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/videobuf2-dma-contig.h>
  20#include <media/davinci/vpbe_types.h>
  21#include <media/davinci/vpbe_osd.h>
  22#include <media/davinci/vpbe.h>
  23
  24#define VPBE_DISPLAY_MAX_DEVICES 2
  25
  26enum vpbe_display_device_id {
  27        VPBE_DISPLAY_DEVICE_0,
  28        VPBE_DISPLAY_DEVICE_1
  29};
  30
  31#define VPBE_DISPLAY_DRV_NAME   "vpbe-display"
  32
  33#define VPBE_DISPLAY_MAJOR_RELEASE              1
  34#define VPBE_DISPLAY_MINOR_RELEASE              0
  35#define VPBE_DISPLAY_BUILD                      1
  36#define VPBE_DISPLAY_VERSION_CODE ((VPBE_DISPLAY_MAJOR_RELEASE << 16) | \
  37        (VPBE_DISPLAY_MINOR_RELEASE << 8)  | \
  38        VPBE_DISPLAY_BUILD)
  39
  40#define VPBE_DISPLAY_VALID_FIELD(field)   ((V4L2_FIELD_NONE == field) || \
  41         (V4L2_FIELD_ANY == field) || (V4L2_FIELD_INTERLACED == field))
  42
  43/* Exp ratio numerator and denominator constants */
  44#define VPBE_DISPLAY_H_EXP_RATIO_N      9
  45#define VPBE_DISPLAY_H_EXP_RATIO_D      8
  46#define VPBE_DISPLAY_V_EXP_RATIO_N      6
  47#define VPBE_DISPLAY_V_EXP_RATIO_D      5
  48
  49/* Zoom multiplication factor */
  50#define VPBE_DISPLAY_ZOOM_4X    4
  51#define VPBE_DISPLAY_ZOOM_2X    2
  52
  53/* Structures */
  54struct display_layer_info {
  55        int enable;
  56        /* Layer ID used by Display Manager */
  57        enum osd_layer id;
  58        struct osd_layer_config config;
  59        enum osd_zoom_factor h_zoom;
  60        enum osd_zoom_factor v_zoom;
  61        enum osd_h_exp_ratio h_exp;
  62        enum osd_v_exp_ratio v_exp;
  63};
  64
  65struct vpbe_disp_buffer {
  66        struct vb2_buffer vb;
  67        struct list_head list;
  68};
  69
  70/* vpbe display object structure */
  71struct vpbe_layer {
  72        /* number of buffers in fbuffers */
  73        unsigned int numbuffers;
  74        /* Pointer to the vpbe_display */
  75        struct vpbe_display *disp_dev;
  76        /* Pointer pointing to current v4l2_buffer */
  77        struct vpbe_disp_buffer *cur_frm;
  78        /* Pointer pointing to next v4l2_buffer */
  79        struct vpbe_disp_buffer *next_frm;
  80        /* videobuf specific parameters
  81         * Buffer queue used in video-buf
  82         */
  83        struct vb2_queue buffer_queue;
  84        /* allocator-specific contexts for each plane */
  85        struct vb2_alloc_ctx *alloc_ctx;
  86        /* Queue of filled frames */
  87        struct list_head dma_queue;
  88        /* Used in video-buf */
  89        spinlock_t irqlock;
  90        /* V4l2 specific parameters */
  91        /* Identifies video device for this layer */
  92        struct video_device video_dev;
  93        /* This field keeps track of type of buffer exchange mechanism user
  94         * has selected
  95         */
  96        enum v4l2_memory memory;
  97        /* Used to keep track of state of the priority */
  98        struct v4l2_prio_state prio;
  99        /* Used to store pixel format */
 100        struct v4l2_pix_format pix_fmt;
 101        enum v4l2_field buf_field;
 102        /* Video layer configuration params */
 103        struct display_layer_info layer_info;
 104        /* vpbe specific parameters
 105         * enable window for display
 106         */
 107        unsigned char window_enable;
 108        /* number of open instances of the layer */
 109        unsigned int usrs;
 110        /* number of users performing IO */
 111        unsigned int io_usrs;
 112        /* Indicates id of the field which is being displayed */
 113        unsigned int field_id;
 114        /* Indicates whether streaming started */
 115        unsigned char started;
 116        /* Identifies device object */
 117        enum vpbe_display_device_id device_id;
 118        /* facilitation of ioctl ops lock by v4l2*/
 119        struct mutex opslock;
 120        u8 layer_first_int;
 121};
 122
 123/* vpbe device structure */
 124struct vpbe_display {
 125        /* layer specific parameters */
 126        /* lock for isr updates to buf layers*/
 127        spinlock_t dma_queue_lock;
 128        /* C-Plane offset from start of y-plane */
 129        unsigned int cbcr_ofst;
 130        struct vpbe_layer *dev[VPBE_DISPLAY_MAX_DEVICES];
 131        struct vpbe_device *vpbe_dev;
 132        struct osd_state *osd_device;
 133};
 134
 135/* File handle structure */
 136struct vpbe_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        /* Used to keep track priority of this instance */
 144        enum v4l2_priority prio;
 145};
 146
 147struct buf_config_params {
 148        unsigned char min_numbuffers;
 149        unsigned char numbuffers[VPBE_DISPLAY_MAX_DEVICES];
 150        unsigned int min_bufsize[VPBE_DISPLAY_MAX_DEVICES];
 151        unsigned int layer_bufsize[VPBE_DISPLAY_MAX_DEVICES];
 152};
 153
 154#endif  /* VPBE_DISPLAY_H */
 155