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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> |
2d1a8a48 | 30 | #include <linux/export.h> |
a4fc5ed6 KP |
31 | #include "drmP.h" |
32 | #include "drm.h" | |
33 | #include "drm_crtc.h" | |
34 | #include "drm_crtc_helper.h" | |
d6f24d0f | 35 | #include "drm_edid.h" |
a4fc5ed6 KP |
36 | #include "intel_drv.h" |
37 | #include "i915_drm.h" | |
38 | #include "i915_drv.h" | |
a4fc5ed6 | 39 | |
b091cd92 | 40 | #define DP_RECEIVER_CAP_SIZE 0xf |
a4fc5ed6 KP |
41 | #define DP_LINK_STATUS_SIZE 6 |
42 | #define DP_LINK_CHECK_TIMEOUT (10 * 1000) | |
43 | ||
cfcb0fc9 JB |
44 | /** |
45 | * is_edp - is the given port attached to an eDP panel (either CPU or PCH) | |
46 | * @intel_dp: DP struct | |
47 | * | |
48 | * If a CPU or PCH DP output is attached to an eDP panel, this function | |
49 | * will return true, and false otherwise. | |
50 | */ | |
51 | static bool is_edp(struct intel_dp *intel_dp) | |
52 | { | |
53 | return intel_dp->base.type == INTEL_OUTPUT_EDP; | |
54 | } | |
55 | ||
56 | /** | |
57 | * is_pch_edp - is the port on the PCH and attached to an eDP panel? | |
58 | * @intel_dp: DP struct | |
59 | * | |
60 | * Returns true if the given DP struct corresponds to a PCH DP port attached | |
61 | * to an eDP panel, false otherwise. Helpful for determining whether we | |
62 | * may need FDI resources for a given DP output or not. | |
63 | */ | |
64 | static bool is_pch_edp(struct intel_dp *intel_dp) | |
65 | { | |
66 | return intel_dp->is_pch_edp; | |
67 | } | |
68 | ||
1c95822a AJ |
69 | /** |
70 | * is_cpu_edp - is the port on the CPU and attached to an eDP panel? | |
71 | * @intel_dp: DP struct | |
72 | * | |
73 | * Returns true if the given DP struct corresponds to a CPU eDP port. | |
74 | */ | |
75 | static bool is_cpu_edp(struct intel_dp *intel_dp) | |
76 | { | |
77 | return is_edp(intel_dp) && !is_pch_edp(intel_dp); | |
78 | } | |
79 | ||
df0e9248 CW |
80 | static struct intel_dp *intel_attached_dp(struct drm_connector *connector) |
81 | { | |
82 | return container_of(intel_attached_encoder(connector), | |
83 | struct intel_dp, base); | |
84 | } | |
85 | ||
814948ad JB |
86 | /** |
87 | * intel_encoder_is_pch_edp - is the given encoder a PCH attached eDP? | |
88 | * @encoder: DRM encoder | |
89 | * | |
90 | * Return true if @encoder corresponds to a PCH attached eDP panel. Needed | |
91 | * by intel_display.c. | |
92 | */ | |
93 | bool intel_encoder_is_pch_edp(struct drm_encoder *encoder) | |
94 | { | |
95 | struct intel_dp *intel_dp; | |
96 | ||
97 | if (!encoder) | |
98 | return false; | |
99 | ||
100 | intel_dp = enc_to_intel_dp(encoder); | |
101 | ||
102 | return is_pch_edp(intel_dp); | |
103 | } | |
104 | ||
33a34e4e JB |
105 | static void intel_dp_start_link_train(struct intel_dp *intel_dp); |
106 | static void intel_dp_complete_link_train(struct intel_dp *intel_dp); | |
ea5b213a | 107 | static void intel_dp_link_down(struct intel_dp *intel_dp); |
a4fc5ed6 | 108 | |
32f9d658 | 109 | void |
0206e353 | 110 | intel_edp_link_config(struct intel_encoder *intel_encoder, |
ea5b213a | 111 | int *lane_num, int *link_bw) |
32f9d658 | 112 | { |
ea5b213a | 113 | struct intel_dp *intel_dp = container_of(intel_encoder, struct intel_dp, base); |
32f9d658 | 114 | |
ea5b213a CW |
115 | *lane_num = intel_dp->lane_count; |
116 | if (intel_dp->link_bw == DP_LINK_BW_1_62) | |
32f9d658 | 117 | *link_bw = 162000; |
ea5b213a | 118 | else if (intel_dp->link_bw == DP_LINK_BW_2_7) |
32f9d658 ZW |
119 | *link_bw = 270000; |
120 | } | |
121 | ||
94bf2ced DV |
122 | int |
123 | intel_edp_target_clock(struct intel_encoder *intel_encoder, | |
124 | struct drm_display_mode *mode) | |
125 | { | |
126 | struct intel_dp *intel_dp = container_of(intel_encoder, struct intel_dp, base); | |
127 | ||
128 | if (intel_dp->panel_fixed_mode) | |
129 | return intel_dp->panel_fixed_mode->clock; | |
130 | else | |
131 | return mode->clock; | |
132 | } | |
133 | ||
a4fc5ed6 | 134 | static int |
ea5b213a | 135 | intel_dp_max_lane_count(struct intel_dp *intel_dp) |
a4fc5ed6 | 136 | { |
9a10f401 KP |
137 | int max_lane_count = intel_dp->dpcd[DP_MAX_LANE_COUNT] & 0x1f; |
138 | switch (max_lane_count) { | |
139 | case 1: case 2: case 4: | |
140 | break; | |
141 | default: | |
142 | max_lane_count = 4; | |
a4fc5ed6 KP |
143 | } |
144 | return max_lane_count; | |
145 | } | |
146 | ||
147 | static int | |
ea5b213a | 148 | intel_dp_max_link_bw(struct intel_dp *intel_dp) |
a4fc5ed6 | 149 | { |
7183dc29 | 150 | int max_link_bw = intel_dp->dpcd[DP_MAX_LINK_RATE]; |
a4fc5ed6 KP |
151 | |
152 | switch (max_link_bw) { | |
153 | case DP_LINK_BW_1_62: | |
154 | case DP_LINK_BW_2_7: | |
155 | break; | |
156 | default: | |
157 | max_link_bw = DP_LINK_BW_1_62; | |
158 | break; | |
159 | } | |
160 | return max_link_bw; | |
161 | } | |
162 | ||
163 | static int | |
164 | intel_dp_link_clock(uint8_t link_bw) | |
165 | { | |
166 | if (link_bw == DP_LINK_BW_2_7) | |
167 | return 270000; | |
168 | else | |
169 | return 162000; | |
170 | } | |
171 | ||
cd9dde44 AJ |
172 | /* |
173 | * The units on the numbers in the next two are... bizarre. Examples will | |
174 | * make it clearer; this one parallels an example in the eDP spec. | |
175 | * | |
176 | * intel_dp_max_data_rate for one lane of 2.7GHz evaluates as: | |
177 | * | |
178 | * 270000 * 1 * 8 / 10 == 216000 | |
179 | * | |
180 | * The actual data capacity of that configuration is 2.16Gbit/s, so the | |
181 | * units are decakilobits. ->clock in a drm_display_mode is in kilohertz - | |
182 | * or equivalently, kilopixels per second - so for 1680x1050R it'd be | |
183 | * 119000. At 18bpp that's 2142000 kilobits per second. | |
184 | * | |
185 | * Thus the strange-looking division by 10 in intel_dp_link_required, to | |
186 | * get the result in decakilobits instead of kilobits. | |
187 | */ | |
188 | ||
a4fc5ed6 | 189 | static int |
c898261c | 190 | intel_dp_link_required(int pixel_clock, int bpp) |
a4fc5ed6 | 191 | { |
cd9dde44 | 192 | return (pixel_clock * bpp + 9) / 10; |
a4fc5ed6 KP |
193 | } |
194 | ||
fe27d53e DA |
195 | static int |
196 | intel_dp_max_data_rate(int max_link_clock, int max_lanes) | |
197 | { | |
198 | return (max_link_clock * max_lanes * 8) / 10; | |
199 | } | |
200 | ||
c4867936 DV |
201 | static bool |
202 | intel_dp_adjust_dithering(struct intel_dp *intel_dp, | |
203 | struct drm_display_mode *mode, | |
cb1793ce | 204 | bool adjust_mode) |
c4867936 DV |
205 | { |
206 | int max_link_clock = intel_dp_link_clock(intel_dp_max_link_bw(intel_dp)); | |
207 | int max_lanes = intel_dp_max_lane_count(intel_dp); | |
208 | int max_rate, mode_rate; | |
209 | ||
210 | mode_rate = intel_dp_link_required(mode->clock, 24); | |
211 | max_rate = intel_dp_max_data_rate(max_link_clock, max_lanes); | |
212 | ||
213 | if (mode_rate > max_rate) { | |
214 | mode_rate = intel_dp_link_required(mode->clock, 18); | |
215 | if (mode_rate > max_rate) | |
216 | return false; | |
217 | ||
cb1793ce DV |
218 | if (adjust_mode) |
219 | mode->private_flags | |
c4867936 DV |
220 | |= INTEL_MODE_DP_FORCE_6BPC; |
221 | ||
222 | return true; | |
223 | } | |
224 | ||
225 | return true; | |
226 | } | |
227 | ||
a4fc5ed6 KP |
228 | static int |
229 | intel_dp_mode_valid(struct drm_connector *connector, | |
230 | struct drm_display_mode *mode) | |
231 | { | |
df0e9248 | 232 | struct intel_dp *intel_dp = intel_attached_dp(connector); |
a4fc5ed6 | 233 | |
d15456de KP |
234 | if (is_edp(intel_dp) && intel_dp->panel_fixed_mode) { |
235 | if (mode->hdisplay > intel_dp->panel_fixed_mode->hdisplay) | |
7de56f43 ZY |
236 | return MODE_PANEL; |
237 | ||
d15456de | 238 | if (mode->vdisplay > intel_dp->panel_fixed_mode->vdisplay) |
7de56f43 ZY |
239 | return MODE_PANEL; |
240 | } | |
241 | ||
cb1793ce | 242 | if (!intel_dp_adjust_dithering(intel_dp, mode, false)) |
c4867936 | 243 | return MODE_CLOCK_HIGH; |
a4fc5ed6 KP |
244 | |
245 | if (mode->clock < 10000) | |
246 | return MODE_CLOCK_LOW; | |
247 | ||
0af78a2b DV |
248 | if (mode->flags & DRM_MODE_FLAG_DBLCLK) |
249 | return MODE_H_ILLEGAL; | |
250 | ||
a4fc5ed6 KP |
251 | return MODE_OK; |
252 | } | |
253 | ||
254 | static uint32_t | |
255 | pack_aux(uint8_t *src, int src_bytes) | |
256 | { | |
257 | int i; | |
258 | uint32_t v = 0; | |
259 | ||
260 | if (src_bytes > 4) | |
261 | src_bytes = 4; | |
262 | for (i = 0; i < src_bytes; i++) | |
263 | v |= ((uint32_t) src[i]) << ((3-i) * 8); | |
264 | return v; | |
265 | } | |
266 | ||
267 | static void | |
268 | unpack_aux(uint32_t src, uint8_t *dst, int dst_bytes) | |
269 | { | |
270 | int i; | |
271 | if (dst_bytes > 4) | |
272 | dst_bytes = 4; | |
273 | for (i = 0; i < dst_bytes; i++) | |
274 | dst[i] = src >> ((3-i) * 8); | |
275 | } | |
276 | ||
fb0f8fbf KP |
277 | /* hrawclock is 1/4 the FSB frequency */ |
278 | static int | |
279 | intel_hrawclk(struct drm_device *dev) | |
280 | { | |
281 | struct drm_i915_private *dev_priv = dev->dev_private; | |
282 | uint32_t clkcfg; | |
283 | ||
9473c8f4 VP |
284 | /* There is no CLKCFG reg in Valleyview. VLV hrawclk is 200 MHz */ |
285 | if (IS_VALLEYVIEW(dev)) | |
286 | return 200; | |
287 | ||
fb0f8fbf KP |
288 | clkcfg = I915_READ(CLKCFG); |
289 | switch (clkcfg & CLKCFG_FSB_MASK) { | |
290 | case CLKCFG_FSB_400: | |
291 | return 100; | |
292 | case CLKCFG_FSB_533: | |
293 | return 133; | |
294 | case CLKCFG_FSB_667: | |
295 | return 166; | |
296 | case CLKCFG_FSB_800: | |
297 | return 200; | |
298 | case CLKCFG_FSB_1067: | |
299 | return 266; | |
300 | case CLKCFG_FSB_1333: | |
301 | return 333; | |
302 | /* these two are just a guess; one of them might be right */ | |
303 | case CLKCFG_FSB_1600: | |
304 | case CLKCFG_FSB_1600_ALT: | |
305 | return 400; | |
306 | default: | |
307 | return 133; | |
308 | } | |
309 | } | |
310 | ||
ebf33b18 KP |
311 | static bool ironlake_edp_have_panel_power(struct intel_dp *intel_dp) |
312 | { | |
313 | struct drm_device *dev = intel_dp->base.base.dev; | |
314 | struct drm_i915_private *dev_priv = dev->dev_private; | |
315 | ||
316 | return (I915_READ(PCH_PP_STATUS) & PP_ON) != 0; | |
317 | } | |
318 | ||
319 | static bool ironlake_edp_have_panel_vdd(struct intel_dp *intel_dp) | |
320 | { | |
321 | struct drm_device *dev = intel_dp->base.base.dev; | |
322 | struct drm_i915_private *dev_priv = dev->dev_private; | |
323 | ||
324 | return (I915_READ(PCH_PP_CONTROL) & EDP_FORCE_VDD) != 0; | |
325 | } | |
326 | ||
9b984dae KP |
327 | static void |
328 | intel_dp_check_edp(struct intel_dp *intel_dp) | |
329 | { | |
330 | struct drm_device *dev = intel_dp->base.base.dev; | |
331 | struct drm_i915_private *dev_priv = dev->dev_private; | |
ebf33b18 | 332 | |
9b984dae KP |
333 | if (!is_edp(intel_dp)) |
334 | return; | |
ebf33b18 | 335 | if (!ironlake_edp_have_panel_power(intel_dp) && !ironlake_edp_have_panel_vdd(intel_dp)) { |
9b984dae KP |
336 | WARN(1, "eDP powered off while attempting aux channel communication.\n"); |
337 | DRM_DEBUG_KMS("Status 0x%08x Control 0x%08x\n", | |
ebf33b18 | 338 | I915_READ(PCH_PP_STATUS), |
9b984dae KP |
339 | I915_READ(PCH_PP_CONTROL)); |
340 | } | |
341 | } | |
342 | ||
a4fc5ed6 | 343 | static int |
ea5b213a | 344 | intel_dp_aux_ch(struct intel_dp *intel_dp, |
a4fc5ed6 KP |
345 | uint8_t *send, int send_bytes, |
346 | uint8_t *recv, int recv_size) | |
347 | { | |
ea5b213a | 348 | uint32_t output_reg = intel_dp->output_reg; |
4ef69c7a | 349 | struct drm_device *dev = intel_dp->base.base.dev; |
a4fc5ed6 KP |
350 | struct drm_i915_private *dev_priv = dev->dev_private; |
351 | uint32_t ch_ctl = output_reg + 0x10; | |
352 | uint32_t ch_data = ch_ctl + 4; | |
353 | int i; | |
354 | int recv_bytes; | |
a4fc5ed6 | 355 | uint32_t status; |
fb0f8fbf | 356 | uint32_t aux_clock_divider; |
6b4e0a93 | 357 | int try, precharge; |
a4fc5ed6 | 358 | |
9b984dae | 359 | intel_dp_check_edp(intel_dp); |
a4fc5ed6 | 360 | /* The clock divider is based off the hrawclk, |
fb0f8fbf KP |
361 | * and would like to run at 2MHz. So, take the |
362 | * hrawclk value and divide by 2 and use that | |
6176b8f9 JB |
363 | * |
364 | * Note that PCH attached eDP panels should use a 125MHz input | |
365 | * clock divider. | |
a4fc5ed6 | 366 | */ |
1c95822a | 367 | if (is_cpu_edp(intel_dp)) { |
9473c8f4 VP |
368 | if (IS_VALLEYVIEW(dev)) |
369 | aux_clock_divider = 100; | |
370 | else if (IS_GEN6(dev) || IS_GEN7(dev)) | |
1a2eb460 | 371 | aux_clock_divider = 200; /* SNB & IVB eDP input clock at 400Mhz */ |
e3421a18 ZW |
372 | else |
373 | aux_clock_divider = 225; /* eDP input clock at 450Mhz */ | |
374 | } else if (HAS_PCH_SPLIT(dev)) | |
6919132e | 375 | aux_clock_divider = 63; /* IRL input clock fixed at 125Mhz */ |
5eb08b69 ZW |
376 | else |
377 | aux_clock_divider = intel_hrawclk(dev) / 2; | |
378 | ||
6b4e0a93 DV |
379 | if (IS_GEN6(dev)) |
380 | precharge = 3; | |
381 | else | |
382 | precharge = 5; | |
383 | ||
11bee43e JB |
384 | /* Try to wait for any previous AUX channel activity */ |
385 | for (try = 0; try < 3; try++) { | |
386 | status = I915_READ(ch_ctl); | |
387 | if ((status & DP_AUX_CH_CTL_SEND_BUSY) == 0) | |
388 | break; | |
389 | msleep(1); | |
390 | } | |
391 | ||
392 | if (try == 3) { | |
393 | WARN(1, "dp_aux_ch not started status 0x%08x\n", | |
394 | I915_READ(ch_ctl)); | |
4f7f7b7e CW |
395 | return -EBUSY; |
396 | } | |
397 | ||
fb0f8fbf KP |
398 | /* Must try at least 3 times according to DP spec */ |
399 | for (try = 0; try < 5; try++) { | |
400 | /* Load the send data into the aux channel data registers */ | |
4f7f7b7e CW |
401 | for (i = 0; i < send_bytes; i += 4) |
402 | I915_WRITE(ch_data + i, | |
403 | pack_aux(send + i, send_bytes - i)); | |
0206e353 | 404 | |
fb0f8fbf | 405 | /* Send the command and wait for it to complete */ |
4f7f7b7e CW |
406 | I915_WRITE(ch_ctl, |
407 | DP_AUX_CH_CTL_SEND_BUSY | | |
