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1/*
2 * Copyright © 2012 Intel Corporation
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21 * IN THE SOFTWARE.
22 *
23 * Authors:
24 * Eugeni Dodonov <eugeni.dodonov@intel.com>
25 *
26 */
27
28#include "i915_drv.h"
29#include "intel_drv.h"
30
31struct ddi_buf_trans {
32 u32 trans1; /* balance leg enable, de-emph level */
33 u32 trans2; /* vref sel, vswing */
34 u8 i_boost; /* SKL: I_boost; valid: 0x0, 0x1, 0x3, 0x7 */
35};
36
37/* HDMI/DVI modes ignore everything but the last 2 items. So we share
38 * them for both DP and FDI transports, allowing those ports to
39 * automatically adapt to HDMI connections as well
40 */
41static const struct ddi_buf_trans hsw_ddi_translations_dp[] = {
42 { 0x00FFFFFF, 0x0006000E, 0x0 },
43 { 0x00D75FFF, 0x0005000A, 0x0 },
44 { 0x00C30FFF, 0x00040006, 0x0 },
45 { 0x80AAAFFF, 0x000B0000, 0x0 },
46 { 0x00FFFFFF, 0x0005000A, 0x0 },
47 { 0x00D75FFF, 0x000C0004, 0x0 },
48 { 0x80C30FFF, 0x000B0000, 0x0 },
49 { 0x00FFFFFF, 0x00040006, 0x0 },
50 { 0x80D75FFF, 0x000B0000, 0x0 },
51};
52
53static const struct ddi_buf_trans hsw_ddi_translations_fdi[] = {
54 { 0x00FFFFFF, 0x0007000E, 0x0 },
55 { 0x00D75FFF, 0x000F000A, 0x0 },
56 { 0x00C30FFF, 0x00060006, 0x0 },
57 { 0x00AAAFFF, 0x001E0000, 0x0 },
58 { 0x00FFFFFF, 0x000F000A, 0x0 },
59 { 0x00D75FFF, 0x00160004, 0x0 },
60 { 0x00C30FFF, 0x001E0000, 0x0 },
61 { 0x00FFFFFF, 0x00060006, 0x0 },
62 { 0x00D75FFF, 0x001E0000, 0x0 },
63};
64
65static const struct ddi_buf_trans hsw_ddi_translations_hdmi[] = {
66 /* Idx NT mV d T mV d db */
67 { 0x00FFFFFF, 0x0006000E, 0x0 },/* 0: 400 400 0 */
68 { 0x00E79FFF, 0x000E000C, 0x0 },/* 1: 400 500 2 */
69 { 0x00D75FFF, 0x0005000A, 0x0 },/* 2: 400 600 3.5 */
70 { 0x00FFFFFF, 0x0005000A, 0x0 },/* 3: 600 600 0 */
71 { 0x00E79FFF, 0x001D0007, 0x0 },/* 4: 600 750 2 */
72 { 0x00D75FFF, 0x000C0004, 0x0 },/* 5: 600 900 3.5 */
73 { 0x00FFFFFF, 0x00040006, 0x0 },/* 6: 800 800 0 */
74 { 0x80E79FFF, 0x00030002, 0x0 },/* 7: 800 1000 2 */
75 { 0x00FFFFFF, 0x00140005, 0x0 },/* 8: 850 850 0 */
76 { 0x00FFFFFF, 0x000C0004, 0x0 },/* 9: 900 900 0 */
77 { 0x00FFFFFF, 0x001C0003, 0x0 },/* 10: 950 950 0 */
78 { 0x80FFFFFF, 0x00030002, 0x0 },/* 11: 1000 1000 0 */
79};
80
81static const struct ddi_buf_trans bdw_ddi_translations_edp[] = {
82 { 0x00FFFFFF, 0x00000012, 0x0 },
83 { 0x00EBAFFF, 0x00020011, 0x0 },
84 { 0x00C71FFF, 0x0006000F, 0x0 },
85 { 0x00AAAFFF, 0x000E000A, 0x0 },
86 { 0x00FFFFFF, 0x00020011, 0x0 },
87 { 0x00DB6FFF, 0x0005000F, 0x0 },
88 { 0x00BEEFFF, 0x000A000C, 0x0 },
89 { 0x00FFFFFF, 0x0005000F, 0x0 },
90 { 0x00DB6FFF, 0x000A000C, 0x0 },
91};
92
93static const struct ddi_buf_trans bdw_ddi_translations_dp[] = {
94 { 0x00FFFFFF, 0x0007000E, 0x0 },
95 { 0x00D75FFF, 0x000E000A, 0x0 },
96 { 0x00BEFFFF, 0x00140006, 0x0 },
97 { 0x80B2CFFF, 0x001B0002, 0x0 },
98 { 0x00FFFFFF, 0x000E000A, 0x0 },
99 { 0x00DB6FFF, 0x00160005, 0x0 },
100 { 0x80C71FFF, 0x001A0002, 0x0 },
101 { 0x00F7DFFF, 0x00180004, 0x0 },
102 { 0x80D75FFF, 0x001B0002, 0x0 },
103};
104
105static const struct ddi_buf_trans bdw_ddi_translations_fdi[] = {
106 { 0x00FFFFFF, 0x0001000E, 0x0 },
107 { 0x00D75FFF, 0x0004000A, 0x0 },
108 { 0x00C30FFF, 0x00070006, 0x0 },
109 { 0x00AAAFFF, 0x000C0000, 0x0 },
110 { 0x00FFFFFF, 0x0004000A, 0x0 },
111 { 0x00D75FFF, 0x00090004, 0x0 },
112 { 0x00C30FFF, 0x000C0000, 0x0 },
113 { 0x00FFFFFF, 0x00070006, 0x0 },
114 { 0x00D75FFF, 0x000C0000, 0x0 },
115};
116
117static const struct ddi_buf_trans bdw_ddi_translations_hdmi[] = {
118 /* Idx NT mV d T mV df db */
119 { 0x00FFFFFF, 0x0007000E, 0x0 },/* 0: 400 400 0 */
120 { 0x00D75FFF, 0x000E000A, 0x0 },/* 1: 400 600 3.5 */
121 { 0x00BEFFFF, 0x00140006, 0x0 },/* 2: 400 800 6 */
122 { 0x00FFFFFF, 0x0009000D, 0x0 },/* 3: 450 450 0 */
123 { 0x00FFFFFF, 0x000E000A, 0x0 },/* 4: 600 600 0 */
124 { 0x00D7FFFF, 0x00140006, 0x0 },/* 5: 600 800 2.5 */
125 { 0x80CB2FFF, 0x001B0002, 0x0 },/* 6: 600 1000 4.5 */
126 { 0x00FFFFFF, 0x00140006, 0x0 },/* 7: 800 800 0 */
127 { 0x80E79FFF, 0x001B0002, 0x0 },/* 8: 800 1000 2 */
128 { 0x80FFFFFF, 0x001B0002, 0x0 },/* 9: 1000 1000 0 */
129};
130
131/* Skylake H and S */
132static const struct ddi_buf_trans skl_ddi_translations_dp[] = {
133 { 0x00002016, 0x000000A0, 0x0 },
134 { 0x00005012, 0x0000009B, 0x0 },
135 { 0x00007011, 0x00000088, 0x0 },
136 { 0x80009010, 0x000000C0, 0x1 },
137 { 0x00002016, 0x0000009B, 0x0 },
138 { 0x00005012, 0x00000088, 0x0 },
139 { 0x80007011, 0x000000C0, 0x1 },
140 { 0x00002016, 0x000000DF, 0x0 },
141 { 0x80005012, 0x000000C0, 0x1 },
142};
143
144/* Skylake U */
145static const struct ddi_buf_trans skl_u_ddi_translations_dp[] = {
146 { 0x0000201B, 0x000000A2, 0x0 },
147 { 0x00005012, 0x00000088, 0x0 },
148 { 0x80007011, 0x000000CD, 0x1 },
149 { 0x80009010, 0x000000C0, 0x1 },
150 { 0x0000201B, 0x0000009D, 0x0 },
151 { 0x80005012, 0x000000C0, 0x1 },
152 { 0x80007011, 0x000000C0, 0x1 },
153 { 0x00002016, 0x00000088, 0x0 },
154 { 0x80005012, 0x000000C0, 0x1 },
155};
156
157/* Skylake Y */
158static const struct ddi_buf_trans skl_y_ddi_translations_dp[] = {
159 { 0x00000018, 0x000000A2, 0x0 },
160 { 0x00005012, 0x00000088, 0x0 },
161 { 0x80007011, 0x000000CD, 0x3 },
162 { 0x80009010, 0x000000C0, 0x3 },
163 { 0x00000018, 0x0000009D, 0x0 },
164 { 0x80005012, 0x000000C0, 0x3 },
165 { 0x80007011, 0x000000C0, 0x3 },
166 { 0x00000018, 0x00000088, 0x0 },
167 { 0x80005012, 0x000000C0, 0x3 },
168};
169
170/* Kabylake H and S */
171static const struct ddi_buf_trans kbl_ddi_translations_dp[] = {
172 { 0x00002016, 0x000000A0, 0x0 },
173 { 0x00005012, 0x0000009B, 0x0 },
174 { 0x00007011, 0x00000088, 0x0 },
175 { 0x80009010, 0x000000C0, 0x1 },
176 { 0x00002016, 0x0000009B, 0x0 },
177 { 0x00005012, 0x00000088, 0x0 },
178 { 0x80007011, 0x000000C0, 0x1 },
179 { 0x00002016, 0x00000097, 0x0 },
180 { 0x80005012, 0x000000C0, 0x1 },
181};
182
183/* Kabylake U */
184static const struct ddi_buf_trans kbl_u_ddi_translations_dp[] = {
185 { 0x0000201B, 0x000000A1, 0x0 },
186 { 0x00005012, 0x00000088, 0x0 },
187 { 0x80007011, 0x000000CD, 0x3 },
188 { 0x80009010, 0x000000C0, 0x3 },
189 { 0x0000201B, 0x0000009D, 0x0 },
190 { 0x80005012, 0x000000C0, 0x3 },
191 { 0x80007011, 0x000000C0, 0x3 },
192 { 0x00002016, 0x0000004F, 0x0 },
193 { 0x80005012, 0x000000C0, 0x3 },
194};
195
196/* Kabylake Y */
197static const struct ddi_buf_trans kbl_y_ddi_translations_dp[] = {
198 { 0x00001017, 0x000000A1, 0x0 },
199 { 0x00005012, 0x00000088, 0x0 },
200 { 0x80007011, 0x000000CD, 0x3 },
201 { 0x8000800F, 0x000000C0, 0x3 },
202 { 0x00001017, 0x0000009D, 0x0 },
203 { 0x80005012, 0x000000C0, 0x3 },
204 { 0x80007011, 0x000000C0, 0x3 },
205 { 0x00001017, 0x0000004C, 0x0 },
206 { 0x80005012, 0x000000C0, 0x3 },
207};
208
209/*
210 * Skylake/Kabylake H and S
211 * eDP 1.4 low vswing translation parameters
212 */
213static const struct ddi_buf_trans skl_ddi_translations_edp[] = {
214 { 0x00000018, 0x000000A8, 0x0 },
215 { 0x00004013, 0x000000A9, 0x0 },
216 { 0x00007011, 0x000000A2, 0x0 },
217 { 0x00009010, 0x0000009C, 0x0 },
218 { 0x00000018, 0x000000A9, 0x0 },
219 { 0x00006013, 0x000000A2, 0x0 },
220 { 0x00007011, 0x000000A6, 0x0 },
221 { 0x00000018, 0x000000AB, 0x0 },
222 { 0x00007013, 0x0000009F, 0x0 },
223 { 0x00000018, 0x000000DF, 0x0 },
224};
225
226/*
227 * Skylake/Kabylake U
228 * eDP 1.4 low vswing translation parameters
229 */
230static const struct ddi_buf_trans skl_u_ddi_translations_edp[] = {
231 { 0x00000018, 0x000000A8, 0x0 },
232 { 0x00004013, 0x000000A9, 0x0 },
233 { 0x00007011, 0x000000A2, 0x0 },
234 { 0x00009010, 0x0000009C, 0x0 },
235 { 0x00000018, 0x000000A9, 0x0 },
236 { 0x00006013, 0x000000A2, 0x0 },
237 { 0x00007011, 0x000000A6, 0x0 },
238 { 0x00002016, 0x000000AB, 0x0 },
239 { 0x00005013, 0x0000009F, 0x0 },
240 { 0x00000018, 0x000000DF, 0x0 },
241};
242
243/*
244 * Skylake/Kabylake Y
245 * eDP 1.4 low vswing translation parameters
