xref: /hardware/qcom/display/msm8996/sdm/libs/core/fb/hw_primary.cpp

/*
* Copyright (c) 2015 - 2016, The Linux Foundation. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*     * Redistributions of source code must retain the above copyright
*       notice, this list of conditions and the following disclaimer.
*     * Redistributions in binary form must reproduce the above
*       copyright notice, this list of conditions and the following
*       disclaimer in the documentation and/or other materials provided
*       with the distribution.
*     * Neither the name of The Linux Foundation nor the names of its
*       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
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <pthread.h>
#include <fcntl.h>
#include <sys/prctl.h>
#include <sys/ioctl.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <utils/debug.h>
#include <utils/sys.h>
#include <core/display_interface.h>

#include <string>

#include "hw_primary.h"
#include "hw_color_manager.h"

#define __CLASS__ "HWPrimary"

namespace sdm {

using std::string;

DisplayError HWPrimary::Create(HWInterface **intf, HWInfoInterface *hw_info_intf,
                               BufferSyncHandler *buffer_sync_handler,
                               HWEventHandler *eventhandler) {
  DisplayError error = kErrorNone;
  HWPrimary *hw_primary = NULL;

  hw_primary = new HWPrimary(buffer_sync_handler, hw_info_intf);
  error = hw_primary->Init(eventhandler);
  if (error != kErrorNone) {
    delete hw_primary;
  } else {
    *intf = hw_primary;
  }

  return error;
}

DisplayError HWPrimary::Destroy(HWInterface *intf) {
  HWPrimary *hw_primary = static_cast<HWPrimary *>(intf);
  hw_primary->Deinit();
  delete hw_primary;

  return kErrorNone;
}

HWPrimary::HWPrimary(BufferSyncHandler *buffer_sync_handler, HWInfoInterface *hw_info_intf)
  : HWDevice(buffer_sync_handler) {
  HWDevice::device_type_ = kDevicePrimary;
  HWDevice::device_name_ = "Primary Display Device";
  HWDevice::hw_info_intf_ = hw_info_intf;
}

DisplayError HWPrimary::Init(HWEventHandler *eventhandler) {
  DisplayError error = kErrorNone;
  char node_path[kMaxStringLength] = { 0 };
  char data[kMaxStringLength] = { 0 };
  const char *event_name[kNumDisplayEvents] = {"vsync_event", "show_blank_event", "idle_notify",
                                               "msm_fb_thermal_level"};

  error = HWDevice::Init(eventhandler);
  if (error != kErrorNone) {
    goto CleanupOnError;
  }

  error = PopulateDisplayAttributes();
  if (error != kErrorNone) {
    goto CleanupOnError;
  }

  // Open nodes for polling
  for (int event = 0; event < kNumDisplayEvents; event++) {
    poll_fds_[event].fd = -1;
  }

  if (!fake_vsync_) {
    for (int event = 0; event < kNumDisplayEvents; event++) {
      pollfd &poll_fd = poll_fds_[event];

      snprintf(node_path, sizeof(node_path), "%s%d/%s", fb_path_, fb_node_index_,
               event_name[event]);

      poll_fd.fd = Sys::open_(node_path, O_RDONLY);
      if (poll_fd.fd < 0) {
        DLOGE("open failed for event=%d, error=%s", event, strerror(errno));
        error = kErrorHardware;
        goto CleanupOnError;
      }

      // Read once on all fds to clear data on all fds.
      Sys::pread_(poll_fd.fd, data , kMaxStringLength, 0);
      poll_fd.events = POLLPRI | POLLERR;
    }
  }

  // Start the Event thread
  if (pthread_create(&event_thread_, NULL, &DisplayEventThread, this) < 0) {
    DLOGE("Failed to start %s, error = %s", event_thread_name_);
    error = kErrorResources;
    goto CleanupOnError;
  }

  // Disable HPD at start if HDMI is external, it will be enabled later when the display powers on
  // This helps for framework reboot or adb shell stop/start
  EnableHotPlugDetection(0);
  InitializeConfigs();

  return kErrorNone;

CleanupOnError:
  // Close all poll fds
  for (int event = 0; event < kNumDisplayEvents; event++) {
    int &fd = poll_fds_[event].fd;
    if (fd >= 0) {
      Sys::close_(fd);
    }
  }

  return error;
}

bool HWPrimary::GetCurrentModeFromSysfs(size_t *curr_x_pixels, size_t *curr_y_pixels) {
  bool ret = false;
  size_t len = kPageSize;
  string mode_path = string(fb_path_) + string("0/mode");

