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Message-ID: <89ae0eb2-7838-6bb0-65b8-02ec0a6bb564@riseup.net>
Date: Tue, 30 Aug 2022 09:44:03 -0300
From: Maíra Canal <mairacanal@...eup.net>
To: Maxime Ripard <maxime@...no.tech>,
Maxime Ripard <mripard@...nel.org>,
Ben Skeggs <bskeggs@...hat.com>,
David Airlie <airlied@...ux.ie>, Chen-Yu Tsai <wens@...e.org>,
Thomas Zimmermann <tzimmermann@...e.de>,
Jani Nikula <jani.nikula@...ux.intel.com>,
Lyude Paul <lyude@...hat.com>,
Philipp Zabel <p.zabel@...gutronix.de>,
Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
Rodrigo Vivi <rodrigo.vivi@...el.com>,
Tvrtko Ursulin <tvrtko.ursulin@...ux.intel.com>,
Jernej Skrabec <jernej.skrabec@...il.com>,
Samuel Holland <samuel@...lland.org>,
Karol Herbst <kherbst@...hat.com>,
Noralf Trønnes <noralf@...nnes.org>,
Emma Anholt <emma@...olt.net>, Daniel Vetter <daniel@...ll.ch>,
Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>
Cc: Dom Cobley <dom@...pberrypi.com>,
Dave Stevenson <dave.stevenson@...pberrypi.com>,
nouveau@...ts.freedesktop.org, intel-gfx@...ts.freedesktop.org,
linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
linux-sunxi@...ts.linux.dev, Hans de Goede <hdegoede@...hat.com>,
Geert Uytterhoeven <geert@...ux-m68k.org>,
Mateusz Kwiatkowski <kfyatek+publicgit@...il.com>,
Phil Elwell <phil@...pberrypi.com>,
linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v2 19/41] drm/modes: Introduce the tv_mode property as a
command-line option
On 8/29/22 10:11, Maxime Ripard wrote:
> 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@...no.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);
> +}
Instead of creating a function to each drm_cmdline_test_tv_options test,
you can create a parameterized test [1] for this function. This will
help the readability of the tests.
[1] https://docs.kernel.org/dev-tools/kunit/usage.html#parameterized-testing
> +
> +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));
> +}
> +
I guess this tests can be incorporated in the future to the negative
tests from Michał Winiarski [2]. I don't know which one will be merged
first.
[2]
https://lore.kernel.org/dri-devel/20220817211236.252091-1-michal.winiarski@intel.com/
Best Regards,
- Maíra Canal
> 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;
> };
>
> /**
>
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