408 | DP_AUX_CH_CTL_TIME_OUT_400us | | |
409 | (send_bytes << DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT) | | |
410 | (precharge << DP_AUX_CH_CTL_PRECHARGE_2US_SHIFT) | | |
411 | (aux_clock_divider << DP_AUX_CH_CTL_BIT_CLOCK_2X_SHIFT) | | |
412 | DP_AUX_CH_CTL_DONE | | |
413 | DP_AUX_CH_CTL_TIME_OUT_ERROR | | |
414 | DP_AUX_CH_CTL_RECEIVE_ERROR); | |
fb0f8fbf | 415 | for (;;) { |
fb0f8fbf KP |
416 | status = I915_READ(ch_ctl); |
417 | if ((status & DP_AUX_CH_CTL_SEND_BUSY) == 0) | |
418 | break; | |
4f7f7b7e | 419 | udelay(100); |
fb0f8fbf | 420 | } |
0206e353 | 421 | |
fb0f8fbf | 422 | /* Clear done status and any errors */ |
4f7f7b7e CW |
423 | I915_WRITE(ch_ctl, |
424 | status | | |
425 | DP_AUX_CH_CTL_DONE | | |
426 | DP_AUX_CH_CTL_TIME_OUT_ERROR | | |
427 | DP_AUX_CH_CTL_RECEIVE_ERROR); | |
d7e96fea AJ |
428 | |
429 | if (status & (DP_AUX_CH_CTL_TIME_OUT_ERROR | | |
430 | DP_AUX_CH_CTL_RECEIVE_ERROR)) | |
431 | continue; | |
4f7f7b7e | 432 | if (status & DP_AUX_CH_CTL_DONE) |
a4fc5ed6 KP |
433 | break; |
434 | } | |
435 | ||
a4fc5ed6 | 436 | if ((status & DP_AUX_CH_CTL_DONE) == 0) { |
1ae8c0a5 | 437 | DRM_ERROR("dp_aux_ch not done status 0x%08x\n", status); |
a5b3da54 | 438 | return -EBUSY; |
a4fc5ed6 KP |
439 | } |
440 | ||
441 | /* Check for timeout or receive error. | |
442 | * Timeouts occur when the sink is not connected | |
443 | */ | |
a5b3da54 | 444 | if (status & DP_AUX_CH_CTL_RECEIVE_ERROR) { |
1ae8c0a5 | 445 | DRM_ERROR("dp_aux_ch receive error status 0x%08x\n", status); |
a5b3da54 KP |
446 | return -EIO; |
447 | } | |
1ae8c0a5 KP |
448 | |
449 | /* Timeouts occur when the device isn't connected, so they're | |
450 | * "normal" -- don't fill the kernel log with these */ | |
a5b3da54 | 451 | if (status & DP_AUX_CH_CTL_TIME_OUT_ERROR) { |
28c97730 | 452 | DRM_DEBUG_KMS("dp_aux_ch timeout status 0x%08x\n", status); |
a5b3da54 | 453 | return -ETIMEDOUT; |
a4fc5ed6 KP |
454 | } |
455 | ||
456 | /* Unload any bytes sent back from the other side */ | |
457 | recv_bytes = ((status & DP_AUX_CH_CTL_MESSAGE_SIZE_MASK) >> | |
458 | DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT); | |
a4fc5ed6 KP |
459 | if (recv_bytes > recv_size) |
460 | recv_bytes = recv_size; | |
0206e353 | 461 | |
4f7f7b7e CW |
462 | for (i = 0; i < recv_bytes; i += 4) |
463 | unpack_aux(I915_READ(ch_data + i), | |
464 | recv + i, recv_bytes - i); | |
a4fc5ed6 KP |
465 | |
466 | return recv_bytes; | |
467 | } | |
468 | ||
469 | /* Write data to the aux channel in native mode */ | |
470 | static int | |
ea5b213a | 471 | intel_dp_aux_native_write(struct intel_dp *intel_dp, |
a4fc5ed6 KP |
472 | uint16_t address, uint8_t *send, int send_bytes) |
473 | { | |
474 | int ret; | |
475 | uint8_t msg[20]; | |
476 | int msg_bytes; | |
477 | uint8_t ack; | |
478 | ||
9b984dae | 479 | intel_dp_check_edp(intel_dp); |
a4fc5ed6 KP |
480 | if (send_bytes > 16) |
481 | return -1; | |
482 | msg[0] = AUX_NATIVE_WRITE << 4; | |
483 | msg[1] = address >> 8; | |
eebc863e | 484 | msg[2] = address & 0xff; |
a4fc5ed6 KP |
485 | msg[3] = send_bytes - 1; |
486 | memcpy(&msg[4], send, send_bytes); | |
487 | msg_bytes = send_bytes + 4; | |
488 | for (;;) { | |
ea5b213a | 489 | ret = intel_dp_aux_ch(intel_dp, msg, msg_bytes, &ack, 1); |
a4fc5ed6 KP |
490 | if (ret < 0) |
491 | return ret; | |
492 | if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_ACK) | |
493 | break; | |
494 | else if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_DEFER) | |
495 | udelay(100); | |
496 | else | |
a5b3da54 | 497 | return -EIO; |
a4fc5ed6 KP |
498 | } |
499 | return send_bytes; | |
500 | } | |
501 | ||
502 | /* Write a single byte to the aux channel in native mode */ | |
503 | static int | |
ea5b213a | 504 | intel_dp_aux_native_write_1(struct intel_dp *intel_dp, |
a4fc5ed6 KP |
505 | uint16_t address, uint8_t byte) |
506 | { | |
ea5b213a | 507 | return intel_dp_aux_native_write(intel_dp, address, &byte, 1); |
a4fc5ed6 KP |
508 | } |
509 | ||
510 | /* read bytes from a native aux channel */ | |
511 | static int | |
ea5b213a | 512 | intel_dp_aux_native_read(struct intel_dp *intel_dp, |
a4fc5ed6 KP |
513 | uint16_t address, uint8_t *recv, int recv_bytes) |
514 | { | |
515 | uint8_t msg[4]; | |
516 | int msg_bytes; | |
517 | uint8_t reply[20]; | |
518 | int reply_bytes; | |
519 | uint8_t ack; | |
520 | int ret; | |
521 | ||
9b984dae | 522 | intel_dp_check_edp(intel_dp); |
a4fc5ed6 KP |
523 | msg[0] = AUX_NATIVE_READ << 4; |
524 | msg[1] = address >> 8; | |
525 | msg[2] = address & 0xff; | |
526 | msg[3] = recv_bytes - 1; | |
527 | ||
528 | msg_bytes = 4; | |
529 | reply_bytes = recv_bytes + 1; | |
530 | ||
531 | for (;;) { | |
ea5b213a | 532 | ret = intel_dp_aux_ch(intel_dp, msg, msg_bytes, |
a4fc5ed6 | 533 | reply, reply_bytes); |
a5b3da54 KP |
534 | if (ret == 0) |
535 | return -EPROTO; | |
536 | if (ret < 0) | |
a4fc5ed6 KP |
537 | return ret; |
538 | ack = reply[0]; | |
539 | if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_ACK) { | |
540 | memcpy(recv, reply + 1, ret - 1); | |
541 | return ret - 1; | |
542 | } | |
543 | else if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_DEFER) | |
544 | udelay(100); | |
545 | else | |
a5b3da54 | 546 | return -EIO; |
a4fc5ed6 KP |
547 | } |
548 | } | |
549 | ||
550 | static int | |
ab2c0672 DA |
551 | intel_dp_i2c_aux_ch(struct i2c_adapter *adapter, int mode, |
552 | uint8_t write_byte, uint8_t *read_byte) | |
a4fc5ed6 | 553 | { |
ab2c0672 | 554 | struct i2c_algo_dp_aux_data *algo_data = adapter->algo_data; |
ea5b213a CW |
555 | struct intel_dp *intel_dp = container_of(adapter, |
556 | struct intel_dp, | |
557 | adapter); | |
ab2c0672 DA |
558 | uint16_t address = algo_data->address; |
559 | uint8_t msg[5]; | |
560 | uint8_t reply[2]; | |
8316f337 | 561 | unsigned retry; |
ab2c0672 DA |
562 | int msg_bytes; |
563 | int reply_bytes; | |
564 | int ret; | |
565 | ||
9b984dae | 566 | intel_dp_check_edp(intel_dp); |
ab2c0672 DA |
567 | /* Set up the command byte */ |
568 | if (mode & MODE_I2C_READ) | |
569 | msg[0] = AUX_I2C_READ << 4; | |
570 | else | |
571 | msg[0] = AUX_I2C_WRITE << 4; | |
572 | ||
573 | if (!(mode & MODE_I2C_STOP)) | |
574 | msg[0] |= AUX_I2C_MOT << 4; | |
a4fc5ed6 | 575 | |
ab2c0672 DA |
576 | msg[1] = address >> 8; |
577 | msg[2] = address; | |
578 | ||
579 | switch (mode) { | |
580 | case MODE_I2C_WRITE: | |
581 | msg[3] = 0; | |
582 | msg[4] = write_byte; | |
583 | msg_bytes = 5; | |
584 | reply_bytes = 1; | |
585 | break; | |
586 | case MODE_I2C_READ: | |
587 | msg[3] = 0; | |
588 | msg_bytes = 4; | |
589 | reply_bytes = 2; | |
590 | break; | |
591 | default: | |
592 | msg_bytes = 3; | |
593 | reply_bytes = 1; | |
594 | break; | |
595 | } | |
596 | ||
8316f337 DF |
597 | for (retry = 0; retry < 5; retry++) { |
598 | ret = intel_dp_aux_ch(intel_dp, | |
599 | msg, msg_bytes, | |
600 | reply, reply_bytes); | |
ab2c0672 | 601 | if (ret < 0) { |
3ff99164 | 602 | DRM_DEBUG_KMS("aux_ch failed %d\n", ret); |
ab2c0672 DA |
603 | return ret; |
604 | } | |
8316f337 DF |
605 | |
606 | switch (reply[0] & AUX_NATIVE_REPLY_MASK) { | |
607 | case AUX_NATIVE_REPLY_ACK: | |
608 | /* I2C-over-AUX Reply field is only valid | |
609 | * when paired with AUX ACK. | |
610 | */ | |
611 | break; | |
612 | case AUX_NATIVE_REPLY_NACK: | |
613 | DRM_DEBUG_KMS("aux_ch native nack\n"); | |
614 | return -EREMOTEIO; | |
615 | case AUX_NATIVE_REPLY_DEFER: | |
616 | udelay(100); | |
617 | continue; | |
618 | default: | |
619 | DRM_ERROR("aux_ch invalid native reply 0x%02x\n", | |
620 | reply[0]); | |
621 | return -EREMOTEIO; | |
622 | } | |
623 | ||
ab2c0672 DA |
624 | switch (reply[0] & AUX_I2C_REPLY_MASK) { |
625 | case AUX_I2C_REPLY_ACK: | |
626 | if (mode == MODE_I2C_READ) { | |
627 | *read_byte = reply[1]; | |
628 | } | |
629 | return reply_bytes - 1; | |
630 | case AUX_I2C_REPLY_NACK: | |
8316f337 | 631 | DRM_DEBUG_KMS("aux_i2c nack\n"); |
ab2c0672 DA |
632 | return -EREMOTEIO; |
633 | case AUX_I2C_REPLY_DEFER: | |
8316f337 | 634 | DRM_DEBUG_KMS("aux_i2c defer\n"); |
ab2c0672 DA |
635 | udelay(100); |
636 | break; | |
637 | default: | |
8316f337 | 638 | DRM_ERROR("aux_i2c invalid reply 0x%02x\n", reply[0]); |
ab2c0672 DA |
639 | return -EREMOTEIO; |
640 | } | |
641 | } | |
8316f337 DF |
642 | |
643 | DRM_ERROR("too many retries, giving up\n"); | |
644 | return -EREMOTEIO; | |
a4fc5ed6 KP |
645 | } |
646 | ||
0b5c541b | 647 | static void ironlake_edp_panel_vdd_on(struct intel_dp *intel_dp); |
bd943159 | 648 | static void ironlake_edp_panel_vdd_off(struct intel_dp *intel_dp, bool sync); |
0b5c541b | 649 | |
a4fc5ed6 | 650 | static int |
ea5b213a | 651 | intel_dp_i2c_init(struct intel_dp *intel_dp, |
55f78c43 | 652 | struct intel_connector *intel_connector, const char *name) |
a4fc5ed6 | 653 | { |
0b5c541b KP |
654 | int ret; |
655 | ||
d54e9d28 | 656 | DRM_DEBUG_KMS("i2c_init %s\n", name); |
ea5b213a CW |
657 | intel_dp->algo.running = false; |
658 | intel_dp->algo.address = 0; | |
659 | intel_dp->algo.aux_ch = intel_dp_i2c_aux_ch; | |
660 | ||
0206e353 | 661 | memset(&intel_dp->adapter, '\0', sizeof(intel_dp->adapter)); |
ea5b213a CW |
662 | intel_dp->adapter.owner = THIS_MODULE; |
663 | intel_dp->adapter.class = I2C_CLASS_DDC; | |
0206e353 | 664 | strncpy(intel_dp->adapter.name, name, sizeof(intel_dp->adapter.name) - 1); |
ea5b213a CW |
665 | intel_dp->adapter.name[sizeof(intel_dp->adapter.name) - 1] = '\0'; |
666 | intel_dp->adapter.algo_data = &intel_dp->algo; | |
667 | intel_dp->adapter.dev.parent = &intel_connector->base.kdev; | |
668 | ||
0b5c541b KP |
669 | ironlake_edp_panel_vdd_on(intel_dp); |
670 | ret = i2c_dp_aux_add_bus(&intel_dp->adapter); | |
bd943159 | 671 | ironlake_edp_panel_vdd_off(intel_dp, false); |
0b5c541b | 672 | return ret; |
a4fc5ed6 KP |
673 | } |
674 | ||
675 | static bool | |
e811f5ae LP |
676 | intel_dp_mode_fixup(struct drm_encoder *encoder, |
677 | const struct drm_display_mode *mode, | |
a4fc5ed6 KP |
678 | struct drm_display_mode *adjusted_mode) |
679 | { | |
0d3a1bee | 680 | struct drm_device *dev = encoder->dev; |
ea5b213a | 681 | struct intel_dp *intel_dp = enc_to_intel_dp(encoder); |
a4fc5ed6 | 682 | int lane_count, clock; |
ea5b213a CW |
683 | int max_lane_count = intel_dp_max_lane_count(intel_dp); |
684 | int max_clock = intel_dp_max_link_bw(intel_dp) == DP_LINK_BW_2_7 ? 1 : 0; | |
083f9560 | 685 | int bpp, mode_rate; |
a4fc5ed6 KP |
686 | static int bws[2] = { DP_LINK_BW_1_62, DP_LINK_BW_2_7 }; |
687 | ||
d15456de KP |
688 | if (is_edp(intel_dp) && intel_dp->panel_fixed_mode) { |
689 | intel_fixed_panel_mode(intel_dp->panel_fixed_mode, adjusted_mode); | |
1d8e1c75 CW |
690 | intel_pch_panel_fitting(dev, DRM_MODE_SCALE_FULLSCREEN, |
691 | mode, adjusted_mode); | |
0d3a1bee ZY |
692 | } |
693 | ||
cb1793ce | 694 | if (adjusted_mode->flags & DRM_MODE_FLAG_DBLCLK) |
0af78a2b DV |
695 | return false; |
696 | ||
083f9560 DV |
697 | DRM_DEBUG_KMS("DP link computation with max lane count %i " |
698 | "max bw %02x pixel clock %iKHz\n", | |
71244653 | 699 | max_lane_count, bws[max_clock], adjusted_mode->clock); |
083f9560 | 700 | |
cb1793ce | 701 | if (!intel_dp_adjust_dithering(intel_dp, adjusted_mode, true)) |
c4867936 DV |
702 | return false; |
703 | ||
704 | bpp = adjusted_mode->private_flags & INTEL_MODE_DP_FORCE_6BPC ? 18 : 24; | |
71244653 | 705 | mode_rate = intel_dp_link_required(adjusted_mode->clock, bpp); |
c4867936 | 706 | |
2514bc51 JB |
707 | for (clock = 0; clock <= max_clock; clock++) { |
708 | for (lane_count = 1; lane_count <= max_lane_count; lane_count <<= 1) { | |
fe27d53e | 709 | int link_avail = intel_dp_max_data_rate(intel_dp_link_clock(bws[clock]), lane_count); |
a4fc5ed6 | 710 | |
083f9560 | 711 | if (mode_rate <= link_avail) { |
ea5b213a CW |
712 | intel_dp->link_bw = bws[clock]; |
713 | intel_dp->lane_count = lane_count; | |
714 | adjusted_mode->clock = intel_dp_link_clock(intel_dp->link_bw); | |
083f9560 DV |
715 | DRM_DEBUG_KMS("DP link bw %02x lane " |
716 | "count %d clock %d bpp %d\n", | |
ea5b213a | 717 | intel_dp->link_bw, intel_dp->lane_count, |
083f9560 DV |
718 | adjusted_mode->clock, bpp); |
719 | DRM_DEBUG_KMS("DP link bw required %i available %i\n", | |
720 | mode_rate, link_avail); | |
a4fc5ed6 KP |
721 | return true; |
722 | } | |
723 | } | |
724 | } | |
fe27d53e | 725 | |
a4fc5ed6 KP |
726 | return false; |
727 | } | |
728 | ||
729 | struct intel_dp_m_n { | |
730 | uint32_t tu; | |
731 | uint32_t gmch_m; | |
732 | uint32_t gmch_n; | |
733 | uint32_t link_m; | |
734 | uint32_t link_n; | |
735 | }; | |
736 | ||
737 | static void | |
738 | intel_reduce_ratio(uint32_t *num, uint32_t *den) | |
739 | { | |
740 | while (*num > 0xffffff || *den > 0xffffff) { | |
741 | *num >>= 1; | |
742 | *den >>= 1; | |
743 | } | |
744 | } | |
745 | ||
746 | static void | |
36e83a18 | 747 | intel_dp_compute_m_n(int bpp, |
a4fc5ed6 KP |
748 | int nlanes, |
749 | int pixel_clock, | |
750 | int link_clock, | |
751 | struct intel_dp_m_n *m_n) | |
752 | { | |
753 | m_n->tu = 64; | |
36e83a18 | 754 | m_n->gmch_m = (pixel_clock * bpp) >> 3; |
a4fc5ed6 KP |
755 | m_n->gmch_n = link_clock * nlanes; |
756 | intel_reduce_ratio(&m_n->gmch_m, &m_n->gmch_n); | |
757 | m_n->link_m = pixel_clock; | |
758 | m_n->link_n = link_clock; | |
759 | intel_reduce_ratio(&m_n->link_m, &m_n->link_n); | |
760 | } | |
761 | ||
762 | void | |
763 | intel_dp_set_m_n(struct drm_crtc *crtc, struct drm_display_mode *mode, | |
764 | struct drm_display_mode *adjusted_mode) | |
765 | { | |
766 | struct drm_device *dev = crtc->dev; | |
6c2b7c12 | 767 | struct intel_encoder *encoder; |
a4fc5ed6 KP |
768 | struct drm_i915_private *dev_priv = dev->dev_private; |
769 | struct intel_crtc *intel_crtc = to_intel_crtc(crtc); | |
858fa035 | 770 | int lane_count = 4; |
a4fc5ed6 | 771 | struct intel_dp_m_n m_n; |
