/*
 * 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 "reg_helper.h"
#include "dcn10_optc.h"
#include "dc.h"

#define REG(reg)\
        optc1->tg_regs->reg

#define CTX \
        optc1->base.ctx

#undef FN
#define FN(reg_name, field_name) \
        optc1->tg_shift->field_name, optc1->tg_mask->field_name

#define STATIC_SCREEN_EVENT_MASK_RANGETIMING_DOUBLE_BUFFER_UPDATE_EN 0x100

/**
* apply_front_porch_workaround  TODO FPGA still need?
*
* This is a workaround for a bug that has existed since R5xx and has not been
* fixed keep Front porch at minimum 2 for Interlaced mode or 1 for progressive.
*/
static void optc1_apply_front_porch_workaround(
        struct timing_generator *optc,
        struct dc_crtc_timing *timing)
{
        if (timing->flags.INTERLACE == 1) {
                if (timing->v_front_porch < 2)
                        timing->v_front_porch = 2;
        } else {
                if (timing->v_front_porch < 1)
                        timing->v_front_porch = 1;
        }
}

void optc1_program_global_sync(
                struct timing_generator *optc)
{
        struct optc *optc1 = DCN10TG_FROM_TG(optc);

        if (optc->dlg_otg_param.vstartup_start == 0) {
                BREAK_TO_DEBUGGER();
                return;
        }

        REG_SET(OTG_VSTARTUP_PARAM, 0,
                VSTARTUP_START, optc->dlg_otg_param.vstartup_start);

        REG_SET_2(OTG_VUPDATE_PARAM, 0,
                        VUPDATE_OFFSET, optc->dlg_otg_param.vupdate_offset,
                        VUPDATE_WIDTH, optc->dlg_otg_param.vupdate_width);

        REG_SET(OTG_VREADY_PARAM, 0,
                        VREADY_OFFSET, optc->dlg_otg_param.vready_offset);
}

static void optc1_disable_stereo(struct timing_generator *optc)
{
        struct optc *optc1 = DCN10TG_FROM_TG(optc);

        REG_SET(OTG_STEREO_CONTROL, 0,
                OTG_STEREO_EN, 0);

        REG_SET_2(OTG_3D_STRUCTURE_CONTROL, 0,
                OTG_3D_STRUCTURE_EN, 0,
                OTG_3D_STRUCTURE_STEREO_SEL_OVR, 0);
}

void optc1_setup_vertical_interrupt0(
                struct timing_generator *optc,
                uint32_t start_line,
                uint32_t end_line)
{
        struct optc *optc1 = DCN10TG_FROM_TG(optc);

        REG_SET_2(OTG_VERTICAL_INTERRUPT0_POSITION, 0,
                        OTG_VERTICAL_INTERRUPT0_LINE_START, start_line,
                        OTG_VERTICAL_INTERRUPT0_LINE_END, end_line);
}

void optc1_setup_vertical_interrupt1(
                struct timing_generator *optc,
                uint32_t start_line)
{
        struct optc *optc1 = DCN10TG_FROM_TG(optc);

        REG_SET(OTG_VERTICAL_INTERRUPT1_POSITION, 0,
                                OTG_VERTICAL_INTERRUPT1_LINE_START, start_line);
}

void optc1_setup_vertical_interrupt2(
                struct timing_generator *optc,
                uint32_t start_line)
{
        struct optc *optc1 = DCN10TG_FROM_TG(optc);

        REG_SET(OTG_VERTICAL_INTERRUPT2_POSITION, 0,
                        OTG_VERTICAL_INTERRUPT2_LINE_START, start_line);
}

/**
 * program_timing_generator   used by mode timing set
 * Program CRTC Timing Registers - OTG_H_*, OTG_V_*, Pixel repetition.
 * Including SYNC. Call BIOS command table to program Timings.
 */
void optc1_program_timing(
        struct timing_generator *optc,
        const struct dc_crtc_timing *dc_crtc_timing,
        bool use_vbios)
{
        struct dc_crtc_timing patched_crtc_timing;
        uint32_t vesa_sync_start;
        uint32_t asic_blank_end;
        uint32_t asic_blank_start;
        uint32_t v_total;
        uint32_t v_sync_end;
        uint32_t v_init, v_fp2;
        uint32_t h_sync_polarity, v_sync_polarity;
        uint32_t start_point = 0;
        uint32_t field_num = 0;
        uint32_t h_div_2;
        int32_t vertical_line_start;

        struct optc *optc1 = DCN10TG_FROM_TG(optc);

        patched_crtc_timing = *dc_crtc_timing;
        optc1_apply_front_porch_workaround(optc, &patched_crtc_timing);

        /* Load horizontal timing */

        /* CRTC_H_TOTAL = vesa.h_total - 1 */
        REG_SET(OTG_H_TOTAL, 0,
                        OTG_H_TOTAL,  patched_crtc_timing.h_total - 1);

        /* h_sync_start = 0, h_sync_end = vesa.h_sync_width */
        REG_UPDATE_2(OTG_H_SYNC_A,
                        OTG_H_SYNC_A_START, 0,
                        OTG_H_SYNC_A_END, patched_crtc_timing.h_sync_width);

        /* asic_h_blank_end = HsyncWidth + HbackPorch =
         * vesa. usHorizontalTotal - vesa. usHorizontalSyncStart -
         * vesa.h_left_border
         */
        vesa_sync_start = patched_crtc_timing.h_addressable +
                        patched_crtc_timing.h_border_right +
                        patched_crtc_timing.h_front_porch;

        asic_blank_end = patched_crtc_timing.h_total -
                        vesa_sync_start -
                        patched_crtc_timing.h_border_left;

        /* h_blank_start = v_blank_end + v_active */
        asic_blank_start = asic_blank_end +
                        patched_crtc_timing.h_border_left +
                        patched_crtc_timing.h_addressable +
                        patched_crtc_timing.h_border_right;

        REG_UPDATE_2(OTG_H_BLANK_START_END,
                        OTG_H_BLANK_START, asic_blank_start,
                        OTG_H_BLANK_END, asic_blank_end);

        /* h_sync polarity */
        h_sync_polarity = patched_crtc_timing.flags.HSYNC_POSITIVE_POLARITY ?
                        0 : 1;

        REG_UPDATE(OTG_H_SYNC_A_CNTL,
                        OTG_H_SYNC_A_POL, h_sync_polarity);

        v_total = patched_crtc_timing.v_total - 1;

        REG_SET(OTG_V_TOTAL, 0,
                        OTG_V_TOTAL, v_total);

        /* In case of V_TOTAL_CONTROL is on, make sure OTG_V_TOTAL_MAX and
         * OTG_V_TOTAL_MIN are equal to V_TOTAL.
         */
        REG_SET(OTG_V_TOTAL_MAX, 0,
                OTG_V_TOTAL_MAX, v_total);
        REG_SET(OTG_V_TOTAL_MIN, 0,
                OTG_V_TOTAL_MIN, v_total);

