On Fri, Dec 12, 2014 at 4:16 PM, Griffis, Brad [off-list ref] wrote:

How are you configuring ti,charge-delay in your dts?  I've seen this behavior on some custom boards where we were using a smaller charge delay (0x400) to begin with, and by upping it to 0xb000 we resolved the issue.  These patches however already specified ti,charge-delay = 0xb000 by default so this would surprise me that it's still seeing that issue.  Was the touchscreen working as expected before these new patches, or does it have issues both ways?

I have created a DTS for Beaglebone Black with 4 wire touchscreen and
display which works on 3.18 stable and tsc-devel, omap2plus_defconfig
with tsc and tilcdc support.
It seems that with lcdc disabled, I am not getting false reports but
when I'm activating the lcdc, I get a lot of false pen-downs/pen-ups.
Even with tilcdc enabled, after it prints "timeout waiting for
framedone" and the screen get blanked (white), the noise is gone.

Regards,
Catalin.