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drm/tests: Add helper to create mock crtc
We're going to need a full-blown, functional, KMS device to test more components of the atomic modesetting infrastructure. Let's add a new helper to create a dumb, mocked, CRTC. By default it will create a CRTC relying only on the default helpers, but drivers are free to deviate from that. Reviewed-by: Maíra Canal <mcanal@igalia.com> Signed-off-by: Maxime Ripard <mripard@kernel.org> Link: https://patchwork.freedesktop.org/patch/msgid/20240222-kms-hdmi-connector-state-v7-4-8f4af575fce2@kernel.org
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2 changed files with 72 additions and 0 deletions
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@ -249,5 +249,67 @@ drm_kunit_helper_create_primary_plane(struct kunit *test,
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}
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EXPORT_SYMBOL_GPL(drm_kunit_helper_create_primary_plane);
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static const struct drm_crtc_helper_funcs default_crtc_helper_funcs = {
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};
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static const struct drm_crtc_funcs default_crtc_funcs = {
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.atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
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.atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
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.reset = drm_atomic_helper_crtc_reset,
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};
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/**
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* drm_kunit_helper_create_crtc - Creates a mock CRTC for a KUnit test
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* @test: The test context object
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* @drm: The device to alloc the plane for
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* @primary: Primary plane for CRTC
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* @cursor: Cursor plane for CRTC. Optional.
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* @funcs: Callbacks for the new plane. Optional.
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* @helper_funcs: Helpers callbacks for the new plane. Optional.
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*
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* This allocates and initializes a mock struct &drm_crtc meant to be
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* part of a mock device for a KUnit test.
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*
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* Resources will be cleaned up automatically.
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*
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* @funcs will default to the default helpers implementations.
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* @helper_funcs will default to an empty implementation.
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*
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* Returns:
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* A pointer to the new CRTC, or an ERR_PTR() otherwise.
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*/
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struct drm_crtc *
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drm_kunit_helper_create_crtc(struct kunit *test,
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struct drm_device *drm,
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struct drm_plane *primary,
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struct drm_plane *cursor,
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const struct drm_crtc_funcs *funcs,
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const struct drm_crtc_helper_funcs *helper_funcs)
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{
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struct drm_crtc *crtc;
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int ret;
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if (!funcs)
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funcs = &default_crtc_funcs;
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if (!helper_funcs)
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helper_funcs = &default_crtc_helper_funcs;
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crtc = drmm_kzalloc(drm, sizeof(*crtc), GFP_KERNEL);
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KUNIT_ASSERT_NOT_NULL(test, crtc);
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ret = drmm_crtc_init_with_planes(drm, crtc,
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primary,
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cursor,
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funcs,
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NULL);
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KUNIT_ASSERT_EQ(test, ret, 0);
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drm_crtc_helper_add(crtc, helper_funcs);
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return crtc;
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}
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EXPORT_SYMBOL_GPL(drm_kunit_helper_create_crtc);
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MODULE_AUTHOR("Maxime Ripard <maxime@cerno.tech>");
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MODULE_LICENSE("GPL");
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@ -9,6 +9,8 @@
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#include <kunit/test.h>
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struct drm_crtc_funcs;
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struct drm_crtc_helper_funcs;
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struct drm_device;
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struct drm_plane_funcs;
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struct drm_plane_helper_funcs;
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@ -110,4 +112,12 @@ drm_kunit_helper_create_primary_plane(struct kunit *test,
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unsigned int num_formats,
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const uint64_t *modifiers);
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struct drm_crtc *
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drm_kunit_helper_create_crtc(struct kunit *test,
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struct drm_device *drm,
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struct drm_plane *primary,
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struct drm_plane *cursor,
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const struct drm_crtc_funcs *funcs,
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const struct drm_crtc_helper_funcs *helper_funcs);
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#endif // DRM_KUNIT_HELPERS_H_
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