topic Camera streaming issue for imx8mp in debian in i.MX Processors

Camera streaming issue for imx8mp in debian

Neha_V — Wed, 12 Nov 2025 09:37:00 GMT

I am validating ov5640 camera in Debian 12 for imx8mp .

&i2c3 { /* MIPI_CSI0: OV5640 Camera */
ov5640_0: ov5640_mipi@3c {
compatible = "ovti,ov5640";
reg = <0x3c>;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_csi0_rst>, <&pinctrl_csi_mclk>;
clocks = <&clk IMX8MP_CLK_IPP_DO_CLKO1>;
clock-names = "xclk";
assigned-clocks = <&clk IMX8MP_CLK_IPP_DO_CLKO1>;
assigned-clock-parents = <&clk IMX8MP_CLK_24M>;
assigned-clock-rates = <24000000>;
csi_id = <0>;
reset-gpios = <&gpio1 10 GPIO_ACTIVE_LOW>;
mclk = <24000000>;
mclk_source = <0>;
mipi_csi;
status = "okay";

port {
ov5640_mipi_0_ep: endpoint {
remote-endpoint = <&mipi_csi0_ep>;
data-lanes = <1 2>;
clock-lanes = <0>;
};
};
};
};

&i2c2 {
sgtl5000_codec: sgtl5000@a { /* SGTL5000: Audio Codec */
compatible = "fsl,sgtl5000";
reg = <0xa>;
#sound-dai-cells = <0>;
clocks = <&audioclk>;
VDDA-supply = <&reg_1p8v>;
VDDIO-supply = <&reg_1p8v>;
VDDD-supply = <&reg_1p5v>;
status = "okay";
};

ov5640_1: ov5640_mipi@3c {
compatible = "ovti,ov5640";
reg = <0x3c>;
clocks = <&clk IMX8MP_CLK_IPP_DO_CLKO1>;
clock-names = "xclk";
assigned-clocks = <&clk IMX8MP_CLK_IPP_DO_CLKO1>;
assigned-clock-parents = <&clk IMX8MP_CLK_24M>;
assigned-clock-rates = <24000000>;
csi_id = <0>;
mclk = <24000000>;
mclk_source = <0>;
mipi_csi;
status = "okay";

port {
ov5640_mipi_1_ep: endpoint {
remote-endpoint = <&mipi_csi1_ep>;
data-lanes = <1 2>;
clock-lanes = <0>;
};
};
};
};

i have added the dts nodes
in my debug terminal below prints are observed
root@unknown:~# dmesg | grep "csi"
[ 0.064823] platform 32e40000.csi: Fixed dependency cycle(s) with /soc@0/bus@30800000/i2c@30a40000/ov5640_mipi@3c
[ 0.065165] platform 32e50000.csi: Fixed dependency cycle(s) with /soc@0/bus@30800000/i2c@30a30000/ov5640_mipi@3c
[ 1.996245] mxc-mipi-csi2-sam 32e40000.csi: supply mipi-phy not found, using dummy regulator
[ 2.005128] : mipi_csis_imx8mp_phy_reset, No remote pad found!
[ 2.017646] mxc-mipi-csi2-sam 32e40000.csi: lanes: 2, hs_settle: 13, clk_settle: 2, wclk: 1, freq: 500000000
[ 2.027763] mxc-mipi-csi2-sam 32e50000.csi: supply mipi-phy not found, using dummy regulator
[ 2.036544] : mipi_csis_imx8mp_phy_reset, No remote pad found!
[ 2.042435] mxc-mipi-csi2-sam 32e50000.csi: lanes: 2, hs_settle: 13, clk_settle: 2, wclk: 1, freq: 266000000
root@unknown:~# dmesg | grep "ov56"
[ 0.064823] platform 32e40000.csi: Fixed dependency cycle(s) with /soc@0/bus@30800000/i2c@30a40000/ov5640_mipi@3c
[ 0.065165] platform 32e50000.csi: Fixed dependency cycle(s) with /soc@0/bus@30800000/i2c@30a30000/ov5640_mipi@3c
[ 2.474968] ov5640 1-003c: supply DOVDD not found, using dummy regulator
[ 2.481826] ov5640 1-003c: supply AVDD not found, using dummy regulator
[ 2.488491] ov5640 1-003c: supply DVDD not found, using dummy regulator
[ 2.495702] ov5640 1-003c: ov5640_write_reg: error: reg=3008, val=82
[ 2.528236] ov5640 1-003c: ov5640_read_reg: error: reg=300a
[ 2.533833] ov5640 1-003c: ov5640_check_chip_id: failed to read chip identifier
[ 2.548572] ov5640 2-003c: supply DOVDD not found, using dummy regulator
[ 2.555433] ov5640 2-003c: supply AVDD not found, using dummy regulator
[ 2.562095] ov5640 2-003c: supply DVDD not found, using dummy regulator
[ 2.569525] ov5640 2-003c: ov5640_write_reg: error: reg=3008, val=82
[ 2.602054] ov5640 2-003c: ov5640_read_reg: error: reg=300a
[ 2.607645] ov5640 2-003c: ov5640_check_chip_id: failed to read chip identifier
root@unknown:~#

