drm/amd/pm: Support for getting power1_cap_min value

Support for getting power1_cap_min value on smu13 and smu11.
For other Asics, we still use 0 as the default value.
Signed-off-by: Ma Jun <Jun.Ma2@amd.com>
Reviewed-by: Kenneth Feng <kenneth.feng@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -2921,14 +2921,6 @@ static ssize_t amdgpu_hwmon_show_power_input(struct device *dev,
 	return sysfs_emit(buf, "%zd\n", val);
 }
 
-static ssize_t amdgpu_hwmon_show_power_cap_min(struct device *dev,
-					 struct device_attribute *attr,
-					 char *buf)
-{
-	return sysfs_emit(buf, "%i\n", 0);
-}
-
-
 static ssize_t amdgpu_hwmon_show_power_cap_generic(struct device *dev,
 					struct device_attribute *attr,
 					char *buf,
@@ -2965,6 +2957,12 @@ static ssize_t amdgpu_hwmon_show_power_cap_generic(struct device *dev,
 	return size;
 }
 
+static ssize_t amdgpu_hwmon_show_power_cap_min(struct device *dev,
+					 struct device_attribute *attr,
+					 char *buf)
+{
+	return amdgpu_hwmon_show_power_cap_generic(dev, attr, buf, PP_PWR_LIMIT_MIN);
+}
 
 static ssize_t amdgpu_hwmon_show_power_cap_max(struct device *dev,
 					 struct device_attribute *attr,

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

@@ -849,7 +849,8 @@ static int smu_late_init(void *handle)
 	ret = smu_get_asic_power_limits(smu,
 					&smu->current_power_limit,
 					&smu->default_power_limit,
-					&smu->max_power_limit);
+					&smu->max_power_limit,
+					&smu->min_power_limit);
 	if (ret) {
 		dev_err(adev->dev, "Failed to get asic power limits!\n");
 		return ret;
@@ -2447,6 +2448,8 @@ int smu_get_power_limit(void *handle,
 		limit_level = SMU_PPT_LIMIT_MAX;
 		break;
 	case PP_PWR_LIMIT_MIN:
+		limit_level = SMU_PPT_LIMIT_MIN;
+		break;
 	default:
 		return -EOPNOTSUPP;
 		break;
@@ -2466,8 +2469,7 @@ int smu_get_power_limit(void *handle,
 			case IP_VERSION(11, 0, 13):
 				ret = smu_get_asic_power_limits(smu,
 								&smu->current_power_limit,
-								NULL,
-								NULL);
+								NULL, NULL, NULL);
 				break;
 			default:
 				break;
@@ -2480,6 +2482,9 @@ int smu_get_power_limit(void *handle,
 		case SMU_PPT_LIMIT_MAX:
 			*limit = smu->max_power_limit;
 			break;
+		case SMU_PPT_LIMIT_MIN:
+			*limit = smu->min_power_limit;
+			break;
 		default:
 			break;
 		}
@@ -2502,10 +2507,10 @@ static int smu_set_power_limit(void *handle, uint32_t limit)
 		if (smu->ppt_funcs->set_power_limit)
 			return smu->ppt_funcs->set_power_limit(smu, limit_type, limit);
 
-	if (limit > smu->max_power_limit) {
+	if ((limit > smu->max_power_limit) || (limit < smu->min_power_limit)) {
 		dev_err(smu->adev->dev,
-			"New power limit (%d) is over the max allowed %d\n",
-			limit, smu->max_power_limit);
+			"New power limit (%d) is out of range [%d,%d]\n",
+			limit, smu->min_power_limit, smu->max_power_limit);
 		return -EINVAL;
 	}
 

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

@@ -500,6 +500,7 @@ struct smu_context {
 	uint32_t current_power_limit;
 	uint32_t default_power_limit;
 	uint32_t max_power_limit;
+	uint32_t min_power_limit;
 
