Re: [PATCH v3 0/7] Boot logo supplied by the device tree

[Francesco Valla <francesco@valla.it>]

Hi Màxim,

On Fri, Sep 25, 2026 at 10:48:31AM +0200, Màxim Pedraza Padilla wrote:
> Hi Thomas,
> 
> > the whole Linux logo on the console is somewhat gimmicky and IMHO should
> > not be further extended. Also fbdev as a whole has realistically run its
> > course. We fix bugs and occasionally clean up the code, but it is
> > questionable whether new feature make much sense. Even more so as the
> > drivers your system uses appear to be DRM ones.
> 
> They are, it is tilcdc. Understood, I will drop the fbdev side, which
> also settles your comment on patch 1.
> 
> > There is a proposal for a DRM splash screen at [1]. It retrieves the
> > device vendor's logo from the firmware and displays it at the given
> > coordinates. IMHO you should start with this series and add DT support
> > there.
> 
> Agreed. I have been following Francesco's series since Sam pointed me
> at it, and it is where the DRM follow-up I mentioned in the cover letter
> belongs, rather than in a client of my own.
> 
> A device tree source fits next to the BGRT one. The BGRT is the firmware
> handing the kernel an image and where to put it, and a DT system has no
> such table. The BMP loaded as firmware only helps if the file is built
> into the kernel, or if a filesystem is already there when the display
> comes up. With U-Boot's Falcon mode, the device tree is the only thing
> that reaches the kernel.
> 
> So the plan would be a node under /chosen carrying a BMP, either in the
> node itself or in a reserved memory region the bootloader loaded it
> into, with the placement properties from this series. The region is the
> same memremap() the BGRT source already does, only with the address
> coming from the device tree.
> 
> Rotation too: the client skips a BGRT image with the orientation bits
> set today, and it could turn it instead. I will ask Rob separately how
> he wants the image described, since that is what the binding hinges on.
> 
> Francesco, is a v4 on the way? Would you take a DT source as patches on
> top of your series, or would you rather I wait until it lands?
> 

v4 is planned but has been preempted by other activities - I am not able
to give you an ETA at the moment. If you have capacity, feel free to
take over.

> Max
> 

Regards,
Francesco