/*
 * Copyright 2018 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 "dccg.h"
#include "clk_mgr_internal.h"

#include "dce100/dce_clk_mgr.h"
#include "dcn20_clk_mgr.h"
#include "reg_helper.h"
#include "core_types.h"
#include "dm_helpers.h"

#include "navi10_ip_offset.h"
#include "dcn/dcn_2_0_0_offset.h"
#include "dcn/dcn_2_0_0_sh_mask.h"
#include "clk/clk_11_0_0_offset.h"
#include "clk/clk_11_0_0_sh_mask.h"


#undef FN
#define FN(reg_name, field_name) \
        clk_mgr->clk_mgr_shift->field_name, clk_mgr->clk_mgr_mask->field_name

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

#define BASE_INNER(seg) DCN_BASE__INST0_SEG ## seg

#define BASE(seg) BASE_INNER(seg)

#define SR(reg_name)\
                .reg_name = BASE(mm ## reg_name ## _BASE_IDX) +  \
                                        mm ## reg_name

#define CLK_BASE_INNER(seg) \
        CLK_BASE__INST0_SEG ## seg


static const struct clk_mgr_registers clk_mgr_regs = {
        CLK_REG_LIST_NV10()
};

static const struct clk_mgr_shift clk_mgr_shift = {
        CLK_MASK_SH_LIST_NV10(__SHIFT)
};

static const struct clk_mgr_mask clk_mgr_mask = {
        CLK_MASK_SH_LIST_NV10(_MASK)
};

uint32_t dentist_get_did_from_divider(int divider)
{
        uint32_t divider_id;

        /* we want to floor here to get higher clock than required rather than lower */
        if (divider < DENTIST_DIVIDER_RANGE_2_START) {
                if (divider < DENTIST_DIVIDER_RANGE_1_START)
                        divider_id = DENTIST_BASE_DID_1;
                else
                        divider_id = DENTIST_BASE_DID_1
                                + (divider - DENTIST_DIVIDER_RANGE_1_START)
                                        / DENTIST_DIVIDER_RANGE_1_STEP;
        } else if (divider < DENTIST_DIVIDER_RANGE_3_START) {
                divider_id = DENTIST_BASE_DID_2
                                + (divider - DENTIST_DIVIDER_RANGE_2_START)
                                        / DENTIST_DIVIDER_RANGE_2_STEP;
        } else if (divider < DENTIST_DIVIDER_RANGE_4_START) {
                divider_id = DENTIST_BASE_DID_3
                                + (divider - DENTIST_DIVIDER_RANGE_3_START)
                                        / DENTIST_DIVIDER_RANGE_3_STEP;
        } else {
                divider_id = DENTIST_BASE_DID_4
                                + (divider - DENTIST_DIVIDER_RANGE_4_START)
                                        / DENTIST_DIVIDER_RANGE_4_STEP;
                if (divider_id > DENTIST_MAX_DID)
                        divider_id = DENTIST_MAX_DID;
        }

        return divider_id;
}

void dcn20_update_clocks_update_dpp_dto(struct clk_mgr_internal *clk_mgr,
                struct dc_state *context, bool safe_to_lower)
{
        int i;

        clk_mgr->dccg->ref_dppclk = clk_mgr->base.clks.dppclk_khz;
        for (i = 0; i < clk_mgr->base.ctx->dc->res_pool->pipe_count; i++) {
                int dpp_inst, dppclk_khz, prev_dppclk_khz;

                /* Loop index will match dpp->inst if resource exists,
                 * and we want to avoid dependency on dpp object
                 */
                dpp_inst = i;
                dppclk_khz = context->res_ctx.pipe_ctx[i].plane_res.bw.dppclk_khz;

                prev_dppclk_khz = clk_mgr->dccg->pipe_dppclk_khz[i];

                if (safe_to_lower || prev_dppclk_khz < dppclk_khz)
                        clk_mgr->dccg->funcs->update_dpp_dto(
                                                        clk_mgr->dccg, dpp_inst, dppclk_khz);
        }
}

