AMD is making significant strides in enhancing its Linux amdgpu driver by adding support for HDMI 2.1, a crucial feature for the upcoming Steam Machine. This update, noted by AMD developer Harry Wentland, introduces HDMI FRL (Fixed Rate Link) support, which allows for higher bandwidth on compatible HDMI cables. This advancement enables support for higher resolutions, dynamic HDR, and Variable Refresh Rate, which were not possible with the previous HDMI 2.0 standard. Although the current update represents only a subset of HDMI compliance, further enhancements are on the horizon. The Display Stream Compression (DSC), which facilitates even higher resolutions and frame rates up to 10K at 100 Hz, is still undergoing testing and will be included in future updates. AMD's commitment to full HDMI 2.1 compliance is evident, with developers indicating that a complete implementation will be available once all patches are ready and pass compliance testing.