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 <gilles@xxxxxxxxxxxxxxx>: > 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 > . > > -- > To unsubscribe from this list: send the line "unsubscribe linux-media" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
