Re: [PATCH] media: uvcvideo: Add quirk for invalid dev_sof in Logitech C925e
Yunke Cao <[email protected]> Tue, 4 Aug 2026 14:59:33 +0900
| Newsgroups | org.kernel.vger.linux-media |
|---|---|
| Message-ID | <CANqU6FdC-bMfV+jSePTQbonmZG=AWVsB7_PT6Zy4eRQzORrDrw@mail.gmail.com> |
Hi Ricardo, thanks for the review! Attaching the full lsusb output below:
Bus 003 Device 006: ID 046d:085b Logitech, Inc. Logitech Webcam C925e
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 239 Miscellaneous Device
bDeviceSubClass 2
bDeviceProtocol 1 Interface Association
bMaxPacketSize0 64
idVendor 0x046d Logitech, Inc.
idProduct 0x085b
bcdDevice 0.16
iManufacturer 0
iProduct 2 Logitech Webcam C925e
iSerial 1 2F2036AF
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 0x09c7
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 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 14 Video
bInterfaceSubClass 1 Video Control
bInterfaceProtocol 0
iInterface 0
VideoControl Interface Descriptor:
bLength 13
bDescriptorType 36
bDescriptorSubtype 1 (HEADER)
bcdUVC 1.00
wTotalLength 0x00d6
dwClockFrequency 300.000000MHz
bInCollection 1
baInterfaceNr( 0) 1
VideoControl Interface Descriptor:
bLength 18
bDescriptorType 36
bDescriptorSubtype 2 (INPUT_TERMINAL)
bTerminalID 1
wTerminalType 0x0201 Camera Sensor
bAssocTerminal 0
iTerminal 0
wObjectiveFocalLengthMin 0
wObjectiveFocalLengthMax 0
wOcularFocalLength 0
bControlSize 3
bmControls 0x00020a2e
Auto-Exposure Mode
Auto-Exposure Priority
Exposure Time (Absolute)
Focus (Absolute)
Zoom (Absolute)
PanTilt (Absolute)
Focus, Auto
VideoControl Interface Descriptor:
bLength 11
bDescriptorType 36
bDescriptorSubtype 5 (PROCESSING_UNIT)
Warning: Descriptor too short
bUnitID 3
bSourceID 1
wMaxMultiplier 16384
bControlSize 2
bmControls 0x0000175b
Brightness
Contrast
Saturation
Sharpness
White Balance Temperature
Backlight Compensation
Gain
Power Line Frequency
White Balance Temperature, Auto
iProcessing 0
bmVideoStandards 0x1b
None
NTSC - 525/60
SECAM - 625/50
NTSC - 625/50
VideoControl Interface Descriptor:
bLength 27
bDescriptorType 36
bDescriptorSubtype 6 (EXTENSION_UNIT)
bUnitID 6
guidExtensionCode {23e49ed0-1178-4f31-ae52-d2fb8a8d3b48}
bNumControls 10
bNrInPins 1
baSourceID( 0) 3
bControlSize 2
bmControls( 0) 0xff
bmControls( 1) 0x03
iExtension 0
VideoControl Interface Descriptor:
bLength 27
bDescriptorType 36
bDescriptorSubtype 6 (EXTENSION_UNIT)
bUnitID 8
guidExtensionCode {69678ee4-410f-40db-a850-7420d7d8240e}
bNumControls 7
bNrInPins 1
baSourceID( 0) 1
bControlSize 2
bmControls( 0) 0x3b
bmControls( 1) 0x03
iExtension 0
VideoControl Interface Descriptor:
bLength 28
bDescriptorType 36
bDescriptorSubtype 6 (EXTENSION_UNIT)
bUnitID 9
guidExtensionCode {1f5d4ca9-de11-4487-840d-50933c8ec8d1}
bNumControls 17
bNrInPins 1
baSourceID( 0) 1
bControlSize 3
bmControls( 0) 0xf3
bmControls( 1) 0xff
bmControls( 2) 0x23
iExtension 0
VideoControl Interface Descriptor:
bLength 27
bDescriptorType 36
bDescriptorSubtype 6 (EXTENSION_UNIT)
bUnitID 10
guidExtensionCode {49e40215-f434-47fe-b158-0e885023e51b}
bNumControls 7
bNrInPins 1
baSourceID( 0) 1
bControlSize 2
bmControls( 0) 0xaa
bmControls( 1) 0x07
iExtension 0
VideoControl Interface Descriptor:
bLength 27
bDescriptorType 36
bDescriptorSubtype 6 (EXTENSION_UNIT)
bUnitID 11
guidExtensionCode {ffe52d21-8030-4e2c-82d9-f587d00540bd}
bNumControls 2
bNrInPins 1
baSourceID( 0) 1
bControlSize 2
bmControls( 0) 0x00
bmControls( 1) 0x41
iExtension 0
VideoControl Interface Descriptor:
bLength 27
bDescriptorType 36
bDescriptorSubtype 6 (EXTENSION_UNIT)
bUnitID 12
guidExtensionCode {a29e7641-de04-47e3-8b2b-f4341aff003b}
bNumControls 11
bNrInPins 1
baSourceID( 0) 3
bControlSize 2
bmControls( 0) 0x07
bmControls( 1) 0x7f
iExtension 0
VideoControl Interface Descriptor:
bLength 9
bDescriptorType 36
bDescriptorSubtype 3 (OUTPUT_TERMINAL)
bTerminalID 4
wTerminalType 0x0101 USB Streaming
bAssocTerminal 0
bSourceID 3