9db4a9c7 | 772 | int pipe = intel_crtc->pipe; |
a4fc5ed6 KP |
773 | |
774 | /* | |
21d40d37 | 775 | * Find the lane count in the intel_encoder private |
a4fc5ed6 | 776 | */ |
6c2b7c12 DV |
777 | for_each_encoder_on_crtc(dev, crtc, encoder) { |
778 | struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base); | |
a4fc5ed6 | 779 | |
9a10f401 KP |
780 | if (intel_dp->base.type == INTEL_OUTPUT_DISPLAYPORT || |
781 | intel_dp->base.type == INTEL_OUTPUT_EDP) | |
782 | { | |
ea5b213a | 783 | lane_count = intel_dp->lane_count; |
51190667 | 784 | break; |
a4fc5ed6 KP |
785 | } |
786 | } | |
787 | ||
788 | /* | |
789 | * Compute the GMCH and Link ratios. The '3' here is | |
790 | * the number of bytes_per_pixel post-LUT, which we always | |
791 | * set up for 8-bits of R/G/B, or 3 bytes total. | |
792 | */ | |
858fa035 | 793 | intel_dp_compute_m_n(intel_crtc->bpp, lane_count, |
a4fc5ed6 KP |
794 | mode->clock, adjusted_mode->clock, &m_n); |
795 | ||
c619eed4 | 796 | if (HAS_PCH_SPLIT(dev)) { |
9db4a9c7 JB |
797 | I915_WRITE(TRANSDATA_M1(pipe), |
798 | ((m_n.tu - 1) << PIPE_GMCH_DATA_M_TU_SIZE_SHIFT) | | |
799 | m_n.gmch_m); | |
800 | I915_WRITE(TRANSDATA_N1(pipe), m_n.gmch_n); | |
801 | I915_WRITE(TRANSDPLINK_M1(pipe), m_n.link_m); | |
802 | I915_WRITE(TRANSDPLINK_N1(pipe), m_n.link_n); | |
74a4dd2e VP |
803 | } else if (IS_VALLEYVIEW(dev)) { |
804 | I915_WRITE(PIPE_DATA_M1(pipe), TU_SIZE(m_n.tu) | m_n.gmch_m); | |
805 | I915_WRITE(PIPE_DATA_N1(pipe), m_n.gmch_n); | |
806 | I915_WRITE(PIPE_LINK_M1(pipe), m_n.link_m); | |
807 | I915_WRITE(PIPE_LINK_N1(pipe), m_n.link_n); | |
a4fc5ed6 | 808 | } else { |
9db4a9c7 JB |
809 | I915_WRITE(PIPE_GMCH_DATA_M(pipe), |
810 | ((m_n.tu - 1) << PIPE_GMCH_DATA_M_TU_SIZE_SHIFT) | | |
811 | m_n.gmch_m); | |
812 | I915_WRITE(PIPE_GMCH_DATA_N(pipe), m_n.gmch_n); | |
813 | I915_WRITE(PIPE_DP_LINK_M(pipe), m_n.link_m); | |
814 | I915_WRITE(PIPE_DP_LINK_N(pipe), m_n.link_n); | |
a4fc5ed6 KP |
815 | } |
816 | } | |
817 | ||
818 | static void | |
819 | intel_dp_mode_set(struct drm_encoder *encoder, struct drm_display_mode *mode, | |
820 | struct drm_display_mode *adjusted_mode) | |
821 | { | |
e3421a18 | 822 | struct drm_device *dev = encoder->dev; |
417e822d | 823 | struct drm_i915_private *dev_priv = dev->dev_private; |
ea5b213a | 824 | struct intel_dp *intel_dp = enc_to_intel_dp(encoder); |
4ef69c7a | 825 | struct drm_crtc *crtc = intel_dp->base.base.crtc; |
a4fc5ed6 KP |
826 | struct intel_crtc *intel_crtc = to_intel_crtc(crtc); |
827 | ||
417e822d | 828 | /* |
1a2eb460 | 829 | * There are four kinds of DP registers: |
417e822d KP |
830 | * |
831 | * IBX PCH | |
1a2eb460 KP |
832 | * SNB CPU |
833 | * IVB CPU | |
417e822d KP |
834 | * CPT PCH |
835 | * | |
836 | * IBX PCH and CPU are the same for almost everything, | |
837 | * except that the CPU DP PLL is configured in this | |
838 | * register | |
839 | * | |
840 | * CPT PCH is quite different, having many bits moved | |
841 | * to the TRANS_DP_CTL register instead. That | |
842 | * configuration happens (oddly) in ironlake_pch_enable | |
843 | */ | |
9c9e7927 | 844 | |
417e822d KP |
845 | /* Preserve the BIOS-computed detected bit. This is |
846 | * supposed to be read-only. | |
847 | */ | |
848 | intel_dp->DP = I915_READ(intel_dp->output_reg) & DP_DETECTED; | |
a4fc5ed6 | 849 | |
417e822d | 850 | /* Handle DP bits in common between all three register formats */ |
417e822d | 851 | intel_dp->DP |= DP_VOLTAGE_0_4 | DP_PRE_EMPHASIS_0; |
a4fc5ed6 | 852 | |
ea5b213a | 853 | switch (intel_dp->lane_count) { |
a4fc5ed6 | 854 | case 1: |
ea5b213a | 855 | intel_dp->DP |= DP_PORT_WIDTH_1; |
a4fc5ed6 KP |
856 | break; |
857 | case 2: | |
ea5b213a | 858 | intel_dp->DP |= DP_PORT_WIDTH_2; |
a4fc5ed6 KP |
859 | break; |
860 | case 4: | |
ea5b213a | 861 | intel_dp->DP |= DP_PORT_WIDTH_4; |
a4fc5ed6 KP |
862 | break; |
863 | } | |
e0dac65e WF |
864 | if (intel_dp->has_audio) { |
865 | DRM_DEBUG_DRIVER("Enabling DP audio on pipe %c\n", | |
866 | pipe_name(intel_crtc->pipe)); | |
ea5b213a | 867 | intel_dp->DP |= DP_AUDIO_OUTPUT_ENABLE; |
e0dac65e WF |
868 | intel_write_eld(encoder, adjusted_mode); |
869 | } | |
ea5b213a CW |
870 | memset(intel_dp->link_configuration, 0, DP_LINK_CONFIGURATION_SIZE); |
871 | intel_dp->link_configuration[0] = intel_dp->link_bw; | |
872 | intel_dp->link_configuration[1] = intel_dp->lane_count; | |
a2cab1b2 | 873 | intel_dp->link_configuration[8] = DP_SET_ANSI_8B10B; |
a4fc5ed6 | 874 | /* |
9962c925 | 875 | * Check for DPCD version > 1.1 and enhanced framing support |
a4fc5ed6 | 876 | */ |
7183dc29 JB |
877 | if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11 && |
878 | (intel_dp->dpcd[DP_MAX_LANE_COUNT] & DP_ENHANCED_FRAME_CAP)) { | |
ea5b213a | 879 | intel_dp->link_configuration[1] |= DP_LANE_COUNT_ENHANCED_FRAME_EN; |
a4fc5ed6 KP |
880 | } |
881 | ||
417e822d | 882 | /* Split out the IBX/CPU vs CPT settings */ |
32f9d658 | 883 | |
19c03924 | 884 | if (is_cpu_edp(intel_dp) && IS_GEN7(dev) && !IS_VALLEYVIEW(dev)) { |
1a2eb460 KP |
885 | if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC) |
886 | intel_dp->DP |= DP_SYNC_HS_HIGH; | |
887 | if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC) | |
888 | intel_dp->DP |= DP_SYNC_VS_HIGH; | |
889 | intel_dp->DP |= DP_LINK_TRAIN_OFF_CPT; | |
890 | ||
891 | if (intel_dp->link_configuration[1] & DP_LANE_COUNT_ENHANCED_FRAME_EN) | |
892 | intel_dp->DP |= DP_ENHANCED_FRAMING; | |
893 | ||
894 | intel_dp->DP |= intel_crtc->pipe << 29; | |
895 | ||
896 | /* don't miss out required setting for eDP */ | |
1a2eb460 KP |
897 | if (adjusted_mode->clock < 200000) |
898 | intel_dp->DP |= DP_PLL_FREQ_160MHZ; | |
899 | else | |
900 | intel_dp->DP |= DP_PLL_FREQ_270MHZ; | |
901 | } else if (!HAS_PCH_CPT(dev) || is_cpu_edp(intel_dp)) { | |
417e822d KP |
902 | intel_dp->DP |= intel_dp->color_range; |
903 | ||
904 | if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC) | |
905 | intel_dp->DP |= DP_SYNC_HS_HIGH; | |
906 | if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC) | |
907 | intel_dp->DP |= DP_SYNC_VS_HIGH; | |
908 | intel_dp->DP |= DP_LINK_TRAIN_OFF; | |
909 | ||
910 | if (intel_dp->link_configuration[1] & DP_LANE_COUNT_ENHANCED_FRAME_EN) | |
911 | intel_dp->DP |= DP_ENHANCED_FRAMING; | |
912 | ||
913 | if (intel_crtc->pipe == 1) | |
914 | intel_dp->DP |= DP_PIPEB_SELECT; | |
915 | ||
916 | if (is_cpu_edp(intel_dp)) { | |
917 | /* don't miss out required setting for eDP */ | |
417e822d KP |
918 | if (adjusted_mode->clock < 200000) |
919 | intel_dp->DP |= DP_PLL_FREQ_160MHZ; | |
920 | else | |
921 | intel_dp->DP |= DP_PLL_FREQ_270MHZ; | |
922 | } | |
923 | } else { | |
924 | intel_dp->DP |= DP_LINK_TRAIN_OFF_CPT; | |
32f9d658 | 925 | } |
a4fc5ed6 KP |
926 | } |
927 | ||
99ea7127 KP |
928 | #define IDLE_ON_MASK (PP_ON | 0 | PP_SEQUENCE_MASK | 0 | PP_SEQUENCE_STATE_MASK) |
929 | #define IDLE_ON_VALUE (PP_ON | 0 | PP_SEQUENCE_NONE | 0 | PP_SEQUENCE_STATE_ON_IDLE) | |
930 | ||
931 | #define IDLE_OFF_MASK (PP_ON | 0 | PP_SEQUENCE_MASK | 0 | PP_SEQUENCE_STATE_MASK) | |
932 | #define IDLE_OFF_VALUE (0 | 0 | PP_SEQUENCE_NONE | 0 | PP_SEQUENCE_STATE_OFF_IDLE) | |
933 | ||
934 | #define IDLE_CYCLE_MASK (PP_ON | 0 | PP_SEQUENCE_MASK | PP_CYCLE_DELAY_ACTIVE | PP_SEQUENCE_STATE_MASK) | |
935 | #define IDLE_CYCLE_VALUE (0 | 0 | PP_SEQUENCE_NONE | 0 | PP_SEQUENCE_STATE_OFF_IDLE) | |
936 | ||
937 | static void ironlake_wait_panel_status(struct intel_dp *intel_dp, | |
938 | u32 mask, | |
939 | u32 value) | |
bd943159 | 940 | { |
99ea7127 KP |
941 | struct drm_device *dev = intel_dp->base.base.dev; |
942 | struct drm_i915_private *dev_priv = dev->dev_private; | |
32ce697c | 943 | |
99ea7127 KP |
944 | DRM_DEBUG_KMS("mask %08x value %08x status %08x control %08x\n", |
945 | mask, value, | |
946 | I915_READ(PCH_PP_STATUS), | |
947 | I915_READ(PCH_PP_CONTROL)); | |
32ce697c | 948 | |
99ea7127 KP |
949 | if (_wait_for((I915_READ(PCH_PP_STATUS) & mask) == value, 5000, 10)) { |
950 | DRM_ERROR("Panel status timeout: status %08x control %08x\n", | |
951 | I915_READ(PCH_PP_STATUS), | |
952 | I915_READ(PCH_PP_CONTROL)); | |
32ce697c | 953 | } |
99ea7127 | 954 | } |
32ce697c | 955 | |
99ea7127 KP |
956 | static void ironlake_wait_panel_on(struct intel_dp *intel_dp) |
957 | { | |
958 | DRM_DEBUG_KMS("Wait for panel power on\n"); | |
959 | ironlake_wait_panel_status(intel_dp, IDLE_ON_MASK, IDLE_ON_VALUE); | |
bd943159 KP |
960 | } |
961 | ||
99ea7127 KP |
962 | static void ironlake_wait_panel_off(struct intel_dp *intel_dp) |
963 | { | |
964 | DRM_DEBUG_KMS("Wait for panel power off time\n"); | |
965 | ironlake_wait_panel_status(intel_dp, IDLE_OFF_MASK, IDLE_OFF_VALUE); | |
966 | } | |
967 | ||
968 | static void ironlake_wait_panel_power_cycle(struct intel_dp *intel_dp) | |
969 | { | |
970 | DRM_DEBUG_KMS("Wait for panel power cycle\n"); | |
971 | ironlake_wait_panel_status(intel_dp, IDLE_CYCLE_MASK, IDLE_CYCLE_VALUE); | |
972 | } | |
973 | ||
974 | ||
832dd3c1 KP |
975 | /* Read the current pp_control value, unlocking the register if it |
976 | * is locked | |
977 | */ | |
978 | ||
979 | static u32 ironlake_get_pp_control(struct drm_i915_private *dev_priv) | |
980 | { | |
981 | u32 control = I915_READ(PCH_PP_CONTROL); | |
982 | ||
983 | control &= ~PANEL_UNLOCK_MASK; | |
984 | control |= PANEL_UNLOCK_REGS; | |
985 | return control; | |
bd943159 KP |
986 | } |
987 | ||
5d613501 JB |
988 | static void ironlake_edp_panel_vdd_on(struct intel_dp *intel_dp) |
989 | { | |
990 | struct drm_device *dev = intel_dp->base.base.dev; | |
991 | struct drm_i915_private *dev_priv = dev->dev_private; | |
992 | u32 pp; | |
993 | ||
97af61f5 KP |
994 | if (!is_edp(intel_dp)) |
995 | return; | |
f01eca2e | 996 | DRM_DEBUG_KMS("Turn eDP VDD on\n"); |
5d613501 | 997 | |
bd943159 KP |
998 | WARN(intel_dp->want_panel_vdd, |
999 | "eDP VDD already requested on\n"); | |
1000 | ||
1001 | intel_dp->want_panel_vdd = true; | |
99ea7127 | 1002 | |
bd943159 KP |
1003 | if (ironlake_edp_have_panel_vdd(intel_dp)) { |
1004 | DRM_DEBUG_KMS("eDP VDD already on\n"); | |
1005 | return; | |
1006 | } | |
1007 | ||
99ea7127 KP |
1008 | if (!ironlake_edp_have_panel_power(intel_dp)) |
1009 | ironlake_wait_panel_power_cycle(intel_dp); | |
1010 | ||
832dd3c1 | 1011 | pp = ironlake_get_pp_control(dev_priv); |
5d613501 JB |
1012 | pp |= EDP_FORCE_VDD; |
1013 | I915_WRITE(PCH_PP_CONTROL, pp); | |
1014 | POSTING_READ(PCH_PP_CONTROL); | |
f01eca2e KP |
1015 | DRM_DEBUG_KMS("PCH_PP_STATUS: 0x%08x PCH_PP_CONTROL: 0x%08x\n", |
1016 | I915_READ(PCH_PP_STATUS), I915_READ(PCH_PP_CONTROL)); | |
ebf33b18 KP |
1017 | |
1018 | /* | |
1019 | * If the panel wasn't on, delay before accessing aux channel | |
1020 | */ | |
1021 | if (!ironlake_edp_have_panel_power(intel_dp)) { | |
bd943159 | 1022 | DRM_DEBUG_KMS("eDP was not running\n"); |
f01eca2e | 1023 | msleep(intel_dp->panel_power_up_delay); |
f01eca2e | 1024 | } |
5d613501 JB |
1025 | } |
1026 | ||
bd943159 | 1027 | static void ironlake_panel_vdd_off_sync(struct intel_dp *intel_dp) |
5d613501 JB |
1028 | { |
1029 | struct drm_device *dev = intel_dp->base.base.dev; | |
1030 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1031 | u32 pp; | |
1032 | ||
bd943159 | 1033 | if (!intel_dp->want_panel_vdd && ironlake_edp_have_panel_vdd(intel_dp)) { |
832dd3c1 | 1034 | pp = ironlake_get_pp_control(dev_priv); |
bd943159 KP |
1035 | pp &= ~EDP_FORCE_VDD; |
1036 | I915_WRITE(PCH_PP_CONTROL, pp); | |
1037 | POSTING_READ(PCH_PP_CONTROL); | |
1038 | ||
1039 | /* Make sure sequencer is idle before allowing subsequent activity */ | |
1040 | DRM_DEBUG_KMS("PCH_PP_STATUS: 0x%08x PCH_PP_CONTROL: 0x%08x\n", | |
1041 | I915_READ(PCH_PP_STATUS), I915_READ(PCH_PP_CONTROL)); | |
99ea7127 KP |
1042 | |
1043 | msleep(intel_dp->panel_power_down_delay); | |
bd943159 KP |
1044 | } |
1045 | } | |
5d613501 | 1046 | |
bd943159 KP |
1047 | static void ironlake_panel_vdd_work(struct work_struct *__work) |
1048 | { | |
1049 | struct intel_dp *intel_dp = container_of(to_delayed_work(__work), | |
1050 | struct intel_dp, panel_vdd_work); | |
1051 | struct drm_device *dev = intel_dp->base.base.dev; | |
1052 | ||
627f7675 | 1053 | mutex_lock(&dev->mode_config.mutex); |
bd943159 | 1054 | ironlake_panel_vdd_off_sync(intel_dp); |
627f7675 | 1055 | mutex_unlock(&dev->mode_config.mutex); |
bd943159 KP |
1056 | } |
1057 | ||
1058 | static void ironlake_edp_panel_vdd_off(struct intel_dp *intel_dp, bool sync) | |
1059 | { | |
97af61f5 KP |
1060 | if (!is_edp(intel_dp)) |
1061 | return; | |
5d613501 | 1062 | |
bd943159 KP |
1063 | DRM_DEBUG_KMS("Turn eDP VDD off %d\n", intel_dp->want_panel_vdd); |
1064 | WARN(!intel_dp->want_panel_vdd, "eDP VDD not forced on"); | |
f2e8b18a | 1065 | |
bd943159 KP |
1066 | intel_dp->want_panel_vdd = false; |
1067 | ||
1068 | if (sync) { | |
1069 | ironlake_panel_vdd_off_sync(intel_dp); | |
1070 | } else { | |
1071 | /* | |
1072 | * Queue the timer to fire a long | |
1073 | * time from now (relative to the power down delay) | |
1074 | * to keep the panel power up across a sequence of operations | |
1075 | */ | |
1076 | schedule_delayed_work(&intel_dp->panel_vdd_work, | |
1077 | msecs_to_jiffies(intel_dp->panel_power_cycle_delay * 5)); | |
1078 | } | |
5d613501 JB |
1079 | } |
1080 | ||
86a3073e | 1081 | static void ironlake_edp_panel_on(struct intel_dp *intel_dp) |
9934c132 | 1082 | { |
01cb9ea6 | 1083 | struct drm_device *dev = intel_dp->base.base.dev; |
9934c132 | 1084 | struct drm_i915_private *dev_priv = dev->dev_private; |
99ea7127 | 1085 | u32 pp; |
9934c132 | 1086 | |
97af61f5 | 1087 | if (!is_edp(intel_dp)) |
bd943159 | 1088 | return; |
99ea7127 KP |
1089 | |
1090 | DRM_DEBUG_KMS("Turn eDP power on\n"); | |
1091 | ||
1092 | if (ironlake_edp_have_panel_power(intel_dp)) { | |
1093 | DRM_DEBUG_KMS("eDP power already on\n"); | |
