Just as with all other TLB operations, we can only use the TLB if the render
area is aligned to tile boundaries. If it is not, then the operation would
overwrite pixels outside the render area, which is not allowed.
In this case, we can't even emit a previous TLB load to fix this because the
TLB has the multisampled attachment, not the resolve attachment, which is
just a destination buffer for the tile store.
Because the condition for tile alignment has to be determined for each
subpass, we handle this by storing this information in the attachment
state of the command buffer with the start of each subpass. We store
whether the attachment is to be resolved and whether it can use the
TLB (considering tile alignment restrictions).
Reviewed-by: Alejandro Piñeiro <apinheiro@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/14752>
Iago Toral Quiroga
668653f830