Re: [PATCH v5 02/24] drm: Add drm_connector_init() variant with ddc

[Sam Ravnborg <sam-uyr5N9Q2VtJg9hUCZPvPmw@public.gmane.org>]

Hi Andrzej.

On Wed, Jul 24, 2019 at 03:59:24PM +0200, Andrzej Pietrasiewicz wrote:
> Allow passing ddc adapter pointer to the init function. Even if
> drm_connector_init() sometime in the future decides to e.g. memset() all
> connector fields to zeros, the newly added function ensures that at its
> completion the ddc member of connector is correctly set.
> 
> Signed-off-by: Andrzej Pietrasiewicz <andrzej.p-ZGY8ohtN/8qB+jHODAdFcQ@public.gmane.org>
> ---
>  drivers/gpu/drm/drm_connector.c | 19 +++++++++++++++++++
>  include/drm/drm_connector.h     |  5 +++++
>  2 files changed, 24 insertions(+)
> 
> diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c
> index 068d4b05f1be..06fbfc44fb48 100644
> --- a/drivers/gpu/drm/drm_connector.c
> +++ b/drivers/gpu/drm/drm_connector.c
> @@ -296,6 +296,25 @@ int drm_connector_init(struct drm_device *dev,
>  }
>  EXPORT_SYMBOL(drm_connector_init);
>  
> +int drm_connector_init_with_ddc(struct drm_device *dev,
> +				struct drm_connector *connector,
> +				const struct drm_connector_funcs *funcs,
> +				int connector_type,
> +				struct i2c_adapter *ddc)
> +{

This is good, with this helper there is no longer any confusion about
ordering.

drm_connector_init_with_ddc() is part of the public interface for
drm_connector and needs kernel-doc documentation.

	Sam

> +	int ret;
> +
> +	ret = drm_connector_init(dev, connector, funcs, connector_type);
> +	if (ret)
> +		return ret;
> +
> +	/* provide ddc symlink in sysfs */
> +	connector->ddc = ddc;
> +
> +	return ret;
> +}
> +EXPORT_SYMBOL(drm_connector_init_with_ddc);
> +
>  /**
>   * drm_connector_attach_edid_property - attach edid property.
>   * @connector: the connector
> diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
> index 33a6fff85fdb..937fda9c1374 100644
> --- a/include/drm/drm_connector.h
> +++ b/include/drm/drm_connector.h
> @@ -1410,6 +1410,11 @@ int drm_connector_init(struct drm_device *dev,
>  		       struct drm_connector *connector,
>  		       const struct drm_connector_funcs *funcs,
>  		       int connector_type);
> +int drm_connector_init_with_ddc(struct drm_device *dev,
> +				struct drm_connector *connector,
> +				const struct drm_connector_funcs *funcs,
> +				int connector_type,
> +				struct i2c_adapter *ddc);
>  void drm_connector_attach_edid_property(struct drm_connector *connector);
>  int drm_connector_register(struct drm_connector *connector);
>  void drm_connector_unregister(struct drm_connector *connector);
> -- 
> 2.17.1