7d639f35 | 1094 | return; |
99ea7127 | 1095 | } |
9934c132 | 1096 | |
99ea7127 | 1097 | ironlake_wait_panel_power_cycle(intel_dp); |
37c6c9b0 | 1098 | |
99ea7127 | 1099 | pp = ironlake_get_pp_control(dev_priv); |
05ce1a49 KP |
1100 | if (IS_GEN5(dev)) { |
1101 | /* ILK workaround: disable reset around power sequence */ | |
1102 | pp &= ~PANEL_POWER_RESET; | |
1103 | I915_WRITE(PCH_PP_CONTROL, pp); | |
1104 | POSTING_READ(PCH_PP_CONTROL); | |
1105 | } | |
37c6c9b0 | 1106 | |
1c0ae80a | 1107 | pp |= POWER_TARGET_ON; |
99ea7127 KP |
1108 | if (!IS_GEN5(dev)) |
1109 | pp |= PANEL_POWER_RESET; | |
1110 | ||
9934c132 | 1111 | I915_WRITE(PCH_PP_CONTROL, pp); |
01cb9ea6 | 1112 | POSTING_READ(PCH_PP_CONTROL); |
9934c132 | 1113 | |
99ea7127 | 1114 | ironlake_wait_panel_on(intel_dp); |
9934c132 | 1115 | |
05ce1a49 KP |
1116 | if (IS_GEN5(dev)) { |
1117 | pp |= PANEL_POWER_RESET; /* restore panel reset bit */ | |
1118 | I915_WRITE(PCH_PP_CONTROL, pp); | |
1119 | POSTING_READ(PCH_PP_CONTROL); | |
1120 | } | |
9934c132 JB |
1121 | } |
1122 | ||
99ea7127 | 1123 | static void ironlake_edp_panel_off(struct intel_dp *intel_dp) |
9934c132 | 1124 | { |
99ea7127 | 1125 | struct drm_device *dev = intel_dp->base.base.dev; |
9934c132 | 1126 | struct drm_i915_private *dev_priv = dev->dev_private; |
99ea7127 | 1127 | u32 pp; |
9934c132 | 1128 | |
97af61f5 KP |
1129 | if (!is_edp(intel_dp)) |
1130 | return; | |
37c6c9b0 | 1131 | |
99ea7127 | 1132 | DRM_DEBUG_KMS("Turn eDP power off\n"); |
37c6c9b0 | 1133 | |
6cb49835 | 1134 | WARN(!intel_dp->want_panel_vdd, "Need VDD to turn off panel\n"); |
37c6c9b0 | 1135 | |
99ea7127 | 1136 | pp = ironlake_get_pp_control(dev_priv); |
35a38556 DV |
1137 | /* We need to switch off panel power _and_ force vdd, for otherwise some |
1138 | * panels get very unhappy and cease to work. */ | |
1139 | pp &= ~(POWER_TARGET_ON | EDP_FORCE_VDD | PANEL_POWER_RESET | EDP_BLC_ENABLE); | |
99ea7127 KP |
1140 | I915_WRITE(PCH_PP_CONTROL, pp); |
1141 | POSTING_READ(PCH_PP_CONTROL); | |
9934c132 | 1142 | |
35a38556 DV |
1143 | intel_dp->want_panel_vdd = false; |
1144 | ||
99ea7127 | 1145 | ironlake_wait_panel_off(intel_dp); |
9934c132 JB |
1146 | } |
1147 | ||
86a3073e | 1148 | static void ironlake_edp_backlight_on(struct intel_dp *intel_dp) |
32f9d658 | 1149 | { |
f01eca2e | 1150 | struct drm_device *dev = intel_dp->base.base.dev; |
32f9d658 ZW |
1151 | struct drm_i915_private *dev_priv = dev->dev_private; |
1152 | u32 pp; | |
1153 | ||
f01eca2e KP |
1154 | if (!is_edp(intel_dp)) |
1155 | return; | |
1156 | ||
28c97730 | 1157 | DRM_DEBUG_KMS("\n"); |
01cb9ea6 JB |
1158 | /* |
1159 | * If we enable the backlight right away following a panel power | |
1160 | * on, we may see slight flicker as the panel syncs with the eDP | |
1161 | * link. So delay a bit to make sure the image is solid before | |
1162 | * allowing it to appear. | |
1163 | */ | |
f01eca2e | 1164 | msleep(intel_dp->backlight_on_delay); |
832dd3c1 | 1165 | pp = ironlake_get_pp_control(dev_priv); |
32f9d658 ZW |
1166 | pp |= EDP_BLC_ENABLE; |
1167 | I915_WRITE(PCH_PP_CONTROL, pp); | |
f01eca2e | 1168 | POSTING_READ(PCH_PP_CONTROL); |
32f9d658 ZW |
1169 | } |
1170 | ||
86a3073e | 1171 | static void ironlake_edp_backlight_off(struct intel_dp *intel_dp) |
32f9d658 | 1172 | { |
f01eca2e | 1173 | struct drm_device *dev = intel_dp->base.base.dev; |
32f9d658 ZW |
1174 | struct drm_i915_private *dev_priv = dev->dev_private; |
1175 | u32 pp; | |
1176 | ||
f01eca2e KP |
1177 | if (!is_edp(intel_dp)) |
1178 | return; | |
1179 | ||
28c97730 | 1180 | DRM_DEBUG_KMS("\n"); |
832dd3c1 | 1181 | pp = ironlake_get_pp_control(dev_priv); |
32f9d658 ZW |
1182 | pp &= ~EDP_BLC_ENABLE; |
1183 | I915_WRITE(PCH_PP_CONTROL, pp); | |
f01eca2e KP |
1184 | POSTING_READ(PCH_PP_CONTROL); |
1185 | msleep(intel_dp->backlight_off_delay); | |
32f9d658 | 1186 | } |
a4fc5ed6 | 1187 | |
2bd2ad64 | 1188 | static void ironlake_edp_pll_on(struct intel_dp *intel_dp) |
d240f20f | 1189 | { |
2bd2ad64 DV |
1190 | struct drm_device *dev = intel_dp->base.base.dev; |
1191 | struct drm_crtc *crtc = intel_dp->base.base.crtc; | |
d240f20f JB |
1192 | struct drm_i915_private *dev_priv = dev->dev_private; |
1193 | u32 dpa_ctl; | |
1194 | ||
2bd2ad64 DV |
1195 | assert_pipe_disabled(dev_priv, |
1196 | to_intel_crtc(crtc)->pipe); | |
1197 | ||
d240f20f JB |
1198 | DRM_DEBUG_KMS("\n"); |
1199 | dpa_ctl = I915_READ(DP_A); | |
0767935e DV |
1200 | WARN(dpa_ctl & DP_PLL_ENABLE, "dp pll on, should be off\n"); |
1201 | WARN(dpa_ctl & DP_PORT_EN, "dp port still on, should be off\n"); | |
1202 | ||
1203 | /* We don't adjust intel_dp->DP while tearing down the link, to | |
1204 | * facilitate link retraining (e.g. after hotplug). Hence clear all | |
1205 | * enable bits here to ensure that we don't enable too much. */ | |
1206 | intel_dp->DP &= ~(DP_PORT_EN | DP_AUDIO_OUTPUT_ENABLE); | |
1207 | intel_dp->DP |= DP_PLL_ENABLE; | |
1208 | I915_WRITE(DP_A, intel_dp->DP); | |
298b0b39 JB |
1209 | POSTING_READ(DP_A); |
1210 | udelay(200); | |
d240f20f JB |
1211 | } |
1212 | ||
2bd2ad64 | 1213 | static void ironlake_edp_pll_off(struct intel_dp *intel_dp) |
d240f20f | 1214 | { |
2bd2ad64 DV |
1215 | struct drm_device *dev = intel_dp->base.base.dev; |
1216 | struct drm_crtc *crtc = intel_dp->base.base.crtc; | |
d240f20f JB |
1217 | struct drm_i915_private *dev_priv = dev->dev_private; |
1218 | u32 dpa_ctl; | |
1219 | ||
2bd2ad64 DV |
1220 | assert_pipe_disabled(dev_priv, |
1221 | to_intel_crtc(crtc)->pipe); | |
1222 | ||
d240f20f | 1223 | dpa_ctl = I915_READ(DP_A); |
0767935e DV |
1224 | WARN((dpa_ctl & DP_PLL_ENABLE) == 0, |
1225 | "dp pll off, should be on\n"); | |
1226 | WARN(dpa_ctl & DP_PORT_EN, "dp port still on, should be off\n"); | |
1227 | ||
1228 | /* We can't rely on the value tracked for the DP register in | |
1229 | * intel_dp->DP because link_down must not change that (otherwise link | |
1230 | * re-training will fail. */ | |
298b0b39 | 1231 | dpa_ctl &= ~DP_PLL_ENABLE; |
d240f20f | 1232 | I915_WRITE(DP_A, dpa_ctl); |
1af5fa1b | 1233 | POSTING_READ(DP_A); |
d240f20f JB |
1234 | udelay(200); |
1235 | } | |
1236 | ||
c7ad3810 JB |
1237 | /* If the sink supports it, try to set the power state appropriately */ |
1238 | static void intel_dp_sink_dpms(struct intel_dp *intel_dp, int mode) | |
1239 | { | |
1240 | int ret, i; | |
1241 | ||
1242 | /* Should have a valid DPCD by this point */ | |
1243 | if (intel_dp->dpcd[DP_DPCD_REV] < 0x11) | |
1244 | return; | |
1245 | ||
1246 | if (mode != DRM_MODE_DPMS_ON) { | |
1247 | ret = intel_dp_aux_native_write_1(intel_dp, DP_SET_POWER, | |
1248 | DP_SET_POWER_D3); | |
1249 | if (ret != 1) | |
1250 | DRM_DEBUG_DRIVER("failed to write sink power state\n"); | |
1251 | } else { | |
1252 | /* | |
1253 | * When turning on, we need to retry for 1ms to give the sink | |
1254 | * time to wake up. | |
1255 | */ | |
1256 | for (i = 0; i < 3; i++) { | |
1257 | ret = intel_dp_aux_native_write_1(intel_dp, | |
1258 | DP_SET_POWER, | |
1259 | DP_SET_POWER_D0); | |
1260 | if (ret == 1) | |
1261 | break; | |
1262 | msleep(1); | |
1263 | } | |
1264 | } | |
1265 | } | |
1266 | ||
19d8fe15 DV |
1267 | static bool intel_dp_get_hw_state(struct intel_encoder *encoder, |
1268 | enum pipe *pipe) | |
d240f20f | 1269 | { |
19d8fe15 DV |
1270 | struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base); |
1271 | struct drm_device *dev = encoder->base.dev; | |
1272 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1273 | u32 tmp = I915_READ(intel_dp->output_reg); | |
1274 | ||
1275 | if (!(tmp & DP_PORT_EN)) | |
1276 | return false; | |
1277 | ||
1278 | if (is_cpu_edp(intel_dp) && IS_GEN7(dev)) { | |
1279 | *pipe = PORT_TO_PIPE_CPT(tmp); | |
1280 | } else if (!HAS_PCH_CPT(dev) || is_cpu_edp(intel_dp)) { | |
1281 | *pipe = PORT_TO_PIPE(tmp); | |
1282 | } else { | |
1283 | u32 trans_sel; | |
1284 | u32 trans_dp; | |
1285 | int i; | |
1286 | ||
1287 | switch (intel_dp->output_reg) { | |
1288 | case PCH_DP_B: | |
1289 | trans_sel = TRANS_DP_PORT_SEL_B; | |
1290 | break; | |
1291 | case PCH_DP_C: | |
1292 | trans_sel = TRANS_DP_PORT_SEL_C; | |
1293 | break; | |
1294 | case PCH_DP_D: | |
1295 | trans_sel = TRANS_DP_PORT_SEL_D; | |
1296 | break; | |
1297 | default: | |
1298 | return true; | |
1299 | } | |
1300 | ||
1301 | for_each_pipe(i) { | |
1302 | trans_dp = I915_READ(TRANS_DP_CTL(i)); | |
1303 | if ((trans_dp & TRANS_DP_PORT_SEL_MASK) == trans_sel) { | |
1304 | *pipe = i; | |
1305 | return true; | |
1306 | } | |
1307 | } | |
1308 | } | |
1309 | ||
1310 | DRM_DEBUG_KMS("No pipe for dp port 0x%x found\n", intel_dp->output_reg); | |
d240f20f | 1311 | |
19d8fe15 DV |
1312 | return true; |
1313 | } | |
1314 | ||
e8cb4558 | 1315 | static void intel_disable_dp(struct intel_encoder *encoder) |
d240f20f | 1316 | { |
e8cb4558 | 1317 | struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base); |
6cb49835 DV |
1318 | |
1319 | /* Make sure the panel is off before trying to change the mode. But also | |
1320 | * ensure that we have vdd while we switch off the panel. */ | |
1321 | ironlake_edp_panel_vdd_on(intel_dp); | |
21264c63 | 1322 | ironlake_edp_backlight_off(intel_dp); |
c7ad3810 | 1323 | intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON); |
35a38556 | 1324 | ironlake_edp_panel_off(intel_dp); |
3739850b DV |
1325 | |
1326 | /* cpu edp my only be disable _after_ the cpu pipe/plane is disabled. */ | |
1327 | if (!is_cpu_edp(intel_dp)) | |
1328 | intel_dp_link_down(intel_dp); | |
d240f20f JB |
1329 | } |
1330 | ||
2bd2ad64 DV |
1331 | static void intel_post_disable_dp(struct intel_encoder *encoder) |
1332 | { | |
1333 | struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base); | |
1334 | ||
3739850b DV |
1335 | if (is_cpu_edp(intel_dp)) { |
1336 | intel_dp_link_down(intel_dp); | |
2bd2ad64 | 1337 | ironlake_edp_pll_off(intel_dp); |
3739850b | 1338 | } |
2bd2ad64 DV |
1339 | } |
1340 | ||
e8cb4558 | 1341 | static void intel_enable_dp(struct intel_encoder *encoder) |
d240f20f | 1342 | { |
e8cb4558 DV |
1343 | struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base); |
1344 | struct drm_device *dev = encoder->base.dev; | |
1345 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1346 | uint32_t dp_reg = I915_READ(intel_dp->output_reg); | |
5d613501 | 1347 | |
0c33d8d7 DV |
1348 | if (WARN_ON(dp_reg & DP_PORT_EN)) |
1349 | return; | |
1350 | ||
97af61f5 | 1351 | ironlake_edp_panel_vdd_on(intel_dp); |
f01eca2e | 1352 | intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON); |
0c33d8d7 DV |
1353 | intel_dp_start_link_train(intel_dp); |
1354 | ironlake_edp_panel_on(intel_dp); | |
1355 | ironlake_edp_panel_vdd_off(intel_dp, true); | |
1356 | intel_dp_complete_link_train(intel_dp); | |
f01eca2e | 1357 | ironlake_edp_backlight_on(intel_dp); |
d240f20f JB |
1358 | } |
1359 | ||
2bd2ad64 | 1360 | static void intel_pre_enable_dp(struct intel_encoder *encoder) |
a4fc5ed6 | 1361 | { |
2bd2ad64 | 1362 | struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base); |
0a91ca29 | 1363 | |
2bd2ad64 DV |
1364 | if (is_cpu_edp(intel_dp)) |
1365 | ironlake_edp_pll_on(intel_dp); | |
a4fc5ed6 KP |
1366 | } |
1367 | ||
1368 | /* | |
df0c237d JB |
1369 | * Native read with retry for link status and receiver capability reads for |
1370 | * cases where the sink may still be asleep. | |
a4fc5ed6 KP |
1371 | */ |
1372 | static bool | |
df0c237d JB |
1373 | intel_dp_aux_native_read_retry(struct intel_dp *intel_dp, uint16_t address, |
1374 | uint8_t *recv, int recv_bytes) | |
a4fc5ed6 | 1375 | { |
61da5fab JB |
1376 | int ret, i; |
1377 | ||
df0c237d JB |
1378 | /* |
1379 | * Sinks are *supposed* to come up within 1ms from an off state, | |
1380 | * but we're also supposed to retry 3 times per the spec. | |
1381 | */ | |
61da5fab | 1382 | for (i = 0; i < 3; i++) { |
df0c237d JB |
1383 | ret = intel_dp_aux_native_read(intel_dp, address, recv, |
1384 | recv_bytes); | |
1385 | if (ret == recv_bytes) | |
61da5fab JB |
1386 | return true; |
1387 | msleep(1); | |
1388 | } | |
a4fc5ed6 | 1389 | |
61da5fab | 1390 | return false; |
a4fc5ed6 KP |
1391 | } |
1392 | ||
1393 | /* | |
1394 | * Fetch AUX CH registers 0x202 - 0x207 which contain | |
1395 | * link status information | |
1396 | */ | |
1397 | static bool | |
93f62dad | 1398 | intel_dp_get_link_status(struct intel_dp *intel_dp, uint8_t link_status[DP_LINK_STATUS_SIZE]) |
a4fc5ed6 | 1399 | { |
df0c237d JB |
1400 | return intel_dp_aux_native_read_retry(intel_dp, |
1401 | DP_LANE0_1_STATUS, | |
93f62dad | 1402 | link_status, |
df0c237d | 1403 | DP_LINK_STATUS_SIZE); |
a4fc5ed6 KP |
1404 | } |
1405 | ||
1406 | static uint8_t | |
1407 | intel_dp_link_status(uint8_t link_status[DP_LINK_STATUS_SIZE], | |
1408 | int r) | |
1409 | { | |
1410 | return link_status[r - DP_LANE0_1_STATUS]; | |
1411 | } | |
1412 | ||
a4fc5ed6 | 1413 | static uint8_t |
93f62dad | 1414 | intel_get_adjust_request_voltage(uint8_t adjust_request[2], |
a4fc5ed6 KP |
1415 | int lane) |
1416 | { | |
a4fc5ed6 KP |
1417 | int s = ((lane & 1) ? |
1418 | DP_ADJUST_VOLTAGE_SWING_LANE1_SHIFT : | |
1419 | DP_ADJUST_VOLTAGE_SWING_LANE0_SHIFT); | |
93f62dad | 1420 | uint8_t l = adjust_request[lane>>1]; |
a4fc5ed6 KP |
1421 | |
1422 | return ((l >> s) & 3) << DP_TRAIN_VOLTAGE_SWING_SHIFT; | |
1423 | } | |
1424 | ||
1425 | static uint8_t | |
93f62dad | 1426 | intel_get_adjust_request_pre_emphasis(uint8_t adjust_request[2], |
a4fc5ed6 KP |
1427 | int lane) |
1428 | { | |
a4fc5ed6 KP |
1429 | int s = ((lane & 1) ? |
1430 | DP_ADJUST_PRE_EMPHASIS_LANE1_SHIFT : | |
1431 | DP_ADJUST_PRE_EMPHASIS_LANE0_SHIFT); | |
93f62dad | 1432 | uint8_t l = adjust_request[lane>>1]; |
a4fc5ed6 KP |
1433 | |
1434 | return ((l >> s) & 3) << DP_TRAIN_PRE_EMPHASIS_SHIFT; | |
1435 | } | |
1436 | ||
1437 | ||
1438 | #if 0 | |
1439 | static char *voltage_names[] = { | |
