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Merge branch 'drm-intel-fixes' of git://people.freedesktop.org/~danvet/drm-intel...
[~shefty/rdma-dev.git] / drivers / gpu / drm / i915 / intel_display.c
1 /*
2  * Copyright © 2006-2007 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
21  * DEALINGS IN THE SOFTWARE.
22  *
23  * Authors:
24  *      Eric Anholt <eric@anholt.net>
25  */
26
27 #include <linux/dmi.h>
28 #include <linux/module.h>
29 #include <linux/input.h>
30 #include <linux/i2c.h>
31 #include <linux/kernel.h>
32 #include <linux/slab.h>
33 #include <linux/vgaarb.h>
34 #include <drm/drm_edid.h>
35 #include <drm/drmP.h>
36 #include "intel_drv.h"
37 #include <drm/i915_drm.h>
38 #include "i915_drv.h"
39 #include "i915_trace.h"
40 #include <drm/drm_dp_helper.h>
41 #include <drm/drm_crtc_helper.h>
42 #include <linux/dma_remapping.h>
43
44 #define HAS_eDP (intel_pipe_has_type(crtc, INTEL_OUTPUT_EDP))
45
46 bool intel_pipe_has_type(struct drm_crtc *crtc, int type);
47 static void intel_increase_pllclock(struct drm_crtc *crtc);
48 static void intel_crtc_update_cursor(struct drm_crtc *crtc, bool on);
49
50 typedef struct {
51         /* given values */
52         int n;
53         int m1, m2;
54         int p1, p2;
55         /* derived values */
56         int     dot;
57         int     vco;
58         int     m;
59         int     p;
60 } intel_clock_t;
61
62 typedef struct {
63         int     min, max;
64 } intel_range_t;
65
66 typedef struct {
67         int     dot_limit;
68         int     p2_slow, p2_fast;
69 } intel_p2_t;
70
71 #define INTEL_P2_NUM                  2
72 typedef struct intel_limit intel_limit_t;
73 struct intel_limit {
74         intel_range_t   dot, vco, n, m, m1, m2, p, p1;
75         intel_p2_t          p2;
76         bool (* find_pll)(const intel_limit_t *, struct drm_crtc *,
77                         int, int, intel_clock_t *, intel_clock_t *);
78 };
79
80 /* FDI */
81 #define IRONLAKE_FDI_FREQ               2700000 /* in kHz for mode->clock */
82
83 static bool
84 intel_find_best_PLL(const intel_limit_t *limit, struct drm_crtc *crtc,
85                     int target, int refclk, intel_clock_t *match_clock,
86                     intel_clock_t *best_clock);
87 static bool
88 intel_g4x_find_best_PLL(const intel_limit_t *limit, struct drm_crtc *crtc,
89                         int target, int refclk, intel_clock_t *match_clock,
90                         intel_clock_t *best_clock);
91
92 static bool
93 intel_find_pll_g4x_dp(const intel_limit_t *, struct drm_crtc *crtc,
94                       int target, int refclk, intel_clock_t *match_clock,
95                       intel_clock_t *best_clock);
96 static bool
97 intel_find_pll_ironlake_dp(const intel_limit_t *, struct drm_crtc *crtc,
98                            int target, int refclk, intel_clock_t *match_clock,
99                            intel_clock_t *best_clock);
100
101 static bool
102 intel_vlv_find_best_pll(const intel_limit_t *limit, struct drm_crtc *crtc,
103                         int target, int refclk, intel_clock_t *match_clock,
104                         intel_clock_t *best_clock);
105
106 static inline u32 /* units of 100MHz */
107 intel_fdi_link_freq(struct drm_device *dev)
108 {
109         if (IS_GEN5(dev)) {
110                 struct drm_i915_private *dev_priv = dev->dev_private;
111                 return (I915_READ(FDI_PLL_BIOS_0) & FDI_PLL_FB_CLOCK_MASK) + 2;
112         } else
113                 return 27;
114 }
115
116 static const intel_limit_t intel_limits_i8xx_dvo = {
117         .dot = { .min = 25000, .max = 350000 },
118         .vco = { .min = 930000, .max = 1400000 },
119         .n = { .min = 3, .max = 16 },
120         .m = { .min = 96, .max = 140 },
121         .m1 = { .min = 18, .max = 26 },
122         .m2 = { .min = 6, .max = 16 },
123         .p = { .min = 4, .max = 128 },
124         .p1 = { .min = 2, .max = 33 },
125         .p2 = { .dot_limit = 165000,
126                 .p2_slow = 4, .p2_fast = 2 },
127         .find_pll = intel_find_best_PLL,
128 };
129
130 static const intel_limit_t intel_limits_i8xx_lvds = {
131         .dot = { .min = 25000, .max = 350000 },
132         .vco = { .min = 930000, .max = 1400000 },
133         .n = { .min = 3, .max = 16 },
134         .m = { .min = 96, .max = 140 },
135         .m1 = { .min = 18, .max = 26 },
136         .m2 = { .min = 6, .max = 16 },
137         .p = { .min = 4, .max = 128 },
138         .p1 = { .min = 1, .max = 6 },
139         .p2 = { .dot_limit = 165000,
140                 .p2_slow = 14, .p2_fast = 7 },
141         .find_pll = intel_find_best_PLL,
142 };
143
144 static const intel_limit_t intel_limits_i9xx_sdvo = {
145         .dot = { .min = 20000, .max = 400000 },
146         .vco = { .min = 1400000, .max = 2800000 },
147         .n = { .min = 1, .max = 6 },
148         .m = { .min = 70, .max = 120 },
149         .m1 = { .min = 10, .max = 22 },
150         .m2 = { .min = 5, .max = 9 },
151         .p = { .min = 5, .max = 80 },
152         .p1 = { .min = 1, .max = 8 },
153         .p2 = { .dot_limit = 200000,
154                 .p2_slow = 10, .p2_fast = 5 },
155         .find_pll = intel_find_best_PLL,
156 };
157
158 static const intel_limit_t intel_limits_i9xx_lvds = {
159         .dot = { .min = 20000, .max = 400000 },
160         .vco = { .min = 1400000, .max = 2800000 },
161         .n = { .min = 1, .max = 6 },
162         .m = { .min = 70, .max = 120 },
163         .m1 = { .min = 10, .max = 22 },
164         .m2 = { .min = 5, .max = 9 },
165         .p = { .min = 7, .max = 98 },
166         .p1 = { .min = 1, .max = 8 },
167         .p2 = { .dot_limit = 112000,
168                 .p2_slow = 14, .p2_fast = 7 },
169         .find_pll = intel_find_best_PLL,
170 };
171
172
173 static const intel_limit_t intel_limits_g4x_sdvo = {
174         .dot = { .min = 25000, .max = 270000 },
175         .vco = { .min = 1750000, .max = 3500000},
176         .n = { .min = 1, .max = 4 },
177         .m = { .min = 104, .max = 138 },
178         .m1 = { .min = 17, .max = 23 },
179         .m2 = { .min = 5, .max = 11 },
180         .p = { .min = 10, .max = 30 },
181         .p1 = { .min = 1, .max = 3},
182         .p2 = { .dot_limit = 270000,
183                 .p2_slow = 10,
184                 .p2_fast = 10
185         },
186         .find_pll = intel_g4x_find_best_PLL,
187 };
188
189 static const intel_limit_t intel_limits_g4x_hdmi = {
190         .dot = { .min = 22000, .max = 400000 },
191         .vco = { .min = 1750000, .max = 3500000},
192         .n = { .min = 1, .max = 4 },
193         .m = { .min = 104, .max = 138 },
194         .m1 = { .min = 16, .max = 23 },
195         .m2 = { .min = 5, .max = 11 },
196         .p = { .min = 5, .max = 80 },
197         .p1 = { .min = 1, .max = 8},
198         .p2 = { .dot_limit = 165000,
199                 .p2_slow = 10, .p2_fast = 5 },
200         .find_pll = intel_g4x_find_best_PLL,
201 };
202
203 static const intel_limit_t intel_limits_g4x_single_channel_lvds = {
204         .dot = { .min = 20000, .max = 115000 },
205         .vco = { .min = 1750000, .max = 3500000 },
206         .n = { .min = 1, .max = 3 },
207         .m = { .min = 104, .max = 138 },
208         .m1 = { .min = 17, .max = 23 },
209         .m2 = { .min = 5, .max = 11 },
210         .p = { .min = 28, .max = 112 },
211         .p1 = { .min = 2, .max = 8 },
212         .p2 = { .dot_limit = 0,
213                 .p2_slow = 14, .p2_fast = 14
214         },
215         .find_pll = intel_g4x_find_best_PLL,
216 };
217
218 static const intel_limit_t intel_limits_g4x_dual_channel_lvds = {
219         .dot = { .min = 80000, .max = 224000 },
220         .vco = { .min = 1750000, .max = 3500000 },
221         .n = { .min = 1, .max = 3 },
222         .m = { .min = 104, .max = 138 },
223         .m1 = { .min = 17, .max = 23 },
224         .m2 = { .min = 5, .max = 11 },
225         .p = { .min = 14, .max = 42 },
226         .p1 = { .min = 2, .max = 6 },
227         .p2 = { .dot_limit = 0,
228                 .p2_slow = 7, .p2_fast = 7
229         },
230         .find_pll = intel_g4x_find_best_PLL,
231 };
232
233 static const intel_limit_t intel_limits_g4x_display_port = {
234         .dot = { .min = 161670, .max = 227000 },
235         .vco = { .min = 1750000, .max = 3500000},
236         .n = { .min = 1, .max = 2 },
237         .m = { .min = 97, .max = 108 },
238         .m1 = { .min = 0x10, .max = 0x12 },
239         .m2 = { .min = 0x05, .max = 0x06 },
240         .p = { .min = 10, .max = 20 },
241         .p1 = { .min = 1, .max = 2},
242         .p2 = { .dot_limit = 0,
243                 .p2_slow = 10, .p2_fast = 10 },
244         .find_pll = intel_find_pll_g4x_dp,
245 };
246
247 static const intel_limit_t intel_limits_pineview_sdvo = {
248         .dot = { .min = 20000, .max = 400000},
249         .vco = { .min = 1700000, .max = 3500000 },
250         /* Pineview's Ncounter is a ring counter */
251         .n = { .min = 3, .max = 6 },
252         .m = { .min = 2, .max = 256 },
253         /* Pineview only has one combined m divider, which we treat as m2. */
254         .m1 = { .min = 0, .max = 0 },
255         .m2 = { .min = 0, .max = 254 },
256         .p = { .min = 5, .max = 80 },
257         .p1 = { .min = 1, .max = 8 },
258         .p2 = { .dot_limit = 200000,
259                 .p2_slow = 10, .p2_fast = 5 },
260         .find_pll = intel_find_best_PLL,
261 };
262
263 static const intel_limit_t intel_limits_pineview_lvds = {
264         .dot = { .min = 20000, .max = 400000 },
265         .vco = { .min = 1700000, .max = 3500000 },
266         .n = { .min = 3, .max = 6 },
267         .m = { .min = 2, .max = 256 },
268         .m1 = { .min = 0, .max = 0 },
269         .m2 = { .min = 0, .max = 254 },
270         .p = { .min = 7, .max = 112 },
271         .p1 = { .min = 1, .max = 8 },
272         .p2 = { .dot_limit = 112000,
273                 .p2_slow = 14, .p2_fast = 14 },
274         .find_pll = intel_find_best_PLL,
275 };
276
277 /* Ironlake / Sandybridge
278  *
279  * We calculate clock using (register_value + 2) for N/M1/M2, so here
280  * the range value for them is (actual_value - 2).
281  */
282 static const intel_limit_t intel_limits_ironlake_dac = {
283         .dot = { .min = 25000, .max = 350000 },
284         .vco = { .min = 1760000, .max = 3510000 },
285         .n = { .min = 1, .max = 5 },
286         .m = { .min = 79, .max = 127 },
287         .m1 = { .min = 12, .max = 22 },
288         .m2 = { .min = 5, .max = 9 },
289         .p = { .min = 5, .max = 80 },
290         .p1 = { .min = 1, .max = 8 },
291         .p2 = { .dot_limit = 225000,
292                 .p2_slow = 10, .p2_fast = 5 },
293         .find_pll = intel_g4x_find_best_PLL,
294 };
295
296 static const intel_limit_t intel_limits_ironlake_single_lvds = {
297         .dot = { .min = 25000, .max = 350000 },
298         .vco = { .min = 1760000, .max = 3510000 },
299         .n = { .min = 1, .max = 3 },
300         .m = { .min = 79, .max = 118 },
301         .m1 = { .min = 12, .max = 22 },
302         .m2 = { .min = 5, .max = 9 },
303         .p = { .min = 28, .max = 112 },
304         .p1 = { .min = 2, .max = 8 },
305         .p2 = { .dot_limit = 225000,
306                 .p2_slow = 14, .p2_fast = 14 },
307         .find_pll = intel_g4x_find_best_PLL,
308 };
309
310 static const intel_limit_t intel_limits_ironlake_dual_lvds = {
311         .dot = { .min = 25000, .max = 350000 },
312         .vco = { .min = 1760000, .max = 3510000 },
313         .n = { .min = 1, .max = 3 },
314         .m = { .min = 79, .max = 127 },
315         .m1 = { .min = 12, .max = 22 },
316         .m2 = { .min = 5, .max = 9 },
317         .p = { .min = 14, .max = 56 },
318         .p1 = { .min = 2, .max = 8 },
319         .p2 = { .dot_limit = 225000,
320                 .p2_slow = 7, .p2_fast = 7 },
321         .find_pll = intel_g4x_find_best_PLL,
322 };
323
324 /* LVDS 100mhz refclk limits. */
325 static const intel_limit_t intel_limits_ironlake_single_lvds_100m = {
326         .dot = { .min = 25000, .max = 350000 },
327         .vco = { .min = 1760000, .max = 3510000 },
328         .n = { .min = 1, .max = 2 },
329         .m = { .min = 79, .max = 126 },
330         .m1 = { .min = 12, .max = 22 },
331         .m2 = { .min = 5, .max = 9 },
332         .p = { .min = 28, .max = 112 },
333         .p1 = { .min = 2, .max = 8 },
334         .p2 = { .dot_limit = 225000,
335                 .p2_slow = 14, .p2_fast = 14 },
336         .find_pll = intel_g4x_find_best_PLL,
337 };
338
339 static const intel_limit_t intel_limits_ironlake_dual_lvds_100m = {
340         .dot = { .min = 25000, .max = 350000 },
341         .vco = { .min = 1760000, .max = 3510000 },
342         .n = { .min = 1, .max = 3 },
343         .m = { .min = 79, .max = 126 },
344         .m1 = { .min = 12, .max = 22 },
345         .m2 = { .min = 5, .max = 9 },
346         .p = { .min = 14, .max = 42 },
347         .p1 = { .min = 2, .max = 6 },
348         .p2 = { .dot_limit = 225000,
349                 .p2_slow = 7, .p2_fast = 7 },
350         .find_pll = intel_g4x_find_best_PLL,
351 };
352
353 static const intel_limit_t intel_limits_ironlake_display_port = {
354         .dot = { .min = 25000, .max = 350000 },
355         .vco = { .min = 1760000, .max = 3510000},
356         .n = { .min = 1, .max = 2 },
357         .m = { .min = 81, .max = 90 },
358         .m1 = { .min = 12, .max = 22 },
359         .m2 = { .min = 5, .max = 9 },
360         .p = { .min = 10, .max = 20 },
361         .p1 = { .min = 1, .max = 2},
362         .p2 = { .dot_limit = 0,
363                 .p2_slow = 10, .p2_fast = 10 },
364         .find_pll = intel_find_pll_ironlake_dp,
365 };
366
367 static const intel_limit_t intel_limits_vlv_dac = {
368         .dot = { .min = 25000, .max = 270000 },
369         .vco = { .min = 4000000, .max = 6000000 },
370         .n = { .min = 1, .max = 7 },
371         .m = { .min = 22, .max = 450 }, /* guess */
372         .m1 = { .min = 2, .max = 3 },
373         .m2 = { .min = 11, .max = 156 },
374         .p = { .min = 10, .max = 30 },
375         .p1 = { .min = 2, .max = 3 },
376         .p2 = { .dot_limit = 270000,
377                 .p2_slow = 2, .p2_fast = 20 },
378         .find_pll = intel_vlv_find_best_pll,
379 };
380
381 static const intel_limit_t intel_limits_vlv_hdmi = {
382         .dot = { .min = 20000, .max = 165000 },
383         .vco = { .min = 5994000, .max = 4000000 },
384         .n = { .min = 1, .max = 7 },
385         .m = { .min = 60, .max = 300 }, /* guess */
386         .m1 = { .min = 2, .max = 3 },
387         .m2 = { .min = 11, .max = 156 },
388         .p = { .min = 10, .max = 30 },
389         .p1 = { .min = 2, .max = 3 },
390         .p2 = { .dot_limit = 270000,
391                 .p2_slow = 2, .p2_fast = 20 },
392         .find_pll = intel_vlv_find_best_pll,
393 };
394
395 static const intel_limit_t intel_limits_vlv_dp = {
396         .dot = { .min = 162000, .max = 270000 },
397         .vco = { .min = 5994000, .max = 4000000 },
398         .n = { .min = 1, .max = 7 },
399         .m = { .min = 60, .max = 300 }, /* guess */
400         .m1 = { .min = 2, .max = 3 },
401         .m2 = { .min = 11, .max = 156 },
402         .p = { .min = 10, .max = 30 },
403         .p1 = { .min = 2, .max = 3 },
404         .p2 = { .dot_limit = 270000,
405                 .p2_slow = 2, .p2_fast = 20 },
406         .find_pll = intel_vlv_find_best_pll,
407 };
408
409 u32 intel_dpio_read(struct drm_i915_private *dev_priv, int reg)
410 {
411         unsigned long flags;
412         u32 val = 0;
413
414         spin_lock_irqsave(&dev_priv->dpio_lock, flags);
415         if (wait_for_atomic_us((I915_READ(DPIO_PKT) & DPIO_BUSY) == 0, 100)) {
416                 DRM_ERROR("DPIO idle wait timed out\n");
417                 goto out_unlock;
418         }
419
420         I915_WRITE(DPIO_REG, reg);
421         I915_WRITE(DPIO_PKT, DPIO_RID | DPIO_OP_READ | DPIO_PORTID |
422                    DPIO_BYTE);
423         if (wait_for_atomic_us((I915_READ(DPIO_PKT) & DPIO_BUSY) == 0, 100)) {
424                 DRM_ERROR("DPIO read wait timed out\n");
425                 goto out_unlock;
426         }
427         val = I915_READ(DPIO_DATA);
428
429 out_unlock:
430         spin_unlock_irqrestore(&dev_priv->dpio_lock, flags);
431         return val;
432 }
433
434 static void intel_dpio_write(struct drm_i915_private *dev_priv, int reg,
435                              u32 val)
436 {
437         unsigned long flags;
438
439         spin_lock_irqsave(&dev_priv->dpio_lock, flags);
440         if (wait_for_atomic_us((I915_READ(DPIO_PKT) & DPIO_BUSY) == 0, 100)) {
441                 DRM_ERROR("DPIO idle wait timed out\n");
442                 goto out_unlock;
443         }
444
445         I915_WRITE(DPIO_DATA, val);
446         I915_WRITE(DPIO_REG, reg);
447         I915_WRITE(DPIO_PKT, DPIO_RID | DPIO_OP_WRITE | DPIO_PORTID |
448                    DPIO_BYTE);
449         if (wait_for_atomic_us((I915_READ(DPIO_PKT) & DPIO_BUSY) == 0, 100))
450                 DRM_ERROR("DPIO write wait timed out\n");
451
452 out_unlock:
453        spin_unlock_irqrestore(&dev_priv->dpio_lock, flags);
454 }
455
456 static void vlv_init_dpio(struct drm_device *dev)
457 {
458         struct drm_i915_private *dev_priv = dev->dev_private;
459
460         /* Reset the DPIO config */
461         I915_WRITE(DPIO_CTL, 0);
462         POSTING_READ(DPIO_CTL);
463         I915_WRITE(DPIO_CTL, 1);
464         POSTING_READ(DPIO_CTL);
465 }
466
467 static int intel_dual_link_lvds_callback(const struct dmi_system_id *id)
468 {
469         DRM_INFO("Forcing lvds to dual link mode on %s\n", id->ident);
470         return 1;
471 }
472
473 static const struct dmi_system_id intel_dual_link_lvds[] = {
474         {
475                 .callback = intel_dual_link_lvds_callback,
476                 .ident = "Apple MacBook Pro (Core i5/i7 Series)",
477                 .matches = {
478                         DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
479                         DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro8,2"),
480                 },
481         },
482         { }     /* terminating entry */
483 };
484
485 static bool is_dual_link_lvds(struct drm_i915_private *dev_priv,
486                               unsigned int reg)
487 {
488         unsigned int val;
489
490         /* use the module option value if specified */
491         if (i915_lvds_channel_mode > 0)
492                 return i915_lvds_channel_mode == 2;
493
494         if (dmi_check_system(intel_dual_link_lvds))
495                 return true;
496
497         if (dev_priv->lvds_val)
498                 val = dev_priv->lvds_val;
499         else {
500                 /* BIOS should set the proper LVDS register value at boot, but
501                  * in reality, it doesn't set the value when the lid is closed;
502                  * we need to check "the value to be set" in VBT when LVDS
503                  * register is uninitialized.
