[Intel-gfx] [PATCH 4/4] drm/i915/opregion: Register/unregister opregion on platforms without display

[Imre Deak <imre.deak@intel.com>]

Call the opregion register/unregister functions during driver
loading/unloading on !HAS_DISPLAY platforms. These functions will send
the opregion adapter power state notifications which is required on all
platforms (similarly how this is sent during runtime and system
suspend/resume). Skip registering the ACPI video notifier callback on
!HAS_DISPLAY, where the corresponding video extensions are not
supported.

Signed-off-by: Imre Deak <imre.deak@intel.com>
---
 drivers/gpu/drm/i915/display/intel_display.c  | 11 +++++++----
 drivers/gpu/drm/i915/display/intel_opregion.c |  2 +-
 2 files changed, 8 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index 7827ef3e2d1e6..467f6e2376057 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -8882,11 +8882,12 @@ bool intel_modeset_probe_defer(struct pci_dev *pdev)
 
 void intel_display_driver_register(struct drm_i915_private *i915)
 {
-	if (!HAS_DISPLAY(i915))
-		return;
-
 	/* Must be done after probing outputs */
 	intel_opregion_register(i915);
+
+	if (!HAS_DISPLAY(i915))
+		return;
+
 	intel_acpi_video_register(i915);
 
 	intel_audio_init(i915);
@@ -8914,7 +8915,7 @@ void intel_display_driver_register(struct drm_i915_private *i915)
 void intel_display_driver_unregister(struct drm_i915_private *i915)
 {
 	if (!HAS_DISPLAY(i915))
-		return;
+		goto unregister_opregion;
 
 	intel_fbdev_unregister(i915);
 	intel_audio_deinit(i915);
@@ -8928,6 +8929,8 @@ void intel_display_driver_unregister(struct drm_i915_private *i915)
 	drm_atomic_helper_shutdown(&i915->drm);
 
 	acpi_video_unregister();
+
+unregister_opregion:
 	intel_opregion_unregister(i915);
 }
 
diff --git a/drivers/gpu/drm/i915/display/intel_opregion.c b/drivers/gpu/drm/i915/display/intel_opregion.c
index b7973a05d022d..37098e7f607e6 100644
--- a/drivers/gpu/drm/i915/display/intel_opregion.c
+++ b/drivers/gpu/drm/i915/display/intel_opregion.c
@@ -1150,7 +1150,7 @@ void intel_opregion_register(struct drm_i915_private *i915)
 	if (!opregion->header)
 		return;
 
-	if (opregion->acpi) {
+	if (HAS_DISPLAY(i915) && opregion->acpi) {
 		opregion->acpi_notifier.notifier_call =
 			intel_opregion_video_event;
 		register_acpi_notifier(&opregion->acpi_notifier);
-- 
2.37.1