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1 | /* | |
2 | * Copyright © 2008 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 | * Keith Packard <keithp@keithp.com> | |
25 | * | |
26 | */ | |
27 | ||
28 | #include <linux/i2c.h> | |
29 | #include <linux/slab.h> | |
30 | #include <linux/export.h> | |
31 | #include <drm/drmP.h> | |
32 | #include <drm/drm_crtc.h> | |
33 | #include <drm/drm_crtc_helper.h> | |
34 | #include <drm/drm_edid.h> | |
35 | #include "intel_drv.h" | |
36 | #include <drm/i915_drm.h> | |
37 | #include "i915_drv.h" | |
38 | ||
39 | #define DP_LINK_CHECK_TIMEOUT (10 * 1000) | |
40 | ||
41 | /** | |
42 | * is_edp - is the given port attached to an eDP panel (either CPU or PCH) | |
43 | * @intel_dp: DP struct | |
44 | * | |
45 | * If a CPU or PCH DP output is attached to an eDP panel, this function | |
46 | * will return true, and false otherwise. | |
47 | */ | |
48 | static bool is_edp(struct intel_dp *intel_dp) | |
49 | { | |
50 | return intel_dp->base.type == INTEL_OUTPUT_EDP; | |
51 | } | |
52 | ||
53 | /** | |
54 | * is_pch_edp - is the port on the PCH and attached to an eDP panel? | |
55 | * @intel_dp: DP struct | |
56 | * | |
57 | * Returns true if the given DP struct corresponds to a PCH DP port attached | |
58 | * to an eDP panel, false otherwise. Helpful for determining whether we | |
59 | * may need FDI resources for a given DP output or not. | |
60 | */ | |
61 | static bool is_pch_edp(struct intel_dp *intel_dp) | |
62 | { | |
63 | return intel_dp->is_pch_edp; | |
64 | } | |
65 | ||
66 | /** | |
67 | * is_cpu_edp - is the port on the CPU and attached to an eDP panel? | |
68 | * @intel_dp: DP struct | |
69 | * | |
70 | * Returns true if the given DP struct corresponds to a CPU eDP port. | |
71 | */ | |
72 | static bool is_cpu_edp(struct intel_dp *intel_dp) | |
73 | { | |
74 | return is_edp(intel_dp) && !is_pch_edp(intel_dp); | |
75 | } | |
76 | ||
77 | static struct drm_device *intel_dp_to_dev(struct intel_dp *intel_dp) | |
78 | { | |
79 | return intel_dp->base.base.dev; | |
80 | } | |
81 | ||
82 | static struct intel_dp *intel_attached_dp(struct drm_connector *connector) | |
83 | { | |
84 | return enc_to_intel_dp(&intel_attached_encoder(connector)->base); | |
85 | } | |
86 | ||
87 | /** | |
88 | * intel_encoder_is_pch_edp - is the given encoder a PCH attached eDP? | |
89 | * @encoder: DRM encoder | |
90 | * | |
91 | * Return true if @encoder corresponds to a PCH attached eDP panel. Needed | |
92 | * by intel_display.c. | |
93 | */ | |
94 | bool intel_encoder_is_pch_edp(struct drm_encoder *encoder) | |
95 | { | |
96 | struct intel_dp *intel_dp; | |
97 | ||
98 | if (!encoder) | |
99 | return false; | |
100 | ||
101 | intel_dp = enc_to_intel_dp(encoder); | |
102 | ||
103 | return is_pch_edp(intel_dp); | |
104 | } | |
105 | ||
106 | static void intel_dp_link_down(struct intel_dp *intel_dp); | |
107 | ||
108 | void | |
109 | intel_edp_link_config(struct intel_encoder *intel_encoder, | |
110 | int *lane_num, int *link_bw) | |
111 | { | |
112 | struct intel_dp *intel_dp = enc_to_intel_dp(&intel_encoder->base); | |
113 | ||
114 | *lane_num = intel_dp->lane_count; | |
115 | *link_bw = drm_dp_bw_code_to_link_rate(intel_dp->link_bw); | |
116 | } | |
117 | ||
118 | int | |
119 | intel_edp_target_clock(struct intel_encoder *intel_encoder, | |
120 | struct drm_display_mode *mode) | |
121 | { | |
122 | struct intel_dp *intel_dp = enc_to_intel_dp(&intel_encoder->base); | |
123 | struct intel_connector *intel_connector = intel_dp->attached_connector; | |
124 | ||
125 | if (intel_connector->panel.fixed_mode) | |
126 | return intel_connector->panel.fixed_mode->clock; | |
127 | else | |
128 | return mode->clock; | |
129 | } | |
130 | ||
131 | static int | |
132 | intel_dp_max_link_bw(struct intel_dp *intel_dp) | |
133 | { | |
134 | int max_link_bw = intel_dp->dpcd[DP_MAX_LINK_RATE]; | |
135 | ||
136 | switch (max_link_bw) { | |
137 | case DP_LINK_BW_1_62: | |
138 | case DP_LINK_BW_2_7: | |
139 | break; | |
140 | default: | |
141 | max_link_bw = DP_LINK_BW_1_62; | |
142 | break; | |
143 | } | |
144 | return max_link_bw; | |
145 | } | |
146 | ||
147 | static int | |
148 | intel_dp_link_clock(uint8_t link_bw) | |
149 | { | |
150 | if (link_bw == DP_LINK_BW_2_7) | |
151 | return 270000; | |
152 | else | |
153 | return 162000; | |
154 | } | |
155 | ||
156 | /* | |
157 | * The units on the numbers in the next two are... bizarre. Examples will | |
158 | * make it clearer; this one parallels an example in the eDP spec. | |
159 | * | |
160 | * intel_dp_max_data_rate for one lane of 2.7GHz evaluates as: | |
161 | * | |
162 | * 270000 * 1 * 8 / 10 == 216000 | |
163 | * | |
164 | * The actual data capacity of that configuration is 2.16Gbit/s, so the | |
165 | * units are decakilobits. ->clock in a drm_display_mode is in kilohertz - | |
166 | * or equivalently, kilopixels per second - so for 1680x1050R it'd be | |
167 | * 119000. At 18bpp that's 2142000 kilobits per second. | |
168 | * | |
169 | * Thus the strange-looking division by 10 in intel_dp_link_required, to | |
170 | * get the result in decakilobits instead of kilobits. | |
171 | */ | |
172 | ||
173 | static int | |
174 | intel_dp_link_required(int pixel_clock, int bpp) | |
175 | { | |
176 | return (pixel_clock * bpp + 9) / 10; | |
177 | } | |
178 | ||
179 | static int | |
180 | intel_dp_max_data_rate(int max_link_clock, int max_lanes) | |
181 | { | |
182 | return (max_link_clock * max_lanes * 8) / 10; | |
183 | } | |
184 | ||
185 | static bool | |
186 | intel_dp_adjust_dithering(struct intel_dp *intel_dp, | |
187 | struct drm_display_mode *mode, | |
188 | bool adjust_mode) | |
189 | { | |
190 | int max_link_clock = intel_dp_link_clock(intel_dp_max_link_bw(intel_dp)); | |
191 | int max_lanes = drm_dp_max_lane_count(intel_dp->dpcd); | |
192 | int max_rate, mode_rate; | |
193 | ||
194 | mode_rate = intel_dp_link_required(mode->clock, 24); | |
195 | max_rate = intel_dp_max_data_rate(max_link_clock, max_lanes); | |
196 | ||
197 | if (mode_rate > max_rate) { | |
198 | mode_rate = intel_dp_link_required(mode->clock, 18); | |
199 | if (mode_rate > max_rate) | |
200 | return false; | |
201 | ||
202 | if (adjust_mode) | |
203 | mode->private_flags | |
204 | |= INTEL_MODE_DP_FORCE_6BPC; | |
205 | ||
206 | return true; | |
207 | } | |
208 | ||
209 | return true; | |
210 | } | |
211 | ||
212 | static int | |
213 | intel_dp_mode_valid(struct drm_connector *connector, | |
214 | struct drm_display_mode *mode) | |
215 | { | |
216 | struct intel_dp *intel_dp = intel_attached_dp(connector); | |
217 | struct intel_connector *intel_connector = to_intel_connector(connector); | |
218 | struct drm_display_mode *fixed_mode = intel_connector->panel.fixed_mode; | |
219 | ||
220 | if (is_edp(intel_dp) && fixed_mode) { | |
221 | if (mode->hdisplay > fixed_mode->hdisplay) | |
222 | return MODE_PANEL; | |
223 | ||
224 | if (mode->vdisplay > fixed_mode->vdisplay) | |
225 | return MODE_PANEL; | |
226 | } | |
227 | ||
228 | if (!intel_dp_adjust_dithering(intel_dp, mode, false)) | |
229 | return MODE_CLOCK_HIGH; | |
230 | ||
231 | if (mode->clock < 10000) | |
232 | return MODE_CLOCK_LOW; | |
233 | ||
234 | if (mode->flags & DRM_MODE_FLAG_DBLCLK) | |
235 | return MODE_H_ILLEGAL; | |
236 | ||
237 | return MODE_OK; | |
238 | } | |
239 | ||
240 | static uint32_t | |
241 | pack_aux(uint8_t *src, int src_bytes) | |
242 | { | |
243 | int i; | |
244 | uint32_t v = 0; | |
245 | ||
246 | if (src_bytes > 4) | |
247 | src_bytes = 4; | |
248 | for (i = 0; i < src_bytes; i++) | |
249 | v |= ((uint32_t) src[i]) << ((3-i) * 8); | |
250 | return v; | |
251 | } | |
252 | ||
253 | static void | |
254 | unpack_aux(uint32_t src, uint8_t *dst, int dst_bytes) | |
255 | { | |
256 | int i; | |
257 | if (dst_bytes > 4) | |
258 | dst_bytes = 4; | |
259 | for (i = 0; i < dst_bytes; i++) | |
260 | dst[i] = src >> ((3-i) * 8); | |
261 | } | |
262 | ||
263 | /* hrawclock is 1/4 the FSB frequency */ | |
264 | static int | |
265 | intel_hrawclk(struct drm_device *dev) | |
266 | { | |
267 | struct drm_i915_private *dev_priv = dev->dev_private; | |
268 | uint32_t clkcfg; | |
269 | ||
270 | /* There is no CLKCFG reg in Valleyview. VLV hrawclk is 200 MHz */ | |
271 | if (IS_VALLEYVIEW(dev)) | |
272 | return 200; | |
273 | ||
274 | clkcfg = I915_READ(CLKCFG); | |
275 | switch (clkcfg & CLKCFG_FSB_MASK) { | |
276 | case CLKCFG_FSB_400: | |
277 | return 100; | |
278 | case CLKCFG_FSB_533: | |
279 | return 133; | |
280 | case CLKCFG_FSB_667: | |
281 | return 166; | |
282 | case CLKCFG_FSB_800: | |
283 | return 200; | |
284 | case CLKCFG_FSB_1067: | |
285 | return 266; | |
286 | case CLKCFG_FSB_1333: | |
287 | return 333; | |
288 | /* these two are just a guess; one of them might be right */ | |
289 | case CLKCFG_FSB_1600: | |
290 | case CLKCFG_FSB_1600_ALT: | |
291 | return 400; | |
292 | default: | |
293 | return 133; | |
294 | } | |
295 | } | |
296 | ||
297 | static bool ironlake_edp_have_panel_power(struct intel_dp *intel_dp) | |
298 | { | |
299 | struct drm_device *dev = intel_dp_to_dev(intel_dp); | |
300 | struct drm_i915_private *dev_priv = dev->dev_private; | |
301 | ||
302 | return (I915_READ(PCH_PP_STATUS) & PP_ON) != 0; | |
303 | } | |
304 | ||
305 | static bool ironlake_edp_have_panel_vdd(struct intel_dp *intel_dp) | |
306 | { | |
307 | struct drm_device *dev = intel_dp_to_dev(intel_dp); | |
308 | struct drm_i915_private *dev_priv = dev->dev_private; | |
309 | ||
310 | return (I915_READ(PCH_PP_CONTROL) & EDP_FORCE_VDD) != 0; | |
311 | } | |
312 | ||
313 | static void | |
314 | intel_dp_check_edp(struct intel_dp *intel_dp) | |
315 | { | |
316 | struct drm_device *dev = intel_dp_to_dev(intel_dp); | |
317 | struct drm_i915_private *dev_priv = dev->dev_private; | |
318 | ||
319 | if (!is_edp(intel_dp)) | |
320 | return; | |
321 | if (!ironlake_edp_have_panel_power(intel_dp) && !ironlake_edp_have_panel_vdd(intel_dp)) { | |
322 | WARN(1, "eDP powered off while attempting aux channel communication.\n"); | |
323 | DRM_DEBUG_KMS("Status 0x%08x Control 0x%08x\n", | |
324 | I915_READ(PCH_PP_STATUS), | |
325 | I915_READ(PCH_PP_CONTROL)); | |
326 | } | |
327 | } | |
328 | ||
329 | static int | |
330 | intel_dp_aux_ch(struct intel_dp *intel_dp, | |
331 | uint8_t *send, int send_bytes, | |
332 | uint8_t *recv, int recv_size) | |
333 | { | |
334 | uint32_t output_reg = intel_dp->output_reg; | |
335 | struct drm_device *dev = intel_dp_to_dev(intel_dp); | |
336 | struct drm_i915_private *dev_priv = dev->dev_private; | |
337 | uint32_t ch_ctl = output_reg + 0x10; | |
338 | uint32_t ch_data = ch_ctl + 4; | |
339 | int i; | |
340 | int recv_bytes; | |
341 | uint32_t status; | |
342 | uint32_t aux_clock_divider; | |
343 | int try, precharge; | |
344 | ||
345 | if (IS_HASWELL(dev)) { | |
346 | switch (intel_dp->port) { | |
347 | case PORT_A: | |
348 | ch_ctl = DPA_AUX_CH_CTL; | |
349 | ch_data = DPA_AUX_CH_DATA1; | |
350 | break; | |
351 | case PORT_B: | |
352 | ch_ctl = PCH_DPB_AUX_CH_CTL; | |
353 | ch_data = PCH_DPB_AUX_CH_DATA1; | |
354 | break; | |
355 | case PORT_C: | |
356 | ch_ctl = PCH_DPC_AUX_CH_CTL; | |
357 | ch_data = PCH_DPC_AUX_CH_DATA1; | |
358 | break; | |
359 | case PORT_D: | |
360 | ch_ctl = PCH_DPD_AUX_CH_CTL; | |
361 | ch_data = PCH_DPD_AUX_CH_DATA1; | |
362 | break; | |
363 | default: | |
364 | BUG(); | |
365 | } | |
366 | } | |
367 | ||
368 | intel_dp_check_edp(intel_dp); | |
369 | /* The clock divider is based off the hrawclk, | |
370 | * and would like to run at 2MHz. So, take the | |
371 | * hrawclk value and divide by 2 and use that | |
372 | * | |
373 | * Note that PCH attached eDP panels should use a 125MHz input | |
374 | * clock divider. | |
375 | */ | |
376 | if (is_cpu_edp(intel_dp)) { | |
377 | if (IS_HASWELL(dev)) | |
378 | aux_clock_divider = intel_ddi_get_cdclk_freq(dev_priv) >> 1; | |
379 | else if (IS_VALLEYVIEW(dev)) | |
380 | aux_clock_divider = 100; | |
381 | else if (IS_GEN6(dev) || IS_GEN7(dev)) | |
382 | aux_clock_divider = 200; /* SNB & IVB eDP input clock at 400Mhz */ | |
383 | else | |
384 | aux_clock_divider = 225; /* eDP input clock at 450Mhz */ | |
385 | } else if (HAS_PCH_SPLIT(dev)) | |
386 | aux_clock_divider = DIV_ROUND_UP(intel_pch_rawclk(dev), 2); | |
387 | else | |
388 | aux_clock_divider = intel_hrawclk(dev) / 2; | |
389 | ||
390 | if (IS_GEN6(dev)) | |
391 | precharge = 3; | |
392 | else | |
393 | precharge = 5; | |
394 | ||
395 | /* Try to wait for any previous AUX channel activity */ | |
396 | for (try = 0; try < 3; try++) { | |
397 | status = I915_READ(ch_ctl); | |
398 | if ((status & DP_AUX_CH_CTL_SEND_BUSY) == 0) | |
399 | break; | |
400 | msleep(1); | |
401 | } | |
402 | ||
403 | if (try == 3) { | |
404 | WARN(1, "dp_aux_ch not started status 0x%08x\n", | |
405 | I915_READ(ch_ctl)); | |
406 | return -EBUSY; | |
407 | } | |
408 | ||
409 | /* Must try at least 3 times according to DP spec */ | |
410 | for (try = 0; try < 5; try++) { | |
411 | /* Load the send data into the aux channel data registers */ | |
412 | for (i = 0; i < send_bytes; i += 4) | |
