xref: /dflybsd-src/sys/dev/drm/i915/intel_ddi.c (revision 31c068aaf635ad9fa72dbc4c65b32d890ff7544d)
1 /*
2  * Copyright © 2012 Intel Corporation
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a
5  * copy of this software and associated documentation files (the "Software"),
6  * to deal in the Software without restriction, including without limitation
7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8  * and/or sell copies of the Software, and to permit persons to whom the
9  * Software is furnished to do so, subject to the following conditions:
10  *
11  * The above copyright notice and this permission notice (including the next
12  * paragraph) shall be included in all copies or substantial portions of the
13  * Software.
14  *
15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21  * IN THE SOFTWARE.
22  *
23  * Authors:
24  *    Eugeni Dodonov <eugeni.dodonov@intel.com>
25  *
26  */
27 
28 #include <drm/drmP.h>
29 #include <drm/i915_drm.h>
30 #include "i915_drv.h"
31 #include "intel_drv.h"
32 
33 /* HDMI/DVI modes ignore everything but the last 2 items. So we share
34  * them for both DP and FDI transports, allowing those ports to
35  * automatically adapt to HDMI connections as well
36  */
37 static const u32 hsw_ddi_translations_dp[] = {
38 	0x00FFFFFF, 0x0006000E,		/* DP parameters */
39 	0x00D75FFF, 0x0005000A,
40 	0x00C30FFF, 0x00040006,
41 	0x80AAAFFF, 0x000B0000,
42 	0x00FFFFFF, 0x0005000A,
43 	0x00D75FFF, 0x000C0004,
44 	0x80C30FFF, 0x000B0000,
45 	0x00FFFFFF, 0x00040006,
46 	0x80D75FFF, 0x000B0000,
47 	0x00FFFFFF, 0x00040006		/* HDMI parameters */
48 };
49 
50 static const u32 hsw_ddi_translations_fdi[] = {
51 	0x00FFFFFF, 0x0007000E,		/* FDI parameters */
52 	0x00D75FFF, 0x000F000A,
53 	0x00C30FFF, 0x00060006,
54 	0x00AAAFFF, 0x001E0000,
55 	0x00FFFFFF, 0x000F000A,
56 	0x00D75FFF, 0x00160004,
57 	0x00C30FFF, 0x001E0000,
58 	0x00FFFFFF, 0x00060006,
59 	0x00D75FFF, 0x001E0000,
60 	0x00FFFFFF, 0x00040006		/* HDMI parameters */
61 };
62 
63 static enum port intel_ddi_get_encoder_port(struct intel_encoder *intel_encoder)
64 {
65 	struct drm_encoder *encoder = &intel_encoder->base;
66 	int type = intel_encoder->type;
67 
68 	if (type == INTEL_OUTPUT_DISPLAYPORT || type == INTEL_OUTPUT_EDP ||
69 	    type == INTEL_OUTPUT_HDMI || type == INTEL_OUTPUT_UNKNOWN) {
70 		struct intel_digital_port *intel_dig_port =
71 			enc_to_dig_port(encoder);
72 		return intel_dig_port->port;
73 
74 	} else if (type == INTEL_OUTPUT_ANALOG) {
75 		return PORT_E;
76 
77 	} else {
78 		DRM_ERROR("Invalid DDI encoder type %d\n", type);
79 		BUG();
80 	}
81 }
82 
83 /* On Haswell, DDI port buffers must be programmed with correct values
84  * in advance. The buffer values are different for FDI and DP modes,
85  * but the HDMI/DVI fields are shared among those. So we program the DDI
86  * in either FDI or DP modes only, as HDMI connections will work with both
87  * of those
88  */
89 static void intel_prepare_ddi_buffers(struct drm_device *dev, enum port port, bool use_fdi_mode)
90 {
91 	struct drm_i915_private *dev_priv = dev->dev_private;
92 	u32 reg;
93 	int i;
94 	const u32 *ddi_translations = ((use_fdi_mode) ?
95 		hsw_ddi_translations_fdi :
96 		hsw_ddi_translations_dp);
97 
98 	DRM_DEBUG_DRIVER("Initializing DDI buffers for port %c in %s mode\n",
99 			port_name(port),
100 			use_fdi_mode ? "FDI" : "DP");
101 
102 	WARN((use_fdi_mode && (port != PORT_E)),
103 		"Programming port %c in FDI mode, this probably will not work.\n",
104 		port_name(port));
105 
106 	for (i=0, reg=DDI_BUF_TRANS(port); i < ARRAY_SIZE(hsw_ddi_translations_fdi); i++) {
107 		I915_WRITE(reg, ddi_translations[i]);
108 		reg += 4;
109 	}
110 }
111 
112 /* Program DDI buffers translations for DP. By default, program ports A-D in DP
113  * mode and port E for FDI.
114  */
115 void intel_prepare_ddi(struct drm_device *dev)
116 {
117 	int port;
118 
119 	if (!HAS_DDI(dev))
120 		return;
121 
122 	for (port = PORT_A; port < PORT_E; port++)
123 		intel_prepare_ddi_buffers(dev, port, false);
124 
125 	/* DDI E is the suggested one to work in FDI mode, so program is as such
126 	 * by default. It will have to be re-programmed in case a digital DP
127 	 * output will be detected on it
128 	 */
129 	intel_prepare_ddi_buffers(dev, PORT_E, true);
130 }
131 
132 static const long hsw_ddi_buf_ctl_values[] = {
133 	DDI_BUF_EMP_400MV_0DB_HSW,
134 	DDI_BUF_EMP_400MV_3_5DB_HSW,
135 	DDI_BUF_EMP_400MV_6DB_HSW,
136 	DDI_BUF_EMP_400MV_9_5DB_HSW,
137 	DDI_BUF_EMP_600MV_0DB_HSW,
138 	DDI_BUF_EMP_600MV_3_5DB_HSW,
139 	DDI_BUF_EMP_600MV_6DB_HSW,
140 	DDI_BUF_EMP_800MV_0DB_HSW,
141 	DDI_BUF_EMP_800MV_3_5DB_HSW
142 };
143 
144 static void intel_wait_ddi_buf_idle(struct drm_i915_private *dev_priv,
145 				    enum port port)
146 {
147 	uint32_t reg = DDI_BUF_CTL(port);
148 	int i;
149 
150 	for (i = 0; i < 8; i++) {
151 		udelay(1);
152 		if (I915_READ(reg) & DDI_BUF_IS_IDLE)
153 			return;
154 	}
155 	DRM_ERROR("Timeout waiting for DDI BUF %c idle bit\n", port_name(port));
156 }
157 
158 /* Starting with Haswell, different DDI ports can work in FDI mode for
159  * connection to the PCH-located connectors. For this, it is necessary to train
160  * both the DDI port and PCH receiver for the desired DDI buffer settings.
161  *
162  * The recommended port to work in FDI mode is DDI E, which we use here. Also,
163  * please note that when FDI mode is active on DDI E, it shares 2 lines with
164  * DDI A (which is used for eDP)
165  */
166 
167 void hsw_fdi_link_train(struct drm_crtc *crtc)
168 {
169 	struct drm_device *dev = crtc->dev;
170 	struct drm_i915_private *dev_priv = dev->dev_private;
171 	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
172 	u32 temp, i, rx_ctl_val;
173 
174 	/* Set the FDI_RX_MISC pwrdn lanes and the 2 workarounds listed at the
175 	 * mode set "sequence for CRT port" document:
176 	 * - TP1 to TP2 time with the default value
177 	 * - FDI delay to 90h
178 	 */
179 	I915_WRITE(_FDI_RXA_MISC, FDI_RX_PWRDN_LANE1_VAL(2) |
180 				  FDI_RX_PWRDN_LANE0_VAL(2) |
181 				  FDI_RX_TP1_TO_TP2_48 | FDI_RX_FDI_DELAY_90);
182 
183 	/* Enable the PCH Receiver FDI PLL */
184 	rx_ctl_val = dev_priv->fdi_rx_config | FDI_RX_ENHANCE_FRAME_ENABLE |
185 		     FDI_RX_PLL_ENABLE | ((intel_crtc->fdi_lanes - 1) << 19);
186 	I915_WRITE(_FDI_RXA_CTL, rx_ctl_val);
187 	POSTING_READ(_FDI_RXA_CTL);
188 	udelay(220);
189 
190 	/* Switch from Rawclk to PCDclk */
191 	rx_ctl_val |= FDI_PCDCLK;
192 	I915_WRITE(_FDI_RXA_CTL, rx_ctl_val);
193 
194 	/* Configure Port Clock Select */
195 	I915_WRITE(PORT_CLK_SEL(PORT_E), intel_crtc->ddi_pll_sel);
196 
197 	/* Start the training iterating through available voltages and emphasis,
198 	 * testing each value twice. */
199 	for (i = 0; i < ARRAY_SIZE(hsw_ddi_buf_ctl_values) * 2; i++) {
200 		/* Configure DP_TP_CTL with auto-training */
201 		I915_WRITE(DP_TP_CTL(PORT_E),
202 					DP_TP_CTL_FDI_AUTOTRAIN |
203 					DP_TP_CTL_ENHANCED_FRAME_ENABLE |
204 					DP_TP_CTL_LINK_TRAIN_PAT1 |
205 					DP_TP_CTL_ENABLE);
206 
207 		/* Configure and enable DDI_BUF_CTL for DDI E with next voltage.
