Commit 093b8494 authored by Takashi Iwai's avatar Takashi Iwai
Browse files

ALSA: usb-audio: Print more information in stream proc files 

For more debug and usability information, add the entry showing the
DSD raw states and the channel mapping in each stream proc file.

Link: https://lore.kernel.org/r/20200419212134.14200-1-tiwai@suse.de


Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent aa08ff0f

sound/usb/proc.c

+53 −0
Original line number Diff line number Diff line
@@ -54,6 +54,38 @@ void snd_usb_audio_create_proc(struct snd_usb_audio *chip) 
			     proc_audio_usbid_read);

}



static const char * const channel_labels[] = {

	[SNDRV_CHMAP_NA]	= "N/A",

	[SNDRV_CHMAP_MONO]	= "MONO",

	[SNDRV_CHMAP_FL]	= "FL",

	[SNDRV_CHMAP_FR]	= "FR",

	[SNDRV_CHMAP_FC]	= "FC",

	[SNDRV_CHMAP_LFE]	= "LFE",

	[SNDRV_CHMAP_RL]	= "RL",

	[SNDRV_CHMAP_RR]	= "RR",

	[SNDRV_CHMAP_FLC]	= "FLC",

	[SNDRV_CHMAP_FRC]	= "FRC",

	[SNDRV_CHMAP_RC]	= "RC",

	[SNDRV_CHMAP_SL]	= "SL",

	[SNDRV_CHMAP_SR]	= "SR",

	[SNDRV_CHMAP_TC]	= "TC",

	[SNDRV_CHMAP_TFL]	= "TFL",

	[SNDRV_CHMAP_TFC]	= "TFC",

	[SNDRV_CHMAP_TFR]	= "TFR",

	[SNDRV_CHMAP_TRL]	= "TRL",

	[SNDRV_CHMAP_TRC]	= "TRC",

	[SNDRV_CHMAP_TRR]	= "TRR",

	[SNDRV_CHMAP_TFLC]	= "TFLC",

	[SNDRV_CHMAP_TFRC]	= "TFRC",

	[SNDRV_CHMAP_LLFE]	= "LLFE",

	[SNDRV_CHMAP_RLFE]	= "RLFE",

	[SNDRV_CHMAP_TSL]	= "TSL",

	[SNDRV_CHMAP_TSR]	= "TSR",

	[SNDRV_CHMAP_BC]	= "BC",

	[SNDRV_CHMAP_RLC]	= "RLC",

	[SNDRV_CHMAP_RRC]	= "RRC",

};



/*

 * proc interface for list the supported pcm formats

 */
@@ -97,6 +129,27 @@ static void proc_dump_substream_formats(struct snd_usb_substream *subs, struct s 
			snd_iprintf(buffer, "    Data packet interval: %d us\n",

				    125 * (1 << fp->datainterval));

		snd_iprintf(buffer, "    Bits: %d\n", fp->fmt_bits);



		if (fp->dsd_raw)

			snd_iprintf(buffer, "    DSD raw: DOP=%d, bitrev=%d\n",

				    fp->dsd_dop, fp->dsd_bitrev);



		if (fp->chmap) {

			const struct snd_pcm_chmap_elem *map = fp->chmap;

			int c;



			snd_iprintf(buffer, "    Channel map:");

			for (c = 0; c < map->channels; c++) {

				if (map->map[c] >= sizeof(channel_labels) ||

				    !channel_labels[map->map[c]])

					snd_iprintf(buffer, " --");

				else

					snd_iprintf(buffer, " %s",

						    channel_labels[map->map[c]]);

			}

			snd_iprintf(buffer, "\n");

		}



		// snd_iprintf(buffer, "    Max Packet Size = %d\n", fp->maxpacksize);

		// snd_iprintf(buffer, "    EP Attribute = %#x\n", fp->attributes);

	}