Quoting Daniele Ceraolo Spurio (2019-09-16 22:41:04)
> @@ -401,7 +407,10 @@ static void gen11_unlock_sfc(struct intel_engine_cs *engine)
> return;
> }
>
> - rmw_clear_fw(uncore, sfc_forced_lock, sfc_forced_lock_bit);
> + lock = intel_uncore_read_fw(uncore, sfc_forced_lock);
> + if (lock & sfc_forced_lock_bit)
> + intel_uncore_write_fw(uncore, sfc_forced_lock,
> + lock & ~sfc_forced_lock_bit);
This is handled by rmw_clear_fw() itself now,
80fa64d62067 ("drm/i915: Only apply a rmw mmio update if the value changes")
-Chris
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