208 		 * DDI E does not support port reversal, the functionality is
209 		 * achieved on the PCH side in FDI_RX_CTL, so no need to set the
210 		 * port reversal bit */
211 		I915_WRITE(DDI_BUF_CTL(PORT_E),
212 			   DDI_BUF_CTL_ENABLE |
213 			   ((intel_crtc->fdi_lanes - 1) << 1) |
214 			   hsw_ddi_buf_ctl_values[i / 2]);
215 		POSTING_READ(DDI_BUF_CTL(PORT_E));
216 
217 		udelay(600);
218 
219 		/* Program PCH FDI Receiver TU */
220 		I915_WRITE(_FDI_RXA_TUSIZE1, TU_SIZE(64));
221 
222 		/* Enable PCH FDI Receiver with auto-training */
223 		rx_ctl_val |= FDI_RX_ENABLE | FDI_LINK_TRAIN_AUTO;
224 		I915_WRITE(_FDI_RXA_CTL, rx_ctl_val);
225 		POSTING_READ(_FDI_RXA_CTL);
226 
227 		/* Wait for FDI receiver lane calibration */
228 		udelay(30);
229 
230 		/* Unset FDI_RX_MISC pwrdn lanes */
231 		temp = I915_READ(_FDI_RXA_MISC);
232 		temp &= ~(FDI_RX_PWRDN_LANE1_MASK | FDI_RX_PWRDN_LANE0_MASK);
233 		I915_WRITE(_FDI_RXA_MISC, temp);
234 		POSTING_READ(_FDI_RXA_MISC);
235 
236 		/* Wait for FDI auto training time */
237 		udelay(5);
238 
239 		temp = I915_READ(DP_TP_STATUS(PORT_E));
240 		if (temp & DP_TP_STATUS_AUTOTRAIN_DONE) {
241 			DRM_DEBUG_KMS("FDI link training done on step %d\n", i);
242 
243 			/* Enable normal pixel sending for FDI */
244 			I915_WRITE(DP_TP_CTL(PORT_E),
245 				   DP_TP_CTL_FDI_AUTOTRAIN |
246 				   DP_TP_CTL_LINK_TRAIN_NORMAL |
247 				   DP_TP_CTL_ENHANCED_FRAME_ENABLE |
248 				   DP_TP_CTL_ENABLE);
249 
250 			return;
251 		}
252 
253 		temp = I915_READ(DDI_BUF_CTL(PORT_E));
254 		temp &= ~DDI_BUF_CTL_ENABLE;
255 		I915_WRITE(DDI_BUF_CTL(PORT_E), temp);
256 		POSTING_READ(DDI_BUF_CTL(PORT_E));
257 
258 		/* Disable DP_TP_CTL and FDI_RX_CTL and retry */
259 		temp = I915_READ(DP_TP_CTL(PORT_E));
260 		temp &= ~(DP_TP_CTL_ENABLE | DP_TP_CTL_LINK_TRAIN_MASK);
261 		temp |= DP_TP_CTL_LINK_TRAIN_PAT1;
262 		I915_WRITE(DP_TP_CTL(PORT_E), temp);
263 		POSTING_READ(DP_TP_CTL(PORT_E));
264 
265 		intel_wait_ddi_buf_idle(dev_priv, PORT_E);
266 
267 		rx_ctl_val &= ~FDI_RX_ENABLE;
268 		I915_WRITE(_FDI_RXA_CTL, rx_ctl_val);
269 		POSTING_READ(_FDI_RXA_CTL);
270 
271 		/* Reset FDI_RX_MISC pwrdn lanes */
272 		temp = I915_READ(_FDI_RXA_MISC);
273 		temp &= ~(FDI_RX_PWRDN_LANE1_MASK | FDI_RX_PWRDN_LANE0_MASK);
274 		temp |= FDI_RX_PWRDN_LANE1_VAL(2) | FDI_RX_PWRDN_LANE0_VAL(2);
275 		I915_WRITE(_FDI_RXA_MISC, temp);
276 		POSTING_READ(_FDI_RXA_MISC);
277 	}
278 
279 	DRM_ERROR("FDI link training failed!\n");
280 }
281 
282 /* WRPLL clock dividers */
283 struct wrpll_tmds_clock {
284 	u32 clock;
285 	u16 p;		/* Post divider */
286 	u16 n2;		/* Feedback divider */
287 	u16 r2;		/* Reference divider */
288 };
289 
290 /* Table of matching values for WRPLL clocks programming for each frequency.
291  * The code assumes this table is sorted. */
292 static const struct wrpll_tmds_clock wrpll_tmds_clock_table[] = {
293 	{19750,	38,	25,	18},
294 	{20000,	48,	32,	18},
295 	{21000,	36,	21,	15},
296 	{21912,	42,	29,	17},
297 	{22000,	36,	22,	15},
298 	{23000,	36,	23,	15},
299 	{23500,	40,	40,	23},
300 	{23750,	26,	16,	14},
301 	{24000,	36,	24,	15},
302 	{25000,	36,	25,	15},
303 	{25175,	26,	40,	33},
304 	{25200,	30,	21,	15},
305 	{26000,	36,	26,	15},
306 	{27000,	30,	21,	14},
307 	{27027,	18,	100,	111},
308 	{27500,	30,	29,	19},
309 	{28000,	34,	30,	17},
310 	{28320,	26,	30,	22},
311 	{28322,	32,	42,	25},
312 	{28750,	24,	23,	18},
313 	{29000,	30,	29,	18},
314 	{29750,	32,	30,	17},
315 	{30000,	30,	25,	15},
316 	{30750,	30,	41,	24},
317 	{31000,	30,	31,	18},
318 	{31500,	30,	28,	16},
319 	{32000,	30,	32,	18},
320 	{32500,	28,	32,	19},
321 	{33000,	24,	22,	15},
322 	{34000,	28,	30,	17},
323 	{35000,	26,	32,	19},
324 	{35500,	24,	30,	19},
325 	{36000,	26,	26,	15},
326 	{36750,	26,	46,	26},
327 	{37000,	24,	23,	14},
328 	{37762,	22,	40,	26},
329 	{37800,	20,	21,	15},
330 	{38000,	24,	27,	16},
331 	{38250,	24,	34,	20},
332 	{39000,	24,	26,	15},
333 	{40000,	24,	32,	18},
334 	{40500,	20,	21,	14},
335 	{40541,	22,	147,	89},
336 	{40750,	18,	19,	14},
337 	{41000,	16,	17,	14},
338 	{41500,	22,	44,	26},
339 	{41540,	22,	44,	26},
340 	{42000,	18,	21,	15},
341 	{42500,	22,	45,	26},
342 	{43000,	20,	43,	27},
343 	{43163,	20,	24,	15},
344 	{44000,	18,	22,	15},
345 	{44900,	20,	108,	65},
346 	{45000,	20,	25,	15},
347 	{45250,	20,	52,	31},
348 	{46000,	18,	23,	15},
349 	{46750,	20,	45,	26},
350 	{47000,	20,	40,	23},
351 	{48000,	18,	24,	15},
352 	{49000,	18,	49,	30},
353 	{49500,	16,	22,	15},
354 	{50000,	18,	25,	15},
355 	{50500,	18,	32,	19},
356 	{51000,	18,	34,	20},
357 	{52000,	18,	26,	15},
358 	{52406,	14,	34,	25},
359 	{53000,	16,	22,	14},
360 	{54000,	16,	24,	15},
361 	{54054,	16,	173,	108},
362 	{54500,	14,	24,	17},
363 	{55000,	12,	22,	18},
364 	{56000,	14,	45,	31},
365 	{56250,	16,	25,	15},
366 	{56750,	14,	25,	17},
367 	{57000,	16,	27,	16},
368 	{58000,	16,	43,	25},
369 	{58250,	16,	38,	22},
370 	{58750,	16,	40,	23},
371 	{59000,	14,	26,	17},
372 	{59341,	14,	40,	26},
373 	{59400,	16,	44,	25},
374 	{60000,	16,	32,	18},
375 	{60500,	12,	39,	29},
376 	{61000,	14,	49,	31},
377 	{62000,	14,	37,	23},
378 	{62250,	14,	42,	26},
379 	{63000,	12,	21,	15},
380 	{63500,	14,	28,	17},
381 	{64000,	12,	27,	19},
382 	{65000,	14,	32,	19},
383 	{65250,	12,	29,	20},
384 	{65500,	12,	32,	22},
385 	{66000,	12,	22,	15},
386 	{66667,	14,	38,	22},
387 	{66750,	10,	21,	17},
388 	{67000,	14,	33,	19},
389 	{67750,	14,	58,	33},
390 	{68000,	14,	30,	17},
391 	{68179,	14,	46,	26},
392 	{68250,	14,	46,	26},
393 	{69000,	12,	23,	15},
394 	{70000,	12,	28,	18},
395 	{71000,	12,	30,	19},
396 	{72000,	12,	24,	15},
397 	{73000,	10,	23,	17},
398 	{74000,	12,	23,	14},
399 	{74176,	8,	100,	91},
400 	{74250,	10,	22,	16},
401 	{74481,	12,	43,	26},
402 	{74500,	10,	29,	21},
403 	{75000,	12,	25,	15},
404 	{75250,	10,	39,	28},
405 	{76000,	12,	27,	16},
406 	{77000,	12,	53,	31},
407 	{78000,	12,	26,	15},
408 	{78750,	12,	28,	16},
