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a4fc5ed6 KP |
1 | /* |
2 | * Copyright © 2008 Intel Corporation | |
3 | * | |
4 | * Permission is hereby granted, free of charge, to any person obtaining a | |
5 | * copy of this software and associated documentation files (the "Software"), | |
6 | * to deal in the Software without restriction, including without limitation | |
7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
8 | * and/or sell copies of the Software, and to permit persons to whom the | |
9 | * Software is furnished to do so, subject to the following conditions: | |
10 | * | |
11 | * The above copyright notice and this permission notice (including the next | |
12 | * paragraph) shall be included in all copies or substantial portions of the | |
13 | * Software. | |
14 | * | |
15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
18 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING | |
20 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS | |
21 | * IN THE SOFTWARE. | |
22 | * | |
23 | * Authors: | |
24 | * Keith Packard <keithp@keithp.com> | |
25 | * | |
26 | */ | |
27 | ||
28 | #include <linux/i2c.h> | |
5a0e3ad6 | 29 | #include <linux/slab.h> |
2d1a8a48 | 30 | #include <linux/export.h> |
a4fc5ed6 KP |
31 | #include "drmP.h" |
32 | #include "drm.h" | |
33 | #include "drm_crtc.h" | |
34 | #include "drm_crtc_helper.h" | |
d6f24d0f | 35 | #include "drm_edid.h" |
a4fc5ed6 KP |
36 | #include "intel_drv.h" |
37 | #include "i915_drm.h" | |
38 | #include "i915_drv.h" | |
a4fc5ed6 KP |
39 | |
40 | #define DP_LINK_STATUS_SIZE 6 | |
41 | #define DP_LINK_CHECK_TIMEOUT (10 * 1000) | |
42 | ||
cfcb0fc9 JB |
43 | /** |
44 | * is_edp - is the given port attached to an eDP panel (either CPU or PCH) | |
45 | * @intel_dp: DP struct | |
46 | * | |
47 | * If a CPU or PCH DP output is attached to an eDP panel, this function | |
48 | * will return true, and false otherwise. | |
49 | */ | |
50 | static bool is_edp(struct intel_dp *intel_dp) | |
51 | { | |
52 | return intel_dp->base.type == INTEL_OUTPUT_EDP; | |
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 | ||
ea5b213a CW |
79 | static struct intel_dp *enc_to_intel_dp(struct drm_encoder *encoder) |
80 | { | |
4ef69c7a | 81 | return container_of(encoder, struct intel_dp, base.base); |
ea5b213a | 82 | } |
a4fc5ed6 | 83 | |
df0e9248 CW |
84 | static struct intel_dp *intel_attached_dp(struct drm_connector *connector) |
85 | { | |
86 | return container_of(intel_attached_encoder(connector), | |
87 | struct intel_dp, base); | |
88 | } | |
89 | ||
814948ad JB |
90 | /** |
91 | * intel_encoder_is_pch_edp - is the given encoder a PCH attached eDP? | |
92 | * @encoder: DRM encoder | |
93 | * | |
94 | * Return true if @encoder corresponds to a PCH attached eDP panel. Needed | |
95 | * by intel_display.c. | |
96 | */ | |
97 | bool intel_encoder_is_pch_edp(struct drm_encoder *encoder) | |
98 | { | |
99 | struct intel_dp *intel_dp; | |
100 | ||
101 | if (!encoder) | |
102 | return false; | |
103 | ||
104 | intel_dp = enc_to_intel_dp(encoder); | |
105 | ||
106 | return is_pch_edp(intel_dp); | |
107 | } | |
108 | ||
33a34e4e JB |
109 | static void intel_dp_start_link_train(struct intel_dp *intel_dp); |
110 | static void intel_dp_complete_link_train(struct intel_dp *intel_dp); | |
ea5b213a | 111 | static void intel_dp_link_down(struct intel_dp *intel_dp); |
a4fc5ed6 | 112 | |
32f9d658 | 113 | void |
0206e353 | 114 | intel_edp_link_config(struct intel_encoder *intel_encoder, |
ea5b213a | 115 | int *lane_num, int *link_bw) |
32f9d658 | 116 | { |
ea5b213a | 117 | struct intel_dp *intel_dp = container_of(intel_encoder, struct intel_dp, base); |
32f9d658 | 118 | |
ea5b213a CW |
119 | *lane_num = intel_dp->lane_count; |
120 | if (intel_dp->link_bw == DP_LINK_BW_1_62) | |
32f9d658 | 121 | *link_bw = 162000; |
ea5b213a | 122 | else if (intel_dp->link_bw == DP_LINK_BW_2_7) |
32f9d658 ZW |
123 | *link_bw = 270000; |
124 | } | |
125 | ||
94bf2ced DV |
126 | int |
127 | intel_edp_target_clock(struct intel_encoder *intel_encoder, | |
128 | struct drm_display_mode *mode) | |
129 | { | |
130 | struct intel_dp *intel_dp = container_of(intel_encoder, struct intel_dp, base); | |
131 | ||
132 | if (intel_dp->panel_fixed_mode) | |
133 | return intel_dp->panel_fixed_mode->clock; | |
134 | else | |
135 | return mode->clock; | |
136 | } | |
137 | ||
a4fc5ed6 | 138 | static int |
ea5b213a | 139 | intel_dp_max_lane_count(struct intel_dp *intel_dp) |
a4fc5ed6 | 140 | { |
9a10f401 KP |
141 | int max_lane_count = intel_dp->dpcd[DP_MAX_LANE_COUNT] & 0x1f; |
142 | switch (max_lane_count) { | |
143 | case 1: case 2: case 4: | |
144 | break; | |
145 | default: | |
146 | max_lane_count = 4; | |
a4fc5ed6 KP |
147 | } |
148 | return max_lane_count; | |
149 | } | |
150 | ||
151 | static int | |
ea5b213a | 152 | intel_dp_max_link_bw(struct intel_dp *intel_dp) |
a4fc5ed6 | 153 | { |
7183dc29 | 154 | int max_link_bw = intel_dp->dpcd[DP_MAX_LINK_RATE]; |
a4fc5ed6 KP |
155 | |
156 | switch (max_link_bw) { | |
157 | case DP_LINK_BW_1_62: | |
158 | case DP_LINK_BW_2_7: | |
159 | break; | |
160 | default: | |
161 | max_link_bw = DP_LINK_BW_1_62; | |
162 | break; | |
163 | } | |
164 | return max_link_bw; | |
165 | } | |
166 | ||
167 | static int | |
168 | intel_dp_link_clock(uint8_t link_bw) | |
169 | { | |
170 | if (link_bw == DP_LINK_BW_2_7) | |
171 | return 270000; | |
172 | else | |
173 | return 162000; | |
174 | } | |
175 | ||
cd9dde44 AJ |
176 | /* |
177 | * The units on the numbers in the next two are... bizarre. Examples will | |
178 | * make it clearer; this one parallels an example in the eDP spec. | |
179 | * | |
180 | * intel_dp_max_data_rate for one lane of 2.7GHz evaluates as: | |
181 | * | |
182 | * 270000 * 1 * 8 / 10 == 216000 | |
183 | * | |
184 | * The actual data capacity of that configuration is 2.16Gbit/s, so the | |
185 | * units are decakilobits. ->clock in a drm_display_mode is in kilohertz - | |
186 | * or equivalently, kilopixels per second - so for 1680x1050R it'd be | |
187 | * 119000. At 18bpp that's 2142000 kilobits per second. | |
188 | * | |
189 | * Thus the strange-looking division by 10 in intel_dp_link_required, to | |
190 | * get the result in decakilobits instead of kilobits. | |
191 | */ | |
192 | ||
a4fc5ed6 | 193 | static int |
c898261c | 194 | intel_dp_link_required(int pixel_clock, int bpp) |
a4fc5ed6 | 195 | { |
cd9dde44 | 196 | return (pixel_clock * bpp + 9) / 10; |
a4fc5ed6 KP |
197 | } |
198 | ||
fe27d53e DA |
199 | static int |
200 | intel_dp_max_data_rate(int max_link_clock, int max_lanes) | |
201 | { | |
202 | return (max_link_clock * max_lanes * 8) / 10; | |
203 | } | |
204 | ||
c4867936 DV |
205 | static bool |
206 | intel_dp_adjust_dithering(struct intel_dp *intel_dp, | |
207 | struct drm_display_mode *mode, | |
cb1793ce | 208 | bool adjust_mode) |
c4867936 DV |
209 | { |
210 | int max_link_clock = intel_dp_link_clock(intel_dp_max_link_bw(intel_dp)); | |
211 | int max_lanes = intel_dp_max_lane_count(intel_dp); | |
212 | int max_rate, mode_rate; | |
213 | ||
214 | mode_rate = intel_dp_link_required(mode->clock, 24); | |
215 | max_rate = intel_dp_max_data_rate(max_link_clock, max_lanes); | |
216 | ||
217 | if (mode_rate > max_rate) { | |
218 | mode_rate = intel_dp_link_required(mode->clock, 18); | |
219 | if (mode_rate > max_rate) | |
220 | return false; | |
221 | ||
cb1793ce DV |
222 | if (adjust_mode) |
223 | mode->private_flags | |
c4867936 DV |
224 | |= INTEL_MODE_DP_FORCE_6BPC; |
225 | ||
226 | return true; | |
227 | } | |
228 | ||
229 | return true; | |
230 | } | |
231 | ||
a4fc5ed6 KP |
232 | static int |
233 | intel_dp_mode_valid(struct drm_connector *connector, | |
234 | struct drm_display_mode *mode) | |
235 | { | |
df0e9248 | 236 | struct intel_dp *intel_dp = intel_attached_dp(connector); |
a4fc5ed6 | 237 | |
d15456de KP |
238 | if (is_edp(intel_dp) && intel_dp->panel_fixed_mode) { |
239 | if (mode->hdisplay > intel_dp->panel_fixed_mode->hdisplay) | |
7de56f43 ZY |
240 | return MODE_PANEL; |
241 | ||
d15456de | 242 | if (mode->vdisplay > intel_dp->panel_fixed_mode->vdisplay) |
7de56f43 ZY |
243 | return MODE_PANEL; |
244 | } | |
245 | ||
cb1793ce | 246 | if (!intel_dp_adjust_dithering(intel_dp, mode, false)) |
c4867936 | 247 | return MODE_CLOCK_HIGH; |
a4fc5ed6 KP |
248 | |
249 | if (mode->clock < 10000) | |
250 | return MODE_CLOCK_LOW; | |
251 | ||
0af78a2b DV |
252 | if (mode->flags & DRM_MODE_FLAG_DBLCLK) |
253 | return MODE_H_ILLEGAL; | |
254 | ||
a4fc5ed6 KP |
255 | return MODE_OK; |
256 | } | |
257 | ||
258 | static uint32_t | |
259 | pack_aux(uint8_t *src, int src_bytes) | |
260 | { | |
261 | int i; | |
262 | uint32_t v = 0; | |
263 | ||
264 | if (src_bytes > 4) | |
265 | src_bytes = 4; | |
266 | for (i = 0; i < src_bytes; i++) | |
267 | v |= ((uint32_t) src[i]) << ((3-i) * 8); | |
268 | return v; | |
269 | } | |
270 | ||
271 | static void | |
272 | unpack_aux(uint32_t src, uint8_t *dst, int dst_bytes) | |
273 | { | |
274 | int i; | |
275 | if (dst_bytes > 4) | |
276 | dst_bytes = 4; | |
277 | for (i = 0; i < dst_bytes; i++) | |
278 | dst[i] = src >> ((3-i) * 8); | |
279 | } | |
280 | ||
fb0f8fbf KP |
281 | /* hrawclock is 1/4 the FSB frequency */ |
282 | static int | |
283 | intel_hrawclk(struct drm_device *dev) | |
284 | { | |
285 | struct drm_i915_private *dev_priv = dev->dev_private; | |
286 | uint32_t clkcfg; | |
287 | ||
288 | clkcfg = I915_READ(CLKCFG); | |
289 | switch (clkcfg & CLKCFG_FSB_MASK) { | |
290 | case CLKCFG_FSB_400: | |
291 | return 100; | |
292 | case CLKCFG_FSB_533: | |
293 | return 133; | |
294 | case CLKCFG_FSB_667: | |
295 | return 166; | |
296 | case CLKCFG_FSB_800: | |
297 | return 200; | |
298 | case CLKCFG_FSB_1067: | |
299 | return 266; | |
300 | case CLKCFG_FSB_1333: | |
301 | return 333; | |
302 | /* these two are just a guess; one of them might be right */ | |
303 | case CLKCFG_FSB_1600: | |
304 | case CLKCFG_FSB_1600_ALT: | |
305 | return 400; | |
306 | default: | |
307 | return 133; | |
308 | } | |
309 | } | |
310 | ||
ebf33b18 KP |
311 | static bool ironlake_edp_have_panel_power(struct intel_dp *intel_dp) |
312 | { | |
313 | struct drm_device *dev = intel_dp->base.base.dev; | |
314 | struct drm_i915_private *dev_priv = dev->dev_private; | |
315 | ||
316 | return (I915_READ(PCH_PP_STATUS) & PP_ON) != 0; | |
317 | } | |
318 | ||
319 | static bool ironlake_edp_have_panel_vdd(struct intel_dp *intel_dp) | |
320 | { | |
321 | struct drm_device *dev = intel_dp->base.base.dev; | |
322 | struct drm_i915_private *dev_priv = dev->dev_private; | |
323 | ||
324 | return (I915_READ(PCH_PP_CONTROL) & EDP_FORCE_VDD) != 0; | |
325 | } | |
326 | ||
9b984dae KP |
327 | static void |
328 | intel_dp_check_edp(struct intel_dp *intel_dp) | |
329 | { | |
330 | struct drm_device *dev = intel_dp->base.base.dev; | |
331 | struct drm_i915_private *dev_priv = dev->dev_private; | |
ebf33b18 | 332 | |
9b984dae KP |
333 | if (!is_edp(intel_dp)) |
334 | return; | |
ebf33b18 | 335 | if (!ironlake_edp_have_panel_power(intel_dp) && !ironlake_edp_have_panel_vdd(intel_dp)) { |
9b984dae KP |
336 | WARN(1, "eDP powered off while attempting aux channel communication.\n"); |
337 | DRM_DEBUG_KMS("Status 0x%08x Control 0x%08x\n", | |
ebf33b18 | 338 | I915_READ(PCH_PP_STATUS), |
9b984dae KP |
339 | I915_READ(PCH_PP_CONTROL)); |
340 | } | |
341 | } | |
342 | ||
a4fc5ed6 | 343 | static int |
ea5b213a | 344 | intel_dp_aux_ch(struct intel_dp *intel_dp, |
a4fc5ed6 KP |
345 | uint8_t *send, int send_bytes, |
346 | uint8_t *recv, int recv_size) | |
347 | { | |
ea5b213a | 348 | uint32_t output_reg = intel_dp->output_reg; |
4ef69c7a | 349 | struct drm_device *dev = intel_dp->base.base.dev; |
a4fc5ed6 KP |
350 | struct drm_i915_private *dev_priv = dev->dev_private; |
351 | uint32_t ch_ctl = output_reg + 0x10; | |
352 | uint32_t ch_data = ch_ctl + 4; | |
353 | int i; | |
354 | int recv_bytes; | |
a4fc5ed6 | 355 | uint32_t status; |
fb0f8fbf | 356 | uint32_t aux_clock_divider; |
6b4e0a93 | 357 | int try, precharge; |
a4fc5ed6 | 358 | |
9b984dae | 359 | intel_dp_check_edp(intel_dp); |
a4fc5ed6 | 360 | /* The clock divider is based off the hrawclk, |
fb0f8fbf KP |
361 | * and would like to run at 2MHz. So, take the |
362 | * hrawclk value and divide by 2 and use that | |
6176b8f9 JB |
363 | * |
364 | * Note that PCH attached eDP panels should use a 125MHz input | |
365 | * clock divider. | |
a4fc5ed6 | 366 | */ |
1c95822a | 367 | if (is_cpu_edp(intel_dp)) { |
1a2eb460 KP |
368 | if (IS_GEN6(dev) || IS_GEN7(dev)) |
369 | aux_clock_divider = 200; /* SNB & IVB eDP input clock at 400Mhz */ | |
e3421a18 ZW |
370 | else |
371 | aux_clock_divider = 225; /* eDP input clock at 450Mhz */ | |
372 | } else if (HAS_PCH_SPLIT(dev)) | |
6919132e | 373 | aux_clock_divider = 63; /* IRL input clock fixed at 125Mhz */ |
5eb08b69 ZW |
374 | else |
375 | aux_clock_divider = intel_hrawclk(dev) / 2; | |
