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drm/radeon: update ib_execute for SI (v2)

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When submitting a CONST_IB, emit a SWITCH_BUFFER
packet before the CONST_IB.  This isn't strictly necessary
(the driver will work fine without it), but is good practice
and allows for more flexible DE/CE sychronization options
in the future.  Current userspace drivers do not take
advantage of the CE yet.

v2: - clean up code flow a bit
    - no need to flush caches for CONST IB

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
This commit is contained in:
Alex Deucher
2012-07-17 14:02:29 -04:00
committed by Christian König
parent 4ef72566f1
commit a85a7da4c5
2 changed files with 29 additions and 21 deletions
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drivers/gpu/drm/radeon/sid.h
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@@ -901,5 +901,6 @@
#define PACKET3_WAIT_ON_DE_COUNTER_DIFF 0x88
#define PACKET3_SET_CE_DE_COUNTERS 0x89
#define PACKET3_WAIT_ON_AVAIL_BUFFER 0x8A
#define PACKET3_SWITCH_BUFFER 0x8B
#endif