linux-kernel - [PATCH 3/3] venus: helpers: Lock outside of buffer queue helper

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Date:   Mon, 28 Sep 2020 19:44:31 +0300
From:   Stanimir Varbanov <stanimir.varbanov@...aro.org>
To:     linux-media@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Vikash Garodia <vgarodia@...eaurora.org>,
        Alexandre Courbot <acourbot@...omium.org>,
        Mansur Alisha Shaik <mansur@...eaurora.org>,
        Stanimir Varbanov <stanimir.varbanov@...aro.org>
Subject: [PATCH 3/3] venus: helpers: Lock outside of buffer queue helper

After adding more logic in vdec buf_queue vb2 op it is not
practical to have two lock/unlock for one decoder buf_queue.
So move the instance lock in encoder and decoder vb2 buf_queue
operations.

Signed-off-by: Stanimir Varbanov <stanimir.varbanov@...aro.org>
---
 drivers/media/platform/qcom/venus/helpers.c | 11 +++--------
 drivers/media/platform/qcom/venus/vdec.c    |  3 +--
 drivers/media/platform/qcom/venus/venc.c    | 11 ++++++++++-
 3 files changed, 14 insertions(+), 11 deletions(-)

diff --git a/drivers/media/platform/qcom/venus/helpers.c b/drivers/media/platform/qcom/venus/helpers.c
index 5ca3920237c5..2b6925b6c274 100644
--- a/drivers/media/platform/qcom/venus/helpers.c
+++ b/drivers/media/platform/qcom/venus/helpers.c
@@ -1343,34 +1343,29 @@ void venus_helper_vb2_buf_queue(struct vb2_buffer *vb)
 	struct v4l2_m2m_ctx *m2m_ctx = inst->m2m_ctx;
 	int ret;
 
-	mutex_lock(&inst->lock);
-
 	v4l2_m2m_buf_queue(m2m_ctx, vbuf);
 
 	/* Skip processing queued capture buffers after LAST flag */
 	if (inst->session_type == VIDC_SESSION_TYPE_DEC &&
 	    V4L2_TYPE_IS_CAPTURE(vb->vb2_queue->type) &&
 	    inst->codec_state == VENUS_DEC_STATE_DRC)
-		goto unlock;
+		return;
 
 	cache_payload(inst, vb);
 
 	if (inst->session_type == VIDC_SESSION_TYPE_ENC &&
 	    !(inst->streamon_out && inst->streamon_cap))
-		goto unlock;
+		return;
 
 	if (vb2_start_streaming_called(vb->vb2_queue)) {
 		ret = is_buf_refed(inst, vbuf);
 		if (ret)
-			goto unlock;
+			return;
 
 		ret = session_process_buf(inst, vbuf);
 		if (ret)
 			return_buf_error(inst, vbuf);
 	}
-
-unlock:
-	mutex_unlock(&inst->lock);
 }
 EXPORT_SYMBOL_GPL(venus_helper_vb2_buf_queue);
 
diff --git a/drivers/media/platform/qcom/venus/vdec.c b/drivers/media/platform/qcom/venus/vdec.c
index c006401255dc..044d50f217ce 100644
--- a/drivers/media/platform/qcom/venus/vdec.c
+++ b/drivers/media/platform/qcom/venus/vdec.c
@@ -1237,9 +1237,8 @@ static void vdec_vb2_buf_queue(struct vb2_buffer *vb)
 		return;
 	}
 
-	mutex_unlock(&inst->lock);
-
 	venus_helper_vb2_buf_queue(vb);
+	mutex_unlock(&inst->lock);
 }
 
 static const struct vb2_ops vdec_vb2_ops = {
diff --git a/drivers/media/platform/qcom/venus/venc.c b/drivers/media/platform/qcom/venus/venc.c
index f8b1484e7dcd..f7fb6e362521 100644
--- a/drivers/media/platform/qcom/venus/venc.c
+++ b/drivers/media/platform/qcom/venus/venc.c
@@ -900,13 +900,22 @@ static int venc_start_streaming(struct vb2_queue *q, unsigned int count)
 	return ret;
 }
 
+static void venc_vb2_buf_queue(struct vb2_buffer *vb)
+{
+	struct venus_inst *inst = vb2_get_drv_priv(vb->vb2_queue);
+
+	mutex_lock(&inst->lock);
+	venus_helper_vb2_buf_queue(vb);
+	mutex_unlock(&inst->lock);
+}
+
 static const struct vb2_ops venc_vb2_ops = {
 	.queue_setup = venc_queue_setup,
 	.buf_init = venus_helper_vb2_buf_init,
 	.buf_prepare = venus_helper_vb2_buf_prepare,
 	.start_streaming = venc_start_streaming,
 	.stop_streaming = venus_helper_vb2_stop_streaming,
-	.buf_queue = venus_helper_vb2_buf_queue,
+	.buf_queue = venc_vb2_buf_queue,
 };
 
 static void venc_buf_done(struct venus_inst *inst, unsigned int buf_type,
-- 
2.17.1