From patchwork Tue Dec 17 05:28:25 2013 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: 3359061 Return-Path: X-Original-To: patchwork-intel-gfx@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 12B479F32E for ; Tue, 17 Dec 2013 05:20:58 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 1087820173 for ; Tue, 17 Dec 2013 05:20:57 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by mail.kernel.org (Postfix) with ESMTP id 10192200EA for ; Tue, 17 Dec 2013 05:20:56 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 6CC811060ED; Mon, 16 Dec 2013 21:20:53 -0800 (PST) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by gabe.freedesktop.org (Postfix) with ESMTP id D95651060CC for ; Mon, 16 Dec 2013 21:20:39 -0800 (PST) Received: from orsmga002.jf.intel.com ([10.7.209.21]) by orsmga101.jf.intel.com with ESMTP; 16 Dec 2013 21:20:39 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.95,499,1384329600"; d="scan'208";a="453406200" Received: from vkannan-desktop.iind.intel.com ([10.223.25.35]) by orsmga002.jf.intel.com with ESMTP; 16 Dec 2013 21:20:38 -0800 From: Vandana Kannan To: intel-gfx@lists.freedesktop.org Date: Tue, 17 Dec 2013 10:58:25 +0530 Message-Id: <1387258107-19232-4-git-send-email-vandana.kannan@intel.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1387258107-19232-1-git-send-email-vandana.kannan@intel.com> References: <1387258107-19232-1-git-send-email-vandana.kannan@intel.com> Subject: [Intel-gfx] [PATCH 3/5] drm/i915: Add support for DRRS to switch RR X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: intel-gfx-bounces@lists.freedesktop.org Errors-To: intel-gfx-bounces@lists.freedesktop.org X-Spam-Status: No, score=-4.7 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, 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 From: Pradeep Bhat This patch computes and stored 2nd M/N/TU for switching to different refresh rate dynamically. PIPECONF_EDP_RR_MODE_SWITCH bit helps toggle between alternate refresh rates programmed in 2nd M/N/TU registers. Signed-off-by: Pradeep Bhat Signed-off-by: Vandana Kannan --- drivers/gpu/drm/i915/i915_reg.h | 1 + drivers/gpu/drm/i915/intel_dp.c | 109 ++++++++++++++++++++++++++++++++++++++ drivers/gpu/drm/i915/intel_drv.h | 6 ++- 3 files changed, 115 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 3be449d..a52c663 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -3203,6 +3203,7 @@ #define PIPECONF_INTERLACED_DBL_ILK (4 << 21) /* ilk/snb only */ #define PIPECONF_PFIT_PF_INTERLACED_DBL_ILK (5 << 21) /* ilk/snb only */ #define PIPECONF_INTERLACE_MODE_MASK (7 << 21) +#define PIPECONF_EDP_RR_MODE_SWITCH (1 << 20) #define PIPECONF_CXSR_DOWNCLOCK (1<<16) #define PIPECONF_COLOR_RANGE_SELECT (1 << 13) #define PIPECONF_BPC_MASK (0x7 << 5) diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 935b46e..fbf71ed 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -791,6 +791,23 @@ intel_dp_set_clock(struct intel_encoder *encoder, } } +static void +intel_dp_set_m2_n2(struct intel_crtc *crtc, struct intel_link_m_n *m_n) +{ + struct drm_device *dev = crtc->base.dev; + struct drm_i915_private *dev_priv = dev->dev_private; + enum transcoder transcoder = crtc->config.cpu_transcoder; + + if (INTEL_INFO(dev)->gen >= 5 && INTEL_INFO(dev)->gen < 8) { + I915_WRITE(PIPE_DATA_M2(transcoder), + TU_SIZE(m_n->tu) | m_n->gmch_m); + I915_WRITE(PIPE_DATA_N2(transcoder), m_n->gmch_n); + I915_WRITE(PIPE_LINK_M2(transcoder), m_n->link_m); + I915_WRITE(PIPE_LINK_N2(transcoder), m_n->link_n); + } + return; +} + bool intel_dp_compute_config(struct intel_encoder *encoder, struct intel_crtc_config *pipe_config) @@ -894,6 +911,14 @@ found: pipe_config->port_clock, &pipe_config->dp_m_n); + if (dev_priv->edp_downclock_avail && + intel_dp->drrs_state.is_drrs_supported == SEAMLESS_DRRS_SUPPORT) { + intel_link_compute_m_n(bpp, lane_count, + dev_priv->edp_downclock, + pipe_config->port_clock, + &pipe_config->dp_m2_n2); + } + intel_dp_set_clock(encoder, pipe_config, intel_dp->link_bw); return true; @@ -3524,6 +3549,88 @@ intel_dp_init_panel_power_sequencer_registers(struct drm_device *dev, I915_READ(pp_div_reg)); } +void +intel_dp_set_drrs_state(struct drm_device *dev, int refresh_rate) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + struct drm_mode_config *mode_config = &dev->mode_config; + struct intel_encoder *encoder; + struct intel_dp *intel_dp = NULL; + struct intel_crtc_config *config = NULL; + struct intel_crtc *intel_crtc = NULL; + struct intel_connector *intel_connector = NULL; + bool found_edp = false; + u32 reg, val; + int index = 0; + + if (refresh_rate <= 0) { + DRM_INFO("Refresh rate should be positive non-zero.\n"); + goto out; + } + + list_for_each_entry(encoder, &mode_config->encoder_list, base.head) { + if (encoder->type == INTEL_OUTPUT_EDP) { + intel_dp = enc_to_intel_dp(&encoder->base); + intel_crtc = encoder->new_crtc; + if (!intel_crtc) { + DRM_INFO("DRRS: intel_crtc not initialized\n"); + goto out; + } + config = &intel_crtc->config; + intel_connector = intel_dp->attached_connector; + found_edp = true; + break; + } + } + + if (!found_edp) { + DRM_INFO("DRRS supported for eDP only.\n"); + goto out; + } + + if (intel_dp->drrs_state.is_drrs_supported < SEAMLESS_DRRS_SUPPORT) { + DRM_INFO("Seamless DRRS not supported.\n"); + goto out; + } + + if (intel_connector->panel.fixed_mode->vrefresh == refresh_rate) + index = DRRS_HIGH_RR; + else + index = DRRS_LOW_RR; + + if (index == intel_dp->drrs_state.drrs_refresh_rate_type) { + DRM_INFO("DRRS requested for previously set RR...ignoring\n"); + goto out; + } + + if (!intel_crtc->active) { + DRM_INFO("eDP encoder has been disabled. CRTC not Active\n"); + goto out; + } + + mutex_lock(&intel_dp->drrs_state.mutex); + + /* Haswell and below */ + if (INTEL_INFO(dev)->gen >= 5 && INTEL_INFO(dev)->gen < 8) { + reg = PIPECONF(intel_crtc->config.cpu_transcoder); + val = I915_READ(reg); + if (index > DRRS_HIGH_RR) { + val |= PIPECONF_EDP_RR_MODE_SWITCH; + intel_dp_set_m2_n2(intel_crtc, &config->dp_m2_n2); + } else + val &= ~PIPECONF_EDP_RR_MODE_SWITCH; + I915_WRITE(reg, val); + } + + intel_dp->drrs_state.drrs_refresh_rate_type = index; + DRM_INFO("eDP Refresh Rate set to : %dHz\n", refresh_rate); + + mutex_unlock(&intel_dp->drrs_state.mutex); + +out: + return; +} + static void intel_dp_drrs_initialize(struct intel_digital_port *intel_dig_port, struct intel_connector *intel_connector, @@ -3558,6 +3665,8 @@ intel_dp_drrs_initialize(struct intel_digital_port *intel_dig_port, dev_priv->edp_downclock = intel_connector->panel.downclock_mode->clock; + mutex_init(&intel_dp->drrs_state.mutex); + intel_dp->drrs_state.is_drrs_supported = dev_priv->vbt.drrs_mode; diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h index 6ec5f4e..3e4306b 100644 --- a/drivers/gpu/drm/i915/intel_drv.h +++ b/drivers/gpu/drm/i915/intel_drv.h @@ -288,6 +288,9 @@ struct intel_crtc_config { int pipe_bpp; struct intel_link_m_n dp_m_n; + /* m2_n2 for eDP downclock */ + struct intel_link_m_n dp_m2_n2; + /* * Frequence the dpll for the port should run at. Differs from the * adjusted dotclock e.g. for DP or 12bpc hdmi mode. This is also @@ -488,6 +491,7 @@ enum edp_drrs_refresh_rate_type { struct drrs_info { int is_drrs_supported; int drrs_refresh_rate_type; + struct mutex mutex; }; struct intel_dp { @@ -760,7 +764,7 @@ void ironlake_edp_panel_vdd_off(struct intel_dp *intel_dp, bool sync); void intel_edp_psr_enable(struct intel_dp *intel_dp); void intel_edp_psr_disable(struct intel_dp *intel_dp); void intel_edp_psr_update(struct drm_device *dev); - +extern void intel_dp_set_drrs_state(struct drm_device *dev, int refresh_rate); /* intel_dsi.c */ bool intel_dsi_init(struct drm_device *dev);