413 | I915_WRITE(ch_data + i, | |
414 | pack_aux(send + i, send_bytes - i)); | |
415 | ||
416 | /* Send the command and wait for it to complete */ | |
417 | I915_WRITE(ch_ctl, | |
418 | DP_AUX_CH_CTL_SEND_BUSY | | |
419 | DP_AUX_CH_CTL_TIME_OUT_400us | | |
420 | (send_bytes << DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT) | | |
421 | (precharge << DP_AUX_CH_CTL_PRECHARGE_2US_SHIFT) | | |
422 | (aux_clock_divider << DP_AUX_CH_CTL_BIT_CLOCK_2X_SHIFT) | | |
423 | DP_AUX_CH_CTL_DONE | | |
424 | DP_AUX_CH_CTL_TIME_OUT_ERROR | | |
425 | DP_AUX_CH_CTL_RECEIVE_ERROR); | |
426 | for (;;) { | |
427 | status = I915_READ(ch_ctl); | |
428 | if ((status & DP_AUX_CH_CTL_SEND_BUSY) == 0) | |
429 | break; | |
430 | udelay(100); | |
431 | } | |
432 | ||
433 | /* Clear done status and any errors */ | |
434 | I915_WRITE(ch_ctl, | |
435 | status | | |
436 | DP_AUX_CH_CTL_DONE | | |
437 | DP_AUX_CH_CTL_TIME_OUT_ERROR | | |
438 | DP_AUX_CH_CTL_RECEIVE_ERROR); | |
439 | ||
440 | if (status & (DP_AUX_CH_CTL_TIME_OUT_ERROR | | |
441 | DP_AUX_CH_CTL_RECEIVE_ERROR)) | |
442 | continue; | |
443 | if (status & DP_AUX_CH_CTL_DONE) | |
444 | break; | |
445 | } | |
446 | ||
447 | if ((status & DP_AUX_CH_CTL_DONE) == 0) { | |
448 | DRM_ERROR("dp_aux_ch not done status 0x%08x\n", status); | |
449 | return -EBUSY; | |
450 | } | |
451 | ||
452 | /* Check for timeout or receive error. | |
453 | * Timeouts occur when the sink is not connected | |
454 | */ | |
455 | if (status & DP_AUX_CH_CTL_RECEIVE_ERROR) { | |
456 | DRM_ERROR("dp_aux_ch receive error status 0x%08x\n", status); | |
457 | return -EIO; | |
458 | } | |
459 | ||
460 | /* Timeouts occur when the device isn't connected, so they're | |
461 | * "normal" -- don't fill the kernel log with these */ | |
462 | if (status & DP_AUX_CH_CTL_TIME_OUT_ERROR) { | |
463 | DRM_DEBUG_KMS("dp_aux_ch timeout status 0x%08x\n", status); | |
464 | return -ETIMEDOUT; | |
465 | } | |
466 | ||
467 | /* Unload any bytes sent back from the other side */ | |
468 | recv_bytes = ((status & DP_AUX_CH_CTL_MESSAGE_SIZE_MASK) >> | |
469 | DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT); | |
470 | if (recv_bytes > recv_size) | |
471 | recv_bytes = recv_size; | |
472 | ||
473 | for (i = 0; i < recv_bytes; i += 4) | |
474 | unpack_aux(I915_READ(ch_data + i), | |
475 | recv + i, recv_bytes - i); | |
476 | ||
477 | return recv_bytes; | |
478 | } | |
479 | ||
480 | /* Write data to the aux channel in native mode */ | |
481 | static int | |
482 | intel_dp_aux_native_write(struct intel_dp *intel_dp, | |
483 | uint16_t address, uint8_t *send, int send_bytes) | |
484 | { | |
485 | int ret; | |
486 | uint8_t msg[20]; | |
487 | int msg_bytes; | |
488 | uint8_t ack; | |
489 | ||
490 | intel_dp_check_edp(intel_dp); | |
491 | if (send_bytes > 16) | |
492 | return -1; | |
493 | msg[0] = AUX_NATIVE_WRITE << 4; | |
494 | msg[1] = address >> 8; | |
495 | msg[2] = address & 0xff; | |
496 | msg[3] = send_bytes - 1; | |
497 | memcpy(&msg[4], send, send_bytes); | |
498 | msg_bytes = send_bytes + 4; | |
499 | for (;;) { | |
500 | ret = intel_dp_aux_ch(intel_dp, msg, msg_bytes, &ack, 1); | |
501 | if (ret < 0) | |
502 | return ret; | |
503 | if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_ACK) | |
504 | break; | |
505 | else if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_DEFER) | |
506 | udelay(100); | |
507 | else | |
508 | return -EIO; | |
509 | } | |
510 | return send_bytes; | |
511 | } | |
512 | ||
513 | /* Write a single byte to the aux channel in native mode */ | |
514 | static int | |
515 | intel_dp_aux_native_write_1(struct intel_dp *intel_dp, | |
516 | uint16_t address, uint8_t byte) | |
517 | { | |
518 | return intel_dp_aux_native_write(intel_dp, address, &byte, 1); | |
519 | } | |
520 | ||
521 | /* read bytes from a native aux channel */ | |
522 | static int | |
523 | intel_dp_aux_native_read(struct intel_dp *intel_dp, | |
524 | uint16_t address, uint8_t *recv, int recv_bytes) | |
525 | { | |
526 | uint8_t msg[4]; | |
527 | int msg_bytes; | |
528 | uint8_t reply[20]; | |
529 | int reply_bytes; | |
530 | uint8_t ack; | |
531 | int ret; | |
532 | ||
533 | intel_dp_check_edp(intel_dp); | |
534 | msg[0] = AUX_NATIVE_READ << 4; | |
535 | msg[1] = address >> 8; | |
536 | msg[2] = address & 0xff; | |
537 | msg[3] = recv_bytes - 1; | |
538 | ||
539 | msg_bytes = 4; | |
540 | reply_bytes = recv_bytes + 1; | |
541 | ||
542 | for (;;) { | |
543 | ret = intel_dp_aux_ch(intel_dp, msg, msg_bytes, | |
544 | reply, reply_bytes); | |
545 | if (ret == 0) | |
546 | return -EPROTO; | |
547 | if (ret < 0) | |
548 | return ret; | |
549 | ack = reply[0]; | |
550 | if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_ACK) { | |
551 | memcpy(recv, reply + 1, ret - 1); | |
552 | return ret - 1; | |
553 | } | |
554 | else if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_DEFER) | |
555 | udelay(100); | |
556 | else | |
557 | return -EIO; | |
558 | } | |
559 | } | |
560 | ||
561 | static int | |
562 | intel_dp_i2c_aux_ch(struct i2c_adapter *adapter, int mode, | |
563 | uint8_t write_byte, uint8_t *read_byte) | |
564 | { | |
565 | struct i2c_algo_dp_aux_data *algo_data = adapter->algo_data; | |
566 | struct intel_dp *intel_dp = container_of(adapter, | |
567 | struct intel_dp, | |
568 | adapter); | |
569 | uint16_t address = algo_data->address; | |
570 | uint8_t msg[5]; | |
571 | uint8_t reply[2]; | |
572 | unsigned retry; | |
573 | int msg_bytes; | |
574 | int reply_bytes; | |
575 | int ret; | |
576 | ||
577 | intel_dp_check_edp(intel_dp); | |
578 | /* Set up the command byte */ | |
579 | if (mode & MODE_I2C_READ) | |
580 | msg[0] = AUX_I2C_READ << 4; | |
581 | else | |
582 | msg[0] = AUX_I2C_WRITE << 4; | |
583 | ||
584 | if (!(mode & MODE_I2C_STOP)) | |
585 | msg[0] |= AUX_I2C_MOT << 4; | |
586 | ||
587 | msg[1] = address >> 8; | |
588 | msg[2] = address; | |
589 | ||
590 | switch (mode) { | |
591 | case MODE_I2C_WRITE: | |
592 | msg[3] = 0; | |
593 | msg[4] = write_byte; | |
594 | msg_bytes = 5; | |
595 | reply_bytes = 1; | |
596 | break; | |
597 | case MODE_I2C_READ: | |
598 | msg[3] = 0; | |
599 | msg_bytes = 4; | |
600 | reply_bytes = 2; | |
601 | break; | |
602 | default: | |
603 | msg_bytes = 3; | |
604 | reply_bytes = 1; | |
605 | break; | |
606 | } | |
607 | ||
608 | for (retry = 0; retry < 5; retry++) { | |
609 | ret = intel_dp_aux_ch(intel_dp, | |
610 | msg, msg_bytes, | |
611 | reply, reply_bytes); | |
612 | if (ret < 0) { | |
613 | DRM_DEBUG_KMS("aux_ch failed %d\n", ret); | |
614 | return ret; | |
615 | } | |
616 | ||
617 | switch (reply[0] & AUX_NATIVE_REPLY_MASK) { | |
618 | case AUX_NATIVE_REPLY_ACK: | |
619 | /* I2C-over-AUX Reply field is only valid | |
620 | * when paired with AUX ACK. | |
621 | */ | |
622 | break; | |
623 | case AUX_NATIVE_REPLY_NACK: | |
624 | DRM_DEBUG_KMS("aux_ch native nack\n"); | |
625 | return -EREMOTEIO; | |
626 | case AUX_NATIVE_REPLY_DEFER: | |
627 | udelay(100); | |
628 | continue; | |
629 | default: | |
630 | DRM_ERROR("aux_ch invalid native reply 0x%02x\n", | |
631 | reply[0]); | |
632 | return -EREMOTEIO; | |
633 | } | |
634 | ||
635 | switch (reply[0] & AUX_I2C_REPLY_MASK) { | |
636 | case AUX_I2C_REPLY_ACK: | |
637 | if (mode == MODE_I2C_READ) { | |
638 | *read_byte = reply[1]; | |
639 | } | |
640 | return reply_bytes - 1; | |
641 | case AUX_I2C_REPLY_NACK: | |
642 | DRM_DEBUG_KMS("aux_i2c nack\n"); | |
643 | return -EREMOTEIO; | |
644 | case AUX_I2C_REPLY_DEFER: | |
645 | DRM_DEBUG_KMS("aux_i2c defer\n"); | |
646 | udelay(100); | |
647 | break; | |
648 | default: | |
649 | DRM_ERROR("aux_i2c invalid reply 0x%02x\n", reply[0]); | |
650 | return -EREMOTEIO; | |
651 | } | |
652 | } | |
653 | ||
654 | DRM_ERROR("too many retries, giving up\n"); | |
655 | return -EREMOTEIO; | |
656 | } | |
657 | ||
658 | static int | |
659 | intel_dp_i2c_init(struct intel_dp *intel_dp, | |
660 | struct intel_connector *intel_connector, const char *name) | |
661 | { | |
662 | int ret; | |
663 | ||
664 | DRM_DEBUG_KMS("i2c_init %s\n", name); | |
665 | intel_dp->algo.running = false; | |
666 | intel_dp->algo.address = 0; | |
667 | intel_dp->algo.aux_ch = intel_dp_i2c_aux_ch; | |
668 | ||
669 | memset(&intel_dp->adapter, '\0', sizeof(intel_dp->adapter)); | |
670 | intel_dp->adapter.owner = THIS_MODULE; | |
671 | intel_dp->adapter.class = I2C_CLASS_DDC; | |
672 | strncpy(intel_dp->adapter.name, name, sizeof(intel_dp->adapter.name) - 1); | |
673 | intel_dp->adapter.name[sizeof(intel_dp->adapter.name) - 1] = '\0'; | |
674 | intel_dp->adapter.algo_data = &intel_dp->algo; | |
675 | intel_dp->adapter.dev.parent = &intel_connector->base.kdev; | |
676 | ||
677 | ironlake_edp_panel_vdd_on(intel_dp); | |
678 | ret = i2c_dp_aux_add_bus(&intel_dp->adapter); | |
679 | ironlake_edp_panel_vdd_off(intel_dp, false); | |
680 | return ret; | |
681 | } | |
682 | ||
683 | static bool | |
684 | intel_dp_mode_fixup(struct drm_encoder *encoder, | |
685 | const struct drm_display_mode *mode, | |
686 | struct drm_display_mode *adjusted_mode) | |
687 | { | |
688 | struct drm_device *dev = encoder->dev; | |
689 | struct intel_dp *intel_dp = enc_to_intel_dp(encoder); | |
690 | struct intel_connector *intel_connector = intel_dp->attached_connector; | |
691 | int lane_count, clock; | |
692 | int max_lane_count = drm_dp_max_lane_count(intel_dp->dpcd); | |
693 | int max_clock = intel_dp_max_link_bw(intel_dp) == DP_LINK_BW_2_7 ? 1 : 0; | |
694 | int bpp, mode_rate; | |
695 | static int bws[2] = { DP_LINK_BW_1_62, DP_LINK_BW_2_7 }; | |
696 | ||
697 | if (is_edp(intel_dp) && intel_connector->panel.fixed_mode) { | |
698 | intel_fixed_panel_mode(intel_connector->panel.fixed_mode, | |
699 | adjusted_mode); | |
700 | intel_pch_panel_fitting(dev, | |
701 | intel_connector->panel.fitting_mode, | |
702 | mode, adjusted_mode); | |
703 | } | |
704 | ||
705 | if (adjusted_mode->flags & DRM_MODE_FLAG_DBLCLK) | |
706 | return false; | |
707 | ||
708 | DRM_DEBUG_KMS("DP link computation with max lane count %i " | |
709 | "max bw %02x pixel clock %iKHz\n", | |
710 | max_lane_count, bws[max_clock], adjusted_mode->clock); | |
711 | ||
712 | if (!intel_dp_adjust_dithering(intel_dp, adjusted_mode, true)) | |
713 | return false; | |
714 | ||
715 | bpp = adjusted_mode->private_flags & INTEL_MODE_DP_FORCE_6BPC ? 18 : 24; | |
716 | mode_rate = intel_dp_link_required(adjusted_mode->clock, bpp); | |
717 | ||
718 | for (clock = 0; clock <= max_clock; clock++) { | |
719 | for (lane_count = 1; lane_count <= max_lane_count; lane_count <<= 1) { | |
720 | int link_avail = intel_dp_max_data_rate(intel_dp_link_clock(bws[clock]), lane_count); | |
721 | ||
722 | if (mode_rate <= link_avail) { | |
723 | intel_dp->link_bw = bws[clock]; | |
724 | intel_dp->lane_count = lane_count; | |
725 | adjusted_mode->clock = intel_dp_link_clock(intel_dp->link_bw); | |
726 | DRM_DEBUG_KMS("DP link bw %02x lane " | |
727 | "count %d clock %d bpp %d\n", | |
728 | intel_dp->link_bw, intel_dp->lane_count, | |
729 | adjusted_mode->clock, bpp); | |
730 | DRM_DEBUG_KMS("DP link bw required %i available %i\n", | |
731 | mode_rate, link_avail); | |
732 | return true; | |
733 | } | |
734 | } | |
735 | } | |
736 | ||
737 | return false; | |
738 | } | |
739 | ||
740 | struct intel_dp_m_n { | |
741 | uint32_t tu; | |
742 | uint32_t gmch_m; | |
743 | uint32_t gmch_n; | |
744 | uint32_t link_m; | |
745 | uint32_t link_n; | |
746 | }; | |
747 | ||
748 | static void | |
749 | intel_reduce_ratio(uint32_t *num, uint32_t *den) | |
750 | { | |
751 | while (*num > 0xffffff || *den > 0xffffff) { | |
752 | *num >>= 1; | |
753 | *den >>= 1; | |
754 | } | |
755 | } | |
756 | ||
757 | static void | |
758 | intel_dp_compute_m_n(int bpp, | |
759 | int nlanes, | |
760 | int pixel_clock, | |
761 | int link_clock, | |
762 | struct intel_dp_m_n *m_n) | |
763 | { | |
764 | m_n->tu = 64; | |
765 | m_n->gmch_m = (pixel_clock * bpp) >> 3; | |
766 | m_n->gmch_n = link_clock * nlanes; | |
767 | intel_reduce_ratio(&m_n->gmch_m, &m_n->gmch_n); | |
768 | m_n->link_m = pixel_clock; | |
769 | m_n->link_n = link_clock; | |
770 | intel_reduce_ratio(&m_n->link_m, &m_n->link_n); | |
771 | } | |
772 | ||
773 | void | |
774 | intel_dp_set_m_n(struct drm_crtc *crtc, struct drm_display_mode *mode, | |
775 | struct drm_display_mode *adjusted_mode) | |
776 | { | |
777 | struct drm_device *dev = crtc->dev; | |
778 | struct intel_encoder *intel_encoder; | |
779 | struct intel_dp *intel_dp; | |
780 | struct drm_i915_private *dev_priv = dev->dev_private; | |
781 | struct intel_crtc *intel_crtc = to_intel_crtc(crtc); | |
782 | int lane_count = 4; | |
783 | struct intel_dp_m_n m_n; | |
784 | int pipe = intel_crtc->pipe; | |
785 | enum transcoder cpu_transcoder = intel_crtc->cpu_transcoder; | |
786 | ||
787 | /* | |
788 | * Find the lane count in the intel_encoder private | |
789 | */ | |
790 | for_each_encoder_on_crtc(dev, crtc, intel_encoder) { | |
791 | intel_dp = enc_to_intel_dp(&intel_encoder->base); | |
792 | ||
793 | if (intel_encoder->type == INTEL_OUTPUT_DISPLAYPORT || | |
794 | intel_encoder->type == INTEL_OUTPUT_EDP) | |
