source: rtems/bsps/i386/pc386/include/edid.h @ c991eeec

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1/**
2 * @file
3 *
4 * @ingroup RTEMSBSPsI386
5 *
6 * @brief VESA EDID definitions.
7 *
8 * This file contains definitions for constants related to
9 * VESA Extended Display Identification Data.
10 *         More information can be found at
11 *     <http://www.vesa.org/vesa-standards/free-standards/>
12 *         VESA public standards may be found at
13 *     <http://www.vesa.org/wp-content/uploads/2010/12/thankspublic.htm>
14 */
15
16/*
17 * Copyright (C) 2014  Jan DoleÅŸal (dolezj21@fel.cvut.cz)
18 *                     CTU in Prague.
19 *
20 *  The license and distribution terms for this file may be
21 *  found in the file LICENSE in this distribution or at
22 *  http://www.rtems.org/license/LICENSE.
23 */
24
25#ifndef _EDID_H
26#define _EDID_H
27
28#ifndef ASM /* ASM */
29
30#include <stdint.h>
31
32#ifdef __cplusplus
33extern "C" {
34#endif /* __cplusplus */
35
36#include <rtems/score/basedefs.h>
37#define EDID_INLINE_ROUTINE     RTEMS_INLINE_ROUTINE
38
39/*  VESA Enhanced Extended Display Identification Data (E-EDID) Proposed
40    Release A, March 27, 2007 */
41
42/* *** Detailed Timing Descriptor Flags *** */
43#define EDID1_DTD_Flag_InterlacedOff            7
44#define EDID1_DTD_Flag_InterlacedMask           0x1
45#define EDID1_DTD_Flag_StereoModeOff            0
46#define EDID1_DTD_Flag_StereoModeMask           0xC1
47/* values for stereo flag */
48#define EDID1_DTD_Stereo_FldSeqRightOnSync      0x40
49#define EDID1_DTD_Stereo_FldSeqLeftOnSync       0x80
50#define EDID1_DTD_Stereo_2wItlvdRightOnEven     0x41
51#define EDID1_DTD_Stereo_2wItlvdLeftOnEven      0x81
52#define EDID1_DTD_Stereo_4wInterleaved          0xC0
53#define EDID1_DTD_Stereo_SideBySideItlvd        0xC1
54/* Analog = 0, Digital = 1 */
55#define EDID1_DTD_Flag_DigitalOff               4
56#define EDID1_DTD_Flag_DigitalMask              0x1
57/* Analog */
58#define EDID1_DTD_BipolarAnalogComposSyncOff    3
59#define EDID1_DTD_BipolarAnalogComposSyncMask   0x1
60#define EDID1_DTD_WithSerrationsOff             2
61#define EDID1_DTD_WithSerrationsMask            0x1
62/* Digital */
63#define EDID1_DTD_DigitalSeparateSyncOff        3
64#define EDID1_DTD_DigitalSeparateSyncMask       0x1
65    /* when DigitalSeparateSync == 0 -> it is composite
66       and WithSerrations defined up in Analog part applies */
67#define EDID1_DTD_VerticalSyncIsPositiveOff     2
68#define EDID1_DTD_VerticalSyncIsPositiveMask    0x1
69#define EDID1_DTD_HorizontalSyncIsPositiveOff   1
70#define EDID1_DTD_HorizontalSyncIsPositiveMask  0x1
71
72typedef struct {
73    uint8_t PixelClock_div10000[2];
74    uint8_t HorizontalActiveLow;
75    uint8_t HorizontalBlankingLow;
76    uint8_t HorizontalBlanking_ActiveHigh;
77    uint8_t VerticalActiveLow;
78    uint8_t VerticalBlankingLow;
79    uint8_t VerticalBlanking_ActiveHigh;
80    uint8_t HorizontalSyncOffsetLow;
81    uint8_t HorizontalSyncPulseWidthLow;
82    uint8_t VerticalSyncPulseWidth_OffsetLow;
83    uint8_t Vert_Hor_SyncPulseWidth_Offset_High;
84    uint8_t HorizontalImageSizeLow;
85    uint8_t VerticalImageSizeLow;
