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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, "jason-jh.lin" <jason-jh.lin@mediatek.com>,
        Enric Balletbo i Serra <enric.balletbo@collabora.com>,
        Chun-Kuang Hu <chunkuang.hu@kernel.org>,
        Sasha Levin <sashal@kernel.org>
Subject: [PATCH 5.13 041/151] drm/mediatek: Fix cursor plane no update
Date:   Mon, 16 Aug 2021 15:01:11 +0200
Message-Id: <20210816125445.430473827@linuxfoundation.org>
In-Reply-To: <20210816125444.082226187@linuxfoundation.org>
References: <20210816125444.082226187@linuxfoundation.org>
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From: jason-jh.lin <jason-jh.lin@mediatek.com>

[ Upstream commit 1a64a7aff8da352c9419de3d5c34343682916411 ]

The cursor plane should use the current plane state in atomic_async_update
because it would not be the new plane state in the global atomic state
since _swap_state happened when those hook are run.

Fix cursor plane issue by below modification:
1. Remove plane_helper_funcs->atomic_update(plane, state) in
   mtk_drm_crtc_async_update.
2. Add mtk_drm_update_new_state in to mtk_plane_atomic_async_update to
   update the cursor plane by current plane state hook and update
   others plane by the new_state.

Fixes: 37418bf14c13 ("drm: Use state helper instead of the plane state pointer")
Signed-off-by: jason-jh.lin <jason-jh.lin@mediatek.com>
Tested-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/gpu/drm/mediatek/mtk_drm_crtc.c  |  3 --
 drivers/gpu/drm/mediatek/mtk_drm_plane.c | 60 ++++++++++++++----------
 2 files changed, 34 insertions(+), 29 deletions(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
index 474efb844249..735efe79f075 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
@@ -532,13 +532,10 @@ void mtk_drm_crtc_async_update(struct drm_crtc *crtc, struct drm_plane *plane,
 			       struct drm_atomic_state *state)
 {
 	struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
-	const struct drm_plane_helper_funcs *plane_helper_funcs =
-			plane->helper_private;
 
 	if (!mtk_crtc->enabled)
 		return;
 
-	plane_helper_funcs->atomic_update(plane, state);
 	mtk_drm_crtc_update_config(mtk_crtc, false);
 }
 
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_plane.c b/drivers/gpu/drm/mediatek/mtk_drm_plane.c
index b5582dcf564c..e6dcb34d3052 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_plane.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_plane.c
@@ -110,6 +110,35 @@ static int mtk_plane_atomic_async_check(struct drm_plane *plane,
 						   true, true);
 }
 
+static void mtk_plane_update_new_state(struct drm_plane_state *new_state,
+				       struct mtk_plane_state *mtk_plane_state)
+{
+	struct drm_framebuffer *fb = new_state->fb;
+	struct drm_gem_object *gem;
+	struct mtk_drm_gem_obj *mtk_gem;
+	unsigned int pitch, format;
+	dma_addr_t addr;
+
+	gem = fb->obj[0];
+	mtk_gem = to_mtk_gem_obj(gem);
+	addr = mtk_gem->dma_addr;
+	pitch = fb->pitches[0];
+	format = fb->format->format;
+
+	addr += (new_state->src.x1 >> 16) * fb->format->cpp[0];
+	addr += (new_state->src.y1 >> 16) * pitch;
+
+	mtk_plane_state->pending.enable = true;
+	mtk_plane_state->pending.pitch = pitch;
+	mtk_plane_state->pending.format = format;
+	mtk_plane_state->pending.addr = addr;
+	mtk_plane_state->pending.x = new_state->dst.x1;
+	mtk_plane_state->pending.y = new_state->dst.y1;
+	mtk_plane_state->pending.width = drm_rect_width(&new_state->dst);
+	mtk_plane_state->pending.height = drm_rect_height(&new_state->dst);
+	mtk_plane_state->pending.rotation = new_state->rotation;
+}
+
 static void mtk_plane_atomic_async_update(struct drm_plane *plane,
 					  struct drm_atomic_state *state)
 {
@@ -126,8 +155,10 @@ static void mtk_plane_atomic_async_update(struct drm_plane *plane,
 	plane->state->src_h = new_state->src_h;
 	plane->state->src_w = new_state->src_w;
 	swap(plane->state->fb, new_state->fb);
-	new_plane_state->pending.async_dirty = true;
 
+	mtk_plane_update_new_state(new_state, new_plane_state);
+	wmb(); /* Make sure the above parameters are set before update */
+	new_plane_state->pending.async_dirty = true;
 	mtk_drm_crtc_async_update(new_state->crtc, plane, state);
 }
 
@@ -189,14 +220,8 @@ static void mtk_plane_atomic_update(struct drm_plane *plane,
 	struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
 									   plane);
 	struct mtk_plane_state *mtk_plane_state = to_mtk_plane_state(new_state);
-	struct drm_crtc *crtc = new_state->crtc;
-	struct drm_framebuffer *fb = new_state->fb;
-	struct drm_gem_object *gem;
-	struct mtk_drm_gem_obj *mtk_gem;
-	unsigned int pitch, format;
-	dma_addr_t addr;
 
-	if (!crtc || WARN_ON(!fb))
+	if (!new_state->crtc || WARN_ON(!new_state->fb))
 		return;
 
 	if (!new_state->visible) {
@@ -204,24 +229,7 @@ static void mtk_plane_atomic_update(struct drm_plane *plane,
 		return;
 	}
 
-	gem = fb->obj[0];
-	mtk_gem = to_mtk_gem_obj(gem);
-	addr = mtk_gem->dma_addr;
-	pitch = fb->pitches[0];
-	format = fb->format->format;
-
-	addr += (new_state->src.x1 >> 16) * fb->format->cpp[0];
-	addr += (new_state->src.y1 >> 16) * pitch;
-
-	mtk_plane_state->pending.enable = true;
-	mtk_plane_state->pending.pitch = pitch;
-	mtk_plane_state->pending.format = format;
-	mtk_plane_state->pending.addr = addr;
-	mtk_plane_state->pending.x = new_state->dst.x1;
-	mtk_plane_state->pending.y = new_state->dst.y1;
-	mtk_plane_state->pending.width = drm_rect_width(&new_state->dst);
-	mtk_plane_state->pending.height = drm_rect_height(&new_state->dst);
-	mtk_plane_state->pending.rotation = new_state->rotation;
+	mtk_plane_update_new_state(new_state, mtk_plane_state);
 	wmb(); /* Make sure the above parameters are set before update */
 	mtk_plane_state->pending.dirty = true;
 }
-- 
2.30.2