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drm/vc4: tests: Introduce a mocking infrastructure

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In order to test the current atomic_check hooks we need to have a DRM
device that has roughly the same capabilities and layout that the actual
hardware. We'll also need a bunch of functions to create arbitrary
atomic states.

Let's create some helpers to create a device that behaves like the real
one, and some helpers to maintain the atomic state we want to check.

Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Reviewed-by: Maíra Canal <mcanal@igalia.com>
Link: https://lore.kernel.org/r/20221123-rpi-kunit-tests-v3-17-4615a663a84a@cerno.tech
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
This commit is contained in:
Maxime Ripard
2022-12-01 16:11:48 +01:00
parent 640dbcc91d
commit f759f5b53f
12 changed files with 511 additions and 13 deletions
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99
drivers/gpu/drm/vc4/tests/vc4_mock_output.c Normal file
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// SPDX-License-Identifier: GPL-2.0
#include <drm/drm_atomic_state_helper.h>
#include <drm/drm_atomic_uapi.h>
#include <drm/drm_connector.h>
#include <drm/drm_crtc.h>
#include <drm/drm_encoder.h>
#include <drm/drm_modeset_helper_vtables.h>
#include <kunit/test.h>
#include "vc4_mock.h"
static const struct drm_connector_helper_funcs vc4_dummy_connector_helper_funcs = {
};
static const struct drm_connector_funcs vc4_dummy_connector_funcs = {
.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
.reset = drm_atomic_helper_connector_reset,
};
struct vc4_dummy_output *vc4_dummy_output(struct kunit *test,
struct drm_device *drm,
struct drm_crtc *crtc,
enum vc4_encoder_type vc4_encoder_type,
unsigned int kms_encoder_type,
unsigned int connector_type)
{
struct vc4_dummy_output *dummy_output;
struct drm_connector *conn;
struct drm_encoder *enc;
int ret;
dummy_output = kunit_kzalloc(test, sizeof(*dummy_output), GFP_KERNEL);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, dummy_output);
dummy_output->encoder.type = vc4_encoder_type;
enc = &dummy_output->encoder.base;
ret = drmm_encoder_init(drm, enc,
NULL,
kms_encoder_type,
NULL);
KUNIT_ASSERT_EQ(test, ret, 0);
enc->possible_crtcs = drm_crtc_mask(crtc);
conn = &dummy_output->connector;
ret = drmm_connector_init(drm, conn,
&vc4_dummy_connector_funcs,
connector_type,
NULL);
KUNIT_ASSERT_EQ(test, ret, 0);
drm_connector_helper_add(conn, &vc4_dummy_connector_helper_funcs);
drm_connector_attach_encoder(conn, enc);
return dummy_output;
}
static const struct drm_display_mode default_mode = {
DRM_SIMPLE_MODE(640, 480, 64, 48)
};
int vc4_mock_atomic_add_output(struct kunit *test, struct drm_device *drm,
enum vc4_encoder_type type,
struct drm_atomic_state *state)
{
struct vc4_dummy_output *output;
struct drm_connector *conn;
struct drm_connector_state *conn_state;
struct drm_encoder *encoder;
struct drm_crtc *crtc;
struct drm_crtc_state *crtc_state;
int ret;
encoder = vc4_find_encoder_by_type(drm, type);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, encoder);
crtc = vc4_find_crtc_for_encoder(test, drm, encoder);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, crtc);
output = container_of(encoder, struct vc4_dummy_output, encoder.base);
conn = &output->connector;
conn_state = drm_atomic_get_connector_state(state, conn);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, conn_state);
ret = drm_atomic_set_crtc_for_connector(conn_state, crtc);
KUNIT_EXPECT_EQ(test, ret, 0);
crtc_state = drm_atomic_get_crtc_state(state, crtc);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, crtc_state);
ret = drm_atomic_set_mode_for_crtc(crtc_state, &default_mode);
KUNIT_EXPECT_EQ(test, ret, 0);
crtc_state->active = true;
return 0;
}