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 X-Spam-Level: X-Spam-Status: No, score=-6.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 80432C2D0EA for ; Wed, 8 Apr 2020 07:23:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 53B202072A for ; Wed, 8 Apr 2020 07:23:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726873AbgDHHXO (ORCPT ); Wed, 8 Apr 2020 03:23:14 -0400 Received: from mga07.intel.com ([134.134.136.100]:59904 "EHLO mga07.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726627AbgDHHXO (ORCPT ); Wed, 8 Apr 2020 03:23:14 -0400 IronPort-SDR: zXcfL6zgi8L105m1vMKwiHnkcUQmTm8+wmKkWXogQ+qCZr2SrqDfKq2OW2oHVznLEUUlcAGtd1 KLUE7eBICAGA== X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga004.jf.intel.com ([10.7.209.38]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 Apr 2020 00:23:13 -0700 IronPort-SDR: wbNSLqrG9YH/WEuK3RhT2/b2jaChlUH8aGF188QgLpZkAWUXWTDZRQ1kJN6f2krch4WwzGgGWF ypbPpiqp0B4g== X-IronPort-AV: E=Sophos;i="5.72,357,1580803200"; d="scan'208";a="398121561" Received: from slinke-mobl.ger.corp.intel.com (HELO localhost) ([10.252.60.237]) by orsmga004-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 Apr 2020 00:23:10 -0700 From: Jani Nikula To: Kai-Heng Feng , maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, airlied@linux.ie, daniel@ffwll.ch Cc: Kai-Heng Feng , open list , "open list\:DRM DRIVERS" Subject: Re: [PATCH] drm/i915: Force DPCD backlight mode for HP CML 2020 system In-Reply-To: <20200407075353.12747-1-kai.heng.feng@canonical.com> Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo References: <20200407075353.12747-1-kai.heng.feng@canonical.com> Date: Wed, 08 Apr 2020 10:23:07 +0300 Message-ID: <87k12qigpw.fsf@intel.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 07 Apr 2020, Kai-Heng Feng wrote: > There's another Samsung OLED panel needs to use DPCD aux interface to > control backlight. Acked-by: Jani Nikula > > Signed-off-by: Kai-Heng Feng > --- > drivers/gpu/drm/drm_dp_helper.c | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c > index c6fbe6e6bc9d..d0cfee3b7a65 100644 > --- a/drivers/gpu/drm/drm_dp_helper.c > +++ b/drivers/gpu/drm/drm_dp_helper.c > @@ -1299,6 +1299,8 @@ static const struct edid_quirk edid_quirk_list[] = { > * only supports DPCD backlight controls > */ > { MFG(0x4c, 0x83), PROD_ID(0x41, 0x41), BIT(DP_QUIRK_FORCE_DPCD_BACKLIGHT) }, > + /* HP CML 2020 system */ > + { MFG(0x4c, 0x83), PROD_ID(0x45, 0x41), BIT(DP_QUIRK_FORCE_DPCD_BACKLIGHT) }, > /* > * Some Dell CML 2020 systems have panels support both AUX and PWM > * backlight control, and some only support AUX backlight control. All -- Jani Nikula, Intel Open Source Graphics Center