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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" | |
35 | #include "intel_drv.h" | |
36 | #include "i915_drm.h" | |
37 | #include "i915_drv.h" | |
ab2c0672 | 38 | #include "drm_dp_helper.h" |
a4fc5ed6 | 39 | |
a2006cf5 | 40 | #define DP_RECEIVER_CAP_SIZE 0xf |
a4fc5ed6 KP |
41 | #define DP_LINK_STATUS_SIZE 6 |
42 | #define DP_LINK_CHECK_TIMEOUT (10 * 1000) | |
43 | ||
44 | #define DP_LINK_CONFIGURATION_SIZE 9 | |
45 | ||
ea5b213a CW |
46 | struct intel_dp { |
47 | struct intel_encoder base; | |
a4fc5ed6 KP |
48 | uint32_t output_reg; |
49 | uint32_t DP; | |
50 | uint8_t link_configuration[DP_LINK_CONFIGURATION_SIZE]; | |
a4fc5ed6 | 51 | bool has_audio; |
f684960e | 52 | int force_audio; |
e953fd7b | 53 | uint32_t color_range; |
d2b996ac | 54 | int dpms_mode; |
a4fc5ed6 KP |
55 | uint8_t link_bw; |
56 | uint8_t lane_count; | |
a2006cf5 | 57 | uint8_t dpcd[DP_RECEIVER_CAP_SIZE]; |
a4fc5ed6 KP |
58 | struct i2c_adapter adapter; |
59 | struct i2c_algo_dp_aux_data algo; | |
f0917379 | 60 | bool is_pch_edp; |
33a34e4e | 61 | uint8_t train_set[4]; |
f01eca2e KP |
62 | int panel_power_up_delay; |
63 | int panel_power_down_delay; | |
64 | int panel_power_cycle_delay; | |
65 | int backlight_on_delay; | |
66 | int backlight_off_delay; | |
d15456de | 67 | struct drm_display_mode *panel_fixed_mode; /* for eDP */ |
bd943159 KP |
68 | struct delayed_work panel_vdd_work; |
69 | bool want_panel_vdd; | |
a4fc5ed6 KP |
70 | }; |
71 | ||
cfcb0fc9 JB |
72 | /** |
73 | * is_edp - is the given port attached to an eDP panel (either CPU or PCH) | |
74 | * @intel_dp: DP struct | |
75 | * | |
76 | * If a CPU or PCH DP output is attached to an eDP panel, this function | |
77 | * will return true, and false otherwise. | |
78 | */ | |
79 | static bool is_edp(struct intel_dp *intel_dp) | |
80 | { | |
81 | return intel_dp->base.type == INTEL_OUTPUT_EDP; | |
82 | } | |
83 | ||
84 | /** | |
85 | * is_pch_edp - is the port on the PCH and attached to an eDP panel? | |
86 | * @intel_dp: DP struct | |
87 | * | |
88 | * Returns true if the given DP struct corresponds to a PCH DP port attached | |
89 | * to an eDP panel, false otherwise. Helpful for determining whether we | |
90 | * may need FDI resources for a given DP output or not. | |
91 | */ | |
92 | static bool is_pch_edp(struct intel_dp *intel_dp) | |
93 | { | |
94 | return intel_dp->is_pch_edp; | |
95 | } | |
96 | ||
1c95822a AJ |
97 | /** |
98 | * is_cpu_edp - is the port on the CPU and attached to an eDP panel? | |
99 | * @intel_dp: DP struct | |
100 | * | |
101 | * Returns true if the given DP struct corresponds to a CPU eDP port. | |
102 | */ | |
103 | static bool is_cpu_edp(struct intel_dp *intel_dp) | |
104 | { | |
105 | return is_edp(intel_dp) && !is_pch_edp(intel_dp); | |
106 | } | |
107 | ||
ea5b213a CW |
108 | static struct intel_dp *enc_to_intel_dp(struct drm_encoder *encoder) |
109 | { | |
4ef69c7a | 110 | return container_of(encoder, struct intel_dp, base.base); |
ea5b213a | 111 | } |
a4fc5ed6 | 112 | |
df0e9248 CW |
113 | static struct intel_dp *intel_attached_dp(struct drm_connector *connector) |
114 | { | |
115 | return container_of(intel_attached_encoder(connector), | |
116 | struct intel_dp, base); | |
117 | } | |
118 | ||
814948ad JB |
119 | /** |
120 | * intel_encoder_is_pch_edp - is the given encoder a PCH attached eDP? | |
121 | * @encoder: DRM encoder | |
122 | * | |
123 | * Return true if @encoder corresponds to a PCH attached eDP panel. Needed | |
124 | * by intel_display.c. | |
125 | */ | |
126 | bool intel_encoder_is_pch_edp(struct drm_encoder *encoder) | |
127 | { | |
128 | struct intel_dp *intel_dp; | |
129 | ||
130 | if (!encoder) | |
131 | return false; | |
132 | ||
133 | intel_dp = enc_to_intel_dp(encoder); | |
134 | ||
135 | return is_pch_edp(intel_dp); | |
136 | } | |
137 | ||
33a34e4e JB |
138 | static void intel_dp_start_link_train(struct intel_dp *intel_dp); |
139 | static void intel_dp_complete_link_train(struct intel_dp *intel_dp); | |
ea5b213a | 140 | static void intel_dp_link_down(struct intel_dp *intel_dp); |
a4fc5ed6 | 141 | |
32f9d658 | 142 | void |
0206e353 | 143 | intel_edp_link_config(struct intel_encoder *intel_encoder, |
ea5b213a | 144 | int *lane_num, int *link_bw) |
32f9d658 | 145 | { |
ea5b213a | 146 | struct intel_dp *intel_dp = container_of(intel_encoder, struct intel_dp, base); |
32f9d658 | 147 | |
ea5b213a CW |
148 | *lane_num = intel_dp->lane_count; |
149 | if (intel_dp->link_bw == DP_LINK_BW_1_62) | |
32f9d658 | 150 | *link_bw = 162000; |
ea5b213a | 151 | else if (intel_dp->link_bw == DP_LINK_BW_2_7) |
32f9d658 ZW |
152 | *link_bw = 270000; |
153 | } | |
154 | ||
a4fc5ed6 | 155 | static int |
ea5b213a | 156 | intel_dp_max_lane_count(struct intel_dp *intel_dp) |
a4fc5ed6 | 157 | { |
9a10f401 KP |
158 | int max_lane_count = intel_dp->dpcd[DP_MAX_LANE_COUNT] & 0x1f; |
159 | switch (max_lane_count) { | |
160 | case 1: case 2: case 4: | |
161 | break; | |
162 | default: | |
163 | max_lane_count = 4; | |
a4fc5ed6 KP |
164 | } |
165 | return max_lane_count; | |
166 | } | |
167 | ||
168 | static int | |
ea5b213a | 169 | intel_dp_max_link_bw(struct intel_dp *intel_dp) |
a4fc5ed6 | 170 | { |
7183dc29 | 171 | int max_link_bw = intel_dp->dpcd[DP_MAX_LINK_RATE]; |
a4fc5ed6 KP |
172 | |
173 | switch (max_link_bw) { | |
174 | case DP_LINK_BW_1_62: | |
175 | case DP_LINK_BW_2_7: | |
176 | break; | |
177 | default: | |
178 | max_link_bw = DP_LINK_BW_1_62; | |
179 | break; | |
180 | } | |
181 | return max_link_bw; | |
182 | } | |
183 | ||
184 | static int | |
185 | intel_dp_link_clock(uint8_t link_bw) | |
186 | { | |
187 | if (link_bw == DP_LINK_BW_2_7) | |
188 | return 270000; | |
189 | else | |
190 | return 162000; | |
191 | } | |
192 | ||
cd9dde44 AJ |
193 | /* |
194 | * The units on the numbers in the next two are... bizarre. Examples will | |
195 | * make it clearer; this one parallels an example in the eDP spec. | |
196 | * | |
197 | * intel_dp_max_data_rate for one lane of 2.7GHz evaluates as: | |
198 | * | |
199 | * 270000 * 1 * 8 / 10 == 216000 | |
200 | * | |
201 | * The actual data capacity of that configuration is 2.16Gbit/s, so the | |
202 | * units are decakilobits. ->clock in a drm_display_mode is in kilohertz - | |
203 | * or equivalently, kilopixels per second - so for 1680x1050R it'd be | |
204 | * 119000. At 18bpp that's 2142000 kilobits per second. | |
205 | * | |
206 | * Thus the strange-looking division by 10 in intel_dp_link_required, to | |
207 | * get the result in decakilobits instead of kilobits. | |
208 | */ | |
209 | ||
a4fc5ed6 | 210 | static int |
3b5c78a3 | 211 | intel_dp_link_required(struct intel_dp *intel_dp, int pixel_clock, int check_bpp) |
a4fc5ed6 | 212 | { |
89c61432 JB |
213 | struct drm_crtc *crtc = intel_dp->base.base.crtc; |
214 | struct intel_crtc *intel_crtc = to_intel_crtc(crtc); | |
215 | int bpp = 24; | |
885a5fb5 | 216 | |
3b5c78a3 AJ |
217 | if (check_bpp) |
218 | bpp = check_bpp; | |
219 | else if (intel_crtc) | |
89c61432 JB |
220 | bpp = intel_crtc->bpp; |
221 | ||
cd9dde44 | 222 | return (pixel_clock * bpp + 9) / 10; |
a4fc5ed6 KP |
223 | } |
224 | ||
fe27d53e DA |
225 | static int |
226 | intel_dp_max_data_rate(int max_link_clock, int max_lanes) | |
227 | { | |
228 | return (max_link_clock * max_lanes * 8) / 10; | |
229 | } | |
230 | ||
a4fc5ed6 KP |
231 | static int |
232 | intel_dp_mode_valid(struct drm_connector *connector, | |
233 | struct drm_display_mode *mode) | |
234 | { | |
df0e9248 | 235 | struct intel_dp *intel_dp = intel_attached_dp(connector); |
ea5b213a CW |
236 | int max_link_clock = intel_dp_link_clock(intel_dp_max_link_bw(intel_dp)); |
237 | int max_lanes = intel_dp_max_lane_count(intel_dp); | |
3b5c78a3 | 238 | int max_rate, mode_rate; |
a4fc5ed6 | 239 | |
d15456de KP |
240 | if (is_edp(intel_dp) && intel_dp->panel_fixed_mode) { |
241 | if (mode->hdisplay > intel_dp->panel_fixed_mode->hdisplay) | |
7de56f43 ZY |
242 | return MODE_PANEL; |
243 | ||
d15456de | 244 | if (mode->vdisplay > intel_dp->panel_fixed_mode->vdisplay) |
7de56f43 ZY |
245 | return MODE_PANEL; |
246 | } | |
247 | ||
3b5c78a3 AJ |
248 | mode_rate = intel_dp_link_required(intel_dp, mode->clock, 0); |
249 | max_rate = intel_dp_max_data_rate(max_link_clock, max_lanes); | |
250 | ||
251 | if (mode_rate > max_rate) { | |
252 | mode_rate = intel_dp_link_required(intel_dp, | |
253 | mode->clock, 18); | |
254 | if (mode_rate > max_rate) | |
255 | return MODE_CLOCK_HIGH; | |
256 | else | |
257 | mode->private_flags |= INTEL_MODE_DP_FORCE_6BPC; | |
258 | } | |
a4fc5ed6 KP |
259 | |
260 | if (mode->clock < 10000) | |
261 | return MODE_CLOCK_LOW; | |
262 | ||
263 | return MODE_OK; | |
264 | } | |
265 | ||
266 | static uint32_t | |
267 | pack_aux(uint8_t *src, int src_bytes) | |
268 | { | |
269 | int i; | |
270 | uint32_t v = 0; | |
271 | ||
272 | if (src_bytes > 4) | |
273 | src_bytes = 4; | |
274 | for (i = 0; i < src_bytes; i++) | |
275 | v |= ((uint32_t) src[i]) << ((3-i) * 8); | |
276 | return v; | |
277 | } | |
278 | ||
279 | static void | |
280 | unpack_aux(uint32_t src, uint8_t *dst, int dst_bytes) | |
281 | { | |
282 | int i; | |
283 | if (dst_bytes > 4) | |
284 | dst_bytes = 4; | |
285 | for (i = 0; i < dst_bytes; i++) | |
286 | dst[i] = src >> ((3-i) * 8); | |
287 | } | |
288 | ||
fb0f8fbf KP |
289 | /* hrawclock is 1/4 the FSB frequency */ |
290 | static int | |
291 | intel_hrawclk(struct drm_device *dev) | |
292 | { | |
293 | struct drm_i915_private *dev_priv = dev->dev_private; | |
294 | uint32_t clkcfg; | |
295 | ||
296 | clkcfg = I915_READ(CLKCFG); | |
297 | switch (clkcfg & CLKCFG_FSB_MASK) { | |
298 | case CLKCFG_FSB_400: | |
299 | return 100; | |
300 | case CLKCFG_FSB_533: | |
301 | return 133; | |
302 | case CLKCFG_FSB_667: | |
303 | return 166; | |
304 | case CLKCFG_FSB_800: | |
305 | return 200; | |
306 | case CLKCFG_FSB_1067: | |
307 | return 266; | |
308 | case CLKCFG_FSB_1333: | |
309 | return 333; | |
310 | /* these two are just a guess; one of them might be right */ | |
311 | case CLKCFG_FSB_1600: | |
312 | case CLKCFG_FSB_1600_ALT: | |
313 | return 400; | |
314 | default: | |
315 | return 133; | |
316 | } | |
317 | } | |
318 | ||
ebf33b18 KP |
319 | static bool ironlake_edp_have_panel_power(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_STATUS) & PP_ON) != 0; | |
325 | } | |
326 | ||
327 | static bool ironlake_edp_have_panel_vdd(struct intel_dp *intel_dp) | |
328 | { | |
329 | struct drm_device *dev = intel_dp->base.base.dev; | |
330 | struct drm_i915_private *dev_priv = dev->dev_private; | |
331 | ||
332 | return (I915_READ(PCH_PP_CONTROL) & EDP_FORCE_VDD) != 0; | |
333 | } | |
334 | ||
9b984dae KP |
335 | static void |
336 | intel_dp_check_edp(struct intel_dp *intel_dp) | |
337 | { | |
338 | struct drm_device *dev = intel_dp->base.base.dev; | |
339 | struct drm_i915_private *dev_priv = dev->dev_private; | |
ebf33b18 | 340 | |
9b984dae KP |
341 | if (!is_edp(intel_dp)) |
342 | return; | |
ebf33b18 | 343 | if (!ironlake_edp_have_panel_power(intel_dp) && !ironlake_edp_have_panel_vdd(intel_dp)) { |
9b984dae KP |
344 | WARN(1, "eDP powered off while attempting aux channel communication.\n"); |
345 | DRM_DEBUG_KMS("Status 0x%08x Control 0x%08x\n", | |
ebf33b18 | 346 | I915_READ(PCH_PP_STATUS), |
9b984dae KP |
347 | I915_READ(PCH_PP_CONTROL)); |
348 | } | |
349 | } | |
350 | ||
a4fc5ed6 | 351 | static int |
ea5b213a | 352 | intel_dp_aux_ch(struct intel_dp *intel_dp, |
a4fc5ed6 KP |
353 | uint8_t *send, int send_bytes, |
354 | uint8_t *recv, int recv_size) | |
355 | { | |
ea5b213a | 356 | uint32_t output_reg = intel_dp->output_reg; |
4ef69c7a | 357 | struct drm_device *dev = intel_dp->base.base.dev; |
a4fc5ed6 KP |
358 | struct drm_i915_private *dev_priv = dev->dev_private; |
359 | uint32_t ch_ctl = output_reg + 0x10; | |
360 | uint32_t ch_data = ch_ctl + 4; | |
361 | int i; | |
362 | int recv_bytes; | |
a4fc5ed6 | 363 | uint32_t status; |
fb0f8fbf | 364 | uint32_t aux_clock_divider; |
092945e1 | 365 | int try, precharge = 5; |
a4fc5ed6 | 366 | |
9b984dae | 367 | intel_dp_check_edp(intel_dp); |
a4fc5ed6 | 368 | /* The clock divider is based off the hrawclk, |
fb0f8fbf KP |
369 | * and would like to run at 2MHz. So, take the |
370 | * hrawclk value and divide by 2 and use that | |
6176b8f9 JB |
371 | * |
372 | * Note that PCH attached eDP panels should use a 125MHz input | |
373 | * clock divider. | |
a4fc5ed6 | 374 | */ |
1c95822a | 375 | if (is_cpu_edp(intel_dp)) { |
1a2eb460 KP |
376 | if (IS_GEN6(dev) || IS_GEN7(dev)) |