504                  */
505                 val = I915_READ(reg);
506                 if (!(val & ~(LVDS_PIPE_MASK | LVDS_DETECTED)))
507                         val = dev_priv->bios_lvds_val;
508                 dev_priv->lvds_val = val;
509         }
510         return (val & LVDS_CLKB_POWER_MASK) == LVDS_CLKB_POWER_UP;
511 }
512
513 static const intel_limit_t *intel_ironlake_limit(struct drm_crtc *crtc,
514                                                 int refclk)
515 {
516         struct drm_device *dev = crtc->dev;
517         struct drm_i915_private *dev_priv = dev->dev_private;
518         const intel_limit_t *limit;
519
520         if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS)) {
521                 if (is_dual_link_lvds(dev_priv, PCH_LVDS)) {
522                         /* LVDS dual channel */
523                         if (refclk == 100000)
524                                 limit = &intel_limits_ironlake_dual_lvds_100m;
525                         else
526                                 limit = &intel_limits_ironlake_dual_lvds;
527                 } else {
528                         if (refclk == 100000)
529                                 limit = &intel_limits_ironlake_single_lvds_100m;
530                         else
531                                 limit = &intel_limits_ironlake_single_lvds;
532                 }
533         } else if (intel_pipe_has_type(crtc, INTEL_OUTPUT_DISPLAYPORT) ||
534                         HAS_eDP)
535                 limit = &intel_limits_ironlake_display_port;
536         else
537                 limit = &intel_limits_ironlake_dac;
538
539         return limit;
540 }
541
542 static const intel_limit_t *intel_g4x_limit(struct drm_crtc *crtc)
543 {
544         struct drm_device *dev = crtc->dev;
545         struct drm_i915_private *dev_priv = dev->dev_private;
546         const intel_limit_t *limit;
547
548         if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS)) {
549                 if (is_dual_link_lvds(dev_priv, LVDS))
550                         /* LVDS with dual channel */
551                         limit = &intel_limits_g4x_dual_channel_lvds;
552                 else
553                         /* LVDS with dual channel */
554                         limit = &intel_limits_g4x_single_channel_lvds;
555         } else if (intel_pipe_has_type(crtc, INTEL_OUTPUT_HDMI) ||
556                    intel_pipe_has_type(crtc, INTEL_OUTPUT_ANALOG)) {
557                 limit = &intel_limits_g4x_hdmi;
558         } else if (intel_pipe_has_type(crtc, INTEL_OUTPUT_SDVO)) {
559                 limit = &intel_limits_g4x_sdvo;
560         } else if (intel_pipe_has_type(crtc, INTEL_OUTPUT_DISPLAYPORT)) {
561                 limit = &intel_limits_g4x_display_port;
562         } else /* The option is for other outputs */
563                 limit = &intel_limits_i9xx_sdvo;
564
565         return limit;
566 }
567
568 static const intel_limit_t *intel_limit(struct drm_crtc *crtc, int refclk)
569 {
570         struct drm_device *dev = crtc->dev;
571         const intel_limit_t *limit;
572
573         if (HAS_PCH_SPLIT(dev))
574                 limit = intel_ironlake_limit(crtc, refclk);
575         else if (IS_G4X(dev)) {
576                 limit = intel_g4x_limit(crtc);
577         } else if (IS_PINEVIEW(dev)) {
578                 if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS))
579                         limit = &intel_limits_pineview_lvds;
580                 else
581                         limit = &intel_limits_pineview_sdvo;
582         } else if (IS_VALLEYVIEW(dev)) {
583                 if (intel_pipe_has_type(crtc, INTEL_OUTPUT_ANALOG))
584                         limit = &intel_limits_vlv_dac;
585                 else if (intel_pipe_has_type(crtc, INTEL_OUTPUT_HDMI))
586                         limit = &intel_limits_vlv_hdmi;
587                 else
588                         limit = &intel_limits_vlv_dp;
589         } else if (!IS_GEN2(dev)) {
590                 if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS))
591                         limit = &intel_limits_i9xx_lvds;
592                 else
593                         limit = &intel_limits_i9xx_sdvo;
594         } else {
595                 if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS))
596                         limit = &intel_limits_i8xx_lvds;
597                 else
598                         limit = &intel_limits_i8xx_dvo;
599         }
600         return limit;
601 }
602
603 /* m1 is reserved as 0 in Pineview, n is a ring counter */
604 static void pineview_clock(int refclk, intel_clock_t *clock)
605 {
606         clock->m = clock->m2 + 2;
607         clock->p = clock->p1 * clock->p2;
608         clock->vco = refclk * clock->m / clock->n;
609         clock->dot = clock->vco / clock->p;
610 }
611
612 static void intel_clock(struct drm_device *dev, int refclk, intel_clock_t *clock)
613 {
614         if (IS_PINEVIEW(dev)) {
615                 pineview_clock(refclk, clock);
616                 return;
617         }
618         clock->m = 5 * (clock->m1 + 2) + (clock->m2 + 2);
619         clock->p = clock->p1 * clock->p2;
620         clock->vco = refclk * clock->m / (clock->n + 2);
621         clock->dot = clock->vco / clock->p;
622 }
623
624 /**
625  * Returns whether any output on the specified pipe is of the specified type
626  */
627 bool intel_pipe_has_type(struct drm_crtc *crtc, int type)
628 {
629         struct drm_device *dev = crtc->dev;
630         struct intel_encoder *encoder;
631
632         for_each_encoder_on_crtc(dev, crtc, encoder)
633                 if (encoder->type == type)
634                         return true;
635
636         return false;
637 }
638
639 #define INTELPllInvalid(s)   do { /* DRM_DEBUG(s); */ return false; } while (0)
640 /**
641  * Returns whether the given set of divisors are valid for a given refclk with
642  * the given connectors.
643  */
644
645 static bool intel_PLL_is_valid(struct drm_device *dev,
646                                const intel_limit_t *limit,
647                                const intel_clock_t *clock)
648 {
649         if (clock->p1  < limit->p1.min  || limit->p1.max  < clock->p1)
650                 INTELPllInvalid("p1 out of range\n");
651         if (clock->p   < limit->p.min   || limit->p.max   < clock->p)
652                 INTELPllInvalid("p out of range\n");
653         if (clock->m2  < limit->m2.min  || limit->m2.max  < clock->m2)
654                 INTELPllInvalid("m2 out of range\n");
655         if (clock->m1  < limit->m1.min  || limit->m1.max  < clock->m1)
656                 INTELPllInvalid("m1 out of range\n");
657         if (clock->m1 <= clock->m2 && !IS_PINEVIEW(dev))
658                 INTELPllInvalid("m1 <= m2\n");
659         if (clock->m   < limit->m.min   || limit->m.max   < clock->m)
660                 INTELPllInvalid("m out of range\n");
661         if (clock->n   < limit->n.min   || limit->n.max   < clock->n)
662                 INTELPllInvalid("n out of range\n");
663         if (clock->vco < limit->vco.min || limit->vco.max < clock->vco)
664                 INTELPllInvalid("vco out of range\n");
665         /* XXX: We may need to be checking "Dot clock" depending on the multiplier,
666          * connector, etc., rather than just a single range.
667          */
668         if (clock->dot < limit->dot.min || limit->dot.max < clock->dot)
669                 INTELPllInvalid("dot out of range\n");
670
671         return true;
672 }
673
674 static bool
675 intel_find_best_PLL(const intel_limit_t *limit, struct drm_crtc *crtc,
676                     int target, int refclk, intel_clock_t *match_clock,
677                     intel_clock_t *best_clock)
678
679 {
680         struct drm_device *dev = crtc->dev;
681         struct drm_i915_private *dev_priv = dev->dev_private;
682         intel_clock_t clock;
683         int err = target;
684
685         if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS) &&
686             (I915_READ(LVDS)) != 0) {
687                 /*
688                  * For LVDS, if the panel is on, just rely on its current
689                  * settings for dual-channel.  We haven't figured out how to
690                  * reliably set up different single/dual channel state, if we
691                  * even can.
