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1/*
2 * Copyright © 2006-2007 Intel Corporation
3 * Copyright (c) 2006 Dave Airlie <airlied@linux.ie>
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice (including the next
13 * paragraph) shall be included in all copies or substantial portions of the
14 * Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22 * DEALINGS IN THE SOFTWARE.
23 *
24 * Authors:
25 * Eric Anholt <eric@anholt.net>
26 * Dave Airlie <airlied@linux.ie>
27 * Jesse Barnes <jesse.barnes@intel.com>
28 */
29
30#include <acpi/button.h>
31#include <linux/acpi.h>
32#include <linux/dmi.h>
33#include <linux/i2c.h>
34#include <linux/slab.h>
35#include <linux/vga_switcheroo.h>
36
37#include <drm/drm_atomic_helper.h>
38#include <drm/drm_crtc.h>
39#include <drm/drm_edid.h>
40
41#include "i915_drv.h"
42#include "i915_reg.h"
43#include "intel_atomic.h"
44#include "intel_backlight.h"
45#include "intel_connector.h"
46#include "intel_de.h"
47#include "intel_display_types.h"
48#include "intel_dpll.h"
49#include "intel_fdi.h"
50#include "intel_gmbus.h"
51#include "intel_lvds.h"
52#include "intel_lvds_regs.h"
53#include "intel_panel.h"
54#include "intel_pps_regs.h"
55
56/* Private structure for the integrated LVDS support */
57struct intel_lvds_pps {
58 /* 100us units */
59 int t1_t2;
60 int t3;
61 int t4;
62 int t5;
63 int tx;
64
65 int divider;
66
67 int port;
68 bool powerdown_on_reset;
69};
70
71struct intel_lvds_encoder {
72 struct intel_encoder base;
73
74 bool is_dual_link;
75 i915_reg_t reg;
76 u32 a3_power;
77
78 struct intel_lvds_pps init_pps;
79 u32 init_lvds_val;
80
81 struct intel_connector *attached_connector;
82};
83
84static struct intel_lvds_encoder *to_lvds_encoder(struct intel_encoder *encoder)
85{
86 return container_of(encoder, struct intel_lvds_encoder, base);
87}
88
89bool intel_lvds_port_enabled(struct drm_i915_private *i915,
90 i915_reg_t lvds_reg, enum pipe *pipe)
91{
92 u32 val;
93
94 val = intel_de_read(i915, lvds_reg);
95
96 /* asserts want to know the pipe even if the port is disabled */
97 if (HAS_PCH_CPT(i915))
98 *pipe = REG_FIELD_GET(LVDS_PIPE_SEL_MASK_CPT, val);
99 else
100 *pipe = REG_FIELD_GET(LVDS_PIPE_SEL_MASK, val);
101
102 return val & LVDS_PORT_EN;
103}
104
105static bool intel_lvds_get_hw_state(struct intel_encoder *encoder,
106 enum pipe *pipe)
107{
108 struct drm_i915_private *i915 = to_i915(encoder->base.dev);
109 struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(encoder);
110 intel_wakeref_t wakeref;
111 bool ret;
112
113 wakeref = intel_display_power_get_if_enabled(i915, encoder->power_domain);
114 if (!wakeref)
115 return false;
116
117 ret = intel_lvds_port_enabled(i915, lvds_encoder->reg, pipe);
118
119 intel_display_power_put(i915, encoder->power_domain, wakeref);
120
121 return ret;
122}
123
124static void intel_lvds_get_config(struct intel_encoder *encoder,
125 struct intel_crtc_state *crtc_state)
126{
127 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
128 struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(encoder);
129 u32 tmp, flags = 0;
130
131 crtc_state->output_types |= BIT(INTEL_OUTPUT_LVDS);
132
133 tmp = intel_de_read(dev_priv, lvds_encoder->reg);
134 if (tmp & LVDS_HSYNC_POLARITY)
135 flags |= DRM_MODE_FLAG_NHSYNC;
136 else
137 flags |= DRM_MODE_FLAG_PHSYNC;
138 if (tmp & LVDS_VSYNC_POLARITY)
139 flags |= DRM_MODE_FLAG_NVSYNC;
140 else
141 flags |= DRM_MODE_FLAG_PVSYNC;
142
143 crtc_state->hw.adjusted_mode.flags |= flags;
144
145 if (DISPLAY_VER(dev_priv) < 5)
146 crtc_state->gmch_pfit.lvds_border_bits =
147 tmp & LVDS_BORDER_ENABLE;
148
149 /* gen2/3 store dither state in pfit control, needs to match */
150 if (DISPLAY_VER(dev_priv) < 4) {
151 tmp = intel_de_read(dev_priv, PFIT_CONTROL);
152
153 crtc_state->gmch_pfit.control |= tmp & PFIT_PANEL_8TO6_DITHER_ENABLE;
154 }
155
156 crtc_state->hw.adjusted_mode.crtc_clock = crtc_state->port_clock;
157}
158
159static void intel_lvds_pps_get_hw_state(struct drm_i915_private *dev_priv,
160 struct intel_lvds_pps *pps)
161{
162 u32 val;
163
164 pps->powerdown_on_reset = intel_de_read(dev_priv, PP_CONTROL(0)) & PANEL_POWER_RESET;
165
166 val = intel_de_read(dev_priv, PP_ON_DELAYS(0));
167 pps->port = REG_FIELD_GET(PANEL_PORT_SELECT_MASK, val);
168 pps->t1_t2 = REG_FIELD_GET(PANEL_POWER_UP_DELAY_MASK, val);
169 pps->t5 = REG_FIELD_GET(PANEL_LIGHT_ON_DELAY_MASK, val);
170
171 val = intel_de_read(dev_priv, PP_OFF_DELAYS(0));
172 pps->t3 = REG_FIELD_GET(PANEL_POWER_DOWN_DELAY_MASK, val);
173 pps->tx = REG_FIELD_GET(PANEL_LIGHT_OFF_DELAY_MASK, val);
174
175 val = intel_de_read(dev_priv, PP_DIVISOR(0));
176 pps->divider = REG_FIELD_GET(PP_REFERENCE_DIVIDER_MASK, val);
177 val = REG_FIELD_GET(PANEL_POWER_CYCLE_DELAY_MASK, val);
178 /*
179 * Remove the BSpec specified +1 (100ms) offset that accounts for a
180 * too short power-cycle delay due to the asynchronous programming of
181 * the register.
