drm/radeon: add INFO query for current sclk/mclk

Allow the UMDs to query the current sclk/mclk
for profiling, etc.
Tested-by: NMarek Olšák <marek.olsak@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/radeon/radeon_kms.c

@@ -554,6 +554,20 @@ static int radeon_info_ioctl(struct drm_device *dev, void *data, struct drm_file
 		else
 			*value = 0;
 		break;
+	case RADEON_INFO_CURRENT_GPU_SCLK:
+		/* get sclk in Mhz */
+		if (rdev->pm.dpm_enabled)
+			*value = radeon_dpm_get_current_sclk(rdev) / 100;
+		else
+			*value = rdev->pm.current_sclk / 100;
+		break;
+	case RADEON_INFO_CURRENT_GPU_MCLK:
+		/* get mclk in Mhz */
+		if (rdev->pm.dpm_enabled)
+			*value = radeon_dpm_get_current_mclk(rdev) / 100;
+		else
+			*value = rdev->pm.current_mclk / 100;
+		break;
 	default:
 		DRM_DEBUG_KMS("Invalid request %d\n", info->request);
 		return -EINVAL;

include/uapi/drm/radeon_drm.h

@@ -1035,6 +1035,8 @@ struct drm_radeon_cs {
 #define RADEON_INFO_GTT_USAGE		0x1f
 #define RADEON_INFO_ACTIVE_CU_COUNT	0x20
 #define RADEON_INFO_CURRENT_GPU_TEMP	0x21
+#define RADEON_INFO_CURRENT_GPU_SCLK	0x22
+#define RADEON_INFO_CURRENT_GPU_MCLK	0x23
 
 struct drm_radeon_info {
 	uint32_t		request;