 	/* soft pptable */
 	uint32_t ppt_offset_bytes;
@@ -821,9 +822,10 @@ struct pptable_funcs {
 	 * @get_power_limit: Get the device's power limits.
 	 */
 	int (*get_power_limit)(struct smu_context *smu,
-			       uint32_t *current_power_limit,
-			       uint32_t *default_power_limit,
-			       uint32_t *max_power_limit);
+					uint32_t *current_power_limit,
+					uint32_t *default_power_limit,
+					uint32_t *max_power_limit,
+					uint32_t *min_power_limit);
 
 	/**
 	 * @get_ppt_limit: Get the device's ppt limits.

drivers/gpu/drm/amd/pm/swsmu/smu11/arcturus_ppt.c

@@ -1278,14 +1278,15 @@ static int arcturus_get_fan_parameters(struct smu_context *smu)
 }
 
 static int arcturus_get_power_limit(struct smu_context *smu,
-				    uint32_t *current_power_limit,
-				    uint32_t *default_power_limit,
-				    uint32_t *max_power_limit)
+					uint32_t *current_power_limit,
+					uint32_t *default_power_limit,
+					uint32_t *max_power_limit,
+					uint32_t *min_power_limit)
 {
 	struct smu_11_0_powerplay_table *powerplay_table =
 		(struct smu_11_0_powerplay_table *)smu->smu_table.power_play_table;
 	PPTable_t *pptable = smu->smu_table.driver_pptable;
-	uint32_t power_limit, od_percent;
+	uint32_t power_limit, od_percent_upper, od_percent_lower;
 
 	if (smu_v11_0_get_current_power_limit(smu, &power_limit)) {
 		/* the last hope to figure out the ppt limit */
@@ -1302,17 +1303,25 @@ static int arcturus_get_power_limit(struct smu_context *smu,
 	if (default_power_limit)
 		*default_power_limit = power_limit;
 
-	if (max_power_limit) {
-		if (smu->od_enabled) {
-			od_percent = le32_to_cpu(powerplay_table->overdrive_table.max[SMU_11_0_ODSETTING_POWERPERCENTAGE]);
+	if (smu->od_enabled) {
+		od_percent_upper = le32_to_cpu(powerplay_table->overdrive_table.max[SMU_11_0_ODSETTING_POWERPERCENTAGE]);
+		od_percent_lower = le32_to_cpu(powerplay_table->overdrive_table.min[SMU_11_0_ODSETTING_POWERPERCENTAGE]);
+	} else {
+		od_percent_upper = 0;
+		od_percent_lower = 100;
+	}
 
-			dev_dbg(smu->adev->dev, "ODSETTING_POWERPERCENTAGE: %d (default: %d)\n", od_percent, power_limit);
+	dev_dbg(smu->adev->dev, "od percent upper:%d, od percent lower:%d (default power: %d)\n",
+							od_percent_upper, od_percent_lower, power_limit);
 
-			power_limit *= (100 + od_percent);
-			power_limit /= 100;
-		}
+	if (max_power_limit) {
+		*max_power_limit = power_limit * (100 + od_percent_upper);
+		*max_power_limit /= 100;
+	}
 
-		*max_power_limit = power_limit;
+	if (min_power_limit) {
+		*min_power_limit = power_limit * (100 - od_percent_lower);
+		*min_power_limit /= 100;
 	}
 
 	return 0;

drivers/gpu/drm/amd/pm/swsmu/smu11/navi10_ppt.c

@@ -2330,15 +2330,16 @@ static int navi10_display_disable_memory_clock_switch(struct smu_context *smu,
 }
 
 static int navi10_get_power_limit(struct smu_context *smu,
-				  uint32_t *current_power_limit,
-				  uint32_t *default_power_limit,
-				  uint32_t *max_power_limit)
+					uint32_t *current_power_limit,
+					uint32_t *default_power_limit,
+					uint32_t *max_power_limit,
+					uint32_t *min_power_limit)
 {
 	struct smu_11_0_powerplay_table *powerplay_table =
 		(struct smu_11_0_powerplay_table *)smu->smu_table.power_play_table;
 	struct smu_11_0_overdrive_table *od_settings = smu->od_settings;
 	PPTable_t *pptable = smu->smu_table.driver_pptable;
-	uint32_t power_limit, od_percent;
+	uint32_t power_limit, od_percent_upper, od_percent_lower;
 
