[PATCH 00/05] OMAP3: CPUidle driver

[PATCH 00/05] OMAP3: CPUidle driver

[Rajendra Nayak]

Hi,

This patch set implements Cpuidle driver for OMAP3 platforms. It is validated on the 3430SDP (using the 
omap_3430sdp_min_defconfig) and applies on the pm-20081006 branch.

The following C states are defined and used 

 *      C0 . System executing code (Not an idle state)
 *      C1 . MPU WFI + Core active
 *      C2 . MPU CSWR + Core active
 *      C3 . MPU OFF + Core active
 *      C4 . MPU CSWR + Core CSWR
 *      C5 . MPU OFF + Core CSWR
 *      C6 . MPU OFF + Core OFF

CPUidle support is not enabled by default in any of the defconfigs and hence has to enabled seperately 
if you plan to test these patches.

CPUIdle ---> [*] CPU idle PM support

regards,
Rajendra

Re: [PATCH 00/05] OMAP3: CPUidle driver

[Kevin Hilman]

"Rajendra Nayak" <rnayak@ti.com> writes:

> This patch set implements Cpuidle driver for OMAP3 platforms. It is
> validated on the 3430SDP (using the omap_3430sdp_min_defconfig) and
> applies on the pm-20081006 branch.

Excellent.  Thank you.  I'll pull into pm-20081006 today.

One question: You have C6 to hit chip-off, but it is never enabled.
Has this been tested?  Enabling it allows me to hit chip OFF, but it
never comes back from OFF-mode.  I will push some patches to make this
work with /sys/power/enable_off_mode.

Some minor problems that I will fixup when rebasing to the next pm
branch:

 - You removed C0, but all the comments still refer to it
 - /sys/power/enable_off_mode doesn't affect off-mode states
   in CPUidle

patch 1:
 - I still don't like the #ifdefs for the init sequence.

patch 2:
 - checkpatch warning

Kevin

> The following C states are defined and used 
>
>  *      C0 . System executing code (Not an idle state)
>  *      C1 . MPU WFI + Core active
>  *      C2 . MPU CSWR + Core active
>  *      C3 . MPU OFF + Core active
>  *      C4 . MPU CSWR + Core CSWR
>  *      C5 . MPU OFF + Core CSWR
>  *      C6 . MPU OFF + Core OFF
>
> CPUidle support is not enabled by default in any of the defconfigs and hence has to enabled seperately 
> if you plan to test these patches.
>
> CPUIdle ---> [*] CPU idle PM support
>
> regards,
> Rajendra

Re: [PATCH 00/05] OMAP3: CPUidle driver

[Kevin Hilman]

Kevin Hilman <khilman@deeprootsystems.com> writes:

> "Rajendra Nayak" <rnayak@ti.com> writes:
>
>> This patch set implements Cpuidle driver for OMAP3 platforms. It is
>> validated on the 3430SDP (using the omap_3430sdp_min_defconfig) and
>> applies on the pm-20081006 branch.
>
> Excellent.  Thank you.  I'll pull into pm-20081006 today.
>
> One question: You have C6 to hit chip-off, but it is never enabled.
> Has this been tested?  Enabling it allows me to hit chip OFF, but it
> never comes back from OFF-mode.  I will push some patches to make this
> work with /sys/power/enable_off_mode.

I got this to work on custom HW, but not on 3430SDP.  Can you confirm
whether or not you can use C6 on 3430SDP?  Off-in-idle without CPUidle
seems to work, but not with CPUidle + C6.

Kevin

> Some minor problems that I will fixup when rebasing to the next pm
> branch:
>
>  - You removed C0, but all the comments still refer to it
>  - /sys/power/enable_off_mode doesn't affect off-mode states
>    in CPUidle
>
> patch 1:
>  - I still don't like the #ifdefs for the init sequence.
>
> patch 2:
>  - checkpatch warning
>
> Kevin
>
>> The following C states are defined and used 
>>
>>  *      C0 . System executing code (Not an idle state)
>>  *      C1 . MPU WFI + Core active
>>  *      C2 . MPU CSWR + Core active
>>  *      C3 . MPU OFF + Core active
>>  *      C4 . MPU CSWR + Core CSWR
>>  *      C5 . MPU OFF + Core CSWR
>>  *      C6 . MPU OFF + Core OFF
>>
>> CPUidle support is not enabled by default in any of the defconfigs and hence has to enabled seperately 
>> if you plan to test these patches.
>>
>> CPUIdle ---> [*] CPU idle PM support
>>
>> regards,
>> Rajendra

RE: [PATCH 00/05] OMAP3: CPUidle driver

[Rajendra Nayak]