377 | aux_clock_divider = 200; /* SNB & IVB eDP input clock at 400Mhz */ | |
e3421a18 ZW |
378 | else |
379 | aux_clock_divider = 225; /* eDP input clock at 450Mhz */ | |
380 | } else if (HAS_PCH_SPLIT(dev)) | |
6919132e | 381 | aux_clock_divider = 63; /* IRL input clock fixed at 125Mhz */ |
5eb08b69 ZW |
382 | else |
383 | aux_clock_divider = intel_hrawclk(dev) / 2; | |
384 | ||
11bee43e JB |
385 | /* Try to wait for any previous AUX channel activity */ |
386 | for (try = 0; try < 3; try++) { | |
387 | status = I915_READ(ch_ctl); | |
388 | if ((status & DP_AUX_CH_CTL_SEND_BUSY) == 0) | |
389 | break; | |
390 | msleep(1); | |
391 | } | |
392 | ||
393 | if (try == 3) { | |
394 | WARN(1, "dp_aux_ch not started status 0x%08x\n", | |
395 | I915_READ(ch_ctl)); | |
4f7f7b7e CW |
396 | return -EBUSY; |
397 | } | |
398 | ||
fb0f8fbf KP |
399 | /* Must try at least 3 times according to DP spec */ |
400 | for (try = 0; try < 5; try++) { | |
401 | /* Load the send data into the aux channel data registers */ | |
4f7f7b7e CW |
402 | for (i = 0; i < send_bytes; i += 4) |
403 | I915_WRITE(ch_data + i, | |
404 | pack_aux(send + i, send_bytes - i)); | |
0206e353 | 405 | |
fb0f8fbf | 406 | /* Send the command and wait for it to complete */ |
4f7f7b7e CW |
407 | I915_WRITE(ch_ctl, |
408 | DP_AUX_CH_CTL_SEND_BUSY | | |
409 | DP_AUX_CH_CTL_TIME_OUT_400us | | |
410 | (send_bytes << DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT) | | |
411 | (precharge << DP_AUX_CH_CTL_PRECHARGE_2US_SHIFT) | | |
412 | (aux_clock_divider << DP_AUX_CH_CTL_BIT_CLOCK_2X_SHIFT) | | |
413 | DP_AUX_CH_CTL_DONE | | |
414 | DP_AUX_CH_CTL_TIME_OUT_ERROR | | |
415 | DP_AUX_CH_CTL_RECEIVE_ERROR); | |
fb0f8fbf | 416 | for (;;) { |
fb0f8fbf KP |
417 | status = I915_READ(ch_ctl); |
418 | if ((status & DP_AUX_CH_CTL_SEND_BUSY) == 0) | |
419 | break; | |
4f7f7b7e | 420 | udelay(100); |
fb0f8fbf | 421 | } |
0206e353 | 422 | |
fb0f8fbf | 423 | /* Clear done status and any errors */ |
4f7f7b7e CW |
424 | I915_WRITE(ch_ctl, |
425 | status | | |
426 | DP_AUX_CH_CTL_DONE | | |
427 | DP_AUX_CH_CTL_TIME_OUT_ERROR | | |
428 | DP_AUX_CH_CTL_RECEIVE_ERROR); | |
429 | if (status & DP_AUX_CH_CTL_DONE) | |
a4fc5ed6 KP |
430 | break; |
431 | } | |
432 | ||
a4fc5ed6 | 433 | if ((status & DP_AUX_CH_CTL_DONE) == 0) { |
1ae8c0a5 | 434 | DRM_ERROR("dp_aux_ch not done status 0x%08x\n", status); |
a5b3da54 | 435 | return -EBUSY; |
a4fc5ed6 KP |
436 | } |
437 | ||
438 | /* Check for timeout or receive error. | |
439 | * Timeouts occur when the sink is not connected | |
440 | */ | |
a5b3da54 | 441 | if (status & DP_AUX_CH_CTL_RECEIVE_ERROR) { |
1ae8c0a5 | 442 | DRM_ERROR("dp_aux_ch receive error status 0x%08x\n", status); |
a5b3da54 KP |
443 | return -EIO; |
444 | } | |
1ae8c0a5 KP |
445 | |
446 | /* Timeouts occur when the device isn't connected, so they're | |
447 | * "normal" -- don't fill the kernel log with these */ | |
a5b3da54 | 448 | if (status & DP_AUX_CH_CTL_TIME_OUT_ERROR) { |
28c97730 | 449 | DRM_DEBUG_KMS("dp_aux_ch timeout status 0x%08x\n", status); |
a5b3da54 | 450 | return -ETIMEDOUT; |
a4fc5ed6 KP |
451 | } |
452 | ||
453 | /* Unload any bytes sent back from the other side */ | |
454 | recv_bytes = ((status & DP_AUX_CH_CTL_MESSAGE_SIZE_MASK) >> | |
455 | DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT); | |
a4fc5ed6 KP |
456 | if (recv_bytes > recv_size) |
457 | recv_bytes = recv_size; | |
0206e353 | 458 | |
4f7f7b7e CW |
459 | for (i = 0; i < recv_bytes; i += 4) |
460 | unpack_aux(I915_READ(ch_data + i), | |
461 | recv + i, recv_bytes - i); | |
a4fc5ed6 KP |
462 | |
463 | return recv_bytes; | |
464 | } | |
465 | ||
466 | /* Write data to the aux channel in native mode */ | |
467 | static int | |
ea5b213a | 468 | intel_dp_aux_native_write(struct intel_dp *intel_dp, |
a4fc5ed6 KP |
469 | uint16_t address, uint8_t *send, int send_bytes) |
470 | { | |
471 | int ret; | |
472 | uint8_t msg[20]; | |
473 | int msg_bytes; | |
474 | uint8_t ack; | |
475 | ||
9b984dae | 476 | intel_dp_check_edp(intel_dp); |
a4fc5ed6 KP |
477 | if (send_bytes > 16) |
478 | return -1; | |
479 | msg[0] = AUX_NATIVE_WRITE << 4; | |
480 | msg[1] = address >> 8; | |
eebc863e | 481 | msg[2] = address & 0xff; |
a4fc5ed6 KP |
482 | msg[3] = send_bytes - 1; |
483 | memcpy(&msg[4], send, send_bytes); | |
484 | msg_bytes = send_bytes + 4; | |
485 | for (;;) { | |
ea5b213a | 486 | ret = intel_dp_aux_ch(intel_dp, msg, msg_bytes, &ack, 1); |
a4fc5ed6 KP |
487 | if (ret < 0) |
488 | return ret; | |
489 | if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_ACK) | |
490 | break; | |
491 | else if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_DEFER) | |
492 | udelay(100); | |
493 | else | |
a5b3da54 | 494 | return -EIO; |
a4fc5ed6 KP |
495 | } |
496 | return send_bytes; | |
497 | } | |
498 | ||
499 | /* Write a single byte to the aux channel in native mode */ | |
500 | static int | |
ea5b213a | 501 | intel_dp_aux_native_write_1(struct intel_dp *intel_dp, |
a4fc5ed6 KP |
502 | uint16_t address, uint8_t byte) |
503 | { | |
ea5b213a | 504 | return intel_dp_aux_native_write(intel_dp, address, &byte, 1); |
a4fc5ed6 KP |
505 | } |
506 | ||
507 | /* read bytes from a native aux channel */ | |
508 | static int | |
ea5b213a | 509 | intel_dp_aux_native_read(struct intel_dp *intel_dp, |
a4fc5ed6 KP |
510 | uint16_t address, uint8_t *recv, int recv_bytes) |
511 | { | |
512 | uint8_t msg[4]; | |
513 | int msg_bytes; | |
514 | uint8_t reply[20]; | |
515 | int reply_bytes; | |
516 | uint8_t ack; | |
517 | int ret; | |
518 | ||
9b984dae | 519 | intel_dp_check_edp(intel_dp); |
a4fc5ed6 KP |
520 | msg[0] = AUX_NATIVE_READ << 4; |
521 | msg[1] = address >> 8; | |
522 | msg[2] = address & 0xff; | |
523 | msg[3] = recv_bytes - 1; | |
524 | ||
525 | msg_bytes = 4; | |
526 | reply_bytes = recv_bytes + 1; | |
527 | ||
528 | for (;;) { | |
ea5b213a | 529 | ret = intel_dp_aux_ch(intel_dp, msg, msg_bytes, |
a4fc5ed6 | 530 | reply, reply_bytes); |
a5b3da54 KP |
531 | if (ret == 0) |
532 | return -EPROTO; | |
533 | if (ret < 0) | |
a4fc5ed6 KP |
534 | return ret; |
535 | ack = reply[0]; | |
536 | if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_ACK) { | |
537 | memcpy(recv, reply + 1, ret - 1); | |
538 | return ret - 1; | |
539 | } | |
540 | else if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_DEFER) | |
541 | udelay(100); | |
542 | else | |
a5b3da54 | 543 | return -EIO; |
a4fc5ed6 KP |
544 | } |
545 | } | |
546 | ||
547 | static int | |
ab2c0672 DA |
548 | intel_dp_i2c_aux_ch(struct i2c_adapter *adapter, int mode, |
549 | uint8_t write_byte, uint8_t *read_byte) | |
a4fc5ed6 | 550 | { |
ab2c0672 | 551 | struct i2c_algo_dp_aux_data *algo_data = adapter->algo_data; |
ea5b213a CW |
552 | struct intel_dp *intel_dp = container_of(adapter, |
553 | struct intel_dp, | |
554 | adapter); | |
ab2c0672 DA |
555 | uint16_t address = algo_data->address; |
556 | uint8_t msg[5]; | |
557 | uint8_t reply[2]; | |
8316f337 | 558 | unsigned retry; |
ab2c0672 DA |
559 | int msg_bytes; |
560 | int reply_bytes; | |
561 | int ret; | |
562 | ||
9b984dae | 563 | intel_dp_check_edp(intel_dp); |
ab2c0672 DA |
564 | /* Set up the command byte */ |
565 | if (mode & MODE_I2C_READ) | |
566 | msg[0] = AUX_I2C_READ << 4; | |
567 | else | |
568 | msg[0] = AUX_I2C_WRITE << 4; | |
569 | ||
570 | if (!(mode & MODE_I2C_STOP)) | |
571 | msg[0] |= AUX_I2C_MOT << 4; | |
a4fc5ed6 | 572 | |
ab2c0672 DA |
573 | msg[1] = address >> 8; |
574 | msg[2] = address; | |
575 | ||
576 | switch (mode) { | |
577 | case MODE_I2C_WRITE: | |
578 | msg[3] = 0; | |
579 | msg[4] = write_byte; | |
580 | msg_bytes = 5; | |
581 | reply_bytes = 1; | |
582 | break; | |
583 | case MODE_I2C_READ: | |
584 | msg[3] = 0; | |
585 | msg_bytes = 4; | |
586 | reply_bytes = 2; | |
587 | break; | |
588 | default: | |
589 | msg_bytes = 3; | |
590 | reply_bytes = 1; | |
591 | break; | |
592 | } | |
593 | ||
8316f337 DF |
594 | for (retry = 0; retry < 5; retry++) { |
595 | ret = intel_dp_aux_ch(intel_dp, | |
596 | msg, msg_bytes, | |
597 | reply, reply_bytes); | |
ab2c0672 | 598 | if (ret < 0) { |
3ff99164 | 599 | DRM_DEBUG_KMS("aux_ch failed %d\n", ret); |
ab2c0672 DA |
600 | return ret; |
601 | } | |
8316f337 DF |
602 | |
603 | switch (reply[0] & AUX_NATIVE_REPLY_MASK) { | |
604 | case AUX_NATIVE_REPLY_ACK: | |
605 | /* I2C-over-AUX Reply field is only valid | |
606 | * when paired with AUX ACK. | |
607 | */ | |
608 | break; | |
609 | case AUX_NATIVE_REPLY_NACK: | |
610 | DRM_DEBUG_KMS("aux_ch native nack\n"); | |
611 | return -EREMOTEIO; | |
612 | case AUX_NATIVE_REPLY_DEFER: | |
613 | udelay(100); | |
614 | continue; | |
615 | default: | |
616 | DRM_ERROR("aux_ch invalid native reply 0x%02x\n", | |
617 | reply[0]); | |
618 | return -EREMOTEIO; | |
619 | } | |
620 | ||
ab2c0672 DA |
621 | switch (reply[0] & AUX_I2C_REPLY_MASK) { |
622 | case AUX_I2C_REPLY_ACK: | |
623 | if (mode == MODE_I2C_READ) { | |
624 | *read_byte = reply[1]; | |
625 | } | |
626 | return reply_bytes - 1; | |
627 | case AUX_I2C_REPLY_NACK: | |
8316f337 | 628 | DRM_DEBUG_KMS("aux_i2c nack\n"); |
ab2c0672 DA |
629 | return -EREMOTEIO; |
630 | case AUX_I2C_REPLY_DEFER: | |
8316f337 | 631 | DRM_DEBUG_KMS("aux_i2c defer\n"); |
ab2c0672 DA |
632 | udelay(100); |
633 | break; | |
634 | default: | |
8316f337 | 635 | DRM_ERROR("aux_i2c invalid reply 0x%02x\n", reply[0]); |
ab2c0672 DA |
636 | return -EREMOTEIO; |
637 | } | |
638 | } | |
8316f337 DF |
639 | |
640 | DRM_ERROR("too many retries, giving up\n"); | |
641 | return -EREMOTEIO; | |
a4fc5ed6 KP |
642 | } |
643 | ||
0b5c541b | 644 | static void ironlake_edp_panel_vdd_on(struct intel_dp *intel_dp); |
bd943159 | 645 | static void ironlake_edp_panel_vdd_off(struct intel_dp *intel_dp, bool sync); |
0b5c541b | 646 | |
a4fc5ed6 | 647 | static int |
ea5b213a | 648 | intel_dp_i2c_init(struct intel_dp *intel_dp, |
55f78c43 | 649 | struct intel_connector *intel_connector, const char *name) |
a4fc5ed6 | 650 | { |
0b5c541b KP |
651 | int ret; |
652 | ||
d54e9d28 | 653 | DRM_DEBUG_KMS("i2c_init %s\n", name); |
ea5b213a CW |
654 | intel_dp->algo.running = false; |
655 | intel_dp->algo.address = 0; | |
656 | intel_dp->algo.aux_ch = intel_dp_i2c_aux_ch; | |
657 | ||
0206e353 | 658 | memset(&intel_dp->adapter, '\0', sizeof(intel_dp->adapter)); |
ea5b213a CW |
659 | intel_dp->adapter.owner = THIS_MODULE; |
660 | intel_dp->adapter.class = I2C_CLASS_DDC; | |
0206e353 | 661 | strncpy(intel_dp->adapter.name, name, sizeof(intel_dp->adapter.name) - 1); |
ea5b213a CW |
662 | intel_dp->adapter.name[sizeof(intel_dp->adapter.name) - 1] = '\0'; |
663 | intel_dp->adapter.algo_data = &intel_dp->algo; | |
664 | intel_dp->adapter.dev.parent = &intel_connector->base.kdev; | |
665 | ||
0b5c541b KP |
666 | ironlake_edp_panel_vdd_on(intel_dp); |
667 | ret = i2c_dp_aux_add_bus(&intel_dp->adapter); | |
bd943159 | 668 | ironlake_edp_panel_vdd_off(intel_dp, false); |
0b5c541b | 669 | return ret; |
a4fc5ed6 KP |
670 | } |
671 | ||
672 | static bool | |
673 | intel_dp_mode_fixup(struct drm_encoder *encoder, struct drm_display_mode *mode, | |
674 | struct drm_display_mode *adjusted_mode) | |
675 | { | |
0d3a1bee | 676 | struct drm_device *dev = encoder->dev; |
ea5b213a | 677 | struct intel_dp *intel_dp = enc_to_intel_dp(encoder); |
a4fc5ed6 | 678 | int lane_count, clock; |
ea5b213a CW |
679 | int max_lane_count = intel_dp_max_lane_count(intel_dp); |
680 | int max_clock = intel_dp_max_link_bw(intel_dp) == DP_LINK_BW_2_7 ? 1 : 0; | |
3b5c78a3 | 681 | int bpp = mode->private_flags & INTEL_MODE_DP_FORCE_6BPC ? 18 : 0; |
a4fc5ed6 KP |
682 | static int bws[2] = { DP_LINK_BW_1_62, DP_LINK_BW_2_7 }; |
683 | ||
d15456de KP |
684 | if (is_edp(intel_dp) && intel_dp->panel_fixed_mode) { |
685 | intel_fixed_panel_mode(intel_dp->panel_fixed_mode, adjusted_mode); | |
1d8e1c75 CW |
686 | intel_pch_panel_fitting(dev, DRM_MODE_SCALE_FULLSCREEN, |
687 | mode, adjusted_mode); | |
0d3a1bee ZY |
688 | /* |
689 | * the mode->clock is used to calculate the Data&Link M/N | |
690 | * of the pipe. For the eDP the fixed clock should be used. | |
691 | */ | |
d15456de | 692 | mode->clock = intel_dp->panel_fixed_mode->clock; |
0d3a1bee ZY |
693 | } |
694 | ||
a4fc5ed6 KP |
695 | for (lane_count = 1; lane_count <= max_lane_count; lane_count <<= 1) { |
696 | for (clock = 0; clock <= max_clock; clock++) { | |
fe27d53e | 697 | int link_avail = intel_dp_max_data_rate(intel_dp_link_clock(bws[clock]), lane_count); |
a4fc5ed6 | 698 | |
3b5c78a3 | 699 | if (intel_dp_link_required(intel_dp, mode->clock, bpp) |
