Hey,
I am currently working on multiplexing two MIPI sensors on the CSI1 port of a CM4. On the hardware side I am using a Diodes PI3WVR626 for the CSI signals and a TI TS3A24159 for the I2C signals.
Since I am using custom sensors I did come up with the following device tree overlay, based on the camera-mux-2port-overlay.dts. For better readability I omitted a few minor details.
This basically works well. Everything is initialized correctly and detected trough the Media Controller API:
However, somehow the links got messed up. The unicams sinks are linked to the video-mux sinks and since they are immutable I am not able to change them.
Can somebody help me to fix the links or tell me how to change them/set them correctly? I am bit lost.
Thank you!
I am currently working on multiplexing two MIPI sensors on the CSI1 port of a CM4. On the hardware side I am using a Diodes PI3WVR626 for the CSI signals and a TI TS3A24159 for the I2C signals.
Since I am using custom sensors I did come up with the following device tree overlay, based on the camera-mux-2port-overlay.dts. For better readability I omitted a few minor details.
Code:
/{compatible = "brcm,bcm2835";fragment@0 {target = <&soc>;__overlay__ { i2cmux { compatible = "i2c-mux-gpio"; #address-cells = <1>; #size-cells = <0>; mux-gpios = <&gpio_0x21 1 0>; i2c-parent = <&i2c1>; i2c@0 { reg = <0>; #address-cells = <1>; #size-cells = <0>; [...] ar0830_CSI1: ar0830_CSI1@36 { compatible = "onsemi,ar0830"; reg = <0x36>; status = "okay"; [...] port { ar0830_CSI1_0_ep: endpoint { remote-endpoint = <&mux_in0>; clock-lanes = <0>; data-lanes = <1 2>; clock-noncontinuous; link-frequencies = /bits/ 64 <594000000>; }; }; }; }; i2c@1 { reg = <1>; #address-cells = <1>; #size-cells = <0>; [...] imx568_CSI1: imx568_CSI1@1a { compatible = "sony,imx568"; reg = <0x1a>; status = "okay"; [...] port { imx568_CSI1_1_ep: endpoint { remote-endpoint = <&mux_in1>; clock-lanes = <0>; data-lanes = <1 2>; clock-noncontinuous; link-frequencies = /bits/ 64 <594000000>; }; }; }; }; };}; }; fragment@1 {target = <&csi1>;__overlay__ {status = "okay";port {csi1_ep: endpoint {remote-endpoint = <&mux_out>;clock-lanes = <0>;data-lanes = <1 2>;clock-noncontinuous;};};};};fragment@2 {target = <&i2c1>;__overlay__ {pinctrl-0 = <&i2c1_gpio44>;};}; fragment@3 {target-path="/";__overlay__ {mux: mux-controller {compatible = "gpio-mux";#mux-control-cells = <0>;mux-gpios = <&gpio_0x21 2 0>;};video-mux {compatible = "video-mux";mux-controls = <&mux>;#address-cells = <1>;#size-cells = <0>;port@0 {reg = <0>;mux_in0: endpoint { remote-endpoint = <&ar0830_CSI1_0_ep>; clock-lanes = <0>; data-lanes = <1 2>; clock-noncontinuous;};};port@1 {reg = <1>;mux_in1: endpoint { remote-endpoint = <&imx568_CSI1_1_ep>; clock-lanes = <0>; data-lanes = <1 2>; clock-noncontinuous;};};port@2 {reg = <2>;mux_out: endpoint {remote-endpoint = <&csi1_ep>;clock-lanes = <0>; data-lanes = <1 2>; clock-noncontinuous;};};};};}; fragment@4 {target = <&gpio>;__overlay__ {mipi_sw_oe_hog {gpio-hog;gpios = <&gpio_0x21 3 0>;output-high;};};}; [...] };Code:
root@unknown:~# media-ctl -pMedia controller API version 5.4.83Media device information------------------------driver unicammodel unicamserialbus info platform:fe801000.csihw revision 0x0driver version 5.4.83Device topology- entity 1: video-mux (3 pads, 2 links) type V4L2 subdev subtype Unknown flags 0 device node name /dev/v4l-subdev0 pad0: Sink [fmt:Y8_1X8/1x1 field:none] -> "unicam-image":0 [ENABLED,IMMUTABLE] pad1: Sink [fmt:Y8_1X8/1x1 field:none] -> "unicam-embedded":0 [ENABLED,IMMUTABLE] pad2: Source [fmt:Y8_1X8/1x1 field:none]- entity 5: AR0830 (2 pads, 0 link) type V4L2 subdev subtype Sensor flags 0 device node name /dev/v4l-subdev1 pad0: Source [fmt:SGBRG8_1X8/3840x2160 field:none colorspace:raw xfer:none ycbcr:601 quantization:full-range] pad1: Source [fmt:unknown/16384x2 field:none]- entity 8: IMX568 (2 pads, 0 link) type V4L2 subdev subtype Sensor flags 0 device node name /dev/v4l-subdev2 pad0: Source [fmt:Y8_1X8/2472x2064 field:none colorspace:raw xfer:none ycbcr:601 quantization:full-range crop.bounds:(0,0)/2472x2064 crop:(0,0)/2472x2064] pad1: Source [fmt:unknown/16384x1 field:none crop.bounds:(0,0)/2472x2064 crop:(0,0)/2472x2064]- entity 11: unicam-image (1 pad, 1 link) type Node subtype V4L flags 1 device node name /dev/video0 pad0: Sink <- "video-mux":0 [ENABLED,IMMUTABLE]- entity 17: unicam-embedded (1 pad, 1 link) type Node subtype V4L flags 0 device node name /dev/video1 pad0: Sink <- "video-mux":1 [ENABLED,IMMUTABLE]Can somebody help me to fix the links or tell me how to change them/set them correctly? I am bit lost.
Thank you!
Statistics: Posted by marcp — Wed Jan 15, 2025 1:51 pm — Replies 0 — Views 21