linux-kernel - Re: [PATCH v2 1/1] i3c: master: svc: skip address resend on repeat START

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Message-ID: <877c2mmb9f.fsf@bootlin.com>
Date: Mon, 12 May 2025 11:25:16 +0200
From: Miquel Raynal <miquel.raynal@...tlin.com>
To: Frank Li <Frank.Li@....com>
Cc: Alexandre Belloni <alexandre.belloni@...tlin.com>,
  linux-i3c@...ts.infradead.org (moderated list:SILVACO I3C DUAL-ROLE
 MASTER),  imx@...ts.linux.dev (open list:SILVACO I3C DUAL-ROLE MASTER),
  linux-kernel@...r.kernel.org (open list)
Subject: Re: [PATCH v2 1/1] i3c: master: svc: skip address resend on repeat
 START

On 29/04/2025 at 01:42:34 -04, Frank Li <Frank.Li@....com> wrote:

> According to the I3C specification, address arbitration only happens during
> the START. Repeated START do not initiate arbitration, and In-Band
> Interrupts (IBIs) cannot occur at this stage.
>
> Resending the address upon a NACK in a repeat START is therefore redundant
> and unnecessary. Avoid redundant retries, improving efficiency and ensuring
> protocol compliance.
>
> Signed-off-by: Frank Li <Frank.Li@....com>
> ---

Reviewed-by: Miquel Raynal <miquel.raynal@...tlin.com>