This source file includes following definitions.
- acx565akm_transfer
- acx565akm_cmd
- acx565akm_write
- acx565akm_read
- hw_guard_start
- hw_guard_wait
- set_sleep_mode
- set_display_state
- panel_enabled
- panel_detect
- enable_backlight_ctrl
- set_cabc_mode
- get_cabc_mode
- get_hw_cabc_mode
- acx565akm_set_brightness
- acx565akm_get_actual_brightness
- acx565akm_bl_update_status
- acx565akm_bl_get_intensity
- acx565akm_bl_update_status_locked
- acx565akm_bl_get_intensity_locked
- show_cabc_mode
- store_cabc_mode
- show_cabc_available_modes
- acx565akm_connect
- acx565akm_disconnect
- acx565akm_panel_power_on
- acx565akm_panel_power_off
- acx565akm_enable
- acx565akm_disable
- acx565akm_set_timings
- acx565akm_get_timings
- acx565akm_check_timings
- acx565akm_probe_pdata
- acx565akm_probe_of
- acx565akm_probe
- acx565akm_remove
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12 #include <linux/kernel.h>
13 #include <linux/module.h>
14 #include <linux/platform_device.h>
15 #include <linux/delay.h>
16 #include <linux/spi/spi.h>
17 #include <linux/jiffies.h>
18 #include <linux/sched.h>
19 #include <linux/backlight.h>
20 #include <linux/fb.h>
21 #include <linux/gpio.h>
22 #include <linux/of.h>
23 #include <linux/of_gpio.h>
24
25 #include <video/omapfb_dss.h>
26 #include <video/omap-panel-data.h>
27
28 #define MIPID_CMD_READ_DISP_ID 0x04
29 #define MIPID_CMD_READ_RED 0x06
30 #define MIPID_CMD_READ_GREEN 0x07
31 #define MIPID_CMD_READ_BLUE 0x08
32 #define MIPID_CMD_READ_DISP_STATUS 0x09
33 #define MIPID_CMD_RDDSDR 0x0F
34 #define MIPID_CMD_SLEEP_IN 0x10
35 #define MIPID_CMD_SLEEP_OUT 0x11
36 #define MIPID_CMD_DISP_OFF 0x28
37 #define MIPID_CMD_DISP_ON 0x29
38 #define MIPID_CMD_WRITE_DISP_BRIGHTNESS 0x51
39 #define MIPID_CMD_READ_DISP_BRIGHTNESS 0x52
40 #define MIPID_CMD_WRITE_CTRL_DISP 0x53
41
42 #define CTRL_DISP_BRIGHTNESS_CTRL_ON (1 << 5)
43 #define CTRL_DISP_AMBIENT_LIGHT_CTRL_ON (1 << 4)
44 #define CTRL_DISP_BACKLIGHT_ON (1 << 2)
45 #define CTRL_DISP_AUTO_BRIGHTNESS_ON (1 << 1)
46
47 #define MIPID_CMD_READ_CTRL_DISP 0x54
48 #define MIPID_CMD_WRITE_CABC 0x55
49 #define MIPID_CMD_READ_CABC 0x56
50
51 #define MIPID_VER_LPH8923 3
52 #define MIPID_VER_LS041Y3 4
53 #define MIPID_VER_L4F00311 8
54 #define MIPID_VER_ACX565AKM 9
55
56 struct panel_drv_data {
57 struct omap_dss_device dssdev;
58 struct omap_dss_device *in;
59
60 int reset_gpio;
61 int datapairs;
62
63 struct omap_video_timings videomode;
64
65 char *name;
66 int enabled;
67 int model;
68 int revision;
69 u8 display_id[3];
70 unsigned has_bc:1;
71 unsigned has_cabc:1;
72 unsigned cabc_mode;
73 unsigned long hw_guard_end;
74
75
76 unsigned long hw_guard_wait;
77
78 struct spi_device *spi;
79 struct mutex mutex;
80
