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authorWisley Chen <wisley.chen@quantatw.com>2020-07-08 16:18:46 +0800
committerPatrick Georgi <pgeorgi@google.com>2020-07-14 16:08:06 +0000
commit51c6d4429c65e01ac936de078482c4bab1a7a078 (patch)
treebdbce60403d3c50b2f6976b1c94c9d9ba1828bae /src/mainboard/google/hatch
parent370868766b90ce4bfa0342b6266a232b5326df50 (diff)
downloadcoreboot-51c6d4429c65e01ac936de078482c4bab1a7a078.tar.xz
mb/google/hatch: Set SA slow slew rate to 1/2 for jinlon/dratini
Screen flickered on VT2 on some devices after idle a period of time. Remove SSR (1/8) setting for SA to default SSR (1/2), screen flicking issue disappeared, and didn't affect acoustic noise much. Because CB:38212 (commit eae254e) caused this issue. BUG=b:160754994 TEST=build dratini, observe that screen flick issue disapppered Change-Id: I9e81c2f15dd6babfa360eee213fc4ab6310c7455 Signed-off-by: Wisley Chen <wisley.chen@quantatw.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/43284 Reviewed-by: Paul Fagerburg <pfagerburg@chromium.org> Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/mainboard/google/hatch')
-rw-r--r--src/mainboard/google/hatch/variants/dratini/overridetree.cb1
-rw-r--r--src/mainboard/google/hatch/variants/jinlon/overridetree.cb1
2 files changed, 0 insertions, 2 deletions
diff --git a/src/mainboard/google/hatch/variants/dratini/overridetree.cb b/src/mainboard/google/hatch/variants/dratini/overridetree.cb
index 0bada7d916..2bfcc26c89 100644
--- a/src/mainboard/google/hatch/variants/dratini/overridetree.cb
+++ b/src/mainboard/google/hatch/variants/dratini/overridetree.cb
@@ -23,7 +23,6 @@ chip soc/intel/cannonlake
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 a3bb782a36..fc3bb854b0 100644
--- a/src/mainboard/google/hatch/variants/jinlon/overridetree.cb
+++ b/src/mainboard/google/hatch/variants/jinlon/overridetree.cb
@@ -23,7 +23,6 @@ chip soc/intel/cannonlake
register "AcousticNoiseMitigation" = "1"
register "SlowSlewRateForIa" = "2"
register "SlowSlewRateForGt" = "2"
- register "SlowSlewRateForSa" = "2"
register "FastPkgCRampDisableIa" = "1"
register "FastPkgCRampDisableGt" = "1"
register "FastPkgCRampDisableSa" = "1"