drm/radeon/kms/pm: add support for no display power states

The lowest power states often cause display problems, so only enable
them when all displays are off.

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

drivers/gpu/drm/radeon/atombios_crtc.c

@@ -245,13 +245,15 @@ void atombios_crtc_dpms(struct drm_crtc *crtc, int mode)
 
 	switch (mode) {
 	case DRM_MODE_DPMS_ON:
+		radeon_crtc->enabled = true;
+		/* adjust pm to dpms changes BEFORE enabling crtcs */
+		radeon_pm_compute_clocks(rdev);
 		atombios_enable_crtc(crtc, ATOM_ENABLE);
 		if (ASIC_IS_DCE3(rdev))
 			atombios_enable_crtc_memreq(crtc, ATOM_ENABLE);
 		atombios_blank_crtc(crtc, ATOM_DISABLE);
 		drm_vblank_post_modeset(dev, radeon_crtc->crtc_id);
 		radeon_crtc_load_lut(crtc);
-		radeon_crtc->enabled = true;
 		break;
 	case DRM_MODE_DPMS_STANDBY:
 	case DRM_MODE_DPMS_SUSPEND:
@@ -262,11 +264,10 @@ void atombios_crtc_dpms(struct drm_crtc *crtc, int mode)
 			atombios_enable_crtc_memreq(crtc, ATOM_DISABLE);
 		atombios_enable_crtc(crtc, ATOM_DISABLE);
 		radeon_crtc->enabled = false;
+		/* adjust pm to dpms changes AFTER disabling crtcs */
+		radeon_pm_compute_clocks(rdev);
 		break;
 	}
-
-	/* adjust pm to dpms change */
-	radeon_pm_compute_clocks(rdev);
 }
 
 static void

drivers/gpu/drm/radeon/r100.c

@@ -87,7 +87,7 @@ void r100_get_power_state(struct radeon_device *rdev,
 		} else {
 			if (rdev->pm.active_crtc_count > 1) {
 				for (i = 0; i < rdev->pm.num_power_states; i++) {
-					if (rdev->pm.power_state[i].flags & RADEON_PM_SINGLE_DISPLAY_ONLY)
+					if (rdev->pm.power_state[i].flags & RADEON_PM_STATE_SINGLE_DISPLAY_ONLY)
 						continue;
 					else if (i >= rdev->pm.current_power_state_index) {
 						rdev->pm.requested_power_state_index = rdev->pm.current_power_state_index;
@@ -101,6 +101,12 @@ void r100_get_power_state(struct radeon_device *rdev,
 				rdev->pm.requested_power_state_index =
 					rdev->pm.current_power_state_index - 1;
 		}
+		/* don't use the power state if crtcs are active and no display flag is set */
+		if ((rdev->pm.active_crtc_count > 0) &&
+		    (rdev->pm.power_state[rdev->pm.requested_power_state_index].clock_info[0].flags &
+		     RADEON_PM_MODE_NO_DISPLAY)) {
+			rdev->pm.requested_power_state_index++;
+		}
 		break;
 	case PM_ACTION_UPCLOCK:
 		if (rdev->pm.current_power_state_index == (rdev->pm.num_power_states - 1)) {
@@ -109,7 +115,7 @@ void r100_get_power_state(struct radeon_device *rdev,
 		} else {
 			if (rdev->pm.active_crtc_count > 1) {
 				for (i = (rdev->pm.num_power_states - 1); i >= 0; i--) {
-					if (rdev->pm.power_state[i].flags & RADEON_PM_SINGLE_DISPLAY_ONLY)
+					if (rdev->pm.power_state[i].flags & RADEON_PM_STATE_SINGLE_DISPLAY_ONLY)
 						continue;
 					else if (i <= rdev->pm.current_power_state_index) {
 						rdev->pm.requested_power_state_index = rdev->pm.current_power_state_index;
@@ -215,7 +221,7 @@ void r100_set_power_state(struct radeon_device *rdev, bool static_switch)
 		rdev->pm.current_power_state_index = rdev->pm.requested_power_state_index;
 		rdev->pm.current_clock_mode_index = rdev->pm.requested_clock_mode_index;
 	} else
-		DRM_INFO("GUI not idle!!!\n");
+		DRM_INFO("pm: GUI not idle!!!\n");
 }
 
 void r100_pm_misc(struct radeon_device *rdev)

