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a4fc5ed6 KP |
1 | /* |
2 | * Copyright © 2008 Intel Corporation | |
3 | * | |
4 | * Permission is hereby granted, free of charge, to any person obtaining a | |
5 | * copy of this software and associated documentation files (the "Software"), | |
6 | * to deal in the Software without restriction, including without limitation | |
7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
8 | * and/or sell copies of the Software, and to permit persons to whom the | |
9 | * Software is furnished to do so, subject to the following conditions: | |
10 | * | |
11 | * The above copyright notice and this permission notice (including the next | |
12 | * paragraph) shall be included in all copies or substantial portions of the | |
13 | * Software. | |
14 | * | |
15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
18 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING | |
20 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS | |
21 | * IN THE SOFTWARE. | |
22 | * | |
23 | * Authors: | |
24 | * Keith Packard <keithp@keithp.com> | |
25 | * | |
26 | */ | |
27 | ||
28 | #include <linux/i2c.h> | |
5a0e3ad6 | 29 | #include <linux/slab.h> |
2d1a8a48 | 30 | #include <linux/export.h> |
760285e7 DH |
31 | #include <drm/drmP.h> |
32 | #include <drm/drm_crtc.h> | |
33 | #include <drm/drm_crtc_helper.h> | |
34 | #include <drm/drm_edid.h> | |
a4fc5ed6 | 35 | #include "intel_drv.h" |
760285e7 | 36 | #include <drm/i915_drm.h> |
a4fc5ed6 | 37 | #include "i915_drv.h" |
a4fc5ed6 | 38 | |
a4fc5ed6 KP |
39 | #define DP_LINK_CHECK_TIMEOUT (10 * 1000) |
40 | ||
cfcb0fc9 JB |
41 | /** |
42 | * is_edp - is the given port attached to an eDP panel (either CPU or PCH) | |
43 | * @intel_dp: DP struct | |
44 | * | |
45 | * If a CPU or PCH DP output is attached to an eDP panel, this function | |
46 | * will return true, and false otherwise. | |
47 | */ | |
48 | static bool is_edp(struct intel_dp *intel_dp) | |
49 | { | |
da63a9f2 PZ |
50 | struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp); |
51 | ||
52 | return intel_dig_port->base.type == INTEL_OUTPUT_EDP; | |
cfcb0fc9 JB |
53 | } |
54 | ||
68b4d824 ID |
55 | static struct drm_device *intel_dp_to_dev(struct intel_dp *intel_dp) |
56 | { | |
57 | struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp); | |
58 | ||
59 | return intel_dig_port->base.base.dev; | |
60 | } | |
61 | ||
df0e9248 CW |
62 | static struct intel_dp *intel_attached_dp(struct drm_connector *connector) |
63 | { | |
fa90ecef | 64 | return enc_to_intel_dp(&intel_attached_encoder(connector)->base); |
df0e9248 CW |
65 | } |
66 | ||
ea5b213a | 67 | static void intel_dp_link_down(struct intel_dp *intel_dp); |
a4fc5ed6 | 68 | |
a4fc5ed6 | 69 | static int |
ea5b213a | 70 | intel_dp_max_link_bw(struct intel_dp *intel_dp) |
a4fc5ed6 | 71 | { |
7183dc29 | 72 | int max_link_bw = intel_dp->dpcd[DP_MAX_LINK_RATE]; |
a4fc5ed6 KP |
73 | |
74 | switch (max_link_bw) { | |
75 | case DP_LINK_BW_1_62: | |
76 | case DP_LINK_BW_2_7: | |
77 | break; | |
78 | default: | |
79 | max_link_bw = DP_LINK_BW_1_62; | |
80 | break; | |
81 | } | |
82 | return max_link_bw; | |
83 | } | |
84 | ||
cd9dde44 AJ |
85 | /* |
86 | * The units on the numbers in the next two are... bizarre. Examples will | |
87 | * make it clearer; this one parallels an example in the eDP spec. | |
88 | * | |
89 | * intel_dp_max_data_rate for one lane of 2.7GHz evaluates as: | |
90 | * | |
91 | * 270000 * 1 * 8 / 10 == 216000 | |
92 | * | |
93 | * The actual data capacity of that configuration is 2.16Gbit/s, so the | |
94 | * units are decakilobits. ->clock in a drm_display_mode is in kilohertz - | |
95 | * or equivalently, kilopixels per second - so for 1680x1050R it'd be | |
96 | * 119000. At 18bpp that's 2142000 kilobits per second. | |
97 | * | |
98 | * Thus the strange-looking division by 10 in intel_dp_link_required, to | |
99 | * get the result in decakilobits instead of kilobits. | |
100 | */ | |
101 | ||
a4fc5ed6 | 102 | static int |
c898261c | 103 | intel_dp_link_required(int pixel_clock, int bpp) |
a4fc5ed6 | 104 | { |
cd9dde44 | 105 | return (pixel_clock * bpp + 9) / 10; |
a4fc5ed6 KP |
106 | } |
107 | ||
fe27d53e DA |
108 | static int |
109 | intel_dp_max_data_rate(int max_link_clock, int max_lanes) | |
110 | { | |
111 | return (max_link_clock * max_lanes * 8) / 10; | |
112 | } | |
113 | ||
a4fc5ed6 KP |
114 | static int |
115 | intel_dp_mode_valid(struct drm_connector *connector, | |
116 | struct drm_display_mode *mode) | |
117 | { | |
df0e9248 | 118 | struct intel_dp *intel_dp = intel_attached_dp(connector); |
dd06f90e JN |
119 | struct intel_connector *intel_connector = to_intel_connector(connector); |
120 | struct drm_display_mode *fixed_mode = intel_connector->panel.fixed_mode; | |
36008365 DV |
121 | int target_clock = mode->clock; |
122 | int max_rate, mode_rate, max_lanes, max_link_clock; | |
a4fc5ed6 | 123 | |
dd06f90e JN |
124 | if (is_edp(intel_dp) && fixed_mode) { |
125 | if (mode->hdisplay > fixed_mode->hdisplay) | |
7de56f43 ZY |
126 | return MODE_PANEL; |
127 | ||
dd06f90e | 128 | if (mode->vdisplay > fixed_mode->vdisplay) |
7de56f43 | 129 | return MODE_PANEL; |
03afc4a2 DV |
130 | |
131 | target_clock = fixed_mode->clock; | |
7de56f43 ZY |
132 | } |
133 | ||
36008365 DV |
134 | max_link_clock = drm_dp_bw_code_to_link_rate(intel_dp_max_link_bw(intel_dp)); |
135 | max_lanes = drm_dp_max_lane_count(intel_dp->dpcd); | |
136 | ||
137 | max_rate = intel_dp_max_data_rate(max_link_clock, max_lanes); | |
138 | mode_rate = intel_dp_link_required(target_clock, 18); | |
139 | ||
140 | if (mode_rate > max_rate) | |
c4867936 | 141 | return MODE_CLOCK_HIGH; |
a4fc5ed6 KP |
142 | |
143 | if (mode->clock < 10000) | |
144 | return MODE_CLOCK_LOW; | |
145 | ||
0af78a2b DV |
146 | if (mode->flags & DRM_MODE_FLAG_DBLCLK) |
147 | return MODE_H_ILLEGAL; | |
148 | ||
a4fc5ed6 KP |
149 | return MODE_OK; |
150 | } | |
151 | ||
152 | static uint32_t | |
153 | pack_aux(uint8_t *src, int src_bytes) | |
154 | { | |
155 | int i; | |
156 | uint32_t v = 0; | |
157 | ||
158 | if (src_bytes > 4) | |
159 | src_bytes = 4; | |
160 | for (i = 0; i < src_bytes; i++) | |
161 | v |= ((uint32_t) src[i]) << ((3-i) * 8); | |
162 | return v; | |
163 | } | |
164 | ||
165 | static void | |
166 | unpack_aux(uint32_t src, uint8_t *dst, int dst_bytes) | |
167 | { | |
168 | int i; | |
169 | if (dst_bytes > 4) | |
170 | dst_bytes = 4; | |
171 | for (i = 0; i < dst_bytes; i++) | |
172 | dst[i] = src >> ((3-i) * 8); | |
173 | } | |
174 | ||
fb0f8fbf KP |
175 | /* hrawclock is 1/4 the FSB frequency */ |
176 | static int | |
177 | intel_hrawclk(struct drm_device *dev) | |
178 | { | |
179 | struct drm_i915_private *dev_priv = dev->dev_private; | |
180 | uint32_t clkcfg; | |
181 | ||
9473c8f4 VP |
182 | /* There is no CLKCFG reg in Valleyview. VLV hrawclk is 200 MHz */ |
183 | if (IS_VALLEYVIEW(dev)) | |
184 | return 200; | |
185 | ||
fb0f8fbf KP |
186 | clkcfg = I915_READ(CLKCFG); |
187 | switch (clkcfg & CLKCFG_FSB_MASK) { | |
188 | case CLKCFG_FSB_400: | |
189 | return 100; | |
190 | case CLKCFG_FSB_533: | |
191 | return 133; | |
192 | case CLKCFG_FSB_667: | |
193 | return 166; | |
194 | case CLKCFG_FSB_800: | |
195 | return 200; | |
196 | case CLKCFG_FSB_1067: | |
197 | return 266; | |
198 | case CLKCFG_FSB_1333: | |
199 | return 333; | |
200 | /* these two are just a guess; one of them might be right */ | |
201 | case CLKCFG_FSB_1600: | |
202 | case CLKCFG_FSB_1600_ALT: | |
203 | return 400; | |
204 | default: | |
205 | return 133; | |
206 | } | |
207 | } | |
208 | ||
ebf33b18 KP |
209 | static bool ironlake_edp_have_panel_power(struct intel_dp *intel_dp) |
210 | { | |
30add22d | 211 | struct drm_device *dev = intel_dp_to_dev(intel_dp); |
ebf33b18 | 212 | struct drm_i915_private *dev_priv = dev->dev_private; |
453c5420 | 213 | u32 pp_stat_reg; |
ebf33b18 | 214 | |
453c5420 JB |
215 | pp_stat_reg = IS_VALLEYVIEW(dev) ? PIPEA_PP_STATUS : PCH_PP_STATUS; |
216 | return (I915_READ(pp_stat_reg) & PP_ON) != 0; | |
ebf33b18 KP |
217 | } |
218 | ||
219 | static bool ironlake_edp_have_panel_vdd(struct intel_dp *intel_dp) | |
220 | { | |
30add22d | 221 | struct drm_device *dev = intel_dp_to_dev(intel_dp); |
ebf33b18 | 222 | struct drm_i915_private *dev_priv = dev->dev_private; |
453c5420 | 223 | u32 pp_ctrl_reg; |
ebf33b18 | 224 | |
453c5420 JB |
225 | pp_ctrl_reg = IS_VALLEYVIEW(dev) ? PIPEA_PP_CONTROL : PCH_PP_CONTROL; |
226 | return (I915_READ(pp_ctrl_reg) & EDP_FORCE_VDD) != 0; | |
ebf33b18 KP |
227 | } |
228 | ||
9b984dae KP |
229 | static void |
230 | intel_dp_check_edp(struct intel_dp *intel_dp) | |
231 | { | |
30add22d | 232 | struct drm_device *dev = intel_dp_to_dev(intel_dp); |
9b984dae | 233 | struct drm_i915_private *dev_priv = dev->dev_private; |
453c5420 | 234 | u32 pp_stat_reg, pp_ctrl_reg; |
ebf33b18 | 235 | |
9b984dae KP |
236 | if (!is_edp(intel_dp)) |
237 | return; | |
453c5420 JB |
238 | |
239 | pp_stat_reg = IS_VALLEYVIEW(dev) ? PIPEA_PP_STATUS : PCH_PP_STATUS; | |
240 | pp_ctrl_reg = IS_VALLEYVIEW(dev) ? PIPEA_PP_CONTROL : PCH_PP_CONTROL; | |
241 | ||
ebf33b18 | 242 | if (!ironlake_edp_have_panel_power(intel_dp) && !ironlake_edp_have_panel_vdd(intel_dp)) { |
9b984dae KP |
243 | WARN(1, "eDP powered off while attempting aux channel communication.\n"); |
244 | DRM_DEBUG_KMS("Status 0x%08x Control 0x%08x\n", | |
453c5420 JB |
245 | I915_READ(pp_stat_reg), |
246 | I915_READ(pp_ctrl_reg)); | |
9b984dae KP |
247 | } |
248 | } | |
249 | ||
9ee32fea DV |
250 | static uint32_t |
251 | intel_dp_aux_wait_done(struct intel_dp *intel_dp, bool has_aux_irq) | |
252 | { | |
253 | struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp); | |
254 | struct drm_device *dev = intel_dig_port->base.base.dev; | |
255 | struct drm_i915_private *dev_priv = dev->dev_private; | |
9ed35ab1 | 256 | uint32_t ch_ctl = intel_dp->aux_ch_ctl_reg; |
9ee32fea DV |
257 | uint32_t status; |
258 | bool done; | |
259 | ||
ef04f00d | 260 | #define C (((status = I915_READ_NOTRACE(ch_ctl)) & DP_AUX_CH_CTL_SEND_BUSY) == 0) |
9ee32fea | 261 | if (has_aux_irq) |
b90f5176 PZ |
262 | done = wait_event_timeout(dev_priv->gmbus_wait_queue, C, |
263 | msecs_to_jiffies(10)); | |
9ee32fea DV |
264 | else |
265 | done = wait_for_atomic(C, 10) == 0; | |
266 | if (!done) | |
267 | DRM_ERROR("dp aux hw did not signal timeout (has irq: %i)!\n", | |
268 | has_aux_irq); | |
269 | #undef C | |
270 | ||
271 | return status; | |
272 | } | |
273 | ||
a4fc5ed6 | 274 | static int |
ea5b213a | 275 | intel_dp_aux_ch(struct intel_dp *intel_dp, |
a4fc5ed6 KP |
276 | uint8_t *send, int send_bytes, |
277 | uint8_t *recv, int recv_size) | |
278 | { | |
174edf1f PZ |
279 | struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp); |
280 | struct drm_device *dev = intel_dig_port->base.base.dev; | |
a4fc5ed6 | 281 | struct drm_i915_private *dev_priv = dev->dev_private; |
9ed35ab1 | 282 | uint32_t ch_ctl = intel_dp->aux_ch_ctl_reg; |
a4fc5ed6 | 283 | uint32_t ch_data = ch_ctl + 4; |
9ee32fea | 284 | int i, ret, recv_bytes; |
a4fc5ed6 | 285 | uint32_t status; |
fb0f8fbf | 286 | uint32_t aux_clock_divider; |
6b4e0a93 | 287 | int try, precharge; |
9ee32fea DV |
288 | bool has_aux_irq = INTEL_INFO(dev)->gen >= 5 && !IS_VALLEYVIEW(dev); |
289 | ||
290 | /* dp aux is extremely sensitive to irq latency, hence request the | |
291 | * lowest possible wakeup latency and so prevent the cpu from going into | |
292 | * deep sleep states. | |
293 | */ | |
294 | pm_qos_update_request(&dev_priv->pm_qos, 0); | |
a4fc5ed6 | 295 | |
9b984dae | 296 | intel_dp_check_edp(intel_dp); |
a4fc5ed6 | 297 | /* The clock divider is based off the hrawclk, |
fb0f8fbf KP |
298 | * and would like to run at 2MHz. So, take the |
299 | * hrawclk value and divide by 2 and use that | |
6176b8f9 JB |
300 | * |
301 | * Note that PCH attached eDP panels should use a 125MHz input | |
302 | * clock divider. | |
a4fc5ed6 | 303 | */ |
a62d0834 ID |
304 | if (IS_VALLEYVIEW(dev)) { |
305 | aux_clock_divider = 100; | |
306 | } else if (intel_dig_port->port == PORT_A) { | |
affa9354 | 307 | if (HAS_DDI(dev)) |
b2b877ff PZ |
308 | aux_clock_divider = DIV_ROUND_CLOSEST( |
309 | intel_ddi_get_cdclk_freq(dev_priv), 2000); | |
9473c8f4 | 310 | else if (IS_GEN6(dev) || IS_GEN7(dev)) |
1a2eb460 | 311 | aux_clock_divider = 200; /* SNB & IVB eDP input clock at 400Mhz */ |
e3421a18 ZW |
312 | else |
313 | aux_clock_divider = 225; /* eDP input clock at 450Mhz */ | |
2c55c336 JN |
314 | } else if (dev_priv->pch_id == INTEL_PCH_LPT_DEVICE_ID_TYPE) { |
315 | /* Workaround for non-ULT HSW */ | |
316 | aux_clock_divider = 74; | |
317 | } else if (HAS_PCH_SPLIT(dev)) { | |
6b3ec1c9 | 318 | aux_clock_divider = DIV_ROUND_UP(intel_pch_rawclk(dev), 2); |
2c55c336 | 319 | } else { |
5eb08b69 | 320 | aux_clock_divider = intel_hrawclk(dev) / 2; |
2c55c336 | 321 | } |
5eb08b69 | 322 | |
6b4e0a93 DV |
323 | if (IS_GEN6(dev)) |
324 | precharge = 3; | |
325 | else | |
326 | precharge = 5; | |
327 | ||
11bee43e JB |
328 | /* Try to wait for any previous AUX channel activity */ |
329 | for (try = 0; try < 3; try++) { | |
ef04f00d | 330 | status = I915_READ_NOTRACE(ch_ctl); |
11bee43e JB |
331 | if ((status & DP_AUX_CH_CTL_SEND_BUSY) == 0) |
332 | break; | |
333 | msleep(1); | |
334 | } | |
335 | ||
336 | if (try == 3) { | |
337 | WARN(1, "dp_aux_ch not started status 0x%08x\n", | |
338 | I915_READ(ch_ctl)); | |
9ee32fea DV |
339 | ret = -EBUSY; |
340 | goto out; | |
4f7f7b7e CW |
341 | } |
342 | ||
fb0f8fbf KP |
343 | /* Must try at least 3 times according to DP spec */ |
344 | for (try = 0; try < 5; try++) { | |
345 | /* Load the send data into the aux channel data registers */ | |
4f7f7b7e CW |
346 | for (i = 0; i < send_bytes; i += 4) |
347 | I915_WRITE(ch_data + i, | |
348 | pack_aux(send + i, send_bytes - i)); | |
0206e353 | 349 | |
fb0f8fbf | 350 | /* Send the command and wait for it to complete */ |
4f7f7b7e CW |
351 | I915_WRITE(ch_ctl, |
352 | DP_AUX_CH_CTL_SEND_BUSY | | |
9ee32fea | 353 | (has_aux_irq ? DP_AUX_CH_CTL_INTERRUPT : 0) | |
4f7f7b7e CW |
354 | DP_AUX_CH_CTL_TIME_OUT_400us | |
355 | (send_bytes << DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT) | | |
356 | (precharge << DP_AUX_CH_CTL_PRECHARGE_2US_SHIFT) | | |
357 | (aux_clock_divider << DP_AUX_CH_CTL_BIT_CLOCK_2X_SHIFT) | | |
358 | DP_AUX_CH_CTL_DONE | | |
359 | DP_AUX_CH_CTL_TIME_OUT_ERROR | | |
360 | DP_AUX_CH_CTL_RECEIVE_ERROR); | |
9ee32fea DV |
361 | |
362 | status = intel_dp_aux_wait_done(intel_dp, has_aux_irq); | |
0206e353 | 363 | |
fb0f8fbf | 364 | /* Clear done status and any errors */ |
4f7f7b7e CW |
365 | I915_WRITE(ch_ctl, |
366 | status | | |
367 | DP_AUX_CH_CTL_DONE | | |
368 | DP_AUX_CH_CTL_TIME_OUT_ERROR | | |
369 | DP_AUX_CH_CTL_RECEIVE_ERROR); | |
d7e96fea AJ |
370 | |
371 | if (status & (DP_AUX_CH_CTL_TIME_OUT_ERROR | | |
372 | DP_AUX_CH_CTL_RECEIVE_ERROR)) | |
373 | continue; | |
4f7f7b7e | 374 | if (status & DP_AUX_CH_CTL_DONE) |
a4fc5ed6 KP |
375 | break; |
376 | } | |
377 | ||
a4fc5ed6 | 378 | if ((status & DP_AUX_CH_CTL_DONE) == 0) { |
1ae8c0a5 | 379 | DRM_ERROR("dp_aux_ch not done status 0x%08x\n", status); |
9ee32fea DV |
380 | ret = -EBUSY; |
381 | goto out; | |
a4fc5ed6 KP |
382 | } |
383 | ||
384 | /* Check for timeout or receive error. | |
385 | * Timeouts occur when the sink is not connected | |
386 | */ | |
a5b3da54 | 387 | if (status & DP_AUX_CH_CTL_RECEIVE_ERROR) { |
1ae8c0a5 | 388 | DRM_ERROR("dp_aux_ch receive error status 0x%08x\n", status); |
9ee32fea DV |
389 | ret = -EIO; |
390 | goto out; | |
a5b3da54 | 391 | } |
1ae8c0a5 KP |
392 | |
393 | /* Timeouts occur when the device isn't connected, so they're | |
394 | * "normal" -- don't fill the kernel log with these */ | |
a5b3da54 | 395 | if (status & DP_AUX_CH_CTL_TIME_OUT_ERROR) { |
28c97730 | 396 | DRM_DEBUG_KMS("dp_aux_ch timeout status 0x%08x\n", status); |
9ee32fea DV |
397 | ret = -ETIMEDOUT; |
398 | goto out; | |
a4fc5ed6 KP |
399 | } |
400 | ||
401 | /* Unload any bytes sent back from the other side */ | |
402 | recv_bytes = ((status & DP_AUX_CH_CTL_MESSAGE_SIZE_MASK) >> | |
403 | DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT); | |
a4fc5ed6 KP |
404 | if (recv_bytes > recv_size) |
405 | recv_bytes = recv_size; | |
0206e353 | 406 | |
4f7f7b7e CW |
407 | for (i = 0; i < recv_bytes; i += 4) |
408 | unpack_aux(I915_READ(ch_data + i), | |
409 | recv + i, recv_bytes - i); | |
a4fc5ed6 | 410 | |
9ee32fea DV |
411 | ret = recv_bytes; |
412 | out: | |