void dcn20_update_clocks_update_dentist(struct clk_mgr_internal *clk_mgr, struct dc_state *context)
{
        int dpp_divider = 0;
        int disp_divider = 0;
        uint32_t dppclk_wdivider = 0;
        uint32_t dispclk_wdivider = 0;
        uint32_t current_dispclk_wdivider;
        uint32_t i;

        if (clk_mgr->base.clks.dppclk_khz == 0 || clk_mgr->base.clks.dispclk_khz == 0)
                return;

        dpp_divider = DENTIST_DIVIDER_RANGE_SCALE_FACTOR
                * clk_mgr->base.dentist_vco_freq_khz / clk_mgr->base.clks.dppclk_khz;
        disp_divider = DENTIST_DIVIDER_RANGE_SCALE_FACTOR
                * clk_mgr->base.dentist_vco_freq_khz / clk_mgr->base.clks.dispclk_khz;

        dppclk_wdivider = dentist_get_did_from_divider(dpp_divider);
        dispclk_wdivider = dentist_get_did_from_divider(disp_divider);

        REG_GET(DENTIST_DISPCLK_CNTL,
                        DENTIST_DISPCLK_WDIVIDER, &current_dispclk_wdivider);

        /* When changing divider to or from 127, some extra programming is required to prevent corruption */
        if (current_dispclk_wdivider == 127 && dispclk_wdivider != 127) {
                for (i = 0; i < clk_mgr->base.ctx->dc->res_pool->pipe_count; i++) {
                        struct pipe_ctx *pipe_ctx = &context->res_ctx.pipe_ctx[i];
                        uint32_t fifo_level;
                        struct dccg *dccg = clk_mgr->base.ctx->dc->res_pool->dccg;
                        struct stream_encoder *stream_enc = pipe_ctx->stream_res.stream_enc;
                        int32_t N;
                        int32_t j;

                        if (!resource_is_pipe_type(pipe_ctx, OTG_MASTER))
                                continue;
                        /* Virtual encoders don't have this function */
                        if (!stream_enc->funcs->get_fifo_cal_average_level)
                                continue;
                        fifo_level = stream_enc->funcs->get_fifo_cal_average_level(
                                        stream_enc);
                        N = fifo_level / 4;
                        dccg->funcs->set_fifo_errdet_ovr_en(
                                        dccg,
                                        true);
                        for (j = 0; j < N - 4; j++)
                                dccg->funcs->otg_drop_pixel(
                                                dccg,
                                                pipe_ctx->stream_res.tg->inst);
                        dccg->funcs->set_fifo_errdet_ovr_en(
                                        dccg,
                                        false);
                }
        } else if (dispclk_wdivider == 127 && current_dispclk_wdivider != 127) {
                REG_UPDATE(DENTIST_DISPCLK_CNTL,
                                DENTIST_DISPCLK_WDIVIDER, 126);
                REG_WAIT(DENTIST_DISPCLK_CNTL, DENTIST_DISPCLK_CHG_DONE, 1, 50, 2000);
                for (i = 0; i < clk_mgr->base.ctx->dc->res_pool->pipe_count; i++) {
                        struct pipe_ctx *pipe_ctx = &context->res_ctx.pipe_ctx[i];
                        struct dccg *dccg = clk_mgr->base.ctx->dc->res_pool->dccg;
                        struct stream_encoder *stream_enc = pipe_ctx->stream_res.stream_enc;
                        uint32_t fifo_level;
                        int32_t N;
                        int32_t j;

                        if (!resource_is_pipe_type(pipe_ctx, OTG_MASTER))
                                continue;
                        /* Virtual encoders don't have this function */
                        if (!stream_enc->funcs->get_fifo_cal_average_level)
                                continue;
                        fifo_level = stream_enc->funcs->get_fifo_cal_average_level(
                                        stream_enc);
                        N = fifo_level / 4;
                        dccg->funcs->set_fifo_errdet_ovr_en(dccg, true);
                        for (j = 0; j < 12 - N; j++)
                                dccg->funcs->otg_add_pixel(dccg,
                                                pipe_ctx->stream_res.tg->inst);
                        dccg->funcs->set_fifo_errdet_ovr_en(dccg, false);
                }
        }

