[PATCH v2] drm/i915/mst: Hookup DRM DP MST late_register/early_unregister callbacks

[PATCH v2] drm/i915/mst: Hookup DRM DP MST late_register/early_unregister callbacks

[Lyude Paul]

i915 can enable aux device nodes for DP MST by calling
drm_dp_mst_connector_late_register()/drm_dp_mst_connector_early_unregister(),
so let's hook that up.

Changes since v1:
* Call intel_connector_register/unregister() from
  intel_dp_mst_connector_late_register/unregister() so we don't lose
  error injection - Ville Syrjälä

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Manasi Navare <manasi.d.navare@intel.com>
Cc: "Lee, Shawn C" <shawn.c.lee@intel.com>
Signed-off-by: Lyude Paul <lyude@redhat.com>
---
 drivers/gpu/drm/i915/display/intel_dp_mst.c | 28 +++++++++++++++++++--
 1 file changed, 26 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.c b/drivers/gpu/drm/i915/display/intel_dp_mst.c
index d53978ed3c12..9311c10f5b1b 100644
--- a/drivers/gpu/drm/i915/display/intel_dp_mst.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c
@@ -548,12 +548,36 @@ static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector)
 	return ret;
 }
 
+static int
+intel_dp_mst_connector_late_register(struct drm_connector *connector)
+{
+	struct intel_connector *intel_connector = to_intel_connector(connector);
+	int ret;
+
+	ret = drm_dp_mst_connector_late_register(connector,
+						 intel_connector->port);
+	if (ret < 0)
+		return ret;
+
+	return intel_connector_register(connector);
+}
+
+static void
+intel_dp_mst_connector_early_unregister(struct drm_connector *connector)
+{
+	struct intel_connector *intel_connector = to_intel_connector(connector);
+
+	intel_connector_unregister(connector);
+	drm_dp_mst_connector_early_unregister(connector,
+					      intel_connector->port);
+}
+
 static const struct drm_connector_funcs intel_dp_mst_connector_funcs = {
 	.fill_modes = drm_helper_probe_single_connector_modes,
 	.atomic_get_property = intel_digital_connector_atomic_get_property,
 	.atomic_set_property = intel_digital_connector_atomic_set_property,
-	.late_register = intel_connector_register,
-	.early_unregister = intel_connector_unregister,
+	.late_register = intel_dp_mst_connector_late_register,
+	.early_unregister = intel_dp_mst_connector_early_unregister,
 	.destroy = intel_connector_destroy,
 	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 	.atomic_duplicate_state = intel_digital_connector_duplicate_state,
-- 
2.24.1

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Re: [PATCH v2] drm/i915/mst: Hookup DRM DP MST late_register/early_unregister callbacks

[Ville Syrjälä]

On Tue, Mar 10, 2020 at 02:54:16PM -0400, Lyude Paul wrote:
> i915 can enable aux device nodes for DP MST by calling
> drm_dp_mst_connector_late_register()/drm_dp_mst_connector_early_unregister(),
> so let's hook that up.
> 
> Changes since v1:
> * Call intel_connector_register/unregister() from
>   intel_dp_mst_connector_late_register/unregister() so we don't lose
>   error injection - Ville Syrjälä
> 
> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
> Cc: Manasi Navare <manasi.d.navare@intel.com>
> Cc: "Lee, Shawn C" <shawn.c.lee@intel.com>
> Signed-off-by: Lyude Paul <lyude@redhat.com>
> ---
>  drivers/gpu/drm/i915/display/intel_dp_mst.c | 28 +++++++++++++++++++--
>  1 file changed, 26 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.c b/drivers/gpu/drm/i915/display/intel_dp_mst.c
> index d53978ed3c12..9311c10f5b1b 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp_mst.c
> +++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c
> @@ -548,12 +548,36 @@ static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector)
>  	return ret;
>  }
>  
> +static int
> +intel_dp_mst_connector_late_register(struct drm_connector *connector)
> +{
> +	struct intel_connector *intel_connector = to_intel_connector(connector);
> +	int ret;
> +
> +	ret = drm_dp_mst_connector_late_register(connector,
> +						 intel_connector->port);
> +	if (ret < 0)
> +		return ret;
> +
> +	return intel_connector_register(connector);

Don't we have to undo the damage if this fails?

