Hi all,
this got a somewhat lengthy bugreport. Some words to my environment:
These traces were produced on a Core2Duo (in amd64 mode) with a ASUS P5B board
and
vanilla Linux 2.6.25.8. I observed the same behavior on a 32bit QuadCore with a
Logitech 9000 and Linux 2.6.25.6.
This is the trace from my app. As you can see, the main thread (17460) queues
the
buffer, starts the grabbing thread right after the STREAMON and queries
brightness, contrast, hue and saturation.
The grabbing thread tries to dequeue a buffer and hangs:
-> Thread=17460 ioctl=c058560f QBUF
<- Thread=17460 ioctl=c058560f ret=0 QBUF
-> Thread=17460 ioctl=c058560f QBUF
<- Thread=17460 ioctl=c058560f ret=0 QBUF
-> Thread=17460 ioctl=40045612 STREAMON
<- Thread=17460 ioctl=40045612 ret=0 STREAMON
-> Thread=17460 ioctl=c0445624 QUERYCTRL
-> Thread=17487 ioctl=c0585611 DQBUF
<- Thread=17460 ioctl=c0445624 ret=0 QUERYCTRL
-> Thread=17460 ioctl=c008561b G_CTRL
<- Thread=17460 ioctl=c008561b ret=0 G_CTRL
-> Thread=17460 ioctl=c0445624 QUERYCTRL
<- Thread=17460 ioctl=c0445624 ret=0 QUERYCTRL
-> Thread=17460 ioctl=c008561b G_CTRL
<- Thread=17460 ioctl=c008561b ret=0 G_CTRL
-> Thread=17460 ioctl=c0445624 QUERYCTRL
<- Thread=17460 ioctl=c0445624 ret=0 QUERYCTRL
-> Thread=17460 ioctl=c008561b G_CTRL
<- Thread=17460 ioctl=c008561b ret=0 G_CTRL
-> Thread=17460 ioctl=c0445624 QUERYCTRL
<- Thread=17460 ioctl=c0445624 ret=0 QUERYCTRL
-> Thread=17460 ioctl=c008561b G_CTRL
<- Thread=17460 ioctl=c008561b ret=0 G_CTRL
Trace from UVC driver:
Jun 26 20:31:20 Rincewind kernel: uvcvideo: uvc_v4l2_ioctl
Jun 26 20:31:20 Rincewind kernel: v4l2 ioctl VIDIOC_QBUF, dir=rw (0xc058560f)
Jun 26 20:31:20 Rincewind kernel: uvcvideo: Queuing buffer 0.
Jun 26 20:31:20 Rincewind kernel: uvcvideo: uvc_v4l2_ioctl
Jun 26 20:31:20 Rincewind kernel: v4l2 ioctl VIDIOC_QBUF, dir=rw (0xc058560f)
Jun 26 20:31:20 Rincewind kernel: uvcvideo: Queuing buffer 1.
Jun 26 20:31:20 Rincewind kernel: uvcvideo: uvc_v4l2_ioctl
Jun 26 20:31:20 Rincewind kernel: v4l2 ioctl VIDIOC_STREAMON, dir=-w
(0x40045612)
Jun 26 20:31:20 Rincewind kernel: uvcvideo: uvc_v4l2_ioctl
Jun 26 20:31:20 Rincewind kernel: v4l2 ioctl VIDIOC_QUERYCTRL, dir=rw
(0xc0445624)
Jun 26 20:31:20 Rincewind kernel: uvcvideo: uvc_v4l2_ioctl
Jun 26 20:31:20 Rincewind kernel: v4l2 ioctl VIDIOC_G_CTRL, dir=rw (0xc008561b)
Jun 26 20:31:20 Rincewind kernel: uvcvideo: uvc_v4l2_ioctl
Jun 26 20:31:20 Rincewind kernel: v4l2 ioctl VIDIOC_QUERYCTRL, dir=rw
(0xc0445624)
Jun 26 20:31:20 Rincewind kernel: uvcvideo: uvc_v4l2_ioctl
Jun 26 20:31:20 Rincewind kernel: v4l2 ioctl VIDIOC_DQBUF, dir=rw (0xc0585611)
Jun 26 20:31:20 Rincewind kernel: uvcvideo: uvc_v4l2_ioctl
Jun 26 20:31:20 Rincewind kernel: v4l2 ioctl VIDIOC_G_CTRL, dir=rw (0xc008561b)
Jun 26 20:31:20 Rincewind kernel: uvcvideo: uvc_v4l2_ioctl
Jun 26 20:31:20 Rincewind kernel: v4l2 ioctl VIDIOC_QUERYCTRL, dir=rw
(0xc0445624)
Jun 26 20:31:20 Rincewind kernel: uvcvideo: uvc_v4l2_ioctl
Jun 26 20:31:20 Rincewind kernel: v4l2 ioctl VIDIOC_G_CTRL, dir=rw (0xc008561b)
Jun 26 20:31:20 Rincewind kernel: uvcvideo: uvc_v4l2_ioctl
Jun 26 20:31:20 Rincewind kernel: v4l2 ioctl VIDIOC_QUERYCTRL, dir=rw
(0xc0445624)
Jun 26 20:31:20 Rincewind kernel: uvcvideo: uvc_v4l2_ioctl
Jun 26 20:31:20 Rincewind kernel: v4l2 ioctl VIDIOC_G_CTRL, dir=rw (0xc008561b)
A second test after module unloading and replugging of the camera:
Here the dequeing of the first buffer succeedes, although the MJPEG
decoder complains about garbage. The second dqbuf operation hangs now.
