Re: [PATCH v6 3/8] tda9950: use cec_notifier_cec_adap_(un)register
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
>> Signed-off-by: Hans Verkuil
>> Tested-by: Hans Verkuil
>> ---
>> 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(_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
>>
>>
>
Re: [PATCH v6 3/8] tda9950: use cec_notifier_cec_adap_(un)register
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
> Signed-off-by: Hans Verkuil
> Tested-by: Hans Verkuil
> ---
> 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(_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
>
>
--
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[PATCH v6 3/8] tda9950: use cec_notifier_cec_adap_(un)register
Use the new cec_notifier_cec_adap_(un)register() functions to
(un)register the notifier for the CEC adapter.
Signed-off-by: Dariusz Marcinkiewicz
Signed-off-by: Hans Verkuil
Tested-by: Hans Verkuil
---
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(_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
