drm/i915/display: start high level display driver file

The only way to truly clean up intel_display.[ch] is to move stuff out
of them until there's absolutely nothing left.

Start moving the high level display driver entry points, i.e. functions
called from top level driver code only, to a new file, which we'll call
intel_display_driver.c. The intention is that there's no low-level
display code or details here. This is an in-between layer.

Initially, move intel_display_driver_register() and
intel_display_driver_unregister() there.
Reviewed-by: Gustavo Sousa <gustavo.sousa@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/e42cc037881a4c6042948a34bd4a9698f9e8487c.1681465222.git.jani.nikula@intel.com

drivers/gpu/drm/i915/Makefile

@@ -237,6 +237,7 @@ i915-y += \
 	display/intel_crtc_state_dump.o \
 	display/intel_cursor.o \
 	display/intel_display.o \
+	display/intel_display_driver.o \
 	display/intel_display_power.o \
 	display/intel_display_power_map.o \
 	display/intel_display_power_well.o \

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

@@ -32,7 +32,6 @@
 #include <linux/slab.h>
 #include <linux/string_helpers.h>
 #include <linux/vga_switcheroo.h>
-#include <acpi/video.h>
 
 #include <drm/display/drm_dp_helper.h>
 #include <drm/drm_atomic.h>
@@ -70,7 +69,6 @@
 #include "intel_crtc_state_dump.h"
 #include "intel_ddi.h"
 #include "intel_de.h"
-#include "intel_display_debugfs.h"
 #include "intel_display_power.h"
 #include "intel_display_types.h"
 #include "intel_dmc.h"
@@ -8839,57 +8837,6 @@ bool intel_modeset_probe_defer(struct pci_dev *pdev)
 	return false;
 }
 
-void intel_display_driver_register(struct drm_i915_private *i915)
-{
-	if (!HAS_DISPLAY(i915))
-		return;
-
-	/* Must be done after probing outputs */
-	intel_opregion_register(i915);
-	intel_acpi_video_register(i915);
-
-	intel_audio_init(i915);
-
-	intel_display_debugfs_register(i915);
-
-	/*
-	 * Some ports require correctly set-up hpd registers for
-	 * detection to work properly (leading to ghost connected
-	 * connector status), e.g. VGA on gm45.  Hence we can only set
-	 * up the initial fbdev config after hpd irqs are fully
-	 * enabled. We do it last so that the async config cannot run
-	 * before the connectors are registered.
-	 */
-	intel_fbdev_initial_config_async(i915);
-
-	/*
-	 * We need to coordinate the hotplugs with the asynchronous
-	 * fbdev configuration, for which we use the
-	 * fbdev->async_cookie.
-	 */
-	drm_kms_helper_poll_init(&i915->drm);
-}
-
-void intel_display_driver_unregister(struct drm_i915_private *i915)
-{
-	if (!HAS_DISPLAY(i915))
-		return;
-
-	intel_fbdev_unregister(i915);
-	intel_audio_deinit(i915);
-
-	/*
-	 * After flushing the fbdev (incl. a late async config which
-	 * will have delayed queuing of a hotplug event), then flush
-	 * the hotplug events.
-	 */
-	drm_kms_helper_poll_fini(&i915->drm);
-	drm_atomic_helper_shutdown(&i915->drm);
-
-	acpi_video_unregister();
-	intel_opregion_unregister(i915);
-}
-
 bool intel_scanout_needs_vtd_wa(struct drm_i915_private *i915)
 {
 	return DISPLAY_VER(i915) >= 6 && i915_vtd_active(i915);

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

@@ -518,9 +518,6 @@ void intel_set_plane_visible(struct intel_crtc_state *crtc_state,
 			     bool visible);
 void intel_plane_fixup_bitmasks(struct intel_crtc_state *crtc_state);
 
-void intel_display_driver_register(struct drm_i915_private *i915);
-void intel_display_driver_unregister(struct drm_i915_private *i915);
-
 void intel_update_watermarks(struct drm_i915_private *i915);
 
 /* modesetting */

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

+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2022-2023 Intel Corporation
+ *
+ * High level display driver entry points. This is a layer between top level
+ * driver code and low level display functionality; no low level display code or
+ * details here.
+ */
+
+#include <acpi/video.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_probe_helper.h>
+
+#include "i915_drv.h"
+#include "intel_acpi.h"
+#include "intel_audio.h"
+#include "intel_display_debugfs.h"
+#include "intel_display_driver.h"
+#include "intel_fbdev.h"
+#include "intel_opregion.h"
+
+void intel_display_driver_register(struct drm_i915_private *i915)
+{
+	if (!HAS_DISPLAY(i915))
+		return;
+
+	/* Must be done after probing outputs */
+	intel_opregion_register(i915);
+	intel_acpi_video_register(i915);
+
+	intel_audio_init(i915);
+
+	intel_display_debugfs_register(i915);
+
+	/*
+	 * Some ports require correctly set-up hpd registers for
+	 * detection to work properly (leading to ghost connected
+	 * connector status), e.g. VGA on gm45.  Hence we can only set
+	 * up the initial fbdev config after hpd irqs are fully
+	 * enabled. We do it last so that the async config cannot run
+	 * before the connectors are registered.
+	 */
+	intel_fbdev_initial_config_async(i915);
+
+	/*
+	 * We need to coordinate the hotplugs with the asynchronous
+	 * fbdev configuration, for which we use the
+	 * fbdev->async_cookie.
+	 */
+	drm_kms_helper_poll_init(&i915->drm);
+}
+
+void intel_display_driver_unregister(struct drm_i915_private *i915)
+{
+	if (!HAS_DISPLAY(i915))
+		return;
+
+	intel_fbdev_unregister(i915);
+	intel_audio_deinit(i915);
+
+	/*
+	 * After flushing the fbdev (incl. a late async config which
+	 * will have delayed queuing of a hotplug event), then flush
+	 * the hotplug events.
+	 */
+	drm_kms_helper_poll_fini(&i915->drm);
+	drm_atomic_helper_shutdown(&i915->drm);
+
+	acpi_video_unregister();
+	intel_opregion_unregister(i915);
+}

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

+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2022-2023 Intel Corporation
+ */
+
+#ifndef __INTEL_DISPLAY_DRIVER_H__
+#define __INTEL_DISPLAY_DRIVER_H__
+
+struct drm_i915_private;
+
+void intel_display_driver_register(struct drm_i915_private *i915);
+void intel_display_driver_unregister(struct drm_i915_private *i915);
+
+#endif /* __INTEL_DISPLAY_DRIVER_H__ */
+

drivers/gpu/drm/i915/i915_driver.c

@@ -48,6 +48,7 @@
 #include "display/intel_acpi.h"
 #include "display/intel_bw.h"
 #include "display/intel_cdclk.h"
+#include "display/intel_display_driver.h"
 #include "display/intel_display_types.h"
 #include "display/intel_dmc.h"
 #include "display/intel_dp.h"