182 */
183 if (val)
184 val--;
185 /* Convert from 100ms to 100us units */
186 pps->t4 = val * 1000;
187
188 if (DISPLAY_VER(dev_priv) < 5 &&
189 pps->t1_t2 == 0 && pps->t5 == 0 && pps->t3 == 0 && pps->tx == 0) {
190 drm_dbg_kms(&dev_priv->drm,
191 "Panel power timings uninitialized, "
192 "setting defaults\n");
193 /* Set T2 to 40ms and T5 to 200ms in 100 usec units */
194 pps->t1_t2 = 40 * 10;
195 pps->t5 = 200 * 10;
196 /* Set T3 to 35ms and Tx to 200ms in 100 usec units */
197 pps->t3 = 35 * 10;
198 pps->tx = 200 * 10;
199 }
200
201 drm_dbg(&dev_priv->drm, "LVDS PPS:t1+t2 %d t3 %d t4 %d t5 %d tx %d "
202 "divider %d port %d powerdown_on_reset %d\n",
203 pps->t1_t2, pps->t3, pps->t4, pps->t5, pps->tx,
204 pps->divider, pps->port, pps->powerdown_on_reset);
205}
206
207static void intel_lvds_pps_init_hw(struct drm_i915_private *dev_priv,
208 struct intel_lvds_pps *pps)
209{
210 u32 val;
211
212 val = intel_de_read(dev_priv, PP_CONTROL(0));
213 drm_WARN_ON(&dev_priv->drm,
214 (val & PANEL_UNLOCK_MASK) != PANEL_UNLOCK_REGS);
215 if (pps->powerdown_on_reset)
216 val |= PANEL_POWER_RESET;
217 intel_de_write(dev_priv, PP_CONTROL(0), val);
218
219 intel_de_write(dev_priv, PP_ON_DELAYS(0),
220 REG_FIELD_PREP(PANEL_PORT_SELECT_MASK, pps->port) |
221 REG_FIELD_PREP(PANEL_POWER_UP_DELAY_MASK, pps->t1_t2) |
222 REG_FIELD_PREP(PANEL_LIGHT_ON_DELAY_MASK, pps->t5));
223
224 intel_de_write(dev_priv, PP_OFF_DELAYS(0),
225 REG_FIELD_PREP(PANEL_POWER_DOWN_DELAY_MASK, pps->t3) |
226 REG_FIELD_PREP(PANEL_LIGHT_OFF_DELAY_MASK, pps->tx));
227
228 intel_de_write(dev_priv, PP_DIVISOR(0),
229 REG_FIELD_PREP(PP_REFERENCE_DIVIDER_MASK, pps->divider) |
230 REG_FIELD_PREP(PANEL_POWER_CYCLE_DELAY_MASK, DIV_ROUND_UP(pps->t4, 1000) + 1));
231}
232
233static void intel_pre_enable_lvds(struct intel_atomic_state *state,
234 struct intel_encoder *encoder,
235 const struct intel_crtc_state *crtc_state,
236 const struct drm_connector_state *conn_state)
237{
238 struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(encoder);
239 struct drm_i915_private *i915 = to_i915(encoder->base.dev);
240 struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
241 const struct drm_display_mode *adjusted_mode = &crtc_state->hw.adjusted_mode;
242 enum pipe pipe = crtc->pipe;
243 u32 temp;
244
245 if (HAS_PCH_SPLIT(i915)) {
246 assert_fdi_rx_pll_disabled(i915, pipe);
247 assert_shared_dpll_disabled(i915, crtc_state->shared_dpll);
248 } else {
249 assert_pll_disabled(i915, pipe);
250 }
251
252 intel_lvds_pps_init_hw(i915, &lvds_encoder->init_pps);
253
254 temp = lvds_encoder->init_lvds_val;
255 temp |= LVDS_PORT_EN | LVDS_A0A2_CLKA_POWER_UP;
256
257 if (HAS_PCH_CPT(i915)) {
258 temp &= ~LVDS_PIPE_SEL_MASK_CPT;
259 temp |= LVDS_PIPE_SEL_CPT(pipe);
260 } else {
261 temp &= ~LVDS_PIPE_SEL_MASK;
262 temp |= LVDS_PIPE_SEL(pipe);
263 }
264
265 /* set the corresponsding LVDS_BORDER bit */
266 temp &= ~LVDS_BORDER_ENABLE;
267 temp |= crtc_state->gmch_pfit.lvds_border_bits;
268
269 /*
270 * Set the B0-B3 data pairs corresponding to whether we're going to
271 * set the DPLLs for dual-channel mode or not.
