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 4A2EA105F7A2 for ; Fri, 13 Mar 2026 12:22:14 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 162F610EBCC; Fri, 13 Mar 2026 12:22:13 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="Km33f4II"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.13]) by gabe.freedesktop.org (Postfix) with ESMTPS id 3FFEB10EBC9; Fri, 13 Mar 2026 12:22:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1773404531; x=1804940531; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=lgdfMu+HtA7xAd10zI4IF3HYREpPW30Wtwm/Ue0b1qo=; b=Km33f4IIZZo4mXUJ4oKmHZvuftYZOBPwk0WfgZA5x1LcWVIrG+Quxadx s4NmtKArwqx5Z+6Bi7PDsTuKdS+h4wFHT368bs+GWMjB65w7CSiPSKLHP LbAIFHe1Mc+Hm6Wra7xpl2pkKZaw/Dv5ZuRHyf2KTv2IpuVm4RqAWOAnU jbd8yXtOXJTO28krPSmxh5n4TeAeMZjoMD7NkJbuOHjkUDIJmHwFbMMmS 4AdegxpS206HawP0U+vZIld+yZbmU+gvWIY+qP85h0k25nRP/YXAwCZ+g 4FH+QDBiyJwh8Vsj9Qx9OrrZ7XVNyV7UYTeP8AiL4RDMHZShMLinBqHx7 w==; X-CSE-ConnectionGUID: SpiEMaqJRIm2uCnE9o4+ow== X-CSE-MsgGUID: C48CUYv+Ry2sabhDkAvoSw== X-IronPort-AV: E=McAfee;i="6800,10657,11727"; a="77116939" X-IronPort-AV: E=Sophos;i="6.23,118,1770624000"; d="scan'208";a="77116939" Received: from orviesa003.jf.intel.com ([10.64.159.143]) by fmvoesa107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 Mar 2026 05:22:11 -0700 X-CSE-ConnectionGUID: Sndr6oCeQo6dN48yS+JgLQ== X-CSE-MsgGUID: df31+eVQTBCanbr5xw7JvQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.23,118,1770624000"; d="scan'208";a="225269256" Received: from amilburn-desk.amilburn-desk (HELO jhogande-mobl3.intel.com) ([10.245.245.196]) by ORVIESA003-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 Mar 2026 05:22:10 -0700 From: =?UTF-8?q?Jouni=20H=C3=B6gander?= To: intel-gfx@lists.freedesktop.org, intel-xe@lists.freedesktop.org Cc: dri-devel@lists.freedesktop.org, =?UTF-8?q?Jouni=20H=C3=B6gander?= Subject: [PATCH 1/2] drm/dp: Add quirk to disable Panel Replay on certain panels Date: Fri, 13 Mar 2026 14:21:44 +0200 Message-ID: <20260313122145.1747175-2-jouni.hogander@intel.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260313122145.1747175-1-jouni.hogander@intel.com> References: <20260313122145.1747175-1-jouni.hogander@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo Content-Transfer-Encoding: 8bit X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" We are currently observing problems with LG panel when Panel Replay is enabled. Add new quirk DP_DPCD_QUIRK_NO_PANEL_REPLAY and set it for the problematic panel model. Signed-off-by: Jouni Högander --- drivers/gpu/drm/display/drm_dp_helper.c | 2 ++ include/drm/display/drm_dp_helper.h | 8 ++++++++ 2 files changed, 10 insertions(+) diff --git a/drivers/gpu/drm/display/drm_dp_helper.c b/drivers/gpu/drm/display/drm_dp_helper.c index a697cc227e28..96c8b53ba4e4 100644 --- a/drivers/gpu/drm/display/drm_dp_helper.c +++ b/drivers/gpu/drm/display/drm_dp_helper.c @@ -2540,6 +2540,8 @@ static const struct dpcd_quirk dpcd_quirk_list[] = { { OUI(0x00, 0x22, 0xb9), DEVICE_ID_ANY, true, BIT(DP_DPCD_QUIRK_CONSTANT_N) }, /* LG LP140WF6-SPM1 eDP panel */ { OUI(0x00, 0x22, 0xb9), DEVICE_ID('s', 'i', 'v', 'a', 'r', 'T'), false, BIT(DP_DPCD_QUIRK_CONSTANT_N) }, + /* Problems observed with LG panel */ + { OUI(0x00, 0x22, 0xb9), DEVICE_ID_ANY, false, BIT(DP_DPCD_QUIRK_NO_PANEL_REPLAY) }, /* Apple panels need some additional handling to support PSR */ { OUI(0x00, 0x10, 0xfa), DEVICE_ID_ANY, false, BIT(DP_DPCD_QUIRK_NO_PSR) }, /* CH7511 seems to leave SINK_COUNT zeroed */ diff --git a/include/drm/display/drm_dp_helper.h b/include/drm/display/drm_dp_helper.h index 1d0acd58f486..ca36b5a9c1b6 100644 --- a/include/drm/display/drm_dp_helper.h +++ b/include/drm/display/drm_dp_helper.h @@ -824,6 +824,14 @@ enum drm_dp_quirk { * driver still need to implement proper handling for such device. */ DP_DPCD_QUIRK_NO_PSR, + /** + * @DP_DPCD_QUIRK_NO_PANEL_REPLAY: + * + * The device does not support Panel Replay even if reports + * that it supports or driver still need to implement proper + * handling for such device. + */ + DP_DPCD_QUIRK_NO_PANEL_REPLAY, /** * @DP_DPCD_QUIRK_NO_SINK_COUNT: * -- 2.43.0