413 | pm_qos_update_request(&dev_priv->pm_qos, PM_QOS_DEFAULT_VALUE); | |
414 | ||
415 | return ret; | |
a4fc5ed6 KP |
416 | } |
417 | ||
418 | /* Write data to the aux channel in native mode */ | |
419 | static int | |
ea5b213a | 420 | intel_dp_aux_native_write(struct intel_dp *intel_dp, |
a4fc5ed6 KP |
421 | uint16_t address, uint8_t *send, int send_bytes) |
422 | { | |
423 | int ret; | |
424 | uint8_t msg[20]; | |
425 | int msg_bytes; | |
426 | uint8_t ack; | |
427 | ||
9b984dae | 428 | intel_dp_check_edp(intel_dp); |
a4fc5ed6 KP |
429 | if (send_bytes > 16) |
430 | return -1; | |
431 | msg[0] = AUX_NATIVE_WRITE << 4; | |
432 | msg[1] = address >> 8; | |
eebc863e | 433 | msg[2] = address & 0xff; |
a4fc5ed6 KP |
434 | msg[3] = send_bytes - 1; |
435 | memcpy(&msg[4], send, send_bytes); | |
436 | msg_bytes = send_bytes + 4; | |
437 | for (;;) { | |
ea5b213a | 438 | ret = intel_dp_aux_ch(intel_dp, msg, msg_bytes, &ack, 1); |
a4fc5ed6 KP |
439 | if (ret < 0) |
440 | return ret; | |
441 | if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_ACK) | |
442 | break; | |
443 | else if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_DEFER) | |
444 | udelay(100); | |
445 | else | |
a5b3da54 | 446 | return -EIO; |
a4fc5ed6 KP |
447 | } |
448 | return send_bytes; | |
449 | } | |
450 | ||
451 | /* Write a single byte to the aux channel in native mode */ | |
452 | static int | |
ea5b213a | 453 | intel_dp_aux_native_write_1(struct intel_dp *intel_dp, |
a4fc5ed6 KP |
454 | uint16_t address, uint8_t byte) |
455 | { | |
ea5b213a | 456 | return intel_dp_aux_native_write(intel_dp, address, &byte, 1); |
a4fc5ed6 KP |
457 | } |
458 | ||
459 | /* read bytes from a native aux channel */ | |
460 | static int | |
ea5b213a | 461 | intel_dp_aux_native_read(struct intel_dp *intel_dp, |
a4fc5ed6 KP |
462 | uint16_t address, uint8_t *recv, int recv_bytes) |
463 | { | |
464 | uint8_t msg[4]; | |
465 | int msg_bytes; | |
466 | uint8_t reply[20]; | |
467 | int reply_bytes; | |
468 | uint8_t ack; | |
469 | int ret; | |
470 | ||
9b984dae | 471 | intel_dp_check_edp(intel_dp); |
a4fc5ed6 KP |
472 | msg[0] = AUX_NATIVE_READ << 4; |
473 | msg[1] = address >> 8; | |
474 | msg[2] = address & 0xff; | |
475 | msg[3] = recv_bytes - 1; | |
476 | ||
477 | msg_bytes = 4; | |
478 | reply_bytes = recv_bytes + 1; | |
479 | ||
480 | for (;;) { | |
ea5b213a | 481 | ret = intel_dp_aux_ch(intel_dp, msg, msg_bytes, |
a4fc5ed6 | 482 | reply, reply_bytes); |
a5b3da54 KP |
483 | if (ret == 0) |
484 | return -EPROTO; | |
485 | if (ret < 0) | |
a4fc5ed6 KP |
486 | return ret; |
487 | ack = reply[0]; | |
488 | if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_ACK) { | |
489 | memcpy(recv, reply + 1, ret - 1); | |
490 | return ret - 1; | |
491 | } | |
492 | else if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_DEFER) | |
493 | udelay(100); | |
494 | else | |
a5b3da54 | 495 | return -EIO; |
a4fc5ed6 KP |
496 | } |
497 | } | |
498 | ||
499 | static int | |
ab2c0672 DA |
500 | intel_dp_i2c_aux_ch(struct i2c_adapter *adapter, int mode, |
501 | uint8_t write_byte, uint8_t *read_byte) | |
a4fc5ed6 | 502 | { |
ab2c0672 | 503 | struct i2c_algo_dp_aux_data *algo_data = adapter->algo_data; |
ea5b213a CW |
504 | struct intel_dp *intel_dp = container_of(adapter, |
505 | struct intel_dp, | |
506 | adapter); | |
ab2c0672 DA |
507 | uint16_t address = algo_data->address; |
508 | uint8_t msg[5]; | |
509 | uint8_t reply[2]; | |
8316f337 | 510 | unsigned retry; |
ab2c0672 DA |
511 | int msg_bytes; |
512 | int reply_bytes; | |
513 | int ret; | |
514 | ||
9b984dae | 515 | intel_dp_check_edp(intel_dp); |
ab2c0672 DA |
516 | /* Set up the command byte */ |
517 | if (mode & MODE_I2C_READ) | |
518 | msg[0] = AUX_I2C_READ << 4; | |
519 | else | |
520 | msg[0] = AUX_I2C_WRITE << 4; | |
521 | ||
522 | if (!(mode & MODE_I2C_STOP)) | |
523 | msg[0] |= AUX_I2C_MOT << 4; | |
a4fc5ed6 | 524 | |
ab2c0672 DA |
525 | msg[1] = address >> 8; |
526 | msg[2] = address; | |
527 | ||
528 | switch (mode) { | |
529 | case MODE_I2C_WRITE: | |
530 | msg[3] = 0; | |
531 | msg[4] = write_byte; | |
532 | msg_bytes = 5; | |
533 | reply_bytes = 1; | |
534 | break; | |
535 | case MODE_I2C_READ: | |
536 | msg[3] = 0; | |
537 | msg_bytes = 4; | |
538 | reply_bytes = 2; | |
539 | break; | |
540 | default: | |
541 | msg_bytes = 3; | |
542 | reply_bytes = 1; | |
543 | break; | |
544 | } | |
545 | ||
8316f337 DF |
546 | for (retry = 0; retry < 5; retry++) { |
547 | ret = intel_dp_aux_ch(intel_dp, | |
548 | msg, msg_bytes, | |
549 | reply, reply_bytes); | |
ab2c0672 | 550 | if (ret < 0) { |
3ff99164 | 551 | DRM_DEBUG_KMS("aux_ch failed %d\n", ret); |
ab2c0672 DA |
552 | return ret; |
553 | } | |
8316f337 DF |
554 | |
555 | switch (reply[0] & AUX_NATIVE_REPLY_MASK) { | |
556 | case AUX_NATIVE_REPLY_ACK: | |
557 | /* I2C-over-AUX Reply field is only valid | |
558 | * when paired with AUX ACK. | |
559 | */ | |
560 | break; | |
561 | case AUX_NATIVE_REPLY_NACK: | |
562 | DRM_DEBUG_KMS("aux_ch native nack\n"); | |
563 | return -EREMOTEIO; | |
564 | case AUX_NATIVE_REPLY_DEFER: | |
565 | udelay(100); | |
566 | continue; | |
567 | default: | |
568 | DRM_ERROR("aux_ch invalid native reply 0x%02x\n", | |
569 | reply[0]); | |
570 | return -EREMOTEIO; | |
571 | } | |
572 | ||
ab2c0672 DA |
573 | switch (reply[0] & AUX_I2C_REPLY_MASK) { |
574 | case AUX_I2C_REPLY_ACK: | |
575 | if (mode == MODE_I2C_READ) { | |
576 | *read_byte = reply[1]; | |
577 | } | |
578 | return reply_bytes - 1; | |
579 | case AUX_I2C_REPLY_NACK: | |
8316f337 | 580 | DRM_DEBUG_KMS("aux_i2c nack\n"); |
ab2c0672 DA |
581 | return -EREMOTEIO; |
582 | case AUX_I2C_REPLY_DEFER: | |
8316f337 | 583 | DRM_DEBUG_KMS("aux_i2c defer\n"); |
ab2c0672 DA |
584 | udelay(100); |
585 | break; | |
586 | default: | |
8316f337 | 587 | DRM_ERROR("aux_i2c invalid reply 0x%02x\n", reply[0]); |
ab2c0672 DA |
588 | return -EREMOTEIO; |
589 | } | |
590 | } | |
8316f337 DF |
591 | |
592 | DRM_ERROR("too many retries, giving up\n"); | |
593 | return -EREMOTEIO; | |
a4fc5ed6 KP |
594 | } |
595 | ||
596 | static int | |
ea5b213a | 597 | intel_dp_i2c_init(struct intel_dp *intel_dp, |
55f78c43 | 598 | struct intel_connector *intel_connector, const char *name) |
a4fc5ed6 | 599 | { |
0b5c541b KP |
600 | int ret; |
601 | ||
d54e9d28 | 602 | DRM_DEBUG_KMS("i2c_init %s\n", name); |
ea5b213a CW |
603 | intel_dp->algo.running = false; |
604 | intel_dp->algo.address = 0; | |
605 | intel_dp->algo.aux_ch = intel_dp_i2c_aux_ch; | |
606 | ||
0206e353 | 607 | memset(&intel_dp->adapter, '\0', sizeof(intel_dp->adapter)); |
ea5b213a CW |
608 | intel_dp->adapter.owner = THIS_MODULE; |
609 | intel_dp->adapter.class = I2C_CLASS_DDC; | |
0206e353 | 610 | strncpy(intel_dp->adapter.name, name, sizeof(intel_dp->adapter.name) - 1); |
ea5b213a CW |
611 | intel_dp->adapter.name[sizeof(intel_dp->adapter.name) - 1] = '\0'; |
612 | intel_dp->adapter.algo_data = &intel_dp->algo; | |
613 | intel_dp->adapter.dev.parent = &intel_connector->base.kdev; | |
614 | ||
0b5c541b KP |
615 | ironlake_edp_panel_vdd_on(intel_dp); |
616 | ret = i2c_dp_aux_add_bus(&intel_dp->adapter); | |
bd943159 | 617 | ironlake_edp_panel_vdd_off(intel_dp, false); |
0b5c541b | 618 | return ret; |
a4fc5ed6 KP |
619 | } |
620 | ||
c6bb3538 DV |
621 | static void |
622 | intel_dp_set_clock(struct intel_encoder *encoder, | |
623 | struct intel_crtc_config *pipe_config, int link_bw) | |
624 | { | |
625 | struct drm_device *dev = encoder->base.dev; | |
626 | ||
627 | if (IS_G4X(dev)) { | |
628 | if (link_bw == DP_LINK_BW_1_62) { | |
629 | pipe_config->dpll.p1 = 2; | |
630 | pipe_config->dpll.p2 = 10; | |
631 | pipe_config->dpll.n = 2; | |
632 | pipe_config->dpll.m1 = 23; | |
633 | pipe_config->dpll.m2 = 8; | |
634 | } else { | |
635 | pipe_config->dpll.p1 = 1; | |
636 | pipe_config->dpll.p2 = 10; | |
637 | pipe_config->dpll.n = 1; | |
638 | pipe_config->dpll.m1 = 14; | |
639 | pipe_config->dpll.m2 = 2; | |
640 | } | |
641 | pipe_config->clock_set = true; | |
642 | } else if (IS_HASWELL(dev)) { | |
643 | /* Haswell has special-purpose DP DDI clocks. */ | |
644 | } else if (HAS_PCH_SPLIT(dev)) { | |
645 | if (link_bw == DP_LINK_BW_1_62) { | |
646 | pipe_config->dpll.n = 1; | |
647 | pipe_config->dpll.p1 = 2; | |
648 | pipe_config->dpll.p2 = 10; | |
649 | pipe_config->dpll.m1 = 12; | |
650 | pipe_config->dpll.m2 = 9; | |
651 | } else { | |
652 | pipe_config->dpll.n = 2; | |
653 | pipe_config->dpll.p1 = 1; | |
654 | pipe_config->dpll.p2 = 10; | |
655 | pipe_config->dpll.m1 = 14; | |
656 | pipe_config->dpll.m2 = 8; | |
657 | } | |
658 | pipe_config->clock_set = true; | |
659 | } else if (IS_VALLEYVIEW(dev)) { | |
660 | /* FIXME: Need to figure out optimized DP clocks for vlv. */ | |
661 | } | |
662 | } | |
663 | ||
00c09d70 | 664 | bool |
5bfe2ac0 DV |
665 | intel_dp_compute_config(struct intel_encoder *encoder, |
666 | struct intel_crtc_config *pipe_config) | |
a4fc5ed6 | 667 | { |
5bfe2ac0 | 668 | struct drm_device *dev = encoder->base.dev; |
36008365 | 669 | struct drm_i915_private *dev_priv = dev->dev_private; |
5bfe2ac0 | 670 | struct drm_display_mode *adjusted_mode = &pipe_config->adjusted_mode; |
5bfe2ac0 | 671 | struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base); |
bc7d38a4 | 672 | enum port port = dp_to_dig_port(intel_dp)->port; |
2dd24552 | 673 | struct intel_crtc *intel_crtc = encoder->new_crtc; |
dd06f90e | 674 | struct intel_connector *intel_connector = intel_dp->attached_connector; |
a4fc5ed6 | 675 | int lane_count, clock; |
397fe157 | 676 | int max_lane_count = drm_dp_max_lane_count(intel_dp->dpcd); |
ea5b213a | 677 | int max_clock = intel_dp_max_link_bw(intel_dp) == DP_LINK_BW_2_7 ? 1 : 0; |
083f9560 | 678 | int bpp, mode_rate; |
a4fc5ed6 | 679 | static int bws[2] = { DP_LINK_BW_1_62, DP_LINK_BW_2_7 }; |
ff9a6750 | 680 | int link_avail, link_clock; |
a4fc5ed6 | 681 | |
bc7d38a4 | 682 | if (HAS_PCH_SPLIT(dev) && !HAS_DDI(dev) && port != PORT_A) |
5bfe2ac0 DV |
683 | pipe_config->has_pch_encoder = true; |
684 | ||
03afc4a2 DV |
685 | pipe_config->has_dp_encoder = true; |
686 | ||
dd06f90e JN |
687 | if (is_edp(intel_dp) && intel_connector->panel.fixed_mode) { |
688 | intel_fixed_panel_mode(intel_connector->panel.fixed_mode, | |
689 | adjusted_mode); | |
2dd24552 JB |
690 | if (!HAS_PCH_SPLIT(dev)) |
691 | intel_gmch_panel_fitting(intel_crtc, pipe_config, | |
692 | intel_connector->panel.fitting_mode); | |
693 | else | |
b074cec8 JB |
694 | intel_pch_panel_fitting(intel_crtc, pipe_config, |
695 | intel_connector->panel.fitting_mode); | |
0d3a1bee ZY |
696 | } |
697 | ||
cb1793ce | 698 | if (adjusted_mode->flags & DRM_MODE_FLAG_DBLCLK) |
0af78a2b DV |
699 | return false; |
700 | ||
083f9560 DV |
701 | DRM_DEBUG_KMS("DP link computation with max lane count %i " |
702 | "max bw %02x pixel clock %iKHz\n", | |
71244653 | 703 | max_lane_count, bws[max_clock], adjusted_mode->clock); |
083f9560 | 704 | |
36008365 DV |
705 | /* Walk through all bpp values. Luckily they're all nicely spaced with 2 |
706 | * bpc in between. */ | |
03afc4a2 | 707 | bpp = min_t(int, 8*3, pipe_config->pipe_bpp); |
e1b73cba DV |
708 | if (is_edp(intel_dp) && dev_priv->vbt.edp_bpp) |
709 | bpp = min_t(int, bpp, dev_priv->vbt.edp_bpp); | |
af13188a | 710 | |
36008365 | 711 | for (; bpp >= 6*3; bpp -= 2*3) { |
ff9a6750 | 712 | mode_rate = intel_dp_link_required(adjusted_mode->clock, bpp); |
36008365 DV |
713 | |
714 | for (clock = 0; clock <= max_clock; clock++) { | |
715 | for (lane_count = 1; lane_count <= max_lane_count; lane_count <<= 1) { | |
716 | link_clock = drm_dp_bw_code_to_link_rate(bws[clock]); | |
717 | link_avail = intel_dp_max_data_rate(link_clock, | |
718 | lane_count); | |
719 | ||
720 | if (mode_rate <= link_avail) { | |
721 | goto found; | |
722 | } | |
723 | } | |
724 | } | |
725 | } | |
c4867936 | 726 | |
36008365 | 727 | return false; |
3685a8f3 | 728 | |
36008365 | 729 | found: |
55bc60db VS |
730 | if (intel_dp->color_range_auto) { |
731 | /* | |
732 | * See: | |
733 | * CEA-861-E - 5.1 Default Encoding Parameters | |
734 | * VESA DisplayPort Ver.1.2a - 5.1.1.1 Video Colorimetry | |
735 | */ | |
18316c8c | 736 | if (bpp != 18 && drm_match_cea_mode(adjusted_mode) > 1) |
55bc60db VS |
737 | intel_dp->color_range = DP_COLOR_RANGE_16_235; |
738 | else | |
739 | intel_dp->color_range = 0; | |
740 | } | |
741 | ||
3685a8f3 | 742 | if (intel_dp->color_range) |
50f3b016 | 743 | pipe_config->limited_color_range = true; |
3685a8f3 | 744 | |
36008365 DV |
745 | intel_dp->link_bw = bws[clock]; |
746 | intel_dp->lane_count = lane_count; | |
657445fe | 747 | pipe_config->pipe_bpp = bpp; |
ff9a6750 | 748 | pipe_config->port_clock = drm_dp_bw_code_to_link_rate(intel_dp->link_bw); |
fe27d53e | 749 | |
36008365 DV |
750 | DRM_DEBUG_KMS("DP link bw %02x lane count %d clock %d bpp %d\n", |
751 | intel_dp->link_bw, intel_dp->lane_count, | |
ff9a6750 | 752 | pipe_config->port_clock, bpp); |
36008365 DV |
753 | DRM_DEBUG_KMS("DP link bw required %i available %i\n", |
754 | mode_rate, link_avail); | |
755 | ||
03afc4a2 | 756 | intel_link_compute_m_n(bpp, lane_count, |
ff9a6750 | 757 | adjusted_mode->clock, pipe_config->port_clock, |
03afc4a2 | 758 | &pipe_config->dp_m_n); |
a4fc5ed6 | 759 | |
c6bb3538 DV |
760 | intel_dp_set_clock(encoder, pipe_config, intel_dp->link_bw); |
761 | ||
03afc4a2 | 762 | return true; |
a4fc5ed6 KP |
763 | } |
764 | ||
247d89f6 PZ |
765 | void intel_dp_init_link_config(struct intel_dp *intel_dp) |
766 | { | |
767 | memset(intel_dp->link_configuration, 0, DP_LINK_CONFIGURATION_SIZE); | |
768 | intel_dp->link_configuration[0] = intel_dp->link_bw; | |
769 | intel_dp->link_configuration[1] = intel_dp->lane_count; | |
770 | intel_dp->link_configuration[8] = DP_SET_ANSI_8B10B; | |
771 | /* | |
772 | * Check for DPCD version > 1.1 and enhanced framing support | |
773 | */ | |
774 | if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11 && | |
775 | (intel_dp->dpcd[DP_MAX_LANE_COUNT] & DP_ENHANCED_FRAME_CAP)) { | |
776 | intel_dp->link_configuration[1] |= DP_LANE_COUNT_ENHANCED_FRAME_EN; | |
777 | } | |
778 | } | |
779 | ||
7c62a164 | 780 | static void ironlake_set_pll_cpu_edp(struct intel_dp *intel_dp) |
ea9b6006 | 781 | { |
7c62a164 DV |
782 | struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp); |
783 | struct intel_crtc *crtc = to_intel_crtc(dig_port->base.base.crtc); | |
784 | struct drm_device *dev = crtc->base.dev; | |
ea9b6006 DV |
785 | struct drm_i915_private *dev_priv = dev->dev_private; |
786 | u32 dpa_ctl; | |
787 | ||
ff9a6750 | 788 | DRM_DEBUG_KMS("eDP PLL enable for clock %d\n", crtc->config.port_clock); |
ea9b6006 DV |
789 | dpa_ctl = I915_READ(DP_A); |
790 | dpa_ctl &= ~DP_PLL_FREQ_MASK; | |
791 | ||
ff9a6750 | 792 | if (crtc->config.port_clock == 162000) { |
1ce17038 DV |
793 | /* For a long time we've carried around a ILK-DevA w/a for the |
794 | * 160MHz clock. If we're really unlucky, it's still required. | |
795 | */ | |
796 | DRM_DEBUG_KMS("160MHz cpu eDP clock, might need ilk devA w/a\n"); | |
ea9b6006 | 797 | dpa_ctl |= DP_PLL_FREQ_160MHZ; |
7c62a164 | 798 | intel_dp->DP |= DP_PLL_FREQ_160MHZ; |
ea9b6006 DV |
799 | } else { |
800 | dpa_ctl |= DP_PLL_FREQ_270MHZ; | |
7c62a164 | 801 | intel_dp->DP |= DP_PLL_FREQ_270MHZ; |
ea9b6006 | 802 | } |
1ce17038 | 803 | |
ea9b6006 DV |
804 | I915_WRITE(DP_A, dpa_ctl); |
805 | ||
806 | POSTING_READ(DP_A); | |
807 | udelay(500); | |
808 | } | |
809 | ||
a4fc5ed6 KP |
810 | static void |
811 | intel_dp_mode_set(struct drm_encoder *encoder, struct drm_display_mode *mode, | |
812 | struct drm_display_mode *adjusted_mode) | |
813 | { | |
e3421a18 | 814 | struct drm_device *dev = encoder->dev; |
417e822d | 815 | struct drm_i915_private *dev_priv = dev->dev_private; |
ea5b213a | 816 | struct intel_dp *intel_dp = enc_to_intel_dp(encoder); |
bc7d38a4 | 817 | enum port port = dp_to_dig_port(intel_dp)->port; |
7c62a164 | 818 | struct intel_crtc *crtc = to_intel_crtc(encoder->crtc); |
a4fc5ed6 | 819 | |
417e822d | 820 | /* |
1a2eb460 | 821 | * There are four kinds of DP registers: |
417e822d KP |
822 | * |
823 | * IBX PCH | |
1a2eb460 KP |
824 | * SNB CPU |
825 | * IVB CPU | |
417e822d KP |
826 | * CPT PCH |
827 | * | |
828 | * IBX PCH and CPU are the same for almost everything, | |
829 | * except that the CPU DP PLL is configured in this | |
830 | * register | |
831 | * | |
832 | * CPT PCH is quite different, having many bits moved | |
833 | * to the TRANS_DP_CTL register instead. That | |
