[U-Boot] Cannot boot mx6qsabred with 2019.07-rc2

[Peng Fan]

Hi Tom,

> Subject: Re: [U-Boot] Cannot boot mx6qsabred with 2019.07-rc2
> 
> On Thu, May 23, 2019 at 04:04:17PM +0200, Marek Vasut wrote:
> > On 5/23/19 3:59 PM, Tom Rini wrote:
> > > On Thu, May 23, 2019 at 10:49:11AM -0300, Fabio Estevam wrote:
> > >> Hi Peng,
> > >>
> > >> On Tue, May 21, 2019 at 10:38 PM Peng Fan <peng.fan at nxp.com>
> wrote:
> > >>
> > >>>> I will send a v2 removing CONFIG_SPL_DM.
> > >>>
> > >>> So what is the real direction moving to use SPL driver, non-dm is
> allowed in future?
> > >>
> > >> We are very limited in space when CONFIG_SPL_DM is used on
> imx6q-sabresd.
> > >>
> > >> With CONFIG_SPL_DM selected the size increase due to the three
> > >> dtb's is about 8kB.
> > >>
> > >> Even with CONFIG_SPL_DM disabled we ony have 1kB of free space, so
> > >> I still want to optimize the size further.
> > >
> > > So with CONFIG_SPL_DM we're overflowing by ~7kB?
> > >
> > >> Two options that I want also to remove are:
> > >>
> > >> CONFIG_SPL_FS_EXT4=y
> > >> CONFIG_SPL_I2C_SUPPORT=y
> > >>
> > >> We are at -rc2 now, and I would really like to have mx6sabresd booting
> again.
> > >>
> > >> Please check my v2 series and see if it looks good.
> > >
> > > We certainly want to do something to fix the regression, agreed.
> > >
> > > Looking at the config, can we just use a fake DTB for SPL that works
> > > on all 3 boards, rather than 3 DTBs?
> >
> > Mind you, all of that seems like a workaround. Removing functionality
> > just to fit the monster with DM/DT in is a no-go. R-Car Gen2 doesn't
> > use DM/DT in SPL because it just won't fit and I believe that
> > absolutely makes sense ; why should we impose DM/DT in SPL on MX6 only
> > to make it less usable?
> 
> Setting aside that as I said you don't have to use DM in SPL, 

I recalled that TPL could be allowed for non-DM, SPL and U-Boot
need to migrate to DM, so now/future we non-DM SPL is ok?

Thanks,
Peng.

maybe it's also
> worth noting you don't have to provide "describes the whole board"
> DTB files.  If as far as SPL is concerned there's no difference between board
> A, B and C, just make a DTS that describes the relevant hardware.
> 
> Also, platdata can help here too.
> 
> --
> Tom