[XS] Change in coreboot[main]: mb/google/nissa/var/gothrax: Tune eMMC DLL values

[Simon Yang (Code Review)]

Attention is currently required from: Eric Lai, Jamie Chen, Kyle Lin, Nick Vaccaro, Subrata Banik, Yunlong Jia.

Hello Eric Lai, Kyle Lin, Nick Vaccaro, Subrata Banik, Yunlong Jia, build bot (Jenkins),

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/coreboot/+/79220?usp=email

to look at the new patch set (#3).

The following approvals got outdated and were removed:
Verified+1 by build bot (Jenkins)

Change subject: mb/google/nissa/var/gothrax: Tune eMMC DLL values
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mb/google/nissa/var/gothrax: Tune eMMC DLL values

Gothrax cannot boot into OS and kernel loading failure.
Update eMMC DLL values to improve initialization reliability

- Sending different speed TX/RX command/data signal to eMMC and check
  the response is success or not.
- Collecting every eMMC that use for the project
- Based on above result to provide a fine tune DLL values

BUG=b:310701323
TEST=Cold reboot stress test over 2500 cycles

Change-Id: Ie36cc9948e3d5dee46385e584baad141a249be79
Signed-off-by: Simon Yang 
---
M src/mainboard/google/brya/variants/gothrax/overridetree.cb
1 file changed, 3 insertions(+), 3 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/20/79220/3