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a4fc5ed6 KP |
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> | |
5a0e3ad6 | 29 | #include <linux/slab.h> |
a4fc5ed6 KP |
30 | #include "drmP.h" |
31 | #include "drm.h" | |
32 | #include "drm_crtc.h" | |
33 | #include "drm_crtc_helper.h" | |
34 | #include "intel_drv.h" | |
35 | #include "i915_drm.h" | |
36 | #include "i915_drv.h" | |
ab2c0672 | 37 | #include "drm_dp_helper.h" |
a4fc5ed6 | 38 | |
ae266c98 | 39 | |
a4fc5ed6 KP |
40 | #define DP_LINK_STATUS_SIZE 6 |
41 | #define DP_LINK_CHECK_TIMEOUT (10 * 1000) | |
42 | ||
43 | #define DP_LINK_CONFIGURATION_SIZE 9 | |
44 | ||
32f9d658 | 45 | #define IS_eDP(i) ((i)->type == INTEL_OUTPUT_EDP) |
f0917379 | 46 | #define IS_PCH_eDP(dp_priv) ((dp_priv)->is_pch_edp) |
32f9d658 | 47 | |
a4fc5ed6 KP |
48 | struct intel_dp_priv { |
49 | uint32_t output_reg; | |
50 | uint32_t DP; | |
51 | uint8_t link_configuration[DP_LINK_CONFIGURATION_SIZE]; | |
a4fc5ed6 | 52 | bool has_audio; |
c8110e52 | 53 | int dpms_mode; |
a4fc5ed6 KP |
54 | uint8_t link_bw; |
55 | uint8_t lane_count; | |
56 | uint8_t dpcd[4]; | |
21d40d37 | 57 | struct intel_encoder *intel_encoder; |
a4fc5ed6 KP |
58 | struct i2c_adapter adapter; |
59 | struct i2c_algo_dp_aux_data algo; | |
f0917379 | 60 | bool is_pch_edp; |
a4fc5ed6 KP |
61 | }; |
62 | ||
63 | static void | |
21d40d37 | 64 | intel_dp_link_train(struct intel_encoder *intel_encoder, uint32_t DP, |
a4fc5ed6 KP |
65 | uint8_t link_configuration[DP_LINK_CONFIGURATION_SIZE]); |
66 | ||
67 | static void | |
21d40d37 | 68 | intel_dp_link_down(struct intel_encoder *intel_encoder, uint32_t DP); |
a4fc5ed6 | 69 | |
32f9d658 | 70 | void |
21d40d37 | 71 | intel_edp_link_config (struct intel_encoder *intel_encoder, |
32f9d658 ZW |
72 | int *lane_num, int *link_bw) |
73 | { | |
21d40d37 | 74 | struct intel_dp_priv *dp_priv = intel_encoder->dev_priv; |
32f9d658 ZW |
75 | |
76 | *lane_num = dp_priv->lane_count; | |
77 | if (dp_priv->link_bw == DP_LINK_BW_1_62) | |
78 | *link_bw = 162000; | |
79 | else if (dp_priv->link_bw == DP_LINK_BW_2_7) | |
80 | *link_bw = 270000; | |
81 | } | |
82 | ||
a4fc5ed6 | 83 | static int |
21d40d37 | 84 | intel_dp_max_lane_count(struct intel_encoder *intel_encoder) |
a4fc5ed6 | 85 | { |
21d40d37 | 86 | struct intel_dp_priv *dp_priv = intel_encoder->dev_priv; |
a4fc5ed6 KP |
87 | int max_lane_count = 4; |
88 | ||
89 | if (dp_priv->dpcd[0] >= 0x11) { | |
90 | max_lane_count = dp_priv->dpcd[2] & 0x1f; | |
91 | switch (max_lane_count) { | |
92 | case 1: case 2: case 4: | |
93 | break; | |
94 | default: | |
95 | max_lane_count = 4; | |
96 | } | |
97 | } | |
98 | return max_lane_count; | |
99 | } | |
100 | ||
101 | static int | |
21d40d37 | 102 | intel_dp_max_link_bw(struct intel_encoder *intel_encoder) |
a4fc5ed6 | 103 | { |
21d40d37 | 104 | struct intel_dp_priv *dp_priv = intel_encoder->dev_priv; |
a4fc5ed6 KP |
105 | int max_link_bw = dp_priv->dpcd[1]; |
106 | ||
107 | switch (max_link_bw) { | |
108 | case DP_LINK_BW_1_62: | |
109 | case DP_LINK_BW_2_7: | |
110 | break; | |
111 | default: | |
112 | max_link_bw = DP_LINK_BW_1_62; | |
113 | break; | |
114 | } | |
115 | return max_link_bw; | |
116 | } | |
117 | ||
118 | static int | |
119 | intel_dp_link_clock(uint8_t link_bw) | |
120 | { | |
121 | if (link_bw == DP_LINK_BW_2_7) | |
122 | return 270000; | |
123 | else | |
124 | return 162000; | |
125 | } | |
126 | ||
127 | /* I think this is a fiction */ | |
128 | static int | |
885a5fb5 | 129 | intel_dp_link_required(struct drm_device *dev, |
21d40d37 | 130 | struct intel_encoder *intel_encoder, int pixel_clock) |
a4fc5ed6 | 131 | { |
885a5fb5 | 132 | struct drm_i915_private *dev_priv = dev->dev_private; |
36e83a18 | 133 | struct intel_dp_priv *dp_priv = intel_encoder->dev_priv; |
885a5fb5 | 134 | |
36e83a18 | 135 | if (IS_eDP(intel_encoder) || IS_PCH_eDP(dp_priv)) |
885a5fb5 ZW |
136 | return (pixel_clock * dev_priv->edp_bpp) / 8; |
137 | else | |
138 | return pixel_clock * 3; | |
a4fc5ed6 KP |
139 | } |
140 | ||
fe27d53e DA |
141 | static int |
142 | intel_dp_max_data_rate(int max_link_clock, int max_lanes) | |
143 | { | |
144 | return (max_link_clock * max_lanes * 8) / 10; | |
145 | } | |
146 | ||
a4fc5ed6 KP |
147 | static int |
148 | intel_dp_mode_valid(struct drm_connector *connector, | |
149 | struct drm_display_mode *mode) | |
150 | { | |
55f78c43 ZW |
151 | struct drm_encoder *encoder = intel_attached_encoder(connector); |
152 | struct intel_encoder *intel_encoder = enc_to_intel_encoder(encoder); | |
21d40d37 EA |
153 | int max_link_clock = intel_dp_link_clock(intel_dp_max_link_bw(intel_encoder)); |
154 | int max_lanes = intel_dp_max_lane_count(intel_encoder); | |
a4fc5ed6 | 155 | |
fe27d53e DA |
156 | /* only refuse the mode on non eDP since we have seen some wierd eDP panels |
157 | which are outside spec tolerances but somehow work by magic */ | |
158 | if (!IS_eDP(intel_encoder) && | |
159 | (intel_dp_link_required(connector->dev, intel_encoder, mode->clock) | |
160 | > intel_dp_max_data_rate(max_link_clock, max_lanes))) | |
a4fc5ed6 KP |
161 | return MODE_CLOCK_HIGH; |
162 | ||
163 | if (mode->clock < 10000) | |
164 | return MODE_CLOCK_LOW; | |
165 | ||
166 | return MODE_OK; | |
167 | } | |
168 | ||
169 | static uint32_t | |
170 | pack_aux(uint8_t *src, int src_bytes) | |
171 | { | |
172 | int i; | |
173 | uint32_t v = 0; | |
174 | ||
175 | if (src_bytes > 4) | |
176 | src_bytes = 4; | |
177 | for (i = 0; i < src_bytes; i++) | |
178 | v |= ((uint32_t) src[i]) << ((3-i) * 8); | |
179 | return v; | |
180 | } | |
181 | ||
182 | static void | |
183 | unpack_aux(uint32_t src, uint8_t *dst, int dst_bytes) | |
184 | { | |
185 | int i; | |
186 | if (dst_bytes > 4) | |
187 | dst_bytes = 4; | |
188 | for (i = 0; i < dst_bytes; i++) | |
189 | dst[i] = src >> ((3-i) * 8); | |
190 | } | |
191 | ||
fb0f8fbf KP |
192 | /* hrawclock is 1/4 the FSB frequency */ |
193 | static int | |
194 | intel_hrawclk(struct drm_device *dev) | |
195 | { | |
196 | struct drm_i915_private *dev_priv = dev->dev_private; | |
197 | uint32_t clkcfg; | |
198 | ||
199 | clkcfg = I915_READ(CLKCFG); | |
200 | switch (clkcfg & CLKCFG_FSB_MASK) { | |
201 | case CLKCFG_FSB_400: | |
202 | return 100; | |
203 | case CLKCFG_FSB_533: | |
204 | return 133; | |
205 | case CLKCFG_FSB_667: | |
206 | return 166; | |
207 | case CLKCFG_FSB_800: | |
208 | return 200; | |
209 | case CLKCFG_FSB_1067: | |
210 | return 266; | |
211 | case CLKCFG_FSB_1333: | |
212 | return 333; | |
213 | /* these two are just a guess; one of them might be right */ | |
214 | case CLKCFG_FSB_1600: | |
215 | case CLKCFG_FSB_1600_ALT: | |
216 | return 400; | |
217 | default: | |
218 | return 133; | |
219 | } | |
220 | } | |
221 | ||
a4fc5ed6 | 222 | static int |
21d40d37 | 223 | intel_dp_aux_ch(struct intel_encoder *intel_encoder, |
a4fc5ed6 KP |
224 | uint8_t *send, int send_bytes, |
225 | uint8_t *recv, int recv_size) | |
226 | { | |
21d40d37 | 227 | struct intel_dp_priv *dp_priv = intel_encoder->dev_priv; |
a4fc5ed6 | 228 | uint32_t output_reg = dp_priv->output_reg; |
55f78c43 | 229 | struct drm_device *dev = intel_encoder->enc.dev; |
a4fc5ed6 KP |
230 | struct drm_i915_private *dev_priv = dev->dev_private; |
231 | uint32_t ch_ctl = output_reg + 0x10; | |
232 | uint32_t ch_data = ch_ctl + 4; | |
233 | int i; | |
234 | int recv_bytes; | |
235 | uint32_t ctl; | |
236 | uint32_t status; | |
fb0f8fbf | 237 | uint32_t aux_clock_divider; |
e3421a18 | 238 | int try, precharge; |
a4fc5ed6 KP |
239 | |
240 | /* The clock divider is based off the hrawclk, | |
fb0f8fbf KP |
241 | * and would like to run at 2MHz. So, take the |
242 | * hrawclk value and divide by 2 and use that | |
a4fc5ed6 | 243 | */ |
e3421a18 ZW |
244 | if (IS_eDP(intel_encoder)) { |
245 | if (IS_GEN6(dev)) | |