834 | * configuration happens (oddly) in ironlake_pch_enable | |
835 | */ | |
9c9e7927 | 836 | |
417e822d KP |
837 | /* Preserve the BIOS-computed detected bit. This is |
838 | * supposed to be read-only. | |
839 | */ | |
840 | intel_dp->DP = I915_READ(intel_dp->output_reg) & DP_DETECTED; | |
a4fc5ed6 | 841 | |
417e822d | 842 | /* Handle DP bits in common between all three register formats */ |
417e822d | 843 | intel_dp->DP |= DP_VOLTAGE_0_4 | DP_PRE_EMPHASIS_0; |
17aa6be9 | 844 | intel_dp->DP |= DP_PORT_WIDTH(intel_dp->lane_count); |
a4fc5ed6 | 845 | |
e0dac65e WF |
846 | if (intel_dp->has_audio) { |
847 | DRM_DEBUG_DRIVER("Enabling DP audio on pipe %c\n", | |
7c62a164 | 848 | pipe_name(crtc->pipe)); |
ea5b213a | 849 | intel_dp->DP |= DP_AUDIO_OUTPUT_ENABLE; |
e0dac65e WF |
850 | intel_write_eld(encoder, adjusted_mode); |
851 | } | |
247d89f6 PZ |
852 | |
853 | intel_dp_init_link_config(intel_dp); | |
a4fc5ed6 | 854 | |
417e822d | 855 | /* Split out the IBX/CPU vs CPT settings */ |
32f9d658 | 856 | |
bc7d38a4 | 857 | if (port == PORT_A && IS_GEN7(dev) && !IS_VALLEYVIEW(dev)) { |
1a2eb460 KP |
858 | if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC) |
859 | intel_dp->DP |= DP_SYNC_HS_HIGH; | |
860 | if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC) | |
861 | intel_dp->DP |= DP_SYNC_VS_HIGH; | |
862 | intel_dp->DP |= DP_LINK_TRAIN_OFF_CPT; | |
863 | ||
864 | if (intel_dp->link_configuration[1] & DP_LANE_COUNT_ENHANCED_FRAME_EN) | |
865 | intel_dp->DP |= DP_ENHANCED_FRAMING; | |
866 | ||
7c62a164 | 867 | intel_dp->DP |= crtc->pipe << 29; |
bc7d38a4 | 868 | } else if (!HAS_PCH_CPT(dev) || port == PORT_A) { |
b2634017 | 869 | if (!HAS_PCH_SPLIT(dev) && !IS_VALLEYVIEW(dev)) |
3685a8f3 | 870 | intel_dp->DP |= intel_dp->color_range; |
417e822d KP |
871 | |
872 | if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC) | |
873 | intel_dp->DP |= DP_SYNC_HS_HIGH; | |
874 | if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC) | |
875 | intel_dp->DP |= DP_SYNC_VS_HIGH; | |
876 | intel_dp->DP |= DP_LINK_TRAIN_OFF; | |
877 | ||
878 | if (intel_dp->link_configuration[1] & DP_LANE_COUNT_ENHANCED_FRAME_EN) | |
879 | intel_dp->DP |= DP_ENHANCED_FRAMING; | |
880 | ||
7c62a164 | 881 | if (crtc->pipe == 1) |
417e822d | 882 | intel_dp->DP |= DP_PIPEB_SELECT; |
417e822d KP |
883 | } else { |
884 | intel_dp->DP |= DP_LINK_TRAIN_OFF_CPT; | |
32f9d658 | 885 | } |
ea9b6006 | 886 | |
bc7d38a4 | 887 | if (port == PORT_A && !IS_VALLEYVIEW(dev)) |
7c62a164 | 888 | ironlake_set_pll_cpu_edp(intel_dp); |
a4fc5ed6 KP |
889 | } |
890 | ||
99ea7127 KP |
891 | #define IDLE_ON_MASK (PP_ON | 0 | PP_SEQUENCE_MASK | 0 | PP_SEQUENCE_STATE_MASK) |
892 | #define IDLE_ON_VALUE (PP_ON | 0 | PP_SEQUENCE_NONE | 0 | PP_SEQUENCE_STATE_ON_IDLE) | |
893 | ||
894 | #define IDLE_OFF_MASK (PP_ON | 0 | PP_SEQUENCE_MASK | 0 | PP_SEQUENCE_STATE_MASK) | |
895 | #define IDLE_OFF_VALUE (0 | 0 | PP_SEQUENCE_NONE | 0 | PP_SEQUENCE_STATE_OFF_IDLE) | |
896 | ||
897 | #define IDLE_CYCLE_MASK (PP_ON | 0 | PP_SEQUENCE_MASK | PP_CYCLE_DELAY_ACTIVE | PP_SEQUENCE_STATE_MASK) | |
898 | #define IDLE_CYCLE_VALUE (0 | 0 | PP_SEQUENCE_NONE | 0 | PP_SEQUENCE_STATE_OFF_IDLE) | |
899 | ||
900 | static void ironlake_wait_panel_status(struct intel_dp *intel_dp, | |
901 | u32 mask, | |
902 | u32 value) | |
bd943159 | 903 | { |
30add22d | 904 | struct drm_device *dev = intel_dp_to_dev(intel_dp); |
99ea7127 | 905 | struct drm_i915_private *dev_priv = dev->dev_private; |
453c5420 JB |
906 | u32 pp_stat_reg, pp_ctrl_reg; |
907 | ||
908 | pp_stat_reg = IS_VALLEYVIEW(dev) ? PIPEA_PP_STATUS : PCH_PP_STATUS; | |
909 | pp_ctrl_reg = IS_VALLEYVIEW(dev) ? PIPEA_PP_CONTROL : PCH_PP_CONTROL; | |
32ce697c | 910 | |
99ea7127 | 911 | DRM_DEBUG_KMS("mask %08x value %08x status %08x control %08x\n", |
453c5420 JB |
912 | mask, value, |
913 | I915_READ(pp_stat_reg), | |
914 | I915_READ(pp_ctrl_reg)); | |
32ce697c | 915 | |
453c5420 | 916 | if (_wait_for((I915_READ(pp_stat_reg) & mask) == value, 5000, 10)) { |
99ea7127 | 917 | DRM_ERROR("Panel status timeout: status %08x control %08x\n", |
453c5420 JB |
918 | I915_READ(pp_stat_reg), |
919 | I915_READ(pp_ctrl_reg)); | |
32ce697c | 920 | } |
99ea7127 | 921 | } |
32ce697c | 922 | |
99ea7127 KP |
923 | static void ironlake_wait_panel_on(struct intel_dp *intel_dp) |
924 | { | |
925 | DRM_DEBUG_KMS("Wait for panel power on\n"); | |
926 | ironlake_wait_panel_status(intel_dp, IDLE_ON_MASK, IDLE_ON_VALUE); | |
bd943159 KP |
927 | } |
928 | ||
99ea7127 KP |
929 | static void ironlake_wait_panel_off(struct intel_dp *intel_dp) |
930 | { | |
931 | DRM_DEBUG_KMS("Wait for panel power off time\n"); | |
932 | ironlake_wait_panel_status(intel_dp, IDLE_OFF_MASK, IDLE_OFF_VALUE); | |
933 | } | |
934 | ||
935 | static void ironlake_wait_panel_power_cycle(struct intel_dp *intel_dp) | |
936 | { | |
937 | DRM_DEBUG_KMS("Wait for panel power cycle\n"); | |
938 | ironlake_wait_panel_status(intel_dp, IDLE_CYCLE_MASK, IDLE_CYCLE_VALUE); | |
939 | } | |
940 | ||
941 | ||
832dd3c1 KP |
942 | /* Read the current pp_control value, unlocking the register if it |
943 | * is locked | |
944 | */ | |
945 | ||
453c5420 | 946 | static u32 ironlake_get_pp_control(struct intel_dp *intel_dp) |
832dd3c1 | 947 | { |
453c5420 JB |
948 | struct drm_device *dev = intel_dp_to_dev(intel_dp); |
949 | struct drm_i915_private *dev_priv = dev->dev_private; | |
950 | u32 control; | |
951 | u32 pp_ctrl_reg; | |
952 | ||
953 | pp_ctrl_reg = IS_VALLEYVIEW(dev) ? PIPEA_PP_CONTROL : PCH_PP_CONTROL; | |
954 | control = I915_READ(pp_ctrl_reg); | |
832dd3c1 KP |
955 | |
956 | control &= ~PANEL_UNLOCK_MASK; | |
957 | control |= PANEL_UNLOCK_REGS; | |
958 | return control; | |
bd943159 KP |
959 | } |
960 | ||
82a4d9c0 | 961 | void ironlake_edp_panel_vdd_on(struct intel_dp *intel_dp) |
5d613501 | 962 | { |
30add22d | 963 | struct drm_device *dev = intel_dp_to_dev(intel_dp); |
5d613501 JB |
964 | struct drm_i915_private *dev_priv = dev->dev_private; |
965 | u32 pp; | |
453c5420 | 966 | u32 pp_stat_reg, pp_ctrl_reg; |
5d613501 | 967 | |
97af61f5 KP |
968 | if (!is_edp(intel_dp)) |
969 | return; | |
f01eca2e | 970 | DRM_DEBUG_KMS("Turn eDP VDD on\n"); |
5d613501 | 971 | |
bd943159 KP |
972 | WARN(intel_dp->want_panel_vdd, |
973 | "eDP VDD already requested on\n"); | |
974 | ||
975 | intel_dp->want_panel_vdd = true; | |
99ea7127 | 976 | |
bd943159 KP |
977 | if (ironlake_edp_have_panel_vdd(intel_dp)) { |
978 | DRM_DEBUG_KMS("eDP VDD already on\n"); | |
979 | return; | |
980 | } | |
981 | ||
99ea7127 KP |
982 | if (!ironlake_edp_have_panel_power(intel_dp)) |
983 | ironlake_wait_panel_power_cycle(intel_dp); | |
984 | ||
453c5420 | 985 | pp = ironlake_get_pp_control(intel_dp); |
5d613501 | 986 | pp |= EDP_FORCE_VDD; |
ebf33b18 | 987 | |
453c5420 JB |
988 | pp_stat_reg = IS_VALLEYVIEW(dev) ? PIPEA_PP_STATUS : PCH_PP_STATUS; |
989 | pp_ctrl_reg = IS_VALLEYVIEW(dev) ? PIPEA_PP_CONTROL : PCH_PP_CONTROL; | |
990 | ||
991 | I915_WRITE(pp_ctrl_reg, pp); | |
992 | POSTING_READ(pp_ctrl_reg); | |
993 | DRM_DEBUG_KMS("PP_STATUS: 0x%08x PP_CONTROL: 0x%08x\n", | |
994 | I915_READ(pp_stat_reg), I915_READ(pp_ctrl_reg)); | |
ebf33b18 KP |
995 | /* |
996 | * If the panel wasn't on, delay before accessing aux channel | |
997 | */ | |
998 | if (!ironlake_edp_have_panel_power(intel_dp)) { | |
bd943159 | 999 | DRM_DEBUG_KMS("eDP was not running\n"); |
f01eca2e | 1000 | msleep(intel_dp->panel_power_up_delay); |
f01eca2e | 1001 | } |
5d613501 JB |
1002 | } |
1003 | ||
bd943159 | 1004 | static void ironlake_panel_vdd_off_sync(struct intel_dp *intel_dp) |
5d613501 | 1005 | { |
30add22d | 1006 | struct drm_device *dev = intel_dp_to_dev(intel_dp); |
5d613501 JB |
1007 | struct drm_i915_private *dev_priv = dev->dev_private; |
1008 | u32 pp; | |
453c5420 | 1009 | u32 pp_stat_reg, pp_ctrl_reg; |
5d613501 | 1010 | |
a0e99e68 DV |
1011 | WARN_ON(!mutex_is_locked(&dev->mode_config.mutex)); |
1012 | ||
bd943159 | 1013 | if (!intel_dp->want_panel_vdd && ironlake_edp_have_panel_vdd(intel_dp)) { |
453c5420 | 1014 | pp = ironlake_get_pp_control(intel_dp); |
bd943159 | 1015 | pp &= ~EDP_FORCE_VDD; |
bd943159 | 1016 | |
453c5420 JB |
1017 | pp_stat_reg = IS_VALLEYVIEW(dev) ? PIPEA_PP_STATUS : PCH_PP_STATUS; |
1018 | pp_ctrl_reg = IS_VALLEYVIEW(dev) ? PIPEA_PP_CONTROL : PCH_PP_CONTROL; | |
1019 | ||
1020 | I915_WRITE(pp_ctrl_reg, pp); | |
1021 | POSTING_READ(pp_ctrl_reg); | |
99ea7127 | 1022 | |
453c5420 JB |
1023 | /* Make sure sequencer is idle before allowing subsequent activity */ |
1024 | DRM_DEBUG_KMS("PP_STATUS: 0x%08x PP_CONTROL: 0x%08x\n", | |
1025 | I915_READ(pp_stat_reg), I915_READ(pp_ctrl_reg)); | |
99ea7127 | 1026 | msleep(intel_dp->panel_power_down_delay); |
bd943159 KP |
1027 | } |
1028 | } | |
5d613501 | 1029 | |
bd943159 KP |
1030 | static void ironlake_panel_vdd_work(struct work_struct *__work) |
1031 | { | |
1032 | struct intel_dp *intel_dp = container_of(to_delayed_work(__work), | |
1033 | struct intel_dp, panel_vdd_work); | |
30add22d | 1034 | struct drm_device *dev = intel_dp_to_dev(intel_dp); |
bd943159 | 1035 | |
627f7675 | 1036 | mutex_lock(&dev->mode_config.mutex); |
bd943159 | 1037 | ironlake_panel_vdd_off_sync(intel_dp); |
627f7675 | 1038 | mutex_unlock(&dev->mode_config.mutex); |
bd943159 KP |
1039 | } |
1040 | ||
82a4d9c0 | 1041 | void ironlake_edp_panel_vdd_off(struct intel_dp *intel_dp, bool sync) |
bd943159 | 1042 | { |
97af61f5 KP |
1043 | if (!is_edp(intel_dp)) |
1044 | return; | |
5d613501 | 1045 | |
bd943159 KP |
1046 | DRM_DEBUG_KMS("Turn eDP VDD off %d\n", intel_dp->want_panel_vdd); |
1047 | WARN(!intel_dp->want_panel_vdd, "eDP VDD not forced on"); | |
f2e8b18a | 1048 | |
bd943159 KP |
1049 | intel_dp->want_panel_vdd = false; |
1050 | ||
1051 | if (sync) { | |
1052 | ironlake_panel_vdd_off_sync(intel_dp); | |
1053 | } else { | |
1054 | /* | |
1055 | * Queue the timer to fire a long | |
1056 | * time from now (relative to the power down delay) | |
1057 | * to keep the panel power up across a sequence of operations | |
1058 | */ | |
1059 | schedule_delayed_work(&intel_dp->panel_vdd_work, | |
1060 | msecs_to_jiffies(intel_dp->panel_power_cycle_delay * 5)); | |
1061 | } | |
5d613501 JB |
1062 | } |
1063 | ||
82a4d9c0 | 1064 | void ironlake_edp_panel_on(struct intel_dp *intel_dp) |
9934c132 | 1065 | { |
30add22d | 1066 | struct drm_device *dev = intel_dp_to_dev(intel_dp); |
9934c132 | 1067 | struct drm_i915_private *dev_priv = dev->dev_private; |
99ea7127 | 1068 | u32 pp; |
453c5420 | 1069 | u32 pp_ctrl_reg; |
9934c132 | 1070 | |
97af61f5 | 1071 | if (!is_edp(intel_dp)) |
bd943159 | 1072 | return; |
99ea7127 KP |
1073 | |
1074 | DRM_DEBUG_KMS("Turn eDP power on\n"); | |
1075 | ||
1076 | if (ironlake_edp_have_panel_power(intel_dp)) { | |
1077 | DRM_DEBUG_KMS("eDP power already on\n"); | |
7d639f35 | 1078 | return; |
99ea7127 | 1079 | } |
9934c132 | 1080 | |
99ea7127 | 1081 | ironlake_wait_panel_power_cycle(intel_dp); |
37c6c9b0 | 1082 | |
453c5420 | 1083 | pp = ironlake_get_pp_control(intel_dp); |
05ce1a49 KP |
1084 | if (IS_GEN5(dev)) { |
1085 | /* ILK workaround: disable reset around power sequence */ | |
1086 | pp &= ~PANEL_POWER_RESET; | |
1087 | I915_WRITE(PCH_PP_CONTROL, pp); | |
1088 | POSTING_READ(PCH_PP_CONTROL); | |
1089 | } | |
37c6c9b0 | 1090 | |
1c0ae80a | 1091 | pp |= POWER_TARGET_ON; |
99ea7127 KP |
1092 | if (!IS_GEN5(dev)) |
1093 | pp |= PANEL_POWER_RESET; | |
1094 | ||
453c5420 JB |
1095 | pp_ctrl_reg = IS_VALLEYVIEW(dev) ? PIPEA_PP_CONTROL : PCH_PP_CONTROL; |
1096 | ||
1097 | I915_WRITE(pp_ctrl_reg, pp); | |
1098 | POSTING_READ(pp_ctrl_reg); | |
9934c132 | 1099 | |
99ea7127 | 1100 | ironlake_wait_panel_on(intel_dp); |
9934c132 | 1101 | |
05ce1a49 KP |
1102 | if (IS_GEN5(dev)) { |
1103 | pp |= PANEL_POWER_RESET; /* restore panel reset bit */ | |
1104 | I915_WRITE(PCH_PP_CONTROL, pp); | |
1105 | POSTING_READ(PCH_PP_CONTROL); | |
1106 | } | |
9934c132 JB |
1107 | } |
1108 | ||
82a4d9c0 | 1109 | void ironlake_edp_panel_off(struct intel_dp *intel_dp) |
9934c132 | 1110 | { |
30add22d | 1111 | struct drm_device *dev = intel_dp_to_dev(intel_dp); |
9934c132 | 1112 | struct drm_i915_private *dev_priv = dev->dev_private; |
99ea7127 | 1113 | u32 pp; |
453c5420 | 1114 | u32 pp_ctrl_reg; |
9934c132 | 1115 | |
97af61f5 KP |
1116 | if (!is_edp(intel_dp)) |
1117 | return; | |
37c6c9b0 | 1118 | |
99ea7127 | 1119 | DRM_DEBUG_KMS("Turn eDP power off\n"); |
37c6c9b0 | 1120 | |
6cb49835 | 1121 | WARN(!intel_dp->want_panel_vdd, "Need VDD to turn off panel\n"); |
37c6c9b0 | 1122 | |
453c5420 | 1123 | pp = ironlake_get_pp_control(intel_dp); |
35a38556 DV |
1124 | /* We need to switch off panel power _and_ force vdd, for otherwise some |
1125 | * panels get very unhappy and cease to work. */ | |
1126 | pp &= ~(POWER_TARGET_ON | EDP_FORCE_VDD | PANEL_POWER_RESET | EDP_BLC_ENABLE); | |
453c5420 JB |
1127 | |
1128 | pp_ctrl_reg = IS_VALLEYVIEW(dev) ? PIPEA_PP_CONTROL : PCH_PP_CONTROL; | |
1129 | ||
1130 | I915_WRITE(pp_ctrl_reg, pp); | |
1131 | POSTING_READ(pp_ctrl_reg); | |
9934c132 | 1132 | |
35a38556 DV |
1133 | intel_dp->want_panel_vdd = false; |
1134 | ||
99ea7127 | 1135 | ironlake_wait_panel_off(intel_dp); |
9934c132 JB |
1136 | } |
1137 | ||
d6c50ff8 | 1138 | void ironlake_edp_backlight_on(struct intel_dp *intel_dp) |
32f9d658 | 1139 | { |
da63a9f2 PZ |
1140 | struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp); |
1141 | struct drm_device *dev = intel_dig_port->base.base.dev; | |
32f9d658 | 1142 | struct drm_i915_private *dev_priv = dev->dev_private; |
da63a9f2 | 1143 | int pipe = to_intel_crtc(intel_dig_port->base.base.crtc)->pipe; |
32f9d658 | 1144 | u32 pp; |
453c5420 | 1145 | u32 pp_ctrl_reg; |
32f9d658 | 1146 | |
f01eca2e KP |
1147 | if (!is_edp(intel_dp)) |
1148 | return; | |
1149 | ||
28c97730 | 1150 | DRM_DEBUG_KMS("\n"); |
01cb9ea6 JB |
1151 | /* |
1152 | * If we enable the backlight right away following a panel power | |
1153 | * on, we may see slight flicker as the panel syncs with the eDP | |
1154 | * link. So delay a bit to make sure the image is solid before | |
1155 | * allowing it to appear. | |
1156 | */ | |
f01eca2e | 1157 | msleep(intel_dp->backlight_on_delay); |
453c5420 | 1158 | pp = ironlake_get_pp_control(intel_dp); |
32f9d658 | 1159 | pp |= EDP_BLC_ENABLE; |
453c5420 JB |
1160 | |
1161 | pp_ctrl_reg = IS_VALLEYVIEW(dev) ? PIPEA_PP_CONTROL : PCH_PP_CONTROL; | |
1162 | ||
1163 | I915_WRITE(pp_ctrl_reg, pp); | |
1164 | POSTING_READ(pp_ctrl_reg); | |
035aa3de DV |
1165 | |
1166 | intel_panel_enable_backlight(dev, pipe); | |
32f9d658 ZW |
1167 | } |
1168 | ||
d6c50ff8 | 1169 | void ironlake_edp_backlight_off(struct intel_dp *intel_dp) |
32f9d658 | 1170 | { |
30add22d | 1171 | struct drm_device *dev = intel_dp_to_dev(intel_dp); |
32f9d658 ZW |
1172 | struct drm_i915_private *dev_priv = dev->dev_private; |
1173 | u32 pp; | |
453c5420 | 1174 | u32 pp_ctrl_reg; |
32f9d658 | 1175 | |
f01eca2e KP |
1176 | if (!is_edp(intel_dp)) |
1177 | return; | |
1178 | ||
035aa3de DV |
1179 | intel_panel_disable_backlight(dev); |
1180 | ||
28c97730 | 1181 | DRM_DEBUG_KMS("\n"); |
453c5420 | 1182 | pp = ironlake_get_pp_control(intel_dp); |
32f9d658 | 1183 | pp &= ~EDP_BLC_ENABLE; |
453c5420 JB |
1184 | |
1185 | pp_ctrl_reg = IS_VALLEYVIEW(dev) ? PIPEA_PP_CONTROL : PCH_PP_CONTROL; | |
1186 | ||
1187 | I915_WRITE(pp_ctrl_reg, pp); | |
1188 | POSTING_READ(pp_ctrl_reg); | |
f01eca2e | 1189 | msleep(intel_dp->backlight_off_delay); |
32f9d658 | 1190 | } |
a4fc5ed6 | 1191 | |
2bd2ad64 | 1192 | static void ironlake_edp_pll_on(struct intel_dp *intel_dp) |
d240f20f | 1193 | { |
da63a9f2 PZ |
1194 | struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp); |
1195 | struct drm_crtc *crtc = intel_dig_port->base.base.crtc; | |
1196 | struct drm_device *dev = crtc->dev; | |
d240f20f JB |
1197 | struct drm_i915_private *dev_priv = dev->dev_private; |
1198 | u32 dpa_ctl; | |
1199 | ||
2bd2ad64 DV |
1200 | assert_pipe_disabled(dev_priv, |
1201 | to_intel_crtc(crtc)->pipe); | |
1202 | ||
d240f20f JB |
1203 | DRM_DEBUG_KMS("\n"); |
1204 | dpa_ctl = I915_READ(DP_A); | |
0767935e DV |
1205 | WARN(dpa_ctl & DP_PLL_ENABLE, "dp pll on, should be off\n"); |
1206 | WARN(dpa_ctl & DP_PORT_EN, "dp port still on, should be off\n"); | |
1207 | ||
1208 | /* We don't adjust intel_dp->DP while tearing down the link, to | |
1209 | * facilitate link retraining (e.g. after hotplug). Hence clear all | |
1210 | * enable bits here to ensure that we don't enable too much. */ | |
1211 | intel_dp->DP &= ~(DP_PORT_EN | DP_AUDIO_OUTPUT_ENABLE); | |
