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Merge remote-tracking branch 'battery/for-next'
[deliverable/linux.git] / drivers / gpu / drm / i915 / intel_ddi.c
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
31 struct 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 */
41 static 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
53 static 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
65 static 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
81 static 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
93 static 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
105 static 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
117 static 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 */
132 static 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 */
145 static 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 */
158 static 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 /*
171 * Skylake H and S
172 * eDP 1.4 low vswing translation parameters
173 */
174 static const struct ddi_buf_trans skl_ddi_translations_edp[] = {
175 { 0x00000018, 0x000000A8, 0x0 },
176 { 0x00004013, 0x000000A9, 0x0 },
177 { 0x00007011, 0x000000A2, 0x0 },
178 { 0x00009010, 0x0000009C, 0x0 },
179 { 0x00000018, 0x000000A9, 0x0 },
180 { 0x00006013, 0x000000A2, 0x0 },
181 { 0x00007011, 0x000000A6, 0x0 },
182 { 0x00000018, 0x000000AB, 0x0 },
183 { 0x00007013, 0x0000009F, 0x0 },
184 { 0x00000018, 0x000000DF, 0x0 },
185 };
186
187 /*
188 * Skylake U
189 * eDP 1.4 low vswing translation parameters
190 */
191 static const struct ddi_buf_trans skl_u_ddi_translations_edp[] = {
192 { 0x00000018, 0x000000A8, 0x0 },
193 { 0x00004013, 0x000000A9, 0x0 },
194 { 0x00007011, 0x000000A2, 0x0 },
195 { 0x00009010, 0x0000009C, 0x0 },
196 { 0x00000018, 0x000000A9, 0x0 },
197 { 0x00006013, 0x000000A2, 0x0 },
198 { 0x00007011, 0x000000A6, 0x0 },
199 { 0x00002016, 0x000000AB, 0x0 },
200 { 0x00005013, 0x0000009F, 0x0 },
201 { 0x00000018, 0x000000DF, 0x0 },
202 };
203
204 /*
205 * Skylake Y
206 * eDP 1.4 low vswing translation parameters
207 */
208 static const struct ddi_buf_trans skl_y_ddi_translations_edp[] = {
209 { 0x00000018, 0x000000A8, 0x0 },
210 { 0x00004013, 0x000000AB, 0x0 },
211 { 0x00007011, 0x000000A4, 0x0 },
212 { 0x00009010, 0x000000DF, 0x0 },
213 { 0x00000018, 0x000000AA, 0x0 },
214 { 0x00006013, 0x000000A4, 0x0 },
215 { 0x00007011, 0x0000009D, 0x0 },
216 { 0x00000018, 0x000000A0, 0x0 },
217 { 0x00006012, 0x000000DF, 0x0 },
218 { 0x00000018, 0x0000008A, 0x0 },
219 };
220
221 /* Skylake U, H and S */
222 static const struct ddi_buf_trans skl_ddi_translations_hdmi[] = {
223 { 0x00000018, 0x000000AC, 0x0 },
224 { 0x00005012, 0x0000009D, 0x0 },
225 { 0x00007011, 0x00000088, 0x0 },
226 { 0x00000018, 0x000000A1, 0x0 },
227 { 0x00000018, 0x00000098, 0x0 },
228 { 0x00004013, 0x00000088, 0x0 },
229 { 0x80006012, 0x000000CD, 0x1 },
230 { 0x00000018, 0x000000DF, 0x0 },
231 { 0x80003015, 0x000000CD, 0x1 }, /* Default */
232 { 0x80003015, 0x000000C0, 0x1 },
233 { 0x80000018, 0x000000C0, 0x1 },
234 };
235
236 /* Skylake Y */
237 static const struct ddi_buf_trans skl_y_ddi_translations_hdmi[] = {
238 { 0x00000018, 0x000000A1, 0x0 },
239 { 0x00005012, 0x000000DF, 0x0 },
240 { 0x80007011, 0x000000CB, 0x3 },
241 { 0x00000018, 0x000000A4, 0x0 },
242 { 0x00000018, 0x0000009D, 0x0 },
243 { 0x00004013, 0x00000080, 0x0 },
244 { 0x80006013, 0x000000C0, 0x3 },
245 { 0x00000018, 0x0000008A, 0x0 },
246 { 0x80003015, 0x000000C0, 0x3 }, /* Default */
247 { 0x80003015, 0x000000C0, 0x3 },
248 { 0x80000018, 0x000000C0, 0x3 },
249 };
250
251 struct bxt_ddi_buf_trans {
252 u32 margin; /* swing value */
253 u32 scale; /* scale value */
254 u32 enable; /* scale enable */
255 u32 deemphasis;
256 bool default_index; /* true if the entry represents default value */
257 };
258
259 static const struct bxt_ddi_buf_trans bxt_ddi_translations_dp[] = {
260 /* Idx NT mV diff db */
261 { 52, 0x9A, 0, 128, true }, /* 0: 400 0 */
262 { 78, 0x9A, 0, 85, false }, /* 1: 400 3.5 */
263 { 104, 0x9A, 0, 64, false }, /* 2: 400 6 */
264 { 154, 0x9A, 0, 43, false }, /* 3: 400 9.5 */
265 { 77, 0x9A, 0, 128, false }, /* 4: 600 0 */
266 { 116, 0x9A, 0, 85, false }, /* 5: 600 3.5 */
267 { 154, 0x9A, 0, 64, false }, /* 6: 600 6 */
268 { 102, 0x9A, 0, 128, false }, /* 7: 800 0 */
269 { 154, 0x9A, 0, 85, false }, /* 8: 800 3.5 */
270 { 154, 0x9A, 1, 128, false }, /* 9: 1200 0 */
271 };
272
273 static const struct bxt_ddi_buf_trans bxt_ddi_translations_edp[] = {
274 /* Idx NT mV diff db */
275 { 26, 0, 0, 128, false }, /* 0: 200 0 */
276 { 38, 0, 0, 112, false }, /* 1: 200 1.5 */
277 { 48, 0, 0, 96, false }, /* 2: 200 4 */
278 { 54, 0, 0, 69, false }, /* 3: 200 6 */
279 { 32, 0, 0, 128, false }, /* 4: 250 0 */
280 { 48, 0, 0, 104, false }, /* 5: 250 1.5 */
281 { 54, 0, 0, 85, false }, /* 6: 250 4 */
282 { 43, 0, 0, 128, false }, /* 7: 300 0 */
283 { 54, 0, 0, 101, false }, /* 8: 300 1.5 */
284 { 48, 0, 0, 128, false }, /* 9: 300 0 */
285 };
286
287 /* BSpec has 2 recommended values - entries 0 and 8.
288 * Using the entry with higher vswing.
289 */
290 static const struct bxt_ddi_buf_trans bxt_ddi_translations_hdmi[] = {
291 /* Idx NT mV diff db */
292 { 52, 0x9A, 0, 128, false }, /* 0: 400 0 */
293 { 52, 0x9A, 0, 85, false }, /* 1: 400 3.5 */
294 { 52, 0x9A, 0, 64, false }, /* 2: 400 6 */
295 { 42, 0x9A, 0, 43, false }, /* 3: 400 9.5 */
296 { 77, 0x9A, 0, 128, false }, /* 4: 600 0 */
297 { 77, 0x9A, 0, 85, false }, /* 5: 600 3.5 */
298 { 77, 0x9A, 0, 64, false }, /* 6: 600 6 */
299 { 102, 0x9A, 0, 128, false }, /* 7: 800 0 */
300 { 102, 0x9A, 0, 85, false }, /* 8: 800 3.5 */
301 { 154, 0x9A, 1, 128, true }, /* 9: 1200 0 */
302 };
303
304 enum port intel_ddi_get_encoder_port(struct intel_encoder *encoder)
305 {
306 switch (encoder->type) {
307 case INTEL_OUTPUT_DP_MST:
308 return enc_to_mst(&encoder->base)->primary->port;
309 case INTEL_OUTPUT_DP:
310 case INTEL_OUTPUT_EDP:
311 case INTEL_OUTPUT_HDMI:
312 case INTEL_OUTPUT_UNKNOWN:
313 return enc_to_dig_port(&encoder->base)->port;
314 case INTEL_OUTPUT_ANALOG:
315 return PORT_E;
316 default:
317 MISSING_CASE(encoder->type);
318 return PORT_A;
319 }
320 }
321
322 static const struct ddi_buf_trans *
323 bdw_get_buf_trans_edp(struct drm_i915_private *dev_priv, int *n_entries)
324 {
325 if (dev_priv->vbt.edp.low_vswing) {
326 *n_entries = ARRAY_SIZE(bdw_ddi_translations_edp);
327 return bdw_ddi_translations_edp;
328 } else {
329 *n_entries = ARRAY_SIZE(bdw_ddi_translations_dp);
330 return bdw_ddi_translations_dp;
331 }
332 }
333
334 static const struct ddi_buf_trans *
335 skl_get_buf_trans_dp(struct drm_i915_private *dev_priv, int *n_entries)
336 {
337 if (IS_SKL_ULX(dev_priv) || IS_KBL_ULX(dev_priv)) {
338 *n_entries = ARRAY_SIZE(skl_y_ddi_translations_dp);
339 return skl_y_ddi_translations_dp;
340 } else if (IS_SKL_ULT(dev_priv) || IS_KBL_ULT(dev_priv)) {
341 *n_entries = ARRAY_SIZE(skl_u_ddi_translations_dp);
342 return skl_u_ddi_translations_dp;
343 } else {
344 *n_entries = ARRAY_SIZE(skl_ddi_translations_dp);
345 return skl_ddi_translations_dp;
346 }
347 }
348
349 static const struct ddi_buf_trans *
350 skl_get_buf_trans_edp(struct drm_i915_private *dev_priv, int *n_entries)
351 {
352 if (dev_priv->vbt.edp.low_vswing) {
353 if (IS_SKL_ULX(dev_priv) || IS_KBL_ULX(dev_priv)) {
354 *n_entries = ARRAY_SIZE(skl_y_ddi_translations_edp);
355 return skl_y_ddi_translations_edp;
356 } else if (IS_SKL_ULT(dev_priv) || IS_KBL_ULT(dev_priv)) {
357 *n_entries = ARRAY_SIZE(skl_u_ddi_translations_edp);
358 return skl_u_ddi_translations_edp;
359 } else {
360 *n_entries = ARRAY_SIZE(skl_ddi_translations_edp);
361 return skl_ddi_translations_edp;
362 }
363 }
364
365 return skl_get_buf_trans_dp(dev_priv, n_entries);
366 }
367
368 static const struct ddi_buf_trans *
369 skl_get_buf_trans_hdmi(struct drm_i915_private *dev_priv, int *n_entries)
370 {
371 if (IS_SKL_ULX(dev_priv) || IS_KBL_ULX(dev_priv)) {
372 *n_entries = ARRAY_SIZE(skl_y_ddi_translations_hdmi);
373 return skl_y_ddi_translations_hdmi;
374 } else {
375 *n_entries = ARRAY_SIZE(skl_ddi_translations_hdmi);
376 return skl_ddi_translations_hdmi;
377 }
378 }
379
380 static int intel_ddi_hdmi_level(struct drm_i915_private *dev_priv, enum port port)
381 {
382 int n_hdmi_entries;
383 int hdmi_level;
384 int hdmi_default_entry;
385
386 hdmi_level = dev_priv->vbt.ddi_port_info[port].hdmi_level_shift;
387
388 if (IS_BROXTON(dev_priv))
389 return hdmi_level;
390
391 if (IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv)) {
392 skl_get_buf_trans_hdmi(dev_priv, &n_hdmi_entries);
393 hdmi_default_entry = 8;
394 } else if (IS_BROADWELL(dev_priv)) {
395 n_hdmi_entries = ARRAY_SIZE(bdw_ddi_translations_hdmi);
396 hdmi_default_entry = 7;
397 } else if (IS_HASWELL(dev_priv)) {
398 n_hdmi_entries = ARRAY_SIZE(hsw_ddi_translations_hdmi);
399 hdmi_default_entry = 6;
400 } else {
401 WARN(1, "ddi translation table missing\n");
402 n_hdmi_entries = ARRAY_SIZE(bdw_ddi_translations_hdmi);
403 hdmi_default_entry = 7;
404 }
405
406 /* Choose a good default if VBT is badly populated */
407 if (hdmi_level == HDMI_LEVEL_SHIFT_UNKNOWN ||
408 hdmi_level >= n_hdmi_entries)
409 hdmi_level = hdmi_default_entry;
410
411 return hdmi_level;
412 }
413
414 /*
415 * Starting with Haswell, DDI port buffers must be programmed with correct
416 * values in advance. This function programs the correct values for
417 * DP/eDP/FDI use cases.
