From: Sowjanya Komatineni <skomatineni@nvidia.com>
To: <skomatineni@nvidia.com>, <thierry.reding@gmail.com>,
<jonathanh@nvidia.com>, <hverkuil@xs4all.nl>,
<sakari.ailus@iki.fi>, <robh+dt@kernel.org>
Cc: <mchehab@kernel.org>, <linux-media@vger.kernel.org>,
<linux-tegra@vger.kernel.org>, <devicetree@vger.kernel.org>,
<linux-kernel@vger.kernel.org>
Subject: [PATCH v4 09/13] media: tegra-video: Implement V4L2 device notify callback
Date: Fri, 11 Dec 2020 09:02:38 -0800 [thread overview]
Message-ID: <1607706162-1548-10-git-send-email-skomatineni@nvidia.com> (raw)
In-Reply-To: <1607706162-1548-1-git-send-email-skomatineni@nvidia.com>
Implement V4L2 device notify callback to handle
V4L2_EVENT_SOURCE_CHANGE event from subdevices.
HDMI-to-CSI bridge drivers trigger V4L2_EVENT_SOURCE_CHANGE when
source DV timing changes are detected or when HDMI hotplug happens.
Runtime source parameter changes during active streaming is not
allowed and Tegra video driver calls vb2_queue_error to signal a
fatal error if a notification of this event happens during an active
streaming.
Signed-off-by: Sowjanya Komatineni <skomatineni@nvidia.com>
---
drivers/staging/media/tegra-video/vi.c | 3 +++
drivers/staging/media/tegra-video/video.c | 18 ++++++++++++++++++
2 files changed, 21 insertions(+)
diff --git a/drivers/staging/media/tegra-video/vi.c b/drivers/staging/media/tegra-video/vi.c
index 0a85e52..d42a218 100644
--- a/drivers/staging/media/tegra-video/vi.c
+++ b/drivers/staging/media/tegra-video/vi.c
@@ -1636,6 +1636,9 @@ static int tegra_vi_graph_notify_complete(struct v4l2_async_notifier *notifier)
v4l2_set_subdev_hostdata(subdev, chan);
+ subdev = tegra_channel_get_remote_source_subdev(chan);
+ v4l2_set_subdev_hostdata(subdev, chan);
+
return 0;
unregister_video:
diff --git a/drivers/staging/media/tegra-video/video.c b/drivers/staging/media/tegra-video/video.c
index e50bd70..d966b31 100644
--- a/drivers/staging/media/tegra-video/video.c
+++ b/drivers/staging/media/tegra-video/video.c
@@ -7,6 +7,8 @@
#include <linux/module.h>
#include <linux/platform_device.h>
+#include <media/v4l2-event.h>
+
#include "video.h"
static void tegra_v4l2_dev_release(struct v4l2_device *v4l2_dev)
@@ -24,6 +26,21 @@ static void tegra_v4l2_dev_release(struct v4l2_device *v4l2_dev)
kfree(vid);
}
+static void tegra_v4l2_dev_notify(struct v4l2_subdev *sd,
+ unsigned int notification, void *arg)
+{
+ struct tegra_vi_channel *chan;
+ const struct v4l2_event *ev = arg;
+
+ if (notification != V4L2_DEVICE_NOTIFY_EVENT)
+ return;
+
+ chan = v4l2_get_subdev_hostdata(sd);
+ v4l2_event_queue(&chan->video, arg);
+ if (ev->type == V4L2_EVENT_SOURCE_CHANGE && vb2_is_streaming(&chan->queue))
+ vb2_queue_error(&chan->queue);
+}
+
static int host1x_video_probe(struct host1x_device *dev)
{
struct tegra_video_device *vid;
@@ -49,6 +66,7 @@ static int host1x_video_probe(struct host1x_device *dev)
vid->v4l2_dev.mdev = &vid->media_dev;
vid->v4l2_dev.release = tegra_v4l2_dev_release;
+ vid->v4l2_dev.notify = tegra_v4l2_dev_notify;
ret = v4l2_device_register(&dev->dev, &vid->v4l2_dev);
if (ret < 0) {
dev_err(&dev->dev,
--
2.7.4
next prev parent reply other threads:[~2020-12-11 18:42 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-11 17:02 [PATCH v4 00/13] tegra-video: Add support for capturing from HDMI-to-CSI bridge Sowjanya Komatineni
2020-12-11 17:02 ` [PATCH v4 01/13] media: tegra-video: Use zero crop settings if subdev has no get_selection Sowjanya Komatineni
2020-12-11 17:02 ` [PATCH v4 02/13] media: tegra-video: Enable VI pixel transform for YUV and RGB formats Sowjanya Komatineni
2020-12-11 17:02 ` [PATCH v4 03/13] media: tegra-video: Fix V4L2 pixel format RGB and YUV Sowjanya Komatineni
2020-12-11 17:02 ` [PATCH v4 04/13] media: tegra-video: Add support for V4L2_PIX_FMT_NV16 Sowjanya Komatineni
2020-12-11 17:02 ` [PATCH v4 05/13] media: tegra-video: Add DV timing support Sowjanya Komatineni
2020-12-11 17:02 ` [PATCH v4 06/13] media: tegra-video: Add support for EDID ioctl ops Sowjanya Komatineni
2020-12-11 17:02 ` [PATCH v4 07/13] media: tegra-video: Add support for VIDIOC_LOG_STATUS ioctl Sowjanya Komatineni
2020-12-11 17:02 ` [PATCH v4 08/13] media: tegra-video: Add support for V4L2_EVENT_SOURCE_CHANGE Sowjanya Komatineni
2020-12-11 17:02 ` Sowjanya Komatineni [this message]
2020-12-11 17:02 ` [PATCH v4 10/13] media: v4l2-fwnode: Update V4L2_FWNODE_CSI2_MAX_DATA_LANES to 8 Sowjanya Komatineni
2020-12-11 17:02 ` [PATCH v4 11/13] dt-bindings: tegra: Update csi data-lanes to maximum 8 lanes Sowjanya Komatineni
2020-12-11 17:02 ` [PATCH v4 12/13] media: tegra-video: Add support for x8 captures with gang ports Sowjanya Komatineni
2020-12-11 17:02 ` [PATCH v4 13/13] media: tegra-video: Add custom V4L2 control V4L2_CID_TEGRA_SYNCPT_TIMEOUT_RETRY Sowjanya Komatineni
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=1607706162-1548-10-git-send-email-skomatineni@nvidia.com \
--to=skomatineni@nvidia.com \
--cc=devicetree@vger.kernel.org \
--cc=hverkuil@xs4all.nl \
--cc=jonathanh@nvidia.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-media@vger.kernel.org \
--cc=linux-tegra@vger.kernel.org \
--cc=mchehab@kernel.org \
--cc=robh+dt@kernel.org \
--cc=sakari.ailus@iki.fi \
--cc=thierry.reding@gmail.com \
/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;
as well as URLs for NNTP newsgroup(s).