172d277a7SGerd Hoffmann /*
272d277a7SGerd Hoffmann * QEMU EDID generator.
372d277a7SGerd Hoffmann *
472d277a7SGerd Hoffmann * This work is licensed under the terms of the GNU GPL, version 2 or later.
572d277a7SGerd Hoffmann * See the COPYING file in the top-level directory.
672d277a7SGerd Hoffmann */
772d277a7SGerd Hoffmann #include "qemu/osdep.h"
872d277a7SGerd Hoffmann #include "qemu/bswap.h"
972d277a7SGerd Hoffmann #include "hw/display/edid.h"
1072d277a7SGerd Hoffmann
1172d277a7SGerd Hoffmann static const struct edid_mode {
1272d277a7SGerd Hoffmann uint32_t xres;
1372d277a7SGerd Hoffmann uint32_t yres;
1472d277a7SGerd Hoffmann uint32_t byte;
1572d277a7SGerd Hoffmann uint32_t xtra3;
1672d277a7SGerd Hoffmann uint32_t bit;
1772d277a7SGerd Hoffmann uint32_t dta;
1872d277a7SGerd Hoffmann } modes[] = {
1972d277a7SGerd Hoffmann /* dea/dta extension timings (all @ 50 Hz) */
2072d277a7SGerd Hoffmann { .xres = 5120, .yres = 2160, .dta = 125 },
2172d277a7SGerd Hoffmann { .xres = 4096, .yres = 2160, .dta = 101 },
2272d277a7SGerd Hoffmann { .xres = 3840, .yres = 2160, .dta = 96 },
2372d277a7SGerd Hoffmann { .xres = 2560, .yres = 1080, .dta = 89 },
2472d277a7SGerd Hoffmann { .xres = 2048, .yres = 1152 },
2572d277a7SGerd Hoffmann { .xres = 1920, .yres = 1080, .dta = 31 },
2672d277a7SGerd Hoffmann
27f0602b70SSatyeshwar Singh /* dea/dta extension timings (all @ 60 Hz) */
28f0602b70SSatyeshwar Singh { .xres = 3840, .yres = 2160, .dta = 97 },
29f0602b70SSatyeshwar Singh
3072d277a7SGerd Hoffmann /* additional standard timings 3 (all @ 60Hz) */
3172d277a7SGerd Hoffmann { .xres = 1920, .yres = 1200, .xtra3 = 10, .bit = 0 },
3272d277a7SGerd Hoffmann { .xres = 1600, .yres = 1200, .xtra3 = 9, .bit = 2 },
3372d277a7SGerd Hoffmann { .xres = 1680, .yres = 1050, .xtra3 = 9, .bit = 5 },
3472d277a7SGerd Hoffmann { .xres = 1440, .yres = 900, .xtra3 = 8, .bit = 5 },
3572d277a7SGerd Hoffmann { .xres = 1280, .yres = 1024, .xtra3 = 7, .bit = 1 },
3672d277a7SGerd Hoffmann { .xres = 1280, .yres = 960, .xtra3 = 7, .bit = 3 },
3772d277a7SGerd Hoffmann { .xres = 1280, .yres = 768, .xtra3 = 7, .bit = 6 },
3872d277a7SGerd Hoffmann
3940c50307SGerd Hoffmann { .xres = 1920, .yres = 1440, .xtra3 = 11, .bit = 5 },
4040c50307SGerd Hoffmann { .xres = 1856, .yres = 1392, .xtra3 = 10, .bit = 3 },
4140c50307SGerd Hoffmann { .xres = 1792, .yres = 1344, .xtra3 = 10, .bit = 5 },
4240c50307SGerd Hoffmann { .xres = 1440, .yres = 1050, .xtra3 = 8, .bit = 1 },
4340c50307SGerd Hoffmann { .xres = 1360, .yres = 768, .xtra3 = 8, .bit = 7 },
4440c50307SGerd Hoffmann
4572d277a7SGerd Hoffmann /* established timings (all @ 60Hz) */
4672d277a7SGerd Hoffmann { .xres = 1024, .yres = 768, .byte = 36, .bit = 3 },
4772d277a7SGerd Hoffmann { .xres = 800, .yres = 600, .byte = 35, .bit = 0 },
4872d277a7SGerd Hoffmann { .xres = 640, .yres = 480, .byte = 35, .bit = 5 },
4972d277a7SGerd Hoffmann };
5072d277a7SGerd Hoffmann
51850dc61fSKonstantin Nazarov typedef struct Timings {
52850dc61fSKonstantin Nazarov uint32_t xfront;
53850dc61fSKonstantin Nazarov uint32_t xsync;
54850dc61fSKonstantin Nazarov uint32_t xblank;
55850dc61fSKonstantin Nazarov
56850dc61fSKonstantin Nazarov uint32_t yfront;
57850dc61fSKonstantin Nazarov uint32_t ysync;
58850dc61fSKonstantin Nazarov uint32_t yblank;
59850dc61fSKonstantin Nazarov
60850dc61fSKonstantin Nazarov uint64_t clock;
61850dc61fSKonstantin Nazarov } Timings;
62850dc61fSKonstantin Nazarov
generate_timings(Timings * timings,uint32_t refresh_rate,uint32_t xres,uint32_t yres)63850dc61fSKonstantin Nazarov static void generate_timings(Timings *timings, uint32_t refresh_rate,
