[PATCH] mach-k3: am62*: am62*_init: Prohibit boot from UDA w/ eMMC boot

[Michael Nazzareno Trimarchi]

Hi

Could be html for my mobile. Some comments inline.

Il ven 11 lug 2025, 11:44 Anshul Dalal <anshuld at ti.com> ha scritto:

> On Thu Jul 10, 2025 at 10:41 PM IST, Judith Mendez wrote:
> > This removes support from booting from UDA when in eMMC boot.
> >
> > When user selects eMMC boot [0], that is, boot from eMMC boot0 or
> > boot1 HW partitions, we should not boot from eMMC UDA. The current
> > logic confuses the end user and mixes two different boot modes.
> >
>
> This is correct, we should not be changing the eMMC boot mode based on
> what U-Boot config is enabled.
>
> The end user can always use MMCSD as the backup boot mode if they want
> a fallback.
>
> > The logic was added for AM62A/AM62P with commit: 3b7893145e36, but
> > this is not a clean solution and fix will come later for falcon boot.
> >
> > Logic was also added for AM62X with commit: 664593464634, but this
> > logic is incorrect according to TRM [0] under Primary Boot Mode Selection
> > for 'eMMC Boot'.
> >
> > Fixes: 3b7893145e36 ("mach-k3: add eMMC FS boot support for am62[ap]")
> > Fixes: 664593464634 ("arm: mach-k3: am625: Relax emmc boot condition")
> > Signed-off-by: Judith Mendez <jm at ti.com>
>
> Reviewed-by: Anshul Dalal <anshuld at ti.com>
>

First of all this is not a fix. A fix when you have something that is not
working . Then the commit was having a reason the boot0 and boot1 can have
limited size that does not allow to have all the TI ecosystem on boot
partition and then you must use the the rest of emmc. Booting from this
scenario is totally fine

Michael

>
>
> Thanks for the fix,
> Anshul
>