Activity
From 04/21/2025 to 05/20/2025
05/20/2025
- RD 05:29 AM Software Development: RE: Enable DDR ECC in Am62A processor
- Hi Jonathan,
Thank you for your support. It's clear now, and I see that they have provided the DDR ECC driver code in R5. I will look into it and try to inject and test DDR at runtime.
Thank you,
Rajkumar
05/19/2025
- JC 03:29 PM Software Development: RE: Enable DDR ECC in Am62A processor
- Rajkumar Dumala wrote in message#6956:
> Hi Jonathan,
> ...
05/16/2025
- RD 06:33 AM Software Development: RE: Enable DDR ECC in Am62A processor
- Hi Jonathan,
Thank you for the response.
I applied the three patches you provided to my current workspace, rebuilt U-Boot and the device tree, and it is working fine—the system is booting successfully.
However, I have a few doub...
05/14/2025
- JC 08:34 PM Software Development: RE: Enable DDR ECC in Am62A processor
- Attached 2 patches for u-boot and 1 patch for the kernel.
Most of these changes you and Mike have already talked about. I think attachment:0002-mitysom-62ax-hack-Reduce-4GB-size-for-ECC.patch is likely the part your missing.
Also ... - JC 02:20 PM Software Development: RE: Enable DDR ECC in Am62A processor
- Thanks Rajkumar, I agree. I'll look into it today.
- RD 04:22 AM Software Development: RE: Enable DDR ECC in Am62A processor
- Hi Jonathan,
Thank you for the clarification.
From what I understand, the DDR setup code dynamically detects the RAM size and initializes the DDR during the U-Boot phase. When ECC is enabled, a portion of memory (around 1/9th) is r...
05/13/2025
- JC 09:25 PM Software Development: RE: Debian SDK Not booting in am62p (Am62x dev kit)
- Rajkumar Dumala wrote in message#6940:
> Hi Mike,
> ...
Note per "PCN20250509000":https://support.criticallink.com/redmine/projects/mitysom_am62x/wiki/Errata_and_Module_Product_Change_Notifications the AM62A you have may be set to 1.25... - MW 09:29 AM Software Development: RE: Debian SDK Not booting in am62p (Am62x dev kit)
- Hi Rajkumar,
It's not clear why there would be a difference between the two. It's the same processor / frequency design.
You might try and disable all of the peripherals you don't intend to use in the device tree you are using, as... - RD 07:28 AM Software Development: RE: Debian SDK Not booting in am62p (Am62x dev kit)
- Hi Mike,
I was on leave for the past four days, so I wasn't able to communicate.
When we tested on the TI EVM, the behavior was slightly better, and we were able to achieve 800 Hz.
Thank you,
Rajkumar.
- JC 04:48 PM Software Development: RE: Enable DDR ECC in Am62A processor
- Sorry guys. Ecc doesn't work with the current u-boot code.
The issue is my ddr setup code which dynamically sets up the ddr based on ddr size. The code needs to reduce the max size when ecc is enabled.
I have some hard coded test c... - MW 02:21 PM Software Development: RE: Enable DDR ECC in Am62A processor
- Hi Raj,
Does it work on the TI EVM? The reason I ask is that the EVM has 8 GB of memory. I just want to make sure it's memory size and not something with the IPC / DSP comms and enabling ECC that is the problem.
-Mike
- RD 02:01 PM Software Development: RE: Enable DDR ECC in Am62A processor
- Hi Mike,
I don't understand why it's not working, even though all the reserved regions seem to be within the valid memory range.
@@[ 0.000000] Reserved memory: created CMA memory pool at 0x00000000c0000000, size 256 MiB
[ 0.00... - MW 12:11 PM Software Development: RE: Enable DDR ECC in Am62A processor
- Hi Rajkumar,
From this link:
https://support.criticallink.com/redmine/projects/mitysom_am62x/wiki/Enabling_DDRSS_ECC
The maximum memory address is approximately 0xFFFFFFFF * 8 / 9 ~= 0xE38E38E2
It looks like the maximum CMA s... - RD 10:42 AM Software Development: RE: Enable DDR ECC in Am62A processor
- Hello,
It was my mistake—I shared the wrong screenshot earlier. You can find the correct one attached with this message.
Thank you,
Rajkumar - RD 10:38 AM Software Development: RE: Enable DDR ECC in Am62A processor
- Hello Mike,
I reduced the CMA size to 512 MiB; however, the issue remains the same.I am providing the image for your reference.
Thank you,
Rajkumar.
- MW 09:37 AM Software Development: RE: Enable DDR ECC in Am62A processor
- Well. Sorry it only goes up to 0xF0000000. But that still may be too high.
- MW 09:36 AM Software Development: RE: Enable DDR ECC in Am62A processor
- Hello,
When you enable ECC in LPDDR4, you reduce the maximum amount of addressable memory available to the device. IT uses some of the 4 GB to hold the ECC data.
The CMA settings I am seeing above include a 576 MB (assuming 0x2000... - RD 07:49 AM Software Development: RE: Enable DDR ECC in Am62A processor
- Just to add to the above point:
In the boot log, it shows that ECC is enabled, and I am able to run some test cases as mentioned in the TI documentation using U-Boot (manual boot mode).
