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Subject[PATCH AUTOSEL 4.9 03/13] drm/vc4: crtc: Use an union to store the page flip callback
Date
From: Maxime Ripard <maxime@cerno.tech>

[ Upstream commit 2523e9dcc3be91bf9fdc0d1e542557ca00bbef42 ]

We'll need to extend the vc4_async_flip_state structure to rely on
another callback implementation, so let's move the current one into a
union.

Reviewed-by: Melissa Wen <mwen@igalia.com>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://lore.kernel.org/r/20220610115149.964394-10-maxime@cerno.tech
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/gpu/drm/vc4/vc4_crtc.c | 20 ++++++++++++++------
1 file changed, 14 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/vc4/vc4_crtc.c b/drivers/gpu/drm/vc4/vc4_crtc.c
index 51d34e7275ab..9d97f535a4d6 100644
--- a/drivers/gpu/drm/vc4/vc4_crtc.c
+++ b/drivers/gpu/drm/vc4/vc4_crtc.c
@@ -717,17 +717,17 @@ struct vc4_async_flip_state {
struct drm_framebuffer *fb;
struct drm_pending_vblank_event *event;

- struct vc4_seqno_cb cb;
+ union {
+ struct vc4_seqno_cb seqno;
+ } cb;
};

/* Called when the V3D execution for the BO being flipped to is done, so that
* we can actually update the plane's address to point to it.
*/
static void
-vc4_async_page_flip_complete(struct vc4_seqno_cb *cb)
+vc4_async_page_flip_complete(struct vc4_async_flip_state *flip_state)
{
- struct vc4_async_flip_state *flip_state =
- container_of(cb, struct vc4_async_flip_state, cb);
struct drm_crtc *crtc = flip_state->crtc;
struct drm_device *dev = crtc->dev;
struct vc4_dev *vc4 = to_vc4_dev(dev);
@@ -749,6 +749,14 @@ vc4_async_page_flip_complete(struct vc4_seqno_cb *cb)
up(&vc4->async_modeset);
}

+static void vc4_async_page_flip_seqno_complete(struct vc4_seqno_cb *cb)
+{
+ struct vc4_async_flip_state *flip_state =
+ container_of(cb, struct vc4_async_flip_state, cb.seqno);
+
+ vc4_async_page_flip_complete(flip_state);
+}
+
/* Implements async (non-vblank-synced) page flips.
*
* The page flip ioctl needs to return immediately, so we grab the
@@ -794,8 +802,8 @@ static int vc4_async_page_flip(struct drm_crtc *crtc,
drm_atomic_set_fb_for_plane(plane->state, fb);
plane->fb = fb;

- vc4_queue_seqno_cb(dev, &flip_state->cb, bo->seqno,
- vc4_async_page_flip_complete);
+ vc4_queue_seqno_cb(dev, &flip_state->cb.seqno, bo->seqno,
+ vc4_async_page_flip_seqno_complete);

/* Driver takes ownership of state on successful async commit. */
return 0;
--
2.35.1
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