272 */
273 if (lvds_encoder->is_dual_link)
274 temp |= LVDS_B0B3_POWER_UP | LVDS_CLKB_POWER_UP;
275 else
276 temp &= ~(LVDS_B0B3_POWER_UP | LVDS_CLKB_POWER_UP);
277
278 /*
279 * It would be nice to set 24 vs 18-bit mode (LVDS_A3_POWER_UP)
280 * appropriately here, but we need to look more thoroughly into how
281 * panels behave in the two modes. For now, let's just maintain the
282 * value we got from the BIOS.
283 */
284 temp &= ~LVDS_A3_POWER_MASK;
285 temp |= lvds_encoder->a3_power;
286
287 /*
288 * Set the dithering flag on LVDS as needed, note that there is no
289 * special lvds dither control bit on pch-split platforms, dithering is
290 * only controlled through the TRANSCONF reg.
291 */
292 if (DISPLAY_VER(i915) == 4) {
293 /*
294 * Bspec wording suggests that LVDS port dithering only exists
295 * for 18bpp panels.
296 */
297 if (crtc_state->dither && crtc_state->pipe_bpp == 18)
298 temp |= LVDS_ENABLE_DITHER;
299 else
300 temp &= ~LVDS_ENABLE_DITHER;
301 }
302 temp &= ~(LVDS_HSYNC_POLARITY | LVDS_VSYNC_POLARITY);
303 if (adjusted_mode->flags & DRM_MODE_FLAG_NHSYNC)
304 temp |= LVDS_HSYNC_POLARITY;
305 if (adjusted_mode->flags & DRM_MODE_FLAG_NVSYNC)
306 temp |= LVDS_VSYNC_POLARITY;
307
308 intel_de_write(i915, lvds_encoder->reg, temp);
309}
310
311/*
312 * Sets the power state for the panel.
313 */
314static void intel_enable_lvds(struct intel_atomic_state *state,
315 struct intel_encoder *encoder,
316 const struct intel_crtc_state *crtc_state,
317 const struct drm_connector_state *conn_state)
318{
319 struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(encoder);
320 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
321
322 intel_de_rmw(dev_priv, lvds_encoder->reg, 0, LVDS_PORT_EN);
323
324 intel_de_rmw(dev_priv, PP_CONTROL(0), 0, PANEL_POWER_ON);
325 intel_de_posting_read(dev_priv, lvds_encoder->reg);
326
327 if (intel_de_wait_for_set(dev_priv, PP_STATUS(0), PP_ON, 5000))
328 drm_err(&dev_priv->drm,
329 "timed out waiting for panel to power on\n");
330
331 intel_backlight_enable(crtc_state, conn_state);
332}
333
334static void intel_disable_lvds(struct intel_atomic_state *state,
335 struct intel_encoder *encoder,
336 const struct intel_crtc_state *old_crtc_state,
337 const struct drm_connector_state *old_conn_state)
338{
339 struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(encoder);
340 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
341
342 intel_de_rmw(dev_priv, PP_CONTROL(0), PANEL_POWER_ON, 0);
343 if (intel_de_wait_for_clear(dev_priv, PP_STATUS(0), PP_ON, 1000))
344 drm_err(&dev_priv->drm,
345 "timed out waiting for panel to power off\n");
346
347 intel_de_rmw(dev_priv, lvds_encoder->reg, LVDS_PORT_EN, 0);
348 intel_de_posting_read(dev_priv, lvds_encoder->reg);
349}
350
351static void gmch_disable_lvds(struct intel_atomic_state *state,
352 struct intel_encoder *encoder,
353 const struct intel_crtc_state *old_crtc_state,
354 const struct drm_connector_state *old_conn_state)
355
356{
357 intel_backlight_disable(old_conn_state);
358
359 intel_disable_lvds(state, encoder, old_crtc_state, old_conn_state);
360}
361
362static void pch_disable_lvds(struct intel_atomic_state *state,
363 struct intel_encoder *encoder,
364 const struct intel_crtc_state *old_crtc_state,
365 const struct drm_connector_state *old_conn_state)
366{
367 intel_backlight_disable(old_conn_state);
368}
369
370static void pch_post_disable_lvds(struct intel_atomic_state *state,
371 struct intel_encoder *encoder,
372 const struct intel_crtc_state *old_crtc_state,
