Re: [Linux-usb-users] USB stream from camcorder Sony DCR-HC40(E)

[Luc Dijon]

Alan Stern wrote:
On Sun, 25 Jul 2004, Luc Dijon wrote:
 

That's very good news. It means that patch solved the problem of your
device not being detected and initialized.  I will discuss the patch with 
other USB developers, and we'll settle on a version to submit for the 
official kernel.

The questions about why the video driver isn't loaded and whether the 
audio driver is being loaded correctly can now be worked on separately.  
From your log it looks like things are happening the way they should, but 
there might be some problems in the audio/video drivers or the hotplug 
system.  Maybe someone else can try to solve those.

Alan Stern

 

Thanks Alan,
Simply Great Job !
The device is properly detected on the USB hub.
Next Step: Trying to match the "nearest" Web cam module:
Hotplug fails to load the right video driver because it has no description of such a device and 
load only the Sound driver. It makes sense. I created an entry in hotplug config to force its 
detection and a mapping on the pwc module. Why pwc ? It seems to be the most "generic 
module"..and it contains some references to Some Sony Sensors. The DCR-HC40 is a Sony :-).
I tried to add a description in pwc-if of the device by adding
something like USB_DEVICE(0x054c,0x00c0) in the list of well known devices by PWC. Ok. 

Then, the next problem was to assign "right device type" to recognize the "sensor id" and so 
on..... I modified a bit pwc-if.c. I made 2 tests. One with a type <675 and another with a type 
>730...Bang ! no more success :-o. Both tests failed on the detection of the sensor_id.
Here are some traces of the pwc module I tried to modify a bit:
Jul 25 22:52:19 bikini kernel: usb 1-1: new full speed USB device using address 5
Jul 25 22:52:19 bikini kernel: usb 1-1: skipped 3 descriptors after interface
Jul 25 22:52:19 bikini kernel: usb 1-1: skipped 2 descriptors after interface
Jul 25 22:52:19 bikini kernel: usb 1-1: skipped 1 descriptor after endpoint
Jul 25 22:52:19 bikini kernel: usb 1-1: new device strings: Mfr=0, Product=0, 
SerialNumber=0
Jul 25 22:52:19 bikini kernel: usb 1-1: hotplug
Jul 25 22:52:19 bikini kernel: usb 1-1: adding 1-1:1.0 (config #1, interface 0)
Jul 25 22:52:19 bikini kernel: usb 1-1:1.0: hotplug
Jul 25 22:52:19 bikini kernel: Philips webcam 1-1:1.0: usb_probe_interface
Jul 25 22:52:19 bikini kernel: Philips webcam 1-1:1.0: usb_probe_interface - got id
Jul 25 22:52:19 bikini kernel: pwc probe() called [054C 00C0], if 0
Jul 25 22:52:19 bikini kernel: pwc Sony Camcorder DCR-HC40E
Jul 25 22:52:19 bikini kernel: pwc Device serial number is
Jul 25 22:52:19 bikini kernel: pwc Release: 0100
Jul 25 22:52:19 bikini kernel: pwc Registered as /dev/video0.
Jul 25 22:52:19 bikini kernel: pwc probe() function returning struct at 0xf700f000.
Jul 25 22:52:19 bikini kernel: usb 1-1: adding 1-1:1.1 (config #1, interface 1)
Jul 25 22:52:19 bikini kernel: usb 1-1:1.1: hotplug
Jul 25 22:52:19 bikini kernel: snd-usb-audio 1-1:1.1: usb_probe_interface
Jul 25 22:52:19 bikini kernel: snd-usb-audio 1-1:1.1: usb_probe_interface - got id
Jul 25 22:52:19 bikini kernel: usb 1-1: adding 1-1:1.2 (config #1, interface 2)
Jul 25 22:52:19 bikini kernel: usb 1-1:1.2: hotplug
Jul 25 22:52:53 bikini kernel: pwc >> video_open called(vdev = 0xf700f000).
Jul 25 22:52:53 bikini kernel: pwc Doing first time initialization.
Jul 25 22:52:53 bikini kernel: pwc Sony Sensor ID: ffffffe0<6>
Jul 25 22:52:53 bikini kernel: pwc This Sony Camcorder DCR-HC40E
Jul 25 22:52:53 bikini kernel:  camera is equipped with a unknown type of sensor (-32).
Jul 25 22:52:53 bikini kernel: pwc Failed to set video mode [EMAIL PROTECTED] fps; 
return code = -32
Jul 25 22:52:53 bikini kernel: pwc First attempt at set_video_mode failed.
Any other hint from a USB WebCam Master :-) ?
Thanks again to all of you for your support.
Ciao, ciao,
Luc
-----
Luc Dijon
GPG Key at http://www.keyserver.net
pub  1024D/89954CF7 2004-04-08 Luc Dijon <[EMAIL PROTECTED]>

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