drm/radeon/kms: add dpm support for rs780/rs880

This adds dpm support for rs780/rs880 asics. This includes:
- clockgating
- dynamic engine clock scaling
- dynamic voltage scaling

set radeon.dpm=1 to enable it.

Signed-off-by: Alex Deucher <[e-mail]>

drivers/gpu/drm/radeon/Makefile

···
 	evergreen_hdmi.o radeon_trace_points.o ni.o cayman_blit_shaders.o \
 	atombios_encoders.o radeon_semaphore.o radeon_sa.o atombios_i2c.o si.o \
 	si_blit_shaders.o radeon_prime.o radeon_uvd.o cik.o cik_blit_shaders.o \
-	r600_dpm.o
+	r600_dpm.o rs780_dpm.o
 
 radeon-$(CONFIG_COMPAT) += radeon_ioc32.o
 radeon-$(CONFIG_VGA_SWITCHEROO) += radeon_atpx_handler.o

drivers/gpu/drm/radeon/radeon_asic.c

···
 		.set_clock_gating = NULL,
 		.get_temperature = &rv6xx_get_temp,
 	},
+	.dpm = {
+		.init = &rs780_dpm_init,
+		.setup_asic = &rs780_dpm_setup_asic,
+		.enable = &rs780_dpm_enable,
+		.disable = &rs780_dpm_disable,
+		.set_power_state = &rs780_dpm_set_power_state,
+		.display_configuration_changed = &rs780_dpm_display_configuration_changed,
+		.fini = &rs780_dpm_fini,
+		.get_sclk = &rs780_dpm_get_sclk,
+		.get_mclk = &rs780_dpm_get_mclk,
+		.print_power_state = &rs780_dpm_print_power_state,
+	},
 	.pflip = {
 		.pre_page_flip = &rs600_pre_page_flip,
 		.page_flip = &rs600_page_flip,

drivers/gpu/drm/radeon/radeon_asic.h

···
 u32 r600_get_xclk(struct radeon_device *rdev);
 uint64_t r600_get_gpu_clock_counter(struct radeon_device *rdev);
 int rv6xx_get_temp(struct radeon_device *rdev);
+/* rs780 dpm */
+int rs780_dpm_init(struct radeon_device *rdev);
+int rs780_dpm_enable(struct radeon_device *rdev);
+void rs780_dpm_disable(struct radeon_device *rdev);
+int rs780_dpm_set_power_state(struct radeon_device *rdev);
+void rs780_dpm_setup_asic(struct radeon_device *rdev);
+void rs780_dpm_display_configuration_changed(struct radeon_device *rdev);
+void rs780_dpm_fini(struct radeon_device *rdev);
+u32 rs780_dpm_get_sclk(struct radeon_device *rdev, bool low);
+u32 rs780_dpm_get_mclk(struct radeon_device *rdev, bool low);
+void rs780_dpm_print_power_state(struct radeon_device *rdev,
+				 struct radeon_ps *ps);
 
 /* uvd */
 int r600_uvd_init(struct radeon_device *rdev);

drivers/gpu/drm/radeon/radeon_pm.c

···
 {
 	/* enable dpm on rv6xx+ */
 	switch (rdev->family) {
+	case CHIP_RS780:
+	case CHIP_RS880:
+		if (radeon_dpm == 1)
+			rdev->pm.pm_method = PM_METHOD_DPM;
+		else
+			rdev->pm.pm_method = PM_METHOD_PROFILE;
+		break;
 	default:
 		/* default to profile method */
 		rdev->pm.pm_method = PM_METHOD_PROFILE;

