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agherzan / meta-raspberrypi

Yocto/OE BSP layer for the Raspberry Pi boards
https://www.yoctoproject.org/
MIT License
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Console messages not printing properly thorugh UART #640

Closed bhargavthriler closed 2 years ago

bhargavthriler commented 4 years ago

Description

Console messages not printing properly thorugh UART while using master branch of meta-raspberrypi and poky in RPI3 B+ When ENABLE_UART = "1" and RPI_USE_U_BOOT = "1" is added in local.conf

But when switch back zeus in both the branches (meta-raspberrypi and poky) console works fine. Is there any new change after zeus ?

Or am I doing some mistake here ?

Steps to reproduce the issue:

  1. Clone poky
  2. Clone meta-raspberrypi
  3. Add ENABLE_UART = "1" and RPI_USE_U_BOOT = "1" in conf/local.conf before building .
  4. Flash sd card using bmaptool
  5. Connect gpio pin 6, 8, 10 (gnd, txd, rxd) to Usb To Rs232 Ttl Converter.
  6. Use minicom to connect to console

Describe the results you received:

U-Boot 2020.04 (Apr 13 2020 - 15:02:18 +0000)

DRAM:  948 MiB
RPI 3 Model B (0xa02082)
MMC:   mmc@7e202000: 0, sdhci@7e300000: 1
Loading Environment from FAT... *** Warning - bad CRC, using default environment

In:    serial
Out:   vidconsole
Err:   vidconsole
Net:   No ethernet found.
starting USB...
Bus usb@7e980000: scanning bus usb@7e980000 for devices... �
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**Describe the results you expected:**
While building from `zeus` branch

U-Boot SPL 2019.04-4.19.35-1.1.0+g4d37753 (Dec 23 2019 - 10:51:14 +0000) power_bd71837_init DDRINFO: start DRAM init DDRINFO:ddrphy calibration done DDRINFO: ddrmix config done Normal Boot Trying to boot from ROMAPI image offset 0x8000, pagesize 0x200, ivt offset 0x0

U-Boot 2019.04-4.19.35-1.1.0+g4d37753 (Dec 23 2019 - 10:51:14 +0000)

CPU: Freescale i.MX8MNano Quad rev1.0 1500 MHz (running at 1200 MHz) CPU: Commercial temperature grade (0C to 95C) at 38C Reset cause: POR Model: NXP i.MX8MNano EVK board DRAM: 2 GiB TCPC: Vendor ID [0x1fc9], Product ID [0x5110], Addr [I2C1 0x52] Power supply on USB2 TCPC: Vendor ID [0x1fc9], Product ID [0x5110], Addr [I2C1 0x50] MMC: FSL_SDHC: 1, FSL_SDHC: 2 Loading Environment from MMC... Run CMD11 1.8V switch *** Warning - bad CRC, using default environment

No panel detected: default to MIPI2HDMI adv7535_init: Can't find device id=0x3d, on bus 1 Display: MIPI2HDMI (1920x1080) Video: 1920x1080x24 In: serial Out: serial Err: serial

BuildInfo:

Run CMD11 1.8V switch switch to partitions #0, OK mmc1 is current device flash target is MMC:1 Run CMD11 1.8V switch Net:
Warning: ethernet@30be0000 using MAC address from ROM eth0: ethernet@30be0000 Fastboot: Normal Normal Boot Hit any key to stop autoboot: 0 Run CMD11 1.8V switch switch to partitions #0, OK mmc1 is current device Run CMD11 1.8V switch 24263168 bytes read in 387 ms (59.8 MiB/s) Booting from mmc ... 40173 bytes read in 6 ms (6.4 MiB/s)

Flattened Device Tree blob at 43000000

Leistungsabfall commented 4 years ago

I have the same problem on a PI Zero W.

PatrickLang commented 4 years ago

Same on rpi zero w. Thud worked, dunfell does not. I suspect the clock rate fix needed for mini uart is not working

PatrickLang commented 4 years ago

Yes, something changed related to the GPU clock rate on the RPi Zero-W.

I manually added this to /boot/config.txt, and now the UART works for serial console:

gpu_freq=250
PatrickLang commented 4 years ago

I added these lines to local.conf and built an image. It works with UART

GPU_FREQ = "250"
GPU_MEM = "16"

(GPU_MEM is not required, I just set it to save memory since I don't need HDMI output)

Leistungsabfall commented 4 years ago

Thanks for sharing your workaround, works great!

kraj commented 4 years ago

Does it work ok without u-boot ?

PatrickLang commented 4 years ago

@kraj I am not using u-boot And it works when I set gpu clock

kraj commented 4 years ago

your description states you are RPI_USE_U_BOOT = "1"

can you comment that out and see if you still have issues ?

bhargavthriler commented 4 years ago

your description states you are RPI_USE_U_BOOT = "1"

can you comment that out and see if you still have issues ?

Yes even without u-boot the issue is same

kraj commented 4 years ago

Ok then I guess we need a patch to boot files recipe to change the gpu frequency settings

bhargavthriler commented 4 years ago

Thanks @PatrickLang your works great with rpi3 b+ also

bhargavthriler commented 4 years ago

Ok then I guess we need a patch to boot files recipe to change the gpu frequency settings

Exactly what changed ? and where can I find the change if I want check the root cause of this issue ?

agherzan commented 4 years ago

This sounds to me like a bug in upstream. Have we followed up? Does raspbian set the GPU freq as well?

bhargavthriler commented 3 years ago

~This is fixed in the latest build.~ ~Closing this issue.~ This issue is still present while building image with u-boot RPI_USE_U_BOOT = "1"

agherzan commented 2 years ago

@bhargavthriler This seems to be an old issue. Are you still looking into it? If yes, can you please try to replicate with the latest master and provide feedback if this is reproducible on setups with u-boot and/or setups without uboot?

agherzan commented 2 years ago

Closing due to inactivity. I'll close this issue but feel free to comment if we get more info.

bhargavthriler commented 2 years ago

@bhargavthriler This seems to be an old issue. Are you still looking into it? If yes, can you please try to replicate with the latest master and provide feedback if this is reproducible on setups with u-boot and/or setups without uboot?

I missed this, I will look into this.

bhargavthriler commented 2 years ago

Issue resolved ( checked with latest build ).

agherzan commented 2 years ago

Issue resolved ( checked with latest build ).

Thanks for confirming.