373 const struct drm_connector_state *old_conn_state)
374{
375 intel_disable_lvds(state, encoder, old_crtc_state, old_conn_state);
376}
377
378static void intel_lvds_shutdown(struct intel_encoder *encoder)
379{
380 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
381
382 if (intel_de_wait_for_clear(dev_priv, PP_STATUS(0), PP_CYCLE_DELAY_ACTIVE, 5000))
383 drm_err(&dev_priv->drm,
384 "timed out waiting for panel power cycle delay\n");
385}
386
387static enum drm_mode_status
388intel_lvds_mode_valid(struct drm_connector *_connector,
389 struct drm_display_mode *mode)
390{
391 struct intel_connector *connector = to_intel_connector(_connector);
392 struct drm_i915_private *i915 = to_i915(connector->base.dev);
393 const struct drm_display_mode *fixed_mode =
394 intel_panel_fixed_mode(connector, mode);
395 int max_pixclk = to_i915(connector->base.dev)->max_dotclk_freq;
396 enum drm_mode_status status;
397
398 status = intel_cpu_transcoder_mode_valid(i915, mode);
399 if (status != MODE_OK)
400 return status;
401
402 if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
403 return MODE_NO_DBLESCAN;
404
405 status = intel_panel_mode_valid(connector, mode);
406 if (status != MODE_OK)
407 return status;
408
409 if (fixed_mode->clock > max_pixclk)
410 return MODE_CLOCK_HIGH;
411
412 return MODE_OK;
413}
414
415static int intel_lvds_compute_config(struct intel_encoder *encoder,
416 struct intel_crtc_state *crtc_state,
417 struct drm_connector_state *conn_state)
418{
419 struct drm_i915_private *i915 = to_i915(encoder->base.dev);
420 struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(encoder);
421 struct intel_connector *connector = lvds_encoder->attached_connector;
422 struct drm_display_mode *adjusted_mode = &crtc_state->hw.adjusted_mode;
423 struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
424 unsigned int lvds_bpp;
425 int ret;
426
427 /* Should never happen!! */
428 if (DISPLAY_VER(i915) < 4 && crtc->pipe == 0) {
429 drm_err(&i915->drm, "Can't support LVDS on pipe A\n");
430 return -EINVAL;
431 }
432
433 if (HAS_PCH_SPLIT(i915)) {
434 crtc_state->has_pch_encoder = true;
435 if (!intel_fdi_compute_pipe_bpp(crtc_state))
436 return -EINVAL;
437 }
438
439 if (lvds_encoder->a3_power == LVDS_A3_POWER_UP)
440 lvds_bpp = 8*3;
441 else
442 lvds_bpp = 6*3;
443
444 /* TODO: Check crtc_state->max_link_bpp_x16 instead of bw_constrained */
445 if (lvds_bpp != crtc_state->pipe_bpp && !crtc_state->bw_constrained) {
446 drm_dbg_kms(&i915->drm,
447 "forcing display bpp (was %d) to LVDS (%d)\n",
448 crtc_state->pipe_bpp, lvds_bpp);
449 crtc_state->pipe_bpp = lvds_bpp;
450 }
451
452 crtc_state->sink_format = INTEL_OUTPUT_FORMAT_RGB;
453 crtc_state->output_format = INTEL_OUTPUT_FORMAT_RGB;
454
455 /*
456 * We have timings from the BIOS for the panel, put them in
457 * to the adjusted mode. The CRTC will be set up for this mode,
458 * with the panel scaling set up to source from the H/VDisplay
459 * of the original mode.
460 */
461 ret = intel_panel_compute_config(connector, adjusted_mode);
462 if (ret)
463 return ret;
464
465 if (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN)
466 return -EINVAL;
467
468 ret = intel_panel_fitting(crtc_state, conn_state);
469 if (ret)
470 return ret;
471
472 /*
473 * XXX: It would be nice to support lower refresh rates on the
474 * panels to reduce power consumption, and perhaps match the
475 * user's requested refresh rate.
476 */
477
478 return 0;
479}
480
481/*
482 * Return the list of DDC modes if available, or the BIOS fixed mode otherwise.
