From: Philipp Zabel <p.zabel@pengutronix.de>
Date: Wed, 25 Mar 2015 16:45:09 +0000 (-0300)
Subject: [media] coda: drop dma_sync_single_for_device in coda_bitstream_queue
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=8191919bff678ae16050c60e1f86355d7731ac73;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

[media] coda: drop dma_sync_single_for_device in coda_bitstream_queue

Issuing a cache flush for the whole bitstream buffer is not optimal in the first
place when only a part of it was written. But given that the buffer is mapped in
writecombine mode, it is not needed at all.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Tested-by: Ian Molton <imolton@ad-holdings.co.uk>
Signed-off-by: Kamil Debski <k.debski@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
---

diff --git a/drivers/media/platform/coda/coda-bit.c b/drivers/media/platform/coda/coda-bit.c
index d39789d59d17..d336cb66b42b 100644
--- a/drivers/media/platform/coda/coda-bit.c
+++ b/drivers/media/platform/coda/coda-bit.c
@@ -181,10 +181,6 @@ static int coda_bitstream_queue(struct coda_ctx *ctx,
 	if (n < src_size)
 		return -ENOSPC;
 
-	dma_sync_single_for_device(&ctx->dev->plat_dev->dev,
-				   ctx->bitstream.paddr, ctx->bitstream.size,
-				   DMA_TO_DEVICE);
-
 	src_buf->v4l2_buf.sequence = ctx->qsequence++;
 
 	return 0;