iTerminal 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 8
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 15
bDescriptorType 36
bDescriptorSubtype 1 (INPUT_HEADER)
bNumFormats 2
wTotalLength 0x0751
bEndpointAddress 0x81 EP 1 IN
bmInfo 0
bTerminalLink 4
bStillCaptureMethod 0
bTriggerSupport 0
bTriggerUsage 0
bControlSize 1
bmaControls( 0) 0
bmaControls( 1) 4
VideoStreaming Interface Descriptor:
bLength 27
bDescriptorType 36
bDescriptorSubtype 4 (FORMAT_UNCOMPRESSED)
bFormatIndex 1
bNumFrameDescriptors 19
guidFormat
{32595559-0000-0010-8000-00aa00389b71}
bBitsPerPixel 16
bDefaultFrameIndex 1
bAspectRatioX 0
bAspectRatioY 0
bmInterlaceFlags 0x00
Interlaced stream or variable: No
Fields per frame: 2 fields
Field 1 first: No
Field pattern: Field 1 only
bCopyProtect 0
VideoStreaming Interface Descriptor:
bLength 54
bDescriptorType 36
bDescriptorSubtype 5 (FRAME_UNCOMPRESSED)
bFrameIndex 1
bmCapabilities 0x00
Still image unsupported
wWidth 640
wHeight 480
dwMinBitRate 24576000
dwMaxBitRate 147456000
dwMaxVideoFrameBufferSize 614400
dwDefaultFrameInterval 333333
bFrameIntervalType 7
dwFrameInterval( 0) 333333
dwFrameInterval( 1) 416666
dwFrameInterval( 2) 500000
dwFrameInterval( 3) 666666
dwFrameInterval( 4) 1000000
dwFrameInterval( 5) 1333333
dwFrameInterval( 6) 2000000
VideoStreaming Interface Descriptor:
bLength 54
bDescriptorType 36
bDescriptorSubtype 5 (FRAME_UNCOMPRESSED)
bFrameIndex 2
bmCapabilities 0x00
Still image unsupported
wWidth 160
wHeight 90
dwMinBitRate 1152000
dwMaxBitRate 6912000
dwMaxVideoFrameBufferSize 28800
dwDefaultFrameInterval 333333
bFrameIntervalType 7
dwFrameInterval( 0) 333333
dwFrameInterval( 1) 416666
dwFrameInterval( 2) 500000
dwFrameInterval( 3) 666666
dwFrameInterval( 4) 1000000
dwFrameInterval( 5) 1333333
dwFrameInterval( 6) 2000000
VideoStreaming Interface Descriptor:
bLength 54
bDescriptorType 36
bDescriptorSubtype 5 (FRAME_UNCOMPRESSED)
bFrameIndex 3
bmCapabilities 0x00
Still image unsupported
wWidth 160
wHeight 120
dwMinBitRate 1536000
dwMaxBitRate 9216000
dwMaxVideoFrameBufferSize 38400
dwDefaultFrameInterval 333333
bFrameIntervalType 7
dwFrameInterval( 0) 333333
dwFrameInterval( 1) 416666
dwFrameInterval( 2) 500000
dwFrameInterval( 3) 666666
dwFrameInterval( 4) 1000000
dwFrameInterval( 5) 1333333
dwFrameInterval( 6) 2000000
VideoStreaming Interface Descriptor:
bLength 54
bDescriptorType 36
bDescriptorSubtype 5 (FRAME_UNCOMPRESSED)
bFrameIndex 4
bmCapabilities 0x00
Still image unsupported
wWidth 176
wHeight 144
dwMinBitRate 2027520
dwMaxBitRate 12165120
dwMaxVideoFrameBufferSize 50688
dwDefaultFrameInterval 333333
bFrameIntervalType 7
dwFrameInterval( 0) 333333
dwFrameInterval( 1) 416666
dwFrameInterval( 2) 500000
dwFrameInterval( 3) 666666
dwFrameInterval( 4) 1000000
dwFrameInterval( 5) 1333333
dwFrameInterval( 6) 2000000
VideoStreaming Interface Descriptor:
bLength 54
bDescriptorType 36
bDescriptorSubtype 5 (FRAME_UNCOMPRESSED)
bFrameIndex 5
bmCapabilities 0x00
Still image unsupported
wWidth 320
wHeight 180
dwMinBitRate 4608000
dwMaxBitRate 27648000
dwMaxVideoFrameBufferSize 115200
dwDefaultFrameInterval 333333
bFrameIntervalType 7
dwFrameInterval( 0) 333333
dwFrameInterval( 1) 416666
dwFrameInterval( 2) 500000
dwFrameInterval( 3) 666666
dwFrameInterval( 4) 1000000
dwFrameInterval( 5) 1333333
dwFrameInterval( 6) 2000000
VideoStreaming Interface Descriptor:
bLength 54
bDescriptorType 36
bDescriptorSubtype 5 (FRAME_UNCOMPRESSED)
bFrameIndex 6
bmCapabilities 0x00
Still image unsupported
wWidth 320
wHeight 240
dwMinBitRate 6144000
dwMaxBitRate 36864000
dwMaxVideoFrameBufferSize 153600
dwDefaultFrameInterval 333333
bFrameIntervalType 7
dwFrameInterval( 0) 333333
dwFrameInterval( 1) 416666
dwFrameInterval( 2) 500000
dwFrameInterval( 3) 666666
dwFrameInterval( 4) 1000000
dwFrameInterval( 5) 1333333
dwFrameInterval( 6) 2000000
VideoStreaming Interface Descriptor:
bLength 54
bDescriptorType 36
bDescriptorSubtype 5 (FRAME_UNCOMPRESSED)
