TMDS64GPEVM: AM64X PCIe end-point

Hi,

Thanks for reporting the issue, we also just discovered the incomplete documentation a couple weeks ago and a ticket has been filed to our Dev team to get the issue fixed.

Meanwhile please refer the PCIe endpoint document for J7 devices:

https://software-dl.ti.com/jacinto7/esd/processor-sdk-linux-jacinto7/08_02_00_03/exports/docs/linux/Foundational_Components/Kernel/Kernel_Drivers/PCIe/PCIe_End_Point.html

not works for AM6442.

what do you mean by "not working"?

I mean, did everyting in SDK J7 but endpoint not booting up

EP device is frozen.

U-Boot SPL 2021.01-g44a87e3ab8 (May 05 2022 - 17:45:29 +0000)
SYSFW ABI: 3.1 (firmware rev 0x0016 '22.1.1--v2022.01 (Terrific Llam')
SPL initial stack usage: 13392 bytes
Trying to boot from MMC2
Starting ATF on ARM64 core...

NOTICE:  BL31: v2.5(release):08.03.00.002-dirty
NOTICE:  BL31: Built : 17:39:31, May  5 2022

U-Boot SPL 2021.01-g44a87e3ab8 (May 05 2022 - 17:43:49 +0000)
SYSFW ABI: 3.1 (firmware rev 0x0016 '22.1.1--v2022.01 (Terrific Llam')
Trying to boot from MMC2


U-Boot 2021.01-g44a87e3ab8 (May 05 2022 - 17:43:49 +0000)

SoC:   AM64X SR1.0
Model: Texas Instruments AM642 EVM
Board: AM64-GPEVM rev B
DRAM:  2 GiB
NAND:  0 MiB
MMC:   mmc@fa10000: 0, mmc@fa00000: 1
In:    serial@2800000
Out:   serial@2800000
Err:   serial@2800000
Net:   eth0: ethernet@8000000port@1
Hit any key to stop autoboot:  0 
switch to partitions #0, OK
mmc1 is current device
SD/MMC found on device 1
Failed to load 'boot.scr'
1490 bytes read in 2 ms (727.5 KiB/s)
Loaded env from uEnv.txt
Importing environment from mmc1 ...
Running uenvcmd ...
1 bytes read in 2 ms (0 Bytes/s)
Already setup.
18299392 bytes read in 760 ms (23 MiB/s)
42085 bytes read in 4 ms (10 MiB/s)
## Flattened Device Tree blob at 88000000
   Booting using the fdt blob at 0x88000000
   Loading Device Tree to 000000008fff2000, end 000000008ffff464 ... OK

Starting kernel ...

