2 * Copyright 2006-2009 Red Hat, Inc.
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * on the rights to use, copy, modify, merge, publish, distribute, sub
8 * license, and/or sell copies of the Software, and to permit persons to whom
9 * the Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
19 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
20 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
22 /* Original Author: Adam Jackson <ajax@nwnk.net> */
23 /* Heavily modified by: Leif Middelschulte <leif.middelschulte@gmail.com> */
28 * - see other TODO's within this file.
31 #define ECORE_X_RANDR_EDID_VERSION_10 ((1 << 8) | 0)
32 #define ECORE_X_RANDR_EDID_VERSION_11 ((1 << 8) | 1)
33 #define ECORE_X_RANDR_EDID_VERSION_12 ((1 << 8) | 2)
34 #define ECORE_X_RANDR_EDID_VERSION_13 ((1 << 8) | 3)
35 #define ECORE_X_RANDR_EDID_VERSION_14 ((1 << 8) | 4)
37 #define _ECORE_X_RANDR_EDID_OFFSET_MANUFACTURER 0x08
38 #define _ECORE_X_RANDR_EDID_OFFSET_TYPE 0x14
39 #define _ECORE_X_RANDR_EDID_OFFSET_VERSION_MAJOR 0x12
40 #define _ECORE_X_RANDR_EDID_OFFSET_VERSION_MINOR 0x13
41 #define _ECORE_X_RANDR_EDID_OFFSET_DPMS 0x18
42 #define _ECORE_X_RANDR_EDID_OFFSET_COLORSPACE 0x18
43 #define _ECORE_X_RANDR_EDID_OFFSET_DESCRIPTOR_BLOCK 0x36
44 #define _ECORE_X_RANDR_EDID_OFFSET_DESCRIPTOR_BLOCK_TYPE 3
45 #define _ECORE_X_RANDR_EDID_OFFSET_DESCRIPTOR_BLOCK_CONTENT 5
46 #define _ECORE_X_RANDR_EDID_OFFSET_ASPECT_RATIO_PREFERRED 15
47 #define _ECORE_X_RANDR_EDID_OFFSET_ASPECT_RATIO 14
49 #define _ECORE_X_RANDR_EDID_MASK_DIGITAL 0x80
50 #define _ECORE_X_RANDR_EDID_MASK_DIGITAL_INTERFACE 0x0f
51 #define _ECORE_X_RANDR_EDID_MASK_DIGITAL_TMDS_DFP_10 0x01
52 #define _ECORE_X_RANDR_EDID_MASK_COLORSCHEME_ANALOGOUS 0x18
53 #define _ECORE_X_RANDR_EDID_MASK_COLORSCHEME_DIGITAL_YCRCB_444 0x10
54 #define _ECORE_X_RANDR_EDID_MASK_COLORSCHEME_DIGITAL_YCRCB_422 0x08
55 #define _ECORE_X_RANDR_EDID_MASK_ASPECT_RATIO_PREFERRED 0xe0
56 #define _ECORE_X_RANDR_EDID_MASK_DPMS 0xE0
57 #define _ECORE_X_RANDR_EDID_MASK_DPMS_STANDBY 0x80
58 #define _ECORE_X_RANDR_EDID_MASK_DPMS_SUSPEND 0x40
59 #define _ECORE_X_RANDR_EDID_MASK_DPMS_OFF 0x20
60 #define _ECORE_X_RANDR_EDID_MASK_INTERFACE_TYPE 0x0f
61 #define _ECORE_X_RANDR_EDID_MASK_ASPECT_RATIO_4_3 0x80
62 #define _ECORE_X_RANDR_EDID_MASK_ASPECT_RATIO_16_9 0x40
63 #define _ECORE_X_RANDR_EDID_MASK_ASPECT_RATIO_16_10 0x20
64 #define _ECORE_X_RANDR_EDID_MASK_ASPECT_RATIO_5_4 0x10
65 #define _ECORE_X_RANDR_EDID_MASK_ASPECT_RATIO_15_9 0x08
67 #define _ECORE_X_RANDR_EDID_DISPLAY_DESCRIPTOR_BLOCK_CONTENT_LENGTH_MAX 13
69 typedef enum _Ecore_X_Randr_Edid_Aspect_Ratio_Preferred {
70 ECORE_X_RANDR_EDID_ASPECT_RATIO_PREFERRED_4_3 = 0x00,
