drm/DrmPlane.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.
 */

#define LOG_TAG "hwc-drm-plane"

#include "DrmPlane.h"

#include <algorithm>
#include <cerrno>
#include <cinttypes>
#include <cstdint>

#include "DrmDevice.h"
#include "bufferinfo/BufferInfoGetter.h"
#include "utils/log.h"

namespace android {

DrmPlane::DrmPlane(DrmDevice *drm, drmModePlanePtr p)
    : drm_(drm),
      id_(p->plane_id),
      possible_crtc_mask_(p->possible_crtcs),
      formats_(p->formats, p->formats + p->count_formats) {
}

int DrmPlane::Init() {
  uint64_t enum_value = UINT64_MAX;
  DrmProperty p;

  int ret = drm_->GetPlaneProperty(*this, "type", &p);
  if (ret) {
    ALOGE("Could not get plane type property");
    return ret;
  }

  uint64_t type = 0;
  std::tie(ret, type) = p.value();
  if (ret) {
    ALOGE("Failed to get plane type property value");
    return ret;
  }
  switch (type) {
    case DRM_PLANE_TYPE_OVERLAY:
    case DRM_PLANE_TYPE_PRIMARY:
    case DRM_PLANE_TYPE_CURSOR:
      type_ = (uint32_t)type;
      break;
    default:
      ALOGE("Invalid plane type %" PRIu64, type);
      return -EINVAL;
  }

  ret = drm_->GetPlaneProperty(*this, "CRTC_ID", &crtc_property_);
  if (ret) {
    ALOGE("Could not get CRTC_ID property");
    return ret;
  }

  ret = drm_->GetPlaneProperty(*this, "FB_ID", &fb_property_);
  if (ret) {
    ALOGE("Could not get FB_ID property");
    return ret;
  }

  ret = drm_->GetPlaneProperty(*this, "CRTC_X", &crtc_x_property_);
  if (ret) {
    ALOGE("Could not get CRTC_X property");
    return ret;
  }

  ret = drm_->GetPlaneProperty(*this, "CRTC_Y", &crtc_y_property_);
  if (ret) {
    ALOGE("Could not get CRTC_Y property");
    return ret;
  }

  ret = drm_->GetPlaneProperty(*this, "CRTC_W", &crtc_w_property_);
  if (ret) {
    ALOGE("Could not get CRTC_W property");
    return ret;
  }

  ret = drm_->GetPlaneProperty(*this, "CRTC_H", &crtc_h_property_);
  if (ret) {
    ALOGE("Could not get CRTC_H property");
    return ret;
  }

  ret = drm_->GetPlaneProperty(*this, "SRC_X", &src_x_property_);
  if (ret) {
    ALOGE("Could not get SRC_X property");
    return ret;
  }

  ret = drm_->GetPlaneProperty(*this, "SRC_Y", &src_y_property_);
  if (ret) {
    ALOGE("Could not get SRC_Y property");
    return ret;
  }

  ret = drm_->GetPlaneProperty(*this, "SRC_W", &src_w_property_);
  if (ret) {
    ALOGE("Could not get SRC_W property");
    return ret;
  }

  ret = drm_->GetPlaneProperty(*this, "SRC_H", &src_h_property_);
  if (ret) {
    ALOGE("Could not get SRC_H property");
    return ret;
  }

  ret = drm_->GetPlaneProperty(*this, "zpos", &zpos_property_);
  if (ret)
    ALOGE("Could not get zpos property for plane %u", id());

  ret = drm_->GetPlaneProperty(*this, "rotation", &rotation_property_);
  if (ret)
    ALOGE("Could not get rotation property");

  ret = drm_->GetPlaneProperty(*this, "alpha", &alpha_property_);
  if (ret)
    ALOGI("Could not get alpha property");

  ret = drm_->GetPlaneProperty(*this, "pixel blend mode", &blend_property_);
  if (ret == 0) {
    std::tie(enum_value,
             ret) = blend_property_.GetEnumValueWithName("Pre-multiplied");
    if (ret == 0) {
      blending_enum_map_[DrmHwcBlending::kPreMult] = enum_value;
    }
    std::tie(enum_value,
             ret) = blend_property_.GetEnumValueWithName("Coverage");
    if (ret == 0) {
      blending_enum_map_[DrmHwcBlending::kCoverage] = enum_value;
    }
    std::tie(enum_value, ret) = blend_property_.GetEnumValueWithName("None");
    if (ret == 0) {
      blending_enum_map_[DrmHwcBlending::kNone] = enum_value;
    }
  } else {
    ALOGI("Could not get pixel blend mode property");
  }

