/*
 * Copyright 2021 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 "reg_helper.h"

#include "core_types.h"
#include "link_encoder.h"
#include "dcn31/dcn31_dio_link_encoder.h"
#include "dcn32/dcn32_dio_link_encoder.h"
#include "dcn401_dio_link_encoder.h"
#include "stream_encoder.h"
#include "dc_bios_types.h"

#include "gpio_service_interface.h"

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

#define CTX \
        enc10->base.ctx
#define DC_LOGGER \
        enc10->base.ctx->logger

#define REG(reg)\
        (enc10->link_regs->reg)

#undef FN
#define FN(reg_name, field_name) \
        enc10->link_shift->field_name, enc10->link_mask->field_name

#define AUX_REG(reg)\
        (enc10->aux_regs->reg)

#define AUX_REG_READ(reg_name) \
                dm_read_reg(CTX, AUX_REG(reg_name))

#define AUX_REG_WRITE(reg_name, val) \
                        dm_write_reg(CTX, AUX_REG(reg_name), val)

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

void enc401_hw_init(struct link_encoder *enc)
{
        struct dcn10_link_encoder *enc10 = TO_DCN10_LINK_ENC(enc);

/*
        00 - DP_AUX_DPHY_RX_DETECTION_THRESHOLD__1to2 : 1/2
        01 - DP_AUX_DPHY_RX_DETECTION_THRESHOLD__3to4 : 3/4
        02 - DP_AUX_DPHY_RX_DETECTION_THRESHOLD__7to8 : 7/8
        03 - DP_AUX_DPHY_RX_DETECTION_THRESHOLD__15to16 : 15/16
        04 - DP_AUX_DPHY_RX_DETECTION_THRESHOLD__31to32 : 31/32
        05 - DP_AUX_DPHY_RX_DETECTION_THRESHOLD__63to64 : 63/64
        06 - DP_AUX_DPHY_RX_DETECTION_THRESHOLD__127to128 : 127/128
        07 - DP_AUX_DPHY_RX_DETECTION_THRESHOLD__255to256 : 255/256
*/

/*
        AUX_REG_UPDATE_5(AUX_DPHY_RX_CONTROL0,
        AUX_RX_START_WINDOW = 1 [6:4]
        AUX_RX_RECEIVE_WINDOW = 1 default is 2 [10:8]
        AUX_RX_HALF_SYM_DETECT_LEN  = 1 [13:12] default is 1
        AUX_RX_TRANSITION_FILTER_EN = 1 [16] default is 1
        AUX_RX_ALLOW_BELOW_THRESHOLD_PHASE_DETECT [17] is 0  default is 0
        AUX_RX_ALLOW_BELOW_THRESHOLD_START [18] is 1  default is 1
        AUX_RX_ALLOW_BELOW_THRESHOLD_STOP [19] is 1  default is 1
        AUX_RX_PHASE_DETECT_LEN,  [21,20] = 0x3 default is 3
        AUX_RX_DETECTION_THRESHOLD [30:28] = 1
*/
        AUX_REG_WRITE(AUX_DPHY_RX_CONTROL0, 0x103d1110);

        AUX_REG_WRITE(AUX_DPHY_TX_CONTROL, 0x21c7a);

        //AUX_DPHY_TX_REF_CONTROL'AUX_TX_REF_DIV HW default is 0x32;
        // Set AUX_TX_REF_DIV Divider to generate 2 MHz reference from refclk
        // 27MHz -> 0xd
        // 100MHz -> 0x32
        // 48MHz -> 0x18

        // Set TMDS_CTL0 to 1.  This is a legacy setting.
        REG_UPDATE(TMDS_CTL_BITS, TMDS_CTL0, 1);

        dcn10_aux_initialize(enc10);
}


void dcn401_link_encoder_enable_dp_output(
        struct link_encoder *enc,
        const struct dc_link_settings *link_settings,
        enum clock_source_id clock_source)
{
        if (!enc->ctx->dc->debug.avoid_vbios_exec_table) {
                dcn10_link_encoder_enable_dp_output(enc, link_settings, clock_source);
                return;
        }
}

void dcn401_link_encoder_setup(
        struct link_encoder *enc,
        enum signal_type signal)
{
        struct dcn10_link_encoder *enc10 = TO_DCN10_LINK_ENC(enc);

