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commitddb5294599upstream. In addition to using vcsi regulator for the display, looks like droid4 is using vcsi regulator to trigger off mode internally with the PMIC firmware when the SoC enters deeper idle states. This is configured in the Motorola Mapphone Linux kernel sources as "zerov_regulator". As we currently don't support off mode during idle for omap4, we must prevent vcsi from being disabled when the display is blanked to prevent the PMIC change to off mode. Otherwise the device will hang on entering idle when the display is blanked. Before commit089b3f61ec("regulator: core: Let boot-on regulators be powered off"), the boot-on regulators never got disabled like they should and vcsi did not get turned off on idle. Let's fix the issue by setting vcsi to always-on for now. Later on we may want to claim the vcsi regulator also in the PM code if needed. Fixes:089b3f61ec("regulator: core: Let boot-on regulators be powered off") Cc: Merlijn Wajer <merlijn@wizzup.org> Cc: Pavel Machek <pavel@ucw.cz> Cc: Sebastian Reichel <sre@kernel.org> Signed-off-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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.
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.