Hi Gilles,
If you want to write a driver for blackfin, you can visit
http://blackfin.uclinux.org/ and find linux kernel repo url.
I have written a blackfin bridge driver, vs6624 sensor driver and
adv7183 decoder driver. You can reference vs6624 driver.
I didn't use soc camera framework because it can't support decoder well.
These patch hasn't uploaded to mainline, I hope it is helpful for you.
Regards,
Scott
2011/8/24 Gilles <gil...@gigadevices.com>:
> Folks,
>
> I am currently trying to add V4L2 SOC Camera support for an embedded board
> (Blackfin 527 EZKIT-V2).
> Trying to learn from the few existing examples and was wondering if anyone
> could shed some light on this:
>
> More specifically, I'm looking at:
>
> arch/sh/boards/mach-ap325rxa/setup.c
>
> arch/arm/mach-mx3/mach-pcm037.c
> drivers/media/video/mx3_camera.c
>
> I have the feeling that mx3 appears to be incomplete (or untested?) because
> of this statement in
>
> static int __devinit mx3_camera_probe(struct platform_device *pdev)
> {
> [...]
> soc_host = &mx3_cam->soc_host;
>
> Where mx3->soc_host appears to never be initialized since it's allocation
> (followed by a memzero).
>
> Anyway, my question is: the ap325 board setup appears to do the job without a
> dedicated SOC driver.
> Am I reading this correctly or is there a SOC driver for the ap325 I'm not
> seeing?
>
> This is all so very hard with the total lack of comments in the code as well
> as the convoluted Kconfig/makefiles.
>
> I'd appreciate any help anyone is willing to offer. Even after reading
> soc-camera.txt and a few others I still don't know what is *really* necessary.
>
>
> I've pretty much come to the conclusion that in order to add SOC support for
> camera on a board I need to:
>
> 1) add a I2C_BOARD_INFO entry with the camera I2C address (in the board
> specific setup based on the appropriate CONFIG_...)
>
> 2) add a soc_camera_link for the camera sensor with that I2C info.
>
> [...]
>
> )) Add the device in the board __init. In my case in
> arch/blackfin/mach-bf527/boards/ezkit.c in __init ezkit_init()
>
> add a call to platform_add_device
>
> I know I'm missiong a lot of pieces to this puzzle.
> I'm seeing other boards allocate DMA regions first and then only add the
> camera if it succeeded.
> Then I'm seeing the ap325 which creates TWO soc_camera_link (I'm assuming one
> is for the SOC driver which does not exist elsewhere?...)
>
> Can anyone please shed some light on all this or point me to a SOC drivers
> for dummy document I may have missed???
>
> I'd appreciate any input anyone is willing to lend.
>
> Thanks,
> Gilles
> .
>
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