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[ Upstream commit 8948ca1a12c9a039361bbc3e4627064153971d57 ] If DRM drivers use runtime PM, they currently notify vga_switcheroo whenever they ->runtime_suspend or ->runtime_resume to update vga_switcheroo's internal power state tracking. That's essentially a duplication of a functionality performed by the PM core as it already tracks the GPU's power state and vga_switcheroo can always query it. Introduce a new internal helper vga_switcheroo_pwr_state() which does just that if runtime PM is used, or falls back to vga_switcheroo's internal power state tracking if manual power control is used. Drop a redundant power state check in set_audio_state() while at it. This removes one of the two purposes of the notification mechanism implemented by vga_switcheroo_set_dynamic_switch(). The other one is power management of the audio device and we'll remove that next. Cc: Dave Airlie <airlied@redhat.com> Cc: Ben Skeggs <bskeggs@redhat.com> Cc: Takashi Iwai <tiwai@suse.de> Cc: Alex Deucher <alexander.deucher@amd.com> Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Reviewed-by: Peter Wu <peter@lekensteyn.nl> Tested-by: Kai Heng Feng <kai.heng.feng@canonical.com> # AMD PowerXpress Tested-by: Mike Lothian <mike@fireburn.co.uk> # AMD PowerXpress Tested-by: Denis Lisov <dennis.lissov@gmail.com> # Nvidia Optimus Tested-by: Peter Wu <peter@lekensteyn.nl> # Nvidia Optimus Tested-by: Lukas Wunner <lukas@wunner.de> # MacBook Pro Signed-off-by: Lukas Wunner <lukas@wunner.de> Link: https://patchwork.freedesktop.org/patch/msgid/0aa49d735b988aa04524a8dc339582ace33f0f94.1520068884.git.lukas@wunner.de Signed-off-by: Sasha Levin <sashal@kernel.org>
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. 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.