Hi, On 03/10/2011 10:56 AM, Jeongtae Park wrote: > Hi, all. > > Some hardware need to handle per-filehandle level controls. > Hans suggests add a v4l2_ctrl_handler struct v4l2_fh. It will be work fine. > Although below patch series are for subdev, but it's great start point. > I will try to make a patch. > > If v4l2 control framework can be handle per-filehandle controls, > a driver could be handle per-buffer level controls also. (with VB2 callback > operation) >
Can you elaborate to what kind of per buffer controls are you referring to? Using optional meta data planes is expected to be a proper way to do such things. Either to pass meta data from application to driver or in the opposite direction. I can't see how the per buffer controls can be dependent on a per file handle control support. Perhaps this is only specific to some selected devices. -- Regards, Sylwester Nawrocki -- 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
