LXR linux/drivers/gpu/drm/amd/display/dc/core/dc

   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 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
  42static 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
  68void dc_sink_retain(struct dc_sink *sink)
  69{
  70        kref_get(&sink->refcount);
  71}
  72
  73static 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
  80void dc_sink_release(struct dc_sink *sink)
  81{
  82        kref_put(&sink->refcount, dc_sink_free);
  83}
  84
  85struct 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
  99construct_fail:
 100        kfree(sink);
 101
 102alloc_fail:
 103        return NULL;
 104}
 105
 106/*******************************************************************************
 107 * Protected functions - visible only inside of DC (not visible in DM)
 108 ******************************************************************************/
 109