[PATCH v2 19/41] drm/modes: Introduce the tv_mode property as a command-line option

[Maxime Ripard <maxime@cerno.tech>]

Our new tv mode option allows to specify the TV mode from a property.
However, it can still be useful, for example to avoid any boot time
artifact, to set that property directly from the kernel command line.

Let's add some code to allow it, and some unit tests to exercise that code.

Signed-off-by: Maxime Ripard <maxime@cerno.tech>

diff --git a/drivers/gpu/drm/drm_modes.c b/drivers/gpu/drm/drm_modes.c
index 73d01e755496..a759a4ba0036 100644
--- a/drivers/gpu/drm/drm_modes.c
+++ b/drivers/gpu/drm/drm_modes.c
@@ -2115,6 +2115,30 @@ static int drm_mode_parse_panel_orientation(const char *delim,
 	return 0;
 }
 
+static int drm_mode_parse_tv_mode(const char *delim,
+				  struct drm_cmdline_mode *mode)
+{
+	const char *value;
+	unsigned int len;
+	int ret;
+
+	if (*delim != '=')
+		return -EINVAL;
+
+	value = delim + 1;
+	delim = strchr(value, ',');
+	if (!delim)
+		delim = value + strlen(value);
+
+	ret = drm_get_tv_mode_from_name(value, delim - value);
+	if (ret < 0)
+		return ret;
+
+	mode->tv_mode = ret;
+
+	return 0;
+}
+
 static int drm_mode_parse_cmdline_options(const char *str,
 					  bool freestanding,
 					  const struct drm_connector *connector,
@@ -2184,6 +2208,9 @@ static int drm_mode_parse_cmdline_options(const char *str,
 		} else if (!strncmp(option, "panel_orientation", delim - option)) {
 			if (drm_mode_parse_panel_orientation(delim, mode))
 				return -EINVAL;
+		} else if (!strncmp(option, "tv_mode", delim - option)) {
+			if (drm_mode_parse_tv_mode(delim, mode))
+				return -EINVAL;
 		} else {
 			return -EINVAL;
 		}
@@ -2212,20 +2239,22 @@ struct drm_named_mode {
 	unsigned int xres;
 	unsigned int yres;
 	unsigned int flags;
+	unsigned int tv_mode;
 };
 
-#define NAMED_MODE(_name, _pclk, _x, _y, _flags)	\
+#define NAMED_MODE(_name, _pclk, _x, _y, _flags, _mode)	\
 	{						\
 		.name = _name,				\
 		.pixel_clock_khz = _pclk,		\
 		.xres = _x,				\
 		.yres = _y,				\
 		.flags = _flags,			\
+		.tv_mode = _mode,			\
 	}
 
 static const struct drm_named_mode drm_named_modes[] = {
-	NAMED_MODE("NTSC", 13500, 720, 480, DRM_MODE_FLAG_INTERLACE),
-	NAMED_MODE("PAL", 13500, 720, 576, DRM_MODE_FLAG_INTERLACE),
+	NAMED_MODE("NTSC", 13500, 720, 480, DRM_MODE_FLAG_INTERLACE, DRM_MODE_TV_MODE_NTSC_M),
+	NAMED_MODE("PAL", 13500, 720, 576, DRM_MODE_FLAG_INTERLACE, DRM_MODE_TV_MODE_PAL_B),
 };
 
 static int drm_mode_parse_cmdline_named_mode(const char *name,
@@ -2271,6 +2300,7 @@ static int drm_mode_parse_cmdline_named_mode(const char *name,
 		cmdline_mode->xres = mode->xres;
 		cmdline_mode->yres = mode->yres;
 		cmdline_mode->interlace = !!(mode->flags & DRM_MODE_FLAG_INTERLACE);
+		cmdline_mode->tv_mode = mode->tv_mode;
 		cmdline_mode->specified = true;
 
 		return 1;
diff --git a/drivers/gpu/drm/tests/drm_cmdline_parser_test.c b/drivers/gpu/drm/tests/drm_cmdline_parser_test.c
index 59b29cdfdd35..f1e73ed65be0 100644
--- a/drivers/gpu/drm/tests/drm_cmdline_parser_test.c
+++ b/drivers/gpu/drm/tests/drm_cmdline_parser_test.c
@@ -885,6 +885,201 @@ static void drm_cmdline_test_multiple_options(struct kunit *test)
 	KUNIT_EXPECT_EQ(test, mode.force, DRM_FORCE_UNSPECIFIED);
 }
 
