diff options
| -rw-r--r-- | drivers/gpu/drm/drm_atomic.c | 8 | ||||
| -rw-r--r-- | drivers/gpu/drm/drm_connector.c | 78 | ||||
| -rw-r--r-- | include/drm/drm_connector.h | 16 | ||||
| -rw-r--r-- | include/uapi/drm/drm_mode.h | 4 |
4 files changed, 106 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c index b76d49218cf1..69ff763a834e 100644 --- a/drivers/gpu/drm/drm_atomic.c +++ b/drivers/gpu/drm/drm_atomic.c @@ -1224,6 +1224,12 @@ static int drm_atomic_connector_set_property(struct drm_connector *connector, state->picture_aspect_ratio = val; } else if (property == connector->scaling_mode_property) { state->scaling_mode = val; + } else if (property == connector->content_protection_property) { + if (val == DRM_MODE_CONTENT_PROTECTION_ENABLED) { + DRM_DEBUG_KMS("only drivers can set CP Enabled\n"); + return -EINVAL; + } + state->content_protection = val; } else if (connector->funcs->atomic_set_property) { return connector->funcs->atomic_set_property(connector, state, property, val); @@ -1303,6 +1309,8 @@ drm_atomic_connector_get_property(struct drm_connector *connector, *val = state->picture_aspect_ratio; } else if (property == connector->scaling_mode_property) { *val = state->scaling_mode; + } else if (property == connector->content_protection_property) { + *val = state->content_protection; } else if (connector->funcs->atomic_get_property) { return connector->funcs->atomic_get_property(connector, state, property, val); diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c index 2559c615d984..b85a7749709d 100644 --- a/drivers/gpu/drm/drm_connector.c +++ b/drivers/gpu/drm/drm_connector.c @@ -756,6 +756,13 @@ static const struct drm_prop_enum_list drm_tv_subconnector_enum_list[] = { DRM_ENUM_NAME_FN(drm_get_tv_subconnector_name, drm_tv_subconnector_enum_list) +static struct drm_prop_enum_list drm_cp_enum_list[] = { + { DRM_MODE_CONTENT_PROTECTION_UNDESIRED, "Undesired" }, + { DRM_MODE_CONTENT_PROTECTION_DESIRED, "Desired" }, + { DRM_MODE_CONTENT_PROTECTION_ENABLED, "Enabled" }, +}; +DRM_ENUM_NAME_FN(drm_get_content_protection_name, drm_cp_enum_list) + /** * DOC: standard connector properties * @@ -826,6 +833,41 @@ DRM_ENUM_NAME_FN(drm_get_tv_subconnector_name, * Indicates the output should be ignored for purposes of displaying a * standard desktop environment or console. This is most likely because * the output device is not rectilinear. + * Content Protection: + * This property is used by userspace to request the kernel protect future + * content communicated over the link. When requested, kernel will apply + * the appropriate means of protection (most often HDCP), and use the + * property to tell userspace the protection is active. + * + * Drivers can set this up by calling + * drm_connector_attach_content_protection_property() on initialization. + * + * The value of this property can be one of the following: + * + * - DRM_MODE_CONTENT_PROTECTION_UNDESIRED = 0 + * The link is not protected, content is transmitted in the clear. + * - DRM_MODE_CONTENT_PROTECTION_DESIRED = 1 + * Userspace has requested content protection, but the link is not + * currently protected. When in this state, kernel should enable + * Content Protection as soon as possible. + * - DRM_MODE_CONTENT_PROTECTION_ENABLED = 2 + * Userspace has requested content protection, and the link is + * protected. Only the driver can set the property to this value. + * If userspace attempts to set to ENABLED, kernel will return + * -EINVAL. + * + * A few guidelines: + * + * - DESIRED state should be preserved until userspace de-asserts it by + * setting the property to UNDESIRED. This means ENABLED should only + * transition to UNDESIRED when the user explicitly requests it. + * - 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). * * Connectors also have one standardized atomic property: * @@ -1127,6 +1169,42 @@ int