418 */
419 void intel_prepare_dp_ddi_buffers(struct intel_encoder *encoder)
420 {
421 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
422 u32 iboost_bit = 0;
423 int i, n_dp_entries, n_edp_entries, size;
424 enum port port = intel_ddi_get_encoder_port(encoder);
425 const struct ddi_buf_trans *ddi_translations_fdi;
426 const struct ddi_buf_trans *ddi_translations_dp;
427 const struct ddi_buf_trans *ddi_translations_edp;
428 const struct ddi_buf_trans *ddi_translations;
429
430 if (IS_BROXTON(dev_priv))
431 return;
432
433 if (IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv)) {
434 ddi_translations_fdi = NULL;
435 ddi_translations_dp =
436 skl_get_buf_trans_dp(dev_priv, &n_dp_entries);
437 ddi_translations_edp =
438 skl_get_buf_trans_edp(dev_priv, &n_edp_entries);
439
440 /* If we're boosting the current, set bit 31 of trans1 */
441 if (dev_priv->vbt.ddi_port_info[port].dp_boost_level)
442 iboost_bit = DDI_BUF_BALANCE_LEG_ENABLE;
443
444 if (WARN_ON(encoder->type == INTEL_OUTPUT_EDP &&
445 port != PORT_A && port != PORT_E &&
446 n_edp_entries > 9))
447 n_edp_entries = 9;
448 } else if (IS_BROADWELL(dev_priv)) {
449 ddi_translations_fdi = bdw_ddi_translations_fdi;
450 ddi_translations_dp = bdw_ddi_translations_dp;
451 ddi_translations_edp = bdw_get_buf_trans_edp(dev_priv, &n_edp_entries);
452 n_dp_entries = ARRAY_SIZE(bdw_ddi_translations_dp);
453 } else if (IS_HASWELL(dev_priv)) {
454 ddi_translations_fdi = hsw_ddi_translations_fdi;
455 ddi_translations_dp = hsw_ddi_translations_dp;
456 ddi_translations_edp = hsw_ddi_translations_dp;
457 n_dp_entries = n_edp_entries = ARRAY_SIZE(hsw_ddi_translations_dp);
458 } else {
459 WARN(1, "ddi translation table missing\n");
460 ddi_translations_edp = bdw_ddi_translations_dp;
461 ddi_translations_fdi = bdw_ddi_translations_fdi;
462 ddi_translations_dp = bdw_ddi_translations_dp;
463 n_edp_entries = ARRAY_SIZE(bdw_ddi_translations_edp);
464 n_dp_entries = ARRAY_SIZE(bdw_ddi_translations_dp);
465 }
466
467 switch (encoder->type) {
468 case INTEL_OUTPUT_EDP:
469 ddi_translations = ddi_translations_edp;
470 size = n_edp_entries;
471 break;
472 case INTEL_OUTPUT_DP:
473 ddi_translations = ddi_translations_dp;
474 size = n_dp_entries;
475 break;
476 case INTEL_OUTPUT_ANALOG:
477 ddi_translations = ddi_translations_fdi;
478 size = n_dp_entries;
479 break;
480 default:
481 BUG();
482 }
483
484 for (i = 0; i < size; i++) {
485 I915_WRITE(DDI_BUF_TRANS_LO(port, i),
486 ddi_translations[i].trans1 | iboost_bit);
487 I915_WRITE(DDI_BUF_TRANS_HI(port, i),
488 ddi_translations[i].trans2);
489 }
490 }
491
492 /*
493 * Starting with Haswell, DDI port buffers must be programmed with correct
494 * values in advance. This function programs the correct values for
495 * HDMI/DVI use cases.
496 */
497 static void intel_prepare_hdmi_ddi_buffers(struct intel_encoder *encoder)
498 {
499 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
500 u32 iboost_bit = 0;
501 int n_hdmi_entries, hdmi_level;
502 enum port port = intel_ddi_get_encoder_port(encoder);
503 const struct ddi_buf_trans *ddi_translations_hdmi;
504
505 if (IS_BROXTON(dev_priv))
506 return;
507
508 hdmi_level = intel_ddi_hdmi_level(dev_priv, port);
509
510 if (IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv)) {
511 ddi_translations_hdmi = skl_get_buf_trans_hdmi(dev_priv, &n_hdmi_entries);
512
513 /* If we're boosting the current, set bit 31 of trans1 */
514 if (dev_priv->vbt.ddi_port_info[port].hdmi_boost_level)
515 iboost_bit = DDI_BUF_BALANCE_LEG_ENABLE;
516 } else if (IS_BROADWELL(dev_priv)) {
517 ddi_translations_hdmi = bdw_ddi_translations_hdmi;
518 n_hdmi_entries = ARRAY_SIZE(bdw_ddi_translations_hdmi);
519 } else if (IS_HASWELL(dev_priv)) {
520 ddi_translations_hdmi = hsw_ddi_translations_hdmi;
521 n_hdmi_entries = ARRAY_SIZE(hsw_ddi_translations_hdmi);
522 } else {
523 WARN(1, "ddi translation table missing\n");
524 ddi_translations_hdmi = bdw_ddi_translations_hdmi;
525 n_hdmi_entries = ARRAY_SIZE(bdw_ddi_translations_hdmi);
526 }
527
528 /* Entry 9 is for HDMI: */
529 I915_WRITE(DDI_BUF_TRANS_LO(port, 9),
530 ddi_translations_hdmi[hdmi_level].trans1 | iboost_bit);
531 I915_WRITE(DDI_BUF_TRANS_HI(port, 9),
532 ddi_translations_hdmi[hdmi_level].trans2);
533 }
534
535 static void intel_wait_ddi_buf_idle(struct drm_i915_private *dev_priv,
536 enum port port)
537 {
538 i915_reg_t reg = DDI_BUF_CTL(port);
539 int i;
540
541 for (i = 0; i < 16; i++) {
542 udelay(1);
543 if (I915_READ(reg) & DDI_BUF_IS_IDLE)
544 return;
545 }
546 DRM_ERROR("Timeout waiting for DDI BUF %c idle bit\n", port_name(port));
547 }
548
549 static uint32_t hsw_pll_to_ddi_pll_sel(struct intel_shared_dpll *pll)
550 {
551 switch (pll->id) {
552 case DPLL_ID_WRPLL1:
553 return PORT_CLK_SEL_WRPLL1;
554 case DPLL_ID_WRPLL2:
555 return PORT_CLK_SEL_WRPLL2;
556 case DPLL_ID_SPLL:
557 return PORT_CLK_SEL_SPLL;
558 case DPLL_ID_LCPLL_810:
559 return PORT_CLK_SEL_LCPLL_810;
560 case DPLL_ID_LCPLL_1350:
561 return PORT_CLK_SEL_LCPLL_1350;
562 case DPLL_ID_LCPLL_2700:
563 return PORT_CLK_SEL_LCPLL_2700;
564 default:
565 MISSING_CASE(pll->id);
566 return PORT_CLK_SEL_NONE;
567 }
568 }
569
570 /* Starting with Haswell, different DDI ports can work in FDI mode for
571 * connection to the PCH-located connectors. For this, it is necessary to train
572 * both the DDI port and PCH receiver for the desired DDI buffer settings.
573 *
574 * The recommended port to work in FDI mode is DDI E, which we use here. Also,
575 * please note that when FDI mode is active on DDI E, it shares 2 lines with
576 * DDI A (which is used for eDP)
577 */
578
579 void hsw_fdi_link_train(struct drm_crtc *crtc)
580 {
581 struct drm_device *dev = crtc->dev;
582 struct drm_i915_private *dev_priv = to_i915(dev);
583 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
584 struct intel_encoder *encoder;
585 u32 temp, i, rx_ctl_val, ddi_pll_sel;
586
587 for_each_encoder_on_crtc(dev, crtc, encoder) {
588 WARN_ON(encoder->type != INTEL_OUTPUT_ANALOG);
589 intel_prepare_dp_ddi_buffers(encoder);
590 }
591
592 /* Set the FDI_RX_MISC pwrdn lanes and the 2 workarounds listed at the
593 * mode set "sequence for CRT port" document:
594 * - TP1 to TP2 time with the default value
595 * - FDI delay to 90h
596 *
597 * WaFDIAutoLinkSetTimingOverrride:hsw
598 */
599 I915_WRITE(FDI_RX_MISC(PIPE_A), FDI_RX_PWRDN_LANE1_VAL(2) |
600 FDI_RX_PWRDN_LANE0_VAL(2) |
601 FDI_RX_TP1_TO_TP2_48 | FDI_RX_FDI_DELAY_90);
602
603 /* Enable the PCH Receiver FDI PLL */
604 rx_ctl_val = dev_priv->fdi_rx_config | FDI_RX_ENHANCE_FRAME_ENABLE |
605 FDI_RX_PLL_ENABLE |
606 FDI_DP_PORT_WIDTH(intel_crtc->config->fdi_lanes);
607 I915_WRITE(FDI_RX_CTL(PIPE_A), rx_ctl_val);
608 POSTING_READ(FDI_RX_CTL(PIPE_A));
609 udelay(220);
610
611 /* Switch from Rawclk to PCDclk */
612 rx_ctl_val |= FDI_PCDCLK;
613 I915_WRITE(FDI_RX_CTL(PIPE_A), rx_ctl_val);
614
615 /* Configure Port Clock Select */
616 ddi_pll_sel = hsw_pll_to_ddi_pll_sel(intel_crtc->config->shared_dpll);
617 I915_WRITE(PORT_CLK_SEL(PORT_E), ddi_pll_sel);
618 WARN_ON(ddi_pll_sel != PORT_CLK_SEL_SPLL);
619
620 /* Start the training iterating through available voltages and emphasis,
621 * testing each value twice. */
622 for (i = 0; i < ARRAY_SIZE(hsw_ddi_translations_fdi) * 2; i++) {
623 /* Configure DP_TP_CTL with auto-training */
624 I915_WRITE(DP_TP_CTL(PORT_E),
625 DP_TP_CTL_FDI_AUTOTRAIN |
626 DP_TP_CTL_ENHANCED_FRAME_ENABLE |
627 DP_TP_CTL_LINK_TRAIN_PAT1 |
628 DP_TP_CTL_ENABLE);
629
630 /* Configure and enable DDI_BUF_CTL for DDI E with next voltage.
631 * DDI E does not support port reversal, the functionality is
632 * achieved on the PCH side in FDI_RX_CTL, so no need to set the
633 * port reversal bit */
634 I915_WRITE(DDI_BUF_CTL(PORT_E),
635 DDI_BUF_CTL_ENABLE |
636 ((intel_crtc->config->fdi_lanes - 1) << 1) |
637 DDI_BUF_TRANS_SELECT(i / 2));
638 POSTING_READ(DDI_BUF_CTL(PORT_E));
639
640 udelay(600);
641
642 /* Program PCH FDI Receiver TU */
643 I915_WRITE(FDI_RX_TUSIZE1(PIPE_A), TU_SIZE(64));
644
645 /* Enable PCH FDI Receiver with auto-training */
646 rx_ctl_val |= FDI_RX_ENABLE | FDI_LINK_TRAIN_AUTO;
647 I915_WRITE(FDI_RX_CTL(PIPE_A), rx_ctl_val);
648 POSTING_READ(FDI_RX_CTL(PIPE_A));
649
650 /* Wait for FDI receiver lane calibration */
651 udelay(30);
652
653 /* Unset FDI_RX_MISC pwrdn lanes */
654 temp = I915_READ(FDI_RX_MISC(PIPE_A));
655 temp &= ~(FDI_RX_PWRDN_LANE1_MASK | FDI_RX_PWRDN_LANE0_MASK);
656 I915_WRITE(FDI_RX_MISC(PIPE_A), temp);
657 POSTING_READ(FDI_RX_MISC(PIPE_A));
658
659 /* Wait for FDI auto training time */
660 udelay(5);
661
662 temp = I915_READ(DP_TP_STATUS(PORT_E));
663 if (temp & DP_TP_STATUS_AUTOTRAIN_DONE) {
664 DRM_DEBUG_KMS("FDI link training done on step %d\n", i);
665 break;
666 }
667
668 /*
669 * Leave things enabled even if we failed to train FDI.
670 * Results in less fireworks from the state checker.