1212 | intel_dp->DP |= DP_PLL_ENABLE; | |
1213 | I915_WRITE(DP_A, intel_dp->DP); | |
298b0b39 JB |
1214 | POSTING_READ(DP_A); |
1215 | udelay(200); | |
d240f20f JB |
1216 | } |
1217 | ||
2bd2ad64 | 1218 | static void ironlake_edp_pll_off(struct intel_dp *intel_dp) |
d240f20f | 1219 | { |
da63a9f2 PZ |
1220 | struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp); |
1221 | struct drm_crtc *crtc = intel_dig_port->base.base.crtc; | |
1222 | struct drm_device *dev = crtc->dev; | |
d240f20f JB |
1223 | struct drm_i915_private *dev_priv = dev->dev_private; |
1224 | u32 dpa_ctl; | |
1225 | ||
2bd2ad64 DV |
1226 | assert_pipe_disabled(dev_priv, |
1227 | to_intel_crtc(crtc)->pipe); | |
1228 | ||
d240f20f | 1229 | dpa_ctl = I915_READ(DP_A); |
0767935e DV |
1230 | WARN((dpa_ctl & DP_PLL_ENABLE) == 0, |
1231 | "dp pll off, should be on\n"); | |
1232 | WARN(dpa_ctl & DP_PORT_EN, "dp port still on, should be off\n"); | |
1233 | ||
1234 | /* We can't rely on the value tracked for the DP register in | |
1235 | * intel_dp->DP because link_down must not change that (otherwise link | |
1236 | * re-training will fail. */ | |
298b0b39 | 1237 | dpa_ctl &= ~DP_PLL_ENABLE; |
d240f20f | 1238 | I915_WRITE(DP_A, dpa_ctl); |
1af5fa1b | 1239 | POSTING_READ(DP_A); |
d240f20f JB |
1240 | udelay(200); |
1241 | } | |
1242 | ||
c7ad3810 | 1243 | /* If the sink supports it, try to set the power state appropriately */ |
c19b0669 | 1244 | void intel_dp_sink_dpms(struct intel_dp *intel_dp, int mode) |
c7ad3810 JB |
1245 | { |
1246 | int ret, i; | |
1247 | ||
1248 | /* Should have a valid DPCD by this point */ | |
1249 | if (intel_dp->dpcd[DP_DPCD_REV] < 0x11) | |
1250 | return; | |
1251 | ||
1252 | if (mode != DRM_MODE_DPMS_ON) { | |
1253 | ret = intel_dp_aux_native_write_1(intel_dp, DP_SET_POWER, | |
1254 | DP_SET_POWER_D3); | |
1255 | if (ret != 1) | |
1256 | DRM_DEBUG_DRIVER("failed to write sink power state\n"); | |
1257 | } else { | |
1258 | /* | |
1259 | * When turning on, we need to retry for 1ms to give the sink | |
1260 | * time to wake up. | |
1261 | */ | |
1262 | for (i = 0; i < 3; i++) { | |
1263 | ret = intel_dp_aux_native_write_1(intel_dp, | |
1264 | DP_SET_POWER, | |
1265 | DP_SET_POWER_D0); | |
1266 | if (ret == 1) | |
1267 | break; | |
1268 | msleep(1); | |
1269 | } | |
1270 | } | |
1271 | } | |
1272 | ||
19d8fe15 DV |
1273 | static bool intel_dp_get_hw_state(struct intel_encoder *encoder, |
1274 | enum pipe *pipe) | |
d240f20f | 1275 | { |
19d8fe15 | 1276 | struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base); |
bc7d38a4 | 1277 | enum port port = dp_to_dig_port(intel_dp)->port; |
19d8fe15 DV |
1278 | struct drm_device *dev = encoder->base.dev; |
1279 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1280 | u32 tmp = I915_READ(intel_dp->output_reg); | |
1281 | ||
1282 | if (!(tmp & DP_PORT_EN)) | |
1283 | return false; | |
1284 | ||
bc7d38a4 | 1285 | if (port == PORT_A && IS_GEN7(dev) && !IS_VALLEYVIEW(dev)) { |
19d8fe15 | 1286 | *pipe = PORT_TO_PIPE_CPT(tmp); |
bc7d38a4 | 1287 | } else if (!HAS_PCH_CPT(dev) || port == PORT_A) { |
19d8fe15 DV |
1288 | *pipe = PORT_TO_PIPE(tmp); |
1289 | } else { | |
1290 | u32 trans_sel; | |
1291 | u32 trans_dp; | |
1292 | int i; | |
1293 | ||
1294 | switch (intel_dp->output_reg) { | |
1295 | case PCH_DP_B: | |
1296 | trans_sel = TRANS_DP_PORT_SEL_B; | |
1297 | break; | |
1298 | case PCH_DP_C: | |
1299 | trans_sel = TRANS_DP_PORT_SEL_C; | |
1300 | break; | |
1301 | case PCH_DP_D: | |
1302 | trans_sel = TRANS_DP_PORT_SEL_D; | |
1303 | break; | |
1304 | default: | |
1305 | return true; | |
1306 | } | |
1307 | ||
1308 | for_each_pipe(i) { | |
1309 | trans_dp = I915_READ(TRANS_DP_CTL(i)); | |
1310 | if ((trans_dp & TRANS_DP_PORT_SEL_MASK) == trans_sel) { | |
1311 | *pipe = i; | |
1312 | return true; | |
1313 | } | |
1314 | } | |
19d8fe15 | 1315 | |
4a0833ec DV |
1316 | DRM_DEBUG_KMS("No pipe for dp port 0x%x found\n", |
1317 | intel_dp->output_reg); | |
1318 | } | |
d240f20f | 1319 | |
2af8898b | 1320 | return true; |
19d8fe15 | 1321 | } |
d240f20f | 1322 | |
045ac3b5 JB |
1323 | static void intel_dp_get_config(struct intel_encoder *encoder, |
1324 | struct intel_crtc_config *pipe_config) | |
1325 | { | |
1326 | struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base); | |
1327 | struct drm_i915_private *dev_priv = encoder->base.dev->dev_private; | |
1328 | u32 tmp, flags = 0; | |
1329 | ||
1330 | tmp = I915_READ(intel_dp->output_reg); | |
1331 | ||
1332 | if (tmp & DP_SYNC_HS_HIGH) | |
1333 | flags |= DRM_MODE_FLAG_PHSYNC; | |
1334 | else | |
1335 | flags |= DRM_MODE_FLAG_NHSYNC; | |
1336 | ||
1337 | if (tmp & DP_SYNC_VS_HIGH) | |
1338 | flags |= DRM_MODE_FLAG_PVSYNC; | |
1339 | else | |
1340 | flags |= DRM_MODE_FLAG_NVSYNC; | |
1341 | ||
1342 | pipe_config->adjusted_mode.flags |= flags; | |
1343 | } | |
1344 | ||
e8cb4558 | 1345 | static void intel_disable_dp(struct intel_encoder *encoder) |
d240f20f | 1346 | { |
e8cb4558 | 1347 | struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base); |
982a3866 ID |
1348 | enum port port = dp_to_dig_port(intel_dp)->port; |
1349 | struct drm_device *dev = encoder->base.dev; | |
6cb49835 DV |
1350 | |
1351 | /* Make sure the panel is off before trying to change the mode. But also | |
1352 | * ensure that we have vdd while we switch off the panel. */ | |
1353 | ironlake_edp_panel_vdd_on(intel_dp); | |
21264c63 | 1354 | ironlake_edp_backlight_off(intel_dp); |
c7ad3810 | 1355 | intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON); |
35a38556 | 1356 | ironlake_edp_panel_off(intel_dp); |
3739850b DV |
1357 | |
1358 | /* cpu edp my only be disable _after_ the cpu pipe/plane is disabled. */ | |
982a3866 | 1359 | if (!(port == PORT_A || IS_VALLEYVIEW(dev))) |
3739850b | 1360 | intel_dp_link_down(intel_dp); |
d240f20f JB |
1361 | } |
1362 | ||
2bd2ad64 | 1363 | static void intel_post_disable_dp(struct intel_encoder *encoder) |
d240f20f | 1364 | { |
2bd2ad64 | 1365 | struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base); |
982a3866 | 1366 | enum port port = dp_to_dig_port(intel_dp)->port; |
b2634017 | 1367 | struct drm_device *dev = encoder->base.dev; |
2bd2ad64 | 1368 | |
982a3866 | 1369 | if (port == PORT_A || IS_VALLEYVIEW(dev)) { |
3739850b | 1370 | intel_dp_link_down(intel_dp); |
b2634017 JB |
1371 | if (!IS_VALLEYVIEW(dev)) |
1372 | ironlake_edp_pll_off(intel_dp); | |
3739850b | 1373 | } |
2bd2ad64 DV |
1374 | } |
1375 | ||
e8cb4558 | 1376 | static void intel_enable_dp(struct intel_encoder *encoder) |
d240f20f | 1377 | { |
e8cb4558 DV |
1378 | struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base); |
1379 | struct drm_device *dev = encoder->base.dev; | |
1380 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1381 | uint32_t dp_reg = I915_READ(intel_dp->output_reg); | |
5d613501 | 1382 | |
0c33d8d7 DV |
1383 | if (WARN_ON(dp_reg & DP_PORT_EN)) |
1384 | return; | |
5d613501 | 1385 | |
97af61f5 | 1386 | ironlake_edp_panel_vdd_on(intel_dp); |
f01eca2e | 1387 | intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON); |
33a34e4e | 1388 | intel_dp_start_link_train(intel_dp); |
97af61f5 | 1389 | ironlake_edp_panel_on(intel_dp); |
bd943159 | 1390 | ironlake_edp_panel_vdd_off(intel_dp, true); |
33a34e4e | 1391 | intel_dp_complete_link_train(intel_dp); |
3ab9c637 | 1392 | intel_dp_stop_link_train(intel_dp); |
f01eca2e | 1393 | ironlake_edp_backlight_on(intel_dp); |
89b667f8 JB |
1394 | |
1395 | if (IS_VALLEYVIEW(dev)) { | |
1396 | struct intel_digital_port *dport = | |
1397 | enc_to_dig_port(&encoder->base); | |
1398 | int channel = vlv_dport_to_channel(dport); | |
1399 | ||
1400 | vlv_wait_port_ready(dev_priv, channel); | |
1401 | } | |
d240f20f JB |
1402 | } |
1403 | ||
2bd2ad64 | 1404 | static void intel_pre_enable_dp(struct intel_encoder *encoder) |
a4fc5ed6 | 1405 | { |
2bd2ad64 | 1406 | struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base); |
bc7d38a4 | 1407 | struct intel_digital_port *dport = dp_to_dig_port(intel_dp); |
b2634017 | 1408 | struct drm_device *dev = encoder->base.dev; |
89b667f8 | 1409 | struct drm_i915_private *dev_priv = dev->dev_private; |
a4fc5ed6 | 1410 | |
bc7d38a4 | 1411 | if (dport->port == PORT_A && !IS_VALLEYVIEW(dev)) |
2bd2ad64 | 1412 | ironlake_edp_pll_on(intel_dp); |
89b667f8 JB |
1413 | |
1414 | if (IS_VALLEYVIEW(dev)) { | |
89b667f8 JB |
1415 | struct intel_crtc *intel_crtc = |
1416 | to_intel_crtc(encoder->base.crtc); | |
1417 | int port = vlv_dport_to_channel(dport); | |
1418 | int pipe = intel_crtc->pipe; | |
1419 | u32 val; | |
1420 | ||
ae99258f | 1421 | val = vlv_dpio_read(dev_priv, DPIO_DATA_LANE_A(port)); |
89b667f8 JB |
1422 | val = 0; |
1423 | if (pipe) | |
1424 | val |= (1<<21); | |
1425 | else | |
1426 | val &= ~(1<<21); | |
1427 | val |= 0x001000c4; | |
ae99258f | 1428 | vlv_dpio_write(dev_priv, DPIO_DATA_CHANNEL(port), val); |
89b667f8 | 1429 | |
ae99258f | 1430 | vlv_dpio_write(dev_priv, DPIO_PCS_CLOCKBUF0(port), |
89b667f8 | 1431 | 0x00760018); |
ae99258f | 1432 | vlv_dpio_write(dev_priv, DPIO_PCS_CLOCKBUF8(port), |
89b667f8 JB |
1433 | 0x00400888); |
1434 | } | |
1435 | } | |
1436 | ||
1437 | static void intel_dp_pre_pll_enable(struct intel_encoder *encoder) | |
1438 | { | |
1439 | struct intel_digital_port *dport = enc_to_dig_port(&encoder->base); | |
1440 | struct drm_device *dev = encoder->base.dev; | |
1441 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1442 | int port = vlv_dport_to_channel(dport); | |
1443 | ||
1444 | if (!IS_VALLEYVIEW(dev)) | |
1445 | return; | |
1446 | ||
89b667f8 | 1447 | /* Program Tx lane resets to default */ |
ae99258f | 1448 | vlv_dpio_write(dev_priv, DPIO_PCS_TX(port), |
89b667f8 JB |
1449 | DPIO_PCS_TX_LANE2_RESET | |
1450 | DPIO_PCS_TX_LANE1_RESET); | |
ae99258f | 1451 | vlv_dpio_write(dev_priv, DPIO_PCS_CLK(port), |
89b667f8 JB |
1452 | DPIO_PCS_CLK_CRI_RXEB_EIOS_EN | |
1453 | DPIO_PCS_CLK_CRI_RXDIGFILTSG_EN | | |
1454 | (1<<DPIO_PCS_CLK_DATAWIDTH_SHIFT) | | |
1455 | DPIO_PCS_CLK_SOFT_RESET); | |
1456 | ||
1457 | /* Fix up inter-pair skew failure */ | |
ae99258f JN |
1458 | vlv_dpio_write(dev_priv, DPIO_PCS_STAGGER1(port), 0x00750f00); |
1459 | vlv_dpio_write(dev_priv, DPIO_TX_CTL(port), 0x00001500); | |
1460 | vlv_dpio_write(dev_priv, DPIO_TX_LANE(port), 0x40400000); | |
a4fc5ed6 KP |
1461 | } |
1462 | ||
1463 | /* | |
df0c237d JB |
1464 | * Native read with retry for link status and receiver capability reads for |
1465 | * cases where the sink may still be asleep. | |
a4fc5ed6 KP |
1466 | */ |
1467 | static bool | |
df0c237d JB |
1468 | intel_dp_aux_native_read_retry(struct intel_dp *intel_dp, uint16_t address, |
1469 | uint8_t *recv, int recv_bytes) | |
a4fc5ed6 | 1470 | { |
61da5fab JB |
1471 | int ret, i; |
1472 | ||
df0c237d JB |
1473 | /* |
1474 | * Sinks are *supposed* to come up within 1ms from an off state, | |
1475 | * but we're also supposed to retry 3 times per the spec. | |
1476 | */ | |
61da5fab | 1477 | for (i = 0; i < 3; i++) { |
df0c237d JB |
1478 | ret = intel_dp_aux_native_read(intel_dp, address, recv, |
1479 | recv_bytes); | |
1480 | if (ret == recv_bytes) | |
61da5fab JB |
1481 | return true; |
1482 | msleep(1); | |
1483 | } | |
a4fc5ed6 | 1484 | |
61da5fab | 1485 | return false; |
a4fc5ed6 KP |
1486 | } |
1487 | ||
1488 | /* | |
1489 | * Fetch AUX CH registers 0x202 - 0x207 which contain | |
1490 | * link status information | |
1491 | */ | |
1492 | static bool | |
93f62dad | 1493 | intel_dp_get_link_status(struct intel_dp *intel_dp, uint8_t link_status[DP_LINK_STATUS_SIZE]) |
a4fc5ed6 | 1494 | { |
df0c237d JB |
1495 | return intel_dp_aux_native_read_retry(intel_dp, |
1496 | DP_LANE0_1_STATUS, | |
93f62dad | 1497 | link_status, |
df0c237d | 1498 | DP_LINK_STATUS_SIZE); |
a4fc5ed6 KP |
1499 | } |
1500 | ||
a4fc5ed6 KP |
1501 | #if 0 |
1502 | static char *voltage_names[] = { | |
1503 | "0.4V", "0.6V", "0.8V", "1.2V" | |
1504 | }; | |
1505 | static char *pre_emph_names[] = { | |
1506 | "0dB", "3.5dB", "6dB", "9.5dB" | |
1507 | }; | |
1508 | static char *link_train_names[] = { | |
1509 | "pattern 1", "pattern 2", "idle", "off" | |
1510 | }; | |
1511 | #endif | |
1512 | ||
1513 | /* | |
1514 | * These are source-specific values; current Intel hardware supports | |
1515 | * a maximum voltage of 800mV and a maximum pre-emphasis of 6dB | |
1516 | */ | |
a4fc5ed6 KP |
1517 | |
1518 | static uint8_t | |
1a2eb460 | 1519 | intel_dp_voltage_max(struct intel_dp *intel_dp) |
a4fc5ed6 | 1520 | { |
30add22d | 1521 | struct drm_device *dev = intel_dp_to_dev(intel_dp); |
bc7d38a4 | 1522 | enum port port = dp_to_dig_port(intel_dp)->port; |
1a2eb460 | 1523 | |
e2fa6fba P |
1524 | if (IS_VALLEYVIEW(dev)) |
1525 | return DP_TRAIN_VOLTAGE_SWING_1200; | |
bc7d38a4 | 1526 | else if (IS_GEN7(dev) && port == PORT_A) |
1a2eb460 | 1527 | return DP_TRAIN_VOLTAGE_SWING_800; |
bc7d38a4 | 1528 | else if (HAS_PCH_CPT(dev) && port != PORT_A) |
1a2eb460 KP |
1529 | return DP_TRAIN_VOLTAGE_SWING_1200; |
1530 | else | |
1531 | return DP_TRAIN_VOLTAGE_SWING_800; | |
1532 | } | |
1533 | ||
1534 | static uint8_t | |
1535 | intel_dp_pre_emphasis_max(struct intel_dp *intel_dp, uint8_t voltage_swing) | |
1536 | { | |
30add22d | 1537 | struct drm_device *dev = intel_dp_to_dev(intel_dp); |
bc7d38a4 | 1538 | enum port port = dp_to_dig_port(intel_dp)->port; |
1a2eb460 | 1539 | |
22b8bf17 | 1540 | if (HAS_DDI(dev)) { |
d6c0d722 PZ |
1541 | switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) { |
1542 | case DP_TRAIN_VOLTAGE_SWING_400: | |
1543 | return DP_TRAIN_PRE_EMPHASIS_9_5; | |
1544 | case DP_TRAIN_VOLTAGE_SWING_600: | |
1545 | return DP_TRAIN_PRE_EMPHASIS_6; | |
1546 | case DP_TRAIN_VOLTAGE_SWING_800: | |
1547 | return DP_TRAIN_PRE_EMPHASIS_3_5; | |
1548 | case DP_TRAIN_VOLTAGE_SWING_1200: | |
1549 | default: | |
1550 | return DP_TRAIN_PRE_EMPHASIS_0; | |
1551 | } | |
e2fa6fba P |
1552 | } else if (IS_VALLEYVIEW(dev)) { |
1553 | switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) { | |
1554 | case DP_TRAIN_VOLTAGE_SWING_400: | |
1555 | return DP_TRAIN_PRE_EMPHASIS_9_5; | |
1556 | case DP_TRAIN_VOLTAGE_SWING_600: | |
1557 | return DP_TRAIN_PRE_EMPHASIS_6; | |
1558 | case DP_TRAIN_VOLTAGE_SWING_800: | |
1559 | return DP_TRAIN_PRE_EMPHASIS_3_5; | |
1560 | case DP_TRAIN_VOLTAGE_SWING_1200: | |
1561 | default: | |
1562 | return DP_TRAIN_PRE_EMPHASIS_0; | |
1563 | } | |
bc7d38a4 | 1564 | } else if (IS_GEN7(dev) && port == PORT_A) { |
1a2eb460 KP |
1565 | switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) { |
1566 | case DP_TRAIN_VOLTAGE_SWING_400: | |
1567 | return DP_TRAIN_PRE_EMPHASIS_6; | |
1568 | case DP_TRAIN_VOLTAGE_SWING_600: | |
1569 | case DP_TRAIN_VOLTAGE_SWING_800: | |
1570 | return DP_TRAIN_PRE_EMPHASIS_3_5; | |
1571 | default: | |
1572 | return DP_TRAIN_PRE_EMPHASIS_0; | |
1573 | } | |
1574 | } else { | |
1575 | switch (voltage_swing & DP_TRAIN_VOLTAGE_SWING_MASK) { | |
1576 | case DP_TRAIN_VOLTAGE_SWING_400: | |
1577 | return DP_TRAIN_PRE_EMPHASIS_6; | |
1578 | case DP_TRAIN_VOLTAGE_SWING_600: | |
1579 | return DP_TRAIN_PRE_EMPHASIS_6; | |
1580 | case DP_TRAIN_VOLTAGE_SWING_800: | |
1581 | return DP_TRAIN_PRE_EMPHASIS_3_5; | |
1582 | case DP_TRAIN_VOLTAGE_SWING_1200: | |
1583 | default: | |
1584 | return DP_TRAIN_PRE_EMPHASIS_0; | |
1585 | } | |
a4fc5ed6 KP |
1586 | } |
1587 | } | |
1588 | ||
e2fa6fba P |
1589 | static uint32_t intel_vlv_signal_levels(struct intel_dp *intel_dp) |
1590 | { | |
1591 | struct drm_device *dev = intel_dp_to_dev(intel_dp); | |
1592 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1593 | struct intel_digital_port *dport = dp_to_dig_port(intel_dp); | |
1594 | unsigned long demph_reg_value, preemph_reg_value, | |
1595 | uniqtranscale_reg_value; | |
1596 | uint8_t train_set = intel_dp->train_set[0]; | |
cece5d58 | 1597 | int port = vlv_dport_to_channel(dport); |
e2fa6fba P |
1598 | |
1599 | switch (train_set & DP_TRAIN_PRE_EMPHASIS_MASK) { | |
1600 | case DP_TRAIN_PRE_EMPHASIS_0: | |
1601 | preemph_reg_value = 0x0004000; | |
1602 | switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) { | |
1603 | case DP_TRAIN_VOLTAGE_SWING_400: | |
1604 | demph_reg_value = 0x2B405555; | |
1605 | uniqtranscale_reg_value = 0x552AB83A; | |
1606 | break; | |
1607 | case DP_TRAIN_VOLTAGE_SWING_600: | |
1608 | demph_reg_value = 0x2B404040; | |
1609 | uniqtranscale_reg_value = 0x5548B83A; | |
1610 | break; | |
1611 | case DP_TRAIN_VOLTAGE_SWING_800: | |
1612 | demph_reg_value = 0x2B245555; | |
