1 /*
2  * Copyright 2005-2006 Erik Waling
3  * Copyright 2006 Stephane Marchesin
4  * Copyright 2007-2009 Stuart Bennett
5  *
6  * Permission is hereby granted, free of charge, to any person obtaining a
7  * copy of this software and associated documentation files (the "Software"),
8  * to deal in the Software without restriction, including without limitation
9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10  * and/or sell copies of the Software, and to permit persons to whom the
11  * Software is furnished to do so, subject to the following conditions:
12  *
13  * The above copyright notice and this permission notice shall be included in
14  * all copies or substantial portions of the Software.
15  *
16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
19  * THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
20  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
21  * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
22  * SOFTWARE.
23  */
24 
25 #include "nouveau_drv.h"
26 #include "nouveau_reg.h"
27 #include "dispnv04/hw.h"
28 #include "nouveau_encoder.h"
29 
30 #include <linux/io-mapping.h>
31 #include <linux/firmware.h>
32 
33 /* these defines are made up */
34 #define NV_CIO_CRE_44_HEADA 0x0
35 #define NV_CIO_CRE_44_HEADB 0x3
36 #define FEATURE_MOBILE 0x10	/* also FEATURE_QUADRO for BMP */
37 
38 #define EDID1_LEN 128
39 
40 #define BIOSLOG(sip, fmt, arg...) NV_DEBUG(sip->dev, fmt, ##arg)
41 #define LOG_OLD_VALUE(x)
42 
43 struct init_exec {
44 	bool execute;
45 	bool repeat;
46 };
47 
48 static bool nv_cksum(const uint8_t *data, unsigned int length)
49 {
50 	/*
51 	 * There's a few checksums in the BIOS, so here's a generic checking
52 	 * function.
53 	 */
54 	int i;
55 	uint8_t sum = 0;
56 
57 	for (i = 0; i < length; i++)
58 		sum += data[i];
59 
60 	if (sum)
61 		return true;
62 
63 	return false;
64 }
65 
66 static uint16_t clkcmptable(struct nvbios *bios, uint16_t clktable, int pxclk)
67 {
68 	int compare_record_len, i = 0;
69 	uint16_t compareclk, scriptptr = 0;
70 
71 	if (bios->major_version < 5) /* pre BIT */
72 		compare_record_len = 3;
73 	else
74 		compare_record_len = 4;
75 
76 	do {
77 		compareclk = ROM16(bios->data[clktable + compare_record_len * i]);
78 		if (pxclk >= compareclk * 10) {
79 			if (bios->major_version < 5) {
80 				uint8_t tmdssub = bios->data[clktable + 2 + compare_record_len * i];
81 				scriptptr = ROM16(bios->data[bios->init_script_tbls_ptr + tmdssub * 2]);
82 			} else
83 				scriptptr = ROM16(bios->data[clktable + 2 + compare_record_len * i]);
84 			break;
85 		}
86 		i++;
87 	} while (compareclk);
88 
89 	return scriptptr;
90 }
91 
92 static void
93 run_digital_op_script(struct drm_device *dev, uint16_t scriptptr,
94 		      struct dcb_output *dcbent, int head, bool dl)
95 {
96 	struct nouveau_drm *drm = nouveau_drm(dev);
97 
98 	NV_INFO(drm, "0x%04X: Parsing digital output script table\n",
99 		 scriptptr);
100 	NVWriteVgaCrtc(dev, 0, NV_CIO_CRE_44, head ? NV_CIO_CRE_44_HEADB :
101 					         NV_CIO_CRE_44_HEADA);
102 	nouveau_bios_run_init_table(dev, scriptptr, dcbent, head);
103 
104 	nv04_dfp_bind_head(dev, dcbent, head, dl);
105 }
106 
107 static int call_lvds_manufacturer_script(struct drm_device *dev, struct dcb_output *dcbent, int head, enum LVDS_script script)
108 {
109 	struct nouveau_drm *drm = nouveau_drm(dev);
110 	struct nvbios *bios = &drm->vbios;
111 	uint8_t sub = bios->data[bios->fp.xlated_entry + script] + (bios->fp.link_c_increment && dcbent->or & DCB_OUTPUT_C ? 1 : 0);
112 	uint16_t scriptofs = ROM16(bios->data[bios->init_script_tbls_ptr + sub * 2]);
113 #ifdef __powerpc__
114 	struct pci_dev *pdev = to_pci_dev(dev->dev);
115 #endif
116 
117 	if (!bios->fp.xlated_entry || !sub || !scriptofs)
118 		return -EINVAL;
119 
120 	run_digital_op_script(dev, scriptofs, dcbent, head, bios->fp.dual_link);
121 
122 	if (script == LVDS_PANEL_OFF) {
123 		/* off-on delay in ms */
124 		mdelay(ROM16(bios->data[bios->fp.xlated_entry + 7]));
125 	}
126 #ifdef __powerpc__
127 	/* Powerbook specific quirks */
128 	if (script == LVDS_RESET &&
129 	    (pdev->device == 0x0179 || pdev->device == 0x0189 ||
130 	     pdev->device == 0x0329))
131 		nv_write_tmds(dev, dcbent->or, 0, 0x02, 0x72);
132 #endif
133 
134 	return 0;
135 }
136 
137 static int run_lvds_table(struct drm_device *dev, struct dcb_output *dcbent, int head, enum LVDS_script script, int pxclk)
138 {
139 	/*
140 	 * The BIT LVDS table's header has the information to setup the
141 	 * necessary registers. Following the standard 4 byte header are:
142 	 * A bitmask byte and a dual-link transition pxclk value for use in
143 	 * selecting the init script when not using straps; 4 script pointers
144 	 * for panel power, selected by output and on/off; and 8 table pointers
145 	 * for panel init, the needed one determined by output, and bits in the
146 	 * conf byte. These tables are similar to the TMDS tables, consisting
147 	 * of a list of pxclks and script pointers.
148 	 */
149 	struct nouveau_drm *drm = nouveau_drm(dev);
150 	struct nvbios *bios = &drm->vbios;
151 	unsigned int outputset = (dcbent->or == 4) ? 1 : 0;
152 	uint16_t scriptptr = 0, clktable;
153 
154 	/*
155 	 * For now we assume version 3.0 table - g80 support will need some
156 	 * changes
157 	 */
158 
159 	switch (script) {
160 	case LVDS_INIT:
161 		return -ENOSYS;
162 	case LVDS_BACKLIGHT_ON:
163 	case LVDS_PANEL_ON:
164 		scriptptr = ROM16(bios->data[bios->fp.lvdsmanufacturerpointer + 7 + outputset * 2]);
165 		break;
166 	case LVDS_BACKLIGHT_OFF:
167 	case LVDS_PANEL_OFF:
168 		scriptptr = ROM16(bios->data[bios->fp.lvdsmanufacturerpointer + 11 + outputset * 2]);
169 		break;
170 	case LVDS_RESET:
171 		clktable = bios->fp.lvdsmanufacturerpointer + 15;
172 		if (dcbent->or == 4)
173 			clktable += 8;
174 
175 		if (dcbent->lvdsconf.use_straps_for_mode) {
176 			if (bios->fp.dual_link)
177 				clktable += 4;
178 			if (bios->fp.if_is_24bit)
179 				clktable += 2;
180 		} else {
181 			/* using EDID */
182 			int cmpval_24bit = (dcbent->or == 4) ? 4 : 1;
183 
184 			if (bios->fp.dual_link) {
185 				clktable += 4;
186 				cmpval_24bit <<= 1;
187 			}
188 
189 			if (bios->fp.strapless_is_24bit & cmpval_24bit)
190 				clktable += 2;
191 		}
192 
193 		clktable = ROM16(bios->data[clktable]);
194 		if (!clktable) {
195 			NV_ERROR(drm, "Pixel clock comparison table not found\n");
196 			return -ENOENT;
197 		}
198 		scriptptr = clkcmptable(bios, clktable, pxclk);
199 	}
200 
201 	if (!scriptptr) {
202 		NV_ERROR(drm, "LVDS output init script not found\n");
203 		return -ENOENT;
204 	}
205 	run_digital_op_script(dev, scriptptr, dcbent, head, bios->fp.dual_link);
206 
207 	return 0;
208 }
209 
210 int call_lvds_script(struct drm_device *dev, struct dcb_output *dcbent, int head, enum LVDS_script script, int pxclk)
211 {
212 	/*
213 	 * LVDS operations are multiplexed in an effort to present a single API
214 	 * which works with two vastly differing underlying structures.
215 	 * This acts as the demux
216 	 */
217 
218 	struct nouveau_drm *drm = nouveau_drm(dev);
219 	struct nvif_object *device = &drm->client.device.object;
220 	struct nvbios *bios = &drm->vbios;
221 	uint8_t lvds_ver = bios->data[bios->fp.lvdsmanufacturerpointer];
222 	uint32_t sel_clk_binding, sel_clk;
223 	int ret;
224 
225 	if (bios->fp.last_script_invoc == (script << 1 | head) || !lvds_ver ||
226 	    (lvds_ver >= 0x30 && script == LVDS_INIT))
227 		return 0;
228 
229 	if (!bios->fp.lvds_init_run) {
230 		bios->fp.lvds_init_run = true;
231 		call_lvds_script(dev, dcbent, head, LVDS_INIT, pxclk);
232 	}
233 
234 	if (script == LVDS_PANEL_ON && bios->fp.reset_after_pclk_change)
235 		call_lvds_script(dev, dcbent, head, LVDS_RESET, pxclk);
236 	if (script == LVDS_RESET && bios->fp.power_off_for_reset)
237 		call_lvds_script(dev, dcbent, head, LVDS_PANEL_OFF, pxclk);
238 
239 	NV_INFO(drm, "Calling LVDS script %d:\n", script);
240 
241 	/* don't let script change pll->head binding */
242 	sel_clk_binding = nvif_rd32(device, NV_PRAMDAC_SEL_CLK) & 0x50000;
243 
244 	if (lvds_ver < 0x30)
245 		ret = call_lvds_manufacturer_script(dev, dcbent, head, script);
246 	else
247 		ret = run_lvds_table(dev, dcbent, head, script, pxclk);
248 
249 	bios->fp.last_script_invoc = (script << 1 | head);
250 
251 	sel_clk = NVReadRAMDAC(dev, 0, NV_PRAMDAC_SEL_CLK) & ~0x50000;
252 	NVWriteRAMDAC(dev, 0, NV_PRAMDAC_SEL_CLK, sel_clk | sel_clk_binding);
253 	/* some scripts set a value in NV_PBUS_POWERCTRL_2 and break video overlay */
254 	nvif_wr32(device, NV_PBUS_POWERCTRL_2, 0);
255 
256 	return ret;
257 }
258 
259 struct lvdstableheader {
260 	uint8_t lvds_ver, headerlen, recordlen;
261 };
262 
263 static int parse_lvds_manufacturer_table_header(struct drm_device *dev, struct nvbios *bios, struct lvdstableheader *lth)
264 {
265 	/*
266 	 * BMP version (0xa) LVDS table has a simple header of version and
267 	 * record length. The BIT LVDS table has the typical BIT table header:
268 	 * version byte, header length byte, record length byte, and a byte for
269 	 * the maximum number of records that can be held in the table.
