Am 31.07.2014 um 11:43 schrieb Michel Dänzer:
From: Michel Dänzer <michel.daenzer@xxxxxxx>
Signed-off-by: Michel Dänzer <michel.daenzer@xxxxxxx>
At least for PIPE_USAGE_STREAM buffers that's a bad idea, cause they are
used by VDPAU to read back to data to a CPU buffer and that's really
slow from VRAM.
Christian.
---
src/gallium/drivers/radeon/r600_buffer_common.c | 15 +++++++++++----
1 file changed, 11 insertions(+), 4 deletions(-)
diff --git a/src/gallium/drivers/radeon/r600_buffer_common.c b/src/gallium/drivers/radeon/r600_buffer_common.c
index 154c33d..d747cbc 100644
--- a/src/gallium/drivers/radeon/r600_buffer_common.c
+++ b/src/gallium/drivers/radeon/r600_buffer_common.c
@@ -110,14 +110,21 @@ bool r600_init_resource(struct r600_common_screen *rscreen,
enum radeon_bo_flag flags = 0;
switch (res->b.b.usage) {
- case PIPE_USAGE_DYNAMIC:
- case PIPE_USAGE_STREAM:
- flags = RADEON_FLAG_GTT_WC;
- /* fall through */
case PIPE_USAGE_STAGING:
/* Transfers are likely to occur more often with these resources. */
res->domains = RADEON_DOMAIN_GTT;
break;
+ case PIPE_USAGE_STREAM:
+ case PIPE_USAGE_DYNAMIC:
+ /* Older kernels didn't always flush the HDP cache before
+ * CS execution
+ */
+ if (rscreen->info.drm_minor < 40) {
+ res->domains = RADEON_DOMAIN_GTT;
+ flags = RADEON_FLAG_GTT_WC;
+ break;
+ }
+ /* fall through */
case PIPE_USAGE_DEFAULT:
case PIPE_USAGE_IMMUTABLE:
default:
_______________________________________________
dri-devel mailing list
dri-devel@xxxxxxxxxxxxxxxxxxxxx
http://lists.freedesktop.org/mailman/listinfo/dri-devel