+static void drm_cmdline_test_tv_options(struct kunit *test,
+					const char *cmdline,
+					const struct drm_display_mode *expected_mode,
+					unsigned int expected_tv_mode)
+{
+	struct drm_cmdline_mode mode = { };
+
+	KUNIT_EXPECT_TRUE(test, drm_mode_parse_command_line_for_connector(cmdline,
+									  &no_connector, &mode));
+	KUNIT_EXPECT_TRUE(test, mode.specified);
+	KUNIT_EXPECT_EQ(test, mode.xres, expected_mode->hdisplay);
+	KUNIT_EXPECT_EQ(test, mode.yres, expected_mode->vdisplay);
+	KUNIT_EXPECT_EQ(test, mode.tv_mode, expected_tv_mode);
+
+	KUNIT_EXPECT_FALSE(test, mode.refresh_specified);
+
+	KUNIT_EXPECT_FALSE(test, mode.bpp_specified);
+
+	KUNIT_EXPECT_FALSE(test, mode.rb);
+	KUNIT_EXPECT_FALSE(test, mode.cvt);
+	KUNIT_EXPECT_EQ(test, mode.interlace, !!(expected_mode->flags & DRM_MODE_FLAG_INTERLACE));
+	KUNIT_EXPECT_FALSE(test, mode.margins);
+	KUNIT_EXPECT_EQ(test, mode.force, DRM_FORCE_UNSPECIFIED);
+}
+
+static void drm_cmdline_test_tv_option_ntsc_443(struct kunit *test)
+{
+	drm_cmdline_test_tv_options(test,
+				    "720x480i,tv_mode=NTSC-443",
+				    drm_mode_analog_ntsc_480i(NULL),
+				    DRM_MODE_TV_MODE_NTSC_443);
+}
+
+static void drm_cmdline_test_tv_option_ntsc_j(struct kunit *test)
+{
+	drm_cmdline_test_tv_options(test,
+				    "720x480i,tv_mode=NTSC-J",
+				    drm_mode_analog_ntsc_480i(NULL),
+				    DRM_MODE_TV_MODE_NTSC_J);
+}
+
+static void drm_cmdline_test_tv_option_ntsc_m(struct kunit *test)
+{
+	drm_cmdline_test_tv_options(test,
+				    "720x480i,tv_mode=NTSC-M",
+				    drm_mode_analog_ntsc_480i(NULL),
+				    DRM_MODE_TV_MODE_NTSC_M);
+}
+
+static void drm_cmdline_test_tv_option_pal_60(struct kunit *test)
+{
+	drm_cmdline_test_tv_options(test,
+				    "720x576i,tv_mode=PAL-60",
+				    drm_mode_analog_pal_576i(NULL),
+				    DRM_MODE_TV_MODE_PAL_60);
+}
+
+static void drm_cmdline_test_tv_option_pal_b(struct kunit *test)
+{
+	drm_cmdline_test_tv_options(test,
+				    "720x576i,tv_mode=PAL-B",
+				    drm_mode_analog_pal_576i(NULL),
+				    DRM_MODE_TV_MODE_PAL_B);
+}
+
+static void drm_cmdline_test_tv_option_pal_d(struct kunit *test)
+{
+	drm_cmdline_test_tv_options(test,
+				    "720x576i,tv_mode=PAL-D",
+				    drm_mode_analog_pal_576i(NULL),
+				    DRM_MODE_TV_MODE_PAL_D);
+}
+
+static void drm_cmdline_test_tv_option_pal_g(struct kunit *test)
+{
+	drm_cmdline_test_tv_options(test,
+				    "720x576i,tv_mode=PAL-G",
+				    drm_mode_analog_pal_576i(NULL),
+				    DRM_MODE_TV_MODE_PAL_G);
+}
+
+static void drm_cmdline_test_tv_option_pal_h(struct kunit *test)
+{
