Answering my own question, and also a question in the t613 source code... Yes, the need for the "reg_w(gspca_dev, 0x2087);", 0x2088 and 0x2089 commands are definitely tied to the white balance. These three set up the default values I found out. And (X << 8 + 87) sets up the red channel parameter in general, and 88 is for green and 89 for blue. That means I can already just play with them and see what happens. My personal problem is that I bought this new lens, and the image is way too bright, and changing that seems to help. But I would like to offer these as parameters the user can set using v4l2 programs. I can try making that big change myself, but help from a more experienced developer would be certainly much appreciated!... ++nicolau On Wed, Jan 27, 2010 at 02:37:09PM -0200, Nicolau Werneck wrote: > Hello again, people. I believe I have found in my log the commands > that are setting up that white balance parameters. I am pasting an > excerpt of the log at the end. (I changed the subject now that is > seems this is actually the way I should follow) > > It looks to me that in that SetupPacket vector the "88" encodes what > channel to set. 87 for red, 88 for blue and 89 for green. The > following value is the level, which is default to 0x20. > > The question now is how do I offer to set up that parameter in the > driver? What function can I use to transmits a vector that way, so I > can make a hacky test? > > In other words: would it be possible or me to just cut and paste some > code in the driver to implement that? Or will I be finally forced to > actually learn what I am doing? :) > > regards, > > ++nicolau -- Nicolau Werneck <nwerneck@xxxxxxxxx> 1AAB 4050 1999 BDFF 4862 http://www.lti.pcs.usp.br/~nwerneck 4A33 D2B5 648B 4789 0327 Linux user #460716 -- 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