246 | aux_clock_divider = 200; /* SNB eDP input clock at 400Mhz */ | |
247 | else | |
248 | aux_clock_divider = 225; /* eDP input clock at 450Mhz */ | |
249 | } else if (HAS_PCH_SPLIT(dev)) | |
f2b115e6 | 250 | aux_clock_divider = 62; /* IRL input clock fixed at 125Mhz */ |
5eb08b69 ZW |
251 | else |
252 | aux_clock_divider = intel_hrawclk(dev) / 2; | |
253 | ||
e3421a18 ZW |
254 | if (IS_GEN6(dev)) |
255 | precharge = 3; | |
256 | else | |
257 | precharge = 5; | |
258 | ||
fb0f8fbf KP |
259 | /* Must try at least 3 times according to DP spec */ |
260 | for (try = 0; try < 5; try++) { | |
261 | /* Load the send data into the aux channel data registers */ | |
262 | for (i = 0; i < send_bytes; i += 4) { | |
a419aef8 | 263 | uint32_t d = pack_aux(send + i, send_bytes - i); |
fb0f8fbf KP |
264 | |
265 | I915_WRITE(ch_data + i, d); | |
266 | } | |
267 | ||
268 | ctl = (DP_AUX_CH_CTL_SEND_BUSY | | |
269 | DP_AUX_CH_CTL_TIME_OUT_400us | | |
270 | (send_bytes << DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT) | | |
e3421a18 | 271 | (precharge << DP_AUX_CH_CTL_PRECHARGE_2US_SHIFT) | |
fb0f8fbf KP |
272 | (aux_clock_divider << DP_AUX_CH_CTL_BIT_CLOCK_2X_SHIFT) | |
273 | DP_AUX_CH_CTL_DONE | | |
274 | DP_AUX_CH_CTL_TIME_OUT_ERROR | | |
275 | DP_AUX_CH_CTL_RECEIVE_ERROR); | |
276 | ||
277 | /* Send the command and wait for it to complete */ | |
278 | I915_WRITE(ch_ctl, ctl); | |
279 | (void) I915_READ(ch_ctl); | |
280 | for (;;) { | |
281 | udelay(100); | |
282 | status = I915_READ(ch_ctl); | |
283 | if ((status & DP_AUX_CH_CTL_SEND_BUSY) == 0) | |
284 | break; | |
285 | } | |
286 | ||
287 | /* Clear done status and any errors */ | |
eebc863e | 288 | I915_WRITE(ch_ctl, (status | |
fb0f8fbf KP |
289 | DP_AUX_CH_CTL_DONE | |
290 | DP_AUX_CH_CTL_TIME_OUT_ERROR | | |
291 | DP_AUX_CH_CTL_RECEIVE_ERROR)); | |
292 | (void) I915_READ(ch_ctl); | |
293 | if ((status & DP_AUX_CH_CTL_TIME_OUT_ERROR) == 0) | |
a4fc5ed6 KP |
294 | break; |
295 | } | |
296 | ||
a4fc5ed6 | 297 | if ((status & DP_AUX_CH_CTL_DONE) == 0) { |
1ae8c0a5 | 298 | DRM_ERROR("dp_aux_ch not done status 0x%08x\n", status); |
a5b3da54 | 299 | return -EBUSY; |
a4fc5ed6 KP |
300 | } |
301 | ||
302 | /* Check for timeout or receive error. | |
303 | * Timeouts occur when the sink is not connected | |
304 | */ | |
a5b3da54 | 305 | if (status & DP_AUX_CH_CTL_RECEIVE_ERROR) { |
1ae8c0a5 | 306 | DRM_ERROR("dp_aux_ch receive error status 0x%08x\n", status); |
a5b3da54 KP |
307 | return -EIO; |
308 | } | |
1ae8c0a5 KP |
309 | |
310 | /* Timeouts occur when the device isn't connected, so they're | |
311 | * "normal" -- don't fill the kernel log with these */ | |
a5b3da54 | 312 | if (status & DP_AUX_CH_CTL_TIME_OUT_ERROR) { |
28c97730 | 313 | DRM_DEBUG_KMS("dp_aux_ch timeout status 0x%08x\n", status); |
a5b3da54 | 314 | return -ETIMEDOUT; |
a4fc5ed6 KP |
315 | } |
316 | ||
317 | /* Unload any bytes sent back from the other side */ | |
318 | recv_bytes = ((status & DP_AUX_CH_CTL_MESSAGE_SIZE_MASK) >> | |
319 | DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT); | |
320 | ||
321 | if (recv_bytes > recv_size) | |
322 | recv_bytes = recv_size; | |
323 | ||
324 | for (i = 0; i < recv_bytes; i += 4) { | |
325 | uint32_t d = I915_READ(ch_data + i); | |
326 | ||
327 | unpack_aux(d, recv + i, recv_bytes - i); | |
328 | } | |
329 | ||
330 | return recv_bytes; | |
331 | } | |
332 | ||
333 | /* Write data to the aux channel in native mode */ | |
334 | static int | |
21d40d37 | 335 | intel_dp_aux_native_write(struct intel_encoder *intel_encoder, |
a4fc5ed6 KP |
336 | uint16_t address, uint8_t *send, int send_bytes) |
337 | { | |
338 | int ret; | |
339 | uint8_t msg[20]; | |
340 | int msg_bytes; | |
341 | uint8_t ack; | |
342 | ||
343 | if (send_bytes > 16) | |
344 | return -1; | |
345 | msg[0] = AUX_NATIVE_WRITE << 4; | |
346 | msg[1] = address >> 8; | |
eebc863e | 347 | msg[2] = address & 0xff; |
a4fc5ed6 KP |
348 | msg[3] = send_bytes - 1; |
349 | memcpy(&msg[4], send, send_bytes); | |
350 | msg_bytes = send_bytes + 4; | |
351 | for (;;) { | |
21d40d37 | 352 | ret = intel_dp_aux_ch(intel_encoder, msg, msg_bytes, &ack, 1); |
a4fc5ed6 KP |
353 | if (ret < 0) |
354 | return ret; | |
355 | if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_ACK) | |
356 | break; | |
357 | else if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_DEFER) | |
358 | udelay(100); | |
359 | else | |
a5b3da54 | 360 | return -EIO; |
a4fc5ed6 KP |
361 | } |
362 | return send_bytes; | |
363 | } | |
364 | ||
365 | /* Write a single byte to the aux channel in native mode */ | |
366 | static int | |
21d40d37 | 367 | intel_dp_aux_native_write_1(struct intel_encoder *intel_encoder, |
a4fc5ed6 KP |
368 | uint16_t address, uint8_t byte) |
369 | { | |
21d40d37 | 370 | return intel_dp_aux_native_write(intel_encoder, address, &byte, 1); |
a4fc5ed6 KP |
371 | } |
372 | ||
373 | /* read bytes from a native aux channel */ | |
374 | static int | |
21d40d37 | 375 | intel_dp_aux_native_read(struct intel_encoder *intel_encoder, |
a4fc5ed6 KP |
376 | uint16_t address, uint8_t *recv, int recv_bytes) |
377 | { | |
378 | uint8_t msg[4]; | |
379 | int msg_bytes; | |
380 | uint8_t reply[20]; | |
381 | int reply_bytes; | |
382 | uint8_t ack; | |
383 | int ret; | |
384 | ||
385 | msg[0] = AUX_NATIVE_READ << 4; | |
386 | msg[1] = address >> 8; | |
387 | msg[2] = address & 0xff; | |
388 | msg[3] = recv_bytes - 1; | |
389 | ||
390 | msg_bytes = 4; | |
391 | reply_bytes = recv_bytes + 1; | |
392 | ||
393 | for (;;) { | |
21d40d37 | 394 | ret = intel_dp_aux_ch(intel_encoder, msg, msg_bytes, |
a4fc5ed6 | 395 | reply, reply_bytes); |
a5b3da54 KP |
396 | if (ret == 0) |
397 | return -EPROTO; | |
398 | if (ret < 0) | |
a4fc5ed6 KP |
399 | return ret; |
400 | ack = reply[0]; | |
401 | if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_ACK) { | |
402 | memcpy(recv, reply + 1, ret - 1); | |
403 | return ret - 1; | |
404 | } | |
405 | else if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_DEFER) | |
406 | udelay(100); | |
407 | else | |
a5b3da54 | 408 | return -EIO; |
a4fc5ed6 KP |
409 | } |
410 | } | |
411 | ||
412 | static int | |
ab2c0672 DA |
413 | intel_dp_i2c_aux_ch(struct i2c_adapter *adapter, int mode, |
414 | uint8_t write_byte, uint8_t *read_byte) | |
a4fc5ed6 | 415 | { |
ab2c0672 | 416 | struct i2c_algo_dp_aux_data *algo_data = adapter->algo_data; |
a4fc5ed6 KP |
417 | struct intel_dp_priv *dp_priv = container_of(adapter, |
418 | struct intel_dp_priv, | |
419 | adapter); | |
21d40d37 | 420 | struct intel_encoder *intel_encoder = dp_priv->intel_encoder; |
ab2c0672 DA |
421 | uint16_t address = algo_data->address; |
422 | uint8_t msg[5]; | |
423 | uint8_t reply[2]; | |
424 | int msg_bytes; | |
425 | int reply_bytes; | |
426 | int ret; | |
427 | ||
428 | /* Set up the command byte */ | |
429 | if (mode & MODE_I2C_READ) | |
430 | msg[0] = AUX_I2C_READ << 4; | |
431 | else | |
432 | msg[0] = AUX_I2C_WRITE << 4; | |
433 | ||
434 | if (!(mode & MODE_I2C_STOP)) | |
435 | msg[0] |= AUX_I2C_MOT << 4; | |
a4fc5ed6 | 436 | |
ab2c0672 DA |
437 | msg[1] = address >> 8; |
438 | msg[2] = address; | |
439 | ||
440 | switch (mode) { | |
441 | case MODE_I2C_WRITE: | |
442 | msg[3] = 0; | |
443 | msg[4] = write_byte; | |
444 | msg_bytes = 5; | |
445 | reply_bytes = 1; | |
446 | break; | |
447 | case MODE_I2C_READ: | |
448 | msg[3] = 0; | |
449 | msg_bytes = 4; | |
450 | reply_bytes = 2; | |
451 | break; | |
452 | default: | |
453 | msg_bytes = 3; | |
454 | reply_bytes = 1; | |
455 | break; | |
456 | } | |
457 | ||
458 | for (;;) { | |
21d40d37 | 459 | ret = intel_dp_aux_ch(intel_encoder, |
ab2c0672 DA |
460 | msg, msg_bytes, |
461 | reply, reply_bytes); | |
462 | if (ret < 0) { | |
3ff99164 | 463 | DRM_DEBUG_KMS("aux_ch failed %d\n", ret); |
ab2c0672 DA |