  FILE *fd = Sys::fopen_(mode_path.c_str(), "r");
  if (fd) {
    char *buffer = static_cast<char *>(calloc(len, sizeof(char)));

    if (buffer == NULL) {
      DLOGW("Failed to allocate memory");
      Sys::fclose_(fd);
      return false;
    }

    if (Sys::getline_(&buffer, &len, fd) > 0) {
      // String is of form "U:1600x2560p-0". Documentation/fb/modedb.txt in
      // kernel has more info on the format.
      size_t xpos = string(buffer).find(':');
      size_t ypos = string(buffer).find('x');

      if (xpos == string::npos || ypos == string::npos) {
        DLOGI("Resolution switch not supported");
      } else {
        *curr_x_pixels = static_cast<size_t>(atoi(buffer + xpos + 1));
        *curr_y_pixels = static_cast<size_t>(atoi(buffer + ypos + 1));
        DLOGI("Current Config: %u x %u", *curr_x_pixels, *curr_y_pixels);
        ret = true;
      }
    }

    free(buffer);
    Sys::fclose_(fd);
  }

  return ret;
}

void HWPrimary::InitializeConfigs() {
  size_t curr_x_pixels = 0;
  size_t curr_y_pixels = 0;
  size_t len = kPageSize;
  string modes_path = string(fb_path_) + string("0/modes");

  if (!GetCurrentModeFromSysfs(&curr_x_pixels, &curr_y_pixels)) {
    return;
  }

  FILE *fd = Sys::fopen_(modes_path.c_str(), "r");
  if (fd) {
    char *buffer = static_cast<char *>(calloc(len, sizeof(char)));

    if (buffer == NULL) {
      DLOGW("Failed to allocate memory");
      Sys::fclose_(fd);
      return;
    }

    while (Sys::getline_(&buffer, &len, fd) > 0) {
      DisplayConfigVariableInfo config;
      size_t xpos = string(buffer).find(':');
      size_t ypos = string(buffer).find('x');

      if (xpos == string::npos || ypos == string::npos) {
        continue;
      }

      config.x_pixels = UINT32(atoi(buffer + xpos + 1));
      config.y_pixels = UINT32(atoi(buffer + ypos + 1));
      DLOGI("Found mode %d x %d", config.x_pixels, config.y_pixels);
      display_configs_.push_back(config);
      display_config_strings_.push_back(string(buffer));

      if (curr_x_pixels == config.x_pixels && curr_y_pixels == config.y_pixels) {
        active_config_index_ = UINT32(display_configs_.size() - 1);
        DLOGI("Active config index %u", active_config_index_);
      }
    }

    free(buffer);
    Sys::fclose_(fd);
  } else {
    DLOGI("Unable to process modes");
  }
}

DisplayError HWPrimary::Deinit() {
  exit_threads_ = true;
  Sys::pthread_cancel_(event_thread_);
  pthread_join(event_thread_, NULL);

  for (int event = 0; event < kNumDisplayEvents; event++) {
    int &fd = poll_fds_[event].fd;
    if (fd >= 0) {
      Sys::close_(fd);
    }
  }

  return HWDevice::Deinit();
}

DisplayError HWPrimary::GetNumDisplayAttributes(uint32_t *count) {
  *count = IsResolutionSwitchEnabled() ? UINT32(display_configs_.size()) : 1;
  return kErrorNone;
}

DisplayError HWPrimary::GetActiveConfig(uint32_t *active_config_index) {
  *active_config_index = active_config_index_;
  return kErrorNone;
}

DisplayError HWPrimary::GetDisplayAttributes(uint32_t index,
                                             HWDisplayAttributes *display_attributes) {
  if (!display_attributes) {
    return kErrorParameters;
  }

  if (IsResolutionSwitchEnabled() && index >= display_configs_.size()) {
    return kErrorParameters;
  }

  *display_attributes = display_attributes_;
  if (IsResolutionSwitchEnabled()) {
    // Overwrite only the parent portion of object
    display_attributes->x_pixels = display_configs_.at(index).x_pixels;
    display_attributes->y_pixels = display_configs_.at(index).y_pixels;
  }

  return kErrorNone;
}

DisplayError HWPrimary::PopulateDisplayAttributes() {
  DTRACE_SCOPED();

