diff options
| author | Ramalingam C <ramalingam.c@intel.com> | 2019-08-01 17:11:17 +0530 |
|---|---|---|
| committer | Ramalingam C <ramalingam.c@intel.com> | 2019-08-06 13:17:23 +0530 |
| commit | bb5a45d40d50163df275c5a9578e19acdac361a2 (patch) | |
| tree | f30f1756d12dacc8028dc92531824e615c98d74b /drivers/gpu/drm/drm_connector.c | |
| parent | 6fe2ce064936efe5fbf2ce62c0b9be790d75189f (diff) | |
| download | lwn-bb5a45d40d50163df275c5a9578e19acdac361a2.tar.gz lwn-bb5a45d40d50163df275c5a9578e19acdac361a2.zip | |
drm/hdcp: update content protection property with uevent
drm function is defined and exported to update a connector's
content protection property state and to generate a uevent along
with it.
Pekka have completed the Weston DRM-backend review in
https://gitlab.freedesktop.org/wayland/weston/merge_requests/48
and the UAPI for HDCP 2.2 looks good.
The userspace is accepted in Weston.
v2:
Update only when state is different from old one.
v3:
KDoc is added [Daniel]
v4:
KDoc is extended bit more [pekka]
v5:
Uevent usage is documented at kdoc of "Content Protection" also
[pekka]
Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Acked-by: Pekka Paalanen <pekka.paalanen@collabora.com>
Acked-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/320963/?series=57232&rev=14
Diffstat (limited to 'drivers/gpu/drm/drm_connector.c')
| -rw-r--r-- | drivers/gpu/drm/drm_connector.c | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c index cddb97f75415..354798bad576 100644 --- a/drivers/gpu/drm/drm_connector.c +++ b/drivers/gpu/drm/drm_connector.c @@ -983,10 +983,19 @@ static const struct drm_prop_enum_list hdmi_colorspaces[] = { * - If the state is DESIRED, kernel should attempt to re-authenticate the * link whenever possible. This includes across disable/enable, dpms, * hotplug, downstream device changes, link status failures, etc.. - * - Userspace is responsible for polling the property to determine when - * the value transitions from ENABLED to DESIRED. This signifies the link - * is no longer protected and userspace should take appropriate action - * (whatever that might be). + * - Kernel sends uevent with the connector id and property id through + * @drm_hdcp_update_content_protection, upon below kernel triggered + * scenarios: + * DESIRED -> ENABLED (authentication success) + * ENABLED -> DESIRED (termination of authentication) + * - Please note no uevents for userspace triggered property state changes, + * which can't fail such as + * DESIRED/ENABLED -> UNDESIRED + * UNDESIRED -> DESIRED + * - Userspace is responsible for polling the property or listen to uevents + * to determine when the value transitions from ENABLED to DESIRED. + * This signifies the link is no longer protected and userspace should + * take appropriate action (whatever that might be). * * HDCP Content Type: * This Enum property is used by the userspace to declare the content type |