270 	 */
271 
272 	struct nouveau_drm *drm = nouveau_drm(dev);
273 	uint8_t lvds_ver, headerlen, recordlen;
274 
275 	memset(lth, 0, sizeof(struct lvdstableheader));
276 
277 	if (bios->fp.lvdsmanufacturerpointer == 0x0) {
278 		NV_ERROR(drm, "Pointer to LVDS manufacturer table invalid\n");
279 		return -EINVAL;
280 	}
281 
282 	lvds_ver = bios->data[bios->fp.lvdsmanufacturerpointer];
283 
284 	switch (lvds_ver) {
285 	case 0x0a:	/* pre NV40 */
286 		headerlen = 2;
287 		recordlen = bios->data[bios->fp.lvdsmanufacturerpointer + 1];
288 		break;
289 	case 0x30:	/* NV4x */
290 		headerlen = bios->data[bios->fp.lvdsmanufacturerpointer + 1];
291 		if (headerlen < 0x1f) {
292 			NV_ERROR(drm, "LVDS table header not understood\n");
293 			return -EINVAL;
294 		}
295 		recordlen = bios->data[bios->fp.lvdsmanufacturerpointer + 2];
296 		break;
297 	case 0x40:	/* G80/G90 */
298 		headerlen = bios->data[bios->fp.lvdsmanufacturerpointer + 1];
299 		if (headerlen < 0x7) {
300 			NV_ERROR(drm, "LVDS table header not understood\n");
301 			return -EINVAL;
302 		}
303 		recordlen = bios->data[bios->fp.lvdsmanufacturerpointer + 2];
304 		break;
305 	default:
306 		NV_ERROR(drm,
307 			 "LVDS table revision %d.%d not currently supported\n",
308 			 lvds_ver >> 4, lvds_ver & 0xf);
309 		return -ENOSYS;
310 	}
311 
312 	lth->lvds_ver = lvds_ver;
313 	lth->headerlen = headerlen;
314 	lth->recordlen = recordlen;
315 
316 	return 0;
317 }
318 
319 static int
320 get_fp_strap(struct drm_device *dev, struct nvbios *bios)
321 {
322 	struct nouveau_drm *drm = nouveau_drm(dev);
323 	struct nvif_object *device = &drm->client.device.object;
324 
325 	/*
326 	 * The fp strap is normally dictated by the "User Strap" in
327 	 * PEXTDEV_BOOT_0[20:16], but on BMP cards when bit 2 of the
328 	 * Internal_Flags struct at 0x48 is set, the user strap gets overriden
329 	 * by the PCI subsystem ID during POST, but not before the previous user
330 	 * strap has been committed to CR58 for CR57=0xf on head A, which may be
331 	 * read and used instead
332 	 */
333 
334 	if (bios->major_version < 5 && bios->data[0x48] & 0x4)
335 		return NVReadVgaCrtc5758(dev, 0, 0xf) & 0xf;
336 
337 	if (drm->client.device.info.family >= NV_DEVICE_INFO_V0_MAXWELL)
338 		return nvif_rd32(device, 0x001800) & 0x0000000f;
339 	else
340 	if (drm->client.device.info.family >= NV_DEVICE_INFO_V0_TESLA)
341 		return (nvif_rd32(device, NV_PEXTDEV_BOOT_0) >> 24) & 0xf;
342 	else
343 		return (nvif_rd32(device, NV_PEXTDEV_BOOT_0) >> 16) & 0xf;
344 }
345 
346 static int parse_fp_mode_table(struct drm_device *dev, struct nvbios *bios)
347 {
348 	struct nouveau_drm *drm = nouveau_drm(dev);
349 	uint8_t *fptable;
350 	uint8_t fptable_ver, headerlen = 0, recordlen, fpentries = 0xf, fpindex;
351 	int ret, ofs, fpstrapping;
352 	struct lvdstableheader lth;
353 
354 	if (bios->fp.fptablepointer == 0x0) {
355 		/* Most laptop cards lack an fp table. They use DDC. */
356 		NV_DEBUG(drm, "Pointer to flat panel table invalid\n");
357 		bios->digital_min_front_porch = 0x4b;
358 		return 0;
359 	}
360 
361 	fptable = &bios->data[bios->fp.fptablepointer];
362 	fptable_ver = fptable[0];
363 
364 	switch (fptable_ver) {
365 	/*
366 	 * BMP version 0x5.0x11 BIOSen have version 1 like tables, but no
367 	 * version field, and miss one of the spread spectrum/PWM bytes.
368 	 * This could affect early GF2Go parts (not seen any appropriate ROMs
369 	 * though). Here we assume that a version of 0x05 matches this case
370 	 * (combining with a BMP version check would be better), as the
371 	 * common case for the panel type field is 0x0005, and that is in
372 	 * fact what we are reading the first byte of.
373 	 */
374 	case 0x05:	/* some NV10, 11, 15, 16 */
375 		recordlen = 42;
376 		ofs = -1;
377 		break;
378 	case 0x10:	/* some NV15/16, and NV11+ */
379 		recordlen = 44;
380 		ofs = 0;
381 		break;
382 	case 0x20:	/* NV40+ */
383 		headerlen = fptable[1];
384 		recordlen = fptable[2];
385 		fpentries = fptable[3];
386 		/*
387 		 * fptable[4] is the minimum
388 		 * RAMDAC_FP_HCRTC -> RAMDAC_FP_HSYNC_START gap
389 		 */
390 		bios->digital_min_front_porch = fptable[4];
391 		ofs = -7;
392 		break;
393 	default:
394 		NV_ERROR(drm,
395 			 "FP table revision %d.%d not currently supported\n",
396 			 fptable_ver >> 4, fptable_ver & 0xf);
397 		return -ENOSYS;
398 	}
399 
400 	if (!bios->is_mobile) /* !mobile only needs digital_min_front_porch */
401 		return 0;
402 
403 	ret = parse_lvds_manufacturer_table_header(dev, bios, &lth);
404 	if (ret)
405 		return ret;
406 
407 	if (lth.lvds_ver == 0x30 || lth.lvds_ver == 0x40) {
408 		bios->fp.fpxlatetableptr = bios->fp.lvdsmanufacturerpointer +
409 							lth.headerlen + 1;
410 		bios->fp.xlatwidth = lth.recordlen;
411 	}
412 	if (bios->fp.fpxlatetableptr == 0x0) {
413 		NV_ERROR(drm, "Pointer to flat panel xlat table invalid\n");
414 		return -EINVAL;
415 	}
416 
417 	fpstrapping = get_fp_strap(dev, bios);
418 
419 	fpindex = bios->data[bios->fp.fpxlatetableptr +
420 					fpstrapping * bios->fp.xlatwidth];
421 
422 	if (fpindex > fpentries) {
423 		NV_ERROR(drm, "Bad flat panel table index\n");
424 		return -ENOENT;
425 	}
426 
427 	/* nv4x cards need both a strap value and fpindex of 0xf to use DDC */
428 	if (lth.lvds_ver > 0x10)
429 		bios->fp_no_ddc = fpstrapping != 0xf || fpindex != 0xf;
430 
431 	/*
432 	 * If either the strap or xlated fpindex value are 0xf there is no
433 	 * panel using a strap-derived bios mode present.  this condition
434 	 * includes, but is different from, the DDC panel indicator above
435 	 */
436 	if (fpstrapping == 0xf || fpindex == 0xf)
437 		return 0;
438 
439 	bios->fp.mode_ptr = bios->fp.fptablepointer + headerlen +
440 			    recordlen * fpindex + ofs;
441 
442 	NV_INFO(drm, "BIOS FP mode: %dx%d (%dkHz pixel clock)\n",
443 		 ROM16(bios->data[bios->fp.mode_ptr + 11]) + 1,
444 		 ROM16(bios->data[bios->fp.mode_ptr + 25]) + 1,
445 		 ROM16(bios->data[bios->fp.mode_ptr + 7]) * 10);
446 
447 	return 0;
448 }
449 
450 bool nouveau_bios_fp_mode(struct drm_device *dev, struct drm_display_mode *mode)
451 {
452 	struct nouveau_drm *drm = nouveau_drm(dev);
453 	struct nvbios *bios = &drm->vbios;
454 	uint8_t *mode_entry = &bios->data[bios->fp.mode_ptr];
455 
456 	if (!mode)	/* just checking whether we can produce a mode */
457 		return bios->fp.mode_ptr;
458 
459 	memset(mode, 0, sizeof(struct drm_display_mode));
460 	/*
461 	 * For version 1.0 (version in byte 0):
462 	 * bytes 1-2 are "panel type", including bits on whether Colour/mono,
463 	 * single/dual link, and type (TFT etc.)
464 	 * bytes 3-6 are bits per colour in RGBX
465 	 */
466 	mode->clock = ROM16(mode_entry[7]) * 10;
467 	/* bytes 9-10 is HActive */
468 	mode->hdisplay = ROM16(mode_entry[11]) + 1;
469 	/*
470 	 * bytes 13-14 is HValid Start
471 	 * bytes 15-16 is HValid End
472 	 */
473 	mode->hsync_start = ROM16(mode_entry[17]) + 1;
474 	mode->hsync_end = ROM16(mode_entry[19]) + 1;
475 	mode->htotal = ROM16(mode_entry[21]) + 1;
476 	/* bytes 23-24, 27-30 similarly, but vertical */
477 	mode->vdisplay = ROM16(mode_entry[25]) + 1;
478 	mode->vsync_start = ROM16(mode_entry[31]) + 1;
479 	mode->vsync_end = ROM16(mode_entry[33]) + 1;
480 	mode->vtotal = ROM16(mode_entry[35]) + 1;
481 	mode->flags |= (mode_entry[37] & 0x10) ?
482 			DRM_MODE_FLAG_PHSYNC : DRM_MODE_FLAG_NHSYNC;
483 	mode->flags |= (mode_entry[37] & 0x1) ?
484 			DRM_MODE_FLAG_PVSYNC : DRM_MODE_FLAG_NVSYNC;
485 	/*
486 	 * bytes 38-39 relate to spread spectrum settings
487 	 * bytes 40-43 are something to do with PWM
488 	 */
489 
490 	mode->status = MODE_OK;
491 	mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
492 	drm_mode_set_name(mode);
493 	return bios->fp.mode_ptr;
494 }
495 
496 int nouveau_bios_parse_lvds_table(struct drm_device *dev, int pxclk, bool *dl, bool *if_is_24bit)
497 {
498 	/*
499 	 * The LVDS table header is (mostly) described in
500 	 * parse_lvds_manufacturer_table_header(): the BIT header additionally
501 	 * contains the dual-link transition pxclk (in 10s kHz), at byte 5 - if
502 	 * straps are not being used for the panel, this specifies the frequency
503 	 * at which modes should be set up in the dual link style.
504 	 *
505 	 * Following the header, the BMP (ver 0xa) table has several records,
506 	 * indexed by a separate xlat table, indexed in turn by the fp strap in
507 	 * EXTDEV_BOOT. Each record had a config byte, followed by 6 script
508 	 * numbers for use by INIT_SUB which controlled panel init and power,
509 	 * and finally a dword of ms to sleep between power off and on
510 	 * operations.
