linux-kernel - [PATCH v2,1/7] media: mediatek: vcodec: add params to record lat and core lat

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Date:   Mon, 19 Dec 2022 14:43:26 +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 v2,1/7] media: mediatek: vcodec: add params to record lat and core lat_buf count

Using lat_buf to share decoder information between lat and core work
queue, adding params to record the buf count.

Fixes: 365e4ba01df4 ("media: mtk-vcodec: Add work queue for core hardware decode")
Signed-off-by: Yunfei Dong <yunfei.dong@...iatek.com>
---
- remove the mutex for atomic
- for there are only lat and core, no need to use hardware_index for every hardware.
---
 .../platform/mediatek/vcodec/vdec_msg_queue.c | 23 ++++++++++++++++++-
 .../platform/mediatek/vcodec/vdec_msg_queue.h |  6 +++++
 2 files changed, 28 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 dc2004790a47..3f016c87d722 100644
--- a/drivers/media/platform/mediatek/vcodec/vdec_msg_queue.c
+++ b/drivers/media/platform/mediatek/vcodec/vdec_msg_queue.c
@@ -52,6 +52,22 @@ static struct list_head *vdec_get_buf_list(int hardware_index, struct vdec_lat_b
 	}
 }
 
+static void vdec_msg_queue_inc(struct vdec_msg_queue *msg_queue, int hardware_index)
+{
+	if (hardware_index == MTK_VDEC_CORE)
+		atomic_inc(&msg_queue->core_list_cnt);
+	else
+		atomic_inc(&msg_queue->lat_list_cnt);
+}
+
+static void vdec_msg_queue_dec(struct vdec_msg_queue *msg_queue, int hardware_index)
+{
+	if (hardware_index == MTK_VDEC_CORE)
+		atomic_dec(&msg_queue->core_list_cnt);
+	else
+		atomic_dec(&msg_queue->lat_list_cnt);
+}
+
 int vdec_msg_queue_qbuf(struct vdec_msg_queue_ctx *msg_ctx, struct vdec_lat_buf *buf)
 {
 	struct list_head *head;
@@ -66,6 +82,7 @@ int vdec_msg_queue_qbuf(struct vdec_msg_queue_ctx *msg_ctx, struct vdec_lat_buf
 	list_add_tail(head, &msg_ctx->ready_queue);
 	msg_ctx->ready_num++;
 
+	vdec_msg_queue_inc(&buf->ctx->msg_queue, msg_ctx->hardware_index);
 	if (msg_ctx->hardware_index != MTK_VDEC_CORE)
 		wake_up_all(&msg_ctx->ready_to_use);
 	else
@@ -127,6 +144,7 @@ struct vdec_lat_buf *vdec_msg_queue_dqbuf(struct vdec_msg_queue_ctx *msg_ctx)
 		return NULL;
 	}
 	list_del(head);
+	vdec_msg_queue_dec(&buf->ctx->msg_queue, msg_ctx->hardware_index);
 
 	msg_ctx->ready_num--;
 	mtk_v4l2_debug(3, "dqueue buf type:%d addr: 0x%p num: %d",
@@ -241,10 +259,13 @@ int vdec_msg_queue_init(struct vdec_msg_queue *msg_queue,
 
 	vdec_msg_queue_init_ctx(&msg_queue->lat_ctx, MTK_VDEC_LAT0);
 	INIT_WORK(&msg_queue->core_work, vdec_msg_queue_core_work);
+
+	atomic_set(&msg_queue->lat_list_cnt, 0);
+	atomic_set(&msg_queue->core_list_cnt, 0);
+
 	msg_queue->wdma_addr.size =
 		vde_msg_queue_get_trans_size(ctx->picinfo.buf_w,
 					     ctx->picinfo.buf_h);
-
 	err = mtk_vcodec_mem_alloc(ctx, &msg_queue->wdma_addr);
 	if (err) {
 		mtk_v4l2_err("failed to allocate wdma_addr buf");
diff --git a/drivers/media/platform/mediatek/vcodec/vdec_msg_queue.h b/drivers/media/platform/mediatek/vcodec/vdec_msg_queue.h
index c43d427f5f54..b1aa5572ba49 100644
--- a/drivers/media/platform/mediatek/vcodec/vdec_msg_queue.h
+++ b/drivers/media/platform/mediatek/vcodec/vdec_msg_queue.h
@@ -72,6 +72,9 @@ struct vdec_lat_buf {
  * @wdma_wptr_addr: ube write point
  * @core_work: core hardware work
  * @lat_ctx: used to store lat buffer list
+ *
+ * @lat_list_cnt: used to record each instance lat list count
+ * @core_list_cnt: used to record each instance core list count
  */
 struct vdec_msg_queue {
 	struct vdec_lat_buf lat_buf[NUM_BUFFER_COUNT];
@@ -82,6 +85,9 @@ struct vdec_msg_queue {
 
 	struct work_struct core_work;
 	struct vdec_msg_queue_ctx lat_ctx;
+
+	atomic_t lat_list_cnt;
+	atomic_t core_list_cnt;
 };
 
 /**
-- 
2.25.1