885a5fb5 | 700 | <= link_avail) { |
ea5b213a CW |
701 | intel_dp->link_bw = bws[clock]; |
702 | intel_dp->lane_count = lane_count; | |
703 | adjusted_mode->clock = intel_dp_link_clock(intel_dp->link_bw); | |
28c97730 ZY |
704 | DRM_DEBUG_KMS("Display port link bw %02x lane " |
705 | "count %d clock %d\n", | |
ea5b213a | 706 | intel_dp->link_bw, intel_dp->lane_count, |
a4fc5ed6 KP |
707 | adjusted_mode->clock); |
708 | return true; | |
709 | } | |
710 | } | |
711 | } | |
fe27d53e | 712 | |
a4fc5ed6 KP |
713 | return false; |
714 | } | |
715 | ||
716 | struct intel_dp_m_n { | |
717 | uint32_t tu; | |
718 | uint32_t gmch_m; | |
719 | uint32_t gmch_n; | |
720 | uint32_t link_m; | |
721 | uint32_t link_n; | |
722 | }; | |
723 | ||
724 | static void | |
725 | intel_reduce_ratio(uint32_t *num, uint32_t *den) | |
726 | { | |
727 | while (*num > 0xffffff || *den > 0xffffff) { | |
728 | *num >>= 1; | |
729 | *den >>= 1; | |
730 | } | |
731 | } | |
732 | ||
733 | static void | |
36e83a18 | 734 | intel_dp_compute_m_n(int bpp, |
a4fc5ed6 KP |
735 | int nlanes, |
736 | int pixel_clock, | |
737 | int link_clock, | |
738 | struct intel_dp_m_n *m_n) | |
739 | { | |
740 | m_n->tu = 64; | |
36e83a18 | 741 | m_n->gmch_m = (pixel_clock * bpp) >> 3; |
a4fc5ed6 KP |
742 | m_n->gmch_n = link_clock * nlanes; |
743 | intel_reduce_ratio(&m_n->gmch_m, &m_n->gmch_n); | |
744 | m_n->link_m = pixel_clock; | |
745 | m_n->link_n = link_clock; | |
746 | intel_reduce_ratio(&m_n->link_m, &m_n->link_n); | |
747 | } | |
748 | ||
749 | void | |
750 | intel_dp_set_m_n(struct drm_crtc *crtc, struct drm_display_mode *mode, | |
751 | struct drm_display_mode *adjusted_mode) | |
752 | { | |
753 | struct drm_device *dev = crtc->dev; | |
754 | struct drm_mode_config *mode_config = &dev->mode_config; | |
55f78c43 | 755 | struct drm_encoder *encoder; |
a4fc5ed6 KP |
756 | struct drm_i915_private *dev_priv = dev->dev_private; |
757 | struct intel_crtc *intel_crtc = to_intel_crtc(crtc); | |
858fa035 | 758 | int lane_count = 4; |
a4fc5ed6 | 759 | struct intel_dp_m_n m_n; |
9db4a9c7 | 760 | int pipe = intel_crtc->pipe; |
a4fc5ed6 KP |
761 | |
762 | /* | |
21d40d37 | 763 | * Find the lane count in the intel_encoder private |
a4fc5ed6 | 764 | */ |
55f78c43 | 765 | list_for_each_entry(encoder, &mode_config->encoder_list, head) { |
ea5b213a | 766 | struct intel_dp *intel_dp; |
a4fc5ed6 | 767 | |
d8201ab6 | 768 | if (encoder->crtc != crtc) |
a4fc5ed6 KP |
769 | continue; |
770 | ||
ea5b213a | 771 | intel_dp = enc_to_intel_dp(encoder); |
9a10f401 KP |
772 | if (intel_dp->base.type == INTEL_OUTPUT_DISPLAYPORT || |
773 | intel_dp->base.type == INTEL_OUTPUT_EDP) | |
774 | { | |
ea5b213a | 775 | lane_count = intel_dp->lane_count; |
51190667 | 776 | break; |
a4fc5ed6 KP |
777 | } |
778 | } | |
779 | ||
780 | /* | |
781 | * Compute the GMCH and Link ratios. The '3' here is | |
782 | * the number of bytes_per_pixel post-LUT, which we always | |
783 | * set up for 8-bits of R/G/B, or 3 bytes total. | |
784 | */ | |
858fa035 | 785 | intel_dp_compute_m_n(intel_crtc->bpp, lane_count, |
a4fc5ed6 KP |
786 | mode->clock, adjusted_mode->clock, &m_n); |
787 | ||
c619eed4 | 788 | if (HAS_PCH_SPLIT(dev)) { |
9db4a9c7 JB |
789 | I915_WRITE(TRANSDATA_M1(pipe), |
790 | ((m_n.tu - 1) << PIPE_GMCH_DATA_M_TU_SIZE_SHIFT) | | |
791 | m_n.gmch_m); | |
792 | I915_WRITE(TRANSDATA_N1(pipe), m_n.gmch_n); | |
793 | I915_WRITE(TRANSDPLINK_M1(pipe), m_n.link_m); | |
794 | I915_WRITE(TRANSDPLINK_N1(pipe), m_n.link_n); | |
a4fc5ed6 | 795 | } else { |
9db4a9c7 JB |
796 | I915_WRITE(PIPE_GMCH_DATA_M(pipe), |
797 | ((m_n.tu - 1) << PIPE_GMCH_DATA_M_TU_SIZE_SHIFT) | | |
798 | m_n.gmch_m); | |
799 | I915_WRITE(PIPE_GMCH_DATA_N(pipe), m_n.gmch_n); | |
800 | I915_WRITE(PIPE_DP_LINK_M(pipe), m_n.link_m); | |
801 | I915_WRITE(PIPE_DP_LINK_N(pipe), m_n.link_n); | |
a4fc5ed6 KP |
802 | } |
803 | } | |
804 | ||
f01eca2e KP |
805 | static void ironlake_edp_pll_on(struct drm_encoder *encoder); |
806 | static void ironlake_edp_pll_off(struct drm_encoder *encoder); | |
807 | ||
a4fc5ed6 KP |
808 | static void |
809 | intel_dp_mode_set(struct drm_encoder *encoder, struct drm_display_mode *mode, | |
810 | struct drm_display_mode *adjusted_mode) | |
811 | { | |
e3421a18 | 812 | struct drm_device *dev = encoder->dev; |
417e822d | 813 | struct drm_i915_private *dev_priv = dev->dev_private; |
ea5b213a | 814 | struct intel_dp *intel_dp = enc_to_intel_dp(encoder); |
4ef69c7a | 815 | struct drm_crtc *crtc = intel_dp->base.base.crtc; |
a4fc5ed6 KP |
816 | struct intel_crtc *intel_crtc = to_intel_crtc(crtc); |
817 | ||
f01eca2e KP |
818 | /* Turn on the eDP PLL if needed */ |
819 | if (is_edp(intel_dp)) { | |
820 | if (!is_pch_edp(intel_dp)) | |
821 | ironlake_edp_pll_on(encoder); | |
822 | else | |
823 | ironlake_edp_pll_off(encoder); | |
824 | } | |
825 | ||
417e822d | 826 | /* |
1a2eb460 | 827 | * There are four kinds of DP registers: |
417e822d KP |
828 | * |
829 | * IBX PCH | |
1a2eb460 KP |
830 | * SNB CPU |
831 | * IVB CPU | |
417e822d KP |
832 | * CPT PCH |
833 | * | |
834 | * IBX PCH and CPU are the same for almost everything, | |
835 | * except that the CPU DP PLL is configured in this | |
836 | * register | |
837 | * | |
838 | * CPT PCH is quite different, having many bits moved | |
839 | * to the TRANS_DP_CTL register instead. That | |
840 | * configuration happens (oddly) in ironlake_pch_enable | |
841 | */ | |
9c9e7927 | 842 | |
417e822d KP |
843 | /* Preserve the BIOS-computed detected bit. This is |
844 | * supposed to be read-only. | |
845 | */ | |
846 | intel_dp->DP = I915_READ(intel_dp->output_reg) & DP_DETECTED; | |
847 | intel_dp->DP |= DP_VOLTAGE_0_4 | DP_PRE_EMPHASIS_0; | |
a4fc5ed6 | 848 | |
417e822d KP |
849 | /* Handle DP bits in common between all three register formats */ |
850 | ||
851 | intel_dp->DP |= DP_VOLTAGE_0_4 | DP_PRE_EMPHASIS_0; | |
a4fc5ed6 | 852 | |
ea5b213a | 853 | switch (intel_dp->lane_count) { |
a4fc5ed6 | 854 | case 1: |
ea5b213a | 855 | intel_dp->DP |= DP_PORT_WIDTH_1; |
a4fc5ed6 KP |
856 | break; |
857 | case 2: | |
ea5b213a | 858 | intel_dp->DP |= DP_PORT_WIDTH_2; |
a4fc5ed6 KP |
859 | break; |
860 | case 4: | |
ea5b213a | 861 | intel_dp->DP |= DP_PORT_WIDTH_4; |
a4fc5ed6 KP |
862 | break; |
863 | } | |
e0dac65e WF |
864 | if (intel_dp->has_audio) { |
865 | DRM_DEBUG_DRIVER("Enabling DP audio on pipe %c\n", | |
866 | pipe_name(intel_crtc->pipe)); | |
ea5b213a | 867 | intel_dp->DP |= DP_AUDIO_OUTPUT_ENABLE; |
e0dac65e WF |
868 | intel_write_eld(encoder, adjusted_mode); |
869 | } | |
ea5b213a CW |
870 | memset(intel_dp->link_configuration, 0, DP_LINK_CONFIGURATION_SIZE); |
871 | intel_dp->link_configuration[0] = intel_dp->link_bw; | |
872 | intel_dp->link_configuration[1] = intel_dp->lane_count; | |
a2cab1b2 | 873 | intel_dp->link_configuration[8] = DP_SET_ANSI_8B10B; |
a4fc5ed6 | 874 | /* |
9962c925 | 875 | * Check for DPCD version > 1.1 and enhanced framing support |
a4fc5ed6 | 876 | */ |
7183dc29 JB |
877 | if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11 && |
878 | (intel_dp->dpcd[DP_MAX_LANE_COUNT] & DP_ENHANCED_FRAME_CAP)) { | |
ea5b213a | 879 | intel_dp->link_configuration[1] |= DP_LANE_COUNT_ENHANCED_FRAME_EN; |
a4fc5ed6 KP |
880 | } |
881 | ||
417e822d | 882 | /* Split out the IBX/CPU vs CPT settings */ |
32f9d658 | 883 | |
1a2eb460 KP |
884 | if (is_cpu_edp(intel_dp) && IS_GEN7(dev)) { |
885 | if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC) | |
886 | intel_dp->DP |= DP_SYNC_HS_HIGH; | |
887 | if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC) | |
888 | intel_dp->DP |= DP_SYNC_VS_HIGH; | |
889 | intel_dp->DP |= DP_LINK_TRAIN_OFF_CPT; | |
890 | ||
891 | if (intel_dp->link_configuration[1] & DP_LANE_COUNT_ENHANCED_FRAME_EN) | |
892 | intel_dp->DP |= DP_ENHANCED_FRAMING; | |
893 | ||
894 | intel_dp->DP |= intel_crtc->pipe << 29; | |
895 | ||
896 | /* don't miss out required setting for eDP */ | |
897 | intel_dp->DP |= DP_PLL_ENABLE; | |
898 | if (adjusted_mode->clock < 200000) | |
899 | intel_dp->DP |= DP_PLL_FREQ_160MHZ; | |
900 | else | |
901 | intel_dp->DP |= DP_PLL_FREQ_270MHZ; | |
902 | } else if (!HAS_PCH_CPT(dev) || is_cpu_edp(intel_dp)) { | |
417e822d KP |
903 | intel_dp->DP |= intel_dp->color_range; |
904 | ||
905 | if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC) | |
906 | intel_dp->DP |= DP_SYNC_HS_HIGH; | |
907 | if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC) | |
908 | intel_dp->DP |= DP_SYNC_VS_HIGH; | |
909 | intel_dp->DP |= DP_LINK_TRAIN_OFF; | |
910 | ||
911 | if (intel_dp->link_configuration[1] & DP_LANE_COUNT_ENHANCED_FRAME_EN) | |
912 | intel_dp->DP |= DP_ENHANCED_FRAMING; | |
913 | ||
914 | if (intel_crtc->pipe == 1) | |
915 | intel_dp->DP |= DP_PIPEB_SELECT; | |
916 | ||
917 | if (is_cpu_edp(intel_dp)) { | |
918 | /* don't miss out required setting for eDP */ | |
919 | intel_dp->DP |= DP_PLL_ENABLE; | |
920 | if (adjusted_mode->clock < 200000) | |
921 | intel_dp->DP |= DP_PLL_FREQ_160MHZ; | |
922 | else | |
923 | intel_dp->DP |= DP_PLL_FREQ_270MHZ; | |
924 | } | |
925 | } else { | |
926 | intel_dp->DP |= DP_LINK_TRAIN_OFF_CPT; | |
32f9d658 | 927 | } |
a4fc5ed6 KP |
928 | } |
929 | ||
99ea7127 KP |
930 | #define IDLE_ON_MASK (PP_ON | 0 | PP_SEQUENCE_MASK | 0 | PP_SEQUENCE_STATE_MASK) |
931 | #define IDLE_ON_VALUE (PP_ON | 0 | PP_SEQUENCE_NONE | 0 | PP_SEQUENCE_STATE_ON_IDLE) | |
932 | ||
933 | #define IDLE_OFF_MASK (PP_ON | 0 | PP_SEQUENCE_MASK | 0 | PP_SEQUENCE_STATE_MASK) | |
934 | #define IDLE_OFF_VALUE (0 | 0 | PP_SEQUENCE_NONE | 0 | PP_SEQUENCE_STATE_OFF_IDLE) | |
935 | ||
936 | #define IDLE_CYCLE_MASK (PP_ON | 0 | PP_SEQUENCE_MASK | PP_CYCLE_DELAY_ACTIVE | PP_SEQUENCE_STATE_MASK) | |
937 | #define IDLE_CYCLE_VALUE (0 | 0 | PP_SEQUENCE_NONE | 0 | PP_SEQUENCE_STATE_OFF_IDLE) | |
938 | ||
939 | static void ironlake_wait_panel_status(struct intel_dp *intel_dp, | |
940 | u32 mask, | |
941 | u32 value) | |
bd943159 | 942 | { |
99ea7127 KP |
943 | struct drm_device *dev = intel_dp->base.base.dev; |
944 | struct drm_i915_private *dev_priv = dev->dev_private; | |
32ce697c | 945 | |
99ea7127 KP |
946 | DRM_DEBUG_KMS("mask %08x value %08x status %08x control %08x\n", |
947 | mask, value, | |
948 | I915_READ(PCH_PP_STATUS), | |
949 | I915_READ(PCH_PP_CONTROL)); | |
32ce697c | 950 | |
99ea7127 KP |
951 | if (_wait_for((I915_READ(PCH_PP_STATUS) & mask) == value, 5000, 10)) { |
952 | DRM_ERROR("Panel status timeout: status %08x control %08x\n", | |
953 | I915_READ(PCH_PP_STATUS), | |
954 | I915_READ(PCH_PP_CONTROL)); | |
32ce697c | 955 | } |
99ea7127 | 956 | } |
32ce697c | 957 | |
99ea7127 KP |
958 | static void ironlake_wait_panel_on(struct intel_dp *intel_dp) |
959 | { | |
960 | DRM_DEBUG_KMS("Wait for panel power on\n"); | |
961 | ironlake_wait_panel_status(intel_dp, IDLE_ON_MASK, IDLE_ON_VALUE); | |
bd943159 KP |
962 | } |
963 | ||
99ea7127 KP |
964 | static void ironlake_wait_panel_off(struct intel_dp *intel_dp) |
965 | { | |
966 | DRM_DEBUG_KMS("Wait for panel power off time\n"); | |
967 | ironlake_wait_panel_status(intel_dp, IDLE_OFF_MASK, IDLE_OFF_VALUE); | |
968 | } | |
969 | ||
970 | static void ironlake_wait_panel_power_cycle(struct intel_dp *intel_dp) | |
971 | { | |
972 | DRM_DEBUG_KMS("Wait for panel power cycle\n"); | |
973 | ironlake_wait_panel_status(intel_dp, IDLE_CYCLE_MASK, IDLE_CYCLE_VALUE); | |
974 | } | |
975 | ||
976 | ||
832dd3c1 KP |
977 | /* Read the current pp_control value, unlocking the register if it |
978 | * is locked | |
979 | */ | |
980 | ||
981 | static u32 ironlake_get_pp_control(struct drm_i915_private *dev_priv) | |
982 | { | |
983 | u32 control = I915_READ(PCH_PP_CONTROL); | |
984 | ||
985 | control &= ~PANEL_UNLOCK_MASK; | |
986 | control |= PANEL_UNLOCK_REGS; | |
987 | return control; | |
bd943159 KP |
988 | } |
989 | ||
5d613501 JB |
990 | static void ironlake_edp_panel_vdd_on(struct intel_dp *intel_dp) |
991 | { | |
992 | struct drm_device *dev = intel_dp->base.base.dev; | |
993 | struct drm_i915_private *dev_priv = dev->dev_private; | |
994 | u32 pp; | |
995 | ||
97af61f5 KP |
996 | if (!is_edp(intel_dp)) |
997 | return; | |
f01eca2e | 998 | DRM_DEBUG_KMS("Turn eDP VDD on\n"); |
5d613501 | 999 | |
bd943159 KP |
1000 | WARN(intel_dp->want_panel_vdd, |
1001 | "eDP VDD already requested on\n"); | |
1002 | ||
1003 | intel_dp->want_panel_vdd = true; | |
99ea7127 | 1004 | |
bd943159 KP |
1005 | if (ironlake_edp_have_panel_vdd(intel_dp)) { |
1006 | DRM_DEBUG_KMS("eDP VDD already on\n"); | |
1007 | return; | |
1008 | } | |
1009 | ||
99ea7127 KP |