464 | return ret; |
465 | } | |
466 | switch (reply[0] & AUX_I2C_REPLY_MASK) { | |
467 | case AUX_I2C_REPLY_ACK: | |
468 | if (mode == MODE_I2C_READ) { | |
469 | *read_byte = reply[1]; | |
470 | } | |
471 | return reply_bytes - 1; | |
472 | case AUX_I2C_REPLY_NACK: | |
3ff99164 | 473 | DRM_DEBUG_KMS("aux_ch nack\n"); |
ab2c0672 DA |
474 | return -EREMOTEIO; |
475 | case AUX_I2C_REPLY_DEFER: | |
3ff99164 | 476 | DRM_DEBUG_KMS("aux_ch defer\n"); |
ab2c0672 DA |
477 | udelay(100); |
478 | break; | |
479 | default: | |
480 | DRM_ERROR("aux_ch invalid reply 0x%02x\n", reply[0]); | |
481 | return -EREMOTEIO; | |
482 | } | |
483 | } | |
a4fc5ed6 KP |
484 | } |
485 | ||
486 | static int | |
55f78c43 ZW |
487 | intel_dp_i2c_init(struct intel_encoder *intel_encoder, |
488 | struct intel_connector *intel_connector, const char *name) | |
a4fc5ed6 | 489 | { |
21d40d37 | 490 | struct intel_dp_priv *dp_priv = intel_encoder->dev_priv; |
a4fc5ed6 | 491 | |
d54e9d28 | 492 | DRM_DEBUG_KMS("i2c_init %s\n", name); |
a4fc5ed6 KP |
493 | dp_priv->algo.running = false; |
494 | dp_priv->algo.address = 0; | |
495 | dp_priv->algo.aux_ch = intel_dp_i2c_aux_ch; | |
496 | ||
497 | memset(&dp_priv->adapter, '\0', sizeof (dp_priv->adapter)); | |
498 | dp_priv->adapter.owner = THIS_MODULE; | |
499 | dp_priv->adapter.class = I2C_CLASS_DDC; | |
eebc863e ZW |
500 | strncpy (dp_priv->adapter.name, name, sizeof(dp_priv->adapter.name) - 1); |
501 | dp_priv->adapter.name[sizeof(dp_priv->adapter.name) - 1] = '\0'; | |
a4fc5ed6 | 502 | dp_priv->adapter.algo_data = &dp_priv->algo; |
55f78c43 | 503 | dp_priv->adapter.dev.parent = &intel_connector->base.kdev; |
a4fc5ed6 KP |
504 | |
505 | return i2c_dp_aux_add_bus(&dp_priv->adapter); | |
506 | } | |
507 | ||
508 | static bool | |
509 | intel_dp_mode_fixup(struct drm_encoder *encoder, struct drm_display_mode *mode, | |
510 | struct drm_display_mode *adjusted_mode) | |
511 | { | |
21d40d37 EA |
512 | struct intel_encoder *intel_encoder = enc_to_intel_encoder(encoder); |
513 | struct intel_dp_priv *dp_priv = intel_encoder->dev_priv; | |
0d3a1bee ZY |
514 | struct drm_device *dev = encoder->dev; |
515 | struct drm_i915_private *dev_priv = dev->dev_private; | |
a4fc5ed6 | 516 | int lane_count, clock; |
21d40d37 EA |
517 | int max_lane_count = intel_dp_max_lane_count(intel_encoder); |
518 | int max_clock = intel_dp_max_link_bw(intel_encoder) == DP_LINK_BW_2_7 ? 1 : 0; | |
a4fc5ed6 KP |
519 | static int bws[2] = { DP_LINK_BW_1_62, DP_LINK_BW_2_7 }; |
520 | ||
0d3a1bee ZY |
521 | if ((IS_eDP(intel_encoder) || IS_PCH_eDP(dp_priv)) && |
522 | dev_priv->panel_fixed_mode) { | |
523 | struct drm_display_mode *fixed_mode = dev_priv->panel_fixed_mode; | |
524 | ||
525 | adjusted_mode->hdisplay = fixed_mode->hdisplay; | |
526 | adjusted_mode->hsync_start = fixed_mode->hsync_start; | |
527 | adjusted_mode->hsync_end = fixed_mode->hsync_end; | |
528 | adjusted_mode->htotal = fixed_mode->htotal; | |
529 | ||
530 | adjusted_mode->vdisplay = fixed_mode->vdisplay; | |
531 | adjusted_mode->vsync_start = fixed_mode->vsync_start; | |
532 | adjusted_mode->vsync_end = fixed_mode->vsync_end; | |
533 | adjusted_mode->vtotal = fixed_mode->vtotal; | |
534 | ||
535 | adjusted_mode->clock = fixed_mode->clock; | |
536 | drm_mode_set_crtcinfo(adjusted_mode, CRTC_INTERLACE_HALVE_V); | |
537 | ||
538 | /* | |
539 | * the mode->clock is used to calculate the Data&Link M/N | |
540 | * of the pipe. For the eDP the fixed clock should be used. | |
541 | */ | |
542 | mode->clock = dev_priv->panel_fixed_mode->clock; | |
543 | } | |
544 | ||
a4fc5ed6 KP |
545 | for (lane_count = 1; lane_count <= max_lane_count; lane_count <<= 1) { |
546 | for (clock = 0; clock <= max_clock; clock++) { | |
fe27d53e | 547 | int link_avail = intel_dp_max_data_rate(intel_dp_link_clock(bws[clock]), lane_count); |
a4fc5ed6 | 548 | |
21d40d37 | 549 | if (intel_dp_link_required(encoder->dev, intel_encoder, mode->clock) |
885a5fb5 | 550 | <= link_avail) { |
a4fc5ed6 KP |
551 | dp_priv->link_bw = bws[clock]; |
552 | dp_priv->lane_count = lane_count; | |
553 | adjusted_mode->clock = intel_dp_link_clock(dp_priv->link_bw); | |
28c97730 ZY |
554 | DRM_DEBUG_KMS("Display port link bw %02x lane " |
555 | "count %d clock %d\n", | |
a4fc5ed6 KP |
556 | dp_priv->link_bw, dp_priv->lane_count, |
557 | adjusted_mode->clock); | |
558 | return true; | |
559 | } | |
560 | } | |
561 | } | |
fe27d53e | 562 | |
4f444071 | 563 | if (IS_eDP(intel_encoder) || IS_PCH_eDP(dp_priv)) { |
fe27d53e DA |
564 | /* okay we failed just pick the highest */ |
565 | dp_priv->lane_count = max_lane_count; | |
566 | dp_priv->link_bw = bws[max_clock]; | |
567 | adjusted_mode->clock = intel_dp_link_clock(dp_priv->link_bw); | |
568 | DRM_DEBUG_KMS("Force picking display port link bw %02x lane " | |
569 | "count %d clock %d\n", | |
570 | dp_priv->link_bw, dp_priv->lane_count, | |
571 | adjusted_mode->clock); | |
572 | return true; | |
573 | } | |
a4fc5ed6 KP |
574 | return false; |
575 | } | |
576 | ||
577 | struct intel_dp_m_n { | |
578 | uint32_t tu; | |
579 | uint32_t gmch_m; | |
580 | uint32_t gmch_n; | |
581 | uint32_t link_m; | |
582 | uint32_t link_n; | |
583 | }; | |
584 | ||
585 | static void | |
586 | intel_reduce_ratio(uint32_t *num, uint32_t *den) | |
587 | { | |
588 | while (*num > 0xffffff || *den > 0xffffff) { | |
589 | *num >>= 1; | |
590 | *den >>= 1; | |
591 | } | |
592 | } | |
593 | ||
594 | static void | |
36e83a18 | 595 | intel_dp_compute_m_n(int bpp, |
a4fc5ed6 KP |
596 | int nlanes, |
597 | int pixel_clock, | |
598 | int link_clock, | |
599 | struct intel_dp_m_n *m_n) | |
600 | { | |
601 | m_n->tu = 64; | |
36e83a18 | 602 | m_n->gmch_m = (pixel_clock * bpp) >> 3; |
a4fc5ed6 KP |
603 | m_n->gmch_n = link_clock * nlanes; |
604 | intel_reduce_ratio(&m_n->gmch_m, &m_n->gmch_n); | |
605 | m_n->link_m = pixel_clock; | |
606 | m_n->link_n = link_clock; | |
607 | intel_reduce_ratio(&m_n->link_m, &m_n->link_n); | |
608 | } | |
609 | ||
36e83a18 ZY |
610 | bool intel_pch_has_edp(struct drm_crtc *crtc) |
611 | { | |
612 | struct drm_device *dev = crtc->dev; | |
613 | struct drm_mode_config *mode_config = &dev->mode_config; | |
614 | struct drm_encoder *encoder; | |
615 | ||
616 | list_for_each_entry(encoder, &mode_config->encoder_list, head) { | |
617 | struct intel_encoder *intel_encoder; | |
618 | struct intel_dp_priv *dp_priv; | |
619 | ||
620 | if (!encoder || encoder->crtc != crtc) | |
621 | continue; | |
622 | ||
623 | intel_encoder = enc_to_intel_encoder(encoder); | |
624 | dp_priv = intel_encoder->dev_priv; | |
625 | ||
626 | if (intel_encoder->type == INTEL_OUTPUT_DISPLAYPORT) | |
f0917379 | 627 | return dp_priv->is_pch_edp; |
36e83a18 ZY |
628 | } |
629 | return false; | |
630 | } | |
631 | ||
a4fc5ed6 KP |
632 | void |
633 | intel_dp_set_m_n(struct drm_crtc *crtc, struct drm_display_mode *mode, | |
634 | struct drm_display_mode *adjusted_mode) | |
635 | { | |
636 | struct drm_device *dev = crtc->dev; | |
637 | struct drm_mode_config *mode_config = &dev->mode_config; | |
55f78c43 | 638 | struct drm_encoder *encoder; |
a4fc5ed6 KP |
639 | struct drm_i915_private *dev_priv = dev->dev_private; |
640 | struct intel_crtc *intel_crtc = to_intel_crtc(crtc); | |
36e83a18 | 641 | int lane_count = 4, bpp = 24; |
a4fc5ed6 KP |
642 | struct intel_dp_m_n m_n; |
643 | ||
644 | /* | |
21d40d37 | 645 | * Find the lane count in the intel_encoder private |
a4fc5ed6 | 646 | */ |
55f78c43 ZW |
647 | list_for_each_entry(encoder, &mode_config->encoder_list, head) { |
648 | struct intel_encoder *intel_encoder; | |
649 | struct intel_dp_priv *dp_priv; | |
a4fc5ed6 | 650 | |
d8201ab6 | 651 | if (encoder->crtc != crtc) |
a4fc5ed6 KP |
652 | continue; |
653 | ||
55f78c43 ZW |
654 | intel_encoder = enc_to_intel_encoder(encoder); |
