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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright © 2006-2007 Intel Corporation
4 *
5 * Authors:
6 * Eric Anholt <eric@anholt.net>
7 * Dave Airlie <airlied@linux.ie>
8 * Jesse Barnes <jesse.barnes@intel.com>
9 */
10
11#include <linux/i2c.h>
12#include <linux/pm_runtime.h>
13
14#include <drm/drm_crtc_helper.h>
15#include <drm/drm_modeset_helper_vtables.h>
16#include <drm/drm_simple_kms_helper.h>
17
18#include "intel_bios.h"
19#include "power.h"
20#include "psb_drv.h"
21#include "psb_intel_drv.h"
22#include "psb_intel_reg.h"
23
24/*
25 * LVDS I2C backlight control macros
26 */
27#define BRIGHTNESS_MAX_LEVEL 100
28#define BRIGHTNESS_MASK 0xFF
29#define BLC_I2C_TYPE 0x01
30#define BLC_PWM_TYPT 0x02
31
32#define BLC_POLARITY_NORMAL 0
33#define BLC_POLARITY_INVERSE 1
34
35#define PSB_BLC_MAX_PWM_REG_FREQ (0xFFFE)
36#define PSB_BLC_MIN_PWM_REG_FREQ (0x2)
37#define PSB_BLC_PWM_PRECISION_FACTOR (10)
38#define PSB_BACKLIGHT_PWM_CTL_SHIFT (16)
39#define PSB_BACKLIGHT_PWM_POLARITY_BIT_CLEAR (0xFFFE)
40
41struct psb_intel_lvds_priv {
42 /*
43 * Saved LVDO output states
44 */
45 uint32_t savePP_ON;
46 uint32_t savePP_OFF;
47 uint32_t saveLVDS;
48 uint32_t savePP_CONTROL;
49 uint32_t savePP_CYCLE;
50 uint32_t savePFIT_CONTROL;
51 uint32_t savePFIT_PGM_RATIOS;
52 uint32_t saveBLC_PWM_CTL;
53
54 struct gma_i2c_chan *i2c_bus;
55};
56
57
58/*
59 * Returns the maximum level of the backlight duty cycle field.
60 */
61static u32 psb_intel_lvds_get_max_backlight(struct drm_device *dev)
62{
63 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
64 u32 ret;
65
66 if (gma_power_begin(dev, false)) {
67 ret = REG_READ(BLC_PWM_CTL);
68 gma_power_end(dev);
69 } else /* Powered off, use the saved value */
70 ret = dev_priv->regs.saveBLC_PWM_CTL;
71
72 /* Top 15bits hold the frequency mask */
73 ret = (ret & BACKLIGHT_MODULATION_FREQ_MASK) >>
74 BACKLIGHT_MODULATION_FREQ_SHIFT;
75
76 ret *= 2; /* Return a 16bit range as needed for setting */
77 if (ret == 0)
78 dev_err(dev->dev, "BL bug: Reg %08x save %08X\n",
79 REG_READ(BLC_PWM_CTL), dev_priv->regs.saveBLC_PWM_CTL);
80 return ret;
81}
82
83/*
84 * Set LVDS backlight level by I2C command
85 *
86 * FIXME: at some point we need to both track this for PM and also
87 * disable runtime pm on MRST if the brightness is nil (ie blanked)
88 */
89static int psb_lvds_i2c_set_brightness(struct drm_device *dev,
90 unsigned int level)
91{
92 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
93
94 struct gma_i2c_chan *lvds_i2c_bus = dev_priv->lvds_i2c_bus;
95 u8 out_buf[2];
96 unsigned int blc_i2c_brightness;
97
98 struct i2c_msg msgs[] = {
99 {
100 .addr = lvds_i2c_bus->target_addr,
101 .flags = 0,
102 .len = 2,
103 .buf = out_buf,
104 }
105 };
106
107 blc_i2c_brightness = BRIGHTNESS_MASK & ((unsigned int)level *
108 BRIGHTNESS_MASK /
109 BRIGHTNESS_MAX_LEVEL);
110
111 if (dev_priv->lvds_bl->pol == BLC_POLARITY_INVERSE)
112 blc_i2c_brightness = BRIGHTNESS_MASK - blc_i2c_brightness;
113
114 out_buf[0] = dev_priv->lvds_bl->brightnesscmd;
115 out_buf[1] = (u8)blc_i2c_brightness;
116
117 if (i2c_transfer(&lvds_i2c_bus->base, msgs, 1) == 1) {
118 dev_dbg(dev->dev, "I2C set brightness.(command, value) (%d, %d)\n",
119 dev_priv->lvds_bl->brightnesscmd,
120 blc_i2c_brightness);
121 return 0;
122 }
123
124 dev_err(dev->dev, "I2C transfer error\n");
125 return -1;
126}
127
128
129static int psb_lvds_pwm_set_brightness(struct drm_device *dev, int level)
130{
131 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
132
133 u32 max_pwm_blc;
134 u32 blc_pwm_duty_cycle;
135
136 max_pwm_blc = psb_intel_lvds_get_max_backlight(dev);
137
138 /*BLC_PWM_CTL Should be initiated while backlight device init*/
139 BUG_ON(max_pwm_blc == 0);
140
141 blc_pwm_duty_cycle = level * max_pwm_blc / BRIGHTNESS_MAX_LEVEL;
142
143 if (dev_priv->lvds_bl->pol == BLC_POLARITY_INVERSE)
144 blc_pwm_duty_cycle = max_pwm_blc - blc_pwm_duty_cycle;
145
146 blc_pwm_duty_cycle &= PSB_BACKLIGHT_PWM_POLARITY_BIT_CLEAR;
147 REG_WRITE(BLC_PWM_CTL,
148 (max_pwm_blc << PSB_BACKLIGHT_PWM_CTL_SHIFT) |
149 (blc_pwm_duty_cycle));
150
151 dev_info(dev->dev, "Backlight lvds set brightness %08x\n",
152 (max_pwm_blc << PSB_BACKLIGHT_PWM_CTL_SHIFT) |
153 (blc_pwm_duty_cycle));
154
155 return 0;
156}
157
158/*
159 * Set LVDS backlight level either by I2C or PWM
160 */
161void psb_intel_lvds_set_brightness(struct drm_device *dev, int level)
162{
163 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
164
165 dev_dbg(dev->dev, "backlight level is %d\n", level);
166
167 if (!dev_priv->lvds_bl) {
168 dev_err(dev->dev, "NO LVDS backlight info\n");
169 return;
170 }
171
172 if (dev_priv->lvds_bl->type == BLC_I2C_TYPE)
173 psb_lvds_i2c_set_brightness(dev, level);
174 else
175 psb_lvds_pwm_set_brightness(dev, level);
176}
177
178/*
179 * Sets the backlight level.
180 *
181 * level: backlight level, from 0 to psb_intel_lvds_get_max_backlight().
182 */
183static void psb_intel_lvds_set_backlight(struct drm_device *dev, int level)
184{
185 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
186 u32 blc_pwm_ctl;
187
188 if (gma_power_begin(dev, false)) {
189 blc_pwm_ctl = REG_READ(BLC_PWM_CTL);
190 blc_pwm_ctl &= ~BACKLIGHT_DUTY_CYCLE_MASK;
191 REG_WRITE(BLC_PWM_CTL,
192 (blc_pwm_ctl |
193 (level << BACKLIGHT_DUTY_CYCLE_SHIFT)));
194 dev_priv->regs.saveBLC_PWM_CTL = (blc_pwm_ctl |
195 (level << BACKLIGHT_DUTY_CYCLE_SHIFT));
196 gma_power_end(dev);
197 } else {
198 blc_pwm_ctl = dev_priv->regs.saveBLC_PWM_CTL &
199 ~BACKLIGHT_DUTY_CYCLE_MASK;
200 dev_priv->regs.saveBLC_PWM_CTL = (blc_pwm_ctl |
201 (level << BACKLIGHT_DUTY_CYCLE_SHIFT));
202 }
203}
204
205/*
206 * Sets the power state for the panel.
