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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 | { | |
da63a9f2 PZ |
50 | struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp); |
51 | ||
52 | return intel_dig_port->base.type == INTEL_OUTPUT_EDP; | |
cfcb0fc9 JB |
53 | } |
54 | ||
55 | /** | |
56 | * is_pch_edp - is the port on the PCH and attached to an eDP panel? | |
57 | * @intel_dp: DP struct | |
58 | * | |
59 | * Returns true if the given DP struct corresponds to a PCH DP port attached | |
60 | * to an eDP panel, false otherwise. Helpful for determining whether we | |
61 | * may need FDI resources for a given DP output or not. | |
62 | */ | |
63 | static bool is_pch_edp(struct intel_dp *intel_dp) | |
64 | { | |
65 | return intel_dp->is_pch_edp; | |
66 | } | |
67 | ||
1c95822a AJ |
68 | /** |
69 | * is_cpu_edp - is the port on the CPU and attached to an eDP panel? | |
70 | * @intel_dp: DP struct | |
71 | * | |
72 | * Returns true if the given DP struct corresponds to a CPU eDP port. | |
73 | */ | |
74 | static bool is_cpu_edp(struct intel_dp *intel_dp) | |
75 | { | |
76 | return is_edp(intel_dp) && !is_pch_edp(intel_dp); | |
77 | } | |
78 | ||
30add22d | 79 | static struct drm_device *intel_dp_to_dev(struct intel_dp *intel_dp) |
ea5b213a | 80 | { |
da63a9f2 PZ |
81 | struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp); |
82 | ||
83 | return intel_dig_port->base.base.dev; | |
ea5b213a | 84 | } |
a4fc5ed6 | 85 | |
df0e9248 CW |
86 | static struct intel_dp *intel_attached_dp(struct drm_connector *connector) |
87 | { | |
fa90ecef | 88 | return enc_to_intel_dp(&intel_attached_encoder(connector)->base); |
df0e9248 CW |
89 | } |
90 | ||
814948ad JB |
91 | /** |
92 | * intel_encoder_is_pch_edp - is the given encoder a PCH attached eDP? | |
93 | * @encoder: DRM encoder | |
94 | * | |
95 | * Return true if @encoder corresponds to a PCH attached eDP panel. Needed | |
96 | * by intel_display.c. | |
97 | */ | |
98 | bool intel_encoder_is_pch_edp(struct drm_encoder *encoder) | |
99 | { | |
100 | struct intel_dp *intel_dp; | |
101 | ||
102 | if (!encoder) | |
103 | return false; | |
104 | ||
105 | intel_dp = enc_to_intel_dp(encoder); | |
106 | ||
107 | return is_pch_edp(intel_dp); | |
108 | } | |
109 | ||
ea5b213a | 110 | static void intel_dp_link_down(struct intel_dp *intel_dp); |
a4fc5ed6 | 111 | |
32f9d658 | 112 | void |
0206e353 | 113 | intel_edp_link_config(struct intel_encoder *intel_encoder, |
ea5b213a | 114 | int *lane_num, int *link_bw) |
32f9d658 | 115 | { |
fa90ecef | 116 | struct intel_dp *intel_dp = enc_to_intel_dp(&intel_encoder->base); |
32f9d658 | 117 | |
ea5b213a | 118 | *lane_num = intel_dp->lane_count; |
3b5c662e | 119 | *link_bw = drm_dp_bw_code_to_link_rate(intel_dp->link_bw); |
32f9d658 ZW |
120 | } |
121 | ||
94bf2ced DV |
122 | int |
123 | intel_edp_target_clock(struct intel_encoder *intel_encoder, | |
124 | struct drm_display_mode *mode) | |
125 | { | |
fa90ecef | 126 | struct intel_dp *intel_dp = enc_to_intel_dp(&intel_encoder->base); |
dd06f90e | 127 | struct intel_connector *intel_connector = intel_dp->attached_connector; |
94bf2ced | 128 | |
dd06f90e JN |
129 | if (intel_connector->panel.fixed_mode) |
130 | return intel_connector->panel.fixed_mode->clock; | |
94bf2ced DV |
131 | else |
132 | return mode->clock; | |
133 | } | |
134 | ||
a4fc5ed6 | 135 | static int |
ea5b213a | 136 | intel_dp_max_link_bw(struct intel_dp *intel_dp) |
a4fc5ed6 | 137 | { |
7183dc29 | 138 | int max_link_bw = intel_dp->dpcd[DP_MAX_LINK_RATE]; |
a4fc5ed6 KP |
139 | |
140 | switch (max_link_bw) { | |
141 | case DP_LINK_BW_1_62: | |
142 | case DP_LINK_BW_2_7: | |
143 | break; | |
144 | default: | |
145 | max_link_bw = DP_LINK_BW_1_62; | |
146 | break; | |
147 | } | |
148 | return max_link_bw; | |
149 | } | |
150 | ||
cd9dde44 AJ |
151 | /* |
152 | * The units on the numbers in the next two are... bizarre. Examples will | |
153 | * make it clearer; this one parallels an example in the eDP spec. | |
154 | * | |
155 | * intel_dp_max_data_rate for one lane of 2.7GHz evaluates as: | |
156 | * | |
157 | * 270000 * 1 * 8 / 10 == 216000 | |
158 | * | |
159 | * The actual data capacity of that configuration is 2.16Gbit/s, so the | |
160 | * units are decakilobits. ->clock in a drm_display_mode is in kilohertz - | |
161 | * or equivalently, kilopixels per second - so for 1680x1050R it'd be | |
162 | * 119000. At 18bpp that's 2142000 kilobits per second. | |
163 | * | |
164 | * Thus the strange-looking division by 10 in intel_dp_link_required, to | |
165 | * get the result in decakilobits instead of kilobits. | |
166 | */ | |
167 | ||
a4fc5ed6 | 168 | static int |
c898261c | 169 | intel_dp_link_required(int pixel_clock, int bpp) |
a4fc5ed6 | 170 | { |
cd9dde44 | 171 | return (pixel_clock * bpp + 9) / 10; |
a4fc5ed6 KP |
172 | } |
173 | ||
fe27d53e DA |
174 | static int |
175 | intel_dp_max_data_rate(int max_link_clock, int max_lanes) | |
176 | { | |
177 | return (max_link_clock * max_lanes * 8) / 10; | |
178 | } | |
179 | ||
c4867936 DV |
180 | static bool |
181 | intel_dp_adjust_dithering(struct intel_dp *intel_dp, | |
182 | struct drm_display_mode *mode, | |
cb1793ce | 183 | bool adjust_mode) |
c4867936 | 184 | { |
9fa5f652 PZ |
185 | int max_link_clock = |
186 | drm_dp_bw_code_to_link_rate(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 | { | |
30add22d | 295 | struct drm_device *dev = intel_dp_to_dev(intel_dp); |
ebf33b18 KP |
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 | { | |
30add22d | 303 | struct drm_device *dev = intel_dp_to_dev(intel_dp); |
ebf33b18 KP |
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 | { | |
30add22d | 312 | struct drm_device *dev = intel_dp_to_dev(intel_dp); |
9b984dae | 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 | ||
9ee32fea DV |
325 | static uint32_t |
326 | intel_dp_aux_wait_done(struct intel_dp *intel_dp, bool has_aux_irq) | |
327 | { | |
328 | struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp); | |
329 | struct drm_device *dev = intel_dig_port->base.base.dev; | |
330 | struct drm_i915_private *dev_priv = dev->dev_private; | |
331 | uint32_t ch_ctl = intel_dp->output_reg + 0x10; | |
332 | uint32_t status; | |
333 | bool done; | |
334 | ||
335 | if (IS_HASWELL(dev)) { | |
336 | switch (intel_dig_port->port) { | |
337 | case PORT_A: | |
338 | ch_ctl = DPA_AUX_CH_CTL; | |
339 | break; | |
340 | case PORT_B: | |
341 | ch_ctl = PCH_DPB_AUX_CH_CTL; | |
342 | break; | |
343 | case PORT_C: | |
344 | ch_ctl = PCH_DPC_AUX_CH_CTL; | |
345 | break; | |
346 | case PORT_D: | |
347 | ch_ctl = PCH_DPD_AUX_CH_CTL; | |
348 | break; | |
349 | default: | |
350 | BUG(); | |
351 | } | |
352 | } | |
353 | ||
ef04f00d | 354 | #define C (((status = I915_READ_NOTRACE(ch_ctl)) & DP_AUX_CH_CTL_SEND_BUSY) == 0) |
9ee32fea DV |
355 | if (has_aux_irq) |
356 | done = wait_event_timeout(dev_priv->gmbus_wait_queue, C, 10); | |
357 | else | |
358 | done = wait_for_atomic(C, 10) == 0; | |
359 | if (!done) | |
360 | DRM_ERROR("dp aux hw did not signal timeout (has irq: %i)!\n", | |
361 | has_aux_irq); | |
362 | #undef C | |
363 | ||
364 | return status; | |
365 | } | |
366 | ||
a4fc5ed6 | 367 | static int |
ea5b213a | 368 | intel_dp_aux_ch(struct intel_dp *intel_dp, |
a4fc5ed6 KP |
369 | uint8_t *send, int send_bytes, |
370 | uint8_t *recv, int recv_size) | |
371 | { | |
ea5b213a | 372 | uint32_t output_reg = intel_dp->output_reg; |
174edf1f PZ |
373 | struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp); |
374 | struct drm_device *dev = intel_dig_port->base.base.dev; | |
a4fc5ed6 KP |
375 | struct drm_i915_private *dev_priv = dev->dev_private; |
376 | uint32_t ch_ctl = output_reg + 0x10; | |
377 | uint32_t ch_data = ch_ctl + 4; | |
9ee32fea | 378 | int i, ret, recv_bytes; |
a4fc5ed6 | 379 | uint32_t status; |
fb0f8fbf | 380 | uint32_t aux_clock_divider; |
6b4e0a93 | 381 | int try, precharge; |
9ee32fea DV |
382 | bool has_aux_irq = INTEL_INFO(dev)->gen >= 5 && !IS_VALLEYVIEW(dev); |
383 | ||
384 | /* dp aux is extremely sensitive to irq latency, hence request the | |
385 | * lowest possible wakeup latency and so prevent the cpu from going into | |
386 | * deep sleep states. | |
387 | */ | |
388 | pm_qos_update_request(&dev_priv->pm_qos, 0); | |
a4fc5ed6 | 389 | |
750eb99e | 390 | if (IS_HASWELL(dev)) { |
174edf1f | 391 | switch (intel_dig_port->port) { |
750eb99e PZ |
392 | case PORT_A: |
393 | ch_ctl = DPA_AUX_CH_CTL; | |
394 | ch_data = DPA_AUX_CH_DATA1; | |
395 | break; | |
396 | case PORT_B: | |
397 | ch_ctl = PCH_DPB_AUX_CH_CTL; | |
398 | ch_data = PCH_DPB_AUX_CH_DATA1; | |
399 | break; | |
400 | case PORT_C: | |
401 | ch_ctl = PCH_DPC_AUX_CH_CTL; | |
402 | ch_data = PCH_DPC_AUX_CH_DATA1; | |
403 | break; | |
404 | case PORT_D: | |
405 | ch_ctl = PCH_DPD_AUX_CH_CTL; | |
406 | ch_data = PCH_DPD_AUX_CH_DATA1; | |
407 | break; | |
408 | default: | |
409 | BUG(); | |
410 | } | |
411 | } | |
412 | ||
9b984dae | 413 | intel_dp_check_edp(intel_dp); |
a4fc5ed6 | 414 | /* The clock divider is based off the hrawclk, |
fb0f8fbf KP |
415 | * and would like to run at 2MHz. So, take the |
416 | * hrawclk value and divide by 2 and use that | |
6176b8f9 JB |
417 | * |
418 | * Note that PCH attached eDP panels should use a 125MHz input | |
419 | * clock divider. | |
a4fc5ed6 | 420 | */ |
1c95822a | 421 | if (is_cpu_edp(intel_dp)) { |
affa9354 | 422 | if (HAS_DDI(dev)) |
b8fc2f6a PZ |
423 | aux_clock_divider = intel_ddi_get_cdclk_freq(dev_priv) >> 1; |
424 | else if (IS_VALLEYVIEW(dev)) | |
9473c8f4 VP |
425 | aux_clock_divider = 100; |
426 | else if (IS_GEN6(dev) || IS_GEN7(dev)) | |
1a2eb460 | 427 | aux_clock_divider = 200; /* SNB & IVB eDP input clock at 400Mhz */ |
e3421a18 ZW |
428 | else |
429 | aux_clock_divider = 225; /* eDP input clock at 450Mhz */ | |
430 | } else if (HAS_PCH_SPLIT(dev)) | |
6b3ec1c9 | 431 | aux_clock_divider = DIV_ROUND_UP(intel_pch_rawclk(dev), 2); |
5eb08b69 ZW |
432 | else |
433 | aux_clock_divider = intel_hrawclk(dev) / 2; | |
434 | ||
6b4e0a93 DV |
435 | if (IS_GEN6(dev)) |
436 | precharge = 3; | |
437 | else | |
438 | precharge = 5; | |
439 | ||
11bee43e JB |
440 | /* Try to wait for any previous AUX channel activity */ |
441 | for (try = 0; try < 3; try++) { | |
ef04f00d | 442 | status = I915_READ_NOTRACE(ch_ctl); |
11bee43e JB |
443 | if ((status & DP_AUX_CH_CTL_SEND_BUSY) == 0) |
444 | break; | |
445 | msleep(1); | |
446 | } | |
447 | ||
448 | if (try == 3) { | |
449 | WARN(1, "dp_aux_ch not started status 0x%08x\n", | |
450 | I915_READ(ch_ctl)); | |
9ee32fea DV |
451 | ret = -EBUSY; |
452 | goto out; | |
4f7f7b7e CW |
453 | } |
454 | ||
fb0f8fbf KP |
455 | /* Must try at least 3 times according to DP spec */ |
456 | for (try = 0; try < 5; try++) { | |
457 | /* Load the send data into the aux channel data registers */ | |
4f7f7b7e CW |
458 | for (i = 0; i < send_bytes; i += 4) |
459 | I915_WRITE(ch_data + i, | |
460 | pack_aux(send + i, send_bytes - i)); | |
0206e353 | 461 | |
fb0f8fbf | 462 | /* Send the command and wait for it to complete */ |
4f7f7b7e CW |
463 | I915_WRITE(ch_ctl, |
464 | DP_AUX_CH_CTL_SEND_BUSY | | |
9ee32fea | 465 | (has_aux_irq ? DP_AUX_CH_CTL_INTERRUPT : 0) | |
4f7f7b7e CW |
466 | DP_AUX_CH_CTL_TIME_OUT_400us | |
467 | (send_bytes << DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT) | | |
468 | (precharge << DP_AUX_CH_CTL_PRECHARGE_2US_SHIFT) | | |
469 | (aux_clock_divider << DP_AUX_CH_CTL_BIT_CLOCK_2X_SHIFT) | | |
470 | DP_AUX_CH_CTL_DONE | | |
471 | DP_AUX_CH_CTL_TIME_OUT_ERROR | | |
472 | DP_AUX_CH_CTL_RECEIVE_ERROR); | |
9ee32fea DV |
473 | |
474 | status = intel_dp_aux_wait_done(intel_dp, has_aux_irq); | |
0206e353 | 475 | |
fb0f8fbf | 476 | /* Clear done status and any errors */ |
4f7f7b7e CW |
477 | I915_WRITE(ch_ctl, |
478 | status | | |
479 | DP_AUX_CH_CTL_DONE | | |
480 | DP_AUX_CH_CTL_TIME_OUT_ERROR | | |
481 | DP_AUX_CH_CTL_RECEIVE_ERROR); | |
d7e96fea AJ |
482 | |
483 | if (status & (DP_AUX_CH_CTL_TIME_OUT_ERROR | | |
484 | DP_AUX_CH_CTL_RECEIVE_ERROR)) | |
485 | continue; | |
4f7f7b7e | 486 | if (status & DP_AUX_CH_CTL_DONE) |
a4fc5ed6 KP |
487 | break; |
488 | } | |
489 | ||
a4fc5ed6 | 490 | if ((status & DP_AUX_CH_CTL_DONE) == 0) { |
1ae8c0a5 | 491 | DRM_ERROR("dp_aux_ch not done status 0x%08x\n", status); |
9ee32fea DV |
492 | ret = -EBUSY; |
493 | goto out; | |
a4fc5ed6 KP |
494 | } |
495 | ||
496 | /* Check for timeout or receive error. | |
497 | * Timeouts occur when the sink is not connected | |
498 | */ | |
a5b3da54 | 499 | if (status & DP_AUX_CH_CTL_RECEIVE_ERROR) { |
1ae8c0a5 | 500 | DRM_ERROR("dp_aux_ch receive error status 0x%08x\n", status); |
9ee32fea DV |
501 | ret = -EIO; |
502 | goto out; | |
a5b3da54 | 503 | } |
1ae8c0a5 KP |
504 | |
505 | /* Timeouts occur when the device isn't connected, so they're | |
506 | * "normal" -- don't fill the kernel log with these */ | |
a5b3da54 | 507 | if (status & DP_AUX_CH_CTL_TIME_OUT_ERROR) { |
28c97730 | 508 | DRM_DEBUG_KMS("dp_aux_ch timeout status 0x%08x\n", status); |
9ee32fea DV |
509 | ret = -ETIMEDOUT; |
510 | goto out; | |
a4fc5ed6 KP |
511 | } |
512 | ||
513 | /* Unload any bytes sent back from the other side */ | |
514 | recv_bytes = ((status & DP_AUX_CH_CTL_MESSAGE_SIZE_MASK) >> | |
515 | DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT); | |
a4fc5ed6 KP |
516 | if (recv_bytes > recv_size) |
517 | recv_bytes = recv_size; | |
0206e353 | 518 | |
4f7f7b7e CW |
519 | for (i = 0; i < recv_bytes; i += 4) |
520 | unpack_aux(I915_READ(ch_data + i), | |
521 | recv + i, recv_bytes - i); | |
a4fc5ed6 | 522 | |
9ee32fea DV |
523 | ret = recv_bytes; |
524 | out: | |
525 | pm_qos_update_request(&dev_priv->pm_qos, PM_QOS_DEFAULT_VALUE); | |
526 | ||
527 | return ret; | |
a4fc5ed6 KP |
528 | } |
529 | ||
530 | /* Write data to the aux channel in native mode */ | |
531 | static int | |
ea5b213a | 532 | intel_dp_aux_native_write(struct intel_dp *intel_dp, |
a4fc5ed6 KP |
533 | uint16_t address, uint8_t *send, int send_bytes) |
534 | { | |
535 | int ret; | |
536 | uint8_t msg[20]; | |
537 | int msg_bytes; | |
538 | uint8_t ack; | |
539 | ||
9b984dae | 540 | intel_dp_check_edp(intel_dp); |
a4fc5ed6 KP |
541 | if (send_bytes > 16) |
542 | return -1; | |
