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Date: Tue, 29 Mar 2016 14:13:26 +0100
Message-ID: <CACvgo50REvRxN2_qdw=2NeTTSgjpA+9c8OZgPE0q19meH6ArKA@mail.gmail.com>
Subject: Re: [RFC PATCH v1 0/4] Add Rockchip RGA support
From: Emil Velikov <emil.l.velikov@gmail.com>
To: =?UTF-8?Q?Heiko_St=C3=BCbner?= <heiko@sntech.de>
Cc: Yakir Yang <ykk@rock-chips.com>, David Airlie <airlied@linux.ie>,
        Mark Yao <mark.yao@rock-chips.com>,
        Joonyoung Shim <jy0922.shim@samsung.com>,
        Kumar Gala <galak@codeaurora.org>,
        Ian Campbell <ijc+devicetree@hellion.org.uk>,
        Rob Herring <robh+dt@kernel.org>, Pawel Moll <pawel.moll@arm.com>,
        Russell King <linux@arm.linux.org.uk>,
        devicetree <devicetree@vger.kernel.org>,
        "Linux-Kernel@Vger. Kernel. Org" <linux-kernel@vger.kernel.org>,
        ML dri-devel <dri-devel@lists.freedesktop.org>,
        linux-rockchip <linux-rockchip@lists.infradead.org>,
        LAKML <linux-arm-kernel@lists.infradead.org>
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On 28 March 2016 at 23:13, Heiko Stübner <heiko@sntech.de> wrote:

> I have the feeling we're going quite a bit off-topic right now :-) .
> The binary-driver-crazyness, hasn't really anything to do with Yakir's support
> for the RGA (which is about raster-graphics-acceleration, so 2d stuff).
>
> And me mentioning the armsoc-ddx was merely a means to allow some sort of
> different userspace user, as requested in your original mail ;-) .
>
Seems like I forgot to state the obvious - for all the reasons
mentioned, the armsoc ddx seems like a bad example.

> Maybe you know a better use-case on where to demonstrate the viability of the
> userspace API for it as originally requested.
I'm afraid that my RockChip-foo is extremely limited. Perhaps the
actual user of these should be mentioned ? xf86-video-rockhip (is
there one ?) or any other effort/project that lacks some (all?) of the
criticism listed.

(Sort of) the bottom line - either reuse the existing interfaces or
provide an approved, full blown userspace (libdrm demos/programs do
not count) that uses the new interfaces.

I haven't made these rules, just a fool^Wguy that repeats them so that
people don't abuse them much. If in doubt check with Dave and Daniel V
- they had enough repeating these.

-Emil