692                  */
693                 if (is_dual_link_lvds(dev_priv, LVDS))
694                         clock.p2 = limit->p2.p2_fast;
695                 else
696                         clock.p2 = limit->p2.p2_slow;
697         } else {
698                 if (target < limit->p2.dot_limit)
699                         clock.p2 = limit->p2.p2_slow;
700                 else
701                         clock.p2 = limit->p2.p2_fast;
702         }
703
704         memset(best_clock, 0, sizeof(*best_clock));
705
706         for (clock.m1 = limit->m1.min; clock.m1 <= limit->m1.max;
707              clock.m1++) {
708                 for (clock.m2 = limit->m2.min;
709                      clock.m2 <= limit->m2.max; clock.m2++) {
710                         /* m1 is always 0 in Pineview */
711                         if (clock.m2 >= clock.m1 && !IS_PINEVIEW(dev))
712                                 break;
713                         for (clock.n = limit->n.min;
714                              clock.n <= limit->n.max; clock.n++) {
715                                 for (clock.p1 = limit->p1.min;
716                                         clock.p1 <= limit->p1.max; clock.p1++) {
717                                         int this_err;
718
719                                         intel_clock(dev, refclk, &clock);
720                                         if (!intel_PLL_is_valid(dev, limit,
721                                                                 &clock))
722                                                 continue;
723                                         if (match_clock &&
724                                             clock.p != match_clock->p)
725                                                 continue;
726
727                                         this_err = abs(clock.dot - target);
728                                         if (this_err < err) {
729                                                 *best_clock = clock;
730                                                 err = this_err;
731                                         }
732                                 }
733                         }
734                 }
735         }
736
737         return (err != target);
738 }
739
740 static bool
741 intel_g4x_find_best_PLL(const intel_limit_t *limit, struct drm_crtc *crtc,
742                         int target, int refclk, intel_clock_t *match_clock,
743                         intel_clock_t *best_clock)
744 {
745         struct drm_device *dev = crtc->dev;
746         struct drm_i915_private *dev_priv = dev->dev_private;
747         intel_clock_t clock;
748         int max_n;
749         bool found;
750         /* approximately equals target * 0.00585 */
751         int err_most = (target >> 8) + (target >> 9);
752         found = false;
753
754         if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS)) {
755                 int lvds_reg;
756
757                 if (HAS_PCH_SPLIT(dev))
758                         lvds_reg = PCH_LVDS;
759                 else
760                         lvds_reg = LVDS;
761                 if ((I915_READ(lvds_reg) & LVDS_CLKB_POWER_MASK) ==
762                     LVDS_CLKB_POWER_UP)
763                         clock.p2 = limit->p2.p2_fast;
764                 else
765                         clock.p2 = limit->p2.p2_slow;
766         } else {
767                 if (target < limit->p2.dot_limit)
768                         clock.p2 = limit->p2.p2_slow;
769                 else
770                         clock.p2 = limit->p2.p2_fast;
771         }
772
773         memset(best_clock, 0, sizeof(*best_clock));
774         max_n = limit->n.max;
775         /* based on hardware requirement, prefer smaller n to precision */
776         for (clock.n = limit->n.min; clock.n <= max_n; clock.n++) {
777                 /* based on hardware requirement, prefere larger m1,m2 */
778                 for (clock.m1 = limit->m1.max;
779                      clock.m1 >= limit->m1.min; clock.m1--) {
780                         for (clock.m2 = limit->m2.max;
781                              clock.m2 >= limit->m2.min; clock.m2--) {
782                                 for (clock.p1 = limit->p1.max;
783                                      clock.p1 >= limit->p1.min; clock.p1--) {
784                                         int this_err;
785
786                                         intel_clock(dev, refclk, &clock);
787                                         if (!intel_PLL_is_valid(dev, limit,
788                                                                 &clock))
789                                                 continue;
790                                         if (match_clock &&
791                                             clock.p != match_clock->p)
792                                                 continue;
793
794                                         this_err = abs(clock.dot - target);
795                                         if (this_err < err_most) {
796                                                 *best_clock = clock;
797                                                 err_most = this_err;
798                                                 max_n = clock.n;
799                                                 found = true;
800                                         }
801                                 }
802                         }
803                 }
804         }
805         return found;
806 }
807
808 static bool
809 intel_find_pll_ironlake_dp(const intel_limit_t *limit, struct drm_crtc *crtc,
810                            int target, int refclk, intel_clock_t *match_clock,
811                            intel_clock_t *best_clock)
812 {
813         struct drm_device *dev = crtc->dev;
814         intel_clock_t clock;
815
816         if (target < 200000) {
817                 clock.n = 1;
818                 clock.p1 = 2;
819                 clock.p2 = 10;
820                 clock.m1 = 12;
821                 clock.m2 = 9;
822         } else {
823                 clock.n = 2;
824                 clock.p1 = 1;
825                 clock.p2 = 10;
826                 clock.m1 = 14;
827                 clock.m2 = 8;
828         }
829         intel_clock(dev, refclk, &clock);
830         memcpy(best_clock, &clock, sizeof(intel_clock_t));
831         return true;
832 }
833
834 /* DisplayPort has only two frequencies, 162MHz and 270MHz */
835 static bool
836 intel_find_pll_g4x_dp(const intel_limit_t *limit, struct drm_crtc *crtc,
837                       int target, int refclk, intel_clock_t *match_clock,
838                       intel_clock_t *best_clock)
839 {
840         intel_clock_t clock;
841         if (target < 200000) {
842                 clock.p1 = 2;
843                 clock.p2 = 10;
844                 clock.n = 2;
845                 clock.m1 = 23;
846                 clock.m2 = 8;
847         } else {
848                 clock.p1 = 1;
849                 clock.p2 = 10;
850                 clock.n = 1;
851                 clock.m1 = 14;
852                 clock.m2 = 2;
853         }
854         clock.m = 5 * (clock.m1 + 2) + (clock.m2 + 2);
855         clock.p = (clock.p1 * clock.p2);
856         clock.dot = 96000 * clock.m / (clock.n + 2) / clock.p;
857         clock.vco = 0;
858         memcpy(best_clock, &clock, sizeof(intel_clock_t));
859         return true;
860 }
861 static bool
862 intel_vlv_find_best_pll(const intel_limit_t *limit, struct drm_crtc *crtc,
863                         int target, int refclk, intel_clock_t *match_clock,
864                         intel_clock_t *best_clock)
865 {
866         u32 p1, p2, m1, m2, vco, bestn, bestm1, bestm2, bestp1, bestp2;
867         u32 m, n, fastclk;
868         u32 updrate, minupdate, fracbits, p;
869         unsigned long bestppm, ppm, absppm;
870         int dotclk, flag;
871
872         flag = 0;
873         dotclk = target * 1000;
874         bestppm = 1000000;
875         ppm = absppm = 0;
876         fastclk = dotclk / (2*100);
877         updrate = 0;
878         minupdate = 19200;
879         fracbits = 1;
880         n = p = p1 = p2 = m = m1 = m2 = vco = bestn = 0;
881         bestm1 = bestm2 = bestp1 = bestp2 = 0;
882
883         /* based on hardware requirement, prefer smaller n to precision */
884         for (n = limit->n.min; n <= ((refclk) / minupdate); n++) {
885                 updrate = refclk / n;
886                 for (p1 = limit->p1.max; p1 > limit->p1.min; p1--) {
887                         for (p2 = limit->p2.p2_fast+1; p2 > 0; p2--) {
888                                 if (p2 > 10)
889                                         p2 = p2 - 1;
890                                 p = p1 * p2;
891                                 /* based on hardware requirement, prefer bigger m1,m2 values */
892                                 for (m1 = limit->m1.min; m1 <= limit->m1.max; m1++) {
893                                         m2 = (((2*(fastclk * p * n / m1 )) +
894                                                refclk) / (2*refclk));
895                                         m = m1 * m2;
896                                         vco = updrate * m;
897                                         if (vco >= limit->vco.min && vco < limit->vco.max) {
898                                                 ppm = 1000000 * ((vco / p) - fastclk) / fastclk;
899                                                 absppm = (ppm > 0) ? ppm : (-ppm);
900                                                 if (absppm < 100 && ((p1 * p2) > (bestp1 * bestp2))) {
901                                                         bestppm = 0;
902                                                         flag = 1;
903                                                 }
904                                                 if (absppm < bestppm - 10) {
905                                                         bestppm = absppm;
906                                                         flag = 1;
907                                                 }
908                                                 if (flag) {
909                                                         bestn = n;
910                                                         bestm1 = m1;
911                                                         bestm2 = m2;
912                                                         bestp1 = p1;
913                                                         bestp2 = p2;
914                                                         flag = 0;
915                                                 }
916                                         }
917                                 }
918                         }
919                 }
920         }
921         best_clock->n = bestn;
922         best_clock->m1 = bestm1;
923         best_clock->m2 = bestm2;
924         best_clock->p1 = bestp1;
925         best_clock->p2 = bestp2;
926
927         return true;
928 }
929
930 static void ironlake_wait_for_vblank(struct drm_device *dev, int pipe)
931 {
932         struct drm_i915_private *dev_priv = dev->dev_private;
933         u32 frame, frame_reg = PIPEFRAME(pipe);
934
935         frame = I915_READ(frame_reg);
936
937         if (wait_for(I915_READ_NOTRACE(frame_reg) != frame, 50))
938                 DRM_DEBUG_KMS("vblank wait timed out\n");
939 }
940
941 /**
942  * intel_wait_for_vblank - wait for vblank on a given pipe
943  * @dev: drm device
944  * @pipe: pipe to wait for
945  *
946  * Wait for vblank to occur on a given pipe.  Needed for various bits of
947  * mode setting code.
948  */
949 void intel_wait_for_vblank(struct drm_device *dev, int pipe)
950 {
951         struct drm_i915_private *dev_priv = dev->dev_private;
952         int pipestat_reg = PIPESTAT(pipe);
953
954         if (INTEL_INFO(dev)->gen >= 5) {
955                 ironlake_wait_for_vblank(dev, pipe);
956                 return;
957         }
958
959         /* Clear existing vblank status. Note this will clear any other
960          * sticky status fields as well.
961          *
962          * This races with i915_driver_irq_handler() with the result
963          * that either function could miss a vblank event.  Here it is not
964          * fatal, as we will either wait upon the next vblank interrupt or
965          * timeout.  Generally speaking intel_wait_for_vblank() is only
966          * called during modeset at which time the GPU should be idle and
967          * should *not* be performing page flips and thus not waiting on
968          * vblanks...
969          * Currently, the result of us stealing a vblank from the irq
970          * handler is that a single frame will be skipped during swapbuffers.
971          */
972         I915_WRITE(pipestat_reg,
973                    I915_READ(pipestat_reg) | PIPE_VBLANK_INTERRUPT_STATUS);
974
975         /* Wait for vblank interrupt bit to set */
976         if (wait_for(I915_READ(pipestat_reg) &
977                      PIPE_VBLANK_INTERRUPT_STATUS,
978                      50))
979                 DRM_DEBUG_KMS("vblank wait timed out\n");
980 }
981
982 /*
983  * intel_wait_for_pipe_off - wait for pipe to turn off
984  * @dev: drm device
985  * @pipe: pipe to wait for
986  *
987  * After disabling a pipe, we can't wait for vblank in the usual way,
988  * spinning on the vblank interrupt status bit, since we won't actually
989  * see an interrupt when the pipe is disabled.
990  *
991  * On Gen4 and above:
992  *   wait for the pipe register state bit to turn off
993  *
994  * Otherwise:
995  *   wait for the display line value to settle (it usually
996  *   ends up stopping at the start of the next frame).
997  *
998  */
999 void intel_wait_for_pipe_off(struct drm_device *dev, int pipe)
1000 {
1001         struct drm_i915_private *dev_priv = dev->dev_private;
1002
1003         if (INTEL_INFO(dev)->gen >= 4) {
1004                 int reg = PIPECONF(pipe);
1005
1006                 /* Wait for the Pipe State to go off */
1007                 if (wait_for((I915_READ(reg) & I965_PIPECONF_ACTIVE) == 0,
1008                              100))
1009                         WARN(1, "pipe_off wait timed out\n");
1010         } else {
1011                 u32 last_line, line_mask;
1012                 int reg = PIPEDSL(pipe);
1013                 unsigned long timeout = jiffies + msecs_to_jiffies(100);
1014
1015                 if (IS_GEN2(dev))
1016                         line_mask = DSL_LINEMASK_GEN2;
1017                 else
1018                         line_mask = DSL_LINEMASK_GEN3;
1019
1020                 /* Wait for the display line to settle */
1021                 do {
1022                         last_line = I915_READ(reg) & line_mask;
1023                         mdelay(5);
1024                 } while (((I915_READ(reg) & line_mask) != last_line) &&
1025                          time_after(timeout, jiffies));
1026                 if (time_after(jiffies, timeout))
1027                         WARN(1, "pipe_off wait timed out\n");
1028         }
1029 }
1030
1031 static const char *state_string(bool enabled)
1032 {
1033         return enabled ? "on" : "off";
1034 }
1035
1036 /* Only for pre-ILK configs */
1037 static void assert_pll(struct drm_i915_private *dev_priv,
1038                        enum pipe pipe, bool state)
1039 {
1040         int reg;
1041         u32 val;
1042         bool cur_state;
1043
1044         reg = DPLL(pipe);
1045         val = I915_READ(reg);
1046         cur_state = !!(val & DPLL_VCO_ENABLE);
1047         WARN(cur_state != state,
1048              "PLL state assertion failure (expected %s, current %s)\n",
1049              state_string(state), state_string(cur_state));
1050 }
1051 #define assert_pll_enabled(d, p) assert_pll(d, p, true)
1052 #define assert_pll_disabled(d, p) assert_pll(d, p, false)
1053
1054 /* For ILK+ */
1055 static void assert_pch_pll(struct drm_i915_private *dev_priv,
1056                            struct intel_pch_pll *pll,
1057                            struct intel_crtc *crtc,
1058                            bool state)
1059 {
1060         u32 val;
1061         bool cur_state;
1062
1063         if (HAS_PCH_LPT(dev_priv->dev)) {
1064                 DRM_DEBUG_DRIVER("LPT detected: skipping PCH PLL test\n");
1065                 return;
1066         }
1067
1068         if (WARN (!pll,
1069                   "asserting PCH PLL %s with no PLL\n", state_string(state)))
1070                 return;
1071
1072         val = I915_READ(pll->pll_reg);
1073         cur_state = !!(val & DPLL_VCO_ENABLE);
1074         WARN(cur_state != state,
1075              "PCH PLL state for reg %x assertion failure (expected %s, current %s), val=%08x\n",
1076              pll->pll_reg, state_string(state), state_string(cur_state), val);
1077
1078         /* Make sure the selected PLL is correctly attached to the transcoder */
1079         if (crtc && HAS_PCH_CPT(dev_priv->dev)) {
1080                 u32 pch_dpll;
1081
1082                 pch_dpll = I915_READ(PCH_DPLL_SEL);
1083                 cur_state = pll->pll_reg == _PCH_DPLL_B;
1084                 if (!WARN(((pch_dpll >> (4 * crtc->pipe)) & 1) != cur_state,
1085                           "PLL[%d] not attached to this transcoder %d: %08x\n",
1086                           cur_state, crtc->pipe, pch_dpll)) {
1087                         cur_state = !!(val >> (4*crtc->pipe + 3));
1088                         WARN(cur_state != state,
1089                              "PLL[%d] not %s on this transcoder %d: %08x\n",
1090                              pll->pll_reg == _PCH_DPLL_B,
1091                              state_string(state),
1092                              crtc->pipe,