207 */
208static void psb_intel_lvds_set_power(struct drm_device *dev, bool on)
209{
210 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
211 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
212 u32 pp_status;
213
214 if (!gma_power_begin(dev, true)) {
215 dev_err(dev->dev, "set power, chip off!\n");
216 return;
217 }
218
219 if (on) {
220 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) |
221 POWER_TARGET_ON);
222 do {
223 pp_status = REG_READ(PP_STATUS);
224 } while ((pp_status & PP_ON) == 0);
225
226 psb_intel_lvds_set_backlight(dev,
227 mode_dev->backlight_duty_cycle);
228 } else {
229 psb_intel_lvds_set_backlight(dev, 0);
230
231 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) &
232 ~POWER_TARGET_ON);
233 do {
234 pp_status = REG_READ(PP_STATUS);
235 } while (pp_status & PP_ON);
236 }
237
238 gma_power_end(dev);
239}
240
241static void psb_intel_lvds_encoder_dpms(struct drm_encoder *encoder, int mode)
242{
243 struct drm_device *dev = encoder->dev;
244
245 if (mode == DRM_MODE_DPMS_ON)
246 psb_intel_lvds_set_power(dev, true);
247 else
248 psb_intel_lvds_set_power(dev, false);
249
250 /* XXX: We never power down the LVDS pairs. */
251}
252
253static void psb_intel_lvds_save(struct drm_connector *connector)
254{
255 struct drm_device *dev = connector->dev;
256 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
257 struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
258 struct psb_intel_lvds_priv *lvds_priv =
259 (struct psb_intel_lvds_priv *)gma_encoder->dev_priv;
260
261 lvds_priv->savePP_ON = REG_READ(LVDSPP_ON);
262 lvds_priv->savePP_OFF = REG_READ(LVDSPP_OFF);
263 lvds_priv->saveLVDS = REG_READ(LVDS);
264 lvds_priv->savePP_CONTROL = REG_READ(PP_CONTROL);
265 lvds_priv->savePP_CYCLE = REG_READ(PP_CYCLE);
266 /*lvds_priv->savePP_DIVISOR = REG_READ(PP_DIVISOR);*/
267 lvds_priv->saveBLC_PWM_CTL = REG_READ(BLC_PWM_CTL);
268 lvds_priv->savePFIT_CONTROL = REG_READ(PFIT_CONTROL);
269 lvds_priv->savePFIT_PGM_RATIOS = REG_READ(PFIT_PGM_RATIOS);
270
271 /*TODO: move backlight_duty_cycle to psb_intel_lvds_priv*/
272 dev_priv->backlight_duty_cycle = (dev_priv->regs.saveBLC_PWM_CTL &
273 BACKLIGHT_DUTY_CYCLE_MASK);
274
275 /*
276 * If the light is off at server startup,
277 * just make it full brightness
278 */
279 if (dev_priv->backlight_duty_cycle == 0)
280 dev_priv->backlight_duty_cycle =
281 psb_intel_lvds_get_max_backlight(dev);
282
283 dev_dbg(dev->dev, "(0x%x, 0x%x, 0x%x, 0x%x, 0x%x, 0x%x)\n",
284 lvds_priv->savePP_ON,
285 lvds_priv->savePP_OFF,
286 lvds_priv->saveLVDS,
287 lvds_priv->savePP_CONTROL,
288 lvds_priv->savePP_CYCLE,
289 lvds_priv->saveBLC_PWM_CTL);
290}
291
292static void psb_intel_lvds_restore(struct drm_connector *connector)
293{
294 struct drm_device *dev = connector->dev;
295 u32 pp_status;
296 struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
297 struct psb_intel_lvds_priv *lvds_priv =
298 (struct psb_intel_lvds_priv *)gma_encoder->dev_priv;
299
300 dev_dbg(dev->dev, "(0x%x, 0x%x, 0x%x, 0x%x, 0x%x, 0x%x)\n",
301 lvds_priv->savePP_ON,
302 lvds_priv->savePP_OFF,
303 lvds_priv->saveLVDS,
304 lvds_priv->savePP_CONTROL,
305 lvds_priv->savePP_CYCLE,
306 lvds_priv->saveBLC_PWM_CTL);
307
308 REG_WRITE(BLC_PWM_CTL, lvds_priv->saveBLC_PWM_CTL);
309 REG_WRITE(PFIT_CONTROL, lvds_priv->savePFIT_CONTROL);
310 REG_WRITE(PFIT_PGM_RATIOS, lvds_priv->savePFIT_PGM_RATIOS);
311 REG_WRITE(LVDSPP_ON, lvds_priv->savePP_ON);
312 REG_WRITE(LVDSPP_OFF, lvds_priv->savePP_OFF);
313 /*REG_WRITE(PP_DIVISOR, lvds_priv->savePP_DIVISOR);*/
314 REG_WRITE(PP_CYCLE, lvds_priv->savePP_CYCLE);
315 REG_WRITE(PP_CONTROL, lvds_priv->savePP_CONTROL);
316 REG_WRITE(LVDS, lvds_priv->saveLVDS);
317
318 if (lvds_priv->savePP_CONTROL & POWER_TARGET_ON) {
319 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) |
320 POWER_TARGET_ON);
321 do {
322 pp_status = REG_READ(PP_STATUS);
323 } while ((pp_status & PP_ON) == 0);
324 } else {
325 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) &
326 ~POWER_TARGET_ON);
327 do {
328 pp_status = REG_READ(PP_STATUS);
329 } while (pp_status & PP_ON);
330 }
331}
332
333enum drm_mode_status psb_intel_lvds_mode_valid(struct drm_connector *connector,
334 struct drm_display_mode *mode)
335{
336 struct drm_psb_private *dev_priv = to_drm_psb_private(connector->dev);
337 struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
338 struct drm_display_mode *fixed_mode =
339 dev_priv->mode_dev.panel_fixed_mode;
340
341 if (gma_encoder->type == INTEL_OUTPUT_MIPI2)
342 fixed_mode = dev_priv->mode_dev.panel_fixed_mode2;
343
344 /* just in case */
345 if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
346 return MODE_NO_DBLESCAN;
347
348 /* just in case */
349 if (mode->flags & DRM_MODE_FLAG_INTERLACE)
350 return MODE_NO_INTERLACE;
351
352 if (fixed_mode) {
353 if (mode->hdisplay > fixed_mode->hdisplay)
354 return MODE_PANEL;
355 if (mode->vdisplay > fixed_mode->vdisplay)
356 return MODE_PANEL;
357 }
358 return MODE_OK;
359}
360
361bool psb_intel_lvds_mode_fixup(struct drm_encoder *encoder,
362 const struct drm_display_mode *mode,
363 struct drm_display_mode *adjusted_mode)
364{
365 struct drm_device *dev = encoder->dev;
366 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
367 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
368 struct gma_crtc *gma_crtc = to_gma_crtc(encoder->crtc);
369 struct drm_encoder *tmp_encoder;
370 struct drm_display_mode *panel_fixed_mode = mode_dev->panel_fixed_mode;
371 struct gma_encoder *gma_encoder = to_gma_encoder(encoder);
372
373 if (gma_encoder->type == INTEL_OUTPUT_MIPI2)
374 panel_fixed_mode = mode_dev->panel_fixed_mode2;
375
376 /* PSB requires the LVDS is on pipe B, MRST has only one pipe anyway */
377 if (!IS_MRST(dev) && gma_crtc->pipe == 0) {
378 pr_err("Can't support LVDS on pipe A\n");
379 return false;
380 }
381 if (IS_MRST(dev) && gma_crtc->pipe != 0) {
382 pr_err("Must use PIPE A\n");
383 return false;
384 }
385 /* Should never happen!! */
386 list_for_each_entry(tmp_encoder, &dev->mode_config.encoder_list,
387 head) {
388 if (tmp_encoder != encoder
389 && tmp_encoder->crtc == encoder->crtc) {
390 pr_err("Can't enable LVDS and another encoder on the same pipe\n");
391 return false;
392 }
393 }
394
395 /*
396 * If we have timings from the BIOS for the panel, put them in
397 * to the adjusted mode. The CRTC will be set up for this mode,
398 * with the panel scaling set up to source from the H/VDisplay
399 * of the original mode.