1010 | if (!ironlake_edp_have_panel_power(intel_dp)) |
1011 | ironlake_wait_panel_power_cycle(intel_dp); | |
1012 | ||
832dd3c1 | 1013 | pp = ironlake_get_pp_control(dev_priv); |
5d613501 JB |
1014 | pp |= EDP_FORCE_VDD; |
1015 | I915_WRITE(PCH_PP_CONTROL, pp); | |
1016 | POSTING_READ(PCH_PP_CONTROL); | |
f01eca2e KP |
1017 | DRM_DEBUG_KMS("PCH_PP_STATUS: 0x%08x PCH_PP_CONTROL: 0x%08x\n", |
1018 | I915_READ(PCH_PP_STATUS), I915_READ(PCH_PP_CONTROL)); | |
ebf33b18 KP |
1019 | |
1020 | /* | |
1021 | * If the panel wasn't on, delay before accessing aux channel | |
1022 | */ | |
1023 | if (!ironlake_edp_have_panel_power(intel_dp)) { | |
bd943159 | 1024 | DRM_DEBUG_KMS("eDP was not running\n"); |
f01eca2e | 1025 | msleep(intel_dp->panel_power_up_delay); |
f01eca2e | 1026 | } |
5d613501 JB |
1027 | } |
1028 | ||
bd943159 | 1029 | static void ironlake_panel_vdd_off_sync(struct intel_dp *intel_dp) |
5d613501 JB |
1030 | { |
1031 | struct drm_device *dev = intel_dp->base.base.dev; | |
1032 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1033 | u32 pp; | |
1034 | ||
bd943159 | 1035 | if (!intel_dp->want_panel_vdd && ironlake_edp_have_panel_vdd(intel_dp)) { |
832dd3c1 | 1036 | pp = ironlake_get_pp_control(dev_priv); |
bd943159 KP |
1037 | pp &= ~EDP_FORCE_VDD; |
1038 | I915_WRITE(PCH_PP_CONTROL, pp); | |
1039 | POSTING_READ(PCH_PP_CONTROL); | |
1040 | ||
1041 | /* Make sure sequencer is idle before allowing subsequent activity */ | |
1042 | DRM_DEBUG_KMS("PCH_PP_STATUS: 0x%08x PCH_PP_CONTROL: 0x%08x\n", | |
1043 | I915_READ(PCH_PP_STATUS), I915_READ(PCH_PP_CONTROL)); | |
99ea7127 KP |
1044 | |
1045 | msleep(intel_dp->panel_power_down_delay); | |
bd943159 KP |
1046 | } |
1047 | } | |
5d613501 | 1048 | |
bd943159 KP |
1049 | static void ironlake_panel_vdd_work(struct work_struct *__work) |
1050 | { | |
1051 | struct intel_dp *intel_dp = container_of(to_delayed_work(__work), | |
1052 | struct intel_dp, panel_vdd_work); | |
1053 | struct drm_device *dev = intel_dp->base.base.dev; | |
1054 | ||
627f7675 | 1055 | mutex_lock(&dev->mode_config.mutex); |
bd943159 | 1056 | ironlake_panel_vdd_off_sync(intel_dp); |
627f7675 | 1057 | mutex_unlock(&dev->mode_config.mutex); |
bd943159 KP |
1058 | } |
1059 | ||
1060 | static void ironlake_edp_panel_vdd_off(struct intel_dp *intel_dp, bool sync) | |
1061 | { | |
97af61f5 KP |
1062 | if (!is_edp(intel_dp)) |
1063 | return; | |
5d613501 | 1064 | |
bd943159 KP |
1065 | DRM_DEBUG_KMS("Turn eDP VDD off %d\n", intel_dp->want_panel_vdd); |
1066 | WARN(!intel_dp->want_panel_vdd, "eDP VDD not forced on"); | |
f2e8b18a | 1067 | |
bd943159 KP |
1068 | intel_dp->want_panel_vdd = false; |
1069 | ||
1070 | if (sync) { | |
1071 | ironlake_panel_vdd_off_sync(intel_dp); | |
1072 | } else { | |
1073 | /* | |
1074 | * Queue the timer to fire a long | |
1075 | * time from now (relative to the power down delay) | |
1076 | * to keep the panel power up across a sequence of operations | |
1077 | */ | |
1078 | schedule_delayed_work(&intel_dp->panel_vdd_work, | |
1079 | msecs_to_jiffies(intel_dp->panel_power_cycle_delay * 5)); | |
1080 | } | |
5d613501 JB |
1081 | } |
1082 | ||
86a3073e | 1083 | static void ironlake_edp_panel_on(struct intel_dp *intel_dp) |
9934c132 | 1084 | { |
01cb9ea6 | 1085 | struct drm_device *dev = intel_dp->base.base.dev; |
9934c132 | 1086 | struct drm_i915_private *dev_priv = dev->dev_private; |
99ea7127 | 1087 | u32 pp; |
9934c132 | 1088 | |
97af61f5 | 1089 | if (!is_edp(intel_dp)) |
bd943159 | 1090 | return; |
99ea7127 KP |
1091 | |
1092 | DRM_DEBUG_KMS("Turn eDP power on\n"); | |
1093 | ||
1094 | if (ironlake_edp_have_panel_power(intel_dp)) { | |
1095 | DRM_DEBUG_KMS("eDP power already on\n"); | |
7d639f35 | 1096 | return; |
99ea7127 | 1097 | } |
9934c132 | 1098 | |
99ea7127 | 1099 | ironlake_wait_panel_power_cycle(intel_dp); |
37c6c9b0 | 1100 | |
99ea7127 | 1101 | pp = ironlake_get_pp_control(dev_priv); |
05ce1a49 KP |
1102 | if (IS_GEN5(dev)) { |
1103 | /* ILK workaround: disable reset around power sequence */ | |
1104 | pp &= ~PANEL_POWER_RESET; | |
1105 | I915_WRITE(PCH_PP_CONTROL, pp); | |
1106 | POSTING_READ(PCH_PP_CONTROL); | |
1107 | } | |
37c6c9b0 | 1108 | |
1c0ae80a | 1109 | pp |= POWER_TARGET_ON; |
99ea7127 KP |
1110 | if (!IS_GEN5(dev)) |
1111 | pp |= PANEL_POWER_RESET; | |
1112 | ||
9934c132 | 1113 | I915_WRITE(PCH_PP_CONTROL, pp); |
01cb9ea6 | 1114 | POSTING_READ(PCH_PP_CONTROL); |
9934c132 | 1115 | |
99ea7127 | 1116 | ironlake_wait_panel_on(intel_dp); |
9934c132 | 1117 | |
05ce1a49 KP |
1118 | if (IS_GEN5(dev)) { |
1119 | pp |= PANEL_POWER_RESET; /* restore panel reset bit */ | |
1120 | I915_WRITE(PCH_PP_CONTROL, pp); | |
1121 | POSTING_READ(PCH_PP_CONTROL); | |
1122 | } | |
9934c132 JB |
1123 | } |
1124 | ||
99ea7127 | 1125 | static void ironlake_edp_panel_off(struct intel_dp *intel_dp) |
9934c132 | 1126 | { |
99ea7127 | 1127 | struct drm_device *dev = intel_dp->base.base.dev; |
9934c132 | 1128 | struct drm_i915_private *dev_priv = dev->dev_private; |
99ea7127 | 1129 | u32 pp; |
9934c132 | 1130 | |
97af61f5 KP |
1131 | if (!is_edp(intel_dp)) |
1132 | return; | |
37c6c9b0 | 1133 | |
99ea7127 | 1134 | DRM_DEBUG_KMS("Turn eDP power off\n"); |
37c6c9b0 | 1135 | |
99ea7127 | 1136 | WARN(intel_dp->want_panel_vdd, "Cannot turn power off while VDD is on\n"); |
37c6c9b0 | 1137 | |
99ea7127 KP |
1138 | pp = ironlake_get_pp_control(dev_priv); |
1139 | pp &= ~(POWER_TARGET_ON | EDP_FORCE_VDD | PANEL_POWER_RESET | EDP_BLC_ENABLE); | |
1140 | I915_WRITE(PCH_PP_CONTROL, pp); | |
1141 | POSTING_READ(PCH_PP_CONTROL); | |
9934c132 | 1142 | |
99ea7127 | 1143 | ironlake_wait_panel_off(intel_dp); |
9934c132 JB |
1144 | } |
1145 | ||
86a3073e | 1146 | static void ironlake_edp_backlight_on(struct intel_dp *intel_dp) |
32f9d658 | 1147 | { |
f01eca2e | 1148 | struct drm_device *dev = intel_dp->base.base.dev; |
32f9d658 ZW |
1149 | struct drm_i915_private *dev_priv = dev->dev_private; |
1150 | u32 pp; | |
1151 | ||
f01eca2e KP |
1152 | if (!is_edp(intel_dp)) |
1153 | return; | |
1154 | ||
28c97730 | 1155 | DRM_DEBUG_KMS("\n"); |
01cb9ea6 JB |
1156 | /* |
1157 | * If we enable the backlight right away following a panel power | |
1158 | * on, we may see slight flicker as the panel syncs with the eDP | |
1159 | * link. So delay a bit to make sure the image is solid before | |
1160 | * allowing it to appear. | |
1161 | */ | |
f01eca2e | 1162 | msleep(intel_dp->backlight_on_delay); |
832dd3c1 | 1163 | pp = ironlake_get_pp_control(dev_priv); |
32f9d658 ZW |
1164 | pp |= EDP_BLC_ENABLE; |
1165 | I915_WRITE(PCH_PP_CONTROL, pp); | |
f01eca2e | 1166 | POSTING_READ(PCH_PP_CONTROL); |
32f9d658 ZW |
1167 | } |
1168 | ||
86a3073e | 1169 | static void ironlake_edp_backlight_off(struct intel_dp *intel_dp) |
32f9d658 | 1170 | { |
f01eca2e | 1171 | struct drm_device *dev = intel_dp->base.base.dev; |
32f9d658 ZW |
1172 | struct drm_i915_private *dev_priv = dev->dev_private; |
1173 | u32 pp; | |
1174 | ||
f01eca2e KP |
1175 | if (!is_edp(intel_dp)) |
1176 | return; | |
1177 | ||
28c97730 | 1178 | DRM_DEBUG_KMS("\n"); |
832dd3c1 | 1179 | pp = ironlake_get_pp_control(dev_priv); |
32f9d658 ZW |
1180 | pp &= ~EDP_BLC_ENABLE; |
1181 | I915_WRITE(PCH_PP_CONTROL, pp); | |
f01eca2e KP |
1182 | POSTING_READ(PCH_PP_CONTROL); |
1183 | msleep(intel_dp->backlight_off_delay); | |
32f9d658 | 1184 | } |
a4fc5ed6 | 1185 | |
d240f20f JB |
1186 | static void ironlake_edp_pll_on(struct drm_encoder *encoder) |
1187 | { | |
1188 | struct drm_device *dev = encoder->dev; | |
1189 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1190 | u32 dpa_ctl; | |
1191 | ||
1192 | DRM_DEBUG_KMS("\n"); | |
1193 | dpa_ctl = I915_READ(DP_A); | |
298b0b39 | 1194 | dpa_ctl |= DP_PLL_ENABLE; |
d240f20f | 1195 | I915_WRITE(DP_A, dpa_ctl); |
298b0b39 JB |
1196 | POSTING_READ(DP_A); |
1197 | udelay(200); | |
d240f20f JB |
1198 | } |
1199 | ||
1200 | static void ironlake_edp_pll_off(struct drm_encoder *encoder) | |
1201 | { | |
1202 | struct drm_device *dev = encoder->dev; | |
1203 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1204 | u32 dpa_ctl; | |
1205 | ||
1206 | dpa_ctl = I915_READ(DP_A); | |
298b0b39 | 1207 | dpa_ctl &= ~DP_PLL_ENABLE; |
d240f20f | 1208 | I915_WRITE(DP_A, dpa_ctl); |
1af5fa1b | 1209 | POSTING_READ(DP_A); |
d240f20f JB |
1210 | udelay(200); |
1211 | } | |
1212 | ||
c7ad3810 JB |
1213 | /* If the sink supports it, try to set the power state appropriately */ |
1214 | static void intel_dp_sink_dpms(struct intel_dp *intel_dp, int mode) | |
1215 | { | |
1216 | int ret, i; | |
1217 | ||
1218 | /* Should have a valid DPCD by this point */ | |
1219 | if (intel_dp->dpcd[DP_DPCD_REV] < 0x11) | |
1220 | return; | |
1221 | ||
1222 | if (mode != DRM_MODE_DPMS_ON) { | |
1223 | ret = intel_dp_aux_native_write_1(intel_dp, DP_SET_POWER, | |
1224 | DP_SET_POWER_D3); | |
1225 | if (ret != 1) | |
1226 | DRM_DEBUG_DRIVER("failed to write sink power state\n"); | |
1227 | } else { | |
1228 | /* | |
1229 | * When turning on, we need to retry for 1ms to give the sink | |
1230 | * time to wake up. | |
1231 | */ | |
1232 | for (i = 0; i < 3; i++) { | |
1233 | ret = intel_dp_aux_native_write_1(intel_dp, | |
1234 | DP_SET_POWER, | |
1235 | DP_SET_POWER_D0); | |
1236 | if (ret == 1) | |
1237 | break; | |
1238 | msleep(1); | |
1239 | } | |
1240 | } | |
1241 | } | |
1242 | ||
d240f20f JB |
1243 | static void intel_dp_prepare(struct drm_encoder *encoder) |
1244 | { | |
1245 | struct intel_dp *intel_dp = enc_to_intel_dp(encoder); | |
d240f20f | 1246 | |
21264c63 KP |
1247 | ironlake_edp_backlight_off(intel_dp); |
1248 | ironlake_edp_panel_off(intel_dp); | |
1249 | ||
c7ad3810 | 1250 | /* Wake up the sink first */ |
f58ff854 | 1251 | ironlake_edp_panel_vdd_on(intel_dp); |
c7ad3810 | 1252 | intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON); |
21264c63 | 1253 | intel_dp_link_down(intel_dp); |
bd943159 | 1254 | ironlake_edp_panel_vdd_off(intel_dp, false); |
c7ad3810 | 1255 | |
f01eca2e KP |
1256 | /* Make sure the panel is off before trying to |
1257 | * change the mode | |
1258 | */ | |
d240f20f JB |
1259 | } |
1260 | ||
1261 | static void intel_dp_commit(struct drm_encoder *encoder) | |
1262 | { | |
1263 | struct intel_dp *intel_dp = enc_to_intel_dp(encoder); | |
d4270e57 JB |
1264 | struct drm_device *dev = encoder->dev; |
1265 | struct intel_crtc *intel_crtc = to_intel_crtc(intel_dp->base.base.crtc); | |
5d613501 | 1266 | |
97af61f5 | 1267 | ironlake_edp_panel_vdd_on(intel_dp); |
f01eca2e | 1268 | intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON); |
33a34e4e | 1269 | intel_dp_start_link_train(intel_dp); |
97af61f5 | 1270 | ironlake_edp_panel_on(intel_dp); |
bd943159 | 1271 | ironlake_edp_panel_vdd_off(intel_dp, true); |
33a34e4e | 1272 | intel_dp_complete_link_train(intel_dp); |
f01eca2e | 1273 | ironlake_edp_backlight_on(intel_dp); |
d2b996ac KP |
1274 | |
1275 | intel_dp->dpms_mode = DRM_MODE_DPMS_ON; | |
d4270e57 JB |
1276 | |
1277 | if (HAS_PCH_CPT(dev)) | |
1278 | intel_cpt_verify_modeset(dev, intel_crtc->pipe); | |
d240f20f JB |
1279 | } |
1280 | ||
a4fc5ed6 KP |
1281 | static void |
1282 | intel_dp_dpms(struct drm_encoder *encoder, int mode) | |
1283 | { | |
ea5b213a | 1284 | struct intel_dp *intel_dp = enc_to_intel_dp(encoder); |
55f78c43 | 1285 | struct drm_device *dev = encoder->dev; |
a4fc5ed6 | 1286 | struct drm_i915_private *dev_priv = dev->dev_private; |
ea5b213a | 1287 | uint32_t dp_reg = I915_READ(intel_dp->output_reg); |
a4fc5ed6 KP |
1288 | |
1289 | if (mode != DRM_MODE_DPMS_ON) { | |
21264c63 KP |
1290 | ironlake_edp_backlight_off(intel_dp); |
1291 | ironlake_edp_panel_off(intel_dp); | |
1292 | ||
245e2708 | 1293 | ironlake_edp_panel_vdd_on(intel_dp); |
c7ad3810 | 1294 | intel_dp_sink_dpms(intel_dp, mode); |
736085bc | 1295 | intel_dp_link_down(intel_dp); |
bd943159 | 1296 | ironlake_edp_panel_vdd_off(intel_dp, false); |
21264c63 KP |
1297 | |
1298 | if (is_cpu_edp(intel_dp)) | |
1299 | ironlake_edp_pll_off(encoder); | |
a4fc5ed6 | 1300 | } else { |
21264c63 KP |
1301 | if (is_cpu_edp(intel_dp)) |
1302 | ironlake_edp_pll_on(encoder); | |
1303 | ||
97af61f5 | 1304 | ironlake_edp_panel_vdd_on(intel_dp); |
c7ad3810 | 1305 | intel_dp_sink_dpms(intel_dp, mode); |
32f9d658 | 1306 | if (!(dp_reg & DP_PORT_EN)) { |
01cb9ea6 | 1307 | intel_dp_start_link_train(intel_dp); |
97af61f5 | 1308 | ironlake_edp_panel_on(intel_dp); |
bd943159 | 1309 | ironlake_edp_panel_vdd_off(intel_dp, true); |
33a34e4e | 1310 | intel_dp_complete_link_train(intel_dp); |
bee7eb2d | 1311 | } else |
bd943159 KP |
1312 | ironlake_edp_panel_vdd_off(intel_dp, false); |