[    0.000000] Booting Linux on physical CPU 0x0000000000 [0x410fd034]
[    0.000000] Linux version 5.10.100-rt62-g204ec708dc () (aarch64-none-linux-gnu-gcc (GNU Toolchain for the 
A-profile Architecture 9.2-2019.12 (arm-9.10)) 9.2.1 20191025, GNU ld (GNU Toolchain for the A-profile Architecture 9.2
-2019.12 (arm-9.10)) 2.33.1.20191209) #1 SMP PREEMPT_RT Fri Jul 29 09:36:06 +03 2022
[    0.000000] Machine model: Texas Instruments AM642 EVM
[    0.000000] earlycon: ns16550a0 at MMIO32 0x0000000002800000 (options '')
[    0.000000] printk: bootconsole [ns16550a0] enabled
[    0.000000] efi: UEFI not found.
[    0.000000] Reserved memory: created DMA memory pool at 0x00000000a0000000, size 1 MiB
[    0.000000] OF: reserved mem: initialized node r5f-dma-memory@a0000000, compatible id shared-dma-pool
[    0.000000] Reserved memory: created DMA memory pool at 0x00000000a0100000, size 15 MiB
[    0.000000] OF: reserved mem: initialized node r5f-memory@a0100000, compatible id shared-dma-pool
[    0.000000] Reserved memory: created DMA memory pool at 0x00000000a1000000, size 1 MiB
[    0.000000] OF: reserved mem: initialized node r5f-dma-memory@a1000000, compatible id shared-dma-pool
[    0.000000] Reserved memory: created DMA memory pool at 0x00000000a1100000, size 15 MiB
[    0.000000] OF: reserved mem: initialized node r5f-memory@a1100000, compatible id shared-dma-pool
[    0.000000] Reserved memory: created DMA memory pool at 0x00000000a2000000, size 1 MiB
[    0.000000] OF: reserved mem: initialized node r5f-dma-memory@a2000000, compatible id shared-dma-pool
[    0.000000] Reserved memory: created DMA memory pool at 0x00000000a2100000, size 15 MiB
[    0.000000] OF: reserved mem: initialized node r5f-memory@a2100000, compatible id shared-dma-pool
[    0.000000] Reserved memory: created DMA memory pool at 0x00000000a3000000, size 1 MiB
[    0.000000] OF: reserved mem: initialized node r5f-dma-memory@a3000000, compatible id shared-dma-pool
[    0.000000] Reserved memory: created DMA memory pool at 0x00000000a3100000, size 15 MiB
[    0.000000] OF: reserved mem: initialized node r5f-memory@a3100000, compatible id shared-dma-pool
[    0.000000] Reserved memory: created DMA memory pool at 0x00000000a4000000, size 1 MiB
[    0.000000] OF: reserved mem: initialized node m4f-dma-memory@a4000000, compatible id shared-dma-pool
[    0.000000] Reserved memory: created DMA memory pool at 0x00000000a4100000, size 15 MiB
[    0.000000] OF: reserved mem: initialized node m4f-memory@a4100000, compatible id shared-dma-pool
[    0.000000] Zone ranges:
[    0.000000]   DMA      [mem 0x0000000080000000-0x00000000ffffffff]
[    0.000000]   DMA32    empty
[    0.000000]   Normal   empty
[    0.000000] Movable zone start for each node
[    0.000000] Early memory node ranges
[    0.000000]   node   0: [mem 0x0000000080000000-0x000000009e7fffff]
[    0.000000]   node   0: [mem 0x000000009e800000-0x00000000a57fffff]
[    0.000000]   node   0: [mem 0x00000000a5800000-0x00000000ffffffff]
[    0.000000] Initmem setup node 0 [mem 0x0000000080000000-0x00000000ffffffff]
[    0.000000] On node 0 totalpages: 524288
[    0.000000]   DMA zone: 8192 pages used for memmap
[    0.000000]   DMA zone: 0 pages reserved
[    0.000000]   DMA zone: 524288 pages, LIFO batch:63
[    0.000000] cma: Reserved 24 MiB at 0x00000000fb800000
[    0.000000] psci: probing for conduit method from DT.
[    0.000000] psci: PSCIv1.1 detected in firmware.
