On DP HDCP1.4 and 2.2, when CP_IRQ is received, start the link
integrity check for the HDCP version that is enabled.
v2:
Rebased. Function name is changed.
v3:
No Changes.
v4:
No Changes.
v5:
No Changes.
v6:
%s/_in_force/_in_use [Sean Paul]
v7:
Rebased.
Signed-off-by: Ramalingam C <ramalingam.c@xxxxxxxxx>
cc: Sean Paul <seanpaul@xxxxxxxxxxxx>
Reviewed-by: Sean Paul <seanpaul@xxxxxxxxxxxx>
---
drivers/gpu/drm/i915/intel_dp.c | 2 +-
drivers/gpu/drm/i915/intel_drv.h | 2 +-
drivers/gpu/drm/i915/intel_hdcp.c | 29 +++++++++++++++++++++++++++++
3 files changed, 31 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index bd83ee585cd3..11699688c36a 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -4484,7 +4484,7 @@ 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)
- intel_hdcp_check_link(intel_dp->attached_connector);
+ intel_hdcp_handle_cp_irq(intel_dp->attached_connector);
if (sink_irq_vector & DP_SINK_SPECIFIC_IRQ)
DRM_DEBUG_DRIVER("Sink specific irq unhandled\n");
}
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index be12b7928375..af580eb171a5 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -2001,10 +2001,10 @@ int intel_hdcp_init(struct intel_connector *connector,
bool hdcp2_supported);
int intel_hdcp_enable(struct intel_connector *connector);
int intel_hdcp_disable(struct intel_connector *connector);
-int intel_hdcp_check_link(struct intel_connector *connector);
bool is_hdcp_supported(struct drm_i915_private *dev_priv, enum port port);
int intel_hdcp_component_init(struct drm_i915_private *dev_priv);
bool is_hdcp2_supported(struct drm_i915_private *dev_priv);
+void intel_hdcp_handle_cp_irq(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 89e913732b2d..1f6bc1155405 100644
--- a/drivers/gpu/drm/i915/intel_hdcp.c
+++ b/drivers/gpu/drm/i915/intel_hdcp.c
@@ -93,6 +93,26 @@ static bool intel_hdcp2_capable(struct intel_connector *connector)
return capable;
}
+static inline bool intel_hdcp_in_use(struct intel_connector *connector)
+{
+ struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
+ enum port port = connector->encoder->port;
+ u32 reg;
+
+ reg = I915_READ(PORT_HDCP_STATUS(port));
+ return reg & (HDCP_STATUS_AUTH | HDCP_STATUS_ENC);
+}
+
+static inline bool intel_hdcp2_in_use(struct intel_connector *connector)
+{
+ struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
+ enum port port = connector->encoder->port;
+ u32 reg;
+
+ reg = I915_READ(HDCP2_STATUS_DDI(port));
+ return reg & (LINK_ENCRYPTION_STATUS | LINK_AUTH_STATUS);
+}
+
static int intel_hdcp_poll_ksv_fifo(struct intel_digital_port *intel_dig_port,
const struct intel_hdcp_shim *shim)
{
@@ -1795,3 +1815,12 @@ void intel_hdcp_atomic_check(struct drm_connector *connector,
new_state->crtc);
crtc_state->mode_changed = true;
}
+
+/* Handles the CP_IRQ raised from the DP HDCP sink */
+void intel_hdcp_handle_cp_irq(struct intel_connector *connector)
+{
+ if (intel_hdcp_in_use(connector))
+ intel_hdcp_check_link(connector);
+ else if (intel_hdcp2_in_use(connector))
+ intel_hdcp2_check_link(connector);
+}
--
2.7.4
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