  // Variable screen info
  STRUCT_VAR(fb_var_screeninfo, var_screeninfo);

  if (Sys::ioctl_(device_fd_, FBIOGET_VSCREENINFO, &var_screeninfo) < 0) {
    IOCTL_LOGE(FBIOGET_VSCREENINFO, device_type_);
    return kErrorHardware;
  }

  // Frame rate
  STRUCT_VAR(msmfb_metadata, meta_data);
  meta_data.op = metadata_op_frame_rate;
  if (Sys::ioctl_(device_fd_, MSMFB_METADATA_GET, &meta_data) < 0) {
    IOCTL_LOGE(MSMFB_METADATA_GET, device_type_);
    return kErrorHardware;
  }

  // If driver doesn't return width/height information, default to 160 dpi
  if (INT(var_screeninfo.width) <= 0 || INT(var_screeninfo.height) <= 0) {
    var_screeninfo.width  = UINT32(((FLOAT(var_screeninfo.xres) * 25.4f)/160.0f) + 0.5f);
    var_screeninfo.height = UINT32(((FLOAT(var_screeninfo.yres) * 25.4f)/160.0f) + 0.5f);
  }

  display_attributes_.x_pixels = var_screeninfo.xres;
  display_attributes_.y_pixels = var_screeninfo.yres;
  display_attributes_.v_front_porch = var_screeninfo.lower_margin;
  display_attributes_.v_back_porch = var_screeninfo.upper_margin;
  display_attributes_.v_pulse_width = var_screeninfo.vsync_len;
  uint32_t h_blanking = var_screeninfo.right_margin + var_screeninfo.left_margin +
      var_screeninfo.hsync_len;
  display_attributes_.h_total = var_screeninfo.xres + h_blanking;
  display_attributes_.x_dpi =
      (FLOAT(var_screeninfo.xres) * 25.4f) / FLOAT(var_screeninfo.width);
  display_attributes_.y_dpi =
      (FLOAT(var_screeninfo.yres) * 25.4f) / FLOAT(var_screeninfo.height);
  display_attributes_.fps = meta_data.data.panel_frame_rate;
  display_attributes_.vsync_period_ns = UINT32(1000000000L / display_attributes_.fps);
  display_attributes_.is_device_split = (hw_panel_info_.split_info.left_split ||
      (var_screeninfo.xres > hw_resource_.max_mixer_width)) ? true : false;
  display_attributes_.split_left = hw_panel_info_.split_info.left_split ?
      hw_panel_info_.split_info.left_split : display_attributes_.x_pixels / 2;
  display_attributes_.h_total += display_attributes_.is_device_split ? h_blanking : 0;

  return kErrorNone;
}

DisplayError HWPrimary::SetDisplayAttributes(uint32_t index) {
  DisplayError ret = kErrorNone;

  if (!IsResolutionSwitchEnabled()) {
    return kErrorNotSupported;
  }

  if (index >= display_configs_.size()) {
    return kErrorParameters;
  }

  string mode_path = string(fb_path_) + string("0/mode");
  int fd = Sys::open_(mode_path.c_str(), O_WRONLY);

  if (fd < 0) {
    DLOGE("Opening mode failed");
    return kErrorNotSupported;
  }

  ssize_t written = Sys::pwrite_(fd, display_config_strings_.at(index).c_str(),
                                 display_config_strings_.at(index).length(), 0);
  if (written > 0) {
    DLOGI("Successfully set config %u", index);
    PopulateHWPanelInfo();
    PopulateDisplayAttributes();
    active_config_index_ = index;
  } else {
    DLOGE("Writing config index %u failed with error: %s", index, strerror(errno));
    ret = kErrorParameters;
  }

  Sys::close_(fd);

  return ret;
}

DisplayError HWPrimary::SetRefreshRate(uint32_t refresh_rate) {
  char node_path[kMaxStringLength] = {0};

  if (refresh_rate == display_attributes_.fps) {
    return kErrorNone;
  }

  snprintf(node_path, sizeof(node_path), "%s%d/dynamic_fps", fb_path_, fb_node_index_);

  int fd = Sys::open_(node_path, O_WRONLY);
  if (fd < 0) {
    DLOGE("Failed to open %s with error %s", node_path, strerror(errno));
    return kErrorFileDescriptor;
  }

  char refresh_rate_string[kMaxStringLength];
  snprintf(refresh_rate_string, sizeof(refresh_rate_string), "%d", refresh_rate);
  DLOGI_IF(kTagDriverConfig, "Setting refresh rate = %d", refresh_rate);
  ssize_t len = Sys::pwrite_(fd, refresh_rate_string, strlen(refresh_rate_string), 0);
  if (len < 0) {
    DLOGE("Failed to write %d with error %s", refresh_rate, strerror(errno));
    Sys::close_(fd);
    return kErrorUndefined;
  }
  Sys::close_(fd);

