/*
 * 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/delay.h>
#include <linux/slab.h>

#include "reg_helper.h"

#include "core_types.h"
#include "link_encoder.h"
#include "dce_link_encoder.h"
#include "stream_encoder.h"
#include "i2caux_interface.h"
#include "dc_bios_types.h"

#include "gpio_service_interface.h"

#include "dce/dce_11_0_d.h"
#include "dce/dce_11_0_sh_mask.h"
#include "dce/dce_11_0_enum.h"

#ifndef DMU_MEM_PWR_CNTL__DMCU_IRAM_MEM_PWR_STATE__SHIFT
#define DMU_MEM_PWR_CNTL__DMCU_IRAM_MEM_PWR_STATE__SHIFT 0xa
#endif

#ifndef DMU_MEM_PWR_CNTL__DMCU_IRAM_MEM_PWR_STATE_MASK
#define DMU_MEM_PWR_CNTL__DMCU_IRAM_MEM_PWR_STATE_MASK 0x00000400L
#endif

#ifndef HPD0_DC_HPD_CONTROL__DC_HPD_EN_MASK
#define HPD0_DC_HPD_CONTROL__DC_HPD_EN_MASK  0x10000000L
#endif

#ifndef HPD0_DC_HPD_CONTROL__DC_HPD_EN__SHIFT
#define HPD0_DC_HPD_CONTROL__DC_HPD_EN__SHIFT  0x1c
#endif

#define CTX \
        enc110->base.ctx
#define DC_LOGGER \
        enc110->base.ctx->logger

#define REG(reg)\
        (enc110->link_regs->reg)

#define AUX_REG(reg)\
        (enc110->aux_regs->reg)

#define HPD_REG(reg)\
        (enc110->hpd_regs->reg)

#define DEFAULT_AUX_MAX_DATA_SIZE 16
#define AUX_MAX_DEFER_WRITE_RETRY 20
/*
 * @brief
 * Trigger Source Select
 * ASIC-dependent, actual values for register programming
 */
#define DCE110_DIG_FE_SOURCE_SELECT_INVALID 0x0
#define DCE110_DIG_FE_SOURCE_SELECT_DIGA 0x1
#define DCE110_DIG_FE_SOURCE_SELECT_DIGB 0x2
#define DCE110_DIG_FE_SOURCE_SELECT_DIGC 0x4
#define DCE110_DIG_FE_SOURCE_SELECT_DIGD 0x08
#define DCE110_DIG_FE_SOURCE_SELECT_DIGE 0x10
#define DCE110_DIG_FE_SOURCE_SELECT_DIGF 0x20
#define DCE110_DIG_FE_SOURCE_SELECT_DIGG 0x40

enum {
        DP_MST_UPDATE_MAX_RETRY = 50
};

#define DIG_REG(reg)\
        (reg + enc110->offsets.dig)

#define DP_REG(reg)\
        (reg + enc110->offsets.dp)

static const struct link_encoder_funcs dce110_lnk_enc_funcs = {
        .validate_output_with_stream =
                dce110_link_encoder_validate_output_with_stream,
        .hw_init = dce110_link_encoder_hw_init,
        .setup = dce110_link_encoder_setup,
        .enable_tmds_output = dce110_link_encoder_enable_tmds_output,
        .enable_dp_output = dce110_link_encoder_enable_dp_output,
        .enable_dp_mst_output = dce110_link_encoder_enable_dp_mst_output,
        .enable_lvds_output = dce110_link_encoder_enable_lvds_output,
        .disable_output = dce110_link_encoder_disable_output,
        .dp_set_lane_settings = dce110_link_encoder_dp_set_lane_settings,
        .dp_set_phy_pattern = dce110_link_encoder_dp_set_phy_pattern,
        .update_mst_stream_allocation_table =
                dce110_link_encoder_update_mst_stream_allocation_table,
        .psr_program_dp_dphy_fast_training =
                        dce110_psr_program_dp_dphy_fast_training,
        .psr_program_secondary_packet = dce110_psr_program_secondary_packet,
        .connect_dig_be_to_fe = dce110_link_encoder_connect_dig_be_to_fe,
        .enable_hpd = dce110_link_encoder_enable_hpd,
        .disable_hpd = dce110_link_encoder_disable_hpd,
        .is_dig_enabled = dce110_is_dig_enabled,
        .destroy = dce110_link_encoder_destroy
};

static enum bp_result link_transmitter_control(
        struct dce110_link_encoder *enc110,
        struct bp_transmitter_control *cntl)
{
        enum bp_result result;
        struct dc_bios *bp = enc110->base.ctx->dc_bios;

        result = bp->funcs->transmitter_control(bp, cntl);

        return result;
}

static void enable_phy_bypass_mode(
        struct dce110_link_encoder *enc110,
        bool enable)
{
        /* This register resides in DP back end block;
         * transmitter is used for the offset */

        REG_UPDATE(DP_DPHY_CNTL, DPHY_BYPASS, enable);

}

static void disable_prbs_symbols(
        struct dce110_link_encoder *enc110,
        bool disable)
{
        /* This register resides in DP back end block;
         * transmitter is used for the offset */

        REG_UPDATE_4(DP_DPHY_CNTL,
                        DPHY_ATEST_SEL_LANE0, disable,
                        DPHY_ATEST_SEL_LANE1, disable,
                        DPHY_ATEST_SEL_LANE2, disable,
                        DPHY_ATEST_SEL_LANE3, disable);
}

static void disable_prbs_mode(
        struct dce110_link_encoder *enc110)
{
        REG_UPDATE(DP_DPHY_PRBS_CNTL, DPHY_PRBS_EN, 0);
}

static void program_pattern_symbols(
        struct dce110_link_encoder *enc110,
        uint16_t pattern_symbols[8])
{
        /* This register resides in DP back end block;
         * transmitter is used for the offset */

        REG_SET_3(DP_DPHY_SYM0, 0,
                        DPHY_SYM1, pattern_symbols[0],
                        DPHY_SYM2, pattern_symbols[1],
                        DPHY_SYM3, pattern_symbols[2]);

        /* This register resides in DP back end block;
         * transmitter is used for the offset */

        REG_SET_3(DP_DPHY_SYM1, 0,
                        DPHY_SYM4, pattern_symbols[3],
                        DPHY_SYM5, pattern_symbols[4],
                        DPHY_SYM6, pattern_symbols[5]);

        /* This register resides in DP back end block;
         * transmitter is used for the offset */

