drm/radeon/dce6: assign different audio pins to each encoder

This allows you to send different audio to each audio capable
display.
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/radeon/dce6_afmt.c

@@ -76,16 +76,35 @@ static void dce6_afmt_get_connected_pins(struct radeon_device *rdev)
 
 struct r600_audio_pin *dce6_audio_get_pin(struct radeon_device *rdev)
 {
-	int i;
+	struct drm_encoder *encoder;
+	struct radeon_encoder *radeon_encoder;
+	struct radeon_encoder_atom_dig *dig;
+	struct r600_audio_pin *pin = NULL;
+	int i, pin_count;
 
 	dce6_afmt_get_connected_pins(rdev);
 
 	for (i = 0; i < rdev->audio.num_pins; i++) {
-		if (rdev->audio.pin[i].connected)
-			return &rdev->audio.pin[i];
+		if (rdev->audio.pin[i].connected) {
+			pin = &rdev->audio.pin[i];
+			pin_count = 0;
+
+			list_for_each_entry(encoder, &rdev->ddev->mode_config.encoder_list, head) {
+				if (radeon_encoder_is_digital(encoder)) {
+					radeon_encoder = to_radeon_encoder(encoder);
+					dig = radeon_encoder->enc_priv;
+					if (dig->pin == pin)
+						pin_count++;
+				}
+			}
+
+			if (pin_count == 0)
+				return pin;
+		}
 	}
-	DRM_ERROR("No connected audio pins found!\n");
-	return NULL;
+	if (!pin)
+		DRM_ERROR("No connected audio pins found!\n");
+	return pin;
 }
 
 void dce6_afmt_select_pin(struct drm_encoder *encoder)