backends/drm: don't allow tearing until the cursor plane is disabled
Once tearing is enabled, atomic tests that try to disable the cursor plane will fail.
(cherry picked from commit 21b11326)
Co-authored-by: Xaver Hugl xaver.hugl@gmail.com
Once tearing is enabled, atomic tests that try to disable the cursor plane will fail.
(cherry picked from commit 21b11326)
Co-authored-by: Xaver Hugl xaver.hugl@gmail.com