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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)) | |
6b3ec1c9 | 380 | aux_clock_divider = DIV_ROUND_UP(intel_pch_rawclk(dev), 2); |
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; |
afe2fcf5 | 780 | enum transcoder cpu_transcoder = intel_crtc->cpu_transcoder; |
a4fc5ed6 KP |
781 | |
782 | /* | |
21d40d37 | 783 | * Find the lane count in the intel_encoder private |
a4fc5ed6 | 784 | */ |
6c2b7c12 DV |
785 | for_each_encoder_on_crtc(dev, crtc, encoder) { |
786 | struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base); | |
a4fc5ed6 | 787 | |
9a10f401 KP |
788 | if (intel_dp->base.type == INTEL_OUTPUT_DISPLAYPORT || |
789 | intel_dp->base.type == INTEL_OUTPUT_EDP) | |
790 | { | |
ea5b213a | 791 | lane_count = intel_dp->lane_count; |
51190667 | 792 | break; |
a4fc5ed6 KP |
793 | } |
794 | } | |
795 | ||
796 | /* | |
797 | * Compute the GMCH and Link ratios. The '3' here is | |
798 | * the number of bytes_per_pixel post-LUT, which we always | |
799 | * set up for 8-bits of R/G/B, or 3 bytes total. | |
800 | */ | |
858fa035 | 801 | intel_dp_compute_m_n(intel_crtc->bpp, lane_count, |
a4fc5ed6 KP |
802 | mode->clock, adjusted_mode->clock, &m_n); |
803 | ||
1eb8dfec | 804 | if (IS_HASWELL(dev)) { |
afe2fcf5 PZ |
805 | I915_WRITE(PIPE_DATA_M1(cpu_transcoder), |
806 | TU_SIZE(m_n.tu) | m_n.gmch_m); | |
807 | I915_WRITE(PIPE_DATA_N1(cpu_transcoder), m_n.gmch_n); | |
808 | I915_WRITE(PIPE_LINK_M1(cpu_transcoder), m_n.link_m); | |
809 | I915_WRITE(PIPE_LINK_N1(cpu_transcoder), m_n.link_n); | |
1eb8dfec | 810 | } else if (HAS_PCH_SPLIT(dev)) { |
7346bfa0 | 811 | I915_WRITE(TRANSDATA_M1(pipe), TU_SIZE(m_n.tu) | m_n.gmch_m); |
9db4a9c7 JB |
812 | I915_WRITE(TRANSDATA_N1(pipe), m_n.gmch_n); |
813 | I915_WRITE(TRANSDPLINK_M1(pipe), m_n.link_m); | |
814 | I915_WRITE(TRANSDPLINK_N1(pipe), m_n.link_n); | |
74a4dd2e VP |
815 | } else if (IS_VALLEYVIEW(dev)) { |
816 | I915_WRITE(PIPE_DATA_M1(pipe), TU_SIZE(m_n.tu) | m_n.gmch_m); | |
817 | I915_WRITE(PIPE_DATA_N1(pipe), m_n.gmch_n); | |
818 | I915_WRITE(PIPE_LINK_M1(pipe), m_n.link_m); | |
819 | I915_WRITE(PIPE_LINK_N1(pipe), m_n.link_n); | |
a4fc5ed6 | 820 | } else { |
9db4a9c7 | 821 | I915_WRITE(PIPE_GMCH_DATA_M(pipe), |
7346bfa0 | 822 | TU_SIZE(m_n.tu) | m_n.gmch_m); |
9db4a9c7 JB |
823 | I915_WRITE(PIPE_GMCH_DATA_N(pipe), m_n.gmch_n); |
824 | I915_WRITE(PIPE_DP_LINK_M(pipe), m_n.link_m); | |
825 | I915_WRITE(PIPE_DP_LINK_N(pipe), m_n.link_n); | |
a4fc5ed6 KP |
826 | } |
827 | } | |
828 | ||
247d89f6 PZ |
829 | void intel_dp_init_link_config(struct intel_dp *intel_dp) |
830 | { | |
831 | memset(intel_dp->link_configuration, 0, DP_LINK_CONFIGURATION_SIZE); | |
832 | intel_dp->link_configuration[0] = intel_dp->link_bw; | |
833 | intel_dp->link_configuration[1] = intel_dp->lane_count; | |
834 | intel_dp->link_configuration[8] = DP_SET_ANSI_8B10B; | |
835 | /* | |
836 | * Check for DPCD version > 1.1 and enhanced framing support | |
837 | */ | |
838 | if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11 && | |
839 | (intel_dp->dpcd[DP_MAX_LANE_COUNT] & DP_ENHANCED_FRAME_CAP)) { | |
840 | intel_dp->link_configuration[1] |= DP_LANE_COUNT_ENHANCED_FRAME_EN; | |
841 | } | |
842 | } | |
843 | ||
a4fc5ed6 KP |
844 | static void |
845 | intel_dp_mode_set(struct drm_encoder *encoder, struct drm_display_mode *mode, | |
846 | struct drm_display_mode *adjusted_mode) | |
847 | { | |
e3421a18 | 848 | struct drm_device *dev = encoder->dev; |
417e822d | 849 | struct drm_i915_private *dev_priv = dev->dev_private; |
ea5b213a | 850 | struct intel_dp *intel_dp = enc_to_intel_dp(encoder); |
4ef69c7a | 851 | struct drm_crtc *crtc = intel_dp->base.base.crtc; |
a4fc5ed6 KP |
852 | struct intel_crtc *intel_crtc = to_intel_crtc(crtc); |
853 | ||
417e822d | 854 | /* |
1a2eb460 | 855 | * There are four kinds of DP registers: |
417e822d KP |
856 | * |
857 | * IBX PCH | |
1a2eb460 KP |
858 | * SNB CPU |
859 | * IVB CPU | |
417e822d KP |
860 | * CPT PCH |
861 | * | |
862 | * IBX PCH and CPU are the same for almost everything, | |
863 | * except that the CPU DP PLL is configured in this | |
864 | * register | |
865 | * | |
866 | * CPT PCH is quite different, having many bits moved | |
867 | * to the TRANS_DP_CTL register instead. That | |
868 | * configuration happens (oddly) in ironlake_pch_enable | |
869 | */ | |
9c9e7927 | 870 | |
417e822d KP |
871 | /* Preserve the BIOS-computed detected bit. This is |
872 | * supposed to be read-only. | |
873 | */ | |
874 | intel_dp->DP = I915_READ(intel_dp->output_reg) & DP_DETECTED; | |
a4fc5ed6 | 875 | |
417e822d | 876 | /* Handle DP bits in common between all three register formats */ |
417e822d | 877 | intel_dp->DP |= DP_VOLTAGE_0_4 | DP_PRE_EMPHASIS_0; |
a4fc5ed6 | 878 | |
ea5b213a | 879 | switch (intel_dp->lane_count) { |
a4fc5ed6 | 880 | case 1: |
ea5b213a | 881 | intel_dp->DP |= DP_PORT_WIDTH_1; |
a4fc5ed6 KP |
882 | break; |
883 | case 2: | |
ea5b213a | 884 | intel_dp->DP |= DP_PORT_WIDTH_2; |
a4fc5ed6 KP |
885 | break; |
886 | case 4: | |
ea5b213a | 887 | intel_dp->DP |= DP_PORT_WIDTH_4; |
a4fc5ed6 KP |
888 | break; |
889 | } | |
e0dac65e WF |
890 | if (intel_dp->has_audio) { |
891 | DRM_DEBUG_DRIVER("Enabling DP audio on pipe %c\n", | |
892 | pipe_name(intel_crtc->pipe)); | |
ea5b213a | 893 | intel_dp->DP |= DP_AUDIO_OUTPUT_ENABLE; |
e0dac65e WF |
894 | intel_write_eld(encoder, adjusted_mode); |
895 | } | |
247d89f6 PZ |
896 | |
897 | intel_dp_init_link_config(intel_dp); | |
a4fc5ed6 | 898 | |
417e822d | 899 | /* Split out the IBX/CPU vs CPT settings */ |
32f9d658 | 900 | |
19c03924 | 901 | if (is_cpu_edp(intel_dp) && IS_GEN7(dev) && !IS_VALLEYVIEW(dev)) { |
1a2eb460 KP |
902 | if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC) |
903 | intel_dp->DP |= DP_SYNC_HS_HIGH; | |
904 | if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC) | |
905 | intel_dp->DP |= DP_SYNC_VS_HIGH; | |
906 | intel_dp->DP |= DP_LINK_TRAIN_OFF_CPT; | |
907 | ||
908 | if (intel_dp->link_configuration[1] & DP_LANE_COUNT_ENHANCED_FRAME_EN) | |
909 | intel_dp->DP |= DP_ENHANCED_FRAMING; | |
910 | ||
911 | intel_dp->DP |= intel_crtc->pipe << 29; | |
912 | ||
913 | /* don't miss out required setting for eDP */ | |
1a2eb460 KP |
914 | if (adjusted_mode->clock < 200000) |
915 | intel_dp->DP |= DP_PLL_FREQ_160MHZ; | |
916 | else | |
917 | intel_dp->DP |= DP_PLL_FREQ_270MHZ; | |
918 | } else if (!HAS_PCH_CPT(dev) || is_cpu_edp(intel_dp)) { | |
417e822d KP |
919 | intel_dp->DP |= intel_dp->color_range; |
920 | ||
921 | if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC) | |
922 | intel_dp->DP |= DP_SYNC_HS_HIGH; | |
923 | if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC) | |
924 | intel_dp->DP |= DP_SYNC_VS_HIGH; | |
925 | intel_dp->DP |= DP_LINK_TRAIN_OFF; | |
926 | ||
927 | if (intel_dp->link_configuration[1] & DP_LANE_COUNT_ENHANCED_FRAME_EN) | |
928 | intel_dp->DP |= DP_ENHANCED_FRAMING; | |
929 | ||
930 | if (intel_crtc->pipe == 1) | |
931 | intel_dp->DP |= DP_PIPEB_SELECT; | |
932 | ||
933 | if (is_cpu_edp(intel_dp)) { | |
934 | /* don't miss out required setting for eDP */ | |
417e822d KP |
935 | if (adjusted_mode->clock < 200000) |
936 | intel_dp->DP |= DP_PLL_FREQ_160MHZ; | |
937 | else | |
938 | intel_dp->DP |= DP_PLL_FREQ_270MHZ; | |
939 | } | |
940 | } else { | |
941 | intel_dp->DP |= DP_LINK_TRAIN_OFF_CPT; | |
32f9d658 | 942 | } |
a4fc5ed6 KP |
943 | } |
944 | ||
99ea7127 KP |
945 | #define IDLE_ON_MASK (PP_ON | 0 | PP_SEQUENCE_MASK | 0 | PP_SEQUENCE_STATE_MASK) |
946 | #define IDLE_ON_VALUE (PP_ON | 0 | PP_SEQUENCE_NONE | 0 | PP_SEQUENCE_STATE_ON_IDLE) | |
947 | ||
948 | #define IDLE_OFF_MASK (PP_ON | 0 | PP_SEQUENCE_MASK | 0 | PP_SEQUENCE_STATE_MASK) | |
949 | #define IDLE_OFF_VALUE (0 | 0 | PP_SEQUENCE_NONE | 0 | PP_SEQUENCE_STATE_OFF_IDLE) | |
950 | ||
951 | #define IDLE_CYCLE_MASK (PP_ON | 0 | PP_SEQUENCE_MASK | PP_CYCLE_DELAY_ACTIVE | PP_SEQUENCE_STATE_MASK) | |
952 | #define IDLE_CYCLE_VALUE (0 | 0 | PP_SEQUENCE_NONE | 0 | PP_SEQUENCE_STATE_OFF_IDLE) | |
953 | ||
954 | static void ironlake_wait_panel_status(struct intel_dp *intel_dp, | |
955 | u32 mask, | |
956 | u32 value) | |
bd943159 | 957 | { |
99ea7127 KP |
958 | struct drm_device *dev = intel_dp->base.base.dev; |
959 | struct drm_i915_private *dev_priv = dev->dev_private; | |
32ce697c | 960 | |
99ea7127 KP |
961 | DRM_DEBUG_KMS("mask %08x value %08x status %08x control %08x\n", |
962 | mask, value, | |
963 | I915_READ(PCH_PP_STATUS), | |
964 | I915_READ(PCH_PP_CONTROL)); | |
32ce697c | 965 | |
99ea7127 KP |
966 | if (_wait_for((I915_READ(PCH_PP_STATUS) & mask) == value, 5000, 10)) { |
967 | DRM_ERROR("Panel status timeout: status %08x control %08x\n", | |
968 | I915_READ(PCH_PP_STATUS), | |
969 | I915_READ(PCH_PP_CONTROL)); | |
32ce697c | 970 | } |
99ea7127 | 971 | } |
32ce697c | 972 | |
99ea7127 KP |
973 | static void ironlake_wait_panel_on(struct intel_dp *intel_dp) |
974 | { | |
975 | DRM_DEBUG_KMS("Wait for panel power on\n"); | |
976 | ironlake_wait_panel_status(intel_dp, IDLE_ON_MASK, IDLE_ON_VALUE); | |
bd943159 KP |
977 | } |
978 | ||
99ea7127 KP |
979 | static void ironlake_wait_panel_off(struct intel_dp *intel_dp) |
980 | { | |
981 | DRM_DEBUG_KMS("Wait for panel power off time\n"); | |
982 | ironlake_wait_panel_status(intel_dp, IDLE_OFF_MASK, IDLE_OFF_VALUE); | |
983 | } | |
984 | ||
985 | static void ironlake_wait_panel_power_cycle(struct intel_dp *intel_dp) | |
986 | { | |
987 | DRM_DEBUG_KMS("Wait for panel power cycle\n"); | |
988 | ironlake_wait_panel_status(intel_dp, IDLE_CYCLE_MASK, IDLE_CYCLE_VALUE); | |
989 | } | |
990 | ||
991 | ||
832dd3c1 KP |
992 | /* Read the current pp_control value, unlocking the register if it |
993 | * is locked | |
994 | */ | |
995 | ||
996 | static u32 ironlake_get_pp_control(struct drm_i915_private *dev_priv) | |
997 | { | |
998 | u32 control = I915_READ(PCH_PP_CONTROL); | |
999 | ||
1000 | control &= ~PANEL_UNLOCK_MASK; | |
1001 | control |= PANEL_UNLOCK_REGS; | |
1002 | return control; | |
bd943159 KP |
1003 | } |
1004 | ||
5d613501 JB |
1005 | static void ironlake_edp_panel_vdd_on(struct intel_dp *intel_dp) |
1006 | { | |
1007 | struct drm_device *dev = intel_dp->base.base.dev; | |
1008 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1009 | u32 pp; | |
1010 | ||
97af61f5 KP |
1011 | if (!is_edp(intel_dp)) |
1012 | return; | |
f01eca2e | 1013 | DRM_DEBUG_KMS("Turn eDP VDD on\n"); |
5d613501 | 1014 | |
bd943159 KP |
1015 | WARN(intel_dp->want_panel_vdd, |
1016 | "eDP VDD already requested on\n"); | |
1017 | ||
1018 | intel_dp->want_panel_vdd = true; | |
99ea7127 | 1019 | |
bd943159 KP |
1020 | if (ironlake_edp_have_panel_vdd(intel_dp)) { |
1021 | DRM_DEBUG_KMS("eDP VDD already on\n"); | |
