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
50 struct 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 */
psb_intel_lvds_get_max_backlight(struct drm_device * dev)71 static 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 */
psb_lvds_i2c_set_brightness(struct drm_device * dev,unsigned int level)99 static 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
psb_lvds_pwm_set_brightness(struct drm_device * dev,int level)140 static 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 */
psb_intel_lvds_set_brightness(struct drm_device * dev,int level)173 void 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 */
psb_intel_lvds_set_backlight(struct drm_device * dev,int level)195 static 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 */
psb_intel_lvds_set_power(struct drm_device * dev,bool on)220 static 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
psb_intel_lvds_encoder_dpms(struct drm_encoder * encoder,int mode)253 static 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
psb_intel_lvds_save(struct drm_connector * connector)265 static 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
psb_intel_lvds_restore(struct drm_connector * connector)305 static 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
psb_intel_lvds_mode_valid(struct drm_connector * connector,struct drm_display_mode * mode)346 enum drm_mode_status 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
psb_intel_lvds_mode_fixup(struct drm_encoder * encoder,const struct drm_display_mode * mode,struct drm_display_mode * adjusted_mode)374 bool 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
psb_intel_lvds_prepare(struct drm_encoder * encoder)438 static 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
psb_intel_lvds_commit(struct drm_encoder * encoder)456 static 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
psb_intel_lvds_mode_set(struct drm_encoder * encoder,struct drm_display_mode * mode,struct drm_display_mode * adjusted_mode)469 static 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 */
psb_intel_lvds_detect(struct drm_connector * connector,bool force)509 static 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 */
psb_intel_lvds_get_modes(struct drm_connector * connector)518 static 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 */
psb_intel_lvds_destroy(struct drm_connector * connector)559 void 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
psb_intel_lvds_set_property(struct drm_connector * connector,struct drm_property * property,uint64_t value)571 int 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
633 set_prop_done:
634 return 0;
635 set_prop_error:
636 return -1;
637 }
638
639 static 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
647 const 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
654 const struct drm_connector_funcs psb_intel_lvds_connector_funcs = {
655 .dpms = drm_helper_connector_dpms,
656 .save = psb_intel_lvds_save,
657 .restore = psb_intel_lvds_restore,
658 .detect = psb_intel_lvds_detect,
659 .fill_modes = drm_helper_probe_single_connector_modes,
660 .set_property = psb_intel_lvds_set_property,
661 .destroy = psb_intel_lvds_destroy,
662 };
663
664
psb_intel_lvds_enc_destroy(struct drm_encoder * encoder)665 static void psb_intel_lvds_enc_destroy(struct drm_encoder *encoder)
666 {
667 drm_encoder_cleanup(encoder);
668 }
669
670 const struct drm_encoder_funcs psb_intel_lvds_enc_funcs = {
671 .destroy = psb_intel_lvds_enc_destroy,
672 };
673
674
675
676 /**
677 * psb_intel_lvds_init - setup LVDS connectors on this device
678 * @dev: drm device
679 *
680 * Create the connector, register the LVDS DDC bus, and try to figure out what
681 * modes we can display on the LVDS panel (if present).
682 */
psb_intel_lvds_init(struct drm_device * dev,struct psb_intel_mode_device * mode_dev)683 void psb_intel_lvds_init(struct drm_device *dev,
684 struct psb_intel_mode_device *mode_dev)
685 {
686 struct gma_encoder *gma_encoder;
687 struct gma_connector *gma_connector;
688 struct psb_intel_lvds_priv *lvds_priv;
689 struct drm_connector *connector;
690 struct drm_encoder *encoder;
691 struct drm_display_mode *scan; /* *modes, *bios_mode; */
692 struct drm_crtc *crtc;
693 struct drm_psb_private *dev_priv = dev->dev_private;
694 u32 lvds;
695 int pipe;
696
697 gma_encoder = kzalloc(sizeof(struct gma_encoder), GFP_KERNEL);
698 if (!gma_encoder) {
699 dev_err(dev->dev, "gma_encoder allocation error\n");
700 return;
701 }
702
703 gma_connector = kzalloc(sizeof(struct gma_connector), GFP_KERNEL);
704 if (!gma_connector) {