483 */
484static int intel_lvds_get_modes(struct drm_connector *_connector)
485{
486 struct intel_connector *connector = to_intel_connector(_connector);
487 const struct drm_edid *fixed_edid = connector->panel.fixed_edid;
488
489 /* Use panel fixed edid if we have one */
490 if (!IS_ERR_OR_NULL(fixed_edid)) {
491 drm_edid_connector_update(&connector->base, fixed_edid);
492
493 return drm_edid_connector_add_modes(&connector->base);
494 }
495
496 return intel_panel_get_modes(connector);
497}
498
499static const struct drm_connector_helper_funcs intel_lvds_connector_helper_funcs = {
500 .get_modes = intel_lvds_get_modes,
501 .mode_valid = intel_lvds_mode_valid,
502 .atomic_check = intel_digital_connector_atomic_check,
503};
504
505static const struct drm_connector_funcs intel_lvds_connector_funcs = {
506 .detect = intel_panel_detect,
507 .fill_modes = drm_helper_probe_single_connector_modes,
508 .atomic_get_property = intel_digital_connector_atomic_get_property,
509 .atomic_set_property = intel_digital_connector_atomic_set_property,
510 .late_register = intel_connector_register,
511 .early_unregister = intel_connector_unregister,
512 .destroy = intel_connector_destroy,
513 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
514 .atomic_duplicate_state = intel_digital_connector_duplicate_state,
515};
516
517static const struct drm_encoder_funcs intel_lvds_enc_funcs = {
518 .destroy = intel_encoder_destroy,
519};
520
521static int intel_no_lvds_dmi_callback(const struct dmi_system_id *id)
522{
523 DRM_INFO("Skipping LVDS initialization for %s\n", id->ident);
524 return 1;
525}
526
527/* These systems claim to have LVDS, but really don't */
528static const struct dmi_system_id intel_no_lvds[] = {
529 {
530 .callback = intel_no_lvds_dmi_callback,
531 .ident = "Apple Mac Mini (Core series)",
532 .matches = {
533 DMI_MATCH(DMI_SYS_VENDOR, "Apple"),
534 DMI_MATCH(DMI_PRODUCT_NAME, "Macmini1,1"),
535 },
536 },
537 {
538 .callback = intel_no_lvds_dmi_callback,
539 .ident = "Apple Mac Mini (Core 2 series)",
540 .matches = {
541 DMI_MATCH(DMI_SYS_VENDOR, "Apple"),
542 DMI_MATCH(DMI_PRODUCT_NAME, "Macmini2,1"),
543 },
544 },
545 {
546 .callback = intel_no_lvds_dmi_callback,
547 .ident = "MSI IM-945GSE-A",
548 .matches = {
549 DMI_MATCH(DMI_SYS_VENDOR, "MSI"),
550 DMI_MATCH(DMI_PRODUCT_NAME, "A9830IMS"),
551 },
552 },
553 {
554 .callback = intel_no_lvds_dmi_callback,
555 .ident = "Dell Studio Hybrid",
556 .matches = {
557 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
558 DMI_MATCH(DMI_PRODUCT_NAME, "Studio Hybrid 140g"),
559 },
560 },
561 {
562 .callback = intel_no_lvds_dmi_callback,
563 .ident = "Dell OptiPlex FX170",
564 .matches = {
565 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
566 DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex FX170"),
567 },
568 },
569 {
570 .callback = intel_no_lvds_dmi_callback,
571 .ident = "AOpen Mini PC",
572 .matches = {
573 DMI_MATCH(DMI_SYS_VENDOR, "AOpen"),
574 DMI_MATCH(DMI_PRODUCT_NAME, "i965GMx-IF"),
575 },
576 },
577 {
578 .callback = intel_no_lvds_dmi_callback,
579 .ident = "AOpen Mini PC MP915",
580 .matches = {
581 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
582 DMI_MATCH(DMI_BOARD_NAME, "i915GMx-F"),
583 },
584 },
585 {
586 .callback = intel_no_lvds_dmi_callback,
587 .ident = "AOpen i915GMm-HFS",
588 .matches = {
589 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
590 DMI_MATCH(DMI_BOARD_NAME, "i915GMm-HFS"),
591 },
592 },
593 {
594 .callback = intel_no_lvds_dmi_callback,
595 .ident = "AOpen i45GMx-I",
596 .matches = {
597 DMI_MATCH(DMI_BOARD_VENDOR, "AOpen"),
598 DMI_MATCH(DMI_BOARD_NAME, "i45GMx-I"),
599 },
600 },
601 {
602 .callback = intel_no_lvds_dmi_callback,
603 .ident = "Aopen i945GTt-VFA",
604 .matches = {
605 DMI_MATCH(DMI_PRODUCT_VERSION, "AO00001JW"),
606 },
607 },
608 {
609 .callback = intel_no_lvds_dmi_callback,
610 .ident = "Clientron U800",
611 .matches = {
612 DMI_MATCH(DMI_SYS_VENDOR, "Clientron"),
