1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright © 2006-2011 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/dmi.h>
12 #include <linux/i2c.h>
13 #include <linux/pm_runtime.h>
14
15 #include <drm/drm_crtc_helper.h>
16 #include <drm/drm_modeset_helper_vtables.h>
17 #include <drm/drm_simple_kms_helper.h>
18
19 #include "cdv_device.h"
20 #include "intel_bios.h"
21 #include "power.h"
22 #include "psb_drv.h"
23 #include "psb_intel_drv.h"
24 #include "psb_intel_reg.h"
25
26 /*
27 * LVDS I2C backlight control macros
28 */
29 #define BRIGHTNESS_MAX_LEVEL 100
30 #define BRIGHTNESS_MASK 0xFF
31 #define BLC_I2C_TYPE 0x01
32 #define BLC_PWM_TYPT 0x02
33
34 #define BLC_POLARITY_NORMAL 0
35 #define BLC_POLARITY_INVERSE 1
36
37 #define PSB_BLC_MAX_PWM_REG_FREQ (0xFFFE)
38 #define PSB_BLC_MIN_PWM_REG_FREQ (0x2)
39 #define PSB_BLC_PWM_PRECISION_FACTOR (10)
40 #define PSB_BACKLIGHT_PWM_CTL_SHIFT (16)
41 #define PSB_BACKLIGHT_PWM_POLARITY_BIT_CLEAR (0xFFFE)
42
43 struct cdv_intel_lvds_priv {
44 /**
45 * Saved LVDO output states
46 */
47 uint32_t savePP_ON;
48 uint32_t savePP_OFF;
49 uint32_t saveLVDS;
50 uint32_t savePP_CONTROL;
51 uint32_t savePP_CYCLE;
52 uint32_t savePFIT_CONTROL;
53 uint32_t savePFIT_PGM_RATIOS;
54 uint32_t saveBLC_PWM_CTL;
55 };
56
57 /*
58 * Returns the maximum level of the backlight duty cycle field.
59 */
cdv_intel_lvds_get_max_backlight(struct drm_device * dev)60 static u32 cdv_intel_lvds_get_max_backlight(struct drm_device *dev)
61 {
62 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
63 u32 retval;
64
65 if (gma_power_begin(dev, false)) {
66 retval = ((REG_READ(BLC_PWM_CTL) &
67 BACKLIGHT_MODULATION_FREQ_MASK) >>
68 BACKLIGHT_MODULATION_FREQ_SHIFT) * 2;
69
70 gma_power_end(dev);
71 } else
72 retval = ((dev_priv->regs.saveBLC_PWM_CTL &
73 BACKLIGHT_MODULATION_FREQ_MASK) >>
74 BACKLIGHT_MODULATION_FREQ_SHIFT) * 2;
75
76 return retval;
77 }
78
79 /*
80 * Sets the backlight level.
81 *
82 * level backlight level, from 0 to cdv_intel_lvds_get_max_backlight().
83 */
cdv_intel_lvds_set_backlight(struct drm_device * dev,int level)84 static void cdv_intel_lvds_set_backlight(struct drm_device *dev, int level)
85 {
86 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
87 u32 blc_pwm_ctl;
88
89 if (gma_power_begin(dev, false)) {
90 blc_pwm_ctl =
91 REG_READ(BLC_PWM_CTL) & ~BACKLIGHT_DUTY_CYCLE_MASK;
92 REG_WRITE(BLC_PWM_CTL,
93 (blc_pwm_ctl |
94 (level << BACKLIGHT_DUTY_CYCLE_SHIFT)));
95 gma_power_end(dev);
96 } else {
97 blc_pwm_ctl = dev_priv->regs.saveBLC_PWM_CTL &
98 ~BACKLIGHT_DUTY_CYCLE_MASK;
99 dev_priv->regs.saveBLC_PWM_CTL = (blc_pwm_ctl |
100 (level << BACKLIGHT_DUTY_CYCLE_SHIFT));
101 }
102 }
103
104 /*
105 * Sets the power state for the panel.
