linux-kernel - [PATCH 4/5] media: mediatek: vcodec: add core decode done event

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Date:   Sat, 10 Dec 2022 15:32:17 +0800
From:   Yunfei Dong <yunfei.dong@...iatek.com>
To:     Yunfei Dong <yunfei.dong@...iatek.com>,
        Chen-Yu Tsai <wenst@...omium.org>,
        Nicolas Dufresne <nicolas@...fresne.ca>,
        Hans Verkuil <hverkuil-cisco@...all.nl>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Benjamin Gaignard <benjamin.gaignard@...labora.com>,
        Tiffany Lin <tiffany.lin@...iatek.com>
CC:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Hsin-Yi Wang <hsinyi@...omium.org>,
        Fritz Koenig <frkoenig@...omium.org>,
        Daniel Vetter <daniel@...ll.ch>,
        Steve Cho <stevecho@...omium.org>,
        <linux-media@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>,
        <Project_Global_Chrome_Upstream_Group@...iatek.com>
Subject: [PATCH 4/5] media: mediatek: vcodec: add core decode done event

Need to make sure core decode done before current instance is free.

Fixes: 365e4ba01df4 ("media: mtk-vcodec: Add work queue for core hardware decode")
Signed-off-by: Yunfei Dong <yunfei.dong@...iatek.com>
---
 drivers/media/platform/mediatek/vcodec/vdec_msg_queue.c | 4 +++-
 drivers/media/platform/mediatek/vcodec/vdec_msg_queue.h | 2 ++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/media/platform/mediatek/vcodec/vdec_msg_queue.c b/drivers/media/platform/mediatek/vcodec/vdec_msg_queue.c
index 6275536d5063..9bbbd3fa20eb 100644
--- a/drivers/media/platform/mediatek/vcodec/vdec_msg_queue.c
+++ b/drivers/media/platform/mediatek/vcodec/vdec_msg_queue.c
@@ -201,7 +201,7 @@ bool vdec_msg_queue_wait_lat_buf_full(struct vdec_msg_queue *msg_queue)
 	spin_unlock(&core_ctx->ready_lock);
 
 	timeout_jiff = msecs_to_jiffies(1000 * (NUM_BUFFER_COUNT + 2));
-	ret = wait_event_timeout(msg_queue->lat_ctx.ready_to_use,
+	ret = wait_event_timeout(msg_queue->ctx->msg_queue.core_dec_done,
 				 msg_queue->lat_ctx.ready_num == NUM_BUFFER_COUNT,
 				 timeout_jiff);
 	if (ret) {
@@ -262,6 +262,7 @@ static void vdec_msg_queue_core_work(struct work_struct *work)
 	mtk_vcodec_dec_disable_hardware(ctx, MTK_VDEC_CORE);
 	vdec_msg_queue_qbuf(&ctx->msg_queue.lat_ctx, lat_buf);
 
+	wake_up_all(&ctx->msg_queue.core_dec_done);
 	if (atomic_read(&lat_buf->ctx->msg_queue.core_list_cnt)) {
 		mtk_v4l2_debug(3, "re-schedule to decode for core: %d",
 			       dev->msg_queue_core_ctx.ready_num);
@@ -287,6 +288,7 @@ int vdec_msg_queue_init(struct vdec_msg_queue *msg_queue,
 	atomic_set(&msg_queue->lat_list_cnt, 0);
 	atomic_set(&msg_queue->core_list_cnt, 0);
 	mutex_init(&msg_queue->list_cnt_mutex);
+	init_waitqueue_head(&msg_queue->core_dec_done);
 
 	msg_queue->wdma_addr.size =
 		vde_msg_queue_get_trans_size(ctx->picinfo.buf_w,
diff --git a/drivers/media/platform/mediatek/vcodec/vdec_msg_queue.h b/drivers/media/platform/mediatek/vcodec/vdec_msg_queue.h
index 53ad05396c8c..0944b6436fb6 100644
--- a/drivers/media/platform/mediatek/vcodec/vdec_msg_queue.h
+++ b/drivers/media/platform/mediatek/vcodec/vdec_msg_queue.h
@@ -77,6 +77,7 @@ struct vdec_lat_buf {
  * @lat_list_cnt: used to record each instance lat list count
  * @core_list_cnt: used to record each instance core list count
  * @list_cnt_mutex: used to protect list count
+ * @core_dec_done: core work queue decode done event
  */
 struct vdec_msg_queue {
 	struct vdec_lat_buf lat_buf[NUM_BUFFER_COUNT];
@@ -93,6 +94,7 @@ struct vdec_msg_queue {
 	atomic_t core_list_cnt;
 	/* Protects access to lat and core list cnt */
 	struct mutex list_cnt_mutex;
+	wait_queue_head_t core_dec_done;
 };
 
 /**
-- 
2.18.0