Re: [PATCH 0/6] arm64: dts: qcom: sc8280xp: set GPI DMA channels according to DSDT

[Icenowy Zheng <zhengxingda@iscas.ac.cn>]

在 2026-06-02二的 20:53 +0800，Pengyu Luo写道：
> On Tue, 02 Jun 2026 16:14:45 +0800, Icenowy Zheng
> <zhengxingda@iscas.ac.cn> wrote:
> > Some bugs of the GPI driver exhibits a fact that some GPI
> > interfaces
> > aren't available to HLOS, and accessing them leads to system stucks
> > /
> > resets [1] [2].
> > 
> > This patchset sets the DMA channel mask of sc8280xp device trees to
> > the
> > values indicated by the DSDTs of the corresponding devices.
> > 
> > As different devices seem to have different allowed DMA channels,
> > the
> > value in the SoC DTSI file is removed, to prevent new DTS's from
> > directly using these broken values.
> > 
> > [1] https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2142403
> > [2]
> > https://discussion.fedoraproject.org/t/fedora-43-44-beta-aarch64-wont-boot-on-thinkpad-x13s/183074/13
> > 
> 
> I don't focus on the upstream for a while, was this problem still
> here
> recently? Could you attach the base commit, so I can reproduce it.

I tested on v7.0.10 (with some extra patches, but not related to
sc8280xp).

It seems that raid456 module will lead to the hang because improper
usage of GPI DMA, and without it loaded it seems to be working fine.

Could you check whether you have any problems with CONFIG_MD_RAID456=y
set?

Thanks,
Icenowy

> About one months ago, gaokun3 worked well with Linux 7.0.0. I enabled
> i2c4(gpi_dma0, seid=4), spi6(gpi_dma0, seid=6), i2c15(gpi_dma1,
> seid=7)
> 
> I thought this commit should have fixed the issue in [1]
> https://lore.kernel.org/all/20251013115506.103649-1-mitltlatltl@gmail.com