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

[Vadim Averin]

Public bug reported:

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).

** Affects: qemu
     Importance: Undecided
         Status: New

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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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