246 */
247static const struct ddi_buf_trans skl_y_ddi_translations_edp[] = {
248 { 0x00000018, 0x000000A8, 0x0 },
249 { 0x00004013, 0x000000AB, 0x0 },
250 { 0x00007011, 0x000000A4, 0x0 },
251 { 0x00009010, 0x000000DF, 0x0 },
252 { 0x00000018, 0x000000AA, 0x0 },
253 { 0x00006013, 0x000000A4, 0x0 },
254 { 0x00007011, 0x0000009D, 0x0 },
255 { 0x00000018, 0x000000A0, 0x0 },
256 { 0x00006012, 0x000000DF, 0x0 },
257 { 0x00000018, 0x0000008A, 0x0 },
258};
259
260/* Skylake/Kabylake U, H and S */
261static const struct ddi_buf_trans skl_ddi_translations_hdmi[] = {
262 { 0x00000018, 0x000000AC, 0x0 },
263 { 0x00005012, 0x0000009D, 0x0 },
264 { 0x00007011, 0x00000088, 0x0 },
265 { 0x00000018, 0x000000A1, 0x0 },
266 { 0x00000018, 0x00000098, 0x0 },
267 { 0x00004013, 0x00000088, 0x0 },
268 { 0x80006012, 0x000000CD, 0x1 },
269 { 0x00000018, 0x000000DF, 0x0 },
270 { 0x80003015, 0x000000CD, 0x1 }, /* Default */
271 { 0x80003015, 0x000000C0, 0x1 },
272 { 0x80000018, 0x000000C0, 0x1 },
273};
274
275/* Skylake/Kabylake Y */
276static const struct ddi_buf_trans skl_y_ddi_translations_hdmi[] = {
277 { 0x00000018, 0x000000A1, 0x0 },
278 { 0x00005012, 0x000000DF, 0x0 },
279 { 0x80007011, 0x000000CB, 0x3 },
280 { 0x00000018, 0x000000A4, 0x0 },
281 { 0x00000018, 0x0000009D, 0x0 },
282 { 0x00004013, 0x00000080, 0x0 },
283 { 0x80006013, 0x000000C0, 0x3 },
284 { 0x00000018, 0x0000008A, 0x0 },
285 { 0x80003015, 0x000000C0, 0x3 }, /* Default */
286 { 0x80003015, 0x000000C0, 0x3 },
287 { 0x80000018, 0x000000C0, 0x3 },
288};
289
290struct bxt_ddi_buf_trans {
291 u32 margin; /* swing value */
292 u32 scale; /* scale value */
293 u32 enable; /* scale enable */
294 u32 deemphasis;
295 bool default_index; /* true if the entry represents default value */
296};
297
298static const struct bxt_ddi_buf_trans bxt_ddi_translations_dp[] = {
299 /* Idx NT mV diff db */
300 { 52, 0x9A, 0, 128, true }, /* 0: 400 0 */
301 { 78, 0x9A, 0, 85, false }, /* 1: 400 3.5 */
302 { 104, 0x9A, 0, 64, false }, /* 2: 400 6 */
303 { 154, 0x9A, 0, 43, false }, /* 3: 400 9.5 */
304 { 77, 0x9A, 0, 128, false }, /* 4: 600 0 */
305 { 116, 0x9A, 0, 85, false }, /* 5: 600 3.5 */
306 { 154, 0x9A, 0, 64, false }, /* 6: 600 6 */
307 { 102, 0x9A, 0, 128, false }, /* 7: 800 0 */
308 { 154, 0x9A, 0, 85, false }, /* 8: 800 3.5 */
309 { 154, 0x9A, 1, 128, false }, /* 9: 1200 0 */
310};
311
312static const struct bxt_ddi_buf_trans bxt_ddi_translations_edp[] = {
313 /* Idx NT mV diff db */
314 { 26, 0, 0, 128, false }, /* 0: 200 0 */
315 { 38, 0, 0, 112, false }, /* 1: 200 1.5 */
316 { 48, 0, 0, 96, false }, /* 2: 200 4 */
317 { 54, 0, 0, 69, false }, /* 3: 200 6 */
318 { 32, 0, 0, 128, false }, /* 4: 250 0 */
319 { 48, 0, 0, 104, false }, /* 5: 250 1.5 */
320 { 54, 0, 0, 85, false }, /* 6: 250 4 */
321 { 43, 0, 0, 128, false }, /* 7: 300 0 */
322 { 54, 0, 0, 101, false }, /* 8: 300 1.5 */
323 { 48, 0, 0, 128, false }, /* 9: 300 0 */
324};
325
326/* BSpec has 2 recommended values - entries 0 and 8.
327 * Using the entry with higher vswing.
328 */
329static const struct bxt_ddi_buf_trans bxt_ddi_translations_hdmi[] = {
330 /* Idx NT mV diff db */
331 { 52, 0x9A, 0, 128, false }, /* 0: 400 0 */
332 { 52, 0x9A, 0, 85, false }, /* 1: 400 3.5 */
333 { 52, 0x9A, 0, 64, false }, /* 2: 400 6 */
334 { 42, 0x9A, 0, 43, false }, /* 3: 400 9.5 */
335 { 77, 0x9A, 0, 128, false }, /* 4: 600 0 */
336 { 77, 0x9A, 0, 85, false }, /* 5: 600 3.5 */
337 { 77, 0x9A, 0, 64, false }, /* 6: 600 6 */
338 { 102, 0x9A, 0, 128, false }, /* 7: 800 0 */
339 { 102, 0x9A, 0, 85, false }, /* 8: 800 3.5 */
340 { 154, 0x9A, 1, 128, true }, /* 9: 1200 0 */
341};
342
343enum port intel_ddi_get_encoder_port(struct intel_encoder *encoder)
344{
345 switch (encoder->type) {
346 case INTEL_OUTPUT_DP_MST:
347 return enc_to_mst(&encoder->base)->primary->port;
348 case INTEL_OUTPUT_DP:
349 case INTEL_OUTPUT_EDP:
350 case INTEL_OUTPUT_HDMI:
351 case INTEL_OUTPUT_UNKNOWN:
352 return enc_to_dig_port(&encoder->base)->port;
353 case INTEL_OUTPUT_ANALOG:
354 return PORT_E;
355 default:
356 MISSING_CASE(encoder->type);
357 return PORT_A;
358 }
359}
360
361static const struct ddi_buf_trans *
362bdw_get_buf_trans_edp(struct drm_i915_private *dev_priv, int *n_entries)
363{
364 if (dev_priv->vbt.edp.low_vswing) {
365 *n_entries = ARRAY_SIZE(bdw_ddi_translations_edp);
366 return bdw_ddi_translations_edp;
367 } else {
368 *n_entries = ARRAY_SIZE(bdw_ddi_translations_dp);
369 return bdw_ddi_translations_dp;
370 }
371}
372
373static const struct ddi_buf_trans *
374skl_get_buf_trans_dp(struct drm_i915_private *dev_priv, int *n_entries)
375{
376 if (IS_SKL_ULX(dev_priv)) {
377 *n_entries = ARRAY_SIZE(skl_y_ddi_translations_dp);
378 return skl_y_ddi_translations_dp;
379 } else if (IS_SKL_ULT(dev_priv)) {
380 *n_entries = ARRAY_SIZE(skl_u_ddi_translations_dp);
381 return skl_u_ddi_translations_dp;
382 } else {
383 *n_entries = ARRAY_SIZE(skl_ddi_translations_dp);
384 return skl_ddi_translations_dp;
385 }
386}
387
388static const struct ddi_buf_trans *
389kbl_get_buf_trans_dp(struct drm_i915_private *dev_priv, int *n_entries)
390{
391 if (IS_KBL_ULX(dev_priv)) {
392 *n_entries = ARRAY_SIZE(kbl_y_ddi_translations_dp);
393 return kbl_y_ddi_translations_dp;
394 } else if (IS_KBL_ULT(dev_priv)) {
395 *n_entries = ARRAY_SIZE(kbl_u_ddi_translations_dp);
396 return kbl_u_ddi_translations_dp;
397 } else {
398 *n_entries = ARRAY_SIZE(kbl_ddi_translations_dp);
399 return kbl_ddi_translations_dp;
400 }
401}
402
403static const struct ddi_buf_trans *
404skl_get_buf_trans_edp(struct drm_i915_private *dev_priv, int *n_entries)
405{
406 if (dev_priv->vbt.edp.low_vswing) {
407 if (IS_SKL_ULX(dev_priv) || IS_KBL_ULX(dev_priv)) {
408 *n_entries = ARRAY_SIZE(skl_y_ddi_translations_edp);
409 return skl_y_ddi_translations_edp;
410 } else if (IS_SKL_ULT(dev_priv) || IS_KBL_ULT(dev_priv)) {
411 *n_entries = ARRAY_SIZE(skl_u_ddi_translations_edp);
412 return skl_u_ddi_translations_edp;
413 } else {
414 *n_entries = ARRAY_SIZE(skl_ddi_translations_edp);
415 return skl_ddi_translations_edp;
416 }
417 }
418
419 if (IS_KABYLAKE(dev_priv))
420 return kbl_get_buf_trans_dp(dev_priv, n_entries);
421 else
422 return skl_get_buf_trans_dp(dev_priv, n_entries);
423}
424
425static const struct ddi_buf_trans *
426skl_get_buf_trans_hdmi(struct drm_i915_private *dev_priv, int *n_entries)
427{
428 if (IS_SKL_ULX(dev_priv) || IS_KBL_ULX(dev_priv)) {
429 *n_entries = ARRAY_SIZE(skl_y_ddi_translations_hdmi);
430 return skl_y_ddi_translations_hdmi;
431 } else {
432 *n_entries = ARRAY_SIZE(skl_ddi_translations_hdmi);
433 return skl_ddi_translations_hdmi;
434 }
435}
436
437static int intel_ddi_hdmi_level(struct drm_i915_private *dev_priv, enum port port)
438{
439 int n_hdmi_entries;
440 int hdmi_level;
441 int hdmi_default_entry;
442
443 hdmi_level = dev_priv->vbt.ddi_port_info[port].hdmi_level_shift;
444
445 if (IS_BROXTON(dev_priv))
446 return hdmi_level;
447
448 if (IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv)) {
449 skl_get_buf_trans_hdmi(dev_priv, &n_hdmi_entries);
450 hdmi_default_entry = 8;
451 } else if (IS_BROADWELL(dev_priv)) {
452 n_hdmi_entries = ARRAY_SIZE(bdw_ddi_translations_hdmi);
453 hdmi_default_entry = 7;
454 } else if (IS_HASWELL(dev_priv)) {
455 n_hdmi_entries = ARRAY_SIZE(hsw_ddi_translations_hdmi);
456 hdmi_default_entry = 6;
457 } else {
458 WARN(1, "ddi translation table missing\n");
459 n_hdmi_entries = ARRAY_SIZE(bdw_ddi_translations_hdmi);
460 hdmi_default_entry = 7;
461 }
462
463 /* Choose a good default if VBT is badly populated */
464 if (hdmi_level == HDMI_LEVEL_SHIFT_UNKNOWN ||
465 hdmi_level >= n_hdmi_entries)
466 hdmi_level = hdmi_default_entry;
467
468 return hdmi_level;
469}
470
471/*
472 * Starting with Haswell, DDI port buffers must be programmed with correct
473 * values in advance. This function programs the correct values for
474 * DP/eDP/FDI use cases.
