Re: [U-Boot] [PATCH v6 34/34] imx: add i.MX8QXP MEK board support

[Peng Fan]

> -----Original Message-----
> From: Fabio Estevam [mailto:feste...@gmail.com]
> Sent: 2018年11月7日 20:36
> To: Jon Nettleton <j...@solid-run.com>; Peng Fan <peng....@nxp.com>
> Cc: thar...@gateworks.com; Fabio Estevam <fabio.este...@nxp.com>;
> U-Boot-Denx <u-boot@lists.denx.de>
> Subject: Re: [U-Boot] [PATCH v6 34/34] imx: add i.MX8QXP MEK board support
> 
> + Peng
> 
> On Wed, Nov 7, 2018 at 4:58 AM Jon Nettleton <j...@solid-run.com> wrote:
> >
> > I have been spending some time on this, at least from the lpddr4 side.
> > There is a good amount of this that can be abstracted out and made
> > into general initialization routines.  This is all well and good and
> > you can see that Boundary Devices has already codified some of these
> > values here.
> > https://emea01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgit
> >
> hub.com%2Fboundarydevices%2Fu-boot-imx6%2Fblob%2Fboundary-v2018.07%
> 2Fb
> >
> oard%2Fboundary%2Fnitrogen8m%2Fddr%2Fddrphy_train.c&amp;data=02%7C
> 01%7
> >
> Cpeng.fan%40nxp.com%7C9ed74670423a422dd7f108d644ad89f0%7C686ea1d
> 3bc2b4
> >
> c6fa92cd99c5c301635%7C0%7C0%7C636771909469703915&amp;sdata=WJtl5
> C4Z5YU
> > GLLKZUV6AVfGYjwzFIc7GojsBS8S%2BMWg%3D&amp;reserved=0
> >
> > However after you generate the script from the spreadsheet you then
> > need to run it through a calibration routine, which is a Windows
> > program that takes the values from the spreadsheets and runs them
> > against the device and provides some tuned phy values based on the
> > device.  I don't see a good way to get around just having this chunk
> > of code be a board specific function that runs the register settings
> > that are spit out by the NXP tool.
> >
> > As for the initialization I am not sure how much changes depending if
> > the board is using DDR3, DDR4 or LPDDR4.  It would be great if we
> > could come up with some general direction on this and move things
> > forward.
> 
> Peng on Cc has been working on this and hopefully will be able to post a new
> series soon.

Yes, the related patches will be sent out after some test, should be soon.

Regards,
Peng.
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