[coreboot-gerrit] Change in libgfxinit[master]: dp training: Allow to adjust pre-emphasis during clock recovery
Nico Huber (Code Review)
gerrit at coreboot.org
Sun Aug 27 02:13:42 CEST 2017
Nico Huber has uploaded this change for review. ( https://review.coreboot.org/21216
Change subject: dp training: Allow to adjust pre-emphasis during clock recovery
......................................................................
dp training: Allow to adjust pre-emphasis during clock recovery
That's not demanded by the spec but there are sinks in the wild that
need it.
Change-Id: Ibef5236ca771e0e02beb4e76650ffb6974657846
Signed-off-by: Nico Huber <nico.h at gmx.de>
---
M common/hw-gfx-dp_training.adb
1 file changed, 3 insertions(+), 2 deletions(-)
git pull ssh://review.coreboot.org:29418/libgfxinit refs/changes/16/21216/1
diff --git a/common/hw-gfx-dp_training.adb b/common/hw-gfx-dp_training.adb
index e7411d0..a2d00a7 100644
--- a/common/hw-gfx-dp_training.adb
+++ b/common/hw-gfx-dp_training.adb
@@ -257,8 +257,9 @@
-- According to DP spec, only change preemphasis during channel
-- equalization. What to do if sink requests it during clock recovery?
- -- Linux always accepts new values from the sink, we don't, for now.
- if Success and then (CR_Was_Done and not EQ_Done) then
+ -- Linux always accepts new values from the sink, we too, now: There
+ -- are sinks in the wild that need this.
+ if Success and not EQ_Done then
Train_Set.Pre_Emph :=
DP_Info.Max_Requested_Emph (Status, Link);
if Train_Set.Pre_Emph > Max_Pre_Emph (Port, Train_Set)
--
To view, visit https://review.coreboot.org/21216
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Gerrit-Project: libgfxinit
Gerrit-Branch: master
Gerrit-MessageType: newchange
Gerrit-Change-Id: Ibef5236ca771e0e02beb4e76650ffb6974657846
Gerrit-Change-Number: 21216
Gerrit-PatchSet: 1
Gerrit-Owner: Nico Huber <nico.h at gmx.de>
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