Re: [alsa-devel] [RFC PATCH] ASoC: wm8741: Add differential mono mode support

On Fri, May 01, 2015 at 08:13:57PM +0200, Sergej Sawazki wrote:

+static const struct snd_kcontrol_new wm8741_snd_controls_mono_right[] = {

• SOC_SINGLE_TLV("Fine Playback Volume Right", WM8741_DACRLSB_ATTENUATION,

• 1, 255, 1, dac_tlv_fine),
  

• SOC_SINGLE_TLV("Playback Volume Right", WM8741_DACRMSB_ATTENUATION,

• 0, 511, 1, dac_tlv),
  

+};

Please follow the control naming standard in ControlNames.txt: all volume controls must have Volume as the last word in the name.

.name = "wm8741", .playback = { .stream_name = "Playback",

• .channels_min = 2,  /* Mono modes not yet supported */
  

• .channels_min = 1,
  

  .channels_max = 2,

This should be varying with the platform data: in the mono modes we can't do stereo and I suspect the stereo modes may have issues with mono.