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author | 2019-06-20 06:10:00 -0400 | |
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committer | 2019-06-27 07:19:43 -0400 | |
commit | b48cb35c6a7babdc317edb4c752ecf3da0691228 (patch) | |
tree | a61296034a488810fbca3247e131c6c0ebf63a4a /include/media | |
parent | media: cec: add struct cec_connector_info support (diff) | |
download | linux-b48cb35c6a7babdc317edb4c752ecf3da0691228.tar.gz linux-b48cb35c6a7babdc317edb4c752ecf3da0691228.tar.bz2 linux-b48cb35c6a7babdc317edb4c752ecf3da0691228.zip |
media: cec-notifier: add new notifier functions
In order to support multiple CEC devices for an HDMI connector,
and to support cec_connector_info, drivers should use either a
cec_notifier_conn_(un)register pair of functions (HDMI drivers)
or a cec_notifier_cec_adap_(un)register pair (CEC adapter drivers).
This replaces cec_notifier_get_conn/cec_notifier_put.
For CEC adapters it is also no longer needed to call cec_notifier_register,
cec_register_cec_notifier and cec_notifier_unregister. This is now
all handled internally by the new functions.
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Diffstat (limited to 'include/media')
-rw-r--r-- | include/media/cec-notifier.h | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/include/media/cec-notifier.h b/include/media/cec-notifier.h index 0e3bd3415724..f161f8a493ac 100644 --- a/include/media/cec-notifier.h +++ b/include/media/cec-notifier.h @@ -43,6 +43,60 @@ struct cec_notifier *cec_notifier_get_conn(struct device *dev, void cec_notifier_put(struct cec_notifier *n); /** + * cec_notifier_conn_register - find or create a new cec_notifier for the given + * HDMI device and connector tuple. + * @hdmi_dev: HDMI device that sends the events. + * @conn_name: the connector name from which the event occurs. May be NULL + * if there is always only one HDMI connector created by the HDMI device. + * @conn_info: the connector info from which the event occurs (may be NULL) + * + * If a notifier for device @dev and connector @conn_name already exists, then + * increase the refcount and return that notifier. + * + * If it doesn't exist, then allocate a new notifier struct and return a + * pointer to that new struct. + * + * Return NULL if the memory could not be allocated. + */ +struct cec_notifier * +cec_notifier_conn_register(struct device *hdmi_dev, const char *conn_name, + const struct cec_connector_info *conn_info); + +/** + * cec_notifier_conn_unregister - decrease refcount and delete when the + * refcount reaches 0. + * @n: notifier. If NULL, then this function does nothing. + */ +void cec_notifier_conn_unregister(struct cec_notifier *n); + +/** + * cec_notifier_cec_adap_register - find or create a new cec_notifier for the + * given device. + * @hdmi_dev: HDMI device that sends the events. + * @conn_name: the connector name from which the event occurs. May be NULL + * if there is always only one HDMI connector created by the HDMI device. + * @adap: the cec adapter that registered this notifier. + * + * If a notifier for device @dev and connector @conn_name already exists, then + * increase the refcount and return that notifier. + * + * If it doesn't exist, then allocate a new notifier struct and return a + * pointer to that new struct. + * + * Return NULL if the memory could not be allocated. + */ +struct cec_notifier * +cec_notifier_cec_adap_register(struct device *hdmi_dev, const char *conn_name, + struct cec_adapter *adap); + +/** + * cec_notifier_cec_adap_unregister - decrease refcount and delete when the + * refcount reaches 0. + * @n: notifier. If NULL, then this function does nothing. + */ +void cec_notifier_cec_adap_unregister(struct cec_notifier *n); + +/** * cec_notifier_set_phys_addr - set a new physical address. * @n: the CEC notifier * @pa: the CEC physical address @@ -86,6 +140,30 @@ static inline void cec_notifier_put(struct cec_notifier *n) { } +static inline struct cec_notifier * +cec_notifier_conn_register(struct device *hdmi_dev, const char *conn_name, + const struct cec_connector_info *conn_info) +{ + /* A non-NULL pointer is expected on success */ + return (struct cec_notifier *)0xdeadfeed; +} + +static inline void cec_notifier_conn_unregister(struct cec_notifier *n) +{ +} + +static inline struct cec_notifier * +cec_notifier_cec_adap_register(struct device *hdmi_dev, const char *conn_name, + struct cec_adapter *adap) +{ + /* A non-NULL pointer is expected on success */ + return (struct cec_notifier *)0xdeadfeed; +} + +static inline void cec_notifier_cec_adap_unregister(struct cec_notifier *n) +{ +} + static inline void cec_notifier_set_phys_addr(struct cec_notifier *n, u16 pa) { } |