linux-kernel - Re: [PATCHv3] w1: omap-hdq: Simplify driver with PM runtime autosuspend

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Message-ID: <20200417173644.03c99166@aktux>
Date:   Fri, 17 Apr 2020 17:36:44 +0200
From:   Andreas Kemnade <andreas@...nade.info>
To:     Tony Lindgren <tony@...mide.com>
Cc:     "H. Nikolaus Schaller" <hns@...delico.com>,
        Evgeniy Polyakov <zbr@...emap.net>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-omap <linux-omap@...r.kernel.org>,
        Adam Ford <aford173@...il.com>,
        "Andrew F . Davis" <afd@...com>, Vignesh R <vigneshr@...com>
Subject: Re: [PATCHv3] w1: omap-hdq: Simplify driver with PM runtime
 autosuspend

On Fri, 17 Apr 2020 08:14:47 -0700
Tony Lindgren <tony@...mide.com> wrote:

> * Tony Lindgren <tony@...mide.com> [200417 15:08]:
> > Maybe the PM runtime usecounts get unbalanced somewhere in the
> > driver where we end up with driver permanently in disabled state?  
> 
> Or it could be that with omap_hdq.c no longer blocking SoC
> deeper idle states, omap_hdq.c now loses context if you have
> omap3 off mode enabled during idle?
> 
I run twice (to get mmc access cached):

root@(none):/# sleep 15 ; /usr/local/bin/idledump >/run/idledump ; cat /sys/cla
ss/power_supply/bq27000-battery/current_now ; cat /run/idledump 
32665
     CM_IDLEST1_CORE 00000042
     CM_IDLEST3_CORE 00000000
     CM_FCLKEN1_CORE 00000000
     CM_FCLKEN3_CORE 00000002
     CM_CLKSTST_CORE 00000003
     CM_IDLEST_CKGEN 00000001
    CM_IDLEST2_CKGEN 00000000
       CM_FCLKEN_DSS 00000000
       CM_IDLEST_DSS 00000000
       CM_FCLKEN_CAM 00000000
       CM_IDLEST_CAM 00000000
       CM_FCLKEN_PER 00000000
       CM_IDLEST_PER 00030000
root@(none):/# 
root@(none):/# cat /sys/kernel/debug/pm_debug/count 
usbhost_pwrdm (ON),OFF:754,RET:9148,INA:0,ON:9903,RET-LOGIC-OFF:0,RET-MEMBANK1-OFF:0
sgx_pwrdm (OFF),OFF:1,RET:0,INA:1,ON:2,RET-LOGIC-OFF:0,RET-MEMBANK1-OFF:0
core_pwrdm (ON),OFF:0,RET:0,INA:0,ON:1,RET-LOGIC-OFF:0,RET-MEMBANK1-OFF:0,RET-MEMBANK2-OFF:0
per_pwrdm (ON),OFF:237,RET:1202,INA:0,ON:1440,RET-LOGIC-OFF:0,RET-MEMBANK1-OFF:0
dss_pwrdm (ON),OFF:754,RET:9148,INA:0,ON:9903,RET-LOGIC-OFF:0,RET-MEMBANK1-OFF:0
cam_pwrdm (OFF),OFF:1,RET:1,INA:0,ON:2,RET-LOGIC-OFF:0,RET-MEMBANK1-OFF:0
neon_pwrdm (ON),OFF:638,RET:9015,INA:250,ON:9904,RET-LOGIC-OFF:0
mpu_pwrdm (ON),OFF:638,RET:9014,INA:250,ON:9903,RET-LOGIC-OFF:0,RET-MEMBANK1-OFF:0
iva2_pwrdm (OFF),OFF:1,RET:1,INA:0,ON:2,RET-LOGIC-OFF:0,RET-MEMBANK1-OFF:0,RET-MEMBANK2-OFF:0,RET-MEMBANK3-OFF:0,RET-MEMBANK4-OFF:0
usbhost_clkdm->usbhost_pwrdm (1)
sgx_clkdm->sgx_pwrdm (0)
per_clkdm->per_pwrdm (16)
cam_clkdm->cam_pwrdm (0)
dss_clkdm->dss_pwrdm (1)
d2d_clkdm->core_pwrdm (0)
iva2_clkdm->iva2_pwrdm (0)
mpu_clkdm->mpu_pwrdm (0)
core_l4_clkdm->core_pwrdm (21)
core_l3_clkdm->core_pwrdm (1)
neon_clkdm->neon_pwrdm (0)

Regards,
Andreas