linux-kernel - [PATCH 2/2] drm/mediatek: clear pending flag when cmdq packet is done.

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Date:   Sat, 1 May 2021 11:13:39 +0800
From:   Yongqiang Niu <yongqiang.niu@...iatek.com>
To:     Chun-Kuang Hu <chunkuang.hu@...nel.org>,
        Rob Herring <robh+dt@...nel.org>
CC:     Philipp Zabel <p.zabel@...gutronix.de>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Mark Rutland <mark.rutland@....com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        <dri-devel@...ts.freedesktop.org>, <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>,
        <Project_Global_Chrome_Upstream_Group@...iatek.com>,
        Chun-Hung Wu <chun-hung.wu@...iatek.com>,
        Yongqiang Niu <yongqiang.niu@...iatek.com>,
        CK Hu <ck.hu@...iatek.com>
Subject: [PATCH 2/2] 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: CK Hu <ck.hu@...iatek.com>
Signed-off-by: Yongqiang Niu <yongqiang.niu@...iatek.com>
---
 drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 57 ++++++++++++++++++++++++++++++---
 1 file changed, 52 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
index c37881b..6a3cf47 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
@@ -231,18 +231,57 @@ static void ddp_cmdq_cb(struct cmdq_cb_data data)
 {
 	struct mtk_cmdq_cb_data *cb_data = data.data;
 	struct mtk_drm_crtc *mtk_crtc;
+	struct mtk_crtc_state *state;
+	unsigned int i;
 
 	if (!cb_data) {
 		DRM_ERROR("cmdq callback data is null pointer!\n");
 		return;
 	}
 
+	if (data.sta == CMDQ_CB_ERROR) {
+		DRM_WARN("cmdq callback error!!\n");
+		goto destroy_pkt;
+	}
+
 	mtk_crtc = cb_data->mtk_crtc;
 	if (!mtk_crtc) {
 		DRM_ERROR("cmdq callback mtk_crtc is null pointer!\n");
 		goto destroy_pkt;
 	}
 
+	state = to_mtk_crtc_state(mtk_crtc->base.state);
+
+	if (state->pending_config) {
+		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);
+
+			if (plane_state->pending.config)
+				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);
+
+			if (plane_state->pending.async_config)
+				plane_state->pending.async_config = false;
+		}
+		mtk_crtc->pending_async_planes = false;
+	}
+
 	mtk_drm_finish_page_flip(mtk_crtc);
 
 destroy_pkt:
@@ -403,7 +442,8 @@ 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) {
@@ -423,9 +463,12 @@ 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) {
@@ -445,9 +488,13 @@ 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