[Intel-gfx] [RFC v1 19/20] drm/hdcp2.2: HDCP2.2 enable as a asynchronous work
Ramalingam C
ramalingam.c at intel.com
Wed Jul 12 08:29:03 UTC 2017
HDCP2 Authentication might take more then 5Secs based on the
downstream topology. So when atomic property set ioctl requests
for HDCP enable, We schedule the HDCP2 enbale as a asynchronous
work by not blocking the ioctl call.
The Result of the work will be updated to the DRM Property.
Signed-off-by: Ramalingam C <ramalingam.c at intel.com>
---
drivers/gpu/drm/drm_hdcp.c | 40 +++++++++++++++++++++++++++++++++++++---
include/drm/drm_hdcp.h | 8 ++++++++
2 files changed, 45 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/drm_hdcp.c b/drivers/gpu/drm/drm_hdcp.c
index cb20cc9..9e1b7ae 100644
--- a/drivers/gpu/drm/drm_hdcp.c
+++ b/drivers/gpu/drm/drm_hdcp.c
@@ -69,6 +69,39 @@ static void drm_hdcp_update_change(struct drm_hdcp *hdcp, bool enabled,
}
}
+static void hdcp_2_2_enable_work(struct work_struct *work)
+{
+ struct drm_hdcp *hdcp = container_of(work, struct drm_hdcp,
+ hdcp2_enable_work);
+
+ mutex_lock(&hdcp->mutex);
+
+ /* Marking it as WIP */
+ drm_hdcp_update_change(hdcp, false, DRM_HDCP_WIP, true);
+ hdcp->spec_ver_used = HDCP_2_2_SUPPORT;
+
+ /*
+ * TODO: Implement the HDCP2.2 authentication and Encryption Enable
+ */
+ mutex_unlock(&hdcp->mutex);
+}
+
+static int drm_hdcp_2_2_enable(struct drm_hdcp *hdcp, uint8_t stream_type)
+{
+ mutex_lock(&hdcp->mutex);
+
+ /* Set the stream type */
+ hdcp->streams[0].stream_type = stream_type;
+
+ hdcp->req_state &= ~(DRM_HDCP_ENABLE | DRM_HDCP_TYPE_MASK);
+ hdcp->req_state = DRM_HDCP_ENABLE |
+ (stream_type << DRM_HDCP_TYPE_SHIFT);
+
+ schedule_work(&hdcp->hdcp2_enable_work);
+
+ mutex_unlock(&hdcp->mutex);
+ return 0;
+}
int drm_hdcp_enable(struct drm_connector *connector, uint8_t stream_type)
{
@@ -83,9 +116,8 @@ int drm_hdcp_enable(struct drm_connector *connector, uint8_t stream_type)
return ret;
}
- /*
- * TODO: Invoke the Version specific hdcp_enable
- */
+ if (connector->hdcp_state & DRM_HDCP2_SUPPORTED)
+ return drm_hdcp_2_2_enable(hdcp, stream_type);
return 0;
}
@@ -260,6 +292,8 @@ static inline int drm_hdcp2_init(struct drm_connector *connector,
/* Setting it to Type 0 by default */
hdcp->streams[0].stream_type = HDCP_STREAM_TYPE0_CODE;
+ INIT_WORK(&hdcp->hdcp2_enable_work, hdcp_2_2_enable_work);
+
return 0;
}
diff --git a/include/drm/drm_hdcp.h b/include/drm/drm_hdcp.h
index dac9831..ea18bac 100644
--- a/include/drm/drm_hdcp.h
+++ b/include/drm/drm_hdcp.h
@@ -366,6 +366,12 @@ struct drm_hdcp {
uint32_t ver_support_on_plat;
uint32_t ver_support_on_panel;
+ /*
+ * HDCP ver last used for Enable. Will help to choose the
+ * corresponding Version's disable.
+ */
+ uint32_t spec_ver_used;
+
/* HDCP requested state and also the current state */
uint64_t req_state;
@@ -375,6 +381,8 @@ struct drm_hdcp {
const struct drm_hdcp_funcs *hdcp_funcs;
const struct drm_hdcp2_funcs *hdcp2_funcs;
+ struct work_struct hdcp2_enable_work;
+
struct mutex mutex;
};
--
2.7.4
More information about the Intel-gfx
mailing list