[U-Boot] [PATCH 4/9] ARM: socfpga: Bundle U-Boot fitImage into SFP on Arria10

Marek Vasut
2018-11-23T12:40:17Z

On 11/23/2018 10:54 AM, Chee, Tien Fong wrote:
> On Wed, 2018-11-21 at 15:21 +0100, Marek Vasut wrote:
>> On 11/21/2018 11:41 AM, tien.fong.chee at intel.com wrote:
>>>
>>> From: Tien Fong Chee <tien.fong.chee@intel.com>
>> Did you change Author:ship of the patch ?

I believe you did, so please fix that.

>>> Bundle U-Boot fitImage containing U-Boot and FPGA bitstream into
>>> the
>>> u-boot-with-spl.sfp on Arria10. This lets U-Boot operate in a very
>>> similar fashion to Gen5, where the U-Boot binary got loaded by the
>>> SPL from a uImage concatenated at the end of the SPL SFP image. On
>>> Gen10, the U-Boot is in fitImage which contains the FPGA bitstream
>>> as well. In this case, the SPL can load the FPGA bitstream first
>>> and
>>> load the U-Boot afterward in the same manner. This is nonetheless a
>>> stopgap measure until there is a proper firmware loader in U-Boot.
>> Right, this is a stopgap measure until FW loader is present. Why is
>> this
>> patch needed at all in this series ?
> This patch is cherry picked from the sdmmc_next custodian, so this
> patch is required for generating FIT image. I can remove the stopgap
> comment to avoid confusing.

But why is this patch needed at all ? You use the firmware loader to
load the FPGA bitstream. Where does the fitImage come into play ?

The fitImage was used to circumvent the missing FW loader, when I needed
to load multiple files (bitstream and u-boot binary). Now there is no
such requirement anymore, so the entire fitImage machinery is probably
not needed ?

--
Best regards,
Marek Vasut