-> Thread=17989 ioctl=15 QBUF
<- Thread=17989 ioctl=15 ret=0 QBUF
-> Thread=17989 ioctl=15 QBUF
<- Thread=17989 ioctl=15 ret=0 QBUF
-> Thread=17989 ioctl=18 STREAMON
<- Thread=17989 ioctl=18 ret=0 STREAMON
-> Thread=18010 ioctl=17 DQBUF
-> Thread=17989 ioctl=36 QUERYCTRL
<- Thread=17989 ioctl=36 ret=0 QUERYCTRL
-> Thread=17989 ioctl=27 G_CTRL
<- Thread=17989 ioctl=27 ret=0 G_CTRL
-> Thread=17989 ioctl=36 QUERYCTRL
<- Thread=17989 ioctl=36 ret=0 QUERYCTRL
-> Thread=17989 ioctl=27 G_CTRL
<- Thread=17989 ioctl=27 ret=0 G_CTRL
-> Thread=17989 ioctl=36 QUERYCTRL
<- Thread=17989 ioctl=36 ret=0 QUERYCTRL
-> Thread=17989 ioctl=27 G_CTRL
<- Thread=17989 ioctl=27 ret=0 G_CTRL
-> Thread=17989 ioctl=36 QUERYCTRL
<- Thread=17989 ioctl=36 ret=0 QUERYCTRL
-> Thread=17989 ioctl=27 G_CTRL
<- Thread=17989 ioctl=27 ret=0 G_CTRL
<- Thread=18010 ioctl=17 ret=0 DQBUF
Calling MJPEG Decoder: 1
MJPEG: target size != image size!
-> Thread=18010 ioctl=15 QBUF
<- Thread=18010 ioctl=15 ret=0 QBUF
-> Thread=18010 ioctl=17 DQBUF
The associated UVC trace:
Jun 26 20:47:23 Rincewind kernel: v4l2 ioctl VIDIOC_QUERYCTRL, dir=rw
(0xc0445624)
Jun 26 20:47:23 Rincewind kernel: uvcvideo: uvc_v4l2_ioctl
Jun 26 20:47:23 Rincewind kernel: v4l2 ioctl VIDIOC_G_CTRL, dir=rw (0xc008561b)
Jun 26 20:47:23 Rincewind kernel: uvcvideo: Frame complete (EOF found).
Jun 26 20:47:23 Rincewind kernel: uvcvideo: EOF in empty payload.
Jun 26 20:47:23 Rincewind kernel: uvcvideo: Dequeuing buffer 0 (3, 4156 bytes).
Jun 26 20:47:23 Rincewind kernel: uvcvideo: uvc_v4l2_ioctl
Jun 26 20:47:23 Rincewind kernel: v4l2 ioctl VIDIOC_QBUF, dir=rw (0xc058560f)
Jun 26 20:47:23 Rincewind kernel: uvcvideo: Queuing buffer 0.
Jun 26 20:47:23 Rincewind kernel: uvcvideo: uvc_v4l2_ioctl
Jun 26 20:47:23 Rincewind kernel: v4l2 ioctl VIDIOC_DQBUF, dir=rw (0xc0585611)
The size of the first frame. The first frame is always 4156 bytes long. Even if
the driver does not block.
$ ls -la /tmp/[EMAIL PROTECTED]
-rw-r--r-- 1 gjasny gjasny 4156 26. Jun 21:01 /tmp/[EMAIL PROTECTED]
$ hexdump /tmp/[EMAIL PROTECTED]
0000000 d8ff e0ff 1000 464a 4649 0100 0101 0000
0000010 0000 0000 dbff 4300 0500 0403 0404 0503
0000020 0404 0604 0505 0806 080d 0708 0807 0b0f
0000030 090c 120d 1310 1213 1210 1411 1d17 1418
0000040 1b15 1116 1912 1922 1e1b 201f 2021 1813
0000050 2623 1f23 1d26 2020 ff1f 00db 0143 0605
0000060 0806 0807 080f 0f08 151f 1512 1f1f 1f1f
[...]
