/*
 * Copyright 2011 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: Alex Deucher
 */

#include "radeon.h"
#include "radeon_asic.h"
#include "rv6xxd.h"
#include "r600_dpm.h"
#include "rv6xx_dpm.h"
#include "atom.h"
#include <linux/seq_file.h>

static u32 rv6xx_scale_count_given_unit(struct radeon_device *rdev,
                                        u32 unscaled_count, u32 unit);

static struct rv6xx_ps *rv6xx_get_ps(struct radeon_ps *rps)
{
        struct rv6xx_ps *ps = rps->ps_priv;

        return ps;
}

static struct rv6xx_power_info *rv6xx_get_pi(struct radeon_device *rdev)
{
        struct rv6xx_power_info *pi = rdev->pm.dpm.priv;

        return pi;
}

static void rv6xx_force_pcie_gen1(struct radeon_device *rdev)
{
        u32 tmp;
        int i;

        tmp = RREG32_PCIE_PORT(PCIE_LC_SPEED_CNTL);
        tmp &= LC_GEN2_EN;
        WREG32_PCIE_PORT(PCIE_LC_SPEED_CNTL, tmp);

        tmp = RREG32_PCIE_PORT(PCIE_LC_SPEED_CNTL);
        tmp |= LC_INITIATE_LINK_SPEED_CHANGE;
        WREG32_PCIE_PORT(PCIE_LC_SPEED_CNTL, tmp);

        for (i = 0; i < rdev->usec_timeout; i++) {
                if (!(RREG32_PCIE_PORT(PCIE_LC_SPEED_CNTL) & LC_CURRENT_DATA_RATE))
                        break;
                udelay(1);
        }

        tmp = RREG32_PCIE_PORT(PCIE_LC_SPEED_CNTL);
        tmp &= ~LC_INITIATE_LINK_SPEED_CHANGE;
        WREG32_PCIE_PORT(PCIE_LC_SPEED_CNTL, tmp);
}

static void rv6xx_enable_pcie_gen2_support(struct radeon_device *rdev)
{
        u32 tmp;

        tmp = RREG32_PCIE_PORT(PCIE_LC_SPEED_CNTL);

        if ((tmp & LC_OTHER_SIDE_EVER_SENT_GEN2) &&
            (tmp & LC_OTHER_SIDE_SUPPORTS_GEN2)) {
                tmp |= LC_GEN2_EN;
                WREG32_PCIE_PORT(PCIE_LC_SPEED_CNTL, tmp);
        }
}

static void rv6xx_enable_bif_dynamic_pcie_gen2(struct radeon_device *rdev,
                                               bool enable)
{
        u32 tmp;

        tmp = RREG32_PCIE_PORT(PCIE_LC_SPEED_CNTL) & ~LC_HW_VOLTAGE_IF_CONTROL_MASK;
        if (enable)
                tmp |= LC_HW_VOLTAGE_IF_CONTROL(1);
        else
                tmp |= LC_HW_VOLTAGE_IF_CONTROL(0);
        WREG32_PCIE_PORT(PCIE_LC_SPEED_CNTL, tmp);
}

static void rv6xx_enable_l0s(struct radeon_device *rdev)
{
        u32 tmp;

        tmp = RREG32_PCIE_PORT(PCIE_LC_CNTL) & ~LC_L0S_INACTIVITY_MASK;
        tmp |= LC_L0S_INACTIVITY(3);
        WREG32_PCIE_PORT(PCIE_LC_CNTL, tmp);
}

static void rv6xx_enable_l1(struct radeon_device *rdev)
{
        u32 tmp;

        tmp = RREG32_PCIE_PORT(PCIE_LC_CNTL);
        tmp &= ~LC_L1_INACTIVITY_MASK;
        tmp |= LC_L1_INACTIVITY(4);
        tmp &= ~LC_PMI_TO_L1_DIS;
        tmp &= ~LC_ASPM_TO_L1_DIS;
        WREG32_PCIE_PORT(PCIE_LC_CNTL, tmp);
}

static void rv6xx_enable_pll_sleep_in_l1(struct radeon_device *rdev)
{
        u32 tmp;

        tmp = RREG32_PCIE_PORT(PCIE_LC_CNTL) & ~LC_L1_INACTIVITY_MASK;
        tmp |= LC_L1_INACTIVITY(8);
        WREG32_PCIE_PORT(PCIE_LC_CNTL, tmp);

        /* NOTE, this is a PCIE indirect reg, not PCIE PORT */
        tmp = RREG32_PCIE(PCIE_P_CNTL);
        tmp |= P_PLL_PWRDN_IN_L1L23;
        tmp &= ~P_PLL_BUF_PDNB;
        tmp &= ~P_PLL_PDNB;
        tmp |= P_ALLOW_PRX_FRONTEND_SHUTOFF;
        WREG32_PCIE(PCIE_P_CNTL, tmp);
}

static int rv6xx_convert_clock_to_stepping(struct radeon_device *rdev,
                                           u32 clock, struct rv6xx_sclk_stepping *step)
{
        int ret;
        struct atom_clock_dividers dividers;

        ret = radeon_atom_get_clock_dividers(rdev, COMPUTE_ENGINE_PLL_PARAM,
                                             clock, false, &dividers);
        if (ret)
                return ret;

        if (dividers.enable_post_div)
                step->post_divider = 2 + (dividers.post_div & 0xF) + (dividers.post_div >> 4);
        else
                step->post_divider = 1;

        step->vco_frequency = clock * step->post_divider;

        return 0;
}

static void rv6xx_output_stepping(struct radeon_device *rdev,
                                  u32 step_index, struct rv6xx_sclk_stepping *step)
{
        struct rv6xx_power_info *pi = rv6xx_get_pi(rdev);
        u32 ref_clk = rdev->clock.spll.reference_freq;
        u32 fb_divider;
        u32 spll_step_count = rv6xx_scale_count_given_unit(rdev,
                                                           R600_SPLLSTEPTIME_DFLT *
                                                           pi->spll_ref_div,
                                                           R600_SPLLSTEPUNIT_DFLT);

        r600_engine_clock_entry_enable(rdev, step_index, true);
        r600_engine_clock_entry_enable_pulse_skipping(rdev, step_index, false);

        if (step->post_divider == 1)
                r600_engine_clock_entry_enable_post_divider(rdev, step_index, false);
        else {
                u32 lo_len = (step->post_divider - 2) / 2;
                u32 hi_len = step->post_divider - 2 - lo_len;

                r600_engine_clock_entry_enable_post_divider(rdev, step_index, true);
                r600_engine_clock_entry_set_post_divider(rdev, step_index, (hi_len << 4) | lo_len);
        }

        fb_divider = ((step->vco_frequency * pi->spll_ref_div) / ref_clk) >>
                pi->fb_div_scale;

        r600_engine_clock_entry_set_reference_divider(rdev, step_index,
                                                      pi->spll_ref_div - 1);
        r600_engine_clock_entry_set_feedback_divider(rdev, step_index, fb_divider);
        r600_engine_clock_entry_set_step_time(rdev, step_index, spll_step_count);

}

static struct rv6xx_sclk_stepping rv6xx_next_vco_step(struct radeon_device *rdev,
                                                      struct rv6xx_sclk_stepping *cur,
                                                      bool increasing_vco, u32 step_size)
{
        struct rv6xx_sclk_stepping next;

        next.post_divider = cur->post_divider;

        if (increasing_vco)
                next.vco_frequency = (cur->vco_frequency * (100 + step_size)) / 100;
        else
                next.vco_frequency = (cur->vco_frequency * 100 + 99 + step_size) / (100 + step_size);

        return next;
}

static bool rv6xx_can_step_post_div(struct radeon_device *rdev,
                                    struct rv6xx_sclk_stepping *cur,
                                    struct rv6xx_sclk_stepping *target)
{
        return (cur->post_divider > target->post_divider) &&
                ((cur->vco_frequency * target->post_divider) <=
                 (target->vco_frequency * (cur->post_divider - 1)));
}

static struct rv6xx_sclk_stepping rv6xx_next_post_div_step(struct radeon_device *rdev,
                                                           struct rv6xx_sclk_stepping *cur,
                                                           struct rv6xx_sclk_stepping *target)
{
        struct rv6xx_sclk_stepping next = *cur;

        while (rv6xx_can_step_post_div(rdev, &next, target))
                next.post_divider--;

        return next;
}

static bool rv6xx_reached_stepping_target(struct radeon_device *rdev,
                                          struct rv6xx_sclk_stepping *cur,
                                          struct rv6xx_sclk_stepping *target,
                                          bool increasing_vco)
{
        return (increasing_vco && (cur->vco_frequency >= target->vco_frequency)) ||
                (!increasing_vco && (cur->vco_frequency <= target->vco_frequency));
}

static void rv6xx_generate_steps(struct radeon_device *rdev,
                                 u32 low, u32 high,
                                 u32 start_index, u8 *end_index)
{
        struct rv6xx_sclk_stepping cur;
        struct rv6xx_sclk_stepping target;
        bool increasing_vco;
        u32 step_index = start_index;

        rv6xx_convert_clock_to_stepping(rdev, low, &cur);
        rv6xx_convert_clock_to_stepping(rdev, high, &target);

        rv6xx_output_stepping(rdev, step_index++, &cur);

        increasing_vco = (target.vco_frequency >= cur.vco_frequency);

        if (target.post_divider > cur.post_divider)
                cur.post_divider = target.post_divider;

        while (1) {
                struct rv6xx_sclk_stepping next;

                if (rv6xx_can_step_post_div(rdev, &cur, &target))
                        next = rv6xx_next_post_div_step(rdev, &cur, &target);
                else
                        next = rv6xx_next_vco_step(rdev, &cur, increasing_vco, R600_VCOSTEPPCT_DFLT);

                if (rv6xx_reached_stepping_target(rdev, &next, &target, increasing_vco)) {
                        struct rv6xx_sclk_stepping tiny =
                                rv6xx_next_vco_step(rdev, &target, !increasing_vco, R600_ENDINGVCOSTEPPCT_DFLT);
                        tiny.post_divider = next.post_divider;

                        if (!rv6xx_reached_stepping_target(rdev, &tiny, &cur, !increasing_vco))
                                rv6xx_output_stepping(rdev, step_index++, &tiny);

                        if ((next.post_divider != target.post_divider) &&
                            (next.vco_frequency != target.vco_frequency)) {
                                struct rv6xx_sclk_stepping final_vco;

                                final_vco.vco_frequency = target.vco_frequency;
                                final_vco.post_divider = next.post_divider;

                                rv6xx_output_stepping(rdev, step_index++, &final_vco);
                        }

                        rv6xx_output_stepping(rdev, step_index++, &target);
                        break;
                } else
                        rv6xx_output_stepping(rdev, step_index++, &next);

                cur = next;
        }

        *end_index = (u8)step_index - 1;