bFrameIndex 7
bmCapabilities 0x00
Still image unsupported
wWidth 352
wHeight 288
dwMinBitRate 8110080
dwMaxBitRate 48660480
dwMaxVideoFrameBufferSize 202752
dwDefaultFrameInterval 333333
bFrameIntervalType 7
dwFrameInterval( 0) 333333
dwFrameInterval( 1) 416666
dwFrameInterval( 2) 500000
dwFrameInterval( 3) 666666
dwFrameInterval( 4) 1000000
dwFrameInterval( 5) 1333333
dwFrameInterval( 6) 2000000
VideoStreaming Interface Descriptor:
bLength 54
bDescriptorType 36
bDescriptorSubtype 5 (FRAME_UNCOMPRESSED)
bFrameIndex 8
bmCapabilities 0x00
Still image unsupported
wWidth 432
wHeight 240
dwMinBitRate 8294400
dwMaxBitRate 49766400
dwMaxVideoFrameBufferSize 207360
dwDefaultFrameInterval 333333
bFrameIntervalType 7
dwFrameInterval( 0) 333333
dwFrameInterval( 1) 416666
dwFrameInterval( 2) 500000
dwFrameInterval( 3) 666666
dwFrameInterval( 4) 1000000
dwFrameInterval( 5) 1333333
dwFrameInterval( 6) 2000000
VideoStreaming Interface Descriptor:
bLength 54
bDescriptorType 36
bDescriptorSubtype 5 (FRAME_UNCOMPRESSED)
bFrameIndex 9
bmCapabilities 0x00
Still image unsupported
wWidth 640
wHeight 360
dwMinBitRate 18432000
dwMaxBitRate 110592000
dwMaxVideoFrameBufferSize 460800
dwDefaultFrameInterval 333333
bFrameIntervalType 7
dwFrameInterval( 0) 333333
dwFrameInterval( 1) 416666
dwFrameInterval( 2) 500000
dwFrameInterval( 3) 666666
dwFrameInterval( 4) 1000000
dwFrameInterval( 5) 1333333
dwFrameInterval( 6) 2000000
VideoStreaming Interface Descriptor:
bLength 54
bDescriptorType 36
bDescriptorSubtype 5 (FRAME_UNCOMPRESSED)
bFrameIndex 10
bmCapabilities 0x00
Still image unsupported
wWidth 800
wHeight 448
dwMinBitRate 28672000
dwMaxBitRate 172032000
dwMaxVideoFrameBufferSize 716800
dwDefaultFrameInterval 333333
bFrameIntervalType 7
dwFrameInterval( 0) 333333
dwFrameInterval( 1) 416666
dwFrameInterval( 2) 500000
dwFrameInterval( 3) 666666
dwFrameInterval( 4) 1000000
dwFrameInterval( 5) 1333333
dwFrameInterval( 6) 2000000
VideoStreaming Interface Descriptor:
bLength 50
bDescriptorType 36
bDescriptorSubtype 5 (FRAME_UNCOMPRESSED)
bFrameIndex 11
bmCapabilities 0x00
Still image unsupported
wWidth 800
wHeight 600
dwMinBitRate 38400000
dwMaxBitRate 184320000
dwMaxVideoFrameBufferSize 960000
dwDefaultFrameInterval 416666
bFrameIntervalType 6
dwFrameInterval( 0) 416666
dwFrameInterval( 1) 500000
dwFrameInterval( 2) 666666
dwFrameInterval( 3) 1000000
dwFrameInterval( 4) 1333333
dwFrameInterval( 5) 2000000
VideoStreaming Interface Descriptor:
bLength 50
bDescriptorType 36
bDescriptorSubtype 5 (FRAME_UNCOMPRESSED)
bFrameIndex 12
bmCapabilities 0x00
Still image unsupported
wWidth 864
wHeight 480
dwMinBitRate 33177600
dwMaxBitRate 159252480
dwMaxVideoFrameBufferSize 829440
dwDefaultFrameInterval 416666
bFrameIntervalType 6
dwFrameInterval( 0) 416666
dwFrameInterval( 1) 500000
dwFrameInterval( 2) 666666
dwFrameInterval( 3) 1000000
dwFrameInterval( 4) 1333333
dwFrameInterval( 5) 2000000
VideoStreaming Interface Descriptor:
bLength 42
bDescriptorType 36
bDescriptorSubtype 5 (FRAME_UNCOMPRESSED)
bFrameIndex 13
bmCapabilities 0x00
Still image unsupported
wWidth 960
wHeight 720
dwMinBitRate 55296000
dwMaxBitRate 165888000
dwMaxVideoFrameBufferSize 1382400
dwDefaultFrameInterval 666666
bFrameIntervalType 4
dwFrameInterval( 0) 666666
dwFrameInterval( 1) 1000000
dwFrameInterval( 2) 1333333
dwFrameInterval( 3) 2000000
VideoStreaming Interface Descriptor:
bLength 42
bDescriptorType 36
bDescriptorSubtype 5 (FRAME_UNCOMPRESSED)
bFrameIndex 14
bmCapabilities 0x00
Still image unsupported
wWidth 1024
wHeight 576
dwMinBitRate 47185920
dwMaxBitRate 141557760
dwMaxVideoFrameBufferSize 1179648
dwDefaultFrameInterval 666666
bFrameIntervalType 4
dwFrameInterval( 0) 666666
dwFrameInterval( 1) 1000000
dwFrameInterval( 2) 1333333
dwFrameInterval( 3) 2000000
VideoStreaming Interface Descriptor:
bLength 38
bDescriptorType 36
bDescriptorSubtype 5 (FRAME_UNCOMPRESSED)
bFrameIndex 15
bmCapabilities 0x00
Still image unsupported
wWidth 1280
