linux/include/media/rcar-fcp.h
Laurent Pinchart 02533540ef v4l: rcar-fcp: Add an API to retrieve the FCP device
The new rcar_fcp_get_device() function retrieves the struct device
related to the FCP device. This is useful to handle DMA mapping through
the right device.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Acked-by: Mauro Cavalho Chehab <mchehab@s-opensource.com>
2017-06-09 12:25:36 +01:00

43 lines
1.3 KiB
C

/*
* rcar-fcp.h -- R-Car Frame Compression Processor Driver
*
* Copyright (C) 2016 Renesas Electronics Corporation
*
* Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#ifndef __MEDIA_RCAR_FCP_H__
#define __MEDIA_RCAR_FCP_H__
struct device_node;
struct rcar_fcp_device;
#if IS_ENABLED(CONFIG_VIDEO_RENESAS_FCP)
struct rcar_fcp_device *rcar_fcp_get(const struct device_node *np);
void rcar_fcp_put(struct rcar_fcp_device *fcp);
struct device *rcar_fcp_get_device(struct rcar_fcp_device *fcp);
int rcar_fcp_enable(struct rcar_fcp_device *fcp);
void rcar_fcp_disable(struct rcar_fcp_device *fcp);
#else
static inline struct rcar_fcp_device *rcar_fcp_get(const struct device_node *np)
{
return ERR_PTR(-ENOENT);
}
static inline void rcar_fcp_put(struct rcar_fcp_device *fcp) { }
static inline struct device *rcar_fcp_get_device(struct rcar_fcp_device *fcp)
{
return NULL;
}
static inline int rcar_fcp_enable(struct rcar_fcp_device *fcp)
{
return 0;
}
static inline void rcar_fcp_disable(struct rcar_fcp_device *fcp) { }
#endif
#endif /* __MEDIA_RCAR_FCP_H__ */