[PATCH v2] ARM: exynos_defconfig: increase CONFIG_CMA_SIZE_MBYTES to 96
krzk at kernel.org
Tue Mar 7 11:03:17 PST 2017
On Tue, Feb 28, 2017 at 12:12:21PM -0700, Shuah Khan wrote:
> Current CMA size of 64 Mbytes is right on the edge of being small when
> several drivers need to allocate large CMA buffers.
> For example, if the s5p-mfc driver needs to pre-allocate N MiB CMA memory
> to decode a H.264 1080p video, then there won't be enough CMA memory left
> for other drivers, such as the exynos-drm driver that may need to allocate
> GEM buffers for the display manager.
> Increasing CMA size to 96 Mbytes in exynos_defconfig addresses use-cases
> such as these.
> Suggested-by: Marek Szyprowski <m.szyprowski at samsung.com>
> Signed-off-by: Shuah Khan <shuahkh at osg.samsung.com>
> Reviewed-by: Javier Martinez Canillas <javier at osg.samsung.com>
> Changes since v1:
> Fix short and long commit log.
> Reason for this patch:
> With the proposed s5p_mfc patch series that pre-allocate buffers, when
> display manager starts, it fails to get GEM buffers. Increasing the CMA
> size to 96 solved the problem.
> arch/arm/configs/exynos_defconfig | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
Thanks, applied with slightly changed commit msg.
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