[U-Boot] FPGA detection failure on Cyclone V soc development kit

[Måns Rullgård]

Chin Liang See <clsee at altera.com> writes:

> On Fri, 2016-01-22 at 10:35 -0600, Dinh Nguyen wrote:
>> On 01/21/2016 10:31 AM, Marek Vasut wrote:
>> > On Thursday, January 21, 2016 at 05:20:33 PM, Måns Rullgård wrote:
>> > > Tom Rini <trini at konsulko.com> writes:
>> > > > On Wed, Jan 20, 2016 at 08:31:30PM +0000, Måns Rullgård wrote:
>> > > > > I'm having a problem with u-boot 2016.01 failing to detect
>> > > > > the FPGA on my Altera Cyclone V SoC Development Kit.  On
>> > > > > startup, it simply prints "FPGA: Not Altera chip ID" (the ID
>> > > > > having been read as all -zero).  No amount of messing with
>> > > > > jumpers or switches makes a difference.  The software on the
>> > > > > SD card included in the box appears to work, so on a whim I
>> > > > > took the SPL pre-loader from this card and combined it with
>> > > > > the main 2016.01 u-boot.  This makes the detection succeed,
>> > > > > despite Marek baulking at this idea.  The "good" SPL
>> > > > > identifies as "U-Boot SPL 2013.01.01 (Dec 04 2014 -
>> > > > > 08:59:41)" which is a different build date than the main
>> > > > > u-boot on the same SD card, so which source code version it
>> > > > > was built from is anyone's guess.
>> > > > > 
>> > > > > What's interesting is that Marek's board works with u-boot
>> > > > > 2016.01 while mine fails even with the very same binary.
>> > > > > The boards are different revisions (his 100-0321003-C1, mine
>> > > > > -E1), and the main Cyclone V chips are also different (his
>> > > > > 5CSXFC6D6F31C8NES, mine 5CSXFC6D6F31C6N).
>> > > > > 
>> > > > > Any suggestions for what to try next?
>> > > >  v2016.01 release or to of tree?  If top of tree, try
>> > > > http://patchwork.ozlabs.org/patch/570009/
>> > >  Tried release, top of tree, and top of tree with that patch.
>> > > Nothing works.
>
> Both part number is different in speed grade. This is first time I
> heard about this issue. A quick suspect might due to clock. Can you
> try to copy pll_config.h that is passing (from 2013.01.01) and replace
> the one in 2016?

That doesn't work at all.  Now it fails to detect the FPGA, then hangs
after printing the amount of DRAM.

-- 
Måns Rullgård