drm_crtc.cpp

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/*
    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_commit.h"
#include "drm_gpu.h"
#include "drm_output.h"
#include "drm_pointer.h"
 
namespace KWin
{
 
DrmCrtc::DrmCrtc(DrmGpu *gpu, uint32_t crtcId, int pipeIndex, DrmPlane *primaryPlane, DrmPlane *cursorPlane)
    : DrmObject(gpu, crtcId, DRM_MODE_OBJECT_CRTC)
    , modeId(this, QByteArrayLiteral("MODE_ID"))
    , active(this, QByteArrayLiteral("ACTIVE"))
    , vrrEnabled(this, QByteArrayLiteral("VRR_ENABLED"))
    , gammaLut(this, QByteArrayLiteral("GAMMA_LUT"))
    , gammaLutSize(this, QByteArrayLiteral("GAMMA_LUT_SIZE"))
    , ctm(this, QByteArrayLiteral("CTM"))
    , degammaLut(this, QByteArrayLiteral("DEGAMMA_LUT"))
    , degammaLutSize(this, QByteArrayLiteral("DEGAMMA_LUT_SIZE"))
    , m_crtc(drmModeGetCrtc(gpu->fd(), crtcId))
    , m_pipeIndex(pipeIndex)
    , m_primaryPlane(primaryPlane)
    , m_cursorPlane(cursorPlane)
{
}
 
bool DrmCrtc::updateProperties()
{
    if (!m_crtc) {
        return false;
    }
    DrmPropertyList props = queryProperties();
    modeId.update(props);
    active.update(props);
    vrrEnabled.update(props);
    gammaLut.update(props);
    gammaLutSize.update(props);
    ctm.update(props);
    degammaLut.update(props);
    degammaLutSize.update(props);
 
    return !gpu()->atomicModeSetting() || (modeId.isValid() && active.isValid());
}
 
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;
}
 
void DrmCrtc::setCurrent(const std::shared_ptr<DrmFramebuffer> &buffer)
{
    m_currentBuffer = 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 (gammaLutSize.isValid() && gammaLutSize.value() <= 4096) {
            return gammaLutSize.value();
        }
    }
    return m_crtc->gamma_size;
}
 
DrmPlane *DrmCrtc::primaryPlane() const
{
    return m_primaryPlane;
}
 
DrmPlane *DrmCrtc::cursorPlane() const
{
    return m_cursorPlane;
}
 
void DrmCrtc::disable(DrmAtomicCommit *commit)
{
    commit->addProperty(active, 0);
    commit->addProperty(modeId, 0);
}
 
void DrmCrtc::releaseCurrentBuffer()
{
    if (m_currentBuffer) {
        m_currentBuffer->releaseBuffer();
    }
}
}