ALSA: ymfpci - Don't create invalid PCM & mixers when AC97 doesn't support

- check SDAC bit of AC97 primary codec when create "rear" device 3,
  "4ch" device 2 and "4ch Duplication" switch as the card need a four channels
  AC97 codec to support surround40.

Signed-off-by: Raymond Yau <superquad.vortex2@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/pci/ymfpci/ymfpci.c b/sound/pci/ymfpci/ymfpci.c
index e57b89e..94ab728 100644 (file)
--- a/sound/pci/ymfpci/ymfpci.c
+++ b/sound/pci/ymfpci/ymfpci.c
@@ -286,17 +286,22 @@ static int __devinit snd_card_ymfpci_probe(struct pci_dev *pci,
                snd_card_free(card);
                return err;
        }
-       if ((err = snd_ymfpci_pcm_4ch(chip, 2, NULL)) < 0) {
+       err = snd_ymfpci_mixer(chip, rear_switch[dev]);
+       if (err < 0) {
                snd_card_free(card);
                return err;
        }
-       if ((err = snd_ymfpci_pcm2(chip, 3, NULL)) < 0) {
-               snd_card_free(card);
-               return err;
-       }
-       if ((err = snd_ymfpci_mixer(chip, rear_switch[dev])) < 0) {
-               snd_card_free(card);
-               return err;
+       if (chip->ac97->ext_id & AC97_EI_SDAC) {
+               err = snd_ymfpci_pcm_4ch(chip, 2, NULL);
+               if (err < 0) {
+                       snd_card_free(card);
+                       return err;
+               }
+               err = snd_ymfpci_pcm2(chip, 3, NULL);
+               if (err < 0) {
+                       snd_card_free(card);
+                       return err;
+               }
        }
        if ((err = snd_ymfpci_timer(chip, 0)) < 0) {
                snd_card_free(card);

diff --git a/sound/pci/ymfpci/ymfpci_main.c b/sound/pci/ymfpci/ymfpci_main.c
index 03ee4e3..12a9a2b 100644 (file)
--- a/sound/pci/ymfpci/ymfpci_main.c
+++ b/sound/pci/ymfpci/ymfpci_main.c
@@ -1614,6 +1614,14 @@ static int snd_ymfpci_put_dup4ch(struct snd_kcontrol *kcontrol, struct snd_ctl_e
        return change;
 }
 
+static struct snd_kcontrol_new snd_ymfpci_dup4ch __devinitdata = {
+       .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+       .name = "4ch Duplication",
+       .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
+       .info = snd_ymfpci_info_dup4ch,
+       .get = snd_ymfpci_get_dup4ch,
+       .put = snd_ymfpci_put_dup4ch,
+};
 
 static struct snd_kcontrol_new snd_ymfpci_controls[] __devinitdata = {
 {
@@ -1642,13 +1650,6 @@ YMFPCI_DOUBLE(SNDRV_CTL_NAME_IEC958("",CAPTURE,VOLUME), 1, YDSXGR_SPDIFLOOPVOL),
 YMFPCI_SINGLE(SNDRV_CTL_NAME_IEC958("",PLAYBACK,SWITCH), 0, YDSXGR_SPDIFOUTCTRL, 0),
 YMFPCI_SINGLE(SNDRV_CTL_NAME_IEC958("",CAPTURE,SWITCH), 0, YDSXGR_SPDIFINCTRL, 0),
 YMFPCI_SINGLE(SNDRV_CTL_NAME_IEC958("Loop",NONE,NONE), 0, YDSXGR_SPDIFINCTRL, 4),
-{
-       .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
-       .name = "4ch Duplication",
-       .info = snd_ymfpci_info_dup4ch,
-       .get = snd_ymfpci_get_dup4ch,
-       .put = snd_ymfpci_put_dup4ch,
-},
 };
 
 
@@ -1838,6 +1839,12 @@ int __devinit snd_ymfpci_mixer(struct snd_ymfpci *chip, int rear_switch)
                if ((err = snd_ctl_add(chip->card, snd_ctl_new1(&snd_ymfpci_controls[idx], chip))) < 0)
                        return err;
        }
+       if (chip->ac97->ext_id & AC97_EI_SDAC) {
+               kctl = snd_ctl_new1(&snd_ymfpci_dup4ch, chip);
+               err = snd_ctl_add(chip->card, kctl);
+               if (err < 0)
+                       return err;
+       }
 
        /* add S/PDIF control */
        if (snd_BUG_ON(!chip->pcm_spdif))