 	if (smu_v11_0_get_current_power_limit(smu, &power_limit)) {
 		/* the last hope to figure out the ppt limit */
@@ -2355,18 +2356,26 @@ static int navi10_get_power_limit(struct smu_context *smu,
 	if (default_power_limit)
 		*default_power_limit = power_limit;
 
-	if (max_power_limit) {
-		if (smu->od_enabled &&
+	if (smu->od_enabled &&
 		    navi10_od_feature_is_supported(od_settings, SMU_11_0_ODCAP_POWER_LIMIT)) {
-			od_percent = le32_to_cpu(powerplay_table->overdrive_table.max[SMU_11_0_ODSETTING_POWERPERCENTAGE]);
+		od_percent_upper = le32_to_cpu(powerplay_table->overdrive_table.max[SMU_11_0_ODSETTING_POWERPERCENTAGE]);
+		od_percent_lower = le32_to_cpu(powerplay_table->overdrive_table.min[SMU_11_0_ODSETTING_POWERPERCENTAGE]);
+	} else {
+		od_percent_upper = 0;
+		od_percent_lower = 100;
+	}
 
-			dev_dbg(smu->adev->dev, "ODSETTING_POWERPERCENTAGE: %d (default: %d)\n", od_percent, power_limit);
+	dev_dbg(smu->adev->dev, "od percent upper:%d, od percent lower:%d (default power: %d)\n",
+					od_percent_upper, od_percent_lower, power_limit);
 
-			power_limit *= (100 + od_percent);
-			power_limit /= 100;
-		}
+	if (max_power_limit) {
+		*max_power_limit = power_limit * (100 + od_percent_upper);
+		*max_power_limit /= 100;
+	}
 
-		*max_power_limit = power_limit;
+	if (min_power_limit) {
+		*min_power_limit = power_limit * (100 - od_percent_lower);
+		*min_power_limit /= 100;
 	}
 
 	return 0;

drivers/gpu/drm/amd/pm/swsmu/smu11/sienna_cichlid_ppt.c

@@ -620,11 +620,12 @@ static uint32_t sienna_cichlid_get_throttler_status_locked(struct smu_context *s
 static int sienna_cichlid_get_power_limit(struct smu_context *smu,
 					  uint32_t *current_power_limit,
 					  uint32_t *default_power_limit,
-					  uint32_t *max_power_limit)
+					  uint32_t *max_power_limit,
+					  uint32_t *min_power_limit)
 {
 	struct smu_11_0_7_powerplay_table *powerplay_table =
 		(struct smu_11_0_7_powerplay_table *)smu->smu_table.power_play_table;
-	uint32_t power_limit, od_percent;
+	uint32_t power_limit, od_percent_upper, od_percent_lower;
 	uint16_t *table_member;
 
 	GET_PPTABLE_MEMBER(SocketPowerLimitAc, &table_member);
@@ -639,21 +640,26 @@ static int sienna_cichlid_get_power_limit(struct smu_context *smu,
 	if (default_power_limit)
 		*default_power_limit = power_limit;
 
-	if (max_power_limit) {
-		if (smu->od_enabled) {
-			od_percent =
-				le32_to_cpu(powerplay_table->overdrive_table.max[
-							SMU_11_0_7_ODSETTING_POWERPERCENTAGE]);
+	if (smu->od_enabled) {
+		od_percent_upper = le32_to_cpu(powerplay_table->overdrive_table.max[SMU_11_0_7_ODSETTING_POWERPERCENTAGE]);
+		od_percent_lower = le32_to_cpu(powerplay_table->overdrive_table.min[SMU_11_0_7_ODSETTING_POWERPERCENTAGE]);
+	} else {
+		od_percent_upper = 0;
+		od_percent_lower = 100;
+	}
 
