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 9A38AC79FA0 for ; Mon, 7 Sep 2026 18:13:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=MVJOJ0AZsH83hksLTIOY/Rs205jIjpxTUQqxi+T3s0g=; b=yVsZUpPed7/DcL xzFvgFYOpVByT6UTqOueczX6qK7XO7KMG8Hpm1yoF6yTRvmUvnV3ledhDv+Sih/3Mmal459ccV5g3 hyPf/YTrqko85+bYvioN7N5Jikc8Ct8QQkZ+em98leEaXwUpKczrplkjqAdM3QyT7hiWCL/jQJOij yxqAd5Psk0gLGMnqHwZlnHL8pYvKcq/0Idw3dEOKPu2S4HT7c9q02yz8aRDu3Iqr2LGramgXii9KQ PhVQFMkrXiAbSUVePNdWgdOb4seuojLA7OOSv2g8kK0IG7rJdi9iNPqlLgFtRKuPz2B3lW5QQdmSu psjVdl5Jo5LfmZ1sinsw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1x3dqV-00000007Ypp-3ZkG; Mon, 07 Sep 2026 18:13:31 +0000 Received: from mail-qv1-xf2f.google.com ([2607:f8b0:4864:20::f2f]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1x3dqS-00000007Yp2-0Emv for linux-phy@lists.infradead.org; Mon, 07 Sep 2026 18:13:29 +0000 Received: by mail-qv1-xf2f.google.com with SMTP id 6a1803df08f44-90e9ad1a373so51160276d6.0 for ; Mon, 07 Sep 2026 11:13:27 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1788804806; x=1789409606; darn=lists.infradead.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to:content-type; bh=qE1cFGUPU2WBN+CugW9PSSVbaWhX+WvGyXn9/fVdNR0=; b=FTRFXSVbK0FRVUzFEhBdyVrdt5W4hfjLSZHPcbBxlH8fpdFNGueVhj3UQvK6pwUpkL U7U38kSDK7sBJ0A5KadPZ/MNSYrqtBvTFpOTWtjcOXYU4Fp1Fl2YuH/znOtQuWfWit9J n4ySjPXNfoopZdVhSW1edigj6PAevXPLHtTICagB1AIKsSdUVQB33xBRhGFhJA0/6Sc7 2CJTq9BFowLZ7gUpgC0VPzpxnu5KEh9ELIys/+5y75bV+Q91w0hSlZvYXizuGJ0Ohy0f Mm5OWBXnytimQr8hIlIQRPEOtFA5Nl3reGFbfLxISyiRz1cfNhYOReC3dPnj3JPDqgja uE0g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1788804806; x=1789409606; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to:content-type; bh=qE1cFGUPU2WBN+CugW9PSSVbaWhX+WvGyXn9/fVdNR0=; b=hQo8934c5w+WkpARLbsYHa534z/dzoRCKcOAYQUR5lN7k8X0lk8N0i+UgFjAfXBwBY ejQyEpNwBFZxgzt0bQhA/v+1w+2Y5AWSn11kdnFfPMnSIVAM/CtsfiU4bJJWG5r8oVWh eH0ZSCSKPrvkE7K+kDULT21swe3TwpAGo4IxTv0s/JODSmQXBr2Pbo5tIEwJi3V64QNJ hwWBMoAJZnn2aMq8YRrKME2J0RCNLab8mjcJham/IEgQfccsokmdUA4vHsa1nbJvWNFj WAccLijBm5/NhphXTM1hTBVCDwoG/fESxz1NfNyYNuBE/OXB+XJX8idVY9xt9NOZQ+qJ QdLg== X-Forwarded-Encrypted: i=1; AKwUvBx4dbSdP8P6NhBL1Xp0xpPJyqm71ugdKoB4NjnFRisSotRJcIJgUCZenNNTuGObMzjk88g5r6lrCzE=@lists.infradead.org X-Gm-Message-State: AFuF++klbM7acuD9BwBpaZsniihCdF1xlyHBcayY9Hp0SqVMRZW6zEil J2ZK0B+U/mIxw9BOTJJeCFaj1s7wYKYsXJ5HkIc8sn1d4g9pruL6oG9T X-Gm-Gg: AYBFou3mgO28bNmCZzkDLDHkJiH7TGvBE+Vfvj0K7jMPwDn7XxXHWcSPJTn0w+PBme9 aO3r5/GMmK3jqydEW1DTRgxfqIxBPokkumPKbMqCslxI78msgbRjFCds0AP1yiSzViihOfCGBWu PvRO5dOnOkIY0p/PUN2VQcCM8DCQFlGFlY7i22+pqWUPLrW0hXz7ABQNllVRZUEGvE/0kARCSoQ 