include/media/davinci/vpbe_display.h

   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-v4l2.h>
  21 #include <media/videobuf2-dma-contig.h>
  22 #include <media/davinci/vpbe_types.h>
  23 #include <media/davinci/vpbe_osd.h>
  24 #include <media/davinci/vpbe.h>
  25
  26 #define VPBE_DISPLAY_MAX_DEVICES 2
  27
  28 enum vpbe_display_device_id {
  29         VPBE_DISPLAY_DEVICE_0,
  30         VPBE_DISPLAY_DEVICE_1
  31 };
  32
  33 #define VPBE_DISPLAY_DRV_NAME   "vpbe-display"
  34
  35 #define VPBE_DISPLAY_MAJOR_RELEASE              1
  36 #define VPBE_DISPLAY_MINOR_RELEASE              0
  37 #define VPBE_DISPLAY_BUILD                      1
  38 #define VPBE_DISPLAY_VERSION_CODE ((VPBE_DISPLAY_MAJOR_RELEASE << 16) | \
  39         (VPBE_DISPLAY_MINOR_RELEASE << 8)  | \
  40         VPBE_DISPLAY_BUILD)
  41
  42 #define VPBE_DISPLAY_VALID_FIELD(field)   ((V4L2_FIELD_NONE == field) || \
  43          (V4L2_FIELD_ANY == field) || (V4L2_FIELD_INTERLACED == field))
  44
  45 /* Exp ratio numerator and denominator constants */
  46 #define VPBE_DISPLAY_H_EXP_RATIO_N      9
  47 #define VPBE_DISPLAY_H_EXP_RATIO_D      8
  48 #define VPBE_DISPLAY_V_EXP_RATIO_N      6
  49 #define VPBE_DISPLAY_V_EXP_RATIO_D      5
  50
  51 /* Zoom multiplication factor */
  52 #define VPBE_DISPLAY_ZOOM_4X    4
  53 #define VPBE_DISPLAY_ZOOM_2X    2
  54
  55 /* Structures */
  56 struct display_layer_info {
  57         int enable;
  58         /* Layer ID used by Display Manager */
  59         enum osd_layer id;
  60         struct osd_layer_config config;
  61         enum osd_zoom_factor h_zoom;
  62         enum osd_zoom_factor v_zoom;
  63         enum osd_h_exp_ratio h_exp;
  64         enum osd_v_exp_ratio v_exp;
  65 };
  66
  67 struct vpbe_disp_buffer {
  68         struct vb2_v4l2_buffer vb;
  69         struct list_head list;
  70 };
  71
  72 /* vpbe display object structure */
  73 struct vpbe_layer {
  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         /* Used to store pixel format */
  94         struct v4l2_pix_format pix_fmt;
  95         enum v4l2_field buf_field;
  96         /* Video layer configuration params */
  97         struct display_layer_info layer_info;
  98         /* vpbe specific parameters
  99          * enable window for display
 100          */
 101         unsigned char window_enable;
 102         /* number of open instances of the layer */
 103         unsigned int usrs;
 104         /* Indicates id of the field which is being displayed */
 105         unsigned int field_id;
 106         /* Identifies device object */
 107         enum vpbe_display_device_id device_id;
 108         /* facilitation of ioctl ops lock by v4l2*/
 109         struct mutex opslock;
 110         u8 layer_first_int;
 111 };
 112
 113 /* vpbe device structure */
 114 struct vpbe_display {
 115         /* layer specific parameters */
 116         /* lock for isr updates to buf layers*/
 117         spinlock_t dma_queue_lock;
 118         /* C-Plane offset from start of y-plane */
 119         unsigned int cbcr_ofst;
 120         struct vpbe_layer *dev[VPBE_DISPLAY_MAX_DEVICES];
 121         struct vpbe_device *vpbe_dev;
 122         struct osd_state *osd_device;
 123 };
 124
 125 struct buf_config_params {
 126         unsigned char min_numbuffers;
 127         unsigned char numbuffers[VPBE_DISPLAY_MAX_DEVICES];
 128         unsigned int min_bufsize[VPBE_DISPLAY_MAX_DEVICES];
 129         unsigned int layer_bufsize[VPBE_DISPLAY_MAX_DEVICES];
 130 };
 131
 132 #endif  /* VPBE_DISPLAY_H */