1613 | uniqtranscale_reg_value = 0x5560B83A; | |
1614 | break; | |
1615 | case DP_TRAIN_VOLTAGE_SWING_1200: | |
1616 | demph_reg_value = 0x2B405555; | |
1617 | uniqtranscale_reg_value = 0x5598DA3A; | |
1618 | break; | |
1619 | default: | |
1620 | return 0; | |
1621 | } | |
1622 | break; | |
1623 | case DP_TRAIN_PRE_EMPHASIS_3_5: | |
1624 | preemph_reg_value = 0x0002000; | |
1625 | switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) { | |
1626 | case DP_TRAIN_VOLTAGE_SWING_400: | |
1627 | demph_reg_value = 0x2B404040; | |
1628 | uniqtranscale_reg_value = 0x5552B83A; | |
1629 | break; | |
1630 | case DP_TRAIN_VOLTAGE_SWING_600: | |
1631 | demph_reg_value = 0x2B404848; | |
1632 | uniqtranscale_reg_value = 0x5580B83A; | |
1633 | break; | |
1634 | case DP_TRAIN_VOLTAGE_SWING_800: | |
1635 | demph_reg_value = 0x2B404040; | |
1636 | uniqtranscale_reg_value = 0x55ADDA3A; | |
1637 | break; | |
1638 | default: | |
1639 | return 0; | |
1640 | } | |
1641 | break; | |
1642 | case DP_TRAIN_PRE_EMPHASIS_6: | |
1643 | preemph_reg_value = 0x0000000; | |
1644 | switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) { | |
1645 | case DP_TRAIN_VOLTAGE_SWING_400: | |
1646 | demph_reg_value = 0x2B305555; | |
1647 | uniqtranscale_reg_value = 0x5570B83A; | |
1648 | break; | |
1649 | case DP_TRAIN_VOLTAGE_SWING_600: | |
1650 | demph_reg_value = 0x2B2B4040; | |
1651 | uniqtranscale_reg_value = 0x55ADDA3A; | |
1652 | break; | |
1653 | default: | |
1654 | return 0; | |
1655 | } | |
1656 | break; | |
1657 | case DP_TRAIN_PRE_EMPHASIS_9_5: | |
1658 | preemph_reg_value = 0x0006000; | |
1659 | switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) { | |
1660 | case DP_TRAIN_VOLTAGE_SWING_400: | |
1661 | demph_reg_value = 0x1B405555; | |
1662 | uniqtranscale_reg_value = 0x55ADDA3A; | |
1663 | break; | |
1664 | default: | |
1665 | return 0; | |
1666 | } | |
1667 | break; | |
1668 | default: | |
1669 | return 0; | |
1670 | } | |
1671 | ||
ae99258f JN |
1672 | vlv_dpio_write(dev_priv, DPIO_TX_OCALINIT(port), 0x00000000); |
1673 | vlv_dpio_write(dev_priv, DPIO_TX_SWING_CTL4(port), demph_reg_value); | |
1674 | vlv_dpio_write(dev_priv, DPIO_TX_SWING_CTL2(port), | |
e2fa6fba | 1675 | uniqtranscale_reg_value); |
ae99258f JN |
1676 | vlv_dpio_write(dev_priv, DPIO_TX_SWING_CTL3(port), 0x0C782040); |
1677 | vlv_dpio_write(dev_priv, DPIO_PCS_STAGGER0(port), 0x00030000); | |
1678 | vlv_dpio_write(dev_priv, DPIO_PCS_CTL_OVER1(port), preemph_reg_value); | |
1679 | vlv_dpio_write(dev_priv, DPIO_TX_OCALINIT(port), 0x80000000); | |
e2fa6fba P |
1680 | |
1681 | return 0; | |
1682 | } | |
1683 | ||
a4fc5ed6 | 1684 | static void |
93f62dad | 1685 | intel_get_adjust_train(struct intel_dp *intel_dp, uint8_t link_status[DP_LINK_STATUS_SIZE]) |
a4fc5ed6 KP |
1686 | { |
1687 | uint8_t v = 0; | |
1688 | uint8_t p = 0; | |
1689 | int lane; | |
1a2eb460 KP |
1690 | uint8_t voltage_max; |
1691 | uint8_t preemph_max; | |
a4fc5ed6 | 1692 | |
33a34e4e | 1693 | for (lane = 0; lane < intel_dp->lane_count; lane++) { |
0f037bde DV |
1694 | uint8_t this_v = drm_dp_get_adjust_request_voltage(link_status, lane); |
1695 | uint8_t this_p = drm_dp_get_adjust_request_pre_emphasis(link_status, lane); | |
a4fc5ed6 KP |
1696 | |
1697 | if (this_v > v) | |
1698 | v = this_v; | |
1699 | if (this_p > p) | |
1700 | p = this_p; | |
1701 | } | |
1702 | ||
1a2eb460 | 1703 | voltage_max = intel_dp_voltage_max(intel_dp); |
417e822d KP |
1704 | if (v >= voltage_max) |
1705 | v = voltage_max | DP_TRAIN_MAX_SWING_REACHED; | |
a4fc5ed6 | 1706 | |
1a2eb460 KP |
1707 | preemph_max = intel_dp_pre_emphasis_max(intel_dp, v); |
1708 | if (p >= preemph_max) | |
1709 | p = preemph_max | DP_TRAIN_MAX_PRE_EMPHASIS_REACHED; | |
a4fc5ed6 KP |
1710 | |
1711 | for (lane = 0; lane < 4; lane++) | |
33a34e4e | 1712 | intel_dp->train_set[lane] = v | p; |
a4fc5ed6 KP |
1713 | } |
1714 | ||
1715 | static uint32_t | |
f0a3424e | 1716 | intel_gen4_signal_levels(uint8_t train_set) |
a4fc5ed6 | 1717 | { |
3cf2efb1 | 1718 | uint32_t signal_levels = 0; |
a4fc5ed6 | 1719 | |
3cf2efb1 | 1720 | switch (train_set & DP_TRAIN_VOLTAGE_SWING_MASK) { |
a4fc5ed6 KP |
1721 | case DP_TRAIN_VOLTAGE_SWING_400: |
1722 | default: | |
1723 | signal_levels |= DP_VOLTAGE_0_4; | |
1724 | break; | |
1725 | case DP_TRAIN_VOLTAGE_SWING_600: | |
1726 | signal_levels |= DP_VOLTAGE_0_6; | |
1727 | break; | |
1728 | case DP_TRAIN_VOLTAGE_SWING_800: | |
1729 | signal_levels |= DP_VOLTAGE_0_8; | |
1730 | break; | |
1731 | case DP_TRAIN_VOLTAGE_SWING_1200: | |
1732 | signal_levels |= DP_VOLTAGE_1_2; | |
1733 | break; | |
1734 | } | |
3cf2efb1 | 1735 | switch (train_set & DP_TRAIN_PRE_EMPHASIS_MASK) { |
a4fc5ed6 KP |
1736 | case DP_TRAIN_PRE_EMPHASIS_0: |
1737 | default: | |
1738 | signal_levels |= DP_PRE_EMPHASIS_0; | |
1739 | break; | |
1740 | case DP_TRAIN_PRE_EMPHASIS_3_5: | |
1741 | signal_levels |= DP_PRE_EMPHASIS_3_5; | |
1742 | break; | |
1743 | case DP_TRAIN_PRE_EMPHASIS_6: | |
1744 | signal_levels |= DP_PRE_EMPHASIS_6; | |
1745 | break; | |
1746 | case DP_TRAIN_PRE_EMPHASIS_9_5: | |
1747 | signal_levels |= DP_PRE_EMPHASIS_9_5; | |
1748 | break; | |
1749 | } | |
1750 | return signal_levels; | |
1751 | } | |
1752 | ||
e3421a18 ZW |
1753 | /* Gen6's DP voltage swing and pre-emphasis control */ |
1754 | static uint32_t | |
1755 | intel_gen6_edp_signal_levels(uint8_t train_set) | |
1756 | { | |
3c5a62b5 YL |
1757 | int signal_levels = train_set & (DP_TRAIN_VOLTAGE_SWING_MASK | |
1758 | DP_TRAIN_PRE_EMPHASIS_MASK); | |
1759 | switch (signal_levels) { | |
e3421a18 | 1760 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_0: |
3c5a62b5 YL |
1761 | case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_0: |
1762 | return EDP_LINK_TRAIN_400_600MV_0DB_SNB_B; | |
1763 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_3_5: | |
1764 | return EDP_LINK_TRAIN_400MV_3_5DB_SNB_B; | |
e3421a18 | 1765 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_6: |
3c5a62b5 YL |
1766 | case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_6: |
1767 | return EDP_LINK_TRAIN_400_600MV_6DB_SNB_B; | |
e3421a18 | 1768 | case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_3_5: |
3c5a62b5 YL |
1769 | case DP_TRAIN_VOLTAGE_SWING_800 | DP_TRAIN_PRE_EMPHASIS_3_5: |
1770 | return EDP_LINK_TRAIN_600_800MV_3_5DB_SNB_B; | |
e3421a18 | 1771 | case DP_TRAIN_VOLTAGE_SWING_800 | DP_TRAIN_PRE_EMPHASIS_0: |
3c5a62b5 YL |
1772 | case DP_TRAIN_VOLTAGE_SWING_1200 | DP_TRAIN_PRE_EMPHASIS_0: |
1773 | return EDP_LINK_TRAIN_800_1200MV_0DB_SNB_B; | |
e3421a18 | 1774 | default: |
3c5a62b5 YL |
1775 | DRM_DEBUG_KMS("Unsupported voltage swing/pre-emphasis level:" |
1776 | "0x%x\n", signal_levels); | |
1777 | return EDP_LINK_TRAIN_400_600MV_0DB_SNB_B; | |
e3421a18 ZW |
1778 | } |
1779 | } | |
1780 | ||
1a2eb460 KP |
1781 | /* Gen7's DP voltage swing and pre-emphasis control */ |
1782 | static uint32_t | |
1783 | intel_gen7_edp_signal_levels(uint8_t train_set) | |
1784 | { | |
1785 | int signal_levels = train_set & (DP_TRAIN_VOLTAGE_SWING_MASK | | |
1786 | DP_TRAIN_PRE_EMPHASIS_MASK); | |
1787 | switch (signal_levels) { | |
1788 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_0: | |
1789 | return EDP_LINK_TRAIN_400MV_0DB_IVB; | |
1790 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_3_5: | |
1791 | return EDP_LINK_TRAIN_400MV_3_5DB_IVB; | |
1792 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_6: | |
1793 | return EDP_LINK_TRAIN_400MV_6DB_IVB; | |
1794 | ||
1795 | case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_0: | |
1796 | return EDP_LINK_TRAIN_600MV_0DB_IVB; | |
1797 | case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_3_5: | |
1798 | return EDP_LINK_TRAIN_600MV_3_5DB_IVB; | |
1799 | ||
1800 | case DP_TRAIN_VOLTAGE_SWING_800 | DP_TRAIN_PRE_EMPHASIS_0: | |
1801 | return EDP_LINK_TRAIN_800MV_0DB_IVB; | |
1802 | case DP_TRAIN_VOLTAGE_SWING_800 | DP_TRAIN_PRE_EMPHASIS_3_5: | |
1803 | return EDP_LINK_TRAIN_800MV_3_5DB_IVB; | |
1804 | ||
1805 | default: | |
1806 | DRM_DEBUG_KMS("Unsupported voltage swing/pre-emphasis level:" | |
1807 | "0x%x\n", signal_levels); | |
1808 | return EDP_LINK_TRAIN_500MV_0DB_IVB; | |
1809 | } | |
1810 | } | |
1811 | ||
d6c0d722 PZ |
1812 | /* Gen7.5's (HSW) DP voltage swing and pre-emphasis control */ |
1813 | static uint32_t | |
f0a3424e | 1814 | intel_hsw_signal_levels(uint8_t train_set) |
a4fc5ed6 | 1815 | { |
d6c0d722 PZ |
1816 | int signal_levels = train_set & (DP_TRAIN_VOLTAGE_SWING_MASK | |
1817 | DP_TRAIN_PRE_EMPHASIS_MASK); | |
1818 | switch (signal_levels) { | |
1819 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_0: | |
1820 | return DDI_BUF_EMP_400MV_0DB_HSW; | |
1821 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_3_5: | |
1822 | return DDI_BUF_EMP_400MV_3_5DB_HSW; | |
1823 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_6: | |
1824 | return DDI_BUF_EMP_400MV_6DB_HSW; | |
1825 | case DP_TRAIN_VOLTAGE_SWING_400 | DP_TRAIN_PRE_EMPHASIS_9_5: | |
1826 | return DDI_BUF_EMP_400MV_9_5DB_HSW; | |
a4fc5ed6 | 1827 | |
d6c0d722 PZ |
1828 | case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_0: |
1829 | return DDI_BUF_EMP_600MV_0DB_HSW; | |
1830 | case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_3_5: | |
1831 | return DDI_BUF_EMP_600MV_3_5DB_HSW; | |
1832 | case DP_TRAIN_VOLTAGE_SWING_600 | DP_TRAIN_PRE_EMPHASIS_6: | |
1833 | return DDI_BUF_EMP_600MV_6DB_HSW; | |
a4fc5ed6 | 1834 | |
d6c0d722 PZ |
1835 | case DP_TRAIN_VOLTAGE_SWING_800 | DP_TRAIN_PRE_EMPHASIS_0: |
1836 | return DDI_BUF_EMP_800MV_0DB_HSW; | |
1837 | case DP_TRAIN_VOLTAGE_SWING_800 | DP_TRAIN_PRE_EMPHASIS_3_5: | |
1838 | return DDI_BUF_EMP_800MV_3_5DB_HSW; | |
1839 | default: | |
1840 | DRM_DEBUG_KMS("Unsupported voltage swing/pre-emphasis level:" | |
1841 | "0x%x\n", signal_levels); | |
1842 | return DDI_BUF_EMP_400MV_0DB_HSW; | |
a4fc5ed6 | 1843 | } |
a4fc5ed6 KP |
1844 | } |
1845 | ||
f0a3424e PZ |
1846 | /* Properly updates "DP" with the correct signal levels. */ |
1847 | static void | |
1848 | intel_dp_set_signal_levels(struct intel_dp *intel_dp, uint32_t *DP) | |
1849 | { | |
1850 | struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp); | |
bc7d38a4 | 1851 | enum port port = intel_dig_port->port; |
f0a3424e PZ |
1852 | struct drm_device *dev = intel_dig_port->base.base.dev; |
1853 | uint32_t signal_levels, mask; | |
1854 | uint8_t train_set = intel_dp->train_set[0]; | |
1855 | ||
22b8bf17 | 1856 | if (HAS_DDI(dev)) { |
f0a3424e PZ |
1857 | signal_levels = intel_hsw_signal_levels(train_set); |
1858 | mask = DDI_BUF_EMP_MASK; | |
e2fa6fba P |
1859 | } else if (IS_VALLEYVIEW(dev)) { |
1860 | signal_levels = intel_vlv_signal_levels(intel_dp); | |
1861 | mask = 0; | |
bc7d38a4 | 1862 | } else if (IS_GEN7(dev) && port == PORT_A) { |
f0a3424e PZ |
1863 | signal_levels = intel_gen7_edp_signal_levels(train_set); |
1864 | mask = EDP_LINK_TRAIN_VOL_EMP_MASK_IVB; | |
bc7d38a4 | 1865 | } else if (IS_GEN6(dev) && port == PORT_A) { |
f0a3424e PZ |
1866 | signal_levels = intel_gen6_edp_signal_levels(train_set); |
1867 | mask = EDP_LINK_TRAIN_VOL_EMP_MASK_SNB; | |
1868 | } else { | |
1869 | signal_levels = intel_gen4_signal_levels(train_set); | |
1870 | mask = DP_VOLTAGE_MASK | DP_PRE_EMPHASIS_MASK; | |
1871 | } | |
1872 | ||
1873 | DRM_DEBUG_KMS("Using signal levels %08x\n", signal_levels); | |
1874 | ||
1875 | *DP = (*DP & ~mask) | signal_levels; | |
1876 | } | |
1877 | ||
a4fc5ed6 | 1878 | static bool |
ea5b213a | 1879 | intel_dp_set_link_train(struct intel_dp *intel_dp, |
a4fc5ed6 | 1880 | uint32_t dp_reg_value, |
58e10eb9 | 1881 | uint8_t dp_train_pat) |
a4fc5ed6 | 1882 | { |
174edf1f PZ |
1883 | struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp); |
1884 | struct drm_device *dev = intel_dig_port->base.base.dev; | |
a4fc5ed6 | 1885 | struct drm_i915_private *dev_priv = dev->dev_private; |
174edf1f | 1886 | enum port port = intel_dig_port->port; |
a4fc5ed6 KP |
1887 | int ret; |
1888 | ||
22b8bf17 | 1889 | if (HAS_DDI(dev)) { |
3ab9c637 | 1890 | uint32_t temp = I915_READ(DP_TP_CTL(port)); |
d6c0d722 PZ |
1891 | |
1892 | if (dp_train_pat & DP_LINK_SCRAMBLING_DISABLE) | |
1893 | temp |= DP_TP_CTL_SCRAMBLE_DISABLE; | |
1894 | else | |
1895 | temp &= ~DP_TP_CTL_SCRAMBLE_DISABLE; | |
1896 | ||
1897 | temp &= ~DP_TP_CTL_LINK_TRAIN_MASK; | |
1898 | switch (dp_train_pat & DP_TRAINING_PATTERN_MASK) { | |
1899 | case DP_TRAINING_PATTERN_DISABLE: | |
d6c0d722 PZ |
1900 | temp |= DP_TP_CTL_LINK_TRAIN_NORMAL; |
1901 | ||
1902 | break; | |
1903 | case DP_TRAINING_PATTERN_1: | |
1904 | temp |= DP_TP_CTL_LINK_TRAIN_PAT1; | |
1905 | break; | |
1906 | case DP_TRAINING_PATTERN_2: | |
1907 | temp |= DP_TP_CTL_LINK_TRAIN_PAT2; | |
1908 | break; | |
1909 | case DP_TRAINING_PATTERN_3: | |
1910 | temp |= DP_TP_CTL_LINK_TRAIN_PAT3; | |
1911 | break; | |
1912 | } | |
174edf1f | 1913 | I915_WRITE(DP_TP_CTL(port), temp); |
d6c0d722 | 1914 | |
bc7d38a4 | 1915 | } else if (HAS_PCH_CPT(dev) && (IS_GEN7(dev) || port != PORT_A)) { |
47ea7542 PZ |
1916 | dp_reg_value &= ~DP_LINK_TRAIN_MASK_CPT; |
1917 | ||
1918 | switch (dp_train_pat & DP_TRAINING_PATTERN_MASK) { | |
1919 | case DP_TRAINING_PATTERN_DISABLE: | |
1920 | dp_reg_value |= DP_LINK_TRAIN_OFF_CPT; | |
1921 | break; | |
1922 | case DP_TRAINING_PATTERN_1: | |
1923 | dp_reg_value |= DP_LINK_TRAIN_PAT_1_CPT; | |
1924 | break; | |
1925 | case DP_TRAINING_PATTERN_2: | |
1926 | dp_reg_value |= DP_LINK_TRAIN_PAT_2_CPT; | |
1927 | break; | |
1928 | case DP_TRAINING_PATTERN_3: | |
1929 | DRM_ERROR("DP training pattern 3 not supported\n"); | |
1930 | dp_reg_value |= DP_LINK_TRAIN_PAT_2_CPT; | |
1931 | break; | |
1932 | } | |
1933 | ||
1934 | } else { | |
1935 | dp_reg_value &= ~DP_LINK_TRAIN_MASK; | |
1936 | ||
1937 | switch (dp_train_pat & DP_TRAINING_PATTERN_MASK) { | |
1938 | case DP_TRAINING_PATTERN_DISABLE: | |
1939 | dp_reg_value |= DP_LINK_TRAIN_OFF; | |
1940 | break; | |
1941 | case DP_TRAINING_PATTERN_1: | |
1942 | dp_reg_value |= DP_LINK_TRAIN_PAT_1; | |
1943 | break; | |
1944 | case DP_TRAINING_PATTERN_2: | |
1945 | dp_reg_value |= DP_LINK_TRAIN_PAT_2; | |
1946 | break; | |
1947 | case DP_TRAINING_PATTERN_3: | |
1948 | DRM_ERROR("DP training pattern 3 not supported\n"); | |
1949 | dp_reg_value |= DP_LINK_TRAIN_PAT_2; | |
1950 | break; | |
1951 | } | |
1952 | } | |
1953 | ||
ea5b213a CW |
1954 | I915_WRITE(intel_dp->output_reg, dp_reg_value); |
1955 | POSTING_READ(intel_dp->output_reg); | |
a4fc5ed6 | 1956 | |
ea5b213a | 1957 | intel_dp_aux_native_write_1(intel_dp, |
a4fc5ed6 KP |
1958 | DP_TRAINING_PATTERN_SET, |
1959 | dp_train_pat); | |
1960 | ||
47ea7542 PZ |
1961 | if ((dp_train_pat & DP_TRAINING_PATTERN_MASK) != |
1962 | DP_TRAINING_PATTERN_DISABLE) { | |
1963 | ret = intel_dp_aux_native_write(intel_dp, | |
1964 | DP_TRAINING_LANE0_SET, | |
1965 | intel_dp->train_set, | |
1966 | intel_dp->lane_count); | |
1967 | if (ret != intel_dp->lane_count) | |
1968 | return false; | |
1969 | } | |
a4fc5ed6 KP |
1970 | |
1971 | return true; | |
1972 | } | |
1973 | ||
3ab9c637 ID |
1974 | static void intel_dp_set_idle_link_train(struct intel_dp *intel_dp) |
1975 | { | |
1976 | struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp); | |
1977 | struct drm_device *dev = intel_dig_port->base.base.dev; | |
1978 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1979 | enum port port = intel_dig_port->port; | |
1980 | uint32_t val; | |
1981 | ||
1982 | if (!HAS_DDI(dev)) | |
1983 | return; | |
1984 | ||
1985 | val = I915_READ(DP_TP_CTL(port)); | |
1986 | val &= ~DP_TP_CTL_LINK_TRAIN_MASK; | |
1987 | val |= DP_TP_CTL_LINK_TRAIN_IDLE; | |
1988 | I915_WRITE(DP_TP_CTL(port), val); | |
1989 | ||
1990 | /* | |
1991 | * On PORT_A we can have only eDP in SST mode. There the only reason | |
1992 | * we need to set idle transmission mode is to work around a HW issue | |
1993 | * where we enable the pipe while not in idle link-training mode. | |
1994 | * In this case there is requirement to wait for a minimum number of | |
1995 | * idle patterns to be sent. | |
1996 | */ | |
1997 | if (port == PORT_A) | |
1998 | return; | |
1999 | ||
2000 | if (wait_for((I915_READ(DP_TP_STATUS(port)) & DP_TP_STATUS_IDLE_DONE), | |
2001 | 1)) | |
2002 | DRM_ERROR("Timed out waiting for DP idle patterns\n"); | |
2003 | } | |
2004 | ||
33a34e4e | 2005 | /* Enable corresponding port and start training pattern 1 */ |
c19b0669 | 2006 | void |
33a34e4e | 2007 | intel_dp_start_link_train(struct intel_dp *intel_dp) |
a4fc5ed6 | 2008 | { |
da63a9f2 | 2009 | struct drm_encoder *encoder = &dp_to_dig_port(intel_dp)->base.base; |
