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    Subject[24/28] ALSA: hda - Fix initialization of secondary capture source on VT1705
    3.2-stable review patch.  If anyone has any objections, please let me know.

    ------------------

    From: Takashi Iwai <tiwai@suse.de>

    commit fc1156c0b0f7ad45ec03d919866349eeca2bf18c upstream.

    VT1705 codec has two ADCs where the secondary ADC has no MUX but only
    a fixed connection to the mic pin. This confused the driver and it
    tries always overriding the input-source selection by assumption of
    the existing MUX for the secondary ADC, resulted in resetting the
    input-source at each time PM (including power-saving) occurs.

    The fix is simply to check the existence of MUX for secondary ADCs in
    the initialization code.

    Tested-by: Anisse Astier <anisse@astier.eu>
    Signed-off-by: Takashi Iwai <tiwai@suse.de>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    sound/pci/hda/patch_via.c | 3 +++
    1 file changed, 3 insertions(+)

    --- a/sound/pci/hda/patch_via.c
    +++ b/sound/pci/hda/patch_via.c
    @@ -665,6 +665,9 @@ static void via_auto_init_analog_input(s
    /* init input-src */
    for (i = 0; i < spec->num_adc_nids; i++) {
    int adc_idx = spec->inputs[spec->cur_mux[i]].adc_idx;
    + /* secondary ADCs must have the unique MUX */
    + if (i > 0 && !spec->mux_nids[i])
    + break;
    if (spec->mux_nids[adc_idx]) {
    int mux_idx = spec->inputs[spec->cur_mux[i]].mux_idx;
    snd_hda_codec_write(codec, spec->mux_nids[adc_idx], 0,



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