commit 2807cf69df89defb024ac74708b6e43c231d0d47
author Daniel Vetter <daniel.vetter@ffwll.ch> Fri Jul 11 10:30:11 2014 -0700
committer Daniel Vetter <daniel.vetter@ffwll.ch> Wed Jul 23 07:05:16 2014 +0200
tree 10891c4b6192c366960fb892ba45c9e9fef67807
parent 1fcc9d1cf3c72ec7c7a3253b50b8e44f95f3f616

drm/i915: Track the psr dp connector in dev_priv->psr.enabled

Trying to fish that one out through looping is a bit a locking
nightmare. So just set it and use it in the work struct.

v2:
- Don't Oops in psr_work, spotted by Rodrigo.
- Fix compile warning.

Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/i915_debugfs.c

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 981ca42..62ea619 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -1894,7 +1894,7 @@
 
 	seq_printf(m, "Sink_Support: %s\n", yesno(dev_priv->psr.sink_support));
 	seq_printf(m, "Source_OK: %s\n", yesno(dev_priv->psr.source_ok));
-	seq_printf(m, "Enabled: %s\n", yesno(dev_priv->psr.enabled));
+	seq_printf(m, "Enabled: %s\n", yesno((bool)dev_priv->psr.enabled));
 	seq_printf(m, "Active: %s\n", yesno(dev_priv->psr.active));
 
 	enabled = HAS_PSR(dev) &&

drivers/gpu/drm/i915/i915_drv.h

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index c5d157b..d8115c3 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -658,10 +658,11 @@
 	struct intel_connector *connector;
 };
 
+struct intel_dp;
 struct i915_psr {
 	bool sink_support;
 	bool source_ok;
-	bool enabled;
+	struct intel_dp *enabled;
 	bool active;
 	struct delayed_work work;
 };

drivers/gpu/drm/i915/intel_dp.c

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 4017406..457bd82 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -1843,7 +1843,7 @@
 	/* Enable PSR on the host */
 	intel_edp_psr_enable_source(intel_dp);
 
-	dev_priv->psr.enabled = true;
+	dev_priv->psr.enabled = intel_dp;
 	dev_priv->psr.active = true;
 }
 
@@ -1884,26 +1884,22 @@
 		       EDP_PSR_STATUS_STATE_MASK) == 0, 2000, 10))
 		DRM_ERROR("Timed out waiting for PSR Idle State\n");
 
-	dev_priv->psr.enabled = false;
+	dev_priv->psr.enabled = NULL;
 }
 
 static void intel_edp_psr_work(struct work_struct *work)
 {
 	struct drm_i915_private *dev_priv =
 		container_of(work, typeof(*dev_priv), psr.work.work);
-	struct drm_device *dev = dev_priv->dev;
-	struct intel_encoder *encoder;
-	struct intel_dp *intel_dp = NULL;
+	struct intel_dp *intel_dp = dev_priv->psr.enabled;
 
-	list_for_each_entry(encoder, &dev->mode_config.encoder_list, base.head)
-		if (encoder->type == INTEL_OUTPUT_EDP) {
-			intel_dp = enc_to_intel_dp(&encoder->base);
+	if (!intel_dp)
+		return;
 
-			if (!intel_edp_psr_match_conditions(intel_dp))
-				intel_edp_psr_disable(intel_dp);
-			else
-				intel_edp_psr_do_enable(intel_dp);
-		}
+	if (!intel_edp_psr_match_conditions(intel_dp))
+		intel_edp_psr_disable(intel_dp);
+	else
+		intel_edp_psr_do_enable(intel_dp);
 }
 
 static void intel_edp_psr_inactivate(struct drm_device *dev)