09:05 <indy> hi all, is j722s (soc in beagley-ai) capable running in pcie endpoint?

14:19 <bryanb> indy: i haven't tried personally but it should be. if rc mode works ep should as well

14:27 <indy> bryanb, i have it working in rc mode but quite old kernel (6.1)

14:28 <indy> trm for j722s is quite shrinked compared to j721e

14:29 <indy> but according vid:did from excel it is same like in j721e

14:48 <NishanthMenon> Dual mode of operation: Root Complex (RC) or End Point (EP) per page 1611 https://www.ti.com/lit/zip/sprujb3

14:49 <NishanthMenon> you might need an overlay on the lines of j784s4 or j721e though..

15:07 <indy> NishanthMenon, thanks, i'll check it

15:10 <NishanthMenon> indy: if you need a hint arch/arm64/boot/dts/ti/k3-j721e-evm-pcie0-ep.dtso could help

15:13 <indy> i have that on beaglebone ai-64 and it works, but there i have 6.6 kernel, on j722s (debian image from beaglebone for beagley-ai) i had out-of-box success only with 6.1 image

15:17 <NishanthMenon> aah - i only work on upstream kernel (master and next), unfortunately.. I am not sure what is going on on other kernel revs.. though I see https://www.beagleboard.org/distros seems to indicate a 2025-03 xfce image which seems to be based on 6.6 kernel. you might want to clarify on the beagle discord channel

16:29 <indy> NishanthMenon, any config/buildroot whatever to start play with? :)

16:32 <indy> in other words, what works? i have on beagley-ai with 6.1 imx219-83 stereo camera

16:34 <indy> on beagle distro, when i install using apt latest ti-kernel, i get useless system as there is problem with dma

16:35 <indy> not working csi/dsi/network/pci

16:40 <NishanthMenon> might be good to report to the discord :(

18:12 <NishanthMenon> indy: from rcn-nee in discord " yeah, 6.1.x-ti is best on beagley-ai... 6.6.x-ti had broken display.. gonna start testing 6.12.x-ti ..."

18:17 <rcn-ee_> @indy still around? 6.1.x-ti is our full feature version, an apt update/upgrade should keep you on the 6.1.x branch.. 6.6.x-ti, some things worked.. now that PB2 is out i'm retesting everything on v6.12.x-ti again.

18:19 <indy> NishanthMenon, rcn-ee_ i'm working with pcie and csi, headless

18:20 <indy> playing with endpoint

18:21 <rcn-ee_> pcie, we have a pin in v6.1.x-ti should be modeled as a regulator. trying to remember of j722s pcie is upstreawm

18:23 <indy> i'm looking at cadence as module, i would like to play with out-of-tree modules

18:23 <indy> as debian/armbian has some builtin disabled

18:25 <rcn-ee_> looks like it uses `j721e-pcie-host f102000.pcie` as-is.. are you trying mainline or what is your target kernel branch?

18:26 <rcn-ee_> mainline v6.13.x added j722S support for pcie we would need on beagley-ai

18:27 <rcn-ee_> so for mainline we can now add teh pcie nodes and the gpio detection/regulator (rpi cable spec)

18:29 <rcn-ee_> beagley-ai pci pins: https://openbeagle.org/beagleboard/BeagleBoard-DeviceTrees/-/blob/v6.1.x-Beagle/src/arm64/ti/k3-am67a-beagley-ai.dts?ref_type=heads#L771-777

18:29 <indy> rcn-ee_, target branch is at least 6.12.y :)

18:29 <rcn-ee_> this pin can be a regulator... https://openbeagle.org/beagleboard/BeagleBoard-DeviceTrees/-/blob/v6.1.x-Beagle/src/arm64/ti/k3-am67a-beagley-ai.dts?ref_type=heads#L1223

18:30 <rcn-ee_> @indy okay, ti's 6.12.y.. i just finished (do we really ever finish) PocketBeagle2's launch... i've been moving all aarch to v6.12.x-ti, beagley-ai is my next target..

18:32 <rcn-ee_> so ti 6.12.x has pcie support... https://git.ti.com/gitweb?p=ti-linux-kernel/ti-linux-kernel.git;a=history;f=drivers/pci/controller/cadence;hb=refs/heads/ti-linux-6.12.y should just be a device-tree update for beagley-ai to make pcie work.

20:03 <indy> rcn-ee_, are enabled _EP configs or only for _HOST in ti-rt kernel (also non-rt)?

20:06 <rcn-ee_> i'm not planning todo a 'rt' kernel for 6.12.x for beagleboard now that rt is enabled, it's mostly enabled, but full rt can be enabled as a boot arg

20:07 <rcn-ee_> (enabled - mostly mainline...)

20:08 <rcn-ee_> which _EP configs are you looking at enabling?

20:11 <indy> CONFIG_PCIE_CADENCE_EP=y

20:11 <indy> CONFIG_PCI_J721E_EP=y

20:11 <indy> in armbian are enabled also CONFIG_PCIE_DW_EP CONFIG_PCIE_DW_PLAT_EP CONFIG_PCI_KEYSTONE_EP

20:17 <indy> rcn-ee_, i recall some note from steven rostedt on linkedin or social.kernel.org regarding non-rt applications are very slow without rt patch after 'ceremony' where tglx passed 'golden' merge request

20:21 <rcn-ee_> https://www.irccloud.com/pastebin/hnlLNkYx/

20:25 <rcn-ee_> ci running. https://openbeagle.org/RobertCNelson/ti-linux-kernel-dev/-/jobs/55020

20:30 <indy> i can't recall details on which patch is missing in 6.6+ kernels

20:31 <rcn-ee_> i think it's the enable..

20:31 <rcn-ee_> device-tree looks fine.. https://openbeagle.org/beagleboard/BeagleBoard-DeviceTrees/-/blob/v6.6.x-Beagle/src/arm64/ti/k3-am67a-beagley-ai.dts?ref_type=heads#L1226

20:36 <rcn-ee_> @indy here is the patch from v6.1.x (really should change it to a regulator..)

20:36 <rcn-ee_> https://www.irccloud.com/pastebin/l2la4BLL/

21:05 <indy> yes it that one