wHeight 720
dwMinBitRate 73728000
dwMaxBitRate 147456000
dwMaxVideoFrameBufferSize 1843200
dwDefaultFrameInterval 1000000
bFrameIntervalType 3
dwFrameInterval( 0) 1000000
dwFrameInterval( 1) 1333333
dwFrameInterval( 2) 2000000
VideoStreaming Interface Descriptor:
bLength 34
bDescriptorType 36
bDescriptorSubtype 5 (FRAME_UNCOMPRESSED)
bFrameIndex 16
bmCapabilities 0x00
Still image unsupported
wWidth 1600
wHeight 896
dwMinBitRate 114688000
dwMaxBitRate 172032000
dwMaxVideoFrameBufferSize 2867200
dwDefaultFrameInterval 1333333
bFrameIntervalType 2
dwFrameInterval( 0) 1333333
dwFrameInterval( 1) 2000000
VideoStreaming Interface Descriptor:
bLength 30
bDescriptorType 36
bDescriptorSubtype 5 (FRAME_UNCOMPRESSED)
bFrameIndex 17
bmCapabilities 0x00
Still image unsupported
wWidth 1920
wHeight 1080
dwMinBitRate 165888000
dwMaxBitRate 165888000
dwMaxVideoFrameBufferSize 4147200
dwDefaultFrameInterval 2000000
bFrameIntervalType 1
dwFrameInterval( 0) 2000000
VideoStreaming Interface Descriptor:
bLength 30
bDescriptorType 36
bDescriptorSubtype 5 (FRAME_UNCOMPRESSED)
bFrameIndex 18
bmCapabilities 0x00
Still image unsupported
wWidth 2304
wHeight 1296
dwMinBitRate 238878720
dwMaxBitRate 238878720
dwMaxVideoFrameBufferSize 5971968
dwDefaultFrameInterval 4999998
bFrameIntervalType 1
dwFrameInterval( 0) 4999998
VideoStreaming Interface Descriptor:
bLength 30
bDescriptorType 36
bDescriptorSubtype 5 (FRAME_UNCOMPRESSED)
bFrameIndex 19
bmCapabilities 0x00
Still image unsupported
wWidth 2304
wHeight 1536
dwMinBitRate 283115520
dwMaxBitRate 283115520
dwMaxVideoFrameBufferSize 7077888
dwDefaultFrameInterval 4999998
bFrameIntervalType 1
dwFrameInterval( 0) 4999998
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))
VideoStreaming Interface Descriptor:
bLength 11
bDescriptorType 36
bDescriptorSubtype 6 (FORMAT_MJPEG)
bFormatIndex 2
bNumFrameDescriptors 17
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 54
bDescriptorType 36
bDescriptorSubtype 7 (FRAME_MJPEG)
bFrameIndex 1
bmCapabilities 0x00
Still image unsupported
wWidth 640
wHeight 480
dwMinBitRate 24576000
dwMaxBitRate 147456000
dwMaxVideoFrameBufferSize 614400
dwDefaultFrameInterval 333333
bFrameIntervalType 7
dwFrameInterval( 0) 333333
dwFrameInterval( 1) 416666
dwFrameInterval( 2) 500000
dwFrameInterval( 3) 666666
dwFrameInterval( 4) 1000000
dwFrameInterval( 5) 1333333
dwFrameInterval( 6) 2000000
VideoStreaming Interface Descriptor:
bLength 54
bDescriptorType 36
bDescriptorSubtype 7 (FRAME_MJPEG)
bFrameIndex 2
bmCapabilities 0x00
Still image unsupported
wWidth 160
wHeight 90
dwMinBitRate 1152000
dwMaxBitRate 6912000
dwMaxVideoFrameBufferSize 28800
dwDefaultFrameInterval 333333
bFrameIntervalType 7
dwFrameInterval( 0) 333333
dwFrameInterval( 1) 416666
dwFrameInterval( 2) 500000
dwFrameInterval( 3) 666666
dwFrameInterval( 4) 1000000
dwFrameInterval( 5) 1333333
dwFrameInterval( 6) 2000000
VideoStreaming Interface Descriptor:
bLength 54
bDescriptorType 36
bDescriptorSubtype 7 (FRAME_MJPEG)
bFrameIndex 3
bmCapabilities 0x00
Still image unsupported
wWidth 160
wHeight 120
dwMinBitRate 1536000
dwMaxBitRate 9216000
dwMaxVideoFrameBufferSize 38400
dwDefaultFrameInterval 333333
bFrameIntervalType 7
dwFrameInterval( 0) 333333
dwFrameInterval( 1) 416666
dwFrameInterval( 2) 500000
dwFrameInterval( 3) 666666
dwFrameInterval( 4) 1000000
dwFrameInterval( 5) 1333333
dwFrameInterval( 6) 2000000
VideoStreaming Interface Descriptor:
bLength 54
bDescriptorType 36
bDescriptorSubtype 7 (FRAME_MJPEG)
bFrameIndex 4
bmCapabilities 0x00
Still image unsupported
wWidth 176
wHeight 144
dwMinBitRate 2027520
dwMaxBitRate 12165120
dwMaxVideoFrameBufferSize 50688
dwDefaultFrameInterval 333333
bFrameIntervalType 7
dwFrameInterval( 0) 333333
dwFrameInterval( 1) 416666
dwFrameInterval( 2) 500000
dwFrameInterval( 3) 666666
dwFrameInterval( 4) 1000000
dwFrameInterval( 5) 1333333
dwFrameInterval( 6) 2000000
VideoStreaming Interface Descriptor:
bLength 54