86    uint8_t Vertical_HorizontalImageSizeHigh;
87    uint8_t HorizontalBorder;
88    uint8_t VerticalBorder;
89    uint8_t Flags;
90} RTEMS_PACKED EDID_detailed_timing_descriptor;
91
92EDID_INLINE_ROUTINE uint16_t DTD_horizontal_active (
93    EDID_detailed_timing_descriptor *dtd)
94{
95    return (dtd->HorizontalActiveLow |
96        (dtd->HorizontalBlanking_ActiveHigh & 0xF0) << 4);
97}
98
99EDID_INLINE_ROUTINE uint16_t DTD_horizontal_blanking (
100    EDID_detailed_timing_descriptor *dtd)
101{
102    return (dtd->HorizontalBlankingLow |
103        (dtd->HorizontalBlanking_ActiveHigh & 0xF) << 8);
104}
105
106EDID_INLINE_ROUTINE uint16_t DTD_vertical_active (
107    EDID_detailed_timing_descriptor *dtd)
108{
109    return (dtd->VerticalActiveLow |
110        (dtd->VerticalBlanking_ActiveHigh & 0xF0) << 4);
111}
112
113EDID_INLINE_ROUTINE uint16_t DTD_vertical_blanking (
114    EDID_detailed_timing_descriptor *dtd)
115{
116    return (dtd->VerticalBlankingLow |
117        (dtd->VerticalBlanking_ActiveHigh & 0xF) << 8);
118}
119
120EDID_INLINE_ROUTINE uint16_t DTD_vertical_sync_pulse_width (
121    EDID_detailed_timing_descriptor *dtd)
122{
123    return ((dtd->VerticalSyncPulseWidth_OffsetLow & 0xF) |
124        (dtd->Vert_Hor_SyncPulseWidth_Offset_High & 0x3) << 4);
125}
126
127EDID_INLINE_ROUTINE uint16_t DTD_vertical_sync_offset (
128    EDID_detailed_timing_descriptor *dtd)
129{
130    return ((dtd->VerticalSyncPulseWidth_OffsetLow >> 4) |
131        (dtd->Vert_Hor_SyncPulseWidth_Offset_High & 0xC) << 2);
132}
133
134EDID_INLINE_ROUTINE uint16_t DTD_horizontal_sync_pulse_width (
135    EDID_detailed_timing_descriptor *dtd)
136{
137    return (dtd->HorizontalSyncPulseWidthLow |
138        (dtd->Vert_Hor_SyncPulseWidth_Offset_High & 0x30) << 4);
139}
140
141EDID_INLINE_ROUTINE uint16_t DTD_horizontal_sync_offset (
142    EDID_detailed_timing_descriptor *dtd)
143{
144    return (dtd->HorizontalSyncOffsetLow |
145        (dtd->Vert_Hor_SyncPulseWidth_Offset_High & 0xC0) << 2);
146}
147
148EDID_INLINE_ROUTINE uint16_t DTD_vertical_image_size (
149    EDID_detailed_timing_descriptor *dtd)
150{
151    return (dtd->VerticalImageSizeLow |
152        (dtd->Vertical_HorizontalImageSizeHigh & 0xF) << 8);
153}
154
155EDID_INLINE_ROUTINE uint16_t DTD_horizontal_image_size (
156    EDID_detailed_timing_descriptor *dtd)
157{
158    return (dtd->HorizontalImageSizeLow |
159        (dtd->Vertical_HorizontalImageSizeHigh & 0xF0) << 4);
160}
161
162typedef struct {
163    uint8_t ColorPointWhitePointIndexNumber;
164    uint8_t ColorPointWhiteLowBits;
165    uint8_t ColorPointWhite_x;
166    uint8_t ColorPointWhite_y;
167    uint8_t ColorPointWhiteGamma;
168} RTEMS_PACKED EDID_color_point_data;
169
170/* Basic Display Parameters */
171/* Monitor Descriptor - Data Type Tag */
172#define EDID_DTT_MonitorSerialNumber        0xFF
173
174#define EDID_DTT_ASCIIString                0xFE
175
176#define EDID_DTT_MonitorRangeLimits         0xFD
177typedef struct {
178    uint8_t MinVerticalRateInHz;
179    uint8_t MaxVerticalRateInHz;
180    uint8_t MinHorizontalInKHz;
181    uint8_t MaxHorizontalInKHz;
182    uint8_t MaxSupportedPixelClockIn10MHz;
