[alsa-devel] Please help in adding ams-delta support to ASoC

[Janusz Krzysztofik]

Hi Peter,

Peter Ujfalusi wrote:
> On Wednesday 27 May 2009 16:07:23 ext Janusz Krzysztofik wrote:
>> static struct omap_mcbsp_reg_cfg mcbsp_regs = {
>>          .spcr2 = FREE | XRST | GRST | XINTM(3) | FRST,
>>          .spcr1 =  RINTM(3) | RRST,
>>          .rcr2 =  RPHASE | RWDLEN2(OMAP_MCBSP_WORD_16) | RFRLEN2(0),
>>          .rcr1 = RWDLEN1(OMAP_MCBSP_WORD_16) | RFRLEN1(0),
>>          .xcr2 = XPHASE | XWDLEN2(OMAP_MCBSP_WORD_16) | XFRLEN2(0),
>>          .xcr1 =  XWDLEN1(OMAP_MCBSP_WORD_16) | XFRLEN1(0),
>>          .srgr1 = CLKGDV(0),
>>          .srgr2 = GSYNC,
>> };
> 
> I wonder has this been working at all???
> FPER is not configured in srgr2 (actually it is 0, which means that the frame 
> period is 1...)
> FWID is not configured in srgr1 (it is 0, which means the FS is a pulse, 
> length is 1)
> Since CLKXP, CLKRP is 0, it suggests inverted bitclock.
> FSXP, FSRP is 0, so it must have normal FS polarity in DSP mode, or inverted 
> polarity in I2S mode???
> Data delay is 0 for rx and tx.
> 
> In all, I think this is a missconfigured DSP_B mode with inverted bitclock.
> Can you try this:
>           err = snd_soc_dai_set_fmt(cpu_dai,
>                                     SND_SOC_DAIFMT_DSP_B |
>                                     SND_SOC_DAIFMT_IB_NF |
>                                     SND_SOC_DAIFMT_CBM_CFM);

Already tried before, did not help.

>> So I will try the following then:
>>          err = snd_soc_dai_set_fmt(cpu_dai,
>>                                    SND_SOC_DAIFMT_DSP_B |
>>                                    SND_SOC_DAIFMT_NB_IF |
>>                                    SND_SOC_DAIFMT_CBM_CFM);
>> and this:
>>          err = snd_soc_dai_set_fmt(cpu_dai,
>>                                    SND_SOC_DAIFMT_DSP_A |
>>                                    SND_SOC_DAIFMT_NB_IF |
>>                                    SND_SOC_DAIFMT_CBM_CFM);
>> and give you a feedback.

Sorry, I did not answer since I gave up trying different dai format 
settings after discovering that the original driver still worked with 
register settings taken directly form its prototype osk board code.

Anyway, I think I'll have to get back here after DMA interrupts start 
working.

Thanks,
Janusz