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

bool dcn401_is_dig_enabled(struct link_encoder *enc)
{
        uint32_t clk_enabled;
        uint32_t dig_enabled;
        struct dcn10_link_encoder *enc10 = TO_DCN10_LINK_ENC(enc);

        REG_GET(DIG_BE_CLK_CNTL, DIG_BE_CLK_EN, &clk_enabled);
        REG_GET(DIG_BE_EN_CNTL, DIG_BE_ENABLE, &dig_enabled);
        return (clk_enabled == 1 && dig_enabled == 1);
}

enum signal_type dcn401_get_dig_mode(
        struct link_encoder *enc)
{
        struct dcn10_link_encoder *enc10 = TO_DCN10_LINK_ENC(enc);
        uint32_t value;
        REG_GET(DIG_BE_CLK_CNTL, DIG_BE_MODE, &value);
        switch (value) {
        case 0:
                return SIGNAL_TYPE_DISPLAY_PORT;
        case 2:
                return SIGNAL_TYPE_DVI_SINGLE_LINK;
        case 3:
                return SIGNAL_TYPE_HDMI_TYPE_A;
        case 5:
                return SIGNAL_TYPE_DISPLAY_PORT_MST;
        default:
                return SIGNAL_TYPE_NONE;
        }
}

static const struct link_encoder_funcs dcn401_link_enc_funcs = {
        .read_state = link_enc2_read_state,
        .validate_output_with_stream =
                        dcn30_link_encoder_validate_output_with_stream,
        .hw_init = enc401_hw_init,
        .setup = dcn401_link_encoder_setup,
        .enable_tmds_output = dcn10_link_encoder_enable_tmds_output,
        .enable_dp_output = dcn401_link_encoder_enable_dp_output,
        .enable_dp_mst_output = dcn10_link_encoder_enable_dp_mst_output,
        .disable_output = dcn10_link_encoder_disable_output,
        .dp_set_lane_settings = dcn10_link_encoder_dp_set_lane_settings,
        .dp_set_phy_pattern = dcn10_link_encoder_dp_set_phy_pattern,
        .update_mst_stream_allocation_table =
                dcn10_link_encoder_update_mst_stream_allocation_table,
        .psr_program_dp_dphy_fast_training =
                        dcn10_psr_program_dp_dphy_fast_training,
        .psr_program_secondary_packet = dcn10_psr_program_secondary_packet,
        .connect_dig_be_to_fe = dcn10_link_encoder_connect_dig_be_to_fe,
        .enable_hpd = dcn10_link_encoder_enable_hpd,
        .disable_hpd = dcn10_link_encoder_disable_hpd,
        .is_dig_enabled = dcn401_is_dig_enabled,
        .destroy = dcn10_link_encoder_destroy,
        .fec_set_enable = enc2_fec_set_enable,
        .fec_set_ready = enc2_fec_set_ready,
        .fec_is_active = enc2_fec_is_active,
        .get_dig_frontend = dcn10_get_dig_frontend,
        .get_dig_mode = dcn401_get_dig_mode,
        .is_in_alt_mode = dcn32_link_encoder_is_in_alt_mode,
        .get_max_link_cap = dcn32_link_encoder_get_max_link_cap,
        .set_dio_phy_mux = dcn31_link_encoder_set_dio_phy_mux,
        .get_hpd_state = dcn10_get_hpd_state,
        .program_hpd_filter = dcn10_program_hpd_filter,
};