400 */
401 if (panel_fixed_mode != NULL) {
402 adjusted_mode->hdisplay = panel_fixed_mode->hdisplay;
403 adjusted_mode->hsync_start = panel_fixed_mode->hsync_start;
404 adjusted_mode->hsync_end = panel_fixed_mode->hsync_end;
405 adjusted_mode->htotal = panel_fixed_mode->htotal;
406 adjusted_mode->vdisplay = panel_fixed_mode->vdisplay;
407 adjusted_mode->vsync_start = panel_fixed_mode->vsync_start;
408 adjusted_mode->vsync_end = panel_fixed_mode->vsync_end;
409 adjusted_mode->vtotal = panel_fixed_mode->vtotal;
410 adjusted_mode->clock = panel_fixed_mode->clock;
411 drm_mode_set_crtcinfo(adjusted_mode,
412 CRTC_INTERLACE_HALVE_V);
413 }
414
415 /*
416 * XXX: It would be nice to support lower refresh rates on the
417 * panels to reduce power consumption, and perhaps match the
418 * user's requested refresh rate.
419 */
420
421 return true;
422}
423
424static void psb_intel_lvds_prepare(struct drm_encoder *encoder)
425{
426 struct drm_device *dev = encoder->dev;
427 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
428 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
429
430 if (!gma_power_begin(dev, true))
431 return;
432
433 mode_dev->saveBLC_PWM_CTL = REG_READ(BLC_PWM_CTL);
434 mode_dev->backlight_duty_cycle = (mode_dev->saveBLC_PWM_CTL &
435 BACKLIGHT_DUTY_CYCLE_MASK);
436
437 psb_intel_lvds_set_power(dev, false);
438
439 gma_power_end(dev);
440}
441
442static void psb_intel_lvds_commit(struct drm_encoder *encoder)
443{
444 struct drm_device *dev = encoder->dev;
445 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
446 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
447
448 if (mode_dev->backlight_duty_cycle == 0)
449 mode_dev->backlight_duty_cycle =
450 psb_intel_lvds_get_max_backlight(dev);
451
452 psb_intel_lvds_set_power(dev, true);
453}
454
455static void psb_intel_lvds_mode_set(struct drm_encoder *encoder,
456 struct drm_display_mode *mode,
457 struct drm_display_mode *adjusted_mode)
458{
459 struct drm_device *dev = encoder->dev;
460 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
461 u32 pfit_control;
462
463 /*
464 * The LVDS pin pair will already have been turned on in the
465 * psb_intel_crtc_mode_set since it has a large impact on the DPLL
466 * settings.
467 */
468
469 /*
470 * Enable automatic panel scaling so that non-native modes fill the
471 * screen. Should be enabled before the pipe is enabled, according to
472 * register description and PRM.
473 */
474 if (mode->hdisplay != adjusted_mode->hdisplay ||
475 mode->vdisplay != adjusted_mode->vdisplay)
476 pfit_control = (PFIT_ENABLE | VERT_AUTO_SCALE |
477 HORIZ_AUTO_SCALE | VERT_INTERP_BILINEAR |
478 HORIZ_INTERP_BILINEAR);
479 else
480 pfit_control = 0;
481
482 if (dev_priv->lvds_dither)
483 pfit_control |= PANEL_8TO6_DITHER_ENABLE;
484
485 REG_WRITE(PFIT_CONTROL, pfit_control);
486}
487
488/*
489 * Return the list of DDC modes if available, or the BIOS fixed mode otherwise.
490 */
491static int psb_intel_lvds_get_modes(struct drm_connector *connector)
492{
493 struct drm_device *dev = connector->dev;
494 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
495 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
496 int ret = 0;
497
498 if (!IS_MRST(dev))
499 ret = psb_intel_ddc_get_modes(connector, connector->ddc);
500
501 if (ret)
502 return ret;
503
504 if (mode_dev->panel_fixed_mode != NULL) {
505 struct drm_display_mode *mode =
506 drm_mode_duplicate(dev, mode_dev->panel_fixed_mode);
507 if (!mode)
508 return 0;
509
510 drm_mode_probed_add(connector, mode);
511 return 1;
512 }
513
514 return 0;
515}
516
517void psb_intel_lvds_destroy(struct drm_connector *connector)
518{
519 struct gma_connector *gma_connector = to_gma_connector(connector);
520 struct gma_i2c_chan *ddc_bus = to_gma_i2c_chan(connector->ddc);
521
522 gma_i2c_destroy(ddc_bus);
523 drm_connector_cleanup(connector);
524 kfree(gma_connector);
525}
526
527int psb_intel_lvds_set_property(struct drm_connector *connector,
528 struct drm_property *property,
529 uint64_t value)
530{
531 struct drm_encoder *encoder = connector->encoder;
532
533 if (!encoder)
534 return -1;
535
536 if (!strcmp(property->name, "scaling mode")) {
537 struct gma_crtc *crtc = to_gma_crtc(encoder->crtc);
538 uint64_t curval;
539
540 if (!crtc)
541 goto set_prop_error;
542
543 switch (value) {
544 case DRM_MODE_SCALE_FULLSCREEN:
545 break;
546 case DRM_MODE_SCALE_NO_SCALE:
547 break;
548 case DRM_MODE_SCALE_ASPECT:
549 break;
550 default:
551 goto set_prop_error;
552 }
553
554 if (drm_object_property_get_value(&connector->base,
555 property,
556 &curval))
557 goto set_prop_error;
558
559 if (curval == value)
560 goto set_prop_done;
561
562 if (drm_object_property_set_value(&connector->base,
563 property,
564 value))
565 goto set_prop_error;
566
567 if (crtc->saved_mode.hdisplay != 0 &&
568 crtc->saved_mode.vdisplay != 0) {
569 if (!drm_crtc_helper_set_mode(encoder->crtc,
570 &crtc->saved_mode,
571 encoder->crtc->x,
572 encoder->crtc->y,
573 encoder->crtc->primary->fb))
574 goto set_prop_error;
575 }
576 } else if (!strcmp(property->name, "backlight")) {
577 if (drm_object_property_set_value(&connector->base,
578 property,
579 value))
580 goto set_prop_error;
581 else
582 gma_backlight_set(encoder->dev, value);
583 } else if (!strcmp(property->name, "DPMS")) {
584 const struct drm_encoder_helper_funcs *hfuncs
585 = encoder->helper_private;
586 hfuncs->dpms(encoder, value);
587 }
588
589set_prop_done:
590 return 0;
591set_prop_error:
592 return -1;
593}
594
595static const struct drm_encoder_helper_funcs psb_intel_lvds_helper_funcs = {
596 .dpms = psb_intel_lvds_encoder_dpms,
597 .mode_fixup = psb_intel_lvds_mode_fixup,
598 .prepare = psb_intel_lvds_prepare,
599 .mode_set = psb_intel_lvds_mode_set,
600 .commit = psb_intel_lvds_commit,
601};
602
603const struct drm_connector_helper_funcs
604 psb_intel_lvds_connector_helper_funcs = {
605 .get_modes = psb_intel_lvds_get_modes,
606 .mode_valid = psb_intel_lvds_mode_valid,
607 .best_encoder = gma_best_encoder,
608};
609
610const struct drm_connector_funcs psb_intel_lvds_connector_funcs = {
611 .dpms = drm_helper_connector_dpms,
612 .fill_modes = drm_helper_probe_single_connector_modes,
613 .set_property = psb_intel_lvds_set_property,
614 .destroy = psb_intel_lvds_destroy,
615};
616
617/**
618 * psb_intel_lvds_init - setup LVDS connectors on this device
619 * @dev: drm device
620 * @mode_dev: mode device
621 *
622 * Create the connector, register the LVDS DDC bus, and try to figure out what
623 * modes we can display on the LVDS panel (if present).
