Hi, On Tue, Oct 24, 2023 at 04:09:55PM -0300, Carlos Eduardo Gallo Filho wrote: > Introduce a test to cover the creation of framebuffer with > modifier on a device that doesn't support it. > > Signed-off-by: Carlos Eduardo Gallo Filho <gcar...@disroot.org> > --- > v2: > - Reorder kunit cases alphabetically. > --- > drivers/gpu/drm/tests/drm_framebuffer_test.c | 28 ++++++++++++++++++++ > 1 file changed, 28 insertions(+) > > diff --git a/drivers/gpu/drm/tests/drm_framebuffer_test.c > b/drivers/gpu/drm/tests/drm_framebuffer_test.c > index eb76a71644e9..8a9b6d08d639 100644 > --- a/drivers/gpu/drm/tests/drm_framebuffer_test.c > +++ b/drivers/gpu/drm/tests/drm_framebuffer_test.c > @@ -403,8 +403,36 @@ static void drm_framebuffer_test_to_desc(const struct > drm_framebuffer_test *t, c > KUNIT_ARRAY_PARAM(drm_framebuffer_create, drm_framebuffer_create_cases, > drm_framebuffer_test_to_desc); > > +/* > + * This test is very similar to drm_test_framebuffer_create, except that it
We shouldn't rely on the another test for the documentation. If
drm_test_framebuffer_create is ever removed or renamed, then the reader
won't have any clue what it was supposed to test.
We should provide a documentation that doesn't require any additional
context.
> + * set dev->mode_config.fb_modifiers_not_supported member to 1, covering
> + * the case of trying to create a framebuffer with modifiers without the
> + * device really supporting it.
> + */
So I guess something like:
Test that, if a device doesn't support modifiers, a framebuffer
allocation using them will fail.
> +static void drm_test_framebuffer_modifiers_not_supported(struct kunit *test)
> +{
> + struct drm_framebuffer_test_priv *priv = test->priv;
> + struct drm_device *dev = &priv->dev;
> + int buffer_created = 0;
> +
> + /* A valid cmd with modifier */
> + struct drm_mode_fb_cmd2 cmd = {
> + .width = MAX_WIDTH, .height = MAX_HEIGHT,
> + .pixel_format = DRM_FORMAT_ABGR8888, .handles = { 1, 0, 0 },
> + .offsets = { UINT_MAX / 2, 0, 0 }, .pitches = { 4 * MAX_WIDTH,
> 0, 0 },
> + .flags = DRM_MODE_FB_MODIFIERS,
> + };
> +
> + priv->private = &buffer_created;
> + dev->mode_config.fb_modifiers_not_supported = 1;
> +
> + drm_internal_framebuffer_create(dev, &cmd, NULL);
> + KUNIT_EXPECT_EQ(test, 0, buffer_created);
We should test the returned value of drm_internal_framebuffer_create here.
Maxime
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