At Tue, 28 Aug 2007 05:08:02 +0300, Maxim Levitsky wrote:
From 204b216691b2d74e100bc321654ddadd2ff710af Mon Sep 17 00:00:00 2001 From: Maxim Levitsky maximlevitsky@gmail.com Date: Tue, 28 Aug 2007 01:06:00 +0300 Subject: [PATCH] HDA: add support for analog loopback to STAC9204/9205/922x/927x
sound/pci/hda/patch_sigmatel.c | 59 ++++++++++++++++++++++++++++++++++++++++ 1 files changed, 59 insertions(+), 0 deletions(-)
diff --git a/sound/pci/hda/patch_sigmatel.c b/sound/pci/hda/patch_sigmatel.c index 12b318e..a1f55d1 100644 --- a/sound/pci/hda/patch_sigmatel.c +++ b/sound/pci/hda/patch_sigmatel.c @@ -128,6 +128,7 @@ struct sigmatel_spec { /* i/o switches */ unsigned int io_switch[2]; unsigned int clfe_swap;
unsigned int aloopback;
struct hda_pcm pcm_rec[2]; /* PCM information */
@@ -277,6 +278,50 @@ static int stac92xx_mux_enum_put(struct snd_kcontrol *kcontrol, struct snd_ctl_e spec->mux_nids[adc_idx], &spec->cur_mux[adc_idx]); }
+static int stac92xx_aloopback_info(struct snd_kcontrol *kcontrol,
- struct snd_ctl_elem_info *uinfo)
+{
- uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
- uinfo->count = 1;
- uinfo->value.integer.min = 0;
- uinfo->value.integer.max = 1;
- return 0;
+}
Use snd_ctl_boolean_mono_info().
+static int stac92xx_aloopback_get(struct snd_kcontrol *kcontrol,
- struct snd_ctl_elem_value *ucontrol)
+{
- struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
- struct sigmatel_spec *spec = codec->spec;
- ucontrol->value.integer.value[0] = spec->aloopback;
- return 0;
+}
+static int stac92xx_aloopback_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)+{
- struct hda_codec *codec = snd_kcontrol_chip(kcontrol);
- struct sigmatel_spec *spec = codec->spec;
- unsigned int dac_mode;
- spec->aloopback = ucontrol->value.integer.value[0];
- dac_mode = snd_hda_codec_read(codec, codec->afg, 0,
kcontrol->private_value & 0xFFFF, 0x0);- if (spec->aloopback)
dac_mode |= 0x40;- else
dac_mode &= ~0x40;- snd_hda_codec_write(codec, codec->afg, 0,
kcontrol->private_value >> 16, dac_mode);- return 1;
+}
Check the value change, and use snd_hda_codec_write_cache().
Takashi