613 DMI_MATCH(DMI_PRODUCT_NAME, "U800"),
614 },
615 },
616 {
617 .callback = intel_no_lvds_dmi_callback,
618 .ident = "Clientron E830",
619 .matches = {
620 DMI_MATCH(DMI_SYS_VENDOR, "Clientron"),
621 DMI_MATCH(DMI_PRODUCT_NAME, "E830"),
622 },
623 },
624 {
625 .callback = intel_no_lvds_dmi_callback,
626 .ident = "Asus EeeBox PC EB1007",
627 .matches = {
628 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer INC."),
629 DMI_MATCH(DMI_PRODUCT_NAME, "EB1007"),
630 },
631 },
632 {
633 .callback = intel_no_lvds_dmi_callback,
634 .ident = "Asus AT5NM10T-I",
635 .matches = {
636 DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
637 DMI_MATCH(DMI_BOARD_NAME, "AT5NM10T-I"),
638 },
639 },
640 {
641 .callback = intel_no_lvds_dmi_callback,
642 .ident = "Hewlett-Packard HP t5740",
643 .matches = {
644 DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
645 DMI_MATCH(DMI_PRODUCT_NAME, " t5740"),
646 },
647 },
648 {
649 .callback = intel_no_lvds_dmi_callback,
650 .ident = "Hewlett-Packard t5745",
651 .matches = {
652 DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
653 DMI_MATCH(DMI_PRODUCT_NAME, "hp t5745"),
654 },
655 },
656 {
657 .callback = intel_no_lvds_dmi_callback,
658 .ident = "Hewlett-Packard st5747",
659 .matches = {
660 DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
661 DMI_MATCH(DMI_PRODUCT_NAME, "hp st5747"),
662 },
663 },
664 {
665 .callback = intel_no_lvds_dmi_callback,
666 .ident = "MSI Wind Box DC500",
667 .matches = {
668 DMI_MATCH(DMI_BOARD_VENDOR, "MICRO-STAR INTERNATIONAL CO., LTD"),
669 DMI_MATCH(DMI_BOARD_NAME, "MS-7469"),
670 },
671 },
672 {
673 .callback = intel_no_lvds_dmi_callback,
674 .ident = "Gigabyte GA-D525TUD",
675 .matches = {
676 DMI_MATCH(DMI_BOARD_VENDOR, "Gigabyte Technology Co., Ltd."),
677 DMI_MATCH(DMI_BOARD_NAME, "D525TUD"),
678 },
679 },
680 {
681 .callback = intel_no_lvds_dmi_callback,
682 .ident = "Supermicro X7SPA-H",
683 .matches = {
684 DMI_MATCH(DMI_SYS_VENDOR, "Supermicro"),
685 DMI_MATCH(DMI_PRODUCT_NAME, "X7SPA-H"),
686 },
687 },
688 {
689 .callback = intel_no_lvds_dmi_callback,
690 .ident = "Fujitsu Esprimo Q900",
691 .matches = {
692 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
693 DMI_MATCH(DMI_PRODUCT_NAME, "ESPRIMO Q900"),
694 },
695 },
696 {
697 .callback = intel_no_lvds_dmi_callback,
698 .ident = "Intel D410PT",
699 .matches = {
700 DMI_MATCH(DMI_BOARD_VENDOR, "Intel"),
701 DMI_MATCH(DMI_BOARD_NAME, "D410PT"),
702 },
703 },
704 {
705 .callback = intel_no_lvds_dmi_callback,
706 .ident = "Intel D425KT",
707 .matches = {
708 DMI_MATCH(DMI_BOARD_VENDOR, "Intel"),
709 DMI_EXACT_MATCH(DMI_BOARD_NAME, "D425KT"),
710 },
711 },
712 {
713 .callback = intel_no_lvds_dmi_callback,
714 .ident = "Intel D510MO",
715 .matches = {
716 DMI_MATCH(DMI_BOARD_VENDOR, "Intel"),
717 DMI_EXACT_MATCH(DMI_BOARD_NAME, "D510MO"),
718 },
719 },
720 {
721 .callback = intel_no_lvds_dmi_callback,
722 .ident = "Intel D525MW",
723 .matches = {
724 DMI_MATCH(DMI_BOARD_VENDOR, "Intel"),
725 DMI_EXACT_MATCH(DMI_BOARD_NAME, "D525MW"),
726 },
727 },
728 {
729 .callback = intel_no_lvds_dmi_callback,
730 .ident = "Radiant P845",
731 .matches = {
732 DMI_MATCH(DMI_SYS_VENDOR, "Radiant Systems Inc"),
733 DMI_MATCH(DMI_PRODUCT_NAME, "P845"),
734 },
735 },
736
737 { } /* terminating entry */
738};
739
740static int intel_dual_link_lvds_callback(const struct dmi_system_id *id)
741{
742 DRM_INFO("Forcing lvds to dual link mode on %s\n", id->ident);
743 return 1;
744}
745
746static const struct dmi_system_id intel_dual_link_lvds[] = {
747 {
748 .callback = intel_dual_link_lvds_callback,
749 .ident = "Apple MacBook Pro 15\" (2010)",
750 .matches = {
751 DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
752 DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro6,2"),
753 },
754 },
755 {
756 .callback = intel_dual_link_lvds_callback,
757 .ident = "Apple MacBook Pro 15\" (2011)",
758 .matches = {
759 DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
