drivers/gpu/drm/amd/display/dc/virtual/virtual_link_encoder.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 <linux/slab.h>
  27
  28 #include "dm_services.h"
  29 #include "dm_services_types.h"
  30
  31 #include "virtual_link_encoder.h"
  32
  33 static bool virtual_link_encoder_validate_output_with_stream(
  34         struct link_encoder *enc,
  35         const struct dc_stream_state *stream) { return true; }
  36
  37 static void virtual_link_encoder_hw_init(struct link_encoder *enc) {}
  38
  39 static void virtual_link_encoder_setup(
  40         struct link_encoder *enc,
  41         enum signal_type signal) {}
  42
  43 static 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
  50 static 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
  55 static 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
  60 static void virtual_link_encoder_disable_output(
  61         struct link_encoder *link_enc,
  62         enum signal_type signal) {}
  63
  64 static void virtual_link_encoder_dp_set_lane_settings(
  65         struct link_encoder *enc,
  66         const struct link_training_settings *link_settings) {}
  67
  68 static void virtual_link_encoder_dp_set_phy_pattern(
  69         struct link_encoder *enc,
  70         const struct encoder_set_dp_phy_pattern_param *param) {}
  71
  72 static void virtual_link_encoder_update_mst_stream_allocation_table(
  73         struct link_encoder *enc,
  74         const struct link_mst_stream_allocation_table *table) {}
  75
  76 static void virtual_link_encoder_connect_dig_be_to_fe(
  77         struct link_encoder *enc,
  78         enum engine_id engine,
  79         bool connect) {}
  80
  81 static void virtual_link_encoder_destroy(struct link_encoder **enc)
  82 {
  83         kfree(*enc);
  84         *enc = NULL;
  85 }
  86
  87 static 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
  96 static 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
 114 bool 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