[Bug 1914535] Re: PL110 8-bit mode is not emulated correctly

[Vadim Averin]

Archive with all the demo files (kernel, disk image, dtb file, screenshot of 
the bug):
https://avevad.ddns.net/storage/qbug.tar
QEMU commandline:
qemu-system-arm -serial stdio -M vexpress-a15 -dtb vexpress-v2p-ca15_a7.dtb 
-smp 4  -m 256M -kernel zImage_new  -append "console=ttyAMA0 
root=/dev/mmcblk0p1 loglevel=9 vt.global_cursor_default=0 video=vfb:" -drive 
if=sd,format=raw,file=disk

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https://bugs.launchpad.net/bugs/1914535

Title:
  PL110 8-bit mode is not emulated correctly

Status in QEMU:
  New

Bug description:
  When the emulated pl110/pl111 is switched programmatically to 8-bit
  color depth mode, the display is drawn green and blue, but the real
  PL110 displays grayscale in 8-bit mode.

  The bug appears in qemu-system-arm version 3.1.0 (Debian
  1:3.1+dfsg-8+deb10u8) and qemu-system-arm version 5.2.50
  (v5.2.0-1579-g99ae0cd90d).

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