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[ Upstream commit7089784873] [Why] PSR currently relies on the kernel's delayed vblank on/off mechanism as an implicit bufferring mechanism to prevent excessive entry/exit. Without this delay the user experience is impacted since it can take a few frames to enter/exit. [How] Only allow vblank disable immediate for DC when psr is not supported. Leave a TODO indicating that this support should be extended in the future to delay independent of the vblank interrupt. Fixes:92020e81dd("drm/amdgpu/display: set vblank_disable_immediate for DC") Acked-by: Alex Deucher <alexander.deucher@amd.com> Reviewed-by: Harry Wentland <harry.wentland@amd.com> Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
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.