Re: [PATCH 07/18] mx6memcal: Disable USB GADGET in SPL

[Eric Nelson <ericnelsonaz@gmail.com>]

Hi Tom,

On 5/25/21 9:45 AM, Tom Rini wrote:
> On Tue, May 25, 2021 at 09:19:30AM -0700, Eric Nelson wrote:
>> Hi Tom,
>>
>> On 5/25/21 8:47 AM, Tom Rini wrote:
>>> On Tue, May 25, 2021 at 07:10:29AM -0700, Eric Nelson wrote:
>>>
>>>> Since the proper U-Boot doesn't do anything at the moment, I don't think
>>>> this hurts much.
>>>>
>>>> My usage of mx6memcal generally ends after SPL spits out calibration
>>>> values, and I suspect the same is true for other users, so
>>>>
>>>> Acked-by: Eric Nelson <eric@nelint.com>
>>> But don't you need SPL gadget support to easily load this in?
>>>
>> No. The calibration is done by the SPL running in internal RAM.
> ... ah, yes, sorry, I'm with you now.  ROM loads via gadget, SPL runs,
> does memcalc, displays values, then you move on to the real board.
>

And test under Linux, where you can exercise things with the GPU and VPU
active.

Testing under U-Boot doesn't tend to find calibration errors.

It would be helpful to test under U-Boot by adding support for changing up
the DDR frequencies (as done in the NXP test), but that's something for
another day.