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23 October 2021, 00:29:24 UTC
Revision cf7fc75523b32a9a119a466dcff325f1fda38c7d authored by Yongqiang Sun on 09 December 2020, 21:56:51 UTC, committed by Alex Deucher on 23 December 2020, 20:01:53 UTC 
drm/amd/display: change SMU repsonse timeout to 2s.
 
[Why]
there is some garbage showing up during reboot test.
Reason:
SMU might handle display driver msg defered and driver will send
next msg to SMU after 10ms timeout, once SMU FW handle previous msg,
parameters are changed to next one, which result in a wrong value be programmed.

[How]
Extend timeout to 2s so SMU will have enough time to handle driver msg.

Signed-off-by: Yongqiang Sun <yongqiang.sun@amd.com>
Acked-by: Bindu Ramamurthy <bindu.r@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
1 parent e8e91f9
Raw File
Tip revision: cf7fc75523b32a9a119a466dcff325f1fda38c7d authored by Yongqiang Sun on 09 December 2020, 21:56:51 UTC
drm/amd/display: change SMU repsonse timeout to 2s.
Tip revision: cf7fc75
switching-sched.rst 
===================
Switching Scheduler
===================

Each io queue has a set of io scheduler tunables associated with it. These
tunables control how the io scheduler works. You can find these entries
in::

	/sys/block/<device>/queue/iosched

assuming that you have sysfs mounted on /sys. If you don't have sysfs mounted,
you can do so by typing::

	# mount none /sys -t sysfs

It is possible to change the IO scheduler for a given block device on
the fly to select one of mq-deadline, none, bfq, or kyber schedulers -
which can improve that device's throughput.

To set a specific scheduler, simply do this::

	echo SCHEDNAME > /sys/block/DEV/queue/scheduler

where SCHEDNAME is the name of a defined IO scheduler, and DEV is the
device name (hda, hdb, sga, or whatever you happen to have).

The list of defined schedulers can be found by simply doing
a "cat /sys/block/DEV/queue/scheduler" - the list of valid names
will be displayed, with the currently selected scheduler in brackets::

  # cat /sys/block/sda/queue/scheduler
  [mq-deadline] kyber bfq none
  # echo none >/sys/block/sda/queue/scheduler
  # cat /sys/block/sda/queue/scheduler
  [none] mq-deadline kyber bfq
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