bDescriptorType 36
bDescriptorSubtype 7 (FRAME_MJPEG)
bFrameIndex 5
bmCapabilities 0x00
Still image unsupported
wWidth 320
wHeight 180
dwMinBitRate 4608000
dwMaxBitRate 27648000
dwMaxVideoFrameBufferSize 115200
dwDefaultFrameInterval 333333
bFrameIntervalType 7
dwFrameInterval( 0) 333333
dwFrameInterval( 1) 416666
dwFrameInterval( 2) 500000
dwFrameInterval( 3) 666666
dwFrameInterval( 4) 1000000
dwFrameInterval( 5) 1333333
dwFrameInterval( 6) 2000000
VideoStreaming Interface Descriptor:
bLength 54
bDescriptorType 36
bDescriptorSubtype 7 (FRAME_MJPEG)
bFrameIndex 6
bmCapabilities 0x00
Still image unsupported
wWidth 320
wHeight 240
dwMinBitRate 6144000
dwMaxBitRate 36864000
dwMaxVideoFrameBufferSize 153600
dwDefaultFrameInterval 333333
bFrameIntervalType 7
dwFrameInterval( 0) 333333
dwFrameInterval( 1) 416666
dwFrameInterval( 2) 500000
dwFrameInterval( 3) 666666
dwFrameInterval( 4) 1000000
dwFrameInterval( 5) 1333333
dwFrameInterval( 6) 2000000
VideoStreaming Interface Descriptor:
bLength 54
bDescriptorType 36
bDescriptorSubtype 7 (FRAME_MJPEG)
bFrameIndex 7
bmCapabilities 0x00
Still image unsupported
wWidth 352
wHeight 288
dwMinBitRate 8110080
dwMaxBitRate 48660480
dwMaxVideoFrameBufferSize 202752
dwDefaultFrameInterval 333333
bFrameIntervalType 7
dwFrameInterval( 0) 333333
dwFrameInterval( 1) 416666
dwFrameInterval( 2) 500000
dwFrameInterval( 3) 666666
dwFrameInterval( 4) 1000000
dwFrameInterval( 5) 1333333
dwFrameInterval( 6) 2000000
VideoStreaming Interface Descriptor:
bLength 54
bDescriptorType 36
bDescriptorSubtype 7 (FRAME_MJPEG)
bFrameIndex 8
bmCapabilities 0x00
Still image unsupported
wWidth 432
wHeight 240
dwMinBitRate 8294400
dwMaxBitRate 49766400
dwMaxVideoFrameBufferSize 207360
dwDefaultFrameInterval 333333
bFrameIntervalType 7
dwFrameInterval( 0) 333333
dwFrameInterval( 1) 416666
dwFrameInterval( 2) 500000
dwFrameInterval( 3) 666666
dwFrameInterval( 4) 1000000
dwFrameInterval( 5) 1333333
dwFrameInterval( 6) 2000000
VideoStreaming Interface Descriptor:
bLength 54
bDescriptorType 36
bDescriptorSubtype 7 (FRAME_MJPEG)
bFrameIndex 9
bmCapabilities 0x00
Still image unsupported
wWidth 640
wHeight 360
dwMinBitRate 18432000
dwMaxBitRate 110592000
dwMaxVideoFrameBufferSize 460800
dwDefaultFrameInterval 333333
bFrameIntervalType 7
dwFrameInterval( 0) 333333
dwFrameInterval( 1) 416666
dwFrameInterval( 2) 500000
dwFrameInterval( 3) 666666
dwFrameInterval( 4) 1000000
dwFrameInterval( 5) 1333333
dwFrameInterval( 6) 2000000
VideoStreaming Interface Descriptor:
bLength 54
bDescriptorType 36
bDescriptorSubtype 7 (FRAME_MJPEG)
bFrameIndex 10
bmCapabilities 0x00
Still image unsupported
wWidth 800
wHeight 448
dwMinBitRate 28672000
dwMaxBitRate 172032000
dwMaxVideoFrameBufferSize 716800
dwDefaultFrameInterval 333333
bFrameIntervalType 7
dwFrameInterval( 0) 333333
dwFrameInterval( 1) 416666
dwFrameInterval( 2) 500000
dwFrameInterval( 3) 666666
dwFrameInterval( 4) 1000000
dwFrameInterval( 5) 1333333
dwFrameInterval( 6) 2000000
VideoStreaming Interface Descriptor:
bLength 54
bDescriptorType 36
bDescriptorSubtype 7 (FRAME_MJPEG)
bFrameIndex 11
bmCapabilities 0x00
Still image unsupported
wWidth 800
wHeight 600
dwMinBitRate 38400000
dwMaxBitRate 230400000
dwMaxVideoFrameBufferSize 960000
dwDefaultFrameInterval 333333
bFrameIntervalType 7
dwFrameInterval( 0) 333333
dwFrameInterval( 1) 416666
dwFrameInterval( 2) 500000
dwFrameInterval( 3) 666666
dwFrameInterval( 4) 1000000
dwFrameInterval( 5) 1333333
dwFrameInterval( 6) 2000000
VideoStreaming Interface Descriptor:
bLength 54
bDescriptorType 36
bDescriptorSubtype 7 (FRAME_MJPEG)
bFrameIndex 12
bmCapabilities 0x00
Still image unsupported
wWidth 864
wHeight 480
dwMinBitRate 33177600
dwMaxBitRate 199065600
dwMaxVideoFrameBufferSize 829440
dwDefaultFrameInterval 333333
bFrameIntervalType 7
dwFrameInterval( 0) 333333
dwFrameInterval( 1) 416666
dwFrameInterval( 2) 500000
dwFrameInterval( 3) 666666
dwFrameInterval( 4) 1000000
dwFrameInterval( 5) 1333333
