android13/hardware/google/graphics/common/libhwc2.1/libdrmresource/drm/drmproperty.cpp

/*
 * Copyright (C) 2015 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "drmproperty.h"
#include "drmdevice.h"

#include <errno.h>
#include <stdint.h>
#include <string>

#include <xf86drmMode.h>
#include <log/log.h>
#include <inttypes.h>
#include <utils/Errors.h>

namespace android {

DrmProperty::DrmPropertyEnum::DrmPropertyEnum(drm_mode_property_enum *e)
    : value_(e->value), name_(e->name) {
}

DrmProperty::DrmPropertyEnum::~DrmPropertyEnum() {
}

DrmProperty::DrmProperty(drmModePropertyPtr p, uint64_t value)
    : id_(0), type_(DRM_PROPERTY_TYPE_INVALID), flags_(0), name_("") {
  Init(p, value);
}

void DrmProperty::Init(drmModePropertyPtr p, uint64_t value) {
  id_ = p->prop_id;
  flags_ = p->flags;
  name_ = p->name;
  value_ = value;

  for (int i = 0; i < p->count_values; ++i)
    values_.push_back(p->values[i]);

  for (int i = 0; i < p->count_enums; ++i)
    enums_.push_back(DrmPropertyEnum(&p->enums[i]));

  for (int i = 0; i < p->count_blobs; ++i)
    blob_ids_.push_back(p->blob_ids[i]);

  if ((flags_ & DRM_MODE_PROP_RANGE) ||
      (flags_ & DRM_MODE_PROP_SIGNED_RANGE))
    type_ = DRM_PROPERTY_TYPE_INT;
  else if (flags_ & DRM_MODE_PROP_ENUM)
    type_ = DRM_PROPERTY_TYPE_ENUM;
  else if (flags_ & DRM_MODE_PROP_OBJECT)
    type_ = DRM_PROPERTY_TYPE_OBJECT;
  else if (flags_ & DRM_MODE_PROP_BLOB)
    type_ = DRM_PROPERTY_TYPE_BLOB;
  else if (flags_ & DRM_MODE_PROP_BITMASK)
    type_ = DRM_PROPERTY_TYPE_BITMASK;
}

uint32_t DrmProperty::id() const {
  return id_;
}

std::string DrmProperty::name() const {
  return name_;
}

std::tuple<int, uint64_t> DrmProperty::value() const {
  if (type_ == DRM_PROPERTY_TYPE_BLOB)
    return std::make_tuple(0, value_);

  if (values_.size() == 0)
    return std::make_tuple(-ENOENT, 0);

  switch (type_) {
    case DRM_PROPERTY_TYPE_INT:
      return std::make_tuple(0, value_);

    case DRM_PROPERTY_TYPE_BITMASK:
      return std::make_tuple(0, value_);

    case DRM_PROPERTY_TYPE_ENUM:
      if (value_ >= enums_.size())
        return std::make_tuple(-ENOENT, 0);

      return std::make_tuple(0, enums_[value_].value_);

    case DRM_PROPERTY_TYPE_OBJECT:
      return std::make_tuple(0, value_);

    default:
      return std::make_tuple(-EINVAL, 0);
  }
}

void DrmProperty::printProperty() const
{
    ALOGD("=====================================================");
    ALOGD("name: %s, type(%d), value_(%" PRId64 ")", name_.c_str(), type_, value_);
    ALOGD("values.size(%zu)",  values_.size());
    for(uint32_t i = 0; i < values_.size(); i++) {
        ALOGD("[%d] %" PRId64 "", i, values_[i]);
    }
    ALOGD("enums.size(%zu)",  enums_.size());
    uint32_t i = 0;
    for (auto const &it : enums_) {
        ALOGD("[%d] %s %" PRId64 "", i++, it.name_.c_str(), it.value_);
    }
}

bool DrmProperty::is_immutable() const {
  return id_ && (flags_ & DRM_MODE_PROP_IMMUTABLE);
}

bool DrmProperty::is_range() const {
  return id_ && (flags_ & DRM_MODE_PROP_RANGE);
}

std::tuple<int, uint64_t> DrmProperty::range_min() const {
  if (!is_range())
    return std::make_tuple(-EINVAL, 0);
  if (values_.size() < 1)
    return std::make_tuple(-ENOENT, 0);

  return std::make_tuple(0, values_[0]);
}

std::tuple<int, uint64_t> DrmProperty::range_max() const {
  if (!is_range())
    return std::make_tuple(-EINVAL, 0);
  if (values_.size() < 2)
    return std::make_tuple(-ENOENT, 0);

  return std::make_tuple(0, values_[1]);
}

std::tuple<uint64_t, int> DrmProperty::GetEnumValueWithName(
    std::string name) const {
  for (auto it : enums_) {
    if (it.name_.compare(name) == 0) {
      return std::make_tuple(it.value_, 0);
    }
  }

  return std::make_tuple(UINT64_MAX, -EINVAL);
}

void DrmProperty::UpdateValue(uint64_t value) {
  value_ = value;
}

std::tuple<uint64_t, int> DrmEnumParser::halToDrmEnum(const uint32_t halData,
                                                      const MapHal2DrmEnum& drmEnums) {
    auto it = drmEnums.find(halData);
    if (it != drmEnums.end()) {
        return std::make_tuple(it->second, NO_ERROR);
    } else {
        ALOGE("%s::Failed to find standard enum(%d)",
                __func__, halData);
        return std::make_tuple(0, -EINVAL);
    }
}

void DrmEnumParser::parseEnums(const DrmProperty &property,
                               const std::vector<std::pair<uint32_t, const char *>> &enums,
                               MapHal2DrmEnum& out_enums) {
    uint64_t value;
    int err;
    for (auto &e : enums) {
        std::tie(value, err) = property.GetEnumValueWithName(e.second);
        if (err)
            ALOGE("Fail to find enum value with name %s", e.second);
        else
            out_enums[e.first] = value;
    }
}

}  // namespace android