From patchwork Thu Aug 22 15:35:26 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Laurent Pinchart X-Patchwork-Id: 20995 Return-Path: X-Original-To: parsemail@patchwork.libcamera.org Delivered-To: parsemail@patchwork.libcamera.org Received: from lancelot.ideasonboard.com (lancelot.ideasonboard.com [92.243.16.209]) by patchwork.libcamera.org (Postfix) with ESMTPS id AC093C323E for ; Thu, 22 Aug 2024 15:35:48 +0000 (UTC) Received: from lancelot.ideasonboard.com (localhost [IPv6:::1]) by lancelot.ideasonboard.com (Postfix) with ESMTP id 225F7633E4; Thu, 22 Aug 2024 17:35:48 +0200 (CEST) Authentication-Results: lancelot.ideasonboard.com; dkim=pass (1024-bit key; unprotected) header.d=ideasonboard.com header.i=@ideasonboard.com header.b="C5Y6LwFU"; dkim-atps=neutral Received: from perceval.ideasonboard.com (perceval.ideasonboard.com [213.167.242.64]) by lancelot.ideasonboard.com (Postfix) with ESMTPS id 36C56633D4 for ; Thu, 22 Aug 2024 17:35:39 +0200 (CEST) Received: from pendragon.ideasonboard.com (81-175-209-231.bb.dnainternet.fi [81.175.209.231]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 9AAA6124E; Thu, 22 Aug 2024 17:34:35 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1724340875; bh=p/Vm87vlP9XYuQzQ5C0tpdtZ2+oVHTKxRgJwzH0dUr8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=C5Y6LwFU1u1StjdmNVaZltQmP14CgULLXc74z7wuLGgn/aV4yp5+cLLQSO3uImXuJ gu47UuKs40s/z7OuHVsjJCzFAKTls1Fyr4/XS4keOIMqUNMsOGZ0P1wMyUM1D7aWDc B29+Gm/+b+ZBGkHnv/eKLi4Avu/OUKBgVAWjE9rw= From: Laurent Pinchart To: libcamera-devel@lists.libcamera.org Cc: Chen-Yu Tsai , Eugen Hristev , Hans Verkuil , Jacopo Mondi , Kieran Bingham , Maxime Ripard , Sakari Ailus , Tomi Valkeinen , linux-renesas-soc@vger.kernel.org, linux-sunxi@lists.linux.dev Subject: [PATCH v2 6/7] media: renesas: vsp1: Implement .link_validate() for video devices Date: Thu, 22 Aug 2024 18:35:26 +0300 Message-ID: <20240822153527.25320-7-laurent.pinchart+renesas@ideasonboard.com> X-Mailer: git-send-email 2.44.2 In-Reply-To: <20240822153527.25320-1-laurent.pinchart+renesas@ideasonboard.com> References: <20240822153527.25320-1-laurent.pinchart+renesas@ideasonboard.com> MIME-Version: 1.0 X-BeenThere: libcamera-devel@lists.libcamera.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: libcamera-devel-bounces@lists.libcamera.org Sender: "libcamera-devel" The v4l2_subdev_link_validate() helper prints a warning if the .link_validate() operation is not implemented for video devices connected to the subdevs. Implement the operation to silence the warning. Ideally validation of the link between the video device and the subdev should be implemented in that operation. That would however break userspace that does not configure formats on all video devices before starting streaming. While this mode of operation may not be considered valid by the V4L2 API specification (interpretation differ), it is nonetheless supported by the vsp1 driver at the moment and used by at least the vsp1 unit test suite, and possibly other userspace applciations. Removing it would be a regression. Signed-off-by: Laurent Pinchart --- .../media/platform/renesas/vsp1/vsp1_video.c | 22 +++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/drivers/media/platform/renesas/vsp1/vsp1_video.c b/drivers/media/platform/renesas/vsp1/vsp1_video.c index fdb46ec0c872..e728f9f5160e 100644 --- a/drivers/media/platform/renesas/vsp1/vsp1_video.c +++ b/drivers/media/platform/renesas/vsp1/vsp1_video.c @@ -1081,6 +1081,27 @@ static const struct v4l2_file_operations vsp1_video_fops = { .mmap = vb2_fop_mmap, }; +/* ----------------------------------------------------------------------------- + * Media entity operations + */ + +static int vsp1_video_link_validate(struct media_link *link) +{ + /* + * Ideally, link validation should be implemented here instead of + * calling vsp1_video_verify_format() in vsp1_video_streamon() + * manually. That would however break userspace that start one video + * device before configures formats on other video devices in the + * pipeline. This operation is just a no-op to silence the warnings + * from v4l2_subdev_link_validate(). + */ + return 0; +} + +static const struct media_entity_operations vsp1_video_media_ops = { + .link_validate = vsp1_video_link_validate, +}; + /* ----------------------------------------------------------------------------- * Suspend and Resume */ @@ -1215,6 +1236,7 @@ struct vsp1_video *vsp1_video_create(struct vsp1_device *vsp1, /* ... and the video node... */ video->video.v4l2_dev = &video->vsp1->v4l2_dev; + video->video.entity.ops = &vsp1_video_media_ops; video->video.fops = &vsp1_video_fops; snprintf(video->video.name, sizeof(video->video.name), "%s %s", rwpf->entity.subdev.name, direction);