475 */
476void intel_prepare_dp_ddi_buffers(struct intel_encoder *encoder)
477{
478 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
479 u32 iboost_bit = 0;
480 int i, n_dp_entries, n_edp_entries, size;
481 enum port port = intel_ddi_get_encoder_port(encoder);
482 const struct ddi_buf_trans *ddi_translations_fdi;
483 const struct ddi_buf_trans *ddi_translations_dp;
484 const struct ddi_buf_trans *ddi_translations_edp;
485 const struct ddi_buf_trans *ddi_translations;
486
487 if (IS_BROXTON(dev_priv))
488 return;
489
490 if (IS_KABYLAKE(dev_priv)) {
491 ddi_translations_fdi = NULL;
492 ddi_translations_dp =
493 kbl_get_buf_trans_dp(dev_priv, &n_dp_entries);
494 ddi_translations_edp =
495 skl_get_buf_trans_edp(dev_priv, &n_edp_entries);
496 } else if (IS_SKYLAKE(dev_priv)) {
497 ddi_translations_fdi = NULL;
498 ddi_translations_dp =
499 skl_get_buf_trans_dp(dev_priv, &n_dp_entries);
500 ddi_translations_edp =
501 skl_get_buf_trans_edp(dev_priv, &n_edp_entries);
502 } else if (IS_BROADWELL(dev_priv)) {
503 ddi_translations_fdi = bdw_ddi_translations_fdi;
504 ddi_translations_dp = bdw_ddi_translations_dp;
505 ddi_translations_edp = bdw_get_buf_trans_edp(dev_priv, &n_edp_entries);
506 n_dp_entries = ARRAY_SIZE(bdw_ddi_translations_dp);
507 } else if (IS_HASWELL(dev_priv)) {
508 ddi_translations_fdi = hsw_ddi_translations_fdi;
509 ddi_translations_dp = hsw_ddi_translations_dp;
510 ddi_translations_edp = hsw_ddi_translations_dp;
511 n_dp_entries = n_edp_entries = ARRAY_SIZE(hsw_ddi_translations_dp);
512 } else {
513 WARN(1, "ddi translation table missing\n");
514 ddi_translations_edp = bdw_ddi_translations_dp;
515 ddi_translations_fdi = bdw_ddi_translations_fdi;
516 ddi_translations_dp = bdw_ddi_translations_dp;
517 n_edp_entries = ARRAY_SIZE(bdw_ddi_translations_edp);
518 n_dp_entries = ARRAY_SIZE(bdw_ddi_translations_dp);
519 }
520
521 if (IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv)) {
522 /* If we're boosting the current, set bit 31 of trans1 */
523 if (dev_priv->vbt.ddi_port_info[port].dp_boost_level)
524 iboost_bit = DDI_BUF_BALANCE_LEG_ENABLE;
525
526 if (WARN_ON(encoder->type == INTEL_OUTPUT_EDP &&
527 port != PORT_A && port != PORT_E &&
528 n_edp_entries > 9))
529 n_edp_entries = 9;
530 }
531
532 switch (encoder->type) {
533 case INTEL_OUTPUT_EDP:
534 ddi_translations = ddi_translations_edp;
535 size = n_edp_entries;
536 break;
537 case INTEL_OUTPUT_DP:
538 ddi_translations = ddi_translations_dp;
539 size = n_dp_entries;
540 break;
541 case INTEL_OUTPUT_ANALOG:
542 ddi_translations = ddi_translations_fdi;
543 size = n_dp_entries;
544 break;
545 default:
546 BUG();
547 }
548
549 for (i = 0; i < size; i++) {
550 I915_WRITE(DDI_BUF_TRANS_LO(port, i),
551 ddi_translations[i].trans1 | iboost_bit);
552 I915_WRITE(DDI_BUF_TRANS_HI(port, i),
553 ddi_translations[i].trans2);
554 }
555}
556
557/*
558 * Starting with Haswell, DDI port buffers must be programmed with correct
559 * values in advance. This function programs the correct values for
560 * HDMI/DVI use cases.
561 */
562static void intel_prepare_hdmi_ddi_buffers(struct intel_encoder *encoder)
563{
564 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
565 u32 iboost_bit = 0;
566 int n_hdmi_entries, hdmi_level;
567 enum port port = intel_ddi_get_encoder_port(encoder);
568 const struct ddi_buf_trans *ddi_translations_hdmi;
569
570 if (IS_BROXTON(dev_priv))
571 return;
572
573 hdmi_level = intel_ddi_hdmi_level(dev_priv, port);
574
575 if (IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv)) {
576 ddi_translations_hdmi = skl_get_buf_trans_hdmi(dev_priv, &n_hdmi_entries);
577
578 /* If we're boosting the current, set bit 31 of trans1 */
579 if (dev_priv->vbt.ddi_port_info[port].hdmi_boost_level)
580 iboost_bit = DDI_BUF_BALANCE_LEG_ENABLE;
581 } else if (IS_BROADWELL(dev_priv)) {
582 ddi_translations_hdmi = bdw_ddi_translations_hdmi;
583 n_hdmi_entries = ARRAY_SIZE(bdw_ddi_translations_hdmi);
584 } else if (IS_HASWELL(dev_priv)) {
585 ddi_translations_hdmi = hsw_ddi_translations_hdmi;
586 n_hdmi_entries = ARRAY_SIZE(hsw_ddi_translations_hdmi);
587 } else {
588 WARN(1, "ddi translation table missing\n");
589 ddi_translations_hdmi = bdw_ddi_translations_hdmi;
590 n_hdmi_entries = ARRAY_SIZE(bdw_ddi_translations_hdmi);
591 }
592
593 /* Entry 9 is for HDMI: */
594 I915_WRITE(DDI_BUF_TRANS_LO(port, 9),
595 ddi_translations_hdmi[hdmi_level].trans1 | iboost_bit);
596 I915_WRITE(DDI_BUF_TRANS_HI(port, 9),
597 ddi_translations_hdmi[hdmi_level].trans2);
598}
599
600static void intel_wait_ddi_buf_idle(struct drm_i915_private *dev_priv,
601 enum port port)
602{
603 i915_reg_t reg = DDI_BUF_CTL(port);
604 int i;
605
606 for (i = 0; i < 16; i++) {
607 udelay(1);
608 if (I915_READ(reg) & DDI_BUF_IS_IDLE)
609 return;
610 }
611 DRM_ERROR("Timeout waiting for DDI BUF %c idle bit\n", port_name(port));
612}
613
614static uint32_t hsw_pll_to_ddi_pll_sel(struct intel_shared_dpll *pll)
615{
616 switch (pll->id) {
617 case DPLL_ID_WRPLL1:
618 return PORT_CLK_SEL_WRPLL1;
619 case DPLL_ID_WRPLL2:
620 return PORT_CLK_SEL_WRPLL2;
621 case DPLL_ID_SPLL:
622 return PORT_CLK_SEL_SPLL;
623 case DPLL_ID_LCPLL_810:
624 return PORT_CLK_SEL_LCPLL_810;
625 case DPLL_ID_LCPLL_1350:
626 return PORT_CLK_SEL_LCPLL_1350;
627 case DPLL_ID_LCPLL_2700:
628 return PORT_CLK_SEL_LCPLL_2700;
629 default:
630 MISSING_CASE(pll->id);
631 return PORT_CLK_SEL_NONE;
632 }
633}
634
635/* Starting with Haswell, different DDI ports can work in FDI mode for
636 * connection to the PCH-located connectors. For this, it is necessary to train
637 * both the DDI port and PCH receiver for the desired DDI buffer settings.
638 *
639 * The recommended port to work in FDI mode is DDI E, which we use here. Also,
640 * please note that when FDI mode is active on DDI E, it shares 2 lines with
641 * DDI A (which is used for eDP)
642 */
643
644void hsw_fdi_link_train(struct drm_crtc *crtc)
645{
646 struct drm_device *dev = crtc->dev;
647 struct drm_i915_private *dev_priv = to_i915(dev);
648 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
649 struct intel_encoder *encoder;
650 u32 temp, i, rx_ctl_val, ddi_pll_sel;
651
652 for_each_encoder_on_crtc(dev, crtc, encoder) {
653 WARN_ON(encoder->type != INTEL_OUTPUT_ANALOG);
654 intel_prepare_dp_ddi_buffers(encoder);
655 }
656
657 /* Set the FDI_RX_MISC pwrdn lanes and the 2 workarounds listed at the
658 * mode set "sequence for CRT port" document:
659 * - TP1 to TP2 time with the default value
660 * - FDI delay to 90h
661 *
662 * WaFDIAutoLinkSetTimingOverrride:hsw
663 */
664 I915_WRITE(FDI_RX_MISC(PIPE_A), FDI_RX_PWRDN_LANE1_VAL(2) |
665 FDI_RX_PWRDN_LANE0_VAL(2) |
666 FDI_RX_TP1_TO_TP2_48 | FDI_RX_FDI_DELAY_90);
667
668 /* Enable the PCH Receiver FDI PLL */
669 rx_ctl_val = dev_priv->fdi_rx_config | FDI_RX_ENHANCE_FRAME_ENABLE |
670 FDI_RX_PLL_ENABLE |
671 FDI_DP_PORT_WIDTH(intel_crtc->config->fdi_lanes);
672 I915_WRITE(FDI_RX_CTL(PIPE_A), rx_ctl_val);
673 POSTING_READ(FDI_RX_CTL(PIPE_A));
674 udelay(220);
675
676 /* Switch from Rawclk to PCDclk */
677 rx_ctl_val |= FDI_PCDCLK;
678 I915_WRITE(FDI_RX_CTL(PIPE_A), rx_ctl_val);
679
680 /* Configure Port Clock Select */
681 ddi_pll_sel = hsw_pll_to_ddi_pll_sel(intel_crtc->config->shared_dpll);
682 I915_WRITE(PORT_CLK_SEL(PORT_E), ddi_pll_sel);
683 WARN_ON(ddi_pll_sel != PORT_CLK_SEL_SPLL);
684
685 /* Start the training iterating through available voltages and emphasis,
686 * testing each value twice. */
687 for (i = 0; i < ARRAY_SIZE(hsw_ddi_translations_fdi) * 2; i++) {
688 /* Configure DP_TP_CTL with auto-training */
689 I915_WRITE(DP_TP_CTL(PORT_E),
690 DP_TP_CTL_FDI_AUTOTRAIN |
691 DP_TP_CTL_ENHANCED_FRAME_ENABLE |
692 DP_TP_CTL_LINK_TRAIN_PAT1 |
693 DP_TP_CTL_ENABLE);
694
695 /* Configure and enable DDI_BUF_CTL for DDI E with next voltage.
696 * DDI E does not support port reversal, the functionality is
697 * achieved on the PCH side in FDI_RX_CTL, so no need to set the
698 * port reversal bit */
699 I915_WRITE(DDI_BUF_CTL(PORT_E),
700 DDI_BUF_CTL_ENABLE |
701 ((intel_crtc->config->fdi_lanes - 1) << 1) |
702 DDI_BUF_TRANS_SELECT(i / 2));
703 POSTING_READ(DDI_BUF_CTL(PORT_E));
704
705 udelay(600);
706
707 /* Program PCH FDI Receiver TU */
708 I915_WRITE(FDI_RX_TUSIZE1(PIPE_A), TU_SIZE(64));
709
710 /* Enable PCH FDI Receiver with auto-training */
711 rx_ctl_val |= FDI_RX_ENABLE | FDI_LINK_TRAIN_AUTO;
712 I915_WRITE(FDI_RX_CTL(PIPE_A), rx_ctl_val);
713 POSTING_READ(FDI_RX_CTL(PIPE_A));
714
715 /* Wait for FDI receiver lane calibration */
716 udelay(30);
717
718 /* Unset FDI_RX_MISC pwrdn lanes */
719 temp = I915_READ(FDI_RX_MISC(PIPE_A));
720 temp &= ~(FDI_RX_PWRDN_LANE1_MASK | FDI_RX_PWRDN_LANE0_MASK);
721 I915_WRITE(FDI_RX_MISC(PIPE_A), temp);
722 POSTING_READ(FDI_RX_MISC(PIPE_A));
723
724 /* Wait for FDI auto training time */
725 udelay(5);
726
727 temp = I915_READ(DP_TP_STATUS(PORT_E));
728 if (temp & DP_TP_STATUS_AUTOTRAIN_DONE) {
729 DRM_DEBUG_KMS("FDI link training done on step %d\n", i);
730 break;
731 }
732
733 /*
734 * Leave things enabled even if we failed to train FDI.
735 * Results in less fireworks from the state checker.