511 	 *
512 	 * In the BIT versions, the table following the header serves as an
513 	 * integrated config and xlat table: the records in the table are
514 	 * indexed by the FP strap nibble in EXTDEV_BOOT, and each record has
515 	 * two bytes - the first as a config byte, the second for indexing the
516 	 * fp mode table pointed to by the BIT 'D' table
517 	 *
518 	 * DDC is not used until after card init, so selecting the correct table
519 	 * entry and setting the dual link flag for EDID equipped panels,
520 	 * requiring tests against the native-mode pixel clock, cannot be done
521 	 * until later, when this function should be called with non-zero pxclk
522 	 */
523 	struct nouveau_drm *drm = nouveau_drm(dev);
524 	struct nvbios *bios = &drm->vbios;
525 	int fpstrapping = get_fp_strap(dev, bios), lvdsmanufacturerindex = 0;
526 	struct lvdstableheader lth;
527 	uint16_t lvdsofs;
528 	int ret, chip_version = bios->chip_version;
529 
530 	ret = parse_lvds_manufacturer_table_header(dev, bios, &lth);
531 	if (ret)
532 		return ret;
533 
534 	switch (lth.lvds_ver) {
535 	case 0x0a:	/* pre NV40 */
536 		lvdsmanufacturerindex = bios->data[
537 					bios->fp.fpxlatemanufacturertableptr +
538 					fpstrapping];
539 
540 		/* we're done if this isn't the EDID panel case */
541 		if (!pxclk)
542 			break;
543 
544 		if (chip_version < 0x25) {
545 			/* nv17 behaviour
546 			 *
547 			 * It seems the old style lvds script pointer is reused
548 			 * to select 18/24 bit colour depth for EDID panels.
549 			 */
550 			lvdsmanufacturerindex =
551 				(bios->legacy.lvds_single_a_script_ptr & 1) ?
552 									2 : 0;
553 			if (pxclk >= bios->fp.duallink_transition_clk)
554 				lvdsmanufacturerindex++;
555 		} else if (chip_version < 0x30) {
556 			/* nv28 behaviour (off-chip encoder)
557 			 *
558 			 * nv28 does a complex dance of first using byte 121 of
559 			 * the EDID to choose the lvdsmanufacturerindex, then
560 			 * later attempting to match the EDID manufacturer and
561 			 * product IDs in a table (signature 'pidt' (panel id
562 			 * table?)), setting an lvdsmanufacturerindex of 0 and
563 			 * an fp strap of the match index (or 0xf if none)
564 			 */
565 			lvdsmanufacturerindex = 0;
566 		} else {
567 			/* nv31, nv34 behaviour */
568 			lvdsmanufacturerindex = 0;
569 			if (pxclk >= bios->fp.duallink_transition_clk)
570 				lvdsmanufacturerindex = 2;
571 			if (pxclk >= 140000)
572 				lvdsmanufacturerindex = 3;
573 		}
574 
575 		/*
576 		 * nvidia set the high nibble of (cr57=f, cr58) to
577 		 * lvdsmanufacturerindex in this case; we don't
578 		 */
579 		break;
580 	case 0x30:	/* NV4x */
581 	case 0x40:	/* G80/G90 */
582 		lvdsmanufacturerindex = fpstrapping;
583 		break;
584 	default:
585 		NV_ERROR(drm, "LVDS table revision not currently supported\n");
586 		return -ENOSYS;
587 	}
588 
589 	lvdsofs = bios->fp.xlated_entry = bios->fp.lvdsmanufacturerpointer + lth.headerlen + lth.recordlen * lvdsmanufacturerindex;
590 	switch (lth.lvds_ver) {
591 	case 0x0a:
592 		bios->fp.power_off_for_reset = bios->data[lvdsofs] & 1;
593 		bios->fp.reset_after_pclk_change = bios->data[lvdsofs] & 2;
594 		bios->fp.dual_link = bios->data[lvdsofs] & 4;
595 		bios->fp.link_c_increment = bios->data[lvdsofs] & 8;
596 		*if_is_24bit = bios->data[lvdsofs] & 16;
597 		break;
598 	case 0x30:
599 	case 0x40:
600 		/*
601 		 * No sign of the "power off for reset" or "reset for panel
602 		 * on" bits, but it's safer to assume we should
603 		 */
604 		bios->fp.power_off_for_reset = true;
605 		bios->fp.reset_after_pclk_change = true;
606 
607 		/*
608 		 * It's ok lvdsofs is wrong for nv4x edid case; dual_link is
609 		 * over-written, and if_is_24bit isn't used
610 		 */
611 		bios->fp.dual_link = bios->data[lvdsofs] & 1;
612 		bios->fp.if_is_24bit = bios->data[lvdsofs] & 2;
613 		bios->fp.strapless_is_24bit = bios->data[bios->fp.lvdsmanufacturerpointer + 4];
614 		bios->fp.duallink_transition_clk = ROM16(bios->data[bios->fp.lvdsmanufacturerpointer + 5]) * 10;
615 		break;
616 	}
617 
618 	/* set dual_link flag for EDID case */
619 	if (pxclk && (chip_version < 0x25 || chip_version > 0x28))
620 		bios->fp.dual_link = (pxclk >= bios->fp.duallink_transition_clk);
621 
622 	*dl = bios->fp.dual_link;
623 
624 	return 0;
625 }
626 
627 int run_tmds_table(struct drm_device *dev, struct dcb_output *dcbent, int head, int pxclk)
628 {
629 	/*
630 	 * the pxclk parameter is in kHz
631 	 *
632 	 * This runs the TMDS regs setting code found on BIT bios cards
633 	 *
634 	 * For ffs(or) == 1 use the first table, for ffs(or) == 2 and
635 	 * ffs(or) == 3, use the second.
636 	 */
637 
638 	struct nouveau_drm *drm = nouveau_drm(dev);
639 	struct nvif_object *device = &drm->client.device.object;
640 	struct nvbios *bios = &drm->vbios;
641 	int cv = bios->chip_version;
642 	uint16_t clktable = 0, scriptptr;
643 	uint32_t sel_clk_binding, sel_clk;
644 
645 	/* pre-nv17 off-chip tmds uses scripts, post nv17 doesn't */
646 	if (cv >= 0x17 && cv != 0x1a && cv != 0x20 &&
647 	    dcbent->location != DCB_LOC_ON_CHIP)
648 		return 0;
649 
650 	switch (ffs(dcbent->or)) {
651 	case 1:
652 		clktable = bios->tmds.output0_script_ptr;
653 		break;
654 	case 2:
655 	case 3:
656 		clktable = bios->tmds.output1_script_ptr;
657 		break;
658 	}
659 
660 	if (!clktable) {
661 		NV_ERROR(drm, "Pixel clock comparison table not found\n");
662 		return -EINVAL;
663 	}
664 
665 	scriptptr = clkcmptable(bios, clktable, pxclk);
666 
667 	if (!scriptptr) {
668 		NV_ERROR(drm, "TMDS output init script not found\n");
669 		return -ENOENT;
670 	}
671 
672 	/* don't let script change pll->head binding */
673 	sel_clk_binding = nvif_rd32(device, NV_PRAMDAC_SEL_CLK) & 0x50000;
674 	run_digital_op_script(dev, scriptptr, dcbent, head, pxclk >= 165000);
675 	sel_clk = NVReadRAMDAC(dev, 0, NV_PRAMDAC_SEL_CLK) & ~0x50000;
676 	NVWriteRAMDAC(dev, 0, NV_PRAMDAC_SEL_CLK, sel_clk | sel_clk_binding);
677 
678 	return 0;
679 }
680 
681 static void parse_script_table_pointers(struct nvbios *bios, uint16_t offset)
682 {
683 	/*
684 	 * Parses the init table segment for pointers used in script execution.
685 	 *
686 	 * offset + 0  (16 bits): init script tables pointer
687 	 * offset + 2  (16 bits): macro index table pointer
688 	 * offset + 4  (16 bits): macro table pointer
689 	 * offset + 6  (16 bits): condition table pointer
690 	 * offset + 8  (16 bits): io condition table pointer
691 	 * offset + 10 (16 bits): io flag condition table pointer
692 	 * offset + 12 (16 bits): init function table pointer
693 	 */
694 
695 	bios->init_script_tbls_ptr = ROM16(bios->data[offset]);
696 }
697 
698 static int parse_bit_A_tbl_entry(struct drm_device *dev, struct nvbios *bios, struct bit_entry *bitentry)
699 {
700 	/*
701 	 * Parses the load detect values for g80 cards.
702 	 *
703 	 * offset + 0 (16 bits): loadval table pointer
704 	 */
705 
706 	struct nouveau_drm *drm = nouveau_drm(dev);
707 	uint16_t load_table_ptr;
708 	uint8_t version, headerlen, entrylen, num_entries;
709 
710 	if (bitentry->length != 3) {
711 		NV_ERROR(drm, "Do not understand BIT A table\n");
712 		return -EINVAL;
713 	}
714 
715 	load_table_ptr = ROM16(bios->data[bitentry->offset]);
716 
717 	if (load_table_ptr == 0x0) {
718 		NV_DEBUG(drm, "Pointer to BIT loadval table invalid\n");
719 		return -EINVAL;
720 	}
721 
722 	version = bios->data[load_table_ptr];
723 
724 	if (version != 0x10) {
725 		NV_ERROR(drm, "BIT loadval table version %d.%d not supported\n",
726 			 version >> 4, version & 0xF);
727 		return -ENOSYS;
728 	}
729 
730 	headerlen = bios->data[load_table_ptr + 1];
731 	entrylen = bios->data[load_table_ptr + 2];
732 	num_entries = bios->data[load_table_ptr + 3];
733 
734 	if (headerlen != 4 || entrylen != 4 || num_entries != 2) {
735 		NV_ERROR(drm, "Do not understand BIT loadval table\n");
736 		return -EINVAL;
737 	}
738 
739 	/* First entry is normal dac, 2nd tv-out perhaps? */
740 	bios->dactestval = ROM32(bios->data[load_table_ptr + headerlen]) & 0x3ff;
741 
742 	return 0;
743 }
744 
745 static int parse_bit_display_tbl_entry(struct drm_device *dev, struct nvbios *bios, struct bit_entry *bitentry)
746 {
747 	/*
748 	 * Parses the flat panel table segment that the bit entry points to.
749 	 * Starting at bitentry->offset:
750 	 *
751 	 * offset + 0  (16 bits): ??? table pointer - seems to have 18 byte
752 	 * records beginning with a freq.
753 	 * offset + 2  (16 bits): mode table pointer
754 	 */
755 	struct nouveau_drm *drm = nouveau_drm(dev);
756 
757 	if (bitentry->length != 4) {
758 		NV_ERROR(drm, "Do not understand BIT display table\n");
759 		return -EINVAL;
760 	}
761 
762 	bios->fp.fptablepointer = ROM16(bios->data[bitentry->offset + 2]);
763 
764 	return 0;
765 }
766 
767 static int parse_bit_init_tbl_entry(struct drm_device *dev, struct nvbios *bios, struct bit_entry *bitentry)
768 {
769 	/*
770 	 * Parses the init table segment that the bit entry points to.
