Messages in this thread Patch in this message | | | From | Helen Koike <> | Subject | [PATCH v2 4/5] drm/vc4: fix fb references in async update | Date | Mon, 11 Mar 2019 23:22:02 -0300 |
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Async update callbacks are expected to set the old_fb in the new_state so prepare/cleanup framebuffers are balanced.
Calling drm_atomic_set_fb_for_plane() (which gets a reference of the new fb and put the old fb) is not required, as it's taken care by drm_mode_cursor_universal() when calling drm_atomic_helper_update_plane().
Cc: <stable@vger.kernel.org> # v4.19+ Fixes: 539c320bfa97 ("drm/vc4: update cursors asynchronously through atomic") Suggested-by: Boris Brezillon <boris.brezillon@collabora.com> Signed-off-by: Helen Koike <helen.koike@collabora.com> Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
--- Hello,
I tested on a Raspberry Pi model B rev2 with igt plane_cursor_legacy and kms_cursor_legacy and I didn't see any regressions.
Changes in v2: - Added reviewed-by tag - updated CC stable and Fixes tag
drivers/gpu/drm/vc4/vc4_plane.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/vc4/vc4_plane.c b/drivers/gpu/drm/vc4/vc4_plane.c index 1babfeca0c92..1235e53b22a3 100644 --- a/drivers/gpu/drm/vc4/vc4_plane.c +++ b/drivers/gpu/drm/vc4/vc4_plane.c @@ -968,7 +968,7 @@ static void vc4_plane_atomic_async_update(struct drm_plane *plane, { struct vc4_plane_state *vc4_state, *new_vc4_state; - drm_atomic_set_fb_for_plane(plane->state, state->fb); + swap(plane->state->fb, state->fb); plane->state->crtc_x = state->crtc_x; plane->state->crtc_y = state->crtc_y; plane->state->crtc_w = state->crtc_w; -- 2.20.1
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