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-rw-r--r--drivers/gpu/drm/radeon/radeon_drv.c2
-rw-r--r--drivers/gpu/drm/radeon/radeon_kms.c11
-rw-r--r--include/drm/radeon_drm.h1
3 files changed, 13 insertions, 1 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_drv.c b/drivers/gpu/drm/radeon/radeon_drv.c
index 6c1161505582..63d2de8771dc 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
diff --git a/drivers/gpu/drm/radeon/radeon_kms.c b/drivers/gpu/drm/radeon/radeon_kms.c
index 4057ebf5195d..68a7b22c1fe9 100644
--- a/drivers/gpu/drm/radeon/radeon_kms.c
+++ b/drivers/gpu/drm/radeon/radeon_kms.c
@@ -205,6 +205,17 @@ int radeon_info_ioctl(struct drm_device *dev, void *data, struct drm_file *filp)
/* return clock value in KHz */
value = rdev->clock.spll.reference_freq * 10;
break;
+ case RADEON_INFO_NUM_BACKENDS:
+ if (rdev->family >= CHIP_CEDAR)
+ value = rdev->config.evergreen.max_backends;
+ else if (rdev->family >= CHIP_RV770)
+ value = rdev->config.rv770.max_backends;
+ else if (rdev->family >= CHIP_R600)
+ value = rdev->config.r600.max_backends;
+ else {
+ return -EINVAL;
+ }
+ break;
default:
DRM_DEBUG_KMS("Invalid request %d\n", info->request);
return -EINVAL;
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;