> +}
> +
> +static void
> +intel_dp_mst_connector_early_unregister(struct drm_connector *connector)
> +{
> +	struct intel_connector *intel_connector = to_intel_connector(connector);
> +
> +	intel_connector_unregister(connector);
> +	drm_dp_mst_connector_early_unregister(connector,
> +					      intel_connector->port);
> +}
> +
>  static const struct drm_connector_funcs intel_dp_mst_connector_funcs = {
>  	.fill_modes = drm_helper_probe_single_connector_modes,
>  	.atomic_get_property = intel_digital_connector_atomic_get_property,
>  	.atomic_set_property = intel_digital_connector_atomic_set_property,
> -	.late_register = intel_connector_register,
> -	.early_unregister = intel_connector_unregister,
> +	.late_register = intel_dp_mst_connector_late_register,
> +	.early_unregister = intel_dp_mst_connector_early_unregister,
>  	.destroy = intel_connector_destroy,
>  	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
>  	.atomic_duplicate_state = intel_digital_connector_duplicate_state,
> -- 
> 2.24.1

-- 
Ville Syrjälä
Intel
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Re: [PATCH v2] drm/i915/mst: Hookup DRM DP MST late_register/early_unregister callbacks

[Lyude Paul]

On Tue, 2020-03-10 at 21:06 +0200, Ville Syrjälä wrote:
> On Tue, Mar 10, 2020 at 02:54:16PM -0400, Lyude Paul wrote:
> > i915 can enable aux device nodes for DP MST by calling
> > drm_dp_mst_connector_late_register()/drm_dp_mst_connector_early_unregister
> > (),
> > so let's hook that up.
> > 
> > Changes since v1:
> > * Call intel_connector_register/unregister() from
> >   intel_dp_mst_connector_late_register/unregister() so we don't lose
> >   error injection - Ville Syrjälä
> > 
> > Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
> > Cc: Manasi Navare <manasi.d.navare@intel.com>
> > Cc: "Lee, Shawn C" <shawn.c.lee@intel.com>
> > Signed-off-by: Lyude Paul <lyude@redhat.com>
> > ---
> >  drivers/gpu/drm/i915/display/intel_dp_mst.c | 28 +++++++++++++++++++--
> >  1 file changed, 26 insertions(+), 2 deletions(-)
> > 
> > diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.c
> > b/drivers/gpu/drm/i915/display/intel_dp_mst.c
> > index d53978ed3c12..9311c10f5b1b 100644
> > --- a/drivers/gpu/drm/i915/display/intel_dp_mst.c
> > +++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c
> > @@ -548,12 +548,36 @@ static int intel_dp_mst_get_ddc_modes(struct
> > drm_connector *connector)
> >  	return ret;
> >  }
> >  
> > +static int
> > +intel_dp_mst_connector_late_register(struct drm_connector *connector)
> > +{
> > +	struct intel_connector *intel_connector =
> > to_intel_connector(connector);
> > +	int ret;
> > +
> > +	ret = drm_dp_mst_connector_late_register(connector,
> > +						 intel_connector->port);
> > +	if (ret < 0)
> > +		return ret;
> > +
> > +	return intel_connector_register(connector);
> 
> Don't we have to undo the damage if this fails?

Yep, whoops. Will send out another respin with this fixed

> 
> > +}
> > +
> > +static void
> > +intel_dp_mst_connector_early_unregister(struct drm_connector *connector)
> > +{
> > +	struct intel_connector *intel_connector =
> > to_intel_connector(connector);
> > +
> > +	intel_connector_unregister(connector);
> > +	drm_dp_mst_connector_early_unregister(connector,
> > +					      intel_connector->port);
> > +}
> > +
> >  static const struct drm_connector_funcs intel_dp_mst_connector_funcs = {
> >  	.fill_modes = drm_helper_probe_single_connector_modes,
> >  	.atomic_get_property = intel_digital_connector_atomic_get_property,
> >  	.atomic_set_property = intel_digital_connector_atomic_set_property,
> > -	.late_register = intel_connector_register,
> > -	.early_unregister = intel_connector_unregister,
> > +	.late_register = intel_dp_mst_connector_late_register,
> > +	.early_unregister = intel_dp_mst_connector_early_unregister,
> >  	.destroy = intel_connector_destroy,
> >  	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
> >  	.atomic_duplicate_state = intel_digital_connector_duplicate_state,
> > -- 
> > 2.24.1
-- 
Cheers,
	Lyude Paul (she/her)
	Associate Software Engineer at Red Hat

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[PATCH v3] drm/i915/mst: Hookup DRM DP MST late_register/early_unregister callbacks

[Lyude Paul]

i915 can enable aux device nodes for DP MST by calling
drm_dp_mst_connector_late_register()/drm_dp_mst_connector_early_unregister(),
so let's hook that up.

