[PATCH v3 2/3] drm: simple_kms_helper: make connector optional at init time

[Archit Taneja]

On 08/25/2016 02:34 PM, Andrea Merello wrote:
> drm_simple_display_pipe_init() pretends to attach a connector
> to the display pipe.
>
> In case a drm bridge has to be used, then it's the bridge that
> takes care of connectors.
>
> This patch makes the connector parameter optional for
> drm_simple_display_pipe_init(), so that a drm bridge could
> handle connector by itself later.
>

Pushed to drm-misc.

Thanks,
Archit

> Signed-off-by: Andrea Merello <andrea.merello at gmail.com>
> Reviewed-by: Daniel Vetter <daniel.vetter at ffwll.ch>
> Cc: David Airlie <airlied at linux.ie>
> Cc: Noralf Trønnes <noralf at tronnes.org>
> Cc: Daniel Vetter <daniel at ffwll.ch>
> ---
>   drivers/gpu/drm/drm_simple_kms_helper.c | 11 ++++++++---
>   1 file changed, 8 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_simple_kms_helper.c b/drivers/gpu/drm/drm_simple_kms_helper.c
> index 4476310..3301e4a 100644
> --- a/drivers/gpu/drm/drm_simple_kms_helper.c
> +++ b/drivers/gpu/drm/drm_simple_kms_helper.c
> @@ -146,10 +146,15 @@ static const struct drm_plane_funcs drm_simple_kms_plane_funcs = {
>    * @funcs: callbacks for the display pipe (optional)
>    * @formats: array of supported formats (DRM_FORMAT\_\*)
>    * @format_count: number of elements in @formats
> - * @connector: connector to attach and register
> + * @connector: connector to attach and register (optional)
>    *
>    * Sets up a display pipeline which consist of a really simple
> - * plane-crtc-encoder pipe coupled with the provided connector.
> + * plane-crtc-encoder pipe.
> + *
> + * If a connector is supplied, the pipe will be coupled with the provided
> + * connector. You may supply a NULL connector when using drm bridges, that
> + * handle connectors themselves (see drm_simple_display_pipe_attach_bridge()).
> + *
>    * Teardown of a simple display pipe is all handled automatically by the drm
>    * core through calling drm_mode_config_cleanup(). Drivers afterwards need to
>    * release the memory for the structure themselves.
> @@ -188,7 +193,7 @@ int drm_simple_display_pipe_init(struct drm_device *dev,
>   	encoder->possible_crtcs = 1 << drm_crtc_index(crtc);
>   	ret = drm_encoder_init(dev, encoder, &drm_simple_kms_encoder_funcs,
>   			       DRM_MODE_ENCODER_NONE, NULL);
> -	if (ret)
> +	if (ret || !connector)
>   		return ret;
>
>   	return drm_mode_connector_attach_encoder(connector, encoder);
>

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