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LVDS disabling DE sync signal

Question asked by Dig Kleppe on Nov 13, 2017
Latest reply on Nov 23, 2017 by Dig Kleppe

Hi,

Case: LVDS display on imx6 Solo Linux 3.14

The display sometimes gets out of sync. The LCD can work wit H-and Vsync or DE. The LCD datasheet says nothing about supplying all syncs.

We measured that all these signals are present in the LVDS data. We expected  that when the hsync-active,  vsync-active and de-active when not mentioned in the DTB these would be ignored. The corresponding  LVDS bits should be low (or high?).

We measured that all the signals are present. It seems that this is the reason for our troubles.

I found this post:     https://community.nxp.com/thread/302384

The H-and V sync cannot be disabled. How about the DE?

Dig

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