This is the third part of the documentation for the Runtime Power Management (RPM) subsystem of the Intel Linux Kernel Graphics Driver, also known as i915.ko. In this part I will explain the power management interactions between the graphics device and the rest of the system.
Welcome to the second part of the Runtime PM (RPM) documentation. On the first part I gave an overview of the Intel Linux Kernel Graphics Runtime PM infrastructure.
Since more than a year ago the Intel Linux Graphics team has been working on the Runtime Power Management (RPM) implementation for our Kernel driver, i915.ko.
I’ve had this post sitting in my drafts for the last 7 months. The code is stale, but the concepts are correct. I had intended to add some pictures before posting, but it’s clear that won’t happen now.