409 	{79000,	10,	38,	26},
410 	{79500,	10,	28,	19},
411 	{80000,	12,	32,	18},
412 	{81000,	10,	21,	14},
413 	{81081,	6,	100,	111},
414 	{81624,	8,	29,	24},
415 	{82000,	8,	17,	14},
416 	{83000,	10,	40,	26},
417 	{83950,	10,	28,	18},
418 	{84000,	10,	28,	18},
419 	{84750,	6,	16,	17},
420 	{85000,	6,	17,	18},
421 	{85250,	10,	30,	19},
422 	{85750,	10,	27,	17},
423 	{86000,	10,	43,	27},
424 	{87000,	10,	29,	18},
425 	{88000,	10,	44,	27},
426 	{88500,	10,	41,	25},
427 	{89000,	10,	28,	17},
428 	{89012,	6,	90,	91},
429 	{89100,	10,	33,	20},
430 	{90000,	10,	25,	15},
431 	{91000,	10,	32,	19},
432 	{92000,	10,	46,	27},
433 	{93000,	10,	31,	18},
434 	{94000,	10,	40,	23},
435 	{94500,	10,	28,	16},
436 	{95000,	10,	44,	25},
437 	{95654,	10,	39,	22},
438 	{95750,	10,	39,	22},
439 	{96000,	10,	32,	18},
440 	{97000,	8,	23,	16},
441 	{97750,	8,	42,	29},
442 	{98000,	8,	45,	31},
443 	{99000,	8,	22,	15},
444 	{99750,	8,	34,	23},
445 	{100000,	6,	20,	18},
446 	{100500,	6,	19,	17},
447 	{101000,	6,	37,	33},
448 	{101250,	8,	21,	14},
449 	{102000,	6,	17,	15},
450 	{102250,	6,	25,	22},
451 	{103000,	8,	29,	19},
452 	{104000,	8,	37,	24},
453 	{105000,	8,	28,	18},
454 	{106000,	8,	22,	14},
455 	{107000,	8,	46,	29},
456 	{107214,	8,	27,	17},
457 	{108000,	8,	24,	15},
458 	{108108,	8,	173,	108},
459 	{109000,	6,	23,	19},
460 	{110000,	6,	22,	18},
461 	{110013,	6,	22,	18},
462 	{110250,	8,	49,	30},
463 	{110500,	8,	36,	22},
464 	{111000,	8,	23,	14},
465 	{111264,	8,	150,	91},
466 	{111375,	8,	33,	20},
467 	{112000,	8,	63,	38},
468 	{112500,	8,	25,	15},
469 	{113100,	8,	57,	34},
470 	{113309,	8,	42,	25},
471 	{114000,	8,	27,	16},
472 	{115000,	6,	23,	18},
473 	{116000,	8,	43,	25},
474 	{117000,	8,	26,	15},
475 	{117500,	8,	40,	23},
476 	{118000,	6,	38,	29},
477 	{119000,	8,	30,	17},
478 	{119500,	8,	46,	26},
479 	{119651,	8,	39,	22},
480 	{120000,	8,	32,	18},
481 	{121000,	6,	39,	29},
482 	{121250,	6,	31,	23},
483 	{121750,	6,	23,	17},
484 	{122000,	6,	42,	31},
485 	{122614,	6,	30,	22},
486 	{123000,	6,	41,	30},
487 	{123379,	6,	37,	27},
488 	{124000,	6,	51,	37},
489 	{125000,	6,	25,	18},
490 	{125250,	4,	13,	14},
491 	{125750,	4,	27,	29},
492 	{126000,	6,	21,	15},
493 	{127000,	6,	24,	17},
494 	{127250,	6,	41,	29},
495 	{128000,	6,	27,	19},
496 	{129000,	6,	43,	30},
497 	{129859,	4,	25,	26},
498 	{130000,	6,	26,	18},
499 	{130250,	6,	42,	29},
500 	{131000,	6,	32,	22},
501 	{131500,	6,	38,	26},
502 	{131850,	6,	41,	28},
503 	{132000,	6,	22,	15},
504 	{132750,	6,	28,	19},
505 	{133000,	6,	34,	23},
506 	{133330,	6,	37,	25},
507 	{134000,	6,	61,	41},
508 	{135000,	6,	21,	14},
509 	{135250,	6,	167,	111},
510 	{136000,	6,	62,	41},
511 	{137000,	6,	35,	23},
512 	{138000,	6,	23,	15},
513 	{138500,	6,	40,	26},
514 	{138750,	6,	37,	24},
515 	{139000,	6,	34,	22},
516 	{139050,	6,	34,	22},
517 	{139054,	6,	34,	22},
518 	{140000,	6,	28,	18},
519 	{141000,	6,	36,	23},
520 	{141500,	6,	22,	14},
521 	{142000,	6,	30,	19},
522 	{143000,	6,	27,	17},
523 	{143472,	4,	17,	16},
524 	{144000,	6,	24,	15},
525 	{145000,	6,	29,	18},
526 	{146000,	6,	47,	29},
527 	{146250,	6,	26,	16},
528 	{147000,	6,	49,	30},
529 	{147891,	6,	23,	14},
530 	{148000,	6,	23,	14},
531 	{148250,	6,	28,	17},
532 	{148352,	4,	100,	91},
533 	{148500,	6,	33,	20},
534 	{149000,	6,	48,	29},
535 	{150000,	6,	25,	15},
536 	{151000,	4,	19,	17},
537 	{152000,	6,	27,	16},
538 	{152280,	6,	44,	26},
539 	{153000,	6,	34,	20},
540 	{154000,	6,	53,	31},
541 	{155000,	6,	31,	18},
542 	{155250,	6,	50,	29},
543 	{155750,	6,	45,	26},
544 	{156000,	6,	26,	15},
545 	{157000,	6,	61,	35},
546 	{157500,	6,	28,	16},
547 	{158000,	6,	65,	37},
548 	{158250,	6,	44,	25},
549 	{159000,	6,	53,	30},
550 	{159500,	6,	39,	22},
551 	{160000,	6,	32,	18},
552 	{161000,	4,	31,	26},
553 	{162000,	4,	18,	15},
554 	{162162,	4,	131,	109},
555 	{162500,	4,	53,	44},
556 	{163000,	4,	29,	24},
557 	{164000,	4,	17,	14},
558 	{165000,	4,	22,	18},
559 	{166000,	4,	32,	26},
560 	{167000,	4,	26,	21},
561 	{168000,	4,	46,	37},
562 	{169000,	4,	104,	83},
563 	{169128,	4,	64,	51},
564 	{169500,	4,	39,	31},
565 	{170000,	4,	34,	27},
566 	{171000,	4,	19,	15},
567 	{172000,	4,	51,	40},
568 	{172750,	4,	32,	25},
569 	{172800,	4,	32,	25},
570 	{173000,	4,	41,	32},
571 	{174000,	4,	49,	38},
572 	{174787,	4,	22,	17},
573 	{175000,	4,	35,	27},
574 	{176000,	4,	30,	23},
575 	{177000,	4,	38,	29},
576 	{178000,	4,	29,	22},
577 	{178500,	4,	37,	28},
578 	{179000,	4,	53,	40},
579 	{179500,	4,	73,	55},
580 	{180000,	4,	20,	15},
581 	{181000,	4,	55,	41},
582 	{182000,	4,	31,	23},
583 	{183000,	4,	42,	31},
584 	{184000,	4,	30,	22},
585 	{184750,	4,	26,	19},
586 	{185000,	4,	37,	27},
587 	{186000,	4,	51,	37},
588 	{187000,	4,	36,	26},
589 	{188000,	4,	32,	23},
590 	{189000,	4,	21,	15},
591 	{190000,	4,	38,	27},
592 	{190960,	4,	41,	29},
593 	{191000,	4,	41,	29},
594 	{192000,	4,	27,	19},
595 	{192250,	4,	37,	26},
596 	{193000,	4,	20,	14},
597 	{193250,	4,	53,	37},
598 	{194000,	4,	23,	16},
599 	{194208,	4,	23,	16},
600 	{195000,	4,	26,	18},
601 	{196000,	4,	45,	31},
602 	{197000,	4,	35,	24},
603 	{197750,	4,	41,	28},
604 	{198000,	4,	22,	15},
605 	{198500,	4,	25,	17},
606 	{199000,	4,	28,	19},
607 	{200000,	4,	37,	25},
608 	{201000,	4,	61,	41},
609 	{202000,	4,	112,	75},
610 	{202500,	4,	21,	14},
611 	{203000,	4,	146,	97},
612 	{204000,	4,	62,	41},
613 	{204750,	4,	44,	29},
614 	{205000,	4,	38,	25},
615 	{206000,	4,	29,	19},
616 	{207000,	4,	23,	15},
617 	{207500,	4,	40,	26},
618 	{208000,	4,	37,	24},
619 	{208900,	4,	48,	31},
620 	{209000,	4,	48,	31},
621 	{209250,	4,	31,	20},
622 	{210000,	4,	28,	18},
623 	{211000,	4,	25,	16},
624 	{212000,	4,	22,	14},
625 	{213000,	4,	30,	19},
626 	{213750,	4,	38,	24},
627 	{214000,	4,	46,	29},
628 	{214750,	4,	35,	22},
629 	{215000,	4,	43,	27},
630 	{216000,	4,	24,	15},
631 	{217000,	4,	37,	23},
632 	{218000,	4,	42,	26},
633 	{218250,	4,	42,	26},
634 	{218750,	4,	34,	21},
635 	{219000,	4,	47,	29},
