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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> |
760285e7 DH |
31 | #include <drm/drmP.h> |
32 | #include <drm/drm_crtc.h> | |
33 | #include <drm/drm_crtc_helper.h> | |
34 | #include <drm/drm_edid.h> | |
a4fc5ed6 | 35 | #include "intel_drv.h" |
760285e7 | 36 | #include <drm/i915_drm.h> |
a4fc5ed6 | 37 | #include "i915_drv.h" |
a4fc5ed6 | 38 | |
a4fc5ed6 KP |
39 | #define DP_LINK_CHECK_TIMEOUT (10 * 1000) |
40 | ||
cfcb0fc9 JB |
41 | /** |
42 | * is_edp - is the given port attached to an eDP panel (either CPU or PCH) | |
43 | * @intel_dp: DP struct | |
44 | * | |
45 | * If a CPU or PCH DP output is attached to an eDP panel, this function | |
46 | * will return true, and false otherwise. | |
47 | */ | |
48 | static bool is_edp(struct intel_dp *intel_dp) | |
49 | { | |
50 | return intel_dp->base.type == INTEL_OUTPUT_EDP; | |
51 | } | |
52 | ||
53 | /** | |
54 | * is_pch_edp - is the port on the PCH and attached to an eDP panel? | |
55 | * @intel_dp: DP struct | |
56 | * | |
57 | * Returns true if the given DP struct corresponds to a PCH DP port attached | |
58 | * to an eDP panel, false otherwise. Helpful for determining whether we | |
59 | * may need FDI resources for a given DP output or not. | |
60 | */ | |
61 | static bool is_pch_edp(struct intel_dp *intel_dp) | |
62 | { | |
63 | return intel_dp->is_pch_edp; | |
64 | } | |
65 | ||
1c95822a AJ |
66 | /** |
67 | * is_cpu_edp - is the port on the CPU and attached to an eDP panel? | |
68 | * @intel_dp: DP struct | |
69 | * | |
70 | * Returns true if the given DP struct corresponds to a CPU eDP port. | |
71 | */ | |
72 | static bool is_cpu_edp(struct intel_dp *intel_dp) | |
73 | { | |
74 | return is_edp(intel_dp) && !is_pch_edp(intel_dp); | |
75 | } | |
76 | ||
df0e9248 CW |
77 | static struct intel_dp *intel_attached_dp(struct drm_connector *connector) |
78 | { | |
79 | return container_of(intel_attached_encoder(connector), | |
80 | struct intel_dp, base); | |
81 | } | |
82 | ||
814948ad JB |
83 | /** |
84 | * intel_encoder_is_pch_edp - is the given encoder a PCH attached eDP? | |
85 | * @encoder: DRM encoder | |
86 | * | |
87 | * Return true if @encoder corresponds to a PCH attached eDP panel. Needed | |
88 | * by intel_display.c. | |
89 | */ | |
90 | bool intel_encoder_is_pch_edp(struct drm_encoder *encoder) | |
91 | { | |
92 | struct intel_dp *intel_dp; | |
93 | ||
94 | if (!encoder) | |
95 | return false; | |
96 | ||
97 | intel_dp = enc_to_intel_dp(encoder); | |
98 | ||
99 | return is_pch_edp(intel_dp); | |
100 | } | |
101 | ||
ea5b213a | 102 | static void intel_dp_link_down(struct intel_dp *intel_dp); |
a4fc5ed6 | 103 | |
32f9d658 | 104 | void |
0206e353 | 105 | intel_edp_link_config(struct intel_encoder *intel_encoder, |
ea5b213a | 106 | int *lane_num, int *link_bw) |
32f9d658 | 107 | { |
ea5b213a | 108 | struct intel_dp *intel_dp = container_of(intel_encoder, struct intel_dp, base); |
32f9d658 | 109 | |
ea5b213a | 110 | *lane_num = intel_dp->lane_count; |
3b5c662e | 111 | *link_bw = drm_dp_bw_code_to_link_rate(intel_dp->link_bw); |
32f9d658 ZW |
112 | } |
113 | ||
94bf2ced DV |
114 | int |
115 | intel_edp_target_clock(struct intel_encoder *intel_encoder, | |
116 | struct drm_display_mode *mode) | |
117 | { | |
118 | struct intel_dp *intel_dp = container_of(intel_encoder, struct intel_dp, base); | |
dd06f90e | 119 | struct intel_connector *intel_connector = intel_dp->attached_connector; |
94bf2ced | 120 | |
dd06f90e JN |
121 | if (intel_connector->panel.fixed_mode) |
122 | return intel_connector->panel.fixed_mode->clock; | |
94bf2ced DV |
123 | else |
124 | return mode->clock; | |
125 | } | |
126 | ||
a4fc5ed6 | 127 | static int |
ea5b213a | 128 | intel_dp_max_link_bw(struct intel_dp *intel_dp) |
a4fc5ed6 | 129 | { |
7183dc29 | 130 | int max_link_bw = intel_dp->dpcd[DP_MAX_LINK_RATE]; |
a4fc5ed6 KP |
131 | |
132 | switch (max_link_bw) { | |
133 | case DP_LINK_BW_1_62: | |
134 | case DP_LINK_BW_2_7: | |
135 | break; | |
136 | default: | |
137 | max_link_bw = DP_LINK_BW_1_62; | |
138 | break; | |
139 | } | |
140 | return max_link_bw; | |
141 | } | |
142 | ||
143 | static int | |
144 | intel_dp_link_clock(uint8_t link_bw) | |
145 | { | |
146 | if (link_bw == DP_LINK_BW_2_7) | |
147 | return 270000; | |
148 | else | |
149 | return 162000; | |
150 | } | |
151 | ||
cd9dde44 AJ |
152 | /* |
153 | * The units on the numbers in the next two are... bizarre. Examples will | |
154 | * make it clearer; this one parallels an example in the eDP spec. | |
155 | * | |
156 | * intel_dp_max_data_rate for one lane of 2.7GHz evaluates as: | |
157 | * | |
158 | * 270000 * 1 * 8 / 10 == 216000 | |
159 | * | |
160 | * The actual data capacity of that configuration is 2.16Gbit/s, so the | |
161 | * units are decakilobits. ->clock in a drm_display_mode is in kilohertz - | |
162 | * or equivalently, kilopixels per second - so for 1680x1050R it'd be | |
163 | * 119000. At 18bpp that's 2142000 kilobits per second. | |
164 | * | |
165 | * Thus the strange-looking division by 10 in intel_dp_link_required, to | |
166 | * get the result in decakilobits instead of kilobits. | |
167 | */ | |
168 | ||
a4fc5ed6 | 169 | static int |
c898261c | 170 | intel_dp_link_required(int pixel_clock, int bpp) |
a4fc5ed6 | 171 | { |
cd9dde44 | 172 | return (pixel_clock * bpp + 9) / 10; |
a4fc5ed6 KP |
173 | } |
174 | ||
fe27d53e DA |
175 | static int |
176 | intel_dp_max_data_rate(int max_link_clock, int max_lanes) | |
177 | { | |
178 | return (max_link_clock * max_lanes * 8) / 10; | |
179 | } | |
180 | ||
c4867936 DV |
181 | static bool |
182 | intel_dp_adjust_dithering(struct intel_dp *intel_dp, | |
183 | struct drm_display_mode *mode, | |
cb1793ce | 184 | bool adjust_mode) |
c4867936 DV |
185 | { |
186 | int max_link_clock = intel_dp_link_clock(intel_dp_max_link_bw(intel_dp)); | |
397fe157 | 187 | int max_lanes = drm_dp_max_lane_count(intel_dp->dpcd); |
c4867936 DV |
188 | int max_rate, mode_rate; |
189 | ||
190 | mode_rate = intel_dp_link_required(mode->clock, 24); | |
191 | max_rate = intel_dp_max_data_rate(max_link_clock, max_lanes); | |
192 | ||
193 | if (mode_rate > max_rate) { | |
194 | mode_rate = intel_dp_link_required(mode->clock, 18); | |
195 | if (mode_rate > max_rate) | |
196 | return false; | |
197 | ||
cb1793ce DV |
198 | if (adjust_mode) |
199 | mode->private_flags | |
c4867936 DV |
200 | |= INTEL_MODE_DP_FORCE_6BPC; |
201 | ||
202 | return true; | |
203 | } | |
204 | ||
205 | return true; | |
206 | } | |
207 | ||
a4fc5ed6 KP |
208 | static int |
209 | intel_dp_mode_valid(struct drm_connector *connector, | |
210 | struct drm_display_mode *mode) | |
211 | { | |
df0e9248 | 212 | struct intel_dp *intel_dp = intel_attached_dp(connector); |
dd06f90e JN |
213 | struct intel_connector *intel_connector = to_intel_connector(connector); |
214 | struct drm_display_mode *fixed_mode = intel_connector->panel.fixed_mode; | |
a4fc5ed6 | 215 | |
dd06f90e JN |
216 | if (is_edp(intel_dp) && fixed_mode) { |
217 | if (mode->hdisplay > fixed_mode->hdisplay) | |
7de56f43 ZY |
218 | return MODE_PANEL; |
219 | ||
dd06f90e | 220 | if (mode->vdisplay > fixed_mode->vdisplay) |
7de56f43 ZY |
221 | return MODE_PANEL; |
222 | } | |
223 | ||
cb1793ce | 224 | if (!intel_dp_adjust_dithering(intel_dp, mode, false)) |
c4867936 | 225 | return MODE_CLOCK_HIGH; |
a4fc5ed6 KP |
226 | |
227 | if (mode->clock < 10000) | |
228 | return MODE_CLOCK_LOW; | |
229 | ||
0af78a2b DV |
230 | if (mode->flags & DRM_MODE_FLAG_DBLCLK) |
231 | return MODE_H_ILLEGAL; | |
232 | ||
a4fc5ed6 KP |
233 | return MODE_OK; |
234 | } | |
235 | ||
236 | static uint32_t | |
237 | pack_aux(uint8_t *src, int src_bytes) | |
238 | { | |
239 | int i; | |
240 | uint32_t v = 0; | |
241 | ||
242 | if (src_bytes > 4) | |
243 | src_bytes = 4; | |
244 | for (i = 0; i < src_bytes; i++) | |
245 | v |= ((uint32_t) src[i]) << ((3-i) * 8); | |
246 | return v; | |
247 | } | |
248 | ||
249 | static void | |
250 | unpack_aux(uint32_t src, uint8_t *dst, int dst_bytes) | |
251 | { | |
252 | int i; | |
253 | if (dst_bytes > 4) | |
254 | dst_bytes = 4; | |
255 | for (i = 0; i < dst_bytes; i++) | |
256 | dst[i] = src >> ((3-i) * 8); | |
257 | } | |
258 | ||
fb0f8fbf KP |
259 | /* hrawclock is 1/4 the FSB frequency */ |
260 | static int | |
261 | intel_hrawclk(struct drm_device *dev) | |
262 | { | |
263 | struct drm_i915_private *dev_priv = dev->dev_private; | |
264 | uint32_t clkcfg; | |
265 | ||
9473c8f4 VP |
266 | /* There is no CLKCFG reg in Valleyview. VLV hrawclk is 200 MHz */ |
267 | if (IS_VALLEYVIEW(dev)) | |
268 | return 200; | |
269 | ||
fb0f8fbf KP |
270 | clkcfg = I915_READ(CLKCFG); |
271 | switch (clkcfg & CLKCFG_FSB_MASK) { | |
272 | case CLKCFG_FSB_400: | |
273 | return 100; | |
274 | case CLKCFG_FSB_533: | |
275 | return 133; | |
276 | case CLKCFG_FSB_667: | |
277 | return 166; | |
278 | case CLKCFG_FSB_800: | |
279 | return 200; | |
280 | case CLKCFG_FSB_1067: | |
281 | return 266; | |
282 | case CLKCFG_FSB_1333: | |
283 | return 333; | |
284 | /* these two are just a guess; one of them might be right */ | |
285 | case CLKCFG_FSB_1600: | |
286 | case CLKCFG_FSB_1600_ALT: | |
287 | return 400; | |
288 | default: | |
289 | return 133; | |
290 | } | |
291 | } | |
292 | ||
ebf33b18 KP |
293 | static bool ironlake_edp_have_panel_power(struct intel_dp *intel_dp) |
294 | { | |
295 | struct drm_device *dev = intel_dp->base.base.dev; | |
296 | struct drm_i915_private *dev_priv = dev->dev_private; | |
297 | ||
298 | return (I915_READ(PCH_PP_STATUS) & PP_ON) != 0; | |
299 | } | |
300 | ||
301 | static bool ironlake_edp_have_panel_vdd(struct intel_dp *intel_dp) | |
302 | { | |
303 | struct drm_device *dev = intel_dp->base.base.dev; | |
304 | struct drm_i915_private *dev_priv = dev->dev_private; | |
305 | ||
306 | return (I915_READ(PCH_PP_CONTROL) & EDP_FORCE_VDD) != 0; | |
307 | } | |
308 | ||
9b984dae KP |
309 | static void |
310 | intel_dp_check_edp(struct intel_dp *intel_dp) | |
311 | { | |
312 | struct drm_device *dev = intel_dp->base.base.dev; | |
313 | struct drm_i915_private *dev_priv = dev->dev_private; | |
ebf33b18 | 314 | |
9b984dae KP |
315 | if (!is_edp(intel_dp)) |
316 | return; | |
ebf33b18 | 317 | if (!ironlake_edp_have_panel_power(intel_dp) && !ironlake_edp_have_panel_vdd(intel_dp)) { |
9b984dae KP |
318 | WARN(1, "eDP powered off while attempting aux channel communication.\n"); |
319 | DRM_DEBUG_KMS("Status 0x%08x Control 0x%08x\n", | |
ebf33b18 | 320 | I915_READ(PCH_PP_STATUS), |
9b984dae KP |
321 | I915_READ(PCH_PP_CONTROL)); |
322 | } | |
323 | } | |
324 | ||
a4fc5ed6 | 325 | static int |
ea5b213a | 326 | intel_dp_aux_ch(struct intel_dp *intel_dp, |
a4fc5ed6 KP |
327 | uint8_t *send, int send_bytes, |
328 | uint8_t *recv, int recv_size) | |
329 | { | |
ea5b213a | 330 | uint32_t output_reg = intel_dp->output_reg; |
4ef69c7a | 331 | struct drm_device *dev = intel_dp->base.base.dev; |
a4fc5ed6 KP |
332 | struct drm_i915_private *dev_priv = dev->dev_private; |
333 | uint32_t ch_ctl = output_reg + 0x10; | |
334 | uint32_t ch_data = ch_ctl + 4; | |
335 | int i; | |
336 | int recv_bytes; | |
a4fc5ed6 | 337 | uint32_t status; |
fb0f8fbf | 338 | uint32_t aux_clock_divider; |
6b4e0a93 | 339 | int try, precharge; |
a4fc5ed6 | 340 | |
750eb99e PZ |
341 | if (IS_HASWELL(dev)) { |
342 | switch (intel_dp->port) { | |
343 | case PORT_A: | |
344 | ch_ctl = DPA_AUX_CH_CTL; | |
345 | ch_data = DPA_AUX_CH_DATA1; | |
346 | break; | |
347 | case PORT_B: | |
348 | ch_ctl = PCH_DPB_AUX_CH_CTL; | |
349 | ch_data = PCH_DPB_AUX_CH_DATA1; | |
350 | break; | |
351 | case PORT_C: | |
352 | ch_ctl = PCH_DPC_AUX_CH_CTL; | |
353 | ch_data = PCH_DPC_AUX_CH_DATA1; | |
354 | break; | |
355 | case PORT_D: | |
356 | ch_ctl = PCH_DPD_AUX_CH_CTL; | |
357 | ch_data = PCH_DPD_AUX_CH_DATA1; | |
358 | break; | |
359 | default: | |
360 | BUG(); | |
361 | } | |
362 | } | |
363 | ||
9b984dae | 364 | intel_dp_check_edp(intel_dp); |
a4fc5ed6 | 365 | /* The clock divider is based off the hrawclk, |
fb0f8fbf KP |
366 | * and would like to run at 2MHz. So, take the |
367 | * hrawclk value and divide by 2 and use that | |
6176b8f9 JB |
368 | * |
369 | * Note that PCH attached eDP panels should use a 125MHz input | |
370 | * clock divider. | |
a4fc5ed6 | 371 | */ |
1c95822a | 372 | if (is_cpu_edp(intel_dp)) { |
9473c8f4 VP |
373 | if (IS_VALLEYVIEW(dev)) |
374 | aux_clock_divider = 100; | |
375 | else if (IS_GEN6(dev) || IS_GEN7(dev)) | |
1a2eb460 | 376 | aux_clock_divider = 200; /* SNB & IVB eDP input clock at 400Mhz */ |
e3421a18 ZW |
377 | else |
378 | aux_clock_divider = 225; /* eDP input clock at 450Mhz */ | |
379 | } else if (HAS_PCH_SPLIT(dev)) | |
6919132e | 380 | aux_clock_divider = 63; /* IRL input clock fixed at 125Mhz */ |
5eb08b69 ZW |
381 | else |
382 | aux_clock_divider = intel_hrawclk(dev) / 2; | |
383 | ||
6b4e0a93 DV |
384 | if (IS_GEN6(dev)) |
385 | precharge = 3; | |
386 | else | |
387 | precharge = 5; | |
388 | ||
11bee43e JB |
389 | /* Try to wait for any previous AUX channel activity */ |
390 | for (try = 0; try < 3; try++) { | |
391 | status = I915_READ(ch_ctl); | |
392 | if ((status & DP_AUX_CH_CTL_SEND_BUSY) == 0) | |
393 | break; | |
394 | msleep(1); | |
395 | } | |
396 | ||
397 | if (try == 3) { | |
398 | WARN(1, "dp_aux_ch not started status 0x%08x\n", | |
399 | I915_READ(ch_ctl)); | |
4f7f7b7e CW |
400 | return -EBUSY; |
401 | } | |
402 | ||
fb0f8fbf KP |
403 | /* Must try at least 3 times according to DP spec */ |
404 | for (try = 0; try < 5; try++) { | |
405 | /* Load the send data into the aux channel data registers */ | |
4f7f7b7e CW |
406 | for (i = 0; i < send_bytes; i += 4) |
407 | I915_WRITE(ch_data + i, | |
408 | pack_aux(send + i, send_bytes - i)); | |
0206e353 | 409 | |
fb0f8fbf | 410 | /* Send the command and wait for it to complete */ |
4f7f7b7e CW |
411 | I915_WRITE(ch_ctl, |
412 | DP_AUX_CH_CTL_SEND_BUSY | | |
413 | DP_AUX_CH_CTL_TIME_OUT_400us | | |
414 | (send_bytes << DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT) | | |
415 | (precharge << DP_AUX_CH_CTL_PRECHARGE_2US_SHIFT) | | |
