amdgpu/pm: modify Powerplay API get_power_limit to use new pp_power enums

 updated {amd_pm_funcs}->get_power_limit() signature
 rewrote pp_get_power_limit to use new enums
 pp_get_power_limit now returns -EOPNOTSUPP for unknown power limit
 update calls to {amd_pm_funcs}->get_power_limit()

* Test Notes
* testing hardware was NAVI10 (tests SMU path)
** needs testing on VANGOGH
** needs testing on SMU < 11
** ie, one of
 TOPAZ, FIJI, TONGA, POLARIS10, POLARIS11, POLARIS12, VEGAM, CARRIZO,
 STONEY, VEGA10, VEGA12,VEGA20, RAVEN, BONAIRE, HAWAII

* Test
 AMDGPU_PCI_ADDR=`lspci -nn | grep "VGA\|Display" | cut -d " " -f 1`
 AMDGPU_HWMON=`ls -la /sys/class/hwmon | grep $AMDGPU_PCI_ADDR | cut -d " " -f 11`
 HWMON_DIR=/sys/class/hwmon/${AMDGPU_HWMON}

 lspci -nn | grep "VGA\|Display" ; \
 echo "=== power1 cap ===" ; cat $HWMON_DIR/power1_cap ;           \
 echo "=== power1 cap max ===" ; cat $HWMON_DIR/power1_cap_max ;   \
 echo "=== power1 cap def ===" ; cat $HWMON_DIR/power1_cap_default
Signed-off-by: Darren Powell <darren.powell@amd.com>
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -307,8 +307,9 @@ struct amd_pm_funcs {
 				uint32_t block_type, bool gate);
 	int (*set_clockgating_by_smu)(void *handle, uint32_t msg_id);
 	int (*set_power_limit)(void *handle, uint32_t n);
-	int (*get_power_limit)(void *handle, uint32_t *limit, uint32_t *max_limit,
-			bool default_limit);
+	int (*get_power_limit)(void *handle, uint32_t *limit,
+			enum pp_power_limit_level pp_limit_level,
+			enum pp_power_type power_type);
 	int (*get_power_profile_mode)(void *handle, char *buf);
 	int (*set_power_profile_mode)(void *handle, long *input, uint32_t size);
 	int (*set_fine_grain_clk_vol)(void *handle, uint32_t type, long *input, uint32_t size);

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

@@ -2908,8 +2908,8 @@ static ssize_t amdgpu_hwmon_show_power_cap_max(struct device *dev,
 	struct amdgpu_device *adev = dev_get_drvdata(dev);
 	const struct amd_pm_funcs *pp_funcs = adev->powerplay.pp_funcs;
 	enum pp_power_type power_type = to_sensor_dev_attr(attr)->index;
+	enum pp_power_limit_level pp_limit_level = PP_PWR_LIMIT_MAX;
 	uint32_t limit;
-	uint32_t max_limit = 0;
 	ssize_t size;
 	int r;
 
@@ -2925,12 +2925,13 @@ static ssize_t amdgpu_hwmon_show_power_cap_max(struct device *dev,
 	}
 
 	if (is_support_sw_smu(adev)) {
-		smu_get_power_limit(&adev->smu, &limit, PP_PWR_LIMIT_MAX, power_type);
+		smu_get_power_limit(&adev->smu, &limit,
+				    pp_limit_level, power_type);
 		size = snprintf(buf, PAGE_SIZE, "%u\n", limit * 1000000);
 	} else if (pp_funcs && pp_funcs->get_power_limit) {
-		pp_funcs->get_power_limit(adev->powerplay.pp_handle,
-				&limit, &max_limit, true);
-		size = snprintf(buf, PAGE_SIZE, "%u\n", max_limit * 1000000);
+		pp_funcs->get_power_limit(adev->powerplay.pp_handle, &limit,
+					  pp_limit_level, power_type);
+		size = snprintf(buf, PAGE_SIZE, "%u\n", limit * 1000000);
 	} else {
 		size = snprintf(buf, PAGE_SIZE, "\n");
 	}
@@ -2948,6 +2949,7 @@ static ssize_t amdgpu_hwmon_show_power_cap(struct device *dev,
 	struct amdgpu_device *adev = dev_get_drvdata(dev);
 	const struct amd_pm_funcs *pp_funcs = adev->powerplay.pp_funcs;
 	enum pp_power_type power_type = to_sensor_dev_attr(attr)->index;
+	enum pp_power_limit_level pp_limit_level = PP_PWR_LIMIT_CURRENT;
 	uint32_t limit;
 	ssize_t size;
 	int r;
@@ -2964,11 +2966,12 @@ static ssize_t amdgpu_hwmon_show_power_cap(struct device *dev,
 	}
 