106 */
cdv_intel_lvds_set_power(struct drm_device * dev,struct drm_encoder * encoder,bool on)107 static void cdv_intel_lvds_set_power(struct drm_device *dev,
108 struct drm_encoder *encoder, bool on)
109 {
110 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
111 u32 pp_status;
112
113 if (!gma_power_begin(dev, true))
114 return;
115
116 if (on) {
117 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) |
118 POWER_TARGET_ON);
119 do {
120 pp_status = REG_READ(PP_STATUS);
121 } while ((pp_status & PP_ON) == 0);
122
123 cdv_intel_lvds_set_backlight(dev,
124 dev_priv->mode_dev.backlight_duty_cycle);
125 } else {
126 cdv_intel_lvds_set_backlight(dev, 0);
127
128 REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) &
129 ~POWER_TARGET_ON);
130 do {
131 pp_status = REG_READ(PP_STATUS);
132 } while (pp_status & PP_ON);
133 }
134 gma_power_end(dev);
135 }
136
cdv_intel_lvds_encoder_dpms(struct drm_encoder * encoder,int mode)137 static void cdv_intel_lvds_encoder_dpms(struct drm_encoder *encoder, int mode)
138 {
139 struct drm_device *dev = encoder->dev;
140 if (mode == DRM_MODE_DPMS_ON)
141 cdv_intel_lvds_set_power(dev, encoder, true);
142 else
143 cdv_intel_lvds_set_power(dev, encoder, false);
144 /* XXX: We never power down the LVDS pairs. */
145 }
146
cdv_intel_lvds_save(struct drm_connector * connector)147 static void cdv_intel_lvds_save(struct drm_connector *connector)
148 {
149 }
150
cdv_intel_lvds_restore(struct drm_connector * connector)151 static void cdv_intel_lvds_restore(struct drm_connector *connector)
152 {
153 }
154
cdv_intel_lvds_mode_valid(struct drm_connector * connector,struct drm_display_mode * mode)155 static enum drm_mode_status cdv_intel_lvds_mode_valid(struct drm_connector *connector,
156 struct drm_display_mode *mode)
157 {
158 struct drm_device *dev = connector->dev;
159 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
160 struct drm_display_mode *fixed_mode =
161 dev_priv->mode_dev.panel_fixed_mode;
162
163 /* just in case */
164 if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
165 return MODE_NO_DBLESCAN;
166
167 /* just in case */
168 if (mode->flags & DRM_MODE_FLAG_INTERLACE)
169 return MODE_NO_INTERLACE;
170
171 if (fixed_mode) {
172 if (mode->hdisplay > fixed_mode->hdisplay)
173 return MODE_PANEL;
174 if (mode->vdisplay > fixed_mode->vdisplay)
175 return MODE_PANEL;
176 }
177 return MODE_OK;
178 }
179
cdv_intel_lvds_mode_fixup(struct drm_encoder * encoder,const struct drm_display_mode * mode,struct drm_display_mode * adjusted_mode)180 static bool cdv_intel_lvds_mode_fixup(struct drm_encoder *encoder,
181 const struct drm_display_mode *mode,
182 struct drm_display_mode *adjusted_mode)
183 {
184 struct drm_device *dev = encoder->dev;
185 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
186 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
187 struct drm_encoder *tmp_encoder;
188 struct drm_display_mode *panel_fixed_mode = mode_dev->panel_fixed_mode;
189
190 /* Should never happen!! */
191 list_for_each_entry(tmp_encoder, &dev->mode_config.encoder_list,
192 head) {
193 if (tmp_encoder != encoder
194 && tmp_encoder->crtc == encoder->crtc) {
195 pr_err("Can't enable LVDS and another encoder on the same pipe\n");
196 return false;
197 }
198 }
199
200 /*
201 * If we have timings from the BIOS for the panel, put them in
202 * to the adjusted mode. The CRTC will be set up for this mode,
203 * with the panel scaling set up to source from the H/VDisplay
204 * of the original mode.
205 */
206 if (panel_fixed_mode != NULL) {
207 adjusted_mode->hdisplay = panel_fixed_mode->hdisplay;
208 adjusted_mode->hsync_start = panel_fixed_mode->hsync_start;
209 adjusted_mode->hsync_end = panel_fixed_mode->hsync_end;
210 adjusted_mode->htotal = panel_fixed_mode->htotal;
211 adjusted_mode->vdisplay = panel_fixed_mode->vdisplay;
212 adjusted_mode->vsync_start = panel_fixed_mode->vsync_start;
213 adjusted_mode->vsync_end = panel_fixed_mode->vsync_end;
214 adjusted_mode->vtotal = panel_fixed_mode->vtotal;
215 adjusted_mode->clock = panel_fixed_mode->clock;
216 drm_mode_set_crtcinfo(adjusted_mode,
217 CRTC_INTERLACE_HALVE_V);
218 }
219
220 /*
221 * XXX: It would be nice to support lower refresh rates on the
222 * panels to reduce power consumption, and perhaps match the
223 * user's requested refresh rate.
