From patchwork Tue Oct 27 03:19:22 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sowjanya Komatineni X-Patchwork-Id: 286072 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3A648C4363A for ; Tue, 27 Oct 2020 03:20:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E248B20872 for ; Tue, 27 Oct 2020 03:20:45 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=nvidia.com header.i=@nvidia.com header.b="YgnaC/R+" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2504832AbgJ0DUn (ORCPT ); Mon, 26 Oct 2020 23:20:43 -0400 Received: from hqnvemgate24.nvidia.com ([216.228.121.143]:18928 "EHLO hqnvemgate24.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2504583AbgJ0DTc (ORCPT ); Mon, 26 Oct 2020 23:19:32 -0400 Received: from hqmail.nvidia.com (Not Verified[216.228.121.13]) by hqnvemgate24.nvidia.com (using TLS: TLSv1.2, AES256-SHA) id ; Mon, 26 Oct 2020 20:19:38 -0700 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; Tue, 27 Oct 2020 03:19:31 +0000 Received: from skomatineni-linux.nvidia.com (172.20.13.39) by mail.nvidia.com (172.20.187.15) with Microsoft SMTP Server id 15.0.1473.3 via Frontend Transport; Tue, 27 Oct 2020 03:19:30 +0000 From: Sowjanya Komatineni To: , , , CC: , , , Subject: [PATCH v2 09/10] media: tegra-video: Implement V4L2 device notify callback Date: Mon, 26 Oct 2020 20:19:22 -0700 Message-ID: <1603768763-25590-10-git-send-email-skomatineni@nvidia.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1603768763-25590-1-git-send-email-skomatineni@nvidia.com> References: <1603768763-25590-1-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=1603768778; bh=xWtjeqZACAKCgSw2RHdrYwyQIBNwajqC+8SWI/tdbs0=; h=From:To:CC:Subject:Date:Message-ID:X-Mailer:In-Reply-To: References:X-NVConfidentiality:MIME-Version:Content-Type; b=YgnaC/R+07E1WDGY25IESREdCQuRe4naJtX6MQCJuo0lj89OK1OJfzG7sZN3Mr0/1 7ukxL6jhGemgW9/+j5Q5c4Ya75rcFnCOgzM+73oxH+E/UsOerTl3ow/CtuBTdBVkFG AXwGRQVTdE1KVQW974qkJ1z10mardt069K48SLChVSU0IG94BH2Hc0/zajTynvMLHz tAcKQ8BhuAmb29MH/XRccZ05Pnc6aD4hGBGqPDchraQuhuqNgURk7eoT7gzwmZtJ1B Bs4gHwfba997dz2oESJwkol4h1vjH756SBXE3YZc7HdyXzfvYRBU0eJQMfVEdXDF89 lJ+/wBUgQ5Tlg== Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org 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 28c06a9..e866f7d 100644 --- a/drivers/staging/media/tegra-video/vi.c +++ b/drivers/staging/media/tegra-video/vi.c @@ -1634,6 +1634,9 @@ 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,