diff --git a/drivers/gpu/drm/selftests/Makefile b/drivers/gpu/drm/selftests/Makefile
index 1bb73dc4c88c..971cfe17be68 100644
--- a/drivers/gpu/drm/selftests/Makefile
+++ b/drivers/gpu/drm/selftests/Makefile
@@ -1,5 +1,5 @@
 test-drm_modeset-y := test-drm_modeset_common.o test-drm_plane_helper.o \
                       test-drm_format.o test-drm_framebuffer.o \
-		      test-drm_damage_helper.o
+		      test-drm_damage_helper.o test-drm_cmdline_parser.o
 
 obj-$(CONFIG_DRM_DEBUG_SELFTEST) += test-drm_mm.o test-drm_modeset.o
diff --git a/drivers/gpu/drm/selftests/drm_cmdline_selftests.h b/drivers/gpu/drm/selftests/drm_cmdline_selftests.h
new file mode 100644
index 000000000000..86afe546fd0e
--- /dev/null
+++ b/drivers/gpu/drm/selftests/drm_cmdline_selftests.h
@@ -0,0 +1,49 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* List each unit test as selftest(function)
+ *
+ * The name is used as both an enum and expanded as igt__name to create
+ * a module parameter. It must be unique and legal for a C identifier.
+ *
+ * Tests are executed in order by igt/drm_mm
+ */
+
+#define cmdline_test(test)	selftest(test, test)
+
+cmdline_test(drm_cmdline_test_res)
+cmdline_test(drm_cmdline_test_res_vesa)
+cmdline_test(drm_cmdline_test_res_vesa_rblank)
+cmdline_test(drm_cmdline_test_res_rblank)
+cmdline_test(drm_cmdline_test_res_bpp)
+cmdline_test(drm_cmdline_test_res_refresh)
+cmdline_test(drm_cmdline_test_res_bpp_refresh)
+cmdline_test(drm_cmdline_test_res_bpp_refresh_interlaced)
+cmdline_test(drm_cmdline_test_res_bpp_refresh_margins)
+cmdline_test(drm_cmdline_test_res_bpp_refresh_force_off)
+cmdline_test(drm_cmdline_test_res_bpp_refresh_force_on_off)
+cmdline_test(drm_cmdline_test_res_bpp_refresh_force_on)
+cmdline_test(drm_cmdline_test_res_bpp_refresh_force_on_analog)
+cmdline_test(drm_cmdline_test_res_bpp_refresh_force_on_digital)
+cmdline_test(drm_cmdline_test_res_bpp_refresh_interlaced_margins_force_on)
+cmdline_test(drm_cmdline_test_res_margins_force_on)
+cmdline_test(drm_cmdline_test_res_vesa_margins)
+cmdline_test(drm_cmdline_test_res_invalid_mode)
+cmdline_test(drm_cmdline_test_res_bpp_wrong_place_mode)
+cmdline_test(drm_cmdline_test_name)
+cmdline_test(drm_cmdline_test_name_bpp)
+cmdline_test(drm_cmdline_test_name_refresh)
+cmdline_test(drm_cmdline_test_name_bpp_refresh)
+cmdline_test(drm_cmdline_test_name_refresh_wrong_mode)
+cmdline_test(drm_cmdline_test_name_refresh_invalid_mode)
+cmdline_test(drm_cmdline_test_name_option)
+cmdline_test(drm_cmdline_test_name_bpp_option)
+cmdline_test(drm_cmdline_test_rotate_0)
+cmdline_test(drm_cmdline_test_rotate_90)
+cmdline_test(drm_cmdline_test_rotate_180)
+cmdline_test(drm_cmdline_test_rotate_270)
+cmdline_test(drm_cmdline_test_rotate_invalid_val)
+cmdline_test(drm_cmdline_test_rotate_truncated)
+cmdline_test(drm_cmdline_test_hmirror)
+cmdline_test(drm_cmdline_test_vmirror)
+cmdline_test(drm_cmdline_test_overscan_options)
+cmdline_test(drm_cmdline_test_multiple_options)
+cmdline_test(drm_cmdline_test_invalid_option)
diff --git a/drivers/gpu/drm/selftests/test-drm_cmdline_parser.c b/drivers/gpu/drm/selftests/test-drm_cmdline_parser.c
new file mode 100644
index 000000000000..ae94b076acd4
--- /dev/null
+++ b/drivers/gpu/drm/selftests/test-drm_cmdline_parser.c
@@ -0,0 +1,843 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2019 Bootlin
+ */
+
+#define pr_fmt(fmt) "drm_cmdline: " fmt
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+
+#include <drm/drm_connector.h>
+#include <drm/drm_modes.h>
+
+#define TESTS "drm_cmdline_selftests.h"
+#include "drm_selftest.h"
+#include "test-drm_modeset_common.h"
+
+static int drm_cmdline_test_res(void *ignored)
+{
+	struct drm_connector connector = { 0 };
+	struct drm_cmdline_mode mode = { 0 };
+
+	FAIL_ON(!drm_mode_parse_command_line_for_connector("720x480",
+							      &connector,
+							      &mode));
+	FAIL_ON(!mode.specified);
+	FAIL_ON(mode.xres != 720);
+	FAIL_ON(mode.yres != 480);
+
+	FAIL_ON(mode.refresh_specified);
+
+	FAIL_ON(mode.bpp_specified);
+
+	FAIL_ON(mode.rb);
+	FAIL_ON(mode.cvt);
+	FAIL_ON(mode.interlace);
+	FAIL_ON(mode.margins);
+	FAIL_ON(mode.force != DRM_FORCE_UNSPECIFIED);
+
+	return 0;
+}
+
+static int drm_cmdline_test_res_vesa(void *ignored)
+{
+	struct drm_connector connector = { 0 };
+	struct drm_cmdline_mode mode = { 0 };
+
+	FAIL_ON(!drm_mode_parse_command_line_for_connector("720x480M",
+							      &connector,
+							      &mode));
+	FAIL_ON(!mode.specified);
+	FAIL_ON(mode.xres != 720);
+	FAIL_ON(mode.yres != 480);
+
+	FAIL_ON(mode.refresh_specified);
+
+	FAIL_ON(mode.bpp_specified);
+
+	FAIL_ON(mode.rb);
+	FAIL_ON(!mode.cvt);
+	FAIL_ON(mode.interlace);
+	FAIL_ON(mode.margins);
+	FAIL_ON(mode.force != DRM_FORCE_UNSPECIFIED);
+
+	return 0;
+}
+
+static int drm_cmdline_test_res_vesa_rblank(void *ignored)
+{
+	struct drm_connector connector = { 0 };
+	struct drm_cmdline_mode mode = { 0 };
+
+	FAIL_ON(!drm_mode_parse_command_line_for_connector("720x480MR",
+							      &connector,
+							      &mode));
+	FAIL_ON(!mode.specified);
+	FAIL_ON(mode.xres != 720);
+	FAIL_ON(mode.yres != 480);
+
+	FAIL_ON(mode.refresh_specified);
+
+	FAIL_ON(mode.bpp_specified);
+
+	FAIL_ON(!mode.rb);
+	FAIL_ON(!mode.cvt);
+	FAIL_ON(mode.interlace);
+	FAIL_ON(mode.margins);
+	FAIL_ON(mode.force != DRM_FORCE_UNSPECIFIED);
+
+	return 0;
+}
+
+static int drm_cmdline_test_res_rblank(void *ignored)
+{
+	struct drm_connector connector = { 0 };
+	struct drm_cmdline_mode mode = { 0 };
+
+	FAIL_ON(!drm_mode_parse_command_line_for_connector("720x480R",
+							      &connector,
+							      &mode));
+	FAIL_ON(!mode.specified);
+	FAIL_ON(mode.xres != 720);
+	FAIL_ON(mode.yres != 480);
+
+	FAIL_ON(mode.refresh_specified);
+
+	FAIL_ON(mode.bpp_specified);
+
+	FAIL_ON(!mode.rb);
+	FAIL_ON(mode.cvt);
+	FAIL_ON(mode.interlace);
+	FAIL_ON(mode.margins);
+	FAIL_ON(mode.force != DRM_FORCE_UNSPECIFIED);
+
+	return 0;
+}
+
+static int drm_cmdline_test_res_bpp(void *ignored)
+{
+	struct drm_connector connector = { 0 };
+	struct drm_cmdline_mode mode = { 0 };
+
+	FAIL_ON(!drm_mode_parse_command_line_for_connector("720x480-24",
+							      &connector,
+							      &mode));
+	FAIL_ON(!mode.specified);
+	FAIL_ON(mode.xres != 720);
+	FAIL_ON(mode.yres != 480);
+
+	FAIL_ON(mode.refresh_specified);
+
+	FAIL_ON(!mode.bpp_specified);
+	FAIL_ON(mode.bpp != 24);
+
+	FAIL_ON(mode.rb);
+	FAIL_ON(mode.cvt);
+	FAIL_ON(mode.interlace);
+	FAIL_ON(mode.margins);
+	FAIL_ON(mode.force != DRM_FORCE_UNSPECIFIED);
+
+	return 0;
+}
+
+static int drm_cmdline_test_res_refresh(void *ignored)
+{
+	struct drm_connector connector = { 0 };
+	struct drm_cmdline_mode mode = { 0 };
+
+	FAIL_ON(!drm_mode_parse_command_line_for_connector("720x480@60",
+							      &connector,
+							      &mode));
+	FAIL_ON(!mode.specified);
+	FAIL_ON(mode.xres != 720);
+	FAIL_ON(mode.yres != 480);
+
+	FAIL_ON(!mode.refresh_specified);
+	FAIL_ON(mode.refresh != 60);
+
+	FAIL_ON(mode.bpp_specified);
+
+	FAIL_ON(mode.rb);
+	FAIL_ON(mode.cvt);
+	FAIL_ON(mode.interlace);
+	FAIL_ON(mode.margins);
+	FAIL_ON(mode.force != DRM_FORCE_UNSPECIFIED);
+
+	return 0;
+}
+
+static int drm_cmdline_test_res_bpp_refresh(void *ignored)
+{
+	struct drm_connector connector = { 0 };
+	struct drm_cmdline_mode mode = { 0 };
+
+	FAIL_ON(!drm_mode_parse_command_line_for_connector("720x480-24@60",
+							      &connector,
+							      &mode));
+	FAIL_ON(!mode.specified);
+	FAIL_ON(mode.xres != 720);
+	FAIL_ON(mode.yres != 480);
+
+	FAIL_ON(!mode.refresh_specified);
+	FAIL_ON(mode.refresh != 60);
+
+	FAIL_ON(!mode.bpp_specified);
+	FAIL_ON(mode.bpp != 24);
+
+	FAIL_ON(mode.rb);
+	FAIL_ON(mode.cvt);
+	FAIL_ON(mode.interlace);
+	FAIL_ON(mode.margins);
+	FAIL_ON(mode.force != DRM_FORCE_UNSPECIFIED);
+
+	return 0;
+}
+
+static int drm_cmdline_test_res_bpp_refresh_interlaced(void *ignored)
+{
+	struct drm_connector connector = { 0 };
+	struct drm_cmdline_mode mode = { 0 };
+
+	FAIL_ON(!drm_mode_parse_command_line_for_connector("720x480-24@60i",
+							      &connector,
+							      &mode));
+	FAIL_ON(!mode.specified);
+	FAIL_ON(mode.xres != 720);
+	FAIL_ON(mode.yres != 480);
+
+	FAIL_ON(!mode.refresh_specified);
+	FAIL_ON(mode.refresh != 60);
+
+	FAIL_ON(!mode.bpp_specified);
+	FAIL_ON(mode.bpp != 24);
+
+	FAIL_ON(mode.rb);
+	FAIL_ON(mode.cvt);
+	FAIL_ON(!mode.interlace);
+	FAIL_ON(mode.margins);
+	FAIL_ON(mode.force != DRM_FORCE_UNSPECIFIED);
+
+	return 0;
+}
+
+static int drm_cmdline_test_res_bpp_refresh_margins(void *ignored)
+{
+	struct drm_connector connector = { 0 };
+	struct drm_cmdline_mode mode = { 0 };
+
+	FAIL_ON(!drm_mode_parse_command_line_for_connector("720x480-24@60m",
+							      &connector,
+							      &mode));
+	FAIL_ON(!mode.specified);
+	FAIL_ON(mode.xres != 720);
+	FAIL_ON(mode.yres != 480);
+
+	FAIL_ON(!mode.refresh_specified);
+	FAIL_ON(mode.refresh != 60);
+
+	FAIL_ON(!mode.bpp_specified);
+	FAIL_ON(mode.bpp != 24);
+
+	FAIL_ON(mode.rb);
+	FAIL_ON(mode.cvt);
+	FAIL_ON(mode.interlace);
+	FAIL_ON(!mode.margins);
+	FAIL_ON(mode.force != DRM_FORCE_UNSPECIFIED);
+
+	return 0;
+}
+
+static int drm_cmdline_test_res_bpp_refresh_force_off(void *ignored)
+{
+	struct drm_connector connector = { 0 };
+	struct drm_cmdline_mode mode = { 0 };
+
+	FAIL_ON(!drm_mode_parse_command_line_for_connector("720x480-24@60d",
+							      &connector,
+							      &mode));
+	FAIL_ON(!mode.specified);
+	FAIL_ON(mode.xres != 720);
+	FAIL_ON(mode.yres != 480);
+
+	FAIL_ON(!mode.refresh_specified);
+	FAIL_ON(mode.refresh != 60);
+
+	FAIL_ON(!mode.bpp_specified);
+	FAIL_ON(mode.bpp != 24);
+
+	FAIL_ON(mode.rb);
+	FAIL_ON(mode.cvt);
+	FAIL_ON(mode.interlace);
+	FAIL_ON(mode.margins);
+	FAIL_ON(mode.force != DRM_FORCE_OFF);
+
+	return 0;
+}
+
+static int drm_cmdline_test_res_bpp_refresh_force_on_off(void *ignored)
+{
+	struct drm_connector connector = { 0 };
+	struct drm_cmdline_mode mode = { 0 };
+
+	FAIL_ON(drm_mode_parse_command_line_for_connector("720x480-24@60de",
+							       &connector,
+							       &mode));
+
+	return 0;
+}
+
+static int drm_cmdline_test_res_bpp_refresh_force_on(void *ignored)
+{
+	struct drm_connector connector = { 0 };
+	struct drm_cmdline_mode mode = { 0 };
+
+	FAIL_ON(!drm_mode_parse_command_line_for_connector("720x480-24@60e",
+							      &connector,
+							      &mode));
+	FAIL_ON(!mode.specified);
+	FAIL_ON(mode.xres != 720);
+	FAIL_ON(mode.yres != 480);
+
+	FAIL_ON(!mode.refresh_specified);
+	FAIL_ON(mode.refresh != 60);
+
+	FAIL_ON(!mode.bpp_specified);
+	FAIL_ON(mode.bpp != 24);
+
+	FAIL_ON(mode.rb);
+	FAIL_ON(mode.cvt);
+	FAIL_ON(mode.interlace);
+	FAIL_ON(mode.margins);
+	FAIL_ON(mode.force != DRM_FORCE_ON);
+
+	return 0;
+}
+
+static int drm_cmdline_test_res_bpp_refresh_force_on_analog(void *ignored)
+{
+	struct drm_connector connector = { 0 };
+	struct drm_cmdline_mode mode = { 0 };
+
+	FAIL_ON(!drm_mode_parse_command_line_for_connector("720x480-24@60D",
+							      &connector,
+							      &mode));
+	FAIL_ON(!mode.specified);
+	FAIL_ON(mode.xres != 720);
+	FAIL_ON(mode.yres != 480);
+
+	FAIL_ON(!mode.refresh_specified);
+	FAIL_ON(mode.refresh != 60);
+
+	FAIL_ON(!mode.bpp_specified);
+	FAIL_ON(mode.bpp != 24);
+
+	FAIL_ON(mode.rb);
+	FAIL_ON(mode.cvt);
+	FAIL_ON(mode.interlace);
+	FAIL_ON(mode.margins);
+	FAIL_ON(mode.force != DRM_FORCE_ON);
+
+	return 0;
+}
+
+static int drm_cmdline_test_res_bpp_refresh_force_on_digital(void *ignored)
+{
+	struct drm_connector connector = { 0 };
+	struct drm_cmdline_mode mode = { 0 };
+
+	connector.connector_type = DRM_MODE_CONNECTOR_DVII;
+	FAIL_ON(!drm_mode_parse_command_line_for_connector("720x480-24@60D",
+							      &connector,
+							      &mode));
+	FAIL_ON(!mode.specified);
+	FAIL_ON(mode.xres != 720);
+	FAIL_ON(mode.yres != 480);
+
+	FAIL_ON(!mode.refresh_specified);
+	FAIL_ON(mode.refresh != 60);
+
+	FAIL_ON(!mode.bpp_specified);
+	FAIL_ON(mode.bpp != 24);
+
+	FAIL_ON(mode.rb);
+	FAIL_ON(mode.cvt);
+	FAIL_ON(mode.interlace);
+	FAIL_ON(mode.margins);
+	FAIL_ON(mode.force != DRM_FORCE_ON_DIGITAL);
+
+	return 0;
+}
+
+static int drm_cmdline_test_res_bpp_refresh_interlaced_margins_force_on(void *ignored)
+{
+	struct drm_connector connector = { 0 };
+	struct drm_cmdline_mode mode = { 0 };
+
+	FAIL_ON(!drm_mode_parse_command_line_for_connector("720x480-24@60ime",
+							      &connector,
+							      &mode));
+	FAIL_ON(!mode.specified);
+	FAIL_ON(mode.xres != 720);
+	FAIL_ON(mode.yres != 480);
+
+	FAIL_ON(!mode.refresh_specified);
+	FAIL_ON(mode.refresh != 60);
+
+	FAIL_ON(!mode.bpp_specified);
+	FAIL_ON(mode.bpp != 24);
+
+	FAIL_ON(mode.rb);
+	FAIL_ON(mode.cvt);
+	FAIL_ON(!mode.interlace);
+	FAIL_ON(!mode.margins);
+	FAIL_ON(mode.force != DRM_FORCE_ON);
+
+	return 0;
+}
+
+static int drm_cmdline_test_res_margins_force_on(void *ignored)
+{
+	struct drm_connector connector = { 0 };
+	struct drm_cmdline_mode mode = { 0 };
+
+	FAIL_ON(!drm_mode_parse_command_line_for_connector("720x480me",
+							      &connector,
+							      &mode));
+	FAIL_ON(!mode.specified);
+	FAIL_ON(mode.xres != 720);
+	FAIL_ON(mode.yres != 480);
+
+	FAIL_ON(mode.refresh_specified);
+
+	FAIL_ON(mode.bpp_specified);
+
+	FAIL_ON(mode.rb);
+	FAIL_ON(mode.cvt);
+	FAIL_ON(mode.interlace);
+	FAIL_ON(!mode.margins);
+	FAIL_ON(mode.force != DRM_FORCE_ON);
+
+	return 0;
+}
+
+static int drm_cmdline_test_res_vesa_margins(void *ignored)
+{
+	struct drm_connector connector = { 0 };
+	struct drm_cmdline_mode mode = { 0 };
+
+	FAIL_ON(!drm_mode_parse_command_line_for_connector("720x480Mm",
+							      &connector,
+							      &mode));
+	FAIL_ON(!mode.specified);
+	FAIL_ON(mode.xres != 720);
+	FAIL_ON(mode.yres != 480);
+
+	FAIL_ON(mode.refresh_specified);
+
+	FAIL_ON(mode.bpp_specified);
+
+	FAIL_ON(mode.rb);
+	FAIL_ON(!mode.cvt);
+	FAIL_ON(mode.interlace);
+	FAIL_ON(!mode.margins);
+	FAIL_ON(mode.force != DRM_FORCE_UNSPECIFIED);
+
+	return 0;
+}
+
+static int drm_cmdline_test_res_invalid_mode(void *ignored)
+{
+	struct drm_connector connector = { 0 };
+	struct drm_cmdline_mode mode = { 0 };
+
+	FAIL_ON(drm_mode_parse_command_line_for_connector("720x480f",
+							      &connector,
+							      &mode));
+
+	return 0;
+}
+
+static int drm_cmdline_test_res_bpp_wrong_place_mode(void *ignored)
+{
+	struct drm_connector connector = { 0 };
+	struct drm_cmdline_mode mode = { 0 };
+
+	FAIL_ON(drm_mode_parse_command_line_for_connector("720x480e-24",
+							       &connector,
+							       &mode));
+
+	return 0;
+}
+
+static int drm_cmdline_test_name(void *ignored)
+{
+	struct drm_connector connector = { 0 };
+	struct drm_cmdline_mode mode = { 0 };
+
+	FAIL_ON(!drm_mode_parse_command_line_for_connector("NTSC",
+							      &connector,
+							      &mode));
+	FAIL_ON(strcmp(mode.name, "NTSC"));