One maybe interesting observation: If I reload the module after a
deadlock and let the camera plugged in, the following trace is produced:
A now started luvcview blocks during dqbuf, too (See next trace).
The only way to get a working camera again is to replug the camera.
Jun 26 20:55:57 Rincewind kernel: uvcvideo: Adding mapping Brightness to
control 00000000-0000-0000-0000-000000000101/2.
Jun 26 20:55:57 Rincewind kernel: uvcvideo: Adding mapping Contrast to control
00000000-0000-0000-0000-000000000101/3.
Jun 26 20:55:57 Rincewind kernel: uvcvideo: Adding mapping Hue to control
00000000-0000-0000-0000-000000000101/6.
Jun 26 20:55:57 Rincewind kernel: uvcvideo: Adding mapping Saturation to
control 00000000-0000-0000-0000-000000000101/7.
Jun 26 20:55:57 Rincewind kernel: uvcvideo: Adding mapping Sharpness to control
00000000-0000-0000-0000-000000000101/8.
Jun 26 20:55:57 Rincewind kernel: uvcvideo: Adding mapping Gamma to control
00000000-0000-0000-0000-000000000101/9.
Jun 26 20:55:57 Rincewind kernel: uvcvideo: Adding mapping Backlight
Compensation to control 00000000-0000-0000-0000-000000000101/1.
Jun 26 20:55:57 Rincewind kernel: uvcvideo: Adding mapping Gain to control
00000000-0000-0000-0000-000000000101/4.
Jun 26 20:55:57 Rincewind kernel: uvcvideo: Adding mapping Power Line Frequency
to control 00000000-0000-0000-0000-000000000101/5.
Jun 26 20:55:57 Rincewind kernel: uvcvideo: Adding mapping Hue, Auto to control
00000000-0000-0000-0000-000000000101/16.
Jun 26 20:55:57 Rincewind kernel: uvcvideo: Adding mapping Exposure, Auto to
control 00000000-0000-0000-0000-000000000001/2.
Jun 26 20:55:57 Rincewind kernel: uvcvideo: Adding mapping Exposure, Auto
Priority to control 00000000-0000-0000-0000-000000000001/3.
Jun 26 20:55:57 Rincewind kernel: uvcvideo: Adding mapping Exposure (Absolute)
to control 00000000-0000-0000-0000-000000000001/4.
Jun 26 20:55:57 Rincewind kernel: uvcvideo: Adding mapping White Balance
Temperature, Auto to control 00000000-0000-0000-0000-000000000101/11.
Jun 26 20:55:57 Rincewind kernel: uvcvideo: Adding mapping White Balance
Temperature to control 00000000-0000-0000-0000-000000000101/10.
Jun 26 20:55:57 Rincewind kernel: uvcvideo: Adding mapping White Balance
Component, Auto to control 00000000-0000-0000-0000-000000000101/13.
Jun 26 20:55:57 Rincewind kernel: uvcvideo: Adding mapping White Balance Blue
Component to control 00000000-0000-0000-0000-000000000101/12.
Jun 26 20:55:57 Rincewind kernel: uvcvideo: Adding mapping White Balance Red
Component to control 00000000-0000-0000-0000-000000000101/12.
Jun 26 20:55:57 Rincewind kernel: uvcvideo: Adding mapping Focus (absolute) to
control 00000000-0000-0000-0000-000000000001/6.
Jun 26 20:55:57 Rincewind kernel: uvcvideo: Adding mapping Focus, Auto to
control 00000000-0000-0000-0000-000000000001/8.
Jun 26 20:55:57 Rincewind kernel: uvcvideo: Probing known UVC device 1.1
(045e:00f8)
Jun 26 20:55:57 Rincewind kernel: uvcvideo: Found format MJPEG.
Jun 26 20:55:57 Rincewind kernel: uvcvideo: - 352x288 (30.0 fps)
Jun 26 20:55:57 Rincewind kernel: uvcvideo: - 1600x1200 (7.5 fps)
Jun 26 20:55:57 Rincewind kernel: uvcvideo: - 1280x1024 (7.5 fps)
Jun 26 20:55:57 Rincewind kernel: uvcvideo: - 1024x768 (7.5 fps)
Jun 26 20:55:57 Rincewind kernel: uvcvideo: - 800x600 (30.0 fps)
Jun 26 20:55:57 Rincewind kernel: uvcvideo: - 640x480 (30.0 fps)
Jun 26 20:55:57 Rincewind kernel: uvcvideo: - 320x240 (30.0 fps)
Jun 26 20:55:57 Rincewind kernel: uvcvideo: - 176x144 (30.0 fps)
Jun 26 20:55:57 Rincewind kernel: uvcvideo: - 160x120 (30.0 fps)
Jun 26 20:55:57 Rincewind kernel: uvcvideo: Found a Status endpoint (addr 83).
