[PATCH 10/31] drm/i915: Move backlight unregistration to connector unregistration

[Chris Wilson]

Currently the backlight is being unregistered in the unload phase (after
the display and its objects are unregistered). Move the backlight
unregistration into the analogous phase by performing it from the
connector unregistration, just prior to its deletion.

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/intel_display.c |  5 +++--
 drivers/gpu/drm/i915/intel_drv.h     |  9 ++++++++-
 drivers/gpu/drm/i915/intel_panel.c   | 13 +------------
 3 files changed, 12 insertions(+), 15 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 110154fec80f..dfa73c815dfa 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -16200,6 +16200,9 @@ void intel_modeset_gem_init(struct drm_device *dev)
 
 void intel_connector_unregister(struct drm_connector *connector)
 {
+	struct intel_connector *intel_connector = to_intel_connector(connector);
+
+	intel_backlight_device_unregister(intel_connector);
 	intel_panel_destroy_backlight(connector);
 }
 
@@ -16209,8 +16212,6 @@ void intel_modeset_cleanup(struct drm_device *dev)
 
 	intel_disable_gt_powersave(dev_priv);
 
-	intel_backlight_unregister(dev);
-
 	/*
 	 * Interrupts and polling as the first thing to avoid creating havoc.
 	 * Too much stuff here (turning of connectors, ...) would
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index a054676ff420..86ac7eca0f5a 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -1492,7 +1492,14 @@ extern struct drm_display_mode *intel_find_panel_downclock(
 				struct drm_display_mode *fixed_mode,
 				struct drm_connector *connector);
 void intel_backlight_register(struct drm_device *dev);
-void intel_backlight_unregister(struct drm_device *dev);
+
+#if IS_ENABLED(CONFIG_BACKLIGHT_CLASS_DEVICE)
+void intel_backlight_device_unregister(struct intel_connector *connector);
+#else /* CONFIG_BACKLIGHT_CLASS_DEVICE */
+static inline void intel_backlight_device_unregister(struct intel_connector *connector)
+{
+}
+#endif /* CONFIG_BACKLIGHT_CLASS_DEVICE */
 
 
 /* intel_psr.c */
diff --git a/drivers/gpu/drm/i915/intel_panel.c b/drivers/gpu/drm/i915/intel_panel.c
index c64aae6b673a..d541e4300fee 100644
--- a/drivers/gpu/drm/i915/intel_panel.c
+++ b/drivers/gpu/drm/i915/intel_panel.c
@@ -1216,7 +1216,7 @@ static int intel_backlight_device_register(struct intel_connector *connector)
 	return 0;
 }
 
-static void intel_backlight_device_unregister(struct intel_connector *connector)
+void intel_backlight_device_unregister(struct intel_connector *connector)
 {
 	struct intel_panel *panel = &connector->panel;
 
@@ -1230,9 +1230,6 @@ static int intel_backlight_device_register(struct intel_connector *connector)
 {
 	return 0;
 }
-static void intel_backlight_device_unregister(struct intel_connector *connector)
-{
-}
 #endif /* CONFIG_BACKLIGHT_CLASS_DEVICE */
 
 /*
@@ -1824,11 +1821,3 @@ void intel_backlight_register(struct drm_device *dev)
 	for_each_intel_connector(dev, connector)
 		intel_backlight_device_register(connector);
 }
-
-void intel_backlight_unregister(struct drm_device *dev)
-{
-	struct intel_connector *connector;
-
-	for_each_intel_connector(dev, connector)
-		intel_backlight_device_unregister(connector);
-}
-- 
2.8.1