From: Mika Kuoppala <mika.kuoppala@xxxxxxxxxxxxxxx>
Avoid possible cs hang with semaphores by disabling lite restore.
References: 921f0c47f228 ("drm/i915: Revert "drm/i915/tgl: Wa_1607138340"")
Signed-off-by: Mika Kuoppala <mika.kuoppala@xxxxxxxxxxxxxxx>
Cc: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
Cc: Tony Ye <tony.ye@xxxxxxxxx>
Cc: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
---
Let's give this another spin. The hangs are still occuring on tgl-b0.
---
drivers/gpu/drm/i915/gt/intel_lrc.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/gpu/drm/i915/gt/intel_lrc.c b/drivers/gpu/drm/i915/gt/intel_lrc.c
index f1067806e8d8..80dae2f298ba 100644
--- a/drivers/gpu/drm/i915/gt/intel_lrc.c
+++ b/drivers/gpu/drm/i915/gt/intel_lrc.c
@@ -1504,6 +1504,10 @@ static u64 execlists_update_context(struct i915_request *rq)
*/
wmb();
+ /* Wa_1607138340:tgl */
+ if (IS_TGL_REVID(rq->engine->i915, TGL_REVID_A0, TGL_REVID_B0))
+ desc |= CTX_DESC_FORCE_RESTORE;
+
ce->lrc.desc &= ~CTX_DESC_FORCE_RESTORE;
return desc;
}
--
2.20.1
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