LXR linux/drivers/gpu/drm/amd/display/dc/virtual/virtual_link

   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_services_types.h"
  30
  31#include "virtual_link_encoder.h"
  32
  33static bool virtual_link_encoder_validate_output_with_stream(
  34        struct link_encoder *enc,
  35        const struct dc_stream_state *stream) { return true; }
  36
  37static void virtual_link_encoder_hw_init(struct link_encoder *enc) {}
  38
  39static void virtual_link_encoder_setup(
  40        struct link_encoder *enc,
  41        enum signal_type signal) {}
  42
  43static void virtual_link_encoder_enable_tmds_output(
  44        struct link_encoder *enc,
  45        enum clock_source_id clock_source,
  46        enum dc_color_depth color_depth,
  47        enum signal_type signal,
  48        uint32_t pixel_clock) {}
  49
  50static void virtual_link_encoder_enable_dp_output(
  51        struct link_encoder *enc,
  52        const struct dc_link_settings *link_settings,
  53        enum clock_source_id clock_source) {}
  54
  55static void virtual_link_encoder_enable_dp_mst_output(
  56        struct link_encoder *enc,
  57        const struct dc_link_settings *link_settings,
  58        enum clock_source_id clock_source) {}
  59
  60static void virtual_link_encoder_disable_output(
  61        struct link_encoder *link_enc,
  62        enum signal_type signal) {}
  63
  64static void virtual_link_encoder_dp_set_lane_settings(
  65        struct link_encoder *enc,
  66        const struct link_training_settings *link_settings) {}
  67
  68static void virtual_link_encoder_dp_set_phy_pattern(
  69        struct link_encoder *enc,
  70        const struct encoder_set_dp_phy_pattern_param *param) {}
  71
  72static void virtual_link_encoder_update_mst_stream_allocation_table(
  73        struct link_encoder *enc,
  74        const struct link_mst_stream_allocation_table *table) {}
  75
  76static void virtual_link_encoder_connect_dig_be_to_fe(
  77        struct link_encoder *enc,
  78        enum engine_id engine,
  79        bool connect) {}
  80
  81static void virtual_link_encoder_destroy(struct link_encoder **enc)
  82{
  83        kfree(*enc);
  84        *enc = NULL;
  85}
  86
  87static void virtual_link_encoder_get_max_link_cap(struct link_encoder *enc,
  88                struct dc_link_settings *link_settings)
  89{
  90        /* Set Default link settings */
  91        struct dc_link_settings max_link_cap = {LANE_COUNT_FOUR, LINK_RATE_HIGH,
  92                                LINK_SPREAD_05_DOWNSPREAD_30KHZ, false, 0};
  93        *link_settings = max_link_cap;
  94}
  95
  96static const struct link_encoder_funcs virtual_lnk_enc_funcs = {
  97        .validate_output_with_stream =
  98                virtual_link_encoder_validate_output_with_stream,
  99        .hw_init = virtual_link_encoder_hw_init,
 100        .setup = virtual_link_encoder_setup,
 101        .enable_tmds_output = virtual_link_encoder_enable_tmds_output,
 102        .enable_dp_output = virtual_link_encoder_enable_dp_output,
 103        .enable_dp_mst_output = virtual_link_encoder_enable_dp_mst_output,
 104        .disable_output = virtual_link_encoder_disable_output,
 105        .get_max_link_cap = virtual_link_encoder_get_max_link_cap,
 106        .dp_set_lane_settings = virtual_link_encoder_dp_set_lane_settings,
 107        .dp_set_phy_pattern = virtual_link_encoder_dp_set_phy_pattern,
 108        .update_mst_stream_allocation_table =
 109                virtual_link_encoder_update_mst_stream_allocation_table,
 110        .connect_dig_be_to_fe = virtual_link_encoder_connect_dig_be_to_fe,
 111        .destroy = virtual_link_encoder_destroy
 112};
 113
 114bool virtual_link_encoder_construct(
 115        struct link_encoder *enc, const struct encoder_init_data *init_data)
 116{
 117        enc->funcs = &virtual_lnk_enc_funcs;
 118        enc->ctx = init_data->ctx;
 119        enc->id = init_data->encoder;
 120
 121        enc->hpd_source = init_data->hpd_source;
 122        enc->connector = init_data->connector;
 123
 124        enc->transmitter = init_data->transmitter;
 125
 126        enc->output_signals = SIGNAL_TYPE_VIRTUAL;
 127
 128        enc->preferred_engine = ENGINE_ID_VIRTUAL;
 129
 130        return true;
 131}
 132
 133
 134