2 * Copyright 2012 Steffen Trumtrar <s.trumtrar@pengutronix.de>
4 * description of display timings
6 * This file is released under the GPLv2
9 #ifndef __LINUX_DISPLAY_TIMING_H
10 #define __LINUX_DISPLAY_TIMING_H
12 #include <linux/bitops.h>
13 #include <linux/types.h>
16 DISPLAY_FLAGS_HSYNC_LOW = BIT(0),
17 DISPLAY_FLAGS_HSYNC_HIGH = BIT(1),
18 DISPLAY_FLAGS_VSYNC_LOW = BIT(2),
19 DISPLAY_FLAGS_VSYNC_HIGH = BIT(3),
21 /* data enable flag */
22 DISPLAY_FLAGS_DE_LOW = BIT(4),
23 DISPLAY_FLAGS_DE_HIGH = BIT(5),
24 /* drive data on pos. edge */
25 DISPLAY_FLAGS_PIXDATA_POSEDGE = BIT(6),
26 /* drive data on neg. edge */
27 DISPLAY_FLAGS_PIXDATA_NEGEDGE = BIT(7),
28 DISPLAY_FLAGS_INTERLACED = BIT(8),
29 DISPLAY_FLAGS_DOUBLESCAN = BIT(9),
30 DISPLAY_FLAGS_DOUBLECLK = BIT(10),
31 #if defined(CONFIG_FB_ROCKCHIP)
32 DISPLAY_FLAGS_SWAP_GB = BIT(16),
33 DISPLAY_FLAGS_SWAP_RG = BIT(17),
34 DISPLAY_FLAGS_SWAP_RB = BIT(18),
39 * A single signal can be specified via a range of minimal and maximal values
40 * with a typical value, that lies somewhere inbetween.
49 * Single "mode" entry. This describes one set of signal timings a display can
50 * have in one setting. This struct can later be converted to struct videomode
51 * (see include/video/videomode.h). As each timing_entry can be defined as a
52 * range, one struct display_timing may become multiple struct videomodes.
54 * Example: hsync active high, vsync active low
57 * Video ______________________XXXXXXXXXXXXXXXXXXXXXX_____________________
58 * |<- sync ->|<- back ->|<----- active ----->|<- front ->|<- sync..
59 * | | porch | | porch |
61 * HSync _|¯¯¯¯¯¯¯¯¯¯|___________________________________________|¯¯¯¯¯¯¯¯¯
63 * VSync ¯|__________|¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯|_________
65 struct display_timing {
66 struct timing_entry pixelclock;
68 struct timing_entry hactive; /* hor. active video */
69 struct timing_entry hfront_porch; /* hor. front porch */
70 struct timing_entry hback_porch; /* hor. back porch */
71 struct timing_entry hsync_len; /* hor. sync len */
73 struct timing_entry vactive; /* ver. active video */
74 struct timing_entry vfront_porch; /* ver. front porch */
75 struct timing_entry vback_porch; /* ver. back porch */
76 struct timing_entry vsync_len; /* ver. sync len */
78 enum display_flags flags; /* display flags */
79 #if defined(CONFIG_FB_ROCKCHIP)
80 u16 screen_type; /*screen type*/
81 u16 screen_widt; /* screen physical size */
83 u16 lvds_format; /*lvds data format for lvds screen*/
84 u16 face; /*display output interface format:24bit 18bit 16bit*/
85 u16 color_mode; /* input color mode: RGB or YUV */
93 * This describes all timing settings a display provides.
94 * The native_mode is the default setting for this display.
95 * Drivers that can handle multiple videomodes should work with this struct and
96 * convert each entry to the desired end result.
98 struct display_timings {
99 unsigned int num_timings;
100 unsigned int native_mode;
102 struct display_timing **timings;
105 /* get one entry from struct display_timings */
106 static inline struct display_timing *display_timings_get(const struct
107 display_timings *disp,
110 if (disp->num_timings > index)
111 return disp->timings[index];
116 void display_timings_release(struct display_timings *disp);