1022 | return; | |
1023 | } | |
1024 | ||
99ea7127 KP |
1025 | if (!ironlake_edp_have_panel_power(intel_dp)) |
1026 | ironlake_wait_panel_power_cycle(intel_dp); | |
1027 | ||
832dd3c1 | 1028 | pp = ironlake_get_pp_control(dev_priv); |
5d613501 JB |
1029 | pp |= EDP_FORCE_VDD; |
1030 | I915_WRITE(PCH_PP_CONTROL, pp); | |
1031 | POSTING_READ(PCH_PP_CONTROL); | |
f01eca2e KP |
1032 | DRM_DEBUG_KMS("PCH_PP_STATUS: 0x%08x PCH_PP_CONTROL: 0x%08x\n", |
1033 | I915_READ(PCH_PP_STATUS), I915_READ(PCH_PP_CONTROL)); | |
ebf33b18 KP |
1034 | |
1035 | /* | |
1036 | * If the panel wasn't on, delay before accessing aux channel | |
1037 | */ | |
1038 | if (!ironlake_edp_have_panel_power(intel_dp)) { | |
bd943159 | 1039 | DRM_DEBUG_KMS("eDP was not running\n"); |
f01eca2e | 1040 | msleep(intel_dp->panel_power_up_delay); |
f01eca2e | 1041 | } |
5d613501 JB |
1042 | } |
1043 | ||
bd943159 | 1044 | static void ironlake_panel_vdd_off_sync(struct intel_dp *intel_dp) |
5d613501 JB |
1045 | { |
1046 | struct drm_device *dev = intel_dp->base.base.dev; | |
1047 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1048 | u32 pp; | |
1049 | ||
bd943159 | 1050 | if (!intel_dp->want_panel_vdd && ironlake_edp_have_panel_vdd(intel_dp)) { |
832dd3c1 | 1051 | pp = ironlake_get_pp_control(dev_priv); |
bd943159 KP |
1052 | pp &= ~EDP_FORCE_VDD; |
1053 | I915_WRITE(PCH_PP_CONTROL, pp); | |
1054 | POSTING_READ(PCH_PP_CONTROL); | |
1055 | ||
1056 | /* Make sure sequencer is idle before allowing subsequent activity */ | |
1057 | DRM_DEBUG_KMS("PCH_PP_STATUS: 0x%08x PCH_PP_CONTROL: 0x%08x\n", | |
1058 | I915_READ(PCH_PP_STATUS), I915_READ(PCH_PP_CONTROL)); | |
99ea7127 KP |
1059 | |
1060 | msleep(intel_dp->panel_power_down_delay); | |
bd943159 KP |
1061 | } |
1062 | } | |
5d613501 | 1063 | |
bd943159 KP |
1064 | static void ironlake_panel_vdd_work(struct work_struct *__work) |
1065 | { | |
1066 | struct intel_dp *intel_dp = container_of(to_delayed_work(__work), | |
1067 | struct intel_dp, panel_vdd_work); | |
1068 | struct drm_device *dev = intel_dp->base.base.dev; | |
1069 | ||
627f7675 | 1070 | mutex_lock(&dev->mode_config.mutex); |
bd943159 | 1071 | ironlake_panel_vdd_off_sync(intel_dp); |
627f7675 | 1072 | mutex_unlock(&dev->mode_config.mutex); |
bd943159 KP |
1073 | } |
1074 | ||
1075 | static void ironlake_edp_panel_vdd_off(struct intel_dp *intel_dp, bool sync) | |
1076 | { | |
97af61f5 KP |
1077 | if (!is_edp(intel_dp)) |
1078 | return; | |
5d613501 | 1079 | |
bd943159 KP |
1080 | DRM_DEBUG_KMS("Turn eDP VDD off %d\n", intel_dp->want_panel_vdd); |
1081 | WARN(!intel_dp->want_panel_vdd, "eDP VDD not forced on"); | |
f2e8b18a | 1082 | |
bd943159 KP |
1083 | intel_dp->want_panel_vdd = false; |
1084 | ||
1085 | if (sync) { | |
1086 | ironlake_panel_vdd_off_sync(intel_dp); | |
1087 | } else { | |
1088 | /* | |
1089 | * Queue the timer to fire a long | |
1090 | * time from now (relative to the power down delay) | |
1091 | * to keep the panel power up across a sequence of operations | |
1092 | */ | |
1093 | schedule_delayed_work(&intel_dp->panel_vdd_work, | |
1094 | msecs_to_jiffies(intel_dp->panel_power_cycle_delay * 5)); | |
1095 | } | |
5d613501 JB |
1096 | } |
1097 | ||
86a3073e | 1098 | static void ironlake_edp_panel_on(struct intel_dp *intel_dp) |
9934c132 | 1099 | { |
01cb9ea6 | 1100 | struct drm_device *dev = intel_dp->base.base.dev; |
9934c132 | 1101 | struct drm_i915_private *dev_priv = dev->dev_private; |
99ea7127 | 1102 | u32 pp; |
9934c132 | 1103 | |
97af61f5 | 1104 | if (!is_edp(intel_dp)) |
bd943159 | 1105 | return; |
99ea7127 KP |
1106 | |
1107 | DRM_DEBUG_KMS("Turn eDP power on\n"); | |
1108 | ||
1109 | if (ironlake_edp_have_panel_power(intel_dp)) { | |
1110 | DRM_DEBUG_KMS("eDP power already on\n"); | |
7d639f35 | 1111 | return; |
99ea7127 | 1112 | } |
9934c132 | 1113 | |
99ea7127 | 1114 | ironlake_wait_panel_power_cycle(intel_dp); |
37c6c9b0 | 1115 | |
99ea7127 | 1116 | pp = ironlake_get_pp_control(dev_priv); |
05ce1a49 KP |
1117 | if (IS_GEN5(dev)) { |
1118 | /* ILK workaround: disable reset around power sequence */ | |
1119 | pp &= ~PANEL_POWER_RESET; | |
1120 | I915_WRITE(PCH_PP_CONTROL, pp); | |
1121 | POSTING_READ(PCH_PP_CONTROL); | |
1122 | } | |
37c6c9b0 | 1123 | |
1c0ae80a | 1124 | pp |= POWER_TARGET_ON; |
99ea7127 KP |
1125 | if (!IS_GEN5(dev)) |
1126 | pp |= PANEL_POWER_RESET; | |
1127 | ||
9934c132 | 1128 | I915_WRITE(PCH_PP_CONTROL, pp); |
01cb9ea6 | 1129 | POSTING_READ(PCH_PP_CONTROL); |
9934c132 | 1130 | |
99ea7127 | 1131 | ironlake_wait_panel_on(intel_dp); |
9934c132 | 1132 | |
05ce1a49 KP |
1133 | if (IS_GEN5(dev)) { |
1134 | pp |= PANEL_POWER_RESET; /* restore panel reset bit */ | |
1135 | I915_WRITE(PCH_PP_CONTROL, pp); | |
1136 | POSTING_READ(PCH_PP_CONTROL); | |
1137 | } | |
9934c132 JB |
1138 | } |
1139 | ||
99ea7127 | 1140 | static void ironlake_edp_panel_off(struct intel_dp *intel_dp) |
9934c132 | 1141 | { |
99ea7127 | 1142 | struct drm_device *dev = intel_dp->base.base.dev; |
9934c132 | 1143 | struct drm_i915_private *dev_priv = dev->dev_private; |
99ea7127 | 1144 | u32 pp; |
9934c132 | 1145 | |
97af61f5 KP |
1146 | if (!is_edp(intel_dp)) |
1147 | return; | |
37c6c9b0 | 1148 | |
99ea7127 | 1149 | DRM_DEBUG_KMS("Turn eDP power off\n"); |
37c6c9b0 | 1150 | |
6cb49835 | 1151 | WARN(!intel_dp->want_panel_vdd, "Need VDD to turn off panel\n"); |
37c6c9b0 | 1152 | |
99ea7127 | 1153 | pp = ironlake_get_pp_control(dev_priv); |
35a38556 DV |
1154 | /* We need to switch off panel power _and_ force vdd, for otherwise some |
1155 | * panels get very unhappy and cease to work. */ | |
1156 | pp &= ~(POWER_TARGET_ON | EDP_FORCE_VDD | PANEL_POWER_RESET | EDP_BLC_ENABLE); | |
99ea7127 KP |
1157 | I915_WRITE(PCH_PP_CONTROL, pp); |
1158 | POSTING_READ(PCH_PP_CONTROL); | |
9934c132 | 1159 | |
35a38556 DV |
1160 | intel_dp->want_panel_vdd = false; |
1161 | ||
99ea7127 | 1162 | ironlake_wait_panel_off(intel_dp); |
9934c132 JB |
1163 | } |
1164 | ||
86a3073e | 1165 | static void ironlake_edp_backlight_on(struct intel_dp *intel_dp) |
32f9d658 | 1166 | { |
f01eca2e | 1167 | struct drm_device *dev = intel_dp->base.base.dev; |
32f9d658 | 1168 | struct drm_i915_private *dev_priv = dev->dev_private; |
035aa3de | 1169 | int pipe = to_intel_crtc(intel_dp->base.base.crtc)->pipe; |
32f9d658 ZW |
1170 | u32 pp; |
1171 | ||
f01eca2e KP |
1172 | if (!is_edp(intel_dp)) |
1173 | return; | |
1174 | ||
28c97730 | 1175 | DRM_DEBUG_KMS("\n"); |
01cb9ea6 JB |
1176 | /* |
1177 | * If we enable the backlight right away following a panel power | |
1178 | * on, we may see slight flicker as the panel syncs with the eDP | |
1179 | * link. So delay a bit to make sure the image is solid before | |
1180 | * allowing it to appear. | |
1181 | */ | |
f01eca2e | 1182 | msleep(intel_dp->backlight_on_delay); |
832dd3c1 | 1183 | pp = ironlake_get_pp_control(dev_priv); |
32f9d658 ZW |
1184 | pp |= EDP_BLC_ENABLE; |
1185 | I915_WRITE(PCH_PP_CONTROL, pp); | |
f01eca2e | 1186 | POSTING_READ(PCH_PP_CONTROL); |
035aa3de DV |
1187 | |
1188 | intel_panel_enable_backlight(dev, pipe); | |
32f9d658 ZW |
1189 | } |
1190 | ||
86a3073e | 1191 | static void ironlake_edp_backlight_off(struct intel_dp *intel_dp) |
32f9d658 | 1192 | { |
f01eca2e | 1193 | struct drm_device *dev = intel_dp->base.base.dev; |
32f9d658 ZW |
1194 | struct drm_i915_private *dev_priv = dev->dev_private; |
1195 | u32 pp; | |
1196 | ||
f01eca2e KP |
1197 | if (!is_edp(intel_dp)) |
1198 | return; | |
1199 | ||
035aa3de DV |
1200 | intel_panel_disable_backlight(dev); |
1201 | ||
28c97730 | 1202 | DRM_DEBUG_KMS("\n"); |
832dd3c1 | 1203 | pp = ironlake_get_pp_control(dev_priv); |
32f9d658 ZW |
1204 | pp &= ~EDP_BLC_ENABLE; |
1205 | I915_WRITE(PCH_PP_CONTROL, pp); | |
f01eca2e KP |
1206 | POSTING_READ(PCH_PP_CONTROL); |
1207 | msleep(intel_dp->backlight_off_delay); | |
32f9d658 | 1208 | } |
a4fc5ed6 | 1209 | |
2bd2ad64 | 1210 | static void ironlake_edp_pll_on(struct intel_dp *intel_dp) |
d240f20f | 1211 | { |
2bd2ad64 DV |
1212 | struct drm_device *dev = intel_dp->base.base.dev; |
1213 | struct drm_crtc *crtc = intel_dp->base.base.crtc; | |
d240f20f JB |
1214 | struct drm_i915_private *dev_priv = dev->dev_private; |
1215 | u32 dpa_ctl; | |
1216 | ||
2bd2ad64 DV |
1217 | assert_pipe_disabled(dev_priv, |
1218 | to_intel_crtc(crtc)->pipe); | |
1219 | ||
d240f20f JB |
1220 | DRM_DEBUG_KMS("\n"); |
1221 | dpa_ctl = I915_READ(DP_A); | |
0767935e DV |
1222 | WARN(dpa_ctl & DP_PLL_ENABLE, "dp pll on, should be off\n"); |
1223 | WARN(dpa_ctl & DP_PORT_EN, "dp port still on, should be off\n"); | |
1224 | ||
1225 | /* We don't adjust intel_dp->DP while tearing down the link, to | |
1226 | * facilitate link retraining (e.g. after hotplug). Hence clear all | |
1227 | * enable bits here to ensure that we don't enable too much. */ | |
1228 | intel_dp->DP &= ~(DP_PORT_EN | DP_AUDIO_OUTPUT_ENABLE); | |
1229 | intel_dp->DP |= DP_PLL_ENABLE; | |
1230 | I915_WRITE(DP_A, intel_dp->DP); | |
298b0b39 JB |
1231 | POSTING_READ(DP_A); |
1232 | udelay(200); | |
d240f20f JB |
1233 | } |
1234 | ||
2bd2ad64 | 1235 | static void ironlake_edp_pll_off(struct intel_dp *intel_dp) |
d240f20f | 1236 | { |
2bd2ad64 DV |
1237 | struct drm_device *dev = intel_dp->base.base.dev; |
1238 | struct drm_crtc *crtc = intel_dp->base.base.crtc; | |
d240f20f JB |
1239 | struct drm_i915_private *dev_priv = dev->dev_private; |
1240 | u32 dpa_ctl; | |
1241 | ||
2bd2ad64 DV |
1242 | assert_pipe_disabled(dev_priv, |
1243 | to_intel_crtc(crtc)->pipe); | |
1244 | ||
d240f20f | 1245 | dpa_ctl = I915_READ(DP_A); |
0767935e DV |
1246 | WARN((dpa_ctl & DP_PLL_ENABLE) == 0, |
1247 | "dp pll off, should be on\n"); | |
1248 | WARN(dpa_ctl & DP_PORT_EN, "dp port still on, should be off\n"); | |
1249 | ||
1250 | /* We can't rely on the value tracked for the DP register in | |
1251 | * intel_dp->DP because link_down must not change that (otherwise link | |
1252 | * re-training will fail. */ | |
298b0b39 | 1253 | dpa_ctl &= ~DP_PLL_ENABLE; |
d240f20f | 1254 | I915_WRITE(DP_A, dpa_ctl); |
1af5fa1b | 1255 | POSTING_READ(DP_A); |
d240f20f JB |
1256 | udelay(200); |
1257 | } | |
1258 | ||
c7ad3810 | 1259 | /* If the sink supports it, try to set the power state appropriately */ |
c19b0669 | 1260 | void intel_dp_sink_dpms(struct intel_dp *intel_dp, int mode) |
c7ad3810 JB |
1261 | { |
1262 | int ret, i; | |
1263 | ||
1264 | /* Should have a valid DPCD by this point */ | |
1265 | if (intel_dp->dpcd[DP_DPCD_REV] < 0x11) | |
1266 | return; | |
1267 | ||
1268 | if (mode != DRM_MODE_DPMS_ON) { | |
1269 | ret = intel_dp_aux_native_write_1(intel_dp, DP_SET_POWER, | |
1270 | DP_SET_POWER_D3); | |
1271 | if (ret != 1) | |
1272 | DRM_DEBUG_DRIVER("failed to write sink power state\n"); | |
