linux-kernel - Re: TI K3 AM69 Kernel Panic when PCIe Controller is Enabled

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Message-ID: <oawjd2mscz2untz6zc5mqn6ak2oxdul6pnaexiohe6ae3bow2r@afkvpu4izrvt>
Date: Wed, 5 Nov 2025 11:10:44 -0300
From: 
	João Paulo Gonçalves <jpaulo.silvagoncalves@...il.com>
To: Siddharth Vadapalli <s-vadapalli@...com>
Cc: Nishanth Menon <nm@...com>, Vignesh Raghavendra <vigneshr@...com>, 
	Kishon Vijay Abraham I <kishon@...com>, Swapnil Jakhade <sjakhade@...ence.com>, 
	Andrew Davis <afd@...com>, Francesco Dolcini <francesco@...cini.it>, 
	João Paulo Gonçalves <joao.goncalves@...adex.com>, linux-arm-kernel@...ts.infradead.org, 
	linux-kernel@...r.kernel.org
Subject: Re: TI K3 AM69 Kernel Panic when PCIe Controller is Enabled

Hi Siddharth,

> The E2E thread above leads to another one where the issue was claimed to be
> seen only with the usage of an external reference clock, and it was fixed
> with the usage of the internal reference clock. Does this hold true for the
> board that you are using as well?

No, we changed to use the internal reference clocks on the current
hardware revision (sent upstream on [1]) and still have the same issue.
Please look at the PCIe nodes in [1] so you can confirm this. For
example:

//file k3-am69-aquila.dtsi
/* Aquila PCIE_1 */
&pcie0_rc {
	pinctrl-names = "default";
	pinctrl-0 = <&pinctrl_pcie0_reset>;
	clocks = <&k3_clks 332 0>, <&serdes1 CDNS_TORRENT_REFCLK_DRIVER>;
	clock-names = "fck", "pcie_refclk";
	num-lanes = <2>;
	phy-names = "pcie-phy";
	phys = <&serdes1_pcie0_2l_link>;
	reset-gpios = <&main_gpio0 32 GPIO_ACTIVE_HIGH>;
	ti,syscon-acspcie-proxy-ctrl = <&acspcie1_proxy_ctrl 0x3>;
	status = "disabled";
};

[1] https://lore.kernel.org/lkml/20251104144915.60445-1-francesco@dolcini.it/

> Regards,
> Siddharth.

Best Regards,
João Paulo Gonçalves