drivers/gpu/drm/radeon/r600.c

@@ -120,7 +120,7 @@ void r600_get_power_state(struct radeon_device *rdev,
 			} else {
 				if (rdev->pm.active_crtc_count > 1) {
 					for (i = 0; i < rdev->pm.num_power_states; i++) {
-						if (rdev->pm.power_state[i].flags & RADEON_PM_SINGLE_DISPLAY_ONLY)
+						if (rdev->pm.power_state[i].flags & RADEON_PM_STATE_SINGLE_DISPLAY_ONLY)
 							continue;
 						else if (i >= rdev->pm.current_power_state_index) {
 							rdev->pm.requested_power_state_index =
@@ -136,6 +136,13 @@ void r600_get_power_state(struct radeon_device *rdev,
 						rdev->pm.current_power_state_index - 1;
 			}
 			rdev->pm.requested_clock_mode_index = 0;
+			/* don't use the power state if crtcs are active and no display flag is set */
+			if ((rdev->pm.active_crtc_count > 0) &&
+			    (rdev->pm.power_state[rdev->pm.requested_power_state_index].
+			     clock_info[rdev->pm.requested_clock_mode_index].flags &
+			     RADEON_PM_MODE_NO_DISPLAY)) {
+				rdev->pm.requested_power_state_index++;
+			}
 			break;
 		case PM_ACTION_UPCLOCK:
 			if (rdev->pm.current_power_state_index == (rdev->pm.num_power_states - 1)) {
@@ -144,7 +151,7 @@ void r600_get_power_state(struct radeon_device *rdev,
 			} else {
 				if (rdev->pm.active_crtc_count > 1) {
 					for (i = (rdev->pm.num_power_states - 1); i >= 0; i--) {
-						if (rdev->pm.power_state[i].flags & RADEON_PM_SINGLE_DISPLAY_ONLY)
+						if (rdev->pm.power_state[i].flags & RADEON_PM_STATE_SINGLE_DISPLAY_ONLY)
 							continue;
 						else if (i <= rdev->pm.current_power_state_index) {
 							rdev->pm.requested_power_state_index =
@@ -179,7 +186,7 @@ void r600_get_power_state(struct radeon_device *rdev,
 			rdev->pm.requested_power_state_index = -1;
 			/* start at 1 as we don't want the default mode */
 			for (i = 1; i < rdev->pm.num_power_states; i++) {
-				if (rdev->pm.power_state[i].flags & RADEON_PM_SINGLE_DISPLAY_ONLY)
+				if (rdev->pm.power_state[i].flags & RADEON_PM_STATE_SINGLE_DISPLAY_ONLY)
 					continue;
 				else if ((rdev->pm.power_state[i].type == POWER_STATE_TYPE_PERFORMANCE) ||
 					 (rdev->pm.power_state[i].type == POWER_STATE_TYPE_BATTERY)) {
@@ -210,6 +217,13 @@ void r600_get_power_state(struct radeon_device *rdev,
 				rdev->pm.requested_clock_mode_index = 0;
 				rdev->pm.can_downclock = false;
 			}
+			/* don't use the power state if crtcs are active and no display flag is set */
+			if ((rdev->pm.active_crtc_count > 0) &&
+			    (rdev->pm.power_state[rdev->pm.requested_power_state_index].
+			     clock_info[rdev->pm.requested_clock_mode_index].flags &
+			     RADEON_PM_MODE_NO_DISPLAY)) {
+				rdev->pm.requested_clock_mode_index++;
+			}
 			break;
 		case PM_ACTION_UPCLOCK:
 			if (rdev->pm.requested_power_state_index == rdev->pm.current_power_state_index) {

drivers/gpu/drm/radeon/radeon.h

@@ -658,6 +658,9 @@ struct radeon_voltage {
 	u32 voltage;
 };
 
+/* clock mode flags */
+#define RADEON_PM_MODE_NO_DISPLAY          (1 << 0)
+
 struct radeon_pm_clock_info {
 	/* memory clock */
 	u32 mclk;
@@ -665,12 +668,12 @@ struct radeon_pm_clock_info {
 	u32 sclk;
 	/* voltage info */
 	struct radeon_voltage voltage;
-	/* standardized clock flags - not sure we'll need these */
+	/* standardized clock flags */
 	u32 flags;
 };
 
