Erik Andrén wrote: > > Dongsoo, Nathaniel Kim wrote: >> Hello, >> >> It has been years I've working on linux multimedia drivers, but what a >> shame I found that there were already sensor drivers that I've already >> implemented. Precisely speaking, soc camera devices from Samsung named >> s5k4aa* and s5k83a* were already in Linux kernel and even seems to >> have been there for years. >> But a thing that I'm curious is those drivers are totally mc602 and >> gspca oriented. So some users who are intending to use those samsung >> camera devices but not using gspca and mc5602 H/W have to figure out >> another way. >> As you know, the s5k* camera devices are actually ISP devices which >> are made in SoC device and can be used independently with any kind of >> ITU or MIPI supporting host devices. >> However, I see that gspca and mc5602 have their own driver structure >> so it seems to be tough to split out the sensor drivers from them. >> So, how should we coordinate our drivers if a new s5k* driver is >> getting adopted in the Linux kernel? different version of s5k* drivers >> in gspca and subdev or gspca also is able to use subdev drivers? >> I am very willing to contribute several drivers for s5k* soc camera >> isp devices and in the middle of researching to prepare for >> contribution those s5k* drivers popped up. >> Please let me know whether it is arrangeable or not. >> Cheers, >> > > Hi Nathaniel, > The sensor sharing question pops up now and then and I'm sure that > if you search the mailing list archive you can find several threads > discussing this. > IIRC the main problem is that in an usb webcam consisting of a > sensor and an usb bridge. The sensor is often configured in a very > specific way tied to the particular usb bridge. It is also common > that much of the initialization is reverse engineered and that we > may have little or no understanding what we're actually doing. > (Often just mimicing a windows webcam driver). > I think the conclusion reached now is that it's not worth the effort > considering that the sensors usually don't need that much setup to > get working. Of course this may need to be reevaluated from time to > time. If someone could device a clever solution I would be all for > trying to create some kind of driver sharing. > > In the gspca-m5602-s5k* case everything is reverse-engineered, as I > don't possess any datasheets of the ALi m5602 nor the s5k83a, > s5k4aa. I would be much happy if you Samsung folks would be able to > provide with me with datasheets for the s5k* sensors. > > Best regards, > Erik > Resending due to UTF-8 fail. >> Nate >> > -- 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