81 struct backlight_device *bl_dev;
82 };
83
84 static const struct omap_video_timings acx565akm_panel_timings = {
85 .x_res = 800,
86 .y_res = 480,
87 .pixelclock = 24000000,
88 .hfp = 28,
89 .hsw = 4,
90 .hbp = 24,
91 .vfp = 3,
92 .vsw = 3,
93 .vbp = 4,
94
95 .vsync_level = OMAPDSS_SIG_ACTIVE_LOW,
96 .hsync_level = OMAPDSS_SIG_ACTIVE_LOW,
97
98 .data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE,
99 .de_level = OMAPDSS_SIG_ACTIVE_HIGH,
100 .sync_pclk_edge = OMAPDSS_DRIVE_SIG_FALLING_EDGE,
101 };
102
103 #define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev)
104
105 static void acx565akm_transfer(struct panel_drv_data *ddata, int cmd,
106 const u8 *wbuf, int wlen, u8 *rbuf, int rlen)
107 {
108 struct spi_message m;
109 struct spi_transfer *x, xfer[5];
110 int r;
111
112 BUG_ON(ddata->spi == NULL);
113
114 spi_message_init(&m);
115
116 memset(xfer, 0, sizeof(xfer));
117 x = &xfer[0];
118
119 cmd &= 0xff;
120 x->tx_buf = &cmd;
121 x->bits_per_word = 9;
122 x->len = 2;
123
124 if (rlen > 1 && wlen == 0) {
125
126
127
128
129
130 x->bits_per_word = 10;
131 cmd <<= 1;
132 }
133 spi_message_add_tail(x, &m);
134
135 if (wlen) {
136 x++;
137 x->tx_buf = wbuf;
138 x->len = wlen;
139 x->bits_per_word = 9;
140 spi_message_add_tail(x, &m);
141 }
142
143 if (rlen) {
144 x++;
145 x->rx_buf = rbuf;
146 x->len = rlen;
147 spi_message_add_tail(x, &m);
148 }
149
150 r = spi_sync(ddata->spi, &m);
151 if (r < 0)
152 dev_dbg(&ddata->spi->dev, "spi_sync %d\n", r);
153 }
154
155 static inline void acx565akm_cmd(struct panel_drv_data *ddata, int cmd)
156 {
157 acx565akm_transfer(ddata, cmd, NULL, 0, NULL, 0);
158 }
159
160 static inline void acx565akm_write(struct panel_drv_data *ddata,
161 int reg, const u8 *buf, int len)
162 {
163 acx565akm_transfer(ddata, reg, buf, len, NULL, 0);
164 }
165
166 static inline void acx565akm_read(struct panel_drv_data *ddata,
167 int reg, u8 *buf, int len)
168 {
169 acx565akm_transfer(ddata, reg, NULL, 0, buf, len);
170 }
171
172 static void hw_guard_start(struct panel_drv_data *ddata, int guard_msec)
173 {
174 ddata->hw_guard_wait = msecs_to_jiffies(guard_msec);
175 ddata->hw_guard_end = jiffies + ddata->hw_guard_wait;
176 }
177
178 static void hw_guard_wait(struct panel_drv_data *ddata)
179 {
180 unsigned long wait = ddata->hw_guard_end - jiffies;
181
182 if ((long)wait > 0 && wait <= ddata->hw_guard_wait) {
183 set_current_state(TASK_UNINTERRUPTIBLE);
184 schedule_timeout(wait);
185 }
186 }
187
188 static void set_sleep_mode(struct panel_drv_data *ddata, int on)
189 {
190 int cmd;
191
192 if (on)
193 cmd = MIPID_CMD_SLEEP_IN;
194 else
195 cmd = MIPID_CMD_SLEEP_OUT;
196
197
198
199
200 hw_guard_wait(ddata);
201 acx565akm_cmd(ddata, cmd);
202 hw_guard_start(ddata, 120);