636 	{220000,	4,	44,	27},
637 	{220640,	4,	49,	30},
638 	{220750,	4,	36,	22},
639 	{221000,	4,	36,	22},
640 	{222000,	4,	23,	14},
641 	{222525,	4,	28,	17},
642 	{222750,	4,	33,	20},
643 	{227000,	4,	37,	22},
644 	{230250,	4,	29,	17},
645 	{233500,	4,	38,	22},
646 	{235000,	4,	40,	23},
647 	{238000,	4,	30,	17},
648 	{241500,	2,	17,	19},
649 	{245250,	2,	20,	22},
650 	{247750,	2,	22,	24},
651 	{253250,	2,	15,	16},
652 	{256250,	2,	18,	19},
653 	{262500,	2,	31,	32},
654 	{267250,	2,	66,	67},
655 	{268500,	2,	94,	95},
656 	{270000,	2,	14,	14},
657 	{272500,	2,	77,	76},
658 	{273750,	2,	57,	56},
659 	{280750,	2,	24,	23},
660 	{281250,	2,	23,	22},
661 	{286000,	2,	17,	16},
662 	{291750,	2,	26,	24},
663 	{296703,	2,	56,	51},
664 	{297000,	2,	22,	20},
665 	{298000,	2,	21,	19},
666 };
667 
668 static void intel_ddi_mode_set(struct drm_encoder *encoder,
669 			       struct drm_display_mode *mode,
670 			       struct drm_display_mode *adjusted_mode)
671 {
672 	struct drm_crtc *crtc = encoder->crtc;
673 	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
674 	struct intel_encoder *intel_encoder = to_intel_encoder(encoder);
675 	int port = intel_ddi_get_encoder_port(intel_encoder);
676 	int pipe = intel_crtc->pipe;
677 	int type = intel_encoder->type;
678 
679 	DRM_DEBUG_KMS("Preparing DDI mode for Haswell on port %c, pipe %c\n",
680 		      port_name(port), pipe_name(pipe));
681 
682 	intel_crtc->eld_vld = false;
683 	if (type == INTEL_OUTPUT_DISPLAYPORT || type == INTEL_OUTPUT_EDP) {
684 		struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
685 		struct intel_digital_port *intel_dig_port =
686 			enc_to_dig_port(encoder);
687 
688 		intel_dp->DP = intel_dig_port->port_reversal |
689 			       DDI_BUF_CTL_ENABLE | DDI_BUF_EMP_400MV_0DB_HSW;
690 		switch (intel_dp->lane_count) {
691 		case 1:
692 			intel_dp->DP |= DDI_PORT_WIDTH_X1;
693 			break;
694 		case 2:
695 			intel_dp->DP |= DDI_PORT_WIDTH_X2;
696 			break;
697 		case 4:
698 			intel_dp->DP |= DDI_PORT_WIDTH_X4;
699 			break;
700 		default:
701 			intel_dp->DP |= DDI_PORT_WIDTH_X4;
702 			WARN(1, "Unexpected DP lane count %d\n",
703 			     intel_dp->lane_count);
704 			break;
705 		}
706 
707 		if (intel_dp->has_audio) {
708 			DRM_DEBUG_DRIVER("DP audio on pipe %c on DDI\n",
709 					 pipe_name(intel_crtc->pipe));
710 
711 			/* write eld */
712 			DRM_DEBUG_DRIVER("DP audio: write eld information\n");
713 			intel_write_eld(encoder, adjusted_mode);
714 		}
715 
716 		intel_dp_init_link_config(intel_dp);
717 
718 	} else if (type == INTEL_OUTPUT_HDMI) {
719 		struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
720 
721 		if (intel_hdmi->has_audio) {
722 			/* Proper support for digital audio needs a new logic
723 			 * and a new set of registers, so we leave it for future
724 			 * patch bombing.
725 			 */
726 			DRM_DEBUG_DRIVER("HDMI audio on pipe %c on DDI\n",
727 					 pipe_name(intel_crtc->pipe));
728 
729 			/* write eld */
730 			DRM_DEBUG_DRIVER("HDMI audio: write eld information\n");
731 			intel_write_eld(encoder, adjusted_mode);
732 		}
733 
734 		intel_hdmi->set_infoframes(encoder, adjusted_mode);
735 	}
736 }
737 
738 static struct intel_encoder *
739 intel_ddi_get_crtc_encoder(struct drm_crtc *crtc)
740 {
741 	struct drm_device *dev = crtc->dev;
742 	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
743 	struct intel_encoder *intel_encoder, *ret = NULL;
744 	int num_encoders = 0;
745 
746 	for_each_encoder_on_crtc(dev, crtc, intel_encoder) {
747 		ret = intel_encoder;
748 		num_encoders++;
749 	}
750 
751 	if (num_encoders != 1)
752 		WARN(1, "%d encoders on crtc for pipe %d\n", num_encoders,
753 		     intel_crtc->pipe);
754 
755 	BUG_ON(ret == NULL);
756 	return ret;
757 }
758 
759 void intel_ddi_put_crtc_pll(struct drm_crtc *crtc)
760 {
761 	struct drm_i915_private *dev_priv = crtc->dev->dev_private;
762 	struct intel_ddi_plls *plls = &dev_priv->ddi_plls;
763 	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
764 	uint32_t val;
765 
766 	switch (intel_crtc->ddi_pll_sel) {
767 	case PORT_CLK_SEL_SPLL:
768 		plls->spll_refcount--;
769 		if (plls->spll_refcount == 0) {
770 			DRM_DEBUG_KMS("Disabling SPLL\n");
771 			val = I915_READ(SPLL_CTL);
772 			WARN_ON(!(val & SPLL_PLL_ENABLE));
773 			I915_WRITE(SPLL_CTL, val & ~SPLL_PLL_ENABLE);
774 			POSTING_READ(SPLL_CTL);
775 		}
776 		break;
777 	case PORT_CLK_SEL_WRPLL1:
778 		plls->wrpll1_refcount--;
779 		if (plls->wrpll1_refcount == 0) {
780 			DRM_DEBUG_KMS("Disabling WRPLL 1\n");
781 			val = I915_READ(WRPLL_CTL1);
782 			WARN_ON(!(val & WRPLL_PLL_ENABLE));
783 			I915_WRITE(WRPLL_CTL1, val & ~WRPLL_PLL_ENABLE);
784 			POSTING_READ(WRPLL_CTL1);
785 		}
786 		break;
787 	case PORT_CLK_SEL_WRPLL2:
788 		plls->wrpll2_refcount--;
789 		if (plls->wrpll2_refcount == 0) {
790 			DRM_DEBUG_KMS("Disabling WRPLL 2\n");
791 			val = I915_READ(WRPLL_CTL2);
792 			WARN_ON(!(val & WRPLL_PLL_ENABLE));
793 			I915_WRITE(WRPLL_CTL2, val & ~WRPLL_PLL_ENABLE);
794 			POSTING_READ(WRPLL_CTL2);
795 		}
796 		break;
797 	}
798 
799 	WARN(plls->spll_refcount < 0, "Invalid SPLL refcount\n");
800 	WARN(plls->wrpll1_refcount < 0, "Invalid WRPLL1 refcount\n");
801 	WARN(plls->wrpll2_refcount < 0, "Invalid WRPLL2 refcount\n");
802 
803 	intel_crtc->ddi_pll_sel = PORT_CLK_SEL_NONE;
804 }
805 
806 static void intel_ddi_calculate_wrpll(int clock, int *p, int *n2, int *r2)
807 {
808 	u32 i;
809 
810 	for (i = 0; i < ARRAY_SIZE(wrpll_tmds_clock_table); i++)
811 		if (clock <= wrpll_tmds_clock_table[i].clock)
812 			break;
813 
814 	if (i == ARRAY_SIZE(wrpll_tmds_clock_table))
815 		i--;
816 
817 	*p = wrpll_tmds_clock_table[i].p;
818 	*n2 = wrpll_tmds_clock_table[i].n2;
819 	*r2 = wrpll_tmds_clock_table[i].r2;
820 
821 	if (wrpll_tmds_clock_table[i].clock != clock)
822 		DRM_INFO("WRPLL: using settings for %dKHz on %dKHz mode\n",
823 			 wrpll_tmds_clock_table[i].clock, clock);
824 
