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_hdcp.c | |
| parent | 6fe2ce064936efe5fbf2ce62c0b9be790d75189f (diff) | |
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_hdcp.c')
| -rw-r--r-- | drivers/gpu/drm/drm_hdcp.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_hdcp.c b/drivers/gpu/drm/drm_hdcp.c index ce235fd1c844..77433ee3d652 100644 --- a/drivers/gpu/drm/drm_hdcp.c +++ b/drivers/gpu/drm/drm_hdcp.c @@ -374,6 +374,10 @@ DRM_ENUM_NAME_FN(drm_get_hdcp_content_type_name, * * The content protection will be set to &drm_connector_state.content_protection * + * When kernel triggered content protection state change like DESIRED->ENABLED + * and ENABLED->DESIRED, will use drm_hdcp_update_content_protection() to update + * the content protection state of a connector. + * * Returns: * Zero on success, negative errno on failure. */ @@ -414,3 +418,33 @@ int drm_connector_attach_content_protection_property( return 0; } EXPORT_SYMBOL(drm_connector_attach_content_protection_property); + +/** + * drm_hdcp_update_content_protection - Updates the content protection state + * of a connector + * + * @connector: drm_connector on which content protection state needs an update + * @val: New state of the content protection property + * + * This function can be used by display drivers, to update the kernel triggered + * content protection state changes of a drm_connector such as DESIRED->ENABLED + * and ENABLED->DESIRED. No uevent for DESIRED->UNDESIRED or ENABLED->UNDESIRED, + * as userspace is triggering such state change and kernel performs it without + * fail.This function update the new state of the property into the connector's + * state and generate an uevent to notify the userspace. + */ +void drm_hdcp_update_content_protection(struct drm_connector *connector, + u64 val) +{ + struct drm_device *dev = connector->dev; + struct drm_connector_state *state = connector->state; + + WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex)); + if (state->content_protection == val) + return; + + state->content_protection = val; + drm_sysfs_connector_status_event(connector, + dev->mode_config.content_protection_property); +} +EXPORT_SYMBOL(drm_hdcp_update_content_protection); |