c19b0669 | 2010 | struct drm_device *dev = encoder->dev; |
a4fc5ed6 KP |
2011 | int i; |
2012 | uint8_t voltage; | |
2013 | bool clock_recovery = false; | |
cdb0e95b | 2014 | int voltage_tries, loop_tries; |
ea5b213a | 2015 | uint32_t DP = intel_dp->DP; |
a4fc5ed6 | 2016 | |
affa9354 | 2017 | if (HAS_DDI(dev)) |
c19b0669 PZ |
2018 | intel_ddi_prepare_link_retrain(encoder); |
2019 | ||
3cf2efb1 CW |
2020 | /* Write the link configuration data */ |
2021 | intel_dp_aux_native_write(intel_dp, DP_LINK_BW_SET, | |
2022 | intel_dp->link_configuration, | |
2023 | DP_LINK_CONFIGURATION_SIZE); | |
a4fc5ed6 KP |
2024 | |
2025 | DP |= DP_PORT_EN; | |
1a2eb460 | 2026 | |
33a34e4e | 2027 | memset(intel_dp->train_set, 0, 4); |
a4fc5ed6 | 2028 | voltage = 0xff; |
cdb0e95b KP |
2029 | voltage_tries = 0; |
2030 | loop_tries = 0; | |
a4fc5ed6 KP |
2031 | clock_recovery = false; |
2032 | for (;;) { | |
33a34e4e | 2033 | /* Use intel_dp->train_set[0] to set the voltage and pre emphasis values */ |
93f62dad | 2034 | uint8_t link_status[DP_LINK_STATUS_SIZE]; |
f0a3424e PZ |
2035 | |
2036 | intel_dp_set_signal_levels(intel_dp, &DP); | |
a4fc5ed6 | 2037 | |
a7c9655f | 2038 | /* Set training pattern 1 */ |
47ea7542 | 2039 | if (!intel_dp_set_link_train(intel_dp, DP, |
81055854 AJ |
2040 | DP_TRAINING_PATTERN_1 | |
2041 | DP_LINK_SCRAMBLING_DISABLE)) | |
a4fc5ed6 | 2042 | break; |
a4fc5ed6 | 2043 | |
a7c9655f | 2044 | drm_dp_link_train_clock_recovery_delay(intel_dp->dpcd); |
93f62dad KP |
2045 | if (!intel_dp_get_link_status(intel_dp, link_status)) { |
2046 | DRM_ERROR("failed to get link status\n"); | |
a4fc5ed6 | 2047 | break; |
93f62dad | 2048 | } |
a4fc5ed6 | 2049 | |
01916270 | 2050 | if (drm_dp_clock_recovery_ok(link_status, intel_dp->lane_count)) { |
93f62dad | 2051 | DRM_DEBUG_KMS("clock recovery OK\n"); |
3cf2efb1 CW |
2052 | clock_recovery = true; |
2053 | break; | |
2054 | } | |
2055 | ||
2056 | /* Check to see if we've tried the max voltage */ | |
2057 | for (i = 0; i < intel_dp->lane_count; i++) | |
2058 | if ((intel_dp->train_set[i] & DP_TRAIN_MAX_SWING_REACHED) == 0) | |
a4fc5ed6 | 2059 | break; |
3b4f819d | 2060 | if (i == intel_dp->lane_count) { |
b06fbda3 DV |
2061 | ++loop_tries; |
2062 | if (loop_tries == 5) { | |
cdb0e95b KP |
2063 | DRM_DEBUG_KMS("too many full retries, give up\n"); |
2064 | break; | |
2065 | } | |
2066 | memset(intel_dp->train_set, 0, 4); | |
2067 | voltage_tries = 0; | |
2068 | continue; | |
2069 | } | |
a4fc5ed6 | 2070 | |
3cf2efb1 | 2071 | /* Check to see if we've tried the same voltage 5 times */ |
b06fbda3 | 2072 | if ((intel_dp->train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK) == voltage) { |
24773670 | 2073 | ++voltage_tries; |
b06fbda3 DV |
2074 | if (voltage_tries == 5) { |
2075 | DRM_DEBUG_KMS("too many voltage retries, give up\n"); | |
2076 | break; | |
2077 | } | |
2078 | } else | |
2079 | voltage_tries = 0; | |
2080 | voltage = intel_dp->train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK; | |
a4fc5ed6 | 2081 | |
3cf2efb1 | 2082 | /* Compute new intel_dp->train_set as requested by target */ |
93f62dad | 2083 | intel_get_adjust_train(intel_dp, link_status); |
a4fc5ed6 KP |
2084 | } |
2085 | ||
33a34e4e JB |
2086 | intel_dp->DP = DP; |
2087 | } | |
2088 | ||
c19b0669 | 2089 | void |
33a34e4e JB |
2090 | intel_dp_complete_link_train(struct intel_dp *intel_dp) |
2091 | { | |
33a34e4e | 2092 | bool channel_eq = false; |
37f80975 | 2093 | int tries, cr_tries; |
33a34e4e JB |
2094 | uint32_t DP = intel_dp->DP; |
2095 | ||
a4fc5ed6 KP |
2096 | /* channel equalization */ |
2097 | tries = 0; | |
37f80975 | 2098 | cr_tries = 0; |
a4fc5ed6 KP |
2099 | channel_eq = false; |
2100 | for (;;) { | |
93f62dad | 2101 | uint8_t link_status[DP_LINK_STATUS_SIZE]; |
e3421a18 | 2102 | |
37f80975 JB |
2103 | if (cr_tries > 5) { |
2104 | DRM_ERROR("failed to train DP, aborting\n"); | |
2105 | intel_dp_link_down(intel_dp); | |
2106 | break; | |
2107 | } | |
2108 | ||
f0a3424e | 2109 | intel_dp_set_signal_levels(intel_dp, &DP); |
e3421a18 | 2110 | |
a4fc5ed6 | 2111 | /* channel eq pattern */ |
47ea7542 | 2112 | if (!intel_dp_set_link_train(intel_dp, DP, |
81055854 AJ |
2113 | DP_TRAINING_PATTERN_2 | |
2114 | DP_LINK_SCRAMBLING_DISABLE)) | |
a4fc5ed6 KP |
2115 | break; |
2116 | ||
a7c9655f | 2117 | drm_dp_link_train_channel_eq_delay(intel_dp->dpcd); |
93f62dad | 2118 | if (!intel_dp_get_link_status(intel_dp, link_status)) |
a4fc5ed6 | 2119 | break; |
a4fc5ed6 | 2120 | |
37f80975 | 2121 | /* Make sure clock is still ok */ |
01916270 | 2122 | if (!drm_dp_clock_recovery_ok(link_status, intel_dp->lane_count)) { |
37f80975 JB |
2123 | intel_dp_start_link_train(intel_dp); |
2124 | cr_tries++; | |
2125 | continue; | |
2126 | } | |
2127 | ||
1ffdff13 | 2128 | if (drm_dp_channel_eq_ok(link_status, intel_dp->lane_count)) { |
3cf2efb1 CW |
2129 | channel_eq = true; |
2130 | break; | |
2131 | } | |
a4fc5ed6 | 2132 | |
37f80975 JB |
2133 | /* Try 5 times, then try clock recovery if that fails */ |
2134 | if (tries > 5) { | |
2135 | intel_dp_link_down(intel_dp); | |
2136 | intel_dp_start_link_train(intel_dp); | |
2137 | tries = 0; | |
2138 | cr_tries++; | |
2139 | continue; | |
2140 | } | |
a4fc5ed6 | 2141 | |
3cf2efb1 | 2142 | /* Compute new intel_dp->train_set as requested by target */ |
93f62dad | 2143 | intel_get_adjust_train(intel_dp, link_status); |
3cf2efb1 | 2144 | ++tries; |
869184a6 | 2145 | } |
3cf2efb1 | 2146 | |
3ab9c637 ID |
2147 | intel_dp_set_idle_link_train(intel_dp); |
2148 | ||
2149 | intel_dp->DP = DP; | |
2150 | ||
d6c0d722 | 2151 | if (channel_eq) |
07f42258 | 2152 | DRM_DEBUG_KMS("Channel EQ done. DP Training successful\n"); |
d6c0d722 | 2153 | |
3ab9c637 ID |
2154 | } |
2155 | ||
2156 | void intel_dp_stop_link_train(struct intel_dp *intel_dp) | |
2157 | { | |
2158 | intel_dp_set_link_train(intel_dp, intel_dp->DP, | |
2159 | DP_TRAINING_PATTERN_DISABLE); | |
a4fc5ed6 KP |
2160 | } |
2161 | ||
2162 | static void | |
ea5b213a | 2163 | intel_dp_link_down(struct intel_dp *intel_dp) |
a4fc5ed6 | 2164 | { |
da63a9f2 | 2165 | struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp); |
bc7d38a4 | 2166 | enum port port = intel_dig_port->port; |
da63a9f2 | 2167 | struct drm_device *dev = intel_dig_port->base.base.dev; |
a4fc5ed6 | 2168 | struct drm_i915_private *dev_priv = dev->dev_private; |
ab527efc DV |
2169 | struct intel_crtc *intel_crtc = |
2170 | to_intel_crtc(intel_dig_port->base.base.crtc); | |
ea5b213a | 2171 | uint32_t DP = intel_dp->DP; |
a4fc5ed6 | 2172 | |
c19b0669 PZ |
2173 | /* |
2174 | * DDI code has a strict mode set sequence and we should try to respect | |
2175 | * it, otherwise we might hang the machine in many different ways. So we | |
2176 | * really should be disabling the port only on a complete crtc_disable | |
2177 | * sequence. This function is just called under two conditions on DDI | |
2178 | * code: | |
2179 | * - Link train failed while doing crtc_enable, and on this case we | |
2180 | * really should respect the mode set sequence and wait for a | |
2181 | * crtc_disable. | |
2182 | * - Someone turned the monitor off and intel_dp_check_link_status | |
2183 | * called us. We don't need to disable the whole port on this case, so | |
2184 | * when someone turns the monitor on again, | |
2185 | * intel_ddi_prepare_link_retrain will take care of redoing the link | |
2186 | * train. | |
2187 | */ | |
affa9354 | 2188 | if (HAS_DDI(dev)) |
c19b0669 PZ |
2189 | return; |
2190 | ||
0c33d8d7 | 2191 | if (WARN_ON((I915_READ(intel_dp->output_reg) & DP_PORT_EN) == 0)) |
1b39d6f3 CW |
2192 | return; |
2193 | ||
28c97730 | 2194 | DRM_DEBUG_KMS("\n"); |
32f9d658 | 2195 | |
bc7d38a4 | 2196 | if (HAS_PCH_CPT(dev) && (IS_GEN7(dev) || port != PORT_A)) { |
e3421a18 | 2197 | DP &= ~DP_LINK_TRAIN_MASK_CPT; |
ea5b213a | 2198 | I915_WRITE(intel_dp->output_reg, DP | DP_LINK_TRAIN_PAT_IDLE_CPT); |
e3421a18 ZW |
2199 | } else { |
2200 | DP &= ~DP_LINK_TRAIN_MASK; | |
ea5b213a | 2201 | I915_WRITE(intel_dp->output_reg, DP | DP_LINK_TRAIN_PAT_IDLE); |
e3421a18 | 2202 | } |
fe255d00 | 2203 | POSTING_READ(intel_dp->output_reg); |
5eb08b69 | 2204 | |
ab527efc DV |
2205 | /* We don't really know why we're doing this */ |
2206 | intel_wait_for_vblank(dev, intel_crtc->pipe); | |
5eb08b69 | 2207 | |
493a7081 | 2208 | if (HAS_PCH_IBX(dev) && |
1b39d6f3 | 2209 | I915_READ(intel_dp->output_reg) & DP_PIPEB_SELECT) { |
da63a9f2 | 2210 | struct drm_crtc *crtc = intel_dig_port->base.base.crtc; |
31acbcc4 | 2211 | |
5bddd17f EA |
2212 | /* Hardware workaround: leaving our transcoder select |
2213 | * set to transcoder B while it's off will prevent the | |
2214 | * corresponding HDMI output on transcoder A. | |
2215 | * | |
2216 | * Combine this with another hardware workaround: | |
2217 | * transcoder select bit can only be cleared while the | |
2218 | * port is enabled. | |
2219 | */ | |
2220 | DP &= ~DP_PIPEB_SELECT; | |
2221 | I915_WRITE(intel_dp->output_reg, DP); | |
2222 | ||
2223 | /* Changes to enable or select take place the vblank | |
2224 | * after being written. | |
2225 | */ | |
ff50afe9 DV |
2226 | if (WARN_ON(crtc == NULL)) { |
2227 | /* We should never try to disable a port without a crtc | |
2228 | * attached. For paranoia keep the code around for a | |
2229 | * bit. */ | |
31acbcc4 CW |
2230 | POSTING_READ(intel_dp->output_reg); |
2231 | msleep(50); | |
2232 | } else | |
ab527efc | 2233 | intel_wait_for_vblank(dev, intel_crtc->pipe); |
5bddd17f EA |
2234 | } |
2235 | ||
832afda6 | 2236 | DP &= ~DP_AUDIO_OUTPUT_ENABLE; |
ea5b213a CW |
2237 | I915_WRITE(intel_dp->output_reg, DP & ~DP_PORT_EN); |
2238 | POSTING_READ(intel_dp->output_reg); | |
f01eca2e | 2239 | msleep(intel_dp->panel_power_down_delay); |
a4fc5ed6 KP |
2240 | } |
2241 | ||
26d61aad KP |
2242 | static bool |
2243 | intel_dp_get_dpcd(struct intel_dp *intel_dp) | |
92fd8fd1 | 2244 | { |
577c7a50 DL |
2245 | char dpcd_hex_dump[sizeof(intel_dp->dpcd) * 3]; |
2246 | ||
92fd8fd1 | 2247 | if (intel_dp_aux_native_read_retry(intel_dp, 0x000, intel_dp->dpcd, |
edb39244 AJ |
2248 | sizeof(intel_dp->dpcd)) == 0) |
2249 | return false; /* aux transfer failed */ | |
92fd8fd1 | 2250 | |
577c7a50 DL |
2251 | hex_dump_to_buffer(intel_dp->dpcd, sizeof(intel_dp->dpcd), |
2252 | 32, 1, dpcd_hex_dump, sizeof(dpcd_hex_dump), false); | |
2253 | DRM_DEBUG_KMS("DPCD: %s\n", dpcd_hex_dump); | |
2254 | ||
edb39244 AJ |
2255 | if (intel_dp->dpcd[DP_DPCD_REV] == 0) |
2256 | return false; /* DPCD not present */ | |
2257 | ||
2258 | if (!(intel_dp->dpcd[DP_DOWNSTREAMPORT_PRESENT] & | |
2259 | DP_DWN_STRM_PORT_PRESENT)) | |
2260 | return true; /* native DP sink */ | |
2261 | ||
2262 | if (intel_dp->dpcd[DP_DPCD_REV] == 0x10) | |
2263 | return true; /* no per-port downstream info */ | |
2264 | ||
2265 | if (intel_dp_aux_native_read_retry(intel_dp, DP_DOWNSTREAM_PORT_0, | |
2266 | intel_dp->downstream_ports, | |
2267 | DP_MAX_DOWNSTREAM_PORTS) == 0) | |
2268 | return false; /* downstream port status fetch failed */ | |
2269 | ||
2270 | return true; | |
92fd8fd1 KP |
2271 | } |
2272 | ||
0d198328 AJ |
2273 | static void |
2274 | intel_dp_probe_oui(struct intel_dp *intel_dp) | |
2275 | { | |
2276 | u8 buf[3]; | |
2277 | ||
2278 | if (!(intel_dp->dpcd[DP_DOWN_STREAM_PORT_COUNT] & DP_OUI_SUPPORT)) | |
2279 | return; | |
2280 | ||
351cfc34 DV |
2281 | ironlake_edp_panel_vdd_on(intel_dp); |
2282 | ||
0d198328 AJ |
2283 | if (intel_dp_aux_native_read_retry(intel_dp, DP_SINK_OUI, buf, 3)) |
2284 | DRM_DEBUG_KMS("Sink OUI: %02hx%02hx%02hx\n", | |
2285 | buf[0], buf[1], buf[2]); | |
2286 | ||
2287 | if (intel_dp_aux_native_read_retry(intel_dp, DP_BRANCH_OUI, buf, 3)) | |
2288 | DRM_DEBUG_KMS("Branch OUI: %02hx%02hx%02hx\n", | |
2289 | buf[0], buf[1], buf[2]); | |
351cfc34 DV |
2290 | |
2291 | ironlake_edp_panel_vdd_off(intel_dp, false); | |
0d198328 AJ |
2292 | } |
2293 | ||
a60f0e38 JB |
2294 | static bool |
2295 | intel_dp_get_sink_irq(struct intel_dp *intel_dp, u8 *sink_irq_vector) | |
2296 | { | |
2297 | int ret; | |
2298 | ||
2299 | ret = intel_dp_aux_native_read_retry(intel_dp, | |
2300 | DP_DEVICE_SERVICE_IRQ_VECTOR, | |
2301 | sink_irq_vector, 1); | |
2302 | if (!ret) | |
2303 | return false; | |
2304 | ||
2305 | return true; | |
2306 | } | |
2307 | ||
2308 | static void | |
2309 | intel_dp_handle_test_request(struct intel_dp *intel_dp) | |
2310 | { | |
2311 | /* NAK by default */ | |
9324cf7f | 2312 | intel_dp_aux_native_write_1(intel_dp, DP_TEST_RESPONSE, DP_TEST_NAK); |
a60f0e38 JB |
2313 | } |
2314 | ||
a4fc5ed6 KP |
2315 | /* |
2316 | * According to DP spec | |
2317 | * 5.1.2: | |
2318 | * 1. Read DPCD | |
2319 | * 2. Configure link according to Receiver Capabilities | |
2320 | * 3. Use Link Training from 2.5.3.3 and 3.5.1.3 | |
2321 | * 4. Check link status on receipt of hot-plug interrupt | |
2322 | */ | |
2323 | ||
00c09d70 | 2324 | void |
ea5b213a | 2325 | intel_dp_check_link_status(struct intel_dp *intel_dp) |
a4fc5ed6 | 2326 | { |
da63a9f2 | 2327 | struct intel_encoder *intel_encoder = &dp_to_dig_port(intel_dp)->base; |
a60f0e38 | 2328 | u8 sink_irq_vector; |
93f62dad | 2329 | u8 link_status[DP_LINK_STATUS_SIZE]; |
a60f0e38 | 2330 | |
da63a9f2 | 2331 | if (!intel_encoder->connectors_active) |
d2b996ac | 2332 | return; |
59cd09e1 | 2333 | |
da63a9f2 | 2334 | if (WARN_ON(!intel_encoder->base.crtc)) |
a4fc5ed6 KP |
2335 | return; |
2336 | ||
92fd8fd1 | 2337 | /* Try to read receiver status if the link appears to be up */ |
93f62dad | 2338 | if (!intel_dp_get_link_status(intel_dp, link_status)) { |
ea5b213a | 2339 | intel_dp_link_down(intel_dp); |
a4fc5ed6 KP |
2340 | return; |
2341 | } | |
2342 | ||
92fd8fd1 | 2343 | /* Now read the DPCD to see if it's actually running */ |
26d61aad | 2344 | if (!intel_dp_get_dpcd(intel_dp)) { |
59cd09e1 JB |
2345 | intel_dp_link_down(intel_dp); |
2346 | return; | |
2347 | } | |
2348 | ||
a60f0e38 JB |
2349 | /* Try to read the source of the interrupt */ |
2350 | if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11 && | |
2351 | intel_dp_get_sink_irq(intel_dp, &sink_irq_vector)) { | |
2352 | /* Clear interrupt source */ | |
2353 | intel_dp_aux_native_write_1(intel_dp, | |
2354 | DP_DEVICE_SERVICE_IRQ_VECTOR, | |
2355 | sink_irq_vector); | |
2356 | ||
2357 | if (sink_irq_vector & DP_AUTOMATED_TEST_REQUEST) | |
2358 | intel_dp_handle_test_request(intel_dp); | |
2359 | if (sink_irq_vector & (DP_CP_IRQ | DP_SINK_SPECIFIC_IRQ)) | |
2360 | DRM_DEBUG_DRIVER("CP or sink specific irq unhandled\n"); | |
2361 | } | |
2362 | ||
1ffdff13 | 2363 | if (!drm_dp_channel_eq_ok(link_status, intel_dp->lane_count)) { |
92fd8fd1 | 2364 | DRM_DEBUG_KMS("%s: channel EQ not ok, retraining\n", |
da63a9f2 | 2365 | drm_get_encoder_name(&intel_encoder->base)); |
33a34e4e JB |
2366 | intel_dp_start_link_train(intel_dp); |
2367 | intel_dp_complete_link_train(intel_dp); | |
3ab9c637 | 2368 | intel_dp_stop_link_train(intel_dp); |
33a34e4e | 2369 | } |
a4fc5ed6 | 2370 | } |
a4fc5ed6 | 2371 | |
caf9ab24 | 2372 | /* XXX this is probably wrong for multiple downstream ports */ |
71ba9000 | 2373 | static enum drm_connector_status |
26d61aad | 2374 | intel_dp_detect_dpcd(struct intel_dp *intel_dp) |
71ba9000 | 2375 | { |
caf9ab24 AJ |
2376 | uint8_t *dpcd = intel_dp->dpcd; |
2377 | bool hpd; | |
2378 | uint8_t type; | |
2379 | ||
2380 | if (!intel_dp_get_dpcd(intel_dp)) | |
2381 | return connector_status_disconnected; | |
2382 | ||
2383 | /* if there's no downstream port, we're done */ | |
2384 | if (!(dpcd[DP_DOWNSTREAMPORT_PRESENT] & DP_DWN_STRM_PORT_PRESENT)) | |
26d61aad | 2385 | return connector_status_connected; |
caf9ab24 AJ |
2386 | |
2387 | /* If we're HPD-aware, SINK_COUNT changes dynamically */ | |
2388 | hpd = !!(intel_dp->downstream_ports[0] & DP_DS_PORT_HPD); | |
2389 | if (hpd) { | |
23235177 | 2390 | uint8_t reg; |
caf9ab24 | 2391 | if (!intel_dp_aux_native_read_retry(intel_dp, DP_SINK_COUNT, |
23235177 | 2392 | ®, 1)) |
caf9ab24 | 2393 | return connector_status_unknown; |
23235177 AJ |
2394 | return DP_GET_SINK_COUNT(reg) ? connector_status_connected |
2395 | : connector_status_disconnected; | |
caf9ab24 AJ |
2396 | } |
2397 | ||
2398 | /* If no HPD, poke DDC gently */ | |
2399 | if (drm_probe_ddc(&intel_dp->adapter)) | |
26d61aad | 2400 | return connector_status_connected; |
caf9ab24 AJ |
2401 | |
2402 | /* Well we tried, say unknown for unreliable port types */ | |
2403 | type = intel_dp->downstream_ports[0] & DP_DS_PORT_TYPE_MASK; | |
