Commit 9c9a5175 authored by Takashi Iwai's avatar Takashi Iwai
Browse files

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: default avatarTakashi Iwai <tiwai@suse.de>
parent be84bbcc

sound/pci/hda/hda_codec.c

+36 −0
Original line number Diff line number Diff line
@@ -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;

}

sound/pci/hda/hda_codec.h

+1 −0
Original line number Diff line number Diff line
@@ -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 */

sound/pci/hda/patch_realtek.c

+2 −0
Original line number Diff line number Diff line
@@ -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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