Async update callbacks are expected to set the old_fb in the new_state
so prepare/cleanup framebuffers are balanced.
Cc: <stable@xxxxxxxxxxxxxxx> # v4.14+
Fixes: 224a4c970987 ("drm/msm: update cursors asynchronously through atomic")
Suggested-by: Boris Brezillon <boris.brezillon@xxxxxxxxxxxxx>
Signed-off-by: Helen Koike <helen.koike@xxxxxxxxxxxxx>
Acked-by: Rob Clark <robdclark@xxxxxxxxx>
---
Hello,
This was tested on the dragonboard 410c using igt plane_cursor_legacy and
kms_cursor_legacy and I didn't see any regressions.
Changes in v4:
- add acked by tag
Changes in v3: None
Changes in v2:
- update CC stable and Fixes tag
drivers/gpu/drm/msm/disp/mdp5/mdp5_plane.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/gpu/drm/msm/disp/mdp5/mdp5_plane.c b/drivers/gpu/drm/msm/disp/mdp5/mdp5_plane.c
index 9d9fb6c5fd68..1105c2433f14 100644
--- a/drivers/gpu/drm/msm/disp/mdp5/mdp5_plane.c
+++ b/drivers/gpu/drm/msm/disp/mdp5/mdp5_plane.c
@@ -502,6 +502,8 @@ static int mdp5_plane_atomic_async_check(struct drm_plane *plane,
static void mdp5_plane_atomic_async_update(struct drm_plane *plane,
struct drm_plane_state *new_state)
{
+ struct drm_framebuffer *old_fb = plane->state->fb;
+
plane->state->src_x = new_state->src_x;
plane->state->src_y = new_state->src_y;
plane->state->crtc_x = new_state->crtc_x;
@@ -524,6 +526,8 @@ static void mdp5_plane_atomic_async_update(struct drm_plane *plane,
*to_mdp5_plane_state(plane->state) =
*to_mdp5_plane_state(new_state);
+
+ new_state->fb = old_fb;
}
static const struct drm_plane_helper_funcs mdp5_plane_helper_funcs = {
--
2.20.1
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