        REG_UPDATE(DENTIST_DISPCLK_CNTL,
                        DENTIST_DISPCLK_WDIVIDER, dispclk_wdivider);
        REG_WAIT(DENTIST_DISPCLK_CNTL, DENTIST_DISPCLK_CHG_DONE, 1, 50, 2000);
        REG_UPDATE(DENTIST_DISPCLK_CNTL,
                        DENTIST_DPPCLK_WDIVIDER, dppclk_wdivider);
        REG_WAIT(DENTIST_DISPCLK_CNTL, DENTIST_DPPCLK_CHG_DONE, 1, 5, 100);
}


void dcn2_update_clocks(struct clk_mgr *clk_mgr_base,
                        struct dc_state *context,
                        bool safe_to_lower)
{
        struct clk_mgr_internal *clk_mgr = TO_CLK_MGR_INTERNAL(clk_mgr_base);
        struct dc_clocks *new_clocks = &context->bw_ctx.bw.dcn.clk;
        struct dc *dc = clk_mgr_base->ctx->dc;
        struct pp_smu_funcs_nv *pp_smu = NULL;
        int display_count;
        bool update_dppclk = false;
        bool update_dispclk = false;
        bool enter_display_off = false;
        bool dpp_clock_lowered = false;
        struct dmcu *dmcu = clk_mgr_base->ctx->dc->res_pool->dmcu;
        bool force_reset = false;
        bool p_state_change_support;
        int total_plane_count;

        if (dc->work_arounds.skip_clock_update)
                return;

        if (clk_mgr_base->clks.dispclk_khz == 0 ||
                dc->debug.force_clock_mode & 0x1) {
                //this is from resume or boot up, if forced_clock cfg option used, we bypass program dispclk and DPPCLK, but need set them for S3.
                force_reset = true;

                dcn2_read_clocks_from_hw_dentist(clk_mgr_base);

                //force_clock_mode 0x1:  force reset the clock even it is the same clock as long as it is in Passive level.
        }
        display_count = clk_mgr_helper_get_active_display_cnt(dc, context);
        if (dc->res_pool->pp_smu)
                pp_smu = &dc->res_pool->pp_smu->nv_funcs;

        if (display_count == 0)
                enter_display_off = true;

        if (enter_display_off == safe_to_lower) {
                if (pp_smu && pp_smu->set_display_count)
                        pp_smu->set_display_count(&pp_smu->pp_smu, display_count);
        }

        if (dc->debug.force_min_dcfclk_mhz > 0)
                new_clocks->dcfclk_khz = (new_clocks->dcfclk_khz > (dc->debug.force_min_dcfclk_mhz * 1000)) ?
                                new_clocks->dcfclk_khz : (dc->debug.force_min_dcfclk_mhz * 1000);

        if (should_set_clock(safe_to_lower, new_clocks->dcfclk_khz, clk_mgr_base->clks.dcfclk_khz)) {
                clk_mgr_base->clks.dcfclk_khz = new_clocks->dcfclk_khz;
                if (pp_smu && pp_smu->set_hard_min_dcfclk_by_freq)
                        pp_smu->set_hard_min_dcfclk_by_freq(&pp_smu->pp_smu, khz_to_mhz_ceil(clk_mgr_base->clks.dcfclk_khz));
        }

        if (should_set_clock(safe_to_lower,
                        new_clocks->dcfclk_deep_sleep_khz, clk_mgr_base->clks.dcfclk_deep_sleep_khz)) {
                clk_mgr_base->clks.dcfclk_deep_sleep_khz = new_clocks->dcfclk_deep_sleep_khz;
                if (pp_smu && pp_smu->set_min_deep_sleep_dcfclk)
                        pp_smu->set_min_deep_sleep_dcfclk(&pp_smu->pp_smu, khz_to_mhz_ceil(clk_mgr_base->clks.dcfclk_deep_sleep_khz));
        }

        if (should_set_clock(safe_to_lower, new_clocks->socclk_khz, clk_mgr_base->clks.socclk_khz)) {
                clk_mgr_base->clks.socclk_khz = new_clocks->socclk_khz;
                if (pp_smu && pp_smu->set_hard_min_socclk_by_freq)
                        pp_smu->set_hard_min_socclk_by_freq(&pp_smu->pp_smu, khz_to_mhz_ceil(clk_mgr_base->clks.socclk_khz));
        }