[    0.000000] psci: Using standard PSCI v0.2 function IDs
[    0.000000] psci: Trusted OS migration not required
[    0.000000] psci: SMC Calling Convention v1.2
[    0.000000] percpu: Embedded 18 pages/cpu s34752 r8192 d30784 u73728
[    0.000000] pcpu-alloc: s34752 r8192 d30784 u73728 alloc=18*4096
[    0.000000] pcpu-alloc: [0] 0 [0] 1 
[    0.000000] Detected VIPT I-cache on CPU0
[    0.000000] CPU features: detected: ARM erratum 845719
[    0.000000] CPU features: detected: GIC system register CPU interface
[    0.000000] Built 1 zonelists, mobility grouping on.  Total pages: 516096
[    0.000000] Kernel command line: console=ttyS2,115200n8 earlycon=ns16550a,mmio32,0x02800000 mtdparts=fc40000.spi.0:1
m(ospi.tiboot3),2m(ospi.tispl),4m(ospi.u-boot),256k(ospi.env),256k(ospi.env.backup),57088k@8m(ospi.rootfs),256k(ospi.ph
ypattern) root=PARTUUID=aaeb814c-02 rw rootfstype=ext4 rootwait
[    0.000000] Dentry cache hash table entries: 262144 (order: 9, 2097152 bytes, linear)
[    0.000000] Inode-cache hash table entries: 131072 (order: 8, 1048576 bytes, linear)
[    0.000000] mem auto-init: stack:off, heap alloc:off, heap free:off
[    0.000000] Memory: 1899416K/2097152K available (10688K kernel code, 1166K rwdata, 4156K rodata, 1728K init, 436K bs
s, 173160K reserved, 24576K cma-reserved)
[    0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=2, Nodes=1
[    0.000000] rcu: Preemptible hierarchical RCU implementation.
[    0.000000] rcu:     RCU event tracing is enabled.
[    0.000000] rcu:     RCU restricting CPUs from NR_CPUS=256 to nr_cpu_ids=2.
[    0.000000] rcu:     RCU priority boosting: priority 1 delay 500 ms.
[    0.000000] rcu:     RCU_SOFTIRQ processing moved to rcuc kthreads.
[    0.000000]  No expedited grace period (rcu_normal_after_boot).
[    0.000000]  Trampoline variant of Tasks RCU enabled.
[    0.000000] rcu: RCU calculated value of scheduler-enlistment delay is 25 jiffies.
[    0.000000] rcu: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=2
[    0.000000] NR_IRQS: 64, nr_irqs: 64, preallocated irqs: 0
[    0.000000] GICv3: GIC: Using split EOI/Deactivate mode
[    0.000000] GICv3: 256 SPIs implemented
[    0.000000] GICv3: 0 Extended SPIs implemented
[    0.000000] GICv3: Distributor has no Range Selector support
[    0.000000] GICv3: 16 PPIs implemented
[    0.000000] GICv3: CPU0: found redistributor 0 region 0:0x0000000001840000
[    0.000000] ITS [mem 0x01820000-0x0182ffff]
[    0.000000] GIC: enabling workaround for ITS: Socionext Synquacer pre-ITS
[    0.000000] ITS@0x0000000001820000: Devices Table too large, reduce ids 20->19
[    0.000000] ITS@0x0000000001820000: allocated 524288 Devices @80800000 (flat, esz 8, psz 64K, shr 0)
[    0.000000] ITS: using cache flushing for cmd queue
[    0.000000] GICv3: using LPI property table @0x0000000080030000
[    0.000000] GIC: using cache flushing for LPI property table
[    0.000000] GICv3: CPU0: using allocated LPI pending table @0x0000000080040000
[    0.000000] random: get_random_bytes called from start_kernel+0x320/0x4c8 with crng_init=0
[    0.000000] arch_timer: cp15 timer(s) running at 200.00MHz (phys).
[    0.000000] clocksource: arch_sys_counter: mask: 0xffffffffffffff max_cycles: 0x2e2049d3e8, max_idle_ns: 44079521063
4 ns
[    0.000001] sched_clock: 56 bits at 200MHz, resolution 5ns, wraps every 4398046511102ns
[    0.008511] Console: colour dummy device 80x25
[    0.013104] Calibrating delay loop (skipped), value calculated using timer frequency.. 400.00 BogoMIPS (lpj=800000)