771 	 *
772 	 * See parse_script_table_pointers for layout
773 	 */
774 	struct nouveau_drm *drm = nouveau_drm(dev);
775 
776 	if (bitentry->length < 14) {
777 		NV_ERROR(drm, "Do not understand init table\n");
778 		return -EINVAL;
779 	}
780 
781 	parse_script_table_pointers(bios, bitentry->offset);
782 	return 0;
783 }
784 
785 static int parse_bit_i_tbl_entry(struct drm_device *dev, struct nvbios *bios, struct bit_entry *bitentry)
786 {
787 	/*
788 	 * BIT 'i' (info?) table
789 	 *
790 	 * offset + 0  (32 bits): BIOS version dword (as in B table)
791 	 * offset + 5  (8  bits): BIOS feature byte (same as for BMP?)
792 	 * offset + 13 (16 bits): pointer to table containing DAC load
793 	 * detection comparison values
794 	 *
795 	 * There's other things in the table, purpose unknown
796 	 */
797 
798 	struct nouveau_drm *drm = nouveau_drm(dev);
799 	uint16_t daccmpoffset;
800 	uint8_t dacver, dacheaderlen;
801 
802 	if (bitentry->length < 6) {
803 		NV_ERROR(drm, "BIT i table too short for needed information\n");
804 		return -EINVAL;
805 	}
806 
807 	/*
808 	 * bit 4 seems to indicate a mobile bios (doesn't suffer from BMP's
809 	 * Quadro identity crisis), other bits possibly as for BMP feature byte
810 	 */
811 	bios->feature_byte = bios->data[bitentry->offset + 5];
812 	bios->is_mobile = bios->feature_byte & FEATURE_MOBILE;
813 
814 	if (bitentry->length < 15) {
815 		NV_WARN(drm, "BIT i table not long enough for DAC load "
816 			       "detection comparison table\n");
817 		return -EINVAL;
818 	}
819 
820 	daccmpoffset = ROM16(bios->data[bitentry->offset + 13]);
821 
822 	/* doesn't exist on g80 */
823 	if (!daccmpoffset)
824 		return 0;
825 
826 	/*
827 	 * The first value in the table, following the header, is the
828 	 * comparison value, the second entry is a comparison value for
829 	 * TV load detection.
830 	 */
831 
832 	dacver = bios->data[daccmpoffset];
833 	dacheaderlen = bios->data[daccmpoffset + 1];
834 
835 	if (dacver != 0x00 && dacver != 0x10) {
836 		NV_WARN(drm, "DAC load detection comparison table version "
837 			       "%d.%d not known\n", dacver >> 4, dacver & 0xf);
838 		return -ENOSYS;
839 	}
840 
841 	bios->dactestval = ROM32(bios->data[daccmpoffset + dacheaderlen]);
842 	bios->tvdactestval = ROM32(bios->data[daccmpoffset + dacheaderlen + 4]);
843 
844 	return 0;
845 }
846 
847 static int parse_bit_lvds_tbl_entry(struct drm_device *dev, struct nvbios *bios, struct bit_entry *bitentry)
848 {
849 	/*
850 	 * Parses the LVDS table segment that the bit entry points to.
851 	 * Starting at bitentry->offset:
852 	 *
853 	 * offset + 0  (16 bits): LVDS strap xlate table pointer
854 	 */
855 
856 	struct nouveau_drm *drm = nouveau_drm(dev);
857 
858 	if (bitentry->length != 2) {
859 		NV_ERROR(drm, "Do not understand BIT LVDS table\n");
860 		return -EINVAL;
861 	}
862 
863 	/*
864 	 * No idea if it's still called the LVDS manufacturer table, but
865 	 * the concept's close enough.
866 	 */
867 	bios->fp.lvdsmanufacturerpointer = ROM16(bios->data[bitentry->offset]);
868 
869 	return 0;
870 }
871 
872 static int
873 parse_bit_M_tbl_entry(struct drm_device *dev, struct nvbios *bios,
874 		      struct bit_entry *bitentry)
875 {
876 	/*
877 	 * offset + 2  (8  bits): number of options in an
878 	 * 	INIT_RAM_RESTRICT_ZM_REG_GROUP opcode option set
879 	 * offset + 3  (16 bits): pointer to strap xlate table for RAM
880 	 * 	restrict option selection
881 	 *
882 	 * There's a bunch of bits in this table other than the RAM restrict
883 	 * stuff that we don't use - their use currently unknown
884 	 */
885 
886 	/*
887 	 * Older bios versions don't have a sufficiently long table for
888 	 * what we want
889 	 */
890 	if (bitentry->length < 0x5)
891 		return 0;
892 
893 	if (bitentry->version < 2) {
894 		bios->ram_restrict_group_count = bios->data[bitentry->offset + 2];
895 		bios->ram_restrict_tbl_ptr = ROM16(bios->data[bitentry->offset + 3]);
896 	} else {
897 		bios->ram_restrict_group_count = bios->data[bitentry->offset + 0];
898 		bios->ram_restrict_tbl_ptr = ROM16(bios->data[bitentry->offset + 1]);
899 	}
900 
901 	return 0;
902 }
903 
904 static int parse_bit_tmds_tbl_entry(struct drm_device *dev, struct nvbios *bios, struct bit_entry *bitentry)
905 {
906 	/*
907 	 * Parses the pointer to the TMDS table
908 	 *
909 	 * Starting at bitentry->offset:
910 	 *
911 	 * offset + 0  (16 bits): TMDS table pointer
912 	 *
913 	 * The TMDS table is typically found just before the DCB table, with a
914 	 * characteristic signature of 0x11,0x13 (1.1 being version, 0x13 being
915 	 * length?)
916 	 *
917 	 * At offset +7 is a pointer to a script, which I don't know how to
918 	 * run yet.
919 	 * At offset +9 is a pointer to another script, likewise
920 	 * Offset +11 has a pointer to a table where the first word is a pxclk
921 	 * frequency and the second word a pointer to a script, which should be
922 	 * run if the comparison pxclk frequency is less than the pxclk desired.
923 	 * This repeats for decreasing comparison frequencies
924 	 * Offset +13 has a pointer to a similar table
925 	 * The selection of table (and possibly +7/+9 script) is dictated by
926 	 * "or" from the DCB.
927 	 */
928 
929 	struct nouveau_drm *drm = nouveau_drm(dev);
930 	uint16_t tmdstableptr, script1, script2;
931 
932 	if (bitentry->length != 2) {
933 		NV_ERROR(drm, "Do not understand BIT TMDS table\n");
934 		return -EINVAL;
935 	}
936 
937 	tmdstableptr = ROM16(bios->data[bitentry->offset]);
938 	if (!tmdstableptr) {
939 		NV_INFO(drm, "Pointer to TMDS table not found\n");
940 		return -EINVAL;
941 	}
942 
943 	NV_INFO(drm, "TMDS table version %d.%d\n",
944 		bios->data[tmdstableptr] >> 4, bios->data[tmdstableptr] & 0xf);
945 
946 	/* nv50+ has v2.0, but we don't parse it atm */
947 	if (bios->data[tmdstableptr] != 0x11)
948 		return -ENOSYS;
949 
950 	/*
951 	 * These two scripts are odd: they don't seem to get run even when
952 	 * they are not stubbed.
953 	 */
954 	script1 = ROM16(bios->data[tmdstableptr + 7]);
955 	script2 = ROM16(bios->data[tmdstableptr + 9]);
956 	if (bios->data[script1] != 'q' || bios->data[script2] != 'q')
957 		NV_WARN(drm, "TMDS table script pointers not stubbed\n");
958 
959 	bios->tmds.output0_script_ptr = ROM16(bios->data[tmdstableptr + 11]);
960 	bios->tmds.output1_script_ptr = ROM16(bios->data[tmdstableptr + 13]);
961 
962 	return 0;
963 }
964 
965 struct bit_table {
966 	const char id;
967 	int (* const parse_fn)(struct drm_device *, struct nvbios *, struct bit_entry *);
968 };
969 
970 #define BIT_TABLE(id, funcid) ((struct bit_table){ id, parse_bit_##funcid##_tbl_entry })
971 
972 int
973 bit_table(struct drm_device *dev, u8 id, struct bit_entry *bit)
974 {
975 	struct nouveau_drm *drm = nouveau_drm(dev);
976 	struct nvbios *bios = &drm->vbios;
977 	u8 entries, *entry;
978 
979 	if (bios->type != NVBIOS_BIT)
980 		return -ENODEV;
981 
982 	entries = bios->data[bios->offset + 10];
983 	entry   = &bios->data[bios->offset + 12];
984 	while (entries--) {
985 		if (entry[0] == id) {
986 			bit->id = entry[0];
987 			bit->version = entry[1];
988 			bit->length = ROM16(entry[2]);
989 			bit->offset = ROM16(entry[4]);
990 			bit->data = ROMPTR(dev, entry[4]);
991 			return 0;
992 		}
993 
994 		entry += bios->data[bios->offset + 9];
995 	}
996 
997 	return -ENOENT;
998 }
999 
1000 static int
1001 parse_bit_table(struct nvbios *bios, const uint16_t bitoffset,
1002 		struct bit_table *table)
1003 {
1004 	struct drm_device *dev = bios->dev;
1005 	struct nouveau_drm *drm = nouveau_drm(dev);
1006 	struct bit_entry bitentry;
1007 
1008 	if (bit_table(dev, table->id, &bitentry) == 0)
1009 		return table->parse_fn(dev, bios, &bitentry);
1010 
1011 	NV_INFO(drm, "BIT table '%c' not found\n", table->id);
1012 	return -ENOSYS;
1013 }
1014 
1015 static int
1016 parse_bit_structure(struct nvbios *bios, const uint16_t bitoffset)
1017 {
1018 	int ret;
1019 
1020 	/*
1021 	 * The only restriction on parsing order currently is having 'i' first
1022 	 * for use of bios->*_version or bios->feature_byte while parsing;
1023 	 * functions shouldn't be actually *doing* anything apart from pulling
1024 	 * data from the image into the bios struct, thus no interdependencies
1025 	 */
1026 	ret = parse_bit_table(bios, bitoffset, &BIT_TABLE('i', i));
1027 	if (ret) /* info? */
1028 		return ret;
1029 	if (bios->major_version >= 0x60) /* g80+ */
1030 		parse_bit_table(bios, bitoffset, &BIT_TABLE('A', A));
1031 	parse_bit_table(bios, bitoffset, &BIT_TABLE('D', display));
1032 	ret = parse_bit_table(bios, bitoffset, &BIT_TABLE('I', init));
1033 	if (ret)
1034 		return ret;
1035 	parse_bit_table(bios, bitoffset, &BIT_TABLE('M', M)); /* memory? */
1036 	parse_bit_table(bios, bitoffset, &BIT_TABLE('L', lvds));
1037 	parse_bit_table(bios, bitoffset, &BIT_TABLE('T', tmds));
1038 
1039 	return 0;
1040 }
1041 
1042 static int parse_bmp_structure(struct drm_device *dev, struct nvbios *bios, unsigned int offset)
1043 {
1044 	/*
1045 	 * Parses the BMP structure for useful things, but does not act on them
1046 	 *
1047 	 * offset +   5: BMP major version
1048 	 * offset +   6: BMP minor version
1049 	 * offset +   9: BMP feature byte
1050 	 * offset +  10: BCD encoded BIOS version
1051 	 *
1052 	 * offset +  18: init script table pointer (for bios versions < 5.10h)
1053 	 * offset +  20: extra init script table pointer (for bios
1054 	 * versions < 5.10h)
1055 	 *
1056 	 * offset +  24: memory init table pointer (used on early bios versions)
1057 	 * offset +  26: SDR memory sequencing setup data table
1058 	 * offset +  28: DDR memory sequencing setup data table
1059 	 *
1060 	 * offset +  54: index of I2C CRTC pair to use for CRT output
1061 	 * offset +  55: index of I2C CRTC pair to use for TV output
1062 	 * offset +  56: index of I2C CRTC pair to use for flat panel output
1063 	 * offset +  58: write CRTC index for I2C pair 0
1064 	 * offset +  59: read CRTC index for I2C pair 0
1065 	 * offset +  60: write CRTC index for I2C pair 1
1066 	 * offset +  61: read CRTC index for I2C pair 1
1067 	 *
1068 	 * offset +  67: maximum internal PLL frequency (single stage PLL)
1069 	 * offset +  71: minimum internal PLL frequency (single stage PLL)
1070 	 *
1071 	 * offset +  75: script table pointers, as described in
1072 	 * parse_script_table_pointers
1073 	 *
1074 	 * offset +  89: TMDS single link output A table pointer
1075 	 * offset +  91: TMDS single link output B table pointer
1076 	 * offset +  95: LVDS single link output A table pointer
1077 	 * offset + 105: flat panel timings table pointer
1078 	 * offset + 107: flat panel strapping translation table pointer
1079 	 * offset + 117: LVDS manufacturer panel config table pointer
1080 	 * offset + 119: LVDS manufacturer strapping translation table pointer
1081 	 *
1082 	 * offset + 142: PLL limits table pointer
1083 	 *
1084 	 * offset + 156: minimum pixel clock for LVDS dual link
1085 	 */
1086 
1087 	struct nouveau_drm *drm = nouveau_drm(dev);
1088 	uint8_t *bmp = &bios->data[offset], bmp_version_major, bmp_version_minor;
1089 	uint16_t bmplength;
1090 	uint16_t legacy_scripts_offset, legacy_i2c_offset;
1091 
1092 	/* load needed defaults in case we can't parse this info */
1093 	bios->digital_min_front_porch = 0x4b;
1094 	bios->fmaxvco = 256000;
1095 	bios->fminvco = 128000;
1096 	bios->fp.duallink_transition_clk = 90000;
1097 
1098 	bmp_version_major = bmp[5];
1099 	bmp_version_minor = bmp[6];
1100 
1101 	NV_INFO(drm, "BMP version %d.%d\n",
1102 		 bmp_version_major, bmp_version_minor);
1103 
1104 	/*
1105 	 * Make sure that 0x36 is blank and can't be mistaken for a DCB
1106 	 * pointer on early versions
1107 	 */
1108 	if (bmp_version_major < 5)
1109 		*(uint16_t *)&bios->data[0x36] = 0;
1110 
1111 	/*
1112 	 * Seems that the minor version was 1 for all major versions prior
1113 	 * to 5. Version 6 could theoretically exist, but I suspect BIT
1114 	 * happened instead.
