path: root/src/gallium/winsys/radeon/drm/radeon_drm.c
diff options
authorDave Airlie <>2010-07-07 15:20:19 +0200
committerDave Airlie <>2010-08-05 20:32:05 +1000
commit6eb2a7fbafd49e75b6cbbee57f23dda63eff73ef (patch)
treec52af432fc6562ece8a18592b67c9872897f4867 /src/gallium/winsys/radeon/drm/radeon_drm.c
parentccbd9ae7cc5b3fcda23fe79573e70b4fc40f3939 (diff)
r300g: implement hyper-z support. (v4)
This implements fast Z clear, Z compression, and HiZ support for r300->r500 GPUs. It also allows cbzb clears when fast Z clears are being used for the ZB. It requires a kernel with hyper-z support. Thanks to Marek Olšák <>, who started this off, and Alex Deucher at AMD for providing lots of hints. v2: squashed zmask ram size fix] squashed r300g/blitter: fix Z readback when compressed] v3: rebase around texture changes in master - .1 fix more bits v4: migrated to using u_mm in r300_texture to manage hiz/zmask rams consistently disabled HiZ when using OQ flush z-cache before turning hyper-z off update hyper-z state on dsa state change store depthclearvalue across cbzb clears and replace it afterwards. Signed-off-by: Dave Airlie <>
Diffstat (limited to 'src/gallium/winsys/radeon/drm/radeon_drm.c')
1 files changed, 10 insertions, 0 deletions
diff --git a/src/gallium/winsys/radeon/drm/radeon_drm.c b/src/gallium/winsys/radeon/drm/radeon_drm.c
index e9a276362f3..e7057ca593b 100644
--- a/src/gallium/winsys/radeon/drm/radeon_drm.c
+++ b/src/gallium/winsys/radeon/drm/radeon_drm.c
@@ -130,6 +130,16 @@ static void do_ioctls(int fd, struct radeon_libdrm_winsys* winsys)
winsys->z_pipes = target;
+ winsys->hyperz = FALSE;
+ info.request = RADEON_INFO_WANT_HYPERZ;
+ retval = drmCommandWriteRead(fd, DRM_RADEON_INFO, &info, sizeof(info));
+ if (!retval && target == 1) {
+ winsys->hyperz = TRUE;
+ }
retval = drmCommandWriteRead(fd, DRM_RADEON_GEM_INFO,
&gem_info, sizeof(gem_info));
if (retval) {