[PATCH v2] drm/xe: Enlarge the invalidation timeout from 150 to 500

[Shuicheng Lin]

There are error messages like below that are occurring during stress testing:
"[   31.004009] xe 0000:03:00.0: [drm] ERROR GT0: Global invalidation timeout"
Changing the timeout value from 150 to 500 could help avoid these error messages
in the stress tests.

Due to the way xe_mmio_wait32() is implemented, the timeout is able to expire
early when the register matches the expected value due to the wait increments
starting small. So, the larger timeout value should have no effect during
normal use cases.

Signed-off-by: Shuicheng Lin <shuicheng.lin at intel.com>
Cc: Matthew Auld <matthew.auld at intel.com>
Cc: Nirmoy Das <nirmoy.das at intel.com>
Reviewed-by: Jonathan Cavitt <jonathan.cavitt at intel.com>
Tested-by: Zongyao Bai <zongyao.bai at intel.com>
---
 drivers/gpu/drm/xe/xe_device.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/xe/xe_device.c b/drivers/gpu/drm/xe/xe_device.c
index cd241a8e1838..60aebf7561ec 100644
--- a/drivers/gpu/drm/xe/xe_device.c
+++ b/drivers/gpu/drm/xe/xe_device.c
@@ -925,7 +925,7 @@ void xe_device_l2_flush(struct xe_device *xe)
 	spin_lock(&gt->global_invl_lock);
 	xe_mmio_write32(&gt->mmio, XE2_GLOBAL_INVAL, 0x1);
 
-	if (xe_mmio_wait32(&gt->mmio, XE2_GLOBAL_INVAL, 0x1, 0x0, 150, NULL, true))
+	if (xe_mmio_wait32(&gt->mmio, XE2_GLOBAL_INVAL, 0x1, 0x0, 500, NULL, true))
 		xe_gt_err_once(gt, "Global invalidation timeout\n");
 	spin_unlock(&gt->global_invl_lock);
 
-- 
2.25.1