655 | dp_priv = intel_encoder->dev_priv; | |
656 | ||
21d40d37 | 657 | if (intel_encoder->type == INTEL_OUTPUT_DISPLAYPORT) { |
a4fc5ed6 | 658 | lane_count = dp_priv->lane_count; |
36e83a18 ZY |
659 | if (IS_PCH_eDP(dp_priv)) |
660 | bpp = dev_priv->edp_bpp; | |
a4fc5ed6 KP |
661 | break; |
662 | } | |
663 | } | |
664 | ||
665 | /* | |
666 | * Compute the GMCH and Link ratios. The '3' here is | |
667 | * the number of bytes_per_pixel post-LUT, which we always | |
668 | * set up for 8-bits of R/G/B, or 3 bytes total. | |
669 | */ | |
36e83a18 | 670 | intel_dp_compute_m_n(bpp, lane_count, |
a4fc5ed6 KP |
671 | mode->clock, adjusted_mode->clock, &m_n); |
672 | ||
c619eed4 | 673 | if (HAS_PCH_SPLIT(dev)) { |
5eb08b69 ZW |
674 | if (intel_crtc->pipe == 0) { |
675 | I915_WRITE(TRANSA_DATA_M1, | |
676 | ((m_n.tu - 1) << PIPE_GMCH_DATA_M_TU_SIZE_SHIFT) | | |
677 | m_n.gmch_m); | |
678 | I915_WRITE(TRANSA_DATA_N1, m_n.gmch_n); | |
679 | I915_WRITE(TRANSA_DP_LINK_M1, m_n.link_m); | |
680 | I915_WRITE(TRANSA_DP_LINK_N1, m_n.link_n); | |
681 | } else { | |
682 | I915_WRITE(TRANSB_DATA_M1, | |
683 | ((m_n.tu - 1) << PIPE_GMCH_DATA_M_TU_SIZE_SHIFT) | | |
684 | m_n.gmch_m); | |
685 | I915_WRITE(TRANSB_DATA_N1, m_n.gmch_n); | |
686 | I915_WRITE(TRANSB_DP_LINK_M1, m_n.link_m); | |
687 | I915_WRITE(TRANSB_DP_LINK_N1, m_n.link_n); | |
688 | } | |
a4fc5ed6 | 689 | } else { |
5eb08b69 ZW |
690 | if (intel_crtc->pipe == 0) { |
691 | I915_WRITE(PIPEA_GMCH_DATA_M, | |
692 | ((m_n.tu - 1) << PIPE_GMCH_DATA_M_TU_SIZE_SHIFT) | | |
693 | m_n.gmch_m); | |
694 | I915_WRITE(PIPEA_GMCH_DATA_N, | |
695 | m_n.gmch_n); | |
696 | I915_WRITE(PIPEA_DP_LINK_M, m_n.link_m); | |
697 | I915_WRITE(PIPEA_DP_LINK_N, m_n.link_n); | |
698 | } else { | |
699 | I915_WRITE(PIPEB_GMCH_DATA_M, | |
700 | ((m_n.tu - 1) << PIPE_GMCH_DATA_M_TU_SIZE_SHIFT) | | |
701 | m_n.gmch_m); | |
702 | I915_WRITE(PIPEB_GMCH_DATA_N, | |
703 | m_n.gmch_n); | |
704 | I915_WRITE(PIPEB_DP_LINK_M, m_n.link_m); | |
705 | I915_WRITE(PIPEB_DP_LINK_N, m_n.link_n); | |
706 | } | |
a4fc5ed6 KP |
707 | } |
708 | } | |
709 | ||
710 | static void | |
711 | intel_dp_mode_set(struct drm_encoder *encoder, struct drm_display_mode *mode, | |
712 | struct drm_display_mode *adjusted_mode) | |
713 | { | |
e3421a18 | 714 | struct drm_device *dev = encoder->dev; |
21d40d37 EA |
715 | struct intel_encoder *intel_encoder = enc_to_intel_encoder(encoder); |
716 | struct intel_dp_priv *dp_priv = intel_encoder->dev_priv; | |
717 | struct drm_crtc *crtc = intel_encoder->enc.crtc; | |
a4fc5ed6 KP |
718 | struct intel_crtc *intel_crtc = to_intel_crtc(crtc); |
719 | ||
e3421a18 | 720 | dp_priv->DP = (DP_VOLTAGE_0_4 | |
9c9e7927 AJ |
721 | DP_PRE_EMPHASIS_0); |
722 | ||
723 | if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC) | |
724 | dp_priv->DP |= DP_SYNC_HS_HIGH; | |
725 | if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC) | |
726 | dp_priv->DP |= DP_SYNC_VS_HIGH; | |
a4fc5ed6 | 727 | |
e3421a18 ZW |
728 | if (HAS_PCH_CPT(dev) && !IS_eDP(intel_encoder)) |
729 | dp_priv->DP |= DP_LINK_TRAIN_OFF_CPT; | |
730 | else | |
731 | dp_priv->DP |= DP_LINK_TRAIN_OFF; | |
a4fc5ed6 KP |
732 | |
733 | switch (dp_priv->lane_count) { | |
734 | case 1: | |
735 | dp_priv->DP |= DP_PORT_WIDTH_1; | |
736 | break; | |
737 | case 2: | |
738 | dp_priv->DP |= DP_PORT_WIDTH_2; | |
739 | break; | |
740 | case 4: | |
741 | dp_priv->DP |= DP_PORT_WIDTH_4; | |
742 | break; | |
743 | } | |
744 | if (dp_priv->has_audio) | |
745 | dp_priv->DP |= DP_AUDIO_OUTPUT_ENABLE; | |
746 | ||
747 | memset(dp_priv->link_configuration, 0, DP_LINK_CONFIGURATION_SIZE); | |
748 | dp_priv->link_configuration[0] = dp_priv->link_bw; | |
749 | dp_priv->link_configuration[1] = dp_priv->lane_count; | |
750 | ||
751 | /* | |
9962c925 | 752 | * Check for DPCD version > 1.1 and enhanced framing support |
a4fc5ed6 | 753 | */ |
9962c925 | 754 | if (dp_priv->dpcd[0] >= 0x11 && (dp_priv->dpcd[2] & DP_ENHANCED_FRAME_CAP)) { |
a4fc5ed6 KP |
755 | dp_priv->link_configuration[1] |= DP_LANE_COUNT_ENHANCED_FRAME_EN; |
756 | dp_priv->DP |= DP_ENHANCED_FRAMING; | |
757 | } | |
758 | ||
e3421a18 ZW |
759 | /* CPT DP's pipe select is decided in TRANS_DP_CTL */ |
760 | if (intel_crtc->pipe == 1 && !HAS_PCH_CPT(dev)) | |
a4fc5ed6 | 761 | dp_priv->DP |= DP_PIPEB_SELECT; |
32f9d658 | 762 | |
21d40d37 | 763 | if (IS_eDP(intel_encoder)) { |
32f9d658 ZW |
764 | /* don't miss out required setting for eDP */ |
765 | dp_priv->DP |= DP_PLL_ENABLE; | |
766 | if (adjusted_mode->clock < 200000) | |
767 | dp_priv->DP |= DP_PLL_FREQ_160MHZ; | |
768 | else | |
769 | dp_priv->DP |= DP_PLL_FREQ_270MHZ; | |
770 | } | |
a4fc5ed6 KP |
771 | } |
772 | ||
9934c132 JB |
773 | static void ironlake_edp_panel_on (struct drm_device *dev) |
774 | { | |
775 | struct drm_i915_private *dev_priv = dev->dev_private; | |
776 | unsigned long timeout = jiffies + msecs_to_jiffies(5000); | |
777 | u32 pp, pp_status; | |
778 | ||
779 | pp_status = I915_READ(PCH_PP_STATUS); | |
780 | if (pp_status & PP_ON) | |
781 | return; | |
782 | ||
783 | pp = I915_READ(PCH_PP_CONTROL); | |
784 | pp |= PANEL_UNLOCK_REGS | POWER_TARGET_ON; | |
785 | I915_WRITE(PCH_PP_CONTROL, pp); | |
786 | do { | |
787 | pp_status = I915_READ(PCH_PP_STATUS); | |
788 | } while (((pp_status & PP_ON) == 0) && !time_after(jiffies, timeout)); | |
789 | ||
790 | if (time_after(jiffies, timeout)) | |
791 | DRM_DEBUG_KMS("panel on wait timed out: 0x%08x\n", pp_status); | |
792 | ||
793 | pp &= ~(PANEL_UNLOCK_REGS | EDP_FORCE_VDD); | |
794 | I915_WRITE(PCH_PP_CONTROL, pp); | |
795 | } | |
796 | ||
797 | static void ironlake_edp_panel_off (struct drm_device *dev) | |
798 | { | |
799 | struct drm_i915_private *dev_priv = dev->dev_private; | |
800 | unsigned long timeout = jiffies + msecs_to_jiffies(5000); | |
801 | u32 pp, pp_status; | |
802 | ||
803 | pp = I915_READ(PCH_PP_CONTROL); | |
804 | pp &= ~POWER_TARGET_ON; | |
805 | I915_WRITE(PCH_PP_CONTROL, pp); | |
806 | do { | |
807 | pp_status = I915_READ(PCH_PP_STATUS); | |
808 | } while ((pp_status & PP_ON) && !time_after(jiffies, timeout)); | |
809 | ||
810 | if (time_after(jiffies, timeout)) | |
811 | DRM_DEBUG_KMS("panel off wait timed out\n"); | |
812 | ||
813 | /* Make sure VDD is enabled so DP AUX will work */ | |
814 | pp |= EDP_FORCE_VDD; | |
815 | I915_WRITE(PCH_PP_CONTROL, pp); | |
816 | } | |
817 | ||
f2b115e6 | 818 | static void ironlake_edp_backlight_on (struct drm_device *dev) |
32f9d658 ZW |
819 | { |
820 | struct drm_i915_private *dev_priv = dev->dev_private; | |
821 | u32 pp; | |
822 | ||
28c97730 | 823 | DRM_DEBUG_KMS("\n"); |
32f9d658 ZW |
824 | pp = I915_READ(PCH_PP_CONTROL); |
825 | pp |= EDP_BLC_ENABLE; | |
826 | I915_WRITE(PCH_PP_CONTROL, pp); | |
827 | } | |
828 | ||
f2b115e6 | 829 | static void ironlake_edp_backlight_off (struct drm_device *dev) |
32f9d658 ZW |
830 | { |
831 | struct drm_i915_private *dev_priv = dev->dev_private; | |
832 | u32 pp; | |
833 | ||
28c97730 | 834 | DRM_DEBUG_KMS("\n"); |
32f9d658 ZW |
835 | pp = I915_READ(PCH_PP_CONTROL); |
836 | pp &= ~EDP_BLC_ENABLE; | |
837 | I915_WRITE(PCH_PP_CONTROL, pp); | |
838 | } | |
a4fc5ed6 KP |
839 | |
840 | static void | |
841 | intel_dp_dpms(struct drm_encoder *encoder, int mode) | |
842 | { | |
21d40d37 EA |
843 | struct intel_encoder *intel_encoder = enc_to_intel_encoder(encoder); |
844 | struct intel_dp_priv *dp_priv = intel_encoder->dev_priv; | |
55f78c43 | 845 | struct drm_device *dev = encoder->dev; |
a4fc5ed6 KP |
846 | struct drm_i915_private *dev_priv = dev->dev_private; |
847 | uint32_t dp_reg = I915_READ(dp_priv->output_reg); | |
848 | ||
849 | if (mode != DRM_MODE_DPMS_ON) { | |
32f9d658 | 850 | if (dp_reg & DP_PORT_EN) { |
21d40d37 | 851 | intel_dp_link_down(intel_encoder, dp_priv->DP); |
2bd34f6c | 852 | if (IS_eDP(intel_encoder) || IS_PCH_eDP(dp_priv)) { |