1115 	 */
1116 	if ((bmp_version_major < 5 && bmp_version_minor != 1) || bmp_version_major > 5) {
1117 		NV_ERROR(drm, "You have an unsupported BMP version. "
1118 				"Please send in your bios\n");
1119 		return -ENOSYS;
1120 	}
1121 
1122 	if (bmp_version_major == 0)
1123 		/* nothing that's currently useful in this version */
1124 		return 0;
1125 	else if (bmp_version_major == 1)
1126 		bmplength = 44; /* exact for 1.01 */
1127 	else if (bmp_version_major == 2)
1128 		bmplength = 48; /* exact for 2.01 */
1129 	else if (bmp_version_major == 3)
1130 		bmplength = 54;
1131 		/* guessed - mem init tables added in this version */
1132 	else if (bmp_version_major == 4 || bmp_version_minor < 0x1)
1133 		/* don't know if 5.0 exists... */
1134 		bmplength = 62;
1135 		/* guessed - BMP I2C indices added in version 4*/
1136 	else if (bmp_version_minor < 0x6)
1137 		bmplength = 67; /* exact for 5.01 */
1138 	else if (bmp_version_minor < 0x10)
1139 		bmplength = 75; /* exact for 5.06 */
1140 	else if (bmp_version_minor == 0x10)
1141 		bmplength = 89; /* exact for 5.10h */
1142 	else if (bmp_version_minor < 0x14)
1143 		bmplength = 118; /* exact for 5.11h */
1144 	else if (bmp_version_minor < 0x24)
1145 		/*
1146 		 * Not sure of version where pll limits came in;
1147 		 * certainly exist by 0x24 though.
1148 		 */
1149 		/* length not exact: this is long enough to get lvds members */
1150 		bmplength = 123;
1151 	else if (bmp_version_minor < 0x27)
1152 		/*
1153 		 * Length not exact: this is long enough to get pll limit
1154 		 * member
1155 		 */
1156 		bmplength = 144;
1157 	else
1158 		/*
1159 		 * Length not exact: this is long enough to get dual link
1160 		 * transition clock.
1161 		 */
1162 		bmplength = 158;
1163 
1164 	/* checksum */
1165 	if (nv_cksum(bmp, 8)) {
1166 		NV_ERROR(drm, "Bad BMP checksum\n");
1167 		return -EINVAL;
1168 	}
1169 
1170 	/*
1171 	 * Bit 4 seems to indicate either a mobile bios or a quadro card --
1172 	 * mobile behaviour consistent (nv11+), quadro only seen nv18gl-nv36gl
1173 	 * (not nv10gl), bit 5 that the flat panel tables are present, and
1174 	 * bit 6 a tv bios.
1175 	 */
1176 	bios->feature_byte = bmp[9];
1177 
1178 	if (bmp_version_major < 5 || bmp_version_minor < 0x10)
1179 		bios->old_style_init = true;
1180 	legacy_scripts_offset = 18;
1181 	if (bmp_version_major < 2)
1182 		legacy_scripts_offset -= 4;
1183 	bios->init_script_tbls_ptr = ROM16(bmp[legacy_scripts_offset]);
1184 	bios->extra_init_script_tbl_ptr = ROM16(bmp[legacy_scripts_offset + 2]);
1185 
1186 	if (bmp_version_major > 2) {	/* appears in BMP 3 */
1187 		bios->legacy.mem_init_tbl_ptr = ROM16(bmp[24]);
1188 		bios->legacy.sdr_seq_tbl_ptr = ROM16(bmp[26]);
1189 		bios->legacy.ddr_seq_tbl_ptr = ROM16(bmp[28]);
1190 	}
1191 
1192 	legacy_i2c_offset = 0x48;	/* BMP version 2 & 3 */
1193 	if (bmplength > 61)
1194 		legacy_i2c_offset = offset + 54;
1195 	bios->legacy.i2c_indices.crt = bios->data[legacy_i2c_offset];
1196 	bios->legacy.i2c_indices.tv = bios->data[legacy_i2c_offset + 1];
1197 	bios->legacy.i2c_indices.panel = bios->data[legacy_i2c_offset + 2];
1198 
1199 	if (bmplength > 74) {
1200 		bios->fmaxvco = ROM32(bmp[67]);
1201 		bios->fminvco = ROM32(bmp[71]);
1202 	}
1203 	if (bmplength > 88)
1204 		parse_script_table_pointers(bios, offset + 75);
1205 	if (bmplength > 94) {
1206 		bios->tmds.output0_script_ptr = ROM16(bmp[89]);
1207 		bios->tmds.output1_script_ptr = ROM16(bmp[91]);
1208 		/*
1209 		 * Never observed in use with lvds scripts, but is reused for
1210 		 * 18/24 bit panel interface default for EDID equipped panels
1211 		 * (if_is_24bit not set directly to avoid any oscillation).
1212 		 */
1213 		bios->legacy.lvds_single_a_script_ptr = ROM16(bmp[95]);
1214 	}
1215 	if (bmplength > 108) {
1216 		bios->fp.fptablepointer = ROM16(bmp[105]);
1217 		bios->fp.fpxlatetableptr = ROM16(bmp[107]);
1218 		bios->fp.xlatwidth = 1;
1219 	}
1220 	if (bmplength > 120) {
1221 		bios->fp.lvdsmanufacturerpointer = ROM16(bmp[117]);
1222 		bios->fp.fpxlatemanufacturertableptr = ROM16(bmp[119]);
1223 	}
1224 #if 0
1225 	if (bmplength > 143)
1226 		bios->pll_limit_tbl_ptr = ROM16(bmp[142]);
1227 #endif
1228 
1229 	if (bmplength > 157)
1230 		bios->fp.duallink_transition_clk = ROM16(bmp[156]) * 10;
1231 
1232 	return 0;
1233 }
1234 
1235 static uint16_t findstr(uint8_t *data, int n, const uint8_t *str, int len)
1236 {
1237 	int i, j;
1238 
1239 	for (i = 0; i <= (n - len); i++) {
1240 		for (j = 0; j < len; j++)
1241 			if (data[i + j] != str[j])
1242 				break;
1243 		if (j == len)
1244 			return i;
1245 	}
1246 
1247 	return 0;
1248 }
1249 
1250 void *
1251 olddcb_table(struct drm_device *dev)
1252 {
1253 	struct nouveau_drm *drm = nouveau_drm(dev);
1254 	u8 *dcb = NULL;
1255 
1256 	if (drm->client.device.info.family > NV_DEVICE_INFO_V0_TNT)
1257 		dcb = ROMPTR(dev, drm->vbios.data[0x36]);
1258 	if (!dcb) {
1259 		NV_WARN(drm, "No DCB data found in VBIOS\n");
1260 		return NULL;
1261 	}
1262 
1263 	if (dcb[0] >= 0x42) {
1264 		NV_WARN(drm, "DCB version 0x%02x unknown\n", dcb[0]);
1265 		return NULL;
1266 	} else
1267 	if (dcb[0] >= 0x30) {
1268 		if (ROM32(dcb[6]) == 0x4edcbdcb)
1269 			return dcb;
1270 	} else
1271 	if (dcb[0] >= 0x20) {
1272 		if (ROM32(dcb[4]) == 0x4edcbdcb)
1273 			return dcb;
1274 	} else
1275 	if (dcb[0] >= 0x15) {
1276 		if (!memcmp(&dcb[-7], "DEV_REC", 7))
1277 			return dcb;
1278 	} else {
1279 		/*
1280 		 * v1.4 (some NV15/16, NV11+) seems the same as v1.5, but
1281 		 * always has the same single (crt) entry, even when tv-out
1282 		 * present, so the conclusion is this version cannot really
1283 		 * be used.
1284 		 *
1285 		 * v1.2 tables (some NV6/10, and NV15+) normally have the
1286 		 * same 5 entries, which are not specific to the card and so
1287 		 * no use.
1288 		 *
1289 		 * v1.2 does have an I2C table that read_dcb_i2c_table can
1290 		 * handle, but cards exist (nv11 in #14821) with a bad i2c
1291 		 * table pointer, so use the indices parsed in
1292 		 * parse_bmp_structure.
