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From:   Benjamin Gaignard <benjamin.gaignard@collabora.com>
To:     mchehab@kernel.org, tfiga@chromium.org, m.szyprowski@samsung.com,
        ming.qian@nxp.com, ezequiel@vanguardiasur.com.ar,
        p.zabel@pengutronix.de, gregkh@linuxfoundation.org,
        hverkuil-cisco@xs4all.nl, nicolas.dufresne@collabora.com
Cc:     linux-media@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org,
        linux-mediatek@lists.infradead.org, linux-arm-msm@vger.kernel.org,
        linux-rockchip@lists.infradead.org, linux-staging@lists.linux.dev,
        kernel@collabora.com,
        Benjamin Gaignard <benjamin.gaignard@collabora.com>,
        Andy Walls <awalls@md.metrocast.net>
Subject: [PATCH v11 22/56] media: pci: cx18: Set correct value to min_buffers_needed field
Date:   Thu, 12 Oct 2023 13:46:08 +0200
Message-Id: <20231012114642.19040-23-benjamin.gaignard@collabora.com>
In-Reply-To: <20231012114642.19040-1-benjamin.gaignard@collabora.com>
References: <20231012114642.19040-1-benjamin.gaignard@collabora.com>
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Set queue min_buffers_needed field to 3 and remove the useless
check.

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com>
CC: Andy Walls <awalls@md.metrocast.net>
---
 drivers/media/pci/cx18/cx18-streams.c | 13 +++++--------
 1 file changed, 5 insertions(+), 8 deletions(-)

diff --git a/drivers/media/pci/cx18/cx18-streams.c b/drivers/media/pci/cx18/cx18-streams.c
index 597472754c4c..6ed2c9fb882c 100644
--- a/drivers/media/pci/cx18/cx18-streams.c
+++ b/drivers/media/pci/cx18/cx18-streams.c
@@ -117,13 +117,6 @@ static int cx18_queue_setup(struct vb2_queue *vq,
 	else
 		szimage = cx->cxhdl.height * 720 * 2;
 
-	/*
-	 * Let's request at least three buffers: two for the
-	 * DMA engine and one for userspace.
-	 */
-	if (vq->num_buffers + *nbuffers < 3)
-		*nbuffers = 3 - vq->num_buffers;
-
 	if (*nplanes) {
 		if (*nplanes != 1 || sizes[0] < szimage)
 			return -EINVAL;
@@ -286,7 +279,11 @@ static int cx18_stream_init(struct cx18 *cx, int type)
 		s->vidq.ops = &cx18_vb2_qops;
 		s->vidq.mem_ops = &vb2_vmalloc_memops;
 		s->vidq.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
-		s->vidq.min_buffers_needed = 2;
+		/*
+		 * Let's request at least three buffers: two for the
+		 * DMA engine and one for userspace.
+		 */
+		s->vidq.min_buffers_needed = 3;
 		s->vidq.gfp_flags = GFP_DMA32;
 		s->vidq.dev = &cx->pci_dev->dev;
 		s->vidq.lock = &cx->serialize_lock;
-- 
2.39.2