On Wed 15 Mar 2017, Jason Ekstrand wrote:
> Fun story: This will implicitly handle the (invalid) case of trying to
> create a MCS for a 16xMSAA surface that's more than 8k wide. :-)  We may
> want to keep the check in init_mcs for clarity and because it's in the docs
> but the extra validation is nice.

Nice. I like it when a concise, general case unexpectedly supercedes
seemingly unrelated special cases. Let's do more of that in isl :)

Leaving the validation in get_mcs_surf() is ok with me. The extra code
and comment helps clarify things. But if someone does
delete it, I'm ok with that too.
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