drm/amd/pm: revise the performance level setting APIs

Avoid cross callings which make lock protection enforcement
on amdgpu_dpm_force_performance_level() impossible.
Signed-off-by: Evan Quan <evan.quan@amd.com>
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/include/amd_shared.h

@@ -268,7 +268,6 @@ enum amd_dpm_forced_level;
  * @set_clockgating_state: enable/disable cg for the IP block
  * @set_powergating_state: enable/disable pg for the IP block
  * @get_clockgating_state: get current clockgating status
- * @enable_umd_pstate: enable UMD powerstate
  *
  * These hooks provide an interface for controlling the operational state
  * of IP blocks. After acquiring a list of IP blocks for the GPU in use,
@@ -299,7 +298,6 @@ struct amd_ip_funcs {
 	int (*set_powergating_state)(void *handle,
 				     enum amd_powergating_state state);
 	void (*get_clockgating_state)(void *handle, u32 *flags);
-	int (*enable_umd_pstate)(void *handle, enum amd_dpm_forced_level *level);
 };
 
 

drivers/gpu/drm/amd/pm/amdgpu_pm.c

@@ -300,6 +300,10 @@ static ssize_t amdgpu_set_power_dpm_force_performance_level(struct device *dev,
 	struct amdgpu_device *adev = drm_to_adev(ddev);
 	enum amd_dpm_forced_level level;
 	enum amd_dpm_forced_level current_level;
+	uint32_t profile_mode_mask = AMD_DPM_FORCED_LEVEL_PROFILE_STANDARD |
+					AMD_DPM_FORCED_LEVEL_PROFILE_MIN_SCLK |
+					AMD_DPM_FORCED_LEVEL_PROFILE_MIN_MCLK |
+					AMD_DPM_FORCED_LEVEL_PROFILE_PEAK;
 	int ret = 0;
 
 	if (amdgpu_in_reset(adev))
@@ -354,10 +358,7 @@ static ssize_t amdgpu_set_power_dpm_force_performance_level(struct device *dev,
 	}
 
 	/* profile_exit setting is valid only when current mode is in profile mode */
-	if (!(current_level & (AMD_DPM_FORCED_LEVEL_PROFILE_STANDARD |
-	    AMD_DPM_FORCED_LEVEL_PROFILE_MIN_SCLK |
-	    AMD_DPM_FORCED_LEVEL_PROFILE_MIN_MCLK |
-	    AMD_DPM_FORCED_LEVEL_PROFILE_PEAK)) &&
+	if (!(current_level & profile_mode_mask) &&
 	    (level == AMD_DPM_FORCED_LEVEL_PROFILE_EXIT)) {
 		pr_err("Currently not in any profile mode!\n");
 		pm_runtime_mark_last_busy(ddev->dev);
@@ -365,6 +366,26 @@ static ssize_t amdgpu_set_power_dpm_force_performance_level(struct device *dev,
 		return -EINVAL;
 	}
 
+	if (!(current_level & profile_mode_mask) &&
+	      (level & profile_mode_mask)) {
+		/* enter UMD Pstate */
+		amdgpu_device_ip_set_powergating_state(adev,
+						       AMD_IP_BLOCK_TYPE_GFX,
+						       AMD_PG_STATE_UNGATE);
+		amdgpu_device_ip_set_clockgating_state(adev,
+						       AMD_IP_BLOCK_TYPE_GFX,
+						       AMD_CG_STATE_UNGATE);
+	} else if ((current_level & profile_mode_mask) &&
+		    !(level & profile_mode_mask)) {
+		/* exit UMD Pstate */
+		amdgpu_device_ip_set_clockgating_state(adev,
+						       AMD_IP_BLOCK_TYPE_GFX,
+						       AMD_CG_STATE_GATE);
+		amdgpu_device_ip_set_powergating_state(adev,
+						       AMD_IP_BLOCK_TYPE_GFX,
+						       AMD_PG_STATE_GATE);
+	}
+
 	if (amdgpu_dpm_force_performance_level(adev, level)) {
 		pm_runtime_mark_last_busy(ddev->dev);
 		pm_runtime_put_autosuspend(ddev->dev);

