Added support for switching the EMC/CPU ratio src.
Src could be either the DT table or default. The
DT generally will have values tuned for perf/power
balance. But in less demanding use cases like
display off, a low power subset of the table can
be used.
Provide ability to userspace HALs to notify the
kernel of the change in interactivity for it to
switch the src.

Sysfs Node
/sys/kernel/tegra_cpu_emc/table_src

Use DT values
echo 1 > /sys/kernel/tegra_cpu_emc/table_src

Use default values
echo 0 > /sys/kernel/tegra_cpu_emc/table_src

Bug 2384717
Bug 1758252

Change-Id: I9bafddf2b401567d8f7976f9a8a8be21d8c08ad8
Signed-off-by: Somdutta Roy <somduttar@nvidia.com>
Reviewed-on: http://git-master/r/1131520
(cherry picked from commit 029c1cf1ceb7039f4090a098f4172f59d2874e67)
Signed-off-by: Biao Cao <bcao@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/2032522
Reviewed-by: Daniel Fu <danifu@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Vinayak Pane <vpane@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

Since the support for post-cursor2 programming is optional as per
the Display Port 1.2 standard, we derive a platform's willingness to
support it via a device tree property

TDS-2806

Change-Id: Ibab71287c398db8b8700f0e2d480c5234e5a79f0
Signed-off-by: Jay Bhukhanwala <jbhukhanwala@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1581311
Reviewed-by: Shu Zhong <shuz@nvidia.com>
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Ujwal Patel <ujwalp@nvidia.com>