From mboxrd@z Thu Jan 1 00:00:00 1970 From: Vandana Kannan Subject: [PATCH 2/5] drm/i915: Parse EDID probed modes for DRRS support Date: Fri, 14 Feb 2014 15:32:19 +0530 Message-ID: <1392372142-16905-3-git-send-email-vandana.kannan@intel.com> References: <1392372142-16905-1-git-send-email-vandana.kannan@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mga09.intel.com (mga09.intel.com [134.134.136.24]) by gabe.freedesktop.org (Postfix) with ESMTP id 26006FB4A2 for ; Fri, 14 Feb 2014 01:52:15 -0800 (PST) In-Reply-To: <1392372142-16905-1-git-send-email-vandana.kannan@intel.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: intel-gfx-bounces@lists.freedesktop.org Errors-To: intel-gfx-bounces@lists.freedesktop.org To: intel-gfx@lists.freedesktop.org List-Id: intel-gfx@lists.freedesktop.org From: Pradeep Bhat This patch and finds out the lowest refresh rate supported for the resolution same as the fixed_mode, based on the implementaion find_panel_downclock. It also checks the VBT fields to see if panel supports seamless DRRS or not. Based on above data it marks whether eDP panel supports seamless DRRS or not. This information is needed for supporting seamless DRRS switch for certain power saving usecases. This patch is tested by enabling the DRM logs and user should see whether Seamless DRRS is supported or not. v2: Daniel's review comments Modified downclock deduction based on intel_find_panel_downclock v3: Chris's review comments Moved edp_downclock_avail and edp_downclock to intel_panel v4: Jani's review comments. Changed name of the enum edp_panel_type to drrs_support type. Change is_drrs_supported to drrs_support of type enum drrs_support_type. v5: Incorporated Jani's review comments Modify intel_dp_drrs_initialize to return downclock mode. Support for Gen7 and above. Signed-off-by: Pradeep Bhat Signed-off-by: Vandana Kannan --- drivers/gpu/drm/i915/intel_dp.c | 53 +++++++++++++++++++++++++++++++++++++- drivers/gpu/drm/i915/intel_drv.h | 20 ++++++++++++++ 2 files changed, 72 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 88cc9d3..f7dba83 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -3666,6 +3666,49 @@ intel_dp_init_panel_power_sequencer_registers(struct drm_device *dev, I915_READ(pp_div_reg)); } +static struct drm_display_mode * +intel_dp_drrs_initialize(struct intel_digital_port *intel_dig_port, + struct intel_connector *intel_connector, + struct drm_display_mode *fixed_mode) +{ + struct drm_connector *connector = &intel_connector->base; + struct intel_dp *intel_dp = &intel_dig_port->dp; + struct drm_device *dev = intel_dig_port->base.base.dev; + struct drm_i915_private *dev_priv = dev->dev_private; + struct drm_display_mode *downclock_mode = NULL; + + /** + * Check if PSR is supported by panel and enabled + * if so then DRRS is reported as not supported for Haswell. + */ + if (INTEL_INFO(dev)->gen < 8 && intel_edp_is_psr_enabled(dev)) { + DRM_INFO("eDP panel has PSR enabled. Cannot support DRRS\n"); + return downclock_mode; + } + + /* First check if DRRS is enabled from VBT struct */ + if (dev_priv->vbt.drrs_type == DRRS_NOT_SUPPORTED) { + DRM_INFO("VBT doesn't support DRRS\n"); + return downclock_mode; + } + + downclock_mode = intel_find_panel_downclock(dev,fixed_mode, connector); + + if (downclock_mode != NULL && + dev_priv->vbt.drrs_type == SEAMLESS_DRRS_SUPPORT) { + intel_connector->panel.edp_downclock_avail = true; + intel_connector->panel.edp_downclock = + downclock_mode->clock; + + intel_dp->drrs_state.type = dev_priv->vbt.drrs_type; + + intel_dp->drrs_state.refresh_rate_type = DRRS_HIGH_RR; + DRM_INFO("seamless DRRS supported for eDP panel.\n"); + } + + return downclock_mode; +} + static bool intel_edp_init_connector(struct intel_dp *intel_dp, struct intel_connector *intel_connector, struct edp_power_seq *power_seq) @@ -3675,10 +3718,13 @@ static bool intel_edp_init_connector(struct intel_dp *intel_dp, struct drm_device *dev = intel_dig_port->base.base.dev; struct drm_i915_private *dev_priv = dev->dev_private; struct drm_display_mode *fixed_mode = NULL; + struct drm_display_mode *downclock_mode = NULL; bool has_dpcd; struct drm_display_mode *scan; struct edid *edid; + intel_dp->drrs_state.type = DRRS_NOT_SUPPORTED; + if (!is_edp(intel_dp)) return true; @@ -3720,6 +3766,11 @@ static bool intel_edp_init_connector(struct intel_dp *intel_dp, list_for_each_entry(scan, &connector->probed_modes, head) { if ((scan->type & DRM_MODE_TYPE_PREFERRED)) { fixed_mode = drm_mode_duplicate(dev, scan); + if (INTEL_INFO(dev)->gen > 6) + downclock_mode = + intel_dp_drrs_initialize( + intel_dig_port, + intel_connector, fixed_mode); break; } } @@ -3732,7 +3783,7 @@ static bool intel_edp_init_connector(struct intel_dp *intel_dp, fixed_mode->type |= DRM_MODE_TYPE_PREFERRED; } - intel_panel_init(&intel_connector->panel, fixed_mode, NULL); + intel_panel_init(&intel_connector->panel, fixed_mode, downclock_mode); intel_panel_setup_backlight(connector); return true; diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h index 6aa549a..c41c735 100644 --- a/drivers/gpu/drm/i915/intel_drv.h +++ b/drivers/gpu/drm/i915/intel_drv.h @@ -168,6 +168,9 @@ struct intel_panel { bool active_low_pwm; struct backlight_device *device; } backlight; + + bool edp_downclock_avail; + int edp_downclock; }; struct intel_connector { @@ -464,6 +467,22 @@ struct intel_hdmi { #define DP_MAX_DOWNSTREAM_PORTS 0x10 +/** + * HIGH_RR is the highest eDP panel refresh rate read from EDID + * LOW_RR is the lowest eDP panel refresh rate found from EDID + * parsing for same resolution. + */ +enum edp_drrs_refresh_rate_type { + DRRS_HIGH_RR, + DRRS_LOW_RR, + DRRS_MAX_RR, /* RR count */ +}; + +struct drrs_info { + enum drrs_support_type type; + enum edp_drrs_refresh_rate_type refresh_rate_type; +}; + struct intel_dp { uint32_t output_reg; uint32_t aux_ch_ctl_reg; @@ -503,6 +522,7 @@ struct intel_dp { bool has_aux_irq, int send_bytes, uint32_t aux_clock_divider); + struct drrs_info drrs_state; }; struct intel_digital_port { -- 1.7.9.5