[PATCH] board: tbs2910: Add support for generic distro configuration

[Soeren Moch]

On 28.01.20 18:02, Denis 'GNUtoo' Carikli wrote:
> On Sun, 26 Jan 2020 01:40:13 +0100
> Soeren Moch <smoch at web.de> wrote:
>>> Ahh ok, now I understand. That probably explains the repeated size
>>> issues.
>> Why? With SPL+u-boot proper it would be even worse, since then there
>> is a gap between SPL and u-boot, u-boot starts at higher address in
>> eMMC, and it would not be smaller. And this 2-stage boot would break
>> the documented u-boot update procedure, since we have to flash 2
>> files then.
> I assumed that in some conditions, the bootrom could load only the SPL
> in sram. Once loaded, the SPL would initialize the RAM, detect the boot
> media, and fetch u-boot.img from it, and execute it.
It is different here. i.MX6Q boot rom loads a imx file. This initializes
the DDR controller first, then loads the executable payload, u-boot.bin
in this case. So there is no restriction from SRAM size, as long as the
DDR settings are fixed, what is the case for tbs2910.
>
> I also hoped the the SPL would have been significantly smaller than the
> current u-boot.imx image.
It would be. But then you need the u-boot.bin in addition to the SPL.imx
, with all the problems explained earlier.
>
> In the meantime, I'll send a v2 with some additional patches to reduce
> the size of the resulting u-boot.imx.
As already explained, this is not necessary now.

Soeren
>
> Denis.