AMDGPU Linux Driver Preps For HDMI 2.1 Compliance Testing

Source Domain: www.phoronix.com

While not as exciting as features like HDMI 2.1 FRL and Display Stream Compression itself, as part of AMD’s efforts to provide a fully open-source HDMI 2.1 driver implementation for AMDGPU, new code is being prepped for their kernel driver to support the HDMI compliance testing efforts.

A set of 32 patches providing the latest AMDGPU Display Code (DC) updates were sent out today. No new HDMI features for end-users this round but there is some refactoring of the AMDGPU DM code to make it more modular, some minor enhancements, and then cleaning up the HDMI pipeline and preparing for compliance automation support.

The AMDGPU DC support for HDMI compliance automation is support around the FRL link rate testing when working with the Teledyne M41h compliance automation.

The Teledyne M41h is a HDMI video generator and HDMI protocol analyzer that can be used as an HDMI compliance testing tool for vendor pre-testing or self-testing against HDMI compliance. The device can help ensure proper handling for FRL, DSC, link training, forward error correction, VRR, HDR10+ SSTM, HDCP, and other features of the HDMI specification. One of these HDMI testing devices looks to run for about $2399 USD.

This DC patch series preps for that HDMI compliance testing. The patches also add more KUnit test coverage to the AMDGPU DC code for hopefully catching more regressions in a timely manner.

Given the timing of these patches, they aren’t expected to be mainlined until the Linux v7.3 cycle later in the year.

Source