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 <maraeo@gmail.com>, 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 <airlied@redhat.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/src/gallium/drivers/r300/r300_state_derived.c b/src/gallium/drivers/r300/r300_state_derived.c
index 66f64f0f6a..f3dad4c292 100644
--- a/src/gallium/drivers/r300/r300_state_derived.c
+++ b/src/gallium/drivers/r300/r300_state_derived.c
@@ -35,6 +35,7 @@
 #include "r300_state_inlines.h"
 #include "r300_texture.h"
 #include "r300_vs.h"
+#include "r300_winsys.h"
 
 /* r300_state_derived: Various bits of state which are dependent upon
  * currently bound CSO data. */
@@ -693,5 +694,6 @@ void r300_update_derived_state(struct r300_context* r300)
         }
     }
 
-    r300_update_hyperz_state(r300);
+    if (r300->rws->get_value(r300->rws, R300_CAN_HYPERZ))
+        r300_update_hyperz_state(r300);
 }