        total_plane_count = clk_mgr_helper_get_active_plane_cnt(dc, context);
        p_state_change_support = new_clocks->p_state_change_support || (total_plane_count == 0);
        if (should_update_pstate_support(safe_to_lower, p_state_change_support, clk_mgr_base->clks.p_state_change_support)) {
                clk_mgr_base->clks.prev_p_state_change_support = clk_mgr_base->clks.p_state_change_support;
                clk_mgr_base->clks.p_state_change_support = p_state_change_support;
                if (pp_smu && pp_smu->set_pstate_handshake_support)
                        pp_smu->set_pstate_handshake_support(&pp_smu->pp_smu, clk_mgr_base->clks.p_state_change_support);
        }

        if (should_set_clock(safe_to_lower, new_clocks->dramclk_khz, clk_mgr_base->clks.dramclk_khz)) {
                clk_mgr_base->clks.dramclk_khz = new_clocks->dramclk_khz;
                if (pp_smu && pp_smu->set_hard_min_uclk_by_freq)
                        pp_smu->set_hard_min_uclk_by_freq(&pp_smu->pp_smu, khz_to_mhz_ceil(clk_mgr_base->clks.dramclk_khz));
        }

        if (should_set_clock(safe_to_lower, new_clocks->dppclk_khz, clk_mgr->base.clks.dppclk_khz)) {
                if (clk_mgr->base.clks.dppclk_khz > new_clocks->dppclk_khz)
                        dpp_clock_lowered = true;
                clk_mgr->base.clks.dppclk_khz = new_clocks->dppclk_khz;

                update_dppclk = true;
        }

        if (should_set_clock(safe_to_lower, new_clocks->dispclk_khz, clk_mgr_base->clks.dispclk_khz)) {
                clk_mgr_base->clks.dispclk_khz = new_clocks->dispclk_khz;

                update_dispclk = true;
        }

        if (update_dppclk || update_dispclk) {
                new_clocks->disp_dpp_voltage_level_khz = new_clocks->dppclk_khz;

                if (update_dispclk)
                        new_clocks->disp_dpp_voltage_level_khz = new_clocks->dispclk_khz > new_clocks->dppclk_khz ? new_clocks->dispclk_khz : new_clocks->dppclk_khz;

                clk_mgr_base->clks.disp_dpp_voltage_level_khz = new_clocks->disp_dpp_voltage_level_khz;
                if (pp_smu && pp_smu->set_voltage_by_freq)
                        pp_smu->set_voltage_by_freq(&pp_smu->pp_smu, PP_SMU_NV_DISPCLK, khz_to_mhz_ceil(clk_mgr_base->clks.disp_dpp_voltage_level_khz));
        }

        if (dc->config.forced_clocks == false || (force_reset && safe_to_lower)) {
                if (dpp_clock_lowered) {
                        // if clock is being lowered, increase DTO before lowering refclk
                        dcn20_update_clocks_update_dpp_dto(clk_mgr, context, safe_to_lower);
                        dcn20_update_clocks_update_dentist(clk_mgr, context);
                } else {
                        // if clock is being raised, increase refclk before lowering DTO
                        if (update_dppclk || update_dispclk)
                                dcn20_update_clocks_update_dentist(clk_mgr, context);
                        // always update dtos unless clock is lowered and not safe to lower
                        dcn20_update_clocks_update_dpp_dto(clk_mgr, context, safe_to_lower);
                }
        }

        if (update_dispclk &&
                        dmcu && dmcu->funcs->is_dmcu_initialized(dmcu)) {
                /*update dmcu for wait_loop count*/
                dmcu->funcs->set_psr_wait_loop(dmcu,
                        clk_mgr_base->clks.dispclk_khz / 1000 / 7);
        }
}

void dcn2_update_clocks_fpga(struct clk_mgr *clk_mgr,
                struct dc_state *context,
                bool safe_to_lower)
{
        struct clk_mgr_internal *clk_mgr_int = TO_CLK_MGR_INTERNAL(clk_mgr);

