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Allow plane selection overrides using environment variables

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This commit is contained in:
Cameron Gutman 2026-01-05 21:27:11 -06:00
commit 0a58af4fa1
1 changed files with 19 additions and 0 deletions
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19
app/streaming/video/ffmpeg-renderers/drm.cpp
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@ -654,6 +654,15 @@ bool DrmRenderer::initialize(PDECODER_PARAMETERS params)
continue; continue;
} }
{
// Allow the user to override the plane selection logic
uint32_t userPlane;
if (Utils::getEnvironmentVariableOverride("DRM_VIDEO_PLANE", &userPlane) && userPlane != planeRes->planes[i]) {
drmModeFreePlane(plane);
continue;
}
}
// We don't check plane->crtc_id here because we want to be able to reuse the primary plane // We don't check plane->crtc_id here because we want to be able to reuse the primary plane
// that may owned by Qt and in use on a CRTC prior to us taking over DRM master. When we give // that may owned by Qt and in use on a CRTC prior to us taking over DRM master. When we give
// control back to Qt, it will repopulate the plane with the FB it owns and render as normal. // control back to Qt, it will repopulate the plane with the FB it owns and render as normal.
@ -756,6 +765,16 @@ bool DrmRenderer::initialize(PDECODER_PARAMETERS params)
continue; continue;
} }
{
// Allow the user to override the plane selection logic
uint32_t userPlane;
QString optionVarName = QString("DRM_OVERLAY_PLANE%1").arg(overlayIndex);
if (Utils::getEnvironmentVariableOverride(optionVarName.toUtf8(), &userPlane) && userPlane != planeRes->planes[i]) {
drmModeFreePlane(plane);
continue;
}
}
DrmPropertyMap props { m_DrmFd, planeRes->planes[i], DRM_MODE_OBJECT_PLANE }; DrmPropertyMap props { m_DrmFd, planeRes->planes[i], DRM_MODE_OBJECT_PLANE };
// Only consider overlay planes as valid targets // Only consider overlay planes as valid targets
if (auto type = props.property("type"); type->initialValue() != DRM_PLANE_TYPE_OVERLAY) { if (auto type = props.property("type"); type->initialValue() != DRM_PLANE_TYPE_OVERLAY) {