linux-kernel - [PATCH v1] Bluetooth: hci_qca: Increase settling time for baudrate change VSC

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Date: Mon, 17 Jun 2024 12:30:39 +0530
From: Janaki Ramaiah Thota <quic_janathot@...cinc.com>
To: Marcel Holtmann <marcel@...tmann.org>,
        Luiz Augusto von Dentz
	<luiz.dentz@...il.com>
CC: <quic_mohamull@...cinc.com>, <quic_hbandi@...cinc.com>,
        <linux-bluetooth@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH v1] Bluetooth: hci_qca: Increase settling time for baudrate change VSC

This change is done to align the settling time and
synchronization for baudrate VSC for WCN6750.

In logging disabled builds and few devices
baudrate change and flow control is taking time
so increasing the wait time to controller and uart
to handle baudrate change request properly.

Signed-off-by: Janaki Ramaiah Thota <quic_janathot@...cinc.com>
---
 drivers/bluetooth/hci_qca.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
index 0c9c9ee56592..667687835306 100644
--- a/drivers/bluetooth/hci_qca.c
+++ b/drivers/bluetooth/hci_qca.c
@@ -1356,12 +1356,15 @@ static int qca_set_baudrate(struct hci_dev *hdev, uint8_t baudrate)
 	case QCA_WCN3990:
 	case QCA_WCN3991:
 	case QCA_WCN3998:
-	case QCA_WCN6750:
 	case QCA_WCN6855:
 	case QCA_WCN7850:
 		usleep_range(1000, 10000);
 		break;
 
+	case QCA_WCN6750:
+		msleep(30);
+		break;
+
 	default:
 		msleep(300);
 	}
-- 
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