[PATCH v6 0/8] drm: cec: convert DRM drivers to the new notifier API

[PATCH v6 0/8] drm: cec: convert DRM drivers to the new notifier API

[Dariusz Marcinkiewicz]

This series updates DRM drivers to use new CEC notifier API.

Only first two patches were tested on the actual hardware.

Changes since v5:
	Fixed a warning about a missing comment for a new member of
	drm_dp_aux_cec struct. Sending to a wider audience, including
	maintainers of respective drivers.
Changes since v4:
	Addressing review comments.
Changes since v3:
        Updated adapter flags in dw-hdmi-cec.
Changes since v2:
	Include all DRM patches from "cec: improve notifier support,
	add connector info connector info" series.
Changes since v1:
	Those patches delay creation of notifiers until respective
	connectors are constructed. It seems that those patches, for a
	couple of drivers, by adding the delay, introduce a race between
	notifiers' creation and the IRQs handling threads - at least I
	don't see anything obvious in there that would explicitly forbid
	such races to occur. v2 adds a write barrier to make sure IRQ
	threads see the notifier once it is created (replacing the
	WRITE_ONCE I put in v1). The best thing to do here, I believe,
	would be not to have any synchronization and make sure that an IRQ
	only gets enabled after the notifier is created.

Dariusz Marcinkiewicz (8):
  drm/i915/intel_hdmi: use cec_notifier_conn_(un)register
  dw-hdmi-cec: use cec_notifier_cec_adap_(un)register
  tda9950: use cec_notifier_cec_adap_(un)register
  drm: tda998x: use cec_notifier_conn_(un)register
  drm: sti: use cec_notifier_conn_(un)register
  drm: tegra: use cec_notifier_conn_(un)register
  drm: dw-hdmi: use cec_notifier_conn_(un)register
  drm: exynos: exynos_hdmi: use cec_notifier_conn_(un)register

 drivers/gpu/drm/bridge/synopsys/dw-hdmi-cec.c | 13 ++++---
 drivers/gpu/drm/bridge/synopsys/dw-hdmi.c     | 36 +++++++++++--------
 drivers/gpu/drm/exynos/exynos_hdmi.c          | 31 +++++++++-------
 drivers/gpu/drm/i2c/tda9950.c                 | 12 +++----
 drivers/gpu/drm/i2c/tda998x_drv.c             | 33 +++++++++++------
 drivers/gpu/drm/i915/display/intel_hdmi.c     | 13 ++++---
 drivers/gpu/drm/sti/sti_hdmi.c                | 19 ++++++----
 drivers/gpu/drm/tegra/output.c                | 28 +++++++++++----
 8 files changed, 117 insertions(+), 68 deletions(-)

-- 
2.23.0.rc1.153.gdeed80330f-goog

[PATCH v6 1/8] drm/i915/intel_hdmi: use cec_notifier_conn_(un)register

[Dariusz Marcinkiewicz]

Use the new cec_notifier_conn_(un)register() functions to
(un)register the notifier for the HDMI connector, and fill in
the cec_connector_info.

Signed-off-by: Dariusz Marcinkiewicz <darekm@google.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Tested-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
---
 drivers/gpu/drm/i915/display/intel_hdmi.c | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_hdmi.c b/drivers/gpu/drm/i915/display/intel_hdmi.c
index b1ca8e5bdb56d..9fcf2c58c29c5 100644
--- a/drivers/gpu/drm/i915/display/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/display/intel_hdmi.c
@@ -2752,8 +2752,9 @@ intel_hdmi_connector_register(struct drm_connector *connector)
 
 static void intel_hdmi_destroy(struct drm_connector *connector)
 {
-	if (intel_attached_hdmi(connector)->cec_notifier)
-		cec_notifier_put(intel_attached_hdmi(connector)->cec_notifier);
+	struct cec_notifier *n = intel_attached_hdmi(connector)->cec_notifier;
+
+	cec_notifier_conn_unregister(n);
 
 	intel_connector_destroy(connector);
 }
@@ -3068,6 +3069,7 @@ void intel_hdmi_init_connector(struct intel_digital_port *intel_dig_port,
 	struct drm_device *dev = intel_encoder->base.dev;
 	struct drm_i915_private *dev_priv = to_i915(dev);
 	enum port port = intel_encoder->port;
+	struct cec_connector_info conn_info;
 
 	DRM_DEBUG_KMS("Adding HDMI connector on port %c\n",
 		      port_name(port));
@@ -3120,8 +3122,11 @@ void intel_hdmi_init_connector(struct intel_digital_port *intel_dig_port,
 		I915_WRITE(PEG_BAND_GAP_DATA, (temp & ~0xf) | 0xd);
 	}
 
-	intel_hdmi->cec_notifier = cec_notifier_get_conn(dev->dev,
-							 port_identifier(port));
+	cec_fill_conn_info_from_drm(&conn_info, connector);
+
+	intel_hdmi->cec_notifier =
+		cec_notifier_conn_register(dev->dev, port_identifier(port),
+					   &conn_info);
 	if (!intel_hdmi->cec_notifier)
 		DRM_DEBUG_KMS("CEC notifier get failed\n");
 }
-- 
2.23.0.rc1.153.gdeed80330f-goog

[PATCH v6 2/8] dw-hdmi-cec: use cec_notifier_cec_adap_(un)register

[Dariusz Marcinkiewicz]

Use the new cec_notifier_cec_adap_(un)register() functions to
(un)register the notifier for the CEC adapter.

Also adds CEC_CAP_CONNECTOR_INFO capability to the adapter.

Changes since v3:
	- add CEC_CAP_CONNECTOR_INFO to cec_allocate_adapter,
	- replace CEC_CAP_LOG_ADDRS | CEC_CAP_TRANSMIT |
	CEC_CAP_RC | CEC_CAP_PASSTHROUGH with CEC_CAP_DEFAULTS.

