/*
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modification, are permitted provided that the following conditions are
met:
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      notice, this list of conditions and the following disclaimer.
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      copyright notice, this list of conditions and the following
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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
WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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*/

#include <utils/debug.h>
#include <vector>

#include "hw_peripheral_drm.h"

#define __CLASS__ "HWPeripheralDRM"

using sde_drm::DRMDisplayType;
using sde_drm::DRMOps;
using sde_drm::DRMPowerMode;
using sde_drm::DRMSecureMode;
using sde_drm::DRMCWbCaptureMode;

namespace sdm {

HWPeripheralDRM::HWPeripheralDRM(BufferSyncHandler *buffer_sync_handler,
                                 BufferAllocator *buffer_allocator,
                                 HWInfoInterface *hw_info_intf)
  : HWDeviceDRM(buffer_sync_handler, buffer_allocator, hw_info_intf) {
  disp_type_ = DRMDisplayType::PERIPHERAL;
  device_name_ = "Peripheral Display";
}

DisplayError HWPeripheralDRM::Init() {
  DisplayError ret = HWDeviceDRM::Init();
  if (ret != kErrorNone) {
    DLOGE("Init failed for %s", device_name_);
    return ret;
  }

  scalar_data_.resize(hw_resource_.hw_dest_scalar_info.count);

  return kErrorNone;
}

DisplayError HWPeripheralDRM::Validate(HWLayers *hw_layers) {
  HWLayersInfo &hw_layer_info = hw_layers->info;
  SetDestScalarData(hw_layer_info);
  SetupConcurrentWriteback(hw_layer_info, true);
  SetIdlePCState();

  return HWDeviceDRM::Validate(hw_layers);
}

DisplayError HWPeripheralDRM::Commit(HWLayers *hw_layers) {
  HWLayersInfo &hw_layer_info = hw_layers->info;
  SetDestScalarData(hw_layer_info);
  SetupConcurrentWriteback(hw_layer_info, false);
  SetIdlePCState();

  DisplayError error = HWDeviceDRM::Commit(hw_layers);
  if (error != kErrorNone) {
    return error;
  }

  if (cwb_config_.enabled && (error == kErrorNone)) {
    PostCommitConcurrentWriteback(hw_layer_info.stack->output_buffer);
  }

  // Initialize to default after successful commit
  synchronous_commit_ = false;

  return error;
}

void HWPeripheralDRM::ResetDisplayParams() {
  sde_dest_scalar_data_ = {};
  for (uint32_t j = 0; j < scalar_data_.size(); j++) {
    scalar_data_[j] = {};
  }
}

void HWPeripheralDRM::SetDestScalarData(HWLayersInfo hw_layer_info) {
  if (!hw_resource_.hw_dest_scalar_info.count) {
    return;
  }

  uint32_t index = 0;
  for (uint32_t i = 0; i < hw_resource_.hw_dest_scalar_info.count; i++) {
    DestScaleInfoMap::iterator it = hw_layer_info.dest_scale_info_map.find(i);

    if (it == hw_layer_info.dest_scale_info_map.end()) {
      continue;
    }

    HWDestScaleInfo *dest_scale_info = it->second;
    SDEScaler *scale = &scalar_data_[index];
    hw_scale_->SetScaler(dest_scale_info->scale_data, scale);
    sde_drm_dest_scaler_cfg *dest_scalar_data = &sde_dest_scalar_data_.ds_cfg[index];
    dest_scalar_data->flags = 0;
    if (scale->scaler_v2.enable) {
      dest_scalar_data->flags |= SDE_DRM_DESTSCALER_ENABLE;
    }
    if (scale->scaler_v2.de.enable) {
      dest_scalar_data->flags |= SDE_DRM_DESTSCALER_ENHANCER_UPDATE;
    }
    if (dest_scale_info->scale_update) {
      dest_scalar_data->flags |= SDE_DRM_DESTSCALER_SCALE_UPDATE;
    }
    dest_scalar_data->index = i;
    dest_scalar_data->lm_width = dest_scale_info->mixer_width;
    dest_scalar_data->lm_height = dest_scale_info->mixer_height;
    dest_scalar_data->scaler_cfg = reinterpret_cast<uint64_t>(&scale->scaler_v2);
    if (hw_panel_info_.partial_update) {
      dest_scalar_data->flags |= SDE_DRM_DESTSCALER_PU_ENABLE;
    }
    index++;
  }
  sde_dest_scalar_data_.num_dest_scaler = UINT32(hw_layer_info.dest_scale_info_map.size());
  drm_atomic_intf_->Perform(DRMOps::CRTC_SET_DEST_SCALER_CONFIG, token_.crtc_id,
                            reinterpret_cast<uint64_t>(&sde_dest_scalar_data_));
}

DisplayError HWPeripheralDRM::Flush() {
  DisplayError err = HWDeviceDRM::Flush();
  if (err != kErrorNone) {
    return err;
  }

  ResetDisplayParams();
  return kErrorNone;
}

void HWPeripheralDRM::SetupConcurrentWriteback(const HWLayersInfo &hw_layer_info, bool validate) {
  bool enable = hw_resource_.has_concurrent_writeback && hw_layer_info.stack->output_buffer;
  if (!(enable || cwb_config_.enabled)) {
    return;
  }

  bool setup_modes = enable && !cwb_config_.enabled && validate;
  if (setup_modes && (SetupConcurrentWritebackModes() == kErrorNone)) {
    cwb_config_.enabled = true;
  }

  if (cwb_config_.enabled) {
    if (enable) {
      // Set DRM properties for Concurrent Writeback.
      ConfigureConcurrentWriteback(hw_layer_info.stack);
    } else {
      // Tear down the Concurrent Writeback topology.
      drm_atomic_intf_->Perform(DRMOps::CONNECTOR_SET_CRTC, cwb_config_.token.conn_id, 0);
    }
  }
}