 /* state flags */
-#define RADEON_PM_SINGLE_DISPLAY_ONLY (1 << 0)
+#define RADEON_PM_STATE_SINGLE_DISPLAY_ONLY (1 << 0)
 
 struct radeon_power_state {
 	enum radeon_pm_state_type type;

drivers/gpu/drm/radeon/radeon_atombios.c

@@ -1549,7 +1549,7 @@ void radeon_atombios_get_power_modes(struct radeon_device *rdev)
 						rdev->pm.power_state[state_index].clock_info[0].voltage.vddc_id =
 							power_info->info.asPowerPlayInfo[i].ucVoltageDropIndex;
 					}
-					rdev->pm.power_state[state_index].flags = RADEON_PM_SINGLE_DISPLAY_ONLY;
+					rdev->pm.power_state[state_index].flags = RADEON_PM_STATE_SINGLE_DISPLAY_ONLY;
 					rdev->pm.power_state[state_index].misc = misc;
 					/* order matters! */
 					if (misc & ATOM_PM_MISCINFO_POWER_SAVING_MODE)
@@ -1568,7 +1568,7 @@ void radeon_atombios_get_power_modes(struct radeon_device *rdev)
 						rdev->pm.power_state[state_index].type =
 							POWER_STATE_TYPE_PERFORMANCE;
 						rdev->pm.power_state[state_index].flags &=
-							~RADEON_PM_SINGLE_DISPLAY_ONLY;
+							~RADEON_PM_STATE_SINGLE_DISPLAY_ONLY;
 					}
 					if (misc & ATOM_PM_MISCINFO_DRIVER_DEFAULT_MODE) {
 						rdev->pm.power_state[state_index].type =
@@ -1577,7 +1577,10 @@ void radeon_atombios_get_power_modes(struct radeon_device *rdev)
 						rdev->pm.power_state[state_index].default_clock_mode =
 							&rdev->pm.power_state[state_index].clock_info[0];
 						rdev->pm.power_state[state_index].flags &=
-							~RADEON_PM_SINGLE_DISPLAY_ONLY;
+							~RADEON_PM_STATE_SINGLE_DISPLAY_ONLY;
+					} else if (state_index == 0) {
+						rdev->pm.power_state[state_index].clock_info[0].flags |=
+							RADEON_PM_MODE_NO_DISPLAY;
 					}
 					state_index++;
 					break;
@@ -1613,7 +1616,7 @@ void radeon_atombios_get_power_modes(struct radeon_device *rdev)
 						rdev->pm.power_state[state_index].clock_info[0].voltage.vddc_id =
 							power_info->info_2.asPowerPlayInfo[i].ucVoltageDropIndex;
 					}
-					rdev->pm.power_state[state_index].flags = RADEON_PM_SINGLE_DISPLAY_ONLY;
+					rdev->pm.power_state[state_index].flags = RADEON_PM_STATE_SINGLE_DISPLAY_ONLY;
 					rdev->pm.power_state[state_index].misc = misc;
 					rdev->pm.power_state[state_index].misc2 = misc2;
 					/* order matters! */
@@ -1633,14 +1636,14 @@ void radeon_atombios_get_power_modes(struct radeon_device *rdev)
 						rdev->pm.power_state[state_index].type =
 							POWER_STATE_TYPE_PERFORMANCE;
 						rdev->pm.power_state[state_index].flags &=
-							~RADEON_PM_SINGLE_DISPLAY_ONLY;
+							~RADEON_PM_STATE_SINGLE_DISPLAY_ONLY;
 					}
 					if (misc2 & ATOM_PM_MISCINFO2_SYSTEM_AC_LITE_MODE)
 						rdev->pm.power_state[state_index].type =
 							POWER_STATE_TYPE_BALANCED;
 					if (misc2 & ATOM_PM_MISCINFO2_MULTI_DISPLAY_SUPPORT)
 						rdev->pm.power_state[state_index].flags &=
-							~RADEON_PM_SINGLE_DISPLAY_ONLY;
+							~RADEON_PM_STATE_SINGLE_DISPLAY_ONLY;
 					if (misc & ATOM_PM_MISCINFO_DRIVER_DEFAULT_MODE) {
 						rdev->pm.power_state[state_index].type =
 							POWER_STATE_TYPE_DEFAULT;
@@ -1648,7 +1651,10 @@ void radeon_atombios_get_power_modes(struct radeon_device *rdev)
