From: Archie Pusaka <apusaka@chromium.org>
Date: Fri, 23 Jul 2021 19:31:56 +0800
Subject: Bluetooth: hci_h5: btrtl: Maintain flow control if wakeup is enabled
Patch-mainline: v5.15-rc1
Git-commit: 30f11dda2d25edcaae5ad34c4b953df4b2ba4faf
References: jsc#PED-1407
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>
Acked-by: Lee, Chun-Yi <jlee@suse.com>
---
drivers/bluetooth/hci_h5.c | 8 ++++++++
1 file changed, 8 insertions(+)
--- a/drivers/bluetooth/hci_h5.c
+++ b/drivers/bluetooth/hci_h5.c
@@ -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;
}