nvlink: Disable 1/8th mode for all t19x topologies

Disable single-lane(1/8th) mode for all the t19x nvlink topologies.
Also make sure we enable single-lane mode on nvlink only when
both of the devices connected on either side of the link supports
single lane mode.

Bug 2341788

Change-Id: I95eae827cc6a3b748dd91637cdef27509a840c87
Signed-off-by: Petlozu Pravareshwar <petlozup@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1805191
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/linux/platform/tegra/tegra-nvlink.h b/include/linux/platform/tegra/tegra-nvlink.h
index ae1b7d5cc..40e0a019f 100644
--- a/include/linux/platform/tegra/tegra-nvlink.h
+++ b/include/linux/platform/tegra/tegra-nvlink.h
@@ -248,6 +248,8 @@ struct nvlink_link {
          * TODO: Set this before registering the link
          */
         bool is_connected;
+        /* Is single-lane mode supported for this link ? */
+        bool is_sl_supported;
         /* Pointer to device info of connected end point */
         struct remote_device_info remote_dev_info;
         /*