gatos-devel Mailing List for GATOS

tovis wrote:

> Yes, I'm affraid that it is taking to many work, may be need completelly
> rewrite the driver.

Probably not, v4l2 driver in gatos CVS would need no work or only
minimal work.

> I have been contacted with original developper -
> Vladimir Dergachev, and he told that also have no time for this project.

v4l2 port was done by Eric Sellers. Also Bogdan Diaconescu made a lot of
work in Radeon support. You may find more info in archives of this
list.

> Also I'm affraid it is quite old hardware, no one intrested in it.

Yes, it's true. My GATOS R128 port is waiting in Xorg bugzilla more than
one year for review.

> Also need more information about hardware, especially for using of
> interrupts (DMA seem to be built in).

Yes, important technical documentation is missing. Some values need to
be written to registers say 8 times before being accepted. Developers
have no information, why it happens. Maybe there is a cyclic buffer,
maybe there is a programming window time, maybe it is a simple delay.

Maybe it would be sufficient to send some of DMA programming data more
times and things will start to work. Who knows.

Actually, following things are broken in R128 support:
- Broken capture (km driver).
- Unwanted cursor display mode changes after use of XVideo.
- XVideo problems after video mode change via XRandR.
- Automatic switching between stereo and bi-lingual broadcasting.
- No support for iDCT, hardware motion compensation.

> Also I have only one old card ATI Radeon 9000 - surplus.

Radeon may work better and km driver was probably working for it.
I have All-In-Wonder R128.


________________________________________________________________________
Stanislav Brabec
http://www.penguin.cz/~utx

> tovis wrote:
>> Hi!
>>
>> Recently I have downloaded and try to compile km driver to use with
>> Radeon
>> card equipped witha Theatre chip (it is working with xorg driver, but in
>> this case grab can not be used). There where many errors.
>> My box is powered using Debian Etch, kernel 2.6.18-6-686. gcc is 4.1
>> After some digging I realized that km is written for video4linux 1 and
>> using compatibility header file linux/videodev.h and includeing the next
>> generation video4linux 2 header linux/videodev2.h but structure
>> "video_device" does not include any of them. km using that structure,
>> and
>> gcc complain about it.
>> What should I do, to get working driver?
>
> Yes, km supports only v4l1. But gatos CVS contains directory v4l2 with
> v4l2 driver. They are not fully featured drivers. They support only
> capture, for all other settings they depend on X11 (tuner and source
> setting etc.)
>
> I never made it any of them fully working. At least for R128, it lacks
> interrupts and kernel disables IRQ after 100000 unhandled interrupts
> (~5-20 minutes, it was probably happening since first days, but up to
> Linux 2.5 these interrupts were silently slowing down the system).
>
Yes, I'm affraid that it is taking to many work, may be need completelly
rewrite the driver. I have been contacted with original developper -
Vladimir Dergachev, and he told that also have no time for this project.
Also I'm affraid it is quite old hardware, no one intrested in it.
Also need more information about hardware, especially for using of
interrupts (DMA seem to be built in).
Also I have only one old card ATI Radeon 9000 - surplus.
Also I have no experience in device driver writing for Linux.
Too many wholes :(
>
> ________________________________________________________________________
> Stanislav Brabec
> http://www.penguin.cz/~utx
>
>
>

tovis wrote:
> Hi!
> 
> Recently I have downloaded and try to compile km driver to use with Radeon
> card equipped witha Theatre chip (it is working with xorg driver, but in
> this case grab can not be used). There where many errors.
> My box is powered using Debian Etch, kernel 2.6.18-6-686. gcc is 4.1
> After some digging I realized that km is written for video4linux 1 and
> using compatibility header file linux/videodev.h and includeing the next
> generation video4linux 2 header linux/videodev2.h but structure
> "video_device" does not include any of them. km using that structure, and
> gcc complain about it.
> What should I do, to get working driver?

Yes, km supports only v4l1. But gatos CVS contains directory v4l2 with
v4l2 driver. They are not fully featured drivers. They support only
capture, for all other settings they depend on X11 (tuner and source
setting etc.)

I never made it any of them fully working. At least for R128, it lacks
interrupts and kernel disables IRQ after 100000 unhandled interrupts
(~5-20 minutes, it was probably happening since first days, but up to
Linux 2.5 these interrupts were silently slowing down the system).


________________________________________________________________________
Stanislav Brabec
http://www.penguin.cz/~utx

Hi!

Recently I have downloaded and try to compile km driver to use with Radeon
card equipped witha Theatre chip (it is working with xorg driver, but in
this case grab can not be used). There where many errors.
My box is powered using Debian Etch, kernel 2.6.18-6-686. gcc is 4.1
After some digging I realized that km is written for video4linux 1 and
using compatibility header file linux/videodev.h and includeing the next
generation video4linux 2 header linux/videodev2.h but structure
"video_device" does not include any of them. km using that structure, and
gcc complain about it.
What should I do, to get working driver?

(I'm familiar in C programming but doesn't familiar with driver
programming at all)