Signed-off-by: Dariusz Marcinkiewicz <darekm@google.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Tested-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
---
 drivers/gpu/drm/bridge/synopsys/dw-hdmi-cec.c | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-cec.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-cec.c
index 0f949978d3fcd..ac1e001d08829 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-cec.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-cec.c
@@ -256,8 +256,8 @@ static int dw_hdmi_cec_probe(struct platform_device *pdev)
 	dw_hdmi_write(cec, 0, HDMI_CEC_POLARITY);
 
 	cec->adap = cec_allocate_adapter(&dw_hdmi_cec_ops, cec, "dw_hdmi",
-					 CEC_CAP_LOG_ADDRS | CEC_CAP_TRANSMIT |
-					 CEC_CAP_RC | CEC_CAP_PASSTHROUGH,
+					 CEC_CAP_DEFAULTS |
+					 CEC_CAP_CONNECTOR_INFO,
 					 CEC_MAX_LOG_ADDRS);
 	if (IS_ERR(cec->adap))
 		return PTR_ERR(cec->adap);
@@ -278,13 +278,14 @@ static int dw_hdmi_cec_probe(struct platform_device *pdev)
 	if (ret < 0)
 		return ret;
 
-	cec->notify = cec_notifier_get(pdev->dev.parent);
+	cec->notify = cec_notifier_cec_adap_register(pdev->dev.parent,
+						     NULL, cec->adap);
 	if (!cec->notify)
 		return -ENOMEM;
 
 	ret = cec_register_adapter(cec->adap, pdev->dev.parent);
 	if (ret < 0) {
-		cec_notifier_put(cec->notify);
+		cec_notifier_cec_adap_unregister(cec->notify);
 		return ret;
 	}
 
@@ -294,8 +295,6 @@ static int dw_hdmi_cec_probe(struct platform_device *pdev)
 	 */
 	devm_remove_action(&pdev->dev, dw_hdmi_cec_del, cec);
 
-	cec_register_cec_notifier(cec->adap, cec->notify);
-
 	return 0;
 }
 
@@ -303,8 +302,8 @@ static int dw_hdmi_cec_remove(struct platform_device *pdev)
 {
 	struct dw_hdmi_cec *cec = platform_get_drvdata(pdev);
 
+	cec_notifier_cec_adap_unregister(cec->notify);
 	cec_unregister_adapter(cec->adap);
-	cec_notifier_put(cec->notify);
 
 	return 0;
 }
-- 
2.23.0.rc1.153.gdeed80330f-goog

[PATCH v6 3/8] tda9950: use cec_notifier_cec_adap_(un)register

[Dariusz Marcinkiewicz]

Use the new cec_notifier_cec_adap_(un)register() functions to
(un)register the notifier for the CEC adapter.

Signed-off-by: Dariusz Marcinkiewicz <darekm@google.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Tested-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
---
 drivers/gpu/drm/i2c/tda9950.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/i2c/tda9950.c b/drivers/gpu/drm/i2c/tda9950.c
index 8039fc0d83db4..a5a75bdeb7a5f 100644
--- a/drivers/gpu/drm/i2c/tda9950.c
+++ b/drivers/gpu/drm/i2c/tda9950.c
@@ -420,7 +420,8 @@ static int tda9950_probe(struct i2c_client *client,
 		priv->hdmi = glue->parent;
 
 	priv->adap = cec_allocate_adapter(&tda9950_cec_ops, priv, "tda9950",
-					  CEC_CAP_DEFAULTS,
+					  CEC_CAP_DEFAULTS |
+					  CEC_CAP_CONNECTOR_INFO,
 					  CEC_MAX_LOG_ADDRS);
 	if (IS_ERR(priv->adap))
 		return PTR_ERR(priv->adap);
@@ -457,13 +458,14 @@ static int tda9950_probe(struct i2c_client *client,
 	if (ret < 0)
 		return ret;
 
-	priv->notify = cec_notifier_get(priv->hdmi);
+	priv->notify = cec_notifier_cec_adap_register(priv->hdmi, NULL,
+						      priv->adap);
 	if (!priv->notify)
 		return -ENOMEM;
 
 	ret = cec_register_adapter(priv->adap, priv->hdmi);
 	if (ret < 0) {
-		cec_notifier_put(priv->notify);
+		cec_notifier_cec_adap_unregister(priv->notify);
 		return ret;
 	}
 
@@ -473,8 +475,6 @@ static int tda9950_probe(struct i2c_client *client,
 	 */
 	devm_remove_action(dev, tda9950_cec_del, priv);
 
-	cec_register_cec_notifier(priv->adap, priv->notify);
-
 	return 0;
 }
 
@@ -482,8 +482,8 @@ static int tda9950_remove(struct i2c_client *client)
 {
 	struct tda9950_priv *priv = i2c_get_clientdata(client);
 
+	cec_notifier_cec_adap_unregister(priv->notify);
 	cec_unregister_adapter(priv->adap);
-	cec_notifier_put(priv->notify);
 
 	return 0;
 }
-- 
2.23.0.rc1.153.gdeed80330f-goog

Re: [PATCH v6 3/8] tda9950: use cec_notifier_cec_adap_(un)register

[Russell King - ARM Linux admin]