624 */
625void psb_intel_lvds_init(struct drm_device *dev,
626 struct psb_intel_mode_device *mode_dev)
627{
628 struct gma_encoder *gma_encoder;
629 struct gma_connector *gma_connector;
630 struct psb_intel_lvds_priv *lvds_priv;
631 struct drm_connector *connector;
632 struct drm_encoder *encoder;
633 struct drm_display_mode *scan; /* *modes, *bios_mode; */
634 struct drm_crtc *crtc;
635 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
636 struct gma_i2c_chan *ddc_bus;
637 u32 lvds;
638 int pipe;
639 int ret;
640
641 gma_encoder = kzalloc(sizeof(struct gma_encoder), GFP_KERNEL);
642 if (!gma_encoder) {
643 dev_err(dev->dev, "gma_encoder allocation error\n");
644 return;
645 }
646 encoder = &gma_encoder->base;
647
648 gma_connector = kzalloc(sizeof(struct gma_connector), GFP_KERNEL);
649 if (!gma_connector) {
650 dev_err(dev->dev, "gma_connector allocation error\n");
651 goto err_free_encoder;
652 }
653
654 lvds_priv = kzalloc(sizeof(struct psb_intel_lvds_priv), GFP_KERNEL);
655 if (!lvds_priv) {
656 dev_err(dev->dev, "LVDS private allocation error\n");
657 goto err_free_connector;
658 }
659
660 gma_encoder->dev_priv = lvds_priv;
661
662 connector = &gma_connector->base;
663 gma_connector->save = psb_intel_lvds_save;
664 gma_connector->restore = psb_intel_lvds_restore;
665
666 /* Set up the DDC bus. */
667 ddc_bus = gma_i2c_create(dev, GPIOC, "LVDSDDC_C");
668 if (!ddc_bus) {
669 dev_printk(KERN_ERR, dev->dev,
670 "DDC bus registration " "failed.\n");
671 goto err_free_lvds_priv;
672 }
673
674 ret = drm_connector_init_with_ddc(dev, connector,
675 &psb_intel_lvds_connector_funcs,
676 DRM_MODE_CONNECTOR_LVDS,
677 &ddc_bus->base);
678 if (ret)
679 goto err_ddc_destroy;
680
681 ret = drm_simple_encoder_init(dev, encoder, DRM_MODE_ENCODER_LVDS);
682 if (ret)
683 goto err_connector_cleanup;
684
685 gma_connector_attach_encoder(gma_connector, gma_encoder);
686 gma_encoder->type = INTEL_OUTPUT_LVDS;
687
688 drm_encoder_helper_add(encoder, &psb_intel_lvds_helper_funcs);
689 drm_connector_helper_add(connector,
690 &psb_intel_lvds_connector_helper_funcs);
691 connector->display_info.subpixel_order = SubPixelHorizontalRGB;
692 connector->interlace_allowed = false;
693 connector->doublescan_allowed = false;
694
695 /*Attach connector properties*/
696 drm_object_attach_property(&connector->base,
697 dev->mode_config.scaling_mode_property,
698 DRM_MODE_SCALE_FULLSCREEN);
699 drm_object_attach_property(&connector->base,
700 dev_priv->backlight_property,
701 BRIGHTNESS_MAX_LEVEL);
702
703 /*
704 * Set up I2C bus
705 * FIXME: distroy i2c_bus when exit
706 */
707 lvds_priv->i2c_bus = gma_i2c_create(dev, GPIOB, "LVDSBLC_B");
708 if (!lvds_priv->i2c_bus) {
709 dev_printk(KERN_ERR,
710 dev->dev, "I2C bus registration failed.\n");
711 goto err_encoder_cleanup;
712 }
713 lvds_priv->i2c_bus->target_addr = 0x2C;
714 dev_priv->lvds_i2c_bus = lvds_priv->i2c_bus;
715
716 /*
717 * LVDS discovery:
718 * 1) check for EDID on DDC
719 * 2) check for VBT data
720 * 3) check to see if LVDS is already on
721 * if none of the above, no panel
722 * 4) make sure lid is open
723 * if closed, act like it's not there for now
724 */
725
726 /*
727 * Attempt to get the fixed panel mode from DDC. Assume that the
728 * preferred mode is the right one.
729 */
730 mutex_lock(&dev->mode_config.mutex);
731 psb_intel_ddc_get_modes(connector, &ddc_bus->base);
732
733 list_for_each_entry(scan, &connector->probed_modes, head) {
734 if (scan->type & DRM_MODE_TYPE_PREFERRED) {
735 mode_dev->panel_fixed_mode =
736 drm_mode_duplicate(dev, scan);
737 DRM_DEBUG_KMS("Using mode from DDC\n");
738 goto out; /* FIXME: check for quirks */
739 }
740 }
741
742 /* Failed to get EDID, what about VBT? do we need this? */
743 if (dev_priv->lfp_lvds_vbt_mode) {
744 mode_dev->panel_fixed_mode =
745 drm_mode_duplicate(dev, dev_priv->lfp_lvds_vbt_mode);
746
747 if (mode_dev->panel_fixed_mode) {
748 mode_dev->panel_fixed_mode->type |=
749 DRM_MODE_TYPE_PREFERRED;
750 DRM_DEBUG_KMS("Using mode from VBT\n");
751 goto out;
752 }
753 }
754
755 /*
756 * If we didn't get EDID, try checking if the panel is already turned
757 * on. If so, assume that whatever is currently programmed is the
758 * correct mode.
759 */
760 lvds = REG_READ(LVDS);
761 pipe = (lvds & LVDS_PIPEB_SELECT) ? 1 : 0;
762 crtc = psb_intel_get_crtc_from_pipe(dev, pipe);
763
764 if (crtc && (lvds & LVDS_PORT_EN)) {
765 mode_dev->panel_fixed_mode =
766 psb_intel_crtc_mode_get(dev, crtc);
767 if (mode_dev->panel_fixed_mode) {
768 mode_dev->panel_fixed_mode->type |=
769 DRM_MODE_TYPE_PREFERRED;
770 DRM_DEBUG_KMS("Using pre-programmed mode\n");
771 goto out; /* FIXME: check for quirks */
772 }
773 }
774
775 /* If we still don't have a mode after all that, give up. */
776 if (!mode_dev->panel_fixed_mode) {
777 dev_err(dev->dev, "Found no modes on the lvds, ignoring the LVDS\n");
778 goto err_unlock;
779 }
780
781 /*
782 * Blacklist machines with BIOSes that list an LVDS panel without
783 * actually having one.
784 */
785out:
786 mutex_unlock(&dev->mode_config.mutex);
787 return;
788
789err_unlock:
790 mutex_unlock(&dev->mode_config.mutex);
791 gma_i2c_destroy(lvds_priv->i2c_bus);
792err_encoder_cleanup:
793 drm_encoder_cleanup(encoder);
794err_connector_cleanup:
795 drm_connector_cleanup(connector);
796err_ddc_destroy:
797 gma_i2c_destroy(ddc_bus);
798err_free_lvds_priv:
799 kfree(lvds_priv);
800err_free_connector:
801 kfree(gma_connector);
802err_free_encoder:
803 kfree(gma_encoder);
804}
805
1/*
2 * Copyright © 2006-2007 Intel Corporation
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms and conditions of the GNU General Public License,
6 * version 2, as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
11 * more details.
