linux-kernel - Re: [RFC PATCH 0/4] Allow to use DRM fbdev emulation layer with CONFIG

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Date:   Thu, 9 Sep 2021 17:52:40 +0200
From:   Noralf Trønnes <noralf@...nnes.org>
To:     sam@...nborg.org
Cc:     airlied@...ux.ie, bp@...en8.de, dri-devel@...ts.freedesktop.org,
        gregkh@...uxfoundation.org, hdegoede@...hat.com, hpa@...or.com,
        javierm@...hat.com, linux-fbdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, maarten.lankhorst@...ux.intel.com,
        mingo@...hat.com, mripard@...nel.org, pbrobinson@...il.com,
        tglx@...utronix.de, tzimmermann@...e.de, x86@...nel.org
Subject: Re: [RFC PATCH 0/4] Allow to use DRM fbdev emulation layer with
 CONFIG_FB disabled


> Hi Daniel,
>
> >
> > I think for a substantial improvement here in robustness what you really
> > want is
> > - kmscon in userspace
> > - disable FB layer
> > - ideally also disable console/vt layer in the kernel
> > - have a minimal emergency/boot-up log thing in drm, patches for that
> >   floated around a few times
>
> I assume you refer to this work by David Herrmann:
> "[RFC] drm: add kernel-log renderer"
> https://lists.freedesktop.org/archives/dri-devel/2014-March/055136.html
>

There's also this:

[PATCH v2 0/3] drm: Add panic handling
https://lore.kernel.org/dri-devel/20190311174218.51899-1-noralf@tronnes.org/

Noralf.