drm_connector_attach_scaling_mode_property(struct drm_connector *connector, EXPORT_SYMBOL(drm_connector_attach_scaling_mode_property); /** + * drm_connector_attach_content_protection_property - attach content protection + * property + * + * @connector: connector to attach CP property on. + * + * This is used to add support for content protection on select connectors. + * Content Protection is intentionally vague to allow for different underlying + * technologies, however it is most implemented by HDCP. + * + * The content protection will be set to &drm_connector_state.content_protection + * + * Returns: + * Zero on success, negative errno on failure. + */ +int drm_connector_attach_content_protection_property( + struct drm_connector *connector) +{ + struct drm_device *dev = connector->dev; + struct drm_property *prop; + + prop = drm_property_create_enum(dev, 0, "Content Protection", + drm_cp_enum_list, + ARRAY_SIZE(drm_cp_enum_list)); + if (!prop) + return -ENOMEM; + + drm_object_attach_property(&connector->base, prop, + DRM_MODE_CONTENT_PROTECTION_UNDESIRED); + + connector->content_protection_property = prop; + + return 0; +} +EXPORT_SYMBOL(drm_connector_attach_content_protection_property); + +/** * drm_mode_create_aspect_ratio_property - create aspect ratio property * @dev: DRM device * diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h index ed38df4ac204..758a176e7b57 100644 --- a/include/drm/drm_connector.h +++ b/include/drm/drm_connector.h @@ -419,6 +419,12 @@ struct drm_connector_state { * upscaling, mostly used for built-in panels. */ unsigned int scaling_mode; + + /** + * @content_protection: Connector property to request content + * protection. This is most commonly used for HDCP. + */ + unsigned int content_protection; }; /** @@ -766,6 +772,7 @@ struct drm_cmdline_mode { * @tile_h_size: horizontal size of this tile. * @tile_v_size: vertical size of this tile. * @scaling_mode_property: Optional atomic property to control the upscaling. + * @content_protection_property: Optional property to control content protection * * Each connector may be connected to one or more CRTCs, or may be clonable by * another connector if they can share a CRTC. Each connector also has a specific @@ -857,6 +864,12 @@ struct drm_connector { struct drm_property *scaling_mode_property; /** + * @content_protection_property: DRM ENUM property for content + * protection + */ + struct drm_property *content_protection_property; + + /** * @path_blob_ptr: * * DRM blob property data for the DP MST path property. @@ -1065,6 +1078,7 @@ const char *drm_get_dvi_i_subconnector_name(int val); const char *drm_get_dvi_i_select_name(int val); const char *drm_get_tv_subconnector_name(int val); const char *drm_get_tv_select_name(int val); +const char *drm_get_content_protection_name(int val); int drm_mode_create_dvi_i_properties(struct drm_device *dev); int drm_mode_create_tv_properties(struct drm_device *dev, @@ -1073,6 +1087,8 @@ int drm_mode_create_tv_properties(struct drm_device *dev, int drm_mode_create_scaling_mode_property(struct drm_device *dev); int drm_connector_attach_scaling_mode_property(struct drm_connector *connector, u32 scaling_mode_mask); +int drm_connector_attach_content_protection_property( + struct drm_connector *connector); int drm_mode_create_aspect_ratio_property(struct drm_device *dev); int drm_mode_create_suggested_offset_properties(struct drm_device *dev); diff --git a/include/uapi/drm/drm_mode.h b/include/uapi/drm/drm_mode.h index 5597a87154e5..d1a69ff24fe8 100644 --- a/include/uapi/drm/drm_mode.h +++ b/include/uapi/drm/drm_mode.h @@ -173,6 +173,10 @@ extern "C" { DRM_MODE_REFLECT_X | \ DRM_MODE_REFLECT_Y) +/* Content Protection Flags */ +#define DRM_MODE_CONTENT_PROTECTION_UNDESIRED 0 +#define DRM_MODE_CONTENT_PROTECTION_DESIRED 1 +#define DRM_MODE_CONTENT_PROTECTION_ENABLED 2 struct drm_mode_modeinfo { __u32 clock; |