543 | msg[0] = AUX_NATIVE_WRITE << 4; | |
544 | msg[1] = address >> 8; | |
eebc863e | 545 | msg[2] = address & 0xff; |
a4fc5ed6 KP |
546 | msg[3] = send_bytes - 1; |
547 | memcpy(&msg[4], send, send_bytes); | |
548 | msg_bytes = send_bytes + 4; | |
549 | for (;;) { | |
ea5b213a | 550 | ret = intel_dp_aux_ch(intel_dp, msg, msg_bytes, &ack, 1); |
a4fc5ed6 KP |
551 | if (ret < 0) |
552 | return ret; | |
553 | if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_ACK) | |
554 | break; | |
555 | else if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_DEFER) | |
556 | udelay(100); | |
557 | else | |
a5b3da54 | 558 | return -EIO; |
a4fc5ed6 KP |
559 | } |
560 | return send_bytes; | |
561 | } | |
562 | ||
563 | /* Write a single byte to the aux channel in native mode */ | |
564 | static int | |
ea5b213a | 565 | intel_dp_aux_native_write_1(struct intel_dp *intel_dp, |
a4fc5ed6 KP |
566 | uint16_t address, uint8_t byte) |
567 | { | |
ea5b213a | 568 | return intel_dp_aux_native_write(intel_dp, address, &byte, 1); |
a4fc5ed6 KP |
569 | } |
570 | ||
571 | /* read bytes from a native aux channel */ | |
572 | static int | |
ea5b213a | 573 | intel_dp_aux_native_read(struct intel_dp *intel_dp, |
a4fc5ed6 KP |
574 | uint16_t address, uint8_t *recv, int recv_bytes) |
575 | { | |
576 | uint8_t msg[4]; | |
577 | int msg_bytes; | |
578 | uint8_t reply[20]; | |
579 | int reply_bytes; | |
580 | uint8_t ack; | |
581 | int ret; | |
582 | ||
9b984dae | 583 | intel_dp_check_edp(intel_dp); |
a4fc5ed6 KP |
584 | msg[0] = AUX_NATIVE_READ << 4; |
585 | msg[1] = address >> 8; | |
586 | msg[2] = address & 0xff; | |
587 | msg[3] = recv_bytes - 1; | |
588 | ||
589 | msg_bytes = 4; | |
590 | reply_bytes = recv_bytes + 1; | |
591 | ||
592 | for (;;) { | |
ea5b213a | 593 | ret = intel_dp_aux_ch(intel_dp, msg, msg_bytes, |
a4fc5ed6 | 594 | reply, reply_bytes); |
a5b3da54 KP |
595 | if (ret == 0) |
596 | return -EPROTO; | |
597 | if (ret < 0) | |
a4fc5ed6 KP |
598 | return ret; |
599 | ack = reply[0]; | |
600 | if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_ACK) { | |
601 | memcpy(recv, reply + 1, ret - 1); | |
602 | return ret - 1; | |
603 | } | |
604 | else if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_DEFER) | |
605 | udelay(100); | |
606 | else | |
a5b3da54 | 607 | return -EIO; |
a4fc5ed6 KP |
608 | } |
609 | } | |
610 | ||
611 | static int | |
ab2c0672 DA |
612 | intel_dp_i2c_aux_ch(struct i2c_adapter *adapter, int mode, |
613 | uint8_t write_byte, uint8_t *read_byte) | |
a4fc5ed6 | 614 | { |
ab2c0672 | 615 | struct i2c_algo_dp_aux_data *algo_data = adapter->algo_data; |
ea5b213a CW |
616 | struct intel_dp *intel_dp = container_of(adapter, |
617 | struct intel_dp, | |
618 | adapter); | |
ab2c0672 DA |
619 | uint16_t address = algo_data->address; |
620 | uint8_t msg[5]; | |
621 | uint8_t reply[2]; | |
8316f337 | 622 | unsigned retry; |
ab2c0672 DA |
623 | int msg_bytes; |
624 | int reply_bytes; | |
625 | int ret; | |
626 | ||
9b984dae | 627 | intel_dp_check_edp(intel_dp); |
ab2c0672 DA |
628 | /* Set up the command byte */ |
629 | if (mode & MODE_I2C_READ) | |
630 | msg[0] = AUX_I2C_READ << 4; | |
631 | else | |
632 | msg[0] = AUX_I2C_WRITE << 4; | |
633 | ||
634 | if (!(mode & MODE_I2C_STOP)) | |
635 | msg[0] |= AUX_I2C_MOT << 4; | |
a4fc5ed6 | 636 | |
ab2c0672 DA |
637 | msg[1] = address >> 8; |
638 | msg[2] = address; | |
639 | ||
640 | switch (mode) { | |
641 | case MODE_I2C_WRITE: | |
642 | msg[3] = 0; | |
643 | msg[4] = write_byte; | |
644 | msg_bytes = 5; | |
645 | reply_bytes = 1; | |
646 | break; | |
647 | case MODE_I2C_READ: | |
648 | msg[3] = 0; | |
649 | msg_bytes = 4; | |
650 | reply_bytes = 2; | |
651 | break; | |
652 | default: | |
653 | msg_bytes = 3; | |
654 | reply_bytes = 1; | |
655 | break; | |
656 | } | |
657 | ||
8316f337 DF |
658 | for (retry = 0; retry < 5; retry++) { |
659 | ret = intel_dp_aux_ch(intel_dp, | |
660 | msg, msg_bytes, | |
661 | reply, reply_bytes); | |
ab2c0672 | 662 | if (ret < 0) { |
3ff99164 | 663 | DRM_DEBUG_KMS("aux_ch failed %d\n", ret); |
ab2c0672 DA |
664 | return ret; |
665 | } | |
8316f337 DF |
666 | |
667 | switch (reply[0] & AUX_NATIVE_REPLY_MASK) { | |
668 | case AUX_NATIVE_REPLY_ACK: | |
669 | /* I2C-over-AUX Reply field is only valid | |
670 | * when paired with AUX ACK. | |
671 | */ | |
672 | break; | |
673 | case AUX_NATIVE_REPLY_NACK: | |
674 | DRM_DEBUG_KMS("aux_ch native nack\n"); | |
675 | return -EREMOTEIO; | |
676 | case AUX_NATIVE_REPLY_DEFER: | |
677 | udelay(100); | |
678 | continue; | |
679 | default: | |
680 | DRM_ERROR("aux_ch invalid native reply 0x%02x\n", | |
681 | reply[0]); | |
682 | return -EREMOTEIO; | |
683 | } | |
684 | ||
ab2c0672 DA |
685 | switch (reply[0] & AUX_I2C_REPLY_MASK) { |
686 | case AUX_I2C_REPLY_ACK: | |
687 | if (mode == MODE_I2C_READ) { | |
688 | *read_byte = reply[1]; | |
689 | } | |
690 | return reply_bytes - 1; | |
691 | case AUX_I2C_REPLY_NACK: | |
8316f337 | 692 | DRM_DEBUG_KMS("aux_i2c nack\n"); |
ab2c0672 DA |
693 | return -EREMOTEIO; |
694 | case AUX_I2C_REPLY_DEFER: | |
8316f337 | 695 | DRM_DEBUG_KMS("aux_i2c defer\n"); |
ab2c0672 DA |
696 | udelay(100); |
697 | break; | |
698 | default: | |
8316f337 | 699 | DRM_ERROR("aux_i2c invalid reply 0x%02x\n", reply[0]); |
ab2c0672 DA |
700 | return -EREMOTEIO; |
701 | } | |
702 | } | |
8316f337 DF |
703 | |
704 | DRM_ERROR("too many retries, giving up\n"); | |
705 | return -EREMOTEIO; | |
a4fc5ed6 KP |
706 | } |
707 | ||
708 | static int | |
ea5b213a | 709 | intel_dp_i2c_init(struct intel_dp *intel_dp, |
55f78c43 | 710 | struct intel_connector *intel_connector, const char *name) |
a4fc5ed6 | 711 | { |
0b5c541b KP |
712 | int ret; |
713 | ||
d54e9d28 | 714 | DRM_DEBUG_KMS("i2c_init %s\n", name); |
ea5b213a CW |
715 | intel_dp->algo.running = false; |
716 | intel_dp->algo.address = 0; | |
717 | intel_dp->algo.aux_ch = intel_dp_i2c_aux_ch; | |
718 | ||
0206e353 | 719 | memset(&intel_dp->adapter, '\0', sizeof(intel_dp->adapter)); |
ea5b213a CW |
720 | intel_dp->adapter.owner = THIS_MODULE; |
721 | intel_dp->adapter.class = I2C_CLASS_DDC; | |
0206e353 | 722 | strncpy(intel_dp->adapter.name, name, sizeof(intel_dp->adapter.name) - 1); |
ea5b213a CW |
723 | intel_dp->adapter.name[sizeof(intel_dp->adapter.name) - 1] = '\0'; |
724 | intel_dp->adapter.algo_data = &intel_dp->algo; | |
725 | intel_dp->adapter.dev.parent = &intel_connector->base.kdev; | |
726 | ||
0b5c541b KP |
727 | ironlake_edp_panel_vdd_on(intel_dp); |
728 | ret = i2c_dp_aux_add_bus(&intel_dp->adapter); | |
bd943159 | 729 | ironlake_edp_panel_vdd_off(intel_dp, false); |
0b5c541b | 730 | return ret; |
a4fc5ed6 KP |
731 | } |
732 | ||
00c09d70 | 733 | bool |
e811f5ae LP |
734 | intel_dp_mode_fixup(struct drm_encoder *encoder, |
735 | const struct drm_display_mode *mode, | |
a4fc5ed6 KP |
736 | struct drm_display_mode *adjusted_mode) |
737 | { | |
0d3a1bee | 738 | struct drm_device *dev = encoder->dev; |
ea5b213a | 739 | struct intel_dp *intel_dp = enc_to_intel_dp(encoder); |
dd06f90e | 740 | struct intel_connector *intel_connector = intel_dp->attached_connector; |
a4fc5ed6 | 741 | int lane_count, clock; |
397fe157 | 742 | int max_lane_count = drm_dp_max_lane_count(intel_dp->dpcd); |
ea5b213a | 743 | int max_clock = intel_dp_max_link_bw(intel_dp) == DP_LINK_BW_2_7 ? 1 : 0; |
083f9560 | 744 | int bpp, mode_rate; |
a4fc5ed6 KP |
745 | static int bws[2] = { DP_LINK_BW_1_62, DP_LINK_BW_2_7 }; |
746 | ||
dd06f90e JN |
747 | if (is_edp(intel_dp) && intel_connector->panel.fixed_mode) { |
748 | intel_fixed_panel_mode(intel_connector->panel.fixed_mode, | |
749 | adjusted_mode); | |
53b41837 YN |
750 | intel_pch_panel_fitting(dev, |
751 | intel_connector->panel.fitting_mode, | |
1d8e1c75 | 752 | mode, adjusted_mode); |
0d3a1bee ZY |
753 | } |
754 | ||
cb1793ce | 755 | if (adjusted_mode->flags & DRM_MODE_FLAG_DBLCLK) |
0af78a2b DV |
756 | return false; |
757 | ||
083f9560 DV |
758 | DRM_DEBUG_KMS("DP link computation with max lane count %i " |
759 | "max bw %02x pixel clock %iKHz\n", | |
71244653 | 760 | max_lane_count, bws[max_clock], adjusted_mode->clock); |
083f9560 | 761 | |
cb1793ce | 762 | if (!intel_dp_adjust_dithering(intel_dp, adjusted_mode, true)) |
c4867936 DV |
763 | return false; |
764 | ||
765 | bpp = adjusted_mode->private_flags & INTEL_MODE_DP_FORCE_6BPC ? 18 : 24; | |
71244653 | 766 | mode_rate = intel_dp_link_required(adjusted_mode->clock, bpp); |
c4867936 | 767 | |
2514bc51 JB |
768 | for (clock = 0; clock <= max_clock; clock++) { |
769 | for (lane_count = 1; lane_count <= max_lane_count; lane_count <<= 1) { | |
9fa5f652 PZ |
770 | int link_bw_clock = |
771 | drm_dp_bw_code_to_link_rate(bws[clock]); | |
772 | int link_avail = intel_dp_max_data_rate(link_bw_clock, | |
773 | lane_count); | |
a4fc5ed6 | 774 | |
083f9560 | 775 | if (mode_rate <= link_avail) { |
ea5b213a CW |
776 | intel_dp->link_bw = bws[clock]; |
777 | intel_dp->lane_count = lane_count; | |
9fa5f652 | 778 | adjusted_mode->clock = link_bw_clock; |
083f9560 DV |
779 | DRM_DEBUG_KMS("DP link bw %02x lane " |
780 | "count %d clock %d bpp %d\n", | |
ea5b213a | 781 | intel_dp->link_bw, intel_dp->lane_count, |
083f9560 DV |
782 | adjusted_mode->clock, bpp); |
783 | DRM_DEBUG_KMS("DP link bw required %i available %i\n", | |
784 | mode_rate, link_avail); | |
a4fc5ed6 KP |
785 | return true; |
786 | } | |
787 | } | |
788 | } | |
fe27d53e | 789 | |
a4fc5ed6 KP |
790 | return false; |
791 | } | |
792 | ||
793 | struct intel_dp_m_n { | |
794 | uint32_t tu; | |
795 | uint32_t gmch_m; | |
796 | uint32_t gmch_n; | |
797 | uint32_t link_m; | |
798 | uint32_t link_n; | |
799 | }; | |
800 | ||
801 | static void | |
802 | intel_reduce_ratio(uint32_t *num, uint32_t *den) | |
803 | { | |
804 | while (*num > 0xffffff || *den > 0xffffff) { | |
805 | *num >>= 1; | |
806 | *den >>= 1; | |
807 | } | |
808 | } | |
809 | ||
810 | static void | |
36e83a18 | 811 | intel_dp_compute_m_n(int bpp, |
a4fc5ed6 KP |
812 | int nlanes, |
813 | int pixel_clock, | |
814 | int link_clock, | |
815 | struct intel_dp_m_n *m_n) | |
816 | { | |
817 | m_n->tu = 64; | |
36e83a18 | 818 | m_n->gmch_m = (pixel_clock * bpp) >> 3; |
a4fc5ed6 KP |
819 | m_n->gmch_n = link_clock * nlanes; |
820 | intel_reduce_ratio(&m_n->gmch_m, &m_n->gmch_n); | |
821 | m_n->link_m = pixel_clock; | |
822 | m_n->link_n = link_clock; | |
823 | intel_reduce_ratio(&m_n->link_m, &m_n->link_n); | |
824 | } | |
825 | ||
826 | void | |
827 | intel_dp_set_m_n(struct drm_crtc *crtc, struct drm_display_mode *mode, | |
828 | struct drm_display_mode *adjusted_mode) | |
829 | { | |
830 | struct drm_device *dev = crtc->dev; | |
fa90ecef PZ |
831 | struct intel_encoder *intel_encoder; |
832 | struct intel_dp *intel_dp; | |
a4fc5ed6 KP |
833 | struct drm_i915_private *dev_priv = dev->dev_private; |
834 | struct intel_crtc *intel_crtc = to_intel_crtc(crtc); | |
858fa035 | 835 | int lane_count = 4; |
a4fc5ed6 | 836 | struct intel_dp_m_n m_n; |
9db4a9c7 | 837 | int pipe = intel_crtc->pipe; |
afe2fcf5 | 838 | enum transcoder cpu_transcoder = intel_crtc->cpu_transcoder; |
a4fc5ed6 KP |
839 | |
840 | /* | |
21d40d37 | 841 | * Find the lane count in the intel_encoder private |
a4fc5ed6 | 842 | */ |
fa90ecef PZ |
843 | for_each_encoder_on_crtc(dev, crtc, intel_encoder) { |
844 | intel_dp = enc_to_intel_dp(&intel_encoder->base); | |
a4fc5ed6 | 845 | |
fa90ecef PZ |
846 | if (intel_encoder->type == INTEL_OUTPUT_DISPLAYPORT || |
847 | intel_encoder->type == INTEL_OUTPUT_EDP) | |
9a10f401 | 848 | { |
ea5b213a | 849 | lane_count = intel_dp->lane_count; |
51190667 | 850 | break; |
a4fc5ed6 KP |
851 | } |
852 | } | |
853 | ||
854 | /* | |
855 | * Compute the GMCH and Link ratios. The '3' here is | |
856 | * the number of bytes_per_pixel post-LUT, which we always | |
857 | * set up for 8-bits of R/G/B, or 3 bytes total. | |
858 | */ | |
858fa035 | 859 | intel_dp_compute_m_n(intel_crtc->bpp, lane_count, |
a4fc5ed6 KP |
860 | mode->clock, adjusted_mode->clock, &m_n); |
861 | ||
1eb8dfec | 862 | if (IS_HASWELL(dev)) { |
afe2fcf5 PZ |
863 | I915_WRITE(PIPE_DATA_M1(cpu_transcoder), |
864 | TU_SIZE(m_n.tu) | m_n.gmch_m); | |
865 | I915_WRITE(PIPE_DATA_N1(cpu_transcoder), m_n.gmch_n); | |
866 | I915_WRITE(PIPE_LINK_M1(cpu_transcoder), m_n.link_m); | |
867 | I915_WRITE(PIPE_LINK_N1(cpu_transcoder), m_n.link_n); | |
1eb8dfec | 868 | } else if (HAS_PCH_SPLIT(dev)) { |
7346bfa0 | 869 | I915_WRITE(TRANSDATA_M1(pipe), TU_SIZE(m_n.tu) | m_n.gmch_m); |
9db4a9c7 JB |
870 | I915_WRITE(TRANSDATA_N1(pipe), m_n.gmch_n); |
871 | I915_WRITE(TRANSDPLINK_M1(pipe), m_n.link_m); | |
872 | I915_WRITE(TRANSDPLINK_N1(pipe), m_n.link_n); | |
74a4dd2e VP |
873 | } else if (IS_VALLEYVIEW(dev)) { |
874 | I915_WRITE(PIPE_DATA_M1(pipe), TU_SIZE(m_n.tu) | m_n.gmch_m); | |
875 | I915_WRITE(PIPE_DATA_N1(pipe), m_n.gmch_n); | |
876 | I915_WRITE(PIPE_LINK_M1(pipe), m_n.link_m); | |
877 | I915_WRITE(PIPE_LINK_N1(pipe), m_n.link_n); | |
a4fc5ed6 | 878 | } else { |
9db4a9c7 | 879 | I915_WRITE(PIPE_GMCH_DATA_M(pipe), |
7346bfa0 | 880 | TU_SIZE(m_n.tu) | m_n.gmch_m); |
9db4a9c7 JB |
881 | I915_WRITE(PIPE_GMCH_DATA_N(pipe), m_n.gmch_n); |
882 | I915_WRITE(PIPE_DP_LINK_M(pipe), m_n.link_m); | |
883 | I915_WRITE(PIPE_DP_LINK_N(pipe), m_n.link_n); | |
a4fc5ed6 KP |
884 | } |
885 | } | |
886 | ||
247d89f6 PZ |
887 | void intel_dp_init_link_config(struct intel_dp *intel_dp) |
888 | { | |
889 | memset(intel_dp->link_configuration, 0, DP_LINK_CONFIGURATION_SIZE); | |
890 | intel_dp->link_configuration[0] = intel_dp->link_bw; | |
891 | intel_dp->link_configuration[1] = intel_dp->lane_count; | |
892 | intel_dp->link_configuration[8] = DP_SET_ANSI_8B10B; | |
893 | /* | |
894 | * Check for DPCD version > 1.1 and enhanced framing support | |
895 | */ | |
896 | if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11 && | |
897 | (intel_dp->dpcd[DP_MAX_LANE_COUNT] & DP_ENHANCED_FRAME_CAP)) { | |
898 | intel_dp->link_configuration[1] |= DP_LANE_COUNT_ENHANCED_FRAME_EN; | |
899 | } | |
900 | } | |
901 | ||
a4fc5ed6 KP |
902 | static void |
903 | intel_dp_mode_set(struct drm_encoder *encoder, struct drm_display_mode *mode, | |
904 | struct drm_display_mode *adjusted_mode) | |
905 | { | |
e3421a18 | 906 | struct drm_device *dev = encoder->dev; |
