frontends/va: Unlock driver mutex for SyncSurface/Buffer fence wait
Only keep context mutex locked while waiting for fence.
This fixes issue with multi-threaded use of VAAPI where SyncSurface
and SyncBuffer would block all contexts, even those used in different
threads. The issue exists for all API calls, however in most cases this
is not a big deal as most calls will return fast, but sync is expected
to take up to tens of ms.
Reviewed-by: Ruijing Dong <ruijing.dong@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/33165>
2 files changed
