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Date: Mon, 26 Feb 2024 09:27:36 -0300
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Subject: Re: [PATCH v7 05/36] drm/tests: connector: Add tests for
 drmm_connector_init
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To: Maxime Ripard <mripard@kernel.org>,
 Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
 Thomas Zimmermann <tzimmermann@suse.de>, David Airlie <airlied@gmail.com>,
 Daniel Vetter <daniel@ffwll.ch>, Jonathan Corbet <corbet@lwn.net>,
 Sandy Huang <hjc@rock-chips.com>, =?UTF-8?Q?Heiko_St=C3=BCbner?=
 <heiko@sntech.de>, Chen-Yu Tsai <wens@csie.org>,
 Jernej Skrabec <jernej.skrabec@gmail.com>,
 Samuel Holland <samuel@sholland.org>
Cc: Hans Verkuil <hverkuil@xs4all.nl>,
 Sebastian Wick <sebastian.wick@redhat.com>,
 =?UTF-8?B?VmlsbGUgU3lyasOkbMOk?= <ville.syrjala@linux.intel.com>,
 dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org,
 linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
 linux-media@vger.kernel.org, linux-rockchip@lists.infradead.org,
 linux-sunxi@lists.linux.dev
References: <20240222-kms-hdmi-connector-state-v7-0-8f4af575fce2@kernel.org>
 <20240222-kms-hdmi-connector-state-v7-5-8f4af575fce2@kernel.org>
From: =?UTF-8?Q?Ma=C3=ADra_Canal?= <mcanal@igalia.com>
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In-Reply-To: <20240222-kms-hdmi-connector-state-v7-5-8f4af575fce2@kernel.org>
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On 2/22/24 15:13, Maxime Ripard wrote:
> drmm_connector_init is the preferred function to initialize a
> drm_connector structure. Let's add a bunch of unit tests for it.
> 
> Signed-off-by: Maxime Ripard <mripard@kernel.org>