        /* v_sync_start = 0, v_sync_end = v_sync_width */
        v_sync_end = patched_crtc_timing.v_sync_width;

        REG_UPDATE_2(OTG_V_SYNC_A,
                        OTG_V_SYNC_A_START, 0,
                        OTG_V_SYNC_A_END, v_sync_end);

        vesa_sync_start = patched_crtc_timing.v_addressable +
                        patched_crtc_timing.v_border_bottom +
                        patched_crtc_timing.v_front_porch;

        asic_blank_end = (patched_crtc_timing.v_total -
                        vesa_sync_start -
                        patched_crtc_timing.v_border_top);

        /* v_blank_start = v_blank_end + v_active */
        asic_blank_start = asic_blank_end +
                        (patched_crtc_timing.v_border_top +
                        patched_crtc_timing.v_addressable +
                        patched_crtc_timing.v_border_bottom);

        vertical_line_start = asic_blank_end - optc->dlg_otg_param.vstartup_start + 1;
        v_fp2 = 0;
        if (vertical_line_start < 0)
                v_fp2 = -vertical_line_start;

        REG_UPDATE_2(OTG_V_BLANK_START_END,
                        OTG_V_BLANK_START, asic_blank_start,
                        OTG_V_BLANK_END, asic_blank_end);

        /* v_sync polarity */
        v_sync_polarity = patched_crtc_timing.flags.VSYNC_POSITIVE_POLARITY ?
                        0 : 1;

        REG_UPDATE(OTG_V_SYNC_A_CNTL,
                OTG_V_SYNC_A_POL, v_sync_polarity);

        v_init = asic_blank_start;
        if (optc->dlg_otg_param.signal == SIGNAL_TYPE_DISPLAY_PORT ||
                optc->dlg_otg_param.signal == SIGNAL_TYPE_DISPLAY_PORT_MST ||
                optc->dlg_otg_param.signal == SIGNAL_TYPE_EDP) {
                start_point = 1;
                if (patched_crtc_timing.flags.INTERLACE == 1)
                        field_num = 1;
        }

        /* Interlace */
        if (REG(OTG_INTERLACE_CONTROL)) {
                if (patched_crtc_timing.flags.INTERLACE == 1) {
                        REG_UPDATE(OTG_INTERLACE_CONTROL,
                                        OTG_INTERLACE_ENABLE, 1);
                        v_init = v_init / 2;
                        if ((optc->dlg_otg_param.vstartup_start/2)*2 > asic_blank_end)
                                v_fp2 = v_fp2 / 2;
                } else
                        REG_UPDATE(OTG_INTERLACE_CONTROL,
                                        OTG_INTERLACE_ENABLE, 0);
        }

        /* VTG enable set to 0 first VInit */
        REG_UPDATE(CONTROL,
                        VTG0_ENABLE, 0);

        REG_UPDATE_2(CONTROL,
                        VTG0_FP2, v_fp2,
                        VTG0_VCOUNT_INIT, v_init);

        /* original code is using VTG offset to address OTG reg, seems wrong */
        REG_UPDATE_2(OTG_CONTROL,
                        OTG_START_POINT_CNTL, start_point,
                        OTG_FIELD_NUMBER_CNTL, field_num);

        optc1_program_global_sync(optc);

        /* TODO
         * patched_crtc_timing.flags.HORZ_COUNT_BY_TWO == 1
         * program_horz_count_by_2
         * for DVI 30bpp mode, 0 otherwise
         * program_horz_count_by_2(optc, &patched_crtc_timing);
         */

        /* Enable stereo - only when we need to pack 3D frame. Other types
         * of stereo handled in explicit call
         */

        h_div_2 = optc1_is_two_pixels_per_containter(&patched_crtc_timing);
        REG_UPDATE(OTG_H_TIMING_CNTL,
                        OTG_H_TIMING_DIV_BY2, h_div_2 || optc1->comb_opp_id != 0xf);

}

void optc1_set_blank_data_double_buffer(struct timing_generator *optc, bool enable)
{
        struct optc *optc1 = DCN10TG_FROM_TG(optc);

        uint32_t blank_data_double_buffer_enable = enable ? 1 : 0;

        REG_UPDATE(OTG_DOUBLE_BUFFER_CONTROL,
                        OTG_BLANK_DATA_DOUBLE_BUFFER_EN, blank_data_double_buffer_enable);
}

/**
 * unblank_crtc
 * Call ASIC Control Object to UnBlank CRTC.
 */
static void optc1_unblank_crtc(struct timing_generator *optc)
{
        struct optc *optc1 = DCN10TG_FROM_TG(optc);

        REG_UPDATE_2(OTG_BLANK_CONTROL,
                        OTG_BLANK_DATA_EN, 0,
                        OTG_BLANK_DE_MODE, 0);

        /* W/A for automated testing
         * Automated testing will fail underflow test as there
         * sporadic underflows which occur during the optc blank
         * sequence.  As a w/a, clear underflow on unblank.
         * This prevents the failure, but will not mask actual
         * underflow that affect real use cases.
         */
        optc1_clear_optc_underflow(optc);
}

/**
 * blank_crtc
 * Call ASIC Control Object to Blank CRTC.
 */

static void optc1_blank_crtc(struct timing_generator *optc)
{
        struct optc *optc1 = DCN10TG_FROM_TG(optc);

        REG_UPDATE_2(OTG_BLANK_CONTROL,
                        OTG_BLANK_DATA_EN, 1,
                        OTG_BLANK_DE_MODE, 0);

        optc1_set_blank_data_double_buffer(optc, false);
}

void optc1_set_blank(struct timing_generator *optc,
                bool enable_blanking)
{
        if (enable_blanking)
                optc1_blank_crtc(optc);
        else
                optc1_unblank_crtc(optc);
}

bool optc1_is_blanked(struct timing_generator *optc)
{
        struct optc *optc1 = DCN10TG_FROM_TG(optc);
        uint32_t blank_en;
        uint32_t blank_state;

        REG_GET_2(OTG_BLANK_CONTROL,
                        OTG_BLANK_DATA_EN, &blank_en,
                        OTG_CURRENT_BLANK_STATE, &blank_state);

        return blank_en && blank_state;
}

void optc1_enable_optc_clock(struct timing_generator *optc, bool enable)
{
        struct optc *optc1 = DCN10TG_FROM_TG(optc);

        if (enable) {
                REG_UPDATE_2(OPTC_INPUT_CLOCK_CONTROL,
                                OPTC_INPUT_CLK_EN, 1,
                                OPTC_INPUT_CLK_GATE_DIS, 1);

                REG_WAIT(OPTC_INPUT_CLOCK_CONTROL,
                                OPTC_INPUT_CLK_ON, 1,
                                1, 1000);

