linux-kernel - Re: [PATCH v2] scsi: ufs: Allow RTT negotiation

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Message-ID: <ea63de370bc984f77d5635f3d76ad43d1c8b2b3b.camel@mediatek.com>
Date: Mon, 13 May 2024 11:57:42 +0000
From: Peter Wang (王信友) <peter.wang@...iatek.com>
To: "Avri.Altman@....com" <Avri.Altman@....com>, "martin.petersen@...cle.com"
	<martin.petersen@...cle.com>
CC: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	CC Chou (周志杰) <cc.chou@...iatek.com>,
	Alice Chao (趙珮均) <Alice.Chao@...iatek.com>,
	"beanhuo@...ron.com" <beanhuo@...ron.com>, "bvanassche@....org"
	<bvanassche@....org>, Tun-yu Yu (游敦聿)
	<Tun-yu.Yu@...iatek.com>, "linux-scsi@...r.kernel.org"
	<linux-scsi@...r.kernel.org>, Chun-Hung Wu (巫駿宏)
	<Chun-hung.Wu@...iatek.com>, Naomi Chu (朱詠田)
	<Naomi.Chu@...iatek.com>, Powen Kao (高伯文)
	<Powen.Kao@...iatek.com>
Subject: Re: [PATCH v2] scsi: ufs: Allow RTT negotiation

On Mon, 2024-05-13 at 10:38 +0000, Avri Altman wrote:
>  	 
> External email : Please do not click links or open attachments until
> you have verified the sender or the content.
>  > >
> > > +     hba->nortt = FIELD_GET(MASK_NUMBER_OUTSTANDING_RTT, hba-
> > > >capabilities) + 1;
> > >
> > 
> > Hi Arvi.
> > 
> > Get nortt from NUTRS will have problem in mediatek platform.
> Not sure I follow - nortt has its own slot in the host capabilities -
> MASK_NUMBER_OUTSTANDING_RTT.
> 
> Thanks,
> Avri
> 

Hi Avri,

Sorry, NORTTS value still cannot direct use in mediatek platform.
Hope we can have ops to set real host RTTs.

Thanks.
Peter




> > The NUTRS in medatek platfrom is 32 or 64, but actually host rtt
> support is
> > only 2.
> > Please add new vops for host the set real rtt support.
> > 
> > Thanks.
> > Peter
> > 
> 
>