[Letux-kernel] build log :)

[H. Nikolaus Schaller]

>> 
>> Here is the tree:
>> 
>> http://git.goldelico.com/?p=gta04-kernel.git;a=shortlog;h=refs/heads/work/hns/gpu/pvr-v2
> 
> I have looked a little into the DM3730 TRM and it appears as if the power domain
> and reset registers are well documented.
> 
> For example the PM_PWSTST_SGX @ 0x4830 6BE4 should tell something about the
> power state of the SGX module.
> 
> CM_FCLKEN_SGX @ 0x4800 4B00 and CM_ICLKEN_SGX @ 0x4800 4B10 tell if the clocks are enabled.
> 
> CM_IDLEST_SGX @ 0x4800 4B20 should tell if theSGX is active or in standby.
> 
> Finally RM_RSTST_SGX @ 0x4830 6B58 should say something about the reset state.
> 
> And section 8.2.1.2 explicitly says:
> 
> "Software controls the release of SGX_RST using the PRCM.RM_RSTCTRL_SGX[0] SGX_RST bit."
> 
> All these registers can be inspected by devmem2. And even written...
> 
> I am quite sure that we have all information we need to fix the SGX reset control.
> Then I hope the SGX starts up.

I did look a little deeper into the code and the warnings and there is a second problem.

There is no OMAP reset-controller driver but the reset-controller framework assumes
to have properly defined device tree nodes for all resets. E.g. reset_control_get()
looks explicitly for a "resets = " property which we likely have to define for the sgx DT
node.

There was a patch set a while ago but it appears to have not been rejected or accepted:

http://lists.infradead.org/pipermail/linux-arm-kernel/2015-September/372314.html

So I will ask Tero Kristo what happened to it.
BR,
Nikolaus