On Thu, Dec 31, 2020 at 03:29:40PM +0100, Paul Kocialkowski wrote: > The A31 CSI controller supports a MIPI CSI-2 bridge input, which has > its own dedicated port in the fwnode graph. > > Support for this input is added with this change: > - two pads are defined for the media entity instead of one > and only one needs to be connected at a time; > - the pads currently match the fwnode graph representation; > - links are created between our pads and the subdevs for each > interface and are no longer immutable so that userspace can select > which interface to use in case both are bound to a subdev; > - fwnode endpoints are parsed and stored for each interface; > - the active subdev (and fwnode endpoint) is retrieved when validating > the media link at stream on time and cleared at stream off; > - an error is raised if both links are active at the same time; > - the MIPI interface bit is set if the MIPI CSI-2 bridge endpoint is > active. > > In the future, the media entity representation might evolve to: > - distinguish the internal parallel bridge and data formatter; > - represent each of the 4 internal channels that can exist between > the parallel bridge (for BT656 time-multiplex) and MIPI CSI-2 > (internal channels can be mapped to virtual channels); > - connect the controller's output to the ISP instead of its > DMA engine. > > Finally note that the MIPI CSI-2 bridges should not be linked in > the fwnode graph unless they have a sensor subdev attached. > > Signed-off-by: Paul Kocialkowski <paul.kocialkowski@xxxxxxxxxxx> Acked-by: Maxime Ripard <mripard@xxxxxxxxxx> Maxime
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