183/* see  VESA, Generalized Timing Formula Standard - GTF
184        Version 1.0, December 18, 1996 */
185    uint8_t GTFStandard[8];
186} RTEMS_PACKED EDID_monitor_range_limits;
187
188#define EDID_DTT_MonitorName                0xFC
189
190#define EDID_DTT_AdditionalColorPointData   0xFB
191/* Standard Timing Identification */
192#define EDID_DTT_AdditionalSTI              0xFA
193
194#define EDID_DTT_DisplayColorManagement     0xF9
195
196#define EDID_DTT_CVT3ByteTimingCodes        0xF8
197
198#define EDID1_CVT_AspectRatioOff            2
199#define EDID1_CVT_AspectRatioMask           0x3
200#define EDID1_CVT_AddressableLinesHighOff   4
201#define EDID1_CVT_AddressableLinesHighMask  0xF
202    /* next 5 bits indicate supported vertical rates */
203#define EDID1_CVT_VerticalRate60HzRBOff     0
204#define EDID1_CVT_VerticalRate60HzRBMask    0x1
205#define EDID1_CVT_VerticalRate85HzOff       1
206#define EDID1_CVT_VerticalRate85HzMask      0x1
207#define EDID1_CVT_VerticalRate75HzOff       2
208#define EDID1_CVT_VerticalRate75HzMask      0x1
209#define EDID1_CVT_VerticalRate60HzOff       3
210#define EDID1_CVT_VerticalRate60HzMask      0x1
211#define EDID1_CVT_VerticalRate50HzOff       4
212#define EDID1_CVT_VerticalRate50HzMask      0x1
213#define EDID1_CVT_PreferredVerticalRateOff  5
214#define EDID1_CVT_PreferredVerticalRateMask 0x3
215
216#define EDID_CVT_AspectRatio_4_3            0
217#define EDID_CVT_AspectRatio_16_9           1
218#define EDID_CVT_AspectRatio_16_10          2
219#define EDID_CVT_AspectRatio_15_9           3
220#define EDID_CVT_PrefVertRate50Hz           0
221#define EDID_CVT_PrefVertRate60Hz           1
222#define EDID_CVT_PrefVertRate75Hz           2
223#define EDID_CVT_PrefVertRate85Hz           3
224typedef struct {
225    uint8_t AddressableLinesLow;
226    uint8_t AspectRatio_AddressableLinesHigh;
227    uint8_t VerticalRate_PreferredVerticalRate;
228} RTEMS_PACKED EDID_CVT_3_byte_code_descriptor;
229typedef struct {
230    uint8_t VersionNumber;
231    EDID_CVT_3_byte_code_descriptor cvt[4];
232} RTEMS_PACKED EDID_CVT_timing_codes_3B;
233
234EDID_INLINE_ROUTINE uint16_t edid1_CVT_addressable_lines_high (
235    EDID_CVT_3_byte_code_descriptor *cvt)
236{
237    return (cvt->AddressableLinesLow |
238        (cvt->VerticalRate_PreferredVerticalRate &
239         (EDID1_CVT_AddressableLinesHighMask<<EDID1_CVT_AddressableLinesHighOff)
240        ) << (8-EDID1_CVT_AddressableLinesHighOff) );
241}
242
243EDID_INLINE_ROUTINE uint8_t edid1_CVT_aspect_ratio (
244    EDID_CVT_3_byte_code_descriptor *cvt)
245{
246    return (cvt->AspectRatio_AddressableLinesHigh >> EDID1_CVT_AspectRatioOff) &
247        EDID1_CVT_AspectRatioMask;
248}
249
250#define EDID_DTT_EstablishedTimingsIII      0xF7
251typedef struct {
252    uint8_t RevisionNumber;
253    uint8_t EST_III[12];
254} RTEMS_PACKED EDID_established_timings_III;
255enum EST_III {
256    EST_1152x864_75Hz   = 0,
257    EST_1024x768_85Hz   = 1,
258    EST_800x600_85Hz    = 2,
259    EST_848x480_60Hz    = 3,
260    EST_640x480_85Hz    = 4,
261    EST_720x400_85Hz    = 5,
262    EST_640x400_85Hz    = 6,
263    EST_640x350_85Hz    = 7,
264
265    EST_1280x1024_85Hz  = 8,
