File indexing completed on 2024-06-16 05:05:12

 /*
     KWin - the KDE window manager
     This file is part of the KDE project.
 
     SPDX-FileCopyrightText: 2016 Roman Gilg <subdiff@gmail.com>
     SPDX-FileCopyrightText: 2021-2022 Xaver Hugl <xaver.hugl@gmail.com>
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 
 #include "drm_property.h"
 #include "drm_gpu.h"
 #include "drm_logging.h"
 #include "drm_object.h"
 #include <cerrno>
 
 namespace KWin
 {
 
 DrmProperty::DrmProperty(DrmObject *obj, const QByteArray &name, const QList<QByteArray> &enumNames)
     : m_obj(obj)
     , m_propName(name)
     , m_enumNames(enumNames)
 {
 }
 
 bool DrmProperty::setPropertyLegacy(uint64_t value)
 {
     if (m_current == value) {
         return true;
     } else if (drmModeObjectSetProperty(m_obj->gpu()->fd(), m_obj->id(), m_obj->type(), m_propId, value) == 0) {
         m_current = value;
         return true;
     } else {
         return false;
     }
 }
 
 void DrmProperty::update(DrmPropertyList &propertyList)
 {
     if (const auto opt = propertyList.takeProperty(m_propName)) {
         const auto &[prop, value] = *opt;
         m_propId = prop->prop_id;
         m_current = value;
         m_immutable = prop->flags & DRM_MODE_PROP_IMMUTABLE;
         m_isBlob = prop->flags & DRM_MODE_PROP_BLOB;
         m_isBitmask = prop->flags & DRM_MODE_PROP_BITMASK;
         if (prop->flags & DRM_MODE_PROP_RANGE) {
             Q_ASSERT(prop->count_values > 1);
             m_minValue = prop->values[0];
             m_maxValue = prop->values[1];
         }
         m_enumToPropertyMap.clear();
         m_propertyToEnumMap.clear();
         // bitmasks need translation too, not just enums
         if (prop->flags & (DRM_MODE_PROP_ENUM | DRM_MODE_PROP_BITMASK)) {
             for (int i = 0; i < prop->count_enums; i++) {
                 struct drm_mode_property_enum *en = &prop->enums[i];
                 int j = m_enumNames.indexOf(QByteArray(en->name));
                 if (j >= 0) {
                     if (m_isBitmask) {
                         m_enumToPropertyMap[1 << j] = 1 << en->value;
                         m_propertyToEnumMap[1 << en->value] = 1 << j;
                     } else {
                         m_enumToPropertyMap[j] = en->value;
                         m_propertyToEnumMap[en->value] = j;
                     }
                 }
             }
         }
         if (m_immutable && m_isBlob) {
             if (m_current != 0) {
                 m_immutableBlob.reset(drmModeGetPropertyBlob(m_obj->gpu()->fd(), m_current));
                 if (m_immutableBlob && (!m_immutableBlob->data || !m_immutableBlob->length)) {
                     m_immutableBlob.reset();
                 }
             } else {
                 m_immutableBlob.reset();
             }
         }
     } else {
         m_propId = 0;
         m_immutableBlob.reset();
         m_enumToPropertyMap.clear();
         m_propertyToEnumMap.clear();
     }
 }
 
 uint64_t DrmProperty::value() const
 {
     return m_current;
 }
 
 bool DrmProperty::hasAllEnums() const
 {
     return m_enumToPropertyMap.count() == m_enumNames.count();
 }
 
 uint32_t DrmProperty::propId() const
 {
     return m_propId;
 }
 
 const QByteArray &DrmProperty::name() const
 {
     return m_propName;
 }
 
 bool DrmProperty::isImmutable() const
 {
     return m_immutable;
 }
 
 bool DrmProperty::isBitmask() const
 {
     return m_isBitmask;
 }
 
 uint64_t DrmProperty::minValue() const
 {
     return m_minValue;
 }
 
 uint64_t DrmProperty::maxValue() const
 {
     return m_maxValue;
 }
 
 drmModePropertyBlobRes *DrmProperty::immutableBlob() const
 {
     return m_immutableBlob.get();
 }
 
 DrmObject *DrmProperty::drmObject() const
 {
     return m_obj;
 }
 
 bool DrmProperty::isValid() const
 {
     return m_propId != 0;
 }
 }