                /* Enable clock */
                REG_UPDATE_2(OTG_CLOCK_CONTROL,
                                OTG_CLOCK_EN, 1,
                                OTG_CLOCK_GATE_DIS, 1);
                REG_WAIT(OTG_CLOCK_CONTROL,
                                OTG_CLOCK_ON, 1,
                                1, 1000);
        } else  {
                REG_UPDATE_2(OTG_CLOCK_CONTROL,
                                OTG_CLOCK_GATE_DIS, 0,
                                OTG_CLOCK_EN, 0);

                REG_UPDATE_2(OPTC_INPUT_CLOCK_CONTROL,
                                OPTC_INPUT_CLK_GATE_DIS, 0,
                                OPTC_INPUT_CLK_EN, 0);
        }
}

/**
 * Enable CRTC
 * Enable CRTC - call ASIC Control Object to enable Timing generator.
 */
static bool optc1_enable_crtc(struct timing_generator *optc)
{
        /* TODO FPGA wait for answer
         * OTG_MASTER_UPDATE_MODE != CRTC_MASTER_UPDATE_MODE
         * OTG_MASTER_UPDATE_LOCK != CRTC_MASTER_UPDATE_LOCK
         */
        struct optc *optc1 = DCN10TG_FROM_TG(optc);

        /* opp instance for OTG. For DCN1.0, ODM is remoed.
         * OPP and OPTC should 1:1 mapping
         */
        REG_UPDATE(OPTC_DATA_SOURCE_SELECT,
                        OPTC_SRC_SEL, optc->inst);

        /* VTG enable first is for HW workaround */
        REG_UPDATE(CONTROL,
                        VTG0_ENABLE, 1);

        /* Enable CRTC */
        REG_UPDATE_2(OTG_CONTROL,
                        OTG_DISABLE_POINT_CNTL, 3,
                        OTG_MASTER_EN, 1);

        return true;
}

/* disable_crtc - call ASIC Control Object to disable Timing generator. */
bool optc1_disable_crtc(struct timing_generator *optc)
{
        struct optc *optc1 = DCN10TG_FROM_TG(optc);

        /* disable otg request until end of the first line
         * in the vertical blank region
         */
        REG_UPDATE_2(OTG_CONTROL,
                        OTG_DISABLE_POINT_CNTL, 3,
                        OTG_MASTER_EN, 0);

        REG_UPDATE(CONTROL,
                        VTG0_ENABLE, 0);

        /* CRTC disabled, so disable  clock. */
        REG_WAIT(OTG_CLOCK_CONTROL,
                        OTG_BUSY, 0,
                        1, 100000);

        return true;
}


void optc1_program_blank_color(
                struct timing_generator *optc,
                const struct tg_color *black_color)
{
        struct optc *optc1 = DCN10TG_FROM_TG(optc);

        REG_SET_3(OTG_BLACK_COLOR, 0,
                        OTG_BLACK_COLOR_B_CB, black_color->color_b_cb,
                        OTG_BLACK_COLOR_G_Y, black_color->color_g_y,
                        OTG_BLACK_COLOR_R_CR, black_color->color_r_cr);
}

bool optc1_validate_timing(
        struct timing_generator *optc,
        const struct dc_crtc_timing *timing)
{
        uint32_t v_blank;
        uint32_t h_blank;
        uint32_t min_v_blank;
        struct optc *optc1 = DCN10TG_FROM_TG(optc);

        ASSERT(timing != NULL);

        v_blank = (timing->v_total - timing->v_addressable -
                                        timing->v_border_top - timing->v_border_bottom);

        h_blank = (timing->h_total - timing->h_addressable -
                timing->h_border_right -
                timing->h_border_left);

        if (timing->timing_3d_format != TIMING_3D_FORMAT_NONE &&
                timing->timing_3d_format != TIMING_3D_FORMAT_HW_FRAME_PACKING &&
                timing->timing_3d_format != TIMING_3D_FORMAT_TOP_AND_BOTTOM &&
                timing->timing_3d_format != TIMING_3D_FORMAT_SIDE_BY_SIDE &&
                timing->timing_3d_format != TIMING_3D_FORMAT_FRAME_ALTERNATE &&
                timing->timing_3d_format != TIMING_3D_FORMAT_INBAND_FA)
                return false;

        /* Temporarily blocking interlacing mode until it's supported */
        if (timing->flags.INTERLACE == 1)
                return false;

        /* Check maximum number of pixels supported by Timing Generator
         * (Currently will never fail, in order to fail needs display which
         * needs more than 8192 horizontal and
         * more than 8192 vertical total pixels)
         */
        if (timing->h_total > optc1->max_h_total ||
                timing->v_total > optc1->max_v_total)
                return false;


        if (h_blank < optc1->min_h_blank)
                return false;

        if (timing->h_sync_width  < optc1->min_h_sync_width ||
                 timing->v_sync_width  < optc1->min_v_sync_width)
                return false;

        min_v_blank = timing->flags.INTERLACE?optc1->min_v_blank_interlace:optc1->min_v_blank;

        if (v_blank < min_v_blank)
                return false;

        return true;

}

/*
 * get_vblank_counter
 *
 * @brief
 * Get counter for vertical blanks. use register CRTC_STATUS_FRAME_COUNT which
 * holds the counter of frames.
 *
 * @param
 * struct timing_generator *optc - [in] timing generator which controls the
 * desired CRTC
 *
 * @return
 * Counter of frames, which should equal to number of vblanks.
 */
uint32_t optc1_get_vblank_counter(struct timing_generator *optc)
{
        struct optc *optc1 = DCN10TG_FROM_TG(optc);
        uint32_t frame_count;

        REG_GET(OTG_STATUS_FRAME_COUNT,
                OTG_FRAME_COUNT, &frame_count);

        return frame_count;
}

void optc1_lock(struct timing_generator *optc)
{
        struct optc *optc1 = DCN10TG_FROM_TG(optc);

        REG_SET(OTG_GLOBAL_CONTROL0, 0,
                        OTG_MASTER_UPDATE_LOCK_SEL, optc->inst);
        REG_SET(OTG_MASTER_UPDATE_LOCK, 0,
                        OTG_MASTER_UPDATE_LOCK, 1);

        /* Should be fast, status does not update on maximus */
        if (optc->ctx->dce_environment != DCE_ENV_FPGA_MAXIMUS)
                REG_WAIT(OTG_MASTER_UPDATE_LOCK,
                                UPDATE_LOCK_STATUS, 1,
                                1, 10);
}

void optc1_unlock(struct timing_generator *optc)
{
        struct optc *optc1 = DCN10TG_FROM_TG(optc);

        REG_SET(OTG_MASTER_UPDATE_LOCK, 0,
                        OTG_MASTER_UPDATE_LOCK, 0);
}

void optc1_get_position(struct timing_generator *optc,
                struct crtc_position *position)
{
        struct optc *optc1 = DCN10TG_FROM_TG(optc);

        REG_GET_2(OTG_STATUS_POSITION,
                        OTG_HORZ_COUNT, &position->horizontal_count,
                        OTG_VERT_COUNT, &position->vertical_count);

