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[Why] The call currently does two things: 1. Exits DMCUB from idle optimization if it was in 2. Checks DMCUB scratch register to determine if we need to call DMCUB to do deferred HW restore and then sends the command if it's ready for it. By doing (1) we prevent driver idle from being renotified in the cases where driver had previously allowed DC level idle optimizations via dc_allow_idle_optimizations since it thinks: allow == dc->idle_optimizations_allowed ...and that the operation is a no-op. We want driver idle to be resent at the next opprotunity to do so for video playback cases. [How] Migrate all usecases of dc_z10_restore to only perform (2). Add extra calls to dc_allow_idle_optimizations to handle (1) and also keep SW state matching with when we requested enter/exit of DMCUB idle optimizations. Ensure cursor idle optimizations false always get called when IPS is supported. Further rework/redesign is needed to decide whether we need a separate level of DM allow vs DC allow and when to attempt re-entry. Reviewed-by: Yihan Zhu <yihan.zhu@amd.com> Reviewed-by: Charlene Liu <charlene.liu@amd.com> Acked-by: Alex Hung <alex.hung@amd.com> Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com> Tested-by: Daniel Wheeler <daniel.wheeler@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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.