+	drm_cmdline_test_tv_options(test,
+				    "720x576i,tv_mode=PAL-H",
+				    drm_mode_analog_pal_576i(NULL),
+				    DRM_MODE_TV_MODE_PAL_H);
+}
+
+static void drm_cmdline_test_tv_option_pal_i(struct kunit *test)
+{
+	drm_cmdline_test_tv_options(test,
+				    "720x576i,tv_mode=PAL-I",
+				    drm_mode_analog_pal_576i(NULL),
+				    DRM_MODE_TV_MODE_PAL_I);
+}
+
+static void drm_cmdline_test_tv_option_pal_m(struct kunit *test)
+{
+	drm_cmdline_test_tv_options(test,
+				    "720x480i,tv_mode=PAL-M",
+				    drm_mode_analog_ntsc_480i(NULL),
+				    DRM_MODE_TV_MODE_PAL_M);
+}
+
+static void drm_cmdline_test_tv_option_pal_n(struct kunit *test)
+{
+	drm_cmdline_test_tv_options(test,
+				    "720x576i,tv_mode=PAL-N",
+				    drm_mode_analog_pal_576i(NULL),
+				    DRM_MODE_TV_MODE_PAL_N);
+}
+
+static void drm_cmdline_test_tv_option_pal_nc(struct kunit *test)
+{
+	drm_cmdline_test_tv_options(test,
+				    "720x576i,tv_mode=PAL-Nc",
+				    drm_mode_analog_pal_576i(NULL),
+				    DRM_MODE_TV_MODE_PAL_NC);
+}
+
+static void drm_cmdline_test_tv_option_secam_60(struct kunit *test)
+{
+	drm_cmdline_test_tv_options(test,
+				    "720x576i,tv_mode=SECAM-60",
+				    drm_mode_analog_pal_576i(NULL),
+				    DRM_MODE_TV_MODE_SECAM_60);
+}
+
+static void drm_cmdline_test_tv_option_secam_b(struct kunit *test)
+{
+	drm_cmdline_test_tv_options(test,
+				    "720x576i,tv_mode=SECAM-B",
+				    drm_mode_analog_pal_576i(NULL),
+				    DRM_MODE_TV_MODE_SECAM_B);
+}
+
+static void drm_cmdline_test_tv_option_secam_d(struct kunit *test)
+{
+	drm_cmdline_test_tv_options(test,
+				    "720x576i,tv_mode=SECAM-D",
+				    drm_mode_analog_pal_576i(NULL),
+				    DRM_MODE_TV_MODE_SECAM_D);
+}
+
+static void drm_cmdline_test_tv_option_secam_g(struct kunit *test)
+{
+	drm_cmdline_test_tv_options(test,
+				    "720x576i,tv_mode=SECAM-G",
+				    drm_mode_analog_pal_576i(NULL),
+				    DRM_MODE_TV_MODE_SECAM_G);
+}
+
+static void drm_cmdline_test_tv_option_secam_k(struct kunit *test)
+{
+	drm_cmdline_test_tv_options(test,
+				    "720x576i,tv_mode=SECAM-K",
+				    drm_mode_analog_pal_576i(NULL),
+				    DRM_MODE_TV_MODE_SECAM_K);
+}
+
+static void drm_cmdline_test_tv_option_secam_k1(struct kunit *test)
+{
+	drm_cmdline_test_tv_options(test,
+				    "720x576i,tv_mode=SECAM-K1",
+				    drm_mode_analog_pal_576i(NULL),
+				    DRM_MODE_TV_MODE_SECAM_K1);
+}
+
+static void drm_cmdline_test_tv_option_secam_l(struct kunit *test)
+{
+	drm_cmdline_test_tv_options(test,
+				    "720x576i,tv_mode=SECAM-L",
+				    drm_mode_analog_pal_576i(NULL),
