From patchwork Mon Apr 14 04:16:34 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Kandpal, Suraj" X-Patchwork-Id: 14049727 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 48B7FC369B2 for ; Mon, 14 Apr 2025 04:17:39 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 6EB4A10E49C; Mon, 14 Apr 2025 04:17:38 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="ZINEB2yW"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.17]) by gabe.freedesktop.org (Postfix) with ESMTPS id 28FA910E49C; Mon, 14 Apr 2025 04:17:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1744604257; x=1776140257; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=1DSYqLvhL71Dq1J5FVsP3c+LzX+lWgw669dEtaICXU8=; b=ZINEB2yW0qKiWMm2eBi9T6+QJb5EQEH1PggjkMsLNuyo04zWvlqbUgZv /SdIoT7iiJYKl6N6hW4N5RaGQ7zb4C05U8tyBDZP9SOvbTRF43N7slUdW 77FleMGW124L3qwkrq2sjeCZPv7mpi71MxLh4GR7K47bsHKx+V6Ca84CP aYtauZjve4O/yFQeCEROpvakb5U6fOxhxmy3Qp1GeOkMAri+m8AhTiruF usDT4JsKpYqtWjwRb3MSkPdmPFxmtpqy/ZiPsXbp7n3YOBCAWkoO8Ru2u NvqlRZZdNtFc2mx9kmM8g7sdU9JLBHlFl9mLnT7ZyIjOoV/xiEMJtKml/ Q==; X-CSE-ConnectionGUID: egJDZZB0TSK5gTOL8+m+dA== X-CSE-MsgGUID: 7OgZvlYrQDqTvRSQSw5VQA== X-IronPort-AV: E=McAfee;i="6700,10204,11402"; a="46070053" X-IronPort-AV: E=Sophos;i="6.15,211,1739865600"; d="scan'208";a="46070053" Received: from orviesa002.jf.intel.com ([10.64.159.142]) by orvoesa109.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 Apr 2025 21:17:37 -0700 X-CSE-ConnectionGUID: ut9deEPxQeKEQh4xBbxWcg== X-CSE-MsgGUID: V5Dw65RESqaXNPqCLuTX0Q== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.15,211,1739865600"; d="scan'208";a="160658110" Received: from kandpal-x299-ud4-pro.iind.intel.com ([10.190.239.10]) by orviesa002.jf.intel.com with ESMTP; 13 Apr 2025 21:17:35 -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: Mon, 14 Apr 2025 09:46:34 +0530 Message-Id: <20250414041637.128039-11-suraj.kandpal@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250414041637.128039-1-suraj.kandpal@intel.com> References: <20250414041637.128039-1-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 0421b2ed9bd4..4e2caba8311a 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)