12 *
13 * You should have received a copy of the GNU General Public License along with
14 * this program; if not, write to the Free Software Foundation, Inc.,
15 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
16 *
17 * Authors:
18 * Eric Anholt <eric@anholt.net>
19 * Dave Airlie <airlied@linux.ie>
20 * Jesse Barnes <jesse.barnes@intel.com>
21 */
22
23#include <linux/i2c.h>
24#include <drm/drmP.h>
25
26#include "intel_bios.h"
27#include "psb_drv.h"
28#include "psb_intel_drv.h"
29#include "psb_intel_reg.h"
30#include "power.h"
31#include <linux/pm_runtime.h>
32
33/*
34 * LVDS I2C backlight control macros
35 */
36#define BRIGHTNESS_MAX_LEVEL 100
37#define BRIGHTNESS_MASK 0xFF
38#define BLC_I2C_TYPE 0x01
39#define BLC_PWM_TYPT 0x02
40
41#define BLC_POLARITY_NORMAL 0
42#define BLC_POLARITY_INVERSE 1
43
44#define PSB_BLC_MAX_PWM_REG_FREQ (0xFFFE)
45#define PSB_BLC_MIN_PWM_REG_FREQ (0x2)
46#define PSB_BLC_PWM_PRECISION_FACTOR (10)
47#define PSB_BACKLIGHT_PWM_CTL_SHIFT (16)
48#define PSB_BACKLIGHT_PWM_POLARITY_BIT_CLEAR (0xFFFE)
49
50struct psb_intel_lvds_priv {
51 /*
52 * Saved LVDO output states
53 */
54 uint32_t savePP_ON;
55 uint32_t savePP_OFF;
56 uint32_t saveLVDS;
57 uint32_t savePP_CONTROL;
58 uint32_t savePP_CYCLE;
59 uint32_t savePFIT_CONTROL;
60 uint32_t savePFIT_PGM_RATIOS;
61 uint32_t saveBLC_PWM_CTL;
62
63 struct psb_intel_i2c_chan *i2c_bus;
64 struct psb_intel_i2c_chan *ddc_bus;
65};
66
67
68/*
69 * Returns the maximum level of the backlight duty cycle field.
70 */
71static u32 psb_intel_lvds_get_max_backlight(struct drm_device *dev)
72{
73 struct drm_psb_private *dev_priv = dev->dev_private;
74 u32 ret;
75
76 if (gma_power_begin(dev, false)) {
77 ret = REG_READ(BLC_PWM_CTL);
78 gma_power_end(dev);
79 } else /* Powered off, use the saved value */
80 ret = dev_priv->regs.saveBLC_PWM_CTL;
81
82 /* Top 15bits hold the frequency mask */
83 ret = (ret & BACKLIGHT_MODULATION_FREQ_MASK) >>
84 BACKLIGHT_MODULATION_FREQ_SHIFT;
85
86 ret *= 2; /* Return a 16bit range as needed for setting */
87 if (ret == 0)
88 dev_err(dev->dev, "BL bug: Reg %08x save %08X\n",
89 REG_READ(BLC_PWM_CTL), dev_priv->regs.saveBLC_PWM_CTL);
90 return ret;
91}
92
93/*
94 * Set LVDS backlight level by I2C command
95 *
96 * FIXME: at some point we need to both track this for PM and also
97 * disable runtime pm on MRST if the brightness is nil (ie blanked)
98 */
99static int psb_lvds_i2c_set_brightness(struct drm_device *dev,
100 unsigned int level)
101{
102 struct drm_psb_private *dev_priv =
103 (struct drm_psb_private *)dev->dev_private;
104
105 struct psb_intel_i2c_chan *lvds_i2c_bus = dev_priv->lvds_i2c_bus;
106 u8 out_buf[2];
107 unsigned int blc_i2c_brightness;
108
109 struct i2c_msg msgs[] = {
110 {
111 .addr = lvds_i2c_bus->slave_addr,
112 .flags = 0,
113 .len = 2,
114 .buf = out_buf,
115 }
116 };
117
118 blc_i2c_brightness = BRIGHTNESS_MASK & ((unsigned int)level *
119 BRIGHTNESS_MASK /
120 BRIGHTNESS_MAX_LEVEL);
121
122 if (dev_priv->lvds_bl->pol == BLC_POLARITY_INVERSE)
123 blc_i2c_brightness = BRIGHTNESS_MASK - blc_i2c_brightness;
124
125 out_buf[0] = dev_priv->lvds_bl->brightnesscmd;
126 out_buf[1] = (u8)blc_i2c_brightness;
127
128 if (i2c_transfer(&lvds_i2c_bus->adapter, msgs, 1) == 1) {
129 dev_dbg(dev->dev, "I2C set brightness.(command, value) (%d, %d)\n",
130 dev_priv->lvds_bl->brightnesscmd,
131 blc_i2c_brightness);
132 return 0;
133 }
134
135 dev_err(dev->dev, "I2C transfer error\n");
136 return -1;
137}
138
139
140static int psb_lvds_pwm_set_brightness(struct drm_device *dev, int level)
141{
142 struct drm_psb_private *dev_priv =
143 (struct drm_psb_private *)dev->dev_private;
144
145 u32 max_pwm_blc;
146 u32 blc_pwm_duty_cycle;
147
148 max_pwm_blc = psb_intel_lvds_get_max_backlight(dev);
149
150 /*BLC_PWM_CTL Should be initiated while backlight device init*/
151 BUG_ON(max_pwm_blc == 0);
152
153 blc_pwm_duty_cycle = level * max_pwm_blc / BRIGHTNESS_MAX_LEVEL;
154
155 if (dev_priv->lvds_bl->pol == BLC_POLARITY_INVERSE)
156 blc_pwm_duty_cycle = max_pwm_blc - blc_pwm_duty_cycle;
157
158 blc_pwm_duty_cycle &= PSB_BACKLIGHT_PWM_POLARITY_BIT_CLEAR;
159 REG_WRITE(BLC_PWM_CTL,
160 (max_pwm_blc << PSB_BACKLIGHT_PWM_CTL_SHIFT) |
161 (blc_pwm_duty_cycle));
162
163 dev_info(dev->dev, "Backlight lvds set brightness %08x\n",
164 (max_pwm_blc << PSB_BACKLIGHT_PWM_CTL_SHIFT) |
165 (blc_pwm_duty_cycle));
166
167 return 0;
168}
169
170/*
171 * Set LVDS backlight level either by I2C or PWM
172 */
173void psb_intel_lvds_set_brightness(struct drm_device *dev, int level)
174{
175 struct drm_psb_private *dev_priv = dev->dev_private;
176
177 dev_dbg(dev->dev, "backlight level is %d\n", level);
178
179 if (!dev_priv->lvds_bl) {
180 dev_err(dev->dev, "NO LVDS backlight info\n");
181 return;
182 }
183
184 if (dev_priv->lvds_bl->type == BLC_I2C_TYPE)
185 psb_lvds_i2c_set_brightness(dev, level);
186 else
187 psb_lvds_pwm_set_brightness(dev, level);
188}
189
190/*
191 * Sets the backlight level.
192 *
193 * level: backlight level, from 0 to psb_intel_lvds_get_max_backlight().
194 */
195static void psb_intel_lvds_set_backlight(struct drm_device *dev, int level)
196{
197 struct drm_psb_private *dev_priv = dev->dev_private;
198 u32 blc_pwm_ctl;
199
200 if (gma_power_begin(dev, false)) {
201 blc_pwm_ctl = REG_READ(BLC_PWM_CTL);
202 blc_pwm_ctl &= ~BACKLIGHT_DUTY_CYCLE_MASK;
203 REG_WRITE(BLC_PWM_CTL,
204 (blc_pwm_ctl |
205 (level << BACKLIGHT_DUTY_CYCLE_SHIFT)));
206 dev_priv->regs.saveBLC_PWM_CTL = (blc_pwm_ctl |
207 (level << BACKLIGHT_DUTY_CYCLE_SHIFT));
208 gma_power_end(dev);
209 } else {
210 blc_pwm_ctl = dev_priv->regs.saveBLC_PWM_CTL &
211 ~BACKLIGHT_DUTY_CYCLE_MASK;
212 dev_priv->regs.saveBLC_PWM_CTL = (blc_pwm_ctl |
213 (level << BACKLIGHT_DUTY_CYCLE_SHIFT));
214 }
215}
216
217/*
218 * Sets the power state for the panel.
