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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>
Subject: [PATCH v9 41/53] media: usb: usbtv: Set min_buffers_needed to 2
Date:   Mon,  2 Oct 2023 14:06:05 +0200
Message-Id: <20231002120617.119602-42-benjamin.gaignard@collabora.com>
In-Reply-To: <20231002120617.119602-1-benjamin.gaignard@collabora.com>
References: <20231002120617.119602-1-benjamin.gaignard@collabora.com>
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vb2 queue_setup checks for a minimum number of buffers so set
min_buffers_needed to 2 and remove the useless check in
usbtv_queue_setup().

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com>
---
 drivers/media/usb/usbtv/usbtv-video.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/media/usb/usbtv/usbtv-video.c b/drivers/media/usb/usbtv/usbtv-video.c
index 1e30e05953dc..0e9e860be47f 100644
--- a/drivers/media/usb/usbtv/usbtv-video.c
+++ b/drivers/media/usb/usbtv/usbtv-video.c
@@ -727,8 +727,6 @@ static int usbtv_queue_setup(struct vb2_queue *vq,
 	struct usbtv *usbtv = vb2_get_drv_priv(vq);
 	unsigned size = USBTV_CHUNK * usbtv->n_chunks * 2 * sizeof(u32);
 
-	if (vq->num_buffers + *nbuffers < 2)
-		*nbuffers = 2 - vq->num_buffers;
 	if (*nplanes)
 		return sizes[0] < size ? -EINVAL : 0;
 	*nplanes = 1;
@@ -892,6 +890,7 @@ int usbtv_video_init(struct usbtv *usbtv)
 	/* videobuf2 structure */
 	usbtv->vb2q.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 	usbtv->vb2q.io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ;
+	usbtv->vb2q.min_buffers_needed = 2;
 	usbtv->vb2q.drv_priv = usbtv;
 	usbtv->vb2q.buf_struct_size = sizeof(struct usbtv_buf);
 	usbtv->vb2q.ops = &usbtv_vb2_ops;
-- 
2.39.2