {
                                resource_build_info_frame(pipe_ctx);
                                dc->hwss.update_info_frame(pipe_ctx);
                        }

                        if (stream_update->gamut_remap)
                                dc_stream_set_gamut_remap(dc, stream);

                        if (stream_update->output_csc_transform)
                                dc_stream_program_csc_matrix(dc, stream);

                        /* Full fe update*/
                        if (update_type == UPDATE_TYPE_FAST)
                                continue;

                        if (stream_update->dpms_off) {
                                if (*stream_update->dpms_off) {
                                        core_link_disable_stream(pipe_ctx, KEEP_ACQUIRED_RESOURCE);
                                        dc->hwss.pplib_apply_display_requirements(
                                                dc, dc->current_state);
                                        notify_display_count_to_smu(dc, dc->current_state);
                                } else {
                                        dc->hwss.pplib_apply_display_requirements(
                                                dc, dc->current_state);
                                        notify_display_count_to_smu(dc, dc->current_state);
                                        core_link_enable_stream(dc->current_state, pipe_ctx);
                                }
                        }



                        if (stream_update->abm_level && pipe_ctx->stream_res.abm) {
                                if (pipe_ctx->stream_res.tg->funcs->is_blanked) {
                                        // if otg funcs defined check if blanked before programming
                                        if (!pipe_ctx->stream_res.tg->funcs->is_blanked(pipe_ctx->stream_res.tg))
                                                pipe_ctx->stream_res.abm->funcs->set_abm_level(
                                                        pipe_ctx->stream_res.abm, stream->abm_level);
                                } else
                                        pipe_ctx->stream_res.abm->funcs->set_abm_level(
                                                pipe_ctx->stream_res.abm, stream->abm_level);
                        }
                }
        }
}

static void commit_planes_for_stream(struct dc *dc,
                struct dc_surface_update *srf_updates,
                int surface_count,
                struct dc_stream_state *stream,
                struct dc_stream_update *stream_update,
                enum surface_update_type update_type,
                struct dc_state *context)
{
        int i, j;
        struct pipe_ctx *top_pipe_to_program = NULL;

        if (update_type == UPDATE_TYPE_FULL) {
                dc->hwss.set_bandwidth(dc, context, false);
                context_clock_trace(dc, context);
        }

        // Stream updates
        if (stream_update)
                commit_planes_do_stream_update(dc, stream, stream_update, update_type, context);

        if (surface_count == 0) {
                /*
                 * In case of turning off screen, no need to program front end a second time.
                 * just return after program blank.
                 */
                dc->hwss.apply_ctx_for_surface(dc, stream, 0, context);
                return;
        }

        // Update Type FULL, Surface updates
        for (j = 0; j < dc->res_pool->pipe_count; j++) {
                struct pipe_ctx *pipe_ctx = &context->res_ctx.pipe_ctx[j];

                if (!pipe_ctx->top_pipe &&
                        pipe_ctx->stream &&
                        pipe_ctx->stream == stream) {
                        struct dc_stream_status *stream_status = NULL;

                        top_pipe_to_program = pipe_ctx;

                        if (!pipe_ctx->plane_state)
                                continue;

                        /* Full fe update*/
                        if (update_type == UPDATE_TYPE_FAST)
                                continue;

                        stream_status =
                                stream_get_status(context, pipe_ctx->stream);

                        dc->hwss.apply_ctx_for_surface(
                                        dc, pipe_ctx->stream, stream_status->plane_count, context);
                }
        }

        if (update_type == UPDATE_TYPE_FULL)
                context_timing_trace(dc, &context->res_ctx);

        // Update Type FAST, Surface updates
        if (update_type == UPDATE_TYPE_FAST) {
                /* Lock the top pipe while updating plane addrs, since freesync requires
                 *  plane addr update event triggers to be synchronized.
                 *  top_pipe_to_program is expected to never be NULL
                 */
                dc->hwss.pipe_control_lock(dc, top_pipe_to_program, true);

                /* Perform requested Updates */
                for (i = 0; i < surface_count; i++) {
                        struct dc_plane_state *plane_state = srf_updates[i].surface;

