[PATCH 5/9] drm/i915: Enable i915 perf stream for Haswell OA unit

[Robert Bragg]

On Wed, Apr 20, 2016 at 11:52 PM, Chris Wilson <chris at chris-wilson.co.uk>
wrote:

> On Wed, Apr 20, 2016 at 03:23:10PM +0100, Robert Bragg wrote:
> > +static int i915_oa_read(struct i915_perf_stream *stream,
> > +                     struct i915_perf_read_state *read_state)
> > +{
> > +     struct drm_i915_private *dev_priv = stream->dev_priv;
> > +
> > +     return dev_priv->perf.oa.ops.read(stream, read_state);
> > +}
>
> > +     stream->destroy = i915_oa_stream_destroy;
> > +     stream->enable = i915_oa_stream_enable;
> > +     stream->disable = i915_oa_stream_disable;
> > +     stream->can_read = i915_oa_can_read;
> > +     stream->wait_unlocked = i915_oa_wait_unlocked;
> > +     stream->poll_wait = i915_oa_poll_wait;
> > +     stream->read = i915_oa_read;
>
> Why aren't these a const ops table?
>

No particular reason; I guess it just seemed straightforward enough at the
time. I suppose it avoids some redundant pointer indirection and could suit
defining streams in the future that might find it awkward to have static
ops (don't have anything like that in mind though) but it's at the expense
of a slightly larger stream struct (though also don't see that as a concern
currently).

Can change if you like.

Regards,
- Robert


> -Chris
>
> --
> Chris Wilson, Intel Open Source Technology Centre
>
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