760 DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro8,2"),
761 },
762 },
763 {
764 .callback = intel_dual_link_lvds_callback,
765 .ident = "Apple MacBook Pro 15\" (2012)",
766 .matches = {
767 DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
768 DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro9,1"),
769 },
770 },
771 { } /* terminating entry */
772};
773
774struct intel_encoder *intel_get_lvds_encoder(struct drm_i915_private *i915)
775{
776 struct intel_encoder *encoder;
777
778 for_each_intel_encoder(&i915->drm, encoder) {
779 if (encoder->type == INTEL_OUTPUT_LVDS)
780 return encoder;
781 }
782
783 return NULL;
784}
785
786bool intel_is_dual_link_lvds(struct drm_i915_private *i915)
787{
788 struct intel_encoder *encoder = intel_get_lvds_encoder(i915);
789
790 return encoder && to_lvds_encoder(encoder)->is_dual_link;
791}
792
793static bool compute_is_dual_link_lvds(struct intel_lvds_encoder *lvds_encoder)
794{
795 struct drm_i915_private *i915 = to_i915(lvds_encoder->base.base.dev);
796 struct intel_connector *connector = lvds_encoder->attached_connector;
797 const struct drm_display_mode *fixed_mode =
798 intel_panel_preferred_fixed_mode(connector);
799 unsigned int val;
800
801 /* use the module option value if specified */
802 if (i915->display.params.lvds_channel_mode > 0)
803 return i915->display.params.lvds_channel_mode == 2;
804
805 /* single channel LVDS is limited to 112 MHz */
806 if (fixed_mode->clock > 112999)
807 return true;
808
809 if (dmi_check_system(intel_dual_link_lvds))
810 return true;
811
812 /*
813 * BIOS should set the proper LVDS register value at boot, but
814 * in reality, it doesn't set the value when the lid is closed;
815 * we need to check "the value to be set" in VBT when LVDS
816 * register is uninitialized.
817 */
818 val = intel_de_read(i915, lvds_encoder->reg);
819 if (HAS_PCH_CPT(i915))
820 val &= ~(LVDS_DETECTED | LVDS_PIPE_SEL_MASK_CPT);
821 else
822 val &= ~(LVDS_DETECTED | LVDS_PIPE_SEL_MASK);
823 if (val == 0)
824 val = connector->panel.vbt.bios_lvds_val;
825
826 return (val & LVDS_CLKB_POWER_MASK) == LVDS_CLKB_POWER_UP;
827}
828
829static void intel_lvds_add_properties(struct drm_connector *connector)
830{
831 intel_attach_scaling_mode_property(connector);
832}
833
834/**
835 * intel_lvds_init - setup LVDS connectors on this device
836 * @i915: i915 device
837 *
838 * Create the connector, register the LVDS DDC bus, and try to figure out what
839 * modes we can display on the LVDS panel (if present).
840 */
841void intel_lvds_init(struct drm_i915_private *i915)
842{
843 struct intel_lvds_encoder *lvds_encoder;
844 struct intel_connector *connector;
845 const struct drm_edid *drm_edid;
846 struct intel_encoder *encoder;
847 i915_reg_t lvds_reg;
848 u32 lvds;
849 u8 ddc_pin;
850
851 /* Skip init on machines we know falsely report LVDS */
852 if (dmi_check_system(intel_no_lvds)) {
853 drm_WARN(&i915->drm, !i915->display.vbt.int_lvds_support,
854 "Useless DMI match. Internal LVDS support disabled by VBT\n");
855 return;
856 }
857
858 if (!i915->display.vbt.int_lvds_support) {
859 drm_dbg_kms(&i915->drm,
860 "Internal LVDS support disabled by VBT\n");
861 return;
862 }
863
864 if (HAS_PCH_SPLIT(i915))
865 lvds_reg = PCH_LVDS;
866 else
867 lvds_reg = LVDS;
868
869 lvds = intel_de_read(i915, lvds_reg);
870
871 if (HAS_PCH_SPLIT(i915)) {
872 if ((lvds & LVDS_DETECTED) == 0)
873 return;
874 }
875
876 ddc_pin = GMBUS_PIN_PANEL;
877 if (!intel_bios_is_lvds_present(i915, &ddc_pin)) {
878 if ((lvds & LVDS_PORT_EN) == 0) {
879 drm_dbg_kms(&i915->drm,
880 "LVDS is not present in VBT\n");
881 return;
882 }
883 drm_dbg_kms(&i915->drm,
884 "LVDS is not present in VBT, but enabled anyway\n");
885 }
886
887 lvds_encoder = kzalloc(sizeof(*lvds_encoder), GFP_KERNEL);
888 if (!lvds_encoder)
889 return;
890
891 connector = intel_connector_alloc();
892 if (!connector) {
893 kfree(lvds_encoder);
894 return;
895 }
896
897 lvds_encoder->attached_connector = connector;