> -----Original Message-----
> From: linux-omap-owner@vger.kernel.org 
> [mailto:linux-omap-owner@vger.kernel.org] On Behalf Of Kevin Hilman
> Sent: Thursday, October 09, 2008 8:15 PM
> To: Rajendra Nayak
> Cc: linux-omap@vger.kernel.org
> Subject: Re: [PATCH 00/05] OMAP3: CPUidle driver
> 
> Kevin Hilman <khilman@deeprootsystems.com> writes:
> 
> > "Rajendra Nayak" <rnayak@ti.com> writes:
> >
> >> This patch set implements Cpuidle driver for OMAP3 platforms. It is
> >> validated on the 3430SDP (using the omap_3430sdp_min_defconfig) and
> >> applies on the pm-20081006 branch.
> >
> > Excellent.  Thank you.  I'll pull into pm-20081006 today.
> >
> > One question: You have C6 to hit chip-off, but it is never enabled.
> > Has this been tested?  Enabling it allows me to hit chip OFF, but it
> > never comes back from OFF-mode.  I will push some patches 
> to make this
> > work with /sys/power/enable_off_mode.
> 
> I got this to work on custom HW, but not on 3430SDP.  Can you confirm
> whether or not you can use C6 on 3430SDP?  Off-in-idle without CPUidle
> seems to work, but not with CPUidle + C6.

Ok.. I'll try and fix this. I seem to have missed enabling this after all
the comment fixes that I did. Maybe I broke something.

> 
> Kevin
> 
> > Some minor problems that I will fixup when rebasing to the next pm
> > branch:
> >
> >  - You removed C0, but all the comments still refer to it
> >  - /sys/power/enable_off_mode doesn't affect off-mode states
> >    in CPUidle
> >
> > patch 1:
> >  - I still don't like the #ifdefs for the init sequence.
> >
> > patch 2:
> >  - checkpatch warning
> >
> > Kevin
> >
> >> The following C states are defined and used 
> >>
> >>  *      C0 . System executing code (Not an idle state)
> >>  *      C1 . MPU WFI + Core active
> >>  *      C2 . MPU CSWR + Core active
> >>  *      C3 . MPU OFF + Core active
> >>  *      C4 . MPU CSWR + Core CSWR
> >>  *      C5 . MPU OFF + Core CSWR
> >>  *      C6 . MPU OFF + Core OFF
> >>
> >> CPUidle support is not enabled by default in any of the 
> defconfigs and hence has to enabled seperately 
> >> if you plan to test these patches.
> >>
> >> CPUIdle ---> [*] CPU idle PM support
> >>
> >> regards,
> >> Rajendra
> --
> To unsubscribe from this list: send the line "unsubscribe 
> linux-omap" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> 
> 

RE: [PATCH 00/05] OMAP3: CPUidle driver

[Rajendra Nayak]

> -----Original Message-----
> From: linux-omap-owner@vger.kernel.org 
> [mailto:linux-omap-owner@vger.kernel.org] On Behalf Of Kevin Hilman
> Sent: Thursday, October 09, 2008 8:15 PM
> To: Rajendra Nayak
> Cc: linux-omap@vger.kernel.org
> Subject: Re: [PATCH 00/05] OMAP3: CPUidle driver
> 
> Kevin Hilman <khilman@deeprootsystems.com> writes:
> 
> > "Rajendra Nayak" <rnayak@ti.com> writes:
> >
> >> This patch set implements Cpuidle driver for OMAP3 platforms. It is
> >> validated on the 3430SDP (using the omap_3430sdp_min_defconfig) and
> >> applies on the pm-20081006 branch.
> >
> > Excellent.  Thank you.  I'll pull into pm-20081006 today.
> >
> > One question: You have C6 to hit chip-off, but it is never enabled.
> > Has this been tested?  Enabling it allows me to hit chip OFF, but it
> > never comes back from OFF-mode.  I will push some patches 
> to make this
> > work with /sys/power/enable_off_mode.
> 
> I got this to work on custom HW, but not on 3430SDP.  Can you confirm
> whether or not you can use C6 on 3430SDP?  Off-in-idle without CPUidle
> seems to work, but not with CPUidle + C6.
> 
> 

Hi Kevin,

With just this patch below I could see that I was able to hit sysoff even
with CPUidle.

Doing this I could see the SYSOFF LED toggle..
# echo -n 1 > /sys/power/clocks_off_while_idle
# echo -n 1 > /sys/power/sleep_while_idle
# echo -n 1 > /sys/power/voltage_off_while_idle
# echo -n 1 > /sys/power/enable_off_mode

And doing this stops the toggle..
# echo -n 0 > /sys/power/enable_off_mode

Was there any other issue you saw with CPUidle + C6?

