| Message ID | 20200312035154.1621-1-imirkin@alum.mit.edu (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | drm/msm: avoid double-attaching hdmi/edp bridges | expand |
On Wed, Mar 11, 2020 at 8:52 PM Ilia Mirkin <imirkin@alum.mit.edu> wrote: > > Each of hdmi and edp are already attached in msm_*_bridge_init. A second > attachment returns -EBUSY, failing the driver load. > > Tested with HDMI on IFC6410 (APQ8064 / MDP4), but eDP case should be > analogous. > > Fixes: 3ef2f119bd3ed (drm/msm: Use drm_attach_bridge() to attach a bridge to an encoder) > Cc: Boris Brezillon <boris.brezillon@collabora.com> > Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu> Thanks Reviewed-by: Rob Clark <robdclark@gmail.com> > --- > drivers/gpu/drm/msm/edp/edp.c | 4 ---- > drivers/gpu/drm/msm/hdmi/hdmi.c | 4 ---- > 2 files changed, 8 deletions(-) > > diff --git a/drivers/gpu/drm/msm/edp/edp.c b/drivers/gpu/drm/msm/edp/edp.c > index ad4e963ccd9b..106a67473af5 100644 > --- a/drivers/gpu/drm/msm/edp/edp.c > +++ b/drivers/gpu/drm/msm/edp/edp.c > @@ -178,10 +178,6 @@ int msm_edp_modeset_init(struct msm_edp *edp, struct drm_device *dev, > goto fail; > } > > - ret = drm_bridge_attach(encoder, edp->bridge, NULL); > - if (ret) > - goto fail; > - > priv->bridges[priv->num_bridges++] = edp->bridge; > priv->connectors[priv->num_connectors++] = edp->connector; > > diff --git a/drivers/gpu/drm/msm/hdmi/hdmi.c b/drivers/gpu/drm/msm/hdmi/hdmi.c > index 1a9b6289637d..737453b6e596 100644 > --- a/drivers/gpu/drm/msm/hdmi/hdmi.c > +++ b/drivers/gpu/drm/msm/hdmi/hdmi.c > @@ -327,10 +327,6 @@ int msm_hdmi_modeset_init(struct hdmi *hdmi, > goto fail; > } > > - ret = drm_bridge_attach(encoder, hdmi->bridge, NULL); > - if (ret) > - goto fail; > - > priv->bridges[priv->num_bridges++] = hdmi->bridge; > priv->connectors[priv->num_connectors++] = hdmi->connector; > > -- > 2.24.1 >
On Thu, 12 Mar 2020 09:19:58 -0700 Rob Clark <robdclark@gmail.com> wrote: > On Wed, Mar 11, 2020 at 8:52 PM Ilia Mirkin <imirkin@alum.mit.edu> wrote: > > > > Each of hdmi and edp are already attached in msm_*_bridge_init. A second > > attachment returns -EBUSY, failing the driver load. > > > > Tested with HDMI on IFC6410 (APQ8064 / MDP4), but eDP case should be > > analogous. > > > > Fixes: 3ef2f119bd3ed (drm/msm: Use drm_attach_bridge() to attach a bridge to an encoder) > > Cc: Boris Brezillon <boris.brezillon@collabora.com> > > Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu> > > Thanks > > Reviewed-by: Rob Clark <robdclark@gmail.com> Sorry for the regression. Looks like encoder->bridge was assigned twice before my patch, and I didn't check if there were other drm_bridge_attach() calls in the driver :-/. Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com> > > > --- > > drivers/gpu/drm/msm/edp/edp.c | 4 ---- > > drivers/gpu/drm/msm/hdmi/hdmi.c | 4 ---- > > 2 files changed, 8 deletions(-) > > > > diff --git a/drivers/gpu/drm/msm/edp/edp.c b/drivers/gpu/drm/msm/edp/edp.c > > index ad4e963ccd9b..106a67473af5 100644 > > --- a/drivers/gpu/drm/msm/edp/edp.c > > +++ b/drivers/gpu/drm/msm/edp/edp.c > > @@ -178,10 +178,6 @@ int msm_edp_modeset_init(struct msm_edp *edp, struct drm_device *dev, > > goto fail; > > } > > > > - ret = drm_bridge_attach(encoder, edp->bridge, NULL); > > - if (ret) > > - goto fail; > > - > > priv->bridges[priv->num_bridges++] = edp->bridge; > > priv->connectors[priv->num_connectors++] = edp->connector; > > > > diff --git a/drivers/gpu/drm/msm/hdmi/hdmi.c b/drivers/gpu/drm/msm/hdmi/hdmi.c > > index 1a9b6289637d..737453b6e596 100644 > > --- a/drivers/gpu/drm/msm/hdmi/hdmi.c > > +++ b/drivers/gpu/drm/msm/hdmi/hdmi.c > > @@ -327,10 +327,6 @@ int msm_hdmi_modeset_init(struct hdmi *hdmi, > > goto fail; > > } > > > > - ret = drm_bridge_attach(encoder, hdmi->bridge, NULL); > > - if (ret) > > - goto fail; > > - > > priv->bridges[priv->num_bridges++] = hdmi->bridge; > > priv->connectors[priv->num_connectors++] = hdmi->connector; > > > > -- > > 2.24.1 > >
