linux-kernel - Re: Regression in ARM CLCD Fb

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Message-ID: <CACRpkdYATL3CvQjyAY9y+d9SapK71gjwGhNrvEph_-n3mzbkMw@mail.gmail.com>
Date:   Wed, 19 Oct 2016 21:06:03 +0200
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Amit Pundir <amit.pundir@...aro.org>
Cc:     Pawel Moll <pawel.moll@....com>, Rob Herring <robh@...nel.org>,
        Russell King <linux@....linux.org.uk>,
        Tomi Valkeinen <tomi.valkeinen@...com>,
        John Stultz <john.stultz@...aro.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: Regression in ARM CLCD Fb

On Sat, Oct 15, 2016 at 6:44 PM, Amit Pundir <amit.pundir@...aro.org> wrote:

> Commit 25348160e9a4 ("video: ARM CLCD: add special panel hook for
> Versatiles") broke CLCD framebuffer on my qemu-system-arm +
> vexpress-v2p-ca9.dtb + Android test setup.

OMG I have to fix that, sorry.

Can you tell me how you invoke qemu?

> Android boot failed with:
>
> E/SurfaceFlinger( 1003): ERROR: failed to open framebuffer (No such
> file or directory), aborting
>
> It means Android didn't find /dev/fb* or equivalent /dev/graphics/fb*.
>
> Any thoughts on what might be going wrong here? Or am I missing
> anything obvious in my Qemu setup, though it was working fine so far.
> I'd be happy to help debug things.

Probably not, I guess it's my screwup and relates to machines
without the special CLCD control registers.

I just need to reproduce it and I will fix.

Yours,
Linus Walleij