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
34static 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
60void dc_sink_retain(struct dc_sink *sink)
61{
62 kref_get(kref: &sink->refcount);
63}
64
65static void dc_sink_free(struct kref *kref)
66{
67 struct dc_sink *sink = container_of(kref, struct dc_sink, refcount);
68 kfree(objp: sink->dc_container_id);
69 kfree(objp: sink);
70}
71
72void dc_sink_release(struct dc_sink *sink)
73{
74 kref_put(kref: &sink->refcount, release: dc_sink_free);
75}
76
77struct dc_sink *dc_sink_create(const struct dc_sink_init_data *init_params)
78{
79 struct dc_sink *sink = kzalloc(size: 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(kref: &sink->refcount);
88
89 return sink;
90
91construct_fail:
92 kfree(objp: sink);
93
94alloc_fail:
95 return NULL;
96}
97
98/*******************************************************************************
99 * Protected functions - visible only inside of DC (not visible in DM)
100 ******************************************************************************/
101

source code of linux/drivers/gpu/drm/amd/display/dc/core/dc_sink.c