Rajendra
---
 arch/arm/mach-omap2/cpuidle34xx.c |    2 +-
 1 files changed, 1 insertion(+), 1 deletion(-)

Index: linux-omap-2.6/arch/arm/mach-omap2/cpuidle34xx.c
===================================================================
--- linux-omap-2.6.orig/arch/arm/mach-omap2/cpuidle34xx.c	2008-10-14 14:46:21.000000000 +0530
+++ linux-omap-2.6/arch/arm/mach-omap2/cpuidle34xx.c	2008-10-14 14:46:24.000000000 +0530
@@ -191,7 +191,7 @@ void omap_init_power_states(void)
 				CPUIDLE_FLAG_CHECK_BM;
 
 	/* C6 . MPU OFF + Core OFF */
-	omap3_power_states[OMAP3_STATE_C6].valid = 0;
+	omap3_power_states[OMAP3_STATE_C6].valid = 1;
 	omap3_power_states[OMAP3_STATE_C6].type = OMAP3_STATE_C6;
 	omap3_power_states[OMAP3_STATE_C6].sleep_latency = 10000;
 	omap3_power_states[OMAP3_STATE_C6].wakeup_latency = 30000;


> 
> > Some minor problems that I will fixup when rebasing to the next pm
> > branch:
> >
> >  - You removed C0, but all the comments still refer to it
> >  - /sys/power/enable_off_mode doesn't affect off-mode states
> >    in CPUidle
> >
> > patch 1:
> >  - I still don't like the #ifdefs for the init sequence.
> >
> > patch 2:
> >  - checkpatch warning
> >
> > Kevin
> >
> >> The following C states are defined and used 
> >>
> >>  *      C0 . System executing code (Not an idle state)
> >>  *      C1 . MPU WFI + Core active
> >>  *      C2 . MPU CSWR + Core active
> >>  *      C3 . MPU OFF + Core active
> >>  *      C4 . MPU CSWR + Core CSWR
> >>  *      C5 . MPU OFF + Core CSWR
> >>  *      C6 . MPU OFF + Core OFF
> >>
> >> CPUidle support is not enabled by default in any of the 
> defconfigs and hence has to enabled seperately 
> >> if you plan to test these patches.
> >>
> >> CPUIdle ---> [*] CPU idle PM support
> >>
> >> regards,
> >> Rajendra
> --
> To unsubscribe from this list: send the line "unsubscribe 
> linux-omap" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> 
> 

Re: [PATCH 00/05] OMAP3: CPUidle driver

[Kevin Hilman]

Rajendra Nayak wrote:
>> -----Original Message-----
>> From: linux-omap-owner@vger.kernel.org 
>> [mailto:linux-omap-owner@vger.kernel.org] On Behalf Of Kevin Hilman
>> Sent: Thursday, October 09, 2008 8:15 PM
>> To: Rajendra Nayak
>> Cc: linux-omap@vger.kernel.org
>> Subject: Re: [PATCH 00/05] OMAP3: CPUidle driver
>>
>> Kevin Hilman <khilman@deeprootsystems.com> writes:
>>
>>> "Rajendra Nayak" <rnayak@ti.com> writes:
>>>
>>>> This patch set implements Cpuidle driver for OMAP3 platforms. It is
>>>> validated on the 3430SDP (using the omap_3430sdp_min_defconfig) and
>>>> applies on the pm-20081006 branch.
>>> Excellent.  Thank you.  I'll pull into pm-20081006 today.
>>>
>>> One question: You have C6 to hit chip-off, but it is never enabled.
>>> Has this been tested?  Enabling it allows me to hit chip OFF, but it
>>> never comes back from OFF-mode.  I will push some patches 
>> to make this
>>> work with /sys/power/enable_off_mode.
>> I got this to work on custom HW, but not on 3430SDP.  Can you confirm
>> whether or not you can use C6 on 3430SDP?  Off-in-idle without CPUidle
>> seems to work, but not with CPUidle + C6.
>>
>>
> 
> Hi Kevin,
> 
> With just this patch below I could see that I was able to hit sysoff even
> with CPUidle.
> 
> Doing this I could see the SYSOFF LED toggle..
> # echo -n 1 > /sys/power/clocks_off_while_idle
> # echo -n 1 > /sys/power/sleep_while_idle
> # echo -n 1 > /sys/power/voltage_off_while_idle
> # echo -n 1 > /sys/power/enable_off_mode
> 
> And doing this stops the toggle..
> # echo -n 0 > /sys/power/enable_off_mode
> 
> Was there any other issue you saw with CPUidle + C6?
> 

Yes, I was seeing hangs as soon as I enabled off-mode.

I'm currently on the road and when I get home (Wed.) I won't have access 
  to an SDP for a while, so I'll trust you on this one.  Maybe I need an 
updated u-boot on my SDP?