417e822d | 907 | struct drm_i915_private *dev_priv = dev->dev_private; |
ea5b213a | 908 | struct intel_dp *intel_dp = enc_to_intel_dp(encoder); |
fa90ecef | 909 | struct drm_crtc *crtc = encoder->crtc; |
a4fc5ed6 KP |
910 | struct intel_crtc *intel_crtc = to_intel_crtc(crtc); |
911 | ||
417e822d | 912 | /* |
1a2eb460 | 913 | * There are four kinds of DP registers: |
417e822d KP |
914 | * |
915 | * IBX PCH | |
1a2eb460 KP |
916 | * SNB CPU |
917 | * IVB CPU | |
417e822d KP |
918 | * CPT PCH |
919 | * | |
920 | * IBX PCH and CPU are the same for almost everything, | |
921 | * except that the CPU DP PLL is configured in this | |
922 | * register | |
923 | * | |
924 | * CPT PCH is quite different, having many bits moved | |
925 | * to the TRANS_DP_CTL register instead. That | |
926 | * configuration happens (oddly) in ironlake_pch_enable | |
927 | */ | |
9c9e7927 | 928 | |
417e822d KP |
929 | /* Preserve the BIOS-computed detected bit. This is |
930 | * supposed to be read-only. | |
931 | */ | |
932 | intel_dp->DP = I915_READ(intel_dp->output_reg) & DP_DETECTED; | |
a4fc5ed6 | 933 | |
417e822d | 934 | /* Handle DP bits in common between all three register formats */ |
417e822d | 935 | intel_dp->DP |= DP_VOLTAGE_0_4 | DP_PRE_EMPHASIS_0; |
a4fc5ed6 | 936 | |
ea5b213a | 937 | switch (intel_dp->lane_count) { |
a4fc5ed6 | 938 | case 1: |
ea5b213a | 939 | intel_dp->DP |= DP_PORT_WIDTH_1; |
a4fc5ed6 KP |
940 | break; |
941 | case 2: | |
ea5b213a | 942 | intel_dp->DP |= DP_PORT_WIDTH_2; |
a4fc5ed6 KP |
943 | break; |
944 | case 4: | |
ea5b213a | 945 | intel_dp->DP |= DP_PORT_WIDTH_4; |
a4fc5ed6 KP |
946 | break; |
947 | } | |
e0dac65e WF |
948 | if (intel_dp->has_audio) { |
949 | DRM_DEBUG_DRIVER("Enabling DP audio on pipe %c\n", | |
950 | pipe_name(intel_crtc->pipe)); | |
ea5b213a | 951 | intel_dp->DP |= DP_AUDIO_OUTPUT_ENABLE; |
e0dac65e WF |
952 | intel_write_eld(encoder, adjusted_mode); |
953 | } | |
247d89f6 PZ |
954 | |
955 | intel_dp_init_link_config(intel_dp); | |
a4fc5ed6 | 956 | |
417e822d | 957 | /* Split out the IBX/CPU vs CPT settings */ |
32f9d658 | 958 | |
19c03924 | 959 | if (is_cpu_edp(intel_dp) && IS_GEN7(dev) && !IS_VALLEYVIEW(dev)) { |
1a2eb460 KP |
960 | if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC) |
961 | intel_dp->DP |= DP_SYNC_HS_HIGH; | |
962 | if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC) | |
963 | intel_dp->DP |= DP_SYNC_VS_HIGH; | |
964 | intel_dp->DP |= DP_LINK_TRAIN_OFF_CPT; | |
965 | ||
966 | if (intel_dp->link_configuration[1] & DP_LANE_COUNT_ENHANCED_FRAME_EN) | |
967 | intel_dp->DP |= DP_ENHANCED_FRAMING; | |
968 | ||
969 | intel_dp->DP |= intel_crtc->pipe << 29; | |
970 | ||
971 | /* don't miss out required setting for eDP */ | |
1a2eb460 KP |
972 | if (adjusted_mode->clock < 200000) |
973 | intel_dp->DP |= DP_PLL_FREQ_160MHZ; | |
974 | else | |
975 | intel_dp->DP |= DP_PLL_FREQ_270MHZ; | |
976 | } else if (!HAS_PCH_CPT(dev) || is_cpu_edp(intel_dp)) { | |
417e822d KP |
977 | intel_dp->DP |= intel_dp->color_range; |
978 | ||
979 | if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC) | |
980 | intel_dp->DP |= DP_SYNC_HS_HIGH; | |
981 | if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC) | |
982 | intel_dp->DP |= DP_SYNC_VS_HIGH; | |
983 | intel_dp->DP |= DP_LINK_TRAIN_OFF; | |
984 | ||
985 | if (intel_dp->link_configuration[1] & DP_LANE_COUNT_ENHANCED_FRAME_EN) | |
986 | intel_dp->DP |= DP_ENHANCED_FRAMING; | |
987 | ||
988 | if (intel_crtc->pipe == 1) | |
989 | intel_dp->DP |= DP_PIPEB_SELECT; | |
990 | ||
991 | if (is_cpu_edp(intel_dp)) { | |
992 | /* don't miss out required setting for eDP */ | |
417e822d KP |
993 | if (adjusted_mode->clock < 200000) |
994 | intel_dp->DP |= DP_PLL_FREQ_160MHZ; | |
995 | else | |
996 | intel_dp->DP |= DP_PLL_FREQ_270MHZ; | |
997 | } | |
998 | } else { | |
999 | intel_dp->DP |= DP_LINK_TRAIN_OFF_CPT; | |
32f9d658 | 1000 | } |
a4fc5ed6 KP |
1001 | } |
1002 | ||
99ea7127 KP |
1003 | #define IDLE_ON_MASK (PP_ON | 0 | PP_SEQUENCE_MASK | 0 | PP_SEQUENCE_STATE_MASK) |
1004 | #define IDLE_ON_VALUE (PP_ON | 0 | PP_SEQUENCE_NONE | 0 | PP_SEQUENCE_STATE_ON_IDLE) | |
1005 | ||
1006 | #define IDLE_OFF_MASK (PP_ON | 0 | PP_SEQUENCE_MASK | 0 | PP_SEQUENCE_STATE_MASK) | |
1007 | #define IDLE_OFF_VALUE (0 | 0 | PP_SEQUENCE_NONE | 0 | PP_SEQUENCE_STATE_OFF_IDLE) | |
1008 | ||
1009 | #define IDLE_CYCLE_MASK (PP_ON | 0 | PP_SEQUENCE_MASK | PP_CYCLE_DELAY_ACTIVE | PP_SEQUENCE_STATE_MASK) | |
1010 | #define IDLE_CYCLE_VALUE (0 | 0 | PP_SEQUENCE_NONE | 0 | PP_SEQUENCE_STATE_OFF_IDLE) | |
1011 | ||
1012 | static void ironlake_wait_panel_status(struct intel_dp *intel_dp, | |
1013 | u32 mask, | |
1014 | u32 value) | |
bd943159 | 1015 | { |
30add22d | 1016 | struct drm_device *dev = intel_dp_to_dev(intel_dp); |
99ea7127 | 1017 | struct drm_i915_private *dev_priv = dev->dev_private; |
32ce697c | 1018 | |
99ea7127 KP |
1019 | DRM_DEBUG_KMS("mask %08x value %08x status %08x control %08x\n", |
1020 | mask, value, | |
1021 | I915_READ(PCH_PP_STATUS), | |
1022 | I915_READ(PCH_PP_CONTROL)); | |
32ce697c | 1023 | |
99ea7127 KP |
1024 | if (_wait_for((I915_READ(PCH_PP_STATUS) & mask) == value, 5000, 10)) { |
1025 | DRM_ERROR("Panel status timeout: status %08x control %08x\n", | |
1026 | I915_READ(PCH_PP_STATUS), | |
1027 | I915_READ(PCH_PP_CONTROL)); | |
32ce697c | 1028 | } |
99ea7127 | 1029 | } |
32ce697c | 1030 | |
99ea7127 KP |
1031 | static void ironlake_wait_panel_on(struct intel_dp *intel_dp) |
1032 | { | |
1033 | DRM_DEBUG_KMS("Wait for panel power on\n"); | |
1034 | ironlake_wait_panel_status(intel_dp, IDLE_ON_MASK, IDLE_ON_VALUE); | |
bd943159 KP |
1035 | } |
1036 | ||
99ea7127 KP |
1037 | static void ironlake_wait_panel_off(struct intel_dp *intel_dp) |
1038 | { | |
1039 | DRM_DEBUG_KMS("Wait for panel power off time\n"); | |
1040 | ironlake_wait_panel_status(intel_dp, IDLE_OFF_MASK, IDLE_OFF_VALUE); | |
1041 | } | |
1042 | ||
1043 | static void ironlake_wait_panel_power_cycle(struct intel_dp *intel_dp) | |
1044 | { | |
1045 | DRM_DEBUG_KMS("Wait for panel power cycle\n"); | |
1046 | ironlake_wait_panel_status(intel_dp, IDLE_CYCLE_MASK, IDLE_CYCLE_VALUE); | |
1047 | } | |
1048 | ||
1049 | ||
832dd3c1 KP |
1050 | /* Read the current pp_control value, unlocking the register if it |
1051 | * is locked | |
1052 | */ | |
1053 | ||
1054 | static u32 ironlake_get_pp_control(struct drm_i915_private *dev_priv) | |
1055 | { | |
1056 | u32 control = I915_READ(PCH_PP_CONTROL); | |
1057 | ||
1058 | control &= ~PANEL_UNLOCK_MASK; | |
1059 | control |= PANEL_UNLOCK_REGS; | |
1060 | return control; | |
bd943159 KP |
1061 | } |
1062 | ||
82a4d9c0 | 1063 | void ironlake_edp_panel_vdd_on(struct intel_dp *intel_dp) |
5d613501 | 1064 | { |
30add22d | 1065 | struct drm_device *dev = intel_dp_to_dev(intel_dp); |
5d613501 JB |
1066 | struct drm_i915_private *dev_priv = dev->dev_private; |
1067 | u32 pp; | |
1068 | ||
97af61f5 KP |
1069 | if (!is_edp(intel_dp)) |
1070 | return; | |
f01eca2e | 1071 | DRM_DEBUG_KMS("Turn eDP VDD on\n"); |
5d613501 | 1072 | |
bd943159 KP |
1073 | WARN(intel_dp->want_panel_vdd, |
1074 | "eDP VDD already requested on\n"); | |
1075 | ||
1076 | intel_dp->want_panel_vdd = true; | |
99ea7127 | 1077 | |
bd943159 KP |
1078 | if (ironlake_edp_have_panel_vdd(intel_dp)) { |
1079 | DRM_DEBUG_KMS("eDP VDD already on\n"); | |
1080 | return; | |
1081 | } | |
1082 | ||
99ea7127 KP |
1083 | if (!ironlake_edp_have_panel_power(intel_dp)) |
1084 | ironlake_wait_panel_power_cycle(intel_dp); | |
1085 | ||
832dd3c1 | 1086 | pp = ironlake_get_pp_control(dev_priv); |
5d613501 JB |
1087 | pp |= EDP_FORCE_VDD; |
1088 | I915_WRITE(PCH_PP_CONTROL, pp); | |
1089 | POSTING_READ(PCH_PP_CONTROL); | |
f01eca2e KP |
1090 | DRM_DEBUG_KMS("PCH_PP_STATUS: 0x%08x PCH_PP_CONTROL: 0x%08x\n", |
1091 | I915_READ(PCH_PP_STATUS), I915_READ(PCH_PP_CONTROL)); | |
ebf33b18 KP |
1092 | |
1093 | /* | |
1094 | * If the panel wasn't on, delay before accessing aux channel | |
1095 | */ | |
1096 | if (!ironlake_edp_have_panel_power(intel_dp)) { | |
bd943159 | 1097 | DRM_DEBUG_KMS("eDP was not running\n"); |
f01eca2e | 1098 | msleep(intel_dp->panel_power_up_delay); |
f01eca2e | 1099 | } |
5d613501 JB |
1100 | } |
1101 | ||
bd943159 | 1102 | static void ironlake_panel_vdd_off_sync(struct intel_dp *intel_dp) |
5d613501 | 1103 | { |
30add22d | 1104 | struct drm_device *dev = intel_dp_to_dev(intel_dp); |
5d613501 JB |
1105 | struct drm_i915_private *dev_priv = dev->dev_private; |
1106 | u32 pp; | |
1107 | ||
bd943159 | 1108 | if (!intel_dp->want_panel_vdd && ironlake_edp_have_panel_vdd(intel_dp)) { |
832dd3c1 | 1109 | pp = ironlake_get_pp_control(dev_priv); |
bd943159 KP |
1110 | pp &= ~EDP_FORCE_VDD; |
1111 | I915_WRITE(PCH_PP_CONTROL, pp); | |
1112 | POSTING_READ(PCH_PP_CONTROL); | |
1113 | ||
1114 | /* Make sure sequencer is idle before allowing subsequent activity */ | |
1115 | DRM_DEBUG_KMS("PCH_PP_STATUS: 0x%08x PCH_PP_CONTROL: 0x%08x\n", | |
1116 | I915_READ(PCH_PP_STATUS), I915_READ(PCH_PP_CONTROL)); | |
99ea7127 KP |
1117 | |
1118 | msleep(intel_dp->panel_power_down_delay); | |
bd943159 KP |
1119 | } |
1120 | } | |
5d613501 | 1121 | |
bd943159 KP |
1122 | static void ironlake_panel_vdd_work(struct work_struct *__work) |
1123 | { | |
1124 | struct intel_dp *intel_dp = container_of(to_delayed_work(__work), | |
1125 | struct intel_dp, panel_vdd_work); | |
30add22d | 1126 | struct drm_device *dev = intel_dp_to_dev(intel_dp); |
bd943159 | 1127 | |
627f7675 | 1128 | mutex_lock(&dev->mode_config.mutex); |
bd943159 | 1129 | ironlake_panel_vdd_off_sync(intel_dp); |
627f7675 | 1130 | mutex_unlock(&dev->mode_config.mutex); |
bd943159 KP |
1131 | } |
1132 | ||
82a4d9c0 | 1133 | void ironlake_edp_panel_vdd_off(struct intel_dp *intel_dp, bool sync) |
bd943159 | 1134 | { |
97af61f5 KP |
1135 | if (!is_edp(intel_dp)) |
1136 | return; | |
5d613501 | 1137 | |
bd943159 KP |
1138 | DRM_DEBUG_KMS("Turn eDP VDD off %d\n", intel_dp->want_panel_vdd); |
1139 | WARN(!intel_dp->want_panel_vdd, "eDP VDD not forced on"); | |
f2e8b18a | 1140 | |
bd943159 KP |
1141 | intel_dp->want_panel_vdd = false; |
1142 | ||
1143 | if (sync) { | |
1144 | ironlake_panel_vdd_off_sync(intel_dp); | |
1145 | } else { | |
1146 | /* | |
1147 | * Queue the timer to fire a long | |
1148 | * time from now (relative to the power down delay) | |
1149 | * to keep the panel power up across a sequence of operations | |
1150 | */ | |
1151 | schedule_delayed_work(&intel_dp->panel_vdd_work, | |
1152 | msecs_to_jiffies(intel_dp->panel_power_cycle_delay * 5)); | |
1153 | } | |
5d613501 JB |
1154 | } |
1155 | ||
82a4d9c0 | 1156 | void ironlake_edp_panel_on(struct intel_dp *intel_dp) |
9934c132 | 1157 | { |
30add22d | 1158 | struct drm_device *dev = intel_dp_to_dev(intel_dp); |
9934c132 | 1159 | struct drm_i915_private *dev_priv = dev->dev_private; |
99ea7127 | 1160 | u32 pp; |
9934c132 | 1161 | |
97af61f5 | 1162 | if (!is_edp(intel_dp)) |
bd943159 | 1163 | return; |
99ea7127 KP |
1164 | |
1165 | DRM_DEBUG_KMS("Turn eDP power on\n"); | |
1166 | ||
1167 | if (ironlake_edp_have_panel_power(intel_dp)) { | |
1168 | DRM_DEBUG_KMS("eDP power already on\n"); | |
7d639f35 | 1169 | return; |
99ea7127 | 1170 | } |
9934c132 | 1171 | |
99ea7127 | 1172 | ironlake_wait_panel_power_cycle(intel_dp); |
37c6c9b0 | 1173 | |
99ea7127 | 1174 | pp = ironlake_get_pp_control(dev_priv); |
05ce1a49 KP |
1175 | if (IS_GEN5(dev)) { |
1176 | /* ILK workaround: disable reset around power sequence */ | |
1177 | pp &= ~PANEL_POWER_RESET; | |
1178 | I915_WRITE(PCH_PP_CONTROL, pp); | |
1179 | POSTING_READ(PCH_PP_CONTROL); | |
1180 | } | |
37c6c9b0 | 1181 | |
1c0ae80a | 1182 | pp |= POWER_TARGET_ON; |
99ea7127 KP |
1183 | if (!IS_GEN5(dev)) |
1184 | pp |= PANEL_POWER_RESET; | |
1185 | ||
9934c132 | 1186 | I915_WRITE(PCH_PP_CONTROL, pp); |
01cb9ea6 | 1187 | POSTING_READ(PCH_PP_CONTROL); |
9934c132 | 1188 | |
99ea7127 | 1189 | ironlake_wait_panel_on(intel_dp); |
9934c132 | 1190 | |
05ce1a49 KP |
1191 | if (IS_GEN5(dev)) { |
1192 | pp |= PANEL_POWER_RESET; /* restore panel reset bit */ | |
1193 | I915_WRITE(PCH_PP_CONTROL, pp); | |
1194 | POSTING_READ(PCH_PP_CONTROL); | |
1195 | } | |
9934c132 JB |
1196 | } |
1197 | ||
82a4d9c0 | 1198 | void ironlake_edp_panel_off(struct intel_dp *intel_dp) |
9934c132 | 1199 | { |
30add22d | 1200 | struct drm_device *dev = intel_dp_to_dev(intel_dp); |
9934c132 | 1201 | struct drm_i915_private *dev_priv = dev->dev_private; |
99ea7127 | 1202 | u32 pp; |
9934c132 | 1203 | |
97af61f5 KP |
1204 | if (!is_edp(intel_dp)) |
1205 | return; | |
37c6c9b0 | 1206 | |
99ea7127 | 1207 | DRM_DEBUG_KMS("Turn eDP power off\n"); |
37c6c9b0 | 1208 | |
6cb49835 | 1209 | WARN(!intel_dp->want_panel_vdd, "Need VDD to turn off panel\n"); |
37c6c9b0 | 1210 | |
99ea7127 | 1211 | pp = ironlake_get_pp_control(dev_priv); |
35a38556 DV |
1212 | /* We need to switch off panel power _and_ force vdd, for otherwise some |
1213 | * panels get very unhappy and cease to work. */ | |
1214 | pp &= ~(POWER_TARGET_ON | EDP_FORCE_VDD | PANEL_POWER_RESET | EDP_BLC_ENABLE); | |
99ea7127 KP |
1215 | I915_WRITE(PCH_PP_CONTROL, pp); |
1216 | POSTING_READ(PCH_PP_CONTROL); | |
9934c132 | 1217 | |
35a38556 DV |
1218 | intel_dp->want_panel_vdd = false; |
1219 | ||
99ea7127 | 1220 | ironlake_wait_panel_off(intel_dp); |
9934c132 JB |
1221 | } |
1222 | ||
d6c50ff8 | 1223 | void ironlake_edp_backlight_on(struct intel_dp *intel_dp) |
32f9d658 | 1224 | { |
da63a9f2 PZ |
1225 | struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp); |
1226 | struct drm_device *dev = intel_dig_port->base.base.dev; | |
32f9d658 | 1227 | struct drm_i915_private *dev_priv = dev->dev_private; |
da63a9f2 | 1228 | int pipe = to_intel_crtc(intel_dig_port->base.base.crtc)->pipe; |
32f9d658 ZW |
1229 | u32 pp; |
1230 | ||
f01eca2e KP |
1231 | if (!is_edp(intel_dp)) |
1232 | return; | |
1233 | ||
28c97730 | 1234 | DRM_DEBUG_KMS("\n"); |
01cb9ea6 JB |
1235 | /* |
1236 | * If we enable the backlight right away following a panel power | |
1237 | * on, we may see slight flicker as the panel syncs with the eDP | |
1238 | * link. So delay a bit to make sure the image is solid before | |
1239 | * allowing it to appear. | |
1240 | */ | |
f01eca2e | 1241 | msleep(intel_dp->backlight_on_delay); |