        REG_GET(OTG_NOM_VERT_POSITION,
                        OTG_VERT_COUNT_NOM, &position->nominal_vcount);
}

bool optc1_is_counter_moving(struct timing_generator *optc)
{
        struct crtc_position position1, position2;

        optc->funcs->get_position(optc, &position1);
        optc->funcs->get_position(optc, &position2);

        if (position1.horizontal_count == position2.horizontal_count &&
                position1.vertical_count == position2.vertical_count)
                return false;
        else
                return true;
}

bool optc1_did_triggered_reset_occur(
        struct timing_generator *optc)
{
        struct optc *optc1 = DCN10TG_FROM_TG(optc);
        uint32_t occurred_force, occurred_vsync;

        REG_GET(OTG_FORCE_COUNT_NOW_CNTL,
                OTG_FORCE_COUNT_NOW_OCCURRED, &occurred_force);

        REG_GET(OTG_VERT_SYNC_CONTROL,
                OTG_FORCE_VSYNC_NEXT_LINE_OCCURRED, &occurred_vsync);

        return occurred_vsync != 0 || occurred_force != 0;
}

void optc1_disable_reset_trigger(struct timing_generator *optc)
{
        struct optc *optc1 = DCN10TG_FROM_TG(optc);

        REG_WRITE(OTG_TRIGA_CNTL, 0);

        REG_SET(OTG_FORCE_COUNT_NOW_CNTL, 0,
                OTG_FORCE_COUNT_NOW_CLEAR, 1);

        REG_SET(OTG_VERT_SYNC_CONTROL, 0,
                OTG_FORCE_VSYNC_NEXT_LINE_CLEAR, 1);
}

void optc1_enable_reset_trigger(struct timing_generator *optc, int source_tg_inst)
{
        struct optc *optc1 = DCN10TG_FROM_TG(optc);
        uint32_t falling_edge;

        REG_GET(OTG_V_SYNC_A_CNTL,
                        OTG_V_SYNC_A_POL, &falling_edge);

        if (falling_edge)
                REG_SET_3(OTG_TRIGA_CNTL, 0,
                                /* vsync signal from selected OTG pipe based
                                 * on OTG_TRIG_SOURCE_PIPE_SELECT setting
                                 */
                                OTG_TRIGA_SOURCE_SELECT, 20,
                                OTG_TRIGA_SOURCE_PIPE_SELECT, source_tg_inst,
                                /* always detect falling edge */
                                OTG_TRIGA_FALLING_EDGE_DETECT_CNTL, 1);
        else
                REG_SET_3(OTG_TRIGA_CNTL, 0,
                                /* vsync signal from selected OTG pipe based
                                 * on OTG_TRIG_SOURCE_PIPE_SELECT setting
                                 */
                                OTG_TRIGA_SOURCE_SELECT, 20,
                                OTG_TRIGA_SOURCE_PIPE_SELECT, source_tg_inst,
                                /* always detect rising edge */
                                OTG_TRIGA_RISING_EDGE_DETECT_CNTL, 1);

        REG_SET(OTG_FORCE_COUNT_NOW_CNTL, 0,
                        /* force H count to H_TOTAL and V count to V_TOTAL in
                         * progressive mode and V_TOTAL-1 in interlaced mode
                         */
                        OTG_FORCE_COUNT_NOW_MODE, 2);
}

void optc1_enable_crtc_reset(
                struct timing_generator *optc,
                int source_tg_inst,
                struct crtc_trigger_info *crtc_tp)
{
        struct optc *optc1 = DCN10TG_FROM_TG(optc);
        uint32_t falling_edge = 0;
        uint32_t rising_edge = 0;

        switch (crtc_tp->event) {

        case CRTC_EVENT_VSYNC_RISING:
                rising_edge = 1;
                break;

        case CRTC_EVENT_VSYNC_FALLING:
                falling_edge = 1;
                break;
        }

        REG_SET_4(OTG_TRIGA_CNTL, 0,
                 /* vsync signal from selected OTG pipe based
                  * on OTG_TRIG_SOURCE_PIPE_SELECT setting
                  */
                  OTG_TRIGA_SOURCE_SELECT, 20,
                  OTG_TRIGA_SOURCE_PIPE_SELECT, source_tg_inst,
                  /* always detect falling edge */
                  OTG_TRIGA_RISING_EDGE_DETECT_CNTL, rising_edge,
                  OTG_TRIGA_FALLING_EDGE_DETECT_CNTL, falling_edge);

        switch (crtc_tp->delay) {
        case TRIGGER_DELAY_NEXT_LINE:
                REG_SET(OTG_VERT_SYNC_CONTROL, 0,
                                OTG_AUTO_FORCE_VSYNC_MODE, 1);
                break;
        case TRIGGER_DELAY_NEXT_PIXEL:
                REG_SET(OTG_FORCE_COUNT_NOW_CNTL, 0,
                        /* force H count to H_TOTAL and V count to V_TOTAL in
                         * progressive mode and V_TOTAL-1 in interlaced mode
                         */
                        OTG_FORCE_COUNT_NOW_MODE, 2);
                break;
        }
}

void optc1_wait_for_state(struct timing_generator *optc,
                enum crtc_state state)
{
        struct optc *optc1 = DCN10TG_FROM_TG(optc);

        switch (state) {
        case CRTC_STATE_VBLANK:
                REG_WAIT(OTG_STATUS,
                                OTG_V_BLANK, 1,
                                1, 100000); /* 1 vupdate at 10hz */
                break;

        case CRTC_STATE_VACTIVE:
                REG_WAIT(OTG_STATUS,
                                OTG_V_ACTIVE_DISP, 1,
                                1, 100000); /* 1 vupdate at 10hz */
                break;

        default:
                break;
        }
}

void optc1_set_early_control(
        struct timing_generator *optc,
        uint32_t early_cntl)
{
        /* asic design change, do not need this control
         * empty for share caller logic
         */
}


void optc1_set_static_screen_control(
        struct timing_generator *optc,
        uint32_t value)
{
        struct optc *optc1 = DCN10TG_FROM_TG(optc);

        /* Bit 8 is no longer applicable in RV for PSR case,
         * set bit 8 to 0 if given
         */
        if ((value & STATIC_SCREEN_EVENT_MASK_RANGETIMING_DOUBLE_BUFFER_UPDATE_EN)
                        != 0)
                value = value &
                ~STATIC_SCREEN_EVENT_MASK_RANGETIMING_DOUBLE_BUFFER_UPDATE_EN;

        REG_SET_2(OTG_STATIC_SCREEN_CONTROL, 0,
                        OTG_STATIC_SCREEN_EVENT_MASK, value,
                        OTG_STATIC_SCREEN_FRAME_COUNT, 2);
}


/**
 *****************************************************************************
 *  Function: set_drr
 *
 *  @brief
 *     Program dynamic refresh rate registers m_OTGx_OTG_V_TOTAL_*.
 *
 *****************************************************************************
 */
void optc1_set_drr(
        struct timing_generator *optc,
        const struct drr_params *params)
{
        struct optc *optc1 = DCN10TG_FROM_TG(optc);

        if (params != NULL &&
                params->vertical_total_max > 0 &&
                params->vertical_total_min > 0) {

