linux-kernel - Re: [PATCH V6 4/5] phy: freescale: fsl-samsung-hdmi: Use closest divider

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Message-ID: <d99018f8-09a6-49eb-a054-e8605cb169ce@kontron.de>
Date: Thu, 5 Sep 2024 09:30:44 +0200
From: Frieder Schrempf <frieder.schrempf@...tron.de>
To: Adam Ford <aford173@...il.com>, linux-phy@...ts.infradead.org
Cc: dominique.martinet@...ark-techno.com, linux-imx@....com,
 festevam@...il.com, aford@...conembedded.com, Sandor.yu@....com,
 Vinod Koul <vkoul@...nel.org>, Kishon Vijay Abraham I <kishon@...nel.org>,
 Marco Felsch <m.felsch@...gutronix.de>, Lucas Stach
 <l.stach@...gutronix.de>, Uwe Kleine-König
 <u.kleine-koenig@...gutronix.de>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH V6 4/5] phy: freescale: fsl-samsung-hdmi: Use closest
 divider

On 05.09.24 1:30 AM, Adam Ford wrote:
> Currently, if the clock values cannot be set to the exact rate,
> the round_rate and set_rate functions use the closest value found in
> the look-up-table.  In preparation of removing values from the LUT
> that can be calculated evenly with the integer calculator, it's
> necessary to ensure to check both the look-up-table and the integer
> divider clock values to get the closest values to the requested
> value.  It does this by measuring the difference between the
> requested clock value and the closest value in both integer divider
> calucator and the fractional clock look-up-table.
> 
> Which ever has the smallest difference between them is returned as
> the cloesest rate.
> 
> Signed-off-by: Adam Ford <aford173@...il.com>
> Signed-off-by: Dominique Martinet <dominique.martinet@...ark-techno.com>

Reviewed-by: Frieder Schrempf <frieder.schrempf@...tron.de>
Tested-by: Frieder Schrempf <frieder.schrempf@...tron.de>