219 */
220static void psb_intel_lvds_set_power(struct drm_device *dev, bool on)
221{
222 struct drm_psb_private *dev_priv = dev->dev_private;
223 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
224 u32 pp_status;
225
226 if (!gma_power_begin(dev, true)) {
227 dev_err(dev->dev, "set power, chip off!\n");
228 return;
229 }
230
231 if (on) {
232 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) |
233 POWER_TARGET_ON);
234 do {
235 pp_status = REG_READ(PP_STATUS);
236 } while ((pp_status & PP_ON) == 0);
237
238 psb_intel_lvds_set_backlight(dev,
239 mode_dev->backlight_duty_cycle);
240 } else {
241 psb_intel_lvds_set_backlight(dev, 0);
242
243 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) &
244 ~POWER_TARGET_ON);
245 do {
246 pp_status = REG_READ(PP_STATUS);
247 } while (pp_status & PP_ON);
248 }
249
250 gma_power_end(dev);
251}
252
253static void psb_intel_lvds_encoder_dpms(struct drm_encoder *encoder, int mode)
254{
255 struct drm_device *dev = encoder->dev;
256
257 if (mode == DRM_MODE_DPMS_ON)
258 psb_intel_lvds_set_power(dev, true);
259 else
260 psb_intel_lvds_set_power(dev, false);
261
262 /* XXX: We never power down the LVDS pairs. */
263}
264
265static void psb_intel_lvds_save(struct drm_connector *connector)
266{
267 struct drm_device *dev = connector->dev;
268 struct drm_psb_private *dev_priv =
269 (struct drm_psb_private *)dev->dev_private;
270 struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
271 struct psb_intel_lvds_priv *lvds_priv =
272 (struct psb_intel_lvds_priv *)gma_encoder->dev_priv;
273
274 lvds_priv->savePP_ON = REG_READ(LVDSPP_ON);
275 lvds_priv->savePP_OFF = REG_READ(LVDSPP_OFF);
276 lvds_priv->saveLVDS = REG_READ(LVDS);
277 lvds_priv->savePP_CONTROL = REG_READ(PP_CONTROL);
278 lvds_priv->savePP_CYCLE = REG_READ(PP_CYCLE);
279 /*lvds_priv->savePP_DIVISOR = REG_READ(PP_DIVISOR);*/
280 lvds_priv->saveBLC_PWM_CTL = REG_READ(BLC_PWM_CTL);
281 lvds_priv->savePFIT_CONTROL = REG_READ(PFIT_CONTROL);
282 lvds_priv->savePFIT_PGM_RATIOS = REG_READ(PFIT_PGM_RATIOS);
283
284 /*TODO: move backlight_duty_cycle to psb_intel_lvds_priv*/
285 dev_priv->backlight_duty_cycle = (dev_priv->regs.saveBLC_PWM_CTL &
286 BACKLIGHT_DUTY_CYCLE_MASK);
287
288 /*
289 * If the light is off at server startup,
290 * just make it full brightness
291 */
292 if (dev_priv->backlight_duty_cycle == 0)
293 dev_priv->backlight_duty_cycle =
294 psb_intel_lvds_get_max_backlight(dev);
295
296 dev_dbg(dev->dev, "(0x%x, 0x%x, 0x%x, 0x%x, 0x%x, 0x%x)\n",
297 lvds_priv->savePP_ON,
298 lvds_priv->savePP_OFF,
299 lvds_priv->saveLVDS,
300 lvds_priv->savePP_CONTROL,
301 lvds_priv->savePP_CYCLE,
302 lvds_priv->saveBLC_PWM_CTL);
303}
304
305static void psb_intel_lvds_restore(struct drm_connector *connector)
306{
307 struct drm_device *dev = connector->dev;
308 u32 pp_status;
309 struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
310 struct psb_intel_lvds_priv *lvds_priv =
311 (struct psb_intel_lvds_priv *)gma_encoder->dev_priv;
312
313 dev_dbg(dev->dev, "(0x%x, 0x%x, 0x%x, 0x%x, 0x%x, 0x%x)\n",
314 lvds_priv->savePP_ON,
315 lvds_priv->savePP_OFF,
316 lvds_priv->saveLVDS,
317 lvds_priv->savePP_CONTROL,
318 lvds_priv->savePP_CYCLE,
319 lvds_priv->saveBLC_PWM_CTL);
320
321 REG_WRITE(BLC_PWM_CTL, lvds_priv->saveBLC_PWM_CTL);
322 REG_WRITE(PFIT_CONTROL, lvds_priv->savePFIT_CONTROL);
323 REG_WRITE(PFIT_PGM_RATIOS, lvds_priv->savePFIT_PGM_RATIOS);
324 REG_WRITE(LVDSPP_ON, lvds_priv->savePP_ON);
325 REG_WRITE(LVDSPP_OFF, lvds_priv->savePP_OFF);
326 /*REG_WRITE(PP_DIVISOR, lvds_priv->savePP_DIVISOR);*/
327 REG_WRITE(PP_CYCLE, lvds_priv->savePP_CYCLE);
328 REG_WRITE(PP_CONTROL, lvds_priv->savePP_CONTROL);
329 REG_WRITE(LVDS, lvds_priv->saveLVDS);
330
331 if (lvds_priv->savePP_CONTROL & POWER_TARGET_ON) {
332 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) |
333 POWER_TARGET_ON);
334 do {
335 pp_status = REG_READ(PP_STATUS);
336 } while ((pp_status & PP_ON) == 0);
337 } else {
338 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) &
339 ~POWER_TARGET_ON);
340 do {
341 pp_status = REG_READ(PP_STATUS);
342 } while (pp_status & PP_ON);
343 }
344}
345
346int psb_intel_lvds_mode_valid(struct drm_connector *connector,
347 struct drm_display_mode *mode)
348{
349 struct drm_psb_private *dev_priv = connector->dev->dev_private;
350 struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
351 struct drm_display_mode *fixed_mode =
352 dev_priv->mode_dev.panel_fixed_mode;
353
354 if (gma_encoder->type == INTEL_OUTPUT_MIPI2)
355 fixed_mode = dev_priv->mode_dev.panel_fixed_mode2;
356
357 /* just in case */
358 if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
359 return MODE_NO_DBLESCAN;
360
361 /* just in case */
362 if (mode->flags & DRM_MODE_FLAG_INTERLACE)
363 return MODE_NO_INTERLACE;
364
365 if (fixed_mode) {
366 if (mode->hdisplay > fixed_mode->hdisplay)
367 return MODE_PANEL;
368 if (mode->vdisplay > fixed_mode->vdisplay)
369 return MODE_PANEL;
370 }
371 return MODE_OK;
372}
373
374bool psb_intel_lvds_mode_fixup(struct drm_encoder *encoder,
375 const struct drm_display_mode *mode,
376 struct drm_display_mode *adjusted_mode)
377{
378 struct drm_device *dev = encoder->dev;
379 struct drm_psb_private *dev_priv = dev->dev_private;
380 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
381 struct gma_crtc *gma_crtc = to_gma_crtc(encoder->crtc);
382 struct drm_encoder *tmp_encoder;
383 struct drm_display_mode *panel_fixed_mode = mode_dev->panel_fixed_mode;
384 struct gma_encoder *gma_encoder = to_gma_encoder(encoder);
385
386 if (gma_encoder->type == INTEL_OUTPUT_MIPI2)
387 panel_fixed_mode = mode_dev->panel_fixed_mode2;
388
389 /* PSB requires the LVDS is on pipe B, MRST has only one pipe anyway */
390 if (!IS_MRST(dev) && gma_crtc->pipe == 0) {
391 printk(KERN_ERR "Can't support LVDS on pipe A\n");
392 return false;
393 }
394 if (IS_MRST(dev) && gma_crtc->pipe != 0) {
395 printk(KERN_ERR "Must use PIPE A\n");
396 return false;
397 }
398 /* Should never happen!! */
399 list_for_each_entry(tmp_encoder, &dev->mode_config.encoder_list,
400 head) {
401 if (tmp_encoder != encoder
402 && tmp_encoder->crtc == encoder->crtc) {
403 printk(KERN_ERR "Can't enable LVDS and another "
404 "encoder on the same pipe\n");
405 return false;
406 }
407 }
408
409 /*
410 * If we have timings from the BIOS for the panel, put them in
411 * to the adjusted mode. The CRTC will be set up for this mode,
412 * with the panel scaling set up to source from the H/VDisplay
413 * of the original mode.
