drm/vkms: Move default_config creation to its own function

Extract the initialization of the default configuration to a function.
Refactor, no functional changes.

Reviewed-by: Louis Chauvet <louis.chauvet@bootlin.com>
Co-developed-by: Louis Chauvet <louis.chauvet@bootlin.com>
Signed-off-by: Louis Chauvet <louis.chauvet@bootlin.com>
Signed-off-by: José Expósito <jose.exposito89@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250218101214.5790-6-jose.exposito89@gmail.com
Signed-off-by: Maxime Ripard <mripard@kernel.org>

4 files changed, 71 insertions, 5 deletions

diff --git a/drivers/gpu/drm/vkms/tests/vkms_config_test.c b/drivers/gpu/drm/vkms/tests/vkms_config_test.c
index a7060504f3dc..d8644a1e3e18 100644
--- a/drivers/gpu/drm/vkms/tests/vkms_config_test.c
+++ b/drivers/gpu/drm/vkms/tests/vkms_config_test.c
@@ -6,6 +6,12 @@
 
 MODULE_IMPORT_NS("EXPORTED_FOR_KUNIT_TESTING");
 
+struct default_config_case {
+	bool enable_cursor;
+	bool enable_writeback;
+	bool enable_overlay;
+};
+
 static void vkms_config_test_empty_config(struct kunit *test)
 {
 	struct vkms_config *config;
@@ -16,8 +22,40 @@ static void vkms_config_test_empty_config(struct kunit *test)
 	vkms_config_destroy(config);
 }
 
+static struct default_config_case default_config_cases[] = {
+	{ false, false, false },
+	{ true, false, false },
+	{ true, true, false },
+	{ true, false, true },
+	{ false, true, false },
+	{ false, true, true },
+	{ false, false, true },
+	{ true, true, true },
+};
+
+KUNIT_ARRAY_PARAM(default_config, default_config_cases, NULL);
+
+static void vkms_config_test_default_config(struct kunit *test)
+{
+	const struct default_config_case *params = test->param_value;
+	struct vkms_config *config;
+
+	config = vkms_config_default_create(params->enable_cursor,
+					    params->enable_writeback,
+					    params->enable_overlay);
+	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, config);
+
+	KUNIT_EXPECT_EQ(test, config->cursor, params->enable_cursor);
+	KUNIT_EXPECT_EQ(test, config->writeback, params->enable_writeback);
+	KUNIT_EXPECT_EQ(test, config->overlay, params->enable_overlay);
+
+	vkms_config_destroy(config);
+}
+
 static struct kunit_case vkms_config_test_cases[] = {
 	KUNIT_CASE(vkms_config_test_empty_config),
+	KUNIT_CASE_PARAM(vkms_config_test_default_config,
+			 default_config_gen_params),
 	{}
 };
 
diff --git a/drivers/gpu/drm/vkms/vkms_config.c b/drivers/gpu/drm/vkms/vkms_config.c
index 42caa421876e..0af8e6dc0a01 100644
--- a/drivers/gpu/drm/vkms/vkms_config.c
+++ b/drivers/gpu/drm/vkms/vkms_config.c
@@ -20,6 +20,24 @@ struct vkms_config *vkms_config_create(void)
 }
 EXPORT_SYMBOL_IF_KUNIT(vkms_config_create);
 
+struct vkms_config *vkms_config_default_create(bool enable_cursor,
+					       bool enable_writeback,
+					       bool enable_overlay)
+{
+	struct vkms_config *config;
+
+	config = vkms_config_create();
+	if (IS_ERR(config))
+		return config;
+
+	config->cursor = enable_cursor;
+	config->writeback = enable_writeback;
+	config->overlay = enable_overlay;
+
+	return config;
+}
+EXPORT_SYMBOL_IF_KUNIT(vkms_config_default_create);
+
 void vkms_config_destroy(struct vkms_config *config)
 {
 	kfree(config);
diff --git a/drivers/gpu/drm/vkms/vkms_config.h b/drivers/gpu/drm/vkms/vkms_config.h
index ced10f56a812..d0868750826a 100644
--- a/drivers/gpu/drm/vkms/vkms_config.h
+++ b/drivers/gpu/drm/vkms/vkms_config.h
@@ -32,6 +32,20 @@ struct vkms_config {
 struct vkms_config *vkms_config_create(void);
 
 /**
+ * vkms_config_default_create() - Create the configuration for the default device
+ * @enable_cursor: Create or not a cursor plane
+ * @enable_writeback: Create or not a writeback connector
+ * @enable_overlay: Create or not overlay planes
+ *
+ * Returns:
+ * The default vkms_config or an error. Call vkms_config_destroy() to free the
+ * returned configuration.
+ */
+struct vkms_config *vkms_config_default_create(bool enable_cursor,
+					       bool enable_writeback,
+					       bool enable_overlay);
+
+/**
  * vkms_config_destroy() - Free a VKMS configuration
  * @config: vkms_config to free
  */
diff --git a/drivers/gpu/drm/vkms/vkms_drv.c b/drivers/gpu/drm/vkms/vkms_drv.c
index 37de0658e6ee..582d5825f42b 100644
--- a/drivers/gpu/drm/vkms/vkms_drv.c
+++ b/drivers/gpu/drm/vkms/vkms_drv.c
@@ -211,14 +211,10 @@ static int __init vkms_init(void)
 	int ret;
 	struct vkms_config *config;
 
-	config = vkms_config_create();
+	config = vkms_config_default_create(enable_cursor, enable_writeback, enable_overlay);
 	if (IS_ERR(config))
 		return PTR_ERR(config);
 
-	config->cursor = enable_cursor;
-	config->writeback = enable_writeback;
-	config->overlay = enable_overlay;
-
 	ret = vkms_create(config);
 	if (ret) {
 		vkms_config_destroy(config);