266    EST_1280x1024_60Hz  = 9,
267    EST_1280x960_85Hz   = 10,
268    EST_1280x960_60Hz   = 11,
269    EST_1280x768_85Hz   = 12,
270    EST_1280x768_75Hz   = 13,
271    EST_1280x768_60Hz   = 14,
272    EST_1280x768_60HzRB = 15,
273
274    EST_1400x1050_75Hz  = 16,
275    EST_1400x1050_60Hz  = 17,
276    EST_1400x1050_60HzRB= 18,
277    EST_1400x900_85Hz   = 19,
278    EST_1400x900_75Hz   = 20,
279    EST_1400x900_60Hz   = 21,
280    EST_1400x900_60HzRB = 22,
281    EST_1360x768_60Hz   = 23,
282
283    EST_1600x1200_70Hz  = 24,
284    EST_1600x1200_65Hz  = 25,
285    EST_1600x1200_60Hz  = 26,
286    EST_1680x1050_85Hz  = 27,
287    EST_1680x1050_75Hz  = 28,
288    EST_1680x1050_60Hz  = 29,
289    EST_1680x1050_60HzRB= 30,
290    EST_1400x1050_85Hz  = 31,
291
292    EST_1920x1200_60Hz  = 32,
293    EST_1920x1200_60HzRB= 33,
294    EST_1856x1392_75Hz  = 34,
295    EST_1856x1392_60Hz  = 35,
296    EST_1792x1344_75Hz  = 36,
297    EST_1792x1344_60Hz  = 37,
298    EST_1600x1200_85Hz  = 38,
299    EST_1600x1200_75Hz  = 39,
300
301    EST_1920x1440_75Hz  = 44,
302    EST_1920x1440_60Hz  = 45,
303    EST_1920x1200_85Hz  = 46,
304    EST_1920x1200_75Hz  = 47,
305};
306
307#define EDID_DTT_DescriptorSpaceUnused      0x10
308/* DTT 0x0 - 0xF are manufacturer specific */
309
310typedef struct {
311    uint8_t Flag0[2];
312    uint8_t Flag1;
313    uint8_t DataTypeTag;
314    uint8_t Flag2;
315    uint8_t DescriptorData[13];
316} RTEMS_PACKED EDID_monitor_descriptor;
317
318union EDID_DTD_MD {
319    EDID_detailed_timing_descriptor dtd;
320    EDID_monitor_descriptor md;
321} RTEMS_PACKED;
322
323#define EDID1_STI_ImageAspectRatioOff           0
324#define EDID1_STI_ImageAspectRatioMask          0x3
325#define EDID1_STI_RefreshRateOff                2
326#define EDID1_STI_RefreshRateMask               0x3F
327
328#define EDID_STI_DescriptorUnused           0x0101
329#define EDID_STI_AspectRatio_16_10          0
330#define EDID_STI_AspectRatio_4_3            1
331#define EDID_STI_AspectRatio_5_4            2
332#define EDID_STI_AspectRatio_16_9           3
333typedef struct {
334    uint8_t HorizontalActivePixels;
335    uint8_t ImageAspectRatio_RefreshRate;
336} RTEMS_PACKED EDID_standard_timing_identification;
337
338/* Video Input Definition */
339/* Analog = 0, Digital = 1 */
340#define EDID1_VID_DigitalSignalLevelOff         7
341#define EDID1_VID_DigitalSignalLevelMask        0x1
342/* for EDID1_VID_DigitalSignalLevelOff = 1 (Digital) */
343#define EDID1_VID_ColorBitDepthOff              4
344#define EDID1_VID_ColorBitDepthMask             0x7 /* see CBD */
345#define EDID1_VID_DigitalVideoStandardSuppOff   0
346#define EDID1_VID_DigitalVideoStandardSuppMask  0xF /* see DVS */
347/* for EDID1_VID_DigitalSignalLevelOff = 0 (Analog) */
348#define EDID1_VID_SignalLevelStandardOff        5
349#define EDID1_VID_SignalLevelStandardMask       0x3
350#define EDID1_VID_VideoSetupBlankOff            4
351#define EDID1_VID_VideoSetupBlankMask           0x1
352#define EDID1_VID_SeparateSyncHandVSignalsOff   3
353#define EDID1_VID_SeparateSyncHandVSignalsMask  0x1
354#define EDID1_VID_SyncSignalOnHorizontalOff     2
355#define EDID1_VID_SyncSignalOnHorizontalMask    0x1