832dd3c1 | 1242 | pp = ironlake_get_pp_control(dev_priv); |
32f9d658 ZW |
1243 | pp |= EDP_BLC_ENABLE; |
1244 | I915_WRITE(PCH_PP_CONTROL, pp); | |
f01eca2e | 1245 | POSTING_READ(PCH_PP_CONTROL); |
035aa3de DV |
1246 | |
1247 | intel_panel_enable_backlight(dev, pipe); | |
32f9d658 ZW |
1248 | } |
1249 | ||
d6c50ff8 | 1250 | void ironlake_edp_backlight_off(struct intel_dp *intel_dp) |
32f9d658 | 1251 | { |
30add22d | 1252 | struct drm_device *dev = intel_dp_to_dev(intel_dp); |
32f9d658 ZW |
1253 | struct drm_i915_private *dev_priv = dev->dev_private; |
1254 | u32 pp; | |
1255 | ||
f01eca2e KP |
1256 | if (!is_edp(intel_dp)) |
1257 | return; | |
1258 | ||
035aa3de DV |
1259 | intel_panel_disable_backlight(dev); |
1260 | ||
28c97730 | 1261 | DRM_DEBUG_KMS("\n"); |
832dd3c1 | 1262 | pp = ironlake_get_pp_control(dev_priv); |
32f9d658 ZW |
1263 | pp &= ~EDP_BLC_ENABLE; |
1264 | I915_WRITE(PCH_PP_CONTROL, pp); | |
f01eca2e KP |
1265 | POSTING_READ(PCH_PP_CONTROL); |
1266 | msleep(intel_dp->backlight_off_delay); | |
32f9d658 | 1267 | } |
a4fc5ed6 | 1268 | |
2bd2ad64 | 1269 | static void ironlake_edp_pll_on(struct intel_dp *intel_dp) |
d240f20f | 1270 | { |
da63a9f2 PZ |
1271 | struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp); |
1272 | struct drm_crtc *crtc = intel_dig_port->base.base.crtc; | |
1273 | struct drm_device *dev = crtc->dev; | |
d240f20f JB |
1274 | struct drm_i915_private *dev_priv = dev->dev_private; |
1275 | u32 dpa_ctl; | |
1276 | ||
2bd2ad64 DV |
1277 | assert_pipe_disabled(dev_priv, |
1278 | to_intel_crtc(crtc)->pipe); | |
1279 | ||
d240f20f JB |
1280 | DRM_DEBUG_KMS("\n"); |
1281 | dpa_ctl = I915_READ(DP_A); | |
0767935e DV |
1282 | WARN(dpa_ctl & DP_PLL_ENABLE, "dp pll on, should be off\n"); |
1283 | WARN(dpa_ctl & DP_PORT_EN, "dp port still on, should be off\n"); | |
1284 | ||
1285 | /* We don't adjust intel_dp->DP while tearing down the link, to | |
1286 | * facilitate link retraining (e.g. after hotplug). Hence clear all | |
1287 | * enable bits here to ensure that we don't enable too much. */ | |
1288 | intel_dp->DP &= ~(DP_PORT_EN | DP_AUDIO_OUTPUT_ENABLE); | |
1289 | intel_dp->DP |= DP_PLL_ENABLE; | |
1290 | I915_WRITE(DP_A, intel_dp->DP); | |
298b0b39 JB |
1291 | POSTING_READ(DP_A); |
1292 | udelay(200); | |
d240f20f JB |
1293 | } |
1294 | ||
2bd2ad64 | 1295 | static void ironlake_edp_pll_off(struct intel_dp *intel_dp) |
d240f20f | 1296 | { |
da63a9f2 PZ |
1297 | struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp); |
1298 | struct drm_crtc *crtc = intel_dig_port->base.base.crtc; | |
1299 | struct drm_device *dev = crtc->dev; | |
d240f20f JB |
1300 | struct drm_i915_private *dev_priv = dev->dev_private; |
1301 | u32 dpa_ctl; | |
1302 | ||
2bd2ad64 DV |
1303 | assert_pipe_disabled(dev_priv, |
1304 | to_intel_crtc(crtc)->pipe); | |
1305 | ||
d240f20f | 1306 | dpa_ctl = I915_READ(DP_A); |
0767935e DV |
1307 | WARN((dpa_ctl & DP_PLL_ENABLE) == 0, |
1308 | "dp pll off, should be on\n"); | |
1309 | WARN(dpa_ctl & DP_PORT_EN, "dp port still on, should be off\n"); | |
1310 | ||
1311 | /* We can't rely on the value tracked for the DP register in | |
1312 | * intel_dp->DP because link_down must not change that (otherwise link | |
1313 | * re-training will fail. */ | |
298b0b39 | 1314 | dpa_ctl &= ~DP_PLL_ENABLE; |
d240f20f | 1315 | I915_WRITE(DP_A, dpa_ctl); |
1af5fa1b | 1316 | POSTING_READ(DP_A); |
d240f20f JB |
1317 | udelay(200); |
1318 | } | |
1319 | ||
c7ad3810 | 1320 | /* If the sink supports it, try to set the power state appropriately */ |
c19b0669 | 1321 | void intel_dp_sink_dpms(struct intel_dp *intel_dp, int mode) |
c7ad3810 JB |
1322 | { |
1323 | int ret, i; | |
1324 | ||
1325 | /* Should have a valid DPCD by this point */ | |
1326 | if (intel_dp->dpcd[DP_DPCD_REV] < 0x11) | |
1327 | return; | |
1328 | ||
1329 | if (mode != DRM_MODE_DPMS_ON) { | |
1330 | ret = intel_dp_aux_native_write_1(intel_dp, DP_SET_POWER, | |
1331 | DP_SET_POWER_D3); | |
1332 | if (ret != 1) | |
1333 | DRM_DEBUG_DRIVER("failed to write sink power state\n"); | |
1334 | } else { | |
1335 | /* | |
1336 | * When turning on, we need to retry for 1ms to give the sink | |
1337 | * time to wake up. | |
1338 | */ | |
1339 | for (i = 0; i < 3; i++) { | |
1340 | ret = intel_dp_aux_native_write_1(intel_dp, | |
1341 | DP_SET_POWER, | |
1342 | DP_SET_POWER_D0); | |
1343 | if (ret == 1) | |
1344 | break; | |
1345 | msleep(1); | |
1346 | } | |
1347 | } | |
1348 | } | |
1349 | ||
19d8fe15 DV |
1350 | static bool intel_dp_get_hw_state(struct intel_encoder *encoder, |
1351 | enum pipe *pipe) | |
d240f20f | 1352 | { |
19d8fe15 DV |
1353 | struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base); |
1354 | struct drm_device *dev = encoder->base.dev; | |
1355 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1356 | u32 tmp = I915_READ(intel_dp->output_reg); | |
1357 | ||
1358 | if (!(tmp & DP_PORT_EN)) | |
1359 | return false; | |
1360 | ||
1361 | if (is_cpu_edp(intel_dp) && IS_GEN7(dev)) { | |
1362 | *pipe = PORT_TO_PIPE_CPT(tmp); | |
1363 | } else if (!HAS_PCH_CPT(dev) || is_cpu_edp(intel_dp)) { | |
1364 | *pipe = PORT_TO_PIPE(tmp); | |
1365 | } else { | |
1366 | u32 trans_sel; | |
1367 | u32 trans_dp; | |
1368 | int i; | |
1369 | ||
1370 | switch (intel_dp->output_reg) { | |
1371 | case PCH_DP_B: | |
1372 | trans_sel = TRANS_DP_PORT_SEL_B; | |
1373 | break; | |
1374 | case PCH_DP_C: | |
1375 | trans_sel = TRANS_DP_PORT_SEL_C; | |
1376 | break; | |
1377 | case PCH_DP_D: | |
1378 | trans_sel = TRANS_DP_PORT_SEL_D; | |
1379 | break; | |
1380 | default: | |
1381 | return true; | |
1382 | } | |
1383 | ||
1384 | for_each_pipe(i) { | |
1385 | trans_dp = I915_READ(TRANS_DP_CTL(i)); | |
1386 | if ((trans_dp & TRANS_DP_PORT_SEL_MASK) == trans_sel) { | |
1387 | *pipe = i; | |
1388 | return true; | |
1389 | } | |
1390 | } | |
19d8fe15 | 1391 | |
4a0833ec DV |
1392 | DRM_DEBUG_KMS("No pipe for dp port 0x%x found\n", |
1393 | intel_dp->output_reg); | |
1394 | } | |
d240f20f | 1395 | |
19d8fe15 DV |
1396 | return true; |
1397 | } | |
d240f20f | 1398 | |
e8cb4558 | 1399 | static void intel_disable_dp(struct intel_encoder *encoder) |
d240f20f | 1400 | { |
e8cb4558 | 1401 | struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base); |
6cb49835 DV |
1402 | |
1403 | /* Make sure the panel is off before trying to change the mode. But also | |
1404 | * ensure that we have vdd while we switch off the panel. */ | |
1405 | ironlake_edp_panel_vdd_on(intel_dp); | |
21264c63 | 1406 | ironlake_edp_backlight_off(intel_dp); |
c7ad3810 | 1407 | intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON); |
35a38556 | 1408 | ironlake_edp_panel_off(intel_dp); |
3739850b DV |
1409 | |
1410 | /* cpu edp my only be disable _after_ the cpu pipe/plane is disabled. */ | |
1411 | if (!is_cpu_edp(intel_dp)) | |
1412 | intel_dp_link_down(intel_dp); | |
d240f20f JB |
1413 | } |
1414 | ||
2bd2ad64 | 1415 | static void intel_post_disable_dp(struct intel_encoder *encoder) |
d240f20f | 1416 | { |
2bd2ad64 DV |
1417 | struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base); |
1418 | ||
3739850b DV |
1419 | if (is_cpu_edp(intel_dp)) { |
1420 | intel_dp_link_down(intel_dp); | |
2bd2ad64 | 1421 | ironlake_edp_pll_off(intel_dp); |
3739850b | 1422 | } |
2bd2ad64 DV |
1423 | } |
1424 | ||
e8cb4558 | 1425 | static void intel_enable_dp(struct intel_encoder *encoder) |
d240f20f | 1426 | { |
e8cb4558 DV |
1427 | struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base); |
1428 | struct drm_device *dev = encoder->base.dev; | |
1429 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1430 | uint32_t dp_reg = I915_READ(intel_dp->output_reg); | |
5d613501 | 1431 | |
0c33d8d7 DV |
1432 | if (WARN_ON(dp_reg & DP_PORT_EN)) |
1433 | return; | |
5d613501 | 1434 | |
97af61f5 | 1435 | ironlake_edp_panel_vdd_on(intel_dp); |
f01eca2e | 1436 | intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON); |
33a34e4e | 1437 | intel_dp_start_link_train(intel_dp); |
97af61f5 | 1438 | ironlake_edp_panel_on(intel_dp); |
bd943159 | 1439 | ironlake_edp_panel_vdd_off(intel_dp, true); |
33a34e4e | 1440 | intel_dp_complete_link_train(intel_dp); |
f01eca2e | 1441 | ironlake_edp_backlight_on(intel_dp); |
d240f20f JB |
1442 | } |
1443 | ||
2bd2ad64 | 1444 | static void intel_pre_enable_dp(struct intel_encoder *encoder) |
a4fc5ed6 | 1445 | { |
2bd2ad64 | 1446 | struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base); |
a4fc5ed6 | 1447 | |
2bd2ad64 DV |
1448 | if (is_cpu_edp(intel_dp)) |
1449 | ironlake_edp_pll_on(intel_dp); | |
a4fc5ed6 KP |
1450 | } |
1451 | ||
1452 | /* | |
df0c237d JB |
1453 | * Native read with retry for link status and receiver capability reads for |
1454 | * cases where the sink may still be asleep. | |
a4fc5ed6 KP |
1455 | */ |
1456 | static bool | |
df0c237d JB |
1457 | intel_dp_aux_native_read_retry(struct intel_dp *intel_dp, uint16_t address, |
1458 | uint8_t *recv, int recv_bytes) | |
a4fc5ed6 | 1459 | { |
61da5fab JB |
1460 | int ret, i; |
1461 | ||
df0c237d JB |
1462 | /* |
1463 | * Sinks are *supposed* to come up within 1ms from an off state, | |
1464 | * but we're also supposed to retry 3 times per the spec. | |
1465 | */ | |
61da5fab | 1466 | for (i = 0; i < 3; i++) { |
df0c237d JB |
1467 | ret = intel_dp_aux_native_read(intel_dp, address, recv, |
1468 | recv_bytes); | |
1469 | if (ret == recv_bytes) | |
61da5fab JB |
1470 | return true; |
1471 | msleep(1); | |
1472 | } | |
a4fc5ed6 | 1473 | |
61da5fab | 1474 | return false; |
a4fc5ed6 KP |
1475 | } |
1476 | ||
1477 | /* | |
1478 | * Fetch AUX CH registers 0x202 - 0x207 which contain | |
1479 | * link status information | |
1480 | */ | |
1481 | static bool | |
93f62dad | 1482 | intel_dp_get_link_status(struct intel_dp *intel_dp, uint8_t link_status[DP_LINK_STATUS_SIZE]) |
a4fc5ed6 | 1483 | { |
df0c237d JB |
1484 | return intel_dp_aux_native_read_retry(intel_dp, |
1485 | DP_LANE0_1_STATUS, | |
93f62dad | 1486 | link_status, |
df0c237d | 1487 | DP_LINK_STATUS_SIZE); |
a4fc5ed6 KP |
1488 | } |
1489 | ||
a4fc5ed6 KP |
1490 | #if 0 |
1491 | static char *voltage_names[] = { | |
1492 | "0.4V", "0.6V", "0.8V", "1.2V" | |
1493 | }; | |
1494 | static char *pre_emph_names[] = { | |
1495 | "0dB", "3.5dB", "6dB", "9.5dB" | |
1496 | }; | |
1497 | static char *link_train_names[] = { | |
1498 | "pattern 1", "pattern 2", "idle", "off" | |
1499 | }; | |
1500 | #endif | |
1501 | ||
1502 | /* | |
1503 | * These are source-specific values; current Intel hardware supports | |
1504 | * a maximum voltage of 800mV and a maximum pre-emphasis of 6dB | |
1505 | */ | |
a4fc5ed6 KP |
1506 | |
1507 | static uint8_t | |
1a2eb460 | 1508 | intel_dp_voltage_max(struct intel_dp *intel_dp) |
a4fc5ed6 | 1509 | { |
30add22d | 1510 | struct drm_device *dev = intel_dp_to_dev(intel_dp); |
1a2eb460 KP |
1511 | |
1512 | if (IS_GEN7(dev) && is_cpu_edp(intel_dp)) | |
1513 | return DP_TRAIN_VOLTAGE_SWING_800; | |
1514 | else if (HAS_PCH_CPT(dev) && !is_cpu_edp(intel_dp)) | |
1515 | return DP_TRAIN_VOLTAGE_SWING_1200; | |
1516 | else | |
1517 | return DP_TRAIN_VOLTAGE_SWING_800; | |
1518 | } | |
1519 | ||
1520 | static uint8_t | |
1521 | intel_dp_pre_emphasis_max(struct intel_dp *intel_dp, uint8_t voltage_swing) | |
1522 | { | |
30add22d | 1523 | struct drm_device *dev = intel_dp_to_dev(intel_dp); |
1a2eb460 | 1524 | |
d6c0d722 PZ |
1525 | if (IS_HASWELL(dev)) { |
1526 | switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) { | |
1527 | case DP_TRAIN_VOLTAGE_SWING_400: | |
1528 | return DP_TRAIN_PRE_EMPHASIS_9_5; | |
1529 | case DP_TRAIN_VOLTAGE_SWING_600: | |
1530 | return DP_TRAIN_PRE_EMPHASIS_6; | |
1531 | case DP_TRAIN_VOLTAGE_SWING_800: | |
1532 | return DP_TRAIN_PRE_EMPHASIS_3_5; | |
1533 | case DP_TRAIN_VOLTAGE_SWING_1200: | |
1534 | default: | |
1535 | return DP_TRAIN_PRE_EMPHASIS_0; | |
1536 | } | |
1537 | } else if (IS_GEN7(dev) && is_cpu_edp(intel_dp) && !IS_VALLEYVIEW(dev)) { | |
1a2eb460 KP |
1538 | switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) { |
1539 | case DP_TRAIN_VOLTAGE_SWING_400: | |
1540 | return DP_TRAIN_PRE_EMPHASIS_6; | |
1541 | case DP_TRAIN_VOLTAGE_SWING_600: | |
1542 | case DP_TRAIN_VOLTAGE_SWING_800: | |
1543 | return DP_TRAIN_PRE_EMPHASIS_3_5; | |
1544 | default: | |
1545 | return DP_TRAIN_PRE_EMPHASIS_0; | |
1546 | } | |
1547 | } else { | |
1548 | switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) { | |
1549 | case DP_TRAIN_VOLTAGE_SWING_400: | |
1550 | return DP_TRAIN_PRE_EMPHASIS_6; | |
1551 | case DP_TRAIN_VOLTAGE_SWING_600: | |
1552 | return DP_TRAIN_PRE_EMPHASIS_6; | |
1553 | case DP_TRAIN_VOLTAGE_SWING_800: | |
1554 | return DP_TRAIN_PRE_EMPHASIS_3_5; | |
1555 | case DP_TRAIN_VOLTAGE_SWING_1200: | |
1556 | default: | |
1557 | return DP_TRAIN_PRE_EMPHASIS_0; | |
1558 | } | |
a4fc5ed6 KP |
1559 | } |
1560 | } | |
1561 | ||
1562 | static void | |
93f62dad | 1563 | intel_get_adjust_train(struct intel_dp *intel_dp, uint8_t link_status[DP_LINK_STATUS_SIZE]) |
a4fc5ed6 KP |
1564 | { |
1565 | uint8_t v = 0; | |
1566 | uint8_t p = 0; | |
1567 | int lane; | |
1a2eb460 KP |
1568 | uint8_t voltage_max; |
1569 | uint8_t preemph_max; | |
a4fc5ed6 | 1570 | |
33a34e4e | 1571 | for (lane = 0; lane < intel_dp->lane_count; lane++) { |
0f037bde DV |
1572 | uint8_t this_v = drm_dp_get_adjust_request_voltage(link_status, lane); |
1573 | uint8_t this_p = drm_dp_get_adjust_request_pre_emphasis(link_status, lane); | |
a4fc5ed6 KP |
1574 | |
1575 | if (this_v > v) | |
1576 | v = this_v; | |
1577 | if (this_p > p) | |
1578 | p = this_p; | |
1579 | } | |
1580 | ||
1a2eb460 | 1581 | voltage_max = intel_dp_voltage_max(intel_dp); |
417e822d KP |
1582 | if (v >= voltage_max) |
1583 | v = voltage_max | DP_TRAIN_MAX_SWING_REACHED; | |
a4fc5ed6 | 1584 | |
1a2eb460 KP |
1585 | preemph_max = intel_dp_pre_emphasis_max(intel_dp, v); |
1586 | if (p >= preemph_max) | |
1587 | p = preemph_max | DP_TRAIN_MAX_PRE_EMPHASIS_REACHED; | |
a4fc5ed6 KP |
1588 | |
1589 | for (lane = 0; lane < 4; lane++) | |
33a34e4e | 1590 | intel_dp->train_set[lane] = v | p; |
a4fc5ed6 KP |
1591 | } |
1592 | ||
1593 | static uint32_t | |
93f62dad | 1594 | intel_dp_signal_levels(uint8_t train_set) |
a4fc5ed6 | 1595 | { |
3cf2efb1 | 1596 | uint32_t signal_levels = 0; |
