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ALSA: usb-audio: Correct surround channels in UAC1 channel map

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commit b7b7e1ab7619deb3b299b5e5c619c3e6f183a12d upstream.

USB-audio driver puts SNDRV_CHMAP_SL and _SR as left and right
surround channels for UAC1 channel map, respectively.  But they should
have been SNDRV_CHMAP_RL and _RR; the current value *_SL and _SR are
rather "side" channels, not "surround".  I guess I took those
mistakenly when I read the spec mentioning "surround left".

This patch corrects those entries to be the right channels.

Suggested-by: Sylvain BERTRAND <[email protected]>
Closes: https://lore.kernel.orgZ/qIyJD8lhd8hFhlC@freedom
Fixes: 04324ccc75 ("ALSA: usb-audio: add channel map support")
Cc: <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Takashi Iwai <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
This commit is contained in:
Takashi Iwai 2024-07-31 16:19:41 +02:00 • committed by Greg Kroah-Hartman
commit 479335789d
1 changed files with 2 additions and 2 deletions
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4
sound/usb/stream.c
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@ -245,8 +245,8 @@ static struct snd_pcm_chmap_elem *convert_chmap(int channels, unsigned int bits,
SNDRV_CHMAP_FR, /* right front */
SNDRV_CHMAP_FC, /* center front */
SNDRV_CHMAP_LFE, /* LFE */
SNDRV_CHMAP_SL, /* left surround */
SNDRV_CHMAP_SR, /* right surround */
SNDRV_CHMAP_RL, /* left surround */
SNDRV_CHMAP_RR, /* right surround */
SNDRV_CHMAP_FLC, /* left of center */
SNDRV_CHMAP_FRC, /* right of center */
SNDRV_CHMAP_RC, /* surround */