64850dc61fSKonstantin Nazarov uint32_t xres, uint32_t yres)
65850dc61fSKonstantin Nazarov {
66850dc61fSKonstantin Nazarov /* pull some realistic looking timings out of thin air */
67850dc61fSKonstantin Nazarov timings->xfront = xres * 25 / 100;
68850dc61fSKonstantin Nazarov timings->xsync = xres * 3 / 100;
69850dc61fSKonstantin Nazarov timings->xblank = xres * 35 / 100;
70850dc61fSKonstantin Nazarov
71850dc61fSKonstantin Nazarov timings->yfront = yres * 5 / 1000;
72850dc61fSKonstantin Nazarov timings->ysync = yres * 5 / 1000;
73850dc61fSKonstantin Nazarov timings->yblank = yres * 35 / 1000;
74850dc61fSKonstantin Nazarov
75850dc61fSKonstantin Nazarov timings->clock = ((uint64_t)refresh_rate *
76850dc61fSKonstantin Nazarov (xres + timings->xblank) *
77850dc61fSKonstantin Nazarov (yres + timings->yblank)) / 10000000;
78850dc61fSKonstantin Nazarov }
79850dc61fSKonstantin Nazarov
edid_ext_dta(uint8_t * dta)8072d277a7SGerd Hoffmann static void edid_ext_dta(uint8_t *dta)
8172d277a7SGerd Hoffmann {
8272d277a7SGerd Hoffmann dta[0] = 0x02;
8372d277a7SGerd Hoffmann dta[1] = 0x03;
8472d277a7SGerd Hoffmann dta[2] = 0x05;
8572d277a7SGerd Hoffmann dta[3] = 0x00;
8672d277a7SGerd Hoffmann
8772d277a7SGerd Hoffmann /* video data block */
8872d277a7SGerd Hoffmann dta[4] = 0x40;
8972d277a7SGerd Hoffmann }
9072d277a7SGerd Hoffmann
edid_ext_dta_mode(uint8_t * dta,uint8_t nr)9172d277a7SGerd Hoffmann static void edid_ext_dta_mode(uint8_t *dta, uint8_t nr)
9272d277a7SGerd Hoffmann {
9372d277a7SGerd Hoffmann dta[dta[2]] = nr;
9472d277a7SGerd Hoffmann dta[2]++;
9572d277a7SGerd Hoffmann dta[4]++;
9672d277a7SGerd Hoffmann }
9772d277a7SGerd Hoffmann
edid_std_mode(uint8_t * mode,uint32_t xres,uint32_t yres)9872d277a7SGerd Hoffmann static int edid_std_mode(uint8_t *mode, uint32_t xres, uint32_t yres)
9972d277a7SGerd Hoffmann {
10072d277a7SGerd Hoffmann uint32_t aspect;
10172d277a7SGerd Hoffmann
10272d277a7SGerd Hoffmann if (xres == 0 || yres == 0) {
10372d277a7SGerd Hoffmann mode[0] = 0x01;
10472d277a7SGerd Hoffmann mode[1] = 0x01;
10572d277a7SGerd Hoffmann return 0;
10672d277a7SGerd Hoffmann
10772d277a7SGerd Hoffmann } else if (xres * 10 == yres * 16) {
10872d277a7SGerd Hoffmann aspect = 0;
10972d277a7SGerd Hoffmann } else if (xres * 3 == yres * 4) {
11072d277a7SGerd Hoffmann aspect = 1;
11172d277a7SGerd Hoffmann } else if (xres * 4 == yres * 5) {
11272d277a7SGerd Hoffmann aspect = 2;
11372d277a7SGerd Hoffmann } else if (xres * 9 == yres * 16) {
11472d277a7SGerd Hoffmann aspect = 3;
11572d277a7SGerd Hoffmann } else {
11672d277a7SGerd Hoffmann return -1;
11772d277a7SGerd Hoffmann }
11872d277a7SGerd Hoffmann
11972d277a7SGerd Hoffmann if ((xres / 8) - 31 > 255) {
12072d277a7SGerd Hoffmann return -1;
12172d277a7SGerd Hoffmann }
12272d277a7SGerd Hoffmann
12372d277a7SGerd Hoffmann mode[0] = (xres / 8) - 31;
12472d277a7SGerd Hoffmann mode[1] = ((aspect << 6) | (60 - 60));
12572d277a7SGerd Hoffmann return 0;
12672d277a7SGerd Hoffmann }
12772d277a7SGerd Hoffmann
edid_fill_modes(uint8_t * edid,uint8_t * xtra3,uint8_t * dta,uint32_t maxx,uint32_t maxy)12872d277a7SGerd Hoffmann static void edid_fill_modes(uint8_t *edid, uint8_t *xtra3, uint8_t *dta,
12972d277a7SGerd Hoffmann uint32_t maxx, uint32_t maxy)
13072d277a7SGerd Hoffmann {
13172d277a7SGerd Hoffmann const struct edid_mode *mode;
13272d277a7SGerd Hoffmann int std = 38;
13372d277a7SGerd Hoffmann int rc, i;
13472d277a7SGerd Hoffmann
13572d277a7SGerd Hoffmann for (i = 0; i < ARRAY_SIZE(modes); i++) {
13672d277a7SGerd Hoffmann mode = modes + i;
13772d277a7SGerd Hoffmann
13872d277a7SGerd Hoffmann if ((maxx && mode->xres > maxx) ||