        REG_SET_2(DP_DPHY_SYM2, 0,
                        DPHY_SYM7, pattern_symbols[6],
                        DPHY_SYM8, pattern_symbols[7]);
}

static void set_dp_phy_pattern_d102(
        struct dce110_link_encoder *enc110)
{
        /* Disable PHY Bypass mode to setup the test pattern */
        enable_phy_bypass_mode(enc110, false);

        /* For 10-bit PRBS or debug symbols
         * please use the following sequence: */

        /* Enable debug symbols on the lanes */

        disable_prbs_symbols(enc110, true);

        /* Disable PRBS mode */
        disable_prbs_mode(enc110);

        /* Program debug symbols to be output */
        {
                uint16_t pattern_symbols[8] = {
                        0x2AA, 0x2AA, 0x2AA, 0x2AA,
                        0x2AA, 0x2AA, 0x2AA, 0x2AA
                };

                program_pattern_symbols(enc110, pattern_symbols);
        }

        /* Enable phy bypass mode to enable the test pattern */

        enable_phy_bypass_mode(enc110, true);
}

static void set_link_training_complete(
        struct dce110_link_encoder *enc110,
        bool complete)
{
        /* This register resides in DP back end block;
         * transmitter is used for the offset */

        REG_UPDATE(DP_LINK_CNTL, DP_LINK_TRAINING_COMPLETE, complete);

}

void dce110_link_encoder_set_dp_phy_pattern_training_pattern(
        struct link_encoder *enc,
        uint32_t index)
{
        struct dce110_link_encoder *enc110 = TO_DCE110_LINK_ENC(enc);
        /* Write Training Pattern */

        REG_WRITE(DP_DPHY_TRAINING_PATTERN_SEL, index);

        /* Set HW Register Training Complete to false */

        set_link_training_complete(enc110, false);

        /* Disable PHY Bypass mode to output Training Pattern */

        enable_phy_bypass_mode(enc110, false);

        /* Disable PRBS mode */
        disable_prbs_mode(enc110);
}

static void setup_panel_mode(
        struct dce110_link_encoder *enc110,
        enum dp_panel_mode panel_mode)
{
        uint32_t value;
        struct dc_context *ctx = enc110->base.ctx;

        /* if psp set panel mode, dal should be program it */
        if (ctx->dc->caps.psp_setup_panel_mode)
                return;

        ASSERT(REG(DP_DPHY_INTERNAL_CTRL));
        value = REG_READ(DP_DPHY_INTERNAL_CTRL);

        switch (panel_mode) {
        case DP_PANEL_MODE_EDP:
                value = 0x1;
                break;
        case DP_PANEL_MODE_SPECIAL:
                value = 0x11;
                break;
        default:
                value = 0x0;
                break;
        }

        REG_WRITE(DP_DPHY_INTERNAL_CTRL, value);
}

static void set_dp_phy_pattern_symbol_error(
        struct dce110_link_encoder *enc110)
{
        /* Disable PHY Bypass mode to setup the test pattern */
        enable_phy_bypass_mode(enc110, false);

        /* program correct panel mode*/
        setup_panel_mode(enc110, DP_PANEL_MODE_DEFAULT);

        /* A PRBS23 pattern is used for most DP electrical measurements. */

        /* Enable PRBS symbols on the lanes */
        disable_prbs_symbols(enc110, false);

        /* For PRBS23 Set bit DPHY_PRBS_SEL=1 and Set bit DPHY_PRBS_EN=1 */
        REG_UPDATE_2(DP_DPHY_PRBS_CNTL,
                        DPHY_PRBS_SEL, 1,
                        DPHY_PRBS_EN, 1);

        /* Enable phy bypass mode to enable the test pattern */
        enable_phy_bypass_mode(enc110, true);
}

static void set_dp_phy_pattern_prbs7(
        struct dce110_link_encoder *enc110)
{
        /* Disable PHY Bypass mode to setup the test pattern */
        enable_phy_bypass_mode(enc110, false);

        /* A PRBS7 pattern is used for most DP electrical measurements. */

        /* Enable PRBS symbols on the lanes */
        disable_prbs_symbols(enc110, false);

        /* For PRBS7 Set bit DPHY_PRBS_SEL=0 and Set bit DPHY_PRBS_EN=1 */
        REG_UPDATE_2(DP_DPHY_PRBS_CNTL,
                        DPHY_PRBS_SEL, 0,
                        DPHY_PRBS_EN, 1);

        /* Enable phy bypass mode to enable the test pattern */
        enable_phy_bypass_mode(enc110, true);
}

static void set_dp_phy_pattern_80bit_custom(
        struct dce110_link_encoder *enc110,
        const uint8_t *pattern)
{
        /* Disable PHY Bypass mode to setup the test pattern */
        enable_phy_bypass_mode(enc110, false);

        /* Enable debug symbols on the lanes */

        disable_prbs_symbols(enc110, true);

        /* Enable PHY bypass mode to enable the test pattern */
        /* TODO is it really needed ? */

        enable_phy_bypass_mode(enc110, true);

        /* Program 80 bit custom pattern */
        {
                uint16_t pattern_symbols[8];

                pattern_symbols[0] =
                        ((pattern[1] & 0x03) << 8) | pattern[0];
                pattern_symbols[1] =
                        ((pattern[2] & 0x0f) << 6) | ((pattern[1] >> 2) & 0x3f);
                pattern_symbols[2] =
                        ((pattern[3] & 0x3f) << 4) | ((pattern[2] >> 4) & 0x0f);
                pattern_symbols[3] =
                        (pattern[4] << 2) | ((pattern[3] >> 6) & 0x03);
                pattern_symbols[4] =
                        ((pattern[6] & 0x03) << 8) | pattern[5];
                pattern_symbols[5] =
                        ((pattern[7] & 0x0f) << 6) | ((pattern[6] >> 2) & 0x3f);
                pattern_symbols[6] =
                        ((pattern[8] & 0x3f) << 4) | ((pattern[7] >> 4) & 0x0f);
                pattern_symbols[7] =
                        (pattern[9] << 2) | ((pattern[8] >> 6) & 0x03);

                program_pattern_symbols(enc110, pattern_symbols);
        }

        /* Enable phy bypass mode to enable the test pattern */

        enable_phy_bypass_mode(enc110, true);
}

static void set_dp_phy_pattern_hbr2_compliance_cp2520_2(
        struct dce110_link_encoder *enc110,
        unsigned int cp2520_pattern)
{

        /* previously there is a register DP_HBR2_EYE_PATTERN
         * that is enabled to get the pattern.
         * But it does not work with the latest spec change,
         * so we are programming the following registers manually.
         *
         * The following settings have been confirmed
         * by Nick Chorney and Sandra Liu */

