/*
 * 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 "dm_services.h"


#include "dc_types.h"
#include "core_types.h"

#include "include/grph_object_id.h"
#include "include/logger_interface.h"

#include "dce_clock_source.h"

#include "reg_helper.h"

#define REG(reg)\
        (clk_src->regs->reg)

#define CTX \
        clk_src->base.ctx

#define DC_LOGGER_INIT()

#undef FN
#define FN(reg_name, field_name) \
        clk_src->cs_shift->field_name, clk_src->cs_mask->field_name

#define FRACT_FB_DIVIDER_DEC_POINTS_MAX_NUM 6
#define CALC_PLL_CLK_SRC_ERR_TOLERANCE 1
#define MAX_PLL_CALC_ERROR 0xFFFFFFFF

static const struct spread_spectrum_data *get_ss_data_entry(
                struct dce110_clk_src *clk_src,
                enum signal_type signal,
                uint32_t pix_clk_khz)
{

        uint32_t entrys_num;
        uint32_t i;
        struct spread_spectrum_data *ss_parm = NULL;
        struct spread_spectrum_data *ret = NULL;

        switch (signal) {
        case SIGNAL_TYPE_DVI_SINGLE_LINK:
        case SIGNAL_TYPE_DVI_DUAL_LINK:
                ss_parm = clk_src->dvi_ss_params;
                entrys_num = clk_src->dvi_ss_params_cnt;
                break;

        case SIGNAL_TYPE_HDMI_TYPE_A:
                ss_parm = clk_src->hdmi_ss_params;
                entrys_num = clk_src->hdmi_ss_params_cnt;
                break;

        case SIGNAL_TYPE_LVDS:
                ss_parm = clk_src->lvds_ss_params;
                entrys_num = clk_src->lvds_ss_params_cnt;
                break;

        case SIGNAL_TYPE_DISPLAY_PORT:
        case SIGNAL_TYPE_DISPLAY_PORT_MST:
        case SIGNAL_TYPE_EDP:
        case SIGNAL_TYPE_VIRTUAL:
                ss_parm = clk_src->dp_ss_params;
                entrys_num = clk_src->dp_ss_params_cnt;
                break;

        default:
                ss_parm = NULL;
                entrys_num = 0;
                break;
        }

        if (ss_parm == NULL)
                return ret;

        for (i = 0; i < entrys_num; ++i, ++ss_parm) {
                if (ss_parm->freq_range_khz >= pix_clk_khz) {
                        ret = ss_parm;
                        break;
                }
        }

        return ret;
}

/**
* Function: calculate_fb_and_fractional_fb_divider
*
* * DESCRIPTION: Calculates feedback and fractional feedback dividers values
*
*PARAMETERS:
* targetPixelClock             Desired frequency in 10 KHz
* ref_divider                  Reference divider (already known)
* postDivider                  Post Divider (already known)
* feedback_divider_param       Pointer where to store
*                                       calculated feedback divider value
* fract_feedback_divider_param Pointer where to store
*                                       calculated fract feedback divider value
*
*RETURNS:
* It fills the locations pointed by feedback_divider_param
*                                       and fract_feedback_divider_param
* It returns    - true if feedback divider not 0
*               - false should never happen)
*/
static bool calculate_fb_and_fractional_fb_divider(
                struct calc_pll_clock_source *calc_pll_cs,
                uint32_t target_pix_clk_khz,
                uint32_t ref_divider,
                uint32_t post_divider,
                uint32_t *feedback_divider_param,
                uint32_t *fract_feedback_divider_param)
{
        uint64_t feedback_divider;

        feedback_divider =
                (uint64_t)target_pix_clk_khz * ref_divider * post_divider;
        feedback_divider *= 10;
        /* additional factor, since we divide by 10 afterwards */
        feedback_divider *= (uint64_t)(calc_pll_cs->fract_fb_divider_factor);
        feedback_divider = div_u64(feedback_divider, calc_pll_cs->ref_freq_khz);

/*Round to the number of precision
 * The following code replace the old code (ullfeedbackDivider + 5)/10
 * for example if the difference between the number
 * of fractional feedback decimal point and the fractional FB Divider precision
 * is 2 then the equation becomes (ullfeedbackDivider + 5*100) / (10*100))*/

        feedback_divider += 5ULL *
                            calc_pll_cs->fract_fb_divider_precision_factor;
        feedback_divider =
                div_u64(feedback_divider,
                        calc_pll_cs->fract_fb_divider_precision_factor * 10);
        feedback_divider *= (uint64_t)
                        (calc_pll_cs->fract_fb_divider_precision_factor);

        *feedback_divider_param =
                div_u64_rem(
                        feedback_divider,
                        calc_pll_cs->fract_fb_divider_factor,
                        fract_feedback_divider_param);

        if (*feedback_divider_param != 0)
                return true;
        return false;
}

/**
*calc_fb_divider_checking_tolerance
*
*DESCRIPTION: Calculates Feedback and Fractional Feedback divider values
*               for passed Reference and Post divider, checking for tolerance.
*PARAMETERS:
* pll_settings          Pointer to structure
* ref_divider           Reference divider (already known)
* postDivider           Post Divider (already known)
* tolerance             Tolerance for Calculated Pixel Clock to be within
*
*RETURNS:
* It fills the PLLSettings structure with PLL Dividers values
* if calculated values are within required tolerance
* It returns    - true if eror is within tolerance
*               - false if eror is not within tolerance
*/
static bool calc_fb_divider_checking_tolerance(
                struct calc_pll_clock_source *calc_pll_cs,
                struct pll_settings *pll_settings,
                uint32_t ref_divider,
                uint32_t post_divider,
                uint32_t tolerance)
{
        uint32_t feedback_divider;
        uint32_t fract_feedback_divider;
        uint32_t actual_calculated_clock_khz;
        uint32_t abs_err;
        uint64_t actual_calc_clk_khz;

        calculate_fb_and_fractional_fb_divider(
                        calc_pll_cs,
                        pll_settings->adjusted_pix_clk,
                        ref_divider,
                        post_divider,
                        &feedback_divider,
                        &fract_feedback_divider);

