linux-kernel - [PATCH 5.18 0373/1095] media: amphion: output firmware error message

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Date:   Mon, 15 Aug 2022 19:56:12 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Ming Qian <ming.qian@....com>,
        Hans Verkuil <hverkuil-cisco@...all.nl>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.18 0373/1095] media: amphion: output firmware error message

From: Ming Qian <ming.qian@....com>

[ Upstream commit 89e3f3fb3d9014efa59ed6bb526d5f1a00168452 ]

Firmware may send the error event with some error message,
and it help locate the firmware error,
so output the error message if it exists

Fixes: 61cbf1c1fa6d7 ("media: amphion: implement vpu core communication based on mailbox")
Signed-off-by: Ming Qian <ming.qian@....com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@...all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/media/platform/amphion/vpu_msgs.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/media/platform/amphion/vpu_msgs.c b/drivers/media/platform/amphion/vpu_msgs.c
index 58502c51ddb3..077644bc1d7c 100644
--- a/drivers/media/platform/amphion/vpu_msgs.c
+++ b/drivers/media/platform/amphion/vpu_msgs.c
@@ -150,7 +150,12 @@ static void vpu_session_handle_eos(struct vpu_inst *inst, struct vpu_rpc_event *
 
 static void vpu_session_handle_error(struct vpu_inst *inst, struct vpu_rpc_event *pkt)
 {
-	dev_err(inst->dev, "unsupported stream\n");
+	char *str = (char *)pkt->data;
+
+	if (strlen(str))
+		dev_err(inst->dev, "instance %d firmware error : %s\n", inst->id, str);
+	else
+		dev_err(inst->dev, "instance %d is unsupported stream\n", inst->id);
 	call_void_vop(inst, event_notify, VPU_MSG_ID_UNSUPPORTED, NULL);
 	vpu_v4l2_set_error(inst);
 }
-- 
2.35.1