[    0.023776] pid_max: default: 32768 minimum: 301
[    0.028602] LSM: Security Framework initializing
[    0.033392] Mount-cache hash table entries: 4096 (order: 3, 32768 bytes, linear)
[    0.040970] Mountpoint-cache hash table entries: 4096 (order: 3, 32768 bytes, linear)
[    0.050963] rcu: Hierarchical SRCU implementation.
[    0.056473] Platform MSI: msi-controller@1820000 domain created
[    0.062902] PCI/MSI: /bus@f4000/interrupt-controller@1800000/msi-controller@1820000 domain created
[    0.072229] EFI services will not be available.
[    0.077187] smp: Bringing up secondary CPUs ...
[    0.082969] Detected VIPT I-cache on CPU1
[    0.087107] GICv3: CPU1: found redistributor 1 region 0:0x0000000001860000
[    0.094140] GICv3: CPU1: using allocated LPI pending table @0x0000000080050000
[    0.101576] CPU1: Booted secondary processor 0x0000000001 [0x410fd034]
[    0.108404] smp: Brought up 1 node, 2 CPUs
[    0.112634] SMP: Total of 2 processors activated.
[    0.117456] CPU features: detected: 32-bit EL0 Support
[    0.122721] CPU features: detected: CRC32 instructions
[    0.135820] CPU: All CPU(s) started at EL2
[    0.140028] alternatives: patching kernel code
[    0.145807] devtmpfs: initialized
[    0.157854] KASLR disabled due to lack of seed
[    0.162641] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 7645041785100000 ns
[    0.172616] futex hash table entries: 512 (order: 4, 65536 bytes, linear)
[    0.180729] pinctrl core: initialized pinctrl subsystem
[    0.186812] DMI not present or invalid.
[    0.191374] NET: Registered protocol family 16
[    0.198214] DMA: preallocated 256 KiB GFP_KERNEL pool for atomic allocations
[    0.205646] DMA: preallocated 256 KiB GFP_KERNEL|GFP_DMA pool for atomic allocations
[    0.213780] DMA: preallocated 256 KiB GFP_KERNEL|GFP_DMA32 pool for atomic allocations
[    0.222679] thermal_sys: Registered thermal governor 'step_wise'
[    0.223193] hw-breakpoint: found 6 breakpoint and 4 watchpoint registers.
[    0.236378] ASID allocator initialised with 65536 entries
[    0.273549] HugeTLB registered 1.00 GiB page size, pre-allocated 0 pages
[    0.280498] HugeTLB registered 32.0 MiB page size, pre-allocated 0 pages
[    0.287373] HugeTLB registered 2.00 MiB page size, pre-allocated 0 pages
[    0.294236] HugeTLB registered 64.0 KiB page size, pre-allocated 0 pages
[    0.302412] cryptd: max_cpu_qlen set to 1000
[    0.310709] k3-chipinfo 43000014.chipid: Family:AM64X rev:SR1.0 JTAGID[0x0bb3802f] Detected
[    0.320107] vsys_5v0: supplied by evm_12v0
[    0.325028] vsys_3v3: supplied by evm_12v0
[    0.330113] vddb_3v3_display: supplied by vsys_3v3
[    0.336422] iommu: Default domain type: Translated 
[    0.341964] SCSI subsystem initialized
[    0.346677] mc: Linux media interface: v0.10
[    0.351116] videodev: Linux video capture interface: v2.00
[    0.356869] pps_core: LinuxPPS API ver. 1 registered
[    0.361968] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <giometti@linux.it>
[    0.371315] PTP clock support registered
[    0.375368] EDAC MC: Ver: 3.0.0
[    0.379501] omap-mailbox 29020000.mailbox: omap mailbox rev 0x66fc9100
[    0.386467] omap-mailbox 29040000.mailbox: omap mailbox rev 0x66fc9100
[    0.393300] omap-mailbox 29060000.mailbox: omap mailbox rev 0x66fc9100
[    0.400875] FPGA manager framework
[    0.404527] Advanced Linux Sound Architecture Driver Initialized.
