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Kenneth Graunke authored
Lionel found actual documentation for this at long last. Apparently it actually is a sampler cache limitation that was mostly fixed on Icelake. Unfortunately, it seems there are still issues with ASTC and non-ASTC sampler views. Still, we can lessen the flush condition from "format mismatch" to "ASTC mismatch", which eliminates most of the flushing here. We also update the documentation to refer to the workaround name.
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