i.MX 8QuadMax MEK​ usage with MINISASTOCSI ov5640 camera

[Jen2]

my imx8qm mek board and MINISASTOCSI module purchased on the NXP official website

use Linux 4.14.98_ 2.0.0 BSP and fsl-imx8qm-mek-ov5640. dtb

but there is an error message：

    mxc-mipi-csi2 58227000.csi: mipi_csi2_probe
    ov5640_mipi_v3 8-003c: 8-003c supply DOVDD not found, using dummy regulator
    ov5640_mipi_v3 8-003c: 8-003c supply DVDD not found, using dummy regulator

    ov5640_mipi_v3 8-003c: 8-003c supply AVDD not found, using dummy regulator

    ov5640_mipi_v3 8-003c: Read reg error: reg=300a

    camera ov5640 is not found

use the oscilloscope to measure the SDA and SCL pins, which are always at high level

What may be the reason?

[joanxie]

imx8qm has two mipi csi port，did you try the another one? get the same error message on two mipi csi ports?

[Jen2]

Yes, I only have one module. Insert mipi csi0 or mipi csi1 with the same error message. Is there a possibility that the imx8qm mek board has a dial switch or something else that needs to be set?

[15-20-20.385][ 4.120204] mxc-mipi-csi2 58227000.csi: mipi_csi2_probe
[15-20-20.385][ 4.144654] mxc-mipi-csi2 58247000.csi: mipi_csi2_probe
[15-20-20.385][ 4.169401] ov5640_mipi_v3 8-003c: 8-003c supply DOVDD not found, using dummy regulator
[15-20-20.393][ 4.177479] ov5640_mipi_v3 8-003c: 8-003c supply DVDD not found, using dummy regulator
[15-20-20.423][ 4.185428] ov5640_mipi_v3 8-003c: 8-003c supply AVDD not found, using dummy regulator
[15-20-20.445][ 4.223873] ov5640_mipi_v3 8-003c: Read reg error: reg=300a
[15-20-20.446][ 4.229458] camera ov5640 is not found
[15-20-20.446][ 4.233851] ov5640_mipi_v3 9-003c: 9-003c supply DOVDD not found, using dummy regulator
[15-20-20.454][ 4.242038] ov5640_mipi_v3 9-003c: 9-003c supply DVDD not found, using dummy regulator
[15-20-20.486][ 4.249983] ov5640_mipi_v3 9-003c: 9-003c supply AVDD not found, using dummy regulator
[15-20-20.511][ 4.291866] ov5640_mipi_v3 9-003c: Read reg error: reg=300a
[15-20-20.512][ 4.297444] camera ov5640 is not found

[joanxie]

pls share your connection picture and your test steps, let me double check it, what bsp do you use? do you use demo images or your own built images?

[Jen2]

Is there any problem with my operation steps?

[Jen2]

My bsp version is 4.14.98, and the download link ishttps://www.nxp.com/webapp/sps/download/license.jsp?colCode=L4.14.98_2.0.0_MX8QM&appType=file1&DOWNL... ,put it into (tmp/deploy/images/imx8qmmek) directory of yocto, execute (sudo dd if=fsl-image-validation-imx-imx8qmmek.sdcard of=/dev/sde bs=1M conv=fsync) command to burn it into the SD card, start from the SD card and interrupt the u-boot input command(setenv fdt_file 'fsl-imx8qm-mek-ov5640.dtb'    saveenv   boot).

[joanxie · Accepted solution]

did you test this ov5640 on other board successfully before? or did you change another mini-SAS cable to test? and check if you Plug in the  mini-SAS cable into i,mx8qm board tight enough, your steps are correct

[Jen2]

I changed a new MINISASTOCSI module and tested it successfully. The previous module is broken. Thank you for your help!

[Jen2]

I suspect that there is a hardware failure in my MINISASTOCSI module. I have checked that the mini-SAS cable is plugged tight enough.

[Jen2]

i2c_transfer()  return error -5 or -110, why?

[joanxie]

pls share the detailed logfile with this error and why did you get this

[Jen2]

I found a more intuitive problem.

When the mipi csi0 interface is not inserted into the MINISASTOCSI module, use the oscilloscope to measure B11(MIPI_CSI0_I2C0_SCL), which is a high level of 1.8V.

When the MINISASTOCSI module is inserted into the interface, use the oscilloscope to measure B11, and the SCL is pulled down to 0.5V.

Can this explain the hardware failure of the MINISASTOCSI module?

[joanxie]

I have mailed to you pls check it