drm/radeon: add query to fetch the max engine clock (v2)

This is needed for reporting the max GPU engine clock
in OpenCL.  This just reports the max possible engine
clock, it does not take into account current conditions
that may limit that clock.

v2: fix query number for merge with 3.13

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/uapi/drm/radeon_drm.h b/include/uapi/drm/radeon_drm.h
index fe421e8a431b..d9ea3a73afe2 100644
--- a/include/uapi/drm/radeon_drm.h
+++ b/include/uapi/drm/radeon_drm.h
@@ -985,6 +985,8 @@ struct drm_radeon_cs {
 #define RADEON_INFO_CIK_MACROTILE_MODE_ARRAY    0x18
 /* query the number of render backends */
 #define RADEON_INFO_SI_BACKEND_ENABLED_MASK     0x19
+/* max engine clock - needed for OpenCL */
+#define RADEON_INFO_MAX_SCLK            0x1a
 
 
 struct drm_radeon_info {