[PATCH v2 2/9] doc: board/qualcomm: Update RDP build instructions

[Varadarajan Narayanan]

On Mon, Apr 20, 2026 at 06:55:25PM +0530, Sumit Garg wrote:
> Adding Michael
>
> On Fri, Apr 10, 2026 at 02:41:47PM +0530, Varadarajan Narayanan wrote:
> > Add details about the SPL & U-Boot proper build steps, converting to
> > flashable images, source URLs for the needed binaries and scripts.
> >
> > Signed-off-by: Varadarajan Narayanan <varadarajan.narayanan at oss.qualcomm.com>
> > ---
> >  doc/board/qualcomm/rdp.rst | 69 ++++++++++++++++++++++++++++++++++++++
> >  1 file changed, 69 insertions(+)
> >
> > diff --git a/doc/board/qualcomm/rdp.rst b/doc/board/qualcomm/rdp.rst
> > index 99cf8eba57c..d09dba52044 100644
> > --- a/doc/board/qualcomm/rdp.rst
> > +++ b/doc/board/qualcomm/rdp.rst
> > @@ -42,6 +42,67 @@ on your device with::
> >
> >  U-Boot should be running after a reboot (``reset``).
> >
> > +Build steps for IPQ5210 based Qualcomm Dragonwing F8 & N8 Platforms:
> > +====================================================================
>
> Rather than just the build steps, please describe the overall boot flow.
> And since you have created a common SPL file for all the Qcom platforms,
> can you ellaborate on how the boot flow is going to be reused across
> Qcom platforms. Maybe we just need a dedicated spl.rst document here.

Ok.

> Also, how does this series align with one for SPL support on SDM845 here
> [1]? Are there things that both SPL ports can reuse from each other?
>
> [1] https://lore.kernel.org/all/20260411-qcom_spl-v2-0-9609557cf562@seznam.cz/

As I understand, board_spl.c and spl.c (in arch/arm/mach-snapdragon) of
Michael's patch and mine can reuse spl_boot_device() to include
BOOT_DEVICE_DFU and reset_cpu().

However, I still have to figure under which conditions spl_boot_device()
can return BOOT_DEVICE_DFU.

Thanks
-Varada

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