drm/radeon/kms: manage r300 CMASK RAM access and allow CMASK clear

The CMASK RAM is for colorbuffer compression (used in conjunction
with MSAA). Only one user (filp) can access it.

The CMASK RAM access is managed in the same way as Hyper-Z, but there is
a separate ioctl, because an app that uses MSAA does not necessarily
have to use zbuffering.

Signed-off-by: Marek Olšák <maraeo@gmail.com>
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 10f8b53bdd40..e95a86b8b689 100644
--- a/include/drm/radeon_drm.h
+++ b/include/drm/radeon_drm.h
@@ -906,6 +906,7 @@ struct drm_radeon_cs {
 #define RADEON_INFO_ACCEL_WORKING2      0x05
 #define RADEON_INFO_TILING_CONFIG       0x06
 #define RADEON_INFO_WANT_HYPERZ         0x07
+#define RADEON_INFO_WANT_CMASK          0x08 /* get access to CMASK on r300 */
 
 struct drm_radeon_info {
         uint32_t                request;