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backends/drm: allow up to two composited frames to be pending at the same time

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This should improve responsiveness on setups where rendering each frame takes longer
than the refresh cycle of the display.

BUG: 452119
CCBUG: 454098
This commit is contained in:
Xaver Hugl 2023-12-26 01:43:36 +01:00
parent 1e3d50e3ff
commit 40a9f08dd3
1 changed files with 4 additions and 0 deletions
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4
src/backends/drm/drm_output.cpp
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@ -36,6 +36,7 @@ namespace KWin
{
static const bool s_allowColorspaceIntel = qEnvironmentVariableIntValue("KWIN_DRM_ALLOW_INTEL_COLORSPACE") == 1;
static const bool s_disableTripleBuffering = qEnvironmentVariableIntValue("KWIN_DRM_DISABLE_TRIPLE_BUFFERING") == 1;
DrmOutput::DrmOutput(const std::shared_ptr<DrmConnector> &conn)
: DrmAbstractOutput(conn->gpu())
@ -44,6 +45,9 @@ DrmOutput::DrmOutput(const std::shared_ptr<DrmConnector> &conn)
{
m_pipeline->setOutput(this);
m_renderLoop->setRefreshRate(m_pipeline->mode()->refreshRate());
if (m_gpu->atomicModeSetting() && !s_disableTripleBuffering) {
m_renderLoop->setMaxPendingFrameCount(2);
}
Capabilities capabilities = Capability::Dpms | Capability::IccProfile;
State initialState;