From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 2E5A7C369AB for ; Thu, 24 Apr 2025 08:37:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type:In-Reply-To:From:References:Cc:To:Subject:MIME-Version:Date: Message-ID:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=tyaxou+85fD5CRHoMBs6T9/ZLdEfWSGeQPqjUeW0l9k=; b=1bbaMJlstPJuRWjDRcdu2vkZYM yeqn2V2RhyOtgllxlQJWHr0JOtnQrpIKFzOu6KMXKFTRNdNv7Udq7SgP84lE60s2KgroQ0hGf8/Dk mbUcCyrPwusYwZTsscjq632cstVmc+QpQNEJzFf6BZePGGD++0IiPt8B5XUX/WW5SDNTU2egNFMpP XM6Th/HGeVOmjovVJO87XFG8gJGiOdzeGOMEXbyP9nDfWb5Xbb8X7cnl3e5hIK4MsYCQE4xJDqXRy mhtT4aGz6XHJ23KT29vL8Z+wy3TY1qK27GeBiQCBgCTRrOUuJzgASRgzwld4RESHNptdFhbZ6P8S3 5WORlDew==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1u7s5E-0000000DLeZ-1rUm; Thu, 24 Apr 2025 08:37:24 +0000 Received: from bali.collaboradmins.com ([148.251.105.195]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1u7qwq-0000000DAQJ-35ex; Thu, 24 Apr 2025 07:24:42 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1745479479; bh=TrAcmBN6lYfQHtdSnYmDwJwiksUZsL1Y2yFtmp2AxNg=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=d4mBnTPCkhGkmkL6MG3tORhqckVQKeUum9QYt2CKbeafi2L/P/jEo/DTXD9opnqWM AnB+FFRQWvSOZHILTx5opYylQi9sfFLBTlZzfeaSRoEbmgXJSFsZah/DPd/IONQFfz q4c+bZom/5KruvlWgx6dXzvvHYogQ2SvZsQS+8IK9ZkurBhsaPgZ6wPUP6tw5c3DE4 Ub3524o9344Ifs3Y/gSH1lpxliW8KWn2XkmeQlpen2Bggc+7RpjGf4GnskWSMAi0O8 SNywYTdhxXNJciyr/JiFd/4IieZNALuoJjN2omWk4YnDpwlC4dggywnJUbO5ByLaJO NzVT6ZbMKXoLg== Received: from [192.168.1.100] (2-237-20-237.ip236.fastwebnet.it [2.237.20.237]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: kholk11) by bali.collaboradmins.com (Postfix) with ESMTPSA id 86B0C17E0808; Thu, 24 Apr 2025 09:24:38 +0200 (CEST) Message-ID: Date: Thu, 24 Apr 2025 09:24:38 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] arm64: dts: mediatek: mt8390-genio-common: Force ssusb2 dual role mode to host To: =?UTF-8?B?TsOtY29sYXMgRi4gUi4gQS4gUHJhZG8=?= , Louis-Alexis Eyraud Cc: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Matthias Brugger , kernel@collabora.com, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org References: <20250331-mtk-genio-510-700-fix-bt-detection-v1-1-34ea2cf137f3@collabora.com> <2da6560b-8444-48ae-bb01-397756cecbc0@notapiano> From: AngeloGioacchino Del Regno Content-Language: en-US In-Reply-To: <2da6560b-8444-48ae-bb01-397756cecbc0@notapiano> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250424_002440_929554_B65E4943 X-CRM114-Status: GOOD ( 26.27 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Il 23/04/25 22:48, Nícolas F. R. A. Prado ha scritto: > On Mon, Mar 31, 2025 at 11:25:52AM +0200, Louis-Alexis Eyraud wrote: >> On the Mediatek Genio 510-EVK and 700-EVK boards, ssusb2 controller is >> one but has two ports: one is routed to the M.2 slot, the other is on >> the RPi header who does support full OTG. >> Since Mediatek Genio 700-EVK USB support was added, dual role mode >> property is set to otg for ssusb2. This config prevents the M.2 >> Wifi/Bluetooth module, present on those boards and exposing Bluetooth >> as an USB device to be properly detected at startup, so configure for >> the ssusb2 dr_mode property as host instead. >> >> Fixes: 1afaeca17238 ("arm64: dts: mediatek: mt8390-genio-700: Add USB, TypeC Controller, MUX") >> Signed-off-by: Louis-Alexis Eyraud >> --- >> I've tested this patch on Mediatek Genio 510-EVK board with a kernel >> based on linux-next (tag: next-20250331). >> --- >> arch/arm64/boot/dts/mediatek/mt8390-genio-common.dtsi | 8 +++++++- >> 1 file changed, 7 insertions(+), 1 deletion(-) >> >> diff --git a/arch/arm64/boot/dts/mediatek/mt8390-genio-common.dtsi b/arch/arm64/boot/dts/mediatek/mt8390-genio-common.dtsi >> index 60139e6dffd8e0e326690d922f3360d829ed026b..3a9d429f0f14b501ae41551dfe7272f242345138 100644 >> --- a/arch/arm64/boot/dts/mediatek/mt8390-genio-common.dtsi >> +++ b/arch/arm64/boot/dts/mediatek/mt8390-genio-common.dtsi >> @@ -1199,7 +1199,13 @@ xhci_ss_ep: endpoint { >> }; >> >> &ssusb2 { >> - dr_mode = "otg"; >> + /* >> + * the ssusb2 controller is one but we got two ports : one is routed >> + * to the M.2 slot, the other is on the RPi header who does support >> + * full OTG but we keep it disabled otherwise the BT on the M.2 slot >> + * USB line goes obviously dead if switching to gadget mode. >> + */ >> + dr_mode = "host"; > > Hi, > > while I agree with this change, now that this controller is fixed to host mode, > the connector child node here which is supposed to probe with driver > usb-conn-gpio, which would monitor the ID and VBUS lines and change the USB role > as needed, will fail to probe with: > > platform 112a1000.usb:connector: deferred probe pending: usb-conn-gpio: failed to get role switch > > as indeed there no longer is a role switch registered. > > For that reason, I believe as part of this commit you should also disable the > connector. Since role switching is no longer supported by this controller, > there's no sense in even trying to probe this driver. > > Thanks, > Nícolas Can we instead go for role-switch-default-mode = "host", with a big comment in the devicetree saying that the controller is shared between BT and the other port? :-) Cheers, Angelo