Re: [PATCH v8 08/10] gpu: host1x: mipi: Keep MIPI clock enabled till calibration is done

[Sowjanya Komatineni]

On 8/6/20 9:45 AM, Dmitry Osipenko wrote:
> 06.08.2020 19:41, Sowjanya Komatineni пишет:
> ...
> > > What about to add 72us delay to the end of start_calibration() in order
> > > to ensure that FSM is finished before LP-11?
> > Why we should add 72uS in start_calibration() when can use same
> > finish_calibration() for both pass/fail cases?
> >
> > Only timing loose we see is in case of failure we still wait for 250ms
> > and as this is failing case I hope should be ok.
> You said that calibration settings are applied to pads on LP-11, but if
> LP-11 happens before FSM is finished, then what values will be applied
> if any?

No calibration logic will check for LP-11 only after finishing 
calibration sequence codes.

After that if it sees LP-11, it will apply results to pads and DONE bit 
will then be set to 1 indication pad results update.

Unfortunately like I said we don't have status indication for 
calibrating finished before waiting for LP-11.

ACTIVE bit is common for all PADS. If multiple 6 streams are happening 
in parallel, ACTIVE will be 1 as long as its calibrating any of the pads 
and its not for individual pads.