linux-kernel - Re: [PATCH 5.4 026/109] drm/sun4i: mixer: Call of_dma

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Date:   Wed, 15 Jul 2020 11:24:53 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Chen-Yu Tsai <wens@...nel.org>
Cc:     linux-kernel <linux-kernel@...r.kernel.org>,
        stable <stable@...r.kernel.org>,
        Paul Kocialkowski <paul.kocialkowski@...tlin.com>,
        Maxime Ripard <maxime@...no.tech>,
        Sasha Levin <sashal@...nel.org>
Subject: Re: [PATCH 5.4 026/109] drm/sun4i: mixer: Call of_dma_configure if
 theres an IOMMU

On Wed, Jul 15, 2020 at 10:22:13AM +0800, Chen-Yu Tsai wrote:
> Hi Greg,
> 
> On Wed, Jul 15, 2020 at 3:11 AM Greg Kroah-Hartman
> <gregkh@...uxfoundation.org> wrote:
> >
> > From: Maxime Ripard <maxime@...no.tech>
> >
> > [ Upstream commit 842ec61f4006a6477a9deaedd69131e9f46e4cb5 ]
> >
> > The main DRM device is actually a virtual device so it doesn't have the
> > iommus property, which is instead on the DMA masters, in this case the
> > mixers.
> 
> The iommu driver and DT changes were added in v5.8-rc1. IMO There is no
> point in backporting this patch to any stable kernel.

Now dropped from everywhere, thanks.

greg k-h