        /* Disable PHY Bypass mode to setup the test pattern */

        enable_phy_bypass_mode(enc110, false);

        /* Setup DIG encoder in DP SST mode */
        enc110->base.funcs->setup(&enc110->base, SIGNAL_TYPE_DISPLAY_PORT);

        /* ensure normal panel mode. */
        setup_panel_mode(enc110, DP_PANEL_MODE_DEFAULT);

        /* no vbid after BS (SR)
         * DP_LINK_FRAMING_CNTL changed history Sandra Liu
         * 11000260 / 11000104 / 110000FC */
        REG_UPDATE_3(DP_LINK_FRAMING_CNTL,
                        DP_IDLE_BS_INTERVAL, 0xFC,
                        DP_VBID_DISABLE, 1,
                        DP_VID_ENHANCED_FRAME_MODE, 1);

        /* swap every BS with SR */
        REG_UPDATE(DP_DPHY_SCRAM_CNTL, DPHY_SCRAMBLER_BS_COUNT, 0);

        /* select cp2520 patterns */
        if (REG(DP_DPHY_HBR2_PATTERN_CONTROL))
                REG_UPDATE(DP_DPHY_HBR2_PATTERN_CONTROL,
                                DP_DPHY_HBR2_PATTERN_CONTROL, cp2520_pattern);
        else
                /* pre-DCE11 can only generate CP2520 pattern 2 */
                ASSERT(cp2520_pattern == 2);

        /* set link training complete */
        set_link_training_complete(enc110, true);

        /* disable video stream */
        REG_UPDATE(DP_VID_STREAM_CNTL, DP_VID_STREAM_ENABLE, 0);

        /* Disable PHY Bypass mode to setup the test pattern */
        enable_phy_bypass_mode(enc110, false);
}

static void set_dp_phy_pattern_passthrough_mode(
        struct dce110_link_encoder *enc110,
        enum dp_panel_mode panel_mode)
{
        /* program correct panel mode */
        setup_panel_mode(enc110, panel_mode);

        /* restore LINK_FRAMING_CNTL and DPHY_SCRAMBLER_BS_COUNT
         * in case we were doing HBR2 compliance pattern before
         */
        REG_UPDATE_3(DP_LINK_FRAMING_CNTL,
                        DP_IDLE_BS_INTERVAL, 0x2000,
                        DP_VBID_DISABLE, 0,
                        DP_VID_ENHANCED_FRAME_MODE, 1);

        REG_UPDATE(DP_DPHY_SCRAM_CNTL, DPHY_SCRAMBLER_BS_COUNT, 0x1FF);

        /* set link training complete */
        set_link_training_complete(enc110, true);

        /* Disable PHY Bypass mode to setup the test pattern */
        enable_phy_bypass_mode(enc110, false);

        /* Disable PRBS mode */
        disable_prbs_mode(enc110);
}

/* return value is bit-vector */
static uint8_t get_frontend_source(
        enum engine_id engine)
{
        switch (engine) {
        case ENGINE_ID_DIGA:
                return DCE110_DIG_FE_SOURCE_SELECT_DIGA;
        case ENGINE_ID_DIGB:
                return DCE110_DIG_FE_SOURCE_SELECT_DIGB;
        case ENGINE_ID_DIGC:
                return DCE110_DIG_FE_SOURCE_SELECT_DIGC;
        case ENGINE_ID_DIGD:
                return DCE110_DIG_FE_SOURCE_SELECT_DIGD;
        case ENGINE_ID_DIGE:
                return DCE110_DIG_FE_SOURCE_SELECT_DIGE;
        case ENGINE_ID_DIGF:
                return DCE110_DIG_FE_SOURCE_SELECT_DIGF;
        case ENGINE_ID_DIGG:
                return DCE110_DIG_FE_SOURCE_SELECT_DIGG;
        default:
                ASSERT_CRITICAL(false);
                return DCE110_DIG_FE_SOURCE_SELECT_INVALID;
        }
}

static void configure_encoder(
        struct dce110_link_encoder *enc110,
        const struct dc_link_settings *link_settings)
{
        /* set number of lanes */

        REG_SET(DP_CONFIG, 0,
                        DP_UDI_LANES, link_settings->lane_count - LANE_COUNT_ONE);

        /* setup scrambler */
        REG_UPDATE(DP_DPHY_SCRAM_CNTL, DPHY_SCRAMBLER_ADVANCE, 1);
}

static void aux_initialize(
        struct dce110_link_encoder *enc110)
{
        struct dc_context *ctx = enc110->base.ctx;
        enum hpd_source_id hpd_source = enc110->base.hpd_source;
        uint32_t addr = AUX_REG(AUX_CONTROL);
        uint32_t value = dm_read_reg(ctx, addr);

        set_reg_field_value(value, hpd_source, AUX_CONTROL, AUX_HPD_SEL);
        set_reg_field_value(value, 0, AUX_CONTROL, AUX_LS_READ_EN);
        dm_write_reg(ctx, addr, value);

        addr = AUX_REG(AUX_DPHY_RX_CONTROL0);
        value = dm_read_reg(ctx, addr);

        /* 1/4 window (the maximum allowed) */
        set_reg_field_value(value, 1,
                        AUX_DPHY_RX_CONTROL0, AUX_RX_RECEIVE_WINDOW);
        dm_write_reg(ctx, addr, value);

}

void dce110_psr_program_dp_dphy_fast_training(struct link_encoder *enc,
                        bool exit_link_training_required)
{
        struct dce110_link_encoder *enc110 = TO_DCE110_LINK_ENC(enc);

        if (exit_link_training_required)
                REG_UPDATE(DP_DPHY_FAST_TRAINING,
                                DPHY_RX_FAST_TRAINING_CAPABLE, 1);
        else {
                REG_UPDATE(DP_DPHY_FAST_TRAINING,
                                DPHY_RX_FAST_TRAINING_CAPABLE, 0);
                /*In DCE 11, we are able to pre-program a Force SR register
                 * to be able to trigger SR symbol after 5 idle patterns
                 * transmitted. Upon PSR Exit, DMCU can trigger
                 * DPHY_LOAD_BS_COUNT_START = 1. Upon writing 1 to
                 * DPHY_LOAD_BS_COUNT_START and the internal counter
                 * reaches DPHY_LOAD_BS_COUNT, the next BS symbol will be
                 * replaced by SR symbol once.
                 */

