From patchwork Fri Sep 11 22:30:37 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Abhishek Pandit-Subedi X-Patchwork-Id: 11771577 X-Patchwork-Delegate: luiz.dentz@gmail.com Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 8F7EB746 for ; Fri, 11 Sep 2020 22:31:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6E9C822207 for ; Fri, 11 Sep 2020 22:31:08 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="aMZSqJ/l" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725895AbgIKWbD (ORCPT ); Fri, 11 Sep 2020 18:31:03 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43440 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725887AbgIKWax (ORCPT ); Fri, 11 Sep 2020 18:30:53 -0400 Received: from mail-pf1-x442.google.com (mail-pf1-x442.google.com [IPv6:2607:f8b0:4864:20::442]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 658CBC061573 for ; Fri, 11 Sep 2020 15:30:49 -0700 (PDT) Received: by mail-pf1-x442.google.com with SMTP id w7so8384310pfi.4 for ; Fri, 11 Sep 2020 15:30:49 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=bpdlpNcK/8y7A9u/to7Zf4xpQk2+RMyT+URstWuCPjo=; b=aMZSqJ/loMI3q7f+XP+yXBzHFyD2RdL0ud7O5SkGnmVnWmGbayiV9iqEEEd8nhkyMc /nODOytSN3YsPLPH4y1WW4r3Dlx2uKE5swaVzfLoMD61OWAhinMP9c3lAUM8OuL9QfmJ GtuRu0uC0LX5EPDpWjAOWHw1Jm1S4SUh58bF8= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=bpdlpNcK/8y7A9u/to7Zf4xpQk2+RMyT+URstWuCPjo=; b=LZkU+Vk81dHNRXcxIOHq37TXanl6HpZ/7z1wV3HSNx4FDRD6lVcvPeWYVRJscajQ3k EgDl9NlVv/tlo0EOBcTvqtXWdznQwxo3VAqMk6Cl5DvTuuNbb5l4tKxE2SEJo+WAZHrj 7fvrQsCb9dRrER7OF7T6USg63A5BUeeN8A4taNYeW3cqdFid08pEu1QB1/r4WUlMdjbm VOsH8sC+ttv61wXdIRi9Ghiw5a+B2xkXlWz1tFibRlc+Fo7HFdRfKqrcxaJj7JRVjZB7 pZg6Dz6tPPKOpBuv8CLLMJgxsj18vGXZg/VorXLBlIOTLXqTNoX9xQCaHDs82qpXEA3q 1EMQ== X-Gm-Message-State: AOAM5326Iv8eC8WOzO200fi31WkUsLnzjUmnsF8pt896Sq12D8Hbn962 UIUP+ho0Tz07BdSgG7DO76jCYg== X-Google-Smtp-Source: ABdhPJz8yTMI8Y/B3X5nyxyMNzQ8V83GVmsMVhHeB/rmBeuMMUYAi6X9VyzniDiFn5CizznTBfklrg== X-Received: by 2002:a63:6c0a:: with SMTP id h10mr3232681pgc.11.1599863448732; Fri, 11 Sep 2020 15:30:48 -0700 (PDT) Received: from apsdesk.mtv.corp.google.com ([2620:15c:202:1:7220:84ff:fe09:2b94]) by smtp.gmail.com with ESMTPSA id m14sm3123742pfo.202.2020.09.11.15.30.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 11 Sep 2020 15:30:48 -0700 (PDT) From: Abhishek Pandit-Subedi To: luiz.dentz@gmail.com, marcel@holtmann.org Cc: chromeos-bluetooth-upstreaming@chromium.org, linux-bluetooth@vger.kernel.org, Abhishek Pandit-Subedi Subject: [Bluez PATCH v4 4/4] policy: Reconnect audio on controller resume Date: Fri, 11 Sep 2020 15:30:37 -0700 Message-Id: <20200911153010.Bluez.v4.4.I26efd89de3a70af1cd9775d457d0c10f4aafd4cb@changeid> X-Mailer: git-send-email 2.28.0.618.gf4bc123cb7-goog In-Reply-To: <20200911223037.4127188-1-abhishekpandit@chromium.org> References: <20200911223037.4127188-1-abhishekpandit@chromium.org> MIME-Version: 1.0 Sender: linux-bluetooth-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-bluetooth@vger.kernel.org During system suspend, all peer devices are disconnected. On resume, HID devices will reconnect but audio devices stay disconnected. As a quality of life improvement, mark audio devices that were disconnected due to suspend and attempt to reconnect them when the controller