* [PATCH v1 1/2] Bluetooth: hci_serdev: Close UART port if NON_PERSISTENT_SETUP is set
2020-09-01 14:24 [PATCH v1 0/2] Close UART port if NON_PERSISTENT_SETUP is set Venkata Lakshmi Narayana Gubba
@ 2020-09-01 14:24 ` Venkata Lakshmi Narayana Gubba
2020-09-01 14:24 ` [PATCH v1 2/2] Bluetooth: hci_qca: Remove duplicate power off in proto close Venkata Lakshmi Narayana Gubba
1 sibling, 0 replies; 3+ messages in thread
From: Venkata Lakshmi Narayana Gubba @ 2020-09-01 14:24 UTC (permalink / raw)
To: marcel, johan.hedberg
Cc: mka, linux-kernel, linux-bluetooth, hemantg, linux-arm-msm,
bgodavar, rjliao, hbandi, abhishekpandit,
Venkata Lakshmi Narayana Gubba
When HCI_QUIRK_NON_PERSISTENT_SETUP is set by drivers,
it indicates that BT SoC will be completely powered OFF
during BT OFF. On next BT ON firmware must be downloaded
again. Holding UART port open during BT OFF is draining
the battery. Now during BT OFF, UART port is closed if
qurik HCI_QUIRK_NON_PERSISTENT_SETUP is set by clearing
HCI_UART_PROTO_READY proto flag. On next BT ON, UART
port is opened if HCI_UART_PROTO_READY proto flag is cleared.
Signed-off-by: Venkata Lakshmi Narayana Gubba <gubbaven@codeaurora.org>
---
drivers/bluetooth/hci_serdev.c | 36 +++++++++++++++++++++++++++++++++---
1 file changed, 33 insertions(+), 3 deletions(-)
diff --git a/drivers/bluetooth/hci_serdev.c b/drivers/bluetooth/hci_serdev.c
index 3977bba..ef96ad0 100644
--- a/drivers/bluetooth/hci_serdev.c
+++ b/drivers/bluetooth/hci_serdev.c
@@ -113,8 +113,22 @@ static int hci_uart_flush(struct hci_dev *hdev)
/* Initialize device */
static int hci_uart_open(struct hci_dev *hdev)
{
+ struct hci_uart *hu = hci_get_drvdata(hdev);
+ int err;
+
BT_DBG("%s %p", hdev->name, hdev);
+ /* When Quirk HCI_QUIRK_NON_PERSISTENT_SETUP is set by
+ * driver, BT SoC is completely turned OFF during
+ * BT OFF. Upon next BT ON UART port should be opened.
+ */
+ if (!test_bit(HCI_UART_PROTO_READY, &hu->flags)) {
+ err = serdev_device_open(hu->serdev);
+ if (err)
+ return err;
+ set_bit(HCI_UART_PROTO_READY, &hu->flags);
+ }
+
/* Undo clearing this from hci_uart_close() */
hdev->flush = hci_uart_flush;
@@ -124,11 +138,25 @@ static int hci_uart_open(struct hci_dev *hdev)
/* Close device */
static int hci_uart_close(struct hci_dev *hdev)
{
+ struct hci_uart *hu = hci_get_drvdata(hdev);
+
BT_DBG("hdev %p", hdev);
+ if (!test_bit(HCI_UART_PROTO_READY, &hu->flags))
+ return 0;
+
hci_uart_flush(hdev);
hdev->flush = NULL;
+ /* When QUIRK HCI_QUIRK_NON_PERSISTENT_SETUP is set by driver,
+ * BT SOC is completely powered OFF during BT OFF, holding port
+ * open may drain the battery.
+ */
+ if (test_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks)) {
+ clear_bit(HCI_UART_PROTO_READY, &hu->flags);
+ serdev_device_close(hu->serdev);
+ }
+
return 0;
}
@@ -354,8 +382,6 @@ void hci_uart_unregister_device(struct hci_uart *hu)
{
struct hci_dev *hdev = hu->hdev;
- clear_bit(HCI_UART_PROTO_READY, &hu->flags);
-
cancel_work_sync(&hu->init_ready);
if (test_bit(HCI_UART_REGISTERED, &hu->flags))
hci_unregister_dev(hdev);
@@ -364,6 +390,10 @@ void hci_uart_unregister_device(struct hci_uart *hu)
cancel_work_sync(&hu->write_work);
hu->proto->close(hu);
- serdev_device_close(hu->serdev);
+
+ if (test_bit(HCI_UART_PROTO_READY, &hu->flags)) {
+ clear_bit(HCI_UART_PROTO_READY, &hu->flags);
+ serdev_device_close(hu->serdev);
+ }
}
EXPORT_SYMBOL_GPL(hci_uart_unregister_device);
--
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member
of Code Aurora Forum, hosted by The Linux Foundation
^ permalink raw reply related [flat|nested] 3+ messages in thread* [PATCH v1 2/2] Bluetooth: hci_qca: Remove duplicate power off in proto close
2020-09-01 14:24 [PATCH v1 0/2] Close UART port if NON_PERSISTENT_SETUP is set Venkata Lakshmi Narayana Gubba
2020-09-01 14:24 ` [PATCH v1 1/2] Bluetooth: hci_serdev: " Venkata Lakshmi Narayana Gubba
@ 2020-09-01 14:24 ` Venkata Lakshmi Narayana Gubba
1 sibling, 0 replies; 3+ messages in thread
From: Venkata Lakshmi Narayana Gubba @ 2020-09-01 14:24 UTC (permalink / raw)
To: marcel, johan.hedberg
Cc: mka, linux-kernel, linux-bluetooth, hemantg, linux-arm-msm,
bgodavar, rjliao, hbandi, abhishekpandit,
Venkata Lakshmi Narayana Gubba
During serdev unregister, hdev->shutdown is called before
proto close. Removing duplicates power OFF call.
Signed-off-by: Venkata Lakshmi Narayana Gubba <gubbaven@codeaurora.org>
---
drivers/bluetooth/hci_qca.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
index 20e1ded..f0d9ee3 100644
--- a/drivers/bluetooth/hci_qca.c
+++ b/drivers/bluetooth/hci_qca.c
@@ -693,8 +693,6 @@ static int qca_close(struct hci_uart *hu)
destroy_workqueue(qca->workqueue);
qca->hu = NULL;
- qca_power_shutdown(hu);
-
kfree_skb(qca->rx_skb);
hu->priv = NULL;
@@ -2032,8 +2030,9 @@ static int qca_serdev_probe(struct serdev_device *serdev)
static void qca_serdev_remove(struct serdev_device *serdev)
{
struct qca_serdev *qcadev = serdev_device_get_drvdata(serdev);
+ struct qca_power *power = qcadev->bt_power;
- if (qca_is_wcn399x(qcadev->btsoc_type))
+ if (qca_is_wcn399x(qcadev->btsoc_type) && power->vregs_on)
qca_power_shutdown(&qcadev->serdev_hu);
else if (qcadev->susclk)
clk_disable_unprepare(qcadev->susclk);
--
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member
of Code Aurora Forum, hosted by The Linux Foundation
^ permalink raw reply related [flat|nested] 3+ messages in thread