ALSA: hda - Apply a proper chmap for built-in 2.1 speakers
When 2.1 speakers are detected, use the corresponding channel map
instead of the standard map with front+rear surrounds.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c
index 569bc05..a8e7b00 100644
--- a/sound/pci/hda/hda_codec.c
+++ b/sound/pci/hda/hda_codec.c
@@ -3747,13 +3747,14 @@
struct hda_pcm_stream *hinfo =
&codec->pcm_info[i].stream[str];
struct snd_pcm_chmap *chmap;
+ const struct snd_pcm_chmap_elem *elem;
if (codec->pcm_info[i].own_chmap)
continue;
if (!pcm || !hinfo->substreams)
continue;
- err = snd_pcm_add_chmap_ctls(pcm, str,
- snd_pcm_std_chmaps,
+ elem = hinfo->chmap ? hinfo->chmap : snd_pcm_std_chmaps;
+ err = snd_pcm_add_chmap_ctls(pcm, str, elem,
hinfo->channels_max,
0, &chmap);
if (err < 0)
@@ -3764,6 +3765,19 @@
return 0;
}
+/* default channel maps for 2.1 speakers;
+ * since HD-audio supports only stereo, odd number channels are omitted
+ */
+const struct snd_pcm_chmap_elem snd_pcm_2_1_chmaps[] = {
+ { .channels = 2,
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR } },
+ { .channels = 4,
+ .map = { SNDRV_CHMAP_FL, SNDRV_CHMAP_FR,
+ SNDRV_CHMAP_LFE, SNDRV_CHMAP_LFE } },
+ { }
+};
+EXPORT_SYMBOL_GPL(snd_pcm_2_1_chmaps);
+
int snd_hda_codec_build_controls(struct hda_codec *codec)
{
int err = 0;