From patchwork Fri Dec 11 17:02:38 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sowjanya Komatineni X-Patchwork-Id: 70001 X-Patchwork-Delegate: hverkuil@xs4all.nl Received: from vger.kernel.org ([23.128.96.18]) by www.linuxtv.org with esmtp (Exim 4.92) (envelope-from ) id 1knls5-00FYRT-5l; Fri, 11 Dec 2020 17:06:21 +0000 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2393569AbgLKRE4 (ORCPT + 1 other); Fri, 11 Dec 2020 12:04:56 -0500 Received: from hqnvemgate26.nvidia.com ([216.228.121.65]:5412 "EHLO hqnvemgate26.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2405403AbgLKREe (ORCPT ); Fri, 11 Dec 2020 12:04:34 -0500 Received: from hqmail.nvidia.com (Not Verified[216.228.121.13]) by hqnvemgate26.nvidia.com (using TLS: TLSv1.2, AES256-SHA) id ; Fri, 11 Dec 2020 09:02:53 -0800 Received: from HQMAIL109.nvidia.com (172.20.187.15) by HQMAIL107.nvidia.com (172.20.187.13) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Fri, 11 Dec 2020 17:02:53 +0000 Received: from skomatineni-linux.nvidia.com (172.20.145.6) by mail.nvidia.com (172.20.187.15) with Microsoft SMTP Server id 15.0.1473.3 via Frontend Transport; Fri, 11 Dec 2020 17:02:52 +0000 From: Sowjanya Komatineni To: , , , , , CC: , , , , Subject: [PATCH v4 09/13] media: tegra-video: Implement V4L2 device notify callback Date: Fri, 11 Dec 2020 09:02:38 -0800 Message-ID: <1607706162-1548-10-git-send-email-skomatineni@nvidia.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1607706162-1548-1-git-send-email-skomatineni@nvidia.com> References: <1607706162-1548-1-git-send-email-skomatineni@nvidia.com> X-NVConfidentiality: public MIME-Version: 1.0 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nvidia.com; s=n1; t=1607706173; bh=ncGsj+Oy+F4Lel7edOJaT66wM9yPnydfWvWB30dUNxo=; h=From:To:CC:Subject:Date:Message-ID:X-Mailer:In-Reply-To: References:X-NVConfidentiality:MIME-Version:Content-Type; b=pRkNbvPBYVQEx/xrYcvJvEkT7V/3iOamjH60r5h3ipSq0E8VSgLA9Zz9AfHnUy4nH djyaqbNHpJ0Xb7feGOoNHi1gLLE6v49yqS0Mtlkn6XZh31qM8aw7hIXtncGprYq3rG igLRQzpPZm7oMP9yulUxd7y1xwENtiPA61zjMXR6bxQxyPOLTiJJIJAEjUCTmMhLSt kZ+zK/tbYL8Yj/4rFL0U1P3X4xXZMyr7/uodULb4yQB+t1qm0Sx6vpohpdZHAqeq9y 24SdrHO0qxixdr8HsmOhxGDFw/6klt4/bCktTGvIOBs3K9/bHhlSBYSHCjqF/LtuT+ QME9b+6OPFybQ== Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-LSpam-Score: -2.5 (--) X-LSpam-Report: No, score=-2.5 required=5.0 tests=BAYES_00=-1.9,DKIMWL_WL_HIGH=0.001,DKIM_SIGNED=0.1,DKIM_VALID=-0.1,DKIM_VALID_AU=-0.1,HEADER_FROM_DIFFERENT_DOMAINS=0.5,MAILING_LIST_MULTI=-1 autolearn=ham autolearn_force=no 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 --- 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 #include +#include + #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,