ALSA: hda - don't create dysfunctional mixer controls for ca0132

It's possible that these amps are settable somehow, e g through
secret codec verbs, but for now, don't create the controls (as
they won't be working anyway, and cause errors in amixer).

Cc: stable@kernel.org
BugLink: https://bugs.launchpad.net/bugs/1038651
Signed-off-by: David Henningsson <david.henningsson@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/pci/hda/patch_ca0132.c b/sound/pci/hda/patch_ca0132.c
index 9c0ec0a..49750a9 100644 (file)
--- a/sound/pci/hda/patch_ca0132.c
+++ b/sound/pci/hda/patch_ca0132.c
@@ -275,6 +275,10 @@ static int _add_switch(struct hda_codec *codec, hda_nid_t nid, const char *pfx,
        int type = dir ? HDA_INPUT : HDA_OUTPUT;
        struct snd_kcontrol_new knew =
                HDA_CODEC_MUTE_MONO(namestr, nid, chan, 0, type);
+       if ((query_amp_caps(codec, nid, type) & AC_AMPCAP_MUTE) == 0) {
+               snd_printdd("Skipping '%s %s Switch' (no mute on node 0x%x)\n", pfx, dirstr[dir], nid);
+               return 0;
+       }
        sprintf(namestr, "%s %s Switch", pfx, dirstr[dir]);
        return snd_hda_ctl_add(codec, nid, snd_ctl_new1(&knew, codec));
 }
@@ -286,6 +290,10 @@ static int _add_volume(struct hda_codec *codec, hda_nid_t nid, const char *pfx,
        int type = dir ? HDA_INPUT : HDA_OUTPUT;
        struct snd_kcontrol_new knew =
                HDA_CODEC_VOLUME_MONO(namestr, nid, chan, 0, type);
+       if ((query_amp_caps(codec, nid, type) & AC_AMPCAP_NUM_STEPS) == 0) {
+               snd_printdd("Skipping '%s %s Volume' (no amp on node 0x%x)\n", pfx, dirstr[dir], nid);
+               return 0;
+       }
        sprintf(namestr, "%s %s Volume", pfx, dirstr[dir]);
        return snd_hda_ctl_add(codec, nid, snd_ctl_new1(&knew, codec));
 }