[Intel-gfx] [PATCH v6 16/35] drm/i915: hdcp_check_link only on CP_IRQ

[Ramalingam C]

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.
v6:
  No Change.

Signed-off-by: Ramalingam C <ramalingam.c at intel.com>
cc: Sean Paul <seanpaul at chromium.org>
Reviewed-by: Uma Shankar <uma.shankar at intel.com>
Reviewed-by: Sean Paul <seanpaul at chromium.org>
---
 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 12eb5bd33b7e..0d31c9c286e9 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 */
@@ -5456,9 +5458,6 @@ 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