drm/radeon/evergreen_hdmi: Move 'evergreen_*()' and 'dce4_*()' HDMI prototypes to shared header

Fixes the following W=1 kernel build warning(s):

drivers/gpu/drm/radeon/evergreen_hdmi.c:37:6: warning: no previous prototype for ‘dce4_audio_enable’ [-Wmissing-prototypes]
drivers/gpu/drm/radeon/evergreen_hdmi.c:67:6: warning: no previous prototype for ‘evergreen_hdmi_update_acr’ [-Wmissing-prototypes]
drivers/gpu/drm/radeon/evergreen_hdmi.c:97:6: warning: no previous prototype for ‘dce4_afmt_write_latency_fields’ [-Wmissing-prototypes]
drivers/gpu/drm/radeon/evergreen_hdmi.c:119:6: warning: no previous prototype for ‘dce4_afmt_hdmi_write_speaker_allocation’ [-Wmissing-prototypes]
drivers/gpu/drm/radeon/evergreen_hdmi.c:137:6: warning: no previous prototype for ‘dce4_afmt_dp_write_speaker_allocation’ [-Wmissing-prototypes]
drivers/gpu/drm/radeon/evergreen_hdmi.c:155:6: warning: no previous prototype for ‘evergreen_hdmi_write_sad_regs’ [-Wmissing-prototypes]
drivers/gpu/drm/radeon/evergreen_hdmi.c:208:6: warning: no previous prototype for ‘evergreen_set_avi_packet’ [-Wmissing-prototypes]
drivers/gpu/drm/radeon/evergreen_hdmi.c:227:6: warning: no previous prototype for ‘dce4_hdmi_audio_set_dto’ [-Wmissing-prototypes]
drivers/gpu/drm/radeon/evergreen_hdmi.c:270:6: warning: no previous prototype for ‘dce4_dp_audio_set_dto’ [-Wmissing-prototypes]
drivers/gpu/drm/radeon/evergreen_hdmi.c:306:6: warning: no previous prototype for ‘dce4_set_vbi_packet’ [-Wmissing-prototypes]
drivers/gpu/drm/radeon/evergreen_hdmi.c:317:6: warning: no previous prototype for ‘dce4_hdmi_set_color_depth’ [-Wmissing-prototypes]
drivers/gpu/drm/radeon/evergreen_hdmi.c:354:6: warning: no previous prototype for ‘dce4_set_audio_packet’ [-Wmissing-prototypes]
drivers/gpu/drm/radeon/evergreen_hdmi.c:389:6: warning: no previous prototype for ‘dce4_set_mute’ [-Wmissing-prototypes]
drivers/gpu/drm/radeon/evergreen_hdmi.c:400:6: warning: no previous prototype for ‘evergreen_hdmi_enable’ [-Wmissing-prototypes]
drivers/gpu/drm/radeon/evergreen_hdmi.c:440:6: warning: no previous prototype for ‘evergreen_dp_enable’ [-Wmissing-prototypes]

Cc: Alex Deucher <[e-mail]>
Cc: "Christian König" <[e-mail]>
Cc: David Airlie <[e-mail]>
Cc: Daniel Vetter <[e-mail]>
Cc: [e-mail]
Cc: [e-mail]
Signed-off-by: Lee Jones <[e-mail]>
Signed-off-by: Alex Deucher <[e-mail]>

drivers/gpu/drm/radeon/evergreen_hdmi.c

···
 #include <linux/hdmi.h>
 
 #include <drm/radeon_drm.h>
+#include "evergreen_hdmi.h"
 #include "radeon.h"
 #include "radeon_asic.h"
 #include "radeon_audio.h"

drivers/gpu/drm/radeon/evergreen_hdmi.h

···
+/* evergreen_hdmi.h -- Private header for radeon driver -*- linux-c -*-
+ *
+ * Copyright 2008 Advanced Micro Devices, Inc.
+ * Copyright 2008 Red Hat Inc.
+ * Copyright 2009 Christian König.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ */
+
+#ifndef __EVERGREEN_HDMI_H__
+#define __EVERGREEN_HDMI_H__
+
+struct cea_sa;
+struct cea_sad;
+struct drm_connector;
+struct drm_display_mode;
+struct drm_encoder;
+struct r600_audio_pin;
+struct radeon_crtc;
+struct radeon_device;
+struct radeon_hdmi_acr;
+
+void evergreen_hdmi_write_sad_regs(struct drm_encoder *encoder,
+				   struct cea_sad *sads, int sad_count);
+void evergreen_set_avi_packet(struct radeon_device *rdev, u32 offset,
+			      unsigned char *buffer, size_t size);
+void evergreen_hdmi_update_acr(struct drm_encoder *encoder, long offset,
+			       const struct radeon_hdmi_acr *acr);
+void evergreen_hdmi_enable(struct drm_encoder *encoder, bool enable);
+void evergreen_dp_enable(struct drm_encoder *encoder, bool enable);
+
+void dce4_audio_enable(struct radeon_device *rdev, struct r600_audio_pin *pin,
+		       u8 enable_mask);
+void dce4_afmt_hdmi_write_speaker_allocation(struct drm_encoder *encoder,
+					     u8 *sadb, int sad_count);
+void dce4_afmt_dp_write_speaker_allocation(struct drm_encoder *encoder,
+					   u8 *sadb, int sad_count);
+void dce4_afmt_write_latency_fields(struct drm_encoder *encoder,
+				    struct drm_connector *connector,
+				    struct drm_display_mode *mode);
+void dce4_hdmi_audio_set_dto(struct radeon_device *rdev,
+			     struct radeon_crtc *crtc, unsigned int clock);
+void dce4_dp_audio_set_dto(struct radeon_device *rdev,
+			   struct radeon_crtc *crtc, unsigned int clock);
+void dce4_set_vbi_packet(struct drm_encoder *encoder, u32 offset);
+void dce4_hdmi_set_color_depth(struct drm_encoder *encoder,
+			       u32 offset, int bpc);
+void dce4_set_audio_packet(struct drm_encoder *encoder, u32 offset);
+void dce4_set_mute(struct drm_encoder *encoder, u32 offset, bool mute);
+
+#endif				/* __EVERGREEN_HDMI_H__ */