        struct dc_clocks *new_clocks = &context->bw_ctx.bw.dcn.clk;
        /* Min fclk = 1.2GHz since all the extra scemi logic seems to run off of it */
        int fclk_adj = new_clocks->fclk_khz > 1200000 ? new_clocks->fclk_khz : 1200000;

        if (should_set_clock(safe_to_lower, new_clocks->phyclk_khz, clk_mgr->clks.phyclk_khz)) {
                clk_mgr->clks.phyclk_khz = new_clocks->phyclk_khz;
        }

        if (should_set_clock(safe_to_lower, new_clocks->dcfclk_khz, clk_mgr->clks.dcfclk_khz)) {
                clk_mgr->clks.dcfclk_khz = new_clocks->dcfclk_khz;
        }

        if (should_set_clock(safe_to_lower,
                        new_clocks->dcfclk_deep_sleep_khz, clk_mgr->clks.dcfclk_deep_sleep_khz)) {
                clk_mgr->clks.dcfclk_deep_sleep_khz = new_clocks->dcfclk_deep_sleep_khz;
        }

        if (should_set_clock(safe_to_lower, new_clocks->socclk_khz, clk_mgr->clks.socclk_khz)) {
                clk_mgr->clks.socclk_khz = new_clocks->socclk_khz;
        }

        if (should_set_clock(safe_to_lower, new_clocks->dramclk_khz, clk_mgr->clks.dramclk_khz)) {
                clk_mgr->clks.dramclk_khz = new_clocks->dramclk_khz;
        }

        if (should_set_clock(safe_to_lower, new_clocks->dppclk_khz, clk_mgr->clks.dppclk_khz)) {
                clk_mgr->clks.dppclk_khz = new_clocks->dppclk_khz;
        }

        if (should_set_clock(safe_to_lower, fclk_adj, clk_mgr->clks.fclk_khz)) {
                clk_mgr->clks.fclk_khz = fclk_adj;
        }

        if (should_set_clock(safe_to_lower, new_clocks->dispclk_khz, clk_mgr->clks.dispclk_khz)) {
                clk_mgr->clks.dispclk_khz = new_clocks->dispclk_khz;
        }

        /* Both fclk and ref_dppclk run on the same scemi clock.
         * So take the higher value since the DPP DTO is typically programmed
         * such that max dppclk is 1:1 with ref_dppclk.
         */
        if (clk_mgr->clks.fclk_khz > clk_mgr->clks.dppclk_khz)
                clk_mgr->clks.dppclk_khz = clk_mgr->clks.fclk_khz;
        if (clk_mgr->clks.dppclk_khz > clk_mgr->clks.fclk_khz)
                clk_mgr->clks.fclk_khz = clk_mgr->clks.dppclk_khz;

        // Both fclk and ref_dppclk run on the same scemi clock.
        clk_mgr_int->dccg->ref_dppclk = clk_mgr->clks.fclk_khz;

        /* TODO: set dtbclk in correct place */
        clk_mgr->clks.dtbclk_en = false;
        dm_set_dcn_clocks(clk_mgr->ctx, &clk_mgr->clks);
}

void dcn2_init_clocks(struct clk_mgr *clk_mgr)
{
        memset(&(clk_mgr->clks), 0, sizeof(struct dc_clocks));
        // Assumption is that boot state always supports pstate
        clk_mgr->clks.p_state_change_support = true;
        clk_mgr->clks.prev_p_state_change_support = true;
}

static void dcn2_enable_pme_wa(struct clk_mgr *clk_mgr_base)
{
        struct clk_mgr_internal *clk_mgr = TO_CLK_MGR_INTERNAL(clk_mgr_base);
        struct pp_smu_funcs_nv *pp_smu = NULL;

        if (clk_mgr->pp_smu) {
                pp_smu = &clk_mgr->pp_smu->nv_funcs;

                if (pp_smu->set_pme_wa_enable)
                        pp_smu->set_pme_wa_enable(&pp_smu->pp_smu);
        }
}


void dcn2_read_clocks_from_hw_dentist(struct clk_mgr *clk_mgr_base)
{
        struct clk_mgr_internal *clk_mgr = TO_CLK_MGR_INTERNAL(clk_mgr_base);
        uint32_t dispclk_wdivider;
        uint32_t dppclk_wdivider;
        int disp_divider;
        int dpp_divider;

