> > +   /**
> > +    * Pointer to a u32 array of &drm_panfrost_submit_bo_desc objects. This
> > +    * field is meant to replace &drm_panfrost_submit.bo_handles which did
> > +    * not provide enough information to relax synchronization between
> > +    * jobs that only only read the BO they share. When both
> > +    * &drm_panfrost_submit.bo_handles and &drm_panfrost_submit.bo_descs
> > +    * are provided, drm_panfrost_submit.bo_handles is ignored.
> > +    */
> > +   __u64 bo_descs;
> > +
> > +   /**
> > +    * Number of BO descriptors passed in (size is that times
> > +    * sizeof(drm_panfrost_submit_bo_desc)).
> > +    */
> > +   __u32 bo_desc_count;
> 
> We don't really need another count field. bo_handle_count could be
> re-used. Indeed this could even be handled with just a flags field with
> a new flag specifying that bo_handles no longer points to handles but to
> bo_desc objects instead.

This seems like the cleaniest approach (also bumping the ABI version).
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