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Hi TI Expert,
Please give us minimal and average reference startup time at Linux OS from TDA4 power on to 2D surrounded stitching view.
Please give us suggestion about the startup time optimization ?
1. EMMC supports higher data width, set up higher EMMC clock frequency?
2. LPDDR 4 operation frequency ?
3. Boot mode Pin configuration will impace Boot-up sequence;
4. POST bypass mode (MCU 8 and MCU 9=0b11: Power on self-test): skip PBIST and LBIS test and reduce 20ms startup time.
Are the PBIST and LBIS necessary for functional safety device? POST configuation is only used at development phase, not use at mass production phase ?
Please give us minimal and average reference startup time at Linux OS from TDA4 power on to 2D surrounded stitching view.
This depends on the boot media as well. With a combination of SBL booting Linux from OSPI with file system in eMMC we can get this to as low as 2-3 Seconds to first frame sent out to display. Standard SDK booting from SD with full fledged Linux booting followed by Surround view is around 25 Seconds.
1. EMMC supports higher data width, set up higher EMMC clock frequency?
What is the mode/frequency you need?
2. LPDDR 4 operation frequency ?
4266 MTS
3. Boot mode Pin configuration will impace Boot-up sequence;
Yes OSPI & eMMC are the fastest. SD is slower.
POST bypass mode (MCU 8 and MCU 9=0b11: Power on self-test): skip PBIST and LBIS test and reduce 20ms startup time.
Are the PBIST and LBIS necessary for functional safety device? POST configuation is only used at development phase, not use at mass production phase ?
This is needed for functional safety.
- Keerthy
Hi,Keerthy
I use sdk7.01,and use sd sbl boot,but I find kernel is load after at least 10s,how can I optimize it .I find it very slow when copy the kernel image.
Hi,Keerthy,
1, I use sdk7.01,I use sbl boot from sd card, when sbl boot start and have log, I find copy kernel image is at lease 10s.How can I optimitize it.
2,you say 2-3s first frame on which core
1, I use sdk7.01,I use sbl boot from sd card, when sbl boot start and have log, I find copy kernel image is at lease 10s.How can I optimitize it.
Switching to OSPI. Loading kernel from OSPI as part of combined boot Image.
Here is a detailed App note for DRA821. Similar steps will work for TDA4VM: https://www.ti.com.cn/cn/lit/pdf/sprad09
Best Regards,
Keerthy