> ...and in merging my code with Alyssa's new panfrost format modifier > support, I see panfrost does the opposite of this and treats a format > modifier list of only INVALID as "don't care". I modeled the new nouveau > behavior on the Iris driver. Now I'm not sure which is correct :-(
....and neither am I. Uh-oh. I modeled the panfrost code after v3d_resource_create_with_modifiers, which treats INVALID as "don't care". I can confirm the panfrost code works (in the sense that it's functional on the machines I've tested), but I don't know if it is actually correct. I think it is, since otherwise you end up using linear in places it's unnecessary, but I'm not sure where this is spec'd.
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