On Aug 29 18:06:32, lau...@tratt.net wrote:
> Lots of us have to use webcams more than we used to. There have been some
> recent changes in OpenBSD support for webcams that some might find useful.
> Most of the hard work was done by Marcus Glocker, with input from Ingo
> Feinerer, sc.dying, and myself.

Thanks to all! The uvideo on my old MacBook1,1
(dmesg below) is back, for instance.

It attaches in a strange way on boot:

uvideo0 at uhub0 port 4 configuration 1 interface 0 "Apple Computer Bluetooth" 
rev 2.00/0.0c addr 2
uvideo0 detached
uvideo0 at uhub0 port 4 configuration 1 interface 0 "Micron Built-in iSight" 
rev 2.00/1.84 addr 2
video0 at uvideo0

Does the device attach as bluetooth first,
and the kernel later decides it is a camera?

This is how it used to work on these macbooks for me,
and it got broken some weeks ago; now video(4) is back.


$ video -q
video device /dev/video:
  encodings: uyvy
  frame sizes (width x height, in pixels) and rates (in frames per second):
        320x240: 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 
30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30
        352x288: 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 
30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30
        640x480: 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 
30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30
  controls: brightness, saturation, gamma, sharpness

The repetition of the 30 (fps) seems strange
- perhaps there is some quirk in getting the list
of the camera's supported frame rates.


$ video -c
video: VIDIOC_G_CTRL: Invalid argument
brightness=63
saturation=5
gamma=100
sharpness=3


Capturing doesn't work though:

$ video -v
video device /dev/video:
  encodings: uyvy
  frame sizes (width x height, in pixels) and rates (in frames per second):
        320x240: 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 
30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30
        352x288: 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 
30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30
        640x480: 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 
30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30
  controls: brightness, saturation, gamma, sharpness
Xv adaptor 0, Intel(R) Textured Video:
  encodings: yuy2, uyvy, yv12
  max size: 1280x800
using uyvy encoding
using frame size 640x480 (614400 bytes)
using default frame rate
video: VIDIOC_G_CTRL: Invalid argument
video: ioctl VIDIOC_DQBUF: Invalid argument


The first error shows immediately after start,
the camera led lights up, and a black rectangle is shown;
after a few seconds, video(1) emits the second message
and exits with an exit value of 1.

