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

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Message-Id: <20210422111004.1338867-1-hsinyi@chromium.org>
Date:   Thu, 22 Apr 2021 19:10:04 +0800
From:   Hsin-Yi Wang <hsinyi@...omium.org>
To:     Chun-Kuang Hu <chunkuang.hu@...nel.org>
Cc:     Philipp Zabel <p.zabel@...gutronix.de>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Dennis YC Hsieh <dennis-yc.hsieh@...iatek.com>,
        Jassi Brar <jaswinder.singh@...aro.org>,
        CK Hu <ck.hu@...iatek.com>, dri-devel@...ts.freedesktop.org,
        linux-mediatek@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH] drm/mediatek: clear pending flag when cmdq packet is done.

From: CK Hu <ck.hu@...iatek.com>

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: Hsin-Yi Wang <hsinyi@...omium.org>
---
 drivers/gpu/drm/mediatek/mtk_drm_crtc.c  | 56 +++++++++++++++++++++---
 include/linux/mailbox/mtk-cmdq-mailbox.h |  1 +
 2 files changed, 51 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
index 40df2c823187..051bf0eb00d3 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
@@ -224,6 +224,45 @@ 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)
 {
+	struct cmdq_pkt *pkt = (struct cmdq_pkt *)data.data;
+	struct mtk_drm_crtc *mtk_crtc = (struct mtk_drm_crtc *)pkt->crtc;
+	struct mtk_crtc_state *state = to_mtk_crtc_state(mtk_crtc->base.state);
+	unsigned int i;
+
+	if (data.sta == CMDQ_CB_ERROR)
+		goto destroy_pkt;
+
+	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:
 	cmdq_pkt_destroy(data.data);
 }
 #endif
@@ -377,8 +416,8 @@ static void mtk_crtc_ddp_config(struct drm_crtc *crtc,
 				    state->pending_height,
 				    state->pending_vrefresh, 0,
 				    cmdq_handle);
-
-		state->pending_config = false;
+		if (!cmdq_handle)
+			state->pending_config = false;
 	}
 
 	if (mtk_crtc->pending_planes) {
@@ -398,9 +437,11 @@ 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 +461,11 @@ 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;
 	}
 }
 
@@ -475,6 +518,7 @@ static void mtk_drm_crtc_update_config(struct mtk_drm_crtc *mtk_crtc,
 		cmdq_pkt_wfe(cmdq_handle, mtk_crtc->cmdq_event, false);
 		mtk_crtc_ddp_config(crtc, cmdq_handle);
 		cmdq_pkt_finalize(cmdq_handle);
+		cmdq_handle->crtc = mtk_crtc;
 		cmdq_pkt_flush_async(cmdq_handle, ddp_cmdq_cb, cmdq_handle);
 	}
 #endif
diff --git a/include/linux/mailbox/mtk-cmdq-mailbox.h b/include/linux/mailbox/mtk-cmdq-mailbox.h
index d5a983d65f05..c06b14ec03e5 100644
--- a/include/linux/mailbox/mtk-cmdq-mailbox.h
+++ b/include/linux/mailbox/mtk-cmdq-mailbox.h
@@ -90,6 +90,7 @@ struct cmdq_pkt {
 	struct cmdq_task_cb	cb;
 	struct cmdq_task_cb	async_cb;
 	void			*cl;
+	void			*crtc;
 };
 
 u8 cmdq_get_shift_pa(struct mbox_chan *chan);
-- 
2.31.1.498.g6c1eba8ee3d-goog