drm/amd/display: Fix enum decl warnings

[Why]
warnings were triggered by enum forward declarations that are not
valid in C++ without an explicit underlying type.

[How]
- Replace problematic enum forward declarations with C++-safe forms where
  applicable.
- Use plain integer types for interface-only declarations that do not
  require strong enum typing.
- Update dependent winterface signatures and related type usage
  consistently.
- Add required include and type-visibility fixes to avoid follow-on parse
  and type-resolution issues.

Reviewed-by: Aric Cyr <aric.cyr@amd.com>
Signed-off-by: Gaghik Khachatrian <gaghik.khachatrian@amd.com>
Signed-off-by: James Lin <pinglei.lin@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dm_helpers.h

@@ -30,6 +30,7 @@
 #ifndef __DM_HELPERS__
 #define __DM_HELPERS__
 
+#include "modules/inc/mod_info_packet_types.h"
 #include "dc_types.h"
 #include "dc.h"
 

drivers/gpu/drm/amd/display/modules/inc/mod_color_types.h

@@ -0,0 +1,47 @@
+/*
+ * Copyright 2019 Advanced Micro Devices, Inc.
+ *
+ * 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 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
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
+ *
+ * Authors: AMD
+ *
+ */
+
+#ifndef MOD_COLOR_TYPES_H_
+#define MOD_COLOR_TYPES_H_
+
+enum predefined_gamut_type {
+	gamut_type_bt709,
+	gamut_type_bt601,
+	gamut_type_adobe_rgb,
+	gamut_type_srgb,
+	gamut_type_bt2020,
+	gamut_type_dcip3,
+	gamut_type_unknown,
+};
+
+enum predefined_white_point_type {
+	white_point_type_5000k_horizon,
+	white_point_type_6500k_noon,
+	white_point_type_7500k_north_sky,
+	white_point_type_9300k,
+	white_point_type_unknown,
+};
+
+#endif /* MOD_COLOR_TYPES_H_ */

drivers/gpu/drm/amd/display/modules/inc/mod_info_packet.h

@@ -27,6 +27,7 @@
 #define MOD_INFO_PACKET_H_
 
 #include "dm_services.h"
+#include "mod_info_packet_types.h"
 #include "mod_shared.h"
 //Forward Declarations
 struct dc_stream_state;
@@ -47,14 +48,6 @@ void mod_build_vsc_infopacket(const struct dc_stream_state *stream,
 void mod_build_hf_vsif_infopacket(const struct dc_stream_state *stream,
 		struct dc_info_packet *info_packet);
 
-enum adaptive_sync_type {
-	ADAPTIVE_SYNC_TYPE_NONE                  = 0,
-	ADAPTIVE_SYNC_TYPE_DP                    = 1,
-	FREESYNC_TYPE_PCON_IN_WHITELIST          = 2,
-	FREESYNC_TYPE_PCON_NOT_IN_WHITELIST      = 3,
-	ADAPTIVE_SYNC_TYPE_EDP                   = 4,
-};
-
 enum adaptive_sync_sdp_version {
 	AS_SDP_VER_0 = 0x0,
 	AS_SDP_VER_1 = 0x1,

drivers/gpu/drm/amd/display/modules/inc/mod_info_packet_types.h

@@ -0,0 +1,37 @@
+/*
+ * Copyright 2018 Advanced Micro Devices, Inc.
+ *
+ * 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 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
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
+ *
+ * Authors: AMD
+ *
+ */
+
+#ifndef MOD_INFO_PACKET_TYPES_H_
+#define MOD_INFO_PACKET_TYPES_H_
+
+enum adaptive_sync_type {
+	ADAPTIVE_SYNC_TYPE_NONE                  = 0,
+	ADAPTIVE_SYNC_TYPE_DP                    = 1,
+	FREESYNC_TYPE_PCON_IN_WHITELIST          = 2,
+	FREESYNC_TYPE_PCON_NOT_IN_WHITELIST      = 3,
+	ADAPTIVE_SYNC_TYPE_EDP                   = 4,
+};
+
+#endif /* MOD_INFO_PACKET_TYPES_H_ */