13972d277a7SGerd Hoffmann (maxy && mode->yres > maxy)) {
14072d277a7SGerd Hoffmann continue;
14172d277a7SGerd Hoffmann }
14272d277a7SGerd Hoffmann
14372d277a7SGerd Hoffmann if (mode->byte) {
14472d277a7SGerd Hoffmann edid[mode->byte] |= (1 << mode->bit);
14572d277a7SGerd Hoffmann } else if (std < 54) {
14672d277a7SGerd Hoffmann rc = edid_std_mode(edid + std, mode->xres, mode->yres);
14772d277a7SGerd Hoffmann if (rc == 0) {
14872d277a7SGerd Hoffmann std += 2;
14972d277a7SGerd Hoffmann }
15040c50307SGerd Hoffmann } else if (mode->xtra3 && xtra3) {
15140c50307SGerd Hoffmann xtra3[mode->xtra3] |= (1 << mode->bit);
15272d277a7SGerd Hoffmann }
15372d277a7SGerd Hoffmann
15472d277a7SGerd Hoffmann if (dta && mode->dta) {
15572d277a7SGerd Hoffmann edid_ext_dta_mode(dta, mode->dta);
15672d277a7SGerd Hoffmann }
15772d277a7SGerd Hoffmann }
15872d277a7SGerd Hoffmann
15972d277a7SGerd Hoffmann while (std < 54) {
16072d277a7SGerd Hoffmann edid_std_mode(edid + std, 0, 0);
16172d277a7SGerd Hoffmann std += 2;
16272d277a7SGerd Hoffmann }
16372d277a7SGerd Hoffmann }
16472d277a7SGerd Hoffmann
edid_checksum(uint8_t * edid,size_t len)1655a4e88cfSKonstantin Nazarov static void edid_checksum(uint8_t *edid, size_t len)
16672d277a7SGerd Hoffmann {
16772d277a7SGerd Hoffmann uint32_t sum = 0;
16872d277a7SGerd Hoffmann int i;
16972d277a7SGerd Hoffmann
1705a4e88cfSKonstantin Nazarov for (i = 0; i < len; i++) {
17172d277a7SGerd Hoffmann sum += edid[i];
17272d277a7SGerd Hoffmann }
17372d277a7SGerd Hoffmann sum &= 0xff;
17472d277a7SGerd Hoffmann if (sum) {
1755a4e88cfSKonstantin Nazarov edid[len] = 0x100 - sum;
17672d277a7SGerd Hoffmann }
17772d277a7SGerd Hoffmann }
17872d277a7SGerd Hoffmann
edid_desc_next(uint8_t * edid,uint8_t * dta,uint8_t * desc)179ed7f17a6SGerd Hoffmann static uint8_t *edid_desc_next(uint8_t *edid, uint8_t *dta, uint8_t *desc)
180ed7f17a6SGerd Hoffmann {
181ed7f17a6SGerd Hoffmann if (desc == NULL) {
182ed7f17a6SGerd Hoffmann return NULL;
183ed7f17a6SGerd Hoffmann }
184ed7f17a6SGerd Hoffmann if (desc + 18 + 18 < edid + 127) {
185ed7f17a6SGerd Hoffmann return desc + 18;
186ed7f17a6SGerd Hoffmann }
1874f9e2686SGerd Hoffmann if (dta) {
1884f9e2686SGerd Hoffmann if (desc < edid + 127) {
1894f9e2686SGerd Hoffmann return dta + dta[2];
1904f9e2686SGerd Hoffmann }
1914f9e2686SGerd Hoffmann if (desc + 18 + 18 < dta + 127) {
1924f9e2686SGerd Hoffmann return desc + 18;
1934f9e2686SGerd Hoffmann }
1944f9e2686SGerd Hoffmann }
195ed7f17a6SGerd Hoffmann return NULL;
196ed7f17a6SGerd Hoffmann }
197ed7f17a6SGerd Hoffmann
edid_desc_type(uint8_t * desc,uint8_t type)19872d277a7SGerd Hoffmann static void edid_desc_type(uint8_t *desc, uint8_t type)
19972d277a7SGerd Hoffmann {
20072d277a7SGerd Hoffmann desc[0] = 0;
20172d277a7SGerd Hoffmann desc[1] = 0;
20272d277a7SGerd Hoffmann desc[2] = 0;
20372d277a7SGerd Hoffmann desc[3] = type;
20472d277a7SGerd Hoffmann desc[4] = 0;
20572d277a7SGerd Hoffmann }
20672d277a7SGerd Hoffmann
edid_desc_text(uint8_t * desc,uint8_t type,const char * text)20772d277a7SGerd Hoffmann static void edid_desc_text(uint8_t *desc, uint8_t type,
20872d277a7SGerd Hoffmann const char *text)
20972d277a7SGerd Hoffmann {
21072d277a7SGerd Hoffmann size_t len;
21172d277a7SGerd Hoffmann
21272d277a7SGerd Hoffmann edid_desc_type(desc, type);
21372d277a7SGerd Hoffmann memset(desc + 5, ' ', 13);
21472d277a7SGerd Hoffmann
21572d277a7SGerd Hoffmann len = strlen(text);
21672d277a7SGerd Hoffmann if (len > 12) {
21772d277a7SGerd Hoffmann len = 12;
21872d277a7SGerd Hoffmann }
219627c865dSMarc-André Lureau memcpy(desc + 5, text, len);