736 */
737 if (i == ARRAY_SIZE(hsw_ddi_translations_fdi) * 2 - 1) {
738 DRM_ERROR("FDI link training failed!\n");
739 break;
740 }
741
742 rx_ctl_val &= ~FDI_RX_ENABLE;
743 I915_WRITE(FDI_RX_CTL(PIPE_A), rx_ctl_val);
744 POSTING_READ(FDI_RX_CTL(PIPE_A));
745
746 temp = I915_READ(DDI_BUF_CTL(PORT_E));
747 temp &= ~DDI_BUF_CTL_ENABLE;
748 I915_WRITE(DDI_BUF_CTL(PORT_E), temp);
749 POSTING_READ(DDI_BUF_CTL(PORT_E));
750
751 /* Disable DP_TP_CTL and FDI_RX_CTL and retry */
752 temp = I915_READ(DP_TP_CTL(PORT_E));
753 temp &= ~(DP_TP_CTL_ENABLE | DP_TP_CTL_LINK_TRAIN_MASK);
754 temp |= DP_TP_CTL_LINK_TRAIN_PAT1;
755 I915_WRITE(DP_TP_CTL(PORT_E), temp);
756 POSTING_READ(DP_TP_CTL(PORT_E));
757
758 intel_wait_ddi_buf_idle(dev_priv, PORT_E);
759
760 /* Reset FDI_RX_MISC pwrdn lanes */
761 temp = I915_READ(FDI_RX_MISC(PIPE_A));
762 temp &= ~(FDI_RX_PWRDN_LANE1_MASK | FDI_RX_PWRDN_LANE0_MASK);
763 temp |= FDI_RX_PWRDN_LANE1_VAL(2) | FDI_RX_PWRDN_LANE0_VAL(2);
764 I915_WRITE(FDI_RX_MISC(PIPE_A), temp);
765 POSTING_READ(FDI_RX_MISC(PIPE_A));
766 }
767
768 /* Enable normal pixel sending for FDI */
769 I915_WRITE(DP_TP_CTL(PORT_E),
770 DP_TP_CTL_FDI_AUTOTRAIN |
771 DP_TP_CTL_LINK_TRAIN_NORMAL |
772 DP_TP_CTL_ENHANCED_FRAME_ENABLE |
773 DP_TP_CTL_ENABLE);
774}
775
776void intel_ddi_init_dp_buf_reg(struct intel_encoder *encoder)
777{
778 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
779 struct intel_digital_port *intel_dig_port =
780 enc_to_dig_port(&encoder->base);
781
782 intel_dp->DP = intel_dig_port->saved_port_bits |
783 DDI_BUF_CTL_ENABLE | DDI_BUF_TRANS_SELECT(0);
784 intel_dp->DP |= DDI_PORT_WIDTH(intel_dp->lane_count);
785}
786
787static struct intel_encoder *
788intel_ddi_get_crtc_encoder(struct drm_crtc *crtc)
789{
790 struct drm_device *dev = crtc->dev;
791 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
792 struct intel_encoder *intel_encoder, *ret = NULL;
793 int num_encoders = 0;
794
795 for_each_encoder_on_crtc(dev, crtc, intel_encoder) {
796 ret = intel_encoder;
797 num_encoders++;
798 }
799
800 if (num_encoders != 1)
801 WARN(1, "%d encoders on crtc for pipe %c\n", num_encoders,
802 pipe_name(intel_crtc->pipe));
803
804 BUG_ON(ret == NULL);
805 return ret;
806}
807
808struct intel_encoder *
809intel_ddi_get_crtc_new_encoder(struct intel_crtc_state *crtc_state)
810{
811 struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
812 struct intel_encoder *ret = NULL;
813 struct drm_atomic_state *state;
814 struct drm_connector *connector;
815 struct drm_connector_state *connector_state;
816 int num_encoders = 0;
817 int i;
818
819 state = crtc_state->base.state;
820
821 for_each_connector_in_state(state, connector, connector_state, i) {
822 if (connector_state->crtc != crtc_state->base.crtc)
823 continue;
824
825 ret = to_intel_encoder(connector_state->best_encoder);
826 num_encoders++;
827 }
828
829 WARN(num_encoders != 1, "%d encoders on crtc for pipe %c\n", num_encoders,
830 pipe_name(crtc->pipe));
831
832 BUG_ON(ret == NULL);
833 return ret;
834}
835
836#define LC_FREQ 2700
837
838static int hsw_ddi_calc_wrpll_link(struct drm_i915_private *dev_priv,
839 i915_reg_t reg)
840{
841 int refclk = LC_FREQ;
842 int n, p, r;
843 u32 wrpll;
844
845 wrpll = I915_READ(reg);
846 switch (wrpll & WRPLL_PLL_REF_MASK) {
847 case WRPLL_PLL_SSC:
848 case WRPLL_PLL_NON_SSC:
849 /*
850 * We could calculate spread here, but our checking
851 * code only cares about 5% accuracy, and spread is a max of
852 * 0.5% downspread.
853 */
854 refclk = 135;
855 break;
856 case WRPLL_PLL_LCPLL:
857 refclk = LC_FREQ;
858 break;
859 default:
860 WARN(1, "bad wrpll refclk\n");
861 return 0;
862 }
863
864 r = wrpll & WRPLL_DIVIDER_REF_MASK;
865 p = (wrpll & WRPLL_DIVIDER_POST_MASK) >> WRPLL_DIVIDER_POST_SHIFT;
866 n = (wrpll & WRPLL_DIVIDER_FB_MASK) >> WRPLL_DIVIDER_FB_SHIFT;
867
868 /* Convert to KHz, p & r have a fixed point portion */
869 return (refclk * n * 100) / (p * r);
870}
871
872static int skl_calc_wrpll_link(struct drm_i915_private *dev_priv,
873 uint32_t dpll)
874{
875 i915_reg_t cfgcr1_reg, cfgcr2_reg;
876 uint32_t cfgcr1_val, cfgcr2_val;
877 uint32_t p0, p1, p2, dco_freq;
878
879 cfgcr1_reg = DPLL_CFGCR1(dpll);
880 cfgcr2_reg = DPLL_CFGCR2(dpll);
881
882 cfgcr1_val = I915_READ(cfgcr1_reg);
883 cfgcr2_val = I915_READ(cfgcr2_reg);
884
885 p0 = cfgcr2_val & DPLL_CFGCR2_PDIV_MASK;
886 p2 = cfgcr2_val & DPLL_CFGCR2_KDIV_MASK;
887
888 if (cfgcr2_val & DPLL_CFGCR2_QDIV_MODE(1))
889 p1 = (cfgcr2_val & DPLL_CFGCR2_QDIV_RATIO_MASK) >> 8;
890 else
891 p1 = 1;
892
893
894 switch (p0) {
895 case DPLL_CFGCR2_PDIV_1:
896 p0 = 1;
897 break;
898 case DPLL_CFGCR2_PDIV_2:
899 p0 = 2;
900 break;
901 case DPLL_CFGCR2_PDIV_3:
902 p0 = 3;
903 break;
904 case DPLL_CFGCR2_PDIV_7:
905 p0 = 7;
906 break;
907 }
908
909 switch (p2) {
910 case DPLL_CFGCR2_KDIV_5:
911 p2 = 5;
912 break;
913 case DPLL_CFGCR2_KDIV_2:
914 p2 = 2;
915 break;
916 case DPLL_CFGCR2_KDIV_3:
917 p2 = 3;
918 break;
919 case DPLL_CFGCR2_KDIV_1:
920 p2 = 1;
921 break;
922 }
923
924 dco_freq = (cfgcr1_val & DPLL_CFGCR1_DCO_INTEGER_MASK) * 24 * 1000;
925
926 dco_freq += (((cfgcr1_val & DPLL_CFGCR1_DCO_FRACTION_MASK) >> 9) * 24 *
927 1000) / 0x8000;
928
929 return dco_freq / (p0 * p1 * p2 * 5);
930}
931
932static void ddi_dotclock_get(struct intel_crtc_state *pipe_config)
933{
934 int dotclock;
935
936 if (pipe_config->has_pch_encoder)
937 dotclock = intel_dotclock_calculate(pipe_config->port_clock,
938 &pipe_config->fdi_m_n);
939 else if (intel_crtc_has_dp_encoder(pipe_config))
940 dotclock = intel_dotclock_calculate(pipe_config->port_clock,
941 &pipe_config->dp_m_n);
942 else if (pipe_config->has_hdmi_sink && pipe_config->pipe_bpp == 36)
943 dotclock = pipe_config->port_clock * 2 / 3;
944 else
945 dotclock = pipe_config->port_clock;
946
947 if (pipe_config->pixel_multiplier)
948 dotclock /= pipe_config->pixel_multiplier;
949
950 pipe_config->base.adjusted_mode.crtc_clock = dotclock;
951}
952
953static void skl_ddi_clock_get(struct intel_encoder *encoder,
954 struct intel_crtc_state *pipe_config)
955{
956 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
957 int link_clock = 0;
958 uint32_t dpll_ctl1, dpll;
959
960 dpll = intel_get_shared_dpll_id(dev_priv, pipe_config->shared_dpll);
961
962 dpll_ctl1 = I915_READ(DPLL_CTRL1);
963
964 if (dpll_ctl1 & DPLL_CTRL1_HDMI_MODE(dpll)) {
965 link_clock = skl_calc_wrpll_link(dev_priv, dpll);
966 } else {
967 link_clock = dpll_ctl1 & DPLL_CTRL1_LINK_RATE_MASK(dpll);
968 link_clock >>= DPLL_CTRL1_LINK_RATE_SHIFT(dpll);
969
970 switch (link_clock) {
971 case DPLL_CTRL1_LINK_RATE_810:
972 link_clock = 81000;
973 break;
974 case DPLL_CTRL1_LINK_RATE_1080:
975 link_clock = 108000;
976 break;
977 case DPLL_CTRL1_LINK_RATE_1350:
978 link_clock = 135000;
979 break;
980 case DPLL_CTRL1_LINK_RATE_1620:
981 link_clock = 162000;
982 break;
983 case DPLL_CTRL1_LINK_RATE_2160:
984 link_clock = 216000;
985 break;
986 case DPLL_CTRL1_LINK_RATE_2700:
987 link_clock = 270000;
988 break;
989 default:
990 WARN(1, "Unsupported link rate\n");
991 break;
992 }
993 link_clock *= 2;
994 }
995
996 pipe_config->port_clock = link_clock;
997
998 ddi_dotclock_get(pipe_config);
999}
1000
1001static void hsw_ddi_clock_get(struct intel_encoder *encoder,
1002 struct intel_crtc_state *pipe_config)
1003{
1004 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
1005 int link_clock = 0;
1006 u32 val, pll;
1007
1008 val = hsw_pll_to_ddi_pll_sel(pipe_config->shared_dpll);
1009 switch (val & PORT_CLK_SEL_MASK) {
1010 case PORT_CLK_SEL_LCPLL_810:
1011 link_clock = 81000;
1012 break;
1013 case PORT_CLK_SEL_LCPLL_1350:
1014 link_clock = 135000;
1015 break;
1016 case PORT_CLK_SEL_LCPLL_2700:
1017 link_clock = 270000;
1018 break;
1019 case PORT_CLK_SEL_WRPLL1:
1020 link_clock = hsw_ddi_calc_wrpll_link(dev_priv, WRPLL_CTL(0));
1021 break;
1022 case PORT_CLK_SEL_WRPLL2:
1023 link_clock = hsw_ddi_calc_wrpll_link(dev_priv, WRPLL_CTL(1));
1024 break;
1025 case PORT_CLK_SEL_SPLL:
1026 pll = I915_READ(SPLL_CTL) & SPLL_PLL_FREQ_MASK;
1027 if (pll == SPLL_PLL_FREQ_810MHz)
1028 link_clock = 81000;
1029 else if (pll == SPLL_PLL_FREQ_1350MHz)
1030 link_clock = 135000;
1031 else if (pll == SPLL_PLL_FREQ_2700MHz)
1032 link_clock = 270000;
1033 else {
1034 WARN(1, "bad spll freq\n");
1035 return;
1036 }
1037 break;
1038 default:
1039 WARN(1, "bad port clock sel\n");
1040 return;
1041 }
1042
1043 pipe_config->port_clock = link_clock * 2;
1044
1045 ddi_dotclock_get(pipe_config);
1046}
1047
1048static int bxt_calc_pll_link(struct drm_i915_private *dev_priv,
1049 enum intel_dpll_id dpll)
1050{
1051 struct intel_shared_dpll *pll;
1052 struct intel_dpll_hw_state *state;
1053 struct dpll clock;
1054
1055 /* For DDI ports we always use a shared PLL. */
1056 if (WARN_ON(dpll == DPLL_ID_PRIVATE))
1057 return 0;
1058
1059 pll = &dev_priv->shared_dplls[dpll];
1060 state = &pll->config.hw_state;
1061
1062 clock.m1 = 2;
1063 clock.m2 = (state->pll0 & PORT_PLL_M2_MASK) << 22;
1064 if (state->pll3 & PORT_PLL_M2_FRAC_ENABLE)
1065 clock.m2 |= state->pll2 & PORT_PLL_M2_FRAC_MASK;
1066 clock.n = (state->pll1 & PORT_PLL_N_MASK) >> PORT_PLL_N_SHIFT;
1067 clock.p1 = (state->ebb0 & PORT_PLL_P1_MASK) >> PORT_PLL_P1_SHIFT;
1068 clock.p2 = (state->ebb0 & PORT_PLL_P2_MASK) >> PORT_PLL_P2_SHIFT;
1069
1070 return chv_calc_dpll_params(100000, &clock);
1071}
1072
1073static void bxt_ddi_clock_get(struct intel_encoder *encoder,
1074 struct intel_crtc_state *pipe_config)
1075{
1076 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
1077 enum port port = intel_ddi_get_encoder_port(encoder);
1078 uint32_t dpll = port;
1079
1080 pipe_config->port_clock = bxt_calc_pll_link(dev_priv, dpll);
1081
1082 ddi_dotclock_get(pipe_config);
1083}
1084
1085void intel_ddi_clock_get(struct intel_encoder *encoder,
1086 struct intel_crtc_state *pipe_config)
1087{
1088 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
1089
1090 if (INTEL_GEN(dev_priv) <= 8)
1091 hsw_ddi_clock_get(encoder, pipe_config);
1092 else if (IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv))
1093 skl_ddi_clock_get(encoder, pipe_config);
1094 else if (IS_BROXTON(dev_priv))
1095 bxt_ddi_clock_get(encoder, pipe_config);
1096}
1097
1098static bool
1099hsw_ddi_pll_select(struct intel_crtc *intel_crtc,
1100 struct intel_crtc_state *crtc_state,
1101 struct intel_encoder *intel_encoder)
1102{
1103 struct intel_shared_dpll *pll;
1104
1105 pll = intel_get_shared_dpll(intel_crtc, crtc_state,
1106 intel_encoder);
1107 if (!pll)
1108 DRM_DEBUG_DRIVER("failed to find PLL for pipe %c\n",
1109 pipe_name(intel_crtc->pipe));
1110
1111 return pll;
1112}
1113
1114static bool
1115skl_ddi_pll_select(struct intel_crtc *intel_crtc,
1116 struct intel_crtc_state *crtc_state,
1117 struct intel_encoder *intel_encoder)
1118{
1119 struct intel_shared_dpll *pll;
1120
1121 pll = intel_get_shared_dpll(intel_crtc, crtc_state, intel_encoder);
1122 if (pll == NULL) {
1123 DRM_DEBUG_DRIVER("failed to find PLL for pipe %c\n",
1124 pipe_name(intel_crtc->pipe));
1125 return false;
1126 }
1127
1128 return true;
1129}
1130
1131static bool
1132bxt_ddi_pll_select(struct intel_crtc *intel_crtc,
1133 struct intel_crtc_state *crtc_state,
1134 struct intel_encoder *intel_encoder)
1135{
1136 return !!intel_get_shared_dpll(intel_crtc, crtc_state, intel_encoder);
1137}
1138
1139/*
1140 * Tries to find a *shared* PLL for the CRTC and store it in
1141 * intel_crtc->ddi_pll_sel.
