LCOV - code coverage report
Current view: top level - include/media - cec-notifier.h (source / functions) Hit Total Coverage
Test: combined.info Lines: 0 6 0.0 %
Date: 2022-04-01 14:58:12 Functions: 0 0 -
Branches: 0 0 -

           Branch data     Line data    Source code
       1                 :            : /* SPDX-License-Identifier: GPL-2.0-only */
       2                 :            : /*
       3                 :            :  * cec-notifier.h - notify CEC drivers of physical address changes
       4                 :            :  *
       5                 :            :  * Copyright 2016 Russell King <rmk+kernel@arm.linux.org.uk>
       6                 :            :  * Copyright 2016-2017 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
       7                 :            :  */
       8                 :            : 
       9                 :            : #ifndef LINUX_CEC_NOTIFIER_H
      10                 :            : #define LINUX_CEC_NOTIFIER_H
      11                 :            : 
      12                 :            : #include <linux/err.h>
      13                 :            : #include <media/cec.h>
      14                 :            : 
      15                 :            : struct device;
      16                 :            : struct edid;
      17                 :            : struct cec_adapter;
      18                 :            : struct cec_notifier;
      19                 :            : 
      20                 :            : #if IS_REACHABLE(CONFIG_CEC_CORE) && IS_ENABLED(CONFIG_CEC_NOTIFIER)
      21                 :            : 
      22                 :            : /**
      23                 :            :  * cec_notifier_get_conn - find or create a new cec_notifier for the given
      24                 :            :  * device and connector tuple.
      25                 :            :  * @dev: device that sends the events.
      26                 :            :  * @conn: the connector name from which the event occurs
      27                 :            :  *
      28                 :            :  * If a notifier for device @dev already exists, then increase the refcount
      29                 :            :  * and return that notifier.
      30                 :            :  *
      31                 :            :  * If it doesn't exist, then allocate a new notifier struct and return a
      32                 :            :  * pointer to that new struct.
      33                 :            :  *
      34                 :            :  * Return NULL if the memory could not be allocated.
      35                 :            :  */
      36                 :            : struct cec_notifier *cec_notifier_get_conn(struct device *dev,
      37                 :            :                                            const char *conn);
      38                 :            : 
      39                 :            : /**
      40                 :            :  * cec_notifier_conn_register - find or create a new cec_notifier for the given
      41                 :            :  * HDMI device and connector tuple.
      42                 :            :  * @hdmi_dev: HDMI device that sends the events.
      43                 :            :  * @conn_name: the connector name from which the event occurs. May be NULL
      44                 :            :  * if there is always only one HDMI connector created by the HDMI device.
      45                 :            :  * @conn_info: the connector info from which the event occurs (may be NULL)
      46                 :            :  *
      47                 :            :  * If a notifier for device @dev and connector @conn_name already exists, then
      48                 :            :  * increase the refcount and return that notifier.
      49                 :            :  *
      50                 :            :  * If it doesn't exist, then allocate a new notifier struct and return a
      51                 :            :  * pointer to that new struct.
      52                 :            :  *
      53                 :            :  * Return NULL if the memory could not be allocated.
      54                 :            :  */
      55                 :            : struct cec_notifier *
      56                 :            : cec_notifier_conn_register(struct device *hdmi_dev, const char *conn_name,
      57                 :            :                            const struct cec_connector_info *conn_info);
      58                 :            : 
      59                 :            : /**
      60                 :            :  * cec_notifier_conn_unregister - decrease refcount and delete when the
      61                 :            :  * refcount reaches 0.
      62                 :            :  * @n: notifier. If NULL, then this function does nothing.
      63                 :            :  */
      64                 :            : void cec_notifier_conn_unregister(struct cec_notifier *n);
      65                 :            : 
      66                 :            : /**
      67                 :            :  * cec_notifier_cec_adap_register - find or create a new cec_notifier for the
      68                 :            :  * given device.
      69                 :            :  * @hdmi_dev: HDMI device that sends the events.
      70                 :            :  * @conn_name: the connector name from which the event occurs. May be NULL
      71                 :            :  * if there is always only one HDMI connector created by the HDMI device.
      72                 :            :  * @adap: the cec adapter that registered this notifier.
      73                 :            :  *
      74                 :            :  * If a notifier for device @dev and connector @conn_name already exists, then
      75                 :            :  * increase the refcount and return that notifier.
      76                 :            :  *
      77                 :            :  * If it doesn't exist, then allocate a new notifier struct and return a
      78                 :            :  * pointer to that new struct.
      79                 :            :  *
      80                 :            :  * Return NULL if the memory could not be allocated.
      81                 :            :  */
      82                 :            : struct cec_notifier *
      83                 :            : cec_notifier_cec_adap_register(struct device *hdmi_dev, const char *conn_name,
      84                 :            :                                struct cec_adapter *adap);
      85                 :            : 
      86                 :            : /**
      87                 :            :  * cec_notifier_cec_adap_unregister - decrease refcount and delete when the
      88                 :            :  * refcount reaches 0.
      89                 :            :  * @n: notifier. If NULL, then this function does nothing.
