[Gta04-owner] New LetuxOS Kernels and some tricks and thoughts

[H. Nikolaus Schaller]

Hi,
just a small update

> Am 21.05.2019 um 10:22 schrieb H. Nikolaus Schaller <hns at goldelico.com>:
> 
> Hi,
> there are new LetuxOS kernels:
> 
> 	letux-5.2-rc1

we now have letux-5.2-rc3 ...

> 	letux-5.1.3
> 	letux-5.0.17
> 	letux-4.19.44
> 	letux-4.14.120 

... and merged upstream here ...

> 
> Please see:
> 
> 	projects.goldelico.com/p/gta04-kernel/
> 
> Unfortunately display drivers in letux-5.2-rc1 for almost all devices are broken. So please either help
> to fix the issues or wait for a later -rc.

... and all panel drivers seem to be fixed now.

It was very different:

GTA04/L2804: the spi-cs-high legacy handler was broken again
L3704 & L7004: the panel driver had to be replaced by the generic panel-simple
Pyra: it was not the display driver but a bug in the pca953x gpio expander which wasn't programmed any more

There is still a minor issue with the PWM backlight for the combination of BeagleBoard Black + 4.3 inch panel
cape. It does not work for 4.19 but for 5.0 and later.

> 
> BR and happy tinkering,

same again :)
Nikolaus