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Date: Sun, 26 Sep 2021 15:07:46 +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,
Joseph Hwang <josephsih@...omium.org>,
Miao-chen Chou <mcchou@...omium.org>,
"David S. Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>,
Johan Hedberg <johan.hedberg@...il.com>,
linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: [PATCH v4 1/4] Bluetooth: aosp: Support AOSP Bluetooth Quality Report
This patch adds the support of the AOSP Bluetooth Quality Report
(BQR) events.
Multiple vendors have supported the AOSP Bluetooth Quality Report.
When a Bluetooth controller supports the capability, it can enable
the capability through hci_set_aosp_capable. Then hci_core will
set up the hdev->set_quality_report callback accordingly.
Note that Intel also supports a distinct telemetry quality report
specification. Intel sets up the hdev->set_quality_report callback
in the btusb driver module.
Reviewed-by: Miao-chen Chou <mcchou@...omium.org>
Signed-off-by: Joseph Hwang <josephsih@...omium.org>
---
Changes in v4:
- Move the AOSP BQR support from the driver level to net/bluetooth/aosp.
- Fix the drivers to use hci_set_aosp_capable to enable aosp.
- Add Mediatek to support the capability too.
Changes in v3:
- Fix the auto build test ERROR
"undefined symbol: btandroid_set_quality_report" that occurred
with some kernel configs.
- Note that the mgmt-tester "Read Exp Feature - Success" failed.
But on my test device, the same test passed. Please kindly let me
know what may be going wrong. These patches do not actually
modify read/set experimental features.
- As to CheckPatch failed. No need to modify the MAINTAINERS file.
Thanks.
Changes in v2:
- Fix the titles of patches 2/3 and 3/3 and reduce their lengths.
net/bluetooth/aosp.c | 79 ++++++++++++++++++++++++++++++++++++++++
net/bluetooth/aosp.h | 7 ++++
net/bluetooth/hci_core.c | 17 +++++++++
3 files changed, 103 insertions(+)
diff --git a/net/bluetooth/aosp.c b/net/bluetooth/aosp.c
index a1b7762335a5..c2b22bc83fb2 100644
--- a/net/bluetooth/aosp.c
+++ b/net/bluetooth/aosp.c
@@ -33,3 +33,82 @@ void aosp_do_close(struct hci_dev *hdev)
bt_dev_dbg(hdev, "Cleanup of AOSP extension");
}
+
+/* BQR command */
+#define BQR_OPCODE hci_opcode_pack(0x3f, 0x015e)
+
+/* BQR report action */
+#define REPORT_ACTION_ADD 0x00
+#define REPORT_ACTION_DELETE 0x01
+#define REPORT_ACTION_CLEAR 0x02
+
+/* BQR event masks */
+#define QUALITY_MONITORING BIT(0)
+#define APPRAOCHING_LSTO BIT(1)
+#define A2DP_AUDIO_CHOPPY BIT(2)
+#define SCO_VOICE_CHOPPY BIT(3)
+
+#define DEFAULT_BQR_EVENT_MASK (QUALITY_MONITORING | APPRAOCHING_LSTO | \
+ A2DP_AUDIO_CHOPPY | SCO_VOICE_CHOPPY)
+
+/* Reporting at milliseconds so as not to stress the controller too much.
+ * Range: 0 ~ 65535 ms
+ */
+#define DEFALUT_REPORT_INTERVAL_MS 5000
+
+struct aosp_bqr_cp {
+ __u8 report_action;
+ __u32 event_mask;
+ __u16 min_report_interval;
+} __packed;
+
+static int enable_quality_report(struct hci_dev *hdev)
+{
+ struct sk_buff *skb;
+ struct aosp_bqr_cp cp;
+
+ cp.report_action = REPORT_ACTION_ADD;
+ cp.event_mask = DEFAULT_BQR_EVENT_MASK;
+ cp.min_report_interval = DEFALUT_REPORT_INTERVAL_MS;
+
+ skb = __hci_cmd_sync(hdev, BQR_OPCODE, sizeof(cp), &cp,
+ HCI_CMD_TIMEOUT);
+ if (IS_ERR(skb)) {
+ bt_dev_err(hdev, "Enabling Android BQR failed (%ld)",
+ PTR_ERR(skb));
+ return PTR_ERR(skb);
+ }
+
+ kfree_skb(skb);
+ return 0;
+}
+
+static int disable_quality_report(struct hci_dev *hdev)
+{
+ struct sk_buff *skb;
+ struct aosp_bqr_cp cp = { 0 };
+
+ cp.report_action = REPORT_ACTION_CLEAR;
+
+ skb = __hci_cmd_sync(hdev, BQR_OPCODE, sizeof(cp), &cp,
+ HCI_CMD_TIMEOUT);
+ if (IS_ERR(skb)) {
+ bt_dev_err(hdev, "Disabling Android BQR failed (%ld)",
+ PTR_ERR(skb));
+ return PTR_ERR(skb);
+ }
+
+ kfree_skb(skb);
+ return 0;
+}
+
+int aosp_set_quality_report(struct hci_dev *hdev, bool enable)
+{
+ bt_dev_info(hdev, "quality report enable %d", enable);
+
+ /* Enable or disable the quality report feature. */
+ if (enable)
+ return enable_quality_report(hdev);
+ else
+ return disable_quality_report(hdev);
+}
diff --git a/net/bluetooth/aosp.h b/net/bluetooth/aosp.h
index 328fc6d39f70..384e111c1260 100644
--- a/net/bluetooth/aosp.h
+++ b/net/bluetooth/aosp.h
@@ -8,9 +8,16 @@
void aosp_do_open(struct hci_dev *hdev);
void aosp_do_close(struct hci_dev *hdev);
+int aosp_set_quality_report(struct hci_dev *hdev, bool enable);
+
#else
static inline void aosp_do_open(struct hci_dev *hdev) {}
static inline void aosp_do_close(struct hci_dev *hdev) {}
+static inline int aosp_set_quality_report(struct hci_dev *hdev, bool enable)
+{
+ return false;
+}
+
#endif
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index aeec5a3031a6..a2c22a4921d4 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -1315,6 +1315,21 @@ static void hci_dev_get_bd_addr_from_property(struct hci_dev *hdev)
bacpy(&hdev->public_addr, &ba);
}
+static void hci_set_quality_report(struct hci_dev *hdev)
+{
+#ifdef CONFIG_BT_AOSPEXT
+ if (hdev->aosp_capable) {
+ /* The hdev->set_quality_report callback is setup here for
+ * the vendors that support AOSP quality report specification.
+ * Note that Intel, while supporting a distinct telemetry
+ * quality report specification, sets up the
+ * hdev->set_quality_report callback in the btusb module.
+ */
+ hdev->set_quality_report = aosp_set_quality_report;
+ }
+#endif
+}
+
static int hci_dev_do_open(struct hci_dev *hdev)
{
int ret = 0;
@@ -1394,6 +1409,8 @@ static int hci_dev_do_open(struct hci_dev *hdev)
if (ret)
goto setup_failed;
+ hci_set_quality_report(hdev);
+
if (test_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks)) {
if (!bacmp(&hdev->public_addr, BDADDR_ANY))
hci_dev_get_bd_addr_from_property(hdev);
--
2.33.0.685.g46640cef36-goog
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