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Alvin Lee 9e7d03e8b0 drm/amd/display: Use min transition for SubVP into MPO
[Description]
- For SubVP transitioning into MPO, we want to
  use a minimal transition to prevent transient
  underflow
- Transitioning a phantom pipe directly into a
  "real" pipe can result in underflow due to the
  HUBP still having it's "phantom" programming
  when HUBP is unblanked (have to wait for next
  VUPDATE of the new OTG)
- Also ensure subvp pipe lock is acquired early
  enough for programming in dc_commit_state_no_check
- When disabling phantom planes, enable phantom OTG
  first so the disable gets the double buffer update

Reviewed-by: Aric Cyr <Aric.Cyr@amd.com>
Acked-by: Alan Liu <HaoPing.Liu@amd.com>
Signed-off-by: Alvin Lee <Alvin.Lee2@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
History 2022-11-09 17:25:39 -05:00
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Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.