[RFC 34/34] drm/xe: Enable D3Cold on 'low' VRAM utilization

[Rodrigo Vivi]

Now that we eliminated all the mem_access get/put with its
locking issues from the inner calls of migration, we can
allow D3Cold.

Enable it when VRAM utilization is lower then 300Mb. On
higher utilization we only allow D3hot so we don't increase
so much the latency on runtime resume due to the memory
restoration.

Signed-off-by: Rodrigo Vivi <rodrigo.vivi at intel.com>
---
 drivers/gpu/drm/xe/xe_pm.h | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/xe/xe_pm.h b/drivers/gpu/drm/xe/xe_pm.h
index 0ae4f6a60c6d..bc6bd2a01189 100644
--- a/drivers/gpu/drm/xe/xe_pm.h
+++ b/drivers/gpu/drm/xe/xe_pm.h
@@ -8,12 +8,7 @@
 
 #include <linux/pm_runtime.h>
 
-/*
- * TODO: Threshold = 0 will block D3Cold.
- *       Before we can move this to a higher value (like 300), we need to:
- *           1. rewrite the VRAM save / restore to avoid buffer object locks
- */
-#define DEFAULT_VRAM_THRESHOLD 0 /* in MB */
+#define DEFAULT_VRAM_THRESHOLD 300 /* in MB */
 
 struct xe_device;
 
-- 
2.43.0