On Tue, Oct 10, 2017 at 05:30:04AM -0300, Mauro Carvalho Chehab wrote: > Em Fri, 6 Oct 2017 13:22:29 +0300 > Sakari Ailus <sakari.ailus@xxxxxx> escreveu: > > > > + Bridge driver > > > + The same as V4L2 main driver. > > > > Not all V4L2 main drivers can be bridge drivers. Mem-to-mem devices, for > > instance. How about: > > > > A driver for a device receiving image data from another device (or > > transmitting it to a sub-device) controlled by a sub-device driver. Bridge > > drivers typically act as V4L2 main drivers. > > That is not true for some device drivers we have. > > The GSPCA drivers are bridge drivers, but they don't use any sub-device > (well, it should, but nobody will redesign it, as the efforts would > be huge, for a very little gain). Also uvcdriver doesn't need sub-device > drivers, as the camera's internal firmware does the interface with the > sensors. > > We could, instead define it as: > > Bridge driver > A driver that provides a bridge between the CPU's bus to the > data and control buses of a media hardware. Often, the > bridge driver is the same as V4L2 main driver. Looks good to me. -- Sakari Ailus e-mail: sakari.ailus@xxxxxx
