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Commit 8d50cdc1 authored by Takashi Iwai's avatar Takashi Iwai
Browse files

ALSA: ctxfi: Implement channel maps 



Assign the multi-channel map to front PCM, and other channel map to
each other channel PCM.

Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent f49921b8

sound/pci/ctxfi/ctpcm.c

+50 −0
Original line number Diff line number Diff line
@@ -395,12 +395,38 @@ static struct snd_pcm_ops ct_pcm_capture_ops = { 
	.page		= snd_pcm_sgbuf_ops_page,

};



static const struct snd_pcm_chmap_elem surround_map[] = {

	{ .channels = 1,

	  .map = { SNDRV_CHMAP_RC } },

	{ .channels = 2,

	  .map = { SNDRV_CHMAP_RL, SNDRV_CHMAP_RR } },

	{ }

};



static const struct snd_pcm_chmap_elem clfe_map[] = {

	{ .channels = 1,

	  .map = { SNDRV_CHMAP_FC } },

	{ .channels = 2,

	  .map = { SNDRV_CHMAP_FC, SNDRV_CHMAP_LFE } },

	{ }

};



static const struct snd_pcm_chmap_elem side_map[] = {

	{ .channels = 1,

	  .map = { SNDRV_CHMAP_RC } },

	{ .channels = 2,

	  .map = { SNDRV_CHMAP_SL, SNDRV_CHMAP_SR } },

	{ }

};



/* Create ALSA pcm device */

int ct_alsa_pcm_create(struct ct_atc *atc,

		       enum CTALSADEVS device,

		       const char *device_name)

{

	struct snd_pcm *pcm;

	const struct snd_pcm_chmap_elem *map;

	int chs;

	int err;

	int playback_count, capture_count;
@@ -427,6 +453,30 @@ int ct_alsa_pcm_create(struct ct_atc *atc, 
	snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV_SG,

			snd_dma_pci_data(atc->pci), 128*1024, 128*1024);



	chs = 2;

	switch (device) {

	case FRONT:

		chs = 8;

		map = snd_pcm_std_chmaps;

		break;

	case SURROUND:

		map = surround_map;

		break;

	case CLFE:

		map = clfe_map;

		break;

	case SIDE:

		map = side_map;

		break;

	default:

		map = snd_pcm_std_chmaps;

		break;

	}

	err = snd_pcm_add_chmap_ctls(pcm, SNDRV_PCM_STREAM_PLAYBACK, map, chs,

				     0, NULL);

	if (err < 0)

		return err;



#ifdef CONFIG_PM_SLEEP

	atc->pcms[device] = pcm;

#endif