}

static void rv6xx_generate_single_step(struct radeon_device *rdev,
                                       u32 clock, u32 index)
{
        struct rv6xx_sclk_stepping step;

        rv6xx_convert_clock_to_stepping(rdev, clock, &step);
        rv6xx_output_stepping(rdev, index, &step);
}

static void rv6xx_invalidate_intermediate_steps_range(struct radeon_device *rdev,
                                                      u32 start_index, u32 end_index)
{
        u32 step_index;

        for (step_index = start_index + 1; step_index < end_index; step_index++)
                r600_engine_clock_entry_enable(rdev, step_index, false);
}

static void rv6xx_set_engine_spread_spectrum_clk_s(struct radeon_device *rdev,
                                                   u32 index, u32 clk_s)
{
        WREG32_P(CG_SPLL_SPREAD_SPECTRUM_LOW + (index * 4),
                 CLKS(clk_s), ~CLKS_MASK);
}

static void rv6xx_set_engine_spread_spectrum_clk_v(struct radeon_device *rdev,
                                                   u32 index, u32 clk_v)
{
        WREG32_P(CG_SPLL_SPREAD_SPECTRUM_LOW + (index * 4),
                 CLKV(clk_v), ~CLKV_MASK);
}

static void rv6xx_enable_engine_spread_spectrum(struct radeon_device *rdev,
                                                u32 index, bool enable)
{
        if (enable)
                WREG32_P(CG_SPLL_SPREAD_SPECTRUM_LOW + (index * 4),
                         SSEN, ~SSEN);
        else
                WREG32_P(CG_SPLL_SPREAD_SPECTRUM_LOW + (index * 4),
                         0, ~SSEN);
}

static void rv6xx_set_memory_spread_spectrum_clk_s(struct radeon_device *rdev,
                                                   u32 clk_s)
{
        WREG32_P(CG_MPLL_SPREAD_SPECTRUM, CLKS(clk_s), ~CLKS_MASK);
}

static void rv6xx_set_memory_spread_spectrum_clk_v(struct radeon_device *rdev,
                                                   u32 clk_v)
{
        WREG32_P(CG_MPLL_SPREAD_SPECTRUM, CLKV(clk_v), ~CLKV_MASK);
}

static void rv6xx_enable_memory_spread_spectrum(struct radeon_device *rdev,
                                                bool enable)
{
        if (enable)
                WREG32_P(CG_MPLL_SPREAD_SPECTRUM, SSEN, ~SSEN);
        else
                WREG32_P(CG_MPLL_SPREAD_SPECTRUM, 0, ~SSEN);
}

static void rv6xx_enable_dynamic_spread_spectrum(struct radeon_device *rdev,
                                                 bool enable)
{
        if (enable)
                WREG32_P(GENERAL_PWRMGT, DYN_SPREAD_SPECTRUM_EN, ~DYN_SPREAD_SPECTRUM_EN);
        else
                WREG32_P(GENERAL_PWRMGT, 0, ~DYN_SPREAD_SPECTRUM_EN);
}

static void rv6xx_memory_clock_entry_enable_post_divider(struct radeon_device *rdev,
                                                         u32 index, bool enable)
{
        if (enable)
                WREG32_P(MPLL_FREQ_LEVEL_0 + (index * 4),
                         LEVEL0_MPLL_DIV_EN, ~LEVEL0_MPLL_DIV_EN);
        else
                WREG32_P(MPLL_FREQ_LEVEL_0 + (index * 4), 0, ~LEVEL0_MPLL_DIV_EN);
}

static void rv6xx_memory_clock_entry_set_post_divider(struct radeon_device *rdev,
                                                      u32 index, u32 divider)
{
        WREG32_P(MPLL_FREQ_LEVEL_0 + (index * 4),
                 LEVEL0_MPLL_POST_DIV(divider), ~LEVEL0_MPLL_POST_DIV_MASK);
}

static void rv6xx_memory_clock_entry_set_feedback_divider(struct radeon_device *rdev,
                                                          u32 index, u32 divider)
{
        WREG32_P(MPLL_FREQ_LEVEL_0 + (index * 4), LEVEL0_MPLL_FB_DIV(divider),
                 ~LEVEL0_MPLL_FB_DIV_MASK);
}

static void rv6xx_memory_clock_entry_set_reference_divider(struct radeon_device *rdev,
                                                           u32 index, u32 divider)
{
        WREG32_P(MPLL_FREQ_LEVEL_0 + (index * 4),
                 LEVEL0_MPLL_REF_DIV(divider), ~LEVEL0_MPLL_REF_DIV_MASK);
}

static void rv6xx_vid_response_set_brt(struct radeon_device *rdev, u32 rt)
{
        WREG32_P(VID_RT, BRT(rt), ~BRT_MASK);
}

static void rv6xx_enable_engine_feedback_and_reference_sync(struct radeon_device *rdev)
{
        WREG32_P(SPLL_CNTL_MODE, SPLL_DIV_SYNC, ~SPLL_DIV_SYNC);
}

static u32 rv6xx_clocks_per_unit(u32 unit)
{
        u32 tmp = 1 << (2 * unit);

        return tmp;
}

static u32 rv6xx_scale_count_given_unit(struct radeon_device *rdev,
                                        u32 unscaled_count, u32 unit)
{
        u32 count_per_unit = rv6xx_clocks_per_unit(unit);

        return (unscaled_count + count_per_unit - 1) / count_per_unit;
}

static u32 rv6xx_compute_count_for_delay(struct radeon_device *rdev,
                                         u32 delay_us, u32 unit)
{
        u32 ref_clk = rdev->clock.spll.reference_freq;

        return rv6xx_scale_count_given_unit(rdev, delay_us * (ref_clk / 100), unit);
}

static void rv6xx_calculate_engine_speed_stepping_parameters(struct radeon_device *rdev,
                                                             struct rv6xx_ps *state)
{
        struct rv6xx_power_info *pi = rv6xx_get_pi(rdev);

        pi->hw.sclks[R600_POWER_LEVEL_LOW] =
                state->low.sclk;
        pi->hw.sclks[R600_POWER_LEVEL_MEDIUM] =
                state->medium.sclk;
        pi->hw.sclks[R600_POWER_LEVEL_HIGH] =
                state->high.sclk;

        pi->hw.low_sclk_index = R600_POWER_LEVEL_LOW;
        pi->hw.medium_sclk_index = R600_POWER_LEVEL_MEDIUM;
        pi->hw.high_sclk_index = R600_POWER_LEVEL_HIGH;
}

static void rv6xx_calculate_memory_clock_stepping_parameters(struct radeon_device *rdev,
                                                             struct rv6xx_ps *state)
{
        struct rv6xx_power_info *pi = rv6xx_get_pi(rdev);

        pi->hw.mclks[R600_POWER_LEVEL_CTXSW] =
                state->high.mclk;
        pi->hw.mclks[R600_POWER_LEVEL_HIGH] =
                state->high.mclk;
        pi->hw.mclks[R600_POWER_LEVEL_MEDIUM] =
                state->medium.mclk;
        pi->hw.mclks[R600_POWER_LEVEL_LOW] =
                state->low.mclk;

        pi->hw.high_mclk_index = R600_POWER_LEVEL_HIGH;

        if (state->high.mclk == state->medium.mclk)
                pi->hw.medium_mclk_index =
                        pi->hw.high_mclk_index;
        else
                pi->hw.medium_mclk_index = R600_POWER_LEVEL_MEDIUM;


        if (state->medium.mclk == state->low.mclk)
                pi->hw.low_mclk_index =
                        pi->hw.medium_mclk_index;
        else
                pi->hw.low_mclk_index = R600_POWER_LEVEL_LOW;
}

static void rv6xx_calculate_voltage_stepping_parameters(struct radeon_device *rdev,
                                                        struct rv6xx_ps *state)
{
        struct rv6xx_power_info *pi = rv6xx_get_pi(rdev);

        pi->hw.vddc[R600_POWER_LEVEL_CTXSW] = state->high.vddc;
        pi->hw.vddc[R600_POWER_LEVEL_HIGH] = state->high.vddc;
        pi->hw.vddc[R600_POWER_LEVEL_MEDIUM] = state->medium.vddc;
        pi->hw.vddc[R600_POWER_LEVEL_LOW] = state->low.vddc;

        pi->hw.backbias[R600_POWER_LEVEL_CTXSW] =
                (state->high.flags & ATOM_PPLIB_R600_FLAGS_BACKBIASENABLE) ? true : false;
        pi->hw.backbias[R600_POWER_LEVEL_HIGH] =
                (state->high.flags & ATOM_PPLIB_R600_FLAGS_BACKBIASENABLE) ? true : false;
        pi->hw.backbias[R600_POWER_LEVEL_MEDIUM] =
                (state->medium.flags & ATOM_PPLIB_R600_FLAGS_BACKBIASENABLE) ? true : false;
        pi->hw.backbias[R600_POWER_LEVEL_LOW] =
                (state->low.flags & ATOM_PPLIB_R600_FLAGS_BACKBIASENABLE) ? true : false;

        pi->hw.pcie_gen2[R600_POWER_LEVEL_HIGH] =
                (state->high.flags & ATOM_PPLIB_R600_FLAGS_PCIEGEN2) ? true : false;
        pi->hw.pcie_gen2[R600_POWER_LEVEL_MEDIUM] =
                (state->medium.flags & ATOM_PPLIB_R600_FLAGS_PCIEGEN2) ? true : false;
        pi->hw.pcie_gen2[R600_POWER_LEVEL_LOW] =
                (state->low.flags & ATOM_PPLIB_R600_FLAGS_PCIEGEN2) ? true : false;

        pi->hw.high_vddc_index = R600_POWER_LEVEL_HIGH;

        if ((state->high.vddc == state->medium.vddc) &&
            ((state->high.flags & ATOM_PPLIB_R600_FLAGS_BACKBIASENABLE) ==
             (state->medium.flags & ATOM_PPLIB_R600_FLAGS_BACKBIASENABLE)))
                pi->hw.medium_vddc_index =
                        pi->hw.high_vddc_index;
        else
                pi->hw.medium_vddc_index = R600_POWER_LEVEL_MEDIUM;

        if ((state->medium.vddc == state->low.vddc) &&
            ((state->medium.flags & ATOM_PPLIB_R600_FLAGS_BACKBIASENABLE) ==
             (state->low.flags & ATOM_PPLIB_R600_FLAGS_BACKBIASENABLE)))
                pi->hw.low_vddc_index =
                        pi->hw.medium_vddc_index;
        else
                pi->hw.medium_vddc_index = R600_POWER_LEVEL_LOW;
}

static inline u32 rv6xx_calculate_vco_frequency(u32 ref_clock,
                                                struct atom_clock_dividers *dividers,
                                                u32 fb_divider_scale)
{
        return ref_clock * ((dividers->fb_div & ~1) << fb_divider_scale) /
                (dividers->ref_div + 1);
}

static inline u32 rv6xx_calculate_spread_spectrum_clk_v(u32 vco_freq, u32 ref_freq,
                                                        u32 ss_rate, u32 ss_percent,
                                                        u32 fb_divider_scale)
{
        u32 fb_divider = vco_freq / ref_freq;

        return (ss_percent * ss_rate * 4 * (fb_divider * fb_divider) /
                (5375 * ((vco_freq * 10) / (4096 >> fb_divider_scale))));
}

static inline u32 rv6xx_calculate_spread_spectrum_clk_s(u32 ss_rate, u32 ref_freq)
{
        return (((ref_freq * 10) / (ss_rate * 2)) - 1) / 4;
}

static void rv6xx_program_engine_spread_spectrum(struct radeon_device *rdev,
                                                 u32 clock, enum r600_power_level level)
{
        u32 ref_clk = rdev->clock.spll.reference_freq;
        struct rv6xx_power_info *pi = rv6xx_get_pi(rdev);
        struct atom_clock_dividers dividers;
        struct radeon_atom_ss ss;
        u32 vco_freq, clk_v, clk_s;

        rv6xx_enable_engine_spread_spectrum(rdev, level, false);

        if (clock && pi->sclk_ss) {
                if (radeon_atom_get_clock_dividers(rdev, COMPUTE_ENGINE_PLL_PARAM, clock, false, &dividers) == 0) {
                        vco_freq = rv6xx_calculate_vco_frequency(ref_clk, &dividers,
                                                                 pi->fb_div_scale);

