Heippa! On Wed, May 07, 2014 at 03:57:11PM +0300, Antti Palosaari wrote: > What is preferred way implement controls that could have some known > unit or unknown unit? For example for gain controls, I would like to > offer gain in unit of dB (decibel) and also some unknown driver > specific unit. Should I two controls, one for each unit? > > Like that > > V4L2_CID_RF_TUNER_LNA_GAIN_AUTO > V4L2_CID_RF_TUNER_LNA_GAIN > V4L2_CID_RF_TUNER_LNA_GAIN_dB I suppose that on any single device there would be a single unit to control a given... control. Some existing controls do document the unit as well but I don't think that's scalable nor preferrable. This way we'd have many different controls to control the same thing but just using a different unit. The auto control is naturally different. Hans did have a patch to add the unit to queryctrl (in the form of QUERY_EXT_CTRL). <URL:http://www.spinics.net/lists/linux-media/msg73136.html> I wish we can get these in relatively soon. -- Terveisin, Sakari Ailus e-mail: sakari.ailus@xxxxxx XMPP: sailus@xxxxxxxxxxxxxx -- 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