drivers/gpu/drm/radeon/rs780_dpm.c

···
+/*
+ * 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 "drmP.h"
+#include "radeon.h"
+#include "rs780d.h"
+#include "r600_dpm.h"
+#include "rs780_dpm.h"
+#include "atom.h"
+
+static struct igp_ps *rs780_get_ps(struct radeon_ps *rps)
+{
+	struct igp_ps *ps = rps->ps_priv;
+
+	return ps;
+}
+
+static struct igp_power_info *rs780_get_pi(struct radeon_device *rdev)
+{
+	struct igp_power_info *pi = rdev->pm.dpm.priv;
+
+	return pi;
+}
+
+static void rs780_get_pm_mode_parameters(struct radeon_device *rdev)
+{
+	struct igp_power_info *pi = rs780_get_pi(rdev);
+	struct radeon_mode_info *minfo = &rdev->mode_info;
+	struct drm_crtc *crtc;
+	struct radeon_crtc *radeon_crtc;
+	int i;
+
+	/* defaults */
+	pi->crtc_id = 0;
+	pi->refresh_rate = 60;
+
+	for (i = 0; i < rdev->num_crtc; i++) {
+		crtc = (struct drm_crtc *)minfo->crtcs[i];
+		if (crtc && crtc->enabled) {
+			radeon_crtc = to_radeon_crtc(crtc);
+			pi->crtc_id = radeon_crtc->crtc_id;
+			if (crtc->mode.htotal && crtc->mode.vtotal)
+				pi->refresh_rate =
+					(crtc->mode.clock * 1000) /
+					(crtc->mode.htotal * crtc->mode.vtotal);
+			break;
+		}
+	}
+}
+
+static void rs780_voltage_scaling_enable(struct radeon_device *rdev, bool enable);
+
+static int rs780_initialize_dpm_power_state(struct radeon_device *rdev)
+{
+	struct atom_clock_dividers dividers;
+	struct igp_ps *default_state = rs780_get_ps(rdev->pm.dpm.boot_ps);
+	int i, ret;
+
+	ret = radeon_atom_get_clock_dividers(rdev, COMPUTE_ENGINE_PLL_PARAM,
+					     default_state->sclk_low, false, &dividers);
+	if (ret)
+		return ret;
+
+	r600_engine_clock_entry_set_reference_divider(rdev, 0, dividers.ref_div);
+	r600_engine_clock_entry_set_feedback_divider(rdev, 0, dividers.fb_div);
+	r600_engine_clock_entry_set_post_divider(rdev, 0, dividers.post_div);
+
+	if (dividers.enable_post_div)
+		r600_engine_clock_entry_enable_post_divider(rdev, 0, true);
+	else
+		r600_engine_clock_entry_enable_post_divider(rdev, 0, false);
+
+	r600_engine_clock_entry_set_step_time(rdev, 0, R600_SST_DFLT);
+	r600_engine_clock_entry_enable_pulse_skipping(rdev, 0, false);
+
+	r600_engine_clock_entry_enable(rdev, 0, true);
+	for (i = 1; i < R600_PM_NUMBER_OF_SCLKS; i++)
+		r600_engine_clock_entry_enable(rdev, i, false);
+
+	r600_enable_mclk_control(rdev, false);
+	r600_voltage_control_enable_pins(rdev, 0);
+
+	return 0;
+}
+
+static int rs780_initialize_dpm_parameters(struct radeon_device *rdev)
+{
+	int ret = 0;
+	int i;
+
+	r600_set_bsp(rdev, R600_BSU_DFLT, R600_BSP_DFLT);
+
+	r600_set_at(rdev, 0, 0, 0, 0);
+
+	r600_set_git(rdev, R600_GICST_DFLT);
+
+	for (i = 0; i < R600_PM_NUMBER_OF_TC; i++)
+		r600_set_tc(rdev, i, 0, 0);
+
+	r600_select_td(rdev, R600_TD_DFLT);
+	r600_set_vrc(rdev, 0);
+
+	r600_set_tpu(rdev, R600_TPU_DFLT);
+	r600_set_tpc(rdev, R600_TPC_DFLT);
+
+	r600_set_sstu(rdev, R600_SSTU_DFLT);
+	r600_set_sst(rdev, R600_SST_DFLT);
+
+	r600_set_fctu(rdev, R600_FCTU_DFLT);
+	r600_set_fct(rdev, R600_FCT_DFLT);
+
+	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);
+
+	r600_vid_rt_set_vru(rdev, R600_VRU_DFLT);
+	r600_vid_rt_set_vrt(rdev, R600_VOLTAGERESPONSETIME_DFLT);
+	r600_vid_rt_set_ssu(rdev, R600_SPLLSTEPUNIT_DFLT);
+
+	ret = rs780_initialize_dpm_power_state(rdev);
+
+	r600_power_level_set_voltage_index(rdev, R600_POWER_LEVEL_LOW,     0);
+	r600_power_level_set_voltage_index(rdev, R600_POWER_LEVEL_MEDIUM,  0);
+	r600_power_level_set_voltage_index(rdev, R600_POWER_LEVEL_HIGH,    0);
+
+	r600_power_level_set_mem_clock_index(rdev, R600_POWER_LEVEL_LOW,    0);
+	r600_power_level_set_mem_clock_index(rdev, R600_POWER_LEVEL_MEDIUM, 0);
+	r600_power_level_set_mem_clock_index(rdev, R600_POWER_LEVEL_HIGH,   0);
+
+	r600_power_level_set_eng_clock_index(rdev, R600_POWER_LEVEL_LOW,    0);
+	r600_power_level_set_eng_clock_index(rdev, R600_POWER_LEVEL_MEDIUM, 0);
+	r600_power_level_set_eng_clock_index(rdev, R600_POWER_LEVEL_HIGH,   0);
+
+	r600_power_level_set_watermark_id(rdev, R600_POWER_LEVEL_LOW,    R600_DISPLAY_WATERMARK_HIGH);
+	r600_power_level_set_watermark_id(rdev, R600_POWER_LEVEL_MEDIUM, R600_DISPLAY_WATERMARK_HIGH);
+	r600_power_level_set_watermark_id(rdev, R600_POWER_LEVEL_HIGH,   R600_DISPLAY_WATERMARK_HIGH);
+
+	r600_power_level_enable(rdev, R600_POWER_LEVEL_CTXSW, false);
+	r600_power_level_enable(rdev, R600_POWER_LEVEL_HIGH, false);
+	r600_power_level_enable(rdev, R600_POWER_LEVEL_MEDIUM, false);
+	r600_power_level_enable(rdev, R600_POWER_LEVEL_LOW, true);
+
+	r600_power_level_set_enter_index(rdev, R600_POWER_LEVEL_LOW);
+
+	r600_set_vrc(rdev, RS780_CGFTV_DFLT);
+
+	return ret;
+}
+
+static void rs780_start_dpm(struct radeon_device *rdev)
+{
+	r600_enable_sclk_control(rdev, false);
+	r600_enable_mclk_control(rdev, false);
+
+	r600_dynamicpm_enable(rdev, true);
+
+	radeon_wait_for_vblank(rdev, 0);
+	radeon_wait_for_vblank(rdev, 1);
+
+	r600_enable_spll_bypass(rdev, true);
+	r600_wait_for_spll_change(rdev);
+	r600_enable_spll_bypass(rdev, false);
+	r600_wait_for_spll_change(rdev);
+
+	r600_enable_spll_bypass(rdev, true);
+	r600_wait_for_spll_change(rdev);
+	r600_enable_spll_bypass(rdev, false);
