linux-kernel - [PATCH v0 5/6] media: chips-media: wave5: Fix hang after seeking

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Message-Id: <20241112021517.121-6-jackson.lee@chipsnmedia.com>
Date: Tue, 12 Nov 2024 11:15:16 +0900
From: "Jackson.lee" <jackson.lee@...psnmedia.com>
To: mchehab@...nel.org,
	nicolas@...fresne.ca,
	sebastian.fricke@...labora.com
Cc: linux-media@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	hverkuil@...all.nl,
	nas.chung@...psnmedia.com,
	lafley.kim@...psnmedia.com,
	b-brnich@...com,
	jackson.lee@...psnmedia.com
Subject: [PATCH v0 5/6] media: chips-media: wave5: Fix hang after seeking

While seeking, driver calls flush command. Before flush command is sent to
VPU, driver should handle display buffer flags and should get all decoded
information from VPU if VCORE is running.

Signed-off-by: Jackson.lee <jackson.lee@...psnmedia.com>
Signed-off-by: Nas Chung <nas.chung@...psnmedia.com>
---
 .../platform/chips-media/wave5/wave5-vpu-dec.c  | 17 ++++++++++++++++-
 .../platform/chips-media/wave5/wave5-vpuapi.c   | 10 ++++++++++
 2 files changed, 26 insertions(+), 1 deletion(-)

diff --git a/drivers/media/platform/chips-media/wave5/wave5-vpu-dec.c b/drivers/media/platform/chips-media/wave5/wave5-vpu-dec.c
index f0db531247ac..51209700b7e8 100644
--- a/drivers/media/platform/chips-media/wave5/wave5-vpu-dec.c
+++ b/drivers/media/platform/chips-media/wave5/wave5-vpu-dec.c
@@ -1431,6 +1431,16 @@ static int streamoff_output(struct vb2_queue *q)
 	int ret;
 	dma_addr_t new_rd_ptr;
 	struct vpu_src_buffer *vpu_buf, *tmp;
+	struct dec_output_info dec_info;
+	unsigned int i;
+
+	for (i = 0; i < v4l2_m2m_num_dst_bufs_ready(m2m_ctx); i++) {
+		ret = wave5_vpu_dec_set_disp_flag(inst, i);
+		if (ret)
+			dev_dbg(inst->dev->dev,
+				"%s: Setting display flag of buf index: %u, fail: %d\n",
+				__func__, i, ret);
+	}
 
 	inst->retry = false;
 	inst->queuing_num = 0;
@@ -1444,6 +1454,11 @@ static int streamoff_output(struct vb2_queue *q)
 		v4l2_m2m_buf_done(buf, VB2_BUF_STATE_ERROR);
 	}
 
+	while (wave5_vpu_dec_get_output_info(inst, &dec_info) == 0) {
+		if (dec_info.index_frame_display >= 0)
+			wave5_vpu_dec_set_disp_flag(inst, dec_info.index_frame_display);
+	}
+
 	ret = wave5_vpu_flush_instance(inst);
 	if (ret)
 		return ret;
@@ -1526,7 +1541,7 @@ static void wave5_vpu_dec_stop_streaming(struct vb2_queue *q)
 			break;
 
 		if (wave5_vpu_dec_get_output_info(inst, &dec_output_info))
-			dev_dbg(inst->dev->dev, "Getting decoding results from fw, fail\n");
+			dev_dbg(inst->dev->dev, "there is no output info\n");
 	}
 
 	v4l2_m2m_update_stop_streaming_state(m2m_ctx, q);
diff --git a/drivers/media/platform/chips-media/wave5/wave5-vpuapi.c b/drivers/media/platform/chips-media/wave5/wave5-vpuapi.c
index a5b1966530c0..8a071dbd70a1 100644
--- a/drivers/media/platform/chips-media/wave5/wave5-vpuapi.c
+++ b/drivers/media/platform/chips-media/wave5/wave5-vpuapi.c
@@ -75,6 +75,16 @@ int wave5_vpu_flush_instance(struct vpu_instance *inst)
 				 inst->type == VPU_INST_TYPE_DEC ? "DECODER" : "ENCODER", inst->id);
 			mutex_unlock(&inst->dev->hw_lock);
 			return -ETIMEDOUT;
+		} else if (ret == -EBUSY) {
+			struct dec_output_info dec_info;
+
+			mutex_unlock(&inst->dev->hw_lock);
+			wave5_vpu_dec_get_output_info(inst, &dec_info);
+			ret = mutex_lock_interruptible(&inst->dev->hw_lock);
+			if (ret)
+				return ret;
+			if (dec_info.index_frame_display > 0)
+				wave5_vpu_dec_set_disp_flag(inst, dec_info.index_frame_display);
 		}
 	} while (ret != 0);
 	mutex_unlock(&inst->dev->hw_lock);
-- 
2.43.0