linux-kernel - Re: [RFC 08/14] bootsplash: Add file reading and picture rendering

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Date:   Wed, 25 Oct 2017 22:27:27 +0200
From:   Takashi Iwai <tiwai@...e.de>
To:     "Randy Dunlap" <rdunlap@...radead.org>
Cc:     <b.zolnierkie@...sung.com>, "Max Staudt" <mstaudt@...e.de>,
        <linux-fbdev@...r.kernel.org>, <michal@...kovi.net>,
        "Michal Srb" <MSrb@...e.com>, "Oliver Neukum" <ONeukum@...e.com>,
        "Stefan Dirsch" <sndirsch@...e.com>, <linux-kernel@...r.kernel.org>
Subject: Re: [RFC 08/14] bootsplash: Add file reading and picture rendering

On Wed, 25 Oct 2017 19:32:53 +0200,
Randy Dunlap wrote:
> 
> On 10/25/17 05:45, Max Staudt wrote:
> 
> > diff --git a/drivers/video/console/Kconfig b/drivers/video/console/Kconfig
> > index a6617c07229a..c3496c5ac2bb 100644
> > --- a/drivers/video/console/Kconfig
> > +++ b/drivers/video/console/Kconfig
> > @@ -175,6 +175,14 @@ config BOOTSPLASH
> >            If unsure, say N.
> >            This is typically used by distributors and system integrators.
> >  
> > +config BOOTSPLASH_FILE
> > +        string "Default full path to bootsplash file"
> > +        depends on BOOTSPLASH
> > +        default "/bootsplash"
> > +        help
> > +          This file will be looked for in the initramfs and, if found, loaded
> > +          and used as a bootsplash.
> 
> 
> Some people try to avoid using initramfs.
> 
> Can one have a bootsplash without initramfs?

The current code is apparently not capable, but it shouldn't be too
difficult to re-use the built-in firmware.  i.e. essentially copying
fw_get_builtin_firmware() in drivers/base/firmware_class.c.

Also the bootsplash can appear after mounting the rootfs, too.  Before
that, it's simply a blank screen.  So it's not entirely useless even
without initrd / initramfs.


thanks,

Takashi