[PATCH] arm:dts:k3-am64-sk: EMIF tool update to 0.8.0 with 1333MTs for lpddr4

[Tom Rini]

On Mon, Nov 29, 2021 at 05:34:49PM +0530, Sinthu Raja wrote:

> From: Sinthu Raja <sinthu.raja at ti.com>
> 
> EMIF tool for AM64 SK is now updated to 0.8.0 that includes
> * disabled Write DQ training
> * improve CA ODT to 60 ohms
> 
> The lpddr4 enabled with periodic WDQ training is causing periodic 26us
> stall. This makes the SoC stall without doing anything which leads to
> R5 interrupt latency in TCM memory. Due to this periodic training there
> are some outstanding CPU transactions waiting for the lpddr4 to complete.
> 
> Hence, disable the periodic write DQ training during the
> non-initialization stage of lpddr4 which results in an approximate 1us
> stall. Also, update the lpddr4 config to improve CA ODT by 60 ohms
> 
> The rationales are as follows:
> - PI_WDQLVL_EN: 2 Bits register field to support write DQ leveling,
>   disable bit 1 that supports Write DQ during non-initialization to
>   avoid ~26us stall during code execution.
> 
> - MR11_DATA_F1/F2_x register fields value changed to 0x66 that changes
>   the CA ODT from 48ohm to 60ohm to improve the eye margin on CA bus by
>   increasing the signal swing.
> 
> Signed-off-by: James Doublesin <doublesin at ti.com>
> Signed-off-by: Sinthu Raja <sinthu.raja at ti.com>

Applied to u-boot/master, thanks!

-- 
Tom
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