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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> | |
29 | #include "drmP.h" | |
30 | #include "drm.h" | |
31 | #include "drm_crtc.h" | |
32 | #include "drm_crtc_helper.h" | |
33 | #include "intel_drv.h" | |
34 | #include "i915_drm.h" | |
35 | #include "i915_drv.h" | |
36 | #include "intel_dp.h" | |
37 | ||
38 | #define DP_LINK_STATUS_SIZE 6 | |
39 | #define DP_LINK_CHECK_TIMEOUT (10 * 1000) | |
40 | ||
41 | #define DP_LINK_CONFIGURATION_SIZE 9 | |
42 | ||
43 | struct intel_dp_priv { | |
44 | uint32_t output_reg; | |
45 | uint32_t DP; | |
46 | uint8_t link_configuration[DP_LINK_CONFIGURATION_SIZE]; | |
47 | uint32_t save_DP; | |
48 | uint8_t save_link_configuration[DP_LINK_CONFIGURATION_SIZE]; | |
49 | bool has_audio; | |
c8110e52 | 50 | int dpms_mode; |
a4fc5ed6 KP |
51 | uint8_t link_bw; |
52 | uint8_t lane_count; | |
53 | uint8_t dpcd[4]; | |
54 | struct intel_output *intel_output; | |
55 | struct i2c_adapter adapter; | |
56 | struct i2c_algo_dp_aux_data algo; | |
57 | }; | |
58 | ||
59 | static void | |
60 | intel_dp_link_train(struct intel_output *intel_output, uint32_t DP, | |
61 | uint8_t link_configuration[DP_LINK_CONFIGURATION_SIZE]); | |
62 | ||
63 | static void | |
64 | intel_dp_link_down(struct intel_output *intel_output, uint32_t DP); | |
65 | ||
66 | static int | |
67 | intel_dp_max_lane_count(struct intel_output *intel_output) | |
68 | { | |
69 | struct intel_dp_priv *dp_priv = intel_output->dev_priv; | |
70 | int max_lane_count = 4; | |
71 | ||
72 | if (dp_priv->dpcd[0] >= 0x11) { | |
73 | max_lane_count = dp_priv->dpcd[2] & 0x1f; | |
74 | switch (max_lane_count) { | |
75 | case 1: case 2: case 4: | |
76 | break; | |
77 | default: | |
78 | max_lane_count = 4; | |
79 | } | |
80 | } | |
81 | return max_lane_count; | |
82 | } | |
83 | ||
84 | static int | |
85 | intel_dp_max_link_bw(struct intel_output *intel_output) | |
86 | { | |
87 | struct intel_dp_priv *dp_priv = intel_output->dev_priv; | |
88 | int max_link_bw = dp_priv->dpcd[1]; | |
89 | ||
90 | switch (max_link_bw) { | |
91 | case DP_LINK_BW_1_62: | |
92 | case DP_LINK_BW_2_7: | |
93 | break; | |
94 | default: | |
95 | max_link_bw = DP_LINK_BW_1_62; | |
96 | break; | |
97 | } | |
98 | return max_link_bw; | |
99 | } | |
100 | ||
101 | static int | |
102 | intel_dp_link_clock(uint8_t link_bw) | |
103 | { | |
104 | if (link_bw == DP_LINK_BW_2_7) | |
105 | return 270000; | |
106 | else | |
107 | return 162000; | |
108 | } | |
109 | ||
110 | /* I think this is a fiction */ | |
111 | static int | |
112 | intel_dp_link_required(int pixel_clock) | |
113 | { | |
114 | return pixel_clock * 3; | |
115 | } | |
116 | ||
117 | static int | |
118 | intel_dp_mode_valid(struct drm_connector *connector, | |
119 | struct drm_display_mode *mode) | |
120 | { | |
121 | struct intel_output *intel_output = to_intel_output(connector); | |
122 | int max_link_clock = intel_dp_link_clock(intel_dp_max_link_bw(intel_output)); | |
123 | int max_lanes = intel_dp_max_lane_count(intel_output); | |
124 | ||
125 | if (intel_dp_link_required(mode->clock) > max_link_clock * max_lanes) | |
126 | return MODE_CLOCK_HIGH; | |
127 | ||
128 | if (mode->clock < 10000) | |
129 | return MODE_CLOCK_LOW; | |
130 | ||
131 | return MODE_OK; | |
132 | } | |
133 | ||
134 | static uint32_t | |
135 | pack_aux(uint8_t *src, int src_bytes) | |
136 | { | |
137 | int i; | |
138 | uint32_t v = 0; | |
139 | ||
140 | if (src_bytes > 4) | |
141 | src_bytes = 4; | |
142 | for (i = 0; i < src_bytes; i++) | |
143 | v |= ((uint32_t) src[i]) << ((3-i) * 8); | |
144 | return v; | |
145 | } | |
146 | ||
147 | static void | |
148 | unpack_aux(uint32_t src, uint8_t *dst, int dst_bytes) | |
149 | { | |
150 | int i; | |
151 | if (dst_bytes > 4) | |
152 | dst_bytes = 4; | |
153 | for (i = 0; i < dst_bytes; i++) | |
154 | dst[i] = src >> ((3-i) * 8); | |
155 | } | |
156 | ||
fb0f8fbf KP |
157 | /* hrawclock is 1/4 the FSB frequency */ |
158 | static int | |
159 | intel_hrawclk(struct drm_device *dev) | |
160 | { | |
161 | struct drm_i915_private *dev_priv = dev->dev_private; | |
162 | uint32_t clkcfg; | |
163 | ||
164 | clkcfg = I915_READ(CLKCFG); | |
165 | switch (clkcfg & CLKCFG_FSB_MASK) { | |
166 | case CLKCFG_FSB_400: | |
167 | return 100; | |
168 | case CLKCFG_FSB_533: | |
169 | return 133; | |
170 | case CLKCFG_FSB_667: | |
171 | return 166; | |
172 | case CLKCFG_FSB_800: | |
173 | return 200; | |
174 | case CLKCFG_FSB_1067: | |
175 | return 266; | |
176 | case CLKCFG_FSB_1333: | |
177 | return 333; | |
178 | /* these two are just a guess; one of them might be right */ | |
179 | case CLKCFG_FSB_1600: | |
180 | case CLKCFG_FSB_1600_ALT: | |
181 | return 400; | |
182 | default: | |
183 | return 133; | |
184 | } | |
185 | } | |
186 | ||
a4fc5ed6 KP |
187 | static int |
188 | intel_dp_aux_ch(struct intel_output *intel_output, | |
189 | uint8_t *send, int send_bytes, | |
190 | uint8_t *recv, int recv_size) | |
191 | { | |
