[PATCH v2 1/3] dt-bindings: media: Add macros for video interface bus types

[Laurent Pinchart]

On Sun, Mar 06, 2022 at 07:39:03PM +0200, Laurent Pinchart wrote:
> Add a new dt-bindings/media/video-interfaces.h header that defines
> macros corresponding to the bus types from media/video-interfaces.yaml.
> This allows avoiding hardcoded constants in device tree sources.
> 
> Signed-off-by: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
> ---
> Changes since v1:
> 
> - Dual-license under GPL-2.0-only or MIT
> - Rename PARALLEL TO BT601

Contrary to popular belief, further investigation revealed that BT.601
doesn't define VSYNC and HSYNC (or HREF, as it is also commonly called)
signals. MEDIA_BUS_TYPE_BT601 is thus likely not a good name. I haven't
been able to find a standard for parallel camera interfaces that would
be a good match here. On the display side there's MIPI DPI, but on the
camera side it seems things have evolved quite organically. I may have
missed something though.

> ---
>  include/dt-bindings/media/video-interfaces.h | 16 ++++++++++++++++
>  1 file changed, 16 insertions(+)
>  create mode 100644 include/dt-bindings/media/video-interfaces.h
> 
> diff --git a/include/dt-bindings/media/video-interfaces.h b/include/dt-bindings/media/video-interfaces.h
> new file mode 100644
> index 000000000000..4c3810edff4c
> --- /dev/null
> +++ b/include/dt-bindings/media/video-interfaces.h
> @@ -0,0 +1,16 @@
> +/* SPDX-License-Identifier: (GPL-2.0-only OR MIT) */
> +/*
> + * Copyright (C) 2022 Laurent Pinchart <laurent.pinchart at ideasonboard.com>
> + */
> +
> +#ifndef __DT_BINDINGS_MEDIA_VIDEO_INTERFACES_H__
> +#define __DT_BINDINGS_MEDIA_VIDEO_INTERFACES_H__
> +
> +#define MEDIA_BUS_TYPE_CSI2_CPHY		1
> +#define MEDIA_BUS_TYPE_CSI1			2
> +#define MEDIA_BUS_TYPE_CCP2			3
> +#define MEDIA_BUS_TYPE_CSI2_DPHY		4
> +#define MEDIA_BUS_TYPE_BT601			5
> +#define MEDIA_BUS_TYPE_BT656			6
> +
> +#endif /* __DT_BINDINGS_MEDIA_VIDEO_INTERFACES_H__ */

-- 
Regards,

Laurent Pinchart