drm/nouveau/kms/nv50: give more useful names to encoders

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/nv50_display.c

@@ -1721,7 +1721,8 @@ nv50_dac_create(struct drm_connector *connector, struct dcb_output *dcbe)
 	encoder = to_drm_encoder(nv_encoder);
 	encoder->possible_crtcs = dcbe->heads;
 	encoder->possible_clones = 0;
-	drm_encoder_init(connector->dev, encoder, &nv50_dac_func, type, NULL);
+	drm_encoder_init(connector->dev, encoder, &nv50_dac_func, type,
+			 "dac-%04x-%04x", dcbe->hasht, dcbe->hashm);
 	drm_encoder_helper_add(encoder, &nv50_dac_hfunc);
 
 	drm_mode_connector_attach_encoder(connector, encoder);
@@ -2227,7 +2228,8 @@ nv50_sor_create(struct drm_connector *connector, struct dcb_output *dcbe)
 	encoder = to_drm_encoder(nv_encoder);
 	encoder->possible_crtcs = dcbe->heads;
 	encoder->possible_clones = 0;
-	drm_encoder_init(connector->dev, encoder, &nv50_sor_func, type, NULL);
+	drm_encoder_init(connector->dev, encoder, &nv50_sor_func, type,
+			 "sor-%04x-%04x", dcbe->hasht, dcbe->hashm);
 	drm_encoder_helper_add(encoder, &nv50_sor_hfunc);
 
 	drm_mode_connector_attach_encoder(connector, encoder);
@@ -2431,7 +2433,8 @@ nv50_pior_create(struct drm_connector *connector, struct dcb_output *dcbe)
 	encoder = to_drm_encoder(nv_encoder);
 	encoder->possible_crtcs = dcbe->heads;
 	encoder->possible_clones = 0;
-	drm_encoder_init(connector->dev, encoder, &nv50_pior_func, type, NULL);
+	drm_encoder_init(connector->dev, encoder, &nv50_pior_func, type,
+			 "pior-%04x-%04x", dcbe->hasht, dcbe->hashm);
 	drm_encoder_helper_add(encoder, &nv50_pior_hfunc);
 
 	drm_mode_connector_attach_encoder(connector, encoder);