From patchwork Tue Sep 22 17:19:33 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shuah Khan X-Patchwork-Id: 7241881 Return-Path: X-Original-To: patchwork-linux-media@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id A7DFFBEEC1 for ; Tue, 22 Sep 2015 17:29:37 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 6B139209C3 for ; Tue, 22 Sep 2015 17:29:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D79F2209EA for ; Tue, 22 Sep 2015 17:29:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758705AbbIVR3R (ORCPT ); Tue, 22 Sep 2015 13:29:17 -0400 Received: from resqmta-po-11v.sys.comcast.net ([96.114.154.170]:49591 "EHLO resqmta-po-11v.sys.comcast.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758534AbbIVR2F (ORCPT ); Tue, 22 Sep 2015 13:28:05 -0400 Received: from resomta-po-02v.sys.comcast.net ([96.114.154.226]) by resqmta-po-11v.sys.comcast.net with comcast id LHKw1r0084tLnxL01HKxpL; Tue, 22 Sep 2015 17:19:57 +0000 Received: from mail.gonehiking.org ([73.181.52.62]) by resomta-po-02v.sys.comcast.net with comcast id LHKv1r0051LXgTt01HKvHQ; Tue, 22 Sep 2015 17:19:56 +0000 Received: from lorien.internal (lorien-wl.internal [192.168.1.40]) by mail.gonehiking.org (Postfix) with ESMTP id EE85BA153E; Tue, 22 Sep 2015 11:19:54 -0600 (MDT) From: Shuah Khan To: mchehab@osg.samsung.com, hans.verkuil@cisco.com, laurent.pinchart@ideasonboard.com, sakari.ailus@linux.intel.com, tiwai@suse.de, pawel@osciak.com, m.szyprowski@samsung.com, kyungmin.park@samsung.com, perex@perex.cz, stefanr@s5r6.in-berlin.de, crope@iki.fi, dan.carpenter@oracle.com, tskd08@gmail.com, ruchandani.tina@gmail.com, arnd@arndb.de, chehabrafael@gmail.com, prabhakar.csengg@gmail.com, Julia.Lawall@lip6.fr, elfring@users.sourceforge.net, ricardo.ribalda@gmail.com, chris.j.arges@canonical.com, pierre-louis.bossart@linux.intel.com, gtmkramer@xs4all.nl, clemens@ladisch.de, misterpib@gmail.com, takamichiho@gmail.com, pmatilai@laiskiainen.org, damien@zamaudio.com, daniel@zonque.org, vladcatoi@gmail.com, normalperson@yhbt.net, joe@oampo.co.uk, bugzilla.frnkcg@spamgourmet.com, jussi@sonarnerd.net Cc: Shuah Khan , linux-media@vger.kernel.org, alsa-devel@alsa-project.org Subject: [PATCH v3 14/21] media: dvb-frontend invoke enable/disable_source handlers Date: Tue, 22 Sep 2015 11:19:33 -0600 Message-Id: <96ac266ed092526d77d4638d84326e639c5f5a7c.1442937669.git.shuahkh@osg.samsung.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: References: In-Reply-To: References: DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=comcast.net; s=q20140121; t=1442942397; bh=pepJg/sfgj8Aw5wHiK+0fpMMNL0stHjNVPRjBv1DF4U=; h=Received:Received:Received:From:To:Subject:Date:Message-Id; b=SyhQoDq4r4u6cZsuOLQJqn4HrgAcgfNp5I7lxxkcpKwVYU4ceULMl+5XkKvrhnzGR zzVtUopPJbQcvch3kXqiU68h6ZQLItcgGuvPs77uS+/UVEJ3Qtc98qfiaiAMptRK9w coaBsJIpmVvVSE5mGMmL6OKQcrsqXO7uAtWv+ipE44kumO8bPDtWmR67D/KpGUtpgj HYC2QZBpfiEC92BT7qGTzl1Ajn4EUKNiP6ihN40QLAhnrLFq3umv1eY9SeLgcadf1Q gx05gmL0ScAO0Ks1eBXPytGG6ixFyEXkfuvBW3xQSfzYm3loqkQsagYjzTrYkjDp+J YcFFxzukVCB1w== Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-Spam-Status: No, score=-6.8 required=5.