416 | (aux_clock_divider << DP_AUX_CH_CTL_BIT_CLOCK_2X_SHIFT) | | |
417 | DP_AUX_CH_CTL_DONE | | |
418 | DP_AUX_CH_CTL_TIME_OUT_ERROR | | |
419 | DP_AUX_CH_CTL_RECEIVE_ERROR); | |
fb0f8fbf | 420 | for (;;) { |
fb0f8fbf KP |
421 | status = I915_READ(ch_ctl); |
422 | if ((status & DP_AUX_CH_CTL_SEND_BUSY) == 0) | |
423 | break; | |
4f7f7b7e | 424 | udelay(100); |
fb0f8fbf | 425 | } |
0206e353 | 426 | |
fb0f8fbf | 427 | /* Clear done status and any errors */ |
4f7f7b7e CW |
428 | I915_WRITE(ch_ctl, |
429 | status | | |
430 | DP_AUX_CH_CTL_DONE | | |
431 | DP_AUX_CH_CTL_TIME_OUT_ERROR | | |
432 | DP_AUX_CH_CTL_RECEIVE_ERROR); | |
d7e96fea AJ |
433 | |
434 | if (status & (DP_AUX_CH_CTL_TIME_OUT_ERROR | | |
435 | DP_AUX_CH_CTL_RECEIVE_ERROR)) | |
436 | continue; | |
4f7f7b7e | 437 | if (status & DP_AUX_CH_CTL_DONE) |
a4fc5ed6 KP |
438 | break; |
439 | } | |
440 | ||
a4fc5ed6 | 441 | if ((status & DP_AUX_CH_CTL_DONE) == 0) { |
1ae8c0a5 | 442 | DRM_ERROR("dp_aux_ch not done status 0x%08x\n", status); |
a5b3da54 | 443 | return -EBUSY; |
a4fc5ed6 KP |
444 | } |
445 | ||
446 | /* Check for timeout or receive error. | |
447 | * Timeouts occur when the sink is not connected | |
448 | */ | |
a5b3da54 | 449 | if (status & DP_AUX_CH_CTL_RECEIVE_ERROR) { |
1ae8c0a5 | 450 | DRM_ERROR("dp_aux_ch receive error status 0x%08x\n", status); |
a5b3da54 KP |
451 | return -EIO; |
452 | } | |
1ae8c0a5 KP |
453 | |
454 | /* Timeouts occur when the device isn't connected, so they're | |
455 | * "normal" -- don't fill the kernel log with these */ | |
a5b3da54 | 456 | if (status & DP_AUX_CH_CTL_TIME_OUT_ERROR) { |
28c97730 | 457 | DRM_DEBUG_KMS("dp_aux_ch timeout status 0x%08x\n", status); |
a5b3da54 | 458 | return -ETIMEDOUT; |
a4fc5ed6 KP |
459 | } |
460 | ||
461 | /* Unload any bytes sent back from the other side */ | |
462 | recv_bytes = ((status & DP_AUX_CH_CTL_MESSAGE_SIZE_MASK) >> | |
463 | DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT); | |
a4fc5ed6 KP |
464 | if (recv_bytes > recv_size) |
465 | recv_bytes = recv_size; | |
0206e353 | 466 | |
4f7f7b7e CW |
467 | for (i = 0; i < recv_bytes; i += 4) |
468 | unpack_aux(I915_READ(ch_data + i), | |
469 | recv + i, recv_bytes - i); | |
a4fc5ed6 KP |
470 | |
471 | return recv_bytes; | |
472 | } | |
473 | ||
474 | /* Write data to the aux channel in native mode */ | |
475 | static int | |
ea5b213a | 476 | intel_dp_aux_native_write(struct intel_dp *intel_dp, |
a4fc5ed6 KP |
477 | uint16_t address, uint8_t *send, int send_bytes) |
478 | { | |
479 | int ret; | |
480 | uint8_t msg[20]; | |
481 | int msg_bytes; | |
482 | uint8_t ack; | |
483 | ||
9b984dae | 484 | intel_dp_check_edp(intel_dp); |
a4fc5ed6 KP |
485 | if (send_bytes > 16) |
486 | return -1; | |
487 | msg[0] = AUX_NATIVE_WRITE << 4; | |
488 | msg[1] = address >> 8; | |
eebc863e | 489 | msg[2] = address & 0xff; |
a4fc5ed6 KP |
490 | msg[3] = send_bytes - 1; |
491 | memcpy(&msg[4], send, send_bytes); | |
492 | msg_bytes = send_bytes + 4; | |
493 | for (;;) { | |
ea5b213a | 494 | ret = intel_dp_aux_ch(intel_dp, msg, msg_bytes, &ack, 1); |
a4fc5ed6 KP |
495 | if (ret < 0) |
496 | return ret; | |
497 | if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_ACK) | |
498 | break; | |
499 | else if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_DEFER) | |
500 | udelay(100); | |
501 | else | |
a5b3da54 | 502 | return -EIO; |
a4fc5ed6 KP |
503 | } |
504 | return send_bytes; | |
505 | } | |
506 | ||
507 | /* Write a single byte to the aux channel in native mode */ | |
508 | static int | |
ea5b213a | 509 | intel_dp_aux_native_write_1(struct intel_dp *intel_dp, |
a4fc5ed6 KP |
510 | uint16_t address, uint8_t byte) |
511 | { | |
ea5b213a | 512 | return intel_dp_aux_native_write(intel_dp, address, &byte, 1); |
a4fc5ed6 KP |
513 | } |
514 | ||
515 | /* read bytes from a native aux channel */ | |
516 | static int | |
ea5b213a | 517 | intel_dp_aux_native_read(struct intel_dp *intel_dp, |
a4fc5ed6 KP |
518 | uint16_t address, uint8_t *recv, int recv_bytes) |
519 | { | |
520 | uint8_t msg[4]; | |
521 | int msg_bytes; | |
522 | uint8_t reply[20]; | |
523 | int reply_bytes; | |
524 | uint8_t ack; | |
525 | int ret; | |
526 | ||
9b984dae | 527 | intel_dp_check_edp(intel_dp); |
a4fc5ed6 KP |
528 | msg[0] = AUX_NATIVE_READ << 4; |
529 | msg[1] = address >> 8; | |
530 | msg[2] = address & 0xff; | |
531 | msg[3] = recv_bytes - 1; | |
532 | ||
533 | msg_bytes = 4; | |
534 | reply_bytes = recv_bytes + 1; | |
535 | ||
536 | for (;;) { | |
ea5b213a | 537 | ret = intel_dp_aux_ch(intel_dp, msg, msg_bytes, |
a4fc5ed6 | 538 | reply, reply_bytes); |
a5b3da54 KP |
539 | if (ret == 0) |
540 | return -EPROTO; | |
541 | if (ret < 0) | |
a4fc5ed6 KP |
542 | return ret; |
543 | ack = reply[0]; | |
544 | if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_ACK) { | |
545 | memcpy(recv, reply + 1, ret - 1); | |
546 | return ret - 1; | |
547 | } | |
548 | else if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_DEFER) | |
549 | udelay(100); | |
550 | else | |
a5b3da54 | 551 | return -EIO; |
a4fc5ed6 KP |
552 | } |
553 | } | |
554 | ||
555 | static int | |
ab2c0672 DA |
556 | intel_dp_i2c_aux_ch(struct i2c_adapter *adapter, int mode, |
557 | uint8_t write_byte, uint8_t *read_byte) | |
a4fc5ed6 | 558 | { |
ab2c0672 | 559 | struct i2c_algo_dp_aux_data *algo_data = adapter->algo_data; |
ea5b213a CW |
560 | struct intel_dp *intel_dp = container_of(adapter, |
561 | struct intel_dp, | |
562 | adapter); | |
ab2c0672 DA |
563 | uint16_t address = algo_data->address; |
564 | uint8_t msg[5]; | |
565 | uint8_t reply[2]; | |
8316f337 | 566 | unsigned retry; |
ab2c0672 DA |
567 | int msg_bytes; |
568 | int reply_bytes; | |
569 | int ret; | |
570 | ||
9b984dae | 571 | intel_dp_check_edp(intel_dp); |
ab2c0672 DA |
572 | /* Set up the command byte */ |
573 | if (mode & MODE_I2C_READ) | |
574 | msg[0] = AUX_I2C_READ << 4; | |
575 | else | |
576 | msg[0] = AUX_I2C_WRITE << 4; | |
577 | ||
578 | if (!(mode & MODE_I2C_STOP)) | |
579 | msg[0] |= AUX_I2C_MOT << 4; | |
a4fc5ed6 | 580 | |
ab2c0672 DA |
581 | msg[1] = address >> 8; |
582 | msg[2] = address; | |
583 | ||
584 | switch (mode) { | |
585 | case MODE_I2C_WRITE: | |
586 | msg[3] = 0; | |
587 | msg[4] = write_byte; | |
588 | msg_bytes = 5; | |
589 | reply_bytes = 1; | |
590 | break; | |
591 | case MODE_I2C_READ: | |
592 | msg[3] = 0; | |
593 | msg_bytes = 4; | |
594 | reply_bytes = 2; | |
595 | break; | |
596 | default: | |
597 | msg_bytes = 3; | |
598 | reply_bytes = 1; | |
599 | break; | |
600 | } | |
601 | ||
8316f337 DF |
602 | for (retry = 0; retry < 5; retry++) { |
603 | ret = intel_dp_aux_ch(intel_dp, | |
604 | msg, msg_bytes, | |
605 | reply, reply_bytes); | |
ab2c0672 | 606 | if (ret < 0) { |
3ff99164 | 607 | DRM_DEBUG_KMS("aux_ch failed %d\n", ret); |
ab2c0672 DA |
608 | return ret; |
609 | } | |
8316f337 DF |
610 | |
611 | switch (reply[0] & AUX_NATIVE_REPLY_MASK) { | |
612 | case AUX_NATIVE_REPLY_ACK: | |
613 | /* I2C-over-AUX Reply field is only valid | |
614 | * when paired with AUX ACK. | |
615 | */ | |
616 | break; | |
617 | case AUX_NATIVE_REPLY_NACK: | |
618 | DRM_DEBUG_KMS("aux_ch native nack\n"); | |
619 | return -EREMOTEIO; | |
620 | case AUX_NATIVE_REPLY_DEFER: | |
621 | udelay(100); | |
622 | continue; | |
623 | default: | |
624 | DRM_ERROR("aux_ch invalid native reply 0x%02x\n", | |
625 | reply[0]); | |
626 | return -EREMOTEIO; | |
627 | } | |
628 | ||
ab2c0672 DA |
629 | switch (reply[0] & AUX_I2C_REPLY_MASK) { |
630 | case AUX_I2C_REPLY_ACK: | |
631 | if (mode == MODE_I2C_READ) { | |
632 | *read_byte = reply[1]; | |
633 | } | |
634 | return reply_bytes - 1; | |
635 | case AUX_I2C_REPLY_NACK: | |
8316f337 | 636 | DRM_DEBUG_KMS("aux_i2c nack\n"); |
ab2c0672 DA |
637 | return -EREMOTEIO; |
638 | case AUX_I2C_REPLY_DEFER: | |
8316f337 | 639 | DRM_DEBUG_KMS("aux_i2c defer\n"); |
ab2c0672 DA |
640 | udelay(100); |
641 | break; | |
642 | default: | |
8316f337 | 643 | DRM_ERROR("aux_i2c invalid reply 0x%02x\n", reply[0]); |
ab2c0672 DA |
644 | return -EREMOTEIO; |
645 | } | |
646 | } | |
8316f337 DF |
647 | |
648 | DRM_ERROR("too many retries, giving up\n"); | |
649 | return -EREMOTEIO; | |
a4fc5ed6 KP |
650 | } |
651 | ||
0b5c541b | 652 | static void ironlake_edp_panel_vdd_on(struct intel_dp *intel_dp); |
bd943159 | 653 | static void ironlake_edp_panel_vdd_off(struct intel_dp *intel_dp, bool sync); |
0b5c541b | 654 | |
a4fc5ed6 | 655 | static int |
ea5b213a | 656 | intel_dp_i2c_init(struct intel_dp *intel_dp, |
55f78c43 | 657 | struct intel_connector *intel_connector, const char *name) |
a4fc5ed6 | 658 | { |
0b5c541b KP |
659 | int ret; |
660 | ||
d54e9d28 | 661 | DRM_DEBUG_KMS("i2c_init %s\n", name); |
ea5b213a CW |
662 | intel_dp->algo.running = false; |
663 | intel_dp->algo.address = 0; | |
664 | intel_dp->algo.aux_ch = intel_dp_i2c_aux_ch; | |
665 | ||
0206e353 | 666 | memset(&intel_dp->adapter, '\0', sizeof(intel_dp->adapter)); |
ea5b213a CW |
667 | intel_dp->adapter.owner = THIS_MODULE; |
668 | intel_dp->adapter.class = I2C_CLASS_DDC; | |
0206e353 | 669 | strncpy(intel_dp->adapter.name, name, sizeof(intel_dp->adapter.name) - 1); |
ea5b213a CW |
670 | intel_dp->adapter.name[sizeof(intel_dp->adapter.name) - 1] = '\0'; |
671 | intel_dp->adapter.algo_data = &intel_dp->algo; | |
672 | intel_dp->adapter.dev.parent = &intel_connector->base.kdev; | |
673 | ||
0b5c541b KP |
674 | ironlake_edp_panel_vdd_on(intel_dp); |
675 | ret = i2c_dp_aux_add_bus(&intel_dp->adapter); | |
bd943159 | 676 | ironlake_edp_panel_vdd_off(intel_dp, false); |
0b5c541b | 677 | return ret; |
a4fc5ed6 KP |
678 | } |
679 | ||
680 | static bool | |
e811f5ae LP |
681 | intel_dp_mode_fixup(struct drm_encoder *encoder, |
682 | const struct drm_display_mode *mode, | |
a4fc5ed6 KP |
683 | struct drm_display_mode *adjusted_mode) |
684 | { | |
0d3a1bee | 685 | struct drm_device *dev = encoder->dev; |
ea5b213a | 686 | struct intel_dp *intel_dp = enc_to_intel_dp(encoder); |
dd06f90e | 687 | struct intel_connector *intel_connector = intel_dp->attached_connector; |
a4fc5ed6 | 688 | int lane_count, clock; |
397fe157 | 689 | int max_lane_count = drm_dp_max_lane_count(intel_dp->dpcd); |
ea5b213a | 690 | int max_clock = intel_dp_max_link_bw(intel_dp) == DP_LINK_BW_2_7 ? 1 : 0; |
083f9560 | 691 | int bpp, mode_rate; |
a4fc5ed6 KP |
692 | static int bws[2] = { DP_LINK_BW_1_62, DP_LINK_BW_2_7 }; |
693 | ||
dd06f90e JN |
694 | if (is_edp(intel_dp) && intel_connector->panel.fixed_mode) { |
695 | intel_fixed_panel_mode(intel_connector->panel.fixed_mode, | |
696 | adjusted_mode); | |
1d8e1c75 CW |
697 | intel_pch_panel_fitting(dev, DRM_MODE_SCALE_FULLSCREEN, |
698 | mode, adjusted_mode); | |
0d3a1bee ZY |
699 | } |
700 | ||
cb1793ce | 701 | if (adjusted_mode->flags & DRM_MODE_FLAG_DBLCLK) |
0af78a2b DV |
702 | return false; |
703 | ||
083f9560 DV |
704 | DRM_DEBUG_KMS("DP link computation with max lane count %i " |
705 | "max bw %02x pixel clock %iKHz\n", | |
71244653 | 706 | max_lane_count, bws[max_clock], adjusted_mode->clock); |
083f9560 | 707 | |
cb1793ce | 708 | if (!intel_dp_adjust_dithering(intel_dp, adjusted_mode, true)) |
c4867936 DV |
709 | return false; |
710 | ||
711 | bpp = adjusted_mode->private_flags & INTEL_MODE_DP_FORCE_6BPC ? 18 : 24; | |
71244653 | 712 | mode_rate = intel_dp_link_required(adjusted_mode->clock, bpp); |
c4867936 | 713 | |
2514bc51 JB |
714 | for (clock = 0; clock <= max_clock; clock++) { |
715 | for (lane_count = 1; lane_count <= max_lane_count; lane_count <<= 1) { | |
fe27d53e | 716 | int link_avail = intel_dp_max_data_rate(intel_dp_link_clock(bws[clock]), lane_count); |
a4fc5ed6 | 717 | |
083f9560 | 718 | if (mode_rate <= link_avail) { |
ea5b213a CW |
719 | intel_dp->link_bw = bws[clock]; |
720 | intel_dp->lane_count = lane_count; | |
721 | adjusted_mode->clock = intel_dp_link_clock(intel_dp->link_bw); | |
083f9560 DV |
722 | DRM_DEBUG_KMS("DP link bw %02x lane " |
723 | "count %d clock %d bpp %d\n", | |
ea5b213a | 724 | intel_dp->link_bw, intel_dp->lane_count, |
083f9560 DV |
725 | adjusted_mode->clock, bpp); |
726 | DRM_DEBUG_KMS("DP link bw required %i available %i\n", | |
727 | mode_rate, link_avail); | |
a4fc5ed6 KP |
728 | return true; |
729 | } | |
730 | } | |
731 | } | |
fe27d53e | 732 | |
a4fc5ed6 KP |
733 | return false; |
734 | } | |
735 | ||
736 | struct intel_dp_m_n { | |
737 | uint32_t tu; | |
738 | uint32_t gmch_m; | |
739 | uint32_t gmch_n; | |
740 | uint32_t link_m; | |
741 | uint32_t link_n; | |
742 | }; | |
743 | ||
744 | static void | |
745 | intel_reduce_ratio(uint32_t *num, uint32_t *den) | |
746 | { | |
747 | while (*num > 0xffffff || *den > 0xffffff) { | |
748 | *num >>= 1; | |
749 | *den >>= 1; | |
750 | } | |
751 | } | |
752 | ||
753 | static void | |
36e83a18 | 754 | intel_dp_compute_m_n(int bpp, |
a4fc5ed6 KP |
755 | int nlanes, |
756 | int pixel_clock, | |
757 | int link_clock, | |
758 | struct intel_dp_m_n *m_n) | |
759 | { | |
760 | m_n->tu = 64; | |
36e83a18 | 761 | m_n->gmch_m = (pixel_clock * bpp) >> 3; |
a4fc5ed6 KP |
762 | m_n->gmch_n = link_clock * nlanes; |
763 | intel_reduce_ratio(&m_n->gmch_m, &m_n->gmch_n); | |
764 | m_n->link_m = pixel_clock; | |
765 | m_n->link_n = link_clock; | |
766 | intel_reduce_ratio(&m_n->link_m, &m_n->link_n); | |
767 | } | |
768 | ||
769 | void | |
770 | intel_dp_set_m_n(struct drm_crtc *crtc, struct drm_display_mode *mode, | |
771 | struct drm_display_mode *adjusted_mode) | |
772 | { | |
773 | struct drm_device *dev = crtc->dev; | |
6c2b7c12 | 774 | struct intel_encoder *encoder; |
a4fc5ed6 KP |
775 | struct drm_i915_private *dev_priv = dev->dev_private; |
776 | struct intel_crtc *intel_crtc = to_intel_crtc(crtc); | |
858fa035 | 777 | int lane_count = 4; |
a4fc5ed6 | 778 | struct intel_dp_m_n m_n; |
9db4a9c7 | 779 | int pipe = intel_crtc->pipe; |
a4fc5ed6 KP |
780 | |
781 | /* | |
21d40d37 | 782 | * Find the lane count in the intel_encoder private |
a4fc5ed6 | 783 | */ |
6c2b7c12 DV |
784 | for_each_encoder_on_crtc(dev, crtc, encoder) { |
785 | struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base); | |