1093                              val);
1094                 }
1095         }
1096 }
1097 #define assert_pch_pll_enabled(d, p, c) assert_pch_pll(d, p, c, true)
1098 #define assert_pch_pll_disabled(d, p, c) assert_pch_pll(d, p, c, false)
1099
1100 static void assert_fdi_tx(struct drm_i915_private *dev_priv,
1101                           enum pipe pipe, bool state)
1102 {
1103         int reg;
1104         u32 val;
1105         bool cur_state;
1106
1107         if (IS_HASWELL(dev_priv->dev)) {
1108                 /* On Haswell, DDI is used instead of FDI_TX_CTL */
1109                 reg = DDI_FUNC_CTL(pipe);
1110                 val = I915_READ(reg);
1111                 cur_state = !!(val & PIPE_DDI_FUNC_ENABLE);
1112         } else {
1113                 reg = FDI_TX_CTL(pipe);
1114                 val = I915_READ(reg);
1115                 cur_state = !!(val & FDI_TX_ENABLE);
1116         }
1117         WARN(cur_state != state,
1118              "FDI TX state assertion failure (expected %s, current %s)\n",
1119              state_string(state), state_string(cur_state));
1120 }
1121 #define assert_fdi_tx_enabled(d, p) assert_fdi_tx(d, p, true)
1122 #define assert_fdi_tx_disabled(d, p) assert_fdi_tx(d, p, false)
1123
1124 static void assert_fdi_rx(struct drm_i915_private *dev_priv,
1125                           enum pipe pipe, bool state)
1126 {
1127         int reg;
1128         u32 val;
1129         bool cur_state;
1130
1131         if (IS_HASWELL(dev_priv->dev) && pipe > 0) {
1132                         DRM_ERROR("Attempting to enable FDI_RX on Haswell pipe > 0\n");
1133                         return;
1134         } else {
1135                 reg = FDI_RX_CTL(pipe);
1136                 val = I915_READ(reg);
1137                 cur_state = !!(val & FDI_RX_ENABLE);
1138         }
1139         WARN(cur_state != state,
1140              "FDI RX state assertion failure (expected %s, current %s)\n",
1141              state_string(state), state_string(cur_state));
1142 }
1143 #define assert_fdi_rx_enabled(d, p) assert_fdi_rx(d, p, true)
1144 #define assert_fdi_rx_disabled(d, p) assert_fdi_rx(d, p, false)
1145
1146 static void assert_fdi_tx_pll_enabled(struct drm_i915_private *dev_priv,
1147                                       enum pipe pipe)
1148 {
1149         int reg;
1150         u32 val;
1151
1152         /* ILK FDI PLL is always enabled */
1153         if (dev_priv->info->gen == 5)
1154                 return;
1155
1156         /* On Haswell, DDI ports are responsible for the FDI PLL setup */
1157         if (IS_HASWELL(dev_priv->dev))
1158                 return;
1159
1160         reg = FDI_TX_CTL(pipe);
1161         val = I915_READ(reg);
1162         WARN(!(val & FDI_TX_PLL_ENABLE), "FDI TX PLL assertion failure, should be active but is disabled\n");
1163 }
1164
1165 static void assert_fdi_rx_pll_enabled(struct drm_i915_private *dev_priv,
1166                                       enum pipe pipe)
1167 {
1168         int reg;
1169         u32 val;
1170
1171         if (IS_HASWELL(dev_priv->dev) && pipe > 0) {
1172                 DRM_ERROR("Attempting to enable FDI on Haswell with pipe > 0\n");
1173                 return;
1174         }
1175         reg = FDI_RX_CTL(pipe);
1176         val = I915_READ(reg);
1177         WARN(!(val & FDI_RX_PLL_ENABLE), "FDI RX PLL assertion failure, should be active but is disabled\n");
1178 }
1179
1180 static void assert_panel_unlocked(struct drm_i915_private *dev_priv,
1181                                   enum pipe pipe)
1182 {
1183         int pp_reg, lvds_reg;
1184         u32 val;
1185         enum pipe panel_pipe = PIPE_A;
1186         bool locked = true;
1187
1188         if (HAS_PCH_SPLIT(dev_priv->dev)) {
1189                 pp_reg = PCH_PP_CONTROL;
1190                 lvds_reg = PCH_LVDS;
1191         } else {
1192                 pp_reg = PP_CONTROL;
1193                 lvds_reg = LVDS;
1194         }
1195
1196         val = I915_READ(pp_reg);
1197         if (!(val & PANEL_POWER_ON) ||
1198             ((val & PANEL_UNLOCK_REGS) == PANEL_UNLOCK_REGS))
1199                 locked = false;
1200
1201         if (I915_READ(lvds_reg) & LVDS_PIPEB_SELECT)
1202                 panel_pipe = PIPE_B;
1203
1204         WARN(panel_pipe == pipe && locked,
1205              "panel assertion failure, pipe %c regs locked\n",
1206              pipe_name(pipe));
1207 }
1208
1209 void assert_pipe(struct drm_i915_private *dev_priv,
1210                  enum pipe pipe, bool state)
1211 {
1212         int reg;
1213         u32 val;
1214         bool cur_state;
1215
1216         /* if we need the pipe A quirk it must be always on */
1217         if (pipe == PIPE_A && dev_priv->quirks & QUIRK_PIPEA_FORCE)
1218                 state = true;
1219
1220         reg = PIPECONF(pipe);
1221         val = I915_READ(reg);
1222         cur_state = !!(val & PIPECONF_ENABLE);
1223         WARN(cur_state != state,
1224              "pipe %c assertion failure (expected %s, current %s)\n",
1225              pipe_name(pipe), state_string(state), state_string(cur_state));
1226 }
1227
1228 static void assert_plane(struct drm_i915_private *dev_priv,
1229                          enum plane plane, bool state)
1230 {
1231         int reg;
1232         u32 val;
1233         bool cur_state;
1234
1235         reg = DSPCNTR(plane);
1236         val = I915_READ(reg);
1237         cur_state = !!(val & DISPLAY_PLANE_ENABLE);
1238         WARN(cur_state != state,
1239              "plane %c assertion failure (expected %s, current %s)\n",
1240              plane_name(plane), state_string(state), state_string(cur_state));
1241 }
1242
1243 #define assert_plane_enabled(d, p) assert_plane(d, p, true)
1244 #define assert_plane_disabled(d, p) assert_plane(d, p, false)
1245
1246 static void assert_planes_disabled(struct drm_i915_private *dev_priv,
1247                                    enum pipe pipe)
1248 {
1249         int reg, i;
1250         u32 val;
1251         int cur_pipe;
1252
1253         /* Planes are fixed to pipes on ILK+ */
1254         if (HAS_PCH_SPLIT(dev_priv->dev)) {
1255                 reg = DSPCNTR(pipe);
1256                 val = I915_READ(reg);
1257                 WARN((val & DISPLAY_PLANE_ENABLE),
1258                      "plane %c assertion failure, should be disabled but not\n",
1259                      plane_name(pipe));
1260                 return;
1261         }
1262
1263         /* Need to check both planes against the pipe */
1264         for (i = 0; i < 2; i++) {
1265                 reg = DSPCNTR(i);
1266                 val = I915_READ(reg);
1267                 cur_pipe = (val & DISPPLANE_SEL_PIPE_MASK) >>
1268                         DISPPLANE_SEL_PIPE_SHIFT;
1269                 WARN((val & DISPLAY_PLANE_ENABLE) && pipe == cur_pipe,
1270                      "plane %c assertion failure, should be off on pipe %c but is still active\n",
1271                      plane_name(i), pipe_name(pipe));
1272         }
1273 }
1274
1275 static void assert_pch_refclk_enabled(struct drm_i915_private *dev_priv)
1276 {
1277         u32 val;
1278         bool enabled;
1279
1280         if (HAS_PCH_LPT(dev_priv->dev)) {
1281                 DRM_DEBUG_DRIVER("LPT does not has PCH refclk, skipping check\n");
1282                 return;
1283         }
1284
1285         val = I915_READ(PCH_DREF_CONTROL);
1286         enabled = !!(val & (DREF_SSC_SOURCE_MASK | DREF_NONSPREAD_SOURCE_MASK |
1287                             DREF_SUPERSPREAD_SOURCE_MASK));
1288         WARN(!enabled, "PCH refclk assertion failure, should be active but is disabled\n");
1289 }
1290
1291 static void assert_transcoder_disabled(struct drm_i915_private *dev_priv,
1292                                        enum pipe pipe)
1293 {
1294         int reg;
1295         u32 val;
1296         bool enabled;
1297
1298         reg = TRANSCONF(pipe);
1299         val = I915_READ(reg);
1300         enabled = !!(val & TRANS_ENABLE);
1301         WARN(enabled,
1302              "transcoder assertion failed, should be off on pipe %c but is still active\n",
1303              pipe_name(pipe));
1304 }
1305
1306 static bool dp_pipe_enabled(struct drm_i915_private *dev_priv,
1307                             enum pipe pipe, u32 port_sel, u32 val)
1308 {
1309         if ((val & DP_PORT_EN) == 0)
1310                 return false;
1311
1312         if (HAS_PCH_CPT(dev_priv->dev)) {
1313                 u32     trans_dp_ctl_reg = TRANS_DP_CTL(pipe);
1314                 u32     trans_dp_ctl = I915_READ(trans_dp_ctl_reg);
1315                 if ((trans_dp_ctl & TRANS_DP_PORT_SEL_MASK) != port_sel)
1316                         return false;
1317         } else {
1318                 if ((val & DP_PIPE_MASK) != (pipe << 30))
1319                         return false;
1320         }
1321         return true;
1322 }
1323
1324 static bool hdmi_pipe_enabled(struct drm_i915_private *dev_priv,
1325                               enum pipe pipe, u32 val)
1326 {
1327         if ((val & PORT_ENABLE) == 0)
1328                 return false;
1329
1330         if (HAS_PCH_CPT(dev_priv->dev)) {
1331                 if ((val & PORT_TRANS_SEL_MASK) != PORT_TRANS_SEL_CPT(pipe))
1332                         return false;
1333         } else {
1334                 if ((val & TRANSCODER_MASK) != TRANSCODER(pipe))
1335                         return false;
1336         }
1337         return true;
1338 }
1339
1340 static bool lvds_pipe_enabled(struct drm_i915_private *dev_priv,
1341                               enum pipe pipe, u32 val)
1342 {
1343         if ((val & LVDS_PORT_EN) == 0)
1344                 return false;
1345
1346         if (HAS_PCH_CPT(dev_priv->dev)) {
1347                 if ((val & PORT_TRANS_SEL_MASK) != PORT_TRANS_SEL_CPT(pipe))
1348                         return false;
1349         } else {
1350                 if ((val & LVDS_PIPE_MASK) != LVDS_PIPE(pipe))
1351                         return false;
1352         }
1353         return true;
1354 }
1355
1356 static bool adpa_pipe_enabled(struct drm_i915_private *dev_priv,
1357                               enum pipe pipe, u32 val)
1358 {
1359         if ((val & ADPA_DAC_ENABLE) == 0)
1360                 return false;
1361         if (HAS_PCH_CPT(dev_priv->dev)) {
1362                 if ((val & PORT_TRANS_SEL_MASK) != PORT_TRANS_SEL_CPT(pipe))
1363                         return false;
1364         } else {
1365                 if ((val & ADPA_PIPE_SELECT_MASK) != ADPA_PIPE_SELECT(pipe))
1366                         return false;
1367         }
1368         return true;
1369 }
1370
1371 static void assert_pch_dp_disabled(struct drm_i915_private *dev_priv,
1372                                    enum pipe pipe, int reg, u32 port_sel)
1373 {
1374         u32 val = I915_READ(reg);
1375         WARN(dp_pipe_enabled(dev_priv, pipe, port_sel, val),
1376              "PCH DP (0x%08x) enabled on transcoder %c, should be disabled\n",
1377              reg, pipe_name(pipe));
1378
1379         WARN(HAS_PCH_IBX(dev_priv->dev) && (val & DP_PORT_EN) == 0
1380              && (val & DP_PIPEB_SELECT),
1381              "IBX PCH dp port still using transcoder B\n");
1382 }
1383
1384 static void assert_pch_hdmi_disabled(struct drm_i915_private *dev_priv,
1385                                      enum pipe pipe, int reg)
1386 {
1387         u32 val = I915_READ(reg);
1388         WARN(hdmi_pipe_enabled(dev_priv, pipe, val),
1389              "PCH HDMI (0x%08x) enabled on transcoder %c, should be disabled\n",
1390              reg, pipe_name(pipe));
1391
1392         WARN(HAS_PCH_IBX(dev_priv->dev) && (val & PORT_ENABLE) == 0
1393              && (val & SDVO_PIPE_B_SELECT),
1394              "IBX PCH hdmi port still using transcoder B\n");
1395 }
1396
1397 static void assert_pch_ports_disabled(struct drm_i915_private *dev_priv,
1398                                       enum pipe pipe)
1399 {
1400         int reg;
1401         u32 val;
1402
1403         assert_pch_dp_disabled(dev_priv, pipe, PCH_DP_B, TRANS_DP_PORT_SEL_B);
1404         assert_pch_dp_disabled(dev_priv, pipe, PCH_DP_C, TRANS_DP_PORT_SEL_C);
1405         assert_pch_dp_disabled(dev_priv, pipe, PCH_DP_D, TRANS_DP_PORT_SEL_D);
1406
1407         reg = PCH_ADPA;
1408         val = I915_READ(reg);
1409         WARN(adpa_pipe_enabled(dev_priv, pipe, val),
1410              "PCH VGA enabled on transcoder %c, should be disabled\n",
1411              pipe_name(pipe));
1412
1413         reg = PCH_LVDS;
1414         val = I915_READ(reg);
1415         WARN(lvds_pipe_enabled(dev_priv, pipe, val),
1416              "PCH LVDS enabled on transcoder %c, should be disabled\n",
1417              pipe_name(pipe));
1418
1419         assert_pch_hdmi_disabled(dev_priv, pipe, HDMIB);
1420         assert_pch_hdmi_disabled(dev_priv, pipe, HDMIC);
1421         assert_pch_hdmi_disabled(dev_priv, pipe, HDMID);
1422 }
1423
1424 /**
1425  * intel_enable_pll - enable a PLL
1426  * @dev_priv: i915 private structure
1427  * @pipe: pipe PLL to enable
1428  *
1429  * Enable @pipe's PLL so we can start pumping pixels from a plane.  Check to
1430  * make sure the PLL reg is writable first though, since the panel write
1431  * protect mechanism may be enabled.
1432  *
1433  * Note!  This is for pre-ILK only.
1434  *
1435  * Unfortunately needed by dvo_ns2501 since the dvo depends on it running.
1436  */
1437 static void intel_enable_pll(struct drm_i915_private *dev_priv, enum pipe pipe)
1438 {
1439         int reg;
1440         u32 val;
1441
1442         /* No really, not for ILK+ */
1443         BUG_ON(!IS_VALLEYVIEW(dev_priv->dev) && dev_priv->info->gen >= 5);
1444
1445         /* PLL is protected by panel, make sure we can write it */
1446         if (IS_MOBILE(dev_priv->dev) && !IS_I830(dev_priv->dev))
1447                 assert_panel_unlocked(dev_priv, pipe);
1448
1449         reg = DPLL(pipe);
1450         val = I915_READ(reg);
1451         val |= DPLL_VCO_ENABLE;
1452
1453         /* We do this three times for luck */
1454         I915_WRITE(reg, val);
1455         POSTING_READ(reg);
1456         udelay(150); /* wait for warmup */
1457         I915_WRITE(reg, val);
1458         POSTING_READ(reg);
1459         udelay(150); /* wait for warmup */
1460         I915_WRITE(reg, val);
1461         POSTING_READ(reg);
1462         udelay(150); /* wait for warmup */
1463 }
1464
1465 /**
1466  * intel_disable_pll - disable a PLL
1467  * @dev_priv: i915 private structure
1468  * @pipe: pipe PLL to disable
1469  *
1470  * Disable the PLL for @pipe, making sure the pipe is off first.
1471  *
1472  * Note!  This is for pre-ILK only.
1473  */
1474 static void intel_disable_pll(struct drm_i915_private *dev_priv, enum pipe pipe)
1475 {
1476         int reg;
1477         u32 val;
1478
1479         /* Don't disable pipe A or pipe A PLLs if needed */
1480         if (pipe == PIPE_A && (dev_priv->quirks & QUIRK_PIPEA_FORCE))
1481                 return;
1482
1483         /* Make sure the pipe isn't still relying on us */
1484         assert_pipe_disabled(dev_priv, pipe);
1485
1486         reg = DPLL(pipe);
1487         val = I915_READ(reg);
1488         val &= ~DPLL_VCO_ENABLE;
1489         I915_WRITE(reg, val);
1490         POSTING_READ(reg);
1491 }
1492
1493 /* SBI access */
1494 static void
1495 intel_sbi_write(struct drm_i915_private *dev_priv, u16 reg, u32 value)
1496 {
1497         unsigned long flags;
1498
1499         spin_lock_irqsave(&dev_priv->dpio_lock, flags);
1500         if (wait_for((I915_READ(SBI_CTL_STAT) & SBI_BUSY) == 0,
1501                                 100)) {
1502                 DRM_ERROR("timeout waiting for SBI to become ready\n");
1503                 goto out_unlock;
1504         }
1505
1506         I915_WRITE(SBI_ADDR,
1507                         (reg << 16));
1508         I915_WRITE(SBI_DATA,
1509                         value);
1510         I915_WRITE(SBI_CTL_STAT,
1511                         SBI_BUSY |
1512                         SBI_CTL_OP_CRWR);
1513
1514         if (wait_for((I915_READ(SBI_CTL_STAT) & (SBI_BUSY | SBI_RESPONSE_FAIL)) == 0,
1515                                 100)) {
1516                 DRM_ERROR("timeout waiting for SBI to complete write transaction\n");
1517                 goto out_unlock;
1518         }
1519
1520 out_unlock:
1521         spin_unlock_irqrestore(&dev_priv->dpio_lock, flags);
1522 }
1523
1524 static u32
1525 intel_sbi_read(struct drm_i915_private *dev_priv, u16 reg)
1526 {
1527         unsigned long flags;
1528         u32 value = 0;
1529
1530         spin_lock_irqsave(&dev_priv->dpio_lock, flags);
1531         if (wait_for((I915_READ(SBI_CTL_STAT) & SBI_BUSY) == 0,
1532                                 100)) {
1533                 DRM_ERROR("timeout waiting for SBI to become ready\n");
1534                 goto out_unlock;
1535         }
1536
1537         I915_WRITE(SBI_ADDR,
1538                         (reg << 16));
1539         I915_WRITE(SBI_CTL_STAT,
1540                         SBI_BUSY |
1541                         SBI_CTL_OP_CRRD);
1542
1543         if (wait_for((I915_READ(SBI_CTL_STAT) & (SBI_BUSY | SBI_RESPONSE_FAIL)) == 0,
1544                                 100)) {
1545                 DRM_ERROR("timeout waiting for SBI to complete read transaction\n");
1546                 goto out_unlock;
1547         }
1548
1549         value = I915_READ(SBI_DATA);
1550
1551 out_unlock:
1552         spin_unlock_irqrestore(&dev_priv->dpio_lock, flags);
1553         return value;
1554 }
1555
1556 /**
1557  * intel_enable_pch_pll - enable PCH PLL
1558  * @dev_priv: i915 private structure
1559  * @pipe: pipe PLL to enable
1560  *
1561  * The PCH PLL needs to be enabled before the PCH transcoder, since it
1562  * drives the transcoder clock.