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_HI,RP_MATCHES_RCVD,T_DKIM_INVALID,UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Checking for tuner availability from frontend thread start disrupts video stream. Change to check for tuner and start pipeline from frontend open instead and stop pipeline from frontend release. In addition, make a change to invoke enable_source and disable_source handlers to check for tuner availability. The enable_source handler finds tuner entity connected to the decoder and check is it is available or busy. If tuner is available, link is activated and pipeline is started. The disable_source handler to deactivate and stop the pipeline. dvb_enable_media_tuner() is removed as it is no longer necessary with dvb invoking enable_source and disable_source handlers. pipe_start_entity field is removed and pipe field is moved to dvb_frontend from dvb_frontend_private. Signed-off-by: Shuah Khan --- drivers/media/dvb-core/dvb_frontend.c | 135 ++++------------------------------ drivers/media/dvb-core/dvb_frontend.h | 3 + 2 files changed, 18 insertions(+), 120 deletions(-) diff --git a/drivers/media/dvb-core/dvb_frontend.c b/drivers/media/dvb-core/dvb_frontend.c index 842b9c8..c06dd61 100644 --- a/drivers/media/dvb-core/dvb_frontend.c +++ b/drivers/media/dvb-core/dvb_frontend.c @@ -132,11 +132,6 @@ struct dvb_frontend_private { int quality; unsigned int check_wrapped; enum dvbfe_search algo_status; - -#if defined(CONFIG_MEDIA_CONTROLLER_DVB) - struct media_pipeline pipe; - struct media_entity *pipe_start_entity; -#endif }; static void dvb_frontend_wakeup(struct dvb_frontend *fe); @@ -597,107 +592,12 @@ static void dvb_frontend_wakeup(struct dvb_frontend *fe) wake_up_interruptible(&fepriv->wait_queue); } -/** - * dvb_enable_media_tuner() - tries to enable the DVB tuner - * - * @fe: struct dvb_frontend pointer - * - * This function ensures that just one media tuner is enabled for a given - * frontend. It has two different behaviors: - * - For trivial devices with just one tuner: - * it just enables the existing tuner->fe link - * - For devices with more than one tuner: - * It is up to the driver to implement the logic that will enable one tuner - * and disable the other ones. However, if more than one tuner is enabled for - * the same frontend, it will print an error message and return -EINVAL. - * - * At return, it will return the error code returned by media_entity_setup_link, - * or 0 if everything is OK, if no tuner is linked to the frontend or if the - * mdev is NULL. - */ -#ifdef CONFIG_MEDIA_CONTROLLER_DVB -static int dvb_enable_media_tuner(struct dvb_frontend *fe) -{ - struct dvb_frontend_private *fepriv = fe->frontend_priv; - struct dvb_adapter *adapter = fe->dvb; - struct media_device *mdev = adapter->mdev; - struct media_entity *entity, *source; - struct media_link *link, *found_link = NULL; - int i, ret, n_links = 0, active_links = 0; - - fepriv->pipe_start_entity = NULL; - - if (!mdev) - return 0; - - entity = fepriv->dvbdev->entity; - fepriv->pipe_start_entity = entity; - - for (i = 0; i < entity->num_links; i++) { - link = &entity->links[i]; - if (link->sink->entity == entity) { - found_link = link; - n_links++; - if (link->flags & MEDIA_LNK_FL_ENABLED) - active_links++; - } - } - - if (!n_links || active_links == 1 || !found_link) - return 0; - - /* - * If a frontend has more than one tuner linked, it is up to the driver - * to select with one will be the active one, as the frontend core can't - * guess. If the driver doesn't do that, it is a bug. - */ - if (n_links > 1 && active_links != 1) { - dev_err(fe->dvb->device, - "WARNING: there are %d active links among %d tuners. This is a driver's bug!