2404 | if (type == DP_DS_PORT_TYPE_VGA || type == DP_DS_PORT_TYPE_NON_EDID) | |
2405 | return connector_status_unknown; | |
2406 | ||
2407 | /* Anything else is out of spec, warn and ignore */ | |
2408 | DRM_DEBUG_KMS("Broken DP branch device, ignoring\n"); | |
26d61aad | 2409 | return connector_status_disconnected; |
71ba9000 AJ |
2410 | } |
2411 | ||
5eb08b69 | 2412 | static enum drm_connector_status |
a9756bb5 | 2413 | ironlake_dp_detect(struct intel_dp *intel_dp) |
5eb08b69 | 2414 | { |
30add22d | 2415 | struct drm_device *dev = intel_dp_to_dev(intel_dp); |
1b469639 DL |
2416 | struct drm_i915_private *dev_priv = dev->dev_private; |
2417 | struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp); | |
5eb08b69 ZW |
2418 | enum drm_connector_status status; |
2419 | ||
fe16d949 CW |
2420 | /* Can't disconnect eDP, but you can close the lid... */ |
2421 | if (is_edp(intel_dp)) { | |
30add22d | 2422 | status = intel_panel_detect(dev); |
fe16d949 CW |
2423 | if (status == connector_status_unknown) |
2424 | status = connector_status_connected; | |
2425 | return status; | |
2426 | } | |
01cb9ea6 | 2427 | |
1b469639 DL |
2428 | if (!ibx_digital_port_connected(dev_priv, intel_dig_port)) |
2429 | return connector_status_disconnected; | |
2430 | ||
26d61aad | 2431 | return intel_dp_detect_dpcd(intel_dp); |
5eb08b69 ZW |
2432 | } |
2433 | ||
a4fc5ed6 | 2434 | static enum drm_connector_status |
a9756bb5 | 2435 | g4x_dp_detect(struct intel_dp *intel_dp) |
a4fc5ed6 | 2436 | { |
30add22d | 2437 | struct drm_device *dev = intel_dp_to_dev(intel_dp); |
a4fc5ed6 | 2438 | struct drm_i915_private *dev_priv = dev->dev_private; |
34f2be46 | 2439 | struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp); |
10f76a38 | 2440 | uint32_t bit; |
5eb08b69 | 2441 | |
35aad75f JB |
2442 | /* Can't disconnect eDP, but you can close the lid... */ |
2443 | if (is_edp(intel_dp)) { | |
2444 | enum drm_connector_status status; | |
2445 | ||
2446 | status = intel_panel_detect(dev); | |
2447 | if (status == connector_status_unknown) | |
2448 | status = connector_status_connected; | |
2449 | return status; | |
2450 | } | |
2451 | ||
34f2be46 VS |
2452 | switch (intel_dig_port->port) { |
2453 | case PORT_B: | |
26739f12 | 2454 | bit = PORTB_HOTPLUG_LIVE_STATUS; |
a4fc5ed6 | 2455 | break; |
34f2be46 | 2456 | case PORT_C: |
26739f12 | 2457 | bit = PORTC_HOTPLUG_LIVE_STATUS; |
a4fc5ed6 | 2458 | break; |
34f2be46 | 2459 | case PORT_D: |
26739f12 | 2460 | bit = PORTD_HOTPLUG_LIVE_STATUS; |
a4fc5ed6 KP |
2461 | break; |
2462 | default: | |
2463 | return connector_status_unknown; | |
2464 | } | |
2465 | ||
10f76a38 | 2466 | if ((I915_READ(PORT_HOTPLUG_STAT) & bit) == 0) |
a4fc5ed6 KP |
2467 | return connector_status_disconnected; |
2468 | ||
26d61aad | 2469 | return intel_dp_detect_dpcd(intel_dp); |
a9756bb5 ZW |
2470 | } |
2471 | ||
8c241fef KP |
2472 | static struct edid * |
2473 | intel_dp_get_edid(struct drm_connector *connector, struct i2c_adapter *adapter) | |
2474 | { | |
9cd300e0 | 2475 | struct intel_connector *intel_connector = to_intel_connector(connector); |
d6f24d0f | 2476 | |
9cd300e0 JN |
2477 | /* use cached edid if we have one */ |
2478 | if (intel_connector->edid) { | |
2479 | struct edid *edid; | |
2480 | int size; | |
2481 | ||
2482 | /* invalid edid */ | |
2483 | if (IS_ERR(intel_connector->edid)) | |
d6f24d0f JB |
2484 | return NULL; |
2485 | ||
9cd300e0 | 2486 | size = (intel_connector->edid->extensions + 1) * EDID_LENGTH; |
edbe1581 | 2487 | edid = kmemdup(intel_connector->edid, size, GFP_KERNEL); |
d6f24d0f JB |
2488 | if (!edid) |
2489 | return NULL; | |
2490 | ||
d6f24d0f JB |
2491 | return edid; |
2492 | } | |
8c241fef | 2493 | |
9cd300e0 | 2494 | return drm_get_edid(connector, adapter); |
8c241fef KP |
2495 | } |
2496 | ||
2497 | static int | |
2498 | intel_dp_get_edid_modes(struct drm_connector *connector, struct i2c_adapter *adapter) | |
2499 | { | |
9cd300e0 | 2500 | struct intel_connector *intel_connector = to_intel_connector(connector); |
8c241fef | 2501 | |
9cd300e0 JN |
2502 | /* use cached edid if we have one */ |
2503 | if (intel_connector->edid) { | |
2504 | /* invalid edid */ | |
2505 | if (IS_ERR(intel_connector->edid)) | |
2506 | return 0; | |
2507 | ||
2508 | return intel_connector_update_modes(connector, | |
2509 | intel_connector->edid); | |
d6f24d0f JB |
2510 | } |
2511 | ||
9cd300e0 | 2512 | return intel_ddc_get_modes(connector, adapter); |
8c241fef KP |
2513 | } |
2514 | ||
a9756bb5 ZW |
2515 | static enum drm_connector_status |
2516 | intel_dp_detect(struct drm_connector *connector, bool force) | |
2517 | { | |
2518 | struct intel_dp *intel_dp = intel_attached_dp(connector); | |
d63885da PZ |
2519 | struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp); |
2520 | struct intel_encoder *intel_encoder = &intel_dig_port->base; | |
fa90ecef | 2521 | struct drm_device *dev = connector->dev; |
a9756bb5 ZW |
2522 | enum drm_connector_status status; |
2523 | struct edid *edid = NULL; | |
2524 | ||
2525 | intel_dp->has_audio = false; | |
2526 | ||
2527 | if (HAS_PCH_SPLIT(dev)) | |
2528 | status = ironlake_dp_detect(intel_dp); | |
2529 | else | |
2530 | status = g4x_dp_detect(intel_dp); | |
1b9be9d0 | 2531 | |
a9756bb5 ZW |
2532 | if (status != connector_status_connected) |
2533 | return status; | |
2534 | ||
0d198328 AJ |
2535 | intel_dp_probe_oui(intel_dp); |
2536 | ||
c3e5f67b DV |
2537 | if (intel_dp->force_audio != HDMI_AUDIO_AUTO) { |
2538 | intel_dp->has_audio = (intel_dp->force_audio == HDMI_AUDIO_ON); | |
f684960e | 2539 | } else { |
8c241fef | 2540 | edid = intel_dp_get_edid(connector, &intel_dp->adapter); |
f684960e CW |
2541 | if (edid) { |
2542 | intel_dp->has_audio = drm_detect_monitor_audio(edid); | |
f684960e CW |
2543 | kfree(edid); |
2544 | } | |
a9756bb5 ZW |
2545 | } |
2546 | ||
d63885da PZ |
2547 | if (intel_encoder->type != INTEL_OUTPUT_EDP) |
2548 | intel_encoder->type = INTEL_OUTPUT_DISPLAYPORT; | |
a9756bb5 | 2549 | return connector_status_connected; |
a4fc5ed6 KP |
2550 | } |
2551 | ||
2552 | static int intel_dp_get_modes(struct drm_connector *connector) | |
2553 | { | |
df0e9248 | 2554 | struct intel_dp *intel_dp = intel_attached_dp(connector); |
dd06f90e | 2555 | struct intel_connector *intel_connector = to_intel_connector(connector); |
fa90ecef | 2556 | struct drm_device *dev = connector->dev; |
32f9d658 | 2557 | int ret; |
a4fc5ed6 KP |
2558 | |
2559 | /* We should parse the EDID data and find out if it has an audio sink | |
2560 | */ | |
2561 | ||
8c241fef | 2562 | ret = intel_dp_get_edid_modes(connector, &intel_dp->adapter); |
f8779fda | 2563 | if (ret) |
32f9d658 ZW |
2564 | return ret; |
2565 | ||
f8779fda | 2566 | /* if eDP has no EDID, fall back to fixed mode */ |
dd06f90e | 2567 | if (is_edp(intel_dp) && intel_connector->panel.fixed_mode) { |
f8779fda | 2568 | struct drm_display_mode *mode; |
dd06f90e JN |
2569 | mode = drm_mode_duplicate(dev, |
2570 | intel_connector->panel.fixed_mode); | |
f8779fda | 2571 | if (mode) { |
32f9d658 ZW |
2572 | drm_mode_probed_add(connector, mode); |
2573 | return 1; | |
2574 | } | |
2575 | } | |
2576 | return 0; | |
a4fc5ed6 KP |
2577 | } |
2578 | ||
1aad7ac0 CW |
2579 | static bool |
2580 | intel_dp_detect_audio(struct drm_connector *connector) | |
2581 | { | |
2582 | struct intel_dp *intel_dp = intel_attached_dp(connector); | |
2583 | struct edid *edid; | |
2584 | bool has_audio = false; | |
2585 | ||
8c241fef | 2586 | edid = intel_dp_get_edid(connector, &intel_dp->adapter); |
1aad7ac0 CW |
2587 | if (edid) { |
2588 | has_audio = drm_detect_monitor_audio(edid); | |
1aad7ac0 CW |
2589 | kfree(edid); |
2590 | } | |
2591 | ||
2592 | return has_audio; | |
2593 | } | |
2594 | ||
f684960e CW |
2595 | static int |
2596 | intel_dp_set_property(struct drm_connector *connector, | |
2597 | struct drm_property *property, | |
2598 | uint64_t val) | |
2599 | { | |
e953fd7b | 2600 | struct drm_i915_private *dev_priv = connector->dev->dev_private; |
53b41837 | 2601 | struct intel_connector *intel_connector = to_intel_connector(connector); |
da63a9f2 PZ |
2602 | struct intel_encoder *intel_encoder = intel_attached_encoder(connector); |
2603 | struct intel_dp *intel_dp = enc_to_intel_dp(&intel_encoder->base); | |
f684960e CW |
2604 | int ret; |
2605 | ||
662595df | 2606 | ret = drm_object_property_set_value(&connector->base, property, val); |
f684960e CW |
2607 | if (ret) |
2608 | return ret; | |
2609 | ||
3f43c48d | 2610 | if (property == dev_priv->force_audio_property) { |
1aad7ac0 CW |
2611 | int i = val; |
2612 | bool has_audio; | |
2613 | ||
2614 | if (i == intel_dp->force_audio) | |
f684960e CW |
2615 | return 0; |
2616 | ||
1aad7ac0 | 2617 | intel_dp->force_audio = i; |
f684960e | 2618 | |
c3e5f67b | 2619 | if (i == HDMI_AUDIO_AUTO) |
1aad7ac0 CW |
2620 | has_audio = intel_dp_detect_audio(connector); |
2621 | else | |
c3e5f67b | 2622 | has_audio = (i == HDMI_AUDIO_ON); |
1aad7ac0 CW |
2623 | |
2624 | if (has_audio == intel_dp->has_audio) | |
f684960e CW |
2625 | return 0; |
2626 | ||
1aad7ac0 | 2627 | intel_dp->has_audio = has_audio; |
f684960e CW |
2628 | goto done; |
2629 | } | |
2630 | ||
e953fd7b | 2631 | if (property == dev_priv->broadcast_rgb_property) { |
ae4edb80 DV |
2632 | bool old_auto = intel_dp->color_range_auto; |
2633 | uint32_t old_range = intel_dp->color_range; | |
2634 | ||
55bc60db VS |
2635 | switch (val) { |
2636 | case INTEL_BROADCAST_RGB_AUTO: | |
2637 | intel_dp->color_range_auto = true; | |
2638 | break; | |
2639 | case INTEL_BROADCAST_RGB_FULL: | |
2640 | intel_dp->color_range_auto = false; | |
2641 | intel_dp->color_range = 0; | |
2642 | break; | |
2643 | case INTEL_BROADCAST_RGB_LIMITED: | |
2644 | intel_dp->color_range_auto = false; | |
2645 | intel_dp->color_range = DP_COLOR_RANGE_16_235; | |
2646 | break; | |
2647 | default: | |
2648 | return -EINVAL; | |
2649 | } | |
ae4edb80 DV |
2650 | |
2651 | if (old_auto == intel_dp->color_range_auto && | |
2652 | old_range == intel_dp->color_range) | |
2653 | return 0; | |
2654 | ||
e953fd7b CW |
2655 | goto done; |
2656 | } | |
2657 | ||
53b41837 YN |
2658 | if (is_edp(intel_dp) && |
2659 | property == connector->dev->mode_config.scaling_mode_property) { | |
2660 | if (val == DRM_MODE_SCALE_NONE) { | |
2661 | DRM_DEBUG_KMS("no scaling not supported\n"); | |
2662 | return -EINVAL; | |
2663 | } | |
2664 | ||
2665 | if (intel_connector->panel.fitting_mode == val) { | |
2666 | /* the eDP scaling property is not changed */ | |
2667 | return 0; | |
2668 | } | |
2669 | intel_connector->panel.fitting_mode = val; | |
2670 | ||
2671 | goto done; | |
2672 | } | |
2673 | ||
f684960e CW |
2674 | return -EINVAL; |
2675 | ||
2676 | done: | |
c0c36b94 CW |
2677 | if (intel_encoder->base.crtc) |
2678 | intel_crtc_restore_mode(intel_encoder->base.crtc); | |
f684960e CW |
2679 | |
2680 | return 0; | |
2681 | } | |
2682 | ||
a4fc5ed6 | 2683 | static void |
0206e353 | 2684 | intel_dp_destroy(struct drm_connector *connector) |
a4fc5ed6 | 2685 | { |
be3cd5e3 | 2686 | struct intel_dp *intel_dp = intel_attached_dp(connector); |
1d508706 | 2687 | struct intel_connector *intel_connector = to_intel_connector(connector); |
aaa6fd2a | 2688 | |
9cd300e0 JN |
2689 | if (!IS_ERR_OR_NULL(intel_connector->edid)) |
2690 | kfree(intel_connector->edid); | |
2691 | ||
dc652f90 | 2692 | if (is_edp(intel_dp)) |
1d508706 | 2693 | intel_panel_fini(&intel_connector->panel); |
aaa6fd2a | 2694 | |
a4fc5ed6 KP |
2695 | drm_sysfs_connector_remove(connector); |
2696 | drm_connector_cleanup(connector); | |
55f78c43 | 2697 | kfree(connector); |
a4fc5ed6 KP |
2698 | } |
2699 | ||
00c09d70 | 2700 | void intel_dp_encoder_destroy(struct drm_encoder *encoder) |
24d05927 | 2701 | { |
da63a9f2 PZ |
2702 | struct intel_digital_port *intel_dig_port = enc_to_dig_port(encoder); |
2703 | struct intel_dp *intel_dp = &intel_dig_port->dp; | |
bd173813 | 2704 | struct drm_device *dev = intel_dp_to_dev(intel_dp); |
24d05927 DV |
2705 | |
2706 | i2c_del_adapter(&intel_dp->adapter); | |
2707 | drm_encoder_cleanup(encoder); | |
bd943159 KP |
2708 | if (is_edp(intel_dp)) { |
2709 | cancel_delayed_work_sync(&intel_dp->panel_vdd_work); | |
bd173813 | 2710 | mutex_lock(&dev->mode_config.mutex); |
bd943159 | 2711 | ironlake_panel_vdd_off_sync(intel_dp); |
bd173813 | 2712 | mutex_unlock(&dev->mode_config.mutex); |
bd943159 | 2713 | } |
da63a9f2 | 2714 | kfree(intel_dig_port); |
24d05927 DV |
2715 | } |
2716 | ||
a4fc5ed6 | 2717 | static const struct drm_encoder_helper_funcs intel_dp_helper_funcs = { |
a4fc5ed6 | 2718 | .mode_set = intel_dp_mode_set, |
a4fc5ed6 KP |
2719 | }; |
2720 | ||
2721 | static const struct drm_connector_funcs intel_dp_connector_funcs = { | |
2bd2ad64 | 2722 | .dpms = intel_connector_dpms, |
a4fc5ed6 KP |
2723 | .detect = intel_dp_detect, |
2724 | .fill_modes = drm_helper_probe_single_connector_modes, | |
f684960e | 2725 | .set_property = intel_dp_set_property, |
a4fc5ed6 KP |
2726 | .destroy = intel_dp_destroy, |
2727 | }; | |
2728 | ||
2729 | static const struct drm_connector_helper_funcs intel_dp_connector_helper_funcs = { | |
2730 | .get_modes = intel_dp_get_modes, | |
2731 | .mode_valid = intel_dp_mode_valid, | |
df0e9248 | 2732 | .best_encoder = intel_best_encoder, |
a4fc5ed6 KP |
2733 | }; |
2734 | ||
a4fc5ed6 | 2735 | static const struct drm_encoder_funcs intel_dp_enc_funcs = { |
24d05927 | 2736 | .destroy = intel_dp_encoder_destroy, |
a4fc5ed6 KP |
2737 | }; |
2738 | ||
995b6762 | 2739 | static void |
21d40d37 | 2740 | intel_dp_hot_plug(struct intel_encoder *intel_encoder) |
c8110e52 | 2741 | { |
fa90ecef | 2742 | struct intel_dp *intel_dp = enc_to_intel_dp(&intel_encoder->base); |
c8110e52 | 2743 | |
885a5014 | 2744 | intel_dp_check_link_status(intel_dp); |
c8110e52 | 2745 | } |
6207937d | 2746 | |
e3421a18 ZW |
2747 | /* Return which DP Port should be selected for Transcoder DP control */ |
2748 | int | |
0206e353 | 2749 | intel_trans_dp_port_sel(struct drm_crtc *crtc) |
e3421a18 ZW |
2750 | { |
2751 | struct drm_device *dev = crtc->dev; | |
fa90ecef PZ |
2752 | struct intel_encoder *intel_encoder; |
2753 | struct intel_dp *intel_dp; | |
e3421a18 | 2754 | |
fa90ecef PZ |
2755 | for_each_encoder_on_crtc(dev, crtc, intel_encoder) { |
2756 | intel_dp = enc_to_intel_dp(&intel_encoder->base); | |
e3421a18 | 2757 | |
fa90ecef PZ |
2758 | if (intel_encoder->type == INTEL_OUTPUT_DISPLAYPORT || |
2759 | intel_encoder->type == INTEL_OUTPUT_EDP) | |
ea5b213a | 2760 | return intel_dp->output_reg; |
e3421a18 | 2761 | } |
ea5b213a | 2762 | |
e3421a18 ZW |
2763 | return -1; |
2764 | } | |
2765 | ||
36e83a18 | 2766 | /* check the VBT to see whether the eDP is on DP-D port */ |
cb0953d7 | 2767 | bool intel_dpd_is_edp(struct drm_device *dev) |
36e83a18 ZY |
2768 | { |
2769 | struct drm_i915_private *dev_priv = dev->dev_private; | |
2770 | struct child_device_config *p_child; | |
2771 | int i; | |
2772 | ||
41aa3448 | 2773 | if (!dev_priv->vbt.child_dev_num) |
36e83a18 ZY |
2774 | return false; |
2775 | ||
41aa3448 RV |
2776 | for (i = 0; i < dev_priv->vbt.child_dev_num; i++) { |
2777 | p_child = dev_priv->vbt.child_dev + i; | |
36e83a18 ZY |
2778 | |
2779 | if (p_child->dvo_port == PORT_IDPD && | |
2780 | p_child->device_type == DEVICE_TYPE_eDP) | |
2781 | return true; | |
2782 | } | |
2783 | return false; | |
2784 | } | |
2785 | ||
f684960e CW |
2786 | static void |
2787 | intel_dp_add_properties(struct intel_dp *intel_dp, struct drm_connector *connector) | |
2788 | { | |
53b41837 YN |
2789 | struct intel_connector *intel_connector = to_intel_connector(connector); |
2790 | ||
3f43c48d | 2791 | intel_attach_force_audio_property(connector); |
e953fd7b | 2792 | intel_attach_broadcast_rgb_property(connector); |
55bc60db | 2793 | intel_dp->color_range_auto = true; |
53b41837 YN |
2794 | |
2795 | if (is_edp(intel_dp)) { | |
2796 | drm_mode_create_scaling_mode_property(connector->dev); | |
6de6d846 RC |
2797 | drm_object_attach_property( |
2798 | &connector->base, | |
53b41837 | 2799 | connector->dev->mode_config.scaling_mode_property, |
8e740cd1 YN |
2800 | DRM_MODE_SCALE_ASPECT); |
2801 | intel_connector->panel.fitting_mode = DRM_MODE_SCALE_ASPECT; | |
53b41837 | 2802 | } |
f684960e CW |
2803 | } |
2804 | ||
67a54566 DV |
2805 | static void |
2806 | intel_dp_init_panel_power_sequencer(struct drm_device *dev, | |
f30d26e4 JN |
2807 | struct intel_dp *intel_dp, |
2808 | struct edp_power_seq *out) | |
67a54566 DV |
2809 | { |
2810 | struct drm_i915_private *dev_priv = dev->dev_private; | |