even in the i2c the camera slave is not detecting

Re: Camera streaming issue for imx8mp in debian

AldoG — Thu, 13 Nov 2025 23:49:50 GMT

Hello,

Are you using EVK/FRDM board?
We already have support for the OV5640 by default on our Debian release, so no modification should be needed if using EVK/FRDM.

Best regards/Saludos,
Aldo.

Re: Camera streaming issue for imx8mp in debian

mary58 — Fri, 14 Nov 2025 08:48:07 GMT

The failure to detect the OV5640 camera in Debian on i.MX8MP, indicated by the critical errors supply DOVDD not found and failed to read chip identifier, stems from an incomplete Device Tree Source (DTS) configuration. The sensor is not responding on the I2C bus because it is likely not powered up. To fix this, you must explicitly define and link the OV5640's required voltage rails (DOVDD-supply, AVDD-supply, DVDD-supply) to the appropriate regulator nodes (e.g., &reg_1p8v, &reg_2p8v) within both camera nodes in the DTS file, ensuring the sensor receives power before the driver attempts I2C communication.

Re: Camera streaming issue for imx8mp in debian

Neha_V — Mon, 17 Nov 2025 03:34:27 GMT

Hello

We are using the imx8mp evk based custom board . The same source with the linux it is working but only with the debian it is not working.

Regards ,

Neha

Re: Camera streaming issue for imx8mp in debian

Neha_V — Thu, 18 Dec 2025 10:30:39 GMT

i am using imx8mp processor based custom board. The above error prints are solved.

i am testing ov5640 camera on imx8mp .I tried the cheese application for this camera but i am getting the below prints
[ 172.691637] mxc-mipi-csi2.0: unsupported csi-sam command -1068476902

i tried through command line
but it is not streaming the below error is observed
debian@unknown:~$ gst-launch-1.0 v4l2src device=/dev/video4 ! videoconvert ! ximagesink
Setting pipeline to PAUSED ...
Authorization required, but no authorization protocol specified

ERROR: from element /GstPipeline:pipeline0/GstXImageSink:ximagesink0: Could not initialise X output
Additional debug info:
../sys/ximage/ximagesink.c(1150): gst_x_image_sink_xcontext_get (): /GstPipeline:pipeline0/GstXImageSink:ximagesink0:
Could not open display
ERROR: pipeline doesn't want to preroll.
Failed to set pipeline to PAUSED.
Setting pipeline to NULL ...
Freeing pipeline ...

but if i start Weston the camera streaming is working but i don't want this method
i want to test the camera through cheese application and and through commmand line normally

Re: Camera streaming issue for imx8mp in debian

Neha_V — Thu, 18 Dec 2025 10:31:20 GMT

i am working on debian 12 based on Linux 6.6.52 kernel