Jun 26 20:55:57 Rincewind kernel: uvcvideo: Found UVC 1.00 device Microsoft¿
LifeCam NX-6000 (045e:00f8)
Jun 26 20:55:57 Rincewind kernel: uvcvideo: Added control
00000000-0000-0000-0000-000000000101/2 to device 1.1 entity 5
Jun 26 20:55:57 Rincewind kernel: uvcvideo: Added control
00000000-0000-0000-0000-000000000101/3 to device 1.1 entity 5
Jun 26 20:55:57 Rincewind kernel: uvcvideo: Added control
00000000-0000-0000-0000-000000000101/6 to device 1.1 entity 5
Jun 26 20:55:57 Rincewind kernel: uvcvideo: Added control
00000000-0000-0000-0000-000000000101/7 to device 1.1 entity 5
Jun 26 20:55:57 Rincewind kernel: uvcvideo: Added control
00000000-0000-0000-0000-000000000101/8 to device 1.1 entity 5
Jun 26 20:55:57 Rincewind kernel: uvcvideo: Added control
00000000-0000-0000-0000-000000000101/9 to device 1.1 entity 5
Jun 26 20:55:57 Rincewind kernel: uvcvideo: Added control
00000000-0000-0000-0000-000000000101/1 to device 1.1 entity 5
Jun 26 20:55:57 Rincewind kernel: uvcvideo: Added control
00000000-0000-0000-0000-000000000101/5 to device 1.1 entity 5
Jun 26 20:55:57 Rincewind kernel: uvcvideo: Added control
00000000-0000-0000-0000-000000000101/11 to device 1.1 entity 5
Jun 26 20:55:57 Rincewind kernel: uvcvideo: Added control
00000000-0000-0000-0000-000000000101/10 to device 1.1 entity 5
Jun 26 20:55:57 Rincewind kernel: uvcvideo: Scanning UVC chain: OT 3 <- PU 5 <-
SU 4 <- IT 1
Jun 26 20:55:57 Rincewind kernel: uvcvideo: Found a valid video chain (1 -> 3).
Jun 26 20:55:57 Rincewind kernel: uvcvideo: Failed to query (135) UVC control 1
(unit 0) : -32 (exp. 26).
Jun 26 20:55:57 Rincewind kernel: input: Microsoft¿ LifeCam NX-6000 as
/devices/pci0000:00/0000:00:1d.7/usb2/2-1/2-1.1/2-1.1:1.0/input/input11
Jun 26 20:55:57 Rincewind kernel: uvcvideo: uvc_v4l2_open
Jun 26 20:55:57 Rincewind kernel: uvcvideo: uvc_v4l2_ioctl
Jun 26 20:55:57 Rincewind kernel: v4l2 ioctl VIDIOC_QUERYCAP, dir=r-
(0x80685600)
Jun 26 20:55:57 Rincewind kernel: uvcvideo: uvc_v4l2_ioctl
Jun 26 20:55:57 Rincewind kernel: v4l1 ioctl VIDIOCGCAP, dir=r- (0x803c7601)
Jun 26 20:55:57 Rincewind kernel: v4l2 ioctl VIDIOC_QUERYCAP, dir=r-
(0x80685600)
Jun 26 20:55:57 Rincewind kernel: v4l2 ioctl VIDIOC_ENUMINPUT, dir=rw
(0xc050561a)
Jun 26 20:55:57 Rincewind kernel: v4l2 ioctl VIDIOC_ENUMINPUT, dir=rw
(0xc050561a)
Jun 26 20:55:57 Rincewind kernel: v4l2 ioctl VIDIOC_ENUM_FMT, dir=rw
(0xc0405602)
Jun 26 20:55:57 Rincewind kernel: v4l2 ioctl VIDIOC_TRY_FMT, dir=rw (0xc0d05640)
Jun 26 20:55:57 Rincewind kernel: uvcvideo: Trying format 0x47504a4d (MJPG):
10000x10000.
Jun 26 20:55:57 Rincewind kernel: uvcvideo: Using default frame interval
133333.3 us (7.5 fps).
