diff options
| author | Ben Widawsky <benjamin.widawsky@intel.com> | 2014-01-29 11:55:28 -0800 |
|---|---|---|
| committer | Ben Widawsky <benjamin.widawsky@intel.com> | 2014-02-19 22:19:19 -0800 |
| commit | 57882b4cfe7236833de09142e18fd1c2c0db4cbf (patch) | |
| tree | 2f804728449fc9493aa0ebede45ad3ef657d3874 | |
| parent | 836d7b87cce37cc9428711ba6371513c0324aba6 (diff) | |
DONT_MERGE drm/i915: FORCE_RESTORE for gen8 semaphores
This appears to not actually be needed on the current code. Just putting
it on the ML so we can point bug reports at it later.
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem_context.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem_context.c b/drivers/gpu/drm/i915/i915_gem_context.c index f8c21a6dd663..782f6333011f 100644 --- a/drivers/gpu/drm/i915/i915_gem_context.c +++ b/drivers/gpu/drm/i915/i915_gem_context.c @@ -655,6 +655,13 @@ static int do_switch(struct intel_ring_buffer *ring, if (!to->is_initialized || i915_gem_context_is_default(to)) hw_flags |= MI_RESTORE_INHIBIT; + /* When SW intends to use semaphore signaling between Command streamers, + * it must avoid lite restores in HW by programming "Force Restore" bit + * to ‘1’ in context descriptor during context submission + */ + if (IS_GEN8(ring->dev) && i915_semaphore_is_enabled(ring->dev)) + hw_flags |= MI_FORCE_RESTORE; + ret = mi_set_context(ring, to, hw_flags); if (ret) goto unpin_out; |