  DisplayError error = PopulateDisplayAttributes();
  if (error != kErrorNone) {
    return error;
  }

  return kErrorNone;
}

DisplayError HWPrimary::GetConfigIndex(uint32_t mode, uint32_t *index) {
  return HWDevice::GetConfigIndex(mode, index);
}

DisplayError HWPrimary::PowerOff() {
  if (Sys::ioctl_(device_fd_, FBIOBLANK, FB_BLANK_POWERDOWN) < 0) {
    IOCTL_LOGE(FB_BLANK_POWERDOWN, device_type_);
    return kErrorHardware;
  }

  return kErrorNone;
}

DisplayError HWPrimary::Doze() {
  if (Sys::ioctl_(device_fd_, FBIOBLANK, FB_BLANK_NORMAL) < 0) {
    IOCTL_LOGE(FB_BLANK_NORMAL, device_type_);
    return kErrorHardware;
  }

  return kErrorNone;
}

DisplayError HWPrimary::DozeSuspend() {
  if (Sys::ioctl_(device_fd_, FBIOBLANK, FB_BLANK_VSYNC_SUSPEND) < 0) {
    IOCTL_LOGE(FB_BLANK_VSYNC_SUSPEND, device_type_);
    return kErrorHardware;
  }

  return kErrorNone;
}

DisplayError HWPrimary::Validate(HWLayers *hw_layers) {
  HWDevice::ResetDisplayParams();

  mdp_layer_commit_v1 &mdp_commit = mdp_disp_commit_.commit_v1;

  LayerRect left_roi = hw_layers->info.left_partial_update;
  LayerRect right_roi = hw_layers->info.right_partial_update;
  mdp_commit.left_roi.x = UINT32(left_roi.left);
  mdp_commit.left_roi.y = UINT32(left_roi.top);
  mdp_commit.left_roi.w = UINT32(left_roi.right - left_roi.left);
  mdp_commit.left_roi.h = UINT32(left_roi.bottom - left_roi.top);

  // SDM treats ROI as one full coordinate system.
  // In case source split is disabled, However, Driver assumes Mixer to operate in
  // different co-ordinate system.
  if (!hw_resource_.is_src_split) {
    mdp_commit.right_roi.x = UINT32(right_roi.left) - hw_panel_info_.split_info.left_split;
    mdp_commit.right_roi.y = UINT32(right_roi.top);
    mdp_commit.right_roi.w = UINT32(right_roi.right - right_roi.left);
    mdp_commit.right_roi.h = UINT32(right_roi.bottom - right_roi.top);
  }

  return HWDevice::Validate(hw_layers);
}

void* HWPrimary::DisplayEventThread(void *context) {
  if (context) {
    return reinterpret_cast<HWPrimary *>(context)->DisplayEventThreadHandler();
  }

  return NULL;
}

void* HWPrimary::DisplayEventThreadHandler() {
  char data[kMaxStringLength] = {0};

  prctl(PR_SET_NAME, event_thread_name_, 0, 0, 0);
  setpriority(PRIO_PROCESS, 0, kThreadPriorityUrgent);

  if (fake_vsync_) {
    while (!exit_threads_) {
      // Fake vsync is used only when set explicitly through a property(todo) or when
      // the vsync timestamp node cannot be opened at bootup. There is no
      // fallback to fake vsync from the true vsync loop, ever, as the
      // condition can easily escape detection.
      // Also, fake vsync is delivered only for the primary display.
      usleep(16666);
      STRUCT_VAR(timeval, time_now);
      gettimeofday(&time_now, NULL);
      int64_t ts = int64_t(time_now.tv_sec)*1000000000LL +int64_t(time_now.tv_usec)*1000LL;