      90                 :            :  * @adap: the cec adapter that registered this notifier.
      91                 :            :  */
      92                 :            : void cec_notifier_cec_adap_unregister(struct cec_notifier *n,
      93                 :            :                                       struct cec_adapter *adap);
      94                 :            : 
      95                 :            : /**
      96                 :            :  * cec_notifier_set_phys_addr - set a new physical address.
      97                 :            :  * @n: the CEC notifier
      98                 :            :  * @pa: the CEC physical address
      99                 :            :  *
     100                 :            :  * Set a new CEC physical address.
     101                 :            :  * Does nothing if @n == NULL.
     102                 :            :  */
     103                 :            : void cec_notifier_set_phys_addr(struct cec_notifier *n, u16 pa);
     104                 :            : 
     105                 :            : /**
     106                 :            :  * cec_notifier_set_phys_addr_from_edid - set parse the PA from the EDID.
     107                 :            :  * @n: the CEC notifier
     108                 :            :  * @edid: the struct edid pointer
     109                 :            :  *
     110                 :            :  * Parses the EDID to obtain the new CEC physical address and set it.
     111                 :            :  * Does nothing if @n == NULL.
     112                 :            :  */
     113                 :            : void cec_notifier_set_phys_addr_from_edid(struct cec_notifier *n,
     114                 :            :                                           const struct edid *edid);
     115                 :            : 
     116                 :            : /**
     117                 :            :  * cec_notifier_parse_hdmi_phandle - find the hdmi device from "hdmi-phandle"
     118                 :            :  * @dev: the device with the "hdmi-phandle" device tree property
     119                 :            :  *
     120                 :            :  * Returns the device pointer referenced by the "hdmi-phandle" property.
     121                 :            :  * Note that the refcount of the returned device is not incremented.
     122                 :            :  * This device pointer is only used as a key value in the notifier
     123                 :            :  * list, but it is never accessed by the CEC driver.
     124                 :            :  */
     125                 :            : struct device *cec_notifier_parse_hdmi_phandle(struct device *dev);
     126                 :            : 
     127                 :            : #else
     128                 :            : static inline struct cec_notifier *cec_notifier_get_conn(struct device *dev,
     129                 :            :                                                          const char *conn)
     130                 :            : {
     131                 :            :         /* A non-NULL pointer is expected on success */
     132                 :            :         return (struct cec_notifier *)0xdeadfeed;
     133                 :            : }
     134                 :            : 
     135                 :            : static inline struct cec_notifier *
     136                 :          0 : cec_notifier_conn_register(struct device *hdmi_dev, const char *conn_name,
     137                 :            :                            const struct cec_connector_info *conn_info)
     138                 :            : {
     139                 :            :         /* A non-NULL pointer is expected on success */
     140                 :          0 :         return (struct cec_notifier *)0xdeadfeed;
     141                 :            : }
     142                 :            : 
     143                 :          0 : static inline void cec_notifier_conn_unregister(struct cec_notifier *n)
     144                 :            : {
     145                 :          0 : }
     146                 :            : 
     147                 :            : static inline struct cec_notifier *
     148                 :            : cec_notifier_cec_adap_register(struct device *hdmi_dev, const char *conn_name,
     149                 :            :                                struct cec_adapter *adap)
     150                 :            : {
     151                 :            :         /* A non-NULL pointer is expected on success */
     152                 :            :         return (struct cec_notifier *)0xdeadfeed;
     153                 :            : }
     154                 :            : 
     155                 :            : static inline void cec_notifier_cec_adap_unregister(struct cec_notifier *n,
     156                 :            :                                                     struct cec_adapter *adap)
     157                 :            : {
     158                 :            : }
     159                 :            : 
     160                 :            : static inline void cec_notifier_set_phys_addr(struct cec_notifier *n, u16 pa)
     161                 :            : {
     162                 :            : }
     163                 :            : 
     164                 :          0 : static inline void cec_notifier_set_phys_addr_from_edid(struct cec_notifier *n,
     165                 :            :                                                         const struct edid *edid)
     166                 :            : {
     167                 :          0 : }
     168                 :            : 
     169                 :            : static inline struct device *cec_notifier_parse_hdmi_phandle(struct device *dev)
     170                 :            : {
     171                 :            :         return ERR_PTR(-ENODEV);
     172                 :            : }
     173                 :            : 
     174                 :            : #endif
     175                 :            : 
     176                 :            : /**
     177                 :            :  * cec_notifier_phys_addr_invalidate() - set the physical address to INVALID
     178                 :            :  *
     179                 :            :  * @n: the CEC notifier
     180                 :            :  *
     181                 :            :  * This is a simple helper function to invalidate the physical
     182                 :            :  * address. Does nothing if @n == NULL.
     183                 :            :  */
     184                 :            : static inline void cec_notifier_phys_addr_invalidate(struct cec_notifier *n)
     185                 :            : {
     186                 :            :         cec_notifier_set_phys_addr(n, CEC_PHYS_ADDR_INVALID);
     187                 :            : }
     188                 :            : 
     189                 :            : #endif

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