1293 		 *
1294 		 * v1.1 (NV5+, maybe some NV4) is entirely unhelpful
1295 		 */
1296 		NV_WARN(drm, "No useful DCB data in VBIOS\n");
1297 		return NULL;
1298 	}
1299 
1300 	NV_WARN(drm, "DCB header validation failed\n");
1301 	return NULL;
1302 }
1303 
1304 void *
1305 olddcb_outp(struct drm_device *dev, u8 idx)
1306 {
1307 	u8 *dcb = olddcb_table(dev);
1308 	if (dcb && dcb[0] >= 0x30) {
1309 		if (idx < dcb[2])
1310 			return dcb + dcb[1] + (idx * dcb[3]);
1311 	} else
1312 	if (dcb && dcb[0] >= 0x20) {
1313 		u8 *i2c = ROMPTR(dev, dcb[2]);
1314 		u8 *ent = dcb + 8 + (idx * 8);
1315 		if (i2c && ent < i2c)
1316 			return ent;
1317 	} else
1318 	if (dcb && dcb[0] >= 0x15) {
1319 		u8 *i2c = ROMPTR(dev, dcb[2]);
1320 		u8 *ent = dcb + 4 + (idx * 10);
1321 		if (i2c && ent < i2c)
1322 			return ent;
1323 	}
1324 
1325 	return NULL;
1326 }
1327 
1328 int
1329 olddcb_outp_foreach(struct drm_device *dev, void *data,
1330 		 int (*exec)(struct drm_device *, void *, int idx, u8 *outp))
1331 {
1332 	int ret, idx = -1;
1333 	u8 *outp = NULL;
1334 	while ((outp = olddcb_outp(dev, ++idx))) {
1335 		if (ROM32(outp[0]) == 0x00000000)
1336 			break; /* seen on an NV11 with DCB v1.5 */
1337 		if (ROM32(outp[0]) == 0xffffffff)
1338 			break; /* seen on an NV17 with DCB v2.0 */
1339 
1340 		if ((outp[0] & 0x0f) == DCB_OUTPUT_UNUSED)
1341 			continue;
1342 		if ((outp[0] & 0x0f) == DCB_OUTPUT_EOL)
1343 			break;
1344 
1345 		ret = exec(dev, data, idx, outp);
1346 		if (ret)
1347 			return ret;
1348 	}
1349 
1350 	return 0;
1351 }
1352 
1353 u8 *
1354 olddcb_conntab(struct drm_device *dev)
1355 {
1356 	u8 *dcb = olddcb_table(dev);
1357 	if (dcb && dcb[0] >= 0x30 && dcb[1] >= 0x16) {
1358 		u8 *conntab = ROMPTR(dev, dcb[0x14]);
1359 		if (conntab && conntab[0] >= 0x30 && conntab[0] <= 0x40)
1360 			return conntab;
1361 	}
1362 	return NULL;
1363 }
1364 
1365 u8 *
1366 olddcb_conn(struct drm_device *dev, u8 idx)
1367 {
1368 	u8 *conntab = olddcb_conntab(dev);
1369 	if (conntab && idx < conntab[2])
1370 		return conntab + conntab[1] + (idx * conntab[3]);
1371 	return NULL;
1372 }
1373 
1374 static struct dcb_output *new_dcb_entry(struct dcb_table *dcb)
1375 {
1376 	struct dcb_output *entry = &dcb->entry[dcb->entries];
1377 
1378 	memset(entry, 0, sizeof(struct dcb_output));
1379 	entry->index = dcb->entries++;
1380 
1381 	return entry;
1382 }
1383 
1384 static void fabricate_dcb_output(struct dcb_table *dcb, int type, int i2c,
1385 				 int heads, int or)
1386 {
1387 	struct dcb_output *entry = new_dcb_entry(dcb);
1388 
1389 	entry->type = type;
1390 	entry->i2c_index = i2c;
1391 	entry->heads = heads;
1392 	if (type != DCB_OUTPUT_ANALOG)
1393 		entry->location = !DCB_LOC_ON_CHIP; /* ie OFF CHIP */
1394 	entry->or = or;
1395 }
1396 
1397 static bool
1398 parse_dcb20_entry(struct drm_device *dev, struct dcb_table *dcb,
1399 		  uint32_t conn, uint32_t conf, struct dcb_output *entry)
1400 {
1401 	struct nouveau_drm *drm = nouveau_drm(dev);
1402 	int link = 0;
1403 
1404 	entry->type = conn & 0xf;
1405 	entry->i2c_index = (conn >> 4) & 0xf;
1406 	entry->heads = (conn >> 8) & 0xf;
1407 	entry->connector = (conn >> 12) & 0xf;
1408 	entry->bus = (conn >> 16) & 0xf;
1409 	entry->location = (conn >> 20) & 0x3;
1410 	entry->or = (conn >> 24) & 0xf;
1411 
1412 	switch (entry->type) {
1413 	case DCB_OUTPUT_ANALOG:
1414 		/*
1415 		 * Although the rest of a CRT conf dword is usually
1416 		 * zeros, mac biosen have stuff there so we must mask
1417 		 */
1418 		entry->crtconf.maxfreq = (dcb->version < 0x30) ?
1419 					 (conf & 0xffff) * 10 :
1420 					 (conf & 0xff) * 10000;
1421 		break;
1422 	case DCB_OUTPUT_LVDS:
1423 		{
1424 		uint32_t mask;
1425 		if (conf & 0x1)
1426 			entry->lvdsconf.use_straps_for_mode = true;
1427 		if (dcb->version < 0x22) {
1428 			mask = ~0xd;
1429 			/*
1430 			 * The laptop in bug 14567 lies and claims to not use
1431 			 * straps when it does, so assume all DCB 2.0 laptops
1432 			 * use straps, until a broken EDID using one is produced
1433 			 */
1434 			entry->lvdsconf.use_straps_for_mode = true;
1435 			/*
1436 			 * Both 0x4 and 0x8 show up in v2.0 tables; assume they
1437 			 * mean the same thing (probably wrong, but might work)
1438 			 */
1439 			if (conf & 0x4 || conf & 0x8)
1440 				entry->lvdsconf.use_power_scripts = true;
1441 		} else {
1442 			mask = ~0x7;
1443 			if (conf & 0x2)
1444 				entry->lvdsconf.use_acpi_for_edid = true;
1445 			if (conf & 0x4)
1446 				entry->lvdsconf.use_power_scripts = true;
1447 			entry->lvdsconf.sor.link = (conf & 0x00000030) >> 4;
1448 			link = entry->lvdsconf.sor.link;
1449 		}
1450 		if (conf & mask) {
1451 			/*
1452 			 * Until we even try to use these on G8x, it's
1453 			 * useless reporting unknown bits.  They all are.
1454 			 */
1455 			if (dcb->version >= 0x40)
1456 				break;
1457 
1458 			NV_ERROR(drm, "Unknown LVDS configuration bits, "
1459 				      "please report\n");
1460 		}
1461 		break;
1462 		}
1463 	case DCB_OUTPUT_TV:
1464 	{
1465 		if (dcb->version >= 0x30)
1466 			entry->tvconf.has_component_output = conf & (0x8 << 4);
1467 		else
1468 			entry->tvconf.has_component_output = false;
1469 
1470 		break;
1471 	}
1472 	case DCB_OUTPUT_DP:
1473 		entry->dpconf.sor.link = (conf & 0x00000030) >> 4;
1474 		entry->extdev = (conf & 0x0000ff00) >> 8;
1475 		switch ((conf & 0x00e00000) >> 21) {
1476 		case 0:
1477 			entry->dpconf.link_bw = 162000;
1478 			break;
1479 		case 1:
1480 			entry->dpconf.link_bw = 270000;
1481 			break;
1482 		case 2:
1483 			entry->dpconf.link_bw = 540000;
1484 			break;
1485 		case 3:
1486 		default:
1487 			entry->dpconf.link_bw = 810000;
1488 			break;
1489 		}
1490 		switch ((conf & 0x0f000000) >> 24) {
1491 		case 0xf:
1492 		case 0x4:
1493 			entry->dpconf.link_nr = 4;
1494 			break;
1495 		case 0x3:
1496 		case 0x2:
1497 			entry->dpconf.link_nr = 2;
1498 			break;
1499 		default:
1500 			entry->dpconf.link_nr = 1;
1501 			break;
1502 		}
1503 		link = entry->dpconf.sor.link;
1504 		break;
1505 	case DCB_OUTPUT_TMDS:
1506 		if (dcb->version >= 0x40) {
1507 			entry->tmdsconf.sor.link = (conf & 0x00000030) >> 4;
1508 			entry->extdev = (conf & 0x0000ff00) >> 8;
1509 			link = entry->tmdsconf.sor.link;
1510 		}
1511 		else if (dcb->version >= 0x30)
1512 			entry->tmdsconf.slave_addr = (conf & 0x00000700) >> 8;
1513 		else if (dcb->version >= 0x22)
1514 			entry->tmdsconf.slave_addr = (conf & 0x00000070) >> 4;
1515 		break;
1516 	case DCB_OUTPUT_EOL:
1517 		/* weird g80 mobile type that "nv" treats as a terminator */
1518 		dcb->entries--;
1519 		return false;
1520 	default:
1521 		break;
1522 	}
1523 
1524 	if (dcb->version < 0x40) {
1525 		/* Normal entries consist of a single bit, but dual link has
1526 		 * the next most significant bit set too
1527 		 */
1528 		entry->duallink_possible =
1529 			((1 << (ffs(entry->or) - 1)) * 3 == entry->or);
1530 	} else {
1531 		entry->duallink_possible = (entry->sorconf.link == 3);
1532 	}
1533 
1534 	/* unsure what DCB version introduces this, 3.0? */
1535 	if (conf & 0x100000)
1536 		entry->i2c_upper_default = true;
1537 
1538 	entry->hasht = (entry->extdev << 8) | (entry->location << 4) |
1539 			entry->type;
1540 	entry->hashm = (entry->heads << 8) | (link << 6) | entry->or;
1541 	return true;
1542 }
1543 
1544 static bool
1545 parse_dcb15_entry(struct drm_device *dev, struct dcb_table *dcb,
1546 		  uint32_t conn, uint32_t conf, struct dcb_output *entry)
1547 {
1548 	struct nouveau_drm *drm = nouveau_drm(dev);
1549 
1550 	switch (conn & 0x0000000f) {
1551 	case 0:
1552 		entry->type = DCB_OUTPUT_ANALOG;
1553 		break;
1554 	case 1:
1555 		entry->type = DCB_OUTPUT_TV;
1556 		break;
1557 	case 2:
1558 	case 4:
1559 		if (conn & 0x10)
1560 			entry->type = DCB_OUTPUT_LVDS;
1561 		else
1562 			entry->type = DCB_OUTPUT_TMDS;
1563 		break;
1564 	case 3:
1565 		entry->type = DCB_OUTPUT_LVDS;
1566 		break;
1567 	default:
1568 		NV_ERROR(drm, "Unknown DCB type %d\n", conn & 0x0000000f);
1569 		return false;
1570 	}
1571 
1572 	entry->i2c_index = (conn & 0x0003c000) >> 14;
1573 	entry->heads = ((conn & 0x001c0000) >> 18) + 1;
1574 	entry->or = entry->heads; /* same as heads, hopefully safe enough */
1575 	entry->location = (conn & 0x01e00000) >> 21;
1576 	entry->bus = (conn & 0x0e000000) >> 25;
1577 	entry->duallink_possible = false;
1578 
1579 	switch (entry->type) {
1580 	case DCB_OUTPUT_ANALOG:
1581 		entry->crtconf.maxfreq = (conf & 0xffff) * 10;
1582 		break;
1583 	case DCB_OUTPUT_TV:
1584 		entry->tvconf.has_component_output = false;
1585 		break;
1586 	case DCB_OUTPUT_LVDS:
1587 		if ((conn & 0x00003f00) >> 8 != 0x10)
1588 			entry->lvdsconf.use_straps_for_mode = true;
1589 		entry->lvdsconf.use_power_scripts = true;
1590 		break;
1591 	default:
1592 		break;
1593 	}
1594 
1595 	return true;
1596 }
1597 
1598 static
1599 void merge_like_dcb_entries(struct drm_device *dev, struct dcb_table *dcb)
1600 {
1601 	/*
1602 	 * DCB v2.0 lists each output combination separately.
