drm/radeon/kms: fix tv dac conflict resolver

commit 08d075116db3592db218bfe0f554cd93c9e12505 upstream.

On systems with the tv dac shared between DVI and TV,
we can only use the dac for one of the connectors.
However, when using a digital monitor on the DVI port,
you can use the dac for the TV connector just fine.
Check the use_digital status when resolving the conflict.

Fixes fdo bug 27649, possibly others.

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

1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_connectors.c b/drivers/gpu/drm/radeon/radeon_connectors.c
index b3b0331ca2fe..2bdfbcd6d0e6 100644
--- a/drivers/gpu/drm/radeon/radeon_connectors.c
+++ b/drivers/gpu/drm/radeon/radeon_connectors.c
@@ -162,12 +162,14 @@ radeon_connector_analog_encoder_conflict_solve(struct drm_connector *connector,
 {
         struct drm_device *dev = connector->dev;
         struct drm_connector *conflict;
+        struct radeon_connector *radeon_conflict;
         int i;
 
         list_for_each_entry(conflict, &dev->mode_config.connector_list, head) {
                 if (conflict == connector)
                         continue;
 
+                radeon_conflict = to_radeon_connector(conflict);
                 for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
                         if (conflict->encoder_ids[i] == 0)
                                 break;
@@ -177,6 +179,9 @@ radeon_connector_analog_encoder_conflict_solve(struct drm_connector *connector,
                                 if (conflict->status != connector_status_connected)
                                         continue;
 
+                                if (radeon_conflict->use_digital)
+                                        continue;
+
                                 if (priority == true) {
                                         DRM_INFO("1: conflicting encoders switching off %s\n", drm_get_connector_name(conflict));
                                         DRM_INFO("in favor of %s\n", drm_get_connector_name(connector));