2811 | struct edp_power_seq cur, vbt, spec, final; | |
2812 | u32 pp_on, pp_off, pp_div, pp; | |
453c5420 JB |
2813 | int pp_control_reg, pp_on_reg, pp_off_reg, pp_div_reg; |
2814 | ||
2815 | if (HAS_PCH_SPLIT(dev)) { | |
2816 | pp_control_reg = PCH_PP_CONTROL; | |
2817 | pp_on_reg = PCH_PP_ON_DELAYS; | |
2818 | pp_off_reg = PCH_PP_OFF_DELAYS; | |
2819 | pp_div_reg = PCH_PP_DIVISOR; | |
2820 | } else { | |
2821 | pp_control_reg = PIPEA_PP_CONTROL; | |
2822 | pp_on_reg = PIPEA_PP_ON_DELAYS; | |
2823 | pp_off_reg = PIPEA_PP_OFF_DELAYS; | |
2824 | pp_div_reg = PIPEA_PP_DIVISOR; | |
2825 | } | |
67a54566 DV |
2826 | |
2827 | /* Workaround: Need to write PP_CONTROL with the unlock key as | |
2828 | * the very first thing. */ | |
453c5420 JB |
2829 | pp = ironlake_get_pp_control(intel_dp); |
2830 | I915_WRITE(pp_control_reg, pp); | |
67a54566 | 2831 | |
453c5420 JB |
2832 | pp_on = I915_READ(pp_on_reg); |
2833 | pp_off = I915_READ(pp_off_reg); | |
2834 | pp_div = I915_READ(pp_div_reg); | |
67a54566 DV |
2835 | |
2836 | /* Pull timing values out of registers */ | |
2837 | cur.t1_t3 = (pp_on & PANEL_POWER_UP_DELAY_MASK) >> | |
2838 | PANEL_POWER_UP_DELAY_SHIFT; | |
2839 | ||
2840 | cur.t8 = (pp_on & PANEL_LIGHT_ON_DELAY_MASK) >> | |
2841 | PANEL_LIGHT_ON_DELAY_SHIFT; | |
2842 | ||
2843 | cur.t9 = (pp_off & PANEL_LIGHT_OFF_DELAY_MASK) >> | |
2844 | PANEL_LIGHT_OFF_DELAY_SHIFT; | |
2845 | ||
2846 | cur.t10 = (pp_off & PANEL_POWER_DOWN_DELAY_MASK) >> | |
2847 | PANEL_POWER_DOWN_DELAY_SHIFT; | |
2848 | ||
2849 | cur.t11_t12 = ((pp_div & PANEL_POWER_CYCLE_DELAY_MASK) >> | |
2850 | PANEL_POWER_CYCLE_DELAY_SHIFT) * 1000; | |
2851 | ||
2852 | DRM_DEBUG_KMS("cur t1_t3 %d t8 %d t9 %d t10 %d t11_t12 %d\n", | |
2853 | cur.t1_t3, cur.t8, cur.t9, cur.t10, cur.t11_t12); | |
2854 | ||
41aa3448 | 2855 | vbt = dev_priv->vbt.edp_pps; |
67a54566 DV |
2856 | |
2857 | /* Upper limits from eDP 1.3 spec. Note that we use the clunky units of | |
2858 | * our hw here, which are all in 100usec. */ | |
2859 | spec.t1_t3 = 210 * 10; | |
2860 | spec.t8 = 50 * 10; /* no limit for t8, use t7 instead */ | |
2861 | spec.t9 = 50 * 10; /* no limit for t9, make it symmetric with t8 */ | |
2862 | spec.t10 = 500 * 10; | |
2863 | /* This one is special and actually in units of 100ms, but zero | |
2864 | * based in the hw (so we need to add 100 ms). But the sw vbt | |
2865 | * table multiplies it with 1000 to make it in units of 100usec, | |
2866 | * too. */ | |
2867 | spec.t11_t12 = (510 + 100) * 10; | |
2868 | ||
2869 | DRM_DEBUG_KMS("vbt t1_t3 %d t8 %d t9 %d t10 %d t11_t12 %d\n", | |
2870 | vbt.t1_t3, vbt.t8, vbt.t9, vbt.t10, vbt.t11_t12); | |
2871 | ||
2872 | /* Use the max of the register settings and vbt. If both are | |
2873 | * unset, fall back to the spec limits. */ | |
2874 | #define assign_final(field) final.field = (max(cur.field, vbt.field) == 0 ? \ | |
2875 | spec.field : \ | |
2876 | max(cur.field, vbt.field)) | |
2877 | assign_final(t1_t3); | |
2878 | assign_final(t8); | |
2879 | assign_final(t9); | |
2880 | assign_final(t10); | |
2881 | assign_final(t11_t12); | |
2882 | #undef assign_final | |
2883 | ||
2884 | #define get_delay(field) (DIV_ROUND_UP(final.field, 10)) | |
2885 | intel_dp->panel_power_up_delay = get_delay(t1_t3); | |
2886 | intel_dp->backlight_on_delay = get_delay(t8); | |
2887 | intel_dp->backlight_off_delay = get_delay(t9); | |
2888 | intel_dp->panel_power_down_delay = get_delay(t10); | |
2889 | intel_dp->panel_power_cycle_delay = get_delay(t11_t12); | |
2890 | #undef get_delay | |
2891 | ||
f30d26e4 JN |
2892 | DRM_DEBUG_KMS("panel power up delay %d, power down delay %d, power cycle delay %d\n", |
2893 | intel_dp->panel_power_up_delay, intel_dp->panel_power_down_delay, | |
2894 | intel_dp->panel_power_cycle_delay); | |
2895 | ||
2896 | DRM_DEBUG_KMS("backlight on delay %d, off delay %d\n", | |
2897 | intel_dp->backlight_on_delay, intel_dp->backlight_off_delay); | |
2898 | ||
2899 | if (out) | |
2900 | *out = final; | |
2901 | } | |
2902 | ||
2903 | static void | |
2904 | intel_dp_init_panel_power_sequencer_registers(struct drm_device *dev, | |
2905 | struct intel_dp *intel_dp, | |
2906 | struct edp_power_seq *seq) | |
2907 | { | |
2908 | struct drm_i915_private *dev_priv = dev->dev_private; | |
453c5420 JB |
2909 | u32 pp_on, pp_off, pp_div, port_sel = 0; |
2910 | int div = HAS_PCH_SPLIT(dev) ? intel_pch_rawclk(dev) : intel_hrawclk(dev); | |
2911 | int pp_on_reg, pp_off_reg, pp_div_reg; | |
2912 | ||
2913 | if (HAS_PCH_SPLIT(dev)) { | |
2914 | pp_on_reg = PCH_PP_ON_DELAYS; | |
2915 | pp_off_reg = PCH_PP_OFF_DELAYS; | |
2916 | pp_div_reg = PCH_PP_DIVISOR; | |
2917 | } else { | |
2918 | pp_on_reg = PIPEA_PP_ON_DELAYS; | |
2919 | pp_off_reg = PIPEA_PP_OFF_DELAYS; | |
2920 | pp_div_reg = PIPEA_PP_DIVISOR; | |
2921 | } | |
2922 | ||
67a54566 | 2923 | /* And finally store the new values in the power sequencer. */ |
f30d26e4 JN |
2924 | pp_on = (seq->t1_t3 << PANEL_POWER_UP_DELAY_SHIFT) | |
2925 | (seq->t8 << PANEL_LIGHT_ON_DELAY_SHIFT); | |
2926 | pp_off = (seq->t9 << PANEL_LIGHT_OFF_DELAY_SHIFT) | | |
2927 | (seq->t10 << PANEL_POWER_DOWN_DELAY_SHIFT); | |
67a54566 DV |
2928 | /* Compute the divisor for the pp clock, simply match the Bspec |
2929 | * formula. */ | |
453c5420 | 2930 | pp_div = ((100 * div)/2 - 1) << PP_REFERENCE_DIVIDER_SHIFT; |
f30d26e4 | 2931 | pp_div |= (DIV_ROUND_UP(seq->t11_t12, 1000) |
67a54566 DV |
2932 | << PANEL_POWER_CYCLE_DELAY_SHIFT); |
2933 | ||
2934 | /* Haswell doesn't have any port selection bits for the panel | |
2935 | * power sequencer any more. */ | |
bc7d38a4 ID |
2936 | if (IS_VALLEYVIEW(dev)) { |
2937 | port_sel = I915_READ(pp_on_reg) & 0xc0000000; | |
2938 | } else if (HAS_PCH_IBX(dev) || HAS_PCH_CPT(dev)) { | |
2939 | if (dp_to_dig_port(intel_dp)->port == PORT_A) | |
453c5420 | 2940 | port_sel = PANEL_POWER_PORT_DP_A; |
67a54566 | 2941 | else |
453c5420 | 2942 | port_sel = PANEL_POWER_PORT_DP_D; |
67a54566 DV |
2943 | } |
2944 | ||
453c5420 JB |
2945 | pp_on |= port_sel; |
2946 | ||
2947 | I915_WRITE(pp_on_reg, pp_on); | |
2948 | I915_WRITE(pp_off_reg, pp_off); | |
2949 | I915_WRITE(pp_div_reg, pp_div); | |
67a54566 | 2950 | |
67a54566 | 2951 | DRM_DEBUG_KMS("panel power sequencer register settings: PP_ON %#x, PP_OFF %#x, PP_DIV %#x\n", |
453c5420 JB |
2952 | I915_READ(pp_on_reg), |
2953 | I915_READ(pp_off_reg), | |
2954 | I915_READ(pp_div_reg)); | |
f684960e CW |
2955 | } |
2956 | ||
a4fc5ed6 | 2957 | void |
f0fec3f2 PZ |
2958 | intel_dp_init_connector(struct intel_digital_port *intel_dig_port, |
2959 | struct intel_connector *intel_connector) | |
a4fc5ed6 | 2960 | { |
f0fec3f2 PZ |
2961 | struct drm_connector *connector = &intel_connector->base; |
2962 | struct intel_dp *intel_dp = &intel_dig_port->dp; | |
2963 | struct intel_encoder *intel_encoder = &intel_dig_port->base; | |
2964 | struct drm_device *dev = intel_encoder->base.dev; | |
a4fc5ed6 | 2965 | struct drm_i915_private *dev_priv = dev->dev_private; |
f8779fda | 2966 | struct drm_display_mode *fixed_mode = NULL; |
f30d26e4 | 2967 | struct edp_power_seq power_seq = { 0 }; |
174edf1f | 2968 | enum port port = intel_dig_port->port; |
5eb08b69 | 2969 | const char *name = NULL; |
b329530c | 2970 | int type; |
a4fc5ed6 | 2971 | |
0767935e DV |
2972 | /* Preserve the current hw state. */ |
2973 | intel_dp->DP = I915_READ(intel_dp->output_reg); | |
dd06f90e | 2974 | intel_dp->attached_connector = intel_connector; |
3d3dc149 | 2975 | |
f7d24902 | 2976 | type = DRM_MODE_CONNECTOR_DisplayPort; |
19c03924 GB |
2977 | /* |
2978 | * FIXME : We need to initialize built-in panels before external panels. | |
2979 | * For X0, DP_C is fixed as eDP. Revisit this as part of VLV eDP cleanup | |
2980 | */ | |
f7d24902 ID |
2981 | switch (port) { |
2982 | case PORT_A: | |
19c03924 | 2983 | type = DRM_MODE_CONNECTOR_eDP; |
f7d24902 ID |
2984 | break; |
2985 | case PORT_C: | |
2986 | if (IS_VALLEYVIEW(dev)) | |
2987 | type = DRM_MODE_CONNECTOR_eDP; | |
2988 | break; | |
2989 | case PORT_D: | |
2990 | if (HAS_PCH_SPLIT(dev) && intel_dpd_is_edp(dev)) | |
2991 | type = DRM_MODE_CONNECTOR_eDP; | |
2992 | break; | |
2993 | default: /* silence GCC warning */ | |
2994 | break; | |
b329530c AJ |
2995 | } |
2996 | ||
f7d24902 ID |
2997 | /* |
2998 | * For eDP we always set the encoder type to INTEL_OUTPUT_EDP, but | |
2999 | * for DP the encoder type can be set by the caller to | |
3000 | * INTEL_OUTPUT_UNKNOWN for DDI, so don't rewrite it. | |
3001 | */ | |
3002 | if (type == DRM_MODE_CONNECTOR_eDP) | |
3003 | intel_encoder->type = INTEL_OUTPUT_EDP; | |
3004 | ||
e7281eab ID |
3005 | DRM_DEBUG_KMS("Adding %s connector on port %c\n", |
3006 | type == DRM_MODE_CONNECTOR_eDP ? "eDP" : "DP", | |
3007 | port_name(port)); | |
3008 | ||
b329530c | 3009 | drm_connector_init(dev, connector, &intel_dp_connector_funcs, type); |
a4fc5ed6 KP |
3010 | drm_connector_helper_add(connector, &intel_dp_connector_helper_funcs); |
3011 | ||
a4fc5ed6 KP |
3012 | connector->interlace_allowed = true; |
3013 | connector->doublescan_allowed = 0; | |
3014 | ||
f0fec3f2 PZ |
3015 | INIT_DELAYED_WORK(&intel_dp->panel_vdd_work, |
3016 | ironlake_panel_vdd_work); | |
a4fc5ed6 | 3017 | |
df0e9248 | 3018 | intel_connector_attach_encoder(intel_connector, intel_encoder); |
a4fc5ed6 KP |
3019 | drm_sysfs_connector_add(connector); |
3020 | ||
affa9354 | 3021 | if (HAS_DDI(dev)) |
bcbc889b PZ |
3022 | intel_connector->get_hw_state = intel_ddi_connector_get_hw_state; |
3023 | else | |
3024 | intel_connector->get_hw_state = intel_connector_get_hw_state; | |
3025 | ||
9ed35ab1 PZ |
3026 | intel_dp->aux_ch_ctl_reg = intel_dp->output_reg + 0x10; |
3027 | if (HAS_DDI(dev)) { | |
3028 | switch (intel_dig_port->port) { | |
3029 | case PORT_A: | |
3030 | intel_dp->aux_ch_ctl_reg = DPA_AUX_CH_CTL; | |
3031 | break; | |
3032 | case PORT_B: | |
3033 | intel_dp->aux_ch_ctl_reg = PCH_DPB_AUX_CH_CTL; | |
3034 | break; | |
3035 | case PORT_C: | |
3036 | intel_dp->aux_ch_ctl_reg = PCH_DPC_AUX_CH_CTL; | |
3037 | break; | |
3038 | case PORT_D: | |
3039 | intel_dp->aux_ch_ctl_reg = PCH_DPD_AUX_CH_CTL; | |
3040 | break; | |
3041 | default: | |
3042 | BUG(); | |
3043 | } | |
3044 | } | |
e8cb4558 | 3045 | |
a4fc5ed6 | 3046 | /* Set up the DDC bus. */ |
ab9d7c30 PZ |
3047 | switch (port) { |
3048 | case PORT_A: | |
1d843f9d | 3049 | intel_encoder->hpd_pin = HPD_PORT_A; |
ab9d7c30 PZ |
3050 | name = "DPDDC-A"; |
3051 | break; | |
3052 | case PORT_B: | |
1d843f9d | 3053 | intel_encoder->hpd_pin = HPD_PORT_B; |
ab9d7c30 PZ |
3054 | name = "DPDDC-B"; |
3055 | break; | |
3056 | case PORT_C: | |
1d843f9d | 3057 | intel_encoder->hpd_pin = HPD_PORT_C; |
ab9d7c30 PZ |
3058 | name = "DPDDC-C"; |
3059 | break; | |
3060 | case PORT_D: | |
1d843f9d | 3061 | intel_encoder->hpd_pin = HPD_PORT_D; |
ab9d7c30 PZ |
3062 | name = "DPDDC-D"; |
3063 | break; | |
3064 | default: | |
ad1c0b19 | 3065 | BUG(); |
5eb08b69 ZW |
3066 | } |
3067 | ||
67a54566 | 3068 | if (is_edp(intel_dp)) |
f30d26e4 | 3069 | intel_dp_init_panel_power_sequencer(dev, intel_dp, &power_seq); |
c1f05264 DA |
3070 | |
3071 | intel_dp_i2c_init(intel_dp, intel_connector, name); | |
3072 | ||
67a54566 | 3073 | /* Cache DPCD and EDID for edp. */ |
c1f05264 DA |
3074 | if (is_edp(intel_dp)) { |
3075 | bool ret; | |
f8779fda | 3076 | struct drm_display_mode *scan; |
c1f05264 | 3077 | struct edid *edid; |
5d613501 JB |
3078 | |
3079 | ironlake_edp_panel_vdd_on(intel_dp); | |
59f3e272 | 3080 | ret = intel_dp_get_dpcd(intel_dp); |
bd943159 | 3081 | ironlake_edp_panel_vdd_off(intel_dp, false); |
99ea7127 | 3082 | |
59f3e272 | 3083 | if (ret) { |
7183dc29 JB |
3084 | if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11) |
3085 | dev_priv->no_aux_handshake = | |
3086 | intel_dp->dpcd[DP_MAX_DOWNSPREAD] & | |
89667383 JB |
3087 | DP_NO_AUX_HANDSHAKE_LINK_TRAINING; |
3088 | } else { | |
3d3dc149 | 3089 | /* if this fails, presume the device is a ghost */ |
48898b03 | 3090 | DRM_INFO("failed to retrieve link info, disabling eDP\n"); |
fa90ecef PZ |
3091 | intel_dp_encoder_destroy(&intel_encoder->base); |
3092 | intel_dp_destroy(connector); | |
3d3dc149 | 3093 | return; |
89667383 | 3094 | } |
89667383 | 3095 | |
f30d26e4 JN |
3096 | /* We now know it's not a ghost, init power sequence regs. */ |
3097 | intel_dp_init_panel_power_sequencer_registers(dev, intel_dp, | |
3098 | &power_seq); | |
3099 | ||
d6f24d0f JB |
3100 | ironlake_edp_panel_vdd_on(intel_dp); |
3101 | edid = drm_get_edid(connector, &intel_dp->adapter); | |
3102 | if (edid) { | |
9cd300e0 JN |
3103 | if (drm_add_edid_modes(connector, edid)) { |
3104 | drm_mode_connector_update_edid_property(connector, edid); | |
3105 | drm_edid_to_eld(connector, edid); | |
3106 | } else { | |
3107 | kfree(edid); | |
3108 | edid = ERR_PTR(-EINVAL); | |
3109 | } | |
3110 | } else { | |
3111 | edid = ERR_PTR(-ENOENT); | |
d6f24d0f | 3112 | } |
9cd300e0 | 3113 | intel_connector->edid = edid; |
f8779fda JN |
3114 | |
3115 | /* prefer fixed mode from EDID if available */ | |
3116 | list_for_each_entry(scan, &connector->probed_modes, head) { | |
3117 | if ((scan->type & DRM_MODE_TYPE_PREFERRED)) { | |
3118 | fixed_mode = drm_mode_duplicate(dev, scan); | |
3119 | break; | |
3120 | } | |
d6f24d0f | 3121 | } |
f8779fda JN |
3122 | |
3123 | /* fallback to VBT if available for eDP */ | |
41aa3448 RV |
3124 | if (!fixed_mode && dev_priv->vbt.lfp_lvds_vbt_mode) { |
3125 | fixed_mode = drm_mode_duplicate(dev, dev_priv->vbt.lfp_lvds_vbt_mode); | |
f8779fda JN |
3126 | if (fixed_mode) |
3127 | fixed_mode->type |= DRM_MODE_TYPE_PREFERRED; | |
3128 | } | |
f8779fda | 3129 | |
d6f24d0f JB |
3130 | ironlake_edp_panel_vdd_off(intel_dp, false); |
3131 | } | |
552fb0b7 | 3132 | |
4d926461 | 3133 | if (is_edp(intel_dp)) { |
dd06f90e | 3134 | intel_panel_init(&intel_connector->panel, fixed_mode); |
0657b6b1 | 3135 | intel_panel_setup_backlight(connector); |
32f9d658 ZW |
3136 | } |
3137 | ||
f684960e CW |
3138 | intel_dp_add_properties(intel_dp, connector); |
3139 | ||
a4fc5ed6 KP |
3140 | /* For G4X desktop chip, PEG_BAND_GAP_DATA 3:0 must first be written |
3141 | * 0xd. Failure to do so will result in spurious interrupts being | |
3142 | * generated on the port when a cable is not attached. | |
3143 | */ | |
3144 | if (IS_G4X(dev) && !IS_GM45(dev)) { | |
3145 | u32 temp = I915_READ(PEG_BAND_GAP_DATA); | |
3146 | I915_WRITE(PEG_BAND_GAP_DATA, (temp & ~0xf) | 0xd); | |
3147 | } | |
3148 | } | |
f0fec3f2 PZ |
3149 | |
3150 | void | |
3151 | intel_dp_init(struct drm_device *dev, int output_reg, enum port port) | |
3152 | { | |
3153 | struct intel_digital_port *intel_dig_port; | |
3154 | struct intel_encoder *intel_encoder; | |
3155 | struct drm_encoder *encoder; | |
3156 | struct intel_connector *intel_connector; | |
3157 | ||
3158 | intel_dig_port = kzalloc(sizeof(struct intel_digital_port), GFP_KERNEL); | |
3159 | if (!intel_dig_port) | |
3160 | return; | |
3161 | ||
3162 | intel_connector = kzalloc(sizeof(struct intel_connector), GFP_KERNEL); | |
3163 | if (!intel_connector) { | |
3164 | kfree(intel_dig_port); | |
3165 | return; | |
3166 | } | |
3167 | ||
3168 | intel_encoder = &intel_dig_port->base; | |
3169 | encoder = &intel_encoder->base; | |
3170 | ||
3171 | drm_encoder_init(dev, &intel_encoder->base, &intel_dp_enc_funcs, | |
3172 | DRM_MODE_ENCODER_TMDS); | |
00c09d70 | 3173 | drm_encoder_helper_add(&intel_encoder->base, &intel_dp_helper_funcs); |
f0fec3f2 | 3174 | |
5bfe2ac0 | 3175 | intel_encoder->compute_config = intel_dp_compute_config; |
00c09d70 PZ |
3176 | intel_encoder->enable = intel_enable_dp; |
3177 | intel_encoder->pre_enable = intel_pre_enable_dp; | |
3178 | intel_encoder->disable = intel_disable_dp; | |
3179 | intel_encoder->post_disable = intel_post_disable_dp; | |
3180 | intel_encoder->get_hw_state = intel_dp_get_hw_state; | |
045ac3b5 | 3181 | intel_encoder->get_config = intel_dp_get_config; |
89b667f8 JB |
3182 | if (IS_VALLEYVIEW(dev)) |
3183 | intel_encoder->pre_pll_enable = intel_dp_pre_pll_enable; | |
f0fec3f2 | 3184 | |
174edf1f | 3185 | intel_dig_port->port = port; |
f0fec3f2 PZ |
3186 | intel_dig_port->dp.output_reg = output_reg; |
3187 | ||
00c09d70 | 3188 | intel_encoder->type = INTEL_OUTPUT_DISPLAYPORT; |
f0fec3f2 PZ |
3189 | intel_encoder->crtc_mask = (1 << 0) | (1 << 1) | (1 << 2); |
3190 | intel_encoder->cloneable = false; | |
3191 | intel_encoder->hot_plug = intel_dp_hot_plug; | |
3192 | ||
3193 | intel_dp_init_connector(intel_dig_port, intel_connector); | |
3194 | } |