composer/display_null.cpp

/*
* Copyright (c) 2017-2021, The Linux Foundation. All rights reserved.
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*       copyright notice, this list of conditions and the following
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*       with the distribution.
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*       contributors may be used to endorse or promote products derived
*       from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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/*
 * Changes from Qualcomm Innovation Center are provided under the following license:
 *
 * Copyright (c) 2022-2023 Qualcomm Innovation Center, Inc. All rights reserved.
 * SPDX-License-Identifier: BSD-3-Clause-Clear
 */

#include <algorithm>
#include <cstring>

#include "display_null.h"

#define __CLASS__ "DisplayNull"

namespace sdm {

DisplayError DisplayNull::Init() {
  default_variable_config_.vsync_period_ns = 16600000;
  default_variable_config_.x_pixels = 1080;
  default_variable_config_.y_pixels = 1920;
  default_variable_config_.x_dpi = 300;
  default_variable_config_.y_dpi = 300;
  default_variable_config_.fps = 60;
  default_variable_config_.is_yuv = false;

  return kErrorNone;
}

DisplayError DisplayNull::GetMixerResolution(uint32_t *width, uint32_t *height) {
  if (!width || !height) {
    return kErrorParameters;
  }

  *width = default_variable_config_.x_pixels;
  *height = default_variable_config_.y_pixels;
  return kErrorNone;
}

DisplayError DisplayNull::GetFrameBufferConfig(DisplayConfigVariableInfo *variable_info) {
  if (!variable_info) {
    return kErrorParameters;
  }

  *variable_info = default_variable_config_;
  return kErrorNone;
}

DisplayError DisplayNull::GetConfig(uint32_t index, DisplayConfigVariableInfo *disp_attr) {
  if (!disp_attr) {
    return kErrorParameters;
  }

  *disp_attr = default_variable_config_;
  return kErrorNone;
}

DisplayError DisplayNull::GetConfig(DisplayConfigFixedInfo *fixed_info) {
  if (!fixed_info) {
    return kErrorParameters;
  }

  *fixed_info = default_fixed_config_;
  return kErrorNone;
}

DisplayError DisplayNull::GetRealConfig(uint32_t index, DisplayConfigVariableInfo *disp_attr) {
  if (!disp_attr) {
    return kErrorParameters;
  }

  *disp_attr = default_variable_config_;
  return kErrorNone;
}

DisplayError DisplayNull::GetRefreshRateRange(uint32_t *min_refresh_rate,
                                              uint32_t *max_refresh_rate) {
  if (!min_refresh_rate || !max_refresh_rate) {
    return kErrorParameters;
  }

  *min_refresh_rate = 60;
  *max_refresh_rate = 60;
  return kErrorNone;
}

DisplayError DisplayNull::GetActiveConfig(uint32_t *config) {
  if (!config) {
    return kErrorParameters;
  }

  *config = 0;
  return kErrorNone;
}

DisplayError DisplayNull::GetNumVariableInfoConfigs(uint32_t *count) {
  if (!count) {
    return kErrorParameters;
  }

  *count = 1;
  return kErrorNone;
}

DisplayError DisplayNull::Prepare(LayerStack *layer_stack) {
  if (!layer_stack) {
    return kErrorParameters;
  }

  for (auto layer : layer_stack->layers) {
    layer->composition = kCompositionGPU;
  }
  return kErrorNone;
}

DisplayError DisplayNull::GetDisplayIdentificationData(uint8_t *out_port, uint32_t *out_data_size,
                                                       uint8_t *out_data) {
  *out_port = 1;  // DSI0 Encoder Index
  if (out_data == nullptr) {
    *out_data_size = (uint32_t)(edid_.size());
  } else {
    *out_data_size = std::min(*out_data_size, (uint32_t)(edid_.size()));
    memcpy(out_data, edid_.data(), *out_data_size);
  }

  return kErrorNone;
}

}  // namespace sdm