drm/selftests: modes: Add more unit tests for the cmdline parser

Let's add some unit tests for the recent bugs we just fixed.

Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Tested-by: Thomas Graichen <thomas.graichen@gmail.com>
Reviewed-by: Jernej Skrabec <jernej.skrabec@siol.net>
Signed-off-by: Maxime Ripard <mripard@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20190827115850.25731-4-mripard@kernel.org

drivers/gpu/drm/selftests/drm_cmdline_selftests.h

@@ -9,6 +9,13 @@
 
 #define cmdline_test(test)	selftest(test, test)
 
+cmdline_test(drm_cmdline_test_force_d_only)
+cmdline_test(drm_cmdline_test_force_D_only_dvi)
+cmdline_test(drm_cmdline_test_force_D_only_hdmi)
+cmdline_test(drm_cmdline_test_force_D_only_not_digital)
+cmdline_test(drm_cmdline_test_force_e_only)
+cmdline_test(drm_cmdline_test_margin_only)
+cmdline_test(drm_cmdline_test_interlace_only)
 cmdline_test(drm_cmdline_test_res)
 cmdline_test(drm_cmdline_test_res_missing_x)
 cmdline_test(drm_cmdline_test_res_missing_y)

drivers/gpu/drm/selftests/test-drm_cmdline_parser.c

@@ -17,6 +17,136 @@
 
 static const struct drm_connector no_connector = {};
 
+static int drm_cmdline_test_force_e_only(void *ignored)
+{
+	struct drm_cmdline_mode mode = { };
+
+	FAIL_ON(!drm_mode_parse_command_line_for_connector("e",
+							   &no_connector,
+							   &mode));
+	FAIL_ON(mode.specified);
+	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_force_D_only_not_digital(void *ignored)
+{
+	struct drm_cmdline_mode mode = { };
+
+	FAIL_ON(!drm_mode_parse_command_line_for_connector("D",
+							   &no_connector,
+							   &mode));
+	FAIL_ON(mode.specified);
+	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 const struct drm_connector connector_hdmi = {
+	.connector_type	= DRM_MODE_CONNECTOR_HDMIB,
+};
+
+static int drm_cmdline_test_force_D_only_hdmi(void *ignored)
+{
+	struct drm_cmdline_mode mode = { };
+
+	FAIL_ON(!drm_mode_parse_command_line_for_connector("D",
+							   &connector_hdmi,
+							   &mode));
+	FAIL_ON(mode.specified);
+	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_DIGITAL);
+
+	return 0;
+}
+
+static const struct drm_connector connector_dvi = {
+	.connector_type	= DRM_MODE_CONNECTOR_DVII,
+};
+
+static int drm_cmdline_test_force_D_only_dvi(void *ignored)
+{
+	struct drm_cmdline_mode mode = { };
+
+	FAIL_ON(!drm_mode_parse_command_line_for_connector("D",
+							   &connector_dvi,
+							   &mode));
+	FAIL_ON(mode.specified);
+	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_DIGITAL);
+
+	return 0;
+}
+
+static int drm_cmdline_test_force_d_only(void *ignored)
+{
+	struct drm_cmdline_mode mode = { };
+
+	FAIL_ON(!drm_mode_parse_command_line_for_connector("d",
+							   &no_connector,
+							   &mode));
+	FAIL_ON(mode.specified);
+	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_OFF);
+
+	return 0;
+}
+
+static int drm_cmdline_test_margin_only(void *ignored)
+{
+	struct drm_cmdline_mode mode = { };
+
+	FAIL_ON(drm_mode_parse_command_line_for_connector("m",
+							  &no_connector,
+							  &mode));
+
+	return 0;
+}
+
+static int drm_cmdline_test_interlace_only(void *ignored)
+{
+	struct drm_cmdline_mode mode = { };
+
+	FAIL_ON(drm_mode_parse_command_line_for_connector("i",
+							  &no_connector,
+							  &mode));
+
+	return 0;
+}
+
 static int drm_cmdline_test_res(void *ignored)
 {
 	struct drm_cmdline_mode mode = { };