Revert "ARM: socfpga: Remove socfpga_sdram_apply_static_cfg()

[Ralph Siemsen <ralph.siemsen@linaro.org>]

Hi Wolfgang et al.,

On Fri, Aug 07, 2020 at 05:49:13PM +0200, Wolfgang Grandegger wrote:
>
>
>Am 07.08.20 um 17:05 schrieb Dinh Nguyen:
>>
>> On 8/6/20 7:36 AM, Wolfgang Grandegger wrote:
>>> Am 06.08.20 um 13:04 schrieb Marek Vasut:
>>>> On 8/6/20 12:53 PM, Wolfgang Grandegger wrote:
>>>>> This reverts commit c5f4b805755912a3d2fe20f014b6b6ab0473bd73.
>>>>>
>>>>> Conflicts:
>>>>> 	arch/arm/mach-socfpga/misc_gen5.c
>>>>>
>>>>> Without socfpga_sdram_apply_static_cfg(), the system hangs when Linux
>>>>> calls altvipfb2_start_hw() of the Intel Video and Image Processing(VIP)
>>>>> Frame Buffer II driver (drivers/video/fbdev/altvipfb2.c)
>>>>
>>>> There is no such driver in mainline U-Boot or Linux.
>>>
>>> It's a simple frame buffer driver from linux-socfpga for the IP core
>>> Intel Video and Image Processing(VIP) Frame Buffer II.

Just a note that I am seeing the same problem, also on Cyclone V, but 
with a different IP block in the FPGA. I'm using the Altera/Intel triple 
speed Ethernet, which is supported by drivers/net/altera_tse.c driver.

With earlier u-boot (tested 2018.03) it worked fine. But with 2020.04 
and 2020.07 the system hangs as soon as I do "ifconfig eth0 up". This 
only happens on cold boot; on warm reboot the eth0 port works fine. 

Reverting c5f4b805755912a3d2fe20 fixes the problem.

Regards,
Ralph