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@xxxxxxxxx>
> 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
_______________________________________________
Alsa-devel mailing list
Alsa-devel@xxxxxxxxxxxxxxxx
http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
