drm/ast: Initialize mode setting in ast_mode_config_init()

There's modesetting init code in ast_main.c. Move it to ast_mode.c and
merge it with the modesetting init code in ast_mode_init(). The result
is ast_mode_config_init(), which initalizes the whole modesetting.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200702115029.5281-15-tzimmermann@suse.de

drivers/gpu/drm/ast/ast_drv.h

@@ -286,7 +286,7 @@ struct ast_crtc_state {
 
 #define to_ast_crtc_state(state) container_of(state, struct ast_crtc_state, base)
 
-extern int ast_mode_init(struct drm_device *dev);
+int ast_mode_config_init(struct ast_private *ast);
 
 #define AST_MM_ALIGN_SHIFT 4
 #define AST_MM_ALIGN_MASK ((1 << AST_MM_ALIGN_SHIFT) - 1)

drivers/gpu/drm/ast/ast_main.c

@@ -31,7 +31,6 @@
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_crtc_helper.h>
 #include <drm/drm_gem.h>
-#include <drm/drm_gem_framebuffer_helper.h>
 #include <drm/drm_gem_vram_helper.h>
 
 #include "ast_drv.h"
@@ -379,13 +378,6 @@ static int ast_get_dram_info(struct drm_device *dev)
 	return 0;
 }
 
-static const struct drm_mode_config_funcs ast_mode_funcs = {
-	.fb_create = drm_gem_fb_create,
-	.mode_valid = drm_vram_helper_mode_valid,
-	.atomic_check = drm_atomic_helper_check,
-	.atomic_commit = drm_atomic_helper_commit,
-};
-
 static u32 ast_get_vram_info(struct drm_device *dev)
 {
 	struct ast_private *ast = to_ast_private(dev);
@@ -473,35 +465,10 @@ int ast_driver_load(struct drm_device *dev, unsigned long flags)
 	if (ret)
 		goto out_free;
 
-	ret = drmm_mode_config_init(dev);
-	if (ret)
-		goto out_free;
-
-	dev->mode_config.funcs = (void *)&ast_mode_funcs;
-	dev->mode_config.min_width = 0;
-	dev->mode_config.min_height = 0;
-	dev->mode_config.preferred_depth = 24;
-	dev->mode_config.prefer_shadow = 1;
-	dev->mode_config.fb_base = pci_resource_start(ast->dev->pdev, 0);
-
-	if (ast->chip == AST2100 ||
-	    ast->chip == AST2200 ||
-	    ast->chip == AST2300 ||
-	    ast->chip == AST2400 ||
-	    ast->chip == AST2500) {
-		dev->mode_config.max_width = 1920;
-		dev->mode_config.max_height = 2048;
-	} else {
-		dev->mode_config.max_width = 1600;
-		dev->mode_config.max_height = 1200;
-	}
-
-	ret = ast_mode_init(dev);
+	ret = ast_mode_config_init(ast);
 	if (ret)
 		goto out_free;
 
-	drm_mode_config_reset(dev);
-
 	return 0;
 out_free:
 	kfree(ast);

drivers/gpu/drm/ast/ast_mode.c

@@ -37,6 +37,7 @@
 #include <drm/drm_crtc.h>
 #include <drm/drm_crtc_helper.h>
 #include <drm/drm_fourcc.h>
+#include <drm/drm_gem_framebuffer_helper.h>
 #include <drm/drm_gem_vram_helper.h>
 #include <drm/drm_plane_helper.h>
 #include <drm/drm_probe_helper.h>
@@ -1069,15 +1070,49 @@ static int ast_connector_init(struct drm_device *dev)
 	return 0;
 }
 
-int ast_mode_init(struct drm_device *dev)
+/*
+ * Mode config
+ */
+
+static const struct drm_mode_config_funcs ast_mode_config_funcs = {
+	.fb_create = drm_gem_fb_create,
+	.mode_valid = drm_vram_helper_mode_valid,
+	.atomic_check = drm_atomic_helper_check,
+	.atomic_commit = drm_atomic_helper_commit,
+};
+
+int ast_mode_config_init(struct ast_private *ast)
 {
-	struct ast_private *ast = to_ast_private(dev);
+	struct drm_device *dev = ast->dev;
 	int ret;
 
 	ret = ast_cursor_init(ast);
 	if (ret)
 		return ret;
 
+	ret = drmm_mode_config_init(dev);
+	if (ret)
+		return ret;
+
+	dev->mode_config.funcs = &ast_mode_config_funcs;
+	dev->mode_config.min_width = 0;
+	dev->mode_config.min_height = 0;
+	dev->mode_config.preferred_depth = 24;
+	dev->mode_config.prefer_shadow = 1;
+	dev->mode_config.fb_base = pci_resource_start(ast->dev->pdev, 0);
+
+	if (ast->chip == AST2100 ||
+	    ast->chip == AST2200 ||
+	    ast->chip == AST2300 ||
+	    ast->chip == AST2400 ||
+	    ast->chip == AST2500) {
+		dev->mode_config.max_width = 1920;
+		dev->mode_config.max_height = 2048;
+	} else {
+		dev->mode_config.max_width = 1600;
+		dev->mode_config.max_height = 1200;
+	}
+
 	memset(&ast->primary_plane, 0, sizeof(ast->primary_plane));
 	ret = drm_universal_plane_init(dev, &ast->primary_plane, 0x01,
 				       &ast_primary_plane_funcs,
@@ -1107,6 +1142,8 @@ int ast_mode_init(struct drm_device *dev)
 	ast_encoder_init(dev);
 	ast_connector_init(dev);
 
+	drm_mode_config_reset(dev);
+
 	return 0;
 }