671 */
672 if (i == ARRAY_SIZE(hsw_ddi_translations_fdi) * 2 - 1) {
673 DRM_ERROR("FDI link training failed!\n");
674 break;
675 }
676
677 rx_ctl_val &= ~FDI_RX_ENABLE;
678 I915_WRITE(FDI_RX_CTL(PIPE_A), rx_ctl_val);
679 POSTING_READ(FDI_RX_CTL(PIPE_A));
680
681 temp = I915_READ(DDI_BUF_CTL(PORT_E));
682 temp &= ~DDI_BUF_CTL_ENABLE;
683 I915_WRITE(DDI_BUF_CTL(PORT_E), temp);
684 POSTING_READ(DDI_BUF_CTL(PORT_E));
685
686 /* Disable DP_TP_CTL and FDI_RX_CTL and retry */
687 temp = I915_READ(DP_TP_CTL(PORT_E));
688 temp &= ~(DP_TP_CTL_ENABLE | DP_TP_CTL_LINK_TRAIN_MASK);
689 temp |= DP_TP_CTL_LINK_TRAIN_PAT1;
690 I915_WRITE(DP_TP_CTL(PORT_E), temp);
691 POSTING_READ(DP_TP_CTL(PORT_E));
692
693 intel_wait_ddi_buf_idle(dev_priv, PORT_E);
694
695 /* Reset FDI_RX_MISC pwrdn lanes */
696 temp = I915_READ(FDI_RX_MISC(PIPE_A));
697 temp &= ~(FDI_RX_PWRDN_LANE1_MASK | FDI_RX_PWRDN_LANE0_MASK);
698 temp |= FDI_RX_PWRDN_LANE1_VAL(2) | FDI_RX_PWRDN_LANE0_VAL(2);
699 I915_WRITE(FDI_RX_MISC(PIPE_A), temp);
700 POSTING_READ(FDI_RX_MISC(PIPE_A));
701 }
702
703 /* Enable normal pixel sending for FDI */
704 I915_WRITE(DP_TP_CTL(PORT_E),
705 DP_TP_CTL_FDI_AUTOTRAIN |
706 DP_TP_CTL_LINK_TRAIN_NORMAL |
707 DP_TP_CTL_ENHANCED_FRAME_ENABLE |
708 DP_TP_CTL_ENABLE);
709 }
710
711 void intel_ddi_init_dp_buf_reg(struct intel_encoder *encoder)
712 {
713 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
714 struct intel_digital_port *intel_dig_port =
715 enc_to_dig_port(&encoder->base);
716
717 intel_dp->DP = intel_dig_port->saved_port_bits |
718 DDI_BUF_CTL_ENABLE | DDI_BUF_TRANS_SELECT(0);
719 intel_dp->DP |= DDI_PORT_WIDTH(intel_dp->lane_count);
720 }
721
722 static struct intel_encoder *
723 intel_ddi_get_crtc_encoder(struct drm_crtc *crtc)
724 {
725 struct drm_device *dev = crtc->dev;
726 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
727 struct intel_encoder *intel_encoder, *ret = NULL;
728 int num_encoders = 0;
729
730 for_each_encoder_on_crtc(dev, crtc, intel_encoder) {
731 ret = intel_encoder;
732 num_encoders++;
733 }
734
735 if (num_encoders != 1)
736 WARN(1, "%d encoders on crtc for pipe %c\n", num_encoders,
737 pipe_name(intel_crtc->pipe));
738
739 BUG_ON(ret == NULL);
740 return ret;
741 }
742
743 struct intel_encoder *
744 intel_ddi_get_crtc_new_encoder(struct intel_crtc_state *crtc_state)
745 {
746 struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
747 struct intel_encoder *ret = NULL;
748 struct drm_atomic_state *state;
749 struct drm_connector *connector;
750 struct drm_connector_state *connector_state;
751 int num_encoders = 0;
752 int i;
753
754 state = crtc_state->base.state;
755
756 for_each_connector_in_state(state, connector, connector_state, i) {
757 if (connector_state->crtc != crtc_state->base.crtc)
758 continue;
759
760 ret = to_intel_encoder(connector_state->best_encoder);
761 num_encoders++;
762 }
763
764 WARN(num_encoders != 1, "%d encoders on crtc for pipe %c\n", num_encoders,
765 pipe_name(crtc->pipe));
766
767 BUG_ON(ret == NULL);
768 return ret;
769 }
770
771 #define LC_FREQ 2700
772
773 static int hsw_ddi_calc_wrpll_link(struct drm_i915_private *dev_priv,
774 i915_reg_t reg)
775 {
776 int refclk = LC_FREQ;
777 int n, p, r;
778 u32 wrpll;
779
780 wrpll = I915_READ(reg);
781 switch (wrpll & WRPLL_PLL_REF_MASK) {
782 case WRPLL_PLL_SSC:
783 case WRPLL_PLL_NON_SSC:
784 /*
785 * We could calculate spread here, but our checking
786 * code only cares about 5% accuracy, and spread is a max of
787 * 0.5% downspread.
788 */
789 refclk = 135;
790 break;
791 case WRPLL_PLL_LCPLL:
792 refclk = LC_FREQ;
793 break;
794 default:
795 WARN(1, "bad wrpll refclk\n");
796 return 0;
797 }
798
799 r = wrpll & WRPLL_DIVIDER_REF_MASK;
800 p = (wrpll & WRPLL_DIVIDER_POST_MASK) >> WRPLL_DIVIDER_POST_SHIFT;
801 n = (wrpll & WRPLL_DIVIDER_FB_MASK) >> WRPLL_DIVIDER_FB_SHIFT;
802
803 /* Convert to KHz, p & r have a fixed point portion */
804 return (refclk * n * 100) / (p * r);
805 }
806
807 static int skl_calc_wrpll_link(struct drm_i915_private *dev_priv,
808 uint32_t dpll)
809 {
810 i915_reg_t cfgcr1_reg, cfgcr2_reg;
811 uint32_t cfgcr1_val, cfgcr2_val;
812 uint32_t p0, p1, p2, dco_freq;
813
814 cfgcr1_reg = DPLL_CFGCR1(dpll);
815 cfgcr2_reg = DPLL_CFGCR2(dpll);
816
817 cfgcr1_val = I915_READ(cfgcr1_reg);
818 cfgcr2_val = I915_READ(cfgcr2_reg);
819
820 p0 = cfgcr2_val & DPLL_CFGCR2_PDIV_MASK;
821 p2 = cfgcr2_val & DPLL_CFGCR2_KDIV_MASK;
822
823 if (cfgcr2_val & DPLL_CFGCR2_QDIV_MODE(1))
824 p1 = (cfgcr2_val & DPLL_CFGCR2_QDIV_RATIO_MASK) >> 8;
825 else
826 p1 = 1;
827
828
829 switch (p0) {
830 case DPLL_CFGCR2_PDIV_1:
831 p0 = 1;
832 break;
833 case DPLL_CFGCR2_PDIV_2:
834 p0 = 2;
835 break;
836 case DPLL_CFGCR2_PDIV_3:
837 p0 = 3;
838 break;
839 case DPLL_CFGCR2_PDIV_7:
840 p0 = 7;
841 break;
842 }
843
844 switch (p2) {
845 case DPLL_CFGCR2_KDIV_5:
846 p2 = 5;
847 break;
848 case DPLL_CFGCR2_KDIV_2:
849 p2 = 2;
850 break;
851 case DPLL_CFGCR2_KDIV_3:
852 p2 = 3;
853 break;
854 case DPLL_CFGCR2_KDIV_1:
855 p2 = 1;
856 break;
857 }
858
859 dco_freq = (cfgcr1_val & DPLL_CFGCR1_DCO_INTEGER_MASK) * 24 * 1000;
860
861 dco_freq += (((cfgcr1_val & DPLL_CFGCR1_DCO_FRACTION_MASK) >> 9) * 24 *
862 1000) / 0x8000;
863
864 return dco_freq / (p0 * p1 * p2 * 5);
865 }
866
867 static void ddi_dotclock_get(struct intel_crtc_state *pipe_config)
868 {
869 int dotclock;
870
871 if (pipe_config->has_pch_encoder)
872 dotclock = intel_dotclock_calculate(pipe_config->port_clock,
873 &pipe_config->fdi_m_n);
874 else if (intel_crtc_has_dp_encoder(pipe_config))
875 dotclock = intel_dotclock_calculate(pipe_config->port_clock,
876 &pipe_config->dp_m_n);
877 else if (pipe_config->has_hdmi_sink && pipe_config->pipe_bpp == 36)
878 dotclock = pipe_config->port_clock * 2 / 3;
879 else
880 dotclock = pipe_config->port_clock;
881
882 if (pipe_config->pixel_multiplier)
883 dotclock /= pipe_config->pixel_multiplier;
884
885 pipe_config->base.adjusted_mode.crtc_clock = dotclock;
886 }
887
888 static void skl_ddi_clock_get(struct intel_encoder *encoder,
889 struct intel_crtc_state *pipe_config)
890 {
891 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
892 int link_clock = 0;
893 uint32_t dpll_ctl1, dpll;
894
895 dpll = intel_get_shared_dpll_id(dev_priv, pipe_config->shared_dpll);
896
897 dpll_ctl1 = I915_READ(DPLL_CTRL1);
898
899 if (dpll_ctl1 & DPLL_CTRL1_HDMI_MODE(dpll)) {
900 link_clock = skl_calc_wrpll_link(dev_priv, dpll);
901 } else {
902 link_clock = dpll_ctl1 & DPLL_CTRL1_LINK_RATE_MASK(dpll);
903 link_clock >>= DPLL_CTRL1_LINK_RATE_SHIFT(dpll);
904
905 switch (link_clock) {
906 case DPLL_CTRL1_LINK_RATE_810:
907 link_clock = 81000;
908 break;
909 case DPLL_CTRL1_LINK_RATE_1080:
910 link_clock = 108000;
911 break;
912 case DPLL_CTRL1_LINK_RATE_1350:
913 link_clock = 135000;
914 break;
915 case DPLL_CTRL1_LINK_RATE_1620:
916 link_clock = 162000;
917 break;
918 case DPLL_CTRL1_LINK_RATE_2160:
919 link_clock = 216000;
920 break;
921 case DPLL_CTRL1_LINK_RATE_2700:
922 link_clock = 270000;
923 break;
924 default:
925 WARN(1, "Unsupported link rate\n");
926 break;
927 }
928 link_clock *= 2;
929 }
930
931 pipe_config->port_clock = link_clock;
932
933 ddi_dotclock_get(pipe_config);
934 }
935
936 static void hsw_ddi_clock_get(struct intel_encoder *encoder,
937 struct intel_crtc_state *pipe_config)
938 {
939 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
940 int link_clock = 0;
941 u32 val, pll;
942
943 val = hsw_pll_to_ddi_pll_sel(pipe_config->shared_dpll);
944 switch (val & PORT_CLK_SEL_MASK) {
945 case PORT_CLK_SEL_LCPLL_810:
946 link_clock = 81000;
947 break;
948 case PORT_CLK_SEL_LCPLL_1350:
949 link_clock = 135000;
950 break;
951 case PORT_CLK_SEL_LCPLL_2700:
952 link_clock = 270000;
953 break;
954 case PORT_CLK_SEL_WRPLL1:
955 link_clock = hsw_ddi_calc_wrpll_link(dev_priv, WRPLL_CTL(0));
956 break;
957 case PORT_CLK_SEL_WRPLL2:
958 link_clock = hsw_ddi_calc_wrpll_link(dev_priv, WRPLL_CTL(1));
959 break;
960 case PORT_CLK_SEL_SPLL:
961 pll = I915_READ(SPLL_CTL) & SPLL_PLL_FREQ_MASK;
962 if (pll == SPLL_PLL_FREQ_810MHz)
963 link_clock = 81000;
964 else if (pll == SPLL_PLL_FREQ_1350MHz)
965 link_clock = 135000;
966 else if (pll == SPLL_PLL_FREQ_2700MHz)
967 link_clock = 270000;
968 else {
969 WARN(1, "bad spll freq\n");
970 return;
971 }
972 break;
973 default:
974 WARN(1, "bad port clock sel\n");
975 return;
976 }
977
978 pipe_config->port_clock = link_clock * 2;
979
980 ddi_dotclock_get(pipe_config);
981 }
982
983 static int bxt_calc_pll_link(struct drm_i915_private *dev_priv,
984 enum intel_dpll_id dpll)
985 {
986 struct intel_shared_dpll *pll;
987 struct intel_dpll_hw_state *state;
988 struct dpll clock;
989
990 /* For DDI ports we always use a shared PLL. */
991 if (WARN_ON(dpll == DPLL_ID_PRIVATE))
992 return 0;
993
994 pll = &dev_priv->shared_dplls[dpll];
995 state = &pll->config.hw_state;
996
997 clock.m1 = 2;
998 clock.m2 = (state->pll0 & PORT_PLL_M2_MASK) << 22;
999 if (state->pll3 & PORT_PLL_M2_FRAC_ENABLE)
1000 clock.m2 |= state->pll2 & PORT_PLL_M2_FRAC_MASK;
1001 clock.n = (state->pll1 & PORT_PLL_N_MASK) >> PORT_PLL_N_SHIFT;
1002 clock.p1 = (state->ebb0 & PORT_PLL_P1_MASK) >> PORT_PLL_P1_SHIFT;
1003 clock.p2 = (state->ebb0 & PORT_PLL_P2_MASK) >> PORT_PLL_P2_SHIFT;
1004
1005 return chv_calc_dpll_params(100000, &clock);
1006 }
1007
1008 static void bxt_ddi_clock_get(struct intel_encoder *encoder,
1009 struct intel_crtc_state *pipe_config)
1010 {
1011 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
1012 enum port port = intel_ddi_get_encoder_port(encoder);
1013 uint32_t dpll = port;
1014
1015 pipe_config->port_clock = bxt_calc_pll_link(dev_priv, dpll);
1016
1017 ddi_dotclock_get(pipe_config);
1018 }
1019
1020 void intel_ddi_clock_get(struct intel_encoder *encoder,
1021 struct intel_crtc_state *pipe_config)
1022 {
1023 struct drm_device *dev = encoder->base.dev;
1024
1025 if (INTEL_INFO(dev)->gen <= 8)
1026 hsw_ddi_clock_get(encoder, pipe_config);
1027 else if (IS_SKYLAKE(dev) || IS_KABYLAKE(dev))
1028 skl_ddi_clock_get(encoder, pipe_config);
1029 else if (IS_BROXTON(dev))
1030 bxt_ddi_clock_get(encoder, pipe_config);
1031 }
1032
1033 static bool
1034 hsw_ddi_pll_select(struct intel_crtc *intel_crtc,
1035 struct intel_crtc_state *crtc_state,
1036 struct intel_encoder *intel_encoder)
1037 {
1038 struct intel_shared_dpll *pll;
1039
1040 pll = intel_get_shared_dpll(intel_crtc, crtc_state,
1041 intel_encoder);
1042 if (!pll)
1043 DRM_DEBUG_DRIVER("failed to find PLL for pipe %c\n",
1044 pipe_name(intel_crtc->pipe));
1045
1046 return pll;
1047 }
1048
1049 static bool
1050 skl_ddi_pll_select(struct intel_crtc *intel_crtc,
1051 struct intel_crtc_state *crtc_state,
1052 struct intel_encoder *intel_encoder)
1053 {
1054 struct intel_shared_dpll *pll;
1055
1056 pll = intel_get_shared_dpll(intel_crtc, crtc_state, intel_encoder);
1057 if (pll == NULL) {
1058 DRM_DEBUG_DRIVER("failed to find PLL for pipe %c\n",
1059 pipe_name(intel_crtc->pipe));
1060 return false;
1061 }
1062
1063 return true;
1064 }
1065
1066 static bool
1067 bxt_ddi_pll_select(struct intel_crtc *intel_crtc,
1068 struct intel_crtc_state *crtc_state,
1069 struct intel_encoder *intel_encoder)
1070 {
1071 return !!intel_get_shared_dpll(intel_crtc, crtc_state, intel_encoder);
1072 }
1073
1074 /*
1075 * Tries to find a *shared* PLL for the CRTC and store it in
1076 * intel_crtc->ddi_pll_sel.