void dcn401_link_encoder_construct(
        struct dcn20_link_encoder *enc20,
        const struct encoder_init_data *init_data,
        const struct encoder_feature_support *enc_features,
        const struct dcn10_link_enc_registers *link_regs,
        const struct dcn10_link_enc_aux_registers *aux_regs,
        const struct dcn10_link_enc_hpd_registers *hpd_regs,
        const struct dcn10_link_enc_shift *link_shift,
        const struct dcn10_link_enc_mask *link_mask)
{
        struct bp_connector_speed_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;
        struct dcn10_link_encoder *enc10 = &enc20->enc10;

        enc10->base.funcs = &dcn401_link_enc_funcs;
        enc10->base.ctx = init_data->ctx;
        enc10->base.id = init_data->encoder;

        enc10->base.hpd_gpio = init_data->hpd_gpio;
        enc10->base.hpd_source = init_data->hpd_source;
        enc10->base.connector = init_data->connector;


        enc10->base.preferred_engine = ENGINE_ID_UNKNOWN;

        enc10->base.features = *enc_features;
        if (enc10->base.connector.id == CONNECTOR_ID_USBC)
                enc10->base.features.flags.bits.DP_IS_USB_C = 1;

        enc10->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))
                enc10->base.features.flags.bits.
                        DP_SINK_DETECT_POLL_DATA_PIN = true;*/

        enc10->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;

        enc10->link_regs = link_regs;
        enc10->aux_regs = aux_regs;
        enc10->hpd_regs = hpd_regs;
        enc10->link_shift = link_shift;
        enc10->link_mask = link_mask;

        switch (enc10->base.transmitter) {
        case TRANSMITTER_UNIPHY_A:
                enc10->base.preferred_engine = ENGINE_ID_DIGA;
        break;
        case TRANSMITTER_UNIPHY_B:
                enc10->base.preferred_engine = ENGINE_ID_DIGB;
        break;
        case TRANSMITTER_UNIPHY_C:
                enc10->base.preferred_engine = ENGINE_ID_DIGC;
        break;
        case TRANSMITTER_UNIPHY_D:
                enc10->base.preferred_engine = ENGINE_ID_DIGD;
        break;
        case TRANSMITTER_UNIPHY_E:
                enc10->base.preferred_engine = ENGINE_ID_DIGE;
        break;
        default:
                ASSERT_CRITICAL(false);
                enc10->base.preferred_engine = ENGINE_ID_UNKNOWN;
        }

        /* default to one to mirror Windows behavior */
        enc10->base.features.flags.bits.HDMI_6GB_EN = 1;

        if (bp_funcs->get_connector_speed_cap_info)
                result = bp_funcs->get_connector_speed_cap_info(enc10->base.ctx->dc_bios,
                                                enc10->base.connector, &bp_cap_info);

        /* Override features with DCE-specific values */
        if (result == BP_RESULT_OK) {
                enc10->base.features.flags.bits.IS_HBR2_CAPABLE =
                                bp_cap_info.DP_HBR2_EN;
                enc10->base.features.flags.bits.IS_HBR3_CAPABLE =
                                bp_cap_info.DP_HBR3_EN;
                enc10->base.features.flags.bits.HDMI_6GB_EN = bp_cap_info.HDMI_6GB_EN;
                enc10->base.features.flags.bits.IS_DP2_CAPABLE = 1;
                enc10->base.features.flags.bits.IS_UHBR10_CAPABLE = bp_cap_info.DP_UHBR10_EN;
                enc10->base.features.flags.bits.IS_UHBR13_5_CAPABLE = bp_cap_info.DP_UHBR13_5_EN;
                enc10->base.features.flags.bits.IS_UHBR20_CAPABLE = bp_cap_info.DP_UHBR20_EN;
        } else {
                DC_LOG_WARNING("%s: Failed to get encoder_cap_info from VBIOS with error code %d!\n",
                                __func__,
                                result);
        }
        if (enc10->base.ctx->dc->debug.hdmi20_disable) {
                enc10->base.features.flags.bits.HDMI_6GB_EN = 0;
        }
}