192 | struct intel_dp_priv *dp_priv = intel_output->dev_priv; | |
193 | uint32_t output_reg = dp_priv->output_reg; | |
194 | struct drm_device *dev = intel_output->base.dev; | |
195 | struct drm_i915_private *dev_priv = dev->dev_private; | |
196 | uint32_t ch_ctl = output_reg + 0x10; | |
197 | uint32_t ch_data = ch_ctl + 4; | |
198 | int i; | |
199 | int recv_bytes; | |
200 | uint32_t ctl; | |
201 | uint32_t status; | |
fb0f8fbf KP |
202 | uint32_t aux_clock_divider; |
203 | int try; | |
a4fc5ed6 KP |
204 | |
205 | /* The clock divider is based off the hrawclk, | |
fb0f8fbf KP |
206 | * and would like to run at 2MHz. So, take the |
207 | * hrawclk value and divide by 2 and use that | |
a4fc5ed6 | 208 | */ |
fb0f8fbf KP |
209 | aux_clock_divider = intel_hrawclk(dev) / 2; |
210 | /* Must try at least 3 times according to DP spec */ | |
211 | for (try = 0; try < 5; try++) { | |
212 | /* Load the send data into the aux channel data registers */ | |
213 | for (i = 0; i < send_bytes; i += 4) { | |
214 | uint32_t d = pack_aux(send + i, send_bytes - i);; | |
215 | ||
216 | I915_WRITE(ch_data + i, d); | |
217 | } | |
218 | ||
219 | ctl = (DP_AUX_CH_CTL_SEND_BUSY | | |
220 | DP_AUX_CH_CTL_TIME_OUT_400us | | |
221 | (send_bytes << DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT) | | |
222 | (5 << DP_AUX_CH_CTL_PRECHARGE_2US_SHIFT) | | |
223 | (aux_clock_divider << DP_AUX_CH_CTL_BIT_CLOCK_2X_SHIFT) | | |
224 | DP_AUX_CH_CTL_DONE | | |
225 | DP_AUX_CH_CTL_TIME_OUT_ERROR | | |
226 | DP_AUX_CH_CTL_RECEIVE_ERROR); | |
227 | ||
228 | /* Send the command and wait for it to complete */ | |
229 | I915_WRITE(ch_ctl, ctl); | |
230 | (void) I915_READ(ch_ctl); | |
231 | for (;;) { | |
232 | udelay(100); | |
233 | status = I915_READ(ch_ctl); | |
234 | if ((status & DP_AUX_CH_CTL_SEND_BUSY) == 0) | |
235 | break; | |
236 | } | |
237 | ||
238 | /* Clear done status and any errors */ | |
eebc863e | 239 | I915_WRITE(ch_ctl, (status | |
fb0f8fbf KP |
240 | DP_AUX_CH_CTL_DONE | |
241 | DP_AUX_CH_CTL_TIME_OUT_ERROR | | |
242 | DP_AUX_CH_CTL_RECEIVE_ERROR)); | |
243 | (void) I915_READ(ch_ctl); | |
244 | if ((status & DP_AUX_CH_CTL_TIME_OUT_ERROR) == 0) | |
a4fc5ed6 KP |
245 | break; |
246 | } | |
247 | ||
a4fc5ed6 | 248 | if ((status & DP_AUX_CH_CTL_DONE) == 0) { |
1ae8c0a5 | 249 | DRM_ERROR("dp_aux_ch not done status 0x%08x\n", status); |
a5b3da54 | 250 | return -EBUSY; |
a4fc5ed6 KP |
251 | } |
252 | ||
253 | /* Check for timeout or receive error. | |
254 | * Timeouts occur when the sink is not connected | |
255 | */ | |
a5b3da54 | 256 | if (status & DP_AUX_CH_CTL_RECEIVE_ERROR) { |
1ae8c0a5 | 257 | DRM_ERROR("dp_aux_ch receive error status 0x%08x\n", status); |
a5b3da54 KP |
258 | return -EIO; |
259 | } | |
1ae8c0a5 KP |
260 | |
261 | /* Timeouts occur when the device isn't connected, so they're | |
262 | * "normal" -- don't fill the kernel log with these */ | |
a5b3da54 | 263 | if (status & DP_AUX_CH_CTL_TIME_OUT_ERROR) { |
1ae8c0a5 | 264 | DRM_DEBUG("dp_aux_ch timeout status 0x%08x\n", status); |
a5b3da54 | 265 | return -ETIMEDOUT; |
a4fc5ed6 KP |
266 | } |
267 | ||
268 | /* Unload any bytes sent back from the other side */ | |
269 | recv_bytes = ((status & DP_AUX_CH_CTL_MESSAGE_SIZE_MASK) >> | |
270 | DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT); | |
271 | ||
272 | if (recv_bytes > recv_size) | |
273 | recv_bytes = recv_size; | |
274 | ||
275 | for (i = 0; i < recv_bytes; i += 4) { | |
276 | uint32_t d = I915_READ(ch_data + i); | |
277 | ||
278 | unpack_aux(d, recv + i, recv_bytes - i); | |
279 | } | |
280 | ||
281 | return recv_bytes; | |
282 | } | |
283 | ||
284 | /* Write data to the aux channel in native mode */ | |
285 | static int | |
286 | intel_dp_aux_native_write(struct intel_output *intel_output, | |
287 | uint16_t address, uint8_t *send, int send_bytes) | |
288 | { | |
289 | int ret; | |
290 | uint8_t msg[20]; | |
291 | int msg_bytes; | |
292 | uint8_t ack; | |
293 | ||
294 | if (send_bytes > 16) | |
295 | return -1; | |
296 | msg[0] = AUX_NATIVE_WRITE << 4; | |
297 | msg[1] = address >> 8; | |
eebc863e | 298 | msg[2] = address & 0xff; |
a4fc5ed6 KP |
299 | msg[3] = send_bytes - 1; |
300 | memcpy(&msg[4], send, send_bytes); | |
301 | msg_bytes = send_bytes + 4; | |
302 | for (;;) { | |
303 | ret = intel_dp_aux_ch(intel_output, msg, msg_bytes, &ack, 1); | |
304 | if (ret < 0) | |
305 | return ret; | |
306 | if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_ACK) | |
307 | break; | |
308 | else if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_DEFER) | |
309 | udelay(100); | |
310 | else | |
a5b3da54 | 311 | return -EIO; |
a4fc5ed6 KP |
312 | } |
313 | return send_bytes; | |
314 | } | |
315 | ||
316 | /* Write a single byte to the aux channel in native mode */ | |
317 | static int | |
318 | intel_dp_aux_native_write_1(struct intel_output *intel_output, | |
319 | uint16_t address, uint8_t byte) | |
320 | { | |
321 | return intel_dp_aux_native_write(intel_output, address, &byte, 1); | |
322 | } | |
323 | ||