1077 *
1078 * For private DPLLs, compute_config() should do the selection for us. This
1079 * function should be folded into compute_config() eventually.
1080 */
1081 bool intel_ddi_pll_select(struct intel_crtc *intel_crtc,
1082 struct intel_crtc_state *crtc_state)
1083 {
1084 struct drm_device *dev = intel_crtc->base.dev;
1085 struct intel_encoder *intel_encoder =
1086 intel_ddi_get_crtc_new_encoder(crtc_state);
1087
1088 if (IS_SKYLAKE(dev) || IS_KABYLAKE(dev))
1089 return skl_ddi_pll_select(intel_crtc, crtc_state,
1090 intel_encoder);
1091 else if (IS_BROXTON(dev))
1092 return bxt_ddi_pll_select(intel_crtc, crtc_state,
1093 intel_encoder);
1094 else
1095 return hsw_ddi_pll_select(intel_crtc, crtc_state,
1096 intel_encoder);
1097 }
1098
1099 void intel_ddi_set_pipe_settings(struct drm_crtc *crtc)
1100 {
1101 struct drm_i915_private *dev_priv = to_i915(crtc->dev);
1102 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
1103 struct intel_encoder *intel_encoder = intel_ddi_get_crtc_encoder(crtc);
1104 enum transcoder cpu_transcoder = intel_crtc->config->cpu_transcoder;
1105 int type = intel_encoder->type;
1106 uint32_t temp;
1107
1108 if (type == INTEL_OUTPUT_DP || type == INTEL_OUTPUT_EDP || type == INTEL_OUTPUT_DP_MST) {
1109 WARN_ON(transcoder_is_dsi(cpu_transcoder));
1110
1111 temp = TRANS_MSA_SYNC_CLK;
1112 switch (intel_crtc->config->pipe_bpp) {
1113 case 18:
1114 temp |= TRANS_MSA_6_BPC;
1115 break;
1116 case 24:
1117 temp |= TRANS_MSA_8_BPC;
1118 break;
1119 case 30:
1120 temp |= TRANS_MSA_10_BPC;
1121 break;
1122 case 36:
1123 temp |= TRANS_MSA_12_BPC;
1124 break;
1125 default:
1126 BUG();
1127 }
1128 I915_WRITE(TRANS_MSA_MISC(cpu_transcoder), temp);
1129 }
1130 }
1131
1132 void intel_ddi_set_vc_payload_alloc(struct drm_crtc *crtc, bool state)
1133 {
1134 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
1135 struct drm_device *dev = crtc->dev;
1136 struct drm_i915_private *dev_priv = to_i915(dev);
1137 enum transcoder cpu_transcoder = intel_crtc->config->cpu_transcoder;
1138 uint32_t temp;
1139 temp = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder));
1140 if (state == true)
1141 temp |= TRANS_DDI_DP_VC_PAYLOAD_ALLOC;
1142 else
1143 temp &= ~TRANS_DDI_DP_VC_PAYLOAD_ALLOC;
1144 I915_WRITE(TRANS_DDI_FUNC_CTL(cpu_transcoder), temp);
1145 }
1146
1147 void intel_ddi_enable_transcoder_func(struct drm_crtc *crtc)
1148 {
1149 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
1150 struct intel_encoder *intel_encoder = intel_ddi_get_crtc_encoder(crtc);
1151 struct drm_device *dev = crtc->dev;
1152 struct drm_i915_private *dev_priv = to_i915(dev);
1153 enum pipe pipe = intel_crtc->pipe;
1154 enum transcoder cpu_transcoder = intel_crtc->config->cpu_transcoder;
1155 enum port port = intel_ddi_get_encoder_port(intel_encoder);
1156 int type = intel_encoder->type;
1157 uint32_t temp;
1158
1159 /* Enable TRANS_DDI_FUNC_CTL for the pipe to work in HDMI mode */
1160 temp = TRANS_DDI_FUNC_ENABLE;
1161 temp |= TRANS_DDI_SELECT_PORT(port);
1162
1163 switch (intel_crtc->config->pipe_bpp) {
1164 case 18:
1165 temp |= TRANS_DDI_BPC_6;
1166 break;
1167 case 24:
1168 temp |= TRANS_DDI_BPC_8;
1169 break;
1170 case 30:
1171 temp |= TRANS_DDI_BPC_10;
1172 break;
1173 case 36:
1174 temp |= TRANS_DDI_BPC_12;
1175 break;
1176 default:
1177 BUG();
1178 }
1179
1180 if (intel_crtc->config->base.adjusted_mode.flags & DRM_MODE_FLAG_PVSYNC)
1181 temp |= TRANS_DDI_PVSYNC;
1182 if (intel_crtc->config->base.adjusted_mode.flags & DRM_MODE_FLAG_PHSYNC)
1183 temp |= TRANS_DDI_PHSYNC;
1184
1185 if (cpu_transcoder == TRANSCODER_EDP) {
1186 switch (pipe) {
1187 case PIPE_A:
1188 /* On Haswell, can only use the always-on power well for
1189 * eDP when not using the panel fitter, and when not
1190 * using motion blur mitigation (which we don't
1191 * support). */
1192 if (IS_HASWELL(dev) &&
1193 (intel_crtc->config->pch_pfit.enabled ||
1194 intel_crtc->config->pch_pfit.force_thru))
1195 temp |= TRANS_DDI_EDP_INPUT_A_ONOFF;
1196 else
1197 temp |= TRANS_DDI_EDP_INPUT_A_ON;
1198 break;
1199 case PIPE_B:
1200 temp |= TRANS_DDI_EDP_INPUT_B_ONOFF;
1201 break;
1202 case PIPE_C:
1203 temp |= TRANS_DDI_EDP_INPUT_C_ONOFF;
1204 break;
1205 default:
1206 BUG();
1207 break;
1208 }
1209 }
1210
1211 if (type == INTEL_OUTPUT_HDMI) {
1212 if (intel_crtc->config->has_hdmi_sink)
1213 temp |= TRANS_DDI_MODE_SELECT_HDMI;
1214 else
1215 temp |= TRANS_DDI_MODE_SELECT_DVI;
1216 } else if (type == INTEL_OUTPUT_ANALOG) {
1217 temp |= TRANS_DDI_MODE_SELECT_FDI;
1218 temp |= (intel_crtc->config->fdi_lanes - 1) << 1;
1219 } else if (type == INTEL_OUTPUT_DP ||
1220 type == INTEL_OUTPUT_EDP) {
1221 temp |= TRANS_DDI_MODE_SELECT_DP_SST;
1222 temp |= DDI_PORT_WIDTH(intel_crtc->config->lane_count);
1223 } else if (type == INTEL_OUTPUT_DP_MST) {
1224 temp |= TRANS_DDI_MODE_SELECT_DP_MST;
1225 temp |= DDI_PORT_WIDTH(intel_crtc->config->lane_count);
1226 } else {
1227 WARN(1, "Invalid encoder type %d for pipe %c\n",
1228 intel_encoder->type, pipe_name(pipe));
1229 }
1230
1231 I915_WRITE(TRANS_DDI_FUNC_CTL(cpu_transcoder), temp);
1232 }
1233
1234 void intel_ddi_disable_transcoder_func(struct drm_i915_private *dev_priv,
1235 enum transcoder cpu_transcoder)
1236 {
1237 i915_reg_t reg = TRANS_DDI_FUNC_CTL(cpu_transcoder);
1238 uint32_t val = I915_READ(reg);
1239
1240 val &= ~(TRANS_DDI_FUNC_ENABLE | TRANS_DDI_PORT_MASK | TRANS_DDI_DP_VC_PAYLOAD_ALLOC);
1241 val |= TRANS_DDI_PORT_NONE;
1242 I915_WRITE(reg, val);
1243 }
1244
1245 bool intel_ddi_connector_get_hw_state(struct intel_connector *intel_connector)
1246 {
1247 struct drm_device *dev = intel_connector->base.dev;
1248 struct drm_i915_private *dev_priv = to_i915(dev);
1249 struct intel_encoder *intel_encoder = intel_connector->encoder;
1250 int type = intel_connector->base.connector_type;
1251 enum port port = intel_ddi_get_encoder_port(intel_encoder);
1252 enum pipe pipe = 0;
1253 enum transcoder cpu_transcoder;
1254 enum intel_display_power_domain power_domain;
1255 uint32_t tmp;
1256 bool ret;
1257
1258 power_domain = intel_display_port_power_domain(intel_encoder);
1259 if (!intel_display_power_get_if_enabled(dev_priv, power_domain))
1260 return false;
1261
1262 if (!intel_encoder->get_hw_state(intel_encoder, &pipe)) {
1263 ret = false;
1264 goto out;
1265 }
1266
1267 if (port == PORT_A)
1268 cpu_transcoder = TRANSCODER_EDP;
1269 else
1270 cpu_transcoder = (enum transcoder) pipe;
1271
1272 tmp = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder));
1273
1274 switch (tmp & TRANS_DDI_MODE_SELECT_MASK) {
1275 case TRANS_DDI_MODE_SELECT_HDMI:
1276 case TRANS_DDI_MODE_SELECT_DVI:
1277 ret = type == DRM_MODE_CONNECTOR_HDMIA;
1278 break;
1279
1280 case TRANS_DDI_MODE_SELECT_DP_SST:
1281 ret = type == DRM_MODE_CONNECTOR_eDP ||
1282 type == DRM_MODE_CONNECTOR_DisplayPort;
1283 break;
1284
1285 case TRANS_DDI_MODE_SELECT_DP_MST:
1286 /* if the transcoder is in MST state then
1287 * connector isn't connected */
1288 ret = false;
1289 break;
1290
1291 case TRANS_DDI_MODE_SELECT_FDI:
1292 ret = type == DRM_MODE_CONNECTOR_VGA;
1293 break;
1294
1295 default:
1296 ret = false;
1297 break;
1298 }
1299
1300 out:
1301 intel_display_power_put(dev_priv, power_domain);
1302
1303 return ret;
1304 }
1305
1306 bool intel_ddi_get_hw_state(struct intel_encoder *encoder,
1307 enum pipe *pipe)
1308 {
1309 struct drm_device *dev = encoder->base.dev;
1310 struct drm_i915_private *dev_priv = to_i915(dev);
1311 enum port port = intel_ddi_get_encoder_port(encoder);
1312 enum intel_display_power_domain power_domain;
1313 u32 tmp;
1314 int i;
1315 bool ret;
1316
1317 power_domain = intel_display_port_power_domain(encoder);
1318 if (!intel_display_power_get_if_enabled(dev_priv, power_domain))
1319 return false;
1320
1321 ret = false;
1322
1323 tmp = I915_READ(DDI_BUF_CTL(port));
1324
1325 if (!(tmp & DDI_BUF_CTL_ENABLE))
1326 goto out;
1327
1328 if (port == PORT_A) {
1329 tmp = I915_READ(TRANS_DDI_FUNC_CTL(TRANSCODER_EDP));
1330
1331 switch (tmp & TRANS_DDI_EDP_INPUT_MASK) {
1332 case TRANS_DDI_EDP_INPUT_A_ON:
1333 case TRANS_DDI_EDP_INPUT_A_ONOFF:
1334 *pipe = PIPE_A;
1335 break;
1336 case TRANS_DDI_EDP_INPUT_B_ONOFF:
1337 *pipe = PIPE_B;
1338 break;
1339 case TRANS_DDI_EDP_INPUT_C_ONOFF:
1340 *pipe = PIPE_C;
1341 break;
1342 }
1343
1344 ret = true;
1345
1346 goto out;
1347 }
1348
1349 for (i = TRANSCODER_A; i <= TRANSCODER_C; i++) {
1350 tmp = I915_READ(TRANS_DDI_FUNC_CTL(i));
1351
1352 if ((tmp & TRANS_DDI_PORT_MASK) == TRANS_DDI_SELECT_PORT(port)) {
1353 if ((tmp & TRANS_DDI_MODE_SELECT_MASK) ==
1354 TRANS_DDI_MODE_SELECT_DP_MST)
1355 goto out;
1356
1357 *pipe = i;
1358 ret = true;
1359
1360 goto out;
1361 }
1362 }
1363
1364 DRM_DEBUG_KMS("No pipe for ddi port %c found\n", port_name(port));
1365
1366 out:
1367 if (ret && IS_BROXTON(dev_priv)) {
1368 tmp = I915_READ(BXT_PHY_CTL(port));
1369 if ((tmp & (BXT_PHY_LANE_POWERDOWN_ACK |
1370 BXT_PHY_LANE_ENABLED)) != BXT_PHY_LANE_ENABLED)
1371 DRM_ERROR("Port %c enabled but PHY powered down? "
1372 "(PHY_CTL %08x)\n", port_name(port), tmp);
1373 }
1374
1375 intel_display_power_put(dev_priv, power_domain);
1376
1377 return ret;
1378 }
1379
1380 void intel_ddi_enable_pipe_clock(struct intel_crtc *intel_crtc)
1381 {
1382 struct drm_crtc *crtc = &intel_crtc->base;
1383 struct drm_device *dev = crtc->dev;
1384 struct drm_i915_private *dev_priv = to_i915(dev);
1385 struct intel_encoder *intel_encoder = intel_ddi_get_crtc_encoder(crtc);