                REG_UPDATE(DP_DPHY_BS_SR_SWAP_CNTL, DPHY_LOAD_BS_COUNT, 0x5);
        }
}

void dce110_psr_program_secondary_packet(struct link_encoder *enc,
                        unsigned int sdp_transmit_line_num_deadline)
{
        struct dce110_link_encoder *enc110 = TO_DCE110_LINK_ENC(enc);

        REG_UPDATE_2(DP_SEC_CNTL1,
                DP_SEC_GSP0_LINE_NUM, sdp_transmit_line_num_deadline,
                DP_SEC_GSP0_PRIORITY, 1);
}

bool dce110_is_dig_enabled(struct link_encoder *enc)
{
        struct dce110_link_encoder *enc110 = TO_DCE110_LINK_ENC(enc);
        uint32_t value;

        REG_GET(DIG_BE_EN_CNTL, DIG_ENABLE, &value);
        return value;
}

static void link_encoder_disable(struct dce110_link_encoder *enc110)
{
        /* reset training pattern */
        REG_SET(DP_DPHY_TRAINING_PATTERN_SEL, 0,
                        DPHY_TRAINING_PATTERN_SEL, 0);

        /* reset training complete */
        REG_UPDATE(DP_LINK_CNTL, DP_LINK_TRAINING_COMPLETE, 0);

        /* reset panel mode */
        setup_panel_mode(enc110, DP_PANEL_MODE_DEFAULT);
}

static void hpd_initialize(
        struct dce110_link_encoder *enc110)
{
        /* Associate HPD with DIG_BE */
        enum hpd_source_id hpd_source = enc110->base.hpd_source;

        REG_UPDATE(DIG_BE_CNTL, DIG_HPD_SELECT, hpd_source);
}

bool dce110_link_encoder_validate_dvi_output(
        const struct dce110_link_encoder *enc110,
        enum signal_type connector_signal,
        enum signal_type signal,
        const struct dc_crtc_timing *crtc_timing)
{
        uint32_t max_pixel_clock = TMDS_MAX_PIXEL_CLOCK;

        if (signal == SIGNAL_TYPE_DVI_DUAL_LINK)
                max_pixel_clock *= 2;

        /* This handles the case of HDMI downgrade to DVI we don't want to
         * we don't want to cap the pixel clock if the DDI is not DVI.
         */
        if (connector_signal != SIGNAL_TYPE_DVI_DUAL_LINK &&
                        connector_signal != SIGNAL_TYPE_DVI_SINGLE_LINK)
                max_pixel_clock = enc110->base.features.max_hdmi_pixel_clock;

        /* DVI only support RGB pixel encoding */
        if (crtc_timing->pixel_encoding != PIXEL_ENCODING_RGB)
                return false;

        /*connect DVI via adpater's HDMI connector*/
        if ((connector_signal == SIGNAL_TYPE_DVI_SINGLE_LINK ||
                connector_signal == SIGNAL_TYPE_HDMI_TYPE_A) &&
                signal != SIGNAL_TYPE_HDMI_TYPE_A &&
                crtc_timing->pix_clk_100hz > (TMDS_MAX_PIXEL_CLOCK * 10))
                return false;
        if (crtc_timing->pix_clk_100hz < (TMDS_MIN_PIXEL_CLOCK * 10))
                return false;

        if (crtc_timing->pix_clk_100hz > (max_pixel_clock * 10))
                return false;

        /* DVI supports 6/8bpp single-link and 10/16bpp dual-link */
        switch (crtc_timing->display_color_depth) {
        case COLOR_DEPTH_666:
        case COLOR_DEPTH_888:
        break;
        case COLOR_DEPTH_101010:
        case COLOR_DEPTH_161616:
                if (signal != SIGNAL_TYPE_DVI_DUAL_LINK)
                        return false;
        break;
        default:
                return false;
        }

        return true;
}

static bool dce110_link_encoder_validate_hdmi_output(
        const struct dce110_link_encoder *enc110,
        const struct dc_crtc_timing *crtc_timing,
        int adjusted_pix_clk_khz)
{
        enum dc_color_depth max_deep_color =
                        enc110->base.features.max_hdmi_deep_color;

        if (max_deep_color < crtc_timing->display_color_depth)
                return false;

        if (crtc_timing->display_color_depth < COLOR_DEPTH_888)
                return false;
        if (adjusted_pix_clk_khz < TMDS_MIN_PIXEL_CLOCK)
                return false;

        if ((adjusted_pix_clk_khz == 0) ||
                (adjusted_pix_clk_khz > enc110->base.features.max_hdmi_pixel_clock))
                return false;

        /* DCE11 HW does not support 420 */
        if (!enc110->base.features.hdmi_ycbcr420_supported &&
                        crtc_timing->pixel_encoding == PIXEL_ENCODING_YCBCR420)
                return false;

        if (!enc110->base.features.flags.bits.HDMI_6GB_EN &&
                adjusted_pix_clk_khz >= 300000)
                return false;
        if (enc110->base.ctx->dc->debug.hdmi20_disable &&
                crtc_timing->pixel_encoding == PIXEL_ENCODING_YCBCR420)
                return false;
        return true;
}

bool dce110_link_encoder_validate_dp_output(
        const struct dce110_link_encoder *enc110,
        const struct dc_crtc_timing *crtc_timing)
{
        if (crtc_timing->pixel_encoding == PIXEL_ENCODING_YCBCR420)
                return false;

        return true;
}

void dce110_link_encoder_construct(
        struct dce110_link_encoder *enc110,
        const struct encoder_init_data *init_data,
        const struct encoder_feature_support *enc_features,
        const struct dce110_link_enc_registers *link_regs,
        const struct dce110_link_enc_aux_registers *aux_regs,
        const struct dce110_link_enc_hpd_registers *hpd_regs)
{
        struct bp_encoder_cap_info bp_cap_info = {0};
        const struct dc_vbios_funcs *bp_funcs = init_data->ctx->dc_bios->funcs;
        enum bp_result result = BP_RESULT_OK;

        enc110->base.funcs = &dce110_lnk_enc_funcs;
        enc110->base.ctx = init_data->ctx;
        enc110->base.id = init_data->encoder;

        enc110->base.hpd_source = init_data->hpd_source;
        enc110->base.connector = init_data->connector;

        enc110->base.preferred_engine = ENGINE_ID_UNKNOWN;

        enc110->base.features = *enc_features;

        enc110->base.transmitter = init_data->transmitter;

        /* set the flag to indicate whether driver poll the I2C data pin
         * while doing the DP sink detect
         */