                        if (radeon_atombios_get_asic_ss_info(rdev, &ss,
                                                             ASIC_INTERNAL_ENGINE_SS, vco_freq)) {
                                clk_v = rv6xx_calculate_spread_spectrum_clk_v(vco_freq,
                                                                              (ref_clk / (dividers.ref_div + 1)),
                                                                              ss.rate,
                                                                              ss.percentage,
                                                                              pi->fb_div_scale);

                                clk_s = rv6xx_calculate_spread_spectrum_clk_s(ss.rate,
                                                                              (ref_clk / (dividers.ref_div + 1)));

                                rv6xx_set_engine_spread_spectrum_clk_v(rdev, level, clk_v);
                                rv6xx_set_engine_spread_spectrum_clk_s(rdev, level, clk_s);
                                rv6xx_enable_engine_spread_spectrum(rdev, level, true);
                        }
                }
        }
}

static void rv6xx_program_sclk_spread_spectrum_parameters_except_lowest_entry(struct radeon_device *rdev)
{
        struct rv6xx_power_info *pi = rv6xx_get_pi(rdev);

        rv6xx_program_engine_spread_spectrum(rdev,
                                             pi->hw.sclks[R600_POWER_LEVEL_HIGH],
                                             R600_POWER_LEVEL_HIGH);

        rv6xx_program_engine_spread_spectrum(rdev,
                                             pi->hw.sclks[R600_POWER_LEVEL_MEDIUM],
                                             R600_POWER_LEVEL_MEDIUM);

}

static int rv6xx_program_mclk_stepping_entry(struct radeon_device *rdev,
                                             u32 entry, u32 clock)
{
        struct atom_clock_dividers dividers;

        if (radeon_atom_get_clock_dividers(rdev, COMPUTE_MEMORY_PLL_PARAM, clock, false, &dividers))
            return -EINVAL;


        rv6xx_memory_clock_entry_set_reference_divider(rdev, entry, dividers.ref_div);
        rv6xx_memory_clock_entry_set_feedback_divider(rdev, entry, dividers.fb_div);
        rv6xx_memory_clock_entry_set_post_divider(rdev, entry, dividers.post_div);

        if (dividers.enable_post_div)
                rv6xx_memory_clock_entry_enable_post_divider(rdev, entry, true);
        else
                rv6xx_memory_clock_entry_enable_post_divider(rdev, entry, false);

        return 0;
}

static void rv6xx_program_mclk_stepping_parameters_except_lowest_entry(struct radeon_device *rdev)
{
        struct rv6xx_power_info *pi = rv6xx_get_pi(rdev);
        int i;

        for (i = 1; i < R600_PM_NUMBER_OF_MCLKS; i++) {
                if (pi->hw.mclks[i])
                        rv6xx_program_mclk_stepping_entry(rdev, i,
                                                          pi->hw.mclks[i]);
        }
}

static void rv6xx_find_memory_clock_with_highest_vco(struct radeon_device *rdev,
                                                     u32 requested_memory_clock,
                                                     u32 ref_clk,
                                                     struct atom_clock_dividers *dividers,
                                                     u32 *vco_freq)
{
        struct rv6xx_power_info *pi = rv6xx_get_pi(rdev);
        struct atom_clock_dividers req_dividers;
        u32 vco_freq_temp;

        if (radeon_atom_get_clock_dividers(rdev, COMPUTE_MEMORY_PLL_PARAM,
                                           requested_memory_clock, false, &req_dividers) == 0) {
                vco_freq_temp = rv6xx_calculate_vco_frequency(ref_clk, &req_dividers,
                                                              pi->fb_div_scale);

                if (vco_freq_temp > *vco_freq) {
                        *dividers = req_dividers;
                        *vco_freq = vco_freq_temp;
                }
        }
}

static void rv6xx_program_mclk_spread_spectrum_parameters(struct radeon_device *rdev)
{
        struct rv6xx_power_info *pi = rv6xx_get_pi(rdev);
        u32 ref_clk = rdev->clock.mpll.reference_freq;
        struct atom_clock_dividers dividers;
        struct radeon_atom_ss ss;
        u32 vco_freq = 0, clk_v, clk_s;

        rv6xx_enable_memory_spread_spectrum(rdev, false);

        if (pi->mclk_ss) {
                rv6xx_find_memory_clock_with_highest_vco(rdev,
                                                         pi->hw.mclks[pi->hw.high_mclk_index],
                                                         ref_clk,
                                                         &dividers,
                                                         &vco_freq);

                rv6xx_find_memory_clock_with_highest_vco(rdev,
                                                         pi->hw.mclks[pi->hw.medium_mclk_index],
                                                         ref_clk,
                                                         &dividers,
                                                         &vco_freq);

                rv6xx_find_memory_clock_with_highest_vco(rdev,
                                                         pi->hw.mclks[pi->hw.low_mclk_index],
                                                         ref_clk,
                                                         &dividers,
                                                         &vco_freq);

                if (vco_freq) {
                        if (radeon_atombios_get_asic_ss_info(rdev, &ss,
                                                             ASIC_INTERNAL_MEMORY_SS, vco_freq)) {
                                clk_v = rv6xx_calculate_spread_spectrum_clk_v(vco_freq,
                                                                             (ref_clk / (dividers.ref_div + 1)),
                                                                             ss.rate,
                                                                             ss.percentage,
                                                                             pi->fb_div_scale);

                                clk_s = rv6xx_calculate_spread_spectrum_clk_s(ss.rate,
                                                                             (ref_clk / (dividers.ref_div + 1)));

                                rv6xx_set_memory_spread_spectrum_clk_v(rdev, clk_v);
                                rv6xx_set_memory_spread_spectrum_clk_s(rdev, clk_s);
                                rv6xx_enable_memory_spread_spectrum(rdev, true);
                        }
                }
        }
}

static int rv6xx_program_voltage_stepping_entry(struct radeon_device *rdev,
                                                u32 entry, u16 voltage)
{
        u32 mask, set_pins;
        int ret;

        ret = radeon_atom_get_voltage_gpio_settings(rdev, voltage,
                                                    SET_VOLTAGE_TYPE_ASIC_VDDC,
                                                    &set_pins, &mask);
        if (ret)
                return ret;

        r600_voltage_control_program_voltages(rdev, entry, set_pins);

        return 0;
}

static void rv6xx_program_voltage_stepping_parameters_except_lowest_entry(struct radeon_device *rdev)
{
        struct rv6xx_power_info *pi = rv6xx_get_pi(rdev);
        int i;

        for (i = 1; i < R600_PM_NUMBER_OF_VOLTAGE_LEVELS; i++)
                rv6xx_program_voltage_stepping_entry(rdev, i,
                                                     pi->hw.vddc[i]);

}

static void rv6xx_program_backbias_stepping_parameters_except_lowest_entry(struct radeon_device *rdev)
{
        struct rv6xx_power_info *pi = rv6xx_get_pi(rdev);

        if (pi->hw.backbias[1])
                WREG32_P(VID_UPPER_GPIO_CNTL, MEDIUM_BACKBIAS_VALUE, ~MEDIUM_BACKBIAS_VALUE);
        else
                WREG32_P(VID_UPPER_GPIO_CNTL, 0, ~MEDIUM_BACKBIAS_VALUE);

        if (pi->hw.backbias[2])
                WREG32_P(VID_UPPER_GPIO_CNTL, HIGH_BACKBIAS_VALUE, ~HIGH_BACKBIAS_VALUE);
        else
                WREG32_P(VID_UPPER_GPIO_CNTL, 0, ~HIGH_BACKBIAS_VALUE);
}

static void rv6xx_program_sclk_spread_spectrum_parameters_lowest_entry(struct radeon_device *rdev)
{
        struct rv6xx_power_info *pi = rv6xx_get_pi(rdev);

        rv6xx_program_engine_spread_spectrum(rdev,
                                             pi->hw.sclks[R600_POWER_LEVEL_LOW],
                                             R600_POWER_LEVEL_LOW);
}

static void rv6xx_program_mclk_stepping_parameters_lowest_entry(struct radeon_device *rdev)
{
        struct rv6xx_power_info *pi = rv6xx_get_pi(rdev);

        if (pi->hw.mclks[0])
                rv6xx_program_mclk_stepping_entry(rdev, 0,
                                                  pi->hw.mclks[0]);
}

static void rv6xx_program_voltage_stepping_parameters_lowest_entry(struct radeon_device *rdev)
{
        struct rv6xx_power_info *pi = rv6xx_get_pi(rdev);

        rv6xx_program_voltage_stepping_entry(rdev, 0,
                                             pi->hw.vddc[0]);

}

static void rv6xx_program_backbias_stepping_parameters_lowest_entry(struct radeon_device *rdev)
{
        struct rv6xx_power_info *pi = rv6xx_get_pi(rdev);

        if (pi->hw.backbias[0])
                WREG32_P(VID_UPPER_GPIO_CNTL, LOW_BACKBIAS_VALUE, ~LOW_BACKBIAS_VALUE);
        else
                WREG32_P(VID_UPPER_GPIO_CNTL, 0, ~LOW_BACKBIAS_VALUE);
}

static u32 calculate_memory_refresh_rate(struct radeon_device *rdev,
                                         u32 engine_clock)
{
        u32 dram_rows, dram_refresh_rate;
        u32 tmp;

        tmp = (RREG32(RAMCFG) & NOOFROWS_MASK) >> NOOFROWS_SHIFT;
        dram_rows = 1 << (tmp + 10);
        dram_refresh_rate = 1 << ((RREG32(MC_SEQ_RESERVE_M) & 0x3) + 3);

        return ((engine_clock * 10) * dram_refresh_rate / dram_rows - 32) / 64;
}

static void rv6xx_program_memory_timing_parameters(struct radeon_device *rdev)
{
        struct rv6xx_power_info *pi = rv6xx_get_pi(rdev);
        u32 sqm_ratio;
        u32 arb_refresh_rate;
        u32 high_clock;

        if (pi->hw.sclks[R600_POWER_LEVEL_HIGH] <
            (pi->hw.sclks[R600_POWER_LEVEL_LOW] * 0xFF / 0x40))
                high_clock = pi->hw.sclks[R600_POWER_LEVEL_HIGH];
        else
                high_clock =
                        pi->hw.sclks[R600_POWER_LEVEL_LOW] * 0xFF / 0x40;

        radeon_atom_set_engine_dram_timings(rdev, high_clock, 0);

        sqm_ratio = (STATE0(64 * high_clock / pi->hw.sclks[R600_POWER_LEVEL_LOW]) |
                     STATE1(64 * high_clock / pi->hw.sclks[R600_POWER_LEVEL_MEDIUM]) |
                     STATE2(64 * high_clock / pi->hw.sclks[R600_POWER_LEVEL_HIGH]) |
                     STATE3(64 * high_clock / pi->hw.sclks[R600_POWER_LEVEL_HIGH]));
        WREG32(SQM_RATIO, sqm_ratio);