1386 enum port port = intel_ddi_get_encoder_port(intel_encoder);
1387 enum transcoder cpu_transcoder = intel_crtc->config->cpu_transcoder;
1388
1389 if (cpu_transcoder != TRANSCODER_EDP)
1390 I915_WRITE(TRANS_CLK_SEL(cpu_transcoder),
1391 TRANS_CLK_SEL_PORT(port));
1392 }
1393
1394 void intel_ddi_disable_pipe_clock(struct intel_crtc *intel_crtc)
1395 {
1396 struct drm_i915_private *dev_priv = to_i915(intel_crtc->base.dev);
1397 enum transcoder cpu_transcoder = intel_crtc->config->cpu_transcoder;
1398
1399 if (cpu_transcoder != TRANSCODER_EDP)
1400 I915_WRITE(TRANS_CLK_SEL(cpu_transcoder),
1401 TRANS_CLK_SEL_DISABLED);
1402 }
1403
1404 static void _skl_ddi_set_iboost(struct drm_i915_private *dev_priv,
1405 enum port port, uint8_t iboost)
1406 {
1407 u32 tmp;
1408
1409 tmp = I915_READ(DISPIO_CR_TX_BMU_CR0);
1410 tmp &= ~(BALANCE_LEG_MASK(port) | BALANCE_LEG_DISABLE(port));
1411 if (iboost)
1412 tmp |= iboost << BALANCE_LEG_SHIFT(port);
1413 else
1414 tmp |= BALANCE_LEG_DISABLE(port);
1415 I915_WRITE(DISPIO_CR_TX_BMU_CR0, tmp);
1416 }
1417
1418 static void skl_ddi_set_iboost(struct intel_encoder *encoder, u32 level)
1419 {
1420 struct intel_digital_port *intel_dig_port = enc_to_dig_port(&encoder->base);
1421 struct drm_i915_private *dev_priv = to_i915(intel_dig_port->base.base.dev);
1422 enum port port = intel_dig_port->port;
1423 int type = encoder->type;
1424 const struct ddi_buf_trans *ddi_translations;
1425 uint8_t iboost;
1426 uint8_t dp_iboost, hdmi_iboost;
1427 int n_entries;
1428
1429 /* VBT may override standard boost values */
1430 dp_iboost = dev_priv->vbt.ddi_port_info[port].dp_boost_level;
1431 hdmi_iboost = dev_priv->vbt.ddi_port_info[port].hdmi_boost_level;
1432
1433 if (type == INTEL_OUTPUT_DP) {
1434 if (dp_iboost) {
1435 iboost = dp_iboost;
1436 } else {
1437 ddi_translations = skl_get_buf_trans_dp(dev_priv, &n_entries);
1438 iboost = ddi_translations[level].i_boost;
1439 }
1440 } else if (type == INTEL_OUTPUT_EDP) {
1441 if (dp_iboost) {
1442 iboost = dp_iboost;
1443 } else {
1444 ddi_translations = skl_get_buf_trans_edp(dev_priv, &n_entries);
1445
1446 if (WARN_ON(port != PORT_A &&
1447 port != PORT_E && n_entries > 9))
1448 n_entries = 9;
1449
1450 iboost = ddi_translations[level].i_boost;
1451 }
1452 } else if (type == INTEL_OUTPUT_HDMI) {
1453 if (hdmi_iboost) {
1454 iboost = hdmi_iboost;
1455 } else {
1456 ddi_translations = skl_get_buf_trans_hdmi(dev_priv, &n_entries);
1457 iboost = ddi_translations[level].i_boost;
1458 }
1459 } else {
1460 return;
1461 }
1462
1463 /* Make sure that the requested I_boost is valid */
1464 if (iboost && iboost != 0x1 && iboost != 0x3 && iboost != 0x7) {
1465 DRM_ERROR("Invalid I_boost value %u\n", iboost);
1466 return;
1467 }
1468
1469 _skl_ddi_set_iboost(dev_priv, port, iboost);
1470
1471 if (port == PORT_A && intel_dig_port->max_lanes == 4)
1472 _skl_ddi_set_iboost(dev_priv, PORT_E, iboost);
1473 }
1474
1475 static void bxt_ddi_vswing_sequence(struct drm_i915_private *dev_priv,
1476 u32 level, enum port port, int type)
1477 {
1478 const struct bxt_ddi_buf_trans *ddi_translations;
1479 u32 n_entries, i;
1480 uint32_t val;
1481
1482 if (type == INTEL_OUTPUT_EDP && dev_priv->vbt.edp.low_vswing) {
1483 n_entries = ARRAY_SIZE(bxt_ddi_translations_edp);
1484 ddi_translations = bxt_ddi_translations_edp;
1485 } else if (type == INTEL_OUTPUT_DP
1486 || type == INTEL_OUTPUT_EDP) {
1487 n_entries = ARRAY_SIZE(bxt_ddi_translations_dp);
1488 ddi_translations = bxt_ddi_translations_dp;
1489 } else if (type == INTEL_OUTPUT_HDMI) {
1490 n_entries = ARRAY_SIZE(bxt_ddi_translations_hdmi);
1491 ddi_translations = bxt_ddi_translations_hdmi;
1492 } else {
1493 DRM_DEBUG_KMS("Vswing programming not done for encoder %d\n",
1494 type);
1495 return;
1496 }
1497
1498 /* Check if default value has to be used */
1499 if (level >= n_entries ||
1500 (type == INTEL_OUTPUT_HDMI && level == HDMI_LEVEL_SHIFT_UNKNOWN)) {
1501 for (i = 0; i < n_entries; i++) {
1502 if (ddi_translations[i].default_index) {
1503 level = i;
1504 break;
1505 }
1506 }
1507 }
1508
1509 /*
1510 * While we write to the group register to program all lanes at once we
1511 * can read only lane registers and we pick lanes 0/1 for that.
1512 */
1513 val = I915_READ(BXT_PORT_PCS_DW10_LN01(port));
1514 val &= ~(TX2_SWING_CALC_INIT | TX1_SWING_CALC_INIT);
1515 I915_WRITE(BXT_PORT_PCS_DW10_GRP(port), val);
1516
1517 val = I915_READ(BXT_PORT_TX_DW2_LN0(port));
1518 val &= ~(MARGIN_000 | UNIQ_TRANS_SCALE);
1519 val |= ddi_translations[level].margin << MARGIN_000_SHIFT |
1520 ddi_translations[level].scale << UNIQ_TRANS_SCALE_SHIFT;
1521 I915_WRITE(BXT_PORT_TX_DW2_GRP(port), val);
1522
1523 val = I915_READ(BXT_PORT_TX_DW3_LN0(port));
1524 val &= ~SCALE_DCOMP_METHOD;
1525 if (ddi_translations[level].enable)
1526 val |= SCALE_DCOMP_METHOD;
1527
1528 if ((val & UNIQUE_TRANGE_EN_METHOD) && !(val & SCALE_DCOMP_METHOD))
1529 DRM_ERROR("Disabled scaling while ouniqetrangenmethod was set");
1530
1531 I915_WRITE(BXT_PORT_TX_DW3_GRP(port), val);
1532
1533 val = I915_READ(BXT_PORT_TX_DW4_LN0(port));
1534 val &= ~DE_EMPHASIS;
1535 val |= ddi_translations[level].deemphasis << DEEMPH_SHIFT;
1536 I915_WRITE(BXT_PORT_TX_DW4_GRP(port), val);
1537
1538 val = I915_READ(BXT_PORT_PCS_DW10_LN01(port));
1539 val |= TX2_SWING_CALC_INIT | TX1_SWING_CALC_INIT;
1540 I915_WRITE(BXT_PORT_PCS_DW10_GRP(port), val);
1541 }
1542
1543 static uint32_t translate_signal_level(int signal_levels)
1544 {
1545 uint32_t level;
1546
1547 switch (signal_levels) {
1548 default:
1549 DRM_DEBUG_KMS("Unsupported voltage swing/pre-emphasis level: 0x%x\n",
1550 signal_levels);
1551 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_0:
1552 level = 0;
1553 break;
1554 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_1:
1555 level = 1;
1556 break;
1557 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_2:
1558 level = 2;
1559 break;
1560 case DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_3:
1561 level = 3;
1562 break;
1563
1564 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1 | DP_TRAIN_PRE_EMPH_LEVEL_0:
1565 level = 4;
1566 break;
1567 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1 | DP_TRAIN_PRE_EMPH_LEVEL_1:
1568 level = 5;
1569 break;
1570 case DP_TRAIN_VOLTAGE_SWING_LEVEL_1 | DP_TRAIN_PRE_EMPH_LEVEL_2:
1571 level = 6;
1572 break;
1573
1574 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2 | DP_TRAIN_PRE_EMPH_LEVEL_0:
1575 level = 7;
1576 break;
1577 case DP_TRAIN_VOLTAGE_SWING_LEVEL_2 | DP_TRAIN_PRE_EMPH_LEVEL_1:
1578 level = 8;
1579 break;
1580
1581 case DP_TRAIN_VOLTAGE_SWING_LEVEL_3 | DP_TRAIN_PRE_EMPH_LEVEL_0:
1582 level = 9;
1583 break;
1584 }
1585
1586 return level;
1587 }
1588
1589 uint32_t ddi_signal_levels(struct intel_dp *intel_dp)
1590 {
1591 struct intel_digital_port *dport = dp_to_dig_port(intel_dp);
1592 struct drm_i915_private *dev_priv = to_i915(dport->base.base.dev);
1593 struct intel_encoder *encoder = &dport->base;
1594 uint8_t train_set = intel_dp->train_set[0];
1595 int signal_levels = train_set & (DP_TRAIN_VOLTAGE_SWING_MASK |
1596 DP_TRAIN_PRE_EMPHASIS_MASK);
1597 enum port port = dport->port;
1598 uint32_t level;
1599
1600 level = translate_signal_level(signal_levels);
1601
1602 if (IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv))
1603 skl_ddi_set_iboost(encoder, level);
1604 else if (IS_BROXTON(dev_priv))
1605 bxt_ddi_vswing_sequence(dev_priv, level, port, encoder->type);
1606
1607 return DDI_BUF_TRANS_SELECT(level);
1608 }
1609
1610 void intel_ddi_clk_select(struct intel_encoder *encoder,
1611 struct intel_shared_dpll *pll)
1612 {
1613 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
1614 enum port port = intel_ddi_get_encoder_port(encoder);
1615
1616 if (WARN_ON(!pll))
1617 return;
1618
1619 if (IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv)) {
1620 uint32_t val;
1621
1622 /* DDI -> PLL mapping */
1623 val = I915_READ(DPLL_CTRL2);
1624
1625 val &= ~(DPLL_CTRL2_DDI_CLK_OFF(port) |
1626 DPLL_CTRL2_DDI_CLK_SEL_MASK(port));
1627 val |= (DPLL_CTRL2_DDI_CLK_SEL(pll->id, port) |
1628 DPLL_CTRL2_DDI_SEL_OVERRIDE(port));
1629
1630 I915_WRITE(DPLL_CTRL2, val);
1631
1632 } else if (INTEL_INFO(dev_priv)->gen < 9) {
1633 I915_WRITE(PORT_CLK_SEL(port), hsw_pll_to_ddi_pll_sel(pll));
1634 }
1635 }
1636
1637 static void intel_ddi_pre_enable_dp(struct intel_encoder *encoder,
1638 int link_rate, uint32_t lane_count,
1639 struct intel_shared_dpll *pll,
1640 bool link_mst)
1641 {
1642 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
1643 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
1644 enum port port = intel_ddi_get_encoder_port(encoder);
1645
1646 intel_dp_set_link_params(intel_dp, link_rate, lane_count,
1647 link_mst);
1648 if (encoder->type == INTEL_OUTPUT_EDP)
1649 intel_edp_panel_on(intel_dp);
1650
1651 intel_ddi_clk_select(encoder, pll);
1652 intel_prepare_dp_ddi_buffers(encoder);
1653 intel_ddi_init_dp_buf_reg(encoder);
1654 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
1655 intel_dp_start_link_train(intel_dp);
1656 if (port != PORT_A || INTEL_GEN(dev_priv) >= 9)
1657 intel_dp_stop_link_train(intel_dp);
1658 }
1659
1660 static void intel_ddi_pre_enable_hdmi(struct intel_encoder *encoder,
1661 bool has_hdmi_sink,
1662 struct drm_display_mode *adjusted_mode,
1663 struct intel_shared_dpll *pll)
1664 {
1665 struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(&encoder->base);
1666 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