71 ECORE_X_RANDR_EDID_ASPECT_RATIO_PREFERRED_16_9 = 0x01,
72 ECORE_X_RANDR_EDID_ASPECT_RATIO_PREFERRED_16_10 = 0x02,
73 ECORE_X_RANDR_EDID_ASPECT_RATIO_PREFERRED_5_4 = 0x03,
74 ECORE_X_RANDR_EDID_ASPECT_RATIO_PREFERRED_15_9 = 0x04
75 } Ecore_X_Randr_Edid_Aspect_Ratio_Preferred;
77 /* Some convenience loops */
78 #define _ECORE_X_RANDR_EDID_FOR_EACH_EXTENSION_BLOCK(edid, edid_length, extension_block_iter) \
79 for (extension_block_iter = edid; extension_block_iter < (edid + edid_length); extension_block_iter += 128)
81 #define _ECORE_X_RANDR_EDID_FOR_EACH_CEA_BLOCK(edid, edid_length, cea_block_iter) \
82 _ECORE_X_RANDR_EDID_FOR_EACH_EXTENSION_BLOCK(edid, edid_length, cea_block_iter) \
83 if (cea_block_iter[0] == 0x02)
85 /* The following macro is to be used with caution as it inherits another loop.
86 * Therefore using a 'break;' statement will lead to continuation in the
87 * inherent 'Extension block'-loop.
89 #define _ECORE_X_RANDR_EDID_FOR_EACH_CEA_DETAILED_BLOCK(edid, edid_length, cea_block_iter, detailed_block_iter) \
90 _ECORE_X_RANDR_EDID_FOR_EACH_CEA_BLOCK(edid, edid_length, cea_block_iter) \
91 for (detailed_block_iter = cea_block_iter + cea_block_iter[2]; detailed_block_iter + 18 < cea_block_iter + 127; detailed_block_iter += 18) \
92 if (detailed_block_iter[0])
94 #define _ECORE_X_RANDR_EDID_FOR_EACH_DESCRIPTOR_BLOCK(edid, block) \
95 for (block = edid + _ECORE_X_RANDR_EDID_OFFSET_DESCRIPTOR_BLOCK; block <= (edid + _ECORE_X_RANDR_EDID_OFFSET_DESCRIPTOR_BLOCK + (3*18)); block += 18)
97 #define _ECORE_X_RANDR_EDID_FOR_EACH_NON_PIXEL_DESCRIPTOR_BLOCK(edid, block) \
98 _ECORE_X_RANDR_EDID_FOR_EACH_DESCRIPTOR_BLOCK(edid, block) \
99 if ((block[0] == 0) && (block[1] == 0))
102 ecore_x_randr_edid_has_valid_header(unsigned char *edid, unsigned long edid_length)
104 const unsigned char header[] =
105 { 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00 };
106 if (!edid) return EINA_FALSE;
107 if (edid_length < 8) return EINA_FALSE;
108 if (!memcmp(edid, header, 8)) return EINA_TRUE;
113 ecore_x_randr_edid_version_get(unsigned char *edid, unsigned long edid_length)
115 if ((edid_length > _ECORE_X_RANDR_EDID_OFFSET_VERSION_MINOR) &&
116 (ecore_x_randr_edid_has_valid_header(edid, edid_length)))
117 return ((edid[_ECORE_X_RANDR_EDID_OFFSET_VERSION_MAJOR] << 8) |
118 edid[_ECORE_X_RANDR_EDID_OFFSET_VERSION_MINOR]);
119 return ECORE_X_RANDR_EDID_UNKNOWN_VALUE;
123 ecore_x_randr_edid_manufacturer_model_get(unsigned char *edid, unsigned long edid_length)
125 if ((edid_length > 0x0b) &&
126 (ecore_x_randr_edid_has_valid_header(edid, edid_length)))
127 return (int)(edid[0x0a] + (edid[0x0b] << 8));
