the following patch was just integrated into master: commit 8c440a6befb735a4c1c553f5ff2e4539ec50e490 Author: Neil Chen neilc@nvidia.com Date: Tue Sep 23 17:41:59 2014 +0800
tegra124: add support for full DP link training
The original dp driver supports only fast link training and a special drive setting is used for the link training sequence. This might not be accepted by all panels. The better way is to go through full link training sequence to negotiate for a best drive setting.
With the change, dp driver will try fast link training first, this is same as before. If it fails in fast link training, will try full link training.
BUG=chrome-os-partner:32129 TEST=all panels on blaze/big devices work fine.
Original-Change-Id: I6f3402c4c5993a156c965c7f52b011d336a2946f Original-Signed-off-by: Neil Chen neilc@nvidia.com Original-Reviewed-on: https://chromium-review.googlesource.com/219543 Original-Reviewed-by: Jimmy Zhang jimmzhang@nvidia.com Original-Reviewed-by: Julius Werner jwerner@chromium.org
(cherry picked from commit 24966517d41252384af3c2784def36aebad42434) Signed-off-by: Aaron Durbin adurbin@chromium.org
Change-Id: I3e7e7e749e5c8a9f07ac6132859fcad6fc96c39c Reviewed-on: http://review.coreboot.org/9247 Reviewed-by: Paul Menzel paulepanter@users.sourceforge.net Tested-by: build bot (Jenkins) Reviewed-by: David Hendricks dhendrix@chromium.org
See http://review.coreboot.org/9247 for details.
-gerrit