Patch required for PCN 206440 on top of Jetpack 3.3

Hi NVIDIA

When I tracked PCN 206440, they said that you can check the code applied in JetPack 3.3.3 version of BSP.
The product developed by the customer is already in mass production, and the software was freezed in JetPack 3.3, but the additional H/W supplied was received by D02.
Changing the S/W version of the product being mass-produced is not an easy decision because it requires a new verification work, and it is a sensitive issue because it cannot be decided arbitrarily by an engineer.
So they have to prepare Hotfix based on Jetpack 3.3, but they want to apply only the essential parts related to PCN 206440 in Jetpack 3.3.3.
Since dtb, cboot, and kernel sources have been changed based on Jetpack 3.3, it is difficult to apply PCN206440 Overlay binary patch, and source code level patch is required.

Please guide us to apply the following.
• • Appropriate BCT and DVFS changes required by the Micron memory device
• • Updated bootloader implementing updated OCR register polling timeout per JEDEC specification

You can capture and show us the patch for Jetpack 3.3 or code diff part, and please help to apply the patch in Jetpack 3.3.

Thank you.
Regards,
Jack

Hi,
There is an overlay package for Jetpack 3.3(r28.2.1). Please check
Linux for Tegra R28.2.1 | NVIDIA Developer
PCN206440 Overlay

Hi DaneLLL
Than ks for your kind answer.
Customer already tried the overlay binary.
However they have added lot of code changes from bootloader and kernel side.
They should get patch source code rather than binary what NVIDIA released.
For now, their design qualification manager does not approve changing major SDK version. e.g. JetPack SDK 3.3 to 3.3.1.
We’d appreciate if NVIDIA especially release the patch code for PCN206440 in source code level.
Thanks.
Regards,
Jack

Hi,
cboot is not public so these are delivered in binaries. For kernel, there is one modification in config file, please modify arch/arm64/configs/tegra18_defconfig to remove

-CONFIG_CFQ_GROUP_IOSCHED=y

and add

+CONFIG_MMC_CQ_HCI=y

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