82xx-HCI-USB & Webcams / PWC

82xx-HCI-USB & Webcams / PWC

[Absolut Hunter]

All,

I realize mostly this topic is probably best reserved for the video4linux
mailing list, but my question is more regarding just if anyone has had
success with the default kernel options with no modifications... 

Or perhaps if my issue relates to USB driver performance... Read on.

Has anyone attempted to use the Phillips web cam driver, pwc.o, that is
built into the standard 2.4.25 DENX kernel? I think its version 8.x
something.

I have been attempting to use a console based capture program to just see if
I can get low resolution captures to work. I have installed the 82xx-HCI usb
driver, have got all the v4l, and PWC kernel modules installed and
everything is recognized. 

I am able to capture some video images, but always have like 50% or better
image corruption, like horizontal green/pink stripes across the video image,
or pure green static. I was curious if anyone had tried this. I know some
other folks have had problems with USB data integrity using this usb driver,
especially under high loads like a usb camera might provide.

Anyone tried this?

I have successfully gotten mice and keyboards to work under this USB driver
so it seems to work at low data rates.

-Russ

Re: 82xx-HCI-USB & Webcams / PWC

[Wolfgang Denk]

Hello,

in message <003101c5fcf5$1ff05b80$6405a8c0@absolut> you wrote:
> 
> Has anyone attempted to use the Phillips web cam driver, pwc.o, that is
> built into the standard 2.4.25 DENX kernel? I think its version 8.x
> something.

The current code uses version 10.0.7a of the driver. This driver  has
been  tested  on  several  MPC5200  based systems (plain old IceCube,
TQM5200, and custom hardware). It works fine there.

> Anyone tried this?

We did, and it works fine. [Make sure to use current code, i. e. commit
e09474c3e0963b58470b447ab25188499e5c4af1 or later; see
http://www.denx.de/cgi-bin/gitweb.cgi?p=linuxppc_2_4_devel.git;a=commit;h=e09474c3e0963b58470b447ab25188499e5c4af1

See also  Documentation/README.webcam inthe source tree.

Best regards,

Wolfgang Denk

-- 
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd@denx.de
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