From patchwork Mon Feb 1 09:36:59 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hans Verkuil X-Patchwork-Id: 374420 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=-18.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham 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 B8F97C4332B for ; Mon, 1 Feb 2021 09:37:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8A9A564EAF for ; Mon, 1 Feb 2021 09:37:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232894AbhBAJhs (ORCPT ); Mon, 1 Feb 2021 04:37:48 -0500 Received: from lb2-smtp-cloud7.xs4all.net ([194.109.24.28]:57635 "EHLO lb2-smtp-cloud7.xs4all.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232890AbhBAJhr (ORCPT ); Mon, 1 Feb 2021 04:37:47 -0500 Received: from cust-b5b5937f ([IPv6:fc0c:c16d:66b8:757f:c639:739b:9d66:799d]) by smtp-cloud7.xs4all.net with ESMTPA id 6VdjlublEefbk6VdnlfvZr; Mon, 01 Feb 2021 10:37:03 +0100 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=xs4all.nl; s=s2; t=1612172223; bh=85XpFs+a2BCZuvt8ezGGmr/FGhvvQibEvXyQ65II7cs=; h=From:To:Subject:Date:Message-Id:MIME-Version:From:Subject; b=TjtQGeb94tR60iPEqP29TcGZPWHPsp4Pzoy4VEHDV4dt8NfA5ux7KWkUlo/CJZy+2 vTvFvSRVHsRLC+cpp1yDHA8UJgf4qwGce5xv9BQ62CEtdmjj+xiZs7r/k/4rmxbPed VQsR3SU/XdFSRhQ135y3WnGC3r7LIgSqFhprWGsdnrvzvx9L3o4AR3DrupIfNxbeD7 UbgWoSGKAzjqfENS9jInc+p5S8WgCqMkr1tOMHc8Q53HKzKUuXCuix8eR+9uDpB+N/ e+tLZ+MGSS8QbD9j1hs4+EEykVuiqeoNuC6H/XS+9Msq/20e8vfCOfnx9348KlS2c3 j8PmbgX32b6Aw== From: Hans Verkuil To: linux-media@vger.kernel.org Cc: Laurent Pinchart , Sakari Ailus , Hans Verkuil Subject: [PATCHv2 2/2] dvbdev: add /sys media_dev attr for dvb devices Date: Mon, 1 Feb 2021 10:36:59 +0100 Message-Id: <20210201093659.2945449-3-hverkuil-cisco@xs4all.nl> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210201093659.2945449-1-hverkuil-cisco@xs4all.nl> References: <20210201093659.2945449-1-hverkuil-cisco@xs4all.nl> MIME-Version: 1.0 X-CMAE-Envelope: MS4xfJDubjhqzPc4SJmxZIbFvxw6EAT4hJ12G3mVbbxZxJq6c14eVSZaoiFEc9KLQdj3elkTi2l9laRPE2p/IkvBPznQcJmLbgYtttNWWyhL6cYDP8/N4yWW kacmTi1cUmMwmwBUNB2uQYTVUMlyVmuoMozCDMe973vwzV0ff5x0bonak+xCXjC7BFnEY2/Wnqj4gfDi1lj7udO6IK/rllTUFDjOPBlz+Ae70wfTccy+5kLE AbcQIrbERLm76QG5i99DcVvG3Ppa0JKF5vW/ijBUumQBqnST6X+d1SBETRRxUuOwdYKsRR4fbZFMwVRZ7vWA3YC+uppijtiYtWDGoPM5rz0= Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Create a media_dev attribute in /sys for each dvb device which contains the media device major and minor number (or is empty if there is no associated media device). It is not created if the CONFIG_MEDIA_CONTROLLER_DVB is not defined. This makes it possible for applications like v4l2-compliance to find the associated media controller of a dvb device. Signed-off-by: Hans Verkuil --- drivers/media/dvb-core/dvbdev.c | 46 +++++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) diff --git a/drivers/media/dvb-core/dvbdev.c b/drivers/media/dvb-core/dvbdev.c index 5ff7bedee247..e63cee1fc331 100644 --- a/drivers/media/dvb-core/dvbdev.c +++ b/drivers/media/dvb-core/dvbdev.c @@ -452,6 +452,49 @@ static int dvb_register_media_device(struct dvb_device *dvbdev, return 0; } +#if defined(CONFIG_MEDIA_CONTROLLER_DVB) +static ssize_t media_dev_show(struct device *cd, + struct device_attribute *attr, char *buf) +{ + struct dvb_device *dvbdev = dev_get_drvdata(cd); + + buf[0] = '\0'; + if (!dvbdev->adapter->mdev) + return 0; + return sprintf(buf, "%u:%u\n", + MAJOR(dvbdev->adapter->mdev->devnode->dev.devt), + MINOR(dvbdev->adapter->mdev->devnode->dev.devt)); +} +static DEVICE_ATTR_RO(media_dev); + +static umode_t dvb_device_attr_is_visible(struct kobject *kobj, + struct attribute *attr, int n) +{ + struct dvb_device *dvbdev = dev_get_drvdata(kobj_to_dev(kobj)); + + if (attr == &dev_attr_media_dev.attr) { + if (!dvbdev->adapter->mdev) + return 0; + } + return attr->mode; +} + +static struct attribute *dvb_device_attrs[] = { + &dev_attr_media_dev.attr, + NULL, +}; + +static const struct attribute_group dvb_device_group = { + .is_visible = dvb_device_attr_is_visible, + .attrs = dvb_device_attrs, +}; + +static const struct attribute_group *dvb_device_groups[] = { + &dvb_device_group, + NULL +}; +#endif + int dvb_register_device(struct dvb_adapter *adap, struct dvb_device **pdvbdev, const struct dvb_device *template, void *priv, enum dvb_device_type type, int demux_sink_pads) @@ -1056,6 +1099,9 @@ static int __init init_dvbdev(void) } dvb_class->dev_uevent = dvb_uevent; dvb_class->devnode = dvb_devnode; +#if defined(CONFIG_MEDIA_CONTROLLER_DVB) + dvb_class->dev_groups = dvb_device_groups; +#endif return 0; error: