Thomas Zimmermann <tzimmermann@xxxxxxx> writes:
Hello Thomas,
Thanks a lot for the feedback!
> Hi Javier,
>
> this patch is completely broken. It's easy to fix though.
>
> Am 21.07.23 um 09:09 schrieb Javier Martinez Canillas:
[...]
>> +struct ssd130x_plane_state {
>> + struct drm_plane_state base;
>
> You need to use a struct drm_shadow_plane_state here.
>
Yes, I already noticed this when testing Arnd's patch to drop
DRM_GEM_SHADOW_PLANE_FUNCS. I already have a patch ready.
[...]
+
>> static const struct drm_plane_helper_funcs ssd130x_primary_plane_helper_funcs = {
>> DRM_GEM_SHADOW_PLANE_HELPER_FUNCS,
>
> This macro sets the callbacks that vmap/vunmap the GEM buffer during the
> display update. They expect to upcast from drm_plane_state to
> drm_shadow_plane_state. And hence, your driver's plane state needs to
> inherit from drm_shadow_plane_state.
>
Yup. I missed that. I'm now testing my patch and will post it.
--
Best regards,
Javier Martinez Canillas
Core Platforms
Red Hat