1563  */
1564 static void intel_enable_pch_pll(struct intel_crtc *intel_crtc)
1565 {
1566         struct drm_i915_private *dev_priv = intel_crtc->base.dev->dev_private;
1567         struct intel_pch_pll *pll;
1568         int reg;
1569         u32 val;
1570
1571         /* PCH PLLs only available on ILK, SNB and IVB */
1572         BUG_ON(dev_priv->info->gen < 5);
1573         pll = intel_crtc->pch_pll;
1574         if (pll == NULL)
1575                 return;
1576
1577         if (WARN_ON(pll->refcount == 0))
1578                 return;
1579
1580         DRM_DEBUG_KMS("enable PCH PLL %x (active %d, on? %d)for crtc %d\n",
1581                       pll->pll_reg, pll->active, pll->on,
1582                       intel_crtc->base.base.id);
1583
1584         /* PCH refclock must be enabled first */
1585         assert_pch_refclk_enabled(dev_priv);
1586
1587         if (pll->active++ && pll->on) {
1588                 assert_pch_pll_enabled(dev_priv, pll, NULL);
1589                 return;
1590         }
1591
1592         DRM_DEBUG_KMS("enabling PCH PLL %x\n", pll->pll_reg);
1593
1594         reg = pll->pll_reg;
1595         val = I915_READ(reg);
1596         val |= DPLL_VCO_ENABLE;
1597         I915_WRITE(reg, val);
1598         POSTING_READ(reg);
1599         udelay(200);
1600
1601         pll->on = true;
1602 }
1603
1604 static void intel_disable_pch_pll(struct intel_crtc *intel_crtc)
1605 {
1606         struct drm_i915_private *dev_priv = intel_crtc->base.dev->dev_private;
1607         struct intel_pch_pll *pll = intel_crtc->pch_pll;
1608         int reg;
1609         u32 val;
1610
1611         /* PCH only available on ILK+ */
1612         BUG_ON(dev_priv->info->gen < 5);
1613         if (pll == NULL)
1614                return;
1615
1616         if (WARN_ON(pll->refcount == 0))
1617                 return;
1618
1619         DRM_DEBUG_KMS("disable PCH PLL %x (active %d, on? %d) for crtc %d\n",
1620                       pll->pll_reg, pll->active, pll->on,
1621                       intel_crtc->base.base.id);
1622
1623         if (WARN_ON(pll->active == 0)) {
1624                 assert_pch_pll_disabled(dev_priv, pll, NULL);
1625                 return;
1626         }
1627
1628         if (--pll->active) {
1629                 assert_pch_pll_enabled(dev_priv, pll, NULL);
1630                 return;
1631         }
1632
1633         DRM_DEBUG_KMS("disabling PCH PLL %x\n", pll->pll_reg);
1634
1635         /* Make sure transcoder isn't still depending on us */
1636         assert_transcoder_disabled(dev_priv, intel_crtc->pipe);
1637
1638         reg = pll->pll_reg;
1639         val = I915_READ(reg);
1640         val &= ~DPLL_VCO_ENABLE;
1641         I915_WRITE(reg, val);
1642         POSTING_READ(reg);
1643         udelay(200);
1644
1645         pll->on = false;
1646 }
1647
1648 static void intel_enable_transcoder(struct drm_i915_private *dev_priv,
1649                                     enum pipe pipe)
1650 {
1651         int reg;
1652         u32 val, pipeconf_val;
1653         struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe];
1654
1655         /* PCH only available on ILK+ */
1656         BUG_ON(dev_priv->info->gen < 5);
1657
1658         /* Make sure PCH DPLL is enabled */
1659         assert_pch_pll_enabled(dev_priv,
1660                                to_intel_crtc(crtc)->pch_pll,
1661                                to_intel_crtc(crtc));
1662
1663         /* FDI must be feeding us bits for PCH ports */
1664         assert_fdi_tx_enabled(dev_priv, pipe);
1665         assert_fdi_rx_enabled(dev_priv, pipe);
1666
1667         if (IS_HASWELL(dev_priv->dev) && pipe > 0) {
1668                 DRM_ERROR("Attempting to enable transcoder on Haswell with pipe > 0\n");
1669                 return;
1670         }
1671         reg = TRANSCONF(pipe);
1672         val = I915_READ(reg);
1673         pipeconf_val = I915_READ(PIPECONF(pipe));
1674
1675         if (HAS_PCH_IBX(dev_priv->dev)) {
1676                 /*
1677                  * make the BPC in transcoder be consistent with
1678                  * that in pipeconf reg.
1679                  */
1680                 val &= ~PIPE_BPC_MASK;
1681                 val |= pipeconf_val & PIPE_BPC_MASK;
1682         }
1683
1684         val &= ~TRANS_INTERLACE_MASK;
1685         if ((pipeconf_val & PIPECONF_INTERLACE_MASK) == PIPECONF_INTERLACED_ILK)
1686                 if (HAS_PCH_IBX(dev_priv->dev) &&
1687                     intel_pipe_has_type(crtc, INTEL_OUTPUT_SDVO))
1688                         val |= TRANS_LEGACY_INTERLACED_ILK;
1689                 else
1690                         val |= TRANS_INTERLACED;
1691         else
1692                 val |= TRANS_PROGRESSIVE;
1693
1694         I915_WRITE(reg, val | TRANS_ENABLE);
1695         if (wait_for(I915_READ(reg) & TRANS_STATE_ENABLE, 100))
1696                 DRM_ERROR("failed to enable transcoder %d\n", pipe);
1697 }
1698
1699 static void intel_disable_transcoder(struct drm_i915_private *dev_priv,
1700                                      enum pipe pipe)
1701 {
1702         int reg;
1703         u32 val;
1704
1705         /* FDI relies on the transcoder */
1706         assert_fdi_tx_disabled(dev_priv, pipe);
1707         assert_fdi_rx_disabled(dev_priv, pipe);
1708
1709         /* Ports must be off as well */
1710         assert_pch_ports_disabled(dev_priv, pipe);
1711
1712         reg = TRANSCONF(pipe);
1713         val = I915_READ(reg);
1714         val &= ~TRANS_ENABLE;
1715         I915_WRITE(reg, val);
1716         /* wait for PCH transcoder off, transcoder state */
1717         if (wait_for((I915_READ(reg) & TRANS_STATE_ENABLE) == 0, 50))
1718                 DRM_ERROR("failed to disable transcoder %d\n", pipe);
1719 }
1720
1721 /**
1722  * intel_enable_pipe - enable a pipe, asserting requirements
1723  * @dev_priv: i915 private structure
1724  * @pipe: pipe to enable
1725  * @pch_port: on ILK+, is this pipe driving a PCH port or not
1726  *
1727  * Enable @pipe, making sure that various hardware specific requirements
1728  * are met, if applicable, e.g. PLL enabled, LVDS pairs enabled, etc.
1729  *
1730  * @pipe should be %PIPE_A or %PIPE_B.
1731  *
1732  * Will wait until the pipe is actually running (i.e. first vblank) before
1733  * returning.
1734  */
1735 static void intel_enable_pipe(struct drm_i915_private *dev_priv, enum pipe pipe,
1736                               bool pch_port)
1737 {
1738         int reg;
1739         u32 val;
1740
1741         /*
1742          * A pipe without a PLL won't actually be able to drive bits from
1743          * a plane.  On ILK+ the pipe PLLs are integrated, so we don't
1744          * need the check.
1745          */
1746         if (!HAS_PCH_SPLIT(dev_priv->dev))
1747                 assert_pll_enabled(dev_priv, pipe);
1748         else {
1749                 if (pch_port) {
1750                         /* if driving the PCH, we need FDI enabled */
1751                         assert_fdi_rx_pll_enabled(dev_priv, pipe);
1752                         assert_fdi_tx_pll_enabled(dev_priv, pipe);
1753                 }
1754                 /* FIXME: assert CPU port conditions for SNB+ */
1755         }
1756
1757         reg = PIPECONF(pipe);
1758         val = I915_READ(reg);
1759         if (val & PIPECONF_ENABLE)
1760                 return;
1761
1762         I915_WRITE(reg, val | PIPECONF_ENABLE);
1763         intel_wait_for_vblank(dev_priv->dev, pipe);
1764 }
1765
1766 /**
1767  * intel_disable_pipe - disable a pipe, asserting requirements
1768  * @dev_priv: i915 private structure
1769  * @pipe: pipe to disable
1770  *
1771  * Disable @pipe, making sure that various hardware specific requirements
1772  * are met, if applicable, e.g. plane disabled, panel fitter off, etc.
1773  *
1774  * @pipe should be %PIPE_A or %PIPE_B.
1775  *
1776  * Will wait until the pipe has shut down before returning.
1777  */
1778 static void intel_disable_pipe(struct drm_i915_private *dev_priv,
1779                                enum pipe pipe)
1780 {
1781         int reg;
1782         u32 val;
1783
1784         /*
1785          * Make sure planes won't keep trying to pump pixels to us,
1786          * or we might hang the display.
1787          */
1788         assert_planes_disabled(dev_priv, pipe);
1789
1790         /* Don't disable pipe A or pipe A PLLs if needed */
1791         if (pipe == PIPE_A && (dev_priv->quirks & QUIRK_PIPEA_FORCE))
1792                 return;
1793
1794         reg = PIPECONF(pipe);
1795         val = I915_READ(reg);
1796         if ((val & PIPECONF_ENABLE) == 0)
1797                 return;
1798
1799         I915_WRITE(reg, val & ~PIPECONF_ENABLE);
1800         intel_wait_for_pipe_off(dev_priv->dev, pipe);
1801 }
1802
1803 /*
1804  * Plane regs are double buffered, going from enabled->disabled needs a
1805  * trigger in order to latch.  The display address reg provides this.
1806  */
1807 void intel_flush_display_plane(struct drm_i915_private *dev_priv,
1808                                       enum plane plane)
1809 {
1810         I915_WRITE(DSPADDR(plane), I915_READ(DSPADDR(plane)));
1811         I915_WRITE(DSPSURF(plane), I915_READ(DSPSURF(plane)));
1812 }
1813
1814 /**
1815  * intel_enable_plane - enable a display plane on a given pipe
1816  * @dev_priv: i915 private structure
1817  * @plane: plane to enable
1818  * @pipe: pipe being fed
1819  *
1820  * Enable @plane on @pipe, making sure that @pipe is running first.
1821  */
1822 static void intel_enable_plane(struct drm_i915_private *dev_priv,
1823                                enum plane plane, enum pipe pipe)
1824 {
1825         int reg;
1826         u32 val;
1827
1828         /* If the pipe isn't enabled, we can't pump pixels and may hang */
1829         assert_pipe_enabled(dev_priv, pipe);
1830
1831         reg = DSPCNTR(plane);
1832         val = I915_READ(reg);
1833         if (val & DISPLAY_PLANE_ENABLE)
1834                 return;
1835
1836         I915_WRITE(reg, val | DISPLAY_PLANE_ENABLE);
1837         intel_flush_display_plane(dev_priv, plane);
1838         intel_wait_for_vblank(dev_priv->dev, pipe);
1839 }
1840
1841 /**
1842  * intel_disable_plane - disable a display plane
1843  * @dev_priv: i915 private structure
1844  * @plane: plane to disable
1845  * @pipe: pipe consuming the data
1846  *
1847  * Disable @plane; should be an independent operation.
1848  */
1849 static void intel_disable_plane(struct drm_i915_private *dev_priv,
1850                                 enum plane plane, enum pipe pipe)
1851 {
1852         int reg;
1853         u32 val;
1854
1855         reg = DSPCNTR(plane);
1856         val = I915_READ(reg);
1857         if ((val & DISPLAY_PLANE_ENABLE) == 0)
1858                 return;
1859
1860         I915_WRITE(reg, val & ~DISPLAY_PLANE_ENABLE);
1861         intel_flush_display_plane(dev_priv, plane);
1862         intel_wait_for_vblank(dev_priv->dev, pipe);
1863 }
1864
1865 int
1866 intel_pin_and_fence_fb_obj(struct drm_device *dev,
1867                            struct drm_i915_gem_object *obj,
1868                            struct intel_ring_buffer *pipelined)
1869 {
1870         struct drm_i915_private *dev_priv = dev->dev_private;
1871         u32 alignment;
1872         int ret;
1873
1874         switch (obj->tiling_mode) {
1875         case I915_TILING_NONE:
1876                 if (IS_BROADWATER(dev) || IS_CRESTLINE(dev))
1877                         alignment = 128 * 1024;
1878                 else if (INTEL_INFO(dev)->gen >= 4)
1879                         alignment = 4 * 1024;
1880                 else
1881                         alignment = 64 * 1024;
1882                 break;
1883         case I915_TILING_X:
1884                 /* pin() will align the object as required by fence */
1885                 alignment = 0;
1886                 break;
1887         case I915_TILING_Y:
1888                 /* FIXME: Is this true? */
1889                 DRM_ERROR("Y tiled not allowed for scan out buffers\n");
1890                 return -EINVAL;
1891         default:
1892                 BUG();
1893         }
1894
1895         dev_priv->mm.interruptible = false;
1896         ret = i915_gem_object_pin_to_display_plane(obj, alignment, pipelined);
1897         if (ret)
1898                 goto err_interruptible;
1899
1900         /* Install a fence for tiled scan-out. Pre-i965 always needs a
1901          * fence, whereas 965+ only requires a fence if using
1902          * framebuffer compression.  For simplicity, we always install
1903          * a fence as the cost is not that onerous.
1904          */
1905         ret = i915_gem_object_get_fence(obj);
1906         if (ret)
1907                 goto err_unpin;
1908
1909         i915_gem_object_pin_fence(obj);
1910
1911         dev_priv->mm.interruptible = true;
1912         return 0;
1913
1914 err_unpin:
1915         i915_gem_object_unpin(obj);
1916 err_interruptible:
1917         dev_priv->mm.interruptible = true;
1918         return ret;
1919 }
1920
1921 void intel_unpin_fb_obj(struct drm_i915_gem_object *obj)
1922 {
1923         i915_gem_object_unpin_fence(obj);
1924         i915_gem_object_unpin(obj);
1925 }
1926
1927 /* Computes the linear offset to the base tile and adjusts x, y. bytes per pixel
1928  * is assumed to be a power-of-two. */
1929 static unsigned long gen4_compute_dspaddr_offset_xtiled(int *x, int *y,
1930                                                         unsigned int bpp,
1931                                                         unsigned int pitch)
1932 {
1933         int tile_rows, tiles;
1934
1935         tile_rows = *y / 8;
1936         *y %= 8;
1937         tiles = *x / (512/bpp);
1938         *x %= 512/bpp;
1939
1940         return tile_rows * pitch * 8 + tiles * 4096;
1941 }
1942
1943 static int i9xx_update_plane(struct drm_crtc *crtc, struct drm_framebuffer *fb,
1944                              int x, int y)
1945 {
1946         struct drm_device *dev = crtc->dev;
1947         struct drm_i915_private *dev_priv = dev->dev_private;
1948         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
1949         struct intel_framebuffer *intel_fb;
1950         struct drm_i915_gem_object *obj;
1951         int plane = intel_crtc->plane;
1952         unsigned long linear_offset;
1953         u32 dspcntr;
1954         u32 reg;
1955
1956         switch (plane) {
1957         case 0:
1958         case 1:
1959                 break;
1960         default:
1961                 DRM_ERROR("Can't update plane %d in SAREA\n", plane);
1962                 return -EINVAL;
1963         }
1964
1965         intel_fb = to_intel_framebuffer(fb);
1966         obj = intel_fb->obj;
1967
1968         reg = DSPCNTR(plane);
1969         dspcntr = I915_READ(reg);
1970         /* Mask out pixel format bits in case we change it */
1971         dspcntr &= ~DISPPLANE_PIXFORMAT_MASK;
1972         switch (fb->bits_per_pixel) {
1973         case 8:
1974                 dspcntr |= DISPPLANE_8BPP;
1975                 break;
1976         case 16:
1977                 if (fb->depth == 15)
1978                         dspcntr |= DISPPLANE_15_16BPP;
1979                 else
1980                         dspcntr |= DISPPLANE_16BPP;
1981                 break;
1982         case 24:
1983         case 32:
1984                 dspcntr |= DISPPLANE_32BPP_NO_ALPHA;
1985                 break;
1986         default:
1987                 DRM_ERROR("Unknown color depth %d\n", fb->bits_per_pixel);
1988                 return -EINVAL;
1989         }
1990         if (INTEL_INFO(dev)->gen >= 4) {
1991                 if (obj->tiling_mode != I915_TILING_NONE)
1992                         dspcntr |= DISPPLANE_TILED;
1993                 else
1994                         dspcntr &= ~DISPPLANE_TILED;
1995         }
1996
1997         I915_WRITE(reg, dspcntr);
1998
1999         linear_offset = y * fb->pitches[0] + x * (fb->bits_per_pixel / 8);
2000
2001         if (INTEL_INFO(dev)->gen >= 4) {
2002                 intel_crtc->dspaddr_offset =
2003                         gen4_compute_dspaddr_offset_xtiled(&x, &y,
2004                                                            fb->bits_per_pixel / 8,
2005                                                            fb->pitches[0]);
2006                 linear_offset -= intel_crtc->dspaddr_offset;
2007         } else {
2008                 intel_crtc->dspaddr_offset = linear_offset;
2009         }
2010
2011         DRM_DEBUG_KMS("Writing base %08X %08lX %d %d %d\n",
2012                       obj->gtt_offset, linear_offset, x, y, fb->pitches[0]);
2013         I915_WRITE(DSPSTRIDE(plane), fb->pitches[0]);
2014         if (INTEL_INFO(dev)->gen >= 4) {
2015                 I915_MODIFY_DISPBASE(DSPSURF(plane),
2016                                      obj->gtt_offset + intel_crtc->dspaddr_offset);
2017                 I915_WRITE(DSPTILEOFF(plane), (y << 16) | x);
2018                 I915_WRITE(DSPLINOFF(plane), linear_offset);
2019         } else
2020                 I915_WRITE(DSPADDR(plane), obj->gtt_offset + linear_offset);
2021         POSTING_READ(reg);
2022
2023         return 0;
2024 }
2025
2026 static int ironlake_update_plane(struct drm_crtc *crtc,
2027                                  struct drm_framebuffer *fb, int x, int y)
2028 {
2029         struct drm_device *dev = crtc->dev;
2030         struct drm_i915_private *dev_priv = dev->dev_private;
2031         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2032         struct intel_framebuffer *intel_fb;
2033         struct drm_i915_gem_object *obj;
2034         int plane = intel_crtc->plane;
2035         unsigned long linear_offset;
2036         u32 dspcntr;
2037         u32 reg;
2038
2039         switch (plane) {
2040         case 0:
2041         case 1:
2042         case 2:
2043                 break;
2044         default:
2045                 DRM_ERROR("Can't update plane %d in SAREA\n", plane);
2046                 return -EINVAL;
2047         }
2048
2049         intel_fb = to_intel_framebuffer(fb);
2050         obj = intel_fb->obj;
2051
2052         reg = DSPCNTR(plane);
2053         dspcntr = I915_READ(reg);
2054         /* Mask out pixel format bits in case we change it */
2055         dspcntr &= ~DISPPLANE_PIXFORMAT_MASK;
2056         switch (fb->bits_per_pixel) {
2057         case 8:
2058                 dspcntr |= DISPPLANE_8BPP;
2059                 break;
2060         case 16:
2061                 if (fb->depth != 16)
2062                         return -EINVAL;
2063
2064                 dspcntr |= DISPPLANE_16BPP;
2065                 break;
2066         case 24:
2067         case 32:
2068                 if (fb->depth == 24)
2069                         dspcntr |= DISPPLANE_32BPP_NO_ALPHA;
2070                 else if (fb->depth == 30)
2071                         dspcntr |= DISPPLANE_32BPP_30BIT_NO_ALPHA;
2072                 else
2073                         return -EINVAL;
2074                 break;
2075         default:
2076                 DRM_ERROR("Unknown color depth %d\n", fb->bits_per_pixel);
2077                 return -EINVAL;
2078         }
2079
2080         if (obj->tiling_mode != I915_TILING_NONE)
2081                 dspcntr |= DISPPLANE_TILED;
2082         else
2083                 dspcntr &= ~DISPPLANE_TILED;
2084
2085         /* must disable */
2086         dspcntr |= DISPPLANE_TRICKLE_FEED_DISABLE;
2087
2088         I915_WRITE(reg, dspcntr);
2089
2090         linear_offset = y * fb->pitches[0] + x * (fb->bits_per_pixel / 8);
2091         intel_crtc->dspaddr_offset =
2092                 gen4_compute_dspaddr_offset_xtiled(&x, &y,
2093                                                    fb->bits_per_pixel / 8,
2094                                                    fb->pitches[0]);
2095         linear_offset -= intel_crtc->dspaddr_offset;
2096
2097         DRM_DEBUG_KMS("Writing base %08X %08lX %d %d %d\n",
2098                       obj->gtt_offset, linear_offset, x, y, fb->pitches[0]);
2099         I915_WRITE(DSPSTRIDE(plane), fb->pitches[0]);
2100         I915_MODIFY_DISPBASE(DSPSURF(plane),
2101                              obj->gtt_offset + intel_crtc->dspaddr_offset);
2102         I915_WRITE(DSPTILEOFF(plane), (y << 16) | x);
2103         I915_WRITE(DSPLINOFF(plane), linear_offset);
2104         POSTING_READ(reg);
2105
2106         return 0;
2107 }
2108
2109 /* Assume fb object is pinned & idle & fenced and just update base pointers */
2110 static int
2111 intel_pipe_set_base_atomic(struct drm_crtc *crtc, struct drm_framebuffer *fb,
2112                            int x, int y, enum mode_set_atomic state)
2113 {
2114         struct drm_device *dev = crtc->dev;
2115         struct drm_i915_private *dev_priv = dev->dev_private;
2116
2117         if (dev_priv->display.disable_fbc)
2118                 dev_priv->display.disable_fbc(dev);
2119         intel_increase_pllclock(crtc);
2120
2121         return dev_priv->display.update_plane(crtc, fb, x, y);
2122 }
2123
2124 static int
2125 intel_finish_fb(struct drm_framebuffer *old_fb)
2126 {
2127         struct drm_i915_gem_object *obj = to_intel_framebuffer(old_fb)->obj;
2128         struct drm_i915_private *dev_priv = obj->base.dev->dev_private;
2129         bool was_interruptible = dev_priv->mm.interruptible;
2130         int ret;
2131
2132         wait_event(dev_priv->pending_flip_queue,
2133                    atomic_read(&dev_priv->mm.wedged) ||
2134                    atomic_read(&obj->pending_flip) == 0);
2135
2136         /* Big Hammer, we also need to ensure that any pending
2137          * MI_WAIT_FOR_EVENT inside a user batch buffer on the
2138          * current scanout is retired before unpinning the old
2139          * framebuffer.