356#define EDID1_VID_SyncSignalOnGreenOff          1
357#define EDID1_VID_SyncSignalOnGreenMask         0x1
358#define EDID1_VID_SerationOnVerticalSyncOff     0
359#define EDID1_VID_SerationOnVerticalSyncMask    0x1
360/* Analog Interface Data Format - Signal Level Standard */
361#define EDID_SLS_0700_0300_1000Vpp             0x0
362#define EDID_SLS_0714_0286_1000Vpp             0x1
363#define EDID_SLS_1000_0400_1400Vpp             0x2
364#define EDID_SLS_0700_0000_0700Vpp             0x3
365
366/* Color Bit Depths */
367#define CBD_undef               0x0
368#define CBD_6bPerPrimaryColor   0x1
369#define CBD_8bPerPrimaryColor   0x2
370#define CBD_10bPerPrimaryColor  0x3
371#define CBD_12bPerPrimaryColor  0x4
372#define CBD_14bPerPrimaryColor  0x5
373#define CBD_16bPerPrimaryColor  0x6
374#define CBD_reserved            0x7
375
376/* Digital Video Standard Supported */
377#define DVS_undef               0x0
378#define DVS_DVI                 0x1
379#define DVS_HDMI_a              0x2
380#define DVS_HDMI_b              0x3
381#define DVS_MDDI                0x4
382#define DVS_DiplayPort          0x5
383
384/* Feature Support */
385#define EDID1_Feature_GTFSupported_mask              0x1
386#define EDID1_Feature_GTFSupported_off               0
387#define EDID1_Feature_PreferredTimingMode_mask       0x1
388#define EDID1_Feature_PreferredTimingMode_off        1
389#define EDID1_Feature_StandardDefaultColorSpace_mask 0x1
390#define EDID1_Feature_StandardDefaultColorSpace_off  2
391#define EDID1_Feature_DisplayType_mask               0x2
392#define EDID1_Feature_DisplayType_off                3
393        /* Refer to VESA DPMS Specification */
394#define EDID1_Feature_ActiveOff_mask                 0x1
395#define EDID1_Feature_ActiveOff_off                  5
396#define EDID1_Feature_Suspend_mask                   0x1
397#define EDID1_Feature_Suspend_off                    6
398#define EDID1_Feature_StandBy_mask                   0x1
399#define EDID1_Feature_StandBy_off                    7
400    /* analog - Display Color Type */
401#define EDID_DisplayType_Monochrome                 0
402#define EDID_DisplayType_RGBcolor                   1
403#define EDID_DisplayType_nonRGBcolor                2
404#define EDID_DisplayType_undef                      3
405    /* digital - Supported Color Encoding Formats */
406#define EDID_DisplayType_RGB444                     0
407#define EDID_DisplayType_RGB444YCrCb444             1
408#define EDID_DisplayType_RGB444YCrCb422             2
409#define EDID_DisplayType_RGB444YCrCb444YCrCb422     3
410
411typedef struct {
412    uint8_t Header[8];
413/*  Vendor Product Identification */
414    uint8_t IDManufacturerName[2];
415    uint8_t IDProductCode[2];
416    uint8_t IDSerialNumber[4];
417    uint8_t WeekofManufacture;
418    uint8_t YearofManufacture;
419/*  EDID Structure Version Revision Level */
420    uint8_t Version;
421    uint8_t Revision;
422/*  Basic Display Parameters Features */
423    /* Video Input Definition */
424    uint8_t VideoInputDefinition;
425    uint8_t MaxHorizontalImageSize;
426    uint8_t MaxVerticalImageSize;
427    uint8_t DisplayTransferCharacteristic;
428    /* Feature Support */