        /*Actual calculated value*/
        actual_calc_clk_khz = (uint64_t)feedback_divider *
                                        calc_pll_cs->fract_fb_divider_factor +
                                                        fract_feedback_divider;
        actual_calc_clk_khz *= calc_pll_cs->ref_freq_khz;
        actual_calc_clk_khz =
                div_u64(actual_calc_clk_khz,
                        ref_divider * post_divider *
                                calc_pll_cs->fract_fb_divider_factor);

        actual_calculated_clock_khz = (uint32_t)(actual_calc_clk_khz);

        abs_err = (actual_calculated_clock_khz >
                                        pll_settings->adjusted_pix_clk)
                        ? actual_calculated_clock_khz -
                                        pll_settings->adjusted_pix_clk
                        : pll_settings->adjusted_pix_clk -
                                                actual_calculated_clock_khz;

        if (abs_err <= tolerance) {
                /*found good values*/
                pll_settings->reference_freq = calc_pll_cs->ref_freq_khz;
                pll_settings->reference_divider = ref_divider;
                pll_settings->feedback_divider = feedback_divider;
                pll_settings->fract_feedback_divider = fract_feedback_divider;
                pll_settings->pix_clk_post_divider = post_divider;
                pll_settings->calculated_pix_clk =
                        actual_calculated_clock_khz;
                pll_settings->vco_freq =
                        actual_calculated_clock_khz * post_divider;
                return true;
        }
        return false;
}

static bool calc_pll_dividers_in_range(
                struct calc_pll_clock_source *calc_pll_cs,
                struct pll_settings *pll_settings,
                uint32_t min_ref_divider,
                uint32_t max_ref_divider,
                uint32_t min_post_divider,
                uint32_t max_post_divider,
                uint32_t err_tolerance)
{
        uint32_t ref_divider;
        uint32_t post_divider;
        uint32_t tolerance;

/* This is err_tolerance / 10000 = 0.0025 - acceptable error of 0.25%
 * This is errorTolerance / 10000 = 0.0001 - acceptable error of 0.01%*/
        tolerance = (pll_settings->adjusted_pix_clk * err_tolerance) /
                                                                        10000;
        if (tolerance < CALC_PLL_CLK_SRC_ERR_TOLERANCE)
                tolerance = CALC_PLL_CLK_SRC_ERR_TOLERANCE;

        for (
                        post_divider = max_post_divider;
                        post_divider >= min_post_divider;
                        --post_divider) {
                for (
                                ref_divider = min_ref_divider;
                                ref_divider <= max_ref_divider;
                                ++ref_divider) {
                        if (calc_fb_divider_checking_tolerance(
                                        calc_pll_cs,
                                        pll_settings,
                                        ref_divider,
                                        post_divider,
                                        tolerance)) {
                                return true;
                        }
                }
        }

        return false;
}

static uint32_t calculate_pixel_clock_pll_dividers(
                struct calc_pll_clock_source *calc_pll_cs,
                struct pll_settings *pll_settings)
{
        uint32_t err_tolerance;
        uint32_t min_post_divider;
        uint32_t max_post_divider;
        uint32_t min_ref_divider;
        uint32_t max_ref_divider;

        if (pll_settings->adjusted_pix_clk == 0) {
                DC_LOG_ERROR(
                        "%s Bad requested pixel clock", __func__);
                return MAX_PLL_CALC_ERROR;
        }

/* 1) Find Post divider ranges */
        if (pll_settings->pix_clk_post_divider) {
                min_post_divider = pll_settings->pix_clk_post_divider;
                max_post_divider = pll_settings->pix_clk_post_divider;
        } else {
                min_post_divider = calc_pll_cs->min_pix_clock_pll_post_divider;
                if (min_post_divider * pll_settings->adjusted_pix_clk <
                                                calc_pll_cs->min_vco_khz) {
                        min_post_divider = calc_pll_cs->min_vco_khz /
                                        pll_settings->adjusted_pix_clk;
                        if ((min_post_divider *
                                        pll_settings->adjusted_pix_clk) <
                                                calc_pll_cs->min_vco_khz)
                                min_post_divider++;
                }

                max_post_divider = calc_pll_cs->max_pix_clock_pll_post_divider;
                if (max_post_divider * pll_settings->adjusted_pix_clk
                                > calc_pll_cs->max_vco_khz)
                        max_post_divider = calc_pll_cs->max_vco_khz /
                                        pll_settings->adjusted_pix_clk;
        }

/* 2) Find Reference divider ranges
 * When SS is enabled, or for Display Port even without SS,
 * pll_settings->referenceDivider is not zero.
 * So calculate PPLL FB and fractional FB divider
 * using the passed reference divider*/

        if (pll_settings->reference_divider) {
                min_ref_divider = pll_settings->reference_divider;
                max_ref_divider = pll_settings->reference_divider;
        } else {
                min_ref_divider = ((calc_pll_cs->ref_freq_khz
                                / calc_pll_cs->max_pll_input_freq_khz)
                                > calc_pll_cs->min_pll_ref_divider)
                        ? calc_pll_cs->ref_freq_khz
                                        / calc_pll_cs->max_pll_input_freq_khz
                        : calc_pll_cs->min_pll_ref_divider;

                max_ref_divider = ((calc_pll_cs->ref_freq_khz
                                / calc_pll_cs->min_pll_input_freq_khz)
                                < calc_pll_cs->max_pll_ref_divider)
                        ? calc_pll_cs->ref_freq_khz /
                                        calc_pll_cs->min_pll_input_freq_khz
                        : calc_pll_cs->max_pll_ref_divider;
        }

/* If some parameters are invalid we could have scenario when  "min">"max"
 * which produced endless loop later.
 * We should investigate why we get the wrong parameters.
 * But to follow the similar logic when "adjustedPixelClock" is set to be 0
 * it is better to return here than cause system hang/watchdog timeout later.
 *  ## SVS Wed 15 Jul 2009 */

        if (min_post_divider > max_post_divider) {
                DC_LOG_ERROR(
                        "%s Post divider range is invalid", __func__);
                return MAX_PLL_CALC_ERROR;
        }

        if (min_ref_divider > max_ref_divider) {
                DC_LOG_ERROR(
                        "%s Reference divider range is invalid", __func__);
                return MAX_PLL_CALC_ERROR;
        }

