The util helpers were looking for a non-void channels in a non-mixed
format and returning its snorm/unorm state. However, compressed formats
don't have non-void channels, so they always returned false. V3D wants to
use util_format_is_[su]norm for its border color clamping workarounds, so
fix the functions to return the right answer for these.
This now means that we ignore .is_mixed. I could retain the is_mixed
check, but it doesn't seem like a useful feature -- the only code I could
find that might care is freedreno's blit, which has some notes about how
things are wonky in this area anyway.
Reviewed-by: <Roland Scheidegger sroland@vmware.com>
Eric Anholt
08f4a904b3