* DisplayLink UDL driver with Intel IOMMU enabled
@ 2020-01-13 16:29 Volker Vogelhuber
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From: Volker Vogelhuber @ 2020-01-13 16:29 UTC (permalink / raw)
To: dri-devel
I just came across a DMAR allocation issue when I wanted to use the UDL
driver with a DL-165 chipset and had the Intel IOMMU enabled.
It seems like it could be solved with the same patch already applied to
the EVDI driver:
https://github.com/DisplayLink/evdi/commit/74e289906dba95c0ad3208cfa6a57ba3042b930f
So just add interface->dev.archdata.iommu = INTEL_IOMMU_DUMMY_DOMAIN;
before the drm_dev_alloc call in udl_drv.c seems to be enough to use
the UDL driver with IOMMU enabled.
Kind regards,
Volker
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