drm/sysfb: Merge connector functions

Merge the connector functions of ofdrm and simpledrm. Replace the
code in each driver with the shared helpers. Set up callbacks with
initializer macros.

No effective code changes. The sysfb connector only returns the
preconfigured display mode.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://lore.kernel.org/r/20250401094056.32904-9-tzimmermann@suse.de

4 files changed, 33 insertions, 24 deletions

diff --git a/drivers/gpu/drm/sysfb/drm_sysfb_helper.c b/drivers/gpu/drm/sysfb/drm_sysfb_helper.c
index 6deeac81a41d..355e025c7c62 100644
--- a/drivers/gpu/drm/sysfb/drm_sysfb_helper.c
+++ b/drivers/gpu/drm/sysfb/drm_sysfb_helper.c
@@ -2,6 +2,8 @@
 
 #include <linux/module.h>
 
+#include <drm/drm_probe_helper.h>
+
 #include "drm_sysfb_helper.h"
 
 MODULE_DESCRIPTION("Helpers for DRM sysfb drivers");
@@ -30,3 +32,15 @@ struct drm_display_mode drm_sysfb_mode(unsigned int width,
 	}
 }
 EXPORT_SYMBOL(drm_sysfb_mode);
+
+/*
+ * Connector
+ */
+
+int drm_sysfb_connector_helper_get_modes(struct drm_connector *connector)
+{
+	struct drm_sysfb_device *sysfb = to_drm_sysfb_device(connector->dev);
+
+	return drm_connector_helper_get_modes_fixed(connector, &sysfb->fb_mode);
+}
+EXPORT_SYMBOL(drm_sysfb_connector_helper_get_modes);
diff --git a/drivers/gpu/drm/sysfb/drm_sysfb_helper.h b/drivers/gpu/drm/sysfb/drm_sysfb_helper.h
index cf80b291014a..7e3fe9fa5cff 100644
--- a/drivers/gpu/drm/sysfb/drm_sysfb_helper.h
+++ b/drivers/gpu/drm/sysfb/drm_sysfb_helper.h
@@ -38,6 +38,21 @@ static inline struct drm_sysfb_device *to_drm_sysfb_device(struct drm_device *de
 }
 
 /*
+ * Connector
+ */
+
+int drm_sysfb_connector_helper_get_modes(struct drm_connector *connector);
+
+#define DRM_SYSFB_CONNECTOR_HELPER_FUNCS \
+	.get_modes = drm_sysfb_connector_helper_get_modes
+
+#define DRM_SYSFB_CONNECTOR_FUNCS \
+	.reset = drm_atomic_helper_connector_reset, \
+	.fill_modes = drm_helper_probe_single_connector_modes, \
+	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, \
+	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state
+
+/*
  * Mode config
  */
 
diff --git a/drivers/gpu/drm/sysfb/ofdrm.c b/drivers/gpu/drm/sysfb/ofdrm.c
index 470b93f0f791..85db7441d1bf 100644
--- a/drivers/gpu/drm/sysfb/ofdrm.c
+++ b/drivers/gpu/drm/sysfb/ofdrm.c
@@ -998,23 +998,13 @@ static const struct drm_encoder_funcs ofdrm_encoder_funcs = {
 	.destroy = drm_encoder_cleanup,
 };
 
-static int ofdrm_connector_helper_get_modes(struct drm_connector *connector)
-{
-	struct drm_sysfb_device *sysfb = to_drm_sysfb_device(connector->dev);
-
-	return drm_connector_helper_get_modes_fixed(connector, &sysfb->fb_mode);
-}
-
 static const struct drm_connector_helper_funcs ofdrm_connector_helper_funcs = {
-	.get_modes = ofdrm_connector_helper_get_modes,
+	DRM_SYSFB_CONNECTOR_HELPER_FUNCS,
 };
 
 static const struct drm_connector_funcs ofdrm_connector_funcs = {
-	.reset = drm_atomic_helper_connector_reset,
-	.fill_modes = drm_helper_probe_single_connector_modes,
+	DRM_SYSFB_CONNECTOR_FUNCS,
 	.destroy = drm_connector_cleanup,
-	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
-	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 };
 
 static const struct drm_mode_config_funcs ofdrm_mode_config_funcs = {
diff --git a/drivers/gpu/drm/sysfb/simpledrm.c b/drivers/gpu/drm/sysfb/simpledrm.c
index 0cee8e1b2108..6d76d125d126 100644
--- a/drivers/gpu/drm/sysfb/simpledrm.c
+++ b/drivers/gpu/drm/sysfb/simpledrm.c
@@ -727,23 +727,13 @@ static const struct drm_encoder_funcs simpledrm_encoder_funcs = {
 	.destroy = drm_encoder_cleanup,
 };
 
-static int simpledrm_connector_helper_get_modes(struct drm_connector *connector)
-{
-	struct drm_sysfb_device *sysfb = to_drm_sysfb_device(connector->dev);
-
-	return drm_connector_helper_get_modes_fixed(connector, &sysfb->fb_mode);
-}
-
 static const struct drm_connector_helper_funcs simpledrm_connector_helper_funcs = {
-	.get_modes = simpledrm_connector_helper_get_modes,
+	DRM_SYSFB_CONNECTOR_HELPER_FUNCS,
 };
 
 static const struct drm_connector_funcs simpledrm_connector_funcs = {
-	.reset = drm_atomic_helper_connector_reset,
-	.fill_modes = drm_helper_probe_single_connector_modes,
+	DRM_SYSFB_CONNECTOR_FUNCS,
 	.destroy = drm_connector_cleanup,
-	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
-	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 };
 
 static const struct drm_mode_config_funcs simpledrm_mode_config_funcs = {