+	r600_wait_for_spll_change(rdev);
+
+	r600_enable_sclk_control(rdev, true);
+}
+
+
+static void rs780_preset_ranges_slow_clk_fbdiv_en(struct radeon_device *rdev)
+{
+	WREG32_P(FVTHROT_SLOW_CLK_FEEDBACK_DIV_REG1, RANGE_SLOW_CLK_FEEDBACK_DIV_EN,
+		 ~RANGE_SLOW_CLK_FEEDBACK_DIV_EN);
+
+	WREG32_P(FVTHROT_SLOW_CLK_FEEDBACK_DIV_REG1,
+		 RANGE0_SLOW_CLK_FEEDBACK_DIV(RS780_SLOWCLKFEEDBACKDIV_DFLT),
+		 ~RANGE0_SLOW_CLK_FEEDBACK_DIV_MASK);
+}
+
+static void rs780_preset_starting_fbdiv(struct radeon_device *rdev)
+{
+	u32 fbdiv = (RREG32(CG_SPLL_FUNC_CNTL) & SPLL_FB_DIV_MASK) >> SPLL_FB_DIV_SHIFT;
+
+	WREG32_P(FVTHROT_FBDIV_REG1, STARTING_FEEDBACK_DIV(fbdiv),
+		 ~STARTING_FEEDBACK_DIV_MASK);
+
+	WREG32_P(FVTHROT_FBDIV_REG2, FORCED_FEEDBACK_DIV(fbdiv),
+		 ~FORCED_FEEDBACK_DIV_MASK);
+
+	WREG32_P(FVTHROT_FBDIV_REG1, FORCE_FEEDBACK_DIV, ~FORCE_FEEDBACK_DIV);
+}
+
+static void rs780_voltage_scaling_init(struct radeon_device *rdev)
+{
+	struct igp_power_info *pi = rs780_get_pi(rdev);
+	struct drm_device *dev = rdev->ddev;
+	u32 fv_throt_pwm_fb_div_range[3];
+	u32 fv_throt_pwm_range[4];
+
+	if (dev->pdev->device == 0x9614) {
+		fv_throt_pwm_fb_div_range[0] = RS780D_FVTHROTPWMFBDIVRANGEREG0_DFLT;
+		fv_throt_pwm_fb_div_range[1] = RS780D_FVTHROTPWMFBDIVRANGEREG1_DFLT;
+		fv_throt_pwm_fb_div_range[2] = RS780D_FVTHROTPWMFBDIVRANGEREG2_DFLT;
+	} else if ((dev->pdev->device == 0x9714) ||
+		   (dev->pdev->device == 0x9715)) {
+		fv_throt_pwm_fb_div_range[0] = RS880D_FVTHROTPWMFBDIVRANGEREG0_DFLT;
+		fv_throt_pwm_fb_div_range[1] = RS880D_FVTHROTPWMFBDIVRANGEREG1_DFLT;
+		fv_throt_pwm_fb_div_range[2] = RS880D_FVTHROTPWMFBDIVRANGEREG2_DFLT;
+	} else {
+		fv_throt_pwm_fb_div_range[0] = RS780_FVTHROTPWMFBDIVRANGEREG0_DFLT;
+		fv_throt_pwm_fb_div_range[1] = RS780_FVTHROTPWMFBDIVRANGEREG1_DFLT;
+		fv_throt_pwm_fb_div_range[2] = RS780_FVTHROTPWMFBDIVRANGEREG2_DFLT;
+	}
+
+	if (pi->pwm_voltage_control) {
+		fv_throt_pwm_range[0] = pi->min_voltage;
+		fv_throt_pwm_range[1] = pi->min_voltage;
+		fv_throt_pwm_range[2] = pi->max_voltage;
+		fv_throt_pwm_range[3] = pi->max_voltage;
+	} else {
+		fv_throt_pwm_range[0] = pi->invert_pwm_required ?
+			RS780_FVTHROTPWMRANGE3_GPIO_DFLT : RS780_FVTHROTPWMRANGE0_GPIO_DFLT;
+		fv_throt_pwm_range[1] = pi->invert_pwm_required ?
+			RS780_FVTHROTPWMRANGE2_GPIO_DFLT : RS780_FVTHROTPWMRANGE1_GPIO_DFLT;
+		fv_throt_pwm_range[2] = pi->invert_pwm_required ?
+			RS780_FVTHROTPWMRANGE1_GPIO_DFLT : RS780_FVTHROTPWMRANGE2_GPIO_DFLT;
+		fv_throt_pwm_range[3] = pi->invert_pwm_required ?
+			RS780_FVTHROTPWMRANGE0_GPIO_DFLT : RS780_FVTHROTPWMRANGE3_GPIO_DFLT;
+	}
+
+	WREG32_P(FVTHROT_PWM_CTRL_REG0,
+		 STARTING_PWM_HIGHTIME(pi->max_voltage),
+		 ~STARTING_PWM_HIGHTIME_MASK);
+
+	WREG32_P(FVTHROT_PWM_CTRL_REG0,
+		 NUMBER_OF_CYCLES_IN_PERIOD(pi->num_of_cycles_in_period),
+		 ~NUMBER_OF_CYCLES_IN_PERIOD_MASK);
+
+	WREG32_P(FVTHROT_PWM_CTRL_REG0, FORCE_STARTING_PWM_HIGHTIME,
+		 ~FORCE_STARTING_PWM_HIGHTIME);
+
+	if (pi->invert_pwm_required)
+		WREG32_P(FVTHROT_PWM_CTRL_REG0, INVERT_PWM_WAVEFORM, ~INVERT_PWM_WAVEFORM);
+	else
+		WREG32_P(FVTHROT_PWM_CTRL_REG0, 0, ~INVERT_PWM_WAVEFORM);
+
+	rs780_voltage_scaling_enable(rdev, true);
+
+	WREG32(FVTHROT_PWM_CTRL_REG1,
+	       (MIN_PWM_HIGHTIME(pi->min_voltage) |
+		MAX_PWM_HIGHTIME(pi->max_voltage)));
+
+	WREG32(FVTHROT_PWM_US_REG0, RS780_FVTHROTPWMUSREG0_DFLT);
+	WREG32(FVTHROT_PWM_US_REG1, RS780_FVTHROTPWMUSREG1_DFLT);
+	WREG32(FVTHROT_PWM_DS_REG0, RS780_FVTHROTPWMDSREG0_DFLT);
+	WREG32(FVTHROT_PWM_DS_REG1, RS780_FVTHROTPWMDSREG1_DFLT);
+
+	WREG32_P(FVTHROT_PWM_FEEDBACK_DIV_REG1,
+		 RANGE0_PWM_FEEDBACK_DIV(fv_throt_pwm_fb_div_range[0]),
+		 ~RANGE0_PWM_FEEDBACK_DIV_MASK);
+
+	WREG32(FVTHROT_PWM_FEEDBACK_DIV_REG2,
+	       (RANGE1_PWM_FEEDBACK_DIV(fv_throt_pwm_fb_div_range[1]) |
+		RANGE2_PWM_FEEDBACK_DIV(fv_throt_pwm_fb_div_range[2])));
+
+	WREG32(FVTHROT_PWM_FEEDBACK_DIV_REG3,
+	       (RANGE0_PWM(fv_throt_pwm_range[1]) |
+		RANGE1_PWM(fv_throt_pwm_range[2])));
+	WREG32(FVTHROT_PWM_FEEDBACK_DIV_REG4,
+	       (RANGE2_PWM(fv_throt_pwm_range[1]) |
+		RANGE3_PWM(fv_throt_pwm_range[2])));
+}
+
+static void rs780_clk_scaling_enable(struct radeon_device *rdev, bool enable)
+{
+	if (enable)
+		WREG32_P(FVTHROT_CNTRL_REG, ENABLE_FV_THROT | ENABLE_FV_UPDATE,
+			 ~(ENABLE_FV_THROT | ENABLE_FV_UPDATE));
+	else
+		WREG32_P(FVTHROT_CNTRL_REG, 0,
+			 ~(ENABLE_FV_THROT | ENABLE_FV_UPDATE));
+}
+
+static void rs780_voltage_scaling_enable(struct radeon_device *rdev, bool enable)
+{
+	if (enable)
+		WREG32_P(FVTHROT_CNTRL_REG, ENABLE_FV_THROT_IO, ~ENABLE_FV_THROT_IO);
+	else
+		WREG32_P(FVTHROT_CNTRL_REG, 0, ~ENABLE_FV_THROT_IO);
+}
+
+static void rs780_set_engine_clock_wfc(struct radeon_device *rdev)
+{
+	WREG32(FVTHROT_UTC0, RS780_FVTHROTUTC0_DFLT);
+	WREG32(FVTHROT_UTC1, RS780_FVTHROTUTC1_DFLT);
+	WREG32(FVTHROT_UTC2, RS780_FVTHROTUTC2_DFLT);
+	WREG32(FVTHROT_UTC3, RS780_FVTHROTUTC3_DFLT);
+	WREG32(FVTHROT_UTC4, RS780_FVTHROTUTC4_DFLT);
+
+	WREG32(FVTHROT_DTC0, RS780_FVTHROTDTC0_DFLT);
+	WREG32(FVTHROT_DTC1, RS780_FVTHROTDTC1_DFLT);
+	WREG32(FVTHROT_DTC2, RS780_FVTHROTDTC2_DFLT);
