diff mbox series

[v7,2/2] Bluetooth: aosp: Support AOSP Bluetooth Quality Report

Message ID 20211102151908.v7.2.Iaa4a0269e51d8e8d8784a6ac8e05899b49a1377d@changeid (mailing list archive)
State Awaiting Upstream
Delegated to: Netdev Maintainers
Headers show
Series [v7,1/2] Bluetooth: Add struct of reading AOSP vendor capabilities | expand

Checks

Context Check Description
netdev/cover_letter success Single patches do not need cover letters
netdev/fixes_present success Fixes tag not required for -next series
netdev/patch_count success Link
netdev/subject_prefix warning Target tree name not specified in the subject
netdev/cc_maintainers success CCed 7 of 7 maintainers
netdev/source_inline success Was 0 now: 0
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/module_param success Was 0 now: 0
netdev/build_32bit success Errors and warnings before: 2 this patch: 2
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/verify_fixes success No Fixes tag
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 165 lines checked
netdev/build_allmodconfig_warn success Errors and warnings before: 2 this patch: 2
netdev/header_inline success No static functions without inline keyword in header files
netdev/tree_selection success Guessing tree name failed - patch did not apply

Commit Message

Joseph Hwang Nov. 2, 2021, 7:19 a.m. UTC 
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 aosp capability through hci_set_aosp_capable. Then hci_core will
set up the hdev->aosp_set_quality_report callback through aosp_do_open
if the controller responds to support the quality report capability.

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@chromium.org>
Signed-off-by: Joseph Hwang <josephsih@chromium.org>

---

Changes in v7:
- Remove the unnecessary debug print.

Changes in v6:
- Use the decimal version instead of hexadecimal version to be
  consistent with the AOSP specification.
- Move the code of checking the bluetooth_quality_report_support field
  to the previous patch.

Changes in v5:
- Fix the patch per
  [RFC PATCH] Bluetooth: Add framework for AOSP quality report setting
- Declare aosp_set_quality_report.
- Use aosp_do_open() to set hdev->aosp_set_quality_report.
- Add aosp_has_quality_report().
- In mgmt, use hdev->aosp_set_quality_report and
  hdev->set_quality_report separately.

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 | 87 ++++++++++++++++++++++++++++++++++++++++++++
 net/bluetooth/aosp.h | 13 +++++++
 net/bluetooth/mgmt.c | 17 ++++++---
 3 files changed, 112 insertions(+), 5 deletions(-)

Comments

Marcel Holtmann Nov. 2, 2021, 6:41 p.m. UTC | #1 
Hi Joseph,

> 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 aosp capability through hci_set_aosp_capable. Then hci_core will
> set up the hdev->aosp_set_quality_report callback through aosp_do_open
> if the controller responds to support the quality report capability.
> 
> 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@chromium.org>
> Signed-off-by: Joseph Hwang <josephsih@chromium.org>
> 
> ---
> 
> Changes in v7:
> - Remove the unnecessary debug print.
> 
> Changes in v6:
> - Use the decimal version instead of hexadecimal version to be
>  consistent with the AOSP specification.
> - Move the code of checking the bluetooth_quality_report_support field
>  to the previous patch.
> 
> Changes in v5:
> - Fix the patch per
>  [RFC PATCH] Bluetooth: Add framework for AOSP quality report setting
> - Declare aosp_set_quality_report.
> - Use aosp_do_open() to set hdev->aosp_set_quality_report.
> - Add aosp_has_quality_report().
> - In mgmt, use hdev->aosp_set_quality_report and
>  hdev->set_quality_report separately.
> 
> 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 | 87 ++++++++++++++++++++++++++++++++++++++++++++
> net/bluetooth/aosp.h | 13 +++++++
> net/bluetooth/mgmt.c | 17 ++++++---
> 3 files changed, 112 insertions(+), 5 deletions(-)

patch has been applied to bluetooth-next tree.

