Connect VGA screen on imx6 board

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Connect VGA screen on imx6 board

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il_mix
Contributor II

Hi everyone,

My imx6 board is just arrived. I've connected (almost) everything and the Android SO seems to start and recognize keyboard inputs (tested via the serial debug port).

I would like to "see" something, but I don't have any HDMI/LVDS screen at the moment. I tried to connecte a VGA screen with an HDMI-VGA adapter (like this one http://www.ebay.com/itm/HDMI-Male-to-VGA-Female-Video-Cable-Cord-Converter-Adapter-for-PC-Laptop-Bla... ) but without success. I suppose that, if this "can" work, it first needs some settings in the OS configuration.

Does anyone have some hints to use a VGA screen on this board?

Thanks!

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il_mix
Contributor II

As a "workaround", I bought an HDMI-DVI adapter like this one

https://www.hama.com/39034036/hama-hdmi-m-dvi-f-adapter

and connected the board to the DVI inteface of the screen.

Everything seems to work now.

By the way, if someone have some hints for the HDMI-VGA adapter it could still be useful for other users.

Thanks

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ruchikshastri
Contributor I

I am also not been able to successfully connect hdmi to vga converter. Please if someone can help on what parameter to change to get it working, it would be really helpful.

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Yuri
NXP TechSupport
NXP TechSupport

Strictly speaking,  Android HDMI I/F should not be used with HDMI-to-DVI converter.

In addition to DVI signals HDMI provides control lines (I2C) for configuring, audio, hot plugging.

http://www.hdmi.org/manufacturer/specification.aspx

Perhaps the following may help, but note, now Freescale BSP does not support the Boundary board.

http://boundarydevices.com/dvi-support-on-i-mx6-boards

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SergioSolis
NXP Employee
NXP Employee

I have never used a converter like the one you are showing, but I believe there should be no problem.

Do you have a terminal window open?, what do you see when you plug the screen?, any errors?

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il_mix
Contributor II

Attached you find the terminal output.

SabreLogHDMI2VGAStartup.txt: log with screen connected before turning on the board

SabreLogHDMI2VGAEnd.txt: log with screen plugged in at the end of the startup process

Plugging in the screen at the end promt these lines in the log:

mxc_hdmi mxc_hdmi: Read EDID again

mxc_hdmi mxc_hdmi: No modes read from edid

mxc_hdmi mxc_hdmi: create default modelist

fbcvt: 1920x1080@60: CVT Name - 2.073M9

I suppose that the board can't get some information via HDMI. About this, I've used this adapter with a RaspberryPi board, and I had to set some prliminary configuration (can't remember hich one...) due to the fact that the board can't get some screen informations via HDMI with this adapter.

With both configuration (screen plugged before power on, screen plugged at the end of the startup process) the screen remains blank, without input.

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