[alsa-devel] [Intel-gfx] [PATCH 1/4] drm/i915: Add audio pin sense / ELD callback

[Daniel Vetter]

On Wed, Aug 19, 2015 at 10:48:55AM +0200, David Henningsson wrote:
> This callback will be called by the i915 driver to notify the hda
> driver that its HDMI information needs to be refreshed, i e,
> that audio output is now available (or unavailable) - usually as a
> result of a monitor being plugged in (or unplugged).
> 
> Signed-off-by: David Henningsson <david.henningsson at canonical.com>
> ---
>  include/drm/i915_component.h | 12 ++++++++++++
>  1 file changed, 12 insertions(+)
> 
> diff --git a/include/drm/i915_component.h b/include/drm/i915_component.h
> index c9a8b64..ab5bde37 100644
> --- a/include/drm/i915_component.h
> +++ b/include/drm/i915_component.h
> @@ -34,6 +34,18 @@ struct i915_audio_component {
>  		void (*codec_wake_override)(struct device *, bool enable);
>  		int (*get_cdclk_freq)(struct device *);
>  	} *ops;
> +
> +	const struct i915_audio_component_audio_ops {
> +		void *audio_ptr;
> +		/**
> +		 * Call from i915 driver, notifying the HDA driver that
> +		 * pin sense and/or ELD information has changed.
> +		 * @audio_ptr:		HDA driver object
> +		 * @port:		Which port has changed (PORTA / PORTB / PORTC etc)
> +		 * @port_mst_index:	Index within that port, for DisplayPort multistreaming
> +		 */
> +		void (*pin_eld_notify)(void *audio_ptr, int port, int port_mst_index);
> +	} *audio_ops;

This won't work as proper kerneldoc, but you get away with it since it's
not pulled into the drm.tmpl. See my comments for the new set_audio_rate
callback.
-Daniel

>  };
>  
>  #endif /* _I915_COMPONENT_H_ */
> -- 
> 1.9.1
> 
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> Intel-gfx at lists.freedesktop.org
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-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch