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path: root/common/recipes-kernel/linux/files/0689-drm-amdgpu-Use-non-polling-user-mode-notification-for-DAL.patch
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From 7f629b8c628b12e1c913baeb82709b464ddffd7b Mon Sep 17 00:00:00 2001
From: Eric Yang <eric.yang2@amd.com>
Date: Tue, 27 Sep 2016 14:07:02 +0530
Subject: [PATCH] Use non-polling user mode notification for DAL

DAL do not use polling for user mode notification. This
change allow actual user mode notification on S3 resume
when DAL is enabled

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Eric Yang <eric.yang2@amd.com>
Signed-off-by: Sanjay R Mehta <sanju.mehta@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 21 +++++++++++++++------
 1 file changed, 15 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 59209e4..cfeebcc 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -1707,12 +1707,14 @@ int amdgpu_suspend_kms(struct drm_device *dev, bool suspend, bool fbcon)
 
 	drm_kms_helper_poll_disable(dev);
 
-	/* turn off display hw */
-	drm_modeset_lock_all(dev);
-	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
-		drm_helper_connector_dpms(connector, DRM_MODE_DPMS_OFF);
+	if (!amdgpu_has_dal_support(adev)) {
+		/* turn off display hw */
+		drm_modeset_lock_all(dev);
+		list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
+			drm_helper_connector_dpms(connector, DRM_MODE_DPMS_OFF);
+		}
+		drm_modeset_unlock_all(dev);
 	}
-	drm_modeset_unlock_all(dev);
 
 	/* unpin the front buffers and cursors */
 	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
@@ -1807,6 +1809,9 @@ int amdgpu_resume_kms(struct drm_device *dev, bool resume, bool fbcon)
 	if (r)
 		DRM_ERROR("amdgpu_resume failed (%d).\n", r);
 
+	if (r)
+		DRM_ERROR("amdgpu_resume failed (%d).\n", r);
+
 	amdgpu_fence_driver_resume(adev);
 
 	if (resume) {
@@ -1866,7 +1871,11 @@ int amdgpu_resume_kms(struct drm_device *dev, bool resume, bool fbcon)
 #ifdef CONFIG_PM
 	dev->dev->power.disable_depth++;
 #endif
-	drm_helper_hpd_irq_event(dev);
+
+	if (!amdgpu_has_dal_support(adev))
+		drm_helper_hpd_irq_event(dev);
+	else
+		drm_kms_helper_hotplug_event(dev);
 #ifdef CONFIG_PM
 	dev->dev->power.disable_depth--;
 #endif
-- 
2.7.4