+				    DRM_MODE_TV_MODE_SECAM_L);
+}
+
+static void drm_cmdline_test_tv_option_invalid(struct kunit *test)
+{
+	struct drm_cmdline_mode mode = { };
+	const char *cmdline = "720x480i,tv_mode=invalid";
+
+	KUNIT_EXPECT_FALSE(test, drm_mode_parse_command_line_for_connector(cmdline,
+									   &no_connector, &mode));
+}
+
+static void drm_cmdline_test_tv_option_truncated(struct kunit *test)
+{
+	struct drm_cmdline_mode mode = { };
+	const char *cmdline = "720x480i,tv_mode=NTSC";
+
+	KUNIT_EXPECT_FALSE(test, drm_mode_parse_command_line_for_connector(cmdline,
+									   &no_connector, &mode));
+}
+
 static void drm_cmdline_test_invalid_option(struct kunit *test)
 {
 	struct drm_cmdline_mode mode = { };
@@ -1047,6 +1242,27 @@ static struct kunit_case drm_cmdline_parser_tests[] = {
 	KUNIT_CASE(drm_cmdline_test_name_refresh_invalid_mode),
 	KUNIT_CASE(drm_cmdline_test_name_option),
 	KUNIT_CASE(drm_cmdline_test_name_bpp_option),
+	KUNIT_CASE(drm_cmdline_test_tv_option_ntsc_443),
+	KUNIT_CASE(drm_cmdline_test_tv_option_ntsc_j),
+	KUNIT_CASE(drm_cmdline_test_tv_option_ntsc_m),
+	KUNIT_CASE(drm_cmdline_test_tv_option_pal_60),
+	KUNIT_CASE(drm_cmdline_test_tv_option_pal_b),
+	KUNIT_CASE(drm_cmdline_test_tv_option_pal_d),
+	KUNIT_CASE(drm_cmdline_test_tv_option_pal_g),
+	KUNIT_CASE(drm_cmdline_test_tv_option_pal_h),
+	KUNIT_CASE(drm_cmdline_test_tv_option_pal_i),
+	KUNIT_CASE(drm_cmdline_test_tv_option_pal_m),
+	KUNIT_CASE(drm_cmdline_test_tv_option_pal_n),
+	KUNIT_CASE(drm_cmdline_test_tv_option_pal_nc),
+	KUNIT_CASE(drm_cmdline_test_tv_option_secam_60),
+	KUNIT_CASE(drm_cmdline_test_tv_option_secam_b),
+	KUNIT_CASE(drm_cmdline_test_tv_option_secam_d),
+	KUNIT_CASE(drm_cmdline_test_tv_option_secam_g),
+	KUNIT_CASE(drm_cmdline_test_tv_option_secam_k),
+	KUNIT_CASE(drm_cmdline_test_tv_option_secam_k1),
+	KUNIT_CASE(drm_cmdline_test_tv_option_secam_l),
+	KUNIT_CASE(drm_cmdline_test_tv_option_invalid),
+	KUNIT_CASE(drm_cmdline_test_tv_option_truncated),
 	KUNIT_CASE(drm_cmdline_test_rotate_0),
 	KUNIT_CASE(drm_cmdline_test_rotate_90),
 	KUNIT_CASE(drm_cmdline_test_rotate_180),
diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
index 49d261977d4e..9589108ba202 100644
--- a/include/drm/drm_connector.h
+++ b/include/drm/drm_connector.h
@@ -1447,6 +1447,11 @@ struct drm_cmdline_mode {
 	 * @tv_margins: TV margins to apply to the mode.
 	 */
 	struct drm_connector_tv_margins tv_margins;
+
+	/**
+	 * @tv_mode: TV mode standard. See DRM_MODE_TV_MODE_*.
+	 */
+	enum drm_connector_tv_mode tv_mode;
 };
 
 /**

-- 
b4 0.10.0-dev-65ba7