1273 | } else { | |
1274 | /* | |
1275 | * When turning on, we need to retry for 1ms to give the sink | |
1276 | * time to wake up. | |
1277 | */ | |
1278 | for (i = 0; i < 3; i++) { | |
1279 | ret = intel_dp_aux_native_write_1(intel_dp, | |
1280 | DP_SET_POWER, | |
1281 | DP_SET_POWER_D0); | |
1282 | if (ret == 1) | |
1283 | break; | |
1284 | msleep(1); | |
1285 | } | |
1286 | } | |
1287 | } | |
1288 | ||
19d8fe15 DV |
1289 | static bool intel_dp_get_hw_state(struct intel_encoder *encoder, |
1290 | enum pipe *pipe) | |
d240f20f | 1291 | { |
19d8fe15 DV |
1292 | struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base); |
1293 | struct drm_device *dev = encoder->base.dev; | |
1294 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1295 | u32 tmp = I915_READ(intel_dp->output_reg); | |
1296 | ||
1297 | if (!(tmp & DP_PORT_EN)) | |
1298 | return false; | |
1299 | ||
1300 | if (is_cpu_edp(intel_dp) && IS_GEN7(dev)) { | |
1301 | *pipe = PORT_TO_PIPE_CPT(tmp); | |
1302 | } else if (!HAS_PCH_CPT(dev) || is_cpu_edp(intel_dp)) { | |
1303 | *pipe = PORT_TO_PIPE(tmp); | |
1304 | } else { | |
1305 | u32 trans_sel; | |
1306 | u32 trans_dp; | |
1307 | int i; | |
1308 | ||
1309 | switch (intel_dp->output_reg) { | |
1310 | case PCH_DP_B: | |
1311 | trans_sel = TRANS_DP_PORT_SEL_B; | |
1312 | break; | |
1313 | case PCH_DP_C: | |
1314 | trans_sel = TRANS_DP_PORT_SEL_C; | |
1315 | break; | |
1316 | case PCH_DP_D: | |
1317 | trans_sel = TRANS_DP_PORT_SEL_D; | |
1318 | break; | |
1319 | default: | |
1320 | return true; | |
1321 | } | |
1322 | ||
1323 | for_each_pipe(i) { | |
1324 | trans_dp = I915_READ(TRANS_DP_CTL(i)); | |
1325 | if ((trans_dp & TRANS_DP_PORT_SEL_MASK) == trans_sel) { | |
1326 | *pipe = i; | |
1327 | return true; | |
1328 | } | |
1329 | } | |
1330 | } | |
1331 | ||
1332 | DRM_DEBUG_KMS("No pipe for dp port 0x%x found\n", intel_dp->output_reg); | |
d240f20f | 1333 | |
19d8fe15 DV |
1334 | return true; |
1335 | } | |
1336 | ||
e8cb4558 | 1337 | static void intel_disable_dp(struct intel_encoder *encoder) |
d240f20f | 1338 | { |
e8cb4558 | 1339 | struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base); |
6cb49835 DV |
1340 | |
1341 | /* Make sure the panel is off before trying to change the mode. But also | |
1342 | * ensure that we have vdd while we switch off the panel. */ | |
1343 | ironlake_edp_panel_vdd_on(intel_dp); | |
21264c63 | 1344 | ironlake_edp_backlight_off(intel_dp); |
c7ad3810 | 1345 | intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON); |
35a38556 | 1346 | ironlake_edp_panel_off(intel_dp); |
3739850b DV |
1347 | |
1348 | /* cpu edp my only be disable _after_ the cpu pipe/plane is disabled. */ | |
1349 | if (!is_cpu_edp(intel_dp)) | |
1350 | intel_dp_link_down(intel_dp); | |
d240f20f JB |
1351 | } |
1352 | ||
2bd2ad64 DV |
1353 | static void intel_post_disable_dp(struct intel_encoder *encoder) |
1354 | { | |
1355 | struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base); | |
1356 | ||
3739850b DV |
1357 | if (is_cpu_edp(intel_dp)) { |
1358 | intel_dp_link_down(intel_dp); | |
2bd2ad64 | 1359 | ironlake_edp_pll_off(intel_dp); |
3739850b | 1360 | } |
2bd2ad64 DV |
1361 | } |
1362 | ||
e8cb4558 | 1363 | static void intel_enable_dp(struct intel_encoder *encoder) |
d240f20f | 1364 | { |
e8cb4558 DV |
1365 | struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base); |
1366 | struct drm_device *dev = encoder->base.dev; | |
1367 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1368 | uint32_t dp_reg = I915_READ(intel_dp->output_reg); | |
5d613501 | 1369 | |
0c33d8d7 DV |
1370 | if (WARN_ON(dp_reg & DP_PORT_EN)) |
1371 | return; | |
1372 | ||
97af61f5 | 1373 | ironlake_edp_panel_vdd_on(intel_dp); |
f01eca2e | 1374 | intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON); |
0c33d8d7 DV |
1375 | intel_dp_start_link_train(intel_dp); |
1376 | ironlake_edp_panel_on(intel_dp); | |
1377 | ironlake_edp_panel_vdd_off(intel_dp, true); | |
1378 | intel_dp_complete_link_train(intel_dp); | |
f01eca2e | 1379 | ironlake_edp_backlight_on(intel_dp); |
d240f20f JB |
1380 | } |
1381 | ||
2bd2ad64 | 1382 | static void intel_pre_enable_dp(struct intel_encoder *encoder) |
a4fc5ed6 | 1383 | { |
2bd2ad64 | 1384 | struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base); |
0a91ca29 | 1385 | |
2bd2ad64 DV |
1386 | if (is_cpu_edp(intel_dp)) |
1387 | ironlake_edp_pll_on(intel_dp); | |
a4fc5ed6 KP |
1388 | } |
1389 | ||
1390 | /* | |
df0c237d JB |
1391 | * Native read with retry for link status and receiver capability reads for |
1392 | * cases where the sink may still be asleep. | |
a4fc5ed6 KP |
1393 | */ |
1394 | static bool | |
df0c237d JB |
1395 | intel_dp_aux_native_read_retry(struct intel_dp *intel_dp, uint16_t address, |
1396 | uint8_t *recv, int recv_bytes) | |
a4fc5ed6 | 1397 | { |
61da5fab JB |
1398 | int ret, i; |
1399 | ||
df0c237d JB |
1400 | /* |
1401 | * Sinks are *supposed* to come up within 1ms from an off state, | |
1402 | * but we're also supposed to retry 3 times per the spec. | |
1403 | */ | |
61da5fab | 1404 | for (i = 0; i < 3; i++) { |
df0c237d JB |
1405 | ret = intel_dp_aux_native_read(intel_dp, address, recv, |
1406 | recv_bytes); | |
1407 | if (ret == recv_bytes) | |
61da5fab JB |
1408 | return true; |
1409 | msleep(1); | |
1410 | } | |
a4fc5ed6 | 1411 | |
61da5fab | 1412 | return false; |
a4fc5ed6 KP |
1413 | } |
1414 | ||
1415 | /* | |
1416 | * Fetch AUX CH registers 0x202 - 0x207 which contain | |
1417 | * link status information | |
1418 | */ | |
1419 | static bool | |
93f62dad | 1420 | intel_dp_get_link_status(struct intel_dp *intel_dp, uint8_t link_status[DP_LINK_STATUS_SIZE]) |
a4fc5ed6 | 1421 | { |
df0c237d JB |
1422 | return intel_dp_aux_native_read_retry(intel_dp, |
1423 | DP_LANE0_1_STATUS, | |
93f62dad | 1424 | link_status, |
df0c237d | 1425 | DP_LINK_STATUS_SIZE); |
a4fc5ed6 KP |
1426 | } |
1427 | ||
a4fc5ed6 KP |
1428 | #if 0 |
1429 | static char *voltage_names[] = { | |
1430 | "0.4V", "0.6V", "0.8V", "1.2V" | |
1431 | }; | |
1432 | static char *pre_emph_names[] = { | |
1433 | "0dB", "3.5dB", "6dB", "9.5dB" | |
1434 | }; | |
1435 | static char *link_train_names[] = { | |
1436 | "pattern 1", "pattern 2", "idle", "off" | |
1437 | }; | |
1438 | #endif | |
1439 | ||
1440 | /* | |
1441 | * These are source-specific values; current Intel hardware supports | |
1442 | * a maximum voltage of 800mV and a maximum pre-emphasis of 6dB | |
1443 | */ | |
a4fc5ed6 KP |
1444 | |
1445 | static uint8_t | |
1a2eb460 | 1446 | intel_dp_voltage_max(struct intel_dp *intel_dp) |
a4fc5ed6 | 1447 | { |
1a2eb460 KP |
1448 | struct drm_device *dev = intel_dp->base.base.dev; |
1449 | ||
1450 | if (IS_GEN7(dev) && is_cpu_edp(intel_dp)) | |
1451 | return DP_TRAIN_VOLTAGE_SWING_800; | |
1452 | else if (HAS_PCH_CPT(dev) && !is_cpu_edp(intel_dp)) | |
1453 | return DP_TRAIN_VOLTAGE_SWING_1200; | |
1454 | else | |
1455 | return DP_TRAIN_VOLTAGE_SWING_800; | |
1456 | } | |
1457 | ||
1458 | static uint8_t | |
1459 | intel_dp_pre_emphasis_max(struct intel_dp *intel_dp, uint8_t voltage_swing) | |
1460 | { | |
1461 | struct drm_device *dev = intel_dp->base.base.dev; | |
1462 | ||
d6c0d722 PZ |
1463 | if (IS_HASWELL(dev)) { |
1464 | switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) { | |
1465 | case DP_TRAIN_VOLTAGE_SWING_400: | |
1466 | return DP_TRAIN_PRE_EMPHASIS_9_5; | |
1467 | case DP_TRAIN_VOLTAGE_SWING_600: | |
1468 | return DP_TRAIN_PRE_EMPHASIS_6; | |
1469 | case DP_TRAIN_VOLTAGE_SWING_800: | |
1470 | return DP_TRAIN_PRE_EMPHASIS_3_5; | |
1471 | case DP_TRAIN_VOLTAGE_SWING_1200: | |
1472 | default: | |
1473 | return DP_TRAIN_PRE_EMPHASIS_0; | |
1474 | } | |
1475 | } else if (IS_GEN7(dev) && is_cpu_edp(intel_dp) && !IS_VALLEYVIEW(dev)) { | |
1a2eb460 KP |
1476 | switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) { |
1477 | case DP_TRAIN_VOLTAGE_SWING_400: | |
1478 | return DP_TRAIN_PRE_EMPHASIS_6; | |
1479 | case DP_TRAIN_VOLTAGE_SWING_600: | |
1480 | case DP_TRAIN_VOLTAGE_SWING_800: | |
1481 | return DP_TRAIN_PRE_EMPHASIS_3_5; | |
1482 | default: | |
1483 | return DP_TRAIN_PRE_EMPHASIS_0; | |
1484 | } | |
1485 | } else { | |
1486 | switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) { | |
1487 | case DP_TRAIN_VOLTAGE_SWING_400: | |
1488 | return DP_TRAIN_PRE_EMPHASIS_6; | |
1489 | case DP_TRAIN_VOLTAGE_SWING_600: | |
1490 | return DP_TRAIN_PRE_EMPHASIS_6; | |
1491 | case DP_TRAIN_VOLTAGE_SWING_800: | |
1492 | return DP_TRAIN_PRE_EMPHASIS_3_5; | |
1493 | case DP_TRAIN_VOLTAGE_SWING_1200: | |
1494 | default: | |
1495 | return DP_TRAIN_PRE_EMPHASIS_0; | |
1496 | } | |
a4fc5ed6 KP |
1497 | } |
1498 | } | |
1499 | ||
1500 | static void | |
93f62dad | 1501 | intel_get_adjust_train(struct intel_dp *intel_dp, uint8_t link_status[DP_LINK_STATUS_SIZE]) |
a4fc5ed6 KP |
1502 | { |
1503 | uint8_t v = 0; | |
1504 | uint8_t p = 0; | |
1505 | int lane; | |
1a2eb460 KP |
1506 | uint8_t voltage_max; |
1507 | uint8_t preemph_max; | |
a4fc5ed6 | 1508 | |
33a34e4e | 1509 | for (lane = 0; lane < intel_dp->lane_count; lane++) { |
0f037bde DV |
1510 | uint8_t this_v = drm_dp_get_adjust_request_voltage(link_status, lane); |
1511 | uint8_t this_p = drm_dp_get_adjust_request_pre_emphasis(link_status, lane); | |
a4fc5ed6 KP |
1512 | |
1513 | if (this_v > v) | |
1514 | v = this_v; | |
1515 | if (this_p > p) | |
1516 | p = this_p; | |
1517 | } | |
1518 | ||
1a2eb460 | 1519 | voltage_max = intel_dp_voltage_max(intel_dp); |
417e822d KP |
1520 | if (v >= voltage_max) |
1521 | v = voltage_max | DP_TRAIN_MAX_SWING_REACHED; | |
a4fc5ed6 | 1522 | |
1a2eb460 KP |
1523 | preemph_max = intel_dp_pre_emphasis_max(intel_dp, v); |
1524 | if (p >= preemph_max) | |
1525 | p = preemph_max | DP_TRAIN_MAX_PRE_EMPHASIS_REACHED; | |
a4fc5ed6 KP |
1526 | |
1527 | for (lane = 0; lane < 4; lane++) | |
33a34e4e | 1528 | intel_dp->train_set[lane] = v | p; |
a4fc5ed6 KP |
1529 | } |
1530 | ||
1531 | static uint32_t | |
93f62dad | 1532 | intel_dp_signal_levels(uint8_t train_set) |
a4fc5ed6 | 1533 | { |
3cf2efb1 | 1534 | uint32_t signal_levels = 0; |
a4fc5ed6 | 1535 | |
3cf2efb1 | 1536 | switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) { |
a4fc5ed6 KP |
1537 | case DP_TRAIN_VOLTAGE_SWING_400: |
1538 | default: | |
1539 | signal_levels |= DP_VOLTAGE_0_4; | |
1540 | break; | |
1541 | case DP_TRAIN_VOLTAGE_SWING_600: | |
1542 | signal_levels |= DP_VOLTAGE_0_6; | |
1543 | break; | |
1544 | case DP_TRAIN_VOLTAGE_SWING_800: | |
1545 | signal_levels |= DP_VOLTAGE_0_8; | |
1546 | break; | |
1547 | case DP_TRAIN_VOLTAGE_SWING_1200: | |
1548 | signal_levels |= DP_VOLTAGE_1_2; | |
1549 | break; | |
1550 | } | |
3cf2efb1 | 1551 | switch (train_set & DP_TRAIN_PRE_EMPHASIS_MASK) { |
a4fc5ed6 KP |
