On 06/05/2021 20:14, Matthew Brost wrote:
Disable semaphores when using GuC scheduling as semaphores are broken in
the current GuC firmware.
What is "current"? Given that the patch itself is like year and a half old.
Regards,
Tvrtko
Cc: John Harrison <john.c.harrison@xxxxxxxxx>
Signed-off-by: Matthew Brost <matthew.brost@xxxxxxxxx>
---
drivers/gpu/drm/i915/gem/i915_gem_context.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_context.c b/drivers/gpu/drm/i915/gem/i915_gem_context.c
index 993faa213b41..d30260ffe2a7 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_context.c
@@ -230,7 +230,8 @@ static void intel_context_set_gem(struct intel_context *ce,
ce->timeline = intel_timeline_get(ctx->timeline);
if (ctx->sched.priority >= I915_PRIORITY_NORMAL &&
- intel_engine_has_timeslices(ce->engine))
+ intel_engine_has_timeslices(ce->engine) &&
+ intel_engine_has_semaphores(ce->engine))
__set_bit(CONTEXT_USE_SEMAPHORES, &ce->flags);
intel_context_set_watchdog_us(ce, ctx->watchdog.timeout_us);
@@ -1939,7 +1940,8 @@ static int __apply_priority(struct intel_context *ce, void *arg)
if (!intel_engine_has_timeslices(ce->engine))
return 0;
- if (ctx->sched.priority >= I915_PRIORITY_NORMAL)
+ if (ctx->sched.priority >= I915_PRIORITY_NORMAL &&
+ intel_engine_has_semaphores(ce->engine))
intel_context_set_use_semaphores(ce);
else
intel_context_clear_use_semaphores(ce);
