ARM: dts: imx6qdl: Add video multiplexers, mipi_csi, and their connections

This patch adds the device tree graph connecting the input multiplexers
to the IPU CSIs and the MIPI-CSI2 gasket on i.MX6. The MIPI_IPU
multiplexers are added as children of the iomuxc-gpr syscon device node.
On i.MX6Q/D two two-input multiplexers in front of IPU1 CSI0 and IPU2
CSI1 allow to select between CSI0/1 parallel input pads and the MIPI
CSI-2 virtual channels 0/3.
On i.MX6DL/S two five-input multiplexers in front of IPU1 CSI0 and IPU1
CSI1 allow to select between CSI0/1 parallel input pads and any of the
four MIPI CSI-2 virtual channels.

Changes from Steve Longerbeam:
- Removed some dangling/unused endpoints (ipu2_csi0_from_csi2ipu)
- Renamed the mipi virtual channel endpoint labels, from "mipi_csiX_..."
  to "mipi_vcX...".
- Added input endpoint anchors to the video muxes for the connections
  from parallel sensors.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Steve Longerbeam <steve_longerbeam@mentor.com>
Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

1 files changed, 6 insertions, 0 deletions

diff --git a/arch/arm/boot/dts/imx6qdl.dtsi b/arch/arm/boot/dts/imx6qdl.dtsi
index a42a3fd3ee94..a9723b94bafa 100644
--- a/arch/arm/boot/dts/imx6qdl.dtsi
+++ b/arch/arm/boot/dts/imx6qdl.dtsi
@@ -1160,6 +1160,8 @@
 			mipi_csi: mipi@021dc000 {
 				compatible = "fsl,imx6-mipi-csi2";
 				reg = <0x021dc000 0x4000>;
+				#address-cells = <1>;
+				#size-cells = <0>;
 				interrupts = <0 100 0x04>, <0 101 0x04>;
 				clocks = <&clks IMX6QDL_CLK_HSI_TX>,
 					 <&clks IMX6QDL_CLK_VIDEO_27M>,
@@ -1267,6 +1269,10 @@
 
 			ipu1_csi0: port@0 {
 				reg = <0>;
+
+				ipu1_csi0_from_ipu1_csi0_mux: endpoint {
+					remote-endpoint = <&ipu1_csi0_mux_to_ipu1_csi0>;
+				};
 			};
 
 			ipu1_csi1: port@1 {