dwFrameInterval( 6) 2000000
VideoStreaming Interface Descriptor:
bLength 54
bDescriptorType 36
bDescriptorSubtype 7 (FRAME_MJPEG)
bFrameIndex 13
bmCapabilities 0x00
Still image unsupported
wWidth 960
wHeight 720
dwMinBitRate 55296000
dwMaxBitRate 331776000
dwMaxVideoFrameBufferSize 1382400
dwDefaultFrameInterval 333333
bFrameIntervalType 7
dwFrameInterval( 0) 333333
dwFrameInterval( 1) 416666
dwFrameInterval( 2) 500000
dwFrameInterval( 3) 666666
dwFrameInterval( 4) 1000000
dwFrameInterval( 5) 1333333
dwFrameInterval( 6) 2000000
VideoStreaming Interface Descriptor:
bLength 54
bDescriptorType 36
bDescriptorSubtype 7 (FRAME_MJPEG)
bFrameIndex 14
bmCapabilities 0x00
Still image unsupported
wWidth 1024
wHeight 576
dwMinBitRate 47185920
dwMaxBitRate 283115520
dwMaxVideoFrameBufferSize 1179648
dwDefaultFrameInterval 333333
bFrameIntervalType 7
dwFrameInterval( 0) 333333
dwFrameInterval( 1) 416666
dwFrameInterval( 2) 500000
dwFrameInterval( 3) 666666
dwFrameInterval( 4) 1000000
dwFrameInterval( 5) 1333333
dwFrameInterval( 6) 2000000
VideoStreaming Interface Descriptor:
bLength 58
bDescriptorType 36
bDescriptorSubtype 7 (FRAME_MJPEG)
bFrameIndex 15
bmCapabilities 0x00
Still image unsupported
wWidth 1280
wHeight 720
dwMinBitRate 73728000
dwMaxBitRate 884736000
dwMaxVideoFrameBufferSize 1843200
dwDefaultFrameInterval 166666
bFrameIntervalType 8
dwFrameInterval( 0) 166666
dwFrameInterval( 1) 333333
dwFrameInterval( 2) 416666
dwFrameInterval( 3) 500000
dwFrameInterval( 4) 666666
dwFrameInterval( 5) 1000000
dwFrameInterval( 6) 1333333
dwFrameInterval( 7) 2000000
VideoStreaming Interface Descriptor:
bLength 54
bDescriptorType 36
bDescriptorSubtype 7 (FRAME_MJPEG)
bFrameIndex 16
bmCapabilities 0x00
Still image unsupported
wWidth 1600
wHeight 896
dwMinBitRate 114688000
dwMaxBitRate 688128000
dwMaxVideoFrameBufferSize 2867200
dwDefaultFrameInterval 333333
bFrameIntervalType 7
dwFrameInterval( 0) 333333
dwFrameInterval( 1) 416666
dwFrameInterval( 2) 500000
dwFrameInterval( 3) 666666
dwFrameInterval( 4) 1000000
dwFrameInterval( 5) 1333333
dwFrameInterval( 6) 2000000
VideoStreaming Interface Descriptor:
bLength 54
bDescriptorType 36
bDescriptorSubtype 7 (FRAME_MJPEG)
bFrameIndex 17
bmCapabilities 0x00
Still image unsupported
wWidth 1920
wHeight 1080
dwMinBitRate 165888000
dwMaxBitRate 995328000
dwMaxVideoFrameBufferSize 4147200
dwDefaultFrameInterval 333333
bFrameIntervalType 7
dwFrameInterval( 0) 333333
dwFrameInterval( 1) 416666
dwFrameInterval( 2) 500000
dwFrameInterval( 3) 666666
dwFrameInterval( 4) 1000000
dwFrameInterval( 5) 1333333
dwFrameInterval( 6) 2000000
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 0x00c0 1x 192 bytes
bInterval 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 2
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 0x0180 1x 384 bytes
bInterval 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 3
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 0x0200 1x 512 bytes
bInterval 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 4
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 0x0280 1x 640 bytes
bInterval 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 5
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 0x0320 1x 800 bytes
bInterval 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 6
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 0x03b0 1x 944 bytes
bInterval 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 7
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 0x0a80 2x 640 bytes
bInterval 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 8
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 0x0b20 2x 800 bytes
bInterval 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 9
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 0x0be0 2x 992 bytes
bInterval 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 10
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 0x1380 3x 896 bytes
