linux-kernel - Re: [PATCH 3/7] bus: add bus driver for accessing Allwinner A64 DE2

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Message-ID: <CAGb2v64-sWsFfHThVrcE5ivrf6kZSZa_tkB_GtC=Z+1TLpWV_Q@mail.gmail.com>
Date:   Sat, 14 Apr 2018 18:30:30 +0800
From:   Chen-Yu Tsai <wens@...e.org>
To:     Jagan Teki <jagan@...rulasolutions.com>
Cc:     Icenowy Zheng <icenowy@...c.io>, Rob Herring <robh+dt@...nel.org>,
        Maxime Ripard <maxime.ripard@...tlin.com>,
        devicetree <devicetree@...r.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        linux-clk <linux-clk@...r.kernel.org>,
        linux-sunxi <linux-sunxi@...glegroups.com>
Subject: Re: [PATCH 3/7] bus: add bus driver for accessing Allwinner A64 DE2

On Sat, Apr 14, 2018 at 6:25 PM, Jagan Teki <jagan@...rulasolutions.com> wrote:
> On Fri, Mar 16, 2018 at 11:23 PM, Icenowy Zheng <icenowy@...c.io> wrote:
>> The "Display Engine 2.0" (usually called DE2) on the Allwinner A64 SoC
>> is different from the ones on other Allwinner SoCs. It requires a SRAM
>> region to be claimed, otherwise all DE2 subblocks won't be accessible.
>>
>> Add a bus driver for the Allwinner A64 DE2 part which claims the SRAM
>> region when probing.
>
> Along with this bus driver, we also need
> drivers/gpu/drm/sun4i/sun4i_drv.c which can usually drive the
> pipelines like mixer0 and 1 are the cases for A64?

I imagine that's the next part to be sent out, after the hardware
representation in the device tree has been decided on.

ChenYu