drivers/media/platform/davinci/vpif_display.h

   1 /*
   2  * VPIF display header file
   3  *
   4  * Copyright (C) 2009 Texas Instruments Incorporated - http://www.ti.com/
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License as
   8  * published by the Free Software Foundation version 2.
   9  *
  10  * This program is distributed .as is. WITHOUT ANY WARRANTY of any
  11  * kind, whether express or implied; without even the implied warranty
  12  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  */
  15
  16 #ifndef DAVINCIHD_DISPLAY_H
  17 #define DAVINCIHD_DISPLAY_H
  18
  19 /* Header files */
  20 #include <media/videobuf2-dma-contig.h>
  21 #include <media/v4l2-device.h>
  22
  23 #include "vpif.h"
  24
  25 /* Macros */
  26 #define VPIF_DISPLAY_VERSION    "0.0.2"
  27
  28 #define VPIF_VALID_FIELD(field) \
  29         (((V4L2_FIELD_ANY == field) || (V4L2_FIELD_NONE == field)) || \
  30         (((V4L2_FIELD_INTERLACED == field) || (V4L2_FIELD_SEQ_TB == field)) || \
  31         (V4L2_FIELD_SEQ_BT == field)))
  32
  33 #define VPIF_DISPLAY_MAX_DEVICES        (2)
  34 #define VPIF_SLICED_BUF_SIZE            (256)
  35 #define VPIF_SLICED_MAX_SERVICES        (3)
  36 #define VPIF_VIDEO_INDEX                (0)
  37 #define VPIF_VBI_INDEX                  (1)
  38 #define VPIF_HBI_INDEX                  (2)
  39
  40 /* Setting it to 1 as HBI/VBI support yet to be added , else 3*/
  41 #define VPIF_NUMOBJECTS (1)
  42
  43 /* Macros */
  44 #define ISALIGNED(a)    (0 == ((a) & 7))
  45
  46 /* enumerated data types */
  47 /* Enumerated data type to give id to each device per channel */
  48 enum vpif_channel_id {
  49         VPIF_CHANNEL2_VIDEO = 0,        /* Channel2 Video */
  50         VPIF_CHANNEL3_VIDEO,            /* Channel3 Video */
  51 };
  52
  53 /* structures */
  54
  55 struct video_obj {
  56         enum v4l2_field buf_field;
  57         u32 latest_only;                /* indicate whether to return
  58                                          * most recent displayed frame only */
  59         v4l2_std_id stdid;              /* Currently selected or default
  60                                          * standard */
  61         struct v4l2_dv_timings dv_timings;
  62 };
  63
  64 struct vpif_disp_buffer {
  65         struct vb2_buffer vb;
  66         struct list_head list;
  67 };
  68
  69 struct common_obj {
  70         /* Buffer specific parameters */
  71         u8 *fbuffers[VIDEO_MAX_FRAME];          /* List of buffer pointers for
  72                                                  * storing frames */
  73         u32 numbuffers;                         /* number of buffers */
  74         struct vpif_disp_buffer *cur_frm;       /* Pointer pointing to current
  75                                                  * vb2_buffer */
  76         struct vpif_disp_buffer *next_frm;      /* Pointer pointing to next
  77                                                  * vb2_buffer */
  78         enum v4l2_memory memory;                /* This field keeps track of
  79                                                  * type of buffer exchange
  80                                                  * method user has selected */
  81         struct v4l2_format fmt;                 /* Used to store the format */
  82         struct vb2_queue buffer_queue;          /* Buffer queue used in
  83                                                  * video-buf */
  84         /* allocator-specific contexts for each plane */
  85         struct vb2_alloc_ctx *alloc_ctx;
  86
  87         struct list_head dma_queue;             /* Queue of filled frames */
  88         spinlock_t irqlock;                     /* Used in video-buf */
  89
  90         /* channel specific parameters */
  91         struct mutex lock;                      /* lock used to access this
  92                                                  * structure */
  93         u32 io_usrs;                            /* number of users performing
  94                                                  * IO */
  95         u8 started;                             /* Indicates whether streaming
  96                                                  * started */
  97         u32 ytop_off;                           /* offset of Y top from the
  98                                                  * starting of the buffer */
  99         u32 ybtm_off;                           /* offset of Y bottom from the
 100                                                  * starting of the buffer */
 101         u32 ctop_off;                           /* offset of C top from the
 102                                                  * starting of the buffer */
 103         u32 cbtm_off;                           /* offset of C bottom from the
 104                                                  * starting of the buffer */
 105         /* Function pointer to set the addresses */
 106         void (*set_addr) (unsigned long, unsigned long,
 107                                 unsigned long, unsigned long);
 108         u32 height;
 109         u32 width;
 110 };
 111
 112 struct channel_obj {
 113         /* V4l2 specific parameters */
 114         struct video_device *video_dev; /* Identifies video device for
 115                                          * this channel */
 116         struct v4l2_prio_state prio;    /* Used to keep track of state of
 117                                          * the priority */
 118         atomic_t usrs;                  /* number of open instances of
 119                                          * the channel */
 120         u32 field_id;                   /* Indicates id of the field
 121                                          * which is being displayed */
 122         u8 initialized;                 /* flag to indicate whether
 123                                          * encoder is initialized */
 124         u32 output_idx;                 /* Current output index */
 125         struct v4l2_subdev *sd;         /* Current output subdev(may be NULL) */
 126
 127         enum vpif_channel_id channel_id;/* Identifies channel */
 128         struct vpif_params vpifparams;
 129         struct common_obj common[VPIF_NUMOBJECTS];
 130         struct video_obj video;
 131 };
 132
 133 /* File handle structure */
 134 struct vpif_fh {
 135         struct channel_obj *channel;    /* pointer to channel object for
 136                                          * opened device */
 137         u8 io_allowed[VPIF_NUMOBJECTS]; /* Indicates whether this file handle
 138                                          * is doing IO */
 139         enum v4l2_priority prio;        /* Used to keep track priority of
 140                                          * this instance */
 141         u8 initialized;                 /* Used to keep track of whether this
 142                                          * file handle has initialized
 143                                          * channel or not */
 144 };
 145
 146 /* vpif device structure */
 147 struct vpif_device {
 148         struct v4l2_device v4l2_dev;
 149         struct channel_obj *dev[VPIF_DISPLAY_NUM_CHANNELS];
 150         struct v4l2_subdev **sd;
 151         struct v4l2_async_notifier notifier;
 152         struct vpif_display_config *config;
 153 };
 154
 155 struct vpif_config_params {
 156         u32 min_bufsize[VPIF_DISPLAY_NUM_CHANNELS];
 157         u32 channel_bufsize[VPIF_DISPLAY_NUM_CHANNELS];
 158         u8 numbuffers[VPIF_DISPLAY_NUM_CHANNELS];
 159         u32 video_limit[VPIF_DISPLAY_NUM_CHANNELS];
 160         u8 min_numbuffers;
 161 };
 162
 163 #endif                          /* DAVINCIHD_DISPLAY_H */