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

From: Peter Maydell
Subject: [Bug 1914535] Re: PL110 8-bit mode is not emulated correctly
Date: Wed, 24 Feb 2021 10:53:18 -0000

I think unless you can either (a) show that QEMU is behaving differently
from the real hardware or (b) point at what bit of the hardware
documentation QEMU's implementation is not following, then this doesn't
really sound like it's a bug in QEMU.

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  PL110 8-bit mode is not emulated correctly

Status in QEMU:

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

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