1667 struct drm_encoder *drm_encoder = &encoder->base;
1668 enum port port = intel_ddi_get_encoder_port(encoder);
1669 int level = intel_ddi_hdmi_level(dev_priv, port);
1670
1671 intel_dp_dual_mode_set_tmds_output(intel_hdmi, true);
1672 intel_ddi_clk_select(encoder, pll);
1673 intel_prepare_hdmi_ddi_buffers(encoder);
1674 if (IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv))
1675 skl_ddi_set_iboost(encoder, level);
1676 else if (IS_BROXTON(dev_priv))
1677 bxt_ddi_vswing_sequence(dev_priv, level, port,
1678 INTEL_OUTPUT_HDMI);
1679
1680 intel_hdmi->set_infoframes(drm_encoder,
1681 has_hdmi_sink,
1682 adjusted_mode);
1683 }
1684
1685 static void intel_ddi_pre_enable(struct intel_encoder *intel_encoder,
1686 struct intel_crtc_state *pipe_config,
1687 struct drm_connector_state *conn_state)
1688 {
1689 struct drm_encoder *encoder = &intel_encoder->base;
1690 struct intel_crtc *crtc = to_intel_crtc(encoder->crtc);
1691 int type = intel_encoder->type;
1692
1693 if (type == INTEL_OUTPUT_DP || type == INTEL_OUTPUT_EDP) {
1694 intel_ddi_pre_enable_dp(intel_encoder,
1695 crtc->config->port_clock,
1696 crtc->config->lane_count,
1697 crtc->config->shared_dpll,
1698 intel_crtc_has_type(crtc->config,
1699 INTEL_OUTPUT_DP_MST));
1700 }
1701 if (type == INTEL_OUTPUT_HDMI) {
1702 intel_ddi_pre_enable_hdmi(intel_encoder,
1703 crtc->config->has_hdmi_sink,
1704 &crtc->config->base.adjusted_mode,
1705 crtc->config->shared_dpll);
1706 }
1707 }
1708
1709 static void intel_ddi_post_disable(struct intel_encoder *intel_encoder,
1710 struct intel_crtc_state *old_crtc_state,
1711 struct drm_connector_state *old_conn_state)
1712 {
1713 struct drm_encoder *encoder = &intel_encoder->base;
1714 struct drm_device *dev = encoder->dev;
1715 struct drm_i915_private *dev_priv = to_i915(dev);
1716 enum port port = intel_ddi_get_encoder_port(intel_encoder);
1717 int type = intel_encoder->type;
1718 uint32_t val;
1719 bool wait = false;
1720
1721 /* old_crtc_state and old_conn_state are NULL when called from DP_MST */
1722
1723 val = I915_READ(DDI_BUF_CTL(port));
1724 if (val & DDI_BUF_CTL_ENABLE) {
1725 val &= ~DDI_BUF_CTL_ENABLE;
1726 I915_WRITE(DDI_BUF_CTL(port), val);
1727 wait = true;
1728 }
1729
1730 val = I915_READ(DP_TP_CTL(port));
1731 val &= ~(DP_TP_CTL_ENABLE | DP_TP_CTL_LINK_TRAIN_MASK);
1732 val |= DP_TP_CTL_LINK_TRAIN_PAT1;
1733 I915_WRITE(DP_TP_CTL(port), val);
1734
1735 if (wait)
1736 intel_wait_ddi_buf_idle(dev_priv, port);
1737
1738 if (type == INTEL_OUTPUT_DP || type == INTEL_OUTPUT_EDP) {
1739 struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
1740 intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF);
1741 intel_edp_panel_vdd_on(intel_dp);
1742 intel_edp_panel_off(intel_dp);
1743 }
1744
1745 if (IS_SKYLAKE(dev) || IS_KABYLAKE(dev))
1746 I915_WRITE(DPLL_CTRL2, (I915_READ(DPLL_CTRL2) |
1747 DPLL_CTRL2_DDI_CLK_OFF(port)));
1748 else if (INTEL_INFO(dev)->gen < 9)
1749 I915_WRITE(PORT_CLK_SEL(port), PORT_CLK_SEL_NONE);
1750
1751 if (type == INTEL_OUTPUT_HDMI) {
1752 struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
1753
1754 intel_dp_dual_mode_set_tmds_output(intel_hdmi, false);
1755 }
1756 }
1757
1758 void intel_ddi_fdi_post_disable(struct intel_encoder *intel_encoder,
1759 struct intel_crtc_state *old_crtc_state,
1760 struct drm_connector_state *old_conn_state)
1761 {
1762 struct drm_i915_private *dev_priv = to_i915(intel_encoder->base.dev);
1763 uint32_t val;
1764
1765 /*
1766 * Bspec lists this as both step 13 (before DDI_BUF_CTL disable)
1767 * and step 18 (after clearing PORT_CLK_SEL). Based on a BUN,
1768 * step 13 is the correct place for it. Step 18 is where it was
1769 * originally before the BUN.
1770 */
1771 val = I915_READ(FDI_RX_CTL(PIPE_A));
1772 val &= ~FDI_RX_ENABLE;
1773 I915_WRITE(FDI_RX_CTL(PIPE_A), val);
1774
1775 intel_ddi_post_disable(intel_encoder, old_crtc_state, old_conn_state);
1776
1777 val = I915_READ(FDI_RX_MISC(PIPE_A));
1778 val &= ~(FDI_RX_PWRDN_LANE1_MASK | FDI_RX_PWRDN_LANE0_MASK);
1779 val |= FDI_RX_PWRDN_LANE1_VAL(2) | FDI_RX_PWRDN_LANE0_VAL(2);
1780 I915_WRITE(FDI_RX_MISC(PIPE_A), val);
1781
1782 val = I915_READ(FDI_RX_CTL(PIPE_A));
1783 val &= ~FDI_PCDCLK;
1784 I915_WRITE(FDI_RX_CTL(PIPE_A), val);
1785
1786 val = I915_READ(FDI_RX_CTL(PIPE_A));
1787 val &= ~FDI_RX_PLL_ENABLE;
1788 I915_WRITE(FDI_RX_CTL(PIPE_A), val);
1789 }
1790
1791 static void intel_enable_ddi(struct intel_encoder *intel_encoder,
1792 struct intel_crtc_state *pipe_config,
1793 struct drm_connector_state *conn_state)
1794 {
1795 struct drm_encoder *encoder = &intel_encoder->base;
1796 struct drm_crtc *crtc = encoder->crtc;
1797 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
1798 struct drm_device *dev = encoder->dev;
1799 struct drm_i915_private *dev_priv = to_i915(dev);
1800 enum port port = intel_ddi_get_encoder_port(intel_encoder);
1801 int type = intel_encoder->type;
1802
1803 if (type == INTEL_OUTPUT_HDMI) {
1804 struct intel_digital_port *intel_dig_port =
1805 enc_to_dig_port(encoder);
1806
1807 /* In HDMI/DVI mode, the port width, and swing/emphasis values
1808 * are ignored so nothing special needs to be done besides
1809 * enabling the port.
1810 */
1811 I915_WRITE(DDI_BUF_CTL(port),
1812 intel_dig_port->saved_port_bits |
1813 DDI_BUF_CTL_ENABLE);
1814 } else if (type == INTEL_OUTPUT_EDP) {
1815 struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
1816
1817 if (port == PORT_A && INTEL_INFO(dev)->gen < 9)
1818 intel_dp_stop_link_train(intel_dp);
1819
1820 intel_edp_backlight_on(intel_dp);
1821 intel_psr_enable(intel_dp);
1822 intel_edp_drrs_enable(intel_dp, pipe_config);
1823 }
1824
1825 if (intel_crtc->config->has_audio) {
1826 intel_display_power_get(dev_priv, POWER_DOMAIN_AUDIO);
1827 intel_audio_codec_enable(intel_encoder);
1828 }
1829 }
1830
1831 static void intel_disable_ddi(struct intel_encoder *intel_encoder,
1832 struct intel_crtc_state *old_crtc_state,
1833 struct drm_connector_state *old_conn_state)
1834 {
1835 struct drm_encoder *encoder = &intel_encoder->base;
1836 struct drm_crtc *crtc = encoder->crtc;
1837 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
1838 int type = intel_encoder->type;
1839 struct drm_device *dev = encoder->dev;
1840 struct drm_i915_private *dev_priv = to_i915(dev);
1841
1842 if (intel_crtc->config->has_audio) {
1843 intel_audio_codec_disable(intel_encoder);
1844 intel_display_power_put(dev_priv, POWER_DOMAIN_AUDIO);
1845 }
1846
1847 if (type == INTEL_OUTPUT_EDP) {
1848 struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
1849
1850 intel_edp_drrs_disable(intel_dp, old_crtc_state);
1851 intel_psr_disable(intel_dp);
1852 intel_edp_backlight_off(intel_dp);
1853 }
1854 }
1855
1856 bool bxt_ddi_phy_is_enabled(struct drm_i915_private *dev_priv,
1857 enum dpio_phy phy)
1858 {
1859 enum port port;
1860
1861 if (!(I915_READ(BXT_P_CR_GT_DISP_PWRON) & GT_DISPLAY_POWER_ON(phy)))
1862 return false;
1863
1864 if ((I915_READ(BXT_PORT_CL1CM_DW0(phy)) &
1865 (PHY_POWER_GOOD | PHY_RESERVED)) != PHY_POWER_GOOD) {
1866 DRM_DEBUG_DRIVER("DDI PHY %d powered, but power hasn't settled\n",
1867 phy);
1868
1869 return false;
1870 }
1871
1872 if (phy == DPIO_PHY1 &&
1873 !(I915_READ(BXT_PORT_REF_DW3(DPIO_PHY1)) & GRC_DONE)) {
1874 DRM_DEBUG_DRIVER("DDI PHY 1 powered, but GRC isn't done\n");
1875
1876 return false;
1877 }
1878
1879 if (!(I915_READ(BXT_PHY_CTL_FAMILY(phy)) & COMMON_RESET_DIS)) {
1880 DRM_DEBUG_DRIVER("DDI PHY %d powered, but still in reset\n",
1881 phy);
1882
1883 return false;
1884 }
1885
1886 for_each_port_masked(port,
1887 phy == DPIO_PHY0 ? BIT(PORT_B) | BIT(PORT_C) :
1888 BIT(PORT_A)) {
1889 u32 tmp = I915_READ(BXT_PHY_CTL(port));
1890
1891 if (tmp & BXT_PHY_CMNLANE_POWERDOWN_ACK) {
1892 DRM_DEBUG_DRIVER("DDI PHY %d powered, but common lane "
1893 "for port %c powered down "
1894 "(PHY_CTL %08x)\n",
1895 phy, port_name(port), tmp);
1896
1897 return false;
1898 }
1899 }
1900
1901 return true;
1902 }
1903
1904 static u32 bxt_get_grc(struct drm_i915_private *dev_priv, enum dpio_phy phy)
1905 {
1906 u32 val = I915_READ(BXT_PORT_REF_DW6(phy));
1907
1908 return (val & GRC_CODE_MASK) >> GRC_CODE_SHIFT;
1909 }
1910
1911 static void bxt_phy_wait_grc_done(struct drm_i915_private *dev_priv,
1912 enum dpio_phy phy)
1913 {
1914 if (intel_wait_for_register(dev_priv,
1915 BXT_PORT_REF_DW3(phy),
1916 GRC_DONE, GRC_DONE,
1917 10))
1918 DRM_ERROR("timeout waiting for PHY%d GRC\n", phy);
1919 }
1920
1921 void bxt_ddi_phy_init(struct drm_i915_private *dev_priv, enum dpio_phy phy)
1922 {
1923 u32 val;
1924
1925 if (bxt_ddi_phy_is_enabled(dev_priv, phy)) {
1926 /* Still read out the GRC value for state verification */
1927 if (phy == DPIO_PHY0)
1928 dev_priv->bxt_phy_grc = bxt_get_grc(dev_priv, phy);
1929
1930 if (bxt_ddi_phy_verify_state(dev_priv, phy)) {
1931 DRM_DEBUG_DRIVER("DDI PHY %d already enabled, "
1932 "won't reprogram it\n", phy);
1933
1934 return;
1935 }
1936
1937 DRM_DEBUG_DRIVER("DDI PHY %d enabled with invalid state, "
1938 "force reprogramming it\n", phy);
1939 }
1940
1941 val = I915_READ(BXT_P_CR_GT_DISP_PWRON);
1942 val |= GT_DISPLAY_POWER_ON(phy);
1943 I915_WRITE(BXT_P_CR_GT_DISP_PWRON, val);
1944
1945 /*
1946 * The PHY registers start out inaccessible and respond to reads with
1947 * all 1s. Eventually they become accessible as they power up, then
1948 * the reserved bit will give the default 0. Poll on the reserved bit
1949 * becoming 0 to find when the PHY is accessible.