+	WREG32(FVTHROT_DTC3, RS780_FVTHROTDTC3_DFLT);
+	WREG32(FVTHROT_DTC4, RS780_FVTHROTDTC4_DFLT);
+}
+
+static void rs780_set_engine_clock_sc(struct radeon_device *rdev)
+{
+	WREG32_P(FVTHROT_FBDIV_REG2,
+		 FB_DIV_TIMER_VAL(RS780_FBDIVTIMERVAL_DFLT),
+		 ~FB_DIV_TIMER_VAL_MASK);
+
+	WREG32_P(FVTHROT_CNTRL_REG,
+		 REFRESH_RATE_DIVISOR(0) | MINIMUM_CIP(0xf),
+		 ~(REFRESH_RATE_DIVISOR_MASK | MINIMUM_CIP_MASK));
+}
+
+static void rs780_set_engine_clock_tdc(struct radeon_device *rdev)
+{
+	WREG32_P(FVTHROT_CNTRL_REG, 0, ~(FORCE_TREND_SEL | TREND_SEL_MODE));
+}
+
+static void rs780_set_engine_clock_ssc(struct radeon_device *rdev)
+{
+	WREG32(FVTHROT_FB_US_REG0, RS780_FVTHROTFBUSREG0_DFLT);
+	WREG32(FVTHROT_FB_US_REG1, RS780_FVTHROTFBUSREG1_DFLT);
+	WREG32(FVTHROT_FB_DS_REG0, RS780_FVTHROTFBDSREG0_DFLT);
+	WREG32(FVTHROT_FB_DS_REG1, RS780_FVTHROTFBDSREG1_DFLT);
+
+	WREG32_P(FVTHROT_FBDIV_REG1, MAX_FEEDBACK_STEP(1), ~MAX_FEEDBACK_STEP_MASK);
+}
+
+static void rs780_program_at(struct radeon_device *rdev)
+{
+	struct igp_power_info *pi = rs780_get_pi(rdev);
+
+	WREG32(FVTHROT_TARGET_REG, 30000000 / pi->refresh_rate);
+	WREG32(FVTHROT_CB1, 1000000 * 5 / pi->refresh_rate);
+	WREG32(FVTHROT_CB2, 1000000 * 10 / pi->refresh_rate);
+	WREG32(FVTHROT_CB3, 1000000 * 30 / pi->refresh_rate);
+	WREG32(FVTHROT_CB4, 1000000 * 50 / pi->refresh_rate);
+}
+
+static void rs780_disable_vbios_powersaving(struct radeon_device *rdev)
+{
+	WREG32_P(CG_INTGFX_MISC, 0, ~0xFFF00000);
+}
+
+static void rs780_force_voltage_to_high(struct radeon_device *rdev)
+{
+	struct igp_power_info *pi = rs780_get_pi(rdev);
+	struct igp_ps *current_state = rs780_get_ps(rdev->pm.dpm.current_ps);
+
+	if ((current_state->max_voltage == RS780_VDDC_LEVEL_HIGH) &&
+	    (current_state->min_voltage == RS780_VDDC_LEVEL_HIGH))
+		return;
+
+	WREG32_P(GFX_MACRO_BYPASS_CNTL, SPLL_BYPASS_CNTL, ~SPLL_BYPASS_CNTL);
+
+	udelay(1);
+
+	WREG32_P(FVTHROT_PWM_CTRL_REG0,
+		 STARTING_PWM_HIGHTIME(pi->max_voltage),
+		 ~STARTING_PWM_HIGHTIME_MASK);
+
+	WREG32_P(FVTHROT_PWM_CTRL_REG0,
+		 FORCE_STARTING_PWM_HIGHTIME, ~FORCE_STARTING_PWM_HIGHTIME);
+
+	WREG32_P(FVTHROT_PWM_FEEDBACK_DIV_REG1, 0,
+		~RANGE_PWM_FEEDBACK_DIV_EN);
+
+	udelay(1);
+
+	WREG32_P(GFX_MACRO_BYPASS_CNTL, 0, ~SPLL_BYPASS_CNTL);
+}
+
+static int rs780_set_engine_clock_scaling(struct radeon_device *rdev)
+{
+	struct atom_clock_dividers min_dividers, max_dividers, current_max_dividers;
+	struct igp_ps *new_state = rs780_get_ps(rdev->pm.dpm.requested_ps);
+	struct igp_ps *old_state = rs780_get_ps(rdev->pm.dpm.current_ps);
+	int ret;
+
+	if ((new_state->sclk_high == old_state->sclk_high) &&
+	    (new_state->sclk_low == old_state->sclk_low))
+		return 0;
+
+	ret = radeon_atom_get_clock_dividers(rdev, COMPUTE_ENGINE_PLL_PARAM,
+					     new_state->sclk_low, false, &min_dividers);
+	if (ret)
+		return ret;
+
+	ret = radeon_atom_get_clock_dividers(rdev, COMPUTE_ENGINE_PLL_PARAM,
+					     new_state->sclk_high, false, &max_dividers);
+	if (ret)
+		return ret;
+
+	ret = radeon_atom_get_clock_dividers(rdev, COMPUTE_ENGINE_PLL_PARAM,
+					     old_state->sclk_high, false, &current_max_dividers);
+	if (ret)
+		return ret;
+
+	WREG32_P(GFX_MACRO_BYPASS_CNTL, SPLL_BYPASS_CNTL, ~SPLL_BYPASS_CNTL);
+
+	WREG32_P(FVTHROT_FBDIV_REG2, FORCED_FEEDBACK_DIV(max_dividers.fb_div),
+		 ~FORCED_FEEDBACK_DIV_MASK);
+	WREG32_P(FVTHROT_FBDIV_REG1, STARTING_FEEDBACK_DIV(max_dividers.fb_div),
+		 ~STARTING_FEEDBACK_DIV_MASK);
+	WREG32_P(FVTHROT_FBDIV_REG1, FORCE_FEEDBACK_DIV, ~FORCE_FEEDBACK_DIV);
+
+	udelay(100);
+
+	WREG32_P(GFX_MACRO_BYPASS_CNTL, 0, ~SPLL_BYPASS_CNTL);
+
+	if (max_dividers.fb_div > min_dividers.fb_div) {
+		WREG32_P(FVTHROT_FBDIV_REG0,
+			 MIN_FEEDBACK_DIV(min_dividers.fb_div) |
+			 MAX_FEEDBACK_DIV(max_dividers.fb_div),
+			 ~(MIN_FEEDBACK_DIV_MASK | MAX_FEEDBACK_DIV_MASK));
+
+		WREG32_P(FVTHROT_FBDIV_REG1, 0, ~FORCE_FEEDBACK_DIV);
+	}
+
+	return 0;
+}
+
+static void rs780_set_engine_clock_spc(struct radeon_device *rdev)
+{
+	struct igp_ps *new_state = rs780_get_ps(rdev->pm.dpm.requested_ps);
+	struct igp_ps *old_state = rs780_get_ps(rdev->pm.dpm.current_ps);
+	struct igp_power_info *pi = rs780_get_pi(rdev);
+
+	if ((new_state->sclk_high == old_state->sclk_high) &&
+	    (new_state->sclk_low == old_state->sclk_low))
+		return;
+
+	if (pi->crtc_id == 0)
+		WREG32_P(CG_INTGFX_MISC, 0, ~FVTHROT_VBLANK_SEL);
+	else
+		WREG32_P(CG_INTGFX_MISC, FVTHROT_VBLANK_SEL, ~FVTHROT_VBLANK_SEL);
+
+}
+
+static void rs780_activate_engine_clk_scaling(struct radeon_device *rdev)
+{
+	struct igp_ps *new_state = rs780_get_ps(rdev->pm.dpm.requested_ps);
+	struct igp_ps *old_state = rs780_get_ps(rdev->pm.dpm.current_ps);
+
+	if ((new_state->sclk_high == old_state->sclk_high) &&
+	    (new_state->sclk_low == old_state->sclk_low))
+		return;
+
+	rs780_clk_scaling_enable(rdev, true);
+}
+
+static u32 rs780_get_voltage_for_vddc_level(struct radeon_device *rdev,
+					    enum rs780_vddc_level vddc)
+{
+	struct igp_power_info *pi = rs780_get_pi(rdev);
+
+	if (vddc == RS780_VDDC_LEVEL_HIGH)
+		return pi->max_voltage;
+	else if (vddc == RS780_VDDC_LEVEL_LOW)
+		return pi->min_voltage;