f2b115e6 | 853 | ironlake_edp_backlight_off(dev); |
5620ae29 | 854 | ironlake_edp_panel_off(dev); |
9934c132 | 855 | } |
32f9d658 | 856 | } |
a4fc5ed6 | 857 | } else { |
32f9d658 | 858 | if (!(dp_reg & DP_PORT_EN)) { |
21d40d37 | 859 | intel_dp_link_train(intel_encoder, dp_priv->DP, dp_priv->link_configuration); |
2bd34f6c | 860 | if (IS_eDP(intel_encoder) || IS_PCH_eDP(dp_priv)) { |
9934c132 | 861 | ironlake_edp_panel_on(dev); |
f2b115e6 | 862 | ironlake_edp_backlight_on(dev); |
9934c132 | 863 | } |
32f9d658 | 864 | } |
a4fc5ed6 | 865 | } |
c8110e52 | 866 | dp_priv->dpms_mode = mode; |
a4fc5ed6 KP |
867 | } |
868 | ||
869 | /* | |
870 | * Fetch AUX CH registers 0x202 - 0x207 which contain | |
871 | * link status information | |
872 | */ | |
873 | static bool | |
21d40d37 | 874 | intel_dp_get_link_status(struct intel_encoder *intel_encoder, |
a4fc5ed6 KP |
875 | uint8_t link_status[DP_LINK_STATUS_SIZE]) |
876 | { | |
877 | int ret; | |
878 | ||
21d40d37 | 879 | ret = intel_dp_aux_native_read(intel_encoder, |
a4fc5ed6 KP |
880 | DP_LANE0_1_STATUS, |
881 | link_status, DP_LINK_STATUS_SIZE); | |
882 | if (ret != DP_LINK_STATUS_SIZE) | |
883 | return false; | |
884 | return true; | |
885 | } | |
886 | ||
887 | static uint8_t | |
888 | intel_dp_link_status(uint8_t link_status[DP_LINK_STATUS_SIZE], | |
889 | int r) | |
890 | { | |
891 | return link_status[r - DP_LANE0_1_STATUS]; | |
892 | } | |
893 | ||
a4fc5ed6 KP |
894 | static uint8_t |
895 | intel_get_adjust_request_voltage(uint8_t link_status[DP_LINK_STATUS_SIZE], | |
896 | int lane) | |
897 | { | |
898 | int i = DP_ADJUST_REQUEST_LANE0_1 + (lane >> 1); | |
899 | int s = ((lane & 1) ? | |
900 | DP_ADJUST_VOLTAGE_SWING_LANE1_SHIFT : | |
901 | DP_ADJUST_VOLTAGE_SWING_LANE0_SHIFT); | |
902 | uint8_t l = intel_dp_link_status(link_status, i); | |
903 | ||
904 | return ((l >> s) & 3) << DP_TRAIN_VOLTAGE_SWING_SHIFT; | |
905 | } | |
906 | ||
907 | static uint8_t | |
908 | intel_get_adjust_request_pre_emphasis(uint8_t link_status[DP_LINK_STATUS_SIZE], | |
909 | int lane) | |
910 | { | |
911 | int i = DP_ADJUST_REQUEST_LANE0_1 + (lane >> 1); | |
912 | int s = ((lane & 1) ? | |
913 | DP_ADJUST_PRE_EMPHASIS_LANE1_SHIFT : | |
914 | DP_ADJUST_PRE_EMPHASIS_LANE0_SHIFT); | |
915 | uint8_t l = intel_dp_link_status(link_status, i); | |
916 | ||
917 | return ((l >> s) & 3) << DP_TRAIN_PRE_EMPHASIS_SHIFT; | |
918 | } | |
919 | ||
920 | ||
921 | #if 0 | |
922 | static char *voltage_names[] = { | |
923 | "0.4V", "0.6V", "0.8V", "1.2V" | |
924 | }; | |
925 | static char *pre_emph_names[] = { | |
926 | "0dB", "3.5dB", "6dB", "9.5dB" | |
927 | }; | |
928 | static char *link_train_names[] = { | |
929 | "pattern 1", "pattern 2", "idle", "off" | |
930 | }; | |
931 | #endif | |
932 | ||
933 | /* | |
934 | * These are source-specific values; current Intel hardware supports | |
935 | * a maximum voltage of 800mV and a maximum pre-emphasis of 6dB | |
936 | */ | |
937 | #define I830_DP_VOLTAGE_MAX DP_TRAIN_VOLTAGE_SWING_800 | |
938 | ||
939 | static uint8_t | |
940 | intel_dp_pre_emphasis_max(uint8_t voltage_swing) | |
941 | { | |
942 | switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) { | |
943 | case DP_TRAIN_VOLTAGE_SWING_400: | |
944 | return DP_TRAIN_PRE_EMPHASIS_6; | |
945 | case DP_TRAIN_VOLTAGE_SWING_600: | |
946 | return DP_TRAIN_PRE_EMPHASIS_6; | |
947 | case DP_TRAIN_VOLTAGE_SWING_800: | |
948 | return DP_TRAIN_PRE_EMPHASIS_3_5; | |
949 | case DP_TRAIN_VOLTAGE_SWING_1200: | |
950 | default: | |
951 | return DP_TRAIN_PRE_EMPHASIS_0; | |
952 | } | |
953 | } | |
954 | ||
955 | static void | |
21d40d37 | 956 | intel_get_adjust_train(struct intel_encoder *intel_encoder, |
a4fc5ed6 KP |
957 | uint8_t link_status[DP_LINK_STATUS_SIZE], |
958 | int lane_count, | |
959 | uint8_t train_set[4]) | |
960 | { | |
961 | uint8_t v = 0; | |
962 | uint8_t p = 0; | |
963 | int lane; | |
964 | ||
965 | for (lane = 0; lane < lane_count; lane++) { | |
966 | uint8_t this_v = intel_get_adjust_request_voltage(link_status, lane); | |
967 | uint8_t this_p = intel_get_adjust_request_pre_emphasis(link_status, lane); | |
968 | ||
969 | if (this_v > v) | |
970 | v = this_v; | |
971 | if (this_p > p) | |
972 | p = this_p; | |
973 | } | |
974 | ||
975 | if (v >= I830_DP_VOLTAGE_MAX) | |
976 | v = I830_DP_VOLTAGE_MAX | DP_TRAIN_MAX_SWING_REACHED; | |
977 | ||
978 | if (p >= intel_dp_pre_emphasis_max(v)) | |
979 | p = intel_dp_pre_emphasis_max(v) | DP_TRAIN_MAX_PRE_EMPHASIS_REACHED; | |
980 | ||
981 | for (lane = 0; lane < 4; lane++) | |
982 | train_set[lane] = v | p; | |
983 | } | |
984 | ||
985 | static uint32_t | |
986 | intel_dp_signal_levels(uint8_t train_set, int lane_count) | |
987 | { | |
988 | uint32_t signal_levels = 0; | |
989 | ||
990 | switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) { | |
991 | case DP_TRAIN_VOLTAGE_SWING_400: | |
992 | default: | |
993 | signal_levels |= DP_VOLTAGE_0_4; | |
994 | break; | |
995 | case DP_TRAIN_VOLTAGE_SWING_600: | |
996 | signal_levels |= DP_VOLTAGE_0_6; | |
997 | break; | |
998 | case DP_TRAIN_VOLTAGE_SWING_800: | |
999 | signal_levels |= DP_VOLTAGE_0_8; | |
1000 | break; | |
1001 | case DP_TRAIN_VOLTAGE_SWING_1200: | |
1002 | signal_levels |= DP_VOLTAGE_1_2; | |
1003 | break; | |
1004 | } | |
1005 | switch (train_set & DP_TRAIN_PRE_EMPHASIS_MASK) { | |
1006 | case DP_TRAIN_PRE_EMPHASIS_0: | |
1007 | default: | |
1008 | signal_levels |= DP_PRE_EMPHASIS_0; | |
1009 | break; | |
1010 | case DP_TRAIN_PRE_EMPHASIS_3_5: | |
1011 | signal_levels |= DP_PRE_EMPHASIS_3_5; | |
1012 | break; | |
1013 | case DP_TRAIN_PRE_EMPHASIS_6: | |
1014 | signal_levels |= DP_PRE_EMPHASIS_6; | |
1015 | break; | |
1016 | case DP_TRAIN_PRE_EMPHASIS_9_5: | |
1017 | signal_levels |= DP_PRE_EMPHASIS_9_5; | |
1018 | break; | |
1019 | } | |
1020 | return signal_levels; | |
1021 | } | |
1022 | ||
e3421a18 ZW |
1023 | /* Gen6's DP voltage swing and pre-emphasis control */ |
1024 | static uint32_t | |
1025 | intel_gen6_edp_signal_levels(uint8_t train_set) | |
1026 | { | |
1027 | switch (train_set & (DP_TRAIN_VOLTAGE_SWING_MASK|DP_TRAIN_PRE_EMPHASIS_MASK)) { | |
1028 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_0: | |
1029 | return EDP_LINK_TRAIN_400MV_0DB_SNB_B; | |
1030 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_6: | |
1031 | return EDP_LINK_TRAIN_400MV_6DB_SNB_B; | |
1032 | case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_3_5: | |
1033 | return EDP_LINK_TRAIN_600MV_3_5DB_SNB_B; | |
1034 | case DP_TRAIN_VOLTAGE_SWING_800 | DP_TRAIN_PRE_EMPHASIS_0: | |
1035 | return EDP_LINK_TRAIN_800MV_0DB_SNB_B; | |
1036 | default: | |
1037 | DRM_DEBUG_KMS("Unsupported voltage swing/pre-emphasis level\n"); | |
1038 | return EDP_LINK_TRAIN_400MV_0DB_SNB_B; | |
1039 | } | |
1040 | } | |
1041 | ||
a4fc5ed6 KP |
1042 | static uint8_t |
1043 | intel_get_lane_status(uint8_t link_status[DP_LINK_STATUS_SIZE], | |
1044 | int lane) | |
1045 | { | |
1046 | int i = DP_LANE0_1_STATUS + (lane >> 1); | |
1047 | int s = (lane & 1) * 4; | |
1048 | uint8_t l = intel_dp_link_status(link_status, i); | |
1049 | ||
1050 | return (l >> s) & 0xf; | |
1051 | } | |
1052 | ||
1053 | /* Check for clock recovery is done on all channels */ | |
1054 | static bool | |
1055 | intel_clock_recovery_ok(uint8_t link_status[DP_LINK_STATUS_SIZE], int lane_count) | |
1056 | { | |
1057 | int lane; | |
1058 | uint8_t lane_status; | |
1059 | ||
1060 | for (lane = 0; lane < lane_count; lane++) { | |
1061 | lane_status = intel_get_lane_status(link_status, lane); | |
1062 | if ((lane_status & DP_LANE_CR_DONE) == 0) | |
1063 | return false; | |
1064 | } | |
1065 | return true; | |
1066 | } | |
1067 | ||
1068 | /* Check to see if channel eq is done on all channels */ | |
1069 | #define CHANNEL_EQ_BITS (DP_LANE_CR_DONE|\ | |
