[ALSA] Fix CM9761A codec support

AC97 Codec
Fixed the codec patch for (probably) CM9761A.  It looks incompatible
with other CM9761 models.
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/ac97/ac97_codec.c

@@ -120,7 +120,8 @@ static const ac97_codec_id_t snd_ac97_codec_ids[] = {
 { 0x434d4961, 0xffffffff, "CMI9739",		patch_cm9739,	NULL },
 { 0x434d4978, 0xffffffff, "CMI9761",		patch_cm9761,	NULL },
 { 0x434d4982, 0xffffffff, "CMI9761",		patch_cm9761,	NULL },
-{ 0x434d4983, 0xffffffff, "CMI9761",		patch_cm9761,	NULL },
+/* { 0x434d4983, 0xffffffff, "CMI9761",		patch_cm9761,	NULL }, */
+{ 0x434d4983, 0xffffffff, "CMI9761A",		patch_cm9761a,	NULL },
 { 0x43525900, 0xfffffff8, "CS4297",		NULL,		NULL },
 { 0x43525910, 0xfffffff8, "CS4297A",		patch_cirrus_spdif,	NULL },
 { 0x43525920, 0xfffffff8, "CS4298",		patch_cirrus_spdif,		NULL },

sound/pci/ac97/ac97_patch.c

@@ -2094,6 +2094,34 @@ int patch_cm9761(ac97_t *ac97)
 	return 0;
 }
        
+/* CM9761-A is incompatible with CM9761 */
+int patch_cm9761a(ac97_t *ac97)
+{
+	unsigned short val;
+
+	ac97->build_ops = &patch_cm9761_ops;
+
+#if 0
+	/* enable spdif */
+	/* force the SPDIF bit in ext_id - codec doesn't set this bit! */
+        ac97->ext_id |= AC97_EI_SPDIF;
+	/* to be sure: we overwrite the ext status bits */
+	snd_ac97_write_cache(ac97, AC97_EXTENDED_STATUS, 0x05c0);
+	snd_ac97_write_cache(ac97, AC97_CM9761_SPDIF_CTRL, 0x0209);
+	ac97->rates[AC97_RATES_SPDIF] = SNDRV_PCM_RATE_48000; /* 48k only */
+#endif
+	/* set-up multi channel */
+	val = snd_ac97_read(ac97, AC97_CM9761_MULTI_CHAN);
+	val |= (1 << 4);
+	snd_ac97_write_cache(ac97, AC97_CM9761_MULTI_CHAN, val);
+
+	/* FIXME: set up GPIO */
+	snd_ac97_write_cache(ac97, 0x70, 0x0100);
+	snd_ac97_write_cache(ac97, 0x72, 0x0020);
+
+	return 0;
+}
+       
 
 /*
  * VIA VT1616 codec

sound/pci/ac97/ac97_patch.h

@@ -53,6 +53,7 @@ int patch_alc850(ac97_t * ac97);
 int patch_cm9738(ac97_t * ac97);
 int patch_cm9739(ac97_t * ac97);
 int patch_cm9761(ac97_t * ac97);
+int patch_cm9761a(ac97_t * ac97);
 int patch_vt1616(ac97_t * ac97);
 int patch_it2646(ac97_t * ac97);
 int mpatch_si3036(ac97_t * ac97);