DESK-MX9-L/Peripherals/MIPI
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| 2024/01/30 | DESK-MX9-L-5.0.0 release | ||
Contents
Peripheral MIPI[edit | edit source]
Device tree configuration[edit | edit source]
Here below is an example of device tree configuration used on standard DAVE's kit for the AURA SOM:
From imx93-aura-cb2001.dts:
...
/ {
...
regulators {
...
ov5640_reg_2v8: ov5640_reg_2v8 {
compatible = "regulator-fixed";
regulator-name = "ov5640_reg_2v8";
regulator-min-microvolt = <2800000>;
regulator-max-microvolt = <2800000>;
regulator-always-on;
};
ov5640_reg_1v8: ov5640_reg_1v8 {
compatible = "regulator-fixed";
regulator-name = "ov5640_reg_1v8";
regulator-min-microvolt = <1800000>;
regulator-max-microvolt = <1800000>;
regulator-always-on;
};
ov5640_reg_1v5: ov5640_reg_1v5 {
compatible = "regulator-fixed";
regulator-name = "ov5640_reg_1v5";
regulator-min-microvolt = <1500000>;
regulator-max-microvolt = <1500000>;
regulator-always-on;
};
...
};
...
};
...
&lpi2c3 {
...
ov5640_mipi: ov5640_mipi@3c {
compatible = "ovti,ov5640";
reg = <0x3c>;
clocks = <&clk IMX93_CLK_CCM_CKO3>;
assigned-clocks = <&clk IMX93_CLK_CCM_CKO3>;
assigned-clock-rates = <24000000>;
clock-names = "xclk";
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_mipi_cam>;
reset-gpios = <&gpio1 11 GPIO_ACTIVE_HIGH>;
csi_id = <0>;
mclk = <24000000>;
mclk_source = <0>;
mipi_csi;
DOVDD-supply = <&ov5640_reg_1v8>;
AVDD-supply = <&ov5640_reg_2v8>;
DVDD-supply = <&ov5640_reg_1v5>;
status = "okay";
port {
ov5640_mipi1_ep: endpoint {
remote-endpoint = <&mipi_csi_ep>;
data-lanes = <2>;
cfg-clk-range = <28>;
hs-clk-range = <0x16>;
};
};
};
...
};
...
&mipi_csi {
#address-cells = <1>;
#size-cells = <0>;
status = "okay";
port@0 {
reg = <0>;
mipi_csi_ep: endpoint {
remote-endpoint = <&ov5640_mipi1_ep>;
data-lanes = <2>;
cfg-clk-range = <28>;
hs-clk-range = <0x16>;
bus-type = <4>;
};
};
};
...
&iomuxc {
...
pinctrl_mipi_cam: mipi_cam {
fsl,pins = <
MX93_PAD_SAI1_TXFS__GPIO1_IO11 0x31e
>;
};
...
};
Accessing the peripheral[edit | edit source]
Linux messages at boot time[edit | edit source]
MIPI CSI driver initialized and if a MIPI camera is inserted, it has been recognized and its video driver is loaded:
... [ 1.877299] i2c 2-003c: Fixed dependency cycle(s) with /soc@0/bus@42800000/camera/csi@4ae00000/port@0/endpoint [ 1.888225] ov5640 2-003c: ov5640_write_reg: error: reg=3008, val=82 [ 2.064939] mxc-md 42800000.bus:camera: deferring csi device registration [ 2.072752] dwc-mipi-csi2-host 4ae00000.csi: lanes: 2, name: mxc-mipi-csi2.0 [ 2.109933] mx8-img-md: Registered sensor subdevice: ov5640 2-003c (1) [ 2.123066] mx8-img-md: created link [mxc-mipi-csi2.0] => [mxc_isi.0] [ 2.129497] mx8-img-md: created link [ov5640 2-003c] => [mxc-mipi-csi2.0] ...
Then, check if the camera is correctly recognized.
root@desk-mx93:~# ls -la /dev/video0 crw-rw---- 1 root video 81, 0 Mar 3 11:31 /dev/video0 root@desk-mx93:~#
Usage with gstreamer[edit | edit source]
Video capture and display using Pcam 5C OV5640 MIPI camera:
 At every power-on cycle the first camera usage is not working. Run |
root@desk-mx93:~# gst-launch-1.0 v4l2src device=/dev/video0 ! video/x-raw,width=640,height=480 ! waylandsink Setting pipeline to PAUSED ... Pipeline is live and does not need PREROLL ... Pipeline is PREROLLED ... Setting pipeline to PLAYING ... New clock: GstSystemClock [ 1864.940941] mxc-mipi-csi2.0: format: 0x2008 [ 1864.950148] bypass csc [ 1864.952512] input fmt YUV4 [ 1864.955219] output fmt YUYV [ 1865.066804] dwc-mipi-csi2-host 4ae00000.csi: enter enable=1 Redistribute latency... handling interrupt.:99. Interrupt: Stopping pipeline ... Execution ended after 0:00:06.73270[ 1871.190805] dwc-mipi-csi2-host 4ae00000.csi: enter enable=0 5712 Setting pipeline to NULL ... Total showed frames (137), playing for (0:00:06.732670920), fps (20.349). Freeing pipeline ... root@desk-mx93:~#
Additional information[edit | edit source]
More information about gstreamer on its web site.
More information about i.MX gstreamer plugin on the gstreamer-imx web site
