ALSA: ctxfi: Implement channel maps (8d50cdc1) · Commits · 戴 / test

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), 1281024, 1281024);

		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