[PATCH 08/12] drm/i915/drrs: Disable DRRS when needed in fastsets

[José Roberto de Souza]

Changes in the configuration could cause PSR to be compatible and
enabled so driver must also be able to disable DRRS when doing
fastsets.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=109263
Cc: Hans de Goede <hdegoede at redhat.com>
Cc: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan at intel.com>
Signed-off-by: José Roberto de Souza <jose.souza at intel.com>
---
 drivers/gpu/drm/i915/intel_ddi.c |  2 +-
 drivers/gpu/drm/i915/intel_dp.c  | 63 ++++++++++++++++++++++++++++----
 drivers/gpu/drm/i915/intel_drv.h |  2 +
 3 files changed, 59 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index 9211e4579489..a496ad71d25c 100644
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -3557,7 +3557,7 @@ static void intel_ddi_update_pipe_dp(struct intel_encoder *encoder,
 	struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
 
 	intel_psr_update(intel_dp, crtc_state);
-	intel_edp_drrs_enable(intel_dp, crtc_state);
+	intel_edp_drrs_update(intel_dp, crtc_state);
 
 	intel_panel_update_backlight(encoder, crtc_state, conn_state);
 }
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index aff5673e4e94..e839135a4dcd 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -6451,6 +6451,15 @@ static void intel_dp_set_drrs_state(struct drm_i915_private *dev_priv,
 	DRM_DEBUG_KMS("eDP Refresh Rate set to : %dHz\n", refresh_rate);
 }
 
+static void
+intel_edp_drrs_enable_locked(struct intel_dp *intel_dp)
+{
+	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
+
+	dev_priv->drrs.busy_frontbuffer_bits = 0;
+	dev_priv->drrs.dp = intel_dp;
+}
+
 /**
  * intel_edp_drrs_enable - init drrs struct if supported
  * @intel_dp: DP struct
@@ -6476,14 +6485,25 @@ void intel_edp_drrs_enable(struct intel_dp *intel_dp,
 		goto unlock;
 	}
 
-	dev_priv->drrs.busy_frontbuffer_bits = 0;
-
-	dev_priv->drrs.dp = intel_dp;
+	intel_edp_drrs_enable_locked(intel_dp);
 
 unlock:
 	mutex_unlock(&dev_priv->drrs.mutex);
 }
 
+static void
+intel_edp_drrs_disable_locked(struct intel_dp *intel_dp,
+			      const struct intel_crtc_state *crtc_state)
+{
+	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
+
+	if (dev_priv->drrs.refresh_rate_type == DRRS_LOW_RR)
+		intel_dp_set_drrs_state(dev_priv, crtc_state,
+			intel_dp->attached_connector->panel.fixed_mode->vrefresh);
+
+	dev_priv->drrs.dp = NULL;
+}
+
 /**
  * intel_edp_drrs_disable - Disable DRRS
  * @intel_dp: DP struct
@@ -6504,16 +6524,45 @@ void intel_edp_drrs_disable(struct intel_dp *intel_dp,
 		return;
 	}
 
-	if (dev_priv->drrs.refresh_rate_type == DRRS_LOW_RR)
-		intel_dp_set_drrs_state(dev_priv, old_crtc_state,
-			intel_dp->attached_connector->panel.fixed_mode->vrefresh);
+	intel_edp_drrs_disable_locked(intel_dp, old_crtc_state);
 
-	dev_priv->drrs.dp = NULL;
 	mutex_unlock(&dev_priv->drrs.mutex);
 
 	cancel_delayed_work_sync(&dev_priv->drrs.work);
 }
 
+/**
+ * intel_edp_drrs_update - Update DRRS state
+ * @intel_dp: Intel DP
+ * @crtc_state: new CRTC state
+ *
+ * This function will update DRRS states, disabling or enabling DRRS when
+ * executing fastsets. For full modeset, intel_edp_drrs_disable() and
+ * intel_edp_drrs_enable() should be called instead.
+ */
+void
+intel_edp_drrs_update(struct intel_dp *intel_dp,
+		      const struct intel_crtc_state *crtc_state)
+{
+	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
+
+	if (dev_priv->drrs.type != SEAMLESS_DRRS_SUPPORT)
+		return;
+
+	mutex_lock(&dev_priv->drrs.mutex);
+
+	if (crtc_state->has_drrs == !!dev_priv->drrs.dp)
+		goto unlock;
+
+	if (crtc_state->has_drrs)
+		intel_edp_drrs_enable_locked(intel_dp);
+	else
+		intel_edp_drrs_disable_locked(intel_dp, crtc_state);
+
+unlock:
+	mutex_unlock(&dev_priv->drrs.mutex);
+}
+
 static void intel_edp_drrs_downclock_work(struct work_struct *work)
 {
 	struct drm_i915_private *dev_priv =
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index b23ff4a897dc..9d1d2f19ce73 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -1843,6 +1843,8 @@ void intel_edp_drrs_enable(struct intel_dp *intel_dp,
 			   const struct intel_crtc_state *crtc_state);
 void intel_edp_drrs_disable(struct intel_dp *intel_dp,
 			    const struct intel_crtc_state *crtc_state);
+void intel_edp_drrs_update(struct intel_dp *intel_dp,
+			   const struct intel_crtc_state *crtc_state);
 void intel_edp_drrs_invalidate(struct drm_i915_private *dev_priv,
 			       unsigned int frontbuffer_bits);
 void intel_edp_drrs_flush(struct drm_i915_private *dev_priv,
-- 
2.20.1