Regards

Marcel
diff mbox series

Patch

diff --git a/net/bluetooth/aosp.c b/net/bluetooth/aosp.c
index 0d4f1702ce35..86ac6e92ae3d 100644
--- a/net/bluetooth/aosp.c
+++ b/net/bluetooth/aosp.c
@@ -114,3 +114,90 @@  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;
+}
+
+bool aosp_has_quality_report(struct hci_dev *hdev)
+{
+	return hdev->aosp_quality_report;
+}
+
+int aosp_set_quality_report(struct hci_dev *hdev, bool enable)
+{
+	if (!aosp_has_quality_report(hdev))
+		return -EOPNOTSUPP;
+
+	bt_dev_dbg(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..2fd8886d51b2 100644
--- a/net/bluetooth/aosp.h
+++ b/net/bluetooth/aosp.h
@@ -8,9 +8,22 @@ 
 void aosp_do_open(struct hci_dev *hdev);
 void aosp_do_close(struct hci_dev *hdev);
 
+bool aosp_has_quality_report(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 bool aosp_has_quality_report(struct hci_dev *hdev)
+{
+	return false;
+}
+
+static inline int aosp_set_quality_report(struct hci_dev *hdev, bool enable)
+{
+	return -EOPNOTSUPP;
+}
+
 #endif
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index a7d35c138713..06384d761928 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -39,6 +39,7 @@ 
 #include "mgmt_config.h"
 #include "msft.h"
 #include "eir.h"
+#include "aosp.h"
 
 #define MGMT_VERSION	1
 #define MGMT_REVISION	21
@@ -3934,7 +3935,8 @@  static int read_exp_features_info(struct sock *sk, struct hci_dev *hdev,
 		idx++;
 	}
 
-	if (hdev && hdev->set_quality_report) {
+	if (hdev && (aosp_has_quality_report(hdev) ||
+		     hdev->set_quality_report)) {
 		if (hci_dev_test_flag(hdev, HCI_QUALITY_REPORT))
 			flags = BIT(0);
 		else
@@ -4198,7 +4200,7 @@  static int set_quality_report_func(struct sock *sk, struct hci_dev *hdev,
 	val = !!cp->param[0];
 	changed = (val != hci_dev_test_flag(hdev, HCI_QUALITY_REPORT));
 
-	if (!hdev->set_quality_report) {
+	if (!aosp_has_quality_report(hdev) && !hdev->set_quality_report) {
 		err = mgmt_cmd_status(sk, hdev->id,
 				      MGMT_OP_SET_EXP_FEATURE,
 				      MGMT_STATUS_NOT_SUPPORTED);
@@ -4206,13 +4208,18 @@  static int set_quality_report_func(struct sock *sk, struct hci_dev *hdev,
 	}
 
 	if (changed) {
-		err = hdev->set_quality_report(hdev, val);
+		if (hdev->set_quality_report)
+			err = hdev->set_quality_report(hdev, val);
+		else
+			err = aosp_set_quality_report(hdev, val);
+
 		if (err) {
 			err = mgmt_cmd_status(sk, hdev->id,
 					      MGMT_OP_SET_EXP_FEATURE,
 					      MGMT_STATUS_FAILED);
 			goto unlock_quality_report;
 		}
+
 		if (val)
 			hci_dev_set_flag(hdev, HCI_QUALITY_REPORT);
 		else
@@ -4224,8 +4231,8 @@  static int set_quality_report_func(struct sock *sk, struct hci_dev *hdev,
 	memcpy(rp.uuid, quality_report_uuid, 16);
 	rp.flags = cpu_to_le32(val ? BIT(0) : 0);
 	hci_sock_set_flag(sk, HCI_MGMT_EXP_FEATURE_EVENTS);
-	err = mgmt_cmd_complete(sk, hdev->id,
-				MGMT_OP_SET_EXP_FEATURE, 0,
+
+	err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_SET_EXP_FEATURE, 0,
 				&rp, sizeof(rp));
 
 	if (changed)