Changes since v1:
* Call intel_connector_register/unregister() from
  intel_dp_mst_connector_late_register/unregister() so we don't lose
  error injection - Ville Syrjälä
Changes since v2:
* Don't forget to clean up if intel_connector_register() fails - Ville

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Manasi Navare <manasi.d.navare@intel.com>
Cc: "Lee, Shawn C" <shawn.c.lee@intel.com>
Signed-off-by: Lyude Paul <lyude@redhat.com>
---
 drivers/gpu/drm/i915/display/intel_dp_mst.c | 33 +++++++++++++++++++--
 1 file changed, 31 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.c b/drivers/gpu/drm/i915/display/intel_dp_mst.c
index d53978ed3c12..e08caca658c6 100644
--- a/drivers/gpu/drm/i915/display/intel_dp_mst.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c
@@ -548,12 +548,41 @@ static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector)
 	return ret;
 }
 
+static int
+intel_dp_mst_connector_late_register(struct drm_connector *connector)
+{
+	struct intel_connector *intel_connector = to_intel_connector(connector);
+	int ret;
+
+	ret = drm_dp_mst_connector_late_register(connector,
+						 intel_connector->port);
+	if (ret < 0)
+		return ret;
+
+	ret = intel_connector_register(connector);
+	if (ret < 0)
+		drm_dp_mst_connector_early_unregister(connector,
+						      intel_connector->port);
+
+	return ret;
+}
+
+static void
+intel_dp_mst_connector_early_unregister(struct drm_connector *connector)
+{
+	struct intel_connector *intel_connector = to_intel_connector(connector);
+
+	intel_connector_unregister(connector);
+	drm_dp_mst_connector_early_unregister(connector,
+					      intel_connector->port);
+}
+
 static const struct drm_connector_funcs intel_dp_mst_connector_funcs = {
 	.fill_modes = drm_helper_probe_single_connector_modes,
 	.atomic_get_property = intel_digital_connector_atomic_get_property,
 	.atomic_set_property = intel_digital_connector_atomic_set_property,
-	.late_register = intel_connector_register,
-	.early_unregister = intel_connector_unregister,
+	.late_register = intel_dp_mst_connector_late_register,
+	.early_unregister = intel_dp_mst_connector_early_unregister,
 	.destroy = intel_connector_destroy,
 	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 	.atomic_duplicate_state = intel_digital_connector_duplicate_state,
-- 
2.24.1

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Re: [PATCH v3] drm/i915/mst: Hookup DRM DP MST late_register/early_unregister callbacks

[Ville Syrjälä]

On Tue, Mar 10, 2020 at 03:51:21PM -0400, Lyude Paul wrote:
> i915 can enable aux device nodes for DP MST by calling
> drm_dp_mst_connector_late_register()/drm_dp_mst_connector_early_unregister(),
> so let's hook that up.
> 
> Changes since v1:
> * Call intel_connector_register/unregister() from
>   intel_dp_mst_connector_late_register/unregister() so we don't lose
>   error injection - Ville Syrjälä
> Changes since v2:
> * Don't forget to clean up if intel_connector_register() fails - Ville
> 
> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
> Cc: Manasi Navare <manasi.d.navare@intel.com>
> Cc: "Lee, Shawn C" <shawn.c.lee@intel.com>
> Signed-off-by: Lyude Paul <lyude@redhat.com>

Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>

> ---
>  drivers/gpu/drm/i915/display/intel_dp_mst.c | 33 +++++++++++++++++++--
>  1 file changed, 31 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.c b/drivers/gpu/drm/i915/display/intel_dp_mst.c
> index d53978ed3c12..e08caca658c6 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp_mst.c
> +++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c
> @@ -548,12 +548,41 @@ static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector)
>  	return ret;
>  }
>  
> +static int
> +intel_dp_mst_connector_late_register(struct drm_connector *connector)
> +{
> +	struct intel_connector *intel_connector = to_intel_connector(connector);
> +	int ret;
> +
> +	ret = drm_dp_mst_connector_late_register(connector,
> +						 intel_connector->port);
> +	if (ret < 0)
> +		return ret;
> +
> +	ret = intel_connector_register(connector);
> +	if (ret < 0)
> +		drm_dp_mst_connector_early_unregister(connector,
> +						      intel_connector->port);
> +
> +	return ret;
> +}
> +
> +static void
> +intel_dp_mst_connector_early_unregister(struct drm_connector *connector)
> +{
> +	struct intel_connector *intel_connector = to_intel_connector(connector);
> +
> +	intel_connector_unregister(connector);
> +	drm_dp_mst_connector_early_unregister(connector,
> +					      intel_connector->port);
> +}
> +
>  static const struct drm_connector_funcs intel_dp_mst_connector_funcs = {
>  	.fill_modes = drm_helper_probe_single_connector_modes,
>  	.atomic_get_property = intel_digital_connector_atomic_get_property,
>  	.atomic_set_property = intel_digital_connector_atomic_set_property,
> -	.late_register = intel_connector_register,
> -	.early_unregister = intel_connector_unregister,
> +	.late_register = intel_dp_mst_connector_late_register,
> +	.early_unregister = intel_dp_mst_connector_early_unregister,
>  	.destroy = intel_connector_destroy,
>  	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
>  	.atomic_duplicate_state = intel_digital_connector_duplicate_state,
> -- 
> 2.24.1

-- 
Ville Syrjälä
Intel
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