Hello,
A custom board included an iMX6 DualLite with a LVDS and HDMI display split as below:
The LVDS is working properly while the HDMI display is not working. The test criteria is based on the imx-test autorun-fb0.sh.
I has been reviewing the different variables, as the HDMI display properties, hardware schematic and layout, u-boot, kernel drivers and discussions (here and there) regarding HDMI and dual display using the iMX6 series.
Due to the big quantity of variables that could be involved, I will share many of those through pastebin.com trying to keep the post short.
Configuration:
Booting (log):
After boot (setup):
Testing:
Display:
Comments:
I appreciated any suggestion regarding this situation. I've run out of options or variables to look at.
Thanks
Solved! Go to Solution.
Hello,
The issue is solved. The LVDS and HDMI are working together.
Below the answers to previous comments:
Below the final configuration.
The testing was performed using fb-test.
The display is the same Wacom Cintiq Companion 2.
After solve this situation, a new issue show up regarding the clock reconfiguration once the HDMI is connected. Basically, the LVDS clock change from 51MHz ro 20MHz causing visual defects. To solve the issue, the display parent clock (ipu1-di1) was changed to use a different clock, as show the Device tree.
Hello,
The issue is solved. The LVDS and HDMI are working together.
Below the answers to previous comments:
Below the final configuration.
The testing was performed using fb-test.
The display is the same Wacom Cintiq Companion 2.
After solve this situation, a new issue show up regarding the clock reconfiguration once the HDMI is connected. Basically, the LVDS clock change from 51MHz ro 20MHz causing visual defects. To solve the issue, the display parent clock (ipu1-di1) was changed to use a different clock, as show the Device tree.