1 /* $NetBSD: amdgpu_dc_sink.c,v 1.2 2021/12/18 23:45:02 riastradh Exp $ */
2
3 /*
4 * Copyright 2012-15 Advanced Micro Devices, Inc.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 *
24 * Authors: AMD
25 *
26 */
27
28 #include <sys/cdefs.h>
29 __KERNEL_RCSID(0, "$NetBSD: amdgpu_dc_sink.c,v 1.2 2021/12/18 23:45:02 riastradh Exp $");
30
31 #include <linux/slab.h>
32
33 #include "dm_services.h"
34 #include "dm_helpers.h"
35 #include "core_types.h"
36
37 /*******************************************************************************
38 * Private functions
39 ******************************************************************************/
40
dc_sink_destruct(struct dc_sink * sink)41 static void dc_sink_destruct(struct dc_sink *sink)
42 {
43 if (sink->dc_container_id) {
44 kfree(sink->dc_container_id);
45 sink->dc_container_id = NULL;
46 }
47 }
48
dc_sink_construct(struct dc_sink * sink,const struct dc_sink_init_data * init_params)49 static bool dc_sink_construct(struct dc_sink *sink, const struct dc_sink_init_data *init_params)
50 {
51
52 struct dc_link *link = init_params->link;
53
54 if (!link)
55 return false;
56
57 sink->sink_signal = init_params->sink_signal;
58 sink->link = link;
59 sink->ctx = link->ctx;
60 sink->dongle_max_pix_clk = init_params->dongle_max_pix_clk;
61 sink->converter_disable_audio = init_params->converter_disable_audio;
62 sink->dc_container_id = NULL;
63 sink->sink_id = init_params->link->ctx->dc_sink_id_count;
64 // increment dc_sink_id_count because we don't want two sinks with same ID
65 // unless they are actually the same
66 init_params->link->ctx->dc_sink_id_count++;
67
68 return true;
69 }
70
71 /*******************************************************************************
72 * Public functions
73 ******************************************************************************/
74
dc_sink_retain(struct dc_sink * sink)75 void dc_sink_retain(struct dc_sink *sink)
76 {
77 kref_get(&sink->refcount);
78 }
79
dc_sink_free(struct kref * kref)80 static void dc_sink_free(struct kref *kref)
81 {
82 struct dc_sink *sink = container_of(kref, struct dc_sink, refcount);
83 dc_sink_destruct(sink);
84 kfree(sink);
85 }
86
dc_sink_release(struct dc_sink * sink)87 void dc_sink_release(struct dc_sink *sink)
88 {
89 kref_put(&sink->refcount, dc_sink_free);
90 }
91
dc_sink_create(const struct dc_sink_init_data * init_params)92 struct dc_sink *dc_sink_create(const struct dc_sink_init_data *init_params)
93 {
94 struct dc_sink *sink = kzalloc(sizeof(*sink), GFP_KERNEL);
95
96 if (NULL == sink)
97 goto alloc_fail;
98
99 if (false == dc_sink_construct(sink, init_params))
100 goto construct_fail;
101
102 kref_init(&sink->refcount);
103
104 return sink;
105
106 construct_fail:
107 kfree(sink);
108
109 alloc_fail:
110 return NULL;
111 }
112
113 /*******************************************************************************
114 * Protected functions - visible only inside of DC (not visible in DM)
115 ******************************************************************************/
116