[U-Boot] [PATCH 0/7] rockchip: Split sdram common function into sdram_common.c

[Dr. Philipp Tomsich]

Heiko & Kever,

just a quick update (to avoid any duplication of effort)…

We have implemented DRAM initialisation in UBoot/SPL for the RK3368-uQ7
already, but it will be a few more days before we can provide patches (the SPL
stage is hopelessly large once we MMC support in SPL is enabled … so this
first needs back-to-bootrom working).

The first drop from our side will be 32bits, dual-rank — auto-detection of ranks
and width will come in later, once I receive modified hardware (i.e. (a) with CS1
held high; (b) with half the memory removed for 16bit mode) from my colleagues.

Regards,
Philipp.

> On 13 Jun 2017, at 12:47, Kever Yang <kever.yang at rock-chips.com> wrote:
> 
> Heiko,
> 
> 
> On 06/13/2017 06:04 PM, Heiko Stübner wrote:
>> Am Dienstag, 13. Juni 2017, 11:31:53 CEST schrieb Dr. Philipp Tomsich:
>>> Kever,
>>> 
>>> thanks a lot! I had just started to work on RK3368 SPL code and the DDR
>>> controller would have been next on the list…
>>> You saved me quite a bit of work there.
>> Although the sdram drivers for rk3328 and rk3368 only seem to provide the
>> non-spl portions for now.
>> 
>> Kever, is there a rough time estimate for spl support for these socs?
> 
> No, I would like to provide them ASAP, but I don't get enough hands now :(
> so I decide to make the U-Boot recognize correct DRAM size first which is the
> most important.
>> (Got a rk3328-rock64 sample yesterday, so would be interested on getting
>> a mainline u-boot to run on it)
> 
> You can run mainline u-boot now already, just need to using Rockchip
> loader instead of SPL before U-Boot.
> 
> Thanks,
> - Kever
>