376 | ||
6b4e0a93 DV |
377 | if (IS_GEN6(dev)) |
378 | precharge = 3; | |
379 | else | |
380 | precharge = 5; | |
381 | ||
11bee43e JB |
382 | /* Try to wait for any previous AUX channel activity */ |
383 | for (try = 0; try < 3; try++) { | |
384 | status = I915_READ(ch_ctl); | |
385 | if ((status & DP_AUX_CH_CTL_SEND_BUSY) == 0) | |
386 | break; | |
387 | msleep(1); | |
388 | } | |
389 | ||
390 | if (try == 3) { | |
391 | WARN(1, "dp_aux_ch not started status 0x%08x\n", | |
392 | I915_READ(ch_ctl)); | |
4f7f7b7e CW |
393 | return -EBUSY; |
394 | } | |
395 | ||
fb0f8fbf KP |
396 | /* Must try at least 3 times according to DP spec */ |
397 | for (try = 0; try < 5; try++) { | |
398 | /* Load the send data into the aux channel data registers */ | |
4f7f7b7e CW |
399 | for (i = 0; i < send_bytes; i += 4) |
400 | I915_WRITE(ch_data + i, | |
401 | pack_aux(send + i, send_bytes - i)); | |
0206e353 | 402 | |
fb0f8fbf | 403 | /* Send the command and wait for it to complete */ |
4f7f7b7e CW |
404 | I915_WRITE(ch_ctl, |
405 | DP_AUX_CH_CTL_SEND_BUSY | | |
406 | DP_AUX_CH_CTL_TIME_OUT_400us | | |
407 | (send_bytes << DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT) | | |
408 | (precharge << DP_AUX_CH_CTL_PRECHARGE_2US_SHIFT) | | |
409 | (aux_clock_divider << DP_AUX_CH_CTL_BIT_CLOCK_2X_SHIFT) | | |
410 | DP_AUX_CH_CTL_DONE | | |
411 | DP_AUX_CH_CTL_TIME_OUT_ERROR | | |
412 | DP_AUX_CH_CTL_RECEIVE_ERROR); | |
fb0f8fbf | 413 | for (;;) { |
fb0f8fbf KP |
414 | status = I915_READ(ch_ctl); |
415 | if ((status & DP_AUX_CH_CTL_SEND_BUSY) == 0) | |
416 | break; | |
4f7f7b7e | 417 | udelay(100); |
fb0f8fbf | 418 | } |
0206e353 | 419 | |
fb0f8fbf | 420 | /* Clear done status and any errors */ |
4f7f7b7e CW |
421 | I915_WRITE(ch_ctl, |
422 | status | | |
423 | DP_AUX_CH_CTL_DONE | | |
424 | DP_AUX_CH_CTL_TIME_OUT_ERROR | | |
425 | DP_AUX_CH_CTL_RECEIVE_ERROR); | |
d7e96fea AJ |
426 | |
427 | if (status & (DP_AUX_CH_CTL_TIME_OUT_ERROR | | |
428 | DP_AUX_CH_CTL_RECEIVE_ERROR)) | |
429 | continue; | |
4f7f7b7e | 430 | if (status & DP_AUX_CH_CTL_DONE) |
a4fc5ed6 KP |
431 | break; |
432 | } | |
433 | ||
a4fc5ed6 | 434 | if ((status & DP_AUX_CH_CTL_DONE) == 0) { |
1ae8c0a5 | 435 | DRM_ERROR("dp_aux_ch not done status 0x%08x\n", status); |
a5b3da54 | 436 | return -EBUSY; |
a4fc5ed6 KP |
437 | } |
438 | ||
439 | /* Check for timeout or receive error. | |
440 | * Timeouts occur when the sink is not connected | |
441 | */ | |
a5b3da54 | 442 | if (status & DP_AUX_CH_CTL_RECEIVE_ERROR) { |
1ae8c0a5 | 443 | DRM_ERROR("dp_aux_ch receive error status 0x%08x\n", status); |
a5b3da54 KP |
444 | return -EIO; |
445 | } | |
1ae8c0a5 KP |
446 | |
447 | /* Timeouts occur when the device isn't connected, so they're | |
448 | * "normal" -- don't fill the kernel log with these */ | |
a5b3da54 | 449 | if (status & DP_AUX_CH_CTL_TIME_OUT_ERROR) { |
28c97730 | 450 | DRM_DEBUG_KMS("dp_aux_ch timeout status 0x%08x\n", status); |
a5b3da54 | 451 | return -ETIMEDOUT; |
a4fc5ed6 KP |
452 | } |
453 | ||
454 | /* Unload any bytes sent back from the other side */ | |
455 | recv_bytes = ((status & DP_AUX_CH_CTL_MESSAGE_SIZE_MASK) >> | |
456 | DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT); | |
a4fc5ed6 KP |
457 | if (recv_bytes > recv_size) |
458 | recv_bytes = recv_size; | |
0206e353 | 459 | |
4f7f7b7e CW |
460 | for (i = 0; i < recv_bytes; i += 4) |
461 | unpack_aux(I915_READ(ch_data + i), | |
462 | recv + i, recv_bytes - i); | |
a4fc5ed6 KP |
463 | |
464 | return recv_bytes; | |
465 | } | |
466 | ||
467 | /* Write data to the aux channel in native mode */ | |
468 | static int | |
ea5b213a | 469 | intel_dp_aux_native_write(struct intel_dp *intel_dp, |
a4fc5ed6 KP |
470 | uint16_t address, uint8_t *send, int send_bytes) |
471 | { | |
472 | int ret; | |
473 | uint8_t msg[20]; | |
474 | int msg_bytes; | |
475 | uint8_t ack; | |
476 | ||
9b984dae | 477 | intel_dp_check_edp(intel_dp); |
a4fc5ed6 KP |
478 | if (send_bytes > 16) |
479 | return -1; | |
480 | msg[0] = AUX_NATIVE_WRITE << 4; | |
481 | msg[1] = address >> 8; | |
eebc863e | 482 | msg[2] = address & 0xff; |
a4fc5ed6 KP |
483 | msg[3] = send_bytes - 1; |
484 | memcpy(&msg[4], send, send_bytes); | |
485 | msg_bytes = send_bytes + 4; | |
486 | for (;;) { | |
ea5b213a | 487 | ret = intel_dp_aux_ch(intel_dp, msg, msg_bytes, &ack, 1); |
a4fc5ed6 KP |
488 | if (ret < 0) |
489 | return ret; | |
490 | if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_ACK) | |
491 | break; | |
492 | else if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_DEFER) | |
493 | udelay(100); | |
494 | else | |
a5b3da54 | 495 | return -EIO; |
a4fc5ed6 KP |
496 | } |
497 | return send_bytes; | |
498 | } | |
499 | ||
500 | /* Write a single byte to the aux channel in native mode */ | |
501 | static int | |
ea5b213a | 502 | intel_dp_aux_native_write_1(struct intel_dp *intel_dp, |
a4fc5ed6 KP |
503 | uint16_t address, uint8_t byte) |
504 | { | |
ea5b213a | 505 | return intel_dp_aux_native_write(intel_dp, address, &byte, 1); |
a4fc5ed6 KP |
506 | } |
507 | ||
508 | /* read bytes from a native aux channel */ | |
509 | static int | |
ea5b213a | 510 | intel_dp_aux_native_read(struct intel_dp *intel_dp, |
a4fc5ed6 KP |
511 | uint16_t address, uint8_t *recv, int recv_bytes) |
512 | { | |
513 | uint8_t msg[4]; | |
514 | int msg_bytes; | |
515 | uint8_t reply[20]; | |
516 | int reply_bytes; | |
517 | uint8_t ack; | |
518 | int ret; | |
519 | ||
9b984dae | 520 | intel_dp_check_edp(intel_dp); |
a4fc5ed6 KP |
521 | msg[0] = AUX_NATIVE_READ << 4; |
522 | msg[1] = address >> 8; | |
523 | msg[2] = address & 0xff; | |
524 | msg[3] = recv_bytes - 1; | |
525 | ||
526 | msg_bytes = 4; | |
527 | reply_bytes = recv_bytes + 1; | |
528 | ||
529 | for (;;) { | |
ea5b213a | 530 | ret = intel_dp_aux_ch(intel_dp, msg, msg_bytes, |
a4fc5ed6 | 531 | reply, reply_bytes); |
a5b3da54 KP |
532 | if (ret == 0) |
533 | return -EPROTO; | |
534 | if (ret < 0) | |
a4fc5ed6 KP |
535 | return ret; |
536 | ack = reply[0]; | |
537 | if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_ACK) { | |
538 | memcpy(recv, reply + 1, ret - 1); | |
539 | return ret - 1; | |
540 | } | |
541 | else if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_DEFER) | |
542 | udelay(100); | |
543 | else | |
a5b3da54 | 544 | return -EIO; |
a4fc5ed6 KP |
545 | } |
546 | } | |
547 | ||
548 | static int | |
ab2c0672 DA |
549 | intel_dp_i2c_aux_ch(struct i2c_adapter *adapter, int mode, |
550 | uint8_t write_byte, uint8_t *read_byte) | |
a4fc5ed6 | 551 | { |
ab2c0672 | 552 | struct i2c_algo_dp_aux_data *algo_data = adapter->algo_data; |
ea5b213a CW |
553 | struct intel_dp *intel_dp = container_of(adapter, |
554 | struct intel_dp, | |
555 | adapter); | |
ab2c0672 DA |
556 | uint16_t address = algo_data->address; |
557 | uint8_t msg[5]; | |
558 | uint8_t reply[2]; | |
8316f337 | 559 | unsigned retry; |
ab2c0672 DA |
560 | int msg_bytes; |
561 | int reply_bytes; | |
562 | int ret; | |
563 | ||
9b984dae | 564 | intel_dp_check_edp(intel_dp); |
ab2c0672 DA |
565 | /* Set up the command byte */ |
566 | if (mode & MODE_I2C_READ) | |
567 | msg[0] = AUX_I2C_READ << 4; | |
568 | else | |
569 | msg[0] = AUX_I2C_WRITE << 4; | |
570 | ||
571 | if (!(mode & MODE_I2C_STOP)) | |
572 | msg[0] |= AUX_I2C_MOT << 4; | |
a4fc5ed6 | 573 | |
ab2c0672 DA |
574 | msg[1] = address >> 8; |
575 | msg[2] = address; | |
576 | ||
577 | switch (mode) { | |
578 | case MODE_I2C_WRITE: | |
579 | msg[3] = 0; | |
580 | msg[4] = write_byte; | |
581 | msg_bytes = 5; | |
582 | reply_bytes = 1; | |
583 | break; | |
584 | case MODE_I2C_READ: | |
585 | msg[3] = 0; | |
586 | msg_bytes = 4; | |
587 | reply_bytes = 2; | |
588 | break; | |
589 | default: | |
590 | msg_bytes = 3; | |
591 | reply_bytes = 1; | |
592 | break; | |
593 | } | |
594 | ||
8316f337 DF |
595 | for (retry = 0; retry < 5; retry++) { |
596 | ret = intel_dp_aux_ch(intel_dp, | |
597 | msg, msg_bytes, | |
598 | reply, reply_bytes); | |
ab2c0672 | 599 | if (ret < 0) { |
3ff99164 | 600 | DRM_DEBUG_KMS("aux_ch failed %d\n", ret); |
ab2c0672 DA |
601 | return ret; |
602 | } | |
8316f337 DF |
603 | |
604 | switch (reply[0] & AUX_NATIVE_REPLY_MASK) { | |
605 | case AUX_NATIVE_REPLY_ACK: | |
606 | /* I2C-over-AUX Reply field is only valid | |
607 | * when paired with AUX ACK. | |
608 | */ | |
609 | break; | |
610 | case AUX_NATIVE_REPLY_NACK: | |
611 | DRM_DEBUG_KMS("aux_ch native nack\n"); | |
612 | return -EREMOTEIO; | |
613 | case AUX_NATIVE_REPLY_DEFER: | |
614 | udelay(100); | |
615 | continue; | |
616 | default: | |
617 | DRM_ERROR("aux_ch invalid native reply 0x%02x\n", | |
618 | reply[0]); | |
619 | return -EREMOTEIO; | |
620 | } | |
621 | ||
ab2c0672 DA |
622 | switch (reply[0] & AUX_I2C_REPLY_MASK) { |
623 | case AUX_I2C_REPLY_ACK: | |
624 | if (mode == MODE_I2C_READ) { | |
625 | *read_byte = reply[1]; | |
626 | } | |
627 | return reply_bytes - 1; | |
628 | case AUX_I2C_REPLY_NACK: | |
8316f337 | 629 | DRM_DEBUG_KMS("aux_i2c nack\n"); |
ab2c0672 DA |
630 | return -EREMOTEIO; |
631 | case AUX_I2C_REPLY_DEFER: | |
8316f337 | 632 | DRM_DEBUG_KMS("aux_i2c defer\n"); |
ab2c0672 DA |
633 | udelay(100); |
634 | break; | |
635 | default: | |
8316f337 | 636 | DRM_ERROR("aux_i2c invalid reply 0x%02x\n", reply[0]); |
ab2c0672 DA |
637 | return -EREMOTEIO; |
638 | } | |
639 | } | |
8316f337 DF |
640 | |
641 | DRM_ERROR("too many retries, giving up\n"); | |
642 | return -EREMOTEIO; | |
a4fc5ed6 KP |
643 | } |
644 | ||
0b5c541b | 645 | static void ironlake_edp_panel_vdd_on(struct intel_dp *intel_dp); |
bd943159 | 646 | static void ironlake_edp_panel_vdd_off(struct intel_dp *intel_dp, bool sync); |
0b5c541b | 647 | |
a4fc5ed6 | 648 | static int |
ea5b213a | 649 | intel_dp_i2c_init(struct intel_dp *intel_dp, |
55f78c43 | 650 | struct intel_connector *intel_connector, const char *name) |
a4fc5ed6 | 651 | { |
0b5c541b KP |
652 | int ret; |
653 | ||
d54e9d28 | 654 | DRM_DEBUG_KMS("i2c_init %s\n", name); |
ea5b213a CW |
655 | intel_dp->algo.running = false; |
656 | intel_dp->algo.address = 0; | |
657 | intel_dp->algo.aux_ch = intel_dp_i2c_aux_ch; | |
658 | ||
0206e353 | 659 | memset(&intel_dp->adapter, '\0', sizeof(intel_dp->adapter)); |
ea5b213a CW |
660 | intel_dp->adapter.owner = THIS_MODULE; |
661 | intel_dp->adapter.class = I2C_CLASS_DDC; | |
0206e353 | 662 | strncpy(intel_dp->adapter.name, name, sizeof(intel_dp->adapter.name) - 1); |
ea5b213a CW |
663 | intel_dp->adapter.name[sizeof(intel_dp->adapter.name) - 1] = '\0'; |
664 | intel_dp->adapter.algo_data = &intel_dp->algo; | |
665 | intel_dp->adapter.dev.parent = &intel_connector->base.kdev; | |
666 | ||
0b5c541b KP |
667 | ironlake_edp_panel_vdd_on(intel_dp); |
668 | ret = i2c_dp_aux_add_bus(&intel_dp->adapter); | |
bd943159 | 669 | ironlake_edp_panel_vdd_off(intel_dp, false); |
0b5c541b | 670 | return ret; |
a4fc5ed6 KP |
671 | } |
672 | ||
673 | static bool | |
e811f5ae LP |
674 | intel_dp_mode_fixup(struct drm_encoder *encoder, |
675 | const struct drm_display_mode *mode, | |
a4fc5ed6 KP |
676 | struct drm_display_mode *adjusted_mode) |
677 | { | |
0d3a1bee | 678 | struct drm_device *dev = encoder->dev; |
ea5b213a | 679 | struct intel_dp *intel_dp = enc_to_intel_dp(encoder); |
a4fc5ed6 | 680 | int lane_count, clock; |
ea5b213a CW |
681 | int max_lane_count = intel_dp_max_lane_count(intel_dp); |
682 | int max_clock = intel_dp_max_link_bw(intel_dp) == DP_LINK_BW_2_7 ? 1 : 0; | |
083f9560 | 683 | int bpp, mode_rate; |
a4fc5ed6 KP |
684 | static int bws[2] = { DP_LINK_BW_1_62, DP_LINK_BW_2_7 }; |
685 | ||
d15456de KP |
686 | if (is_edp(intel_dp) && intel_dp->panel_fixed_mode) { |
687 | intel_fixed_panel_mode(intel_dp->panel_fixed_mode, adjusted_mode); | |
1d8e1c75 CW |
688 | intel_pch_panel_fitting(dev, DRM_MODE_SCALE_FULLSCREEN, |
689 | mode, adjusted_mode); | |
0d3a1bee ZY |
690 | } |
691 | ||
cb1793ce | 692 | if (adjusted_mode->flags & DRM_MODE_FLAG_DBLCLK) |
0af78a2b DV |
693 | return false; |
694 | ||
083f9560 DV |
695 | DRM_DEBUG_KMS("DP link computation with max lane count %i " |
696 | "max bw %02x pixel clock %iKHz\n", | |
71244653 | 697 | max_lane_count, bws[max_clock], adjusted_mode->clock); |
083f9560 | 698 | |
cb1793ce | 699 | if (!intel_dp_adjust_dithering(intel_dp, adjusted_mode, true)) |
c4867936 DV |
700 | return false; |
701 | ||
702 | bpp = adjusted_mode->private_flags & INTEL_MODE_DP_FORCE_6BPC ? 18 : 24; | |
71244653 | 703 | mode_rate = intel_dp_link_required(adjusted_mode->clock, bpp); |
c4867936 | 704 | |
2514bc51 JB |
705 | for (clock = 0; clock <= max_clock; clock++) { |
706 | for (lane_count = 1; lane_count <= max_lane_count; lane_count <<= 1) { | |
fe27d53e | 707 | int link_avail = intel_dp_max_data_rate(intel_dp_link_clock(bws[clock]), lane_count); |
a4fc5ed6 | 708 | |
083f9560 | 709 | if (mode_rate <= link_avail) { |
ea5b213a CW |
710 | intel_dp->link_bw = bws[clock]; |
711 | intel_dp->lane_count = lane_count; | |