a4fc5ed6 | 786 | |
9a10f401 KP |
787 | if (intel_dp->base.type == INTEL_OUTPUT_DISPLAYPORT || |
788 | intel_dp->base.type == INTEL_OUTPUT_EDP) | |
789 | { | |
ea5b213a | 790 | lane_count = intel_dp->lane_count; |
51190667 | 791 | break; |
a4fc5ed6 KP |
792 | } |
793 | } | |
794 | ||
795 | /* | |
796 | * Compute the GMCH and Link ratios. The '3' here is | |
797 | * the number of bytes_per_pixel post-LUT, which we always | |
798 | * set up for 8-bits of R/G/B, or 3 bytes total. | |
799 | */ | |
858fa035 | 800 | intel_dp_compute_m_n(intel_crtc->bpp, lane_count, |
a4fc5ed6 KP |
801 | mode->clock, adjusted_mode->clock, &m_n); |
802 | ||
1eb8dfec PZ |
803 | if (IS_HASWELL(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); | |
808 | } else if (HAS_PCH_SPLIT(dev)) { | |
7346bfa0 | 809 | I915_WRITE(TRANSDATA_M1(pipe), TU_SIZE(m_n.tu) | m_n.gmch_m); |
9db4a9c7 JB |
810 | I915_WRITE(TRANSDATA_N1(pipe), m_n.gmch_n); |
811 | I915_WRITE(TRANSDPLINK_M1(pipe), m_n.link_m); | |
812 | I915_WRITE(TRANSDPLINK_N1(pipe), m_n.link_n); | |
74a4dd2e VP |
813 | } else if (IS_VALLEYVIEW(dev)) { |
814 | I915_WRITE(PIPE_DATA_M1(pipe), TU_SIZE(m_n.tu) | m_n.gmch_m); | |
815 | I915_WRITE(PIPE_DATA_N1(pipe), m_n.gmch_n); | |
816 | I915_WRITE(PIPE_LINK_M1(pipe), m_n.link_m); | |
817 | I915_WRITE(PIPE_LINK_N1(pipe), m_n.link_n); | |
a4fc5ed6 | 818 | } else { |
9db4a9c7 | 819 | I915_WRITE(PIPE_GMCH_DATA_M(pipe), |
7346bfa0 | 820 | TU_SIZE(m_n.tu) | m_n.gmch_m); |
9db4a9c7 JB |
821 | I915_WRITE(PIPE_GMCH_DATA_N(pipe), m_n.gmch_n); |
822 | I915_WRITE(PIPE_DP_LINK_M(pipe), m_n.link_m); | |
823 | I915_WRITE(PIPE_DP_LINK_N(pipe), m_n.link_n); | |
a4fc5ed6 KP |
824 | } |
825 | } | |
826 | ||
247d89f6 PZ |
827 | void intel_dp_init_link_config(struct intel_dp *intel_dp) |
828 | { | |
829 | memset(intel_dp->link_configuration, 0, DP_LINK_CONFIGURATION_SIZE); | |
830 | intel_dp->link_configuration[0] = intel_dp->link_bw; | |
831 | intel_dp->link_configuration[1] = intel_dp->lane_count; | |
832 | intel_dp->link_configuration[8] = DP_SET_ANSI_8B10B; | |
833 | /* | |
834 | * Check for DPCD version > 1.1 and enhanced framing support | |
835 | */ | |
836 | if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11 && | |
837 | (intel_dp->dpcd[DP_MAX_LANE_COUNT] & DP_ENHANCED_FRAME_CAP)) { | |
838 | intel_dp->link_configuration[1] |= DP_LANE_COUNT_ENHANCED_FRAME_EN; | |
839 | } | |
840 | } | |
841 | ||
a4fc5ed6 KP |
842 | static void |
843 | intel_dp_mode_set(struct drm_encoder *encoder, struct drm_display_mode *mode, | |
844 | struct drm_display_mode *adjusted_mode) | |
845 | { | |
e3421a18 | 846 | struct drm_device *dev = encoder->dev; |
417e822d | 847 | struct drm_i915_private *dev_priv = dev->dev_private; |
ea5b213a | 848 | struct intel_dp *intel_dp = enc_to_intel_dp(encoder); |
4ef69c7a | 849 | struct drm_crtc *crtc = intel_dp->base.base.crtc; |
a4fc5ed6 KP |
850 | struct intel_crtc *intel_crtc = to_intel_crtc(crtc); |
851 | ||
417e822d | 852 | /* |
1a2eb460 | 853 | * There are four kinds of DP registers: |
417e822d KP |
854 | * |
855 | * IBX PCH | |
1a2eb460 KP |
856 | * SNB CPU |
857 | * IVB CPU | |
417e822d KP |
858 | * CPT PCH |
859 | * | |
860 | * IBX PCH and CPU are the same for almost everything, | |
861 | * except that the CPU DP PLL is configured in this | |
862 | * register | |
863 | * | |
864 | * CPT PCH is quite different, having many bits moved | |
865 | * to the TRANS_DP_CTL register instead. That | |
866 | * configuration happens (oddly) in ironlake_pch_enable | |
867 | */ | |
9c9e7927 | 868 | |
417e822d KP |
869 | /* Preserve the BIOS-computed detected bit. This is |
870 | * supposed to be read-only. | |
871 | */ | |
872 | intel_dp->DP = I915_READ(intel_dp->output_reg) & DP_DETECTED; | |
a4fc5ed6 | 873 | |
417e822d | 874 | /* Handle DP bits in common between all three register formats */ |
417e822d | 875 | intel_dp->DP |= DP_VOLTAGE_0_4 | DP_PRE_EMPHASIS_0; |
a4fc5ed6 | 876 | |
ea5b213a | 877 | switch (intel_dp->lane_count) { |
a4fc5ed6 | 878 | case 1: |
ea5b213a | 879 | intel_dp->DP |= DP_PORT_WIDTH_1; |
a4fc5ed6 KP |
880 | break; |
881 | case 2: | |
ea5b213a | 882 | intel_dp->DP |= DP_PORT_WIDTH_2; |
a4fc5ed6 KP |
883 | break; |
884 | case 4: | |
ea5b213a | 885 | intel_dp->DP |= DP_PORT_WIDTH_4; |
a4fc5ed6 KP |
886 | break; |
887 | } | |
e0dac65e WF |
888 | if (intel_dp->has_audio) { |
889 | DRM_DEBUG_DRIVER("Enabling DP audio on pipe %c\n", | |
890 | pipe_name(intel_crtc->pipe)); | |
ea5b213a | 891 | intel_dp->DP |= DP_AUDIO_OUTPUT_ENABLE; |
e0dac65e WF |
892 | intel_write_eld(encoder, adjusted_mode); |
893 | } | |
247d89f6 PZ |
894 | |
895 | intel_dp_init_link_config(intel_dp); | |
a4fc5ed6 | 896 | |
417e822d | 897 | /* Split out the IBX/CPU vs CPT settings */ |
32f9d658 | 898 | |
19c03924 | 899 | if (is_cpu_edp(intel_dp) && IS_GEN7(dev) && !IS_VALLEYVIEW(dev)) { |
1a2eb460 KP |
900 | if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC) |
901 | intel_dp->DP |= DP_SYNC_HS_HIGH; | |
902 | if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC) | |
903 | intel_dp->DP |= DP_SYNC_VS_HIGH; | |
904 | intel_dp->DP |= DP_LINK_TRAIN_OFF_CPT; | |
905 | ||
906 | if (intel_dp->link_configuration[1] & DP_LANE_COUNT_ENHANCED_FRAME_EN) | |
907 | intel_dp->DP |= DP_ENHANCED_FRAMING; | |
908 | ||
909 | intel_dp->DP |= intel_crtc->pipe << 29; | |
910 | ||
911 | /* don't miss out required setting for eDP */ | |
1a2eb460 KP |
912 | if (adjusted_mode->clock < 200000) |
913 | intel_dp->DP |= DP_PLL_FREQ_160MHZ; | |
914 | else | |
915 | intel_dp->DP |= DP_PLL_FREQ_270MHZ; | |
916 | } else if (!HAS_PCH_CPT(dev) || is_cpu_edp(intel_dp)) { | |
417e822d KP |
917 | intel_dp->DP |= intel_dp->color_range; |
918 | ||
919 | if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC) | |
920 | intel_dp->DP |= DP_SYNC_HS_HIGH; | |
921 | if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC) | |
922 | intel_dp->DP |= DP_SYNC_VS_HIGH; | |
923 | intel_dp->DP |= DP_LINK_TRAIN_OFF; | |
924 | ||
925 | if (intel_dp->link_configuration[1] & DP_LANE_COUNT_ENHANCED_FRAME_EN) | |
926 | intel_dp->DP |= DP_ENHANCED_FRAMING; | |
927 | ||
928 | if (intel_crtc->pipe == 1) | |
929 | intel_dp->DP |= DP_PIPEB_SELECT; | |
930 | ||
931 | if (is_cpu_edp(intel_dp)) { | |
932 | /* don't miss out required setting for eDP */ | |
417e822d KP |
933 | if (adjusted_mode->clock < 200000) |
934 | intel_dp->DP |= DP_PLL_FREQ_160MHZ; | |
935 | else | |
936 | intel_dp->DP |= DP_PLL_FREQ_270MHZ; | |
937 | } | |
938 | } else { | |
939 | intel_dp->DP |= DP_LINK_TRAIN_OFF_CPT; | |
32f9d658 | 940 | } |
a4fc5ed6 KP |
941 | } |
942 | ||
99ea7127 KP |
943 | #define IDLE_ON_MASK (PP_ON | 0 | PP_SEQUENCE_MASK | 0 | PP_SEQUENCE_STATE_MASK) |
944 | #define IDLE_ON_VALUE (PP_ON | 0 | PP_SEQUENCE_NONE | 0 | PP_SEQUENCE_STATE_ON_IDLE) | |
945 | ||
946 | #define IDLE_OFF_MASK (PP_ON | 0 | PP_SEQUENCE_MASK | 0 | PP_SEQUENCE_STATE_MASK) | |
947 | #define IDLE_OFF_VALUE (0 | 0 | PP_SEQUENCE_NONE | 0 | PP_SEQUENCE_STATE_OFF_IDLE) | |
948 | ||
949 | #define IDLE_CYCLE_MASK (PP_ON | 0 | PP_SEQUENCE_MASK | PP_CYCLE_DELAY_ACTIVE | PP_SEQUENCE_STATE_MASK) | |
950 | #define IDLE_CYCLE_VALUE (0 | 0 | PP_SEQUENCE_NONE | 0 | PP_SEQUENCE_STATE_OFF_IDLE) | |
951 | ||
952 | static void ironlake_wait_panel_status(struct intel_dp *intel_dp, | |
953 | u32 mask, | |
954 | u32 value) | |
bd943159 | 955 | { |
99ea7127 KP |
956 | struct drm_device *dev = intel_dp->base.base.dev; |
957 | struct drm_i915_private *dev_priv = dev->dev_private; | |
32ce697c | 958 | |
99ea7127 KP |
959 | DRM_DEBUG_KMS("mask %08x value %08x status %08x control %08x\n", |
960 | mask, value, | |
961 | I915_READ(PCH_PP_STATUS), | |
962 | I915_READ(PCH_PP_CONTROL)); | |
32ce697c | 963 | |
99ea7127 KP |
964 | if (_wait_for((I915_READ(PCH_PP_STATUS) & mask) == value, 5000, 10)) { |
965 | DRM_ERROR("Panel status timeout: status %08x control %08x\n", | |
966 | I915_READ(PCH_PP_STATUS), | |
967 | I915_READ(PCH_PP_CONTROL)); | |
32ce697c | 968 | } |
99ea7127 | 969 | } |
32ce697c | 970 | |
99ea7127 KP |
971 | static void ironlake_wait_panel_on(struct intel_dp *intel_dp) |
972 | { | |
973 | DRM_DEBUG_KMS("Wait for panel power on\n"); | |
974 | ironlake_wait_panel_status(intel_dp, IDLE_ON_MASK, IDLE_ON_VALUE); | |
bd943159 KP |
975 | } |
976 | ||
99ea7127 KP |
977 | static void ironlake_wait_panel_off(struct intel_dp *intel_dp) |
978 | { | |
979 | DRM_DEBUG_KMS("Wait for panel power off time\n"); | |
980 | ironlake_wait_panel_status(intel_dp, IDLE_OFF_MASK, IDLE_OFF_VALUE); | |
981 | } | |
982 | ||
983 | static void ironlake_wait_panel_power_cycle(struct intel_dp *intel_dp) | |
984 | { | |
985 | DRM_DEBUG_KMS("Wait for panel power cycle\n"); | |
986 | ironlake_wait_panel_status(intel_dp, IDLE_CYCLE_MASK, IDLE_CYCLE_VALUE); | |
987 | } | |
988 | ||
989 | ||
832dd3c1 KP |
990 | /* Read the current pp_control value, unlocking the register if it |
991 | * is locked | |
992 | */ | |
993 | ||
994 | static u32 ironlake_get_pp_control(struct drm_i915_private *dev_priv) | |
995 | { | |
996 | u32 control = I915_READ(PCH_PP_CONTROL); | |
997 | ||
998 | control &= ~PANEL_UNLOCK_MASK; | |
999 | control |= PANEL_UNLOCK_REGS; | |
1000 | return control; | |
bd943159 KP |
1001 | } |
1002 | ||
5d613501 JB |
1003 | static void ironlake_edp_panel_vdd_on(struct intel_dp *intel_dp) |
1004 | { | |
1005 | struct drm_device *dev = intel_dp->base.base.dev; | |
1006 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1007 | u32 pp; | |
1008 | ||
97af61f5 KP |
1009 | if (!is_edp(intel_dp)) |
1010 | return; | |
f01eca2e | 1011 | DRM_DEBUG_KMS("Turn eDP VDD on\n"); |
5d613501 | 1012 | |
bd943159 KP |
1013 | WARN(intel_dp->want_panel_vdd, |
1014 | "eDP VDD already requested on\n"); | |
1015 | ||
1016 | intel_dp->want_panel_vdd = true; | |
99ea7127 | 1017 | |
bd943159 KP |
1018 | if (ironlake_edp_have_panel_vdd(intel_dp)) { |
1019 | DRM_DEBUG_KMS("eDP VDD already on\n"); | |
1020 | return; | |
1021 | } | |
1022 | ||
99ea7127 KP |
1023 | if (!ironlake_edp_have_panel_power(intel_dp)) |
1024 | ironlake_wait_panel_power_cycle(intel_dp); | |
1025 | ||
832dd3c1 | 1026 | pp = ironlake_get_pp_control(dev_priv); |
5d613501 JB |
1027 | pp |= EDP_FORCE_VDD; |
1028 | I915_WRITE(PCH_PP_CONTROL, pp); | |
1029 | POSTING_READ(PCH_PP_CONTROL); | |
f01eca2e KP |
1030 | DRM_DEBUG_KMS("PCH_PP_STATUS: 0x%08x PCH_PP_CONTROL: 0x%08x\n", |
1031 | I915_READ(PCH_PP_STATUS), I915_READ(PCH_PP_CONTROL)); | |
ebf33b18 KP |
1032 | |
1033 | /* | |
1034 | * If the panel wasn't on, delay before accessing aux channel | |
1035 | */ | |
1036 | if (!ironlake_edp_have_panel_power(intel_dp)) { | |
bd943159 | 1037 | DRM_DEBUG_KMS("eDP was not running\n"); |
f01eca2e | 1038 | msleep(intel_dp->panel_power_up_delay); |
f01eca2e | 1039 | } |
5d613501 JB |
1040 | } |
1041 | ||
bd943159 | 1042 | static void ironlake_panel_vdd_off_sync(struct intel_dp *intel_dp) |
5d613501 JB |
1043 | { |
1044 | struct drm_device *dev = intel_dp->base.base.dev; | |
1045 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1046 | u32 pp; | |
1047 | ||
bd943159 | 1048 | if (!intel_dp->want_panel_vdd && ironlake_edp_have_panel_vdd(intel_dp)) { |
832dd3c1 | 1049 | pp = ironlake_get_pp_control(dev_priv); |
bd943159 KP |
1050 | pp &= ~EDP_FORCE_VDD; |
1051 | I915_WRITE(PCH_PP_CONTROL, pp); | |
1052 | POSTING_READ(PCH_PP_CONTROL); | |
1053 | ||
1054 | /* Make sure sequencer is idle before allowing subsequent activity */ | |
1055 | DRM_DEBUG_KMS("PCH_PP_STATUS: 0x%08x PCH_PP_CONTROL: 0x%08x\n", | |
1056 | I915_READ(PCH_PP_STATUS), I915_READ(PCH_PP_CONTROL)); | |
99ea7127 KP |
1057 | |
1058 | msleep(intel_dp->panel_power_down_delay); | |
bd943159 KP |
1059 | } |
1060 | } | |
5d613501 | 1061 | |
bd943159 KP |
1062 | static void ironlake_panel_vdd_work(struct work_struct *__work) |
1063 | { | |
1064 | struct intel_dp *intel_dp = container_of(to_delayed_work(__work), | |
1065 | struct intel_dp, panel_vdd_work); | |
1066 | struct drm_device *dev = intel_dp->base.base.dev; | |
1067 | ||
627f7675 | 1068 | mutex_lock(&dev->mode_config.mutex); |
bd943159 | 1069 | ironlake_panel_vdd_off_sync(intel_dp); |
627f7675 | 1070 | mutex_unlock(&dev->mode_config.mutex); |
bd943159 KP |
1071 | } |
1072 | ||
1073 | static void ironlake_edp_panel_vdd_off(struct intel_dp *intel_dp, bool sync) | |
1074 | { | |
97af61f5 KP |
1075 | if (!is_edp(intel_dp)) |
1076 | return; | |
5d613501 | 1077 | |
bd943159 KP |
1078 | DRM_DEBUG_KMS("Turn eDP VDD off %d\n", intel_dp->want_panel_vdd); |
1079 | WARN(!intel_dp->want_panel_vdd, "eDP VDD not forced on"); | |
f2e8b18a | 1080 | |
bd943159 KP |
1081 | intel_dp->want_panel_vdd = false; |
1082 | ||
1083 | if (sync) { | |
1084 | ironlake_panel_vdd_off_sync(intel_dp); | |
1085 | } else { | |
1086 | /* | |
1087 | * Queue the timer to fire a long | |
1088 | * time from now (relative to the power down delay) | |
1089 | * to keep the panel power up across a sequence of operations | |
1090 | */ | |
1091 | schedule_delayed_work(&intel_dp->panel_vdd_work, | |
1092 | msecs_to_jiffies(intel_dp->panel_power_cycle_delay * 5)); | |
1093 | } | |
5d613501 JB |
1094 | } |
1095 | ||
86a3073e | 1096 | static void ironlake_edp_panel_on(struct intel_dp *intel_dp) |
9934c132 | 1097 | { |
01cb9ea6 | 1098 | struct drm_device *dev = intel_dp->base.base.dev; |
9934c132 | 1099 | struct drm_i915_private *dev_priv = dev->dev_private; |
99ea7127 | 1100 | u32 pp; |
9934c132 | 1101 | |
97af61f5 | 1102 | if (!is_edp(intel_dp)) |
bd943159 | 1103 | return; |
99ea7127 KP |
1104 | |
1105 | DRM_DEBUG_KMS("Turn eDP power on\n"); | |
1106 | ||
1107 | if (ironlake_edp_have_panel_power(intel_dp)) { | |
1108 | DRM_DEBUG_KMS("eDP power already on\n"); | |
7d639f35 | 1109 | return; |
99ea7127 | 1110 | } |
9934c132 | 1111 | |
99ea7127 | 1112 | ironlake_wait_panel_power_cycle(intel_dp); |
37c6c9b0 | 1113 | |
99ea7127 | 1114 | pp = ironlake_get_pp_control(dev_priv); |
05ce1a49 KP |
1115 | if (IS_GEN5(dev)) { |
1116 | /* ILK workaround: disable reset around power sequence */ | |
1117 | pp &= ~PANEL_POWER_RESET; | |
1118 | I915_WRITE(PCH_PP_CONTROL, pp); | |
1119 | POSTING_READ(PCH_PP_CONTROL); | |