324 | /* read bytes from a native aux channel */ | |
325 | static int | |
326 | intel_dp_aux_native_read(struct intel_output *intel_output, | |
327 | uint16_t address, uint8_t *recv, int recv_bytes) | |
328 | { | |
329 | uint8_t msg[4]; | |
330 | int msg_bytes; | |
331 | uint8_t reply[20]; | |
332 | int reply_bytes; | |
333 | uint8_t ack; | |
334 | int ret; | |
335 | ||
336 | msg[0] = AUX_NATIVE_READ << 4; | |
337 | msg[1] = address >> 8; | |
338 | msg[2] = address & 0xff; | |
339 | msg[3] = recv_bytes - 1; | |
340 | ||
341 | msg_bytes = 4; | |
342 | reply_bytes = recv_bytes + 1; | |
343 | ||
344 | for (;;) { | |
345 | ret = intel_dp_aux_ch(intel_output, msg, msg_bytes, | |
346 | reply, reply_bytes); | |
a5b3da54 KP |
347 | if (ret == 0) |
348 | return -EPROTO; | |
349 | if (ret < 0) | |
a4fc5ed6 KP |
350 | return ret; |
351 | ack = reply[0]; | |
352 | if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_ACK) { | |
353 | memcpy(recv, reply + 1, ret - 1); | |
354 | return ret - 1; | |
355 | } | |
356 | else if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_DEFER) | |
357 | udelay(100); | |
358 | else | |
a5b3da54 | 359 | return -EIO; |
a4fc5ed6 KP |
360 | } |
361 | } | |
362 | ||
363 | static int | |
364 | intel_dp_i2c_aux_ch(struct i2c_adapter *adapter, | |
365 | uint8_t *send, int send_bytes, | |
366 | uint8_t *recv, int recv_bytes) | |
367 | { | |
368 | struct intel_dp_priv *dp_priv = container_of(adapter, | |
369 | struct intel_dp_priv, | |
370 | adapter); | |
371 | struct intel_output *intel_output = dp_priv->intel_output; | |
372 | ||
373 | return intel_dp_aux_ch(intel_output, | |
374 | send, send_bytes, recv, recv_bytes); | |
375 | } | |
376 | ||
377 | static int | |
378 | intel_dp_i2c_init(struct intel_output *intel_output, const char *name) | |
379 | { | |
380 | struct intel_dp_priv *dp_priv = intel_output->dev_priv; | |
381 | ||
382 | DRM_ERROR("i2c_init %s\n", name); | |
383 | dp_priv->algo.running = false; | |
384 | dp_priv->algo.address = 0; | |
385 | dp_priv->algo.aux_ch = intel_dp_i2c_aux_ch; | |
386 | ||
387 | memset(&dp_priv->adapter, '\0', sizeof (dp_priv->adapter)); | |
388 | dp_priv->adapter.owner = THIS_MODULE; | |
389 | dp_priv->adapter.class = I2C_CLASS_DDC; | |
eebc863e ZW |
390 | strncpy (dp_priv->adapter.name, name, sizeof(dp_priv->adapter.name) - 1); |
391 | dp_priv->adapter.name[sizeof(dp_priv->adapter.name) - 1] = '\0'; | |
a4fc5ed6 KP |
392 | dp_priv->adapter.algo_data = &dp_priv->algo; |
393 | dp_priv->adapter.dev.parent = &intel_output->base.kdev; | |
394 | ||
395 | return i2c_dp_aux_add_bus(&dp_priv->adapter); | |
396 | } | |
397 | ||
398 | static bool | |
399 | intel_dp_mode_fixup(struct drm_encoder *encoder, struct drm_display_mode *mode, | |
400 | struct drm_display_mode *adjusted_mode) | |
401 | { | |
402 | struct intel_output *intel_output = enc_to_intel_output(encoder); | |
403 | struct intel_dp_priv *dp_priv = intel_output->dev_priv; | |
404 | int lane_count, clock; | |
405 | int max_lane_count = intel_dp_max_lane_count(intel_output); | |
406 | int max_clock = intel_dp_max_link_bw(intel_output) == DP_LINK_BW_2_7 ? 1 : 0; | |
407 | static int bws[2] = { DP_LINK_BW_1_62, DP_LINK_BW_2_7 }; | |
408 | ||
409 | for (lane_count = 1; lane_count <= max_lane_count; lane_count <<= 1) { | |
410 | for (clock = 0; clock <= max_clock; clock++) { | |
411 | int link_avail = intel_dp_link_clock(bws[clock]) * lane_count; | |
412 | ||
413 | if (intel_dp_link_required(mode->clock) <= link_avail) { | |
414 | dp_priv->link_bw = bws[clock]; | |
415 | dp_priv->lane_count = lane_count; | |
416 | adjusted_mode->clock = intel_dp_link_clock(dp_priv->link_bw); | |
1ae8c0a5 | 417 | DRM_DEBUG("Display port link bw %02x lane count %d clock %d\n", |
a4fc5ed6 KP |
418 | dp_priv->link_bw, dp_priv->lane_count, |
419 | adjusted_mode->clock); | |
420 | return true; | |
421 | } | |
422 | } | |
423 | } | |
424 | return false; | |
425 | } | |
426 | ||
427 | struct intel_dp_m_n { | |
428 | uint32_t tu; | |
429 | uint32_t gmch_m; | |
430 | uint32_t gmch_n; | |
431 | uint32_t link_m; | |
432 | uint32_t link_n; | |
433 | }; | |
434 | ||
435 | static void | |
436 | intel_reduce_ratio(uint32_t *num, uint32_t *den) | |
437 | { | |
438 | while (*num > 0xffffff || *den > 0xffffff) { | |
439 | *num >>= 1; | |
440 | *den >>= 1; | |
441 | } | |
442 | } | |
443 | ||
444 | static void | |
445 | intel_dp_compute_m_n(int bytes_per_pixel, | |
446 | int nlanes, | |
447 | int pixel_clock, | |
448 | int link_clock, | |
449 | struct intel_dp_m_n *m_n) | |
450 | { | |
451 | m_n->tu = 64; | |
452 | m_n->gmch_m = pixel_clock * bytes_per_pixel; | |
453 | m_n->gmch_n = link_clock * nlanes; | |
454 | intel_reduce_ratio(&m_n->gmch_m, &m_n->gmch_n); | |
455 | m_n->link_m = pixel_clock; | |
456 | m_n->link_n = link_clock; | |
457 | intel_reduce_ratio(&m_n->link_m, &m_n->link_n); | |
458 | } | |
459 | ||
460 | void | |
461 | intel_dp_set_m_n(struct drm_crtc *crtc, struct drm_display_mode *mode, | |
462 | struct drm_display_mode *adjusted_mode) | |