\n", - active_links, n_links); - return -EINVAL; - } - - source = found_link->source->entity; - fepriv->pipe_start_entity = source; - for (i = 0; i < source->num_links; i++) { - struct media_entity *sink; - int flags = 0; - - link = &source->links[i]; - sink = link->sink->entity; - - if (sink == entity) - flags = MEDIA_LNK_FL_ENABLED; - - ret = media_entity_setup_link(link, flags); - if (ret) { - dev_err(fe->dvb->device, - "Couldn't change link %s->%s to %s. Error %d\n", - source->name, sink->name, - flags ? "enabled" : "disabled", - ret); - return ret; - } else - dev_dbg(fe->dvb->device, - "link %s->%s was %s\n", - source->name, sink->name, - flags ? "ENABLED" : "disabled"); - } - return 0; -} -#endif - static int dvb_frontend_thread(void *data) { struct dvb_frontend *fe = data; struct dvb_frontend_private *fepriv = fe->frontend_priv; enum fe_status s; enum dvbfe_algo algo; -#ifdef CONFIG_MEDIA_CONTROLLER_DVB - int ret; -#endif - bool re_tune = false; bool semheld = false; @@ -710,20 +610,6 @@ static int dvb_frontend_thread(void *data) fepriv->wakeup = 0; fepriv->reinitialise = 0; -#ifdef CONFIG_MEDIA_CONTROLLER_DVB - ret = dvb_enable_media_tuner(fe); - if (ret) { - /* FIXME: return an error if it fails */ - dev_info(fe->dvb->device, - "proceeding with FE task\n"); - } else if (fepriv->pipe_start_entity) { - ret = media_entity_pipeline_start(fepriv->pipe_start_entity, - &fepriv->pipe); - if (ret) - return ret; - } -#endif - dvb_frontend_init(fe); set_freezable(); @@ -833,12 +719,6 @@ restart: } } -#ifdef CONFIG_MEDIA_CONTROLLER_DVB - if (fepriv->pipe_start_entity) - media_entity_pipeline_stop(fepriv->pipe_start_entity); - fepriv->pipe_start_entity = NULL; -#endif - if (dvb_powerdown_on_sleep) { if (fe->ops.set_voltage) fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF); @@ -2616,6 +2496,17 @@ static int dvb_frontend_open(struct inode *inode, struct file *file) fepriv->tone = -1; fepriv->voltage = -1; +#ifdef CONFIG_MEDIA_CONTROLLER_DVB + if (fe->dvb->mdev && fe->dvb->mdev->enable_source) { + ret = fe->dvb->mdev->enable_source(dvbdev->entity, + &fe->pipe); + if (ret) { + dev_err(fe->dvb->device, + "Tuner is busy. Error %d\n", ret); + goto err1; + } + } +#endif ret = dvb_frontend_start (fe); if (ret) goto err2; @@ -2659,6 +2550,10 @@ static int dvb_frontend_release(struct inode *inode, struct file *file) wake_up(&fepriv->wait_queue); if (fe->exit != DVB_FE_NO_EXIT) wake_up(&dvbdev->wait_queue); +#ifdef CONFIG_MEDIA_CONTROLLER_DVB + if (fe->dvb->mdev && fe->dvb->mdev->disable_source) + fe->dvb->mdev->disable_source(dvbdev->entity); +#endif if (fe->ops.ts_bus_ctrl) fe->ops.ts_bus_ctrl(fe, 0); } diff --git a/drivers/media/dvb-core/dvb_frontend.h b/drivers/media/dvb-core/dvb_frontend.h index 4816947..03d328e 100644 --- a/drivers/media/dvb-core/dvb_frontend.h +++ b/drivers/media/dvb-core/dvb_frontend.h @@ -428,6 +428,9 @@ struct dvb_frontend { int (*callback)(void *adapter_priv, int component, int cmd, int arg); int id; unsigned int exit; +#if defined(CONFIG_MEDIA_CONTROLLER_DVB) + struct media_pipeline pipe; +#endif }; extern int dvb_register_frontend(struct dvb_adapter *dvb,