commit 77af670a7698bbc4dc9fd8bbd553b33bfb16b68a
author Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se> Fri Nov 18 16:00:45 2016 +0100
committer Simon Horman <horms+renesas@verge.net.au> Tue Jan 03 10:43:59 2017 +0100
tree 48d7e5a893a74f1ed91685ffd6d0d096392cbb9c
parent 1682a9c5694d228041dc7ff59f49427c83920675

ARM: shmobile: defconfig: Enable CMA for DMA

To be able to use VIN with larger frame sizes CMA memory are needed for
DMA. If this is not enabled trying to capture large frames can result in
errors such as:

rcar-vin e6ef0000.video: dma_alloc_coherent of size 8388608 failed

A CMA area of 64MB are needed for v4l2-compliance to pass on all formats
on the largest possible frame size of 2048x2048.

Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm/configs/shmobile_defconfig

diff --git a/arch/arm/configs/shmobile_defconfig b/arch/arm/configs/shmobile_defconfig
index 98e9ce6..b66e17a 100644
--- a/arch/arm/configs/shmobile_defconfig
+++ b/arch/arm/configs/shmobile_defconfig
@@ -33,6 +33,7 @@
 CONFIG_NR_CPUS=8
 CONFIG_AEABI=y
 CONFIG_HIGHMEM=y
+CONFIG_CMA=y
 CONFIG_ZBOOT_ROM_TEXT=0x0
 CONFIG_ZBOOT_ROM_BSS=0x0
 CONFIG_ARM_APPENDED_DTB=y
@@ -58,6 +59,8 @@
 CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
 CONFIG_DEVTMPFS=y
 CONFIG_DEVTMPFS_MOUNT=y
+CONFIG_DMA_CMA=y
+CONFIG_CMA_SIZE_MBYTES=64
 CONFIG_SIMPLE_PM_BUS=y
 CONFIG_MTD=y
 CONFIG_MTD_BLOCK=y