DESK-MX8M-L/Peripherals/MIPI
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| Version | Issue Date | Notes | |
| 1.0.0 | Jan 2022 | First DESK-MX8M release | |
Contents
Peripheral MIPI[edit | edit source]
Device tree configuration[edit | edit source]
Here below an example of device tree configuration used on standard DAVE's kit for the ORCA SOM:
From imx8mp-mito8mplus-cb1001.dts:
&mipi_csi_0 {
#address-cells = <1>;
#size-cells = <0>;
status = "okay";
port@0 {
reg = <0>;
mipi_csi0_ep: endpoint {
remote-endpoint = <&ov5640_mipi_0_ep>;
data-lanes = <2>;
csis-hs-settle = <13>;
csis-clk-settle = <2>;
csis-wclk;
};
};
};
&mipi_csi_1 {
#address-cells = <1>;
#size-cells = <0>;
status = "okay";
port@1 {
reg = <1>;
mipi_csi1_ep: endpoint {
remote-endpoint = <&ov5640_mipi_1_ep>;
data-lanes = <2>;
csis-hs-settle = <13>;
csis-clk-settle = <2>;
csis-wclk;
};
};
};
From imx8mp-mito8mplus.dtsi:
&iomuxc {
...
...
pinctrl_mipi_dsi_en: mipi_dsi_en {
fsl,pins = <
MX8MP_IOMUXC_GPIO1_IO08__GPIO1_IO08 0x16
>;
};
...
...
};
Accessing the peripheral[edit | edit source]
Linux messages at boot time[edit | edit source]
MIPI CSI-2 driver initialized:
... ... [ 1.486047] mxc-mipi-csi2-sam 32e40000.csi: 32e40000.csi supply mipi-phy not found, using dummy regulator [ 1.496009] mxc-mipi-csi2-sam 32e40000.csi: lanes: 2, hs_settle: 13, clk_settle: 2, wclk: 1, freq: 500000000 [ 1.506087] mxc-mipi-csi2-sam 32e50000.csi: 32e50000.csi supply mipi-phy not found, using dummy regulator [ 1.515958] mxc-mipi-csi2-sam 32e50000.csi: lanes: 2, hs_settle: 13, clk_settle: 2, wclk: 1, freq: 266000000 ... ...
and if a MIPI camera is inserted, it has been recognized and its video driver loaded:
root@desk-mx8mp:~# dmesg | grep -i ov5640 [ 2.038286] ov5640 1-003c: 1-003c supply DOVDD not found, using dummy regulator [ 2.045672] ov5640 1-003c: 1-003c supply AVDD not found, using dummy regulator [ 2.052936] ov5640 1-003c: 1-003c supply DVDD not found, using dummy regulator [ 2.067852] ov5640 2-003c: 2-003c supply DOVDD not found, using dummy regulator [ 2.075222] ov5640 2-003c: 2-003c supply AVDD not found, using dummy regulator [ 2.082488] ov5640 2-003c: 2-003c supply DVDD not found, using dummy regulator [ 2.090371] ov5640 2-003c: ov5640_read_reg: error: reg=300a [ 2.095959] ov5640 2-003c: ov5640_check_chip_id: failed to read chip identifier [ 5.719681] mx8-img-md: Registered sensor subdevice: ov5640 1-003c (1) [ 5.752677] mx8-img-md: created link [ov5640 1-003c] => [mxc-mipi-csi2.0] root@desk-mx8mp:~# ls -la /dev/video1 crw-rw---- 1 root video 81, 1 Jan 13 17:25 /dev/video1 root@desk-mx8mp:~#
Usage with gstreamer[edit | edit source]
Video capture and display using Pcam 5C OV5640 MIPI camera:
root@desk-mx8mp:~# gst-launch-1.0 v4l2src device=/dev/video1 ! "video/x-raw,width=1280,height=720" ! queue ! videorate ! vpuenc_h264 ! avimux ! filesink location=camera_test.avi
Setting pipeline to PAUSED ...
====== VPUENC: 4.5.7 build on Dec 2 2021 19:53:04. ======
wrapper: 3.0.0 (VPUWRAPPER_ARM64_LINUX Build on Dec 2 2021 19:43:12)
vpulib: 1.1.1
firmware: 1.1.1.43690
Pipeline is live and does not need PREROLL ...
Setting pipeline to PLAYING ...
New clock: GstSystemClock
[ 56.090918] bypass csc
[ 56.093288] input fmt YUV4
[ 56.096074] output fmt YUYV
^Chandling interrupt.
Interrupt: Stopping pipeline ...
Execution ended after 0:00:06.547119013
Setting pipeline to PAUSED ...
Setting pipeline to READY ...
Setting pipeline to NULL ...
Freeing pipeline ...
root@desk-mx8mp:~#
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
