linux-kernel - Re: [PATCH 2/2] drm: add more MMU dependencies

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Date:   Wed, 11 Jan 2017 15:02:39 +0100
From:   Lucas Stach <l.stach@...gutronix.de>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Daniel Vetter <daniel.vetter@...ll.ch>,
        Rob Clark <robdclark@...il.com>,
        David Airlie <airlied@...ux.ie>, linux-arm-msm@...r.kernel.org,
        etnaviv@...ts.freedesktop.org,
        Christian Gmeiner <christian.gmeiner@...il.com>,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        Russell King <rmk+kernel@...linux.org.uk>,
        Benjamin Gaignard <benjamin.gaignard@...aro.org>,
        freedreno@...ts.freedesktop.org
Subject: Re: [PATCH 2/2] drm: add more MMU dependencies

Am Mittwoch, den 11.01.2017, 14:33 +0100 schrieb Arnd Bergmann:
> Many DRM drivers only work with an MMU, and after the patch to enable
> core DRM support without MMU, we already had one fixup for many of them.
> The etnaviv, armada and msm drivers were missed and have the same problem:
> 
> warning: (DRM_ETNAVIV) selects IOMMU_SUPPORT which has unmet direct dependencies (MMU)
> warning: (DRM_I915 && DRM_MSM && DRM_ETNAVIV) selects SHMEM which has unmet direct dependencies (MMU)
> drivers/gpu/drm/armada/armada_gem.o: In function `armada_gem_vm_fault':
> armada_gem.c:(.text.armada_gem_vm_fault+0x14): undefined reference to `vm_insert_pfn'
> arch/arm/mm/dma-mapping.c: In function '__iommu_alloc_remap':
> arch/arm/mm/dma-mapping.c:1390:4: error: 'VM_ARM_DMA_CONSISTENT' undeclared (first use in this function)
> arch/arm/mm/dma-mapping.c:1456:31: error: 'atomic_pool' undeclared (first use in this function); did you mean 'atomic_xor'?
> 
> Fixes: 011cda589938 ("drm: fix compilations issues introduced by "drm: allow to use mmuless SoC"")
> Fixes: 62a0d98a188c ("drm: allow to use mmuless SoC")
> Signed-off-by: Arnd Bergmann <arnd@...db.de>

Acked-by: Lucas Stach <l.stach@...gutronix.de>

> ---
>  drivers/gpu/drm/armada/Kconfig  | 2 +-
>  drivers/gpu/drm/etnaviv/Kconfig | 1 +
>  drivers/gpu/drm/msm/Kconfig     | 1 +
>  3 files changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/armada/Kconfig b/drivers/gpu/drm/armada/Kconfig
> index 15f3ecfb16f1..eafaeeb7b5b1 100644
> --- a/drivers/gpu/drm/armada/Kconfig
> +++ b/drivers/gpu/drm/armada/Kconfig
> @@ -1,6 +1,6 @@
>  config DRM_ARMADA
>  	tristate "DRM support for Marvell Armada SoCs"
> -	depends on DRM && HAVE_CLK && ARM
> +	depends on DRM && HAVE_CLK && ARM && MMU
>  	select DRM_KMS_HELPER
>  	help
>  	  Support the "LCD" controllers found on the Marvell Armada 510
> diff --git a/drivers/gpu/drm/etnaviv/Kconfig b/drivers/gpu/drm/etnaviv/Kconfig
> index 2cde7a5442fb..656c061b439d 100644
> --- a/drivers/gpu/drm/etnaviv/Kconfig
> +++ b/drivers/gpu/drm/etnaviv/Kconfig
> @@ -3,6 +3,7 @@ config DRM_ETNAVIV
>  	tristate "ETNAVIV (DRM support for Vivante GPU IP cores)"
>  	depends on DRM
>  	depends on ARCH_MXC || ARCH_DOVE
> +	depends on MMU
>  	select SHMEM
>  	select TMPFS
>  	select IOMMU_API
> diff --git a/drivers/gpu/drm/msm/Kconfig b/drivers/gpu/drm/msm/Kconfig
> index d96b2b6898a3..7f78da695dff 100644
> --- a/drivers/gpu/drm/msm/Kconfig
> +++ b/drivers/gpu/drm/msm/Kconfig
> @@ -4,6 +4,7 @@ config DRM_MSM
>  	depends on DRM
>  	depends on ARCH_QCOM || (ARM && COMPILE_TEST)
>  	depends on OF && COMMON_CLK
> +	depends on MMU
>  	select REGULATOR
>  	select DRM_KMS_HELPER
>  	select DRM_PANEL