1440 | "0.4V", "0.6V", "0.8V", "1.2V" | |
1441 | }; | |
1442 | static char *pre_emph_names[] = { | |
1443 | "0dB", "3.5dB", "6dB", "9.5dB" | |
1444 | }; | |
1445 | static char *link_train_names[] = { | |
1446 | "pattern 1", "pattern 2", "idle", "off" | |
1447 | }; | |
1448 | #endif | |
1449 | ||
1450 | /* | |
1451 | * These are source-specific values; current Intel hardware supports | |
1452 | * a maximum voltage of 800mV and a maximum pre-emphasis of 6dB | |
1453 | */ | |
a4fc5ed6 KP |
1454 | |
1455 | static uint8_t | |
1a2eb460 | 1456 | intel_dp_voltage_max(struct intel_dp *intel_dp) |
a4fc5ed6 | 1457 | { |
1a2eb460 KP |
1458 | struct drm_device *dev = intel_dp->base.base.dev; |
1459 | ||
1460 | if (IS_GEN7(dev) && is_cpu_edp(intel_dp)) | |
1461 | return DP_TRAIN_VOLTAGE_SWING_800; | |
1462 | else if (HAS_PCH_CPT(dev) && !is_cpu_edp(intel_dp)) | |
1463 | return DP_TRAIN_VOLTAGE_SWING_1200; | |
1464 | else | |
1465 | return DP_TRAIN_VOLTAGE_SWING_800; | |
1466 | } | |
1467 | ||
1468 | static uint8_t | |
1469 | intel_dp_pre_emphasis_max(struct intel_dp *intel_dp, uint8_t voltage_swing) | |
1470 | { | |
1471 | struct drm_device *dev = intel_dp->base.base.dev; | |
1472 | ||
d6c0d722 PZ |
1473 | if (IS_HASWELL(dev)) { |
1474 | switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) { | |
1475 | case DP_TRAIN_VOLTAGE_SWING_400: | |
1476 | return DP_TRAIN_PRE_EMPHASIS_9_5; | |
1477 | case DP_TRAIN_VOLTAGE_SWING_600: | |
1478 | return DP_TRAIN_PRE_EMPHASIS_6; | |
1479 | case DP_TRAIN_VOLTAGE_SWING_800: | |
1480 | return DP_TRAIN_PRE_EMPHASIS_3_5; | |
1481 | case DP_TRAIN_VOLTAGE_SWING_1200: | |
1482 | default: | |
1483 | return DP_TRAIN_PRE_EMPHASIS_0; | |
1484 | } | |
1485 | } else if (IS_GEN7(dev) && is_cpu_edp(intel_dp) && !IS_VALLEYVIEW(dev)) { | |
1a2eb460 KP |
1486 | switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) { |
1487 | case DP_TRAIN_VOLTAGE_SWING_400: | |
1488 | return DP_TRAIN_PRE_EMPHASIS_6; | |
1489 | case DP_TRAIN_VOLTAGE_SWING_600: | |
1490 | case DP_TRAIN_VOLTAGE_SWING_800: | |
1491 | return DP_TRAIN_PRE_EMPHASIS_3_5; | |
1492 | default: | |
1493 | return DP_TRAIN_PRE_EMPHASIS_0; | |
1494 | } | |
1495 | } else { | |
1496 | switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) { | |
1497 | case DP_TRAIN_VOLTAGE_SWING_400: | |
1498 | return DP_TRAIN_PRE_EMPHASIS_6; | |
1499 | case DP_TRAIN_VOLTAGE_SWING_600: | |
1500 | return DP_TRAIN_PRE_EMPHASIS_6; | |
1501 | case DP_TRAIN_VOLTAGE_SWING_800: | |
1502 | return DP_TRAIN_PRE_EMPHASIS_3_5; | |
1503 | case DP_TRAIN_VOLTAGE_SWING_1200: | |
1504 | default: | |
1505 | return DP_TRAIN_PRE_EMPHASIS_0; | |
1506 | } | |
a4fc5ed6 KP |
1507 | } |
1508 | } | |
1509 | ||
1510 | static void | |
93f62dad | 1511 | intel_get_adjust_train(struct intel_dp *intel_dp, uint8_t link_status[DP_LINK_STATUS_SIZE]) |
a4fc5ed6 KP |
1512 | { |
1513 | uint8_t v = 0; | |
1514 | uint8_t p = 0; | |
1515 | int lane; | |
93f62dad | 1516 | uint8_t *adjust_request = link_status + (DP_ADJUST_REQUEST_LANE0_1 - DP_LANE0_1_STATUS); |
1a2eb460 KP |
1517 | uint8_t voltage_max; |
1518 | uint8_t preemph_max; | |
a4fc5ed6 | 1519 | |
33a34e4e | 1520 | for (lane = 0; lane < intel_dp->lane_count; lane++) { |
93f62dad KP |
1521 | uint8_t this_v = intel_get_adjust_request_voltage(adjust_request, lane); |
1522 | uint8_t this_p = intel_get_adjust_request_pre_emphasis(adjust_request, lane); | |
a4fc5ed6 KP |
1523 | |
1524 | if (this_v > v) | |
1525 | v = this_v; | |
1526 | if (this_p > p) | |
1527 | p = this_p; | |
1528 | } | |
1529 | ||
1a2eb460 | 1530 | voltage_max = intel_dp_voltage_max(intel_dp); |
417e822d KP |
1531 | if (v >= voltage_max) |
1532 | v = voltage_max | DP_TRAIN_MAX_SWING_REACHED; | |
a4fc5ed6 | 1533 | |
1a2eb460 KP |
1534 | preemph_max = intel_dp_pre_emphasis_max(intel_dp, v); |
1535 | if (p >= preemph_max) | |
1536 | p = preemph_max | DP_TRAIN_MAX_PRE_EMPHASIS_REACHED; | |
a4fc5ed6 KP |
1537 | |
1538 | for (lane = 0; lane < 4; lane++) | |
33a34e4e | 1539 | intel_dp->train_set[lane] = v | p; |
a4fc5ed6 KP |
1540 | } |
1541 | ||
1542 | static uint32_t | |
93f62dad | 1543 | intel_dp_signal_levels(uint8_t train_set) |
a4fc5ed6 | 1544 | { |
3cf2efb1 | 1545 | uint32_t signal_levels = 0; |
a4fc5ed6 | 1546 | |
3cf2efb1 | 1547 | switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) { |
a4fc5ed6 KP |
1548 | case DP_TRAIN_VOLTAGE_SWING_400: |
1549 | default: | |
1550 | signal_levels |= DP_VOLTAGE_0_4; | |
1551 | break; | |
1552 | case DP_TRAIN_VOLTAGE_SWING_600: | |
1553 | signal_levels |= DP_VOLTAGE_0_6; | |
1554 | break; | |
1555 | case DP_TRAIN_VOLTAGE_SWING_800: | |
1556 | signal_levels |= DP_VOLTAGE_0_8; | |
1557 | break; | |
1558 | case DP_TRAIN_VOLTAGE_SWING_1200: | |
1559 | signal_levels |= DP_VOLTAGE_1_2; | |
1560 | break; | |
1561 | } | |
3cf2efb1 | 1562 | switch (train_set & DP_TRAIN_PRE_EMPHASIS_MASK) { |
a4fc5ed6 KP |
1563 | case DP_TRAIN_PRE_EMPHASIS_0: |
1564 | default: | |
1565 | signal_levels |= DP_PRE_EMPHASIS_0; | |
1566 | break; | |
1567 | case DP_TRAIN_PRE_EMPHASIS_3_5: | |
1568 | signal_levels |= DP_PRE_EMPHASIS_3_5; | |
1569 | break; | |
1570 | case DP_TRAIN_PRE_EMPHASIS_6: | |
1571 | signal_levels |= DP_PRE_EMPHASIS_6; | |
1572 | break; | |
1573 | case DP_TRAIN_PRE_EMPHASIS_9_5: | |
1574 | signal_levels |= DP_PRE_EMPHASIS_9_5; | |
1575 | break; | |
1576 | } | |
1577 | return signal_levels; | |
1578 | } | |
1579 | ||
e3421a18 ZW |
1580 | /* Gen6's DP voltage swing and pre-emphasis control */ |
1581 | static uint32_t | |
1582 | intel_gen6_edp_signal_levels(uint8_t train_set) | |
1583 | { | |
3c5a62b5 YL |
1584 | int signal_levels = train_set & (DP_TRAIN_VOLTAGE_SWING_MASK | |
1585 | DP_TRAIN_PRE_EMPHASIS_MASK); | |
1586 | switch (signal_levels) { | |
e3421a18 | 1587 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_0: |
3c5a62b5 YL |
1588 | case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_0: |
1589 | return EDP_LINK_TRAIN_400_600MV_0DB_SNB_B; | |
1590 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_3_5: | |
1591 | return EDP_LINK_TRAIN_400MV_3_5DB_SNB_B; | |
e3421a18 | 1592 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_6: |
3c5a62b5 YL |
1593 | case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_6: |
1594 | return EDP_LINK_TRAIN_400_600MV_6DB_SNB_B; | |
e3421a18 | 1595 | case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_3_5: |
3c5a62b5 YL |
1596 | case DP_TRAIN_VOLTAGE_SWING_800 | DP_TRAIN_PRE_EMPHASIS_3_5: |
1597 | return EDP_LINK_TRAIN_600_800MV_3_5DB_SNB_B; | |
e3421a18 | 1598 | case DP_TRAIN_VOLTAGE_SWING_800 | DP_TRAIN_PRE_EMPHASIS_0: |
3c5a62b5 YL |
1599 | case DP_TRAIN_VOLTAGE_SWING_1200 | DP_TRAIN_PRE_EMPHASIS_0: |
1600 | return EDP_LINK_TRAIN_800_1200MV_0DB_SNB_B; | |
e3421a18 | 1601 | default: |
3c5a62b5 YL |
1602 | DRM_DEBUG_KMS("Unsupported voltage swing/pre-emphasis level:" |
1603 | "0x%x\n", signal_levels); | |
1604 | return EDP_LINK_TRAIN_400_600MV_0DB_SNB_B; | |
e3421a18 ZW |
1605 | } |
1606 | } | |
1607 | ||
1a2eb460 KP |
1608 | /* Gen7's DP voltage swing and pre-emphasis control */ |
1609 | static uint32_t | |
1610 | intel_gen7_edp_signal_levels(uint8_t train_set) | |
1611 | { | |
1612 | int signal_levels = train_set & (DP_TRAIN_VOLTAGE_SWING_MASK | | |
1613 | DP_TRAIN_PRE_EMPHASIS_MASK); | |
1614 | switch (signal_levels) { | |
1615 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_0: | |
1616 | return EDP_LINK_TRAIN_400MV_0DB_IVB; | |
1617 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_3_5: | |
1618 | return EDP_LINK_TRAIN_400MV_3_5DB_IVB; | |
1619 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_6: | |
1620 | return EDP_LINK_TRAIN_400MV_6DB_IVB; | |
1621 | ||
1622 | case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_0: | |
1623 | return EDP_LINK_TRAIN_600MV_0DB_IVB; | |
1624 | case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_3_5: | |
1625 | return EDP_LINK_TRAIN_600MV_3_5DB_IVB; | |
1626 | ||
1627 | case DP_TRAIN_VOLTAGE_SWING_800 | DP_TRAIN_PRE_EMPHASIS_0: | |
1628 | return EDP_LINK_TRAIN_800MV_0DB_IVB; | |
1629 | case DP_TRAIN_VOLTAGE_SWING_800 | DP_TRAIN_PRE_EMPHASIS_3_5: | |
1630 | return EDP_LINK_TRAIN_800MV_3_5DB_IVB; | |
1631 | ||
1632 | default: | |
1633 | DRM_DEBUG_KMS("Unsupported voltage swing/pre-emphasis level:" | |
1634 | "0x%x\n", signal_levels); | |
1635 | return EDP_LINK_TRAIN_500MV_0DB_IVB; | |
1636 | } | |
1637 | } | |
1638 | ||
d6c0d722 PZ |
1639 | /* Gen7.5's (HSW) DP voltage swing and pre-emphasis control */ |
1640 | static uint32_t | |
1641 | intel_dp_signal_levels_hsw(uint8_t train_set) | |
1642 | { | |
1643 | int signal_levels = train_set & (DP_TRAIN_VOLTAGE_SWING_MASK | | |
1644 | DP_TRAIN_PRE_EMPHASIS_MASK); | |
1645 | switch (signal_levels) { | |
1646 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_0: | |
1647 | return DDI_BUF_EMP_400MV_0DB_HSW; | |
1648 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_3_5: | |
1649 | return DDI_BUF_EMP_400MV_3_5DB_HSW; | |
1650 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_6: | |
1651 | return DDI_BUF_EMP_400MV_6DB_HSW; | |
1652 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_9_5: | |
1653 | return DDI_BUF_EMP_400MV_9_5DB_HSW; | |
1654 | ||
1655 | case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_0: | |
1656 | return DDI_BUF_EMP_600MV_0DB_HSW; | |
1657 | case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_3_5: | |
1658 | return DDI_BUF_EMP_600MV_3_5DB_HSW; | |
1659 | case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_6: | |
1660 | return DDI_BUF_EMP_600MV_6DB_HSW; | |
1661 | ||
1662 | case DP_TRAIN_VOLTAGE_SWING_800 | DP_TRAIN_PRE_EMPHASIS_0: | |
1663 | return DDI_BUF_EMP_800MV_0DB_HSW; | |
1664 | case DP_TRAIN_VOLTAGE_SWING_800 | DP_TRAIN_PRE_EMPHASIS_3_5: | |
1665 | return DDI_BUF_EMP_800MV_3_5DB_HSW; | |
1666 | default: | |
1667 | DRM_DEBUG_KMS("Unsupported voltage swing/pre-emphasis level:" | |
1668 | "0x%x\n", signal_levels); | |
1669 | return DDI_BUF_EMP_400MV_0DB_HSW; | |
1670 | } | |
1671 | } | |
1672 | ||
a4fc5ed6 KP |
1673 | static uint8_t |
1674 | intel_get_lane_status(uint8_t link_status[DP_LINK_STATUS_SIZE], | |
1675 | int lane) | |
1676 | { | |
a4fc5ed6 | 1677 | int s = (lane & 1) * 4; |
93f62dad | 1678 | uint8_t l = link_status[lane>>1]; |
a4fc5ed6 KP |
1679 | |
1680 | return (l >> s) & 0xf; | |
1681 | } | |
1682 | ||
1683 | /* Check for clock recovery is done on all channels */ | |
1684 | static bool | |
1685 | intel_clock_recovery_ok(uint8_t link_status[DP_LINK_STATUS_SIZE], int lane_count) | |
1686 | { | |
1687 | int lane; | |
1688 | uint8_t lane_status; | |
1689 | ||
1690 | for (lane = 0; lane < lane_count; lane++) { | |
1691 | lane_status = intel_get_lane_status(link_status, lane); | |
1692 | if ((lane_status & DP_LANE_CR_DONE) == 0) | |
1693 | return false; | |
1694 | } | |
1695 | return true; | |
1696 | } | |
1697 | ||
1698 | /* Check to see if channel eq is done on all channels */ | |
1699 | #define CHANNEL_EQ_BITS (DP_LANE_CR_DONE|\ | |
1700 | DP_LANE_CHANNEL_EQ_DONE|\ | |
1701 | DP_LANE_SYMBOL_LOCKED) | |
1702 | static bool | |
93f62dad | 1703 | intel_channel_eq_ok(struct intel_dp *intel_dp, uint8_t link_status[DP_LINK_STATUS_SIZE]) |
a4fc5ed6 KP |
1704 | { |
1705 | uint8_t lane_align; | |
1706 | uint8_t lane_status; | |
1707 | int lane; | |
1708 | ||
93f62dad | 1709 | lane_align = intel_dp_link_status(link_status, |
a4fc5ed6 KP |
1710 | DP_LANE_ALIGN_STATUS_UPDATED); |
1711 | if ((lane_align & DP_INTERLANE_ALIGN_DONE) == 0) | |
1712 | return false; | |
33a34e4e | 1713 | for (lane = 0; lane < intel_dp->lane_count; lane++) { |
93f62dad | 1714 | lane_status = intel_get_lane_status(link_status, lane); |
a4fc5ed6 KP |
1715 | if ((lane_status & CHANNEL_EQ_BITS) != CHANNEL_EQ_BITS) |
1716 | return false; | |
1717 | } | |
1718 | return true; | |
1719 | } | |
1720 | ||
1721 | static bool | |
ea5b213a | 1722 | intel_dp_set_link_train(struct intel_dp *intel_dp, |
a4fc5ed6 | 1723 | uint32_t dp_reg_value, |
58e10eb9 | 1724 | uint8_t dp_train_pat) |
a4fc5ed6 | 1725 | { |
4ef69c7a | 1726 | struct drm_device *dev = intel_dp->base.base.dev; |
a4fc5ed6 | 1727 | struct drm_i915_private *dev_priv = dev->dev_private; |
a4fc5ed6 | 1728 | int ret; |
d6c0d722 | 1729 | uint32_t temp; |
a4fc5ed6 | 1730 | |
d6c0d722 PZ |
1731 | if (IS_HASWELL(dev)) { |
1732 | temp = I915_READ(DP_TP_CTL(intel_dp->port)); | |
1733 | ||
1734 | if (dp_train_pat & DP_LINK_SCRAMBLING_DISABLE) | |
1735 | temp |= DP_TP_CTL_SCRAMBLE_DISABLE; | |
1736 | else | |
1737 | temp &= ~DP_TP_CTL_SCRAMBLE_DISABLE; | |
1738 | ||
1739 | temp &= ~DP_TP_CTL_LINK_TRAIN_MASK; | |
1740 | switch (dp_train_pat & DP_TRAINING_PATTERN_MASK) { | |
1741 | case DP_TRAINING_PATTERN_DISABLE: | |
1742 | temp |= DP_TP_CTL_LINK_TRAIN_IDLE; | |
1743 | I915_WRITE(DP_TP_CTL(intel_dp->port), temp); | |
1744 | ||
1745 | if (wait_for((I915_READ(DP_TP_STATUS(intel_dp->port)) & | |
1746 | DP_TP_STATUS_IDLE_DONE), 1)) | |
1747 | DRM_ERROR("Timed out waiting for DP idle patterns\n"); | |
1748 | ||
1749 | temp &= ~DP_TP_CTL_LINK_TRAIN_MASK; | |
1750 | temp |= DP_TP_CTL_LINK_TRAIN_NORMAL; | |
1751 | ||
1752 | break; | |
1753 | case DP_TRAINING_PATTERN_1: | |
1754 | temp |= DP_TP_CTL_LINK_TRAIN_PAT1; | |
1755 | break; | |
1756 | case DP_TRAINING_PATTERN_2: | |
1757 | temp |= DP_TP_CTL_LINK_TRAIN_PAT2; | |
1758 | break; | |
1759 | case DP_TRAINING_PATTERN_3: | |
1760 | temp |= DP_TP_CTL_LINK_TRAIN_PAT3; | |
1761 | break; | |
1762 | } | |
1763 | I915_WRITE(DP_TP_CTL(intel_dp->port), temp); | |
1764 | ||
1765 | } else if (HAS_PCH_CPT(dev) && | |
1766 | (IS_GEN7(dev) || !is_cpu_edp(intel_dp))) { | |
47ea7542 PZ |
1767 | dp_reg_value &= ~DP_LINK_TRAIN_MASK_CPT; |
1768 | ||
1769 | switch (dp_train_pat & DP_TRAINING_PATTERN_MASK) { | |
1770 | case DP_TRAINING_PATTERN_DISABLE: | |
1771 | dp_reg_value |= DP_LINK_TRAIN_OFF_CPT; | |
