linux-kernel - [PATCH v4] drm/mediatek: clear pending flag when cmdq packet is done.

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Date:   Wed, 11 Aug 2021 09:47:48 +0800
From:   Yongqiang Niu <yongqiang.niu@...iatek.com>
To:     Chun-Kuang Hu <chunkuang.hu@...nel.org>
CC:     Rob Herring <robh+dt@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Jassi Brar <jassisinghbrar@...il.com>,
        Yongqiang Niu <yongqiang.niu@...iatek.com>,
        Fabien Parent <fparent@...libre.com>,
        Dennis YC Hsieh <dennis-yc.hsieh@...iatek.com>,
        <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <dri-devel@...ts.freedesktop.org>,
        <Project_Global_Chrome_Upstream_Group@...iatek.com>,
        Hsin-Yi Wang <hsinyi@...omium.org>
Subject: [PATCH v4] drm/mediatek: clear pending flag when cmdq packet is done.

In cmdq mode, packet may be flushed before it is executed, so
the pending flag should be cleared after cmdq packet is done.

Signed-off-by: Yongqiang Niu <yongqiang.niu@...iatek.com>
---
 drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 47 +++++++++++++++++++++++++++++----
 1 file changed, 42 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
index 4c25e33..89f093d 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
@@ -267,6 +267,36 @@ static void ddp_cmdq_cb(struct mbox_client *cl, void *mssg)
 {
 	struct mtk_drm_crtc *mtk_crtc = container_of(cl, struct mtk_drm_crtc, cmdq_cl);
 	struct cmdq_cb_data *data = mssg;
+	struct mtk_crtc_state *state;
+	unsigned int i;
+
+	state = to_mtk_crtc_state(mtk_crtc->base.state);
+
+	state->pending_config = false;
+
+	if (mtk_crtc->pending_planes) {
+		for (i = 0; i < mtk_crtc->layer_nr; i++) {
+			struct drm_plane *plane = &mtk_crtc->planes[i];
+			struct mtk_plane_state *plane_state;
+
+			plane_state = to_mtk_plane_state(plane->state);
+
+			plane_state->pending.config = false;
+		}
+		mtk_crtc->pending_planes = false;
+	}
+
+	if (mtk_crtc->pending_async_planes) {
+		for (i = 0; i < mtk_crtc->layer_nr; i++) {
+			struct drm_plane *plane = &mtk_crtc->planes[i];
+			struct mtk_plane_state *plane_state;
+
+			plane_state = to_mtk_plane_state(plane->state);
+
+			plane_state->pending.async_config = false;
+		}
+		mtk_crtc->pending_async_planes = false;
+	}
 
 	mtk_crtc->cmdq_vblank_cnt = 0;
 	mtk_drm_cmdq_pkt_destroy(mtk_crtc->cmdq_chan, data->pkt);
@@ -423,7 +453,8 @@ static void mtk_crtc_ddp_config(struct drm_crtc *crtc,
 				    state->pending_vrefresh, 0,
 				    cmdq_handle);
 
-		state->pending_config = false;
+		if (!cmdq_handle)
+			state->pending_config = false;
 	}
 
 	if (mtk_crtc->pending_planes) {
@@ -443,9 +474,12 @@ static void mtk_crtc_ddp_config(struct drm_crtc *crtc,
 				mtk_ddp_comp_layer_config(comp, local_layer,
 							  plane_state,
 							  cmdq_handle);
-			plane_state->pending.config = false;
+			if (!cmdq_handle)
+				plane_state->pending.config = false;
 		}
-		mtk_crtc->pending_planes = false;
+
+		if (!cmdq_handle)
+			mtk_crtc->pending_planes = false;
 	}
 
 	if (mtk_crtc->pending_async_planes) {
@@ -465,9 +499,12 @@ static void mtk_crtc_ddp_config(struct drm_crtc *crtc,
 				mtk_ddp_comp_layer_config(comp, local_layer,
 							  plane_state,
 							  cmdq_handle);
-			plane_state->pending.async_config = false;
+			if (!cmdq_handle)
+				plane_state->pending.async_config = false;
 		}
-		mtk_crtc->pending_async_planes = false;
+
+		if (!cmdq_handle)
+			mtk_crtc->pending_async_planes = false;
 	}
 }
 
-- 
1.8.1.1.dirty