| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <9e9a8a48-89f2-35d4-b26f-afa7cc44f2f6@tronnes.org>
Date: Mon, 7 Nov 2022 18:49:57 +0100
From: Noralf Trønnes <noralf@...nnes.org>
To: Maxime Ripard <maxime@...no.tech>,
Jani Nikula <jani.nikula@...ux.intel.com>,
Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
Tvrtko Ursulin <tvrtko.ursulin@...ux.intel.com>,
Ben Skeggs <bskeggs@...hat.com>,
Rodrigo Vivi <rodrigo.vivi@...el.com>,
Maxime Ripard <mripard@...nel.org>,
Samuel Holland <samuel@...lland.org>,
Jernej Skrabec <jernej.skrabec@...il.com>,
Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
Emma Anholt <emma@...olt.net>,
Karol Herbst <kherbst@...hat.com>,
Daniel Vetter <daniel@...ll.ch>, Chen-Yu Tsai <wens@...e.org>,
Lyude Paul <lyude@...hat.com>,
Thomas Zimmermann <tzimmermann@...e.de>,
David Airlie <airlied@...ux.ie>
Cc: Phil Elwell <phil@...pberrypi.com>,
Hans de Goede <hdegoede@...hat.com>,
linux-sunxi@...ts.linux.dev, linux-kernel@...r.kernel.org,
Geert Uytterhoeven <geert@...ux-m68k.org>,
Dave Stevenson <dave.stevenson@...pberrypi.com>,
linux-arm-kernel@...ts.infradead.org,
Dom Cobley <dom@...pberrypi.com>,
Mateusz Kwiatkowski <kfyatek+publicgit@...il.com>,
dri-devel@...ts.freedesktop.org, intel-gfx@...ts.freedesktop.org,
nouveau@...ts.freedesktop.org,
Noralf Trønnes <noralf@...nnes.org>
Subject: Re: [PATCH v7 14/23] drm/modes: Properly generate a drm_display_mode
from a named mode
Den 07.11.2022 15.16, skrev Maxime Ripard:
> The framework will get the drm_display_mode from the drm_cmdline_mode it
> got by parsing the video command line argument by calling
> drm_connector_pick_cmdline_mode().
>
> The heavy lifting will then be done by the drm_mode_create_from_cmdline_mode()
> function.
>
> In the case of the named modes though, there's no real code to make that
> translation and we rely on the drivers to guess which actual display mode
> we meant.
>
> Let's modify drm_mode_create_from_cmdline_mode() to properly generate the
> drm_display_mode we mean when passing a named mode.
>
> Signed-off-by: Maxime Ripard <maxime@...no.tech>
>
> ---
> Changes in v7:
> - Use tv_mode_specified in drm_mode_parse_command_line_for_connector
>
> Changes in v6:
> - Fix get_modes to return 0 instead of an error code
> - Rename the tests to follow the DRM test naming convention
>
> Changes in v5:
> - Switched to KUNIT_ASSERT_NOT_NULL
> ---
> drivers/gpu/drm/drm_modes.c | 34 ++++++++++-
> drivers/gpu/drm/tests/drm_client_modeset_test.c | 77 ++++++++++++++++++++++++-
> 2 files changed, 109 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_modes.c b/drivers/gpu/drm/drm_modes.c
> index dc037f7ceb37..49441cabdd9d 100644
> --- a/drivers/gpu/drm/drm_modes.c
> +++ b/drivers/gpu/drm/drm_modes.c
> @@ -2497,6 +2497,36 @@ bool drm_mode_parse_command_line_for_connector(const char *mode_option,
> }
> EXPORT_SYMBOL(drm_mode_parse_command_line_for_connector);
>
> +static struct drm_display_mode *drm_named_mode(struct drm_device *dev,
> + struct drm_cmdline_mode *cmd)
> +{
> + struct drm_display_mode *mode;
> + unsigned int i;
> +
> + for (i = 0; i < ARRAY_SIZE(drm_named_modes); i++) {
> + const struct drm_named_mode *named_mode = &drm_named_modes[i];
> +
> + if (strcmp(cmd->name, named_mode->name))
> + continue;
> +
> + if (!cmd->tv_mode_specified)
> + continue;
Only a named mode will set cmd->name, so is this check necessary?
> +
> + mode = drm_analog_tv_mode(dev,
> + named_mode->tv_mode,
> + named_mode->pixel_clock_khz * 1000,
> + named_mode->xres,
> + named_mode->yres,
> + named_mode->flags & DRM_MODE_FLAG_INTERLACE);
> + if (!mode)
> + return NULL;
> +
> + return mode;
You can just return the result from drm_analog_tv_mode() directly.
