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drm/tests: Add helper to create mock crtc

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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
This commit is contained in:
Maxime Ripard 2024-02-22 19:13:50 +01:00
parent 7a48da0feb
commit 51f9072038
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GPG Key ID: E3EF0D6F671851C5
2 changed files with 72 additions and 0 deletions
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62
drivers/gpu/drm/tests/drm_kunit_helpers.c
View File

@ -249,5 +249,67 @@ drm_kunit_helper_create_primary_plane(struct kunit *test,
}
EXPORT_SYMBOL_GPL(drm_kunit_helper_create_primary_plane);
static const struct drm_crtc_helper_funcs default_crtc_helper_funcs = {
};
static const struct drm_crtc_funcs default_crtc_funcs = {
.atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
.atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
.reset = drm_atomic_helper_crtc_reset,
};
/**
* drm_kunit_helper_create_crtc - Creates a mock CRTC for a KUnit test
* @test: The test context object
* @drm: The device to alloc the plane for
* @primary: Primary plane for CRTC
* @cursor: Cursor plane for CRTC. Optional.
* @funcs: Callbacks for the new plane. Optional.
* @helper_funcs: Helpers callbacks for the new plane. Optional.
*
* This allocates and initializes a mock struct &drm_crtc meant to be
* part of a mock device for a KUnit test.
*
* Resources will be cleaned up automatically.
*
* @funcs will default to the default helpers implementations.
* @helper_funcs will default to an empty implementation.
*
* Returns:
* A pointer to the new CRTC, or an ERR_PTR() otherwise.
*/
struct drm_crtc *
drm_kunit_helper_create_crtc(struct kunit *test,
struct drm_device *drm,
struct drm_plane *primary,
struct drm_plane *cursor,
const struct drm_crtc_funcs *funcs,
const struct drm_crtc_helper_funcs *helper_funcs)
{
struct drm_crtc *crtc;
int ret;
if (!funcs)
funcs = &default_crtc_funcs;
if (!helper_funcs)
helper_funcs = &default_crtc_helper_funcs;
crtc = drmm_kzalloc(drm, sizeof(*crtc), GFP_KERNEL);
KUNIT_ASSERT_NOT_NULL(test, crtc);
ret = drmm_crtc_init_with_planes(drm, crtc,
primary,
cursor,
funcs,
NULL);
KUNIT_ASSERT_EQ(test, ret, 0);
drm_crtc_helper_add(crtc, helper_funcs);
return crtc;
}
EXPORT_SYMBOL_GPL(drm_kunit_helper_create_crtc);
MODULE_AUTHOR("Maxime Ripard <maxime@cerno.tech>");
MODULE_LICENSE("GPL");

10
include/drm/drm_kunit_helpers.h
View File

@ -9,6 +9,8 @@
#include <kunit/test.h>
struct drm_crtc_funcs;
struct drm_crtc_helper_funcs;
struct drm_device;
struct drm_plane_funcs;
struct drm_plane_helper_funcs;
@ -110,4 +112,12 @@ drm_kunit_helper_create_primary_plane(struct kunit *test,
unsigned int num_formats,
const uint64_t *modifiers);
struct drm_crtc *
drm_kunit_helper_create_crtc(struct kunit *test,
struct drm_device *drm,
struct drm_plane *primary,
struct drm_plane *cursor,
const struct drm_crtc_funcs *funcs,
const struct drm_crtc_helper_funcs *helper_funcs);
#endif // DRM_KUNIT_HELPERS_H_