linux-kernel - [PATCH] media: amphion: ensure the buffer count is not less than min

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Date:   Tue, 22 Mar 2022 16:28:59 +0800
From:   Ming Qian <ming.qian@....com>
To:     mchehab@...nel.org, shawnguo@...nel.org
Cc:     hverkuil-cisco@...all.nl, robh+dt@...nel.org,
        s.hauer@...gutronix.de, kernel@...gutronix.de, festevam@...il.com,
        linux-imx@....com, aisheng.dong@....com,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: [PATCH] media: amphion: ensure the buffer count is not less than min_buffer

the output buffer count should >= min_buffer_out
the capture buffer count should >= min_buffer_cap

Signed-off-by: Ming Qian <ming.qian@....com>
---
 drivers/media/platform/amphion/vpu_v4l2.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/media/platform/amphion/vpu_v4l2.c b/drivers/media/platform/amphion/vpu_v4l2.c
index cbf3315605a9..72a0544f4da3 100644
--- a/drivers/media/platform/amphion/vpu_v4l2.c
+++ b/drivers/media/platform/amphion/vpu_v4l2.c
@@ -355,6 +355,10 @@ static int vpu_vb2_queue_setup(struct vb2_queue *vq,
 		return 0;
 	}
 
+	if (V4L2_TYPE_IS_OUTPUT(vq->type))
+		*buf_count = max_t(unsigned int, *buf_count, inst->min_buffer_out);
+	else
+		*buf_count = max_t(unsigned int, *buf_count, inst->min_buffer_cap);
 	*plane_count = cur_fmt->num_planes;
 	for (i = 0; i < cur_fmt->num_planes; i++)
 		psize[i] = cur_fmt->sizeimage[i];
-- 
2.33.0