1772 | break; | |
1773 | case DP_TRAINING_PATTERN_1: | |
1774 | dp_reg_value |= DP_LINK_TRAIN_PAT_1_CPT; | |
1775 | break; | |
1776 | case DP_TRAINING_PATTERN_2: | |
1777 | dp_reg_value |= DP_LINK_TRAIN_PAT_2_CPT; | |
1778 | break; | |
1779 | case DP_TRAINING_PATTERN_3: | |
1780 | DRM_ERROR("DP training pattern 3 not supported\n"); | |
1781 | dp_reg_value |= DP_LINK_TRAIN_PAT_2_CPT; | |
1782 | break; | |
1783 | } | |
1784 | ||
1785 | } else { | |
1786 | dp_reg_value &= ~DP_LINK_TRAIN_MASK; | |
1787 | ||
1788 | switch (dp_train_pat & DP_TRAINING_PATTERN_MASK) { | |
1789 | case DP_TRAINING_PATTERN_DISABLE: | |
1790 | dp_reg_value |= DP_LINK_TRAIN_OFF; | |
1791 | break; | |
1792 | case DP_TRAINING_PATTERN_1: | |
1793 | dp_reg_value |= DP_LINK_TRAIN_PAT_1; | |
1794 | break; | |
1795 | case DP_TRAINING_PATTERN_2: | |
1796 | dp_reg_value |= DP_LINK_TRAIN_PAT_2; | |
1797 | break; | |
1798 | case DP_TRAINING_PATTERN_3: | |
1799 | DRM_ERROR("DP training pattern 3 not supported\n"); | |
1800 | dp_reg_value |= DP_LINK_TRAIN_PAT_2; | |
1801 | break; | |
1802 | } | |
1803 | } | |
1804 | ||
ea5b213a CW |
1805 | I915_WRITE(intel_dp->output_reg, dp_reg_value); |
1806 | POSTING_READ(intel_dp->output_reg); | |
a4fc5ed6 | 1807 | |
ea5b213a | 1808 | intel_dp_aux_native_write_1(intel_dp, |
a4fc5ed6 KP |
1809 | DP_TRAINING_PATTERN_SET, |
1810 | dp_train_pat); | |
1811 | ||
47ea7542 PZ |
1812 | if ((dp_train_pat & DP_TRAINING_PATTERN_MASK) != |
1813 | DP_TRAINING_PATTERN_DISABLE) { | |
1814 | ret = intel_dp_aux_native_write(intel_dp, | |
1815 | DP_TRAINING_LANE0_SET, | |
1816 | intel_dp->train_set, | |
1817 | intel_dp->lane_count); | |
1818 | if (ret != intel_dp->lane_count) | |
1819 | return false; | |
1820 | } | |
a4fc5ed6 KP |
1821 | |
1822 | return true; | |
1823 | } | |
1824 | ||
33a34e4e | 1825 | /* Enable corresponding port and start training pattern 1 */ |
a4fc5ed6 | 1826 | static void |
33a34e4e | 1827 | intel_dp_start_link_train(struct intel_dp *intel_dp) |
a4fc5ed6 | 1828 | { |
4ef69c7a | 1829 | struct drm_device *dev = intel_dp->base.base.dev; |
a4fc5ed6 KP |
1830 | int i; |
1831 | uint8_t voltage; | |
1832 | bool clock_recovery = false; | |
cdb0e95b | 1833 | int voltage_tries, loop_tries; |
ea5b213a | 1834 | uint32_t DP = intel_dp->DP; |
a4fc5ed6 | 1835 | |
3cf2efb1 CW |
1836 | /* Write the link configuration data */ |
1837 | intel_dp_aux_native_write(intel_dp, DP_LINK_BW_SET, | |
1838 | intel_dp->link_configuration, | |
1839 | DP_LINK_CONFIGURATION_SIZE); | |
a4fc5ed6 KP |
1840 | |
1841 | DP |= DP_PORT_EN; | |
1a2eb460 | 1842 | |
33a34e4e | 1843 | memset(intel_dp->train_set, 0, 4); |
a4fc5ed6 | 1844 | voltage = 0xff; |
cdb0e95b KP |
1845 | voltage_tries = 0; |
1846 | loop_tries = 0; | |
a4fc5ed6 KP |
1847 | clock_recovery = false; |
1848 | for (;;) { | |
33a34e4e | 1849 | /* Use intel_dp->train_set[0] to set the voltage and pre emphasis values */ |
93f62dad | 1850 | uint8_t link_status[DP_LINK_STATUS_SIZE]; |
e3421a18 | 1851 | uint32_t signal_levels; |
417e822d | 1852 | |
d6c0d722 PZ |
1853 | if (IS_HASWELL(dev)) { |
1854 | signal_levels = intel_dp_signal_levels_hsw( | |
1855 | intel_dp->train_set[0]); | |
1856 | DP = (DP & ~DDI_BUF_EMP_MASK) | signal_levels; | |
1857 | } else if (IS_GEN7(dev) && is_cpu_edp(intel_dp) && !IS_VALLEYVIEW(dev)) { | |
1a2eb460 KP |
1858 | signal_levels = intel_gen7_edp_signal_levels(intel_dp->train_set[0]); |
1859 | DP = (DP & ~EDP_LINK_TRAIN_VOL_EMP_MASK_IVB) | signal_levels; | |
1860 | } else if (IS_GEN6(dev) && is_cpu_edp(intel_dp)) { | |
33a34e4e | 1861 | signal_levels = intel_gen6_edp_signal_levels(intel_dp->train_set[0]); |
e3421a18 ZW |
1862 | DP = (DP & ~EDP_LINK_TRAIN_VOL_EMP_MASK_SNB) | signal_levels; |
1863 | } else { | |
93f62dad | 1864 | signal_levels = intel_dp_signal_levels(intel_dp->train_set[0]); |
e3421a18 ZW |
1865 | DP = (DP & ~(DP_VOLTAGE_MASK|DP_PRE_EMPHASIS_MASK)) | signal_levels; |
1866 | } | |
d6c0d722 PZ |
1867 | DRM_DEBUG_KMS("training pattern 1 signal levels %08x\n", |
1868 | signal_levels); | |
a4fc5ed6 | 1869 | |
47ea7542 | 1870 | if (!intel_dp_set_link_train(intel_dp, DP, |
81055854 AJ |
1871 | DP_TRAINING_PATTERN_1 | |
1872 | DP_LINK_SCRAMBLING_DISABLE)) | |
a4fc5ed6 | 1873 | break; |
a4fc5ed6 KP |
1874 | /* Set training pattern 1 */ |
1875 | ||
3cf2efb1 | 1876 | udelay(100); |
93f62dad KP |
1877 | if (!intel_dp_get_link_status(intel_dp, link_status)) { |
1878 | DRM_ERROR("failed to get link status\n"); | |
a4fc5ed6 | 1879 | break; |
93f62dad | 1880 | } |
a4fc5ed6 | 1881 | |
93f62dad KP |
1882 | if (intel_clock_recovery_ok(link_status, intel_dp->lane_count)) { |
1883 | DRM_DEBUG_KMS("clock recovery OK\n"); | |
3cf2efb1 CW |
1884 | clock_recovery = true; |
1885 | break; | |
1886 | } | |
1887 | ||
1888 | /* Check to see if we've tried the max voltage */ | |
1889 | for (i = 0; i < intel_dp->lane_count; i++) | |
1890 | if ((intel_dp->train_set[i] & DP_TRAIN_MAX_SWING_REACHED) == 0) | |
a4fc5ed6 | 1891 | break; |
0d710688 | 1892 | if (i == intel_dp->lane_count && voltage_tries == 5) { |
cdb0e95b KP |
1893 | ++loop_tries; |
1894 | if (loop_tries == 5) { | |
1895 | DRM_DEBUG_KMS("too many full retries, give up\n"); | |
1896 | break; | |
1897 | } | |
1898 | memset(intel_dp->train_set, 0, 4); | |
1899 | voltage_tries = 0; | |
1900 | continue; | |
1901 | } | |
a4fc5ed6 | 1902 | |
3cf2efb1 CW |
1903 | /* Check to see if we've tried the same voltage 5 times */ |
1904 | if ((intel_dp->train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK) == voltage) { | |
cdb0e95b KP |
1905 | ++voltage_tries; |
1906 | if (voltage_tries == 5) { | |
1907 | DRM_DEBUG_KMS("too many voltage retries, give up\n"); | |
a4fc5ed6 | 1908 | break; |
cdb0e95b | 1909 | } |
3cf2efb1 | 1910 | } else |
cdb0e95b | 1911 | voltage_tries = 0; |
3cf2efb1 | 1912 | voltage = intel_dp->train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK; |
a4fc5ed6 | 1913 | |
3cf2efb1 | 1914 | /* Compute new intel_dp->train_set as requested by target */ |
93f62dad | 1915 | intel_get_adjust_train(intel_dp, link_status); |
a4fc5ed6 KP |
1916 | } |
1917 | ||
33a34e4e JB |
1918 | intel_dp->DP = DP; |
1919 | } | |
1920 | ||
1921 | static void | |
1922 | intel_dp_complete_link_train(struct intel_dp *intel_dp) | |
1923 | { | |
4ef69c7a | 1924 | struct drm_device *dev = intel_dp->base.base.dev; |
33a34e4e | 1925 | bool channel_eq = false; |
37f80975 | 1926 | int tries, cr_tries; |
33a34e4e JB |
1927 | uint32_t DP = intel_dp->DP; |
1928 | ||
a4fc5ed6 KP |
1929 | /* channel equalization */ |
1930 | tries = 0; | |
37f80975 | 1931 | cr_tries = 0; |
a4fc5ed6 KP |
1932 | channel_eq = false; |
1933 | for (;;) { | |
33a34e4e | 1934 | /* Use intel_dp->train_set[0] to set the voltage and pre emphasis values */ |
e3421a18 | 1935 | uint32_t signal_levels; |
93f62dad | 1936 | uint8_t link_status[DP_LINK_STATUS_SIZE]; |
e3421a18 | 1937 | |
37f80975 JB |
1938 | if (cr_tries > 5) { |
1939 | DRM_ERROR("failed to train DP, aborting\n"); | |
1940 | intel_dp_link_down(intel_dp); | |
1941 | break; | |
1942 | } | |
1943 | ||
d6c0d722 PZ |
1944 | if (IS_HASWELL(dev)) { |
1945 | signal_levels = intel_dp_signal_levels_hsw(intel_dp->train_set[0]); | |
1946 | DP = (DP & ~DDI_BUF_EMP_MASK) | signal_levels; | |
1947 | } else if (IS_GEN7(dev) && is_cpu_edp(intel_dp) && !IS_VALLEYVIEW(dev)) { | |
1a2eb460 KP |
1948 | signal_levels = intel_gen7_edp_signal_levels(intel_dp->train_set[0]); |
1949 | DP = (DP & ~EDP_LINK_TRAIN_VOL_EMP_MASK_IVB) | signal_levels; | |
1950 | } else if (IS_GEN6(dev) && is_cpu_edp(intel_dp)) { | |
33a34e4e | 1951 | signal_levels = intel_gen6_edp_signal_levels(intel_dp->train_set[0]); |
e3421a18 ZW |
1952 | DP = (DP & ~EDP_LINK_TRAIN_VOL_EMP_MASK_SNB) | signal_levels; |
1953 | } else { | |
93f62dad | 1954 | signal_levels = intel_dp_signal_levels(intel_dp->train_set[0]); |
e3421a18 ZW |
1955 | DP = (DP & ~(DP_VOLTAGE_MASK|DP_PRE_EMPHASIS_MASK)) | signal_levels; |
1956 | } | |
1957 | ||
a4fc5ed6 | 1958 | /* channel eq pattern */ |
47ea7542 | 1959 | if (!intel_dp_set_link_train(intel_dp, DP, |
81055854 AJ |
1960 | DP_TRAINING_PATTERN_2 | |
1961 | DP_LINK_SCRAMBLING_DISABLE)) | |
a4fc5ed6 KP |
1962 | break; |
1963 | ||
3cf2efb1 | 1964 | udelay(400); |
93f62dad | 1965 | if (!intel_dp_get_link_status(intel_dp, link_status)) |
a4fc5ed6 | 1966 | break; |
a4fc5ed6 | 1967 | |
37f80975 | 1968 | /* Make sure clock is still ok */ |
93f62dad | 1969 | if (!intel_clock_recovery_ok(link_status, intel_dp->lane_count)) { |
37f80975 JB |
1970 | intel_dp_start_link_train(intel_dp); |
1971 | cr_tries++; | |
1972 | continue; | |
1973 | } | |
1974 | ||
93f62dad | 1975 | if (intel_channel_eq_ok(intel_dp, link_status)) { |
3cf2efb1 CW |
1976 | channel_eq = true; |
1977 | break; | |
1978 | } | |
a4fc5ed6 | 1979 | |
37f80975 JB |
1980 | /* Try 5 times, then try clock recovery if that fails */ |
1981 | if (tries > 5) { | |
1982 | intel_dp_link_down(intel_dp); | |
1983 | intel_dp_start_link_train(intel_dp); | |
1984 | tries = 0; | |
1985 | cr_tries++; | |
1986 | continue; | |
1987 | } | |
a4fc5ed6 | 1988 | |
3cf2efb1 | 1989 | /* Compute new intel_dp->train_set as requested by target */ |
93f62dad | 1990 | intel_get_adjust_train(intel_dp, link_status); |
3cf2efb1 | 1991 | ++tries; |
869184a6 | 1992 | } |
3cf2efb1 | 1993 | |
d6c0d722 PZ |
1994 | if (channel_eq) |
1995 | DRM_DEBUG_KMS("Channel EQ done. DP Training successfull\n"); | |
1996 | ||
47ea7542 | 1997 | intel_dp_set_link_train(intel_dp, DP, DP_TRAINING_PATTERN_DISABLE); |
a4fc5ed6 KP |
1998 | } |
1999 | ||
2000 | static void | |
ea5b213a | 2001 | intel_dp_link_down(struct intel_dp *intel_dp) |
a4fc5ed6 | 2002 | { |
4ef69c7a | 2003 | struct drm_device *dev = intel_dp->base.base.dev; |
a4fc5ed6 | 2004 | struct drm_i915_private *dev_priv = dev->dev_private; |
ea5b213a | 2005 | uint32_t DP = intel_dp->DP; |
a4fc5ed6 | 2006 | |
0c33d8d7 | 2007 | if (WARN_ON((I915_READ(intel_dp->output_reg) & DP_PORT_EN) == 0)) |
1b39d6f3 CW |
2008 | return; |
2009 | ||
28c97730 | 2010 | DRM_DEBUG_KMS("\n"); |
32f9d658 | 2011 | |
1a2eb460 | 2012 | if (HAS_PCH_CPT(dev) && (IS_GEN7(dev) || !is_cpu_edp(intel_dp))) { |
e3421a18 | 2013 | DP &= ~DP_LINK_TRAIN_MASK_CPT; |
ea5b213a | 2014 | I915_WRITE(intel_dp->output_reg, DP | DP_LINK_TRAIN_PAT_IDLE_CPT); |
e3421a18 ZW |
2015 | } else { |
2016 | DP &= ~DP_LINK_TRAIN_MASK; | |
ea5b213a | 2017 | I915_WRITE(intel_dp->output_reg, DP | DP_LINK_TRAIN_PAT_IDLE); |
e3421a18 | 2018 | } |
fe255d00 | 2019 | POSTING_READ(intel_dp->output_reg); |
5eb08b69 | 2020 | |
fe255d00 | 2021 | msleep(17); |
5eb08b69 | 2022 | |
493a7081 | 2023 | if (HAS_PCH_IBX(dev) && |
1b39d6f3 | 2024 | I915_READ(intel_dp->output_reg) & DP_PIPEB_SELECT) { |
31acbcc4 CW |
2025 | struct drm_crtc *crtc = intel_dp->base.base.crtc; |
2026 | ||
5bddd17f EA |
2027 | /* Hardware workaround: leaving our transcoder select |
2028 | * set to transcoder B while it's off will prevent the | |
2029 | * corresponding HDMI output on transcoder A. | |
2030 | * | |
2031 | * Combine this with another hardware workaround: | |
2032 | * transcoder select bit can only be cleared while the | |
2033 | * port is enabled. | |
2034 | */ | |
2035 | DP &= ~DP_PIPEB_SELECT; | |
2036 | I915_WRITE(intel_dp->output_reg, DP); | |
2037 | ||
2038 | /* Changes to enable or select take place the vblank | |
2039 | * after being written. | |
2040 | */ | |
31acbcc4 CW |
2041 | if (crtc == NULL) { |
2042 | /* We can arrive here never having been attached | |
2043 | * to a CRTC, for instance, due to inheriting | |
2044 | * random state from the BIOS. | |
2045 | * | |
2046 | * If the pipe is not running, play safe and | |
2047 | * wait for the clocks to stabilise before | |
2048 | * continuing. | |
2049 | */ | |
2050 | POSTING_READ(intel_dp->output_reg); | |
2051 | msleep(50); | |
2052 | } else | |
2053 | intel_wait_for_vblank(dev, to_intel_crtc(crtc)->pipe); | |
5bddd17f EA |
2054 | } |
2055 | ||
832afda6 | 2056 | DP &= ~DP_AUDIO_OUTPUT_ENABLE; |
ea5b213a CW |
2057 | I915_WRITE(intel_dp->output_reg, DP & ~DP_PORT_EN); |
2058 | POSTING_READ(intel_dp->output_reg); | |
f01eca2e | 2059 | msleep(intel_dp->panel_power_down_delay); |
a4fc5ed6 KP |
2060 | } |
2061 | ||
26d61aad KP |
2062 | static bool |
2063 | intel_dp_get_dpcd(struct intel_dp *intel_dp) | |
92fd8fd1 | 2064 | { |
92fd8fd1 | 2065 | if (intel_dp_aux_native_read_retry(intel_dp, 0x000, intel_dp->dpcd, |
b091cd92 AJ |
2066 | sizeof(intel_dp->dpcd)) == 0) |
2067 | return false; /* aux transfer failed */ | |
92fd8fd1 | 2068 | |
b091cd92 AJ |
2069 | if (intel_dp->dpcd[DP_DPCD_REV] == 0) |
2070 | return false; /* DPCD not present */ | |
2071 | ||
2072 | if (!(intel_dp->dpcd[DP_DOWNSTREAMPORT_PRESENT] & | |
2073 | DP_DWN_STRM_PORT_PRESENT)) | |
2074 | return true; /* native DP sink */ | |
2075 | ||
2076 | if (intel_dp->dpcd[DP_DPCD_REV] == 0x10) | |
2077 | return true; /* no per-port downstream info */ | |
2078 | ||
2079 | if (intel_dp_aux_native_read_retry(intel_dp, DP_DOWNSTREAM_PORT_0, | |
2080 | intel_dp->downstream_ports, | |
2081 | DP_MAX_DOWNSTREAM_PORTS) == 0) | |
2082 | return false; /* downstream port status fetch failed */ | |
2083 | ||
2084 | return true; | |
92fd8fd1 KP |
2085 | } |
2086 | ||
0d198328 AJ |
2087 | static void |
2088 | intel_dp_probe_oui(struct intel_dp *intel_dp) | |
2089 | { | |
2090 | u8 buf[3]; | |
2091 | ||
2092 | if (!(intel_dp->dpcd[DP_DOWN_STREAM_PORT_COUNT] & DP_OUI_SUPPORT)) | |
2093 | return; | |
2094 | ||
351cfc34 DV |
2095 | ironlake_edp_panel_vdd_on(intel_dp); |
2096 | ||
0d198328 AJ |
2097 | if (intel_dp_aux_native_read_retry(intel_dp, DP_SINK_OUI, buf, 3)) |
2098 | DRM_DEBUG_KMS("Sink OUI: %02hx%02hx%02hx\n", | |
2099 | buf[0], buf[1], buf[2]); | |
2100 | ||
2101 | if (intel_dp_aux_native_read_retry(intel_dp, DP_BRANCH_OUI, buf, 3)) | |
2102 | DRM_DEBUG_KMS("Branch OUI: %02hx%02hx%02hx\n", | |
