When a Jieli Technology USB Webcam is connected, the video part works well, but the mic sound is speeded up. On dmesg there are messages about different rates from the runtime rates, warnings about volume resolution and lastly, the log is filled, every 5 seconds, with retire_capture_urb error messages.
The mic works only when ep packet size is set to wMaxPacketSize (normal sound and no more retire_capture_urb error messages). Skipping reading sample rate, fixes the messages about different rates and forcing a volume resolution, fixes warnings about volume range. I have arbitrarily choosed the value (16): I read in a comment that there should be no more than 255 levels, so 4096 (max volume) / 16 = 0-255.
Signed-off-by: Marco Giunta giun7a@gmail.com ---
Could you apply this patch also to the stable tree ?
Thanks, Marco
sound/usb/mixer.c | 7 +++++++ sound/usb/quirks.c | 6 ++++++ 2 files changed, 13 insertions(+)
diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c index 9b713b4a5..20ef12dd8 100644 --- a/sound/usb/mixer.c +++ b/sound/usb/mixer.c @@ -1198,6 +1198,13 @@ static void volume_control_quirks(struct usb_mixer_elem_info *cval, cval->res = 1; } break; + case USB_ID(0x1224, 0x2a25): /* Jieli Technology USB PHY 2.0 */ + if (!strcmp(kctl->id.name, "Mic Capture Volume")) { + usb_audio_info(chip, + "set resolution quirk: cval->res = 16\n"); + cval->res = 16; + } + break; } }
diff --git a/sound/usb/quirks.c b/sound/usb/quirks.c index 326d1b0ea..2263e43fd 100644 --- a/sound/usb/quirks.c +++ b/sound/usb/quirks.c @@ -1534,6 +1534,7 @@ bool snd_usb_get_sample_rate_quirk(struct snd_usb_audio *chip) case USB_ID(0x2912, 0x30c8): /* Audioengine D1 */ case USB_ID(0x413c, 0xa506): /* Dell AE515 sound bar */ case USB_ID(0x046d, 0x084c): /* Logitech ConferenceCam Connect */ + case USB_ID(0x1224, 0x2a25): /* Jieli Technology USB PHY 2.0 */ return true; }
@@ -1874,6 +1875,11 @@ void snd_usb_audioformat_attributes_quirk(struct snd_usb_audio *chip, */ fp->attributes &= ~UAC_EP_CS_ATTR_FILL_MAX; break; + case USB_ID(0x1224, 0x2a25): /* Jieli Technology USB PHY 2.0 */ + /* mic works only when ep packet size is set to wMaxPacketSize */ + fp->attributes |= UAC_EP_CS_ATTR_FILL_MAX; + break; + } }