705 dev_err(dev->dev, "gma_connector allocation error\n");
706 goto failed_encoder;
707 }
708
709 lvds_priv = kzalloc(sizeof(struct psb_intel_lvds_priv), GFP_KERNEL);
710 if (!lvds_priv) {
711 dev_err(dev->dev, "LVDS private allocation error\n");
712 goto failed_connector;
713 }
714
715 gma_encoder->dev_priv = lvds_priv;
716
717 connector = &gma_connector->base;
718 encoder = &gma_encoder->base;
719 drm_connector_init(dev, connector,
720 &psb_intel_lvds_connector_funcs,
721 DRM_MODE_CONNECTOR_LVDS);
722
723 drm_encoder_init(dev, encoder,
724 &psb_intel_lvds_enc_funcs,
725 DRM_MODE_ENCODER_LVDS);
726
727 gma_connector_attach_encoder(gma_connector, gma_encoder);
728 gma_encoder->type = INTEL_OUTPUT_LVDS;
729
730 drm_encoder_helper_add(encoder, &psb_intel_lvds_helper_funcs);
731 drm_connector_helper_add(connector,
732 &psb_intel_lvds_connector_helper_funcs);
733 connector->display_info.subpixel_order = SubPixelHorizontalRGB;
734 connector->interlace_allowed = false;
735 connector->doublescan_allowed = false;
736
737 /*Attach connector properties*/
738 drm_object_attach_property(&connector->base,
739 dev->mode_config.scaling_mode_property,
740 DRM_MODE_SCALE_FULLSCREEN);
741 drm_object_attach_property(&connector->base,
742 dev_priv->backlight_property,
743 BRIGHTNESS_MAX_LEVEL);
744
745 /*
746 * Set up I2C bus
747 * FIXME: distroy i2c_bus when exit
748 */
749 lvds_priv->i2c_bus = psb_intel_i2c_create(dev, GPIOB, "LVDSBLC_B");
750 if (!lvds_priv->i2c_bus) {
751 dev_printk(KERN_ERR,
752 &dev->pdev->dev, "I2C bus registration failed.\n");
753 goto failed_blc_i2c;
754 }
755 lvds_priv->i2c_bus->slave_addr = 0x2C;
756 dev_priv->lvds_i2c_bus = lvds_priv->i2c_bus;
757
758 /*
759 * LVDS discovery:
760 * 1) check for EDID on DDC
761 * 2) check for VBT data
762 * 3) check to see if LVDS is already on
763 * if none of the above, no panel
764 * 4) make sure lid is open
765 * if closed, act like it's not there for now
766 */
767
768 /* Set up the DDC bus. */
769 lvds_priv->ddc_bus = psb_intel_i2c_create(dev, GPIOC, "LVDSDDC_C");
770 if (!lvds_priv->ddc_bus) {
771 dev_printk(KERN_ERR, &dev->pdev->dev,
772 "DDC bus registration " "failed.\n");
773 goto failed_ddc;
774 }
775
776 /*
777 * Attempt to get the fixed panel mode from DDC. Assume that the
778 * preferred mode is the right one.
779 */
780 mutex_lock(&dev->mode_config.mutex);
781 psb_intel_ddc_get_modes(connector, &lvds_priv->ddc_bus->adapter);
782 list_for_each_entry(scan, &connector->probed_modes, head) {
783 if (scan->type & DRM_MODE_TYPE_PREFERRED) {
784 mode_dev->panel_fixed_mode =
785 drm_mode_duplicate(dev, scan);
786 DRM_DEBUG_KMS("Using mode from DDC\n");
787 goto out; /* FIXME: check for quirks */
788 }
789 }
790
791 /* Failed to get EDID, what about VBT? do we need this? */
792 if (dev_priv->lfp_lvds_vbt_mode) {
793 mode_dev->panel_fixed_mode =
794 drm_mode_duplicate(dev, dev_priv->lfp_lvds_vbt_mode);
795
796 if (mode_dev->panel_fixed_mode) {
797 mode_dev->panel_fixed_mode->type |=
798 DRM_MODE_TYPE_PREFERRED;
799 DRM_DEBUG_KMS("Using mode from VBT\n");
800 goto out;
801 }
802 }
803
804 /*
805 * If we didn't get EDID, try checking if the panel is already turned
806 * on. If so, assume that whatever is currently programmed is the
807 * correct mode.
808 */
809 lvds = REG_READ(LVDS);
810 pipe = (lvds & LVDS_PIPEB_SELECT) ? 1 : 0;
811 crtc = psb_intel_get_crtc_from_pipe(dev, pipe);
812
813 if (crtc && (lvds & LVDS_PORT_EN)) {
814 mode_dev->panel_fixed_mode =
815 psb_intel_crtc_mode_get(dev, crtc);
816 if (mode_dev->panel_fixed_mode) {
817 mode_dev->panel_fixed_mode->type |=
818 DRM_MODE_TYPE_PREFERRED;
819 DRM_DEBUG_KMS("Using pre-programmed mode\n");
820 goto out; /* FIXME: check for quirks */
821 }
822 }
823
824 /* If we still don't have a mode after all that, give up. */
825 if (!mode_dev->panel_fixed_mode) {
826 dev_err(dev->dev, "Found no modes on the lvds, ignoring the LVDS\n");
827 goto failed_find;
828 }
829
830 /*
831 * Blacklist machines with BIOSes that list an LVDS panel without
832 * actually having one.
833 */
834 out:
835 mutex_unlock(&dev->mode_config.mutex);
836 drm_connector_register(connector);
837 return;
838
839 failed_find:
840 mutex_unlock(&dev->mode_config.mutex);
841 if (lvds_priv->ddc_bus)
842 psb_intel_i2c_destroy(lvds_priv->ddc_bus);
843 failed_ddc:
844 if (lvds_priv->i2c_bus)
845 psb_intel_i2c_destroy(lvds_priv->i2c_bus);
846 failed_blc_i2c:
847 drm_encoder_cleanup(encoder);
848 drm_connector_cleanup(connector);
849 failed_connector:
850 kfree(gma_connector);
851 failed_encoder:
852 kfree(gma_encoder);
853 }
854
855