+	FAIL_ON(mode.refresh_specified);
+	FAIL_ON(mode.bpp_specified);
+
+	return 0;
+}
+
+static int drm_cmdline_test_name_bpp(void *ignored)
+{
+	struct drm_connector connector = { 0 };
+	struct drm_cmdline_mode mode = { 0 };
+
+	FAIL_ON(!drm_mode_parse_command_line_for_connector("NTSC-24",
+							      &connector,
+							      &mode));
+	FAIL_ON(strcmp(mode.name, "NTSC"));
+
+	FAIL_ON(mode.refresh_specified);
+
+	FAIL_ON(!mode.bpp_specified);
+	FAIL_ON(mode.bpp != 24);
+
+	return 0;
+}
+
+static int drm_cmdline_test_name_bpp_refresh(void *ignored)
+{
+	struct drm_connector connector = { 0 };
+	struct drm_cmdline_mode mode = { 0 };
+
+	FAIL_ON(drm_mode_parse_command_line_for_connector("NTSC-24@60",
+							       &connector,
+							       &mode));
+
+	return 0;
+}
+
+static int drm_cmdline_test_name_refresh(void *ignored)
+{
+	struct drm_connector connector = { 0 };
+	struct drm_cmdline_mode mode = { 0 };
+
+	FAIL_ON(drm_mode_parse_command_line_for_connector("NTSC@60",
+							       &connector,
+							       &mode));
+
+	return 0;
+}
+
+static int drm_cmdline_test_name_refresh_wrong_mode(void *ignored)
+{
+	struct drm_connector connector = { 0 };
+	struct drm_cmdline_mode mode = { 0 };
+
+	FAIL_ON(drm_mode_parse_command_line_for_connector("NTSC@60m",
+							       &connector,
+							       &mode));
+
+	return 0;
+}
+
+static int drm_cmdline_test_name_refresh_invalid_mode(void *ignored)
+{
+	struct drm_connector connector = { 0 };
+	struct drm_cmdline_mode mode = { 0 };
+
+	FAIL_ON(drm_mode_parse_command_line_for_connector("NTSC@60f",
+							       &connector,
+							       &mode));
+
+	return 0;
+}
+
+static int drm_cmdline_test_name_option(void *ignored)
+{
+	struct drm_connector connector = { 0 };
+	struct drm_cmdline_mode mode = { 0 };
+
+	FAIL_ON(!drm_mode_parse_command_line_for_connector("NTSC,rotate=180",
+							      &connector,
+							      &mode));
+	FAIL_ON(!mode.specified);
+	FAIL_ON(strcmp(mode.name, "NTSC"));
+	FAIL_ON(mode.rotation != DRM_MODE_ROTATE_180);
+
+	return 0;
+}
+
+static int drm_cmdline_test_name_bpp_option(void *ignored)
+{
+	struct drm_connector connector = { 0 };
+	struct drm_cmdline_mode mode = { 0 };
+
+	FAIL_ON(!drm_mode_parse_command_line_for_connector("NTSC-24,rotate=180",
+							      &connector,
+							      &mode));
+	FAIL_ON(!mode.specified);
+	FAIL_ON(strcmp(mode.name, "NTSC"));
+	FAIL_ON(mode.rotation != DRM_MODE_ROTATE_180);
+	FAIL_ON(!mode.bpp_specified);
+	FAIL_ON(mode.bpp != 24);
+
+	return 0;
+}
+
+static int drm_cmdline_test_rotate_0(void *ignored)
+{
+	struct drm_connector connector = { 0 };
+	struct drm_cmdline_mode mode = { 0 };
+
+	FAIL_ON(!drm_mode_parse_command_line_for_connector("720x480,rotate=0",
+							      &connector,
+							      &mode));
+	FAIL_ON(!mode.specified);
+	FAIL_ON(mode.xres != 720);
+	FAIL_ON(mode.yres != 480);
+	FAIL_ON(mode.rotation != DRM_MODE_ROTATE_0);
+
+	FAIL_ON(mode.refresh_specified);
+
+	FAIL_ON(mode.bpp_specified);
+
+	FAIL_ON(mode.rb);
+	FAIL_ON(mode.cvt);
+	FAIL_ON(mode.interlace);
+	FAIL_ON(mode.margins);
+	FAIL_ON(mode.force != DRM_FORCE_UNSPECIFIED);
+
+	return 0;
+}
+
+static int drm_cmdline_test_rotate_90(void *ignored)
+{
+	struct drm_connector connector = { 0 };
+	struct drm_cmdline_mode mode = { 0 };
+
+	FAIL_ON(!drm_mode_parse_command_line_for_connector("720x480,rotate=90",
+							      &connector,
+							      &mode));
+	FAIL_ON(!mode.specified);
+	FAIL_ON(mode.xres != 720);
+	FAIL_ON(mode.yres != 480);
+	FAIL_ON(mode.rotation != DRM_MODE_ROTATE_90);
+
+	FAIL_ON(mode.refresh_specified);
+
+	FAIL_ON(mode.bpp_specified);
+
+	FAIL_ON(mode.rb);
+	FAIL_ON(mode.cvt);
+	FAIL_ON(mode.interlace);
+	FAIL_ON(mode.margins);
+	FAIL_ON(mode.force != DRM_FORCE_UNSPECIFIED);
+
+	return 0;
+}
+
+static int drm_cmdline_test_rotate_180(void *ignored)
+{
+	struct drm_connector connector = { 0 };
+	struct drm_cmdline_mode mode = { 0 };
+
+	FAIL_ON(!drm_mode_parse_command_line_for_connector("720x480,rotate=180",
+							      &connector,
+							      &mode));
+	FAIL_ON(!mode.specified);
+	FAIL_ON(mode.xres != 720);
+	FAIL_ON(mode.yres != 480);
+	FAIL_ON(mode.rotation != DRM_MODE_ROTATE_180);
+
+	FAIL_ON(mode.refresh_specified);
+
+	FAIL_ON(mode.bpp_specified);
+
+	FAIL_ON(mode.rb);
+	FAIL_ON(mode.cvt);
+	FAIL_ON(mode.interlace);
+	FAIL_ON(mode.margins);
+	FAIL_ON(mode.force != DRM_FORCE_UNSPECIFIED);
+
+	return 0;
+}
+
+static int drm_cmdline_test_rotate_270(void *ignored)
+{
+	struct drm_connector connector = { 0 };
+	struct drm_cmdline_mode mode = { 0 };
+
+	FAIL_ON(!drm_mode_parse_command_line_for_connector("720x480,rotate=270",
+							      &connector,
+							      &mode));
+	FAIL_ON(!mode.specified);
+	FAIL_ON(mode.xres != 720);
+	FAIL_ON(mode.yres != 480);
+	FAIL_ON(mode.rotation != DRM_MODE_ROTATE_270);
+
+	FAIL_ON(mode.refresh_specified);
+
+	FAIL_ON(mode.bpp_specified);
+
+	FAIL_ON(mode.rb);
+	FAIL_ON(mode.cvt);
+	FAIL_ON(mode.interlace);
+	FAIL_ON(mode.margins);
+	FAIL_ON(mode.force != DRM_FORCE_UNSPECIFIED);
+
+	return 0;
+}
+
+static int drm_cmdline_test_rotate_invalid_val(void *ignored)
+{
+	struct drm_connector connector = { 0 };
+	struct drm_cmdline_mode mode = { 0 };
+
+	FAIL_ON(drm_mode_parse_command_line_for_connector("720x480,rotate=42",
+							       &connector,
+							       &mode));
+
+	return 0;
+}
+
+static int drm_cmdline_test_rotate_truncated(void *ignored)
+{
+	struct drm_connector connector = { 0 };
+	struct drm_cmdline_mode mode = { 0 };
+
+	FAIL_ON(drm_mode_parse_command_line_for_connector("720x480,rotate=",
+							       &connector,
+							       &mode));
+
+	return 0;
+}
+
+static int drm_cmdline_test_hmirror(void *ignored)
+{
+	struct drm_connector connector = { 0 };
+	struct drm_cmdline_mode mode = { 0 };
+
+	FAIL_ON(!drm_mode_parse_command_line_for_connector("720x480,reflect_x",
+							      &connector,
+							      &mode));
+	FAIL_ON(!mode.specified);
