drm: Remove bridge support from legacy helpers

DRM bridges are only used by atomic drivers, and none of them use the
legacy helpers. Drop bridge support from those helpers to prepare for
making the bridge operations atomic-aware.

Signed-off-by: Laurent Pinchart <[e-mail]>
Reviewed-by: Sean Paul <[e-mail]>
Acked-by: Daniel Vetter <[e-mail]>

drivers/gpu/drm/drm_crtc_helper.c

···
 	if (!encoder_funcs)
 		return;
 
-	drm_bridge_disable(encoder->bridge);
-
 	if (encoder_funcs->disable)
 		(*encoder_funcs->disable)(encoder);
 	else if (encoder_funcs->dpms)
 		(*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF);
-
-	drm_bridge_post_disable(encoder->bridge);
 }
 
 static void __drm_helper_disable_unused_functions(struct drm_device *dev)
···
 		if (!encoder_funcs)
 			continue;
 
-		ret = drm_bridge_mode_fixup(encoder->bridge,
-			mode, adjusted_mode);
-		if (!ret) {
-			DRM_DEBUG_KMS("Bridge fixup failed\n");
-			goto done;
-		}
-
 		encoder_funcs = encoder->helper_private;
 		if (encoder_funcs->mode_fixup) {
 			if (!(ret = encoder_funcs->mode_fixup(encoder, mode,
···
 		if (!encoder_funcs)
 			continue;
 
-		drm_bridge_disable(encoder->bridge);
-
 		/* Disable the encoders as the first thing we do. */
 		if (encoder_funcs->prepare)
 			encoder_funcs->prepare(encoder);
-
-		drm_bridge_post_disable(encoder->bridge);
 	}
 
 	drm_crtc_prepare_encoders(dev);
···
 			encoder->base.id, encoder->name, mode->name);
 		if (encoder_funcs->mode_set)
 			encoder_funcs->mode_set(encoder, mode, adjusted_mode);
-
-		drm_bridge_mode_set(encoder->bridge, mode, adjusted_mode);
 	}
 
 	/* Now enable the clocks, plane, pipe, and connectors that we set up. */
···
 		if (!encoder_funcs)
 			continue;
 
-		drm_bridge_pre_enable(encoder->bridge);
-
 		if (encoder_funcs->commit)
 			encoder_funcs->commit(encoder);
-
-		drm_bridge_enable(encoder->bridge);
 	}
 
 	/* Calculate and store various constants which
···
 /* Helper which handles bridge ordering around encoder dpms */
 static void drm_helper_encoder_dpms(struct drm_encoder *encoder, int mode)
 {
-	struct drm_bridge *bridge = encoder->bridge;
 	const struct drm_encoder_helper_funcs *encoder_funcs;
 
 	encoder_funcs = encoder->helper_private;
 	if (!encoder_funcs)
 		return;
 
-	if (mode == DRM_MODE_DPMS_ON)
-		drm_bridge_pre_enable(bridge);
-	else
-		drm_bridge_disable(bridge);
-
 	if (encoder_funcs->dpms)
 		encoder_funcs->dpms(encoder, mode);
-
-	if (mode == DRM_MODE_DPMS_ON)
-		drm_bridge_enable(bridge);
-	else
-		drm_bridge_post_disable(bridge);
 }
 
 static int drm_helper_choose_crtc_dpms(struct drm_crtc *crtc)