1603 	 * Here we merge compatible entries to have fewer outputs, with
1604 	 * more options
1605 	 */
1606 
1607 	struct nouveau_drm *drm = nouveau_drm(dev);
1608 	int i, newentries = 0;
1609 
1610 	for (i = 0; i < dcb->entries; i++) {
1611 		struct dcb_output *ient = &dcb->entry[i];
1612 		int j;
1613 
1614 		for (j = i + 1; j < dcb->entries; j++) {
1615 			struct dcb_output *jent = &dcb->entry[j];
1616 
1617 			if (jent->type == 100) /* already merged entry */
1618 				continue;
1619 
1620 			/* merge heads field when all other fields the same */
1621 			if (jent->i2c_index == ient->i2c_index &&
1622 			    jent->type == ient->type &&
1623 			    jent->location == ient->location &&
1624 			    jent->or == ient->or) {
1625 				NV_INFO(drm, "Merging DCB entries %d and %d\n",
1626 					 i, j);
1627 				ient->heads |= jent->heads;
1628 				jent->type = 100; /* dummy value */
1629 			}
1630 		}
1631 	}
1632 
1633 	/* Compact entries merged into others out of dcb */
1634 	for (i = 0; i < dcb->entries; i++) {
1635 		if (dcb->entry[i].type == 100)
1636 			continue;
1637 
1638 		if (newentries != i) {
1639 			dcb->entry[newentries] = dcb->entry[i];
1640 			dcb->entry[newentries].index = newentries;
1641 		}
1642 		newentries++;
1643 	}
1644 
1645 	dcb->entries = newentries;
1646 }
1647 
1648 static bool
1649 apply_dcb_encoder_quirks(struct drm_device *dev, int idx, u32 *conn, u32 *conf)
1650 {
1651 	struct nouveau_drm *drm = nouveau_drm(dev);
1652 	struct dcb_table *dcb = &drm->vbios.dcb;
1653 
1654 	/* Dell Precision M6300
1655 	 *   DCB entry 2: 02025312 00000010
1656 	 *   DCB entry 3: 02026312 00000020
1657 	 *
1658 	 * Identical, except apparently a different connector on a
1659 	 * different SOR link.  Not a clue how we're supposed to know
1660 	 * which one is in use if it even shares an i2c line...
1661 	 *
1662 	 * Ignore the connector on the second SOR link to prevent
1663 	 * nasty problems until this is sorted (assuming it's not a
1664 	 * VBIOS bug).
1665 	 */
1666 	if (nv_match_device(dev, 0x040d, 0x1028, 0x019b)) {
1667 		if (*conn == 0x02026312 && *conf == 0x00000020)
1668 			return false;
1669 	}
1670 
1671 	/* GeForce3 Ti 200
1672 	 *
1673 	 * DCB reports an LVDS output that should be TMDS:
1674 	 *   DCB entry 1: f2005014 ffffffff
1675 	 */
1676 	if (nv_match_device(dev, 0x0201, 0x1462, 0x8851)) {
1677 		if (*conn == 0xf2005014 && *conf == 0xffffffff) {
1678 			fabricate_dcb_output(dcb, DCB_OUTPUT_TMDS, 1, 1, 1);
1679 			return false;
1680 		}
1681 	}
1682 
1683 	/* XFX GT-240X-YA
1684 	 *
1685 	 * So many things wrong here, replace the entire encoder table..
1686 	 */
1687 	if (nv_match_device(dev, 0x0ca3, 0x1682, 0x3003)) {
1688 		if (idx == 0) {
1689 			*conn = 0x02001300; /* VGA, connector 1 */
1690 			*conf = 0x00000028;
1691 		} else
1692 		if (idx == 1) {
1693 			*conn = 0x01010312; /* DVI, connector 0 */
1694 			*conf = 0x00020030;
1695 		} else
1696 		if (idx == 2) {
1697 			*conn = 0x01010310; /* VGA, connector 0 */
1698 			*conf = 0x00000028;
1699 		} else
1700 		if (idx == 3) {
1701 			*conn = 0x02022362; /* HDMI, connector 2 */
1702 			*conf = 0x00020010;
1703 		} else {
1704 			*conn = 0x0000000e; /* EOL */
1705 			*conf = 0x00000000;
1706 		}
1707 	}
1708 
1709 	/* Some other twisted XFX board (rhbz#694914)
1710 	 *
1711 	 * The DVI/VGA encoder combo that's supposed to represent the
1712 	 * DVI-I connector actually point at two different ones, and
1713 	 * the HDMI connector ends up paired with the VGA instead.
1714 	 *
1715 	 * Connector table is missing anything for VGA at all, pointing it
1716 	 * an invalid conntab entry 2 so we figure it out ourself.
1717 	 */
1718 	if (nv_match_device(dev, 0x0615, 0x1682, 0x2605)) {
1719 		if (idx == 0) {
1720 			*conn = 0x02002300; /* VGA, connector 2 */
1721 			*conf = 0x00000028;
1722 		} else
1723 		if (idx == 1) {
1724 			*conn = 0x01010312; /* DVI, connector 0 */
1725 			*conf = 0x00020030;
1726 		} else
1727 		if (idx == 2) {
1728 			*conn = 0x04020310; /* VGA, connector 0 */
1729 			*conf = 0x00000028;
1730 		} else
1731 		if (idx == 3) {
1732 			*conn = 0x02021322; /* HDMI, connector 1 */
1733 			*conf = 0x00020010;
1734 		} else {
1735 			*conn = 0x0000000e; /* EOL */
1736 			*conf = 0x00000000;
1737 		}
1738 	}
1739 
1740 	/* fdo#50830: connector indices for VGA and DVI-I are backwards */
1741 	if (nv_match_device(dev, 0x0421, 0x3842, 0xc793)) {
1742 		if (idx == 0 && *conn == 0x02000300)
1743 			*conn = 0x02011300;
1744 		else
1745 		if (idx == 1 && *conn == 0x04011310)
1746 			*conn = 0x04000310;
1747 		else
1748 		if (idx == 2 && *conn == 0x02011312)
1749 			*conn = 0x02000312;
1750 	}
1751 
1752 	return true;
1753 }
1754 
1755 static void
1756 fabricate_dcb_encoder_table(struct drm_device *dev, struct nvbios *bios)
1757 {
1758 	struct dcb_table *dcb = &bios->dcb;
1759 	int all_heads = (nv_two_heads(dev) ? 3 : 1);
1760 
1761 #ifdef __powerpc__
1762 	/* Apple iMac G4 NV17 */
1763 	if (of_machine_is_compatible("PowerMac4,5")) {
1764 		fabricate_dcb_output(dcb, DCB_OUTPUT_TMDS, 0, all_heads, 1);
1765 		fabricate_dcb_output(dcb, DCB_OUTPUT_ANALOG, 1, all_heads, 2);
1766 		return;
1767 	}
1768 #endif
1769 
1770 	/* Make up some sane defaults */
1771 	fabricate_dcb_output(dcb, DCB_OUTPUT_ANALOG,
1772 			     bios->legacy.i2c_indices.crt, 1, 1);
1773 
1774 	if (nv04_tv_identify(dev, bios->legacy.i2c_indices.tv) >= 0)
1775 		fabricate_dcb_output(dcb, DCB_OUTPUT_TV,
1776 				     bios->legacy.i2c_indices.tv,
1777 				     all_heads, 0);
1778 
1779 	else if (bios->tmds.output0_script_ptr ||
1780 		 bios->tmds.output1_script_ptr)
1781 		fabricate_dcb_output(dcb, DCB_OUTPUT_TMDS,
1782 				     bios->legacy.i2c_indices.panel,
1783 				     all_heads, 1);
1784 }
1785 
1786 static int
1787 parse_dcb_entry(struct drm_device *dev, void *data, int idx, u8 *outp)
1788 {
1789 	struct nouveau_drm *drm = nouveau_drm(dev);
1790 	struct dcb_table *dcb = &drm->vbios.dcb;
1791 	u32 conf = (dcb->version >= 0x20) ? ROM32(outp[4]) : ROM32(outp[6]);
1792 	u32 conn = ROM32(outp[0]);
1793 	bool ret;
1794 
1795 	if (apply_dcb_encoder_quirks(dev, idx, &conn, &conf)) {
1796 		struct dcb_output *entry = new_dcb_entry(dcb);
1797 
1798 		NV_INFO(drm, "DCB outp %02d: %08x %08x\n", idx, conn, conf);
1799 
1800 		if (dcb->version >= 0x20)
1801 			ret = parse_dcb20_entry(dev, dcb, conn, conf, entry);
1802 		else
1803 			ret = parse_dcb15_entry(dev, dcb, conn, conf, entry);
1804 		if (!ret)
1805 			return 1; /* stop parsing */
1806 
1807 		/* Ignore the I2C index for on-chip TV-out, as there
1808 		 * are cards with bogus values (nv31m in bug 23212),
1809 		 * and it's otherwise useless.
1810 		 */
1811 		if (entry->type == DCB_OUTPUT_TV &&
1812 		    entry->location == DCB_LOC_ON_CHIP)
1813 			entry->i2c_index = 0x0f;
1814 	}
1815 
1816 	return 0;
1817 }
1818 
1819 static void
1820 dcb_fake_connectors(struct nvbios *bios)
1821 {
1822 	struct dcb_table *dcbt = &bios->dcb;
1823 	u8 map[16] = { };
1824 	int i, idx = 0;
1825 
1826 	/* heuristic: if we ever get a non-zero connector field, assume
1827 	 * that all the indices are valid and we don't need fake them.
1828 	 *
1829 	 * and, as usual, a blacklist of boards with bad bios data..
1830 	 */
1831 	if (!nv_match_device(bios->dev, 0x0392, 0x107d, 0x20a2)) {
1832 		for (i = 0; i < dcbt->entries; i++) {
1833 			if (dcbt->entry[i].connector)
1834 				return;
1835 		}
1836 	}
1837 
1838 	/* no useful connector info available, we need to make it up
1839 	 * ourselves.  the rule here is: anything on the same i2c bus
1840 	 * is considered to be on the same connector.  any output
1841 	 * without an associated i2c bus is assigned its own unique
1842 	 * connector index.
1843 	 */
1844 	for (i = 0; i < dcbt->entries; i++) {
1845 		u8 i2c = dcbt->entry[i].i2c_index;
1846 		if (i2c == 0x0f) {
1847 			dcbt->entry[i].connector = idx++;
1848 		} else {
1849 			if (!map[i2c])
1850 				map[i2c] = ++idx;
1851 			dcbt->entry[i].connector = map[i2c] - 1;
1852 		}
1853 	}
1854 
1855 	/* if we created more than one connector, destroy the connector
1856 	 * table - just in case it has random, rather than stub, entries.
