GPU Frequency Handling Within The Intel DRM Driver

Intel Open-Source Technology Center developer Ben Widawsky has written a blog post about frequency handling within the i915 DRM driver.

Ben explained the dynamically changing frequency handling within the Intel DRM driver, which for modern hardware is requesting a frequency from the firmware, which may or may not honor that request. This firmware-based frequency handling has been in place since the Gen6 days and Ben's post goes on to cover all of the complexities of the frequency handling for this open-source driver.

If you are interested in some technical reading this Sunday and open-source graphics drivers get you excited, go see Ben's blog post. This weekend he also wrote post four of his PPGTT series.