From: Greg KH <gre...@linuxfoundation.org>
3.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Jerome Glisse <jgli...@redhat.com>
commit 266dcba541a1ef7e5d82d9e67c67fde2910636e8 upstream.
No need to retrain the link for passive adapters.
v2: agd5f
- no passive DP to VGA adapters, update comments
- assign radeon_connector_atom_dig after we are sure
we have a digital connector as analog connectors
have different private data.
- get new sink type before checking for retrain. No
need to check if it's no longer a DP connection.
Signed-off-by: Jerome Glisse <jgli...@redhat.com>
Signed-off-by: Alex Deucher <alexander.deuc...@amd.com>
Signed-off-by: Dave Airlie <airl...@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
drivers/gpu/drm/radeon/radeon_connectors.c | 27 ++++++++++++++++++++-------
1 file changed, 20 insertions(+), 7 deletions(-)
--- a/drivers/gpu/drm/radeon/radeon_connectors.c
+++ b/drivers/gpu/drm/radeon/radeon_connectors.c
@@ -64,14 +64,27 @@ void radeon_connector_hotplug(struct drm
/* just deal with DP (not eDP) here. */
if (connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort) {
- int saved_dpms = connector->dpms;
+ struct radeon_connector_atom_dig *dig_connector =
+ radeon_connector->con_priv;
- /* 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;
+ /* if existing sink type was not DP no need to retrain */
+ if (dig_connector->dp_sink_type !=
CONNECTOR_OBJECT_ID_DISPLAYPORT)
+ return;
+
+ /* first get sink type as it may be reset after (un)plug */
+ dig_connector->dp_sink_type =
radeon_dp_getsinktype(radeon_connector);
+ /* don't do anything if sink is not display port, i.e.,
+ * passive dp->(dvi|hdmi) adaptor
+ */
+ if (dig_connector->dp_sink_type ==
CONNECTOR_OBJECT_ID_DISPLAYPORT) {
+ int saved_dpms = connector->dpms;
+ /* Only turn off the display if 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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