1552 | case DP_TRAIN_PRE_EMPHASIS_0: |
1553 | default: | |
1554 | signal_levels |= DP_PRE_EMPHASIS_0; | |
1555 | break; | |
1556 | case DP_TRAIN_PRE_EMPHASIS_3_5: | |
1557 | signal_levels |= DP_PRE_EMPHASIS_3_5; | |
1558 | break; | |
1559 | case DP_TRAIN_PRE_EMPHASIS_6: | |
1560 | signal_levels |= DP_PRE_EMPHASIS_6; | |
1561 | break; | |
1562 | case DP_TRAIN_PRE_EMPHASIS_9_5: | |
1563 | signal_levels |= DP_PRE_EMPHASIS_9_5; | |
1564 | break; | |
1565 | } | |
1566 | return signal_levels; | |
1567 | } | |
1568 | ||
e3421a18 ZW |
1569 | /* Gen6's DP voltage swing and pre-emphasis control */ |
1570 | static uint32_t | |
1571 | intel_gen6_edp_signal_levels(uint8_t train_set) | |
1572 | { | |
3c5a62b5 YL |
1573 | int signal_levels = train_set & (DP_TRAIN_VOLTAGE_SWING_MASK | |
1574 | DP_TRAIN_PRE_EMPHASIS_MASK); | |
1575 | switch (signal_levels) { | |
e3421a18 | 1576 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_0: |
3c5a62b5 YL |
1577 | case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_0: |
1578 | return EDP_LINK_TRAIN_400_600MV_0DB_SNB_B; | |
1579 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_3_5: | |
1580 | return EDP_LINK_TRAIN_400MV_3_5DB_SNB_B; | |
e3421a18 | 1581 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_6: |
3c5a62b5 YL |
1582 | case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_6: |
1583 | return EDP_LINK_TRAIN_400_600MV_6DB_SNB_B; | |
e3421a18 | 1584 | case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_3_5: |
3c5a62b5 YL |
1585 | case DP_TRAIN_VOLTAGE_SWING_800 | DP_TRAIN_PRE_EMPHASIS_3_5: |
1586 | return EDP_LINK_TRAIN_600_800MV_3_5DB_SNB_B; | |
e3421a18 | 1587 | case DP_TRAIN_VOLTAGE_SWING_800 | DP_TRAIN_PRE_EMPHASIS_0: |
3c5a62b5 YL |
1588 | case DP_TRAIN_VOLTAGE_SWING_1200 | DP_TRAIN_PRE_EMPHASIS_0: |
1589 | return EDP_LINK_TRAIN_800_1200MV_0DB_SNB_B; | |
e3421a18 | 1590 | default: |
3c5a62b5 YL |
1591 | DRM_DEBUG_KMS("Unsupported voltage swing/pre-emphasis level:" |
1592 | "0x%x\n", signal_levels); | |
1593 | return EDP_LINK_TRAIN_400_600MV_0DB_SNB_B; | |
e3421a18 ZW |
1594 | } |
1595 | } | |
1596 | ||
1a2eb460 KP |
1597 | /* Gen7's DP voltage swing and pre-emphasis control */ |
1598 | static uint32_t | |
1599 | intel_gen7_edp_signal_levels(uint8_t train_set) | |
1600 | { | |
1601 | int signal_levels = train_set & (DP_TRAIN_VOLTAGE_SWING_MASK | | |
1602 | DP_TRAIN_PRE_EMPHASIS_MASK); | |
1603 | switch (signal_levels) { | |
1604 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_0: | |
1605 | return EDP_LINK_TRAIN_400MV_0DB_IVB; | |
1606 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_3_5: | |
1607 | return EDP_LINK_TRAIN_400MV_3_5DB_IVB; | |
1608 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_6: | |
1609 | return EDP_LINK_TRAIN_400MV_6DB_IVB; | |
1610 | ||
1611 | case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_0: | |
1612 | return EDP_LINK_TRAIN_600MV_0DB_IVB; | |
1613 | case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_3_5: | |
1614 | return EDP_LINK_TRAIN_600MV_3_5DB_IVB; | |
1615 | ||
1616 | case DP_TRAIN_VOLTAGE_SWING_800 | DP_TRAIN_PRE_EMPHASIS_0: | |
1617 | return EDP_LINK_TRAIN_800MV_0DB_IVB; | |
1618 | case DP_TRAIN_VOLTAGE_SWING_800 | DP_TRAIN_PRE_EMPHASIS_3_5: | |
1619 | return EDP_LINK_TRAIN_800MV_3_5DB_IVB; | |
1620 | ||
1621 | default: | |
1622 | DRM_DEBUG_KMS("Unsupported voltage swing/pre-emphasis level:" | |
1623 | "0x%x\n", signal_levels); | |
1624 | return EDP_LINK_TRAIN_500MV_0DB_IVB; | |
1625 | } | |
1626 | } | |
1627 | ||
d6c0d722 PZ |
1628 | /* Gen7.5's (HSW) DP voltage swing and pre-emphasis control */ |
1629 | static uint32_t | |
1630 | intel_dp_signal_levels_hsw(uint8_t train_set) | |
1631 | { | |
1632 | int signal_levels = train_set & (DP_TRAIN_VOLTAGE_SWING_MASK | | |
1633 | DP_TRAIN_PRE_EMPHASIS_MASK); | |
1634 | switch (signal_levels) { | |
1635 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_0: | |
1636 | return DDI_BUF_EMP_400MV_0DB_HSW; | |
1637 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_3_5: | |
1638 | return DDI_BUF_EMP_400MV_3_5DB_HSW; | |
1639 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_6: | |
1640 | return DDI_BUF_EMP_400MV_6DB_HSW; | |
1641 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_9_5: | |
1642 | return DDI_BUF_EMP_400MV_9_5DB_HSW; | |
1643 | ||
1644 | case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_0: | |
1645 | return DDI_BUF_EMP_600MV_0DB_HSW; | |
1646 | case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_3_5: | |
1647 | return DDI_BUF_EMP_600MV_3_5DB_HSW; | |
1648 | case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_6: | |
1649 | return DDI_BUF_EMP_600MV_6DB_HSW; | |
1650 | ||
1651 | case DP_TRAIN_VOLTAGE_SWING_800 | DP_TRAIN_PRE_EMPHASIS_0: | |
1652 | return DDI_BUF_EMP_800MV_0DB_HSW; | |
1653 | case DP_TRAIN_VOLTAGE_SWING_800 | DP_TRAIN_PRE_EMPHASIS_3_5: | |
1654 | return DDI_BUF_EMP_800MV_3_5DB_HSW; | |
1655 | default: | |
1656 | DRM_DEBUG_KMS("Unsupported voltage swing/pre-emphasis level:" | |
1657 | "0x%x\n", signal_levels); | |
1658 | return DDI_BUF_EMP_400MV_0DB_HSW; | |
1659 | } | |
1660 | } | |
1661 | ||
a4fc5ed6 | 1662 | static bool |
ea5b213a | 1663 | intel_dp_set_link_train(struct intel_dp *intel_dp, |
a4fc5ed6 | 1664 | uint32_t dp_reg_value, |
58e10eb9 | 1665 | uint8_t dp_train_pat) |
a4fc5ed6 | 1666 | { |
4ef69c7a | 1667 | struct drm_device *dev = intel_dp->base.base.dev; |
a4fc5ed6 | 1668 | struct drm_i915_private *dev_priv = dev->dev_private; |
a4fc5ed6 | 1669 | int ret; |
d6c0d722 | 1670 | uint32_t temp; |
a4fc5ed6 | 1671 | |
d6c0d722 PZ |
1672 | if (IS_HASWELL(dev)) { |
1673 | temp = I915_READ(DP_TP_CTL(intel_dp->port)); | |
1674 | ||
1675 | if (dp_train_pat & DP_LINK_SCRAMBLING_DISABLE) | |
1676 | temp |= DP_TP_CTL_SCRAMBLE_DISABLE; | |
1677 | else | |
1678 | temp &= ~DP_TP_CTL_SCRAMBLE_DISABLE; | |
1679 | ||
1680 | temp &= ~DP_TP_CTL_LINK_TRAIN_MASK; | |
1681 | switch (dp_train_pat & DP_TRAINING_PATTERN_MASK) { | |
1682 | case DP_TRAINING_PATTERN_DISABLE: | |
1683 | temp |= DP_TP_CTL_LINK_TRAIN_IDLE; | |
1684 | I915_WRITE(DP_TP_CTL(intel_dp->port), temp); | |
1685 | ||
1686 | if (wait_for((I915_READ(DP_TP_STATUS(intel_dp->port)) & | |
1687 | DP_TP_STATUS_IDLE_DONE), 1)) | |
1688 | DRM_ERROR("Timed out waiting for DP idle patterns\n"); | |
1689 | ||
1690 | temp &= ~DP_TP_CTL_LINK_TRAIN_MASK; | |
1691 | temp |= DP_TP_CTL_LINK_TRAIN_NORMAL; | |
1692 | ||
1693 | break; | |
1694 | case DP_TRAINING_PATTERN_1: | |
1695 | temp |= DP_TP_CTL_LINK_TRAIN_PAT1; | |
1696 | break; | |
1697 | case DP_TRAINING_PATTERN_2: | |
1698 | temp |= DP_TP_CTL_LINK_TRAIN_PAT2; | |
1699 | break; | |
1700 | case DP_TRAINING_PATTERN_3: | |
1701 | temp |= DP_TP_CTL_LINK_TRAIN_PAT3; | |
1702 | break; | |
1703 | } | |
1704 | I915_WRITE(DP_TP_CTL(intel_dp->port), temp); | |
1705 | ||
1706 | } else if (HAS_PCH_CPT(dev) && | |
1707 | (IS_GEN7(dev) || !is_cpu_edp(intel_dp))) { | |
47ea7542 PZ |
1708 | dp_reg_value &= ~DP_LINK_TRAIN_MASK_CPT; |
1709 | ||
1710 | switch (dp_train_pat & DP_TRAINING_PATTERN_MASK) { | |
1711 | case DP_TRAINING_PATTERN_DISABLE: | |
1712 | dp_reg_value |= DP_LINK_TRAIN_OFF_CPT; | |
1713 | break; | |
1714 | case DP_TRAINING_PATTERN_1: | |
1715 | dp_reg_value |= DP_LINK_TRAIN_PAT_1_CPT; | |
1716 | break; | |
1717 | case DP_TRAINING_PATTERN_2: | |
1718 | dp_reg_value |= DP_LINK_TRAIN_PAT_2_CPT; | |
1719 | break; | |
1720 | case DP_TRAINING_PATTERN_3: | |
1721 | DRM_ERROR("DP training pattern 3 not supported\n"); | |
1722 | dp_reg_value |= DP_LINK_TRAIN_PAT_2_CPT; | |
1723 | break; | |
1724 | } | |
1725 | ||
1726 | } else { | |
1727 | dp_reg_value &= ~DP_LINK_TRAIN_MASK; | |
1728 | ||
1729 | switch (dp_train_pat & DP_TRAINING_PATTERN_MASK) { | |
1730 | case DP_TRAINING_PATTERN_DISABLE: | |
1731 | dp_reg_value |= DP_LINK_TRAIN_OFF; | |
1732 | break; | |
1733 | case DP_TRAINING_PATTERN_1: | |
1734 | dp_reg_value |= DP_LINK_TRAIN_PAT_1; | |
1735 | break; | |
1736 | case DP_TRAINING_PATTERN_2: | |
1737 | dp_reg_value |= DP_LINK_TRAIN_PAT_2; | |
1738 | break; | |
1739 | case DP_TRAINING_PATTERN_3: | |
1740 | DRM_ERROR("DP training pattern 3 not supported\n"); | |
1741 | dp_reg_value |= DP_LINK_TRAIN_PAT_2; | |
1742 | break; | |
1743 | } | |
1744 | } | |
1745 | ||
ea5b213a CW |
1746 | I915_WRITE(intel_dp->output_reg, dp_reg_value); |
1747 | POSTING_READ(intel_dp->output_reg); | |
a4fc5ed6 | 1748 | |
ea5b213a | 1749 | intel_dp_aux_native_write_1(intel_dp, |
a4fc5ed6 KP |
1750 | DP_TRAINING_PATTERN_SET, |
1751 | dp_train_pat); | |
1752 | ||
47ea7542 PZ |
1753 | if ((dp_train_pat & DP_TRAINING_PATTERN_MASK) != |
1754 | DP_TRAINING_PATTERN_DISABLE) { | |
1755 | ret = intel_dp_aux_native_write(intel_dp, | |
1756 | DP_TRAINING_LANE0_SET, | |
1757 | intel_dp->train_set, | |
1758 | intel_dp->lane_count); | |
1759 | if (ret != intel_dp->lane_count) | |
1760 | return false; | |
1761 | } | |
a4fc5ed6 KP |
1762 | |
1763 | return true; | |
1764 | } | |
1765 | ||
33a34e4e | 1766 | /* Enable corresponding port and start training pattern 1 */ |
c19b0669 | 1767 | void |
33a34e4e | 1768 | intel_dp_start_link_train(struct intel_dp *intel_dp) |
a4fc5ed6 | 1769 | { |
c19b0669 PZ |
1770 | struct drm_encoder *encoder = &intel_dp->base.base; |
1771 | struct drm_device *dev = encoder->dev; | |
a4fc5ed6 KP |
1772 | int i; |
1773 | uint8_t voltage; | |
1774 | bool clock_recovery = false; | |
cdb0e95b | 1775 | int voltage_tries, loop_tries; |
ea5b213a | 1776 | uint32_t DP = intel_dp->DP; |
a4fc5ed6 | 1777 | |
c19b0669 PZ |
1778 | if (IS_HASWELL(dev)) |
1779 | intel_ddi_prepare_link_retrain(encoder); | |
1780 | ||
3cf2efb1 CW |
1781 | /* Write the link configuration data */ |
1782 | intel_dp_aux_native_write(intel_dp, DP_LINK_BW_SET, | |
1783 | intel_dp->link_configuration, | |
1784 | DP_LINK_CONFIGURATION_SIZE); | |
a4fc5ed6 KP |
1785 | |
1786 | DP |= DP_PORT_EN; | |
1a2eb460 | 1787 | |
33a34e4e | 1788 | memset(intel_dp->train_set, 0, 4); |
a4fc5ed6 | 1789 | voltage = 0xff; |
cdb0e95b KP |
1790 | voltage_tries = 0; |
1791 | loop_tries = 0; | |
a4fc5ed6 KP |
1792 | clock_recovery = false; |
1793 | for (;;) { | |
33a34e4e | 1794 | /* Use intel_dp->train_set[0] to set the voltage and pre emphasis values */ |
93f62dad | 1795 | uint8_t link_status[DP_LINK_STATUS_SIZE]; |
e3421a18 | 1796 | uint32_t signal_levels; |
417e822d | 1797 | |
d6c0d722 PZ |
1798 | if (IS_HASWELL(dev)) { |
1799 | signal_levels = intel_dp_signal_levels_hsw( | |
1800 | intel_dp->train_set[0]); | |
1801 | DP = (DP & ~DDI_BUF_EMP_MASK) | signal_levels; | |
1802 | } else if (IS_GEN7(dev) && is_cpu_edp(intel_dp) && !IS_VALLEYVIEW(dev)) { | |
1a2eb460 KP |
1803 | signal_levels = intel_gen7_edp_signal_levels(intel_dp->train_set[0]); |
1804 | DP = (DP & ~EDP_LINK_TRAIN_VOL_EMP_MASK_IVB) | signal_levels; | |
