drm/xe/rtp: Prefer helper macros from xe_args.h

Some custom implementation can be replaced with generic macros
from the linux/args.h or xe_args.h.
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240502223313.2527-4-michal.wajdeczko@intel.com

drivers/gpu/drm/xe/xe_rtp.h

@@ -341,7 +341,7 @@ struct xe_reg_sr;
  *	};
  */
 #define XE_RTP_RULES(...)							\
-	.n_rules = _XE_COUNT_ARGS(__VA_ARGS__),					\
+	.n_rules = COUNT_ARGS(__VA_ARGS__),					\
 	.rules = (const struct xe_rtp_rule[]) {					\
 		XE_RTP_PASTE_FOREACH(RULE_, COMMA, (__VA_ARGS__))	\
 	}
@@ -366,7 +366,7 @@ struct xe_reg_sr;
  *	};
  */
 #define XE_RTP_ACTIONS(...)							\
-	.n_actions = _XE_COUNT_ARGS(__VA_ARGS__),				\
+	.n_actions = COUNT_ARGS(__VA_ARGS__),					\
 	.actions = (const struct xe_rtp_action[]) {				\
 		XE_RTP_PASTE_FOREACH(ACTION_, COMMA, (__VA_ARGS__))	\
 	}

drivers/gpu/drm/xe/xe_rtp_helpers.h

@@ -10,22 +10,16 @@
 #error "This header is supposed to be included by xe_rtp.h only"
 #endif
 
+#include "xe_args.h"
+
 /*
  * Helper macros - not to be used outside this header.
  */
 #define _XE_ESC(...) __VA_ARGS__
-#define _XE_COUNT_ARGS(...) _XE_ESC(__XE_COUNT_ARGS(__VA_ARGS__, 5, 4, 3, 2, 1,))
-#define __XE_COUNT_ARGS(_, _5, _4, _3, _2, X_, ...) X_
-
-#define _XE_FIRST(...) _XE_ESC(__XE_FIRST(__VA_ARGS__,))
-#define __XE_FIRST(x_, ...) x_
-#define _XE_TUPLE_TAIL(...) _XE_ESC(__XE_TUPLE_TAIL(__VA_ARGS__))
-#define __XE_TUPLE_TAIL(x_, ...) (__VA_ARGS__)
 
-#define _XE_DROP_FIRST(x_, ...) __VA_ARGS__
+#define _XE_TUPLE_TAIL(...) (DROP_FIRST(__VA_ARGS__))
 
-#define _XE_RTP_CONCAT(a, b) __XE_RTP_CONCAT(a, b)
-#define __XE_RTP_CONCAT(a, b) XE_RTP_ ## a ## b
+#define _XE_RTP_CONCAT(a, b) CONCATENATE(XE_RTP_, CONCATENATE(a, b))
 
 #define __XE_RTP_PASTE_SEP_COMMA		,
 #define __XE_RTP_PASTE_SEP_BITWISE_OR		|
@@ -59,11 +53,11 @@
  *
  *	XE_RTP_TEST_FOO BANANA XE_RTP_TEST_BAR
  */
-#define XE_RTP_PASTE_FOREACH(prefix_, sep_, args_) _XE_ESC(_XE_RTP_CONCAT(PASTE_, _XE_COUNT_ARGS args_)(prefix_, sep_, args_))
-#define XE_RTP_PASTE_1(prefix_, sep_, args_) _XE_RTP_CONCAT(prefix_, _XE_FIRST args_)
-#define XE_RTP_PASTE_2(prefix_, sep_, args_) _XE_RTP_CONCAT(prefix_, _XE_FIRST args_) __XE_RTP_PASTE_SEP_ ## sep_ XE_RTP_PASTE_1(prefix_, sep_, _XE_TUPLE_TAIL args_)
-#define XE_RTP_PASTE_3(prefix_, sep_, args_) _XE_RTP_CONCAT(prefix_, _XE_FIRST args_) __XE_RTP_PASTE_SEP_ ## sep_ XE_RTP_PASTE_2(prefix_, sep_, _XE_TUPLE_TAIL args_)
-#define XE_RTP_PASTE_4(prefix_, sep_, args_) _XE_RTP_CONCAT(prefix_, _XE_FIRST args_) __XE_RTP_PASTE_SEP_ ## sep_ XE_RTP_PASTE_3(prefix_, sep_, _XE_TUPLE_TAIL args_)
+#define XE_RTP_PASTE_FOREACH(prefix_, sep_, args_) _XE_RTP_CONCAT(PASTE_, COUNT_ARGS args_)(prefix_, sep_, args_)
+#define XE_RTP_PASTE_1(prefix_, sep_, args_) _XE_RTP_CONCAT(prefix_, PICK_FIRST args_)
+#define XE_RTP_PASTE_2(prefix_, sep_, args_) _XE_RTP_CONCAT(prefix_, PICK_FIRST args_) __XE_RTP_PASTE_SEP_ ## sep_ XE_RTP_PASTE_1(prefix_, sep_, _XE_TUPLE_TAIL args_)
+#define XE_RTP_PASTE_3(prefix_, sep_, args_) _XE_RTP_CONCAT(prefix_, PICK_FIRST args_) __XE_RTP_PASTE_SEP_ ## sep_ XE_RTP_PASTE_2(prefix_, sep_, _XE_TUPLE_TAIL args_)
+#define XE_RTP_PASTE_4(prefix_, sep_, args_) _XE_RTP_CONCAT(prefix_, PICK_FIRST args_) __XE_RTP_PASTE_SEP_ ## sep_ XE_RTP_PASTE_3(prefix_, sep_, _XE_TUPLE_TAIL args_)
 
 /*
  * XE_RTP_DROP_CAST - Drop cast to convert a compound statement to a initializer
@@ -76,6 +70,6 @@
  *
  *	{ .a = 10 }
  */
-#define XE_RTP_DROP_CAST(...) _XE_ESC(_XE_DROP_FIRST _XE_ESC __VA_ARGS__)
+#define XE_RTP_DROP_CAST(...) _XE_ESC(DROP_FIRST _XE_ESC __VA_ARGS__)
 
 #endif