dc_sink.c

  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(&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(sink->dc_container_id);
 69	kfree(sink);
 70}
 71
 72void dc_sink_release(struct dc_sink *sink)
 73{
 74	kref_put(&sink->refcount, 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(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
 91construct_fail:
 92	kfree(sink);
 93
 94alloc_fail:
 95	return NULL;
 96}
 97
 98/*******************************************************************************
 99 * Protected functions - visible only inside of DC (not visible in DM)
100 ******************************************************************************/