a4fc5ed6 | 1597 | |
3cf2efb1 | 1598 | switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) { |
a4fc5ed6 KP |
1599 | case DP_TRAIN_VOLTAGE_SWING_400: |
1600 | default: | |
1601 | signal_levels |= DP_VOLTAGE_0_4; | |
1602 | break; | |
1603 | case DP_TRAIN_VOLTAGE_SWING_600: | |
1604 | signal_levels |= DP_VOLTAGE_0_6; | |
1605 | break; | |
1606 | case DP_TRAIN_VOLTAGE_SWING_800: | |
1607 | signal_levels |= DP_VOLTAGE_0_8; | |
1608 | break; | |
1609 | case DP_TRAIN_VOLTAGE_SWING_1200: | |
1610 | signal_levels |= DP_VOLTAGE_1_2; | |
1611 | break; | |
1612 | } | |
3cf2efb1 | 1613 | switch (train_set & DP_TRAIN_PRE_EMPHASIS_MASK) { |
a4fc5ed6 KP |
1614 | case DP_TRAIN_PRE_EMPHASIS_0: |
1615 | default: | |
1616 | signal_levels |= DP_PRE_EMPHASIS_0; | |
1617 | break; | |
1618 | case DP_TRAIN_PRE_EMPHASIS_3_5: | |
1619 | signal_levels |= DP_PRE_EMPHASIS_3_5; | |
1620 | break; | |
1621 | case DP_TRAIN_PRE_EMPHASIS_6: | |
1622 | signal_levels |= DP_PRE_EMPHASIS_6; | |
1623 | break; | |
1624 | case DP_TRAIN_PRE_EMPHASIS_9_5: | |
1625 | signal_levels |= DP_PRE_EMPHASIS_9_5; | |
1626 | break; | |
1627 | } | |
1628 | return signal_levels; | |
1629 | } | |
1630 | ||
e3421a18 ZW |
1631 | /* Gen6's DP voltage swing and pre-emphasis control */ |
1632 | static uint32_t | |
1633 | intel_gen6_edp_signal_levels(uint8_t train_set) | |
1634 | { | |
3c5a62b5 YL |
1635 | int signal_levels = train_set & (DP_TRAIN_VOLTAGE_SWING_MASK | |
1636 | DP_TRAIN_PRE_EMPHASIS_MASK); | |
1637 | switch (signal_levels) { | |
e3421a18 | 1638 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_0: |
3c5a62b5 YL |
1639 | case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_0: |
1640 | return EDP_LINK_TRAIN_400_600MV_0DB_SNB_B; | |
1641 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_3_5: | |
1642 | return EDP_LINK_TRAIN_400MV_3_5DB_SNB_B; | |
e3421a18 | 1643 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_6: |
3c5a62b5 YL |
1644 | case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_6: |
1645 | return EDP_LINK_TRAIN_400_600MV_6DB_SNB_B; | |
e3421a18 | 1646 | case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_3_5: |
3c5a62b5 YL |
1647 | case DP_TRAIN_VOLTAGE_SWING_800 | DP_TRAIN_PRE_EMPHASIS_3_5: |
1648 | return EDP_LINK_TRAIN_600_800MV_3_5DB_SNB_B; | |
e3421a18 | 1649 | case DP_TRAIN_VOLTAGE_SWING_800 | DP_TRAIN_PRE_EMPHASIS_0: |
3c5a62b5 YL |
1650 | case DP_TRAIN_VOLTAGE_SWING_1200 | DP_TRAIN_PRE_EMPHASIS_0: |
1651 | return EDP_LINK_TRAIN_800_1200MV_0DB_SNB_B; | |
e3421a18 | 1652 | default: |
3c5a62b5 YL |
1653 | DRM_DEBUG_KMS("Unsupported voltage swing/pre-emphasis level:" |
1654 | "0x%x\n", signal_levels); | |
1655 | return EDP_LINK_TRAIN_400_600MV_0DB_SNB_B; | |
e3421a18 ZW |
1656 | } |
1657 | } | |
1658 | ||
1a2eb460 KP |
1659 | /* Gen7's DP voltage swing and pre-emphasis control */ |
1660 | static uint32_t | |
1661 | intel_gen7_edp_signal_levels(uint8_t train_set) | |
1662 | { | |
1663 | int signal_levels = train_set & (DP_TRAIN_VOLTAGE_SWING_MASK | | |
1664 | DP_TRAIN_PRE_EMPHASIS_MASK); | |
1665 | switch (signal_levels) { | |
1666 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_0: | |
1667 | return EDP_LINK_TRAIN_400MV_0DB_IVB; | |
1668 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_3_5: | |
1669 | return EDP_LINK_TRAIN_400MV_3_5DB_IVB; | |
1670 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_6: | |
1671 | return EDP_LINK_TRAIN_400MV_6DB_IVB; | |
1672 | ||
1673 | case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_0: | |
1674 | return EDP_LINK_TRAIN_600MV_0DB_IVB; | |
1675 | case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_3_5: | |
1676 | return EDP_LINK_TRAIN_600MV_3_5DB_IVB; | |
1677 | ||
1678 | case DP_TRAIN_VOLTAGE_SWING_800 | DP_TRAIN_PRE_EMPHASIS_0: | |
1679 | return EDP_LINK_TRAIN_800MV_0DB_IVB; | |
1680 | case DP_TRAIN_VOLTAGE_SWING_800 | DP_TRAIN_PRE_EMPHASIS_3_5: | |
1681 | return EDP_LINK_TRAIN_800MV_3_5DB_IVB; | |
1682 | ||
1683 | default: | |
1684 | DRM_DEBUG_KMS("Unsupported voltage swing/pre-emphasis level:" | |
1685 | "0x%x\n", signal_levels); | |
1686 | return EDP_LINK_TRAIN_500MV_0DB_IVB; | |
1687 | } | |
1688 | } | |
1689 | ||
d6c0d722 PZ |
1690 | /* Gen7.5's (HSW) DP voltage swing and pre-emphasis control */ |
1691 | static uint32_t | |
1692 | intel_dp_signal_levels_hsw(uint8_t train_set) | |
a4fc5ed6 | 1693 | { |
d6c0d722 PZ |
1694 | int signal_levels = train_set & (DP_TRAIN_VOLTAGE_SWING_MASK | |
1695 | DP_TRAIN_PRE_EMPHASIS_MASK); | |
1696 | switch (signal_levels) { | |
1697 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_0: | |
1698 | return DDI_BUF_EMP_400MV_0DB_HSW; | |
1699 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_3_5: | |
1700 | return DDI_BUF_EMP_400MV_3_5DB_HSW; | |
1701 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_6: | |
1702 | return DDI_BUF_EMP_400MV_6DB_HSW; | |
1703 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_9_5: | |
1704 | return DDI_BUF_EMP_400MV_9_5DB_HSW; | |
a4fc5ed6 | 1705 | |
d6c0d722 PZ |
1706 | case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_0: |
1707 | return DDI_BUF_EMP_600MV_0DB_HSW; | |
1708 | case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_3_5: | |
1709 | return DDI_BUF_EMP_600MV_3_5DB_HSW; | |
1710 | case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_6: | |
1711 | return DDI_BUF_EMP_600MV_6DB_HSW; | |
a4fc5ed6 | 1712 | |
d6c0d722 PZ |
1713 | case DP_TRAIN_VOLTAGE_SWING_800 | DP_TRAIN_PRE_EMPHASIS_0: |
1714 | return DDI_BUF_EMP_800MV_0DB_HSW; | |
1715 | case DP_TRAIN_VOLTAGE_SWING_800 | DP_TRAIN_PRE_EMPHASIS_3_5: | |
1716 | return DDI_BUF_EMP_800MV_3_5DB_HSW; | |
1717 | default: | |
1718 | DRM_DEBUG_KMS("Unsupported voltage swing/pre-emphasis level:" | |
1719 | "0x%x\n", signal_levels); | |
1720 | return DDI_BUF_EMP_400MV_0DB_HSW; | |
a4fc5ed6 | 1721 | } |
a4fc5ed6 KP |
1722 | } |
1723 | ||
1724 | static bool | |
ea5b213a | 1725 | intel_dp_set_link_train(struct intel_dp *intel_dp, |
a4fc5ed6 | 1726 | uint32_t dp_reg_value, |
58e10eb9 | 1727 | uint8_t dp_train_pat) |
a4fc5ed6 | 1728 | { |
174edf1f PZ |
1729 | struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp); |
1730 | struct drm_device *dev = intel_dig_port->base.base.dev; | |
a4fc5ed6 | 1731 | struct drm_i915_private *dev_priv = dev->dev_private; |
174edf1f | 1732 | enum port port = intel_dig_port->port; |
a4fc5ed6 | 1733 | int ret; |
d6c0d722 | 1734 | uint32_t temp; |
a4fc5ed6 | 1735 | |
d6c0d722 | 1736 | if (IS_HASWELL(dev)) { |
174edf1f | 1737 | temp = I915_READ(DP_TP_CTL(port)); |
d6c0d722 PZ |
1738 | |
1739 | if (dp_train_pat & DP_LINK_SCRAMBLING_DISABLE) | |
1740 | temp |= DP_TP_CTL_SCRAMBLE_DISABLE; | |
1741 | else | |
1742 | temp &= ~DP_TP_CTL_SCRAMBLE_DISABLE; | |
1743 | ||
1744 | temp &= ~DP_TP_CTL_LINK_TRAIN_MASK; | |
1745 | switch (dp_train_pat & DP_TRAINING_PATTERN_MASK) { | |
1746 | case DP_TRAINING_PATTERN_DISABLE: | |
1747 | temp |= DP_TP_CTL_LINK_TRAIN_IDLE; | |
174edf1f | 1748 | I915_WRITE(DP_TP_CTL(port), temp); |
d6c0d722 | 1749 | |
174edf1f | 1750 | if (wait_for((I915_READ(DP_TP_STATUS(port)) & |
d6c0d722 PZ |
1751 | DP_TP_STATUS_IDLE_DONE), 1)) |
1752 | DRM_ERROR("Timed out waiting for DP idle patterns\n"); | |
1753 | ||
1754 | temp &= ~DP_TP_CTL_LINK_TRAIN_MASK; | |
1755 | temp |= DP_TP_CTL_LINK_TRAIN_NORMAL; | |
1756 | ||
1757 | break; | |
1758 | case DP_TRAINING_PATTERN_1: | |
1759 | temp |= DP_TP_CTL_LINK_TRAIN_PAT1; | |
1760 | break; | |
1761 | case DP_TRAINING_PATTERN_2: | |
1762 | temp |= DP_TP_CTL_LINK_TRAIN_PAT2; | |
1763 | break; | |
1764 | case DP_TRAINING_PATTERN_3: | |
1765 | temp |= DP_TP_CTL_LINK_TRAIN_PAT3; | |
1766 | break; | |
1767 | } | |
174edf1f | 1768 | I915_WRITE(DP_TP_CTL(port), temp); |
d6c0d722 PZ |
1769 | |
1770 | } else if (HAS_PCH_CPT(dev) && | |
1771 | (IS_GEN7(dev) || !is_cpu_edp(intel_dp))) { | |
47ea7542 PZ |
1772 | dp_reg_value &= ~DP_LINK_TRAIN_MASK_CPT; |
1773 | ||
1774 | switch (dp_train_pat & DP_TRAINING_PATTERN_MASK) { | |
1775 | case DP_TRAINING_PATTERN_DISABLE: | |
1776 | dp_reg_value |= DP_LINK_TRAIN_OFF_CPT; | |
1777 | break; | |
1778 | case DP_TRAINING_PATTERN_1: | |
1779 | dp_reg_value |= DP_LINK_TRAIN_PAT_1_CPT; | |
1780 | break; | |
1781 | case DP_TRAINING_PATTERN_2: | |
1782 | dp_reg_value |= DP_LINK_TRAIN_PAT_2_CPT; | |
1783 | break; | |
1784 | case DP_TRAINING_PATTERN_3: | |
1785 | DRM_ERROR("DP training pattern 3 not supported\n"); | |
1786 | dp_reg_value |= DP_LINK_TRAIN_PAT_2_CPT; | |
1787 | break; | |
1788 | } | |
1789 | ||
1790 | } else { | |
1791 | dp_reg_value &= ~DP_LINK_TRAIN_MASK; | |
1792 | ||
1793 | switch (dp_train_pat & DP_TRAINING_PATTERN_MASK) { | |
1794 | case DP_TRAINING_PATTERN_DISABLE: | |
1795 | dp_reg_value |= DP_LINK_TRAIN_OFF; | |
1796 | break; | |
1797 | case DP_TRAINING_PATTERN_1: | |
1798 | dp_reg_value |= DP_LINK_TRAIN_PAT_1; | |
1799 | break; | |
1800 | case DP_TRAINING_PATTERN_2: | |
1801 | dp_reg_value |= DP_LINK_TRAIN_PAT_2; | |
1802 | break; | |
1803 | case DP_TRAINING_PATTERN_3: | |
1804 | DRM_ERROR("DP training pattern 3 not supported\n"); | |
1805 | dp_reg_value |= DP_LINK_TRAIN_PAT_2; | |
1806 | break; | |
1807 | } | |
1808 | } | |
1809 | ||
ea5b213a CW |
1810 | I915_WRITE(intel_dp->output_reg, dp_reg_value); |
1811 | POSTING_READ(intel_dp->output_reg); | |
a4fc5ed6 | 1812 | |
ea5b213a | 1813 | intel_dp_aux_native_write_1(intel_dp, |
a4fc5ed6 KP |
1814 | DP_TRAINING_PATTERN_SET, |
1815 | dp_train_pat); | |
1816 | ||
47ea7542 PZ |
1817 | if ((dp_train_pat & DP_TRAINING_PATTERN_MASK) != |
1818 | DP_TRAINING_PATTERN_DISABLE) { | |
1819 | ret = intel_dp_aux_native_write(intel_dp, | |
1820 | DP_TRAINING_LANE0_SET, | |
1821 | intel_dp->train_set, | |
1822 | intel_dp->lane_count); | |
1823 | if (ret != intel_dp->lane_count) | |
1824 | return false; | |
1825 | } | |
a4fc5ed6 KP |
1826 | |
1827 | return true; | |
1828 | } | |
1829 | ||
33a34e4e | 1830 | /* Enable corresponding port and start training pattern 1 */ |
c19b0669 | 1831 | void |
33a34e4e | 1832 | intel_dp_start_link_train(struct intel_dp *intel_dp) |
a4fc5ed6 | 1833 | { |
da63a9f2 | 1834 | struct drm_encoder *encoder = &dp_to_dig_port(intel_dp)->base.base; |
c19b0669 | 1835 | struct drm_device *dev = encoder->dev; |
a4fc5ed6 KP |
1836 | int i; |
1837 | uint8_t voltage; | |
1838 | bool clock_recovery = false; | |
cdb0e95b | 1839 | int voltage_tries, loop_tries; |
ea5b213a | 1840 | uint32_t DP = intel_dp->DP; |
a4fc5ed6 | 1841 | |
affa9354 | 1842 | if (HAS_DDI(dev)) |
c19b0669 PZ |
1843 | intel_ddi_prepare_link_retrain(encoder); |
1844 | ||
3cf2efb1 CW |
1845 | /* Write the link configuration data */ |
1846 | intel_dp_aux_native_write(intel_dp, DP_LINK_BW_SET, | |
1847 | intel_dp->link_configuration, | |
1848 | DP_LINK_CONFIGURATION_SIZE); | |
a4fc5ed6 KP |
1849 | |
1850 | DP |= DP_PORT_EN; | |
1a2eb460 | 1851 | |
33a34e4e | 1852 | memset(intel_dp->train_set, 0, 4); |
a4fc5ed6 | 1853 | voltage = 0xff; |
cdb0e95b KP |
1854 | voltage_tries = 0; |
1855 | loop_tries = 0; | |
a4fc5ed6 KP |
1856 | clock_recovery = false; |
1857 | for (;;) { | |
33a34e4e | 1858 | /* Use intel_dp->train_set[0] to set the voltage and pre emphasis values */ |
93f62dad | 1859 | uint8_t link_status[DP_LINK_STATUS_SIZE]; |
e3421a18 | 1860 | uint32_t signal_levels; |
417e822d | 1861 | |
d6c0d722 PZ |
1862 | if (IS_HASWELL(dev)) { |
1863 | signal_levels = intel_dp_signal_levels_hsw( | |
1864 | intel_dp->train_set[0]); | |
1865 | DP = (DP & ~DDI_BUF_EMP_MASK) | signal_levels; | |
1866 | } else if (IS_GEN7(dev) && is_cpu_edp(intel_dp) && !IS_VALLEYVIEW(dev)) { | |
1a2eb460 KP |
1867 | signal_levels = intel_gen7_edp_signal_levels(intel_dp->train_set[0]); |
1868 | DP = (DP & ~EDP_LINK_TRAIN_VOL_EMP_MASK_IVB) | signal_levels; | |
1869 | } else if (IS_GEN6(dev) && is_cpu_edp(intel_dp)) { | |
33a34e4e | 1870 | signal_levels = intel_gen6_edp_signal_levels(intel_dp->train_set[0]); |
e3421a18 ZW |
1871 | DP = (DP & ~EDP_LINK_TRAIN_VOL_EMP_MASK_SNB) | signal_levels; |
1872 | } else { | |
93f62dad | 1873 | signal_levels = intel_dp_signal_levels(intel_dp->train_set[0]); |
e3421a18 ZW |
1874 | DP = (DP & ~(DP_VOLTAGE_MASK|DP_PRE_EMPHASIS_MASK)) | signal_levels; |
1875 | } | |
d6c0d722 PZ |
1876 | DRM_DEBUG_KMS("training pattern 1 signal levels %08x\n", |
1877 | signal_levels); | |
a4fc5ed6 | 1878 | |
a7c9655f | 1879 | /* Set training pattern 1 */ |
47ea7542 | 1880 | if (!intel_dp_set_link_train(intel_dp, DP, |
81055854 AJ |
1881 | DP_TRAINING_PATTERN_1 | |
1882 | DP_LINK_SCRAMBLING_DISABLE)) | |
a4fc5ed6 | 1883 | break; |
a4fc5ed6 | 1884 | |
a7c9655f | 1885 | drm_dp_link_train_clock_recovery_delay(intel_dp->dpcd); |
93f62dad KP |
1886 | if (!intel_dp_get_link_status(intel_dp, link_status)) { |
1887 | DRM_ERROR("failed to get link status\n"); | |
a4fc5ed6 | 1888 | break; |
93f62dad | 1889 | } |
a4fc5ed6 | 1890 | |
01916270 | 1891 | if (drm_dp_clock_recovery_ok(link_status, intel_dp->lane_count)) { |
93f62dad | 1892 | DRM_DEBUG_KMS("clock recovery OK\n"); |
3cf2efb1 CW |
1893 | clock_recovery = true; |
1894 | break; | |
1895 | } | |
1896 | ||
1897 | /* Check to see if we've tried the max voltage */ | |
1898 | for (i = 0; i < intel_dp->lane_count; i++) | |
1899 | if ((intel_dp->train_set[i] & DP_TRAIN_MAX_SWING_REACHED) == 0) | |
a4fc5ed6 | 1900 | break; |
0d710688 | 1901 | if (i == intel_dp->lane_count && voltage_tries == 5) { |
b06fbda3 DV |
1902 | ++loop_tries; |
1903 | if (loop_tries == 5) { | |
cdb0e95b KP |
1904 | DRM_DEBUG_KMS("too many full retries, give up\n"); |
1905 | break; | |
1906 | } | |
1907 | memset(intel_dp->train_set, 0, 4); | |
1908 | voltage_tries = 0; | |
1909 | continue; | |
1910 | } | |
a4fc5ed6 | 1911 | |
3cf2efb1 | 1912 | /* Check to see if we've tried the same voltage 5 times */ |
b06fbda3 | 1913 | if ((intel_dp->train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK) == voltage) { |
24773670 | 1914 | ++voltage_tries; |
b06fbda3 DV |
1915 | if (voltage_tries == 5) { |
1916 | DRM_DEBUG_KMS("too many voltage retries, give up\n"); | |
1917 | break; | |
1918 | } | |
1919 | } else | |
1920 | voltage_tries = 0; | |
1921 | voltage = intel_dp->train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK; | |
a4fc5ed6 | 1922 | |
3cf2efb1 | 1923 | /* Compute new intel_dp->train_set as requested by target */ |
