[Intel-gfx] [PATCH] drm/i915: Always send a hotplug event after resume

[Chris Wilson]

Curently after resume we reset all connector status to unknown and then
try to tell userspace about the probable changes (e.g. a laptop being
unplugged from one dock and plugged into another). However, we call
drm_helper_hpd_irq_event() to send the hotplug event to userspace which
first does a check of connector->status before deciding if userspace
needs to know about the event. This will filter out the above scenario
of one output being replaced because it only checks the status and not
whether the output is the same.

Always send the hotplug uevent to userspace upon resume, and force it to
reprobe.

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/i915_drv.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 4df75e63cf22..da944ca4298f 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -1606,7 +1606,7 @@ static int i915_drm_resume(struct drm_device *dev)
 	 * */
 	intel_hpd_init(dev_priv);
 	/* Config may have changed between suspend and resume */
-	drm_helper_hpd_irq_event(dev);
+	drm_kms_helper_hotplug_event(dev, NULL);
 
 	intel_opregion_register(dev_priv);
 
-- 
2.9.3