        arb_refresh_rate =
                (POWERMODE0(calculate_memory_refresh_rate(rdev,
                                                          pi->hw.sclks[R600_POWER_LEVEL_LOW])) |
                 POWERMODE1(calculate_memory_refresh_rate(rdev,
                                                          pi->hw.sclks[R600_POWER_LEVEL_MEDIUM])) |
                 POWERMODE2(calculate_memory_refresh_rate(rdev,
                                                          pi->hw.sclks[R600_POWER_LEVEL_HIGH])) |
                 POWERMODE3(calculate_memory_refresh_rate(rdev,
                                                          pi->hw.sclks[R600_POWER_LEVEL_HIGH])));
        WREG32(ARB_RFSH_RATE, arb_refresh_rate);
}

static void rv6xx_program_mpll_timing_parameters(struct radeon_device *rdev)
{
        struct rv6xx_power_info *pi = rv6xx_get_pi(rdev);

        r600_set_mpll_lock_time(rdev, R600_MPLLLOCKTIME_DFLT *
                                pi->mpll_ref_div);
        r600_set_mpll_reset_time(rdev, R600_MPLLRESETTIME_DFLT);
}

static void rv6xx_program_bsp(struct radeon_device *rdev)
{
        struct rv6xx_power_info *pi = rv6xx_get_pi(rdev);
        u32 ref_clk = rdev->clock.spll.reference_freq;

        r600_calculate_u_and_p(R600_ASI_DFLT,
                               ref_clk, 16,
                               &pi->bsp,
                               &pi->bsu);

        r600_set_bsp(rdev, pi->bsu, pi->bsp);
}

static void rv6xx_program_at(struct radeon_device *rdev)
{
        struct rv6xx_power_info *pi = rv6xx_get_pi(rdev);

        r600_set_at(rdev,
                    (pi->hw.rp[0] * pi->bsp) / 200,
                    (pi->hw.rp[1] * pi->bsp) / 200,
                    (pi->hw.lp[2] * pi->bsp) / 200,
                    (pi->hw.lp[1] * pi->bsp) / 200);
}

static void rv6xx_program_git(struct radeon_device *rdev)
{
        r600_set_git(rdev, R600_GICST_DFLT);
}

static void rv6xx_program_tp(struct radeon_device *rdev)
{
        int i;

        for (i = 0; i < R600_PM_NUMBER_OF_TC; i++)
                r600_set_tc(rdev, i, r600_utc[i], r600_dtc[i]);

        r600_select_td(rdev, R600_TD_DFLT);
}

static void rv6xx_program_vc(struct radeon_device *rdev)
{
        r600_set_vrc(rdev, R600_VRC_DFLT);
}

static void rv6xx_clear_vc(struct radeon_device *rdev)
{
        r600_set_vrc(rdev, 0);
}

static void rv6xx_program_tpp(struct radeon_device *rdev)
{
        r600_set_tpu(rdev, R600_TPU_DFLT);
        r600_set_tpc(rdev, R600_TPC_DFLT);
}

static void rv6xx_program_sstp(struct radeon_device *rdev)
{
        r600_set_sstu(rdev, R600_SSTU_DFLT);
        r600_set_sst(rdev, R600_SST_DFLT);
}

static void rv6xx_program_fcp(struct radeon_device *rdev)
{
        r600_set_fctu(rdev, R600_FCTU_DFLT);
        r600_set_fct(rdev, R600_FCT_DFLT);
}

static void rv6xx_program_vddc3d_parameters(struct radeon_device *rdev)
{
        r600_set_vddc3d_oorsu(rdev, R600_VDDC3DOORSU_DFLT);
        r600_set_vddc3d_oorphc(rdev, R600_VDDC3DOORPHC_DFLT);
        r600_set_vddc3d_oorsdc(rdev, R600_VDDC3DOORSDC_DFLT);
        r600_set_ctxcgtt3d_rphc(rdev, R600_CTXCGTT3DRPHC_DFLT);
        r600_set_ctxcgtt3d_rsdc(rdev, R600_CTXCGTT3DRSDC_DFLT);
}

static void rv6xx_program_voltage_timing_parameters(struct radeon_device *rdev)
{
        u32 rt;

        r600_vid_rt_set_vru(rdev, R600_VRU_DFLT);

        r600_vid_rt_set_vrt(rdev,
                            rv6xx_compute_count_for_delay(rdev,
                                                          rdev->pm.dpm.voltage_response_time,
                                                          R600_VRU_DFLT));

        rt = rv6xx_compute_count_for_delay(rdev,
                                           rdev->pm.dpm.backbias_response_time,
                                           R600_VRU_DFLT);

        rv6xx_vid_response_set_brt(rdev, (rt + 0x1F) >> 5);
}

static void rv6xx_program_engine_speed_parameters(struct radeon_device *rdev)
{
        r600_vid_rt_set_ssu(rdev, R600_SPLLSTEPUNIT_DFLT);
        rv6xx_enable_engine_feedback_and_reference_sync(rdev);
}

static u64 rv6xx_get_master_voltage_mask(struct radeon_device *rdev)
{
        struct rv6xx_power_info *pi = rv6xx_get_pi(rdev);
        u64 master_mask = 0;
        int i;

        for (i = 0; i < R600_PM_NUMBER_OF_VOLTAGE_LEVELS; i++) {
                u32 tmp_mask, tmp_set_pins;
                int ret;

                ret = radeon_atom_get_voltage_gpio_settings(rdev,
                                                            pi->hw.vddc[i],
                                                            SET_VOLTAGE_TYPE_ASIC_VDDC,
                                                            &tmp_set_pins, &tmp_mask);

                if (ret == 0)
                        master_mask |= tmp_mask;
        }

        return master_mask;
}

static void rv6xx_program_voltage_gpio_pins(struct radeon_device *rdev)
{
        r600_voltage_control_enable_pins(rdev,
                                         rv6xx_get_master_voltage_mask(rdev));
}

static void rv6xx_enable_static_voltage_control(struct radeon_device *rdev,
                                                struct radeon_ps *new_ps,
                                                bool enable)
{
        struct rv6xx_ps *new_state = rv6xx_get_ps(new_ps);

        if (enable)
                radeon_atom_set_voltage(rdev,
                                        new_state->low.vddc,
                                        SET_VOLTAGE_TYPE_ASIC_VDDC);
        else
                r600_voltage_control_deactivate_static_control(rdev,
                                                               rv6xx_get_master_voltage_mask(rdev));
}

static void rv6xx_enable_display_gap(struct radeon_device *rdev, bool enable)
{
        if (enable) {
                u32 tmp = (DISP1_GAP(R600_PM_DISPLAY_GAP_VBLANK_OR_WM) |
                           DISP2_GAP(R600_PM_DISPLAY_GAP_VBLANK_OR_WM) |
                           DISP1_GAP_MCHG(R600_PM_DISPLAY_GAP_IGNORE) |
                           DISP2_GAP_MCHG(R600_PM_DISPLAY_GAP_IGNORE) |
                           VBI_TIMER_COUNT(0x3FFF) |
                           VBI_TIMER_UNIT(7));
                WREG32(CG_DISPLAY_GAP_CNTL, tmp);

                WREG32_P(MCLK_PWRMGT_CNTL, USE_DISPLAY_GAP, ~USE_DISPLAY_GAP);
        } else
                WREG32_P(MCLK_PWRMGT_CNTL, 0, ~USE_DISPLAY_GAP);
}

static void rv6xx_program_power_level_enter_state(struct radeon_device *rdev)
{
        r600_power_level_set_enter_index(rdev, R600_POWER_LEVEL_MEDIUM);
}

static void rv6xx_calculate_t(u32 l_f, u32 h_f, int h,
                              int d_l, int d_r, u8 *l, u8 *r)
{
        int a_n, a_d, h_r, l_r;

        h_r = d_l;
        l_r = 100 - d_r;

        a_n = (int)h_f * d_l + (int)l_f * (h - d_r);
        a_d = (int)l_f * l_r + (int)h_f * h_r;

        if (a_d != 0) {
                *l = d_l - h_r * a_n / a_d;
                *r = d_r + l_r * a_n / a_d;
        }
}

static void rv6xx_calculate_ap(struct radeon_device *rdev,
                               struct rv6xx_ps *state)
{
        struct rv6xx_power_info *pi = rv6xx_get_pi(rdev);

        pi->hw.lp[0] = 0;
        pi->hw.rp[R600_PM_NUMBER_OF_ACTIVITY_LEVELS - 1]
                = 100;

        rv6xx_calculate_t(state->low.sclk,
                          state->medium.sclk,
                          R600_AH_DFLT,
                          R600_LMP_DFLT,
                          R600_RLP_DFLT,
                          &pi->hw.lp[1],
                          &pi->hw.rp[0]);

        rv6xx_calculate_t(state->medium.sclk,
                          state->high.sclk,
                          R600_AH_DFLT,
                          R600_LHP_DFLT,
                          R600_RMP_DFLT,
                          &pi->hw.lp[2],
                          &pi->hw.rp[1]);

}

static void rv6xx_calculate_stepping_parameters(struct radeon_device *rdev,
                                                struct radeon_ps *new_ps)
{
        struct rv6xx_ps *new_state = rv6xx_get_ps(new_ps);

        rv6xx_calculate_engine_speed_stepping_parameters(rdev, new_state);
        rv6xx_calculate_memory_clock_stepping_parameters(rdev, new_state);
        rv6xx_calculate_voltage_stepping_parameters(rdev, new_state);
        rv6xx_calculate_ap(rdev, new_state);
}

static void rv6xx_program_stepping_parameters_except_lowest_entry(struct radeon_device *rdev)
{
        struct rv6xx_power_info *pi = rv6xx_get_pi(rdev);

        rv6xx_program_mclk_stepping_parameters_except_lowest_entry(rdev);
        if (pi->voltage_control)
                rv6xx_program_voltage_stepping_parameters_except_lowest_entry(rdev);
        rv6xx_program_backbias_stepping_parameters_except_lowest_entry(rdev);
        rv6xx_program_sclk_spread_spectrum_parameters_except_lowest_entry(rdev);
        rv6xx_program_mclk_spread_spectrum_parameters(rdev);
        rv6xx_program_memory_timing_parameters(rdev);
}

static void rv6xx_program_stepping_parameters_lowest_entry(struct radeon_device *rdev)
{
        struct rv6xx_power_info *pi = rv6xx_get_pi(rdev);

        rv6xx_program_mclk_stepping_parameters_lowest_entry(rdev);
        if (pi->voltage_control)
                rv6xx_program_voltage_stepping_parameters_lowest_entry(rdev);
        rv6xx_program_backbias_stepping_parameters_lowest_entry(rdev);
        rv6xx_program_sclk_spread_spectrum_parameters_lowest_entry(rdev);
}

static void rv6xx_program_power_level_low(struct radeon_device *rdev)
{
        struct rv6xx_power_info *pi = rv6xx_get_pi(rdev);

        r600_power_level_set_voltage_index(rdev, R600_POWER_LEVEL_LOW,
                                           pi->hw.low_vddc_index);
        r600_power_level_set_mem_clock_index(rdev, R600_POWER_LEVEL_LOW,
                                             pi->hw.low_mclk_index);
        r600_power_level_set_eng_clock_index(rdev, R600_POWER_LEVEL_LOW,
                                             pi->hw.low_sclk_index);
        r600_power_level_set_watermark_id(rdev, R600_POWER_LEVEL_LOW,
                                          R600_DISPLAY_WATERMARK_LOW);
        r600_power_level_set_pcie_gen2(rdev, R600_POWER_LEVEL_LOW,
                                       pi->hw.pcie_gen2[R600_POWER_LEVEL_LOW]);
}

static void rv6xx_program_power_level_low_to_lowest_state(struct radeon_device *rdev)
{
        struct rv6xx_power_info *pi = rv6xx_get_pi(rdev);

        r600_power_level_set_voltage_index(rdev, R600_POWER_LEVEL_LOW, 0);
        r600_power_level_set_mem_clock_index(rdev, R600_POWER_LEVEL_LOW, 0);
        r600_power_level_set_eng_clock_index(rdev, R600_POWER_LEVEL_LOW, 0);

        r600_power_level_set_watermark_id(rdev, R600_POWER_LEVEL_LOW,
                                          R600_DISPLAY_WATERMARK_LOW);

        r600_power_level_set_pcie_gen2(rdev, R600_POWER_LEVEL_LOW,
                                       pi->hw.pcie_gen2[R600_POWER_LEVEL_LOW]);

