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 
dc_sink_construct(struct dc_sink * sink,const struct dc_sink_init_data * init_params)34 static bool dc_sink_construct(struct dc_sink *sink, const struct dc_sink_init_data *init_params)
35 {
36 
37 	struct dc_link *link = init_params->link;
38 
39 	if (!link)
40 		return false;
41 
42 	sink->sink_signal = init_params->sink_signal;
43 	sink->link = link;
44 	sink->ctx = link->ctx;
45 	sink->dongle_max_pix_clk = init_params->dongle_max_pix_clk;
46 	sink->converter_disable_audio = init_params->converter_disable_audio;
47 	sink->dc_container_id = NULL;
48 	sink->sink_id = init_params->link->ctx->dc_sink_id_count;
49 	// increment dc_sink_id_count because we don't want two sinks with same ID
50 	// unless they are actually the same
51 	init_params->link->ctx->dc_sink_id_count++;
52 
53 	return true;
54 }
55 
56 /*******************************************************************************
57  * Public functions
58  ******************************************************************************/
59 
dc_sink_retain(struct dc_sink * sink)60 void dc_sink_retain(struct dc_sink *sink)
61 {
62 	kref_get(&sink->refcount);
63 }
64 
dc_sink_free(struct kref * kref)65 static void dc_sink_free(struct kref *kref)
66 {
67 	struct dc_sink *sink = container_of(kref, struct dc_sink, refcount);
68 	kfree(sink->dc_container_id);
69 	kfree(sink);
70 }
71 
dc_sink_release(struct dc_sink * sink)72 void dc_sink_release(struct dc_sink *sink)
73 {
74 	kref_put(&sink->refcount, dc_sink_free);
75 }
76 
dc_sink_create(const struct dc_sink_init_data * init_params)77 struct dc_sink *dc_sink_create(const struct dc_sink_init_data *init_params)
78 {
79 	struct dc_sink *sink = kzalloc(sizeof(*sink), GFP_KERNEL);
80 
81 	if (NULL == sink)
82 		goto alloc_fail;
83 
84 	if (false == dc_sink_construct(sink, init_params))
85 		goto construct_fail;
86 
87 	kref_init(&sink->refcount);
88 
89 	return sink;
90 
91 construct_fail:
92 	kfree(sink);
93 
94 alloc_fail:
95 	return NULL;
96 }
97 
98 /*******************************************************************************
99  * Protected functions - visible only inside of DC (not visible in DM)
100  ******************************************************************************/
101