IMX8QXP mipi-csi

qaq — Thu, 05 May 2022 13:12:48 GMT

hello

I use Linux 5.10.72,and yocto hardknott

When I loaded ov8865.ko imx8-media-dev.ko, generating a /dev/media0 device node instead of /dev/video*, I wasn't sure if it would work on 5.10.

root@imx8qxpc0mek:~# v4l2-ctl --list-devices
mxc-jpeg decoder (platform:58400000.jpegdec):
/dev/video0

mxc-jpeg decoder (platform:58450000.jpegenc):
/dev/video1

FSL Capture Media Device (platform:mxc-md):
/dev/media0

I use gst-launch-1.0 v4l2src device=/dev/media0! The autovideosink test prompted an error.

root@imx8qxpc0mek:~# gst-launch-1.0 v4l2src device=/dev/media0 ! autovideosink
Setting pipeline to PAUSED ...
ERROR: from element /GstPipeline:pipeline0/GstV4l2Src:v4l2src0: Error getting capabilities for device '/dev/media0': It isn't a v4l2 driver. Check if it is a v4l1 driver.
Additional debug info:
../git/sys/v4l2/v4l2_calls.c(91): gst_v4l2_get_capabilities (): /GstPipeline:pipeline0/GstV4l2Src:v4l2src0:
system error: Inappropriate ioctl for device
ERROR: pipeline doesn't want to preroll.
Failed to set pipeline to PAUSED.

LOG

root@imx8qxpc0mek:~# insmod imx8-media-dev.ko
[ 750.857712] imx8_media_dev: module is from the staging directory, the quality is unknown, you have been warned.
[ 750.934246] mx8-img-md: Registered sensor subdevice: ov8865 17-0036 (1)
[ 751.024418] mx8-img-md: created link [ov8865 17-0036] => [mxc-mipi-csi2.0]
[ 751.031342] mxc-md bus@58000000:camera: mxc_md_create_links

DTS

...

&mipi_csi_0 {

#address-cells = <1>;

#size-cells = <0>;

virtual-channel;

status = "okay";

port@0 {

reg = <0>;

mipi_csi0_ep: endpoint {

remote-endpoint = <&ov8865_out_mipi_csi0>;

data-lanes = <1 2 3 4>;

};

...

&i2c_mipi_csi0 {

#address-cells = <1>;

#size-cells = <0>;

pinctrl-names = "default";

pinctrl-0 = <&pinctrl_i2c_mipi_csi0>;

clock-frequency = <100000>;

status = "okay";

ov8865: camera@36 {

compatible = "ovti,ov8865";

reg = <0x36>;

pinctrl-names = "default";

pinctrl-0 = <&pinctrl_mipi_csi0>;

clocks = <&pi0_misc_lpcg 0>;

assigned-clocks = <&pi0_misc_lpcg 0>;

assigned-clock-rates = <24000000>;

clock-frequency = <24000000>;

avdd-supply = <&reg_ov8865_avdd>;

dovdd-supply = <&reg_ov8865_dovdd>;

dvdd-supply = <&reg_ov8865_dvdd>;

powerdown-gpios = <&lsio_gpio3 8 GPIO_ACTIVE_LOW>;

reset-gpios = <&lsio_gpio3 7 GPIO_ACTIVE_LOW>;

port {

ov8865_out_mipi_csi0: endpoint {

data-lanes = <1 2 3 4>;

link-frequencies = /bits/ 64 <360000000>;

remote-endpoint = <&mipi_csi0_ep>;

};

Can you please indicate if I have a mistake where I am doing it, or if there is a relevant manual in version 5.10, please refer to the following?

topic IMX8QXP mipi-csi in i.MX Processors

IMX8QXP mipi-csi