On Tue, Aug 13, 2019 at 01:02:35PM +0200, Dariusz Marcinkiewicz wrote:
> Use the new cec_notifier_cec_adap_(un)register() functions to
> (un)register the notifier for the CEC adapter.
> 
> Signed-off-by: Dariusz Marcinkiewicz <darekm@google.com>
> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
> Tested-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
> ---
>  drivers/gpu/drm/i2c/tda9950.c | 12 ++++++------
>  1 file changed, 6 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i2c/tda9950.c b/drivers/gpu/drm/i2c/tda9950.c
> index 8039fc0d83db4..a5a75bdeb7a5f 100644
> --- a/drivers/gpu/drm/i2c/tda9950.c
> +++ b/drivers/gpu/drm/i2c/tda9950.c
> @@ -420,7 +420,8 @@ static int tda9950_probe(struct i2c_client *client,
>  		priv->hdmi = glue->parent;
>  
>  	priv->adap = cec_allocate_adapter(&tda9950_cec_ops, priv, "tda9950",
> -					  CEC_CAP_DEFAULTS,
> +					  CEC_CAP_DEFAULTS |
> +					  CEC_CAP_CONNECTOR_INFO,
>  					  CEC_MAX_LOG_ADDRS);
>  	if (IS_ERR(priv->adap))
>  		return PTR_ERR(priv->adap);
> @@ -457,13 +458,14 @@ static int tda9950_probe(struct i2c_client *client,
>  	if (ret < 0)
>  		return ret;
>  
> -	priv->notify = cec_notifier_get(priv->hdmi);
> +	priv->notify = cec_notifier_cec_adap_register(priv->hdmi, NULL,
> +						      priv->adap);
>  	if (!priv->notify)
>  		return -ENOMEM;
>  
>  	ret = cec_register_adapter(priv->adap, priv->hdmi);
>  	if (ret < 0) {
> -		cec_notifier_put(priv->notify);
> +		cec_notifier_cec_adap_unregister(priv->notify);
>  		return ret;
>  	}
>  
> @@ -473,8 +475,6 @@ static int tda9950_probe(struct i2c_client *client,
>  	 */
>  	devm_remove_action(dev, tda9950_cec_del, priv);
>  
> -	cec_register_cec_notifier(priv->adap, priv->notify);
> -
>  	return 0;
>  }
>  
> @@ -482,8 +482,8 @@ static int tda9950_remove(struct i2c_client *client)
>  {
>  	struct tda9950_priv *priv = i2c_get_clientdata(client);
>  
> +	cec_notifier_cec_adap_unregister(priv->notify);
>  	cec_unregister_adapter(priv->adap);
> -	cec_notifier_put(priv->notify);

It looks weird to have an unexpectedly different ordering of
unregistration from the registration path - normally, unregistration
is the reverse order of initialisation.

In the initialisation path, it seems that we register the notifier
and _then_ the adapter.  Here, we unregister the notifier and then
the adapter rather than what would normally be expected.  Why is
this?  I suspect there will be drivers created that do this the
"normal" way round, so if this is a requirement, it needs to be made
plainly obvious.

>  
>  	return 0;
>  }
> -- 
> 2.23.0.rc1.153.gdeed80330f-goog
> 
> 

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTC broadband for 0.8mile line in suburbia: sync at 12.1Mbps down 622kbps up
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Re: [PATCH v6 3/8] tda9950: use cec_notifier_cec_adap_(un)register

[Hans Verkuil]

On 8/13/19 1:32 PM, Russell King - ARM Linux admin wrote:
> On Tue, Aug 13, 2019 at 01:02:35PM +0200, Dariusz Marcinkiewicz wrote:
>> Use the new cec_notifier_cec_adap_(un)register() functions to
>> (un)register the notifier for the CEC adapter.
>>
>> Signed-off-by: Dariusz Marcinkiewicz <darekm@google.com>
>> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
>> Tested-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
>> ---
>>  drivers/gpu/drm/i2c/tda9950.c | 12 ++++++------
>>  1 file changed, 6 insertions(+), 6 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/i2c/tda9950.c b/drivers/gpu/drm/i2c/tda9950.c
>> index 8039fc0d83db4..a5a75bdeb7a5f 100644
>> --- a/drivers/gpu/drm/i2c/tda9950.c
>> +++ b/drivers/gpu/drm/i2c/tda9950.c
>> @@ -420,7 +420,8 @@ static int tda9950_probe(struct i2c_client *client,
>>  		priv->hdmi = glue->parent;
>>  
>>  	priv->adap = cec_allocate_adapter(&tda9950_cec_ops, priv, "tda9950",
>> -					  CEC_CAP_DEFAULTS,
>> +					  CEC_CAP_DEFAULTS |
>> +					  CEC_CAP_CONNECTOR_INFO,
>>  					  CEC_MAX_LOG_ADDRS);
>>  	if (IS_ERR(priv->adap))
>>  		return PTR_ERR(priv->adap);
>> @@ -457,13 +458,14 @@ static int tda9950_probe(struct i2c_client *client,
>>  	if (ret < 0)
>>  		return ret;
>>  
>> -	priv->notify = cec_notifier_get(priv->hdmi);
>> +	priv->notify = cec_notifier_cec_adap_register(priv->hdmi, NULL,
>> +						      priv->adap);
>>  	if (!priv->notify)
>>  		return -ENOMEM;
>>  
>>  	ret = cec_register_adapter(priv->adap, priv->hdmi);
>>  	if (ret < 0) {
>> -		cec_notifier_put(priv->notify);
>> +		cec_notifier_cec_adap_unregister(priv->notify);
>>  		return ret;
>>  	}
>>  
>> @@ -473,8 +475,6 @@ static int tda9950_probe(struct i2c_client *client,
>>  	 */
>>  	devm_remove_action(dev, tda9950_cec_del, priv);
>>  
>> -	cec_register_cec_notifier(priv->adap, priv->notify);
>> -
>>  	return 0;
>>  }
>>  
>> @@ -482,8 +482,8 @@ static int tda9950_remove(struct i2c_client *client)
>>  {
>>  	struct tda9950_priv *priv = i2c_get_clientdata(client);
>>  
>> +	cec_notifier_cec_adap_unregister(priv->notify);
>>  	cec_unregister_adapter(priv->adap);
>> -	cec_notifier_put(priv->notify);
> 
> It looks weird to have an unexpectedly different ordering of
> unregistration from the registration path - normally, unregistration
> is the reverse order of initialisation.
> 
> In the initialisation path, it seems that we register the notifier
> and _then_ the adapter.  Here, we unregister the notifier and then
> the adapter rather than what would normally be expected.  Why is
> this?  I suspect there will be drivers created that do this the
> "normal" way round, so if this is a requirement, it needs to be made
> plainly obvious.

It's not a requirement, it just feels better to do it in this order
since cec_unregister_adapter will in general also delete the adapter
(unless an application keeps the cec device open).

So the order is actually: allocate_adapter, then register notifier
and: unregister notifier, then unregister (and typically delete) adapter

Regards,

	Hans

> 
>>  
>>  	return 0;
>>  }
>> -- 
>> 2.23.0.rc1.153.gdeed80330f-goog
>>
>>
> 

[PATCH v6 4/8] drm: tda998x: use cec_notifier_conn_(un)register

[Dariusz Marcinkiewicz]

Use the new cec_notifier_conn_(un)register() functions to
(un)register the notifier for the HDMI connector, and fill
in the cec_connector_info.

