Re: Advice wanted on producing an in kernel sq905 driver

[Hans de Goede <j.w.r.degoede@hhs.nl>]

Erik Andrén wrote:
> 2008/11/18 Hans de Goede <j.w.r.degoede@hhs.nl>:
>> Erik Andrén wrote:
>>
>> <snip>
>>
>>>> Correct, there is nothing special you need to do for that, just pass
>>>> frames
>>>> with the raw bayer data to userspace and set the pixelformat to one of:
>>>> V4L2_PIX_FMT_SBGGR8 /* v4l2_fourcc('B', 'A', '8', '1'), 8 bit BGBG..
>>>> GRGR..
>>>> */
>>>> V4L2_PIX_FMT_SGBRG8 /* v4l2_fourcc('G', 'B', 'R', 'G'), 8 bit GBGB..
>>>> RGRG..
>>>> */
>>>> V4L2_PIX_FMT_SGRBG8 /* v4l2_fourcc('G','R','B','G'), 8 bit GRGR.. BGBG..
>>>> */
>>>> V4L2_PIX_FMT_SRGGB8 /* v4l2_fourcc('R','G','G','B'), 8 bit RGRG.. GBGB..
>>>> */
>>>>
>>>> Note the last 2 currently are only defined internally in libv4l and not
>>>> in
>>>> linux/videodev2.h as no drivers use them yet, but if you need one of them
>>>> adding it to linux/videodev2.h is fine.
>>> I'm currently developing a driver where I need the two lower ones in
>>> order to get a correct bayer decoding.
>>> Would it possible to add them into the linux/videodev2.h?
>>>
>>> I can send a patch tonight if required.
>>>
>> It is usual for such patches to be submitted together with the driver using
>> the new defines. Just be sure you define
>> V4L2_PIX_FMT_SGRBG8 as v4l2_fourcc('G','R','B','G')
>> and
>> V4L2_PIX_FMT_SRGGB8 as v4l2_fourcc('R','G','G','B')
>>
>> You can try sending a patch to Mauro as preperation for your driver, but I'm
>> not sure he will take such a patch, he did not accept it from me in the past
>> as no drivers were using them, maybe with a driver on the horizon he will
>> accept such a patch.
>>
> 
> I'm currently in the process of porting the old quickcam driver [1] to
> the gspca framework sofar I have working video using the vv6410
> sensor. Next step is to get the hdcs and pb0100 sensors up to speed.
> The driver will be tracked in
> http://linuxtv.org/hg/~eandren/gspca-stv06xx/ (nothing pushed yet)
> 

Good! and <ugh> I've been working on the same, I'm nowhere near as far as you 
though, can you please put a tarbal or whatever somewhere, then I can see if 
there is anything in my version worth salvaging to improve your driver in some 
points.

I've access to an pb0100 using cam.

Regards,

Hans

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