ALSA: usb-audio: add clock quirk for Motu 1248
PATCH 1/1 ALSA: usb-audio: add clock quirk for Motu 1248
The Motu 1248 (and probably other older Motu AVB interfaces) take more than 2 seconds to switch clock. During the clock switching process the device return that the clock is not valid. This is similar to what already implemented for the Microbook II interface. Add the Motu 1248 usb id to the existing Motu quirk.
Signed-off-by Nicola Lunghi <[email protected]>
--- sound/usb/clock.c | 15 +++++++++++---- 1 file changed, 11 insertions(+), 4 deletions(-)
sound/usb/clock.c +11 -4
@@ -208,11 +208,18 @@ static bool uac_clock_source_is_valid_quirk(struct snd_usb_audio *chip, }/* -* MOTU MicroBook IIc -* Sample rate changes takes more than 2 seconds for this device. Clock -* validity request returns false during that period. +* Quirk for older MOTU AVB / hybrid interfaces +* +* These devices take more than 2 seconds to switch sample rate or +* clock source. During this period the clock validity request +* returns false, causing ALSA to fail prematurely. +* +* Affected models (all use vendor 0x07fd): +* - MicroBook IIc → 0x0004 +* - 1248, 624, 8A, UltraLite AVB, 8M, 16A, ... → 0x0005 */ -if (chip->usb_id ==USB_ID (0x07fd ,0x0004 )) { +if (chip->usb_id ==USB_ID (0x07fd ,0x0004 ) ||/* MicroBook IIc */ + chip->usb_id ==USB_ID (0x07fd ,0x0005 )) {/* 1248 / 624 / 8A / UltraLite AVB / ... */ count =0 ;while ((!ret) && (count <50 )) {
Signature · 1 line
2.51.0
Quoted 8 lines · Nicola Lunghi
The Motu 1248 (and probably other older Motu AVB interfaces) take more than 2 seconds to switch clock. During the clock switching process the device return that the clock is not valid. This is similar to what already implemented for the Microbook II interface. Add the Motu 1248 usb id to the existing Motu quirk.
Signed-off-by Nicola Lunghi <[email protected]>
Applied now. Thanks.
Takashi