Changes since v2:
	- cec_notifier_phys_addr_invalidate where appropriate,
	- don't check for NULL notifier before calling
	cec_notifier_conn_unregister.
Changes since v1:
	Add memory barrier to make sure that the notifier
	becomes visible to the irq thread once it is
	fully constructed.

Signed-off-by: Dariusz Marcinkiewicz <darekm@google.com>
Tested-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
---
 drivers/gpu/drm/i2c/tda998x_drv.c | 33 +++++++++++++++++++++----------
 1 file changed, 23 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/i2c/tda998x_drv.c b/drivers/gpu/drm/i2c/tda998x_drv.c
index 61e042918a7fc..19a63ee1b3f53 100644
--- a/drivers/gpu/drm/i2c/tda998x_drv.c
+++ b/drivers/gpu/drm/i2c/tda998x_drv.c
@@ -804,9 +804,14 @@ static irqreturn_t tda998x_irq_thread(int irq, void *data)
 			if (lvl & CEC_RXSHPDLEV_HPD) {
 				tda998x_edid_delay_start(priv);
 			} else {
+				struct cec_notifier *notify;
+
 				schedule_work(&priv->detect_work);
-				cec_notifier_set_phys_addr(priv->cec_notify,
-						   CEC_PHYS_ADDR_INVALID);
+
+				notify = READ_ONCE(priv->cec_notify);
+				if (notify)
+					cec_notifier_phys_addr_invalidate(
+							notify);
 			}
 
 			handled = true;
@@ -1331,6 +1336,8 @@ static int tda998x_connector_init(struct tda998x_priv *priv,
 				  struct drm_device *drm)
 {
 	struct drm_connector *connector = &priv->connector;
+	struct cec_connector_info conn_info;
+	struct cec_notifier *notifier;
 	int ret;
 
 	connector->interlace_allowed = 1;
@@ -1347,6 +1354,19 @@ static int tda998x_connector_init(struct tda998x_priv *priv,
 	if (ret)
 		return ret;
 
+	cec_fill_conn_info_from_drm(&conn_info, connector);
+
+	notifier = cec_notifier_conn_register(priv->cec_glue.parent,
+					      NULL, &conn_info);
+	if (!notifier)
+		return -ENOMEM;
+	/*
+	 * Make sure that tda998x_irq_thread does see the notifier
+	 * when it fully constructed.
+	 */
+	smp_wmb();
+	priv->cec_notify = notifier;
+
 	drm_connector_attach_encoder(&priv->connector,
 				     priv->bridge.encoder);
 
@@ -1790,8 +1810,7 @@ static void tda998x_destroy(struct device *dev)
 
 	i2c_unregister_device(priv->cec);
 
-	if (priv->cec_notify)
-		cec_notifier_put(priv->cec_notify);
+	cec_notifier_conn_unregister(priv->cec_notify);
 }
 
 static int tda998x_create(struct device *dev)
@@ -1916,12 +1935,6 @@ static int tda998x_create(struct device *dev)
 		cec_write(priv, REG_CEC_RXSHPDINTENA, CEC_RXSHPDLEV_HPD);
 	}
 
-	priv->cec_notify = cec_notifier_get(dev);
-	if (!priv->cec_notify) {
-		ret = -ENOMEM;
-		goto fail;
-	}
-
 	priv->cec_glue.parent = dev;
 	priv->cec_glue.data = priv;
 	priv->cec_glue.init = tda998x_cec_hook_init;
-- 
2.23.0.rc1.153.gdeed80330f-goog

Re: [PATCH v6 4/8] drm: tda998x: use cec_notifier_conn_(un)register

[Russell King - ARM Linux admin]

On Tue, Aug 13, 2019 at 01:02:36PM +0200, Dariusz Marcinkiewicz wrote:
> Use the new cec_notifier_conn_(un)register() functions to
> (un)register the notifier for the HDMI connector, and fill
> in the cec_connector_info.
> 
> Changes since v2:
> 	- cec_notifier_phys_addr_invalidate where appropriate,
> 	- don't check for NULL notifier before calling
> 	cec_notifier_conn_unregister.
> Changes since v1:
> 	Add memory barrier to make sure that the notifier
> 	becomes visible to the irq thread once it is
> 	fully constructed.
> 
> Signed-off-by: Dariusz Marcinkiewicz <darekm@google.com>
> Tested-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
> ---
>  drivers/gpu/drm/i2c/tda998x_drv.c | 33 +++++++++++++++++++++----------
>  1 file changed, 23 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i2c/tda998x_drv.c b/drivers/gpu/drm/i2c/tda998x_drv.c
> index 61e042918a7fc..19a63ee1b3f53 100644
> --- a/drivers/gpu/drm/i2c/tda998x_drv.c
> +++ b/drivers/gpu/drm/i2c/tda998x_drv.c
> @@ -804,9 +804,14 @@ static irqreturn_t tda998x_irq_thread(int irq, void *data)
>  			if (lvl & CEC_RXSHPDLEV_HPD) {
>  				tda998x_edid_delay_start(priv);
>  			} else {
> +				struct cec_notifier *notify;
> +
>  				schedule_work(&priv->detect_work);
> -				cec_notifier_set_phys_addr(priv->cec_notify,
> -						   CEC_PHYS_ADDR_INVALID);
> +
> +				notify = READ_ONCE(priv->cec_notify);
> +				if (notify)
> +					cec_notifier_phys_addr_invalidate(
> +							notify);
>  			}
>  
>  			handled = true;
> @@ -1331,6 +1336,8 @@ static int tda998x_connector_init(struct tda998x_priv *priv,
>  				  struct drm_device *drm)
>  {
>  	struct drm_connector *connector = &priv->connector;
> +	struct cec_connector_info conn_info;
> +	struct cec_notifier *notifier;
>  	int ret;
>  
>  	connector->interlace_allowed = 1;
> @@ -1347,6 +1354,19 @@ static int tda998x_connector_init(struct tda998x_priv *priv,
>  	if (ret)
>  		return ret;
>  
> +	cec_fill_conn_info_from_drm(&conn_info, connector);
> +
> +	notifier = cec_notifier_conn_register(priv->cec_glue.parent,
> +					      NULL, &conn_info);
> +	if (!notifier)
> +		return -ENOMEM;
> +	/*
> +	 * Make sure that tda998x_irq_thread does see the notifier
> +	 * when it fully constructed.
> +	 */
> +	smp_wmb();
> +	priv->cec_notify = notifier;

To nitpick, this comment and the following code do not go together.