Jun 26 20:55:57 Rincewind kernel: uvcvideo: uvc_v4l2_release
Jun 26 20:55:58 Rincewind kernel: uvcvideo: UVC device initialized.
Jun 26 20:55:58 Rincewind kernel: usbcore: registered new interface driver
uvcvideo
Jun 26 20:55:58 Rincewind kernel: USB Video Class driver (SVN r217)
luvcview:
Jun 26 20:57:15 Rincewind kernel: uvcvideo: uvc_v4l2_open
Jun 26 20:57:15 Rincewind kernel: uvcvideo: uvc_v4l2_ioctl
Jun 26 20:57:15 Rincewind kernel: v4l2 ioctl VIDIOC_QUERYCAP, dir=r-
(0x80685600)
Jun 26 20:57:15 Rincewind kernel: uvcvideo: uvc_v4l2_ioctl
Jun 26 20:57:15 Rincewind kernel: v4l2 ioctl VIDIOC_S_FMT, dir=rw (0xc0d05605)
Jun 26 20:57:15 Rincewind kernel: uvcvideo: Trying format 0x47504a4d (MJPG):
320x240.
Jun 26 20:57:15 Rincewind kernel: uvcvideo: Using default frame interval
33333.3 us (30.0 fps).
Jun 26 20:57:15 Rincewind kernel: uvcvideo: uvc_v4l2_ioctl
Jun 26 20:57:15 Rincewind kernel: v4l2 ioctl VIDIOC_S_PARM, dir=rw (0xc0cc5616)
Jun 26 20:57:15 Rincewind kernel: uvcvideo: Setting frame interval to 1/15
(666666).
Jun 26 20:57:15 Rincewind kernel: uvcvideo: uvc_v4l2_ioctl
Jun 26 20:57:15 Rincewind kernel: v4l2 ioctl VIDIOC_REQBUFS, dir=rw (0xc0145608)
Jun 26 20:57:15 Rincewind kernel: uvcvideo: uvc_v4l2_ioctl
Jun 26 20:57:15 Rincewind kernel: v4l2 ioctl VIDIOC_QUERYBUF, dir=rw
(0xc0585609)
Jun 26 20:57:15 Rincewind kernel: uvcvideo: uvc_v4l2_mmap
Jun 26 20:57:15 Rincewind kernel: uvcvideo: uvc_v4l2_ioctl
Jun 26 20:57:15 Rincewind kernel: v4l2 ioctl VIDIOC_QUERYBUF, dir=rw
(0xc0585609)
Jun 26 20:57:15 Rincewind kernel: uvcvideo: uvc_v4l2_mmap
Jun 26 20:57:15 Rincewind kernel: uvcvideo: uvc_v4l2_ioctl
Jun 26 20:57:15 Rincewind kernel: v4l2 ioctl VIDIOC_QUERYBUF, dir=rw
(0xc0585609)
Jun 26 20:57:15 Rincewind kernel: uvcvideo: uvc_v4l2_mmap
Jun 26 20:57:15 Rincewind kernel: uvcvideo: uvc_v4l2_ioctl
Jun 26 20:57:15 Rincewind kernel: v4l2 ioctl VIDIOC_QUERYBUF, dir=rw
(0xc0585609)
Jun 26 20:57:15 Rincewind kernel: uvcvideo: uvc_v4l2_mmap
Jun 26 20:57:15 Rincewind kernel: uvcvideo: uvc_v4l2_ioctl
Jun 26 20:57:15 Rincewind kernel: v4l2 ioctl VIDIOC_QBUF, dir=rw (0xc058560f)
Jun 26 20:57:15 Rincewind kernel: uvcvideo: Queuing buffer 0.
Jun 26 20:57:15 Rincewind kernel: uvcvideo: uvc_v4l2_ioctl
Jun 26 20:57:15 Rincewind kernel: v4l2 ioctl VIDIOC_QBUF, dir=rw (0xc058560f)
Jun 26 20:57:15 Rincewind kernel: uvcvideo: Queuing buffer 1.
Jun 26 20:57:15 Rincewind kernel: uvcvideo: uvc_v4l2_ioctl
Jun 26 20:57:15 Rincewind kernel: v4l2 ioctl VIDIOC_QBUF, dir=rw (0xc058560f)
Jun 26 20:57:15 Rincewind kernel: uvcvideo: Queuing buffer 2.
Jun 26 20:57:15 Rincewind kernel: uvcvideo: uvc_v4l2_ioctl
Jun 26 20:57:15 Rincewind kernel: v4l2 ioctl VIDIOC_QBUF, dir=rw (0xc058560f)
Jun 26 20:57:15 Rincewind kernel: uvcvideo: Queuing buffer 3.