1120 | } | |
37c6c9b0 | 1121 | |
1c0ae80a | 1122 | pp |= POWER_TARGET_ON; |
99ea7127 KP |
1123 | if (!IS_GEN5(dev)) |
1124 | pp |= PANEL_POWER_RESET; | |
1125 | ||
9934c132 | 1126 | I915_WRITE(PCH_PP_CONTROL, pp); |
01cb9ea6 | 1127 | POSTING_READ(PCH_PP_CONTROL); |
9934c132 | 1128 | |
99ea7127 | 1129 | ironlake_wait_panel_on(intel_dp); |
9934c132 | 1130 | |
05ce1a49 KP |
1131 | if (IS_GEN5(dev)) { |
1132 | pp |= PANEL_POWER_RESET; /* restore panel reset bit */ | |
1133 | I915_WRITE(PCH_PP_CONTROL, pp); | |
1134 | POSTING_READ(PCH_PP_CONTROL); | |
1135 | } | |
9934c132 JB |
1136 | } |
1137 | ||
99ea7127 | 1138 | static void ironlake_edp_panel_off(struct intel_dp *intel_dp) |
9934c132 | 1139 | { |
99ea7127 | 1140 | struct drm_device *dev = intel_dp->base.base.dev; |
9934c132 | 1141 | struct drm_i915_private *dev_priv = dev->dev_private; |
99ea7127 | 1142 | u32 pp; |
9934c132 | 1143 | |
97af61f5 KP |
1144 | if (!is_edp(intel_dp)) |
1145 | return; | |
37c6c9b0 | 1146 | |
99ea7127 | 1147 | DRM_DEBUG_KMS("Turn eDP power off\n"); |
37c6c9b0 | 1148 | |
6cb49835 | 1149 | WARN(!intel_dp->want_panel_vdd, "Need VDD to turn off panel\n"); |
37c6c9b0 | 1150 | |
99ea7127 | 1151 | pp = ironlake_get_pp_control(dev_priv); |
35a38556 DV |
1152 | /* We need to switch off panel power _and_ force vdd, for otherwise some |
1153 | * panels get very unhappy and cease to work. */ | |
1154 | pp &= ~(POWER_TARGET_ON | EDP_FORCE_VDD | PANEL_POWER_RESET | EDP_BLC_ENABLE); | |
99ea7127 KP |
1155 | I915_WRITE(PCH_PP_CONTROL, pp); |
1156 | POSTING_READ(PCH_PP_CONTROL); | |
9934c132 | 1157 | |
35a38556 DV |
1158 | intel_dp->want_panel_vdd = false; |
1159 | ||
99ea7127 | 1160 | ironlake_wait_panel_off(intel_dp); |
9934c132 JB |
1161 | } |
1162 | ||
86a3073e | 1163 | static void ironlake_edp_backlight_on(struct intel_dp *intel_dp) |
32f9d658 | 1164 | { |
f01eca2e | 1165 | struct drm_device *dev = intel_dp->base.base.dev; |
32f9d658 ZW |
1166 | struct drm_i915_private *dev_priv = dev->dev_private; |
1167 | u32 pp; | |
1168 | ||
f01eca2e KP |
1169 | if (!is_edp(intel_dp)) |
1170 | return; | |
1171 | ||
28c97730 | 1172 | DRM_DEBUG_KMS("\n"); |
01cb9ea6 JB |
1173 | /* |
1174 | * If we enable the backlight right away following a panel power | |
1175 | * on, we may see slight flicker as the panel syncs with the eDP | |
1176 | * link. So delay a bit to make sure the image is solid before | |
1177 | * allowing it to appear. | |
1178 | */ | |
f01eca2e | 1179 | msleep(intel_dp->backlight_on_delay); |
832dd3c1 | 1180 | pp = ironlake_get_pp_control(dev_priv); |
32f9d658 ZW |
1181 | pp |= EDP_BLC_ENABLE; |
1182 | I915_WRITE(PCH_PP_CONTROL, pp); | |
f01eca2e | 1183 | POSTING_READ(PCH_PP_CONTROL); |
32f9d658 ZW |
1184 | } |
1185 | ||
86a3073e | 1186 | static void ironlake_edp_backlight_off(struct intel_dp *intel_dp) |
32f9d658 | 1187 | { |
f01eca2e | 1188 | struct drm_device *dev = intel_dp->base.base.dev; |
32f9d658 ZW |
1189 | struct drm_i915_private *dev_priv = dev->dev_private; |
1190 | u32 pp; | |
1191 | ||
f01eca2e KP |
1192 | if (!is_edp(intel_dp)) |
1193 | return; | |
1194 | ||
28c97730 | 1195 | DRM_DEBUG_KMS("\n"); |
832dd3c1 | 1196 | pp = ironlake_get_pp_control(dev_priv); |
32f9d658 ZW |
1197 | pp &= ~EDP_BLC_ENABLE; |
1198 | I915_WRITE(PCH_PP_CONTROL, pp); | |
f01eca2e KP |
1199 | POSTING_READ(PCH_PP_CONTROL); |
1200 | msleep(intel_dp->backlight_off_delay); | |
32f9d658 | 1201 | } |
a4fc5ed6 | 1202 | |
2bd2ad64 | 1203 | static void ironlake_edp_pll_on(struct intel_dp *intel_dp) |
d240f20f | 1204 | { |
2bd2ad64 DV |
1205 | struct drm_device *dev = intel_dp->base.base.dev; |
1206 | struct drm_crtc *crtc = intel_dp->base.base.crtc; | |
d240f20f JB |
1207 | struct drm_i915_private *dev_priv = dev->dev_private; |
1208 | u32 dpa_ctl; | |
1209 | ||
2bd2ad64 DV |
1210 | assert_pipe_disabled(dev_priv, |
1211 | to_intel_crtc(crtc)->pipe); | |
1212 | ||
d240f20f JB |
1213 | DRM_DEBUG_KMS("\n"); |
1214 | dpa_ctl = I915_READ(DP_A); | |
0767935e DV |
1215 | WARN(dpa_ctl & DP_PLL_ENABLE, "dp pll on, should be off\n"); |
1216 | WARN(dpa_ctl & DP_PORT_EN, "dp port still on, should be off\n"); | |
1217 | ||
1218 | /* We don't adjust intel_dp->DP while tearing down the link, to | |
1219 | * facilitate link retraining (e.g. after hotplug). Hence clear all | |
1220 | * enable bits here to ensure that we don't enable too much. */ | |
1221 | intel_dp->DP &= ~(DP_PORT_EN | DP_AUDIO_OUTPUT_ENABLE); | |
1222 | intel_dp->DP |= DP_PLL_ENABLE; | |
1223 | I915_WRITE(DP_A, intel_dp->DP); | |
298b0b39 JB |
1224 | POSTING_READ(DP_A); |
1225 | udelay(200); | |
d240f20f JB |
1226 | } |
1227 | ||
2bd2ad64 | 1228 | static void ironlake_edp_pll_off(struct intel_dp *intel_dp) |
d240f20f | 1229 | { |
2bd2ad64 DV |
1230 | struct drm_device *dev = intel_dp->base.base.dev; |
1231 | struct drm_crtc *crtc = intel_dp->base.base.crtc; | |
d240f20f JB |
1232 | struct drm_i915_private *dev_priv = dev->dev_private; |
1233 | u32 dpa_ctl; | |
1234 | ||
2bd2ad64 DV |
1235 | assert_pipe_disabled(dev_priv, |
1236 | to_intel_crtc(crtc)->pipe); | |
1237 | ||
d240f20f | 1238 | dpa_ctl = I915_READ(DP_A); |
0767935e DV |
1239 | WARN((dpa_ctl & DP_PLL_ENABLE) == 0, |
1240 | "dp pll off, should be on\n"); | |
1241 | WARN(dpa_ctl & DP_PORT_EN, "dp port still on, should be off\n"); | |
1242 | ||
1243 | /* We can't rely on the value tracked for the DP register in | |
1244 | * intel_dp->DP because link_down must not change that (otherwise link | |
1245 | * re-training will fail. */ | |
298b0b39 | 1246 | dpa_ctl &= ~DP_PLL_ENABLE; |
d240f20f | 1247 | I915_WRITE(DP_A, dpa_ctl); |
1af5fa1b | 1248 | POSTING_READ(DP_A); |
d240f20f JB |
1249 | udelay(200); |
1250 | } | |
1251 | ||
c7ad3810 | 1252 | /* If the sink supports it, try to set the power state appropriately */ |
c19b0669 | 1253 | void intel_dp_sink_dpms(struct intel_dp *intel_dp, int mode) |
c7ad3810 JB |
1254 | { |
1255 | int ret, i; | |
1256 | ||
1257 | /* Should have a valid DPCD by this point */ | |
1258 | if (intel_dp->dpcd[DP_DPCD_REV] < 0x11) | |
1259 | return; | |
1260 | ||
1261 | if (mode != DRM_MODE_DPMS_ON) { | |
1262 | ret = intel_dp_aux_native_write_1(intel_dp, DP_SET_POWER, | |
1263 | DP_SET_POWER_D3); | |
1264 | if (ret != 1) | |
1265 | DRM_DEBUG_DRIVER("failed to write sink power state\n"); | |
1266 | } else { | |
1267 | /* | |
1268 | * When turning on, we need to retry for 1ms to give the sink | |
1269 | * time to wake up. | |
1270 | */ | |
1271 | for (i = 0; i < 3; i++) { | |
1272 | ret = intel_dp_aux_native_write_1(intel_dp, | |
1273 | DP_SET_POWER, | |
1274 | DP_SET_POWER_D0); | |
1275 | if (ret == 1) | |
1276 | break; | |
1277 | msleep(1); | |
1278 | } | |
1279 | } | |
1280 | } | |
1281 | ||
19d8fe15 DV |
1282 | static bool intel_dp_get_hw_state(struct intel_encoder *encoder, |
1283 | enum pipe *pipe) | |
d240f20f | 1284 | { |
19d8fe15 DV |
1285 | struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base); |
1286 | struct drm_device *dev = encoder->base.dev; | |
1287 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1288 | u32 tmp = I915_READ(intel_dp->output_reg); | |
1289 | ||
1290 | if (!(tmp & DP_PORT_EN)) | |
1291 | return false; | |
1292 | ||
1293 | if (is_cpu_edp(intel_dp) && IS_GEN7(dev)) { | |
1294 | *pipe = PORT_TO_PIPE_CPT(tmp); | |
1295 | } else if (!HAS_PCH_CPT(dev) || is_cpu_edp(intel_dp)) { | |
1296 | *pipe = PORT_TO_PIPE(tmp); | |
1297 | } else { | |
1298 | u32 trans_sel; | |
1299 | u32 trans_dp; | |
1300 | int i; | |
1301 | ||
1302 | switch (intel_dp->output_reg) { | |
1303 | case PCH_DP_B: | |
1304 | trans_sel = TRANS_DP_PORT_SEL_B; | |
1305 | break; | |
1306 | case PCH_DP_C: | |
1307 | trans_sel = TRANS_DP_PORT_SEL_C; | |
1308 | break; | |
1309 | case PCH_DP_D: | |
1310 | trans_sel = TRANS_DP_PORT_SEL_D; | |
1311 | break; | |
1312 | default: | |
1313 | return true; | |
1314 | } | |
1315 | ||
1316 | for_each_pipe(i) { | |
1317 | trans_dp = I915_READ(TRANS_DP_CTL(i)); | |
1318 | if ((trans_dp & TRANS_DP_PORT_SEL_MASK) == trans_sel) { | |
1319 | *pipe = i; | |
1320 | return true; | |
1321 | } | |
1322 | } | |
1323 | } | |
1324 | ||
1325 | DRM_DEBUG_KMS("No pipe for dp port 0x%x found\n", intel_dp->output_reg); | |
d240f20f | 1326 | |
19d8fe15 DV |
1327 | return true; |
1328 | } | |
1329 | ||
e8cb4558 | 1330 | static void intel_disable_dp(struct intel_encoder *encoder) |
d240f20f | 1331 | { |
e8cb4558 | 1332 | struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base); |
6cb49835 DV |
1333 | |
1334 | /* Make sure the panel is off before trying to change the mode. But also | |
1335 | * ensure that we have vdd while we switch off the panel. */ | |
1336 | ironlake_edp_panel_vdd_on(intel_dp); | |
21264c63 | 1337 | ironlake_edp_backlight_off(intel_dp); |
c7ad3810 | 1338 | intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON); |
35a38556 | 1339 | ironlake_edp_panel_off(intel_dp); |
3739850b DV |
1340 | |
1341 | /* cpu edp my only be disable _after_ the cpu pipe/plane is disabled. */ | |
1342 | if (!is_cpu_edp(intel_dp)) | |
1343 | intel_dp_link_down(intel_dp); | |
d240f20f JB |
1344 | } |
1345 | ||
2bd2ad64 DV |
1346 | static void intel_post_disable_dp(struct intel_encoder *encoder) |
1347 | { | |
1348 | struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base); | |
1349 | ||
3739850b DV |
1350 | if (is_cpu_edp(intel_dp)) { |
1351 | intel_dp_link_down(intel_dp); | |
2bd2ad64 | 1352 | ironlake_edp_pll_off(intel_dp); |
3739850b | 1353 | } |
2bd2ad64 DV |
1354 | } |
1355 | ||
e8cb4558 | 1356 | static void intel_enable_dp(struct intel_encoder *encoder) |
d240f20f | 1357 | { |
e8cb4558 DV |
1358 | struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base); |
1359 | struct drm_device *dev = encoder->base.dev; | |
1360 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1361 | uint32_t dp_reg = I915_READ(intel_dp->output_reg); | |
5d613501 | 1362 | |
0c33d8d7 DV |
1363 | if (WARN_ON(dp_reg & DP_PORT_EN)) |
1364 | return; | |
1365 | ||
97af61f5 | 1366 | ironlake_edp_panel_vdd_on(intel_dp); |
f01eca2e | 1367 | intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON); |
0c33d8d7 DV |
1368 | intel_dp_start_link_train(intel_dp); |
1369 | ironlake_edp_panel_on(intel_dp); | |
1370 | ironlake_edp_panel_vdd_off(intel_dp, true); | |
1371 | intel_dp_complete_link_train(intel_dp); | |
f01eca2e | 1372 | ironlake_edp_backlight_on(intel_dp); |
d240f20f JB |
1373 | } |
1374 | ||
2bd2ad64 | 1375 | static void intel_pre_enable_dp(struct intel_encoder *encoder) |
a4fc5ed6 | 1376 | { |
2bd2ad64 | 1377 | struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base); |
0a91ca29 | 1378 | |
2bd2ad64 DV |
1379 | if (is_cpu_edp(intel_dp)) |
1380 | ironlake_edp_pll_on(intel_dp); | |
a4fc5ed6 KP |
1381 | } |
1382 | ||
1383 | /* | |
df0c237d JB |
1384 | * Native read with retry for link status and receiver capability reads for |
1385 | * cases where the sink may still be asleep. | |
a4fc5ed6 KP |
1386 | */ |
1387 | static bool | |
df0c237d JB |
1388 | intel_dp_aux_native_read_retry(struct intel_dp *intel_dp, uint16_t address, |
1389 | uint8_t *recv, int recv_bytes) | |
a4fc5ed6 | 1390 | { |
61da5fab JB |
1391 | int ret, i; |
1392 | ||
df0c237d JB |
1393 | /* |
1394 | * Sinks are *supposed* to come up within 1ms from an off state, | |
1395 | * but we're also supposed to retry 3 times per the spec. | |
1396 | */ | |
61da5fab | 1397 | for (i = 0; i < 3; i++) { |
df0c237d JB |
1398 | ret = intel_dp_aux_native_read(intel_dp, address, recv, |
1399 | recv_bytes); | |
1400 | if (ret == recv_bytes) | |
61da5fab JB |
1401 | return true; |
1402 | msleep(1); | |
1403 | } | |
a4fc5ed6 | 1404 | |
61da5fab | 1405 | return false; |
a4fc5ed6 KP |
1406 | } |
1407 | ||
1408 | /* | |
1409 | * Fetch AUX CH registers 0x202 - 0x207 which contain | |
1410 | * link status information | |
1411 | */ | |
1412 | static bool | |
93f62dad | 1413 | intel_dp_get_link_status(struct intel_dp *intel_dp, uint8_t link_status[DP_LINK_STATUS_SIZE]) |
a4fc5ed6 | 1414 | { |
df0c237d JB |
1415 | return intel_dp_aux_native_read_retry(intel_dp, |
1416 | DP_LANE0_1_STATUS, | |
93f62dad | 1417 | link_status, |
df0c237d | 1418 | DP_LINK_STATUS_SIZE); |
a4fc5ed6 KP |
1419 | } |
1420 | ||
a4fc5ed6 KP |
1421 | #if 0 |
1422 | static char *voltage_names[] = { | |
1423 | "0.4V", "0.6V", "0.8V", "1.2V" | |
1424 | }; | |
1425 | static char *pre_emph_names[] = { | |
1426 | "0dB", "3.5dB", "6dB", "9.5dB" | |
1427 | }; | |
1428 | static char *link_train_names[] = { | |
1429 | "pattern 1", "pattern 2", "idle", "off" | |
1430 | }; | |
1431 | #endif | |
1432 | ||
1433 | /* | |
1434 | * These are source-specific values; current Intel hardware supports | |
1435 | * a maximum voltage of 800mV and a maximum pre-emphasis of 6dB | |
1436 | */ | |
a4fc5ed6 KP |
1437 | |
1438 | static uint8_t | |
1a2eb460 | 1439 | intel_dp_voltage_max(struct intel_dp *intel_dp) |
a4fc5ed6 | 1440 | { |
1a2eb460 KP |
1441 | struct drm_device *dev = intel_dp->base.base.dev; |
1442 | ||
1443 | if (IS_GEN7(dev) && is_cpu_edp(intel_dp)) | |
1444 | return DP_TRAIN_VOLTAGE_SWING_800; | |
1445 | else if (HAS_PCH_CPT(dev) && !is_cpu_edp(intel_dp)) | |
1446 | return DP_TRAIN_VOLTAGE_SWING_1200; | |
1447 | else | |
1448 | return DP_TRAIN_VOLTAGE_SWING_800; | |
1449 | } | |
1450 | ||
1451 | static uint8_t | |
1452 | intel_dp_pre_emphasis_max(struct intel_dp *intel_dp, uint8_t voltage_swing) | |
1453 | { | |
1454 | struct drm_device *dev = intel_dp->base.base.dev; | |
1455 | ||
d6c0d722 PZ |
1456 | if (IS_HASWELL(dev)) { |
1457 | switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) { | |
1458 | case DP_TRAIN_VOLTAGE_SWING_400: | |
1459 | return DP_TRAIN_PRE_EMPHASIS_9_5; | |
1460 | case DP_TRAIN_VOLTAGE_SWING_600: | |
1461 | return DP_TRAIN_PRE_EMPHASIS_6; | |
1462 | case DP_TRAIN_VOLTAGE_SWING_800: | |
1463 | return DP_TRAIN_PRE_EMPHASIS_3_5; | |
1464 | case DP_TRAIN_VOLTAGE_SWING_1200: | |
1465 | default: | |
1466 | return DP_TRAIN_PRE_EMPHASIS_0; | |
1467 | } | |
1468 | } else if (IS_GEN7(dev) && is_cpu_edp(intel_dp) && !IS_VALLEYVIEW(dev)) { | |
1a2eb460 KP |
