From patchwork Mon Apr 22 03:32:55 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Kandpal, Suraj" X-Patchwork-Id: 13637639 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 81B1DC4345F for ; Mon, 22 Apr 2024 03:35:46 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 0E13C1126FD; Mon, 22 Apr 2024 03:35:46 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="gYhnISgJ"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.19]) by gabe.freedesktop.org (Postfix) with ESMTPS id 3B14A1126FC for ; Mon, 22 Apr 2024 03:35:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1713756942; x=1745292942; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=3YiUzbBiCLRxx4Pe3sR4C20DO4Up5PUX6ttKUU//A8A=; b=gYhnISgJAoQo6/s6dnQTC75/Z0Q7LD0v71/Kc7fJVAZu2x9wXFBnfvtT mV6tVyRDjljrXQNVnU9XUK8r0rbFuujRKokQS9VMSpSuroSF8TZ86EcbD XfbVZ7iUeUc6uSCFfvl1Hov/C93mG6J8lT2n0uWYC5jAI+5Y8pioEc+Zg WnaebC7rBNACLzSJF3zn3zkfsG2mdzUyBy7R/3CPSE41HEjM9J29VLAjz 1YVBGM9TTrFd2JvF+6NO8sdK6+nYe7lUjVpYigm7m21wRf0UlC7GH6diU IBbsMl6sbFM7Luuv7NsCQJbbEFaVE+1oJSK6IngXhr8YY8jNCVtCI6vVd g==; X-CSE-ConnectionGUID: qR551EA4SWeo5Wy1F0Hhgw== X-CSE-MsgGUID: K2rRghK1Sg+FWenu/Xgzvg== X-IronPort-AV: E=McAfee;i="6600,9927,11051"; a="9158255" X-IronPort-AV: E=Sophos;i="6.07,219,1708416000"; d="scan'208";a="9158255" Received: from fmviesa009.fm.intel.com ([10.60.135.149]) by orvoesa111.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 21 Apr 2024 20:35:42 -0700 X-CSE-ConnectionGUID: iVbpMLsNQTGAMLGZGxvL2A== X-CSE-MsgGUID: yvYjkit5QBCBsAW+z1QDvQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.07,219,1708416000"; d="scan'208";a="23907414" Received: from kandpal-x299-ud4-pro.iind.intel.com ([10.190.239.32]) by fmviesa009.fm.intel.com with ESMTP; 21 Apr 2024 20:35:40 -0700 From: Suraj Kandpal To: intel-gfx@lists.freedesktop.org Cc: chaitanya.kumar.borah@intel.com, uma.shankar@intel.com, ankit.k.nautiyal@intel.com, arun.r.murthy@intel.com, naveen1.kumar@intel.com, sebastian.wick@redhat.com, Suraj Kandpal Subject: [PATCH 6/6] drm/i915/dp: Write panel override luminance values Date: Mon, 22 Apr 2024 09:02:55 +0530 Message-ID: <20240422033256.713902-7-suraj.kandpal@intel.com> X-Mailer: git-send-email 2.43.2 In-Reply-To: <20240422033256.713902-1-suraj.kandpal@intel.com> References: <20240422033256.713902-1-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" Write panel override luminance values which helps the TCON decide if tone mapping needs to be enabled or not. Signed-off-by: Suraj Kandpal --- .../drm/i915/display/intel_dp_aux_backlight.c | 25 +++++++++++++++++++ 1 file changed, 25 insertions(+) diff --git a/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c b/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c index e23694257ea5..9e885eb40805 100644 --- a/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c +++ b/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c @@ -374,6 +374,29 @@ static const char *dpcd_vs_pwm_str(bool aux) return aux ? "DPCD" : "PWM"; } +static void +intel_dp_aux_write_panel_luminance_override(struct intel_connector *connector) +{ + struct drm_i915_private *i915 = to_i915(connector->base.dev); + struct intel_panel *panel = &connector->panel; + struct intel_dp *intel_dp = enc_to_intel_dp(connector->encoder); + int ret; + u8 buf[4] = {}; + + buf[0] = panel->backlight.min & 0xFF; + buf[1] = (panel->backlight.min & 0xFF00) >> 8; + buf[2] = panel->backlight.max & 0xFF; + buf[3] = (panel->backlight.max & 0xFF00) >> 8; + + ret = drm_dp_dpcd_write(&intel_dp->aux, + INTEL_EDP_HDR_PANEL_LUMINANCE_OVERRIDE, + buf, sizeof(buf)); + if (ret < 0) + drm_dbg_kms(&i915->drm, + "Panel Luminance DPCD reg write failed, err:-%d\n", + ret); +} + static int intel_dp_aux_hdr_setup_backlight(struct intel_connector *connector, enum pipe pipe) { @@ -405,6 +428,8 @@ intel_dp_aux_hdr_setup_backlight(struct intel_connector *connector, enum pipe pi panel->backlight.min = 0; } + intel_dp_aux_write_panel_luminance_override(connector); + drm_dbg_kms(&i915->drm, "[CONNECTOR:%d:%s] Using AUX HDR interface for backlight control (range %d..%d)\n", connector->base.base.id, connector->base.name, panel->backlight.min, panel->backlight.max);