/*      if (dal_adapter_service_is_feature_supported(as,
                FEATURE_DP_SINK_DETECT_POLL_DATA_PIN))
                enc110->base.features.flags.bits.
                        DP_SINK_DETECT_POLL_DATA_PIN = true;*/

        enc110->base.output_signals =
                SIGNAL_TYPE_DVI_SINGLE_LINK |
                SIGNAL_TYPE_DVI_DUAL_LINK |
                SIGNAL_TYPE_LVDS |
                SIGNAL_TYPE_DISPLAY_PORT |
                SIGNAL_TYPE_DISPLAY_PORT_MST |
                SIGNAL_TYPE_EDP |
                SIGNAL_TYPE_HDMI_TYPE_A;

        /* For DCE 8.0 and 8.1, by design, UNIPHY is hardwired to DIG_BE.
         * SW always assign DIG_FE 1:1 mapped to DIG_FE for non-MST UNIPHY.
         * SW assign DIG_FE to non-MST UNIPHY first and MST last. So prefer
         * DIG is per UNIPHY and used by SST DP, eDP, HDMI, DVI and LVDS.
         * Prefer DIG assignment is decided by board design.
         * For DCE 8.0, there are only max 6 UNIPHYs, we assume board design
         * and VBIOS will filter out 7 UNIPHY for DCE 8.0.
         * By this, adding DIGG should not hurt DCE 8.0.
         * This will let DCE 8.1 share DCE 8.0 as much as possible
         */

        enc110->link_regs = link_regs;
        enc110->aux_regs = aux_regs;
        enc110->hpd_regs = hpd_regs;

        switch (enc110->base.transmitter) {
        case TRANSMITTER_UNIPHY_A:
                enc110->base.preferred_engine = ENGINE_ID_DIGA;
        break;
        case TRANSMITTER_UNIPHY_B:
                enc110->base.preferred_engine = ENGINE_ID_DIGB;
        break;
        case TRANSMITTER_UNIPHY_C:
                enc110->base.preferred_engine = ENGINE_ID_DIGC;
        break;
        case TRANSMITTER_UNIPHY_D:
                enc110->base.preferred_engine = ENGINE_ID_DIGD;
        break;
        case TRANSMITTER_UNIPHY_E:
                enc110->base.preferred_engine = ENGINE_ID_DIGE;
        break;
        case TRANSMITTER_UNIPHY_F:
                enc110->base.preferred_engine = ENGINE_ID_DIGF;
        break;
        case TRANSMITTER_UNIPHY_G:
                enc110->base.preferred_engine = ENGINE_ID_DIGG;
        break;
        default:
                ASSERT_CRITICAL(false);
                enc110->base.preferred_engine = ENGINE_ID_UNKNOWN;
        }

        /* default to one to mirror Windows behavior */
        enc110->base.features.flags.bits.HDMI_6GB_EN = 1;

        result = bp_funcs->get_encoder_cap_info(enc110->base.ctx->dc_bios,
                                                enc110->base.id, &bp_cap_info);

        /* Override features with DCE-specific values */
        if (BP_RESULT_OK == result) {
                enc110->base.features.flags.bits.IS_HBR2_CAPABLE =
                                bp_cap_info.DP_HBR2_EN;
                enc110->base.features.flags.bits.IS_HBR3_CAPABLE =
                                bp_cap_info.DP_HBR3_EN;
                enc110->base.features.flags.bits.HDMI_6GB_EN = bp_cap_info.HDMI_6GB_EN;
        } else {
                DC_LOG_WARNING("%s: Failed to get encoder_cap_info from VBIOS with error code %d!\n",
                                __func__,
                                result);
        }
        if (enc110->base.ctx->dc->debug.hdmi20_disable) {
                enc110->base.features.flags.bits.HDMI_6GB_EN = 0;
        }
}

bool dce110_link_encoder_validate_output_with_stream(
        struct link_encoder *enc,
        const struct dc_stream_state *stream)
{
        struct dce110_link_encoder *enc110 = TO_DCE110_LINK_ENC(enc);
        bool is_valid;

        switch (stream->signal) {
        case SIGNAL_TYPE_DVI_SINGLE_LINK:
        case SIGNAL_TYPE_DVI_DUAL_LINK:
                is_valid = dce110_link_encoder_validate_dvi_output(
                        enc110,
                        stream->link->connector_signal,
                        stream->signal,
                        &stream->timing);
        break;
        case SIGNAL_TYPE_HDMI_TYPE_A:
                is_valid = dce110_link_encoder_validate_hdmi_output(
                                enc110,
                                &stream->timing,
                                stream->phy_pix_clk);
        break;
        case SIGNAL_TYPE_DISPLAY_PORT:
        case SIGNAL_TYPE_DISPLAY_PORT_MST:
                is_valid = dce110_link_encoder_validate_dp_output(
                                        enc110, &stream->timing);
        break;
        case SIGNAL_TYPE_EDP:
        case SIGNAL_TYPE_LVDS:
                is_valid =
                        (stream->timing.
                                pixel_encoding == PIXEL_ENCODING_RGB) ? true : false;
        break;
        case SIGNAL_TYPE_VIRTUAL:
                is_valid = true;
                break;
        default:
                is_valid = false;
        break;
        }

        return is_valid;
}

void dce110_link_encoder_hw_init(
        struct link_encoder *enc)
{
        struct dce110_link_encoder *enc110 = TO_DCE110_LINK_ENC(enc);
        struct bp_transmitter_control cntl = { 0 };
        enum bp_result result;

        cntl.action = TRANSMITTER_CONTROL_INIT;
        cntl.engine_id = ENGINE_ID_UNKNOWN;
        cntl.transmitter = enc110->base.transmitter;
        cntl.connector_obj_id = enc110->base.connector;
        cntl.lanes_number = LANE_COUNT_FOUR;
        cntl.coherent = false;
        cntl.hpd_sel = enc110->base.hpd_source;

        if (enc110->base.connector.id == CONNECTOR_ID_EDP)
                cntl.signal = SIGNAL_TYPE_EDP;

        result = link_transmitter_control(enc110, &cntl);

        if (result != BP_RESULT_OK) {
                DC_LOG_ERROR("%s: Failed to execute VBIOS command table!\n",
                        __func__);
                BREAK_TO_DEBUGGER();
                return;
        }

        if (enc110->base.connector.id == CONNECTOR_ID_LVDS) {
                cntl.action = TRANSMITTER_CONTROL_BACKLIGHT_BRIGHTNESS;

                result = link_transmitter_control(enc110, &cntl);

