[Intel-gfx] [PATCH v4 3/4] drm/i915: Move audio_connector to intel_encoder

[Pandiyan, Dhinakaran]

Confirmed on IRC, Lyude is fine with carrying over R-B from previous
version.


On Wed, 2016-08-24 at 00:22 -0700, Dhinakaran Pandiyan wrote:
> With DP MST, a digital_port can carry more than one audio stream. Hence,
> more than one audio_connector needs to be attached to intel_digital_port in
> such cases. However, each stream is associated with an unique encoder. So,
> instead of creating an array of audio_connectors per port, move
> audio_connector from struct intel_digital_port to struct intel_encoder.
> This also simplifies access to the right audio_connector from codec
> functions in intel_audio.c that receive intel_encoder.
> 
> v2: Removed locals that are not needed anymore.
> 
> Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandiyan at intel.com>
> ---
>  drivers/gpu/drm/i915/intel_audio.c | 12 ++++--------
>  drivers/gpu/drm/i915/intel_drv.h   |  4 ++--
>  2 files changed, 6 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/intel_audio.c b/drivers/gpu/drm/i915/intel_audio.c
> index 5a41439..b86bfad 100644
> --- a/drivers/gpu/drm/i915/intel_audio.c
> +++ b/drivers/gpu/drm/i915/intel_audio.c
> @@ -490,7 +490,6 @@ void intel_audio_codec_enable(struct intel_encoder *intel_encoder)
>  	struct drm_connector *connector;
>  	struct drm_i915_private *dev_priv = to_i915(encoder->dev);
>  	struct i915_audio_component *acomp = dev_priv->audio_component;
> -	struct intel_digital_port *intel_dig_port = enc_to_dig_port(encoder);
>  	enum port port = intel_encoder->attached_port;
>  
>  	connector = drm_select_eld(encoder);
> @@ -515,7 +514,7 @@ void intel_audio_codec_enable(struct intel_encoder *intel_encoder)
>  						     adjusted_mode);
>  
>  	mutex_lock(&dev_priv->av_mutex);
> -	intel_dig_port->audio_connector = connector;
> +	intel_encoder->audio_connector = connector;
>  	/* referred in audio callbacks */
>  	dev_priv->dig_port_map[port] = intel_encoder;
>  	mutex_unlock(&dev_priv->av_mutex);
> @@ -536,14 +535,13 @@ void intel_audio_codec_disable(struct intel_encoder *intel_encoder)
>  	struct drm_encoder *encoder = &intel_encoder->base;
>  	struct drm_i915_private *dev_priv = to_i915(encoder->dev);
>  	struct i915_audio_component *acomp = dev_priv->audio_component;
> -	struct intel_digital_port *intel_dig_port = enc_to_dig_port(encoder);
>  	enum port port = intel_encoder->attached_port;
>  
>  	if (dev_priv->display.audio_codec_disable)
>  		dev_priv->display.audio_codec_disable(intel_encoder);
>  
>  	mutex_lock(&dev_priv->av_mutex);
> -	intel_dig_port->audio_connector = NULL;
> +	intel_encoder->audio_connector = NULL;
>  	dev_priv->dig_port_map[port] = NULL;
>  	mutex_unlock(&dev_priv->av_mutex);
>  
> @@ -704,7 +702,6 @@ static int i915_audio_component_get_eld(struct device *dev, int port,
>  {
>  	struct drm_i915_private *dev_priv = dev_to_i915(dev);
>  	struct intel_encoder *intel_encoder;
> -	struct intel_digital_port *intel_dig_port;
>  	const u8 *eld;
>  	int ret = -EINVAL;
>  
> @@ -713,10 +710,9 @@ static int i915_audio_component_get_eld(struct device *dev, int port,
>  	/* intel_encoder might be NULL for DP MST */
>  	if (intel_encoder) {
>  		ret = 0;
> -		intel_dig_port = enc_to_dig_port(&intel_encoder->base);
> -		*enabled = intel_dig_port->audio_connector != NULL;
> +		*enabled = intel_encoder->audio_connector != NULL;
>  		if (*enabled) {
> -			eld = intel_dig_port->audio_connector->eld;
> +			eld = intel_encoder->audio_connector->eld;
>  			ret = drm_eld_size(eld);
>  			memcpy(buf, eld, min(max_bytes, ret));
>  		}
> diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
> index 68bf134..30186bf 100644
> --- a/drivers/gpu/drm/i915/intel_drv.h
> +++ b/drivers/gpu/drm/i915/intel_drv.h
> @@ -232,6 +232,8 @@ struct intel_encoder {
>  	void (*suspend)(struct intel_encoder *);
>  	int crtc_mask;
>  	enum hpd_pin hpd_pin;
> +	/* for communication with audio component; protected by av_mutex */
> +	const struct drm_connector *audio_connector;
>  };
>  
>  struct intel_panel {
> @@ -948,8 +950,6 @@ struct intel_digital_port {
>  	enum irqreturn (*hpd_pulse)(struct intel_digital_port *, bool);
>  	bool release_cl2_override;
>  	uint8_t max_lanes;
> -	/* for communication with audio component; protected by av_mutex */
> -	const struct drm_connector *audio_connector;
>  };
>  
>  struct intel_dp_mst_encoder {