Hi Janneke,

On Sun, 16 Feb 2020 19:27:41 +0100
Danny Milosavljevic <dannym@scratchpost.org> wrote:

> It should be possible (and much less weird) for the vendor to just enable the
> TFT display in u-boot and display stuff there.
> 
> (linux-sunxi, the dev group for another ARM SoC vendor, does it just fine in
> mainline u-boot--so it is possible and can maybe be copied)

I came across an example u-boot configuration for LCD screen:

https://github.com/Openvario/meta-openvario/blob/warrior/recipes-bsp/u-boot/files/openvario-57-lvds/openvario_defconfig

especially 

CONFIG_VIDEO_LCD_MODE="x:640,y:480,depth:18,pclk_khz:25000,hs:1,vs:1,le:157,ri:2,up:42,lo:2,sync:3,vmode:0"
CONFIG_VIDEO_LCD_PANEL_LVDS=y
CONFIG_VIDEO_LCD_BL_PWM="PB2"
CONFIG_VIDEO_LCD_BL_PWM_ACTIVE_LOW=n

We'd still need to get the timing parameters (CONFIG_VIDEO_LCD_MODE) for the Pinebook Pro (from the panel datasheet).
And that's if that thing is connected via LVDS in the first place.

But that's all moot if your Pinebook Pro is bricked for good.