Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754940AbcCCDiZ (ORCPT ); Wed, 2 Mar 2016 22:38:25 -0500 Received: from mailout.easymail.ca ([64.68.201.169]:46158 "EHLO mailout.easymail.ca" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752980AbcCCDiX (ORCPT ); Wed, 2 Mar 2016 22:38:23 -0500 X-Spam-Flag: NO X-Spam-Score: -3.689 From: Shuah Khan To: mchehab@osg.samsung.com, hans.verkuil@cisco.com, chehabrafael@gmail.com, javier@osg.samsung.com Cc: Shuah Khan , linux-media@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] media: au0828 audio mixer isn't connected to decoder Date: Wed, 2 Mar 2016 20:38:19 -0700 Message-Id: <1456976299-7525-1-git-send-email-shuahkh@osg.samsung.com> X-Mailer: git-send-email 2.5.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3094 Lines: 105 When snd_usb_audio gets probed first, audio mixer doesn't get linked to the decoder. Change au0828_media_graph_notify() to handle the mixer entity getting registered before the decoder. Change au0828_media_device_register() to invoke au0828_media_graph_notify() to connect entites that were created prior to registering the notify handler. Signed-off-by: Shuah Khan Reported-by: Mauro Carvalho Chehab --- Tested by black listing au0828 to force snd_usb_audio to load first and then modprobe au0828. Generated graphs to verify audio graph is connected to the au0828 graph. drivers/media/usb/au0828/au0828-core.c | 54 ++++++++++++++++++++++++++++------ 1 file changed, 45 insertions(+), 9 deletions(-) diff --git a/drivers/media/usb/au0828/au0828-core.c b/drivers/media/usb/au0828/au0828-core.c index ca1e5eb..5821de4 100644 --- a/drivers/media/usb/au0828/au0828-core.c +++ b/drivers/media/usb/au0828/au0828-core.c @@ -211,23 +211,50 @@ static void au0828_media_graph_notify(struct media_entity *new, #ifdef CONFIG_MEDIA_CONTROLLER struct au0828_dev *dev = (struct au0828_dev *) notify_data; int ret; + struct media_entity *entity, *mixer = NULL, *decoder = NULL; - if (!dev->decoder) - return; + if (!new) { + /* + * Called during au0828 probe time to connect + * entites that were created prior to registering + * the notify handler. Find mixer and decoder. + */ + media_device_for_each_entity(entity, dev->media_dev) { + if (entity->function == MEDIA_ENT_F_AUDIO_MIXER) + mixer = entity; + else if (entity->function == MEDIA_ENT_F_ATV_DECODER) + decoder = entity; + } + goto create_link; + } switch (new->function) { case MEDIA_ENT_F_AUDIO_MIXER: - ret = media_create_pad_link(dev->decoder, + mixer = new; + if (dev->decoder) + decoder = dev->decoder; + break; + case MEDIA_ENT_F_ATV_DECODER: + /* In case, Mixer is added first, find mixer and create link */ + media_device_for_each_entity(entity, dev->media_dev) { + if (entity->function == MEDIA_ENT_F_AUDIO_MIXER) + mixer = entity; + } + decoder = new; + break; + default: + break; + } + +create_link: + if (decoder && mixer) { + ret = media_create_pad_link(decoder, AU8522_PAD_AUDIO_OUT, - new, 0, + mixer, 0, MEDIA_LNK_FL_ENABLED); if (ret) dev_err(&dev->usbdev->dev, - "Mixer Pad Link Create Error: %d\n", - ret); - break; - default: - break; + "Mixer Pad Link Create Error: %d\n", ret); } #endif } @@ -447,6 +474,15 @@ static int au0828_media_device_register(struct au0828_dev *dev, "Media Device Register Error: %d\n", ret); return ret; } + } else { + /* + * Call au0828_media_graph_notify() to connect + * audio graph to our graph. In this case, audio + * driver registered the device and there is no + * entity_notify to be called when new entities + * are added. Invoke it now. + */ + au0828_media_graph_notify(NULL, (void *) dev); } /* register entity_notify callback */ dev->entity_notify.notify_data = (void *) dev; -- 2.5.0