LXR linux/include/media/davinci/vpbe

   1/*
   2 * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/
   3 *
   4 * This program is free software; you can redistribute it and/or
   5 * modify it under the terms of the GNU General Public License as
   6 * published by the Free Software Foundation version 2.
   7 *
   8 * This program is distributed WITHOUT ANY WARRANTY of any
   9 * kind, whether express or implied; without even the implied warranty
  10 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11 * GNU General Public License for more details.
  12 */
  13#ifndef VPBE_DISPLAY_H
  14#define VPBE_DISPLAY_H
  15
  16/* Header files */
  17#include <linux/videodev2.h>
  18#include <media/v4l2-common.h>
  19#include <media/v4l2-fh.h>
  20#include <media/videobuf2-dma-contig.h>
  21#include <media/davinci/vpbe_types.h>
  22#include <media/davinci/vpbe_osd.h>
  23#include <media/davinci/vpbe.h>
  24
  25#define VPBE_DISPLAY_MAX_DEVICES 2
  26
  27enum vpbe_display_device_id {
  28        VPBE_DISPLAY_DEVICE_0,
  29        VPBE_DISPLAY_DEVICE_1
  30};
  31
  32#define VPBE_DISPLAY_DRV_NAME   "vpbe-display"
  33
  34#define VPBE_DISPLAY_MAJOR_RELEASE              1
  35#define VPBE_DISPLAY_MINOR_RELEASE              0
  36#define VPBE_DISPLAY_BUILD                      1
  37#define VPBE_DISPLAY_VERSION_CODE ((VPBE_DISPLAY_MAJOR_RELEASE << 16) | \
  38        (VPBE_DISPLAY_MINOR_RELEASE << 8)  | \
  39        VPBE_DISPLAY_BUILD)
  40
  41#define VPBE_DISPLAY_VALID_FIELD(field)   ((V4L2_FIELD_NONE == field) || \
  42         (V4L2_FIELD_ANY == field) || (V4L2_FIELD_INTERLACED == field))
  43
  44/* Exp ratio numerator and denominator constants */
  45#define VPBE_DISPLAY_H_EXP_RATIO_N      9
  46#define VPBE_DISPLAY_H_EXP_RATIO_D      8
  47#define VPBE_DISPLAY_V_EXP_RATIO_N      6
  48#define VPBE_DISPLAY_V_EXP_RATIO_D      5
  49
  50/* Zoom multiplication factor */
  51#define VPBE_DISPLAY_ZOOM_4X    4
  52#define VPBE_DISPLAY_ZOOM_2X    2
  53
  54/* Structures */
  55struct display_layer_info {
  56        int enable;
  57        /* Layer ID used by Display Manager */
  58        enum osd_layer id;
  59        struct osd_layer_config config;
  60        enum osd_zoom_factor h_zoom;
  61        enum osd_zoom_factor v_zoom;
  62        enum osd_h_exp_ratio h_exp;
  63        enum osd_v_exp_ratio v_exp;
  64};
  65
  66struct vpbe_disp_buffer {
  67        struct vb2_buffer vb;
  68        struct list_head list;
  69};
  70
  71/* vpbe display object structure */
  72struct vpbe_layer {
  73        /* number of buffers in fbuffers */
  74        unsigned int numbuffers;
  75        /* Pointer to the vpbe_display */
  76        struct vpbe_display *disp_dev;
  77        /* Pointer pointing to current v4l2_buffer */
  78        struct vpbe_disp_buffer *cur_frm;
  79        /* Pointer pointing to next v4l2_buffer */
  80        struct vpbe_disp_buffer *next_frm;
  81        /* videobuf specific parameters
  82         * Buffer queue used in video-buf
  83         */
  84        struct vb2_queue buffer_queue;
  85        /* allocator-specific contexts for each plane */
  86        struct vb2_alloc_ctx *alloc_ctx;
  87        /* Queue of filled frames */
  88        struct list_head dma_queue;
  89        /* Used in video-buf */
  90        spinlock_t irqlock;
  91        /* V4l2 specific parameters */
  92        /* Identifies video device for this layer */
  93        struct video_device video_dev;
  94        /* This field keeps track of type of buffer exchange mechanism user
  95         * has selected
  96         */
  97        enum v4l2_memory memory;
  98        /* Used to store pixel format */
  99        struct v4l2_pix_format pix_fmt;
 100        enum v4l2_field buf_field;
 101        /* Video layer configuration params */
 102        struct display_layer_info layer_info;
 103        /* vpbe specific parameters
 104         * enable window for display
 105         */
 106        unsigned char window_enable;
 107        /* number of open instances of the layer */
 108        unsigned int usrs;
 109        /* number of users performing IO */
 110        unsigned int io_usrs;
 111        /* Indicates id of the field which is being displayed */
 112        unsigned int field_id;
 113        /* Indicates whether streaming started */
 114        unsigned char started;
 115        /* Identifies device object */
 116        enum vpbe_display_device_id device_id;
 117        /* facilitation of ioctl ops lock by v4l2*/
 118        struct mutex opslock;
 119        u8 layer_first_int;
 120};
 121
 122/* vpbe device structure */
 123struct vpbe_display {
 124        /* layer specific parameters */
 125        /* lock for isr updates to buf layers*/
 126        spinlock_t dma_queue_lock;
 127        /* C-Plane offset from start of y-plane */
 128        unsigned int cbcr_ofst;
 129        struct vpbe_layer *dev[VPBE_DISPLAY_MAX_DEVICES];
 130        struct vpbe_device *vpbe_dev;
 131        struct osd_state *osd_device;
 132};
 133
 134/* File handle structure */
 135struct vpbe_fh {
 136        struct v4l2_fh fh;
 137        /* vpbe device structure */
 138        struct vpbe_display *disp_dev;
 139        /* pointer to layer object for opened device */
 140        struct vpbe_layer *layer;
 141        /* Indicates whether this file handle is doing IO */
 142        unsigned char io_allowed;
 143};
 144
 145struct buf_config_params {
 146        unsigned char min_numbuffers;
 147        unsigned char numbuffers[VPBE_DISPLAY_MAX_DEVICES];
 148        unsigned int min_bufsize[VPBE_DISPLAY_MAX_DEVICES];
 149        unsigned int layer_bufsize[VPBE_DISPLAY_MAX_DEVICES];
 150};
 151
 152#endif  /* VPBE_DISPLAY_H */
 153