Hi Laurent,
Am Donnerstag, den 16.08.2018, 19:39 +0300 schrieb Laurent Pinchart:
> Hi Christoph,
>
> (Philipp, there's a question for you at the end)
>
> On Thursday, 16 August 2018 15:48:15 EEST Christoph Fritz wrote:
[...]
> > format->fcc = dev->forced_color_format;
> > format->bpp = 8;
> > width_multiplier = 2;
>
> bpp and multiplier are more annoying. bpp is a property of the format, which
> we could add to the uvc_fmts array.
>
> I believe the multiplier could be computed by device bpp / bpp from uvc_fmts.
> That would work at least for the Oculus VR Positional Tracker DK2, but I don't
> have the Oculus VR Rift Sensor descriptors to check that. Philipp, if you
> still have access to the device, could you send that to me ?
Full lsusb -v output below, the UVC descriptors are not decoded because
bFunctionClass is set to 255. The YUY2 uncompressed format descriptor
looks like this:
___guidFormat__________________________________
1b 24 04 01 04 59 55 59 32 00 00 10 00 80 00 00 aa 00 38 9b 71 10 01 00 00 00 00
^^
so, bBitsPerPixel == 16.
----------8<----------
$ lsusb -d 2833:0211 -v
Bus 003 Device 002: ID 2833:0211
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 3.00
bDeviceClass 239 Miscellaneous Device
bDeviceSubClass 2 ?
bDeviceProtocol 1 Interface Association
bMaxPacketSize0 9
idVendor 0x2833
idProduct 0x0211
bcdDevice 0.00
iManufacturer 1 Oculus VR
iProduct 2 Rift Sensor
iSerial 3 WMTD303N602SK6
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 342
bNumInterfaces 2
bConfigurationValue 1
iConfiguration 0
bmAttributes 0x80
(Bus Powered)
MaxPower 200mA
Interface Association:
bLength 8
bDescriptorType 11
bFirstInterface 0
bInterfaceCount 2
bFunctionClass 255 Vendor Specific Class
bFunctionSubClass 3
bFunctionProtocol 0
iFunction 4 CV1 External Camera
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 1
bInterfaceProtocol 0
iInterface 4 CV1 External Camera
** UNRECOGNIZED: 0d 24 01 00 01 4e 00 00 5a 62 02 01 01
** UNRECOGNIZED: 12 24 02 01 01 02 00 00 00 00 00 00 00 00 03 0e 00 00
** UNRECOGNIZED: 09 24 03 02 01 01 00 04 00
** UNRECOGNIZED: 0b 24 05 03 01 00 00 02 7f 14 00
** UNRECOGNIZED: 1b 24 06 04 ad cc b1 c2 f6 ab b8 48 8e 37 32 d4 f3 a3 fe ec 05 01 03 02 06 0e 00
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0020 1x 32 bytes
bInterval 11
bMaxBurst 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 0
bNumEndpoints 0
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 2
bInterfaceProtocol 0
iInterface 0
** UNRECOGNIZED: 0e 24 01 01 a7 00 81 00 02 00 01 01 01 00
** UNRECOGNIZED: 1b 24 04 01 04 59 55 59 32 00 00 10 00 80 00 00 aa 00 38 9b 71 10 01 00 00 00 00
** UNRECOGNIZED: 1e 24 05 01 00 80 02 d0 02 00 00 5e 1a 00 00 5e 1a 00 10 0e 00 3a c6 02 00 01 3a c6 02 00
** UNRECOGNIZED: 1e 24 05 02 00 e0 01 40 02 00 00 bb 17 00 00 bb 17 00 70 08 00 07 b2 01 00 01 07 b2 01 00
** UNRECOGNIZED: 1e 24 05 03 00 e0 01 c0 03 00 00 bb 17 00 00 bb 17 00 10 0e 00 61 d3 02 00 01 61 d3 02 00
** UNRECOGNIZED: 1e 24 05 04 00 80 02 c0 03 00 00 4c 1d 00 00 4c 1d 00 c0 12 00 40 0d 03 00 01 40 0d 03 00
** UNRECOGNIZED: 06 24 0d 01 01 04
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 1
bNumEndpoints 1
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 2
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 0x0400 1x 1024 bytes
bInterval 1
bMaxBurst 7
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 2
bNumEndpoints 1
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 2
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 0x0400 1x 1024 bytes
bInterval 1
bMaxBurst 15
Binary Object Store Descriptor:
bLength 5
bDescriptorType 15
wTotalLength 22
bNumDeviceCaps 2
USB 2.0 Extension Device Capability:
bLength 7
bDescriptorType 16
bDevCapabilityType 2
bmAttributes 0x00000006
Link Power Management (LPM) Supported
SuperSpeed USB Device Capability:
bLength 10
bDescriptorType 16
bDevCapabilityType 3
bmAttributes 0x00
wSpeedsSupported 0x000e
Device can operate at Full Speed (12Mbps)
Device can operate at High Speed (480Mbps)
Device can operate at SuperSpeed (5Gbps)
bFunctionalitySupport 1
Lowest fully-functional device speed is Full Speed (12Mbps)
bU1DevExitLat 4 micro seconds
bU2DevExitLat 4 micro seconds
Device Status: 0x000c
(Bus Powered)
U1 Enabled
U2 Enabled
---------->8----------
regards
Philipp