93f62dad | 1924 | intel_get_adjust_train(intel_dp, link_status); |
a4fc5ed6 KP |
1925 | } |
1926 | ||
33a34e4e JB |
1927 | intel_dp->DP = DP; |
1928 | } | |
1929 | ||
c19b0669 | 1930 | void |
33a34e4e JB |
1931 | intel_dp_complete_link_train(struct intel_dp *intel_dp) |
1932 | { | |
30add22d | 1933 | struct drm_device *dev = intel_dp_to_dev(intel_dp); |
33a34e4e | 1934 | bool channel_eq = false; |
37f80975 | 1935 | int tries, cr_tries; |
33a34e4e JB |
1936 | uint32_t DP = intel_dp->DP; |
1937 | ||
a4fc5ed6 KP |
1938 | /* channel equalization */ |
1939 | tries = 0; | |
37f80975 | 1940 | cr_tries = 0; |
a4fc5ed6 KP |
1941 | channel_eq = false; |
1942 | for (;;) { | |
33a34e4e | 1943 | /* Use intel_dp->train_set[0] to set the voltage and pre emphasis values */ |
e3421a18 | 1944 | uint32_t signal_levels; |
93f62dad | 1945 | uint8_t link_status[DP_LINK_STATUS_SIZE]; |
e3421a18 | 1946 | |
37f80975 JB |
1947 | if (cr_tries > 5) { |
1948 | DRM_ERROR("failed to train DP, aborting\n"); | |
1949 | intel_dp_link_down(intel_dp); | |
1950 | break; | |
1951 | } | |
1952 | ||
d6c0d722 PZ |
1953 | if (IS_HASWELL(dev)) { |
1954 | signal_levels = intel_dp_signal_levels_hsw(intel_dp->train_set[0]); | |
1955 | DP = (DP & ~DDI_BUF_EMP_MASK) | signal_levels; | |
1956 | } else if (IS_GEN7(dev) && is_cpu_edp(intel_dp) && !IS_VALLEYVIEW(dev)) { | |
1a2eb460 KP |
1957 | signal_levels = intel_gen7_edp_signal_levels(intel_dp->train_set[0]); |
1958 | DP = (DP & ~EDP_LINK_TRAIN_VOL_EMP_MASK_IVB) | signal_levels; | |
1959 | } else if (IS_GEN6(dev) && is_cpu_edp(intel_dp)) { | |
33a34e4e | 1960 | signal_levels = intel_gen6_edp_signal_levels(intel_dp->train_set[0]); |
e3421a18 ZW |
1961 | DP = (DP & ~EDP_LINK_TRAIN_VOL_EMP_MASK_SNB) | signal_levels; |
1962 | } else { | |
93f62dad | 1963 | signal_levels = intel_dp_signal_levels(intel_dp->train_set[0]); |
e3421a18 ZW |
1964 | DP = (DP & ~(DP_VOLTAGE_MASK|DP_PRE_EMPHASIS_MASK)) | signal_levels; |
1965 | } | |
1966 | ||
a4fc5ed6 | 1967 | /* channel eq pattern */ |
47ea7542 | 1968 | if (!intel_dp_set_link_train(intel_dp, DP, |
81055854 AJ |
1969 | DP_TRAINING_PATTERN_2 | |
1970 | DP_LINK_SCRAMBLING_DISABLE)) | |
a4fc5ed6 KP |
1971 | break; |
1972 | ||
a7c9655f | 1973 | drm_dp_link_train_channel_eq_delay(intel_dp->dpcd); |
93f62dad | 1974 | if (!intel_dp_get_link_status(intel_dp, link_status)) |
a4fc5ed6 | 1975 | break; |
a4fc5ed6 | 1976 | |
37f80975 | 1977 | /* Make sure clock is still ok */ |
01916270 | 1978 | if (!drm_dp_clock_recovery_ok(link_status, intel_dp->lane_count)) { |
37f80975 JB |
1979 | intel_dp_start_link_train(intel_dp); |
1980 | cr_tries++; | |
1981 | continue; | |
1982 | } | |
1983 | ||
1ffdff13 | 1984 | if (drm_dp_channel_eq_ok(link_status, intel_dp->lane_count)) { |
3cf2efb1 CW |
1985 | channel_eq = true; |
1986 | break; | |
1987 | } | |
a4fc5ed6 | 1988 | |
37f80975 JB |
1989 | /* Try 5 times, then try clock recovery if that fails */ |
1990 | if (tries > 5) { | |
1991 | intel_dp_link_down(intel_dp); | |
1992 | intel_dp_start_link_train(intel_dp); | |
1993 | tries = 0; | |
1994 | cr_tries++; | |
1995 | continue; | |
1996 | } | |
a4fc5ed6 | 1997 | |
3cf2efb1 | 1998 | /* Compute new intel_dp->train_set as requested by target */ |
93f62dad | 1999 | intel_get_adjust_train(intel_dp, link_status); |
3cf2efb1 | 2000 | ++tries; |
869184a6 | 2001 | } |
3cf2efb1 | 2002 | |
d6c0d722 PZ |
2003 | if (channel_eq) |
2004 | DRM_DEBUG_KMS("Channel EQ done. DP Training successfull\n"); | |
2005 | ||
47ea7542 | 2006 | intel_dp_set_link_train(intel_dp, DP, DP_TRAINING_PATTERN_DISABLE); |
a4fc5ed6 KP |
2007 | } |
2008 | ||
2009 | static void | |
ea5b213a | 2010 | intel_dp_link_down(struct intel_dp *intel_dp) |
a4fc5ed6 | 2011 | { |
da63a9f2 PZ |
2012 | struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp); |
2013 | struct drm_device *dev = intel_dig_port->base.base.dev; | |
a4fc5ed6 | 2014 | struct drm_i915_private *dev_priv = dev->dev_private; |
ea5b213a | 2015 | uint32_t DP = intel_dp->DP; |
a4fc5ed6 | 2016 | |
c19b0669 PZ |
2017 | /* |
2018 | * DDI code has a strict mode set sequence and we should try to respect | |
2019 | * it, otherwise we might hang the machine in many different ways. So we | |
2020 | * really should be disabling the port only on a complete crtc_disable | |
2021 | * sequence. This function is just called under two conditions on DDI | |
2022 | * code: | |
2023 | * - Link train failed while doing crtc_enable, and on this case we | |
2024 | * really should respect the mode set sequence and wait for a | |
2025 | * crtc_disable. | |
2026 | * - Someone turned the monitor off and intel_dp_check_link_status | |
2027 | * called us. We don't need to disable the whole port on this case, so | |
2028 | * when someone turns the monitor on again, | |
2029 | * intel_ddi_prepare_link_retrain will take care of redoing the link | |
2030 | * train. | |
2031 | */ | |
affa9354 | 2032 | if (HAS_DDI(dev)) |
c19b0669 PZ |
2033 | return; |
2034 | ||
0c33d8d7 | 2035 | if (WARN_ON((I915_READ(intel_dp->output_reg) & DP_PORT_EN) == 0)) |
1b39d6f3 CW |
2036 | return; |
2037 | ||
28c97730 | 2038 | DRM_DEBUG_KMS("\n"); |
32f9d658 | 2039 | |
1a2eb460 | 2040 | if (HAS_PCH_CPT(dev) && (IS_GEN7(dev) || !is_cpu_edp(intel_dp))) { |
e3421a18 | 2041 | DP &= ~DP_LINK_TRAIN_MASK_CPT; |
ea5b213a | 2042 | I915_WRITE(intel_dp->output_reg, DP | DP_LINK_TRAIN_PAT_IDLE_CPT); |
e3421a18 ZW |
2043 | } else { |
2044 | DP &= ~DP_LINK_TRAIN_MASK; | |
ea5b213a | 2045 | I915_WRITE(intel_dp->output_reg, DP | DP_LINK_TRAIN_PAT_IDLE); |
e3421a18 | 2046 | } |
fe255d00 | 2047 | POSTING_READ(intel_dp->output_reg); |
5eb08b69 | 2048 | |
fe255d00 | 2049 | msleep(17); |
5eb08b69 | 2050 | |
493a7081 | 2051 | if (HAS_PCH_IBX(dev) && |
1b39d6f3 | 2052 | I915_READ(intel_dp->output_reg) & DP_PIPEB_SELECT) { |
da63a9f2 | 2053 | struct drm_crtc *crtc = intel_dig_port->base.base.crtc; |
31acbcc4 | 2054 | |
5bddd17f EA |
2055 | /* Hardware workaround: leaving our transcoder select |
2056 | * set to transcoder B while it's off will prevent the | |
2057 | * corresponding HDMI output on transcoder A. | |
2058 | * | |
2059 | * Combine this with another hardware workaround: | |
2060 | * transcoder select bit can only be cleared while the | |
2061 | * port is enabled. | |
2062 | */ | |
2063 | DP &= ~DP_PIPEB_SELECT; | |
2064 | I915_WRITE(intel_dp->output_reg, DP); | |
2065 | ||
2066 | /* Changes to enable or select take place the vblank | |
2067 | * after being written. | |
2068 | */ | |
31acbcc4 CW |
2069 | if (crtc == NULL) { |
2070 | /* We can arrive here never having been attached | |
2071 | * to a CRTC, for instance, due to inheriting | |
2072 | * random state from the BIOS. | |
2073 | * | |
2074 | * If the pipe is not running, play safe and | |
2075 | * wait for the clocks to stabilise before | |
2076 | * continuing. | |
2077 | */ | |
2078 | POSTING_READ(intel_dp->output_reg); | |
2079 | msleep(50); | |
2080 | } else | |
2081 | intel_wait_for_vblank(dev, to_intel_crtc(crtc)->pipe); | |
5bddd17f EA |
2082 | } |
2083 | ||
832afda6 | 2084 | DP &= ~DP_AUDIO_OUTPUT_ENABLE; |
ea5b213a CW |
2085 | I915_WRITE(intel_dp->output_reg, DP & ~DP_PORT_EN); |
2086 | POSTING_READ(intel_dp->output_reg); | |
f01eca2e | 2087 | msleep(intel_dp->panel_power_down_delay); |
a4fc5ed6 KP |
2088 | } |
2089 | ||
26d61aad KP |
2090 | static bool |
2091 | intel_dp_get_dpcd(struct intel_dp *intel_dp) | |
92fd8fd1 | 2092 | { |
92fd8fd1 | 2093 | if (intel_dp_aux_native_read_retry(intel_dp, 0x000, intel_dp->dpcd, |
edb39244 AJ |
2094 | sizeof(intel_dp->dpcd)) == 0) |
2095 | return false; /* aux transfer failed */ | |
92fd8fd1 | 2096 | |
edb39244 AJ |
2097 | if (intel_dp->dpcd[DP_DPCD_REV] == 0) |
2098 | return false; /* DPCD not present */ | |
2099 | ||
2100 | if (!(intel_dp->dpcd[DP_DOWNSTREAMPORT_PRESENT] & | |
2101 | DP_DWN_STRM_PORT_PRESENT)) | |
2102 | return true; /* native DP sink */ | |
2103 | ||
2104 | if (intel_dp->dpcd[DP_DPCD_REV] == 0x10) | |
2105 | return true; /* no per-port downstream info */ | |
2106 | ||
2107 | if (intel_dp_aux_native_read_retry(intel_dp, DP_DOWNSTREAM_PORT_0, | |
2108 | intel_dp->downstream_ports, | |
2109 | DP_MAX_DOWNSTREAM_PORTS) == 0) | |
2110 | return false; /* downstream port status fetch failed */ | |
2111 | ||
2112 | return true; | |
92fd8fd1 KP |
2113 | } |
2114 | ||
0d198328 AJ |
2115 | static void |
2116 | intel_dp_probe_oui(struct intel_dp *intel_dp) | |
2117 | { | |
2118 | u8 buf[3]; | |
2119 | ||
2120 | if (!(intel_dp->dpcd[DP_DOWN_STREAM_PORT_COUNT] & DP_OUI_SUPPORT)) | |
2121 | return; | |
2122 | ||
351cfc34 DV |
2123 | ironlake_edp_panel_vdd_on(intel_dp); |
2124 | ||
0d198328 AJ |
2125 | if (intel_dp_aux_native_read_retry(intel_dp, DP_SINK_OUI, buf, 3)) |
2126 | DRM_DEBUG_KMS("Sink OUI: %02hx%02hx%02hx\n", | |
2127 | buf[0], buf[1], buf[2]); | |
2128 | ||
2129 | if (intel_dp_aux_native_read_retry(intel_dp, DP_BRANCH_OUI, buf, 3)) | |
2130 | DRM_DEBUG_KMS("Branch OUI: %02hx%02hx%02hx\n", | |
2131 | buf[0], buf[1], buf[2]); | |
351cfc34 DV |
2132 | |
2133 | ironlake_edp_panel_vdd_off(intel_dp, false); | |
0d198328 AJ |
2134 | } |
2135 | ||
a60f0e38 JB |
2136 | static bool |
2137 | intel_dp_get_sink_irq(struct intel_dp *intel_dp, u8 *sink_irq_vector) | |
2138 | { | |
2139 | int ret; | |
2140 | ||
2141 | ret = intel_dp_aux_native_read_retry(intel_dp, | |
2142 | DP_DEVICE_SERVICE_IRQ_VECTOR, | |
2143 | sink_irq_vector, 1); | |
2144 | if (!ret) | |
2145 | return false; | |
2146 | ||
2147 | return true; | |
2148 | } | |
2149 | ||
2150 | static void | |
2151 | intel_dp_handle_test_request(struct intel_dp *intel_dp) | |
2152 | { | |
2153 | /* NAK by default */ | |
9324cf7f | 2154 | intel_dp_aux_native_write_1(intel_dp, DP_TEST_RESPONSE, DP_TEST_NAK); |
a60f0e38 JB |
2155 | } |
2156 | ||
a4fc5ed6 KP |
2157 | /* |
2158 | * According to DP spec | |
2159 | * 5.1.2: | |
2160 | * 1. Read DPCD | |
2161 | * 2. Configure link according to Receiver Capabilities | |
2162 | * 3. Use Link Training from 2.5.3.3 and 3.5.1.3 | |
2163 | * 4. Check link status on receipt of hot-plug interrupt | |
2164 | */ | |
2165 | ||
00c09d70 | 2166 | void |
ea5b213a | 2167 | intel_dp_check_link_status(struct intel_dp *intel_dp) |
a4fc5ed6 | 2168 | { |
da63a9f2 | 2169 | struct intel_encoder *intel_encoder = &dp_to_dig_port(intel_dp)->base; |
a60f0e38 | 2170 | u8 sink_irq_vector; |
93f62dad | 2171 | u8 link_status[DP_LINK_STATUS_SIZE]; |
a60f0e38 | 2172 | |
da63a9f2 | 2173 | if (!intel_encoder->connectors_active) |
d2b996ac | 2174 | return; |
59cd09e1 | 2175 | |
da63a9f2 | 2176 | if (WARN_ON(!intel_encoder->base.crtc)) |
a4fc5ed6 KP |
2177 | return; |
2178 | ||
92fd8fd1 | 2179 | /* Try to read receiver status if the link appears to be up */ |
93f62dad | 2180 | if (!intel_dp_get_link_status(intel_dp, link_status)) { |
ea5b213a | 2181 | intel_dp_link_down(intel_dp); |
a4fc5ed6 KP |
2182 | return; |
2183 | } | |
2184 | ||
92fd8fd1 | 2185 | /* Now read the DPCD to see if it's actually running */ |
26d61aad | 2186 | if (!intel_dp_get_dpcd(intel_dp)) { |
59cd09e1 JB |
2187 | intel_dp_link_down(intel_dp); |
2188 | return; | |
2189 | } | |
2190 | ||
a60f0e38 JB |
2191 | /* Try to read the source of the interrupt */ |
2192 | if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11 && | |
2193 | intel_dp_get_sink_irq(intel_dp, &sink_irq_vector)) { | |
2194 | /* Clear interrupt source */ | |
2195 | intel_dp_aux_native_write_1(intel_dp, | |
2196 | DP_DEVICE_SERVICE_IRQ_VECTOR, | |
2197 | sink_irq_vector); | |
2198 | ||
2199 | if (sink_irq_vector & DP_AUTOMATED_TEST_REQUEST) | |
2200 | intel_dp_handle_test_request(intel_dp); | |
2201 | if (sink_irq_vector & (DP_CP_IRQ | DP_SINK_SPECIFIC_IRQ)) | |
2202 | DRM_DEBUG_DRIVER("CP or sink specific irq unhandled\n"); | |
2203 | } | |
2204 | ||
1ffdff13 | 2205 | if (!drm_dp_channel_eq_ok(link_status, intel_dp->lane_count)) { |
92fd8fd1 | 2206 | DRM_DEBUG_KMS("%s: channel EQ not ok, retraining\n", |
da63a9f2 | 2207 | drm_get_encoder_name(&intel_encoder->base)); |
33a34e4e JB |
2208 | intel_dp_start_link_train(intel_dp); |
2209 | intel_dp_complete_link_train(intel_dp); | |
2210 | } | |
a4fc5ed6 | 2211 | } |
a4fc5ed6 | 2212 | |
caf9ab24 | 2213 | /* XXX this is probably wrong for multiple downstream ports */ |
71ba9000 | 2214 | static enum drm_connector_status |
26d61aad | 2215 | intel_dp_detect_dpcd(struct intel_dp *intel_dp) |
71ba9000 | 2216 | { |
caf9ab24 AJ |
2217 | uint8_t *dpcd = intel_dp->dpcd; |
2218 | bool hpd; | |
2219 | uint8_t type; | |
2220 | ||
2221 | if (!intel_dp_get_dpcd(intel_dp)) | |
2222 | return connector_status_disconnected; | |
2223 | ||
2224 | /* if there's no downstream port, we're done */ | |
2225 | if (!(dpcd[DP_DOWNSTREAMPORT_PRESENT] & DP_DWN_STRM_PORT_PRESENT)) | |
26d61aad | 2226 | return connector_status_connected; |
caf9ab24 AJ |
2227 | |
2228 | /* If we're HPD-aware, SINK_COUNT changes dynamically */ | |
2229 | hpd = !!(intel_dp->downstream_ports[0] & DP_DS_PORT_HPD); | |
2230 | if (hpd) { | |
23235177 | 2231 | uint8_t reg; |
caf9ab24 | 2232 | if (!intel_dp_aux_native_read_retry(intel_dp, DP_SINK_COUNT, |
23235177 | 2233 | ®, 1)) |
caf9ab24 | 2234 | return connector_status_unknown; |
23235177 AJ |
2235 | return DP_GET_SINK_COUNT(reg) ? connector_status_connected |
2236 | : connector_status_disconnected; | |
caf9ab24 AJ |
2237 | } |
2238 | ||
2239 | /* If no HPD, poke DDC gently */ | |
2240 | if (drm_probe_ddc(&intel_dp->adapter)) | |
26d61aad | 2241 | return connector_status_connected; |
caf9ab24 AJ |
2242 | |
2243 | /* Well we tried, say unknown for unreliable port types */ | |
2244 | type = intel_dp->downstream_ports[0] & DP_DS_PORT_TYPE_MASK; | |
2245 | if (type == DP_DS_PORT_TYPE_VGA || type == DP_DS_PORT_TYPE_NON_EDID) | |
2246 | return connector_status_unknown; | |
2247 | ||
2248 | /* Anything else is out of spec, warn and ignore */ | |
2249 | DRM_DEBUG_KMS("Broken DP branch device, ignoring\n"); | |
26d61aad | 2250 | return connector_status_disconnected; |
71ba9000 AJ |
2251 | } |
2252 | ||
5eb08b69 | 2253 | static enum drm_connector_status |
a9756bb5 | 2254 | ironlake_dp_detect(struct intel_dp *intel_dp) |
5eb08b69 | 2255 | { |
30add22d | 2256 | struct drm_device *dev = intel_dp_to_dev(intel_dp); |
