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>,
Andrzej Pietrasiewicz <andrzej.p@collabora.com>
Subject: [PATCH v15 07/56] media: videobuf2: Add helper to get queue number of buffers
Date: Thu, 9 Nov 2023 17:29:19 +0100 [thread overview]
Message-ID: <20231109163008.179152-8-benjamin.gaignard@collabora.com> (raw)
In-Reply-To: <20231109163008.179152-1-benjamin.gaignard@collabora.com>
In the future a side effect of introducing DELETE_BUFS ioctl is
the create of 'holes' (i.e. unused buffers) in bufs arrays.
To know which entries of the bufs arrays are used a bitmap will
be added in struct vb2_queue. That will also mean that the number
of buffers will be computed given the number of bit set in this bitmap.
To smoothly allow this evolution all drives must stop using
directly num_buffers field from struct vb2_queue.
Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com>
Reviewed-by: Andrzej Pietrasiewicz <andrzej.p@collabora.com>
---
include/media/videobuf2-core.h | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/include/media/videobuf2-core.h b/include/media/videobuf2-core.h
index cd3ff1cd759d..8f9d9e4af5b1 100644
--- a/include/media/videobuf2-core.h
+++ b/include/media/videobuf2-core.h
@@ -1139,6 +1139,15 @@ static inline bool vb2_fileio_is_active(struct vb2_queue *q)
return q->fileio;
}
+/**
+ * vb2_get_num_buffers() - get the number of buffer in a queue
+ * @q: pointer to &struct vb2_queue with videobuf2 queue.
+ */
+static inline unsigned int vb2_get_num_buffers(struct vb2_queue *q)
+{
+ return q->num_buffers;
+}
+
/**
* vb2_is_busy() - return busy status of the queue.
* @q: pointer to &struct vb2_queue with videobuf2 queue.
@@ -1147,7 +1156,7 @@ static inline bool vb2_fileio_is_active(struct vb2_queue *q)
*/
static inline bool vb2_is_busy(struct vb2_queue *q)
{
- return (q->num_buffers > 0);
+ return vb2_get_num_buffers(q) > 0;
}
/**
--
2.39.2
_______________________________________________
Linux-rockchip mailing list
Linux-rockchip@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-rockchip
next prev parent reply other threads:[~2023-11-09 16:33 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-11-09 16:29 [PATCH v15 00/56] Add DELETE_BUF ioctl Benjamin Gaignard
2023-11-09 16:29 ` [PATCH v15 01/56] media: videobuf2: Rename offset parameter Benjamin Gaignard
2023-11-09 16:29 ` [PATCH v15 02/56] media: videobuf2: Rework offset 'cookie' encoding pattern Benjamin Gaignard
2023-11-09 16:29 ` [PATCH v15 03/56] media: videobuf2: Stop spamming kernel log with all queue counter Benjamin Gaignard
2023-11-09 16:29 ` [PATCH v15 04/56] media: videobuf2: Use vb2_buffer instead of index Benjamin Gaignard
2023-11-09 16:29 ` [PATCH v15 05/56] media: videobuf2: Access vb2_queue bufs array through helper functions Benjamin Gaignard
2023-11-09 16:29 ` [PATCH v15 06/56] media: videobuf2: Remove duplicated index vs q->num_buffers check Benjamin Gaignard
2023-11-09 16:29 ` Benjamin Gaignard [this message]
2023-11-09 16:29 ` [PATCH v15 08/56] media: videobuf2: Use vb2_get_num_buffers() helper Benjamin Gaignard
2023-11-09 16:29 ` [PATCH v15 09/56] media: amphion: Use vb2_get_buffer() instead of directly access to buffers array Benjamin Gaignard
2023-11-09 16:29 ` [PATCH v15 10/56] media: amphion: Stop direct calls to queue num_buffers field Benjamin Gaignard
2023-11-09 16:29 ` [PATCH v15 11/56] media: mediatek: jpeg: Use vb2_get_buffer() instead of directly access to buffers array Benjamin Gaignard
2023-11-09 16:29 ` [PATCH v15 12/56] media: mediatek: vdec: Remove useless loop Benjamin Gaignard
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20231109163008.179152-8-benjamin.gaignard@collabora.com \
--to=benjamin.gaignard@collabora.com \
--cc=andrzej.p@collabora.com \
--cc=ezequiel@vanguardiasur.com.ar \
--cc=gregkh@linuxfoundation.org \
--cc=hverkuil-cisco@xs4all.nl \
--cc=kernel@collabora.com \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-arm-msm@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-media@vger.kernel.org \
--cc=linux-mediatek@lists.infradead.org \
--cc=linux-rockchip@lists.infradead.org \
--cc=linux-staging@lists.linux.dev \
--cc=m.szyprowski@samsung.com \
--cc=mchehab@kernel.org \
--cc=ming.qian@nxp.com \
--cc=nicolas.dufresne@collabora.com \
--cc=p.zabel@pengutronix.de \
--cc=tfiga@chromium.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox