From nobody Thu Apr 2 20:14:35 2026 Received: from bali.collaboradmins.com (bali.collaboradmins.com [148.251.105.195]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B705F35DCE8; Thu, 12 Feb 2026 16:24:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=148.251.105.195 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770913453; cv=none; b=kvagbfshFhyz+8x1NbFs51Gywmwb6u20n4C/Zb7S5KSbKEuSTLW/grt+O1QVE/DqhzJkhjkcZHRtcE+IoP3XY8xwQAjW6+oSksSOYPnNirffXcjvKujVTh65DW+sxTmX3xMW0RlNnFLKeQIu9BnAZGRHI8u/OMtbW64EcK4K2Ww= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770913453; c=relaxed/simple; bh=QqdFH7NwWvtYWHLyq+m7eMuRIfxQNi+SYpkiFhBYq0k=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=NLJfHMWw3CNz5EM+cduN00TfIgK9HcDrAJYuHV+GVnPkdz1RCgl7oJsP8+sY471i1YxGgDGn9BvtDDv8JKKSfEfutITVeXkC15i1m9+1zezAaKIhzbYmIHCFVEhvpsjnk6jTMC/f+ELZmiJ9IsrotNGIp4lJm6c3rMWISfSeJ2E= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=collabora.com; spf=pass smtp.mailfrom=collabora.com; dkim=pass (2048-bit key) header.d=collabora.com header.i=@collabora.com header.b=cok2o3Kp; arc=none smtp.client-ip=148.251.105.195 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=collabora.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=collabora.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=collabora.com header.i=@collabora.com header.b="cok2o3Kp" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1770913450; bh=QqdFH7NwWvtYWHLyq+m7eMuRIfxQNi+SYpkiFhBYq0k=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=cok2o3Kp51uFVv6QQ39FMI4NKGjrhEy+cnMLl7ot0lK58VFt+tmroIqj+40Exikk2 FgqoPFHg0rOlBAFxrY6xEJC36RaWyJme7Q73SbtfOB2yjk9IvYEsxVE29mFu9O/fk0 FC1zbEuT1MalSrHk5/RnGout1FWR955jxNALOtfRIbm9uVwO2ETJ3fAeQmE6QQjIvh CXdLlHjCN2f2FLmpbr7w9CeC5NZW2L+YmNlNqQstw4kthTi522jzvDhfgW9KtRD0bB Ym0H1KUZeNNb546vikIyZCfAva7KPcdYNEPS9SFZWIE24LTyMccW4rBg+cMR6DBG0u odbtFrThFdERw== Received: from trenzalore (modemcable014.2-22-96.mc.videotron.ca [96.22.2.14]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: detlev) by bali.collaboradmins.com (Postfix) with ESMTPSA id 2B6DE17E1144; Thu, 12 Feb 2026 17:24:07 +0100 (CET) From: Detlev Casanova To: linux-kernel@vger.kernel.org Cc: Nicolas Dufresne , Benjamin Gaignard , Philipp Zabel , Mauro Carvalho Chehab , Heiko Stuebner , Daniel Almeida , Steven Rostedt , Masami Hiramatsu , Mathieu Desnoyers , Hans Verkuil , Laurent Pinchart , Ricardo Ribalda , Yunke Cao , Detlev Casanova , Sakari Ailus , Pavan Bobba , James Cowgill , Ma Ke , Jacopo Mondi , Daniel Scally , linux-media@vger.kernel.org, linux-rockchip@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-trace-kernel@vger.kernel.org, kernel@collabora.com Subject: [PATCH 10/11] media: v4l2: Add callback for show_fdinfo Date: Thu, 12 Feb 2026 11:23:27 -0500 Message-ID: <20260212162328.192217-11-detlev.casanova@collabora.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260212162328.192217-1-detlev.casanova@collabora.com> References: <20260212162328.192217-1-detlev.casanova@collabora.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Allow v4l2 drivers to add information in the fdinfo file matching the opened /dev/videoX file. Signed-off-by: Detlev Casanova --- drivers/media/v4l2-core/v4l2-dev.c | 10 ++++++++++ include/media/v4l2-dev.h | 1 + 2 files changed, 11 insertions(+) diff --git a/drivers/media/v4l2-core/v4l2-dev.c b/drivers/media/v4l2-core/v= 4l2-dev.c index 10a126e50c1c..29c04f5f4c59 100644 --- a/drivers/media/v4l2-core/v4l2-dev.c +++ b/drivers/media/v4l2-core/v4l2-dev.c @@ -481,6 +481,15 @@ static int v4l2_release(struct inode *inode, struct fi= le *filp) return ret; } =20 +/* Override for the show_fdinfo function */ +static void v4l2_show_fdinfo(struct seq_file *m, struct file *filp) +{ + struct video_device *vdev =3D video_devdata(filp); + + if (vdev->fops->show_fdinfo) + vdev->fops->show_fdinfo(m, filp); +} + static const struct file_operations v4l2_fops =3D { .owner =3D THIS_MODULE, .read =3D v4l2_read, @@ -494,6 +503,7 @@ static const struct file_operations v4l2_fops =3D { #endif .release =3D v4l2_release, .poll =3D v4l2_poll, + .show_fdinfo =3D v4l2_show_fdinfo, }; =20 /** diff --git a/include/media/v4l2-dev.h b/include/media/v4l2-dev.h index 2e0f6d2e6a78..1635ab186f21 100644 --- a/include/media/v4l2-dev.h +++ b/include/media/v4l2-dev.h @@ -212,6 +212,7 @@ struct v4l2_file_operations { int (*mmap) (struct file *, struct vm_area_struct *); int (*open) (struct file *); int (*release) (struct file *); + void (*show_fdinfo)(struct seq_file *, struct file *); }; =20 /* --=20 2.53.0