[PATCH] drm/etnaviv: select CMA and DMA_CMA if available

[Joshua Clayton]

On Friday, July 14, 2017 7:38:01 AM PDT Lucas Stach wrote:
> While this is no build dependency, etnaviv will only work correctly on most
> systems if CMA and DMA_CMA are enabled. Select both options if available to
> avoid users ending up with a non-working GPU due to a lacking kernel config.
> 
> Signed-off-by: Lucas Stach <l.stach at pengutronix.de>
> ---
>  drivers/gpu/drm/etnaviv/Kconfig | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/gpu/drm/etnaviv/Kconfig
> b/drivers/gpu/drm/etnaviv/Kconfig index 71cee4e9fefb..38b477b5fbf9 100644
> --- a/drivers/gpu/drm/etnaviv/Kconfig
> +++ b/drivers/gpu/drm/etnaviv/Kconfig
> @@ -10,6 +10,8 @@ config DRM_ETNAVIV
>  	select IOMMU_API
>  	select IOMMU_SUPPORT
>  	select WANT_DEV_COREDUMP
> +	select CMA if HAVE_DMA_CONTIGUOUS
> +	select DMA_CMA if HAVE_DMA_CONTIGUOUS
>  	help
>  	  DRM driver for Vivante GPUs.
IIRC, This at least half solves it.
Does the user of systems with > 2 GiB  need to explicitly specify cma size for 
it to work?