drm/amdgpu/navi10: add uclk activity sensor

Query the metrics table for the current uclk activity.
Reviewed-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/powerplay/navi10_ppt.c

@@ -879,6 +879,7 @@ static int navi10_get_gpu_power(struct smu_context *smu, uint32_t *value)
 }
 
 static int navi10_get_current_activity_percent(struct smu_context *smu,
+					       enum amd_pp_sensors sensor,
 					       uint32_t *value)
 {
 	int ret = 0;
@@ -894,7 +895,17 @@ static int navi10_get_current_activity_percent(struct smu_context *smu,
 	if (ret)
 		return ret;
 
-	*value = metrics.AverageGfxActivity;
+	switch (sensor) {
+	case AMDGPU_PP_SENSOR_GPU_LOAD:
+		*value = metrics.AverageGfxActivity;
+		break;
+	case AMDGPU_PP_SENSOR_MEM_LOAD:
+		*value = metrics.AverageUclkActivity;
+		break;
+	default:
+		pr_err("Invalid sensor for retrieving clock activity\n");
+		return -EINVAL;
+	}
 
 	return 0;
 }
@@ -1307,8 +1318,9 @@ static int navi10_read_sensor(struct smu_context *smu,
 		*(uint32_t *)data = pptable->FanMaximumRpm;
 		*size = 4;
 		break;
+	case AMDGPU_PP_SENSOR_MEM_LOAD:
 	case AMDGPU_PP_SENSOR_GPU_LOAD:
-		ret = navi10_get_current_activity_percent(smu, (uint32_t *)data);
+		ret = navi10_get_current_activity_percent(smu, sensor, (uint32_t *)data);
 		*size = 4;
 		break;
 	case AMDGPU_PP_SENSOR_GPU_POWER: