On Wednesday 01 August 2018 04:32 PM, Shankar, Uma wrote:
-----Original Message-----
From: C, Ramalingam
Sent: Saturday, July 14, 2018 8:45 AM
To: intel-gfx@xxxxxxxxxxxxxxxxxxxxx; dri-devel@xxxxxxxxxxxxxxxxxxxxx;
daniel@xxxxxxxx; seanpaul@xxxxxxxxxxxx; Winkler, Tomas
<tomas.winkler@xxxxxxxxx>; Usyskin, Alexander <alexander.usyskin@xxxxxxxxx>;
Shankar, Uma <uma.shankar@xxxxxxxxx>
Cc: Sharma, Shashank <shashank.sharma@xxxxxxxxx>; C, Ramalingam
<ramalingam.c@xxxxxxxxx>
Subject: [PATCH v6 17/35] drm/i915: Check HDCP 1.4 and 2.2 link on CP_IRQ
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]
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 | 31
++++++++++++++++++++++++++++++-
3 files changed, 32 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 0d31c9c286e9..6dcb09430fb5 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 ce4679a0b530..82cda9a5aae3 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -1969,10 +1969,10 @@ 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 6afce9ae09ed..66d47240336f 100644
--- a/drivers/gpu/drm/i915/intel_hdcp.c
+++ b/drivers/gpu/drm/i915/intel_hdcp.c
@@ -32,6 +32,7 @@ int intel_hdcp_read_valid_bksv(struct intel_digital_port
*intel_dig_port,
const struct intel_hdcp_shim *shim, u8 *bksv); static
struct intel_digital_port *conn_to_dig_port(struct intel_connector *connector);
+static int intel_hdcp_check_link(struct intel_connector *connector);
/* Is HDCP1.4 capable on Platform and Panel */ static bool
intel_hdcp_capable(struct intel_connector *connector) @@ -66,6 +67,26 @@
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) { @@ -
928,7 +949,7 @@ void intel_hdcp_atomic_check(struct drm_connector
*connector, }
/* Implements Part 3 of the HDCP authorization procedure */ -int
intel_hdcp_check_link(struct intel_connector *connector)
+static int intel_hdcp_check_link(struct intel_connector *connector)
{
struct intel_hdcp *hdcp = &connector->hdcp;
struct drm_i915_private *dev_priv = connector->base.dev->dev_private;
@@ -1821,3 +1842,11 @@ static void intel_hdcp2_check_work(struct
work_struct *work)
schedule_delayed_work(&hdcp->hdcp2_check_work,
DRM_HDCP2_CHECK_PERIOD_MS);
}
+
+void intel_hdcp_handle_cp_irq(struct intel_connector *connector) {
+ if (intel_hdcp_in_use(connector))
+ intel_hdcp_check_link(connector);
Handle the return value. Atleast a print in case of link failures through this
path.
+ else if (intel_hdcp2_in_use(connector))
+ intel_hdcp2_check_link(connector);
Same here.
Uma,
At this handler of CP_IRQ, we don't want to handle the return of the
Link integrity check.
As CP_IRQ could be generated for LINK_INTEGRITY_FAILURE and REAUTH_REQ
and which
are handled in the check_link()
And if reauth(Disable -> Enable) fails we have nothing to do. So we need
not handle it.
Errors are already logged within check_link().
--Ram.
With above fixed.
Reviewed-by: Uma Shankar <uma.shankar@xxxxxxxxx>
+}
--
2.7.4
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