Commit 5ee20bc7 authored Sep 06, 2015 by Johan Rastén Committed by Takashi Iwai Sep 07, 2015

ALSA: usb-audio: Change internal PCM order

New PCMs will now be added to the end of the chip's PCM list instead of to the
front. This changes the way streams are combined so that the first capture
stream will now be merged with the first playback stream instead of the last.

This fixes a problem with ASUS U7. Cards with one playback stream and cards
without capture streams should be unaffected by this change.

Exception added for M-Audio Audiophile USB (tm) since it seems to have a fix to
swap capture stream numbering in alsa-lib conf/cards/USB-audio.conf

Signed-off-by: Johan Rastén <johan@oljud.se>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

parent 467e1436

sound/usb/stream.c

+9 −1

Original line number	Diff line number	Diff line
		@@ -377,7 +377,15 @@ int snd_usb_add_audio_stream(struct snd_usb_audio *chip,

		snd_usb_init_substream(as, stream, fp);

		/*
		* Keep using head insertion for M-Audio Audiophile USB (tm) which has a
		* fix to swap capture stream order in conf/cards/USB-audio.conf
		*/
		if (chip->usb_id == USB_ID(0x0763, 0x2003))
		list_add(&as->list, &chip->pcm_list);
		else
		list_add_tail(&as->list, &chip->pcm_list);

		chip->pcm_devs++;

		snd_usb_proc_pcm_format_add(as);

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