On Tue, Oct 27, 2015 at 12:21 AM, Hans Verkuil <hverkuil@xxxxxxxxx> wrote: > > > On 10/27/2015 02:04, Ran Shalit wrote: >> On Mon, Oct 26, 2015 at 1:46 PM, Steven Toth <stoth@xxxxxxxxxxxxxx> wrote: >>>> No, use V4L2. What you do with the frame after it has been captured >>>> into memory has no relevance to the API you use to capture into memory. >>> >>> Ran, I've built many open and closed source Linux drivers over the >>> last 10 years - so I can speak with authority on this. >>> >>> Hans is absolutely correct, don't make the mistake of going >>> proprietary with your API. Take advantage of the massive amount of >>> video related frameworks the kernel has to offer. It will get you to >>> market faster, assuming your goal is to build a driver that is open >>> source. If your licensing prohibits an open source driver solution, >>> you'll have no choice but to build your own proprietary API. >>> >>> -- >>> Steven Toth - Kernel Labs >>> http://www.kernellabs.com >> >> Hi, >> >> Thank you very much for these valuable comments. >> If I may ask one more on this issue: >> Is there an example in linux tree, for a pci device which is used both >> as a capture and a display device ? (I've made a search but did not >> find any) >> The PCIe device we are using will be both a capture device and output >> video device (for display). > > The cobalt driver (drivers/media/pci/cobalt) does exactly that: multiple HDMI inputs and an optional HDMI output (through a daughterboard). > > Please note: using V4L2 for an output only makes sense if you will be outputting video, if the goal is to output a graphical desktop then the drm/kms API is much more suitable. > > Regards, > > Hans Hi Hans, Thank you very much for the reference. I see that the cobalt card is not for sale ? If it was it could help us in our development. In our case it is more custom design which is based on FPGA: Cpu ---PCIe---- FPGA <<<-->>> 3xHD+3xSD inputs & 1xHD(or SD) output As I understand there is no product chip which can do the above (3xHD+3xSD inputs & 1xHD(or SD) output), that's why the use of FPGA in the board design. Best Regards, Ran -- 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
