From mboxrd@z Thu Jan  1 00:00:00 1970
From: Thierry Reding <thierry.reding@gmail.com>
Subject: Re: [PATCH v1] drm/tegra: Detach devices from IOMMU DMA domain on
 arm32
Date: Wed, 26 Sep 2018 17:24:25 +0200
Message-ID: <20180926152425.GK12980@ulmo>
References: <20180819142421.22567-1-digetx@gmail.com>
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To: Dmitry Osipenko <digetx@gmail.com>
Cc: linux-tegra@vger.kernel.org, Mikko Perttunen <cyndis@kapsi.fi>, dri-devel@lists.freedesktop.org
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On Sun, Aug 19, 2018 at 05:24:20PM +0300, Dmitry Osipenko wrote:
> All Tegra DRM devices are getting attached to an implicit IOMMU DMA
> domain if CONFIG_ARM_DMA_USE_IOMMU=3Dy. Since Tegra DRM driver manages IO=
MMU
> by itself, the devices must be detached from the implicit domain using
> arch-specific IOMMU-API. Note that this works only for arm32 and not for
> arm64, which will remain broken if CONFIG_IOMMU_DMA is enabled.
>=20
> Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
> ---
>  drivers/gpu/drm/tegra/drm.c | 12 ++++++++++++
>  1 file changed, 12 insertions(+)

Applied, thanks.

Thierry

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