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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (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 CBB65C5DF74 for ; Tue, 18 Aug 2026 13:46:10 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 7A3AB10E053; Tue, 18 Aug 2026 13:46:10 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b="FeagN1DO"; dkim-atps=neutral Received: from mail-pl1-f181.google.com (mail-pl1-f181.google.com [209.85.214.181]) by gabe.freedesktop.org (Postfix) with ESMTPS id CEF7110E47F for ; Mon, 17 Aug 2026 21:59:10 +0000 (UTC) Received: by mail-pl1-f181.google.com with SMTP id d9443c01a7336-2d032846c95so56872495ad.1 for ; Mon, 17 Aug 2026 14:59:10 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1787003950; x=1787608750; darn=lists.freedesktop.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=x0L46KhTa9nPWpZYUh2/R/sI5c8j4po8w6gNyYy0NNU=; b=FeagN1DO7FcF+xhC+pXGHajDFNUCNHttNrv6si4WTSJgU5B4FbI12SSqohOyiqSXpe Wo9Q4R0e0hycGUrHEJ5G34YnphVwVCQVaEDx5ZZItj6uuYerJKHN864Pa/HPEjmHsPwE u2o9Vno51gP5AcVMtTdWCLnR6mPU6ZxgJ67YTKSlNWZGdbUlEHW/pYqPy5pV+r6j5QHt B3XS8RvN+5IJns4xWZdcpwYhuIU42LlZ28yAXBr0rUxpi9aDLax/4ckbLd4N5ZoTqKIb i9pksSF2e+gIG02MQ3VR1VrqoXpZeiMM2yrT/HX9om4zEDNFR/N7/9H2hH4Uv2+MGXSz 0i5A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1787003950; x=1787608750; 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=x0L46KhTa9nPWpZYUh2/R/sI5c8j4po8w6gNyYy0NNU=; b=ErlwX+bU1s+5mBsB3cV9xXpYTjOCivlMSNhZv37ei3iD/H2ONHWOi9XjbXDtPdxFVg RemXoG6hBjCPts7HJiY4TQC9hCNFhLKgwxQDeFcwO9R81llGMieKRhS70U3ShkyYaczc V9izli9fHRmy79O4Bmim98hQ6fkgqwLCr7G74ovSov4IMs+yRexdiMOLbDTZAslgiYQl ToMLnkc1IwT7pvo2uhs8+GXEYmLlXohh0IWq7lHnwwrIxMiir1+ruxOT37+LciXBZQl4 lUwsJk5lOKoh3ZPofDvNh/zuD6cEzmS6wMck1lAqywMsGQqRLQuL/n14mqsc99mMOqwJ wOZg== X-Gm-Message-State: AOJu0Yz+pauf8Llq01L8ktXp7Mu7FpVE9HPsLJ6Pd33W5iipwDUOSb9E xaTcx5xbA5Pmt8ydVFuw67Y9jrt8ApcMVd46J+ROfNutRoe3Sv6CIrfR X-Gm-Gg: AR+sD12BVqS7lZZEfEqwp1pKcTKE4KrwKorjXYX7z9QvhCIyFxcAzBu3EjeBocC/TrR yvzwdbuv+gZaO3cLxPCOex7jMHnDGYoBysTOC9bcZjCjf6fxthDrIis3XDpOq/c9gPVjjm3IxoJ mB/MOus95fv8/+w4Z05xSIt9nNNDRB93HNvYA6VV2cf6oYqh3zD5uMh9hxuYe8p5R9e/j5JxO9y Z21Oo+Bgd4GiipjVfnvPFY8WLQN4LMIPFez0s0UCBU2mKRRZ3eE5UyVQzae5HYSL3X84AV8LkqF iPS1FZ4lHIICgnublrXoA35ag6yqcXwqa0iPSJTWSleu02mbVjmhnMlfsSVGEbCe9Mtnlv4m+uZ g6Se/QhQgTqDJLIRZVP6hDeBJoS6Y8G+jrCZGC4OXROT5d1GV9n6UygGFmQupcxMsr50eK/CWuS T97ydgO4wCiykrtiFX+c9X4uoZotdhF68Dfgeyv3sTfxafroR/AM2qYxC5k/qAFSUfkvwooaxvN rtt X-Received: by 2002:a05:6a20:6a21:b0:3b4:61f:1fec with SMTP id adf61e73a8af0-3ccda6f2f05mr2853996637.2.1787003950290; Mon, 17 Aug 2026 14:59:10 -0700 (PDT) Received: from LAPTOP-TD60H193.localdomain ([149.19.17.31]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-3267c897e37sm10657970eec.28.2026.08.17.14.59.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 17 Aug 2026 14:59:09 -0700 (PDT) From: Zhefu Zhang To: Chang Jiong , intel-gfx@lists.freedesktop.org Cc: intel-xe@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Ville Syrjala , Gustavo Sousa , Jani Nikula , Rodrigo Vivi Subject: Re: [PATCH v2] drm/i915/cdclk: Don't force cd2x pipe select on Xe3 in bxt_sanitize_cdclk() Date: Tue, 18 Aug 2026 09:59:00 +1200 Message-ID: <20260817215901.459-1-a723356@gmail.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260816062344.796615-1-xspeed1989@gmail.com> References: <20260816062344.796615-1-xspeed1989@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Mailman-Approved-At: Tue, 18 Aug 2026 13:46:09 +0000 X-BeenThere: intel-xe@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel Xe graphics driver List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-xe-bounces@lists.freedesktop.org Sender: "Intel-xe" I hit the same bug independently on a Panther Lake laptop (Xiaomi Book Pro 14 2026, 8086:b080, Xe3_LPD display 30 stepping B0). Arch linux 7.1.8 stock reproduces the corruption with two "CPU pipe A FIFO underrun" errors. With the same change applied on 7.1.8, the panel is clean and the boot log has no FIFO underrun. Also verified the same change on current drm-tip (b801f94c49ffdb0f65e37baf31d68570356d4983): normal panel, no FIFO underrun. Tested-by: Zhefu Zhang