[    0.411941] clocksource: Switched to clocksource arch_sys_counter
[    0.418512] VFS: Disk quotas dquot_6.6.0
[    0.422604] VFS: Dquot-cache hash table entries: 512 (order 0, 4096 bytes)
[    0.437167] NET: Registered protocol family 2
[    0.441925] IP idents hash table entries: 32768 (order: 6, 262144 bytes, linear)
[    0.450996] tcp_listen_portaddr_hash hash table entries: 1024 (order: 4, 65536 bytes, linear)
[    0.459894] TCP established hash table entries: 16384 (order: 5, 131072 bytes, linear)
[    0.468200] TCP bind hash table entries: 16384 (order: 7, 917504 bytes, linear)
[    0.476734] TCP: Hash tables configured (established 16384 bind 16384)
[    0.483803] UDP hash table entries: 1024 (order: 5, 131072 bytes, linear)
[    0.490944] UDP-Lite hash table entries: 1024 (order: 5, 131072 bytes, linear)
[    0.498726] NET: Registered protocol family 1
[    0.503867] RPC: Registered named UNIX socket transport module.
[    0.509990] RPC: Registered udp transport module.
[    0.514799] RPC: Registered tcp transport module.
[    0.519603] RPC: Registered tcp NFSv4.1 backchannel transport module.
[    0.526195] PCI: CLS 0 bytes, default 64
[    0.531104] hw perfevents: enabled with armv8_cortex_a53 PMU driver, 7 counters available
[    0.544236] Initialise system trusted keyrings
[    0.549097] workingset: timestamp_bits=46 max_order=19 bucket_order=0
[    0.562047] squashfs: version 4.0 (2009/01/31) Phillip Lougher
[    0.568890] NFS: Registering the id_resolver key type
[    0.574158] Key type id_resolver registered
[    0.578440] Key type id_legacy registered
[    0.582638] nfs4filelayout_init: NFSv4 File Layout Driver Registering...
[    0.589491] nfs4flexfilelayout_init: NFSv4 Flexfile Layout Driver Registering...
[    0.597360] 9p: Installing v9fs 9p2000 file system support
[    0.646959] Key type asymmetric registered
[    0.651208] Asymmetric key parser 'x509' registered
[    0.656304] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 243)
[    0.663877] io scheduler mq-deadline registered
[    0.668521] io scheduler kyber registered
[    0.675473] pinctrl-single f4000.pinctrl: 180 pins, size 720
[    0.682649] pinctrl-single a40000.timesync-router: 512 pins, size 2048
[    0.701454] Serial: 8250/16550 driver, 10 ports, IRQ sharing enabled
[    0.727324] brd: module loaded
[    0.741550] loop: module loaded
[    0.745803] megasas: 07.714.04.00-rc1
[    0.754952] tun: Universal TUN/TAP device driver, 1.6
[    0.761119] igbvf: Intel(R) Gigabit Virtual Function Network Driver
[    0.767585] igbvf: Copyright (c) 2009 - 2012 Intel Corporation.
[    0.773748] sky2: driver version 1.30
[    0.779033] VFIO - User Level meta-driver version: 0.3
[    0.785659] i2c /dev entries driver
[    0.790649] sdhci: Secure Digital Host Controller Interface driver
[    0.797023] sdhci: Copyright(c) Pierre Ossman
[    0.802325] sdhci-pltfm: SDHCI platform and OF driver helper
[    0.809941] SMCCC: SOC_ID: ARCH_SOC_ID not implemented, skipping ....
[    0.818329] optee: probing for conduit method.
[    0.823025] optee: revision 3.12 (3d47a131)
[    0.823650] optee: initialized driver
[    0.834735] NET: Registered protocol family 17
[    0.839586] 9pnet: Installing 9P2000 support
[    0.844076] Key type dns_resolver registered
[    0.848897] printk: bootconsole [ns16550a0]: printing thread started
[    0.848970] Loading compiled-in X.509 certificates
[    0.868014] ti-sci 44043000.dmsc: ABI: 3.1 (firmware rev 0x0016 '22.1.1--v2022.01 (Terrific Llam')