/* 3) Try to find PLL dividers given ranges
 * starting with minimal error tolerance.
 * Increase error tolerance until PLL dividers found*/
        err_tolerance = MAX_PLL_CALC_ERROR;

        while (!calc_pll_dividers_in_range(
                        calc_pll_cs,
                        pll_settings,
                        min_ref_divider,
                        max_ref_divider,
                        min_post_divider,
                        max_post_divider,
                        err_tolerance))
                err_tolerance += (err_tolerance > 10)
                                ? (err_tolerance / 10)
                                : 1;

        return err_tolerance;
}

static bool pll_adjust_pix_clk(
                struct dce110_clk_src *clk_src,
                struct pixel_clk_params *pix_clk_params,
                struct pll_settings *pll_settings)
{
        uint32_t actual_pix_clk_khz = 0;
        uint32_t requested_clk_khz = 0;
        struct bp_adjust_pixel_clock_parameters bp_adjust_pixel_clock_params = {
                                                        0 };
        enum bp_result bp_result;
        switch (pix_clk_params->signal_type) {
        case SIGNAL_TYPE_HDMI_TYPE_A: {
                requested_clk_khz = pix_clk_params->requested_pix_clk;
                if (pix_clk_params->pixel_encoding != PIXEL_ENCODING_YCBCR422) {
                        switch (pix_clk_params->color_depth) {
                        case COLOR_DEPTH_101010:
                                requested_clk_khz = (requested_clk_khz * 5) >> 2;
                                break; /* x1.25*/
                        case COLOR_DEPTH_121212:
                                requested_clk_khz = (requested_clk_khz * 6) >> 2;
                                break; /* x1.5*/
                        case COLOR_DEPTH_161616:
                                requested_clk_khz = requested_clk_khz * 2;
                                break; /* x2.0*/
                        default:
                                break;
                        }
                }
                actual_pix_clk_khz = requested_clk_khz;
        }
                break;

        case SIGNAL_TYPE_DISPLAY_PORT:
        case SIGNAL_TYPE_DISPLAY_PORT_MST:
        case SIGNAL_TYPE_EDP:
                requested_clk_khz = pix_clk_params->requested_sym_clk;
                actual_pix_clk_khz = pix_clk_params->requested_pix_clk;
                break;

        default:
                requested_clk_khz = pix_clk_params->requested_pix_clk;
                actual_pix_clk_khz = pix_clk_params->requested_pix_clk;
                break;
        }

        bp_adjust_pixel_clock_params.pixel_clock = requested_clk_khz;
        bp_adjust_pixel_clock_params.
                encoder_object_id = pix_clk_params->encoder_object_id;
        bp_adjust_pixel_clock_params.signal_type = pix_clk_params->signal_type;
        bp_adjust_pixel_clock_params.
                ss_enable = pix_clk_params->flags.ENABLE_SS;
        bp_result = clk_src->bios->funcs->adjust_pixel_clock(
                        clk_src->bios, &bp_adjust_pixel_clock_params);
        if (bp_result == BP_RESULT_OK) {
                pll_settings->actual_pix_clk = actual_pix_clk_khz;
                pll_settings->adjusted_pix_clk =
                        bp_adjust_pixel_clock_params.adjusted_pixel_clock;
                pll_settings->reference_divider =
                        bp_adjust_pixel_clock_params.reference_divider;
                pll_settings->pix_clk_post_divider =
                        bp_adjust_pixel_clock_params.pixel_clock_post_divider;

                return true;
        }

        return false;
}

/**
 * Calculate PLL Dividers for given Clock Value.
 * First will call VBIOS Adjust Exec table to check if requested Pixel clock
 * will be Adjusted based on usage.
 * Then it will calculate PLL Dividers for this Adjusted clock using preferred
 * method (Maximum VCO frequency).
 *
 * \return
 *     Calculation error in units of 0.01%
 */

static uint32_t dce110_get_pix_clk_dividers_helper (
                struct dce110_clk_src *clk_src,
                struct pll_settings *pll_settings,
                struct pixel_clk_params *pix_clk_params)
{
        uint32_t field = 0;
        uint32_t pll_calc_error = MAX_PLL_CALC_ERROR;
        DC_LOGGER_INIT();
        /* Check if reference clock is external (not pcie/xtalin)
        * HW Dce80 spec:
        * 00 - PCIE_REFCLK, 01 - XTALIN,    02 - GENERICA,    03 - GENERICB
        * 04 - HSYNCA,      05 - GENLK_CLK, 06 - PCIE_REFCLK, 07 - DVOCLK0 */
        REG_GET(PLL_CNTL, PLL_REF_DIV_SRC, &field);
        pll_settings->use_external_clk = (field > 1);

        /* VBIOS by default enables DP SS (spread on IDCLK) for DCE 8.0 always
         * (we do not care any more from SI for some older DP Sink which
         * does not report SS support, no known issues) */
        if ((pix_clk_params->flags.ENABLE_SS) ||
                        (dc_is_dp_signal(pix_clk_params->signal_type))) {

                const struct spread_spectrum_data *ss_data = get_ss_data_entry(
                                        clk_src,
                                        pix_clk_params->signal_type,
                                        pll_settings->adjusted_pix_clk);

                if (NULL != ss_data)
                        pll_settings->ss_percentage = ss_data->percentage;
        }

        /* Check VBIOS AdjustPixelClock Exec table */
        if (!pll_adjust_pix_clk(clk_src, pix_clk_params, pll_settings)) {
                /* Should never happen, ASSERT and fill up values to be able
                 * to continue. */
                DC_LOG_ERROR(
                        "%s: Failed to adjust pixel clock!!", __func__);
                pll_settings->actual_pix_clk =
                                pix_clk_params->requested_pix_clk;
                pll_settings->adjusted_pix_clk =
                                pix_clk_params->requested_pix_clk;

                if (dc_is_dp_signal(pix_clk_params->signal_type))
                        pll_settings->adjusted_pix_clk = 100000;
        }

        /* Calculate Dividers */
        if (pix_clk_params->signal_type == SIGNAL_TYPE_HDMI_TYPE_A)
                /*Calculate Dividers by HDMI object, no SS case or SS case */
                pll_calc_error =
                        calculate_pixel_clock_pll_dividers(
                                        &clk_src->calc_pll_hdmi,
                                        pll_settings);
        else
                /*Calculate Dividers by default object, no SS case or SS case */
                pll_calc_error =
                        calculate_pixel_clock_pll_dividers(
                                        &clk_src->calc_pll,
                                        pll_settings);

        return pll_calc_error;
}

static void dce112_get_pix_clk_dividers_helper (
                struct dce110_clk_src *clk_src,
                struct pll_settings *pll_settings,
                struct pixel_clk_params *pix_clk_params)
{
        uint32_t actualPixelClockInKHz;

        actualPixelClockInKHz = pix_clk_params->requested_pix_clk;
        /* Calculate Dividers */
        if (pix_clk_params->signal_type == SIGNAL_TYPE_HDMI_TYPE_A) {
                switch (pix_clk_params->color_depth) {
                case COLOR_DEPTH_101010:
                        actualPixelClockInKHz = (actualPixelClockInKHz * 5) >> 2;
                        break;
                case COLOR_DEPTH_121212:
                        actualPixelClockInKHz = (actualPixelClockInKHz * 6) >> 2;
                        break;
                case COLOR_DEPTH_161616:
                        actualPixelClockInKHz = actualPixelClockInKHz * 2;
                        break;
                default:
                        break;
                }
        }
        pll_settings->actual_pix_clk = actualPixelClockInKHz;
        pll_settings->adjusted_pix_clk = actualPixelClockInKHz;
        pll_settings->calculated_pix_clk = pix_clk_params->requested_pix_clk;
}

static uint32_t dce110_get_pix_clk_dividers(
                struct clock_source *cs,
                struct pixel_clk_params *pix_clk_params,
                struct pll_settings *pll_settings)
{
        struct dce110_clk_src *clk_src = TO_DCE110_CLK_SRC(cs);
        uint32_t pll_calc_error = MAX_PLL_CALC_ERROR;
        DC_LOGGER_INIT();

        if (pix_clk_params == NULL || pll_settings == NULL
                        || pix_clk_params->requested_pix_clk == 0) {
                DC_LOG_ERROR(
                        "%s: Invalid parameters!!\n", __func__);
                return pll_calc_error;
        }