drivers/gpu/drm/radeon/radeon_audio.c

···
 #include <linux/gcd.h>
 
 #include <drm/drm_crtc.h>
+#include "evergreen_hdmi.h"
 #include "radeon.h"
 #include "atom.h"
 #include "radeon_audio.h"
 
 void r600_audio_enable(struct radeon_device *rdev, struct r600_audio_pin *pin,
 		u8 enable_mask);
-void dce4_audio_enable(struct radeon_device *rdev, struct r600_audio_pin *pin,
-		u8 enable_mask);
 void dce6_audio_enable(struct radeon_device *rdev, struct r600_audio_pin *pin,
 		u8 enable_mask);
 u32 dce6_endpoint_rreg(struct radeon_device *rdev, u32 offset, u32 reg);
 void dce6_endpoint_wreg(struct radeon_device *rdev,
 		u32 offset, u32 reg, u32 v);
-void evergreen_hdmi_write_sad_regs(struct drm_encoder *encoder,
-		struct cea_sad *sads, int sad_count);
 void dce6_afmt_write_sad_regs(struct drm_encoder *encoder,
 		struct cea_sad *sads, int sad_count);
-void dce4_afmt_hdmi_write_speaker_allocation(struct drm_encoder *encoder,
-		u8 *sadb, int sad_count);
-void dce4_afmt_dp_write_speaker_allocation(struct drm_encoder *encoder,
-		u8 *sadb, int sad_count);
 void dce6_afmt_hdmi_write_speaker_allocation(struct drm_encoder *encoder,
 		u8 *sadb, int sad_count);
 void dce6_afmt_dp_write_speaker_allocation(struct drm_encoder *encoder,
 		u8 *sadb, int sad_count);
-void dce4_afmt_write_latency_fields(struct drm_encoder *encoder,
-		struct drm_connector *connector, struct drm_display_mode *mode);
 void dce6_afmt_write_latency_fields(struct drm_encoder *encoder,
 		struct drm_connector *connector, struct drm_display_mode *mode);
 struct r600_audio_pin* r600_audio_get_pin(struct radeon_device *rdev);
···
 void dce6_afmt_select_pin(struct drm_encoder *encoder);
 void r600_hdmi_audio_set_dto(struct radeon_device *rdev,
 	struct radeon_crtc *crtc, unsigned int clock);
-void dce4_hdmi_audio_set_dto(struct radeon_device *rdev,
-	struct radeon_crtc *crtc, unsigned int clock);
-void dce4_dp_audio_set_dto(struct radeon_device *rdev,
-	struct radeon_crtc *crtc, unsigned int clock);
 void dce6_hdmi_audio_set_dto(struct radeon_device *rdev,
 	struct radeon_crtc *crtc, unsigned int clock);
 void dce6_dp_audio_set_dto(struct radeon_device *rdev,
 	struct radeon_crtc *crtc, unsigned int clock);
 void r600_set_avi_packet(struct radeon_device *rdev, u32 offset,
 	unsigned char *buffer, size_t size);
-void evergreen_set_avi_packet(struct radeon_device *rdev, u32 offset,
-	unsigned char *buffer, size_t size);
 void r600_hdmi_update_acr(struct drm_encoder *encoder, long offset,
 	const struct radeon_hdmi_acr *acr);
-void evergreen_hdmi_update_acr(struct drm_encoder *encoder, long offset,
-	const struct radeon_hdmi_acr *acr);
 void r600_set_vbi_packet(struct drm_encoder *encoder, u32 offset);
-void dce4_set_vbi_packet(struct drm_encoder *encoder, u32 offset);
-void dce4_hdmi_set_color_depth(struct drm_encoder *encoder,
-	u32 offset, int bpc);
 void r600_set_audio_packet(struct drm_encoder *encoder, u32 offset);
-void dce4_set_audio_packet(struct drm_encoder *encoder, u32 offset);
 void r600_set_mute(struct drm_encoder *encoder, u32 offset, bool mute);
-void dce4_set_mute(struct drm_encoder *encoder, u32 offset, bool mute);
 static void radeon_audio_hdmi_mode_set(struct drm_encoder *encoder,
 	struct drm_display_mode *mode);
 static void radeon_audio_dp_mode_set(struct drm_encoder *encoder,
 	struct drm_display_mode *mode);
 void r600_hdmi_enable(struct drm_encoder *encoder, bool enable);
-void evergreen_hdmi_enable(struct drm_encoder *encoder, bool enable);
-void evergreen_dp_enable(struct drm_encoder *encoder, bool enable);
 
 static const u32 pin_offsets[7] =
 {