}

static void rv6xx_program_power_level_medium(struct radeon_device *rdev)
{
        struct rv6xx_power_info *pi = rv6xx_get_pi(rdev);

        r600_power_level_set_voltage_index(rdev, R600_POWER_LEVEL_MEDIUM,
                                          pi->hw.medium_vddc_index);
        r600_power_level_set_mem_clock_index(rdev, R600_POWER_LEVEL_MEDIUM,
                                            pi->hw.medium_mclk_index);
        r600_power_level_set_eng_clock_index(rdev, R600_POWER_LEVEL_MEDIUM,
                                            pi->hw.medium_sclk_index);
        r600_power_level_set_watermark_id(rdev, R600_POWER_LEVEL_MEDIUM,
                                         R600_DISPLAY_WATERMARK_LOW);
        r600_power_level_set_pcie_gen2(rdev, R600_POWER_LEVEL_MEDIUM,
                                      pi->hw.pcie_gen2[R600_POWER_LEVEL_MEDIUM]);
}

static void rv6xx_program_power_level_medium_for_transition(struct radeon_device *rdev)
{
        struct rv6xx_power_info *pi = rv6xx_get_pi(rdev);

        rv6xx_program_mclk_stepping_entry(rdev,
                                          R600_POWER_LEVEL_CTXSW,
                                          pi->hw.mclks[pi->hw.low_mclk_index]);

        r600_power_level_set_voltage_index(rdev, R600_POWER_LEVEL_MEDIUM, 1);

        r600_power_level_set_mem_clock_index(rdev, R600_POWER_LEVEL_MEDIUM,
                                             R600_POWER_LEVEL_CTXSW);
        r600_power_level_set_eng_clock_index(rdev, R600_POWER_LEVEL_MEDIUM,
                                             pi->hw.medium_sclk_index);

        r600_power_level_set_watermark_id(rdev, R600_POWER_LEVEL_MEDIUM,
                                          R600_DISPLAY_WATERMARK_LOW);

        rv6xx_enable_engine_spread_spectrum(rdev, R600_POWER_LEVEL_MEDIUM, false);

        r600_power_level_set_pcie_gen2(rdev, R600_POWER_LEVEL_MEDIUM,
                                       pi->hw.pcie_gen2[R600_POWER_LEVEL_LOW]);
}

static void rv6xx_program_power_level_high(struct radeon_device *rdev)
{
        struct rv6xx_power_info *pi = rv6xx_get_pi(rdev);

        r600_power_level_set_voltage_index(rdev, R600_POWER_LEVEL_HIGH,
                                           pi->hw.high_vddc_index);
        r600_power_level_set_mem_clock_index(rdev, R600_POWER_LEVEL_HIGH,
                                             pi->hw.high_mclk_index);
        r600_power_level_set_eng_clock_index(rdev, R600_POWER_LEVEL_HIGH,
                                             pi->hw.high_sclk_index);

        r600_power_level_set_watermark_id(rdev, R600_POWER_LEVEL_HIGH,
                                          R600_DISPLAY_WATERMARK_HIGH);

        r600_power_level_set_pcie_gen2(rdev, R600_POWER_LEVEL_HIGH,
                                       pi->hw.pcie_gen2[R600_POWER_LEVEL_HIGH]);
}

static void rv6xx_enable_backbias(struct radeon_device *rdev, bool enable)
{
        if (enable)
                WREG32_P(GENERAL_PWRMGT, BACKBIAS_PAD_EN | BACKBIAS_DPM_CNTL,
                         ~(BACKBIAS_PAD_EN | BACKBIAS_DPM_CNTL));
        else
                WREG32_P(GENERAL_PWRMGT, 0,
                         ~(BACKBIAS_VALUE | BACKBIAS_PAD_EN | BACKBIAS_DPM_CNTL));
}

static void rv6xx_program_display_gap(struct radeon_device *rdev)
{
        u32 tmp = RREG32(CG_DISPLAY_GAP_CNTL);

        tmp &= ~(DISP1_GAP_MCHG_MASK | DISP2_GAP_MCHG_MASK);
        if (rdev->pm.dpm.new_active_crtcs & 1) {
                tmp |= DISP1_GAP_MCHG(R600_PM_DISPLAY_GAP_VBLANK);
                tmp |= DISP2_GAP_MCHG(R600_PM_DISPLAY_GAP_IGNORE);
        } else if (rdev->pm.dpm.new_active_crtcs & 2) {
                tmp |= DISP1_GAP_MCHG(R600_PM_DISPLAY_GAP_IGNORE);
                tmp |= DISP2_GAP_MCHG(R600_PM_DISPLAY_GAP_VBLANK);
        } else {
                tmp |= DISP1_GAP_MCHG(R600_PM_DISPLAY_GAP_IGNORE);
                tmp |= DISP2_GAP_MCHG(R600_PM_DISPLAY_GAP_IGNORE);
        }
        WREG32(CG_DISPLAY_GAP_CNTL, tmp);
}

static void rv6xx_set_sw_voltage_to_safe(struct radeon_device *rdev,
                                         struct radeon_ps *new_ps,
                                         struct radeon_ps *old_ps)
{
        struct rv6xx_ps *new_state = rv6xx_get_ps(new_ps);
        struct rv6xx_ps *old_state = rv6xx_get_ps(old_ps);
        u16 safe_voltage;

        safe_voltage = (new_state->low.vddc >= old_state->low.vddc) ?
                new_state->low.vddc : old_state->low.vddc;

        rv6xx_program_voltage_stepping_entry(rdev, R600_POWER_LEVEL_CTXSW,
                                             safe_voltage);

        WREG32_P(GENERAL_PWRMGT, SW_GPIO_INDEX(R600_POWER_LEVEL_CTXSW),
                 ~SW_GPIO_INDEX_MASK);
}

static void rv6xx_set_sw_voltage_to_low(struct radeon_device *rdev,
                                        struct radeon_ps *old_ps)
{
        struct rv6xx_ps *old_state = rv6xx_get_ps(old_ps);

        rv6xx_program_voltage_stepping_entry(rdev, R600_POWER_LEVEL_CTXSW,
                                             old_state->low.vddc);

        WREG32_P(GENERAL_PWRMGT, SW_GPIO_INDEX(R600_POWER_LEVEL_CTXSW),
                ~SW_GPIO_INDEX_MASK);
}

static void rv6xx_set_safe_backbias(struct radeon_device *rdev,
                                    struct radeon_ps *new_ps,
                                    struct radeon_ps *old_ps)
{
        struct rv6xx_ps *new_state = rv6xx_get_ps(new_ps);
        struct rv6xx_ps *old_state = rv6xx_get_ps(old_ps);

        if ((new_state->low.flags & ATOM_PPLIB_R600_FLAGS_BACKBIASENABLE) &&
            (old_state->low.flags & ATOM_PPLIB_R600_FLAGS_BACKBIASENABLE))
                WREG32_P(GENERAL_PWRMGT, BACKBIAS_VALUE, ~BACKBIAS_VALUE);
        else
                WREG32_P(GENERAL_PWRMGT, 0, ~BACKBIAS_VALUE);
}

static void rv6xx_set_safe_pcie_gen2(struct radeon_device *rdev,
                                     struct radeon_ps *new_ps,
                                     struct radeon_ps *old_ps)
{
        struct rv6xx_ps *new_state = rv6xx_get_ps(new_ps);
        struct rv6xx_ps *old_state = rv6xx_get_ps(old_ps);

        if ((new_state->low.flags & ATOM_PPLIB_R600_FLAGS_PCIEGEN2) !=
            (old_state->low.flags & ATOM_PPLIB_R600_FLAGS_PCIEGEN2))
                rv6xx_force_pcie_gen1(rdev);
}

static void rv6xx_enable_dynamic_voltage_control(struct radeon_device *rdev,
                                                 bool enable)
{
        if (enable)
                WREG32_P(GENERAL_PWRMGT, VOLT_PWRMGT_EN, ~VOLT_PWRMGT_EN);
        else
                WREG32_P(GENERAL_PWRMGT, 0, ~VOLT_PWRMGT_EN);
}

static void rv6xx_enable_dynamic_backbias_control(struct radeon_device *rdev,
                                                  bool enable)
{
        if (enable)
                WREG32_P(GENERAL_PWRMGT, BACKBIAS_DPM_CNTL, ~BACKBIAS_DPM_CNTL);
        else
                WREG32_P(GENERAL_PWRMGT, 0, ~BACKBIAS_DPM_CNTL);
}

static int rv6xx_step_sw_voltage(struct radeon_device *rdev,
                                 u16 initial_voltage,
                                 u16 target_voltage)
{
        u16 current_voltage;
        u16 true_target_voltage;
        u16 voltage_step;
        int signed_voltage_step;

        if ((radeon_atom_get_voltage_step(rdev, SET_VOLTAGE_TYPE_ASIC_VDDC,
                                          &voltage_step)) ||
            (radeon_atom_round_to_true_voltage(rdev, SET_VOLTAGE_TYPE_ASIC_VDDC,
                                               initial_voltage, &current_voltage)) ||
            (radeon_atom_round_to_true_voltage(rdev, SET_VOLTAGE_TYPE_ASIC_VDDC,
                                               target_voltage, &true_target_voltage)))
                return -EINVAL;

        if (true_target_voltage < current_voltage)
                signed_voltage_step = -(int)voltage_step;
        else
                signed_voltage_step = voltage_step;

        while (current_voltage != true_target_voltage) {
                current_voltage += signed_voltage_step;
                rv6xx_program_voltage_stepping_entry(rdev, R600_POWER_LEVEL_CTXSW,
                                                     current_voltage);
                msleep((rdev->pm.dpm.voltage_response_time + 999) / 1000);
        }

        return 0;
}

static int rv6xx_step_voltage_if_increasing(struct radeon_device *rdev,
                                            struct radeon_ps *new_ps,
                                            struct radeon_ps *old_ps)
{
        struct rv6xx_ps *new_state = rv6xx_get_ps(new_ps);
        struct rv6xx_ps *old_state = rv6xx_get_ps(old_ps);

        if (new_state->low.vddc > old_state->low.vddc)
                return rv6xx_step_sw_voltage(rdev,
                                             old_state->low.vddc,
                                             new_state->low.vddc);

        return 0;
}

static int rv6xx_step_voltage_if_decreasing(struct radeon_device *rdev,
                                            struct radeon_ps *new_ps,
                                            struct radeon_ps *old_ps)
{
        struct rv6xx_ps *new_state = rv6xx_get_ps(new_ps);
        struct rv6xx_ps *old_state = rv6xx_get_ps(old_ps);

        if (new_state->low.vddc < old_state->low.vddc)
                return rv6xx_step_sw_voltage(rdev,
                                             old_state->low.vddc,
                                             new_state->low.vddc);
        else
                return 0;
}

