AST_IO_VGA_ENABLE_PORT 44 drivers/gpu/drm/ast/ast_post.c ast_io_write8(ast, AST_IO_VGA_ENABLE_PORT, 0x01); AST_IO_VGA_ENABLE_PORT 64 drivers/gpu/drm/ast/ast_post.c ch = ast_io_read8(ast, AST_IO_VGA_ENABLE_PORT);