Re: TS-7800 ioctl issues while using v4l and webcams

Hello Andrew,

Here is a simple strace of setpwc, a software to get the webcam info.

It's working fine on the dev machine and TS7300 but not on the TS7800.
I don't see anything wrong on the TS7300 trace except the ioctl
errors.

>From the TS7800:

rootts7800:root# strace setpwc -p
execve("/usr/bin/setpwc", ["setpwc", "-p"], [/* 13 vars */]) = 0
uname({sys="Linux";, node=";ts7800", ...}) = 0
brk(0) = 0x14000
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or
directory)
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -
1, 0) = 0x40015000
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or
directory)
open("/etc/ld.so.cache", O_RDONLY) = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=14176, ...}) = 0
mmap2(NULL, 14176, PROT_READ, MAP_PRIVATE, 3, 0) = 0x40016000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or
directory)
open("/lib/libc.so.6", O_RDONLY) = 3
read(3, "177ELF111a03(10HO10004"...,
512) = 512
fstat64(3, {st_mode=S_IFREG|0755, st_size=1091040, ...}) = 0
mmap2(NULL, 1128068, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE,
3, 0) = 0x4001e000
mprotect(0x40125000, 50820, PROT_NONE) = 0
mmap2(0x4012c000, 12288, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x106) = 0x4012c000
mmap2(0x4012f000, 9860, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x4012f000
close(3) = 0
mprotect(0x4012c000, 8192, PROT_READ) = 0
mprotect(0x4001c000, 4096, PROT_READ) = 0
munmap(0x40016000, 14176) = 0
write(2, "setpwc v1.1, (C) 2003-2005 by fo"..., 53setpwc v1.1, (C)
2003-2005 by folkert%40vanheusden.com">folkertvanheusden.com
) = 53
open("/dev/video0";, O_RDWR) = 3
ioctl(3, EXT2_IOC_GETVERSION or VIDIOCGCAP, 0xbefd2d04) = 0
fstat64(1, {st_mode=S_IFCHR|0600, st_rdev=makedev(4, 64), ...}) = 0
ioctl(1, SNDCTL_TMR_TIMEBASE or TCGETS, {B115200 opost isig icanon
echo ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -
1, 0) = 0x40016000
write(1, "Current device: Logitech QuickCa"..., 39Current device:
Logitech QuickCam Zoom
) = 39
ioctl(3, 0x802476c7, 0xbefd2d40) = 0
write(1, "VIDIOCPWCPROBE returns: Logitech"..., 53VIDIOCPWCPROBE
returns: Logitech QuickCam Zoom - 740
) = 53
ioctl(3, 0x802076c6, 0xbefd2d64) = -1 EINVAL (Invalid argument)
write(2, "Error while doing ioctl VIDIOCPW"..., 59Error while doing
ioctl VIDIOCPWCGSERIAL: Invalid argument
) = 59
write(1, "Serial number: 2021n";, 18Serial number:
