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>
diff --git a/drivers/gpu/drm/radeon/radeon_drv.c b/drivers/gpu/drm/radeon/radeon_drv.c
index 6c11615..63d2de8 100644
--- a/drivers/gpu/drm/radeon/radeon_drv.c
+++ b/drivers/gpu/drm/radeon/radeon_drv.c
@@ -49,7 +49,7 @@
* - 2.6.0 - add tiling config query (r6xx+), add initial HiZ support (r300->r500)
* 2.7.0 - fixups for r600 2D tiling support. (no external ABI change), add eg dyn gpr regs
* 2.8.0 - pageflip support, r500 US_FORMAT regs. r500 ARGB2101010 colorbuf, r300->r500 CMASK, clock crystal query
- * 2.9.0 - r600 tiling (s3tc,rgtc) working, SET_PREDICATION packet 3 on r600 + eg
+ * 2.9.0 - r600 tiling (s3tc,rgtc) working, SET_PREDICATION packet 3 on r600 + eg, backend query
*/
#define KMS_DRIVER_MAJOR 2
#define KMS_DRIVER_MINOR 9