463 | { | |
464 | struct drm_device *dev = crtc->dev; | |
465 | struct drm_mode_config *mode_config = &dev->mode_config; | |
466 | struct drm_connector *connector; | |
467 | struct drm_i915_private *dev_priv = dev->dev_private; | |
468 | struct intel_crtc *intel_crtc = to_intel_crtc(crtc); | |
469 | int lane_count = 4; | |
470 | struct intel_dp_m_n m_n; | |
471 | ||
472 | /* | |
473 | * Find the lane count in the intel_output private | |
474 | */ | |
475 | list_for_each_entry(connector, &mode_config->connector_list, head) { | |
476 | struct intel_output *intel_output = to_intel_output(connector); | |
477 | struct intel_dp_priv *dp_priv = intel_output->dev_priv; | |
478 | ||
479 | if (!connector->encoder || connector->encoder->crtc != crtc) | |
480 | continue; | |
481 | ||
482 | if (intel_output->type == INTEL_OUTPUT_DISPLAYPORT) { | |
483 | lane_count = dp_priv->lane_count; | |
484 | break; | |
485 | } | |
486 | } | |
487 | ||
488 | /* | |
489 | * Compute the GMCH and Link ratios. The '3' here is | |
490 | * the number of bytes_per_pixel post-LUT, which we always | |
491 | * set up for 8-bits of R/G/B, or 3 bytes total. | |
492 | */ | |
493 | intel_dp_compute_m_n(3, lane_count, | |
494 | mode->clock, adjusted_mode->clock, &m_n); | |
495 | ||
496 | if (intel_crtc->pipe == 0) { | |
497 | I915_WRITE(PIPEA_GMCH_DATA_M, | |
498 | ((m_n.tu - 1) << PIPE_GMCH_DATA_M_TU_SIZE_SHIFT) | | |
499 | m_n.gmch_m); | |
500 | I915_WRITE(PIPEA_GMCH_DATA_N, | |
501 | m_n.gmch_n); | |
502 | I915_WRITE(PIPEA_DP_LINK_M, m_n.link_m); | |
503 | I915_WRITE(PIPEA_DP_LINK_N, m_n.link_n); | |
504 | } else { | |
505 | I915_WRITE(PIPEB_GMCH_DATA_M, | |
506 | ((m_n.tu - 1) << PIPE_GMCH_DATA_M_TU_SIZE_SHIFT) | | |
507 | m_n.gmch_m); | |
508 | I915_WRITE(PIPEB_GMCH_DATA_N, | |
509 | m_n.gmch_n); | |
510 | I915_WRITE(PIPEB_DP_LINK_M, m_n.link_m); | |
511 | I915_WRITE(PIPEB_DP_LINK_N, m_n.link_n); | |
512 | } | |
513 | } | |
514 | ||
515 | static void | |
516 | intel_dp_mode_set(struct drm_encoder *encoder, struct drm_display_mode *mode, | |
517 | struct drm_display_mode *adjusted_mode) | |
518 | { | |
519 | struct intel_output *intel_output = enc_to_intel_output(encoder); | |
520 | struct intel_dp_priv *dp_priv = intel_output->dev_priv; | |
521 | struct drm_crtc *crtc = intel_output->enc.crtc; | |
522 | struct intel_crtc *intel_crtc = to_intel_crtc(crtc); | |
523 | ||
524 | dp_priv->DP = (DP_LINK_TRAIN_OFF | | |
525 | DP_VOLTAGE_0_4 | | |
526 | DP_PRE_EMPHASIS_0 | | |
527 | DP_SYNC_VS_HIGH | | |
528 | DP_SYNC_HS_HIGH); | |
529 | ||
530 | switch (dp_priv->lane_count) { | |
531 | case 1: | |
532 | dp_priv->DP |= DP_PORT_WIDTH_1; | |
533 | break; | |
534 | case 2: | |
535 | dp_priv->DP |= DP_PORT_WIDTH_2; | |
536 | break; | |
537 | case 4: | |
538 | dp_priv->DP |= DP_PORT_WIDTH_4; | |
539 | break; | |
540 | } | |
541 | if (dp_priv->has_audio) | |
542 | dp_priv->DP |= DP_AUDIO_OUTPUT_ENABLE; | |
543 | ||
544 | memset(dp_priv->link_configuration, 0, DP_LINK_CONFIGURATION_SIZE); | |
545 | dp_priv->link_configuration[0] = dp_priv->link_bw; | |
546 | dp_priv->link_configuration[1] = dp_priv->lane_count; | |
547 | ||
548 | /* | |
549 | * Check for DPCD version > 1.1, | |
550 | * enable enahanced frame stuff in that case | |
551 | */ | |
552 | if (dp_priv->dpcd[0] >= 0x11) { | |
553 | dp_priv->link_configuration[1] |= DP_LANE_COUNT_ENHANCED_FRAME_EN; | |
554 | dp_priv->DP |= DP_ENHANCED_FRAMING; | |
555 | } | |
556 | ||
557 | if (intel_crtc->pipe == 1) | |
558 | dp_priv->DP |= DP_PIPEB_SELECT; | |
559 | } | |
560 | ||
561 | ||
562 | static void | |
563 | intel_dp_dpms(struct drm_encoder *encoder, int mode) | |
564 | { | |
565 | struct intel_output *intel_output = enc_to_intel_output(encoder); | |
566 | struct intel_dp_priv *dp_priv = intel_output->dev_priv; | |
567 | struct drm_device *dev = intel_output->base.dev; | |
568 | struct drm_i915_private *dev_priv = dev->dev_private; | |
569 | uint32_t dp_reg = I915_READ(dp_priv->output_reg); | |
570 | ||
571 | if (mode != DRM_MODE_DPMS_ON) { | |
572 | if (dp_reg & DP_PORT_EN) | |
573 | intel_dp_link_down(intel_output, dp_priv->DP); | |
574 | } else { | |
575 | if (!(dp_reg & DP_PORT_EN)) | |
576 | intel_dp_link_train(intel_output, dp_priv->DP, dp_priv->link_configuration); | |
577 | } | |
c8110e52 | 578 | dp_priv->dpms_mode = mode; |
a4fc5ed6 KP |
579 | } |
580 | ||
581 | /* | |
582 | * Fetch AUX CH registers 0x202 - 0x207 which contain | |
583 | * link status information | |
584 | */ | |
585 | static bool | |
586 | intel_dp_get_link_status(struct intel_output *intel_output, | |
587 | uint8_t link_status[DP_LINK_STATUS_SIZE]) | |
588 | { | |
589 | int ret; | |
590 | ||
591 | ret = intel_dp_aux_native_read(intel_output, | |
592 | DP_LANE0_1_STATUS, | |
593 | link_status, DP_LINK_STATUS_SIZE); | |
594 | if (ret != DP_LINK_STATUS_SIZE) | |
595 | return false; | |
596 | return true; | |
597 | } | |
598 | ||
599 | static uint8_t | |
600 | intel_dp_link_status(uint8_t link_status[DP_LINK_STATUS_SIZE], | |