 						rdev->pm.power_state[state_index].default_clock_mode =
 							&rdev->pm.power_state[state_index].clock_info[0];
 						rdev->pm.power_state[state_index].flags &=
-							~RADEON_PM_SINGLE_DISPLAY_ONLY;
+							~RADEON_PM_STATE_SINGLE_DISPLAY_ONLY;
+					} else if (state_index == 0) {
+						rdev->pm.power_state[state_index].clock_info[0].flags |=
+							RADEON_PM_MODE_NO_DISPLAY;
 					}
 					state_index++;
 					break;
@@ -1690,7 +1696,7 @@ void radeon_atombios_get_power_modes(struct radeon_device *rdev)
 							power_info->info_3.asPowerPlayInfo[i].ucVDDCI_VoltageDropIndex;
 						}
 					}
-					rdev->pm.power_state[state_index].flags = RADEON_PM_SINGLE_DISPLAY_ONLY;
+					rdev->pm.power_state[state_index].flags = RADEON_PM_STATE_SINGLE_DISPLAY_ONLY;
 					rdev->pm.power_state[state_index].misc = misc;
 					rdev->pm.power_state[state_index].misc2 = misc2;
 					/* order matters! */
@@ -1710,7 +1716,7 @@ void radeon_atombios_get_power_modes(struct radeon_device *rdev)
 						rdev->pm.power_state[state_index].type =
 							POWER_STATE_TYPE_PERFORMANCE;
 						rdev->pm.power_state[state_index].flags &=
-							~RADEON_PM_SINGLE_DISPLAY_ONLY;
+							~RADEON_PM_STATE_SINGLE_DISPLAY_ONLY;
 					}
 					if (misc2 & ATOM_PM_MISCINFO2_SYSTEM_AC_LITE_MODE)
 						rdev->pm.power_state[state_index].type =
@@ -1721,6 +1727,9 @@ void radeon_atombios_get_power_modes(struct radeon_device *rdev)
 						rdev->pm.default_power_state_index = state_index;
 						rdev->pm.power_state[state_index].default_clock_mode =
 							&rdev->pm.power_state[state_index].clock_info[0];
+					} else if (state_index == 0) {
+						rdev->pm.power_state[state_index].clock_info[0].flags |=
+							RADEON_PM_MODE_NO_DISPLAY;
 					}
 					state_index++;
 					break;
@@ -1734,7 +1743,7 @@ void radeon_atombios_get_power_modes(struct radeon_device *rdev)
 				rdev->pm.power_state[state_index - 1].default_clock_mode =
 					&rdev->pm.power_state[state_index - 1].clock_info[0];
 				rdev->pm.power_state[state_index].flags &=
-					~RADEON_PM_SINGLE_DISPLAY_ONLY;
+					~RADEON_PM_STATE_SINGLE_DISPLAY_ONLY;
 				rdev->pm.power_state[state_index].misc = 0;
 				rdev->pm.power_state[state_index].misc2 = 0;
 			}
@@ -1881,7 +1890,7 @@ void radeon_atombios_get_power_modes(struct radeon_device *rdev)
 					rdev->pm.power_state[state_index].flags = 0;
 					if (misc & ATOM_PPLIB_SINGLE_DISPLAY_ONLY)
 						rdev->pm.power_state[state_index].flags |=
-							RADEON_PM_SINGLE_DISPLAY_ONLY;
+							RADEON_PM_STATE_SINGLE_DISPLAY_ONLY;
 					if (misc2 & ATOM_PPLIB_CLASSIFICATION_BOOT) {
 						rdev->pm.power_state[state_index].type =
 							POWER_STATE_TYPE_DEFAULT;
@@ -1892,6 +1901,12 @@ void radeon_atombios_get_power_modes(struct radeon_device *rdev)
 					state_index++;
 				}
 			}
+			/* if multiple clock modes, mark the lowest as no display */
+			for (i = 0; i < state_index; i++) {
+				if (rdev->pm.power_state[i].num_clock_modes > 1)
+					rdev->pm.power_state[i].clock_info[0].flags |=
+						RADEON_PM_MODE_NO_DISPLAY;
+			}
 			/* first mode is usually default */
 			if (rdev->pm.default_power_state_index == -1) {
 				rdev->pm.power_state[0].type =

