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 <linux/slab.h> 27 28 #include "dm_services.h" 29 #include "dm_helpers.h" 30 #include "core_types.h" 31 32 /******************************************************************************* 33 * Private functions 34 ******************************************************************************/ 35 36 static void destruct(struct dc_sink *sink) 37 { 38 if (sink->dc_container_id) { 39 kfree(sink->dc_container_id); 40 sink->dc_container_id = NULL; 41 } 42 } 43 44 static bool construct(struct dc_sink *sink, const struct dc_sink_init_data *init_params) 45 { 46 47 struct dc_link *link = init_params->link; 48 49 if (!link) 50 return false; 51 52 sink->sink_signal = init_params->sink_signal; 53 sink->link = link; 54 sink->ctx = link->ctx; 55 sink->dongle_max_pix_clk = init_params->dongle_max_pix_clk; 56 sink->converter_disable_audio = init_params->converter_disable_audio; 57 sink->dc_container_id = NULL; 58 sink->sink_id = init_params->link->ctx->dc_sink_id_count; 59 // increment dc_sink_id_count because we don't want two sinks with same ID 60 // unless they are actually the same 61 init_params->link->ctx->dc_sink_id_count++; 62 63 return true; 64 } 65 66 /******************************************************************************* 67 * Public functions 68 ******************************************************************************/ 69 70 void dc_sink_retain(struct dc_sink *sink) 71 { 72 kref_get(&sink->refcount); 73 } 74 75 static void dc_sink_free(struct kref *kref) 76 { 77 struct dc_sink *sink = container_of(kref, struct dc_sink, refcount); 78 destruct(sink); 79 kfree(sink); 80 } 81 82 void dc_sink_release(struct dc_sink *sink) 83 { 84 kref_put(&sink->refcount, dc_sink_free); 85 } 86 87 struct dc_sink *dc_sink_create(const struct dc_sink_init_data *init_params) 88 { 89 struct dc_sink *sink = kzalloc(sizeof(*sink), GFP_KERNEL); 90 91 if (NULL == sink) 92 goto alloc_fail; 93 94 if (false == construct(sink, init_params)) 95 goto construct_fail; 96 97 kref_init(&sink->refcount); 98 99 return sink; 100 101 construct_fail: 102 kfree(sink); 103 104 alloc_fail: 105 return NULL; 106 } 107 108 /******************************************************************************* 109 * Protected functions - visible only inside of DC (not visible in DM) 110 ******************************************************************************/ 111