1070 | DP_LANE_CHANNEL_EQ_DONE|\ | |
1071 | DP_LANE_SYMBOL_LOCKED) | |
1072 | static bool | |
1073 | intel_channel_eq_ok(uint8_t link_status[DP_LINK_STATUS_SIZE], int lane_count) | |
1074 | { | |
1075 | uint8_t lane_align; | |
1076 | uint8_t lane_status; | |
1077 | int lane; | |
1078 | ||
1079 | lane_align = intel_dp_link_status(link_status, | |
1080 | DP_LANE_ALIGN_STATUS_UPDATED); | |
1081 | if ((lane_align & DP_INTERLANE_ALIGN_DONE) == 0) | |
1082 | return false; | |
1083 | for (lane = 0; lane < lane_count; lane++) { | |
1084 | lane_status = intel_get_lane_status(link_status, lane); | |
1085 | if ((lane_status & CHANNEL_EQ_BITS) != CHANNEL_EQ_BITS) | |
1086 | return false; | |
1087 | } | |
1088 | return true; | |
1089 | } | |
1090 | ||
1091 | static bool | |
21d40d37 | 1092 | intel_dp_set_link_train(struct intel_encoder *intel_encoder, |
a4fc5ed6 KP |
1093 | uint32_t dp_reg_value, |
1094 | uint8_t dp_train_pat, | |
1095 | uint8_t train_set[4], | |
1096 | bool first) | |
1097 | { | |
55f78c43 | 1098 | struct drm_device *dev = intel_encoder->enc.dev; |
a4fc5ed6 | 1099 | struct drm_i915_private *dev_priv = dev->dev_private; |
21d40d37 | 1100 | struct intel_dp_priv *dp_priv = intel_encoder->dev_priv; |
a4fc5ed6 KP |
1101 | int ret; |
1102 | ||
1103 | I915_WRITE(dp_priv->output_reg, dp_reg_value); | |
1104 | POSTING_READ(dp_priv->output_reg); | |
1105 | if (first) | |
1106 | intel_wait_for_vblank(dev); | |
1107 | ||
21d40d37 | 1108 | intel_dp_aux_native_write_1(intel_encoder, |
a4fc5ed6 KP |
1109 | DP_TRAINING_PATTERN_SET, |
1110 | dp_train_pat); | |
1111 | ||
21d40d37 | 1112 | ret = intel_dp_aux_native_write(intel_encoder, |
a4fc5ed6 KP |
1113 | DP_TRAINING_LANE0_SET, train_set, 4); |
1114 | if (ret != 4) | |
1115 | return false; | |
1116 | ||
1117 | return true; | |
1118 | } | |
1119 | ||
1120 | static void | |
21d40d37 | 1121 | intel_dp_link_train(struct intel_encoder *intel_encoder, uint32_t DP, |
a4fc5ed6 KP |
1122 | uint8_t link_configuration[DP_LINK_CONFIGURATION_SIZE]) |
1123 | { | |
55f78c43 | 1124 | struct drm_device *dev = intel_encoder->enc.dev; |
a4fc5ed6 | 1125 | struct drm_i915_private *dev_priv = dev->dev_private; |
21d40d37 | 1126 | struct intel_dp_priv *dp_priv = intel_encoder->dev_priv; |
a4fc5ed6 KP |
1127 | uint8_t train_set[4]; |
1128 | uint8_t link_status[DP_LINK_STATUS_SIZE]; | |
1129 | int i; | |
1130 | uint8_t voltage; | |
1131 | bool clock_recovery = false; | |
1132 | bool channel_eq = false; | |
1133 | bool first = true; | |
1134 | int tries; | |
e3421a18 | 1135 | u32 reg; |
a4fc5ed6 KP |
1136 | |
1137 | /* Write the link configuration data */ | |
ab00a9ef | 1138 | intel_dp_aux_native_write(intel_encoder, DP_LINK_BW_SET, |
a4fc5ed6 KP |
1139 | link_configuration, DP_LINK_CONFIGURATION_SIZE); |
1140 | ||
1141 | DP |= DP_PORT_EN; | |
e3421a18 ZW |
1142 | if (HAS_PCH_CPT(dev) && !IS_eDP(intel_encoder)) |
1143 | DP &= ~DP_LINK_TRAIN_MASK_CPT; | |
1144 | else | |
1145 | DP &= ~DP_LINK_TRAIN_MASK; | |
a4fc5ed6 KP |
1146 | memset(train_set, 0, 4); |
1147 | voltage = 0xff; | |
1148 | tries = 0; | |
1149 | clock_recovery = false; | |
1150 | for (;;) { | |
1151 | /* Use train_set[0] to set the voltage and pre emphasis values */ | |
e3421a18 ZW |
1152 | uint32_t signal_levels; |
1153 | if (IS_GEN6(dev) && IS_eDP(intel_encoder)) { | |
1154 | signal_levels = intel_gen6_edp_signal_levels(train_set[0]); | |
1155 | DP = (DP & ~EDP_LINK_TRAIN_VOL_EMP_MASK_SNB) | signal_levels; | |
1156 | } else { | |
1157 | signal_levels = intel_dp_signal_levels(train_set[0], dp_priv->lane_count); | |
1158 | DP = (DP & ~(DP_VOLTAGE_MASK|DP_PRE_EMPHASIS_MASK)) | signal_levels; | |
1159 | } | |
a4fc5ed6 | 1160 | |
e3421a18 ZW |
1161 | if (HAS_PCH_CPT(dev) && !IS_eDP(intel_encoder)) |
1162 | reg = DP | DP_LINK_TRAIN_PAT_1_CPT; | |
1163 | else | |
1164 | reg = DP | DP_LINK_TRAIN_PAT_1; | |
1165 | ||
1166 | if (!intel_dp_set_link_train(intel_encoder, reg, | |
a4fc5ed6 KP |
1167 | DP_TRAINING_PATTERN_1, train_set, first)) |
1168 | break; | |
1169 | first = false; | |
1170 | /* Set training pattern 1 */ | |
1171 | ||
1172 | udelay(100); | |
21d40d37 | 1173 | if (!intel_dp_get_link_status(intel_encoder, link_status)) |
a4fc5ed6 KP |
1174 | break; |
1175 | ||
1176 | if (intel_clock_recovery_ok(link_status, dp_priv->lane_count)) { | |
1177 | clock_recovery = true; | |
1178 | break; | |
1179 | } | |
1180 | ||
1181 | /* Check to see if we've tried the max voltage */ | |
1182 | for (i = 0; i < dp_priv->lane_count; i++) | |
1183 | if ((train_set[i] & DP_TRAIN_MAX_SWING_REACHED) == 0) | |
1184 | break; | |
1185 | if (i == dp_priv->lane_count) | |
1186 | break; | |
1187 | ||
1188 | /* Check to see if we've tried the same voltage 5 times */ | |
1189 | if ((train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK) == voltage) { | |
1190 | ++tries; | |
1191 | if (tries == 5) | |
1192 | break; | |
1193 | } else | |
1194 | tries = 0; | |
1195 | voltage = train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK; | |
1196 | ||
1197 | /* Compute new train_set as requested by target */ | |
21d40d37 | 1198 | intel_get_adjust_train(intel_encoder, link_status, dp_priv->lane_count, train_set); |
a4fc5ed6 KP |
1199 | } |
1200 | ||
1201 | /* channel equalization */ | |
1202 | tries = 0; | |
1203 | channel_eq = false; | |
1204 | for (;;) { | |
1205 | /* Use train_set[0] to set the voltage and pre emphasis values */ | |
e3421a18 ZW |
1206 | uint32_t signal_levels; |
1207 | ||
1208 | if (IS_GEN6(dev) && IS_eDP(intel_encoder)) { | |
1209 | signal_levels = intel_gen6_edp_signal_levels(train_set[0]); | |
1210 | DP = (DP & ~EDP_LINK_TRAIN_VOL_EMP_MASK_SNB) | signal_levels; | |
1211 | } else { | |
1212 | signal_levels = intel_dp_signal_levels(train_set[0], dp_priv->lane_count); | |
1213 | DP = (DP & ~(DP_VOLTAGE_MASK|DP_PRE_EMPHASIS_MASK)) | signal_levels; | |
1214 | } | |
1215 | ||
1216 | if (HAS_PCH_CPT(dev) && !IS_eDP(intel_encoder)) | |
1217 | reg = DP | DP_LINK_TRAIN_PAT_2_CPT; | |
1218 | else | |
1219 | reg = DP | DP_LINK_TRAIN_PAT_2; | |
a4fc5ed6 KP |
1220 | |
1221 | /* channel eq pattern */ | |
e3421a18 | 1222 | if (!intel_dp_set_link_train(intel_encoder, reg, |
a4fc5ed6 KP |
1223 | DP_TRAINING_PATTERN_2, train_set, |
1224 | false)) | |
1225 | break; | |
1226 | ||
1227 | udelay(400); | |
21d40d37 | 1228 | if (!intel_dp_get_link_status(intel_encoder, link_status)) |
a4fc5ed6 KP |
1229 | break; |
1230 | ||
1231 | if (intel_channel_eq_ok(link_status, dp_priv->lane_count)) { | |
1232 | channel_eq = true; | |
1233 | break; | |
1234 | } | |
1235 | ||
1236 | /* Try 5 times */ | |
1237 | if (tries > 5) | |
1238 | break; | |
1239 | ||
1240 | /* Compute new train_set as requested by target */ | |
21d40d37 | 1241 | intel_get_adjust_train(intel_encoder, link_status, dp_priv->lane_count, train_set); |
a4fc5ed6 KP |
1242 | ++tries; |
1243 | } | |
1244 | ||
e3421a18 ZW |
1245 | if (HAS_PCH_CPT(dev) && !IS_eDP(intel_encoder)) |
1246 | reg = DP | DP_LINK_TRAIN_OFF_CPT; | |
1247 | else | |
1248 | reg = DP | DP_LINK_TRAIN_OFF; | |
1249 | ||
1250 | I915_WRITE(dp_priv->output_reg, reg); | |
a4fc5ed6 | 1251 | POSTING_READ(dp_priv->output_reg); |
21d40d37 | 1252 | intel_dp_aux_native_write_1(intel_encoder, |
a4fc5ed6 KP |
1253 | DP_TRAINING_PATTERN_SET, DP_TRAINING_PATTERN_DISABLE); |
1254 | } | |
1255 | ||
1256 | static void | |
21d40d37 | 1257 | intel_dp_link_down(struct intel_encoder *intel_encoder, uint32_t DP) |
a4fc5ed6 | 1258 | { |
55f78c43 | 1259 | struct drm_device *dev = intel_encoder->enc.dev; |
a4fc5ed6 | 1260 | struct drm_i915_private *dev_priv = dev->dev_private; |
21d40d37 | 1261 | struct intel_dp_priv *dp_priv = intel_encoder->dev_priv; |
a4fc5ed6 | 1262 | |
28c97730 | 1263 | DRM_DEBUG_KMS("\n"); |
32f9d658 | 1264 | |
21d40d37 | 1265 | if (IS_eDP(intel_encoder)) { |
32f9d658 ZW |
