R8 and GR88 dma_bufs are already supported for Intel, but not ARM https://lists.freedesktop.org/archives/mesa-commit/2015-July/057676.html ChromeOS will use it for video decoding.
Hey, just a note that Stanimir Varbanov reported on both gstreamer and mesa devel that he added that already for Qualcomm driver. As this is a Gallium driver, I suppose he also added all the required bits to map the new formats. So ideally, contact him before re-writing this. http://gstreamer-devel.966125.n4.nabble.com/Re-gstreamer-v4l2videodec-plugin-td4676823.html
Please see the patchset at https://patchwork.freedesktop.org/series/7206/
Ftr there is no "ARM" but specific drivers. Stan's work covered the code for the gallium drivers and the freedreno driver. The r600 and radeonsi (gallium) drivers already had the required driver changes prior to his work :-) Thus apart from the i965, freedreno, r600 and radeonsi everyone else will need to add support for their driver. Please file separate bugs (set severity to enhancement) with the driver that you're interested in. Patches would be better though ;-)
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