[PATCH 2/2] 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>
Cc: Jani Nikula <jani.nikula at linux.intel.com>
---
 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 6cad3ccc2752..0b2cd669ac05 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -16315,6 +16315,9 @@ 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);
 }
 
@@ -16324,8 +16327,6 @@ 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 adb6b9eb9f2f..7d0e071fe355 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -1501,7 +1501,14 @@ 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 f0b1602c3258..bf721781c259 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 */
 
 /*
@@ -1820,11 +1817,3 @@ 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