224 */
225
226 return true;
227 }
228
cdv_intel_lvds_prepare(struct drm_encoder * encoder)229 static void cdv_intel_lvds_prepare(struct drm_encoder *encoder)
230 {
231 struct drm_device *dev = encoder->dev;
232 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
233 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
234
235 if (!gma_power_begin(dev, true))
236 return;
237
238 mode_dev->saveBLC_PWM_CTL = REG_READ(BLC_PWM_CTL);
239 mode_dev->backlight_duty_cycle = (mode_dev->saveBLC_PWM_CTL &
240 BACKLIGHT_DUTY_CYCLE_MASK);
241
242 cdv_intel_lvds_set_power(dev, encoder, false);
243
244 gma_power_end(dev);
245 }
246
cdv_intel_lvds_commit(struct drm_encoder * encoder)247 static void cdv_intel_lvds_commit(struct drm_encoder *encoder)
248 {
249 struct drm_device *dev = encoder->dev;
250 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
251 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
252
253 if (mode_dev->backlight_duty_cycle == 0)
254 mode_dev->backlight_duty_cycle =
255 cdv_intel_lvds_get_max_backlight(dev);
256
257 cdv_intel_lvds_set_power(dev, encoder, true);
258 }
259
cdv_intel_lvds_mode_set(struct drm_encoder * encoder,struct drm_display_mode * mode,struct drm_display_mode * adjusted_mode)260 static void cdv_intel_lvds_mode_set(struct drm_encoder *encoder,
261 struct drm_display_mode *mode,
262 struct drm_display_mode *adjusted_mode)
263 {
264 struct drm_device *dev = encoder->dev;
265 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
266 struct gma_crtc *gma_crtc = to_gma_crtc(encoder->crtc);
267 u32 pfit_control;
268
269 /*
270 * The LVDS pin pair will already have been turned on in the
271 * cdv_intel_crtc_mode_set since it has a large impact on the DPLL
272 * settings.
273 */
274
275 /*
276 * Enable automatic panel scaling so that non-native modes fill the
277 * screen. Should be enabled before the pipe is enabled, according to
278 * register description and PRM.
279 */
280 if (mode->hdisplay != adjusted_mode->hdisplay ||
281 mode->vdisplay != adjusted_mode->vdisplay)
282 pfit_control = (PFIT_ENABLE | VERT_AUTO_SCALE |
283 HORIZ_AUTO_SCALE | VERT_INTERP_BILINEAR |
284 HORIZ_INTERP_BILINEAR);
285 else
286 pfit_control = 0;
287
288 pfit_control |= gma_crtc->pipe << PFIT_PIPE_SHIFT;
289
290 if (dev_priv->lvds_dither)
291 pfit_control |= PANEL_8TO6_DITHER_ENABLE;
292
293 REG_WRITE(PFIT_CONTROL, pfit_control);
294 }
295
296 /*
297 * Return the list of DDC modes if available, or the BIOS fixed mode otherwise.