      // Send Vsync event for primary display(0)
      event_handler_->VSync(ts);
    }

    pthread_exit(0);
  }

  typedef void (HWPrimary::*EventHandler)(char*);
  EventHandler event_handler[kNumDisplayEvents] = { &HWPrimary::HandleVSync,
                                                    &HWPrimary::HandleBlank,
                                                    &HWPrimary::HandleIdleTimeout,
                                                    &HWPrimary::HandleThermal };

  while (!exit_threads_) {
    int error = Sys::poll_(poll_fds_, kNumDisplayEvents, -1);
    if (error <= 0) {
      DLOGW("poll failed. error = %s", strerror(errno));
      continue;
    }

    for (int event = 0; event < kNumDisplayEvents; event++) {
      pollfd &poll_fd = poll_fds_[event];

      if (poll_fd.revents & POLLPRI) {
        if (Sys::pread_(poll_fd.fd, data, kMaxStringLength, 0) > 0) {
          (this->*event_handler[event])(data);
        }
      }
    }
  }

  pthread_exit(0);

  return NULL;
}

void HWPrimary::HandleVSync(char *data) {
  int64_t timestamp = 0;
  if (!strncmp(data, "VSYNC=", strlen("VSYNC="))) {
    timestamp = strtoll(data + strlen("VSYNC="), NULL, 0);
  }
  event_handler_->VSync(timestamp);
}

void HWPrimary::HandleBlank(char *data) {
  // TODO(user): Need to send blank Event
}

void HWPrimary::HandleIdleTimeout(char *data) {
  event_handler_->IdleTimeout();
}

void HWPrimary::HandleThermal(char *data) {
  int64_t thermal_level = 0;
  if (!strncmp(data, "thermal_level=", strlen("thermal_level="))) {
    thermal_level = strtoll(data + strlen("thermal_level="), NULL, 0);
  }

  DLOGI("Received thermal notification with thermal level = %d", thermal_level);

  event_handler_->ThermalEvent(thermal_level);
}

void HWPrimary::SetIdleTimeoutMs(uint32_t timeout_ms) {
  char node_path[kMaxStringLength] = {0};

  DLOGI_IF(kTagDriverConfig, "Setting idle timeout to = %d ms", timeout_ms);

  snprintf(node_path, sizeof(node_path), "%s%d/idle_time", fb_path_, fb_node_index_);

  // Open a sysfs node to send the timeout value to driver.
  int fd = Sys::open_(node_path, O_WRONLY);
  if (fd < 0) {
    DLOGE("Unable to open %s, node %s", node_path, strerror(errno));
    return;
  }

  char timeout_string[64];
  snprintf(timeout_string, sizeof(timeout_string), "%d", timeout_ms);

  // Notify driver about the timeout value
  ssize_t length = Sys::pwrite_(fd, timeout_string, strlen(timeout_string), 0);
  if (length <= 0) {
    DLOGE("Unable to write into %s, node %s", node_path, strerror(errno));
  }

  Sys::close_(fd);
}

DisplayError HWPrimary::SetVSyncState(bool enable) {
  DTRACE_SCOPED();

  int vsync_on = enable ? 1 : 0;
  if (Sys::ioctl_(device_fd_, MSMFB_OVERLAY_VSYNC_CTRL, &vsync_on) < 0) {
    IOCTL_LOGE(MSMFB_OVERLAY_VSYNC_CTRL, device_type_);
    return kErrorHardware;
  }

  return kErrorNone;
}

DisplayError HWPrimary::SetDisplayMode(const HWDisplayMode hw_display_mode) {
  uint32_t mode = kModeDefault;

  switch (hw_display_mode) {
  case kModeVideo:
    mode = kModeLPMVideo;
    break;
  case kModeCommand:
    mode = kModeLPMCommand;
    break;
  default:
    DLOGW("Failed to translate SDE display mode %d to a MSMFB_LPM_ENABLE mode",
          hw_display_mode);
    return kErrorParameters;
  }

  if (Sys::ioctl_(device_fd_, INT(MSMFB_LPM_ENABLE), &mode) < 0) {
    IOCTL_LOGE(MSMFB_LPM_ENABLE, device_type_);
    return kErrorHardware;
  }

  DLOGI("Triggering display mode change to %d on next commit.", hw_display_mode);
  synchronous_commit_ = true;

  return kErrorNone;
}

DisplayError HWPrimary::SetPanelBrightness(int level) {
  char buffer[MAX_SYSFS_COMMAND_LENGTH] = {0};

