On Monday 09 January 2017 11:27:49 Mark Brown wrote: > On Sat, Jan 07, 2017 at 12:07:49AM +0100, Pali Rohár wrote: > > > All that is needed in N900 sound driver, file sound/soc/omap/rx51.c. Can > > you help me which functions should I call to enable/disable it > > correctly? In headset detection code I need to be sure that nobody > > (other kernel drivers or userspace via alsamixer) except current > > function could change Bias settings. > > > MIC Bias is controlled by MICBIAS_CTRL in aic34 'B' part codec, file > > tlv320aic3x.c. > > Microphone biases are normally controlled by supply widgets and managed > via DAPM. You can see quite a few examples of this in existing drivers. So... can I call snd_soc_dapm_mutex_lock(dapm) at function startup, start doing cable detection and when needed call this? snd_soc_dapm_enable_pin_unlocked(dapm, "HS Mic"); snd_soc_dapm_sync_unlocked(dapm); And at the end of function revert back "HS Mic" pin status and call snd_soc_dapm_mutex_unlock(dapm)? -- Pali Rohár pali.rohar@xxxxxxxxx -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