712 | adjusted_mode->clock = intel_dp_link_clock(intel_dp->link_bw); | |
083f9560 DV |
713 | DRM_DEBUG_KMS("DP link bw %02x lane " |
714 | "count %d clock %d bpp %d\n", | |
ea5b213a | 715 | intel_dp->link_bw, intel_dp->lane_count, |
083f9560 DV |
716 | adjusted_mode->clock, bpp); |
717 | DRM_DEBUG_KMS("DP link bw required %i available %i\n", | |
718 | mode_rate, link_avail); | |
a4fc5ed6 KP |
719 | return true; |
720 | } | |
721 | } | |
722 | } | |
fe27d53e | 723 | |
a4fc5ed6 KP |
724 | return false; |
725 | } | |
726 | ||
727 | struct intel_dp_m_n { | |
728 | uint32_t tu; | |
729 | uint32_t gmch_m; | |
730 | uint32_t gmch_n; | |
731 | uint32_t link_m; | |
732 | uint32_t link_n; | |
733 | }; | |
734 | ||
735 | static void | |
736 | intel_reduce_ratio(uint32_t *num, uint32_t *den) | |
737 | { | |
738 | while (*num > 0xffffff || *den > 0xffffff) { | |
739 | *num >>= 1; | |
740 | *den >>= 1; | |
741 | } | |
742 | } | |
743 | ||
744 | static void | |
36e83a18 | 745 | intel_dp_compute_m_n(int bpp, |
a4fc5ed6 KP |
746 | int nlanes, |
747 | int pixel_clock, | |
748 | int link_clock, | |
749 | struct intel_dp_m_n *m_n) | |
750 | { | |
751 | m_n->tu = 64; | |
36e83a18 | 752 | m_n->gmch_m = (pixel_clock * bpp) >> 3; |
a4fc5ed6 KP |
753 | m_n->gmch_n = link_clock * nlanes; |
754 | intel_reduce_ratio(&m_n->gmch_m, &m_n->gmch_n); | |
755 | m_n->link_m = pixel_clock; | |
756 | m_n->link_n = link_clock; | |
757 | intel_reduce_ratio(&m_n->link_m, &m_n->link_n); | |
758 | } | |
759 | ||
760 | void | |
761 | intel_dp_set_m_n(struct drm_crtc *crtc, struct drm_display_mode *mode, | |
762 | struct drm_display_mode *adjusted_mode) | |
763 | { | |
764 | struct drm_device *dev = crtc->dev; | |
6c2b7c12 | 765 | struct intel_encoder *encoder; |
a4fc5ed6 KP |
766 | struct drm_i915_private *dev_priv = dev->dev_private; |
767 | struct intel_crtc *intel_crtc = to_intel_crtc(crtc); | |
858fa035 | 768 | int lane_count = 4; |
a4fc5ed6 | 769 | struct intel_dp_m_n m_n; |
9db4a9c7 | 770 | int pipe = intel_crtc->pipe; |
a4fc5ed6 KP |
771 | |
772 | /* | |
21d40d37 | 773 | * Find the lane count in the intel_encoder private |
a4fc5ed6 | 774 | */ |
6c2b7c12 DV |
775 | for_each_encoder_on_crtc(dev, crtc, encoder) { |
776 | struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base); | |
a4fc5ed6 | 777 | |
9a10f401 KP |
778 | if (intel_dp->base.type == INTEL_OUTPUT_DISPLAYPORT || |
779 | intel_dp->base.type == INTEL_OUTPUT_EDP) | |
780 | { | |
ea5b213a | 781 | lane_count = intel_dp->lane_count; |
51190667 | 782 | break; |
a4fc5ed6 KP |
783 | } |
784 | } | |
785 | ||
786 | /* | |
787 | * Compute the GMCH and Link ratios. The '3' here is | |
788 | * the number of bytes_per_pixel post-LUT, which we always | |
789 | * set up for 8-bits of R/G/B, or 3 bytes total. | |
790 | */ | |
858fa035 | 791 | intel_dp_compute_m_n(intel_crtc->bpp, lane_count, |
a4fc5ed6 KP |
792 | mode->clock, adjusted_mode->clock, &m_n); |
793 | ||
c619eed4 | 794 | if (HAS_PCH_SPLIT(dev)) { |
9db4a9c7 JB |
795 | I915_WRITE(TRANSDATA_M1(pipe), |
796 | ((m_n.tu - 1) << PIPE_GMCH_DATA_M_TU_SIZE_SHIFT) | | |
797 | m_n.gmch_m); | |
798 | I915_WRITE(TRANSDATA_N1(pipe), m_n.gmch_n); | |
799 | I915_WRITE(TRANSDPLINK_M1(pipe), m_n.link_m); | |
800 | I915_WRITE(TRANSDPLINK_N1(pipe), m_n.link_n); | |
a4fc5ed6 | 801 | } else { |
9db4a9c7 JB |
802 | I915_WRITE(PIPE_GMCH_DATA_M(pipe), |
803 | ((m_n.tu - 1) << PIPE_GMCH_DATA_M_TU_SIZE_SHIFT) | | |
804 | m_n.gmch_m); | |
805 | I915_WRITE(PIPE_GMCH_DATA_N(pipe), m_n.gmch_n); | |
806 | I915_WRITE(PIPE_DP_LINK_M(pipe), m_n.link_m); | |
807 | I915_WRITE(PIPE_DP_LINK_N(pipe), m_n.link_n); | |
a4fc5ed6 KP |
808 | } |
809 | } | |
810 | ||
811 | static void | |
812 | intel_dp_mode_set(struct drm_encoder *encoder, struct drm_display_mode *mode, | |
813 | struct drm_display_mode *adjusted_mode) | |
814 | { | |
e3421a18 | 815 | struct drm_device *dev = encoder->dev; |
417e822d | 816 | struct drm_i915_private *dev_priv = dev->dev_private; |
ea5b213a | 817 | struct intel_dp *intel_dp = enc_to_intel_dp(encoder); |
4ef69c7a | 818 | struct drm_crtc *crtc = intel_dp->base.base.crtc; |
a4fc5ed6 KP |
819 | struct intel_crtc *intel_crtc = to_intel_crtc(crtc); |
820 | ||
417e822d | 821 | /* |
1a2eb460 | 822 | * There are four kinds of DP registers: |
417e822d KP |
823 | * |
824 | * IBX PCH | |
1a2eb460 KP |
825 | * SNB CPU |
826 | * IVB CPU | |
417e822d KP |
827 | * CPT PCH |
828 | * | |
829 | * IBX PCH and CPU are the same for almost everything, | |
830 | * except that the CPU DP PLL is configured in this | |
831 | * register | |
832 | * | |
833 | * CPT PCH is quite different, having many bits moved | |
834 | * to the TRANS_DP_CTL register instead. That | |
835 | * configuration happens (oddly) in ironlake_pch_enable | |
836 | */ | |
9c9e7927 | 837 | |
417e822d KP |
838 | /* Preserve the BIOS-computed detected bit. This is |
839 | * supposed to be read-only. | |
840 | */ | |
841 | intel_dp->DP = I915_READ(intel_dp->output_reg) & DP_DETECTED; | |
a4fc5ed6 | 842 | |
417e822d | 843 | /* Handle DP bits in common between all three register formats */ |
417e822d | 844 | intel_dp->DP |= DP_VOLTAGE_0_4 | DP_PRE_EMPHASIS_0; |
a4fc5ed6 | 845 | |
ea5b213a | 846 | switch (intel_dp->lane_count) { |
a4fc5ed6 | 847 | case 1: |
ea5b213a | 848 | intel_dp->DP |= DP_PORT_WIDTH_1; |
a4fc5ed6 KP |
849 | break; |
850 | case 2: | |
ea5b213a | 851 | intel_dp->DP |= DP_PORT_WIDTH_2; |
a4fc5ed6 KP |
852 | break; |
853 | case 4: | |
ea5b213a | 854 | intel_dp->DP |= DP_PORT_WIDTH_4; |
a4fc5ed6 KP |
855 | break; |
856 | } | |
e0dac65e WF |
857 | if (intel_dp->has_audio) { |
858 | DRM_DEBUG_DRIVER("Enabling DP audio on pipe %c\n", | |
859 | pipe_name(intel_crtc->pipe)); | |
ea5b213a | 860 | intel_dp->DP |= DP_AUDIO_OUTPUT_ENABLE; |
e0dac65e WF |
861 | intel_write_eld(encoder, adjusted_mode); |
862 | } | |
ea5b213a CW |
863 | memset(intel_dp->link_configuration, 0, DP_LINK_CONFIGURATION_SIZE); |
864 | intel_dp->link_configuration[0] = intel_dp->link_bw; | |
865 | intel_dp->link_configuration[1] = intel_dp->lane_count; | |
a2cab1b2 | 866 | intel_dp->link_configuration[8] = DP_SET_ANSI_8B10B; |
a4fc5ed6 | 867 | /* |
9962c925 | 868 | * Check for DPCD version > 1.1 and enhanced framing support |
a4fc5ed6 | 869 | */ |
7183dc29 JB |
870 | if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11 && |
871 | (intel_dp->dpcd[DP_MAX_LANE_COUNT] & DP_ENHANCED_FRAME_CAP)) { | |
ea5b213a | 872 | intel_dp->link_configuration[1] |= DP_LANE_COUNT_ENHANCED_FRAME_EN; |
a4fc5ed6 KP |
873 | } |
874 | ||
417e822d | 875 | /* Split out the IBX/CPU vs CPT settings */ |
32f9d658 | 876 | |
1a2eb460 KP |
877 | if (is_cpu_edp(intel_dp) && IS_GEN7(dev)) { |
878 | if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC) | |
879 | intel_dp->DP |= DP_SYNC_HS_HIGH; | |
880 | if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC) | |
881 | intel_dp->DP |= DP_SYNC_VS_HIGH; | |
882 | intel_dp->DP |= DP_LINK_TRAIN_OFF_CPT; | |
883 | ||
884 | if (intel_dp->link_configuration[1] & DP_LANE_COUNT_ENHANCED_FRAME_EN) | |
885 | intel_dp->DP |= DP_ENHANCED_FRAMING; | |
886 | ||
887 | intel_dp->DP |= intel_crtc->pipe << 29; | |
888 | ||
889 | /* don't miss out required setting for eDP */ | |
890 | intel_dp->DP |= DP_PLL_ENABLE; | |
891 | if (adjusted_mode->clock < 200000) | |
892 | intel_dp->DP |= DP_PLL_FREQ_160MHZ; | |
893 | else | |
894 | intel_dp->DP |= DP_PLL_FREQ_270MHZ; | |
895 | } else if (!HAS_PCH_CPT(dev) || is_cpu_edp(intel_dp)) { | |
417e822d KP |
896 | intel_dp->DP |= intel_dp->color_range; |
897 | ||
898 | if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC) | |
899 | intel_dp->DP |= DP_SYNC_HS_HIGH; | |
900 | if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC) | |
901 | intel_dp->DP |= DP_SYNC_VS_HIGH; | |
902 | intel_dp->DP |= DP_LINK_TRAIN_OFF; | |
903 | ||
904 | if (intel_dp->link_configuration[1] & DP_LANE_COUNT_ENHANCED_FRAME_EN) | |
905 | intel_dp->DP |= DP_ENHANCED_FRAMING; | |
906 | ||
907 | if (intel_crtc->pipe == 1) | |
908 | intel_dp->DP |= DP_PIPEB_SELECT; | |
909 | ||
910 | if (is_cpu_edp(intel_dp)) { | |
911 | /* don't miss out required setting for eDP */ | |
912 | intel_dp->DP |= DP_PLL_ENABLE; | |
913 | if (adjusted_mode->clock < 200000) | |
914 | intel_dp->DP |= DP_PLL_FREQ_160MHZ; | |
915 | else | |
916 | intel_dp->DP |= DP_PLL_FREQ_270MHZ; | |
917 | } | |
918 | } else { | |
919 | intel_dp->DP |= DP_LINK_TRAIN_OFF_CPT; | |
32f9d658 | 920 | } |
a4fc5ed6 KP |
921 | } |
922 | ||
99ea7127 KP |
923 | #define IDLE_ON_MASK (PP_ON | 0 | PP_SEQUENCE_MASK | 0 | PP_SEQUENCE_STATE_MASK) |
924 | #define IDLE_ON_VALUE (PP_ON | 0 | PP_SEQUENCE_NONE | 0 | PP_SEQUENCE_STATE_ON_IDLE) | |
925 | ||
926 | #define IDLE_OFF_MASK (PP_ON | 0 | PP_SEQUENCE_MASK | 0 | PP_SEQUENCE_STATE_MASK) | |
927 | #define IDLE_OFF_VALUE (0 | 0 | PP_SEQUENCE_NONE | 0 | PP_SEQUENCE_STATE_OFF_IDLE) | |
928 | ||
929 | #define IDLE_CYCLE_MASK (PP_ON | 0 | PP_SEQUENCE_MASK | PP_CYCLE_DELAY_ACTIVE | PP_SEQUENCE_STATE_MASK) | |
930 | #define IDLE_CYCLE_VALUE (0 | 0 | PP_SEQUENCE_NONE | 0 | PP_SEQUENCE_STATE_OFF_IDLE) | |
931 | ||
932 | static void ironlake_wait_panel_status(struct intel_dp *intel_dp, | |
933 | u32 mask, | |
934 | u32 value) | |
bd943159 | 935 | { |
99ea7127 KP |
936 | struct drm_device *dev = intel_dp->base.base.dev; |
937 | struct drm_i915_private *dev_priv = dev->dev_private; | |
32ce697c | 938 | |
99ea7127 KP |
939 | DRM_DEBUG_KMS("mask %08x value %08x status %08x control %08x\n", |
940 | mask, value, | |
941 | I915_READ(PCH_PP_STATUS), | |
942 | I915_READ(PCH_PP_CONTROL)); | |
32ce697c | 943 | |
99ea7127 KP |
944 | if (_wait_for((I915_READ(PCH_PP_STATUS) & mask) == value, 5000, 10)) { |
945 | DRM_ERROR("Panel status timeout: status %08x control %08x\n", | |
946 | I915_READ(PCH_PP_STATUS), | |
947 | I915_READ(PCH_PP_CONTROL)); | |
32ce697c | 948 | } |
99ea7127 | 949 | } |
32ce697c | 950 | |
99ea7127 KP |
951 | static void ironlake_wait_panel_on(struct intel_dp *intel_dp) |
952 | { | |
953 | DRM_DEBUG_KMS("Wait for panel power on\n"); | |
954 | ironlake_wait_panel_status(intel_dp, IDLE_ON_MASK, IDLE_ON_VALUE); | |
bd943159 KP |
955 | } |
956 | ||
99ea7127 KP |
957 | static void ironlake_wait_panel_off(struct intel_dp *intel_dp) |
958 | { | |
959 | DRM_DEBUG_KMS("Wait for panel power off time\n"); | |
960 | ironlake_wait_panel_status(intel_dp, IDLE_OFF_MASK, IDLE_OFF_VALUE); | |
961 | } | |
962 | ||
963 | static void ironlake_wait_panel_power_cycle(struct intel_dp *intel_dp) | |
964 | { | |
965 | DRM_DEBUG_KMS("Wait for panel power cycle\n"); | |
966 | ironlake_wait_panel_status(intel_dp, IDLE_CYCLE_MASK, IDLE_CYCLE_VALUE); | |
967 | } | |
968 | ||
969 | ||
832dd3c1 KP |
970 | /* Read the current pp_control value, unlocking the register if it |
971 | * is locked | |
972 | */ | |
973 | ||
974 | static u32 ironlake_get_pp_control(struct drm_i915_private *dev_priv) | |
975 | { | |
976 | u32 control = I915_READ(PCH_PP_CONTROL); | |
977 | ||
978 | control &= ~PANEL_UNLOCK_MASK; | |
979 | control |= PANEL_UNLOCK_REGS; | |
980 | return control; | |
bd943159 KP |
981 | } |
982 | ||
5d613501 JB |
983 | static void ironlake_edp_panel_vdd_on(struct intel_dp *intel_dp) |
984 | { | |
985 | struct drm_device *dev = intel_dp->base.base.dev; | |
986 | struct drm_i915_private *dev_priv = dev->dev_private; | |
987 | u32 pp; | |
988 | ||
97af61f5 KP |
989 | if (!is_edp(intel_dp)) |
990 | return; | |
f01eca2e | 991 | DRM_DEBUG_KMS("Turn eDP VDD on\n"); |
5d613501 | 992 | |
bd943159 KP |
993 | WARN(intel_dp->want_panel_vdd, |
994 | "eDP VDD already requested on\n"); | |
995 | ||
996 | intel_dp->want_panel_vdd = true; | |
99ea7127 | 997 | |
bd943159 KP |
998 | if (ironlake_edp_have_panel_vdd(intel_dp)) { |
999 | DRM_DEBUG_KMS("eDP VDD already on\n"); | |
1000 | return; | |
1001 | } | |
1002 | ||
99ea7127 KP |
1003 | if (!ironlake_edp_have_panel_power(intel_dp)) |
1004 | ironlake_wait_panel_power_cycle(intel_dp); | |
1005 | ||
832dd3c1 | 1006 | pp = ironlake_get_pp_control(dev_priv); |
5d613501 JB |
1007 | pp |= EDP_FORCE_VDD; |
1008 | I915_WRITE(PCH_PP_CONTROL, pp); | |
1009 | POSTING_READ(PCH_PP_CONTROL); | |
f01eca2e KP |
1010 | DRM_DEBUG_KMS("PCH_PP_STATUS: 0x%08x PCH_PP_CONTROL: 0x%08x\n", |
1011 | I915_READ(PCH_PP_STATUS), I915_READ(PCH_PP_CONTROL)); | |
ebf33b18 KP |
1012 | |
1013 | /* | |
1014 | * If the panel wasn't on, delay before accessing aux channel | |
1015 | */ | |
1016 | if (!ironlake_edp_have_panel_power(intel_dp)) { | |
bd943159 | 1017 | DRM_DEBUG_KMS("eDP was not running\n"); |
f01eca2e | 1018 | msleep(intel_dp->panel_power_up_delay); |
f01eca2e | 1019 | } |
5d613501 JB |
1020 | } |
1021 | ||
bd943159 | 1022 | static void ironlake_panel_vdd_off_sync(struct intel_dp *intel_dp) |
5d613501 JB |
1023 | { |
1024 | struct drm_device *dev = intel_dp->base.base.dev; | |
1025 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1026 | u32 pp; | |
1027 | ||