2140          *
2141          * This should only fail upon a hung GPU, in which case we
2142          * can safely continue.
2143          */
2144         dev_priv->mm.interruptible = false;
2145         ret = i915_gem_object_finish_gpu(obj);
2146         dev_priv->mm.interruptible = was_interruptible;
2147
2148         return ret;
2149 }
2150
2151 static int
2152 intel_pipe_set_base(struct drm_crtc *crtc, int x, int y,
2153                     struct drm_framebuffer *fb)
2154 {
2155         struct drm_device *dev = crtc->dev;
2156         struct drm_i915_private *dev_priv = dev->dev_private;
2157         struct drm_i915_master_private *master_priv;
2158         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2159         struct drm_framebuffer *old_fb;
2160         int ret;
2161
2162         /* no fb bound */
2163         if (!fb) {
2164                 DRM_ERROR("No FB bound\n");
2165                 return 0;
2166         }
2167
2168         if(intel_crtc->plane > dev_priv->num_pipe) {
2169                 DRM_ERROR("no plane for crtc: plane %d, num_pipes %d\n",
2170                                 intel_crtc->plane,
2171                                 dev_priv->num_pipe);
2172                 return -EINVAL;
2173         }
2174
2175         mutex_lock(&dev->struct_mutex);
2176         ret = intel_pin_and_fence_fb_obj(dev,
2177                                          to_intel_framebuffer(fb)->obj,
2178                                          NULL);
2179         if (ret != 0) {
2180                 mutex_unlock(&dev->struct_mutex);
2181                 DRM_ERROR("pin & fence failed\n");
2182                 return ret;
2183         }
2184
2185         if (crtc->fb)
2186                 intel_finish_fb(crtc->fb);
2187
2188         ret = dev_priv->display.update_plane(crtc, fb, x, y);
2189         if (ret) {
2190                 intel_unpin_fb_obj(to_intel_framebuffer(fb)->obj);
2191                 mutex_unlock(&dev->struct_mutex);
2192                 DRM_ERROR("failed to update base address\n");
2193                 return ret;
2194         }
2195
2196         old_fb = crtc->fb;
2197         crtc->fb = fb;
2198         crtc->x = x;
2199         crtc->y = y;
2200
2201         if (old_fb) {
2202                 intel_wait_for_vblank(dev, intel_crtc->pipe);
2203                 intel_unpin_fb_obj(to_intel_framebuffer(old_fb)->obj);
2204         }
2205
2206         intel_update_fbc(dev);
2207         mutex_unlock(&dev->struct_mutex);
2208
2209         if (!dev->primary->master)
2210                 return 0;
2211
2212         master_priv = dev->primary->master->driver_priv;
2213         if (!master_priv->sarea_priv)
2214                 return 0;
2215
2216         if (intel_crtc->pipe) {
2217                 master_priv->sarea_priv->pipeB_x = x;
2218                 master_priv->sarea_priv->pipeB_y = y;
2219         } else {
2220                 master_priv->sarea_priv->pipeA_x = x;
2221                 master_priv->sarea_priv->pipeA_y = y;
2222         }
2223
2224         return 0;
2225 }
2226
2227 static void ironlake_set_pll_edp(struct drm_crtc *crtc, int clock)
2228 {
2229         struct drm_device *dev = crtc->dev;
2230         struct drm_i915_private *dev_priv = dev->dev_private;
2231         u32 dpa_ctl;
2232
2233         DRM_DEBUG_KMS("eDP PLL enable for clock %d\n", clock);
2234         dpa_ctl = I915_READ(DP_A);
2235         dpa_ctl &= ~DP_PLL_FREQ_MASK;
2236
2237         if (clock < 200000) {
2238                 u32 temp;
2239                 dpa_ctl |= DP_PLL_FREQ_160MHZ;
2240                 /* workaround for 160Mhz:
2241                    1) program 0x4600c bits 15:0 = 0x8124
2242                    2) program 0x46010 bit 0 = 1
2243                    3) program 0x46034 bit 24 = 1
2244                    4) program 0x64000 bit 14 = 1
2245                    */
2246                 temp = I915_READ(0x4600c);
2247                 temp &= 0xffff0000;
2248                 I915_WRITE(0x4600c, temp | 0x8124);
2249
2250                 temp = I915_READ(0x46010);
2251                 I915_WRITE(0x46010, temp | 1);
2252
2253                 temp = I915_READ(0x46034);
2254                 I915_WRITE(0x46034, temp | (1 << 24));
2255         } else {
2256                 dpa_ctl |= DP_PLL_FREQ_270MHZ;
2257         }
2258         I915_WRITE(DP_A, dpa_ctl);
2259
2260         POSTING_READ(DP_A);
2261         udelay(500);
2262 }
2263
2264 static void intel_fdi_normal_train(struct drm_crtc *crtc)
2265 {
2266         struct drm_device *dev = crtc->dev;
2267         struct drm_i915_private *dev_priv = dev->dev_private;
2268         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2269         int pipe = intel_crtc->pipe;
2270         u32 reg, temp;
2271
2272         /* enable normal train */
2273         reg = FDI_TX_CTL(pipe);
2274         temp = I915_READ(reg);
2275         if (IS_IVYBRIDGE(dev)) {
2276                 temp &= ~FDI_LINK_TRAIN_NONE_IVB;
2277                 temp |= FDI_LINK_TRAIN_NONE_IVB | FDI_TX_ENHANCE_FRAME_ENABLE;
2278         } else {
2279                 temp &= ~FDI_LINK_TRAIN_NONE;
2280                 temp |= FDI_LINK_TRAIN_NONE | FDI_TX_ENHANCE_FRAME_ENABLE;
2281         }
2282         I915_WRITE(reg, temp);
2283
2284         reg = FDI_RX_CTL(pipe);
2285         temp = I915_READ(reg);
2286         if (HAS_PCH_CPT(dev)) {
2287                 temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
2288                 temp |= FDI_LINK_TRAIN_NORMAL_CPT;
2289         } else {
2290                 temp &= ~FDI_LINK_TRAIN_NONE;
2291                 temp |= FDI_LINK_TRAIN_NONE;
2292         }
2293         I915_WRITE(reg, temp | FDI_RX_ENHANCE_FRAME_ENABLE);
2294
2295         /* wait one idle pattern time */
2296         POSTING_READ(reg);
2297         udelay(1000);
2298
2299         /* IVB wants error correction enabled */
2300         if (IS_IVYBRIDGE(dev))
2301                 I915_WRITE(reg, I915_READ(reg) | FDI_FS_ERRC_ENABLE |
2302                            FDI_FE_ERRC_ENABLE);
2303 }
2304
2305 static void cpt_phase_pointer_enable(struct drm_device *dev, int pipe)
2306 {
2307         struct drm_i915_private *dev_priv = dev->dev_private;
2308         u32 flags = I915_READ(SOUTH_CHICKEN1);
2309
2310         flags |= FDI_PHASE_SYNC_OVR(pipe);
2311         I915_WRITE(SOUTH_CHICKEN1, flags); /* once to unlock... */
2312         flags |= FDI_PHASE_SYNC_EN(pipe);
2313         I915_WRITE(SOUTH_CHICKEN1, flags); /* then again to enable */
2314         POSTING_READ(SOUTH_CHICKEN1);
2315 }
2316
2317 /* The FDI link training functions for ILK/Ibexpeak. */
2318 static void ironlake_fdi_link_train(struct drm_crtc *crtc)
2319 {
2320         struct drm_device *dev = crtc->dev;
2321         struct drm_i915_private *dev_priv = dev->dev_private;
2322         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2323         int pipe = intel_crtc->pipe;
2324         int plane = intel_crtc->plane;
2325         u32 reg, temp, tries;
2326
2327         /* FDI needs bits from pipe & plane first */
2328         assert_pipe_enabled(dev_priv, pipe);
2329         assert_plane_enabled(dev_priv, plane);
2330
2331         /* Train 1: umask FDI RX Interrupt symbol_lock and bit_lock bit
2332            for train result */
2333         reg = FDI_RX_IMR(pipe);
2334         temp = I915_READ(reg);
2335         temp &= ~FDI_RX_SYMBOL_LOCK;
2336         temp &= ~FDI_RX_BIT_LOCK;
2337         I915_WRITE(reg, temp);
2338         I915_READ(reg);
2339         udelay(150);
2340
2341         /* enable CPU FDI TX and PCH FDI RX */
2342         reg = FDI_TX_CTL(pipe);
2343         temp = I915_READ(reg);
2344         temp &= ~(7 << 19);
2345         temp |= (intel_crtc->fdi_lanes - 1) << 19;
2346         temp &= ~FDI_LINK_TRAIN_NONE;
2347         temp |= FDI_LINK_TRAIN_PATTERN_1;
2348         I915_WRITE(reg, temp | FDI_TX_ENABLE);
2349
2350         reg = FDI_RX_CTL(pipe);
2351         temp = I915_READ(reg);
2352         temp &= ~FDI_LINK_TRAIN_NONE;
2353         temp |= FDI_LINK_TRAIN_PATTERN_1;
2354         I915_WRITE(reg, temp | FDI_RX_ENABLE);
2355
2356         POSTING_READ(reg);
2357         udelay(150);
2358
2359         /* Ironlake workaround, enable clock pointer after FDI enable*/
2360         if (HAS_PCH_IBX(dev)) {
2361                 I915_WRITE(FDI_RX_CHICKEN(pipe), FDI_RX_PHASE_SYNC_POINTER_OVR);
2362                 I915_WRITE(FDI_RX_CHICKEN(pipe), FDI_RX_PHASE_SYNC_POINTER_OVR |
2363                            FDI_RX_PHASE_SYNC_POINTER_EN);
2364         }
2365
2366         reg = FDI_RX_IIR(pipe);
2367         for (tries = 0; tries < 5; tries++) {
2368                 temp = I915_READ(reg);
2369                 DRM_DEBUG_KMS("FDI_RX_IIR 0x%x\n", temp);
2370
2371                 if ((temp & FDI_RX_BIT_LOCK)) {
2372                         DRM_DEBUG_KMS("FDI train 1 done.\n");
2373                         I915_WRITE(reg, temp | FDI_RX_BIT_LOCK);
2374                         break;
2375                 }
2376         }
2377         if (tries == 5)
2378                 DRM_ERROR("FDI train 1 fail!\n");
2379
2380         /* Train 2 */
2381         reg = FDI_TX_CTL(pipe);
2382         temp = I915_READ(reg);
2383         temp &= ~FDI_LINK_TRAIN_NONE;
2384         temp |= FDI_LINK_TRAIN_PATTERN_2;
2385         I915_WRITE(reg, temp);
2386
2387         reg = FDI_RX_CTL(pipe);
2388         temp = I915_READ(reg);
2389         temp &= ~FDI_LINK_TRAIN_NONE;
2390         temp |= FDI_LINK_TRAIN_PATTERN_2;
2391         I915_WRITE(reg, temp);
2392
2393         POSTING_READ(reg);
2394         udelay(150);
2395
2396         reg = FDI_RX_IIR(pipe);
2397         for (tries = 0; tries < 5; tries++) {
2398                 temp = I915_READ(reg);
2399                 DRM_DEBUG_KMS("FDI_RX_IIR 0x%x\n", temp);
2400
2401                 if (temp & FDI_RX_SYMBOL_LOCK) {
2402                         I915_WRITE(reg, temp | FDI_RX_SYMBOL_LOCK);
2403                         DRM_DEBUG_KMS("FDI train 2 done.\n");
2404                         break;
2405                 }
2406         }
2407         if (tries == 5)
2408                 DRM_ERROR("FDI train 2 fail!\n");
2409
2410         DRM_DEBUG_KMS("FDI train done\n");
2411
2412 }
2413
2414 static const int snb_b_fdi_train_param[] = {
2415         FDI_LINK_TRAIN_400MV_0DB_SNB_B,
2416         FDI_LINK_TRAIN_400MV_6DB_SNB_B,
2417         FDI_LINK_TRAIN_600MV_3_5DB_SNB_B,
2418         FDI_LINK_TRAIN_800MV_0DB_SNB_B,
2419 };
2420
2421 /* The FDI link training functions for SNB/Cougarpoint. */
2422 static void gen6_fdi_link_train(struct drm_crtc *crtc)
2423 {
2424         struct drm_device *dev = crtc->dev;
2425         struct drm_i915_private *dev_priv = dev->dev_private;
2426         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2427         int pipe = intel_crtc->pipe;
2428         u32 reg, temp, i, retry;
2429
2430         /* Train 1: umask FDI RX Interrupt symbol_lock and bit_lock bit
2431            for train result */
2432         reg = FDI_RX_IMR(pipe);
2433         temp = I915_READ(reg);
2434         temp &= ~FDI_RX_SYMBOL_LOCK;
2435         temp &= ~FDI_RX_BIT_LOCK;
2436         I915_WRITE(reg, temp);
2437
2438         POSTING_READ(reg);
2439         udelay(150);
2440
2441         /* enable CPU FDI TX and PCH FDI RX */
2442         reg = FDI_TX_CTL(pipe);
2443         temp = I915_READ(reg);
2444         temp &= ~(7 << 19);
2445         temp |= (intel_crtc->fdi_lanes - 1) << 19;
2446         temp &= ~FDI_LINK_TRAIN_NONE;
2447         temp |= FDI_LINK_TRAIN_PATTERN_1;
2448         temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
2449         /* SNB-B */
2450         temp |= FDI_LINK_TRAIN_400MV_0DB_SNB_B;
2451         I915_WRITE(reg, temp | FDI_TX_ENABLE);
2452
2453         reg = FDI_RX_CTL(pipe);
2454         temp = I915_READ(reg);
2455         if (HAS_PCH_CPT(dev)) {
2456                 temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
2457                 temp |= FDI_LINK_TRAIN_PATTERN_1_CPT;
2458         } else {
2459                 temp &= ~FDI_LINK_TRAIN_NONE;
2460                 temp |= FDI_LINK_TRAIN_PATTERN_1;
2461         }
2462         I915_WRITE(reg, temp | FDI_RX_ENABLE);
2463
2464         POSTING_READ(reg);
2465         udelay(150);
2466
2467         if (HAS_PCH_CPT(dev))
2468                 cpt_phase_pointer_enable(dev, pipe);
2469
2470         for (i = 0; i < 4; i++) {
2471                 reg = FDI_TX_CTL(pipe);
2472                 temp = I915_READ(reg);
2473                 temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
2474                 temp |= snb_b_fdi_train_param[i];
2475                 I915_WRITE(reg, temp);
2476
2477                 POSTING_READ(reg);
2478                 udelay(500);
2479
2480                 for (retry = 0; retry < 5; retry++) {
2481                         reg = FDI_RX_IIR(pipe);
2482                         temp = I915_READ(reg);
2483                         DRM_DEBUG_KMS("FDI_RX_IIR 0x%x\n", temp);
2484                         if (temp & FDI_RX_BIT_LOCK) {
2485                                 I915_WRITE(reg, temp | FDI_RX_BIT_LOCK);
2486                                 DRM_DEBUG_KMS("FDI train 1 done.\n");
2487                                 break;
2488                         }
2489                         udelay(50);
2490                 }
2491                 if (retry < 5)
2492                         break;
2493         }
2494         if (i == 4)
2495                 DRM_ERROR("FDI train 1 fail!\n");
