Re: [PATCH 01/20] drm/i915: Adding drm helper function drm_plane_from_index().

[Matt Roper <matthew.d.roper@intel.com>]

On Wed, Apr 01, 2015 at 07:59:30PM -0700, Chandra Konduru wrote:
> Adding drm helper function to return plane pointer from index where
> index is a returned by drm_plane_index.
> 
> v2:
> -avoided nested loop by adding loop count (Daniel)
> 
> Signed-off-by: Chandra Konduru <chandra.konduru@intel.com>

This should just have a "drm:" headline prefix and should have a Cc:
to dri-devel here since it's touching DRM core code.

Otherwise,

Reviewed-by: Matt Roper <matthew.d.roper@intel.com>


> ---
>  drivers/gpu/drm/drm_crtc.c |   22 ++++++++++++++++++++++
>  include/drm/drm_crtc.h     |    1 +
>  2 files changed, 23 insertions(+)
> 
> diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
> index d576a4d..0f0159b 100644
> --- a/drivers/gpu/drm/drm_crtc.c
> +++ b/drivers/gpu/drm/drm_crtc.c
> @@ -1289,6 +1289,28 @@ unsigned int drm_plane_index(struct drm_plane *plane)
>  EXPORT_SYMBOL(drm_plane_index);
>  
>  /**
> + * drm_plane_from_index - find the registered plane at an index
> + * @idx: index of registered plane to find for
> + *
> + * Given a plane index, return the registered plane from DRM device's
> + * list of planes with matching index.
> + */
> +struct drm_plane *
> +drm_plane_from_index(struct drm_device *dev, int idx)
> +{
> +	struct drm_plane *plane;
> +	unsigned int i = 0;
> +
> +	list_for_each_entry(plane, &dev->mode_config.plane_list, head) {
> +		if (i == idx)
> +			return plane;
> +		i++;
> +	}
> +	return NULL;
> +}
> +EXPORT_SYMBOL(drm_plane_from_index);
> +
> +/**
>   * drm_plane_force_disable - Forcibly disable a plane
>   * @plane: plane to disable
>   *
> diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
> index 7b5c661..6b30036 100644
> --- a/include/drm/drm_crtc.h
> +++ b/include/drm/drm_crtc.h
> @@ -1264,6 +1264,7 @@ extern int drm_plane_init(struct drm_device *dev,
>  			  bool is_primary);
>  extern void drm_plane_cleanup(struct drm_plane *plane);
>  extern unsigned int drm_plane_index(struct drm_plane *plane);
> +extern struct drm_plane * drm_plane_from_index(struct drm_device *dev, int idx);
>  extern void drm_plane_force_disable(struct drm_plane *plane);
>  extern int drm_plane_check_pixel_format(const struct drm_plane *plane,
>  					u32 format);
> -- 
> 1.7.9.5
> 

-- 
Matt Roper
Graphics Software Engineer
IoTG Platform Enabling & Development
Intel Corporation
(916) 356-2795
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