drm/xe/display: remove intel_display_step_name() to simplify

The intel_display_step_name() is an unnecessary extra
indirection. Simplify by just adding a macro to map intel_step_name() to
xe_step_name().

We'll need to temporarily add a compat INTEL_DISPLAY_STEP() for this.
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Acked-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/cbea7def331cc9d2438da49ae344b9987f27cd12.1724180287.git.jani.nikula@intel.comSigned-off-by: Jani Nikula <jani.nikula@intel.com>

drivers/gpu/drm/i915/display/intel_dmc.c

@@ -391,7 +391,7 @@ static const struct stepping_info *
 intel_get_stepping_info(struct drm_i915_private *i915,
 			struct stepping_info *si)
 {
-	const char *step_name = intel_display_step_name(i915);
+	const char *step_name = intel_step_name(INTEL_DISPLAY_STEP(i915));
 
 	si->stepping = step_name[0];
 	si->substepping = step_name[1];

drivers/gpu/drm/i915/intel_step.c

@@ -275,8 +275,3 @@ const char *intel_step_name(enum intel_step step)
 		return "**";
 	}
 }
-
-const char *intel_display_step_name(struct drm_i915_private *i915)
-{
-	return intel_step_name(RUNTIME_INFO(i915)->step.display_step);
-}

drivers/gpu/drm/i915/intel_step.h

@@ -78,6 +78,5 @@ enum intel_step {
 
 void intel_step_init(struct drm_i915_private *i915);
 const char *intel_step_name(enum intel_step step);
-const char *intel_display_step_name(struct drm_i915_private *i915);
 
 #endif /* __INTEL_STEP_H__ */

drivers/gpu/drm/xe/compat-i915-headers/i915_drv.h

@@ -82,6 +82,8 @@ static inline struct drm_i915_private *kdev_to_i915(struct device *kdev)
 
 #define HAS_GMD_ID(xe) GRAPHICS_VERx100(xe) >= 1270
 
+#define INTEL_DISPLAY_STEP(xe) ((xe)->info.step.display)
+
 /* Workarounds not handled yet */
 #define IS_DISPLAY_STEP(xe, first, last) ({u8 __step = (xe)->info.step.display; first <= __step && __step < last; })
 

drivers/gpu/drm/xe/compat-i915-headers/intel_step.h

@@ -6,15 +6,8 @@
 #ifndef __INTEL_STEP_H__
 #define __INTEL_STEP_H__
 
-#include "xe_device_types.h"
 #include "xe_step.h"
 
-#define intel_display_step_name xe_display_step_name
-
-static inline
-const char *xe_display_step_name(struct xe_device *xe)
-{
-	return xe_step_name(xe->info.step.display);
-}
+#define intel_step_name xe_step_name
 
 #endif /* __INTEL_STEP_H__ */