) = 18
ioctl(3, SONYPI_IOCSBLUE or VIDIOCGWIN, 0xbefd2d84) = 0
write(1, "Resolution (x, y): 176, 144n", 28Resolution (x, y): 176,
144
) = 28
write(1, "Offset: 0, 0n", 13Offset: 0, 0
) = 13
write(1, "Framerate: 10n", 14Framerate: 10
) = 14
ioctl(3, VIDIOCGPICT, 0xbefd2dc8) = -1 EINVAL (Invalid argument)
write(2, "Error while doing ioctl VIDIOCGP"..., 54Error while doing
ioctl VIDIOCGPICT: Invalid argument
) = 54
write(1, "Brightness: 11812n", 18Brightness: 11812
) = 18
write(1, "Hue: 48893n", 11Hue: 48893
) = 11
write(1, "Colour: 12624n", 14Colour: 12624
) = 14
write(1, "Contrast: 1n", 12Contrast: 1
) = 12
write(1, "Whiteness: 2n", 13Whiteness: 2
) = 13
write(1, "Palette: Unknown! (39720)n", 26Palette: Unknown! (39720)
) = 26
ioctl(3, MEYEIOC_SYNC, 0xbefd2dec) = 0
write(1, "Compression preference: 1n", 26Compression preference: 1
) = 26
ioctl(3, 0x800476c8, 0xbefd2dec) = 0
write(1, "Automatic gain control: -2502n", 30Automatic gain
control: -2502
) = 30
ioctl(3, 0x801476ca, 0xbefd2da4) = 0
write(1, "Whitebalance mode: auton";, 24Whitebalance mode: auto
) = 24
ioctl(3, 0x800876cd, 0xbefd2de4) = -1 EPIPE (Broken pipe)
write(1, "Blinking of LED is not supported"..., 52Blinking of LED is
not supported by the combination
) = 52
write(1, "of your webcam and the driver.n", 31of your webcam and the
driver.
) = 31
ioctl(3, 0x800476ce, 0xbefd2dec) = 0
write(1, "Sharpness: -1n", 14Sharpness: -1
) = 14
ioctl(3, 0x800476cf, 0xbefd2dec) = 0
write(1, "Backlight compensation mode: onn", 32Backlight
compensation mode: on
) = 32
ioctl(3, 0x800476d0, 0xbefd2dec) = 0
write(1, "Anti-flicker mode: onn", 22Anti-flicker mode: on
) = 22
ioctl(3, 0x800476d1, 0xbefd2dec) = 0
write(1, "Noise reduction mode: 2 n", 25Noise reduction mode: 2
) = 25
ioctl(3, 0x801076d3, 0xbefd2db8) = -1 ENXIO (No such device or
address)
write(1, "Pan/tilt range is not supported "..., 51Pan/tilt range is
not supported by the combination
) = 51
write(1, "of your webcam and the driver.n", 31of your webcam and the
driver.
) = 31
ioctl(3, 0x800c76d4, 0xbefd2dd8) = -1 ENXIO (No such device or
address)
write(1, "Get pan/tilt position is not sup"..., 58Get pan/tilt
position is not supported by the combination
) = 58
write(1, "of your webcam and the driver.n", 31of your webcam and the
driver.
) = 31
close(3) = 0
munmap(0x40016000, 4096) = 0
io_submit(0, 0, 0x8 <unfinished ... exit status 0>
Process 978 detached