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

        if (cs->id == CLOCK_SOURCE_ID_DP_DTO ||
                        cs->id == CLOCK_SOURCE_ID_EXTERNAL) {
                pll_settings->adjusted_pix_clk = clk_src->ext_clk_khz;
                pll_settings->calculated_pix_clk = clk_src->ext_clk_khz;
                pll_settings->actual_pix_clk =
                                        pix_clk_params->requested_pix_clk;
                return 0;
        }

        pll_calc_error = dce110_get_pix_clk_dividers_helper(clk_src,
                        pll_settings, pix_clk_params);

        return pll_calc_error;
}

static uint32_t dce112_get_pix_clk_dividers(
                struct clock_source *cs,
                struct pixel_clk_params *pix_clk_params,
                struct pll_settings *pll_settings)
{
        struct dce110_clk_src *clk_src = TO_DCE110_CLK_SRC(cs);
        DC_LOGGER_INIT();

        if (pix_clk_params == NULL || pll_settings == NULL
                        || pix_clk_params->requested_pix_clk == 0) {
                DC_LOG_ERROR(
                        "%s: Invalid parameters!!\n", __func__);
                return -1;
        }

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

        if (cs->id == CLOCK_SOURCE_ID_DP_DTO ||
                        cs->id == CLOCK_SOURCE_ID_EXTERNAL) {
                pll_settings->adjusted_pix_clk = clk_src->ext_clk_khz;
                pll_settings->calculated_pix_clk = clk_src->ext_clk_khz;
                pll_settings->actual_pix_clk =
                                        pix_clk_params->requested_pix_clk;
                return -1;
        }

        dce112_get_pix_clk_dividers_helper(clk_src,
                        pll_settings, pix_clk_params);

        return 0;
}

static bool disable_spread_spectrum(struct dce110_clk_src *clk_src)
{
        enum bp_result result;
        struct bp_spread_spectrum_parameters bp_ss_params = {0};

        bp_ss_params.pll_id = clk_src->base.id;

        /*Call ASICControl to process ATOMBIOS Exec table*/
        result = clk_src->bios->funcs->enable_spread_spectrum_on_ppll(
                        clk_src->bios,
                        &bp_ss_params,
                        false);

        return result == BP_RESULT_OK;
}

static bool calculate_ss(
                const struct pll_settings *pll_settings,
                const struct spread_spectrum_data *ss_data,
                struct delta_sigma_data *ds_data)
{
        struct fixed31_32 fb_div;
        struct fixed31_32 ss_amount;
        struct fixed31_32 ss_nslip_amount;
        struct fixed31_32 ss_ds_frac_amount;
        struct fixed31_32 ss_step_size;
        struct fixed31_32 modulation_time;

        if (ds_data == NULL)
                return false;
        if (ss_data == NULL)
                return false;
        if (ss_data->percentage == 0)
                return false;
        if (pll_settings == NULL)
                return false;

        memset(ds_data, 0, sizeof(struct delta_sigma_data));

        /* compute SS_AMOUNT_FBDIV & SS_AMOUNT_NFRAC_SLIP & SS_AMOUNT_DSFRAC*/
        /* 6 decimal point support in fractional feedback divider */
        fb_div  = dc_fixpt_from_fraction(
                pll_settings->fract_feedback_divider, 1000000);
        fb_div = dc_fixpt_add_int(fb_div, pll_settings->feedback_divider);

        ds_data->ds_frac_amount = 0;
        /*spreadSpectrumPercentage is in the unit of .01%,
         * so have to divided by 100 * 100*/
        ss_amount = dc_fixpt_mul(
                fb_div, dc_fixpt_from_fraction(ss_data->percentage,
                                        100 * ss_data->percentage_divider));
        ds_data->feedback_amount = dc_fixpt_floor(ss_amount);

        ss_nslip_amount = dc_fixpt_sub(ss_amount,
                dc_fixpt_from_int(ds_data->feedback_amount));
        ss_nslip_amount = dc_fixpt_mul_int(ss_nslip_amount, 10);
        ds_data->nfrac_amount = dc_fixpt_floor(ss_nslip_amount);

        ss_ds_frac_amount = dc_fixpt_sub(ss_nslip_amount,
                dc_fixpt_from_int(ds_data->nfrac_amount));
        ss_ds_frac_amount = dc_fixpt_mul_int(ss_ds_frac_amount, 65536);
        ds_data->ds_frac_amount = dc_fixpt_floor(ss_ds_frac_amount);

        /* compute SS_STEP_SIZE_DSFRAC */
        modulation_time = dc_fixpt_from_fraction(
                pll_settings->reference_freq * 1000,
                pll_settings->reference_divider * ss_data->modulation_freq_hz);

        if (ss_data->flags.CENTER_SPREAD)
                modulation_time = dc_fixpt_div_int(modulation_time, 4);
        else
                modulation_time = dc_fixpt_div_int(modulation_time, 2);

        ss_step_size = dc_fixpt_div(ss_amount, modulation_time);
        /* SS_STEP_SIZE_DSFRAC_DEC = Int(SS_STEP_SIZE * 2 ^ 16 * 10)*/
        ss_step_size = dc_fixpt_mul_int(ss_step_size, 65536 * 10);
        ds_data->ds_frac_size =  dc_fixpt_floor(ss_step_size);

        return true;
}

static bool enable_spread_spectrum(
                struct dce110_clk_src *clk_src,
                enum signal_type signal, struct pll_settings *pll_settings)
{
        struct bp_spread_spectrum_parameters bp_params = {0};
        struct delta_sigma_data d_s_data;
        const struct spread_spectrum_data *ss_data = NULL;

        ss_data = get_ss_data_entry(
                        clk_src,
                        signal,
                        pll_settings->calculated_pix_clk);

