Re: [alsa-devel] [PATCH v14 8/8] ASoC: sun4i-codec: Add Left Capture Select, Right Capture Select

Hi Maxime,

On Thu, 3 May 2018 16:54:08 +0200 Maxime Ripard maxime.ripard@bootlin.com wrote:

...

+static const char * const sun4i_codec_capture_source[] = {

• "Line",
• "FM",
• "Mic1",
• "Mic2",
• "Mic1,Mic2",
• "Mic1+Mic2",
• "Output Mixer",
• "Line,Mic1",

+};

Shouldn't that be defined in a more generic way? As far as I know, there's no way to tell what the difference between "Mic1,Mic2" and "Mic1+Mic2" would be from the userspace.

Sounds good - but how?

Here, "Mic1,Mic2" means the left channel captured is Mic1 and the right channel captured is Mic2.

On the other hand, "Mic1+Mic2" means that the signals from Mic1 and Mic2 are added together and that is captured (both as left and as right).

"Mic1" means both the left channel and the right channel captured is from Mic1. Likewise "Mic2".