Kevin

>  arch/arm/mach-omap2/cpuidle34xx.c |    2 +-
>  1 files changed, 1 insertion(+), 1 deletion(-)
> 
> Index: linux-omap-2.6/arch/arm/mach-omap2/cpuidle34xx.c
> ===================================================================
> --- linux-omap-2.6.orig/arch/arm/mach-omap2/cpuidle34xx.c	2008-10-14 14:46:21.000000000 +0530
> +++ linux-omap-2.6/arch/arm/mach-omap2/cpuidle34xx.c	2008-10-14 14:46:24.000000000 +0530
> @@ -191,7 +191,7 @@ void omap_init_power_states(void)
>  				CPUIDLE_FLAG_CHECK_BM;
>  
>  	/* C6 . MPU OFF + Core OFF */
> -	omap3_power_states[OMAP3_STATE_C6].valid = 0;
> +	omap3_power_states[OMAP3_STATE_C6].valid = 1;
>  	omap3_power_states[OMAP3_STATE_C6].type = OMAP3_STATE_C6;
>  	omap3_power_states[OMAP3_STATE_C6].sleep_latency = 10000;
>  	omap3_power_states[OMAP3_STATE_C6].wakeup_latency = 30000;
> 
> 
>>> Some minor problems that I will fixup when rebasing to the next pm
>>> branch:
>>>
>>>  - You removed C0, but all the comments still refer to it
>>>  - /sys/power/enable_off_mode doesn't affect off-mode states
>>>    in CPUidle
>>>
>>> patch 1:
>>>  - I still don't like the #ifdefs for the init sequence.
>>>
>>> patch 2:
>>>  - checkpatch warning
>>>
>>> Kevin
>>>
>>>> The following C states are defined and used 
>>>>
>>>>  *      C0 . System executing code (Not an idle state)
>>>>  *      C1 . MPU WFI + Core active
>>>>  *      C2 . MPU CSWR + Core active
>>>>  *      C3 . MPU OFF + Core active
>>>>  *      C4 . MPU CSWR + Core CSWR
>>>>  *      C5 . MPU OFF + Core CSWR
>>>>  *      C6 . MPU OFF + Core OFF
>>>>
>>>> CPUidle support is not enabled by default in any of the 
>> defconfigs and hence has to enabled seperately 
>>>> if you plan to test these patches.
>>>>
>>>> CPUIdle ---> [*] CPU idle PM support
>>>>
>>>> regards,
>>>> Rajendra
>> --
>> To unsubscribe from this list: send the line "unsubscribe 
>> linux-omap" in
>> the body of a message to majordomo@vger.kernel.org
>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>
>>
> 

RE: [PATCH 00/05] OMAP3: CPUidle driver

[Rajendra Nayak]

> -----Original Message-----
> From: Kevin Hilman [mailto:khilman@deeprootsystems.com] 
> Sent: Thursday, October 09, 2008 6:57 PM
> To: Rajendra Nayak
> Cc: linux-omap@vger.kernel.org
> Subject: Re: [PATCH 00/05] OMAP3: CPUidle driver
> 
> "Rajendra Nayak" <rnayak@ti.com> writes:
> 
> > This patch set implements Cpuidle driver for OMAP3 platforms. It is
> > validated on the 3430SDP (using the omap_3430sdp_min_defconfig) and
> > applies on the pm-20081006 branch.
> 
> Excellent.  Thank you.  I'll pull into pm-20081006 today.
> 
> One question: You have C6 to hit chip-off, but it is never enabled.
> Has this been tested?  Enabling it allows me to hit chip OFF, but it
> never comes back from OFF-mode.  I will push some patches to make this
> work with /sys/power/enable_off_mode.

Yes, that was something I missed out in those patches. I will send in a patch
to do that if you have'nt done it already.

> 
> Some minor problems that I will fixup when rebasing to the next pm
> branch:
> 
>  - You removed C0, but all the comments still refer to it
>  - /sys/power/enable_off_mode doesn't affect off-mode states
>    in CPUidle
> 
> patch 1:
>  - I still don't like the #ifdefs for the init sequence.
> 
> patch 2:
>  - checkpatch warning

That was for an extern in a C file (cpuidle34xx.c) and I was'nt sure which 
header was the right place for it (since now we don't have a cpuidle34xx.h).
So I kind of left it there.

> 
> Kevin
> 
> > The following C states are defined and used 
> >
> >  *      C0 . System executing code (Not an idle state)
> >  *      C1 . MPU WFI + Core active
> >  *      C2 . MPU CSWR + Core active
> >  *      C3 . MPU OFF + Core active
> >  *      C4 . MPU CSWR + Core CSWR
> >  *      C5 . MPU OFF + Core CSWR
> >  *      C6 . MPU OFF + Core OFF
> >
> > CPUidle support is not enabled by default in any of the 
> defconfigs and hence has to enabled seperately 
> > if you plan to test these patches.
> >
> > CPUIdle ---> [*] CPU idle PM support
> >
> > regards,
> > Rajendra
> 
>