Folks:
I am trying to figure out how the mixer control structurs are done for
each of the
codecs in the patch_sigmatel file for the Sigmatel codecs.
A sample of one is as follows:
====================
static struct snd_kcontrol_new stac925x_mixer[] = {
HDA_CODEC_VOLUME("Master Playback Volume", 0xe, 0, HDA_OUTPUT),
HDA_CODEC_MUTE("Master Playback Switch", 0xe, 0, HDA_OUTPUT),
{
.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
.name = "Input Source",
.count = 1,
.info = stac92xx_mux_enum_info,
.get = stac92xx_mux_enum_get,
.put = stac92xx_mux_enum_put,
},
HDA_CODEC_VOLUME("Capture Volume", 0x09, 0, HDA_OUTPUT),
HDA_CODEC_MUTE("Capture Switch", 0x09, 0, HDA_OUTPUT),
HDA_CODEC_VOLUME("Capture Mux Volume", 0x0f, 0, HDA_OUTPUT),
{ } /* end */
};
====================
I am having a hard time seeing the connection between the widgets that
have a volume
control and the entries in the stac mixer structure above. Where are the
NID's for each
entry of this structure?
Also, the value HAD_OUTPUT is used apparently for both a capture node as
well as an
output node. Where would HDA_INPUT be used?
Is there any documentation on just how this structure is composed for a
new device?
Thanks for your help.
Mark
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