/* Pixel clock PLL has been programmed to generate desired pixel clock,
 * now enable SS on pixel clock */
/* TODO is it OK to return true not doing anything ??*/
        if (ss_data != NULL && pll_settings->ss_percentage != 0) {
                if (calculate_ss(pll_settings, ss_data, &d_s_data)) {
                        bp_params.ds.feedback_amount =
                                        d_s_data.feedback_amount;
                        bp_params.ds.nfrac_amount =
                                        d_s_data.nfrac_amount;
                        bp_params.ds.ds_frac_size = d_s_data.ds_frac_size;
                        bp_params.ds_frac_amount =
                                        d_s_data.ds_frac_amount;
                        bp_params.flags.DS_TYPE = 1;
                        bp_params.pll_id = clk_src->base.id;
                        bp_params.percentage = ss_data->percentage;
                        if (ss_data->flags.CENTER_SPREAD)
                                bp_params.flags.CENTER_SPREAD = 1;
                        if (ss_data->flags.EXTERNAL_SS)
                                bp_params.flags.EXTERNAL_SS = 1;

                        if (BP_RESULT_OK !=
                                clk_src->bios->funcs->
                                        enable_spread_spectrum_on_ppll(
                                                        clk_src->bios,
                                                        &bp_params,
                                                        true))
                                return false;
                } else
                        return false;
        }
        return true;
}

static void dce110_program_pixel_clk_resync(
                struct dce110_clk_src *clk_src,
                enum signal_type signal_type,
                enum dc_color_depth colordepth)
{
        REG_UPDATE(RESYNC_CNTL,
                        DCCG_DEEP_COLOR_CNTL1, 0);
        /*
         24 bit mode: TMDS clock = 1.0 x pixel clock  (1:1)
         30 bit mode: TMDS clock = 1.25 x pixel clock (5:4)
         36 bit mode: TMDS clock = 1.5 x pixel clock  (3:2)
         48 bit mode: TMDS clock = 2 x pixel clock    (2:1)
         */
        if (signal_type != SIGNAL_TYPE_HDMI_TYPE_A)
                return;

        switch (colordepth) {
        case COLOR_DEPTH_888:
                REG_UPDATE(RESYNC_CNTL,
                                DCCG_DEEP_COLOR_CNTL1, 0);
                break;
        case COLOR_DEPTH_101010:
                REG_UPDATE(RESYNC_CNTL,
                                DCCG_DEEP_COLOR_CNTL1, 1);
                break;
        case COLOR_DEPTH_121212:
                REG_UPDATE(RESYNC_CNTL,
                                DCCG_DEEP_COLOR_CNTL1, 2);
                break;
        case COLOR_DEPTH_161616:
                REG_UPDATE(RESYNC_CNTL,
                                DCCG_DEEP_COLOR_CNTL1, 3);
                break;
        default:
                break;
        }
}

static void dce112_program_pixel_clk_resync(
                struct dce110_clk_src *clk_src,
                enum signal_type signal_type,
                enum dc_color_depth colordepth,
                bool enable_ycbcr420)
{
        uint32_t deep_color_cntl = 0;
        uint32_t double_rate_enable = 0;

        /*
         24 bit mode: TMDS clock = 1.0 x pixel clock  (1:1)
         30 bit mode: TMDS clock = 1.25 x pixel clock (5:4)
         36 bit mode: TMDS clock = 1.5 x pixel clock  (3:2)
         48 bit mode: TMDS clock = 2 x pixel clock    (2:1)
         */
        if (signal_type == SIGNAL_TYPE_HDMI_TYPE_A) {
                double_rate_enable = enable_ycbcr420 ? 1 : 0;

                switch (colordepth) {
                case COLOR_DEPTH_888:
                        deep_color_cntl = 0;
                        break;
                case COLOR_DEPTH_101010:
                        deep_color_cntl = 1;
                        break;
                case COLOR_DEPTH_121212:
                        deep_color_cntl = 2;
                        break;
                case COLOR_DEPTH_161616:
                        deep_color_cntl = 3;
                        break;
                default:
                        break;
                }
        }

        if (clk_src->cs_mask->PHYPLLA_PIXCLK_DOUBLE_RATE_ENABLE)
                REG_UPDATE_2(PIXCLK_RESYNC_CNTL,
                                PHYPLLA_DCCG_DEEP_COLOR_CNTL, deep_color_cntl,
                                PHYPLLA_PIXCLK_DOUBLE_RATE_ENABLE, double_rate_enable);
        else
                REG_UPDATE(PIXCLK_RESYNC_CNTL,
                                PHYPLLA_DCCG_DEEP_COLOR_CNTL, deep_color_cntl);

}

static bool dce110_program_pix_clk(
                struct clock_source *clock_source,
                struct pixel_clk_params *pix_clk_params,
                struct pll_settings *pll_settings)
{
        struct dce110_clk_src *clk_src = TO_DCE110_CLK_SRC(clock_source);
        struct bp_pixel_clock_parameters bp_pc_params = {0};

        /* First disable SS
         * ATOMBIOS will enable by default SS on PLL for DP,
         * do not disable it here
         */
        if (clock_source->id != CLOCK_SOURCE_ID_EXTERNAL &&
                        !dc_is_dp_signal(pix_clk_params->signal_type) &&
                        clock_source->ctx->dce_version <= DCE_VERSION_11_0)
                disable_spread_spectrum(clk_src);

        /*ATOMBIOS expects pixel rate adjusted by deep color ratio)*/
        bp_pc_params.controller_id = pix_clk_params->controller_id;
        bp_pc_params.pll_id = clock_source->id;
        bp_pc_params.target_pixel_clock = pll_settings->actual_pix_clk;
        bp_pc_params.encoder_object_id = pix_clk_params->encoder_object_id;
        bp_pc_params.signal_type = pix_clk_params->signal_type;

        bp_pc_params.reference_divider = pll_settings->reference_divider;
        bp_pc_params.feedback_divider = pll_settings->feedback_divider;
        bp_pc_params.fractional_feedback_divider =
                        pll_settings->fract_feedback_divider;
        bp_pc_params.pixel_clock_post_divider =
                        pll_settings->pix_clk_post_divider;
        bp_pc_params.flags.SET_EXTERNAL_REF_DIV_SRC =
                                        pll_settings->use_external_clk;

        if (clk_src->bios->funcs->set_pixel_clock(
                        clk_src->bios, &bp_pc_params) != BP_RESULT_OK)
                return false;
        /* Enable SS
         * ATOMBIOS will enable by default SS for DP on PLL ( DP ID clock),
         * based on HW display PLL team, SS control settings should be programmed
         * during PLL Reset, but they do not have effect
         * until SS_EN is asserted.*/
        if (clock_source->id != CLOCK_SOURCE_ID_EXTERNAL
                        && !dc_is_dp_signal(pix_clk_params->signal_type)) {

                if (pix_clk_params->flags.ENABLE_SS)
                        if (!enable_spread_spectrum(clk_src,
                                                        pix_clk_params->signal_type,
                                                        pll_settings))
                                return false;

