Hi all, 2011/1/12 Laurent Pinchart <laurent.pinch...@ideasonboard.com>: > Hi Enric, > > On Wednesday 12 January 2011 12:58:04 Enric Balletbò i Serra wrote: >> Hi all, >> >> As explained in my first mail I would like port the tvp515x driver to >> new media framework, I'm a newbie with the v4l2 API and of course with >> the new media framework API, so sorry if next questions are stupid or >> trivial (please, patience with me). >> >> My idea is follow this link schem: >> >> --------------------------------------- >> -------------------------------------------- >> --------------------- | | | 1 >> >> | ----------> | OMAP3 ISP CCDC OUTPUT | >> | TVP515x | 0 | -----> | 0 | OMAP3 ISP CCDC --- | >> >> -------------------------------------------- >> -------------------- | | | 2 | >> --------------------------------------- > > ASCII art would look much better if you drew it in a non-proportional font, > with 80 character per line at most. > >> Where: >> * TVP515x is /dev/v4l-subdev8 c 81 15 >> * OMAP3 ISP CCDC is /dev/v4l-subdev2 c 81 4 >> * OMAP3 ISP CCDC OUTPUT is /dev/video2 c 81 5 >> >> Then activate these links with >> >> ./media-ctl -r -l '"tvp5150 2-005c":0->"OMAP3 ISP CCDC":0[1], "OMAP3 >> ISP CCDC":1->"OMAP3 ISP CCDC output":0[1]' >> Resetting all links to disabled >> Setting up link 16:0 -> 5:0 [1] >> Setting up link 5:1 -> 6:0 [1] >> >> I'm on the right way or I'm completely lost ? > > That's correct. > >> I think the next step is adapt the tvp515x driver to new media >> framework, I'm not sure how to do this, someone can give some points ? > > You need to implement subdev pad operations. get_fmt and set_fmt are required.
I configured the TVP5151 to 8-bit 4:2:3 YCbCr output format. Is 8-bit 4:2:3 YCbCr output format implemented in OMAP3 ISP CCDC ? > >> Once this is done, I suppose I can test using gstreamer, for example >> using something like this. >> >> gst-launch v4l2src device=/dev/video2 ! ffmpegcolorspace ! xvimagesink >> >> I'm right in this point ? > > You need to specify the format explicitly. It must be identical to the format > configured on pad CCDC:1. Can you give me an example using gstreamer ? Running yavta I get # ./yavta -f SGRBG10 -s 720x525 -n 4 --capture=4 --skip 3 -F /dev/video2 Device /dev/video2 opened: OMAP3 ISP CCDC output (media). Video format set: width: 720 height: 525 buffer size: 756000 Video format: BA10 (30314142) 720x525 4 buffers requested. length: 756000 offset: 0 Buffer 0 mapped at address 0x400f2000. length: 756000 offset: 757760 Buffer 1 mapped at address 0x40385000. length: 756000 offset: 1515520 Buffer 2 mapped at address 0x40466000. length: 756000 offset: 2273280 Buffer 3 mapped at address 0x405ed000. Unable to start streaming: 22. Unable to dequeue buffer (22). 4 buffers released. I know the format is not correct, but, is the "Unable to start streaming: 22" error related to the format or is related to another problem ? Thanks in advance, Enric > > -- > Regards, > > Laurent Pinchart > -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