1469 | switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) { |
1470 | case DP_TRAIN_VOLTAGE_SWING_400: | |
1471 | return DP_TRAIN_PRE_EMPHASIS_6; | |
1472 | case DP_TRAIN_VOLTAGE_SWING_600: | |
1473 | case DP_TRAIN_VOLTAGE_SWING_800: | |
1474 | return DP_TRAIN_PRE_EMPHASIS_3_5; | |
1475 | default: | |
1476 | return DP_TRAIN_PRE_EMPHASIS_0; | |
1477 | } | |
1478 | } else { | |
1479 | switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) { | |
1480 | case DP_TRAIN_VOLTAGE_SWING_400: | |
1481 | return DP_TRAIN_PRE_EMPHASIS_6; | |
1482 | case DP_TRAIN_VOLTAGE_SWING_600: | |
1483 | return DP_TRAIN_PRE_EMPHASIS_6; | |
1484 | case DP_TRAIN_VOLTAGE_SWING_800: | |
1485 | return DP_TRAIN_PRE_EMPHASIS_3_5; | |
1486 | case DP_TRAIN_VOLTAGE_SWING_1200: | |
1487 | default: | |
1488 | return DP_TRAIN_PRE_EMPHASIS_0; | |
1489 | } | |
a4fc5ed6 KP |
1490 | } |
1491 | } | |
1492 | ||
1493 | static void | |
93f62dad | 1494 | intel_get_adjust_train(struct intel_dp *intel_dp, uint8_t link_status[DP_LINK_STATUS_SIZE]) |
a4fc5ed6 KP |
1495 | { |
1496 | uint8_t v = 0; | |
1497 | uint8_t p = 0; | |
1498 | int lane; | |
1a2eb460 KP |
1499 | uint8_t voltage_max; |
1500 | uint8_t preemph_max; | |
a4fc5ed6 | 1501 | |
33a34e4e | 1502 | for (lane = 0; lane < intel_dp->lane_count; lane++) { |
0f037bde DV |
1503 | uint8_t this_v = drm_dp_get_adjust_request_voltage(link_status, lane); |
1504 | uint8_t this_p = drm_dp_get_adjust_request_pre_emphasis(link_status, lane); | |
a4fc5ed6 KP |
1505 | |
1506 | if (this_v > v) | |
1507 | v = this_v; | |
1508 | if (this_p > p) | |
1509 | p = this_p; | |
1510 | } | |
1511 | ||
1a2eb460 | 1512 | voltage_max = intel_dp_voltage_max(intel_dp); |
417e822d KP |
1513 | if (v >= voltage_max) |
1514 | v = voltage_max | DP_TRAIN_MAX_SWING_REACHED; | |
a4fc5ed6 | 1515 | |
1a2eb460 KP |
1516 | preemph_max = intel_dp_pre_emphasis_max(intel_dp, v); |
1517 | if (p >= preemph_max) | |
1518 | p = preemph_max | DP_TRAIN_MAX_PRE_EMPHASIS_REACHED; | |
a4fc5ed6 KP |
1519 | |
1520 | for (lane = 0; lane < 4; lane++) | |
33a34e4e | 1521 | intel_dp->train_set[lane] = v | p; |
a4fc5ed6 KP |
1522 | } |
1523 | ||
1524 | static uint32_t | |
93f62dad | 1525 | intel_dp_signal_levels(uint8_t train_set) |
a4fc5ed6 | 1526 | { |
3cf2efb1 | 1527 | uint32_t signal_levels = 0; |
a4fc5ed6 | 1528 | |
3cf2efb1 | 1529 | switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) { |
a4fc5ed6 KP |
1530 | case DP_TRAIN_VOLTAGE_SWING_400: |
1531 | default: | |
1532 | signal_levels |= DP_VOLTAGE_0_4; | |
1533 | break; | |
1534 | case DP_TRAIN_VOLTAGE_SWING_600: | |
1535 | signal_levels |= DP_VOLTAGE_0_6; | |
1536 | break; | |
1537 | case DP_TRAIN_VOLTAGE_SWING_800: | |
1538 | signal_levels |= DP_VOLTAGE_0_8; | |
1539 | break; | |
1540 | case DP_TRAIN_VOLTAGE_SWING_1200: | |
1541 | signal_levels |= DP_VOLTAGE_1_2; | |
1542 | break; | |
1543 | } | |
3cf2efb1 | 1544 | switch (train_set & DP_TRAIN_PRE_EMPHASIS_MASK) { |
a4fc5ed6 KP |
1545 | case DP_TRAIN_PRE_EMPHASIS_0: |
1546 | default: | |
1547 | signal_levels |= DP_PRE_EMPHASIS_0; | |
1548 | break; | |
1549 | case DP_TRAIN_PRE_EMPHASIS_3_5: | |
1550 | signal_levels |= DP_PRE_EMPHASIS_3_5; | |
1551 | break; | |
1552 | case DP_TRAIN_PRE_EMPHASIS_6: | |
1553 | signal_levels |= DP_PRE_EMPHASIS_6; | |
1554 | break; | |
1555 | case DP_TRAIN_PRE_EMPHASIS_9_5: | |
1556 | signal_levels |= DP_PRE_EMPHASIS_9_5; | |
1557 | break; | |
1558 | } | |
1559 | return signal_levels; | |
1560 | } | |
1561 | ||
e3421a18 ZW |
1562 | /* Gen6's DP voltage swing and pre-emphasis control */ |
1563 | static uint32_t | |
1564 | intel_gen6_edp_signal_levels(uint8_t train_set) | |
1565 | { | |
3c5a62b5 YL |
1566 | int signal_levels = train_set & (DP_TRAIN_VOLTAGE_SWING_MASK | |
1567 | DP_TRAIN_PRE_EMPHASIS_MASK); | |
1568 | switch (signal_levels) { | |
e3421a18 | 1569 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_0: |
3c5a62b5 YL |
1570 | case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_0: |
1571 | return EDP_LINK_TRAIN_400_600MV_0DB_SNB_B; | |
1572 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_3_5: | |
1573 | return EDP_LINK_TRAIN_400MV_3_5DB_SNB_B; | |
e3421a18 | 1574 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_6: |
3c5a62b5 YL |
1575 | case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_6: |
1576 | return EDP_LINK_TRAIN_400_600MV_6DB_SNB_B; | |
e3421a18 | 1577 | case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_3_5: |
3c5a62b5 YL |
1578 | case DP_TRAIN_VOLTAGE_SWING_800 | DP_TRAIN_PRE_EMPHASIS_3_5: |
1579 | return EDP_LINK_TRAIN_600_800MV_3_5DB_SNB_B; | |
e3421a18 | 1580 | case DP_TRAIN_VOLTAGE_SWING_800 | DP_TRAIN_PRE_EMPHASIS_0: |
3c5a62b5 YL |
1581 | case DP_TRAIN_VOLTAGE_SWING_1200 | DP_TRAIN_PRE_EMPHASIS_0: |
1582 | return EDP_LINK_TRAIN_800_1200MV_0DB_SNB_B; | |
e3421a18 | 1583 | default: |
3c5a62b5 YL |
1584 | DRM_DEBUG_KMS("Unsupported voltage swing/pre-emphasis level:" |
1585 | "0x%x\n", signal_levels); | |
1586 | return EDP_LINK_TRAIN_400_600MV_0DB_SNB_B; | |
e3421a18 ZW |
1587 | } |
1588 | } | |
1589 | ||
1a2eb460 KP |
1590 | /* Gen7's DP voltage swing and pre-emphasis control */ |
1591 | static uint32_t | |
1592 | intel_gen7_edp_signal_levels(uint8_t train_set) | |
1593 | { | |
1594 | int signal_levels = train_set & (DP_TRAIN_VOLTAGE_SWING_MASK | | |
1595 | DP_TRAIN_PRE_EMPHASIS_MASK); | |
1596 | switch (signal_levels) { | |
1597 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_0: | |
1598 | return EDP_LINK_TRAIN_400MV_0DB_IVB; | |
1599 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_3_5: | |
1600 | return EDP_LINK_TRAIN_400MV_3_5DB_IVB; | |
1601 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_6: | |
1602 | return EDP_LINK_TRAIN_400MV_6DB_IVB; | |
1603 | ||
1604 | case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_0: | |
1605 | return EDP_LINK_TRAIN_600MV_0DB_IVB; | |
1606 | case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_3_5: | |
1607 | return EDP_LINK_TRAIN_600MV_3_5DB_IVB; | |
1608 | ||
1609 | case DP_TRAIN_VOLTAGE_SWING_800 | DP_TRAIN_PRE_EMPHASIS_0: | |
1610 | return EDP_LINK_TRAIN_800MV_0DB_IVB; | |
1611 | case DP_TRAIN_VOLTAGE_SWING_800 | DP_TRAIN_PRE_EMPHASIS_3_5: | |
1612 | return EDP_LINK_TRAIN_800MV_3_5DB_IVB; | |
1613 | ||
1614 | default: | |
1615 | DRM_DEBUG_KMS("Unsupported voltage swing/pre-emphasis level:" | |
1616 | "0x%x\n", signal_levels); | |
1617 | return EDP_LINK_TRAIN_500MV_0DB_IVB; | |
1618 | } | |
1619 | } | |
1620 | ||
d6c0d722 PZ |
1621 | /* Gen7.5's (HSW) DP voltage swing and pre-emphasis control */ |
1622 | static uint32_t | |
1623 | intel_dp_signal_levels_hsw(uint8_t train_set) | |
1624 | { | |
1625 | int signal_levels = train_set & (DP_TRAIN_VOLTAGE_SWING_MASK | | |
1626 | DP_TRAIN_PRE_EMPHASIS_MASK); | |
1627 | switch (signal_levels) { | |
1628 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_0: | |
1629 | return DDI_BUF_EMP_400MV_0DB_HSW; | |
1630 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_3_5: | |
1631 | return DDI_BUF_EMP_400MV_3_5DB_HSW; | |
1632 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_6: | |
1633 | return DDI_BUF_EMP_400MV_6DB_HSW; | |
1634 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_9_5: | |
1635 | return DDI_BUF_EMP_400MV_9_5DB_HSW; | |
1636 | ||
1637 | case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_0: | |
1638 | return DDI_BUF_EMP_600MV_0DB_HSW; | |
1639 | case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_3_5: | |
1640 | return DDI_BUF_EMP_600MV_3_5DB_HSW; | |
1641 | case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_6: | |
1642 | return DDI_BUF_EMP_600MV_6DB_HSW; | |
1643 | ||
1644 | case DP_TRAIN_VOLTAGE_SWING_800 | DP_TRAIN_PRE_EMPHASIS_0: | |
1645 | return DDI_BUF_EMP_800MV_0DB_HSW; | |
1646 | case DP_TRAIN_VOLTAGE_SWING_800 | DP_TRAIN_PRE_EMPHASIS_3_5: | |
1647 | return DDI_BUF_EMP_800MV_3_5DB_HSW; | |
1648 | default: | |
1649 | DRM_DEBUG_KMS("Unsupported voltage swing/pre-emphasis level:" | |
1650 | "0x%x\n", signal_levels); | |
1651 | return DDI_BUF_EMP_400MV_0DB_HSW; | |
1652 | } | |
1653 | } | |
1654 | ||
a4fc5ed6 | 1655 | static bool |
ea5b213a | 1656 | intel_dp_set_link_train(struct intel_dp *intel_dp, |
a4fc5ed6 | 1657 | uint32_t dp_reg_value, |
58e10eb9 | 1658 | uint8_t dp_train_pat) |
a4fc5ed6 | 1659 | { |
4ef69c7a | 1660 | struct drm_device *dev = intel_dp->base.base.dev; |
a4fc5ed6 | 1661 | struct drm_i915_private *dev_priv = dev->dev_private; |
a4fc5ed6 | 1662 | int ret; |
d6c0d722 | 1663 | uint32_t temp; |
a4fc5ed6 | 1664 | |
d6c0d722 PZ |
1665 | if (IS_HASWELL(dev)) { |
1666 | temp = I915_READ(DP_TP_CTL(intel_dp->port)); | |
1667 | ||
1668 | if (dp_train_pat & DP_LINK_SCRAMBLING_DISABLE) | |
1669 | temp |= DP_TP_CTL_SCRAMBLE_DISABLE; | |
1670 | else | |
1671 | temp &= ~DP_TP_CTL_SCRAMBLE_DISABLE; | |
1672 | ||
1673 | temp &= ~DP_TP_CTL_LINK_TRAIN_MASK; | |
1674 | switch (dp_train_pat & DP_TRAINING_PATTERN_MASK) { | |
1675 | case DP_TRAINING_PATTERN_DISABLE: | |
1676 | temp |= DP_TP_CTL_LINK_TRAIN_IDLE; | |
1677 | I915_WRITE(DP_TP_CTL(intel_dp->port), temp); | |
1678 | ||
1679 | if (wait_for((I915_READ(DP_TP_STATUS(intel_dp->port)) & | |
1680 | DP_TP_STATUS_IDLE_DONE), 1)) | |
1681 | DRM_ERROR("Timed out waiting for DP idle patterns\n"); | |
1682 | ||
1683 | temp &= ~DP_TP_CTL_LINK_TRAIN_MASK; | |
1684 | temp |= DP_TP_CTL_LINK_TRAIN_NORMAL; | |
1685 | ||
1686 | break; | |
1687 | case DP_TRAINING_PATTERN_1: | |
1688 | temp |= DP_TP_CTL_LINK_TRAIN_PAT1; | |
1689 | break; | |
1690 | case DP_TRAINING_PATTERN_2: | |
1691 | temp |= DP_TP_CTL_LINK_TRAIN_PAT2; | |
1692 | break; | |
1693 | case DP_TRAINING_PATTERN_3: | |
1694 | temp |= DP_TP_CTL_LINK_TRAIN_PAT3; | |
1695 | break; | |
1696 | } | |
1697 | I915_WRITE(DP_TP_CTL(intel_dp->port), temp); | |
1698 | ||
1699 | } else if (HAS_PCH_CPT(dev) && | |
1700 | (IS_GEN7(dev) || !is_cpu_edp(intel_dp))) { | |
47ea7542 PZ |
1701 | dp_reg_value &= ~DP_LINK_TRAIN_MASK_CPT; |
1702 | ||
1703 | switch (dp_train_pat & DP_TRAINING_PATTERN_MASK) { | |
1704 | case DP_TRAINING_PATTERN_DISABLE: | |
1705 | dp_reg_value |= DP_LINK_TRAIN_OFF_CPT; | |
1706 | break; | |
1707 | case DP_TRAINING_PATTERN_1: | |
1708 | dp_reg_value |= DP_LINK_TRAIN_PAT_1_CPT; | |
1709 | break; | |
1710 | case DP_TRAINING_PATTERN_2: | |
1711 | dp_reg_value |= DP_LINK_TRAIN_PAT_2_CPT; | |
1712 | break; | |
1713 | case DP_TRAINING_PATTERN_3: | |
1714 | DRM_ERROR("DP training pattern 3 not supported\n"); | |
1715 | dp_reg_value |= DP_LINK_TRAIN_PAT_2_CPT; | |
1716 | break; | |
1717 | } | |
1718 | ||
1719 | } else { | |
1720 | dp_reg_value &= ~DP_LINK_TRAIN_MASK; | |
1721 | ||
1722 | switch (dp_train_pat & DP_TRAINING_PATTERN_MASK) { | |
1723 | case DP_TRAINING_PATTERN_DISABLE: | |
1724 | dp_reg_value |= DP_LINK_TRAIN_OFF; | |
1725 | break; | |
1726 | case DP_TRAINING_PATTERN_1: | |
1727 | dp_reg_value |= DP_LINK_TRAIN_PAT_1; | |
1728 | break; | |
1729 | case DP_TRAINING_PATTERN_2: | |
1730 | dp_reg_value |= DP_LINK_TRAIN_PAT_2; | |
1731 | break; | |
1732 | case DP_TRAINING_PATTERN_3: | |
1733 | DRM_ERROR("DP training pattern 3 not supported\n"); | |
1734 | dp_reg_value |= DP_LINK_TRAIN_PAT_2; | |
1735 | break; | |
1736 | } | |
1737 | } | |
1738 | ||
ea5b213a CW |
1739 | I915_WRITE(intel_dp->output_reg, dp_reg_value); |
1740 | POSTING_READ(intel_dp->output_reg); | |
a4fc5ed6 | 1741 | |
ea5b213a | 1742 | intel_dp_aux_native_write_1(intel_dp, |
a4fc5ed6 KP |
1743 | DP_TRAINING_PATTERN_SET, |
1744 | dp_train_pat); | |
1745 | ||
47ea7542 PZ |
1746 | if ((dp_train_pat & DP_TRAINING_PATTERN_MASK) != |
1747 | DP_TRAINING_PATTERN_DISABLE) { | |
1748 | ret = intel_dp_aux_native_write(intel_dp, | |
1749 | DP_TRAINING_LANE0_SET, | |
1750 | intel_dp->train_set, | |
1751 | intel_dp->lane_count); | |
1752 | if (ret != intel_dp->lane_count) | |
1753 | return false; | |
1754 | } | |
a4fc5ed6 KP |
1755 | |
1756 | return true; | |
1757 | } | |
1758 | ||
33a34e4e | 1759 | /* Enable corresponding port and start training pattern 1 */ |
c19b0669 | 1760 | void |
33a34e4e | 1761 | intel_dp_start_link_train(struct intel_dp *intel_dp) |
a4fc5ed6 | 1762 | { |
c19b0669 PZ |
1763 | struct drm_encoder *encoder = &intel_dp->base.base; |
1764 | struct drm_device *dev = encoder->dev; | |
a4fc5ed6 KP |
1765 | int i; |
1766 | uint8_t voltage; | |
1767 | bool clock_recovery = false; | |
cdb0e95b | 1768 | int voltage_tries, loop_tries; |
ea5b213a | 1769 | uint32_t DP = intel_dp->DP; |
a4fc5ed6 | 1770 | |
c19b0669 PZ |
1771 | if (IS_HASWELL(dev)) |
1772 | intel_ddi_prepare_link_retrain(encoder); | |
1773 | ||
3cf2efb1 CW |
1774 | /* Write the link configuration data */ |
1775 | intel_dp_aux_native_write(intel_dp, DP_LINK_BW_SET, | |
1776 | intel_dp->link_configuration, | |
1777 | DP_LINK_CONFIGURATION_SIZE); | |
a4fc5ed6 KP |
1778 | |
1779 | DP |= DP_PORT_EN; | |
1a2eb460 | 1780 | |
33a34e4e | 1781 | memset(intel_dp->train_set, 0, 4); |
a4fc5ed6 | 1782 | voltage = 0xff; |
cdb0e95b KP |
1783 | voltage_tries = 0; |
1784 | loop_tries = 0; | |
a4fc5ed6 KP |
1785 | clock_recovery = false; |
1786 | for (;;) { | |
33a34e4e | 1787 | /* Use intel_dp->train_set[0] to set the voltage and pre emphasis values */ |
93f62dad | 1788 | uint8_t link_status[DP_LINK_STATUS_SIZE]; |
e3421a18 | 1789 | uint32_t signal_levels; |
417e822d | 1790 | |
d6c0d722 PZ |
1791 | if (IS_HASWELL(dev)) { |
1792 | signal_levels = intel_dp_signal_levels_hsw( | |
1793 | intel_dp->train_set[0]); | |
1794 | DP = (DP & ~DDI_BUF_EMP_MASK) | signal_levels; | |
1795 | } else if (IS_GEN7(dev) && is_cpu_edp(intel_dp) && !IS_VALLEYVIEW(dev)) { | |
1a2eb460 KP |
1796 | signal_levels = intel_gen7_edp_signal_levels(intel_dp->train_set[0]); |
1797 | DP = (DP & ~EDP_LINK_TRAIN_VOL_EMP_MASK_IVB) | signal_levels; | |
1798 | } else if (IS_GEN6(dev) && is_cpu_edp(intel_dp)) { | |
33a34e4e | 1799 | signal_levels = intel_gen6_edp_signal_levels(intel_dp->train_set[0]); |
e3421a18 ZW |
1800 | DP = (DP & ~EDP_LINK_TRAIN_VOL_EMP_MASK_SNB) | signal_levels; |
1801 | } else { | |
93f62dad | 1802 | signal_levels = intel_dp_signal_levels(intel_dp->train_set[0]); |
e3421a18 ZW |