        Jan


OpenBSD 6.8-beta (GENERIC.MP) #0: Wed Sep 23 13:07:51 CEST 2020
    h...@mb32.stare.cz:/usr/src/sys/arch/i386/compile/GENERIC.MP
real mem  = 2113323008 (2015MB)
avail mem = 2058436608 (1963MB)
random: good seed from bootblocks
mpath0 at root
scsibus0 at mpath0: 256 targets
mainbus0 at root
bios0 at mainbus0: date 07/29/05, SMBIOS rev. 2.4 @ 0xe7490 (36 entries)
bios0: vendor Apple Computer, Inc. version "MB11.88Z.0061.B03.0610121324" date 
10/12/06
bios0: Apple Computer, Inc. MacBook1,1
acpi0 at bios0: ACPI 3.0
acpi0: sleep states S0 S3 S4 S5
acpi0: tables DSDT FACP HPET APIC MCFG ASF! SBST ECDT SSDT SSDT SSDT
acpi0: wakeup devices ADP1(S3) LID0(S3) PXS1(S4) PXS2(S4) USB1(S3) USB2(S3) 
USB3(S3) USB4(S3) USB7(S3) EC__(S3)
acpitimer0 at acpi0: 3579545 Hz, 24 bits
acpihpet0 at acpi0: 14318179 Hz
acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat
cpu0 at mainbus0: apid 0 (boot processor)
cpu0: Genuine Intel(R) CPU T2500 @ 2.00GHz ("GenuineIntel" 686-class) 2 GHz, 
06-0e-08
cpu0: 
FPU,V86,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,MWAIT,VMX,EST,TM2,xTPR,PDCM,NXE,PERF,SENSOR,MELTDOWN
mtrr: Pentium Pro MTRR support, 8 var ranges, 88 fixed ranges
cpu0: apic clock running at 166MHz
cpu0: mwait min=64, max=64, C-substates=0.2.2.2.2, IBE
cpu1 at mainbus0: apid 1 (application processor)
cpu1: Genuine Intel(R) CPU T2500 @ 2.00GHz ("GenuineIntel" 686-class) 2 GHz, 
06-0e-08
cpu1: 
FPU,V86,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,MWAIT,VMX,EST,TM2,xTPR,PDCM,NXE,PERF,SENSOR,MELTDOWN
ioapic0 at mainbus0: apid 1 pa 0xfec00000, version 20, 24 pins, remapped
acpimcfg0 at acpi0
acpimcfg0: addr 0xe0000000, bus 0-255
acpiec0 at acpi0
acpiprt0 at acpi0: bus 0 (PCI0)
acpiprt1 at acpi0: bus 1 (RP01)
acpiprt2 at acpi0: bus 2 (RP02)
acpiprt3 at acpi0: bus 3 (PCIB)
acpisbs0 at acpi0: SBS0 model "ASMB016" serial 35580 type LION oem "DP"
acpiac0 at acpi0: AC unit online
acpibtn0 at acpi0: LID0
"APP0002" at acpi0 not configured
acpibtn1 at acpi0: PWRB
acpibtn2 at acpi0: SLPB
"PNP0A08" at acpi0 not configured
asmc0 at acpi0: SMC_ (smc-napa) addr 0x300/0x20: rev 1.4f504, 203 keys
"APP0003" at acpi0 not configured
"ACPI0001" at acpi0 not configured
"IFX0101" at acpi0 not configured
acpicmos0 at acpi0
acpicpu0 at acpi0: !C4(100@55 mwait@0x31), !C3(500@1 mwait@0x20), !C2(500@1 
mwait@0x10), C1(1000@1 mwait), PSS
acpicpu1 at acpi0: !C4(100@55 mwait@0x31), !C3(500@1 mwait@0x20), !C2(500@1 
mwait@0x10), C1(1000@1 mwait), PSS
acpivideo0 at acpi0: GFX0
bios0: ROM list: 0xc0000/0xe600!
cpu0: Enhanced SpeedStep 1998 MHz: speeds: 2000, 1833, 1667, 1500, 1333, 1000 
MHz
memory map conflict 0xe00f8000/0x1000
memory map conflict 0xfed1c000/0x4000
memory map conflict 0xfffb0000/0x30000
pci0 at mainbus0 bus 0: configuration mode 1 (bios)
pchb0 at pci0 dev 0 function 0 "Intel 82945GM Host" rev 0x03
inteldrm0 at pci0 dev 2 function 0 "Intel 82945GM Video" rev 0x03
drm0 at inteldrm0
intagp0 at inteldrm0
agp0 at intagp0: aperture at 0x80000000, size 0x10000000
inteldrm0: apic 1 int 16, I945GM, gen 3
"Intel 82945GM Video" rev 0x03 at pci0 dev 2 function 1 not configured
vendor "Intel", unknown product 0x27a3 (class DASP subclass Time and Frequency, 
rev 0x03) at pci0 dev 7 function 0 not configured
azalia0 at pci0 dev 27 function 0 "Intel 82801GB HD Audio" rev 0x02: msi
azalia0: codecs: Sigmatel STAC9220/1
audio0 at azalia0
ppb0 at pci0 dev 28 function 0 "Intel 82801GB PCIE" rev 0x02: apic 1 int 17
pci1 at ppb0 bus 1
mskc0 at pci1 dev 0 function 0 "Marvell Yukon 88E8053" rev 0x22, Yukon-2 EC 
rev. A3 (0x2): apic 1 int 16
msk0 at mskc0 port A: address 00:16:cb:d0:c4:3c
eephy0 at msk0 phy 0: 88E1111 Gigabit PHY, rev. 2
ppb1 at pci0 dev 28 function 1 "Intel 82801GB PCIE" rev 0x02: apic 1 int 16
pci2 at ppb1 bus 2
ath0 at pci2 dev 0 function 0 "Atheros AR5424" rev 0x01: apic 1 int 17
ath0: AR5424 10.3 phy 6.1 rf 10.2 eeprom 5.3, WORAW, address 00:16:cb:bf:f6:88
uhci0 at pci0 dev 29 function 0 "Intel 82801GB USB" rev 0x02: apic 1 int 21
uhci1 at pci0 dev 29 function 1 "Intel 82801GB USB" rev 0x02: apic 1 int 19