128 return ECORE_X_RANDR_EDID_UNKNOWN_VALUE;
132 ecore_x_randr_edid_manufacturer_serial_number_get(unsigned char *edid, unsigned long edid_length)
134 if ((edid_length > 0x0f) &&
135 (ecore_x_randr_edid_has_valid_header(edid, edid_length)))
136 return (int)(edid[0x0c] + (edid[0x0d] << 8) +
137 (edid[0x0e] << 16) + (edid[0x0f] << 24));
138 return ECORE_X_RANDR_EDID_UNKNOWN_VALUE;
142 ecore_x_randr_edid_manufacturer_name_get(unsigned char *edid, unsigned long edid_length)
144 if ((edid_length > (_ECORE_X_RANDR_EDID_OFFSET_MANUFACTURER + 1)) &&
145 (ecore_x_randr_edid_has_valid_header(edid, edid_length)))
150 x = (edid + _ECORE_X_RANDR_EDID_OFFSET_MANUFACTURER);
151 name = malloc(sizeof(char) * 4);
152 if (!name) return NULL;
153 name[0] = ((x[0] & 0x7c) >> 2) + '@';
154 name[1] = ((x[0] & 0x03) << 3) + ((x[1] & 0xe0) >> 5) + '@';
155 name[2] = (x[1] & 0x1f) + '@';
156 name[_ECORE_X_RANDR_EDID_OFFSET_DESCRIPTOR_BLOCK_TYPE] = 0;
163 ecore_x_randr_edid_display_name_get(unsigned char *edid, unsigned long edid_length)
165 unsigned char *block = NULL;
166 int version = ecore_x_randr_edid_version_get(edid, edid_length);
168 if (version < ECORE_X_RANDR_EDID_VERSION_13) return NULL;
169 _ECORE_X_RANDR_EDID_FOR_EACH_NON_PIXEL_DESCRIPTOR_BLOCK(edid, block)
171 if (block[_ECORE_X_RANDR_EDID_OFFSET_DESCRIPTOR_BLOCK_TYPE] == 0xfc)
174 const char *edid_name;
176 edid_name = (const char *)block + _ECORE_X_RANDR_EDID_OFFSET_DESCRIPTOR_BLOCK_CONTENT;
177 name = malloc(sizeof(char) * _ECORE_X_RANDR_EDID_DISPLAY_DESCRIPTOR_BLOCK_CONTENT_LENGTH_MAX);
178 if (!name) return NULL;
179 strncpy(name, edid_name, (_ECORE_X_RANDR_EDID_DISPLAY_DESCRIPTOR_BLOCK_CONTENT_LENGTH_MAX - 1));
180 name[_ECORE_X_RANDR_EDID_DISPLAY_DESCRIPTOR_BLOCK_CONTENT_LENGTH_MAX] = 0;
181 for (p = name; *p; p++)
183 if ((*p < ' ') || (*p > '~')) *p = 0;
191 EAPI Ecore_X_Randr_Edid_Aspect_Ratio
192 ecore_x_randr_edid_display_aspect_ratio_preferred_get(unsigned char *edid, unsigned long edid_length)
194 unsigned char *block = NULL;
195 int version = ecore_x_randr_edid_version_get(edid, edid_length);
197 if (version < ECORE_X_RANDR_EDID_VERSION_13) return ECORE_X_RANDR_EDID_UNKNOWN_VALUE;
198 _ECORE_X_RANDR_EDID_FOR_EACH_NON_PIXEL_DESCRIPTOR_BLOCK(edid, block)
200 if ((block[_ECORE_X_RANDR_EDID_OFFSET_DESCRIPTOR_BLOCK_TYPE] == 0xfd) &&
203 Ecore_X_Randr_Edid_Aspect_Ratio_Preferred preferred_ratio =
204 (Ecore_X_Randr_Edid_Aspect_Ratio_Preferred)
205 ((block[_ECORE_X_RANDR_EDID_OFFSET_ASPECT_RATIO_PREFERRED] &
206 _ECORE_X_RANDR_EDID_MASK_ASPECT_RATIO_PREFERRED) >> 5);
207 switch (preferred_ratio)
209 case ECORE_X_RANDR_EDID_ASPECT_RATIO_PREFERRED_4_3:
210 return ECORE_X_RANDR_EDID_ASPECT_RATIO_4_3;
