| /* |
| * Copyright 2010, Intel Corporation |
| * |
| * This file is part of PowerTOP |
| * |
| * This program file is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License as published by the |
| * Free Software Foundation; version 2 of the License. |
| * |
| * This program is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program in a file named COPYING; if not, write to the |
| * Free Software Foundation, Inc, |
| * 51 Franklin Street, Fifth Floor, |
| * Boston, MA 02110-1301 USA |
| * or just google for it. |
| * |
| * Authors: |
| * Arjan van de Ven <arjan@linux.intel.com> |
| */ |
| #include <iostream> |
| #include <fstream> |
| |
| #include <stdio.h> |
| #include <sys/types.h> |
| #include <dirent.h> |
| |
| |
| using namespace std; |
| |
| #include "device.h" |
| #include "backlight.h" |
| #include "../parameters/parameters.h" |
| |
| #include <string.h> |
| |
| |
| backlight::backlight(char *_name, char *path): device() |
| { |
| char devname[128]; |
| min_level = 0; |
| max_level = 0; |
| start_level = 0; |
| end_level = 0; |
| strncpy(sysfs_path, path, sizeof(sysfs_path)); |
| register_sysfs_path(sysfs_path); |
| sprintf(devname, "backlight:%s", _name); |
| strncpy(name, devname, sizeof(name)); |
| r_index = get_result_index(name); |
| r_index_power = 0; |
| } |
| |
| void backlight::start_measurement(void) |
| { |
| char filename[4096]; |
| ifstream file; |
| |
| sprintf(filename, "%s/max_brightness", sysfs_path); |
| file.open(filename, ios::in); |
| if (file) { |
| file >> max_level; |
| } |
| file.close(); |
| |
| sprintf(filename, "%s/actual_brightness", sysfs_path); |
| file.open(filename, ios::in); |
| if (file) { |
| file >> start_level; |
| file.close(); |
| } |
| } |
| |
| static int dpms_screen_on(void) |
| { |
| DIR *dir; |
| struct dirent *entry; |
| char filename[4096]; |
| char line[4096]; |
| ifstream file; |
| |
| dir = opendir("/sys/class/drm/card0"); |
| if (!dir) |
| return 1; |
| while (1) { |
| entry = readdir(dir); |
| if (!entry) |
| break; |
| |
| sprintf(filename, "/sys/class/drm/card0/%s/enabled", entry->d_name); |
| file.open(filename, ios::in); |
| if (!file) |
| continue; |
| file.getline(line, 4096); |
| file.close(); |
| if (strcmp(line, "enabled") != 0) |
| continue; |
| sprintf(filename, "/sys/class/drm/card0/%s/dpms", entry->d_name); |
| file.open(filename, ios::in); |
| if (!file) |
| continue; |
| file.getline(line, 4096); |
| file.close(); |
| if (strcmp(line, "On") == 0) { |
| closedir(dir); |
| return 1; |
| } |
| } |
| closedir(dir); |
| return 0; |
| } |
| |
| void backlight::end_measurement(void) |
| { |
| char filename[4096]; |
| char powername[4096]; |
| ifstream file; |
| double p; |
| int _backlight = 0; |
| |
| sprintf(filename, "%s/actual_brightness", sysfs_path); |
| file.open(filename, ios::in); |
| if (file) { |
| file >> end_level; |
| } |
| file.close(); |
| |
| if (dpms_screen_on()) { |
| p = 100.0 * (end_level + start_level) / 2 / max_level; |
| _backlight = 100; |
| } else { |
| p = 0; |
| } |
| |
| report_utilization(name, p); |
| sprintf(powername, "%s-power", name); |
| report_utilization(powername, _backlight); |
| } |
| |
| |
| double backlight::utilization(void) |
| { |
| double p; |
| |
| p = 100.0 * (end_level + start_level) / 2 / max_level; |
| return p; |
| } |
| |
| const char * backlight::device_name(void) |
| { |
| return name; |
| } |
| |
| void create_all_backlights(void) |
| { |
| struct dirent *entry; |
| DIR *dir; |
| char filename[4096]; |
| |
| dir = opendir("/sys/class/backlight/"); |
| if (!dir) |
| return; |
| while (1) { |
| class backlight *bl; |
| entry = readdir(dir); |
| if (!entry) |
| break; |
| if (entry->d_name[0] == '.') |
| continue; |
| sprintf(filename, "/sys/class/backlight/%s", entry->d_name); |
| bl = new class backlight(entry->d_name, filename); |
| all_devices.push_back(bl); |
| register_parameter("backlight"); |
| register_parameter("backlight-power"); |
| register_parameter("backlight-boost-40", 0, 0.5); |
| register_parameter("backlight-boost-80", 0, 0.5); |
| register_parameter("backlight-boost-100", 0, 0.5); |
| } |
| closedir(dir); |
| |
| } |
| |
| |
| |
| double backlight::power_usage(struct result_bundle *result, struct parameter_bundle *bundle) |
| { |
| double power; |
| double factor; |
| double _utilization; |
| char powername[4096]; |
| static int bl_index = 0, blp_index = 0, bl_boost_index40 = 0, bl_boost_index80, bl_boost_index100; |
| |
| if (!bl_index) |
| bl_index = get_param_index("backlight"); |
| if (!blp_index) |
| blp_index = get_param_index("backlight-power"); |
| if (!bl_boost_index40) |
| bl_boost_index40 = get_param_index("backlight-boost-40"); |
| if (!bl_boost_index80) |
| bl_boost_index80 = get_param_index("backlight-boost-80"); |
| if (!bl_boost_index100) |
| bl_boost_index100 = get_param_index("backlight-boost-100"); |
| |
| power = 0; |
| factor = get_parameter_value(bl_index, bundle); |
| _utilization = get_result_value(r_index, result); |
| |
| power += _utilization * factor / 100.0; |
| |
| /* |
| * most machines have a non-linear backlight scale. to compensate, add a fixed value |
| * once the brightness hits 40% and 80% |
| */ |
| |
| if (_utilization >=99) |
| power += get_parameter_value(bl_boost_index100, bundle); |
| else if (_utilization >=80) |
| power += get_parameter_value(bl_boost_index80, bundle); |
| else if (_utilization >=40) |
| power += get_parameter_value(bl_boost_index40, bundle); |
| |
| factor = get_parameter_value(blp_index, bundle); |
| |
| if (!r_index_power) { |
| sprintf(powername, "%s-power", name); |
| r_index_power = get_result_index(powername); |
| } |
| _utilization = get_result_value(r_index_power, result); |
| |
| power += _utilization * factor / 100.0; |
| |
| return power; |
| } |