795 | { | |
796 | lane_count = intel_dp->lane_count; | |
797 | break; | |
798 | } | |
799 | } | |
800 | ||
801 | /* | |
802 | * Compute the GMCH and Link ratios. The '3' here is | |
803 | * the number of bytes_per_pixel post-LUT, which we always | |
804 | * set up for 8-bits of R/G/B, or 3 bytes total. | |
805 | */ | |
806 | intel_dp_compute_m_n(intel_crtc->bpp, lane_count, | |
807 | mode->clock, adjusted_mode->clock, &m_n); | |
808 | ||
809 | if (IS_HASWELL(dev)) { | |
810 | I915_WRITE(PIPE_DATA_M1(cpu_transcoder), | |
811 | TU_SIZE(m_n.tu) | m_n.gmch_m); | |
812 | I915_WRITE(PIPE_DATA_N1(cpu_transcoder), m_n.gmch_n); | |
813 | I915_WRITE(PIPE_LINK_M1(cpu_transcoder), m_n.link_m); | |
814 | I915_WRITE(PIPE_LINK_N1(cpu_transcoder), m_n.link_n); | |
815 | } else if (HAS_PCH_SPLIT(dev)) { | |
816 | I915_WRITE(TRANSDATA_M1(pipe), TU_SIZE(m_n.tu) | m_n.gmch_m); | |
817 | I915_WRITE(TRANSDATA_N1(pipe), m_n.gmch_n); | |
818 | I915_WRITE(TRANSDPLINK_M1(pipe), m_n.link_m); | |
819 | I915_WRITE(TRANSDPLINK_N1(pipe), m_n.link_n); | |
820 | } else if (IS_VALLEYVIEW(dev)) { | |
821 | I915_WRITE(PIPE_DATA_M1(pipe), TU_SIZE(m_n.tu) | m_n.gmch_m); | |
822 | I915_WRITE(PIPE_DATA_N1(pipe), m_n.gmch_n); | |
823 | I915_WRITE(PIPE_LINK_M1(pipe), m_n.link_m); | |
824 | I915_WRITE(PIPE_LINK_N1(pipe), m_n.link_n); | |
825 | } else { | |
826 | I915_WRITE(PIPE_GMCH_DATA_M(pipe), | |
827 | TU_SIZE(m_n.tu) | m_n.gmch_m); | |
828 | I915_WRITE(PIPE_GMCH_DATA_N(pipe), m_n.gmch_n); | |
829 | I915_WRITE(PIPE_DP_LINK_M(pipe), m_n.link_m); | |
830 | I915_WRITE(PIPE_DP_LINK_N(pipe), m_n.link_n); | |
831 | } | |
832 | } | |
833 | ||
834 | void intel_dp_init_link_config(struct intel_dp *intel_dp) | |
835 | { | |
836 | memset(intel_dp->link_configuration, 0, DP_LINK_CONFIGURATION_SIZE); | |
837 | intel_dp->link_configuration[0] = intel_dp->link_bw; | |
838 | intel_dp->link_configuration[1] = intel_dp->lane_count; | |
839 | intel_dp->link_configuration[8] = DP_SET_ANSI_8B10B; | |
840 | /* | |
841 | * Check for DPCD version > 1.1 and enhanced framing support | |
842 | */ | |
843 | if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11 && | |
844 | (intel_dp->dpcd[DP_MAX_LANE_COUNT] & DP_ENHANCED_FRAME_CAP)) { | |
845 | intel_dp->link_configuration[1] |= DP_LANE_COUNT_ENHANCED_FRAME_EN; | |
846 | } | |
847 | } | |
848 | ||
849 | static void | |
850 | intel_dp_mode_set(struct drm_encoder *encoder, struct drm_display_mode *mode, | |
851 | struct drm_display_mode *adjusted_mode) | |
852 | { | |
853 | struct drm_device *dev = encoder->dev; | |
854 | struct drm_i915_private *dev_priv = dev->dev_private; | |
855 | struct intel_dp *intel_dp = enc_to_intel_dp(encoder); | |
856 | struct drm_crtc *crtc = encoder->crtc; | |
857 | struct intel_crtc *intel_crtc = to_intel_crtc(crtc); | |
858 | ||
859 | /* | |
860 | * There are four kinds of DP registers: | |
861 | * | |
862 | * IBX PCH | |
863 | * SNB CPU | |
864 | * IVB CPU | |
865 | * CPT PCH | |
866 | * | |
867 | * IBX PCH and CPU are the same for almost everything, | |
868 | * except that the CPU DP PLL is configured in this | |
869 | * register | |
870 | * | |
871 | * CPT PCH is quite different, having many bits moved | |
872 | * to the TRANS_DP_CTL register instead. That | |
873 | * configuration happens (oddly) in ironlake_pch_enable | |
874 | */ | |
875 | ||
876 | /* Preserve the BIOS-computed detected bit. This is | |
877 | * supposed to be read-only. | |
878 | */ | |
879 | intel_dp->DP = I915_READ(intel_dp->output_reg) & DP_DETECTED; | |
880 | ||
881 | /* Handle DP bits in common between all three register formats */ | |
882 | intel_dp->DP |= DP_VOLTAGE_0_4 | DP_PRE_EMPHASIS_0; | |
883 | ||
884 | switch (intel_dp->lane_count) { | |
885 | case 1: | |
886 | intel_dp->DP |= DP_PORT_WIDTH_1; | |
887 | break; | |
888 | case 2: | |
889 | intel_dp->DP |= DP_PORT_WIDTH_2; | |
890 | break; | |
891 | case 4: | |
892 | intel_dp->DP |= DP_PORT_WIDTH_4; | |
893 | break; | |
894 | } | |
895 | if (intel_dp->has_audio) { | |
896 | DRM_DEBUG_DRIVER("Enabling DP audio on pipe %c\n", | |
897 | pipe_name(intel_crtc->pipe)); | |
898 | intel_dp->DP |= DP_AUDIO_OUTPUT_ENABLE; | |
899 | intel_write_eld(encoder, adjusted_mode); | |
900 | } | |
901 | ||
902 | intel_dp_init_link_config(intel_dp); | |
903 | ||
904 | /* Split out the IBX/CPU vs CPT settings */ | |
905 | ||
906 | if (is_cpu_edp(intel_dp) && IS_GEN7(dev) && !IS_VALLEYVIEW(dev)) { | |
907 | if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC) | |
908 | intel_dp->DP |= DP_SYNC_HS_HIGH; | |
909 | if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC) | |
910 | intel_dp->DP |= DP_SYNC_VS_HIGH; | |
911 | intel_dp->DP |= DP_LINK_TRAIN_OFF_CPT; | |
912 | ||
913 | if (intel_dp->link_configuration[1] & DP_LANE_COUNT_ENHANCED_FRAME_EN) | |
914 | intel_dp->DP |= DP_ENHANCED_FRAMING; | |
915 | ||
916 | intel_dp->DP |= intel_crtc->pipe << 29; | |
917 | ||
918 | /* don't miss out required setting for eDP */ | |
919 | if (adjusted_mode->clock < 200000) | |
920 | intel_dp->DP |= DP_PLL_FREQ_160MHZ; | |
921 | else | |
922 | intel_dp->DP |= DP_PLL_FREQ_270MHZ; | |
923 | } else if (!HAS_PCH_CPT(dev) || is_cpu_edp(intel_dp)) { | |
924 | intel_dp->DP |= intel_dp->color_range; | |
925 | ||
926 | if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC) | |
927 | intel_dp->DP |= DP_SYNC_HS_HIGH; | |
928 | if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC) | |
929 | intel_dp->DP |= DP_SYNC_VS_HIGH; | |
930 | intel_dp->DP |= DP_LINK_TRAIN_OFF; | |
931 | ||
932 | if (intel_dp->link_configuration[1] & DP_LANE_COUNT_ENHANCED_FRAME_EN) | |
933 | intel_dp->DP |= DP_ENHANCED_FRAMING; | |
934 | ||
935 | if (intel_crtc->pipe == 1) | |
936 | intel_dp->DP |= DP_PIPEB_SELECT; | |
937 | ||
938 | if (is_cpu_edp(intel_dp)) { | |
939 | /* don't miss out required setting for eDP */ | |
940 | if (adjusted_mode->clock < 200000) | |
941 | intel_dp->DP |= DP_PLL_FREQ_160MHZ; | |
942 | else | |
943 | intel_dp->DP |= DP_PLL_FREQ_270MHZ; | |
944 | } | |
945 | } else { | |
946 | intel_dp->DP |= DP_LINK_TRAIN_OFF_CPT; | |
947 | } | |
948 | } | |
949 | ||
950 | #define IDLE_ON_MASK (PP_ON | 0 | PP_SEQUENCE_MASK | 0 | PP_SEQUENCE_STATE_MASK) | |
951 | #define IDLE_ON_VALUE (PP_ON | 0 | PP_SEQUENCE_NONE | 0 | PP_SEQUENCE_STATE_ON_IDLE) | |
952 | ||
953 | #define IDLE_OFF_MASK (PP_ON | 0 | PP_SEQUENCE_MASK | 0 | PP_SEQUENCE_STATE_MASK) | |
954 | #define IDLE_OFF_VALUE (0 | 0 | PP_SEQUENCE_NONE | 0 | PP_SEQUENCE_STATE_OFF_IDLE) | |
955 | ||
956 | #define IDLE_CYCLE_MASK (PP_ON | 0 | PP_SEQUENCE_MASK | PP_CYCLE_DELAY_ACTIVE | PP_SEQUENCE_STATE_MASK) | |
957 | #define IDLE_CYCLE_VALUE (0 | 0 | PP_SEQUENCE_NONE | 0 | PP_SEQUENCE_STATE_OFF_IDLE) | |
958 | ||
959 | static void ironlake_wait_panel_status(struct intel_dp *intel_dp, | |
960 | u32 mask, | |
961 | u32 value) | |
962 | { | |
963 | struct drm_device *dev = intel_dp_to_dev(intel_dp); | |
964 | struct drm_i915_private *dev_priv = dev->dev_private; | |
965 | ||
966 | DRM_DEBUG_KMS("mask %08x value %08x status %08x control %08x\n", | |
967 | mask, value, | |
968 | I915_READ(PCH_PP_STATUS), | |
969 | I915_READ(PCH_PP_CONTROL)); | |
970 | ||
971 | if (_wait_for((I915_READ(PCH_PP_STATUS) & mask) == value, 5000, 10)) { | |
972 | DRM_ERROR("Panel status timeout: status %08x control %08x\n", | |
973 | I915_READ(PCH_PP_STATUS), | |
974 | I915_READ(PCH_PP_CONTROL)); | |
975 | } | |
976 | } | |
977 | ||
978 | static void ironlake_wait_panel_on(struct intel_dp *intel_dp) | |
979 | { | |
980 | DRM_DEBUG_KMS("Wait for panel power on\n"); | |
981 | ironlake_wait_panel_status(intel_dp, IDLE_ON_MASK, IDLE_ON_VALUE); | |
982 | } | |
983 | ||
984 | static void ironlake_wait_panel_off(struct intel_dp *intel_dp) | |
985 | { | |
986 | DRM_DEBUG_KMS("Wait for panel power off time\n"); | |
987 | ironlake_wait_panel_status(intel_dp, IDLE_OFF_MASK, IDLE_OFF_VALUE); | |
988 | } | |
989 | ||
990 | static void ironlake_wait_panel_power_cycle(struct intel_dp *intel_dp) | |
991 | { | |
992 | DRM_DEBUG_KMS("Wait for panel power cycle\n"); | |
993 | ironlake_wait_panel_status(intel_dp, IDLE_CYCLE_MASK, IDLE_CYCLE_VALUE); | |
994 | } | |
995 | ||
996 | ||
997 | /* Read the current pp_control value, unlocking the register if it | |
998 | * is locked | |
999 | */ | |
1000 | ||
1001 | static u32 ironlake_get_pp_control(struct drm_i915_private *dev_priv) | |
1002 | { | |
1003 | u32 control = I915_READ(PCH_PP_CONTROL); | |
1004 | ||
1005 | control &= ~PANEL_UNLOCK_MASK; | |
1006 | control |= PANEL_UNLOCK_REGS; | |
1007 | return control; | |
1008 | } | |
1009 | ||
1010 | void ironlake_edp_panel_vdd_on(struct intel_dp *intel_dp) | |
1011 | { | |
1012 | struct drm_device *dev = intel_dp_to_dev(intel_dp); | |
1013 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1014 | u32 pp; | |
1015 | ||
1016 | if (!is_edp(intel_dp)) | |
1017 | return; | |
1018 | DRM_DEBUG_KMS("Turn eDP VDD on\n"); | |
1019 | ||
1020 | WARN(intel_dp->want_panel_vdd, | |
1021 | "eDP VDD already requested on\n"); | |
1022 | ||
1023 | intel_dp->want_panel_vdd = true; | |
1024 | ||
1025 | if (ironlake_edp_have_panel_vdd(intel_dp)) { | |
1026 | DRM_DEBUG_KMS("eDP VDD already on\n"); | |
1027 | return; | |
1028 | } | |
1029 | ||
1030 | if (!ironlake_edp_have_panel_power(intel_dp)) | |
1031 | ironlake_wait_panel_power_cycle(intel_dp); | |
1032 | ||
1033 | pp = ironlake_get_pp_control(dev_priv); | |
1034 | pp |= EDP_FORCE_VDD; | |
1035 | I915_WRITE(PCH_PP_CONTROL, pp); | |
1036 | POSTING_READ(PCH_PP_CONTROL); | |
1037 | DRM_DEBUG_KMS("PCH_PP_STATUS: 0x%08x PCH_PP_CONTROL: 0x%08x\n", | |
1038 | I915_READ(PCH_PP_STATUS), I915_READ(PCH_PP_CONTROL)); | |
1039 | ||
1040 | /* | |
1041 | * If the panel wasn't on, delay before accessing aux channel | |
1042 | */ | |
1043 | if (!ironlake_edp_have_panel_power(intel_dp)) { | |
1044 | DRM_DEBUG_KMS("eDP was not running\n"); | |
1045 | msleep(intel_dp->panel_power_up_delay); | |
1046 | } | |
1047 | } | |
1048 | ||
1049 | static void ironlake_panel_vdd_off_sync(struct intel_dp *intel_dp) | |
1050 | { | |
1051 | struct drm_device *dev = intel_dp_to_dev(intel_dp); | |
1052 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1053 | u32 pp; | |
1054 | ||
1055 | if (!intel_dp->want_panel_vdd && ironlake_edp_have_panel_vdd(intel_dp)) { | |
1056 | pp = ironlake_get_pp_control(dev_priv); | |
1057 | pp &= ~EDP_FORCE_VDD; | |
1058 | I915_WRITE(PCH_PP_CONTROL, pp); | |
1059 | POSTING_READ(PCH_PP_CONTROL); | |
1060 | ||
1061 | /* Make sure sequencer is idle before allowing subsequent activity */ | |
1062 | DRM_DEBUG_KMS("PCH_PP_STATUS: 0x%08x PCH_PP_CONTROL: 0x%08x\n", | |
1063 | I915_READ(PCH_PP_STATUS), I915_READ(PCH_PP_CONTROL)); | |
1064 | ||
1065 | msleep(intel_dp->panel_power_down_delay); | |
1066 | } | |
1067 | } | |
1068 | ||
1069 | static void ironlake_panel_vdd_work(struct work_struct *__work) | |
1070 | { | |
1071 | struct intel_dp *intel_dp = container_of(to_delayed_work(__work), | |
1072 | struct intel_dp, panel_vdd_work); | |
1073 | struct drm_device *dev = intel_dp_to_dev(intel_dp); | |
1074 | ||
1075 | mutex_lock(&dev->mode_config.mutex); | |
1076 | ironlake_panel_vdd_off_sync(intel_dp); | |
1077 | mutex_unlock(&dev->mode_config.mutex); | |
1078 | } | |
1079 | ||
1080 | void ironlake_edp_panel_vdd_off(struct intel_dp *intel_dp, bool sync) | |
1081 | { | |
1082 | if (!is_edp(intel_dp)) | |
1083 | return; | |
1084 | ||
1085 | DRM_DEBUG_KMS("Turn eDP VDD off %d\n", intel_dp->want_panel_vdd); | |
1086 | WARN(!intel_dp->want_panel_vdd, "eDP VDD not forced on"); | |
1087 | ||
1088 | intel_dp->want_panel_vdd = false; | |
1089 | ||
1090 | if (sync) { | |
1091 | ironlake_panel_vdd_off_sync(intel_dp); | |
1092 | } else { | |
1093 | /* | |
1094 | * Queue the timer to fire a long | |
1095 | * time from now (relative to the power down delay) | |
1096 | * to keep the panel power up across a sequence of operations | |
1097 | */ | |
1098 | schedule_delayed_work(&intel_dp->panel_vdd_work, | |
1099 | msecs_to_jiffies(intel_dp->panel_power_cycle_delay * 5)); | |
1100 | } | |
1101 | } | |
1102 | ||
1103 | void ironlake_edp_panel_on(struct intel_dp *intel_dp) | |
1104 | { | |
1105 | struct drm_device *dev = intel_dp_to_dev(intel_dp); | |
1106 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1107 | u32 pp; | |
1108 | ||
1109 | if (!is_edp(intel_dp)) | |
1110 | return; | |
1111 | ||
1112 | DRM_DEBUG_KMS("Turn eDP power on\n"); | |
1113 | ||
1114 | if (ironlake_edp_have_panel_power(intel_dp)) { | |
1115 | DRM_DEBUG_KMS("eDP power already on\n"); | |
1116 | return; | |
1117 | } | |
1118 | ||
1119 | ironlake_wait_panel_power_cycle(intel_dp); | |
1120 | ||
1121 | pp = ironlake_get_pp_control(dev_priv); | |
1122 | if (IS_GEN5(dev)) { | |
1123 | /* ILK workaround: disable reset around power sequence */ | |
1124 | pp &= ~PANEL_POWER_RESET; | |
1125 | I915_WRITE(PCH_PP_CONTROL, pp); | |
1126 | POSTING_READ(PCH_PP_CONTROL); | |
1127 | } | |
1128 | ||
1129 | pp |= POWER_TARGET_ON; | |
1130 | if (!IS_GEN5(dev)) | |
1131 | pp |= PANEL_POWER_RESET; | |
1132 | ||
