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 <20180416225259.6571-1-eric@anholt.net>
From:   Rob Herring <robh+dt@kernel.org>
Date:   Tue, 17 Apr 2018 08:09:06 -0500
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Subject: Re: [PATCH v3 1/3] drm/vc4: Remove the need for the GPU-subsystem DT node.
To:     Eric Anholt <eric@anholt.net>
Cc:     dri-devel <dri-devel@lists.freedesktop.org>,
        Mark Rutland <mark.rutland@arm.com>,
        Ray Jui <rjui@broadcom.com>,
        Scott Branden <sbranden@broadcom.com>,
        Jon Mason <jonmason@broadcom.com>,
        bcm-kernel-feedback-list@broadcom.com,
        Florian Fainelli <f.fainelli@gmail.com>,
        "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" 
        <linux-arm-kernel@lists.infradead.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        devicetree@vger.kernel.org, Stefan Wahren <stefan.wahren@i2se.com>,
        "moderated list:BROADCOM BCM2835 ARM ARCHITECTURE" 
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On Mon, Apr 16, 2018 at 5:52 PM, Eric Anholt <eric@anholt.net> wrote:
> 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.
>
> v2: Simplify the DT walking code.
> v3: Always put the node.
>
> Signed-off-by: Eric Anholt <eric@anholt.net>
> ---
>  .../bindings/display/brcm,bcm-vc4.txt         |  7 -----
>  drivers/gpu/drm/vc4/vc4_drv.c                 | 28 +++++++++++++------
>  drivers/gpu/drm/vc4/vc4_hvs.c                 |  1 +
>  drivers/gpu/drm/vc4/vc4_v3d.c                 |  1 +
>  4 files changed, 22 insertions(+), 15 deletions(-)

Reviewed-by: Rob Herring <robh@kernel.org>