From: kettenis <kettenis@openbsd.org>
Date: Mon, 5 Dec 2022 07:37:57 +0000 (+0000)
Subject: Trigger a kevent when we change the backlight.  This gives the Xorg
X-Git-Url: http://artulab.com/gitweb/?a=commitdiff_plain;h=141f4e1756e0587ede9f0d04081c7f82d3c48887;p=openbsd

Trigger a kevent when we change the backlight.  This gives the Xorg
drivers a chance to notice the update of the Backlight connector property
when we change it behind its back.

ok jsg@
---

diff --git a/sys/dev/pci/drm/drm_connector.c b/sys/dev/pci/drm/drm_connector.c
index e9e12a1a6ee..d0e09ddafc8 100644
--- a/sys/dev/pci/drm/drm_connector.c
+++ b/sys/dev/pci/drm/drm_connector.c
@@ -2340,6 +2340,7 @@ int drm_connector_set_obj_prop(struct drm_mode_object *obj,
 	} else if (property == connector->backlight_property) {
 		connector->backlight_device->props.brightness = value;
 		backlight_schedule_update_status(connector->backlight_device);
+		KNOTE(&connector->dev->note, NOTE_CHANGE);
 		ret = 0;
 #endif
 	} else if (connector->funcs->set_property)
diff --git a/sys/dev/pci/drm/drm_mode_object.c b/sys/dev/pci/drm/drm_mode_object.c
index eeea6e539a1..6826d3fbd8d 100644
--- a/sys/dev/pci/drm/drm_mode_object.c
+++ b/sys/dev/pci/drm/drm_mode_object.c
@@ -527,6 +527,7 @@ retry:
 		struct drm_connector *connector = obj_to_connector(obj);
 		connector->backlight_device->props.brightness = prop_value;
 		backlight_schedule_update_status(connector->backlight_device);
+		KNOTE(&connector->dev->note, NOTE_CHANGE);
 		ret = 0;
 #endif
 	} else {
diff --git a/sys/dev/pci/drm/i915/i915_drv.c b/sys/dev/pci/drm/i915/i915_drv.c
index 5f1ba56413b..6ef29443a1e 100644
--- a/sys/dev/pci/drm/i915/i915_drv.c
+++ b/sys/dev/pci/drm/i915/i915_drv.c
@@ -2134,6 +2134,7 @@ inteldrm_wsioctl(void *v, u_long cmd, caddr_t data, int flag, struct proc *p)
 		case WSDISPLAYIO_PARAM_BRIGHTNESS:
 			bd->props.brightness = dp->curval;
 			backlight_update_status(bd);
+			KNOTE(&dev_priv->drm.note, NOTE_CHANGE);
 			return 0;
 		}
 		break;