On 10/17/19 10:11 AM, Russell King - ARM Linux admin wrote:
> On Thu, Oct 17, 2019 at 09:28:42AM +0200, Hans Verkuil wrote:
>> From: Dariusz Marcinkiewicz <darekm@xxxxxxxxxx>
>>
>> Fill in the cec_connector_info when calling cec_notifier_conn_register().
>>
>> Signed-off-by: Dariusz Marcinkiewicz <darekm@xxxxxxxxxx>
>> Tested-by: Hans Verkuil <hverkuil-cisco@xxxxxxxxx>
>> Signed-off-by: Hans Verkuil <hverkuil-cisco@xxxxxxxxx>
>> ---
>> drivers/gpu/drm/i2c/tda998x_drv.c | 33 +++++++++++++++++++++++--------
>> 1 file changed, 25 insertions(+), 8 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/i2c/tda998x_drv.c b/drivers/gpu/drm/i2c/tda998x_drv.c
>> index dde8decb52a6..b0620842fa3a 100644
>> --- a/drivers/gpu/drm/i2c/tda998x_drv.c
>> +++ b/drivers/gpu/drm/i2c/tda998x_drv.c
>> @@ -82,6 +82,9 @@ struct tda998x_priv {
>> u8 audio_port_enable[AUDIO_ROUTE_NUM];
>> struct tda9950_glue cec_glue;
>> struct gpio_desc *calib;
>> +
>> + /* protect cec_notify */
>> + struct mutex cec_notify_mutex;
>> struct cec_notifier *cec_notify;
>> };
>>
>> @@ -805,8 +808,11 @@ static irqreturn_t tda998x_irq_thread(int irq, void *data)
>> tda998x_edid_delay_start(priv);
>> } else {
>> schedule_work(&priv->detect_work);
>> +
>> + mutex_lock(&priv->cec_notify_mutex);
>> cec_notifier_phys_addr_invalidate(
>> priv->cec_notify);
>> + mutex_unlock(&priv->cec_notify_mutex);
>> }
>>
>> handled = true;
>> @@ -1331,6 +1337,8 @@ 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 +1355,17 @@ 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;
>> +
>> + mutex_lock(&priv->cec_notify_mutex);
>> + priv->cec_notify = notifier;
>> + mutex_unlock(&priv->cec_notify_mutex);
>
> You haven't taken on board what I said about the mutex in this
> instance.
That's because I didn't. See the cover letter.
I need this info from the author of the patch, Dariusz. Once I have that,
and we agree with the reasoning, then I'll post a new patch for it.
For now all I am interested in is getting patch 1/2 merged. Patch 2/2 won't
be merged any time soon.
Regards,
Hans
>
>> +
>> drm_connector_attach_encoder(&priv->connector,
>> priv->bridge.encoder);
>>
>> @@ -1366,6 +1385,11 @@ static void tda998x_bridge_detach(struct drm_bridge *bridge)
>> {
>> struct tda998x_priv *priv = bridge_to_tda998x_priv(bridge);
>>
>> + mutex_lock(&priv->cec_notify_mutex);
>> + cec_notifier_conn_unregister(priv->cec_notify);
>> + priv->cec_notify = NULL;
>> + mutex_unlock(&priv->cec_notify_mutex);
>> +
>> drm_connector_cleanup(&priv->connector);
>> }
>>
>> @@ -1789,8 +1813,6 @@ static void tda998x_destroy(struct device *dev)
>> cancel_work_sync(&priv->detect_work);
>>
>> i2c_unregister_device(priv->cec);
>> -
>> - cec_notifier_conn_unregister(priv->cec_notify);
>> }
>>
>> static int tda998x_create(struct device *dev)
>> @@ -1811,6 +1833,7 @@ static int tda998x_create(struct device *dev)
>> mutex_init(&priv->mutex); /* protect the page access */
>> mutex_init(&priv->audio_mutex); /* protect access from audio thread */
>> mutex_init(&priv->edid_mutex);
>> + mutex_init(&priv->cec_notify_mutex);
>> INIT_LIST_HEAD(&priv->bridge.list);
>> init_waitqueue_head(&priv->edid_delay_waitq);
>> timer_setup(&priv->edid_delay_timer, tda998x_edid_delay_done, 0);
>> @@ -1915,12 +1938,6 @@ static int tda998x_create(struct device *dev)
>> cec_write(priv, REG_CEC_RXSHPDINTENA, CEC_RXSHPDLEV_HPD);
>> }
>>
>> - priv->cec_notify = cec_notifier_conn_register(dev, NULL, NULL);
>> - 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
>>
>>
>
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