Dillon Varone dd141b16b3 drm/amd/display: Fix race in dmub_srv_wait_for_pending
[WHY]
If commands are being submitted to DMCUB while concurrently waiting for
pending commands to complete, rptr and wptr may never match again, and
reported command count will not update.

[HOW]
Modify dmub_srv_wait_for_pending to constantly check wptr and rptr
match, and update inbox status whenever a message is sent to avoid the
race and determine message completion or idle as quickly as possible.

Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Signed-off-by: Dillon Varone <dillon.varone@amd.com>
Signed-off-by: Ray Wu <ray.wu@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2025-05-13 09:27:36 -04:00
2025-05-06 09:09:49 +02:00
2025-05-06 11:33:49 -04:00
…
2025-02-19 14:53:27 -07:00
2025-05-04 13:55:04 -07:00
…

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 reStructuredText 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.
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