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Bluetooth: btmtksdio: fix possible FW initialization failure

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According to FW advised sequence, mt7921s need to re-acquire privilege
immediately after the firmware download is complete before normal running.
Otherwise, it is still possible the bus may be stuck in an abnormal status
that causes FW initialization failure in the current driver.

Fixes: 752aea5848 ("Bluetooth: mt7921s: fix bus hang with wrong privilege")
Co-developed-by: Yake Yang <yake.yang@mediatek.com>
Signed-off-by: Yake Yang <yake.yang@mediatek.com>
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Sean Wang 2022-05-13 05:38:12 +08:00 committed by Marcel Holtmann
parent 0fab6361c4
commit 7469720563
1 changed files with 8 additions and 8 deletions
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16
drivers/bluetooth/btmtksdio.c
View file

@ -864,6 +864,14 @@ static int mt79xx_setup(struct hci_dev *hdev, const char *fwname)
return err;
}
err = btmtksdio_fw_pmctrl(bdev);
if (err < 0)
return err;
err = btmtksdio_drv_pmctrl(bdev);
if (err < 0)
return err;
/* Enable Bluetooth protocol */
wmt_params.op = BTMTK_WMT_FUNC_CTRL;
wmt_params.flag = 0;
@ -1109,14 +1117,6 @@ static int btmtksdio_setup(struct hci_dev *hdev)
if (err < 0)
return err;
err = btmtksdio_fw_pmctrl(bdev);
if (err < 0)
return err;
err = btmtksdio_drv_pmctrl(bdev);
if (err < 0)
return err;
/* Enable SCO over I2S/PCM */
err = btmtksdio_sco_setting(hdev);
if (err < 0) {