linux-kernel - Re: [PATCH -next] drm/vc4: Add dependency on HAVE_DMA_ATTRS, and select DRM_GEM_CMA

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Date:	Mon, 02 Nov 2015 15:43:17 -0800
From:	Eric Anholt <eric@...olt.net>
To:	Guenter Roeck <linux@...ck-us.net>, David Airlie <airlied@...ux.ie>
Cc:	dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
	Guenter Roeck <linux@...ck-us.net>
Subject: Re: [PATCH -next] drm/vc4: Add dependency on HAVE_DMA_ATTRS, and select DRM_GEM_CMA_HELPER

Guenter Roeck <linux@...ck-us.net> writes:

> Avoid the following build errors, seen with m68k:allmodconfig and other
> architectures which do not support HAVE_DMA_ATTRS.
>
> ERROR: "drm_gem_cma_create" [drivers/gpu/drm/vc4/vc4.ko] undefined!
> ERROR: "drm_gem_cma_prime_mmap" [drivers/gpu/drm/vc4/vc4.ko] undefined!
> ERROR: "drm_gem_cma_prime_get_sg_table" [drivers/gpu/drm/vc4/vc4.ko] undefined!
> ERROR: "drm_gem_cma_vm_ops" [drivers/gpu/drm/vc4/vc4.ko] undefined!
> ERROR: "drm_gem_cma_mmap" [drivers/gpu/drm/vc4/vc4.ko] undefined!
> ERROR: "drm_gem_cma_prime_vunmap" [drivers/gpu/drm/vc4/vc4.ko] undefined!
> ERROR: "drm_gem_cma_prime_import_sg_table" [drivers/gpu/drm/vc4/vc4.ko] undefined!
> ERROR: "drm_gem_cma_free_object" [drivers/gpu/drm/vc4/vc4.ko] undefined!
> ERROR: "drm_gem_cma_prime_vmap" [drivers/gpu/drm/vc4/vc4.ko] undefined!
> ERROR: "drm_gem_cma_dumb_map_offset" [drivers/gpu/drm/vc4/vc4.ko] undefined!
> ERROR: "drm_gem_cma_create" [drivers/gpu/drm/drm_kms_helper.ko] undefined!
> ERROR: "drm_gem_cma_describe" [drivers/gpu/drm/drm_kms_helper.ko] undefined!
> ERROR: "drm_gem_cma_free_object" [drivers/gpu/drm/drm_kms_helper.ko] undefined!
>
> Cc: Eric Anholt <eric@...olt.net>
> Fixes: c8b75bca92cb ("drm/vc4: Add KMS support for Raspberry Pi.")
> Signed-off-by: Guenter Roeck <linux@...ck-us.net>

Thanks for figuring out the Kconfig for this!

Acked-by: Eric Anholt <eric@...olt.net>

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