[PATCH v2] drm/mediatek: clear pending flag when cmdq packet is done.

[Yongqiang Niu <yongqiang.niu@xxxxxxxxxxxx>]

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@xxxxxxxxxxxx>
Signed-off-by: Yongqiang Niu <yongqiang.niu@xxxxxxxxxxxx>
---
 drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 92 ++++++++++++++++++++++++++++++---
 1 file changed, 85 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
index 40df2c8..8cd107b 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
@@ -73,6 +73,13 @@ struct mtk_crtc_state {
 	unsigned int			pending_vrefresh;
 };
 
+#if IS_REACHABLE(CONFIG_MTK_CMDQ)
+struct mtk_cmdq_cb_data {
+	struct cmdq_pkt			*cmdq_handle;
+	struct mtk_drm_crtc		*mtk_crtc;
+};
+#endif
+
 static inline struct mtk_drm_crtc *to_mtk_crtc(struct drm_crtc *c)
 {
 	return container_of(c, struct mtk_drm_crtc, base);
@@ -224,7 +231,64 @@ struct mtk_ddp_comp *mtk_drm_ddp_comp_for_plane(struct drm_crtc *crtc,
 #if IS_REACHABLE(CONFIG_MTK_CMDQ)
 static void ddp_cmdq_cb(struct cmdq_cb_data data)
 {
-	cmdq_pkt_destroy(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 != 0) {
+		DRM_WARN("cmdq callback error %d!!\n", data.sta);
+		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;
+	}
+
+destroy_pkt:
+	if (cb_data->cmdq_handle)
+		cmdq_pkt_destroy(cb_data->cmdq_handle);
+
+	kfree(cb_data);
 }
 #endif
 
@@ -378,7 +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) {
@@ -398,9 +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) {
@@ -420,9 +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;
 	}
 }
 
@@ -469,13 +541,19 @@ static void mtk_drm_crtc_update_config(struct mtk_drm_crtc *mtk_crtc,
 	}
 #if IS_REACHABLE(CONFIG_MTK_CMDQ)
 	if (mtk_crtc->cmdq_client) {
+		struct mtk_cmdq_cb_data *cb_data;
+
 		mbox_flush(mtk_crtc->cmdq_client->chan, 2000);
 		cmdq_handle = cmdq_pkt_create(mtk_crtc->cmdq_client, PAGE_SIZE);
 		cmdq_pkt_clear_event(cmdq_handle, mtk_crtc->cmdq_event);
 		cmdq_pkt_wfe(cmdq_handle, mtk_crtc->cmdq_event, false);
 		mtk_crtc_ddp_config(crtc, cmdq_handle);
 		cmdq_pkt_finalize(cmdq_handle);
-		cmdq_pkt_flush_async(cmdq_handle, ddp_cmdq_cb, cmdq_handle);
+
+		cb_data = kmalloc(sizeof(*cb_data), GFP_KERNEL);
+		cb_data->cmdq_handle = cmdq_handle;
+		cb_data->mtk_crtc = mtk_crtc;
+		cmdq_pkt_flush_async(cmdq_handle, ddp_cmdq_cb, cb_data);
 	}
 #endif
 	mtk_crtc->config_updating = false;
-- 
1.8.1.1.dirty