1313 | ironlake_edp_backlight_on(intel_dp); | |
a4fc5ed6 | 1314 | } |
d2b996ac | 1315 | intel_dp->dpms_mode = mode; |
a4fc5ed6 KP |
1316 | } |
1317 | ||
1318 | /* | |
df0c237d JB |
1319 | * Native read with retry for link status and receiver capability reads for |
1320 | * cases where the sink may still be asleep. | |
a4fc5ed6 KP |
1321 | */ |
1322 | static bool | |
df0c237d JB |
1323 | intel_dp_aux_native_read_retry(struct intel_dp *intel_dp, uint16_t address, |
1324 | uint8_t *recv, int recv_bytes) | |
a4fc5ed6 | 1325 | { |
61da5fab JB |
1326 | int ret, i; |
1327 | ||
df0c237d JB |
1328 | /* |
1329 | * Sinks are *supposed* to come up within 1ms from an off state, | |
1330 | * but we're also supposed to retry 3 times per the spec. | |
1331 | */ | |
61da5fab | 1332 | for (i = 0; i < 3; i++) { |
df0c237d JB |
1333 | ret = intel_dp_aux_native_read(intel_dp, address, recv, |
1334 | recv_bytes); | |
1335 | if (ret == recv_bytes) | |
61da5fab JB |
1336 | return true; |
1337 | msleep(1); | |
1338 | } | |
a4fc5ed6 | 1339 | |
61da5fab | 1340 | return false; |
a4fc5ed6 KP |
1341 | } |
1342 | ||
1343 | /* | |
1344 | * Fetch AUX CH registers 0x202 - 0x207 which contain | |
1345 | * link status information | |
1346 | */ | |
1347 | static bool | |
93f62dad | 1348 | intel_dp_get_link_status(struct intel_dp *intel_dp, uint8_t link_status[DP_LINK_STATUS_SIZE]) |
a4fc5ed6 | 1349 | { |
df0c237d JB |
1350 | return intel_dp_aux_native_read_retry(intel_dp, |
1351 | DP_LANE0_1_STATUS, | |
93f62dad | 1352 | link_status, |
df0c237d | 1353 | DP_LINK_STATUS_SIZE); |
a4fc5ed6 KP |
1354 | } |
1355 | ||
1356 | static uint8_t | |
1357 | intel_dp_link_status(uint8_t link_status[DP_LINK_STATUS_SIZE], | |
1358 | int r) | |
1359 | { | |
1360 | return link_status[r - DP_LANE0_1_STATUS]; | |
1361 | } | |
1362 | ||
a4fc5ed6 | 1363 | static uint8_t |
93f62dad | 1364 | intel_get_adjust_request_voltage(uint8_t adjust_request[2], |
a4fc5ed6 KP |
1365 | int lane) |
1366 | { | |
a4fc5ed6 KP |
1367 | int s = ((lane & 1) ? |
1368 | DP_ADJUST_VOLTAGE_SWING_LANE1_SHIFT : | |
1369 | DP_ADJUST_VOLTAGE_SWING_LANE0_SHIFT); | |
93f62dad | 1370 | uint8_t l = adjust_request[lane>>1]; |
a4fc5ed6 KP |
1371 | |
1372 | return ((l >> s) & 3) << DP_TRAIN_VOLTAGE_SWING_SHIFT; | |
1373 | } | |
1374 | ||
1375 | static uint8_t | |
93f62dad | 1376 | intel_get_adjust_request_pre_emphasis(uint8_t adjust_request[2], |
a4fc5ed6 KP |
1377 | int lane) |
1378 | { | |
a4fc5ed6 KP |
1379 | int s = ((lane & 1) ? |
1380 | DP_ADJUST_PRE_EMPHASIS_LANE1_SHIFT : | |
1381 | DP_ADJUST_PRE_EMPHASIS_LANE0_SHIFT); | |
93f62dad | 1382 | uint8_t l = adjust_request[lane>>1]; |
a4fc5ed6 KP |
1383 | |
1384 | return ((l >> s) & 3) << DP_TRAIN_PRE_EMPHASIS_SHIFT; | |
1385 | } | |
1386 | ||
1387 | ||
1388 | #if 0 | |
1389 | static char *voltage_names[] = { | |
1390 | "0.4V", "0.6V", "0.8V", "1.2V" | |
1391 | }; | |
1392 | static char *pre_emph_names[] = { | |
1393 | "0dB", "3.5dB", "6dB", "9.5dB" | |
1394 | }; | |
1395 | static char *link_train_names[] = { | |
1396 | "pattern 1", "pattern 2", "idle", "off" | |
1397 | }; | |
1398 | #endif | |
1399 | ||
1400 | /* | |
1401 | * These are source-specific values; current Intel hardware supports | |
1402 | * a maximum voltage of 800mV and a maximum pre-emphasis of 6dB | |
1403 | */ | |
a4fc5ed6 KP |
1404 | |
1405 | static uint8_t | |
1a2eb460 | 1406 | intel_dp_voltage_max(struct intel_dp *intel_dp) |
a4fc5ed6 | 1407 | { |
1a2eb460 KP |
1408 | struct drm_device *dev = intel_dp->base.base.dev; |
1409 | ||
1410 | if (IS_GEN7(dev) && is_cpu_edp(intel_dp)) | |
1411 | return DP_TRAIN_VOLTAGE_SWING_800; | |
1412 | else if (HAS_PCH_CPT(dev) && !is_cpu_edp(intel_dp)) | |
1413 | return DP_TRAIN_VOLTAGE_SWING_1200; | |
1414 | else | |
1415 | return DP_TRAIN_VOLTAGE_SWING_800; | |
1416 | } | |
1417 | ||
1418 | static uint8_t | |
1419 | intel_dp_pre_emphasis_max(struct intel_dp *intel_dp, uint8_t voltage_swing) | |
1420 | { | |
1421 | struct drm_device *dev = intel_dp->base.base.dev; | |
1422 | ||
1423 | if (IS_GEN7(dev) && is_cpu_edp(intel_dp)) { | |
1424 | switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) { | |
1425 | case DP_TRAIN_VOLTAGE_SWING_400: | |
1426 | return DP_TRAIN_PRE_EMPHASIS_6; | |
1427 | case DP_TRAIN_VOLTAGE_SWING_600: | |
1428 | case DP_TRAIN_VOLTAGE_SWING_800: | |
1429 | return DP_TRAIN_PRE_EMPHASIS_3_5; | |
1430 | default: | |
1431 | return DP_TRAIN_PRE_EMPHASIS_0; | |
1432 | } | |
1433 | } else { | |
1434 | switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) { | |
1435 | case DP_TRAIN_VOLTAGE_SWING_400: | |
1436 | return DP_TRAIN_PRE_EMPHASIS_6; | |
1437 | case DP_TRAIN_VOLTAGE_SWING_600: | |
1438 | return DP_TRAIN_PRE_EMPHASIS_6; | |
1439 | case DP_TRAIN_VOLTAGE_SWING_800: | |
1440 | return DP_TRAIN_PRE_EMPHASIS_3_5; | |
1441 | case DP_TRAIN_VOLTAGE_SWING_1200: | |
1442 | default: | |
1443 | return DP_TRAIN_PRE_EMPHASIS_0; | |
1444 | } | |
a4fc5ed6 KP |
1445 | } |
1446 | } | |
1447 | ||
1448 | static void | |
93f62dad | 1449 | intel_get_adjust_train(struct intel_dp *intel_dp, uint8_t link_status[DP_LINK_STATUS_SIZE]) |
a4fc5ed6 KP |
1450 | { |
1451 | uint8_t v = 0; | |
1452 | uint8_t p = 0; | |
1453 | int lane; | |
93f62dad | 1454 | uint8_t *adjust_request = link_status + (DP_ADJUST_REQUEST_LANE0_1 - DP_LANE0_1_STATUS); |
1a2eb460 KP |
1455 | uint8_t voltage_max; |
1456 | uint8_t preemph_max; | |
a4fc5ed6 | 1457 | |
33a34e4e | 1458 | for (lane = 0; lane < intel_dp->lane_count; lane++) { |
93f62dad KP |
1459 | uint8_t this_v = intel_get_adjust_request_voltage(adjust_request, lane); |
1460 | uint8_t this_p = intel_get_adjust_request_pre_emphasis(adjust_request, lane); | |
a4fc5ed6 KP |
1461 | |
1462 | if (this_v > v) | |
1463 | v = this_v; | |
1464 | if (this_p > p) | |
1465 | p = this_p; | |
1466 | } | |
1467 | ||
1a2eb460 | 1468 | voltage_max = intel_dp_voltage_max(intel_dp); |
417e822d KP |
1469 | if (v >= voltage_max) |
1470 | v = voltage_max | DP_TRAIN_MAX_SWING_REACHED; | |
a4fc5ed6 | 1471 | |
1a2eb460 KP |
1472 | preemph_max = intel_dp_pre_emphasis_max(intel_dp, v); |
1473 | if (p >= preemph_max) | |
1474 | p = preemph_max | DP_TRAIN_MAX_PRE_EMPHASIS_REACHED; | |
a4fc5ed6 KP |
1475 | |
1476 | for (lane = 0; lane < 4; lane++) | |
33a34e4e | 1477 | intel_dp->train_set[lane] = v | p; |
a4fc5ed6 KP |
1478 | } |
1479 | ||
1480 | static uint32_t | |
93f62dad | 1481 | intel_dp_signal_levels(uint8_t train_set) |
a4fc5ed6 | 1482 | { |
3cf2efb1 | 1483 | uint32_t signal_levels = 0; |
a4fc5ed6 | 1484 | |
3cf2efb1 | 1485 | switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) { |
a4fc5ed6 KP |
1486 | case DP_TRAIN_VOLTAGE_SWING_400: |
1487 | default: | |
1488 | signal_levels |= DP_VOLTAGE_0_4; | |
1489 | break; | |
1490 | case DP_TRAIN_VOLTAGE_SWING_600: | |
1491 | signal_levels |= DP_VOLTAGE_0_6; | |
1492 | break; | |
1493 | case DP_TRAIN_VOLTAGE_SWING_800: | |
1494 | signal_levels |= DP_VOLTAGE_0_8; | |
1495 | break; | |
1496 | case DP_TRAIN_VOLTAGE_SWING_1200: | |
1497 | signal_levels |= DP_VOLTAGE_1_2; | |
1498 | break; | |
1499 | } | |
3cf2efb1 | 1500 | switch (train_set & DP_TRAIN_PRE_EMPHASIS_MASK) { |
a4fc5ed6 KP |
1501 | case DP_TRAIN_PRE_EMPHASIS_0: |
1502 | default: | |
1503 | signal_levels |= DP_PRE_EMPHASIS_0; | |
1504 | break; | |
1505 | case DP_TRAIN_PRE_EMPHASIS_3_5: | |
1506 | signal_levels |= DP_PRE_EMPHASIS_3_5; | |
1507 | break; | |
1508 | case DP_TRAIN_PRE_EMPHASIS_6: | |
1509 | signal_levels |= DP_PRE_EMPHASIS_6; | |
1510 | break; | |
1511 | case DP_TRAIN_PRE_EMPHASIS_9_5: | |
1512 | signal_levels |= DP_PRE_EMPHASIS_9_5; | |
1513 | break; | |
1514 | } | |
1515 | return signal_levels; | |
1516 | } | |
1517 | ||
e3421a18 ZW |
1518 | /* Gen6's DP voltage swing and pre-emphasis control */ |
1519 | static uint32_t | |
1520 | intel_gen6_edp_signal_levels(uint8_t train_set) | |
1521 | { | |
3c5a62b5 YL |
1522 | int signal_levels = train_set & (DP_TRAIN_VOLTAGE_SWING_MASK | |
1523 | DP_TRAIN_PRE_EMPHASIS_MASK); | |
1524 | switch (signal_levels) { | |
e3421a18 | 1525 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_0: |
3c5a62b5 YL |
1526 | case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_0: |
1527 | return EDP_LINK_TRAIN_400_600MV_0DB_SNB_B; | |
1528 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_3_5: | |
1529 | return EDP_LINK_TRAIN_400MV_3_5DB_SNB_B; | |
e3421a18 | 1530 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_6: |
3c5a62b5 YL |
1531 | case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_6: |
1532 | return EDP_LINK_TRAIN_400_600MV_6DB_SNB_B; | |
e3421a18 | 1533 | case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_3_5: |
3c5a62b5 YL |
1534 | case DP_TRAIN_VOLTAGE_SWING_800 | DP_TRAIN_PRE_EMPHASIS_3_5: |
1535 | return EDP_LINK_TRAIN_600_800MV_3_5DB_SNB_B; | |
e3421a18 | 1536 | case DP_TRAIN_VOLTAGE_SWING_800 | DP_TRAIN_PRE_EMPHASIS_0: |
3c5a62b5 YL |
1537 | case DP_TRAIN_VOLTAGE_SWING_1200 | DP_TRAIN_PRE_EMPHASIS_0: |
1538 | return EDP_LINK_TRAIN_800_1200MV_0DB_SNB_B; | |
e3421a18 | 1539 | default: |
3c5a62b5 YL |
1540 | DRM_DEBUG_KMS("Unsupported voltage swing/pre-emphasis level:" |
1541 | "0x%x\n", signal_levels); | |
1542 | return EDP_LINK_TRAIN_400_600MV_0DB_SNB_B; | |
e3421a18 ZW |
1543 | } |
1544 | } | |
1545 | ||
1a2eb460 KP |
1546 | /* Gen7's DP voltage swing and pre-emphasis control */ |
1547 | static uint32_t | |
1548 | intel_gen7_edp_signal_levels(uint8_t train_set) | |
1549 | { | |
1550 | int signal_levels = train_set & (DP_TRAIN_VOLTAGE_SWING_MASK | | |
1551 | DP_TRAIN_PRE_EMPHASIS_MASK); | |
1552 | switch (signal_levels) { | |
1553 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_0: | |
1554 | return EDP_LINK_TRAIN_400MV_0DB_IVB; | |
1555 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_3_5: | |
1556 | return EDP_LINK_TRAIN_400MV_3_5DB_IVB; | |
1557 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_6: | |
1558 | return EDP_LINK_TRAIN_400MV_6DB_IVB; | |
1559 | ||
1560 | case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_0: | |
1561 | return EDP_LINK_TRAIN_600MV_0DB_IVB; | |
1562 | case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_3_5: | |
1563 | return EDP_LINK_TRAIN_600MV_3_5DB_IVB; | |
1564 | ||
1565 | case DP_TRAIN_VOLTAGE_SWING_800 | DP_TRAIN_PRE_EMPHASIS_0: | |
1566 | return EDP_LINK_TRAIN_800MV_0DB_IVB; | |
1567 | case DP_TRAIN_VOLTAGE_SWING_800 | DP_TRAIN_PRE_EMPHASIS_3_5: | |
1568 | return EDP_LINK_TRAIN_800MV_3_5DB_IVB; | |
1569 | ||
1570 | default: | |
1571 | DRM_DEBUG_KMS("Unsupported voltage swing/pre-emphasis level:" | |
1572 | "0x%x\n", signal_levels); | |
1573 | return EDP_LINK_TRAIN_500MV_0DB_IVB; | |
1574 | } | |
1575 | } | |
1576 | ||
a4fc5ed6 KP |
1577 | static uint8_t |
1578 | intel_get_lane_status(uint8_t link_status[DP_LINK_STATUS_SIZE], | |
1579 | int lane) | |
1580 | { | |
a4fc5ed6 | 1581 | int s = (lane & 1) * 4; |
93f62dad | 1582 | uint8_t l = link_status[lane>>1]; |
a4fc5ed6 KP |
1583 | |
1584 | return (l >> s) & 0xf; | |
1585 | } | |
1586 | ||
1587 | /* Check for clock recovery is done on all channels */ | |
1588 | static bool | |
1589 | intel_clock_recovery_ok(uint8_t link_status[DP_LINK_STATUS_SIZE], int lane_count) | |
1590 | { | |
1591 | int lane; | |
1592 | uint8_t lane_status; | |
1593 | ||
1594 | for (lane = 0; lane < lane_count; lane++) { | |
1595 | lane_status = intel_get_lane_status(link_status, lane); | |
1596 | if ((lane_status & DP_LANE_CR_DONE) == 0) | |
1597 | return false; | |
1598 | } | |
1599 | return true; | |
1600 | } | |
1601 | ||
1602 | /* Check to see if channel eq is done on all channels */ | |
1603 | #define CHANNEL_EQ_BITS (DP_LANE_CR_DONE|\ | |
1604 | DP_LANE_CHANNEL_EQ_DONE|\ | |
1605 | DP_LANE_SYMBOL_LOCKED) | |
1606 | static bool | |
93f62dad | 1607 | intel_channel_eq_ok(struct intel_dp *intel_dp, uint8_t link_status[DP_LINK_STATUS_SIZE]) |
a4fc5ed6 KP |
1608 | { |
1609 | uint8_t lane_align; | |
1610 | uint8_t lane_status; | |
1611 | int lane; | |
1612 | ||
93f62dad | 1613 | lane_align = intel_dp_link_status(link_status, |
a4fc5ed6 KP |
1614 | DP_LANE_ALIGN_STATUS_UPDATED); |
1615 | if ((lane_align & DP_INTERLANE_ALIGN_DONE) == 0) | |
1616 | return false; | |
33a34e4e | 1617 | for (lane = 0; lane < intel_dp->lane_count; lane++) { |
93f62dad | 1618 | lane_status = intel_get_lane_status(link_status, lane); |
a4fc5ed6 KP |
1619 | if ((lane_status & CHANNEL_EQ_BITS) != CHANNEL_EQ_BITS) |
1620 | return false; | |
1621 | } | |
1622 | return true; | |
1623 | } | |
1624 | ||
1625 | static bool | |
ea5b213a | 1626 | intel_dp_set_link_train(struct intel_dp *intel_dp, |
