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authorTakashi Iwai <tiwai@suse.de>2012-07-31 11:35:35 +0200
committerTakashi Iwai <tiwai@suse.de>2012-09-06 18:01:18 +0200
commit9c9a5175e65b2667001e6a3b6dedddebeee82aa2 (patch)
tree245f9651869624fe47c1c7e4549e30d56b277c98 /sound/pci/hda
parentbe84bbcccc757b86449daaf924e72f95c95dc00e (diff)
downloadop-kernel-dev-9c9a5175e65b2667001e6a3b6dedddebeee82aa2.zip
op-kernel-dev-9c9a5175e65b2667001e6a3b6dedddebeee82aa2.tar.gz
ALSA: hda - Add standard channel maps
Although HD-audio allows pair-wise channel configurations, only the fixed channel positions are used in this version. In future, this can be changed and allow user to modify the channel positions. Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/pci/hda')
-rw-r--r--sound/pci/hda/hda_codec.c36
-rw-r--r--sound/pci/hda/hda_codec.h1
-rw-r--r--sound/pci/hda/patch_realtek.c2
3 files changed, 39 insertions, 0 deletions
diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c
index ff97cf3..c4c62ed 100644
--- a/sound/pci/hda/hda_codec.c
+++ b/sound/pci/hda/hda_codec.c
@@ -3688,6 +3688,36 @@ int /*__devinit*/ snd_hda_build_controls(struct hda_bus *bus)
}
EXPORT_SYMBOL_HDA(snd_hda_build_controls);
+/*
+ * add standard channel maps if not specified
+ */
+static int add_std_chmaps(struct hda_codec *codec)
+{
+ int i, str, err;
+
+ for (i = 0; i < codec->num_pcms; i++) {
+ for (str = 0; str < 2; str++) {
+ struct snd_pcm *pcm = codec->pcm_info[i].pcm;
+ struct hda_pcm_stream *hinfo =
+ &codec->pcm_info[i].stream[str];
+ struct snd_pcm_chmap *chmap;
+
+ 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,
+ hinfo->channels_max,
+ 0, &chmap);
+ if (err < 0)
+ return err;
+ chmap->channel_mask = SND_PCM_CHMAP_MASK_2468;
+ }
+ }
+ return 0;
+}
+
int snd_hda_codec_build_controls(struct hda_codec *codec)
{
int err = 0;
@@ -3699,6 +3729,12 @@ int snd_hda_codec_build_controls(struct hda_codec *codec)
err = codec->patch_ops.build_controls(codec);
if (err < 0)
return err;
+
+ /* we create chmaps here instead of build_pcms */
+ err = add_std_chmaps(codec);
+ if (err < 0)
+ return err;
+
snd_hda_jack_report_sync(codec); /* call at the last init point */
return 0;
}
diff --git a/sound/pci/hda/hda_codec.h b/sound/pci/hda/hda_codec.h
index 8fd9f63..ed3de8d 100644
--- a/sound/pci/hda/hda_codec.h
+++ b/sound/pci/hda/hda_codec.h
@@ -776,6 +776,7 @@ struct hda_pcm {
unsigned int pcm_type; /* HDA_PCM_TYPE_XXX */
int device; /* device number to assign */
struct snd_pcm *pcm; /* assigned PCM instance */
+ bool own_chmap; /* codec driver provides own channel maps */
};
/* codec information */
diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
index 6134999..1907dda 100644
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -2287,6 +2287,8 @@ static int alc_build_pcms(struct hda_codec *codec)
p = &alc_pcm_analog_playback;
info->stream[SNDRV_PCM_STREAM_PLAYBACK] = *p;
info->stream[SNDRV_PCM_STREAM_PLAYBACK].nid = spec->multiout.dac_nids[0];
+ info->stream[SNDRV_PCM_STREAM_PLAYBACK].channels_max =
+ spec->multiout.max_channels;
}
if (spec->adc_nids) {
p = spec->stream_analog_capture;
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