825 	DRM_DEBUG_KMS("WRPLL: %dKHz refresh rate with p=%d, n2=%d r2=%d\n",
826 		      clock, *p, *n2, *r2);
827 }
828 
829 bool intel_ddi_pll_mode_set(struct drm_crtc *crtc, int clock)
830 {
831 	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
832 	struct intel_encoder *intel_encoder = intel_ddi_get_crtc_encoder(crtc);
833 	struct drm_encoder *encoder = &intel_encoder->base;
834 	struct drm_i915_private *dev_priv = crtc->dev->dev_private;
835 	struct intel_ddi_plls *plls = &dev_priv->ddi_plls;
836 	int type = intel_encoder->type;
837 	enum i915_pipe pipe = intel_crtc->pipe;
838 	uint32_t reg, val;
839 
840 	/* TODO: reuse PLLs when possible (compare values) */
841 
842 	intel_ddi_put_crtc_pll(crtc);
843 
844 	if (type == INTEL_OUTPUT_DISPLAYPORT || type == INTEL_OUTPUT_EDP) {
845 		struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
846 
847 		switch (intel_dp->link_bw) {
848 		case DP_LINK_BW_1_62:
849 			intel_crtc->ddi_pll_sel = PORT_CLK_SEL_LCPLL_810;
850 			break;
851 		case DP_LINK_BW_2_7:
852 			intel_crtc->ddi_pll_sel = PORT_CLK_SEL_LCPLL_1350;
853 			break;
854 		case DP_LINK_BW_5_4:
855 			intel_crtc->ddi_pll_sel = PORT_CLK_SEL_LCPLL_2700;
856 			break;
857 		default:
858 			DRM_ERROR("Link bandwidth %d unsupported\n",
859 				  intel_dp->link_bw);
860 			return false;
861 		}
862 
863 		/* We don't need to turn any PLL on because we'll use LCPLL. */
864 		return true;
865 
866 	} else if (type == INTEL_OUTPUT_HDMI) {
867 		int p, n2, r2;
868 
869 		if (plls->wrpll1_refcount == 0) {
870 			DRM_DEBUG_KMS("Using WRPLL 1 on pipe %c\n",
871 				      pipe_name(pipe));
872 			plls->wrpll1_refcount++;
873 			reg = WRPLL_CTL1;
874 			intel_crtc->ddi_pll_sel = PORT_CLK_SEL_WRPLL1;
875 		} else if (plls->wrpll2_refcount == 0) {
876 			DRM_DEBUG_KMS("Using WRPLL 2 on pipe %c\n",
877 				      pipe_name(pipe));
878 			plls->wrpll2_refcount++;
879 			reg = WRPLL_CTL2;
880 			intel_crtc->ddi_pll_sel = PORT_CLK_SEL_WRPLL2;
881 		} else {
882 			DRM_ERROR("No WRPLLs available!\n");
883 			return false;
884 		}
885 
886 		WARN(I915_READ(reg) & WRPLL_PLL_ENABLE,
887 		     "WRPLL already enabled\n");
888 
889 		intel_ddi_calculate_wrpll(clock, &p, &n2, &r2);
890 
891 		val = WRPLL_PLL_ENABLE | WRPLL_PLL_SELECT_LCPLL_2700 |
892 		      WRPLL_DIVIDER_REFERENCE(r2) | WRPLL_DIVIDER_FEEDBACK(n2) |
893 		      WRPLL_DIVIDER_POST(p);
894 
895 	} else if (type == INTEL_OUTPUT_ANALOG) {
896 		if (plls->spll_refcount == 0) {
897 			DRM_DEBUG_KMS("Using SPLL on pipe %c\n",
898 				      pipe_name(pipe));
899 			plls->spll_refcount++;
900 			reg = SPLL_CTL;
901 			intel_crtc->ddi_pll_sel = PORT_CLK_SEL_SPLL;
902 		}
903 
904 		WARN(I915_READ(reg) & SPLL_PLL_ENABLE,
905 		     "SPLL already enabled\n");
906 
907 		val = SPLL_PLL_ENABLE | SPLL_PLL_FREQ_1350MHz | SPLL_PLL_SSC;
908 
909 	} else {
910 		WARN(1, "Invalid DDI encoder type %d\n", type);
911 		return false;
912 	}
913 
914 	I915_WRITE(reg, val);
915 	udelay(20);
916 
917 	return true;
918 }
919 
920 void intel_ddi_set_pipe_settings(struct drm_crtc *crtc)
921 {
922 	struct drm_i915_private *dev_priv = crtc->dev->dev_private;
923 	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
924 	struct intel_encoder *intel_encoder = intel_ddi_get_crtc_encoder(crtc);
925 	enum transcoder cpu_transcoder = intel_crtc->cpu_transcoder;
926 	int type = intel_encoder->type;
927 	uint32_t temp;
928 
929 	if (type == INTEL_OUTPUT_DISPLAYPORT || type == INTEL_OUTPUT_EDP) {
930 
931 		temp = TRANS_MSA_SYNC_CLK;
932 		switch (intel_crtc->bpp) {
933 		case 18:
934 			temp |= TRANS_MSA_6_BPC;
935 			break;
936 		case 24:
937 			temp |= TRANS_MSA_8_BPC;
938 			break;
939 		case 30:
940 			temp |= TRANS_MSA_10_BPC;
941 			break;
942 		case 36:
943 			temp |= TRANS_MSA_12_BPC;
944 			break;
945 		default:
946 			temp |= TRANS_MSA_8_BPC;
947 			WARN(1, "%d bpp unsupported by DDI function\n",
948 			     intel_crtc->bpp);
949 		}
950 		I915_WRITE(TRANS_MSA_MISC(cpu_transcoder), temp);
951 	}
952 }
953 
954 void intel_ddi_enable_pipe_func(struct drm_crtc *crtc)
955 {
956 	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
957 	struct intel_encoder *intel_encoder = intel_ddi_get_crtc_encoder(crtc);
958 	struct drm_encoder *encoder = &intel_encoder->base;
959 	struct drm_i915_private *dev_priv = crtc->dev->dev_private;
960 	enum i915_pipe pipe = intel_crtc->pipe;
961 	enum transcoder cpu_transcoder = intel_crtc->cpu_transcoder;
962 	enum port port = intel_ddi_get_encoder_port(intel_encoder);
963 	int type = intel_encoder->type;
964 	uint32_t temp;
965 
966 	/* Enable TRANS_DDI_FUNC_CTL for the pipe to work in HDMI mode */
967 	temp = TRANS_DDI_FUNC_ENABLE;
968 	temp |= TRANS_DDI_SELECT_PORT(port);
969 
970 	switch (intel_crtc->bpp) {
971 	case 18:
972 		temp |= TRANS_DDI_BPC_6;
973 		break;
974 	case 24:
975 		temp |= TRANS_DDI_BPC_8;
976 		break;
977 	case 30:
978 		temp |= TRANS_DDI_BPC_10;
979 		break;
980 	case 36:
981 		temp |= TRANS_DDI_BPC_12;
982 		break;
983 	default:
984 		WARN(1, "%d bpp unsupported by transcoder DDI function\n",
985 		     intel_crtc->bpp);
986 	}
987 
988 	if (crtc->mode.flags & DRM_MODE_FLAG_PVSYNC)
989 		temp |= TRANS_DDI_PVSYNC;
990 	if (crtc->mode.flags & DRM_MODE_FLAG_PHSYNC)
991 		temp |= TRANS_DDI_PHSYNC;
992 
993 	if (cpu_transcoder == TRANSCODER_EDP) {
994 		switch (pipe) {
995 		case PIPE_A:
996 			/* Can only use the always-on power well for eDP when
997 			 * not using the panel fitter, and when not using motion
998 			  * blur mitigation (which we don't support). */
999 			if (dev_priv->pch_pf_size)
1000 				temp |= TRANS_DDI_EDP_INPUT_A_ONOFF;
1001 			else
1002 				temp |= TRANS_DDI_EDP_INPUT_A_ON;
1003 			break;
1004 		case PIPE_B:
1005 			temp |= TRANS_DDI_EDP_INPUT_B_ONOFF;
1006 			break;
1007 		case PIPE_C:
1008 			temp |= TRANS_DDI_EDP_INPUT_C_ONOFF;
1009 			break;
1010 		default:
1011 			BUG();
1012 			break;
1013 		}
1014 	}