  ret = drm_->GetPlaneProperty(*this, "IN_FENCE_FD", &in_fence_fd_property_);
  if (ret)
    ALOGI("Could not get IN_FENCE_FD property");

  if (HasNonRgbFormat()) {
    ret = drm_->GetPlaneProperty(*this, "COLOR_ENCODING",
                                 &color_encoding_propery_);
    if (ret == 0) {
      std::tie(enum_value, ret) = color_encoding_propery_.GetEnumValueWithName(
          "ITU-R BT.709 YCbCr");
      if (ret == 0) {
        color_encoding_enum_map_[DrmHwcColorSpace::kItuRec709] = enum_value;
      }
      std::tie(enum_value, ret) = color_encoding_propery_.GetEnumValueWithName(
          "ITU-R BT.601 YCbCr");
      if (ret == 0) {
        color_encoding_enum_map_[DrmHwcColorSpace::kItuRec601] = enum_value;
      }
      std::tie(enum_value, ret) = color_encoding_propery_.GetEnumValueWithName(
          "ITU-R BT.2020 YCbCr");
      if (ret == 0) {
        color_encoding_enum_map_[DrmHwcColorSpace::kItuRec2020] = enum_value;
      }
    } else {
      ALOGI("Could not get COLOR_ENCODING property");
    }

    ret = drm_->GetPlaneProperty(*this, "COLOR_RANGE", &color_range_property_);
    if (ret == 0) {
      std::tie(enum_value, ret) = color_range_property_.GetEnumValueWithName(
          "YCbCr full range");
      if (ret == 0) {
        color_range_enum_map_[DrmHwcSampleRange::kFullRange] = enum_value;
      }
      std::tie(enum_value, ret) = color_range_property_.GetEnumValueWithName(
          "YCbCr limited range");
      if (ret == 0) {
        color_range_enum_map_[DrmHwcSampleRange::kLimitedRange] = enum_value;
      }
    } else {
      ALOGI("Could not get COLOR_RANGE property");
    }
  }

  return 0;
}

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

bool DrmPlane::GetCrtcSupported(const DrmCrtc &crtc) const {
  return ((1 << crtc.pipe()) & possible_crtc_mask_) != 0;
}

bool DrmPlane::IsValidForLayer(DrmHwcLayer *layer) {
  if (rotation_property_.id() == 0) {
    if (layer->transform != DrmHwcTransform::kIdentity) {
      ALOGV("Rotation is not supported on plane %d", id_);
      return false;
    }
  } else {
    // For rotation checks, we assume the hardware reports its capabilities
    // consistently (e.g. a 270 degree rotation is a 90 degree rotation + H
    // flip + V flip; it wouldn't make sense to support all of the latter but
    // not the former).
    int ret = 0;
    const std::pair<enum DrmHwcTransform, std::string> transforms[] =
        {{kFlipH, "reflect-x"},
         {kFlipV, "reflect-y"},
         {kRotate90, "rotate-90"},
         {kRotate180, "rotate-180"},
         {kRotate270, "rotate-270"}};

    for (const auto &[transform, name] : transforms) {
      if (layer->transform & transform) {
        std::tie(std::ignore,
                 ret) = rotation_property_.GetEnumValueWithName(name);
        if (ret) {
          ALOGV("Rotation '%s' is not supported on plane %d", name.c_str(),
                id_);
          return false;
        }
      }
    }
  }

  if (alpha_property_.id() == 0 && layer->alpha != 0xffff) {
    ALOGV("Alpha is not supported on plane %d", id_);
    return false;
  }

  if (blending_enum_map_.count(layer->blending) == 0 &&
      layer->blending != DrmHwcBlending::kNone) {
    ALOGV("Blending is not supported on plane %d", id_);
    return false;
  }

  uint32_t format = layer->buffer_info.format;
  if (!IsFormatSupported(format)) {
    ALOGV("Plane %d does not supports %c%c%c%c format", id_, format,
          format >> 8, format >> 16, format >> 24);
    return false;
  }

  return true;
}

uint32_t DrmPlane::type() const {
  return type_;
}

bool DrmPlane::IsFormatSupported(uint32_t format) const {
  return std::find(std::begin(formats_), std::end(formats_), format) !=
         std::end(formats_);
}

bool DrmPlane::HasNonRgbFormat() const {
  return std::find_if_not(std::begin(formats_), std::end(formats_),
                          [](uint32_t format) {
                            return BufferInfoGetter::IsDrmFormatRgb(format);
                          }) != std::end(formats_);
}