drivers/gpu/drm/radeon/radeon_combios.c

@@ -2437,7 +2437,7 @@ void radeon_combios_get_power_modes(struct radeon_device *rdev)
 			if (rev > 6)
 				rdev->pm.power_state[state_index].pcie_lanes =
 					RBIOS8(offset + 0x5 + 0x10);
-			rdev->pm.power_state[state_index].flags = RADEON_PM_SINGLE_DISPLAY_ONLY;
+			rdev->pm.power_state[state_index].flags = RADEON_PM_STATE_SINGLE_DISPLAY_ONLY;
 			state_index++;
 		} else {
 			/* XXX figure out some good default low power mode for mobility cards w/out power tables */

drivers/gpu/drm/radeon/radeon_legacy_crtc.c

@@ -314,6 +314,9 @@ void radeon_crtc_dpms(struct drm_crtc *crtc, int mode)
 
 	switch (mode) {
 	case DRM_MODE_DPMS_ON:
+		radeon_crtc->enabled = true;
+		/* adjust pm to dpms changes BEFORE enabling crtcs */
+		radeon_pm_compute_clocks(rdev);
 		if (radeon_crtc->crtc_id)
 			WREG32_P(RADEON_CRTC2_GEN_CNTL, RADEON_CRTC2_EN, ~(RADEON_CRTC2_EN | mask));
 		else {
@@ -323,7 +326,6 @@ void radeon_crtc_dpms(struct drm_crtc *crtc, int mode)
 		}
 		drm_vblank_post_modeset(dev, radeon_crtc->crtc_id);
 		radeon_crtc_load_lut(crtc);
-		radeon_crtc->enabled = true;
 		break;
 	case DRM_MODE_DPMS_STANDBY:
 	case DRM_MODE_DPMS_SUSPEND:
@@ -337,11 +339,10 @@ void radeon_crtc_dpms(struct drm_crtc *crtc, int mode)
 			WREG32_P(RADEON_CRTC_EXT_CNTL, mask, ~mask);
 		}
 		radeon_crtc->enabled = false;
+		/* adjust pm to dpms changes AFTER disabling crtcs */
+		radeon_pm_compute_clocks(rdev);
 		break;
 	}
-
-	/* adjust pm to dpms change */
-	radeon_pm_compute_clocks(rdev);
 }
 
 int radeon_crtc_set_base(struct drm_crtc *crtc, int x, int y,

drivers/gpu/drm/radeon/radeon_pm.c

@@ -58,7 +58,7 @@ static void radeon_pm_set_clocks(struct radeon_device *rdev, int static_switch)
 {
 	int i;
 
-	if (!static_switch)
+	if (rdev->pm.state != PM_STATE_DISABLED)
 		radeon_get_power_state(rdev, rdev->pm.planned_action);
 
 	mutex_lock(&rdev->ddev->struct_mutex);
@@ -147,8 +147,11 @@ static ssize_t radeon_set_power_state_static(struct device *dev,
 	mutex_lock(&rdev->pm.mutex);
 	if ((ps >= 0) && (ps < rdev->pm.num_power_states) &&
 	    (cm >= 0) && (cm < rdev->pm.power_state[ps].num_clock_modes)) {
-		if ((rdev->pm.active_crtc_count > 1) &&
-		    (rdev->pm.power_state[ps].flags & RADEON_PM_SINGLE_DISPLAY_ONLY)) {
+		if ((rdev->pm.active_crtc_count > 0) &&
+		    (rdev->pm.power_state[ps].clock_info[cm].flags & RADEON_PM_MODE_NO_DISPLAY)) {
+			DRM_ERROR("Invalid power state for display: %d.%d\n", ps, cm);
+		} else if ((rdev->pm.active_crtc_count > 1) &&
+			   (rdev->pm.power_state[ps].flags & RADEON_PM_STATE_SINGLE_DISPLAY_ONLY)) {
 			DRM_ERROR("Invalid power state for multi-head: %d.%d\n", ps, cm);
 		} else {
 			/* disable dynpm */
@@ -248,7 +251,7 @@ static void radeon_print_power_mode_info(struct radeon_device *rdev)
 			 is_default ? "(default)" : "");
 		if ((rdev->flags & RADEON_IS_PCIE) && !(rdev->flags & RADEON_IS_IGP))
 			DRM_INFO("\t%d PCIE Lanes\n", rdev->pm.power_state[i].pcie_lanes);
-		if (rdev->pm.power_state[i].flags & RADEON_PM_SINGLE_DISPLAY_ONLY)
+		if (rdev->pm.power_state[i].flags & RADEON_PM_STATE_SINGLE_DISPLAY_ONLY)
 			DRM_INFO("\tSingle display only\n");
 		DRM_INFO("\t%d Clock Mode(s)\n", rdev->pm.power_state[i].num_clock_modes);
 		for (j = 0; j < rdev->pm.power_state[i].num_clock_modes; j++) {
@@ -261,6 +264,8 @@ static void radeon_print_power_mode_info(struct radeon_device *rdev)
 					 j,
 					 rdev->pm.power_state[i].clock_info[j].sclk * 10,
 					 rdev->pm.power_state[i].clock_info[j].mclk * 10);
+			if (rdev->pm.power_state[i].clock_info[j].flags & RADEON_PM_MODE_NO_DISPLAY)
+				DRM_INFO("\t\tNo display only\n");
 		}
 	}
 }
@@ -318,7 +323,7 @@ void radeon_pm_fini(struct radeon_device *rdev)
 		/* reset default clocks */
 		rdev->pm.state = PM_STATE_DISABLED;
 		rdev->pm.planned_action = PM_ACTION_DEFAULT;
-		radeon_pm_set_clocks(rdev, false);
+		radeon_pm_set_clocks(rdev, true);
 	} else if ((rdev->pm.current_power_state_index !=
 		    rdev->pm.default_power_state_index) ||
 		   (rdev->pm.current_clock_mode_index != 0)) {
@@ -342,9 +347,6 @@ void radeon_pm_compute_clocks(struct radeon_device *rdev)
 	struct drm_crtc *crtc;
 	struct radeon_crtc *radeon_crtc;
 
