[Intel-gfx] [PATCH v2 06/12] drm/i915: Factor out hdcp->value assignments

[Ramalingam C]

On 2019-12-12 at 14:02:24 -0500, Sean Paul wrote:
> From: Sean Paul <seanpaul at chromium.org>
> 
> This is a bit of housecleaning for a future patch. Instead of sprinkling
> hdcp->value assignments and prop_work scheduling everywhere, introduce a
> function to do it for us.
> 
> Signed-off-by: Sean Paul <seanpaul at chromium.org>
> Link: https://patchwork.freedesktop.org/patch/msgid/20191203173638.94919-7-sean@poorly.run #v1
LGTM.

Reviewed-by: Ramalingam C <ramalingam.c at intel.com>
> 
> Changes in v2:
> -None
> ---
>  drivers/gpu/drm/i915/display/intel_hdcp.c | 67 ++++++++++++++++-------
>  1 file changed, 46 insertions(+), 21 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_hdcp.c b/drivers/gpu/drm/i915/display/intel_hdcp.c
> index f8d56d3b2ddb..798e7e1a19fc 100644
> --- a/drivers/gpu/drm/i915/display/intel_hdcp.c
> +++ b/drivers/gpu/drm/i915/display/intel_hdcp.c
> @@ -852,6 +852,21 @@ struct intel_connector *intel_hdcp_to_connector(struct intel_hdcp *hdcp)
>  	return container_of(hdcp, struct intel_connector, hdcp);
>  }
>  
> +static void intel_hdcp_update_value(struct intel_connector *connector,
> +				    u64 value, bool update_property)
> +{
> +	struct intel_hdcp *hdcp = &connector->hdcp;
> +
> +	WARN_ON(!mutex_is_locked(&hdcp->mutex));
> +
> +	if (hdcp->value == value)
> +		return;
> +
> +	hdcp->value = value;
> +	if (update_property)
> +		schedule_work(&hdcp->prop_work);
> +}
> +
>  /* Implements Part 3 of the HDCP authorization procedure */
>  static int intel_hdcp_check_link(struct intel_connector *connector)
>  {
> @@ -878,15 +893,16 @@ static int intel_hdcp_check_link(struct intel_connector *connector)
>  			  I915_READ(HDCP_STATUS(dev_priv, cpu_transcoder,
>  						port)));
>  		ret = -ENXIO;
> -		hdcp->value = DRM_MODE_CONTENT_PROTECTION_DESIRED;
> -		schedule_work(&hdcp->prop_work);
> +		intel_hdcp_update_value(connector,
> +					DRM_MODE_CONTENT_PROTECTION_DESIRED,
> +					true);
>  		goto out;
>  	}
>  
>  	if (hdcp->shim->check_link(intel_dig_port)) {
>  		if (hdcp->value != DRM_MODE_CONTENT_PROTECTION_UNDESIRED) {
> -			hdcp->value = DRM_MODE_CONTENT_PROTECTION_ENABLED;
> -			schedule_work(&hdcp->prop_work);
> +			intel_hdcp_update_value(connector,
> +				DRM_MODE_CONTENT_PROTECTION_ENABLED, true);
>  		}
>  		goto out;
>  	}
> @@ -897,16 +913,18 @@ static int intel_hdcp_check_link(struct intel_connector *connector)
>  	ret = _intel_hdcp_disable(connector);
>  	if (ret) {
>  		DRM_ERROR("Failed to disable hdcp (%d)\n", ret);
> -		hdcp->value = DRM_MODE_CONTENT_PROTECTION_DESIRED;
> -		schedule_work(&hdcp->prop_work);
> +		intel_hdcp_update_value(connector,
> +					DRM_MODE_CONTENT_PROTECTION_DESIRED,
> +					true);
>  		goto out;
>  	}
>  
>  	ret = _intel_hdcp_enable(connector);
>  	if (ret) {
>  		DRM_ERROR("Failed to enable hdcp (%d)\n", ret);
> -		hdcp->value = DRM_MODE_CONTENT_PROTECTION_DESIRED;
> -		schedule_work(&hdcp->prop_work);
> +		intel_hdcp_update_value(connector,
> +					DRM_MODE_CONTENT_PROTECTION_DESIRED,
> +					true);
>  		goto out;
