drm/i915: Move PCH modeset code to its own file

Start moving the code for PCH modeset sequence/etc. to
its own file.

Still not sure about the file name though...

Cc: Dave Airlie <airlied@redhat.com>
Cc: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211015071625.593-3-ville.syrjala@linux.intel.comReviewed-by: Dave Airlie <airlied@redhat.com>

drivers/gpu/drm/i915/Makefile

@@ -226,6 +226,7 @@ i915-y += \
 	display/intel_hotplug.o \
 	display/intel_lpe_audio.o \
 	display/intel_overlay.o \
+	display/intel_pch_display.o \
 	display/intel_pch_refclk.o \
 	display/intel_plane_initial.o \
 	display/intel_psr.o \

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

@@ -45,6 +45,7 @@
 #include "intel_fifo_underrun.h"
 #include "intel_gmbus.h"
 #include "intel_hotplug.h"
+#include "intel_pch_display.h"
 #include "intel_pch_refclk.h"
 
 /* Here's the desired hotplug mode */

drivers/gpu/drm/i915/display/intel_display.h

@@ -541,8 +541,6 @@ int vlv_get_cck_clock(struct drm_i915_private *dev_priv,
 		      const char *name, u32 reg, int ref_freq);
 int vlv_get_cck_clock_hpll(struct drm_i915_private *dev_priv,
 			   const char *name, u32 reg);
-void lpt_pch_enable(const struct intel_crtc_state *crtc_state);
-void lpt_disable_pch_transcoder(struct drm_i915_private *dev_priv);
 void intel_init_display_hooks(struct drm_i915_private *dev_priv);
 unsigned int intel_fb_xy_to_linear(int x, int y,
 				   const struct intel_plane_state *state,
@@ -578,9 +576,6 @@ struct drm_framebuffer *
 intel_framebuffer_create(struct drm_i915_gem_object *obj,
 			 struct drm_mode_fb_cmd2 *mode_cmd);
 
-void assert_pch_transcoder_disabled(struct drm_i915_private *dev_priv,
-				    enum pipe pipe);
-
 bool intel_fuzzy_clock_check(int clock1, int clock2);
 
 void intel_display_prepare_reset(struct drm_i915_private *dev_priv);

drivers/gpu/drm/i915/display/intel_pch_display.h

+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2021 Intel Corporation
+ */
+
+#ifndef _INTEL_PCH_DISPLAY_H_
+#define _INTEL_PCH_DISPLAY_H_
+
+enum pipe;
+struct drm_i915_private;
+struct intel_atomic_state;
+struct intel_crtc_state;
+
+void ilk_disable_pch_transcoder(struct drm_i915_private *dev_priv,
+				enum pipe pipe);
+void ilk_pch_enable(const struct intel_atomic_state *state,
+		    const struct intel_crtc_state *crtc_state);
+
+void lpt_disable_pch_transcoder(struct drm_i915_private *dev_priv);
+void lpt_pch_enable(const struct intel_crtc_state *crtc_state);
+
+#endif