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 
27 enum 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 */
55 struct 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 
66 struct vpbe_disp_buffer {
67 	struct vb2_buffer vb;
68 	struct list_head list;
69 };
70 
71 /* vpbe display object structure */
72 struct vpbe_layer {
73 	/* Pointer to the vpbe_display */
74 	struct vpbe_display *disp_dev;
75 	/* Pointer pointing to current v4l2_buffer */
76 	struct vpbe_disp_buffer *cur_frm;
77 	/* Pointer pointing to next v4l2_buffer */
78 	struct vpbe_disp_buffer *next_frm;
79 	/* videobuf specific parameters
80 	 * Buffer queue used in video-buf
81 	 */
82 	struct vb2_queue buffer_queue;
83 	/* allocator-specific contexts for each plane */
84 	struct vb2_alloc_ctx *alloc_ctx;
85 	/* Queue of filled frames */
86 	struct list_head dma_queue;
87 	/* Used in video-buf */
88 	spinlock_t irqlock;
89 	/* V4l2 specific parameters */
90 	/* Identifies video device for this layer */
91 	struct video_device video_dev;
92 	/* Used to store pixel format */
93 	struct v4l2_pix_format pix_fmt;
94 	enum v4l2_field buf_field;
95 	/* Video layer configuration params */
96 	struct display_layer_info layer_info;
97 	/* vpbe specific parameters
98 	 * enable window for display
99 	 */
100 	unsigned char window_enable;
101 	/* number of open instances of the layer */
102 	unsigned int usrs;
103 	/* Indicates id of the field which is being displayed */
104 	unsigned int field_id;
105 	/* Identifies device object */
106 	enum vpbe_display_device_id device_id;
107 	/* facilitation of ioctl ops lock by v4l2*/
108 	struct mutex opslock;
109 	u8 layer_first_int;
110 };
111 
112 /* vpbe device structure */
113 struct vpbe_display {
114 	/* layer specific parameters */
115 	/* lock for isr updates to buf layers*/
116 	spinlock_t dma_queue_lock;
117 	/* C-Plane offset from start of y-plane */
118 	unsigned int cbcr_ofst;
119 	struct vpbe_layer *dev[VPBE_DISPLAY_MAX_DEVICES];
120 	struct vpbe_device *vpbe_dev;
121 	struct osd_state *osd_device;
122 };
123 
124 struct buf_config_params {
125 	unsigned char min_numbuffers;
126 	unsigned char numbuffers[VPBE_DISPLAY_MAX_DEVICES];
127 	unsigned int min_bufsize[VPBE_DISPLAY_MAX_DEVICES];
128 	unsigned int layer_bufsize[VPBE_DISPLAY_MAX_DEVICES];
129 };
130 
131 #endif	/* VPBE_DISPLAY_H */
132