On Friday 18 May 2018 09:29 PM, Shankar, Uma wrote:
-----Original Message-----
From: dri-devel [mailto:dri-devel-bounces@xxxxxxxxxxxxxxxxxxxxx] On Behalf Of
Ramalingam C
Sent: Tuesday, April 3, 2018 7:28 PM
To: intel-gfx@xxxxxxxxxxxxxxxxxxxxx; dri-devel@xxxxxxxxxxxxxxxxxxxxx;
seanpaul@xxxxxxxxxxxx; daniel@xxxxxxxx; chris@xxxxxxxxxxxxxxxxxx;
jani.nikula@xxxxxxxxxxxxxxx; Winkler, Tomas <tomas.winkler@xxxxxxxxx>;
Usyskin, Alexander <alexander.usyskin@xxxxxxxxx>
Cc: Vivi, Rodrigo <rodrigo.vivi@xxxxxxxxx>
Subject: [PATCH v3 35/40] 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.
Signed-off-by: Ramalingam C <ramalingam.c@xxxxxxxxx>
---
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 4a9f5a690528..f92c0326fff5 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -4468,7 +4468,7 @@ 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 2f14756b4b0e..8e60ccd0d368 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -1932,8 +1932,8 @@ 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);
+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 5707830a4617..8cf0eeb4b3f8 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);
static inline
bool panel_supports_hdcp(struct intel_connector *connector) @@ -79,6 +80,26
@@ static inline bool intel_hdcp2_capable(struct intel_connector *connector)
panel_supports_hdcp2(connector));
}
+static inline bool intel_hdcp_in_force(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_force(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) { @@ -
858,7 +879,7 @@ 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;
@@ -1734,3 +1755,11 @@ static int intel_hdcp2_init(struct intel_connector
*connector)
hdcp->hdcp2_supported = false;
return ret;
}
+
+void intel_hdcp_handle_cp_irq(struct intel_connector *connector) {
+ if (intel_hdcp_in_force(connector))
+ intel_hdcp_check_link(connector);
+ else if (intel_hdcp2_in_force(connector))
+ intel_hdcp2_check_link(connector);
I don't think this is defined yet ?
27/40-th patch implements it.
Ram
+}
--
2.7.4
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