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 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 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 68 void dc_sink_retain(struct dc_sink *sink) 69 { 70 kref_get(&sink->refcount); 71 } 72 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 80 void dc_sink_release(struct dc_sink *sink) 81 { 82 kref_put(&sink->refcount, dc_sink_free); 83 } 84 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