diff options
Diffstat (limited to 'drivers/gpu/drm/tests/drm_modes_test.c')
| -rw-r--r-- | drivers/gpu/drm/tests/drm_modes_test.c | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/drivers/gpu/drm/tests/drm_modes_test.c b/drivers/gpu/drm/tests/drm_modes_test.c new file mode 100644 index 000000000000..bc4aa2ce78be --- /dev/null +++ b/drivers/gpu/drm/tests/drm_modes_test.c @@ -0,0 +1,158 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Kunit test for drm_modes functions + */ + +#include <drm/drm_drv.h> +#include <drm/drm_kunit_helpers.h> +#include <drm/drm_modes.h> + +#include <kunit/test.h> + +#include <linux/units.h> + +struct drm_test_modes_priv { + struct drm_device *drm; + struct device *dev; +}; + +static int drm_test_modes_init(struct kunit *test) +{ + struct drm_test_modes_priv *priv; + + priv = kunit_kzalloc(test, sizeof(*priv), GFP_KERNEL); + KUNIT_ASSERT_NOT_NULL(test, priv); + + priv->dev = drm_kunit_helper_alloc_device(test); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, priv->dev); + + priv->drm = __drm_kunit_helper_alloc_drm_device(test, priv->dev, + sizeof(*priv->drm), 0, + DRIVER_MODESET); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, priv->drm); + + test->priv = priv; + + return 0; +} + +static void drm_test_modes_exit(struct kunit *test) +{ + struct drm_test_modes_priv *priv = test->priv; + + drm_kunit_helper_free_device(test, priv->dev); +} + +static void drm_test_modes_analog_tv_ntsc_480i(struct kunit *test) +{ + struct drm_test_modes_priv *priv = test->priv; + struct drm_display_mode *mode; + + mode = drm_analog_tv_mode(priv->drm, + DRM_MODE_TV_MODE_NTSC, + 13500 * HZ_PER_KHZ, 720, 480, + true); + KUNIT_ASSERT_NOT_NULL(test, mode); + + KUNIT_EXPECT_EQ(test, drm_mode_vrefresh(mode), 60); + KUNIT_EXPECT_EQ(test, mode->hdisplay, 720); + + /* BT.601 defines hsync_start at 736 for 480i */ + KUNIT_EXPECT_EQ(test, mode->hsync_start, 736); + + /* + * The NTSC standard expects a line to take 63.556us. With a + * pixel clock of 13.5 MHz, a pixel takes around 74ns, so we + * need to have 63556ns / 74ns = 858. + * + * This is also mandated by BT.601. + */ + KUNIT_EXPECT_EQ(test, mode->htotal, 858); + + KUNIT_EXPECT_EQ(test, mode->vdisplay, 480); + KUNIT_EXPECT_EQ(test, mode->vtotal, 525); +} + +static void drm_test_modes_analog_tv_ntsc_480i_inlined(struct kunit *test) +{ + struct drm_test_modes_priv *priv = test->priv; + struct drm_display_mode *expected, *mode; + + expected = drm_analog_tv_mode(priv->drm, + DRM_MODE_TV_MODE_NTSC, + 13500 * HZ_PER_KHZ, 720, 480, + true); + KUNIT_ASSERT_NOT_NULL(test, expected); + + mode = drm_mode_analog_ntsc_480i(priv->drm); + KUNIT_ASSERT_NOT_NULL(test, mode); + + KUNIT_EXPECT_TRUE(test, drm_mode_equal(expected, mode)); +} + +static void drm_test_modes_analog_tv_pal_576i(struct kunit *test) +{ + struct drm_test_modes_priv *priv = test->priv; + struct drm_display_mode *mode; + + mode = drm_analog_tv_mode(priv->drm, + DRM_MODE_TV_MODE_PAL, + 13500 * HZ_PER_KHZ, 720, 576, + true); + KUNIT_ASSERT_NOT_NULL(test, mode); + + KUNIT_EXPECT_EQ(test, drm_mode_vrefresh(mode), 50); + KUNIT_EXPECT_EQ(test, mode->hdisplay, 720); + + /* BT.601 defines hsync_start at 732 for 576i */ + KUNIT_EXPECT_EQ(test, mode->hsync_start, 732); + + /* + * The PAL standard expects a line to take 64us. With a pixel + * clock of 13.5 MHz, a pixel takes around 74ns, so we need to + * have 64000ns / 74ns = 864. + * + * This is also mandated by BT.601. + */ + KUNIT_EXPECT_EQ(test, mode->htotal, 864); + + KUNIT_EXPECT_EQ(test, mode->vdisplay, 576); + KUNIT_EXPECT_EQ(test, mode->vtotal, 625); +} + +static void drm_test_modes_analog_tv_pal_576i_inlined(struct kunit *test) +{ + struct drm_test_modes_priv *priv = test->priv; + struct drm_display_mode *expected, *mode; + + expected = drm_analog_tv_mode(priv->drm, + DRM_MODE_TV_MODE_PAL, + 13500 * HZ_PER_KHZ, 720, 576, + true); + KUNIT_ASSERT_NOT_NULL(test, expected); + + mode = drm_mode_analog_pal_576i(priv->drm); + KUNIT_ASSERT_NOT_NULL(test, mode); + + KUNIT_EXPECT_TRUE(test, drm_mode_equal(expected, mode)); +} + +static struct kunit_case drm_modes_analog_tv_tests[] = { + KUNIT_CASE(drm_test_modes_analog_tv_ntsc_480i), + KUNIT_CASE(drm_test_modes_analog_tv_ntsc_480i_inlined), + KUNIT_CASE(drm_test_modes_analog_tv_pal_576i), + KUNIT_CASE(drm_test_modes_analog_tv_pal_576i_inlined), + { } +}; + +static struct kunit_suite drm_modes_analog_tv_test_suite = { + .name = "drm_modes_analog_tv", + .init = drm_test_modes_init, + .exit = drm_test_modes_exit, + .test_cases = drm_modes_analog_tv_tests, +}; + +kunit_test_suite(drm_modes_analog_tv_test_suite); + +MODULE_AUTHOR("Maxime Ripard <maxime@cerno.tech>"); +MODULE_LICENSE("GPL"); |