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Subject[16/38] drm/radeon/kms: Fix logic error in DP HPD handler
3.0-stable review patch.  If anyone has any objections, please let us know.

------------------
From: Alex Deucher <alexander.deucher@amd.com>

commit 5ba7ddf81634bfdf32d09261d2959e3f5b7c4263 upstream.

Only disable the pipe if the monitor is physically
disconnected. The previous logic also disabled the
pipe if the link was trained.

Fixes:
https://bugs.freedesktop.org/show_bug.cgi?id=41248

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
drivers/gpu/drm/radeon/radeon_connectors.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
--- a/drivers/gpu/drm/radeon/radeon_connectors.c
+++ b/drivers/gpu/drm/radeon/radeon_connectors.c
@@ -68,11 +68,11 @@ void radeon_connector_hotplug(struct drm
if (connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort) {
int saved_dpms = connector->dpms;

- if (radeon_hpd_sense(rdev, radeon_connector->hpd.hpd) &&
- radeon_dp_needs_link_train(radeon_connector))
- drm_helper_connector_dpms(connector, DRM_MODE_DPMS_ON);
- else
+ /* Only turn off the display it it's physically disconnected */
+ if (!radeon_hpd_sense(rdev, radeon_connector->hpd.hpd))
drm_helper_connector_dpms(connector, DRM_MODE_DPMS_OFF);
+ else if (radeon_dp_needs_link_train(radeon_connector))
+ drm_helper_connector_dpms(connector, DRM_MODE_DPMS_ON);
connector->dpms = saved_dpms;
}
}



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