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Commit 71066945 authored by Jorge Sanjuan's avatar Jorge Sanjuan Committed by Takashi Iwai
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ALSA: usb-audio: UAC3: Parse Input Terminal number of channels. 



Obtain the number of channels for the Input Terminal from the
Logical Cluster Descriptor. This achieves a useful minimal parsing
of this unit so it can be used in other units in the topology.

Signed-off-by: default avatarJorge Sanjuan <jorge.sanjuan@codethink.co.uk>
Reviewed-by: default avatarRuslan Bilovol <ruslan.bilovol@gmail.com>
Tested-by: default avatarRuslan Bilovol <ruslan.bilovol@gmail.com>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent 1d38f5d8

sound/usb/mixer.c

+6 −2
Original line number Diff line number Diff line
@@ -902,8 +902,12 @@ static int check_input_term(struct mixer_build *state, int id, 
				term->id = id;

				term->type = le16_to_cpu(d->wTerminalType);



				/* REVISIT: UAC3 IT doesn't have channels/cfg */

				term->channels = 0;

				err = get_cluster_channels_v3(state, le16_to_cpu(d->wClusterDescrID));

				if (err < 0)

					return err;

				term->channels = err;



				/* REVISIT: UAC3 IT doesn't have channels cfg */

				term->chconfig = 0;



				term->name = le16_to_cpu(d->wTerminalDescrStr);