Intel Linux Graphics Driver Wrapping Up Adaptive Sync SDP Support

Written by Michael Larabel in Intel on 19 February 2024 at 06:08 AM EST. 4 Comments
The Intel "i915" LInux kernel graphics driver has been working to wrap-up support for enabling Adaptive Sync SDP for DisplayPort (DP) for their graphics cards.

This Adaptive Sync Secondary Data Packet (SDP) support has been described by the patch series as:
"An Adaptive Sync SDP allows a DP protocol converter to forward Adaptive Sync video with minimal buffering overhead within the converter. An Adaptive-Sync-capable DP protocol converter indicates its support by setting the related bit in the DPCD register.

Computes AS SDP values based on the display configuration, ensuring proper handling of Variable Refresh Rate (VRR) in the context of Adaptive Sync."

Sent out this past Friday were the v8 patches that refactor the Adaptive Sync SDP code and make various other improvements. This is also the first time the patches were sent to dri-devel, hopefully indicating that the Intel engineers involved are growing comfortable with this feature work and soliciting wider code review.
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