-			dev_dbg(smu->adev->dev, "ODSETTING_POWERPERCENTAGE: %d (default: %d)\n",
-					od_percent, power_limit);
+	dev_dbg(smu->adev->dev, "od percent upper:%d, od percent lower:%d (default power: %d)\n",
+					od_percent_upper, od_percent_lower, power_limit);
 
-			power_limit *= (100 + od_percent);
-			power_limit /= 100;
-		}
-		*max_power_limit = power_limit;
+	if (max_power_limit) {
+		*max_power_limit = power_limit * (100 + od_percent_upper);
+		*max_power_limit /= 100;
 	}
 
+	if (min_power_limit) {
+		*min_power_limit = power_limit * (100 - od_percent_lower);
+		*min_power_limit /= 100;
+	}
 	return 0;
 }
 
@@ -672,7 +678,7 @@ static void sienna_cichlid_get_smartshift_power_percentage(struct smu_context *s
 	uint32_t cur_power_limit;
 
 	if (metrics_v4->ApuSTAPMSmartShiftLimit != 0) {
-		sienna_cichlid_get_power_limit(smu, &cur_power_limit, NULL, NULL);
+		sienna_cichlid_get_power_limit(smu, &cur_power_limit, NULL, NULL, NULL);
 		apu_power_limit = metrics_v4->ApuSTAPMLimit;
 		dgpu_power_limit = cur_power_limit;
 		powerRatio = (((apu_power_limit +

drivers/gpu/drm/amd/pm/swsmu/smu11/vangogh_ppt.c

@@ -2314,7 +2314,8 @@ static u32 vangogh_get_gfxoff_status(struct smu_context *smu)
 static int vangogh_get_power_limit(struct smu_context *smu,
 				   uint32_t *current_power_limit,
 				   uint32_t *default_power_limit,
-				   uint32_t *max_power_limit)
+				   uint32_t *max_power_limit,
+				   uint32_t *min_power_limit)
 {
 	struct smu_11_5_power_context *power_context =
 								smu->smu_power.power_context;
@@ -2336,6 +2337,8 @@ static int vangogh_get_power_limit(struct smu_context *smu,
 		*default_power_limit = ppt_limit / 1000;
 	if (max_power_limit)
 		*max_power_limit = 29;
+	if (min_power_limit)
+		*min_power_limit = 0;
 
 	ret = smu_cmn_send_smc_msg(smu, SMU_MSG_GetFastPPTLimit, &ppt_limit);
 	if (ret) {

drivers/gpu/drm/amd/pm/swsmu/smu13/aldebaran_ppt.c

@@ -1139,9 +1139,10 @@ static int aldebaran_read_sensor(struct smu_context *smu,
 }
 
 static int aldebaran_get_power_limit(struct smu_context *smu,
-				     uint32_t *current_power_limit,
-				     uint32_t *default_power_limit,
-				     uint32_t *max_power_limit)
+						uint32_t *current_power_limit,
+						uint32_t *default_power_limit,
+						uint32_t *max_power_limit,
+						uint32_t *min_power_limit)
 {
 	PPTable_t *pptable = smu->smu_table.driver_pptable;
 	uint32_t power_limit = 0;
@@ -1154,7 +1155,8 @@ static int aldebaran_get_power_limit(struct smu_context *smu,
 			*default_power_limit = 0;
 		if (max_power_limit)
 			*max_power_limit = 0;
-
+		if (min_power_limit)
+			*min_power_limit = 0;
 		dev_warn(smu->adev->dev,
 			"PPT feature is not enabled, power values can't be fetched.");
 
@@ -1189,6 +1191,9 @@ static int aldebaran_get_power_limit(struct smu_context *smu,
 			*max_power_limit = pptable->PptLimit;
 	}
 
