[PATCH v3 3/3] drm: simple_kms_helper: add support for bridges

[Archit Taneja]

On 08/25/2016 02:34 PM, Andrea Merello wrote:
> Introduce drm_simple_display_pipe_attach_bridge() and
> drm_simple_display_pipe_detach_bridge() in order to make it possible to use
> drm encoders with the simple display pipes managed by simple_kms_helpers
>
> Suggested-by: Daniel Vetter <daniel at ffwll.ch>
> Signed-off-by: Andrea Merello <andrea.merello at gmail.com>
> Reviewed-by: Daniel Vetter <daniel.vetter at ffwll.ch>


Pushed to drm-misc.

Thanks,
Archit

> Cc: Noralf Trønnes <noralf at tronnes.org>
> Cc: Daniel Vetter <daniel at ffwll.ch>
> Cc: David Airlie <airlied at linux.ie>
> ---
>   drivers/gpu/drm/drm_simple_kms_helper.c | 40 +++++++++++++++++++++++++++++++++
>   include/drm/drm_simple_kms_helper.h     |  5 +++++
>   2 files changed, 45 insertions(+)
>
> diff --git a/drivers/gpu/drm/drm_simple_kms_helper.c b/drivers/gpu/drm/drm_simple_kms_helper.c
> index 3301e4a..8e9858b 100644
> --- a/drivers/gpu/drm/drm_simple_kms_helper.c
> +++ b/drivers/gpu/drm/drm_simple_kms_helper.c
> @@ -140,6 +140,46 @@ static const struct drm_plane_funcs drm_simple_kms_plane_funcs = {
>   };
>
>   /**
> + * drm_simple_display_pipe_attach_bridge - Attach a bridge to the display pipe
> + * @pipe: simple display pipe object
> + * @bridge: bridge to attach
> + *
> + * Makes it possible to still use the drm_simple_display_pipe helpers when
> + * a DRM bridge has to be used.
> + *
> + * Note that you probably want to initialize the pipe by passing a NULL
> + * connector to drm_simple_display_pipe_init().
> + *
> + * Returns:
> + * Zero on success, negative error code on failure.
> + */
> +int drm_simple_display_pipe_attach_bridge(struct drm_simple_display_pipe *pipe,
> +					struct drm_bridge *bridge)
> +{
> +	bridge->encoder = &pipe->encoder;
> +	pipe->encoder.bridge = bridge;
> +	return drm_bridge_attach(pipe->encoder.dev, bridge);
> +}
> +EXPORT_SYMBOL(drm_simple_display_pipe_attach_bridge);
> +
> +/**
> + * drm_simple_display_pipe_detach_bridge - Detach the bridge from the display pipe
> + * @pipe: simple display pipe object
> + *
> + * Detaches the drm bridge previously attached with
> + * drm_simple_display_pipe_attach_bridge()
> + */
> +void drm_simple_display_pipe_detach_bridge(struct drm_simple_display_pipe *pipe)
> +{
> +	if (WARN_ON(!pipe->encoder.bridge))
> +		return;
> +
> +	drm_bridge_detach(pipe->encoder.bridge);
> +	pipe->encoder.bridge = NULL;
> +}
> +EXPORT_SYMBOL(drm_simple_display_pipe_detach_bridge);
> +
> +/**
>    * drm_simple_display_pipe_init - Initialize a simple display pipeline
>    * @dev: DRM device
>    * @pipe: simple display pipe object to initialize
> diff --git a/include/drm/drm_simple_kms_helper.h b/include/drm/drm_simple_kms_helper.h
> index 2690397..5245d1f 100644
> --- a/include/drm/drm_simple_kms_helper.h
> +++ b/include/drm/drm_simple_kms_helper.h
> @@ -85,6 +85,11 @@ struct drm_simple_display_pipe {
>   	const struct drm_simple_display_pipe_funcs *funcs;
>   };
>
> +int drm_simple_display_pipe_attach_bridge(struct drm_simple_display_pipe *pipe,
> +					struct drm_bridge *bridge);
> +
> +void drm_simple_display_pipe_detach_bridge(struct drm_simple_display_pipe *pipe);
> +
>   int drm_simple_display_pipe_init(struct drm_device *dev,
>   			struct drm_simple_display_pipe *pipe,
>   			const struct drm_simple_display_pipe_funcs *funcs,
>

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