drm/i915: Introduce g4x_dp.c

Move the g4x+ DP code into a new file. This will leave mostly
platform agnostic code in intel_dp.c. Well, the misplaced phy
test stuff pretty much ruins that, but let's squint real hard
for now.

v2: Add comment exlaining which platforms are covered (Daniel)
    Leave intel_dp_unused_lane_mask() be since it is pretty generic

Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210318161015.22070-6-ville.syrjala@linux.intel.com

drivers/gpu/drm/i915/Makefile

@@ -240,6 +240,7 @@ i915-y += \
 	display/dvo_ns2501.o \
 	display/dvo_sil164.o \
 	display/dvo_tfp410.o \
+	display/g4x_dp.o \
 	display/icl_dsi.o \
 	display/intel_crt.o \
 	display/intel_ddi.o \

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

@@ -0,0 +1,31 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2020 Intel Corporation
+ */
+
+#ifndef _G4X_DP_H_
+#define _G4X_DP_H_
+
+#include <linux/types.h>
+
+#include "i915_reg.h"
+
+enum pipe;
+enum port;
+struct drm_i915_private;
+struct intel_crtc_state;
+struct intel_dp;
+struct intel_encoder;
+
+const struct dpll *vlv_get_dpll(struct drm_i915_private *i915);
+enum pipe vlv_active_pipe(struct intel_dp *intel_dp);
+void intel_dp_set_clock(struct intel_encoder *encoder,
+			struct intel_crtc_state *pipe_config);
+bool intel_dp_port_enabled(struct drm_i915_private *dev_priv,
+			   i915_reg_t dp_reg, enum port port,
+			   enum pipe *pipe);
+bool intel_dp_init(struct drm_i915_private *dev_priv,
+		   i915_reg_t output_reg,
+		   enum port port);
+
+#endif

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

@@ -66,6 +66,7 @@
 
 #include "gt/intel_rps.h"
 
+#include "g4x_dp.h"
 #include "i915_drv.h"
 #include "intel_acpi.h"
 #include "intel_atomic.h"

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

@@ -37,11 +37,6 @@ void intel_dp_adjust_compliance_config(struct intel_dp *intel_dp,
 bool intel_dp_limited_color_range(const struct intel_crtc_state *crtc_state,
 				  const struct drm_connector_state *conn_state);
 int intel_dp_min_bpp(enum intel_output_format output_format);
-bool intel_dp_port_enabled(struct drm_i915_private *dev_priv,
-			   i915_reg_t dp_reg, enum port port,
-			   enum pipe *pipe);
-bool intel_dp_init(struct drm_i915_private *dev_priv, i915_reg_t output_reg,
-		   enum port port);
 bool intel_dp_init_connector(struct intel_digital_port *dig_port,
 			     struct intel_connector *intel_connector);
 void intel_dp_set_link_params(struct intel_dp *intel_dp,
@@ -131,7 +126,6 @@ bool intel_dp_initial_fastset_check(struct intel_encoder *encoder,
 				    struct intel_crtc_state *crtc_state);
 void intel_dp_sync_state(struct intel_encoder *encoder,
 			 const struct intel_crtc_state *crtc_state);
-const struct dpll *vlv_get_dpll(struct drm_i915_private *i915);
 
 void intel_dp_check_frl_training(struct intel_dp *intel_dp);
 void intel_dp_pcon_dsc_configure(struct intel_dp *intel_dp,

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

@@ -3,6 +3,7 @@
  * Copyright © 2020 Intel Corporation
  */
 
+#include "g4x_dp.h"
 #include "i915_drv.h"
 #include "intel_display_types.h"
 #include "intel_dp.h"