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New ContributorLTPI IP - any plan to support OCP LTPI Revision 1.2? (MAX 10)
Hi,
We are planning to purchase the Altera LTPI IP, targeting MAX 10 (Quartus Prime Standard Edition).
The LTPI IP User Guide states the IP is compliant with OCP DC-SCM 2.1 LTPI revision 1.1, version 1.1 specifications.
Meanwhile the OCP LTPI reference implementation has moved to Revision 1.2 (release 1.20, 12 Dec 2025), which adds extended CRC/error handling with a new Frame Lost error, renames LTPI Version to LTPI Revision (CSR packages regenerated), and changes the Link Speed timeout and Link Lost conditions.
Is there a plan to update the LTPI IP to Revision 1.2?
Thanks.
5 Replies
Farabi_AlteraRegular Contributor
Hello,
On the current compliance baseline: the LTPI IP is compliant with OCP DC-SCM 2.1 LTPI revision 1.1, version 1.1 specifications, and for MAX 10 devices specifically, it supports up to 400 Mbps data rate for all speed grade configurations. LVDS Tunneling Protocol and Interface (LTPI) IP User Guide
On the Quartus Prime Standard Edition version that introduced MAX 10 support: LTPI IP v25.1 (Quartus Prime Standard Edition 25.1, dated 2025.11.03) added support for MAX 10 FPGAs. LVDS Tunneling Protocol and Interface (LTPI) IP v25.1
On the resource utilization reference: the LTPI IP resource utilization values for MAX 10 are obtained from Quartus Prime Standard Edition software version 25.1. LVDS Tunneling Protocol and Interface (LTPI) IP User Guide
Regarding the specific Revision 1.2 changes you mention — extended CRC/error handling, the new Frame Lost error, the LTPI Version → LTPI Revision rename, and the Link Speed timeout/Link Lost condition changes — none of those are documented in the available LTPI IP materials I have access to. I cannot confirm or deny a planned update.
- Farabi_Altera
Do you have further question?
vicHi,
This is the LTPI 1.2 specification and reference implementation information I found for your reference:https://github.com/opencomputeproject/HWMgmt-Module-DCSCM-LTPI
- Farabi_Altera
Based on the referenced materials, there is no publicly documented plan or timeline confirming that the Altera LTPI IP will be updated to OCP DC-SCM LTPI Revision 1.2.
The Altera documentation currently identifies the IP as compliant with LTPI Revision 1.1. The OCP reference implementation lists release 1.20, dated 12 December 2025, as compliant with LTPI Revision 1.2.
