On Fri, Jan 06, 2017 at 06:11:31PM -0800, Steve Longerbeam wrote: > From: Philipp Zabel <p.zabel@xxxxxxxxxxxxxx> > > This driver can handle SoC internal and external video bus multiplexers, > controlled either by register bit fields or by a GPIO. The subdevice > passes through frame interval and mbus configuration of the active input > to the output side. > > Signed-off-by: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx> > Signed-off-by: Philipp Zabel <p.zabel@xxxxxxxxxxxxxx> > > -- > > - fixed a cut&paste error in vidsw_remove(): v4l2_async_register_subdev() > should be unregister. > > - added media_entity_cleanup() and v4l2_device_unregister_subdev() > to vidsw_remove(). > > - there was a line left over from a previous iteration that negated > the new way of determining the pad count just before it which > has been removed (num_pads = of_get_child_count(np)). > > - Philipp Zabel has developed a set of patches that allow adding > to the subdev async notifier waiting list using a chaining method > from the async registered callbacks (v4l2_of_subdev_registered() > and the prep patches for that). For now, I've removed the use of > v4l2_of_subdev_registered() for the vidmux driver's registered > callback. This doesn't affect the functionality of this driver, > but allows for it to be merged now, before adding the chaining > support. > > Signed-off-by: Steve Longerbeam <steve_longerbeam@xxxxxxxxxx> > --- > .../bindings/media/video-multiplexer.txt | 59 +++ > drivers/media/platform/Kconfig | 8 + > drivers/media/platform/Makefile | 2 + > drivers/media/platform/video-multiplexer.c | 472 +++++++++++++++++++++ > 4 files changed, 541 insertions(+) > create mode 100644 Documentation/devicetree/bindings/media/video-multiplexer.txt > create mode 100644 drivers/media/platform/video-multiplexer.c > > diff --git a/Documentation/devicetree/bindings/media/video-multiplexer.txt b/Documentation/devicetree/bindings/media/video-multiplexer.txt > new file mode 100644 > index 0000000..9d133d9 > --- /dev/null > +++ b/Documentation/devicetree/bindings/media/video-multiplexer.txt > @@ -0,0 +1,59 @@ > +Video Multiplexer > +================= > + > +Video multiplexers allow to select between multiple input ports. Video received > +on the active input port is passed through to the output port. Muxes described > +by this binding may be controlled by a syscon register bitfield or by a GPIO. > + > +Required properties: > +- compatible : should be "video-multiplexer" This should have an SoC/chip specific compatible string additionally. Just need a note to that effect here, but i.MX will need a compat string. > +- reg: should be register base of the register containing the control bitfield > +- bit-mask: bitmask of the control bitfield in the control register > +- bit-shift: bit offset of the control bitfield in the control register > +- gpios: alternatively to reg, bit-mask, and bit-shift, a single GPIO phandle > + may be given to switch between two inputs > +- #address-cells: should be <1> > +- #size-cells: should be <0> > +- port@*: at least three port nodes containing endpoints connecting to the > + source and sink devices according to of_graph bindings. The last port is > + the output port, all others are inputs. _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