bInterval 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 11
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 2 Streaming
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 0x0026
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 0x0003
Left Front (L)
Right Front (R)
iChannelNames 0
iTerminal 0
AudioControl Interface Descriptor:
bLength 9
bDescriptorType 36
bDescriptorSubtype 3 (OUTPUT_TERMINAL)
bTerminalID 3
wTerminalType 0x0101 USB Streaming
bAssocTerminal 0
bSourceID 5
iTerminal 0
AudioControl Interface Descriptor:
bLength 8
bDescriptorType 36
bDescriptorSubtype 6 (FEATURE_UNIT)
bUnitID 5
bSourceID 1
bControlSize 1
bmaControls(0) 0x03
Mute Control
Volume Control
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 3
bDelay 255 frames
wFormatTag 0x0001 PCM
AudioStreaming Interface Descriptor:
bLength 11
bDescriptorType 36
bDescriptorSubtype 2 (FORMAT_TYPE)
bFormatType 1 (FORMAT_TYPE_I)
bNrChannels 2
bSubframeSize 2
bBitResolution 16
bSamFreqType 1 Discrete
tSamFreq[ 0] 16000
Endpoint Descriptor:
bLength 9
bDescriptorType 5
bEndpointAddress 0x82 EP 2 IN
bmAttributes 5
Transfer Type Isochronous
Synch Type Asynchronous
Usage Type Data
wMaxPacketSize 0x0044 1x 68 bytes
bInterval 4
bRefresh 0
bSynchAddress 0
AudioStreaming Endpoint Descriptor:
bLength 7
bDescriptorType 37
bDescriptorSubtype 1 (EP_GENERAL)
bmAttributes 0x01
Sampling Frequency
bLockDelayUnits 0 Undefined
wLockDelay 0x0000
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 3
bAlternateSetting 2
bNumEndpoints 1
bInterfaceClass 1 Audio
bInterfaceSubClass 2 Streaming
bInterfaceProtocol 0
iInterface 0
AudioStreaming Interface Descriptor:
bLength 7
bDescriptorType 36
bDescriptorSubtype 1 (AS_GENERAL)
bTerminalLink 3
bDelay 255 frames
wFormatTag 0x0001 PCM
AudioStreaming Interface Descriptor:
bLength 11
bDescriptorType 36
bDescriptorSubtype 2 (FORMAT_TYPE)
bFormatType 1 (FORMAT_TYPE_I)
bNrChannels 2
bSubframeSize 2
bBitResolution 16
bSamFreqType 1 Discrete
tSamFreq[ 0] 24000
Endpoint Descriptor:
bLength 9
bDescriptorType 5
bEndpointAddress 0x82 EP 2 IN
bmAttributes 5
Transfer Type Isochronous
Synch Type Asynchronous
Usage Type Data
wMaxPacketSize 0x0064 1x 100 bytes
bInterval 4
bRefresh 0
bSynchAddress 0
AudioStreaming Endpoint Descriptor:
bLength 7
bDescriptorType 37
bDescriptorSubtype 1 (EP_GENERAL)
bmAttributes 0x01
Sampling Frequency
bLockDelayUnits 0 Undefined
wLockDelay 0x0000
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 3
bAlternateSetting 3
bNumEndpoints 1
bInterfaceClass 1 Audio
bInterfaceSubClass 2 Streaming
bInterfaceProtocol 0
iInterface 0
AudioStreaming Interface Descriptor:
bLength 7
bDescriptorType 36
bDescriptorSubtype 1 (AS_GENERAL)
bTerminalLink 3
bDelay 255 frames
wFormatTag 0x0001 PCM
AudioStreaming Interface Descriptor:
bLength 11
bDescriptorType 36
bDescriptorSubtype 2 (FORMAT_TYPE)
bFormatType 1 (FORMAT_TYPE_I)
bNrChannels 2
bSubframeSize 2
bBitResolution 16
bSamFreqType 1 Discrete
tSamFreq[ 0] 32000
Endpoint Descriptor:
bLength 9
bDescriptorType 5
bEndpointAddress 0x82 EP 2 IN
bmAttributes 5
Transfer Type Isochronous
Synch Type Asynchronous
Usage Type Data
wMaxPacketSize 0x0084 1x 132 bytes
bInterval 4
bRefresh 0
bSynchAddress 0
AudioStreaming Endpoint Descriptor:
bLength 7
bDescriptorType 37
bDescriptorSubtype 1 (EP_GENERAL)
bmAttributes 0x01
Sampling Frequency
bLockDelayUnits 0 Undefined
wLockDelay 0x0000
Device Qualifier (for other device speed):
bLength 10
bDescriptorType 6
bcdUSB 2.00
bDeviceClass 239 Miscellaneous Device
bDeviceSubClass 2
bDeviceProtocol 1 Interface Association
bMaxPacketSize0 64
bNumConfigurations 1
Device Status: 0x0000
(Bus Powered)
On Tue, Aug 4, 2026 at 2:38=E2=80=AFPM Ricardo Ribalda <[email protected]=
g> wrote:
>
> Hi Yunke
>
> On Mon, 3 Aug 2026 at 08:58, Yunke Cao <[email protected]> wrote:
> >
> > Logitech C925e SOF does not increases at a stable rate of 1kHz.
> > Add a quirk for this camera to make hwtimestamp usable.
