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authorJimmy Zhang <jimmzhang@nvidia.com>2014-04-21 15:58:45 -0700
committerMarc Jones <marc.jones@se-eng.com>2014-12-19 23:46:50 +0100
commit75f701799a789b3d80eb90a441539be55fd0f5b2 (patch)
tree5c38f50432a3a3005a5a35003f35d2f2bd9d9565 /src/mainboard/google/nyan/devicetree.cb
parent8548a4888a479d0d6ad715967589003ce220a484 (diff)
downloadcoreboot-75f701799a789b3d80eb90a441539be55fd0f5b2.tar.xz
nyan*: Add fast link training functions
Some panels (including those on Big DVT) cannot work fine without link training before sending the video signals, especially multi-lane Full HD panels. We need to use the fast link training functions from kernel to support them. BRANCH=Nyan BUG=chrome-os-partner:28128, chrome-os-partner:28129 TEST=tested on nyan, nyan_big dvt. Vince verified on Full HD panels. Signed-off-by: Jimmy Zhang <jimmzhang@nvidia.com> Original-Change-Id: Ifde8daf0ebdc6fb407610d3563f3311b2a72dbc4 Original-Reviewed-on: https://chromium-review.googlesource.com/196162 Original-Reviewed-by: Hung-Te Lin <hungte@chromium.org> Original-Commit-Queue: Hung-Te Lin <hungte@chromium.org> Original-Tested-by: Hung-Te Lin <hungte@chromium.org> (cherry picked from commit 992132ff3431fc7abba10cc8e910e36d4f3a3f7a) Signed-off-by: Marc Jones <marc.jones@se-eng.com> Change-Id: I5ed091ae7a872fd674ab21f9f80267052fcd24b1 Reviewed-on: http://review.coreboot.org/7864 Tested-by: build bot (Jenkins) Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Diffstat (limited to 'src/mainboard/google/nyan/devicetree.cb')
-rw-r--r--src/mainboard/google/nyan/devicetree.cb4
1 files changed, 2 insertions, 2 deletions
diff --git a/src/mainboard/google/nyan/devicetree.cb b/src/mainboard/google/nyan/devicetree.cb
index e7ae54d52b..8919941360 100644
--- a/src/mainboard/google/nyan/devicetree.cb
+++ b/src/mainboard/google/nyan/devicetree.cb
@@ -88,7 +88,7 @@ chip soc/nvidia/tegra124
register "link_bw" = "10"
# "10" is defined as SOR_LINK_SPEED_G2_7 in sor.h
- register "drive_current" = "0x13131313"
- register "preemphasis" = "0x00000000"
+ register "drive_current" = "0x40404040"
+ register "preemphasis" = "0x0f0f0f0f"
register "postcursor" = "0"
end