1803 | DP = (DP & ~(DP_VOLTAGE_MASK|DP_PRE_EMPHASIS_MASK)) | signal_levels; |
1804 | } | |
d6c0d722 PZ |
1805 | DRM_DEBUG_KMS("training pattern 1 signal levels %08x\n", |
1806 | signal_levels); | |
a4fc5ed6 | 1807 | |
a7c9655f | 1808 | /* Set training pattern 1 */ |
47ea7542 | 1809 | if (!intel_dp_set_link_train(intel_dp, DP, |
81055854 AJ |
1810 | DP_TRAINING_PATTERN_1 | |
1811 | DP_LINK_SCRAMBLING_DISABLE)) | |
a4fc5ed6 | 1812 | break; |
a4fc5ed6 | 1813 | |
a7c9655f | 1814 | drm_dp_link_train_clock_recovery_delay(intel_dp->dpcd); |
93f62dad KP |
1815 | if (!intel_dp_get_link_status(intel_dp, link_status)) { |
1816 | DRM_ERROR("failed to get link status\n"); | |
a4fc5ed6 | 1817 | break; |
93f62dad | 1818 | } |
a4fc5ed6 | 1819 | |
01916270 | 1820 | if (drm_dp_clock_recovery_ok(link_status, intel_dp->lane_count)) { |
93f62dad | 1821 | DRM_DEBUG_KMS("clock recovery OK\n"); |
3cf2efb1 CW |
1822 | clock_recovery = true; |
1823 | break; | |
1824 | } | |
1825 | ||
1826 | /* Check to see if we've tried the max voltage */ | |
1827 | for (i = 0; i < intel_dp->lane_count; i++) | |
1828 | if ((intel_dp->train_set[i] & DP_TRAIN_MAX_SWING_REACHED) == 0) | |
a4fc5ed6 | 1829 | break; |
0d710688 | 1830 | if (i == intel_dp->lane_count && voltage_tries == 5) { |
24773670 | 1831 | if (++loop_tries == 5) { |
cdb0e95b KP |
1832 | DRM_DEBUG_KMS("too many full retries, give up\n"); |
1833 | break; | |
1834 | } | |
1835 | memset(intel_dp->train_set, 0, 4); | |
1836 | voltage_tries = 0; | |
1837 | continue; | |
1838 | } | |
a4fc5ed6 | 1839 | |
3cf2efb1 | 1840 | /* Check to see if we've tried the same voltage 5 times */ |
24773670 CW |
1841 | if ((intel_dp->train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK) != voltage) { |
1842 | voltage = intel_dp->train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK; | |
cdb0e95b | 1843 | voltage_tries = 0; |
24773670 CW |
1844 | } else |
1845 | ++voltage_tries; | |
a4fc5ed6 | 1846 | |
3cf2efb1 | 1847 | /* Compute new intel_dp->train_set as requested by target */ |
93f62dad | 1848 | intel_get_adjust_train(intel_dp, link_status); |
a4fc5ed6 KP |
1849 | } |
1850 | ||
33a34e4e JB |
1851 | intel_dp->DP = DP; |
1852 | } | |
1853 | ||
c19b0669 | 1854 | void |
33a34e4e JB |
1855 | intel_dp_complete_link_train(struct intel_dp *intel_dp) |
1856 | { | |
4ef69c7a | 1857 | struct drm_device *dev = intel_dp->base.base.dev; |
33a34e4e | 1858 | bool channel_eq = false; |
37f80975 | 1859 | int tries, cr_tries; |
33a34e4e JB |
1860 | uint32_t DP = intel_dp->DP; |
1861 | ||
a4fc5ed6 KP |
1862 | /* channel equalization */ |
1863 | tries = 0; | |
37f80975 | 1864 | cr_tries = 0; |
a4fc5ed6 KP |
1865 | channel_eq = false; |
1866 | for (;;) { | |
33a34e4e | 1867 | /* Use intel_dp->train_set[0] to set the voltage and pre emphasis values */ |
e3421a18 | 1868 | uint32_t signal_levels; |
93f62dad | 1869 | uint8_t link_status[DP_LINK_STATUS_SIZE]; |
e3421a18 | 1870 | |
37f80975 JB |
1871 | if (cr_tries > 5) { |
1872 | DRM_ERROR("failed to train DP, aborting\n"); | |
1873 | intel_dp_link_down(intel_dp); | |
1874 | break; | |
1875 | } | |
1876 | ||
d6c0d722 PZ |
1877 | if (IS_HASWELL(dev)) { |
1878 | signal_levels = intel_dp_signal_levels_hsw(intel_dp->train_set[0]); | |
1879 | DP = (DP & ~DDI_BUF_EMP_MASK) | signal_levels; | |
1880 | } else if (IS_GEN7(dev) && is_cpu_edp(intel_dp) && !IS_VALLEYVIEW(dev)) { | |
1a2eb460 KP |
1881 | signal_levels = intel_gen7_edp_signal_levels(intel_dp->train_set[0]); |
1882 | DP = (DP & ~EDP_LINK_TRAIN_VOL_EMP_MASK_IVB) | signal_levels; | |
1883 | } else if (IS_GEN6(dev) && is_cpu_edp(intel_dp)) { | |
33a34e4e | 1884 | signal_levels = intel_gen6_edp_signal_levels(intel_dp->train_set[0]); |
e3421a18 ZW |
1885 | DP = (DP & ~EDP_LINK_TRAIN_VOL_EMP_MASK_SNB) | signal_levels; |
1886 | } else { | |
93f62dad | 1887 | signal_levels = intel_dp_signal_levels(intel_dp->train_set[0]); |
e3421a18 ZW |
1888 | DP = (DP & ~(DP_VOLTAGE_MASK|DP_PRE_EMPHASIS_MASK)) | signal_levels; |
1889 | } | |
1890 | ||
a4fc5ed6 | 1891 | /* channel eq pattern */ |
47ea7542 | 1892 | if (!intel_dp_set_link_train(intel_dp, DP, |
81055854 AJ |
1893 | DP_TRAINING_PATTERN_2 | |
1894 | DP_LINK_SCRAMBLING_DISABLE)) | |
a4fc5ed6 KP |
1895 | break; |
1896 | ||
a7c9655f | 1897 | drm_dp_link_train_channel_eq_delay(intel_dp->dpcd); |
93f62dad | 1898 | if (!intel_dp_get_link_status(intel_dp, link_status)) |
a4fc5ed6 | 1899 | break; |
a4fc5ed6 | 1900 | |
37f80975 | 1901 | /* Make sure clock is still ok */ |
01916270 | 1902 | if (!drm_dp_clock_recovery_ok(link_status, intel_dp->lane_count)) { |
37f80975 JB |
1903 | intel_dp_start_link_train(intel_dp); |
1904 | cr_tries++; | |
1905 | continue; | |
1906 | } | |
1907 | ||
1ffdff13 | 1908 | if (drm_dp_channel_eq_ok(link_status, intel_dp->lane_count)) { |
3cf2efb1 CW |
1909 | channel_eq = true; |
1910 | break; | |
1911 | } | |
a4fc5ed6 | 1912 | |
37f80975 JB |
1913 | /* Try 5 times, then try clock recovery if that fails */ |
1914 | if (tries > 5) { | |
1915 | intel_dp_link_down(intel_dp); | |
1916 | intel_dp_start_link_train(intel_dp); | |
1917 | tries = 0; | |
1918 | cr_tries++; | |
1919 | continue; | |
1920 | } | |
a4fc5ed6 | 1921 | |
3cf2efb1 | 1922 | /* Compute new intel_dp->train_set as requested by target */ |
93f62dad | 1923 | intel_get_adjust_train(intel_dp, link_status); |
3cf2efb1 | 1924 | ++tries; |
869184a6 | 1925 | } |
3cf2efb1 | 1926 | |
d6c0d722 PZ |
1927 | if (channel_eq) |
1928 | DRM_DEBUG_KMS("Channel EQ done. DP Training successfull\n"); | |
1929 | ||
47ea7542 | 1930 | intel_dp_set_link_train(intel_dp, DP, DP_TRAINING_PATTERN_DISABLE); |
a4fc5ed6 KP |
1931 | } |
1932 | ||
1933 | static void | |
ea5b213a | 1934 | intel_dp_link_down(struct intel_dp *intel_dp) |
a4fc5ed6 | 1935 | { |
4ef69c7a | 1936 | struct drm_device *dev = intel_dp->base.base.dev; |
a4fc5ed6 | 1937 | struct drm_i915_private *dev_priv = dev->dev_private; |
ea5b213a | 1938 | uint32_t DP = intel_dp->DP; |
a4fc5ed6 | 1939 | |
c19b0669 PZ |
1940 | /* |
1941 | * DDI code has a strict mode set sequence and we should try to respect | |
1942 | * it, otherwise we might hang the machine in many different ways. So we | |
1943 | * really should be disabling the port only on a complete crtc_disable | |
1944 | * sequence. This function is just called under two conditions on DDI | |
1945 | * code: | |
1946 | * - Link train failed while doing crtc_enable, and on this case we | |
1947 | * really should respect the mode set sequence and wait for a | |
1948 | * crtc_disable. | |
1949 | * - Someone turned the monitor off and intel_dp_check_link_status | |
1950 | * called us. We don't need to disable the whole port on this case, so | |
1951 | * when someone turns the monitor on again, | |
1952 | * intel_ddi_prepare_link_retrain will take care of redoing the link | |
1953 | * train. | |
1954 | */ | |
1955 | if (IS_HASWELL(dev)) | |
1956 | return; | |
1957 | ||
0c33d8d7 | 1958 | if (WARN_ON((I915_READ(intel_dp->output_reg) & DP_PORT_EN) == 0)) |
1b39d6f3 CW |
1959 | return; |
1960 | ||
28c97730 | 1961 | DRM_DEBUG_KMS("\n"); |
32f9d658 | 1962 | |
1a2eb460 | 1963 | if (HAS_PCH_CPT(dev) && (IS_GEN7(dev) || !is_cpu_edp(intel_dp))) { |
e3421a18 | 1964 | DP &= ~DP_LINK_TRAIN_MASK_CPT; |
ea5b213a | 1965 | I915_WRITE(intel_dp->output_reg, DP | DP_LINK_TRAIN_PAT_IDLE_CPT); |
e3421a18 ZW |
1966 | } else { |
1967 | DP &= ~DP_LINK_TRAIN_MASK; | |
ea5b213a | 1968 | I915_WRITE(intel_dp->output_reg, DP | DP_LINK_TRAIN_PAT_IDLE); |
e3421a18 | 1969 | } |
fe255d00 | 1970 | POSTING_READ(intel_dp->output_reg); |
5eb08b69 | 1971 | |
fe255d00 | 1972 | msleep(17); |
5eb08b69 | 1973 | |
493a7081 | 1974 | if (HAS_PCH_IBX(dev) && |
1b39d6f3 | 1975 | I915_READ(intel_dp->output_reg) & DP_PIPEB_SELECT) { |
31acbcc4 CW |
1976 | struct drm_crtc *crtc = intel_dp->base.base.crtc; |
1977 | ||
5bddd17f EA |
1978 | /* Hardware workaround: leaving our transcoder select |
1979 | * set to transcoder B while it's off will prevent the | |
1980 | * corresponding HDMI output on transcoder A. | |
1981 | * | |
1982 | * Combine this with another hardware workaround: | |
1983 | * transcoder select bit can only be cleared while the | |
1984 | * port is enabled. | |
1985 | */ | |
1986 | DP &= ~DP_PIPEB_SELECT; | |
1987 | I915_WRITE(intel_dp->output_reg, DP); | |
1988 | ||
1989 | /* Changes to enable or select take place the vblank | |
1990 | * after being written. | |
1991 | */ | |
31acbcc4 CW |
1992 | if (crtc == NULL) { |
1993 | /* We can arrive here never having been attached | |
1994 | * to a CRTC, for instance, due to inheriting | |
1995 | * random state from the BIOS. | |
1996 | * | |
1997 | * If the pipe is not running, play safe and | |
1998 | * wait for the clocks to stabilise before | |
1999 | * continuing. | |
2000 | */ | |
2001 | POSTING_READ(intel_dp->output_reg); | |
2002 | msleep(50); | |
2003 | } else | |
2004 | intel_wait_for_vblank(dev, to_intel_crtc(crtc)->pipe); | |
5bddd17f EA |
2005 | } |
2006 | ||
832afda6 | 2007 | DP &= ~DP_AUDIO_OUTPUT_ENABLE; |
ea5b213a CW |
2008 | I915_WRITE(intel_dp->output_reg, DP & ~DP_PORT_EN); |
2009 | POSTING_READ(intel_dp->output_reg); | |
f01eca2e | 2010 | msleep(intel_dp->panel_power_down_delay); |
a4fc5ed6 KP |
2011 | } |
2012 | ||
26d61aad KP |
2013 | static bool |
2014 | intel_dp_get_dpcd(struct intel_dp *intel_dp) | |
92fd8fd1 | 2015 | { |
92fd8fd1 | 2016 | if (intel_dp_aux_native_read_retry(intel_dp, 0x000, intel_dp->dpcd, |
b091cd92 AJ |
2017 | sizeof(intel_dp->dpcd)) == 0) |
2018 | return false; /* aux transfer failed */ | |
92fd8fd1 | 2019 | |
b091cd92 AJ |
2020 | if (intel_dp->dpcd[DP_DPCD_REV] == 0) |
2021 | return false; /* DPCD not present */ | |
2022 | ||
2023 | if (!(intel_dp->dpcd[DP_DOWNSTREAMPORT_PRESENT] & | |
2024 | DP_DWN_STRM_PORT_PRESENT)) | |
2025 | return true; /* native DP sink */ | |
2026 | ||
2027 | if (intel_dp->dpcd[DP_DPCD_REV] == 0x10) | |
2028 | return true; /* no per-port downstream info */ | |
2029 | ||
2030 | if (intel_dp_aux_native_read_retry(intel_dp, DP_DOWNSTREAM_PORT_0, | |
2031 | intel_dp->downstream_ports, | |
2032 | DP_MAX_DOWNSTREAM_PORTS) == 0) | |
2033 | return false; /* downstream port status fetch failed */ | |
2034 | ||
2035 | return true; | |
92fd8fd1 KP |
2036 | } |
2037 | ||
0d198328 AJ |
2038 | static void |
2039 | intel_dp_probe_oui(struct intel_dp *intel_dp) | |
2040 | { | |
2041 | u8 buf[3]; | |
2042 | ||
2043 | if (!(intel_dp->dpcd[DP_DOWN_STREAM_PORT_COUNT] & DP_OUI_SUPPORT)) | |
2044 | return; | |
2045 | ||
351cfc34 DV |
2046 | ironlake_edp_panel_vdd_on(intel_dp); |
2047 | ||
0d198328 AJ |
2048 | if (intel_dp_aux_native_read_retry(intel_dp, DP_SINK_OUI, buf, 3)) |
2049 | DRM_DEBUG_KMS("Sink OUI: %02hx%02hx%02hx\n", | |
2050 | buf[0], buf[1], buf[2]); | |
2051 | ||
2052 | if (intel_dp_aux_native_read_retry(intel_dp, DP_BRANCH_OUI, buf, 3)) | |
2053 | DRM_DEBUG_KMS("Branch OUI: %02hx%02hx%02hx\n", | |
2054 | buf[0], buf[1], buf[2]); | |
351cfc34 DV |
2055 | |
2056 | ironlake_edp_panel_vdd_off(intel_dp, false); | |
0d198328 AJ |
2057 | } |
2058 | ||
a60f0e38 JB |
2059 | static bool |
2060 | intel_dp_get_sink_irq(struct intel_dp *intel_dp, u8 *sink_irq_vector) | |
2061 | { | |
2062 | int ret; | |
2063 | ||
2064 | ret = intel_dp_aux_native_read_retry(intel_dp, | |
2065 | DP_DEVICE_SERVICE_IRQ_VECTOR, | |
2066 | sink_irq_vector, 1); | |
2067 | if (!ret) | |
2068 | return false; | |
2069 | ||
2070 | return true; | |
2071 | } | |
2072 | ||
2073 | static void | |
2074 | intel_dp_handle_test_request(struct intel_dp *intel_dp) | |
2075 | { | |
2076 | /* NAK by default */ | |
9324cf7f | 2077 | intel_dp_aux_native_write_1(intel_dp, DP_TEST_RESPONSE, DP_TEST_NAK); |
a60f0e38 JB |
2078 | } |
2079 | ||
a4fc5ed6 KP |
2080 | /* |
2081 | * According to DP spec | |
2082 | * 5.1.2: | |
2083 | * 1. Read DPCD | |
2084 | * 2. Configure link according to Receiver Capabilities | |
2085 | * 3. Use Link Training from 2.5.3.3 and 3.5.1.3 | |
2086 | * 4. Check link status on receipt of hot-plug interrupt | |
2087 | */ | |
2088 | ||
2089 | static void | |
ea5b213a | 2090 | intel_dp_check_link_status(struct intel_dp *intel_dp) |
a4fc5ed6 | 2091 | { |
a60f0e38 | 2092 | u8 sink_irq_vector; |
93f62dad | 2093 | u8 link_status[DP_LINK_STATUS_SIZE]; |
a60f0e38 | 2094 | |
24e804ba | 2095 | if (!intel_dp->base.connectors_active) |
d2b996ac | 2096 | return; |
59cd09e1 | 2097 | |
24e804ba | 2098 | if (WARN_ON(!intel_dp->base.base.crtc)) |
a4fc5ed6 KP |
2099 | return; |
2100 | ||
92fd8fd1 | 2101 | /* Try to read receiver status if the link appears to be up */ |
93f62dad | 2102 | if (!intel_dp_get_link_status(intel_dp, link_status)) { |
ea5b213a | 2103 | intel_dp_link_down(intel_dp); |
a4fc5ed6 KP |
2104 | return; |
2105 | } | |
2106 | ||
92fd8fd1 | 2107 | /* Now read the DPCD to see if it's actually running */ |
26d61aad | 2108 | if (!intel_dp_get_dpcd(intel_dp)) { |
59cd09e1 JB |
2109 | intel_dp_link_down(intel_dp); |
2110 | return; | |
2111 | } | |
2112 | ||
a60f0e38 JB |
2113 | /* Try to read the source of the interrupt */ |
2114 | if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11 && | |
2115 | intel_dp_get_sink_irq(intel_dp, &sink_irq_vector)) { | |
2116 | /* Clear interrupt source */ | |
2117 | intel_dp_aux_native_write_1(intel_dp, | |
2118 | DP_DEVICE_SERVICE_IRQ_VECTOR, | |
2119 | sink_irq_vector); | |
2120 | ||
2121 | if (sink_irq_vector & DP_AUTOMATED_TEST_REQUEST) | |
2122 | intel_dp_handle_test_request(intel_dp); | |
2123 | if (sink_irq_vector & (DP_CP_IRQ | DP_SINK_SPECIFIC_IRQ)) | |
2124 | DRM_DEBUG_DRIVER("CP or sink specific irq unhandled\n"); | |
2125 | } | |
2126 | ||
1ffdff13 | 2127 | if (!drm_dp_channel_eq_ok(link_status, intel_dp->lane_count)) { |
92fd8fd1 KP |
2128 | DRM_DEBUG_KMS("%s: channel EQ not ok, retraining\n", |
2129 | drm_get_encoder_name(&intel_dp->base.base)); | |
33a34e4e JB |
2130 | intel_dp_start_link_train(intel_dp); |
2131 | intel_dp_complete_link_train(intel_dp); | |
2132 | } | |
a4fc5ed6 | 2133 | } |
a4fc5ed6 | 2134 | |
07d3dc18 | 2135 | /* XXX this is probably wrong for multiple downstream ports */ |
71ba9000 | 2136 | static enum drm_connector_status |