1950 * HW team confirmed that the time to reach phypowergood status is
1951 * anywhere between 50 us and 100us.
1952 */
1953 if (wait_for_us(((I915_READ(BXT_PORT_CL1CM_DW0(phy)) &
1954 (PHY_RESERVED | PHY_POWER_GOOD)) == PHY_POWER_GOOD), 100)) {
1955 DRM_ERROR("timeout during PHY%d power on\n", phy);
1956 }
1957
1958 /* Program PLL Rcomp code offset */
1959 val = I915_READ(BXT_PORT_CL1CM_DW9(phy));
1960 val &= ~IREF0RC_OFFSET_MASK;
1961 val |= 0xE4 << IREF0RC_OFFSET_SHIFT;
1962 I915_WRITE(BXT_PORT_CL1CM_DW9(phy), val);
1963
1964 val = I915_READ(BXT_PORT_CL1CM_DW10(phy));
1965 val &= ~IREF1RC_OFFSET_MASK;
1966 val |= 0xE4 << IREF1RC_OFFSET_SHIFT;
1967 I915_WRITE(BXT_PORT_CL1CM_DW10(phy), val);
1968
1969 /* Program power gating */
1970 val = I915_READ(BXT_PORT_CL1CM_DW28(phy));
1971 val |= OCL1_POWER_DOWN_EN | DW28_OLDO_DYN_PWR_DOWN_EN |
1972 SUS_CLK_CONFIG;
1973 I915_WRITE(BXT_PORT_CL1CM_DW28(phy), val);
1974
1975 if (phy == DPIO_PHY0) {
1976 val = I915_READ(BXT_PORT_CL2CM_DW6_BC);
1977 val |= DW6_OLDO_DYN_PWR_DOWN_EN;
1978 I915_WRITE(BXT_PORT_CL2CM_DW6_BC, val);
1979 }
1980
1981 val = I915_READ(BXT_PORT_CL1CM_DW30(phy));
1982 val &= ~OCL2_LDOFUSE_PWR_DIS;
1983 /*
1984 * On PHY1 disable power on the second channel, since no port is
1985 * connected there. On PHY0 both channels have a port, so leave it
1986 * enabled.
1987 * TODO: port C is only connected on BXT-P, so on BXT0/1 we should
1988 * power down the second channel on PHY0 as well.
1989 *
1990 * FIXME: Clarify programming of the following, the register is
1991 * read-only with bit 6 fixed at 0 at least in stepping A.
1992 */
1993 if (phy == DPIO_PHY1)
1994 val |= OCL2_LDOFUSE_PWR_DIS;
1995 I915_WRITE(BXT_PORT_CL1CM_DW30(phy), val);
1996
1997 if (phy == DPIO_PHY0) {
1998 uint32_t grc_code;
1999 /*
2000 * PHY0 isn't connected to an RCOMP resistor so copy over
2001 * the corresponding calibrated value from PHY1, and disable
2002 * the automatic calibration on PHY0.
2003 */
2004 val = dev_priv->bxt_phy_grc = bxt_get_grc(dev_priv, DPIO_PHY1);
2005 grc_code = val << GRC_CODE_FAST_SHIFT |
2006 val << GRC_CODE_SLOW_SHIFT |
2007 val;
2008 I915_WRITE(BXT_PORT_REF_DW6(DPIO_PHY0), grc_code);
2009
2010 val = I915_READ(BXT_PORT_REF_DW8(DPIO_PHY0));
2011 val |= GRC_DIS | GRC_RDY_OVRD;
2012 I915_WRITE(BXT_PORT_REF_DW8(DPIO_PHY0), val);
2013 }
2014
2015 val = I915_READ(BXT_PHY_CTL_FAMILY(phy));
2016 val |= COMMON_RESET_DIS;
2017 I915_WRITE(BXT_PHY_CTL_FAMILY(phy), val);
2018
2019 if (phy == DPIO_PHY1)
2020 bxt_phy_wait_grc_done(dev_priv, DPIO_PHY1);
2021 }
2022
2023 void bxt_ddi_phy_uninit(struct drm_i915_private *dev_priv, enum dpio_phy phy)
2024 {
2025 uint32_t val;
2026
2027 val = I915_READ(BXT_PHY_CTL_FAMILY(phy));
2028 val &= ~COMMON_RESET_DIS;
2029 I915_WRITE(BXT_PHY_CTL_FAMILY(phy), val);
2030
2031 val = I915_READ(BXT_P_CR_GT_DISP_PWRON);
2032 val &= ~GT_DISPLAY_POWER_ON(phy);
2033 I915_WRITE(BXT_P_CR_GT_DISP_PWRON, val);
2034 }
2035
2036 static bool __printf(6, 7)
2037 __phy_reg_verify_state(struct drm_i915_private *dev_priv, enum dpio_phy phy,
2038 i915_reg_t reg, u32 mask, u32 expected,
2039 const char *reg_fmt, ...)
2040 {
2041 struct va_format vaf;
2042 va_list args;
2043 u32 val;
2044
2045 val = I915_READ(reg);
2046 if ((val & mask) == expected)
2047 return true;
2048
2049 va_start(args, reg_fmt);
2050 vaf.fmt = reg_fmt;
2051 vaf.va = &args;
2052
2053 DRM_DEBUG_DRIVER("DDI PHY %d reg %pV [%08x] state mismatch: "
2054 "current %08x, expected %08x (mask %08x)\n",
2055 phy, &vaf, reg.reg, val, (val & ~mask) | expected,
2056 mask);
2057
2058 va_end(args);
2059
2060 return false;
2061 }
2062
2063 bool bxt_ddi_phy_verify_state(struct drm_i915_private *dev_priv,
2064 enum dpio_phy phy)
2065 {
2066 uint32_t mask;
2067 bool ok;
2068
2069 #define _CHK(reg, mask, exp, fmt, ...) \
2070 __phy_reg_verify_state(dev_priv, phy, reg, mask, exp, fmt, \
2071 ## __VA_ARGS__)
2072
2073 if (!bxt_ddi_phy_is_enabled(dev_priv, phy))
2074 return false;
2075
2076 ok = true;
2077
2078 /* PLL Rcomp code offset */
2079 ok &= _CHK(BXT_PORT_CL1CM_DW9(phy),
2080 IREF0RC_OFFSET_MASK, 0xe4 << IREF0RC_OFFSET_SHIFT,
2081 "BXT_PORT_CL1CM_DW9(%d)", phy);
2082 ok &= _CHK(BXT_PORT_CL1CM_DW10(phy),
2083 IREF1RC_OFFSET_MASK, 0xe4 << IREF1RC_OFFSET_SHIFT,
2084 "BXT_PORT_CL1CM_DW10(%d)", phy);
2085
2086 /* Power gating */
2087 mask = OCL1_POWER_DOWN_EN | DW28_OLDO_DYN_PWR_DOWN_EN | SUS_CLK_CONFIG;
2088 ok &= _CHK(BXT_PORT_CL1CM_DW28(phy), mask, mask,
2089 "BXT_PORT_CL1CM_DW28(%d)", phy);
2090
2091 if (phy == DPIO_PHY0)
2092 ok &= _CHK(BXT_PORT_CL2CM_DW6_BC,
2093 DW6_OLDO_DYN_PWR_DOWN_EN, DW6_OLDO_DYN_PWR_DOWN_EN,
2094 "BXT_PORT_CL2CM_DW6_BC");
2095
2096 /*
2097 * TODO: Verify BXT_PORT_CL1CM_DW30 bit OCL2_LDOFUSE_PWR_DIS,
2098 * at least on stepping A this bit is read-only and fixed at 0.
2099 */
2100
2101 if (phy == DPIO_PHY0) {
2102 u32 grc_code = dev_priv->bxt_phy_grc;
2103
2104 grc_code = grc_code << GRC_CODE_FAST_SHIFT |
2105 grc_code << GRC_CODE_SLOW_SHIFT |
2106 grc_code;
2107 mask = GRC_CODE_FAST_MASK | GRC_CODE_SLOW_MASK |
2108 GRC_CODE_NOM_MASK;
2109 ok &= _CHK(BXT_PORT_REF_DW6(DPIO_PHY0), mask, grc_code,
2110 "BXT_PORT_REF_DW6(%d)", DPIO_PHY0);
2111
2112 mask = GRC_DIS | GRC_RDY_OVRD;
2113 ok &= _CHK(BXT_PORT_REF_DW8(DPIO_PHY0), mask, mask,
2114 "BXT_PORT_REF_DW8(%d)", DPIO_PHY0);
2115 }
2116
2117 return ok;
2118 #undef _CHK
2119 }
2120
2121 static uint8_t
2122 bxt_ddi_phy_calc_lane_lat_optim_mask(struct intel_encoder *encoder,
2123 struct intel_crtc_state *pipe_config)
2124 {
2125 switch (pipe_config->lane_count) {
2126 case 1:
2127 return 0;
2128 case 2:
2129 return BIT(2) | BIT(0);
2130 case 4:
2131 return BIT(3) | BIT(2) | BIT(0);
2132 default:
2133 MISSING_CASE(pipe_config->lane_count);
2134
2135 return 0;
2136 }
2137 }
2138
2139 static void bxt_ddi_pre_pll_enable(struct intel_encoder *encoder,
2140 struct intel_crtc_state *pipe_config,
2141 struct drm_connector_state *conn_state)
2142 {
2143 struct intel_digital_port *dport = enc_to_dig_port(&encoder->base);
2144 struct drm_i915_private *dev_priv = to_i915(dport->base.base.dev);
2145 enum port port = dport->port;
2146 struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
2147 int lane;
2148
2149 for (lane = 0; lane < 4; lane++) {
2150 u32 val = I915_READ(BXT_PORT_TX_DW14_LN(port, lane));
2151
2152 /*
2153 * Note that on CHV this flag is called UPAR, but has
2154 * the same function.
2155 */
2156 val &= ~LATENCY_OPTIM;
2157 if (intel_crtc->config->lane_lat_optim_mask & BIT(lane))
2158 val |= LATENCY_OPTIM;
2159
2160 I915_WRITE(BXT_PORT_TX_DW14_LN(port, lane), val);
2161 }
2162 }
2163
2164 static uint8_t
2165 bxt_ddi_phy_get_lane_lat_optim_mask(struct intel_encoder *encoder)
2166 {
2167 struct intel_digital_port *dport = enc_to_dig_port(&encoder->base);
2168 struct drm_i915_private *dev_priv = to_i915(dport->base.base.dev);
2169 enum port port = dport->port;
2170 int lane;
2171 uint8_t mask;
2172
2173 mask = 0;
2174 for (lane = 0; lane < 4; lane++) {
2175 u32 val = I915_READ(BXT_PORT_TX_DW14_LN(port, lane));
2176
2177 if (val & LATENCY_OPTIM)
2178 mask |= BIT(lane);
2179 }
2180
2181 return mask;
2182 }
2183
2184 void intel_ddi_prepare_link_retrain(struct intel_dp *intel_dp)
2185 {
2186 struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
2187 struct drm_i915_private *dev_priv =
2188 to_i915(intel_dig_port->base.base.dev);
2189 enum port port = intel_dig_port->port;
2190 uint32_t val;
2191 bool wait = false;
2192
2193 if (I915_READ(DP_TP_CTL(port)) & DP_TP_CTL_ENABLE) {
2194 val = I915_READ(DDI_BUF_CTL(port));
2195 if (val & DDI_BUF_CTL_ENABLE) {
2196 val &= ~DDI_BUF_CTL_ENABLE;
2197 I915_WRITE(DDI_BUF_CTL(port), val);
2198 wait = true;
2199 }
2200
2201 val = I915_READ(DP_TP_CTL(port));
2202 val &= ~(DP_TP_CTL_ENABLE | DP_TP_CTL_LINK_TRAIN_MASK);
2203 val |= DP_TP_CTL_LINK_TRAIN_PAT1;
2204 I915_WRITE(DP_TP_CTL(port), val);
2205 POSTING_READ(DP_TP_CTL(port));
2206
2207 if (wait)
2208 intel_wait_ddi_buf_idle(dev_priv, port);
2209 }
2210
2211 val = DP_TP_CTL_ENABLE |
2212 DP_TP_CTL_LINK_TRAIN_PAT1 | DP_TP_CTL_SCRAMBLE_DISABLE;
2213 if (intel_dp->link_mst)
2214 val |= DP_TP_CTL_MODE_MST;
2215 else {
2216 val |= DP_TP_CTL_MODE_SST;
2217 if (drm_dp_enhanced_frame_cap(intel_dp->dpcd))
2218 val |= DP_TP_CTL_ENHANCED_FRAME_ENABLE;
2219 }
2220 I915_WRITE(DP_TP_CTL(port), val);
2221 POSTING_READ(DP_TP_CTL(port));
2222
2223 intel_dp->DP |= DDI_BUF_CTL_ENABLE;
2224 I915_WRITE(DDI_BUF_CTL(port), intel_dp->DP);
2225 POSTING_READ(DDI_BUF_CTL(port));
2226
2227 udelay(600);
2228 }
2229
2230 void intel_ddi_get_config(struct intel_encoder *encoder,
2231 struct intel_crtc_state *pipe_config)
2232 {
2233 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
2234 struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
2235 enum transcoder cpu_transcoder = pipe_config->cpu_transcoder;
2236 struct intel_hdmi *intel_hdmi;
2237 u32 temp, flags = 0;
2238
2239 /* XXX: DSI transcoder paranoia */
2240 if (WARN_ON(transcoder_is_dsi(cpu_transcoder)))
2241 return;
2242
2243 temp = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder));
2244 if (temp & TRANS_DDI_PHSYNC)
2245 flags |= DRM_MODE_FLAG_PHSYNC;
2246 else
2247 flags |= DRM_MODE_FLAG_NHSYNC;
2248 if (temp & TRANS_DDI_PVSYNC)
2249 flags |= DRM_MODE_FLAG_PVSYNC;
2250 else
2251 flags |= DRM_MODE_FLAG_NVSYNC;
2252
2253 pipe_config->base.adjusted_mode.flags |= flags;
2254
2255 switch (temp & TRANS_DDI_BPC_MASK) {
2256 case TRANS_DDI_BPC_6:
2257 pipe_config->pipe_bpp = 18;
2258 break;
2259 case TRANS_DDI_BPC_8:
2260 pipe_config->pipe_bpp = 24;
2261 break;
2262 case TRANS_DDI_BPC_10:
2263 pipe_config->pipe_bpp = 30;
2264 break;
2265 case TRANS_DDI_BPC_12:
2266 pipe_config->pipe_bpp = 36;
2267 break;
2268 default:
2269 break;
2270 }
2271
2272 switch (temp & TRANS_DDI_MODE_SELECT_MASK) {
2273 case TRANS_DDI_MODE_SELECT_HDMI:
2274 pipe_config->has_hdmi_sink = true;
2275 intel_hdmi = enc_to_intel_hdmi(&encoder->base);
2276
2277 if (intel_hdmi->infoframe_enabled(&encoder->base, pipe_config))
2278 pipe_config->has_infoframe = true;
2279 /* fall through */
2280 case TRANS_DDI_MODE_SELECT_DVI:
2281 pipe_config->lane_count = 4;
2282 break;
2283 case TRANS_DDI_MODE_SELECT_FDI:
2284 break;
2285 case TRANS_DDI_MODE_SELECT_DP_SST:
2286 case TRANS_DDI_MODE_SELECT_DP_MST:
2287 pipe_config->lane_count =
2288 ((temp & DDI_PORT_WIDTH_MASK) >> DDI_PORT_WIDTH_SHIFT) + 1;
2289 intel_dp_get_m_n(intel_crtc, pipe_config);
2290 break;
2291 default:
2292 break;
2293 }
2294
2295 if (intel_display_power_is_enabled(dev_priv, POWER_DOMAIN_AUDIO)) {
2296 temp = I915_READ(HSW_AUD_PIN_ELD_CP_VLD);
2297 if (temp & AUDIO_OUTPUT_ENABLE(intel_crtc->pipe))
2298 pipe_config->has_audio = true;
2299 }
2300
2301 if (encoder->type == INTEL_OUTPUT_EDP && dev_priv->vbt.edp.bpp &&
2302 pipe_config->pipe_bpp > dev_priv->vbt.edp.bpp) {
2303 /*
2304 * This is a big fat ugly hack.