429    uint8_t Features;
430/*  Color Characteristics */
431    uint8_t GreenRedLow;
432    uint8_t WhiteBlueLow;
433    uint8_t RedXHigh;
434    uint8_t RedYHigh;
435    uint8_t GreenXHigh;
436    uint8_t GreenYHigh;
437    uint8_t BlueXHigh;
438    uint8_t BlueYHigh;
439    uint8_t WhiteXHigh;
440    uint8_t WhiteYHigh;
441/*  Established Timings I, II, Manufacturer's */
442    uint8_t EST_I_II_Man[3];
443/*  Standard Timing Identification */
444    EDID_standard_timing_identification STI[8];
445/*  Detailed Timing Descriptions / Monitor Descriptions */
446    union EDID_DTD_MD dtd_md[4];
447    uint8_t ExtensionFlag;
448    uint8_t Checksum;
449} RTEMS_PACKED EDID_edid1;
450
451EDID_INLINE_ROUTINE uint16_t edid1_RedX (EDID_edid1 *edid) {
452    return (edid->RedXHigh<<2) | (edid->GreenRedLow>>6);
453}
454EDID_INLINE_ROUTINE uint16_t edid1_RedY (EDID_edid1 *edid) {
455    return (edid->RedYHigh<<2) | (edid->GreenRedLow>>4)&&0x3;
456}
457EDID_INLINE_ROUTINE uint16_t edid1_GreenX (EDID_edid1 *edid) {
458    return (edid->GreenXHigh<<2) | (edid->GreenRedLow>>2)&&0x3;
459}
460EDID_INLINE_ROUTINE uint16_t edid1_GreenY (EDID_edid1 *edid) {
461    return (edid->GreenYHigh<<2) | (edid->GreenRedLow&0x3);
462}
463EDID_INLINE_ROUTINE uint16_t edid1_BlueX (EDID_edid1 *edid) {
464    return (edid->BlueXHigh<<2)  | (edid->WhiteBlueLow>>6);
465}
466EDID_INLINE_ROUTINE uint16_t edid1_BlueY (EDID_edid1 *edid) {
467    return (edid->BlueYHigh<<2)  | (edid->WhiteBlueLow>>4)&&0x3;
468}
469EDID_INLINE_ROUTINE uint16_t edid1_WhiteX (EDID_edid1 *edid) {
470    return (edid->WhiteXHigh<<2) | (edid->WhiteBlueLow>>2)&&0x3;
471}
472EDID_INLINE_ROUTINE uint16_t edid1_WhiteY (EDID_edid1 *edid) {
473    return (edid->WhiteYHigh<<2) | (edid->WhiteBlueLow&0x3);
474}
475
476EDID_INLINE_ROUTINE int edid1_STI_is_unused (
477      const EDID_standard_timing_identification *edid_sti) {
478    return (edid_sti->HorizontalActivePixels ==
479                  (uint8_t)EDID_STI_DescriptorUnused) &&
480           (edid_sti->ImageAspectRatio_RefreshRate ==
481                  (uint8_t)(EDID_STI_DescriptorUnused >> 8));
482}
483
484enum edid1_established_timings {
485/*  Established Timings I */
486    EST_800x600_60Hz    = 0,
487    EST_800x600_56Hz    = 1,
488    EST_640x480_75Hz    = 2,
489    EST_640x480_72Hz    = 3,
490    EST_640x480_67Hz    = 4,
491    EST_640x480_60Hz    = 5,
492    EST_720x400_88Hz    = 6,
493    EST_720x400_70Hz    = 7,
494/*  Established Timings II */
495    EST_1280x1024_75Hz  = 8,
496    EST_1024x768_75Hz   = 9,
497    EST_1024x768_70Hz   = 10,
498    EST_1024x768_60Hz   = 11,
499    EST_1024x768_87Hz   = 12,
500    EST_832x624_75Hz    = 13,
501    EST_800x600_75Hz    = 14,
502    EST_800x600_72Hz    = 15,
503/*  Manufacturer's Timings */
504    EST_1152x870_75Hz   = 23,
505};
506
507EDID_INLINE_ROUTINE uint8_t edid1_established_tim (
508    EDID_edid1 *edid,
509    enum edid1_established_timings est)
510{
511    return (uint8_t)(edid->EST_I_II_Man[est/8] & (est%8));
512}
513
514#ifdef __cplusplus
515}
516#endif /* __cplusplus */
517
518#endif /* ASM */
519
520#endif /* _VBE_H */
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