22072d277a7SGerd Hoffmann desc[5 + len] = '\n';
22172d277a7SGerd Hoffmann }
22272d277a7SGerd Hoffmann
edid_desc_ranges(uint8_t * desc)22372d277a7SGerd Hoffmann static void edid_desc_ranges(uint8_t *desc)
22472d277a7SGerd Hoffmann {
22572d277a7SGerd Hoffmann edid_desc_type(desc, 0xfd);
22672d277a7SGerd Hoffmann
22772d277a7SGerd Hoffmann /* vertical (50 -> 125 Hz) */
22872d277a7SGerd Hoffmann desc[5] = 50;
22972d277a7SGerd Hoffmann desc[6] = 125;
23072d277a7SGerd Hoffmann
23172d277a7SGerd Hoffmann /* horizontal (30 -> 160 kHz) */
23272d277a7SGerd Hoffmann desc[7] = 30;
23372d277a7SGerd Hoffmann desc[8] = 160;
23472d277a7SGerd Hoffmann
23535f171a2SKonstantin Nazarov /* max dot clock (2550 MHz) */
23635f171a2SKonstantin Nazarov desc[9] = 2550 / 10;
23772d277a7SGerd Hoffmann
23872d277a7SGerd Hoffmann /* no extended timing information */
23972d277a7SGerd Hoffmann desc[10] = 0x01;
24072d277a7SGerd Hoffmann
24172d277a7SGerd Hoffmann /* padding */
24272d277a7SGerd Hoffmann desc[11] = '\n';
24372d277a7SGerd Hoffmann memset(desc + 12, ' ', 6);
24472d277a7SGerd Hoffmann }
24572d277a7SGerd Hoffmann
24672d277a7SGerd Hoffmann /* additional standard timings 3 */
edid_desc_xtra3_std(uint8_t * desc)24772d277a7SGerd Hoffmann static void edid_desc_xtra3_std(uint8_t *desc)
24872d277a7SGerd Hoffmann {
24972d277a7SGerd Hoffmann edid_desc_type(desc, 0xf7);
25072d277a7SGerd Hoffmann desc[5] = 10;
25172d277a7SGerd Hoffmann }
25272d277a7SGerd Hoffmann
edid_desc_dummy(uint8_t * desc)25372d277a7SGerd Hoffmann static void edid_desc_dummy(uint8_t *desc)
25472d277a7SGerd Hoffmann {
25572d277a7SGerd Hoffmann edid_desc_type(desc, 0x10);
25672d277a7SGerd Hoffmann }
25772d277a7SGerd Hoffmann
edid_desc_timing(uint8_t * desc,const Timings * timings,uint32_t xres,uint32_t yres,uint32_t xmm,uint32_t ymm)258*4377683dSAkihiko Odaki static void edid_desc_timing(uint8_t *desc, const Timings *timings,
25972d277a7SGerd Hoffmann uint32_t xres, uint32_t yres,
260fd36eadeSMarc-André Lureau uint32_t xmm, uint32_t ymm)
26172d277a7SGerd Hoffmann {
262*4377683dSAkihiko Odaki stw_le_p(desc, timings->clock);
26372d277a7SGerd Hoffmann
26472d277a7SGerd Hoffmann desc[2] = xres & 0xff;
265*4377683dSAkihiko Odaki desc[3] = timings->xblank & 0xff;
26672d277a7SGerd Hoffmann desc[4] = (((xres & 0xf00) >> 4) |
267*4377683dSAkihiko Odaki ((timings->xblank & 0xf00) >> 8));
26872d277a7SGerd Hoffmann
26972d277a7SGerd Hoffmann desc[5] = yres & 0xff;
270*4377683dSAkihiko Odaki desc[6] = timings->yblank & 0xff;
27172d277a7SGerd Hoffmann desc[7] = (((yres & 0xf00) >> 4) |
272*4377683dSAkihiko Odaki ((timings->yblank & 0xf00) >> 8));
27372d277a7SGerd Hoffmann
274*4377683dSAkihiko Odaki desc[8] = timings->xfront & 0xff;
275*4377683dSAkihiko Odaki desc[9] = timings->xsync & 0xff;
27672d277a7SGerd Hoffmann
277*4377683dSAkihiko Odaki desc[10] = (((timings->yfront & 0x00f) << 4) |
278*4377683dSAkihiko Odaki ((timings->ysync & 0x00f) << 0));
279*4377683dSAkihiko Odaki desc[11] = (((timings->xfront & 0x300) >> 2) |
280*4377683dSAkihiko Odaki ((timings->xsync & 0x300) >> 4) |
281*4377683dSAkihiko Odaki ((timings->yfront & 0x030) >> 2) |
282*4377683dSAkihiko Odaki ((timings->ysync & 0x030) >> 4));
28372d277a7SGerd Hoffmann
28472d277a7SGerd Hoffmann desc[12] = xmm & 0xff;
28572d277a7SGerd Hoffmann desc[13] = ymm & 0xff;
28672d277a7SGerd Hoffmann desc[14] = (((xmm & 0xf00) >> 4) |
28772d277a7SGerd Hoffmann ((ymm & 0xf00) >> 8));
28872d277a7SGerd Hoffmann
28972d277a7SGerd Hoffmann desc[17] = 0x18;
29072d277a7SGerd Hoffmann }
29172d277a7SGerd Hoffmann
edid_to_10bit(float value)29272d277a7SGerd Hoffmann static uint32_t edid_to_10bit(float value)