1133 | I915_WRITE(PCH_PP_CONTROL, pp); | |
1134 | POSTING_READ(PCH_PP_CONTROL); | |
1135 | ||
1136 | ironlake_wait_panel_on(intel_dp); | |
1137 | ||
1138 | if (IS_GEN5(dev)) { | |
1139 | pp |= PANEL_POWER_RESET; /* restore panel reset bit */ | |
1140 | I915_WRITE(PCH_PP_CONTROL, pp); | |
1141 | POSTING_READ(PCH_PP_CONTROL); | |
1142 | } | |
1143 | } | |
1144 | ||
1145 | void ironlake_edp_panel_off(struct intel_dp *intel_dp) | |
1146 | { | |
1147 | struct drm_device *dev = intel_dp_to_dev(intel_dp); | |
1148 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1149 | u32 pp; | |
1150 | ||
1151 | if (!is_edp(intel_dp)) | |
1152 | return; | |
1153 | ||
1154 | DRM_DEBUG_KMS("Turn eDP power off\n"); | |
1155 | ||
1156 | WARN(!intel_dp->want_panel_vdd, "Need VDD to turn off panel\n"); | |
1157 | ||
1158 | pp = ironlake_get_pp_control(dev_priv); | |
1159 | /* We need to switch off panel power _and_ force vdd, for otherwise some | |
1160 | * panels get very unhappy and cease to work. */ | |
1161 | pp &= ~(POWER_TARGET_ON | EDP_FORCE_VDD | PANEL_POWER_RESET | EDP_BLC_ENABLE); | |
1162 | I915_WRITE(PCH_PP_CONTROL, pp); | |
1163 | POSTING_READ(PCH_PP_CONTROL); | |
1164 | ||
1165 | intel_dp->want_panel_vdd = false; | |
1166 | ||
1167 | ironlake_wait_panel_off(intel_dp); | |
1168 | } | |
1169 | ||
1170 | void ironlake_edp_backlight_on(struct intel_dp *intel_dp) | |
1171 | { | |
1172 | struct drm_device *dev = intel_dp_to_dev(intel_dp); | |
1173 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1174 | int pipe = to_intel_crtc(intel_dp->base.base.crtc)->pipe; | |
1175 | u32 pp; | |
1176 | ||
1177 | if (!is_edp(intel_dp)) | |
1178 | return; | |
1179 | ||
1180 | DRM_DEBUG_KMS("\n"); | |
1181 | /* | |
1182 | * If we enable the backlight right away following a panel power | |
1183 | * on, we may see slight flicker as the panel syncs with the eDP | |
1184 | * link. So delay a bit to make sure the image is solid before | |
1185 | * allowing it to appear. | |
1186 | */ | |
1187 | msleep(intel_dp->backlight_on_delay); | |
1188 | pp = ironlake_get_pp_control(dev_priv); | |
1189 | pp |= EDP_BLC_ENABLE; | |
1190 | I915_WRITE(PCH_PP_CONTROL, pp); | |
1191 | POSTING_READ(PCH_PP_CONTROL); | |
1192 | ||
1193 | intel_panel_enable_backlight(dev, pipe); | |
1194 | } | |
1195 | ||
1196 | void ironlake_edp_backlight_off(struct intel_dp *intel_dp) | |
1197 | { | |
1198 | struct drm_device *dev = intel_dp_to_dev(intel_dp); | |
1199 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1200 | u32 pp; | |
1201 | ||
1202 | if (!is_edp(intel_dp)) | |
1203 | return; | |
1204 | ||
1205 | intel_panel_disable_backlight(dev); | |
1206 | ||
1207 | DRM_DEBUG_KMS("\n"); | |
1208 | pp = ironlake_get_pp_control(dev_priv); | |
1209 | pp &= ~EDP_BLC_ENABLE; | |
1210 | I915_WRITE(PCH_PP_CONTROL, pp); | |
1211 | POSTING_READ(PCH_PP_CONTROL); | |
1212 | msleep(intel_dp->backlight_off_delay); | |
1213 | } | |
1214 | ||
1215 | static void ironlake_edp_pll_on(struct intel_dp *intel_dp) | |
1216 | { | |
1217 | struct drm_device *dev = intel_dp_to_dev(intel_dp); | |
1218 | struct drm_crtc *crtc = intel_dp->base.base.crtc; | |
1219 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1220 | u32 dpa_ctl; | |
1221 | ||
1222 | assert_pipe_disabled(dev_priv, | |
1223 | to_intel_crtc(crtc)->pipe); | |
1224 | ||
1225 | DRM_DEBUG_KMS("\n"); | |
1226 | dpa_ctl = I915_READ(DP_A); | |
1227 | WARN(dpa_ctl & DP_PLL_ENABLE, "dp pll on, should be off\n"); | |
1228 | WARN(dpa_ctl & DP_PORT_EN, "dp port still on, should be off\n"); | |
1229 | ||
1230 | /* We don't adjust intel_dp->DP while tearing down the link, to | |
1231 | * facilitate link retraining (e.g. after hotplug). Hence clear all | |
1232 | * enable bits here to ensure that we don't enable too much. */ | |
1233 | intel_dp->DP &= ~(DP_PORT_EN | DP_AUDIO_OUTPUT_ENABLE); | |
1234 | intel_dp->DP |= DP_PLL_ENABLE; | |
1235 | I915_WRITE(DP_A, intel_dp->DP); | |
1236 | POSTING_READ(DP_A); | |
1237 | udelay(200); | |
1238 | } | |
1239 | ||
1240 | static void ironlake_edp_pll_off(struct intel_dp *intel_dp) | |
1241 | { | |
1242 | struct drm_device *dev = intel_dp_to_dev(intel_dp); | |
1243 | struct drm_crtc *crtc = intel_dp->base.base.crtc; | |
1244 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1245 | u32 dpa_ctl; | |
1246 | ||
1247 | assert_pipe_disabled(dev_priv, | |
1248 | to_intel_crtc(crtc)->pipe); | |
1249 | ||
1250 | dpa_ctl = I915_READ(DP_A); | |
1251 | WARN((dpa_ctl & DP_PLL_ENABLE) == 0, | |
1252 | "dp pll off, should be on\n"); | |
1253 | WARN(dpa_ctl & DP_PORT_EN, "dp port still on, should be off\n"); | |
1254 | ||
1255 | /* We can't rely on the value tracked for the DP register in | |
1256 | * intel_dp->DP because link_down must not change that (otherwise link | |
1257 | * re-training will fail. */ | |
1258 | dpa_ctl &= ~DP_PLL_ENABLE; | |
1259 | I915_WRITE(DP_A, dpa_ctl); | |
1260 | POSTING_READ(DP_A); | |
1261 | udelay(200); | |
1262 | } | |
1263 | ||
1264 | /* If the sink supports it, try to set the power state appropriately */ | |
1265 | void intel_dp_sink_dpms(struct intel_dp *intel_dp, int mode) | |
1266 | { | |
1267 | int ret, i; | |
1268 | ||
1269 | /* Should have a valid DPCD by this point */ | |
1270 | if (intel_dp->dpcd[DP_DPCD_REV] < 0x11) | |
1271 | return; | |
1272 | ||
1273 | if (mode != DRM_MODE_DPMS_ON) { | |
1274 | ret = intel_dp_aux_native_write_1(intel_dp, DP_SET_POWER, | |
1275 | DP_SET_POWER_D3); | |
1276 | if (ret != 1) | |
1277 | DRM_DEBUG_DRIVER("failed to write sink power state\n"); | |
1278 | } else { | |
1279 | /* | |
1280 | * When turning on, we need to retry for 1ms to give the sink | |
1281 | * time to wake up. | |
1282 | */ | |
1283 | for (i = 0; i < 3; i++) { | |
1284 | ret = intel_dp_aux_native_write_1(intel_dp, | |
1285 | DP_SET_POWER, | |
1286 | DP_SET_POWER_D0); | |
1287 | if (ret == 1) | |
1288 | break; | |
1289 | msleep(1); | |
1290 | } | |
1291 | } | |
1292 | } | |
1293 | ||
1294 | static bool intel_dp_get_hw_state(struct intel_encoder *encoder, | |
1295 | enum pipe *pipe) | |
1296 | { | |
1297 | struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base); | |
1298 | struct drm_device *dev = encoder->base.dev; | |
1299 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1300 | u32 tmp = I915_READ(intel_dp->output_reg); | |
1301 | ||
1302 | if (!(tmp & DP_PORT_EN)) | |
1303 | return false; | |
1304 | ||
1305 | if (is_cpu_edp(intel_dp) && IS_GEN7(dev)) { | |
1306 | *pipe = PORT_TO_PIPE_CPT(tmp); | |
1307 | } else if (!HAS_PCH_CPT(dev) || is_cpu_edp(intel_dp)) { | |
1308 | *pipe = PORT_TO_PIPE(tmp); | |
1309 | } else { | |
1310 | u32 trans_sel; | |
1311 | u32 trans_dp; | |
1312 | int i; | |
1313 | ||
1314 | switch (intel_dp->output_reg) { | |
1315 | case PCH_DP_B: | |
1316 | trans_sel = TRANS_DP_PORT_SEL_B; | |
1317 | break; | |
1318 | case PCH_DP_C: | |
1319 | trans_sel = TRANS_DP_PORT_SEL_C; | |
1320 | break; | |
1321 | case PCH_DP_D: | |
1322 | trans_sel = TRANS_DP_PORT_SEL_D; | |
1323 | break; | |
1324 | default: | |
1325 | return true; | |
1326 | } | |
1327 | ||
1328 | for_each_pipe(i) { | |
1329 | trans_dp = I915_READ(TRANS_DP_CTL(i)); | |
1330 | if ((trans_dp & TRANS_DP_PORT_SEL_MASK) == trans_sel) { | |
1331 | *pipe = i; | |
1332 | return true; | |
1333 | } | |
1334 | } | |
1335 | ||
1336 | DRM_DEBUG_KMS("No pipe for dp port 0x%x found\n", | |
1337 | intel_dp->output_reg); | |
1338 | } | |
1339 | ||
1340 | return true; | |
1341 | } | |
1342 | ||
1343 | static void intel_disable_dp(struct intel_encoder *encoder) | |
1344 | { | |
1345 | struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base); | |
1346 | ||
1347 | /* Make sure the panel is off before trying to change the mode. But also | |
1348 | * ensure that we have vdd while we switch off the panel. */ | |
1349 | ironlake_edp_panel_vdd_on(intel_dp); | |
1350 | ironlake_edp_backlight_off(intel_dp); | |
1351 | intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON); | |
1352 | ironlake_edp_panel_off(intel_dp); | |
1353 | ||
1354 | /* cpu edp my only be disable _after_ the cpu pipe/plane is disabled. */ | |
1355 | if (!is_cpu_edp(intel_dp)) | |
1356 | intel_dp_link_down(intel_dp); | |
1357 | } | |
1358 | ||
1359 | static void intel_post_disable_dp(struct intel_encoder *encoder) | |
1360 | { | |
1361 | struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base); | |
1362 | ||
1363 | if (is_cpu_edp(intel_dp)) { | |
1364 | intel_dp_link_down(intel_dp); | |
1365 | ironlake_edp_pll_off(intel_dp); | |
1366 | } | |
1367 | } | |
1368 | ||
1369 | static void intel_enable_dp(struct intel_encoder *encoder) | |
1370 | { | |
1371 | struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base); | |
1372 | struct drm_device *dev = encoder->base.dev; | |
1373 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1374 | uint32_t dp_reg = I915_READ(intel_dp->output_reg); | |
1375 | ||
1376 | if (WARN_ON(dp_reg & DP_PORT_EN)) | |
1377 | return; | |
1378 | ||
1379 | ironlake_edp_panel_vdd_on(intel_dp); | |
1380 | intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON); | |
1381 | intel_dp_start_link_train(intel_dp); | |
1382 | ironlake_edp_panel_on(intel_dp); | |
1383 | ironlake_edp_panel_vdd_off(intel_dp, true); | |
1384 | intel_dp_complete_link_train(intel_dp); | |
1385 | ironlake_edp_backlight_on(intel_dp); | |
1386 | } | |
1387 | ||
1388 | static void intel_pre_enable_dp(struct intel_encoder *encoder) | |
1389 | { | |
1390 | struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base); | |
1391 | ||
1392 | if (is_cpu_edp(intel_dp)) | |
1393 | ironlake_edp_pll_on(intel_dp); | |
1394 | } | |
1395 | ||
1396 | /* | |
1397 | * Native read with retry for link status and receiver capability reads for | |
1398 | * cases where the sink may still be asleep. | |
1399 | */ | |
1400 | static bool | |
1401 | intel_dp_aux_native_read_retry(struct intel_dp *intel_dp, uint16_t address, | |
1402 | uint8_t *recv, int recv_bytes) | |
1403 | { | |
1404 | int ret, i; | |
1405 | ||
1406 | /* | |
1407 | * Sinks are *supposed* to come up within 1ms from an off state, | |
1408 | * but we're also supposed to retry 3 times per the spec. | |
1409 | */ | |
1410 | for (i = 0; i < 3; i++) { | |
1411 | ret = intel_dp_aux_native_read(intel_dp, address, recv, | |
1412 | recv_bytes); | |
1413 | if (ret == recv_bytes) | |
1414 | return true; | |
1415 | msleep(1); | |
1416 | } | |
1417 | ||
1418 | return false; | |
1419 | } | |
1420 | ||
1421 | /* | |
1422 | * Fetch AUX CH registers 0x202 - 0x207 which contain | |
1423 | * link status information | |
1424 | */ | |
1425 | static bool | |
1426 | intel_dp_get_link_status(struct intel_dp *intel_dp, uint8_t link_status[DP_LINK_STATUS_SIZE]) | |
1427 | { | |
1428 | return intel_dp_aux_native_read_retry(intel_dp, | |
1429 | DP_LANE0_1_STATUS, | |
1430 | link_status, | |
1431 | DP_LINK_STATUS_SIZE); | |
1432 | } | |
1433 | ||
1434 | #if 0 | |
1435 | static char *voltage_names[] = { | |
1436 | "0.4V", "0.6V", "0.8V", "1.2V" | |
1437 | }; | |
1438 | static char *pre_emph_names[] = { | |
1439 | "0dB", "3.5dB", "6dB", "9.5dB" | |
1440 | }; | |
1441 | static char *link_train_names[] = { | |
1442 | "pattern 1", "pattern 2", "idle", "off" | |
1443 | }; | |
1444 | #endif | |
1445 | ||
1446 | /* | |
1447 | * These are source-specific values; current Intel hardware supports | |
1448 | * a maximum voltage of 800mV and a maximum pre-emphasis of 6dB | |
1449 | */ | |
1450 | ||
1451 | static uint8_t | |
1452 | intel_dp_voltage_max(struct intel_dp *intel_dp) | |
1453 | { | |
1454 | struct drm_device *dev = intel_dp_to_dev(intel_dp); | |
1455 | ||
1456 | if (IS_GEN7(dev) && is_cpu_edp(intel_dp)) | |
1457 | return DP_TRAIN_VOLTAGE_SWING_800; | |
1458 | else if (HAS_PCH_CPT(dev) && !is_cpu_edp(intel_dp)) | |
1459 | return DP_TRAIN_VOLTAGE_SWING_1200; | |
1460 | else | |
1461 | return DP_TRAIN_VOLTAGE_SWING_800; | |
1462 | } | |
1463 | ||
1464 | static uint8_t | |
1465 | intel_dp_pre_emphasis_max(struct intel_dp *intel_dp, uint8_t voltage_swing) | |
1466 | { | |
1467 | struct drm_device *dev = intel_dp_to_dev(intel_dp); | |
1468 | ||
1469 | if (IS_HASWELL(dev)) { | |
1470 | switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) { | |
1471 | case DP_TRAIN_VOLTAGE_SWING_400: | |
1472 | return DP_TRAIN_PRE_EMPHASIS_9_5; | |
1473 | case DP_TRAIN_VOLTAGE_SWING_600: | |
1474 | return DP_TRAIN_PRE_EMPHASIS_6; | |
1475 | case DP_TRAIN_VOLTAGE_SWING_800: | |
1476 | return DP_TRAIN_PRE_EMPHASIS_3_5; | |
1477 | case DP_TRAIN_VOLTAGE_SWING_1200: | |
1478 | default: | |
1479 | return DP_TRAIN_PRE_EMPHASIS_0; | |
1480 | } | |
1481 | } else if (IS_GEN7(dev) && is_cpu_edp(intel_dp) && !IS_VALLEYVIEW(dev)) { | |
1482 | switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) { | |
1483 | case DP_TRAIN_VOLTAGE_SWING_400: | |
1484 | return DP_TRAIN_PRE_EMPHASIS_6; | |
1485 | case DP_TRAIN_VOLTAGE_SWING_600: | |
1486 | case DP_TRAIN_VOLTAGE_SWING_800: | |
1487 | return DP_TRAIN_PRE_EMPHASIS_3_5; | |
1488 | default: | |
1489 | return DP_TRAIN_PRE_EMPHASIS_0; | |
1490 | } | |
1491 | } else { | |
