88d8822d30
Currently USB-audio driver manages the auto-pm of the primary interface although a card may consist of multiple interfaces. This may leave the secondary and other interfaces left running unnecessarily after the auto-suspend. This patch allows the driver managing the auto-pm of all bundled interfaces per card. The chip->pm_intf field is extended as chip->intf[] to contain the array of assigned interfaces, and the runtime-PM is performed to all those interfaces. Tested-by: Macpaul Lin <macpaul.lin@mediatek.com> Link: https://lore.kernel.org/r/20200605064117.28504-1-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
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.