commit 3d3452f167b4e1e9ec3c438dfb8ff5a480e9d92c
author Greg V <greg@unrelenting.technology> Tue Oct 08 02:05:05 2019 +0300
committer Nico Huber <nico.h@gmx.de> Thu Oct 17 19:56:43 2019 +0000
tree 32147e8e5772b23a6ba9dc0a61c7b209b1033973
parent 04c1d01f2bd5b67f0fcb8f620ac83b7b84c47966

dp_info: read eDP 1.4+ DPCD link rates

This is required for google/eve (Pixelbook), where only this new
method of reporting the link rate is supported, and the
Max_Link_Rate in the regular DPCD struct is 0x00.

Change-Id: I52b4d8ad94564904854b502f300b812c41a9751a
Signed-off-by: Greg V <greg@unrelenting.technology>
Reviewed-on: https://review.coreboot.org/c/libgfxinit/+/35869
Tested-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Nico Huber <nico.h@gmx.de>

common/hw-gfx-gma-connector_info.adb

diff --git a/common/hw-gfx-gma-connector_info.adb b/common/hw-gfx-gma-connector_info.adb
index e8357be..3ce807e 100644
--- a/common/hw-gfx-gma-connector_info.adb
+++ b/common/hw-gfx-gma-connector_info.adb
@@ -51,6 +51,10 @@
             Port     => DP_Port,
             Success  => Success);
          if Success then
+            DP_Info.Read_eDP_Rates
+              (Link     => Port_Cfg.DP,
+               Port     => DP_Port);
+
             DP_Info.Preferred_Link_Setting
               (Link     => Port_Cfg.DP,
                Mode     => Port_Cfg.Mode,