601 | int r) | |
602 | { | |
603 | return link_status[r - DP_LANE0_1_STATUS]; | |
604 | } | |
605 | ||
606 | static void | |
607 | intel_dp_save(struct drm_connector *connector) | |
608 | { | |
609 | struct intel_output *intel_output = to_intel_output(connector); | |
610 | struct drm_device *dev = intel_output->base.dev; | |
611 | struct drm_i915_private *dev_priv = dev->dev_private; | |
612 | struct intel_dp_priv *dp_priv = intel_output->dev_priv; | |
613 | ||
614 | dp_priv->save_DP = I915_READ(dp_priv->output_reg); | |
615 | intel_dp_aux_native_read(intel_output, DP_LINK_BW_SET, | |
616 | dp_priv->save_link_configuration, | |
617 | sizeof (dp_priv->save_link_configuration)); | |
618 | } | |
619 | ||
620 | static uint8_t | |
621 | intel_get_adjust_request_voltage(uint8_t link_status[DP_LINK_STATUS_SIZE], | |
622 | int lane) | |
623 | { | |
624 | int i = DP_ADJUST_REQUEST_LANE0_1 + (lane >> 1); | |
625 | int s = ((lane & 1) ? | |
626 | DP_ADJUST_VOLTAGE_SWING_LANE1_SHIFT : | |
627 | DP_ADJUST_VOLTAGE_SWING_LANE0_SHIFT); | |
628 | uint8_t l = intel_dp_link_status(link_status, i); | |
629 | ||
630 | return ((l >> s) & 3) << DP_TRAIN_VOLTAGE_SWING_SHIFT; | |
631 | } | |
632 | ||
633 | static uint8_t | |
634 | intel_get_adjust_request_pre_emphasis(uint8_t link_status[DP_LINK_STATUS_SIZE], | |
635 | int lane) | |
636 | { | |
637 | int i = DP_ADJUST_REQUEST_LANE0_1 + (lane >> 1); | |
638 | int s = ((lane & 1) ? | |
639 | DP_ADJUST_PRE_EMPHASIS_LANE1_SHIFT : | |
640 | DP_ADJUST_PRE_EMPHASIS_LANE0_SHIFT); | |
641 | uint8_t l = intel_dp_link_status(link_status, i); | |
642 | ||
643 | return ((l >> s) & 3) << DP_TRAIN_PRE_EMPHASIS_SHIFT; | |
644 | } | |
645 | ||
646 | ||
647 | #if 0 | |
648 | static char *voltage_names[] = { | |
649 | "0.4V", "0.6V", "0.8V", "1.2V" | |
650 | }; | |
651 | static char *pre_emph_names[] = { | |
652 | "0dB", "3.5dB", "6dB", "9.5dB" | |
653 | }; | |
654 | static char *link_train_names[] = { | |
655 | "pattern 1", "pattern 2", "idle", "off" | |
656 | }; | |
657 | #endif | |
658 | ||
659 | /* | |
660 | * These are source-specific values; current Intel hardware supports | |
661 | * a maximum voltage of 800mV and a maximum pre-emphasis of 6dB | |
662 | */ | |
663 | #define I830_DP_VOLTAGE_MAX DP_TRAIN_VOLTAGE_SWING_800 | |
664 | ||
665 | static uint8_t | |
666 | intel_dp_pre_emphasis_max(uint8_t voltage_swing) | |
667 | { | |
668 | switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) { | |
669 | case DP_TRAIN_VOLTAGE_SWING_400: | |
670 | return DP_TRAIN_PRE_EMPHASIS_6; | |
671 | case DP_TRAIN_VOLTAGE_SWING_600: | |
672 | return DP_TRAIN_PRE_EMPHASIS_6; | |
673 | case DP_TRAIN_VOLTAGE_SWING_800: | |
674 | return DP_TRAIN_PRE_EMPHASIS_3_5; | |
675 | case DP_TRAIN_VOLTAGE_SWING_1200: | |
676 | default: | |
677 | return DP_TRAIN_PRE_EMPHASIS_0; | |
678 | } | |
679 | } | |
680 | ||
681 | static void | |
682 | intel_get_adjust_train(struct intel_output *intel_output, | |
683 | uint8_t link_status[DP_LINK_STATUS_SIZE], | |
684 | int lane_count, | |
685 | uint8_t train_set[4]) | |
686 | { | |
687 | uint8_t v = 0; | |
688 | uint8_t p = 0; | |
689 | int lane; | |
690 | ||
691 | for (lane = 0; lane < lane_count; lane++) { | |
692 | uint8_t this_v = intel_get_adjust_request_voltage(link_status, lane); | |
693 | uint8_t this_p = intel_get_adjust_request_pre_emphasis(link_status, lane); | |
694 | ||
695 | if (this_v > v) | |
696 | v = this_v; | |
697 | if (this_p > p) | |
698 | p = this_p; | |
699 | } | |
700 | ||
701 | if (v >= I830_DP_VOLTAGE_MAX) | |
702 | v = I830_DP_VOLTAGE_MAX | DP_TRAIN_MAX_SWING_REACHED; | |
703 | ||
704 | if (p >= intel_dp_pre_emphasis_max(v)) | |
705 | p = intel_dp_pre_emphasis_max(v) | DP_TRAIN_MAX_PRE_EMPHASIS_REACHED; | |
706 | ||
707 | for (lane = 0; lane < 4; lane++) | |
708 | train_set[lane] = v | p; | |
709 | } | |
710 | ||
711 | static uint32_t | |
712 | intel_dp_signal_levels(uint8_t train_set, int lane_count) | |
713 | { | |
714 | uint32_t signal_levels = 0; | |
715 | ||
716 | switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) { | |
717 | case DP_TRAIN_VOLTAGE_SWING_400: | |
718 | default: | |
719 | signal_levels |= DP_VOLTAGE_0_4; | |
720 | break; | |
721 | case DP_TRAIN_VOLTAGE_SWING_600: | |
722 | signal_levels |= DP_VOLTAGE_0_6; | |
723 | break; | |
724 | case DP_TRAIN_VOLTAGE_SWING_800: | |
725 | signal_levels |= DP_VOLTAGE_0_8; | |
726 | break; | |
727 | case DP_TRAIN_VOLTAGE_SWING_1200: | |
728 | signal_levels |= DP_VOLTAGE_1_2; | |
729 | break; | |
730 | } | |
731 | switch (train_set & DP_TRAIN_PRE_EMPHASIS_MASK) { | |
732 | case DP_TRAIN_PRE_EMPHASIS_0: | |
733 | default: | |
734 | signal_levels |= DP_PRE_EMPHASIS_0; | |
735 | break; | |
736 | case DP_TRAIN_PRE_EMPHASIS_3_5: | |
737 | signal_levels |= DP_PRE_EMPHASIS_3_5; | |
738 | break; | |
739 | case DP_TRAIN_PRE_EMPHASIS_6: | |
740 | signal_levels |= DP_PRE_EMPHASIS_6; | |
741 | break; | |
742 | case DP_TRAIN_PRE_EMPHASIS_9_5: | |
743 | signal_levels |= DP_PRE_EMPHASIS_9_5; | |
744 | break; | |