Jun 26 20:57:16 Rincewind kernel: uvcvideo: uvc_v4l2_ioctl
Jun 26 20:57:16 Rincewind kernel: v4l2 ioctl VIDIOC_STREAMON, dir=-w
(0x40045612)
Jun 26 20:57:16 Rincewind kernel: uvcvideo: uvc_v4l2_ioctl
Jun 26 20:57:16 Rincewind kernel: v4l2 ioctl VIDIOC_DQBUF, dir=rw (0xc0585611)
You might find the lsusb of the camera helpful:
Bus 002 Device 007: ID 045e:00f8 Microsoft Corp. LifeCam NX-6000.
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 239 Miscellaneous Device
bDeviceSubClass 2 ?
bDeviceProtocol 1 Interface Association
bMaxPacketSize0 64
idVendor 0x045e Microsoft Corp.
idProduct 0x00f8 LifeCam NX-6000.
bcdDevice 1.00
iManufacturer 1
iProduct 2 Microsoft® LifeCam NX-6000
iSerial 0
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 555
bNumInterfaces 4
bConfigurationValue 1
iConfiguration 0
bmAttributes 0x80
(Bus Powered)
MaxPower 500mA
Interface Association:
bLength 8
bDescriptorType 11
bFirstInterface 0
bInterfaceCount 2
bFunctionClass 14 Video
bFunctionSubClass 3 Video Interface Collection
bFunctionProtocol 0
iFunction 2 Microsoft® LifeCam NX-6000
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 14 Video
bInterfaceSubClass 1 Video Control
bInterfaceProtocol 0
iInterface 2 Microsoft® LifeCam NX-6000
VideoControl Interface Descriptor:
bLength 13
bDescriptorType 36
bDescriptorSubtype 1 (HEADER)
bcdUVC 1.00
wTotalLength 57
dwClockFrequency 30.000000MHz
bInCollection 1
baInterfaceNr( 0) 1
VideoControl Interface Descriptor:
bLength 17
bDescriptorType 36
bDescriptorSubtype 2 (INPUT_TERMINAL)
bTerminalID 1
wTerminalType 0x0201 Camera Sensor
bAssocTerminal 0
iTerminal 0
wObjectiveFocalLengthMin 0
wObjectiveFocalLengthMax 0
wOcularFocalLength 0
bControlSize 2
bmControls 0x00000a00
Zoom (Absolute)
PanTilt (Absolute)
VideoControl Interface Descriptor:
bLength 9
bDescriptorType 36
bDescriptorSubtype 3 (OUTPUT_TERMINAL)
bTerminalID 3
wTerminalType 0x0101 USB Streaming
bAssocTerminal 0
bSourceID 5
iTerminal 0
VideoControl Interface Descriptor:
bLength 7
bDescriptorType 36
bDescriptorSubtype 4 (SELECTOR_UNIT)
bUnitID 4
bNrInPins 1
baSource( 0) 1
iSelector 0
VideoControl Interface Descriptor:
bLength 11
bDescriptorType 36
bDescriptorSubtype 5 (PROCESSING_UNIT)
Warning: Descriptor too short
bUnitID 5
bSourceID 4
wMaxMultiplier 0
bControlSize 2
bmControls 0x0000557f
Brightness
Contrast
Hue
Saturation
Sharpness
Gamma
White Balance Temperature
Backlight Compensation
Power Line Frequency
White Balance Temperature, Auto
Digital Multiplier
iProcessing 0
bmVideoStandards 0x68
SECAM - 625/50
PAL - 525/60
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0008 1x 8 bytes
bInterval 16
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 0
bNumEndpoints 0
bInterfaceClass 14 Video
bInterfaceSubClass 2 Video Streaming
bInterfaceProtocol 0
iInterface 0
VideoStreaming Interface Descriptor:
bLength 14
bDescriptorType 36
bDescriptorSubtype 1 (INPUT_HEADER)
bNumFormats 1
wTotalLength 295
bEndPointAddress 129
bmInfo 0
bTerminalLink 3
bStillCaptureMethod 0
bTriggerSupport 0
bTriggerUsage 0
bControlSize 1
bmaControls( 0) 11
VideoStreaming Interface Descriptor:
bLength 11
bDescriptorType 36
bDescriptorSubtype 6 (FORMAT_MJPEG)
bFormatIndex 1
bNumFrameDescriptors 9
bFlags 1
Fixed-size samples: Yes
bDefaultFrameIndex 1
bAspectRatioX 0
bAspectRatioY 0
bmInterlaceFlags 0x00
Interlaced stream or variable: No
Fields per frame: 1 fields
Field 1 first: No
