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

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Date: Mon, 3 Jun 2024 18:23:56 +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] PENDING: Bluetooth: Increase settling time for baudrate change VSC

From: Harish Bandi <quic_hbandi@...cinc.com>

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.

Change-Id: If0631cb886e53817f963f075e626c89a791b7be4
Signed-off-by: Harish Bandi <quic_hbandi@...cinc.com>
---

diff --git a/drivers/bluetooth/btqca.c b/drivers/bluetooth/btqca.c
index eba9165..a59b35e 100644
--- a/drivers/bluetooth/btqca.c
+++ b/drivers/bluetooth/btqca.c
@@ -600,7 +600,6 @@
 		rom_ver = ((soc_ver & 0x00000f00) >> 0x04) | (soc_ver & 0x0000000f);
 
 	if (soc_type == QCA_WCN6750) {
-		msleep(100);
 		qca_send_patch_config_cmd(hdev);
 	}
 
diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
index d8abd27..0b41214 100644
--- a/drivers/bluetooth/hci_qca.c
+++ b/drivers/bluetooth/hci_qca.c
@@ -1356,11 +1356,13 @@
 	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);
@@ -1904,7 +1906,6 @@
 		qca_set_speed(hu, QCA_INIT_SPEED);
 	}
 
-	usleep_range(1000, 20000);
 	/* Setup user speed if needed */
 	speed = qca_get_speed(hu, QCA_OPER_SPEED);
 	if (speed) {