Re: [PATCH v2 0/6] memory: renesas-rpc-if: Optimize transfer overhead and implement runtime PM autosuspend

Wolfram Sang <[email protected]> Mon, 27 Jul 2026 17:51:50 +0200

Newsgroups	org.kernel.vger.linux-renesas-soc,org.kernel.vger.linux-kernel
Message-ID	<amd-llbKq1t42NJY@ninjato>

Hi Prabhakar,

> This patch series optimizes the Renesas RPC-IF driver by significantly
> reducing software overhead in both the direct memory-mapped (dirmap) and
> manual transfer paths, maximizing transaction throughput, and introducing
> runtime PM autosuspend to prevent aggressive power gating during
> consecutive flash operations.

Sounds great. I want to test it on R-Car V4H SparrowHawk.

> These changes were benchmarked using flash_speed on the RZ/T2H EVK with
> xSPI0/1 interfaces operating in 1S-1S-1S mode for write operations:

'flash_speed' from mtd-utils, I assume. Did you use other options than
'-d' for testing writes?

Thanks and happy hacking,

   Wolfram

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