static void rv6xx_enable_high(struct radeon_device *rdev)
{
        struct rv6xx_power_info *pi = rv6xx_get_pi(rdev);

        if ((pi->restricted_levels < 1) ||
            (pi->restricted_levels == 3))
                r600_power_level_enable(rdev, R600_POWER_LEVEL_HIGH, true);
}

static void rv6xx_enable_medium(struct radeon_device *rdev)
{
        struct rv6xx_power_info *pi = rv6xx_get_pi(rdev);

        if (pi->restricted_levels < 2)
                r600_power_level_enable(rdev, R600_POWER_LEVEL_MEDIUM, true);
}

static void rv6xx_set_dpm_event_sources(struct radeon_device *rdev, u32 sources)
{
        struct rv6xx_power_info *pi = rv6xx_get_pi(rdev);
        bool want_thermal_protection;
        enum radeon_dpm_event_src dpm_event_src;

        switch (sources) {
        case 0:
        default:
                want_thermal_protection = false;
                break;
        case (1 << RADEON_DPM_AUTO_THROTTLE_SRC_THERMAL):
                want_thermal_protection = true;
                dpm_event_src = RADEON_DPM_EVENT_SRC_DIGITAL;
                break;

        case (1 << RADEON_DPM_AUTO_THROTTLE_SRC_EXTERNAL):
                want_thermal_protection = true;
                dpm_event_src = RADEON_DPM_EVENT_SRC_EXTERNAL;
                break;

        case ((1 << RADEON_DPM_AUTO_THROTTLE_SRC_EXTERNAL) |
              (1 << RADEON_DPM_AUTO_THROTTLE_SRC_THERMAL)):
                        want_thermal_protection = true;
                dpm_event_src = RADEON_DPM_EVENT_SRC_DIGIAL_OR_EXTERNAL;
                break;
        }

        if (want_thermal_protection) {
                WREG32_P(CG_THERMAL_CTRL, DPM_EVENT_SRC(dpm_event_src), ~DPM_EVENT_SRC_MASK);
                if (pi->thermal_protection)
                        WREG32_P(GENERAL_PWRMGT, 0, ~THERMAL_PROTECTION_DIS);
        } else {
                WREG32_P(GENERAL_PWRMGT, THERMAL_PROTECTION_DIS, ~THERMAL_PROTECTION_DIS);
        }
}

static void rv6xx_enable_auto_throttle_source(struct radeon_device *rdev,
                                              enum radeon_dpm_auto_throttle_src source,
                                              bool enable)
{
        struct rv6xx_power_info *pi = rv6xx_get_pi(rdev);

        if (enable) {
                if (!(pi->active_auto_throttle_sources & (1 << source))) {
                        pi->active_auto_throttle_sources |= 1 << source;
                        rv6xx_set_dpm_event_sources(rdev, pi->active_auto_throttle_sources);
                }
        } else {
                if (pi->active_auto_throttle_sources & (1 << source)) {
                        pi->active_auto_throttle_sources &= ~(1 << source);
                        rv6xx_set_dpm_event_sources(rdev, pi->active_auto_throttle_sources);
                }
        }
}


static void rv6xx_enable_thermal_protection(struct radeon_device *rdev,
                                            bool enable)
{
        struct rv6xx_power_info *pi = rv6xx_get_pi(rdev);

        if (pi->active_auto_throttle_sources)
                r600_enable_thermal_protection(rdev, enable);
}

static void rv6xx_generate_transition_stepping(struct radeon_device *rdev,
                                               struct radeon_ps *new_ps,
                                               struct radeon_ps *old_ps)
{
        struct rv6xx_ps *new_state = rv6xx_get_ps(new_ps);
        struct rv6xx_ps *old_state = rv6xx_get_ps(old_ps);
        struct rv6xx_power_info *pi = rv6xx_get_pi(rdev);

        rv6xx_generate_steps(rdev,
                             old_state->low.sclk,
                             new_state->low.sclk,
                             0, &pi->hw.medium_sclk_index);
}

static void rv6xx_generate_low_step(struct radeon_device *rdev,
                                    struct radeon_ps *new_ps)
{
        struct rv6xx_ps *new_state = rv6xx_get_ps(new_ps);
        struct rv6xx_power_info *pi = rv6xx_get_pi(rdev);

        pi->hw.low_sclk_index = 0;
        rv6xx_generate_single_step(rdev,
                                   new_state->low.sclk,
                                   0);
}

static void rv6xx_invalidate_intermediate_steps(struct radeon_device *rdev)
{
        struct rv6xx_power_info *pi = rv6xx_get_pi(rdev);

        rv6xx_invalidate_intermediate_steps_range(rdev, 0,
                                                  pi->hw.medium_sclk_index);
}

static void rv6xx_generate_stepping_table(struct radeon_device *rdev,
                                          struct radeon_ps *new_ps)
{
        struct rv6xx_ps *new_state = rv6xx_get_ps(new_ps);
        struct rv6xx_power_info *pi = rv6xx_get_pi(rdev);

        pi->hw.low_sclk_index = 0;

        rv6xx_generate_steps(rdev,
                             new_state->low.sclk,
                             new_state->medium.sclk,
                             0,
                             &pi->hw.medium_sclk_index);
        rv6xx_generate_steps(rdev,
                             new_state->medium.sclk,
                             new_state->high.sclk,
                             pi->hw.medium_sclk_index,
                             &pi->hw.high_sclk_index);
}

static void rv6xx_enable_spread_spectrum(struct radeon_device *rdev,
                                         bool enable)
{
        if (enable)
                rv6xx_enable_dynamic_spread_spectrum(rdev, true);
        else {
                rv6xx_enable_engine_spread_spectrum(rdev, R600_POWER_LEVEL_LOW, false);
                rv6xx_enable_engine_spread_spectrum(rdev, R600_POWER_LEVEL_MEDIUM, false);
                rv6xx_enable_engine_spread_spectrum(rdev, R600_POWER_LEVEL_HIGH, false);
                rv6xx_enable_dynamic_spread_spectrum(rdev, false);
                rv6xx_enable_memory_spread_spectrum(rdev, false);
        }
}

static void rv6xx_reset_lvtm_data_sync(struct radeon_device *rdev)
{
        if (ASIC_IS_DCE3(rdev))
                WREG32_P(DCE3_LVTMA_DATA_SYNCHRONIZATION, LVTMA_PFREQCHG, ~LVTMA_PFREQCHG);
        else
                WREG32_P(LVTMA_DATA_SYNCHRONIZATION, LVTMA_PFREQCHG, ~LVTMA_PFREQCHG);
}

static void rv6xx_enable_dynamic_pcie_gen2(struct radeon_device *rdev,
                                           struct radeon_ps *new_ps,
                                           bool enable)
{
        struct rv6xx_ps *new_state = rv6xx_get_ps(new_ps);

        if (enable) {
                rv6xx_enable_bif_dynamic_pcie_gen2(rdev, true);
                rv6xx_enable_pcie_gen2_support(rdev);
                r600_enable_dynamic_pcie_gen2(rdev, true);
        } else {
                if (!(new_state->low.flags & ATOM_PPLIB_R600_FLAGS_PCIEGEN2))
                        rv6xx_force_pcie_gen1(rdev);
                rv6xx_enable_bif_dynamic_pcie_gen2(rdev, false);
                r600_enable_dynamic_pcie_gen2(rdev, false);
        }
}

static void rv6xx_set_uvd_clock_before_set_eng_clock(struct radeon_device *rdev,
                                                     struct radeon_ps *new_ps,
                                                     struct radeon_ps *old_ps)
{
        struct rv6xx_ps *new_state = rv6xx_get_ps(new_ps);
        struct rv6xx_ps *current_state = rv6xx_get_ps(old_ps);

        if ((new_ps->vclk == old_ps->vclk) &&
            (new_ps->dclk == old_ps->dclk))
                return;

        if (new_state->high.sclk >= current_state->high.sclk)
                return;

        radeon_set_uvd_clocks(rdev, new_ps->vclk, new_ps->dclk);
}

static void rv6xx_set_uvd_clock_after_set_eng_clock(struct radeon_device *rdev,
                                                    struct radeon_ps *new_ps,
                                                    struct radeon_ps *old_ps)
{
        struct rv6xx_ps *new_state = rv6xx_get_ps(new_ps);
        struct rv6xx_ps *current_state = rv6xx_get_ps(old_ps);

        if ((new_ps->vclk == old_ps->vclk) &&
            (new_ps->dclk == old_ps->dclk))
                return;

        if (new_state->high.sclk < current_state->high.sclk)
                return;

        radeon_set_uvd_clocks(rdev, new_ps->vclk, new_ps->dclk);
}

int rv6xx_dpm_enable(struct radeon_device *rdev)
{
        struct rv6xx_power_info *pi = rv6xx_get_pi(rdev);
        struct radeon_ps *boot_ps = rdev->pm.dpm.boot_ps;

        if (r600_dynamicpm_enabled(rdev))
                return -EINVAL;

        if (rdev->pm.dpm.platform_caps & ATOM_PP_PLATFORM_CAP_BACKBIAS)
                rv6xx_enable_backbias(rdev, true);

        if (pi->dynamic_ss)
                rv6xx_enable_spread_spectrum(rdev, true);

        rv6xx_program_mpll_timing_parameters(rdev);
        rv6xx_program_bsp(rdev);
        rv6xx_program_git(rdev);
        rv6xx_program_tp(rdev);
        rv6xx_program_tpp(rdev);
        rv6xx_program_sstp(rdev);
        rv6xx_program_fcp(rdev);
        rv6xx_program_vddc3d_parameters(rdev);
        rv6xx_program_voltage_timing_parameters(rdev);
        rv6xx_program_engine_speed_parameters(rdev);

        rv6xx_enable_display_gap(rdev, true);
        if (pi->display_gap == false)
                rv6xx_enable_display_gap(rdev, false);

        rv6xx_program_power_level_enter_state(rdev);

        rv6xx_calculate_stepping_parameters(rdev, boot_ps);

        if (pi->voltage_control)
                rv6xx_program_voltage_gpio_pins(rdev);

        rv6xx_generate_stepping_table(rdev, boot_ps);

        rv6xx_program_stepping_parameters_except_lowest_entry(rdev);
        rv6xx_program_stepping_parameters_lowest_entry(rdev);

        rv6xx_program_power_level_low(rdev);
        rv6xx_program_power_level_medium(rdev);
        rv6xx_program_power_level_high(rdev);
        rv6xx_program_vc(rdev);
        rv6xx_program_at(rdev);

        r600_power_level_enable(rdev, R600_POWER_LEVEL_LOW, true);
        r600_power_level_enable(rdev, R600_POWER_LEVEL_MEDIUM, true);
        r600_power_level_enable(rdev, R600_POWER_LEVEL_HIGH, true);

        rv6xx_enable_auto_throttle_source(rdev, RADEON_DPM_AUTO_THROTTLE_SRC_THERMAL, true);

        r600_start_dpm(rdev);

        if (pi->voltage_control)
                rv6xx_enable_static_voltage_control(rdev, boot_ps, false);

        if (pi->dynamic_pcie_gen2)
                rv6xx_enable_dynamic_pcie_gen2(rdev, boot_ps, true);

        if (pi->gfx_clock_gating)
                r600_gfx_clockgating_enable(rdev, true);