211 case ECORE_X_RANDR_EDID_ASPECT_RATIO_PREFERRED_16_9:
212 return ECORE_X_RANDR_EDID_ASPECT_RATIO_16_9;
213 case ECORE_X_RANDR_EDID_ASPECT_RATIO_PREFERRED_16_10:
214 return ECORE_X_RANDR_EDID_ASPECT_RATIO_16_10;
215 case ECORE_X_RANDR_EDID_ASPECT_RATIO_PREFERRED_5_4:
216 return ECORE_X_RANDR_EDID_ASPECT_RATIO_5_4;
217 case ECORE_X_RANDR_EDID_ASPECT_RATIO_PREFERRED_15_9:
218 return ECORE_X_RANDR_EDID_ASPECT_RATIO_15_9;
220 return ECORE_X_RANDR_EDID_UNKNOWN_VALUE;
224 return ECORE_X_RANDR_EDID_UNKNOWN_VALUE;
227 EAPI Ecore_X_Randr_Edid_Aspect_Ratio
228 ecore_x_randr_edid_display_aspect_ratios_get(unsigned char *edid, unsigned long edid_length)
230 Ecore_X_Randr_Edid_Aspect_Ratio ret = ECORE_X_RANDR_EDID_UNKNOWN_VALUE;
231 unsigned char *block = NULL;
232 int version = ecore_x_randr_edid_version_get(edid, edid_length);
234 if (version < ECORE_X_RANDR_EDID_VERSION_13) return ECORE_X_RANDR_EDID_UNKNOWN_VALUE;
235 _ECORE_X_RANDR_EDID_FOR_EACH_NON_PIXEL_DESCRIPTOR_BLOCK(edid, block)
237 if ((block[_ECORE_X_RANDR_EDID_OFFSET_DESCRIPTOR_BLOCK_TYPE] == 0xfd) &&
240 if (block[_ECORE_X_RANDR_EDID_OFFSET_ASPECT_RATIO] & _ECORE_X_RANDR_EDID_MASK_ASPECT_RATIO_4_3)
241 ret |= ECORE_X_RANDR_EDID_ASPECT_RATIO_4_3;
242 if (block[_ECORE_X_RANDR_EDID_OFFSET_ASPECT_RATIO] & _ECORE_X_RANDR_EDID_MASK_ASPECT_RATIO_16_9)
243 ret |= ECORE_X_RANDR_EDID_ASPECT_RATIO_16_9;
244 if (block[_ECORE_X_RANDR_EDID_OFFSET_ASPECT_RATIO] & _ECORE_X_RANDR_EDID_MASK_ASPECT_RATIO_16_10)
245 ret |= ECORE_X_RANDR_EDID_ASPECT_RATIO_16_10;
246 if (block[_ECORE_X_RANDR_EDID_OFFSET_ASPECT_RATIO] & _ECORE_X_RANDR_EDID_MASK_ASPECT_RATIO_5_4)
247 ret |= ECORE_X_RANDR_EDID_ASPECT_RATIO_5_4;
248 if (block[_ECORE_X_RANDR_EDID_OFFSET_ASPECT_RATIO] & _ECORE_X_RANDR_EDID_MASK_ASPECT_RATIO_15_9)
249 ret |= ECORE_X_RANDR_EDID_ASPECT_RATIO_15_9;
256 ecore_x_randr_edid_display_ascii_get(unsigned char *edid, unsigned long edid_length)
258 unsigned char *block = NULL;
259 int version = ecore_x_randr_edid_version_get(edid, edid_length);
261 if (version < ECORE_X_RANDR_EDID_VERSION_13) return NULL;
262 _ECORE_X_RANDR_EDID_FOR_EACH_NON_PIXEL_DESCRIPTOR_BLOCK(edid, block)
264 if (block[_ECORE_X_RANDR_EDID_OFFSET_DESCRIPTOR_BLOCK_TYPE] == 0xfe)
267 const char *edid_ascii = (const char*)block +
268 _ECORE_X_RANDR_EDID_OFFSET_DESCRIPTOR_BLOCK_CONTENT;
270 * TODO: Two of these in a row, in the third and fourth slots,
271 * seems to be specified by SPWG: http://www.spwg.org/
273 ascii = malloc(sizeof(char) * _ECORE_X_RANDR_EDID_DISPLAY_DESCRIPTOR_BLOCK_CONTENT_LENGTH_MAX);
274 if (!ascii) return NULL;
275 strncpy(ascii, edid_ascii, (_ECORE_X_RANDR_EDID_DISPLAY_DESCRIPTOR_BLOCK_CONTENT_LENGTH_MAX - 1));
