On Wed, Mar 12, 2014 at 11:25:32AM +0200, Jyri Sarha wrote: > On 03/12/2014 05:02 AM, Nicolin Chen wrote: > >The current simple-card driver separates the daimft for cpu_dai and codec_dai. > >So we might get different values for them (0x4003 and 0x1003 for example): > > > >asoc-simple-card sound-cs42888.12: cpu : 2024000.esai / 4003 / 132000000 > >asoc-simple-card sound-cs42888.12: codec : cs42888 / 1003 / 24576000 > >asoc-simple-card sound-cs42888.12: cs42888 <-> 2024000.esai mapping ok > > > >This is not allowed at all as we need to keep the DAIFMT settings identical > >for both the ends of the link. > > > >Thus this patch fixes it by overwriting the cpu_dai->fmt with codec_dai->fmt > >since we defined the DAIFMT_MASTER basing on CODEC at the first place while > >the other bits are same. > > > >Signed-off-by: Nicolin Chen <Guangyu.Chen@xxxxxxxxxxxxx> > >--- > Hi Nicolin, > This patch is an improvement, but in my opinion the binding is still > a bit confusing. > > How about changing 'frame-master' and 'bitclock-master' to > 'codec-frame-master' and 'codec-bitclock-master'. We could possibly > keep the old names as aliases until all the .dts files out there > have been fixed. > > At the same go we could add SND_SOC_DAIFMT_MASTER_MASK here: > > > /* get CPU/CODEC common format via simple-audio-card,format */ > > priv->daifmt = snd_soc_of_parse_daifmt(node, "simple-audio-card,") & > > (SND_SOC_DAIFMT_FORMAT_MASK | SND_SOC_DAIFMT_INV_MASK); > > or leave the masking out all together. Can't see why > SND_SOC_DAIFMT_CONT/GATED could not be defined at dai-link level > too. > > This way the norm would be defining the daifmt at link level. We > could still keep the possibility to overwrite the setting at dai > level if there is need for that. Hi Jyri, After looking at Morimoto-san's mail, I think there might be a better solution for this issue as he suggested: We may move the fmt from struct asoc_simple_dai to a common place for both CPU and CODEC. I'm not sure if there's any defect from this idea, but as long as we keep DAIFMT settings identical for both dai-link ends, it'll be a neater way. So I'd like to pend this patch and wait for further solution from that topic. Thank you, Nicolin Chen -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
