An independent developer had decided to port the HDMI audio work from the -radeonhd driver over to -ati. This code has not yet been tested, but it can be found on the ATI driver mailing list. Once this patch has been verified, cleaned up, and pushed into the driver's master branch, this means there is one less difference between these two open-source drivers that both support the same ATI R500/600/700 graphics hardware.
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