Re: [PATCH v2] media: qcom: camss: fix VFE pm domain off

[Bryan O'Donoghue]

On 29/11/2024 22:45, barnabas.czeman@xxxxxxxxxxxxxx wrote:
> On 2024-11-29 23:08, Bryan O'Donoghue wrote:
> > On 29/11/2024 13:46, barnabas.czeman@xxxxxxxxxxxxxx wrote:
> > > On 2024-11-29 13:25, Bryan O'Donoghue wrote:
> > > > On 29/11/2024 11:44, barnabas.czeman@xxxxxxxxxxxxxx wrote:
> > > > > > The change does not describe how to reproduce the problem, which 
> > > > > > commit
> > > > > > base is tested, which platform is testes, there is no enough 
> > > > > > information,
> > > > > > unfortunately.
> > > > > I can reproduce the problem with megapixels-sensorprofile on 
> > > > > msm8953 and
> > > > > it can be reproduced with megapixels on msm8996.
> > > > > The base is the last commit on next.
> > > >
> > > > Can you verify if vfe_domain_on has run and if so whether or not 
> > > > genpd_link is NULL when that function exists.
> > > I have added some debug logs it seems pm_domain_on and pm_domain_off 
> > > is called twice on the same object.
> > > [   63.473360] qcom-camss 1b00020.camss: pm_domain_on 19842ce8 link 
> > > 42973800
> > > [   63.481524] qcom-camss 1b00020.camss: pm_domain_on 19840080 link 
> > > 4e413800
> > > [   63.481555] qcom-camss 1b00020.camss: pm_domain_on 19842ce8 link 
> > > 42973800
> > > [   63.481632] qcom-camss 1b00020.camss: pm_domain_off 19840080 link 
> > > 4e413800
> > > [   63.481641] qcom-camss 1b00020.camss: pm_domain_off 19842ce8 link 
> > > 42973800
> > > [   63.654004] qcom-camss 1b00020.camss: pm_domain_off 19842ce8 link 0
> > > > That's the question.
> > > >
> > > > ---
> > > > bod
> >
> > Could you provide this output ?
> >
> > index 80a62ba112950..b25b8f6b00be1 100644
> > --- a/drivers/media/platform/qcom/camss/camss-vfe.c
> > +++ b/drivers/media/platform/qcom/camss/camss-vfe.c
> > @@ -595,6 +595,9 @@ void vfe_isr_reset_ack(struct vfe_device *vfe)
> >   */
> >  void vfe_pm_domain_off(struct vfe_device *vfe)
> >  {
> > +dev_info(camss->dev, "%s VFE %d genpd %pK genpd_link %pK\n",
> > +        __func__, vfe->id, vfe->genpd, vfe->genpd_link);
> > +
> >         if (!vfe->genpd)
> >                 return;
> >
> > @@ -609,7 +612,8 @@ void vfe_pm_domain_off(struct vfe_device *vfe)
> >  int vfe_pm_domain_on(struct vfe_device *vfe)
> >  {
> >         struct camss *camss = vfe->camss;
> > -
> > +dev_info(camss->dev, "%s VFE %d genpd %pK genpd_link %pK\n",
> > +        __func__, vfe->id, vfe->genpd, vfe->genpd_link);
> >         if (!vfe->genpd)
> >                 return 0;
> >
> > ---
> > bod
> I think logging in pm_domain_on should be placed after device_link_add 
> because only NULL
> will be visible.
> [   83.040694] qcom-camss 1b00020.camss: vfe_pm_domain_on VFE 1 genpd 
> 000000009bd8355f genpd_link 0000000000000000
> [   83.049293] qcom-camss 1b00020.camss: vfe_pm_domain_on VFE 0 genpd 
> 00000000bfb65e7c genpd_link 0000000000000000
> [   83.049353] qcom-camss 1b00020.camss: vfe_pm_domain_on VFE 1 genpd 
> 000000009bd8355f genpd_link 00000000ccb0acd9
> [   83.049641] qcom-camss 1b00020.camss: vfe_pm_domain_off VFE 0 genpd 
> 00000000bfb65e7c genpd_link 00000000348ac3c1
> [   83.049654] qcom-camss 1b00020.camss: vfe_pm_domain_off VFE 1 genpd 
> 000000009bd8355f genpd_link 00000000ccb0acd9
> [   83.241498] qcom-camss 1b00020.camss: vfe_pm_domain_off VFE 1 genpd 
> 000000009bd8355f genpd_link 0000000000000000

Could you add

+++ b/drivers/media/platform/qcom/camss/camss-vfe.c
@@ -786,7 +786,7 @@ int vfe_get(struct vfe_device *vfe)
        int ret;

        mutex_lock(&vfe->power_lock);
-
+dev_info(vfe->camss->dev, "%s vfe %d power_count %d\n", __func__, 
vfe->id, vfe->power_count);
        if (vfe->power_count == 0) {
                ret = vfe->res->hw_ops->pm_domain_on(vfe);
                if (ret < 0)
@@ -823,6 +823,7 @@ int vfe_get(struct vfe_device *vfe)

        mutex_unlock(&vfe->power_lock);

+dev_info(camss->vfe->dev, "%s vfe %d err=%d\n", __func__, 
camss->vfe->id, 0);
        return 0;

 error_reset:
@@ -835,7 +836,7 @@ int vfe_get(struct vfe_device *vfe)

 error_pm_domain:
        mutex_unlock(&vfe->power_lock);
-
+dev_info(camss->vfe->dev, "%s vfe %d err=%d\n", __func__, 
camss->vfe->id, ret);
        return ret;
 }

?

---
bod