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From:   Alain Michaud <alainm@chromium.org>
To:     linux-bluetooth@vger.kernel.org
Cc:     Alain Michaud <alainm@chromium.org>
Subject: [BlueZ PATCH v1] profiles/scanparam: use configured scanparams when available
Date:   Fri, 26 Jun 2020 20:53:06 +0000
Message-Id: <20200626205306.803784-1-alainm@chromium.org>
MIME-Version: 1.0
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Sender: linux-bluetooth-owner@vger.kernel.org
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This patch updates the scan parameter service to use the configured scan
parameters when available rather than the hardcoded kernel defaults.

---

 profiles/scanparam/scan.c | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/profiles/scanparam/scan.c b/profiles/scanparam/scan.c
index 9e8f57747..fd22b876b 100644
--- a/profiles/scanparam/scan.c
+++ b/profiles/scanparam/scan.c
@@ -45,12 +45,11 @@
 #include "src/shared/gatt-db.h"
 #include "src/shared/gatt-client.h"
 #include "attrib/att.h"
+#include "src/hcid.h"
 
 #define SCAN_INTERVAL_WIN_UUID		0x2A4F
 #define SCAN_REFRESH_UUID		0x2A31
 
-#define SCAN_INTERVAL		0x0060
-#define SCAN_WINDOW		0x0030
 #define SERVER_REQUIRES_REFRESH	0x00
 
 struct scan {
@@ -75,8 +74,15 @@ static void write_scan_params(struct scan *scan)
 {
 	uint8_t value[4];
 
-	put_le16(SCAN_INTERVAL, &value[0]);
-	put_le16(SCAN_WINDOW, &value[2]);
+	/* Unless scan parameters are configured, use the known kernel default
+	 * parameters */
+	put_le16(main_opts.default_params.le_scan_interval_autoconnect ?
+			main_opts.default_params.le_scan_interval_autoconnect :
+			0x60, &value[0]);
+
+	put_le16(main_opts.default_params.le_scan_win_autoconnect ?
+			main_opts.default_params.le_scan_win_autoconnect :
+			0x30, &value[2]);
 
 	bt_gatt_client_write_without_response(scan->client, scan->iwhandle,
 						false, value, sizeof(value));
-- 
2.27.0.212.ge8ba1cc988-goog