1 /*
2 * Copyright 2012-15 Advanced Micro Devices, Inc.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
21 *
22 * Authors: AMD
23 *
24 */
25
26 #include "dm_services.h"
27 #include "dm_helpers.h"
28 #include "core_types.h"
29
30 /*******************************************************************************
31 * Private functions
32 ******************************************************************************/
33
destruct(struct dc_sink * sink)34 static void destruct(struct dc_sink *sink)
35 {
36 if (sink->dc_container_id) {
37 kfree(sink->dc_container_id);
38 sink->dc_container_id = NULL;
39 }
40 }
41
construct(struct dc_sink * sink,const struct dc_sink_init_data * init_params)42 static bool construct(struct dc_sink *sink, const struct dc_sink_init_data *init_params)
43 {
44
45 struct dc_link *link = init_params->link;
46
47 if (!link)
48 return false;
49
50 sink->sink_signal = init_params->sink_signal;
51 sink->link = link;
52 sink->ctx = link->ctx;
53 sink->dongle_max_pix_clk = init_params->dongle_max_pix_clk;
54 sink->converter_disable_audio = init_params->converter_disable_audio;
55 sink->dc_container_id = NULL;
56 sink->sink_id = init_params->link->ctx->dc_sink_id_count;
57 // increment dc_sink_id_count because we don't want two sinks with same ID
58 // unless they are actually the same
59 init_params->link->ctx->dc_sink_id_count++;
60
61 return true;
62 }
63
64 /*******************************************************************************
65 * Public functions
66 ******************************************************************************/
67
dc_sink_retain(struct dc_sink * sink)68 void dc_sink_retain(struct dc_sink *sink)
69 {
70 kref_get(&sink->refcount);
71 }
72
dc_sink_free(struct kref * kref)73 static void dc_sink_free(struct kref *kref)
74 {
75 struct dc_sink *sink = container_of(kref, struct dc_sink, refcount);
76 destruct(sink);
77 kfree(sink);
78 }
79
dc_sink_release(struct dc_sink * sink)80 void dc_sink_release(struct dc_sink *sink)
81 {
82 kref_put(&sink->refcount, dc_sink_free);
83 }
84
dc_sink_create(const struct dc_sink_init_data * init_params)85 struct dc_sink *dc_sink_create(const struct dc_sink_init_data *init_params)
86 {
87 struct dc_sink *sink = kzalloc(sizeof(*sink), GFP_KERNEL);
88
89 if (NULL == sink)
90 goto alloc_fail;
91
92 if (false == construct(sink, init_params))
93 goto construct_fail;
94
95 kref_init(&sink->refcount);
96
97 return sink;
98
99 construct_fail:
100 kfree(sink);
101
102 alloc_fail:
103 return NULL;
104 }
105
106 /*******************************************************************************
107 * Protected functions - visible only inside of DC (not visible in DM)
108 ******************************************************************************/
109