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

Eric Nelson ericnelsonaz at gmail.com
Tue May 25 18:51:22 CEST 2021

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 at 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

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.

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