1142 *
1143 * For private DPLLs, compute_config() should do the selection for us. This
1144 * function should be folded into compute_config() eventually.
1145 */
1146bool intel_ddi_pll_select(struct intel_crtc *intel_crtc,
1147 struct intel_crtc_state *crtc_state)
1148{
1149 struct drm_i915_private *dev_priv = to_i915(intel_crtc->base.dev);
1150 struct intel_encoder *intel_encoder =
1151 intel_ddi_get_crtc_new_encoder(crtc_state);
1152
1153 if (IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv))
1154 return skl_ddi_pll_select(intel_crtc, crtc_state,
1155 intel_encoder);
1156 else if (IS_BROXTON(dev_priv))
1157 return bxt_ddi_pll_select(intel_crtc, crtc_state,
1158 intel_encoder);
1159 else
1160 return hsw_ddi_pll_select(intel_crtc, crtc_state,
1161 intel_encoder);
1162}
1163
1164void intel_ddi_set_pipe_settings(struct drm_crtc *crtc)
1165{
1166 struct drm_i915_private *dev_priv = to_i915(crtc->dev);
1167 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
1168 struct intel_encoder *intel_encoder = intel_ddi_get_crtc_encoder(crtc);
1169 enum transcoder cpu_transcoder = intel_crtc->config->cpu_transcoder;
1170 int type = intel_encoder->type;
1171 uint32_t temp;
1172
1173 if (type == INTEL_OUTPUT_DP || type == INTEL_OUTPUT_EDP || type == INTEL_OUTPUT_DP_MST) {
1174 WARN_ON(transcoder_is_dsi(cpu_transcoder));
1175
1176 temp = TRANS_MSA_SYNC_CLK;
1177 switch (intel_crtc->config->pipe_bpp) {
1178 case 18:
1179 temp |= TRANS_MSA_6_BPC;
1180 break;
1181 case 24:
1182 temp |= TRANS_MSA_8_BPC;
1183 break;
1184 case 30:
1185 temp |= TRANS_MSA_10_BPC;
1186 break;
1187 case 36:
1188 temp |= TRANS_MSA_12_BPC;
1189 break;
1190 default:
1191 BUG();
1192 }
1193 I915_WRITE(TRANS_MSA_MISC(cpu_transcoder), temp);
1194 }
1195}
1196
1197void intel_ddi_set_vc_payload_alloc(struct drm_crtc *crtc, bool state)
1198{
1199 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
1200 struct drm_device *dev = crtc->dev;
1201 struct drm_i915_private *dev_priv = to_i915(dev);
1202 enum transcoder cpu_transcoder = intel_crtc->config->cpu_transcoder;
1203 uint32_t temp;
1204 temp = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder));
1205 if (state == true)
1206 temp |= TRANS_DDI_DP_VC_PAYLOAD_ALLOC;
1207 else
1208 temp &= ~TRANS_DDI_DP_VC_PAYLOAD_ALLOC;
1209 I915_WRITE(TRANS_DDI_FUNC_CTL(cpu_transcoder), temp);
1210}
1211
1212void intel_ddi_enable_transcoder_func(struct drm_crtc *crtc)
1213{
1214 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
1215 struct intel_encoder *intel_encoder = intel_ddi_get_crtc_encoder(crtc);
1216 struct drm_device *dev = crtc->dev;
1217 struct drm_i915_private *dev_priv = to_i915(dev);
1218 enum pipe pipe = intel_crtc->pipe;
1219 enum transcoder cpu_transcoder = intel_crtc->config->cpu_transcoder;
1220 enum port port = intel_ddi_get_encoder_port(intel_encoder);
1221 int type = intel_encoder->type;
1222 uint32_t temp;
1223
1224 /* Enable TRANS_DDI_FUNC_CTL for the pipe to work in HDMI mode */
1225 temp = TRANS_DDI_FUNC_ENABLE;
1226 temp |= TRANS_DDI_SELECT_PORT(port);
1227
1228 switch (intel_crtc->config->pipe_bpp) {
1229 case 18:
1230 temp |= TRANS_DDI_BPC_6;
1231 break;
1232 case 24:
1233 temp |= TRANS_DDI_BPC_8;
1234 break;
1235 case 30:
1236 temp |= TRANS_DDI_BPC_10;
1237 break;
1238 case 36:
1239 temp |= TRANS_DDI_BPC_12;
1240 break;
1241 default:
1242 BUG();
1243 }
1244
1245 if (intel_crtc->config->base.adjusted_mode.flags & DRM_MODE_FLAG_PVSYNC)
1246 temp |= TRANS_DDI_PVSYNC;
1247 if (intel_crtc->config->base.adjusted_mode.flags & DRM_MODE_FLAG_PHSYNC)
1248 temp |= TRANS_DDI_PHSYNC;
1249
1250 if (cpu_transcoder == TRANSCODER_EDP) {
1251 switch (pipe) {
1252 case PIPE_A:
1253 /* On Haswell, can only use the always-on power well for
1254 * eDP when not using the panel fitter, and when not
1255 * using motion blur mitigation (which we don't
1256 * support). */
1257 if (IS_HASWELL(dev_priv) &&
1258 (intel_crtc->config->pch_pfit.enabled ||
1259 intel_crtc->config->pch_pfit.force_thru))
1260 temp |= TRANS_DDI_EDP_INPUT_A_ONOFF;
1261 else
1262 temp |= TRANS_DDI_EDP_INPUT_A_ON;
1263 break;
1264 case PIPE_B:
1265 temp |= TRANS_DDI_EDP_INPUT_B_ONOFF;
1266 break;
1267 case PIPE_C:
1268 temp |= TRANS_DDI_EDP_INPUT_C_ONOFF;
1269 break;
1270 default:
1271 BUG();
1272 break;
1273 }
1274 }
1275
1276 if (type == INTEL_OUTPUT_HDMI) {
1277 if (intel_crtc->config->has_hdmi_sink)
1278 temp |= TRANS_DDI_MODE_SELECT_HDMI;
1279 else
1280 temp |= TRANS_DDI_MODE_SELECT_DVI;
1281 } else if (type == INTEL_OUTPUT_ANALOG) {
1282 temp |= TRANS_DDI_MODE_SELECT_FDI;
1283 temp |= (intel_crtc->config->fdi_lanes - 1) << 1;
1284 } else if (type == INTEL_OUTPUT_DP ||
1285 type == INTEL_OUTPUT_EDP) {
1286 temp |= TRANS_DDI_MODE_SELECT_DP_SST;
1287 temp |= DDI_PORT_WIDTH(intel_crtc->config->lane_count);
1288 } else if (type == INTEL_OUTPUT_DP_MST) {
1289 temp |= TRANS_DDI_MODE_SELECT_DP_MST;
1290 temp |= DDI_PORT_WIDTH(intel_crtc->config->lane_count);
1291 } else {
1292 WARN(1, "Invalid encoder type %d for pipe %c\n",
1293 intel_encoder->type, pipe_name(pipe));
1294 }
1295
1296 I915_WRITE(TRANS_DDI_FUNC_CTL(cpu_transcoder), temp);
1297}
1298
1299void intel_ddi_disable_transcoder_func(struct drm_i915_private *dev_priv,
1300 enum transcoder cpu_transcoder)
1301{
1302 i915_reg_t reg = TRANS_DDI_FUNC_CTL(cpu_transcoder);
1303 uint32_t val = I915_READ(reg);
1304
1305 val &= ~(TRANS_DDI_FUNC_ENABLE | TRANS_DDI_PORT_MASK | TRANS_DDI_DP_VC_PAYLOAD_ALLOC);
1306 val |= TRANS_DDI_PORT_NONE;
1307 I915_WRITE(reg, val);
1308}
1309
1310bool intel_ddi_connector_get_hw_state(struct intel_connector *intel_connector)
1311{
1312 struct drm_device *dev = intel_connector->base.dev;
1313 struct drm_i915_private *dev_priv = to_i915(dev);
1314 struct intel_encoder *intel_encoder = intel_connector->encoder;
1315 int type = intel_connector->base.connector_type;
1316 enum port port = intel_ddi_get_encoder_port(intel_encoder);
1317 enum pipe pipe = 0;
1318 enum transcoder cpu_transcoder;
1319 enum intel_display_power_domain power_domain;
1320 uint32_t tmp;
1321 bool ret;
1322
1323 power_domain = intel_display_port_power_domain(intel_encoder);
1324 if (!intel_display_power_get_if_enabled(dev_priv, power_domain))
1325 return false;
1326
1327 if (!intel_encoder->get_hw_state(intel_encoder, &pipe)) {
1328 ret = false;
1329 goto out;
1330 }
1331
1332 if (port == PORT_A)
1333 cpu_transcoder = TRANSCODER_EDP;
1334 else
1335 cpu_transcoder = (enum transcoder) pipe;
1336
1337 tmp = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder));
1338
1339 switch (tmp & TRANS_DDI_MODE_SELECT_MASK) {
1340 case TRANS_DDI_MODE_SELECT_HDMI:
1341 case TRANS_DDI_MODE_SELECT_DVI:
1342 ret = type == DRM_MODE_CONNECTOR_HDMIA;
1343 break;
1344
1345 case TRANS_DDI_MODE_SELECT_DP_SST:
1346 ret = type == DRM_MODE_CONNECTOR_eDP ||
1347 type == DRM_MODE_CONNECTOR_DisplayPort;
1348 break;
1349
1350 case TRANS_DDI_MODE_SELECT_DP_MST:
1351 /* if the transcoder is in MST state then
1352 * connector isn't connected */
1353 ret = false;
1354 break;
1355
1356 case TRANS_DDI_MODE_SELECT_FDI:
1357 ret = type == DRM_MODE_CONNECTOR_VGA;
1358 break;
1359
1360 default:
1361 ret = false;
1362 break;
1363 }
1364
1365out:
1366 intel_display_power_put(dev_priv, power_domain);
1367
1368 return ret;
1369}
1370
1371bool intel_ddi_get_hw_state(struct intel_encoder *encoder,
1372 enum pipe *pipe)
1373{
1374 struct drm_device *dev = encoder->base.dev;
1375 struct drm_i915_private *dev_priv = to_i915(dev);
1376 enum port port = intel_ddi_get_encoder_port(encoder);
1377 enum intel_display_power_domain power_domain;
1378 u32 tmp;
1379 int i;
1380 bool ret;
1381
1382 power_domain = intel_display_port_power_domain(encoder);
1383 if (!intel_display_power_get_if_enabled(dev_priv, power_domain))
1384 return false;
1385
1386 ret = false;
1387
1388 tmp = I915_READ(DDI_BUF_CTL(port));
1389
1390 if (!(tmp & DDI_BUF_CTL_ENABLE))
1391 goto out;
1392
1393 if (port == PORT_A) {
1394 tmp = I915_READ(TRANS_DDI_FUNC_CTL(TRANSCODER_EDP));
1395
1396 switch (tmp & TRANS_DDI_EDP_INPUT_MASK) {
1397 case TRANS_DDI_EDP_INPUT_A_ON:
1398 case TRANS_DDI_EDP_INPUT_A_ONOFF:
1399 *pipe = PIPE_A;
1400 break;
1401 case TRANS_DDI_EDP_INPUT_B_ONOFF:
1402 *pipe = PIPE_B;
1403 break;
1404 case TRANS_DDI_EDP_INPUT_C_ONOFF:
1405 *pipe = PIPE_C;
1406 break;
1407 }
1408
1409 ret = true;
1410
1411 goto out;
1412 }
1413
1414 for (i = TRANSCODER_A; i <= TRANSCODER_C; i++) {
1415 tmp = I915_READ(TRANS_DDI_FUNC_CTL(i));
1416
1417 if ((tmp & TRANS_DDI_PORT_MASK) == TRANS_DDI_SELECT_PORT(port)) {
1418 if ((tmp & TRANS_DDI_MODE_SELECT_MASK) ==
1419 TRANS_DDI_MODE_SELECT_DP_MST)
1420 goto out;
1421
1422 *pipe = i;
1423 ret = true;
1424
1425 goto out;
1426 }
1427 }
1428
1429 DRM_DEBUG_KMS("No pipe for ddi port %c found\n", port_name(port));
1430
1431out:
1432 if (ret && IS_BROXTON(dev_priv)) {
1433 tmp = I915_READ(BXT_PHY_CTL(port));
1434 if ((tmp & (BXT_PHY_LANE_POWERDOWN_ACK |
1435 BXT_PHY_LANE_ENABLED)) != BXT_PHY_LANE_ENABLED)
1436 DRM_ERROR("Port %c enabled but PHY powered down? "
1437 "(PHY_CTL %08x)\n", port_name(port), tmp);
1438 }
1439
1440 intel_display_power_put(dev_priv, power_domain);
1441
1442 return ret;
1443}
1444
1445void intel_ddi_enable_pipe_clock(struct intel_crtc *intel_crtc)
1446{
1447 struct drm_crtc *crtc = &intel_crtc->base;
1448 struct drm_device *dev = crtc->dev;
1449 struct drm_i915_private *dev_priv = to_i915(dev);
1450 struct intel_encoder *intel_encoder = intel_ddi_get_crtc_encoder(crtc);
1451 enum port port = intel_ddi_get_encoder_port(intel_encoder);