Thank you. - Hello there,
We are using the MitySOM-AM62x Devkit with the AM62A System on Module (SoM), which includes 4 GB of LPDDR4 (with inline ECC).
As part of SDL, we enabled ECC in the R5 MSRAM (512 KB) it is working fine . After that, I e...
05/07/2025
- JC 02:55 PM Software Development: RE: Debian SDK Not booting in am62p (Am62x dev kit)
- Note we are not super familiar with ROS but from my quick googling, sending messages around 1kHz does seem like its approaching the limits of ROS2 even on a desktop system. I'm not saying its not possible because I don't know but we shou...
- JC 02:21 PM Software Development: RE: Debian SDK Not booting in am62p (Am62x dev kit)
- Rajkumar, Note I added pre tags around your code dumps. You have been using the @ symbols but that only works for single lines. You can easily add the pre tags by highlighting what you want marked as code and then hitting the pre butto...
- MW 10:06 AM Software Development: RE: Debian SDK Not booting in am62p (Am62x dev kit)
- When you run the example on the TI EVM (with SDK 10.1 + RT config), do you see 1000 Hz performance or the same 600 Hz performance?
- RD 05:46 AM Software Development: RE: Debian SDK Not booting in am62p (Am62x dev kit)
- Hi Mike,
We have pulled the Ubuntu-based Docker container on top of the MitySOM SDK 10.01.
We built the kernel using the following command:
make O="$BUILDDIR" defconfig ti_arm64_prune.config mitysom-am62xx-devkit.config ti_rt.config...
05/02/2025
- RD 01:06 PM Software Development: RE: Debian SDK Not booting in am62p (Am62x dev kit)
- Hi Mike,
The U-Boot build is working fine. I haven't tried the SD card image you mentioned yet, but I will try it and update you.
Thank you.
05/01/2025
- JC 07:43 PM Software Development: RE: Debian SDK Not booting in am62p (Am62x dev kit)
- Updated 10.1 62A images have been released. https://support.criticallink.com/redmine/projects/mitysom_am62x/wiki/Repositories_and_Pre-built_Images#MitySOM-AM62Ax-Development-Kit-SD-Card-Image
04/30/2025
- JC 03:45 PM Software Development: RE: Debian SDK Not booting in am62p (Am62x dev kit)
- I also just pushed the commit to the mitysom-u-boot-2024.04 u-boot branch. So you could build u-boot and update the 10.1 SDK sdcard image. Similar to how you did the debian image.
https://support.criticallink.com/gitweb/?p=u-boot-ti.g... - JC 02:13 PM Software Development: RE: Debian SDK Not booting in am62p (Am62x dev kit)
> Card did not respond to voltage select! : -110
> ...
I was just looking into this error case last week. Do you happen to be using a sandisk sdcard?
In the 10.1 SDK u-boot, TI has enabled UHS mode in u-boot to allow booting fas...- RD 01:07 PM Software Development: RE: Debian SDK Not booting in am62p (Am62x dev kit)
- Hi Mike,
Hope you're doing well.
We received the AM62A SoM today from Critical Link and inserted it into the AM62x Development Kit.
We flashed the SD card with the reference microSD card image (tisdk-default-image-mitysom-am62ax.roo...
04/29/2025
- JC 01:43 PM Software Development: RE: Debian SDK Not booting in am62p (Am62x dev kit)
- > I ran the 62xx-build-dts.sh script, but it threw an error because it was unable to find the .config file
Thanks for pointing this out. I'd never tried using the dts script without already having run the full build. But this can be... - MW 12:54 PM Software Development: RE: Debian SDK Not booting in am62p (Am62x dev kit)
- Glad you got it fixed! (our comments passed each other!)
- MW 12:53 PM Software Development: RE: Debian SDK Not booting in am62p (Am62x dev kit)
- Can you check if you disabled the MCAN0 mux options? Usually the first device to claim the resource wins, so if MCAN initializes first it might claim the pins on you.
make sure the lines below are commented out in k3-am62px-mitysom-d... - RD 12:46 PM Software Development: RE: Debian SDK Not booting in am62p (Am62x dev kit)
- Hi Mike,
Update on the above comment:
It is working now. The issue was that pins B23 and F20 were already being used in the main_gpio_p3_pins_default node for the P3 connector. I commented out those two pins, and now UART5 has started ... - RD 11:54 AM Software Development: RE: Debian SDK Not booting in am62p (Am62x dev kit)
- We’ve now implemented the changes you suggested, and the OS is working fine.
Since we only copied the U-Boot and device tree from the Critical Link (CL) build into the TI file system, we needed to explicitly enable main_uart5 in the d...
04/21/2025
- JC 02:54 PM Software Development: RE: Video encoding power performance
- Nothing beyond some of the MIPI camera streaming.
Do you have a specific encoding in mind? A gstreamer pipeline we could try? - Have you done any performance testing with video encoding? We are specifically looking for the power consumption delta between AM62A HW encode vs AM62 software encoding.