 	if (is_support_sw_smu(adev)) {
-		smu_get_power_limit(&adev->smu, &limit, PP_PWR_LIMIT_CURRENT, power_type);
+		smu_get_power_limit(&adev->smu, &limit,
+				    pp_limit_level, power_type);
 		size = snprintf(buf, PAGE_SIZE, "%u\n", limit * 1000000);
 	} else if (pp_funcs && pp_funcs->get_power_limit) {
-		pp_funcs->get_power_limit(adev->powerplay.pp_handle,
-				&limit, NULL, false);
+		pp_funcs->get_power_limit(adev->powerplay.pp_handle, &limit,
+					  pp_limit_level, power_type);
 		size = snprintf(buf, PAGE_SIZE, "%u\n", limit * 1000000);
 	} else {
 		size = snprintf(buf, PAGE_SIZE, "\n");
@@ -2987,6 +2990,7 @@ static ssize_t amdgpu_hwmon_show_power_cap_default(struct device *dev,
 	struct amdgpu_device *adev = dev_get_drvdata(dev);
 	const struct amd_pm_funcs *pp_funcs = adev->powerplay.pp_funcs;
 	enum pp_power_type power_type = to_sensor_dev_attr(attr)->index;
+	enum pp_power_limit_level pp_limit_level = PP_PWR_LIMIT_DEFAULT;
 	uint32_t limit;
 	ssize_t size;
 	int r;
@@ -3003,11 +3007,12 @@ static ssize_t amdgpu_hwmon_show_power_cap_default(struct device *dev,
 	}
 
 	if (is_support_sw_smu(adev)) {
-		smu_get_power_limit(&adev->smu, &limit, PP_PWR_LIMIT_DEFAULT, power_type);
+		smu_get_power_limit(&adev->smu, &limit,
+				    pp_limit_level, power_type);
 		size = snprintf(buf, PAGE_SIZE, "%u\n", limit * 1000000);
 	} else if (pp_funcs && pp_funcs->get_power_limit) {
-		pp_funcs->get_power_limit(adev->powerplay.pp_handle,
-				&limit, NULL, true);
+		pp_funcs->get_power_limit(adev->powerplay.pp_handle, &limit,
+					  pp_limit_level, power_type);
 		size = snprintf(buf, PAGE_SIZE, "%u\n", limit * 1000000);
 	} else {
 		size = snprintf(buf, PAGE_SIZE, "\n");

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

@@ -1035,31 +1035,42 @@ static int pp_set_power_limit(void *handle, uint32_t limit)
 }
 
 static int pp_get_power_limit(void *handle, uint32_t *limit,
-		uint32_t *max_limit, bool default_limit)
+			      enum pp_power_limit_level pp_limit_level,
+			      enum pp_power_type power_type)
 {
 	struct pp_hwmgr *hwmgr = handle;
+	int ret = 0;
 
 	if (!hwmgr || !hwmgr->pm_en ||!limit)
 		return -EINVAL;
 
+	if (power_type != PP_PWR_TYPE_SUSTAINED)
+		return -EOPNOTSUPP;
+
 	mutex_lock(&hwmgr->smu_lock);
 
-	if (default_limit) {
+	switch (pp_limit_level) {
+		case PP_PWR_LIMIT_CURRENT:
+			*limit = hwmgr->power_limit;
+			break;
+		case PP_PWR_LIMIT_DEFAULT:
+			*limit = hwmgr->default_power_limit;
+			break;
+		case PP_PWR_LIMIT_MAX:
 			*limit = hwmgr->default_power_limit;
-		if (max_limit) {
-			*max_limit = *limit;
 			if (hwmgr->od_enabled) {
-				*max_limit *= (100 + hwmgr->platform_descriptor.TDPODLimit);
-				*max_limit /= 100;
-			}
+				*limit *= (100 + hwmgr->platform_descriptor.TDPODLimit);
+				*limit /= 100;
 			}
+			break;
+		default:
+			ret = -EOPNOTSUPP;
+			break;
 	}
-	else
-		*limit = hwmgr->power_limit;
 
 	mutex_unlock(&hwmgr->smu_lock);
 
-	return 0;
+	return ret;
 }
 
 static int pp_display_configuration_change(void *handle,