From 93313538c15341f44e8e879aa071663795f07bdf Mon Sep 17 00:00:00 2001
From: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Date: Fri, 10 Nov 2017 12:34:59 +0100
Subject: [PATCH] drm/i915: Pass idle crtc_state to intel_dp_sink_crc
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Git-commit: 93313538c15341f44e8e879aa071663795f07bdf
Patch-mainline: v4.16-rc1
References: FATE#322643 bsc#1055900

IPS can only be enabled if the primary plane is visible, so
first make sure sw state matches hw state by waiting for hw_done.

After this pass crtc_state to intel_dp_sink_crc() so that can be used,
instead of using legacy pointers.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171110113503.16253-7-maarten.lankhorst@linux.intel.com
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/gpu/drm/i915/i915_debugfs.c |   17 +++++++++++++++--
 drivers/gpu/drm/i915/intel_dp.c     |   23 +++++++++++++----------
 drivers/gpu/drm/i915/intel_drv.h    |    3 ++-
 3 files changed, 30 insertions(+), 13 deletions(-)

--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -2745,6 +2745,7 @@ static int i915_sink_crc(struct seq_file
 	for_each_intel_connector_iter(connector, &conn_iter) {
 		struct drm_crtc *crtc;
 		struct drm_connector_state *state;
+		struct intel_crtc_state *crtc_state;
 
 		if (connector->base.connector_type != DRM_MODE_CONNECTOR_eDP)
 			continue;
@@ -2763,12 +2764,24 @@ retry:
 		if (ret)
 			goto err;
 
-		if (!crtc->state->active)
+		crtc_state = to_intel_crtc_state(crtc->state);
+		if (!crtc_state->base.active)
 			continue;
 
+		/*
+		 * We need to wait for all crtc updates to complete, to make
+		 * sure any pending modesets and plane updates are completed.
+		 */
+		if (crtc_state->base.commit) {
+			ret = wait_for_completion_interruptible(&crtc_state->base.commit->hw_done);
+
+			if (ret)
+				goto err;
+		}
+
 		intel_dp = enc_to_intel_dp(state->best_encoder);
 
-		ret = intel_dp_sink_crc(intel_dp, crc);
+		ret = intel_dp_sink_crc(intel_dp, crtc_state, crc);
 		if (ret)
 			goto err;
 
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -3861,11 +3861,12 @@ intel_dp_configure_mst(struct intel_dp *
 					intel_dp->is_mst);
 }
 
-static int intel_dp_sink_crc_stop(struct intel_dp *intel_dp)
+static int intel_dp_sink_crc_stop(struct intel_dp *intel_dp,
+				  struct intel_crtc_state *crtc_state, bool disable_wa)
 {
 	struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
 	struct drm_i915_private *dev_priv = to_i915(dig_port->base.base.dev);
-	struct intel_crtc *intel_crtc = to_intel_crtc(dig_port->base.base.crtc);
+	struct intel_crtc *intel_crtc = to_intel_crtc(crtc_state->base.crtc);
 	u8 buf;
 	int ret = 0;
 	int count = 0;
@@ -3901,15 +3902,17 @@ static int intel_dp_sink_crc_stop(struct
 	}
 
  out:
-	hsw_enable_ips(intel_crtc);
+	if (disable_wa)
+		hsw_enable_ips(intel_crtc);
 	return ret;
 }
 
-static int intel_dp_sink_crc_start(struct intel_dp *intel_dp)
+static int intel_dp_sink_crc_start(struct intel_dp *intel_dp,
+				   struct intel_crtc_state *crtc_state)
 {
 	struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
 	struct drm_i915_private *dev_priv = to_i915(dig_port->base.base.dev);
-	struct intel_crtc *intel_crtc = to_intel_crtc(dig_port->base.base.crtc);
+	struct intel_crtc *intel_crtc = to_intel_crtc(crtc_state->base.crtc);
 	u8 buf;
 	int ret;
 
@@ -3923,7 +3926,7 @@ static int intel_dp_sink_crc_start(struc
 		return -EIO;
 
 	if (buf & DP_TEST_SINK_START) {
-		ret = intel_dp_sink_crc_stop(intel_dp);
+		ret = intel_dp_sink_crc_stop(intel_dp, crtc_state, false);
 		if (ret)
 			return ret;
 	}
@@ -3940,16 +3943,16 @@ static int intel_dp_sink_crc_start(struc
 	return 0;
 }
 
-int intel_dp_sink_crc(struct intel_dp *intel_dp, u8 *crc)
+int intel_dp_sink_crc(struct intel_dp *intel_dp, struct intel_crtc_state *crtc_state, u8 *crc)
 {
 	struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
 	struct drm_i915_private *dev_priv = to_i915(dig_port->base.base.dev);
-	struct intel_crtc *intel_crtc = to_intel_crtc(dig_port->base.base.crtc);
+	struct intel_crtc *intel_crtc = to_intel_crtc(crtc_state->base.crtc);
 	u8 buf;
 	int count, ret;
 	int attempts = 6;
 
-	ret = intel_dp_sink_crc_start(intel_dp);
+	ret = intel_dp_sink_crc_start(intel_dp, crtc_state);
 	if (ret)
 		return ret;
 
@@ -3977,7 +3980,7 @@ int intel_dp_sink_crc(struct intel_dp *i
 	}
 
 stop:
-	intel_dp_sink_crc_stop(intel_dp);
+	intel_dp_sink_crc_stop(intel_dp, crtc_state, true);
 	return ret;
 }
 
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -1532,7 +1532,8 @@ void intel_dp_sink_dpms(struct intel_dp
 void intel_dp_encoder_reset(struct drm_encoder *encoder);
 void intel_dp_encoder_suspend(struct intel_encoder *intel_encoder);
 void intel_dp_encoder_destroy(struct drm_encoder *encoder);
-int intel_dp_sink_crc(struct intel_dp *intel_dp, u8 *crc);
+int intel_dp_sink_crc(struct intel_dp *intel_dp,
+		      struct intel_crtc_state *crtc_state, u8 *crc);
 bool intel_dp_compute_config(struct intel_encoder *encoder,
 			     struct intel_crtc_state *pipe_config,
 			     struct drm_connector_state *conn_state);