drm/arc: Inline arcpgu_drm_hdmi_init

Really not worth the function, much less the separate file now that
almost all the code is gone.
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Cc: Alexey Brodkin <abrodkin@synopsys.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210112084358.2771527-12-daniel.vetter@ffwll.ch

drivers/gpu/drm/arc/Makefile

 # SPDX-License-Identifier: GPL-2.0-only
-arcpgu-y := arcpgu_hdmi.o arcpgu_sim.o arcpgu_drv.o
+arcpgu-y := arcpgu_sim.o arcpgu_drv.o
 obj-$(CONFIG_DRM_ARCPGU) += arcpgu.o

drivers/gpu/drm/arc/arcpgu.h

@@ -34,7 +34,6 @@ static inline u32 arc_pgu_read(struct arcpgu_drm_private *arcpgu,
 	return ioread32(arcpgu->regs + reg);
 }
 
-int arcpgu_drm_hdmi_init(struct drm_device *drm, struct device_node *np);
 int arcpgu_drm_sim_init(struct drm_device *drm, struct device_node *np);
 
 #endif

drivers/gpu/drm/arc/arcpgu_drv.c

@@ -221,9 +221,15 @@ static int arcpgu_load(struct arcpgu_drm_private *arcpgu)
 	}
 
 	if (encoder_node) {
-		ret = arcpgu_drm_hdmi_init(drm, encoder_node);
-		of_node_put(encoder_node);
-		if (ret < 0)
+		struct drm_bridge *bridge;
+
+		/* Locate drm bridge from the hdmi encoder DT node */
+		bridge = of_drm_find_bridge(encoder_node);
+		if (!bridge)
+			return -EPROBE_DEFER;
+
+		ret = drm_simple_display_pipe_attach_bridge(&arcpgu->pipe, bridge);
+		if (ret)
 			return ret;
 	} else {
 		dev_info(drm->dev, "no encoder found. Assumed virtual LCD on simulation platform\n");

drivers/gpu/drm/arc/arcpgu_hdmi.c

-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * ARC PGU DRM driver.
- *
- * Copyright (C) 2016 Synopsys, Inc. (www.synopsys.com)
- */
-
-#include <drm/drm_bridge.h>
-#include <drm/drm_crtc.h>
-#include <drm/drm_encoder.h>
-#include <drm/drm_device.h>
-
-#include "arcpgu.h"
-
-int arcpgu_drm_hdmi_init(struct drm_device *drm, struct device_node *np)
-{
-	struct arcpgu_drm_private *arcpgu = dev_to_arcpgu(drm);
-	struct drm_bridge *bridge;
-
-	/* Locate drm bridge from the hdmi encoder DT node */
-	bridge = of_drm_find_bridge(np);
-	if (!bridge)
-		return -EPROBE_DEFER;
-
-	/* Link drm_bridge to encoder */
-	return drm_simple_display_pipe_attach_bridge(&arcpgu->pipe, bridge);
-}