resumes (after a delay for better co-existence with Wi-Fi). --- Changes in v4: - Set reconnect timer in disconnect if resume events aren't supported - Only set reconnect timer if adapter matches current notification - Refactor changes in src/adapter to its own commit - Refactor enabling A2DP_SINK_UUID into its own commit Changes in v3: - Refactored resume notification to use btd_adapter_driver - Renamed ReconnectAudioDelay to ResumeDelay and set default to 2 - Added A2DP_SINK_UUID to default reconnect list Changes in v2: - Refactored to use policy instead of connecting directly in adapter plugins/policy.c | 84 ++++++++++++++++++++++++++++++++++++++++-------- src/main.c | 1 + src/main.conf | 9 ++++++ 3 files changed, 81 insertions(+), 13 deletions(-) diff --git a/plugins/policy.c b/plugins/policy.c index c18ca8d1f..6bd389518 100644 --- a/plugins/policy.c +++ b/plugins/policy.c @@ -62,6 +62,7 @@ struct reconnect_data { guint timer; bool active; unsigned int attempt; + bool on_resume; }; static const char *default_reconnect[] = { @@ -76,6 +77,9 @@ static const int default_intervals[] = { 1, 2, 4, 8, 16, 32, 64 }; static int *reconnect_intervals = NULL; static size_t reconnect_intervals_len = 0; +static const int default_resume_delay = 2; +static int resume_delay; + static GSList *reconnects = NULL; static unsigned int service_id = 0; @@ -712,6 +716,9 @@ static gboolean reconnect_timeout(gpointer data) /* Mark the GSource as invalid */ reconnect->timer = 0; + /* Mark any reconnect on resume as handled */ + reconnect->on_resume = false; + err = btd_device_connect_services(reconnect->dev, reconnect->services); if (err < 0) { error("Reconnecting services failed: %s (%d)", @@ -725,14 +732,17 @@ static gboolean reconnect_timeout(gpointer data) return FALSE; } -static void reconnect_set_timer(struct reconnect_data *reconnect) +static void reconnect_set_timer(struct reconnect_data *reconnect, int timeout) { - static int timeout = 0; + static int interval_timeout = 0; reconnect->active = true; if (reconnect->attempt < reconnect_intervals_len) - timeout = reconnect_intervals[reconnect->attempt]; + interval_timeout = reconnect_intervals[reconnect->attempt]; + + if (timeout < 0) + timeout = interval_timeout; DBG("attempt %u/%zu %d seconds", reconnect->attempt + 1, reconnect_attempts, timeout); @@ -744,10 +754,14 @@ static void reconnect_set_timer(struct reconnect_data *reconnect) static void disconnect_cb(struct btd_device *dev, uint8_t reason) { struct reconnect_data *reconnect; + struct btd_service *service; + struct policy_data *data; DBG("reason %u", reason); - if (reason != MGMT_DEV_DISCONN_TIMEOUT) + /* Only attempt reconnect for the following reasons */ + if (reason != MGMT_DEV_DISCONN_TIMEOUT && + reason != MGMT_DEV_DISCONN_LOCAL_HOST_SUSPEND) return; reconnect = reconnect_find(dev); @@ -756,10 +770,47 @@ static void disconnect_cb(struct btd_device *dev, uint8_t reason) reconnect_reset(reconnect); - DBG("Device %s identified for auto-reconnection", - device_get_path(dev)); + DBG("Device %s identified for auto-reconnection", device_get_path(dev)); + + switch(reason) + { + case MGMT_DEV_DISCONN_LOCAL_HOST_SUSPEND: + if (btd_device_get_service(dev, A2DP_SINK_UUID)) { + DBG("%s configured to reconnect on