1805 | } else if (IS_GEN6(dev) && is_cpu_edp(intel_dp)) { | |
33a34e4e | 1806 | signal_levels = intel_gen6_edp_signal_levels(intel_dp->train_set[0]); |
e3421a18 ZW |
1807 | DP = (DP & ~EDP_LINK_TRAIN_VOL_EMP_MASK_SNB) | signal_levels; |
1808 | } else { | |
93f62dad | 1809 | signal_levels = intel_dp_signal_levels(intel_dp->train_set[0]); |
e3421a18 ZW |
1810 | DP = (DP & ~(DP_VOLTAGE_MASK|DP_PRE_EMPHASIS_MASK)) | signal_levels; |
1811 | } | |
d6c0d722 PZ |
1812 | DRM_DEBUG_KMS("training pattern 1 signal levels %08x\n", |
1813 | signal_levels); | |
a4fc5ed6 | 1814 | |
a7c9655f | 1815 | /* Set training pattern 1 */ |
47ea7542 | 1816 | if (!intel_dp_set_link_train(intel_dp, DP, |
81055854 AJ |
1817 | DP_TRAINING_PATTERN_1 | |
1818 | DP_LINK_SCRAMBLING_DISABLE)) | |
a4fc5ed6 | 1819 | break; |
a4fc5ed6 | 1820 | |
a7c9655f | 1821 | drm_dp_link_train_clock_recovery_delay(intel_dp->dpcd); |
93f62dad KP |
1822 | if (!intel_dp_get_link_status(intel_dp, link_status)) { |
1823 | DRM_ERROR("failed to get link status\n"); | |
a4fc5ed6 | 1824 | break; |
93f62dad | 1825 | } |
a4fc5ed6 | 1826 | |
01916270 | 1827 | if (drm_dp_clock_recovery_ok(link_status, intel_dp->lane_count)) { |
93f62dad | 1828 | DRM_DEBUG_KMS("clock recovery OK\n"); |
3cf2efb1 CW |
1829 | clock_recovery = true; |
1830 | break; | |
1831 | } | |
1832 | ||
1833 | /* Check to see if we've tried the max voltage */ | |
1834 | for (i = 0; i < intel_dp->lane_count; i++) | |
1835 | if ((intel_dp->train_set[i] & DP_TRAIN_MAX_SWING_REACHED) == 0) | |
a4fc5ed6 | 1836 | break; |
0d710688 | 1837 | if (i == intel_dp->lane_count && voltage_tries == 5) { |
24773670 | 1838 | if (++loop_tries == 5) { |
cdb0e95b KP |
1839 | DRM_DEBUG_KMS("too many full retries, give up\n"); |
1840 | break; | |
1841 | } | |
1842 | memset(intel_dp->train_set, 0, 4); | |
1843 | voltage_tries = 0; | |
1844 | continue; | |
1845 | } | |
a4fc5ed6 | 1846 | |
3cf2efb1 | 1847 | /* Check to see if we've tried the same voltage 5 times */ |
24773670 CW |
1848 | if ((intel_dp->train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK) != voltage) { |
1849 | voltage = intel_dp->train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK; | |
cdb0e95b | 1850 | voltage_tries = 0; |
24773670 CW |
1851 | } else |
1852 | ++voltage_tries; | |
a4fc5ed6 | 1853 | |
3cf2efb1 | 1854 | /* Compute new intel_dp->train_set as requested by target */ |
93f62dad | 1855 | intel_get_adjust_train(intel_dp, link_status); |
a4fc5ed6 KP |
1856 | } |
1857 | ||
33a34e4e JB |
1858 | intel_dp->DP = DP; |
1859 | } | |
1860 | ||
c19b0669 | 1861 | void |
33a34e4e JB |
1862 | intel_dp_complete_link_train(struct intel_dp *intel_dp) |
1863 | { | |
4ef69c7a | 1864 | struct drm_device *dev = intel_dp->base.base.dev; |
33a34e4e | 1865 | bool channel_eq = false; |
37f80975 | 1866 | int tries, cr_tries; |
33a34e4e JB |
1867 | uint32_t DP = intel_dp->DP; |
1868 | ||
a4fc5ed6 KP |
1869 | /* channel equalization */ |
1870 | tries = 0; | |
37f80975 | 1871 | cr_tries = 0; |
a4fc5ed6 KP |
1872 | channel_eq = false; |
1873 | for (;;) { | |
33a34e4e | 1874 | /* Use intel_dp->train_set[0] to set the voltage and pre emphasis values */ |
e3421a18 | 1875 | uint32_t signal_levels; |
93f62dad | 1876 | uint8_t link_status[DP_LINK_STATUS_SIZE]; |
e3421a18 | 1877 | |
37f80975 JB |
1878 | if (cr_tries > 5) { |
1879 | DRM_ERROR("failed to train DP, aborting\n"); | |
1880 | intel_dp_link_down(intel_dp); | |
1881 | break; | |
1882 | } | |
1883 | ||
d6c0d722 PZ |
1884 | if (IS_HASWELL(dev)) { |
1885 | signal_levels = intel_dp_signal_levels_hsw(intel_dp->train_set[0]); | |
1886 | DP = (DP & ~DDI_BUF_EMP_MASK) | signal_levels; | |
1887 | } else if (IS_GEN7(dev) && is_cpu_edp(intel_dp) && !IS_VALLEYVIEW(dev)) { | |
1a2eb460 KP |
1888 | signal_levels = intel_gen7_edp_signal_levels(intel_dp->train_set[0]); |
1889 | DP = (DP & ~EDP_LINK_TRAIN_VOL_EMP_MASK_IVB) | signal_levels; | |
1890 | } else if (IS_GEN6(dev) && is_cpu_edp(intel_dp)) { | |
33a34e4e | 1891 | signal_levels = intel_gen6_edp_signal_levels(intel_dp->train_set[0]); |
e3421a18 ZW |
1892 | DP = (DP & ~EDP_LINK_TRAIN_VOL_EMP_MASK_SNB) | signal_levels; |
1893 | } else { | |
93f62dad | 1894 | signal_levels = intel_dp_signal_levels(intel_dp->train_set[0]); |
e3421a18 ZW |
1895 | DP = (DP & ~(DP_VOLTAGE_MASK|DP_PRE_EMPHASIS_MASK)) | signal_levels; |
1896 | } | |
1897 | ||
a4fc5ed6 | 1898 | /* channel eq pattern */ |
47ea7542 | 1899 | if (!intel_dp_set_link_train(intel_dp, DP, |
81055854 AJ |
1900 | DP_TRAINING_PATTERN_2 | |
1901 | DP_LINK_SCRAMBLING_DISABLE)) | |
a4fc5ed6 KP |
1902 | break; |
1903 | ||
a7c9655f | 1904 | drm_dp_link_train_channel_eq_delay(intel_dp->dpcd); |
93f62dad | 1905 | if (!intel_dp_get_link_status(intel_dp, link_status)) |
a4fc5ed6 | 1906 | break; |
a4fc5ed6 | 1907 | |
37f80975 | 1908 | /* Make sure clock is still ok */ |
01916270 | 1909 | if (!drm_dp_clock_recovery_ok(link_status, intel_dp->lane_count)) { |
37f80975 JB |
1910 | intel_dp_start_link_train(intel_dp); |
1911 | cr_tries++; | |
1912 | continue; | |
1913 | } | |
1914 | ||
1ffdff13 | 1915 | if (drm_dp_channel_eq_ok(link_status, intel_dp->lane_count)) { |
3cf2efb1 CW |
1916 | channel_eq = true; |
1917 | break; | |
1918 | } | |
a4fc5ed6 | 1919 | |
37f80975 JB |
1920 | /* Try 5 times, then try clock recovery if that fails */ |
1921 | if (tries > 5) { | |
1922 | intel_dp_link_down(intel_dp); | |
1923 | intel_dp_start_link_train(intel_dp); | |
1924 | tries = 0; | |
1925 | cr_tries++; | |
1926 | continue; | |
1927 | } | |
a4fc5ed6 | 1928 | |
3cf2efb1 | 1929 | /* Compute new intel_dp->train_set as requested by target */ |
93f62dad | 1930 | intel_get_adjust_train(intel_dp, link_status); |
3cf2efb1 | 1931 | ++tries; |
869184a6 | 1932 | } |
3cf2efb1 | 1933 | |
d6c0d722 PZ |
1934 | if (channel_eq) |
1935 | DRM_DEBUG_KMS("Channel EQ done. DP Training successfull\n"); | |
1936 | ||
47ea7542 | 1937 | intel_dp_set_link_train(intel_dp, DP, DP_TRAINING_PATTERN_DISABLE); |
a4fc5ed6 KP |
1938 | } |
1939 | ||
1940 | static void | |
ea5b213a | 1941 | intel_dp_link_down(struct intel_dp *intel_dp) |
a4fc5ed6 | 1942 | { |
4ef69c7a | 1943 | struct drm_device *dev = intel_dp->base.base.dev; |
a4fc5ed6 | 1944 | struct drm_i915_private *dev_priv = dev->dev_private; |
ea5b213a | 1945 | uint32_t DP = intel_dp->DP; |
a4fc5ed6 | 1946 | |
c19b0669 PZ |
1947 | /* |
1948 | * DDI code has a strict mode set sequence and we should try to respect | |
1949 | * it, otherwise we might hang the machine in many different ways. So we | |
1950 | * really should be disabling the port only on a complete crtc_disable | |
1951 | * sequence. This function is just called under two conditions on DDI | |
1952 | * code: | |
1953 | * - Link train failed while doing crtc_enable, and on this case we | |
1954 | * really should respect the mode set sequence and wait for a | |
1955 | * crtc_disable. | |
1956 | * - Someone turned the monitor off and intel_dp_check_link_status | |
1957 | * called us. We don't need to disable the whole port on this case, so | |
1958 | * when someone turns the monitor on again, | |
1959 | * intel_ddi_prepare_link_retrain will take care of redoing the link | |
1960 | * train. | |
1961 | */ | |
1962 | if (IS_HASWELL(dev)) | |
1963 | return; | |
1964 | ||
0c33d8d7 | 1965 | if (WARN_ON((I915_READ(intel_dp->output_reg) & DP_PORT_EN) == 0)) |
1b39d6f3 CW |
1966 | return; |
1967 | ||
28c97730 | 1968 | DRM_DEBUG_KMS("\n"); |
32f9d658 | 1969 | |
1a2eb460 | 1970 | if (HAS_PCH_CPT(dev) && (IS_GEN7(dev) || !is_cpu_edp(intel_dp))) { |
e3421a18 | 1971 | DP &= ~DP_LINK_TRAIN_MASK_CPT; |
ea5b213a | 1972 | I915_WRITE(intel_dp->output_reg, DP | DP_LINK_TRAIN_PAT_IDLE_CPT); |
e3421a18 ZW |
1973 | } else { |
1974 | DP &= ~DP_LINK_TRAIN_MASK; | |
ea5b213a | 1975 | I915_WRITE(intel_dp->output_reg, DP | DP_LINK_TRAIN_PAT_IDLE); |
e3421a18 | 1976 | } |
fe255d00 | 1977 | POSTING_READ(intel_dp->output_reg); |
5eb08b69 | 1978 | |
fe255d00 | 1979 | msleep(17); |
5eb08b69 | 1980 | |
493a7081 | 1981 | if (HAS_PCH_IBX(dev) && |
1b39d6f3 | 1982 | I915_READ(intel_dp->output_reg) & DP_PIPEB_SELECT) { |
31acbcc4 CW |
1983 | struct drm_crtc *crtc = intel_dp->base.base.crtc; |
1984 | ||
5bddd17f EA |
1985 | /* Hardware workaround: leaving our transcoder select |
1986 | * set to transcoder B while it's off will prevent the | |
1987 | * corresponding HDMI output on transcoder A. | |
1988 | * | |
1989 | * Combine this with another hardware workaround: | |
1990 | * transcoder select bit can only be cleared while the | |
1991 | * port is enabled. | |
1992 | */ | |
1993 | DP &= ~DP_PIPEB_SELECT; | |
1994 | I915_WRITE(intel_dp->output_reg, DP); | |
1995 | ||
1996 | /* Changes to enable or select take place the vblank | |
1997 | * after being written. | |
1998 | */ | |
31acbcc4 CW |
1999 | if (crtc == NULL) { |
2000 | /* We can arrive here never having been attached | |
2001 | * to a CRTC, for instance, due to inheriting | |
2002 | * random state from the BIOS. | |
2003 | * | |
2004 | * If the pipe is not running, play safe and | |
2005 | * wait for the clocks to stabilise before | |
2006 | * continuing. | |
2007 | */ | |
2008 | POSTING_READ(intel_dp->output_reg); | |
2009 | msleep(50); | |
2010 | } else | |
2011 | intel_wait_for_vblank(dev, to_intel_crtc(crtc)->pipe); | |
5bddd17f EA |
2012 | } |
2013 | ||
832afda6 | 2014 | DP &= ~DP_AUDIO_OUTPUT_ENABLE; |
ea5b213a CW |
2015 | I915_WRITE(intel_dp->output_reg, DP & ~DP_PORT_EN); |
2016 | POSTING_READ(intel_dp->output_reg); | |
f01eca2e | 2017 | msleep(intel_dp->panel_power_down_delay); |
a4fc5ed6 KP |
2018 | } |
2019 | ||
26d61aad KP |
2020 | static bool |
2021 | intel_dp_get_dpcd(struct intel_dp *intel_dp) | |
92fd8fd1 | 2022 | { |
92fd8fd1 | 2023 | if (intel_dp_aux_native_read_retry(intel_dp, 0x000, intel_dp->dpcd, |
b091cd92 AJ |
2024 | sizeof(intel_dp->dpcd)) == 0) |
2025 | return false; /* aux transfer failed */ | |
92fd8fd1 | 2026 | |
b091cd92 AJ |
2027 | if (intel_dp->dpcd[DP_DPCD_REV] == 0) |
2028 | return false; /* DPCD not present */ | |
2029 | ||
2030 | if (!(intel_dp->dpcd[DP_DOWNSTREAMPORT_PRESENT] & | |
2031 | DP_DWN_STRM_PORT_PRESENT)) | |
2032 | return true; /* native DP sink */ | |
2033 | ||
2034 | if (intel_dp->dpcd[DP_DPCD_REV] == 0x10) | |
2035 | return true; /* no per-port downstream info */ | |
2036 | ||
2037 | if (intel_dp_aux_native_read_retry(intel_dp, DP_DOWNSTREAM_PORT_0, | |
2038 | intel_dp->downstream_ports, | |
2039 | DP_MAX_DOWNSTREAM_PORTS) == 0) | |
2040 | return false; /* downstream port status fetch failed */ | |
2041 | ||
2042 | return true; | |
92fd8fd1 KP |
2043 | } |
2044 | ||
0d198328 AJ |
2045 | static void |
2046 | intel_dp_probe_oui(struct intel_dp *intel_dp) | |
2047 | { | |
2048 | u8 buf[3]; | |
2049 | ||