>  	}
>  
> @@ -1716,16 +1734,18 @@ static int intel_hdcp2_check_link(struct intel_connector *connector)
>  			  I915_READ(HDCP2_STATUS(dev_priv, cpu_transcoder,
>  						 port)));
>  		ret = -ENXIO;
> -		hdcp->value = DRM_MODE_CONTENT_PROTECTION_DESIRED;
> -		schedule_work(&hdcp->prop_work);
> +		intel_hdcp_update_value(connector,
> +					DRM_MODE_CONTENT_PROTECTION_DESIRED,
> +					true);
>  		goto out;
>  	}
>  
>  	ret = hdcp->shim->check_2_2_link(intel_dig_port);
>  	if (ret == HDCP_LINK_PROTECTED) {
>  		if (hdcp->value != DRM_MODE_CONTENT_PROTECTION_UNDESIRED) {
> -			hdcp->value = DRM_MODE_CONTENT_PROTECTION_ENABLED;
> -			schedule_work(&hdcp->prop_work);
> +			intel_hdcp_update_value(connector,
> +					DRM_MODE_CONTENT_PROTECTION_ENABLED,
> +					true);
>  		}
>  		goto out;
>  	}
> @@ -1737,8 +1757,9 @@ static int intel_hdcp2_check_link(struct intel_connector *connector)
>  		DRM_DEBUG_KMS("HDCP2.2 Downstream topology change\n");
>  		ret = hdcp2_authenticate_repeater_topology(connector);
>  		if (!ret) {
> -			hdcp->value = DRM_MODE_CONTENT_PROTECTION_ENABLED;
> -			schedule_work(&hdcp->prop_work);
> +			intel_hdcp_update_value(connector,
> +					DRM_MODE_CONTENT_PROTECTION_ENABLED,
> +					true);
>  			goto out;
>  		}
>  		DRM_DEBUG_KMS("[%s:%d] Repeater topology auth failed.(%d)\n",
> @@ -1753,8 +1774,8 @@ static int intel_hdcp2_check_link(struct intel_connector *connector)
>  	if (ret) {
>  		DRM_ERROR("[%s:%d] Failed to disable hdcp2.2 (%d)\n",
>  			  connector->base.name, connector->base.base.id, ret);
> -		hdcp->value = DRM_MODE_CONTENT_PROTECTION_DESIRED;
> -		schedule_work(&hdcp->prop_work);
> +		intel_hdcp_update_value(connector,
> +				DRM_MODE_CONTENT_PROTECTION_DESIRED, true);
>  		goto out;
>  	}
>  
> @@ -1763,8 +1784,9 @@ static int intel_hdcp2_check_link(struct intel_connector *connector)
>  		DRM_DEBUG_KMS("[%s:%d] Failed to enable hdcp2.2 (%d)\n",
>  			      connector->base.name, connector->base.base.id,
>  			      ret);
> -		hdcp->value = DRM_MODE_CONTENT_PROTECTION_DESIRED;
> -		schedule_work(&hdcp->prop_work);
> +		intel_hdcp_update_value(connector,
> +					DRM_MODE_CONTENT_PROTECTION_DESIRED,
> +					true);
>  		goto out;
>  	}
>  
> @@ -2004,8 +2026,9 @@ int intel_hdcp_enable(struct intel_connector *connector,
>  
>  	if (!ret) {
>  		schedule_delayed_work(&hdcp->check_work, check_link_interval);
> -		hdcp->value = DRM_MODE_CONTENT_PROTECTION_ENABLED;
> -		schedule_work(&hdcp->prop_work);
> +		intel_hdcp_update_value(connector,
> +					DRM_MODE_CONTENT_PROTECTION_ENABLED,
> +					true);
>  	}
>  
>  	mutex_unlock(&hdcp->mutex);
> @@ -2023,7 +2046,9 @@ int intel_hdcp_disable(struct intel_connector *connector)
>  	mutex_lock(&hdcp->mutex);
>  
>  	if (hdcp->value != DRM_MODE_CONTENT_PROTECTION_UNDESIRED) {
> -		hdcp->value = DRM_MODE_CONTENT_PROTECTION_UNDESIRED;
> +		intel_hdcp_update_value(connector,
> +					DRM_MODE_CONTENT_PROTECTION_UNDESIRED,
> +					false);
>  		if (hdcp->hdcp2_encrypted)
>  			ret = _intel_hdcp2_disable(connector);
>  		else if (hdcp->hdcp_encrypted)
> -- 
> Sean Paul, Software Engineer, Google / Chromium OS
>