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

2021-03-22 Thread Peter Maydell
** Changed in: qemu Status: New => Invalid -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1914535 Title: PL110 8-bit mode is not emulated correctly Status in QEMU: Invalid Bug description

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

2021-02-24 Thread Peter Maydell
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. -- You received this bug notification because you

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

2021-02-23 Thread Vadim Averin
Well... I don't have any ARM Versatile Express board. Also, documentation and manuals are not saying much about it -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1914535 Title: PL110 8-bit mode is n

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

2021-02-22 Thread Peter Maydell
On Mon, 22 Feb 2021 at 12:18, Vadim Averin <1914...@bugs.launchpad.net> wrote: > > So how can I manage it to display grayscale? Programme the palette with exclusively shades of grey ? The question here really is: is QEMU behaving differently from the real vexpress-a15 hardware here? If it is, the

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

2021-02-22 Thread Vadim Averin
So how can I manage it to display grayscale? -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1914535 Title: PL110 8-bit mode is not emulated correctly Status in QEMU: New Bug description: When

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

2021-02-19 Thread Peter Maydell
Anyway, on first investigation I'm not sure what QEMU's pl11x model is doing wrong. The 8-bit mode is a palette-based setup, where the guest must program in the RGB values it wants to use into the palatte registers as RGB555 data: https://developer.arm.com/documentation/ddi0293/c/programmer-s-m

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

2021-02-19 Thread Vadim Averin
So, were you able to reproduce it? -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1914535 Title: PL110 8-bit mode is not emulated correctly Status in QEMU: New Bug description: When the emulat

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

2021-02-19 Thread Peter Maydell
Lucky I looked at your screenshot, as half the repro instructions are only given in that! When the guest gets to a shell prompt, one needs to type: # fbset -depth 8 # fbset # dd if=/dev/urandom of=/dev/fb0 -- You received this bug notification because you are a member of qemu- devel-ml, which i

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

2021-02-15 Thread 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/mmc

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

2021-02-15 Thread Peter Maydell
Do you have a test case (QEMU command line and all necessary image files) that demonstrates this, please ? ** Tags added: arm -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1914535 Title: PL110 8-