From patchwork Fri Dec 29 01:38:23 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ivan Hu X-Patchwork-Id: 1880957 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=lists.ubuntu.com (client-ip=185.125.189.65; helo=lists.ubuntu.com; envelope-from=kernel-team-bounces@lists.ubuntu.com; receiver=patchwork.ozlabs.org) Received: from lists.ubuntu.com (lists.ubuntu.com [185.125.189.65]) (using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4T1ShV4lHZz1ydd for ; Fri, 29 Dec 2023 12:38:49 +1100 (AEDT) Received: from localhost ([127.0.0.1] helo=lists.ubuntu.com) by lists.ubuntu.com with esmtp (Exim 4.86_2) (envelope-from ) id 1rJ1pa-00065A-7q; Fri, 29 Dec 2023 01:38:34 +0000 Received: from smtp-relay-canonical-1.internal ([10.131.114.174] helo=smtp-relay-canonical-1.canonical.com) by lists.ubuntu.com with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.86_2) (envelope-from ) id 1rJ1pX-00064w-32 for kernel-team@lists.ubuntu.com; Fri, 29 Dec 2023 01:38:31 +0000 Received: from canonical.com (unknown [10.101.194.164]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-256) server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by smtp-relay-canonical-1.canonical.com (Postfix) with ESMTPSA id 30BCA3F6B9 for ; Fri, 29 Dec 2023 01:38:28 +0000 (UTC) From: Ivan Hu To: kernel-team@lists.ubuntu.com Subject: [PATCH 0/1][SRU][J] Add quirk to disable i915 fastboot on B&R PC Date: Fri, 29 Dec 2023 09:38:23 +0800 Message-Id: <20231229013824.7215-1-ivan.hu@canonical.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-BeenThere: kernel-team@lists.ubuntu.com X-Mailman-Version: 2.1.20 Precedence: list List-Id: Kernel team discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: kernel-team-bounces@lists.ubuntu.com Sender: "kernel-team" BugLink: https://bugs.launchpad.net/bugs/2047630 [Impact] Some displays connect to the B&R PC device got the garbled display [Fix] The issue will disappear after commit 5ac860cc52540df8bca27e0bb25b6744df67e8f0, but these patches cannot be backported from 5.19 to 5.15. So add quirk to force disable the i915 fastboot on the device to fix the abnormal display [Test Case] 1. Connect the display and power on the B&R PC device 2. Check the display for boot up [Where problems could occur] Quirk only on the B&R PCs. Risk of regression is low Ivan Hu (1): i915: force disable fastboot quirk drivers/gpu/drm/i915/display/intel_display.c | 3 +++ drivers/gpu/drm/i915/display/intel_quirks.c | 25 ++++++++++++++++++++ drivers/gpu/drm/i915/i915_drv.h | 1 + 3 files changed, 29 insertions(+) Acked-by: Jose Ogando Acked-by: Manuel Diewald