From patchwork Fri Apr 11 04:29:06 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Kandpal, Suraj" X-Patchwork-Id: 14047531 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 54E8DC369A8 for ; Fri, 11 Apr 2025 04:29:30 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id B6BBC10EAD6; Fri, 11 Apr 2025 04:29:29 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="VUOhhUwY"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.12]) by gabe.freedesktop.org (Postfix) with ESMTPS id 8B38A10EAD7; Fri, 11 Apr 2025 04:29:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1744345769; x=1775881769; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=tbNhe/Pi2ICeJWB/Eoicw5OlExaShCsV3D27EkfxHHI=; b=VUOhhUwYlGNAlYoPPXmhl1hZMRfkLm5DYnrglbdDxppTZ5iZDFMMlwMB f/AoQQeMbIZPJmZObNanUwks1Xs1yCCvlmlEAyHP7HNvT1JQ9nmhrQMgz O6+OHJ40qxSKc9imxOPiLvnAH45meQhqpKHFwwUNoQy+/23ZELww4TQX+ 1DTb8aofMYdeEoydEUQ3qnx9iv1V+IWsta5v8VXtepZgb75zc4UG8CAWv mxxLTfcrQLymB5HDMWEWFjGfEreEtHK5OcCV8z410SvZzE6mAegHp9SW6 YfAiz8TMeMGjOBLwL8MAq0HrWWBYtQmGDM+plbn2T8ufpVDo5KIy2YKPO g==; X-CSE-ConnectionGUID: euWjqpTxTBS+gQCZDAd23w== X-CSE-MsgGUID: V0cbhq/HQFCy4TMo/39F/A== X-IronPort-AV: E=McAfee;i="6700,10204,11400"; a="57259952" X-IronPort-AV: E=Sophos;i="6.15,203,1739865600"; d="scan'208";a="57259952" Received: from orviesa002.jf.intel.com ([10.64.159.142]) by orvoesa104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 10 Apr 2025 21:29:29 -0700 X-CSE-ConnectionGUID: wt56ThlpTgSwmD7k29zB9w== X-CSE-MsgGUID: KJvm/AcRSEWTstzJdL2r7g== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.15,203,1739865600"; d="scan'208";a="160057100" Received: from kandpal-x299-ud4-pro.iind.intel.com ([10.190.239.10]) by orviesa002.jf.intel.com with ESMTP; 10 Apr 2025 21:29:26 -0700 From: Suraj Kandpal To: nouveau@lists.freedesktop.org, dri-devel@lists.freedesktop.org, intel-xe@lists.freedesktop.org, intel-gfx@lists.freedesktop.org Cc: ankit.k.nautiyal@intel.com, arun.r.murthy@intel.com, Suraj Kandpal Subject: [PATCH 10/13] drm/dp: Enable backlight control using luminance Date: Fri, 11 Apr 2025 09:59:06 +0530 Message-Id: <20250411042909.2626807-11-suraj.kandpal@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250411042909.2626807-1-suraj.kandpal@intel.com> References: <20250411042909.2626807-1-suraj.kandpal@intel.com> MIME-Version: 1.0 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" Add flag to enable brightness control via luminance value when enabling edp backlight. Signed-off-by: Suraj Kandpal --- drivers/gpu/drm/display/drm_dp_helper.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/display/drm_dp_helper.c b/drivers/gpu/drm/display/drm_dp_helper.c index 0a2ec1147006..b204ed48976d 100644 --- a/drivers/gpu/drm/display/drm_dp_helper.c +++ b/drivers/gpu/drm/display/drm_dp_helper.c @@ -4030,6 +4030,9 @@ int drm_edp_backlight_enable(struct drm_dp_aux *aux, const struct drm_edp_backli else dpcd_buf = DP_EDP_BACKLIGHT_CONTROL_MODE_PWM; + if (bl->luminance_set) + dpcd_buf |= DP_EDP_PANEL_LUMINANCE_CONTROL_ENABLE; + if (bl->pwmgen_bit_count) { ret = drm_dp_dpcd_write_byte(aux, DP_EDP_PWMGEN_BIT_COUNT, bl->pwmgen_bit_count); if (ret < 0)