On 4/15/11 3:19 PM, Jesse Barnes wrote:
Or is there a CEA block extension that allows for more granularity?
CEA has bits for the two YCbCr formats too, which we should also parse since there's plenty of 1.3+CEA blocks in the world thanks to HDMI. For CEA blocks version 2 and up (version number in byte 2 of the CEA block, zero-based indexing), (1 << 5) of byte 3 is 4:4:4 and (1 << 4) is 4:2:2. Same byte as what we already check for EDID_BASIC_AUDIO, if that's any clearer. CEA spec contains the same language about always supporting RGB though.
I don't have a good answer for what to do if you have a 1.4+CEA block and the two bitfields are inconsistent, besides violence against the monitor vendor.
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