                ASSERT(result == BP_RESULT_OK);

        }
        aux_initialize(enc110);

        /* reinitialize HPD.
         * hpd_initialize() will pass DIG_FE id to HW context.
         * All other routine within HW context will use fe_engine_offset
         * as DIG_FE id even caller pass DIG_FE id.
         * So this routine must be called first. */
        hpd_initialize(enc110);
}

void dce110_link_encoder_destroy(struct link_encoder **enc)
{
        kfree(TO_DCE110_LINK_ENC(*enc));
        *enc = NULL;
}

void dce110_link_encoder_setup(
        struct link_encoder *enc,
        enum signal_type signal)
{
        struct dce110_link_encoder *enc110 = TO_DCE110_LINK_ENC(enc);

        switch (signal) {
        case SIGNAL_TYPE_EDP:
        case SIGNAL_TYPE_DISPLAY_PORT:
                /* DP SST */
                REG_UPDATE(DIG_BE_CNTL, DIG_MODE, 0);
                break;
        case SIGNAL_TYPE_LVDS:
                /* LVDS */
                REG_UPDATE(DIG_BE_CNTL, DIG_MODE, 1);
                break;
        case SIGNAL_TYPE_DVI_SINGLE_LINK:
        case SIGNAL_TYPE_DVI_DUAL_LINK:
                /* TMDS-DVI */
                REG_UPDATE(DIG_BE_CNTL, DIG_MODE, 2);
                break;
        case SIGNAL_TYPE_HDMI_TYPE_A:
                /* TMDS-HDMI */
                REG_UPDATE(DIG_BE_CNTL, DIG_MODE, 3);
                break;
        case SIGNAL_TYPE_DISPLAY_PORT_MST:
                /* DP MST */
                REG_UPDATE(DIG_BE_CNTL, DIG_MODE, 5);
                break;
        default:
                ASSERT_CRITICAL(false);
                /* invalid mode ! */
                break;
        }

}

/* TODO: still need depth or just pass in adjusted pixel clock? */
void dce110_link_encoder_enable_tmds_output(
        struct link_encoder *enc,
        enum clock_source_id clock_source,
        enum dc_color_depth color_depth,
        enum signal_type signal,
        uint32_t pixel_clock)
{
        struct dce110_link_encoder *enc110 = TO_DCE110_LINK_ENC(enc);
        struct bp_transmitter_control cntl = { 0 };
        enum bp_result result;

        /* Enable the PHY */
        cntl.connector_obj_id = enc110->base.connector;
        cntl.action = TRANSMITTER_CONTROL_ENABLE;
        cntl.engine_id = enc->preferred_engine;
        cntl.transmitter = enc110->base.transmitter;
        cntl.pll_id = clock_source;
        cntl.signal = signal;
        if (cntl.signal == SIGNAL_TYPE_DVI_DUAL_LINK)
                cntl.lanes_number = 8;
        else
                cntl.lanes_number = 4;

        cntl.hpd_sel = enc110->base.hpd_source;

        cntl.pixel_clock = pixel_clock;
        cntl.color_depth = color_depth;

        result = link_transmitter_control(enc110, &cntl);

        if (result != BP_RESULT_OK) {
                DC_LOG_ERROR("%s: Failed to execute VBIOS command table!\n",
                        __func__);
                BREAK_TO_DEBUGGER();
        }
}

/* TODO: still need depth or just pass in adjusted pixel clock? */
void dce110_link_encoder_enable_lvds_output(
        struct link_encoder *enc,
        enum clock_source_id clock_source,
        uint32_t pixel_clock)
{
        struct dce110_link_encoder *enc110 = TO_DCE110_LINK_ENC(enc);
        struct bp_transmitter_control cntl = { 0 };
        enum bp_result result;

        /* Enable the PHY */
        cntl.connector_obj_id = enc110->base.connector;
        cntl.action = TRANSMITTER_CONTROL_ENABLE;
        cntl.engine_id = enc->preferred_engine;
        cntl.transmitter = enc110->base.transmitter;
        cntl.pll_id = clock_source;
        cntl.signal = SIGNAL_TYPE_LVDS;
        cntl.lanes_number = 4;

        cntl.hpd_sel = enc110->base.hpd_source;

        cntl.pixel_clock = pixel_clock;

        result = link_transmitter_control(enc110, &cntl);

        if (result != BP_RESULT_OK) {
                DC_LOG_ERROR("%s: Failed to execute VBIOS command table!\n",
                        __func__);
                BREAK_TO_DEBUGGER();
        }
}

/* enables DP PHY output */
void dce110_link_encoder_enable_dp_output(
        struct link_encoder *enc,
        const struct dc_link_settings *link_settings,
        enum clock_source_id clock_source)
{
        struct dce110_link_encoder *enc110 = TO_DCE110_LINK_ENC(enc);
        struct bp_transmitter_control cntl = { 0 };
        enum bp_result result;

        /* Enable the PHY */

        /* number_of_lanes is used for pixel clock adjust,
         * but it's not passed to asic_control.
         * We need to set number of lanes manually.
         */
        configure_encoder(enc110, link_settings);

        cntl.connector_obj_id = enc110->base.connector;
        cntl.action = TRANSMITTER_CONTROL_ENABLE;
        cntl.engine_id = enc->preferred_engine;
        cntl.transmitter = enc110->base.transmitter;
        cntl.pll_id = clock_source;
        cntl.signal = SIGNAL_TYPE_DISPLAY_PORT;
        cntl.lanes_number = link_settings->lane_count;
        cntl.hpd_sel = enc110->base.hpd_source;
        cntl.pixel_clock = link_settings->link_rate
                                                * LINK_RATE_REF_FREQ_IN_KHZ;
        /* TODO: check if undefined works */
        cntl.color_depth = COLOR_DEPTH_UNDEFINED;

        result = link_transmitter_control(enc110, &cntl);

        if (result != BP_RESULT_OK) {
                DC_LOG_ERROR("%s: Failed to execute VBIOS command table!\n",
                        __func__);
                BREAK_TO_DEBUGGER();
        }
}

/* enables DP PHY output in MST mode */
void dce110_link_encoder_enable_dp_mst_output(
        struct link_encoder *enc,
        const struct dc_link_settings *link_settings,
        enum clock_source_id clock_source)
{
        struct dce110_link_encoder *enc110 = TO_DCE110_LINK_ENC(enc);
        struct bp_transmitter_control cntl = { 0 };
        enum bp_result result;

