File indexing completed on 2025-04-20 10:57:33

 /*
     KWin - the KDE window manager
     This file is part of the KDE project.
 
     SPDX-FileCopyrightText: 2016 Roman Gilg <subdiff@gmail.com>
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 #include "drm_crtc.h"
 #include "drm_backend.h"
 #include "drm_buffer.h"
 #include "drm_gpu.h"
 #include "drm_logging.h"
 #include "drm_output.h"
 #include "drm_pointer.h"
 #include <cerrno>
 
 namespace KWin
 {
 
 DrmCrtc::DrmCrtc(DrmGpu *gpu, uint32_t crtcId, int pipeIndex, DrmPlane *primaryPlane, DrmPlane *cursorPlane)
     : DrmObject(gpu, crtcId, {PropertyDefinition(QByteArrayLiteral("MODE_ID"), Requirement::Required), PropertyDefinition(QByteArrayLiteral("ACTIVE"), Requirement::Required), PropertyDefinition(QByteArrayLiteral("VRR_ENABLED"), Requirement::Optional), PropertyDefinition(QByteArrayLiteral("GAMMA_LUT"), Requirement::Optional), PropertyDefinition(QByteArrayLiteral("GAMMA_LUT_SIZE"), Requirement::Optional), PropertyDefinition(QByteArrayLiteral("CTM"), Requirement::Optional)}, DRM_MODE_OBJECT_CRTC)
     , m_crtc(drmModeGetCrtc(gpu->fd(), crtcId))
     , m_pipeIndex(pipeIndex)
     , m_primaryPlane(primaryPlane)
     , m_cursorPlane(cursorPlane)
 {
 }
 
 bool DrmCrtc::init()
 {
     if (!m_crtc) {
         return false;
     }
     return initProps();
 }
 
 void DrmCrtc::flipBuffer()
 {
     m_currentBuffer = m_nextBuffer;
     m_nextBuffer = nullptr;
 }
 
 drmModeModeInfo DrmCrtc::queryCurrentMode()
 {
     m_crtc.reset(drmModeGetCrtc(gpu()->fd(), id()));
     return m_crtc->mode;
 }
 
 int DrmCrtc::pipeIndex() const
 {
     return m_pipeIndex;
 }
 
 std::shared_ptr<DrmFramebuffer> DrmCrtc::current() const
 {
     return m_currentBuffer;
 }
 
 std::shared_ptr<DrmFramebuffer> DrmCrtc::next() const
 {
     return m_nextBuffer;
 }
 
 void DrmCrtc::setCurrent(const std::shared_ptr<DrmFramebuffer> &buffer)
 {
     m_currentBuffer = buffer;
 }
 
 void DrmCrtc::setNext(const std::shared_ptr<DrmFramebuffer> &buffer)
 {
     m_nextBuffer = buffer;
 }
 
 int DrmCrtc::gammaRampSize() const
 {
     if (gpu()->atomicModeSetting()) {
         // limit atomic gamma ramp to 4096 to work around https://gitlab.freedesktop.org/drm/intel/-/issues/3916
         if (auto prop = getProp(PropertyIndex::Gamma_LUT_Size); prop && prop->current() <= 4096) {
             return prop->current();
         }
     }
     return m_crtc->gamma_size;
 }
 
 DrmPlane *DrmCrtc::primaryPlane() const
 {
     return m_primaryPlane;
 }
 
 DrmPlane *DrmCrtc::cursorPlane() const
 {
     return m_cursorPlane;
 }
 
 void DrmCrtc::disable()
 {
     setPending(PropertyIndex::Active, 0);
     setPending(PropertyIndex::ModeId, 0);
 }
 
 void DrmCrtc::releaseBuffers()
 {
     if (m_nextBuffer) {
         m_nextBuffer->releaseBuffer();
     }
     if (m_currentBuffer) {
         m_currentBuffer->releaseBuffer();
     }
 }
 }