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From:   Eric Anholt <eric@anholt.net>
To:     Stefan Wahren <stefan.wahren@i2se.com>,
        Rob Herring <robh+dt@kernel.org>,
        bcm-kernel-feedback-list@broadcom.com, devicetree@vger.kernel.org,
        linux-kernel@vger.kernel.org, Ray Jui <rjui@broadcom.com>,
        Scott Branden <sbranden@broadcom.com>,
        Florian Fainelli <f.fainelli@gmail.com>,
        linux-rpi-kernel@lists.infradead.org,
        Mark Rutland <mark.rutland@arm.com>,
        Jon Mason <jonmason@broadcom.com>,
        dri-devel@lists.freedesktop.org,
        linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 1/3] drm/vc4: Remove the need for the GPU-subsystem DT node.
In-Reply-To: <8806871.109949.1523384893773@email.1und1.de>
References: <20180409230040.1100-1-eric@anholt.net> <8806871.109949.1523384893773@email.1und1.de>
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Date:   Tue, 10 Apr 2018 12:39:22 -0700
Message-ID: <87efjmq2ad.fsf@anholt.net>
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Stefan Wahren <stefan.wahren@i2se.com> writes:

> Hi Eric,
>
>> Eric Anholt <eric@anholt.net> hat am 10. April 2018 um 01:00 geschrieben:
>>=20
>>=20
>> The GPU subsystem node was a workaround to have a central device to
>> bind V3D and display to.  Following the lead of 246774d17fc0
>> ("drm/etnaviv: remove the need for a gpu-subsystem DT node"), remove
>> the subsystem node usage and just create a platform device for the DRM
>> device to attach to if any of the subsystem devices are present.
>
> i didn't test it. Does the code change keep the backward compatibility wi=
th older DT?

Yes.

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