  DLOGV_IF(kTagDriverConfig, "Set brightness level to %d", level);
  int fd = Sys::open_(kBrightnessNode, O_RDWR);
  if (fd < 0) {
    DLOGV_IF(kTagDriverConfig, "Failed to open node = %s, error = %s ", kBrightnessNode,
             strerror(errno));
    return kErrorFileDescriptor;
  }

  int32_t bytes = snprintf(buffer, MAX_SYSFS_COMMAND_LENGTH, "%d\n", level);
  if (bytes < 0) {
    DLOGV_IF(kTagDriverConfig, "Failed to copy new brightness level = %d", level);
    Sys::close_(fd);
    return kErrorUndefined;
  }

  ssize_t ret = Sys::pwrite_(fd, buffer, static_cast<size_t>(bytes), 0);
  if (ret <= 0) {
    DLOGV_IF(kTagDriverConfig, "Failed to write to node = %s, error = %s ", kBrightnessNode,
             strerror(errno));
    Sys::close_(fd);
    return kErrorUndefined;
  }
  Sys::close_(fd);

  return kErrorNone;
}

DisplayError HWPrimary::GetPanelBrightness(int *level) {
  char brightness[kMaxStringLength] = {0};

  if (!level) {
    DLOGV_IF(kTagDriverConfig, "Invalid input, null pointer.");
    return kErrorParameters;
  }

  int fd = Sys::open_(kBrightnessNode, O_RDWR);
  if (fd < 0) {
    DLOGV_IF(kTagDriverConfig, "Failed to open brightness node = %s, error = %s", kBrightnessNode,
             strerror(errno));
    return kErrorFileDescriptor;
  }

  if (Sys::pread_(fd, brightness, sizeof(brightness), 0) > 0) {
    *level = atoi(brightness);
    DLOGV_IF(kTagDriverConfig, "Brightness level = %d", *level);
  }
  Sys::close_(fd);

  return kErrorNone;
}

DisplayError HWPrimary::SetAutoRefresh(bool enable) {
  const int kWriteLength = 2;
  char buffer[kWriteLength] = {'\0'};
  ssize_t bytes = snprintf(buffer, kWriteLength, "%d", enable);

  if (enable == auto_refresh_) {
    return kErrorNone;
  }

  if (HWDevice::SysFsWrite(kAutoRefreshNode, buffer, bytes) <= 0) {  // Returns bytes written
    return kErrorUndefined;
  }

  auto_refresh_ = enable;

  return kErrorNone;
}

DisplayError HWPrimary::GetPPFeaturesVersion(PPFeatureVersion *vers) {
  STRUCT_VAR(mdp_pp_feature_version, version);

  uint32_t feature_id_mapping[kMaxNumPPFeatures] = { PCC, IGC, GC, GC, PA, DITHER, GAMUT };

  for (int i(0); i < kMaxNumPPFeatures; i++) {
    version.pp_feature = feature_id_mapping[i];

    if (Sys::ioctl_(device_fd_,  INT(MSMFB_MDP_PP_GET_FEATURE_VERSION), &version) < 0) {
      IOCTL_LOGE(MSMFB_MDP_PP_GET_FEATURE_VERSION, device_type_);
      return kErrorHardware;
    }
    vers->version[i] = version.version_info;
  }

  return kErrorNone;
}

// It was entered with PPFeaturesConfig::locker_ being hold.
DisplayError HWPrimary::SetPPFeatures(PPFeaturesConfig *feature_list) {
  STRUCT_VAR(msmfb_mdp_pp, kernel_params);
  int ret = 0;
  PPFeatureInfo *feature = NULL;

  while (true) {
    ret = feature_list->RetrieveNextFeature(&feature);
    if (ret)
        break;

    if (feature) {
      DLOGV_IF(kTagDriverConfig, "feature_id = %d", feature->feature_id_);

      if ((feature->feature_id_ < kMaxNumPPFeatures)) {
        HWColorManager::SetFeature[feature->feature_id_](*feature, &kernel_params);
        if (Sys::ioctl_(device_fd_, INT(MSMFB_MDP_PP), &kernel_params) < 0) {
          IOCTL_LOGE(MSMFB_MDP_PP, device_type_);

          feature_list->Reset();
          return kErrorHardware;
        }
      }
    }
  }  // while(true)

  // Once all features were consumed, then destroy all feature instance from feature_list,
  // Then mark it as non-dirty of PPFeaturesConfig cache.
  feature_list->Reset();

  return kErrorNone;
}

}  // namespace sdm