1015 
1016 	if (type == INTEL_OUTPUT_HDMI) {
1017 		struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
1018 
1019 		if (intel_hdmi->has_hdmi_sink)
1020 			temp |= TRANS_DDI_MODE_SELECT_HDMI;
1021 		else
1022 			temp |= TRANS_DDI_MODE_SELECT_DVI;
1023 
1024 	} else if (type == INTEL_OUTPUT_ANALOG) {
1025 		temp |= TRANS_DDI_MODE_SELECT_FDI;
1026 		temp |= (intel_crtc->fdi_lanes - 1) << 1;
1027 
1028 	} else if (type == INTEL_OUTPUT_DISPLAYPORT ||
1029 		   type == INTEL_OUTPUT_EDP) {
1030 		struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
1031 
1032 		temp |= TRANS_DDI_MODE_SELECT_DP_SST;
1033 
1034 		switch (intel_dp->lane_count) {
1035 		case 1:
1036 			temp |= TRANS_DDI_PORT_WIDTH_X1;
1037 			break;
1038 		case 2:
1039 			temp |= TRANS_DDI_PORT_WIDTH_X2;
1040 			break;
1041 		case 4:
1042 			temp |= TRANS_DDI_PORT_WIDTH_X4;
1043 			break;
1044 		default:
1045 			temp |= TRANS_DDI_PORT_WIDTH_X4;
1046 			WARN(1, "Unsupported lane count %d\n",
1047 			     intel_dp->lane_count);
1048 		}
1049 
1050 	} else {
1051 		WARN(1, "Invalid encoder type %d for pipe %d\n",
1052 		     intel_encoder->type, pipe);
1053 	}
1054 
1055 	I915_WRITE(TRANS_DDI_FUNC_CTL(cpu_transcoder), temp);
1056 }
1057 
1058 void intel_ddi_disable_transcoder_func(struct drm_i915_private *dev_priv,
1059 				       enum transcoder cpu_transcoder)
1060 {
1061 	uint32_t reg = TRANS_DDI_FUNC_CTL(cpu_transcoder);
1062 	uint32_t val = I915_READ(reg);
1063 
1064 	val &= ~(TRANS_DDI_FUNC_ENABLE | TRANS_DDI_PORT_MASK);
1065 	val |= TRANS_DDI_PORT_NONE;
1066 	I915_WRITE(reg, val);
1067 }
1068 
1069 bool intel_ddi_connector_get_hw_state(struct intel_connector *intel_connector)
1070 {
1071 	struct drm_device *dev = intel_connector->base.dev;
1072 	struct drm_i915_private *dev_priv = dev->dev_private;
1073 	struct intel_encoder *intel_encoder = intel_connector->encoder;
1074 	int type = intel_connector->base.connector_type;
1075 	enum port port = intel_ddi_get_encoder_port(intel_encoder);
1076 	enum i915_pipe pipe = 0;
1077 	enum transcoder cpu_transcoder;
1078 	uint32_t tmp;
1079 
1080 	if (!intel_encoder->get_hw_state(intel_encoder, &pipe))
1081 		return false;
1082 
1083 	if (port == PORT_A)
1084 		cpu_transcoder = TRANSCODER_EDP;
1085 	else
1086 		cpu_transcoder = (enum transcoder) pipe;
1087 
1088 	tmp = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder));
1089 
1090 	switch (tmp & TRANS_DDI_MODE_SELECT_MASK) {
1091 	case TRANS_DDI_MODE_SELECT_HDMI:
1092 	case TRANS_DDI_MODE_SELECT_DVI:
1093 		return (type == DRM_MODE_CONNECTOR_HDMIA);
1094 
1095 	case TRANS_DDI_MODE_SELECT_DP_SST:
1096 		if (type == DRM_MODE_CONNECTOR_eDP)
1097 			return true;
1098 	case TRANS_DDI_MODE_SELECT_DP_MST:
1099 		return (type == DRM_MODE_CONNECTOR_DisplayPort);
1100 
1101 	case TRANS_DDI_MODE_SELECT_FDI:
1102 		return (type == DRM_MODE_CONNECTOR_VGA);
1103 
1104 	default:
1105 		return false;
1106 	}
1107 }
1108 
1109 bool intel_ddi_get_hw_state(struct intel_encoder *encoder,
1110 			    enum i915_pipe *pipe)
1111 {
1112 	struct drm_device *dev = encoder->base.dev;
1113 	struct drm_i915_private *dev_priv = dev->dev_private;
1114 	enum port port = intel_ddi_get_encoder_port(encoder);
1115 	u32 tmp;
1116 	int i;
1117 
1118 	tmp = I915_READ(DDI_BUF_CTL(port));
1119 
1120 	if (!(tmp & DDI_BUF_CTL_ENABLE))
1121 		return false;
1122 
1123 	if (port == PORT_A) {
1124 		tmp = I915_READ(TRANS_DDI_FUNC_CTL(TRANSCODER_EDP));
1125 
1126 		switch (tmp & TRANS_DDI_EDP_INPUT_MASK) {
1127 		case TRANS_DDI_EDP_INPUT_A_ON:
1128 		case TRANS_DDI_EDP_INPUT_A_ONOFF:
1129 			*pipe = PIPE_A;
1130 			break;
1131 		case TRANS_DDI_EDP_INPUT_B_ONOFF:
1132 			*pipe = PIPE_B;
1133 			break;
1134 		case TRANS_DDI_EDP_INPUT_C_ONOFF:
1135 			*pipe = PIPE_C;
1136 			break;
1137 		}
1138 
1139 		return true;
1140 	} else {
1141 		for (i = TRANSCODER_A; i <= TRANSCODER_C; i++) {
1142 			tmp = I915_READ(TRANS_DDI_FUNC_CTL(i));
1143 
1144 			if ((tmp & TRANS_DDI_PORT_MASK)
1145 			    == TRANS_DDI_SELECT_PORT(port)) {
1146 				*pipe = i;
1147 				return true;
1148 			}
1149 		}
1150 	}
1151 
1152 	DRM_DEBUG_KMS("No pipe for ddi port %i found\n", port);
1153 
1154 	return true;
1155 }
1156 
1157 static uint32_t intel_ddi_get_crtc_pll(struct drm_i915_private *dev_priv,
1158 				       enum i915_pipe pipe)
1159 {
1160 	uint32_t temp, ret;
1161 	enum port port = I915_MAX_PORTS;
1162 	enum transcoder cpu_transcoder = intel_pipe_to_cpu_transcoder(dev_priv,
1163 								      pipe);
1164 	int i;
1165 
1166 	if (cpu_transcoder == TRANSCODER_EDP) {
1167 		port = PORT_A;
1168 	} else {
1169 		temp = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder));
1170 		temp &= TRANS_DDI_PORT_MASK;
1171 
1172 		for (i = PORT_B; i <= PORT_E; i++)
1173 			if (temp == TRANS_DDI_SELECT_PORT(i))
1174 				port = i;
1175 	}
1176 
1177 	ret = I915_READ(PORT_CLK_SEL(port));
1178 
1179 	DRM_DEBUG_KMS("Pipe %c connected to port %c using clock 0x%08x\n",
1180 		      pipe_name(pipe), port_name(port), ret);
1181 
1182 	return ret;
1183 }
1184 
1185 void intel_ddi_setup_hw_pll_state(struct drm_device *dev)
1186 {
1187 	struct drm_i915_private *dev_priv = dev->dev_private;
1188 	enum i915_pipe pipe;
1189 	struct intel_crtc *intel_crtc;
1190 
1191 	for_each_pipe(pipe) {
1192 		intel_crtc =
1193 			to_intel_crtc(dev_priv->pipe_to_crtc_mapping[pipe]);
1194 
1195 		if (!intel_crtc->active)
1196 			continue;
1197 
1198 		intel_crtc->ddi_pll_sel = intel_ddi_get_crtc_pll(dev_priv,
1199 								 pipe);
1200 
1201 		switch (intel_crtc->ddi_pll_sel) {
1202 		case PORT_CLK_SEL_SPLL:
1203 			dev_priv->ddi_plls.spll_refcount++;
1204 			break;
1205 		case PORT_CLK_SEL_WRPLL1:
1206 			dev_priv->ddi_plls.wrpll1_refcount++;
1207 			break;
1208 		case PORT_CLK_SEL_WRPLL2:
1209 			dev_priv->ddi_plls.wrpll2_refcount++;
1210 			break;
1211 		}
1212 	}
1213 }
1214 
1215 void intel_ddi_enable_pipe_clock(struct intel_crtc *intel_crtc)