414 */
415 if (panel_fixed_mode != NULL) {
416 adjusted_mode->hdisplay = panel_fixed_mode->hdisplay;
417 adjusted_mode->hsync_start = panel_fixed_mode->hsync_start;
418 adjusted_mode->hsync_end = panel_fixed_mode->hsync_end;
419 adjusted_mode->htotal = panel_fixed_mode->htotal;
420 adjusted_mode->vdisplay = panel_fixed_mode->vdisplay;
421 adjusted_mode->vsync_start = panel_fixed_mode->vsync_start;
422 adjusted_mode->vsync_end = panel_fixed_mode->vsync_end;
423 adjusted_mode->vtotal = panel_fixed_mode->vtotal;
424 adjusted_mode->clock = panel_fixed_mode->clock;
425 drm_mode_set_crtcinfo(adjusted_mode,
426 CRTC_INTERLACE_HALVE_V);
427 }
428
429 /*
430 * XXX: It would be nice to support lower refresh rates on the
431 * panels to reduce power consumption, and perhaps match the
432 * user's requested refresh rate.
433 */
434
435 return true;
436}
437
438static void psb_intel_lvds_prepare(struct drm_encoder *encoder)
439{
440 struct drm_device *dev = encoder->dev;
441 struct drm_psb_private *dev_priv = dev->dev_private;
442 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
443
444 if (!gma_power_begin(dev, true))
445 return;
446
447 mode_dev->saveBLC_PWM_CTL = REG_READ(BLC_PWM_CTL);
448 mode_dev->backlight_duty_cycle = (mode_dev->saveBLC_PWM_CTL &
449 BACKLIGHT_DUTY_CYCLE_MASK);
450
451 psb_intel_lvds_set_power(dev, false);
452
453 gma_power_end(dev);
454}
455
456static void psb_intel_lvds_commit(struct drm_encoder *encoder)
457{
458 struct drm_device *dev = encoder->dev;
459 struct drm_psb_private *dev_priv = dev->dev_private;
460 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
461
462 if (mode_dev->backlight_duty_cycle == 0)
463 mode_dev->backlight_duty_cycle =
464 psb_intel_lvds_get_max_backlight(dev);
465
466 psb_intel_lvds_set_power(dev, true);
467}
468
469static void psb_intel_lvds_mode_set(struct drm_encoder *encoder,
470 struct drm_display_mode *mode,
471 struct drm_display_mode *adjusted_mode)
472{
473 struct drm_device *dev = encoder->dev;
474 struct drm_psb_private *dev_priv = dev->dev_private;
475 u32 pfit_control;
476
477 /*
478 * The LVDS pin pair will already have been turned on in the
479 * psb_intel_crtc_mode_set since it has a large impact on the DPLL
480 * settings.
481 */
482
483 /*
484 * Enable automatic panel scaling so that non-native modes fill the
485 * screen. Should be enabled before the pipe is enabled, according to
486 * register description and PRM.
487 */
488 if (mode->hdisplay != adjusted_mode->hdisplay ||
489 mode->vdisplay != adjusted_mode->vdisplay)
490 pfit_control = (PFIT_ENABLE | VERT_AUTO_SCALE |
491 HORIZ_AUTO_SCALE | VERT_INTERP_BILINEAR |
492 HORIZ_INTERP_BILINEAR);
493 else
494 pfit_control = 0;
495
496 if (dev_priv->lvds_dither)
497 pfit_control |= PANEL_8TO6_DITHER_ENABLE;
498
499 REG_WRITE(PFIT_CONTROL, pfit_control);
500}
501
502/*
503 * Detect the LVDS connection.
504 *
505 * This always returns CONNECTOR_STATUS_CONNECTED.
506 * This connector should only have
507 * been set up if the LVDS was actually connected anyway.
508 */
509static enum drm_connector_status psb_intel_lvds_detect(struct drm_connector
510 *connector, bool force)
511{
512 return connector_status_connected;
513}
514
515/*
516 * Return the list of DDC modes if available, or the BIOS fixed mode otherwise.
517 */
518static int psb_intel_lvds_get_modes(struct drm_connector *connector)
519{
520 struct drm_device *dev = connector->dev;
521 struct drm_psb_private *dev_priv = dev->dev_private;
522 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
523 struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
524 struct psb_intel_lvds_priv *lvds_priv = gma_encoder->dev_priv;
525 int ret = 0;
526
527 if (!IS_MRST(dev))
528 ret = psb_intel_ddc_get_modes(connector, &lvds_priv->i2c_bus->adapter);
529
530 if (ret)
531 return ret;
532
533 /* Didn't get an EDID, so
534 * Set wide sync ranges so we get all modes
535 * handed to valid_mode for checking
536 */
537 connector->display_info.min_vfreq = 0;
538 connector->display_info.max_vfreq = 200;
539 connector->display_info.min_hfreq = 0;
540 connector->display_info.max_hfreq = 200;
541
542 if (mode_dev->panel_fixed_mode != NULL) {
543 struct drm_display_mode *mode =
544 drm_mode_duplicate(dev, mode_dev->panel_fixed_mode);
545 drm_mode_probed_add(connector, mode);
546 return 1;
547 }
548
549 return 0;
550}
551
552/**
553 * psb_intel_lvds_destroy - unregister and free LVDS structures
554 * @connector: connector to free
555 *
556 * Unregister the DDC bus for this connector then free the driver private
557 * structure.
558 */
559void psb_intel_lvds_destroy(struct drm_connector *connector)
560{
561 struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
562 struct psb_intel_lvds_priv *lvds_priv = gma_encoder->dev_priv;
563
564 if (lvds_priv->ddc_bus)
565 psb_intel_i2c_destroy(lvds_priv->ddc_bus);
566 drm_connector_unregister(connector);
567 drm_connector_cleanup(connector);
568 kfree(connector);
569}
570
571int psb_intel_lvds_set_property(struct drm_connector *connector,
572 struct drm_property *property,
573 uint64_t value)
574{
575 struct drm_encoder *encoder = connector->encoder;
576
577 if (!encoder)
578 return -1;
579
580 if (!strcmp(property->name, "scaling mode")) {
581 struct gma_crtc *crtc = to_gma_crtc(encoder->crtc);
582 uint64_t curval;
583
584 if (!crtc)
585 goto set_prop_error;
586
587 switch (value) {
588 case DRM_MODE_SCALE_FULLSCREEN:
589 break;
590 case DRM_MODE_SCALE_NO_SCALE:
591 break;
592 case DRM_MODE_SCALE_ASPECT:
593 break;
594 default:
595 goto set_prop_error;
596 }
597
598 if (drm_object_property_get_value(&connector->base,
599 property,
600 &curval))
601 goto set_prop_error;
602
603 if (curval == value)
604 goto set_prop_done;
605
606 if (drm_object_property_set_value(&connector->base,
607 property,
608 value))
609 goto set_prop_error;
610
611 if (crtc->saved_mode.hdisplay != 0 &&
612 crtc->saved_mode.vdisplay != 0) {
613 if (!drm_crtc_helper_set_mode(encoder->crtc,
614 &crtc->saved_mode,
615 encoder->crtc->x,
616 encoder->crtc->y,
617 encoder->crtc->primary->fb))
618 goto set_prop_error;
619 }
620 } else if (!strcmp(property->name, "backlight")) {
621 if (drm_object_property_set_value(&connector->base,
622 property,
623 value))
624 goto set_prop_error;
625 else
626 gma_backlight_set(encoder->dev, value);
627 } else if (!strcmp(property->name, "DPMS")) {
628 const struct drm_encoder_helper_funcs *hfuncs
629 = encoder->helper_private;
630 hfuncs->dpms(encoder, value);
631 }
632
633set_prop_done:
634 return 0;
635set_prop_error:
636 return -1;
637}
638
639static const struct drm_encoder_helper_funcs psb_intel_lvds_helper_funcs = {
640 .dpms = psb_intel_lvds_encoder_dpms,
641 .mode_fixup = psb_intel_lvds_mode_fixup,
642 .prepare = psb_intel_lvds_prepare,
643 .mode_set = psb_intel_lvds_mode_set,
644 .commit = psb_intel_lvds_commit,
645};
646
647const struct drm_connector_helper_funcs
648 psb_intel_lvds_connector_helper_funcs = {
649 .get_modes = psb_intel_lvds_get_modes,
650 .mode_valid = psb_intel_lvds_mode_valid,
651 .best_encoder = gma_best_encoder,
652};
653
654const struct drm_connector_funcs psb_intel_lvds_connector_funcs = {
655 .dpms = drm_helper_connector_dpms,
656 .detect = psb_intel_lvds_detect,
657 .fill_modes = drm_helper_probe_single_connector_modes,
658 .set_property = psb_intel_lvds_set_property,
659 .destroy = psb_intel_lvds_destroy,
660};
661
662
663static void psb_intel_lvds_enc_destroy(struct drm_encoder *encoder)
664{
665 drm_encoder_cleanup(encoder);
666}
667
668const struct drm_encoder_funcs psb_intel_lvds_enc_funcs = {
669 .destroy = psb_intel_lvds_enc_destroy,
670};
671
672
673
674/**
675 * psb_intel_lvds_init - setup LVDS connectors on this device
676 * @dev: drm device
677 *
678 * Create the connector, register the LVDS DDC bus, and try to figure out what
679 * modes we can display on the LVDS panel (if present).
