1 From 7ab57c24a8c094163c2a5da180edbba0c45b5765 Mon Sep 17 00:00:00 2001
2 From: Eric Anholt <eric@anholt.net>
3 Date: Fri, 23 Oct 2015 12:33:43 +0100
4 Subject: [PATCH] drm/vc4: Remove extra barrier()s aroudn CTnCA/CTnEA setup.
6 The writel() that these expand to already does barriers.
8 Signed-off-by: Eric Anholt <eric@anholt.net>
10 drivers/gpu/drm/vc4/vc4_gem.c | 9 +++------
11 1 file changed, 3 insertions(+), 6 deletions(-)
13 --- a/drivers/gpu/drm/vc4/vc4_gem.c
14 +++ b/drivers/gpu/drm/vc4/vc4_gem.c
15 @@ -104,14 +104,11 @@ submit_cl(struct drm_device *dev, uint32
17 struct vc4_dev *vc4 = to_vc4_dev(dev);
19 - V3D_WRITE(V3D_CTNCA(thread), start);
22 - /* Set the end address of the control list. Writing this
23 - * register is what starts the job.
24 + /* Set the current and end address of the control list.
25 + * Writing the end register is what starts the job.
27 + V3D_WRITE(V3D_CTNCA(thread), start);
28 V3D_WRITE(V3D_CTNEA(thread), end);