drivers/gpu/drm/amd/pm/legacy-dpm/legacy_dpm.c

@@ -953,6 +953,7 @@ static struct amdgpu_ps *amdgpu_dpm_pick_power_state(struct amdgpu_device *adev,
 
 static int amdgpu_dpm_change_power_state_locked(struct amdgpu_device *adev)
 {
+	const struct amd_pm_funcs *pp_funcs = adev->powerplay.pp_funcs;
 	struct amdgpu_ps *ps;
 	enum amd_pm_state_type dpm_state;
 	int ret;
@@ -976,7 +977,7 @@ static int amdgpu_dpm_change_power_state_locked(struct amdgpu_device *adev)
 	else
 		return -EINVAL;
 
-	if (amdgpu_dpm == 1 && adev->powerplay.pp_funcs->print_power_state) {
+	if (amdgpu_dpm == 1 && pp_funcs->print_power_state) {
 		printk("switching from power state:\n");
 		amdgpu_dpm_print_power_state(adev, adev->pm.dpm.current_ps);
 		printk("switching to power state:\n");
@@ -985,14 +986,14 @@ static int amdgpu_dpm_change_power_state_locked(struct amdgpu_device *adev)
 
 	/* update whether vce is active */
 	ps->vce_active = adev->pm.dpm.vce_active;
-	if (adev->powerplay.pp_funcs->display_configuration_changed)
+	if (pp_funcs->display_configuration_changed)
 		amdgpu_dpm_display_configuration_changed(adev);
 
 	ret = amdgpu_dpm_pre_set_power_state(adev);
 	if (ret)
 		return ret;
 
-	if (adev->powerplay.pp_funcs->check_state_equal) {
+	if (pp_funcs->check_state_equal) {
 		if (0 != amdgpu_dpm_check_state_equal(adev, adev->pm.dpm.current_ps, adev->pm.dpm.requested_ps, &equal))
 			equal = false;
 	}
@@ -1000,24 +1001,24 @@ static int amdgpu_dpm_change_power_state_locked(struct amdgpu_device *adev)
 	if (equal)
 		return 0;
 
-	if (adev->powerplay.pp_funcs->set_power_state)
-		adev->powerplay.pp_funcs->set_power_state(adev->powerplay.pp_handle);
+	if (pp_funcs->set_power_state)
+		pp_funcs->set_power_state(adev->powerplay.pp_handle);
 
 	amdgpu_dpm_post_set_power_state(adev);
 
 	adev->pm.dpm.current_active_crtcs = adev->pm.dpm.new_active_crtcs;
 	adev->pm.dpm.current_active_crtc_count = adev->pm.dpm.new_active_crtc_count;
 
-	if (adev->powerplay.pp_funcs->force_performance_level) {
+	if (pp_funcs->force_performance_level) {
 		if (adev->pm.dpm.thermal_active) {
 			enum amd_dpm_forced_level level = adev->pm.dpm.forced_level;
 			/* force low perf level for thermal */
-			amdgpu_dpm_force_performance_level(adev, AMD_DPM_FORCED_LEVEL_LOW);
+			pp_funcs->force_performance_level(adev, AMD_DPM_FORCED_LEVEL_LOW);
 			/* save the user's level */
 			adev->pm.dpm.forced_level = level;
 		} else {
 			/* otherwise, user selected level */
-			amdgpu_dpm_force_performance_level(adev, adev->pm.dpm.forced_level);
+			pp_funcs->force_performance_level(adev, adev->pm.dpm.forced_level);
 		}
 	}
 

