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 <e...@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.