                REG_SET(OTG_V_TOTAL_MAX, 0,
                        OTG_V_TOTAL_MAX, params->vertical_total_max - 1);

                REG_SET(OTG_V_TOTAL_MIN, 0,
                        OTG_V_TOTAL_MIN, params->vertical_total_min - 1);

                REG_UPDATE_5(OTG_V_TOTAL_CONTROL,
                                OTG_V_TOTAL_MIN_SEL, 1,
                                OTG_V_TOTAL_MAX_SEL, 1,
                                OTG_FORCE_LOCK_ON_EVENT, 0,
                                OTG_SET_V_TOTAL_MIN_MASK_EN, 0,
                                OTG_SET_V_TOTAL_MIN_MASK, 0);
        } else {
                REG_UPDATE_4(OTG_V_TOTAL_CONTROL,
                                OTG_SET_V_TOTAL_MIN_MASK, 0,
                                OTG_V_TOTAL_MIN_SEL, 0,
                                OTG_V_TOTAL_MAX_SEL, 0,
                                OTG_FORCE_LOCK_ON_EVENT, 0);

                REG_SET(OTG_V_TOTAL_MIN, 0,
                        OTG_V_TOTAL_MIN, 0);

                REG_SET(OTG_V_TOTAL_MAX, 0,
                        OTG_V_TOTAL_MAX, 0);
        }
}

static void optc1_set_test_pattern(
        struct timing_generator *optc,
        /* TODO: replace 'controller_dp_test_pattern' by 'test_pattern_mode'
         * because this is not DP-specific (which is probably somewhere in DP
         * encoder) */
        enum controller_dp_test_pattern test_pattern,
        enum dc_color_depth color_depth)
{
        struct optc *optc1 = DCN10TG_FROM_TG(optc);
        enum test_pattern_color_format bit_depth;
        enum test_pattern_dyn_range dyn_range;
        enum test_pattern_mode mode;
        uint32_t pattern_mask;
        uint32_t pattern_data;
        /* color ramp generator mixes 16-bits color */
        uint32_t src_bpc = 16;
        /* requested bpc */
        uint32_t dst_bpc;
        uint32_t index;
        /* RGB values of the color bars.
         * Produce two RGB colors: RGB0 - white (all Fs)
         * and RGB1 - black (all 0s)
         * (three RGB components for two colors)
         */
        uint16_t src_color[6] = {0xFFFF, 0xFFFF, 0xFFFF, 0x0000,
                                                0x0000, 0x0000};
        /* dest color (converted to the specified color format) */
        uint16_t dst_color[6];
        uint32_t inc_base;

        /* translate to bit depth */
        switch (color_depth) {
        case COLOR_DEPTH_666:
                bit_depth = TEST_PATTERN_COLOR_FORMAT_BPC_6;
        break;
        case COLOR_DEPTH_888:
                bit_depth = TEST_PATTERN_COLOR_FORMAT_BPC_8;
        break;
        case COLOR_DEPTH_101010:
                bit_depth = TEST_PATTERN_COLOR_FORMAT_BPC_10;
        break;
        case COLOR_DEPTH_121212:
                bit_depth = TEST_PATTERN_COLOR_FORMAT_BPC_12;
        break;
        default:
                bit_depth = TEST_PATTERN_COLOR_FORMAT_BPC_8;
        break;
        }

        switch (test_pattern) {
        case CONTROLLER_DP_TEST_PATTERN_COLORSQUARES:
        case CONTROLLER_DP_TEST_PATTERN_COLORSQUARES_CEA:
        {
                dyn_range = (test_pattern ==
                                CONTROLLER_DP_TEST_PATTERN_COLORSQUARES_CEA ?
                                TEST_PATTERN_DYN_RANGE_CEA :
                                TEST_PATTERN_DYN_RANGE_VESA);
                mode = TEST_PATTERN_MODE_COLORSQUARES_RGB;

                REG_UPDATE_2(OTG_TEST_PATTERN_PARAMETERS,
                                OTG_TEST_PATTERN_VRES, 6,
                                OTG_TEST_PATTERN_HRES, 6);

                REG_UPDATE_4(OTG_TEST_PATTERN_CONTROL,
                                OTG_TEST_PATTERN_EN, 1,
                                OTG_TEST_PATTERN_MODE, mode,
                                OTG_TEST_PATTERN_DYNAMIC_RANGE, dyn_range,
                                OTG_TEST_PATTERN_COLOR_FORMAT, bit_depth);
        }
        break;

        case CONTROLLER_DP_TEST_PATTERN_VERTICALBARS:
        case CONTROLLER_DP_TEST_PATTERN_HORIZONTALBARS:
        {
                mode = (test_pattern ==
                        CONTROLLER_DP_TEST_PATTERN_VERTICALBARS ?
                        TEST_PATTERN_MODE_VERTICALBARS :
                        TEST_PATTERN_MODE_HORIZONTALBARS);

                switch (bit_depth) {
                case TEST_PATTERN_COLOR_FORMAT_BPC_6:
                        dst_bpc = 6;
                break;
                case TEST_PATTERN_COLOR_FORMAT_BPC_8:
                        dst_bpc = 8;
                break;
                case TEST_PATTERN_COLOR_FORMAT_BPC_10:
                        dst_bpc = 10;
                break;
                default:
                        dst_bpc = 8;
                break;
                }

                /* adjust color to the required colorFormat */
                for (index = 0; index < 6; index++) {
                        /* dst = 2^dstBpc * src / 2^srcBpc = src >>
                         * (srcBpc - dstBpc);
                         */
                        dst_color[index] =
                                src_color[index] >> (src_bpc - dst_bpc);
                /* CRTC_TEST_PATTERN_DATA has 16 bits,
                 * lowest 6 are hardwired to ZERO
                 * color bits should be left aligned aligned to MSB
                 * XXXXXXXXXX000000 for 10 bit,
                 * XXXXXXXX00000000 for 8 bit and XXXXXX0000000000 for 6
                 */
                        dst_color[index] <<= (16 - dst_bpc);
                }

                REG_WRITE(OTG_TEST_PATTERN_PARAMETERS, 0);

                /* We have to write the mask before data, similar to pipeline.
                 * For example, for 8 bpc, if we want RGB0 to be magenta,
                 * and RGB1 to be cyan,
                 * we need to make 7 writes:
                 * MASK   DATA
                 * 000001 00000000 00000000                     set mask to R0
                 * 000010 11111111 00000000     R0 255, 0xFF00, set mask to G0
                 * 000100 00000000 00000000     G0 0,   0x0000, set mask to B0
                 * 001000 11111111 00000000     B0 255, 0xFF00, set mask to R1
                 * 010000 00000000 00000000     R1 0,   0x0000, set mask to G1
                 * 100000 11111111 00000000     G1 255, 0xFF00, set mask to B1
                 * 100000 11111111 00000000     B1 255, 0xFF00
                 *
                 * we will make a loop of 6 in which we prepare the mask,
                 * then write, then prepare the color for next write.
                 * first iteration will write mask only,
                 * but each next iteration color prepared in
                 * previous iteration will be written within new mask,
                 * the last component will written separately,
                 * mask is not changing between 6th and 7th write
                 * and color will be prepared by last iteration
                 */