a4fc5ed6 | 1627 | uint32_t dp_reg_value, |
58e10eb9 | 1628 | uint8_t dp_train_pat) |
a4fc5ed6 | 1629 | { |
4ef69c7a | 1630 | struct drm_device *dev = intel_dp->base.base.dev; |
a4fc5ed6 | 1631 | struct drm_i915_private *dev_priv = dev->dev_private; |
a4fc5ed6 KP |
1632 | int ret; |
1633 | ||
ea5b213a CW |
1634 | I915_WRITE(intel_dp->output_reg, dp_reg_value); |
1635 | POSTING_READ(intel_dp->output_reg); | |
a4fc5ed6 | 1636 | |
ea5b213a | 1637 | intel_dp_aux_native_write_1(intel_dp, |
a4fc5ed6 KP |
1638 | DP_TRAINING_PATTERN_SET, |
1639 | dp_train_pat); | |
1640 | ||
ea5b213a | 1641 | ret = intel_dp_aux_native_write(intel_dp, |
58e10eb9 | 1642 | DP_TRAINING_LANE0_SET, |
b34f1f09 KP |
1643 | intel_dp->train_set, |
1644 | intel_dp->lane_count); | |
1645 | if (ret != intel_dp->lane_count) | |
a4fc5ed6 KP |
1646 | return false; |
1647 | ||
1648 | return true; | |
1649 | } | |
1650 | ||
33a34e4e | 1651 | /* Enable corresponding port and start training pattern 1 */ |
a4fc5ed6 | 1652 | static void |
33a34e4e | 1653 | intel_dp_start_link_train(struct intel_dp *intel_dp) |
a4fc5ed6 | 1654 | { |
4ef69c7a | 1655 | struct drm_device *dev = intel_dp->base.base.dev; |
a4fc5ed6 | 1656 | struct drm_i915_private *dev_priv = dev->dev_private; |
58e10eb9 | 1657 | struct intel_crtc *intel_crtc = to_intel_crtc(intel_dp->base.base.crtc); |
a4fc5ed6 KP |
1658 | int i; |
1659 | uint8_t voltage; | |
1660 | bool clock_recovery = false; | |
cdb0e95b | 1661 | int voltage_tries, loop_tries; |
e3421a18 | 1662 | u32 reg; |
ea5b213a | 1663 | uint32_t DP = intel_dp->DP; |
a4fc5ed6 | 1664 | |
e8519464 AJ |
1665 | /* |
1666 | * On CPT we have to enable the port in training pattern 1, which | |
1667 | * will happen below in intel_dp_set_link_train. Otherwise, enable | |
1668 | * the port and wait for it to become active. | |
1669 | */ | |
1670 | if (!HAS_PCH_CPT(dev)) { | |
1671 | I915_WRITE(intel_dp->output_reg, intel_dp->DP); | |
1672 | POSTING_READ(intel_dp->output_reg); | |
1673 | intel_wait_for_vblank(dev, intel_crtc->pipe); | |
1674 | } | |
a4fc5ed6 | 1675 | |
3cf2efb1 CW |
1676 | /* Write the link configuration data */ |
1677 | intel_dp_aux_native_write(intel_dp, DP_LINK_BW_SET, | |
1678 | intel_dp->link_configuration, | |
1679 | DP_LINK_CONFIGURATION_SIZE); | |
a4fc5ed6 KP |
1680 | |
1681 | DP |= DP_PORT_EN; | |
1a2eb460 KP |
1682 | |
1683 | if (HAS_PCH_CPT(dev) && (IS_GEN7(dev) || !is_cpu_edp(intel_dp))) | |
e3421a18 ZW |
1684 | DP &= ~DP_LINK_TRAIN_MASK_CPT; |
1685 | else | |
1686 | DP &= ~DP_LINK_TRAIN_MASK; | |
33a34e4e | 1687 | memset(intel_dp->train_set, 0, 4); |
a4fc5ed6 | 1688 | voltage = 0xff; |
cdb0e95b KP |
1689 | voltage_tries = 0; |
1690 | loop_tries = 0; | |
a4fc5ed6 KP |
1691 | clock_recovery = false; |
1692 | for (;;) { | |
33a34e4e | 1693 | /* Use intel_dp->train_set[0] to set the voltage and pre emphasis values */ |
93f62dad | 1694 | uint8_t link_status[DP_LINK_STATUS_SIZE]; |
e3421a18 | 1695 | uint32_t signal_levels; |
417e822d | 1696 | |
1a2eb460 KP |
1697 | |
1698 | if (IS_GEN7(dev) && is_cpu_edp(intel_dp)) { | |
1699 | signal_levels = intel_gen7_edp_signal_levels(intel_dp->train_set[0]); | |
1700 | DP = (DP & ~EDP_LINK_TRAIN_VOL_EMP_MASK_IVB) | signal_levels; | |
1701 | } else if (IS_GEN6(dev) && is_cpu_edp(intel_dp)) { | |
33a34e4e | 1702 | signal_levels = intel_gen6_edp_signal_levels(intel_dp->train_set[0]); |
e3421a18 ZW |
1703 | DP = (DP & ~EDP_LINK_TRAIN_VOL_EMP_MASK_SNB) | signal_levels; |
1704 | } else { | |
93f62dad KP |
1705 | signal_levels = intel_dp_signal_levels(intel_dp->train_set[0]); |
1706 | DRM_DEBUG_KMS("training pattern 1 signal levels %08x\n", signal_levels); | |
e3421a18 ZW |
1707 | DP = (DP & ~(DP_VOLTAGE_MASK|DP_PRE_EMPHASIS_MASK)) | signal_levels; |
1708 | } | |
a4fc5ed6 | 1709 | |
1a2eb460 | 1710 | if (HAS_PCH_CPT(dev) && (IS_GEN7(dev) || !is_cpu_edp(intel_dp))) |
e3421a18 ZW |
1711 | reg = DP | DP_LINK_TRAIN_PAT_1_CPT; |
1712 | else | |
1713 | reg = DP | DP_LINK_TRAIN_PAT_1; | |
1714 | ||
ea5b213a | 1715 | if (!intel_dp_set_link_train(intel_dp, reg, |
81055854 AJ |
1716 | DP_TRAINING_PATTERN_1 | |
1717 | DP_LINK_SCRAMBLING_DISABLE)) | |
a4fc5ed6 | 1718 | break; |
a4fc5ed6 KP |
1719 | /* Set training pattern 1 */ |
1720 | ||
3cf2efb1 | 1721 | udelay(100); |
93f62dad KP |
1722 | if (!intel_dp_get_link_status(intel_dp, link_status)) { |
1723 | DRM_ERROR("failed to get link status\n"); | |
a4fc5ed6 | 1724 | break; |
93f62dad | 1725 | } |
a4fc5ed6 | 1726 | |
93f62dad KP |
1727 | if (intel_clock_recovery_ok(link_status, intel_dp->lane_count)) { |
1728 | DRM_DEBUG_KMS("clock recovery OK\n"); | |
3cf2efb1 CW |
1729 | clock_recovery = true; |
1730 | break; | |
1731 | } | |
1732 | ||
1733 | /* Check to see if we've tried the max voltage */ | |
1734 | for (i = 0; i < intel_dp->lane_count; i++) | |
1735 | if ((intel_dp->train_set[i] & DP_TRAIN_MAX_SWING_REACHED) == 0) | |
a4fc5ed6 | 1736 | break; |
cdb0e95b KP |
1737 | if (i == intel_dp->lane_count) { |
1738 | ++loop_tries; | |
1739 | if (loop_tries == 5) { | |
1740 | DRM_DEBUG_KMS("too many full retries, give up\n"); | |
1741 | break; | |
1742 | } | |
1743 | memset(intel_dp->train_set, 0, 4); | |
1744 | voltage_tries = 0; | |
1745 | continue; | |
1746 | } | |
a4fc5ed6 | 1747 | |
3cf2efb1 CW |
1748 | /* Check to see if we've tried the same voltage 5 times */ |
1749 | if ((intel_dp->train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK) == voltage) { | |
cdb0e95b KP |
1750 | ++voltage_tries; |
1751 | if (voltage_tries == 5) { | |
1752 | DRM_DEBUG_KMS("too many voltage retries, give up\n"); | |
a4fc5ed6 | 1753 | break; |
cdb0e95b | 1754 | } |
3cf2efb1 | 1755 | } else |
cdb0e95b | 1756 | voltage_tries = 0; |
3cf2efb1 | 1757 | voltage = intel_dp->train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK; |
a4fc5ed6 | 1758 | |
3cf2efb1 | 1759 | /* Compute new intel_dp->train_set as requested by target */ |
93f62dad | 1760 | intel_get_adjust_train(intel_dp, link_status); |
a4fc5ed6 KP |
1761 | } |
1762 | ||
33a34e4e JB |
1763 | intel_dp->DP = DP; |
1764 | } | |
1765 | ||
1766 | static void | |
1767 | intel_dp_complete_link_train(struct intel_dp *intel_dp) | |
1768 | { | |
4ef69c7a | 1769 | struct drm_device *dev = intel_dp->base.base.dev; |
33a34e4e JB |
1770 | struct drm_i915_private *dev_priv = dev->dev_private; |
1771 | bool channel_eq = false; | |
37f80975 | 1772 | int tries, cr_tries; |
33a34e4e JB |
1773 | u32 reg; |
1774 | uint32_t DP = intel_dp->DP; | |
1775 | ||
a4fc5ed6 KP |
1776 | /* channel equalization */ |
1777 | tries = 0; | |
37f80975 | 1778 | cr_tries = 0; |
a4fc5ed6 KP |
1779 | channel_eq = false; |
1780 | for (;;) { | |
33a34e4e | 1781 | /* Use intel_dp->train_set[0] to set the voltage and pre emphasis values */ |
e3421a18 | 1782 | uint32_t signal_levels; |
93f62dad | 1783 | uint8_t link_status[DP_LINK_STATUS_SIZE]; |
e3421a18 | 1784 | |
37f80975 JB |
1785 | if (cr_tries > 5) { |
1786 | DRM_ERROR("failed to train DP, aborting\n"); | |
1787 | intel_dp_link_down(intel_dp); | |
1788 | break; | |
1789 | } | |
1790 | ||
1a2eb460 KP |
1791 | if (IS_GEN7(dev) && is_cpu_edp(intel_dp)) { |
1792 | signal_levels = intel_gen7_edp_signal_levels(intel_dp->train_set[0]); | |
1793 | DP = (DP & ~EDP_LINK_TRAIN_VOL_EMP_MASK_IVB) | signal_levels; | |
1794 | } else if (IS_GEN6(dev) && is_cpu_edp(intel_dp)) { | |
33a34e4e | 1795 | signal_levels = intel_gen6_edp_signal_levels(intel_dp->train_set[0]); |
e3421a18 ZW |
1796 | DP = (DP & ~EDP_LINK_TRAIN_VOL_EMP_MASK_SNB) | signal_levels; |
1797 | } else { | |
93f62dad | 1798 | signal_levels = intel_dp_signal_levels(intel_dp->train_set[0]); |
e3421a18 ZW |
1799 | DP = (DP & ~(DP_VOLTAGE_MASK|DP_PRE_EMPHASIS_MASK)) | signal_levels; |
1800 | } | |
1801 | ||
1a2eb460 | 1802 | if (HAS_PCH_CPT(dev) && (IS_GEN7(dev) || !is_cpu_edp(intel_dp))) |
e3421a18 ZW |
1803 | reg = DP | DP_LINK_TRAIN_PAT_2_CPT; |
1804 | else | |
1805 | reg = DP | DP_LINK_TRAIN_PAT_2; | |
a4fc5ed6 KP |
1806 | |
1807 | /* channel eq pattern */ | |
ea5b213a | 1808 | if (!intel_dp_set_link_train(intel_dp, reg, |
81055854 AJ |
1809 | DP_TRAINING_PATTERN_2 | |
1810 | DP_LINK_SCRAMBLING_DISABLE)) | |
a4fc5ed6 KP |
1811 | break; |
1812 | ||
3cf2efb1 | 1813 | udelay(400); |
93f62dad | 1814 | if (!intel_dp_get_link_status(intel_dp, link_status)) |
a4fc5ed6 | 1815 | break; |
a4fc5ed6 | 1816 | |
37f80975 | 1817 | /* Make sure clock is still ok */ |
93f62dad | 1818 | if (!intel_clock_recovery_ok(link_status, intel_dp->lane_count)) { |
37f80975 JB |
1819 | intel_dp_start_link_train(intel_dp); |
1820 | cr_tries++; | |
1821 | continue; | |
1822 | } | |
1823 | ||
93f62dad | 1824 | if (intel_channel_eq_ok(intel_dp, link_status)) { |
3cf2efb1 CW |
1825 | channel_eq = true; |
1826 | break; | |
1827 | } | |
a4fc5ed6 | 1828 | |
37f80975 JB |
1829 | /* Try 5 times, then try clock recovery if that fails */ |
1830 | if (tries > 5) { | |
1831 | intel_dp_link_down(intel_dp); | |
1832 | intel_dp_start_link_train(intel_dp); | |
1833 | tries = 0; | |
1834 | cr_tries++; | |
1835 | continue; | |
1836 | } | |
a4fc5ed6 | 1837 | |
3cf2efb1 | 1838 | /* Compute new intel_dp->train_set as requested by target */ |
93f62dad | 1839 | intel_get_adjust_train(intel_dp, link_status); |
3cf2efb1 | 1840 | ++tries; |
869184a6 | 1841 | } |
3cf2efb1 | 1842 | |
1a2eb460 | 1843 | if (HAS_PCH_CPT(dev) && (IS_GEN7(dev) || !is_cpu_edp(intel_dp))) |
e3421a18 ZW |
1844 | reg = DP | DP_LINK_TRAIN_OFF_CPT; |
1845 | else | |
1846 | reg = DP | DP_LINK_TRAIN_OFF; | |
1847 | ||
ea5b213a CW |
1848 | I915_WRITE(intel_dp->output_reg, reg); |
1849 | POSTING_READ(intel_dp->output_reg); | |
1850 | intel_dp_aux_native_write_1(intel_dp, | |
a4fc5ed6 KP |
1851 | DP_TRAINING_PATTERN_SET, DP_TRAINING_PATTERN_DISABLE); |
1852 | } | |
1853 | ||
1854 | static void | |
ea5b213a | 1855 | intel_dp_link_down(struct intel_dp *intel_dp) |
a4fc5ed6 | 1856 | { |
4ef69c7a | 1857 | struct drm_device *dev = intel_dp->base.base.dev; |
a4fc5ed6 | 1858 | struct drm_i915_private *dev_priv = dev->dev_private; |
ea5b213a | 1859 | uint32_t DP = intel_dp->DP; |
a4fc5ed6 | 1860 | |
1b39d6f3 CW |
1861 | if ((I915_READ(intel_dp->output_reg) & DP_PORT_EN) == 0) |
1862 | return; | |
1863 | ||
28c97730 | 1864 | DRM_DEBUG_KMS("\n"); |
32f9d658 | 1865 | |
cfcb0fc9 | 1866 | if (is_edp(intel_dp)) { |
32f9d658 | 1867 | DP &= ~DP_PLL_ENABLE; |
ea5b213a CW |
1868 | I915_WRITE(intel_dp->output_reg, DP); |
1869 | POSTING_READ(intel_dp->output_reg); | |
32f9d658 ZW |
1870 | udelay(100); |
1871 | } | |
1872 | ||
1a2eb460 | 1873 | if (HAS_PCH_CPT(dev) && (IS_GEN7(dev) || !is_cpu_edp(intel_dp))) { |
e3421a18 | 1874 | DP &= ~DP_LINK_TRAIN_MASK_CPT; |
ea5b213a | 1875 | I915_WRITE(intel_dp->output_reg, DP | DP_LINK_TRAIN_PAT_IDLE_CPT); |
e3421a18 ZW |
1876 | } else { |
1877 | DP &= ~DP_LINK_TRAIN_MASK; | |
ea5b213a | 1878 | I915_WRITE(intel_dp->output_reg, DP | DP_LINK_TRAIN_PAT_IDLE); |
e3421a18 | 1879 | } |
fe255d00 | 1880 | POSTING_READ(intel_dp->output_reg); |
5eb08b69 | 1881 | |
fe255d00 | 1882 | msleep(17); |
5eb08b69 | 1883 | |
417e822d | 1884 | if (is_edp(intel_dp)) { |
1a2eb460 | 1885 | if (HAS_PCH_CPT(dev) && (IS_GEN7(dev) || !is_cpu_edp(intel_dp))) |
417e822d KP |
1886 | DP |= DP_LINK_TRAIN_OFF_CPT; |
1887 | else | |
1888 | DP |= DP_LINK_TRAIN_OFF; | |
1889 | } | |
5bddd17f | 1890 | |
1b39d6f3 CW |
1891 | if (!HAS_PCH_CPT(dev) && |
1892 | I915_READ(intel_dp->output_reg) & DP_PIPEB_SELECT) { | |
31acbcc4 CW |
1893 | struct drm_crtc *crtc = intel_dp->base.base.crtc; |
1894 | ||
5bddd17f EA |
1895 | /* Hardware workaround: leaving our transcoder select |
1896 | * set to transcoder B while it's off will prevent the | |
1897 | * corresponding HDMI output on transcoder A. | |
1898 | * | |
1899 | * Combine this with another hardware workaround: | |
1900 | * transcoder select bit can only be cleared while the | |
1901 | * port is enabled. | |
1902 | */ | |
1903 | DP &= ~DP_PIPEB_SELECT; | |
1904 | I915_WRITE(intel_dp->output_reg, DP); | |
1905 | ||
1906 | /* Changes to enable or select take place the vblank | |
1907 | * after being written. | |
1908 | */ | |
31acbcc4 CW |
1909 | if (crtc == NULL) { |
1910 | /* We can arrive here never having been attached | |
1911 | * to a CRTC, for instance, due to inheriting | |
1912 | * random state from the BIOS. | |
1913 | * | |
1914 | * If the pipe is not running, play safe and | |
1915 | * wait for the clocks to stabilise before | |
1916 | * continuing. | |
1917 | */ | |
1918 | POSTING_READ(intel_dp->output_reg); | |
1919 | msleep(50); | |
1920 | } else | |
