sound/soc/soc-card-test.c

Source file repositories/reference/linux-study-clean/sound/soc/soc-card-test.c

File Facts

System
Linux kernel
Corpus path
sound/soc/soc-card-test.c
Extension
.c
Size
3511 bytes
Lines
130
Domain
Driver Families
Bucket
sound/soc
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

struct soc_card_test_priv {
	struct device *card_dev;
	struct snd_soc_card *card;
};

static const struct snd_kcontrol_new test_card_controls[] = {
	SOC_SINGLE("Fee", SND_SOC_NOPM, 0, 1, 0),
	SOC_SINGLE("Fi", SND_SOC_NOPM, 1, 1, 0),
	SOC_SINGLE("Fo", SND_SOC_NOPM, 2, 1, 0),
	SOC_SINGLE("Fum", SND_SOC_NOPM, 3, 1, 0),
	SOC_SINGLE("Left Fee", SND_SOC_NOPM, 4, 1, 0),
	SOC_SINGLE("Right Fee", SND_SOC_NOPM, 5, 1, 0),
	SOC_SINGLE("Left Fi", SND_SOC_NOPM, 6, 1, 0),
	SOC_SINGLE("Right Fi", SND_SOC_NOPM, 7, 1, 0),
	SOC_SINGLE("Left Fo", SND_SOC_NOPM, 8, 1, 0),
	SOC_SINGLE("Right Fo", SND_SOC_NOPM, 9, 1, 0),
	SOC_SINGLE("Left Fum", SND_SOC_NOPM, 10, 1, 0),
	SOC_SINGLE("Right Fum", SND_SOC_NOPM, 11, 1, 0),
};

static void test_snd_soc_card_get_kcontrol(struct kunit *test)
{
	struct soc_card_test_priv *priv = test->priv;
	struct snd_soc_card *card = priv->card;
	struct snd_kcontrol *kc;
	struct soc_mixer_control *mc;
	int i, ret;

	ret = snd_soc_add_card_controls(card, test_card_controls, ARRAY_SIZE(test_card_controls));
	KUNIT_ASSERT_EQ(test, ret, 0);

	/* Look up every control */
	for (i = 0; i < ARRAY_SIZE(test_card_controls); ++i) {
		kc = snd_soc_card_get_kcontrol(card, test_card_controls[i].name);
		KUNIT_EXPECT_NOT_ERR_OR_NULL_MSG(test, kc, "Failed to find '%s'\n",
						 test_card_controls[i].name);
		if (!kc)
			continue;

		/* Test that it is the correct control */
		mc = (struct soc_mixer_control *)kc->private_value;
		KUNIT_EXPECT_EQ_MSG(test, mc->shift, i, "For '%s'\n", test_card_controls[i].name);
	}

	/* Test some names that should not be found */
	kc = snd_soc_card_get_kcontrol(card, "None");
	KUNIT_EXPECT_NULL(test, kc);

	kc = snd_soc_card_get_kcontrol(card, "Left None");
	KUNIT_EXPECT_NULL(test, kc);

	kc = snd_soc_card_get_kcontrol(card, "Left");
	KUNIT_EXPECT_NULL(test, kc);

	kc = snd_soc_card_get_kcontrol(card, NULL);
	KUNIT_EXPECT_NULL(test, kc);
}

static int soc_card_test_case_init(struct kunit *test)
{
	struct soc_card_test_priv *priv;
	int ret;

	priv = kunit_kzalloc(test, sizeof(*priv), GFP_KERNEL);
	if (!priv)
		return -ENOMEM;

	test->priv = priv;

	priv->card = kunit_kzalloc(test, sizeof(*priv->card), GFP_KERNEL);
	if (!priv->card)
		return -ENOMEM;

	priv->card_dev = kunit_device_register(test, "sound-soc-card-test");
	priv->card_dev = get_device(priv->card_dev);
	if (!priv->card_dev)
		return -ENODEV;

	priv->card->name = "soc-card-test";
	priv->card->dev = priv->card_dev;
	priv->card->owner = THIS_MODULE;

	ret = snd_soc_register_card(priv->card);
	if (ret) {
		put_device(priv->card_dev);
		return ret;
	}

	return 0;
}

Annotation

Implementation Notes