2103 | buf[0], buf[1], buf[2]); | |
351cfc34 DV |
2104 | |
2105 | ironlake_edp_panel_vdd_off(intel_dp, false); | |
0d198328 AJ |
2106 | } |
2107 | ||
a60f0e38 JB |
2108 | static bool |
2109 | intel_dp_get_sink_irq(struct intel_dp *intel_dp, u8 *sink_irq_vector) | |
2110 | { | |
2111 | int ret; | |
2112 | ||
2113 | ret = intel_dp_aux_native_read_retry(intel_dp, | |
2114 | DP_DEVICE_SERVICE_IRQ_VECTOR, | |
2115 | sink_irq_vector, 1); | |
2116 | if (!ret) | |
2117 | return false; | |
2118 | ||
2119 | return true; | |
2120 | } | |
2121 | ||
2122 | static void | |
2123 | intel_dp_handle_test_request(struct intel_dp *intel_dp) | |
2124 | { | |
2125 | /* NAK by default */ | |
2126 | intel_dp_aux_native_write_1(intel_dp, DP_TEST_RESPONSE, DP_TEST_ACK); | |
2127 | } | |
2128 | ||
a4fc5ed6 KP |
2129 | /* |
2130 | * According to DP spec | |
2131 | * 5.1.2: | |
2132 | * 1. Read DPCD | |
2133 | * 2. Configure link according to Receiver Capabilities | |
2134 | * 3. Use Link Training from 2.5.3.3 and 3.5.1.3 | |
2135 | * 4. Check link status on receipt of hot-plug interrupt | |
2136 | */ | |
2137 | ||
2138 | static void | |
ea5b213a | 2139 | intel_dp_check_link_status(struct intel_dp *intel_dp) |
a4fc5ed6 | 2140 | { |
a60f0e38 | 2141 | u8 sink_irq_vector; |
93f62dad | 2142 | u8 link_status[DP_LINK_STATUS_SIZE]; |
a60f0e38 | 2143 | |
24e804ba | 2144 | if (!intel_dp->base.connectors_active) |
d2b996ac | 2145 | return; |
59cd09e1 | 2146 | |
24e804ba | 2147 | if (WARN_ON(!intel_dp->base.base.crtc)) |
a4fc5ed6 KP |
2148 | return; |
2149 | ||
92fd8fd1 | 2150 | /* Try to read receiver status if the link appears to be up */ |
93f62dad | 2151 | if (!intel_dp_get_link_status(intel_dp, link_status)) { |
ea5b213a | 2152 | intel_dp_link_down(intel_dp); |
a4fc5ed6 KP |
2153 | return; |
2154 | } | |
2155 | ||
92fd8fd1 | 2156 | /* Now read the DPCD to see if it's actually running */ |
26d61aad | 2157 | if (!intel_dp_get_dpcd(intel_dp)) { |
59cd09e1 JB |
2158 | intel_dp_link_down(intel_dp); |
2159 | return; | |
2160 | } | |
2161 | ||
a60f0e38 JB |
2162 | /* Try to read the source of the interrupt */ |
2163 | if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11 && | |
2164 | intel_dp_get_sink_irq(intel_dp, &sink_irq_vector)) { | |
2165 | /* Clear interrupt source */ | |
2166 | intel_dp_aux_native_write_1(intel_dp, | |
2167 | DP_DEVICE_SERVICE_IRQ_VECTOR, | |
2168 | sink_irq_vector); | |
2169 | ||
2170 | if (sink_irq_vector & DP_AUTOMATED_TEST_REQUEST) | |
2171 | intel_dp_handle_test_request(intel_dp); | |
2172 | if (sink_irq_vector & (DP_CP_IRQ | DP_SINK_SPECIFIC_IRQ)) | |
2173 | DRM_DEBUG_DRIVER("CP or sink specific irq unhandled\n"); | |
2174 | } | |
2175 | ||
93f62dad | 2176 | if (!intel_channel_eq_ok(intel_dp, link_status)) { |
92fd8fd1 KP |
2177 | DRM_DEBUG_KMS("%s: channel EQ not ok, retraining\n", |
2178 | drm_get_encoder_name(&intel_dp->base.base)); | |
33a34e4e JB |
2179 | intel_dp_start_link_train(intel_dp); |
2180 | intel_dp_complete_link_train(intel_dp); | |
2181 | } | |
a4fc5ed6 | 2182 | } |
a4fc5ed6 | 2183 | |
07d3dc18 | 2184 | /* XXX this is probably wrong for multiple downstream ports */ |
71ba9000 | 2185 | static enum drm_connector_status |
26d61aad | 2186 | intel_dp_detect_dpcd(struct intel_dp *intel_dp) |
71ba9000 | 2187 | { |
07d3dc18 AJ |
2188 | uint8_t *dpcd = intel_dp->dpcd; |
2189 | bool hpd; | |
2190 | uint8_t type; | |
2191 | ||
2192 | if (!intel_dp_get_dpcd(intel_dp)) | |
2193 | return connector_status_disconnected; | |
2194 | ||
2195 | /* if there's no downstream port, we're done */ | |
2196 | if (!(dpcd[DP_DOWNSTREAMPORT_PRESENT] & DP_DWN_STRM_PORT_PRESENT)) | |
2197 | return connector_status_connected; | |
2198 | ||
2199 | /* If we're HPD-aware, SINK_COUNT changes dynamically */ | |
2200 | hpd = !!(intel_dp->downstream_ports[0] & DP_DS_PORT_HPD); | |
2201 | if (hpd) { | |
da131a46 | 2202 | uint8_t reg; |
07d3dc18 | 2203 | if (!intel_dp_aux_native_read_retry(intel_dp, DP_SINK_COUNT, |
da131a46 | 2204 | ®, 1)) |
07d3dc18 | 2205 | return connector_status_unknown; |
da131a46 AJ |
2206 | return DP_GET_SINK_COUNT(reg) ? connector_status_connected |
2207 | : connector_status_disconnected; | |
07d3dc18 AJ |
2208 | } |
2209 | ||
2210 | /* If no HPD, poke DDC gently */ | |
2211 | if (drm_probe_ddc(&intel_dp->adapter)) | |
26d61aad | 2212 | return connector_status_connected; |
07d3dc18 AJ |
2213 | |
2214 | /* Well we tried, say unknown for unreliable port types */ | |
2215 | type = intel_dp->downstream_ports[0] & DP_DS_PORT_TYPE_MASK; | |
2216 | if (type == DP_DS_PORT_TYPE_VGA || type == DP_DS_PORT_TYPE_NON_EDID) | |
2217 | return connector_status_unknown; | |
2218 | ||
2219 | /* Anything else is out of spec, warn and ignore */ | |
2220 | DRM_DEBUG_KMS("Broken DP branch device, ignoring\n"); | |
26d61aad | 2221 | return connector_status_disconnected; |
71ba9000 AJ |
2222 | } |
2223 | ||
5eb08b69 | 2224 | static enum drm_connector_status |
a9756bb5 | 2225 | ironlake_dp_detect(struct intel_dp *intel_dp) |
5eb08b69 | 2226 | { |
5eb08b69 ZW |
2227 | enum drm_connector_status status; |
2228 | ||
fe16d949 CW |
2229 | /* Can't disconnect eDP, but you can close the lid... */ |
2230 | if (is_edp(intel_dp)) { | |
2231 | status = intel_panel_detect(intel_dp->base.base.dev); | |
2232 | if (status == connector_status_unknown) | |
2233 | status = connector_status_connected; | |
2234 | return status; | |
2235 | } | |
01cb9ea6 | 2236 | |
26d61aad | 2237 | return intel_dp_detect_dpcd(intel_dp); |
5eb08b69 ZW |
2238 | } |
2239 | ||
a4fc5ed6 | 2240 | static enum drm_connector_status |
a9756bb5 | 2241 | g4x_dp_detect(struct intel_dp *intel_dp) |
a4fc5ed6 | 2242 | { |
4ef69c7a | 2243 | struct drm_device *dev = intel_dp->base.base.dev; |
a4fc5ed6 | 2244 | struct drm_i915_private *dev_priv = dev->dev_private; |
10f76a38 | 2245 | uint32_t bit; |
5eb08b69 | 2246 | |
ea5b213a | 2247 | switch (intel_dp->output_reg) { |
a4fc5ed6 | 2248 | case DP_B: |
10f76a38 | 2249 | bit = DPB_HOTPLUG_LIVE_STATUS; |
a4fc5ed6 KP |
2250 | break; |
2251 | case DP_C: | |
10f76a38 | 2252 | bit = DPC_HOTPLUG_LIVE_STATUS; |
a4fc5ed6 KP |
2253 | break; |
2254 | case DP_D: | |
10f76a38 | 2255 | bit = DPD_HOTPLUG_LIVE_STATUS; |
a4fc5ed6 KP |
2256 | break; |
2257 | default: | |
2258 | return connector_status_unknown; | |
2259 | } | |
2260 | ||
10f76a38 | 2261 | if ((I915_READ(PORT_HOTPLUG_STAT) & bit) == 0) |
a4fc5ed6 KP |
2262 | return connector_status_disconnected; |
2263 | ||
26d61aad | 2264 | return intel_dp_detect_dpcd(intel_dp); |
a9756bb5 ZW |
2265 | } |
2266 | ||
8c241fef KP |
2267 | static struct edid * |
2268 | intel_dp_get_edid(struct drm_connector *connector, struct i2c_adapter *adapter) | |
2269 | { | |
2270 | struct intel_dp *intel_dp = intel_attached_dp(connector); | |
2271 | struct edid *edid; | |
d6f24d0f JB |
2272 | int size; |
2273 | ||
2274 | if (is_edp(intel_dp)) { | |
2275 | if (!intel_dp->edid) | |
2276 | return NULL; | |
2277 | ||
2278 | size = (intel_dp->edid->extensions + 1) * EDID_LENGTH; | |
2279 | edid = kmalloc(size, GFP_KERNEL); | |
2280 | if (!edid) | |
2281 | return NULL; | |
2282 | ||
2283 | memcpy(edid, intel_dp->edid, size); | |
2284 | return edid; | |
2285 | } | |
8c241fef | 2286 | |
8c241fef | 2287 | edid = drm_get_edid(connector, adapter); |
8c241fef KP |
2288 | return edid; |
2289 | } | |
2290 | ||
2291 | static int | |
2292 | intel_dp_get_edid_modes(struct drm_connector *connector, struct i2c_adapter *adapter) | |
2293 | { | |
2294 | struct intel_dp *intel_dp = intel_attached_dp(connector); | |
2295 | int ret; | |
2296 | ||
d6f24d0f JB |
2297 | if (is_edp(intel_dp)) { |
2298 | drm_mode_connector_update_edid_property(connector, | |
2299 | intel_dp->edid); | |
2300 | ret = drm_add_edid_modes(connector, intel_dp->edid); | |
2301 | drm_edid_to_eld(connector, | |
2302 | intel_dp->edid); | |
d6f24d0f JB |
2303 | return intel_dp->edid_mode_count; |
2304 | } | |
2305 | ||
8c241fef | 2306 | ret = intel_ddc_get_modes(connector, adapter); |
8c241fef KP |
2307 | return ret; |
2308 | } | |
2309 | ||
2310 | ||
a9756bb5 ZW |
2311 | /** |
2312 | * Uses CRT_HOTPLUG_EN and CRT_HOTPLUG_STAT to detect DP connection. | |
2313 | * | |
2314 | * \return true if DP port is connected. | |
2315 | * \return false if DP port is disconnected. | |
2316 | */ | |
2317 | static enum drm_connector_status | |
2318 | intel_dp_detect(struct drm_connector *connector, bool force) | |
2319 | { | |
2320 | struct intel_dp *intel_dp = intel_attached_dp(connector); | |
2321 | struct drm_device *dev = intel_dp->base.base.dev; | |
2322 | enum drm_connector_status status; | |
2323 | struct edid *edid = NULL; | |
2324 | ||
2325 | intel_dp->has_audio = false; | |
2326 | ||
2327 | if (HAS_PCH_SPLIT(dev)) | |
2328 | status = ironlake_dp_detect(intel_dp); | |
2329 | else | |
2330 | status = g4x_dp_detect(intel_dp); | |
1b9be9d0 | 2331 | |
ac66ae83 AJ |
2332 | DRM_DEBUG_KMS("DPCD: %02hx%02hx%02hx%02hx%02hx%02hx%02hx%02hx\n", |
2333 | intel_dp->dpcd[0], intel_dp->dpcd[1], intel_dp->dpcd[2], | |
2334 | intel_dp->dpcd[3], intel_dp->dpcd[4], intel_dp->dpcd[5], | |
2335 | intel_dp->dpcd[6], intel_dp->dpcd[7]); | |
1b9be9d0 | 2336 | |
a9756bb5 ZW |
2337 | if (status != connector_status_connected) |
2338 | return status; | |
2339 | ||
0d198328 AJ |
2340 | intel_dp_probe_oui(intel_dp); |
2341 | ||
c3e5f67b DV |
2342 | if (intel_dp->force_audio != HDMI_AUDIO_AUTO) { |
2343 | intel_dp->has_audio = (intel_dp->force_audio == HDMI_AUDIO_ON); | |
f684960e | 2344 | } else { |
8c241fef | 2345 | edid = intel_dp_get_edid(connector, &intel_dp->adapter); |
f684960e CW |
2346 | if (edid) { |
2347 | intel_dp->has_audio = drm_detect_monitor_audio(edid); | |
f684960e CW |
2348 | kfree(edid); |
2349 | } | |
a9756bb5 ZW |
2350 | } |
2351 | ||
2352 | return connector_status_connected; | |
a4fc5ed6 KP |
2353 | } |
2354 | ||
2355 | static int intel_dp_get_modes(struct drm_connector *connector) | |
2356 | { | |
df0e9248 | 2357 | struct intel_dp *intel_dp = intel_attached_dp(connector); |
4ef69c7a | 2358 | struct drm_device *dev = intel_dp->base.base.dev; |
32f9d658 ZW |
2359 | struct drm_i915_private *dev_priv = dev->dev_private; |
2360 | int ret; | |
a4fc5ed6 KP |
2361 | |
2362 | /* We should parse the EDID data and find out if it has an audio sink | |
2363 | */ | |
2364 | ||
8c241fef | 2365 | ret = intel_dp_get_edid_modes(connector, &intel_dp->adapter); |
b9efc480 | 2366 | if (ret) { |
d15456de | 2367 | if (is_edp(intel_dp) && !intel_dp->panel_fixed_mode) { |
b9efc480 ZY |
2368 | struct drm_display_mode *newmode; |
2369 | list_for_each_entry(newmode, &connector->probed_modes, | |
2370 | head) { | |
d15456de KP |
2371 | if ((newmode->type & DRM_MODE_TYPE_PREFERRED)) { |
2372 | intel_dp->panel_fixed_mode = | |
b9efc480 ZY |
2373 | drm_mode_duplicate(dev, newmode); |
2374 | break; | |
2375 | } | |
2376 | } | |
2377 | } | |
32f9d658 | 2378 | return ret; |
b9efc480 | 2379 | } |
32f9d658 ZW |
2380 | |
2381 | /* if eDP has no EDID, try to use fixed panel mode from VBT */ | |
4d926461 | 2382 | if (is_edp(intel_dp)) { |
47f0eb22 | 2383 | /* initialize panel mode from VBT if available for eDP */ |
d15456de KP |
2384 | if (intel_dp->panel_fixed_mode == NULL && dev_priv->lfp_lvds_vbt_mode != NULL) { |
2385 | intel_dp->panel_fixed_mode = | |
47f0eb22 | 2386 | drm_mode_duplicate(dev, dev_priv->lfp_lvds_vbt_mode); |
d15456de KP |
2387 | if (intel_dp->panel_fixed_mode) { |
2388 | intel_dp->panel_fixed_mode->type |= | |
47f0eb22 KP |
2389 | DRM_MODE_TYPE_PREFERRED; |
2390 | } | |
2391 | } | |
d15456de | 2392 | if (intel_dp->panel_fixed_mode) { |
32f9d658 | 2393 | struct drm_display_mode *mode; |
d15456de | 2394 | mode = drm_mode_duplicate(dev, intel_dp->panel_fixed_mode); |
32f9d658 ZW |
2395 | drm_mode_probed_add(connector, mode); |
2396 | return 1; | |
2397 | } | |
2398 | } | |
2399 | return 0; | |
a4fc5ed6 KP |
2400 | } |
2401 | ||
1aad7ac0 CW |
2402 | static bool |
2403 | intel_dp_detect_audio(struct drm_connector *connector) | |
2404 | { | |
2405 | struct intel_dp *intel_dp = intel_attached_dp(connector); | |
2406 | struct edid *edid; | |
2407 | bool has_audio = false; | |
2408 | ||
8c241fef | 2409 | edid = intel_dp_get_edid(connector, &intel_dp->adapter); |
1aad7ac0 CW |
2410 | if (edid) { |
2411 | has_audio = drm_detect_monitor_audio(edid); | |
1aad7ac0 CW |
2412 | kfree(edid); |
2413 | } | |
2414 | ||
2415 | return has_audio; | |
2416 | } | |
2417 | ||
f684960e CW |
2418 | static int |
2419 | intel_dp_set_property(struct drm_connector *connector, | |
2420 | struct drm_property *property, | |
2421 | uint64_t val) | |
2422 | { | |
e953fd7b | 2423 | struct drm_i915_private *dev_priv = connector->dev->dev_private; |
f684960e CW |
2424 | struct intel_dp *intel_dp = intel_attached_dp(connector); |
2425 | int ret; | |
2426 | ||
2427 | ret = drm_connector_property_set_value(connector, property, val); | |
2428 | if (ret) | |
2429 | return ret; | |
2430 | ||
3f43c48d | 2431 | if (property == dev_priv->force_audio_property) { |
1aad7ac0 CW |
2432 | int i = val; |
2433 | bool has_audio; | |
2434 | ||
2435 | if (i == intel_dp->force_audio) | |
f684960e CW |
2436 | return 0; |
2437 | ||
1aad7ac0 | 2438 | intel_dp->force_audio = i; |
f684960e | 2439 | |
c3e5f67b | 2440 | if (i == HDMI_AUDIO_AUTO) |
1aad7ac0 CW |
2441 | has_audio = intel_dp_detect_audio(connector); |
2442 | else | |
c3e5f67b | 2443 | has_audio = (i == HDMI_AUDIO_ON); |
1aad7ac0 CW |
2444 | |
2445 | if (has_audio == intel_dp->has_audio) | |
f684960e CW |
2446 | return 0; |
2447 | ||
1aad7ac0 | 2448 | intel_dp->has_audio = has_audio; |
f684960e CW |
2449 | goto done; |
2450 | } | |
2451 | ||
e953fd7b CW |
2452 | if (property == dev_priv->broadcast_rgb_property) { |
2453 | if (val == !!intel_dp->color_range) | |
2454 | return 0; | |
2455 | ||
