2021-08-17 03:05:05

by Max Chou

Subject: [PATCH v3] Bluetooth: btusb: Remove WAKEUP_DISABLE and add WAKEUP_AUTOSUSPEND for Realtek devices

From: Max Chou <[email protected]>

For the commit of 9e45524a011107a73bc2cdde8370c61e82e93a4d, wakeup is
always disabled for Realtek devices. However, there's the capability
for Realtek devices to apply USB wakeup.

In this commit, remove WAKEUP_DISABLE feature for Realtek devices.
If users would switch wakeup, they should access
"/sys/bus/usb/.../power/wakeup"

In this commit, it also adds the feature as WAKEUP_AUTOSUSPEND
for Realtek devices because it should set do_remote_wakeup on autosuspend.

Signed-off-by: Max Chou <[email protected]>
Tested-by: Hilda Wu <[email protected]>
Reviewed-by: Archie Pusaka <[email protected]>
Reviewed-by: Abhishek Pandit-Subedi <[email protected]>
---
Changes in v2:
-fix the compiling error due to the incorrect patch file submited

Changes in v3:
-do rebase and make the patch on the latest revision
---
drivers/bluetooth/btusb.c | 28 +++++++++-------------------
1 file changed, 9 insertions(+), 19 deletions(-)

diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index 2336f731dbc7..60d2fce59a71 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -527,7 +527,7 @@ static const struct dmi_system_id btusb_needs_reset_resume_table[] = {
#define BTUSB_OOB_WAKE_ENABLED 11
#define BTUSB_HW_RESET_ACTIVE 12
#define BTUSB_TX_WAIT_VND_EVT 13
-#define BTUSB_WAKEUP_DISABLE 14
+#define BTUSB_WAKEUP_AUTOSUSPEND 14
#define BTUSB_USE_ALT3_FOR_WBS 15

struct btusb_data {
@@ -1350,13 +1350,6 @@ static int btusb_open(struct hci_dev *hdev)

data->intf->needs_remote_wakeup = 1;

- /* Disable device remote wakeup when host is suspended
- * For Realtek chips, global suspend without
- * SET_FEATURE (DEVICE_REMOTE_WAKEUP) can save more power in device.
- */
- if (test_bit(BTUSB_WAKEUP_DISABLE, &data->flags))
- device_wakeup_disable(&data->udev->dev);
-
if (test_and_set_bit(BTUSB_INTR_RUNNING, &data->flags))
goto done;

@@ -1423,7 +1416,7 @@ static int btusb_close(struct hci_dev *hdev)
data->intf->needs_remote_wakeup = 0;

/* Enable remote wake up for auto-suspend */
- if (test_bit(BTUSB_WAKEUP_DISABLE, &data->flags))
+ if (test_bit(BTUSB_WAKEUP_AUTOSUSPEND, &data->flags))
data->intf->needs_remote_wakeup = 1;

usb_autopm_put_interface(data->intf);
@@ -3602,9 +3595,6 @@ static bool btusb_prevent_wake(struct hci_dev *hdev)
{
struct btusb_data *data = hci_get_drvdata(hdev);

- if (test_bit(BTUSB_WAKEUP_DISABLE, &data->flags))
- return true;
-
return !device_may_wakeup(&data->udev->dev);
}

@@ -3882,11 +3872,8 @@ static int btusb_probe(struct usb_interface *intf,
hdev->shutdown = btrtl_shutdown_realtek;
hdev->cmd_timeout = btusb_rtl_cmd_timeout;

- /* Realtek devices lose their updated firmware over global
- * suspend that means host doesn't send SET_FEATURE
- * (DEVICE_REMOTE_WAKEUP)
- */
- set_bit(BTUSB_WAKEUP_DISABLE, &data->flags);
+ /* Realtek devices need to set remote wakeup on auto-suspend */
+ set_bit(BTUSB_WAKEUP_AUTOSUSPEND, &data->flags);
set_bit(BTUSB_USE_ALT3_FOR_WBS, &data->flags);
}

@@ -4062,12 +4049,15 @@ static int btusb_suspend(struct usb_interface *intf, pm_message_t message)
* Actually, it depends on whether the usb host sends
* set feature (enable wakeup) or not.
*/
- if (test_bit(BTUSB_WAKEUP_DISABLE, &data->flags)) {
+ if (test_bit(BTUSB_WAKEUP_AUTOSUSPEND, &data->flags)) {
if (PMSG_IS_AUTO(message) &&
device_can_wakeup(&data->udev->dev))
data->udev->do_remote_wakeup = 1;
- else if (!PMSG_IS_AUTO(message))
+ else if (!PMSG_IS_AUTO(message) &&
+ !device_may_wakeup(&data->udev->dev)) {
+ data->udev->do_remote_wakeup = 0;
data->udev->reset_resume = 1;
+ }
}

return 0;
--
2.17.1

2021-08-19 15:12:49

by Marcel Holtmann

Subject: Re: [PATCH v3] Bluetooth: btusb: Remove WAKEUP_DISABLE and add WAKEUP_AUTOSUSPEND for Realtek devices

Hi Max,

> For the commit of 9e45524a011107a73bc2cdde8370c61e82e93a4d, wakeup is
> always disabled for Realtek devices. However, there's the capability
> for Realtek devices to apply USB wakeup.
>
> In this commit, remove WAKEUP_DISABLE feature for Realtek devices.
> If users would switch wakeup, they should access
> "/sys/bus/usb/.../power/wakeup"
>
> In this commit, it also adds the feature as WAKEUP_AUTOSUSPEND
> for Realtek devices because it should set do_remote_wakeup on autosuspend.
>
> Signed-off-by: Max Chou <[email protected]>
> Tested-by: Hilda Wu <[email protected]>
> Reviewed-by: Archie Pusaka <[email protected]>
> Reviewed-by: Abhishek Pandit-Subedi <[email protected]>
> ---
> Changes in v2:
> -fix the compiling error due to the incorrect patch file submited
>
> Changes in v3:
> -do rebase and make the patch on the latest revision
> ---
> drivers/bluetooth/btusb.c | 28 +++++++++-------------------
> 1 file changed, 9 insertions(+), 19 deletions(-)

patch has been applied to bluetooth-next tree.

Regards

Marcel