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Matt Roper b3749611a5 drm/i915: Eliminate IS_MTL_GRAPHICS_STEP 
[ Upstream commit 5a213086a0 ]

Several workarounds are guarded by IS_MTL_GRAPHICS_STEP.  However none
of these workarounds are actually tied to MTL as a platform; they only
relate to the Xe_LPG graphics IP, regardless of what platform it appears
in.  At the moment MTL is the only platform that uses Xe_LPG with IP
versions 12.70 and 12.71, but we can't count on this being true in the
future.  Switch these to use a new IS_GFX_GT_IP_STEP() macro instead
that is purely based on IP version.  IS_GFX_GT_IP_STEP() is also
GT-based rather than device-based, which will help prevent mistakes
where we accidentally try to apply Xe_LPG graphics workarounds to the
Xe_LPM+ media GT and vice-versa.

v2:
 - Switch to a more generic and shorter IS_GT_IP_STEP macro that can be
   used for both graphics and media IP (and any other kind of GTs that
   show up in the future).
v3:
 - Switch back to long-form IS_GFX_GT_IP_STEP macro.  (Jani)
 - Move macro to intel_gt.h.  (Andi)
v4:
 - Build IS_GFX_GT_IP_STEP on top of IS_GFX_GT_IP_RANGE and
   IS_GRAPHICS_STEP building blocks and name the parameters from/until
   rather than begin/fixed.  (Jani)
 - Fix usage examples in comment.
v5:
 - Tweak comment on macro.  (Gustavo)

Cc: Gustavo Sousa <gustavo.sousa@intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Cc: Andi Shyti <andi.shyti@linux.intel.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Gustavo Sousa <gustavo.sousa@intel.com>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230821180619.650007-15-matthew.d.roper@intel.com
Stable-dep-of: 186bce6827 ("drm/i915/mtl: Update workaround 14018575942")
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2024-04-10 16:35:45 +02:00
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README

README 

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.