                /* Resync deep color DTO */
                dce110_program_pixel_clk_resync(clk_src,
                                        pix_clk_params->signal_type,
                                        pix_clk_params->color_depth);
        }

        return true;
}

static bool dce112_program_pix_clk(
                struct clock_source *clock_source,
                struct pixel_clk_params *pix_clk_params,
                struct pll_settings *pll_settings)
{
        struct dce110_clk_src *clk_src = TO_DCE110_CLK_SRC(clock_source);
        struct bp_pixel_clock_parameters bp_pc_params = {0};

#if defined(CONFIG_DRM_AMD_DC_DCN1_0)
        if (IS_FPGA_MAXIMUS_DC(clock_source->ctx->dce_environment)) {
                unsigned int inst = pix_clk_params->controller_id - CONTROLLER_ID_D0;
                unsigned dp_dto_ref_kHz = 700000;
                unsigned clock_kHz = pll_settings->actual_pix_clk;

                /* Set DTO values: phase = target clock, modulo = reference clock */
                REG_WRITE(PHASE[inst], clock_kHz);
                REG_WRITE(MODULO[inst], dp_dto_ref_kHz);

                /* Enable DTO */
                REG_UPDATE(PIXEL_RATE_CNTL[inst], DP_DTO0_ENABLE, 1);
                return true;
        }
#endif
        /* First disable SS
         * ATOMBIOS will enable by default SS on PLL for DP,
         * do not disable it here
         */
        if (clock_source->id != CLOCK_SOURCE_ID_EXTERNAL &&
                        !dc_is_dp_signal(pix_clk_params->signal_type) &&
                        clock_source->ctx->dce_version <= DCE_VERSION_11_0)
                disable_spread_spectrum(clk_src);

        /*ATOMBIOS expects pixel rate adjusted by deep color ratio)*/
        bp_pc_params.controller_id = pix_clk_params->controller_id;
        bp_pc_params.pll_id = clock_source->id;
        bp_pc_params.target_pixel_clock = pll_settings->actual_pix_clk;
        bp_pc_params.encoder_object_id = pix_clk_params->encoder_object_id;
        bp_pc_params.signal_type = pix_clk_params->signal_type;

        if (clock_source->id != CLOCK_SOURCE_ID_DP_DTO) {
                bp_pc_params.flags.SET_GENLOCK_REF_DIV_SRC =
                                                pll_settings->use_external_clk;
                bp_pc_params.flags.SET_XTALIN_REF_SRC =
                                                !pll_settings->use_external_clk;
                if (pix_clk_params->flags.SUPPORT_YCBCR420) {
                        bp_pc_params.flags.SUPPORT_YUV_420 = 1;
                }
        }
        if (clk_src->bios->funcs->set_pixel_clock(
                        clk_src->bios, &bp_pc_params) != BP_RESULT_OK)
                return false;
        /* Resync deep color DTO */
        if (clock_source->id != CLOCK_SOURCE_ID_DP_DTO)
                dce112_program_pixel_clk_resync(clk_src,
                                        pix_clk_params->signal_type,
                                        pix_clk_params->color_depth,
                                        pix_clk_params->flags.SUPPORT_YCBCR420);

        return true;
}


static bool dce110_clock_source_power_down(
                struct clock_source *clk_src)
{
        struct dce110_clk_src *dce110_clk_src = TO_DCE110_CLK_SRC(clk_src);
        enum bp_result bp_result;
        struct bp_pixel_clock_parameters bp_pixel_clock_params = {0};

        if (clk_src->dp_clk_src)
                return true;

        /* If Pixel Clock is 0 it means Power Down Pll*/
        bp_pixel_clock_params.controller_id = CONTROLLER_ID_UNDEFINED;
        bp_pixel_clock_params.pll_id = clk_src->id;
        bp_pixel_clock_params.flags.FORCE_PROGRAMMING_OF_PLL = 1;

        /*Call ASICControl to process ATOMBIOS Exec table*/
        bp_result = dce110_clk_src->bios->funcs->set_pixel_clock(
                        dce110_clk_src->bios,
                        &bp_pixel_clock_params);

        return bp_result == BP_RESULT_OK;
}

/*****************************************/
/* Constructor                           */
/*****************************************/

static const struct clock_source_funcs dce112_clk_src_funcs = {
        .cs_power_down = dce110_clock_source_power_down,
        .program_pix_clk = dce112_program_pix_clk,
        .get_pix_clk_dividers = dce112_get_pix_clk_dividers
};
static const struct clock_source_funcs dce110_clk_src_funcs = {
        .cs_power_down = dce110_clock_source_power_down,
        .program_pix_clk = dce110_program_pix_clk,
        .get_pix_clk_dividers = dce110_get_pix_clk_dividers
};


static void get_ss_info_from_atombios(
                struct dce110_clk_src *clk_src,
                enum as_signal_type as_signal,
                struct spread_spectrum_data *spread_spectrum_data[],
                uint32_t *ss_entries_num)
{
        enum bp_result bp_result = BP_RESULT_FAILURE;
        struct spread_spectrum_info *ss_info;
        struct spread_spectrum_data *ss_data;
        struct spread_spectrum_info *ss_info_cur;
        struct spread_spectrum_data *ss_data_cur;
        uint32_t i;
        DC_LOGGER_INIT();
        if (ss_entries_num == NULL) {
                DC_LOG_SYNC(
                        "Invalid entry !!!\n");
                return;
        }
        if (spread_spectrum_data == NULL) {
                DC_LOG_SYNC(
                        "Invalid array pointer!!!\n");
                return;
        }

        spread_spectrum_data[0] = NULL;
        *ss_entries_num = 0;