2305 *
2306 * Some machines in UEFI boot mode provide us a VBT that has 18
2307 * bpp and 1.62 GHz link bandwidth for eDP, which for reasons
2308 * unknown we fail to light up. Yet the same BIOS boots up with
2309 * 24 bpp and 2.7 GHz link. Use the same bpp as the BIOS uses as
2310 * max, not what it tells us to use.
2311 *
2312 * Note: This will still be broken if the eDP panel is not lit
2313 * up by the BIOS, and thus we can't get the mode at module
2314 * load.
2315 */
2316 DRM_DEBUG_KMS("pipe has %d bpp for eDP panel, overriding BIOS-provided max %d bpp\n",
2317 pipe_config->pipe_bpp, dev_priv->vbt.edp.bpp);
2318 dev_priv->vbt.edp.bpp = pipe_config->pipe_bpp;
2319 }
2320
2321 intel_ddi_clock_get(encoder, pipe_config);
2322
2323 if (IS_BROXTON(dev_priv))
2324 pipe_config->lane_lat_optim_mask =
2325 bxt_ddi_phy_get_lane_lat_optim_mask(encoder);
2326 }
2327
2328 static bool intel_ddi_compute_config(struct intel_encoder *encoder,
2329 struct intel_crtc_state *pipe_config,
2330 struct drm_connector_state *conn_state)
2331 {
2332 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
2333 int type = encoder->type;
2334 int port = intel_ddi_get_encoder_port(encoder);
2335 int ret;
2336
2337 WARN(type == INTEL_OUTPUT_UNKNOWN, "compute_config() on unknown output!\n");
2338
2339 if (port == PORT_A)
2340 pipe_config->cpu_transcoder = TRANSCODER_EDP;
2341
2342 if (type == INTEL_OUTPUT_HDMI)
2343 ret = intel_hdmi_compute_config(encoder, pipe_config, conn_state);
2344 else
2345 ret = intel_dp_compute_config(encoder, pipe_config, conn_state);
2346
2347 if (IS_BROXTON(dev_priv) && ret)
2348 pipe_config->lane_lat_optim_mask =
2349 bxt_ddi_phy_calc_lane_lat_optim_mask(encoder,
2350 pipe_config);
2351
2352 return ret;
2353
2354 }
2355
2356 static const struct drm_encoder_funcs intel_ddi_funcs = {
2357 .reset = intel_dp_encoder_reset,
2358 .destroy = intel_dp_encoder_destroy,
2359 };
2360
2361 static struct intel_connector *
2362 intel_ddi_init_dp_connector(struct intel_digital_port *intel_dig_port)
2363 {
2364 struct intel_connector *connector;
2365 enum port port = intel_dig_port->port;
2366
2367 connector = intel_connector_alloc();
2368 if (!connector)
2369 return NULL;
2370
2371 intel_dig_port->dp.output_reg = DDI_BUF_CTL(port);
2372 if (!intel_dp_init_connector(intel_dig_port, connector)) {
2373 kfree(connector);
2374 return NULL;
2375 }
2376
2377 return connector;
2378 }
2379
2380 static struct intel_connector *
2381 intel_ddi_init_hdmi_connector(struct intel_digital_port *intel_dig_port)
2382 {
2383 struct intel_connector *connector;
2384 enum port port = intel_dig_port->port;
2385
2386 connector = intel_connector_alloc();
2387 if (!connector)
2388 return NULL;
2389
2390 intel_dig_port->hdmi.hdmi_reg = DDI_BUF_CTL(port);
2391 intel_hdmi_init_connector(intel_dig_port, connector);
2392
2393 return connector;
2394 }
2395
2396 struct intel_shared_dpll *
2397 intel_ddi_get_link_dpll(struct intel_dp *intel_dp, int clock)
2398 {
2399 struct intel_connector *connector = intel_dp->attached_connector;
2400 struct intel_encoder *encoder = connector->encoder;
2401 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
2402 struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
2403 struct intel_shared_dpll *pll = NULL;
2404 struct intel_shared_dpll_config tmp_pll_config;
2405 enum intel_dpll_id dpll_id;
2406
2407 if (IS_BROXTON(dev_priv)) {
2408 dpll_id = (enum intel_dpll_id)dig_port->port;
2409 /*
2410 * Select the required PLL. This works for platforms where
2411 * there is no shared DPLL.
2412 */
2413 pll = &dev_priv->shared_dplls[dpll_id];
2414 if (WARN_ON(pll->active_mask)) {
2415
2416 DRM_ERROR("Shared DPLL in use. active_mask:%x\n",
2417 pll->active_mask);
2418 return NULL;
2419 }
2420 tmp_pll_config = pll->config;
2421 if (!bxt_ddi_dp_set_dpll_hw_state(clock,
2422 &pll->config.hw_state)) {
2423 DRM_ERROR("Could not setup DPLL\n");
2424 pll->config = tmp_pll_config;
2425 return NULL;
2426 }
2427 } else if (IS_SKYLAKE(dev_priv)) {
2428 pll = skl_find_link_pll(dev_priv, clock);
2429 } else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) {
2430 pll = hsw_ddi_dp_get_dpll(encoder, clock);
2431 }
2432 return pll;
2433 }
2434
2435 void intel_ddi_init(struct drm_device *dev, enum port port)
2436 {
2437 struct drm_i915_private *dev_priv = to_i915(dev);
2438 struct intel_digital_port *intel_dig_port;
2439 struct intel_encoder *intel_encoder;
2440 struct drm_encoder *encoder;
2441 bool init_hdmi, init_dp;
2442 int max_lanes;
2443
2444 if (I915_READ(DDI_BUF_CTL(PORT_A)) & DDI_A_4_LANES) {
2445 switch (port) {
2446 case PORT_A:
2447 max_lanes = 4;
2448 break;
2449 case PORT_E:
2450 max_lanes = 0;
2451 break;
2452 default:
2453 max_lanes = 4;
2454 break;
2455 }
2456 } else {
2457 switch (port) {
2458 case PORT_A:
2459 max_lanes = 2;
2460 break;
2461 case PORT_E:
2462 max_lanes = 2;
2463 break;
2464 default:
2465 max_lanes = 4;
2466 break;
2467 }
2468 }
2469
2470 init_hdmi = (dev_priv->vbt.ddi_port_info[port].supports_dvi ||
2471 dev_priv->vbt.ddi_port_info[port].supports_hdmi);
2472 init_dp = dev_priv->vbt.ddi_port_info[port].supports_dp;
2473 if (!init_dp && !init_hdmi) {
2474 DRM_DEBUG_KMS("VBT says port %c is not DVI/HDMI/DP compatible, respect it\n",
2475 port_name(port));
2476 return;
2477 }
2478
2479 intel_dig_port = kzalloc(sizeof(*intel_dig_port), GFP_KERNEL);
2480 if (!intel_dig_port)
2481 return;
2482
2483 intel_encoder = &intel_dig_port->base;
2484 encoder = &intel_encoder->base;
2485
2486 drm_encoder_init(dev, encoder, &intel_ddi_funcs,
2487 DRM_MODE_ENCODER_TMDS, "DDI %c", port_name(port));
2488
2489 intel_encoder->compute_config = intel_ddi_compute_config;
2490 intel_encoder->enable = intel_enable_ddi;
2491 if (IS_BROXTON(dev_priv))
2492 intel_encoder->pre_pll_enable = bxt_ddi_pre_pll_enable;
2493 intel_encoder->pre_enable = intel_ddi_pre_enable;
2494 intel_encoder->disable = intel_disable_ddi;
2495 intel_encoder->post_disable = intel_ddi_post_disable;
2496 intel_encoder->get_hw_state = intel_ddi_get_hw_state;
2497 intel_encoder->get_config = intel_ddi_get_config;
2498 intel_encoder->suspend = intel_dp_encoder_suspend;
2499
2500 intel_dig_port->port = port;
2501 intel_dig_port->saved_port_bits = I915_READ(DDI_BUF_CTL(port)) &
2502 (DDI_BUF_PORT_REVERSAL |
2503 DDI_A_4_LANES);
2504
2505 /*
2506 * Bspec says that DDI_A_4_LANES is the only supported configuration
2507 * for Broxton. Yet some BIOS fail to set this bit on port A if eDP
2508 * wasn't lit up at boot. Force this bit on in our internal
2509 * configuration so that we use the proper lane count for our
2510 * calculations.
2511 */
2512 if (IS_BROXTON(dev) && port == PORT_A) {
2513 if (!(intel_dig_port->saved_port_bits & DDI_A_4_LANES)) {
2514 DRM_DEBUG_KMS("BXT BIOS forgot to set DDI_A_4_LANES for port A; fixing\n");
2515 intel_dig_port->saved_port_bits |= DDI_A_4_LANES;
2516 max_lanes = 4;
2517 }
2518 }
2519
2520 intel_dig_port->max_lanes = max_lanes;
2521
2522 intel_encoder->type = INTEL_OUTPUT_UNKNOWN;
2523 intel_encoder->crtc_mask = (1 << 0) | (1 << 1) | (1 << 2);
2524 intel_encoder->cloneable = 0;
2525
2526 if (init_dp) {
2527 if (!intel_ddi_init_dp_connector(intel_dig_port))
2528 goto err;
2529
2530 intel_dig_port->hpd_pulse = intel_dp_hpd_pulse;
2531 /*
2532 * On BXT A0/A1, sw needs to activate DDIA HPD logic and
2533 * interrupts to check the external panel connection.
2534 */
2535 if (IS_BXT_REVID(dev, 0, BXT_REVID_A1) && port == PORT_B)
2536 dev_priv->hotplug.irq_port[PORT_A] = intel_dig_port;
2537 else
2538 dev_priv->hotplug.irq_port[port] = intel_dig_port;
2539 }
2540
2541 /* In theory we don't need the encoder->type check, but leave it just in
2542 * case we have some really bad VBTs... */
2543 if (intel_encoder->type != INTEL_OUTPUT_EDP && init_hdmi) {
2544 if (!intel_ddi_init_hdmi_connector(intel_dig_port))
2545 goto err;
2546 }
2547
2548 return;
2549
2550 err:
2551 drm_encoder_cleanup(encoder);
2552 kfree(intel_dig_port);
2553 }
Linux kernel - Deliverables
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