Hi On Wed, 8 Dec 2010, Kim, HeungJun wrote: > Hi Guennadi, > > I wonder the difference with pixelcode mediabus and v4l2_colorspace. > In mt9m001.c subdev driver, the "format" seems be determined using the > combination pixelcode & colorspace. In the previous kernel > version(before using Media Controller), > somtimes the pixelformat is used for defining format of isp device. But, > I gonna change to use Media Controller. The change to mediabus pixelcodes has happened a while ago, whereas media controller is still not in the mainline. Mediabus is physically a bus between various parts of the media (video) subsystem, e.g., between a sensor and an SoC, or between resizers, format converters, etc., as long as data between them is exchanged directly over a set of data and sync lines, and not via mamory buffers. Original V4L2 fourcc codes on the other side describe data format in _memory_. The use of a pixelcode and a colorspace has been selected for the new mediabus API, so, that's what we have to use now in drivers, using this API. > So, can you tell me where I find about Media Controller, especially > pixelcode and colorspace? Again - these are not directly related things. The MC API has adopted, extended and is using the mediabus API, Laurent has documented many things wonderfully, have a look at http://www.ideasonboard.org/media/media/subdev.html#v4l2-mbus-format Thanks Guennadi --- Guennadi Liakhovetski, Ph.D. Freelance Open-Source Software Developer http://www.open-technology.de/ -- 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
