Re: [RFC PATCH] printk: console: Allow each console to have its own loglevel
From: Chris Down
Date: Thu May 19 2022 - 10:37:22 EST
Hey Geert,
Geert Uytterhoeven writes:
All of the above options are appropriate for "classic" systems,
where the console device is selected using the "console=" option.
On systems using Device tree, the serial console device is selected
using the "chosen/stout-path" property in DT, and the graphical
console is usually auto-detected and auto-enabled through DRM.
Do you envision a way to specify a specific console loglevel on the
kernel command line on such systems?
Interesting question! I hadn't really thought about device tree. I actually
have very little understanding of how it works to be honest :-)
I'm happy to add loglevel support to device tree, I assume I'd add another
property under the chosen node, like chosen/stdout-loglevel.
I have some questions, though:
1. It looks like DT is standardised. Do I need to get standards approval first?
2. Is there documentation on how to reliably test DT changes?
Thanks!
Chris