diff options
Diffstat (limited to 'drivers/gpu/drm/i915/i915_gem_context.c')
| -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 f77b4c126465..aa82fb4753ba 100644 --- a/drivers/gpu/drm/i915/i915_gem_context.c +++ b/drivers/gpu/drm/i915/i915_gem_context.c @@ -661,6 +661,13 @@ 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; |