Re: [PATCH V4] drm/dp_mst: Retrieve extended DPCD caps for topology manager

2020-09-23 Thread Lyude Paul 
On Wed, 2020-09-23 at 10:16 +0800, Koba Ko wrote:
> Thanks for the review.
> Sorry for that I thought the review tag should be appended by myself.
> One thing to confirm with you, will you or I push this patch to drm-misc-
> next ?

I already pushed it with the change, so everything is all set

> Thanks a lot.
> 
> On Wed, Sep 23, 2020 at 2:01 AM Lyude Paul  wrote:
> > One last change I realized we should do is print the name of the AUX
> > adapter
> > in question. I don't mind just adding that myself before I push it though
> > so
> > you don't need to send a respin.
> > 
> > Going to go push this to drm-misc-next, thanks!
> > 
> > On Tue, 2020-09-22 at 14:53 +0800, Koba Ko wrote:
> > > As per DP-1.3, First check DP_EXTENDED_RECEIVER_CAP_FIELD_PRESENT.
> > > If DP_EXTENDED_RECEIVER_CAP_FIELD_PRESENT is 1,read the DP_DP13_DPCD_REV
> > > to
> > > get the faster capability.
> > > If DP_EXTENDED_RECEIVER_CAP_FIELD_PRESENT is 0,read DP_DPCD_REV.
> > > 
> > > Signed-off-by: Koba Ko 
> > > Reviewed-by: Lyude Paul 
> > > ---
> > >  drivers/gpu/drm/drm_dp_mst_topology.c | 6 +++---
> > >  1 file changed, 3 insertions(+), 3 deletions(-)
> > > 
> > > diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c
> > > b/drivers/gpu/drm/drm_dp_mst_topology.c
> > > index e87542533640..63f8809b9aa4 100644
> > > --- a/drivers/gpu/drm/drm_dp_mst_topology.c
> > > +++ b/drivers/gpu/drm/drm_dp_mst_topology.c
> > > @@ -3686,9 +3686,9 @@ int drm_dp_mst_topology_mgr_set_mst(struct
> > > drm_dp_mst_topology_mgr *mgr, bool ms
> > >   WARN_ON(mgr->mst_primary);
> > > 
> > >   /* get dpcd info */
> > > - ret = drm_dp_dpcd_read(mgr->aux, DP_DPCD_REV, mgr->dpcd,
> > > DP_RECEIVER_CAP_SIZE);
> > > - if (ret != DP_RECEIVER_CAP_SIZE) {
> > > - DRM_DEBUG_KMS("failed to read DPCD\n");
> > > + ret = drm_dp_read_dpcd_caps(mgr->aux, mgr->dpcd);
> > > + if (ret < 0) {
> > > + drm_dbg_kms(mgr->dev, "failed to read DPCD, ret
> > > %d\n",
> > > ret);
> > >   goto out_unlock;
> > >   }
> > > 
> > --
> > Cheers,
> > Lyude Paul (she/her)
> > Software Engineer at Red Hat
> > 
-- 
Cheers,
Lyude Paul (she/her)
Software Engineer at Red Hat

Re: [PATCH V4] drm/dp_mst: Retrieve extended DPCD caps for topology manager

2020-09-22 Thread Koba Ko 
Thanks for the review.
Sorry for that I thought the review tag should be appended by myself.
One thing to confirm with you, will you or I push this patch to drm-misc-next ?

Thanks a lot.

On Wed, Sep 23, 2020 at 2:01 AM Lyude Paul  wrote:
>
> One last change I realized we should do is print the name of the AUX adapter
> in question. I don't mind just adding that myself before I push it though so
> you don't need to send a respin.
>
> Going to go push this to drm-misc-next, thanks!
>
> On Tue, 2020-09-22 at 14:53 +0800, Koba Ko wrote:
> > As per DP-1.3, First check DP_EXTENDED_RECEIVER_CAP_FIELD_PRESENT.
> > If DP_EXTENDED_RECEIVER_CAP_FIELD_PRESENT is 1,read the DP_DP13_DPCD_REV to
> > get the faster capability.
> > If DP_EXTENDED_RECEIVER_CAP_FIELD_PRESENT is 0,read DP_DPCD_REV.
> >
> > Signed-off-by: Koba Ko 
> > Reviewed-by: Lyude Paul 
> > ---
> >  drivers/gpu/drm/drm_dp_mst_topology.c | 6 +++---
> >  1 file changed, 3 insertions(+), 3 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c
> > b/drivers/gpu/drm/drm_dp_mst_topology.c
> > index e87542533640..63f8809b9aa4 100644
> > --- a/drivers/gpu/drm/drm_dp_mst_topology.c
> > +++ b/drivers/gpu/drm/drm_dp_mst_topology.c
> > @@ -3686,9 +3686,9 @@ int drm_dp_mst_topology_mgr_set_mst(struct
> > drm_dp_mst_topology_mgr *mgr, bool ms
> >   WARN_ON(mgr->mst_primary);
> >
> >   /* get dpcd info */
> > - ret = drm_dp_dpcd_read(mgr->aux, DP_DPCD_REV, mgr->dpcd,
> > DP_RECEIVER_CAP_SIZE);
> > - if (ret != DP_RECEIVER_CAP_SIZE) {
> > - DRM_DEBUG_KMS("failed to read DPCD\n");
> > + ret = drm_dp_read_dpcd_caps(mgr->aux, mgr->dpcd);
> > + if (ret < 0) {
> > + drm_dbg_kms(mgr->dev, "failed to read DPCD, ret %d\n",
> > ret);
> >   goto out_unlock;
> >   }
> >
> --
> Cheers,
> Lyude Paul (she/her)
> Software Engineer at Red Hat
>