+	if (min_power_limit)
+		*min_power_limit = 0;
+
 	return 0;
 }
 

drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_0_ppt.c

@@ -2341,16 +2341,17 @@ static int smu_v13_0_0_enable_mgpu_fan_boost(struct smu_context *smu)
 }
 
 static int smu_v13_0_0_get_power_limit(struct smu_context *smu,
-				       uint32_t *current_power_limit,
-				       uint32_t *default_power_limit,
-				       uint32_t *max_power_limit)
+						uint32_t *current_power_limit,
+						uint32_t *default_power_limit,
+						uint32_t *max_power_limit,
+						uint32_t *min_power_limit)
 {
 	struct smu_table_context *table_context = &smu->smu_table;
 	struct smu_13_0_0_powerplay_table *powerplay_table =
 		(struct smu_13_0_0_powerplay_table *)table_context->power_play_table;
 	PPTable_t *pptable = table_context->driver_pptable;
 	SkuTable_t *skutable = &pptable->SkuTable;
-	uint32_t power_limit, od_percent;
+	uint32_t power_limit, od_percent_upper, od_percent_lower;
 
 	if (smu_v13_0_get_current_power_limit(smu, &power_limit))
 		power_limit = smu->adev->pm.ac_power ?
@@ -2362,16 +2363,25 @@ static int smu_v13_0_0_get_power_limit(struct smu_context *smu,
 	if (default_power_limit)
 		*default_power_limit = power_limit;
 
-	if (max_power_limit) {
-		if (smu->od_enabled) {
-			od_percent = le32_to_cpu(powerplay_table->overdrive_table.max[SMU_13_0_0_ODSETTING_POWERPERCENTAGE]);
+	if (smu->od_enabled) {
+		od_percent_upper = le32_to_cpu(powerplay_table->overdrive_table.max[SMU_13_0_0_ODSETTING_POWERPERCENTAGE]);
+		od_percent_lower = le32_to_cpu(powerplay_table->overdrive_table.min[SMU_13_0_0_ODSETTING_POWERPERCENTAGE]);
+	} else {
+		od_percent_upper = 0;
+		od_percent_lower = 100;
+	}
 
-			dev_dbg(smu->adev->dev, "ODSETTING_POWERPERCENTAGE: %d (default: %d)\n", od_percent, power_limit);
+	dev_dbg(smu->adev->dev, "od percent upper:%d, od percent lower:%d (default power: %d)\n",
+					od_percent_upper, od_percent_lower, power_limit);
 
-			power_limit *= (100 + od_percent);
-			power_limit /= 100;
-		}
-		*max_power_limit = power_limit;
+	if (max_power_limit) {
+		*max_power_limit = power_limit * (100 + od_percent_upper);
+		*max_power_limit /= 100;
+	}
+
+	if (min_power_limit) {
+		*min_power_limit = power_limit * (100 - od_percent_lower);
+		*min_power_limit /= 100;
 	}
 
 	return 0;

drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_6_ppt.c

@@ -1309,9 +1309,10 @@ static int smu_v13_0_6_read_sensor(struct smu_context *smu,
 }
 
 static int smu_v13_0_6_get_power_limit(struct smu_context *smu,
-				       uint32_t *current_power_limit,
-				       uint32_t *default_power_limit,
-				       uint32_t *max_power_limit)
+						uint32_t *current_power_limit,
+						uint32_t *default_power_limit,
+						uint32_t *max_power_limit,
+						uint32_t *min_power_limit)
 {
 	struct smu_table_context *smu_table = &smu->smu_table;
 	struct PPTable_t *pptable =
@@ -1335,6 +1336,8 @@ static int smu_v13_0_6_get_power_limit(struct smu_context *smu,
 		*max_power_limit = pptable->MaxSocketPowerLimit;
 	}
 