298 */
cdv_intel_lvds_get_modes(struct drm_connector * connector)299 static int cdv_intel_lvds_get_modes(struct drm_connector *connector)
300 {
301 struct drm_device *dev = connector->dev;
302 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
303 struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
304 int ret;
305
306 ret = psb_intel_ddc_get_modes(connector, connector->ddc);
307
308 if (ret)
309 return ret;
310
311 if (mode_dev->panel_fixed_mode != NULL) {
312 struct drm_display_mode *mode =
313 drm_mode_duplicate(dev, mode_dev->panel_fixed_mode);
314 if (!mode)
315 return 0;
316
317 drm_mode_probed_add(connector, mode);
318 return 1;
319 }
320
321 return 0;
322 }
323
cdv_intel_lvds_destroy(struct drm_connector * connector)324 static void cdv_intel_lvds_destroy(struct drm_connector *connector)
325 {
326 struct gma_connector *gma_connector = to_gma_connector(connector);
327 struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
328
329 gma_i2c_destroy(to_gma_i2c_chan(connector->ddc));
330 gma_i2c_destroy(gma_encoder->i2c_bus);
331 drm_connector_cleanup(connector);
332 kfree(gma_connector);
333 }
334
cdv_intel_lvds_set_property(struct drm_connector * connector,struct drm_property * property,uint64_t value)335 static int cdv_intel_lvds_set_property(struct drm_connector *connector,
336 struct drm_property *property,
337 uint64_t value)
338 {
339 struct drm_encoder *encoder = connector->encoder;
340
341 if (!strcmp(property->name, "scaling mode") && encoder) {
342 struct gma_crtc *crtc = to_gma_crtc(encoder->crtc);
343 uint64_t curValue;
344
345 if (!crtc)
346 return -1;
347
348 switch (value) {
349 case DRM_MODE_SCALE_FULLSCREEN:
350 break;
351 case DRM_MODE_SCALE_NO_SCALE:
352 break;
353 case DRM_MODE_SCALE_ASPECT:
354 break;
355 default:
356 return -1;
357 }
358
359 if (drm_object_property_get_value(&connector->base,
360 property,
361 &curValue))
362 return -1;
363
364 if (curValue == value)
365 return 0;
366
367 if (drm_object_property_set_value(&connector->base,
368 property,
369 value))
370 return -1;
371
372 if (crtc->saved_mode.hdisplay != 0 &&
373 crtc->saved_mode.vdisplay != 0) {
374 if (!drm_crtc_helper_set_mode(encoder->crtc,
375 &crtc->saved_mode,
376 encoder->crtc->x,
377 encoder->crtc->y,
378 encoder->crtc->primary->fb))
379 return -1;
380 }
381 } else if (!strcmp(property->name, "backlight") && encoder) {
382 if (drm_object_property_set_value(&connector->base,
383 property,
384 value))
385 return -1;
386 else
387 gma_backlight_set(encoder->dev, value);
388 } else if (!strcmp(property->name, "DPMS") && encoder) {
389 const struct drm_encoder_helper_funcs *helpers =
390 encoder->helper_private;
391 helpers->dpms(encoder, value);
392 }
393 return 0;
394 }
395
396 static const struct drm_encoder_helper_funcs
397 cdv_intel_lvds_helper_funcs = {
398 .dpms = cdv_intel_lvds_encoder_dpms,
399 .mode_fixup = cdv_intel_lvds_mode_fixup,
400 .prepare = cdv_intel_lvds_prepare,
401 .mode_set = cdv_intel_lvds_mode_set,
402 .commit = cdv_intel_lvds_commit,
403 };
404
405 static const struct drm_connector_helper_funcs
406 cdv_intel_lvds_connector_helper_funcs = {
407 .get_modes = cdv_intel_lvds_get_modes,
408 .mode_valid = cdv_intel_lvds_mode_valid,
409 .best_encoder = gma_best_encoder,
410 };
411
412 static const struct drm_connector_funcs cdv_intel_lvds_connector_funcs = {
413 .dpms = drm_helper_connector_dpms,
414 .fill_modes = drm_helper_probe_single_connector_modes,
415 .set_property = cdv_intel_lvds_set_property,
416 .destroy = cdv_intel_lvds_destroy,
417 };
418
419 /*
420 * Enumerate the child dev array parsed from VBT to check whether
421 * the LVDS is present.
422 * If it is present, return 1.
423 * If it is not present, return false.
424 * If no child dev is parsed from VBT, it assumes that the LVDS is present.
425 */
lvds_is_present_in_vbt(struct drm_device * dev,u8 * i2c_pin)426 static bool lvds_is_present_in_vbt(struct drm_device *dev,
427 u8 *i2c_pin)
428 {
429 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
430 int i;
431
432 if (!dev_priv->child_dev_num)
433 return true;
434
435 for (i = 0; i < dev_priv->child_dev_num; i++) {
436 struct child_device_config *child = dev_priv->child_dev + i;
437
438 /* If the device type is not LFP, continue.
439 * We have to check both the new identifiers as well as the
440 * old for compatibility with some BIOSes.