1492 | switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) { | |
1493 | case DP_TRAIN_VOLTAGE_SWING_400: | |
1494 | return DP_TRAIN_PRE_EMPHASIS_6; | |
1495 | case DP_TRAIN_VOLTAGE_SWING_600: | |
1496 | return DP_TRAIN_PRE_EMPHASIS_6; | |
1497 | case DP_TRAIN_VOLTAGE_SWING_800: | |
1498 | return DP_TRAIN_PRE_EMPHASIS_3_5; | |
1499 | case DP_TRAIN_VOLTAGE_SWING_1200: | |
1500 | default: | |
1501 | return DP_TRAIN_PRE_EMPHASIS_0; | |
1502 | } | |
1503 | } | |
1504 | } | |
1505 | ||
1506 | static void | |
1507 | intel_get_adjust_train(struct intel_dp *intel_dp, uint8_t link_status[DP_LINK_STATUS_SIZE]) | |
1508 | { | |
1509 | uint8_t v = 0; | |
1510 | uint8_t p = 0; | |
1511 | int lane; | |
1512 | uint8_t voltage_max; | |
1513 | uint8_t preemph_max; | |
1514 | ||
1515 | for (lane = 0; lane < intel_dp->lane_count; lane++) { | |
1516 | uint8_t this_v = drm_dp_get_adjust_request_voltage(link_status, lane); | |
1517 | uint8_t this_p = drm_dp_get_adjust_request_pre_emphasis(link_status, lane); | |
1518 | ||
1519 | if (this_v > v) | |
1520 | v = this_v; | |
1521 | if (this_p > p) | |
1522 | p = this_p; | |
1523 | } | |
1524 | ||
1525 | voltage_max = intel_dp_voltage_max(intel_dp); | |
1526 | if (v >= voltage_max) | |
1527 | v = voltage_max | DP_TRAIN_MAX_SWING_REACHED; | |
1528 | ||
1529 | preemph_max = intel_dp_pre_emphasis_max(intel_dp, v); | |
1530 | if (p >= preemph_max) | |
1531 | p = preemph_max | DP_TRAIN_MAX_PRE_EMPHASIS_REACHED; | |
1532 | ||
1533 | for (lane = 0; lane < 4; lane++) | |
1534 | intel_dp->train_set[lane] = v | p; | |
1535 | } | |
1536 | ||
1537 | static uint32_t | |
1538 | intel_dp_signal_levels(uint8_t train_set) | |
1539 | { | |
1540 | uint32_t signal_levels = 0; | |
1541 | ||
1542 | switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) { | |
1543 | case DP_TRAIN_VOLTAGE_SWING_400: | |
1544 | default: | |
1545 | signal_levels |= DP_VOLTAGE_0_4; | |
1546 | break; | |
1547 | case DP_TRAIN_VOLTAGE_SWING_600: | |
1548 | signal_levels |= DP_VOLTAGE_0_6; | |
1549 | break; | |
1550 | case DP_TRAIN_VOLTAGE_SWING_800: | |
1551 | signal_levels |= DP_VOLTAGE_0_8; | |
1552 | break; | |
1553 | case DP_TRAIN_VOLTAGE_SWING_1200: | |
1554 | signal_levels |= DP_VOLTAGE_1_2; | |
1555 | break; | |
1556 | } | |
1557 | switch (train_set & DP_TRAIN_PRE_EMPHASIS_MASK) { | |
1558 | case DP_TRAIN_PRE_EMPHASIS_0: | |
1559 | default: | |
1560 | signal_levels |= DP_PRE_EMPHASIS_0; | |
1561 | break; | |
1562 | case DP_TRAIN_PRE_EMPHASIS_3_5: | |
1563 | signal_levels |= DP_PRE_EMPHASIS_3_5; | |
1564 | break; | |
1565 | case DP_TRAIN_PRE_EMPHASIS_6: | |
1566 | signal_levels |= DP_PRE_EMPHASIS_6; | |
1567 | break; | |
1568 | case DP_TRAIN_PRE_EMPHASIS_9_5: | |
1569 | signal_levels |= DP_PRE_EMPHASIS_9_5; | |
1570 | break; | |
1571 | } | |
1572 | return signal_levels; | |
1573 | } | |
1574 | ||
1575 | /* Gen6's DP voltage swing and pre-emphasis control */ | |
1576 | static uint32_t | |
1577 | intel_gen6_edp_signal_levels(uint8_t train_set) | |
1578 | { | |
1579 | int signal_levels = train_set & (DP_TRAIN_VOLTAGE_SWING_MASK | | |
1580 | DP_TRAIN_PRE_EMPHASIS_MASK); | |
1581 | switch (signal_levels) { | |
1582 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_0: | |
1583 | case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_0: | |
1584 | return EDP_LINK_TRAIN_400_600MV_0DB_SNB_B; | |
1585 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_3_5: | |
1586 | return EDP_LINK_TRAIN_400MV_3_5DB_SNB_B; | |
1587 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_6: | |
1588 | case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_6: | |
1589 | return EDP_LINK_TRAIN_400_600MV_6DB_SNB_B; | |
1590 | case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_3_5: | |
1591 | case DP_TRAIN_VOLTAGE_SWING_800 | DP_TRAIN_PRE_EMPHASIS_3_5: | |
1592 | return EDP_LINK_TRAIN_600_800MV_3_5DB_SNB_B; | |
1593 | case DP_TRAIN_VOLTAGE_SWING_800 | DP_TRAIN_PRE_EMPHASIS_0: | |
1594 | case DP_TRAIN_VOLTAGE_SWING_1200 | DP_TRAIN_PRE_EMPHASIS_0: | |
1595 | return EDP_LINK_TRAIN_800_1200MV_0DB_SNB_B; | |
1596 | default: | |
1597 | DRM_DEBUG_KMS("Unsupported voltage swing/pre-emphasis level:" | |
1598 | "0x%x\n", signal_levels); | |
1599 | return EDP_LINK_TRAIN_400_600MV_0DB_SNB_B; | |
1600 | } | |
1601 | } | |
1602 | ||
1603 | /* Gen7's DP voltage swing and pre-emphasis control */ | |
1604 | static uint32_t | |
1605 | intel_gen7_edp_signal_levels(uint8_t train_set) | |
1606 | { | |
1607 | int signal_levels = train_set & (DP_TRAIN_VOLTAGE_SWING_MASK | | |
1608 | DP_TRAIN_PRE_EMPHASIS_MASK); | |
1609 | switch (signal_levels) { | |
1610 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_0: | |
1611 | return EDP_LINK_TRAIN_400MV_0DB_IVB; | |
1612 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_3_5: | |
1613 | return EDP_LINK_TRAIN_400MV_3_5DB_IVB; | |
1614 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_6: | |
1615 | return EDP_LINK_TRAIN_400MV_6DB_IVB; | |
1616 | ||
1617 | case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_0: | |
1618 | return EDP_LINK_TRAIN_600MV_0DB_IVB; | |
1619 | case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_3_5: | |
1620 | return EDP_LINK_TRAIN_600MV_3_5DB_IVB; | |
1621 | ||
1622 | case DP_TRAIN_VOLTAGE_SWING_800 | DP_TRAIN_PRE_EMPHASIS_0: | |
1623 | return EDP_LINK_TRAIN_800MV_0DB_IVB; | |
1624 | case DP_TRAIN_VOLTAGE_SWING_800 | DP_TRAIN_PRE_EMPHASIS_3_5: | |
1625 | return EDP_LINK_TRAIN_800MV_3_5DB_IVB; | |
1626 | ||
1627 | default: | |
1628 | DRM_DEBUG_KMS("Unsupported voltage swing/pre-emphasis level:" | |
1629 | "0x%x\n", signal_levels); | |
1630 | return EDP_LINK_TRAIN_500MV_0DB_IVB; | |
1631 | } | |
1632 | } | |
1633 | ||
1634 | /* Gen7.5's (HSW) DP voltage swing and pre-emphasis control */ | |
1635 | static uint32_t | |
1636 | intel_dp_signal_levels_hsw(uint8_t train_set) | |
1637 | { | |
1638 | int signal_levels = train_set & (DP_TRAIN_VOLTAGE_SWING_MASK | | |
1639 | DP_TRAIN_PRE_EMPHASIS_MASK); | |
1640 | switch (signal_levels) { | |
1641 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_0: | |
1642 | return DDI_BUF_EMP_400MV_0DB_HSW; | |
1643 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_3_5: | |
1644 | return DDI_BUF_EMP_400MV_3_5DB_HSW; | |
1645 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_6: | |
1646 | return DDI_BUF_EMP_400MV_6DB_HSW; | |
1647 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_9_5: | |
1648 | return DDI_BUF_EMP_400MV_9_5DB_HSW; | |
1649 | ||
1650 | case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_0: | |
1651 | return DDI_BUF_EMP_600MV_0DB_HSW; | |
1652 | case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_3_5: | |
1653 | return DDI_BUF_EMP_600MV_3_5DB_HSW; | |
1654 | case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_6: | |
1655 | return DDI_BUF_EMP_600MV_6DB_HSW; | |
1656 | ||
1657 | case DP_TRAIN_VOLTAGE_SWING_800 | DP_TRAIN_PRE_EMPHASIS_0: | |
1658 | return DDI_BUF_EMP_800MV_0DB_HSW; | |
1659 | case DP_TRAIN_VOLTAGE_SWING_800 | DP_TRAIN_PRE_EMPHASIS_3_5: | |
1660 | return DDI_BUF_EMP_800MV_3_5DB_HSW; | |
1661 | default: | |
1662 | DRM_DEBUG_KMS("Unsupported voltage swing/pre-emphasis level:" | |
1663 | "0x%x\n", signal_levels); | |
1664 | return DDI_BUF_EMP_400MV_0DB_HSW; | |
1665 | } | |
1666 | } | |
1667 | ||
1668 | static bool | |
1669 | intel_dp_set_link_train(struct intel_dp *intel_dp, | |
1670 | uint32_t dp_reg_value, | |
1671 | uint8_t dp_train_pat) | |
1672 | { | |
1673 | struct drm_device *dev = intel_dp_to_dev(intel_dp); | |
1674 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1675 | int ret; | |
1676 | uint32_t temp; | |
1677 | ||
1678 | if (IS_HASWELL(dev)) { | |
1679 | temp = I915_READ(DP_TP_CTL(intel_dp->port)); | |
1680 | ||
1681 | if (dp_train_pat & DP_LINK_SCRAMBLING_DISABLE) | |
1682 | temp |= DP_TP_CTL_SCRAMBLE_DISABLE; | |
1683 | else | |
1684 | temp &= ~DP_TP_CTL_SCRAMBLE_DISABLE; | |
1685 | ||
1686 | temp &= ~DP_TP_CTL_LINK_TRAIN_MASK; | |
1687 | switch (dp_train_pat & DP_TRAINING_PATTERN_MASK) { | |
1688 | case DP_TRAINING_PATTERN_DISABLE: | |
1689 | temp |= DP_TP_CTL_LINK_TRAIN_IDLE; | |
1690 | I915_WRITE(DP_TP_CTL(intel_dp->port), temp); | |
1691 | ||
1692 | if (wait_for((I915_READ(DP_TP_STATUS(intel_dp->port)) & | |
1693 | DP_TP_STATUS_IDLE_DONE), 1)) | |
1694 | DRM_ERROR("Timed out waiting for DP idle patterns\n"); | |
1695 | ||
1696 | temp &= ~DP_TP_CTL_LINK_TRAIN_MASK; | |
1697 | temp |= DP_TP_CTL_LINK_TRAIN_NORMAL; | |
1698 | ||
1699 | break; | |
1700 | case DP_TRAINING_PATTERN_1: | |
1701 | temp |= DP_TP_CTL_LINK_TRAIN_PAT1; | |
1702 | break; | |
1703 | case DP_TRAINING_PATTERN_2: | |
1704 | temp |= DP_TP_CTL_LINK_TRAIN_PAT2; | |
1705 | break; | |
1706 | case DP_TRAINING_PATTERN_3: | |
1707 | temp |= DP_TP_CTL_LINK_TRAIN_PAT3; | |
1708 | break; | |
1709 | } | |
1710 | I915_WRITE(DP_TP_CTL(intel_dp->port), temp); | |
1711 | ||
1712 | } else if (HAS_PCH_CPT(dev) && | |
1713 | (IS_GEN7(dev) || !is_cpu_edp(intel_dp))) { | |
1714 | dp_reg_value &= ~DP_LINK_TRAIN_MASK_CPT; | |
1715 | ||
1716 | switch (dp_train_pat & DP_TRAINING_PATTERN_MASK) { | |
1717 | case DP_TRAINING_PATTERN_DISABLE: | |
1718 | dp_reg_value |= DP_LINK_TRAIN_OFF_CPT; | |
1719 | break; | |
1720 | case DP_TRAINING_PATTERN_1: | |
1721 | dp_reg_value |= DP_LINK_TRAIN_PAT_1_CPT; | |
1722 | break; | |
1723 | case DP_TRAINING_PATTERN_2: | |
1724 | dp_reg_value |= DP_LINK_TRAIN_PAT_2_CPT; | |
1725 | break; | |
1726 | case DP_TRAINING_PATTERN_3: | |
1727 | DRM_ERROR("DP training pattern 3 not supported\n"); | |
1728 | dp_reg_value |= DP_LINK_TRAIN_PAT_2_CPT; | |
1729 | break; | |
1730 | } | |
1731 | ||
1732 | } else { | |
1733 | dp_reg_value &= ~DP_LINK_TRAIN_MASK; | |
1734 | ||
1735 | switch (dp_train_pat & DP_TRAINING_PATTERN_MASK) { | |
1736 | case DP_TRAINING_PATTERN_DISABLE: | |
1737 | dp_reg_value |= DP_LINK_TRAIN_OFF; | |
1738 | break; | |
1739 | case DP_TRAINING_PATTERN_1: | |
1740 | dp_reg_value |= DP_LINK_TRAIN_PAT_1; | |
1741 | break; | |
1742 | case DP_TRAINING_PATTERN_2: | |
1743 | dp_reg_value |= DP_LINK_TRAIN_PAT_2; | |
1744 | break; | |
1745 | case DP_TRAINING_PATTERN_3: | |
1746 | DRM_ERROR("DP training pattern 3 not supported\n"); | |
1747 | dp_reg_value |= DP_LINK_TRAIN_PAT_2; | |
1748 | break; | |
1749 | } | |
1750 | } | |
1751 | ||
1752 | I915_WRITE(intel_dp->output_reg, dp_reg_value); | |
1753 | POSTING_READ(intel_dp->output_reg); | |
1754 | ||
1755 | intel_dp_aux_native_write_1(intel_dp, | |
1756 | DP_TRAINING_PATTERN_SET, | |
1757 | dp_train_pat); | |
1758 | ||
1759 | if ((dp_train_pat & DP_TRAINING_PATTERN_MASK) != | |
1760 | DP_TRAINING_PATTERN_DISABLE) { | |
1761 | ret = intel_dp_aux_native_write(intel_dp, | |
1762 | DP_TRAINING_LANE0_SET, | |
1763 | intel_dp->train_set, | |
1764 | intel_dp->lane_count); | |
1765 | if (ret != intel_dp->lane_count) | |
1766 | return false; | |
1767 | } | |
1768 | ||
1769 | return true; | |
1770 | } | |
1771 | ||
1772 | /* Enable corresponding port and start training pattern 1 */ | |
1773 | void | |
1774 | intel_dp_start_link_train(struct intel_dp *intel_dp) | |
1775 | { | |
1776 | struct drm_encoder *encoder = &intel_dp->base.base; | |
1777 | struct drm_device *dev = encoder->dev; | |
1778 | int i; | |
1779 | uint8_t voltage; | |
1780 | bool clock_recovery = false; | |
1781 | int voltage_tries, loop_tries; | |
1782 | uint32_t DP = intel_dp->DP; | |
1783 | ||
1784 | if (IS_HASWELL(dev)) | |
1785 | intel_ddi_prepare_link_retrain(encoder); | |
1786 | ||
1787 | /* Write the link configuration data */ | |
1788 | intel_dp_aux_native_write(intel_dp, DP_LINK_BW_SET, | |
1789 | intel_dp->link_configuration, | |
1790 | DP_LINK_CONFIGURATION_SIZE); | |
1791 | ||
1792 | DP |= DP_PORT_EN; | |
1793 | ||
1794 | memset(intel_dp->train_set, 0, 4); | |
1795 | voltage = 0xff; | |
1796 | voltage_tries = 0; | |
1797 | loop_tries = 0; | |
1798 | clock_recovery = false; | |
1799 | for (;;) { | |
1800 | /* Use intel_dp->train_set[0] to set the voltage and pre emphasis values */ | |
1801 | uint8_t link_status[DP_LINK_STATUS_SIZE]; | |
1802 | uint32_t signal_levels; | |
1803 | ||
1804 | if (IS_HASWELL(dev)) { | |
1805 | signal_levels = intel_dp_signal_levels_hsw( | |
1806 | intel_dp->train_set[0]); | |
1807 | DP = (DP & ~DDI_BUF_EMP_MASK) | signal_levels; | |
1808 | } else if (IS_GEN7(dev) && is_cpu_edp(intel_dp) && !IS_VALLEYVIEW(dev)) { | |
1809 | signal_levels = intel_gen7_edp_signal_levels(intel_dp->train_set[0]); | |
1810 | DP = (DP & ~EDP_LINK_TRAIN_VOL_EMP_MASK_IVB) | signal_levels; | |
1811 | } else if (IS_GEN6(dev) && is_cpu_edp(intel_dp)) { | |
1812 | signal_levels = intel_gen6_edp_signal_levels(intel_dp->train_set[0]); | |
1813 | DP = (DP & ~EDP_LINK_TRAIN_VOL_EMP_MASK_SNB) | signal_levels; | |
1814 | } else { | |
1815 | signal_levels = intel_dp_signal_levels(intel_dp->train_set[0]); | |
1816 | DP = (DP & ~(DP_VOLTAGE_MASK|DP_PRE_EMPHASIS_MASK)) | signal_levels; | |
1817 | } | |
1818 | DRM_DEBUG_KMS("training pattern 1 signal levels %08x\n", | |
1819 | signal_levels); | |
1820 | ||
1821 | /* Set training pattern 1 */ | |
1822 | if (!intel_dp_set_link_train(intel_dp, DP, | |
