[Intel-gfx] [PATCH 4/5] drm/i915/guc: Increase wait timeout for doorbell release status update

[Sagar Arun Kamble]

Current wait timeout of 10us is very tight as seen on SKL/KBL randomly
for pm_rpm at basic-pci-d3-state. Increase it to 50us.

Signed-off-by: Sagar Arun Kamble <sagar.a.kamble at intel.com>
Cc: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Michał Winiarski <michal.winiarski at intel.com>
Cc: Michel Thierry <michel.thierry at intel.com>
Cc: Michal Wajdeczko <michal.wajdeczko at intel.com>
Cc: Arkadiusz Hiler <arkadiusz.hiler at intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>
---
 drivers/gpu/drm/i915/i915_guc_submission.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/i915_guc_submission.c b/drivers/gpu/drm/i915/i915_guc_submission.c
index 21f7fa7..3914415 100644
--- a/drivers/gpu/drm/i915/i915_guc_submission.c
+++ b/drivers/gpu/drm/i915/i915_guc_submission.c
@@ -222,7 +222,8 @@ static int __destroy_doorbell(struct i915_guc_client *client, bool notify_guc)
 	/* Doorbell release flow requires that we wait for GEN8_DRB_VALID bit
 	 * to go to zero after updating db_status before we call the GuC to
 	 * release the doorbell */
-	if (wait_for_us(!(I915_READ(GEN8_DRBREGL(db_id)) & GEN8_DRB_VALID), 10))
+	if (wait_for_us(!(I915_READ(GEN8_DRBREGL(db_id)) & GEN8_DRB_VALID),
+			50))
 		WARN_ONCE(true, "Doorbell never became invalid after disable\n");
 
 	if (notify_guc)
-- 
1.9.1