I think what you actually mean is:

	 * Make sure that tda998x_irq_thread sees the notifier
	 * only after it is fully constructed.

> +
>  	drm_connector_attach_encoder(&priv->connector,
>  				     priv->bridge.encoder);
>  
> @@ -1790,8 +1810,7 @@ static void tda998x_destroy(struct device *dev)
>  
>  	i2c_unregister_device(priv->cec);
>  
> -	if (priv->cec_notify)
> -		cec_notifier_put(priv->cec_notify);
> +	cec_notifier_conn_unregister(priv->cec_notify);

This also doesn't make sense: tda998x_destroy() is the opposite of
tda998x_create().  However, tda998x_connector_destroy() is the
opposite of tda998x_connector_create().

By moving the CEC creation code into tda998x_connector_create(), you
are creating the possibility for the following sequence to mess up
CEC and leak:

	tda998x_create()
	tda998x_connector_create()
	tda998x_connector_destroy()
	tda998x_connector_create()
	tda998x_connector_destroy()
	tda998x_destroy()

Anything you create in tda998x_connector_create() must be cleaned up
by tda998x_connector_destroy().

>  }
>  
>  static int tda998x_create(struct device *dev)
> @@ -1916,12 +1935,6 @@ static int tda998x_create(struct device *dev)
>  		cec_write(priv, REG_CEC_RXSHPDINTENA, CEC_RXSHPDLEV_HPD);
>  	}
>  
> -	priv->cec_notify = cec_notifier_get(dev);
> -	if (!priv->cec_notify) {
> -		ret = -ENOMEM;
> -		goto fail;
> -	}
> -
>  	priv->cec_glue.parent = dev;
>  	priv->cec_glue.data = priv;
>  	priv->cec_glue.init = tda998x_cec_hook_init;
> -- 
> 2.23.0.rc1.153.gdeed80330f-goog
> 
> 

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTC broadband for 0.8mile line in suburbia: sync at 12.1Mbps down 622kbps up
According to speedtest.net: 11.9Mbps down 500kbps up

Re: [PATCH v6 4/8] drm: tda998x: use cec_notifier_conn_(un)register

[Dariusz Marcinkiewicz]

Hello.

On Tue, Aug 13, 2019 at 1:20 PM Russell King - ARM Linux admin
<linux@armlinux.org.uk> wrote:
>
> This also doesn't make sense: tda998x_destroy() is the opposite of
> tda998x_create().  However, tda998x_connector_destroy() is the
> opposite of tda998x_connector_create().
>
> By moving the CEC creation code into tda998x_connector_create(), you
> are creating the possibility for the following sequence to mess up
> CEC and leak:
>
>         tda998x_create()
>         tda998x_connector_create()
>         tda998x_connector_destroy()
>         tda998x_connector_create()
>         tda998x_connector_destroy()
>         tda998x_destroy()
>
> Anything you create in tda998x_connector_create() must be cleaned up
> by tda998x_connector_destroy().
>
Thank you.

I've just sent out another revision of the patch, where registration
and deregistration is symmetric. Please take a look.

Best regards.

[PATCH v6 5/8] drm: sti: use cec_notifier_conn_(un)register

[Dariusz Marcinkiewicz]

Use the new cec_notifier_conn_(un)register() functions to
(un)register the notifier for the HDMI connector, and fill
in the cec_connector_info.

Changes since v2:
	Don't invalidate physical address before unregistering the
	notifier.

Signed-off-by: Dariusz Marcinkiewicz <darekm@google.com>
---
 drivers/gpu/drm/sti/sti_hdmi.c | 19 ++++++++++++-------
 1 file changed, 12 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/sti/sti_hdmi.c b/drivers/gpu/drm/sti/sti_hdmi.c
index 9862c322f0c4a..bd15902b825ad 100644
--- a/drivers/gpu/drm/sti/sti_hdmi.c
+++ b/drivers/gpu/drm/sti/sti_hdmi.c
@@ -1256,6 +1256,7 @@ static int sti_hdmi_bind(struct device *dev, struct device *master, void *data)
 	struct drm_device *drm_dev = data;
 	struct drm_encoder *encoder;
 	struct sti_hdmi_connector *connector;
+	struct cec_connector_info conn_info;
 	struct drm_connector *drm_connector;
 	struct drm_bridge *bridge;
 	int err;
@@ -1318,6 +1319,14 @@ static int sti_hdmi_bind(struct device *dev, struct device *master, void *data)
 		goto err_sysfs;
 	}
 
+	cec_fill_conn_info_from_drm(&conn_info, drm_connector);
+	hdmi->notifier = cec_notifier_conn_register(&hdmi->dev, NULL,
+						    &conn_info);
+	if (!hdmi->notifier) {
+		hdmi->drm_connector = NULL;
+		return -ENOMEM;
+	}
+
 	/* Enable default interrupts */
 	hdmi_write(hdmi, HDMI_DEFAULT_INT, HDMI_INT_EN);
 
@@ -1331,6 +1340,9 @@ static int sti_hdmi_bind(struct device *dev, struct device *master, void *data)
 static void sti_hdmi_unbind(struct device *dev,
 		struct device *master, void *data)
 {
+	struct sti_hdmi *hdmi = dev_get_drvdata(dev);
+
+	cec_notifier_conn_unregister(hdmi->notifier);
 }
 
 static const struct component_ops sti_hdmi_ops = {
@@ -1436,10 +1448,6 @@ static int sti_hdmi_probe(struct platform_device *pdev)
 		goto release_adapter;
 	}
 
-	hdmi->notifier = cec_notifier_get(&pdev->dev);
-	if (!hdmi->notifier)
-		goto release_adapter;
-
 	hdmi->reset = devm_reset_control_get(dev, "hdmi");
 	/* Take hdmi out of reset */
 	if (!IS_ERR(hdmi->reset))
@@ -1459,14 +1467,11 @@ static int sti_hdmi_remove(struct platform_device *pdev)
 {
 	struct sti_hdmi *hdmi = dev_get_drvdata(&pdev->dev);
 
