[alsa-devel] WM5102 - Help to make baytrail machine driver work

[Charles Keepax]

On Tue, May 09, 2017 at 09:57:14AM -0500, Pierre-Louis Bossart wrote:
> On 5/9/17 9:45 AM, Paulo Sergio wrote:
> >>>>How are you setting up the I2S? As in which side is master, what
> >>>>format are you using? Also do you see any over/underflow error,
> >>>>does the system complain with "Error playing sample".
> >>>
> >>>
> >>>The only part where I2S is explicity used on machine driver is this
> >>>setting on backend DAI (SSP0-Codec)
> >>>
> >>>dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
> >>>| SND_SOC_DAIFMT_CBS_CFS,
> >>>
> >>>And after setting the routes using routes mentioned on [3], I have no
> >>>errors, but no sound
> >>>
> >>>Note: Based on Lenovo code, I concluded this device uses ssp0, so I'm
> >>>using a fw file "fw_sst_0f28_ssp0.bin" posted another thread.
> >>>Could use the hacks used on kernel 4.11, but as I'm still testing with
> >>>kernel 4.4, using this fw would make things easier
> >>
> >>
> >>nope. I don't know how many issues we've fixed since 4.4 but it's not a
> >>matter of just swapping out one firmware with another. You'll have better
> >>luck with plain vanilla 4.11 + regular firmware and restarting modifying one
> >>of the latest machine drivers.
> >
> >Ok, I'll use 4.11 and post the results later
> >
> >Should I have any special care about I2S other than setting the format
> >um backend DAI?
> >Some module should be loaded?
> 
> Things to look for
> - SSP routing: has to be SSP0 on baytrail-CR
> - number of slots: 2 or 4. if 4 then use DSP mode
> - DAI format
> - MCLK
> 
> If I can get my hands on a WM5102 eval board I might be able to help with a
> MinnowMax board.

If you really want one I can ask about see if we can send you one
over?

Thanks,
Charles