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From: Wolfram Sang <wsa+renesas@sang-engineering.com>
To: Prabhakar <prabhakar.csengg@gmail.com>
Cc: Krzysztof Kozlowski <krzk@kernel.org>,
	linux-kernel@vger.kernel.org, linux-renesas-soc@vger.kernel.org,
	Prabhakar <prabhakar.csengg+renesas@gmail.com>,
	Biju Das <biju.das.jz@bp.renesas.com>,
	Fabrizio Castro <fabrizio.castro.jz@renesas.com>,
	Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Subject: Re: [PATCH v2 0/6] memory: renesas-rpc-if: Optimize transfer overhead and implement runtime PM autosuspend
Date: Mon, 27 Jul 2026 17:51:50 +0200	[thread overview]
Message-ID: <amd-llbKq1t42NJY@ninjato> (raw)
In-Reply-To: <20260727103449.3188105-1-prabhakar.mahadev-lad.rj@bp.renesas.com>

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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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  parent reply	other threads:[~2026-07-27 15:51 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-07-27 10:34 [PATCH v2 0/6] memory: renesas-rpc-if: Optimize transfer overhead and implement runtime PM autosuspend Prabhakar
2026-07-27 10:34 ` [PATCH v2 1/6] memory: renesas-rpc-if: Mark XSPI_CDD1BUF0 as volatile Prabhakar
2026-07-27 10:34 ` [PATCH v2 2/6] memory: renesas-rpc-if: Move static bridge configurations out of dirmap hot paths Prabhakar
2026-07-27 10:34 ` [PATCH v2 3/6] memory: renesas-rpc-if: Consolidate XSPI_CDTBUF0 updates in write path Prabhakar
2026-07-27 10:34 ` [PATCH v2 4/6] memory: renesas-rpc-if: Consolidate XSPI_CDTBUF0 updates in read path Prabhakar
2026-07-27 10:34 ` [PATCH v2 5/6] memory: renesas-rpc-if: Consolidate command setup register programming Prabhakar
2026-07-27 10:34 ` [PATCH v2 6/6] memory: renesas-rpc-if: Use runtime PM autosuspend after transfers Prabhakar
2026-08-03  7:33   ` Wolfram Sang
2026-08-03  9:07     ` Lad, Prabhakar
2026-07-27 15:51 ` Wolfram Sang [this message]
2026-07-27 17:58   ` [PATCH v2 0/6] memory: renesas-rpc-if: Optimize transfer overhead and implement runtime PM autosuspend Lad, Prabhakar

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