drm/radeon: add new getparam for number of backends.

This allows userspace to work out how many DBs there are
for conditional rendering to work.

Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/drm/radeon_drm.h b/include/drm/radeon_drm.h
index e5c607a02d57..3dec41cf8342 100644
--- a/include/drm/radeon_drm.h
+++ b/include/drm/radeon_drm.h
@@ -908,6 +908,7 @@ struct drm_radeon_cs {
 #define RADEON_INFO_WANT_HYPERZ         0x07
 #define RADEON_INFO_WANT_CMASK          0x08 /* get access to CMASK on r300 */
 #define RADEON_INFO_CLOCK_CRYSTAL_FREQ  0x09 /* clock crystal frequency */
+#define RADEON_INFO_NUM_BACKENDS        0x0a /* DB/backends for r600+ - need for OQ */
 
 struct drm_radeon_info {
         uint32_t                request;