+	else
+		return pi->max_voltage;
+}
+
+static void rs780_enable_voltage_scaling(struct radeon_device *rdev)
+{
+	struct igp_ps *new_state = rs780_get_ps(rdev->pm.dpm.requested_ps);
+	struct igp_power_info *pi = rs780_get_pi(rdev);
+	enum rs780_vddc_level vddc_high, vddc_low;
+
+	udelay(100);
+
+	if ((new_state->max_voltage == RS780_VDDC_LEVEL_HIGH) &&
+	    (new_state->min_voltage == RS780_VDDC_LEVEL_HIGH))
+		return;
+
+	vddc_high = rs780_get_voltage_for_vddc_level(rdev,
+						     new_state->max_voltage);
+	vddc_low = rs780_get_voltage_for_vddc_level(rdev,
+						    new_state->min_voltage);
+
+	WREG32_P(GFX_MACRO_BYPASS_CNTL, SPLL_BYPASS_CNTL, ~SPLL_BYPASS_CNTL);
+
+	udelay(1);
+	if (vddc_high > vddc_low) {
+		WREG32_P(FVTHROT_PWM_FEEDBACK_DIV_REG1,
+			 RANGE_PWM_FEEDBACK_DIV_EN, ~RANGE_PWM_FEEDBACK_DIV_EN);
+
+		WREG32_P(FVTHROT_PWM_CTRL_REG0, 0, ~FORCE_STARTING_PWM_HIGHTIME);
+	} else if (vddc_high == vddc_low) {
+		if (pi->max_voltage != vddc_high) {
+			WREG32_P(FVTHROT_PWM_CTRL_REG0,
+				 STARTING_PWM_HIGHTIME(vddc_high),
+				 ~STARTING_PWM_HIGHTIME_MASK);
+
+			WREG32_P(FVTHROT_PWM_CTRL_REG0,
+				 FORCE_STARTING_PWM_HIGHTIME,
+				 ~FORCE_STARTING_PWM_HIGHTIME);
+		}
+	}
+
+	WREG32_P(GFX_MACRO_BYPASS_CNTL, 0, ~SPLL_BYPASS_CNTL);
+}
+
+int rs780_dpm_enable(struct radeon_device *rdev)
+{
+	struct igp_power_info *pi = rs780_get_pi(rdev);
+
+	rs780_get_pm_mode_parameters(rdev);
+	rs780_disable_vbios_powersaving(rdev);
+
+	if (r600_dynamicpm_enabled(rdev))
+		return -EINVAL;
+	if (rs780_initialize_dpm_parameters(rdev))
+		return -EINVAL;
+	rs780_start_dpm(rdev);
+
+	rs780_preset_ranges_slow_clk_fbdiv_en(rdev);
+	rs780_preset_starting_fbdiv(rdev);
+	if (pi->voltage_control)
+		rs780_voltage_scaling_init(rdev);
+	rs780_clk_scaling_enable(rdev, true);
+	rs780_set_engine_clock_sc(rdev);
+	rs780_set_engine_clock_wfc(rdev);
+	rs780_program_at(rdev);
+	rs780_set_engine_clock_tdc(rdev);
+	rs780_set_engine_clock_ssc(rdev);
+
+	if (pi->gfx_clock_gating)
+		r600_gfx_clockgating_enable(rdev, true);
+
+	return 0;
+}
+
+void rs780_dpm_disable(struct radeon_device *rdev)
+{
+	struct igp_power_info *pi = rs780_get_pi(rdev);
+
+	r600_dynamicpm_enable(rdev, false);
+
+	rs780_clk_scaling_enable(rdev, false);
+	rs780_voltage_scaling_enable(rdev, false);
+
+	if (pi->gfx_clock_gating)
+		r600_gfx_clockgating_enable(rdev, false);
+}
+
+int rs780_dpm_set_power_state(struct radeon_device *rdev)
+{
+	struct igp_power_info *pi = rs780_get_pi(rdev);
+
+	rs780_get_pm_mode_parameters(rdev);
+
+	if (pi->voltage_control) {
+		rs780_force_voltage_to_high(rdev);
+		mdelay(5);
+	}
+
+	rs780_set_engine_clock_scaling(rdev);
+	rs780_set_engine_clock_spc(rdev);
+
+	rs780_activate_engine_clk_scaling(rdev);
+
+	if (pi->voltage_control)
+		rs780_enable_voltage_scaling(rdev);
+
+	return 0;
+}
+
+void rs780_dpm_setup_asic(struct radeon_device *rdev)
+{
+
+}
+
+void rs780_dpm_display_configuration_changed(struct radeon_device *rdev)
+{
+	rs780_get_pm_mode_parameters(rdev);
+	rs780_program_at(rdev);
+}
+
+union igp_info {
+	struct _ATOM_INTEGRATED_SYSTEM_INFO info;
+	struct _ATOM_INTEGRATED_SYSTEM_INFO_V2 info_2;
+};
+
+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 rs780_parse_pplib_non_clock_info(struct radeon_device *rdev,
+					     struct radeon_ps *rps,
+					     struct _ATOM_PPLIB_NONCLOCK_INFO *non_clock_info,
+					     u8 table_rev)
+{
+	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 (ATOM_PPLIB_NONCLOCKINFO_VER1 < table_rev) {
+		rps->vclk = le32_to_cpu(non_clock_info->ulVCLK);
+		rps->dclk = le32_to_cpu(non_clock_info->ulDCLK);
+	} else if (r600_is_uvd_state(rps->class, rps->class2)) {
+		rps->vclk = RS780_DEFAULT_VCLK_FREQ;
+		rps->dclk = RS780_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 rs780_parse_pplib_clock_info(struct radeon_device *rdev,
+					 struct radeon_ps *rps,
+					 union pplib_clock_info *clock_info)
+{
+	struct igp_ps *ps = rs780_get_ps(rps);
+	u32 sclk;
+
+	sclk = le16_to_cpu(clock_info->rs780.usLowEngineClockLow);
+	sclk |= clock_info->rs780.ucLowEngineClockHigh << 16;
+	ps->sclk_low = sclk;
+	sclk = le16_to_cpu(clock_info->rs780.usHighEngineClockLow);
+	sclk |= clock_info->rs780.ucHighEngineClockHigh << 16;
+	ps->sclk_high = sclk;
+	switch (le16_to_cpu(clock_info->rs780.usVDDC)) {
+	case ATOM_PPLIB_RS780_VOLTAGE_NONE:
+	default:
+		ps->min_voltage = RS780_VDDC_LEVEL_UNKNOWN;
+		ps->max_voltage = RS780_VDDC_LEVEL_UNKNOWN;
+		break;
+	case ATOM_PPLIB_RS780_VOLTAGE_LOW:
+		ps->min_voltage = RS780_VDDC_LEVEL_LOW;
+		ps->max_voltage = RS780_VDDC_LEVEL_LOW;
+		break;
+	case ATOM_PPLIB_RS780_VOLTAGE_HIGH:
+		ps->min_voltage = RS780_VDDC_LEVEL_HIGH;
+		ps->max_voltage = RS780_VDDC_LEVEL_HIGH;
+		break;
+	case ATOM_PPLIB_RS780_VOLTAGE_VARIABLE:
+		ps->min_voltage = RS780_VDDC_LEVEL_LOW;
+		ps->max_voltage = RS780_VDDC_LEVEL_HIGH;
+		break;
+	}
+	ps->flags = le32_to_cpu(clock_info->rs780.ulFlags);
+
+	if (rps->class & ATOM_PPLIB_CLASSIFICATION_BOOT) {
+		ps->sclk_low = rdev->clock.default_sclk;
+		ps->sclk_high = rdev->clock.default_sclk;
+		ps->min_voltage = RS780_VDDC_LEVEL_HIGH;
+		ps->max_voltage = RS780_VDDC_LEVEL_HIGH;
