[PATCH 43/43] drm/i915: Invoke check link on CP_IRQ of DP

From: Ramalingam C <ramalingam.c@intel.com>
To: seanpaul@chromium.org, intel-gfx@lists.freedesktop.org,
	rodrigo.vivi@intel.com, daniel.vetter@ffwll.ch
Cc: tomas.winkler@intel.com
Subject: [PATCH 43/43] drm/i915: Invoke check link on CP_IRQ of DP
Date: Wed, 14 Feb 2018 19:43:58 +0530	[thread overview]
Message-ID: <1518617638-21684-44-git-send-email-ramalingam.c@intel.com> (raw)
In-Reply-To: <1518617638-21684-1-git-send-email-ramalingam.c@intel.com>

On DP HDCP1.4 and 2.2, when CP_IRQ is received, start the link
integrity check for the HDCP version that is enabled.

Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
---
 drivers/gpu/drm/i915/intel_dp.c   |  9 +++------
 drivers/gpu/drm/i915/intel_drv.h  |  2 +-
 drivers/gpu/drm/i915/intel_hdcp.c | 11 ++++++++++-
 3 files changed, 14 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index ec929b1ff0ae..46e1a0cce2d5 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -4438,8 +4438,10 @@ 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) {
-			if (connector->hdcp)
+			if (connector->hdcp) {
+				intel_hdcp_cp_irq_received(connector);
 				complete(&connector->hdcp->cp_irq_recved);
+			}
 		}
 
 		if (sink_irq_vector & DP_SINK_SPECIFIC_IRQ)
@@ -5799,11 +5801,6 @@ intel_dp_hpd_pulse(struct intel_digital_port *intel_dig_port, bool long_hpd)
 		drm_modeset_acquire_fini(&ctx);
 		WARN(iret, "Acquiring modeset locks failed with %i\n", iret);
 
-		/* Short pulse can signify loss of hdcp authentication */
-		if (intel_dp->attached_connector->hdcp)
-			intel_hdcp_check_link(
-					intel_dp->attached_connector->hdcp);
-
 		if (!handled) {
 			intel_dp->detect_done = false;
 			goto put_power;
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 842a22502763..4b5fd92c115e 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -1954,8 +1954,8 @@ int intel_hdcp_init(struct intel_connector *connector,
 		    const struct intel_hdcp2_shim *hdcp2_shim);
 int intel_hdcp_enable(struct intel_connector *connector);
 int intel_hdcp_disable(struct intel_connector *connector);
-int intel_hdcp_check_link(struct intel_hdcp *hdcp);
 bool is_hdcp_supported(struct drm_i915_private *dev_priv, enum port port);
+void intel_hdcp_cp_irq_received(struct intel_connector *connector);
 
 /* intel_psr.c */
 #define CAN_PSR(dev_priv) (HAS_PSR(dev_priv) && dev_priv->psr.sink_support)
diff --git a/drivers/gpu/drm/i915/intel_hdcp.c b/drivers/gpu/drm/i915/intel_hdcp.c
index bb56e4e595d8..ab482082c5e4 100644
--- a/drivers/gpu/drm/i915/intel_hdcp.c
+++ b/drivers/gpu/drm/i915/intel_hdcp.c
@@ -27,6 +27,7 @@ static int _intel_hdcp2_disable(struct intel_hdcp *hdcp);
 static void intel_hdcp2_check_work(struct work_struct *work);
 static int intel_hdcp2_check_link(struct intel_hdcp *hdcp);
 static void intel_hdcp2_exit(struct intel_connector *connector);
+static int intel_hdcp_check_link(struct intel_hdcp *hdcp);
 
 static inline bool intel_hdcp1_supported(struct intel_hdcp *hdcp)
 {
@@ -1024,7 +1025,7 @@ void intel_hdcp_atomic_check(struct drm_connector *connector,
 }
 
 /* Implements Part 3 of the HDCP authorization procedure */
-int intel_hdcp_check_link(struct intel_hdcp *hdcp)
+static int intel_hdcp_check_link(struct intel_hdcp *hdcp)
 {
 	struct intel_connector *connector = hdcp->connector;
 	struct drm_i915_private *dev_priv = connector->base.dev->dev_private;
@@ -1789,3 +1790,11 @@ static int intel_hdcp2_check_link(struct intel_hdcp *hdcp)
 	mutex_unlock(&hdcp->hdcp_mutex);
 	return ret;
 }
+
+void intel_hdcp_cp_irq_received(struct intel_connector *connector)
+{
+	if (intel_hdcp_in_force(connector->hdcp))
+		intel_hdcp_check_link(connector->hdcp);
+	else if (intel_hdcp2_in_force(connector->hdcp))
+		intel_hdcp2_check_link(connector->hdcp);
+}
-- 
2.7.4

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