vc4_plane_atomic_async_update() calls vc4_plane_atomic_check()
which in turn calls vc4_plane_setup_clipping_and_scaling(), and since
commit 58a6a36fe8e0 ("drm/vc4: Use
drm_atomic_helper_check_plane_state() to simplify the logic"), this
function accesses plane_state->state which will be NULL when called
from the async update path because we're passing the current plane
state, and plane_state->state has been assigned to NULL in
drm_atomic_helper_swap_state().
Pass the new state instead of the current one (the new state has
->state set to a non-NULL value).
Signed-off-by: Boris Brezillon <boris.brezillon@xxxxxxxxxxx>
---
Changes in v2:
- Pass the new state instead of plane->state (suggested by Eric)
---
drivers/gpu/drm/vc4/vc4_plane.c | 15 +++++++++++++--
1 file changed, 13 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/vc4/vc4_plane.c b/drivers/gpu/drm/vc4/vc4_plane.c
index 1728fb7d00ba..c3ded0ba0441 100644
--- a/drivers/gpu/drm/vc4/vc4_plane.c
+++ b/drivers/gpu/drm/vc4/vc4_plane.c
@@ -854,7 +854,7 @@ void vc4_plane_async_set_fb(struct drm_plane *plane, struct drm_framebuffer *fb)
static void vc4_plane_atomic_async_update(struct drm_plane *plane,
struct drm_plane_state *state)
{
- struct vc4_plane_state *vc4_state = to_vc4_plane_state(plane->state);
+ struct vc4_plane_state *vc4_state, *new_vc4_state;
if (plane->state->fb != state->fb) {
vc4_plane_async_set_fb(plane, state->fb);
@@ -875,7 +875,18 @@ static void vc4_plane_atomic_async_update(struct drm_plane *plane,
plane->state->src_y = state->src_y;
/* Update the display list based on the new crtc_x/y. */
- vc4_plane_atomic_check(plane, plane->state);
+ vc4_plane_atomic_check(plane, state);
+
+ new_vc4_state = to_vc4_plane_state(state);
+ vc4_state = to_vc4_plane_state(plane->state);
+
+ /* Update the current vc4_state pos0, pos2 and ptr0 dlist entries. */
+ vc4_state->dlist[vc4_state->pos0_offset] =
+ new_vc4_state->dlist[vc4_state->pos0_offset];
+ vc4_state->dlist[vc4_state->pos2_offset] =
+ new_vc4_state->dlist[vc4_state->pos2_offset];
+ vc4_state->dlist[vc4_state->ptr0_offset] =
+ new_vc4_state->dlist[vc4_state->ptr0_offset];
/* Note that we can't just call vc4_plane_write_dlist()
* because that would smash the context data that the HVS is
--
2.17.1
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