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

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

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

                                if (srf_updates[i].flip_addr)
                                        dc->hwss.update_plane_addr(dc, pipe_ctx);
                        }
                }

                dc->hwss.pipe_control_lock(dc, top_pipe_to_program, false);
        }
}

void dc_commit_updates_for_stream(struct dc *dc,
                struct dc_surface_update *srf_updates,
                int surface_count,
                struct dc_stream_state *stream,
                struct dc_stream_update *stream_update,
                struct dc_plane_state **plane_states,
                struct dc_state *state)
{
        const struct dc_stream_status *stream_status;
        enum surface_update_type update_type;
        struct dc_state *context;
        struct dc_context *dc_ctx = dc->ctx;
        int i, j;

        stream_status = dc_stream_get_status(stream);
        context = dc->current_state;

        update_type = dc_check_update_surfaces_for_stream(
                                dc, srf_updates, surface_count, stream_update, stream_status);

        if (update_type >= update_surface_trace_level)
                update_surface_trace(dc, srf_updates, surface_count);


        if (update_type >= UPDATE_TYPE_FULL) {

                /* initialize scratch memory for building context */
                context = dc_create_state();
                if (context == NULL) {
                        DC_ERROR("Failed to allocate new validate context!\n");
                        return;
                }

                dc_resource_state_copy_construct(state, context);
        }


        for (i = 0; i < surface_count; i++) {
                struct dc_plane_state *surface = srf_updates[i].surface;

                /* TODO: On flip we don't build the state, so it still has the
                 * old address. Which is why we are updating the address here
                 */
                if (srf_updates[i].flip_addr) {
                        surface->address = srf_updates[i].flip_addr->address;
                        surface->flip_immediate = srf_updates[i].flip_addr->flip_immediate;

                }

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

                                if (pipe_ctx->plane_state != surface)
                                        continue;

                                resource_build_scaling_params(pipe_ctx);
                        }
                }
        }

        commit_planes_for_stream(
                                dc,
                                srf_updates,
                                surface_count,
                                stream,
                                stream_update,
                                update_type,
                                context);
        /*update current_State*/
        if (dc->current_state != context) {

                struct dc_state *old = dc->current_state;

                dc->current_state = context;
                dc_release_state(old);

        }
        /*let's use current_state to update watermark etc*/
        if (update_type >= UPDATE_TYPE_FULL)
                dc_post_update_surfaces_to_stream(dc);

        return;

}

uint8_t dc_get_current_stream_count(struct dc *dc)
{
        return dc->current_state->stream_count;
}

struct dc_stream_state *dc_get_stream_at_index(struct dc *dc, uint8_t i)
{
        if (i < dc->current_state->stream_count)
                return dc->current_state->streams[i];
        return NULL;
}

enum dc_irq_source dc_interrupt_to_irq_source(
                struct dc *dc,
                uint32_t src_id,
                uint32_t ext_id)
{
        return dal_irq_service_to_irq_source(dc->res_pool->irqs, src_id, ext_id);
}

bool dc_interrupt_set(struct dc *dc, enum dc_irq_source src, bool enable)
{

        if (dc == NULL)
                return false;

        return dal_irq_service_set(dc->res_pool->irqs, src, enable);
}

void dc_interrupt_ack(struct dc *dc, enum dc_irq_source src)
{
        dal_irq_service_ack(dc->res_pool->irqs, src);
}

void dc_set_power_state(
        struct dc *dc,
        enum dc_acpi_cm_power_state power_state)
{
        struct kref refcount;

        switch (power_state) {
        case DC_ACPI_CM_POWER_STATE_D0:
                dc_resource_state_construct(dc, dc->current_state);

                dc->hwss.init_hw(dc);
                break;
        default:
                ASSERT(dc->current_state->stream_count == 0);
                /* Zero out the current context so that on resume we start with
                 * clean state, and dc hw programming optimizations will not
                 * cause any trouble.
                 */

