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drm/vc4: fix fb references in async update

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commit c16b85559d upstream.

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: 539c320bfa ("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>
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190603165610.24614-5-helen.koike@collabora.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Helen Koike
2019-06-03 13:56:09 -03:00
committed by Greg Kroah-Hartman
parent afec706807
commit 3af96f3497
1 changed files with 1 additions and 0 deletions
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1
drivers/gpu/drm/vc4/vc4_plane.c
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@@ -818,6 +818,7 @@ static void vc4_plane_atomic_async_update(struct drm_plane *plane,
drm_atomic_set_fb_for_plane(plane->state, state->fb);
}
swap(plane->state->fb, state->fb);
/* Set the cursor's position on the screen. This is the
* expected change from the drm_mode_cursor_universal()
* helper.