4T/+K5r/ho1MW6hJDDhRoopHqGO+r9q9Q4e1Bv5gTWMqc8tRzG10auGbF3A9hWwrgvGwTzYR+gd bZsPCTKjLoO0Bur+VBSLwBt/kElEa3L+pDNUgP2lMnotnFG+Ty275bMP//ABTFYBm0wgULOjDkl b9uGZINg9j+Xm29xYnD9MTHkVNHq2zFQC8YPwF0Cj2LFJlPTkfiZVIh6rK0kzd26UnrCZV2zggt 44DkQqxcfeSmDdsFn49V2Zp2KX12CEff4ESR8zHSRIo+ZHuvyOu/9otRjc4SLmIqWCH3uInJy/0 tKJZw== X-Received: by 2002:a05:6214:acf:b0:910:3923:cc6b with SMTP id 6a1803df08f44-9103923d142mr240278646d6.20.1788804806567; Mon, 07 Sep 2026 11:13:26 -0700 (PDT) Received: from localhost ([35.11.35.209]) by smtp.gmail.com with ESMTPSA id 6a1803df08f44-910406bbb79sm97374976d6.47.2026.09.07.11.13.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Sep 2026 11:13:26 -0700 (PDT) From: BurningHoryd To: Neil Armstrong , Dmitry Baryshkov Cc: linux-arm-msm@vger.kernel.org, linux-phy@lists.infradead.org, dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org, Vinod Koul , Abhinav Kumar , Heikki Krogerus Subject: Re: SM8250 USB-C DP alt mode: DP AUX times out in reversed (CC2) cable orientation Date: Mon, 7 Sep 2026 14:13:25 -0400 Message-ID: <20260907181325.89746-1-sjunhyuk1@gmail.com> X-Mailer: git-send-email 2.55.0 In-Reply-To: References: <20260906225206.2994952-1-sjunhyuk1@gmail.com> <20260907162643.36585-1-sjunhyuk1@gmail.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260907_111328_713417_4B2ED95B X-CRM114-Status: UNSURE ( 8.35 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-phy@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux Phy Mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-phy" Errors-To: linux-phy-bounces+linux-phy=archiver.kernel.org@lists.infradead.org On 9/7/26 18:35, Neil Armstrong wrote: > Yes if it's a discrete SBU mux, gpio-sbu-mux was designed for that, and > keep the nb7vpq904m and just drop the SBU link to the redriver and replace > it with a link to the SBU mux instead. That fixed it. A gpio-sbu-mux node on TLMM 8 (select) / TLMM 9 (enable), the connector's SBU graph endpoint moved from the nb7vpq904m to it, and the nb7vpq904m's enable-gpios dropped (TLMM 9 is the mux enable, not the redriver enable). nb7vpq904m stays as the SS retimer-switch. Reversed orientation now brings DP up reliably - one normal plug and three reversed re-plugs, all four train to 4 lanes and stay connected, no more DPCD read timeout. Normal orientation is unchanged. This board (Retroid Pocket 5) isn't upstream yet, so the fix lands downstream for now, but thanks a lot for the quick pointer - "nb7vpq904m alone doesn't switch SBU" was exactly the piece I was missing. BurningHoryd -- linux-phy mailing list linux-phy@lists.infradead.org https://lists.infradead.org/mailman/listinfo/linux-phy