Re: Suspend to RAM broken on BeagleBoard ?

[Thomas Petazzoni <thomas.petazzoni@free-electrons.com>]

Hello,

On Mon, 13 Sep 2010 07:56:54 -0700
Kevin Hilman <khilman@deeprootsystems.com> wrote:

> Looks like DSS has not been initialized, so is not hitting RET.
> 
> Do you have the DSS driver enabled and built-in?  Without this (and
> until we have DSS converted to hwmod) the DSS HW is not in a state that
> can hit the low power mode.  If the DSS driver is allowed to initialize,
> even without a panel, it should set the DSS HW in a state that will then
> allow RET.

Indeed:

$ grep DSS .config
# CONFIG_OMAP2_DSS is not set

It's not enabled simply because it isn't enabled by omap3_defconfig. So
maybe it should also be fixed for this ?

I have zero knowledge of DSS, but shouldn't the kernel be able to
suspend properly even if the DSS driver is disabled ? But maybe it's
too complicated to have the DSS init sequence required to allow the
system to hit RET outside the DSS driver. Thoughts ?

Regards,

Thomas
-- 
Thomas Petazzoni, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com