745 | } | |
746 | return signal_levels; | |
747 | } | |
748 | ||
749 | static uint8_t | |
750 | intel_get_lane_status(uint8_t link_status[DP_LINK_STATUS_SIZE], | |
751 | int lane) | |
752 | { | |
753 | int i = DP_LANE0_1_STATUS + (lane >> 1); | |
754 | int s = (lane & 1) * 4; | |
755 | uint8_t l = intel_dp_link_status(link_status, i); | |
756 | ||
757 | return (l >> s) & 0xf; | |
758 | } | |
759 | ||
760 | /* Check for clock recovery is done on all channels */ | |
761 | static bool | |
762 | intel_clock_recovery_ok(uint8_t link_status[DP_LINK_STATUS_SIZE], int lane_count) | |
763 | { | |
764 | int lane; | |
765 | uint8_t lane_status; | |
766 | ||
767 | for (lane = 0; lane < lane_count; lane++) { | |
768 | lane_status = intel_get_lane_status(link_status, lane); | |
769 | if ((lane_status & DP_LANE_CR_DONE) == 0) | |
770 | return false; | |
771 | } | |
772 | return true; | |
773 | } | |
774 | ||
775 | /* Check to see if channel eq is done on all channels */ | |
776 | #define CHANNEL_EQ_BITS (DP_LANE_CR_DONE|\ | |
777 | DP_LANE_CHANNEL_EQ_DONE|\ | |
778 | DP_LANE_SYMBOL_LOCKED) | |
779 | static bool | |
780 | intel_channel_eq_ok(uint8_t link_status[DP_LINK_STATUS_SIZE], int lane_count) | |
781 | { | |
782 | uint8_t lane_align; | |
783 | uint8_t lane_status; | |
784 | int lane; | |
785 | ||
786 | lane_align = intel_dp_link_status(link_status, | |
787 | DP_LANE_ALIGN_STATUS_UPDATED); | |
788 | if ((lane_align & DP_INTERLANE_ALIGN_DONE) == 0) | |
789 | return false; | |
790 | for (lane = 0; lane < lane_count; lane++) { | |
791 | lane_status = intel_get_lane_status(link_status, lane); | |
792 | if ((lane_status & CHANNEL_EQ_BITS) != CHANNEL_EQ_BITS) | |
793 | return false; | |
794 | } | |
795 | return true; | |
796 | } | |
797 | ||
798 | static bool | |
799 | intel_dp_set_link_train(struct intel_output *intel_output, | |
800 | uint32_t dp_reg_value, | |
801 | uint8_t dp_train_pat, | |
802 | uint8_t train_set[4], | |
803 | bool first) | |
804 | { | |
805 | struct drm_device *dev = intel_output->base.dev; | |
806 | struct drm_i915_private *dev_priv = dev->dev_private; | |
807 | struct intel_dp_priv *dp_priv = intel_output->dev_priv; | |
808 | int ret; | |
809 | ||
810 | I915_WRITE(dp_priv->output_reg, dp_reg_value); | |
811 | POSTING_READ(dp_priv->output_reg); | |
812 | if (first) | |
813 | intel_wait_for_vblank(dev); | |
814 | ||
815 | intel_dp_aux_native_write_1(intel_output, | |
816 | DP_TRAINING_PATTERN_SET, | |
817 | dp_train_pat); | |
818 | ||
819 | ret = intel_dp_aux_native_write(intel_output, | |
820 | DP_TRAINING_LANE0_SET, train_set, 4); | |
821 | if (ret != 4) | |
822 | return false; | |
823 | ||
824 | return true; | |
825 | } | |
826 | ||
827 | static void | |
828 | intel_dp_link_train(struct intel_output *intel_output, uint32_t DP, | |
829 | uint8_t link_configuration[DP_LINK_CONFIGURATION_SIZE]) | |
830 | { | |
831 | struct drm_device *dev = intel_output->base.dev; | |
832 | struct drm_i915_private *dev_priv = dev->dev_private; | |
833 | struct intel_dp_priv *dp_priv = intel_output->dev_priv; | |
834 | uint8_t train_set[4]; | |
835 | uint8_t link_status[DP_LINK_STATUS_SIZE]; | |
836 | int i; | |
837 | uint8_t voltage; | |
838 | bool clock_recovery = false; | |
839 | bool channel_eq = false; | |
840 | bool first = true; | |
841 | int tries; | |
842 | ||
843 | /* Write the link configuration data */ | |
844 | intel_dp_aux_native_write(intel_output, 0x100, | |
845 | link_configuration, DP_LINK_CONFIGURATION_SIZE); | |
846 | ||
847 | DP |= DP_PORT_EN; | |
848 | DP &= ~DP_LINK_TRAIN_MASK; | |
849 | memset(train_set, 0, 4); | |
850 | voltage = 0xff; | |
851 | tries = 0; | |
852 | clock_recovery = false; | |
853 | for (;;) { | |
854 | /* Use train_set[0] to set the voltage and pre emphasis values */ | |
855 | uint32_t signal_levels = intel_dp_signal_levels(train_set[0], dp_priv->lane_count); | |
856 | DP = (DP & ~(DP_VOLTAGE_MASK|DP_PRE_EMPHASIS_MASK)) | signal_levels; | |
857 | ||
858 | if (!intel_dp_set_link_train(intel_output, DP | DP_LINK_TRAIN_PAT_1, | |
859 | DP_TRAINING_PATTERN_1, train_set, first)) | |
860 | break; | |
861 | first = false; | |
862 | /* Set training pattern 1 */ | |
863 | ||
864 | udelay(100); | |
865 | if (!intel_dp_get_link_status(intel_output, link_status)) | |
866 | break; | |
867 | ||
868 | if (intel_clock_recovery_ok(link_status, dp_priv->lane_count)) { | |
869 | clock_recovery = true; | |
870 | break; | |
871 | } | |
872 | ||
873 | /* Check to see if we've tried the max voltage */ | |
874 | for (i = 0; i < dp_priv->lane_count; i++) | |
875 | if ((train_set[i] & DP_TRAIN_MAX_SWING_REACHED) == 0) | |
876 | break; | |
877 | if (i == dp_priv->lane_count) | |
878 | break; | |
879 | ||
880 | /* Check to see if we've tried the same voltage 5 times */ | |
881 | if ((train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK) == voltage) { | |
882 | ++tries; | |
883 | if (tries == 5) | |
884 | break; | |
885 | } else | |
886 | tries = 0; | |
887 | voltage = train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK; | |
