From: Zijun Hu <zijuhu@codeaurora.org>
To: marcel@holtmann.org, johan.hedberg@gmail.com, luiz.dentz@gmail.com
Cc: linux-kernel@vger.kernel.org, linux-bluetooth@vger.kernel.org,
linux-arm-msm@vger.kernel.org, c-hbandi@codeaurora.org,
hemantg@codeaurora.org, rjliao@codeaurora.org,
zijuhu@codeaurora.org, tjiang@codeaurora.org,
Zijun Hu <quic_zijuhu@quicinc.com>
Subject: [PATCH v3] Bluetooth: btusb: Improve stability for QCA devices
Date: Mon, 14 Feb 2022 18:35:35 +0800 [thread overview]
Message-ID: <1644834935-23189-1-git-send-email-zijuhu@codeaurora.org> (raw)
From: Zijun Hu <quic_zijuhu@quicinc.com>
Controller will reset after NVM is downloaded for QCA
device, so wait a moment for reset Done then go ahead
to improve stability.
Signed-off-by: Zijun Hu <quic_zijuhu@quicinc.com>
---
drivers/bluetooth/btusb.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index e03dfbd92fcc..4932c0bb6662 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -2994,6 +2994,7 @@ static int btusb_set_bdaddr_wcn6855(struct hci_dev *hdev,
#define QCA_PATCH_UPDATED 0x80
#define QCA_DFU_TIMEOUT 3000
#define QCA_FLAG_MULTI_NVM 0x80
+#define QCA_BT_RESET_WAIT_MS 100
#define WCN6855_2_0_RAM_VERSION_GF 0x400c1200
#define WCN6855_2_1_RAM_VERSION_GF 0x400c1211
@@ -3320,6 +3321,13 @@ static int btusb_setup_qca(struct hci_dev *hdev)
err = btusb_setup_qca_load_nvm(hdev, &ver, info);
if (err < 0)
return err;
+
+ /* WCN6855 2.1 will reset to apply firmware downloaded here, so
+ * wait ~100ms for reset Done then go ahead, otherwise, it maybe
+ * cause potential enable failure.
+ */
+ if (info->rom_version == 0x00130201)
+ msleep(QCA_BT_RESET_WAIT_MS);
}
return 0;
--
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project
next reply other threads:[~2022-02-14 11:07 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-14 10:35 Zijun Hu [this message]
2022-02-14 11:58 ` [v3] Bluetooth: btusb: Improve stability for QCA devices bluez.test.bot
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