[    0.929787] random: fast init done
[    0.936663] omap-gpmc 3b000000.memory-controller: GPMC revision 6.0
[    0.936691] gpmc_mem_init: disabling cs 0 mapped at 0x0-0x1000000
[    0.939367] omap_i2c 20000000.i2c: bus 0 rev0.12 at 100 kHz
[    0.945296] pca953x 1-0022: supply vcc not found, using dummy regulator
[    0.945472] pca953x 1-0022: using AI
[    0.967986] omap_i2c 20010000.i2c: Arbitration lost
[    0.979957] pca953x 1-0022: failed writing register
[    0.980177] pca953x: probe of 1-0022 failed with error -11
[    0.980360] omap_i2c 20010000.i2c: bus 1 rev0.12 at 400 kHz
[    0.981791] omap_i2c 20020000.i2c: bus 2 rev0.12 at 100 kHz
[    0.983174] omap_i2c 20030000.i2c: bus 3 rev0.12 at 100 kHz
[    0.983697] ti-sci-intr bus@f4000:bus@4000000:interrupt-controller1: Interrupt Router 5 domain created
[��  0.984090] ti-sci-intr bus@f4000:interrupt-controller0: Interrupt Router 3 domain created
[    0.984579] ti-sci-inta 48000000.interrupt-controller: Interrupt Aggregator domain 28 created
[    1.031776] printk: console [ttyS2]: printing thread started
[    1.002966] ti-bcdma 485c0100.dma-controller: Number of rings: 68
[    1.031812] printk: console [ttyS2] enabled
[    1.031817] printk: bootconsole [ns16550a0] disabled
[    1.052724] printk: bootconsole [ns16550a0]: printing thread stopped
[    1.070166] spi-nor spi0.0: s28hs512t (65536 Kbytes)
[    1.070210] 7 cmdlinepart partitions found on MTD device fc40000.spi.0
[    1.070216] Creating 7 MTD partitions on "fc40000.spi.0":
[    1.070225] 0x000000000000-0x000000100000 : "ospi.tiboot3"
[    1.076316] 0x000000100000-0x000000300000 : "ospi.tispl"
[    1.077821] 0x000000300000-0x000000700000 : "ospi.u-boot"
[    1.079180] 0x000000700000-0x000000740000 : "ospi.env"
[    1.080785] 0x000000740000-0x000000780000 : "ospi.env.backup"
[    1.082273] 0x000000800000-0x000003fc0000 : "ospi.rootfs"
[    1.083680] 0x000003fc0000-0x000004000000 : "ospi.phypattern"
[    1.159958] davinci_mdio 8000f00.mdio: davinci mdio revision 9.7, bus freq 1000000
[    1.162119] davinci_mdio 8000f00.mdio: phy[0]: device 8000f00.mdio:00, driver TI DP83867
[    1.162266] am65-cpsw-nuss 8000000.ethernet: initializing am65 cpsw nuss version 0x6BA00903, cpsw version 0x6BA80903
 Ports: 3 quirks:00000002
[    1.163608] am65-cpsw-nuss 8000000.ethernet: set new flow-id-base 16
[    1.164262] am65-cpsw-nuss 8000000.ethernet: initialized cpsw ale version 1.4
[    1.164278] am65-cpsw-nuss 8000000.ethernet: ALE Table size 512
[    1.165176] pps pps0: new PPS source ptp0
[    1.165519] am65-cpsw-nuss 8000000.ethernet: CPTS ver 0x4e8a010c, freq:500000000, add_val:1 pps:1
[    1.180119] am65-cpts 39000000.cpts: CPTS ver 0x4e8a010c, freq:500000000, add_val:1 pps:0
[    1.184261] mmc0: CQHCI version 5.10
[    1.202186] debugfs: Directory 'pd:114' with parent 'pm_genpd' already present!
[    1.221322] ALSA device list:
[    1.221338]   No soundcards found.
[    1.229243] mmc0: SDHCI controller on fa10000.mmc [fa10000.mmc] using ADMA 64-bit
[    1.248152] Waiting for root device PARTUUID=aaeb814c-02...
[    1.321521] mmc0: Command Queue Engine enabled
[    1.321555] mmc0: new HS400 MMC card at address 0001
[    1.322426] mmcblk0: mmc0:0001 S0J56X 14.8 GiB 
[    1.322669] mmcblk0boot0: mmc0:0001 S0J56X partition 1 31.5 MiB
[    1.322888] mmcblk0boot1: mmc0:0001 S0J56X partition 2 31.5 MiB
[    1.323136] mmcblk0rpmb: mmc0:0001 S0J56X partition 3 4.00 MiB, chardev (237:0)

