[gentoo-user] Do I need firmware for an integrated graphics unit?

[Alan Mackenzie <acm@muc.de>]

Hello, Gentoo.

I've just treated myself to a new machine based on a Ryzen 9 7900
processor.  I chose the second newest generation so as not to get caught
out with not quite debugged systems like I did the last time round.

Anyhow, I'm up to the stage of configuring the kernel, and I'm stuck at
the bit where I need to specify the firmware to be incorporated into the
kernel for the integrated graphics processor.

The Gentoo documentation is unhelpful to put it mildly.  In the AMDGPU
document in the Gentoo Wiki, they talk about _cards_, not integrated
graphics units, and it is not clear whether the authors are even aware of
such graphics units, despite the fact they've existed for many years.
The methods they give for divining the necessary firmware files fail
hopelessly on my 7900 system.

I'm not even sure whether I need to put any firmware into the kernel at
all; maybe it's already fully contained in the processor.  That's how
good the doc is, after ~3 hours searching the web.

So, rant mode off!  Would a Gentoo expert please tell me where I can
discover whether I need such firmware, and if so what.

Many thanks in advance!

-- 
Alan Mackenzie (Nuremberg, Germany).