Hi Tom and Alex,
It looks like you specifically want this to be applied to 3.8-stable:
commit e5b9e7503eb1f4884efa3b321d3cc47806779202
Author: Tom Stellard <thomas.stellard@xxxxxxx>
Date: Fri Aug 16 17:47:39 2013 -0400
drm/radeon/si: Add support for CP DMA to CS checker for compute v2
+++ b/include/uapi/drm/radeon_drm.h
@@ -979,6 +979,8 @@ struct drm_radeon_cs {
+/* query if CP DMA is supported on the compute ring */
+#define RADEON_INFO_SI_CP_DMA_COMPUTE 0x17
But it doesn't apply cleanly to 3.8-stable[1] because the nearby defines
and code for these other features are not present in 3.8:
/* fast fb access is enabled */
#define RADEON_INFO_FASTFB_WORKING 0x14
/* query if a RADEON_CS_RING_* submission is supported */
#define RADEON_INFO_RING_WORKING 0x15
/* SI tile mode array */
#define RADEON_INFO_SI_TILE_MODE_ARRAY 0x16
It looks like it would be no trouble for me to backport just the new
SI_CP_DMA_COMPUTE bits (I could just ignore the context diff there).
Would that be reasonable, or do I need to also pick up any/all of those
other three RADEON_INFO features for your CP DMA support to work in 3.8?
Thanks,
-Kamal
[0] http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.8.y
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