Chen Wisley has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/43284 )
Change subject: mb/google/hatch: Set SA slow slew rate to 1/2 for jinlon/dratini ......................................................................
mb/google/hatch: Set SA slow slew rate to 1/2 for jinlon/dratini
Applied CL (cb:38212) to reduce acoustic noise, and observed that screen flicked on vt2 on some devices after idle a perior of time. Remove SSR (1/8) setting for SA to default SSR 1/2, issue disappeared, and didn't affect noise much.
BUG=none TEST=build dratini, observe that screen flick issue disapppered
Change-Id: I9e81c2f15dd6babfa360eee213fc4ab6310c7455 --- M src/mainboard/google/hatch/variants/dratini/overridetree.cb M src/mainboard/google/hatch/variants/jinlon/overridetree.cb 2 files changed, 0 insertions(+), 2 deletions(-)
git pull ssh://review.coreboot.org:29418/coreboot refs/changes/84/43284/1
diff --git a/src/mainboard/google/hatch/variants/dratini/overridetree.cb b/src/mainboard/google/hatch/variants/dratini/overridetree.cb index 0bada7d..2bfcc26 100644 --- a/src/mainboard/google/hatch/variants/dratini/overridetree.cb +++ b/src/mainboard/google/hatch/variants/dratini/overridetree.cb @@ -23,7 +23,6 @@ register "AcousticNoiseMitigation" = "1" register "SlowSlewRateForIa" = "2" register "SlowSlewRateForGt" = "2" - register "SlowSlewRateForSa" = "2" register "FastPkgCRampDisableIa" = "1" register "FastPkgCRampDisableGt" = "1" register "FastPkgCRampDisableSa" = "1" diff --git a/src/mainboard/google/hatch/variants/jinlon/overridetree.cb b/src/mainboard/google/hatch/variants/jinlon/overridetree.cb index a3bb782..fc3bb85 100644 --- a/src/mainboard/google/hatch/variants/jinlon/overridetree.cb +++ b/src/mainboard/google/hatch/variants/jinlon/overridetree.cb @@ -23,7 +23,6 @@ register "AcousticNoiseMitigation" = "1" register "SlowSlewRateForIa" = "2" register "SlowSlewRateForGt" = "2" - register "SlowSlewRateForSa" = "2" register "FastPkgCRampDisableIa" = "1" register "FastPkgCRampDisableGt" = "1" register "FastPkgCRampDisableSa" = "1"