lkml.org 
[lkml]   [2016]   [Apr]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: Nokia N900 retention mode in v4.6, camera buttons fun
Hi,

On Thu, Apr 21, 2016 at 03:04:50PM +0200, Pali Rohár wrote:
> > CONFIG_HSI breaks power management completely, so power management
> > with modem will be another topic.
>
> Sebastian, any idea why power management does not work for HSI?

I wasn't aware, that pm_runtime_irq_safe() basically breaks runtime
PM until Tony's fix for musb (even though it's logical when thinking
about it). Currently omap-ssi and omap-ssi-port make use of
pm_runtime_irq_safe().

Since pm_runtime_get_sync/pm_runtime_put_sync is called from
tasklets in omap-ssi (and omap-ssi-port) it cannot be simply
removed. So fixing PM for the ssi controller requires reworking
the driver in a non trivial way.

-- Sebastian
[unhandled content-type:application/pgp-signature]
\
 
 \ /
  Last update: 2016-04-29 22:41    [W:0.184 / U:1.328 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site