+	FAIL_ON(mode.xres != 720);
+	FAIL_ON(mode.yres != 480);
+	FAIL_ON(mode.rotation != DRM_MODE_REFLECT_X);
+
+	FAIL_ON(mode.refresh_specified);
+
+	FAIL_ON(mode.bpp_specified);
+
+	FAIL_ON(mode.rb);
+	FAIL_ON(mode.cvt);
+	FAIL_ON(mode.interlace);
+	FAIL_ON(mode.margins);
+	FAIL_ON(mode.force != DRM_FORCE_UNSPECIFIED);
+
+	return 0;
+}
+
+static int drm_cmdline_test_vmirror(void *ignored)
+{
+	struct drm_connector connector = { 0 };
+	struct drm_cmdline_mode mode = { 0 };
+
+	FAIL_ON(!drm_mode_parse_command_line_for_connector("720x480,reflect_y",
+							      &connector,
+							      &mode));
+	FAIL_ON(!mode.specified);
+	FAIL_ON(mode.xres != 720);
+	FAIL_ON(mode.yres != 480);
+	FAIL_ON(mode.rotation != DRM_MODE_REFLECT_Y);
+
+	FAIL_ON(mode.refresh_specified);
+
+	FAIL_ON(mode.bpp_specified);
+
+	FAIL_ON(mode.rb);
+	FAIL_ON(mode.cvt);
+	FAIL_ON(mode.interlace);
+	FAIL_ON(mode.margins);
+	FAIL_ON(mode.force != DRM_FORCE_UNSPECIFIED);
+
+	return 0;
+}
+
+static int drm_cmdline_test_overscan_options(void *ignored)
+{
+	struct drm_connector connector = { 0 };
+	struct drm_cmdline_mode mode = { 0 };
+
+	FAIL_ON(!drm_mode_parse_command_line_for_connector("720x480,overscan_right=14,overscan_left=24,overscan_bottom=36,overscan_top=42",
+							      &connector,
+							      &mode));
+	FAIL_ON(!mode.specified);
+	FAIL_ON(mode.xres != 720);
+	FAIL_ON(mode.yres != 480);
+	FAIL_ON(mode.overscan_right != 14);
+	FAIL_ON(mode.overscan_left != 24);
+	FAIL_ON(mode.overscan_bottom != 36);
+	FAIL_ON(mode.overscan_top != 42);
+
+	FAIL_ON(mode.refresh_specified);
+
+	FAIL_ON(mode.bpp_specified);
+
+	FAIL_ON(mode.rb);
+	FAIL_ON(mode.cvt);
+	FAIL_ON(mode.interlace);
+	FAIL_ON(mode.margins);
+	FAIL_ON(mode.force != DRM_FORCE_UNSPECIFIED);
+
+	return 0;
+}
+
+static int drm_cmdline_test_multiple_options(void *ignored)
+{
+	struct drm_connector connector = { 0 };
+	struct drm_cmdline_mode mode = { 0 };
+
+	FAIL_ON(!drm_mode_parse_command_line_for_connector("720x480,rotate=270,reflect_x",
+							      &connector,
+							      &mode));
+	FAIL_ON(!mode.specified);
+	FAIL_ON(mode.xres != 720);
+	FAIL_ON(mode.yres != 480);
+	FAIL_ON(mode.rotation != (DRM_MODE_ROTATE_270 | DRM_MODE_REFLECT_X));
+
+	FAIL_ON(mode.refresh_specified);
+
+	FAIL_ON(mode.bpp_specified);
+
+	FAIL_ON(mode.rb);
+	FAIL_ON(mode.cvt);
+	FAIL_ON(mode.interlace);
+	FAIL_ON(mode.margins);
+	FAIL_ON(mode.force != DRM_FORCE_UNSPECIFIED);
+
+	return 0;
+}
+
+static int drm_cmdline_test_invalid_option(void *ignored)
+{
+	struct drm_connector connector = { 0 };
+	struct drm_cmdline_mode mode = { 0 };
+
+	FAIL_ON(drm_mode_parse_command_line_for_connector("720x480,test=42",
+							       &connector,
+							       &mode));
+
+	return 0;
+}
+
+#include "drm_selftest.c"
+
+static int __init test_drm_cmdline_init(void)
+{
+	int err;
+
+	err = run_selftests(selftests, ARRAY_SIZE(selftests), NULL);
+
+	return err > 0 ? 0 : err;
+}
+module_init(test_drm_cmdline_init);