2456 | intel_dp->color_range = val ? DP_COLOR_RANGE_16_235 : 0; | |
2457 | goto done; | |
2458 | } | |
2459 | ||
f684960e CW |
2460 | return -EINVAL; |
2461 | ||
2462 | done: | |
2463 | if (intel_dp->base.base.crtc) { | |
2464 | struct drm_crtc *crtc = intel_dp->base.base.crtc; | |
a6778b3c DV |
2465 | intel_set_mode(crtc, &crtc->mode, |
2466 | crtc->x, crtc->y, crtc->fb); | |
f684960e CW |
2467 | } |
2468 | ||
2469 | return 0; | |
2470 | } | |
2471 | ||
a4fc5ed6 | 2472 | static void |
0206e353 | 2473 | intel_dp_destroy(struct drm_connector *connector) |
a4fc5ed6 | 2474 | { |
aaa6fd2a MG |
2475 | struct drm_device *dev = connector->dev; |
2476 | ||
2477 | if (intel_dpd_is_edp(dev)) | |
2478 | intel_panel_destroy_backlight(dev); | |
2479 | ||
a4fc5ed6 KP |
2480 | drm_sysfs_connector_remove(connector); |
2481 | drm_connector_cleanup(connector); | |
55f78c43 | 2482 | kfree(connector); |
a4fc5ed6 KP |
2483 | } |
2484 | ||
24d05927 DV |
2485 | static void intel_dp_encoder_destroy(struct drm_encoder *encoder) |
2486 | { | |
2487 | struct intel_dp *intel_dp = enc_to_intel_dp(encoder); | |
2488 | ||
2489 | i2c_del_adapter(&intel_dp->adapter); | |
2490 | drm_encoder_cleanup(encoder); | |
bd943159 | 2491 | if (is_edp(intel_dp)) { |
d6f24d0f | 2492 | kfree(intel_dp->edid); |
bd943159 KP |
2493 | cancel_delayed_work_sync(&intel_dp->panel_vdd_work); |
2494 | ironlake_panel_vdd_off_sync(intel_dp); | |
2495 | } | |
24d05927 DV |
2496 | kfree(intel_dp); |
2497 | } | |
2498 | ||
a4fc5ed6 | 2499 | static const struct drm_encoder_helper_funcs intel_dp_helper_funcs = { |
a4fc5ed6 | 2500 | .mode_fixup = intel_dp_mode_fixup, |
a4fc5ed6 | 2501 | .mode_set = intel_dp_mode_set, |
1f703855 | 2502 | .disable = intel_encoder_noop, |
a4fc5ed6 KP |
2503 | }; |
2504 | ||
2505 | static const struct drm_connector_funcs intel_dp_connector_funcs = { | |
2bd2ad64 | 2506 | .dpms = intel_connector_dpms, |
a4fc5ed6 KP |
2507 | .detect = intel_dp_detect, |
2508 | .fill_modes = drm_helper_probe_single_connector_modes, | |
f684960e | 2509 | .set_property = intel_dp_set_property, |
a4fc5ed6 KP |
2510 | .destroy = intel_dp_destroy, |
2511 | }; | |
2512 | ||
2513 | static const struct drm_connector_helper_funcs intel_dp_connector_helper_funcs = { | |
2514 | .get_modes = intel_dp_get_modes, | |
2515 | .mode_valid = intel_dp_mode_valid, | |
df0e9248 | 2516 | .best_encoder = intel_best_encoder, |
a4fc5ed6 KP |
2517 | }; |
2518 | ||
a4fc5ed6 | 2519 | static const struct drm_encoder_funcs intel_dp_enc_funcs = { |
24d05927 | 2520 | .destroy = intel_dp_encoder_destroy, |
a4fc5ed6 KP |
2521 | }; |
2522 | ||
995b6762 | 2523 | static void |
21d40d37 | 2524 | intel_dp_hot_plug(struct intel_encoder *intel_encoder) |
c8110e52 | 2525 | { |
ea5b213a | 2526 | struct intel_dp *intel_dp = container_of(intel_encoder, struct intel_dp, base); |
c8110e52 | 2527 | |
885a5014 | 2528 | intel_dp_check_link_status(intel_dp); |
c8110e52 | 2529 | } |
6207937d | 2530 | |
e3421a18 ZW |
2531 | /* Return which DP Port should be selected for Transcoder DP control */ |
2532 | int | |
0206e353 | 2533 | intel_trans_dp_port_sel(struct drm_crtc *crtc) |
e3421a18 ZW |
2534 | { |
2535 | struct drm_device *dev = crtc->dev; | |
6c2b7c12 | 2536 | struct intel_encoder *encoder; |
e3421a18 | 2537 | |
6c2b7c12 DV |
2538 | for_each_encoder_on_crtc(dev, crtc, encoder) { |
2539 | struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base); | |
e3421a18 | 2540 | |
417e822d KP |
2541 | if (intel_dp->base.type == INTEL_OUTPUT_DISPLAYPORT || |
2542 | intel_dp->base.type == INTEL_OUTPUT_EDP) | |
ea5b213a | 2543 | return intel_dp->output_reg; |
e3421a18 | 2544 | } |
ea5b213a | 2545 | |
e3421a18 ZW |
2546 | return -1; |
2547 | } | |
2548 | ||
36e83a18 | 2549 | /* check the VBT to see whether the eDP is on DP-D port */ |
cb0953d7 | 2550 | bool intel_dpd_is_edp(struct drm_device *dev) |
36e83a18 ZY |
2551 | { |
2552 | struct drm_i915_private *dev_priv = dev->dev_private; | |
2553 | struct child_device_config *p_child; | |
2554 | int i; | |
2555 | ||
2556 | if (!dev_priv->child_dev_num) | |
2557 | return false; | |
2558 | ||
2559 | for (i = 0; i < dev_priv->child_dev_num; i++) { | |
2560 | p_child = dev_priv->child_dev + i; | |
2561 | ||
2562 | if (p_child->dvo_port == PORT_IDPD && | |
2563 | p_child->device_type == DEVICE_TYPE_eDP) | |
2564 | return true; | |
2565 | } | |
2566 | return false; | |
2567 | } | |
2568 | ||
f684960e CW |
2569 | static void |
2570 | intel_dp_add_properties(struct intel_dp *intel_dp, struct drm_connector *connector) | |
2571 | { | |
3f43c48d | 2572 | intel_attach_force_audio_property(connector); |
e953fd7b | 2573 | intel_attach_broadcast_rgb_property(connector); |
f684960e CW |
2574 | } |
2575 | ||
a4fc5ed6 | 2576 | void |
ab9d7c30 | 2577 | intel_dp_init(struct drm_device *dev, int output_reg, enum port port) |
a4fc5ed6 KP |
2578 | { |
2579 | struct drm_i915_private *dev_priv = dev->dev_private; | |
2580 | struct drm_connector *connector; | |
ea5b213a | 2581 | struct intel_dp *intel_dp; |
21d40d37 | 2582 | struct intel_encoder *intel_encoder; |
55f78c43 | 2583 | struct intel_connector *intel_connector; |
5eb08b69 | 2584 | const char *name = NULL; |
b329530c | 2585 | int type; |
a4fc5ed6 | 2586 | |
ea5b213a CW |
2587 | intel_dp = kzalloc(sizeof(struct intel_dp), GFP_KERNEL); |
2588 | if (!intel_dp) | |
a4fc5ed6 KP |
2589 | return; |
2590 | ||
3d3dc149 | 2591 | intel_dp->output_reg = output_reg; |
ab9d7c30 | 2592 | intel_dp->port = port; |
0767935e DV |
2593 | /* Preserve the current hw state. */ |
2594 | intel_dp->DP = I915_READ(intel_dp->output_reg); | |
3d3dc149 | 2595 | |
55f78c43 ZW |
2596 | intel_connector = kzalloc(sizeof(struct intel_connector), GFP_KERNEL); |
2597 | if (!intel_connector) { | |
ea5b213a | 2598 | kfree(intel_dp); |
55f78c43 ZW |
2599 | return; |
2600 | } | |
ea5b213a | 2601 | intel_encoder = &intel_dp->base; |
55f78c43 | 2602 | |
ea5b213a | 2603 | if (HAS_PCH_SPLIT(dev) && output_reg == PCH_DP_D) |
b329530c | 2604 | if (intel_dpd_is_edp(dev)) |
ea5b213a | 2605 | intel_dp->is_pch_edp = true; |
b329530c | 2606 | |
19c03924 GB |
2607 | /* |
2608 | * FIXME : We need to initialize built-in panels before external panels. | |
2609 | * For X0, DP_C is fixed as eDP. Revisit this as part of VLV eDP cleanup | |
2610 | */ | |
2611 | if (IS_VALLEYVIEW(dev) && output_reg == DP_C) { | |
2612 | type = DRM_MODE_CONNECTOR_eDP; | |
2613 | intel_encoder->type = INTEL_OUTPUT_EDP; | |
2614 | } else if (output_reg == DP_A || is_pch_edp(intel_dp)) { | |
b329530c AJ |
2615 | type = DRM_MODE_CONNECTOR_eDP; |
2616 | intel_encoder->type = INTEL_OUTPUT_EDP; | |
2617 | } else { | |
2618 | type = DRM_MODE_CONNECTOR_DisplayPort; | |
2619 | intel_encoder->type = INTEL_OUTPUT_DISPLAYPORT; | |
2620 | } | |
2621 | ||
55f78c43 | 2622 | connector = &intel_connector->base; |
b329530c | 2623 | drm_connector_init(dev, connector, &intel_dp_connector_funcs, type); |
a4fc5ed6 KP |
2624 | drm_connector_helper_add(connector, &intel_dp_connector_helper_funcs); |
2625 | ||
eb1f8e4f DA |
2626 | connector->polled = DRM_CONNECTOR_POLL_HPD; |
2627 | ||
66a9278e | 2628 | intel_encoder->cloneable = false; |
f8aed700 | 2629 | |
66a9278e DV |
2630 | INIT_DELAYED_WORK(&intel_dp->panel_vdd_work, |
2631 | ironlake_panel_vdd_work); | |
6251ec0a | 2632 | |
27f8227b | 2633 | intel_encoder->crtc_mask = (1 << 0) | (1 << 1) | (1 << 2); |
ee7b9f93 | 2634 | |
a4fc5ed6 KP |
2635 | connector->interlace_allowed = true; |
2636 | connector->doublescan_allowed = 0; | |
2637 | ||
4ef69c7a | 2638 | drm_encoder_init(dev, &intel_encoder->base, &intel_dp_enc_funcs, |
a4fc5ed6 | 2639 | DRM_MODE_ENCODER_TMDS); |
4ef69c7a | 2640 | drm_encoder_helper_add(&intel_encoder->base, &intel_dp_helper_funcs); |
a4fc5ed6 | 2641 | |
df0e9248 | 2642 | intel_connector_attach_encoder(intel_connector, intel_encoder); |
a4fc5ed6 KP |
2643 | drm_sysfs_connector_add(connector); |
2644 | ||
e8cb4558 | 2645 | intel_encoder->enable = intel_enable_dp; |
2bd2ad64 | 2646 | intel_encoder->pre_enable = intel_pre_enable_dp; |
e8cb4558 | 2647 | intel_encoder->disable = intel_disable_dp; |
2bd2ad64 | 2648 | intel_encoder->post_disable = intel_post_disable_dp; |
19d8fe15 DV |
2649 | intel_encoder->get_hw_state = intel_dp_get_hw_state; |
2650 | intel_connector->get_hw_state = intel_connector_get_hw_state; | |
e8cb4558 | 2651 | |
a4fc5ed6 | 2652 | /* Set up the DDC bus. */ |
ab9d7c30 PZ |
2653 | switch (port) { |
2654 | case PORT_A: | |
2655 | name = "DPDDC-A"; | |
2656 | break; | |
2657 | case PORT_B: | |
2658 | dev_priv->hotplug_supported_mask |= DPB_HOTPLUG_INT_STATUS; | |
2659 | name = "DPDDC-B"; | |
2660 | break; | |
2661 | case PORT_C: | |
2662 | dev_priv->hotplug_supported_mask |= DPC_HOTPLUG_INT_STATUS; | |
2663 | name = "DPDDC-C"; | |
2664 | break; | |
2665 | case PORT_D: | |
2666 | dev_priv->hotplug_supported_mask |= DPD_HOTPLUG_INT_STATUS; | |
2667 | name = "DPDDC-D"; | |
2668 | break; | |
2669 | default: | |
2670 | WARN(1, "Invalid port %c\n", port_name(port)); | |
2671 | break; | |
5eb08b69 ZW |
2672 | } |
2673 | ||
89667383 JB |
2674 | /* Cache some DPCD data in the eDP case */ |
2675 | if (is_edp(intel_dp)) { | |
f01eca2e KP |
2676 | struct edp_power_seq cur, vbt; |
2677 | u32 pp_on, pp_off, pp_div; | |
5d613501 JB |
2678 | |
2679 | pp_on = I915_READ(PCH_PP_ON_DELAYS); | |
f01eca2e | 2680 | pp_off = I915_READ(PCH_PP_OFF_DELAYS); |
5d613501 | 2681 | pp_div = I915_READ(PCH_PP_DIVISOR); |
89667383 | 2682 | |
bfa3384a JB |
2683 | if (!pp_on || !pp_off || !pp_div) { |
2684 | DRM_INFO("bad panel power sequencing delays, disabling panel\n"); | |
2685 | intel_dp_encoder_destroy(&intel_dp->base.base); | |
2686 | intel_dp_destroy(&intel_connector->base); | |
2687 | return; | |
2688 | } | |
2689 | ||
f01eca2e KP |
2690 | /* Pull timing values out of registers */ |
2691 | cur.t1_t3 = (pp_on & PANEL_POWER_UP_DELAY_MASK) >> | |
2692 | PANEL_POWER_UP_DELAY_SHIFT; | |
2693 | ||
2694 | cur.t8 = (pp_on & PANEL_LIGHT_ON_DELAY_MASK) >> | |
2695 | PANEL_LIGHT_ON_DELAY_SHIFT; | |
f2e8b18a | 2696 | |
f01eca2e KP |
2697 | cur.t9 = (pp_off & PANEL_LIGHT_OFF_DELAY_MASK) >> |
2698 | PANEL_LIGHT_OFF_DELAY_SHIFT; | |
2699 | ||
2700 | cur.t10 = (pp_off & PANEL_POWER_DOWN_DELAY_MASK) >> | |
2701 | PANEL_POWER_DOWN_DELAY_SHIFT; | |
2702 | ||
2703 | cur.t11_t12 = ((pp_div & PANEL_POWER_CYCLE_DELAY_MASK) >> | |
2704 | PANEL_POWER_CYCLE_DELAY_SHIFT) * 1000; | |
2705 | ||
2706 | DRM_DEBUG_KMS("cur t1_t3 %d t8 %d t9 %d t10 %d t11_t12 %d\n", | |
2707 | cur.t1_t3, cur.t8, cur.t9, cur.t10, cur.t11_t12); | |
2708 | ||
2709 | vbt = dev_priv->edp.pps; | |
2710 | ||
2711 | DRM_DEBUG_KMS("vbt t1_t3 %d t8 %d t9 %d t10 %d t11_t12 %d\n", | |
2712 | vbt.t1_t3, vbt.t8, vbt.t9, vbt.t10, vbt.t11_t12); | |
2713 | ||
2714 | #define get_delay(field) ((max(cur.field, vbt.field) + 9) / 10) | |
2715 | ||
2716 | intel_dp->panel_power_up_delay = get_delay(t1_t3); | |
2717 | intel_dp->backlight_on_delay = get_delay(t8); | |
2718 | intel_dp->backlight_off_delay = get_delay(t9); | |
2719 | intel_dp->panel_power_down_delay = get_delay(t10); | |
2720 | intel_dp->panel_power_cycle_delay = get_delay(t11_t12); | |
2721 | ||
2722 | DRM_DEBUG_KMS("panel power up delay %d, power down delay %d, power cycle delay %d\n", | |
2723 | intel_dp->panel_power_up_delay, intel_dp->panel_power_down_delay, | |
2724 | intel_dp->panel_power_cycle_delay); | |
2725 | ||
2726 | DRM_DEBUG_KMS("backlight on delay %d, off delay %d\n", | |
2727 | intel_dp->backlight_on_delay, intel_dp->backlight_off_delay); | |
c1f05264 DA |
2728 | } |
2729 | ||
2730 | intel_dp_i2c_init(intel_dp, intel_connector, name); | |
2731 | ||
2732 | if (is_edp(intel_dp)) { | |
2733 | bool ret; | |
2734 | struct edid *edid; | |
5d613501 JB |
2735 | |
2736 | ironlake_edp_panel_vdd_on(intel_dp); | |
59f3e272 | 2737 | ret = intel_dp_get_dpcd(intel_dp); |
bd943159 | 2738 | ironlake_edp_panel_vdd_off(intel_dp, false); |
99ea7127 | 2739 | |
59f3e272 | 2740 | if (ret) { |
7183dc29 JB |
2741 | if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11) |
2742 | dev_priv->no_aux_handshake = | |
2743 | intel_dp->dpcd[DP_MAX_DOWNSPREAD] & | |
89667383 JB |
2744 | DP_NO_AUX_HANDSHAKE_LINK_TRAINING; |
2745 | } else { | |
3d3dc149 | 2746 | /* if this fails, presume the device is a ghost */ |
48898b03 | 2747 | DRM_INFO("failed to retrieve link info, disabling eDP\n"); |
3d3dc149 | 2748 | intel_dp_encoder_destroy(&intel_dp->base.base); |
48898b03 | 2749 | intel_dp_destroy(&intel_connector->base); |
3d3dc149 | 2750 | return; |
89667383 | 2751 | } |
89667383 | 2752 | |
d6f24d0f JB |
2753 | ironlake_edp_panel_vdd_on(intel_dp); |
2754 | edid = drm_get_edid(connector, &intel_dp->adapter); | |
2755 | if (edid) { | |
2756 | drm_mode_connector_update_edid_property(connector, | |
2757 | edid); | |
2758 | intel_dp->edid_mode_count = | |
2759 | drm_add_edid_modes(connector, edid); | |
2760 | drm_edid_to_eld(connector, edid); | |
2761 | intel_dp->edid = edid; | |
2762 | } | |
2763 | ironlake_edp_panel_vdd_off(intel_dp, false); | |
2764 | } | |
552fb0b7 | 2765 | |
21d40d37 | 2766 | intel_encoder->hot_plug = intel_dp_hot_plug; |
a4fc5ed6 | 2767 | |
4d926461 | 2768 | if (is_edp(intel_dp)) { |
aaa6fd2a MG |
2769 | dev_priv->int_edp_connector = connector; |
2770 | intel_panel_setup_backlight(dev); | |
32f9d658 ZW |
2771 | } |
2772 | ||
f684960e CW |
2773 | intel_dp_add_properties(intel_dp, connector); |
2774 | ||
a4fc5ed6 KP |
2775 | /* For G4X desktop chip, PEG_BAND_GAP_DATA 3:0 must first be written |
2776 | * 0xd. Failure to do so will result in spurious interrupts being | |
2777 | * generated on the port when a cable is not attached. | |
2778 | */ | |
2779 | if (IS_G4X(dev) && !IS_GM45(dev)) { | |
2780 | u32 temp = I915_READ(PEG_BAND_GAP_DATA); | |
2781 | I915_WRITE(PEG_BAND_GAP_DATA, (temp & ~0xf) | 0xd); | |
2782 | } | |
2783 | } |