topic Re: MT9V032 camera on parallel port in i.MX Processors

MT9V032 camera on parallel port

richardwoodham — Thu, 31 Aug 2017 10:16:07 GMT

Linux version 4.1.15

Machine model: Variscite i.MX6 QUAD VAR-DART Smart Device Board

I added mt9v032 support using menuconfig & added an entry (marked here in bold)

&i2c3 {
clock-frequency = <100000>;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_i2c3_3>;
status = "okay";

/* DS1307 RTC module */
rtc@0x68 {
compatible = "dallas,ds1307";
reg = <0x68>;
};

mt9v032@5c {
compatible = "aptina,mt9v032";
reg = <0x5c>;

port {
mt9v032_out: endpoint {
link-frequencies = /bits/ 64
<13000000 26600000 27000000>;
};
};
};
};

to the .dtsi file. On boot I get:

[ 1.440565] mt9v032: probe of 2-005c failed with error -2

What does this message mean? The I2C hardware works. I can use i2cdetect to prove it - 0x56 is detected & I can see it on the scope (response is 0x13 - check it out in the datasheet).

The scope says that 0x5c is not being probed during boot (0x68 is). Why not?

Re: MT9V032 camera on parallel port

igorpadykov — Thu, 31 Aug 2017 23:18:47 GMT

Hi Richard

one can try to debug it in probe function with oscilloscope

[RFC,media] mt9v032: Add support for mt9v022 and mt9v024 - Patchwork

using AN4553 Using Open Source Debugging Tools for Linux on i.MX Processors
http://www.nxp.com/assets/documents/data/en/application-notes/AN4553.pdf

also seems phytec has support for this sensor:

ftp://ftp.phytec.de/pub/ImageProcessing/phyFLEX-i.MX6_linux_PD15.1.1/Software/Camera_Patch_PD15.1.1/instruction_guide_vm010-bw_support-phyFLEX-iMX6.txt

Best regards
igor
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