-	cec_notifier_set_phys_addr(hdmi->notifier, CEC_PHYS_ADDR_INVALID);
-
 	i2c_put_adapter(hdmi->ddc_adapt);
 	if (hdmi->audio_pdev)
 		platform_device_unregister(hdmi->audio_pdev);
 	component_del(&pdev->dev, &sti_hdmi_ops);
 
-	cec_notifier_put(hdmi->notifier);
 	return 0;
 }
 
-- 
2.23.0.rc1.153.gdeed80330f-goog

[PATCH v6 6/8] drm: tegra: use cec_notifier_conn_(un)register

[Dariusz Marcinkiewicz]

Use the new cec_notifier_conn_(un)register() functions to
(un)register the notifier for the HDMI connector, and fill in
the cec_connector_info.

Changes since v4:
	- only create a CEC notifier for HDMI connectors

Signed-off-by: Dariusz Marcinkiewicz <darekm@google.com>
Tested-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
---
 drivers/gpu/drm/tegra/output.c | 28 +++++++++++++++++++++-------
 1 file changed, 21 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/tegra/output.c b/drivers/gpu/drm/tegra/output.c
index bdcaa4c7168cf..34373734ff689 100644
--- a/drivers/gpu/drm/tegra/output.c
+++ b/drivers/gpu/drm/tegra/output.c
@@ -70,6 +70,11 @@ tegra_output_connector_detect(struct drm_connector *connector, bool force)
 
 void tegra_output_connector_destroy(struct drm_connector *connector)
 {
+	struct tegra_output *output = connector_to_output(connector);
+
+	if (output->cec)
+		cec_notifier_conn_unregister(output->cec);
+
 	drm_connector_unregister(connector);
 	drm_connector_cleanup(connector);
 }
@@ -163,18 +168,11 @@ int tegra_output_probe(struct tegra_output *output)
 		disable_irq(output->hpd_irq);
 	}
 
-	output->cec = cec_notifier_get(output->dev);
-	if (!output->cec)
-		return -ENOMEM;
-
 	return 0;
 }
 
 void tegra_output_remove(struct tegra_output *output)
 {
-	if (output->cec)
-		cec_notifier_put(output->cec);
-
 	if (output->hpd_gpio)
 		free_irq(output->hpd_irq, output);
 
@@ -184,6 +182,7 @@ void tegra_output_remove(struct tegra_output *output)
 
 int tegra_output_init(struct drm_device *drm, struct tegra_output *output)
 {
+	int connector_type;
 	int err;
 
 	if (output->panel) {
@@ -199,6 +198,21 @@ int tegra_output_init(struct drm_device *drm, struct tegra_output *output)
 	if (output->hpd_gpio)
 		enable_irq(output->hpd_irq);
 
+	connector_type = output->connector.connector_type;
+	/*
+	 * Create a CEC notifier for HDMI connector.
+	 */
+	if (connector_type == DRM_MODE_CONNECTOR_HDMIA ||
+	    connector_type == DRM_MODE_CONNECTOR_HDMIB) {
+		struct cec_connector_info conn_info;
+
+		cec_fill_conn_info_from_drm(&conn_info, &output->connector);
+		output->cec = cec_notifier_conn_register(output->dev, NULL,
+							 &conn_info);
+		if (!output->cec)
+			return -ENOMEM;
+	}
+
 	return 0;
 }
 
-- 
2.23.0.rc1.153.gdeed80330f-goog

[PATCH v6 7/8] drm: dw-hdmi: use cec_notifier_conn_(un)register

[Dariusz Marcinkiewicz]

Use the new cec_notifier_conn_(un)register() functions to
(un)register the notifier for the HDMI connector, and fill in
the cec_connector_info.

Changes since v4:
	- typo fix
Changes since v2:
	- removed unnecessary NULL check before a call to
	cec_notifier_conn_unregister,
	- use cec_notifier_phys_addr_invalidate to invalidate physical
	address.
Changes since v1:
	Add memory barrier to make sure that the notifier
	becomes visible to the irq thread once it is fully
	constructed.

Signed-off-by: Dariusz Marcinkiewicz <darekm@google.com>
Tested-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
---
 drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 36 ++++++++++++++---------
 1 file changed, 22 insertions(+), 14 deletions(-)

diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
index 83b94b66e464e..c00184700bb9d 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
@@ -2194,6 +2194,8 @@ static int dw_hdmi_bridge_attach(struct drm_bridge *bridge)
 	struct dw_hdmi *hdmi = bridge->driver_private;
 	struct drm_encoder *encoder = bridge->encoder;
 	struct drm_connector *connector = &hdmi->connector;
+	struct cec_connector_info conn_info;
+	struct cec_notifier *notifier;
 
 	connector->interlace_allowed = 1;
 	connector->polled = DRM_CONNECTOR_POLL_HPD;
@@ -2207,6 +2209,18 @@ static int dw_hdmi_bridge_attach(struct drm_bridge *bridge)
 
 	drm_connector_attach_encoder(connector, encoder);
 
+	cec_fill_conn_info_from_drm(&conn_info, connector);
+
+	notifier = cec_notifier_conn_register(hdmi->dev, NULL, &conn_info);
+	if (!notifier)
+		return -ENOMEM;
+	/*
+	 * Make sure that dw_hdmi_irq thread does see the notifier
+	 * when it fully constructed.
+	 */
+	smp_wmb();
+	hdmi->cec_notifier = notifier;
+
 	return 0;
 }
 
@@ -2373,9 +2387,13 @@ static irqreturn_t dw_hdmi_irq(int irq, void *dev_id)
 				       phy_stat & HDMI_PHY_HPD,
 				       phy_stat & HDMI_PHY_RX_SENSE);
 