1857 	 */
1858 	if (i > 1) {
1859 		u8 *conntab = olddcb_conntab(bios->dev);
1860 		if (conntab)
1861 			conntab[0] = 0x00;
1862 	}
1863 }
1864 
1865 static int
1866 parse_dcb_table(struct drm_device *dev, struct nvbios *bios)
1867 {
1868 	struct nouveau_drm *drm = nouveau_drm(dev);
1869 	struct dcb_table *dcb = &bios->dcb;
1870 	u8 *dcbt, *conn;
1871 	int idx;
1872 
1873 	dcbt = olddcb_table(dev);
1874 	if (!dcbt) {
1875 		/* handle pre-DCB boards */
1876 		if (bios->type == NVBIOS_BMP) {
1877 			fabricate_dcb_encoder_table(dev, bios);
1878 			return 0;
1879 		}
1880 
1881 		return -EINVAL;
1882 	}
1883 
1884 	NV_INFO(drm, "DCB version %d.%d\n", dcbt[0] >> 4, dcbt[0] & 0xf);
1885 
1886 	dcb->version = dcbt[0];
1887 	olddcb_outp_foreach(dev, NULL, parse_dcb_entry);
1888 
1889 	/*
1890 	 * apart for v2.1+ not being known for requiring merging, this
1891 	 * guarantees dcbent->index is the index of the entry in the rom image
1892 	 */
1893 	if (dcb->version < 0x21)
1894 		merge_like_dcb_entries(dev, dcb);
1895 
1896 	/* dump connector table entries to log, if any exist */
1897 	idx = -1;
1898 	while ((conn = olddcb_conn(dev, ++idx))) {
1899 		if (conn[0] != 0xff) {
1900 			if (olddcb_conntab(dev)[3] < 4)
1901 				NV_INFO(drm, "DCB conn %02d: %04x\n",
1902 					idx, ROM16(conn[0]));
1903 			else
1904 				NV_INFO(drm, "DCB conn %02d: %08x\n",
1905 					idx, ROM32(conn[0]));
1906 		}
1907 	}
1908 	dcb_fake_connectors(bios);
1909 	return 0;
1910 }
1911 
1912 static int load_nv17_hwsq_ucode_entry(struct drm_device *dev, struct nvbios *bios, uint16_t hwsq_offset, int entry)
1913 {
1914 	/*
1915 	 * The header following the "HWSQ" signature has the number of entries,
1916 	 * and the entry size
1917 	 *
1918 	 * An entry consists of a dword to write to the sequencer control reg
1919 	 * (0x00001304), followed by the ucode bytes, written sequentially,
1920 	 * starting at reg 0x00001400
1921 	 */
1922 
1923 	struct nouveau_drm *drm = nouveau_drm(dev);
1924 	struct nvif_object *device = &drm->client.device.object;
1925 	uint8_t bytes_to_write;
1926 	uint16_t hwsq_entry_offset;
1927 	int i;
1928 
1929 	if (bios->data[hwsq_offset] <= entry) {
1930 		NV_ERROR(drm, "Too few entries in HW sequencer table for "
1931 				"requested entry\n");
1932 		return -ENOENT;
1933 	}
1934 
1935 	bytes_to_write = bios->data[hwsq_offset + 1];
1936 
1937 	if (bytes_to_write != 36) {
1938 		NV_ERROR(drm, "Unknown HW sequencer entry size\n");
1939 		return -EINVAL;
1940 	}
1941 
1942 	NV_INFO(drm, "Loading NV17 power sequencing microcode\n");
1943 
1944 	hwsq_entry_offset = hwsq_offset + 2 + entry * bytes_to_write;
1945 
1946 	/* set sequencer control */
1947 	nvif_wr32(device, 0x00001304, ROM32(bios->data[hwsq_entry_offset]));
1948 	bytes_to_write -= 4;
1949 
1950 	/* write ucode */
1951 	for (i = 0; i < bytes_to_write; i += 4)
1952 		nvif_wr32(device, 0x00001400 + i, ROM32(bios->data[hwsq_entry_offset + i + 4]));
1953 
1954 	/* twiddle NV_PBUS_DEBUG_4 */
1955 	nvif_wr32(device, NV_PBUS_DEBUG_4, nvif_rd32(device, NV_PBUS_DEBUG_4) | 0x18);
1956 
1957 	return 0;
1958 }
1959 
1960 static int load_nv17_hw_sequencer_ucode(struct drm_device *dev,
1961 					struct nvbios *bios)
1962 {
1963 	/*
1964 	 * BMP based cards, from NV17, need a microcode loading to correctly
1965 	 * control the GPIO etc for LVDS panels
1966 	 *
1967 	 * BIT based cards seem to do this directly in the init scripts
1968 	 *
1969 	 * The microcode entries are found by the "HWSQ" signature.
1970 	 */
1971 
1972 	static const uint8_t hwsq_signature[] = { 'H', 'W', 'S', 'Q' };
1973 	const int sz = sizeof(hwsq_signature);
1974 	int hwsq_offset;
1975 
1976 	hwsq_offset = findstr(bios->data, bios->length, hwsq_signature, sz);
1977 	if (!hwsq_offset)
1978 		return 0;
1979 
1980 	/* always use entry 0? */
1981 	return load_nv17_hwsq_ucode_entry(dev, bios, hwsq_offset + sz, 0);
1982 }
1983 
1984 uint8_t *nouveau_bios_embedded_edid(struct drm_device *dev)
1985 {
1986 	struct nouveau_drm *drm = nouveau_drm(dev);
1987 	struct nvbios *bios = &drm->vbios;
1988 	static const uint8_t edid_sig[] = {
1989 			0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00 };
1990 	uint16_t offset = 0;
1991 	uint16_t newoffset;
1992 	int searchlen = NV_PROM_SIZE;
1993 
1994 	if (bios->fp.edid)
1995 		return bios->fp.edid;
1996 
1997 	while (searchlen) {
1998 		newoffset = findstr(&bios->data[offset], searchlen,
1999 								edid_sig, 8);
2000 		if (!newoffset)
2001 			return NULL;
2002 		offset += newoffset;
2003 		if (!nv_cksum(&bios->data[offset], EDID1_LEN))
2004 			break;
2005 
2006 		searchlen -= offset;
2007 		offset++;
2008 	}
2009 
2010 	NV_INFO(drm, "Found EDID in BIOS\n");
2011 
2012 	return bios->fp.edid = &bios->data[offset];
2013 }
2014 
2015 static bool NVInitVBIOS(struct drm_device *dev)
2016 {
2017 	struct nouveau_drm *drm = nouveau_drm(dev);
2018 	struct nvkm_bios *bios = nvxx_bios(&drm->client.device);
2019 	struct nvbios *legacy = &drm->vbios;
2020 
2021 	memset(legacy, 0, sizeof(struct nvbios));
2022 	spin_lock_init(&legacy->lock);
2023 	legacy->dev = dev;
2024 
2025 	legacy->data = bios->data;
2026 	legacy->length = bios->size;
2027 	legacy->major_version = bios->version.major;
2028 	legacy->chip_version = bios->version.chip;
2029 	if (bios->bit_offset) {
2030 		legacy->type = NVBIOS_BIT;
2031 		legacy->offset = bios->bit_offset;
2032 		return !parse_bit_structure(legacy, legacy->offset + 6);
2033 	} else
2034 	if (bios->bmp_offset) {
2035 		legacy->type = NVBIOS_BMP;
2036 		legacy->offset = bios->bmp_offset;
2037 		return !parse_bmp_structure(dev, legacy, legacy->offset);
2038 	}
2039 
2040 	return false;
2041 }
2042 
2043 int
2044 nouveau_run_vbios_init(struct drm_device *dev)
2045 {
2046 	struct nouveau_drm *drm = nouveau_drm(dev);
2047 	struct nvbios *bios = &drm->vbios;
2048 
2049 	/* Reset the BIOS head to 0. */
2050 	bios->state.crtchead = 0;
2051 
2052 	if (bios->major_version < 5)	/* BMP only */
2053 		load_nv17_hw_sequencer_ucode(dev, bios);
2054 
2055 	if (bios->execute) {
2056 		bios->fp.last_script_invoc = 0;
2057 		bios->fp.lvds_init_run = false;
2058 	}
2059 
2060 	return 0;
2061 }
2062 
2063 static bool
2064 nouveau_bios_posted(struct drm_device *dev)
2065 {
2066 	struct nouveau_drm *drm = nouveau_drm(dev);
2067 	unsigned htotal;
2068 
2069 	if (drm->client.device.info.family >= NV_DEVICE_INFO_V0_TESLA)
2070 		return true;
2071 
2072 	htotal  = NVReadVgaCrtc(dev, 0, 0x06);
2073 	htotal |= (NVReadVgaCrtc(dev, 0, 0x07) & 0x01) << 8;
2074 	htotal |= (NVReadVgaCrtc(dev, 0, 0x07) & 0x20) << 4;
2075 	htotal |= (NVReadVgaCrtc(dev, 0, 0x25) & 0x01) << 10;
2076 	htotal |= (NVReadVgaCrtc(dev, 0, 0x41) & 0x01) << 11;
2077 	return (htotal != 0);
2078 }
2079 
2080 int
2081 nouveau_bios_init(struct drm_device *dev)
2082 {
2083 	struct nouveau_drm *drm = nouveau_drm(dev);
2084 	struct nvbios *bios = &drm->vbios;
2085 	int ret;
2086 
2087 	/* only relevant for PCI devices */
2088 	if (!dev_is_pci(dev->dev))
2089 		return 0;
2090 
2091 	if (!NVInitVBIOS(dev))
2092 		return -ENODEV;
2093 
2094 	ret = parse_dcb_table(dev, bios);
2095 	if (ret)
2096 		return ret;
2097 
2098 	if (!bios->major_version)	/* we don't run version 0 bios */
2099 		return 0;
2100 
2101 	/* init script execution disabled */
2102 	bios->execute = false;
2103 
2104 	/* ... unless card isn't POSTed already */
2105 	if (!nouveau_bios_posted(dev)) {
2106 		NV_INFO(drm, "Adaptor not initialised, "
2107 			"running VBIOS init tables.\n");
2108 		bios->execute = true;
2109 	}
2110 
2111 	ret = nouveau_run_vbios_init(dev);
2112 	if (ret)
2113 		return ret;
2114 
2115 	/* feature_byte on BMP is poor, but init always sets CR4B */
2116 	if (bios->major_version < 5)
2117 		bios->is_mobile = NVReadVgaCrtc(dev, 0, NV_CIO_CRE_4B) & 0x40;
2118 
2119 	/* all BIT systems need p_f_m_t for digital_min_front_porch */
2120 	if (bios->is_mobile || bios->major_version >= 5)
2121 		ret = parse_fp_mode_table(dev, bios);
2122 
2123 	/* allow subsequent scripts to execute */
2124 	bios->execute = true;
2125 
2126 	return 0;
2127 }
2128 
2129 void
2130 nouveau_bios_takedown(struct drm_device *dev)
2131 {
2132 }
2133