+	}
+}
+
+static int rs780_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;
+	union pplib_clock_info *clock_info;
+	union power_info *power_info;
+	int index = GetIndexIntoMasterTable(DATA, PowerPlayInfo);
+        u16 data_offset;
+	u8 frev, crev;
+	struct igp_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(sizeof(struct radeon_ps) *
+				  power_info->pplib.ucNumStates, GFP_KERNEL);
+	if (!rdev->pm.dpm.ps)
+		return -ENOMEM;
+	rdev->pm.dpm.platform_caps = le32_to_cpu(power_info->pplib.ulPlatformCaps);
+	rdev->pm.dpm.backbias_response_time = le16_to_cpu(power_info->pplib.usBackbiasTime);
+	rdev->pm.dpm.voltage_response_time = le16_to_cpu(power_info->pplib.usVoltageTime);
+
+	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) {
+			clock_info = (union pplib_clock_info *)
+				(mode_info->atom_context->bios + data_offset +
+				 le16_to_cpu(power_info->pplib.usClockInfoArrayOffset) +
+				 (power_state->v1.ucClockStateIndices[0] *
+				  power_info->pplib.ucClockInfoSize));
+			ps = kzalloc(sizeof(struct igp_ps), GFP_KERNEL);
+			if (ps == NULL) {
+				kfree(rdev->pm.dpm.ps);
+				return -ENOMEM;
+			}
+			rdev->pm.dpm.ps[i].ps_priv = ps;
+			rs780_parse_pplib_non_clock_info(rdev, &rdev->pm.dpm.ps[i],
+							 non_clock_info,
+							 power_info->pplib.ucNonClockSize);
+			rs780_parse_pplib_clock_info(rdev,
+						     &rdev->pm.dpm.ps[i],
+						     clock_info);
+		}
+	}
+	rdev->pm.dpm.num_ps = power_info->pplib.ucNumStates;
+	return 0;
+}
+
+int rs780_dpm_init(struct radeon_device *rdev)
+{
+	struct igp_power_info *pi;
+	int index = GetIndexIntoMasterTable(DATA, IntegratedSystemInfo);
+	union igp_info *info;
+	u16 data_offset;
+	u8 frev, crev;
+	int ret;
+
+	pi = kzalloc(sizeof(struct igp_power_info), GFP_KERNEL);
+	if (pi == NULL)
+		return -ENOMEM;
+	rdev->pm.dpm.priv = pi;
+
+	ret = rs780_parse_power_table(rdev);
+	if (ret)
+		return ret;
+
+	pi->voltage_control = false;
+	pi->gfx_clock_gating = true;
+
+	if (atom_parse_data_header(rdev->mode_info.atom_context, index, NULL,
+				   &frev, &crev, &data_offset)) {
+		info = (union igp_info *)(rdev->mode_info.atom_context->bios + data_offset);
+
+		/* Get various system informations from bios */
+		switch (crev) {
+		case 1:
+			pi->num_of_cycles_in_period =
+				info->info.ucNumberOfCyclesInPeriod;
+			pi->num_of_cycles_in_period |=
+				info->info.ucNumberOfCyclesInPeriodHi << 8;
+			pi->invert_pwm_required =
+				(pi->num_of_cycles_in_period & 0x8000) ? true : false;
+			pi->boot_voltage = info->info.ucStartingPWM_HighTime;
+			pi->max_voltage = info->info.ucMaxNBVoltage;
+			pi->max_voltage |= info->info.ucMaxNBVoltageHigh << 8;
+			pi->min_voltage = info->info.ucMinNBVoltage;
+			pi->min_voltage |= info->info.ucMinNBVoltageHigh << 8;
+			pi->inter_voltage_low =
+				le16_to_cpu(info->info.usInterNBVoltageLow);
+			pi->inter_voltage_high =
+				le16_to_cpu(info->info.usInterNBVoltageHigh);
+			pi->voltage_control = true;
+			pi->bootup_uma_clk = info->info.usK8MemoryClock * 100;
+			break;
+		case 2:
+			pi->num_of_cycles_in_period =
+				le16_to_cpu(info->info_2.usNumberOfCyclesInPeriod);
+			pi->invert_pwm_required =
+				(pi->num_of_cycles_in_period & 0x8000) ? true : false;
+			pi->boot_voltage =
+				le16_to_cpu(info->info_2.usBootUpNBVoltage);
+			pi->max_voltage =
+				le16_to_cpu(info->info_2.usMaxNBVoltage);
+			pi->min_voltage =
+				le16_to_cpu(info->info_2.usMinNBVoltage);
+			pi->system_config =
+				le32_to_cpu(info->info_2.ulSystemConfig);
+			pi->pwm_voltage_control =
+				(pi->system_config & 0x4) ? true : false;
+			pi->voltage_control = true;
+			pi->bootup_uma_clk = le32_to_cpu(info->info_2.ulBootUpUMAClock);
+			break;
+		default:
+			DRM_ERROR("No integrated system info for your GPU\n");
+			return -EINVAL;
+		}
+		if (pi->min_voltage > pi->max_voltage)
+			pi->voltage_control = false;
+		if (pi->pwm_voltage_control) {
+			if ((pi->num_of_cycles_in_period == 0) ||
+			    (pi->max_voltage == 0) ||
+			    (pi->min_voltage == 0))
+				pi->voltage_control = false;
+		} else {
+			if ((pi->num_of_cycles_in_period == 0) ||
+			    (pi->max_voltage == 0))
+				pi->voltage_control = false;
+		}
+
+		return 0;
+	}
+	radeon_dpm_fini(rdev);
+	return -EINVAL;
+}
+
+void rs780_dpm_print_power_state(struct radeon_device *rdev,
+				 struct radeon_ps *rps)
+{
+	struct igp_ps *ps = rs780_get_ps(rps);
+
+	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);
+	printk("\t\tpower level 0    sclk: %u vddc_index: %d\n",
+	       ps->sclk_low, ps->min_voltage);
+	printk("\t\tpower level 1    sclk: %u vddc_index: %d\n",
+	       ps->sclk_high, ps->max_voltage);
+	r600_dpm_print_ps_status(rdev, rps);
+}
+
+void rs780_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 rs780_dpm_get_sclk(struct radeon_device *rdev, bool low)
+{
+	struct igp_ps *requested_state = rs780_get_ps(rdev->pm.dpm.requested_ps);
+
+	if (low)
+		return requested_state->sclk_low;
+	else
+		return requested_state->sclk_high;
+}
+
+u32 rs780_dpm_get_mclk(struct radeon_device *rdev, bool low)
+{
+	struct igp_power_info *pi = rs780_get_pi(rdev);
+
+	return pi->bootup_uma_clk;
+}

