[Openpvrsgx-devgroup] DDK 1.17 on S5PV210

[H. Nikolaus Schaller]

Hi Jonathan,

> Am 09.04.2020 um 17:52 schrieb Jonathan Bakker <xc-racer2 at live.ca>:
> 
> Hi Nikolaus,
> 
> On 2020-04-09 5:27 a.m., H. Nikolaus Schaller wrote:
>> Hi Jonathan,
>> 
>> 
>> I have included it now and this defines "samsung,s5pv210-sgx540-120".
> 
> Awesome, thanks.
> 
>> 
>> One thing we should check is which sgx revision the hardware reports.
>> We have found that the jz4780 and the a83 are different from what
>> I have assumed so far.
>> 
>> So please can you check the silicon which version it does report?
>> 
>> You should try to dump (devmem2?) the registers at
>> 
>> 0xf3000020	VERSION
>> 0xf3000024	REVISION
>> 
>> VERSION should be 0x01140000 for an sgx540
>> and REVISION should be 0x00010200 for -120.
>> 
>> For this it should suffice to load the pvrsrvkm.
>> 
>> Here is what the jz4780 CI20 board reports:
>> 
>> 0x13040020 01140000 SGX_CORE_VERSION
>> 0x13040024 00010300 SGX_CORE_REVISION
>> 
>> i.e. it is an sgx540-130.
>> 
>> The SGX_CORE_REVISION isn't used much by the driver
>> code, except for turning on/off some errata. So I
>> hope the driver works equally well.
> 
> It is indeed an sgx540-120:
> 
> samsung-aries:~$ sudo ./busybox devmem 0xf3000020

Ah, busybox has a "devmem" built in? Good to know...


> 0x01140000
> samsung-aries:~$ sudo ./busybox devmem 0xf3000024
> 0x00010200

Great. Then we have it verified.

> 
> 
>> 
>> BR and thanks,
>> Nikolaus
>> 
> 
> Thanks,
> Jonathan

BR and thanks for testing,
Nikolaus