drm/ast: Move mode-detection helpers to Gen2 source files

Wide-screen modes are only available on Gen2 and later. Move the
detection helpers to the appropriate source file.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Jocelyn Falempe <jfalempe@redhat.com>
Link: https://lore.kernel.org/r/20250922083708.45564-3-tzimmermann@suse.de

3 files changed, 33 insertions, 27 deletions

diff --git a/drivers/gpu/drm/ast/ast_2100.c b/drivers/gpu/drm/ast/ast_2100.c
index 829e3b8b0d19..16a279ec8351 100644
--- a/drivers/gpu/drm/ast/ast_2100.c
+++ b/drivers/gpu/drm/ast/ast_2100.c
@@ -386,3 +386,34 @@ int ast_2100_post(struct ast_device *ast)
 
 	return 0;
 }
+
+/*
+ * Widescreen detection
+ */
+
+/* Try to detect WSXGA+ on Gen2+ */
+bool __ast_2100_detect_wsxga_p(struct ast_device *ast)
+{
+	u8 vgacrd0 = ast_get_index_reg(ast, AST_IO_VGACRI, 0xd0);
+
+	if (!(vgacrd0 & AST_IO_VGACRD0_VRAM_INIT_BY_BMC))
+		return true;
+	if (vgacrd0 & AST_IO_VGACRD0_IKVM_WIDESCREEN)
+		return true;
+
+	return false;
+}
+
+/* Try to detect WUXGA on Gen2+ */
+bool __ast_2100_detect_wuxga(struct ast_device *ast)
+{
+	u8 vgacrd1;
+
+	if (ast->support_fullhd) {
+		vgacrd1 = ast_get_index_reg(ast, AST_IO_VGACRI, 0xd1);
+		if (!(vgacrd1 & AST_IO_VGACRD1_SUPPORTS_WUXGA))
+			return true;
+	}
+
+	return false;
+}
diff --git a/drivers/gpu/drm/ast/ast_drv.h b/drivers/gpu/drm/ast/ast_drv.h
index 482d1eb79d64..c75600981251 100644
--- a/drivers/gpu/drm/ast/ast_drv.h
+++ b/drivers/gpu/drm/ast/ast_drv.h
@@ -421,6 +421,8 @@ extern const struct ast_vbios_dclk_info ast_2000_dclk_table[];
 
 /* ast_2100.c */
 int ast_2100_post(struct ast_device *ast);
+bool __ast_2100_detect_wsxga_p(struct ast_device *ast);
+bool __ast_2100_detect_wuxga(struct ast_device *ast);
 
 /* ast_2300.c */
 int ast_2300_post(struct ast_device *ast);
diff --git a/drivers/gpu/drm/ast/ast_main.c b/drivers/gpu/drm/ast/ast_main.c
index 3eea6a6cdacd..1678845274c7 100644
--- a/drivers/gpu/drm/ast/ast_main.c
+++ b/drivers/gpu/drm/ast/ast_main.c
@@ -36,33 +36,6 @@
 
 #include "ast_drv.h"
 
-/* Try to detect WSXGA+ on Gen2+ */
-static bool __ast_2100_detect_wsxga_p(struct ast_device *ast)
-{
-	u8 vgacrd0 = ast_get_index_reg(ast, AST_IO_VGACRI, 0xd0);
-
-	if (!(vgacrd0 & AST_IO_VGACRD0_VRAM_INIT_BY_BMC))
-		return true;
-	if (vgacrd0 & AST_IO_VGACRD0_IKVM_WIDESCREEN)
-		return true;
-
-	return false;
-}
-
-/* Try to detect WUXGA on Gen2+ */
-static bool __ast_2100_detect_wuxga(struct ast_device *ast)
-{
-	u8 vgacrd1;
-
-	if (ast->support_fullhd) {
-		vgacrd1 = ast_get_index_reg(ast, AST_IO_VGACRI, 0xd1);
-		if (!(vgacrd1 & AST_IO_VGACRD1_SUPPORTS_WUXGA))
-			return true;
-	}
-
-	return false;
-}
-
 static void ast_detect_widescreen(struct ast_device *ast)
 {
 	ast->support_wsxga_p = false;