1266 | DP &= ~DP_PLL_ENABLE; |
1267 | I915_WRITE(dp_priv->output_reg, DP); | |
1268 | POSTING_READ(dp_priv->output_reg); | |
1269 | udelay(100); | |
1270 | } | |
1271 | ||
e3421a18 ZW |
1272 | if (HAS_PCH_CPT(dev) && !IS_eDP(intel_encoder)) { |
1273 | DP &= ~DP_LINK_TRAIN_MASK_CPT; | |
1274 | I915_WRITE(dp_priv->output_reg, DP | DP_LINK_TRAIN_PAT_IDLE_CPT); | |
1275 | POSTING_READ(dp_priv->output_reg); | |
1276 | } else { | |
1277 | DP &= ~DP_LINK_TRAIN_MASK; | |
1278 | I915_WRITE(dp_priv->output_reg, DP | DP_LINK_TRAIN_PAT_IDLE); | |
1279 | POSTING_READ(dp_priv->output_reg); | |
1280 | } | |
5eb08b69 ZW |
1281 | |
1282 | udelay(17000); | |
1283 | ||
21d40d37 | 1284 | if (IS_eDP(intel_encoder)) |
32f9d658 | 1285 | DP |= DP_LINK_TRAIN_OFF; |
a4fc5ed6 KP |
1286 | I915_WRITE(dp_priv->output_reg, DP & ~DP_PORT_EN); |
1287 | POSTING_READ(dp_priv->output_reg); | |
1288 | } | |
1289 | ||
a4fc5ed6 KP |
1290 | /* |
1291 | * According to DP spec | |
1292 | * 5.1.2: | |
1293 | * 1. Read DPCD | |
1294 | * 2. Configure link according to Receiver Capabilities | |
1295 | * 3. Use Link Training from 2.5.3.3 and 3.5.1.3 | |
1296 | * 4. Check link status on receipt of hot-plug interrupt | |
1297 | */ | |
1298 | ||
1299 | static void | |
21d40d37 | 1300 | intel_dp_check_link_status(struct intel_encoder *intel_encoder) |
a4fc5ed6 | 1301 | { |
21d40d37 | 1302 | struct intel_dp_priv *dp_priv = intel_encoder->dev_priv; |
a4fc5ed6 KP |
1303 | uint8_t link_status[DP_LINK_STATUS_SIZE]; |
1304 | ||
21d40d37 | 1305 | if (!intel_encoder->enc.crtc) |
a4fc5ed6 KP |
1306 | return; |
1307 | ||
21d40d37 EA |
1308 | if (!intel_dp_get_link_status(intel_encoder, link_status)) { |
1309 | intel_dp_link_down(intel_encoder, dp_priv->DP); | |
a4fc5ed6 KP |
1310 | return; |
1311 | } | |
1312 | ||
1313 | if (!intel_channel_eq_ok(link_status, dp_priv->lane_count)) | |
21d40d37 | 1314 | intel_dp_link_train(intel_encoder, dp_priv->DP, dp_priv->link_configuration); |
a4fc5ed6 | 1315 | } |
a4fc5ed6 | 1316 | |
5eb08b69 | 1317 | static enum drm_connector_status |
f2b115e6 | 1318 | ironlake_dp_detect(struct drm_connector *connector) |
5eb08b69 | 1319 | { |
55f78c43 ZW |
1320 | struct drm_encoder *encoder = intel_attached_encoder(connector); |
1321 | struct intel_encoder *intel_encoder = enc_to_intel_encoder(encoder); | |
21d40d37 | 1322 | struct intel_dp_priv *dp_priv = intel_encoder->dev_priv; |
5eb08b69 ZW |
1323 | enum drm_connector_status status; |
1324 | ||
1325 | status = connector_status_disconnected; | |
21d40d37 | 1326 | if (intel_dp_aux_native_read(intel_encoder, |
5eb08b69 ZW |
1327 | 0x000, dp_priv->dpcd, |
1328 | sizeof (dp_priv->dpcd)) == sizeof (dp_priv->dpcd)) | |
1329 | { | |
1330 | if (dp_priv->dpcd[0] != 0) | |
1331 | status = connector_status_connected; | |
1332 | } | |
a7de64e5 AJ |
1333 | DRM_DEBUG_KMS("DPCD: %hx%hx%hx%hx\n", dp_priv->dpcd[0], |
1334 | dp_priv->dpcd[1], dp_priv->dpcd[2], dp_priv->dpcd[3]); | |
5eb08b69 ZW |
1335 | return status; |
1336 | } | |
1337 | ||
a4fc5ed6 KP |
1338 | /** |
1339 | * Uses CRT_HOTPLUG_EN and CRT_HOTPLUG_STAT to detect DP connection. | |
1340 | * | |
1341 | * \return true if DP port is connected. | |
1342 | * \return false if DP port is disconnected. | |
1343 | */ | |
1344 | static enum drm_connector_status | |
1345 | intel_dp_detect(struct drm_connector *connector) | |
1346 | { | |
55f78c43 ZW |
1347 | struct drm_encoder *encoder = intel_attached_encoder(connector); |
1348 | struct intel_encoder *intel_encoder = enc_to_intel_encoder(encoder); | |
1349 | struct drm_device *dev = intel_encoder->enc.dev; | |
a4fc5ed6 | 1350 | struct drm_i915_private *dev_priv = dev->dev_private; |
21d40d37 | 1351 | struct intel_dp_priv *dp_priv = intel_encoder->dev_priv; |
a4fc5ed6 KP |
1352 | uint32_t temp, bit; |
1353 | enum drm_connector_status status; | |
1354 | ||
1355 | dp_priv->has_audio = false; | |
1356 | ||
c619eed4 | 1357 | if (HAS_PCH_SPLIT(dev)) |
f2b115e6 | 1358 | return ironlake_dp_detect(connector); |
5eb08b69 | 1359 | |
a4fc5ed6 KP |
1360 | switch (dp_priv->output_reg) { |
1361 | case DP_B: | |
1362 | bit = DPB_HOTPLUG_INT_STATUS; | |
1363 | break; | |
1364 | case DP_C: | |
1365 | bit = DPC_HOTPLUG_INT_STATUS; | |
1366 | break; | |
1367 | case DP_D: | |
1368 | bit = DPD_HOTPLUG_INT_STATUS; | |
1369 | break; | |
1370 | default: | |
1371 | return connector_status_unknown; | |
1372 | } | |
1373 | ||
1374 | temp = I915_READ(PORT_HOTPLUG_STAT); | |
1375 | ||
1376 | if ((temp & bit) == 0) | |
1377 | return connector_status_disconnected; | |
1378 | ||
1379 | status = connector_status_disconnected; | |
21d40d37 | 1380 | if (intel_dp_aux_native_read(intel_encoder, |
a4fc5ed6 KP |
1381 | 0x000, dp_priv->dpcd, |
1382 | sizeof (dp_priv->dpcd)) == sizeof (dp_priv->dpcd)) | |
1383 | { | |
1384 | if (dp_priv->dpcd[0] != 0) | |
1385 | status = connector_status_connected; | |
1386 | } | |
1387 | return status; | |
1388 | } | |
1389 | ||
1390 | static int intel_dp_get_modes(struct drm_connector *connector) | |
1391 | { | |
55f78c43 ZW |
1392 | struct drm_encoder *encoder = intel_attached_encoder(connector); |
1393 | struct intel_encoder *intel_encoder = enc_to_intel_encoder(encoder); | |
1394 | struct drm_device *dev = intel_encoder->enc.dev; | |
32f9d658 | 1395 | struct drm_i915_private *dev_priv = dev->dev_private; |
36e83a18 | 1396 | struct intel_dp_priv *dp_priv = intel_encoder->dev_priv; |
32f9d658 | 1397 | int ret; |
a4fc5ed6 KP |
1398 | |
1399 | /* We should parse the EDID data and find out if it has an audio sink | |
1400 | */ | |
1401 | ||
335af9a2 | 1402 | ret = intel_ddc_get_modes(connector, intel_encoder->ddc_bus); |
b9efc480 ZY |
1403 | if (ret) { |
1404 | if ((IS_eDP(intel_encoder) || IS_PCH_eDP(dp_priv)) && | |
1405 | !dev_priv->panel_fixed_mode) { | |
1406 | struct drm_display_mode *newmode; | |
1407 | list_for_each_entry(newmode, &connector->probed_modes, | |
1408 | head) { | |
1409 | if (newmode->type & DRM_MODE_TYPE_PREFERRED) { | |
1410 | dev_priv->panel_fixed_mode = | |
1411 | drm_mode_duplicate(dev, newmode); | |
1412 | break; | |
1413 | } | |
1414 | } | |
1415 | } | |
1416 | ||
32f9d658 | 1417 | return ret; |
b9efc480 | 1418 | } |
32f9d658 ZW |
1419 | |
1420 | /* if eDP has no EDID, try to use fixed panel mode from VBT */ | |
36e83a18 | 1421 | if (IS_eDP(intel_encoder) || IS_PCH_eDP(dp_priv)) { |
32f9d658 ZW |
1422 | if (dev_priv->panel_fixed_mode != NULL) { |
1423 | struct drm_display_mode *mode; | |
1424 | mode = drm_mode_duplicate(dev, dev_priv->panel_fixed_mode); | |
1425 | drm_mode_probed_add(connector, mode); | |
1426 | return 1; | |
1427 | } | |
1428 | } | |
1429 | return 0; | |
a4fc5ed6 KP |
1430 | } |
1431 | ||
1432 | static void | |
1433 | intel_dp_destroy (struct drm_connector *connector) | |
1434 | { | |
a4fc5ed6 KP |
1435 | drm_sysfs_connector_remove(connector); |
1436 | drm_connector_cleanup(connector); | |
55f78c43 | 1437 | kfree(connector); |
a4fc5ed6 KP |
1438 | } |
1439 | ||
1440 | static const struct drm_encoder_helper_funcs intel_dp_helper_funcs = { | |
1441 | .dpms = intel_dp_dpms, | |
1442 | .mode_fixup = intel_dp_mode_fixup, | |
1443 | .prepare = intel_encoder_prepare, | |
1444 | .mode_set = intel_dp_mode_set, | |
1445 | .commit = intel_encoder_commit, | |
1446 | }; | |
1447 | ||
1448 | static const struct drm_connector_funcs intel_dp_connector_funcs = { | |
1449 | .dpms = drm_helper_connector_dpms, | |
a4fc5ed6 KP |
1450 | .detect = intel_dp_detect, |
1451 | .fill_modes = drm_helper_probe_single_connector_modes, | |
1452 | .destroy = intel_dp_destroy, | |
1453 | }; | |
1454 | ||
1455 | static const struct drm_connector_helper_funcs intel_dp_connector_helper_funcs = { | |
1456 | .get_modes = intel_dp_get_modes, | |
1457 | .mode_valid = intel_dp_mode_valid, | |
55f78c43 | 1458 | .best_encoder = intel_attached_encoder, |