> >
> > Before applying the quirk:
> > ```
> > seq: 31 ts: 1075.543294 delta: 29.423 ms fps: 34.94
> > seq: 32 ts: 1075.573022 delta: 29.728 ms fps: 34.90
> > seq: 33 ts: 1075.602353 delta: 29.331 ms fps: 34.87
> > seq: 34 ts: 1075.632031 delta: 29.678 ms fps: 34.84
> > seq: 35 ts: 1076.177759 delta: 545.728 ms fps: 23.00
> > seq: 36 ts: 1076.213255 delta: 35.496 ms fps: 23.12
> > seq: 37 ts: 1076.209371 delta: -3.884 ms fps: 23.82
> > seq: 38 ts: 1076.232233 delta: 22.862 ms fps: 24.11
> > seq: 39 ts: 1076.264682 delta: 32.449 ms fps: 24.24
> > seq: 40 ts: 1076.287318 delta: 22.636 ms fps: 24.52
> > seq: 41 ts: 1076.285949 delta: -1.369 ms fps: 25.16
> > seq: 42 ts: 1076.317714 delta: 31.765 ms fps: 25.28
> > seq: 43 ts: 1076.317085 delta: -0.629 ms fps: 25.89
> > seq: 44 ts: 1076.339919 delta: 22.834 ms fps: 26.13
> > seq: 45 ts: 1076.212836 delta: -127.083 ms fps: 28.91
> > seq: 46 ts: 1076.242494 delta: 29.658 ms fps: 29.00
> > seq: 47 ts: 1076.271852 delta: 29.358 ms fps: 29.09
> > seq: 48 ts: 1076.301739 delta: 29.887 ms fps: 29.17
> > seq: 49 ts: 1076.330887 delta: 29.148 ms fps: 29.26
> > seq: 50 ts: 1076.360639 delta: 29.752 ms fps: 29.33
> > seq: 51 ts: 1076.390095 delta: 29.456 ms fps: 29.41
> > ```
> >
> > After applying the quirk:
> > ```
> > seq: 31 ts: 203.782342 delta: 33.460 ms fps: 30.94
> > seq: 32 ts: 203.815492 delta: 33.150 ms fps: 30.91
> > seq: 33 ts: 203.849017 delta: 33.525 ms fps: 30.88
> > seq: 34 ts: 203.882190 delta: 33.173 ms fps: 30.86
> > seq: 35 ts: 203.915672 delta: 33.482 ms fps: 30.83
> > seq: 36 ts: 203.948902 delta: 33.230 ms fps: 30.81
> > seq: 37 ts: 203.982335 delta: 33.433 ms fps: 30.78
> > seq: 38 ts: 204.015475 delta: 33.140 ms fps: 30.76
> > seq: 39 ts: 204.048992 delta: 33.517 ms fps: 30.74
> > seq: 40 ts: 204.082208 delta: 33.216 ms fps: 30.72
> > seq: 41 ts: 204.115675 delta: 33.467 ms fps: 30.70
> > seq: 42 ts: 204.148995 delta: 33.320 ms fps: 30.69
> > seq: 43 ts: 204.182354 delta: 33.359 ms fps: 30.67
> > seq: 44 ts: 204.215605 delta: 33.251 ms fps: 30.66
> > seq: 45 ts: 204.249004 delta: 33.399 ms fps: 30.64
> > seq: 46 ts: 204.282259 delta: 33.255 ms fps: 30.63
> > seq: 47 ts: 204.315686 delta: 33.427 ms fps: 30.61
> > seq: 48 ts: 204.348945 delta: 33.259 ms fps: 30.60
> > seq: 49 ts: 204.382337 delta: 33.392 ms fps: 30.59
> > seq: 50 ts: 204.415570 delta: 33.233 ms fps: 30.58
> > seq: 51 ts: 204.449069 delta: 33.499 ms fps: 30.56
> > seq: 52 ts: 204.482218 delta: 33.149 ms fps: 30.55
> > seq: 53 ts: 204.515706 delta: 33.488 ms fps: 30.54
> > seq: 54 ts: 204.548940 delta: 33.234 ms fps: 30.53
> > seq: 55 ts: 204.582403 delta: 33.463 ms fps: 30.52
> > seq: 56 ts: 204.615563 delta: 33.160 ms fps: 30.51
> > seq: 57 ts: 204.649057 delta: 33.494 ms fps: 30.50
> > seq: 58 ts: 204.682301 delta: 33.244 ms fps: 30.49
> > seq: 59 ts: 204.715735 delta: 33.434 ms fps: 30.48
> > seq: 60 ts: 204.748890 delta: 33.155 ms fps: 30.48
> > ```
> >
> > lsusb -v
>
> Could you provide the full lsusb output if you still have access to the d=
evice?
>
> Thanks
> >
> > Bus 003 Device 005: ID 046d:085b
> > Device Descriptor:
> > bLength 18
> > bDescriptorType 1
> > bcdUSB 2.00
> > bDeviceClass 239
> > bDeviceSubClass 2
> > bDeviceProtocol 1
> > bMaxPacketSize0 64
> > idVendor 0x046d
> > idProduct 0x085b
> > bcdDevice 0.16
> > iManufacturer 0
> > iProduct 2 Logitech Webcam C925e
> > iSerial 1 2F2036AF
> > bNumConfigurations 1
> >
> Reviewed-by: Ricardo Ribalda <[email protected]>
> > Signed-off-by: Yunke Cao <[email protected]>
> > ---
> > drivers/media/usb/uvc/uvc_driver.c | 9 +++++++++
> > 1 file changed, 9 insertions(+)
> >
> > diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc=
/uvc_driver.c
> > index e289cc71ba98..5b9ea19ad9f2 100644
> > --- a/drivers/media/usb/uvc/uvc_driver.c
> > +++ b/drivers/media/usb/uvc/uvc_driver.c
> > @@ -2706,6 +2706,15 @@ static const struct usb_device_id uvc_ids[] =3D =
{
> > .bInterfaceSubClass =3D 1,
> > .bInterfaceProtocol =3D 0,
> > .driver_info =3D UVC_INFO_QUIRK(UVC_QUIRK_INVALID_DE=
VICE_SOF) },
> > + /* Logitech HD Pro Webcam C925e */
> > + { .match_flags =3D USB_DEVICE_ID_MATCH_DEVICE
> > + | USB_DEVICE_ID_MATCH_INT_INFO,
> > + .idVendor =3D 0x046d,
> > + .idProduct =3D 0x085b,
> > + .bInterfaceClass =3D USB_CLASS_VIDEO,
> > + .bInterfaceSubClass =3D 1,
> > + .bInterfaceProtocol =3D 0,
> > + .driver_info =3D UVC_INFO_QUIRK(UVC_QUIRK_INVALID_DE=
VICE_SOF) },
> > /* Logitech Rally Bar Huddle */
> > { .match_flags =3D USB_DEVICE_ID_MATCH_DEVICE
> > | USB_DEVICE_ID_MATCH_INT_INFO,
> > --
> > 2.55.0.508.g3f0d502094-goog
> >
>
>
> --
> Ricardo Ribalda