uhci2 at pci0 dev 29 function 2 "Intel 82801GB USB" rev 0x02: apic 1 int 18
uhci3 at pci0 dev 29 function 3 "Intel 82801GB USB" rev 0x02: apic 1 int 16
ehci0 at pci0 dev 29 function 7 "Intel 82801GB USB" rev 0x02: apic 1 int 21
usb0 at ehci0: USB revision 2.0
uhub0 at usb0 configuration 1 interface 0 "Intel EHCI root hub" rev 2.00/1.00 
addr 1
ppb2 at pci0 dev 30 function 0 "Intel 82801BAM Hub-to-PCI" rev 0xe2
pci3 at ppb2 bus 3
"AT&T/Lucent FW322 1394" rev 0x61 at pci3 dev 3 function 0 not configured
ichpcib0 at pci0 dev 31 function 0 "Intel 82801GBM LPC" rev 0x02: PM disabled
pciide0 at pci0 dev 31 function 1 "Intel 82801GB IDE" rev 0x02: DMA, channel 0 
configured to compatibility, channel 1 configured to compatibility
atapiscsi0 at pciide0 channel 0 drive 0
scsibus1 at atapiscsi0: 2 targets
cd0 at scsibus1 targ 0 lun 0: <MATSHITA, DVD-R UJ-857, HBEA> removable
cd0(pciide0:0:0): using PIO mode 4, Ultra-DMA mode 4
pciide0: channel 1 disabled (no drives)
pciide1 at pci0 dev 31 function 2 "Intel 82801GBM SATA" rev 0x02: DMA, channel 
0 configured to native-PCI, channel 1 configured to native-PCI
pciide1: using apic 1 int 19 for native-PCI interrupt
wd0 at pciide1 channel 0 drive 1: <ST960813AS>
wd0: 16-sector PIO, LBA48, 57231MB, 117210240 sectors
wd0(pciide1:0:1): using PIO mode 4, Ultra-DMA mode 5
ichiic0 at pci0 dev 31 function 3 "Intel 82801GB SMBus" rev 0x02: apic 1 int 19
iic0 at ichiic0
spdmem0 at iic0 addr 0x50: 2GB DDR2 SDRAM non-parity PC2-5300CL5 SO-DIMM
usb1 at uhci0: USB revision 1.0
uhub1 at usb1 configuration 1 interface 0 "Intel UHCI root hub" rev 1.00/1.00 
addr 1
usb2 at uhci1: USB revision 1.0
uhub2 at usb2 configuration 1 interface 0 "Intel UHCI root hub" rev 1.00/1.00 
addr 1
usb3 at uhci2: USB revision 1.0
uhub3 at usb3 configuration 1 interface 0 "Intel UHCI root hub" rev 1.00/1.00 
addr 1
usb4 at uhci3: USB revision 1.0
uhub4 at usb4 configuration 1 interface 0 "Intel UHCI root hub" rev 1.00/1.00 
addr 1
isa0 at ichpcib0
isadma0 at isa0
pcppi0 at isa0 port 0x61
spkr0 at pcppi0
npx0 at isa0 port 0xf0/16: reported by CPUID; using exception 16
uvideo0 at uhub0 port 4 configuration 1 interface 0 "Apple Computer Bluetooth" 
rev 2.00/0.0c addr 2
uhidev0 at uhub1 port 2 configuration 1 interface 0 "Apple Inc. Apple Internal 
Keyboard / Trackpad" rev 2.00/0.09 addr 2
uhidev0: iclass 3/1
ukbd0 at uhidev0: 8 variable keys, 5 key codes, country code 13
wskbd0 at ukbd0: console keyboard
uhidev1 at uhub1 port 2 configuration 1 interface 1 "Apple Inc. Apple Internal 
Keyboard / Trackpad" rev 2.00/0.09 addr 2
uhidev1: iclass 3/1, 5 report ids
ums0 at uhidev1 reportid 2: 3 buttons
wsmouse0 at ums0 mux 0
ums1 at uhidev1 reportid 5
ums1: mouse has no X report
uhidev2 at uhub1 port 2 configuration 1 interface 2 "Apple Inc. Apple Internal 
Keyboard / Trackpad" rev 2.00/0.09 addr 2
uhidev2: iclass 3/0
uhid0 at uhidev2: input=1, output=0, feature=0
uhidev3 at uhub3 port 2 configuration 1 interface 0 "Apple Computer, Inc. IR 
Receiver" rev 2.00/1.10 addr 2
uhidev3: iclass 3/0, 38 report ids
uhid1 at uhidev3 reportid 36: input=4, output=0, feature=0
uhid2 at uhidev3 reportid 37: input=4, output=0, feature=0
uhid3 at uhidev3 reportid 38: input=4, output=0, feature=0
uhidev4 at uhub4 port 1 configuration 1 interface 0 "Apple Computer HID-proxy" 
rev 2.00/19.65 addr 2
uhidev4: iclass 3/1
ukbd1 at uhidev4: 8 variable keys, 6 key codes
wskbd1 at ukbd1 mux 1
uhidev5 at uhub4 port 1 configuration 1 interface 1 "Apple Computer HID-proxy" 
rev 2.00/19.65 addr 2
uhidev5: iclass 3/1
ums2 at uhidev5: 5 buttons
wsmouse1 at ums2 mux 0
vscsi0 at root
scsibus2 at vscsi0: 256 targets
softraid0 at root
scsibus3 at softraid0: 256 targets
root on wd0a (d56fb6b19bfb4252.a) swap on wd0b dump on wd0b
inteldrm0: 1280x800, 32bpp
wsdisplay0 at inteldrm0 mux 1: console (std, vt100 emulation), using wskbd0
wskbd1: connecting to wsdisplay0
wsdisplay0: screen 1-5 added (std, vt100 emulation)
uvideo0 detached
uvideo0 at uhub0 port 4 configuration 1 interface 0 "Micron Built-in iSight" 
rev 2.00/1.84 addr 2
video0 at uvideo0

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