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 9904FCCA46C for ; Fri, 16 Oct 2026 23:51:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: 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=65v4nN2oxfIAlatLQGr2dMhec1mjB5urR+aYdQ03x7U=; b=RtCiO6boBTPOKn sjIF7Okgbx1dYHUe9Ew4y8iuE3RJWmBrZ24AAcZJsybVF1edVSsmpR72yB+M+Y0URMhPW3qVDT4ZL 3n3kuw/Ci6FJvT+CaJTsTLq6Vpk+wewzzZXMPB1m2k1kwmmBpMzF5MY4cDWxFAThOyQkAu4TLBLu4 /Qt4f3f5DV6yJmwDU/LoP5HLgRAhi3BRj/RmYAOO0qULAZNZwUzq7r0AzeqqNStK2tETIkaiq+EZH W+C+968Woxgqwv+ciIUAkGr/DAun3M7QkwGGEkKvbe0iNYNCf2xzGnwRRckg6ho2FfCw68z+rtR5b lkuysIcQinkoUw11ve4A==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1xHri0-00000004DXI-3QTx; Fri, 16 Oct 2026 23:51:32 +0000 Received: from mail-106112.protonmail.ch ([79.135.106.112]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1xHrhv-00000004DWr-0NSf for linux-phy@lists.infradead.org; Fri, 16 Oct 2026 23:51:31 +0000 X-Pm-Submission-Id: 4j61t63Qr8z2ScWl From: Luke Macken To: ritesh.kumar@oss.qualcomm.com, nabige.aala@oss.qualcomm.com Cc: vkoul@kernel.org, neil.armstrong@linaro.org, mani@kernel.org, manivannan.sadhasivam@oss.qualcomm.com, abelvesa@kernel.org, abel.vesa@oss.qualcomm.com, dmitry.baryshkov@oss.qualcomm.com, lumag@kernel.org, konrad.dybcio@oss.qualcomm.com, johan+linaro@kernel.org, wesley.cheng@oss.qualcomm.com, mahadevan.p@oss.qualcomm.com, quic_bjorande@quicinc.com, linux-arm-msm@vger.kernel.org, linux-phy@lists.infradead.org, linux-kernel@vger.kernel.org, Luke Macken Subject: Re: [PATCH v5 00/11] phy: qualcomm: qmp-combo: update DP PHY PLL programming on Glymur Date: Fri, 16 Oct 2026 17:50:50 -0600 Message-ID: <20261016235050.4060422-1-luke@phorex.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20261001-glymur-phy-v3-v5-0-3848c2615d5a@oss.qualcomm.com> References: <20261001-glymur-phy-v3-v5-0-3848c2615d5a@oss.qualcomm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20261016_165127_282265_2008DFE5 X-CRM114-Status: UNSURE ( 4.60 ) 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 Tested on a Lenovo ThinkPad T14s Gen 7 (Mahua / Snapdragon X2 Elite, which uses the qcom,glymur-qmp-usb3-dp-phy compatible) with linux-next next-20261013 plus this series: external DisplayPort over USB-C works, Dell U3818DW at 3840x1600@60 over HBR2 x4, and the internal eDP panel keeps working. Tested-by: Luke Macken One data point in case it is useful: without the series, link training on this machine already succeeds at HBR2 x4, DPCD 0x202-0x205 read 77 77 01 01 and the symbol error counters stay at zero, but no picture is produced. The DPU interface frame counter runs at 30 fps for the 60 Hz mode and the sink's TEST_CRC count stays at zero, which is consistent with the DP pixel clock running at half the requested rate. With the series the frame counter runs at 60 fps and the sink returns a CRC, with the unchanged 5400000000 / 4 in qmp_v8_configure_dp_clocks(). The same half-rate symptom was also seen without the series at 2 lanes. -- linux-phy mailing list linux-phy@lists.infradead.org https://lists.infradead.org/mailman/listinfo/linux-phy