drm/i915/display: Remove fbdev suspend and hotplug tracking

The DRM client code already tracks suspend status and hotplug events
for each client. Remove similar code from i915's fbdev client.

Allows for the removal of all hdp_* fields form struct intel_fbdev.
Calls to intel_fbdev_output_poll_changed() are reduced the shared
helper drm_fb_helper_hotplug_event().

Signed-off-by: Thomas Zimmermann <[email protected]>
Reviewed-by: Maarten Lankhorst <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
Signed-off-by: Maarten Lankhorst <[email protected]>

Author: Thomas Zimmermann

drivers/gpu/drm/i915/display/intel_fbdev.c

@@ -61,14 +61,6 @@ struct intel_fbdev {
 	struct i915_vma *vma;
 	unsigned long vma_flags;
 	int preferred_bpp;
-
-	/* Whether or not fbdev hpd processing is temporarily suspended */
-	bool hpd_suspended: 1;
-	/* Set when a hotplug was received while HPD processing was suspended */
-	bool hpd_waiting: 1;
-
-	/* Protects hpd_suspended */
-	struct mutex hpd_lock;
 };
 
 static struct intel_fbdev *to_intel_fbdev(struct drm_fb_helper *fb_helper)
@@ -187,12 +179,6 @@ static int intelfb_create(struct drm_fb_helper *helper,
 	struct drm_gem_object *obj;
 	int ret;
 
-	mutex_lock(&ifbdev->hpd_lock);
-	ret = ifbdev->hpd_suspended ? -EAGAIN : 0;
-	mutex_unlock(&ifbdev->hpd_lock);
-	if (ret)
-		return ret;
-
 	ifbdev->fb = NULL;
 
 	if (fb &&
@@ -459,27 +445,6 @@ static void intel_fbdev_suspend_worker(struct work_struct *work)
 				true);
 }
 
-/* Suspends/resumes fbdev processing of incoming HPD events. When resuming HPD
- * processing, fbdev will perform a full connector reprobe if a hotplug event
- * was received while HPD was suspended.
- */
-static void intel_fbdev_hpd_set_suspend(struct drm_i915_private *i915, int state)
-{
-	struct intel_fbdev *ifbdev = i915->display.fbdev.fbdev;
-	bool send_hpd = false;
-
-	mutex_lock(&ifbdev->hpd_lock);
-	ifbdev->hpd_suspended = state == FBINFO_STATE_SUSPENDED;
-	send_hpd = !ifbdev->hpd_suspended && ifbdev->hpd_waiting;
-	ifbdev->hpd_waiting = false;
-	mutex_unlock(&ifbdev->hpd_lock);
-
-	if (send_hpd) {
-		drm_dbg_kms(&i915->drm, "Handling delayed fbcon HPD event\n");
-		drm_fb_helper_hotplug_event(&ifbdev->helper);
-	}
-}
-
 void intel_fbdev_set_suspend(struct drm_device *dev, int state, bool synchronous)
 {
 	struct drm_i915_private *dev_priv = to_i915(dev);
@@ -493,7 +458,7 @@ void intel_fbdev_set_suspend(struct drm_device *dev, int state, bool synchronous
 		return;
 
 	if (!ifbdev->vma)
-		goto set_suspend;
+		return;
 
 	info = ifbdev->helper.info;
 
@@ -536,28 +501,6 @@ void intel_fbdev_set_suspend(struct drm_device *dev, int state, bool synchronous
 
 	drm_fb_helper_set_suspend(&ifbdev->helper, state);
 	console_unlock();
-
-set_suspend:
-	intel_fbdev_hpd_set_suspend(dev_priv, state);
-}
-
-static int intel_fbdev_output_poll_changed(struct drm_device *dev)
-{
-	struct intel_fbdev *ifbdev = to_i915(dev)->display.fbdev.fbdev;
-	bool send_hpd;
-
-	if (!ifbdev)
-		return -EINVAL;
-
-	mutex_lock(&ifbdev->hpd_lock);
-	send_hpd = !ifbdev->hpd_suspended;
-	ifbdev->hpd_waiting = true;
-	mutex_unlock(&ifbdev->hpd_lock);
-
-	if (send_hpd && (ifbdev->vma || ifbdev->helper.deferred_setup))
-		drm_fb_helper_hotplug_event(&ifbdev->helper);
-
-	return 0;
 }
 
 static int intel_fbdev_restore_mode(struct drm_i915_private *dev_priv)
@@ -622,7 +565,7 @@ static int intel_fbdev_client_hotplug(struct drm_client_dev *client)
 	int ret;
 
 	if (dev->fb_helper)
-		return intel_fbdev_output_poll_changed(dev);
+		return drm_fb_helper_hotplug_event(dev->fb_helper);
 
 	ret = drm_fb_helper_init(dev, fb_helper);
 	if (ret)
@@ -682,7 +625,6 @@ void intel_fbdev_setup(struct drm_i915_private *i915)
 
 	i915->display.fbdev.fbdev = ifbdev;
 	INIT_WORK(&i915->display.fbdev.suspend_work, intel_fbdev_suspend_worker);
-	mutex_init(&ifbdev->hpd_lock);
 	if (intel_fbdev_init_bios(dev, ifbdev))
 		ifbdev->helper.preferred_bpp = ifbdev->preferred_bpp;
 	else
@@ -701,7 +643,6 @@ void intel_fbdev_setup(struct drm_i915_private *i915)
 
 err_drm_fb_helper_unprepare:
 	drm_fb_helper_unprepare(&ifbdev->helper);
-	mutex_destroy(&ifbdev->hpd_lock);
 	kfree(ifbdev);
 }