                /* Preserve refcount */
                refcount = dc->current_state->refcount;
                dc_resource_state_destruct(dc->current_state);
                memset(dc->current_state, 0,
                                sizeof(*dc->current_state));

                dc->current_state->refcount = refcount;

                break;
        }

}

void dc_resume(struct dc *dc)
{

        uint32_t i;

        for (i = 0; i < dc->link_count; i++)
                core_link_resume(dc->links[i]);
}

bool dc_submit_i2c(
                struct dc *dc,
                uint32_t link_index,
                struct i2c_command *cmd)
{

        struct dc_link *link = dc->links[link_index];
        struct ddc_service *ddc = link->ddc;
        return dce_i2c_submit_command(
                dc->res_pool,
                ddc->ddc_pin,
                cmd);
}

static bool link_add_remote_sink_helper(struct dc_link *dc_link, struct dc_sink *sink)
{
        if (dc_link->sink_count >= MAX_SINKS_PER_LINK) {
                BREAK_TO_DEBUGGER();
                return false;
        }

        dc_sink_retain(sink);

        dc_link->remote_sinks[dc_link->sink_count] = sink;
        dc_link->sink_count++;

        return true;
}

struct dc_sink *dc_link_add_remote_sink(
                struct dc_link *link,
                const uint8_t *edid,
                int len,
                struct dc_sink_init_data *init_data)
{
        struct dc_sink *dc_sink;
        enum dc_edid_status edid_status;

        if (len > DC_MAX_EDID_BUFFER_SIZE) {
                dm_error("Max EDID buffer size breached!\n");
                return NULL;
        }

        if (!init_data) {
                BREAK_TO_DEBUGGER();
                return NULL;
        }

        if (!init_data->link) {
                BREAK_TO_DEBUGGER();
                return NULL;
        }

        dc_sink = dc_sink_create(init_data);

        if (!dc_sink)
                return NULL;

        memmove(dc_sink->dc_edid.raw_edid, edid, len);
        dc_sink->dc_edid.length = len;

        if (!link_add_remote_sink_helper(
                        link,
                        dc_sink))
                goto fail_add_sink;

        edid_status = dm_helpers_parse_edid_caps(
                        link->ctx,
                        &dc_sink->dc_edid,
                        &dc_sink->edid_caps);

        /*
         * Treat device as no EDID device if EDID
         * parsing fails
         */
        if (edid_status != EDID_OK) {
                dc_sink->dc_edid.length = 0;
                dm_error("Bad EDID, status%d!\n", edid_status);
        }

        return dc_sink;

fail_add_sink:
        dc_sink_release(dc_sink);
        return NULL;
}

void dc_link_remove_remote_sink(struct dc_link *link, struct dc_sink *sink)
{
        int i;

        if (!link->sink_count) {
                BREAK_TO_DEBUGGER();
                return;
        }

        for (i = 0; i < link->sink_count; i++) {
                if (link->remote_sinks[i] == sink) {
                        dc_sink_release(sink);
                        link->remote_sinks[i] = NULL;

                        /* shrink array to remove empty place */
                        while (i < link->sink_count - 1) {
                                link->remote_sinks[i] = link->remote_sinks[i+1];
                                i++;
                        }
                        link->remote_sinks[i] = NULL;
                        link->sink_count--;
                        return;
                }
        }
}

void get_clock_requirements_for_state(struct dc_state *state, struct AsicStateEx *info)
{
        info->displayClock                              = (unsigned int)state->bw.dcn.clk.dispclk_khz;
        info->engineClock                               = (unsigned int)state->bw.dcn.clk.dcfclk_khz;
        info->memoryClock                               = (unsigned int)state->bw.dcn.clk.dramclk_khz;
        info->maxSupportedDppClock              = (unsigned int)state->bw.dcn.clk.max_supported_dppclk_khz;
        info->dppClock                                  = (unsigned int)state->bw.dcn.clk.dppclk_khz;
        info->socClock                                  = (unsigned int)state->bw.dcn.clk.socclk_khz;
        info->dcfClockDeepSleep                 = (unsigned int)state->bw.dcn.clk.dcfclk_deep_sleep_khz;
        info->fClock                                    = (unsigned int)state->bw.dcn.clk.fclk_khz;
        info->phyClock                                  = (unsigned int)state->bw.dcn.clk.phyclk_khz;
}