IMX8QX memory overlap and VPU init fail

[thepnimit]

Hi nxp,

In kernel 5.10.35, I found log 

[ 0.000000] efi: UEFI not found.
[ 0.000000] OF: fdt: Reserved memory: failed to reserve memory for node 'm4@0x88000000': base 0x0000000088000000, size 128 MiB
[ 0.000000] OF: reserved mem: OVERLAP DETECTED!
[ 0.000000] vdev0vring0@90000000 (0x0000000090000000--0x0000000090008000) overlaps with rsc_table@90000000 (0x0000000090000000--0x0000000090008000)
[ 0.000000] Reserved memory: created CMA memory pool at 0x00000000c0000000, size 960 MiB
[ 0.000000] OF: reserved mem: initialized node linux,cma, compatible id shared-dma-pool
[ 0.000000] Reserved memory: created DMA memory pool at 0x0000000090400000, size 1 MiB
[ 0.000000] OF: reserved mem: initialized node vdevbuffer, compatible id shared-dma-pool
[ 0.000000] earlycon: lpuart32 at MMIO32 0x000000005a060000 (options '')
[ 0.000000] printk: bootconsole [lpuart32] enabled
[ 0.000000] NUMA: No NUMA configuration found
[ 0.000000] NUMA: Faking a node at [mem 0x0000000080200000-0x00000000ffffffff]
[ 0.000000] NUMA: NODE_DATA [mem 0xffbc1700-0xffbc3fff]
[ 0.000000] Zone ranges:
[ 0.000000] DMA [mem 0x0000000080200000-0x00000000ffffffff]
[ 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 0x0000000080200000-0x0000000083ffffff]
[ 0.000000] node 0: [mem 0x0000000084000000-0x00000000861fffff]
[ 0.000000] node 0: [mem 0x0000000086200000-0x000000008fffffff]
[ 0.000000] node 0: [mem 0x0000000090000000-0x000000009001ffff]
[ 0.000000] node 0: [mem 0x0000000090020000-0x00000000900fefff]
[ 0.000000] node 0: [mem 0x00000000900ff000-0x00000000900fffff]
[ 0.000000] node 0: [mem 0x0000000090100000-0x00000000901fffff]
[ 0.000000] node 0: [mem 0x0000000090200000-0x00000000904fffff]
[ 0.000000] node 0: [mem 0x0000000090500000-0x0000000091ffffff]
[ 0.000000] node 0: [mem 0x0000000092000000-0x0000000094bfffff]
[ 0.000000] node 0: [mem 0x0000000094c00000-0x00000000ffffffff]
[ 0.000000] Initmem setup node 0 [mem 0x0000000080200000-0x00000000ffffffff]
[ 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: MIGRATE_INFO_TYPE not supported.
[ 0.000000] psci: SMC Calling Convention v1.1
[ 0.000000] percpu: Embedded 25 pages/cpu s62104 r8192 d32104 u102400
[ 0.000000] Detected VIPT I-cache on CPU0
[ 0.000000] CPU features: detected: GIC system register CPU interface
[ 0.000000] Built 1 zonelists, mobility grouping on. Total pages: 515592
[ 0.000000] Policy zone: DMA

and in DTB file is

reserved-memory {
#address-cells = <2>;
#size-cells = <2>;
ranges;

rsc_table: rsc_table@90000000 {
reg = <0 0x90000000 0 0x8000>;
no-map;
};

vdev0vring0: vdev0vring0@90000000 {
reg = <0 0x90000000 0 0x8000>;
no-map;
};

This config is correctly or not? 

And It make VPU init fail or not?

[ 1.825604] [VPU Decoder] warning: init rtx channel failed, ret: -517
[ 1.832119] [VPU Decoder] failed to request mailbox, ret = -517
[ 1.844521] [VPU Encoder] warning: init rtx channel failed, ret: -517
[ 1.851133] [VPU Encoder] fail to request mailbox, ret = -517
[ 5.048018] [VPU Encoder] enable mu for core[0]
[ 5.061240] [VPU Encoder] vpu encoder core[0] firmware version is 1.3.0

[lchen]

I built an image for iMX8QM with the same kernel 5.10.35, and got the same warnings:

failed to reserve memory for node m4 and memory overlap.

Not sure if "failed to reserve memory for node m4" will impact the Cortex-M4 and the FPU operations, such as camera or audio?

[ 0.000000] OF: fdt: Reserved memory: failed to reserve memory for node 'm4@0x88000000': base 0x0000000088000000, size 128 MiB
[ 0.000000] OF: reserved mem: OVERLAP DETECTED!
[ 0.000000] vdev0vring0@90000000 (0x0000000090000000--0x0000000090008000) overlaps with rsc_table0@90000000 (0x0000000090000000--0x000)
[ 0.000000] OF: reserved mem: OVERLAP DETECTED!
[ 0.000000] vdev0vring0@90100000 (0x0000000090100000--0x0000000090108000) overlaps with rsc_table1@90100000 (0x0000000090100000--0x000)
[ 0.000000] Reserved memory: created CMA memory pool at 0x00000000c0000000, size 960 MiB
[ 0.000000] OF: reserved mem: initialized node linux,cma, compatible id shared-dma-pool
[ 0.000000] Reserved memory: created DMA memory pool at 0x0000000090400000, size 1 MiB
[ 0.000000] OF: reserved mem: initialized node vdevbuffer, compatible id shared-dma-pool

[joanxie]

what imx8qxp board version do you use? c0 or B0? did this demo images booting up? or your own built images?pls share with more detailed information

[thepnimit]

Hi joanxie,

I use image from NXP official LF_v5.10_2.0.0_images_IMX8QXPC0MEK.zip

https://www.nxp.com/webapp/Download?colCode=L5.10.35_2.0.0_MX8QXPC0&appType=license

my board chip's: B0

u-boot: imx-boot-imx8qxpmek-sd.bin-flash

dtb: imx8qxp-mek.dtb

Kernel image: Image-imx8_all.bin

os: imx-image-multimedia-imx8qxpc0mek.tar.bz2

dtb code I see in https://source.codeaurora.org/external/imx/linux-imx/tree/arch/arm64/boot/dts/freescale/imx8x-mek.dt...

Best regards

[joanxie]

I have tested on my B0 board successfully, I attached the uuu.auto script, you can put it with your demo images, and use the command "uuu.exe uuu.auto" to download to the board and test again