From patchwork Wed Dec 10 20:52:51 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: vandana.kannan@intel.com X-Patchwork-Id: 5472051 Return-Path: X-Original-To: patchwork-intel-gfx@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 57E5EBEEA8 for ; Wed, 10 Dec 2014 20:35:37 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 7FABD201BB for ; Wed, 10 Dec 2014 20:35:36 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by mail.kernel.org (Postfix) with ESMTP id 9D2222017D for ; Wed, 10 Dec 2014 20:35:35 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 2A3B66E0F2; Wed, 10 Dec 2014 12:35:35 -0800 (PST) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) by gabe.freedesktop.org (Postfix) with ESMTP id D7EF16E0F2 for ; Wed, 10 Dec 2014 12:35:33 -0800 (PST) Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga102.fm.intel.com with ESMTP; 10 Dec 2014 12:35:33 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.07,553,1413270000"; d="scan'208";a="645655840" Received: from vkannan-desktop.iind.intel.com ([10.223.25.137]) by fmsmga002.fm.intel.com with ESMTP; 10 Dec 2014 12:35:32 -0800 From: Vandana Kannan To: intel-gfx@lists.freedesktop.org Date: Thu, 11 Dec 2014 02:22:51 +0530 Message-Id: <1418244777-4964-3-git-send-email-vandana.kannan@intel.com> X-Mailer: git-send-email 2.0.1 In-Reply-To: <1418244777-4964-1-git-send-email-vandana.kannan@intel.com> References: <1418244777-4964-1-git-send-email-vandana.kannan@intel.com> Subject: [Intel-gfx] [PATCH 2/8] drm/i915: Initialize DRRS delayed work X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add DRRS work function to trigger a switch to low refresh rate when activity is detected on screen. Signed-off-by: Vandana Kannan --- drivers/gpu/drm/i915/intel_dp.c | 36 ++++++++++++++++++++++++++++-------- 1 file changed, 28 insertions(+), 8 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 96d8e17..ef8b55d 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -4814,20 +4814,38 @@ static void intel_dp_set_drrs_state(struct drm_device *dev, int refresh_rate) I915_WRITE(reg, val); } + dev_priv->drrs.refresh_rate_type = index; + + DRM_DEBUG_KMS("eDP Refresh Rate set to : %dHz\n", refresh_rate); +} + +static void intel_edp_drrs_work(struct work_struct *work) +{ + struct drm_i915_private *dev_priv = + container_of(work, typeof(*dev_priv), drrs.work.work); + struct intel_dp *intel_dp = dev_priv->drrs.dp; + + mutex_lock(&dev_priv->drrs.mutex); + + if (!intel_dp) + goto unlock; + /* - * mutex taken to ensure that there is no race between differnt - * drrs calls trying to update refresh rate. This scenario may occur - * in future when idleness detection based DRRS in kernel and - * possible calls from user space to set differnt RR are made. + * The delayed work can race with an invalidate hence we need to + * recheck. */ - mutex_lock(&dev_priv->drrs.mutex); + if (dev_priv->drrs.busy_frontbuffer_bits) + goto unlock; - dev_priv->drrs.refresh_rate_type = index; + if (dev_priv->drrs.refresh_rate_type != DRRS_LOW_RR) + intel_dp_set_drrs_state(dev_priv->dev, + intel_dp->attached_connector->panel. + downclock_mode->vrefresh); - mutex_unlock(&dev_priv->drrs.mutex); +unlock: - DRM_DEBUG_KMS("eDP Refresh Rate set to : %dHz\n", refresh_rate); + mutex_unlock(&dev_priv->drrs.mutex); } static struct drm_display_mode * @@ -4857,6 +4875,8 @@ intel_dp_drrs_init(struct intel_connector *intel_connector, return NULL; } + INIT_DELAYED_WORK(&dev_priv->drrs.work, intel_edp_drrs_work); + mutex_init(&dev_priv->drrs.mutex); dev_priv->drrs.type = dev_priv->vbt.drrs_type;