Re: [PATCHv9 2/2] drm: tda998x: set the connector info

[Russell King - ARM Linux admin <linux@armlinux.org.uk>]

On Thu, Oct 17, 2019 at 09:28:42AM +0200, Hans Verkuil wrote:
> From: Dariusz Marcinkiewicz <darekm@google.com>
> 
> Fill in the cec_connector_info when calling cec_notifier_conn_register().
> 
> Signed-off-by: Dariusz Marcinkiewicz <darekm@google.com>
> Tested-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
> ---
>  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.

> +
>  	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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