drivers/gpu/drm/amd/pm/powerplay/amd_powerplay.c

@@ -323,12 +323,6 @@ static void pp_dpm_en_umd_pstate(struct pp_hwmgr  *hwmgr,
 		if (*level & profile_mode_mask) {
 			hwmgr->saved_dpm_level = hwmgr->dpm_level;
 			hwmgr->en_umd_pstate = true;
-			amdgpu_device_ip_set_powergating_state(hwmgr->adev,
-					AMD_IP_BLOCK_TYPE_GFX,
-					AMD_PG_STATE_UNGATE);
-			amdgpu_device_ip_set_clockgating_state(hwmgr->adev,
-						AMD_IP_BLOCK_TYPE_GFX,
-						AMD_CG_STATE_UNGATE);
 		}
 	} else {
 		/* exit umd pstate, restore level, enable gfx cg*/
@@ -336,12 +330,6 @@ static void pp_dpm_en_umd_pstate(struct pp_hwmgr  *hwmgr,
 			if (*level == AMD_DPM_FORCED_LEVEL_PROFILE_EXIT)
 				*level = hwmgr->saved_dpm_level;
 			hwmgr->en_umd_pstate = false;
-			amdgpu_device_ip_set_clockgating_state(hwmgr->adev,
-					AMD_IP_BLOCK_TYPE_GFX,
-					AMD_CG_STATE_GATE);
-			amdgpu_device_ip_set_powergating_state(hwmgr->adev,
-					AMD_IP_BLOCK_TYPE_GFX,
-					AMD_PG_STATE_GATE);
 		}
 	}
 }

drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c

@@ -1677,14 +1677,7 @@ static int smu_enable_umd_pstate(void *handle,
 		/* enter umd pstate, save current level, disable gfx cg*/
 		if (*level & profile_mode_mask) {
 			smu_dpm_ctx->saved_dpm_level = smu_dpm_ctx->dpm_level;
-			smu_dpm_ctx->enable_umd_pstate = true;
 			smu_gpo_control(smu, false);
-			amdgpu_device_ip_set_powergating_state(smu->adev,
-							       AMD_IP_BLOCK_TYPE_GFX,
-							       AMD_PG_STATE_UNGATE);
-			amdgpu_device_ip_set_clockgating_state(smu->adev,
-							       AMD_IP_BLOCK_TYPE_GFX,
-							       AMD_CG_STATE_UNGATE);
 			smu_gfx_ulv_control(smu, false);
 			smu_deep_sleep_control(smu, false);
 			amdgpu_asic_update_umd_stable_pstate(smu->adev, true);
@@ -1694,16 +1687,9 @@ static int smu_enable_umd_pstate(void *handle,
 		if (!(*level & profile_mode_mask)) {
 			if (*level == AMD_DPM_FORCED_LEVEL_PROFILE_EXIT)
 				*level = smu_dpm_ctx->saved_dpm_level;
-			smu_dpm_ctx->enable_umd_pstate = false;
 			amdgpu_asic_update_umd_stable_pstate(smu->adev, false);
 			smu_deep_sleep_control(smu, true);
 			smu_gfx_ulv_control(smu, true);
-			amdgpu_device_ip_set_clockgating_state(smu->adev,
-							       AMD_IP_BLOCK_TYPE_GFX,
-							       AMD_CG_STATE_GATE);
-			amdgpu_device_ip_set_powergating_state(smu->adev,
-							       AMD_IP_BLOCK_TYPE_GFX,
-							       AMD_PG_STATE_GATE);
 			smu_gpo_control(smu, true);
 		}
 	}
@@ -2149,7 +2135,6 @@ const struct amd_ip_funcs smu_ip_funcs = {
 	.soft_reset = NULL,
 	.set_clockgating_state = smu_set_clockgating_state,
 	.set_powergating_state = smu_set_powergating_state,
-	.enable_umd_pstate = smu_enable_umd_pstate,
 };
 
 const struct amdgpu_ip_block_version smu_v11_0_ip_block =

drivers/gpu/drm/amd/pm/swsmu/inc/amdgpu_smu.h

@@ -363,7 +363,6 @@ struct smu_dpm_context {
 	uint32_t dpm_context_size;
 	void *dpm_context;
 	void *golden_dpm_context;
-	bool enable_umd_pstate;
 	enum amd_dpm_forced_level dpm_level;
 	enum amd_dpm_forced_level saved_dpm_level;
 	enum amd_dpm_forced_level requested_dpm_level;