drm/i915: split out display register macros to a separate file

This is a scripted split of the display related register macros from
i915_reg.h to display/intel_display_regs.h. As a starting point, move
all the macros that are only used in display code (or GVT). If there are
users in core i915 code or soc/, or no users anywhere, keep the macros
in i915_reg.h. This is done in groups of macros separated by blank
lines, moving the comments along with the groups.

Some manually picked macro groups are kept/moved regardless of the
heuristics above.

This is obviously a very crude approach. It's not perfect. But there are
4.2k lines in i915_reg.h, and its refactoring has ground to a halt. This
is the big hammer that splits the file to two, and enables further
cleanup.

Cc: Suraj Kandpal <suraj.kandpal@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Suraj Kandpal <suraj.kandpal@intel.com> # v2
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://lore.kernel.org/r/20250606102256.2080073-1-jani.nikula@intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>

Author: jnikula

drivers/gpu/drm/i915/display/g4x_dp.c

@@ -18,6 +18,7 @@
 #include "intel_crtc.h"
 #include "intel_de.h"
 #include "intel_display_power.h"
+#include "intel_display_regs.h"
 #include "intel_display_types.h"
 #include "intel_dp.h"
 #include "intel_dp_aux.h"

drivers/gpu/drm/i915/display/g4x_hdmi.c

@@ -15,6 +15,7 @@
 #include "intel_crtc.h"
 #include "intel_de.h"
 #include "intel_display_power.h"
+#include "intel_display_regs.h"
 #include "intel_display_types.h"
 #include "intel_dp_aux.h"
 #include "intel_dpio_phy.h"

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

@@ -10,6 +10,7 @@
 #include "i915_reg.h"
 #include "intel_color_regs.h"
 #include "intel_de.h"
+#include "intel_display_regs.h"
 #include "intel_display_rpm.h"
 #include "intel_display_types.h"
 #include "intel_pcode.h"

drivers/gpu/drm/i915/display/i9xx_display_sr.c

@@ -9,6 +9,7 @@
 #include "i9xx_display_sr.h"
 #include "i9xx_wm_regs.h"
 #include "intel_de.h"
+#include "intel_display_regs.h"
 #include "intel_gmbus.h"
 #include "intel_pci_config.h"
 

drivers/gpu/drm/i915/display/i9xx_plane.c

@@ -2,6 +2,7 @@
 /*
  * Copyright © 2020 Intel Corporation
  */
+
 #include <linux/kernel.h>
 
 #include <drm/drm_atomic_helper.h>
@@ -17,6 +18,7 @@
 #include "intel_atomic_plane.h"
 #include "intel_de.h"
 #include "intel_display_irq.h"
+#include "intel_display_regs.h"
 #include "intel_display_types.h"
 #include "intel_fb.h"
 #include "intel_fbc.h"

drivers/gpu/drm/i915/display/i9xx_wm.c

@@ -11,6 +11,7 @@
 #include "intel_bo.h"
 #include "intel_de.h"
 #include "intel_display.h"
+#include "intel_display_regs.h"
 #include "intel_display_trace.h"
 #include "intel_fb.h"
 #include "intel_mchbar_regs.h"

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

@@ -45,6 +45,7 @@
 #include "intel_crtc.h"
 #include "intel_ddi.h"
 #include "intel_de.h"
+#include "intel_display_regs.h"
 #include "intel_dsi.h"
 #include "intel_dsi_vbt.h"
 #include "intel_panel.h"

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

@@ -7,7 +7,6 @@
 #include <linux/kernel.h>
 #include <linux/pwm.h>
 #include <linux/string_helpers.h>
-
 #include <acpi/video.h>
 
 #include <drm/drm_file.h>
@@ -19,6 +18,7 @@
 #include "intel_backlight_regs.h"
 #include "intel_connector.h"
 #include "intel_de.h"
+#include "intel_display_regs.h"
 #include "intel_display_rpm.h"
 #include "intel_display_types.h"
 #include "intel_dp_aux_backlight.h"

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

@@ -6,13 +6,15 @@
 #include <drm/drm_atomic_state_helper.h>
 
 #include "soc/intel_dram.h"
+
 #include "i915_drv.h"
 #include "i915_reg.h"
 #include "i915_utils.h"
 #include "intel_atomic.h"
 #include "intel_bw.h"
 #include "intel_cdclk.h"
 #include "intel_display_core.h"
+#include "intel_display_regs.h"
 #include "intel_display_types.h"
 #include "intel_mchbar_regs.h"
 #include "intel_pcode.h"

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

@@ -38,6 +38,7 @@
 #include "intel_cdclk.h"
 #include "intel_crtc.h"
 #include "intel_de.h"
+#include "intel_display_regs.h"
 #include "intel_display_types.h"
 #include "intel_mchbar_regs.h"
 #include "intel_pci_config.h"