[PATCH v3 0/7] Add FIT multi-DTB selection for Qualcomm platforms

[Sumit Garg]

Hi Jan,

On Fri, Apr 17, 2026 at 02:15:43PM +0200, Jan Kiszka wrote:
> On 17.04.26 14:09, Aswin Murugan wrote:
> > This series adds dynamic device tree selection from FIT images for
> > Qualcomm Snapdragon platforms, enabling U-Boot to select the
> > appropriate DTB based on hardware parameters detected from SMEM.
> > 
> > Qualcomm fit based DTB format is documented in [1]
> > The fit image contains only DTB, while the kernel will be part of UKI image.
> > 
> 
> I suppose you know that UKIs (systemd-boot, EFI Boot Guard) provide DTB
> selection as well. However, that is a fix-up for the case the firmware
> does not provide a fitting DTB. This here is supposed to support the
> firmware DTB delivery, correct?
>

I would say instead that it's an alternate way to bundle multiple DTBs
in a specific DT partition which are used by firmware to select
appropriate DTB for the board the firmware is running on.

The source of this DTBs are from kernel only where the OEM has to take
care of 1:1 compatibility among kernel and DTB. This approach has been
deployed for Yocto and Android based systems but I do agree with general
purpose distros bundling DTBs in UKIs is surely an alternative option.

-Sumit