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| author | Jorge Sanjuan <jorge.sanjuan@codethink.co.uk> | 2018-05-11 16:25:35 +0100 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2018-05-15 07:29:10 +0200 |
| commit | c99f0802e42fcd38e84ee4d306691805ebed204f (patch) | |
| tree | 7ab505bdf74f8977c919b52934d4358f7c5faccc /sound/usb/stream.c | |
| parent | 2f0d520a1a73555ac51c19cd494493f60b4c1cea (diff) | |
| download | linux-c99f0802e42fcd38e84ee4d306691805ebed204f.tar.bz2 | |
ALSA: usb-audio: Use Class Specific EP for UAC3 devices.
bmAtributes offset doesn't exist in the UAC3 CS_EP descriptor.
Hence, checking for pitch control as if it was UAC2 doesn't make
any sense. Use the defined UAC3 offsets instead.
Fixes: 9a2fe9b801f5 ("ALSA: usb: initial USB Audio Device Class 3.0 support")
Signed-off-by: Jorge Sanjuan <jorge.sanjuan@codethink.co.uk>
Reviewed-by: Ruslan Bilovol <ruslan.bilovol@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/usb/stream.c')
| -rw-r--r-- | sound/usb/stream.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/sound/usb/stream.c b/sound/usb/stream.c index 956be9f7c72a..5ed334575fc7 100644 --- a/sound/usb/stream.c +++ b/sound/usb/stream.c @@ -576,7 +576,7 @@ static int parse_uac_endpoint_attributes(struct snd_usb_audio *chip, if (protocol == UAC_VERSION_1) { attributes = csep->bmAttributes; - } else { + } else if (protocol == UAC_VERSION_2) { struct uac2_iso_endpoint_descriptor *csep2 = (struct uac2_iso_endpoint_descriptor *) csep; @@ -585,6 +585,13 @@ static int parse_uac_endpoint_attributes(struct snd_usb_audio *chip, /* emulate the endpoint attributes of a v1 device */ if (csep2->bmControls & UAC2_CONTROL_PITCH) attributes |= UAC_EP_CS_ATTR_PITCH_CONTROL; + } else { /* UAC_VERSION_3 */ + struct uac3_iso_endpoint_descriptor *csep3 = + (struct uac3_iso_endpoint_descriptor *) csep; + + /* emulate the endpoint attributes of a v1 device */ + if (le32_to_cpu(csep3->bmControls) & UAC2_CONTROL_PITCH) + attributes |= UAC_EP_CS_ATTR_PITCH_CONTROL; } return attributes; |