276 ascii[_ECORE_X_RANDR_EDID_DISPLAY_DESCRIPTOR_BLOCK_CONTENT_LENGTH_MAX] = 0;
277 for (p = ascii; *p; p++)
279 if ((*p < ' ') || (*p > '~')) *p = 0;
288 ecore_x_randr_edid_display_serial_get(unsigned char *edid, unsigned long edid_length)
290 unsigned char *block = NULL;
291 int version = ecore_x_randr_edid_version_get(edid, edid_length);
293 if (version < ECORE_X_RANDR_EDID_VERSION_13) return NULL;
294 _ECORE_X_RANDR_EDID_FOR_EACH_NON_PIXEL_DESCRIPTOR_BLOCK(edid, block)
296 if (block[_ECORE_X_RANDR_EDID_OFFSET_DESCRIPTOR_BLOCK_TYPE] == 0xff)
299 const char *edid_serial = (const char*)block +
300 _ECORE_X_RANDR_EDID_OFFSET_DESCRIPTOR_BLOCK_CONTENT;
302 * TODO: Two of these in a row, in the third and fourth slots,
303 * seems to be specified by SPWG: http://www.spwg.org/
305 serial = malloc(sizeof(char) * _ECORE_X_RANDR_EDID_DISPLAY_DESCRIPTOR_BLOCK_CONTENT_LENGTH_MAX);
306 if (!serial) return NULL;
307 strncpy(serial, edid_serial, (_ECORE_X_RANDR_EDID_DISPLAY_DESCRIPTOR_BLOCK_CONTENT_LENGTH_MAX - 1));
308 serial[_ECORE_X_RANDR_EDID_DISPLAY_DESCRIPTOR_BLOCK_CONTENT_LENGTH_MAX] = 0;
309 for (p = serial; *p; p++)
311 if ((*p < ' ') || (*p > '~')) *p = 0;
320 ecore_x_randr_edid_info_has_valid_checksum(unsigned char *edid, unsigned long edid_length)
322 unsigned char *cea_block_iter = NULL;
325 int version = ecore_x_randr_edid_version_get(edid, edid_length);
327 if (version < ECORE_X_RANDR_EDID_VERSION_13) return EINA_FALSE;
328 if (edid_length < 128) return EINA_FALSE;
330 /* Check the EDID block itself */
331 for (i = 0; i < 128; i++) sum += edid[i];
332 if (sum) return EINA_FALSE;
334 /* Check the cea extension blocks */
335 _ECORE_X_RANDR_EDID_FOR_EACH_CEA_BLOCK(edid, edid_length, cea_block_iter)
337 for (i = 0, sum = 0; i < 128; i++) sum += cea_block_iter[i];
339 if (sum) return EINA_FALSE;
344 ecore_x_randr_edid_dpms_available_get(unsigned char *edid, unsigned long edid_length)
346 int version = ecore_x_randr_edid_version_get(edid, edid_length);
348 if (version < ECORE_X_RANDR_EDID_VERSION_13) return EINA_FALSE;
349 return (!!(edid[_ECORE_X_RANDR_EDID_OFFSET_DPMS] &
350 _ECORE_X_RANDR_EDID_MASK_DPMS));
354 ecore_x_randr_edid_dpms_standby_available_get(unsigned char *edid, unsigned long edid_length)
356 int version = ecore_x_randr_edid_version_get(edid, edid_length);
358 if (version < ECORE_X_RANDR_EDID_VERSION_13) return EINA_FALSE;
359 if (edid[_ECORE_X_RANDR_EDID_OFFSET_DPMS] & _ECORE_X_RANDR_EDID_MASK_DPMS)
360 return (!!(edid[_ECORE_X_RANDR_EDID_OFFSET_DPMS] &
361 _ECORE_X_RANDR_EDID_MASK_DPMS_STANDBY));
366 ecore_x_randr_edid_dpms_suspend_available_get(unsigned char *edid, unsigned long edid_length)
