1 /* SPDX-License-Identifier: GPL-2.0-only */ 1
2 /*
3 * cec-notifier.h - notify CEC drivers of phys
4 *
5 * Copyright 2016 Russell King.
6 * Copyright 2016-2017 Cisco Systems, Inc. and
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_ENABLE
21
22 /**
23 * cec_notifier_conn_register - find or create
24 * HDMI device and connector tuple.
25 * @hdmi_dev: HDMI device that sends the event
26 * @port_name: the connector name from which t
27 * if there is always only one HDMI connector
28 * @conn_info: the connector info from which t
29 *
30 * If a notifier for device @dev and connector
31 * increase the refcount and return that notif
32 *
33 * If it doesn't exist, then allocate a new no
34 * pointer to that new struct.
35 *
36 * Return NULL if the memory could not be allo
37 */
38 struct cec_notifier *
39 cec_notifier_conn_register(struct device *hdmi
40 const struct cec_co
41
42 /**
43 * cec_notifier_conn_unregister - decrease ref
44 * refcount reaches 0.
45 * @n: notifier. If NULL, then this function d
46 */
47 void cec_notifier_conn_unregister(struct cec_n
48
49 /**
50 * cec_notifier_cec_adap_register - find or cr
51 * given device.
52 * @hdmi_dev: HDMI device that sends the event
53 * @port_name: the connector name from which t
54 * if there is always only one HDMI connector
55 * @adap: the cec adapter that registered this
56 *
57 * If a notifier for device @dev and connector
58 * increase the refcount and return that notif
59 *
60 * If it doesn't exist, then allocate a new no
61 * pointer to that new struct.
62 *
63 * Return NULL if the memory could not be allo
64 */
65 struct cec_notifier *
66 cec_notifier_cec_adap_register(struct device *
67 struct cec_adap
68
69 /**
70 * cec_notifier_cec_adap_unregister - decrease
71 * refcount reaches 0.
72 * @n: notifier. If NULL, then this function d
73 * @adap: the cec adapter that registered this
74 */
75 void cec_notifier_cec_adap_unregister(struct c
76 struct c
77
78 /**
79 * cec_notifier_set_phys_addr - set a new phys
80 * @n: the CEC notifier
81 * @pa: the CEC physical address
82 *
83 * Set a new CEC physical address.
84 * Does nothing if @n == NULL.
85 */
86 void cec_notifier_set_phys_addr(struct cec_not
87
88 /**
89 * cec_notifier_set_phys_addr_from_edid - set
90 * @n: the CEC notifier
91 * @edid: the struct edid pointer
92 *
93 * Parses the EDID to obtain the new CEC physi
94 * Does nothing if @n == NULL.
95 */
96 void cec_notifier_set_phys_addr_from_edid(stru
97 cons
98
99 /**
100 * cec_notifier_parse_hdmi_phandle - find the
101 * @dev: the device with the "hdmi-phandle" de
102 *
103 * Returns the device pointer referenced by th
104 * Note that the refcount of the returned devi
105 * This device pointer is only used as a key v
106 * list, but it is never accessed by the CEC d
107 */
108 struct device *cec_notifier_parse_hdmi_phandle
109
110 #else
111
112 static inline struct cec_notifier *
113 cec_notifier_conn_register(struct device *hdmi
114 const struct cec_co
115 {
116 /* A non-NULL pointer is expected on s
117 return (struct cec_notifier *)0xdeadfe
118 }
119
120 static inline void cec_notifier_conn_unregiste
121 {
122 }
123
124 static inline struct cec_notifier *
125 cec_notifier_cec_adap_register(struct device *
126 struct cec_adap
127 {
128 /* A non-NULL pointer is expected on s
129 return (struct cec_notifier *)0xdeadfe
130 }
131
132 static inline void cec_notifier_cec_adap_unreg
133
134 {
135 }
136
137 static inline void cec_notifier_set_phys_addr(
138 {
139 }
140
141 static inline void cec_notifier_set_phys_addr_
142
143 {
144 }
145
146 static inline struct device *cec_notifier_pars
147 {
148 return ERR_PTR(-ENODEV);
149 }
150
151 #endif
152
153 /**
154 * cec_notifier_phys_addr_invalidate() - set t
155 *
156 * @n: the CEC notifier
157 *
158 * This is a simple helper function to invalid
159 * address. Does nothing if @n == NULL.
160 */
161 static inline void cec_notifier_phys_addr_inva
162 {
163 cec_notifier_set_phys_addr(n, CEC_PHYS
164 }
165
166 #endif
167
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