On 2011-03-08 10:14, Dimitris Papastamos wrote:
On Mon, Mar 07, 2011 at 06:04:20PM +0100, Christian Glindkamp wrote:
+static const struct snd_soc_dapm_widget max9850_dapm_widgets[] = { +SND_SOC_DAPM_DAC("DAC", "HiFi Playback", MAX9850_ENABLE, 0, 0), +SND_SOC_DAPM_SUPPLY("MCLK", MAX9850_ENABLE, 6, 0, NULL, 0), +SND_SOC_DAPM_OUTPUT("OUTL"), +SND_SOC_DAPM_OUTPUT("OUTR"), +SND_SOC_DAPM_OUTPUT("HPL"), +SND_SOC_DAPM_OUTPUT("HPR"), +SND_SOC_DAPM_INPUT("INL"), +SND_SOC_DAPM_INPUT("INR"), +SND_SOC_DAPM_PGA("Headphone Output", MAX9850_ENABLE, 3, 0, NULL, 0), +SND_SOC_DAPM_MIXER("Line Input", SND_SOC_NOPM, 0, 0, NULL, 0), +SND_SOC_DAPM_MIXER_NAMED_CTL("Output Mixer", MAX9850_ENABLE, 2, 0,
&max9850_mixer_controls[0],ARRAY_SIZE(max9850_mixer_controls)),+};
Consider grouping the input and output pins logically separately.
Do you mean something like that?
SND_SOC_DAPM_SUPPLY("MCLK", MAX9850_ENABLE, 6, 0, NULL, 0), SND_SOC_DAPM_MIXER_NAMED_CTL("Output Mixer", MAX9850_ENABLE, 2, 0, &max9850_mixer_controls[0], ARRAY_SIZE(max9850_mixer_controls)), SND_SOC_DAPM_PGA("Headphone Output", MAX9850_ENABLE, 3, 0, NULL, 0), SND_SOC_DAPM_DAC("DAC", "HiFi Playback", MAX9850_ENABLE, 0, 0), SND_SOC_DAPM_OUTPUT("OUTL"), SND_SOC_DAPM_OUTPUT("HPL"), SND_SOC_DAPM_OUTPUT("OUTR"), SND_SOC_DAPM_OUTPUT("HPR"), SND_SOC_DAPM_MIXER("Line Input", SND_SOC_NOPM, 0, 0, NULL, 0), SND_SOC_DAPM_INPUT("INL"), SND_SOC_DAPM_INPUT("INR"),
Yea, that's fine. Although the standard thing to do is to group all the input pins at the beginning and all the output pins at the end. However this is a pretty primitive codec so it is not a problem as it stands now.
Charge pump could also be a supply for the Output Mixer. Have to find out how to toggle two bits at once via dapm (preferably without resorting to callbacks).
If they are in the same register and same type of widgets then as Mark mentioned the core guarantees that it'll be done in one register write.
I forgot to mention in the previous e-mail, that if you add the cache syncing support during resume or whenever we go from BIAS_OFF to STANDBY use the standard ASoC function for that, snd_soc_cache_sync(). Just in case you are looking at older examples.
Do I understand it correctly, that all register writes that I do in the probe function would be overridden by the syncing so they would have to be moved to the standby code or put into the register cache array as default values?
Thanks, Dimitris _______________________________________________ Alsa-devel mailing list Alsa-devel@alsa-project.org http://mailman.alsa-project.org/mailman/listinfo/alsa-devel