lkml.org 
[lkml]   [2019]   [Jul]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH V2 2/2] ASoC: fsl_esai: recover the channel swap after xrun
On Fri, Jul 05, 2019 at 07:03:47AM +0000, S.j. Wang wrote:
> >
> > > +
> > > + /* restore registers by regcache_sync */
> > > + fsl_esai_register_restore(esai_priv);
> > > +
> > > + regmap_update_bits(esai_priv->regmap, REG_ESAI_TCR,
> > > + ESAI_xCR_xPR_MASK, 0);
> > > + regmap_update_bits(esai_priv->regmap, REG_ESAI_RCR,
> > > + ESAI_xCR_xPR_MASK, 0);
> >
> > And just for curious, can (or shall) we stuff this personal reset to the reset()
> > function? I found this one is a part of the reset routine being mentioned in
> > the RM -- it was done after ESAI reset is done via ECR register.
> >
>
> There is a problem to do this, TPR/RPR need to be clear after configure the control
> register. (TCCR, TCR). So it seems not only one place (reset function) need to be
> changed.

Do you know (or remember) why we suddenly involve this TPR/PRP?
The driver has no problem so far, even if we don't have them.

The "personal reset" sounds like a feature that we would use to
reset TX or RX individually, while this hw_reset() does a full
reset for both TX and RX. So I wonder whether they're necessary.

\
 
 \ /
  Last update: 2019-07-09 02:58    [W:0.036 / U:0.256 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site