                /* write color, color values mask in CRTC_TEST_PATTERN_MASK
                 * is B1, G1, R1, B0, G0, R0
                 */
                pattern_data = 0;
                for (index = 0; index < 6; index++) {
                        /* prepare color mask, first write PATTERN_DATA
                         * will have all zeros
                         */
                        pattern_mask = (1 << index);

                        /* write color component */
                        REG_SET_2(OTG_TEST_PATTERN_COLOR, 0,
                                        OTG_TEST_PATTERN_MASK, pattern_mask,
                                        OTG_TEST_PATTERN_DATA, pattern_data);

                        /* prepare next color component,
                         * will be written in the next iteration
                         */
                        pattern_data = dst_color[index];
                }
                /* write last color component,
                 * it's been already prepared in the loop
                 */
                REG_SET_2(OTG_TEST_PATTERN_COLOR, 0,
                                OTG_TEST_PATTERN_MASK, pattern_mask,
                                OTG_TEST_PATTERN_DATA, pattern_data);

                /* enable test pattern */
                REG_UPDATE_4(OTG_TEST_PATTERN_CONTROL,
                                OTG_TEST_PATTERN_EN, 1,
                                OTG_TEST_PATTERN_MODE, mode,
                                OTG_TEST_PATTERN_DYNAMIC_RANGE, 0,
                                OTG_TEST_PATTERN_COLOR_FORMAT, bit_depth);
        }
        break;

        case CONTROLLER_DP_TEST_PATTERN_COLORRAMP:
        {
                mode = (bit_depth ==
                        TEST_PATTERN_COLOR_FORMAT_BPC_10 ?
                        TEST_PATTERN_MODE_DUALRAMP_RGB :
                        TEST_PATTERN_MODE_SINGLERAMP_RGB);

                switch (bit_depth) {
                case TEST_PATTERN_COLOR_FORMAT_BPC_6:
                        dst_bpc = 6;
                break;
                case TEST_PATTERN_COLOR_FORMAT_BPC_8:
                        dst_bpc = 8;
                break;
                case TEST_PATTERN_COLOR_FORMAT_BPC_10:
                        dst_bpc = 10;
                break;
                default:
                        dst_bpc = 8;
                break;
                }

                /* increment for the first ramp for one color gradation
                 * 1 gradation for 6-bit color is 2^10
                 * gradations in 16-bit color
                 */

                inc_base = (src_bpc - dst_bpc);

                switch (bit_depth) {
                case TEST_PATTERN_COLOR_FORMAT_BPC_6:
                {
                        REG_UPDATE_5(OTG_TEST_PATTERN_PARAMETERS,
                                        OTG_TEST_PATTERN_INC0, inc_base,
                                        OTG_TEST_PATTERN_INC1, 0,
                                        OTG_TEST_PATTERN_HRES, 6,
                                        OTG_TEST_PATTERN_VRES, 6,
                                        OTG_TEST_PATTERN_RAMP0_OFFSET, 0);
                }
                break;
                case TEST_PATTERN_COLOR_FORMAT_BPC_8:
                {
                        REG_UPDATE_5(OTG_TEST_PATTERN_PARAMETERS,
                                        OTG_TEST_PATTERN_INC0, inc_base,
                                        OTG_TEST_PATTERN_INC1, 0,
                                        OTG_TEST_PATTERN_HRES, 8,
                                        OTG_TEST_PATTERN_VRES, 6,
                                        OTG_TEST_PATTERN_RAMP0_OFFSET, 0);
                }
                break;
                case TEST_PATTERN_COLOR_FORMAT_BPC_10:
                {
                        REG_UPDATE_5(OTG_TEST_PATTERN_PARAMETERS,
                                        OTG_TEST_PATTERN_INC0, inc_base,
                                        OTG_TEST_PATTERN_INC1, inc_base + 2,
                                        OTG_TEST_PATTERN_HRES, 8,
                                        OTG_TEST_PATTERN_VRES, 5,
                                        OTG_TEST_PATTERN_RAMP0_OFFSET, 384 << 6);
                }
                break;
                default:
                break;
                }

                REG_WRITE(OTG_TEST_PATTERN_COLOR, 0);

                /* enable test pattern */
                REG_WRITE(OTG_TEST_PATTERN_CONTROL, 0);

                REG_SET_4(OTG_TEST_PATTERN_CONTROL, 0,
                                OTG_TEST_PATTERN_EN, 1,
                                OTG_TEST_PATTERN_MODE, mode,
                                OTG_TEST_PATTERN_DYNAMIC_RANGE, 0,
                                OTG_TEST_PATTERN_COLOR_FORMAT, bit_depth);
        }
        break;
        case CONTROLLER_DP_TEST_PATTERN_VIDEOMODE:
        {
                REG_WRITE(OTG_TEST_PATTERN_CONTROL, 0);
                REG_WRITE(OTG_TEST_PATTERN_COLOR, 0);
                REG_WRITE(OTG_TEST_PATTERN_PARAMETERS, 0);
        }
        break;
        default:
                break;

        }
}

void optc1_get_crtc_scanoutpos(
        struct timing_generator *optc,
        uint32_t *v_blank_start,
        uint32_t *v_blank_end,
        uint32_t *h_position,
        uint32_t *v_position)
{
        struct optc *optc1 = DCN10TG_FROM_TG(optc);
        struct crtc_position position;

        REG_GET_2(OTG_V_BLANK_START_END,
                        OTG_V_BLANK_START, v_blank_start,
                        OTG_V_BLANK_END, v_blank_end);

        optc1_get_position(optc, &position);

        *h_position = position.horizontal_count;
        *v_position = position.vertical_count;
}

static void optc1_enable_stereo(struct timing_generator *optc,
        const struct dc_crtc_timing *timing, struct crtc_stereo_flags *flags)
{
        struct optc *optc1 = DCN10TG_FROM_TG(optc);

        if (flags) {
                uint32_t stereo_en;
                stereo_en = flags->FRAME_PACKED == 0 ? 1 : 0;

                if (flags->PROGRAM_STEREO)
                        REG_UPDATE_3(OTG_STEREO_CONTROL,
                                OTG_STEREO_EN, stereo_en,
                                OTG_STEREO_SYNC_OUTPUT_LINE_NUM, 0,
                                OTG_STEREO_SYNC_OUTPUT_POLARITY, 0);

                if (flags->PROGRAM_POLARITY)
                        REG_UPDATE(OTG_STEREO_CONTROL,
                                OTG_STEREO_EYE_FLAG_POLARITY,
                                flags->RIGHT_EYE_POLARITY == 0 ? 0 : 1);

                if (flags->DISABLE_STEREO_DP_SYNC)
                        REG_UPDATE(OTG_STEREO_CONTROL,
                                OTG_DISABLE_STEREOSYNC_OUTPUT_FOR_DP, 1);

                if (flags->PROGRAM_STEREO)
                        REG_UPDATE_2(OTG_3D_STRUCTURE_CONTROL,
                                OTG_3D_STRUCTURE_EN, flags->FRAME_PACKED,
                                OTG_3D_STRUCTURE_STEREO_SEL_OVR, flags->FRAME_PACKED);

