commit b789e86d6475e0e347b64fa65f70fedfc4fb9af3
author Angel Pons <th3fanbus@gmail.com> Thu Sep 08 18:06:40 2022 +0200
committer Nico Huber <nico.h@gmx.de> Tue Oct 04 11:02:33 2022 +0000
tree 4b3bf856aaf8ef763dacfba002cc045f150406c4
parent 7769b52d61f14ce2f6a2953dc40d0ec07ab6fea2

dp training: Fix `EQ_Delay` function

The DisplayPort v2.0 specification does not mention anything about the
delay being dependent on the link bandwidth.

Change-Id: I18d118ff1bf013175290a1c9fba4d449c7b00cb4
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/libgfxinit/+/67447
Tested-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Nico Huber <nico.h@gmx.de>

common/hw-gfx-dp_training.adb

diff --git a/common/hw-gfx-dp_training.adb b/common/hw-gfx-dp_training.adb
index d613d85..7b06679 100644
--- a/common/hw-gfx-dp_training.adb
+++ b/common/hw-gfx-dp_training.adb
@@ -310,8 +310,7 @@
       function EQ_Delay return Natural is
          Result : Natural := 400; -- DP spec: 400us
       begin
-         if Link.Bandwidth = DP_Bandwidth_5_4 and
-            Link.Receiver_Caps.Aux_RD_Interval /= 0
+         if Link.Receiver_Caps.Aux_RD_Interval /= 0
          then
             Result := Natural (Link.Receiver_Caps.Aux_RD_Interval) * 4_000;
          end if;