bd943159 | 1028 | if (!intel_dp->want_panel_vdd && ironlake_edp_have_panel_vdd(intel_dp)) { |
832dd3c1 | 1029 | pp = ironlake_get_pp_control(dev_priv); |
bd943159 KP |
1030 | pp &= ~EDP_FORCE_VDD; |
1031 | I915_WRITE(PCH_PP_CONTROL, pp); | |
1032 | POSTING_READ(PCH_PP_CONTROL); | |
1033 | ||
1034 | /* Make sure sequencer is idle before allowing subsequent activity */ | |
1035 | DRM_DEBUG_KMS("PCH_PP_STATUS: 0x%08x PCH_PP_CONTROL: 0x%08x\n", | |
1036 | I915_READ(PCH_PP_STATUS), I915_READ(PCH_PP_CONTROL)); | |
99ea7127 KP |
1037 | |
1038 | msleep(intel_dp->panel_power_down_delay); | |
bd943159 KP |
1039 | } |
1040 | } | |
5d613501 | 1041 | |
bd943159 KP |
1042 | static void ironlake_panel_vdd_work(struct work_struct *__work) |
1043 | { | |
1044 | struct intel_dp *intel_dp = container_of(to_delayed_work(__work), | |
1045 | struct intel_dp, panel_vdd_work); | |
1046 | struct drm_device *dev = intel_dp->base.base.dev; | |
1047 | ||
627f7675 | 1048 | mutex_lock(&dev->mode_config.mutex); |
bd943159 | 1049 | ironlake_panel_vdd_off_sync(intel_dp); |
627f7675 | 1050 | mutex_unlock(&dev->mode_config.mutex); |
bd943159 KP |
1051 | } |
1052 | ||
1053 | static void ironlake_edp_panel_vdd_off(struct intel_dp *intel_dp, bool sync) | |
1054 | { | |
97af61f5 KP |
1055 | if (!is_edp(intel_dp)) |
1056 | return; | |
5d613501 | 1057 | |
bd943159 KP |
1058 | DRM_DEBUG_KMS("Turn eDP VDD off %d\n", intel_dp->want_panel_vdd); |
1059 | WARN(!intel_dp->want_panel_vdd, "eDP VDD not forced on"); | |
f2e8b18a | 1060 | |
bd943159 KP |
1061 | intel_dp->want_panel_vdd = false; |
1062 | ||
1063 | if (sync) { | |
1064 | ironlake_panel_vdd_off_sync(intel_dp); | |
1065 | } else { | |
1066 | /* | |
1067 | * Queue the timer to fire a long | |
1068 | * time from now (relative to the power down delay) | |
1069 | * to keep the panel power up across a sequence of operations | |
1070 | */ | |
1071 | schedule_delayed_work(&intel_dp->panel_vdd_work, | |
1072 | msecs_to_jiffies(intel_dp->panel_power_cycle_delay * 5)); | |
1073 | } | |
5d613501 JB |
1074 | } |
1075 | ||
86a3073e | 1076 | static void ironlake_edp_panel_on(struct intel_dp *intel_dp) |
9934c132 | 1077 | { |
01cb9ea6 | 1078 | struct drm_device *dev = intel_dp->base.base.dev; |
9934c132 | 1079 | struct drm_i915_private *dev_priv = dev->dev_private; |
99ea7127 | 1080 | u32 pp; |
9934c132 | 1081 | |
97af61f5 | 1082 | if (!is_edp(intel_dp)) |
bd943159 | 1083 | return; |
99ea7127 KP |
1084 | |
1085 | DRM_DEBUG_KMS("Turn eDP power on\n"); | |
1086 | ||
1087 | if (ironlake_edp_have_panel_power(intel_dp)) { | |
1088 | DRM_DEBUG_KMS("eDP power already on\n"); | |
7d639f35 | 1089 | return; |
99ea7127 | 1090 | } |
9934c132 | 1091 | |
99ea7127 | 1092 | ironlake_wait_panel_power_cycle(intel_dp); |
37c6c9b0 | 1093 | |
99ea7127 | 1094 | pp = ironlake_get_pp_control(dev_priv); |
05ce1a49 KP |
1095 | if (IS_GEN5(dev)) { |
1096 | /* ILK workaround: disable reset around power sequence */ | |
1097 | pp &= ~PANEL_POWER_RESET; | |
1098 | I915_WRITE(PCH_PP_CONTROL, pp); | |
1099 | POSTING_READ(PCH_PP_CONTROL); | |
1100 | } | |
37c6c9b0 | 1101 | |
1c0ae80a | 1102 | pp |= POWER_TARGET_ON; |
99ea7127 KP |
1103 | if (!IS_GEN5(dev)) |
1104 | pp |= PANEL_POWER_RESET; | |
1105 | ||
9934c132 | 1106 | I915_WRITE(PCH_PP_CONTROL, pp); |
01cb9ea6 | 1107 | POSTING_READ(PCH_PP_CONTROL); |
9934c132 | 1108 | |
99ea7127 | 1109 | ironlake_wait_panel_on(intel_dp); |
9934c132 | 1110 | |
05ce1a49 KP |
1111 | if (IS_GEN5(dev)) { |
1112 | pp |= PANEL_POWER_RESET; /* restore panel reset bit */ | |
1113 | I915_WRITE(PCH_PP_CONTROL, pp); | |
1114 | POSTING_READ(PCH_PP_CONTROL); | |
1115 | } | |
9934c132 JB |
1116 | } |
1117 | ||
99ea7127 | 1118 | static void ironlake_edp_panel_off(struct intel_dp *intel_dp) |
9934c132 | 1119 | { |
99ea7127 | 1120 | struct drm_device *dev = intel_dp->base.base.dev; |
9934c132 | 1121 | struct drm_i915_private *dev_priv = dev->dev_private; |
99ea7127 | 1122 | u32 pp; |
9934c132 | 1123 | |
97af61f5 KP |
1124 | if (!is_edp(intel_dp)) |
1125 | return; | |
37c6c9b0 | 1126 | |
99ea7127 | 1127 | DRM_DEBUG_KMS("Turn eDP power off\n"); |
37c6c9b0 | 1128 | |
6cb49835 | 1129 | WARN(!intel_dp->want_panel_vdd, "Need VDD to turn off panel\n"); |
37c6c9b0 | 1130 | |
99ea7127 | 1131 | pp = ironlake_get_pp_control(dev_priv); |
35a38556 DV |
1132 | /* We need to switch off panel power _and_ force vdd, for otherwise some |
1133 | * panels get very unhappy and cease to work. */ | |
1134 | pp &= ~(POWER_TARGET_ON | EDP_FORCE_VDD | PANEL_POWER_RESET | EDP_BLC_ENABLE); | |
99ea7127 KP |
1135 | I915_WRITE(PCH_PP_CONTROL, pp); |
1136 | POSTING_READ(PCH_PP_CONTROL); | |
9934c132 | 1137 | |
35a38556 DV |
1138 | intel_dp->want_panel_vdd = false; |
1139 | ||
99ea7127 | 1140 | ironlake_wait_panel_off(intel_dp); |
9934c132 JB |
1141 | } |
1142 | ||
86a3073e | 1143 | static void ironlake_edp_backlight_on(struct intel_dp *intel_dp) |
32f9d658 | 1144 | { |
f01eca2e | 1145 | struct drm_device *dev = intel_dp->base.base.dev; |
32f9d658 ZW |
1146 | struct drm_i915_private *dev_priv = dev->dev_private; |
1147 | u32 pp; | |
1148 | ||
f01eca2e KP |
1149 | if (!is_edp(intel_dp)) |
1150 | return; | |
1151 | ||
28c97730 | 1152 | DRM_DEBUG_KMS("\n"); |
01cb9ea6 JB |
1153 | /* |
1154 | * If we enable the backlight right away following a panel power | |
1155 | * on, we may see slight flicker as the panel syncs with the eDP | |
1156 | * link. So delay a bit to make sure the image is solid before | |
1157 | * allowing it to appear. | |
1158 | */ | |
f01eca2e | 1159 | msleep(intel_dp->backlight_on_delay); |
832dd3c1 | 1160 | pp = ironlake_get_pp_control(dev_priv); |
32f9d658 ZW |
1161 | pp |= EDP_BLC_ENABLE; |
1162 | I915_WRITE(PCH_PP_CONTROL, pp); | |
f01eca2e | 1163 | POSTING_READ(PCH_PP_CONTROL); |
32f9d658 ZW |
1164 | } |
1165 | ||
86a3073e | 1166 | static void ironlake_edp_backlight_off(struct intel_dp *intel_dp) |
32f9d658 | 1167 | { |
f01eca2e | 1168 | struct drm_device *dev = intel_dp->base.base.dev; |
32f9d658 ZW |
1169 | struct drm_i915_private *dev_priv = dev->dev_private; |
1170 | u32 pp; | |
1171 | ||
f01eca2e KP |
1172 | if (!is_edp(intel_dp)) |
1173 | return; | |
1174 | ||
28c97730 | 1175 | DRM_DEBUG_KMS("\n"); |
832dd3c1 | 1176 | pp = ironlake_get_pp_control(dev_priv); |
32f9d658 ZW |
1177 | pp &= ~EDP_BLC_ENABLE; |
1178 | I915_WRITE(PCH_PP_CONTROL, pp); | |
f01eca2e KP |
1179 | POSTING_READ(PCH_PP_CONTROL); |
1180 | msleep(intel_dp->backlight_off_delay); | |
32f9d658 | 1181 | } |
a4fc5ed6 | 1182 | |
2bd2ad64 | 1183 | static void ironlake_edp_pll_on(struct intel_dp *intel_dp) |
d240f20f | 1184 | { |
2bd2ad64 DV |
1185 | struct drm_device *dev = intel_dp->base.base.dev; |
1186 | struct drm_crtc *crtc = intel_dp->base.base.crtc; | |
d240f20f JB |
1187 | struct drm_i915_private *dev_priv = dev->dev_private; |
1188 | u32 dpa_ctl; | |
1189 | ||
2bd2ad64 DV |
1190 | assert_pipe_disabled(dev_priv, |
1191 | to_intel_crtc(crtc)->pipe); | |
1192 | ||
d240f20f JB |
1193 | DRM_DEBUG_KMS("\n"); |
1194 | dpa_ctl = I915_READ(DP_A); | |
298b0b39 | 1195 | dpa_ctl |= DP_PLL_ENABLE; |
d240f20f | 1196 | I915_WRITE(DP_A, dpa_ctl); |
298b0b39 JB |
1197 | POSTING_READ(DP_A); |
1198 | udelay(200); | |
d240f20f JB |
1199 | } |
1200 | ||
2bd2ad64 | 1201 | static void ironlake_edp_pll_off(struct intel_dp *intel_dp) |
d240f20f | 1202 | { |
2bd2ad64 DV |
1203 | struct drm_device *dev = intel_dp->base.base.dev; |
1204 | struct drm_crtc *crtc = intel_dp->base.base.crtc; | |
d240f20f JB |
1205 | struct drm_i915_private *dev_priv = dev->dev_private; |
1206 | u32 dpa_ctl; | |
1207 | ||
2bd2ad64 DV |
1208 | assert_pipe_disabled(dev_priv, |
1209 | to_intel_crtc(crtc)->pipe); | |
1210 | ||
d240f20f | 1211 | dpa_ctl = I915_READ(DP_A); |
298b0b39 | 1212 | dpa_ctl &= ~DP_PLL_ENABLE; |
d240f20f | 1213 | I915_WRITE(DP_A, dpa_ctl); |
1af5fa1b | 1214 | POSTING_READ(DP_A); |
d240f20f JB |
1215 | udelay(200); |
1216 | } | |
1217 | ||
c7ad3810 JB |
1218 | /* If the sink supports it, try to set the power state appropriately */ |
1219 | static void intel_dp_sink_dpms(struct intel_dp *intel_dp, int mode) | |
1220 | { | |
1221 | int ret, i; | |
1222 | ||
1223 | /* Should have a valid DPCD by this point */ | |
1224 | if (intel_dp->dpcd[DP_DPCD_REV] < 0x11) | |
1225 | return; | |
1226 | ||
1227 | if (mode != DRM_MODE_DPMS_ON) { | |
1228 | ret = intel_dp_aux_native_write_1(intel_dp, DP_SET_POWER, | |
1229 | DP_SET_POWER_D3); | |
1230 | if (ret != 1) | |
1231 | DRM_DEBUG_DRIVER("failed to write sink power state\n"); | |
1232 | } else { | |
1233 | /* | |
1234 | * When turning on, we need to retry for 1ms to give the sink | |
1235 | * time to wake up. | |
1236 | */ | |
1237 | for (i = 0; i < 3; i++) { | |
1238 | ret = intel_dp_aux_native_write_1(intel_dp, | |
1239 | DP_SET_POWER, | |
1240 | DP_SET_POWER_D0); | |
1241 | if (ret == 1) | |
1242 | break; | |
1243 | msleep(1); | |
1244 | } | |
1245 | } | |
1246 | } | |
1247 | ||
19d8fe15 DV |
1248 | static bool intel_dp_get_hw_state(struct intel_encoder *encoder, |
1249 | enum pipe *pipe) | |
d240f20f | 1250 | { |
19d8fe15 DV |
1251 | struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base); |
1252 | struct drm_device *dev = encoder->base.dev; | |
1253 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1254 | u32 tmp = I915_READ(intel_dp->output_reg); | |
1255 | ||
1256 | if (!(tmp & DP_PORT_EN)) | |
1257 | return false; | |
1258 | ||
1259 | if (is_cpu_edp(intel_dp) && IS_GEN7(dev)) { | |
1260 | *pipe = PORT_TO_PIPE_CPT(tmp); | |
1261 | } else if (!HAS_PCH_CPT(dev) || is_cpu_edp(intel_dp)) { | |
1262 | *pipe = PORT_TO_PIPE(tmp); | |
1263 | } else { | |
1264 | u32 trans_sel; | |
1265 | u32 trans_dp; | |
1266 | int i; | |
1267 | ||
1268 | switch (intel_dp->output_reg) { | |
1269 | case PCH_DP_B: | |
1270 | trans_sel = TRANS_DP_PORT_SEL_B; | |
1271 | break; | |
1272 | case PCH_DP_C: | |
1273 | trans_sel = TRANS_DP_PORT_SEL_C; | |
1274 | break; | |
1275 | case PCH_DP_D: | |
1276 | trans_sel = TRANS_DP_PORT_SEL_D; | |
1277 | break; | |
1278 | default: | |
1279 | return true; | |
1280 | } | |
1281 | ||
1282 | for_each_pipe(i) { | |
1283 | trans_dp = I915_READ(TRANS_DP_CTL(i)); | |
1284 | if ((trans_dp & TRANS_DP_PORT_SEL_MASK) == trans_sel) { | |
1285 | *pipe = i; | |
1286 | return true; | |
1287 | } | |
1288 | } | |
1289 | } | |
1290 | ||
1291 | DRM_DEBUG_KMS("No pipe for dp port 0x%x found\n", intel_dp->output_reg); | |
d240f20f | 1292 | |
19d8fe15 DV |
1293 | return true; |
1294 | } | |
1295 | ||
e8cb4558 | 1296 | static void intel_disable_dp(struct intel_encoder *encoder) |
d240f20f | 1297 | { |
e8cb4558 | 1298 | struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base); |
6cb49835 DV |
1299 | |
1300 | /* Make sure the panel is off before trying to change the mode. But also | |
1301 | * ensure that we have vdd while we switch off the panel. */ | |
1302 | ironlake_edp_panel_vdd_on(intel_dp); | |
21264c63 | 1303 | ironlake_edp_backlight_off(intel_dp); |
c7ad3810 | 1304 | intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON); |
35a38556 | 1305 | ironlake_edp_panel_off(intel_dp); |
21264c63 | 1306 | intel_dp_link_down(intel_dp); |
d240f20f JB |
1307 | } |
1308 | ||
2bd2ad64 DV |
1309 | static void intel_post_disable_dp(struct intel_encoder *encoder) |
1310 | { | |
1311 | struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base); | |
1312 | ||
1313 | if (is_cpu_edp(intel_dp)) | |
1314 | ironlake_edp_pll_off(intel_dp); | |
1315 | } | |
1316 | ||
e8cb4558 | 1317 | static void intel_enable_dp(struct intel_encoder *encoder) |
d240f20f | 1318 | { |
e8cb4558 DV |
1319 | struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base); |
1320 | struct drm_device *dev = encoder->base.dev; | |
1321 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1322 | uint32_t dp_reg = I915_READ(intel_dp->output_reg); | |
5d613501 | 1323 | |
97af61f5 | 1324 | ironlake_edp_panel_vdd_on(intel_dp); |
f01eca2e | 1325 | intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON); |
e8cb4558 DV |
1326 | if (!(dp_reg & DP_PORT_EN)) { |
1327 | intel_dp_start_link_train(intel_dp); | |
1328 | ironlake_edp_panel_on(intel_dp); | |
1329 | ironlake_edp_panel_vdd_off(intel_dp, true); | |
1330 | intel_dp_complete_link_train(intel_dp); | |
1331 | } else | |
1332 | ironlake_edp_panel_vdd_off(intel_dp, false); | |
f01eca2e | 1333 | ironlake_edp_backlight_on(intel_dp); |
d240f20f JB |
1334 | } |
1335 | ||
2bd2ad64 | 1336 | static void intel_pre_enable_dp(struct intel_encoder *encoder) |
a4fc5ed6 | 1337 | { |
2bd2ad64 | 1338 | struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base); |
0a91ca29 | 1339 | |
2bd2ad64 DV |
1340 | if (is_cpu_edp(intel_dp)) |
1341 | ironlake_edp_pll_on(intel_dp); | |
a4fc5ed6 KP |
1342 | } |
1343 | ||
1344 | /* | |
df0c237d JB |
1345 | * Native read with retry for link status and receiver capability reads for |
1346 | * cases where the sink may still be asleep. | |
