[PATCH 2/2] drm/panel: Add Truly NT35521 panel driver

[Shawn Guo]

On Sun, Aug 08, 2021 at 05:29:30PM +0200, Stephan Gerhold wrote:
> > 2) The driver works good, if the kernel is launched via "fastboot boot".
> >    But if the kernel is flashed to eMMC and launched by bootloader with
> >    splash screen, kernel will fail to bring up the panel.  After kernel
> >    boots up, a blank & unblank cycle can get panel work though.
> > 
> > The problem 2) is not driver generator related.  @Konrad, did you see
> > it on asus-z00t-tm5p5-n35596 driver?
> > 
> 
> Do you have CONFIG_DRM_MSM=y (built-in) instead of =m (module) maybe?
> I think a similar issue exists on MSM8916 but it does not happen
> for some reason if CONFIG_DRM_MSM=m instead of =y. Somehow having it
> load later during the boot process fixes some things there.

Indeed!  I have CONFIG_DRM_MSM=y in my build, and changing it to module
removes the problem.  Thanks much for the hint, Stephan!

Shawn