1921 | intel_wait_for_vblank(dev, to_intel_crtc(crtc)->pipe); | |
5bddd17f EA |
1922 | } |
1923 | ||
832afda6 | 1924 | DP &= ~DP_AUDIO_OUTPUT_ENABLE; |
ea5b213a CW |
1925 | I915_WRITE(intel_dp->output_reg, DP & ~DP_PORT_EN); |
1926 | POSTING_READ(intel_dp->output_reg); | |
f01eca2e | 1927 | msleep(intel_dp->panel_power_down_delay); |
a4fc5ed6 KP |
1928 | } |
1929 | ||
26d61aad KP |
1930 | static bool |
1931 | intel_dp_get_dpcd(struct intel_dp *intel_dp) | |
92fd8fd1 | 1932 | { |
92fd8fd1 | 1933 | if (intel_dp_aux_native_read_retry(intel_dp, 0x000, intel_dp->dpcd, |
0206e353 | 1934 | sizeof(intel_dp->dpcd)) && |
92fd8fd1 | 1935 | (intel_dp->dpcd[DP_DPCD_REV] != 0)) { |
26d61aad | 1936 | return true; |
92fd8fd1 KP |
1937 | } |
1938 | ||
26d61aad | 1939 | return false; |
92fd8fd1 KP |
1940 | } |
1941 | ||
a60f0e38 JB |
1942 | static bool |
1943 | intel_dp_get_sink_irq(struct intel_dp *intel_dp, u8 *sink_irq_vector) | |
1944 | { | |
1945 | int ret; | |
1946 | ||
1947 | ret = intel_dp_aux_native_read_retry(intel_dp, | |
1948 | DP_DEVICE_SERVICE_IRQ_VECTOR, | |
1949 | sink_irq_vector, 1); | |
1950 | if (!ret) | |
1951 | return false; | |
1952 | ||
1953 | return true; | |
1954 | } | |
1955 | ||
1956 | static void | |
1957 | intel_dp_handle_test_request(struct intel_dp *intel_dp) | |
1958 | { | |
1959 | /* NAK by default */ | |
1960 | intel_dp_aux_native_write_1(intel_dp, DP_TEST_RESPONSE, DP_TEST_ACK); | |
1961 | } | |
1962 | ||
a4fc5ed6 KP |
1963 | /* |
1964 | * According to DP spec | |
1965 | * 5.1.2: | |
1966 | * 1. Read DPCD | |
1967 | * 2. Configure link according to Receiver Capabilities | |
1968 | * 3. Use Link Training from 2.5.3.3 and 3.5.1.3 | |
1969 | * 4. Check link status on receipt of hot-plug interrupt | |
1970 | */ | |
1971 | ||
1972 | static void | |
ea5b213a | 1973 | intel_dp_check_link_status(struct intel_dp *intel_dp) |
a4fc5ed6 | 1974 | { |
a60f0e38 | 1975 | u8 sink_irq_vector; |
93f62dad | 1976 | u8 link_status[DP_LINK_STATUS_SIZE]; |
a60f0e38 | 1977 | |
d2b996ac KP |
1978 | if (intel_dp->dpms_mode != DRM_MODE_DPMS_ON) |
1979 | return; | |
59cd09e1 | 1980 | |
4ef69c7a | 1981 | if (!intel_dp->base.base.crtc) |
a4fc5ed6 KP |
1982 | return; |
1983 | ||
92fd8fd1 | 1984 | /* Try to read receiver status if the link appears to be up */ |
93f62dad | 1985 | if (!intel_dp_get_link_status(intel_dp, link_status)) { |
ea5b213a | 1986 | intel_dp_link_down(intel_dp); |
a4fc5ed6 KP |
1987 | return; |
1988 | } | |
1989 | ||
92fd8fd1 | 1990 | /* Now read the DPCD to see if it's actually running */ |
26d61aad | 1991 | if (!intel_dp_get_dpcd(intel_dp)) { |
59cd09e1 JB |
1992 | intel_dp_link_down(intel_dp); |
1993 | return; | |
1994 | } | |
1995 | ||
a60f0e38 JB |
1996 | /* Try to read the source of the interrupt */ |
1997 | if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11 && | |
1998 | intel_dp_get_sink_irq(intel_dp, &sink_irq_vector)) { | |
1999 | /* Clear interrupt source */ | |
2000 | intel_dp_aux_native_write_1(intel_dp, | |
2001 | DP_DEVICE_SERVICE_IRQ_VECTOR, | |
2002 | sink_irq_vector); | |
2003 | ||
2004 | if (sink_irq_vector & DP_AUTOMATED_TEST_REQUEST) | |
2005 | intel_dp_handle_test_request(intel_dp); | |
2006 | if (sink_irq_vector & (DP_CP_IRQ | DP_SINK_SPECIFIC_IRQ)) | |
2007 | DRM_DEBUG_DRIVER("CP or sink specific irq unhandled\n"); | |
2008 | } | |
2009 | ||
93f62dad | 2010 | if (!intel_channel_eq_ok(intel_dp, link_status)) { |
92fd8fd1 KP |
2011 | DRM_DEBUG_KMS("%s: channel EQ not ok, retraining\n", |
2012 | drm_get_encoder_name(&intel_dp->base.base)); | |
33a34e4e JB |
2013 | intel_dp_start_link_train(intel_dp); |
2014 | intel_dp_complete_link_train(intel_dp); | |
2015 | } | |
a4fc5ed6 | 2016 | } |
a4fc5ed6 | 2017 | |
71ba9000 | 2018 | static enum drm_connector_status |
26d61aad | 2019 | intel_dp_detect_dpcd(struct intel_dp *intel_dp) |
71ba9000 | 2020 | { |
26d61aad KP |
2021 | if (intel_dp_get_dpcd(intel_dp)) |
2022 | return connector_status_connected; | |
2023 | return connector_status_disconnected; | |
71ba9000 AJ |
2024 | } |
2025 | ||
5eb08b69 | 2026 | static enum drm_connector_status |
a9756bb5 | 2027 | ironlake_dp_detect(struct intel_dp *intel_dp) |
5eb08b69 | 2028 | { |
5eb08b69 ZW |
2029 | enum drm_connector_status status; |
2030 | ||
fe16d949 CW |
2031 | /* Can't disconnect eDP, but you can close the lid... */ |
2032 | if (is_edp(intel_dp)) { | |
2033 | status = intel_panel_detect(intel_dp->base.base.dev); | |
2034 | if (status == connector_status_unknown) | |
2035 | status = connector_status_connected; | |
2036 | return status; | |
2037 | } | |
01cb9ea6 | 2038 | |
26d61aad | 2039 | return intel_dp_detect_dpcd(intel_dp); |
5eb08b69 ZW |
2040 | } |
2041 | ||
a4fc5ed6 | 2042 | static enum drm_connector_status |
a9756bb5 | 2043 | g4x_dp_detect(struct intel_dp *intel_dp) |
a4fc5ed6 | 2044 | { |
4ef69c7a | 2045 | struct drm_device *dev = intel_dp->base.base.dev; |
a4fc5ed6 | 2046 | struct drm_i915_private *dev_priv = dev->dev_private; |
a9756bb5 | 2047 | uint32_t temp, bit; |
5eb08b69 | 2048 | |
ea5b213a | 2049 | switch (intel_dp->output_reg) { |
a4fc5ed6 KP |
2050 | case DP_B: |
2051 | bit = DPB_HOTPLUG_INT_STATUS; | |
2052 | break; | |
2053 | case DP_C: | |
2054 | bit = DPC_HOTPLUG_INT_STATUS; | |
2055 | break; | |
2056 | case DP_D: | |
2057 | bit = DPD_HOTPLUG_INT_STATUS; | |
2058 | break; | |
2059 | default: | |
2060 | return connector_status_unknown; | |
2061 | } | |
2062 | ||
2063 | temp = I915_READ(PORT_HOTPLUG_STAT); | |
2064 | ||
2065 | if ((temp & bit) == 0) | |
2066 | return connector_status_disconnected; | |
2067 | ||
26d61aad | 2068 | return intel_dp_detect_dpcd(intel_dp); |
a9756bb5 ZW |
2069 | } |
2070 | ||
8c241fef KP |
2071 | static struct edid * |
2072 | intel_dp_get_edid(struct drm_connector *connector, struct i2c_adapter *adapter) | |
2073 | { | |
2074 | struct intel_dp *intel_dp = intel_attached_dp(connector); | |
2075 | struct edid *edid; | |
2076 | ||
2077 | ironlake_edp_panel_vdd_on(intel_dp); | |
2078 | edid = drm_get_edid(connector, adapter); | |
bd943159 | 2079 | ironlake_edp_panel_vdd_off(intel_dp, false); |
8c241fef KP |
2080 | return edid; |
2081 | } | |
2082 | ||
2083 | static int | |
2084 | intel_dp_get_edid_modes(struct drm_connector *connector, struct i2c_adapter *adapter) | |
2085 | { | |
2086 | struct intel_dp *intel_dp = intel_attached_dp(connector); | |
2087 | int ret; | |
2088 | ||
2089 | ironlake_edp_panel_vdd_on(intel_dp); | |
2090 | ret = intel_ddc_get_modes(connector, adapter); | |
bd943159 | 2091 | ironlake_edp_panel_vdd_off(intel_dp, false); |
8c241fef KP |
2092 | return ret; |
2093 | } | |
2094 | ||
2095 | ||
a9756bb5 ZW |
2096 | /** |
2097 | * Uses CRT_HOTPLUG_EN and CRT_HOTPLUG_STAT to detect DP connection. | |
2098 | * | |
2099 | * \return true if DP port is connected. | |
2100 | * \return false if DP port is disconnected. | |
2101 | */ | |
2102 | static enum drm_connector_status | |
2103 | intel_dp_detect(struct drm_connector *connector, bool force) | |
2104 | { | |
2105 | struct intel_dp *intel_dp = intel_attached_dp(connector); | |
2106 | struct drm_device *dev = intel_dp->base.base.dev; | |
2107 | enum drm_connector_status status; | |
2108 | struct edid *edid = NULL; | |
2109 | ||
2110 | intel_dp->has_audio = false; | |
2111 | ||
2112 | if (HAS_PCH_SPLIT(dev)) | |
2113 | status = ironlake_dp_detect(intel_dp); | |
2114 | else | |
2115 | status = g4x_dp_detect(intel_dp); | |
1b9be9d0 | 2116 | |
ac66ae83 AJ |
2117 | DRM_DEBUG_KMS("DPCD: %02hx%02hx%02hx%02hx%02hx%02hx%02hx%02hx\n", |
2118 | intel_dp->dpcd[0], intel_dp->dpcd[1], intel_dp->dpcd[2], | |
2119 | intel_dp->dpcd[3], intel_dp->dpcd[4], intel_dp->dpcd[5], | |
2120 | intel_dp->dpcd[6], intel_dp->dpcd[7]); | |
1b9be9d0 | 2121 | |
a9756bb5 ZW |
2122 | if (status != connector_status_connected) |
2123 | return status; | |
2124 | ||
f684960e CW |
2125 | if (intel_dp->force_audio) { |
2126 | intel_dp->has_audio = intel_dp->force_audio > 0; | |
2127 | } else { | |
8c241fef | 2128 | edid = intel_dp_get_edid(connector, &intel_dp->adapter); |
f684960e CW |
2129 | if (edid) { |
2130 | intel_dp->has_audio = drm_detect_monitor_audio(edid); | |
2131 | connector->display_info.raw_edid = NULL; | |
2132 | kfree(edid); | |
2133 | } | |
a9756bb5 ZW |
2134 | } |
2135 | ||
2136 | return connector_status_connected; | |
a4fc5ed6 KP |
2137 | } |
2138 | ||
2139 | static int intel_dp_get_modes(struct drm_connector *connector) | |
2140 | { | |
df0e9248 | 2141 | struct intel_dp *intel_dp = intel_attached_dp(connector); |
4ef69c7a | 2142 | struct drm_device *dev = intel_dp->base.base.dev; |
32f9d658 ZW |
2143 | struct drm_i915_private *dev_priv = dev->dev_private; |
2144 | int ret; | |
a4fc5ed6 KP |
2145 | |
2146 | /* We should parse the EDID data and find out if it has an audio sink | |
2147 | */ | |
2148 | ||
8c241fef | 2149 | ret = intel_dp_get_edid_modes(connector, &intel_dp->adapter); |
b9efc480 | 2150 | if (ret) { |
d15456de | 2151 | if (is_edp(intel_dp) && !intel_dp->panel_fixed_mode) { |
b9efc480 ZY |
2152 | struct drm_display_mode *newmode; |
2153 | list_for_each_entry(newmode, &connector->probed_modes, | |
2154 | head) { | |
d15456de KP |
2155 | if ((newmode->type & DRM_MODE_TYPE_PREFERRED)) { |
2156 | intel_dp->panel_fixed_mode = | |
b9efc480 ZY |
2157 | drm_mode_duplicate(dev, newmode); |
2158 | break; | |
2159 | } | |
2160 | } | |
2161 | } | |
32f9d658 | 2162 | return ret; |
b9efc480 | 2163 | } |
32f9d658 ZW |
2164 | |
2165 | /* if eDP has no EDID, try to use fixed panel mode from VBT */ | |
4d926461 | 2166 | if (is_edp(intel_dp)) { |
47f0eb22 | 2167 | /* initialize panel mode from VBT if available for eDP */ |
d15456de KP |
2168 | if (intel_dp->panel_fixed_mode == NULL && dev_priv->lfp_lvds_vbt_mode != NULL) { |
2169 | intel_dp->panel_fixed_mode = | |
47f0eb22 | 2170 | drm_mode_duplicate(dev, dev_priv->lfp_lvds_vbt_mode); |
d15456de KP |
2171 | if (intel_dp->panel_fixed_mode) { |
2172 | intel_dp->panel_fixed_mode->type |= | |
47f0eb22 KP |
2173 | DRM_MODE_TYPE_PREFERRED; |
2174 | } | |
2175 | } | |
d15456de | 2176 | if (intel_dp->panel_fixed_mode) { |
32f9d658 | 2177 | struct drm_display_mode *mode; |
d15456de | 2178 | mode = drm_mode_duplicate(dev, intel_dp->panel_fixed_mode); |
32f9d658 ZW |
2179 | drm_mode_probed_add(connector, mode); |
2180 | return 1; | |
2181 | } | |
2182 | } | |
2183 | return 0; | |
a4fc5ed6 KP |
2184 | } |
2185 | ||
1aad7ac0 CW |
2186 | static bool |
2187 | intel_dp_detect_audio(struct drm_connector *connector) | |
2188 | { | |
2189 | struct intel_dp *intel_dp = intel_attached_dp(connector); | |
2190 | struct edid *edid; | |
2191 | bool has_audio = false; | |
2192 | ||
8c241fef | 2193 | edid = intel_dp_get_edid(connector, &intel_dp->adapter); |
1aad7ac0 CW |
2194 | if (edid) { |
2195 | has_audio = drm_detect_monitor_audio(edid); | |
2196 | ||
2197 | connector->display_info.raw_edid = NULL; | |
2198 | kfree(edid); | |
2199 | } | |
2200 | ||
2201 | return has_audio; | |
2202 | } | |
2203 | ||
f684960e CW |
2204 | static int |
2205 | intel_dp_set_property(struct drm_connector *connector, | |
2206 | struct drm_property *property, | |
2207 | uint64_t val) | |
2208 | { | |
e953fd7b | 2209 | struct drm_i915_private *dev_priv = connector->dev->dev_private; |
f684960e CW |
2210 | struct intel_dp *intel_dp = intel_attached_dp(connector); |
2211 | int ret; | |
2212 | ||
2213 | ret = drm_connector_property_set_value(connector, property, val); | |
2214 | if (ret) | |
2215 | return ret; | |
2216 | ||
3f43c48d | 2217 | if (property == dev_priv->force_audio_property) { |
1aad7ac0 CW |
2218 | int i = val; |
2219 | bool has_audio; | |
2220 | ||
2221 | if (i == intel_dp->force_audio) | |
f684960e CW |
2222 | return 0; |
2223 | ||
1aad7ac0 | 2224 | intel_dp->force_audio = i; |
f684960e | 2225 | |
1aad7ac0 CW |
2226 | if (i == 0) |
2227 | has_audio = intel_dp_detect_audio(connector); | |
2228 | else | |
2229 | has_audio = i > 0; | |
2230 | ||
2231 | if (has_audio == intel_dp->has_audio) | |
f684960e CW |
2232 | return 0; |
2233 | ||
1aad7ac0 | 2234 | intel_dp->has_audio = has_audio; |
f684960e CW |
2235 | goto done; |
2236 | } | |
2237 | ||
e953fd7b CW |
2238 | if (property == dev_priv->broadcast_rgb_property) { |
2239 | if (val == !!intel_dp->color_range) | |
2240 | return 0; | |
2241 | ||
2242 | intel_dp->color_range = val ? DP_COLOR_RANGE_16_235 : 0; | |
2243 | goto done; | |
2244 | } | |
2245 | ||
f684960e CW |
2246 | return -EINVAL; |
2247 | ||
2248 | done: | |
2249 | if (intel_dp->base.base.crtc) { | |
2250 | struct drm_crtc *crtc = intel_dp->base.base.crtc; | |