a4fc5ed6 KP |
1347 | */ |
1348 | static bool | |
df0c237d JB |
1349 | intel_dp_aux_native_read_retry(struct intel_dp *intel_dp, uint16_t address, |
1350 | uint8_t *recv, int recv_bytes) | |
a4fc5ed6 | 1351 | { |
61da5fab JB |
1352 | int ret, i; |
1353 | ||
df0c237d JB |
1354 | /* |
1355 | * Sinks are *supposed* to come up within 1ms from an off state, | |
1356 | * but we're also supposed to retry 3 times per the spec. | |
1357 | */ | |
61da5fab | 1358 | for (i = 0; i < 3; i++) { |
df0c237d JB |
1359 | ret = intel_dp_aux_native_read(intel_dp, address, recv, |
1360 | recv_bytes); | |
1361 | if (ret == recv_bytes) | |
61da5fab JB |
1362 | return true; |
1363 | msleep(1); | |
1364 | } | |
a4fc5ed6 | 1365 | |
61da5fab | 1366 | return false; |
a4fc5ed6 KP |
1367 | } |
1368 | ||
1369 | /* | |
1370 | * Fetch AUX CH registers 0x202 - 0x207 which contain | |
1371 | * link status information | |
1372 | */ | |
1373 | static bool | |
93f62dad | 1374 | intel_dp_get_link_status(struct intel_dp *intel_dp, uint8_t link_status[DP_LINK_STATUS_SIZE]) |
a4fc5ed6 | 1375 | { |
df0c237d JB |
1376 | return intel_dp_aux_native_read_retry(intel_dp, |
1377 | DP_LANE0_1_STATUS, | |
93f62dad | 1378 | link_status, |
df0c237d | 1379 | DP_LINK_STATUS_SIZE); |
a4fc5ed6 KP |
1380 | } |
1381 | ||
1382 | static uint8_t | |
1383 | intel_dp_link_status(uint8_t link_status[DP_LINK_STATUS_SIZE], | |
1384 | int r) | |
1385 | { | |
1386 | return link_status[r - DP_LANE0_1_STATUS]; | |
1387 | } | |
1388 | ||
a4fc5ed6 | 1389 | static uint8_t |
93f62dad | 1390 | intel_get_adjust_request_voltage(uint8_t adjust_request[2], |
a4fc5ed6 KP |
1391 | int lane) |
1392 | { | |
a4fc5ed6 KP |
1393 | int s = ((lane & 1) ? |
1394 | DP_ADJUST_VOLTAGE_SWING_LANE1_SHIFT : | |
1395 | DP_ADJUST_VOLTAGE_SWING_LANE0_SHIFT); | |
93f62dad | 1396 | uint8_t l = adjust_request[lane>>1]; |
a4fc5ed6 KP |
1397 | |
1398 | return ((l >> s) & 3) << DP_TRAIN_VOLTAGE_SWING_SHIFT; | |
1399 | } | |
1400 | ||
1401 | static uint8_t | |
93f62dad | 1402 | intel_get_adjust_request_pre_emphasis(uint8_t adjust_request[2], |
a4fc5ed6 KP |
1403 | int lane) |
1404 | { | |
a4fc5ed6 KP |
1405 | int s = ((lane & 1) ? |
1406 | DP_ADJUST_PRE_EMPHASIS_LANE1_SHIFT : | |
1407 | DP_ADJUST_PRE_EMPHASIS_LANE0_SHIFT); | |
93f62dad | 1408 | uint8_t l = adjust_request[lane>>1]; |
a4fc5ed6 KP |
1409 | |
1410 | return ((l >> s) & 3) << DP_TRAIN_PRE_EMPHASIS_SHIFT; | |
1411 | } | |
1412 | ||
1413 | ||
1414 | #if 0 | |
1415 | static char *voltage_names[] = { | |
1416 | "0.4V", "0.6V", "0.8V", "1.2V" | |
1417 | }; | |
1418 | static char *pre_emph_names[] = { | |
1419 | "0dB", "3.5dB", "6dB", "9.5dB" | |
1420 | }; | |
1421 | static char *link_train_names[] = { | |
1422 | "pattern 1", "pattern 2", "idle", "off" | |
1423 | }; | |
1424 | #endif | |
1425 | ||
1426 | /* | |
1427 | * These are source-specific values; current Intel hardware supports | |
1428 | * a maximum voltage of 800mV and a maximum pre-emphasis of 6dB | |
1429 | */ | |
a4fc5ed6 KP |
1430 | |
1431 | static uint8_t | |
1a2eb460 | 1432 | intel_dp_voltage_max(struct intel_dp *intel_dp) |
a4fc5ed6 | 1433 | { |
1a2eb460 KP |
1434 | struct drm_device *dev = intel_dp->base.base.dev; |
1435 | ||
1436 | if (IS_GEN7(dev) && is_cpu_edp(intel_dp)) | |
1437 | return DP_TRAIN_VOLTAGE_SWING_800; | |
1438 | else if (HAS_PCH_CPT(dev) && !is_cpu_edp(intel_dp)) | |
1439 | return DP_TRAIN_VOLTAGE_SWING_1200; | |
1440 | else | |
1441 | return DP_TRAIN_VOLTAGE_SWING_800; | |
1442 | } | |
1443 | ||
1444 | static uint8_t | |
1445 | intel_dp_pre_emphasis_max(struct intel_dp *intel_dp, uint8_t voltage_swing) | |
1446 | { | |
1447 | struct drm_device *dev = intel_dp->base.base.dev; | |
1448 | ||
1449 | if (IS_GEN7(dev) && is_cpu_edp(intel_dp)) { | |
1450 | switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) { | |
1451 | case DP_TRAIN_VOLTAGE_SWING_400: | |
1452 | return DP_TRAIN_PRE_EMPHASIS_6; | |
1453 | case DP_TRAIN_VOLTAGE_SWING_600: | |
1454 | case DP_TRAIN_VOLTAGE_SWING_800: | |
1455 | return DP_TRAIN_PRE_EMPHASIS_3_5; | |
1456 | default: | |
1457 | return DP_TRAIN_PRE_EMPHASIS_0; | |
1458 | } | |
1459 | } else { | |
1460 | switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) { | |
1461 | case DP_TRAIN_VOLTAGE_SWING_400: | |
1462 | return DP_TRAIN_PRE_EMPHASIS_6; | |
1463 | case DP_TRAIN_VOLTAGE_SWING_600: | |
1464 | return DP_TRAIN_PRE_EMPHASIS_6; | |
1465 | case DP_TRAIN_VOLTAGE_SWING_800: | |
1466 | return DP_TRAIN_PRE_EMPHASIS_3_5; | |
1467 | case DP_TRAIN_VOLTAGE_SWING_1200: | |
1468 | default: | |
1469 | return DP_TRAIN_PRE_EMPHASIS_0; | |
1470 | } | |
a4fc5ed6 KP |
1471 | } |
1472 | } | |
1473 | ||
1474 | static void | |
93f62dad | 1475 | intel_get_adjust_train(struct intel_dp *intel_dp, uint8_t link_status[DP_LINK_STATUS_SIZE]) |
a4fc5ed6 KP |
1476 | { |
1477 | uint8_t v = 0; | |
1478 | uint8_t p = 0; | |
1479 | int lane; | |
93f62dad | 1480 | uint8_t *adjust_request = link_status + (DP_ADJUST_REQUEST_LANE0_1 - DP_LANE0_1_STATUS); |
1a2eb460 KP |
1481 | uint8_t voltage_max; |
1482 | uint8_t preemph_max; | |
a4fc5ed6 | 1483 | |
33a34e4e | 1484 | for (lane = 0; lane < intel_dp->lane_count; lane++) { |
93f62dad KP |
1485 | uint8_t this_v = intel_get_adjust_request_voltage(adjust_request, lane); |
1486 | uint8_t this_p = intel_get_adjust_request_pre_emphasis(adjust_request, lane); | |
a4fc5ed6 KP |
1487 | |
1488 | if (this_v > v) | |
1489 | v = this_v; | |
1490 | if (this_p > p) | |
1491 | p = this_p; | |
1492 | } | |
1493 | ||
1a2eb460 | 1494 | voltage_max = intel_dp_voltage_max(intel_dp); |
417e822d KP |
1495 | if (v >= voltage_max) |
1496 | v = voltage_max | DP_TRAIN_MAX_SWING_REACHED; | |
a4fc5ed6 | 1497 | |
1a2eb460 KP |
1498 | preemph_max = intel_dp_pre_emphasis_max(intel_dp, v); |
1499 | if (p >= preemph_max) | |
1500 | p = preemph_max | DP_TRAIN_MAX_PRE_EMPHASIS_REACHED; | |
a4fc5ed6 KP |
1501 | |
1502 | for (lane = 0; lane < 4; lane++) | |
33a34e4e | 1503 | intel_dp->train_set[lane] = v | p; |
a4fc5ed6 KP |
1504 | } |
1505 | ||
1506 | static uint32_t | |
93f62dad | 1507 | intel_dp_signal_levels(uint8_t train_set) |
a4fc5ed6 | 1508 | { |
3cf2efb1 | 1509 | uint32_t signal_levels = 0; |
a4fc5ed6 | 1510 | |
3cf2efb1 | 1511 | switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) { |
a4fc5ed6 KP |
1512 | case DP_TRAIN_VOLTAGE_SWING_400: |
1513 | default: | |
1514 | signal_levels |= DP_VOLTAGE_0_4; | |
1515 | break; | |
1516 | case DP_TRAIN_VOLTAGE_SWING_600: | |
1517 | signal_levels |= DP_VOLTAGE_0_6; | |
1518 | break; | |
1519 | case DP_TRAIN_VOLTAGE_SWING_800: | |
1520 | signal_levels |= DP_VOLTAGE_0_8; | |
1521 | break; | |
1522 | case DP_TRAIN_VOLTAGE_SWING_1200: | |
1523 | signal_levels |= DP_VOLTAGE_1_2; | |
1524 | break; | |
1525 | } | |
3cf2efb1 | 1526 | switch (train_set & DP_TRAIN_PRE_EMPHASIS_MASK) { |
a4fc5ed6 KP |
1527 | case DP_TRAIN_PRE_EMPHASIS_0: |
1528 | default: | |
1529 | signal_levels |= DP_PRE_EMPHASIS_0; | |
1530 | break; | |
1531 | case DP_TRAIN_PRE_EMPHASIS_3_5: | |
1532 | signal_levels |= DP_PRE_EMPHASIS_3_5; | |
1533 | break; | |
1534 | case DP_TRAIN_PRE_EMPHASIS_6: | |
1535 | signal_levels |= DP_PRE_EMPHASIS_6; | |
1536 | break; | |
1537 | case DP_TRAIN_PRE_EMPHASIS_9_5: | |
1538 | signal_levels |= DP_PRE_EMPHASIS_9_5; | |
1539 | break; | |
1540 | } | |
1541 | return signal_levels; | |
1542 | } | |
1543 | ||
e3421a18 ZW |
1544 | /* Gen6's DP voltage swing and pre-emphasis control */ |
1545 | static uint32_t | |
1546 | intel_gen6_edp_signal_levels(uint8_t train_set) | |
1547 | { | |
3c5a62b5 YL |
1548 | int signal_levels = train_set & (DP_TRAIN_VOLTAGE_SWING_MASK | |
1549 | DP_TRAIN_PRE_EMPHASIS_MASK); | |
1550 | switch (signal_levels) { | |
e3421a18 | 1551 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_0: |
3c5a62b5 YL |
1552 | case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_0: |
1553 | return EDP_LINK_TRAIN_400_600MV_0DB_SNB_B; | |
1554 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_3_5: | |
1555 | return EDP_LINK_TRAIN_400MV_3_5DB_SNB_B; | |
e3421a18 | 1556 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_6: |
3c5a62b5 YL |
1557 | case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_6: |
1558 | return EDP_LINK_TRAIN_400_600MV_6DB_SNB_B; | |
e3421a18 | 1559 | case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_3_5: |
3c5a62b5 YL |
1560 | case DP_TRAIN_VOLTAGE_SWING_800 | DP_TRAIN_PRE_EMPHASIS_3_5: |
1561 | return EDP_LINK_TRAIN_600_800MV_3_5DB_SNB_B; | |
e3421a18 | 1562 | case DP_TRAIN_VOLTAGE_SWING_800 | DP_TRAIN_PRE_EMPHASIS_0: |
3c5a62b5 YL |
1563 | case DP_TRAIN_VOLTAGE_SWING_1200 | DP_TRAIN_PRE_EMPHASIS_0: |
1564 | return EDP_LINK_TRAIN_800_1200MV_0DB_SNB_B; | |
e3421a18 | 1565 | default: |
3c5a62b5 YL |
1566 | DRM_DEBUG_KMS("Unsupported voltage swing/pre-emphasis level:" |
1567 | "0x%x\n", signal_levels); | |
1568 | return EDP_LINK_TRAIN_400_600MV_0DB_SNB_B; | |
e3421a18 ZW |
1569 | } |
1570 | } | |
1571 | ||
1a2eb460 KP |
1572 | /* Gen7's DP voltage swing and pre-emphasis control */ |
1573 | static uint32_t | |
1574 | intel_gen7_edp_signal_levels(uint8_t train_set) | |
1575 | { | |
1576 | int signal_levels = train_set & (DP_TRAIN_VOLTAGE_SWING_MASK | | |
1577 | DP_TRAIN_PRE_EMPHASIS_MASK); | |
1578 | switch (signal_levels) { | |
1579 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_0: | |
1580 | return EDP_LINK_TRAIN_400MV_0DB_IVB; | |
1581 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_3_5: | |
1582 | return EDP_LINK_TRAIN_400MV_3_5DB_IVB; | |
1583 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_6: | |
1584 | return EDP_LINK_TRAIN_400MV_6DB_IVB; | |
1585 | ||
1586 | case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_0: | |
1587 | return EDP_LINK_TRAIN_600MV_0DB_IVB; | |
1588 | case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_3_5: | |
1589 | return EDP_LINK_TRAIN_600MV_3_5DB_IVB; | |
1590 | ||
1591 | case DP_TRAIN_VOLTAGE_SWING_800 | DP_TRAIN_PRE_EMPHASIS_0: | |
1592 | return EDP_LINK_TRAIN_800MV_0DB_IVB; | |
1593 | case DP_TRAIN_VOLTAGE_SWING_800 | DP_TRAIN_PRE_EMPHASIS_3_5: | |
1594 | return EDP_LINK_TRAIN_800MV_3_5DB_IVB; | |
1595 | ||
1596 | default: | |
1597 | DRM_DEBUG_KMS("Unsupported voltage swing/pre-emphasis level:" | |
1598 | "0x%x\n", signal_levels); | |
1599 | return EDP_LINK_TRAIN_500MV_0DB_IVB; | |
1600 | } | |
1601 | } | |
1602 | ||
a4fc5ed6 KP |
1603 | static uint8_t |
1604 | intel_get_lane_status(uint8_t link_status[DP_LINK_STATUS_SIZE], | |
1605 | int lane) | |
1606 | { | |
a4fc5ed6 | 1607 | int s = (lane & 1) * 4; |
93f62dad | 1608 | uint8_t l = link_status[lane>>1]; |
a4fc5ed6 KP |
1609 | |
1610 | return (l >> s) & 0xf; | |
1611 | } | |
1612 | ||
1613 | /* Check for clock recovery is done on all channels */ | |
1614 | static bool | |
1615 | intel_clock_recovery_ok(uint8_t link_status[DP_LINK_STATUS_SIZE], int lane_count) | |
1616 | { | |
1617 | int lane; | |
1618 | uint8_t lane_status; | |
1619 | ||
1620 | for (lane = 0; lane < lane_count; lane++) { | |
1621 | lane_status = intel_get_lane_status(link_status, lane); | |
1622 | if ((lane_status & DP_LANE_CR_DONE) == 0) | |
1623 | return false; | |
1624 | } | |
1625 | return true; | |
1626 | } | |
1627 | ||
1628 | /* Check to see if channel eq is done on all channels */ | |
1629 | #define CHANNEL_EQ_BITS (DP_LANE_CR_DONE|\ | |
1630 | DP_LANE_CHANNEL_EQ_DONE|\ | |
1631 | DP_LANE_SYMBOL_LOCKED) | |
1632 | static bool | |
93f62dad | 1633 | intel_channel_eq_ok(struct intel_dp *intel_dp, uint8_t link_status[DP_LINK_STATUS_SIZE]) |
a4fc5ed6 KP |
1634 | { |
1635 | uint8_t lane_align; | |
1636 | uint8_t lane_status; | |
1637 | int lane; | |
1638 | ||
93f62dad | 1639 | lane_align = intel_dp_link_status(link_status, |
a4fc5ed6 KP |
1640 | DP_LANE_ALIGN_STATUS_UPDATED); |
1641 | if ((lane_align & DP_INTERLANE_ALIGN_DONE) == 0) | |
1642 | return false; | |
33a34e4e | 1643 | for (lane = 0; lane < intel_dp->lane_count; lane++) { |
93f62dad | 1644 | lane_status = intel_get_lane_status(link_status, lane); |
a4fc5ed6 KP |
1645 | if ((lane_status & CHANNEL_EQ_BITS) != CHANNEL_EQ_BITS) |
1646 | return false; | |
1647 | } | |
1648 | return true; | |
1649 | } | |
1650 | ||
1651 | static bool | |
ea5b213a | 1652 | intel_dp_set_link_train(struct intel_dp *intel_dp, |
a4fc5ed6 | 1653 | uint32_t dp_reg_value, |
58e10eb9 | 1654 | uint8_t dp_train_pat) |
a4fc5ed6 | 1655 | { |
4ef69c7a | 1656 | struct drm_device *dev = intel_dp->base.base.dev; |
a4fc5ed6 | 1657 | struct drm_i915_private *dev_priv = dev->dev_private; |
a4fc5ed6 KP |
1658 | int ret; |
1659 | ||
47ea7542 PZ |
1660 | if (HAS_PCH_CPT(dev) && (IS_GEN7(dev) || !is_cpu_edp(intel_dp))) { |
1661 | dp_reg_value &= ~DP_LINK_TRAIN_MASK_CPT; | |
1662 | ||
1663 | switch (dp_train_pat & DP_TRAINING_PATTERN_MASK) { | |
1664 | case DP_TRAINING_PATTERN_DISABLE: | |
1665 | dp_reg_value |= DP_LINK_TRAIN_OFF_CPT; | |
1666 | break; | |
1667 | case DP_TRAINING_PATTERN_1: | |