drivers/gpu/drm/radeon/rs780_dpm.h

···
+/*
+ * 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.
+ *
+ */
+#ifndef __RS780_DPM_H__
+#define __RS780_DPM_H__
+
+enum rs780_vddc_level {
+	RS780_VDDC_LEVEL_UNKNOWN = 0,
+	RS780_VDDC_LEVEL_LOW = 1,
+	RS780_VDDC_LEVEL_HIGH = 2,
+};
+
+struct igp_power_info {
+	/* flags */
+	bool invert_pwm_required;
+	bool pwm_voltage_control;
+	bool voltage_control;
+	bool gfx_clock_gating;
+	/* stored values */
+	u32 system_config;
+	u32 bootup_uma_clk;
+	u16 max_voltage;
+	u16 min_voltage;
+	u16 boot_voltage;
+	u16 inter_voltage_low;
+	u16 inter_voltage_high;
+	u16 num_of_cycles_in_period;
+	/* variable */
+	int crtc_id;
+	int refresh_rate;
+};
+
+struct igp_ps {
+	enum rs780_vddc_level min_voltage;
+	enum rs780_vddc_level max_voltage;
+	u32 sclk_low;
+	u32 sclk_high;
+	u32 flags;
+};
+
+#define RS780_CGFTV_DFLT                 0x0303000f
+#define RS780_FBDIVTIMERVAL_DFLT         0x2710
+
+#define RS780_FVTHROTUTC0_DFLT   0x04010040
+#define RS780_FVTHROTUTC1_DFLT   0x04010040
+#define RS780_FVTHROTUTC2_DFLT   0x04010040
+#define RS780_FVTHROTUTC3_DFLT   0x04010040
+#define RS780_FVTHROTUTC4_DFLT   0x04010040
+
+#define RS780_FVTHROTDTC0_DFLT 0x04010040
+#define RS780_FVTHROTDTC1_DFLT 0x04010040
+#define RS780_FVTHROTDTC2_DFLT 0x04010040
+#define RS780_FVTHROTDTC3_DFLT 0x04010040
+#define RS780_FVTHROTDTC4_DFLT 0x04010040
+
+#define RS780_FVTHROTFBUSREG0_DFLT       0x00001001
+#define RS780_FVTHROTFBUSREG1_DFLT       0x00002002
+#define RS780_FVTHROTFBDSREG0_DFLT       0x00004001
+#define RS780_FVTHROTFBDSREG1_DFLT       0x00020010
+
+#define RS780_FVTHROTPWMUSREG0_DFLT      0x00002001
+#define RS780_FVTHROTPWMUSREG1_DFLT      0x00004003
+#define RS780_FVTHROTPWMDSREG0_DFLT      0x00002001
+#define RS780_FVTHROTPWMDSREG1_DFLT      0x00004003
+
+#define RS780_FVTHROTPWMFBDIVRANGEREG0_DFLT  0x37
+#define RS780_FVTHROTPWMFBDIVRANGEREG1_DFLT  0x4b
+#define RS780_FVTHROTPWMFBDIVRANGEREG2_DFLT  0x8b
+
+#define RS780D_FVTHROTPWMFBDIVRANGEREG0_DFLT  0x8b
+#define RS780D_FVTHROTPWMFBDIVRANGEREG1_DFLT  0x8c
+#define RS780D_FVTHROTPWMFBDIVRANGEREG2_DFLT  0xb5
+
+#define RS880D_FVTHROTPWMFBDIVRANGEREG0_DFLT  0x8d
+#define RS880D_FVTHROTPWMFBDIVRANGEREG1_DFLT  0x8e
+#define RS880D_FVTHROTPWMFBDIVRANGEREG2_DFLT  0xBa
+
+#define RS780_FVTHROTPWMRANGE0_GPIO_DFLT  0x1a
+#define RS780_FVTHROTPWMRANGE1_GPIO_DFLT  0x1a
+#define RS780_FVTHROTPWMRANGE2_GPIO_DFLT  0x0
+#define RS780_FVTHROTPWMRANGE3_GPIO_DFLT  0x0
+
+#define RS780_SLOWCLKFEEDBACKDIV_DFLT 110
+
+#define RS780_CGCLKGATING_DFLT           0x0000E204
+
+#define RS780_DEFAULT_VCLK_FREQ  53300 /* 10 khz */
+#define RS780_DEFAULT_DCLK_FREQ  40000 /* 10 khz */
+
+#endif

