[U-Boot] [PATCH] driver/ddr/fsl: Force enabling parity for A-009803

Shengzhou Liu
2016-05-24T05:15:35Z

> -----Original Message-----
> From: York Sun [mailto:york.sun at nxp.com]
> Sent: Monday, May 23, 2016 11:33 PM
> To: Shengzhou Liu <shengzhou.liu@nxp.com>; u-boot at lists.denx.de
> Subject: Re: [PATCH] driver/ddr/fsl: Force enabling parity for A-009803
> Shengzhou,
>
> My point is you should force ap=1. Do you mean if ERRATUM_A009803 is
> enabled, users are forced to use address parity? That doesn't sound right.
> We have been running UDIMM without address parity for a long time.
>
> York
>
York,
My understanding is that ERRATUM_A009803 may still happen whatever ap_en is enabled or disabled.
To apply the workaround of A009803, it requires ap_en is enabled. Is your understanding that if we
disable ap_en, ERRATUM_A009803 will never happen? The CE document doesn't explain clearly this.
In last mail, did you mean we should force ap_en = 0 in case of A-009803?

Shengzhou