From mboxrd@z Thu Jan 1 00:00:00 1970 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 BE2233783C6; Wed, 17 Jun 2026 18:11:13 +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=1781719875; cv=none; b=XthlnZMs0wBFWRzpHxc+gaWaSEpoWSilNzIR3PML7dzBh2+iowQcvayruYOLj6wjJu8Yu0+ACebjzSFxaTVMtrCvK+Ckv3RLub98axYTjjAJ6B8aXqB9QDCz/2SIHhjgE1eTsKU89tt9coN+cQqrjysSjPSTGX46Lj9HgwtVFJw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781719875; c=relaxed/simple; bh=FABDxv4lHTYBByMlOCppusyHS79PePlZmwh5TvT0nmA=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=gtvXRaq1ZyU+ZbMAxuvG1lFu7+Sd27hcOOckOvO/yH49LaUx+tQSRMxyIl/j8qpyekzV2mjQPsVjIBzIAOY47s8LpuJWx2YohxpOkg+mMKXePNzUvqdu3xz6MxpWut+OYraCnqu0j4uOc/EAE9Rc2v/pKyI0JibFm35cM4X0WeQ= 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=IJnW4yfP; 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="IJnW4yfP" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1781719871; bh=FABDxv4lHTYBByMlOCppusyHS79PePlZmwh5TvT0nmA=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=IJnW4yfP8PHRyvofnrJPJQZzgJoFYrdG9LzwKKtaI3J5HktjnuqO/oJnwGmxlWkeM kgls9GrinQyS+pT090z2FLwqpj1qmsZP+FYHu2jnc3TeMfLXM/ZgCvyoiG1RoC02Lz j8DYVvwJ0bcndp3bY+g4N83kf3CnSdiOqIFCXZ0ShtJ6dzOUxUbPKPjRxXE7xTmv7M iJZBmtrbC6ki+BWnebrsGkitfgLbRsva6x8gx2pjUAX3iqJkCUfJNo712oHk39MIQM k0JxdMHmnc1xWzTbRxXTORH/RYqsnNLh9f1LpL5bZtTHEFKymiWtWAUwFYlBYUIAIB Nta4bU39F0d1g== Received: from [192.168.0.15] (unknown [100.64.0.170]) (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 612B317E0920; Wed, 17 Jun 2026 20:11:10 +0200 (CEST) From: Detlev Casanova Date: Wed, 17 Jun 2026 14:10:56 -0400 Subject: [PATCH v2 1/5] media: v4l2: Add callback for show_fdinfo Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260617-v4l2-add-fdinfo-v2-1-d298e98ce06a@collabora.com> References: <20260617-v4l2-add-fdinfo-v2-0-d298e98ce06a@collabora.com> In-Reply-To: <20260617-v4l2-add-fdinfo-v2-0-d298e98ce06a@collabora.com> To: Mauro Carvalho Chehab , Nicolas Dufresne , Benjamin Gaignard , Philipp Zabel , Ezequiel Garcia , Heiko Stuebner Cc: linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, linux-rockchip@lists.infradead.org, kernel@collabora.com, Detlev Casanova , linux-arm-kernel@lists.infradead.org X-Mailer: b4 0.15.2 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/v4l2-dev.c index 6ce623a1245a..3878fa2ff73e 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 file *filp) return ret; } +/* Override for the show_fdinfo function */ +static void v4l2_show_fdinfo(struct seq_file *m, struct file *filp) +{ + struct video_device *vdev = video_devdata(filp); + + if (vdev->fops->show_fdinfo) + vdev->fops->show_fdinfo(m, filp); +} + static const struct file_operations v4l2_fops = { .owner = THIS_MODULE, .read = v4l2_read, @@ -494,6 +503,7 @@ static const struct file_operations v4l2_fops = { #endif .release = v4l2_release, .poll = v4l2_poll, + .show_fdinfo = v4l2_show_fdinfo, }; /** 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 *); }; /* -- 2.54.0