1216 {
1217 	struct drm_crtc *crtc = &intel_crtc->base;
1218 	struct drm_i915_private *dev_priv = crtc->dev->dev_private;
1219 	struct intel_encoder *intel_encoder = intel_ddi_get_crtc_encoder(crtc);
1220 	enum port port = intel_ddi_get_encoder_port(intel_encoder);
1221 	enum transcoder cpu_transcoder = intel_crtc->cpu_transcoder;
1222 
1223 	if (cpu_transcoder != TRANSCODER_EDP)
1224 		I915_WRITE(TRANS_CLK_SEL(cpu_transcoder),
1225 			   TRANS_CLK_SEL_PORT(port));
1226 }
1227 
1228 void intel_ddi_disable_pipe_clock(struct intel_crtc *intel_crtc)
1229 {
1230 	struct drm_i915_private *dev_priv = intel_crtc->base.dev->dev_private;
1231 	enum transcoder cpu_transcoder = intel_crtc->cpu_transcoder;
1232 
1233 	if (cpu_transcoder != TRANSCODER_EDP)
1234 		I915_WRITE(TRANS_CLK_SEL(cpu_transcoder),
1235 			   TRANS_CLK_SEL_DISABLED);
1236 }
1237 
1238 static void intel_ddi_pre_enable(struct intel_encoder *intel_encoder)
1239 {
1240 	struct drm_encoder *encoder = &intel_encoder->base;
1241 	struct drm_crtc *crtc = encoder->crtc;
1242 	struct drm_i915_private *dev_priv = encoder->dev->dev_private;
1243 	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
1244 	enum port port = intel_ddi_get_encoder_port(intel_encoder);
1245 	int type = intel_encoder->type;
1246 
1247 	if (type == INTEL_OUTPUT_EDP) {
1248 		struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
1249 		ironlake_edp_panel_vdd_on(intel_dp);
1250 		ironlake_edp_panel_on(intel_dp);
1251 		ironlake_edp_panel_vdd_off(intel_dp, true);
1252 	}
1253 
1254 	WARN_ON(intel_crtc->ddi_pll_sel == PORT_CLK_SEL_NONE);
1255 	I915_WRITE(PORT_CLK_SEL(port), intel_crtc->ddi_pll_sel);
1256 
1257 	if (type == INTEL_OUTPUT_DISPLAYPORT || type == INTEL_OUTPUT_EDP) {
1258 		struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
1259 
1260 		intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
1261 		intel_dp_start_link_train(intel_dp);
1262 		intel_dp_complete_link_train(intel_dp);
1263 	}
1264 }
1265 
1266 static void intel_ddi_post_disable(struct intel_encoder *intel_encoder)
1267 {
1268 	struct drm_encoder *encoder = &intel_encoder->base;
1269 	struct drm_i915_private *dev_priv = encoder->dev->dev_private;
1270 	enum port port = intel_ddi_get_encoder_port(intel_encoder);
1271 	int type = intel_encoder->type;
1272 	uint32_t val;
1273 	bool wait = false;
1274 
1275 	val = I915_READ(DDI_BUF_CTL(port));
1276 	if (val & DDI_BUF_CTL_ENABLE) {
1277 		val &= ~DDI_BUF_CTL_ENABLE;
1278 		I915_WRITE(DDI_BUF_CTL(port), val);
1279 		wait = true;
1280 	}
1281 
1282 	val = I915_READ(DP_TP_CTL(port));
1283 	val &= ~(DP_TP_CTL_ENABLE | DP_TP_CTL_LINK_TRAIN_MASK);
1284 	val |= DP_TP_CTL_LINK_TRAIN_PAT1;
1285 	I915_WRITE(DP_TP_CTL(port), val);
1286 
1287 	if (wait)
1288 		intel_wait_ddi_buf_idle(dev_priv, port);
1289 
1290 	if (type == INTEL_OUTPUT_EDP) {
1291 		struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
1292 		ironlake_edp_panel_vdd_on(intel_dp);
1293 		ironlake_edp_panel_off(intel_dp);
1294 	}
1295 
1296 	I915_WRITE(PORT_CLK_SEL(port), PORT_CLK_SEL_NONE);
1297 }
1298 
1299 static void intel_enable_ddi(struct intel_encoder *intel_encoder)
1300 {
1301 	struct drm_encoder *encoder = &intel_encoder->base;
1302 	struct drm_crtc *crtc = encoder->crtc;
1303 	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
1304 	int pipe = intel_crtc->pipe;
1305 	struct drm_device *dev = encoder->dev;
1306 	struct drm_i915_private *dev_priv = dev->dev_private;
1307 	enum port port = intel_ddi_get_encoder_port(intel_encoder);
1308 	int type = intel_encoder->type;
1309 	uint32_t tmp;
1310 
1311 	if (type == INTEL_OUTPUT_HDMI) {
1312 		struct intel_digital_port *intel_dig_port =
1313 			enc_to_dig_port(encoder);
1314 
1315 		/* In HDMI/DVI mode, the port width, and swing/emphasis values
1316 		 * are ignored so nothing special needs to be done besides
1317 		 * enabling the port.
1318 		 */
1319 		I915_WRITE(DDI_BUF_CTL(port),
1320 			   intel_dig_port->port_reversal | DDI_BUF_CTL_ENABLE);
1321 	} else if (type == INTEL_OUTPUT_EDP) {
1322 		struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
1323 
1324 		ironlake_edp_backlight_on(intel_dp);
1325 	}
1326 
1327 	if (intel_crtc->eld_vld) {
1328 		tmp = I915_READ(HSW_AUD_PIN_ELD_CP_VLD);
1329 		tmp |= ((AUDIO_OUTPUT_ENABLE_A | AUDIO_ELD_VALID_A) << (pipe * 4));
1330 		I915_WRITE(HSW_AUD_PIN_ELD_CP_VLD, tmp);
1331 	}
1332 }
1333 
1334 static void intel_disable_ddi(struct intel_encoder *intel_encoder)
1335 {
1336 	struct drm_encoder *encoder = &intel_encoder->base;
1337 	struct drm_crtc *crtc = encoder->crtc;
1338 	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
1339 	int pipe = intel_crtc->pipe;
1340 	int type = intel_encoder->type;
1341 	struct drm_device *dev = encoder->dev;
1342 	struct drm_i915_private *dev_priv = dev->dev_private;
1343 	uint32_t tmp;
1344 
1345 	if (type == INTEL_OUTPUT_EDP) {
1346 		struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
1347 
1348 		ironlake_edp_backlight_off(intel_dp);
1349 	}
1350 
1351 	tmp = I915_READ(HSW_AUD_PIN_ELD_CP_VLD);
1352 	tmp &= ~((AUDIO_OUTPUT_ENABLE_A | AUDIO_ELD_VALID_A) << (pipe * 4));
1353 	I915_WRITE(HSW_AUD_PIN_ELD_CP_VLD, tmp);
1354 }
1355 
1356 int intel_ddi_get_cdclk_freq(struct drm_i915_private *dev_priv)
1357 {
1358 	if (I915_READ(HSW_FUSE_STRAP) & HSW_CDCLK_LIMIT)
1359 		return 450;
1360 	else if ((I915_READ(LCPLL_CTL) & LCPLL_CLK_FREQ_MASK) ==
1361 		 LCPLL_CLK_FREQ_450)
1362 		return 450;
1363 	else if (IS_ULT(dev_priv->dev))
1364 		return 338;
1365 	else
1366 		return 540;
1367 }
1368 
1369 void intel_ddi_pll_init(struct drm_device *dev)
1370 {
1371 	struct drm_i915_private *dev_priv = dev->dev_private;
1372 	uint32_t val = I915_READ(LCPLL_CTL);
1373 
1374 	/* The LCPLL register should be turned on by the BIOS. For now let's
1375 	 * just check its state and print errors in case something is wrong.
1376 	 * Don't even try to turn it on.