1668 | dp_reg_value |= DP_LINK_TRAIN_PAT_1_CPT; | |
1669 | break; | |
1670 | case DP_TRAINING_PATTERN_2: | |
1671 | dp_reg_value |= DP_LINK_TRAIN_PAT_2_CPT; | |
1672 | break; | |
1673 | case DP_TRAINING_PATTERN_3: | |
1674 | DRM_ERROR("DP training pattern 3 not supported\n"); | |
1675 | dp_reg_value |= DP_LINK_TRAIN_PAT_2_CPT; | |
1676 | break; | |
1677 | } | |
1678 | ||
1679 | } else { | |
1680 | dp_reg_value &= ~DP_LINK_TRAIN_MASK; | |
1681 | ||
1682 | switch (dp_train_pat & DP_TRAINING_PATTERN_MASK) { | |
1683 | case DP_TRAINING_PATTERN_DISABLE: | |
1684 | dp_reg_value |= DP_LINK_TRAIN_OFF; | |
1685 | break; | |
1686 | case DP_TRAINING_PATTERN_1: | |
1687 | dp_reg_value |= DP_LINK_TRAIN_PAT_1; | |
1688 | break; | |
1689 | case DP_TRAINING_PATTERN_2: | |
1690 | dp_reg_value |= DP_LINK_TRAIN_PAT_2; | |
1691 | break; | |
1692 | case DP_TRAINING_PATTERN_3: | |
1693 | DRM_ERROR("DP training pattern 3 not supported\n"); | |
1694 | dp_reg_value |= DP_LINK_TRAIN_PAT_2; | |
1695 | break; | |
1696 | } | |
1697 | } | |
1698 | ||
ea5b213a CW |
1699 | I915_WRITE(intel_dp->output_reg, dp_reg_value); |
1700 | POSTING_READ(intel_dp->output_reg); | |
a4fc5ed6 | 1701 | |
ea5b213a | 1702 | intel_dp_aux_native_write_1(intel_dp, |
a4fc5ed6 KP |
1703 | DP_TRAINING_PATTERN_SET, |
1704 | dp_train_pat); | |
1705 | ||
47ea7542 PZ |
1706 | if ((dp_train_pat & DP_TRAINING_PATTERN_MASK) != |
1707 | DP_TRAINING_PATTERN_DISABLE) { | |
1708 | ret = intel_dp_aux_native_write(intel_dp, | |
1709 | DP_TRAINING_LANE0_SET, | |
1710 | intel_dp->train_set, | |
1711 | intel_dp->lane_count); | |
1712 | if (ret != intel_dp->lane_count) | |
1713 | return false; | |
1714 | } | |
a4fc5ed6 KP |
1715 | |
1716 | return true; | |
1717 | } | |
1718 | ||
33a34e4e | 1719 | /* Enable corresponding port and start training pattern 1 */ |
a4fc5ed6 | 1720 | static void |
33a34e4e | 1721 | intel_dp_start_link_train(struct intel_dp *intel_dp) |
a4fc5ed6 | 1722 | { |
4ef69c7a | 1723 | struct drm_device *dev = intel_dp->base.base.dev; |
a4fc5ed6 KP |
1724 | int i; |
1725 | uint8_t voltage; | |
1726 | bool clock_recovery = false; | |
cdb0e95b | 1727 | int voltage_tries, loop_tries; |
ea5b213a | 1728 | uint32_t DP = intel_dp->DP; |
a4fc5ed6 | 1729 | |
3cf2efb1 CW |
1730 | /* Write the link configuration data */ |
1731 | intel_dp_aux_native_write(intel_dp, DP_LINK_BW_SET, | |
1732 | intel_dp->link_configuration, | |
1733 | DP_LINK_CONFIGURATION_SIZE); | |
a4fc5ed6 KP |
1734 | |
1735 | DP |= DP_PORT_EN; | |
1a2eb460 | 1736 | |
33a34e4e | 1737 | memset(intel_dp->train_set, 0, 4); |
a4fc5ed6 | 1738 | voltage = 0xff; |
cdb0e95b KP |
1739 | voltage_tries = 0; |
1740 | loop_tries = 0; | |
a4fc5ed6 KP |
1741 | clock_recovery = false; |
1742 | for (;;) { | |
33a34e4e | 1743 | /* Use intel_dp->train_set[0] to set the voltage and pre emphasis values */ |
93f62dad | 1744 | uint8_t link_status[DP_LINK_STATUS_SIZE]; |
e3421a18 | 1745 | uint32_t signal_levels; |
417e822d | 1746 | |
1a2eb460 KP |
1747 | |
1748 | if (IS_GEN7(dev) && is_cpu_edp(intel_dp)) { | |
1749 | signal_levels = intel_gen7_edp_signal_levels(intel_dp->train_set[0]); | |
1750 | DP = (DP & ~EDP_LINK_TRAIN_VOL_EMP_MASK_IVB) | signal_levels; | |
1751 | } else if (IS_GEN6(dev) && is_cpu_edp(intel_dp)) { | |
33a34e4e | 1752 | signal_levels = intel_gen6_edp_signal_levels(intel_dp->train_set[0]); |
e3421a18 ZW |
1753 | DP = (DP & ~EDP_LINK_TRAIN_VOL_EMP_MASK_SNB) | signal_levels; |
1754 | } else { | |
93f62dad KP |
1755 | signal_levels = intel_dp_signal_levels(intel_dp->train_set[0]); |
1756 | DRM_DEBUG_KMS("training pattern 1 signal levels %08x\n", signal_levels); | |
e3421a18 ZW |
1757 | DP = (DP & ~(DP_VOLTAGE_MASK|DP_PRE_EMPHASIS_MASK)) | signal_levels; |
1758 | } | |
a4fc5ed6 | 1759 | |
47ea7542 | 1760 | if (!intel_dp_set_link_train(intel_dp, DP, |
81055854 AJ |
1761 | DP_TRAINING_PATTERN_1 | |
1762 | DP_LINK_SCRAMBLING_DISABLE)) | |
a4fc5ed6 | 1763 | break; |
a4fc5ed6 KP |
1764 | /* Set training pattern 1 */ |
1765 | ||
3cf2efb1 | 1766 | udelay(100); |
93f62dad KP |
1767 | if (!intel_dp_get_link_status(intel_dp, link_status)) { |
1768 | DRM_ERROR("failed to get link status\n"); | |
a4fc5ed6 | 1769 | break; |
93f62dad | 1770 | } |
a4fc5ed6 | 1771 | |
93f62dad KP |
1772 | if (intel_clock_recovery_ok(link_status, intel_dp->lane_count)) { |
1773 | DRM_DEBUG_KMS("clock recovery OK\n"); | |
3cf2efb1 CW |
1774 | clock_recovery = true; |
1775 | break; | |
1776 | } | |
1777 | ||
1778 | /* Check to see if we've tried the max voltage */ | |
1779 | for (i = 0; i < intel_dp->lane_count; i++) | |
1780 | if ((intel_dp->train_set[i] & DP_TRAIN_MAX_SWING_REACHED) == 0) | |
a4fc5ed6 | 1781 | break; |
0d710688 | 1782 | if (i == intel_dp->lane_count && voltage_tries == 5) { |
cdb0e95b KP |
1783 | ++loop_tries; |
1784 | if (loop_tries == 5) { | |
1785 | DRM_DEBUG_KMS("too many full retries, give up\n"); | |
1786 | break; | |
1787 | } | |
1788 | memset(intel_dp->train_set, 0, 4); | |
1789 | voltage_tries = 0; | |
1790 | continue; | |
1791 | } | |
a4fc5ed6 | 1792 | |
3cf2efb1 CW |
1793 | /* Check to see if we've tried the same voltage 5 times */ |
1794 | if ((intel_dp->train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK) == voltage) { | |
cdb0e95b KP |
1795 | ++voltage_tries; |
1796 | if (voltage_tries == 5) { | |
1797 | DRM_DEBUG_KMS("too many voltage retries, give up\n"); | |
a4fc5ed6 | 1798 | break; |
cdb0e95b | 1799 | } |
3cf2efb1 | 1800 | } else |
cdb0e95b | 1801 | voltage_tries = 0; |
3cf2efb1 | 1802 | voltage = intel_dp->train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK; |
a4fc5ed6 | 1803 | |
3cf2efb1 | 1804 | /* Compute new intel_dp->train_set as requested by target */ |
93f62dad | 1805 | intel_get_adjust_train(intel_dp, link_status); |
a4fc5ed6 KP |
1806 | } |
1807 | ||
33a34e4e JB |
1808 | intel_dp->DP = DP; |
1809 | } | |
1810 | ||
1811 | static void | |
1812 | intel_dp_complete_link_train(struct intel_dp *intel_dp) | |
1813 | { | |
4ef69c7a | 1814 | struct drm_device *dev = intel_dp->base.base.dev; |
33a34e4e | 1815 | bool channel_eq = false; |
37f80975 | 1816 | int tries, cr_tries; |
33a34e4e JB |
1817 | uint32_t DP = intel_dp->DP; |
1818 | ||
a4fc5ed6 KP |
1819 | /* channel equalization */ |
1820 | tries = 0; | |
37f80975 | 1821 | cr_tries = 0; |
a4fc5ed6 KP |
1822 | channel_eq = false; |
1823 | for (;;) { | |
33a34e4e | 1824 | /* Use intel_dp->train_set[0] to set the voltage and pre emphasis values */ |
e3421a18 | 1825 | uint32_t signal_levels; |
93f62dad | 1826 | uint8_t link_status[DP_LINK_STATUS_SIZE]; |
e3421a18 | 1827 | |
37f80975 JB |
1828 | if (cr_tries > 5) { |
1829 | DRM_ERROR("failed to train DP, aborting\n"); | |
1830 | intel_dp_link_down(intel_dp); | |
1831 | break; | |
1832 | } | |
1833 | ||
1a2eb460 KP |
1834 | if (IS_GEN7(dev) && is_cpu_edp(intel_dp)) { |
1835 | signal_levels = intel_gen7_edp_signal_levels(intel_dp->train_set[0]); | |
1836 | DP = (DP & ~EDP_LINK_TRAIN_VOL_EMP_MASK_IVB) | signal_levels; | |
1837 | } else if (IS_GEN6(dev) && is_cpu_edp(intel_dp)) { | |
33a34e4e | 1838 | signal_levels = intel_gen6_edp_signal_levels(intel_dp->train_set[0]); |
e3421a18 ZW |
1839 | DP = (DP & ~EDP_LINK_TRAIN_VOL_EMP_MASK_SNB) | signal_levels; |
1840 | } else { | |
93f62dad | 1841 | signal_levels = intel_dp_signal_levels(intel_dp->train_set[0]); |
e3421a18 ZW |
1842 | DP = (DP & ~(DP_VOLTAGE_MASK|DP_PRE_EMPHASIS_MASK)) | signal_levels; |
1843 | } | |
1844 | ||
a4fc5ed6 | 1845 | /* channel eq pattern */ |
47ea7542 | 1846 | if (!intel_dp_set_link_train(intel_dp, DP, |
81055854 AJ |
1847 | DP_TRAINING_PATTERN_2 | |
1848 | DP_LINK_SCRAMBLING_DISABLE)) | |
a4fc5ed6 KP |
1849 | break; |
1850 | ||
3cf2efb1 | 1851 | udelay(400); |
93f62dad | 1852 | if (!intel_dp_get_link_status(intel_dp, link_status)) |
a4fc5ed6 | 1853 | break; |
a4fc5ed6 | 1854 | |
37f80975 | 1855 | /* Make sure clock is still ok */ |
93f62dad | 1856 | if (!intel_clock_recovery_ok(link_status, intel_dp->lane_count)) { |
37f80975 JB |
1857 | intel_dp_start_link_train(intel_dp); |
1858 | cr_tries++; | |
1859 | continue; | |
1860 | } | |
1861 | ||
93f62dad | 1862 | if (intel_channel_eq_ok(intel_dp, link_status)) { |
3cf2efb1 CW |
1863 | channel_eq = true; |
1864 | break; | |
1865 | } | |
a4fc5ed6 | 1866 | |
37f80975 JB |
1867 | /* Try 5 times, then try clock recovery if that fails */ |
1868 | if (tries > 5) { | |
1869 | intel_dp_link_down(intel_dp); | |
1870 | intel_dp_start_link_train(intel_dp); | |
1871 | tries = 0; | |
1872 | cr_tries++; | |
1873 | continue; | |
1874 | } | |
a4fc5ed6 | 1875 | |
3cf2efb1 | 1876 | /* Compute new intel_dp->train_set as requested by target */ |
93f62dad | 1877 | intel_get_adjust_train(intel_dp, link_status); |
3cf2efb1 | 1878 | ++tries; |
869184a6 | 1879 | } |
3cf2efb1 | 1880 | |
47ea7542 | 1881 | intel_dp_set_link_train(intel_dp, DP, DP_TRAINING_PATTERN_DISABLE); |
a4fc5ed6 KP |
1882 | } |
1883 | ||
1884 | static void | |
ea5b213a | 1885 | intel_dp_link_down(struct intel_dp *intel_dp) |
a4fc5ed6 | 1886 | { |
4ef69c7a | 1887 | struct drm_device *dev = intel_dp->base.base.dev; |
a4fc5ed6 | 1888 | struct drm_i915_private *dev_priv = dev->dev_private; |
ea5b213a | 1889 | uint32_t DP = intel_dp->DP; |
a4fc5ed6 | 1890 | |
1b39d6f3 CW |
1891 | if ((I915_READ(intel_dp->output_reg) & DP_PORT_EN) == 0) |
1892 | return; | |
1893 | ||
28c97730 | 1894 | DRM_DEBUG_KMS("\n"); |
32f9d658 | 1895 | |
cfcb0fc9 | 1896 | if (is_edp(intel_dp)) { |
32f9d658 | 1897 | DP &= ~DP_PLL_ENABLE; |
ea5b213a CW |
1898 | I915_WRITE(intel_dp->output_reg, DP); |
1899 | POSTING_READ(intel_dp->output_reg); | |
32f9d658 ZW |
1900 | udelay(100); |
1901 | } | |
1902 | ||
1a2eb460 | 1903 | if (HAS_PCH_CPT(dev) && (IS_GEN7(dev) || !is_cpu_edp(intel_dp))) { |
e3421a18 | 1904 | DP &= ~DP_LINK_TRAIN_MASK_CPT; |
ea5b213a | 1905 | I915_WRITE(intel_dp->output_reg, DP | DP_LINK_TRAIN_PAT_IDLE_CPT); |
e3421a18 ZW |
1906 | } else { |
1907 | DP &= ~DP_LINK_TRAIN_MASK; | |
ea5b213a | 1908 | I915_WRITE(intel_dp->output_reg, DP | DP_LINK_TRAIN_PAT_IDLE); |
e3421a18 | 1909 | } |
fe255d00 | 1910 | POSTING_READ(intel_dp->output_reg); |
5eb08b69 | 1911 | |
fe255d00 | 1912 | msleep(17); |
5eb08b69 | 1913 | |
417e822d | 1914 | if (is_edp(intel_dp)) { |
1a2eb460 | 1915 | if (HAS_PCH_CPT(dev) && (IS_GEN7(dev) || !is_cpu_edp(intel_dp))) |
417e822d KP |
1916 | DP |= DP_LINK_TRAIN_OFF_CPT; |
1917 | else | |
1918 | DP |= DP_LINK_TRAIN_OFF; | |
1919 | } | |
5bddd17f | 1920 | |
493a7081 | 1921 | if (HAS_PCH_IBX(dev) && |
1b39d6f3 | 1922 | I915_READ(intel_dp->output_reg) & DP_PIPEB_SELECT) { |
31acbcc4 CW |
1923 | struct drm_crtc *crtc = intel_dp->base.base.crtc; |
1924 | ||
5bddd17f EA |
1925 | /* Hardware workaround: leaving our transcoder select |
1926 | * set to transcoder B while it's off will prevent the | |
1927 | * corresponding HDMI output on transcoder A. | |
1928 | * | |
1929 | * Combine this with another hardware workaround: | |
1930 | * transcoder select bit can only be cleared while the | |
1931 | * port is enabled. | |
1932 | */ | |
1933 | DP &= ~DP_PIPEB_SELECT; | |
1934 | I915_WRITE(intel_dp->output_reg, DP); | |
1935 | ||
1936 | /* Changes to enable or select take place the vblank | |
1937 | * after being written. | |
1938 | */ | |
31acbcc4 CW |
1939 | if (crtc == NULL) { |
1940 | /* We can arrive here never having been attached | |
1941 | * to a CRTC, for instance, due to inheriting | |
1942 | * random state from the BIOS. | |
1943 | * | |
1944 | * If the pipe is not running, play safe and | |
1945 | * wait for the clocks to stabilise before | |
1946 | * continuing. | |
1947 | */ | |
1948 | POSTING_READ(intel_dp->output_reg); | |
1949 | msleep(50); | |
1950 | } else | |
1951 | intel_wait_for_vblank(dev, to_intel_crtc(crtc)->pipe); | |
5bddd17f EA |
1952 | } |
1953 | ||
832afda6 | 1954 | DP &= ~DP_AUDIO_OUTPUT_ENABLE; |
ea5b213a CW |
1955 | I915_WRITE(intel_dp->output_reg, DP & ~DP_PORT_EN); |
1956 | POSTING_READ(intel_dp->output_reg); | |
f01eca2e | 1957 | msleep(intel_dp->panel_power_down_delay); |
a4fc5ed6 KP |
1958 | } |
1959 | ||
26d61aad KP |
1960 | static bool |
1961 | intel_dp_get_dpcd(struct intel_dp *intel_dp) | |
92fd8fd1 | 1962 | { |
92fd8fd1 | 1963 | if (intel_dp_aux_native_read_retry(intel_dp, 0x000, intel_dp->dpcd, |
0206e353 | 1964 | sizeof(intel_dp->dpcd)) && |
92fd8fd1 | 1965 | (intel_dp->dpcd[DP_DPCD_REV] != 0)) { |
26d61aad | 1966 | return true; |
92fd8fd1 KP |
1967 | } |
1968 | ||
26d61aad | 1969 | return false; |
92fd8fd1 KP |
1970 | } |
1971 | ||
0d198328 AJ |
1972 | static void |
1973 | intel_dp_probe_oui(struct intel_dp *intel_dp) | |
1974 | { | |
1975 | u8 buf[3]; | |
1976 | ||
1977 | if (!(intel_dp->dpcd[DP_DOWN_STREAM_PORT_COUNT] & DP_OUI_SUPPORT)) | |
1978 | return; | |
1979 | ||
351cfc34 DV |
1980 | ironlake_edp_panel_vdd_on(intel_dp); |
1981 | ||
0d198328 AJ |
1982 | if (intel_dp_aux_native_read_retry(intel_dp, DP_SINK_OUI, buf, 3)) |
1983 | DRM_DEBUG_KMS("Sink OUI: %02hx%02hx%02hx\n", | |
