drm/radeon/kms: set HPD polarity in hpd_init()

Polarity needs to be set accordingly to connector status (connected
or disconnected). Set it up in hpd_init() so first hotplug works
reliably no matter what is the initial set of connector. hpd_init()
also covers resume so HPD will work correctly after resume as well.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: Jerome Glisse <j.glisse@gmail.com>
Cc: stable@kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>

drivers/gpu/drm/radeon/evergreen.c

@@ -353,6 +353,7 @@ void evergreen_hpd_init(struct radeon_device *rdev)
 		default:
 			break;
 		}
+		radeon_hpd_set_polarity(rdev, radeon_connector->hpd.hpd);
 	}
 	if (rdev->irq.installed)
 		evergreen_irq_set(rdev);

drivers/gpu/drm/radeon/r100.c

@@ -536,6 +536,7 @@ void r100_hpd_init(struct radeon_device *rdev)
 		default:
 			break;
 		}
+		radeon_hpd_set_polarity(rdev, radeon_connector->hpd.hpd);
 	}
 	if (rdev->irq.installed)
 		r100_irq_set(rdev);

drivers/gpu/drm/radeon/r600.c

@@ -762,13 +762,14 @@ void r600_hpd_init(struct radeon_device *rdev)
 	struct drm_device *dev = rdev->ddev;
 	struct drm_connector *connector;
 
+	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
+		struct radeon_connector *radeon_connector = to_radeon_connector(connector);
+
 		if (ASIC_IS_DCE3(rdev)) {
 			u32 tmp = DC_HPDx_CONNECTION_TIMER(0x9c4) | DC_HPDx_RX_INT_TIMER(0xfa);
 			if (ASIC_IS_DCE32(rdev))
 				tmp |= DC_HPDx_EN;
 
-		list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
-			struct radeon_connector *radeon_connector = to_radeon_connector(connector);
 			switch (radeon_connector->hpd.hpd) {
 			case RADEON_HPD_1:
 				WREG32(DC_HPD1_CONTROL, tmp);
@@ -798,10 +799,7 @@ void r600_hpd_init(struct radeon_device *rdev)
 			default:
 				break;
 			}
-		}
 		} else {
-		list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
-			struct radeon_connector *radeon_connector = to_radeon_connector(connector);
 			switch (radeon_connector->hpd.hpd) {
 			case RADEON_HPD_1:
 				WREG32(DC_HOT_PLUG_DETECT1_CONTROL, DC_HOT_PLUG_DETECTx_EN);
@@ -819,6 +817,7 @@ void r600_hpd_init(struct radeon_device *rdev)
 				break;
 			}
 		}
+		radeon_hpd_set_polarity(rdev, radeon_connector->hpd.hpd);
 	}
 	if (rdev->irq.installed)
 		r600_irq_set(rdev);

drivers/gpu/drm/radeon/radeon_connectors.c

@@ -1733,7 +1733,6 @@ radeon_add_atom_connector(struct drm_device *dev,
 			connector->polled = DRM_CONNECTOR_POLL_CONNECT;
 	} else
 		connector->polled = DRM_CONNECTOR_POLL_HPD;
-	radeon_hpd_set_polarity(rdev, radeon_connector->hpd.hpd);
 
 	connector->display_info.subpixel_order = subpixel_order;
 	drm_sysfs_connector_add(connector);

drivers/gpu/drm/radeon/rs600.c

@@ -287,6 +287,7 @@ void rs600_hpd_init(struct radeon_device *rdev)
 		default:
 			break;
 		}
+		radeon_hpd_set_polarity(rdev, radeon_connector->hpd.hpd);
 	}
 	if (rdev->irq.installed)
 		rs600_irq_set(rdev);