898 encoder = &lvds_encoder->base;
899
900 drm_connector_init_with_ddc(&i915->drm, &connector->base,
901 &intel_lvds_connector_funcs,
902 DRM_MODE_CONNECTOR_LVDS,
903 intel_gmbus_get_adapter(i915, ddc_pin));
904
905 drm_encoder_init(&i915->drm, &encoder->base, &intel_lvds_enc_funcs,
906 DRM_MODE_ENCODER_LVDS, "LVDS");
907
908 encoder->enable = intel_enable_lvds;
909 encoder->pre_enable = intel_pre_enable_lvds;
910 encoder->compute_config = intel_lvds_compute_config;
911 if (HAS_PCH_SPLIT(i915)) {
912 encoder->disable = pch_disable_lvds;
913 encoder->post_disable = pch_post_disable_lvds;
914 } else {
915 encoder->disable = gmch_disable_lvds;
916 }
917 encoder->get_hw_state = intel_lvds_get_hw_state;
918 encoder->get_config = intel_lvds_get_config;
919 encoder->update_pipe = intel_backlight_update;
920 encoder->shutdown = intel_lvds_shutdown;
921 connector->get_hw_state = intel_connector_get_hw_state;
922
923 intel_connector_attach_encoder(connector, encoder);
924
925 encoder->type = INTEL_OUTPUT_LVDS;
926 encoder->power_domain = POWER_DOMAIN_PORT_OTHER;
927 encoder->port = PORT_NONE;
928 encoder->cloneable = 0;
929 if (DISPLAY_VER(i915) < 4)
930 encoder->pipe_mask = BIT(PIPE_B);
931 else
932 encoder->pipe_mask = ~0;
933
934 drm_connector_helper_add(&connector->base, &intel_lvds_connector_helper_funcs);
935 connector->base.display_info.subpixel_order = SubPixelHorizontalRGB;
936
937 lvds_encoder->reg = lvds_reg;
938
939 intel_lvds_add_properties(&connector->base);
940
941 intel_lvds_pps_get_hw_state(i915, &lvds_encoder->init_pps);
942 lvds_encoder->init_lvds_val = lvds;
943
944 /*
945 * LVDS discovery:
946 * 1) check for EDID on DDC
947 * 2) check for VBT data
948 * 3) check to see if LVDS is already on
949 * if none of the above, no panel
950 */
951
952 /*
953 * Attempt to get the fixed panel mode from DDC. Assume that the
954 * preferred mode is the right one.
955 */
956 mutex_lock(&i915->drm.mode_config.mutex);
957 if (vga_switcheroo_handler_flags() & VGA_SWITCHEROO_CAN_SWITCH_DDC)
958 drm_edid = drm_edid_read_switcheroo(&connector->base, connector->base.ddc);
959 else
960 drm_edid = drm_edid_read_ddc(&connector->base, connector->base.ddc);
961 if (drm_edid) {
962 if (drm_edid_connector_update(&connector->base, drm_edid) ||
963 !drm_edid_connector_add_modes(&connector->base)) {
964 drm_edid_connector_update(&connector->base, NULL);
965 drm_edid_free(drm_edid);
966 drm_edid = ERR_PTR(-EINVAL);
967 }
968 } else {
969 drm_edid = ERR_PTR(-ENOENT);
970 }
971 intel_bios_init_panel_late(i915, &connector->panel, NULL,
972 IS_ERR(drm_edid) ? NULL : drm_edid);
973
974 /* Try EDID first */
975 intel_panel_add_edid_fixed_modes(connector, true);
976
977 /* Failed to get EDID, what about VBT? */
978 if (!intel_panel_preferred_fixed_mode(connector))
979 intel_panel_add_vbt_lfp_fixed_mode(connector);
980
981 /*
982 * If we didn't get a fixed mode from EDID or VBT, try checking
983 * if the panel is already turned on. If so, assume that
984 * whatever is currently programmed is the correct mode.
985 */
986 if (!intel_panel_preferred_fixed_mode(connector))
987 intel_panel_add_encoder_fixed_mode(connector, encoder);
988
989 mutex_unlock(&i915->drm.mode_config.mutex);
990
991 /* If we still don't have a mode after all that, give up. */
992 if (!intel_panel_preferred_fixed_mode(connector))
993 goto failed;
994
995 intel_panel_init(connector, drm_edid);
996
997 intel_backlight_setup(connector, INVALID_PIPE);
998
999 lvds_encoder->is_dual_link = compute_is_dual_link_lvds(lvds_encoder);
1000 drm_dbg_kms(&i915->drm, "detected %s-link lvds configuration\n",
1001 lvds_encoder->is_dual_link ? "dual" : "single");
1002
1003 lvds_encoder->a3_power = lvds & LVDS_A3_POWER_MASK;
1004
1005 return;
1006
1007failed:
1008 drm_dbg_kms(&i915->drm, "No LVDS modes found, disabling.\n");
1009 drm_connector_cleanup(&connector->base);
1010 drm_encoder_cleanup(&encoder->base);
1011 kfree(lvds_encoder);
1012 intel_connector_free(connector);
1013 return;
1014}