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There is no reason in debugfs why PSR has been disabled. Currently, without this information, IGT tests cannot decide whether PSR has been disabled on purpose or was it abnormal behavior. Because of it, the status of the test cannot be decided correctly. Add no_psr_reason field into struct intel_psr. Add no_psr_reason into struct intel_crtc_state to prevent staying out of sync when _psr_compute_config is not using computed state. Write the reason, e.g. PSR setup timing not met, into proper PSR debugfs file. Update the reason from new_crtc_state in intel_psr_pre_plane_update. Extend format of debugfs file to have reason when it is non-NULL. Clean the reason when PSR is activated. Refactor intel_psr_post_plane_update to use no_psr_reason along keep_disabled. Changelog: v10->v11 - update the reason from new_crtc_state instead of old_crtc_state [Jouni] v9->v10 - log reason into intel_crtc_state instead of intel_dp->psr [Jouni] - remove clearing no_psr_reason in intel_psr_compute_config [Jouni] - change update of no_psr_reason into more readable form [Jouni] v8->v9 - add no_psr_reason into struct intel_crtc_state [Jouni] - update the reason in intel_psr_pre_plane_update [Jouni] - elaborate on motivation of the feature in commit message [Sebastian] - copy changelog to commit message [Sebastian] v7->v8 - reset no_psr_reason at the begin of intel_psr_compute_config [Jouni] - restore keep_disabled [Jouni] - drop setting "Sink not reliable" [Jouni] - add WA number [Jouni] - if non-NULL, write no_psr_reason after PSR mode [Jouni] v6->v7 - rebase onto new drm-tip v5->v6 - move setting no_psr_reason to intel_psr_post_plane_update [Jouni] - remove setting no_psr_reason when disabling PSR is temporary [Jouni] v4->v5 - fix indentation errors from checkpatch v3->v4 - change format of logging workaround #1136 v2->v3 - change reason description to be more specific [Mika] - remove BSpecs number & WA number from being written into no_psr_reason - replace spaces with tabs v1->v2 - set other reasons than "PSR setup timing not met" - clear no_psr_reason when activating PSR. Signed-off-by: Michał Grzelak <michal.grzelak@intel.com> Reviewed-by: Sebastian Brzezinka <sebastian.brzezinka@intel.com> Reviewed-by: Jouni Högander <jouni.hogander@intel.com> Signed-off-by: Mika Kahola <mika.kahola@intel.com> Link: https://lore.kernel.org/r/20251002095640.1347990-2-michal.grzelak@intel.com |
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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 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.