29372d277a7SGerd Hoffmann {
29472d277a7SGerd Hoffmann return (uint32_t)(value * 1024 + 0.5);
29572d277a7SGerd Hoffmann }
29672d277a7SGerd Hoffmann
edid_colorspace(uint8_t * edid,float rx,float ry,float gx,float gy,float bx,float by,float wx,float wy)29772d277a7SGerd Hoffmann static void edid_colorspace(uint8_t *edid,
29872d277a7SGerd Hoffmann float rx, float ry,
29972d277a7SGerd Hoffmann float gx, float gy,
30072d277a7SGerd Hoffmann float bx, float by,
30172d277a7SGerd Hoffmann float wx, float wy)
30272d277a7SGerd Hoffmann {
30372d277a7SGerd Hoffmann uint32_t red_x = edid_to_10bit(rx);
30472d277a7SGerd Hoffmann uint32_t red_y = edid_to_10bit(ry);
30572d277a7SGerd Hoffmann uint32_t green_x = edid_to_10bit(gx);
30672d277a7SGerd Hoffmann uint32_t green_y = edid_to_10bit(gy);
30772d277a7SGerd Hoffmann uint32_t blue_x = edid_to_10bit(bx);
30872d277a7SGerd Hoffmann uint32_t blue_y = edid_to_10bit(by);
30972d277a7SGerd Hoffmann uint32_t white_x = edid_to_10bit(wx);
31072d277a7SGerd Hoffmann uint32_t white_y = edid_to_10bit(wy);
31172d277a7SGerd Hoffmann
31272d277a7SGerd Hoffmann edid[25] = (((red_x & 0x03) << 6) |
31372d277a7SGerd Hoffmann ((red_y & 0x03) << 4) |
31472d277a7SGerd Hoffmann ((green_x & 0x03) << 2) |
31572d277a7SGerd Hoffmann ((green_y & 0x03) << 0));
31672d277a7SGerd Hoffmann edid[26] = (((blue_x & 0x03) << 6) |
31772d277a7SGerd Hoffmann ((blue_y & 0x03) << 4) |
31872d277a7SGerd Hoffmann ((white_x & 0x03) << 2) |
31972d277a7SGerd Hoffmann ((white_y & 0x03) << 0));
32072d277a7SGerd Hoffmann edid[27] = red_x >> 2;
32172d277a7SGerd Hoffmann edid[28] = red_y >> 2;
32272d277a7SGerd Hoffmann edid[29] = green_x >> 2;
32372d277a7SGerd Hoffmann edid[30] = green_y >> 2;
32472d277a7SGerd Hoffmann edid[31] = blue_x >> 2;
32572d277a7SGerd Hoffmann edid[32] = blue_y >> 2;
32672d277a7SGerd Hoffmann edid[33] = white_x >> 2;
32772d277a7SGerd Hoffmann edid[34] = white_y >> 2;
32872d277a7SGerd Hoffmann }
32972d277a7SGerd Hoffmann
qemu_edid_dpi_from_mm(uint32_t mm,uint32_t res)330fd36eadeSMarc-André Lureau static uint32_t qemu_edid_dpi_from_mm(uint32_t mm, uint32_t res)
331fd36eadeSMarc-André Lureau {
332fd36eadeSMarc-André Lureau return res * 254 / 10 / mm;
333fd36eadeSMarc-André Lureau }
334fd36eadeSMarc-André Lureau
qemu_edid_dpi_to_mm(uint32_t dpi,uint32_t res)335fd36eadeSMarc-André Lureau uint32_t qemu_edid_dpi_to_mm(uint32_t dpi, uint32_t res)
336fd36eadeSMarc-André Lureau {
337fd36eadeSMarc-André Lureau return res * 254 / 10 / dpi;
338fd36eadeSMarc-André Lureau }
339fd36eadeSMarc-André Lureau
init_displayid(uint8_t * did)34035f171a2SKonstantin Nazarov static void init_displayid(uint8_t *did)
34135f171a2SKonstantin Nazarov {
34235f171a2SKonstantin Nazarov did[0] = 0x70; /* display id extension */
34335f171a2SKonstantin Nazarov did[1] = 0x13; /* version 1.3 */
34435f171a2SKonstantin Nazarov did[2] = 4; /* length */
34535f171a2SKonstantin Nazarov did[3] = 0x03; /* product type (0x03 == standalone display device) */
34635f171a2SKonstantin Nazarov edid_checksum(did + 1, did[2] + 4);
34735f171a2SKonstantin Nazarov }
34835f171a2SKonstantin Nazarov
qemu_displayid_generate(uint8_t * did,const Timings * timings,uint32_t xres,uint32_t yres,uint32_t xmm,uint32_t ymm)349*4377683dSAkihiko Odaki static void qemu_displayid_generate(uint8_t *did, const Timings *timings,
35035f171a2SKonstantin Nazarov uint32_t xres, uint32_t yres,
35135f171a2SKonstantin Nazarov uint32_t xmm, uint32_t ymm)
35235f171a2SKonstantin Nazarov {
35335f171a2SKonstantin Nazarov did[0] = 0x70; /* display id extension */
