[PATCH] interconnect: qcom: icc-rpmh: Add opt-out parameter for QoS settings

[Marc Zyngier]

On Mon, 07 Sep 2026 21:21:44 +0100,
Abel Vesa <abel.vesa at oss.qualcomm.com> wrote:
> 
> On 26-09-07 18:17:29, Marc Zyngier wrote:
> > Recent addition of QoS configuration to the X1 variants resulted in
> > systems that spontaneously reset at boot time or under load.
> > 
> > Given that this is both very unpleasant and hard to debug, give the
> > affected user the option to survive such event with a module parameter.
> > 
> > Passing "icc_rpmh.enable_qos=0" to the kernel command-line will skip the
> > offending QoS setup.
> > 
> 
> Lets not start doing this, please.
> 
> Can we figure out which platform deosn't work and then maybe we can 
> add a quirk in DT per platform?

We have at least 3 machines that are dysfunctional since [1] was
merged (mini-x, sp12 and devkit). Probably some more, but I'm not
going to be the one doing a survey.

What really should happen is [1] to be reversed until QC figures out a
set of parameters that actually works, instead of making this platform
even more unreliable than it already is.

Just like [2] should have been reverted.

Until then, we'll have to paper over this stuff.

	M.

[1] https://lore.kernel.org/all/20260527-x1e80100_qos-v2-2-305c6539e6d2@oss.qualcomm.com
[2] https://lore.kernel.org/all/20260203063244.1498699-1-xin.liu@oss.qualcomm.com

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