DESK-MX6-L/Pheripherals/MIPI
< DESK-MX6-L
Revision as of 14:22, 16 July 2021 by U0009 (talk | contribs) (U0009 moved page AXEL Lite SOM/DESK-MX6-L/Pheripherals/MIPI to DESK-MX6-L/Pheripherals/MIPI: modifica gestione DESK come prodotto a se stante)
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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 AXELLite SOM:
From imx6qdl-sbcx-revb-common.dtsi:
&mipi_csi {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_mipi_csi_axel_sbc>;
status = "okay";
ipu_id = <0>;
csi_id = <1>;
v_channel = <0>;
lanes = <2>;
};
From imx6qdl-axelcommon.dtsi:
&iomuxc {
...
...
pinctrl_mipi_csi_axel_sbc: mipi_csigrp-2 {
fsl,pins = <
MX6QDL_PAD_SD3_DAT7__GPIO6_IO17 0x0b0b0 /* ov5640 mipi powerdown */
MX6QDL_PAD_SD3_DAT6__GPIO6_IO18 0x000b0 /* ov5640 mipi reset */
MX6QDL_PAD_CSI0_MCLK__CCM_CLKO1 0x000b0 /* ov5640 mclk */
>;
};
...
...
};
Accessing the peripheral[edit | edit source]
Linux messages at boot time[edit | edit source]
MIPI CSI-2 driver initialized:
... ... [ 0.261643] mxc_mipi_csi2 21dc000.mipi_csi: i.MX MIPI CSI2 driver probed [ 0.261659] mxc_mipi_csi2 21dc000.mipi_csi: i.MX MIPI CSI2 dphy version is 0x3130302a [ 0.431259] MIPI CSI2 driver module loaded ... ...
and if a MIPI camera is inserted, it has been recognized and its video driver loaded:
root@desk-mx6:~# dmesg | grep -i camera [ 3.373634] camera ov5640_mipi is found root@desk-mx6:~# ls -la /dev/video1* crw-rw---- 1 root video 81, 3 Jun 22 00:33 /dev/video1 crw-rw---- 1 root video 81, 0 Jun 22 00:33 /dev/video16 crw-rw---- 1 root video 81, 1 Jun 22 00:33 /dev/video17 root@desk-mx6:~#
Usage with gstreamer[edit | edit source]
Video capture and display using OV5640 MIPI camera:
root@desk-mx6:~# gst-launch-1.0 -v imxv4l2src device=/dev/video1 ! imxv4l2sink [ 592.680143] ERROR: v4l2 capture: slave not found! ====== IMXV4L2SRC: 4.4.5 build on Jun 22 2020 02:01:01. ====== ====== IMXV4L2SINK: 4.4.5 build on Jun 22 2020 02:01:01. ====== Setting pipeline to PAUSED ... display(/dev/fb0) resolution is (800x480). Pipeline is live and does not need PREROLL ... Setting pipeline to PLAYING ... New clock: GstSystemClock /GstPipeline:pipeline0/GstImxV4l2Src:imxv4l2src0.GstPad:src: caps = video/x-raw, format=(string)NV12, width=(int)640, height=(int)480, framerate=(fraction)30/1 /GstPipeline:pipeline0/GstImxV4l2Sink:imxv4l2sink0.GstPad:sink: caps = video/x-raw, format=(string)NV12, width=(int)640, height=(int)480, framerate=(fraction)30/1 v4l2sink need allocate 3 buffers. ... ...
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
