diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.4/0100-drm-vc4-Remove-extra-barrier-s-aroudn-CTnCA-CTnEA-se.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.4/0100-drm-vc4-Remove-extra-barrier-s-aroudn-CTnCA-CTnEA-se.patch | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.4/0100-drm-vc4-Remove-extra-barrier-s-aroudn-CTnCA-CTnEA-se.patch b/target/linux/brcm2708/patches-4.4/0100-drm-vc4-Remove-extra-barrier-s-aroudn-CTnCA-CTnEA-se.patch new file mode 100644 index 0000000000..0ea1ee7234 --- /dev/null +++ b/target/linux/brcm2708/patches-4.4/0100-drm-vc4-Remove-extra-barrier-s-aroudn-CTnCA-CTnEA-se.patch @@ -0,0 +1,33 @@ +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 |