1377 	 */
1378 
1379 	DRM_DEBUG_KMS("CDCLK running at %dMHz\n",
1380 		      intel_ddi_get_cdclk_freq(dev_priv));
1381 
1382 	if (val & LCPLL_CD_SOURCE_FCLK)
1383 		DRM_ERROR("CDCLK source is not LCPLL\n");
1384 
1385 	if (val & LCPLL_PLL_DISABLE)
1386 		DRM_ERROR("LCPLL is disabled\n");
1387 }
1388 
1389 void intel_ddi_prepare_link_retrain(struct drm_encoder *encoder)
1390 {
1391 	struct intel_digital_port *intel_dig_port = enc_to_dig_port(encoder);
1392 	struct intel_dp *intel_dp = &intel_dig_port->dp;
1393 	struct drm_i915_private *dev_priv = encoder->dev->dev_private;
1394 	enum port port = intel_dig_port->port;
1395 	uint32_t val;
1396 	bool wait = false;
1397 
1398 	if (I915_READ(DP_TP_CTL(port)) & DP_TP_CTL_ENABLE) {
1399 		val = I915_READ(DDI_BUF_CTL(port));
1400 		if (val & DDI_BUF_CTL_ENABLE) {
1401 			val &= ~DDI_BUF_CTL_ENABLE;
1402 			I915_WRITE(DDI_BUF_CTL(port), val);
1403 			wait = true;
1404 		}
1405 
1406 		val = I915_READ(DP_TP_CTL(port));
1407 		val &= ~(DP_TP_CTL_ENABLE | DP_TP_CTL_LINK_TRAIN_MASK);
1408 		val |= DP_TP_CTL_LINK_TRAIN_PAT1;
1409 		I915_WRITE(DP_TP_CTL(port), val);
1410 		POSTING_READ(DP_TP_CTL(port));
1411 
1412 		if (wait)
1413 			intel_wait_ddi_buf_idle(dev_priv, port);
1414 	}
1415 
1416 	val = DP_TP_CTL_ENABLE | DP_TP_CTL_MODE_SST |
1417 	      DP_TP_CTL_LINK_TRAIN_PAT1 | DP_TP_CTL_SCRAMBLE_DISABLE;
1418 	if (intel_dp->link_configuration[1] & DP_LANE_COUNT_ENHANCED_FRAME_EN)
1419 		val |= DP_TP_CTL_ENHANCED_FRAME_ENABLE;
1420 	I915_WRITE(DP_TP_CTL(port), val);
1421 	POSTING_READ(DP_TP_CTL(port));
1422 
1423 	intel_dp->DP |= DDI_BUF_CTL_ENABLE;
1424 	I915_WRITE(DDI_BUF_CTL(port), intel_dp->DP);
1425 	POSTING_READ(DDI_BUF_CTL(port));
1426 
1427 	udelay(600);
1428 }
1429 
1430 void intel_ddi_fdi_disable(struct drm_crtc *crtc)
1431 {
1432 	struct drm_i915_private *dev_priv = crtc->dev->dev_private;
1433 	struct intel_encoder *intel_encoder = intel_ddi_get_crtc_encoder(crtc);
1434 	uint32_t val;
1435 
1436 	intel_ddi_post_disable(intel_encoder);
1437 
1438 	val = I915_READ(_FDI_RXA_CTL);
1439 	val &= ~FDI_RX_ENABLE;
1440 	I915_WRITE(_FDI_RXA_CTL, val);
1441 
1442 	val = I915_READ(_FDI_RXA_MISC);
1443 	val &= ~(FDI_RX_PWRDN_LANE1_MASK | FDI_RX_PWRDN_LANE0_MASK);
1444 	val |= FDI_RX_PWRDN_LANE1_VAL(2) | FDI_RX_PWRDN_LANE0_VAL(2);
1445 	I915_WRITE(_FDI_RXA_MISC, val);
1446 
1447 	val = I915_READ(_FDI_RXA_CTL);
1448 	val &= ~FDI_PCDCLK;
1449 	I915_WRITE(_FDI_RXA_CTL, val);
1450 
1451 	val = I915_READ(_FDI_RXA_CTL);
1452 	val &= ~FDI_RX_PLL_ENABLE;
1453 	I915_WRITE(_FDI_RXA_CTL, val);
1454 }
1455 
1456 static void intel_ddi_hot_plug(struct intel_encoder *intel_encoder)
1457 {
1458 	struct intel_dp *intel_dp = enc_to_intel_dp(&intel_encoder->base);
1459 	int type = intel_encoder->type;
1460 
1461 	if (type == INTEL_OUTPUT_DISPLAYPORT || type == INTEL_OUTPUT_EDP)
1462 		intel_dp_check_link_status(intel_dp);
1463 }
1464 
1465 static void intel_ddi_destroy(struct drm_encoder *encoder)
1466 {
1467 	/* HDMI has nothing special to destroy, so we can go with this. */
1468 	intel_dp_encoder_destroy(encoder);
1469 }
1470 
1471 static bool intel_ddi_mode_fixup(struct drm_encoder *encoder,
1472 				 const struct drm_display_mode *mode,
1473 				 struct drm_display_mode *adjusted_mode)
1474 {
1475 	struct intel_encoder *intel_encoder = to_intel_encoder(encoder);
1476 	int type = intel_encoder->type;
1477 
1478 	WARN(type == INTEL_OUTPUT_UNKNOWN, "mode_fixup() on unknown output!\n");
1479 
1480 	if (type == INTEL_OUTPUT_HDMI)
1481 		return intel_hdmi_mode_fixup(encoder, mode, adjusted_mode);
1482 	else
1483 		return intel_dp_mode_fixup(encoder, mode, adjusted_mode);
1484 }
1485 
1486 static const struct drm_encoder_funcs intel_ddi_funcs = {
1487 	.destroy = intel_ddi_destroy,
1488 };
1489 
1490 static const struct drm_encoder_helper_funcs intel_ddi_helper_funcs = {
1491 	.mode_fixup = intel_ddi_mode_fixup,
1492 	.mode_set = intel_ddi_mode_set,
1493 	.disable = intel_encoder_noop,
1494 };
1495 
1496 void intel_ddi_init(struct drm_device *dev, enum port port)
1497 {
1498 	struct drm_i915_private *dev_priv = dev->dev_private;
1499 	struct intel_digital_port *intel_dig_port;
1500 	struct intel_encoder *intel_encoder;
1501 	struct drm_encoder *encoder;
1502 	struct intel_connector *hdmi_connector = NULL;
1503 	struct intel_connector *dp_connector = NULL;
1504 
1505 	intel_dig_port = kmalloc(sizeof(struct intel_digital_port),
1506 		M_DRM, M_WAITOK | M_ZERO);
1507 	if (!intel_dig_port)
1508 		return;
1509 
1510 	dp_connector = kmalloc(sizeof(struct intel_connector),
1511 		M_DRM, M_WAITOK | M_ZERO);
1512 	if (!dp_connector) {
1513 		kfree(intel_dig_port, M_DRM);
1514 		return;
1515 	}
1516 
1517 	if (port != PORT_A) {
1518 		hdmi_connector = kmalloc(sizeof(struct intel_connector),
1519 			M_DRM, M_WAITOK | M_ZERO);
1520 		if (!hdmi_connector) {
1521 			kfree(dp_connector, M_DRM);
1522 			kfree(intel_dig_port, M_DRM);
1523 			return;
1524 		}
1525 	}
1526 
1527 	intel_encoder = &intel_dig_port->base;
1528 	encoder = &intel_encoder->base;
1529 
1530 	drm_encoder_init(dev, encoder, &intel_ddi_funcs,
1531 			 DRM_MODE_ENCODER_TMDS);
1532 	drm_encoder_helper_add(encoder, &intel_ddi_helper_funcs);
1533 
1534 	intel_encoder->enable = intel_enable_ddi;
1535 	intel_encoder->pre_enable = intel_ddi_pre_enable;
1536 	intel_encoder->disable = intel_disable_ddi;
1537 	intel_encoder->post_disable = intel_ddi_post_disable;
1538 	intel_encoder->get_hw_state = intel_ddi_get_hw_state;
1539 
1540 	intel_dig_port->port = port;
1541 	intel_dig_port->port_reversal = I915_READ(DDI_BUF_CTL(port)) &
1542 					DDI_BUF_PORT_REVERSAL;
1543 	if (hdmi_connector)
1544 		intel_dig_port->hdmi.sdvox_reg = DDI_BUF_CTL(port);
1545 	else
1546 		intel_dig_port->hdmi.sdvox_reg = 0;
1547 	intel_dig_port->dp.output_reg = DDI_BUF_CTL(port);
1548 
1549 	intel_encoder->type = INTEL_OUTPUT_UNKNOWN;
1550 	intel_encoder->crtc_mask =  (1 << 0) | (1 << 1) | (1 << 2);
1551 	intel_encoder->cloneable = false;
1552 	intel_encoder->hot_plug = intel_ddi_hot_plug;
1553 
1554 	if (hdmi_connector)
1555 		intel_hdmi_init_connector(intel_dig_port, hdmi_connector);
1556 	intel_dp_init_connector(intel_dig_port, dp_connector);
1557 }
1558