        }
}

void optc1_program_stereo(struct timing_generator *optc,
        const struct dc_crtc_timing *timing, struct crtc_stereo_flags *flags)
{
        if (flags->PROGRAM_STEREO)
                optc1_enable_stereo(optc, timing, flags);
        else
                optc1_disable_stereo(optc);
}


bool optc1_is_stereo_left_eye(struct timing_generator *optc)
{
        bool ret = false;
        uint32_t left_eye = 0;
        struct optc *optc1 = DCN10TG_FROM_TG(optc);

        REG_GET(OTG_STEREO_STATUS,
                OTG_STEREO_CURRENT_EYE, &left_eye);
        if (left_eye == 1)
                ret = true;
        else
                ret = false;

        return ret;
}

bool optc1_is_matching_timing(struct timing_generator *tg,
                const struct dc_crtc_timing *otg_timing)
{
        struct dc_crtc_timing hw_crtc_timing = {0};
        struct dcn_otg_state s = {0};

        if (tg == NULL || otg_timing == NULL)
                return false;

        optc1_read_otg_state(DCN10TG_FROM_TG(tg), &s);

        hw_crtc_timing.h_total = s.h_total + 1;
        hw_crtc_timing.h_addressable = s.h_total - ((s.h_total - s.h_blank_start) + s.h_blank_end);
        hw_crtc_timing.h_front_porch = s.h_total + 1 - s.h_blank_start;
        hw_crtc_timing.h_sync_width = s.h_sync_a_end - s.h_sync_a_start;

        hw_crtc_timing.v_total = s.v_total + 1;
        hw_crtc_timing.v_addressable = s.v_total - ((s.v_total - s.v_blank_start) + s.v_blank_end);
        hw_crtc_timing.v_front_porch = s.v_total + 1 - s.v_blank_start;
        hw_crtc_timing.v_sync_width = s.v_sync_a_end - s.v_sync_a_start;

        if (otg_timing->h_total != hw_crtc_timing.h_total)
                return false;

        if (otg_timing->h_border_left != hw_crtc_timing.h_border_left)
                return false;

        if (otg_timing->h_addressable != hw_crtc_timing.h_addressable)
                return false;

        if (otg_timing->h_border_right != hw_crtc_timing.h_border_right)
                return false;

        if (otg_timing->h_front_porch != hw_crtc_timing.h_front_porch)
                return false;

        if (otg_timing->h_sync_width != hw_crtc_timing.h_sync_width)
                return false;

        if (otg_timing->v_total != hw_crtc_timing.v_total)
                return false;

        if (otg_timing->v_border_top != hw_crtc_timing.v_border_top)
                return false;

        if (otg_timing->v_addressable != hw_crtc_timing.v_addressable)
                return false;

        if (otg_timing->v_border_bottom != hw_crtc_timing.v_border_bottom)
                return false;

        if (otg_timing->v_sync_width != hw_crtc_timing.v_sync_width)
                return false;

        return true;
}


void optc1_read_otg_state(struct optc *optc1,
                struct dcn_otg_state *s)
{
        REG_GET(OTG_CONTROL,
                        OTG_MASTER_EN, &s->otg_enabled);

        REG_GET_2(OTG_V_BLANK_START_END,
                        OTG_V_BLANK_START, &s->v_blank_start,
                        OTG_V_BLANK_END, &s->v_blank_end);

        REG_GET(OTG_V_SYNC_A_CNTL,
                        OTG_V_SYNC_A_POL, &s->v_sync_a_pol);

        REG_GET(OTG_V_TOTAL,
                        OTG_V_TOTAL, &s->v_total);

        REG_GET(OTG_V_TOTAL_MAX,
                        OTG_V_TOTAL_MAX, &s->v_total_max);

        REG_GET(OTG_V_TOTAL_MIN,
                        OTG_V_TOTAL_MIN, &s->v_total_min);

        REG_GET(OTG_V_TOTAL_CONTROL,
                        OTG_V_TOTAL_MAX_SEL, &s->v_total_max_sel);

        REG_GET(OTG_V_TOTAL_CONTROL,
                        OTG_V_TOTAL_MIN_SEL, &s->v_total_min_sel);

        REG_GET_2(OTG_V_SYNC_A,
                        OTG_V_SYNC_A_START, &s->v_sync_a_start,
                        OTG_V_SYNC_A_END, &s->v_sync_a_end);

        REG_GET_2(OTG_H_BLANK_START_END,
                        OTG_H_BLANK_START, &s->h_blank_start,
                        OTG_H_BLANK_END, &s->h_blank_end);

        REG_GET_2(OTG_H_SYNC_A,
                        OTG_H_SYNC_A_START, &s->h_sync_a_start,
                        OTG_H_SYNC_A_END, &s->h_sync_a_end);

        REG_GET(OTG_H_SYNC_A_CNTL,
                        OTG_H_SYNC_A_POL, &s->h_sync_a_pol);

        REG_GET(OTG_H_TOTAL,
                        OTG_H_TOTAL, &s->h_total);

        REG_GET(OPTC_INPUT_GLOBAL_CONTROL,
                        OPTC_UNDERFLOW_OCCURRED_STATUS, &s->underflow_occurred_status);
}

bool optc1_get_otg_active_size(struct timing_generator *optc,
                uint32_t *otg_active_width,
                uint32_t *otg_active_height)
{
        uint32_t otg_enabled;
        uint32_t v_blank_start;
        uint32_t v_blank_end;
        uint32_t h_blank_start;
        uint32_t h_blank_end;
        struct optc *optc1 = DCN10TG_FROM_TG(optc);


        REG_GET(OTG_CONTROL,
                        OTG_MASTER_EN, &otg_enabled);

        if (otg_enabled == 0)
                return false;

        REG_GET_2(OTG_V_BLANK_START_END,
                        OTG_V_BLANK_START, &v_blank_start,
                        OTG_V_BLANK_END, &v_blank_end);

        REG_GET_2(OTG_H_BLANK_START_END,
                        OTG_H_BLANK_START, &h_blank_start,
                        OTG_H_BLANK_END, &h_blank_end);

        *otg_active_width = v_blank_start - v_blank_end;
        *otg_active_height = h_blank_start - h_blank_end;
        return true;
}

void optc1_clear_optc_underflow(struct timing_generator *optc)
{
        struct optc *optc1 = DCN10TG_FROM_TG(optc);

