RFR: 8087370: [odroid] Monocle: Touch is still broken on Odroid

[Fabian Wolter]

On Fri, 29 Apr 2022 14:59:41 GMT, Alexander Scherbatiy <alexsch at openjdk.org> wrote:

>> There are sometimes multitouch events detected, when only a single touch should be detected under certain conditions. This lead to touch events on previous touch positions.
>> 
>> The referenced bug is closed with "won't fix" with the justification it would be platform specific. But this is not correct. It affects all Linux platforms combined with a touch controller, which sends the touch events in an uncommon, but valid(!), order.
>> 
>> We encountered this problem with the touch controller ILI2511 with firmware V6000_V1 in the Tianma display TM070JVHG33. This patch fixes the problem. It is the same patch attached to above bug report.
>
> The 8087370 includes [LinuxStatefulMultiTouchProcessor-fix-for-1.patch](https://bugs.openjdk.java.net/secure/attachment/50236/LinuxStatefulMultiTouchProcessor-fix-for-1.patch) to fix the first described case:
> 
> 1. Consider you're touching the screen with two fingers, for example coordinates
> of one point is ~100,100 and second point is ~200,200. While still touching around
> the same points some events are reported with one or another point
> to be either 100,200 or 200,100.
> 
> Is it reproduced on your system as well?
> 
> It relates to `8282104: Node zoom/rotate flickers on Raspberry Pi with Touchscreen` with fix #737 which suggests to not take LinuxInput.ABS_X/Y events into account for non zero slots instead just skipping them for all slots.

Unfortunately, I can't afford time to burrow into the issue again for writing tests at the moment. @AlexanderScherbatiy is there any chance you can provide a test case?

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PR Comment: https://git.openjdk.org/jfx/pull/641#issuecomment-1584015830