[RFC PATCH v2 09/17] gpu: host1x: DMA fences and userspace fence creation

[Dmitry Osipenko]

05.09.2020 13:34, Mikko Perttunen пишет:
...
>  
> +static void action_signal_fence(struct host1x_waitlist *waiter)
> +{
> +	struct host1x_syncpt_fence *f = waiter->data;
> +
> +	host1x_fence_signal(f);
> +}
> +
>  typedef void (*action_handler)(struct host1x_waitlist *waiter);
>  
>  static const action_handler action_handlers[HOST1X_INTR_ACTION_COUNT] = {
>  	action_submit_complete,
>  	action_wakeup,
>  	action_wakeup_interruptible,
> +	action_signal_fence,
>  };

My expectation is that we should remove the host1x-waiter entirely. It
comes from 2011/2012 era of the host1x driver and now duplicates
functionality provided by the dma-fence and drm-scheduler. Perhaps it
could be okay to re-use existing code for the starter, but this is
something to keep in mind that it may be better not to put much effort
into the older code.