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

[Dmitry Osipenko]

06.08.2020 20:52, Sowjanya Komatineni пишет:
...
> Right mutex_unlock should happen at end of finish_calibration.
> 
> With keeping mutex locked in start, we dont have to check for active to
> be 0 to issue start as mutex will keep it locked and other pads
> calibration can only go thru when current one is done.
> 
> So instead of below sequence, its simpler to do this way?
> 
> start_calibration()
> 
> - mutex_lock
> 
> - wait for 72uS after start
> 
> finish_calibration()
> 
> - keep check for ACTIVE = 0 and DONE = 1

I think only the DONE bits which correspond to the mipi_device->pads
bitmask should be awaited.

> - mutex_unlock()

Perhaps the start_calibration() also needs to be changed to not touch
the MIPI_CAL_CONFIG bits of the unrelated pads?

Otherwise sounds good to me.