From bf990c10231937c0f51e5da5558e08cf5adc6a78 Mon Sep 17 00:00:00 2001
From: Ai Chao <aichao@kylinos.cn>
Date: Thu, 10 Nov 2022 14:34:52 +0800
Subject: [PATCH] ALSA: usb-audio: add quirk to fix Hamedal C20 disconnect issue
Git-commit: bf990c10231937c0f51e5da5558e08cf5adc6a78
Patch-mainline: v6.1-rc5
References: git-fixes
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>
---
sound/usb/endpoint.c | 3 ++-
sound/usb/quirks.c | 2 ++
sound/usb/usbaudio.h | 3 +++
3 files changed, 7 insertions(+), 1 deletion(-)
diff --git a/sound/usb/endpoint.c b/sound/usb/endpoint.c
index d0b8d61d1d22..310cd6fb0038 100644
--- a/sound/usb/endpoint.c
+++ b/sound/usb/endpoint.c
@@ -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) {
diff --git a/sound/usb/quirks.c b/sound/usb/quirks.c
index aedc3987a4cf..0f4dd3503a6a 100644
--- a/sound/usb/quirks.c
+++ b/sound/usb/quirks.c
@@ -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 */
diff --git a/sound/usb/usbaudio.h b/sound/usb/usbaudio.h
index 2c6575029b1c..e97141ef730a 100644
--- a/sound/usb/usbaudio.h
+++ b/sound/usb/usbaudio.h
@@ -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 */
--
2.35.3