        REG_GET(DENTIST_DISPCLK_CNTL, DENTIST_DISPCLK_WDIVIDER, &dispclk_wdivider);
        REG_GET(DENTIST_DISPCLK_CNTL, DENTIST_DPPCLK_WDIVIDER, &dppclk_wdivider);

        disp_divider = dentist_get_divider_from_did(dispclk_wdivider);
        dpp_divider = dentist_get_divider_from_did(dppclk_wdivider);

        if (disp_divider && dpp_divider) {
                /* Calculate the current DFS clock, in kHz.*/
                clk_mgr_base->clks.dispclk_khz = (DENTIST_DIVIDER_RANGE_SCALE_FACTOR
                        * clk_mgr->base.dentist_vco_freq_khz) / disp_divider;

                clk_mgr_base->clks.dppclk_khz = (DENTIST_DIVIDER_RANGE_SCALE_FACTOR
                                * clk_mgr->base.dentist_vco_freq_khz) / dpp_divider;
        }
}

void dcn2_get_clock(struct clk_mgr *clk_mgr,
                struct dc_state *context,
                        enum dc_clock_type clock_type,
                        struct dc_clock_config *clock_cfg)
{

        if (clock_type == DC_CLOCK_TYPE_DISPCLK) {
                clock_cfg->max_clock_khz = context->bw_ctx.bw.dcn.clk.max_supported_dispclk_khz;
                clock_cfg->min_clock_khz = DCN_MINIMUM_DISPCLK_Khz;
                clock_cfg->current_clock_khz = clk_mgr->clks.dispclk_khz;
                clock_cfg->bw_requirequired_clock_khz = context->bw_ctx.bw.dcn.clk.bw_dispclk_khz;
        }
        if (clock_type == DC_CLOCK_TYPE_DPPCLK) {
                clock_cfg->max_clock_khz = context->bw_ctx.bw.dcn.clk.max_supported_dppclk_khz;
                clock_cfg->min_clock_khz = DCN_MINIMUM_DPPCLK_Khz;
                clock_cfg->current_clock_khz = clk_mgr->clks.dppclk_khz;
                clock_cfg->bw_requirequired_clock_khz = context->bw_ctx.bw.dcn.clk.bw_dppclk_khz;
        }
}

static bool dcn2_are_clock_states_equal(struct dc_clocks *a,
                struct dc_clocks *b)
{
        if (a->dispclk_khz != b->dispclk_khz)
                return false;
        else if (a->dppclk_khz != b->dppclk_khz)
                return false;
        else if (a->disp_dpp_voltage_level_khz != b->disp_dpp_voltage_level_khz)
                return false;
        else if (a->dcfclk_khz != b->dcfclk_khz)
                return false;
        else if (a->socclk_khz != b->socclk_khz)
                return false;
        else if (a->dcfclk_deep_sleep_khz != b->dcfclk_deep_sleep_khz)
                return false;
        else if (a->dramclk_khz != b->dramclk_khz)
                return false;
        else if (a->p_state_change_support != b->p_state_change_support)
                return false;

        return true;
}

/* Notify clk_mgr of a change in link rate, update phyclk frequency if necessary */
static void dcn2_notify_link_rate_change(struct clk_mgr *clk_mgr_base, struct dc_link *link)
{
        struct clk_mgr_internal *clk_mgr = TO_CLK_MGR_INTERNAL(clk_mgr_base);
        unsigned int i, max_phyclk_req = 0;
        struct pp_smu_funcs_nv *pp_smu = NULL;

        if (!clk_mgr->pp_smu || !clk_mgr->pp_smu->nv_funcs.set_voltage_by_freq)
                return;

        pp_smu = &clk_mgr->pp_smu->nv_funcs;

        clk_mgr->cur_phyclk_req_table[link->link_index] = link->cur_link_settings.link_rate * LINK_RATE_REF_FREQ_IN_KHZ;

