Phil Elwell

I'll add the ability to disable it when I get a spare moment.

I've pushed patches that should resolve this issue for you. They'll get picked up by future kernel builds.

@AndistormEm Are you running a 5.4 kernel and not using a Pi 4? If so, I understand the problem. There were some recent changes to the way CMA is configured...

It works for me - compare this: ``` pi@raspberrypi:~ $ grep kms /boot/config.txt dtoverlay=vc4-kms-v3d pi@raspberrypi:~ $ aplay -l **** List of PLAYBACK Hardware Devices **** card 0: Headphones [bcm2835 Headphones],...

The kernel headers agree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/tree/include/uapi/linux/serial_reg.h#n27 Since interrupts are enabled for ttyS0 and it seems to work, bit 0 must be receive and bit 1 transmit.

Ignore - wrong thread.

Although the 3B+ has a full 1GB RAM, the ARM cannot see the top 16MB of RAM because that is where the peripherals are mapped. However, this memory isn't wasted...

By the way, that table is wrong - it should really say "0x3F00_0000 .. 0x3FFF_FFFF".

Yes, the memory directly addressable from the ARM is 1008MB.

Re: a Zero W successor - I don't blame you for asking, but our product roadmap is a closely guarded secret.