368 int version = ecore_x_randr_edid_version_get(edid, edid_length);
370 if (version < ECORE_X_RANDR_EDID_VERSION_13) return EINA_FALSE;
371 if (edid[_ECORE_X_RANDR_EDID_OFFSET_DPMS] & _ECORE_X_RANDR_EDID_MASK_DPMS)
372 return (!!(edid[_ECORE_X_RANDR_EDID_OFFSET_DPMS] &
373 _ECORE_X_RANDR_EDID_MASK_DPMS_SUSPEND));
378 ecore_x_randr_edid_dpms_off_available_get(unsigned char *edid, unsigned long edid_length)
380 int version = ecore_x_randr_edid_version_get(edid, edid_length);
382 if (version < ECORE_X_RANDR_EDID_VERSION_13) return EINA_FALSE;
383 if (edid[_ECORE_X_RANDR_EDID_OFFSET_DPMS] & _ECORE_X_RANDR_EDID_MASK_DPMS)
384 return (!!(edid[_ECORE_X_RANDR_EDID_OFFSET_DPMS] &
385 _ECORE_X_RANDR_EDID_MASK_DPMS_OFF));
390 ecore_x_randr_edid_display_type_digital_get(unsigned char *edid, unsigned long edid_length)
392 int version = ecore_x_randr_edid_version_get(edid, edid_length);
394 if (version < ECORE_X_RANDR_EDID_VERSION_13) return EINA_FALSE;
395 return (!!(edid[_ECORE_X_RANDR_EDID_OFFSET_TYPE] &
396 _ECORE_X_RANDR_EDID_MASK_DIGITAL));
399 EAPI Ecore_X_Randr_Edid_Display_Colorscheme
400 ecore_x_randr_edid_display_colorscheme_get(unsigned char *edid, unsigned long edid_length)
402 Ecore_X_Randr_Edid_Display_Colorscheme colorscheme = ECORE_X_RANDR_EDID_UNKNOWN_VALUE;
403 int version = ecore_x_randr_edid_version_get(edid, edid_length);
405 if (version < ECORE_X_RANDR_EDID_VERSION_13) return colorscheme;
406 if (ecore_x_randr_edid_display_type_digital_get(edid, edid_length))
408 colorscheme = ECORE_X_RANDR_EDID_DISPLAY_COLORSCHEME_COLOR_RGB_4_4_4;
409 if (edid[_ECORE_X_RANDR_EDID_OFFSET_COLORSPACE] &
410 _ECORE_X_RANDR_EDID_MASK_COLORSCHEME_DIGITAL_YCRCB_444)
411 colorscheme |= ECORE_X_RANDR_EDID_DISPLAY_COLORSCHEME_COLOR_RGB_YCRCB_4_4_4;
412 if (edid[_ECORE_X_RANDR_EDID_OFFSET_COLORSPACE] &
413 _ECORE_X_RANDR_EDID_MASK_COLORSCHEME_DIGITAL_YCRCB_422)
414 colorscheme |= ECORE_X_RANDR_EDID_DISPLAY_COLORSCHEME_COLOR_RGB_YCRCB_4_2_2;
417 colorscheme = edid[_ECORE_X_RANDR_EDID_OFFSET_COLORSPACE] & _ECORE_X_RANDR_EDID_MASK_COLORSCHEME_ANALOGOUS;
421 EAPI Ecore_X_Randr_Edid_Display_Interface_Type
422 ecore_x_randr_edid_display_interface_type_get(unsigned char *edid, unsigned long edid_length)
424 Ecore_X_Randr_Edid_Display_Interface_Type type = ECORE_X_RANDR_EDID_UNKNOWN_VALUE;
425 int version = ecore_x_randr_edid_version_get(edid, edid_length);
427 if (version < ECORE_X_RANDR_EDID_VERSION_13) return type;
428 type = edid[_ECORE_X_RANDR_EDID_OFFSET_TYPE] &
429 _ECORE_X_RANDR_EDID_MASK_INTERFACE_TYPE;
430 if (type > ECORE_X_RANDR_EDID_DISPLAY_INTERFACE_DISPLAY_PORT)
431 type = ECORE_X_RANDR_EDID_UNKNOWN_VALUE;