[yocto] [meta-raspberrypi] Waveshare touchscreen

[Trevor Woerner]

On Tue, Jul 3, 2018 at 4:40 AM, Michele Tirinzoni <miketiri at gmail.com>
wrote:

> Anyway, the config.txt is just enough to be able to use the screen with
> touch functionality ? No need to have any driver installed ?
>

These panels have two cables that must be connected to the board: HDMI and
USB.

The HDMI handles all the video. The USB handles power and all the touch
stuff; touch "just works" magically.

In my builds I tend to add:

RDEPENDS_packagegroup-core-x11-utils_remove_pn-packagegroup-core-x11 =
"xinput-calibrator"
PACKAGECONFIG_pn-xserver-nodm-init = "nocursor"

The first line removes the package that keeps popping up the touch
calibrator software on boot. The second line removes the pointer (which
isn't relevant if you're using touch). Both of these assume you're using
x11, I have no idea how to setup wayland similarly.
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