441 */
442 if (child->device_type != DEVICE_TYPE_INT_LFP &&
443 child->device_type != DEVICE_TYPE_LFP)
444 continue;
445
446 if (child->i2c_pin)
447 *i2c_pin = child->i2c_pin;
448
449 /* However, we cannot trust the BIOS writers to populate
450 * the VBT correctly. Since LVDS requires additional
451 * information from AIM blocks, a non-zero addin offset is
452 * a good indicator that the LVDS is actually present.
453 */
454 if (child->addin_offset)
455 return true;
456
457 /* But even then some BIOS writers perform some black magic
458 * and instantiate the device without reference to any
459 * additional data. Trust that if the VBT was written into
460 * the OpRegion then they have validated the LVDS's existence.
461 */
462 if (dev_priv->opregion.vbt)
463 return true;
464 }
465
466 return false;
467 }
468
469 /**
470 * cdv_intel_lvds_init - setup LVDS connectors on this device
471 * @dev: drm device
472 * @mode_dev: PSB mode device
473 *
474 * Create the connector, register the LVDS DDC bus, and try to figure out what
475 * modes we can display on the LVDS panel (if present).
476 */
cdv_intel_lvds_init(struct drm_device * dev,struct psb_intel_mode_device * mode_dev)477 void cdv_intel_lvds_init(struct drm_device *dev,
478 struct psb_intel_mode_device *mode_dev)
479 {
480 struct gma_encoder *gma_encoder;
481 struct gma_connector *gma_connector;
482 struct cdv_intel_lvds_priv *lvds_priv;
483 struct drm_connector *connector;
484 struct drm_encoder *encoder;
485 struct drm_display_mode *scan;
486 struct drm_crtc *crtc;
487 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
488 struct gma_i2c_chan *ddc_bus;
489 u32 lvds;
490 int pipe;
491 int ret;
492 u8 pin;
493
494 if (!dev_priv->lvds_enabled_in_vbt)
495 return;
496
497 pin = GMBUS_PORT_PANEL;
498 if (!lvds_is_present_in_vbt(dev, &pin)) {
499 DRM_DEBUG_KMS("LVDS is not present in VBT\n");
500 return;
501 }
502
503 gma_encoder = kzalloc(sizeof(struct gma_encoder),
504 GFP_KERNEL);
505 if (!gma_encoder)
506 return;
507
508 gma_connector = kzalloc(sizeof(struct gma_connector),
509 GFP_KERNEL);
510 if (!gma_connector)
511 goto err_free_encoder;
512
513 lvds_priv = kzalloc(sizeof(struct cdv_intel_lvds_priv), GFP_KERNEL);
514 if (!lvds_priv)
515 goto err_free_connector;
516
517 gma_encoder->dev_priv = lvds_priv;
518
519 connector = &gma_connector->base;
520 gma_connector->save = cdv_intel_lvds_save;
521 gma_connector->restore = cdv_intel_lvds_restore;
522 encoder = &gma_encoder->base;
523
524 /* Set up the DDC bus. */
525 ddc_bus = gma_i2c_create(dev, GPIOC, "LVDSDDC_C");
526 if (!ddc_bus) {
527 dev_printk(KERN_ERR, dev->dev,
528 "DDC bus registration " "failed.\n");
529 goto err_free_lvds_priv;
530 }
531
532 ret = drm_connector_init_with_ddc(dev, connector,
533 &cdv_intel_lvds_connector_funcs,
534 DRM_MODE_CONNECTOR_LVDS,
535 &ddc_bus->base);
536 if (ret)
537 goto err_destroy_ddc;
538
539 ret = drm_simple_encoder_init(dev, encoder, DRM_MODE_ENCODER_LVDS);
540 if (ret)
541 goto err_connector_cleanup;
542
543 gma_connector_attach_encoder(gma_connector, gma_encoder);
544 gma_encoder->type = INTEL_OUTPUT_LVDS;
545
546 drm_encoder_helper_add(encoder, &cdv_intel_lvds_helper_funcs);
547 drm_connector_helper_add(connector,
548 &cdv_intel_lvds_connector_helper_funcs);
549 connector->display_info.subpixel_order = SubPixelHorizontalRGB;
550 connector->interlace_allowed = false;
551 connector->doublescan_allowed = false;
552
553 /*Attach connector properties*/
554 drm_object_attach_property(&connector->base,
555 dev->mode_config.scaling_mode_property,
556 DRM_MODE_SCALE_FULLSCREEN);
557 drm_object_attach_property(&connector->base,
558 dev_priv->backlight_property,
559 BRIGHTNESS_MAX_LEVEL);
560
561 /**
562 * Set up I2C bus
563 * FIXME: distroy i2c_bus when exit
564 */
565 gma_encoder->i2c_bus = gma_i2c_create(dev, GPIOB, "LVDSBLC_B");
566 if (!gma_encoder->i2c_bus) {
567 dev_printk(KERN_ERR,
568 dev->dev, "I2C bus registration failed.\n");
569 goto err_encoder_cleanup;
570 }
571 gma_encoder->i2c_bus->slave_addr = 0x2C;
572 dev_priv->lvds_i2c_bus = gma_encoder->i2c_bus;
573
574 /*
575 * LVDS discovery:
576 * 1) check for EDID on DDC
577 * 2) check for VBT data
578 * 3) check to see if LVDS is already on
579 * if none of the above, no panel
580 * 4) make sure lid is open
581 * if closed, act like it's not there for now
582 */
583
584 /*
585 * Attempt to get the fixed panel mode from DDC. Assume that the
586 * preferred mode is the right one.