With those considered:
Reviewed-by: Noralf Trønnes <noralf@...nnes.org>
> + }
> +
> + return NULL;
> +}
> +
> /**
> * drm_mode_create_from_cmdline_mode - convert a command line modeline into a DRM display mode
> * @dev: DRM device to create the new mode for
> @@ -2514,7 +2544,9 @@ drm_mode_create_from_cmdline_mode(struct drm_device *dev,
> if (cmd->xres == 0 || cmd->yres == 0)
> return NULL;
>
> - if (cmd->cvt)
> + if (strlen(cmd->name))
> + mode = drm_named_mode(dev, cmd);
> + else if (cmd->cvt)
> mode = drm_cvt_mode(dev,
> cmd->xres, cmd->yres,
> cmd->refresh_specified ? cmd->refresh : 60,
> diff --git a/drivers/gpu/drm/tests/drm_client_modeset_test.c b/drivers/gpu/drm/tests/drm_client_modeset_test.c
> index 3aa1acfe75df..fdfe9e20702e 100644
> --- a/drivers/gpu/drm/tests/drm_client_modeset_test.c
> +++ b/drivers/gpu/drm/tests/drm_client_modeset_test.c
> @@ -21,7 +21,26 @@ struct drm_client_modeset_test_priv {
>
> static int drm_client_modeset_connector_get_modes(struct drm_connector *connector)
> {
> - return drm_add_modes_noedid(connector, 1920, 1200);
> + struct drm_display_mode *mode;
> + int count;
> +
> + count = drm_add_modes_noedid(connector, 1920, 1200);
> +
> + mode = drm_mode_analog_ntsc_480i(connector->dev);
> + if (!mode)
> + return count;
> +
> + drm_mode_probed_add(connector, mode);
> + count += 1;
> +
> + mode = drm_mode_analog_pal_576i(connector->dev);
> + if (!mode)
> + return count;
> +
> + drm_mode_probed_add(connector, mode);
> + count += 1;
> +
> + return count;
> }
>
> static const struct drm_connector_helper_funcs drm_client_modeset_connector_helper_funcs = {
> @@ -52,6 +71,9 @@ static int drm_client_modeset_test_init(struct kunit *test)
>
> drm_connector_helper_add(&priv->connector, &drm_client_modeset_connector_helper_funcs);
>
> + priv->connector.interlace_allowed = true;
> + priv->connector.doublescan_allowed = true;
> +
> return 0;
>
> }
> @@ -85,9 +107,62 @@ static void drm_test_pick_cmdline_res_1920_1080_60(struct kunit *test)
> KUNIT_EXPECT_TRUE(test, drm_mode_equal(expected_mode, mode));
> }
>
> +static void drm_test_pick_cmdline_named_ntsc(struct kunit *test)
> +{
> + struct drm_client_modeset_test_priv *priv = test->priv;
> + struct drm_device *drm = priv->drm;
> + struct drm_connector *connector = &priv->connector;
> + struct drm_cmdline_mode *cmdline_mode = &connector->cmdline_mode;
> + struct drm_display_mode *mode;
> + const char *cmdline = "NTSC";
> + int ret;
> +
> + KUNIT_ASSERT_TRUE(test,
> + drm_mode_parse_command_line_for_connector(cmdline,
> + connector,
> + cmdline_mode));
> +
> + mutex_lock(&drm->mode_config.mutex);
> + ret = drm_helper_probe_single_connector_modes(connector, 1920, 1080);
> + mutex_unlock(&drm->mode_config.mutex);
> + KUNIT_ASSERT_GT(test, ret, 0);
> +
> + mode = drm_connector_pick_cmdline_mode(connector);
> + KUNIT_ASSERT_NOT_NULL(test, mode);
> +
> + KUNIT_EXPECT_TRUE(test, drm_mode_equal(drm_mode_analog_ntsc_480i(drm), mode));
> +}
> +
> +static void drm_test_pick_cmdline_named_pal(struct kunit *test)
> +{
> + struct drm_client_modeset_test_priv *priv = test->priv;
> + struct drm_device *drm = priv->drm;
> + struct drm_connector *connector = &priv->connector;
> + struct drm_cmdline_mode *cmdline_mode = &connector->cmdline_mode;
> + struct drm_display_mode *mode;
> + const char *cmdline = "PAL";
> + int ret;
> +
> + KUNIT_ASSERT_TRUE(test,
> + drm_mode_parse_command_line_for_connector(cmdline,
> + connector,
> + cmdline_mode));
> +
> + mutex_lock(&drm->mode_config.mutex);
> + ret = drm_helper_probe_single_connector_modes(connector, 1920, 1080);
> + mutex_unlock(&drm->mode_config.mutex);
> + KUNIT_ASSERT_GT(test, ret, 0);
> +
> + mode = drm_connector_pick_cmdline_mode(connector);
> + KUNIT_ASSERT_NOT_NULL(test, mode);
> +
> + KUNIT_EXPECT_TRUE(test, drm_mode_equal(drm_mode_analog_pal_576i(drm), mode));
> +}
>
> static struct kunit_case drm_test_pick_cmdline_tests[] = {
> KUNIT_CASE(drm_test_pick_cmdline_res_1920_1080_60),
> + KUNIT_CASE(drm_test_pick_cmdline_named_ntsc),
> + KUNIT_CASE(drm_test_pick_cmdline_named_pal),
> {}
> };
>
>
Powered by blists - more mailing lists