+	if (min_power_limit)
+		*min_power_limit = 0;
 	return 0;
 }
 

drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_7_ppt.c

@@ -2304,16 +2304,17 @@ static int smu_v13_0_7_enable_mgpu_fan_boost(struct smu_context *smu)
 }
 
 static int smu_v13_0_7_get_power_limit(struct smu_context *smu,
-				       uint32_t *current_power_limit,
-				       uint32_t *default_power_limit,
-				       uint32_t *max_power_limit)
+						uint32_t *current_power_limit,
+						uint32_t *default_power_limit,
+						uint32_t *max_power_limit,
+						uint32_t *min_power_limit)
 {
 	struct smu_table_context *table_context = &smu->smu_table;
 	struct smu_13_0_7_powerplay_table *powerplay_table =
 		(struct smu_13_0_7_powerplay_table *)table_context->power_play_table;
 	PPTable_t *pptable = table_context->driver_pptable;
 	SkuTable_t *skutable = &pptable->SkuTable;
-	uint32_t power_limit, od_percent;
+	uint32_t power_limit, od_percent_upper, od_percent_lower;
 
 	if (smu_v13_0_get_current_power_limit(smu, &power_limit))
 		power_limit = smu->adev->pm.ac_power ?
@@ -2325,16 +2326,25 @@ static int smu_v13_0_7_get_power_limit(struct smu_context *smu,
 	if (default_power_limit)
 		*default_power_limit = power_limit;
 
-	if (max_power_limit) {
-		if (smu->od_enabled) {
-			od_percent = le32_to_cpu(powerplay_table->overdrive_table.max[SMU_13_0_7_ODSETTING_POWERPERCENTAGE]);
+	if (smu->od_enabled) {
+		od_percent_upper = le32_to_cpu(powerplay_table->overdrive_table.max[SMU_13_0_7_ODSETTING_POWERPERCENTAGE]);
+		od_percent_lower = le32_to_cpu(powerplay_table->overdrive_table.min[SMU_13_0_7_ODSETTING_POWERPERCENTAGE]);
+	} else {
+		od_percent_upper = 0;
+		od_percent_lower = 100;
+	}
 
-			dev_dbg(smu->adev->dev, "ODSETTING_POWERPERCENTAGE: %d (default: %d)\n", od_percent, power_limit);
+	dev_dbg(smu->adev->dev, "od percent upper:%d, od percent lower:%d (default power: %d)\n",
+					od_percent_upper, od_percent_lower, power_limit);
 
-			power_limit *= (100 + od_percent);
-			power_limit /= 100;
-		}
-		*max_power_limit = power_limit;
+	if (max_power_limit) {
+		*max_power_limit = power_limit * (100 + od_percent_upper);
+		*max_power_limit /= 100;
+	}
+
+	if (min_power_limit) {
+		*min_power_limit = power_limit * (100 - od_percent_lower);
+		*min_power_limit /= 100;
 	}
 
 	return 0;

drivers/gpu/drm/amd/pm/swsmu/smu_internal.h

@@ -85,7 +85,7 @@
 #define smu_i2c_fini(smu)                                               smu_ppt_funcs(i2c_fini, 0, smu)
 #define smu_get_unique_id(smu)						smu_ppt_funcs(get_unique_id, 0, smu)
 #define smu_log_thermal_throttling(smu)					smu_ppt_funcs(log_thermal_throttling_event, 0, smu)
-#define smu_get_asic_power_limits(smu, current, default, max)		smu_ppt_funcs(get_power_limit, 0, smu, current, default, max)
+#define smu_get_asic_power_limits(smu, current, default, max, min)		smu_ppt_funcs(get_power_limit, 0, smu, current, default, max, min)
 #define smu_get_pp_feature_mask(smu, buf)				smu_ppt_funcs(get_pp_feature_mask, 0, smu, buf)
 #define smu_set_pp_feature_mask(smu, new_mask)				smu_ppt_funcs(set_pp_feature_mask, 0, smu, new_mask)
 #define smu_gfx_ulv_control(smu, enablement)				smu_ppt_funcs(gfx_ulv_control, 0, smu, enablement)