Re: [PATCH v5 19/40] drm/i915: hdcp_check_link only on CP_IRQ

[Sean Paul <seanpaul@chromium.org>]

On Wed, Jun 27, 2018 at 02:10:08PM +0530, Ramalingam C wrote:
> HDCP check link is invoked only on CP_IRQ detection, instead of all
> short pulses.
> 
> v3:
>   No Changes.
> v4:
>   Added sean in cc and collected the reviewed-by received.
> v5:
>   No Change.
> 
> Signed-off-by: Ramalingam C <ramalingam.c@intel.com>

Reviewed-by: Sean Paul <seanpaul@chromium.org>

> cc: Sean Paul <seanpaul@chromium.org>
> Reviewed-by: Uma Shankar <uma.shankar@intel.com>
> ---
>  drivers/gpu/drm/i915/intel_dp.c | 9 ++++-----
>  1 file changed, 4 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
> index 6bcc52766ea3..7467e7b3f2df 100644
> --- a/drivers/gpu/drm/i915/intel_dp.c
> +++ b/drivers/gpu/drm/i915/intel_dp.c
> @@ -4483,8 +4483,10 @@ intel_dp_short_pulse(struct intel_dp *intel_dp)
>  
>  		if (sink_irq_vector & DP_AUTOMATED_TEST_REQUEST)
>  			intel_dp_handle_test_request(intel_dp);
> -		if (sink_irq_vector & (DP_CP_IRQ | DP_SINK_SPECIFIC_IRQ))
> -			DRM_DEBUG_DRIVER("CP or sink specific irq unhandled\n");
> +		if (sink_irq_vector & DP_CP_IRQ)
> +			intel_hdcp_check_link(intel_dp->attached_connector);
> +		if (sink_irq_vector & DP_SINK_SPECIFIC_IRQ)
> +			DRM_DEBUG_DRIVER("Sink specific irq unhandled\n");
>  	}
>  
>  	/* defer to the hotplug work for link retraining if needed */
> @@ -5454,9 +5456,6 @@ intel_dp_hpd_pulse(struct intel_digital_port *intel_dig_port, bool long_hpd)
>  
>  		handled = intel_dp_short_pulse(intel_dp);
>  
> -		/* Short pulse can signify loss of hdcp authentication */
> -		intel_hdcp_check_link(intel_dp->attached_connector);
> -
>  		if (!handled) {
>  			intel_dp->detect_done = false;
>  			goto put_power;
> -- 
> 2.7.4
> 

-- 
Sean Paul, Software Engineer, Google / Chromium OS
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