Reviewed-by: Maíra Canal <mcanal@igalia.com>

Best Regards,
- Maíra

> ---
>   drivers/gpu/drm/tests/drm_connector_test.c | 170 ++++++++++++++++++++++++++++-
>   1 file changed, 169 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/tests/drm_connector_test.c b/drivers/gpu/drm/tests/drm_connector_test.c
> index c66aa2dc8d9d..a268847be8d1 100644
> --- a/drivers/gpu/drm/tests/drm_connector_test.c
> +++ b/drivers/gpu/drm/tests/drm_connector_test.c
> @@ -3,10 +3,175 @@
>    * Kunit test for drm_modes functions
>    */
>   
> +#include <linux/i2c.h>
> +
> +#include <drm/drm_atomic_state_helper.h>
>   #include <drm/drm_connector.h>
> +#include <drm/drm_drv.h>
> +#include <drm/drm_kunit_helpers.h>
>   
>   #include <kunit/test.h>
>   
> +struct drm_connector_init_priv {
> +	struct drm_device drm;
> +	struct drm_connector connector;
> +	struct i2c_adapter ddc;
> +};
> +
> +static const struct drm_connector_funcs dummy_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,
> +};
> +
> +static int dummy_ddc_xfer(struct i2c_adapter *adapter,
> +			  struct i2c_msg *msgs, int num)
> +{
> +	return num;
> +}
> +
> +static u32 dummy_ddc_func(struct i2c_adapter *adapter)
> +{
> +	return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
> +}
> +
> +static const struct i2c_algorithm dummy_ddc_algorithm = {
> +	.master_xfer = dummy_ddc_xfer,
> +	.functionality = dummy_ddc_func,
> +};
> +
> +static void i2c_del_adapter_wrapper(void *ptr)
> +{
> +	struct i2c_adapter *adap = ptr;
> +
> +	i2c_del_adapter(adap);
> +}
> +
> +static int drm_test_connector_init(struct kunit *test)
> +{
> +	struct drm_connector_init_priv *priv;
> +	struct device *dev;
> +	int ret;
> +
> +	dev = drm_kunit_helper_alloc_device(test);
> +	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, dev);
> +
> +	priv = drm_kunit_helper_alloc_drm_device(test, dev,
> +						 struct drm_connector_init_priv, drm,
> +						 DRIVER_MODESET | DRIVER_ATOMIC);
> +	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, priv);
> +
> +	strscpy(priv->ddc.name, "dummy-connector-ddc", sizeof(priv->ddc.name));
> +	priv->ddc.owner = THIS_MODULE;
> +	priv->ddc.algo = &dummy_ddc_algorithm;
> +	priv->ddc.dev.parent = dev;
> +
> +	ret = i2c_add_adapter(&priv->ddc);
> +	KUNIT_ASSERT_EQ(test, ret, 0);
> +
> +	ret = kunit_add_action_or_reset(test, i2c_del_adapter_wrapper, &priv->ddc);
> +	KUNIT_ASSERT_EQ(test, ret, 0);
> +
> +	test->priv = priv;
> +	return 0;
> +}
> +
> +/*
> + * Test that the registration of a bog standard connector works as
> + * expected and doesn't report any error.
> + */
> +static void drm_test_drmm_connector_init(struct kunit *test)
> +{
> +	struct drm_connector_init_priv *priv = test->priv;
> +	int ret;
> +
> +	ret = drmm_connector_init(&priv->drm, &priv->connector,
> +				  &dummy_funcs,
> +				  DRM_MODE_CONNECTOR_HDMIA,
> +				  &priv->ddc);
> +	KUNIT_EXPECT_EQ(test, ret, 0);
> +}
> +
> +/*
> + * Test that the registration of a connector without a DDC adapter
> + * doesn't report any error.
> + */
> +static void drm_test_drmm_connector_init_null_ddc(struct kunit *test)
> +{
> +	struct drm_connector_init_priv *priv = test->priv;
> +	int ret;
> +
> +	ret = drmm_connector_init(&priv->drm, &priv->connector,
> +				  &dummy_funcs,
> +				  DRM_MODE_CONNECTOR_HDMIA,
> +				  NULL);
> +	KUNIT_EXPECT_EQ(test, ret, 0);
> +}
> +
> +/*
> + * Test that the registration of a connector succeeds for all possible
> + * connector types.
> + */
> +static void drm_test_drmm_connector_init_type_valid(struct kunit *test)
> +{
> +       struct drm_connector_init_priv *priv = test->priv;
> +       unsigned int connector_type = *(unsigned int *)test->param_value;
> +       int ret;
> +
> +       ret = drmm_connector_init(&priv->drm, &priv->connector,
> +				 &dummy_funcs,
> +				 connector_type,
> +				 &priv->ddc);
> +       KUNIT_EXPECT_EQ(test, ret, 0);
> +}
> +
> +static const unsigned int drm_connector_init_type_valid_tests[] = {
> +	DRM_MODE_CONNECTOR_Unknown,
> +	DRM_MODE_CONNECTOR_VGA,
> +	DRM_MODE_CONNECTOR_DVII,
> +	DRM_MODE_CONNECTOR_DVID,
> +	DRM_MODE_CONNECTOR_DVIA,
> +	DRM_MODE_CONNECTOR_Composite,
> +	DRM_MODE_CONNECTOR_SVIDEO,
> +	DRM_MODE_CONNECTOR_LVDS,
> +	DRM_MODE_CONNECTOR_Component,
> +	DRM_MODE_CONNECTOR_9PinDIN,
> +	DRM_MODE_CONNECTOR_DisplayPort,
> +	DRM_MODE_CONNECTOR_HDMIA,
> +	DRM_MODE_CONNECTOR_HDMIB,
> +	DRM_MODE_CONNECTOR_TV,
> +	DRM_MODE_CONNECTOR_eDP,
> +	DRM_MODE_CONNECTOR_VIRTUAL,
> +	DRM_MODE_CONNECTOR_DSI,
> +	DRM_MODE_CONNECTOR_DPI,
> +	DRM_MODE_CONNECTOR_WRITEBACK,
> +	DRM_MODE_CONNECTOR_SPI,
> +	DRM_MODE_CONNECTOR_USB,
> +};
> +
> +static void drm_connector_init_type_desc(const unsigned int *type, char *desc)
> +{
> +	sprintf(desc, "%s", drm_get_connector_type_name(*type));
> +}
> +
> +KUNIT_ARRAY_PARAM(drm_connector_init_type_valid,
> +		  drm_connector_init_type_valid_tests,
> +		  drm_connector_init_type_desc);
> +
> +static struct kunit_case drmm_connector_init_tests[] = {
> +	KUNIT_CASE(drm_test_drmm_connector_init),
> +	KUNIT_CASE(drm_test_drmm_connector_init_null_ddc),
> +	KUNIT_CASE_PARAM(drm_test_drmm_connector_init_type_valid,
> +			 drm_connector_init_type_valid_gen_params),
> +	{ }
> +};
> +
> +static struct kunit_suite drmm_connector_init_test_suite = {
> +	.name = "drmm_connector_init",
> +	.init = drm_test_connector_init,
> +	.test_cases = drmm_connector_init_tests,
> +};
> +
>   struct drm_get_tv_mode_from_name_test {
>   	const char *name;
>   	enum drm_connector_tv_mode expected_mode;
> @@ -70,7 +235,10 @@ static struct kunit_suite drm_get_tv_mode_from_name_test_suite = {
>   	.test_cases = drm_get_tv_mode_from_name_tests,
>   };
>   
> -kunit_test_suite(drm_get_tv_mode_from_name_test_suite);
> +kunit_test_suites(
> +	&drmm_connector_init_test_suite,
> +	&drm_get_tv_mode_from_name_test_suite
> +);
>   
>   MODULE_AUTHOR("Maxime Ripard <maxime@cerno.tech>");
>   MODULE_LICENSE("GPL");
>