1 files changed, 26 insertions, 0 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_encoders.c b/drivers/gpu/drm/radeon/radeon_encoders.c
index ae58b6849a2e..f678257c42e6 100644
--- a/drivers/gpu/drm/radeon/radeon_encoders.c
+++ b/drivers/gpu/drm/radeon/radeon_encoders.c
@@ -1520,6 +1520,7 @@ radeon_atom_dac_detect(struct drm_encoder *encoder, struct drm_connector *connec
 static void radeon_atom_encoder_prepare(struct drm_encoder *encoder)
 {
         struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
+        struct drm_connector *connector = radeon_get_connector_for_encoder(encoder);
 
         if (radeon_encoder->active_device &
             (ATOM_DEVICE_DFP_SUPPORT | ATOM_DEVICE_LCD_SUPPORT)) {
@@ -1531,6 +1532,13 @@ static void radeon_atom_encoder_prepare(struct drm_encoder *encoder)
         radeon_atom_output_lock(encoder, true);
         radeon_atom_encoder_dpms(encoder, DRM_MODE_DPMS_OFF);
 
+        /* select the clock/data port if it uses a router */
+        if (connector) {
+                struct radeon_connector *radeon_connector = to_radeon_connector(connector);
+                if (radeon_connector->router.cd_valid)
+                        radeon_router_select_cd_port(radeon_connector);
+        }
+
         /* this is needed for the pll/ss setup to work correctly in some cases */
         atombios_set_encoder_crtc_source(encoder);
 }
@@ -1547,6 +1555,23 @@ static void radeon_atom_encoder_disable(struct drm_encoder *encoder)
         struct radeon_device *rdev = dev->dev_private;
         struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
         struct radeon_encoder_atom_dig *dig;
+
+        /* check for pre-DCE3 cards with shared encoders;
+         * can't really use the links individually, so don't disable
+         * the encoder if it's in use by another connector
+         */
+        if (!ASIC_IS_DCE3(rdev)) {
+                struct drm_encoder *other_encoder;
+                struct radeon_encoder *other_radeon_encoder;
+
+                list_for_each_entry(other_encoder, &dev->mode_config.encoder_list, head) {
+                        other_radeon_encoder = to_radeon_encoder(other_encoder);
+                        if ((radeon_encoder->encoder_id == other_radeon_encoder->encoder_id) &&
+                            drm_helper_encoder_in_use(other_encoder))
+                                goto disable_done;
+                }
+        }
+
         radeon_atom_encoder_dpms(encoder, DRM_MODE_DPMS_OFF);
 
         switch (radeon_encoder->encoder_id) {
@@ -1586,6 +1611,7 @@ static void radeon_atom_encoder_disable(struct drm_encoder *encoder)
                 break;
         }
 
+disable_done:
         if (radeon_encoder_is_digital(encoder)) {
                 if (atombios_get_encoder_mode(encoder) == ATOM_ENCODER_MODE_HDMI)
                         r600_hdmi_disable(encoder);