[bug report] drm/vkms: Allow to configure multiple CRTCs

[Dan Carpenter]

On Fri, Aug 08, 2025 at 01:15:03PM +0200, José Expósito wrote:
> > drivers/gpu/drm/vkms/tests/vkms_config_test.c
> >     231 static void vkms_config_test_get_crtcs(struct kunit *test)
> >     232 {
> >     233         struct vkms_config *config;
> >     234         struct vkms_config_crtc *crtc_cfg;
> >     235         struct vkms_config_crtc *crtc_cfg1, *crtc_cfg2;
> >     236 
> >     237         config = vkms_config_create("test");
> >     238         KUNIT_ASSERT_NOT_ERR_OR_NULL(test, config);
> >     239 
> >     240         KUNIT_ASSERT_EQ(test, vkms_config_get_num_crtcs(config), 0);
> >     241         vkms_config_for_each_crtc(config, crtc_cfg)
> >     242                 KUNIT_FAIL(test, "Unexpected CRTC");
> >     243 
> >     244         crtc_cfg1 = vkms_config_create_crtc(config);
> >                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> > This file has no error checking.
> > 
> > I didn't send an email about it at first because this is just test code so
> > who cares, but I was recently burned by ignoring errors so now I'm going
> > through a bunch of old warnings to say that, "Hey, if the author ignores the
> > error checking that's fine, but I'm in the clear."
> > 
> >     245         KUNIT_ASSERT_EQ(test, vkms_config_get_num_crtcs(config), 1);
> 
> While the "crtc_cfg1" pointer is not checked, we check that the	number 
> of CRTCs matches the expected value and...
> 

Ah yes.  That does work...  Sorry for the noise.

regards,
dan carpenter