Am 6. April 2025 01:31:49 UTC schrieb Guenter Roeck <li...@roeck-us.net>:
>On 4/5/25 12:28, Bernhard Beschow wrote:
>>
>>
>> Am 5. April 2025 17:26:14 UTC schrieb Guenter Roeck <li...@roeck-us.net>:
>>> On 4/5/25 07:25, Philippe Mathieu-Daudé wrote:
>>>> Hi Guenter,
>>>>
>>>> On 5/4/25 16:00, Guenter Roeck wrote:
>>>>> This series is needed to support the USB interface on imx8mp-evk when
>>>>> booting the Linux kernel.
>>>>>
>>>>> According to the XHCI specification, ERSTBA should be written in Low-High
>>>>> order. The Linux kernel writes the high word first. This results in an
>>>>> initialization failure.
>>>>>
>>>>> The following information is found in the Linux kernel commit log.
>>>>>
>>>>> [Synopsys]- The host controller was design to support ERST setting
>>>>> during the RUN state. But since there is a limitation in controller
>>>>> in supporting separate ERSTBA_HI and ERSTBA_LO programming,
>>>>> It is supported when the ERSTBA is programmed in 64bit,
>>>>> or in 32 bit mode ERSTBA_HI before ERSTBA_LO
>>>>>
>>>>> [Synopsys]- The internal initialization of event ring fetches
>>>>> the "Event Ring Segment Table Entry" based on the indication of
>>>>> ERSTBA_LO written.
>>>>>
>>>>> Add property to support writing the high word first. Enable it
>>>>> for dwc3.
>>>>>
>>>>> ----------------------------------------------------------------
>>>>> Guenter Roeck (2):
>>>>> hw: usb: xhci: Add property to support writing ERSTBA in high-low
>>>>> order
>>>>> hw/usb/hcd-dwc3: Set erstba-hi-lo property
>>>>
>>>> What about using .impl.min_access_size = 8 instead?
>>>>
>>>> Could you try this patch, or provide me with a reproducer?
>>>>
>>>
>>> You should find everything you need to reproduce the problem at
>>
>> Hi Guenter,
>>
>> thanks for testing the new board, much appreciated.
>>
>
>In this context: Did you get the PCIe interface to work ?
>It instantiates for me, but interrupts don't get through.
>This is with the latest Linux kernel.
Yeah, it works with Buildroot as described in the handbook. When I append
`-netdev user,id=net0 -device virtio-net-pci,netdev=net0` on the cli I can
`wget http://www.google.com` successfully. When I omit it there is no network
connectivity. This is with a 6.6.23 vendor kernel.
However, even with your USB patches applied, PCIe and USB are non-functional on
the latest aarch64 Arch Linux kernel (v6.14 [1]):
[ 21.102444] platform 32f10108.usb: deferred probe pending: platform:
supplier 32f10000.blk-ctrl not ready
[ 21.102914] platform 32f00000.pcie-phy: deferred probe pending: platform:
supplier 32f10000.blk-ctrl not ready
I suspect that some bits need to indicate stable PLLs or similar, but that
needs further investigation.
Best regards,
Bernhard
[1] <https://archlinuxarm.org/packages/aarch64/linux-aarch64>
>
>Thanks,
>Guenter
>