Field pattern: Field 1 only
bCopyProtect 0
VideoStreaming Interface Descriptor:
bLength 30
bDescriptorType 36
bDescriptorSubtype 7 (FRAME_MJPEG)
bFrameIndex 1
bmCapabilities 0x00
Still image unsupported
wWidth 352
wHeight 288
dwMinBitRate 48660480
dwMaxBitRate 48660480
dwMaxVideoFrameBufferSize 202752
dwDefaultFrameInterval 333333
bFrameIntervalType 1
dwFrameInterval( 0) 333333
VideoStreaming Interface Descriptor:
bLength 30
bDescriptorType 36
bDescriptorSubtype 7 (FRAME_MJPEG)
bFrameIndex 2
bmCapabilities 0x00
Still image unsupported
wWidth 1600
wHeight 1200
dwMinBitRate 230400000
dwMaxBitRate 230400000
dwMaxVideoFrameBufferSize 3840000
dwDefaultFrameInterval 1333333
bFrameIntervalType 1
dwFrameInterval( 0) 1333333
VideoStreaming Interface Descriptor:
bLength 30
bDescriptorType 36
bDescriptorSubtype 7 (FRAME_MJPEG)
bFrameIndex 3
bmCapabilities 0x00
Still image unsupported
wWidth 1280
wHeight 1024
dwMinBitRate 157286400
dwMaxBitRate 157286400
dwMaxVideoFrameBufferSize 2621440
dwDefaultFrameInterval 1333333
bFrameIntervalType 1
dwFrameInterval( 0) 1333333
VideoStreaming Interface Descriptor:
bLength 30
bDescriptorType 36
bDescriptorSubtype 7 (FRAME_MJPEG)
bFrameIndex 4
bmCapabilities 0x00
Still image unsupported
wWidth 1024
wHeight 768
dwMinBitRate 94371840
dwMaxBitRate 94371840
dwMaxVideoFrameBufferSize 1572864
dwDefaultFrameInterval 1333333
bFrameIntervalType 1
dwFrameInterval( 0) 1333333
VideoStreaming Interface Descriptor:
bLength 30
bDescriptorType 36
bDescriptorSubtype 7 (FRAME_MJPEG)
bFrameIndex 5
bmCapabilities 0x00
Still image unsupported
wWidth 800
wHeight 600
dwMinBitRate 230400000
dwMaxBitRate 230400000
dwMaxVideoFrameBufferSize 960000
dwDefaultFrameInterval 333333
bFrameIntervalType 1
dwFrameInterval( 0) 333333
VideoStreaming Interface Descriptor:
bLength 30
bDescriptorType 36
bDescriptorSubtype 7 (FRAME_MJPEG)
bFrameIndex 6
bmCapabilities 0x00
Still image unsupported
wWidth 640
wHeight 480
dwMinBitRate 147456000
dwMaxBitRate 147456000
dwMaxVideoFrameBufferSize 614400
dwDefaultFrameInterval 333333
bFrameIntervalType 1
dwFrameInterval( 0) 333333
VideoStreaming Interface Descriptor:
bLength 30
bDescriptorType 36
bDescriptorSubtype 7 (FRAME_MJPEG)
bFrameIndex 7
bmCapabilities 0x00
Still image unsupported
wWidth 320
wHeight 240
dwMinBitRate 36864000
dwMaxBitRate 36864000
dwMaxVideoFrameBufferSize 153600
dwDefaultFrameInterval 333333
bFrameIntervalType 1
dwFrameInterval( 0) 333333
VideoStreaming Interface Descriptor:
bLength 30
bDescriptorType 36
bDescriptorSubtype 7 (FRAME_MJPEG)
bFrameIndex 8
bmCapabilities 0x00
Still image unsupported
wWidth 176
wHeight 144
dwMinBitRate 12165120
dwMaxBitRate 12165120
dwMaxVideoFrameBufferSize 50688
dwDefaultFrameInterval 333333
bFrameIntervalType 1
dwFrameInterval( 0) 333333
VideoStreaming Interface Descriptor:
bLength 30
bDescriptorType 36
bDescriptorSubtype 7 (FRAME_MJPEG)
bFrameIndex 9
bmCapabilities 0x00
Still image unsupported
wWidth 160
wHeight 120
dwMinBitRate 9216000
dwMaxBitRate 9216000
dwMaxVideoFrameBufferSize 38400
dwDefaultFrameInterval 333333
bFrameIntervalType 1
dwFrameInterval( 0) 333333
VideoStreaming Interface Descriptor:
bLength 6
bDescriptorType 36
bDescriptorSubtype 13 (COLORFORMAT)
bColorPrimaries 1 (BT.709,sRGB)
bTransferCharacteristics 1 (BT.709)
bMatrixCoefficients 4 (SMPTE 170M (BT.601))
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 1
bNumEndpoints 1