1452 enum transcoder cpu_transcoder = intel_crtc->config->cpu_transcoder;
1453
1454 if (cpu_transcoder != TRANSCODER_EDP)
1455 I915_WRITE(TRANS_CLK_SEL(cpu_transcoder),
1456 TRANS_CLK_SEL_PORT(port));
1457}
1458
1459void intel_ddi_disable_pipe_clock(struct intel_crtc *intel_crtc)
1460{
1461 struct drm_i915_private *dev_priv = to_i915(intel_crtc->base.dev);
1462 enum transcoder cpu_transcoder = intel_crtc->config->cpu_transcoder;
1463
1464 if (cpu_transcoder != TRANSCODER_EDP)
1465 I915_WRITE(TRANS_CLK_SEL(cpu_transcoder),
1466 TRANS_CLK_SEL_DISABLED);
1467}
1468
1469static void _skl_ddi_set_iboost(struct drm_i915_private *dev_priv,
1470 enum port port, uint8_t iboost)
1471{
1472 u32 tmp;
1473
1474 tmp = I915_READ(DISPIO_CR_TX_BMU_CR0);
1475 tmp &= ~(BALANCE_LEG_MASK(port) | BALANCE_LEG_DISABLE(port));
1476 if (iboost)
1477 tmp |= iboost << BALANCE_LEG_SHIFT(port);
1478 else
1479 tmp |= BALANCE_LEG_DISABLE(port);
1480 I915_WRITE(DISPIO_CR_TX_BMU_CR0, tmp);
1481}
1482
1483static void skl_ddi_set_iboost(struct intel_encoder *encoder, u32 level)
1484{
1485 struct intel_digital_port *intel_dig_port = enc_to_dig_port(&encoder->base);
1486 struct drm_i915_private *dev_priv = to_i915(intel_dig_port->base.base.dev);
1487 enum port port = intel_dig_port->port;
1488 int type = encoder->type;
1489 const struct ddi_buf_trans *ddi_translations;
1490 uint8_t iboost;
1491 uint8_t dp_iboost, hdmi_iboost;
1492 int n_entries;
1493
1494 /* VBT may override standard boost values */
1495 dp_iboost = dev_priv->vbt.ddi_port_info[port].dp_boost_level;
1496 hdmi_iboost = dev_priv->vbt.ddi_port_info[port].hdmi_boost_level;
1497
1498 if (type == INTEL_OUTPUT_DP) {
1499 if (dp_iboost) {
1500 iboost = dp_iboost;
1501 } else {
1502 if (IS_KABYLAKE(dev_priv))
1503 ddi_translations = kbl_get_buf_trans_dp(dev_priv,
1504 &n_entries);
1505 else
1506 ddi_translations = skl_get_buf_trans_dp(dev_priv,
1507 &n_entries);
1508 iboost = ddi_translations[level].i_boost;
1509 }
1510 } else if (type == INTEL_OUTPUT_EDP) {
1511 if (dp_iboost) {
1512 iboost = dp_iboost;
1513 } else {
1514 ddi_translations = skl_get_buf_trans_edp(dev_priv, &n_entries);
1515
1516 if (WARN_ON(port != PORT_A &&
1517 port != PORT_E && n_entries > 9))
1518 n_entries = 9;
1519
1520 iboost = ddi_translations[level].i_boost;
1521 }
1522 } else if (type == INTEL_OUTPUT_HDMI) {
1523 if (hdmi_iboost) {
1524 iboost = hdmi_iboost;
1525 } else {
1526 ddi_translations = skl_get_buf_trans_hdmi(dev_priv, &n_entries);
1527 iboost = ddi_translations[level].i_boost;
1528 }
1529 } else {
1530 return;
1531 }
1532
1533 /* Make sure that the requested I_boost is valid */
1534 if (iboost && iboost != 0x1 && iboost != 0x3 && iboost != 0x7) {
1535 DRM_ERROR("Invalid I_boost value %u\n", iboost);
1536 return;
1537 }
1538
1539 _skl_ddi_set_iboost(dev_priv, port, iboost);
1540
1541 if (port == PORT_A && intel_dig_port->max_lanes == 4)
1542 _skl_ddi_set_iboost(dev_priv, PORT_E, iboost);
1543}
1544
1545static void bxt_ddi_vswing_sequence(struct drm_i915_private *dev_priv,
1546 u32 level, enum port port, int type)
1547{
1548 const struct bxt_ddi_buf_trans *ddi_translations;
1549 u32 n_entries, i;
1550
1551 if (type == INTEL_OUTPUT_EDP && dev_priv->vbt.edp.low_vswing) {
1552 n_entries = ARRAY_SIZE(bxt_ddi_translations_edp);
1553 ddi_translations = bxt_ddi_translations_edp;
1554 } else if (type == INTEL_OUTPUT_DP
1555 || type == INTEL_OUTPUT_EDP) {
1556 n_entries = ARRAY_SIZE(bxt_ddi_translations_dp);
1557 ddi_translations = bxt_ddi_translations_dp;
1558 } else if (type == INTEL_OUTPUT_HDMI) {
1559 n_entries = ARRAY_SIZE(bxt_ddi_translations_hdmi);
1560 ddi_translations = bxt_ddi_translations_hdmi;
1561 } else {
1562 DRM_DEBUG_KMS("Vswing programming not done for encoder %d\n",
1563 type);
1564 return;
1565 }
1566
1567 /* Check if default value has to be used */
1568 if (level >= n_entries ||
1569 (type == INTEL_OUTPUT_HDMI && level == HDMI_LEVEL_SHIFT_UNKNOWN)) {
1570 for (i = 0; i < n_entries; i++) {
1571 if (ddi_translations[i].default_index) {
1572 level = i;
1573 break;
1574 }
1575 }
1576 }
1577
1578 bxt_ddi_phy_set_signal_level(dev_priv, port,
1579 ddi_translations[level].margin,
1580 ddi_translations[level].scale,
1581 ddi_translations[level].enable,
1582 ddi_translations[level].deemphasis);
1583}
1584
1585static uint32_t translate_signal_level(int signal_levels)
1586{
1587 uint32_t level;
1588
1589 switch (signal_levels) {
1590 default:
1591 DRM_DEBUG_KMS("Unsupported voltage swing/pre-emphasis level: 0x%x\n",
1592 signal_levels);
1593 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_0:
1594 level = 0;
1595 break;
1596 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_1:
1597 level = 1;
1598 break;
1599 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_2:
1600 level = 2;
1601 break;
1602 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_3:
1603 level = 3;
1604 break;
1605
1606 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1 | DP_TRAIN_PRE_EMPH_LEVEL_0:
1607 level = 4;
1608 break;
1609 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1 | DP_TRAIN_PRE_EMPH_LEVEL_1:
1610 level = 5;
1611 break;
1612 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1 | DP_TRAIN_PRE_EMPH_LEVEL_2:
1613 level = 6;
1614 break;
1615
1616 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2 | DP_TRAIN_PRE_EMPH_LEVEL_0:
1617 level = 7;
1618 break;
1619 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2 | DP_TRAIN_PRE_EMPH_LEVEL_1:
1620 level = 8;
1621 break;
1622
1623 case DP_TRAIN_VOLTAGE_SWING_LEVEL_3 | DP_TRAIN_PRE_EMPH_LEVEL_0:
1624 level = 9;
1625 break;
1626 }
1627
1628 return level;
1629}
1630
1631uint32_t ddi_signal_levels(struct intel_dp *intel_dp)
1632{
1633 struct intel_digital_port *dport = dp_to_dig_port(intel_dp);
1634 struct drm_i915_private *dev_priv = to_i915(dport->base.base.dev);
1635 struct intel_encoder *encoder = &dport->base;
1636 uint8_t train_set = intel_dp->train_set[0];
1637 int signal_levels = train_set & (DP_TRAIN_VOLTAGE_SWING_MASK |
1638 DP_TRAIN_PRE_EMPHASIS_MASK);
1639 enum port port = dport->port;
1640 uint32_t level;
1641
1642 level = translate_signal_level(signal_levels);
1643
1644 if (IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv))
1645 skl_ddi_set_iboost(encoder, level);
1646 else if (IS_BROXTON(dev_priv))
1647 bxt_ddi_vswing_sequence(dev_priv, level, port, encoder->type);
1648
1649 return DDI_BUF_TRANS_SELECT(level);
1650}
1651
1652void intel_ddi_clk_select(struct intel_encoder *encoder,
1653 struct intel_shared_dpll *pll)
1654{
1655 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
1656 enum port port = intel_ddi_get_encoder_port(encoder);
1657
1658 if (WARN_ON(!pll))
1659 return;
1660
1661 if (IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv)) {
1662 uint32_t val;
1663
1664 /* DDI -> PLL mapping */
1665 val = I915_READ(DPLL_CTRL2);
1666
1667 val &= ~(DPLL_CTRL2_DDI_CLK_OFF(port) |
1668 DPLL_CTRL2_DDI_CLK_SEL_MASK(port));
1669 val |= (DPLL_CTRL2_DDI_CLK_SEL(pll->id, port) |
1670 DPLL_CTRL2_DDI_SEL_OVERRIDE(port));
1671
1672 I915_WRITE(DPLL_CTRL2, val);
1673
1674 } else if (INTEL_INFO(dev_priv)->gen < 9) {
1675 I915_WRITE(PORT_CLK_SEL(port), hsw_pll_to_ddi_pll_sel(pll));
1676 }
1677}
1678
1679static void intel_ddi_pre_enable_dp(struct intel_encoder *encoder,
1680 int link_rate, uint32_t lane_count,
1681 struct intel_shared_dpll *pll,
1682 bool link_mst)
1683{
1684 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
1685 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
1686 enum port port = intel_ddi_get_encoder_port(encoder);
1687
1688 intel_dp_set_link_params(intel_dp, link_rate, lane_count,
1689 link_mst);
1690 if (encoder->type == INTEL_OUTPUT_EDP)
1691 intel_edp_panel_on(intel_dp);
1692
1693 intel_ddi_clk_select(encoder, pll);
1694 intel_prepare_dp_ddi_buffers(encoder);
1695 intel_ddi_init_dp_buf_reg(encoder);
1696 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
1697 intel_dp_start_link_train(intel_dp);
1698 if (port != PORT_A || INTEL_GEN(dev_priv) >= 9)
1699 intel_dp_stop_link_train(intel_dp);
1700}
1701
1702static void intel_ddi_pre_enable_hdmi(struct intel_encoder *encoder,
1703 bool has_hdmi_sink,
1704 struct drm_display_mode *adjusted_mode,
1705 struct intel_shared_dpll *pll)
1706{
1707 struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(&encoder->base);
1708 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
1709 struct drm_encoder *drm_encoder = &encoder->base;
1710 enum port port = intel_ddi_get_encoder_port(encoder);
1711 int level = intel_ddi_hdmi_level(dev_priv, port);
1712
1713 intel_dp_dual_mode_set_tmds_output(intel_hdmi, true);
1714 intel_ddi_clk_select(encoder, pll);
1715 intel_prepare_hdmi_ddi_buffers(encoder);
1716 if (IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv))
1717 skl_ddi_set_iboost(encoder, level);
1718 else if (IS_BROXTON(dev_priv))
1719 bxt_ddi_vswing_sequence(dev_priv, level, port,
1720 INTEL_OUTPUT_HDMI);
1721
1722 intel_hdmi->set_infoframes(drm_encoder,
1723 has_hdmi_sink,
1724 adjusted_mode);
1725}
1726
1727static void intel_ddi_pre_enable(struct intel_encoder *intel_encoder,
1728 struct intel_crtc_state *pipe_config,
1729 struct drm_connector_state *conn_state)
1730{
1731 struct drm_encoder *encoder = &intel_encoder->base;
1732 struct intel_crtc *crtc = to_intel_crtc(encoder->crtc);
1733 int type = intel_encoder->type;
1734
1735 if (type == INTEL_OUTPUT_DP || type == INTEL_OUTPUT_EDP) {
1736 intel_ddi_pre_enable_dp(intel_encoder,
1737 crtc->config->port_clock,
1738 crtc->config->lane_count,
1739 crtc->config->shared_dpll,
