drm/radeon/kms: add some dp encoder/connector helper funcs
Used for dp1.2 support and for dp bridges.
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/radeon/radeon_encoders.c b/drivers/gpu/drm/radeon/radeon_encoders.c
index fd0087f..1c064e7 100644
--- a/drivers/gpu/drm/radeon/radeon_encoders.c
+++ b/drivers/gpu/drm/radeon/radeon_encoders.c
@@ -250,6 +250,25 @@
return NULL;
}
+bool radeon_encoder_is_dp_bridge(struct drm_encoder *encoder)
+{
+ struct drm_encoder *other_encoder = radeon_atom_get_external_encoder(encoder);
+
+ if (other_encoder) {
+ struct radeon_encoder *radeon_encoder = to_radeon_encoder(other_encoder);
+
+ switch (radeon_encoder->encoder_id) {
+ case ENCODER_OBJECT_ID_TRAVIS:
+ case ENCODER_OBJECT_ID_NUTMEG:
+ return true;
+ default:
+ return false;
+ }
+ }
+
+ return false;
+}
+
void radeon_panel_mode_fixup(struct drm_encoder *encoder,
struct drm_display_mode *adjusted_mode)
{
@@ -621,6 +640,10 @@
struct radeon_connector *radeon_connector;
struct radeon_connector_atom_dig *dig_connector;
+ /* dp bridges are always DP */
+ if (radeon_encoder_is_dp_bridge(encoder))
+ return ATOM_ENCODER_MODE_DP;
+
connector = radeon_get_connector_for_encoder(encoder);
if (!connector) {
switch (radeon_encoder->encoder_id) {