Nouveau - Dec 2019 - [PATCH] drm/dp_mst: add missed nv50_outp_release in nv50_msto_disable

nv50_msto_disable() does not call nv50_outp_release() to match
nv50_outp_acquire() like other disable().
Add the missed call to fix it.

Signed-off-by: Chuhong Yuan <hslester96 at gmail.com>
---
 drivers/gpu/drm/nouveau/dispnv50/disp.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/nouveau/dispnv50/disp.c
b/drivers/gpu/drm/nouveau/dispnv50/disp.c
index 549486f1d937..84e1417355cc 100644
--- a/drivers/gpu/drm/nouveau/dispnv50/disp.c
+++ b/drivers/gpu/drm/nouveau/dispnv50/disp.c
@@ -862,8 +862,10 @@ nv50_msto_disable(struct drm_encoder *encoder)
 
 	mstm->outp->update(mstm->outp, msto->head->base.index, NULL, 0,
0);
 	mstm->modified = true;
-	if (!--mstm->links)
+	if (!--mstm->links) {
 		mstm->disabled = true;
+		nv50_outp_release(mstm->outp);
+	}
 	msto->disabled = true;
 }
 
-- 
2.24.0

On Fri, 06 Dec 2019, Chuhong Yuan <hslester96 at gmail.com>
wrote:
> nv50_msto_disable() does not call nv50_outp_release() to match
> nv50_outp_acquire() like other disable().
> Add the missed call to fix it.
The subject prefix "drm/dp_mst" implies drm core change, but this is
about nouveau. Please fix.

BR,
Jani.
>
> Signed-off-by: Chuhong Yuan <hslester96 at gmail.com>
> ---
>  drivers/gpu/drm/nouveau/dispnv50/disp.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/nouveau/dispnv50/disp.c
b/drivers/gpu/drm/nouveau/dispnv50/disp.c
> index 549486f1d937..84e1417355cc 100644
> --- a/drivers/gpu/drm/nouveau/dispnv50/disp.c
> +++ b/drivers/gpu/drm/nouveau/dispnv50/disp.c
> @@ -862,8 +862,10 @@ nv50_msto_disable(struct drm_encoder *encoder)
>  
>  	mstm->outp->update(mstm->outp, msto->head->base.index,
NULL, 0, 0);
>  	mstm->modified = true;
> -	if (!--mstm->links)
> +	if (!--mstm->links) {
>  		mstm->disabled = true;
> +		nv50_outp_release(mstm->outp);
> +	}
>  	msto->disabled = true;
>  }
-- 
Jani Nikula, Intel Open Source Graphics Center

On Thu, 12 Dec 2019 at 18:14, Jani Nikula <jani.nikula at linux.intel.com>
wrote:
>
> On Fri, 06 Dec 2019, Chuhong Yuan <hslester96 at gmail.com> wrote:
> > nv50_msto_disable() does not call nv50_outp_release() to match
> > nv50_outp_acquire() like other disable().
> > Add the missed call to fix it.
This is intentional, and it's called at a later time
(nv50_mstm_prepare()) to avoid confusing HW.

Ben.
>
> The subject prefix "drm/dp_mst" implies drm core change, but this
is
> about nouveau. Please fix.
>
> BR,
> Jani.
>
> >
> > Signed-off-by: Chuhong Yuan <hslester96 at gmail.com>
> > ---
> >  drivers/gpu/drm/nouveau/dispnv50/disp.c | 4 +++-
> >  1 file changed, 3 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/gpu/drm/nouveau/dispnv50/disp.c
b/drivers/gpu/drm/nouveau/dispnv50/disp.c
> > index 549486f1d937..84e1417355cc 100644
> > --- a/drivers/gpu/drm/nouveau/dispnv50/disp.c
> > +++ b/drivers/gpu/drm/nouveau/dispnv50/disp.c
> > @@ -862,8 +862,10 @@ nv50_msto_disable(struct drm_encoder *encoder)
> >
> >       mstm->outp->update(mstm->outp,
msto->head->base.index, NULL, 0, 0);
> >       mstm->modified = true;
> > -     if (!--mstm->links)
> > +     if (!--mstm->links) {
> >               mstm->disabled = true;
> > +             nv50_outp_release(mstm->outp);
> > +     }
> >       msto->disabled = true;
> >  }
>
> --
> Jani Nikula, Intel Open Source Graphics Center
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