26d61aad | 2137 | intel_dp_detect_dpcd(struct intel_dp *intel_dp) |
71ba9000 | 2138 | { |
07d3dc18 AJ |
2139 | uint8_t *dpcd = intel_dp->dpcd; |
2140 | bool hpd; | |
2141 | uint8_t type; | |
2142 | ||
2143 | if (!intel_dp_get_dpcd(intel_dp)) | |
2144 | return connector_status_disconnected; | |
2145 | ||
2146 | /* if there's no downstream port, we're done */ | |
2147 | if (!(dpcd[DP_DOWNSTREAMPORT_PRESENT] & DP_DWN_STRM_PORT_PRESENT)) | |
2148 | return connector_status_connected; | |
2149 | ||
2150 | /* If we're HPD-aware, SINK_COUNT changes dynamically */ | |
2151 | hpd = !!(intel_dp->downstream_ports[0] & DP_DS_PORT_HPD); | |
2152 | if (hpd) { | |
da131a46 | 2153 | uint8_t reg; |
07d3dc18 | 2154 | if (!intel_dp_aux_native_read_retry(intel_dp, DP_SINK_COUNT, |
da131a46 | 2155 | ®, 1)) |
07d3dc18 | 2156 | return connector_status_unknown; |
da131a46 AJ |
2157 | return DP_GET_SINK_COUNT(reg) ? connector_status_connected |
2158 | : connector_status_disconnected; | |
07d3dc18 AJ |
2159 | } |
2160 | ||
2161 | /* If no HPD, poke DDC gently */ | |
2162 | if (drm_probe_ddc(&intel_dp->adapter)) | |
26d61aad | 2163 | return connector_status_connected; |
07d3dc18 AJ |
2164 | |
2165 | /* Well we tried, say unknown for unreliable port types */ | |
2166 | type = intel_dp->downstream_ports[0] & DP_DS_PORT_TYPE_MASK; | |
2167 | if (type == DP_DS_PORT_TYPE_VGA || type == DP_DS_PORT_TYPE_NON_EDID) | |
2168 | return connector_status_unknown; | |
2169 | ||
2170 | /* Anything else is out of spec, warn and ignore */ | |
2171 | DRM_DEBUG_KMS("Broken DP branch device, ignoring\n"); | |
26d61aad | 2172 | return connector_status_disconnected; |
71ba9000 AJ |
2173 | } |
2174 | ||
5eb08b69 | 2175 | static enum drm_connector_status |
a9756bb5 | 2176 | ironlake_dp_detect(struct intel_dp *intel_dp) |
5eb08b69 | 2177 | { |
5eb08b69 ZW |
2178 | enum drm_connector_status status; |
2179 | ||
fe16d949 CW |
2180 | /* Can't disconnect eDP, but you can close the lid... */ |
2181 | if (is_edp(intel_dp)) { | |
2182 | status = intel_panel_detect(intel_dp->base.base.dev); | |
2183 | if (status == connector_status_unknown) | |
2184 | status = connector_status_connected; | |
2185 | return status; | |
2186 | } | |
01cb9ea6 | 2187 | |
26d61aad | 2188 | return intel_dp_detect_dpcd(intel_dp); |
5eb08b69 ZW |
2189 | } |
2190 | ||
a4fc5ed6 | 2191 | static enum drm_connector_status |
a9756bb5 | 2192 | g4x_dp_detect(struct intel_dp *intel_dp) |
a4fc5ed6 | 2193 | { |
4ef69c7a | 2194 | struct drm_device *dev = intel_dp->base.base.dev; |
a4fc5ed6 | 2195 | struct drm_i915_private *dev_priv = dev->dev_private; |
10f76a38 | 2196 | uint32_t bit; |
5eb08b69 | 2197 | |
ea5b213a | 2198 | switch (intel_dp->output_reg) { |
a4fc5ed6 | 2199 | case DP_B: |
10f76a38 | 2200 | bit = DPB_HOTPLUG_LIVE_STATUS; |
a4fc5ed6 KP |
2201 | break; |
2202 | case DP_C: | |
10f76a38 | 2203 | bit = DPC_HOTPLUG_LIVE_STATUS; |
a4fc5ed6 KP |
2204 | break; |
2205 | case DP_D: | |
10f76a38 | 2206 | bit = DPD_HOTPLUG_LIVE_STATUS; |
a4fc5ed6 KP |
2207 | break; |
2208 | default: | |
2209 | return connector_status_unknown; | |
2210 | } | |
2211 | ||
10f76a38 | 2212 | if ((I915_READ(PORT_HOTPLUG_STAT) & bit) == 0) |
a4fc5ed6 KP |
2213 | return connector_status_disconnected; |
2214 | ||
26d61aad | 2215 | return intel_dp_detect_dpcd(intel_dp); |
a9756bb5 ZW |
2216 | } |
2217 | ||
8c241fef KP |
2218 | static struct edid * |
2219 | intel_dp_get_edid(struct drm_connector *connector, struct i2c_adapter *adapter) | |
2220 | { | |
9cd300e0 | 2221 | struct intel_connector *intel_connector = to_intel_connector(connector); |
d6f24d0f | 2222 | |
9cd300e0 JN |
2223 | /* use cached edid if we have one */ |
2224 | if (intel_connector->edid) { | |
2225 | struct edid *edid; | |
2226 | int size; | |
2227 | ||
2228 | /* invalid edid */ | |
2229 | if (IS_ERR(intel_connector->edid)) | |
d6f24d0f JB |
2230 | return NULL; |
2231 | ||
9cd300e0 | 2232 | size = (intel_connector->edid->extensions + 1) * EDID_LENGTH; |
d6f24d0f JB |
2233 | edid = kmalloc(size, GFP_KERNEL); |
2234 | if (!edid) | |
2235 | return NULL; | |
2236 | ||
9cd300e0 | 2237 | memcpy(edid, intel_connector->edid, size); |
d6f24d0f JB |
2238 | return edid; |
2239 | } | |
8c241fef | 2240 | |
9cd300e0 | 2241 | return drm_get_edid(connector, adapter); |
8c241fef KP |
2242 | } |
2243 | ||
2244 | static int | |
2245 | intel_dp_get_edid_modes(struct drm_connector *connector, struct i2c_adapter *adapter) | |
2246 | { | |
9cd300e0 | 2247 | struct intel_connector *intel_connector = to_intel_connector(connector); |
8c241fef | 2248 | |
9cd300e0 JN |
2249 | /* use cached edid if we have one */ |
2250 | if (intel_connector->edid) { | |
2251 | /* invalid edid */ | |
2252 | if (IS_ERR(intel_connector->edid)) | |
2253 | return 0; | |
2254 | ||
2255 | return intel_connector_update_modes(connector, | |
2256 | intel_connector->edid); | |
d6f24d0f JB |
2257 | } |
2258 | ||
9cd300e0 | 2259 | return intel_ddc_get_modes(connector, adapter); |
8c241fef KP |
2260 | } |
2261 | ||
2262 | ||
a9756bb5 ZW |
2263 | /** |
2264 | * Uses CRT_HOTPLUG_EN and CRT_HOTPLUG_STAT to detect DP connection. | |
2265 | * | |
2266 | * \return true if DP port is connected. | |
2267 | * \return false if DP port is disconnected. | |
2268 | */ | |
2269 | static enum drm_connector_status | |
2270 | intel_dp_detect(struct drm_connector *connector, bool force) | |
2271 | { | |
2272 | struct intel_dp *intel_dp = intel_attached_dp(connector); | |
2273 | struct drm_device *dev = intel_dp->base.base.dev; | |
2274 | enum drm_connector_status status; | |
2275 | struct edid *edid = NULL; | |
2276 | ||
2277 | intel_dp->has_audio = false; | |
2278 | ||
2279 | if (HAS_PCH_SPLIT(dev)) | |
2280 | status = ironlake_dp_detect(intel_dp); | |
2281 | else | |
2282 | status = g4x_dp_detect(intel_dp); | |
1b9be9d0 | 2283 | |
ac66ae83 AJ |
2284 | DRM_DEBUG_KMS("DPCD: %02hx%02hx%02hx%02hx%02hx%02hx%02hx%02hx\n", |
2285 | intel_dp->dpcd[0], intel_dp->dpcd[1], intel_dp->dpcd[2], | |
2286 | intel_dp->dpcd[3], intel_dp->dpcd[4], intel_dp->dpcd[5], | |
2287 | intel_dp->dpcd[6], intel_dp->dpcd[7]); | |
1b9be9d0 | 2288 | |
a9756bb5 ZW |
2289 | if (status != connector_status_connected) |
2290 | return status; | |
2291 | ||
0d198328 AJ |
2292 | intel_dp_probe_oui(intel_dp); |
2293 | ||
c3e5f67b DV |
2294 | if (intel_dp->force_audio != HDMI_AUDIO_AUTO) { |
2295 | intel_dp->has_audio = (intel_dp->force_audio == HDMI_AUDIO_ON); | |
f684960e | 2296 | } else { |
8c241fef | 2297 | edid = intel_dp_get_edid(connector, &intel_dp->adapter); |
f684960e CW |
2298 | if (edid) { |
2299 | intel_dp->has_audio = drm_detect_monitor_audio(edid); | |
f684960e CW |
2300 | kfree(edid); |
2301 | } | |
a9756bb5 ZW |
2302 | } |
2303 | ||
2304 | return connector_status_connected; | |
a4fc5ed6 KP |
2305 | } |
2306 | ||
2307 | static int intel_dp_get_modes(struct drm_connector *connector) | |
2308 | { | |
df0e9248 | 2309 | struct intel_dp *intel_dp = intel_attached_dp(connector); |
dd06f90e | 2310 | struct intel_connector *intel_connector = to_intel_connector(connector); |
4ef69c7a | 2311 | struct drm_device *dev = intel_dp->base.base.dev; |
32f9d658 | 2312 | int ret; |
a4fc5ed6 KP |
2313 | |
2314 | /* We should parse the EDID data and find out if it has an audio sink | |
2315 | */ | |
2316 | ||
8c241fef | 2317 | ret = intel_dp_get_edid_modes(connector, &intel_dp->adapter); |
f8779fda | 2318 | if (ret) |
32f9d658 ZW |
2319 | return ret; |
2320 | ||
f8779fda | 2321 | /* if eDP has no EDID, fall back to fixed mode */ |
dd06f90e | 2322 | if (is_edp(intel_dp) && intel_connector->panel.fixed_mode) { |
f8779fda | 2323 | struct drm_display_mode *mode; |
dd06f90e JN |
2324 | mode = drm_mode_duplicate(dev, |
2325 | intel_connector->panel.fixed_mode); | |
f8779fda | 2326 | if (mode) { |
32f9d658 ZW |
2327 | drm_mode_probed_add(connector, mode); |
2328 | return 1; | |
2329 | } | |
2330 | } | |
2331 | return 0; | |
a4fc5ed6 KP |
2332 | } |
2333 | ||
1aad7ac0 CW |
2334 | static bool |
2335 | intel_dp_detect_audio(struct drm_connector *connector) | |
2336 | { | |
2337 | struct intel_dp *intel_dp = intel_attached_dp(connector); | |
2338 | struct edid *edid; | |
2339 | bool has_audio = false; | |
2340 | ||
8c241fef | 2341 | edid = intel_dp_get_edid(connector, &intel_dp->adapter); |
1aad7ac0 CW |
2342 | if (edid) { |
2343 | has_audio = drm_detect_monitor_audio(edid); | |
1aad7ac0 CW |
2344 | kfree(edid); |
2345 | } | |
2346 | ||
2347 | return has_audio; | |
2348 | } | |
2349 | ||
f684960e CW |
2350 | static int |
2351 | intel_dp_set_property(struct drm_connector *connector, | |
2352 | struct drm_property *property, | |
2353 | uint64_t val) | |
2354 | { | |
e953fd7b | 2355 | struct drm_i915_private *dev_priv = connector->dev->dev_private; |
f684960e CW |
2356 | struct intel_dp *intel_dp = intel_attached_dp(connector); |
2357 | int ret; | |
2358 | ||
2359 | ret = drm_connector_property_set_value(connector, property, val); | |
2360 | if (ret) | |
2361 | return ret; | |
2362 | ||
3f43c48d | 2363 | if (property == dev_priv->force_audio_property) { |
1aad7ac0 CW |
2364 | int i = val; |
2365 | bool has_audio; | |
2366 | ||
2367 | if (i == intel_dp->force_audio) | |
f684960e CW |
2368 | return 0; |
2369 | ||
1aad7ac0 | 2370 | intel_dp->force_audio = i; |
f684960e | 2371 | |
c3e5f67b | 2372 | if (i == HDMI_AUDIO_AUTO) |
1aad7ac0 CW |
2373 | has_audio = intel_dp_detect_audio(connector); |
2374 | else | |
c3e5f67b | 2375 | has_audio = (i == HDMI_AUDIO_ON); |
1aad7ac0 CW |
2376 | |
2377 | if (has_audio == intel_dp->has_audio) | |
f684960e CW |
2378 | return 0; |
2379 | ||
1aad7ac0 | 2380 | intel_dp->has_audio = has_audio; |
f684960e CW |
2381 | goto done; |
2382 | } | |
2383 | ||
e953fd7b CW |
2384 | if (property == dev_priv->broadcast_rgb_property) { |
2385 | if (val == !!intel_dp->color_range) | |
2386 | return 0; | |
2387 | ||
2388 | intel_dp->color_range = val ? DP_COLOR_RANGE_16_235 : 0; | |
2389 | goto done; | |
2390 | } | |
2391 | ||
f684960e CW |
2392 | return -EINVAL; |
2393 | ||
2394 | done: | |
2395 | if (intel_dp->base.base.crtc) { | |
2396 | struct drm_crtc *crtc = intel_dp->base.base.crtc; | |
a6778b3c DV |
2397 | intel_set_mode(crtc, &crtc->mode, |
2398 | crtc->x, crtc->y, crtc->fb); | |
f684960e CW |
2399 | } |
2400 | ||
2401 | return 0; | |
2402 | } | |
2403 | ||
a4fc5ed6 | 2404 | static void |
0206e353 | 2405 | intel_dp_destroy(struct drm_connector *connector) |
a4fc5ed6 | 2406 | { |
aaa6fd2a | 2407 | struct drm_device *dev = connector->dev; |
be3cd5e3 | 2408 | struct intel_dp *intel_dp = intel_attached_dp(connector); |
1d508706 | 2409 | struct intel_connector *intel_connector = to_intel_connector(connector); |
aaa6fd2a | 2410 | |
9cd300e0 JN |
2411 | if (!IS_ERR_OR_NULL(intel_connector->edid)) |
2412 | kfree(intel_connector->edid); | |
2413 | ||
1d508706 | 2414 | if (is_edp(intel_dp)) { |
aaa6fd2a | 2415 | intel_panel_destroy_backlight(dev); |
1d508706 JN |
2416 | intel_panel_fini(&intel_connector->panel); |
2417 | } | |
aaa6fd2a | 2418 | |
a4fc5ed6 KP |
2419 | drm_sysfs_connector_remove(connector); |
2420 | drm_connector_cleanup(connector); | |
55f78c43 | 2421 | kfree(connector); |
a4fc5ed6 KP |
2422 | } |
2423 | ||
24d05927 DV |
2424 | static void intel_dp_encoder_destroy(struct drm_encoder *encoder) |
2425 | { | |
2426 | struct intel_dp *intel_dp = enc_to_intel_dp(encoder); | |
2427 | ||
2428 | i2c_del_adapter(&intel_dp->adapter); | |
2429 | drm_encoder_cleanup(encoder); | |
bd943159 KP |
2430 | if (is_edp(intel_dp)) { |
2431 | cancel_delayed_work_sync(&intel_dp->panel_vdd_work); | |
2432 | ironlake_panel_vdd_off_sync(intel_dp); | |
2433 | } | |
24d05927 DV |
2434 | kfree(intel_dp); |
2435 | } | |
2436 | ||
a4fc5ed6 | 2437 | static const struct drm_encoder_helper_funcs intel_dp_helper_funcs = { |
a4fc5ed6 | 2438 | .mode_fixup = intel_dp_mode_fixup, |
a4fc5ed6 | 2439 | .mode_set = intel_dp_mode_set, |
1f703855 | 2440 | .disable = intel_encoder_noop, |
a4fc5ed6 KP |
2441 | }; |
2442 | ||
a7902ac5 PZ |
2443 | static const struct drm_encoder_helper_funcs intel_dp_helper_funcs_hsw = { |
2444 | .mode_fixup = intel_dp_mode_fixup, | |
2445 | .mode_set = intel_ddi_mode_set, | |
2446 | .disable = intel_encoder_noop, | |
2447 | }; | |
2448 | ||
a4fc5ed6 | 2449 | static const struct drm_connector_funcs intel_dp_connector_funcs = { |
2bd2ad64 | 2450 | .dpms = intel_connector_dpms, |
a4fc5ed6 KP |
2451 | .detect = intel_dp_detect, |
2452 | .fill_modes = drm_helper_probe_single_connector_modes, | |
f684960e | 2453 | .set_property = intel_dp_set_property, |
a4fc5ed6 KP |
2454 | .destroy = intel_dp_destroy, |
2455 | }; | |
2456 | ||
2457 | static const struct drm_connector_helper_funcs intel_dp_connector_helper_funcs = { | |
2458 | .get_modes = intel_dp_get_modes, | |
2459 | .mode_valid = intel_dp_mode_valid, | |
df0e9248 | 2460 | .best_encoder = intel_best_encoder, |
a4fc5ed6 KP |
2461 | }; |
2462 | ||
a4fc5ed6 | 2463 | static const struct drm_encoder_funcs intel_dp_enc_funcs = { |
24d05927 | 2464 | .destroy = intel_dp_encoder_destroy, |
a4fc5ed6 KP |
2465 | }; |
2466 | ||
995b6762 | 2467 | static void |
21d40d37 | 2468 | intel_dp_hot_plug(struct intel_encoder *intel_encoder) |
c8110e52 | 2469 | { |
ea5b213a | 2470 | struct intel_dp *intel_dp = container_of(intel_encoder, struct intel_dp, base); |
c8110e52 | 2471 | |
885a5014 | 2472 | intel_dp_check_link_status(intel_dp); |
c8110e52 | 2473 | } |
6207937d | 2474 | |
e3421a18 ZW |
2475 | /* Return which DP Port should be selected for Transcoder DP control */ |
2476 | int | |
0206e353 | 2477 | intel_trans_dp_port_sel(struct drm_crtc *crtc) |
e3421a18 ZW |
2478 | { |
2479 | struct drm_device *dev = crtc->dev; | |
6c2b7c12 | 2480 | struct intel_encoder *encoder; |
e3421a18 | 2481 | |
6c2b7c12 DV |
2482 | for_each_encoder_on_crtc(dev, crtc, encoder) { |
2483 | struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base); | |
e3421a18 | 2484 | |
417e822d KP |
2485 | if (intel_dp->base.type == INTEL_OUTPUT_DISPLAYPORT || |
2486 | intel_dp->base.type == INTEL_OUTPUT_EDP) | |
ea5b213a | 2487 | return intel_dp->output_reg; |