888 | ||
889 | /* Compute new train_set as requested by target */ | |
890 | intel_get_adjust_train(intel_output, link_status, dp_priv->lane_count, train_set); | |
891 | } | |
892 | ||
893 | /* channel equalization */ | |
894 | tries = 0; | |
895 | channel_eq = false; | |
896 | for (;;) { | |
897 | /* Use train_set[0] to set the voltage and pre emphasis values */ | |
898 | uint32_t signal_levels = intel_dp_signal_levels(train_set[0], dp_priv->lane_count); | |
899 | DP = (DP & ~(DP_VOLTAGE_MASK|DP_PRE_EMPHASIS_MASK)) | signal_levels; | |
900 | ||
901 | /* channel eq pattern */ | |
902 | if (!intel_dp_set_link_train(intel_output, DP | DP_LINK_TRAIN_PAT_2, | |
903 | DP_TRAINING_PATTERN_2, train_set, | |
904 | false)) | |
905 | break; | |
906 | ||
907 | udelay(400); | |
908 | if (!intel_dp_get_link_status(intel_output, link_status)) | |
909 | break; | |
910 | ||
911 | if (intel_channel_eq_ok(link_status, dp_priv->lane_count)) { | |
912 | channel_eq = true; | |
913 | break; | |
914 | } | |
915 | ||
916 | /* Try 5 times */ | |
917 | if (tries > 5) | |
918 | break; | |
919 | ||
920 | /* Compute new train_set as requested by target */ | |
921 | intel_get_adjust_train(intel_output, link_status, dp_priv->lane_count, train_set); | |
922 | ++tries; | |
923 | } | |
924 | ||
925 | I915_WRITE(dp_priv->output_reg, DP | DP_LINK_TRAIN_OFF); | |
926 | POSTING_READ(dp_priv->output_reg); | |
927 | intel_dp_aux_native_write_1(intel_output, | |
928 | DP_TRAINING_PATTERN_SET, DP_TRAINING_PATTERN_DISABLE); | |
929 | } | |
930 | ||
931 | static void | |
932 | intel_dp_link_down(struct intel_output *intel_output, uint32_t DP) | |
933 | { | |
934 | struct drm_device *dev = intel_output->base.dev; | |
935 | struct drm_i915_private *dev_priv = dev->dev_private; | |
936 | struct intel_dp_priv *dp_priv = intel_output->dev_priv; | |
937 | ||
938 | I915_WRITE(dp_priv->output_reg, DP & ~DP_PORT_EN); | |
939 | POSTING_READ(dp_priv->output_reg); | |
940 | } | |
941 | ||
942 | static void | |
943 | intel_dp_restore(struct drm_connector *connector) | |
944 | { | |
945 | struct intel_output *intel_output = to_intel_output(connector); | |
946 | struct intel_dp_priv *dp_priv = intel_output->dev_priv; | |
947 | ||
948 | if (dp_priv->save_DP & DP_PORT_EN) | |
949 | intel_dp_link_train(intel_output, dp_priv->save_DP, dp_priv->save_link_configuration); | |
950 | else | |
951 | intel_dp_link_down(intel_output, dp_priv->save_DP); | |
952 | } | |
953 | ||
a4fc5ed6 KP |
954 | /* |
955 | * According to DP spec | |
956 | * 5.1.2: | |
957 | * 1. Read DPCD | |
958 | * 2. Configure link according to Receiver Capabilities | |
959 | * 3. Use Link Training from 2.5.3.3 and 3.5.1.3 | |
960 | * 4. Check link status on receipt of hot-plug interrupt | |
961 | */ | |
962 | ||
963 | static void | |
964 | intel_dp_check_link_status(struct intel_output *intel_output) | |
965 | { | |
966 | struct intel_dp_priv *dp_priv = intel_output->dev_priv; | |
967 | uint8_t link_status[DP_LINK_STATUS_SIZE]; | |
968 | ||
969 | if (!intel_output->enc.crtc) | |
970 | return; | |
971 | ||
972 | if (!intel_dp_get_link_status(intel_output, link_status)) { | |
973 | intel_dp_link_down(intel_output, dp_priv->DP); | |
974 | return; | |
975 | } | |
976 | ||
977 | if (!intel_channel_eq_ok(link_status, dp_priv->lane_count)) | |
978 | intel_dp_link_train(intel_output, dp_priv->DP, dp_priv->link_configuration); | |
979 | } | |
a4fc5ed6 KP |
980 | |
981 | /** | |
982 | * Uses CRT_HOTPLUG_EN and CRT_HOTPLUG_STAT to detect DP connection. | |
983 | * | |
984 | * \return true if DP port is connected. | |
985 | * \return false if DP port is disconnected. | |
986 | */ | |
987 | static enum drm_connector_status | |
988 | intel_dp_detect(struct drm_connector *connector) | |
989 | { | |
990 | struct intel_output *intel_output = to_intel_output(connector); | |
991 | struct drm_device *dev = intel_output->base.dev; | |
992 | struct drm_i915_private *dev_priv = dev->dev_private; | |
993 | struct intel_dp_priv *dp_priv = intel_output->dev_priv; | |
994 | uint32_t temp, bit; | |
995 | enum drm_connector_status status; | |
996 | ||
997 | dp_priv->has_audio = false; | |
998 | ||
999 | temp = I915_READ(PORT_HOTPLUG_EN); | |
1000 | ||
1001 | I915_WRITE(PORT_HOTPLUG_EN, | |
1002 | temp | | |
1003 | DPB_HOTPLUG_INT_EN | | |
1004 | DPC_HOTPLUG_INT_EN | | |
1005 | DPD_HOTPLUG_INT_EN); | |
1006 | ||
1007 | POSTING_READ(PORT_HOTPLUG_EN); | |
1008 | ||
1009 | switch (dp_priv->output_reg) { | |
1010 | case DP_B: | |
1011 | bit = DPB_HOTPLUG_INT_STATUS; | |
1012 | break; | |
1013 | case DP_C: | |
1014 | bit = DPC_HOTPLUG_INT_STATUS; | |
1015 | break; | |
1016 | case DP_D: | |
1017 | bit = DPD_HOTPLUG_INT_STATUS; | |
1018 | break; | |
1019 | default: | |
1020 | return connector_status_unknown; | |
1021 | } | |
1022 | ||
1023 | temp = I915_READ(PORT_HOTPLUG_STAT); | |
1024 | ||
1025 | if ((temp & bit) == 0) | |
1026 | return connector_status_disconnected; | |
1027 | ||
