Re: [PATCH] ALSA: usb-audio: map UAC3 front wide channels in convert_chmap_v3()

From: Takashi Iwai

Date: Thu Mar 12 2026 - 02:40:00 EST


On Wed, 11 Mar 2026 21:00:10 +0100,
Cássio Gabriel wrote:
>
> convert_chmap_v3() translates UAC3 channel relationship values into
> ALSA channel-map positions.
>
> UAC3_CH_FRONT_WIDE_LEFT and UAC3_CH_FRONT_WIDE_RIGHT currently fall
> back to SNDRV_CHMAP_UNKNOWN, although ALSA already provides matching
> channel-map positions via SNDRV_CHMAP_FLW and SNDRV_CHMAP_FRW.
>
> Map these two UAC3 positions to their ALSA equivalents and update the
> comment to clarify that unsupported UAC3 channel relationships remain
> reported as SNDRV_CHMAP_UNKNOWN.
>
> No functional change for other channel relationships.
>
> Signed-off-by: Cássio Gabriel <cassiogabrielcontato@xxxxxxxxx>

Thanks, applied to for-next branch now.


Takashi