1984 | buf[0], buf[1], buf[2]); | |
1985 | ||
1986 | if (intel_dp_aux_native_read_retry(intel_dp, DP_BRANCH_OUI, buf, 3)) | |
1987 | DRM_DEBUG_KMS("Branch OUI: %02hx%02hx%02hx\n", | |
1988 | buf[0], buf[1], buf[2]); | |
351cfc34 DV |
1989 | |
1990 | ironlake_edp_panel_vdd_off(intel_dp, false); | |
0d198328 AJ |
1991 | } |
1992 | ||
a60f0e38 JB |
1993 | static bool |
1994 | intel_dp_get_sink_irq(struct intel_dp *intel_dp, u8 *sink_irq_vector) | |
1995 | { | |
1996 | int ret; | |
1997 | ||
1998 | ret = intel_dp_aux_native_read_retry(intel_dp, | |
1999 | DP_DEVICE_SERVICE_IRQ_VECTOR, | |
2000 | sink_irq_vector, 1); | |
2001 | if (!ret) | |
2002 | return false; | |
2003 | ||
2004 | return true; | |
2005 | } | |
2006 | ||
2007 | static void | |
2008 | intel_dp_handle_test_request(struct intel_dp *intel_dp) | |
2009 | { | |
2010 | /* NAK by default */ | |
2011 | intel_dp_aux_native_write_1(intel_dp, DP_TEST_RESPONSE, DP_TEST_ACK); | |
2012 | } | |
2013 | ||
a4fc5ed6 KP |
2014 | /* |
2015 | * According to DP spec | |
2016 | * 5.1.2: | |
2017 | * 1. Read DPCD | |
2018 | * 2. Configure link according to Receiver Capabilities | |
2019 | * 3. Use Link Training from 2.5.3.3 and 3.5.1.3 | |
2020 | * 4. Check link status on receipt of hot-plug interrupt | |
2021 | */ | |
2022 | ||
2023 | static void | |
ea5b213a | 2024 | intel_dp_check_link_status(struct intel_dp *intel_dp) |
a4fc5ed6 | 2025 | { |
a60f0e38 | 2026 | u8 sink_irq_vector; |
93f62dad | 2027 | u8 link_status[DP_LINK_STATUS_SIZE]; |
a60f0e38 | 2028 | |
24e804ba | 2029 | if (!intel_dp->base.connectors_active) |
d2b996ac | 2030 | return; |
59cd09e1 | 2031 | |
24e804ba | 2032 | if (WARN_ON(!intel_dp->base.base.crtc)) |
a4fc5ed6 KP |
2033 | return; |
2034 | ||
92fd8fd1 | 2035 | /* Try to read receiver status if the link appears to be up */ |
93f62dad | 2036 | if (!intel_dp_get_link_status(intel_dp, link_status)) { |
ea5b213a | 2037 | intel_dp_link_down(intel_dp); |
a4fc5ed6 KP |
2038 | return; |
2039 | } | |
2040 | ||
92fd8fd1 | 2041 | /* Now read the DPCD to see if it's actually running */ |
26d61aad | 2042 | if (!intel_dp_get_dpcd(intel_dp)) { |
59cd09e1 JB |
2043 | intel_dp_link_down(intel_dp); |
2044 | return; | |
2045 | } | |
2046 | ||
a60f0e38 JB |
2047 | /* Try to read the source of the interrupt */ |
2048 | if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11 && | |
2049 | intel_dp_get_sink_irq(intel_dp, &sink_irq_vector)) { | |
2050 | /* Clear interrupt source */ | |
2051 | intel_dp_aux_native_write_1(intel_dp, | |
2052 | DP_DEVICE_SERVICE_IRQ_VECTOR, | |
2053 | sink_irq_vector); | |
2054 | ||
2055 | if (sink_irq_vector & DP_AUTOMATED_TEST_REQUEST) | |
2056 | intel_dp_handle_test_request(intel_dp); | |
2057 | if (sink_irq_vector & (DP_CP_IRQ | DP_SINK_SPECIFIC_IRQ)) | |
2058 | DRM_DEBUG_DRIVER("CP or sink specific irq unhandled\n"); | |
2059 | } | |
2060 | ||
93f62dad | 2061 | if (!intel_channel_eq_ok(intel_dp, link_status)) { |
92fd8fd1 KP |
2062 | DRM_DEBUG_KMS("%s: channel EQ not ok, retraining\n", |
2063 | drm_get_encoder_name(&intel_dp->base.base)); | |
33a34e4e JB |
2064 | intel_dp_start_link_train(intel_dp); |
2065 | intel_dp_complete_link_train(intel_dp); | |
2066 | } | |
a4fc5ed6 | 2067 | } |
a4fc5ed6 | 2068 | |
71ba9000 | 2069 | static enum drm_connector_status |
26d61aad | 2070 | intel_dp_detect_dpcd(struct intel_dp *intel_dp) |
71ba9000 | 2071 | { |
26d61aad KP |
2072 | if (intel_dp_get_dpcd(intel_dp)) |
2073 | return connector_status_connected; | |
2074 | return connector_status_disconnected; | |
71ba9000 AJ |
2075 | } |
2076 | ||
5eb08b69 | 2077 | static enum drm_connector_status |
a9756bb5 | 2078 | ironlake_dp_detect(struct intel_dp *intel_dp) |
5eb08b69 | 2079 | { |
5eb08b69 ZW |
2080 | enum drm_connector_status status; |
2081 | ||
fe16d949 CW |
2082 | /* Can't disconnect eDP, but you can close the lid... */ |
2083 | if (is_edp(intel_dp)) { | |
2084 | status = intel_panel_detect(intel_dp->base.base.dev); | |
2085 | if (status == connector_status_unknown) | |
2086 | status = connector_status_connected; | |
2087 | return status; | |
2088 | } | |
01cb9ea6 | 2089 | |
26d61aad | 2090 | return intel_dp_detect_dpcd(intel_dp); |
5eb08b69 ZW |
2091 | } |
2092 | ||
a4fc5ed6 | 2093 | static enum drm_connector_status |
a9756bb5 | 2094 | g4x_dp_detect(struct intel_dp *intel_dp) |
a4fc5ed6 | 2095 | { |
4ef69c7a | 2096 | struct drm_device *dev = intel_dp->base.base.dev; |
a4fc5ed6 | 2097 | struct drm_i915_private *dev_priv = dev->dev_private; |
10f76a38 | 2098 | uint32_t bit; |
5eb08b69 | 2099 | |
ea5b213a | 2100 | switch (intel_dp->output_reg) { |
a4fc5ed6 | 2101 | case DP_B: |
10f76a38 | 2102 | bit = DPB_HOTPLUG_LIVE_STATUS; |
a4fc5ed6 KP |
2103 | break; |
2104 | case DP_C: | |
10f76a38 | 2105 | bit = DPC_HOTPLUG_LIVE_STATUS; |
a4fc5ed6 KP |
2106 | break; |
2107 | case DP_D: | |
10f76a38 | 2108 | bit = DPD_HOTPLUG_LIVE_STATUS; |
a4fc5ed6 KP |
2109 | break; |
2110 | default: | |
2111 | return connector_status_unknown; | |
2112 | } | |
2113 | ||
10f76a38 | 2114 | if ((I915_READ(PORT_HOTPLUG_STAT) & bit) == 0) |
a4fc5ed6 KP |
2115 | return connector_status_disconnected; |
2116 | ||
26d61aad | 2117 | return intel_dp_detect_dpcd(intel_dp); |
a9756bb5 ZW |
2118 | } |
2119 | ||
8c241fef KP |
2120 | static struct edid * |
2121 | intel_dp_get_edid(struct drm_connector *connector, struct i2c_adapter *adapter) | |
2122 | { | |
2123 | struct intel_dp *intel_dp = intel_attached_dp(connector); | |
2124 | struct edid *edid; | |
d6f24d0f JB |
2125 | int size; |
2126 | ||
2127 | if (is_edp(intel_dp)) { | |
2128 | if (!intel_dp->edid) | |
2129 | return NULL; | |
2130 | ||
2131 | size = (intel_dp->edid->extensions + 1) * EDID_LENGTH; | |
2132 | edid = kmalloc(size, GFP_KERNEL); | |
2133 | if (!edid) | |
2134 | return NULL; | |
2135 | ||
2136 | memcpy(edid, intel_dp->edid, size); | |
2137 | return edid; | |
2138 | } | |
8c241fef | 2139 | |
8c241fef | 2140 | edid = drm_get_edid(connector, adapter); |
8c241fef KP |
2141 | return edid; |
2142 | } | |
2143 | ||
2144 | static int | |
2145 | intel_dp_get_edid_modes(struct drm_connector *connector, struct i2c_adapter *adapter) | |
2146 | { | |
2147 | struct intel_dp *intel_dp = intel_attached_dp(connector); | |
2148 | int ret; | |
2149 | ||
d6f24d0f JB |
2150 | if (is_edp(intel_dp)) { |
2151 | drm_mode_connector_update_edid_property(connector, | |
2152 | intel_dp->edid); | |
2153 | ret = drm_add_edid_modes(connector, intel_dp->edid); | |
2154 | drm_edid_to_eld(connector, | |
2155 | intel_dp->edid); | |
d6f24d0f JB |
2156 | return intel_dp->edid_mode_count; |
2157 | } | |
2158 | ||
8c241fef | 2159 | ret = intel_ddc_get_modes(connector, adapter); |
8c241fef KP |
2160 | return ret; |
2161 | } | |
2162 | ||
2163 | ||
a9756bb5 ZW |
2164 | /** |
2165 | * Uses CRT_HOTPLUG_EN and CRT_HOTPLUG_STAT to detect DP connection. | |
2166 | * | |
2167 | * \return true if DP port is connected. | |
2168 | * \return false if DP port is disconnected. | |
2169 | */ | |
2170 | static enum drm_connector_status | |
2171 | intel_dp_detect(struct drm_connector *connector, bool force) | |
2172 | { | |
2173 | struct intel_dp *intel_dp = intel_attached_dp(connector); | |
2174 | struct drm_device *dev = intel_dp->base.base.dev; | |
2175 | enum drm_connector_status status; | |
2176 | struct edid *edid = NULL; | |
2177 | ||
2178 | intel_dp->has_audio = false; | |
2179 | ||
2180 | if (HAS_PCH_SPLIT(dev)) | |
2181 | status = ironlake_dp_detect(intel_dp); | |
2182 | else | |
2183 | status = g4x_dp_detect(intel_dp); | |
1b9be9d0 | 2184 | |
ac66ae83 AJ |
2185 | DRM_DEBUG_KMS("DPCD: %02hx%02hx%02hx%02hx%02hx%02hx%02hx%02hx\n", |
2186 | intel_dp->dpcd[0], intel_dp->dpcd[1], intel_dp->dpcd[2], | |
2187 | intel_dp->dpcd[3], intel_dp->dpcd[4], intel_dp->dpcd[5], | |
2188 | intel_dp->dpcd[6], intel_dp->dpcd[7]); | |
1b9be9d0 | 2189 | |
a9756bb5 ZW |
2190 | if (status != connector_status_connected) |
2191 | return status; | |
2192 | ||
0d198328 AJ |
2193 | intel_dp_probe_oui(intel_dp); |
2194 | ||
c3e5f67b DV |
2195 | if (intel_dp->force_audio != HDMI_AUDIO_AUTO) { |
2196 | intel_dp->has_audio = (intel_dp->force_audio == HDMI_AUDIO_ON); | |
f684960e | 2197 | } else { |
8c241fef | 2198 | edid = intel_dp_get_edid(connector, &intel_dp->adapter); |
f684960e CW |
2199 | if (edid) { |
2200 | intel_dp->has_audio = drm_detect_monitor_audio(edid); | |
f684960e CW |
2201 | kfree(edid); |
2202 | } | |
a9756bb5 ZW |
2203 | } |
2204 | ||
2205 | return connector_status_connected; | |
a4fc5ed6 KP |
2206 | } |
2207 | ||
2208 | static int intel_dp_get_modes(struct drm_connector *connector) | |
2209 | { | |
df0e9248 | 2210 | struct intel_dp *intel_dp = intel_attached_dp(connector); |
4ef69c7a | 2211 | struct drm_device *dev = intel_dp->base.base.dev; |
32f9d658 ZW |
2212 | struct drm_i915_private *dev_priv = dev->dev_private; |
2213 | int ret; | |
a4fc5ed6 KP |
2214 | |
2215 | /* We should parse the EDID data and find out if it has an audio sink | |
2216 | */ | |
2217 | ||
8c241fef | 2218 | ret = intel_dp_get_edid_modes(connector, &intel_dp->adapter); |
b9efc480 | 2219 | if (ret) { |
d15456de | 2220 | if (is_edp(intel_dp) && !intel_dp->panel_fixed_mode) { |
b9efc480 ZY |
2221 | struct drm_display_mode *newmode; |
2222 | list_for_each_entry(newmode, &connector->probed_modes, | |
2223 | head) { | |
d15456de KP |
2224 | if ((newmode->type & DRM_MODE_TYPE_PREFERRED)) { |
2225 | intel_dp->panel_fixed_mode = | |
b9efc480 ZY |
2226 | drm_mode_duplicate(dev, newmode); |
2227 | break; | |
2228 | } | |
2229 | } | |
2230 | } | |
32f9d658 | 2231 | return ret; |
b9efc480 | 2232 | } |
32f9d658 ZW |
2233 | |
2234 | /* if eDP has no EDID, try to use fixed panel mode from VBT */ | |
4d926461 | 2235 | if (is_edp(intel_dp)) { |
47f0eb22 | 2236 | /* initialize panel mode from VBT if available for eDP */ |
d15456de KP |
2237 | if (intel_dp->panel_fixed_mode == NULL && dev_priv->lfp_lvds_vbt_mode != NULL) { |
2238 | intel_dp->panel_fixed_mode = | |
47f0eb22 | 2239 | drm_mode_duplicate(dev, dev_priv->lfp_lvds_vbt_mode); |
d15456de KP |
2240 | if (intel_dp->panel_fixed_mode) { |
2241 | intel_dp->panel_fixed_mode->type |= | |
47f0eb22 KP |
2242 | DRM_MODE_TYPE_PREFERRED; |
2243 | } | |
2244 | } | |
d15456de | 2245 | if (intel_dp->panel_fixed_mode) { |
32f9d658 | 2246 | struct drm_display_mode *mode; |
d15456de | 2247 | mode = drm_mode_duplicate(dev, intel_dp->panel_fixed_mode); |
32f9d658 ZW |
2248 | drm_mode_probed_add(connector, mode); |
2249 | return 1; | |
2250 | } | |
2251 | } | |
2252 | return 0; | |
a4fc5ed6 KP |
2253 | } |
2254 | ||
1aad7ac0 CW |
2255 | static bool |
2256 | intel_dp_detect_audio(struct drm_connector *connector) | |
2257 | { | |
2258 | struct intel_dp *intel_dp = intel_attached_dp(connector); | |
2259 | struct edid *edid; | |
2260 | bool has_audio = false; | |
2261 | ||
8c241fef | 2262 | edid = intel_dp_get_edid(connector, &intel_dp->adapter); |
1aad7ac0 CW |
2263 | if (edid) { |
2264 | has_audio = drm_detect_monitor_audio(edid); | |
1aad7ac0 CW |
2265 | kfree(edid); |
2266 | } | |
2267 | ||
2268 | return has_audio; | |
2269 | } | |
2270 | ||
f684960e CW |
2271 | static int |
2272 | intel_dp_set_property(struct drm_connector *connector, | |
2273 | struct drm_property *property, | |
2274 | uint64_t val) | |
2275 | { | |
e953fd7b | 2276 | struct drm_i915_private *dev_priv = connector->dev->dev_private; |
f684960e CW |
2277 | struct intel_dp *intel_dp = intel_attached_dp(connector); |
2278 | int ret; | |
2279 | ||
2280 | ret = drm_connector_property_set_value(connector, property, val); | |
2281 | if (ret) | |
2282 | return ret; | |
2283 | ||
3f43c48d | 2284 | if (property == dev_priv->force_audio_property) { |
1aad7ac0 CW |
2285 | int i = val; |
2286 | bool has_audio; | |
2287 | ||
2288 | if (i == intel_dp->force_audio) | |
f684960e CW |
2289 | return 0; |
2290 | ||
1aad7ac0 | 2291 | intel_dp->force_audio = i; |
f684960e | 2292 | |
c3e5f67b | 2293 | if (i == HDMI_AUDIO_AUTO) |
1aad7ac0 CW |
2294 | has_audio = intel_dp_detect_audio(connector); |
2295 | else | |
c3e5f67b | 2296 | has_audio = (i == HDMI_AUDIO_ON); |
1aad7ac0 CW |
2297 | |
2298 | if (has_audio == intel_dp->has_audio) | |
f684960e CW |
2299 | return 0; |
2300 | ||
1aad7ac0 | 2301 | intel_dp->has_audio = has_audio; |
f684960e CW |
2302 | goto done; |
2303 | } | |
2304 | ||
e953fd7b CW |
2305 | if (property == dev_priv->broadcast_rgb_property) { |
2306 | if (val == !!intel_dp->color_range) | |
2307 | return 0; | |
2308 | ||
2309 | intel_dp->color_range = val ? DP_COLOR_RANGE_16_235 : 0; | |
2310 | goto done; | |
2311 | } | |
2312 | ||
f684960e CW |
2313 | return -EINVAL; |
2314 | ||
2315 | done: | |
2316 | if (intel_dp->base.base.crtc) { | |
2317 | struct drm_crtc *crtc = intel_dp->base.base.crtc; | |
a6778b3c DV |
2318 | intel_set_mode(crtc, &crtc->mode, |
2319 | crtc->x, crtc->y, crtc->fb); | |
f684960e CW |
2320 | } |
2321 | ||
