Re: [PATCH] drm: drm_connector->s/connector_id/index/ for consistency

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On Tue, Jul 19, 2016 at 12:57:52PM +0200, Daniel Vetter wrote:
> connector_id in the uapi actually means drm_connector->base.id, which
> is something entirely different. And ->index is also consistent with
> plane/encoder/CRTCS and the various drm_*_index() functions.
> 
> While at it also improve/align the kerneldoc comment.
> 
> v2: Mention where those ids are from ...
> 
> Cc: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
> Cc: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
> Acked-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
> Acked-by: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
> Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxxx>

fixed up the s/support/supporting/ that somehow escape git add and then
pushed to drm-misc.
-Daniel

> ---
>  drivers/gpu/drm/drm_crtc.c | 11 +++++------
>  include/drm/drm_crtc.h     | 13 ++++++++++---
>  2 files changed, 15 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
> index c456628740dd..f9f2506b1855 100644
> --- a/drivers/gpu/drm/drm_crtc.c
> +++ b/drivers/gpu/drm/drm_crtc.c
> @@ -934,11 +934,10 @@ int drm_connector_init(struct drm_device *dev,
>  	connector->dev = dev;
>  	connector->funcs = funcs;
>  
> -	connector->connector_id = ida_simple_get(&config->connector_ida, 0, 0, GFP_KERNEL);
> -	if (connector->connector_id < 0) {
> -		ret = connector->connector_id;
> +	ret = ida_simple_get(&config->connector_ida, 0, 0, GFP_KERNEL);
> +	if (ret < 0)
>  		goto out_put;
> -	}
> +	connector->index = ret;
>  
>  	connector->connector_type = connector_type;
>  	connector->connector_type_id =
> @@ -986,7 +985,7 @@ out_put_type_id:
>  		ida_remove(connector_ida, connector->connector_type_id);
>  out_put_id:
>  	if (ret)
> -		ida_remove(&config->connector_ida, connector->connector_id);
> +		ida_remove(&config->connector_ida, connector->index);
>  out_put:
>  	if (ret)
>  		drm_mode_object_unregister(dev, &connector->base);
> @@ -1030,7 +1029,7 @@ void drm_connector_cleanup(struct drm_connector *connector)
>  		   connector->connector_type_id);
>  
>  	ida_remove(&dev->mode_config.connector_ida,
> -		   connector->connector_id);
> +		   connector->index);
>  
>  	kfree(connector->display_info.bus_formats);
>  	drm_mode_object_unregister(dev, &connector->base);
> diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
> index f8ba5aab5d28..4aa4c4341d01 100644
> --- a/include/drm/drm_crtc.h
> +++ b/include/drm/drm_crtc.h
> @@ -1246,7 +1246,6 @@ struct drm_encoder {
>   * @head: list management
>   * @base: base KMS object
>   * @name: human readable name, can be overwritten by the driver
> - * @connector_id: compacted connector id useful indexing arrays
>   * @connector_type: one of the %DRM_MODE_CONNECTOR_<foo> types from drm_mode.h
>   * @connector_type_id: index into connector type enum
>   * @interlace_allowed: can this connector handle interlaced modes?
> @@ -1303,7 +1302,15 @@ struct drm_connector {
>  	struct drm_mode_object base;
>  
>  	char *name;
> -	int connector_id;
> +
> +	/**
> +	 * @index: Compacted connector index, which matches the position inside
> +	 * the mode_config.list for drivers not support hot-add/removing. Can be
> +	 * used as an array index. It is invariant over the lifetime of the
> +	 * connector.
> +	 */
> +	unsigned index;
> +
>  	int connector_type;
>  	int connector_type_id;
>  	bool interlace_allowed;
> @@ -2764,7 +2771,7 @@ void drm_connector_unregister(struct drm_connector *connector);
>  extern void drm_connector_cleanup(struct drm_connector *connector);
>  static inline unsigned drm_connector_index(struct drm_connector *connector)
>  {
> -	return connector->connector_id;
> +	return connector->index;
>  }
>  
>  extern __printf(5, 6)
> -- 
> 2.8.1
> 

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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