1823 | DP_TRAINING_PATTERN_1 | | |
1824 | DP_LINK_SCRAMBLING_DISABLE)) | |
1825 | break; | |
1826 | ||
1827 | drm_dp_link_train_clock_recovery_delay(intel_dp->dpcd); | |
1828 | if (!intel_dp_get_link_status(intel_dp, link_status)) { | |
1829 | DRM_ERROR("failed to get link status\n"); | |
1830 | break; | |
1831 | } | |
1832 | ||
1833 | if (drm_dp_clock_recovery_ok(link_status, intel_dp->lane_count)) { | |
1834 | DRM_DEBUG_KMS("clock recovery OK\n"); | |
1835 | clock_recovery = true; | |
1836 | break; | |
1837 | } | |
1838 | ||
1839 | /* Check to see if we've tried the max voltage */ | |
1840 | for (i = 0; i < intel_dp->lane_count; i++) | |
1841 | if ((intel_dp->train_set[i] & DP_TRAIN_MAX_SWING_REACHED) == 0) | |
1842 | break; | |
1843 | if (i == intel_dp->lane_count && voltage_tries == 5) { | |
1844 | if (++loop_tries == 5) { | |
1845 | DRM_DEBUG_KMS("too many full retries, give up\n"); | |
1846 | break; | |
1847 | } | |
1848 | memset(intel_dp->train_set, 0, 4); | |
1849 | voltage_tries = 0; | |
1850 | continue; | |
1851 | } | |
1852 | ||
1853 | /* Check to see if we've tried the same voltage 5 times */ | |
1854 | if ((intel_dp->train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK) != voltage) { | |
1855 | voltage = intel_dp->train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK; | |
1856 | voltage_tries = 0; | |
1857 | } else | |
1858 | ++voltage_tries; | |
1859 | ||
1860 | /* Compute new intel_dp->train_set as requested by target */ | |
1861 | intel_get_adjust_train(intel_dp, link_status); | |
1862 | } | |
1863 | ||
1864 | intel_dp->DP = DP; | |
1865 | } | |
1866 | ||
1867 | void | |
1868 | intel_dp_complete_link_train(struct intel_dp *intel_dp) | |
1869 | { | |
1870 | struct drm_device *dev = intel_dp_to_dev(intel_dp); | |
1871 | bool channel_eq = false; | |
1872 | int tries, cr_tries; | |
1873 | uint32_t DP = intel_dp->DP; | |
1874 | ||
1875 | /* channel equalization */ | |
1876 | tries = 0; | |
1877 | cr_tries = 0; | |
1878 | channel_eq = false; | |
1879 | for (;;) { | |
1880 | /* Use intel_dp->train_set[0] to set the voltage and pre emphasis values */ | |
1881 | uint32_t signal_levels; | |
1882 | uint8_t link_status[DP_LINK_STATUS_SIZE]; | |
1883 | ||
1884 | if (cr_tries > 5) { | |
1885 | DRM_ERROR("failed to train DP, aborting\n"); | |
1886 | intel_dp_link_down(intel_dp); | |
1887 | break; | |
1888 | } | |
1889 | ||
1890 | if (IS_HASWELL(dev)) { | |
1891 | signal_levels = intel_dp_signal_levels_hsw(intel_dp->train_set[0]); | |
1892 | DP = (DP & ~DDI_BUF_EMP_MASK) | signal_levels; | |
1893 | } else if (IS_GEN7(dev) && is_cpu_edp(intel_dp) && !IS_VALLEYVIEW(dev)) { | |
1894 | signal_levels = intel_gen7_edp_signal_levels(intel_dp->train_set[0]); | |
1895 | DP = (DP & ~EDP_LINK_TRAIN_VOL_EMP_MASK_IVB) | signal_levels; | |
1896 | } else if (IS_GEN6(dev) && is_cpu_edp(intel_dp)) { | |
1897 | signal_levels = intel_gen6_edp_signal_levels(intel_dp->train_set[0]); | |
1898 | DP = (DP & ~EDP_LINK_TRAIN_VOL_EMP_MASK_SNB) | signal_levels; | |
1899 | } else { | |
1900 | signal_levels = intel_dp_signal_levels(intel_dp->train_set[0]); | |
1901 | DP = (DP & ~(DP_VOLTAGE_MASK|DP_PRE_EMPHASIS_MASK)) | signal_levels; | |
1902 | } | |
1903 | ||
1904 | /* channel eq pattern */ | |
1905 | if (!intel_dp_set_link_train(intel_dp, DP, | |
1906 | DP_TRAINING_PATTERN_2 | | |
1907 | DP_LINK_SCRAMBLING_DISABLE)) | |
1908 | break; | |
1909 | ||
1910 | drm_dp_link_train_channel_eq_delay(intel_dp->dpcd); | |
1911 | if (!intel_dp_get_link_status(intel_dp, link_status)) | |
1912 | break; | |
1913 | ||
1914 | /* Make sure clock is still ok */ | |
1915 | if (!drm_dp_clock_recovery_ok(link_status, intel_dp->lane_count)) { | |
1916 | intel_dp_start_link_train(intel_dp); | |
1917 | cr_tries++; | |
1918 | continue; | |
1919 | } | |
1920 | ||
1921 | if (drm_dp_channel_eq_ok(link_status, intel_dp->lane_count)) { | |
1922 | channel_eq = true; | |
1923 | break; | |
1924 | } | |
1925 | ||
1926 | /* Try 5 times, then try clock recovery if that fails */ | |
1927 | if (tries > 5) { | |
1928 | intel_dp_link_down(intel_dp); | |
1929 | intel_dp_start_link_train(intel_dp); | |
1930 | tries = 0; | |
1931 | cr_tries++; | |
1932 | continue; | |
1933 | } | |
1934 | ||
1935 | /* Compute new intel_dp->train_set as requested by target */ | |
1936 | intel_get_adjust_train(intel_dp, link_status); | |
1937 | ++tries; | |
1938 | } | |
1939 | ||
1940 | if (channel_eq) | |
1941 | DRM_DEBUG_KMS("Channel EQ done. DP Training successfull\n"); | |
1942 | ||
1943 | intel_dp_set_link_train(intel_dp, DP, DP_TRAINING_PATTERN_DISABLE); | |
1944 | } | |
1945 | ||
1946 | static void | |
1947 | intel_dp_link_down(struct intel_dp *intel_dp) | |
1948 | { | |
1949 | struct drm_device *dev = intel_dp_to_dev(intel_dp); | |
1950 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1951 | uint32_t DP = intel_dp->DP; | |
1952 | ||
1953 | /* | |
1954 | * DDI code has a strict mode set sequence and we should try to respect | |
1955 | * it, otherwise we might hang the machine in many different ways. So we | |
1956 | * really should be disabling the port only on a complete crtc_disable | |
1957 | * sequence. This function is just called under two conditions on DDI | |
1958 | * code: | |
1959 | * - Link train failed while doing crtc_enable, and on this case we | |
1960 | * really should respect the mode set sequence and wait for a | |
1961 | * crtc_disable. | |
1962 | * - Someone turned the monitor off and intel_dp_check_link_status | |
1963 | * called us. We don't need to disable the whole port on this case, so | |
1964 | * when someone turns the monitor on again, | |
1965 | * intel_ddi_prepare_link_retrain will take care of redoing the link | |
1966 | * train. | |
1967 | */ | |
1968 | if (IS_HASWELL(dev)) | |
1969 | return; | |
1970 | ||
1971 | if (WARN_ON((I915_READ(intel_dp->output_reg) & DP_PORT_EN) == 0)) | |
1972 | return; | |
1973 | ||
1974 | DRM_DEBUG_KMS("\n"); | |
1975 | ||
1976 | if (HAS_PCH_CPT(dev) && (IS_GEN7(dev) || !is_cpu_edp(intel_dp))) { | |
1977 | DP &= ~DP_LINK_TRAIN_MASK_CPT; | |
1978 | I915_WRITE(intel_dp->output_reg, DP | DP_LINK_TRAIN_PAT_IDLE_CPT); | |
1979 | } else { | |
1980 | DP &= ~DP_LINK_TRAIN_MASK; | |
1981 | I915_WRITE(intel_dp->output_reg, DP | DP_LINK_TRAIN_PAT_IDLE); | |
1982 | } | |
1983 | POSTING_READ(intel_dp->output_reg); | |
1984 | ||
1985 | msleep(17); | |
1986 | ||
1987 | if (HAS_PCH_IBX(dev) && | |
1988 | I915_READ(intel_dp->output_reg) & DP_PIPEB_SELECT) { | |
1989 | struct drm_crtc *crtc = intel_dp->base.base.crtc; | |
1990 | ||
1991 | /* Hardware workaround: leaving our transcoder select | |
1992 | * set to transcoder B while it's off will prevent the | |
1993 | * corresponding HDMI output on transcoder A. | |
1994 | * | |
1995 | * Combine this with another hardware workaround: | |
1996 | * transcoder select bit can only be cleared while the | |
1997 | * port is enabled. | |
1998 | */ | |
1999 | DP &= ~DP_PIPEB_SELECT; | |
2000 | I915_WRITE(intel_dp->output_reg, DP); | |
2001 | ||
2002 | /* Changes to enable or select take place the vblank | |
2003 | * after being written. | |
2004 | */ | |
2005 | if (crtc == NULL) { | |
2006 | /* We can arrive here never having been attached | |
2007 | * to a CRTC, for instance, due to inheriting | |
2008 | * random state from the BIOS. | |
2009 | * | |
2010 | * If the pipe is not running, play safe and | |
2011 | * wait for the clocks to stabilise before | |
2012 | * continuing. | |
2013 | */ | |
2014 | POSTING_READ(intel_dp->output_reg); | |
2015 | msleep(50); | |
2016 | } else | |
2017 | intel_wait_for_vblank(dev, to_intel_crtc(crtc)->pipe); | |
2018 | } | |
2019 | ||
2020 | DP &= ~DP_AUDIO_OUTPUT_ENABLE; | |
2021 | I915_WRITE(intel_dp->output_reg, DP & ~DP_PORT_EN); | |
2022 | POSTING_READ(intel_dp->output_reg); | |
2023 | msleep(intel_dp->panel_power_down_delay); | |
2024 | } | |
2025 | ||
2026 | static bool | |
2027 | intel_dp_get_dpcd(struct intel_dp *intel_dp) | |
2028 | { | |
2029 | if (intel_dp_aux_native_read_retry(intel_dp, 0x000, intel_dp->dpcd, | |
2030 | sizeof(intel_dp->dpcd)) == 0) | |
2031 | return false; /* aux transfer failed */ | |
2032 | ||
2033 | if (intel_dp->dpcd[DP_DPCD_REV] == 0) | |
2034 | return false; /* DPCD not present */ | |
2035 | ||
2036 | if (!(intel_dp->dpcd[DP_DOWNSTREAMPORT_PRESENT] & | |
2037 | DP_DWN_STRM_PORT_PRESENT)) | |
2038 | return true; /* native DP sink */ | |
2039 | ||
2040 | if (intel_dp->dpcd[DP_DPCD_REV] == 0x10) | |
2041 | return true; /* no per-port downstream info */ | |
2042 | ||
2043 | if (intel_dp_aux_native_read_retry(intel_dp, DP_DOWNSTREAM_PORT_0, | |
2044 | intel_dp->downstream_ports, | |
2045 | DP_MAX_DOWNSTREAM_PORTS) == 0) | |
2046 | return false; /* downstream port status fetch failed */ | |
2047 | ||
2048 | return true; | |
2049 | } | |
2050 | ||
2051 | static void | |
2052 | intel_dp_probe_oui(struct intel_dp *intel_dp) | |
2053 | { | |
2054 | u8 buf[3]; | |
2055 | ||
2056 | if (!(intel_dp->dpcd[DP_DOWN_STREAM_PORT_COUNT] & DP_OUI_SUPPORT)) | |
2057 | return; | |
2058 | ||
2059 | ironlake_edp_panel_vdd_on(intel_dp); | |
2060 | ||
2061 | if (intel_dp_aux_native_read_retry(intel_dp, DP_SINK_OUI, buf, 3)) | |
2062 | DRM_DEBUG_KMS("Sink OUI: %02hx%02hx%02hx\n", | |
2063 | buf[0], buf[1], buf[2]); | |
2064 | ||
2065 | if (intel_dp_aux_native_read_retry(intel_dp, DP_BRANCH_OUI, buf, 3)) | |
2066 | DRM_DEBUG_KMS("Branch OUI: %02hx%02hx%02hx\n", | |
2067 | buf[0], buf[1], buf[2]); | |
2068 | ||
2069 | ironlake_edp_panel_vdd_off(intel_dp, false); | |
2070 | } | |
2071 | ||
2072 | static bool | |
2073 | intel_dp_get_sink_irq(struct intel_dp *intel_dp, u8 *sink_irq_vector) | |
2074 | { | |
2075 | int ret; | |
2076 | ||
2077 | ret = intel_dp_aux_native_read_retry(intel_dp, | |
2078 | DP_DEVICE_SERVICE_IRQ_VECTOR, | |
2079 | sink_irq_vector, 1); | |
2080 | if (!ret) | |
2081 | return false; | |
2082 | ||
2083 | return true; | |
2084 | } | |
2085 | ||
2086 | static void | |
2087 | intel_dp_handle_test_request(struct intel_dp *intel_dp) | |
2088 | { | |
2089 | /* NAK by default */ | |
2090 | intel_dp_aux_native_write_1(intel_dp, DP_TEST_RESPONSE, DP_TEST_NAK); | |
2091 | } | |
2092 | ||
2093 | /* | |
2094 | * According to DP spec | |
2095 | * 5.1.2: | |
2096 | * 1. Read DPCD | |
2097 | * 2. Configure link according to Receiver Capabilities | |
2098 | * 3. Use Link Training from 2.5.3.3 and 3.5.1.3 | |
2099 | * 4. Check link status on receipt of hot-plug interrupt | |
2100 | */ | |
2101 | ||
2102 | static void | |
2103 | intel_dp_check_link_status(struct intel_dp *intel_dp) | |
2104 | { | |
2105 | u8 sink_irq_vector; | |
2106 | u8 link_status[DP_LINK_STATUS_SIZE]; | |
2107 | ||
2108 | if (!intel_dp->base.connectors_active) | |
2109 | return; | |
2110 | ||
2111 | if (WARN_ON(!intel_dp->base.base.crtc)) | |
2112 | return; | |
2113 | ||
2114 | /* Try to read receiver status if the link appears to be up */ | |
2115 | if (!intel_dp_get_link_status(intel_dp, link_status)) { | |
2116 | intel_dp_link_down(intel_dp); | |
2117 | return; | |
2118 | } | |
2119 | ||
2120 | /* Now read the DPCD to see if it's actually running */ | |
2121 | if (!intel_dp_get_dpcd(intel_dp)) { | |
2122 | intel_dp_link_down(intel_dp); | |
2123 | return; | |
2124 | } | |
2125 | ||
2126 | /* Try to read the source of the interrupt */ | |
2127 | if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11 && | |
2128 | intel_dp_get_sink_irq(intel_dp, &sink_irq_vector)) { | |
2129 | /* Clear interrupt source */ | |
2130 | intel_dp_aux_native_write_1(intel_dp, | |
2131 | DP_DEVICE_SERVICE_IRQ_VECTOR, | |
2132 | sink_irq_vector); | |
2133 | ||
2134 | if (sink_irq_vector & DP_AUTOMATED_TEST_REQUEST) | |
2135 | intel_dp_handle_test_request(intel_dp); | |
2136 | if (sink_irq_vector & (DP_CP_IRQ | DP_SINK_SPECIFIC_IRQ)) | |
2137 | DRM_DEBUG_DRIVER("CP or sink specific irq unhandled\n"); | |
2138 | } | |
2139 | ||
2140 | if (!drm_dp_channel_eq_ok(link_status, intel_dp->lane_count)) { | |
2141 | DRM_DEBUG_KMS("%s: channel EQ not ok, retraining\n", | |
2142 | drm_get_encoder_name(&intel_dp->base.base)); | |
2143 | intel_dp_start_link_train(intel_dp); | |
2144 | intel_dp_complete_link_train(intel_dp); | |
2145 | } | |
2146 | } | |
2147 | ||
2148 | /* XXX this is probably wrong for multiple downstream ports */ | |
2149 | static enum drm_connector_status | |
2150 | intel_dp_detect_dpcd(struct intel_dp *intel_dp) | |
2151 | { | |
2152 | uint8_t *dpcd = intel_dp->dpcd; | |
2153 | bool hpd; | |
2154 | uint8_t type; | |
2155 | ||
2156 | if (!intel_dp_get_dpcd(intel_dp)) | |
2157 | return connector_status_disconnected; | |
2158 | ||
2159 | /* if there's no downstream port, we're done */ | |
2160 | if (!(dpcd[DP_DOWNSTREAMPORT_PRESENT] & DP_DWN_STRM_PORT_PRESENT)) | |
2161 | return connector_status_connected; | |
2162 | ||
2163 | /* If we're HPD-aware, SINK_COUNT changes dynamically */ | |
2164 | hpd = !!(intel_dp->downstream_ports[0] & DP_DS_PORT_HPD); | |
2165 | if (hpd) { | |
2166 | uint8_t reg; | |
2167 | if (!intel_dp_aux_native_read_retry(intel_dp, DP_SINK_COUNT, | |
2168 | ®, 1)) | |
