On Thursday 02 July 2009 03:17:43 ext Candelaria Villareal, Jorge wrote: > According to TRM, an external FET controlled by a 1.8V output signal > can be used to reduce the pop-noise heard when the audio amplifier is > switched on. It is suggested that GPIO6 of TWL4030 be used, but any > other gpio can be used instead. This is indicated in machine driver > with the following twl4030_setup_data members: > > -hs_extmute. Set to 1 if board has support for EXTMUTE. > > -set_hs_extmute. Set to a callback funcion to control an external gpio > line. Set to NULL if MUTE[GPIO6] pin is used. > > Codec driver takes care of enabling and disabling this output during > the headset pop attenuation sequence. > > Also add a delay to let VMID settle in ramp up sequence. I can not see any problems with this patch, but unfortunately I can not test it since none of my hardware supports the extmute on the headset output... Thank you! Acked-by: Peter Ujfalusi <peter.ujfalusi@xxxxxxxxx> _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