        /* Enable the PHY */

        /* number_of_lanes is used for pixel clock adjust,
         * but it's not passed to asic_control.
         * We need to set number of lanes manually.
         */
        configure_encoder(enc110, link_settings);

        cntl.action = TRANSMITTER_CONTROL_ENABLE;
        cntl.engine_id = ENGINE_ID_UNKNOWN;
        cntl.transmitter = enc110->base.transmitter;
        cntl.pll_id = clock_source;
        cntl.signal = SIGNAL_TYPE_DISPLAY_PORT_MST;
        cntl.lanes_number = link_settings->lane_count;
        cntl.hpd_sel = enc110->base.hpd_source;
        cntl.pixel_clock = link_settings->link_rate
                                                * LINK_RATE_REF_FREQ_IN_KHZ;
        /* TODO: check if undefined works */
        cntl.color_depth = COLOR_DEPTH_UNDEFINED;

        result = link_transmitter_control(enc110, &cntl);

        if (result != BP_RESULT_OK) {
                DC_LOG_ERROR("%s: Failed to execute VBIOS command table!\n",
                        __func__);
                BREAK_TO_DEBUGGER();
        }
}
/*
 * @brief
 * Disable transmitter and its encoder
 */
void dce110_link_encoder_disable_output(
        struct link_encoder *enc,
        enum signal_type signal)
{
        struct dce110_link_encoder *enc110 = TO_DCE110_LINK_ENC(enc);
        struct bp_transmitter_control cntl = { 0 };
        enum bp_result result;

        if (!dce110_is_dig_enabled(enc)) {
                /* OF_SKIP_POWER_DOWN_INACTIVE_ENCODER */
                return;
        }
        /* Power-down RX and disable GPU PHY should be paired.
         * Disabling PHY without powering down RX may cause
         * symbol lock loss, on which we will get DP Sink interrupt. */

        /* There is a case for the DP active dongles
         * where we want to disable the PHY but keep RX powered,
         * for those we need to ignore DP Sink interrupt
         * by checking lane count that has been set
         * on the last do_enable_output(). */

        /* disable transmitter */
        cntl.action = TRANSMITTER_CONTROL_DISABLE;
        cntl.transmitter = enc110->base.transmitter;
        cntl.hpd_sel = enc110->base.hpd_source;
        cntl.signal = signal;
        cntl.connector_obj_id = enc110->base.connector;

        result = link_transmitter_control(enc110, &cntl);

        if (result != BP_RESULT_OK) {
                DC_LOG_ERROR("%s: Failed to execute VBIOS command table!\n",
                        __func__);
                BREAK_TO_DEBUGGER();
                return;
        }

        /* disable encoder */
        if (dc_is_dp_signal(signal))
                link_encoder_disable(enc110);
}

void dce110_link_encoder_dp_set_lane_settings(
        struct link_encoder *enc,
        const struct link_training_settings *link_settings)
{
        struct dce110_link_encoder *enc110 = TO_DCE110_LINK_ENC(enc);
        union dpcd_training_lane_set training_lane_set = { { 0 } };
        int32_t lane = 0;
        struct bp_transmitter_control cntl = { 0 };

        if (!link_settings) {
                BREAK_TO_DEBUGGER();
                return;
        }

        cntl.action = TRANSMITTER_CONTROL_SET_VOLTAGE_AND_PREEMPASIS;
        cntl.transmitter = enc110->base.transmitter;
        cntl.connector_obj_id = enc110->base.connector;
        cntl.lanes_number = link_settings->link_settings.lane_count;
        cntl.hpd_sel = enc110->base.hpd_source;
        cntl.pixel_clock = link_settings->link_settings.link_rate *
                                                LINK_RATE_REF_FREQ_IN_KHZ;

        for (lane = 0; lane < link_settings->link_settings.lane_count; lane++) {
                /* translate lane settings */

                training_lane_set.bits.VOLTAGE_SWING_SET =
                        link_settings->lane_settings[lane].VOLTAGE_SWING;
                training_lane_set.bits.PRE_EMPHASIS_SET =
                        link_settings->lane_settings[lane].PRE_EMPHASIS;

                /* post cursor 2 setting only applies to HBR2 link rate */
                if (link_settings->link_settings.link_rate == LINK_RATE_HIGH2) {
                        /* this is passed to VBIOS
                         * to program post cursor 2 level */

                        training_lane_set.bits.POST_CURSOR2_SET =
                                link_settings->lane_settings[lane].POST_CURSOR2;
                }

                cntl.lane_select = lane;
                cntl.lane_settings = training_lane_set.raw;

                /* call VBIOS table to set voltage swing and pre-emphasis */
                link_transmitter_control(enc110, &cntl);
        }
}

/* set DP PHY test and training patterns */
void dce110_link_encoder_dp_set_phy_pattern(
        struct link_encoder *enc,
        const struct encoder_set_dp_phy_pattern_param *param)
{
        struct dce110_link_encoder *enc110 = TO_DCE110_LINK_ENC(enc);

        switch (param->dp_phy_pattern) {
        case DP_TEST_PATTERN_TRAINING_PATTERN1:
                dce110_link_encoder_set_dp_phy_pattern_training_pattern(enc, 0);
                break;
        case DP_TEST_PATTERN_TRAINING_PATTERN2:
                dce110_link_encoder_set_dp_phy_pattern_training_pattern(enc, 1);
                break;
        case DP_TEST_PATTERN_TRAINING_PATTERN3:
                dce110_link_encoder_set_dp_phy_pattern_training_pattern(enc, 2);
                break;
        case DP_TEST_PATTERN_TRAINING_PATTERN4:
                dce110_link_encoder_set_dp_phy_pattern_training_pattern(enc, 3);
                break;
        case DP_TEST_PATTERN_D102:
                set_dp_phy_pattern_d102(enc110);
                break;
        case DP_TEST_PATTERN_SYMBOL_ERROR:
                set_dp_phy_pattern_symbol_error(enc110);
                break;
        case DP_TEST_PATTERN_PRBS7:
                set_dp_phy_pattern_prbs7(enc110);
                break;
        case DP_TEST_PATTERN_80BIT_CUSTOM:
                set_dp_phy_pattern_80bit_custom(
                        enc110, param->custom_pattern);
                break;
        case DP_TEST_PATTERN_CP2520_1:
                set_dp_phy_pattern_hbr2_compliance_cp2520_2(enc110, 1);
                break;
        case DP_TEST_PATTERN_CP2520_2:
                set_dp_phy_pattern_hbr2_compliance_cp2520_2(enc110, 2);
                break;
        case DP_TEST_PATTERN_CP2520_3:
                set_dp_phy_pattern_hbr2_compliance_cp2520_2(enc110, 3);
                break;
        case DP_TEST_PATTERN_VIDEO_MODE: {
                set_dp_phy_pattern_passthrough_mode(
                        enc110, param->dp_panel_mode);
                break;
        }

        default:
                /* invalid phy pattern */
                ASSERT_CRITICAL(false);
                break;
        }
}

static void fill_stream_allocation_row_info(
        const struct link_mst_stream_allocation *stream_allocation,
        uint32_t *src,
        uint32_t *slots)
{
        const struct stream_encoder *stream_enc = stream_allocation->stream_enc;

        if (stream_enc) {
                *src = stream_enc->id;
                *slots = stream_allocation->slot_count;
        } else {
                *src = 0;
                *slots = 0;
        }
}