2322 | return 0; | |
2323 | } | |
2324 | ||
a4fc5ed6 | 2325 | static void |
0206e353 | 2326 | intel_dp_destroy(struct drm_connector *connector) |
a4fc5ed6 | 2327 | { |
aaa6fd2a MG |
2328 | struct drm_device *dev = connector->dev; |
2329 | ||
2330 | if (intel_dpd_is_edp(dev)) | |
2331 | intel_panel_destroy_backlight(dev); | |
2332 | ||
a4fc5ed6 KP |
2333 | drm_sysfs_connector_remove(connector); |
2334 | drm_connector_cleanup(connector); | |
55f78c43 | 2335 | kfree(connector); |
a4fc5ed6 KP |
2336 | } |
2337 | ||
24d05927 DV |
2338 | static void intel_dp_encoder_destroy(struct drm_encoder *encoder) |
2339 | { | |
2340 | struct intel_dp *intel_dp = enc_to_intel_dp(encoder); | |
2341 | ||
2342 | i2c_del_adapter(&intel_dp->adapter); | |
2343 | drm_encoder_cleanup(encoder); | |
bd943159 | 2344 | if (is_edp(intel_dp)) { |
d6f24d0f | 2345 | kfree(intel_dp->edid); |
bd943159 KP |
2346 | cancel_delayed_work_sync(&intel_dp->panel_vdd_work); |
2347 | ironlake_panel_vdd_off_sync(intel_dp); | |
2348 | } | |
24d05927 DV |
2349 | kfree(intel_dp); |
2350 | } | |
2351 | ||
a4fc5ed6 | 2352 | static const struct drm_encoder_helper_funcs intel_dp_helper_funcs = { |
a4fc5ed6 | 2353 | .mode_fixup = intel_dp_mode_fixup, |
a4fc5ed6 | 2354 | .mode_set = intel_dp_mode_set, |
1f703855 | 2355 | .disable = intel_encoder_noop, |
a4fc5ed6 KP |
2356 | }; |
2357 | ||
2358 | static const struct drm_connector_funcs intel_dp_connector_funcs = { | |
2bd2ad64 | 2359 | .dpms = intel_connector_dpms, |
a4fc5ed6 KP |
2360 | .detect = intel_dp_detect, |
2361 | .fill_modes = drm_helper_probe_single_connector_modes, | |
f684960e | 2362 | .set_property = intel_dp_set_property, |
a4fc5ed6 KP |
2363 | .destroy = intel_dp_destroy, |
2364 | }; | |
2365 | ||
2366 | static const struct drm_connector_helper_funcs intel_dp_connector_helper_funcs = { | |
2367 | .get_modes = intel_dp_get_modes, | |
2368 | .mode_valid = intel_dp_mode_valid, | |
df0e9248 | 2369 | .best_encoder = intel_best_encoder, |
a4fc5ed6 KP |
2370 | }; |
2371 | ||
a4fc5ed6 | 2372 | static const struct drm_encoder_funcs intel_dp_enc_funcs = { |
24d05927 | 2373 | .destroy = intel_dp_encoder_destroy, |
a4fc5ed6 KP |
2374 | }; |
2375 | ||
995b6762 | 2376 | static void |
21d40d37 | 2377 | intel_dp_hot_plug(struct intel_encoder *intel_encoder) |
c8110e52 | 2378 | { |
ea5b213a | 2379 | struct intel_dp *intel_dp = container_of(intel_encoder, struct intel_dp, base); |
c8110e52 | 2380 | |
885a5014 | 2381 | intel_dp_check_link_status(intel_dp); |
c8110e52 | 2382 | } |
6207937d | 2383 | |
e3421a18 ZW |
2384 | /* Return which DP Port should be selected for Transcoder DP control */ |
2385 | int | |
0206e353 | 2386 | intel_trans_dp_port_sel(struct drm_crtc *crtc) |
e3421a18 ZW |
2387 | { |
2388 | struct drm_device *dev = crtc->dev; | |
6c2b7c12 | 2389 | struct intel_encoder *encoder; |
e3421a18 | 2390 | |
6c2b7c12 DV |
2391 | for_each_encoder_on_crtc(dev, crtc, encoder) { |
2392 | struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base); | |
e3421a18 | 2393 | |
417e822d KP |
2394 | if (intel_dp->base.type == INTEL_OUTPUT_DISPLAYPORT || |
2395 | intel_dp->base.type == INTEL_OUTPUT_EDP) | |
ea5b213a | 2396 | return intel_dp->output_reg; |
e3421a18 | 2397 | } |
ea5b213a | 2398 | |
e3421a18 ZW |
2399 | return -1; |
2400 | } | |
2401 | ||
36e83a18 | 2402 | /* check the VBT to see whether the eDP is on DP-D port */ |
cb0953d7 | 2403 | bool intel_dpd_is_edp(struct drm_device *dev) |
36e83a18 ZY |
2404 | { |
2405 | struct drm_i915_private *dev_priv = dev->dev_private; | |
2406 | struct child_device_config *p_child; | |
2407 | int i; | |
2408 | ||
2409 | if (!dev_priv->child_dev_num) | |
2410 | return false; | |
2411 | ||
2412 | for (i = 0; i < dev_priv->child_dev_num; i++) { | |
2413 | p_child = dev_priv->child_dev + i; | |
2414 | ||
2415 | if (p_child->dvo_port == PORT_IDPD && | |
2416 | p_child->device_type == DEVICE_TYPE_eDP) | |
2417 | return true; | |
2418 | } | |
2419 | return false; | |
2420 | } | |
2421 | ||
f684960e CW |
2422 | static void |
2423 | intel_dp_add_properties(struct intel_dp *intel_dp, struct drm_connector *connector) | |
2424 | { | |
3f43c48d | 2425 | intel_attach_force_audio_property(connector); |
e953fd7b | 2426 | intel_attach_broadcast_rgb_property(connector); |
f684960e CW |
2427 | } |
2428 | ||
a4fc5ed6 | 2429 | void |
ab9d7c30 | 2430 | intel_dp_init(struct drm_device *dev, int output_reg, enum port port) |
a4fc5ed6 KP |
2431 | { |
2432 | struct drm_i915_private *dev_priv = dev->dev_private; | |
2433 | struct drm_connector *connector; | |
ea5b213a | 2434 | struct intel_dp *intel_dp; |
21d40d37 | 2435 | struct intel_encoder *intel_encoder; |
55f78c43 | 2436 | struct intel_connector *intel_connector; |
5eb08b69 | 2437 | const char *name = NULL; |
b329530c | 2438 | int type; |
a4fc5ed6 | 2439 | |
ea5b213a CW |
2440 | intel_dp = kzalloc(sizeof(struct intel_dp), GFP_KERNEL); |
2441 | if (!intel_dp) | |
a4fc5ed6 KP |
2442 | return; |
2443 | ||
3d3dc149 | 2444 | intel_dp->output_reg = output_reg; |
ab9d7c30 | 2445 | intel_dp->port = port; |
3d3dc149 | 2446 | |
55f78c43 ZW |
2447 | intel_connector = kzalloc(sizeof(struct intel_connector), GFP_KERNEL); |
2448 | if (!intel_connector) { | |
ea5b213a | 2449 | kfree(intel_dp); |
55f78c43 ZW |
2450 | return; |
2451 | } | |
ea5b213a | 2452 | intel_encoder = &intel_dp->base; |
55f78c43 | 2453 | |
ea5b213a | 2454 | if (HAS_PCH_SPLIT(dev) && output_reg == PCH_DP_D) |
b329530c | 2455 | if (intel_dpd_is_edp(dev)) |
ea5b213a | 2456 | intel_dp->is_pch_edp = true; |
b329530c | 2457 | |
cfcb0fc9 | 2458 | if (output_reg == DP_A || is_pch_edp(intel_dp)) { |
b329530c AJ |
2459 | type = DRM_MODE_CONNECTOR_eDP; |
2460 | intel_encoder->type = INTEL_OUTPUT_EDP; | |
2461 | } else { | |
2462 | type = DRM_MODE_CONNECTOR_DisplayPort; | |
2463 | intel_encoder->type = INTEL_OUTPUT_DISPLAYPORT; | |
2464 | } | |
2465 | ||
55f78c43 | 2466 | connector = &intel_connector->base; |
b329530c | 2467 | drm_connector_init(dev, connector, &intel_dp_connector_funcs, type); |
a4fc5ed6 KP |
2468 | drm_connector_helper_add(connector, &intel_dp_connector_helper_funcs); |
2469 | ||
eb1f8e4f DA |
2470 | connector->polled = DRM_CONNECTOR_POLL_HPD; |
2471 | ||
66a9278e | 2472 | intel_encoder->cloneable = false; |
f8aed700 | 2473 | |
66a9278e DV |
2474 | INIT_DELAYED_WORK(&intel_dp->panel_vdd_work, |
2475 | ironlake_panel_vdd_work); | |
6251ec0a | 2476 | |
27f8227b | 2477 | intel_encoder->crtc_mask = (1 << 0) | (1 << 1) | (1 << 2); |
ee7b9f93 | 2478 | |
a4fc5ed6 KP |
2479 | connector->interlace_allowed = true; |
2480 | connector->doublescan_allowed = 0; | |
2481 | ||
4ef69c7a | 2482 | drm_encoder_init(dev, &intel_encoder->base, &intel_dp_enc_funcs, |
a4fc5ed6 | 2483 | DRM_MODE_ENCODER_TMDS); |
4ef69c7a | 2484 | drm_encoder_helper_add(&intel_encoder->base, &intel_dp_helper_funcs); |
a4fc5ed6 | 2485 | |
df0e9248 | 2486 | intel_connector_attach_encoder(intel_connector, intel_encoder); |
a4fc5ed6 KP |
2487 | drm_sysfs_connector_add(connector); |
2488 | ||
e8cb4558 | 2489 | intel_encoder->enable = intel_enable_dp; |
2bd2ad64 | 2490 | intel_encoder->pre_enable = intel_pre_enable_dp; |
e8cb4558 | 2491 | intel_encoder->disable = intel_disable_dp; |
2bd2ad64 | 2492 | intel_encoder->post_disable = intel_post_disable_dp; |
19d8fe15 DV |
2493 | intel_encoder->get_hw_state = intel_dp_get_hw_state; |
2494 | intel_connector->get_hw_state = intel_connector_get_hw_state; | |
e8cb4558 | 2495 | |
a4fc5ed6 | 2496 | /* Set up the DDC bus. */ |
ab9d7c30 PZ |
2497 | switch (port) { |
2498 | case PORT_A: | |
2499 | name = "DPDDC-A"; | |
2500 | break; | |
2501 | case PORT_B: | |
2502 | dev_priv->hotplug_supported_mask |= DPB_HOTPLUG_INT_STATUS; | |
2503 | name = "DPDDC-B"; | |
2504 | break; | |
2505 | case PORT_C: | |
2506 | dev_priv->hotplug_supported_mask |= DPC_HOTPLUG_INT_STATUS; | |
2507 | name = "DPDDC-C"; | |
2508 | break; | |
2509 | case PORT_D: | |
2510 | dev_priv->hotplug_supported_mask |= DPD_HOTPLUG_INT_STATUS; | |
2511 | name = "DPDDC-D"; | |
2512 | break; | |
2513 | default: | |
2514 | WARN(1, "Invalid port %c\n", port_name(port)); | |
2515 | break; | |
5eb08b69 ZW |
2516 | } |
2517 | ||
d6f24d0f JB |
2518 | intel_dp_i2c_init(intel_dp, intel_connector, name); |
2519 | ||
89667383 JB |
2520 | /* Cache some DPCD data in the eDP case */ |
2521 | if (is_edp(intel_dp)) { | |
59f3e272 | 2522 | bool ret; |
f01eca2e KP |
2523 | struct edp_power_seq cur, vbt; |
2524 | u32 pp_on, pp_off, pp_div; | |
d6f24d0f | 2525 | struct edid *edid; |
5d613501 JB |
2526 | |
2527 | pp_on = I915_READ(PCH_PP_ON_DELAYS); | |
f01eca2e | 2528 | pp_off = I915_READ(PCH_PP_OFF_DELAYS); |
5d613501 | 2529 | pp_div = I915_READ(PCH_PP_DIVISOR); |
89667383 | 2530 | |
bfa3384a JB |
2531 | if (!pp_on || !pp_off || !pp_div) { |
2532 | DRM_INFO("bad panel power sequencing delays, disabling panel\n"); | |
2533 | intel_dp_encoder_destroy(&intel_dp->base.base); | |
2534 | intel_dp_destroy(&intel_connector->base); | |
2535 | return; | |
2536 | } | |
2537 | ||
f01eca2e KP |
2538 | /* Pull timing values out of registers */ |
2539 | cur.t1_t3 = (pp_on & PANEL_POWER_UP_DELAY_MASK) >> | |
2540 | PANEL_POWER_UP_DELAY_SHIFT; | |
2541 | ||
2542 | cur.t8 = (pp_on & PANEL_LIGHT_ON_DELAY_MASK) >> | |
2543 | PANEL_LIGHT_ON_DELAY_SHIFT; | |
f2e8b18a | 2544 | |
f01eca2e KP |
2545 | cur.t9 = (pp_off & PANEL_LIGHT_OFF_DELAY_MASK) >> |
2546 | PANEL_LIGHT_OFF_DELAY_SHIFT; | |
2547 | ||
2548 | cur.t10 = (pp_off & PANEL_POWER_DOWN_DELAY_MASK) >> | |
2549 | PANEL_POWER_DOWN_DELAY_SHIFT; | |
2550 | ||
2551 | cur.t11_t12 = ((pp_div & PANEL_POWER_CYCLE_DELAY_MASK) >> | |
2552 | PANEL_POWER_CYCLE_DELAY_SHIFT) * 1000; | |
2553 | ||
2554 | DRM_DEBUG_KMS("cur t1_t3 %d t8 %d t9 %d t10 %d t11_t12 %d\n", | |
2555 | cur.t1_t3, cur.t8, cur.t9, cur.t10, cur.t11_t12); | |
2556 | ||
2557 | vbt = dev_priv->edp.pps; | |
2558 | ||
2559 | DRM_DEBUG_KMS("vbt t1_t3 %d t8 %d t9 %d t10 %d t11_t12 %d\n", | |
2560 | vbt.t1_t3, vbt.t8, vbt.t9, vbt.t10, vbt.t11_t12); | |
2561 | ||
2562 | #define get_delay(field) ((max(cur.field, vbt.field) + 9) / 10) | |
2563 | ||
2564 | intel_dp->panel_power_up_delay = get_delay(t1_t3); | |
2565 | intel_dp->backlight_on_delay = get_delay(t8); | |
2566 | intel_dp->backlight_off_delay = get_delay(t9); | |
2567 | intel_dp->panel_power_down_delay = get_delay(t10); | |
2568 | intel_dp->panel_power_cycle_delay = get_delay(t11_t12); | |
2569 | ||
2570 | DRM_DEBUG_KMS("panel power up delay %d, power down delay %d, power cycle delay %d\n", | |
2571 | intel_dp->panel_power_up_delay, intel_dp->panel_power_down_delay, | |
2572 | intel_dp->panel_power_cycle_delay); | |
2573 | ||
2574 | DRM_DEBUG_KMS("backlight on delay %d, off delay %d\n", | |
2575 | intel_dp->backlight_on_delay, intel_dp->backlight_off_delay); | |
5d613501 JB |
2576 | |
2577 | ironlake_edp_panel_vdd_on(intel_dp); | |
59f3e272 | 2578 | ret = intel_dp_get_dpcd(intel_dp); |
bd943159 | 2579 | ironlake_edp_panel_vdd_off(intel_dp, false); |
99ea7127 | 2580 | |
59f3e272 | 2581 | if (ret) { |
7183dc29 JB |
2582 | if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11) |
2583 | dev_priv->no_aux_handshake = | |
2584 | intel_dp->dpcd[DP_MAX_DOWNSPREAD] & | |
89667383 JB |
2585 | DP_NO_AUX_HANDSHAKE_LINK_TRAINING; |
2586 | } else { | |
3d3dc149 | 2587 | /* if this fails, presume the device is a ghost */ |
48898b03 | 2588 | DRM_INFO("failed to retrieve link info, disabling eDP\n"); |
3d3dc149 | 2589 | intel_dp_encoder_destroy(&intel_dp->base.base); |
48898b03 | 2590 | intel_dp_destroy(&intel_connector->base); |
3d3dc149 | 2591 | return; |
89667383 | 2592 | } |
89667383 | 2593 | |
d6f24d0f JB |
2594 | ironlake_edp_panel_vdd_on(intel_dp); |
2595 | edid = drm_get_edid(connector, &intel_dp->adapter); | |
2596 | if (edid) { | |
2597 | drm_mode_connector_update_edid_property(connector, | |
2598 | edid); | |
2599 | intel_dp->edid_mode_count = | |
2600 | drm_add_edid_modes(connector, edid); | |
2601 | drm_edid_to_eld(connector, edid); | |
2602 | intel_dp->edid = edid; | |
2603 | } | |
2604 | ironlake_edp_panel_vdd_off(intel_dp, false); | |
2605 | } | |
552fb0b7 | 2606 | |
21d40d37 | 2607 | intel_encoder->hot_plug = intel_dp_hot_plug; |
a4fc5ed6 | 2608 | |
4d926461 | 2609 | if (is_edp(intel_dp)) { |
aaa6fd2a MG |
2610 | dev_priv->int_edp_connector = connector; |
2611 | intel_panel_setup_backlight(dev); | |
32f9d658 ZW |
2612 | } |
2613 | ||
f684960e CW |
2614 | intel_dp_add_properties(intel_dp, connector); |
2615 | ||
a4fc5ed6 KP |
2616 | /* For G4X desktop chip, PEG_BAND_GAP_DATA 3:0 must first be written |
2617 | * 0xd. Failure to do so will result in spurious interrupts being | |
2618 | * generated on the port when a cable is not attached. | |
2619 | */ | |
2620 | if (IS_G4X(dev) && !IS_GM45(dev)) { | |
2621 | u32 temp = I915_READ(PEG_BAND_GAP_DATA); | |
2622 | I915_WRITE(PEG_BAND_GAP_DATA, (temp & ~0xf) | 0xd); | |
2623 | } | |
2624 | } |