drivers/gpu/drm/radeon/rs780d.h

···
+/*
+ * 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.
+ *
+ */
+#ifndef __RS780D_H__
+#define __RS780D_H__
+
+#define CG_SPLL_FUNC_CNTL                                 0x600
+#       define SPLL_RESET                                (1 << 0)
+#       define SPLL_SLEEP                                (1 << 1)
+#       define SPLL_REF_DIV(x)                           ((x) << 2)
+#       define SPLL_REF_DIV_MASK                         (7 << 2)
+#       define SPLL_FB_DIV(x)                            ((x) << 5)
+#       define SPLL_FB_DIV_MASK                          (0xff << 2)
+#       define SPLL_FB_DIV_SHIFT                         2
+#       define SPLL_PULSEEN                              (1 << 13)
+#       define SPLL_PULSENUM(x)                          ((x) << 14)
+#       define SPLL_PULSENUM_MASK                        (3 << 14)
+#       define SPLL_SW_HILEN(x)                          ((x) << 16)
+#       define SPLL_SW_HILEN_MASK                        (0xf << 16)
+#       define SPLL_SW_LOLEN(x)                          ((x) << 20)
+#       define SPLL_SW_LOLEN_MASK                        (0xf << 20)
+#       define SPLL_DIVEN                                (1 << 24)
+#       define SPLL_BYPASS_EN                            (1 << 25)
+#       define SPLL_CHG_STATUS                           (1 << 29)
+#       define SPLL_CTLREQ                               (1 << 30)
+#       define SPLL_CTLACK                               (1 << 31)
+
+/* RS780/RS880 PM */
+#define	FVTHROT_CNTRL_REG				0x3000
+#define		DONT_WAIT_FOR_FBDIV_WRAP		(1 << 0)
+#define		MINIMUM_CIP(x)				((x) << 1)
+#define		MINIMUM_CIP_SHIFT			1
+#define		MINIMUM_CIP_MASK			0x1fffffe
+#define		REFRESH_RATE_DIVISOR(x)			((x) << 25)
+#define		REFRESH_RATE_DIVISOR_SHIFT		25
+#define		REFRESH_RATE_DIVISOR_MASK		(0x3 << 25)
+#define		ENABLE_FV_THROT				(1 << 27)
+#define		ENABLE_FV_UPDATE			(1 << 28)
+#define		TREND_SEL_MODE				(1 << 29)
+#define		FORCE_TREND_SEL				(1 << 30)
+#define		ENABLE_FV_THROT_IO			(1 << 31)
+#define	FVTHROT_TARGET_REG				0x3004
+#define		TARGET_IDLE_COUNT(x)			((x) << 0)
+#define		TARGET_IDLE_COUNT_MASK			0xffffff
+#define		TARGET_IDLE_COUNT_SHIFT			0
+#define	FVTHROT_CB1					0x3008
+#define	FVTHROT_CB2					0x300c
+#define	FVTHROT_CB3					0x3010
+#define	FVTHROT_CB4					0x3014
+#define	FVTHROT_UTC0					0x3018
+#define	FVTHROT_UTC1					0x301c
+#define	FVTHROT_UTC2					0x3020
+#define	FVTHROT_UTC3					0x3024
+#define	FVTHROT_UTC4					0x3028
+#define	FVTHROT_DTC0					0x302c
+#define	FVTHROT_DTC1					0x3030
+#define	FVTHROT_DTC2					0x3034
+#define	FVTHROT_DTC3					0x3038
+#define	FVTHROT_DTC4					0x303c
+#define	FVTHROT_FBDIV_REG0				0x3040
+#define		MIN_FEEDBACK_DIV(x)			((x) << 0)
+#define		MIN_FEEDBACK_DIV_MASK			0xfff
+#define		MIN_FEEDBACK_DIV_SHIFT			0
+#define		MAX_FEEDBACK_DIV(x)			((x) << 12)
+#define		MAX_FEEDBACK_DIV_MASK			(0xfff << 12)
+#define		MAX_FEEDBACK_DIV_SHIFT			12
+#define	FVTHROT_FBDIV_REG1				0x3044
+#define		MAX_FEEDBACK_STEP(x)			((x) << 0)
+#define		MAX_FEEDBACK_STEP_MASK			0xfff
+#define		MAX_FEEDBACK_STEP_SHIFT			0
+#define		STARTING_FEEDBACK_DIV(x)		((x) << 12)
+#define		STARTING_FEEDBACK_DIV_MASK		(0xfff << 12)
+#define		STARTING_FEEDBACK_DIV_SHIFT		12
+#define		FORCE_FEEDBACK_DIV			(1 << 24)
+#define	FVTHROT_FBDIV_REG2				0x3048
+#define		FORCED_FEEDBACK_DIV(x)			((x) << 0)
+#define		FORCED_FEEDBACK_DIV_MASK		0xfff
+#define		FORCED_FEEDBACK_DIV_SHIFT		0
+#define		FB_DIV_TIMER_VAL(x)			((x) << 12)
+#define		FB_DIV_TIMER_VAL_MASK			(0xffff << 12)
+#define		FB_DIV_TIMER_VAL_SHIFT			12
+#define	FVTHROT_FB_US_REG0				0x304c
+#define	FVTHROT_FB_US_REG1				0x3050
+#define	FVTHROT_FB_DS_REG0				0x3054
+#define	FVTHROT_FB_DS_REG1				0x3058
+#define	FVTHROT_PWM_CTRL_REG0				0x305c
+#define		STARTING_PWM_HIGHTIME(x)		((x) << 0)
+#define		STARTING_PWM_HIGHTIME_MASK		0xfff
+#define		STARTING_PWM_HIGHTIME_SHIFT		0
+#define		NUMBER_OF_CYCLES_IN_PERIOD(x)		((x) << 12)
+#define		NUMBER_OF_CYCLES_IN_PERIOD_MASK		(0xfff << 12)
+#define		NUMBER_OF_CYCLES_IN_PERIOD_SHIFT	12
+#define		FORCE_STARTING_PWM_HIGHTIME		(1 << 24)
+#define		INVERT_PWM_WAVEFORM			(1 << 25)
+#define	FVTHROT_PWM_CTRL_REG1				0x3060
+#define		MIN_PWM_HIGHTIME(x)			((x) << 0)
+#define		MIN_PWM_HIGHTIME_MASK			0xfff
+#define		MIN_PWM_HIGHTIME_SHIFT			0
+#define		MAX_PWM_HIGHTIME(x)			((x) << 12)
+#define		MAX_PWM_HIGHTIME_MASK			(0xfff << 12)
+#define		MAX_PWM_HIGHTIME_SHIFT			12
+#define	FVTHROT_PWM_US_REG0				0x3064
+#define	FVTHROT_PWM_US_REG1				0x3068
+#define	FVTHROT_PWM_DS_REG0				0x306c
+#define	FVTHROT_PWM_DS_REG1				0x3070
+#define	FVTHROT_STATUS_REG0				0x3074
+#define		CURRENT_FEEDBACK_DIV_MASK		0xfff
+#define		CURRENT_FEEDBACK_DIV_SHIFT		0
+#define	FVTHROT_STATUS_REG1				0x3078
+#define	FVTHROT_STATUS_REG2				0x307c
+#define	CG_INTGFX_MISC					0x3080
+#define		FVTHROT_VBLANK_SEL			(1 << 9)
+#define	FVTHROT_PWM_FEEDBACK_DIV_REG1			0x308c
+#define		RANGE0_PWM_FEEDBACK_DIV(x)		((x) << 0)
+#define		RANGE0_PWM_FEEDBACK_DIV_MASK		0xfff
+#define		RANGE0_PWM_FEEDBACK_DIV_SHIFT		0
+#define		RANGE_PWM_FEEDBACK_DIV_EN		(1 << 12)
+#define	FVTHROT_PWM_FEEDBACK_DIV_REG2			0x3090
+#define		RANGE1_PWM_FEEDBACK_DIV(x)		((x) << 0)
+#define		RANGE1_PWM_FEEDBACK_DIV_MASK		0xfff
+#define		RANGE1_PWM_FEEDBACK_DIV_SHIFT		0
+#define		RANGE2_PWM_FEEDBACK_DIV(x)		((x) << 12)
+#define		RANGE2_PWM_FEEDBACK_DIV_MASK		(0xfff << 12)
+#define		RANGE2_PWM_FEEDBACK_DIV_SHIFT		12
+#define	FVTHROT_PWM_FEEDBACK_DIV_REG3			0x3094
+#define		RANGE0_PWM(x)				((x) << 0)
+#define		RANGE0_PWM_MASK				0xfff
+#define		RANGE0_PWM_SHIFT			0
+#define		RANGE1_PWM(x)				((x) << 12)
+#define		RANGE1_PWM_MASK				(0xfff << 12)
+#define		RANGE1_PWM_SHIFT			12
+#define	FVTHROT_PWM_FEEDBACK_DIV_REG4			0x3098
+#define		RANGE2_PWM(x)				((x) << 0)
+#define		RANGE2_PWM_MASK				0xfff
+#define		RANGE2_PWM_SHIFT			0
+#define		RANGE3_PWM(x)				((x) << 12)
+#define		RANGE3_PWM_MASK				(0xfff << 12)
+#define		RANGE3_PWM_SHIFT			12
+#define	FVTHROT_SLOW_CLK_FEEDBACK_DIV_REG1		0x30ac
+#define		RANGE0_SLOW_CLK_FEEDBACK_DIV(x)		((x) << 0)
+#define		RANGE0_SLOW_CLK_FEEDBACK_DIV_MASK	0xfff
+#define		RANGE0_SLOW_CLK_FEEDBACK_DIV_SHIFT	0
+#define		RANGE_SLOW_CLK_FEEDBACK_DIV_EN		(1 << 12)
+
+#define	GFX_MACRO_BYPASS_CNTL				0x30c0
+#define		SPLL_BYPASS_CNTL			(1 << 0)
+#define		UPLL_BYPASS_CNTL			(1 << 1)
+
+#endif