        return 0;
}

void rv6xx_dpm_disable(struct radeon_device *rdev)
{
        struct rv6xx_power_info *pi = rv6xx_get_pi(rdev);
        struct radeon_ps *boot_ps = rdev->pm.dpm.boot_ps;

        if (!r600_dynamicpm_enabled(rdev))
                return;

        r600_power_level_enable(rdev, R600_POWER_LEVEL_LOW, true);
        r600_power_level_enable(rdev, R600_POWER_LEVEL_MEDIUM, true);
        rv6xx_enable_display_gap(rdev, false);
        rv6xx_clear_vc(rdev);
        r600_set_at(rdev, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF);

        if (pi->thermal_protection)
                r600_enable_thermal_protection(rdev, false);

        r600_wait_for_power_level(rdev, R600_POWER_LEVEL_LOW);
        r600_power_level_enable(rdev, R600_POWER_LEVEL_HIGH, false);
        r600_power_level_enable(rdev, R600_POWER_LEVEL_MEDIUM, false);

        if (rdev->pm.dpm.platform_caps & ATOM_PP_PLATFORM_CAP_BACKBIAS)
                rv6xx_enable_backbias(rdev, false);

        rv6xx_enable_spread_spectrum(rdev, false);

        if (pi->voltage_control)
                rv6xx_enable_static_voltage_control(rdev, boot_ps, true);

        if (pi->dynamic_pcie_gen2)
                rv6xx_enable_dynamic_pcie_gen2(rdev, boot_ps, false);

        if (rdev->irq.installed &&
            r600_is_internal_thermal_sensor(rdev->pm.int_thermal_type)) {
                rdev->irq.dpm_thermal = false;
                radeon_irq_set(rdev);
        }

        if (pi->gfx_clock_gating)
                r600_gfx_clockgating_enable(rdev, false);

        r600_stop_dpm(rdev);
}

int rv6xx_dpm_set_power_state(struct radeon_device *rdev)
{
        struct rv6xx_power_info *pi = rv6xx_get_pi(rdev);
        struct radeon_ps *new_ps = rdev->pm.dpm.requested_ps;
        struct radeon_ps *old_ps = rdev->pm.dpm.current_ps;
        int ret;

        pi->restricted_levels = 0;

        rv6xx_set_uvd_clock_before_set_eng_clock(rdev, new_ps, old_ps);

        rv6xx_clear_vc(rdev);
        r600_power_level_enable(rdev, R600_POWER_LEVEL_LOW, true);
        r600_set_at(rdev, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF);

        if (pi->thermal_protection)
                r600_enable_thermal_protection(rdev, false);

        r600_wait_for_power_level(rdev, R600_POWER_LEVEL_LOW);
        r600_power_level_enable(rdev, R600_POWER_LEVEL_HIGH, false);
        r600_power_level_enable(rdev, R600_POWER_LEVEL_MEDIUM, false);

        rv6xx_generate_transition_stepping(rdev, new_ps, old_ps);
        rv6xx_program_power_level_medium_for_transition(rdev);

        if (pi->voltage_control) {
                rv6xx_set_sw_voltage_to_safe(rdev, new_ps, old_ps);
                if (rdev->pm.dpm.platform_caps & ATOM_PP_PLATFORM_CAP_STEPVDDC)
                        rv6xx_set_sw_voltage_to_low(rdev, old_ps);
        }

        if (rdev->pm.dpm.platform_caps & ATOM_PP_PLATFORM_CAP_BACKBIAS)
                rv6xx_set_safe_backbias(rdev, new_ps, old_ps);

        if (pi->dynamic_pcie_gen2)
                rv6xx_set_safe_pcie_gen2(rdev, new_ps, old_ps);

        if (pi->voltage_control)
                rv6xx_enable_dynamic_voltage_control(rdev, false);

        if (rdev->pm.dpm.platform_caps & ATOM_PP_PLATFORM_CAP_BACKBIAS)
                rv6xx_enable_dynamic_backbias_control(rdev, false);

        if (pi->voltage_control) {
                if (rdev->pm.dpm.platform_caps & ATOM_PP_PLATFORM_CAP_STEPVDDC)
                        rv6xx_step_voltage_if_increasing(rdev, new_ps, old_ps);
                msleep((rdev->pm.dpm.voltage_response_time + 999) / 1000);
        }

        r600_power_level_enable(rdev, R600_POWER_LEVEL_MEDIUM, true);
        r600_power_level_enable(rdev, R600_POWER_LEVEL_LOW, false);
        r600_wait_for_power_level_unequal(rdev, R600_POWER_LEVEL_LOW);

        rv6xx_generate_low_step(rdev, new_ps);
        rv6xx_invalidate_intermediate_steps(rdev);
        rv6xx_calculate_stepping_parameters(rdev, new_ps);
        rv6xx_program_stepping_parameters_lowest_entry(rdev);
        rv6xx_program_power_level_low_to_lowest_state(rdev);

        r600_power_level_enable(rdev, R600_POWER_LEVEL_LOW, true);
        r600_wait_for_power_level(rdev, R600_POWER_LEVEL_LOW);
        r600_power_level_enable(rdev, R600_POWER_LEVEL_MEDIUM, false);

        if (pi->voltage_control) {
                if (rdev->pm.dpm.platform_caps & ATOM_PP_PLATFORM_CAP_STEPVDDC) {
                        ret = rv6xx_step_voltage_if_decreasing(rdev, new_ps, old_ps);
                        if (ret)
                                return ret;
                }
                rv6xx_enable_dynamic_voltage_control(rdev, true);
        }

        if (rdev->pm.dpm.platform_caps & ATOM_PP_PLATFORM_CAP_BACKBIAS)
                rv6xx_enable_dynamic_backbias_control(rdev, true);

        if (pi->dynamic_pcie_gen2)
                rv6xx_enable_dynamic_pcie_gen2(rdev, new_ps, true);

        rv6xx_reset_lvtm_data_sync(rdev);

        rv6xx_generate_stepping_table(rdev, new_ps);
        rv6xx_program_stepping_parameters_except_lowest_entry(rdev);
        rv6xx_program_power_level_low(rdev);
        rv6xx_program_power_level_medium(rdev);
        rv6xx_program_power_level_high(rdev);
        rv6xx_enable_medium(rdev);
        rv6xx_enable_high(rdev);

        if (pi->thermal_protection)
                rv6xx_enable_thermal_protection(rdev, true);
        rv6xx_program_vc(rdev);
        rv6xx_program_at(rdev);

        rv6xx_set_uvd_clock_after_set_eng_clock(rdev, new_ps, old_ps);

        return 0;
}

void rv6xx_setup_asic(struct radeon_device *rdev)
{
        r600_enable_acpi_pm(rdev);

        if (radeon_aspm != 0) {
                if (rdev->pm.dpm.platform_caps & ATOM_PP_PLATFORM_CAP_ASPM_L0s)
                        rv6xx_enable_l0s(rdev);
                if (rdev->pm.dpm.platform_caps & ATOM_PP_PLATFORM_CAP_ASPM_L1)
                        rv6xx_enable_l1(rdev);
                if (rdev->pm.dpm.platform_caps & ATOM_PP_PLATFORM_CAP_TURNOFFPLL_ASPML1)
                        rv6xx_enable_pll_sleep_in_l1(rdev);
        }
}

void rv6xx_dpm_display_configuration_changed(struct radeon_device *rdev)
{
        rv6xx_program_display_gap(rdev);
}

union power_info {
        struct _ATOM_POWERPLAY_INFO info;
        struct _ATOM_POWERPLAY_INFO_V2 info_2;
        struct _ATOM_POWERPLAY_INFO_V3 info_3;
        struct _ATOM_PPLIB_POWERPLAYTABLE pplib;
        struct _ATOM_PPLIB_POWERPLAYTABLE2 pplib2;
        struct _ATOM_PPLIB_POWERPLAYTABLE3 pplib3;
};

union pplib_clock_info {
        struct _ATOM_PPLIB_R600_CLOCK_INFO r600;
        struct _ATOM_PPLIB_RS780_CLOCK_INFO rs780;
        struct _ATOM_PPLIB_EVERGREEN_CLOCK_INFO evergreen;
        struct _ATOM_PPLIB_SUMO_CLOCK_INFO sumo;
};

union pplib_power_state {
        struct _ATOM_PPLIB_STATE v1;
        struct _ATOM_PPLIB_STATE_V2 v2;
};

static void rv6xx_parse_pplib_non_clock_info(struct radeon_device *rdev,
                                             struct radeon_ps *rps,
                                             struct _ATOM_PPLIB_NONCLOCK_INFO *non_clock_info)
{
        rps->caps = le32_to_cpu(non_clock_info->ulCapsAndSettings);
        rps->class = le16_to_cpu(non_clock_info->usClassification);
        rps->class2 = le16_to_cpu(non_clock_info->usClassification2);

        if (r600_is_uvd_state(rps->class, rps->class2)) {
                rps->vclk = RV6XX_DEFAULT_VCLK_FREQ;
                rps->dclk = RV6XX_DEFAULT_DCLK_FREQ;
        } else {
                rps->vclk = 0;
                rps->dclk = 0;
        }

        if (rps->class & ATOM_PPLIB_CLASSIFICATION_BOOT)
                rdev->pm.dpm.boot_ps = rps;
        if (rps->class & ATOM_PPLIB_CLASSIFICATION_UVDSTATE)
                rdev->pm.dpm.uvd_ps = rps;
}

static void rv6xx_parse_pplib_clock_info(struct radeon_device *rdev,
                                         struct radeon_ps *rps, int index,
                                         union pplib_clock_info *clock_info)
{
        struct rv6xx_ps *ps = rv6xx_get_ps(rps);
        u32 sclk, mclk;
        u16 vddc;
        struct rv6xx_pl *pl;

        switch (index) {
        case 0:
                pl = &ps->low;
                break;
        case 1:
                pl = &ps->medium;
                break;
        case 2:
        default:
                pl = &ps->high;
                break;
        }

        sclk = le16_to_cpu(clock_info->r600.usEngineClockLow);
        sclk |= clock_info->r600.ucEngineClockHigh << 16;
        mclk = le16_to_cpu(clock_info->r600.usMemoryClockLow);
        mclk |= clock_info->r600.ucMemoryClockHigh << 16;

        pl->mclk = mclk;
        pl->sclk = sclk;
        pl->vddc = le16_to_cpu(clock_info->r600.usVDDC);
        pl->flags = le32_to_cpu(clock_info->r600.ulFlags);

        /* patch up vddc if necessary */
        if (pl->vddc == 0xff01) {
                if (radeon_atom_get_max_vddc(rdev, 0, 0, &vddc) == 0)
                        pl->vddc = vddc;
        }

        /* fix up pcie gen2 */
        if (pl->flags & ATOM_PPLIB_R600_FLAGS_PCIEGEN2) {
                if ((rdev->family == CHIP_RV610) || (rdev->family == CHIP_RV630)) {
                        if (pl->vddc < 1100)
                                pl->flags &= ~ATOM_PPLIB_R600_FLAGS_PCIEGEN2;
                }
        }

