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/*
* ispvideo.h
*
* TI OMAP3 ISP - Generic video node
*
* Copyright (C) 2009-2010 Nokia Corporation
*
* Contacts: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
* Sakari Ailus <sakari.ailus@iki.fi>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef OMAP3_ISP_VIDEO_H
#define OMAP3_ISP_VIDEO_H
#include <linux/v4l2-mediabus.h>
#include <media/media-entity.h>
#include <media/v4l2-dev.h>
#include <media/v4l2-fh.h>
#include <media/videobuf2-v4l2.h>
#define ISP_VIDEO_DRIVER_NAME "ispvideo"
#define ISP_VIDEO_DRIVER_VERSION "0.0.2"
struct isp_device;
struct isp_video;
struct v4l2_mbus_framefmt;
struct v4l2_pix_format;
/*
* struct isp_format_info - ISP media bus format information
* @code: V4L2 media bus format code
* @truncated: V4L2 media bus format code for the same format truncated to 10
* bits. Identical to @code if the format is 10 bits wide or less.
* @uncompressed: V4L2 media bus format code for the corresponding uncompressed
* format. Identical to @code if the format is not DPCM compressed.
* @flavor: V4L2 media bus format code for the same pixel layout but
* shifted to be 8 bits per pixel. =0 if format is not shiftable.
* @pixelformat: V4L2 pixel format FCC identifier
* @width: Bits per pixel (when transferred over a bus)
* @bpp: Bytes per pixel (when stored in memory)
*/
struct isp_format_info {
u32 code;
u32 truncated;
u32 uncompressed;
u32 flavor;
u32 pixelformat;
unsigned int width;
unsigned int bpp;
};
enum isp_pipeline_stream_state {
ISP_PIPELINE_STREAM_STOPPED = 0,
ISP_PIPELINE_STREAM_CONTINUOUS = 1,
ISP_PIPELINE_STREAM_SINGLESHOT = 2,
};
enum isp_pipeline_state {
/* The stream has been started on the input video node. */
ISP_PIPELINE_STREAM_INPUT = 1,
/* The stream has been started on the output video node. */
ISP_PIPELINE_STREAM_OUTPUT = 2,
/* At least one buffer is queued on the input video node. */
ISP_PIPELINE_QUEUE_INPUT = 4,
/* At least one buffer is queued on the output video node. */
ISP_PIPELINE_QUEUE_OUTPUT = 8,
/* The input entity is idle, ready to be started. */
ISP_PIPELINE_IDLE_INPUT = 16,
/* The output entity is idle, ready to be started. */
ISP_PIPELINE_IDLE_OUTPUT = 32,
/* The pipeline is currently streaming. */
ISP_PIPELINE_STREAM = 64,
};
/*
* struct isp_pipeline - An ISP hardware pipeline
* @field: The field being processed by the pipeline
* @error: A hardware error occurred during capture
* @entities: Bitmask of entities in the pipeline (indexed by entity ID)
*/
struct isp_pipeline {
struct media_pipeline pipe;
spinlock_t lock; /* Pipeline state and queue flags */
unsigned int state;
enum isp_pipeline_stream_state stream_state;
struct isp_video *input;
struct isp_video *output;
u32 entities;
unsigned long l3_ick;
unsigned int max_rate;
enum v4l2_field field;
atomic_t frame_number;
bool do_propagation; /* of frame number */
bool error;
struct v4l2_fract max_timeperframe;
struct v4l2_subdev *external;
unsigned int external_rate;
unsigned int external_width;
};
#define to_isp_pipeline(__e) \
container_of((__e)->pipe, struct isp_pipeline, pipe)
static inline int isp_pipeline_ready(struct isp_pipeline *pipe)
{
return pipe->state == (ISP_PIPELINE_STREAM_INPUT |
ISP_PIPELINE_STREAM_OUTPUT |
ISP_PIPELINE_QUEUE_INPUT |
ISP_PIPELINE_QUEUE_OUTPUT |
ISP_PIPELINE_IDLE_INPUT |
ISP_PIPELINE_IDLE_OUTPUT);
}
/**
* struct isp_buffer - ISP video buffer
* @vb: videobuf2 buffer
* @irqlist: List head for insertion into IRQ queue
* @dma: DMA address
*/
struct isp_buffer {
struct vb2_buffer vb;
struct list_head irqlist;
dma_addr_t dma;
};
#define to_isp_buffer(buf) container_of(buf, struct isp_buffer, vb)
enum isp_video_dmaqueue_flags {
/* Set if DMA queue becomes empty when ISP_PIPELINE_STREAM_CONTINUOUS */
ISP_VIDEO_DMAQUEUE_UNDERRUN = (1 << 0),
/* Set when queuing buffer to an empty DMA queue */
ISP_VIDEO_DMAQUEUE_QUEUED = (1 << 1),
};
#define isp_video_dmaqueue_flags_clr(video) \
({ (video)->dmaqueue_flags = 0; })
/*
* struct isp_video_operations - ISP video operations
* @queue: Resume streaming when a buffer is queued. Called on VIDIOC_QBUF
* if there was no buffer previously queued.
*/
struct isp_video_operations {
int(*queue)(struct isp_video *video, struct isp_buffer *buffer);
};
struct isp_video {
struct video_device video;
enum v4l2_buf_type type;
struct media_pad pad;
struct mutex mutex; /* format and crop settings */
atomic_t active;
struct isp_device *isp;
unsigned int capture_mem;
unsigned int bpl_alignment; /* alignment value */
unsigned int bpl_zero_padding; /* whether the alignment is optional */
unsigned int bpl_max; /* maximum bytes per line value */
unsigned int bpl_value; /* bytes per line value */
unsigned int bpl_padding; /* padding at end of line */
/* Pipeline state */
struct isp_pipeline pipe;
struct mutex stream_lock; /* pipeline and stream states */
bool error;
/* Video buffers queue */
void *alloc_ctx;
struct vb2_queue *queue;
struct mutex queue_lock; /* protects the queue */
spinlock_t irqlock; /* protects dmaqueue */
struct list_head dmaqueue;
enum isp_video_dmaqueue_flags dmaqueue_flags;
const struct isp_video_operations *ops;
};
#define to_isp_video(vdev) container_of(vdev, struct isp_video, video)
struct isp_video_fh {
struct v4l2_fh vfh;
struct isp_video *video;
struct vb2_queue queue;
struct v4l2_format format;
struct v4l2_fract timeperframe;
};
#define to_isp_video_fh(fh) container_of(fh, struct isp_video_fh, vfh)
#define isp_video_queue_to_isp_video_fh(q) \
container_of(q, struct isp_video_fh, queue)
int omap3isp_video_init(struct isp_video *video, const char *name);
void omap3isp_video_cleanup(struct isp_video *video);
int omap3isp_video_register(struct isp_video *video,
struct v4l2_device *vdev);
void omap3isp_video_unregister(struct isp_video *video);
struct isp_buffer *omap3isp_video_buffer_next(struct isp_video *video);
void omap3isp_video_cancel_stream(struct isp_video *video);
void omap3isp_video_resume(struct isp_video *video, int continuous);
struct media_pad *omap3isp_video_remote_pad(struct isp_video *video);
const struct isp_format_info *
omap3isp_video_format_info(u32 code);
#endif /* OMAP3_ISP_VIDEO_H */
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