linux-kernel - Re: [PATCH v4] drm/test: add a test suite for GEM objects backed by shmem

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Message-ID: <dkh6t5cya7tw4wz5aqrgvnqqnyzzgvbyvezxexy6pyspju5qbd@cdl4vvs7kvnt>
Date:   Fri, 24 Nov 2023 09:49:00 +0100
From:   Maxime Ripard <mripard@...nel.org>
To:     Marco Pagani <marpagan@...hat.com>
Cc:     Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Sumit Semwal <sumit.semwal@...aro.org>,
        Christian Koenig <christian.koenig@....com>,
        Javier Martinez Canillas <javierm@...hat.com>,
        linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        linux-media@...r.kernel.org, linaro-mm-sig@...ts.linaro.org
Subject: Re: [PATCH v4] drm/test: add a test suite for GEM objects backed by
 shmem

Hi,

On Thu, Nov 23, 2023 at 11:01:46AM +0100, Marco Pagani wrote:
> +static int drm_gem_shmem_test_init(struct kunit *test)
> +{
> +	struct device *dev;
> +	struct fake_dev {
> +		struct drm_device drm_dev;
> +	} *fdev;
> +

[...]

> +
> +	/*
> +	 * The DRM core will automatically initialize the GEM core and create
> +	 * a DRM Memory Manager object which provides an address space pool
> +	 * for GEM objects allocation.
> +	 */
> +	fdev = drm_kunit_helper_alloc_drm_device(test, dev, struct fake_dev,
> +						 drm_dev, DRIVER_GEM);
> +	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, fdev);

Sorry I missed it earlier, but you don't need the intermediate structure
if you use

struct drm_device *drm;

drm = __drm_kunit_helper_alloc_drm_device(test, dev, sizeof(*drm), 0, DRIVER_GEM);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, drm);

Maxime

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