[PATCH v3] Bluetooth: btusb: Improve stability for QCA devices

[PATCH v3] Bluetooth: btusb: Improve stability for QCA devices

[Zijun Hu]

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;
-- 
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RE: [v3] Bluetooth: btusb: Improve stability for QCA devices

[bluez.test.bot]

[-- Attachment #1: Type: text/plain, Size: 1097 bytes --]

This is automated email and please do not reply to this email!

Dear submitter,

Thank you for submitting the patches to the linux bluetooth mailing list.
This is a CI test results with your patch series:
PW Link:https://patchwork.kernel.org/project/bluetooth/list/?series=614062

---Test result---

Test Summary:
CheckPatch                    PASS      1.59 seconds
GitLint                       PASS      0.95 seconds
SubjectPrefix                 PASS      0.88 seconds
BuildKernel                   PASS      29.75 seconds
BuildKernel32                 PASS      26.48 seconds
Incremental Build with patchesPASS      35.93 seconds
TestRunner: Setup             PASS      473.13 seconds
TestRunner: l2cap-tester      PASS      13.72 seconds
TestRunner: bnep-tester       PASS      6.25 seconds
TestRunner: mgmt-tester       PASS      105.25 seconds
TestRunner: rfcomm-tester     PASS      7.81 seconds
TestRunner: sco-tester        PASS      7.84 seconds
TestRunner: smp-tester        PASS      7.71 seconds
TestRunner: userchan-tester   PASS      6.41 seconds



---
Regards,
Linux Bluetooth