Received-SPF: pass (google.com: domain of linux-bluetooth-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
From:   Luiz Augusto von Dentz <luiz.dentz@gmail.com>
To:     linux-bluetooth@vger.kernel.org
Subject: [PATCH 1/2] Bluetooth: btusb: Add CONFIG_BT_HCIBTUSB_POLL_SYNC
Date:   Tue, 25 Oct 2022 14:12:57 -0700
Message-Id: <20221025211258.1385541-1-luiz.dentz@gmail.com>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

From: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>

This adds CONFIG_BT_HCIBTUSB_POLL_SYNC which can be used to set the
default behavior of Bluetooth USB controller with respect to poll
synchronization of its endpoits.

Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
---
 drivers/bluetooth/Kconfig | 10 ++++++++++
 drivers/bluetooth/btusb.c |  3 +++
 2 files changed, 13 insertions(+)

diff --git a/drivers/bluetooth/Kconfig b/drivers/bluetooth/Kconfig
index e30707405455..fc36057d546d 100644
--- a/drivers/bluetooth/Kconfig
+++ b/drivers/bluetooth/Kconfig
@@ -45,6 +45,16 @@ config BT_HCIBTUSB_AUTOSUSPEND
 	  This can be overridden by passing btusb.enable_autosuspend=[y|n]
 	  on the kernel commandline.
 
+config BT_HCIBTUSB_POLL_SYNC
+	bool "Enable USB poll_sync for Bluetooth USB devices by default"
+	depends on BT_HCIBTUSB
+	help
+	  poll_sync synchronizes the USB data and event endpoints by
+	  prioritizing the later.
+
+	  Say Y here to enable USB poll_sync for Bluetooth USB devices by
+	  default.
+
 config BT_HCIBTUSB_BCM
 	bool "Broadcom protocol support"
 	depends on BT_HCIBTUSB
diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index 30dd443f395f..bf978d3659cb 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -32,6 +32,7 @@
 static bool disable_scofix;
 static bool force_scofix;
 static bool enable_autosuspend = IS_ENABLED(CONFIG_BT_HCIBTUSB_AUTOSUSPEND);
+static bool enable_poll_sync = IS_ENABLED(CONFIG_BT_HCIBTUSB_POLL_SYNC);
 static bool reset = true;
 
 static struct usb_driver btusb_driver;
@@ -3973,6 +3974,8 @@ static int btusb_probe(struct usb_interface *intf,
 	if (enable_autosuspend)
 		usb_enable_autosuspend(data->udev);
 
+	data->poll_sync = enable_poll_sync;
+
 	err = hci_register_dev(hdev);
 	if (err < 0)
 		goto out_free_dev;
-- 
2.37.3