Details | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 6082 | serge | 1 | /* |
| 2 | * Copyright 2012 Steffen Trumtrar |
||
| 3 | * |
||
| 4 | * description of display timings |
||
| 5 | * |
||
| 6 | * This file is released under the GPLv2 |
||
| 7 | */ |
||
| 8 | |||
| 9 | #ifndef __LINUX_DISPLAY_TIMING_H |
||
| 10 | #define __LINUX_DISPLAY_TIMING_H |
||
| 11 | |||
| 12 | #include |
||
| 13 | #include |
||
| 14 | |||
| 15 | enum display_flags { |
||
| 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), |
||
| 20 | |||
| 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 | }; |
||
| 32 | |||
| 33 | /* |
||
| 34 | * A single signal can be specified via a range of minimal and maximal values |
||
| 35 | * with a typical value, that lies somewhere inbetween. |
||
| 36 | */ |
||
| 37 | struct timing_entry { |
||
| 38 | u32 min; |
||
| 39 | u32 typ; |
||
| 40 | u32 max; |
||
| 41 | }; |
||
| 42 | |||
| 43 | /* |
||
| 44 | * Single "mode" entry. This describes one set of signal timings a display can |
||
| 45 | * have in one setting. This struct can later be converted to struct videomode |
||
| 46 | * (see include/video/videomode.h). As each timing_entry can be defined as a |
||
| 47 | * range, one struct display_timing may become multiple struct videomodes. |
||
| 48 | * |
||
| 49 | * Example: hsync active high, vsync active low |
||
| 50 | * |
||
| 51 | * Active Video |
||
| 52 | * Video ______________________XXXXXXXXXXXXXXXXXXXXXX_____________________ |
||
| 53 | * |<- sync ->|<- back ->|<----- active ----->|<- front ->|<- sync.. |
||
| 54 | * | | porch | | porch | |
||
| 55 | * |
||
| 56 | * HSync _|¯¯¯¯¯¯¯¯¯¯|___________________________________________|¯¯¯¯¯¯¯¯¯ |
||
| 57 | * |
||
| 58 | * VSync ¯|__________|¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯|_________ |
||
| 59 | */ |
||
| 60 | struct display_timing { |
||
| 61 | struct timing_entry pixelclock; |
||
| 62 | |||
| 63 | struct timing_entry hactive; /* hor. active video */ |
||
| 64 | struct timing_entry hfront_porch; /* hor. front porch */ |
||
| 65 | struct timing_entry hback_porch; /* hor. back porch */ |
||
| 66 | struct timing_entry hsync_len; /* hor. sync len */ |
||
| 67 | |||
| 68 | struct timing_entry vactive; /* ver. active video */ |
||
| 69 | struct timing_entry vfront_porch; /* ver. front porch */ |
||
| 70 | struct timing_entry vback_porch; /* ver. back porch */ |
||
| 71 | struct timing_entry vsync_len; /* ver. sync len */ |
||
| 72 | |||
| 73 | enum display_flags flags; /* display flags */ |
||
| 74 | }; |
||
| 75 | |||
| 76 | /* |
||
| 77 | * This describes all timing settings a display provides. |
||
| 78 | * The native_mode is the default setting for this display. |
||
| 79 | * Drivers that can handle multiple videomodes should work with this struct and |
||
| 80 | * convert each entry to the desired end result. |
||
| 81 | */ |
||
| 82 | struct display_timings { |
||
| 83 | unsigned int num_timings; |
||
| 84 | unsigned int native_mode; |
||
| 85 | |||
| 86 | struct display_timing **timings; |
||
| 87 | }; |
||
| 88 | |||
| 89 | /* get one entry from struct display_timings */ |
||
| 90 | static inline struct display_timing *display_timings_get(const struct |
||
| 91 | display_timings *disp, |
||
| 92 | unsigned int index) |
||
| 93 | { |
||
| 94 | if (disp->num_timings > index) |
||
| 95 | return disp->timings[index]; |
||
| 96 | else |
||
| 97 | return NULL; |
||
| 98 | } |
||
| 99 | |||
| 100 | void display_timings_release(struct display_timings *disp); |
||
| 101 | |||
| 102 | #endif |