Purely conjecture, but I think the original locking inversion with the legacy page flip code between flipping and ttm's bo move function shoudn't exist anymore with atomic: With atomic the bo pinning and actual modeset commit is completely separated in the code patsh.
This annotation was originally added in commit 060810d7abaabcab282e062c595871d661561400 Author: Ben Skeggs <[email protected]> Date: Mon Jul 8 14:15:51 2013 +1000 drm/nouveau: fix locking issues in page flipping paths due to commit b580c9e2b7ba5030a795aa2fb73b796523d65a78 Author: Maarten Lankhorst <[email protected]> Date: Thu Jun 27 13:48:18 2013 +0200 drm/nouveau: make flipping lockdep safe Signed-off-by: Daniel Vetter <[email protected]> Cc: Maarten Lankhorst <[email protected]> Cc: Ben Skeggs <[email protected]> Cc: Dave Airlie <[email protected]> Cc: [email protected] --- I might be totally wrong, so this definitely needs testing :-) Cheers, Daniel --- drivers/gpu/drm/nouveau/nouveau_bo.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/nouveau/nouveau_bo.c b/drivers/gpu/drm/nouveau/nouveau_bo.c index 7806278dce57..a7b2a9bb0ffe 100644 --- a/drivers/gpu/drm/nouveau/nouveau_bo.c +++ b/drivers/gpu/drm/nouveau/nouveau_bo.c @@ -776,7 +776,11 @@ nouveau_bo_move_m2mf(struct ttm_buffer_object *bo, int evict, bool intr, return ret; } - mutex_lock_nested(&cli->mutex, SINGLE_DEPTH_NESTING); + if (drm_drv_uses_atomic_modeset(drm->dev)) + mutex_lock(&cli->mutex); + else + mutex_lock_nested(&cli->mutex, SINGLE_DEPTH_NESTING); + ret = nouveau_fence_sync(nouveau_bo(bo), chan, true, intr); if (ret == 0) { ret = drm->ttm.move(chan, bo, &bo->mem, new_reg); -- 2.27.0 _______________________________________________ Nouveau mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/nouveau
