drm/radeon: add support for read reg query from radeon info ioctl

This allows us to query certain registers from userspace
for profiling and harvest configuration.  E.g., it can
be used by the GALLIUM_HUD for profiling the status of
various gfx blocks.

Tested-by: Marek Olšák <marek.olsak@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/uapi/drm/radeon_drm.h b/include/uapi/drm/radeon_drm.h
index de7ee21efea2..871e73f99a4d 100644
--- a/include/uapi/drm/radeon_drm.h
+++ b/include/uapi/drm/radeon_drm.h
@@ -1037,6 +1037,7 @@ struct drm_radeon_cs {
 #define RADEON_INFO_CURRENT_GPU_TEMP    0x21
 #define RADEON_INFO_CURRENT_GPU_SCLK    0x22
 #define RADEON_INFO_CURRENT_GPU_MCLK    0x23
+#define RADEON_INFO_READ_REG            0x24
 
 struct drm_radeon_info {
         uint32_t                request;