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The power get/put was added in commit1c767b339b("drm/i915: take display port power domain in DP HPD handler") Author: Imre Deak <imre.deak@intel.com> Date: Mon Aug 18 14:42:42 2014 +0300 to account for the HW access in ibx_digital_port_connected(). This latter call was in turn removed in commit7d23e3c37b("drm/i915: Cleaning up intel_dp_hpd_pulse") Author: Shubhangi Shrivastava <shubhangi.shrivastava@intel.com> Date: Wed Mar 30 18:05:23 2016 +0530 after which we didn't actually need the power reference. One way we are accessing the HW during HPD pulse handling is via DP AUX transfers, but the transfer function takes its own reference, so doesn't need the reference in intel_dp_hpd_pulse(). The other spot is in intel_psr_short_pulse()->intel_psr_disable_locked() but that can only happen when the panel is enabled with the corresponding modeset already holding the required power reference. v2: - Remove the unneeded power get/put from intel_psr_disable_locked(). (Ville) - Checkpatch commit quoting format fix in the commit log. Cc: Ville Syrjala <ville.syrjala@linux.intel.com> Cc: Rodrigo Vivi <rodrigo.vivi@intel.com> Cc: José Roberto de Souza <jose.souza@intel.com> Signed-off-by: Imre Deak <imre.deak@intel.com> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20190509173446.31095-9-imre.deak@intel.com
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.