35435f171a2SKonstantin Nazarov did[1] = 0x13; /* version 1.3 */
35535f171a2SKonstantin Nazarov did[2] = 23; /* length */
35635f171a2SKonstantin Nazarov did[3] = 0x03; /* product type (0x03 == standalone display device) */
35735f171a2SKonstantin Nazarov
35835f171a2SKonstantin Nazarov did[5] = 0x03; /* Detailed Timings Data Block */
35935f171a2SKonstantin Nazarov did[6] = 0x00; /* revision */
36035f171a2SKonstantin Nazarov did[7] = 0x14; /* block length */
36135f171a2SKonstantin Nazarov
362*4377683dSAkihiko Odaki did[8] = timings->clock & 0xff;
363*4377683dSAkihiko Odaki did[9] = (timings->clock & 0xff00) >> 8;
364*4377683dSAkihiko Odaki did[10] = (timings->clock & 0xff0000) >> 16;
36535f171a2SKonstantin Nazarov
36635f171a2SKonstantin Nazarov did[11] = 0x88; /* leave aspect ratio undefined */
36735f171a2SKonstantin Nazarov
36835f171a2SKonstantin Nazarov stw_le_p(did + 12, 0xffff & (xres - 1));
369*4377683dSAkihiko Odaki stw_le_p(did + 14, 0xffff & (timings->xblank - 1));
370*4377683dSAkihiko Odaki stw_le_p(did + 16, 0xffff & (timings->xfront - 1));
371*4377683dSAkihiko Odaki stw_le_p(did + 18, 0xffff & (timings->xsync - 1));
37235f171a2SKonstantin Nazarov
37335f171a2SKonstantin Nazarov stw_le_p(did + 20, 0xffff & (yres - 1));
374*4377683dSAkihiko Odaki stw_le_p(did + 22, 0xffff & (timings->yblank - 1));
375*4377683dSAkihiko Odaki stw_le_p(did + 24, 0xffff & (timings->yfront - 1));
376*4377683dSAkihiko Odaki stw_le_p(did + 26, 0xffff & (timings->ysync - 1));
37735f171a2SKonstantin Nazarov
37835f171a2SKonstantin Nazarov edid_checksum(did + 1, did[2] + 4);
37935f171a2SKonstantin Nazarov }
38035f171a2SKonstantin Nazarov
qemu_edid_generate(uint8_t * edid,size_t size,qemu_edid_info * info)38172d277a7SGerd Hoffmann void qemu_edid_generate(uint8_t *edid, size_t size,
38272d277a7SGerd Hoffmann qemu_edid_info *info)
38372d277a7SGerd Hoffmann {
384*4377683dSAkihiko Odaki Timings timings;
385ed7f17a6SGerd Hoffmann uint8_t *desc = edid + 54;
38672d277a7SGerd Hoffmann uint8_t *xtra3 = NULL;
38772d277a7SGerd Hoffmann uint8_t *dta = NULL;
38835f171a2SKonstantin Nazarov uint8_t *did = NULL;
389fd36eadeSMarc-André Lureau uint32_t width_mm, height_mm;
390fce39fa7SAkihiko Odaki uint32_t refresh_rate = info->refresh_rate ? info->refresh_rate : 75000;
391fd36eadeSMarc-André Lureau uint32_t dpi = 100; /* if no width_mm/height_mm */
39235f171a2SKonstantin Nazarov uint32_t large_screen = 0;
39372d277a7SGerd Hoffmann
39472d277a7SGerd Hoffmann /* =============== set defaults =============== */
39572d277a7SGerd Hoffmann
39672d277a7SGerd Hoffmann if (!info->vendor || strlen(info->vendor) != 3) {
397edbc4b24SGerd Hoffmann info->vendor = "RHT";
39872d277a7SGerd Hoffmann }
39972d277a7SGerd Hoffmann if (!info->name) {
40072d277a7SGerd Hoffmann info->name = "QEMU Monitor";
40172d277a7SGerd Hoffmann }
40272d277a7SGerd Hoffmann if (!info->prefx) {
403de72c4b7SDaniel P. Berrangé info->prefx = 1280;
40472d277a7SGerd Hoffmann }
40572d277a7SGerd Hoffmann if (!info->prefy) {
406de72c4b7SDaniel P. Berrangé info->prefy = 800;
40772d277a7SGerd Hoffmann }
408fd36eadeSMarc-André Lureau if (info->width_mm && info->height_mm) {
409fd36eadeSMarc-André Lureau width_mm = info->width_mm;
410fd36eadeSMarc-André Lureau height_mm = info->height_mm;
411fd36eadeSMarc-André Lureau dpi = qemu_edid_dpi_from_mm(width_mm, info->prefx);
412fd36eadeSMarc-André Lureau } else {
413fd36eadeSMarc-André Lureau width_mm = qemu_edid_dpi_to_mm(dpi, info->prefx);
414fd36eadeSMarc-André Lureau height_mm = qemu_edid_dpi_to_mm(dpi, info->prefy);
415fd36eadeSMarc-André Lureau }
41672d277a7SGerd Hoffmann
