[alsa-devel] [PATCH 1/4] ASoC: sgtl5000: give it a ramping time before writting
shawn.guo at linaro.org
Tue Jul 2 04:16:53 CEST 2013
On Mon, Jul 01, 2013 at 07:43:27PM +0200, Marek Vasut wrote:
> Dear Fabio Estevam,
> > On Mon, Jul 1, 2013 at 12:33 PM, Shawn Guo <shawn.guo at linaro.org> wrote:
> > > On Mon, Jul 01, 2013 at 12:11:58PM -0300, Fabio Estevam wrote:
> > >> On Mon, Jul 1, 2013 at 11:34 AM, Shawn Guo <shawn.guo at linaro.org> wrote:
> > >> > And also why we do not see the impact of i2c issue on sgtl5000 before
> > >> > the offending commit af8ee11 (ASoC: sgtl5000: Fix driver probe after
> > >> > reset)?
> > >>
> > >> Probably because the mxs i2c was working before this commit.
> > >
> > > Do you have a commit id at which mxs i2c is known good? I would like to
> > > find out it's a mxs i2c issue or sgtl5000 problem.
> > I don't have it, but I am adding Alexandre in case he knows.
> > Alexandre,
> > Do you happen to know a commit id which does not show the mxs i2c
> > timeouts you have been observing?
> I think you can just disable the PIO mode altogether (around line 500 ... if
> (msg->len < 8) ... replace this with if (0) ) and then the problem should not be
> there (if it's a PIO problem).
Ok, Fabio is right. With the change, sgtl5000 write works even without
So, Mark, please disregard the patch, and we should fix mxs i2c driver
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