cregit-Linux how code gets into the kernel

Release 4.7 drivers/media/platform/davinci/vpif_display.h

/*
 * VPIF display header file
 *
 * Copyright (C) 2009 Texas Instruments Incorporated - http://www.ti.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 version 2.
 *
 * This program is distributed .as is. WITHOUT ANY WARRANTY of any
 * kind, whether express or implied; without even the implied warranty
 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#ifndef VPIF_DISPLAY_H

#define VPIF_DISPLAY_H

/* Header files */
#include <media/videobuf2-dma-contig.h>
#include <media/v4l2-device.h>

#include "vpif.h"

/* Macros */

#define VPIF_DISPLAY_VERSION	"0.0.2"


#define VPIF_VALID_FIELD(field) \
	(((V4L2_FIELD_ANY == field) || (V4L2_FIELD_NONE == field)) || \
        (((V4L2_FIELD_INTERLACED == field) || (V4L2_FIELD_SEQ_TB == field)) || \
        (V4L2_FIELD_SEQ_BT == field)))


#define VPIF_DISPLAY_MAX_DEVICES	(2)

#define VPIF_SLICED_BUF_SIZE		(256)

#define VPIF_SLICED_MAX_SERVICES	(3)

#define VPIF_VIDEO_INDEX		(0)

#define VPIF_VBI_INDEX			(1)

#define VPIF_HBI_INDEX			(2)

/* Setting it to 1 as HBI/VBI support yet to be added , else 3*/

#define VPIF_NUMOBJECTS	(1)

/* Macros */

#define ISALIGNED(a)    (0 == ((a) & 7))

/* enumerated data types */
/* Enumerated data type to give id to each device per channel */

enum vpif_channel_id {
	
VPIF_CHANNEL2_VIDEO = 0,	/* Channel2 Video */
	
VPIF_CHANNEL3_VIDEO,		/* Channel3 Video */
};

/* structures */


struct video_obj {
	
enum v4l2_field buf_field;
	
u32 latest_only;		/* indicate whether to return
                                         * most recent displayed frame only */
	
v4l2_std_id stdid;		/* Currently selected or default
                                         * standard */
	
struct v4l2_dv_timings dv_timings;
};


struct vpif_disp_buffer {
	
struct vb2_v4l2_buffer vb;
	
struct list_head list;
};


struct common_obj {
	
struct vpif_disp_buffer *cur_frm;	/* Pointer pointing to current
                                                 * vb2_buffer */
	
struct vpif_disp_buffer *next_frm;	/* Pointer pointing to next
                                                 * vb2_buffer */
	
struct v4l2_format fmt;			/* Used to store the format */
	
struct vb2_queue buffer_queue;		/* Buffer queue used in
                                                 * video-buf */
	/* allocator-specific contexts for each plane */
	
struct vb2_alloc_ctx *alloc_ctx;

	
struct list_head dma_queue;		/* Queue of filled frames */
	
spinlock_t irqlock;			/* Used in video-buf */

	/* channel specific parameters */
	
struct mutex lock;			/* lock used to access this
                                                 * structure */
	
u32 ytop_off;				/* offset of Y top from the
                                                 * starting of the buffer */
	
u32 ybtm_off;				/* offset of Y bottom from the
                                                 * starting of the buffer */
	
u32 ctop_off;				/* offset of C top from the
                                                 * starting of the buffer */
	
u32 cbtm_off;				/* offset of C bottom from the
                                                 * starting of the buffer */
	/* Function pointer to set the addresses */
	
void (*set_addr)(unsigned long, unsigned long,
				unsigned long, unsigned long);
	
u32 height;
	
u32 width;
};


struct channel_obj {
	/* V4l2 specific parameters */
	
struct video_device video_dev;	/* Identifies video device for
                                         * this channel */
	
u32 field_id;			/* Indicates id of the field
                                         * which is being displayed */
	
u8 initialized;			/* flag to indicate whether
                                         * encoder is initialized */
	
u32 output_idx;			/* Current output index */
	
struct v4l2_subdev *sd;		/* Current output subdev(may be NULL) */

	
enum vpif_channel_id channel_id;/* Identifies channel */
	
struct vpif_params vpifparams;
	
struct common_obj common[VPIF_NUMOBJECTS];
	
struct video_obj video;
};

/* vpif device structure */

struct vpif_device {
	
struct v4l2_device v4l2_dev;
	
struct channel_obj *dev[VPIF_DISPLAY_NUM_CHANNELS];
	
struct v4l2_subdev **sd;
	
struct v4l2_async_notifier notifier;
	
struct vpif_display_config *config;
};

#endif				/* VPIF_DISPLAY_H */

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