680 */
681void psb_intel_lvds_init(struct drm_device *dev,
682 struct psb_intel_mode_device *mode_dev)
683{
684 struct gma_encoder *gma_encoder;
685 struct gma_connector *gma_connector;
686 struct psb_intel_lvds_priv *lvds_priv;
687 struct drm_connector *connector;
688 struct drm_encoder *encoder;
689 struct drm_display_mode *scan; /* *modes, *bios_mode; */
690 struct drm_crtc *crtc;
691 struct drm_psb_private *dev_priv = dev->dev_private;
692 u32 lvds;
693 int pipe;
694
695 gma_encoder = kzalloc(sizeof(struct gma_encoder), GFP_KERNEL);
696 if (!gma_encoder) {
697 dev_err(dev->dev, "gma_encoder allocation error\n");
698 return;
699 }
700
701 gma_connector = kzalloc(sizeof(struct gma_connector), GFP_KERNEL);
702 if (!gma_connector) {
703 dev_err(dev->dev, "gma_connector allocation error\n");
704 goto failed_encoder;
705 }
706
707 lvds_priv = kzalloc(sizeof(struct psb_intel_lvds_priv), GFP_KERNEL);
708 if (!lvds_priv) {
709 dev_err(dev->dev, "LVDS private allocation error\n");
710 goto failed_connector;
711 }
712
713 gma_encoder->dev_priv = lvds_priv;
714
715 connector = &gma_connector->base;
716 gma_connector->save = psb_intel_lvds_save;
717 gma_connector->restore = psb_intel_lvds_restore;
718
719 encoder = &gma_encoder->base;
720 drm_connector_init(dev, connector,
721 &psb_intel_lvds_connector_funcs,
722 DRM_MODE_CONNECTOR_LVDS);
723
724 drm_encoder_init(dev, encoder,
725 &psb_intel_lvds_enc_funcs,
726 DRM_MODE_ENCODER_LVDS, NULL);
727
728 gma_connector_attach_encoder(gma_connector, gma_encoder);
729 gma_encoder->type = INTEL_OUTPUT_LVDS;
730
731 drm_encoder_helper_add(encoder, &psb_intel_lvds_helper_funcs);
732 drm_connector_helper_add(connector,
733 &psb_intel_lvds_connector_helper_funcs);
734 connector->display_info.subpixel_order = SubPixelHorizontalRGB;
735 connector->interlace_allowed = false;
736 connector->doublescan_allowed = false;
737
738 /*Attach connector properties*/
739 drm_object_attach_property(&connector->base,
740 dev->mode_config.scaling_mode_property,
741 DRM_MODE_SCALE_FULLSCREEN);
742 drm_object_attach_property(&connector->base,
743 dev_priv->backlight_property,
744 BRIGHTNESS_MAX_LEVEL);
745
746 /*
747 * Set up I2C bus
748 * FIXME: distroy i2c_bus when exit
749 */
750 lvds_priv->i2c_bus = psb_intel_i2c_create(dev, GPIOB, "LVDSBLC_B");
751 if (!lvds_priv->i2c_bus) {
752 dev_printk(KERN_ERR,
753 &dev->pdev->dev, "I2C bus registration failed.\n");
754 goto failed_blc_i2c;
755 }
756 lvds_priv->i2c_bus->slave_addr = 0x2C;
757 dev_priv->lvds_i2c_bus = lvds_priv->i2c_bus;
758
759 /*
760 * LVDS discovery:
761 * 1) check for EDID on DDC
762 * 2) check for VBT data
763 * 3) check to see if LVDS is already on
764 * if none of the above, no panel
765 * 4) make sure lid is open
766 * if closed, act like it's not there for now
767 */
768
769 /* Set up the DDC bus. */
770 lvds_priv->ddc_bus = psb_intel_i2c_create(dev, GPIOC, "LVDSDDC_C");
771 if (!lvds_priv->ddc_bus) {
772 dev_printk(KERN_ERR, &dev->pdev->dev,
773 "DDC bus registration " "failed.\n");
774 goto failed_ddc;
775 }
776
777 /*
778 * Attempt to get the fixed panel mode from DDC. Assume that the
779 * preferred mode is the right one.
780 */
781 mutex_lock(&dev->mode_config.mutex);
782 psb_intel_ddc_get_modes(connector, &lvds_priv->ddc_bus->adapter);
783 list_for_each_entry(scan, &connector->probed_modes, head) {
784 if (scan->type & DRM_MODE_TYPE_PREFERRED) {
785 mode_dev->panel_fixed_mode =
786 drm_mode_duplicate(dev, scan);
787 goto out; /* FIXME: check for quirks */
788 }
789 }
790
791 /* Failed to get EDID, what about VBT? do we need this? */
792 if (mode_dev->vbt_mode)
793 mode_dev->panel_fixed_mode =
794 drm_mode_duplicate(dev, mode_dev->vbt_mode);
795
796 if (!mode_dev->panel_fixed_mode)
797 if (dev_priv->lfp_lvds_vbt_mode)
798 mode_dev->panel_fixed_mode =
799 drm_mode_duplicate(dev,
800 dev_priv->lfp_lvds_vbt_mode);
801
802 /*
803 * If we didn't get EDID, try checking if the panel is already turned
804 * on. If so, assume that whatever is currently programmed is the
805 * correct mode.
806 */
807 lvds = REG_READ(LVDS);
808 pipe = (lvds & LVDS_PIPEB_SELECT) ? 1 : 0;
809 crtc = psb_intel_get_crtc_from_pipe(dev, pipe);
810
811 if (crtc && (lvds & LVDS_PORT_EN)) {
812 mode_dev->panel_fixed_mode =
813 psb_intel_crtc_mode_get(dev, crtc);
814 if (mode_dev->panel_fixed_mode) {
815 mode_dev->panel_fixed_mode->type |=
816 DRM_MODE_TYPE_PREFERRED;
817 goto out; /* FIXME: check for quirks */
818 }
819 }
820
821 /* If we still don't have a mode after all that, give up. */
822 if (!mode_dev->panel_fixed_mode) {
823 dev_err(dev->dev, "Found no modes on the lvds, ignoring the LVDS\n");
824 goto failed_find;
825 }
826
827 /*
828 * Blacklist machines with BIOSes that list an LVDS panel without
829 * actually having one.
830 */
831out:
832 mutex_unlock(&dev->mode_config.mutex);
833 drm_connector_register(connector);
834 return;
835
836failed_find:
837 mutex_unlock(&dev->mode_config.mutex);
838 if (lvds_priv->ddc_bus)
839 psb_intel_i2c_destroy(lvds_priv->ddc_bus);
840failed_ddc:
841 if (lvds_priv->i2c_bus)
842 psb_intel_i2c_destroy(lvds_priv->i2c_bus);
843failed_blc_i2c:
844 drm_encoder_cleanup(encoder);
845 drm_connector_cleanup(connector);
846failed_connector:
847 kfree(gma_connector);
848failed_encoder:
849 kfree(gma_encoder);
850}
851