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From: Archie Pusaka <apusaka@google.com>
To: linux-bluetooth <linux-bluetooth@vger.kernel.org>,
	Marcel Holtmann <marcel@holtmann.org>
Cc: CrosBT Upstreaming <chromeos-bluetooth-upstreaming@chromium.org>,
	Archie Pusaka <apusaka@chromium.org>,
	Abhishek Pandit-Subedi <abhishekpandit@chromium.org>,
	Hilda Wu <hildawu@realtek.com>,
	Johan Hedberg <johan.hedberg@gmail.com>,
	Luiz Augusto von Dentz <luiz.dentz@gmail.com>,
	linux-kernel@vger.kernel.org
Subject: [PATCH v2 3/3] Bluetooth: hci_h5: Add runtime suspend
Date: Thu, 15 Jul 2021 22:52:00 +0800	[thread overview]
Message-ID: <20210715225146.v2.3.I4b323d2adf1dca62777c41de344a7d2f79b7f908@changeid> (raw)
In-Reply-To: <20210715225146.v2.1.I68649745bd11a83265f1e816bf34ecc82775e95a@changeid>

From: Archie Pusaka <apusaka@chromium.org>

This patch allows the controller to suspend after a short period of
inactivity.

Signed-off-by: Archie Pusaka <apusaka@chromium.org>
Reviewed-by: Abhishek Pandit-Subedi <abhishekpandit@chromium.org>
Reviewed-by: Hilda Wu <hildawu@realtek.com>

---

(no changes since v1)

 drivers/bluetooth/hci_h5.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/drivers/bluetooth/hci_h5.c b/drivers/bluetooth/hci_h5.c
index cbc63b057f33..f95ec9991180 100644
--- a/drivers/bluetooth/hci_h5.c
+++ b/drivers/bluetooth/hci_h5.c
@@ -11,6 +11,7 @@
 #include <linux/gpio/consumer.h>
 #include <linux/kernel.h>
 #include <linux/mod_devicetable.h>
+#include <linux/pm_runtime.h>
 #include <linux/of_device.h>
 #include <linux/serdev.h>
 #include <linux/skbuff.h>
@@ -21,6 +22,8 @@
 #include "btrtl.h"
 #include "hci_uart.h"
 
+#define SUSPEND_TIMEOUT_MS	6000
+
 #define HCI_3WIRE_ACK_PKT	0
 #define HCI_3WIRE_LINK_PKT	15
 
@@ -584,6 +587,10 @@ static int h5_recv(struct hci_uart *hu, const void *data, int count)
 		count -= processed;
 	}
 
+	pm_runtime_get(&hu->serdev->dev);
+	pm_runtime_mark_last_busy(&hu->serdev->dev);
+	pm_runtime_put_autosuspend(&hu->serdev->dev);
+
 	return 0;
 }
 
@@ -620,6 +627,10 @@ static int h5_enqueue(struct hci_uart *hu, struct sk_buff *skb)
 		break;
 	}
 
+	pm_runtime_get_sync(&hu->serdev->dev);
+	pm_runtime_mark_last_busy(&hu->serdev->dev);
+	pm_runtime_put_autosuspend(&hu->serdev->dev);
+
 	return 0;
 }
 
@@ -951,6 +962,12 @@ static void h5_btrtl_open(struct h5 *h5)
 	serdev_device_set_parity(h5->hu->serdev, SERDEV_PARITY_EVEN);
 	serdev_device_set_baudrate(h5->hu->serdev, 115200);
 
+	pm_runtime_set_active(&h5->hu->serdev->dev);
+	pm_runtime_use_autosuspend(&h5->hu->serdev->dev);
+	pm_runtime_set_autosuspend_delay(&h5->hu->serdev->dev,
+					 SUSPEND_TIMEOUT_MS);
+	pm_runtime_enable(&h5->hu->serdev->dev);
+
 	/* The controller needs up to 500ms to wakeup */
 	gpiod_set_value_cansleep(h5->enable_gpio, 1);
 	gpiod_set_value_cansleep(h5->device_wake_gpio, 1);
@@ -959,6 +976,8 @@ static void h5_btrtl_open(struct h5 *h5)
 
 static void h5_btrtl_close(struct h5 *h5)
 {
+	pm_runtime_disable(&h5->hu->serdev->dev);
+
 	gpiod_set_value_cansleep(h5->device_wake_gpio, 0);
 	gpiod_set_value_cansleep(h5->enable_gpio, 0);
 }
@@ -1066,6 +1085,7 @@ MODULE_DEVICE_TABLE(acpi, h5_acpi_match);
 
 static const struct dev_pm_ops h5_serdev_pm_ops = {
 	SET_SYSTEM_SLEEP_PM_OPS(h5_serdev_suspend, h5_serdev_resume)
+	SET_RUNTIME_PM_OPS(h5_serdev_suspend, h5_serdev_resume, NULL)
 };
 
 static const struct of_device_id rtl_bluetooth_of_match[] = {
-- 
2.32.0.93.g670b81a890-goog


  parent reply	other threads:[~2021-07-15 14:52 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-15 14:51 [PATCH v2 1/3] Bluetooth: hci_h5: add WAKEUP_DISABLE flag Archie Pusaka
2021-07-15 14:51 ` [PATCH v2 2/3] Bluetooth: hci_h5: btrtl: Maintain flow control if wakeup is enabled Archie Pusaka
2021-07-15 14:52 ` Archie Pusaka [this message]
2021-07-15 16:15 ` [v2,1/3] Bluetooth: hci_h5: add WAKEUP_DISABLE flag bluez.test.bot
2021-07-22 14:32 ` [PATCH v2 1/3] " Marcel Holtmann
2021-07-23 11:42   ` Archie Pusaka
2021-07-23 12:17     ` Marcel Holtmann
2021-07-26  4:02       ` Archie Pusaka
2021-07-29 11:54         ` Marcel Holtmann

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