>From a working 2.6:

robotdev:/home/interdit# strace setpwc -p
execve("/usr/bin/setpwc", ["setpwc", "-p&quot;], [/* 28 vars */]) = 0
uname({sys="Linux";, node=";robotdev&quot;, ...}) = 0
brk(0) = 0x804d000
access(&quot;/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or
directory)
mmap2(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -
1, 0) = 0xb7f6c000
access(&quot;/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or
directory)
open("/etc/ld.so.cache", O_RDONLY) = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=49616, ...}) = 0
mmap2(NULL, 49616, PROT_READ, MAP_PRIVATE, 3, 0) = 0xb7f5f000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or
directory)
open("/lib/tls/i686/cmov/libc.so.6", O_RDONLY) = 3
read(3, "177ELF11103310240O1&quot;...,
512) = 512
fstat64(3, {st_mode=S_IFREG|0644, st_size=1241392, ...}) = 0
mmap2(NULL, 1247388, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE,
3, 0) = 0xb7e2e000
mmap2(0xb7f55000, 28672, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x127) = 0xb7f55000
mmap2(0xb7f5c000, 10396, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xb7f5c000
close(3) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -
1, 0) = 0xb7e2d000
mprotect(0xb7f55000, 20480, PROT_READ) = 0
set_thread_area({entry_number:-1 -> 6, base_addr:0xb7e2d8e0,
limit:1048575, seg_32bit:1, contents:0, read_exec_only:0,
limit_in_pages:1, seg_not_present:0, useable:1}) = 0
munmap(0xb7f5f000, 49616) = 0
write(2, "setpwc v1.1, (C) 2003-2005 by fo"..., 53setpwc v1.1, (C)
2003-2005 by folkert%40vanheusden.com">folkertvanheusden.com
) = 53
open("/dev/video0";, O_RDWR) = 3
ioctl(3, EXT2_IOC_GETVERSION or VIDIOCGCAP, 0xbfc68630) = 0
fstat64(1, {st_mode=S_IFCHR|0620, st_rdev=makedev(136, 1), ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -
1, 0) = 0xb7f6b000
write(1, "Current device: Logitech QuickCa&quot;..., 39Current device:
Logitech QuickCam Zoom
) = 39
ioctl(3, 0x802476c7, 0xbfc6866c) = 0
write(1, "VIDIOCPWCPROBE returns: Logitech&quot;..., 53VIDIOCPWCPROBE
returns: Logitech QuickCam Zoom - 740
) = 53
ioctl(3, 0x801e76c6, 0xbfc686b2) = 0
write(1, "Serial number: n", 16Serial number:
) = 16
ioctl(3, SONYPI_IOCSBLUE or VIDIOCGWIN, 0xbfc68690) = 0
write(1, "Resolution (x, y): 320, 240n", 28Resolution (x, y): 320,
240
) = 28
write(1, "Offset: 0, 0n", 13Offset: 0, 0
) = 13
write(1, "Framerate: 10n", 14Framerate: 10
) = 14
ioctl(3, VIDIOCGPICT, 0xbfc686f6) = 0
write(1, "Brightness: 32256n&quot;, 18Brightness: 32256
) = 18
write(1, "Hue: 65535n&quot;, 11Hue: 65535
) = 11
write(1, "Colour: 32768n&quot;, 14Colour: 32768
) = 14
write(1, "Contrast: 32768n&quot;, 16Contrast: 32768
) = 16
write(1, "Whiteness: 49152n&quot;, 17Whiteness: 49152
) = 17
write(1, "Palette: YUV 4:2:0 Planarn&quot;, 26Palette: YUV 4:2:0 Planar
) = 26
ioctl(3, MEYEIOC_SYNC, 0xbfc68718) = 0
write(1, "Compression preference: 1n", 26Compression preference: 1
) = 26
ioctl(3, 0x800476c8, 0xbfc68718) = 0
write(1, "Automatic gain control: -3320n&quot;, 30Automatic gain
control: -3320
) = 30
ioctl(3, 0x801476ca, 0xbfc686d0) = 0
write(1, "Whitebalance mode: auton";, 24Whitebalance mode: auto
) = 24
ioctl(3, 0x800876cd, 0xbfc68710) = -1 EPIPE (Broken pipe)
write(1, "Blinking of LED is not supported&quot;..., 52Blinking of LED is
not supported by the combination
) = 52
write(1, "of your webcam and the driver.n&quot;, 31of your webcam and the
driver.
) = 31
ioctl(3, 0x800476ce, 0xbfc68718) = 0
write(1, "Sharpness: -1n", 14Sharpness: -1
) = 14
ioctl(3, 0x800476cf, 0xbfc68718) = 0
write(1, "Backlight compensation mode: onn", 32Backlight
compensation mode: on
) = 32
ioctl(3, 0x800476d0, 0xbfc68718) = 0
write(1, "Anti-flicker mode: onn", 22Anti-flicker mode: on
) = 22
ioctl(3, 0x800476d1, 0xbfc68718) = 0
write(1, "Noise reduction mode: 2 n", 25Noise reduction mode: 2
) = 25
ioctl(3, 0x801076d3, 0xbfc686e4) = -1 ENXIO (No such device or
address)
write(1, "Pan/tilt range is not supported "..., 51Pan/tilt range is
not supported by the combination
) = 51
write(1, "of your webcam and the driver.n&quot;, 31of your webcam and the
driver.
) = 31
ioctl(3, 0x800c76d4, 0xbfc68704) = -1 ENXIO (No such device or
address)
write(1, "Get pan/tilt position is not sup"..., 58Get pan/tilt
position is not supported by the combination
) = 58
write(1, "of your webcam and the driver.n&quot;, 31of your webcam and the
driver.
) = 31
close(3) = 0
munmap(0xb7f6b000, 4096) = 0
exit_group(0) = ?
Process 6189 detached

Thanks,
Francois

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