On Wed 11 Mar 20:51 PDT 2020, Ilia Mirkin wrote: > Each of hdmi and edp are already attached in msm_*_bridge_init. A second > attachment returns -EBUSY, failing the driver load. > > Tested with HDMI on IFC6410 (APQ8064 / MDP4), but eDP case should be > analogous. > > Fixes: 3ef2f119bd3ed (drm/msm: Use drm_attach_bridge() to attach a bridge to an encoder) > Cc: Boris Brezillon <boris.brezillon@collabora.com> > Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu> Had to manually apply this, as the drm_bridge_attach() prototype changed since this patch was written - but this was trivial. This is needed on db820c as well. Tested-by: Bjorn Andersson <bjorn.andersson@linaro.org> (hdmi part) Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org> Regards, Bjorn > --- > drivers/gpu/drm/msm/edp/edp.c | 4 ---- > drivers/gpu/drm/msm/hdmi/hdmi.c | 4 ---- > 2 files changed, 8 deletions(-) > > diff --git a/drivers/gpu/drm/msm/edp/edp.c b/drivers/gpu/drm/msm/edp/edp.c > index ad4e963ccd9b..106a67473af5 100644 > --- a/drivers/gpu/drm/msm/edp/edp.c > +++ b/drivers/gpu/drm/msm/edp/edp.c > @@ -178,10 +178,6 @@ int msm_edp_modeset_init(struct msm_edp *edp, struct drm_device *dev, > goto fail; > } > > - ret = drm_bridge_attach(encoder, edp->bridge, NULL); > - if (ret) > - goto fail; > - > priv->bridges[priv->num_bridges++] = edp->bridge; > priv->connectors[priv->num_connectors++] = edp->connector; > > diff --git a/drivers/gpu/drm/msm/hdmi/hdmi.c b/drivers/gpu/drm/msm/hdmi/hdmi.c > index 1a9b6289637d..737453b6e596 100644 > --- a/drivers/gpu/drm/msm/hdmi/hdmi.c > +++ b/drivers/gpu/drm/msm/hdmi/hdmi.c > @@ -327,10 +327,6 @@ int msm_hdmi_modeset_init(struct hdmi *hdmi, > goto fail; > } > > - ret = drm_bridge_attach(encoder, hdmi->bridge, NULL); > - if (ret) > - goto fail; > - > priv->bridges[priv->num_bridges++] = hdmi->bridge; > priv->connectors[priv->num_connectors++] = hdmi->connector; > > -- > 2.24.1 >
diff --git a/drivers/gpu/drm/msm/edp/edp.c b/drivers/gpu/drm/msm/edp/edp.c index ad4e963ccd9b..106a67473af5 100644 --- a/drivers/gpu/drm/msm/edp/edp.c +++ b/drivers/gpu/drm/msm/edp/edp.c @@ -178,10 +178,6 @@ int msm_edp_modeset_init(struct msm_edp *edp, struct drm_device *dev, goto fail; } - ret = drm_bridge_attach(encoder, edp->bridge, NULL); - if (ret) - goto fail; - priv->bridges[priv->num_bridges++] = edp->bridge; priv->connectors[priv->num_connectors++] = edp->connector; diff --git a/drivers/gpu/drm/msm/hdmi/hdmi.c b/drivers/gpu/drm/msm/hdmi/hdmi.c index 1a9b6289637d..737453b6e596 100644 --- a/drivers/gpu/drm/msm/hdmi/hdmi.c +++ b/drivers/gpu/drm/msm/hdmi/hdmi.c @@ -327,10 +327,6 @@ int msm_hdmi_modeset_init(struct hdmi *hdmi, goto fail; } - ret = drm_bridge_attach(encoder, hdmi->bridge, NULL); - if (ret) - goto fail; - priv->bridges[priv->num_bridges++] = hdmi->bridge; priv->connectors[priv->num_connectors++] = hdmi->connector;
Each of hdmi and edp are already attached in msm_*_bridge_init. A second attachment returns -EBUSY, failing the driver load. Tested with HDMI on IFC6410 (APQ8064 / MDP4), but eDP case should be analogous. Fixes: 3ef2f119bd3ed (drm/msm: Use drm_attach_bridge() to attach a bridge to an encoder) Cc: Boris Brezillon <boris.brezillon@collabora.com> Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu> --- drivers/gpu/drm/msm/edp/edp.c | 4 ---- drivers/gpu/drm/msm/hdmi/hdmi.c | 4 ---- 2 files changed, 8 deletions(-)