Re: [PATCH V4] drm/dp_mst: Retrieve extended DPCD caps for topology manager

2020-09-22 Thread Lyude Paul 
One last change I realized we should do is print the name of the AUX adapter
in question. I don't mind just adding that myself before I push it though so
you don't need to send a respin.

Going to go push this to drm-misc-next, thanks!

On Tue, 2020-09-22 at 14:53 +0800, Koba Ko wrote:
> As per DP-1.3, First check DP_EXTENDED_RECEIVER_CAP_FIELD_PRESENT.
> If DP_EXTENDED_RECEIVER_CAP_FIELD_PRESENT is 1,read the DP_DP13_DPCD_REV to
> get the faster capability.
> If DP_EXTENDED_RECEIVER_CAP_FIELD_PRESENT is 0,read DP_DPCD_REV.
> 
> Signed-off-by: Koba Ko 
> Reviewed-by: Lyude Paul 
> ---
>  drivers/gpu/drm/drm_dp_mst_topology.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c
> b/drivers/gpu/drm/drm_dp_mst_topology.c
> index e87542533640..63f8809b9aa4 100644
> --- a/drivers/gpu/drm/drm_dp_mst_topology.c
> +++ b/drivers/gpu/drm/drm_dp_mst_topology.c
> @@ -3686,9 +3686,9 @@ int drm_dp_mst_topology_mgr_set_mst(struct
> drm_dp_mst_topology_mgr *mgr, bool ms
>   WARN_ON(mgr->mst_primary);
>  
>   /* get dpcd info */
> - ret = drm_dp_dpcd_read(mgr->aux, DP_DPCD_REV, mgr->dpcd,
> DP_RECEIVER_CAP_SIZE);
> - if (ret != DP_RECEIVER_CAP_SIZE) {
> - DRM_DEBUG_KMS("failed to read DPCD\n");
> + ret = drm_dp_read_dpcd_caps(mgr->aux, mgr->dpcd);
> + if (ret < 0) {
> + drm_dbg_kms(mgr->dev, "failed to read DPCD, ret %d\n",
> ret);
>   goto out_unlock;
>   }
>  
-- 
Cheers,
Lyude Paul (she/her)
Software Engineer at Red Hat

[PATCH V4] drm/dp_mst: Retrieve extended DPCD caps for topology manager

2020-09-22 Thread Koba Ko 
As per DP-1.3, First check DP_EXTENDED_RECEIVER_CAP_FIELD_PRESENT.
If DP_EXTENDED_RECEIVER_CAP_FIELD_PRESENT is 1,read the DP_DP13_DPCD_REV to
get the faster capability.
If DP_EXTENDED_RECEIVER_CAP_FIELD_PRESENT is 0,read DP_DPCD_REV.

Signed-off-by: Koba Ko 
Reviewed-by: Lyude Paul 
---
 drivers/gpu/drm/drm_dp_mst_topology.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c 
b/drivers/gpu/drm/drm_dp_mst_topology.c
index e87542533640..63f8809b9aa4 100644
--- a/drivers/gpu/drm/drm_dp_mst_topology.c
+++ b/drivers/gpu/drm/drm_dp_mst_topology.c
@@ -3686,9 +3686,9 @@ int drm_dp_mst_topology_mgr_set_mst(struct 
drm_dp_mst_topology_mgr *mgr, bool ms
WARN_ON(mgr->mst_primary);
 
/* get dpcd info */
-   ret = drm_dp_dpcd_read(mgr->aux, DP_DPCD_REV, mgr->dpcd, 
DP_RECEIVER_CAP_SIZE);
-   if (ret != DP_RECEIVER_CAP_SIZE) {
-   DRM_DEBUG_KMS("failed to read DPCD\n");
+   ret = drm_dp_read_dpcd_caps(mgr->aux, mgr->dpcd);
+   if (ret < 0) {
+   drm_dbg_kms(mgr->dev, "failed to read DPCD, ret %d\n", 
ret);
goto out_unlock;
}
 
-- 
2.17.1