2050 | if (!(intel_dp->dpcd[DP_DOWN_STREAM_PORT_COUNT] & DP_OUI_SUPPORT)) | |
2051 | return; | |
2052 | ||
351cfc34 DV |
2053 | ironlake_edp_panel_vdd_on(intel_dp); |
2054 | ||
0d198328 AJ |
2055 | if (intel_dp_aux_native_read_retry(intel_dp, DP_SINK_OUI, buf, 3)) |
2056 | DRM_DEBUG_KMS("Sink OUI: %02hx%02hx%02hx\n", | |
2057 | buf[0], buf[1], buf[2]); | |
2058 | ||
2059 | if (intel_dp_aux_native_read_retry(intel_dp, DP_BRANCH_OUI, buf, 3)) | |
2060 | DRM_DEBUG_KMS("Branch OUI: %02hx%02hx%02hx\n", | |
2061 | buf[0], buf[1], buf[2]); | |
351cfc34 DV |
2062 | |
2063 | ironlake_edp_panel_vdd_off(intel_dp, false); | |
0d198328 AJ |
2064 | } |
2065 | ||
a60f0e38 JB |
2066 | static bool |
2067 | intel_dp_get_sink_irq(struct intel_dp *intel_dp, u8 *sink_irq_vector) | |
2068 | { | |
2069 | int ret; | |
2070 | ||
2071 | ret = intel_dp_aux_native_read_retry(intel_dp, | |
2072 | DP_DEVICE_SERVICE_IRQ_VECTOR, | |
2073 | sink_irq_vector, 1); | |
2074 | if (!ret) | |
2075 | return false; | |
2076 | ||
2077 | return true; | |
2078 | } | |
2079 | ||
2080 | static void | |
2081 | intel_dp_handle_test_request(struct intel_dp *intel_dp) | |
2082 | { | |
2083 | /* NAK by default */ | |
9324cf7f | 2084 | intel_dp_aux_native_write_1(intel_dp, DP_TEST_RESPONSE, DP_TEST_NAK); |
a60f0e38 JB |
2085 | } |
2086 | ||
a4fc5ed6 KP |
2087 | /* |
2088 | * According to DP spec | |
2089 | * 5.1.2: | |
2090 | * 1. Read DPCD | |
2091 | * 2. Configure link according to Receiver Capabilities | |
2092 | * 3. Use Link Training from 2.5.3.3 and 3.5.1.3 | |
2093 | * 4. Check link status on receipt of hot-plug interrupt | |
2094 | */ | |
2095 | ||
2096 | static void | |
ea5b213a | 2097 | intel_dp_check_link_status(struct intel_dp *intel_dp) |
a4fc5ed6 | 2098 | { |
a60f0e38 | 2099 | u8 sink_irq_vector; |
93f62dad | 2100 | u8 link_status[DP_LINK_STATUS_SIZE]; |
a60f0e38 | 2101 | |
24e804ba | 2102 | if (!intel_dp->base.connectors_active) |
d2b996ac | 2103 | return; |
59cd09e1 | 2104 | |
24e804ba | 2105 | if (WARN_ON(!intel_dp->base.base.crtc)) |
a4fc5ed6 KP |
2106 | return; |
2107 | ||
92fd8fd1 | 2108 | /* Try to read receiver status if the link appears to be up */ |
93f62dad | 2109 | if (!intel_dp_get_link_status(intel_dp, link_status)) { |
ea5b213a | 2110 | intel_dp_link_down(intel_dp); |
a4fc5ed6 KP |
2111 | return; |
2112 | } | |
2113 | ||
92fd8fd1 | 2114 | /* Now read the DPCD to see if it's actually running */ |
26d61aad | 2115 | if (!intel_dp_get_dpcd(intel_dp)) { |
59cd09e1 JB |
2116 | intel_dp_link_down(intel_dp); |
2117 | return; | |
2118 | } | |
2119 | ||
a60f0e38 JB |
2120 | /* Try to read the source of the interrupt */ |
2121 | if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11 && | |
2122 | intel_dp_get_sink_irq(intel_dp, &sink_irq_vector)) { | |
2123 | /* Clear interrupt source */ | |
2124 | intel_dp_aux_native_write_1(intel_dp, | |
2125 | DP_DEVICE_SERVICE_IRQ_VECTOR, | |
2126 | sink_irq_vector); | |
2127 | ||
2128 | if (sink_irq_vector & DP_AUTOMATED_TEST_REQUEST) | |
2129 | intel_dp_handle_test_request(intel_dp); | |
2130 | if (sink_irq_vector & (DP_CP_IRQ | DP_SINK_SPECIFIC_IRQ)) | |
2131 | DRM_DEBUG_DRIVER("CP or sink specific irq unhandled\n"); | |
2132 | } | |
2133 | ||
1ffdff13 | 2134 | if (!drm_dp_channel_eq_ok(link_status, intel_dp->lane_count)) { |
92fd8fd1 KP |
2135 | DRM_DEBUG_KMS("%s: channel EQ not ok, retraining\n", |
2136 | drm_get_encoder_name(&intel_dp->base.base)); | |
33a34e4e JB |
2137 | intel_dp_start_link_train(intel_dp); |
2138 | intel_dp_complete_link_train(intel_dp); | |
2139 | } | |
a4fc5ed6 | 2140 | } |
a4fc5ed6 | 2141 | |
07d3dc18 | 2142 | /* XXX this is probably wrong for multiple downstream ports */ |
71ba9000 | 2143 | static enum drm_connector_status |
26d61aad | 2144 | intel_dp_detect_dpcd(struct intel_dp *intel_dp) |
71ba9000 | 2145 | { |
07d3dc18 AJ |
2146 | uint8_t *dpcd = intel_dp->dpcd; |
2147 | bool hpd; | |
2148 | uint8_t type; | |
2149 | ||
2150 | if (!intel_dp_get_dpcd(intel_dp)) | |
2151 | return connector_status_disconnected; | |
2152 | ||
2153 | /* if there's no downstream port, we're done */ | |
2154 | if (!(dpcd[DP_DOWNSTREAMPORT_PRESENT] & DP_DWN_STRM_PORT_PRESENT)) | |
2155 | return connector_status_connected; | |
2156 | ||
2157 | /* If we're HPD-aware, SINK_COUNT changes dynamically */ | |
2158 | hpd = !!(intel_dp->downstream_ports[0] & DP_DS_PORT_HPD); | |
2159 | if (hpd) { | |
da131a46 | 2160 | uint8_t reg; |
07d3dc18 | 2161 | if (!intel_dp_aux_native_read_retry(intel_dp, DP_SINK_COUNT, |
da131a46 | 2162 | ®, 1)) |
07d3dc18 | 2163 | return connector_status_unknown; |
da131a46 AJ |
2164 | return DP_GET_SINK_COUNT(reg) ? connector_status_connected |
2165 | : connector_status_disconnected; | |
07d3dc18 AJ |
2166 | } |
2167 | ||
2168 | /* If no HPD, poke DDC gently */ | |
2169 | if (drm_probe_ddc(&intel_dp->adapter)) | |
26d61aad | 2170 | return connector_status_connected; |
07d3dc18 AJ |
2171 | |
2172 | /* Well we tried, say unknown for unreliable port types */ | |
2173 | type = intel_dp->downstream_ports[0] & DP_DS_PORT_TYPE_MASK; | |
2174 | if (type == DP_DS_PORT_TYPE_VGA || type == DP_DS_PORT_TYPE_NON_EDID) | |
2175 | return connector_status_unknown; | |
2176 | ||
2177 | /* Anything else is out of spec, warn and ignore */ | |
2178 | DRM_DEBUG_KMS("Broken DP branch device, ignoring\n"); | |
26d61aad | 2179 | return connector_status_disconnected; |
71ba9000 AJ |
2180 | } |
2181 | ||
5eb08b69 | 2182 | static enum drm_connector_status |
a9756bb5 | 2183 | ironlake_dp_detect(struct intel_dp *intel_dp) |
5eb08b69 | 2184 | { |
5eb08b69 ZW |
2185 | enum drm_connector_status status; |
2186 | ||
fe16d949 CW |
2187 | /* Can't disconnect eDP, but you can close the lid... */ |
2188 | if (is_edp(intel_dp)) { | |
2189 | status = intel_panel_detect(intel_dp->base.base.dev); | |
2190 | if (status == connector_status_unknown) | |
2191 | status = connector_status_connected; | |
2192 | return status; | |
2193 | } | |
01cb9ea6 | 2194 | |
26d61aad | 2195 | return intel_dp_detect_dpcd(intel_dp); |
5eb08b69 ZW |
2196 | } |
2197 | ||
a4fc5ed6 | 2198 | static enum drm_connector_status |
a9756bb5 | 2199 | g4x_dp_detect(struct intel_dp *intel_dp) |
a4fc5ed6 | 2200 | { |
4ef69c7a | 2201 | struct drm_device *dev = intel_dp->base.base.dev; |
a4fc5ed6 | 2202 | struct drm_i915_private *dev_priv = dev->dev_private; |
10f76a38 | 2203 | uint32_t bit; |
5eb08b69 | 2204 | |
ea5b213a | 2205 | switch (intel_dp->output_reg) { |
a4fc5ed6 | 2206 | case DP_B: |
10f76a38 | 2207 | bit = DPB_HOTPLUG_LIVE_STATUS; |
a4fc5ed6 KP |
2208 | break; |
2209 | case DP_C: | |
10f76a38 | 2210 | bit = DPC_HOTPLUG_LIVE_STATUS; |
a4fc5ed6 KP |
2211 | break; |
2212 | case DP_D: | |
10f76a38 | 2213 | bit = DPD_HOTPLUG_LIVE_STATUS; |
a4fc5ed6 KP |
2214 | break; |
2215 | default: | |
2216 | return connector_status_unknown; | |
2217 | } | |
2218 | ||
10f76a38 | 2219 | if ((I915_READ(PORT_HOTPLUG_STAT) & bit) == 0) |
a4fc5ed6 KP |
2220 | return connector_status_disconnected; |
2221 | ||
26d61aad | 2222 | return intel_dp_detect_dpcd(intel_dp); |
a9756bb5 ZW |
2223 | } |
2224 | ||
8c241fef KP |
2225 | static struct edid * |
2226 | intel_dp_get_edid(struct drm_connector *connector, struct i2c_adapter *adapter) | |
2227 | { | |
9cd300e0 | 2228 | struct intel_connector *intel_connector = to_intel_connector(connector); |
d6f24d0f | 2229 | |
9cd300e0 JN |
2230 | /* use cached edid if we have one */ |
2231 | if (intel_connector->edid) { | |
2232 | struct edid *edid; | |
2233 | int size; | |
2234 | ||
2235 | /* invalid edid */ | |
2236 | if (IS_ERR(intel_connector->edid)) | |
d6f24d0f JB |
2237 | return NULL; |
2238 | ||
9cd300e0 | 2239 | size = (intel_connector->edid->extensions + 1) * EDID_LENGTH; |
d6f24d0f JB |
2240 | edid = kmalloc(size, GFP_KERNEL); |
2241 | if (!edid) | |
2242 | return NULL; | |
2243 | ||
9cd300e0 | 2244 | memcpy(edid, intel_connector->edid, size); |
d6f24d0f JB |
2245 | return edid; |
2246 | } | |
8c241fef | 2247 | |
9cd300e0 | 2248 | return drm_get_edid(connector, adapter); |
8c241fef KP |
2249 | } |
2250 | ||
2251 | static int | |
2252 | intel_dp_get_edid_modes(struct drm_connector *connector, struct i2c_adapter *adapter) | |
2253 | { | |
9cd300e0 | 2254 | struct intel_connector *intel_connector = to_intel_connector(connector); |
8c241fef | 2255 | |
9cd300e0 JN |
2256 | /* use cached edid if we have one */ |
2257 | if (intel_connector->edid) { | |
2258 | /* invalid edid */ | |
2259 | if (IS_ERR(intel_connector->edid)) | |
2260 | return 0; | |
2261 | ||
2262 | return intel_connector_update_modes(connector, | |
2263 | intel_connector->edid); | |
d6f24d0f JB |
2264 | } |
2265 | ||
9cd300e0 | 2266 | return intel_ddc_get_modes(connector, adapter); |
8c241fef KP |
2267 | } |
2268 | ||
2269 | ||
a9756bb5 ZW |
2270 | /** |
2271 | * Uses CRT_HOTPLUG_EN and CRT_HOTPLUG_STAT to detect DP connection. | |
2272 | * | |
2273 | * \return true if DP port is connected. | |
2274 | * \return false if DP port is disconnected. | |
2275 | */ | |
2276 | static enum drm_connector_status | |
2277 | intel_dp_detect(struct drm_connector *connector, bool force) | |
2278 | { | |
2279 | struct intel_dp *intel_dp = intel_attached_dp(connector); | |
2280 | struct drm_device *dev = intel_dp->base.base.dev; | |
2281 | enum drm_connector_status status; | |
2282 | struct edid *edid = NULL; | |
2283 | ||
2284 | intel_dp->has_audio = false; | |
2285 | ||
2286 | if (HAS_PCH_SPLIT(dev)) | |
2287 | status = ironlake_dp_detect(intel_dp); | |
2288 | else | |
2289 | status = g4x_dp_detect(intel_dp); | |
1b9be9d0 | 2290 | |
ac66ae83 AJ |
2291 | DRM_DEBUG_KMS("DPCD: %02hx%02hx%02hx%02hx%02hx%02hx%02hx%02hx\n", |
2292 | intel_dp->dpcd[0], intel_dp->dpcd[1], intel_dp->dpcd[2], | |
2293 | intel_dp->dpcd[3], intel_dp->dpcd[4], intel_dp->dpcd[5], | |
2294 | intel_dp->dpcd[6], intel_dp->dpcd[7]); | |
1b9be9d0 | 2295 | |
a9756bb5 ZW |
2296 | if (status != connector_status_connected) |
2297 | return status; | |
2298 | ||
0d198328 AJ |
2299 | intel_dp_probe_oui(intel_dp); |
2300 | ||
c3e5f67b DV |
2301 | if (intel_dp->force_audio != HDMI_AUDIO_AUTO) { |
2302 | intel_dp->has_audio = (intel_dp->force_audio == HDMI_AUDIO_ON); | |
f684960e | 2303 | } else { |
8c241fef | 2304 | edid = intel_dp_get_edid(connector, &intel_dp->adapter); |
f684960e CW |
2305 | if (edid) { |
2306 | intel_dp->has_audio = drm_detect_monitor_audio(edid); | |
f684960e CW |
2307 | kfree(edid); |
2308 | } | |
a9756bb5 ZW |
2309 | } |
2310 | ||
2311 | return connector_status_connected; | |
a4fc5ed6 KP |
2312 | } |
2313 | ||
2314 | static int intel_dp_get_modes(struct drm_connector *connector) | |
2315 | { | |
df0e9248 | 2316 | struct intel_dp *intel_dp = intel_attached_dp(connector); |
