Comment # 1
on bug 101739
from Roland Scheidegger
My naive conclusion from the description would be that the hw is doing earlyz optimizations when it shouldn't (so, the depth updates happen before the final sample mask modified by the alpha value is known). The driver doesn't set if early z is enabled directly, since it just sets EARLY_Z_THEN_LATE_Z most of the time, and the hw should figure out if early z is possible (taking into account all state), otherwise use late z. If that's the case, then overriding the Z_ORDER to LATE_Z for the db_shader_control value might be necessary in this case. But that's just a guess, I could be completely wrong here - I've got only a very rough idea of radeonsi hw and driver...
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