e3421a18 | 2488 | } |
ea5b213a | 2489 | |
e3421a18 ZW |
2490 | return -1; |
2491 | } | |
2492 | ||
36e83a18 | 2493 | /* check the VBT to see whether the eDP is on DP-D port */ |
cb0953d7 | 2494 | bool intel_dpd_is_edp(struct drm_device *dev) |
36e83a18 ZY |
2495 | { |
2496 | struct drm_i915_private *dev_priv = dev->dev_private; | |
2497 | struct child_device_config *p_child; | |
2498 | int i; | |
2499 | ||
2500 | if (!dev_priv->child_dev_num) | |
2501 | return false; | |
2502 | ||
2503 | for (i = 0; i < dev_priv->child_dev_num; i++) { | |
2504 | p_child = dev_priv->child_dev + i; | |
2505 | ||
2506 | if (p_child->dvo_port == PORT_IDPD && | |
2507 | p_child->device_type == DEVICE_TYPE_eDP) | |
2508 | return true; | |
2509 | } | |
2510 | return false; | |
2511 | } | |
2512 | ||
f684960e CW |
2513 | static void |
2514 | intel_dp_add_properties(struct intel_dp *intel_dp, struct drm_connector *connector) | |
2515 | { | |
3f43c48d | 2516 | intel_attach_force_audio_property(connector); |
e953fd7b | 2517 | intel_attach_broadcast_rgb_property(connector); |
f684960e CW |
2518 | } |
2519 | ||
a4fc5ed6 | 2520 | void |
ab9d7c30 | 2521 | intel_dp_init(struct drm_device *dev, int output_reg, enum port port) |
a4fc5ed6 KP |
2522 | { |
2523 | struct drm_i915_private *dev_priv = dev->dev_private; | |
2524 | struct drm_connector *connector; | |
ea5b213a | 2525 | struct intel_dp *intel_dp; |
21d40d37 | 2526 | struct intel_encoder *intel_encoder; |
55f78c43 | 2527 | struct intel_connector *intel_connector; |
f8779fda | 2528 | struct drm_display_mode *fixed_mode = NULL; |
5eb08b69 | 2529 | const char *name = NULL; |
b329530c | 2530 | int type; |
a4fc5ed6 | 2531 | |
ea5b213a CW |
2532 | intel_dp = kzalloc(sizeof(struct intel_dp), GFP_KERNEL); |
2533 | if (!intel_dp) | |
a4fc5ed6 KP |
2534 | return; |
2535 | ||
3d3dc149 | 2536 | intel_dp->output_reg = output_reg; |
ab9d7c30 | 2537 | intel_dp->port = port; |
0767935e DV |
2538 | /* Preserve the current hw state. */ |
2539 | intel_dp->DP = I915_READ(intel_dp->output_reg); | |
3d3dc149 | 2540 | |
55f78c43 ZW |
2541 | intel_connector = kzalloc(sizeof(struct intel_connector), GFP_KERNEL); |
2542 | if (!intel_connector) { | |
ea5b213a | 2543 | kfree(intel_dp); |
55f78c43 ZW |
2544 | return; |
2545 | } | |
ea5b213a | 2546 | intel_encoder = &intel_dp->base; |
dd06f90e | 2547 | intel_dp->attached_connector = intel_connector; |
55f78c43 | 2548 | |
ea5b213a | 2549 | if (HAS_PCH_SPLIT(dev) && output_reg == PCH_DP_D) |
b329530c | 2550 | if (intel_dpd_is_edp(dev)) |
ea5b213a | 2551 | intel_dp->is_pch_edp = true; |
b329530c | 2552 | |
19c03924 GB |
2553 | /* |
2554 | * FIXME : We need to initialize built-in panels before external panels. | |
2555 | * For X0, DP_C is fixed as eDP. Revisit this as part of VLV eDP cleanup | |
2556 | */ | |
2557 | if (IS_VALLEYVIEW(dev) && output_reg == DP_C) { | |
2558 | type = DRM_MODE_CONNECTOR_eDP; | |
2559 | intel_encoder->type = INTEL_OUTPUT_EDP; | |
2560 | } else if (output_reg == DP_A || is_pch_edp(intel_dp)) { | |
b329530c AJ |
2561 | type = DRM_MODE_CONNECTOR_eDP; |
2562 | intel_encoder->type = INTEL_OUTPUT_EDP; | |
2563 | } else { | |
2564 | type = DRM_MODE_CONNECTOR_DisplayPort; | |
2565 | intel_encoder->type = INTEL_OUTPUT_DISPLAYPORT; | |
2566 | } | |
2567 | ||
55f78c43 | 2568 | connector = &intel_connector->base; |
b329530c | 2569 | drm_connector_init(dev, connector, &intel_dp_connector_funcs, type); |
a4fc5ed6 KP |
2570 | drm_connector_helper_add(connector, &intel_dp_connector_helper_funcs); |
2571 | ||
eb1f8e4f DA |
2572 | connector->polled = DRM_CONNECTOR_POLL_HPD; |
2573 | ||
66a9278e | 2574 | intel_encoder->cloneable = false; |
f8aed700 | 2575 | |
66a9278e DV |
2576 | INIT_DELAYED_WORK(&intel_dp->panel_vdd_work, |
2577 | ironlake_panel_vdd_work); | |
6251ec0a | 2578 | |
27f8227b | 2579 | intel_encoder->crtc_mask = (1 << 0) | (1 << 1) | (1 << 2); |
ee7b9f93 | 2580 | |
a4fc5ed6 KP |
2581 | connector->interlace_allowed = true; |
2582 | connector->doublescan_allowed = 0; | |
2583 | ||
4ef69c7a | 2584 | drm_encoder_init(dev, &intel_encoder->base, &intel_dp_enc_funcs, |
a4fc5ed6 | 2585 | DRM_MODE_ENCODER_TMDS); |
a7902ac5 PZ |
2586 | |
2587 | if (IS_HASWELL(dev)) | |
2588 | drm_encoder_helper_add(&intel_encoder->base, | |
2589 | &intel_dp_helper_funcs_hsw); | |
2590 | else | |
2591 | drm_encoder_helper_add(&intel_encoder->base, | |
2592 | &intel_dp_helper_funcs); | |
a4fc5ed6 | 2593 | |
df0e9248 | 2594 | intel_connector_attach_encoder(intel_connector, intel_encoder); |
a4fc5ed6 KP |
2595 | drm_sysfs_connector_add(connector); |
2596 | ||
a7902ac5 PZ |
2597 | if (IS_HASWELL(dev)) { |
2598 | intel_encoder->enable = intel_enable_ddi; | |
2599 | intel_encoder->pre_enable = intel_ddi_pre_enable; | |
2600 | intel_encoder->disable = intel_disable_ddi; | |
2601 | intel_encoder->post_disable = intel_ddi_post_disable; | |
2602 | intel_encoder->get_hw_state = intel_ddi_get_hw_state; | |
2603 | } else { | |
2604 | intel_encoder->enable = intel_enable_dp; | |
2605 | intel_encoder->pre_enable = intel_pre_enable_dp; | |
2606 | intel_encoder->disable = intel_disable_dp; | |
2607 | intel_encoder->post_disable = intel_post_disable_dp; | |
2608 | intel_encoder->get_hw_state = intel_dp_get_hw_state; | |
2609 | } | |
19d8fe15 | 2610 | intel_connector->get_hw_state = intel_connector_get_hw_state; |
e8cb4558 | 2611 | |
a4fc5ed6 | 2612 | /* Set up the DDC bus. */ |
ab9d7c30 PZ |
2613 | switch (port) { |
2614 | case PORT_A: | |
2615 | name = "DPDDC-A"; | |
2616 | break; | |
2617 | case PORT_B: | |
2618 | dev_priv->hotplug_supported_mask |= DPB_HOTPLUG_INT_STATUS; | |
2619 | name = "DPDDC-B"; | |
2620 | break; | |
2621 | case PORT_C: | |
2622 | dev_priv->hotplug_supported_mask |= DPC_HOTPLUG_INT_STATUS; | |
2623 | name = "DPDDC-C"; | |
2624 | break; | |
2625 | case PORT_D: | |
2626 | dev_priv->hotplug_supported_mask |= DPD_HOTPLUG_INT_STATUS; | |
2627 | name = "DPDDC-D"; | |
2628 | break; | |
2629 | default: | |
2630 | WARN(1, "Invalid port %c\n", port_name(port)); | |
2631 | break; | |
5eb08b69 ZW |
2632 | } |
2633 | ||
89667383 JB |
2634 | /* Cache some DPCD data in the eDP case */ |
2635 | if (is_edp(intel_dp)) { | |
82ed61fa DV |
2636 | struct edp_power_seq cur, vbt, spec, final; |
2637 | u32 pp_on, pp_off, pp_div, pp; | |
2638 | ||
2639 | /* Workaround: Need to write PP_CONTROL with the unlock key as | |
2640 | * the very first thing. */ | |
2641 | pp = ironlake_get_pp_control(dev_priv); | |
2642 | I915_WRITE(PCH_PP_CONTROL, pp); | |
5d613501 JB |
2643 | |
2644 | pp_on = I915_READ(PCH_PP_ON_DELAYS); | |
f01eca2e | 2645 | pp_off = I915_READ(PCH_PP_OFF_DELAYS); |
5d613501 | 2646 | pp_div = I915_READ(PCH_PP_DIVISOR); |
89667383 | 2647 | |
f01eca2e KP |
2648 | /* Pull timing values out of registers */ |
2649 | cur.t1_t3 = (pp_on & PANEL_POWER_UP_DELAY_MASK) >> | |
2650 | PANEL_POWER_UP_DELAY_SHIFT; | |
2651 | ||
2652 | cur.t8 = (pp_on & PANEL_LIGHT_ON_DELAY_MASK) >> | |
2653 | PANEL_LIGHT_ON_DELAY_SHIFT; | |
f2e8b18a | 2654 | |
f01eca2e KP |
2655 | cur.t9 = (pp_off & PANEL_LIGHT_OFF_DELAY_MASK) >> |
2656 | PANEL_LIGHT_OFF_DELAY_SHIFT; | |
2657 | ||
2658 | cur.t10 = (pp_off & PANEL_POWER_DOWN_DELAY_MASK) >> | |
2659 | PANEL_POWER_DOWN_DELAY_SHIFT; | |
2660 | ||
2661 | cur.t11_t12 = ((pp_div & PANEL_POWER_CYCLE_DELAY_MASK) >> | |
2662 | PANEL_POWER_CYCLE_DELAY_SHIFT) * 1000; | |
2663 | ||
2664 | DRM_DEBUG_KMS("cur t1_t3 %d t8 %d t9 %d t10 %d t11_t12 %d\n", | |
2665 | cur.t1_t3, cur.t8, cur.t9, cur.t10, cur.t11_t12); | |
2666 | ||
2667 | vbt = dev_priv->edp.pps; | |
2668 | ||
82ed61fa DV |
2669 | /* Upper limits from eDP 1.3 spec. Note that we use the clunky |
2670 | * units of our hw here, which are all in 100usec. */ | |
2671 | spec.t1_t3 = 210 * 10; | |
2672 | spec.t8 = 50 * 10; /* no limit for t8, use t7 instead */ | |
2673 | spec.t9 = 50 * 10; /* no limit for t9, make it symmetric with t8 */ | |
2674 | spec.t10 = 500 * 10; | |
2675 | /* This one is special and actually in units of 100ms, but zero | |
2676 | * based in the hw (so we need to add 100 ms). But the sw vbt | |
2677 | * table multiplies it with 1000 to make it in units of 100usec, | |
2678 | * too. */ | |
2679 | spec.t11_t12 = (510 + 100) * 10; | |
2680 | ||
f01eca2e KP |
2681 | DRM_DEBUG_KMS("vbt t1_t3 %d t8 %d t9 %d t10 %d t11_t12 %d\n", |
2682 | vbt.t1_t3, vbt.t8, vbt.t9, vbt.t10, vbt.t11_t12); | |
2683 | ||
82ed61fa DV |
2684 | /* Use the max of the register settings and vbt. If both are |
2685 | * unset, fall back to the spec limits. */ | |
2686 | #define assign_final(field) final.field = (max(cur.field, vbt.field) == 0 ? \ | |
2687 | spec.field : \ | |
2688 | max(cur.field, vbt.field)) | |
2689 | assign_final(t1_t3); | |
2690 | assign_final(t8); | |
2691 | assign_final(t9); | |
2692 | assign_final(t10); | |
2693 | assign_final(t11_t12); | |
2694 | #undef assign_final | |
2695 | ||
2696 | #define get_delay(field) (DIV_ROUND_UP(final.field, 10)) | |
f01eca2e KP |
2697 | intel_dp->panel_power_up_delay = get_delay(t1_t3); |
2698 | intel_dp->backlight_on_delay = get_delay(t8); | |
2699 | intel_dp->backlight_off_delay = get_delay(t9); | |
2700 | intel_dp->panel_power_down_delay = get_delay(t10); | |
2701 | intel_dp->panel_power_cycle_delay = get_delay(t11_t12); | |
82ed61fa DV |
2702 | #undef get_delay |
2703 | ||
2704 | /* And finally store the new values in the power sequencer. */ | |
2705 | pp_on = (final.t1_t3 << PANEL_POWER_UP_DELAY_SHIFT) | | |
2706 | (final.t8 << PANEL_LIGHT_ON_DELAY_SHIFT); | |
2707 | pp_off = (final.t9 << PANEL_LIGHT_OFF_DELAY_SHIFT) | | |
2708 | (final.t10 << PANEL_POWER_DOWN_DELAY_SHIFT); | |
2709 | pp_div = (pp_div & PP_REFERENCE_DIVIDER_MASK) | | |
2710 | (DIV_ROUND_UP(final.t11_t12, 1000) << PANEL_POWER_CYCLE_DELAY_SHIFT); | |
2711 | ||
2712 | /* Haswell doesn't have any port selection bits for the panel | |
2713 | * power sequence any more. */ | |
2714 | if (HAS_PCH_IBX(dev) || HAS_PCH_CPT(dev)) { | |
2715 | if (is_cpu_edp(intel_dp)) | |
2716 | pp_on |= PANEL_POWER_PORT_DP_A; | |
2717 | else | |
2718 | pp_on |= PANEL_POWER_PORT_DP_D; | |
2719 | } | |
2720 | ||
2721 | I915_WRITE(PCH_PP_ON_DELAYS, pp_on); | |
2722 | I915_WRITE(PCH_PP_OFF_DELAYS, pp_off); | |
2723 | I915_WRITE(PCH_PP_DIVISOR, pp_div); | |
2724 | ||
f01eca2e KP |
2725 | |
2726 | DRM_DEBUG_KMS("panel power up delay %d, power down delay %d, power cycle delay %d\n", | |
2727 | intel_dp->panel_power_up_delay, intel_dp->panel_power_down_delay, | |
2728 | intel_dp->panel_power_cycle_delay); | |
2729 | ||
2730 | DRM_DEBUG_KMS("backlight on delay %d, off delay %d\n", | |
2731 | intel_dp->backlight_on_delay, intel_dp->backlight_off_delay); | |
82ed61fa DV |
2732 | |
2733 | DRM_DEBUG_KMS("panel power sequencer register settings: PP_ON %#x, PP_OFF %#x, PP_DIV %#x\n", | |
2734 | I915_READ(PCH_PP_ON_DELAYS), | |
2735 | I915_READ(PCH_PP_OFF_DELAYS), | |
2736 | I915_READ(PCH_PP_DIVISOR)); | |
c1f05264 DA |
2737 | } |
2738 | ||
2739 | intel_dp_i2c_init(intel_dp, intel_connector, name); | |
2740 | ||
2741 | if (is_edp(intel_dp)) { | |
2742 | bool ret; | |
f8779fda | 2743 | struct drm_display_mode *scan; |
c1f05264 | 2744 | struct edid *edid; |
5d613501 JB |
2745 | |
2746 | ironlake_edp_panel_vdd_on(intel_dp); | |
59f3e272 | 2747 | ret = intel_dp_get_dpcd(intel_dp); |
bd943159 | 2748 | ironlake_edp_panel_vdd_off(intel_dp, false); |
99ea7127 | 2749 | |
59f3e272 | 2750 | if (ret) { |
7183dc29 JB |
2751 | if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11) |
2752 | dev_priv->no_aux_handshake = | |
2753 | intel_dp->dpcd[DP_MAX_DOWNSPREAD] & | |
89667383 JB |
2754 | DP_NO_AUX_HANDSHAKE_LINK_TRAINING; |
2755 | } else { | |
3d3dc149 | 2756 | /* if this fails, presume the device is a ghost */ |
48898b03 | 2757 | DRM_INFO("failed to retrieve link info, disabling eDP\n"); |
3d3dc149 | 2758 | intel_dp_encoder_destroy(&intel_dp->base.base); |
48898b03 | 2759 | intel_dp_destroy(&intel_connector->base); |
3d3dc149 | 2760 | return; |
89667383 | 2761 | } |
89667383 | 2762 | |
d6f24d0f JB |
2763 | ironlake_edp_panel_vdd_on(intel_dp); |
2764 | edid = drm_get_edid(connector, &intel_dp->adapter); | |
2765 | if (edid) { | |
9cd300e0 JN |
2766 | if (drm_add_edid_modes(connector, edid)) { |
2767 | drm_mode_connector_update_edid_property(connector, edid); | |
2768 | drm_edid_to_eld(connector, edid); | |
2769 | } else { | |
2770 | kfree(edid); | |
2771 | edid = ERR_PTR(-EINVAL); | |
2772 | } | |
2773 | } else { | |
2774 | edid = ERR_PTR(-ENOENT); | |
d6f24d0f | 2775 | } |
9cd300e0 | 2776 | intel_connector->edid = edid; |
f8779fda JN |
2777 | |
2778 | /* prefer fixed mode from EDID if available */ | |
2779 | list_for_each_entry(scan, &connector->probed_modes, head) { | |
2780 | if ((scan->type & DRM_MODE_TYPE_PREFERRED)) { | |
2781 | fixed_mode = drm_mode_duplicate(dev, scan); | |
2782 | break; | |
2783 | } | |
2784 | } | |
2785 | ||
2786 | /* fallback to VBT if available for eDP */ | |
2787 | if (!fixed_mode && dev_priv->lfp_lvds_vbt_mode) { | |
2788 | fixed_mode = drm_mode_duplicate(dev, dev_priv->lfp_lvds_vbt_mode); | |
2789 | if (fixed_mode) | |
2790 | fixed_mode->type |= DRM_MODE_TYPE_PREFERRED; | |
2791 | } | |
f8779fda | 2792 | |
d6f24d0f JB |
2793 | ironlake_edp_panel_vdd_off(intel_dp, false); |
2794 | } | |
552fb0b7 | 2795 | |
21d40d37 | 2796 | intel_encoder->hot_plug = intel_dp_hot_plug; |
a4fc5ed6 | 2797 | |
1d508706 | 2798 | if (is_edp(intel_dp)) { |
dd06f90e | 2799 | intel_panel_init(&intel_connector->panel, fixed_mode); |
0657b6b1 | 2800 | intel_panel_setup_backlight(connector); |
1d508706 | 2801 | } |
32f9d658 | 2802 | |
f684960e CW |
2803 | intel_dp_add_properties(intel_dp, connector); |
2804 | ||
a4fc5ed6 KP |
2805 | /* For G4X desktop chip, PEG_BAND_GAP_DATA 3:0 must first be written |
2806 | * 0xd. Failure to do so will result in spurious interrupts being | |
2807 | * generated on the port when a cable is not attached. | |
2808 | */ | |
2809 | if (IS_G4X(dev) && !IS_GM45(dev)) { | |
2810 | u32 temp = I915_READ(PEG_BAND_GAP_DATA); | |
2811 | I915_WRITE(PEG_BAND_GAP_DATA, (temp & ~0xf) | 0xd); | |
2812 | } | |
2813 | } |