dd06f90e | 2317 | struct intel_connector *intel_connector = to_intel_connector(connector); |
4ef69c7a | 2318 | struct drm_device *dev = intel_dp->base.base.dev; |
32f9d658 | 2319 | int ret; |
a4fc5ed6 KP |
2320 | |
2321 | /* We should parse the EDID data and find out if it has an audio sink | |
2322 | */ | |
2323 | ||
8c241fef | 2324 | ret = intel_dp_get_edid_modes(connector, &intel_dp->adapter); |
f8779fda | 2325 | if (ret) |
32f9d658 ZW |
2326 | return ret; |
2327 | ||
f8779fda | 2328 | /* if eDP has no EDID, fall back to fixed mode */ |
dd06f90e | 2329 | if (is_edp(intel_dp) && intel_connector->panel.fixed_mode) { |
f8779fda | 2330 | struct drm_display_mode *mode; |
dd06f90e JN |
2331 | mode = drm_mode_duplicate(dev, |
2332 | intel_connector->panel.fixed_mode); | |
f8779fda | 2333 | if (mode) { |
32f9d658 ZW |
2334 | drm_mode_probed_add(connector, mode); |
2335 | return 1; | |
2336 | } | |
2337 | } | |
2338 | return 0; | |
a4fc5ed6 KP |
2339 | } |
2340 | ||
1aad7ac0 CW |
2341 | static bool |
2342 | intel_dp_detect_audio(struct drm_connector *connector) | |
2343 | { | |
2344 | struct intel_dp *intel_dp = intel_attached_dp(connector); | |
2345 | struct edid *edid; | |
2346 | bool has_audio = false; | |
2347 | ||
8c241fef | 2348 | edid = intel_dp_get_edid(connector, &intel_dp->adapter); |
1aad7ac0 CW |
2349 | if (edid) { |
2350 | has_audio = drm_detect_monitor_audio(edid); | |
1aad7ac0 CW |
2351 | kfree(edid); |
2352 | } | |
2353 | ||
2354 | return has_audio; | |
2355 | } | |
2356 | ||
f684960e CW |
2357 | static int |
2358 | intel_dp_set_property(struct drm_connector *connector, | |
2359 | struct drm_property *property, | |
2360 | uint64_t val) | |
2361 | { | |
e953fd7b | 2362 | struct drm_i915_private *dev_priv = connector->dev->dev_private; |
f684960e CW |
2363 | struct intel_dp *intel_dp = intel_attached_dp(connector); |
2364 | int ret; | |
2365 | ||
2366 | ret = drm_connector_property_set_value(connector, property, val); | |
2367 | if (ret) | |
2368 | return ret; | |
2369 | ||
3f43c48d | 2370 | if (property == dev_priv->force_audio_property) { |
1aad7ac0 CW |
2371 | int i = val; |
2372 | bool has_audio; | |
2373 | ||
2374 | if (i == intel_dp->force_audio) | |
f684960e CW |
2375 | return 0; |
2376 | ||
1aad7ac0 | 2377 | intel_dp->force_audio = i; |
f684960e | 2378 | |
c3e5f67b | 2379 | if (i == HDMI_AUDIO_AUTO) |
1aad7ac0 CW |
2380 | has_audio = intel_dp_detect_audio(connector); |
2381 | else | |
c3e5f67b | 2382 | has_audio = (i == HDMI_AUDIO_ON); |
1aad7ac0 CW |
2383 | |
2384 | if (has_audio == intel_dp->has_audio) | |
f684960e CW |
2385 | return 0; |
2386 | ||
1aad7ac0 | 2387 | intel_dp->has_audio = has_audio; |
f684960e CW |
2388 | goto done; |
2389 | } | |
2390 | ||
e953fd7b CW |
2391 | if (property == dev_priv->broadcast_rgb_property) { |
2392 | if (val == !!intel_dp->color_range) | |
2393 | return 0; | |
2394 | ||
2395 | intel_dp->color_range = val ? DP_COLOR_RANGE_16_235 : 0; | |
2396 | goto done; | |
2397 | } | |
2398 | ||
f684960e CW |
2399 | return -EINVAL; |
2400 | ||
2401 | done: | |
2402 | if (intel_dp->base.base.crtc) { | |
2403 | struct drm_crtc *crtc = intel_dp->base.base.crtc; | |
a6778b3c DV |
2404 | intel_set_mode(crtc, &crtc->mode, |
2405 | crtc->x, crtc->y, crtc->fb); | |
f684960e CW |
2406 | } |
2407 | ||
2408 | return 0; | |
2409 | } | |
2410 | ||
a4fc5ed6 | 2411 | static void |
0206e353 | 2412 | intel_dp_destroy(struct drm_connector *connector) |
a4fc5ed6 | 2413 | { |
aaa6fd2a | 2414 | struct drm_device *dev = connector->dev; |
be3cd5e3 | 2415 | struct intel_dp *intel_dp = intel_attached_dp(connector); |
1d508706 | 2416 | struct intel_connector *intel_connector = to_intel_connector(connector); |
aaa6fd2a | 2417 | |
9cd300e0 JN |
2418 | if (!IS_ERR_OR_NULL(intel_connector->edid)) |
2419 | kfree(intel_connector->edid); | |
2420 | ||
1d508706 | 2421 | if (is_edp(intel_dp)) { |
aaa6fd2a | 2422 | intel_panel_destroy_backlight(dev); |
1d508706 JN |
2423 | intel_panel_fini(&intel_connector->panel); |
2424 | } | |
aaa6fd2a | 2425 | |
a4fc5ed6 KP |
2426 | drm_sysfs_connector_remove(connector); |
2427 | drm_connector_cleanup(connector); | |
55f78c43 | 2428 | kfree(connector); |
a4fc5ed6 KP |
2429 | } |
2430 | ||
24d05927 DV |
2431 | static void intel_dp_encoder_destroy(struct drm_encoder *encoder) |
2432 | { | |
2433 | struct intel_dp *intel_dp = enc_to_intel_dp(encoder); | |
2434 | ||
2435 | i2c_del_adapter(&intel_dp->adapter); | |
2436 | drm_encoder_cleanup(encoder); | |
bd943159 KP |
2437 | if (is_edp(intel_dp)) { |
2438 | cancel_delayed_work_sync(&intel_dp->panel_vdd_work); | |
2439 | ironlake_panel_vdd_off_sync(intel_dp); | |
2440 | } | |
24d05927 DV |
2441 | kfree(intel_dp); |
2442 | } | |
2443 | ||
a4fc5ed6 | 2444 | static const struct drm_encoder_helper_funcs intel_dp_helper_funcs = { |
a4fc5ed6 | 2445 | .mode_fixup = intel_dp_mode_fixup, |
a4fc5ed6 | 2446 | .mode_set = intel_dp_mode_set, |
1f703855 | 2447 | .disable = intel_encoder_noop, |
a4fc5ed6 KP |
2448 | }; |
2449 | ||
a7902ac5 PZ |
2450 | static const struct drm_encoder_helper_funcs intel_dp_helper_funcs_hsw = { |
2451 | .mode_fixup = intel_dp_mode_fixup, | |
2452 | .mode_set = intel_ddi_mode_set, | |
2453 | .disable = intel_encoder_noop, | |
2454 | }; | |
2455 | ||
a4fc5ed6 | 2456 | static const struct drm_connector_funcs intel_dp_connector_funcs = { |
2bd2ad64 | 2457 | .dpms = intel_connector_dpms, |
a4fc5ed6 KP |
2458 | .detect = intel_dp_detect, |
2459 | .fill_modes = drm_helper_probe_single_connector_modes, | |
f684960e | 2460 | .set_property = intel_dp_set_property, |
a4fc5ed6 KP |
2461 | .destroy = intel_dp_destroy, |
2462 | }; | |
2463 | ||
2464 | static const struct drm_connector_helper_funcs intel_dp_connector_helper_funcs = { | |
2465 | .get_modes = intel_dp_get_modes, | |
2466 | .mode_valid = intel_dp_mode_valid, | |
df0e9248 | 2467 | .best_encoder = intel_best_encoder, |
a4fc5ed6 KP |
2468 | }; |
2469 | ||
a4fc5ed6 | 2470 | static const struct drm_encoder_funcs intel_dp_enc_funcs = { |
24d05927 | 2471 | .destroy = intel_dp_encoder_destroy, |
a4fc5ed6 KP |
2472 | }; |
2473 | ||
995b6762 | 2474 | static void |
21d40d37 | 2475 | intel_dp_hot_plug(struct intel_encoder *intel_encoder) |
c8110e52 | 2476 | { |
ea5b213a | 2477 | struct intel_dp *intel_dp = container_of(intel_encoder, struct intel_dp, base); |
c8110e52 | 2478 | |
885a5014 | 2479 | intel_dp_check_link_status(intel_dp); |
c8110e52 | 2480 | } |
6207937d | 2481 | |
e3421a18 ZW |
2482 | /* Return which DP Port should be selected for Transcoder DP control */ |
2483 | int | |
0206e353 | 2484 | intel_trans_dp_port_sel(struct drm_crtc *crtc) |
e3421a18 ZW |
2485 | { |
2486 | struct drm_device *dev = crtc->dev; | |
6c2b7c12 | 2487 | struct intel_encoder *encoder; |
e3421a18 | 2488 | |
6c2b7c12 DV |
2489 | for_each_encoder_on_crtc(dev, crtc, encoder) { |
2490 | struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base); | |
e3421a18 | 2491 | |
417e822d KP |
2492 | if (intel_dp->base.type == INTEL_OUTPUT_DISPLAYPORT || |
2493 | intel_dp->base.type == INTEL_OUTPUT_EDP) | |
ea5b213a | 2494 | return intel_dp->output_reg; |
e3421a18 | 2495 | } |
ea5b213a | 2496 | |
e3421a18 ZW |
2497 | return -1; |
2498 | } | |
2499 | ||
36e83a18 | 2500 | /* check the VBT to see whether the eDP is on DP-D port */ |
cb0953d7 | 2501 | bool intel_dpd_is_edp(struct drm_device *dev) |
36e83a18 ZY |
2502 | { |
2503 | struct drm_i915_private *dev_priv = dev->dev_private; | |
2504 | struct child_device_config *p_child; | |
2505 | int i; | |
2506 | ||
2507 | if (!dev_priv->child_dev_num) | |
2508 | return false; | |
2509 | ||
2510 | for (i = 0; i < dev_priv->child_dev_num; i++) { | |
2511 | p_child = dev_priv->child_dev + i; | |
2512 | ||
2513 | if (p_child->dvo_port == PORT_IDPD && | |
2514 | p_child->device_type == DEVICE_TYPE_eDP) | |
2515 | return true; | |
2516 | } | |
2517 | return false; | |
2518 | } | |
2519 | ||
f684960e CW |
2520 | static void |
2521 | intel_dp_add_properties(struct intel_dp *intel_dp, struct drm_connector *connector) | |
2522 | { | |
3f43c48d | 2523 | intel_attach_force_audio_property(connector); |
e953fd7b | 2524 | intel_attach_broadcast_rgb_property(connector); |
f684960e CW |
2525 | } |
2526 | ||
67a54566 DV |
2527 | static void |
2528 | intel_dp_init_panel_power_sequencer(struct drm_device *dev, | |
2529 | struct intel_dp *intel_dp) | |
2530 | { | |
2531 | struct drm_i915_private *dev_priv = dev->dev_private; | |
2532 | struct edp_power_seq cur, vbt, spec, final; | |
2533 | u32 pp_on, pp_off, pp_div, pp; | |
2534 | ||
2535 | /* Workaround: Need to write PP_CONTROL with the unlock key as | |
2536 | * the very first thing. */ | |
2537 | pp = ironlake_get_pp_control(dev_priv); | |
2538 | I915_WRITE(PCH_PP_CONTROL, pp); | |
2539 | ||
2540 | pp_on = I915_READ(PCH_PP_ON_DELAYS); | |
2541 | pp_off = I915_READ(PCH_PP_OFF_DELAYS); | |
2542 | pp_div = I915_READ(PCH_PP_DIVISOR); | |
2543 | ||
2544 | /* Pull timing values out of registers */ | |
2545 | cur.t1_t3 = (pp_on & PANEL_POWER_UP_DELAY_MASK) >> | |
2546 | PANEL_POWER_UP_DELAY_SHIFT; | |
2547 | ||
2548 | cur.t8 = (pp_on & PANEL_LIGHT_ON_DELAY_MASK) >> | |
2549 | PANEL_LIGHT_ON_DELAY_SHIFT; | |
2550 | ||
2551 | cur.t9 = (pp_off & PANEL_LIGHT_OFF_DELAY_MASK) >> | |
2552 | PANEL_LIGHT_OFF_DELAY_SHIFT; | |
2553 | ||
2554 | cur.t10 = (pp_off & PANEL_POWER_DOWN_DELAY_MASK) >> | |
2555 | PANEL_POWER_DOWN_DELAY_SHIFT; | |
2556 | ||
2557 | cur.t11_t12 = ((pp_div & PANEL_POWER_CYCLE_DELAY_MASK) >> | |
2558 | PANEL_POWER_CYCLE_DELAY_SHIFT) * 1000; | |
2559 | ||
2560 | DRM_DEBUG_KMS("cur t1_t3 %d t8 %d t9 %d t10 %d t11_t12 %d\n", | |
2561 | cur.t1_t3, cur.t8, cur.t9, cur.t10, cur.t11_t12); | |
2562 | ||
2563 | vbt = dev_priv->edp.pps; | |
2564 | ||
2565 | /* Upper limits from eDP 1.3 spec. Note that we use the clunky units of | |
2566 | * our hw here, which are all in 100usec. */ | |
2567 | spec.t1_t3 = 210 * 10; | |
2568 | spec.t8 = 50 * 10; /* no limit for t8, use t7 instead */ | |
2569 | spec.t9 = 50 * 10; /* no limit for t9, make it symmetric with t8 */ | |
2570 | spec.t10 = 500 * 10; | |
2571 | /* This one is special and actually in units of 100ms, but zero | |
2572 | * based in the hw (so we need to add 100 ms). But the sw vbt | |
2573 | * table multiplies it with 1000 to make it in units of 100usec, | |
2574 | * too. */ | |
2575 | spec.t11_t12 = (510 + 100) * 10; | |
2576 | ||
2577 | DRM_DEBUG_KMS("vbt t1_t3 %d t8 %d t9 %d t10 %d t11_t12 %d\n", | |
2578 | vbt.t1_t3, vbt.t8, vbt.t9, vbt.t10, vbt.t11_t12); | |
2579 | ||
2580 | /* Use the max of the register settings and vbt. If both are | |
2581 | * unset, fall back to the spec limits. */ | |
2582 | #define assign_final(field) final.field = (max(cur.field, vbt.field) == 0 ? \ | |
2583 | spec.field : \ | |
