Re: new PM branch available

Koen Kooi <k.kooi@xxxxxxxxxxxxxxxxxx> · Fri, 23 Jan 2009 13:10:48 +0100

Op 23 jan 2009, om 13:00 heeft Nayak, Rajendra het volgende geschreven:



-----Original Message-----
From: Högander Jouni [mailto:jouni.hogander@xxxxxxxxx]
Sent: Friday, January 23, 2009 4:52 PM
To: Nayak, Rajendra
Cc: Kevin Hilman; linux-omap@xxxxxxxxxxxxxxx
Subject: Re: new PM branch available

"ext Nayak, Rajendra" <rnayak@xxxxxx> writes:

I did some testing today on my 3.0GP 3430SDP. This is with
the omap_3430sdp_min_defconfig.

1) Idle.
echo -n 1 > /sys/power/clocks_off_while_idle
echo -n 1 > /sys/power/enable_off
Could not hit RET. something seems to be still active. Not
sure if it could be something
to do with this error that's thrown while bootup

<6>Disabling unused clock "dpll5_ck"
Disabling unused clock "dpll5_ck"
<3>clock: dpll5_ck failed transition to 'locked'
clock: dpll5_ck failed transition to 'locked'

This is the same results I see on my SDP.

Looking at the registers, I am pretty sure it is the D2D
clockdomain
that still has activity, but due to very poor Stacked-mode
docs and no
responses to the D2D questions asked to TI I have not been able to
figure this one out.

Help debugging this would be greatly appreciated.

I looked some more into this today and saw that the hang is
indeed caused
due to some kind of debug console going dead. The system
was still looping in the
idle thread. I could even do a telnet remotely to my board and take
some debug dumps..

This might help you:

Yup, this does help. There's no hang now either in idle or in suspend.
Not sure why this was affecting only the SDP while the pm branch seems
to function without this for beagle and other omap3 platforms?

I get 'hangs' on the beagle as well with the PM branch. They mostly  
seem to happen when I boot a fresh rootfs and the packagemanager runs  
a lot of postinst scripts without any form of user interaction.

regards,

Koen

diff --git a/arch/arm/mach-omap2/pm34xx.c
b/arch/arm/mach-omap2/pm34xx.c
index b2db0ba..266e4f5 100644
--- a/arch/arm/mach-omap2/pm34xx.c
+++ b/arch/arm/mach-omap2/pm34xx.c
@@ -401,6 +401,8 @@ void omap_sram_idle(void)
                       omap3_prcm_restore_context();
                       omap3_sram_restore_context();
               }
+               omap_uart_resume_idle(0);
+               omap_uart_resume_idle(1);
               if (core_next_state == PWRDM_POWER_OFF)
                       prm_clear_mod_reg_bits(OMAP3430_AUTO_OFF,
                                              OMAP3430_GR_MOD,

--
Jouni Högander


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