[mpeg2] cat /dev/video is stuck in read()

[Mathias Kretschmer <mathias@research.att.com>]

Hi guys,

The latest driver I got from the CVS server seems to load fine into my
kernel (2.4.4-ac2) and the MD5 checksums seem to be correct. I'm running a
ASUS A7M266 mobo with a VIA chipset. Since the machine doesn't freeze it
does not seem to cause trouble (I tried it on a i815 mobo, and had exactly
the same problem reading from the device).

Now, when I do a 'cat /dev/video', 'cat' seems to be stuck. Using 'strace' I
get the following:

open("/dev/video", O_RDONLY|O_LARGEFILE) = 3
fstat64(3, {st_mode=S_IFCHR|0600, st_rdev=makedev(81, 0), ...}) = 0
brk(0x804f000)                          = 0x804f000
read(3,  <unfinished
...>                                                                               

What could be the problem ?   

I did a 'make insmod' first, but since I do not have a PAL signal it did not
work (also stuck in read()). Then I tried to load the driver as follows:

insmod kfir.o streamtype=4 vidrate=6000000 vidinmode=1 vidoutmode=1
              vidinput=0 loaded=1


This should set the input to NTSC/Composite and put out MPEG Transport at 6
Mbit/s. (I tried different streamtypes and datarates - no luck).

My video source is a camera that seems to produce a valid NTSC signal - if I
attach it to a monitor, the picture looks ok.

Any ideas ?

Thanks,

Mathias



Some info about my machine:

[root@descant driver]# cat /proc/interrupts
           CPU0
  0:     304672          XT-PIC  timer
  1:      13382          XT-PIC  keyboard
  2:          0          XT-PIC  cascade
  8:          1          XT-PIC  rtc
 10:          2          XT-PIC  envy24
 11:     113823          XT-PIC  eth0
 12:      47063          XT-PIC  PS/2 Mouse
 14:      10346          XT-PIC  aic7xxx
 15:          7          XT-PIC  kfir
NMI:          0
ERR:         
0                                                                                         

[dmesg snipset]
i2c-core.o: driver SAA7113 registered.
saa7113: init_module
kfir: Kfir board revision 5e
loaded microcode with length 32385
kfir: Reset Altera
kfir: done
kfir: Reset Kfir and PLL ... done
kfir: ADSP loading successful
kfir: ADSP initialization...done
kfir: segment: 0  Done
kfir: segment: 1  Done
kfir: segment: 2  Done
kfir: segment: 3  Done
kfir: segment: 4  Done
kfir: segment: 5  Done
kfir: Download parameters...kfir: done
i2c-dev.o: Registered 'kfir #0' as minor 0
saa7113: version=11
saa7113: attaching SAA7113 at 0x4a
kfir: saa7113 decoder attached
kfir: i2c attach [SAA7113]
i2c-core.o: client [SAA7113] registered to adapter [kfir #0](pos. 0).
saa7113: status=a5
saa7113: attached to adapter kfir #0
i2c-core.o: adapter kfir #0 registered as adapter 0.
kfir: Found i2c device at: 0x4a
kfir: decoder
status=b                                                                                  
eready=00200001
eready=00200000 
                                                                                        
[root@descant driver]# lsmod
Module                  Size  Used by
kfir                  200688   0
saa7113                 2512   0  (unused)
envy24                 39984   0
audiobuf               11536   0  [envy24]
uart401                 7808   0  [envy24]
pnp                    49456   0  [envy24]
midi                   29360   0  [uart401 pnp]
ac97                    6400   0  [envy24]
soundbase             341296   0  [envy24 audiobuf uart401 pnp midi ac97]
sndshield              10704   0  [envy24 audiobuf uart401 pnp midi ac97
soundbase]
3c59x                  23680   1 
(autoclean)