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From:   <sean.wang@mediatek.com>
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        Mark Chen <mark-yw.chen@mediatek.com>
Subject: [PATCH 3/7] Bluetooth: mt7921s: fix bus hang with wrong privilege
Date:   Wed, 12 Jan 2022 15:39:13 +0800
Message-ID: <b9808578935c07e64203b6432a4f0a5548271131.1641972745.git.objelf@gmail.com>
In-Reply-To: <bddfacd096b6fe927d08e48ad6993c17c9954028.1641972745.git.objelf@gmail.com>
References: <bddfacd096b6fe927d08e48ad6993c17c9954028.1641972745.git.objelf@gmail.com>
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From: Mark Chen <mark-yw.chen@mediatek.com>

According to chip hw flow, mt7921s need to re-acquire privilege
again before normal running. Otherwise, the bus may be stuck in
an abnormal status.

Fixes: c603bf1f94d0 ("Bluetooth: btmtksdio: add MT7921s Bluetooth support")
Co-developed-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Mark Chen <mark-yw.chen@mediatek.com>
---
 drivers/bluetooth/btmtksdio.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/bluetooth/btmtksdio.c b/drivers/bluetooth/btmtksdio.c
index 8cbd49013d86..0951bb10d117 100644
--- a/drivers/bluetooth/btmtksdio.c
+++ b/drivers/bluetooth/btmtksdio.c
@@ -960,6 +960,14 @@ 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) {
-- 
2.25.1