        *ss_entries_num = clk_src->bios->funcs->get_ss_entry_number(
                        clk_src->bios,
                        as_signal);

        if (*ss_entries_num == 0)
                return;

        ss_info = kcalloc(*ss_entries_num,
                          sizeof(struct spread_spectrum_info),
                          GFP_KERNEL);
        ss_info_cur = ss_info;
        if (ss_info == NULL)
                return;

        ss_data = kcalloc(*ss_entries_num,
                          sizeof(struct spread_spectrum_data),
                          GFP_KERNEL);
        if (ss_data == NULL)
                goto out_free_info;

        for (i = 0, ss_info_cur = ss_info;
                i < (*ss_entries_num);
                ++i, ++ss_info_cur) {

                bp_result = clk_src->bios->funcs->get_spread_spectrum_info(
                                clk_src->bios,
                                as_signal,
                                i,
                                ss_info_cur);

                if (bp_result != BP_RESULT_OK)
                        goto out_free_data;
        }

        for (i = 0, ss_info_cur = ss_info, ss_data_cur = ss_data;
                i < (*ss_entries_num);
                ++i, ++ss_info_cur, ++ss_data_cur) {

                if (ss_info_cur->type.STEP_AND_DELAY_INFO != false) {
                        DC_LOG_SYNC(
                                "Invalid ATOMBIOS SS Table!!!\n");
                        goto out_free_data;
                }

                /* for HDMI check SS percentage,
                 * if it is > 6 (0.06%), the ATOMBIOS table info is invalid*/
                if (as_signal == AS_SIGNAL_TYPE_HDMI
                                && ss_info_cur->spread_spectrum_percentage > 6){
                        /* invalid input, do nothing */
                        DC_LOG_SYNC(
                                "Invalid SS percentage ");
                        DC_LOG_SYNC(
                                "for HDMI in ATOMBIOS info Table!!!\n");
                        continue;
                }
                if (ss_info_cur->spread_percentage_divider == 1000) {
                        /* Keep previous precision from ATOMBIOS for these
                        * in case new precision set by ATOMBIOS for these
                        * (otherwise all code in DCE specific classes
                        * for all previous ASICs would need
                        * to be updated for SS calculations,
                        * Audio SS compensation and DP DTO SS compensation
                        * which assumes fixed SS percentage Divider = 100)*/
                        ss_info_cur->spread_spectrum_percentage /= 10;
                        ss_info_cur->spread_percentage_divider = 100;
                }

                ss_data_cur->freq_range_khz = ss_info_cur->target_clock_range;
                ss_data_cur->percentage =
                                ss_info_cur->spread_spectrum_percentage;
                ss_data_cur->percentage_divider =
                                ss_info_cur->spread_percentage_divider;
                ss_data_cur->modulation_freq_hz =
                                ss_info_cur->spread_spectrum_range;

                if (ss_info_cur->type.CENTER_MODE)
                        ss_data_cur->flags.CENTER_SPREAD = 1;

                if (ss_info_cur->type.EXTERNAL)
                        ss_data_cur->flags.EXTERNAL_SS = 1;

        }

        *spread_spectrum_data = ss_data;
        kfree(ss_info);
        return;

out_free_data:
        kfree(ss_data);
        *ss_entries_num = 0;
out_free_info:
        kfree(ss_info);
}

static void ss_info_from_atombios_create(
        struct dce110_clk_src *clk_src)
{
        get_ss_info_from_atombios(
                clk_src,
                AS_SIGNAL_TYPE_DISPLAY_PORT,
                &clk_src->dp_ss_params,
                &clk_src->dp_ss_params_cnt);
        get_ss_info_from_atombios(
                clk_src,
                AS_SIGNAL_TYPE_HDMI,
                &clk_src->hdmi_ss_params,
                &clk_src->hdmi_ss_params_cnt);
        get_ss_info_from_atombios(
                clk_src,
                AS_SIGNAL_TYPE_DVI,
                &clk_src->dvi_ss_params,
                &clk_src->dvi_ss_params_cnt);
        get_ss_info_from_atombios(
                clk_src,
                AS_SIGNAL_TYPE_LVDS,
                &clk_src->lvds_ss_params,
                &clk_src->lvds_ss_params_cnt);
}

static bool calc_pll_max_vco_construct(
                        struct calc_pll_clock_source *calc_pll_cs,
                        struct calc_pll_clock_source_init_data *init_data)
{
        uint32_t i;
        struct dc_firmware_info fw_info = { { 0 } };
        if (calc_pll_cs == NULL ||
                        init_data == NULL ||
                        init_data->bp == NULL)
                return false;

        if (init_data->bp->funcs->get_firmware_info(
                                init_data->bp,
                                &fw_info) != BP_RESULT_OK)
                return false;

        calc_pll_cs->ctx = init_data->ctx;
        calc_pll_cs->ref_freq_khz = fw_info.pll_info.crystal_frequency;
        calc_pll_cs->min_vco_khz =
                        fw_info.pll_info.min_output_pxl_clk_pll_frequency;
        calc_pll_cs->max_vco_khz =
                        fw_info.pll_info.max_output_pxl_clk_pll_frequency;

        if (init_data->max_override_input_pxl_clk_pll_freq_khz != 0)
                calc_pll_cs->max_pll_input_freq_khz =
                        init_data->max_override_input_pxl_clk_pll_freq_khz;
        else
                calc_pll_cs->max_pll_input_freq_khz =
                        fw_info.pll_info.max_input_pxl_clk_pll_frequency;

        if (init_data->min_override_input_pxl_clk_pll_freq_khz != 0)
                calc_pll_cs->min_pll_input_freq_khz =
                        init_data->min_override_input_pxl_clk_pll_freq_khz;
        else
                calc_pll_cs->min_pll_input_freq_khz =
                        fw_info.pll_info.min_input_pxl_clk_pll_frequency;

        calc_pll_cs->min_pix_clock_pll_post_divider =
                        init_data->min_pix_clk_pll_post_divider;
        calc_pll_cs->max_pix_clock_pll_post_divider =
                        init_data->max_pix_clk_pll_post_divider;
        calc_pll_cs->min_pll_ref_divider =
                        init_data->min_pll_ref_divider;
        calc_pll_cs->max_pll_ref_divider =
                        init_data->max_pll_ref_divider;

        if (init_data->num_fract_fb_divider_decimal_point == 0 ||
                init_data->num_fract_fb_divider_decimal_point_precision >
                                init_data->num_fract_fb_divider_decimal_point) {
                DC_LOG_ERROR(
                        "The dec point num or precision is incorrect!");
                return false;
        }
        if (init_data->num_fract_fb_divider_decimal_point_precision == 0) {
                DC_LOG_ERROR(
                        "Incorrect fract feedback divider precision num!");
                return false;
        }

        calc_pll_cs->fract_fb_divider_decimal_points_num =
                                init_data->num_fract_fb_divider_decimal_point;
        calc_pll_cs->fract_fb_divider_precision =
                        init_data->num_fract_fb_divider_decimal_point_precision;
        calc_pll_cs->fract_fb_divider_factor = 1;
        for (i = 0; i < calc_pll_cs->fract_fb_divider_decimal_points_num; ++i)
                calc_pll_cs->fract_fb_divider_factor *= 10;