5eb08b69 ZW |
2257 | enum drm_connector_status status; |
2258 | ||
fe16d949 CW |
2259 | /* Can't disconnect eDP, but you can close the lid... */ |
2260 | if (is_edp(intel_dp)) { | |
30add22d | 2261 | status = intel_panel_detect(dev); |
fe16d949 CW |
2262 | if (status == connector_status_unknown) |
2263 | status = connector_status_connected; | |
2264 | return status; | |
2265 | } | |
01cb9ea6 | 2266 | |
26d61aad | 2267 | return intel_dp_detect_dpcd(intel_dp); |
5eb08b69 ZW |
2268 | } |
2269 | ||
a4fc5ed6 | 2270 | static enum drm_connector_status |
a9756bb5 | 2271 | g4x_dp_detect(struct intel_dp *intel_dp) |
a4fc5ed6 | 2272 | { |
30add22d | 2273 | struct drm_device *dev = intel_dp_to_dev(intel_dp); |
a4fc5ed6 | 2274 | struct drm_i915_private *dev_priv = dev->dev_private; |
10f76a38 | 2275 | uint32_t bit; |
5eb08b69 | 2276 | |
ea5b213a | 2277 | switch (intel_dp->output_reg) { |
a4fc5ed6 | 2278 | case DP_B: |
10f76a38 | 2279 | bit = DPB_HOTPLUG_LIVE_STATUS; |
a4fc5ed6 KP |
2280 | break; |
2281 | case DP_C: | |
10f76a38 | 2282 | bit = DPC_HOTPLUG_LIVE_STATUS; |
a4fc5ed6 KP |
2283 | break; |
2284 | case DP_D: | |
10f76a38 | 2285 | bit = DPD_HOTPLUG_LIVE_STATUS; |
a4fc5ed6 KP |
2286 | break; |
2287 | default: | |
2288 | return connector_status_unknown; | |
2289 | } | |
2290 | ||
10f76a38 | 2291 | if ((I915_READ(PORT_HOTPLUG_STAT) & bit) == 0) |
a4fc5ed6 KP |
2292 | return connector_status_disconnected; |
2293 | ||
26d61aad | 2294 | return intel_dp_detect_dpcd(intel_dp); |
a9756bb5 ZW |
2295 | } |
2296 | ||
8c241fef KP |
2297 | static struct edid * |
2298 | intel_dp_get_edid(struct drm_connector *connector, struct i2c_adapter *adapter) | |
2299 | { | |
9cd300e0 | 2300 | struct intel_connector *intel_connector = to_intel_connector(connector); |
d6f24d0f | 2301 | |
9cd300e0 JN |
2302 | /* use cached edid if we have one */ |
2303 | if (intel_connector->edid) { | |
2304 | struct edid *edid; | |
2305 | int size; | |
2306 | ||
2307 | /* invalid edid */ | |
2308 | if (IS_ERR(intel_connector->edid)) | |
d6f24d0f JB |
2309 | return NULL; |
2310 | ||
9cd300e0 | 2311 | size = (intel_connector->edid->extensions + 1) * EDID_LENGTH; |
d6f24d0f JB |
2312 | edid = kmalloc(size, GFP_KERNEL); |
2313 | if (!edid) | |
2314 | return NULL; | |
2315 | ||
9cd300e0 | 2316 | memcpy(edid, intel_connector->edid, size); |
d6f24d0f JB |
2317 | return edid; |
2318 | } | |
8c241fef | 2319 | |
9cd300e0 | 2320 | return drm_get_edid(connector, adapter); |
8c241fef KP |
2321 | } |
2322 | ||
2323 | static int | |
2324 | intel_dp_get_edid_modes(struct drm_connector *connector, struct i2c_adapter *adapter) | |
2325 | { | |
9cd300e0 | 2326 | struct intel_connector *intel_connector = to_intel_connector(connector); |
8c241fef | 2327 | |
9cd300e0 JN |
2328 | /* use cached edid if we have one */ |
2329 | if (intel_connector->edid) { | |
2330 | /* invalid edid */ | |
2331 | if (IS_ERR(intel_connector->edid)) | |
2332 | return 0; | |
2333 | ||
2334 | return intel_connector_update_modes(connector, | |
2335 | intel_connector->edid); | |
d6f24d0f JB |
2336 | } |
2337 | ||
9cd300e0 | 2338 | return intel_ddc_get_modes(connector, adapter); |
8c241fef KP |
2339 | } |
2340 | ||
2341 | ||
a9756bb5 ZW |
2342 | /** |
2343 | * Uses CRT_HOTPLUG_EN and CRT_HOTPLUG_STAT to detect DP connection. | |
2344 | * | |
2345 | * \return true if DP port is connected. | |
2346 | * \return false if DP port is disconnected. | |
2347 | */ | |
2348 | static enum drm_connector_status | |
2349 | intel_dp_detect(struct drm_connector *connector, bool force) | |
2350 | { | |
2351 | struct intel_dp *intel_dp = intel_attached_dp(connector); | |
d63885da PZ |
2352 | struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp); |
2353 | struct intel_encoder *intel_encoder = &intel_dig_port->base; | |
fa90ecef | 2354 | struct drm_device *dev = connector->dev; |
a9756bb5 ZW |
2355 | enum drm_connector_status status; |
2356 | struct edid *edid = NULL; | |
898076ed | 2357 | char dpcd_hex_dump[sizeof(intel_dp->dpcd) * 3]; |
a9756bb5 ZW |
2358 | |
2359 | intel_dp->has_audio = false; | |
2360 | ||
2361 | if (HAS_PCH_SPLIT(dev)) | |
2362 | status = ironlake_dp_detect(intel_dp); | |
2363 | else | |
2364 | status = g4x_dp_detect(intel_dp); | |
1b9be9d0 | 2365 | |
898076ed JN |
2366 | hex_dump_to_buffer(intel_dp->dpcd, sizeof(intel_dp->dpcd), |
2367 | 32, 1, dpcd_hex_dump, sizeof(dpcd_hex_dump), false); | |
2368 | DRM_DEBUG_KMS("DPCD: %s\n", dpcd_hex_dump); | |
1b9be9d0 | 2369 | |
a9756bb5 ZW |
2370 | if (status != connector_status_connected) |
2371 | return status; | |
2372 | ||
0d198328 AJ |
2373 | intel_dp_probe_oui(intel_dp); |
2374 | ||
c3e5f67b DV |
2375 | if (intel_dp->force_audio != HDMI_AUDIO_AUTO) { |
2376 | intel_dp->has_audio = (intel_dp->force_audio == HDMI_AUDIO_ON); | |
f684960e | 2377 | } else { |
8c241fef | 2378 | edid = intel_dp_get_edid(connector, &intel_dp->adapter); |
f684960e CW |
2379 | if (edid) { |
2380 | intel_dp->has_audio = drm_detect_monitor_audio(edid); | |
f684960e CW |
2381 | kfree(edid); |
2382 | } | |
a9756bb5 ZW |
2383 | } |
2384 | ||
d63885da PZ |
2385 | if (intel_encoder->type != INTEL_OUTPUT_EDP) |
2386 | intel_encoder->type = INTEL_OUTPUT_DISPLAYPORT; | |
a9756bb5 | 2387 | return connector_status_connected; |
a4fc5ed6 KP |
2388 | } |
2389 | ||
2390 | static int intel_dp_get_modes(struct drm_connector *connector) | |
2391 | { | |
df0e9248 | 2392 | struct intel_dp *intel_dp = intel_attached_dp(connector); |
dd06f90e | 2393 | struct intel_connector *intel_connector = to_intel_connector(connector); |
fa90ecef | 2394 | struct drm_device *dev = connector->dev; |
32f9d658 | 2395 | int ret; |
a4fc5ed6 KP |
2396 | |
2397 | /* We should parse the EDID data and find out if it has an audio sink | |
2398 | */ | |
2399 | ||
8c241fef | 2400 | ret = intel_dp_get_edid_modes(connector, &intel_dp->adapter); |
f8779fda | 2401 | if (ret) |
32f9d658 ZW |
2402 | return ret; |
2403 | ||
f8779fda | 2404 | /* if eDP has no EDID, fall back to fixed mode */ |
dd06f90e | 2405 | if (is_edp(intel_dp) && intel_connector->panel.fixed_mode) { |
f8779fda | 2406 | struct drm_display_mode *mode; |
dd06f90e JN |
2407 | mode = drm_mode_duplicate(dev, |
2408 | intel_connector->panel.fixed_mode); | |
f8779fda | 2409 | if (mode) { |
32f9d658 ZW |
2410 | drm_mode_probed_add(connector, mode); |
2411 | return 1; | |
2412 | } | |
2413 | } | |
2414 | return 0; | |
a4fc5ed6 KP |
2415 | } |
2416 | ||
1aad7ac0 CW |
2417 | static bool |
2418 | intel_dp_detect_audio(struct drm_connector *connector) | |
2419 | { | |
2420 | struct intel_dp *intel_dp = intel_attached_dp(connector); | |
2421 | struct edid *edid; | |
2422 | bool has_audio = false; | |
2423 | ||
8c241fef | 2424 | edid = intel_dp_get_edid(connector, &intel_dp->adapter); |
1aad7ac0 CW |
2425 | if (edid) { |
2426 | has_audio = drm_detect_monitor_audio(edid); | |
1aad7ac0 CW |
2427 | kfree(edid); |
2428 | } | |
2429 | ||
2430 | return has_audio; | |
2431 | } | |
2432 | ||
f684960e CW |
2433 | static int |
2434 | intel_dp_set_property(struct drm_connector *connector, | |
2435 | struct drm_property *property, | |
2436 | uint64_t val) | |
2437 | { | |
e953fd7b | 2438 | struct drm_i915_private *dev_priv = connector->dev->dev_private; |
53b41837 | 2439 | struct intel_connector *intel_connector = to_intel_connector(connector); |
da63a9f2 PZ |
2440 | struct intel_encoder *intel_encoder = intel_attached_encoder(connector); |
2441 | struct intel_dp *intel_dp = enc_to_intel_dp(&intel_encoder->base); | |
f684960e CW |
2442 | int ret; |
2443 | ||
662595df | 2444 | ret = drm_object_property_set_value(&connector->base, property, val); |
f684960e CW |
2445 | if (ret) |
2446 | return ret; | |
2447 | ||
3f43c48d | 2448 | if (property == dev_priv->force_audio_property) { |
1aad7ac0 CW |
2449 | int i = val; |
2450 | bool has_audio; | |
2451 | ||
2452 | if (i == intel_dp->force_audio) | |
f684960e CW |
2453 | return 0; |
2454 | ||
1aad7ac0 | 2455 | intel_dp->force_audio = i; |
f684960e | 2456 | |
c3e5f67b | 2457 | if (i == HDMI_AUDIO_AUTO) |
1aad7ac0 CW |
2458 | has_audio = intel_dp_detect_audio(connector); |
2459 | else | |
c3e5f67b | 2460 | has_audio = (i == HDMI_AUDIO_ON); |
1aad7ac0 CW |
2461 | |
2462 | if (has_audio == intel_dp->has_audio) | |
f684960e CW |
2463 | return 0; |
2464 | ||
1aad7ac0 | 2465 | intel_dp->has_audio = has_audio; |
f684960e CW |
2466 | goto done; |
2467 | } | |
2468 | ||
e953fd7b CW |
2469 | if (property == dev_priv->broadcast_rgb_property) { |
2470 | if (val == !!intel_dp->color_range) | |
2471 | return 0; | |
2472 | ||
2473 | intel_dp->color_range = val ? DP_COLOR_RANGE_16_235 : 0; | |
2474 | goto done; | |
2475 | } | |
2476 | ||
53b41837 YN |
2477 | if (is_edp(intel_dp) && |
2478 | property == connector->dev->mode_config.scaling_mode_property) { | |
2479 | if (val == DRM_MODE_SCALE_NONE) { | |
2480 | DRM_DEBUG_KMS("no scaling not supported\n"); | |
2481 | return -EINVAL; | |
2482 | } | |
2483 | ||
2484 | if (intel_connector->panel.fitting_mode == val) { | |
2485 | /* the eDP scaling property is not changed */ | |
2486 | return 0; | |
2487 | } | |
2488 | intel_connector->panel.fitting_mode = val; | |
2489 | ||
2490 | goto done; | |
2491 | } | |
2492 | ||
f684960e CW |
2493 | return -EINVAL; |
2494 | ||
2495 | done: | |
da63a9f2 PZ |
2496 | if (intel_encoder->base.crtc) { |
2497 | struct drm_crtc *crtc = intel_encoder->base.crtc; | |
a6778b3c DV |
2498 | intel_set_mode(crtc, &crtc->mode, |
2499 | crtc->x, crtc->y, crtc->fb); | |
f684960e CW |
2500 | } |
2501 | ||
2502 | return 0; | |
2503 | } | |
2504 | ||
a4fc5ed6 | 2505 | static void |
0206e353 | 2506 | intel_dp_destroy(struct drm_connector *connector) |
a4fc5ed6 | 2507 | { |
aaa6fd2a | 2508 | struct drm_device *dev = connector->dev; |
be3cd5e3 | 2509 | struct intel_dp *intel_dp = intel_attached_dp(connector); |
1d508706 | 2510 | struct intel_connector *intel_connector = to_intel_connector(connector); |
aaa6fd2a | 2511 | |
9cd300e0 JN |
2512 | if (!IS_ERR_OR_NULL(intel_connector->edid)) |
2513 | kfree(intel_connector->edid); | |
2514 | ||
1d508706 | 2515 | if (is_edp(intel_dp)) { |
aaa6fd2a | 2516 | intel_panel_destroy_backlight(dev); |
1d508706 JN |
2517 | intel_panel_fini(&intel_connector->panel); |
2518 | } | |
aaa6fd2a | 2519 | |
a4fc5ed6 KP |
2520 | drm_sysfs_connector_remove(connector); |
2521 | drm_connector_cleanup(connector); | |
55f78c43 | 2522 | kfree(connector); |
a4fc5ed6 KP |
2523 | } |
2524 | ||
00c09d70 | 2525 | void intel_dp_encoder_destroy(struct drm_encoder *encoder) |
24d05927 | 2526 | { |
da63a9f2 PZ |
2527 | struct intel_digital_port *intel_dig_port = enc_to_dig_port(encoder); |
2528 | struct intel_dp *intel_dp = &intel_dig_port->dp; | |
24d05927 DV |
2529 | |
2530 | i2c_del_adapter(&intel_dp->adapter); | |
2531 | drm_encoder_cleanup(encoder); | |
bd943159 KP |
2532 | if (is_edp(intel_dp)) { |
2533 | cancel_delayed_work_sync(&intel_dp->panel_vdd_work); | |
2534 | ironlake_panel_vdd_off_sync(intel_dp); | |
2535 | } | |
da63a9f2 | 2536 | kfree(intel_dig_port); |
24d05927 DV |
2537 | } |
2538 | ||
a4fc5ed6 | 2539 | static const struct drm_encoder_helper_funcs intel_dp_helper_funcs = { |
a4fc5ed6 | 2540 | .mode_fixup = intel_dp_mode_fixup, |
a4fc5ed6 | 2541 | .mode_set = intel_dp_mode_set, |
1f703855 | 2542 | .disable = intel_encoder_noop, |
a4fc5ed6 KP |
2543 | }; |
2544 | ||
2545 | static const struct drm_connector_funcs intel_dp_connector_funcs = { | |
2bd2ad64 | 2546 | .dpms = intel_connector_dpms, |
a4fc5ed6 KP |
2547 | .detect = intel_dp_detect, |
2548 | .fill_modes = drm_helper_probe_single_connector_modes, | |
f684960e | 2549 | .set_property = intel_dp_set_property, |
a4fc5ed6 KP |
2550 | .destroy = intel_dp_destroy, |
2551 | }; | |
2552 | ||
2553 | static const struct drm_connector_helper_funcs intel_dp_connector_helper_funcs = { | |
2554 | .get_modes = intel_dp_get_modes, | |
2555 | .mode_valid = intel_dp_mode_valid, | |
df0e9248 | 2556 | .best_encoder = intel_best_encoder, |
a4fc5ed6 KP |
2557 | }; |
2558 | ||
a4fc5ed6 | 2559 | static const struct drm_encoder_funcs intel_dp_enc_funcs = { |
24d05927 | 2560 | .destroy = intel_dp_encoder_destroy, |
a4fc5ed6 KP |
2561 | }; |
2562 | ||
995b6762 | 2563 | static void |
21d40d37 | 2564 | intel_dp_hot_plug(struct intel_encoder *intel_encoder) |
c8110e52 | 2565 | { |
fa90ecef | 2566 | struct intel_dp *intel_dp = enc_to_intel_dp(&intel_encoder->base); |
c8110e52 | 2567 | |
885a5014 | 2568 | intel_dp_check_link_status(intel_dp); |
c8110e52 | 2569 | } |
6207937d | 2570 | |
e3421a18 ZW |
2571 | /* Return which DP Port should be selected for Transcoder DP control */ |
2572 | int | |
0206e353 | 2573 | intel_trans_dp_port_sel(struct drm_crtc *crtc) |
e3421a18 ZW |
2574 | { |
2575 | struct drm_device *dev = crtc->dev; | |
fa90ecef PZ |
2576 | struct intel_encoder *intel_encoder; |
2577 | struct intel_dp *intel_dp; | |
e3421a18 | 2578 | |
fa90ecef PZ |
2579 | for_each_encoder_on_crtc(dev, crtc, intel_encoder) { |
2580 | intel_dp = enc_to_intel_dp(&intel_encoder->base); | |
e3421a18 | 2581 | |
fa90ecef PZ |
2582 | if (intel_encoder->type == INTEL_OUTPUT_DISPLAYPORT || |
2583 | intel_encoder->type == INTEL_OUTPUT_EDP) | |
ea5b213a | 2584 | return intel_dp->output_reg; |
e3421a18 | 2585 | } |
ea5b213a | 2586 | |
e3421a18 ZW |
2587 | return -1; |
2588 | } | |
2589 | ||
36e83a18 | 2590 | /* check the VBT to see whether the eDP is on DP-D port */ |
cb0953d7 | 2591 | bool intel_dpd_is_edp(struct drm_device *dev) |
36e83a18 ZY |
2592 | { |
2593 | struct drm_i915_private *dev_priv = dev->dev_private; | |
2594 | struct child_device_config *p_child; | |
2595 | int i; | |
2596 | ||
2597 | if (!dev_priv->child_dev_num) | |
2598 | return false; | |
2599 | ||
2600 | for (i = 0; i < dev_priv->child_dev_num; i++) { | |
2601 | p_child = dev_priv->child_dev + i; | |
2602 | ||
2603 | if (p_child->dvo_port == PORT_IDPD && | |
2604 | p_child->device_type == DEVICE_TYPE_eDP) | |
2605 | return true; | |
2606 | } | |
2607 | return false; | |
2608 | } | |
2609 | ||
f684960e CW |
2610 | static void |
2611 | intel_dp_add_properties(struct intel_dp *intel_dp, struct drm_connector *connector) | |
2612 | { | |
53b41837 YN |
2613 | struct intel_connector *intel_connector = to_intel_connector(connector); |
