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@xxxxxxxxxxxx> --- drivers/gpu/drm/i915/i915_gem_context.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/gpu/drm/i915/i915_gem_context.c b/drivers/gpu/drm/i915/i915_gem_context.c index f8c21a6..782f633 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; -- 1.9.0 _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