2584 | max(cur.field, vbt.field)) | |
2585 | assign_final(t1_t3); | |
2586 | assign_final(t8); | |
2587 | assign_final(t9); | |
2588 | assign_final(t10); | |
2589 | assign_final(t11_t12); | |
2590 | #undef assign_final | |
2591 | ||
2592 | #define get_delay(field) (DIV_ROUND_UP(final.field, 10)) | |
2593 | intel_dp->panel_power_up_delay = get_delay(t1_t3); | |
2594 | intel_dp->backlight_on_delay = get_delay(t8); | |
2595 | intel_dp->backlight_off_delay = get_delay(t9); | |
2596 | intel_dp->panel_power_down_delay = get_delay(t10); | |
2597 | intel_dp->panel_power_cycle_delay = get_delay(t11_t12); | |
2598 | #undef get_delay | |
2599 | ||
2600 | /* And finally store the new values in the power sequencer. */ | |
2601 | pp_on = (final.t1_t3 << PANEL_POWER_UP_DELAY_SHIFT) | | |
2602 | (final.t8 << PANEL_LIGHT_ON_DELAY_SHIFT); | |
2603 | pp_off = (final.t9 << PANEL_LIGHT_OFF_DELAY_SHIFT) | | |
2604 | (final.t10 << PANEL_POWER_DOWN_DELAY_SHIFT); | |
2605 | /* Compute the divisor for the pp clock, simply match the Bspec | |
2606 | * formula. */ | |
2607 | pp_div = ((100 * intel_pch_rawclk(dev))/2 - 1) | |
2608 | << PP_REFERENCE_DIVIDER_SHIFT; | |
2609 | pp_div |= (DIV_ROUND_UP(final.t11_t12, 1000) | |
2610 | << PANEL_POWER_CYCLE_DELAY_SHIFT); | |
2611 | ||
2612 | /* Haswell doesn't have any port selection bits for the panel | |
2613 | * power sequencer any more. */ | |
2614 | if (HAS_PCH_IBX(dev) || HAS_PCH_CPT(dev)) { | |
2615 | if (is_cpu_edp(intel_dp)) | |
2616 | pp_on |= PANEL_POWER_PORT_DP_A; | |
2617 | else | |
2618 | pp_on |= PANEL_POWER_PORT_DP_D; | |
2619 | } | |
2620 | ||
2621 | I915_WRITE(PCH_PP_ON_DELAYS, pp_on); | |
2622 | I915_WRITE(PCH_PP_OFF_DELAYS, pp_off); | |
2623 | I915_WRITE(PCH_PP_DIVISOR, pp_div); | |
2624 | ||
2625 | ||
2626 | DRM_DEBUG_KMS("panel power up delay %d, power down delay %d, power cycle delay %d\n", | |
2627 | intel_dp->panel_power_up_delay, intel_dp->panel_power_down_delay, | |
2628 | intel_dp->panel_power_cycle_delay); | |
2629 | ||
2630 | DRM_DEBUG_KMS("backlight on delay %d, off delay %d\n", | |
2631 | intel_dp->backlight_on_delay, intel_dp->backlight_off_delay); | |
2632 | ||
2633 | DRM_DEBUG_KMS("panel power sequencer register settings: PP_ON %#x, PP_OFF %#x, PP_DIV %#x\n", | |
2634 | I915_READ(PCH_PP_ON_DELAYS), | |
2635 | I915_READ(PCH_PP_OFF_DELAYS), | |
2636 | I915_READ(PCH_PP_DIVISOR)); | |
2637 | } | |
2638 | ||
a4fc5ed6 | 2639 | void |
ab9d7c30 | 2640 | intel_dp_init(struct drm_device *dev, int output_reg, enum port port) |
a4fc5ed6 KP |
2641 | { |
2642 | struct drm_i915_private *dev_priv = dev->dev_private; | |
2643 | struct drm_connector *connector; | |
ea5b213a | 2644 | struct intel_dp *intel_dp; |
21d40d37 | 2645 | struct intel_encoder *intel_encoder; |
55f78c43 | 2646 | struct intel_connector *intel_connector; |
f8779fda | 2647 | struct drm_display_mode *fixed_mode = NULL; |
5eb08b69 | 2648 | const char *name = NULL; |
b329530c | 2649 | int type; |
a4fc5ed6 | 2650 | |
ea5b213a CW |
2651 | intel_dp = kzalloc(sizeof(struct intel_dp), GFP_KERNEL); |
2652 | if (!intel_dp) | |
a4fc5ed6 KP |
2653 | return; |
2654 | ||
3d3dc149 | 2655 | intel_dp->output_reg = output_reg; |
ab9d7c30 | 2656 | intel_dp->port = port; |
0767935e DV |
2657 | /* Preserve the current hw state. */ |
2658 | intel_dp->DP = I915_READ(intel_dp->output_reg); | |
3d3dc149 | 2659 | |
55f78c43 ZW |
2660 | intel_connector = kzalloc(sizeof(struct intel_connector), GFP_KERNEL); |
2661 | if (!intel_connector) { | |
ea5b213a | 2662 | kfree(intel_dp); |
55f78c43 ZW |
2663 | return; |
2664 | } | |
ea5b213a | 2665 | intel_encoder = &intel_dp->base; |
dd06f90e | 2666 | intel_dp->attached_connector = intel_connector; |
55f78c43 | 2667 | |
ea5b213a | 2668 | if (HAS_PCH_SPLIT(dev) && output_reg == PCH_DP_D) |
b329530c | 2669 | if (intel_dpd_is_edp(dev)) |
ea5b213a | 2670 | intel_dp->is_pch_edp = true; |
b329530c | 2671 | |
19c03924 GB |
2672 | /* |
2673 | * FIXME : We need to initialize built-in panels before external panels. | |
2674 | * For X0, DP_C is fixed as eDP. Revisit this as part of VLV eDP cleanup | |
2675 | */ | |
2676 | if (IS_VALLEYVIEW(dev) && output_reg == DP_C) { | |
2677 | type = DRM_MODE_CONNECTOR_eDP; | |
2678 | intel_encoder->type = INTEL_OUTPUT_EDP; | |
2679 | } else if (output_reg == DP_A || is_pch_edp(intel_dp)) { | |
b329530c AJ |
2680 | type = DRM_MODE_CONNECTOR_eDP; |
2681 | intel_encoder->type = INTEL_OUTPUT_EDP; | |
2682 | } else { | |
2683 | type = DRM_MODE_CONNECTOR_DisplayPort; | |
2684 | intel_encoder->type = INTEL_OUTPUT_DISPLAYPORT; | |
2685 | } | |
2686 | ||
55f78c43 | 2687 | connector = &intel_connector->base; |
b329530c | 2688 | drm_connector_init(dev, connector, &intel_dp_connector_funcs, type); |
a4fc5ed6 KP |
2689 | drm_connector_helper_add(connector, &intel_dp_connector_helper_funcs); |
2690 | ||
eb1f8e4f DA |
2691 | connector->polled = DRM_CONNECTOR_POLL_HPD; |
2692 | ||
66a9278e | 2693 | intel_encoder->cloneable = false; |
f8aed700 | 2694 | |
66a9278e DV |
2695 | INIT_DELAYED_WORK(&intel_dp->panel_vdd_work, |
2696 | ironlake_panel_vdd_work); | |
6251ec0a | 2697 | |
27f8227b | 2698 | intel_encoder->crtc_mask = (1 << 0) | (1 << 1) | (1 << 2); |
ee7b9f93 | 2699 | |
a4fc5ed6 KP |
2700 | connector->interlace_allowed = true; |
2701 | connector->doublescan_allowed = 0; | |
2702 | ||
4ef69c7a | 2703 | drm_encoder_init(dev, &intel_encoder->base, &intel_dp_enc_funcs, |
a4fc5ed6 | 2704 | DRM_MODE_ENCODER_TMDS); |
a7902ac5 PZ |
2705 | |
2706 | if (IS_HASWELL(dev)) | |
2707 | drm_encoder_helper_add(&intel_encoder->base, | |
2708 | &intel_dp_helper_funcs_hsw); | |
2709 | else | |
2710 | drm_encoder_helper_add(&intel_encoder->base, | |
2711 | &intel_dp_helper_funcs); | |
a4fc5ed6 | 2712 | |
df0e9248 | 2713 | intel_connector_attach_encoder(intel_connector, intel_encoder); |
a4fc5ed6 KP |
2714 | drm_sysfs_connector_add(connector); |
2715 | ||
a7902ac5 PZ |
2716 | if (IS_HASWELL(dev)) { |
2717 | intel_encoder->enable = intel_enable_ddi; | |
2718 | intel_encoder->pre_enable = intel_ddi_pre_enable; | |
2719 | intel_encoder->disable = intel_disable_ddi; | |
2720 | intel_encoder->post_disable = intel_ddi_post_disable; | |
2721 | intel_encoder->get_hw_state = intel_ddi_get_hw_state; | |
2722 | } else { | |
2723 | intel_encoder->enable = intel_enable_dp; | |
2724 | intel_encoder->pre_enable = intel_pre_enable_dp; | |
2725 | intel_encoder->disable = intel_disable_dp; | |
2726 | intel_encoder->post_disable = intel_post_disable_dp; | |
2727 | intel_encoder->get_hw_state = intel_dp_get_hw_state; | |
2728 | } | |
19d8fe15 | 2729 | intel_connector->get_hw_state = intel_connector_get_hw_state; |
e8cb4558 | 2730 | |
a4fc5ed6 | 2731 | /* Set up the DDC bus. */ |
ab9d7c30 PZ |
2732 | switch (port) { |
2733 | case PORT_A: | |
2734 | name = "DPDDC-A"; | |
2735 | break; | |
2736 | case PORT_B: | |
2737 | dev_priv->hotplug_supported_mask |= DPB_HOTPLUG_INT_STATUS; | |
2738 | name = "DPDDC-B"; | |
2739 | break; | |
2740 | case PORT_C: | |
2741 | dev_priv->hotplug_supported_mask |= DPC_HOTPLUG_INT_STATUS; | |
2742 | name = "DPDDC-C"; | |
2743 | break; | |
2744 | case PORT_D: | |
2745 | dev_priv->hotplug_supported_mask |= DPD_HOTPLUG_INT_STATUS; | |
2746 | name = "DPDDC-D"; | |
2747 | break; | |
2748 | default: | |
2749 | WARN(1, "Invalid port %c\n", port_name(port)); | |
2750 | break; | |
5eb08b69 ZW |
2751 | } |
2752 | ||
67a54566 DV |
2753 | if (is_edp(intel_dp)) |
2754 | intel_dp_init_panel_power_sequencer(dev, intel_dp); | |
c1f05264 DA |
2755 | |
2756 | intel_dp_i2c_init(intel_dp, intel_connector, name); | |
2757 | ||
67a54566 | 2758 | /* Cache DPCD and EDID for edp. */ |
c1f05264 DA |
2759 | if (is_edp(intel_dp)) { |
2760 | bool ret; | |
f8779fda | 2761 | struct drm_display_mode *scan; |
c1f05264 | 2762 | struct edid *edid; |
5d613501 JB |
2763 | |
2764 | ironlake_edp_panel_vdd_on(intel_dp); | |
59f3e272 | 2765 | ret = intel_dp_get_dpcd(intel_dp); |
bd943159 | 2766 | ironlake_edp_panel_vdd_off(intel_dp, false); |
99ea7127 | 2767 | |
59f3e272 | 2768 | if (ret) { |
7183dc29 JB |
2769 | if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11) |
2770 | dev_priv->no_aux_handshake = | |
2771 | intel_dp->dpcd[DP_MAX_DOWNSPREAD] & | |
89667383 JB |
2772 | DP_NO_AUX_HANDSHAKE_LINK_TRAINING; |
2773 | } else { | |
3d3dc149 | 2774 | /* if this fails, presume the device is a ghost */ |
48898b03 | 2775 | DRM_INFO("failed to retrieve link info, disabling eDP\n"); |
3d3dc149 | 2776 | intel_dp_encoder_destroy(&intel_dp->base.base); |
48898b03 | 2777 | intel_dp_destroy(&intel_connector->base); |
3d3dc149 | 2778 | return; |
89667383 | 2779 | } |
89667383 | 2780 | |
d6f24d0f JB |
2781 | ironlake_edp_panel_vdd_on(intel_dp); |
2782 | edid = drm_get_edid(connector, &intel_dp->adapter); | |
2783 | if (edid) { | |
9cd300e0 JN |
2784 | if (drm_add_edid_modes(connector, edid)) { |
2785 | drm_mode_connector_update_edid_property(connector, edid); | |
2786 | drm_edid_to_eld(connector, edid); | |
2787 | } else { | |
2788 | kfree(edid); | |
2789 | edid = ERR_PTR(-EINVAL); | |
2790 | } | |
2791 | } else { | |
2792 | edid = ERR_PTR(-ENOENT); | |
d6f24d0f | 2793 | } |
9cd300e0 | 2794 | intel_connector->edid = edid; |
f8779fda JN |
2795 | |
2796 | /* prefer fixed mode from EDID if available */ | |
2797 | list_for_each_entry(scan, &connector->probed_modes, head) { | |
2798 | if ((scan->type & DRM_MODE_TYPE_PREFERRED)) { | |
2799 | fixed_mode = drm_mode_duplicate(dev, scan); | |
2800 | break; | |
2801 | } | |
2802 | } | |
2803 | ||
2804 | /* fallback to VBT if available for eDP */ | |
2805 | if (!fixed_mode && dev_priv->lfp_lvds_vbt_mode) { | |
2806 | fixed_mode = drm_mode_duplicate(dev, dev_priv->lfp_lvds_vbt_mode); | |
2807 | if (fixed_mode) | |
2808 | fixed_mode->type |= DRM_MODE_TYPE_PREFERRED; | |
2809 | } | |
f8779fda | 2810 | |
d6f24d0f JB |
2811 | ironlake_edp_panel_vdd_off(intel_dp, false); |
2812 | } | |
552fb0b7 | 2813 | |
21d40d37 | 2814 | intel_encoder->hot_plug = intel_dp_hot_plug; |
a4fc5ed6 | 2815 | |
1d508706 | 2816 | if (is_edp(intel_dp)) { |
dd06f90e | 2817 | intel_panel_init(&intel_connector->panel, fixed_mode); |
0657b6b1 | 2818 | intel_panel_setup_backlight(connector); |
1d508706 | 2819 | } |
32f9d658 | 2820 | |
f684960e CW |
2821 | intel_dp_add_properties(intel_dp, connector); |
2822 | ||
a4fc5ed6 KP |
2823 | /* For G4X desktop chip, PEG_BAND_GAP_DATA 3:0 must first be written |
2824 | * 0xd. Failure to do so will result in spurious interrupts being | |
2825 | * generated on the port when a cable is not attached. | |
2826 | */ | |
2827 | if (IS_G4X(dev) && !IS_GM45(dev)) { | |
2828 | u32 temp = I915_READ(PEG_BAND_GAP_DATA); | |
2829 | I915_WRITE(PEG_BAND_GAP_DATA, (temp & ~0xf) | 0xd); | |
2830 | } | |
2831 | } |