2614 | ||
3f43c48d | 2615 | intel_attach_force_audio_property(connector); |
e953fd7b | 2616 | intel_attach_broadcast_rgb_property(connector); |
53b41837 YN |
2617 | |
2618 | if (is_edp(intel_dp)) { | |
2619 | drm_mode_create_scaling_mode_property(connector->dev); | |
2620 | drm_connector_attach_property( | |
2621 | connector, | |
2622 | connector->dev->mode_config.scaling_mode_property, | |
8e740cd1 YN |
2623 | DRM_MODE_SCALE_ASPECT); |
2624 | intel_connector->panel.fitting_mode = DRM_MODE_SCALE_ASPECT; | |
53b41837 | 2625 | } |
f684960e CW |
2626 | } |
2627 | ||
67a54566 DV |
2628 | static void |
2629 | intel_dp_init_panel_power_sequencer(struct drm_device *dev, | |
2630 | struct intel_dp *intel_dp) | |
2631 | { | |
2632 | struct drm_i915_private *dev_priv = dev->dev_private; | |
2633 | struct edp_power_seq cur, vbt, spec, final; | |
2634 | u32 pp_on, pp_off, pp_div, pp; | |
2635 | ||
2636 | /* Workaround: Need to write PP_CONTROL with the unlock key as | |
2637 | * the very first thing. */ | |
2638 | pp = ironlake_get_pp_control(dev_priv); | |
2639 | I915_WRITE(PCH_PP_CONTROL, pp); | |
2640 | ||
2641 | pp_on = I915_READ(PCH_PP_ON_DELAYS); | |
2642 | pp_off = I915_READ(PCH_PP_OFF_DELAYS); | |
2643 | pp_div = I915_READ(PCH_PP_DIVISOR); | |
2644 | ||
2645 | /* Pull timing values out of registers */ | |
2646 | cur.t1_t3 = (pp_on & PANEL_POWER_UP_DELAY_MASK) >> | |
2647 | PANEL_POWER_UP_DELAY_SHIFT; | |
2648 | ||
2649 | cur.t8 = (pp_on & PANEL_LIGHT_ON_DELAY_MASK) >> | |
2650 | PANEL_LIGHT_ON_DELAY_SHIFT; | |
2651 | ||
2652 | cur.t9 = (pp_off & PANEL_LIGHT_OFF_DELAY_MASK) >> | |
2653 | PANEL_LIGHT_OFF_DELAY_SHIFT; | |
2654 | ||
2655 | cur.t10 = (pp_off & PANEL_POWER_DOWN_DELAY_MASK) >> | |
2656 | PANEL_POWER_DOWN_DELAY_SHIFT; | |
2657 | ||
2658 | cur.t11_t12 = ((pp_div & PANEL_POWER_CYCLE_DELAY_MASK) >> | |
2659 | PANEL_POWER_CYCLE_DELAY_SHIFT) * 1000; | |
2660 | ||
2661 | DRM_DEBUG_KMS("cur t1_t3 %d t8 %d t9 %d t10 %d t11_t12 %d\n", | |
2662 | cur.t1_t3, cur.t8, cur.t9, cur.t10, cur.t11_t12); | |
2663 | ||
2664 | vbt = dev_priv->edp.pps; | |
2665 | ||
2666 | /* Upper limits from eDP 1.3 spec. Note that we use the clunky units of | |
2667 | * our hw here, which are all in 100usec. */ | |
2668 | spec.t1_t3 = 210 * 10; | |
2669 | spec.t8 = 50 * 10; /* no limit for t8, use t7 instead */ | |
2670 | spec.t9 = 50 * 10; /* no limit for t9, make it symmetric with t8 */ | |
2671 | spec.t10 = 500 * 10; | |
2672 | /* This one is special and actually in units of 100ms, but zero | |
2673 | * based in the hw (so we need to add 100 ms). But the sw vbt | |
2674 | * table multiplies it with 1000 to make it in units of 100usec, | |
2675 | * too. */ | |
2676 | spec.t11_t12 = (510 + 100) * 10; | |
2677 | ||
2678 | DRM_DEBUG_KMS("vbt t1_t3 %d t8 %d t9 %d t10 %d t11_t12 %d\n", | |
2679 | vbt.t1_t3, vbt.t8, vbt.t9, vbt.t10, vbt.t11_t12); | |
2680 | ||
2681 | /* Use the max of the register settings and vbt. If both are | |
2682 | * unset, fall back to the spec limits. */ | |
2683 | #define assign_final(field) final.field = (max(cur.field, vbt.field) == 0 ? \ | |
2684 | spec.field : \ | |
2685 | max(cur.field, vbt.field)) | |
2686 | assign_final(t1_t3); | |
2687 | assign_final(t8); | |
2688 | assign_final(t9); | |
2689 | assign_final(t10); | |
2690 | assign_final(t11_t12); | |
2691 | #undef assign_final | |
2692 | ||
2693 | #define get_delay(field) (DIV_ROUND_UP(final.field, 10)) | |
2694 | intel_dp->panel_power_up_delay = get_delay(t1_t3); | |
2695 | intel_dp->backlight_on_delay = get_delay(t8); | |
2696 | intel_dp->backlight_off_delay = get_delay(t9); | |
2697 | intel_dp->panel_power_down_delay = get_delay(t10); | |
2698 | intel_dp->panel_power_cycle_delay = get_delay(t11_t12); | |
2699 | #undef get_delay | |
2700 | ||
2701 | /* And finally store the new values in the power sequencer. */ | |
2702 | pp_on = (final.t1_t3 << PANEL_POWER_UP_DELAY_SHIFT) | | |
2703 | (final.t8 << PANEL_LIGHT_ON_DELAY_SHIFT); | |
2704 | pp_off = (final.t9 << PANEL_LIGHT_OFF_DELAY_SHIFT) | | |
2705 | (final.t10 << PANEL_POWER_DOWN_DELAY_SHIFT); | |
2706 | /* Compute the divisor for the pp clock, simply match the Bspec | |
2707 | * formula. */ | |
2708 | pp_div = ((100 * intel_pch_rawclk(dev))/2 - 1) | |
2709 | << PP_REFERENCE_DIVIDER_SHIFT; | |
2710 | pp_div |= (DIV_ROUND_UP(final.t11_t12, 1000) | |
2711 | << PANEL_POWER_CYCLE_DELAY_SHIFT); | |
2712 | ||
2713 | /* Haswell doesn't have any port selection bits for the panel | |
2714 | * power sequencer any more. */ | |
2715 | if (HAS_PCH_IBX(dev) || HAS_PCH_CPT(dev)) { | |
2716 | if (is_cpu_edp(intel_dp)) | |
2717 | pp_on |= PANEL_POWER_PORT_DP_A; | |
2718 | else | |
2719 | pp_on |= PANEL_POWER_PORT_DP_D; | |
2720 | } | |
2721 | ||
2722 | I915_WRITE(PCH_PP_ON_DELAYS, pp_on); | |
2723 | I915_WRITE(PCH_PP_OFF_DELAYS, pp_off); | |
2724 | I915_WRITE(PCH_PP_DIVISOR, pp_div); | |
2725 | ||
2726 | ||
2727 | DRM_DEBUG_KMS("panel power up delay %d, power down delay %d, power cycle delay %d\n", | |
2728 | intel_dp->panel_power_up_delay, intel_dp->panel_power_down_delay, | |
2729 | intel_dp->panel_power_cycle_delay); | |
2730 | ||
2731 | DRM_DEBUG_KMS("backlight on delay %d, off delay %d\n", | |
2732 | intel_dp->backlight_on_delay, intel_dp->backlight_off_delay); | |
2733 | ||
2734 | DRM_DEBUG_KMS("panel power sequencer register settings: PP_ON %#x, PP_OFF %#x, PP_DIV %#x\n", | |
2735 | I915_READ(PCH_PP_ON_DELAYS), | |
2736 | I915_READ(PCH_PP_OFF_DELAYS), | |
2737 | I915_READ(PCH_PP_DIVISOR)); | |
f684960e CW |
2738 | } |
2739 | ||
a4fc5ed6 | 2740 | void |
f0fec3f2 PZ |
2741 | intel_dp_init_connector(struct intel_digital_port *intel_dig_port, |
2742 | struct intel_connector *intel_connector) | |
a4fc5ed6 | 2743 | { |
f0fec3f2 PZ |
2744 | struct drm_connector *connector = &intel_connector->base; |
2745 | struct intel_dp *intel_dp = &intel_dig_port->dp; | |
2746 | struct intel_encoder *intel_encoder = &intel_dig_port->base; | |
2747 | struct drm_device *dev = intel_encoder->base.dev; | |
a4fc5ed6 | 2748 | struct drm_i915_private *dev_priv = dev->dev_private; |
f8779fda | 2749 | struct drm_display_mode *fixed_mode = NULL; |
174edf1f | 2750 | enum port port = intel_dig_port->port; |
5eb08b69 | 2751 | const char *name = NULL; |
b329530c | 2752 | int type; |
a4fc5ed6 | 2753 | |
0767935e DV |
2754 | /* Preserve the current hw state. */ |
2755 | intel_dp->DP = I915_READ(intel_dp->output_reg); | |
dd06f90e | 2756 | intel_dp->attached_connector = intel_connector; |
3d3dc149 | 2757 | |
f0fec3f2 | 2758 | if (HAS_PCH_SPLIT(dev) && port == PORT_D) |
b329530c | 2759 | if (intel_dpd_is_edp(dev)) |
ea5b213a | 2760 | intel_dp->is_pch_edp = true; |
b329530c | 2761 | |
19c03924 GB |
2762 | /* |
2763 | * FIXME : We need to initialize built-in panels before external panels. | |
2764 | * For X0, DP_C is fixed as eDP. Revisit this as part of VLV eDP cleanup | |
2765 | */ | |
f0fec3f2 | 2766 | if (IS_VALLEYVIEW(dev) && port == PORT_C) { |
19c03924 GB |
2767 | type = DRM_MODE_CONNECTOR_eDP; |
2768 | intel_encoder->type = INTEL_OUTPUT_EDP; | |
f0fec3f2 | 2769 | } else if (port == PORT_A || is_pch_edp(intel_dp)) { |
b329530c AJ |
2770 | type = DRM_MODE_CONNECTOR_eDP; |
2771 | intel_encoder->type = INTEL_OUTPUT_EDP; | |
2772 | } else { | |
00c09d70 PZ |
2773 | /* The intel_encoder->type value may be INTEL_OUTPUT_UNKNOWN for |
2774 | * DDI or INTEL_OUTPUT_DISPLAYPORT for the older gens, so don't | |
2775 | * rewrite it. | |
2776 | */ | |
b329530c | 2777 | type = DRM_MODE_CONNECTOR_DisplayPort; |
b329530c AJ |
2778 | } |
2779 | ||
b329530c | 2780 | drm_connector_init(dev, connector, &intel_dp_connector_funcs, type); |
a4fc5ed6 KP |
2781 | drm_connector_helper_add(connector, &intel_dp_connector_helper_funcs); |
2782 | ||
eb1f8e4f | 2783 | connector->polled = DRM_CONNECTOR_POLL_HPD; |
a4fc5ed6 KP |
2784 | connector->interlace_allowed = true; |
2785 | connector->doublescan_allowed = 0; | |
2786 | ||
f0fec3f2 PZ |
2787 | INIT_DELAYED_WORK(&intel_dp->panel_vdd_work, |
2788 | ironlake_panel_vdd_work); | |
a4fc5ed6 | 2789 | |
df0e9248 | 2790 | intel_connector_attach_encoder(intel_connector, intel_encoder); |
a4fc5ed6 KP |
2791 | drm_sysfs_connector_add(connector); |
2792 | ||
affa9354 | 2793 | if (HAS_DDI(dev)) |
bcbc889b PZ |
2794 | intel_connector->get_hw_state = intel_ddi_connector_get_hw_state; |
2795 | else | |
2796 | intel_connector->get_hw_state = intel_connector_get_hw_state; | |
2797 | ||
e8cb4558 | 2798 | |
a4fc5ed6 | 2799 | /* Set up the DDC bus. */ |
ab9d7c30 PZ |
2800 | switch (port) { |
2801 | case PORT_A: | |
2802 | name = "DPDDC-A"; | |
2803 | break; | |
2804 | case PORT_B: | |
2805 | dev_priv->hotplug_supported_mask |= DPB_HOTPLUG_INT_STATUS; | |
2806 | name = "DPDDC-B"; | |
2807 | break; | |
2808 | case PORT_C: | |
2809 | dev_priv->hotplug_supported_mask |= DPC_HOTPLUG_INT_STATUS; | |
2810 | name = "DPDDC-C"; | |
2811 | break; | |
2812 | case PORT_D: | |
2813 | dev_priv->hotplug_supported_mask |= DPD_HOTPLUG_INT_STATUS; | |
2814 | name = "DPDDC-D"; | |
2815 | break; | |
2816 | default: | |
2817 | WARN(1, "Invalid port %c\n", port_name(port)); | |
2818 | break; | |
5eb08b69 ZW |
2819 | } |
2820 | ||
67a54566 DV |
2821 | if (is_edp(intel_dp)) |
2822 | intel_dp_init_panel_power_sequencer(dev, intel_dp); | |
c1f05264 DA |
2823 | |
2824 | intel_dp_i2c_init(intel_dp, intel_connector, name); | |
2825 | ||
67a54566 | 2826 | /* Cache DPCD and EDID for edp. */ |
c1f05264 DA |
2827 | if (is_edp(intel_dp)) { |
2828 | bool ret; | |
f8779fda | 2829 | struct drm_display_mode *scan; |
c1f05264 | 2830 | struct edid *edid; |
5d613501 JB |
2831 | |
2832 | ironlake_edp_panel_vdd_on(intel_dp); | |
59f3e272 | 2833 | ret = intel_dp_get_dpcd(intel_dp); |
bd943159 | 2834 | ironlake_edp_panel_vdd_off(intel_dp, false); |
99ea7127 | 2835 | |
59f3e272 | 2836 | if (ret) { |
7183dc29 JB |
2837 | if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11) |
2838 | dev_priv->no_aux_handshake = | |
2839 | intel_dp->dpcd[DP_MAX_DOWNSPREAD] & | |
89667383 JB |
2840 | DP_NO_AUX_HANDSHAKE_LINK_TRAINING; |
2841 | } else { | |
3d3dc149 | 2842 | /* if this fails, presume the device is a ghost */ |
48898b03 | 2843 | DRM_INFO("failed to retrieve link info, disabling eDP\n"); |
fa90ecef PZ |
2844 | intel_dp_encoder_destroy(&intel_encoder->base); |
2845 | intel_dp_destroy(connector); | |
3d3dc149 | 2846 | return; |
89667383 | 2847 | } |
89667383 | 2848 | |
d6f24d0f JB |
2849 | ironlake_edp_panel_vdd_on(intel_dp); |
2850 | edid = drm_get_edid(connector, &intel_dp->adapter); | |
2851 | if (edid) { | |
9cd300e0 JN |
2852 | if (drm_add_edid_modes(connector, edid)) { |
2853 | drm_mode_connector_update_edid_property(connector, edid); | |
2854 | drm_edid_to_eld(connector, edid); | |
2855 | } else { | |
2856 | kfree(edid); | |
2857 | edid = ERR_PTR(-EINVAL); | |
2858 | } | |
2859 | } else { | |
2860 | edid = ERR_PTR(-ENOENT); | |
d6f24d0f | 2861 | } |
9cd300e0 | 2862 | intel_connector->edid = edid; |
f8779fda JN |
2863 | |
2864 | /* prefer fixed mode from EDID if available */ | |
2865 | list_for_each_entry(scan, &connector->probed_modes, head) { | |
2866 | if ((scan->type & DRM_MODE_TYPE_PREFERRED)) { | |
2867 | fixed_mode = drm_mode_duplicate(dev, scan); | |
2868 | break; | |
2869 | } | |
d6f24d0f | 2870 | } |
f8779fda JN |
2871 | |
2872 | /* fallback to VBT if available for eDP */ | |
2873 | if (!fixed_mode && dev_priv->lfp_lvds_vbt_mode) { | |
2874 | fixed_mode = drm_mode_duplicate(dev, dev_priv->lfp_lvds_vbt_mode); | |
2875 | if (fixed_mode) | |
2876 | fixed_mode->type |= DRM_MODE_TYPE_PREFERRED; | |
2877 | } | |
f8779fda | 2878 | |
d6f24d0f JB |
2879 | ironlake_edp_panel_vdd_off(intel_dp, false); |
2880 | } | |
552fb0b7 | 2881 | |
4d926461 | 2882 | if (is_edp(intel_dp)) { |
dd06f90e | 2883 | intel_panel_init(&intel_connector->panel, fixed_mode); |
0657b6b1 | 2884 | intel_panel_setup_backlight(connector); |
32f9d658 ZW |
2885 | } |
2886 | ||
f684960e CW |
2887 | intel_dp_add_properties(intel_dp, connector); |
2888 | ||
a4fc5ed6 KP |
2889 | /* For G4X desktop chip, PEG_BAND_GAP_DATA 3:0 must first be written |
2890 | * 0xd. Failure to do so will result in spurious interrupts being | |
2891 | * generated on the port when a cable is not attached. | |
2892 | */ | |
2893 | if (IS_G4X(dev) && !IS_GM45(dev)) { | |
2894 | u32 temp = I915_READ(PEG_BAND_GAP_DATA); | |
2895 | I915_WRITE(PEG_BAND_GAP_DATA, (temp & ~0xf) | 0xd); | |
2896 | } | |
2897 | } | |
f0fec3f2 PZ |
2898 | |
2899 | void | |
2900 | intel_dp_init(struct drm_device *dev, int output_reg, enum port port) | |
2901 | { | |
2902 | struct intel_digital_port *intel_dig_port; | |
2903 | struct intel_encoder *intel_encoder; | |
2904 | struct drm_encoder *encoder; | |
2905 | struct intel_connector *intel_connector; | |
2906 | ||
2907 | intel_dig_port = kzalloc(sizeof(struct intel_digital_port), GFP_KERNEL); | |
2908 | if (!intel_dig_port) | |
2909 | return; | |
2910 | ||
2911 | intel_connector = kzalloc(sizeof(struct intel_connector), GFP_KERNEL); | |
2912 | if (!intel_connector) { | |
2913 | kfree(intel_dig_port); | |
2914 | return; | |
2915 | } | |
2916 | ||
2917 | intel_encoder = &intel_dig_port->base; | |
2918 | encoder = &intel_encoder->base; | |
2919 | ||
2920 | drm_encoder_init(dev, &intel_encoder->base, &intel_dp_enc_funcs, | |
2921 | DRM_MODE_ENCODER_TMDS); | |
00c09d70 | 2922 | drm_encoder_helper_add(&intel_encoder->base, &intel_dp_helper_funcs); |
f0fec3f2 | 2923 | |
00c09d70 PZ |
2924 | intel_encoder->enable = intel_enable_dp; |
2925 | intel_encoder->pre_enable = intel_pre_enable_dp; | |
2926 | intel_encoder->disable = intel_disable_dp; | |
2927 | intel_encoder->post_disable = intel_post_disable_dp; | |
2928 | intel_encoder->get_hw_state = intel_dp_get_hw_state; | |
f0fec3f2 | 2929 | |
174edf1f | 2930 | intel_dig_port->port = port; |
f0fec3f2 PZ |
2931 | intel_dig_port->dp.output_reg = output_reg; |
2932 | ||
00c09d70 | 2933 | intel_encoder->type = INTEL_OUTPUT_DISPLAYPORT; |
f0fec3f2 PZ |
2934 | intel_encoder->crtc_mask = (1 << 0) | (1 << 1) | (1 << 2); |
2935 | intel_encoder->cloneable = false; | |
2936 | intel_encoder->hot_plug = intel_dp_hot_plug; | |
2937 | ||
2938 | intel_dp_init_connector(intel_dig_port, intel_connector); | |
2939 | } |