auto DrmPlane::AtomicSetState(drmModeAtomicReq &pset, DrmHwcLayer &layer,
                              uint32_t zpos, uint32_t crtc_id) -> int {
  uint32_t fb_id = UINT32_MAX;
  int fence_fd = -1;
  hwc_rect_t display_frame;
  hwc_frect_t source_crop;
  uint64_t rotation = 0;
  uint64_t alpha = 0xFFFF;

  if (!layer.FbIdHandle) {
    ALOGE("Expected a valid framebuffer for pset");
    return -EINVAL;
  }

  fb_id = layer.FbIdHandle->GetFbId();
  fence_fd = layer.acquire_fence.Get();
  display_frame = layer.display_frame;
  source_crop = layer.source_crop;
  alpha = layer.alpha;

  // Disable the plane if there's no framebuffer
  if (fb_id == UINT32_MAX) {
    if (!AtomicDisablePlane(pset)) {
      return -EINVAL;
    }
    return 0;
  }

  if (zpos_property_ && !zpos_property_.is_immutable()) {
    uint64_t min_zpos = 0;

    // Ignore ret and use min_zpos as 0 by default
    std::tie(std::ignore, min_zpos) = zpos_property_.range_min();

    if (!zpos_property_.AtomicSet(pset, zpos + min_zpos)) {
      return -EINVAL;
    }
  }

  rotation = 0;
  if (layer.transform & DrmHwcTransform::kFlipH)
    rotation |= DRM_MODE_REFLECT_X;
  if (layer.transform & DrmHwcTransform::kFlipV)
    rotation |= DRM_MODE_REFLECT_Y;
  if (layer.transform & DrmHwcTransform::kRotate90)
    rotation |= DRM_MODE_ROTATE_90;
  else if (layer.transform & DrmHwcTransform::kRotate180)
    rotation |= DRM_MODE_ROTATE_180;
  else if (layer.transform & DrmHwcTransform::kRotate270)
    rotation |= DRM_MODE_ROTATE_270;
  else
    rotation |= DRM_MODE_ROTATE_0;

  if (fence_fd >= 0) {
    if (!in_fence_fd_property_.AtomicSet(pset, fence_fd)) {
      return -EINVAL;
    }
  }

  if (!crtc_property_.AtomicSet(pset, crtc_id) ||
      !fb_property_.AtomicSet(pset, fb_id) ||
      !crtc_x_property_.AtomicSet(pset, display_frame.left) ||
      !crtc_y_property_.AtomicSet(pset, display_frame.top) ||
      !crtc_w_property_.AtomicSet(pset,
                                  display_frame.right - display_frame.left) ||
      !crtc_h_property_.AtomicSet(pset,
                                  display_frame.bottom - display_frame.top) ||
      !src_x_property_.AtomicSet(pset, (int)(source_crop.left) << 16) ||
      !src_y_property_.AtomicSet(pset, (int)(source_crop.top) << 16) ||
      !src_w_property_.AtomicSet(pset,
                                 (int)(source_crop.right - source_crop.left)
                                     << 16) ||
      !src_h_property_.AtomicSet(pset,
                                 (int)(source_crop.bottom - source_crop.top)
                                     << 16)) {
    return -EINVAL;
  }

  if (rotation_property_) {
    if (!rotation_property_.AtomicSet(pset, rotation)) {
      return -EINVAL;
    }
  }

  if (alpha_property_) {
    if (!alpha_property_.AtomicSet(pset, alpha)) {
      return -EINVAL;
    }
  }

  if (blending_enum_map_.count(layer.blending) != 0 &&
      !blend_property_.AtomicSet(pset, blending_enum_map_[layer.blending])) {
    return -EINVAL;
  }

  if (color_encoding_enum_map_.count(layer.color_space) != 0 &&
      !color_encoding_propery_
           .AtomicSet(pset, color_encoding_enum_map_[layer.color_space])) {
    return -EINVAL;
  }

  if (color_range_enum_map_.count(layer.sample_range) != 0 &&
      !color_range_property_
           .AtomicSet(pset, color_range_enum_map_[layer.sample_range])) {
    return -EINVAL;
  }

  return 0;
}

auto DrmPlane::AtomicDisablePlane(drmModeAtomicReq &pset) -> int {
  if (!crtc_property_.AtomicSet(pset, 0) || !fb_property_.AtomicSet(pset, 0)) {
    return -EINVAL;
  }

  return 0;
}

const DrmProperty &DrmPlane::zpos_property() const {
  return zpos_property_;
}

}  // namespace android