DisplayError HWPeripheralDRM::SetupConcurrentWritebackModes() {
  // To setup Concurrent Writeback topology, get the Connector ID of Virtual display
  if (drm_mgr_intf_->RegisterDisplay(DRMDisplayType::VIRTUAL, &cwb_config_.token)) {
    DLOGE("RegisterDisplay failed for Concurrent Writeback");
    return kErrorResources;
  }

  // Set the modes based on Primary display.
  std::vector<drmModeModeInfo> modes;
  for (auto &item : connector_info_.modes) {
    modes.push_back(item.mode);
  }

  // Inform the mode list to driver.
  struct sde_drm_wb_cfg cwb_cfg = {};
  cwb_cfg.connector_id = cwb_config_.token.conn_id;
  cwb_cfg.flags = SDE_DRM_WB_CFG_FLAGS_CONNECTED;
  cwb_cfg.count_modes = UINT32(modes.size());
  cwb_cfg.modes = (uint64_t)modes.data();

  int ret = -EINVAL;
#ifdef DRM_IOCTL_SDE_WB_CONFIG
  ret = drmIoctl(dev_fd_, DRM_IOCTL_SDE_WB_CONFIG, &cwb_cfg);
#endif
  if (ret) {
    drm_mgr_intf_->UnregisterDisplay(cwb_config_.token);
    DLOGE("Dump CWBConfig: mode_count %d flags %x", cwb_cfg.count_modes, cwb_cfg.flags);
    DumpConnectorModeInfo();
    return kErrorHardware;
  }

  return kErrorNone;
}

void HWPeripheralDRM::ConfigureConcurrentWriteback(LayerStack *layer_stack) {
  LayerBuffer *output_buffer = layer_stack->output_buffer;
  registry_.MapOutputBufferToFbId(output_buffer);

  // Set the topology for Concurrent Writeback: [CRTC_PRIMARY_DISPLAY - CONNECTOR_VIRTUAL_DISPLAY].
  drm_atomic_intf_->Perform(DRMOps::CONNECTOR_SET_CRTC, cwb_config_.token.conn_id, token_.crtc_id);

  // Set CRTC Capture Mode
  DRMCWbCaptureMode capture_mode = layer_stack->flags.post_processed_output ?
                                   DRMCWbCaptureMode::DSPP_OUT : DRMCWbCaptureMode::MIXER_OUT;
  drm_atomic_intf_->Perform(DRMOps::CRTC_SET_CAPTURE_MODE, token_.crtc_id, capture_mode);

  // Set Connector Output FB
  uint32_t fb_id = registry_.GetOutputFbId(output_buffer->handle_id);
  drm_atomic_intf_->Perform(DRMOps::CONNECTOR_SET_OUTPUT_FB_ID, cwb_config_.token.conn_id, fb_id);

  // Set Connector Secure Mode
  bool secure = output_buffer->flags.secure;
  DRMSecureMode mode = secure ? DRMSecureMode::SECURE : DRMSecureMode::NON_SECURE;
  drm_atomic_intf_->Perform(DRMOps::CONNECTOR_SET_FB_SECURE_MODE, cwb_config_.token.conn_id, mode);

  // Set Connector Output Rect
  sde_drm::DRMRect dst = {};
  dst.left = 0;
  dst.top = 0;
  dst.right = display_attributes_[current_mode_index_].x_pixels;
  dst.bottom = display_attributes_[current_mode_index_].y_pixels;
  drm_atomic_intf_->Perform(DRMOps::CONNECTOR_SET_OUTPUT_RECT, cwb_config_.token.conn_id, dst);
}

void HWPeripheralDRM::PostCommitConcurrentWriteback(LayerBuffer *output_buffer) {
  bool enabled = hw_resource_.has_concurrent_writeback && output_buffer;

  if (enabled) {
    // Get Concurrent Writeback fence
    int *fence = &output_buffer->release_fence_fd;
    drm_atomic_intf_->Perform(DRMOps::CONNECTOR_GET_RETIRE_FENCE, cwb_config_.token.conn_id, fence);
  } else {
    drm_mgr_intf_->UnregisterDisplay(cwb_config_.token);
    cwb_config_.enabled = false;
  }
}

DisplayError HWPeripheralDRM::ControlIdlePowerCollapse(bool enable, bool synchronous) {
  sde_drm::DRMIdlePCState idle_pc_state =
    enable ? sde_drm::DRMIdlePCState::ENABLE : sde_drm::DRMIdlePCState::DISABLE;
  if (idle_pc_state == idle_pc_state_) {
    return kErrorNone;
  }
  // As idle PC is disabled after subsequent commit, Make sure to have synchrounous commit and
  // ensure TA accesses the display_cc registers after idle PC is disabled.
  idle_pc_state_ = idle_pc_state;
  synchronous_commit_ = !enable ? synchronous : false;
  return kErrorNone;
}

DisplayError HWPeripheralDRM::PowerOn(int *release_fence) {
  DTRACE_SCOPED();
  if (!drm_atomic_intf_) {
    DLOGE("DRM Atomic Interface is null!");
    return kErrorUndefined;
  }

  if (first_cycle_) {
    return kErrorNone;
  }
  drm_atomic_intf_->Perform(sde_drm::DRMOps::CRTC_SET_IDLE_PC_STATE, token_.crtc_id,
                            sde_drm::DRMIdlePCState::ENABLE);
  DisplayError err = HWDeviceDRM::PowerOn(release_fence);
  if (err != kErrorNone) {
    return err;
  }
  idle_pc_state_ = sde_drm::DRMIdlePCState::ENABLE;

  return kErrorNone;
}

}  // namespace sdm