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Date:   Mon, 17 May 2021 11:27:05 +0200
From:   Joerg Roedel <joro@8bytes.org>
To:     Kevin Tang <kevin3.tang@gmail.com>
Cc:     Maxime Ripard <maxime@cerno.tech>,
        Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
        Sean Paul <sean@poorly.run>, David Airlie <airlied@linux.ie>,
        Daniel Vetter <daniel@ffwll.ch>,
        Rob Herring <robh+dt@kernel.org>,
        Mark Rutland <mark.rutland@arm.com>,
        Orson Zhai <orsonzhai@gmail.com>,
        Chunyan Zhang <zhang.lyra@gmail.com>,
        "Linux-Kernel@Vger. Kernel. Org" <linux-kernel@vger.kernel.org>,
        ML dri-devel <dri-devel@lists.freedesktop.org>,
        devicetree@vger.kernel.org, Robin Murphy <robin.murphy@arm.com>
Subject: Re: [PATCH v5 4/6] drm/sprd: add Unisoc's drm display controller
 driver
Message-ID: <YKI26bZGAA+ZNLLj@8bytes.org>
References: <20210425123607.26537-1-kevin3.tang@gmail.com>
 <20210425123607.26537-5-kevin3.tang@gmail.com>
 <20210430092249.n75to2das5m6p4zb@gilmour>
 <CAFPSGXYJxWJDo1cz+kJB8J9YayGx1hYa=04K5OJ3DHh9ifbuRQ@mail.gmail.com>
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On Fri, Apr 30, 2021 at 08:20:10PM +0800, Kevin Tang wrote:
> Cc  Robin & Joerg

This is just some GPU internal MMU being used here, it seems. It doesn't
use the IOMMU core code, so no Ack needed from the IOMMU side.

Regards,

	Joerg