-		if ((phy_stat & (HDMI_PHY_RX_SENSE | HDMI_PHY_HPD)) == 0)
-			cec_notifier_set_phys_addr(hdmi->cec_notifier,
-						   CEC_PHYS_ADDR_INVALID);
+		if ((phy_stat & (HDMI_PHY_RX_SENSE | HDMI_PHY_HPD)) == 0) {
+			struct cec_notifier *notifier;
+
+			notifier = READ_ONCE(hdmi->cec_notifier);
+			if (notifier)
+				cec_notifier_phys_addr_invalidate(notifier);
+		}
 	}
 
 	if (intr_stat & HDMI_IH_PHY_STAT0_HPD) {
@@ -2693,12 +2711,6 @@ __dw_hdmi_probe(struct platform_device *pdev,
 	if (ret)
 		goto err_iahb;
 
-	hdmi->cec_notifier = cec_notifier_get(dev);
-	if (!hdmi->cec_notifier) {
-		ret = -ENOMEM;
-		goto err_iahb;
-	}
-
 	/*
 	 * To prevent overflows in HDMI_IH_FC_STAT2, set the clk regenerator
 	 * N and cts values before enabling phy
@@ -2796,9 +2808,6 @@ __dw_hdmi_probe(struct platform_device *pdev,
 		hdmi->ddc = NULL;
 	}
 
-	if (hdmi->cec_notifier)
-		cec_notifier_put(hdmi->cec_notifier);
-
 	clk_disable_unprepare(hdmi->iahb_clk);
 	if (hdmi->cec_clk)
 		clk_disable_unprepare(hdmi->cec_clk);
@@ -2820,8 +2829,7 @@ static void __dw_hdmi_remove(struct dw_hdmi *hdmi)
 	/* Disable all interrupts */
 	hdmi_writeb(hdmi, ~0, HDMI_IH_MUTE_PHY_STAT0);
 
-	if (hdmi->cec_notifier)
-		cec_notifier_put(hdmi->cec_notifier);
+	cec_notifier_conn_unregister(hdmi->cec_notifier);
 
 	clk_disable_unprepare(hdmi->iahb_clk);
 	clk_disable_unprepare(hdmi->isfr_clk);
-- 
2.23.0.rc1.153.gdeed80330f-goog

Re: [PATCH v6 7/8] drm: dw-hdmi: use cec_notifier_conn_(un)register

[Hans Verkuil]

On 8/13/19 1:02 PM, Dariusz Marcinkiewicz wrote:
> Use the new cec_notifier_conn_(un)register() functions to
> (un)register the notifier for the HDMI connector, and fill in
> the cec_connector_info.
> 
> Changes since v4:
> 	- typo fix
> Changes since v2:
> 	- removed unnecessary NULL check before a call to
> 	cec_notifier_conn_unregister,
> 	- use cec_notifier_phys_addr_invalidate to invalidate physical
> 	address.
> Changes since v1:
> 	Add memory barrier to make sure that the notifier
> 	becomes visible to the irq thread once it is fully
> 	constructed.
> 
> Signed-off-by: Dariusz Marcinkiewicz <darekm@google.com>
> Tested-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
> ---
>  drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 36 ++++++++++++++---------
>  1 file changed, 22 insertions(+), 14 deletions(-)
> 
> diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> index 83b94b66e464e..c00184700bb9d 100644
> --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> @@ -2194,6 +2194,8 @@ static int dw_hdmi_bridge_attach(struct drm_bridge *bridge)
>  	struct dw_hdmi *hdmi = bridge->driver_private;
>  	struct drm_encoder *encoder = bridge->encoder;
>  	struct drm_connector *connector = &hdmi->connector;
> +	struct cec_connector_info conn_info;
> +	struct cec_notifier *notifier;
>  
>  	connector->interlace_allowed = 1;
>  	connector->polled = DRM_CONNECTOR_POLL_HPD;
> @@ -2207,6 +2209,18 @@ static int dw_hdmi_bridge_attach(struct drm_bridge *bridge)
>  
>  	drm_connector_attach_encoder(connector, encoder);
>  
> +	cec_fill_conn_info_from_drm(&conn_info, connector);
> +
> +	notifier = cec_notifier_conn_register(hdmi->dev, NULL, &conn_info);
> +	if (!notifier)
> +		return -ENOMEM;
> +	/*
> +	 * Make sure that dw_hdmi_irq thread does see the notifier
> +	 * when it fully constructed.
> +	 */
> +	smp_wmb();
> +	hdmi->cec_notifier = notifier;
> +
>  	return 0;
>  }
>  
> @@ -2373,9 +2387,13 @@ static irqreturn_t dw_hdmi_irq(int irq, void *dev_id)
>  				       phy_stat & HDMI_PHY_HPD,
>  				       phy_stat & HDMI_PHY_RX_SENSE);
>  
> -		if ((phy_stat & (HDMI_PHY_RX_SENSE | HDMI_PHY_HPD)) == 0)
> -			cec_notifier_set_phys_addr(hdmi->cec_notifier,
> -						   CEC_PHYS_ADDR_INVALID);
> +		if ((phy_stat & (HDMI_PHY_RX_SENSE | HDMI_PHY_HPD)) == 0) {
> +			struct cec_notifier *notifier;
> +
> +			notifier = READ_ONCE(hdmi->cec_notifier);
> +			if (notifier)
> +				cec_notifier_phys_addr_invalidate(notifier);
> +		}
>  	}
>  
>  	if (intr_stat & HDMI_IH_PHY_STAT0_HPD) {
> @@ -2693,12 +2711,6 @@ __dw_hdmi_probe(struct platform_device *pdev,
>  	if (ret)
>  		goto err_iahb;
>  
> -	hdmi->cec_notifier = cec_notifier_get(dev);
> -	if (!hdmi->cec_notifier) {
> -		ret = -ENOMEM;
> -		goto err_iahb;
> -	}
> -
>  	/*
>  	 * To prevent overflows in HDMI_IH_FC_STAT2, set the clk regenerator
>  	 * N and cts values before enabling phy
> @@ -2796,9 +2808,6 @@ __dw_hdmi_probe(struct platform_device *pdev,
>  		hdmi->ddc = NULL;
>  	}
>  
> -	if (hdmi->cec_notifier)
> -		cec_notifier_put(hdmi->cec_notifier);
> -
>  	clk_disable_unprepare(hdmi->iahb_clk);
>  	if (hdmi->cec_clk)
>  		clk_disable_unprepare(hdmi->cec_clk);
> @@ -2820,8 +2829,7 @@ static void __dw_hdmi_remove(struct dw_hdmi *hdmi)
>  	/* Disable all interrupts */
>  	hdmi_writeb(hdmi, ~0, HDMI_IH_MUTE_PHY_STAT0);
>  
> -	if (hdmi->cec_notifier)
> -		cec_notifier_put(hdmi->cec_notifier);
> +	cec_notifier_conn_unregister(hdmi->cec_notifier);

Russell's review caused me to take another look at this series, and it made
wonder if cec_notifier_conn_unregister() shouldn't be called from bridge_detach?