417*4377683dSAkihiko Odaki generate_timings(&timings, refresh_rate, info->prefx, info->prefy);
418*4377683dSAkihiko Odaki if (info->prefx >= 4096 || info->prefy >= 4096 || timings.clock >= 65536) {
419*4377683dSAkihiko Odaki large_screen = 1;
420*4377683dSAkihiko Odaki }
421*4377683dSAkihiko Odaki
42272d277a7SGerd Hoffmann /* =============== extensions =============== */
42372d277a7SGerd Hoffmann
42472d277a7SGerd Hoffmann if (size >= 256) {
42572d277a7SGerd Hoffmann dta = edid + 128;
42672d277a7SGerd Hoffmann edid[126]++;
42772d277a7SGerd Hoffmann edid_ext_dta(dta);
42872d277a7SGerd Hoffmann }
42972d277a7SGerd Hoffmann
43035f171a2SKonstantin Nazarov if (size >= 384 && large_screen) {
43135f171a2SKonstantin Nazarov did = edid + 256;
43235f171a2SKonstantin Nazarov edid[126]++;
43335f171a2SKonstantin Nazarov init_displayid(did);
43435f171a2SKonstantin Nazarov }
43535f171a2SKonstantin Nazarov
43672d277a7SGerd Hoffmann /* =============== header information =============== */
43772d277a7SGerd Hoffmann
43872d277a7SGerd Hoffmann /* fixed */
43972d277a7SGerd Hoffmann edid[0] = 0x00;
44072d277a7SGerd Hoffmann edid[1] = 0xff;
44172d277a7SGerd Hoffmann edid[2] = 0xff;
44272d277a7SGerd Hoffmann edid[3] = 0xff;
44372d277a7SGerd Hoffmann edid[4] = 0xff;
44472d277a7SGerd Hoffmann edid[5] = 0xff;
44572d277a7SGerd Hoffmann edid[6] = 0xff;
44672d277a7SGerd Hoffmann edid[7] = 0x00;
44772d277a7SGerd Hoffmann
44872d277a7SGerd Hoffmann /* manufacturer id, product code, serial number */
44972d277a7SGerd Hoffmann uint16_t vendor_id = ((((info->vendor[0] - '@') & 0x1f) << 10) |
45072d277a7SGerd Hoffmann (((info->vendor[1] - '@') & 0x1f) << 5) |
45172d277a7SGerd Hoffmann (((info->vendor[2] - '@') & 0x1f) << 0));
45272d277a7SGerd Hoffmann uint16_t model_nr = 0x1234;
45372d277a7SGerd Hoffmann uint32_t serial_nr = info->serial ? atoi(info->serial) : 0;
4542e4a0b17SGerd Hoffmann stw_be_p(edid + 8, vendor_id);
4552e4a0b17SGerd Hoffmann stw_le_p(edid + 10, model_nr);
4562e4a0b17SGerd Hoffmann stl_le_p(edid + 12, serial_nr);
45772d277a7SGerd Hoffmann
45872d277a7SGerd Hoffmann /* manufacture week and year */
45972d277a7SGerd Hoffmann edid[16] = 42;
46072d277a7SGerd Hoffmann edid[17] = 2014 - 1990;
46172d277a7SGerd Hoffmann
46272d277a7SGerd Hoffmann /* edid version */
46372d277a7SGerd Hoffmann edid[18] = 1;
46472d277a7SGerd Hoffmann edid[19] = 4;
46572d277a7SGerd Hoffmann
46672d277a7SGerd Hoffmann
46772d277a7SGerd Hoffmann /* =============== basic display parameters =============== */
46872d277a7SGerd Hoffmann
46972d277a7SGerd Hoffmann /* video input: digital, 8bpc, displayport */
47072d277a7SGerd Hoffmann edid[20] = 0xa5;
47172d277a7SGerd Hoffmann
47272d277a7SGerd Hoffmann /* screen size: undefined */
473fd36eadeSMarc-André Lureau edid[21] = width_mm / 10;
474fd36eadeSMarc-André Lureau edid[22] = height_mm / 10;
47572d277a7SGerd Hoffmann
47672d277a7SGerd Hoffmann /* display gamma: 2.2 */
47772d277a7SGerd Hoffmann edid[23] = 220 - 100;
47872d277a7SGerd Hoffmann
47972d277a7SGerd Hoffmann /* supported features bitmap: std sRGB, preferred timing */
48072d277a7SGerd Hoffmann edid[24] = 0x06;
48172d277a7SGerd Hoffmann
48272d277a7SGerd Hoffmann
48372d277a7SGerd Hoffmann /* =============== chromaticity coordinates =============== */
48472d277a7SGerd Hoffmann
48572d277a7SGerd Hoffmann /* standard sRGB colorspace */
48672d277a7SGerd Hoffmann edid_colorspace(edid,
48772d277a7SGerd Hoffmann 0.6400, 0.3300, /* red */
48872d277a7SGerd Hoffmann 0.3000, 0.6000, /* green */
48972d277a7SGerd Hoffmann 0.1500, 0.0600, /* blue */
49072d277a7SGerd Hoffmann 0.3127, 0.3290); /* white point */
