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Bluetooth: hci_h5: btrtl: Maintain flow control if wakeup is enabled 

For chips that doesn't reset on suspend, we need to provide the correct
value of flow_control when it resumes. Therefore, store the flow
control value when reading from the config file to be reused upon
suspend.

Signed-off-by: Archie Pusaka <apusaka@chromium.org>
Reviewed-by: Abhishek Pandit-Subedi <abhishekpandit@chromium.org>
Reviewed-by: Hilda Wu <hildawu@realtek.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Archie Pusaka 2021-07-23 19:31:56 +08:00 committed by Marcel Holtmann
parent 66f077dde7
commit 30f11dda2d
1 changed files with 8 additions and 0 deletions
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8
drivers/bluetooth/hci_h5.c
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@ -54,6 +54,7 @@ enum {
H5_RX_ESC, /* SLIP escape mode */
H5_TX_ACK_REQ, /* Pending ack to send */
H5_WAKEUP_DISABLE, /* Device cannot wake host */
H5_HW_FLOW_CONTROL, /* Use HW flow control */
};
struct h5 {
@ -920,6 +921,9 @@ static int h5_btrtl_setup(struct h5 *h5)
serdev_device_set_baudrate(h5->hu->serdev, controller_baudrate);
serdev_device_set_flow_control(h5->hu->serdev, flow_control);
if (flow_control)
set_bit(H5_HW_FLOW_CONTROL, &h5->flags);
err = btrtl_download_firmware(h5->hu->hdev, btrtl_dev);
/* Give the device some time before the hci-core sends it a reset */
usleep_range(10000, 20000);
@ -1012,7 +1016,11 @@ static int h5_btrtl_resume(struct h5 *h5)
queue_work(system_long_wq, &reprobe->work);
} else {
gpiod_set_value_cansleep(h5->device_wake_gpio, 1);
if (test_bit(H5_HW_FLOW_CONTROL, &h5->flags))
serdev_device_set_flow_control(h5->hu->serdev, true);
}
return 0;
}