a4fc5ed6 KP |
1459 | }; |
1460 | ||
1461 | static void intel_dp_enc_destroy(struct drm_encoder *encoder) | |
1462 | { | |
55f78c43 ZW |
1463 | struct intel_encoder *intel_encoder = enc_to_intel_encoder(encoder); |
1464 | ||
1465 | if (intel_encoder->i2c_bus) | |
1466 | intel_i2c_destroy(intel_encoder->i2c_bus); | |
a4fc5ed6 | 1467 | drm_encoder_cleanup(encoder); |
55f78c43 | 1468 | kfree(intel_encoder); |
a4fc5ed6 KP |
1469 | } |
1470 | ||
1471 | static const struct drm_encoder_funcs intel_dp_enc_funcs = { | |
1472 | .destroy = intel_dp_enc_destroy, | |
1473 | }; | |
1474 | ||
c8110e52 | 1475 | void |
21d40d37 | 1476 | intel_dp_hot_plug(struct intel_encoder *intel_encoder) |
c8110e52 | 1477 | { |
21d40d37 | 1478 | struct intel_dp_priv *dp_priv = intel_encoder->dev_priv; |
c8110e52 KP |
1479 | |
1480 | if (dp_priv->dpms_mode == DRM_MODE_DPMS_ON) | |
21d40d37 | 1481 | intel_dp_check_link_status(intel_encoder); |
c8110e52 | 1482 | } |
6207937d | 1483 | |
e3421a18 ZW |
1484 | /* Return which DP Port should be selected for Transcoder DP control */ |
1485 | int | |
1486 | intel_trans_dp_port_sel (struct drm_crtc *crtc) | |
1487 | { | |
1488 | struct drm_device *dev = crtc->dev; | |
1489 | struct drm_mode_config *mode_config = &dev->mode_config; | |
1490 | struct drm_encoder *encoder; | |
1491 | struct intel_encoder *intel_encoder = NULL; | |
1492 | ||
1493 | list_for_each_entry(encoder, &mode_config->encoder_list, head) { | |
d8201ab6 | 1494 | if (encoder->crtc != crtc) |
e3421a18 ZW |
1495 | continue; |
1496 | ||
1497 | intel_encoder = enc_to_intel_encoder(encoder); | |
1498 | if (intel_encoder->type == INTEL_OUTPUT_DISPLAYPORT) { | |
1499 | struct intel_dp_priv *dp_priv = intel_encoder->dev_priv; | |
1500 | return dp_priv->output_reg; | |
1501 | } | |
1502 | } | |
1503 | return -1; | |
1504 | } | |
1505 | ||
36e83a18 | 1506 | /* check the VBT to see whether the eDP is on DP-D port */ |
cb0953d7 | 1507 | bool intel_dpd_is_edp(struct drm_device *dev) |
36e83a18 ZY |
1508 | { |
1509 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1510 | struct child_device_config *p_child; | |
1511 | int i; | |
1512 | ||
1513 | if (!dev_priv->child_dev_num) | |
1514 | return false; | |
1515 | ||
1516 | for (i = 0; i < dev_priv->child_dev_num; i++) { | |
1517 | p_child = dev_priv->child_dev + i; | |
1518 | ||
1519 | if (p_child->dvo_port == PORT_IDPD && | |
1520 | p_child->device_type == DEVICE_TYPE_eDP) | |
1521 | return true; | |
1522 | } | |
1523 | return false; | |
1524 | } | |
1525 | ||
a4fc5ed6 KP |
1526 | void |
1527 | intel_dp_init(struct drm_device *dev, int output_reg) | |
1528 | { | |
1529 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1530 | struct drm_connector *connector; | |
21d40d37 | 1531 | struct intel_encoder *intel_encoder; |
55f78c43 | 1532 | struct intel_connector *intel_connector; |
a4fc5ed6 | 1533 | struct intel_dp_priv *dp_priv; |
5eb08b69 | 1534 | const char *name = NULL; |
b329530c | 1535 | int type; |
a4fc5ed6 | 1536 | |
21d40d37 | 1537 | intel_encoder = kcalloc(sizeof(struct intel_encoder) + |
a4fc5ed6 | 1538 | sizeof(struct intel_dp_priv), 1, GFP_KERNEL); |
21d40d37 | 1539 | if (!intel_encoder) |
a4fc5ed6 KP |
1540 | return; |
1541 | ||
55f78c43 ZW |
1542 | intel_connector = kzalloc(sizeof(struct intel_connector), GFP_KERNEL); |
1543 | if (!intel_connector) { | |
1544 | kfree(intel_encoder); | |
1545 | return; | |
1546 | } | |
1547 | ||
21d40d37 | 1548 | dp_priv = (struct intel_dp_priv *)(intel_encoder + 1); |
a4fc5ed6 | 1549 | |
b329530c AJ |
1550 | if (HAS_PCH_SPLIT(dev) && (output_reg == PCH_DP_D)) |
1551 | if (intel_dpd_is_edp(dev)) | |
1552 | dp_priv->is_pch_edp = true; | |
1553 | ||
1554 | if (output_reg == DP_A || IS_PCH_eDP(dp_priv)) { | |
1555 | type = DRM_MODE_CONNECTOR_eDP; | |
1556 | intel_encoder->type = INTEL_OUTPUT_EDP; | |
1557 | } else { | |
1558 | type = DRM_MODE_CONNECTOR_DisplayPort; | |
1559 | intel_encoder->type = INTEL_OUTPUT_DISPLAYPORT; | |
1560 | } | |
1561 | ||
55f78c43 | 1562 | connector = &intel_connector->base; |
b329530c | 1563 | drm_connector_init(dev, connector, &intel_dp_connector_funcs, type); |
a4fc5ed6 KP |
1564 | drm_connector_helper_add(connector, &intel_dp_connector_helper_funcs); |
1565 | ||
eb1f8e4f DA |
1566 | connector->polled = DRM_CONNECTOR_POLL_HPD; |
1567 | ||
652af9d7 | 1568 | if (output_reg == DP_B || output_reg == PCH_DP_B) |
21d40d37 | 1569 | intel_encoder->clone_mask = (1 << INTEL_DP_B_CLONE_BIT); |
652af9d7 | 1570 | else if (output_reg == DP_C || output_reg == PCH_DP_C) |
21d40d37 | 1571 | intel_encoder->clone_mask = (1 << INTEL_DP_C_CLONE_BIT); |
652af9d7 | 1572 | else if (output_reg == DP_D || output_reg == PCH_DP_D) |
21d40d37 | 1573 | intel_encoder->clone_mask = (1 << INTEL_DP_D_CLONE_BIT); |
f8aed700 | 1574 | |
21d40d37 EA |
1575 | if (IS_eDP(intel_encoder)) |
1576 | intel_encoder->clone_mask = (1 << INTEL_EDP_CLONE_BIT); | |
6251ec0a | 1577 | |
21d40d37 | 1578 | intel_encoder->crtc_mask = (1 << 0) | (1 << 1); |
a4fc5ed6 KP |
1579 | connector->interlace_allowed = true; |
1580 | connector->doublescan_allowed = 0; | |
1581 | ||
21d40d37 | 1582 | dp_priv->intel_encoder = intel_encoder; |
a4fc5ed6 KP |
1583 | dp_priv->output_reg = output_reg; |
1584 | dp_priv->has_audio = false; | |
c8110e52 | 1585 | dp_priv->dpms_mode = DRM_MODE_DPMS_ON; |
21d40d37 | 1586 | intel_encoder->dev_priv = dp_priv; |
a4fc5ed6 | 1587 | |
21d40d37 | 1588 | drm_encoder_init(dev, &intel_encoder->enc, &intel_dp_enc_funcs, |
a4fc5ed6 | 1589 | DRM_MODE_ENCODER_TMDS); |
21d40d37 | 1590 | drm_encoder_helper_add(&intel_encoder->enc, &intel_dp_helper_funcs); |
a4fc5ed6 | 1591 | |
55f78c43 | 1592 | drm_mode_connector_attach_encoder(&intel_connector->base, |
21d40d37 | 1593 | &intel_encoder->enc); |
a4fc5ed6 KP |
1594 | drm_sysfs_connector_add(connector); |
1595 | ||
1596 | /* Set up the DDC bus. */ | |
5eb08b69 | 1597 | switch (output_reg) { |
32f9d658 ZW |
1598 | case DP_A: |
1599 | name = "DPDDC-A"; | |
1600 | break; | |
5eb08b69 ZW |
1601 | case DP_B: |
1602 | case PCH_DP_B: | |
b01f2c3a JB |
1603 | dev_priv->hotplug_supported_mask |= |
1604 | HDMIB_HOTPLUG_INT_STATUS; | |
5eb08b69 ZW |
1605 | name = "DPDDC-B"; |
1606 | break; | |
1607 | case DP_C: | |
1608 | case PCH_DP_C: | |
b01f2c3a JB |
1609 | dev_priv->hotplug_supported_mask |= |
1610 | HDMIC_HOTPLUG_INT_STATUS; | |
5eb08b69 ZW |
1611 | name = "DPDDC-C"; |
1612 | break; | |
1613 | case DP_D: | |
1614 | case PCH_DP_D: | |
b01f2c3a JB |
1615 | dev_priv->hotplug_supported_mask |= |
1616 | HDMID_HOTPLUG_INT_STATUS; | |
5eb08b69 ZW |
1617 | name = "DPDDC-D"; |
1618 | break; | |
1619 | } | |
1620 | ||
55f78c43 | 1621 | intel_dp_i2c_init(intel_encoder, intel_connector, name); |
32f9d658 | 1622 | |
21d40d37 EA |
1623 | intel_encoder->ddc_bus = &dp_priv->adapter; |
1624 | intel_encoder->hot_plug = intel_dp_hot_plug; | |
a4fc5ed6 | 1625 | |
36e83a18 | 1626 | if (output_reg == DP_A || IS_PCH_eDP(dp_priv)) { |
32f9d658 ZW |
1627 | /* initialize panel mode from VBT if available for eDP */ |
1628 | if (dev_priv->lfp_lvds_vbt_mode) { | |
1629 | dev_priv->panel_fixed_mode = | |
1630 | drm_mode_duplicate(dev, dev_priv->lfp_lvds_vbt_mode); | |
1631 | if (dev_priv->panel_fixed_mode) { | |
1632 | dev_priv->panel_fixed_mode->type |= | |
1633 | DRM_MODE_TYPE_PREFERRED; | |
1634 | } | |
1635 | } | |
1636 | } | |
1637 | ||
a4fc5ed6 KP |
1638 | /* For G4X desktop chip, PEG_BAND_GAP_DATA 3:0 must first be written |
1639 | * 0xd. Failure to do so will result in spurious interrupts being | |
1640 | * generated on the port when a cable is not attached. | |
1641 | */ | |
1642 | if (IS_G4X(dev) && !IS_GM45(dev)) { | |
1643 | u32 temp = I915_READ(PEG_BAND_GAP_DATA); | |
1644 | I915_WRITE(PEG_BAND_GAP_DATA, (temp & ~0xf) | 0xd); | |
1645 | } | |
1646 | } |