linux-kernel - Re: [PATCH 08/24] drm/tests: Add a test for DRM managed actions

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Date:   Fri, 25 Nov 2022 11:52:35 +0100
From:   Javier Martinez Canillas <javierm@...hat.com>
To:     Maxime Ripard <maxime@...no.tech>,
        Maxime Ripard <mripard@...nel.org>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Daniel Vetter <daniel@...ll.ch>,
        David Airlie <airlied@...il.com>,
        Thomas Zimmermann <tzimmermann@...e.de>
Cc:     David Gow <davidgow@...gle.com>, linaro-mm-sig@...ts.linaro.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-kselftest@...r.kernel.org,
        Maíra Canal <mairacanal@...eup.net>,
        linux-media@...r.kernel.org, kunit-dev@...glegroups.com,
        dri-devel@...ts.freedesktop.org,
        Brendan Higgins <brendan.higgins@...ux.dev>,
        linux-kernel@...r.kernel.org,
        Dave Stevenson <dave.stevenson@...pberrypi.com>
Subject: Re: [PATCH 08/24] drm/tests: Add a test for DRM managed actions

On 11/23/22 16:25, Maxime Ripard wrote:
> DRM-managed actions are supposed to be ran whenever the device is
> released. Let's introduce a basic unit test to make sure it happens.
> 
> Signed-off-by: Maxime Ripard <maxime@...no.tech>
> ---
>  drivers/gpu/drm/tests/Makefile           |  1 +
>  drivers/gpu/drm/tests/drm_managed_test.c | 68 ++++++++++++++++++++++++++++++++
>  2 files changed, 69 insertions(+)
> 
> diff --git a/drivers/gpu/drm/tests/Makefile b/drivers/gpu/drm/tests/Makefile
> index b29ef1085cad..35962c6ef0c4 100644
> --- a/drivers/gpu/drm/tests/Makefile
> +++ b/drivers/gpu/drm/tests/Makefile
> @@ -9,6 +9,7 @@ obj-$(CONFIG_DRM_KUNIT_TEST) += \
>  	drm_format_test.o \
>  	drm_framebuffer_test.o \
>  	drm_kunit_helpers.o \
> +	drm_managed_test.o \
>  	drm_mm_test.o \
>  	drm_plane_helper_test.o \
>  	drm_rect_test.o
> diff --git a/drivers/gpu/drm/tests/drm_managed_test.c b/drivers/gpu/drm/tests/drm_managed_test.c
> new file mode 100644
> index 000000000000..4fc11b289d9e
> --- /dev/null
> +++ b/drivers/gpu/drm/tests/drm_managed_test.c
> @@ -0,0 +1,68 @@
> +// SPDX-License-Identifier: GPL-2.0
> +
> +#include <drm/drm_drv.h>
> +#include <drm/drm_managed.h>
> +
> +#include <kunit/resource.h>
> +
> +#include <linux/device.h>
> +
> +#include "drm_kunit_helpers.h"
> +
> +#define TEST_TIMEOUT_MS	100
> +

Why did you choose this timeout value? Maybe we can add some comments
explaining the rationale.

Reviewed-by: Javier Martinez Canillas <javierm@...hat.com>

-- 
Best regards,

Javier Martinez Canillas
Core Platforms
Red Hat