        REG_UPDATE(OPTC_INPUT_GLOBAL_CONTROL, OPTC_UNDERFLOW_CLEAR, 1);
}

void optc1_tg_init(struct timing_generator *optc)
{
        optc1_set_blank_data_double_buffer(optc, true);
        optc1_clear_optc_underflow(optc);
}

bool optc1_is_tg_enabled(struct timing_generator *optc)
{
        struct optc *optc1 = DCN10TG_FROM_TG(optc);
        uint32_t otg_enabled = 0;

        REG_GET(OTG_CONTROL, OTG_MASTER_EN, &otg_enabled);

        return (otg_enabled != 0);

}

bool optc1_is_optc_underflow_occurred(struct timing_generator *optc)
{
        struct optc *optc1 = DCN10TG_FROM_TG(optc);
        uint32_t underflow_occurred = 0;

        REG_GET(OPTC_INPUT_GLOBAL_CONTROL,
                        OPTC_UNDERFLOW_OCCURRED_STATUS,
                        &underflow_occurred);

        return (underflow_occurred == 1);
}

bool optc1_configure_crc(struct timing_generator *optc,
                          const struct crc_params *params)
{
        struct optc *optc1 = DCN10TG_FROM_TG(optc);

        /* Cannot configure crc on a CRTC that is disabled */
        if (!optc1_is_tg_enabled(optc))
                return false;

        REG_WRITE(OTG_CRC_CNTL, 0);

        if (!params->enable)
                return true;

        /* Program frame boundaries */
        /* Window A x axis start and end. */
        REG_UPDATE_2(OTG_CRC0_WINDOWA_X_CONTROL,
                        OTG_CRC0_WINDOWA_X_START, params->windowa_x_start,
                        OTG_CRC0_WINDOWA_X_END, params->windowa_x_end);

        /* Window A y axis start and end. */
        REG_UPDATE_2(OTG_CRC0_WINDOWA_Y_CONTROL,
                        OTG_CRC0_WINDOWA_Y_START, params->windowa_y_start,
                        OTG_CRC0_WINDOWA_Y_END, params->windowa_y_end);

        /* Window B x axis start and end. */
        REG_UPDATE_2(OTG_CRC0_WINDOWB_X_CONTROL,
                        OTG_CRC0_WINDOWB_X_START, params->windowb_x_start,
                        OTG_CRC0_WINDOWB_X_END, params->windowb_x_end);

        /* Window B y axis start and end. */
        REG_UPDATE_2(OTG_CRC0_WINDOWB_Y_CONTROL,
                        OTG_CRC0_WINDOWB_Y_START, params->windowb_y_start,
                        OTG_CRC0_WINDOWB_Y_END, params->windowb_y_end);

        /* Set crc mode and selection, and enable. Only using CRC0*/
        REG_UPDATE_3(OTG_CRC_CNTL,
                        OTG_CRC_CONT_EN, params->continuous_mode ? 1 : 0,
                        OTG_CRC0_SELECT, params->selection,
                        OTG_CRC_EN, 1);

        return true;
}

bool optc1_get_crc(struct timing_generator *optc,
                    uint32_t *r_cr, uint32_t *g_y, uint32_t *b_cb)
{
        uint32_t field = 0;
        struct optc *optc1 = DCN10TG_FROM_TG(optc);

        REG_GET(OTG_CRC_CNTL, OTG_CRC_EN, &field);

        /* Early return if CRC is not enabled for this CRTC */
        if (!field)
                return false;

        REG_GET_2(OTG_CRC0_DATA_RG,
                        CRC0_R_CR, r_cr,
                        CRC0_G_Y, g_y);

        REG_GET(OTG_CRC0_DATA_B,
                        CRC0_B_CB, b_cb);

        return true;
}

static const struct timing_generator_funcs dcn10_tg_funcs = {
                .validate_timing = optc1_validate_timing,
                .program_timing = optc1_program_timing,
                .setup_vertical_interrupt0 = optc1_setup_vertical_interrupt0,
                .setup_vertical_interrupt1 = optc1_setup_vertical_interrupt1,
                .setup_vertical_interrupt2 = optc1_setup_vertical_interrupt2,
                .program_global_sync = optc1_program_global_sync,
                .enable_crtc = optc1_enable_crtc,
                .disable_crtc = optc1_disable_crtc,
                /* used by enable_timing_synchronization. Not need for FPGA */
                .is_counter_moving = optc1_is_counter_moving,
                .get_position = optc1_get_position,
                .get_frame_count = optc1_get_vblank_counter,
                .get_scanoutpos = optc1_get_crtc_scanoutpos,
                .get_otg_active_size = optc1_get_otg_active_size,
                .is_matching_timing = optc1_is_matching_timing,
                .set_early_control = optc1_set_early_control,
                /* used by enable_timing_synchronization. Not need for FPGA */
                .wait_for_state = optc1_wait_for_state,
                .set_blank = optc1_set_blank,
                .is_blanked = optc1_is_blanked,
                .set_blank_color = optc1_program_blank_color,
                .did_triggered_reset_occur = optc1_did_triggered_reset_occur,
                .enable_reset_trigger = optc1_enable_reset_trigger,
                .enable_crtc_reset = optc1_enable_crtc_reset,
                .disable_reset_trigger = optc1_disable_reset_trigger,
                .lock = optc1_lock,
                .unlock = optc1_unlock,
                .enable_optc_clock = optc1_enable_optc_clock,
                .set_drr = optc1_set_drr,
                .set_static_screen_control = optc1_set_static_screen_control,
                .set_test_pattern = optc1_set_test_pattern,
                .program_stereo = optc1_program_stereo,
                .is_stereo_left_eye = optc1_is_stereo_left_eye,
                .set_blank_data_double_buffer = optc1_set_blank_data_double_buffer,
                .tg_init = optc1_tg_init,
                .is_tg_enabled = optc1_is_tg_enabled,
                .is_optc_underflow_occurred = optc1_is_optc_underflow_occurred,
                .clear_optc_underflow = optc1_clear_optc_underflow,
                .get_crc = optc1_get_crc,
                .configure_crc = optc1_configure_crc,
};

void dcn10_timing_generator_init(struct optc *optc1)
{
        optc1->base.funcs = &dcn10_tg_funcs;

        optc1->max_h_total = optc1->tg_mask->OTG_H_TOTAL + 1;
        optc1->max_v_total = optc1->tg_mask->OTG_V_TOTAL + 1;

        optc1->min_h_blank = 32;
        optc1->min_v_blank = 3;
        optc1->min_v_blank_interlace = 5;
        optc1->min_h_sync_width = 8;
        optc1->min_v_sync_width = 1;
        optc1->comb_opp_id = 0xf;
}

bool optc1_is_two_pixels_per_containter(const struct dc_crtc_timing *timing)
{
        bool two_pix = timing->pixel_encoding == PIXEL_ENCODING_YCBCR420;

        return two_pix;
}