2496
2497         /* Train 2 */
2498         reg = FDI_TX_CTL(pipe);
2499         temp = I915_READ(reg);
2500         temp &= ~FDI_LINK_TRAIN_NONE;
2501         temp |= FDI_LINK_TRAIN_PATTERN_2;
2502         if (IS_GEN6(dev)) {
2503                 temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
2504                 /* SNB-B */
2505                 temp |= FDI_LINK_TRAIN_400MV_0DB_SNB_B;
2506         }
2507         I915_WRITE(reg, temp);
2508
2509         reg = FDI_RX_CTL(pipe);
2510         temp = I915_READ(reg);
2511         if (HAS_PCH_CPT(dev)) {
2512                 temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
2513                 temp |= FDI_LINK_TRAIN_PATTERN_2_CPT;
2514         } else {
2515                 temp &= ~FDI_LINK_TRAIN_NONE;
2516                 temp |= FDI_LINK_TRAIN_PATTERN_2;
2517         }
2518         I915_WRITE(reg, temp);
2519
2520         POSTING_READ(reg);
2521         udelay(150);
2522
2523         for (i = 0; i < 4; i++) {
2524                 reg = FDI_TX_CTL(pipe);
2525                 temp = I915_READ(reg);
2526                 temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
2527                 temp |= snb_b_fdi_train_param[i];
2528                 I915_WRITE(reg, temp);
2529
2530                 POSTING_READ(reg);
2531                 udelay(500);
2532
2533                 for (retry = 0; retry < 5; retry++) {
2534                         reg = FDI_RX_IIR(pipe);
2535                         temp = I915_READ(reg);
2536                         DRM_DEBUG_KMS("FDI_RX_IIR 0x%x\n", temp);
2537                         if (temp & FDI_RX_SYMBOL_LOCK) {
2538                                 I915_WRITE(reg, temp | FDI_RX_SYMBOL_LOCK);
2539                                 DRM_DEBUG_KMS("FDI train 2 done.\n");
2540                                 break;
2541                         }
2542                         udelay(50);
2543                 }
2544                 if (retry < 5)
2545                         break;
2546         }
2547         if (i == 4)
2548                 DRM_ERROR("FDI train 2 fail!\n");
2549
2550         DRM_DEBUG_KMS("FDI train done.\n");
2551 }
2552
2553 /* Manual link training for Ivy Bridge A0 parts */
2554 static void ivb_manual_fdi_link_train(struct drm_crtc *crtc)
2555 {
2556         struct drm_device *dev = crtc->dev;
2557         struct drm_i915_private *dev_priv = dev->dev_private;
2558         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2559         int pipe = intel_crtc->pipe;
2560         u32 reg, temp, i;
2561
2562         /* Train 1: umask FDI RX Interrupt symbol_lock and bit_lock bit
2563            for train result */
2564         reg = FDI_RX_IMR(pipe);
2565         temp = I915_READ(reg);
2566         temp &= ~FDI_RX_SYMBOL_LOCK;
2567         temp &= ~FDI_RX_BIT_LOCK;
2568         I915_WRITE(reg, temp);
2569
2570         POSTING_READ(reg);
2571         udelay(150);
2572
2573         /* enable CPU FDI TX and PCH FDI RX */
2574         reg = FDI_TX_CTL(pipe);
2575         temp = I915_READ(reg);
2576         temp &= ~(7 << 19);
2577         temp |= (intel_crtc->fdi_lanes - 1) << 19;
2578         temp &= ~(FDI_LINK_TRAIN_AUTO | FDI_LINK_TRAIN_NONE_IVB);
2579         temp |= FDI_LINK_TRAIN_PATTERN_1_IVB;
2580         temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
2581         temp |= FDI_LINK_TRAIN_400MV_0DB_SNB_B;
2582         temp |= FDI_COMPOSITE_SYNC;
2583         I915_WRITE(reg, temp | FDI_TX_ENABLE);
2584
2585         reg = FDI_RX_CTL(pipe);
2586         temp = I915_READ(reg);
2587         temp &= ~FDI_LINK_TRAIN_AUTO;
2588         temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
2589         temp |= FDI_LINK_TRAIN_PATTERN_1_CPT;
2590         temp |= FDI_COMPOSITE_SYNC;
2591         I915_WRITE(reg, temp | FDI_RX_ENABLE);
2592
2593         POSTING_READ(reg);
2594         udelay(150);
2595
2596         if (HAS_PCH_CPT(dev))
2597                 cpt_phase_pointer_enable(dev, pipe);
2598
2599         for (i = 0; i < 4; i++) {
2600                 reg = FDI_TX_CTL(pipe);
2601                 temp = I915_READ(reg);
2602                 temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
2603                 temp |= snb_b_fdi_train_param[i];
2604                 I915_WRITE(reg, temp);
2605
2606                 POSTING_READ(reg);
2607                 udelay(500);
2608
2609                 reg = FDI_RX_IIR(pipe);
2610                 temp = I915_READ(reg);
2611                 DRM_DEBUG_KMS("FDI_RX_IIR 0x%x\n", temp);
2612
2613                 if (temp & FDI_RX_BIT_LOCK ||
2614                     (I915_READ(reg) & FDI_RX_BIT_LOCK)) {
2615                         I915_WRITE(reg, temp | FDI_RX_BIT_LOCK);
2616                         DRM_DEBUG_KMS("FDI train 1 done.\n");
2617                         break;
2618                 }
2619         }
2620         if (i == 4)
2621                 DRM_ERROR("FDI train 1 fail!\n");
2622
2623         /* Train 2 */
2624         reg = FDI_TX_CTL(pipe);
2625         temp = I915_READ(reg);
2626         temp &= ~FDI_LINK_TRAIN_NONE_IVB;
2627         temp |= FDI_LINK_TRAIN_PATTERN_2_IVB;
2628         temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
2629         temp |= FDI_LINK_TRAIN_400MV_0DB_SNB_B;
2630         I915_WRITE(reg, temp);
2631
2632         reg = FDI_RX_CTL(pipe);
2633         temp = I915_READ(reg);
2634         temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
2635         temp |= FDI_LINK_TRAIN_PATTERN_2_CPT;
2636         I915_WRITE(reg, temp);
2637
2638         POSTING_READ(reg);
2639         udelay(150);
2640
2641         for (i = 0; i < 4; i++) {
2642                 reg = FDI_TX_CTL(pipe);
2643                 temp = I915_READ(reg);
2644                 temp &= ~FDI_LINK_TRAIN_VOL_EMP_MASK;
2645                 temp |= snb_b_fdi_train_param[i];
2646                 I915_WRITE(reg, temp);
2647
2648                 POSTING_READ(reg);
2649                 udelay(500);
2650
2651                 reg = FDI_RX_IIR(pipe);
2652                 temp = I915_READ(reg);
2653                 DRM_DEBUG_KMS("FDI_RX_IIR 0x%x\n", temp);
2654
2655                 if (temp & FDI_RX_SYMBOL_LOCK) {
2656                         I915_WRITE(reg, temp | FDI_RX_SYMBOL_LOCK);
2657                         DRM_DEBUG_KMS("FDI train 2 done.\n");
2658                         break;
2659                 }
2660         }
2661         if (i == 4)
2662                 DRM_ERROR("FDI train 2 fail!\n");
2663
2664         DRM_DEBUG_KMS("FDI train done.\n");
2665 }
2666
2667 static void ironlake_fdi_pll_enable(struct intel_crtc *intel_crtc)
2668 {
2669         struct drm_device *dev = intel_crtc->base.dev;
2670         struct drm_i915_private *dev_priv = dev->dev_private;
2671         int pipe = intel_crtc->pipe;
2672         u32 reg, temp;
2673
2674         /* Write the TU size bits so error detection works */
2675         I915_WRITE(FDI_RX_TUSIZE1(pipe),
2676                    I915_READ(PIPE_DATA_M1(pipe)) & TU_SIZE_MASK);
2677
2678         /* enable PCH FDI RX PLL, wait warmup plus DMI latency */
2679         reg = FDI_RX_CTL(pipe);
2680         temp = I915_READ(reg);
2681         temp &= ~((0x7 << 19) | (0x7 << 16));
2682         temp |= (intel_crtc->fdi_lanes - 1) << 19;
2683         temp |= (I915_READ(PIPECONF(pipe)) & PIPE_BPC_MASK) << 11;
2684         I915_WRITE(reg, temp | FDI_RX_PLL_ENABLE);
2685
2686         POSTING_READ(reg);
2687         udelay(200);
2688
2689         /* Switch from Rawclk to PCDclk */
2690         temp = I915_READ(reg);
2691         I915_WRITE(reg, temp | FDI_PCDCLK);
2692
2693         POSTING_READ(reg);
2694         udelay(200);
2695
2696         /* On Haswell, the PLL configuration for ports and pipes is handled
2697          * separately, as part of DDI setup */
2698         if (!IS_HASWELL(dev)) {
2699                 /* Enable CPU FDI TX PLL, always on for Ironlake */
2700                 reg = FDI_TX_CTL(pipe);
2701                 temp = I915_READ(reg);
2702                 if ((temp & FDI_TX_PLL_ENABLE) == 0) {
2703                         I915_WRITE(reg, temp | FDI_TX_PLL_ENABLE);
2704
2705                         POSTING_READ(reg);
2706                         udelay(100);
2707                 }
2708         }
2709 }
2710
2711 static void ironlake_fdi_pll_disable(struct intel_crtc *intel_crtc)
2712 {
2713         struct drm_device *dev = intel_crtc->base.dev;
2714         struct drm_i915_private *dev_priv = dev->dev_private;
2715         int pipe = intel_crtc->pipe;
2716         u32 reg, temp;
2717
2718         /* Switch from PCDclk to Rawclk */
2719         reg = FDI_RX_CTL(pipe);
2720         temp = I915_READ(reg);
2721         I915_WRITE(reg, temp & ~FDI_PCDCLK);
2722
2723         /* Disable CPU FDI TX PLL */
2724         reg = FDI_TX_CTL(pipe);
2725         temp = I915_READ(reg);
2726         I915_WRITE(reg, temp & ~FDI_TX_PLL_ENABLE);
2727
2728         POSTING_READ(reg);
2729         udelay(100);
2730
2731         reg = FDI_RX_CTL(pipe);
2732         temp = I915_READ(reg);
2733         I915_WRITE(reg, temp & ~FDI_RX_PLL_ENABLE);
2734
2735         /* Wait for the clocks to turn off. */
2736         POSTING_READ(reg);
2737         udelay(100);
2738 }
2739
2740 static void cpt_phase_pointer_disable(struct drm_device *dev, int pipe)
2741 {
2742         struct drm_i915_private *dev_priv = dev->dev_private;
2743         u32 flags = I915_READ(SOUTH_CHICKEN1);
2744
2745         flags &= ~(FDI_PHASE_SYNC_EN(pipe));
2746         I915_WRITE(SOUTH_CHICKEN1, flags); /* once to disable... */
2747         flags &= ~(FDI_PHASE_SYNC_OVR(pipe));
2748         I915_WRITE(SOUTH_CHICKEN1, flags); /* then again to lock */
2749         POSTING_READ(SOUTH_CHICKEN1);
2750 }
2751 static void ironlake_fdi_disable(struct drm_crtc *crtc)
2752 {
2753         struct drm_device *dev = crtc->dev;
2754         struct drm_i915_private *dev_priv = dev->dev_private;
2755         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2756         int pipe = intel_crtc->pipe;
2757         u32 reg, temp;
2758
2759         /* disable CPU FDI tx and PCH FDI rx */
2760         reg = FDI_TX_CTL(pipe);
2761         temp = I915_READ(reg);
2762         I915_WRITE(reg, temp & ~FDI_TX_ENABLE);
2763         POSTING_READ(reg);
2764
2765         reg = FDI_RX_CTL(pipe);
2766         temp = I915_READ(reg);
2767         temp &= ~(0x7 << 16);
2768         temp |= (I915_READ(PIPECONF(pipe)) & PIPE_BPC_MASK) << 11;
2769         I915_WRITE(reg, temp & ~FDI_RX_ENABLE);
2770
2771         POSTING_READ(reg);
2772         udelay(100);
2773
2774         /* Ironlake workaround, disable clock pointer after downing FDI */
2775         if (HAS_PCH_IBX(dev)) {
2776                 I915_WRITE(FDI_RX_CHICKEN(pipe), FDI_RX_PHASE_SYNC_POINTER_OVR);
2777                 I915_WRITE(FDI_RX_CHICKEN(pipe),
2778                            I915_READ(FDI_RX_CHICKEN(pipe) &
2779                                      ~FDI_RX_PHASE_SYNC_POINTER_EN));
2780         } else if (HAS_PCH_CPT(dev)) {
2781                 cpt_phase_pointer_disable(dev, pipe);
2782         }
2783
2784         /* still set train pattern 1 */
2785         reg = FDI_TX_CTL(pipe);
2786         temp = I915_READ(reg);
2787         temp &= ~FDI_LINK_TRAIN_NONE;
2788         temp |= FDI_LINK_TRAIN_PATTERN_1;
2789         I915_WRITE(reg, temp);
2790
2791         reg = FDI_RX_CTL(pipe);
2792         temp = I915_READ(reg);
2793         if (HAS_PCH_CPT(dev)) {
2794                 temp &= ~FDI_LINK_TRAIN_PATTERN_MASK_CPT;
2795                 temp |= FDI_LINK_TRAIN_PATTERN_1_CPT;
2796         } else {
2797                 temp &= ~FDI_LINK_TRAIN_NONE;
2798                 temp |= FDI_LINK_TRAIN_PATTERN_1;
2799         }
2800         /* BPC in FDI rx is consistent with that in PIPECONF */
2801         temp &= ~(0x07 << 16);
2802         temp |= (I915_READ(PIPECONF(pipe)) & PIPE_BPC_MASK) << 11;
2803         I915_WRITE(reg, temp);
2804
2805         POSTING_READ(reg);
2806         udelay(100);
2807 }
2808
2809 static bool intel_crtc_has_pending_flip(struct drm_crtc *crtc)
2810 {
2811         struct drm_device *dev = crtc->dev;
2812         struct drm_i915_private *dev_priv = dev->dev_private;
2813         unsigned long flags;
2814         bool pending;
2815
2816         if (atomic_read(&dev_priv->mm.wedged))
2817                 return false;
2818
2819         spin_lock_irqsave(&dev->event_lock, flags);
2820         pending = to_intel_crtc(crtc)->unpin_work != NULL;
2821         spin_unlock_irqrestore(&dev->event_lock, flags);
2822
2823         return pending;
2824 }
2825
2826 static void intel_crtc_wait_for_pending_flips(struct drm_crtc *crtc)
2827 {
2828         struct drm_device *dev = crtc->dev;
2829         struct drm_i915_private *dev_priv = dev->dev_private;
2830
2831         if (crtc->fb == NULL)
2832                 return;
2833
2834         wait_event(dev_priv->pending_flip_queue,
2835                    !intel_crtc_has_pending_flip(crtc));
2836
2837         mutex_lock(&dev->struct_mutex);
2838         intel_finish_fb(crtc->fb);
2839         mutex_unlock(&dev->struct_mutex);
2840 }
2841
2842 static bool intel_crtc_driving_pch(struct drm_crtc *crtc)
2843 {
2844         struct drm_device *dev = crtc->dev;
2845         struct intel_encoder *intel_encoder;
2846
2847         /*
2848          * If there's a non-PCH eDP on this crtc, it must be DP_A, and that
2849          * must be driven by its own crtc; no sharing is possible.
