drm/dp: Move DP declarations into separate header file

Split the DP declarations from other helpers before moving the
DP functions into a separate module.

v2:
	* forward-declare struct drm_dp_aux (Jani)
	* add include guards in drm_dp_helper_internal.h

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Daniel Vetter <daniel@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20220114114535.29157-3-tzimmermann@suse.de

6 files changed, 37 insertions, 30 deletions

diff --git a/drivers/gpu/drm/drm_crtc_helper_internal.h b/drivers/gpu/drm/drm_crtc_helper_internal.h
index 61e09f8a8d0f..28e04e750130 100644
--- a/drivers/gpu/drm/drm_crtc_helper_internal.h
+++ b/drivers/gpu/drm/drm_crtc_helper_internal.h
@@ -28,36 +28,9 @@
 
 #include <drm/drm_connector.h>
 #include <drm/drm_crtc.h>
-#include <drm/drm_dp_helper.h>
 #include <drm/drm_encoder.h>
 #include <drm/drm_modes.h>
 
-/* drm_dp_aux_dev.c */
-#ifdef CONFIG_DRM_DP_AUX_CHARDEV
-int drm_dp_aux_dev_init(void);
-void drm_dp_aux_dev_exit(void);
-int drm_dp_aux_register_devnode(struct drm_dp_aux *aux);
-void drm_dp_aux_unregister_devnode(struct drm_dp_aux *aux);
-#else
-static inline int drm_dp_aux_dev_init(void)
-{
-	return 0;
-}
-
-static inline void drm_dp_aux_dev_exit(void)
-{
-}
-
-static inline int drm_dp_aux_register_devnode(struct drm_dp_aux *aux)
-{
-	return 0;
-}
-
-static inline void drm_dp_aux_unregister_devnode(struct drm_dp_aux *aux)
-{
-}
-#endif
-
 /* drm_probe_helper.c */
 enum drm_mode_status drm_crtc_mode_valid(struct drm_crtc *crtc,
 					 const struct drm_display_mode *mode);
diff --git a/drivers/gpu/drm/drm_dp_aux_dev.c b/drivers/gpu/drm/drm_dp_aux_dev.c
index 06b374cae956..0618dfe16660 100644
--- a/drivers/gpu/drm/drm_dp_aux_dev.c
+++ b/drivers/gpu/drm/drm_dp_aux_dev.c
@@ -40,7 +40,7 @@
 #include <drm/drm_dp_mst_helper.h>
 #include <drm/drm_print.h>
 
-#include "drm_crtc_helper_internal.h"
+#include "drm_dp_helper_internal.h"
 
 struct drm_dp_aux_dev {
 	unsigned index;
diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c
index 23f9073bc473..e995a0262ed7 100644
--- a/drivers/gpu/drm/drm_dp_helper.c
+++ b/drivers/gpu/drm/drm_dp_helper.c
@@ -35,7 +35,7 @@
 #include <drm/drm_dp_mst_helper.h>
 #include <drm/drm_panel.h>
 
-#include "drm_crtc_helper_internal.h"
+#include "drm_dp_helper_internal.h"
 
 struct dp_aux_backlight {
 	struct backlight_device *base;
diff --git a/drivers/gpu/drm/drm_dp_helper_internal.h b/drivers/gpu/drm/drm_dp_helper_internal.h
new file mode 100644
index 000000000000..8917fc3af9ec
--- /dev/null
+++ b/drivers/gpu/drm/drm_dp_helper_internal.h
@@ -0,0 +1,33 @@
+/* SPDX-License-Identifier: MIT */
+
+#ifndef DRM_DP_HELPER_INTERNAL_H
+#define DRM_DP_HELPER_INTERNAL_H
+
+struct drm_dp_aux;
+
+#ifdef CONFIG_DRM_DP_AUX_CHARDEV
+int drm_dp_aux_dev_init(void);
+void drm_dp_aux_dev_exit(void);
+int drm_dp_aux_register_devnode(struct drm_dp_aux *aux);
+void drm_dp_aux_unregister_devnode(struct drm_dp_aux *aux);
+#else
+static inline int drm_dp_aux_dev_init(void)
+{
+	return 0;
+}
+
+static inline void drm_dp_aux_dev_exit(void)
+{
+}
+
+static inline int drm_dp_aux_register_devnode(struct drm_dp_aux *aux)
+{
+	return 0;
+}
+
+static inline void drm_dp_aux_unregister_devnode(struct drm_dp_aux *aux)
+{
+}
+#endif
+
+#endif
diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c
index 3110df7e682e..bc3237a09c06 100644
--- a/drivers/gpu/drm/drm_dp_mst_topology.c
+++ b/drivers/gpu/drm/drm_dp_mst_topology.c
@@ -45,7 +45,7 @@
 #include <drm/drm_print.h>
 #include <drm/drm_probe_helper.h>
 
-#include "drm_crtc_helper_internal.h"
+#include "drm_dp_helper_internal.h"
 #include "drm_dp_mst_topology_internal.h"
 
 /**
diff --git a/drivers/gpu/drm/drm_kms_helper_common.c b/drivers/gpu/drm/drm_kms_helper_common.c
index 47e92400548d..88260d26409c 100644
--- a/drivers/gpu/drm/drm_kms_helper_common.c
+++ b/drivers/gpu/drm/drm_kms_helper_common.c
@@ -29,6 +29,7 @@
 
 #include <drm/drm_print.h>
 
+#include "drm_dp_helper_internal.h"
 #include "drm_crtc_helper_internal.h"
 
 MODULE_AUTHOR("David Airlie, Jesse Barnes");