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ALSA: usb-audio: add quirk to fix Hamedal C20 disconnect issue 

For Hamedal C20, the current rate is different from the runtime rate,
snd_usb_endpoint stop and close endpoint to resetting rate.
if snd_usb_endpoint close the endpoint, sometimes usb will
disconnect the device.

Signed-off-by: Ai Chao <aichao@kylinos.cn>
Link: https://lore.kernel.org/r/20221110063452.295110-1-aichao@kylinos.cn
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Ai Chao 2022-11-10 14:34:52 +08:00 committed by Takashi Iwai
parent 79e28f2ab3
commit bf990c1023
3 changed files with 7 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
sound/usb/endpoint.c
View File

@ -931,7 +931,8 @@ void snd_usb_endpoint_close(struct snd_usb_audio *chip,
usb_audio_dbg(chip, "Closing EP 0x%x (count %d)\n",
ep->ep_num, ep->opened);
if (!--ep->iface_ref->opened)
if (!--ep->iface_ref->opened &&
!(chip->quirk_flags & QUIRK_FLAG_IFACE_SKIP_CLOSE))
endpoint_set_interface(chip, ep, false);
if (!--ep->opened) {

2
sound/usb/quirks.c
View File

@ -2148,6 +2148,8 @@ static const struct usb_audio_quirk_flags_table quirk_flags_table[] = {
QUIRK_FLAG_GENERIC_IMPLICIT_FB),
DEVICE_FLG(0x2b53, 0x0031, /* Fiero SC-01 (firmware v1.1.0) */
QUIRK_FLAG_GENERIC_IMPLICIT_FB),
DEVICE_FLG(0x0525, 0xa4ad, /* Hamedal C20 usb camero */
QUIRK_FLAG_IFACE_SKIP_CLOSE),
/* Vendor matches */
VENDOR_FLG(0x045e, /* MS Lifecam */

3
sound/usb/usbaudio.h
View File

@ -170,6 +170,8 @@ extern bool snd_usb_skip_validation;
* Apply the generic implicit feedback sync mode (same as implicit_fb=1 option)
* QUIRK_FLAG_SKIP_IMPLICIT_FB
* Don't apply implicit feedback sync mode
* QUIRK_FLAG_IFACE_SKIP_CLOSE
* Don't closed interface during setting sample rate
*/
#define QUIRK_FLAG_GET_SAMPLE_RATE (1U << 0)
@ -191,5 +193,6 @@ extern bool snd_usb_skip_validation;
#define QUIRK_FLAG_SET_IFACE_FIRST (1U << 16)
#define QUIRK_FLAG_GENERIC_IMPLICIT_FB (1U << 17)
#define QUIRK_FLAG_SKIP_IMPLICIT_FB (1U << 18)
#define QUIRK_FLAG_IFACE_SKIP_CLOSE (1U << 19)
#endif /* __USBAUDIO_H */