Hi Peter,

On 14.08.19 14:07, Peter Robinson wrote:
> Hi Stefan,
>
> Firstly thanks for your work here.
>
>>>>> But there are also lot of hacks. Currently the biggest part on Kernel
>>>>> side is the PCIe driver which isn't upstreamed yet. Another problem is
>>>>> that there is no U-Boot support yet.
>>>> I figured as much, I had looked at the 4.19.y branch as I figured
>>>> that's where the initial bits would be but I hadn't seen anything that
>>>> stood out :-/
>>>>
>>>> I was looking through the DT compatible strings from
>>>> bcm2711-rpi-4-b.dtb and worked out the issues with the PCIe issue, I
>>>> figured there was either a new driver or enablement to one of the
>>>> other broadcom drivers, most of the rest looked like fairly generic
>>>> Arm IP or exisiting broadcom bits so my guess would there would be DT
>>>> plus probably some enablement bits for the new SoC to find.
>>> I will start to prepare an initial RFC series in the near future. But
>>> it's summer, so don't expect anything too soon.
>>>
>> Just a short update: it will be a bumpy road :-(
>>
>> The good news first: sdhci (incl. clk changes) and pinctrl are ready.
>>
>> But there is hassle with DMA especially with current Linux 5.3 rc. So in
>> case the initial series land for Linux 5.4, there will be only debug
>> UART and no graphics support. Also i'm currently not sure arm64 support
>> will be ready.
> Is there a tracking ticket for the changes that need to be made,
> issues etc.

BCM2711 / Raspberry Pi 4 support is too complex for a single ticket. I
decided to start with inital support (without GENET, thermal, HWRNG, USB
3.0, 40 bit DMA, V3D) and handle the advanced topics separate. But yes
there is a ticket for the initial support:

https://github.com/lategoodbye/rpi-zero/issues/43

>  I noticed you posted a v2 series this morning. Is the
> aarch64 issue the one with the dma32 problems or is there other issues
> as well?

Unfortunately they are completely different. Nicolas Saenz Julienne will
take care of them.

The good news: sdhci (without clock) and pinctrl changes has been merged
for Linux 5.4.

Stefan

>
> Peter
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