1740 intel_crtc_has_type(crtc->config,
1741 INTEL_OUTPUT_DP_MST));
1742 }
1743 if (type == INTEL_OUTPUT_HDMI) {
1744 intel_ddi_pre_enable_hdmi(intel_encoder,
1745 crtc->config->has_hdmi_sink,
1746 &crtc->config->base.adjusted_mode,
1747 crtc->config->shared_dpll);
1748 }
1749}
1750
1751static void intel_ddi_post_disable(struct intel_encoder *intel_encoder,
1752 struct intel_crtc_state *old_crtc_state,
1753 struct drm_connector_state *old_conn_state)
1754{
1755 struct drm_encoder *encoder = &intel_encoder->base;
1756 struct drm_i915_private *dev_priv = to_i915(encoder->dev);
1757 enum port port = intel_ddi_get_encoder_port(intel_encoder);
1758 int type = intel_encoder->type;
1759 uint32_t val;
1760 bool wait = false;
1761
1762 /* old_crtc_state and old_conn_state are NULL when called from DP_MST */
1763
1764 val = I915_READ(DDI_BUF_CTL(port));
1765 if (val & DDI_BUF_CTL_ENABLE) {
1766 val &= ~DDI_BUF_CTL_ENABLE;
1767 I915_WRITE(DDI_BUF_CTL(port), val);
1768 wait = true;
1769 }
1770
1771 val = I915_READ(DP_TP_CTL(port));
1772 val &= ~(DP_TP_CTL_ENABLE | DP_TP_CTL_LINK_TRAIN_MASK);
1773 val |= DP_TP_CTL_LINK_TRAIN_PAT1;
1774 I915_WRITE(DP_TP_CTL(port), val);
1775
1776 if (wait)
1777 intel_wait_ddi_buf_idle(dev_priv, port);
1778
1779 if (type == INTEL_OUTPUT_DP || type == INTEL_OUTPUT_EDP) {
1780 struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
1781 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF);
1782 intel_edp_panel_vdd_on(intel_dp);
1783 intel_edp_panel_off(intel_dp);
1784 }
1785
1786 if (IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv))
1787 I915_WRITE(DPLL_CTRL2, (I915_READ(DPLL_CTRL2) |
1788 DPLL_CTRL2_DDI_CLK_OFF(port)));
1789 else if (INTEL_GEN(dev_priv) < 9)
1790 I915_WRITE(PORT_CLK_SEL(port), PORT_CLK_SEL_NONE);
1791
1792 if (type == INTEL_OUTPUT_HDMI) {
1793 struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
1794
1795 intel_dp_dual_mode_set_tmds_output(intel_hdmi, false);
1796 }
1797}
1798
1799void intel_ddi_fdi_post_disable(struct intel_encoder *intel_encoder,
1800 struct intel_crtc_state *old_crtc_state,
1801 struct drm_connector_state *old_conn_state)
1802{
1803 struct drm_i915_private *dev_priv = to_i915(intel_encoder->base.dev);
1804 uint32_t val;
1805
1806 /*
1807 * Bspec lists this as both step 13 (before DDI_BUF_CTL disable)
1808 * and step 18 (after clearing PORT_CLK_SEL). Based on a BUN,
1809 * step 13 is the correct place for it. Step 18 is where it was
1810 * originally before the BUN.
1811 */
1812 val = I915_READ(FDI_RX_CTL(PIPE_A));
1813 val &= ~FDI_RX_ENABLE;
1814 I915_WRITE(FDI_RX_CTL(PIPE_A), val);
1815
1816 intel_ddi_post_disable(intel_encoder, old_crtc_state, old_conn_state);
1817
1818 val = I915_READ(FDI_RX_MISC(PIPE_A));
1819 val &= ~(FDI_RX_PWRDN_LANE1_MASK | FDI_RX_PWRDN_LANE0_MASK);
1820 val |= FDI_RX_PWRDN_LANE1_VAL(2) | FDI_RX_PWRDN_LANE0_VAL(2);
1821 I915_WRITE(FDI_RX_MISC(PIPE_A), val);
1822
1823 val = I915_READ(FDI_RX_CTL(PIPE_A));
1824 val &= ~FDI_PCDCLK;
1825 I915_WRITE(FDI_RX_CTL(PIPE_A), val);
1826
1827 val = I915_READ(FDI_RX_CTL(PIPE_A));
1828 val &= ~FDI_RX_PLL_ENABLE;
1829 I915_WRITE(FDI_RX_CTL(PIPE_A), val);
1830}
1831
1832static void intel_enable_ddi(struct intel_encoder *intel_encoder,
1833 struct intel_crtc_state *pipe_config,
1834 struct drm_connector_state *conn_state)
1835{
1836 struct drm_encoder *encoder = &intel_encoder->base;
1837 struct drm_crtc *crtc = encoder->crtc;
1838 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
1839 struct drm_i915_private *dev_priv = to_i915(encoder->dev);
1840 enum port port = intel_ddi_get_encoder_port(intel_encoder);
1841 int type = intel_encoder->type;
1842
1843 if (type == INTEL_OUTPUT_HDMI) {
1844 struct intel_digital_port *intel_dig_port =
1845 enc_to_dig_port(encoder);
1846
1847 /* In HDMI/DVI mode, the port width, and swing/emphasis values
1848 * are ignored so nothing special needs to be done besides
1849 * enabling the port.
1850 */
1851 I915_WRITE(DDI_BUF_CTL(port),
1852 intel_dig_port->saved_port_bits |
1853 DDI_BUF_CTL_ENABLE);
1854 } else if (type == INTEL_OUTPUT_EDP) {
1855 struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
1856
1857 if (port == PORT_A && INTEL_GEN(dev_priv) < 9)
1858 intel_dp_stop_link_train(intel_dp);
1859
1860 intel_edp_backlight_on(intel_dp);
1861 intel_psr_enable(intel_dp);
1862 intel_edp_drrs_enable(intel_dp, pipe_config);
1863 }
1864
1865 if (intel_crtc->config->has_audio) {
1866 intel_display_power_get(dev_priv, POWER_DOMAIN_AUDIO);
1867 intel_audio_codec_enable(intel_encoder, pipe_config, conn_state);
1868 }
1869}
1870
1871static void intel_disable_ddi(struct intel_encoder *intel_encoder,
1872 struct intel_crtc_state *old_crtc_state,
1873 struct drm_connector_state *old_conn_state)
1874{
1875 struct drm_encoder *encoder = &intel_encoder->base;
1876 struct drm_crtc *crtc = encoder->crtc;
1877 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
1878 int type = intel_encoder->type;
1879 struct drm_device *dev = encoder->dev;
1880 struct drm_i915_private *dev_priv = to_i915(dev);
1881
1882 if (intel_crtc->config->has_audio) {
1883 intel_audio_codec_disable(intel_encoder);
1884 intel_display_power_put(dev_priv, POWER_DOMAIN_AUDIO);
1885 }
1886
1887 if (type == INTEL_OUTPUT_EDP) {
1888 struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
1889
1890 intel_edp_drrs_disable(intel_dp, old_crtc_state);
1891 intel_psr_disable(intel_dp);
1892 intel_edp_backlight_off(intel_dp);
1893 }
1894}
1895
1896static void bxt_ddi_pre_pll_enable(struct intel_encoder *encoder,
1897 struct intel_crtc_state *pipe_config,
1898 struct drm_connector_state *conn_state)
1899{
1900 struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
1901 uint8_t mask = intel_crtc->config->lane_lat_optim_mask;
1902
1903 bxt_ddi_phy_set_lane_optim_mask(encoder, mask);
1904}
1905
1906void intel_ddi_prepare_link_retrain(struct intel_dp *intel_dp)
1907{
1908 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
1909 struct drm_i915_private *dev_priv =
1910 to_i915(intel_dig_port->base.base.dev);
1911 enum port port = intel_dig_port->port;
1912 uint32_t val;
1913 bool wait = false;
1914
1915 if (I915_READ(DP_TP_CTL(port)) & DP_TP_CTL_ENABLE) {
1916 val = I915_READ(DDI_BUF_CTL(port));
1917 if (val & DDI_BUF_CTL_ENABLE) {
1918 val &= ~DDI_BUF_CTL_ENABLE;
1919 I915_WRITE(DDI_BUF_CTL(port), val);
1920 wait = true;
1921 }
1922
1923 val = I915_READ(DP_TP_CTL(port));
1924 val &= ~(DP_TP_CTL_ENABLE | DP_TP_CTL_LINK_TRAIN_MASK);
1925 val |= DP_TP_CTL_LINK_TRAIN_PAT1;
1926 I915_WRITE(DP_TP_CTL(port), val);
1927 POSTING_READ(DP_TP_CTL(port));
1928
1929 if (wait)
1930 intel_wait_ddi_buf_idle(dev_priv, port);
1931 }
1932
1933 val = DP_TP_CTL_ENABLE |
1934 DP_TP_CTL_LINK_TRAIN_PAT1 | DP_TP_CTL_SCRAMBLE_DISABLE;
1935 if (intel_dp->link_mst)
1936 val |= DP_TP_CTL_MODE_MST;
1937 else {
1938 val |= DP_TP_CTL_MODE_SST;
1939 if (drm_dp_enhanced_frame_cap(intel_dp->dpcd))
1940 val |= DP_TP_CTL_ENHANCED_FRAME_ENABLE;
1941 }
1942 I915_WRITE(DP_TP_CTL(port), val);
1943 POSTING_READ(DP_TP_CTL(port));
1944
1945 intel_dp->DP |= DDI_BUF_CTL_ENABLE;
1946 I915_WRITE(DDI_BUF_CTL(port), intel_dp->DP);
1947 POSTING_READ(DDI_BUF_CTL(port));
1948
1949 udelay(600);
1950}
1951
1952void intel_ddi_get_config(struct intel_encoder *encoder,
1953 struct intel_crtc_state *pipe_config)
1954{
1955 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
1956 struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
1957 enum transcoder cpu_transcoder = pipe_config->cpu_transcoder;
1958 struct intel_hdmi *intel_hdmi;
1959 u32 temp, flags = 0;
1960
1961 /* XXX: DSI transcoder paranoia */
1962 if (WARN_ON(transcoder_is_dsi(cpu_transcoder)))
1963 return;
1964
1965 temp = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder));
1966 if (temp & TRANS_DDI_PHSYNC)
1967 flags |= DRM_MODE_FLAG_PHSYNC;
1968 else
1969 flags |= DRM_MODE_FLAG_NHSYNC;
1970 if (temp & TRANS_DDI_PVSYNC)
1971 flags |= DRM_MODE_FLAG_PVSYNC;
1972 else
1973 flags |= DRM_MODE_FLAG_NVSYNC;
1974
1975 pipe_config->base.adjusted_mode.flags |= flags;
1976
1977 switch (temp & TRANS_DDI_BPC_MASK) {
1978 case TRANS_DDI_BPC_6:
1979 pipe_config->pipe_bpp = 18;
1980 break;
1981 case TRANS_DDI_BPC_8:
1982 pipe_config->pipe_bpp = 24;
1983 break;
1984 case TRANS_DDI_BPC_10:
1985 pipe_config->pipe_bpp = 30;
1986 break;
1987 case TRANS_DDI_BPC_12:
1988 pipe_config->pipe_bpp = 36;
1989 break;
1990 default:
1991 break;
1992 }
1993
1994 switch (temp & TRANS_DDI_MODE_SELECT_MASK) {
1995 case TRANS_DDI_MODE_SELECT_HDMI:
1996 pipe_config->has_hdmi_sink = true;
1997 intel_hdmi = enc_to_intel_hdmi(&encoder->base);
1998
1999 if (intel_hdmi->infoframe_enabled(&encoder->base, pipe_config))
2000 pipe_config->has_infoframe = true;
2001 /* fall through */
2002 case TRANS_DDI_MODE_SELECT_DVI:
2003 pipe_config->lane_count = 4;
2004 break;
2005 case TRANS_DDI_MODE_SELECT_FDI:
2006 break;
2007 case TRANS_DDI_MODE_SELECT_DP_SST:
2008 case TRANS_DDI_MODE_SELECT_DP_MST:
2009 pipe_config->lane_count =
2010 ((temp & DDI_PORT_WIDTH_MASK) >> DDI_PORT_WIDTH_SHIFT) + 1;
2011 intel_dp_get_m_n(intel_crtc, pipe_config);
2012 break;
2013 default:
2014 break;
2015 }
2016
2017 if (intel_display_power_is_enabled(dev_priv, POWER_DOMAIN_AUDIO)) {
2018 temp = I915_READ(HSW_AUD_PIN_ELD_CP_VLD);
2019 if (temp & AUDIO_OUTPUT_ENABLE(intel_crtc->pipe))
2020 pipe_config->has_audio = true;
2021 }
2022
2023 if (encoder->type == INTEL_OUTPUT_EDP && dev_priv->vbt.edp.bpp &&
2024 pipe_config->pipe_bpp > dev_priv->vbt.edp.bpp) {
2025 /*
2026 * This is a big fat ugly hack.
