Raspberry Pi CPUFreq Driver & Other Power Management Work For Linux 5.3

[phoronix]

Phoronix: Raspberry Pi CPUFreq Driver & Other Power Management Work For Linux 5.3

The power management changes for Linux 5.3 merge window don't offer any P-State changes or other prominent Intel changes this cycle but there is some other improvements as well as new CPUFreq drivers for CPU frequency scaling...

http://www.phoronix.com/scan.php?page=news_item&px=Linux-5.3-Power-Management

[tildearrow]

Typo:

allowing the UEFI BGRT to be overriden via initrd or configfs, and other fixes.

(you said "and other fixes" before... don't you mean "and other changes"?)

[hotaru]

nice to see that running a mainline kernel on raspberry pi will finally be practical.

[Zajec]

Michael: would you be able to summary current Rasperry Pi upstream support state? Unfortunately there are not more updates coming from the Eric at https://anholt.github.io/twivc4/

[-MacNuke-]

Michael: would you be able to summary current Rasperry Pi upstream support state? Unfortunately there are not more updates coming from the Eric at https://anholt.github.io/twivc4/

While not a blog, work happens here now https://gitlab.freedesktop.org/anholt

[Zajec]

While not a blog, work happens here now https://gitlab.freedesktop.org/anholt

It seems to be mostly Mesa there, but that's something.

I'm still wondering what's missing regarding other subsystems (like I didn't know about cpufreq until recently).

[horizonbrave]

Is Raspberry the only SBC with proper Linux support (mainline)? Thanks

[elatllat]

Do you count x86 SBC (like the Odroid H2)?
There are 248 arm64 dts files in the kernel.
There are 14 listed on Wikipedia https://en.wikipedia.org/wiki/Compar...erating_system

[trilean]

Michael: would you be able to summary current Rasperry Pi upstream support state? Unfortunately there are not more updates coming from the Eric at https://anholt.github.io/twivc4/

It's getting better. My guess is that you'd be able to boot a vanilla kernel. 4.19.57 has 708 patches on top of vanilla and 5.2.0 needs 298. Though I'm not sure how much of this is for the π 4. IIRC it used to be less patches.

https://github.com/raspberrypi/linux/commits/rpi-4.19.y

https://github.com/raspberrypi/linux/commits/rpi-5.2.y

[Guest]

This is pretty cool. I hope rpi will be mainlined some day, and I won't have to pick between a modern kernel with armv8 support, or working SPI.