drm/i915: split out display debugfs to a separate file

The i915_debugfs.c has grown more than a little unwieldy. Split out the
display related debugfs code to a file of its own under display/,
initialized with a separate call. No functional changes.

v2:
- Also moved i915_frontbuffer_tracking, i915_gem_framebuffer,
  i915_power_domain_info, i915_dmc_info, i915_ipc_status (Ville)

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200211161451.6867-2-jani.nikula@intel.com

drivers/gpu/drm/i915/Makefile

@@ -68,6 +68,7 @@ i915-$(CONFIG_COMPAT)   += i915_ioc32.o
 i915-$(CONFIG_DEBUG_FS) += \
 	i915_debugfs.o \
 	i915_debugfs_params.o \
+	display/intel_display_debugfs.o \
 	display/intel_pipe_crc.o
 i915-$(CONFIG_PERF_EVENTS) += i915_pmu.o
 

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

+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2020 Intel Corporation
+ */
+
+#ifndef __INTEL_DISPLAY_DEBUGFS_H__
+#define __INTEL_DISPLAY_DEBUGFS_H__
+
+struct drm_connector;
+struct drm_i915_private;
+
+#ifdef CONFIG_DEBUG_FS
+int intel_display_debugfs_register(struct drm_i915_private *i915);
+int intel_connector_debugfs_add(struct drm_connector *connector);
+#else
+static inline int intel_display_debugfs_register(struct drm_i915_private *i915) { return 0; }
+static inline int intel_connector_debugfs_add(struct drm_connector *connector) { return 0; }
+#endif
+
+#endif /* __INTEL_DISPLAY_DEBUGFS_H__ */

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

@@ -49,6 +49,7 @@
 #include "intel_audio.h"
 #include "intel_connector.h"
 #include "intel_ddi.h"
+#include "intel_display_debugfs.h"
 #include "intel_display_types.h"
 #include "intel_dp.h"
 #include "intel_dp_link_training.h"
@@ -5851,7 +5852,7 @@ intel_dp_connector_register(struct drm_connector *connector)
 	if (ret)
 		return ret;
 
-	i915_debugfs_connector_add(connector);
+	intel_connector_debugfs_add(connector);
 
 	DRM_DEBUG_KMS("registering %s bus for %s\n",
 		      intel_dp->aux.name, connector->kdev->kobj.name);

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

@@ -45,6 +45,7 @@
 #include "intel_audio.h"
 #include "intel_connector.h"
 #include "intel_ddi.h"
+#include "intel_display_debugfs.h"
 #include "intel_display_types.h"
 #include "intel_dp.h"
 #include "intel_dpio_phy.h"
@@ -2818,7 +2819,7 @@ intel_hdmi_connector_register(struct drm_connector *connector)
 	if (ret)
 		return ret;
 
-	i915_debugfs_connector_add(connector);
+	intel_connector_debugfs_add(connector);
 
 	intel_hdmi_create_i2c_symlink(connector);
 

drivers/gpu/drm/i915/i915_debugfs.h

@@ -6,15 +6,17 @@
 #ifndef __I915_DEBUGFS_H__
 #define __I915_DEBUGFS_H__
 
-struct drm_i915_private;
 struct drm_connector;
+struct drm_i915_gem_object;
+struct drm_i915_private;
+struct seq_file;
 
 #ifdef CONFIG_DEBUG_FS
 int i915_debugfs_register(struct drm_i915_private *dev_priv);
-int i915_debugfs_connector_add(struct drm_connector *connector);
+void i915_debugfs_describe_obj(struct seq_file *m, struct drm_i915_gem_object *obj);
 #else
 static inline int i915_debugfs_register(struct drm_i915_private *dev_priv) { return 0; }
-static inline int i915_debugfs_connector_add(struct drm_connector *connector) { return 0; }
+static inline void i915_debugfs_describe_obj(struct seq_file *m, struct drm_i915_gem_object *obj) {}
 #endif
 
 #endif /* __I915_DEBUGFS_H__ */

drivers/gpu/drm/i915/i915_drv.c

@@ -51,6 +51,7 @@
 #include "display/intel_bw.h"
 #include "display/intel_cdclk.h"
 #include "display/intel_csr.h"
+#include "display/intel_display_debugfs.h"
 #include "display/intel_display_types.h"
 #include "display/intel_dp.h"
 #include "display/intel_fbdev.h"
@@ -1320,6 +1321,7 @@ static void i915_driver_register(struct drm_i915_private *dev_priv)
 	/* Reveal our presence to userspace */
 	if (drm_dev_register(dev, 0) == 0) {
 		i915_debugfs_register(dev_priv);
+		intel_display_debugfs_register(dev_priv);
 		i915_setup_sysfs(dev_priv);
 
 		/* Depends on sysfs having been initialized */