Regards,

	Hans

>  
>  	clk_disable_unprepare(hdmi->iahb_clk);
>  	clk_disable_unprepare(hdmi->isfr_clk);
> 

Re: [PATCH v6 7/8] drm: dw-hdmi: use cec_notifier_conn_(un)register

[Dariusz Marcinkiewicz]

Hi.

On Tue, Aug 13, 2019 at 1:38 PM Hans Verkuil <hverkuil-cisco@xs4all.nl> wrote:
>
> Russell's review caused me to take another look at this series, and it made
> wonder if cec_notifier_conn_unregister() shouldn't be called from bridge_detach?
>
I've sent out v7 of the series where unregistration is done from bridge detach.

Regards.

[PATCH v6 8/8] drm: exynos: exynos_hdmi: use cec_notifier_conn_(un)register

[Dariusz Marcinkiewicz]

Use the new cec_notifier_conn_(un)register() functions to
(un)register the notifier for the HDMI connector, and fill in
the cec_connector_info.

Changes since v2:
	- removed unnecessary call to invalidate phys address before
	deregistering the notifier,
	- use cec_notifier_phys_addr_invalidate instead of setting
	invalid address on a notifier.

Signed-off-by: Dariusz Marcinkiewicz <darekm@google.com>
Tested-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
---
 drivers/gpu/drm/exynos/exynos_hdmi.c | 31 ++++++++++++++++------------
 1 file changed, 18 insertions(+), 13 deletions(-)

diff --git a/drivers/gpu/drm/exynos/exynos_hdmi.c b/drivers/gpu/drm/exynos/exynos_hdmi.c
index bc1565f1822ab..d532b468d9af5 100644
--- a/drivers/gpu/drm/exynos/exynos_hdmi.c
+++ b/drivers/gpu/drm/exynos/exynos_hdmi.c
@@ -852,6 +852,10 @@ static enum drm_connector_status hdmi_detect(struct drm_connector *connector,
 
 static void hdmi_connector_destroy(struct drm_connector *connector)
 {
+	struct hdmi_context *hdata = connector_to_hdmi(connector);
+
+	cec_notifier_conn_unregister(hdata->notifier);
+
 	drm_connector_unregister(connector);
 	drm_connector_cleanup(connector);
 }
@@ -935,6 +939,7 @@ static int hdmi_create_connector(struct drm_encoder *encoder)
 {
 	struct hdmi_context *hdata = encoder_to_hdmi(encoder);
 	struct drm_connector *connector = &hdata->connector;
+	struct cec_connector_info conn_info;
 	int ret;
 
 	connector->interlace_allowed = true;
@@ -957,6 +962,15 @@ static int hdmi_create_connector(struct drm_encoder *encoder)
 			DRM_DEV_ERROR(hdata->dev, "Failed to attach bridge\n");
 	}
 
+	cec_fill_conn_info_from_drm(&conn_info, connector);
+
+	hdata->notifier = cec_notifier_conn_register(hdata->dev, NULL,
+						     &conn_info);
+	if (hdata->notifier == NULL) {
+		ret = -ENOMEM;
+		DRM_DEV_ERROR(hdata->dev, "Failed to allocate CEC notifier\n");
+	}
+
 	return ret;
 }
 
@@ -1528,8 +1542,8 @@ static void hdmi_disable(struct drm_encoder *encoder)
 		 */
 		mutex_unlock(&hdata->mutex);
 		cancel_delayed_work(&hdata->hotplug_work);
-		cec_notifier_set_phys_addr(hdata->notifier,
-					   CEC_PHYS_ADDR_INVALID);
+		if (hdata->notifier)
+			cec_notifier_phys_addr_invalidate(hdata->notifier);
 		return;
 	}
 
@@ -2006,12 +2020,6 @@ static int hdmi_probe(struct platform_device *pdev)
 		}
 	}
 
-	hdata->notifier = cec_notifier_get(&pdev->dev);
-	if (hdata->notifier == NULL) {
-		ret = -ENOMEM;
-		goto err_hdmiphy;
-	}
-
 	pm_runtime_enable(dev);
 
 	audio_infoframe = &hdata->audio.infoframe;
@@ -2023,7 +2031,7 @@ static int hdmi_probe(struct platform_device *pdev)
 
 	ret = hdmi_register_audio_device(hdata);
 	if (ret)
-		goto err_notifier_put;
+		goto err_runtime_disable;
 
 	ret = component_add(&pdev->dev, &hdmi_component_ops);
 	if (ret)
@@ -2034,8 +2042,7 @@ static int hdmi_probe(struct platform_device *pdev)
 err_unregister_audio:
 	platform_device_unregister(hdata->audio.pdev);
 
-err_notifier_put:
-	cec_notifier_put(hdata->notifier);
+err_runtime_disable:
 	pm_runtime_disable(dev);
 
 err_hdmiphy:
@@ -2054,12 +2061,10 @@ static int hdmi_remove(struct platform_device *pdev)
 	struct hdmi_context *hdata = platform_get_drvdata(pdev);
 
 	cancel_delayed_work_sync(&hdata->hotplug_work);
-	cec_notifier_set_phys_addr(hdata->notifier, CEC_PHYS_ADDR_INVALID);
 
 	component_del(&pdev->dev, &hdmi_component_ops);
 	platform_device_unregister(hdata->audio.pdev);
 
-	cec_notifier_put(hdata->notifier);
 	pm_runtime_disable(&pdev->dev);
 
 	if (!IS_ERR(hdata->reg_hdmi_en))
-- 
2.23.0.rc1.153.gdeed80330f-goog