        /* patch up boot state */
        if (rps->class & ATOM_PPLIB_CLASSIFICATION_BOOT) {
                u16 vddc, vddci, mvdd;
                radeon_atombios_get_default_voltages(rdev, &vddc, &vddci, &mvdd);
                pl->mclk = rdev->clock.default_mclk;
                pl->sclk = rdev->clock.default_sclk;
                pl->vddc = vddc;
        }
}

static int rv6xx_parse_power_table(struct radeon_device *rdev)
{
        struct radeon_mode_info *mode_info = &rdev->mode_info;
        struct _ATOM_PPLIB_NONCLOCK_INFO *non_clock_info;
        union pplib_power_state *power_state;
        int i, j;
        union pplib_clock_info *clock_info;
        union power_info *power_info;
        int index = GetIndexIntoMasterTable(DATA, PowerPlayInfo);
        u16 data_offset;
        u8 frev, crev;
        struct rv6xx_ps *ps;

        if (!atom_parse_data_header(mode_info->atom_context, index, NULL,
                                   &frev, &crev, &data_offset))
                return -EINVAL;
        power_info = (union power_info *)(mode_info->atom_context->bios + data_offset);

        rdev->pm.dpm.ps = kzalloc_objs(struct radeon_ps,
                                       power_info->pplib.ucNumStates);
        if (!rdev->pm.dpm.ps)
                return -ENOMEM;

        for (i = 0; i < power_info->pplib.ucNumStates; i++) {
                power_state = (union pplib_power_state *)
                        (mode_info->atom_context->bios + data_offset +
                         le16_to_cpu(power_info->pplib.usStateArrayOffset) +
                         i * power_info->pplib.ucStateEntrySize);
                non_clock_info = (struct _ATOM_PPLIB_NONCLOCK_INFO *)
                        (mode_info->atom_context->bios + data_offset +
                         le16_to_cpu(power_info->pplib.usNonClockInfoArrayOffset) +
                         (power_state->v1.ucNonClockStateIndex *
                          power_info->pplib.ucNonClockSize));
                if (power_info->pplib.ucStateEntrySize - 1) {
                        u8 *idx;
                        ps = kzalloc_obj(struct rv6xx_ps);
                        if (ps == NULL) {
                                kfree(rdev->pm.dpm.ps);
                                return -ENOMEM;
                        }
                        rdev->pm.dpm.ps[i].ps_priv = ps;
                        rv6xx_parse_pplib_non_clock_info(rdev, &rdev->pm.dpm.ps[i],
                                                         non_clock_info);
                        idx = (u8 *)&power_state->v1.ucClockStateIndices[0];
                        for (j = 0; j < (power_info->pplib.ucStateEntrySize - 1); j++) {
                                clock_info = (union pplib_clock_info *)
                                        (mode_info->atom_context->bios + data_offset +
                                         le16_to_cpu(power_info->pplib.usClockInfoArrayOffset) +
                                         (idx[j] * power_info->pplib.ucClockInfoSize));
                                rv6xx_parse_pplib_clock_info(rdev,
                                                             &rdev->pm.dpm.ps[i], j,
                                                             clock_info);
                        }
                }
        }
        rdev->pm.dpm.num_ps = power_info->pplib.ucNumStates;
        return 0;
}

int rv6xx_dpm_init(struct radeon_device *rdev)
{
        struct radeon_atom_ss ss;
        struct atom_clock_dividers dividers;
        struct rv6xx_power_info *pi;
        int ret;

        pi = kzalloc_obj(struct rv6xx_power_info);
        if (pi == NULL)
                return -ENOMEM;
        rdev->pm.dpm.priv = pi;

        ret = r600_get_platform_caps(rdev);
        if (ret)
                return ret;

        ret = rv6xx_parse_power_table(rdev);
        if (ret)
                return ret;

        if (rdev->pm.dpm.voltage_response_time == 0)
                rdev->pm.dpm.voltage_response_time = R600_VOLTAGERESPONSETIME_DFLT;
        if (rdev->pm.dpm.backbias_response_time == 0)
                rdev->pm.dpm.backbias_response_time = R600_BACKBIASRESPONSETIME_DFLT;

        ret = radeon_atom_get_clock_dividers(rdev, COMPUTE_ENGINE_PLL_PARAM,
                                             0, false, &dividers);
        if (ret)
                pi->spll_ref_div = dividers.ref_div + 1;
        else
                pi->spll_ref_div = R600_REFERENCEDIVIDER_DFLT;

        ret = radeon_atom_get_clock_dividers(rdev, COMPUTE_MEMORY_PLL_PARAM,
                                             0, false, &dividers);
        if (ret)
                pi->mpll_ref_div = dividers.ref_div + 1;
        else
                pi->mpll_ref_div = R600_REFERENCEDIVIDER_DFLT;

        if (rdev->family >= CHIP_RV670)
                pi->fb_div_scale = 1;
        else
                pi->fb_div_scale = 0;

        pi->voltage_control =
                radeon_atom_is_voltage_gpio(rdev, SET_VOLTAGE_TYPE_ASIC_VDDC, 0);

        pi->gfx_clock_gating = true;

        pi->sclk_ss = radeon_atombios_get_asic_ss_info(rdev, &ss,
                                                       ASIC_INTERNAL_ENGINE_SS, 0);
        pi->mclk_ss = radeon_atombios_get_asic_ss_info(rdev, &ss,
                                                       ASIC_INTERNAL_MEMORY_SS, 0);

        /* Disable sclk ss, causes hangs on a lot of systems */
        pi->sclk_ss = false;

        if (pi->sclk_ss || pi->mclk_ss)
                pi->dynamic_ss = true;
        else
                pi->dynamic_ss = false;

        pi->dynamic_pcie_gen2 = true;

        if (pi->gfx_clock_gating &&
            (rdev->pm.int_thermal_type != THERMAL_TYPE_NONE))
                pi->thermal_protection = true;
        else
                pi->thermal_protection = false;

        pi->display_gap = true;

        return 0;
}

void rv6xx_dpm_print_power_state(struct radeon_device *rdev,
                                 struct radeon_ps *rps)
{
        struct rv6xx_ps *ps = rv6xx_get_ps(rps);
        struct rv6xx_pl *pl;

        r600_dpm_print_class_info(rps->class, rps->class2);
        r600_dpm_print_cap_info(rps->caps);
        printk("\tuvd    vclk: %d dclk: %d\n", rps->vclk, rps->dclk);
        pl = &ps->low;
        printk("\t\tpower level 0    sclk: %u mclk: %u vddc: %u\n",
               pl->sclk, pl->mclk, pl->vddc);
        pl = &ps->medium;
        printk("\t\tpower level 1    sclk: %u mclk: %u vddc: %u\n",
               pl->sclk, pl->mclk, pl->vddc);
        pl = &ps->high;
        printk("\t\tpower level 2    sclk: %u mclk: %u vddc: %u\n",
               pl->sclk, pl->mclk, pl->vddc);
        r600_dpm_print_ps_status(rdev, rps);
}

void rv6xx_dpm_debugfs_print_current_performance_level(struct radeon_device *rdev,
                                                       struct seq_file *m)
{
        struct radeon_ps *rps = rdev->pm.dpm.current_ps;
        struct rv6xx_ps *ps = rv6xx_get_ps(rps);
        struct rv6xx_pl *pl;
        u32 current_index =
                (RREG32(TARGET_AND_CURRENT_PROFILE_INDEX) & CURRENT_PROFILE_INDEX_MASK) >>
                CURRENT_PROFILE_INDEX_SHIFT;

        if (current_index > 2) {
                seq_printf(m, "invalid dpm profile %d\n", current_index);
        } else {
                if (current_index == 0)
                        pl = &ps->low;
                else if (current_index == 1)
                        pl = &ps->medium;
                else /* current_index == 2 */
                        pl = &ps->high;
                seq_printf(m, "uvd    vclk: %d dclk: %d\n", rps->vclk, rps->dclk);
                seq_printf(m, "power level %d    sclk: %u mclk: %u vddc: %u\n",
                           current_index, pl->sclk, pl->mclk, pl->vddc);
        }
}

/* get the current sclk in 10 khz units */
u32 rv6xx_dpm_get_current_sclk(struct radeon_device *rdev)
{
        struct radeon_ps *rps = rdev->pm.dpm.current_ps;
        struct rv6xx_ps *ps = rv6xx_get_ps(rps);
        struct rv6xx_pl *pl;
        u32 current_index =
                (RREG32(TARGET_AND_CURRENT_PROFILE_INDEX) & CURRENT_PROFILE_INDEX_MASK) >>
                CURRENT_PROFILE_INDEX_SHIFT;

        if (current_index > 2) {
                return 0;
        } else {
                if (current_index == 0)
                        pl = &ps->low;
                else if (current_index == 1)
                        pl = &ps->medium;
                else /* current_index == 2 */
                        pl = &ps->high;
                return pl->sclk;
        }
}

/* get the current mclk in 10 khz units */
u32 rv6xx_dpm_get_current_mclk(struct radeon_device *rdev)
{
        struct radeon_ps *rps = rdev->pm.dpm.current_ps;
        struct rv6xx_ps *ps = rv6xx_get_ps(rps);
        struct rv6xx_pl *pl;
        u32 current_index =
                (RREG32(TARGET_AND_CURRENT_PROFILE_INDEX) & CURRENT_PROFILE_INDEX_MASK) >>
                CURRENT_PROFILE_INDEX_SHIFT;

        if (current_index > 2) {
                return 0;
        } else {
                if (current_index == 0)
                        pl = &ps->low;
                else if (current_index == 1)
                        pl = &ps->medium;
                else /* current_index == 2 */
                        pl = &ps->high;
                return pl->mclk;
        }
}

void rv6xx_dpm_fini(struct radeon_device *rdev)
{
        int i;

        for (i = 0; i < rdev->pm.dpm.num_ps; i++) {
                kfree(rdev->pm.dpm.ps[i].ps_priv);
        }
        kfree(rdev->pm.dpm.ps);
        kfree(rdev->pm.dpm.priv);
}

u32 rv6xx_dpm_get_sclk(struct radeon_device *rdev, bool low)
{
        struct rv6xx_ps *requested_state = rv6xx_get_ps(rdev->pm.dpm.requested_ps);

        if (low)
                return requested_state->low.sclk;
        else
                return requested_state->high.sclk;
}

u32 rv6xx_dpm_get_mclk(struct radeon_device *rdev, bool low)
{
        struct rv6xx_ps *requested_state = rv6xx_get_ps(rdev->pm.dpm.requested_ps);

        if (low)
                return requested_state->low.mclk;
        else
                return requested_state->high.mclk;
}

int rv6xx_dpm_force_performance_level(struct radeon_device *rdev,
                                      enum radeon_dpm_forced_level level)
{
        struct rv6xx_power_info *pi = rv6xx_get_pi(rdev);

        if (level == RADEON_DPM_FORCED_LEVEL_HIGH) {
                pi->restricted_levels = 3;
        } else if (level == RADEON_DPM_FORCED_LEVEL_LOW) {
                pi->restricted_levels = 2;
        } else {
                pi->restricted_levels = 0;
        }

        rv6xx_clear_vc(rdev);
        r600_power_level_enable(rdev, R600_POWER_LEVEL_LOW, true);
        r600_set_at(rdev, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF);
        r600_wait_for_power_level(rdev, R600_POWER_LEVEL_LOW);
        r600_power_level_enable(rdev, R600_POWER_LEVEL_HIGH, false);
        r600_power_level_enable(rdev, R600_POWER_LEVEL_MEDIUM, false);
        rv6xx_enable_medium(rdev);
        rv6xx_enable_high(rdev);
        if (pi->restricted_levels == 3)
                r600_power_level_enable(rdev, R600_POWER_LEVEL_LOW, false);
        rv6xx_program_vc(rdev);
        rv6xx_program_at(rdev);

        rdev->pm.dpm.forced_level = level;

        return 0;
}