linux-kernel - [PATCH v9 2/5] Bluetooth: btintel: support link statistics telemetry events

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Message-Id: <20210815201611.v9.2.Ifb35feb49ec588106b256c508259500583582125@changeid>
Date:   Sun, 15 Aug 2021 20:17:14 +0800
From:   Joseph Hwang <josephsih@...omium.org>
To:     linux-bluetooth@...r.kernel.org, marcel@...tmann.org,
        luiz.dentz@...il.com, pali@...nel.org
Cc:     josephsih@...gle.com, chromeos-bluetooth-upstreaming@...omium.org,
        Chethan T N <chethan.tumkur.narayan@...el.com>,
        Miao-chen Chou <mcchou@...omium.org>,
        Kiran K <kiran.k@...el.com>,
        Joseph Hwang <josephsih@...omium.org>,
        Johan Hedberg <johan.hedberg@...il.com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH v9 2/5] Bluetooth: btintel: support link statistics telemetry events

From: Chethan T N <chethan.tumkur.narayan@...el.com>

This patch supports the link statistics telemetry events for
intel controllers

Reviewed-by: Miao-chen Chou <mcchou@...omium.org>
Signed-off-by: Chethan T N <chethan.tumkur.narayan@...el.com>
Signed-off-by: Kiran K <kiran.k@...el.com>
Signed-off-by: Joseph Hwang <josephsih@...omium.org>
---

(no changes since v7)

Changes in v7:
- Rebase on Tedd's patches that moved functionality from btusb to
  btintel.

 drivers/bluetooth/btintel.c | 20 +++++++++++++++++++-
 1 file changed, 19 insertions(+), 1 deletion(-)

diff --git a/drivers/bluetooth/btintel.c b/drivers/bluetooth/btintel.c
index 0fe093fa5158..643e2194ca01 100644
--- a/drivers/bluetooth/btintel.c
+++ b/drivers/bluetooth/btintel.c
@@ -1285,8 +1285,10 @@ static int btintel_read_debug_features(struct hci_dev *hdev,
 static int btintel_set_debug_features(struct hci_dev *hdev,
 			       const struct intel_debug_features *features)
 {
-	u8 mask[11] = { 0x0a, 0x92, 0x02, 0x07, 0x00, 0x00, 0x00, 0x00,
+	u8 mask[11] = { 0x0a, 0x92, 0x02, 0x7f, 0x00, 0x00, 0x00, 0x00,
 			0x00, 0x00, 0x00 };
+	u8 period[5] = { 0x04, 0x91, 0x02, 0x05, 0x00 };
+	u8 trace_enable = 0x02;
 	struct sk_buff *skb;
 
 	if (!features)
@@ -1303,8 +1305,24 @@ static int btintel_set_debug_features(struct hci_dev *hdev,
 			   PTR_ERR(skb));
 		return PTR_ERR(skb);
 	}
+	kfree_skb(skb);
+
+	skb = __hci_cmd_sync(hdev, 0xfc8b, 5, period, HCI_INIT_TIMEOUT);
+	if (IS_ERR(skb)) {
+		bt_dev_err(hdev, "Setting periodicity for link statistics traces failed (%ld)",
+			   PTR_ERR(skb));
+		return PTR_ERR(skb);
+	}
+	kfree_skb(skb);
 
+	skb = __hci_cmd_sync(hdev, 0xfca1, 1, &trace_enable, HCI_INIT_TIMEOUT);
+	if (IS_ERR(skb)) {
+		bt_dev_err(hdev, "Enable tracing of link statistics events failed (%ld)",
+			   PTR_ERR(skb));
+		return PTR_ERR(skb);
+	}
 	kfree_skb(skb);
+
 	return 0;
 }
 
-- 
2.33.0.rc1.237.g0d66db33f3-goog