/* programs DP MST VC payload allocation */
void dce110_link_encoder_update_mst_stream_allocation_table(
        struct link_encoder *enc,
        const struct link_mst_stream_allocation_table *table)
{
        struct dce110_link_encoder *enc110 = TO_DCE110_LINK_ENC(enc);
        uint32_t value0 = 0;
        uint32_t value1 = 0;
        uint32_t value2 = 0;
        uint32_t slots = 0;
        uint32_t src = 0;
        uint32_t retries = 0;

        /* For CZ, there are only 3 pipes. So Virtual channel is up 3.*/

        /* --- Set MSE Stream Attribute -
         * Setup VC Payload Table on Tx Side,
         * Issue allocation change trigger
         * to commit payload on both tx and rx side */

        /* we should clean-up table each time */

        if (table->stream_count >= 1) {
                fill_stream_allocation_row_info(
                        &table->stream_allocations[0],
                        &src,
                        &slots);
        } else {
                src = 0;
                slots = 0;
        }

        REG_UPDATE_2(DP_MSE_SAT0,
                        DP_MSE_SAT_SRC0, src,
                        DP_MSE_SAT_SLOT_COUNT0, slots);

        if (table->stream_count >= 2) {
                fill_stream_allocation_row_info(
                        &table->stream_allocations[1],
                        &src,
                        &slots);
        } else {
                src = 0;
                slots = 0;
        }

        REG_UPDATE_2(DP_MSE_SAT0,
                        DP_MSE_SAT_SRC1, src,
                        DP_MSE_SAT_SLOT_COUNT1, slots);

        if (table->stream_count >= 3) {
                fill_stream_allocation_row_info(
                        &table->stream_allocations[2],
                        &src,
                        &slots);
        } else {
                src = 0;
                slots = 0;
        }

        REG_UPDATE_2(DP_MSE_SAT1,
                        DP_MSE_SAT_SRC2, src,
                        DP_MSE_SAT_SLOT_COUNT2, slots);

        if (table->stream_count >= 4) {
                fill_stream_allocation_row_info(
                        &table->stream_allocations[3],
                        &src,
                        &slots);
        } else {
                src = 0;
                slots = 0;
        }

        REG_UPDATE_2(DP_MSE_SAT1,
                        DP_MSE_SAT_SRC3, src,
                        DP_MSE_SAT_SLOT_COUNT3, slots);

        /* --- wait for transaction finish */

        /* send allocation change trigger (ACT) ?
         * this step first sends the ACT,
         * then double buffers the SAT into the hardware
         * making the new allocation active on the DP MST mode link */


        /* DP_MSE_SAT_UPDATE:
         * 0 - No Action
         * 1 - Update SAT with trigger
         * 2 - Update SAT without trigger */

        REG_UPDATE(DP_MSE_SAT_UPDATE,
                        DP_MSE_SAT_UPDATE, 1);

        /* wait for update to complete
         * (i.e. DP_MSE_SAT_UPDATE field is reset to 0)
         * then wait for the transmission
         * of at least 16 MTP headers on immediate local link.
         * i.e. DP_MSE_16_MTP_KEEPOUT field (read only) is reset to 0
         * a value of 1 indicates that DP MST mode
         * is in the 16 MTP keepout region after a VC has been added.
         * MST stream bandwidth (VC rate) can be configured
         * after this bit is cleared */

        do {
                udelay(10);

                value0 = REG_READ(DP_MSE_SAT_UPDATE);

                REG_GET(DP_MSE_SAT_UPDATE,
                                DP_MSE_SAT_UPDATE, &value1);

                REG_GET(DP_MSE_SAT_UPDATE,
                                DP_MSE_16_MTP_KEEPOUT, &value2);

                /* bit field DP_MSE_SAT_UPDATE is set to 1 already */
                if (!value1 && !value2)
                        break;
                ++retries;
        } while (retries < DP_MST_UPDATE_MAX_RETRY);
}

void dce110_link_encoder_connect_dig_be_to_fe(
        struct link_encoder *enc,
        enum engine_id engine,
        bool connect)
{
        struct dce110_link_encoder *enc110 = TO_DCE110_LINK_ENC(enc);
        uint32_t field;

        if (engine != ENGINE_ID_UNKNOWN) {

                REG_GET(DIG_BE_CNTL, DIG_FE_SOURCE_SELECT, &field);

                if (connect)
                        field |= get_frontend_source(engine);
                else
                        field &= ~get_frontend_source(engine);

                REG_UPDATE(DIG_BE_CNTL, DIG_FE_SOURCE_SELECT, field);
        }
}

void dce110_link_encoder_enable_hpd(struct link_encoder *enc)
{
        struct dce110_link_encoder *enc110 = TO_DCE110_LINK_ENC(enc);
        struct dc_context *ctx = enc110->base.ctx;
        uint32_t addr = HPD_REG(DC_HPD_CONTROL);
        uint32_t hpd_enable = 0;
        uint32_t value = dm_read_reg(ctx, addr);

        get_reg_field_value(hpd_enable, DC_HPD_CONTROL, DC_HPD_EN);

        if (hpd_enable == 0)
                set_reg_field_value(value, 1, DC_HPD_CONTROL, DC_HPD_EN);
}

void dce110_link_encoder_disable_hpd(struct link_encoder *enc)
{
        struct dce110_link_encoder *enc110 = TO_DCE110_LINK_ENC(enc);
        struct dc_context *ctx = enc110->base.ctx;
        uint32_t addr = HPD_REG(DC_HPD_CONTROL);
        uint32_t value = dm_read_reg(ctx, addr);

        set_reg_field_value(value, 0, DC_HPD_CONTROL, DC_HPD_EN);
}