Is this on AM64x EVM or your custom board?

Does Linux boot before you did the modification for PCIe endpoint mode?

No, it's not a custom board we are using AM64X EVM.

And yes linux boots before (If I don't plug PCIe extension cable then it boots)

Is there anyone?

Please attach your kernel patch.

I use default ti-processor-sdk-linux-rt-am64xx-evm-08.02.00.23 linux kernel (linux-rt-5.10.100+gitAUTOINC+204ec708dc-g204ec708dc) without any modification or patches.

Just changed configs to enable endpoint and device-tree for PCI endpoint mode mentioned in J7-SDK

Onur Bay said:

Just changed configs to enable endpoint and device-tree for PCI endpoint mode mentioned in J7-SDK

I need to see the diff of your configs and the diff of the device tree changes.

3872..config.zip (default config file tisdk_am64xx-evm-rt_defconfig)

Here is diff of config:

1805c1805
< CONFIG_PCI_ENDPOINT_TEST=m
---
> CONFIG_PCI_ENDPOINT_TEST=y

and device-tree of endpoint (k3-am642-evm.dts)

@@ -711,13 +711,14 @@ &pcie0_rc {
        phys = <&serdes0_pcie_link>;
        phy-names = "pcie-phy";
        num-lanes = <1>;
+       status = "disabled";
 };
 
 &pcie0_ep {
        phys = <&serdes0_pcie_link>;
        phy-names = "pcie-phy";
        num-lanes = <1>;
-       status = "disabled";
+       status = "okay";
 };
 
 &tscadc0 {

And lastly here is Root-complex's device-tree

diff --git a/arch/arm64/boot/dts/ti/k3-am642-evm.dts b/arch/arm64/boot/dts/ti/k3-am642-evm.dts
index 96f90ebf28..11ce30d948 100644
--- a/arch/arm64/boot/dts/ti/k3-am642-evm.dts
+++ b/arch/arm64/boot/dts/ti/k3-am642-evm.dts
@@ -694,6 +694,7 @@ &mailbox0_cluster7 {
 
 &serdes_ln_ctrl {
        idle-states = <AM64_SERDES0_LANE0_PCIE0>;
+       status = "okay";
 };
 
 &serdes0 {
@@ -706,11 +707,16 @@ serdes0_pcie_link: phy@0 {
        };
 };
 
+&serdes_wiz0 {
+       status = "okay";
+};
+
 &pcie0_rc {
        reset-gpios = <&exp1 5 GPIO_ACTIVE_HIGH>;
        phys = <&serdes0_pcie_link>;
        phy-names = "pcie-phy";
        num-lanes = <1>;
+       status = "okay";
 };
 
 &pcie0_ep {

I am applying these patches and will test it on my EVM.

Onur Bay said:

And yes linux boots before (If I don't plug PCIe extension cable then it boots)

Meanwhile, can you please confirm if Linux boots with the PCIe endpoint mode without PCIe cable connected?

You mentioned two variables - PCIe RC/EP mode and with/without PCIe cable. I want to know which scenarios boot and which don't.

I set CONFIG_PCI_ENDPOINT_TEST=y in kernel config and enabled &pcie0_ep in k3-am642-evm.dts, but I can still boot into Linux login prompt with the new kernel Image and k3-am642-evm.dtb. I don't have the PCIe cable plugged in though, but I doubt it affects Linux boot.

I suspect your issue is not PCIe related, but something in the SD card detect. Please try with different SD card (different speed class).

If I don't plug PCIe extension cable, then Yes, Endpoint linux boots and I see login prompt. But our purpose is using it as pci endpoint and we follow every instruction in J7 SDK manual.

Let me try to use mmc and OSPI bootmode. I will inform soon.

I used OSPI and linux boots. (I don't understand why cannot use SD card which come from AM64 box)

And I see this message on Host device: "01:00.0 Non-VGA unclassified device: Cadence Design Systems, Inc. Device 0100"

But I cannot see /dev/pci* on the Endpoint device.

Hi! The subject owner is currently out of the office. Please allow a couple of days for a response. Thanks.

Ok, I am waiting.

Mr Dannenberg,

Is it possible to communicate two AM64GPEVM board via PCIe?

Is there any progress?

Onur, thanks for your patience. I checked, the subject owner only will be back around middle of this week. Please allow some additional time. Thanks.