587 */
588 mutex_lock(&dev->mode_config.mutex);
589 psb_intel_ddc_get_modes(connector, &ddc_bus->base);
590
591 list_for_each_entry(scan, &connector->probed_modes, head) {
592 if (scan->type & DRM_MODE_TYPE_PREFERRED) {
593 mode_dev->panel_fixed_mode =
594 drm_mode_duplicate(dev, scan);
595 goto out; /* FIXME: check for quirks */
596 }
597 }
598
599 /* Failed to get EDID, what about VBT? do we need this?*/
600 if (dev_priv->lfp_lvds_vbt_mode) {
601 mode_dev->panel_fixed_mode =
602 drm_mode_duplicate(dev, dev_priv->lfp_lvds_vbt_mode);
603 if (mode_dev->panel_fixed_mode) {
604 mode_dev->panel_fixed_mode->type |=
605 DRM_MODE_TYPE_PREFERRED;
606 goto out; /* FIXME: check for quirks */
607 }
608 }
609 /*
610 * If we didn't get EDID, try checking if the panel is already turned
611 * on. If so, assume that whatever is currently programmed is the
612 * correct mode.
613 */
614 lvds = REG_READ(LVDS);
615 pipe = (lvds & LVDS_PIPEB_SELECT) ? 1 : 0;
616 crtc = psb_intel_get_crtc_from_pipe(dev, pipe);
617
618 if (crtc && (lvds & LVDS_PORT_EN)) {
619 mode_dev->panel_fixed_mode =
620 cdv_intel_crtc_mode_get(dev, crtc);
621 if (mode_dev->panel_fixed_mode) {
622 mode_dev->panel_fixed_mode->type |=
623 DRM_MODE_TYPE_PREFERRED;
624 goto out; /* FIXME: check for quirks */
625 }
626 }
627
628 /* If we still don't have a mode after all that, give up. */
629 if (!mode_dev->panel_fixed_mode) {
630 DRM_DEBUG
631 ("Found no modes on the lvds, ignoring the LVDS\n");
632 goto err_unlock;
633 }
634
635 /* setup PWM */
636 {
637 u32 pwm;
638
639 pwm = REG_READ(BLC_PWM_CTL2);
640 if (pipe == 1)
641 pwm |= PWM_PIPE_B;
642 else
643 pwm &= ~PWM_PIPE_B;
644 pwm |= PWM_ENABLE;
645 REG_WRITE(BLC_PWM_CTL2, pwm);
646 }
647
648 out:
649 mutex_unlock(&dev->mode_config.mutex);
650 return;
651
652 err_unlock:
653 mutex_unlock(&dev->mode_config.mutex);
654 gma_i2c_destroy(gma_encoder->i2c_bus);
655 err_encoder_cleanup:
656 drm_encoder_cleanup(encoder);
657 err_connector_cleanup:
658 drm_connector_cleanup(connector);
659 err_destroy_ddc:
660 gma_i2c_destroy(ddc_bus);
661 err_free_lvds_priv:
662 kfree(lvds_priv);
663 err_free_connector:
664 kfree(gma_connector);
665 err_free_encoder:
666 kfree(gma_encoder);
667 }
668