2169 | return connector_status_unknown; | |
2170 | return DP_GET_SINK_COUNT(reg) ? connector_status_connected | |
2171 | : connector_status_disconnected; | |
2172 | } | |
2173 | ||
2174 | /* If no HPD, poke DDC gently */ | |
2175 | if (drm_probe_ddc(&intel_dp->adapter)) | |
2176 | return connector_status_connected; | |
2177 | ||
2178 | /* Well we tried, say unknown for unreliable port types */ | |
2179 | type = intel_dp->downstream_ports[0] & DP_DS_PORT_TYPE_MASK; | |
2180 | if (type == DP_DS_PORT_TYPE_VGA || type == DP_DS_PORT_TYPE_NON_EDID) | |
2181 | return connector_status_unknown; | |
2182 | ||
2183 | /* Anything else is out of spec, warn and ignore */ | |
2184 | DRM_DEBUG_KMS("Broken DP branch device, ignoring\n"); | |
2185 | return connector_status_disconnected; | |
2186 | } | |
2187 | ||
2188 | static enum drm_connector_status | |
2189 | ironlake_dp_detect(struct intel_dp *intel_dp) | |
2190 | { | |
2191 | struct drm_device *dev = intel_dp_to_dev(intel_dp); | |
2192 | enum drm_connector_status status; | |
2193 | ||
2194 | /* Can't disconnect eDP, but you can close the lid... */ | |
2195 | if (is_edp(intel_dp)) { | |
2196 | status = intel_panel_detect(dev); | |
2197 | if (status == connector_status_unknown) | |
2198 | status = connector_status_connected; | |
2199 | return status; | |
2200 | } | |
2201 | ||
2202 | return intel_dp_detect_dpcd(intel_dp); | |
2203 | } | |
2204 | ||
2205 | static enum drm_connector_status | |
2206 | g4x_dp_detect(struct intel_dp *intel_dp) | |
2207 | { | |
2208 | struct drm_device *dev = intel_dp_to_dev(intel_dp); | |
2209 | struct drm_i915_private *dev_priv = dev->dev_private; | |
2210 | uint32_t bit; | |
2211 | ||
2212 | switch (intel_dp->output_reg) { | |
2213 | case DP_B: | |
2214 | bit = DPB_HOTPLUG_LIVE_STATUS; | |
2215 | break; | |
2216 | case DP_C: | |
2217 | bit = DPC_HOTPLUG_LIVE_STATUS; | |
2218 | break; | |
2219 | case DP_D: | |
2220 | bit = DPD_HOTPLUG_LIVE_STATUS; | |
2221 | break; | |
2222 | default: | |
2223 | return connector_status_unknown; | |
2224 | } | |
2225 | ||
2226 | if ((I915_READ(PORT_HOTPLUG_STAT) & bit) == 0) | |
2227 | return connector_status_disconnected; | |
2228 | ||
2229 | return intel_dp_detect_dpcd(intel_dp); | |
2230 | } | |
2231 | ||
2232 | static struct edid * | |
2233 | intel_dp_get_edid(struct drm_connector *connector, struct i2c_adapter *adapter) | |
2234 | { | |
2235 | struct intel_connector *intel_connector = to_intel_connector(connector); | |
2236 | ||
2237 | /* use cached edid if we have one */ | |
2238 | if (intel_connector->edid) { | |
2239 | struct edid *edid; | |
2240 | int size; | |
2241 | ||
2242 | /* invalid edid */ | |
2243 | if (IS_ERR(intel_connector->edid)) | |
2244 | return NULL; | |
2245 | ||
2246 | size = (intel_connector->edid->extensions + 1) * EDID_LENGTH; | |
2247 | edid = kmalloc(size, GFP_KERNEL); | |
2248 | if (!edid) | |
2249 | return NULL; | |
2250 | ||
2251 | memcpy(edid, intel_connector->edid, size); | |
2252 | return edid; | |
2253 | } | |
2254 | ||
2255 | return drm_get_edid(connector, adapter); | |
2256 | } | |
2257 | ||
2258 | static int | |
2259 | intel_dp_get_edid_modes(struct drm_connector *connector, struct i2c_adapter *adapter) | |
2260 | { | |
2261 | struct intel_connector *intel_connector = to_intel_connector(connector); | |
2262 | ||
2263 | /* use cached edid if we have one */ | |
2264 | if (intel_connector->edid) { | |
2265 | /* invalid edid */ | |
2266 | if (IS_ERR(intel_connector->edid)) | |
2267 | return 0; | |
2268 | ||
2269 | return intel_connector_update_modes(connector, | |
2270 | intel_connector->edid); | |
2271 | } | |
2272 | ||
2273 | return intel_ddc_get_modes(connector, adapter); | |
2274 | } | |
2275 | ||
2276 | ||
2277 | /** | |
2278 | * Uses CRT_HOTPLUG_EN and CRT_HOTPLUG_STAT to detect DP connection. | |
2279 | * | |
2280 | * \return true if DP port is connected. | |
2281 | * \return false if DP port is disconnected. | |
2282 | */ | |
2283 | static enum drm_connector_status | |
2284 | intel_dp_detect(struct drm_connector *connector, bool force) | |
2285 | { | |
2286 | struct intel_dp *intel_dp = intel_attached_dp(connector); | |
2287 | struct drm_device *dev = connector->dev; | |
2288 | enum drm_connector_status status; | |
2289 | struct edid *edid = NULL; | |
2290 | char dpcd_hex_dump[sizeof(intel_dp->dpcd) * 3]; | |
2291 | ||
2292 | intel_dp->has_audio = false; | |
2293 | ||
2294 | if (HAS_PCH_SPLIT(dev)) | |
2295 | status = ironlake_dp_detect(intel_dp); | |
2296 | else | |
2297 | status = g4x_dp_detect(intel_dp); | |
2298 | ||
2299 | hex_dump_to_buffer(intel_dp->dpcd, sizeof(intel_dp->dpcd), | |
2300 | 32, 1, dpcd_hex_dump, sizeof(dpcd_hex_dump), false); | |
2301 | DRM_DEBUG_KMS("DPCD: %s\n", dpcd_hex_dump); | |
2302 | ||
2303 | if (status != connector_status_connected) | |
2304 | return status; | |
2305 | ||
2306 | intel_dp_probe_oui(intel_dp); | |
2307 | ||
2308 | if (intel_dp->force_audio != HDMI_AUDIO_AUTO) { | |
2309 | intel_dp->has_audio = (intel_dp->force_audio == HDMI_AUDIO_ON); | |
2310 | } else { | |
2311 | edid = intel_dp_get_edid(connector, &intel_dp->adapter); | |
2312 | if (edid) { | |
2313 | intel_dp->has_audio = drm_detect_monitor_audio(edid); | |
2314 | kfree(edid); | |
2315 | } | |
2316 | } | |
2317 | ||
2318 | return connector_status_connected; | |
2319 | } | |
2320 | ||
2321 | static int intel_dp_get_modes(struct drm_connector *connector) | |
2322 | { | |
2323 | struct intel_dp *intel_dp = intel_attached_dp(connector); | |
2324 | struct intel_connector *intel_connector = to_intel_connector(connector); | |
2325 | struct drm_device *dev = connector->dev; | |
2326 | int ret; | |
2327 | ||
2328 | /* We should parse the EDID data and find out if it has an audio sink | |
2329 | */ | |
2330 | ||
2331 | ret = intel_dp_get_edid_modes(connector, &intel_dp->adapter); | |
2332 | if (ret) | |
2333 | return ret; | |
2334 | ||
2335 | /* if eDP has no EDID, fall back to fixed mode */ | |
2336 | if (is_edp(intel_dp) && intel_connector->panel.fixed_mode) { | |
2337 | struct drm_display_mode *mode; | |
2338 | mode = drm_mode_duplicate(dev, | |
2339 | intel_connector->panel.fixed_mode); | |
2340 | if (mode) { | |
2341 | drm_mode_probed_add(connector, mode); | |
2342 | return 1; | |
2343 | } | |
2344 | } | |
2345 | return 0; | |
2346 | } | |
2347 | ||
2348 | static bool | |
2349 | intel_dp_detect_audio(struct drm_connector *connector) | |
2350 | { | |
2351 | struct intel_dp *intel_dp = intel_attached_dp(connector); | |
2352 | struct edid *edid; | |
2353 | bool has_audio = false; | |
2354 | ||
2355 | edid = intel_dp_get_edid(connector, &intel_dp->adapter); | |
2356 | if (edid) { | |
2357 | has_audio = drm_detect_monitor_audio(edid); | |
2358 | kfree(edid); | |
2359 | } | |
2360 | ||
2361 | return has_audio; | |
2362 | } | |
2363 | ||
2364 | static int | |
2365 | intel_dp_set_property(struct drm_connector *connector, | |
2366 | struct drm_property *property, | |
2367 | uint64_t val) | |
2368 | { | |
2369 | struct drm_i915_private *dev_priv = connector->dev->dev_private; | |
2370 | struct intel_connector *intel_connector = to_intel_connector(connector); | |
2371 | struct intel_dp *intel_dp = intel_attached_dp(connector); | |
2372 | int ret; | |
2373 | ||
2374 | ret = drm_connector_property_set_value(connector, property, val); | |
2375 | if (ret) | |
2376 | return ret; | |
2377 | ||
2378 | if (property == dev_priv->force_audio_property) { | |
2379 | int i = val; | |
2380 | bool has_audio; | |
2381 | ||
2382 | if (i == intel_dp->force_audio) | |
2383 | return 0; | |
2384 | ||
2385 | intel_dp->force_audio = i; | |
2386 | ||
2387 | if (i == HDMI_AUDIO_AUTO) | |
2388 | has_audio = intel_dp_detect_audio(connector); | |
2389 | else | |
2390 | has_audio = (i == HDMI_AUDIO_ON); | |
2391 | ||
2392 | if (has_audio == intel_dp->has_audio) | |
2393 | return 0; | |
2394 | ||
2395 | intel_dp->has_audio = has_audio; | |
2396 | goto done; | |
2397 | } | |
2398 | ||
2399 | if (property == dev_priv->broadcast_rgb_property) { | |
2400 | if (val == !!intel_dp->color_range) | |
2401 | return 0; | |
2402 | ||
2403 | intel_dp->color_range = val ? DP_COLOR_RANGE_16_235 : 0; | |
2404 | goto done; | |
2405 | } | |
2406 | ||
2407 | if (is_edp(intel_dp) && | |
2408 | property == connector->dev->mode_config.scaling_mode_property) { | |
2409 | if (val == DRM_MODE_SCALE_NONE) { | |
2410 | DRM_DEBUG_KMS("no scaling not supported\n"); | |
2411 | return -EINVAL; | |
2412 | } | |
2413 | ||
2414 | if (intel_connector->panel.fitting_mode == val) { | |
2415 | /* the eDP scaling property is not changed */ | |
2416 | return 0; | |
2417 | } | |
2418 | intel_connector->panel.fitting_mode = val; | |
2419 | ||
2420 | goto done; | |
2421 | } | |
2422 | ||
2423 | return -EINVAL; | |
2424 | ||
2425 | done: | |
2426 | if (intel_dp->base.base.crtc) { | |
2427 | struct drm_crtc *crtc = intel_dp->base.base.crtc; | |
2428 | intel_set_mode(crtc, &crtc->mode, | |
2429 | crtc->x, crtc->y, crtc->fb); | |
2430 | } | |
2431 | ||
2432 | return 0; | |
2433 | } | |
2434 | ||
2435 | static void | |
2436 | intel_dp_destroy(struct drm_connector *connector) | |
2437 | { | |
2438 | struct drm_device *dev = connector->dev; | |
2439 | struct intel_dp *intel_dp = intel_attached_dp(connector); | |
2440 | struct intel_connector *intel_connector = to_intel_connector(connector); | |
2441 | ||
2442 | if (!IS_ERR_OR_NULL(intel_connector->edid)) | |
2443 | kfree(intel_connector->edid); | |
2444 | ||
2445 | if (is_edp(intel_dp)) { | |
2446 | intel_panel_destroy_backlight(dev); | |
2447 | intel_panel_fini(&intel_connector->panel); | |
2448 | } | |
2449 | ||
2450 | drm_sysfs_connector_remove(connector); | |
2451 | drm_connector_cleanup(connector); | |
2452 | kfree(connector); | |
2453 | } | |
2454 | ||
2455 | static void intel_dp_encoder_destroy(struct drm_encoder *encoder) | |
2456 | { | |
2457 | struct intel_dp *intel_dp = enc_to_intel_dp(encoder); | |
2458 | ||
2459 | i2c_del_adapter(&intel_dp->adapter); | |
2460 | drm_encoder_cleanup(encoder); | |
2461 | if (is_edp(intel_dp)) { | |
2462 | cancel_delayed_work_sync(&intel_dp->panel_vdd_work); | |
2463 | ironlake_panel_vdd_off_sync(intel_dp); | |
2464 | } | |
2465 | kfree(intel_dp); | |
2466 | } | |
2467 | ||
2468 | static const struct drm_encoder_helper_funcs intel_dp_helper_funcs = { | |
2469 | .mode_fixup = intel_dp_mode_fixup, | |
2470 | .mode_set = intel_dp_mode_set, | |
2471 | .disable = intel_encoder_noop, | |
2472 | }; | |
2473 | ||
2474 | static const struct drm_encoder_helper_funcs intel_dp_helper_funcs_hsw = { | |
2475 | .mode_fixup = intel_dp_mode_fixup, | |
2476 | .mode_set = intel_ddi_mode_set, | |
2477 | .disable = intel_encoder_noop, | |
2478 | }; | |
2479 | ||
2480 | static const struct drm_connector_funcs intel_dp_connector_funcs = { | |
2481 | .dpms = intel_connector_dpms, | |
2482 | .detect = intel_dp_detect, | |
2483 | .fill_modes = drm_helper_probe_single_connector_modes, | |
2484 | .set_property = intel_dp_set_property, | |
2485 | .destroy = intel_dp_destroy, | |
2486 | }; | |
2487 | ||
2488 | static const struct drm_connector_helper_funcs intel_dp_connector_helper_funcs = { | |
2489 | .get_modes = intel_dp_get_modes, | |
2490 | .mode_valid = intel_dp_mode_valid, | |
2491 | .best_encoder = intel_best_encoder, | |
2492 | }; | |
2493 | ||
2494 | static const struct drm_encoder_funcs intel_dp_enc_funcs = { | |
2495 | .destroy = intel_dp_encoder_destroy, | |
2496 | }; | |
2497 | ||
2498 | static void | |
2499 | intel_dp_hot_plug(struct intel_encoder *intel_encoder) | |
2500 | { | |
2501 | struct intel_dp *intel_dp = enc_to_intel_dp(&intel_encoder->base); | |
2502 | ||
2503 | intel_dp_check_link_status(intel_dp); | |
2504 | } | |
2505 | ||
2506 | /* Return which DP Port should be selected for Transcoder DP control */ | |
2507 | int | |
2508 | intel_trans_dp_port_sel(struct drm_crtc *crtc) | |
2509 | { | |
2510 | struct drm_device *dev = crtc->dev; | |
2511 | struct intel_encoder *intel_encoder; | |
2512 | struct intel_dp *intel_dp; | |
2513 | ||
2514 | for_each_encoder_on_crtc(dev, crtc, intel_encoder) { | |
2515 | intel_dp = enc_to_intel_dp(&intel_encoder->base); | |
2516 | ||
2517 | if (intel_encoder->type == INTEL_OUTPUT_DISPLAYPORT || | |
2518 | intel_encoder->type == INTEL_OUTPUT_EDP) | |
2519 | return intel_dp->output_reg; | |
2520 | } | |
2521 | ||
2522 | return -1; | |
2523 | } | |
2524 | ||
2525 | /* check the VBT to see whether the eDP is on DP-D port */ | |
2526 | bool intel_dpd_is_edp(struct drm_device *dev) | |
2527 | { | |
2528 | struct drm_i915_private *dev_priv = dev->dev_private; | |
2529 | struct child_device_config *p_child; | |
2530 | int i; | |
2531 | ||
2532 | if (!dev_priv->child_dev_num) | |
2533 | return false; | |
2534 | ||
2535 | for (i = 0; i < dev_priv->child_dev_num; i++) { | |
2536 | p_child = dev_priv->child_dev + i; | |
2537 | ||
2538 | if (p_child->dvo_port == PORT_IDPD && | |
2539 | p_child->device_type == DEVICE_TYPE_eDP) | |
2540 | return true; | |
2541 | } | |
2542 | return false; | |
2543 | } | |
2544 | ||
2545 | static void | |
