On Friday 25 September 2009 09:03:06 Ujfalusi Peter (Nokia-D/Tampere) wrote: > Hello, > > On Thursday 24 September 2009 20:06:07 ext Rick Bronson wrote: > > Hi, > > > > I'm working on getting a WM8731 (in SLAVE) working using I2S on > > omap3 McBSP2 (in MASTER). > > > > > > static int omap3csb740_hw_params(struct snd_pcm_substream *substream, > > ... > > ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S | > > SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS); > > ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S | > > SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS); > > ret = snd_soc_dai_set_sysclk(codec_dai, 0, 12288000, > > SND_SOC_CLOCK_IN); ret = snd_soc_dai_set_sysclk(cpu_dai, > > OMAP_MCBSP_SYSCLK_CLKS_EXT, 0, SND_SOC_CLOCK_IN); > > I think the problem is here. > The MCBSP_CLKS pin is connected to CLK256FS pin of TWL4030 (or TPA). This applies for the Beagle board, which I thought that you are using that from this line: > 4 beagle:~# aplay test48000.wav Can you check that the clock is running between CLKOUT (WM8731) -> McBSP_CLKS (OMAP3) pins? If the clock is missing, than the functional clock is not running. > Since you are not using the TWL codec, there will be no clock on the > MCBSP_CLKS pin, thus no functional clock for McBSP, thus no bits are > shifted in or out. You can try to use the internal functional clock: > > ret = snd_soc_dai_set_sysclk(cpu_dai, OMAP_MCBSP_SYSCLK_CLKS_FCLK, 0, > SND_SOC_CLOCK_IN); > > Than set the correct divider, which depends on the frequency you would like > to play. The source for the CLKS_FCLK is (in case of McBSP2) PER_96M_FCLK, > so 96MHz. Now you have to divide this to get the correct value, as I > recall quite a long time ago there were some discussion about this here, > and I have sent some 'formula' to calculate it, but I can not find it now > :( > > > ret = snd_soc_dai_set_clkdiv(cpu_dai, OMAP_MCBSP_CLKGDV, 256); > > > > Any help is greatly appreciated. > > > > Rick Bronson > -- Péter _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
