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From 65854b72066317cb2896df184794890c32f5f1bb Mon Sep 17 00:00:00 2001
From: Eric Anholt <eric@anholt.net>
Date: Fri, 23 Oct 2015 12:33:43 +0100
Subject: [PATCH 100/127] drm/vc4: Remove extra barrier()s aroudn CTnCA/CTnEA
setup.
The writel() that these expand to already does barriers.
Signed-off-by: Eric Anholt <eric@anholt.net>
---
drivers/gpu/drm/vc4/vc4_gem.c | 9 +++------
1 file changed, 3 insertions(+), 6 deletions(-)
--- a/drivers/gpu/drm/vc4/vc4_gem.c
+++ b/drivers/gpu/drm/vc4/vc4_gem.c
@@ -104,14 +104,11 @@ submit_cl(struct drm_device *dev, uint32
{
struct vc4_dev *vc4 = to_vc4_dev(dev);
- V3D_WRITE(V3D_CTNCA(thread), start);
- barrier();
-
- /* Set the end address of the control list. Writing this
- * register is what starts the job.
+ /* Set the current and end address of the control list.
+ * Writing the end register is what starts the job.
*/
+ V3D_WRITE(V3D_CTNCA(thread), start);
V3D_WRITE(V3D_CTNEA(thread), end);
- barrier();
}
int
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