tree 09a6ee55c4ad3596f9a2eff72a20e1509885ffe2
parent 73449f9a6237fb54d339db08a9912c26cdbb8e6a
author Timur Kristóf <timur.kristof@gmail.com> 1602796632 +0200
committer Timur Kristóf <timur.kristof@gmail.com> 1603918547 +0100

aco/ngg: Export a zero-area triangle when primitive count is 0.

This is a workaround for a bug in Navi 1x NGG HW.

Very rarely, the Navi 1x PA can hang when an NGG workgroup exports
0 total primitives. According to AMD, we always need this workaround
when it is possible that the number of primitives is 0.

Signed-off-by: Timur Kristóf <timur.kristof@gmail.com>
Reviewed-by: Rhys Perry <pendingchaos02@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7232>