Re: cx23885

[Michael <auslands-kv@gmx.de>]

I've done a diff against 2.6.31, but there are too many differences, so I 
can't easily tell what they have added and what was changed in the 
development between 2.6.21 and 2.6.31.

One thing is clear: They added several "case" instructions with code for the 
MPX-885. So I guess, they really got it working. 

I'm downloading kernel 2.6.21 now and make a diff with these drivers.

Michael

Michael wrote:

> Now comes the best part:
> 
> I found a linux driver on the producers web page. And it is written by ...
> Steven Toth :-)
> 
> http://www.commell.com.tw/Product/Surveillance/MPX-885/mpx-885.rar
> 
> I am looking at the files to see what they have changed (if anything at
> all).
> 
> One thing I found pretty fast is that they added in cx23885-card.c:
> 
> [CX23885_BOARD_MPX885] = {
> .name       = "MPX-885",
>         .porta      = CX23885_ANALOG_VIDEO,
>         .portb      = CX23885_MPEG_ENCODER,
>         .portc      = CX23885_MPEG_DVB,
>         .input          = {{
>             .type   = CX23885_VMUX_COMPOSITE1,
>             .vmux   = CX25840_VIN1_CH1,
>             .gpio0  = 0,
>         }, {
>             .type   = CX23885_VMUX_COMPOSITE2,
>             .vmux   = CX25840_VIN2_CH1,
>             .gpio0  = 0,
>         }, {
>             .type   = CX23885_VMUX_COMPOSITE3,
>             .vmux   = CX25840_VIN3_CH1,
>             .gpio0  = 0,
>         }, {
>             .type   = CX23885_VMUX_COMPOSITE4,
>             .vmux   = CX25840_VIN4_CH1,
>             .gpio0  = 0,
>         } }
> 
> Now, concerning the rest of the code, I'm afraid my knowledge is far below
> what is needed to understand just a little bit of it. I can try to compile
> the code, but they state it is for kernel 2.6.21, so I don't know whether
> it compiles for 2.6.31 (or newer).
> 
> I can try to make a diff, but I guess there will be lots of changes
> between this rather old code and an actual cx23885 version.
> 
> But maybe it is a start. What do you think?
> 
> Michael
> 
> Steven Toth wrote:
> 
>> 
>>> Well if tvtime runs then mplayer will most probably, too. The question
>>> is, what means "with some work" :-)
>> 
>> If you haven't worked on the cx23885 driver in the past, and you're not
>> accustomed to developing tv/video drivers then you're going to struggle,
>> massively.
>> 
>> Not that I'm trying to discourage, on the contrary, the more driver
>> developers the better. In reality this isn't something you can fix with
>> an evenings work.
>> 
>> However, if you would like to take a shot then look at the existing
>> support for the HVR1800 board in the cx23885 tree. Specifically look at
>> the raw video support in the cx23885-video.c file and you'll also want to
>> investigate the cx25840 driver for configuring the A/V subsystem.
>> 
>> Feel free to submit patches.
>> 
>> Regards,
>> 
>> - Steve
>>