2027 *
2028 * Some machines in UEFI boot mode provide us a VBT that has 18
2029 * bpp and 1.62 GHz link bandwidth for eDP, which for reasons
2030 * unknown we fail to light up. Yet the same BIOS boots up with
2031 * 24 bpp and 2.7 GHz link. Use the same bpp as the BIOS uses as
2032 * max, not what it tells us to use.
2033 *
2034 * Note: This will still be broken if the eDP panel is not lit
2035 * up by the BIOS, and thus we can't get the mode at module
2036 * load.
2037 */
2038 DRM_DEBUG_KMS("pipe has %d bpp for eDP panel, overriding BIOS-provided max %d bpp\n",
2039 pipe_config->pipe_bpp, dev_priv->vbt.edp.bpp);
2040 dev_priv->vbt.edp.bpp = pipe_config->pipe_bpp;
2041 }
2042
2043 intel_ddi_clock_get(encoder, pipe_config);
2044
2045 if (IS_BROXTON(dev_priv))
2046 pipe_config->lane_lat_optim_mask =
2047 bxt_ddi_phy_get_lane_lat_optim_mask(encoder);
2048}
2049
2050static bool intel_ddi_compute_config(struct intel_encoder *encoder,
2051 struct intel_crtc_state *pipe_config,
2052 struct drm_connector_state *conn_state)
2053{
2054 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
2055 int type = encoder->type;
2056 int port = intel_ddi_get_encoder_port(encoder);
2057 int ret;
2058
2059 WARN(type == INTEL_OUTPUT_UNKNOWN, "compute_config() on unknown output!\n");
2060
2061 if (port == PORT_A)
2062 pipe_config->cpu_transcoder = TRANSCODER_EDP;
2063
2064 if (type == INTEL_OUTPUT_HDMI)
2065 ret = intel_hdmi_compute_config(encoder, pipe_config, conn_state);
2066 else
2067 ret = intel_dp_compute_config(encoder, pipe_config, conn_state);
2068
2069 if (IS_BROXTON(dev_priv) && ret)
2070 pipe_config->lane_lat_optim_mask =
2071 bxt_ddi_phy_calc_lane_lat_optim_mask(encoder,
2072 pipe_config->lane_count);
2073
2074 return ret;
2075
2076}
2077
2078static const struct drm_encoder_funcs intel_ddi_funcs = {
2079 .reset = intel_dp_encoder_reset,
2080 .destroy = intel_dp_encoder_destroy,
2081};
2082
2083static struct intel_connector *
2084intel_ddi_init_dp_connector(struct intel_digital_port *intel_dig_port)
2085{
2086 struct intel_connector *connector;
2087 enum port port = intel_dig_port->port;
2088
2089 connector = intel_connector_alloc();
2090 if (!connector)
2091 return NULL;
2092
2093 intel_dig_port->dp.output_reg = DDI_BUF_CTL(port);
2094 if (!intel_dp_init_connector(intel_dig_port, connector)) {
2095 kfree(connector);
2096 return NULL;
2097 }
2098
2099 return connector;
2100}
2101
2102static struct intel_connector *
2103intel_ddi_init_hdmi_connector(struct intel_digital_port *intel_dig_port)
2104{
2105 struct intel_connector *connector;
2106 enum port port = intel_dig_port->port;
2107
2108 connector = intel_connector_alloc();
2109 if (!connector)
2110 return NULL;
2111
2112 intel_dig_port->hdmi.hdmi_reg = DDI_BUF_CTL(port);
2113 intel_hdmi_init_connector(intel_dig_port, connector);
2114
2115 return connector;
2116}
2117
2118struct intel_shared_dpll *
2119intel_ddi_get_link_dpll(struct intel_dp *intel_dp, int clock)
2120{
2121 struct intel_connector *connector = intel_dp->attached_connector;
2122 struct intel_encoder *encoder = connector->encoder;
2123 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
2124 struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
2125 struct intel_shared_dpll *pll = NULL;
2126 struct intel_shared_dpll_config tmp_pll_config;
2127 enum intel_dpll_id dpll_id;
2128
2129 if (IS_BROXTON(dev_priv)) {
2130 dpll_id = (enum intel_dpll_id)dig_port->port;
2131 /*
2132 * Select the required PLL. This works for platforms where
2133 * there is no shared DPLL.
2134 */
2135 pll = &dev_priv->shared_dplls[dpll_id];
2136 if (WARN_ON(pll->active_mask)) {
2137
2138 DRM_ERROR("Shared DPLL in use. active_mask:%x\n",
2139 pll->active_mask);
2140 return NULL;
2141 }
2142 tmp_pll_config = pll->config;
2143 if (!bxt_ddi_dp_set_dpll_hw_state(clock,
2144 &pll->config.hw_state)) {
2145 DRM_ERROR("Could not setup DPLL\n");
2146 pll->config = tmp_pll_config;
2147 return NULL;
2148 }
2149 } else if (IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv)) {
2150 pll = skl_find_link_pll(dev_priv, clock);
2151 } else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) {
2152 pll = hsw_ddi_dp_get_dpll(encoder, clock);
2153 }
2154 return pll;
2155}
2156
2157void intel_ddi_init(struct drm_device *dev, enum port port)
2158{
2159 struct drm_i915_private *dev_priv = to_i915(dev);
2160 struct intel_digital_port *intel_dig_port;
2161 struct intel_encoder *intel_encoder;
2162 struct drm_encoder *encoder;
2163 bool init_hdmi, init_dp, init_lspcon = false;
2164 int max_lanes;
2165
2166 if (I915_READ(DDI_BUF_CTL(PORT_A)) & DDI_A_4_LANES) {
2167 switch (port) {
2168 case PORT_A:
2169 max_lanes = 4;
2170 break;
2171 case PORT_E:
2172 max_lanes = 0;
2173 break;
2174 default:
2175 max_lanes = 4;
2176 break;
2177 }
2178 } else {
2179 switch (port) {
2180 case PORT_A:
2181 max_lanes = 2;
2182 break;
2183 case PORT_E:
2184 max_lanes = 2;
2185 break;
2186 default:
2187 max_lanes = 4;
2188 break;
2189 }
2190 }
2191
2192 init_hdmi = (dev_priv->vbt.ddi_port_info[port].supports_dvi ||
2193 dev_priv->vbt.ddi_port_info[port].supports_hdmi);
2194 init_dp = dev_priv->vbt.ddi_port_info[port].supports_dp;
2195
2196 if (intel_bios_is_lspcon_present(dev_priv, port)) {
2197 /*
2198 * Lspcon device needs to be driven with DP connector
2199 * with special detection sequence. So make sure DP
2200 * is initialized before lspcon.
2201 */
2202 init_dp = true;
2203 init_lspcon = true;
2204 init_hdmi = false;
2205 DRM_DEBUG_KMS("VBT says port %c has lspcon\n", port_name(port));
2206 }
2207
2208 if (!init_dp && !init_hdmi) {
2209 DRM_DEBUG_KMS("VBT says port %c is not DVI/HDMI/DP compatible, respect it\n",
2210 port_name(port));
2211 return;
2212 }
2213
2214 intel_dig_port = kzalloc(sizeof(*intel_dig_port), GFP_KERNEL);
2215 if (!intel_dig_port)
2216 return;
2217
2218 intel_encoder = &intel_dig_port->base;
2219 encoder = &intel_encoder->base;
2220
2221 drm_encoder_init(dev, encoder, &intel_ddi_funcs,
2222 DRM_MODE_ENCODER_TMDS, "DDI %c", port_name(port));
2223
2224 intel_encoder->compute_config = intel_ddi_compute_config;
2225 intel_encoder->enable = intel_enable_ddi;
2226 if (IS_BROXTON(dev_priv))
2227 intel_encoder->pre_pll_enable = bxt_ddi_pre_pll_enable;
2228 intel_encoder->pre_enable = intel_ddi_pre_enable;
2229 intel_encoder->disable = intel_disable_ddi;
2230 intel_encoder->post_disable = intel_ddi_post_disable;
2231 intel_encoder->get_hw_state = intel_ddi_get_hw_state;
2232 intel_encoder->get_config = intel_ddi_get_config;
2233 intel_encoder->suspend = intel_dp_encoder_suspend;
2234
2235 intel_dig_port->port = port;
2236 intel_dig_port->saved_port_bits = I915_READ(DDI_BUF_CTL(port)) &
2237 (DDI_BUF_PORT_REVERSAL |
2238 DDI_A_4_LANES);
2239
2240 /*
2241 * Bspec says that DDI_A_4_LANES is the only supported configuration
2242 * for Broxton. Yet some BIOS fail to set this bit on port A if eDP
2243 * wasn't lit up at boot. Force this bit on in our internal
2244 * configuration so that we use the proper lane count for our
2245 * calculations.
2246 */
2247 if (IS_BROXTON(dev_priv) && port == PORT_A) {
2248 if (!(intel_dig_port->saved_port_bits & DDI_A_4_LANES)) {
2249 DRM_DEBUG_KMS("BXT BIOS forgot to set DDI_A_4_LANES for port A; fixing\n");
2250 intel_dig_port->saved_port_bits |= DDI_A_4_LANES;
2251 max_lanes = 4;
2252 }
2253 }
2254
2255 intel_dig_port->max_lanes = max_lanes;
2256
2257 intel_encoder->type = INTEL_OUTPUT_UNKNOWN;
2258 intel_encoder->port = port;
2259 intel_encoder->crtc_mask = (1 << 0) | (1 << 1) | (1 << 2);
2260 intel_encoder->cloneable = 0;
2261
2262 if (init_dp) {
2263 if (!intel_ddi_init_dp_connector(intel_dig_port))
2264 goto err;
2265
2266 intel_dig_port->hpd_pulse = intel_dp_hpd_pulse;
2267 /*
2268 * On BXT A0/A1, sw needs to activate DDIA HPD logic and
2269 * interrupts to check the external panel connection.
2270 */
2271 if (IS_BXT_REVID(dev_priv, 0, BXT_REVID_A1) && port == PORT_B)
2272 dev_priv->hotplug.irq_port[PORT_A] = intel_dig_port;
2273 else
2274 dev_priv->hotplug.irq_port[port] = intel_dig_port;
2275 }
2276
2277 /* In theory we don't need the encoder->type check, but leave it just in
2278 * case we have some really bad VBTs... */
2279 if (intel_encoder->type != INTEL_OUTPUT_EDP && init_hdmi) {
2280 if (!intel_ddi_init_hdmi_connector(intel_dig_port))
2281 goto err;
2282 }
2283
2284 if (init_lspcon) {
2285 if (lspcon_init(intel_dig_port))
2286 /* TODO: handle hdmi info frame part */
2287 DRM_DEBUG_KMS("LSPCON init success on port %c\n",
2288 port_name(port));
2289 else
2290 /*
2291 * LSPCON init faied, but DP init was success, so
2292 * lets try to drive as DP++ port.
2293 */
2294 DRM_ERROR("LSPCON init failed on port %c\n",
2295 port_name(port));
2296 }
2297
2298 return;
2299
2300err:
2301 drm_encoder_cleanup(encoder);
2302 kfree(intel_dig_port);
2303}