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Date: Mon, 16 Oct 2017 17:41:10 +0800
From: icenowy@aosc.io
To: Maxime Ripard <maxime.ripard@free-electrons.com>
Cc: devicetree@vger.kernel.org, Chen-Yu Tsai <wens@csie.org>,
        linux-kernel@vger.kernel.org, linux-sunxi@googlegroups.com,
        Rob Herring <robh+dt@kernel.org>, linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 1/2] dt-bindings: add binding for A64 DE2 CCU with SRAM
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在 2017-10-16 17:11，Maxime Ripard 写道：
> On Sat, Oct 14, 2017 at 08:29:24PM +0800, Icenowy Zheng wrote:
>> A64's Display Engine 2.0 needs a section of SRAM (SRAM C) to be 
>> claimed.
> 
> Why?

Allwinner didn't document this, but if the SRAM is not claimed, the
DE2 MMIO zone is totally not accessible.

It seems that Allwinner uses the SRAM C in the DE2 internally.

> 
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