1028 | status = connector_status_disconnected; | |
1029 | if (intel_dp_aux_native_read(intel_output, | |
1030 | 0x000, dp_priv->dpcd, | |
1031 | sizeof (dp_priv->dpcd)) == sizeof (dp_priv->dpcd)) | |
1032 | { | |
1033 | if (dp_priv->dpcd[0] != 0) | |
1034 | status = connector_status_connected; | |
1035 | } | |
1036 | return status; | |
1037 | } | |
1038 | ||
1039 | static int intel_dp_get_modes(struct drm_connector *connector) | |
1040 | { | |
1041 | struct intel_output *intel_output = to_intel_output(connector); | |
1042 | ||
1043 | /* We should parse the EDID data and find out if it has an audio sink | |
1044 | */ | |
1045 | ||
1046 | return intel_ddc_get_modes(intel_output); | |
1047 | } | |
1048 | ||
1049 | static void | |
1050 | intel_dp_destroy (struct drm_connector *connector) | |
1051 | { | |
1052 | struct intel_output *intel_output = to_intel_output(connector); | |
1053 | ||
1054 | if (intel_output->i2c_bus) | |
1055 | intel_i2c_destroy(intel_output->i2c_bus); | |
1056 | drm_sysfs_connector_remove(connector); | |
1057 | drm_connector_cleanup(connector); | |
1058 | kfree(intel_output); | |
1059 | } | |
1060 | ||
1061 | static const struct drm_encoder_helper_funcs intel_dp_helper_funcs = { | |
1062 | .dpms = intel_dp_dpms, | |
1063 | .mode_fixup = intel_dp_mode_fixup, | |
1064 | .prepare = intel_encoder_prepare, | |
1065 | .mode_set = intel_dp_mode_set, | |
1066 | .commit = intel_encoder_commit, | |
1067 | }; | |
1068 | ||
1069 | static const struct drm_connector_funcs intel_dp_connector_funcs = { | |
1070 | .dpms = drm_helper_connector_dpms, | |
1071 | .save = intel_dp_save, | |
1072 | .restore = intel_dp_restore, | |
1073 | .detect = intel_dp_detect, | |
1074 | .fill_modes = drm_helper_probe_single_connector_modes, | |
1075 | .destroy = intel_dp_destroy, | |
1076 | }; | |
1077 | ||
1078 | static const struct drm_connector_helper_funcs intel_dp_connector_helper_funcs = { | |
1079 | .get_modes = intel_dp_get_modes, | |
1080 | .mode_valid = intel_dp_mode_valid, | |
1081 | .best_encoder = intel_best_encoder, | |
1082 | }; | |
1083 | ||
1084 | static void intel_dp_enc_destroy(struct drm_encoder *encoder) | |
1085 | { | |
1086 | drm_encoder_cleanup(encoder); | |
1087 | } | |
1088 | ||
1089 | static const struct drm_encoder_funcs intel_dp_enc_funcs = { | |
1090 | .destroy = intel_dp_enc_destroy, | |
1091 | }; | |
1092 | ||
c8110e52 KP |
1093 | void |
1094 | intel_dp_hot_plug(struct intel_output *intel_output) | |
1095 | { | |
1096 | struct intel_dp_priv *dp_priv = intel_output->dev_priv; | |
1097 | ||
1098 | if (dp_priv->dpms_mode == DRM_MODE_DPMS_ON) | |
1099 | intel_dp_check_link_status(intel_output); | |
1100 | } | |
1101 | ||
a4fc5ed6 KP |
1102 | void |
1103 | intel_dp_init(struct drm_device *dev, int output_reg) | |
1104 | { | |
1105 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1106 | struct drm_connector *connector; | |
1107 | struct intel_output *intel_output; | |
1108 | struct intel_dp_priv *dp_priv; | |
1109 | ||
1110 | intel_output = kcalloc(sizeof(struct intel_output) + | |
1111 | sizeof(struct intel_dp_priv), 1, GFP_KERNEL); | |
1112 | if (!intel_output) | |
1113 | return; | |
1114 | ||
1115 | dp_priv = (struct intel_dp_priv *)(intel_output + 1); | |
1116 | ||
1117 | connector = &intel_output->base; | |
1118 | drm_connector_init(dev, connector, &intel_dp_connector_funcs, | |
1119 | DRM_MODE_CONNECTOR_DisplayPort); | |
1120 | drm_connector_helper_add(connector, &intel_dp_connector_helper_funcs); | |
1121 | ||
1122 | intel_output->type = INTEL_OUTPUT_DISPLAYPORT; | |
1123 | ||
1124 | connector->interlace_allowed = true; | |
1125 | connector->doublescan_allowed = 0; | |
1126 | ||
1127 | dp_priv->intel_output = intel_output; | |
1128 | dp_priv->output_reg = output_reg; | |
1129 | dp_priv->has_audio = false; | |
c8110e52 | 1130 | dp_priv->dpms_mode = DRM_MODE_DPMS_ON; |
a4fc5ed6 KP |
1131 | intel_output->dev_priv = dp_priv; |
1132 | ||
1133 | drm_encoder_init(dev, &intel_output->enc, &intel_dp_enc_funcs, | |
1134 | DRM_MODE_ENCODER_TMDS); | |
1135 | drm_encoder_helper_add(&intel_output->enc, &intel_dp_helper_funcs); | |
1136 | ||
1137 | drm_mode_connector_attach_encoder(&intel_output->base, | |
1138 | &intel_output->enc); | |
1139 | drm_sysfs_connector_add(connector); | |
1140 | ||
1141 | /* Set up the DDC bus. */ | |
1142 | intel_dp_i2c_init(intel_output, | |
1143 | (output_reg == DP_B) ? "DPDDC-B" : | |
1144 | (output_reg == DP_C) ? "DPDDC-C" : "DPDDC-D"); | |
1145 | intel_output->ddc_bus = &dp_priv->adapter; | |
c8110e52 | 1146 | intel_output->hot_plug = intel_dp_hot_plug; |
a4fc5ed6 KP |
1147 | |
1148 | /* For G4X desktop chip, PEG_BAND_GAP_DATA 3:0 must first be written | |
1149 | * 0xd. Failure to do so will result in spurious interrupts being | |
1150 | * generated on the port when a cable is not attached. | |
1151 | */ | |
1152 | if (IS_G4X(dev) && !IS_GM45(dev)) { | |
1153 | u32 temp = I915_READ(PEG_BAND_GAP_DATA); | |
1154 | I915_WRITE(PEG_BAND_GAP_DATA, (temp & ~0xf) | 0xd); | |
1155 | } | |
1156 | } |