linux-kernel - Re: [PATCH] arm64: dts: mt8183: Add node for the Mali GPU

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Message-ID: <20190919123243.GA3457@kevin>
Date:   Thu, 19 Sep 2019 08:32:43 -0400
From:   Alyssa Rosenzweig <alyssa.rosenzweig@...labora.com>
To:     Nicolas Boichat <drinkcat@...omium.org>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Mark Rutland <mark.rutland@....com>,
        devicetree@...r.kernel.org,
        "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" 
        <linux-arm-kernel@...ts.infradead.org>,
        "moderated list:ARM/Mediatek SoC support" 
        <linux-mediatek@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Nick Fan <nick.fan@...iatek.com>,
        Boris Brezillon <boris.brezillon@...labora.com>,
        Douglas Anderson <dianders@...omium.org>,
        Dominik Behr <dbehr@...omium.org>,
        Steven Price <steven.price@....com>
Subject: Re: [PATCH] arm64: dts: mt8183: Add node for the Mali GPU

> > By the time MT8183 shows up in more concrete devices, it will, certainly
> > in kernel-space and likely in userspace as well. At present, the DDK can
> > be modified to run on top of the in-tree Mali drivers, i.e. "Bifrost on
> > mainline linux-next (+ page table/compatible patches), with blob
> > userspace".
> >
> > While the open userspace isn't ready here quite yet, I would definitely
> > encourage upstream kernel for ChromeOS, since then there's no need to
> > maintain the out-of-tree GPU driver.
> 
> That's an interesting idea, I had no idea, thanks for the info!
> 
> Would that work with midgard as well? We have released hardware with
> RK3288/3399, so it might be nice to experiment with these first.

Yes, the above would work with Midgard as well with no changes needed.
Ping Steven about thtat (CC'd).

> > More immediately, per Rob's review, it's important that the bindings
> > accepted upstream work with the in-tree Bifrost driver. Conceptually,
> > once Mesa supports Bifrost, if I install Debian on a MT8183 board,
> > everything should just work. I shouldn't need MT-specific changes / need
> > to change names for the DT. Regardless of which kernel driver you end up
> > using, minimally sharing the DT is good for everyone :-)
> 
> Yes. I'll try to dig further with MTK, but this may take some time.

Thank you!

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