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As usual these patches were extracted from the raspberry pi repo: https://github.com/raspberrypi/linux/tree/rpi-4.4.y Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
34 lines
983 B
Diff
34 lines
983 B
Diff
From 7c5a9af8ff8784fa03e51c1db9c00d846edc7cdd Mon Sep 17 00:00:00 2001
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From: Eric Anholt <eric@anholt.net>
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Date: Fri, 23 Oct 2015 12:33:43 +0100
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Subject: [PATCH 099/304] drm/vc4: Remove extra barrier()s aroudn CTnCA/CTnEA
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setup.
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The writel() that these expand to already does barriers.
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Signed-off-by: Eric Anholt <eric@anholt.net>
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---
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drivers/gpu/drm/vc4/vc4_gem.c | 9 +++------
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1 file changed, 3 insertions(+), 6 deletions(-)
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--- a/drivers/gpu/drm/vc4/vc4_gem.c
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+++ b/drivers/gpu/drm/vc4/vc4_gem.c
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@@ -104,14 +104,11 @@ submit_cl(struct drm_device *dev, uint32
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{
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struct vc4_dev *vc4 = to_vc4_dev(dev);
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- V3D_WRITE(V3D_CTNCA(thread), start);
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- barrier();
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-
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- /* Set the end address of the control list. Writing this
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- * register is what starts the job.
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+ /* Set the current and end address of the control list.
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+ * Writing the end register is what starts the job.
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*/
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+ V3D_WRITE(V3D_CTNCA(thread), start);
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V3D_WRITE(V3D_CTNEA(thread), end);
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- barrier();
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}
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int
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