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We would like some freedom to break the user API/ABI for future HW but yet still expose the driver for upstream development on that HW. Currently, we have the i915.force_probe module parameter to avoid binding to HW while the driver is under development, but that is still a little too soft with respect to the stringent no-regression rules if we also plan to be redesigning the uAPI to go along with the new HW. To allow the uAPI to be changed during development, only expose that API and in development HW under STAGING (and BROKEN). Hopefully, making it explicit that such interfaces to that HW are under development and not to be blindly enabled by distributions. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Cc: Jani Nikula <jani.nikula@intel.com> Cc: Rodrigo Vivi <rodrigo.vivi@intel.com> Cc: Dave Airlie <airlied@redhat.com> Acked-by: Dave Airlie <airlied@redhat.com> Acked-by: Jani Nikula <jani.nikula@intel.com> Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20191027154314.11139-1-chris@chris-wilson.co.uk
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.