Re: [PATCH v5 0/2] Configure root port MPS during host probing
From: Niklas Cassel <cassel@kernel.org>
Date: 2025-09-02 08:33:22
Also in:
linux-amlogic, linux-pci, linux-rockchip, lkml
On Fri, Jun 20, 2025 at 11:55:05PM +0800, Hans Zhang wrote:
Current PCIe initialization exhibits a key optimization gap: Root Ports may operate with non-optimal Maximum Payload Size (MPS) settings. While downstream device configuration is handled during bus enumeration, Root Port MPS values inherited from firmware or hardware defaults often fail to utilize the full capabilities supported by controller hardware. This results in suboptimal data transfer efficiency throughout the PCIe hierarchy.
(snip) Gentle ping.