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 <linux/videodev2.h>
  21 #include <media/v4l2-common.h>
  22 #include <media/v4l2-device.h>
  23 #include <media/videobuf2-dma-contig.h>
  24 #include <media/davinci/vpif_types.h>
  25
  26 #include "vpif.h"
  27
  28 /* Macros */
  29 #define VPIF_DISPLAY_VERSION    "0.0.2"
  30
  31 #define VPIF_VALID_FIELD(field) \
  32         (((V4L2_FIELD_ANY == field) || (V4L2_FIELD_NONE == field)) || \
  33         (((V4L2_FIELD_INTERLACED == field) || (V4L2_FIELD_SEQ_TB == field)) || \
  34         (V4L2_FIELD_SEQ_BT == field)))
  35
  36 #define VPIF_DISPLAY_MAX_DEVICES        (2)
  37 #define VPIF_SLICED_BUF_SIZE            (256)
  38 #define VPIF_SLICED_MAX_SERVICES        (3)
  39 #define VPIF_VIDEO_INDEX                (0)
  40 #define VPIF_VBI_INDEX                  (1)
  41 #define VPIF_HBI_INDEX                  (2)
  42
  43 /* Setting it to 1 as HBI/VBI support yet to be added , else 3*/
  44 #define VPIF_NUMOBJECTS (1)
  45
  46 /* Macros */
  47 #define ISALIGNED(a)    (0 == ((a) & 7))
  48
  49 /* enumerated data types */
  50 /* Enumerated data type to give id to each device per channel */
  51 enum vpif_channel_id {
  52         VPIF_CHANNEL2_VIDEO = 0,        /* Channel2 Video */
  53         VPIF_CHANNEL3_VIDEO,            /* Channel3 Video */
  54 };
  55
  56 /* structures */
  57
  58 struct video_obj {
  59         enum v4l2_field buf_field;
  60         u32 latest_only;                /* indicate whether to return
  61                                          * most recent displayed frame only */
  62         v4l2_std_id stdid;              /* Currently selected or default
  63                                          * standard */
  64         struct v4l2_dv_timings dv_timings;
  65         u32 output_id;                  /* Current output id */
  66 };
  67
  68 struct vbi_obj {
  69         int num_services;
  70         struct vpif_vbi_params vbiparams;       /* vpif parameters for the raw
  71                                                  * vbi data */
  72 };
  73
  74 struct vpif_disp_buffer {
  75         struct vb2_buffer vb;
  76         struct list_head list;
  77 };
  78
  79 struct common_obj {
  80         /* Buffer specific parameters */
  81         u8 *fbuffers[VIDEO_MAX_FRAME];          /* List of buffer pointers for
  82                                                  * storing frames */
  83         u32 numbuffers;                         /* number of buffers */
  84         struct vpif_disp_buffer *cur_frm;       /* Pointer pointing to current
  85                                                  * vb2_buffer */
  86         struct vpif_disp_buffer *next_frm;      /* Pointer pointing to next
  87                                                  * vb2_buffer */
  88         enum v4l2_memory memory;                /* This field keeps track of
  89                                                  * type of buffer exchange
  90                                                  * method user has selected */
  91         struct v4l2_format fmt;                 /* Used to store the format */
  92         struct vb2_queue buffer_queue;          /* Buffer queue used in
  93                                                  * video-buf */
  94         /* allocator-specific contexts for each plane */
  95         struct vb2_alloc_ctx *alloc_ctx;
  96
  97         struct list_head dma_queue;             /* Queue of filled frames */
  98         spinlock_t irqlock;                     /* Used in video-buf */
  99
 100         /* channel specific parameters */
 101         struct mutex lock;                      /* lock used to access this
 102                                                  * structure */
 103         u32 io_usrs;                            /* number of users performing
 104                                                  * IO */
 105         u8 started;                             /* Indicates whether streaming
 106                                                  * started */
 107         u32 ytop_off;                           /* offset of Y top from the
 108                                                  * starting of the buffer */
 109         u32 ybtm_off;                           /* offset of Y bottom from the
 110                                                  * starting of the buffer */
 111         u32 ctop_off;                           /* offset of C top from the
 112                                                  * starting of the buffer */
 113         u32 cbtm_off;                           /* offset of C bottom from the
 114                                                  * starting of the buffer */
 115         /* Function pointer to set the addresses */
 116         void (*set_addr) (unsigned long, unsigned long,
 117                                 unsigned long, unsigned long);
 118         u32 height;
 119         u32 width;
 120 };
 121
 122 struct channel_obj {
 123         /* V4l2 specific parameters */
 124         struct video_device *video_dev; /* Identifies video device for
 125                                          * this channel */
 126         struct v4l2_prio_state prio;    /* Used to keep track of state of
 127                                          * the priority */
 128         atomic_t usrs;                  /* number of open instances of
 129                                          * the channel */
 130         u32 field_id;                   /* Indicates id of the field
 131                                          * which is being displayed */
 132         u8 initialized;                 /* flag to indicate whether
 133                                          * encoder is initialized */
 134
 135         enum vpif_channel_id channel_id;/* Identifies channel */
 136         struct vpif_params vpifparams;
 137         struct common_obj common[VPIF_NUMOBJECTS];
 138         struct video_obj video;
 139         struct vbi_obj vbi;
 140 };
 141
 142 /* File handle structure */
 143 struct vpif_fh {
 144         struct channel_obj *channel;    /* pointer to channel object for
 145                                          * opened device */
 146         u8 io_allowed[VPIF_NUMOBJECTS]; /* Indicates whether this file handle
 147                                          * is doing IO */
 148         enum v4l2_priority prio;        /* Used to keep track priority of
 149                                          * this instance */
 150         u8 initialized;                 /* Used to keep track of whether this
 151                                          * file handle has initialized
 152                                          * channel or not */
 153 };
 154
 155 /* vpif device structure */
 156 struct vpif_device {
 157         struct v4l2_device v4l2_dev;
 158         struct channel_obj *dev[VPIF_DISPLAY_NUM_CHANNELS];
 159         struct v4l2_subdev **sd;
 160
 161 };
 162
 163 struct vpif_config_params {
 164         u32 min_bufsize[VPIF_DISPLAY_NUM_CHANNELS];
 165         u32 channel_bufsize[VPIF_DISPLAY_NUM_CHANNELS];
 166         u8 numbuffers[VPIF_DISPLAY_NUM_CHANNELS];
 167         u32 video_limit[VPIF_DISPLAY_NUM_CHANNELS];
 168         u8 min_numbuffers;
 169 };
 170
 171 /* Struct which keeps track of the line numbers for the sliced vbi service */
 172 struct vpif_service_line {
 173         u16 service_id;
 174         u16 service_line[2];
 175         u16 enc_service_id;
 176         u8 bytestowrite;
 177 };
 178
 179 #endif                          /* DAVINCIHD_DISPLAY_H */