Re: [PATCH 0/3] video/efi: Support FIRMWARE_EDID on non-x86

[Thomas Zimmermann]

Hi

Am 20.11.25 um 09:25 schrieb Ard Biesheuvel:
> On Thu, 20 Nov 2025 at 09:19, Thomas Zimmermann <tzimmermann@xxxxxxx> wrote:
> > Am 20.11.25 um 08:56 schrieb Thomas Zimmermann:
> > > Hi,
> > >
> > > thanks for addressing the remaining EDID support.
> > >
> > > First of all, you need to cc dri-devel@xxxxxxxxxxxxxxxxxxxxx  on any
> > > further revisions.
> > >
> > > Am 19.11.25 um 13:30 schrieb Ard Biesheuvel:
> > > > From: Ard Biesheuvel <ardb@xxxxxxxxxx>
> > > >
> > > > Refactor the screen_info handling so non-x86 platforms booting via the
> > > > EFI stub also have access to the EDID data exposed by the EFI boot
> > > > services.
> > > I don't like how this series complicates everything to make non-x86
> > > easier. But the general idea of using efi_screen_info goes into the
> > > right direction. It's just not generic enough.
> > >
> > > The sysfb code transfers struct screen_info as device parameter [1].
> > > Drivers later fetch it on probe [2].  The direct ref to the global
> > > edid_info [3] only exists because we have no means of transferring it
> > > as device data.
> > >
> > > So instead of using efi_screen_info, let's declare struct
> > > sysfb_display with screen_info and edid_info.  The header would be
> > > linux/sysfb.h.  We transfer this to all related drivers.  The generic
> > > EFI code would set it up like efi_screen_info and the x86 code would
> > > decalre it at [4]; replacing the existing state.
> > If this proposal works for EFI, I could do the changes in graphics
> > drivers and then resubmit the EDID series with an additional patch for
> > generic EFI.
> That sounds great, thanks.

Series is out at 
https://lore.kernel.org/dri-devel/20251121135624.494768-1-tzimmermann@xxxxxxx/ 
Once/if merged, we can implement EDID support on top of it for all of EFI.

Best regards
Thomas


--
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Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Frankenstr. 146, 90461 Nürnberg, Germany, www.suse.com
GF: Jochen Jaser, Andrew McDonald, Werner Knoblich, (HRB 36809, AG Nürnberg)