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

[Marek Vasut]

On 5/23/19 4:50 PM, Tom Rini wrote:
> On Thu, May 23, 2019 at 04:47:59PM +0200, Michael Nazzareno Trimarchi wrote:
>> Hi
>>
>> On Thu, May 23, 2019 at 4:33 PM Tom Rini <trini at konsulko.com> wrote:
>>>
>>> On Thu, May 23, 2019 at 02:08:23PM +0000, Abel Vesa wrote:
>>>> On 19-05-23 09:59:05, 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?
>>>>
>>>> Well, the mandatory requirements here are as follow (AFAIK):
>>>> 1. keep one binary for all imx6dl imx6[qp|dl|q]-sabresd
>>>> 2. have DM support in SPL
>>>>
>>>> So I guess we have to either prioritize the other needed configs and
>>>> leave out the one we can do without. That, ofcourse, if we still want
>>>> to fit in and we still want one binary for all three sabresd boards.
>>>
>>> Well, no, you don't have to use DM in SPL.  But what I'm wondering is if
>>> we need qp/dl/q specific information at the SPL stage or if that can
>>> wait until we're doing the real U-Boot.
>>
>> Is dcd table take space?
> 
> The DCD table is included in that hard size limit, but yes, if there's
> QP/DL/Q specific stuff that we could handle via the plugin mechanism or
> similar, that might be part of the solution.

You do need Q/DL/S specific stuff in SPL for e.g. pinmux .
And you want to minimize the DCD table and move all that logic into SPL,
since the DCD is rather limited.

-- 
Best regards,
Marek Vasut