bInterfaceClass 14 Video
bInterfaceSubClass 2 Video Streaming
bInterfaceProtocol 0
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 5
Transfer Type Isochronous
Synch Type Asynchronous
Usage Type Data
wMaxPacketSize 0x13fc 3x 1020 bytes
bInterval 1
Interface Association:
bLength 8
bDescriptorType 11
bFirstInterface 2
bInterfaceCount 2
bFunctionClass 1 Audio
bFunctionSubClass 1 Control Device
bFunctionProtocol 0
iFunction 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 2
bAlternateSetting 0
bNumEndpoints 0
bInterfaceClass 1 Audio
bInterfaceSubClass 1 Control Device
bInterfaceProtocol 0
iInterface 0
AudioControl Interface Descriptor:
bLength 9
bDescriptorType 36
bDescriptorSubtype 1 (HEADER)
bcdADC 1.00
wTotalLength 41
bInCollection 1
baInterfaceNr( 0) 3
AudioControl Interface Descriptor:
bLength 12
bDescriptorType 36
bDescriptorSubtype 2 (INPUT_TERMINAL)
bTerminalID 1
wTerminalType 0x0201 Microphone
bAssocTerminal 0
bNrChannels 1
wChannelConfig 0x0000
iChannelNames 0
iTerminal 0
AudioControl Interface Descriptor:
bLength 9
bDescriptorType 36
bDescriptorSubtype 3 (OUTPUT_TERMINAL)
bTerminalID 2
wTerminalType 0x0101 USB Streaming
bAssocTerminal 0
bSourceID 3
iTerminal 0
AudioControl Interface Descriptor:
bLength 11
bDescriptorType 36
bDescriptorSubtype 6 (FEATURE_UNIT)
bUnitID 3
bSourceID 1
bControlSize 2
bmaControls( 0) 0x00
bmaControls( 0) 0x00
bmaControls( 1) 0x43
bmaControls( 1) 0x00
Mute
Volume
Automatic Gain
iFeature 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 3
bAlternateSetting 0
bNumEndpoints 0
bInterfaceClass 1 Audio
bInterfaceSubClass 2 Streaming
bInterfaceProtocol 0
iInterface 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 3
bAlternateSetting 1
bNumEndpoints 1
bInterfaceClass 1 Audio
bInterfaceSubClass 2 Streaming
bInterfaceProtocol 0
iInterface 0
AudioStreaming Interface Descriptor:
bLength 7
bDescriptorType 36
bDescriptorSubtype 1 (AS_GENERAL)
bTerminalLink 2
bDelay 1 frames
wFormatTag 1 PCM
AudioStreaming Interface Descriptor:
bLength 35
bDescriptorType 36
bDescriptorSubtype 2 (FORMAT_TYPE)
bFormatType 1 (FORMAT_TYPE_I)
bNrChannels 1
bSubframeSize 2
bBitResolution 24
bSamFreqType 9 Discrete
tSamFreq[ 0] 48000
tSamFreq[ 1] 44100
tSamFreq[ 2] 32000
tSamFreq[ 3] 24000
tSamFreq[ 4] 22050
tSamFreq[ 5] 16000
tSamFreq[ 6] 12000
tSamFreq[ 7] 11025
tSamFreq[ 8] 8000
Endpoint Descriptor:
bLength 9
bDescriptorType 5
bEndpointAddress 0x84 EP 4 IN
bmAttributes 5
Transfer Type Isochronous
Synch Type Asynchronous
Usage Type Data
wMaxPacketSize 0x0080 1x 128 bytes
bInterval 4
bRefresh 0
bSynchAddress 0
AudioControl Endpoint Descriptor:
bLength 7
bDescriptorType 37
bDescriptorSubtype 1 (EP_GENERAL)
bmAttributes 0x01
Sampling Frequency
bLockDelayUnits 0 Undefined
wLockDelay 0 Undefined
Device Qualifier (for other device speed):
bLength 10
bDescriptorType 6
bcdUSB 2.00
bDeviceClass 239 Miscellaneous Device
bDeviceSubClass 2 ?
bDeviceProtocol 1 Interface Association
bMaxPacketSize0 8
bNumConfigurations 1
Device Status: 0x0000
(Bus Powered)
Every time the driver is loaded, the driver prints the following line:
uvcvideo: Failed to query (135) UVC control 1 (unit 0) : -32 (exp. 26).
Would it be possible to suppress this query by a camera specific quirk?
Where in the driver should I add what traces?
Is it possible to let a dqbuf ioctl have a time out?
Cheers,
Gregor
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