2546 | intel_dp_add_properties(struct intel_dp *intel_dp, struct drm_connector *connector) | |
2547 | { | |
2548 | struct intel_connector *intel_connector = to_intel_connector(connector); | |
2549 | ||
2550 | intel_attach_force_audio_property(connector); | |
2551 | intel_attach_broadcast_rgb_property(connector); | |
2552 | ||
2553 | if (is_edp(intel_dp)) { | |
2554 | drm_mode_create_scaling_mode_property(connector->dev); | |
2555 | drm_connector_attach_property( | |
2556 | connector, | |
2557 | connector->dev->mode_config.scaling_mode_property, | |
2558 | DRM_MODE_SCALE_ASPECT); | |
2559 | intel_connector->panel.fitting_mode = DRM_MODE_SCALE_ASPECT; | |
2560 | } | |
2561 | } | |
2562 | ||
2563 | static void | |
2564 | intel_dp_init_panel_power_sequencer(struct drm_device *dev, | |
2565 | struct intel_dp *intel_dp) | |
2566 | { | |
2567 | struct drm_i915_private *dev_priv = dev->dev_private; | |
2568 | struct edp_power_seq cur, vbt, spec, final; | |
2569 | u32 pp_on, pp_off, pp_div, pp; | |
2570 | ||
2571 | /* Workaround: Need to write PP_CONTROL with the unlock key as | |
2572 | * the very first thing. */ | |
2573 | pp = ironlake_get_pp_control(dev_priv); | |
2574 | I915_WRITE(PCH_PP_CONTROL, pp); | |
2575 | ||
2576 | pp_on = I915_READ(PCH_PP_ON_DELAYS); | |
2577 | pp_off = I915_READ(PCH_PP_OFF_DELAYS); | |
2578 | pp_div = I915_READ(PCH_PP_DIVISOR); | |
2579 | ||
2580 | /* Pull timing values out of registers */ | |
2581 | cur.t1_t3 = (pp_on & PANEL_POWER_UP_DELAY_MASK) >> | |
2582 | PANEL_POWER_UP_DELAY_SHIFT; | |
2583 | ||
2584 | cur.t8 = (pp_on & PANEL_LIGHT_ON_DELAY_MASK) >> | |
2585 | PANEL_LIGHT_ON_DELAY_SHIFT; | |
2586 | ||
2587 | cur.t9 = (pp_off & PANEL_LIGHT_OFF_DELAY_MASK) >> | |
2588 | PANEL_LIGHT_OFF_DELAY_SHIFT; | |
2589 | ||
2590 | cur.t10 = (pp_off & PANEL_POWER_DOWN_DELAY_MASK) >> | |
2591 | PANEL_POWER_DOWN_DELAY_SHIFT; | |
2592 | ||
2593 | cur.t11_t12 = ((pp_div & PANEL_POWER_CYCLE_DELAY_MASK) >> | |
2594 | PANEL_POWER_CYCLE_DELAY_SHIFT) * 1000; | |
2595 | ||
2596 | DRM_DEBUG_KMS("cur t1_t3 %d t8 %d t9 %d t10 %d t11_t12 %d\n", | |
2597 | cur.t1_t3, cur.t8, cur.t9, cur.t10, cur.t11_t12); | |
2598 | ||
2599 | vbt = dev_priv->edp.pps; | |
2600 | ||
2601 | /* Upper limits from eDP 1.3 spec. Note that we use the clunky units of | |
2602 | * our hw here, which are all in 100usec. */ | |
2603 | spec.t1_t3 = 210 * 10; | |
2604 | spec.t8 = 50 * 10; /* no limit for t8, use t7 instead */ | |
2605 | spec.t9 = 50 * 10; /* no limit for t9, make it symmetric with t8 */ | |
2606 | spec.t10 = 500 * 10; | |
2607 | /* This one is special and actually in units of 100ms, but zero | |
2608 | * based in the hw (so we need to add 100 ms). But the sw vbt | |
2609 | * table multiplies it with 1000 to make it in units of 100usec, | |
2610 | * too. */ | |
2611 | spec.t11_t12 = (510 + 100) * 10; | |
2612 | ||
2613 | DRM_DEBUG_KMS("vbt t1_t3 %d t8 %d t9 %d t10 %d t11_t12 %d\n", | |
2614 | vbt.t1_t3, vbt.t8, vbt.t9, vbt.t10, vbt.t11_t12); | |
2615 | ||
2616 | /* Use the max of the register settings and vbt. If both are | |
2617 | * unset, fall back to the spec limits. */ | |
2618 | #define assign_final(field) final.field = (max(cur.field, vbt.field) == 0 ? \ | |
2619 | spec.field : \ | |
2620 | max(cur.field, vbt.field)) | |
2621 | assign_final(t1_t3); | |
2622 | assign_final(t8); | |
2623 | assign_final(t9); | |
2624 | assign_final(t10); | |
2625 | assign_final(t11_t12); | |
2626 | #undef assign_final | |
2627 | ||
2628 | #define get_delay(field) (DIV_ROUND_UP(final.field, 10)) | |
2629 | intel_dp->panel_power_up_delay = get_delay(t1_t3); | |
2630 | intel_dp->backlight_on_delay = get_delay(t8); | |
2631 | intel_dp->backlight_off_delay = get_delay(t9); | |
2632 | intel_dp->panel_power_down_delay = get_delay(t10); | |
2633 | intel_dp->panel_power_cycle_delay = get_delay(t11_t12); | |
2634 | #undef get_delay | |
2635 | ||
2636 | /* And finally store the new values in the power sequencer. */ | |
2637 | pp_on = (final.t1_t3 << PANEL_POWER_UP_DELAY_SHIFT) | | |
2638 | (final.t8 << PANEL_LIGHT_ON_DELAY_SHIFT); | |
2639 | pp_off = (final.t9 << PANEL_LIGHT_OFF_DELAY_SHIFT) | | |
2640 | (final.t10 << PANEL_POWER_DOWN_DELAY_SHIFT); | |
2641 | /* Compute the divisor for the pp clock, simply match the Bspec | |
2642 | * formula. */ | |
2643 | pp_div = ((100 * intel_pch_rawclk(dev))/2 - 1) | |
2644 | << PP_REFERENCE_DIVIDER_SHIFT; | |
2645 | pp_div |= (DIV_ROUND_UP(final.t11_t12, 1000) | |
2646 | << PANEL_POWER_CYCLE_DELAY_SHIFT); | |
2647 | ||
2648 | /* Haswell doesn't have any port selection bits for the panel | |
2649 | * power sequencer any more. */ | |
2650 | if (HAS_PCH_IBX(dev) || HAS_PCH_CPT(dev)) { | |
2651 | if (is_cpu_edp(intel_dp)) | |
2652 | pp_on |= PANEL_POWER_PORT_DP_A; | |
2653 | else | |
2654 | pp_on |= PANEL_POWER_PORT_DP_D; | |
2655 | } | |
2656 | ||
2657 | I915_WRITE(PCH_PP_ON_DELAYS, pp_on); | |
2658 | I915_WRITE(PCH_PP_OFF_DELAYS, pp_off); | |
2659 | I915_WRITE(PCH_PP_DIVISOR, pp_div); | |
2660 | ||
2661 | ||
2662 | DRM_DEBUG_KMS("panel power up delay %d, power down delay %d, power cycle delay %d\n", | |
2663 | intel_dp->panel_power_up_delay, intel_dp->panel_power_down_delay, | |
2664 | intel_dp->panel_power_cycle_delay); | |
2665 | ||
2666 | DRM_DEBUG_KMS("backlight on delay %d, off delay %d\n", | |
2667 | intel_dp->backlight_on_delay, intel_dp->backlight_off_delay); | |
2668 | ||
2669 | DRM_DEBUG_KMS("panel power sequencer register settings: PP_ON %#x, PP_OFF %#x, PP_DIV %#x\n", | |
2670 | I915_READ(PCH_PP_ON_DELAYS), | |
2671 | I915_READ(PCH_PP_OFF_DELAYS), | |
2672 | I915_READ(PCH_PP_DIVISOR)); | |
2673 | } | |
2674 | ||
2675 | void | |
2676 | intel_dp_init(struct drm_device *dev, int output_reg, enum port port) | |
2677 | { | |
2678 | struct drm_i915_private *dev_priv = dev->dev_private; | |
2679 | struct drm_connector *connector; | |
2680 | struct intel_dp *intel_dp; | |
2681 | struct intel_encoder *intel_encoder; | |
2682 | struct intel_connector *intel_connector; | |
2683 | struct drm_display_mode *fixed_mode = NULL; | |
2684 | const char *name = NULL; | |
2685 | int type; | |
2686 | ||
2687 | intel_dp = kzalloc(sizeof(struct intel_dp), GFP_KERNEL); | |
2688 | if (!intel_dp) | |
2689 | return; | |
2690 | ||
2691 | intel_dp->output_reg = output_reg; | |
2692 | intel_dp->port = port; | |
2693 | /* Preserve the current hw state. */ | |
2694 | intel_dp->DP = I915_READ(intel_dp->output_reg); | |
2695 | ||
2696 | intel_connector = kzalloc(sizeof(struct intel_connector), GFP_KERNEL); | |
2697 | if (!intel_connector) { | |
2698 | kfree(intel_dp); | |
2699 | return; | |
2700 | } | |
2701 | intel_encoder = &intel_dp->base; | |
2702 | intel_dp->attached_connector = intel_connector; | |
2703 | ||
2704 | if (HAS_PCH_SPLIT(dev) && output_reg == PCH_DP_D) | |
2705 | if (intel_dpd_is_edp(dev)) | |
2706 | intel_dp->is_pch_edp = true; | |
2707 | ||
2708 | /* | |
2709 | * FIXME : We need to initialize built-in panels before external panels. | |
2710 | * For X0, DP_C is fixed as eDP. Revisit this as part of VLV eDP cleanup | |
2711 | */ | |
2712 | if (IS_VALLEYVIEW(dev) && output_reg == DP_C) { | |
2713 | type = DRM_MODE_CONNECTOR_eDP; | |
2714 | intel_encoder->type = INTEL_OUTPUT_EDP; | |
2715 | } else if (output_reg == DP_A || is_pch_edp(intel_dp)) { | |
2716 | type = DRM_MODE_CONNECTOR_eDP; | |
2717 | intel_encoder->type = INTEL_OUTPUT_EDP; | |
2718 | } else { | |
2719 | type = DRM_MODE_CONNECTOR_DisplayPort; | |
2720 | intel_encoder->type = INTEL_OUTPUT_DISPLAYPORT; | |
2721 | } | |
2722 | ||
2723 | connector = &intel_connector->base; | |
2724 | drm_connector_init(dev, connector, &intel_dp_connector_funcs, type); | |
2725 | drm_connector_helper_add(connector, &intel_dp_connector_helper_funcs); | |
2726 | ||
2727 | connector->polled = DRM_CONNECTOR_POLL_HPD; | |
2728 | ||
2729 | intel_encoder->cloneable = false; | |
2730 | ||
2731 | INIT_DELAYED_WORK(&intel_dp->panel_vdd_work, | |
2732 | ironlake_panel_vdd_work); | |
2733 | ||
2734 | intel_encoder->crtc_mask = (1 << 0) | (1 << 1) | (1 << 2); | |
2735 | ||
2736 | connector->interlace_allowed = true; | |
2737 | connector->doublescan_allowed = 0; | |
2738 | ||
2739 | drm_encoder_init(dev, &intel_encoder->base, &intel_dp_enc_funcs, | |
2740 | DRM_MODE_ENCODER_TMDS); | |
2741 | ||
2742 | if (IS_HASWELL(dev)) | |
2743 | drm_encoder_helper_add(&intel_encoder->base, | |
2744 | &intel_dp_helper_funcs_hsw); | |
2745 | else | |
2746 | drm_encoder_helper_add(&intel_encoder->base, | |
2747 | &intel_dp_helper_funcs); | |
2748 | ||
2749 | intel_connector_attach_encoder(intel_connector, intel_encoder); | |
2750 | drm_sysfs_connector_add(connector); | |
2751 | ||
2752 | if (IS_HASWELL(dev)) { | |
2753 | intel_encoder->enable = intel_enable_ddi; | |
2754 | intel_encoder->pre_enable = intel_ddi_pre_enable; | |
2755 | intel_encoder->disable = intel_disable_ddi; | |
2756 | intel_encoder->post_disable = intel_ddi_post_disable; | |
2757 | intel_encoder->get_hw_state = intel_ddi_get_hw_state; | |
2758 | } else { | |
2759 | intel_encoder->enable = intel_enable_dp; | |
2760 | intel_encoder->pre_enable = intel_pre_enable_dp; | |
2761 | intel_encoder->disable = intel_disable_dp; | |
2762 | intel_encoder->post_disable = intel_post_disable_dp; | |
2763 | intel_encoder->get_hw_state = intel_dp_get_hw_state; | |
2764 | } | |
2765 | intel_connector->get_hw_state = intel_connector_get_hw_state; | |
2766 | ||
2767 | /* Set up the DDC bus. */ | |
2768 | switch (port) { | |
2769 | case PORT_A: | |
2770 | name = "DPDDC-A"; | |
2771 | break; | |
2772 | case PORT_B: | |
2773 | dev_priv->hotplug_supported_mask |= DPB_HOTPLUG_INT_STATUS; | |
2774 | name = "DPDDC-B"; | |
2775 | break; | |
2776 | case PORT_C: | |
2777 | dev_priv->hotplug_supported_mask |= DPC_HOTPLUG_INT_STATUS; | |
2778 | name = "DPDDC-C"; | |
2779 | break; | |
2780 | case PORT_D: | |
2781 | dev_priv->hotplug_supported_mask |= DPD_HOTPLUG_INT_STATUS; | |
2782 | name = "DPDDC-D"; | |
2783 | break; | |
2784 | default: | |
2785 | WARN(1, "Invalid port %c\n", port_name(port)); | |
2786 | break; | |
2787 | } | |
2788 | ||
2789 | if (is_edp(intel_dp)) | |
2790 | intel_dp_init_panel_power_sequencer(dev, intel_dp); | |
2791 | ||
2792 | intel_dp_i2c_init(intel_dp, intel_connector, name); | |
2793 | ||
2794 | /* Cache DPCD and EDID for edp. */ | |
2795 | if (is_edp(intel_dp)) { | |
2796 | bool ret; | |
2797 | struct drm_display_mode *scan; | |
2798 | struct edid *edid; | |
2799 | ||
2800 | ironlake_edp_panel_vdd_on(intel_dp); | |
2801 | ret = intel_dp_get_dpcd(intel_dp); | |
2802 | ironlake_edp_panel_vdd_off(intel_dp, false); | |
2803 | ||
2804 | if (ret) { | |
2805 | if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11) | |
2806 | dev_priv->no_aux_handshake = | |
2807 | intel_dp->dpcd[DP_MAX_DOWNSPREAD] & | |
2808 | DP_NO_AUX_HANDSHAKE_LINK_TRAINING; | |
2809 | } else { | |
2810 | /* if this fails, presume the device is a ghost */ | |
2811 | DRM_INFO("failed to retrieve link info, disabling eDP\n"); | |
2812 | intel_dp_encoder_destroy(&intel_encoder->base); | |
2813 | intel_dp_destroy(connector); | |
2814 | return; | |
2815 | } | |
2816 | ||
2817 | ironlake_edp_panel_vdd_on(intel_dp); | |
2818 | edid = drm_get_edid(connector, &intel_dp->adapter); | |
2819 | if (edid) { | |
2820 | if (drm_add_edid_modes(connector, edid)) { | |
2821 | drm_mode_connector_update_edid_property(connector, edid); | |
2822 | drm_edid_to_eld(connector, edid); | |
2823 | } else { | |
2824 | kfree(edid); | |
2825 | edid = ERR_PTR(-EINVAL); | |
2826 | } | |
2827 | } else { | |
2828 | edid = ERR_PTR(-ENOENT); | |
2829 | } | |
2830 | intel_connector->edid = edid; | |
2831 | ||
2832 | /* prefer fixed mode from EDID if available */ | |
2833 | list_for_each_entry(scan, &connector->probed_modes, head) { | |
2834 | if ((scan->type & DRM_MODE_TYPE_PREFERRED)) { | |
2835 | fixed_mode = drm_mode_duplicate(dev, scan); | |
2836 | break; | |
2837 | } | |
2838 | } | |
2839 | ||
2840 | /* fallback to VBT if available for eDP */ | |
2841 | if (!fixed_mode && dev_priv->lfp_lvds_vbt_mode) { | |
2842 | fixed_mode = drm_mode_duplicate(dev, dev_priv->lfp_lvds_vbt_mode); | |
2843 | if (fixed_mode) | |
2844 | fixed_mode->type |= DRM_MODE_TYPE_PREFERRED; | |
2845 | } | |
2846 | ||
2847 | ironlake_edp_panel_vdd_off(intel_dp, false); | |
2848 | } | |
2849 | ||
2850 | intel_encoder->hot_plug = intel_dp_hot_plug; | |
2851 | ||
2852 | if (is_edp(intel_dp)) { | |
2853 | intel_panel_init(&intel_connector->panel, fixed_mode); | |
2854 | intel_panel_setup_backlight(connector); | |
2855 | } | |
2856 | ||
2857 | intel_dp_add_properties(intel_dp, connector); | |
2858 | ||
2859 | /* For G4X desktop chip, PEG_BAND_GAP_DATA 3:0 must first be written | |
2860 | * 0xd. Failure to do so will result in spurious interrupts being | |
2861 | * generated on the port when a cable is not attached. | |
2862 | */ | |
2863 | if (IS_G4X(dev) && !IS_GM45(dev)) { | |
2864 | u32 temp = I915_READ(PEG_BAND_GAP_DATA); | |
2865 | I915_WRITE(PEG_BAND_GAP_DATA, (temp & ~0xf) | 0xd); | |
2866 | } | |
2867 | } |