49172d277a7SGerd Hoffmann
49272d277a7SGerd Hoffmann /* =============== established timing bitmap =============== */
49372d277a7SGerd Hoffmann /* =============== standard timing information =============== */
49472d277a7SGerd Hoffmann
49572d277a7SGerd Hoffmann /* both filled by edid_fill_modes() */
49672d277a7SGerd Hoffmann
49772d277a7SGerd Hoffmann
49872d277a7SGerd Hoffmann /* =============== descriptor blocks =============== */
49972d277a7SGerd Hoffmann
50035f171a2SKonstantin Nazarov if (!large_screen) {
50135f171a2SKonstantin Nazarov /* The DTD section has only 12 bits to store the resolution */
502*4377683dSAkihiko Odaki edid_desc_timing(desc, &timings, info->prefx, info->prefy,
503fd36eadeSMarc-André Lureau width_mm, height_mm);
504ed7f17a6SGerd Hoffmann desc = edid_desc_next(edid, dta, desc);
50535f171a2SKonstantin Nazarov }
50672d277a7SGerd Hoffmann
507ec70aec8SGerd Hoffmann xtra3 = desc;
508ec70aec8SGerd Hoffmann edid_desc_xtra3_std(xtra3);
509ec70aec8SGerd Hoffmann desc = edid_desc_next(edid, dta, desc);
510ec70aec8SGerd Hoffmann edid_fill_modes(edid, xtra3, dta, info->maxx, info->maxy);
511ec70aec8SGerd Hoffmann /*
512ec70aec8SGerd Hoffmann * dta video data block is finished at thus point,
513ec70aec8SGerd Hoffmann * so dta descriptor offsets don't move any more.
514ec70aec8SGerd Hoffmann */
515ec70aec8SGerd Hoffmann
516ed7f17a6SGerd Hoffmann edid_desc_ranges(desc);
517ed7f17a6SGerd Hoffmann desc = edid_desc_next(edid, dta, desc);
51872d277a7SGerd Hoffmann
519ec70aec8SGerd Hoffmann if (desc && info->name) {
520ed7f17a6SGerd Hoffmann edid_desc_text(desc, 0xfc, info->name);
521ed7f17a6SGerd Hoffmann desc = edid_desc_next(edid, dta, desc);
52272d277a7SGerd Hoffmann }
52372d277a7SGerd Hoffmann
524ec70aec8SGerd Hoffmann if (desc && info->serial) {
525ed7f17a6SGerd Hoffmann edid_desc_text(desc, 0xff, info->serial);
526ed7f17a6SGerd Hoffmann desc = edid_desc_next(edid, dta, desc);
52772d277a7SGerd Hoffmann }
52872d277a7SGerd Hoffmann
529ed7f17a6SGerd Hoffmann while (desc) {
530ed7f17a6SGerd Hoffmann edid_desc_dummy(desc);
531ed7f17a6SGerd Hoffmann desc = edid_desc_next(edid, dta, desc);
53272d277a7SGerd Hoffmann }
53372d277a7SGerd Hoffmann
53435f171a2SKonstantin Nazarov /* =============== display id extensions =============== */
53535f171a2SKonstantin Nazarov
53635f171a2SKonstantin Nazarov if (did && large_screen) {
537*4377683dSAkihiko Odaki qemu_displayid_generate(did, &timings, info->prefx, info->prefy,
53835f171a2SKonstantin Nazarov width_mm, height_mm);
53935f171a2SKonstantin Nazarov }
54035f171a2SKonstantin Nazarov
54172d277a7SGerd Hoffmann /* =============== finish up =============== */
54272d277a7SGerd Hoffmann
5435a4e88cfSKonstantin Nazarov edid_checksum(edid, 127);
54472d277a7SGerd Hoffmann if (dta) {
5455a4e88cfSKonstantin Nazarov edid_checksum(dta, 127);
54672d277a7SGerd Hoffmann }
54735f171a2SKonstantin Nazarov if (did) {
54835f171a2SKonstantin Nazarov edid_checksum(did, 127);
54935f171a2SKonstantin Nazarov }
55072d277a7SGerd Hoffmann }
551e7992fc5SGerd Hoffmann
qemu_edid_size(uint8_t * edid)552e7992fc5SGerd Hoffmann size_t qemu_edid_size(uint8_t *edid)
553e7992fc5SGerd Hoffmann {
554e7992fc5SGerd Hoffmann uint32_t exts;
555e7992fc5SGerd Hoffmann
556e7992fc5SGerd Hoffmann if (edid[0] != 0x00 ||
557e7992fc5SGerd Hoffmann edid[1] != 0xff) {
558e7992fc5SGerd Hoffmann /* doesn't look like a valid edid block */
559e7992fc5SGerd Hoffmann return 0;
560e7992fc5SGerd Hoffmann }
561e7992fc5SGerd Hoffmann
562e7992fc5SGerd Hoffmann exts = edid[126];
563e7992fc5SGerd Hoffmann return 128 * (exts + 1);
564e7992fc5SGerd Hoffmann }
565