        for (i = 0; i < MAX_LINKS; i++) {
                if (clk_mgr->cur_phyclk_req_table[i] > max_phyclk_req)
                        max_phyclk_req = clk_mgr->cur_phyclk_req_table[i];
        }

        if (max_phyclk_req != clk_mgr_base->clks.phyclk_khz) {
                clk_mgr_base->clks.phyclk_khz = max_phyclk_req;
                pp_smu->set_voltage_by_freq(&pp_smu->pp_smu, PP_SMU_NV_PHYCLK, khz_to_mhz_ceil(clk_mgr_base->clks.phyclk_khz));
        }
}

static struct clk_mgr_funcs dcn2_funcs = {
        .get_dp_ref_clk_frequency = dce12_get_dp_ref_freq_khz,
        .update_clocks = dcn2_update_clocks,
        .init_clocks = dcn2_init_clocks,
        .enable_pme_wa = dcn2_enable_pme_wa,
        .get_clock = dcn2_get_clock,
        .are_clock_states_equal = dcn2_are_clock_states_equal,
        .notify_link_rate_change = dcn2_notify_link_rate_change,
};


void dcn20_clk_mgr_construct(
                struct dc_context *ctx,
                struct clk_mgr_internal *clk_mgr,
                struct pp_smu_funcs *pp_smu,
                struct dccg *dccg)
{
        int dprefclk_did;
        int target_div;
        uint32_t pll_req_reg;
        struct fixed31_32 pll_req;

        clk_mgr->base.ctx = ctx;
        clk_mgr->pp_smu = pp_smu;
        clk_mgr->base.funcs = &dcn2_funcs;
        clk_mgr->regs = &clk_mgr_regs;
        clk_mgr->clk_mgr_shift = &clk_mgr_shift;
        clk_mgr->clk_mgr_mask = &clk_mgr_mask;

        clk_mgr->dccg = dccg;
        clk_mgr->dfs_bypass_disp_clk = 0;

        clk_mgr->dprefclk_ss_percentage = 0;
        clk_mgr->dprefclk_ss_divider = 1000;
        clk_mgr->ss_on_dprefclk = false;

        clk_mgr->base.dprefclk_khz = 700000; // 700 MHz planned if VCO is 3.85 GHz, will be retrieved

        /* DFS Slice 2 should be used for DPREFCLK */
        dprefclk_did = REG_READ(CLK3_CLK2_DFS_CNTL);
        /* Convert DPREFCLK DFS Slice DID to actual divider */
        target_div = dentist_get_divider_from_did(dprefclk_did);
        /* get FbMult value */
        pll_req_reg = REG_READ(CLK3_CLK_PLL_REQ);

        /* set up a fixed-point number
         * this works because the int part is on the right edge of the register
         * and the frac part is on the left edge
         */

        pll_req = dc_fixpt_from_int(pll_req_reg & clk_mgr->clk_mgr_mask->FbMult_int);
        pll_req.value |= pll_req_reg & clk_mgr->clk_mgr_mask->FbMult_frac;

        /* multiply by REFCLK period */
        pll_req = dc_fixpt_mul_int(pll_req, 100000);

        /* integer part is now VCO frequency in kHz */
        clk_mgr->base.dentist_vco_freq_khz = dc_fixpt_floor(pll_req);

        /* in case we don't get a value from the register, use default */
        if (clk_mgr->base.dentist_vco_freq_khz == 0)
                clk_mgr->base.dentist_vco_freq_khz = 3850000;

        /* Calculate the DPREFCLK in kHz.*/
        clk_mgr->base.dprefclk_khz = (DENTIST_DIVIDER_RANGE_SCALE_FACTOR
                * clk_mgr->base.dentist_vco_freq_khz) / target_div;
        //Integrated_info table does not exist on dGPU projects so should not be referenced
        //anywhere in code for dGPUs.
        //Also there is no plan for now that DFS BYPASS will be used on NV10/12/14.
        clk_mgr->dfs_bypass_enabled = false;

        dce_clock_read_ss_info(clk_mgr);
}