-	if (rdev->pm.state == PM_STATE_DISABLED)
-		return;
-
 	mutex_lock(&rdev->pm.mutex);
 
 	rdev->pm.active_crtcs = 0;
@@ -358,13 +360,22 @@ void radeon_pm_compute_clocks(struct radeon_device *rdev)
 		}
 	}
 
+	if (rdev->pm.state == PM_STATE_DISABLED) {
+		mutex_unlock(&rdev->pm.mutex);
+		return;
+	}
+
+	/* Note, radeon_pm_set_clocks is called with static_switch set
+	 * to true since we always want to statically set the clocks,
+	 * not wait for vbl.
+	 */
 	if (rdev->pm.active_crtc_count > 1) {
 		if (rdev->pm.state == PM_STATE_ACTIVE) {
 			cancel_delayed_work(&rdev->pm.idle_work);
 
 			rdev->pm.state = PM_STATE_PAUSED;
-			rdev->pm.planned_action = PM_ACTION_UPCLOCK;
-			radeon_pm_set_clocks(rdev, false);
+			rdev->pm.planned_action = PM_ACTION_DEFAULT;
+			radeon_pm_set_clocks(rdev, true);
 
 			DRM_DEBUG("radeon: dynamic power management deactivated\n");
 		}
@@ -374,7 +385,7 @@ void radeon_pm_compute_clocks(struct radeon_device *rdev)
 		if (rdev->pm.state == PM_STATE_MINIMUM) {
 			rdev->pm.state = PM_STATE_ACTIVE;
 			rdev->pm.planned_action = PM_ACTION_UPCLOCK;
-			radeon_pm_set_clocks(rdev, false);
+			radeon_pm_set_clocks(rdev, true);
 
 			queue_delayed_work(rdev->wq, &rdev->pm.idle_work,
 				msecs_to_jiffies(RADEON_IDLE_LOOP_MS));
@@ -390,7 +401,7 @@ void radeon_pm_compute_clocks(struct radeon_device *rdev)
 
 			rdev->pm.state = PM_STATE_MINIMUM;
 			rdev->pm.planned_action = PM_ACTION_MINIMUM;
-			radeon_pm_set_clocks(rdev, false);
+			radeon_pm_set_clocks(rdev, true);
 		}
 	}
 
@@ -526,6 +537,9 @@ static void radeon_pm_idle_work_handler(struct work_struct *work)
 			}
 		}
 
+		/* Note, radeon_pm_set_clocks is called with static_switch set
+		 * to false since we want to wait for vbl to avoid flicker.
+		 */
 		if (rdev->pm.planned_action != PM_ACTION_NONE &&
 		    jiffies > rdev->pm.action_timeout) {
 			radeon_pm_set_clocks(rdev, false);