From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailgw01.mediatek.com (unknown [60.244.123.138]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9CAF34334C9; Fri, 11 Sep 2026 10:42:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=60.244.123.138 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789123371; cv=none; b=eBrG7hAAavkIWy1bWiY2EtN8elTPwKvNzzR2gplevDWzYHhUkDQ4Qa9htfDIIVMGdYp05dBSNtNZGxv8npspIIrCcqndEE/pgHjkdRALf0ylO6xnYczSAFWfdDCP0/tbo7O1kpG1E+uUiQ0ajaLK4hpeTYa7k7ZMRDHZb71eU2M= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789123371; c=relaxed/simple; bh=A2UUjumpJALQwB3PV73WqgCwkzFiejNqyd4nz7tZNDY=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=V3yFyJsovPiRaGIgoewJjBdTJfiSz/cYa7g6DyV9THfnFi0aVuaDacGpt4jd4OQWOD/ZznO8SvPZJq4HWGndMrK2ZtZIHQg4WLbFLweJJRnU404Wwt0IvQOSyrA3qCEJKlJ8keYMiqCVHYnXfBrH/riagyYa44mEswJqsr9JPhs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=mediatek.com; spf=pass smtp.mailfrom=mediatek.com; dkim=pass (1024-bit key) header.d=mediatek.com header.i=@mediatek.com header.b=Esfr6rOY; arc=none smtp.client-ip=60.244.123.138 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=mediatek.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=mediatek.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=mediatek.com header.i=@mediatek.com header.b="Esfr6rOY" X-UUID: 81d5e89cadcd11f1b1788b6acf885367-20260911 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Type:Content-Transfer-Encoding:MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:CC:To:From; bh=r+chzdE/1S/BzIaN/qocSSODG0oKFICuJeWiAt1OqGY=; b=Esfr6rOYvH7yzpKZPv1kPycCgNBjiRtuIYtpP2P0iNqr8Lr+16HyhsEG3kDARqDQCitdEdFsxqdcDcvlnoJkH1VVkcAbd2HBaYcQSHZqdtBspgYt3YuXlffU5djQjKuapd/KEMnXBt4r6X/lF+mSw8zF8splRfaO7bfjfbW34Jk=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.3.19,REQID:34227e5c-7f12-4257-9976-2cd13a823daa,IP:0,U RL:0,TC:0,Content:0,EDM:0,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTION: release,TS:0 X-CID-META: VersionHash:7db8b62,CLOUDID:7c5964e3-ea51-4dda-a022-9ba6608a11d1,B ulkID:nil,BulkQuantity:0,SF:81|82|102|836|865|888|898,TC:-5,Content:0|15|5 0|99,EDM:-3,IP:nil,URL:0,File:130,RT:0,Bulk:nil,QS:nil,BEC:-1,COL:0,OSI:0, OSA:0,AV:0,LES:1,SPR:NO,DKR:0,DKP:0,BRR:0,BRE:0,ARC:0 X-CID-BVR: 2,SSN|SDN X-CID-BAS: 2,SSN|SDN,0,_ X-CID-FACTOR: TF_CID_SPAM_SNR X-CID-RHF: D41D8CD98F00B204E9800998ECF8427E X-UUID: 81d5e89cadcd11f1b1788b6acf885367-20260911 Received: from mtkmbs14n2.mediatek.inc [(172.21.101.76)] by mailgw01.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 1287144272; Fri, 11 Sep 2026 18:42:38 +0800 Received: from mtkmbs13n1.mediatek.inc (172.21.101.193) by MTKMBS09N1.mediatek.inc (172.21.101.35) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.29; Fri, 11 Sep 2026 18:42:37 +0800 Received: from mtksitap99.mediatek.inc (10.233.130.16) by mtkmbs13n1.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.2562.29 via Frontend Transport; Fri, 11 Sep 2026 18:42:37 +0800 From: Chris Lu To: Marcel Holtmann , Johan Hedberg , Luiz Von Dentz CC: Sean Wang , Will Lee , SS Wu , linux-bluetooth , linux-kernel , linux-mediatek , Chris Lu Subject: [PATCH 1/3] Bluetooth: btmtk: Route firmware debug event to the diag channel Date: Fri, 11 Sep 2026 18:42:32 +0800 Message-ID: <20260911104234.2276126-2-chris.lu@mediatek.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20260911104234.2276126-1-chris.lu@mediatek.com> References: <20260911104234.2276126-1-chris.lu@mediatek.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain MediaTek controllers may emit a firmware debug event on the ACL channel using the reserved handle 0x0efd, which shows up in the ACL header as 0x2efd once the start fragment flag is included. Neither btmtk_usb_recv_acl() nor btmtksdio_recv_acl() recognizes it, so the packet is passed to the HCI core, which has no connection with that handle and complains: Bluetooth: hci0: ACL packet for unknown connection handle 3837 Handle it the same way as the existing firmware debug logging packets and forward it to the diagnostic channel instead. Verified on MT7922: under the condition that triggers this firmware debug event, it is now routed to the diag channel instead of reaching the host as an unknown ACL packet. Signed-off-by: Chris Lu --- drivers/bluetooth/btmtk.c | 1 + drivers/bluetooth/btmtksdio.c | 1 + 2 files changed, 2 insertions(+) diff --git a/drivers/bluetooth/btmtk.c b/drivers/bluetooth/btmtk.c index 660ed5b02841..5b0a131bc9d2 100644 --- a/drivers/bluetooth/btmtk.c +++ b/drivers/bluetooth/btmtk.c @@ -1076,6 +1076,7 @@ int btmtk_usb_recv_acl(struct hci_dev *hdev, struct sk_buff *skb) fallthrough; case 0x05ff: /* Firmware debug logging 1 */ case 0x05fe: /* Firmware debug logging 2 */ + case 0x2efd: /* Firmware debug event */ return hci_recv_diag(hdev, skb); } diff --git a/drivers/bluetooth/btmtksdio.c b/drivers/bluetooth/btmtksdio.c index fe4ca9395aa3..9a1b6f9b0872 100644 --- a/drivers/bluetooth/btmtksdio.c +++ b/drivers/bluetooth/btmtksdio.c @@ -460,6 +460,7 @@ static int btmtksdio_recv_acl(struct hci_dev *hdev, struct sk_buff *skb) fallthrough; case 0x05ff: case 0x05fe: + case 0x2efd: /* Firmware debug event */ /* Firmware debug logging */ return hci_recv_diag(hdev, skb); } -- 2.45.2