resume", + device_get_path(dev)); - reconnect_set_timer(reconnect); + reconnect->on_resume = true; + + /* If the kernel supports resume events, it is + * preferable to set the reconnect timer there as it is + * a more predictable delay. + */ + if (!has_kernel_features(KERNEL_HAS_RESUME_EVT)) + reconnect_set_timer(reconnect, resume_delay); + } + break; + case MGMT_DEV_DISCONN_TIMEOUT: + reconnect_set_timer(reconnect, -1); + break; + default: + DBG("Developer error. Reason = %d", reason); + break; + } +} + +static void policy_adapter_resume(struct btd_adapter *adapter) +{ + GSList *l; + + /* Check if devices on this adapter need to be reconnected on resume */ + for (l = reconnects; l; l = g_slist_next(l)) { + struct reconnect_data *reconnect = l->data; + + if (reconnect->on_resume && + device_get_adapter(reconnect->dev) == adapter) { + reconnect_set_timer(reconnect, resume_delay); + } + } } static void conn_fail_cb(struct btd_device *dev, uint8_t status) @@ -787,14 +838,15 @@ static void conn_fail_cb(struct btd_device *dev, uint8_t status) return; } - reconnect_set_timer(reconnect); + reconnect_set_timer(reconnect, -1); } static int policy_adapter_probe(struct btd_adapter *adapter) { DBG(""); - btd_adapter_restore_powered(adapter); + if (auto_enable) + btd_adapter_restore_powered(adapter); return 0; } @@ -802,6 +854,7 @@ static int policy_adapter_probe(struct btd_adapter *adapter) static struct btd_adapter_driver policy_driver = { .name = "policy", .probe = policy_adapter_probe, + .resume = policy_adapter_resume, }; static int policy_init(void) @@ -855,14 +908,20 @@ static int policy_init(void) auto_enable = g_key_file_get_boolean(conf, "Policy", "AutoEnable", NULL); + resume_delay = g_key_file_get_integer( + conf, "Policy", "ResumeDelay", &gerr); + + if (gerr) { + g_clear_error(&gerr); + resume_delay = default_resume_delay; + } done: if (reconnect_uuids && reconnect_uuids[0] && reconnect_attempts) { btd_add_disconnect_cb(disconnect_cb); btd_add_conn_fail_cb(conn_fail_cb); } - if (auto_enable) - btd_register_adapter_driver(&policy_driver); + btd_register_adapter_driver(&policy_driver); return 0; } @@ -883,8 +942,7 @@ static void policy_exit(void) btd_service_remove_state_cb(service_id); - if (auto_enable) - btd_unregister_adapter_driver(&policy_driver); + btd_unregister_adapter_driver(&policy_driver); } BLUETOOTH_PLUGIN_DEFINE(policy, VERSION, BLUETOOTH_PLUGIN_PRIORITY_DEFAULT, diff --git a/src/main.c b/src/main.c index b37c32948..038f867b5 100644 --- a/src/main.c +++ b/src/main.c @@ -131,6 +131,7 @@ static const char *policy_options[] = { "ReconnectAttempts", "ReconnectIntervals", "AutoEnable", + "ResumeDelay", NULL }; diff --git a/src/main.conf b/src/main.conf index e1d77cc47..9f882e65a 100644 --- a/src/main.conf +++ b/src/main.conf @@ -202,3 +202,12 @@ # This includes adapters present on start as well as adapters that are plugged # in later on. Defaults to 'false'. #AutoEnable=false + +# Audio devices that were disconnected due to suspend will be reconnected on +# resume. ResumeDelay determines the delay between when the controller +# resumes from suspend and a connection attempt is made. A longer delay is +# better for better co-existence with Wi-Fi. +# The value is in seconds. +# Default: 2 +#ResumeDelay = 2 +