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Registering multiple backlight devices with intel_backlight name will obviously fail, regardless of whether they're two connectors in the same drm device or two different drm devices. It would be preferrable to switch to completely unique names, and sunset the generic intel_backlight name. However, there are apparently users out there that hardcode the name, so the change would break backward compatibility. As a compromise, register the first device with intel_backlight name. In the common case, this is the only backlight device anyway. From the second device on, use card%d-%s-backlight format, for example card0-eDP-2-backlight, to make the name unique. This approach does not preclude us from registering the first device using the same naming scheme in the future. v2: Keep using intel_backlight name for first backlight device Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/2794 Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: Jani Nikula <jani.nikula@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/7dc3f6974711ce44522189dc9db05d1e6e24e6d8.1619604743.git.jani.nikula@intel.com |
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| 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.