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Daniele Ceraolo Spurio 91e55e545a drm/i915/uc: Unify uc_fw status tracking
We currently track fetch and load status separately, but the 2 are
actually sequential in the uc lifetime (fetch must complete before we
can attempt the load!). Unifying the 2 variables we can better follow
the sequential states and improve our trackng of the uC state.

Also, sprinkle some GEM_BUG_ON to make sure we transition correctly
between states.

v2: rename states, add the running state (Michal), drop some logs in
    the fetch path (Michal, Chris)

v3: re-rename states, extend early status check to all helpers (Michal)

Suggested-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20190725001813.4740-5-daniele.ceraolospurio@intel.com
History 2019-07-25 07:30:41 +01:00
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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.