imx: cortexa7: support camera on TechNexion PICO-PI-IMX7D

Enable device packages required for camera support and add relevant device
tree nodes.

The drivers probe and connect properly, but it currently only supports
uncompressed UYVY in 2592x1944, 1920x1080 and 1280x960 resolutions, so I
had to use ustreamer to get the stream over network:

ustreamer -r 1920x1080 -m UYVY -d /dev/video0 -s 0.0.0.0

To get the camera working, the following extra packages are needed:
kmod-mux-mmio kmod-video-imx7-csi kmod-video-imx-mipi-csis kmod-video-mux \
kmod-video-ov5645

To set up the capture, you need to set up the links and formats across
the pipeline, for example:

media-ctl -d /dev/media0 -l "'ov5645 3-003c':0 -> 'csis-30750000.mipi-csi':0[1]"
media-ctl -d /dev/media0 -l "'csis-30750000.mipi-csi':1 -> 'csi-mux':1[1]"
media-ctl -d /dev/media0 -l "'csi-mux':2 -> 'csi':0[1]"
media-ctl -d /dev/media0 -l "'csi':1 -> 'csi capture':0[1]"

media-ctl -d /dev/media0 -V "'ov5645 3-003c':0 [fmt:UYVY8_1X16/1920x1080 field:none]"
media-ctl -d /dev/media0 -V "'csis-30750000.mipi-csi':0 [fmt:UYVY8_1X16/1920x1080 field:none]"
media-ctl -d /dev/media0 -V "'csis-30750000.mipi-csi':1 [fmt:UYVY8_1X16/1920x1080 field:none]"
media-ctl -d /dev/media0 -V "'csi-mux':1 [fmt:UYVY8_1X16/1920x1080 field:none]"
media-ctl -d /dev/media0 -V "'csi-mux':2 [fmt:UYVY8_1X16/1920x1080 field:none]"
media-ctl -d /dev/media0 -V "'csi':0 [fmt:UYVY8_1X16/1920x1080 field:none]"
media-ctl -d /dev/media0 -V "'csi':1 [fmt:UYVY8_1X16/1920x1080 field:none]"

Signed-off-by: Lech Perczak <lech.perczak@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/17606
Signed-off-by: Robert Marko <robert.marko@sartura.hr>

diff --git a/target/linux/imx/patches-6.12/312-v7.2-ARM-dts-imx7d-pico-pi-add-OV5645-camera-support.patch b/target/linux/imx/patches-6.12/312-v7.2-ARM-dts-imx7d-pico-pi-add-OV5645-camera-support.patch
new file mode 100644 (file)
index 0000000..36d82ba
--- /dev/null
+++ b/target/linux/imx/patches-6.12/312-v7.2-ARM-dts-imx7d-pico-pi-add-OV5645-camera-support.patch
@@ -0,0 +1,111 @@
+From fc2513c6ae9513d10c12e522b69be610f7e49910 Mon Sep 17 00:00:00 2001
+From: Lech Perczak <lech.perczak@gmail.com>
+Date: Wed, 27 May 2026 12:19:12 +0200
+Subject: [PATCH] ARM: dts: imx7d-pico-pi: add OV5645 camera support
+
+Add OV5645 camera device node and enable relevant components in the
+video capture data path, so output stream can be captured, and the
+camera itself can be controlled over I2C bus.
+
+This is roughly based on descriptions found in downstream kernel tree [1],
+adapted to match upstream bindings.
+
+Link: https://github.com/technexion-android/kernel_imx/blob/ce8fd74abf518dac0a09e8dcb37f3496f6375124/arch/arm/boot/dts/imx7d-pico.dtsi#L874 [1]
+
+Signed-off-by: Lech Perczak <lech.perczak@gmail.com>
+Signed-off-by: Frank Li <Frank.Li@nxp.com>
+
+[Backport to 6.12]
+Signed-off-by: Lech Perczak <lech.perczak@gmail.com>
+---
+ arch/arm/boot/dts/nxp/imx/imx7d-pico-pi.dts | 66 +++++++++++++++++++++
+ 1 file changed, 66 insertions(+)
+
+--- a/arch/arm/boot/dts/nxp/imx/imx7d-pico-pi.dts
++++ b/arch/arm/boot/dts/nxp/imx/imx7d-pico-pi.dts
+@@ -31,6 +31,13 @@
+               };
+       };
+ 
++      reg_1p5v: regulator-1p5v {
++              compatible = "regulator-fixed";
++              regulator-name = "1P5V";
++              regulator-min-microvolt = <1500000>;
++              regulator-max-microvolt = <1500000>;
++      };
++
+       sound {
+               compatible = "simple-audio-card";
+               simple-audio-card,name = "imx7-sgtl5000";
+@@ -71,6 +78,33 @@
+               touchscreen-size-x = <800>;
+               touchscreen-size-y = <480>;
+       };
++
++      camera@3c {
++              compatible = "ovti,ov5645";
++              reg = <0x3c>;
++
++              pinctrl-names = "default";
++              pinctrl-0 = <&pinctrl_camera>;
++
++              clocks = <&clks IMX7D_CLKO1_ROOT_DIV>;
++              clock-names = "xclk";
++              clock-frequency = <24000000>;
++
++              enable-gpios = <&gpio1 4 GPIO_ACTIVE_HIGH>;
++              reset-gpios = <&gpio1 5 GPIO_ACTIVE_LOW>;
++
++              vdda-supply = <&reg_2p5v>;
++              vdddo-supply = <&reg_vref_1v8>;
++              vddd-supply = <&reg_1p5v>;
++
++              port {
++                      ov5645_to_mipi_csi2: endpoint {
++                              remote-endpoint = <&mipi_csi2_in>;
++                              clock-lanes = <0>;
++                              data-lanes = <1 2>;
++                      };
++              };
++      };
+ };
+ 
+ &usdhc1 {
+@@ -105,5 +139,37 @@
+                       MX7D_PAD_EPDC_DATA13__GPIO2_IO13        0x14
+               >;
+       };
++};
++
++&iomuxc_lpsr {
++      pinctrl_camera: cameragrp {
++              fsl,pins = <
++                      MX7D_PAD_LPSR_GPIO1_IO04__GPIO1_IO4     0x15
++                      MX7D_PAD_LPSR_GPIO1_IO05__GPIO1_IO5     0x15
++                      MX7D_PAD_LPSR_GPIO1_IO02__CCM_CLKO1     0x7d
++              >;
++      };
++};
++
++&csi {
++      status = "okay";
++};
++
++&mipi_csi {
++      status = "okay";
++
++      ports {
++              port@0 {
++                      reg = <0>;
++
++                      mipi_csi2_in: endpoint {
++                              remote-endpoint = <&ov5645_to_mipi_csi2>;
++                              data-lanes = <1 2>;
++                      };
++              };
++      };
++};
+ 
++&video_mux {
++      status = "okay";
+ };