2850          */
2851         for_each_encoder_on_crtc(dev, crtc, intel_encoder) {
2852
2853                 /* On Haswell, LPT PCH handles the VGA connection via FDI, and Haswell
2854                  * CPU handles all others */
2855                 if (IS_HASWELL(dev)) {
2856                         /* It is still unclear how this will work on PPT, so throw up a warning */
2857                         WARN_ON(!HAS_PCH_LPT(dev));
2858
2859                         if (intel_encoder->type == INTEL_OUTPUT_ANALOG) {
2860                                 DRM_DEBUG_KMS("Haswell detected DAC encoder, assuming is PCH\n");
2861                                 return true;
2862                         } else {
2863                                 DRM_DEBUG_KMS("Haswell detected encoder %d, assuming is CPU\n",
2864                                               intel_encoder->type);
2865                                 return false;
2866                         }
2867                 }
2868
2869                 switch (intel_encoder->type) {
2870                 case INTEL_OUTPUT_EDP:
2871                         if (!intel_encoder_is_pch_edp(&intel_encoder->base))
2872                                 return false;
2873                         continue;
2874                 }
2875         }
2876
2877         return true;
2878 }
2879
2880 /* Program iCLKIP clock to the desired frequency */
2881 static void lpt_program_iclkip(struct drm_crtc *crtc)
2882 {
2883         struct drm_device *dev = crtc->dev;
2884         struct drm_i915_private *dev_priv = dev->dev_private;
2885         u32 divsel, phaseinc, auxdiv, phasedir = 0;
2886         u32 temp;
2887
2888         /* It is necessary to ungate the pixclk gate prior to programming
2889          * the divisors, and gate it back when it is done.
2890          */
2891         I915_WRITE(PIXCLK_GATE, PIXCLK_GATE_GATE);
2892
2893         /* Disable SSCCTL */
2894         intel_sbi_write(dev_priv, SBI_SSCCTL6,
2895                                 intel_sbi_read(dev_priv, SBI_SSCCTL6) |
2896                                         SBI_SSCCTL_DISABLE);
2897
2898         /* 20MHz is a corner case which is out of range for the 7-bit divisor */
2899         if (crtc->mode.clock == 20000) {
2900                 auxdiv = 1;
2901                 divsel = 0x41;
2902                 phaseinc = 0x20;
2903         } else {
2904                 /* The iCLK virtual clock root frequency is in MHz,
2905                  * but the crtc->mode.clock in in KHz. To get the divisors,
2906                  * it is necessary to divide one by another, so we
2907                  * convert the virtual clock precision to KHz here for higher
2908                  * precision.
2909                  */
2910                 u32 iclk_virtual_root_freq = 172800 * 1000;
2911                 u32 iclk_pi_range = 64;
2912                 u32 desired_divisor, msb_divisor_value, pi_value;
2913
2914                 desired_divisor = (iclk_virtual_root_freq / crtc->mode.clock);
2915                 msb_divisor_value = desired_divisor / iclk_pi_range;
2916                 pi_value = desired_divisor % iclk_pi_range;
2917
2918                 auxdiv = 0;
2919                 divsel = msb_divisor_value - 2;
2920                 phaseinc = pi_value;
2921         }
2922
2923         /* This should not happen with any sane values */
2924         WARN_ON(SBI_SSCDIVINTPHASE_DIVSEL(divsel) &
2925                 ~SBI_SSCDIVINTPHASE_DIVSEL_MASK);
2926         WARN_ON(SBI_SSCDIVINTPHASE_DIR(phasedir) &
2927                 ~SBI_SSCDIVINTPHASE_INCVAL_MASK);
2928
2929         DRM_DEBUG_KMS("iCLKIP clock: found settings for %dKHz refresh rate: auxdiv=%x, divsel=%x, phasedir=%x, phaseinc=%x\n",
2930                         crtc->mode.clock,
2931                         auxdiv,
2932                         divsel,
2933                         phasedir,
2934                         phaseinc);
2935
2936         /* Program SSCDIVINTPHASE6 */
2937         temp = intel_sbi_read(dev_priv, SBI_SSCDIVINTPHASE6);
2938         temp &= ~SBI_SSCDIVINTPHASE_DIVSEL_MASK;
2939         temp |= SBI_SSCDIVINTPHASE_DIVSEL(divsel);
2940         temp &= ~SBI_SSCDIVINTPHASE_INCVAL_MASK;
2941         temp |= SBI_SSCDIVINTPHASE_INCVAL(phaseinc);
2942         temp |= SBI_SSCDIVINTPHASE_DIR(phasedir);
2943         temp |= SBI_SSCDIVINTPHASE_PROPAGATE;
2944
2945         intel_sbi_write(dev_priv,
2946                         SBI_SSCDIVINTPHASE6,
2947                         temp);
2948
2949         /* Program SSCAUXDIV */
2950         temp = intel_sbi_read(dev_priv, SBI_SSCAUXDIV6);
2951         temp &= ~SBI_SSCAUXDIV_FINALDIV2SEL(1);
2952         temp |= SBI_SSCAUXDIV_FINALDIV2SEL(auxdiv);
2953         intel_sbi_write(dev_priv,
2954                         SBI_SSCAUXDIV6,
2955                         temp);
2956
2957
2958         /* Enable modulator and associated divider */
2959         temp = intel_sbi_read(dev_priv, SBI_SSCCTL6);
2960         temp &= ~SBI_SSCCTL_DISABLE;
2961         intel_sbi_write(dev_priv,
2962                         SBI_SSCCTL6,
2963                         temp);
2964
2965         /* Wait for initialization time */
2966         udelay(24);
2967
2968         I915_WRITE(PIXCLK_GATE, PIXCLK_GATE_UNGATE);
2969 }
2970
2971 /*
2972  * Enable PCH resources required for PCH ports:
2973  *   - PCH PLLs
2974  *   - FDI training & RX/TX
2975  *   - update transcoder timings
2976  *   - DP transcoding bits
2977  *   - transcoder
2978  */
2979 static void ironlake_pch_enable(struct drm_crtc *crtc)
2980 {
2981         struct drm_device *dev = crtc->dev;
2982         struct drm_i915_private *dev_priv = dev->dev_private;
2983         struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2984         int pipe = intel_crtc->pipe;
2985         u32 reg, temp;
2986
2987         assert_transcoder_disabled(dev_priv, pipe);
2988
2989         /* For PCH output, training FDI link */
2990         dev_priv->display.fdi_link_train(crtc);
2991
2992         intel_enable_pch_pll(intel_crtc);
2993
2994         if (HAS_PCH_LPT(dev)) {
2995                 DRM_DEBUG_KMS("LPT detected: programming iCLKIP\n");
2996                 lpt_program_iclkip(crtc);
2997         } else if (HAS_PCH_CPT(dev)) {
2998                 u32 sel;
2999
3000                 temp = I915_READ(PCH_DPLL_SEL);
3001                 switch (pipe) {
3002                 default:
3003                 case 0:
3004                         temp |= TRANSA_DPLL_ENABLE;
3005                         sel = TRANSA_DPLLB_SEL;
3006                         break;
3007                 case 1:
3008                         temp |= TRANSB_DPLL_ENABLE;
3009                         sel = TRANSB_DPLLB_SEL;
3010                         break;
3011                 case 2:
3012                         temp |= TRANSC_DPLL_ENABLE;
3013                         sel = TRANSC_DPLLB_SEL;
3014                         break;
3015                 }
3016                 if (intel_crtc->pch_pll->pll_reg == _PCH_DPLL_B)
3017                         temp |= sel;
3018                 else
3019                         temp &= ~sel;
3020                 I915_WRITE(PCH_DPLL_SEL, temp);
3021         }
3022
3023         /* set transcoder timing, panel must allow it */
3024         assert_panel_unlocked(dev_priv, pipe);
3025         I915_WRITE(TRANS_HTOTAL(pipe), I915_READ(HTOTAL(pipe)));
3026         I915_WRITE(TRANS_HBLANK(pipe), I915_READ(HBLANK(pipe)));
3027         I915_WRITE(TRANS_HSYNC(pipe),  I915_READ(HSYNC(pipe)));
3028
3029         I915_WRITE(TRANS_VTOTAL(pipe), I915_READ(VTOTAL(pipe)));
3030         I915_WRITE(TRANS_VBLANK(pipe), I915_READ(VBLANK(pipe)));
3031         I915_WRITE(TRANS_VSYNC(pipe),  I915_READ(VSYNC(pipe)));
3032         I915_WRITE(TRANS_VSYNCSHIFT(pipe),  I915_READ(VSYNCSHIFT(pipe)));
3033
3034         if (!IS_HASWELL(dev))
3035                 intel_fdi_normal_train(crtc);
3036
3037         /* For PCH DP, enable TRANS_DP_CTL */
3038         if (HAS_PCH_CPT(dev) &&
3039             (intel_pipe_has_type(crtc, INTEL_OUTPUT_DISPLAYPORT) ||
3040              intel_pipe_has_type(crtc, INTEL_OUTPUT_EDP))) {
3041                 u32 bpc = (I915_READ(PIPECONF(pipe)) & PIPE_BPC_MASK) >> 5;
3042                 reg = TRANS_DP_CTL(pipe);
3043                 temp = I915_READ(reg);
3044                 temp &= ~(TRANS_DP_PORT_SEL_MASK |
3045                           TRANS_DP_SYNC_MASK |
3046                           TRANS_DP_BPC_MASK);
3047                 temp |= (TRANS_DP_OUTPUT_ENABLE |
3048                          TRANS_DP_ENH_FRAMING);
3049                 temp |= bpc << 9; /* same format but at 11:9 */
3050
3051                 if (crtc->mode.flags & DRM_MODE_FLAG_PHSYNC)
3052                         temp |= TRANS_DP_HSYNC_ACTIVE_HIGH;
3053                 if (crtc->mode.flags & DRM_MODE_FLAG_PVSYNC)
3054                         temp |= TRANS_DP_VSYNC_ACTIVE_HIGH;
3055
3056                 switch (intel_trans_dp_port_sel(crtc)) {
3057                 case PCH_DP_B:
3058                         temp |= TRANS_DP_PORT_SEL_B;
3059                         break;
3060                 case PCH_DP_C:
3061                         temp |= TRANS_DP_PORT_SEL_C;
3062                         break;
3063                 case PCH_DP_D:
3064                         temp |= TRANS_DP_PORT_SEL_D;
3065                         break;
3066                 default:
3067                         DRM_DEBUG_KMS("Wrong PCH DP port return. Guess port B\n");
3068                         temp |= TRANS_DP_PORT_SEL_B;
3069                         break;
3070                 }
3071
3072                 I915_WRITE(reg, temp);
3073         }
3074
3075         intel_enable_transcoder(dev_priv, pipe);
3076 }
3077
3078 static void intel_put_pch_pll(struct intel_crtc *intel_crtc)
3079 {
3080         struct intel_pch_pll *pll = intel_crtc->pch_pll;
3081
3082         if (pll == NULL)
3083                 return;
3084
3085         if (pll->refcount == 0) {
3086                 WARN(1, "bad PCH PLL refcount\n");
3087                 return;
3088         }
3089
3090         --pll->refcount;
3091         intel_crtc->pch_pll = NULL;
3092 }
3093
3094 static struct intel_pch_pll *intel_get_pch_pll(struct intel_crtc *intel_crtc, u32 dpll, u32 fp)
3095 {
3096         struct drm_i915_private *dev_priv = intel_crtc->base.dev->dev_private;
3097         struct intel_pch_pll *pll;
3098         int i;
3099
3100         pll = intel_crtc->pch_pll;
3101         if (pll) {
3102                 DRM_DEBUG_KMS("CRTC:%d reusing existing PCH PLL %x\n",
3103                               intel_crtc->base.base.id, pll->pll_reg);
3104                 goto prepare;
3105         }
3106
3107         if (HAS_PCH_IBX(dev_priv->dev)) {
3108                 /* Ironlake PCH has a fixed PLL->PCH pipe mapping. */
3109                 i = intel_crtc->pipe;
3110                 pll = &dev_priv->pch_plls[i];
3111
3112                 DRM_DEBUG_KMS("CRTC:%d using pre-allocated PCH PLL %x\n",
3113                               intel_crtc->base.base.id, pll->pll_reg);
3114
3115                 goto found;
3116         }
3117
3118         for (i = 0; i < dev_priv->num_pch_pll; i++) {
3119                 pll = &dev_priv->pch_plls[i];
3120
3121                 /* Only want to check enabled timings first */
3122                 if (pll->refcount == 0)
3123                         continue;
3124
3125                 if (dpll == (I915_READ(pll->pll_reg) & 0x7fffffff) &&
3126                     fp == I915_READ(pll->fp0_reg)) {
3127                         DRM_DEBUG_KMS("CRTC:%d sharing existing PCH PLL %x (refcount %d, ative %d)\n",
3128                                       intel_crtc->base.base.id,
3129                                       pll->pll_reg, pll->refcount, pll->active);
3130
3131                         goto found;
3132                 }
3133         }
3134
3135         /* Ok no matching timings, maybe there's a free one? */
3136         for (i = 0; i < dev_priv->num_pch_pll; i++) {
3137                 pll = &dev_priv->pch_plls[i];
3138                 if (pll->refcount == 0) {
3139                         DRM_DEBUG_KMS("CRTC:%d allocated PCH PLL %x\n",
3140                                       intel_crtc->base.base.id, pll->pll_reg);
3141                         goto found;
3142                 }
3143         }
3144
3145         return NULL;
3146
3147 found:
3148         intel_crtc->pch_pll = pll;
3149         pll->refcount++;
3150         DRM_DEBUG_DRIVER("using pll %d for pipe %d\n", i, intel_crtc->pipe);
3151 prepare: /* separate function? */
3152         DRM_DEBUG_DRIVER("switching PLL %x off\n", pll->pll_reg);
3153
3154         /* Wait for the clocks to stabilize before rewriting the regs */
3155         I915_WRITE(pll->pll_reg, dpll & ~DPLL_VCO_ENABLE);
3156         POSTING_READ(pll->pll_reg);
3157         udelay(150);
3158
3159         I915_WRITE(pll->fp0_reg, fp);
3160         I915_WRITE(pll->pll_reg, dpll & ~DPLL_VCO_ENABLE);
3161         pll->on = false;
3162         return pll;
3163 }
3164
3165 void intel_cpt_verify_modeset(struct drm_device *dev, int pipe)
3166 {
3167         struct drm_i915_private *dev_priv = dev->dev_private;
3168         int dslreg = PIPEDSL(pipe), tc2reg = TRANS_CHICKEN2(pipe);
3169         u32 temp;
3170
3171         temp = I915_READ(dslreg);
3172         udelay(500);
3173         if (wait_for(I915_READ(dslreg) != temp, 5)) {
3174                 /* Without this, mode sets may fail silently on FDI */