        calc_pll_cs->fract_fb_divider_precision_factor = 1;
        for (
                i = 0;
                i < (calc_pll_cs->fract_fb_divider_decimal_points_num -
                                calc_pll_cs->fract_fb_divider_precision);
                ++i)
                calc_pll_cs->fract_fb_divider_precision_factor *= 10;

        return true;
}

bool dce110_clk_src_construct(
        struct dce110_clk_src *clk_src,
        struct dc_context *ctx,
        struct dc_bios *bios,
        enum clock_source_id id,
        const struct dce110_clk_src_regs *regs,
        const struct dce110_clk_src_shift *cs_shift,
        const struct dce110_clk_src_mask *cs_mask)
{
        struct dc_firmware_info fw_info = { { 0 } };
        struct calc_pll_clock_source_init_data calc_pll_cs_init_data_hdmi;
        struct calc_pll_clock_source_init_data calc_pll_cs_init_data;

        clk_src->base.ctx = ctx;
        clk_src->bios = bios;
        clk_src->base.id = id;
        clk_src->base.funcs = &dce110_clk_src_funcs;

        clk_src->regs = regs;
        clk_src->cs_shift = cs_shift;
        clk_src->cs_mask = cs_mask;

        if (clk_src->bios->funcs->get_firmware_info(
                        clk_src->bios, &fw_info) != BP_RESULT_OK) {
                ASSERT_CRITICAL(false);
                goto unexpected_failure;
        }

        clk_src->ext_clk_khz =
                        fw_info.external_clock_source_frequency_for_dp;

        /* structure normally used with PLL ranges from ATOMBIOS; DS on by default */
        calc_pll_cs_init_data.bp = bios;
        calc_pll_cs_init_data.min_pix_clk_pll_post_divider = 1;
        calc_pll_cs_init_data.max_pix_clk_pll_post_divider =
                        clk_src->cs_mask->PLL_POST_DIV_PIXCLK;
        calc_pll_cs_init_data.min_pll_ref_divider =     1;
        calc_pll_cs_init_data.max_pll_ref_divider =     clk_src->cs_mask->PLL_REF_DIV;
        /* when 0 use minInputPxlClkPLLFrequencyInKHz from firmwareInfo*/
        calc_pll_cs_init_data.min_override_input_pxl_clk_pll_freq_khz = 0;
        /* when 0 use maxInputPxlClkPLLFrequencyInKHz from firmwareInfo*/
        calc_pll_cs_init_data.max_override_input_pxl_clk_pll_freq_khz = 0;
        /*numberOfFractFBDividerDecimalPoints*/
        calc_pll_cs_init_data.num_fract_fb_divider_decimal_point =
                        FRACT_FB_DIVIDER_DEC_POINTS_MAX_NUM;
        /*number of decimal point to round off for fractional feedback divider value*/
        calc_pll_cs_init_data.num_fract_fb_divider_decimal_point_precision =
                        FRACT_FB_DIVIDER_DEC_POINTS_MAX_NUM;
        calc_pll_cs_init_data.ctx =     ctx;

        /*structure for HDMI, no SS or SS% <= 0.06% for 27 MHz Ref clock */
        calc_pll_cs_init_data_hdmi.bp = bios;
        calc_pll_cs_init_data_hdmi.min_pix_clk_pll_post_divider = 1;
        calc_pll_cs_init_data_hdmi.max_pix_clk_pll_post_divider =
                        clk_src->cs_mask->PLL_POST_DIV_PIXCLK;
        calc_pll_cs_init_data_hdmi.min_pll_ref_divider = 1;
        calc_pll_cs_init_data_hdmi.max_pll_ref_divider = clk_src->cs_mask->PLL_REF_DIV;
        /* when 0 use minInputPxlClkPLLFrequencyInKHz from firmwareInfo*/
        calc_pll_cs_init_data_hdmi.min_override_input_pxl_clk_pll_freq_khz = 13500;
        /* when 0 use maxInputPxlClkPLLFrequencyInKHz from firmwareInfo*/
        calc_pll_cs_init_data_hdmi.max_override_input_pxl_clk_pll_freq_khz = 27000;
        /*numberOfFractFBDividerDecimalPoints*/
        calc_pll_cs_init_data_hdmi.num_fract_fb_divider_decimal_point =
                        FRACT_FB_DIVIDER_DEC_POINTS_MAX_NUM;
        /*number of decimal point to round off for fractional feedback divider value*/
        calc_pll_cs_init_data_hdmi.num_fract_fb_divider_decimal_point_precision =
                        FRACT_FB_DIVIDER_DEC_POINTS_MAX_NUM;
        calc_pll_cs_init_data_hdmi.ctx = ctx;

        clk_src->ref_freq_khz = fw_info.pll_info.crystal_frequency;

        if (clk_src->base.id == CLOCK_SOURCE_ID_EXTERNAL)
                return true;

        /* PLL only from here on */
        ss_info_from_atombios_create(clk_src);

        if (!calc_pll_max_vco_construct(
                        &clk_src->calc_pll,
                        &calc_pll_cs_init_data)) {
                ASSERT_CRITICAL(false);
                goto unexpected_failure;
        }


        calc_pll_cs_init_data_hdmi.
                        min_override_input_pxl_clk_pll_freq_khz = clk_src->ref_freq_khz/2;
        calc_pll_cs_init_data_hdmi.
                        max_override_input_pxl_clk_pll_freq_khz = clk_src->ref_freq_khz;


        if (!calc_pll_max_vco_construct(
                        &clk_src->calc_pll_hdmi, &calc_pll_cs_init_data_hdmi)) {
                ASSERT_CRITICAL(false);
                goto unexpected_failure;
        }

        return true;

unexpected_failure:
        return false;
}

bool dce112_clk_src_construct(
        struct dce110_clk_src *clk_src,
        struct dc_context *ctx,
        struct dc_bios *bios,
        enum clock_source_id id,
        const struct dce110_clk_src_regs *regs,
        const struct dce110_clk_src_shift *cs_shift,
        const struct dce110_clk_src_mask *cs_mask)
{
        struct dc_firmware_info fw_info = { { 0 } };

        clk_src->base.ctx = ctx;
        clk_src->bios = bios;
        clk_src->base.id = id;
        clk_src->base.funcs = &dce112_clk_src_funcs;

        clk_src->regs = regs;
        clk_src->cs_shift = cs_shift;
        clk_src->cs_mask = cs_mask;

        if (clk_src->bios->funcs->get_firmware_info(
                        clk_src->bios, &fw_info) != BP_RESULT_OK) {
                ASSERT_CRITICAL(false);
                return false;
        }

        clk_src->ext_clk_khz = fw_info.external_clock_source_frequency_for_dp;

        return true;
}