2251 | drm_crtc_helper_set_mode(crtc, &crtc->mode, | |
2252 | crtc->x, crtc->y, | |
2253 | crtc->fb); | |
2254 | } | |
2255 | ||
2256 | return 0; | |
2257 | } | |
2258 | ||
a4fc5ed6 | 2259 | static void |
0206e353 | 2260 | intel_dp_destroy(struct drm_connector *connector) |
a4fc5ed6 | 2261 | { |
aaa6fd2a MG |
2262 | struct drm_device *dev = connector->dev; |
2263 | ||
2264 | if (intel_dpd_is_edp(dev)) | |
2265 | intel_panel_destroy_backlight(dev); | |
2266 | ||
a4fc5ed6 KP |
2267 | drm_sysfs_connector_remove(connector); |
2268 | drm_connector_cleanup(connector); | |
55f78c43 | 2269 | kfree(connector); |
a4fc5ed6 KP |
2270 | } |
2271 | ||
24d05927 DV |
2272 | static void intel_dp_encoder_destroy(struct drm_encoder *encoder) |
2273 | { | |
2274 | struct intel_dp *intel_dp = enc_to_intel_dp(encoder); | |
2275 | ||
2276 | i2c_del_adapter(&intel_dp->adapter); | |
2277 | drm_encoder_cleanup(encoder); | |
bd943159 KP |
2278 | if (is_edp(intel_dp)) { |
2279 | cancel_delayed_work_sync(&intel_dp->panel_vdd_work); | |
2280 | ironlake_panel_vdd_off_sync(intel_dp); | |
2281 | } | |
24d05927 DV |
2282 | kfree(intel_dp); |
2283 | } | |
2284 | ||
a4fc5ed6 KP |
2285 | static const struct drm_encoder_helper_funcs intel_dp_helper_funcs = { |
2286 | .dpms = intel_dp_dpms, | |
2287 | .mode_fixup = intel_dp_mode_fixup, | |
d240f20f | 2288 | .prepare = intel_dp_prepare, |
a4fc5ed6 | 2289 | .mode_set = intel_dp_mode_set, |
d240f20f | 2290 | .commit = intel_dp_commit, |
a4fc5ed6 KP |
2291 | }; |
2292 | ||
2293 | static const struct drm_connector_funcs intel_dp_connector_funcs = { | |
2294 | .dpms = drm_helper_connector_dpms, | |
a4fc5ed6 KP |
2295 | .detect = intel_dp_detect, |
2296 | .fill_modes = drm_helper_probe_single_connector_modes, | |
f684960e | 2297 | .set_property = intel_dp_set_property, |
a4fc5ed6 KP |
2298 | .destroy = intel_dp_destroy, |
2299 | }; | |
2300 | ||
2301 | static const struct drm_connector_helper_funcs intel_dp_connector_helper_funcs = { | |
2302 | .get_modes = intel_dp_get_modes, | |
2303 | .mode_valid = intel_dp_mode_valid, | |
df0e9248 | 2304 | .best_encoder = intel_best_encoder, |
a4fc5ed6 KP |
2305 | }; |
2306 | ||
a4fc5ed6 | 2307 | static const struct drm_encoder_funcs intel_dp_enc_funcs = { |
24d05927 | 2308 | .destroy = intel_dp_encoder_destroy, |
a4fc5ed6 KP |
2309 | }; |
2310 | ||
995b6762 | 2311 | static void |
21d40d37 | 2312 | intel_dp_hot_plug(struct intel_encoder *intel_encoder) |
c8110e52 | 2313 | { |
ea5b213a | 2314 | struct intel_dp *intel_dp = container_of(intel_encoder, struct intel_dp, base); |
c8110e52 | 2315 | |
885a5014 | 2316 | intel_dp_check_link_status(intel_dp); |
c8110e52 | 2317 | } |
6207937d | 2318 | |
e3421a18 ZW |
2319 | /* Return which DP Port should be selected for Transcoder DP control */ |
2320 | int | |
0206e353 | 2321 | intel_trans_dp_port_sel(struct drm_crtc *crtc) |
e3421a18 ZW |
2322 | { |
2323 | struct drm_device *dev = crtc->dev; | |
2324 | struct drm_mode_config *mode_config = &dev->mode_config; | |
2325 | struct drm_encoder *encoder; | |
e3421a18 ZW |
2326 | |
2327 | list_for_each_entry(encoder, &mode_config->encoder_list, head) { | |
ea5b213a CW |
2328 | struct intel_dp *intel_dp; |
2329 | ||
d8201ab6 | 2330 | if (encoder->crtc != crtc) |
e3421a18 ZW |
2331 | continue; |
2332 | ||
ea5b213a | 2333 | intel_dp = enc_to_intel_dp(encoder); |
417e822d KP |
2334 | if (intel_dp->base.type == INTEL_OUTPUT_DISPLAYPORT || |
2335 | intel_dp->base.type == INTEL_OUTPUT_EDP) | |
ea5b213a | 2336 | return intel_dp->output_reg; |
e3421a18 | 2337 | } |
ea5b213a | 2338 | |
e3421a18 ZW |
2339 | return -1; |
2340 | } | |
2341 | ||
36e83a18 | 2342 | /* check the VBT to see whether the eDP is on DP-D port */ |
cb0953d7 | 2343 | bool intel_dpd_is_edp(struct drm_device *dev) |
36e83a18 ZY |
2344 | { |
2345 | struct drm_i915_private *dev_priv = dev->dev_private; | |
2346 | struct child_device_config *p_child; | |
2347 | int i; | |
2348 | ||
2349 | if (!dev_priv->child_dev_num) | |
2350 | return false; | |
2351 | ||
2352 | for (i = 0; i < dev_priv->child_dev_num; i++) { | |
2353 | p_child = dev_priv->child_dev + i; | |
2354 | ||
2355 | if (p_child->dvo_port == PORT_IDPD && | |
2356 | p_child->device_type == DEVICE_TYPE_eDP) | |
2357 | return true; | |
2358 | } | |
2359 | return false; | |
2360 | } | |
2361 | ||
f684960e CW |
2362 | static void |
2363 | intel_dp_add_properties(struct intel_dp *intel_dp, struct drm_connector *connector) | |
2364 | { | |
3f43c48d | 2365 | intel_attach_force_audio_property(connector); |
e953fd7b | 2366 | intel_attach_broadcast_rgb_property(connector); |
f684960e CW |
2367 | } |
2368 | ||
a4fc5ed6 KP |
2369 | void |
2370 | intel_dp_init(struct drm_device *dev, int output_reg) | |
2371 | { | |
2372 | struct drm_i915_private *dev_priv = dev->dev_private; | |
2373 | struct drm_connector *connector; | |
ea5b213a | 2374 | struct intel_dp *intel_dp; |
21d40d37 | 2375 | struct intel_encoder *intel_encoder; |
55f78c43 | 2376 | struct intel_connector *intel_connector; |
5eb08b69 | 2377 | const char *name = NULL; |
b329530c | 2378 | int type; |
a4fc5ed6 | 2379 | |
ea5b213a CW |
2380 | intel_dp = kzalloc(sizeof(struct intel_dp), GFP_KERNEL); |
2381 | if (!intel_dp) | |
a4fc5ed6 KP |
2382 | return; |
2383 | ||
3d3dc149 | 2384 | intel_dp->output_reg = output_reg; |
d2b996ac | 2385 | intel_dp->dpms_mode = -1; |
3d3dc149 | 2386 | |
55f78c43 ZW |
2387 | intel_connector = kzalloc(sizeof(struct intel_connector), GFP_KERNEL); |
2388 | if (!intel_connector) { | |
ea5b213a | 2389 | kfree(intel_dp); |
55f78c43 ZW |
2390 | return; |
2391 | } | |
ea5b213a | 2392 | intel_encoder = &intel_dp->base; |
55f78c43 | 2393 | |
ea5b213a | 2394 | if (HAS_PCH_SPLIT(dev) && output_reg == PCH_DP_D) |
b329530c | 2395 | if (intel_dpd_is_edp(dev)) |
ea5b213a | 2396 | intel_dp->is_pch_edp = true; |
b329530c | 2397 | |
cfcb0fc9 | 2398 | if (output_reg == DP_A || is_pch_edp(intel_dp)) { |
b329530c AJ |
2399 | type = DRM_MODE_CONNECTOR_eDP; |
2400 | intel_encoder->type = INTEL_OUTPUT_EDP; | |
2401 | } else { | |
2402 | type = DRM_MODE_CONNECTOR_DisplayPort; | |
2403 | intel_encoder->type = INTEL_OUTPUT_DISPLAYPORT; | |
2404 | } | |
2405 | ||
55f78c43 | 2406 | connector = &intel_connector->base; |
b329530c | 2407 | drm_connector_init(dev, connector, &intel_dp_connector_funcs, type); |
a4fc5ed6 KP |
2408 | drm_connector_helper_add(connector, &intel_dp_connector_helper_funcs); |
2409 | ||
eb1f8e4f DA |
2410 | connector->polled = DRM_CONNECTOR_POLL_HPD; |
2411 | ||
652af9d7 | 2412 | if (output_reg == DP_B || output_reg == PCH_DP_B) |
21d40d37 | 2413 | intel_encoder->clone_mask = (1 << INTEL_DP_B_CLONE_BIT); |
652af9d7 | 2414 | else if (output_reg == DP_C || output_reg == PCH_DP_C) |
21d40d37 | 2415 | intel_encoder->clone_mask = (1 << INTEL_DP_C_CLONE_BIT); |
652af9d7 | 2416 | else if (output_reg == DP_D || output_reg == PCH_DP_D) |
21d40d37 | 2417 | intel_encoder->clone_mask = (1 << INTEL_DP_D_CLONE_BIT); |
f8aed700 | 2418 | |
bd943159 | 2419 | if (is_edp(intel_dp)) { |
21d40d37 | 2420 | intel_encoder->clone_mask = (1 << INTEL_EDP_CLONE_BIT); |
bd943159 KP |
2421 | INIT_DELAYED_WORK(&intel_dp->panel_vdd_work, |
2422 | ironlake_panel_vdd_work); | |
2423 | } | |
6251ec0a | 2424 | |
27f8227b | 2425 | intel_encoder->crtc_mask = (1 << 0) | (1 << 1) | (1 << 2); |
a4fc5ed6 KP |
2426 | connector->interlace_allowed = true; |
2427 | connector->doublescan_allowed = 0; | |
2428 | ||
4ef69c7a | 2429 | drm_encoder_init(dev, &intel_encoder->base, &intel_dp_enc_funcs, |
a4fc5ed6 | 2430 | DRM_MODE_ENCODER_TMDS); |
4ef69c7a | 2431 | drm_encoder_helper_add(&intel_encoder->base, &intel_dp_helper_funcs); |
a4fc5ed6 | 2432 | |
df0e9248 | 2433 | intel_connector_attach_encoder(intel_connector, intel_encoder); |
a4fc5ed6 KP |
2434 | drm_sysfs_connector_add(connector); |
2435 | ||
2436 | /* Set up the DDC bus. */ | |
5eb08b69 | 2437 | switch (output_reg) { |
32f9d658 ZW |
2438 | case DP_A: |
2439 | name = "DPDDC-A"; | |
2440 | break; | |
5eb08b69 ZW |
2441 | case DP_B: |
2442 | case PCH_DP_B: | |
b01f2c3a JB |
2443 | dev_priv->hotplug_supported_mask |= |
2444 | HDMIB_HOTPLUG_INT_STATUS; | |
5eb08b69 ZW |
2445 | name = "DPDDC-B"; |
2446 | break; | |
2447 | case DP_C: | |
2448 | case PCH_DP_C: | |
b01f2c3a JB |
2449 | dev_priv->hotplug_supported_mask |= |
2450 | HDMIC_HOTPLUG_INT_STATUS; | |
5eb08b69 ZW |
2451 | name = "DPDDC-C"; |
2452 | break; | |
2453 | case DP_D: | |
2454 | case PCH_DP_D: | |
b01f2c3a JB |
2455 | dev_priv->hotplug_supported_mask |= |
2456 | HDMID_HOTPLUG_INT_STATUS; | |
5eb08b69 ZW |
2457 | name = "DPDDC-D"; |
2458 | break; | |
2459 | } | |
2460 | ||
89667383 JB |
2461 | /* Cache some DPCD data in the eDP case */ |
2462 | if (is_edp(intel_dp)) { | |
59f3e272 | 2463 | bool ret; |
f01eca2e KP |
2464 | struct edp_power_seq cur, vbt; |
2465 | u32 pp_on, pp_off, pp_div; | |
5d613501 JB |
2466 | |
2467 | pp_on = I915_READ(PCH_PP_ON_DELAYS); | |
f01eca2e | 2468 | pp_off = I915_READ(PCH_PP_OFF_DELAYS); |
5d613501 | 2469 | pp_div = I915_READ(PCH_PP_DIVISOR); |
89667383 | 2470 | |
f01eca2e KP |
2471 | /* Pull timing values out of registers */ |
2472 | cur.t1_t3 = (pp_on & PANEL_POWER_UP_DELAY_MASK) >> | |
2473 | PANEL_POWER_UP_DELAY_SHIFT; | |
2474 | ||
2475 | cur.t8 = (pp_on & PANEL_LIGHT_ON_DELAY_MASK) >> | |
2476 | PANEL_LIGHT_ON_DELAY_SHIFT; | |
f2e8b18a | 2477 | |
f01eca2e KP |
2478 | cur.t9 = (pp_off & PANEL_LIGHT_OFF_DELAY_MASK) >> |
2479 | PANEL_LIGHT_OFF_DELAY_SHIFT; | |
2480 | ||
2481 | cur.t10 = (pp_off & PANEL_POWER_DOWN_DELAY_MASK) >> | |
2482 | PANEL_POWER_DOWN_DELAY_SHIFT; | |
2483 | ||
2484 | cur.t11_t12 = ((pp_div & PANEL_POWER_CYCLE_DELAY_MASK) >> | |
2485 | PANEL_POWER_CYCLE_DELAY_SHIFT) * 1000; | |
2486 | ||
2487 | DRM_DEBUG_KMS("cur t1_t3 %d t8 %d t9 %d t10 %d t11_t12 %d\n", | |
2488 | cur.t1_t3, cur.t8, cur.t9, cur.t10, cur.t11_t12); | |
2489 | ||
2490 | vbt = dev_priv->edp.pps; | |
2491 | ||
2492 | DRM_DEBUG_KMS("vbt t1_t3 %d t8 %d t9 %d t10 %d t11_t12 %d\n", | |
2493 | vbt.t1_t3, vbt.t8, vbt.t9, vbt.t10, vbt.t11_t12); | |
2494 | ||
2495 | #define get_delay(field) ((max(cur.field, vbt.field) + 9) / 10) | |
2496 | ||
2497 | intel_dp->panel_power_up_delay = get_delay(t1_t3); | |
2498 | intel_dp->backlight_on_delay = get_delay(t8); | |
2499 | intel_dp->backlight_off_delay = get_delay(t9); | |
2500 | intel_dp->panel_power_down_delay = get_delay(t10); | |
2501 | intel_dp->panel_power_cycle_delay = get_delay(t11_t12); | |
2502 | ||
2503 | DRM_DEBUG_KMS("panel power up delay %d, power down delay %d, power cycle delay %d\n", | |
2504 | intel_dp->panel_power_up_delay, intel_dp->panel_power_down_delay, | |
2505 | intel_dp->panel_power_cycle_delay); | |
2506 | ||
2507 | DRM_DEBUG_KMS("backlight on delay %d, off delay %d\n", | |
2508 | intel_dp->backlight_on_delay, intel_dp->backlight_off_delay); | |
5d613501 JB |
2509 | |
2510 | ironlake_edp_panel_vdd_on(intel_dp); | |
59f3e272 | 2511 | ret = intel_dp_get_dpcd(intel_dp); |
bd943159 | 2512 | ironlake_edp_panel_vdd_off(intel_dp, false); |
99ea7127 | 2513 | |
59f3e272 | 2514 | if (ret) { |
7183dc29 JB |
2515 | if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11) |
2516 | dev_priv->no_aux_handshake = | |
2517 | intel_dp->dpcd[DP_MAX_DOWNSPREAD] & | |
89667383 JB |
2518 | DP_NO_AUX_HANDSHAKE_LINK_TRAINING; |
2519 | } else { | |
3d3dc149 | 2520 | /* if this fails, presume the device is a ghost */ |
48898b03 | 2521 | DRM_INFO("failed to retrieve link info, disabling eDP\n"); |
3d3dc149 | 2522 | intel_dp_encoder_destroy(&intel_dp->base.base); |
48898b03 | 2523 | intel_dp_destroy(&intel_connector->base); |
3d3dc149 | 2524 | return; |
89667383 | 2525 | } |
89667383 JB |
2526 | } |
2527 | ||
552fb0b7 KP |
2528 | intel_dp_i2c_init(intel_dp, intel_connector, name); |
2529 | ||
21d40d37 | 2530 | intel_encoder->hot_plug = intel_dp_hot_plug; |
a4fc5ed6 | 2531 | |
4d926461 | 2532 | if (is_edp(intel_dp)) { |
aaa6fd2a MG |
2533 | dev_priv->int_edp_connector = connector; |
2534 | intel_panel_setup_backlight(dev); | |
32f9d658 ZW |
2535 | } |
2536 | ||
f684960e CW |
2537 | intel_dp_add_properties(intel_dp, connector); |
2538 | ||
a4fc5ed6 KP |
2539 | /* For G4X desktop chip, PEG_BAND_GAP_DATA 3:0 must first be written |
2540 | * 0xd. Failure to do so will result in spurious interrupts being | |
2541 | * generated on the port when a cable is not attached. | |
2542 | */ | |
2543 | if (IS_G4X(dev) && !IS_GM45(dev)) { | |
2544 | u32 temp = I915_READ(PEG_BAND_GAP_DATA); | |
2545 | I915_WRITE(PEG_BAND_GAP_DATA, (temp & ~0xf) | 0xd); | |
2546 | } | |
2547 | } |