From b0c80bd5d2e317f7596fe2badc1a3379fb3211e5 Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexander.deucher@amd.com>
Date: Tue, 11 Oct 2016 10:44:24 -0400
Subject: drm/radeon: fix up dp aux tear down (v2)
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Port the amdgpu fixes from Grazvydas to radeon.

v2: drop unrelated whitespace change.

bug:
https://bugs.freedesktop.org/show_bug.cgi?id=98200

Reviewed-and-Tested-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/radeon/radeon_connectors.c b/drivers/gpu/drm/radeon/radeon_connectors.c
index 50e96d2..e18839d 100644
--- a/drivers/gpu/drm/radeon/radeon_connectors.c
+++ b/drivers/gpu/drm/radeon/radeon_connectors.c
@@ -927,6 +927,16 @@ radeon_lvds_detect(struct drm_connector *connector, bool force)
 	return ret;
 }
 
+static void radeon_connector_unregister(struct drm_connector *connector)
+{
+	struct radeon_connector *radeon_connector = to_radeon_connector(connector);
+
+	if (radeon_connector->ddc_bus->has_aux) {
+		drm_dp_aux_unregister(&radeon_connector->ddc_bus->aux);
+		radeon_connector->ddc_bus->has_aux = false;
+	}
+}
+
 static void radeon_connector_destroy(struct drm_connector *connector)
 {
 	struct radeon_connector *radeon_connector = to_radeon_connector(connector);
@@ -984,6 +994,7 @@ static const struct drm_connector_funcs radeon_lvds_connector_funcs = {
 	.dpms = drm_helper_connector_dpms,
 	.detect = radeon_lvds_detect,
 	.fill_modes = drm_helper_probe_single_connector_modes,
+	.early_unregister = radeon_connector_unregister,
 	.destroy = radeon_connector_destroy,
 	.set_property = radeon_lvds_set_property,
 };
@@ -1111,6 +1122,7 @@ static const struct drm_connector_funcs radeon_vga_connector_funcs = {
 	.dpms = drm_helper_connector_dpms,
 	.detect = radeon_vga_detect,
 	.fill_modes = drm_helper_probe_single_connector_modes,
+	.early_unregister = radeon_connector_unregister,
 	.destroy = radeon_connector_destroy,
 	.set_property = radeon_connector_set_property,
 };
@@ -1188,6 +1200,7 @@ static const struct drm_connector_funcs radeon_tv_connector_funcs = {
 	.dpms = drm_helper_connector_dpms,
 	.detect = radeon_tv_detect,
 	.fill_modes = drm_helper_probe_single_connector_modes,
+	.early_unregister = radeon_connector_unregister,
 	.destroy = radeon_connector_destroy,
 	.set_property = radeon_connector_set_property,
 };
@@ -1519,6 +1532,7 @@ static const struct drm_connector_funcs radeon_dvi_connector_funcs = {
 	.detect = radeon_dvi_detect,
 	.fill_modes = drm_helper_probe_single_connector_modes,
 	.set_property = radeon_connector_set_property,
+	.early_unregister = radeon_connector_unregister,
 	.destroy = radeon_connector_destroy,
 	.force = radeon_dvi_force,
 };
@@ -1832,6 +1846,7 @@ static const struct drm_connector_funcs radeon_dp_connector_funcs = {
 	.detect = radeon_dp_detect,
 	.fill_modes = drm_helper_probe_single_connector_modes,
 	.set_property = radeon_connector_set_property,
+	.early_unregister = radeon_connector_unregister,
 	.destroy = radeon_connector_destroy,
 	.force = radeon_dvi_force,
 };
@@ -1841,6 +1856,7 @@ static const struct drm_connector_funcs radeon_edp_connector_funcs = {
 	.detect = radeon_dp_detect,
 	.fill_modes = drm_helper_probe_single_connector_modes,
 	.set_property = radeon_lvds_set_property,
+	.early_unregister = radeon_connector_unregister,
 	.destroy = radeon_connector_destroy,
 	.force = radeon_dvi_force,
 };
@@ -1850,6 +1866,7 @@ static const struct drm_connector_funcs radeon_lvds_bridge_connector_funcs = {
 	.detect = radeon_dp_detect,
 	.fill_modes = drm_helper_probe_single_connector_modes,
 	.set_property = radeon_lvds_set_property,
+	.early_unregister = radeon_connector_unregister,
 	.destroy = radeon_connector_destroy,
 	.force = radeon_dvi_force,
 };
diff --git a/drivers/gpu/drm/radeon/radeon_i2c.c b/drivers/gpu/drm/radeon/radeon_i2c.c
index 021aa00..29f7817 100644
--- a/drivers/gpu/drm/radeon/radeon_i2c.c
+++ b/drivers/gpu/drm/radeon/radeon_i2c.c
@@ -982,9 +982,8 @@ void radeon_i2c_destroy(struct radeon_i2c_chan *i2c)
 {
 	if (!i2c)
 		return;
+	WARN_ON(i2c->has_aux);
 	i2c_del_adapter(&i2c->adapter);
-	if (i2c->has_aux)
-		drm_dp_aux_unregister(&i2c->aux);
 	kfree(i2c);
 }
 
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