203 }
204
205 static void set_display_state(struct panel_drv_data *ddata, int enabled)
206 {
207 int cmd = enabled ? MIPID_CMD_DISP_ON : MIPID_CMD_DISP_OFF;
208
209 acx565akm_cmd(ddata, cmd);
210 }
211
212 static int panel_enabled(struct panel_drv_data *ddata)
213 {
214 u32 disp_status;
215 int enabled;
216
217 acx565akm_read(ddata, MIPID_CMD_READ_DISP_STATUS,
218 (u8 *)&disp_status, 4);
219 disp_status = __be32_to_cpu(disp_status);
220 enabled = (disp_status & (1 << 17)) && (disp_status & (1 << 10));
221 dev_dbg(&ddata->spi->dev,
222 "LCD panel %senabled by bootloader (status 0x%04x)\n",
223 enabled ? "" : "not ", disp_status);
224 return enabled;
225 }
226
227 static int panel_detect(struct panel_drv_data *ddata)
228 {
229 acx565akm_read(ddata, MIPID_CMD_READ_DISP_ID, ddata->display_id, 3);
230 dev_dbg(&ddata->spi->dev, "MIPI display ID: %02x%02x%02x\n",
231 ddata->display_id[0],
232 ddata->display_id[1],
233 ddata->display_id[2]);
234
235 switch (ddata->display_id[0]) {
236 case 0x10:
237 ddata->model = MIPID_VER_ACX565AKM;
238 ddata->name = "acx565akm";
239 ddata->has_bc = 1;
240 ddata->has_cabc = 1;
241 break;
242 case 0x29:
243 ddata->model = MIPID_VER_L4F00311;
244 ddata->name = "l4f00311";
245 break;
246 case 0x45:
247 ddata->model = MIPID_VER_LPH8923;
248 ddata->name = "lph8923";
249 break;
250 case 0x83:
251 ddata->model = MIPID_VER_LS041Y3;
252 ddata->name = "ls041y3";
253 break;
254 default:
255 ddata->name = "unknown";
256 dev_err(&ddata->spi->dev, "invalid display ID\n");
257 return -ENODEV;
258 }
259
260 ddata->revision = ddata->display_id[1];
261
262 dev_info(&ddata->spi->dev, "omapfb: %s rev %02x LCD detected\n",
263 ddata->name, ddata->revision);
264
265 return 0;
266 }
267
268
269
270 static void enable_backlight_ctrl(struct panel_drv_data *ddata, int enable)
271 {
272 u16 ctrl;
273
274 acx565akm_read(ddata, MIPID_CMD_READ_CTRL_DISP, (u8 *)&ctrl, 1);
275 if (enable) {
276 ctrl |= CTRL_DISP_BRIGHTNESS_CTRL_ON |
277 CTRL_DISP_BACKLIGHT_ON;
278 } else {
279 ctrl &= ~(CTRL_DISP_BRIGHTNESS_CTRL_ON |
280 CTRL_DISP_BACKLIGHT_ON);
281 }
282
283 ctrl |= 1 << 8;
284 acx565akm_write(ddata, MIPID_CMD_WRITE_CTRL_DISP, (u8 *)&ctrl, 2);
285 }
286
287 static void set_cabc_mode(struct panel_drv_data *ddata, unsigned mode)
288 {
289 u16 cabc_ctrl;
290
291 ddata->cabc_mode = mode;
292 if (!ddata->enabled)
293 return;
294 cabc_ctrl = 0;
295 acx565akm_read(ddata, MIPID_CMD_READ_CABC, (u8 *)&cabc_ctrl, 1);
296 cabc_ctrl &= ~3;
297 cabc_ctrl |= (1 << 8) | (mode & 3);
298 acx565akm_write(ddata, MIPID_CMD_WRITE_CABC, (u8 *)&cabc_ctrl, 2);
299 }
300
301 static unsigned get_cabc_mode(struct panel_drv_data *ddata)
302 {
303 return ddata->cabc_mode;
304 }
305
306 static unsigned get_hw_cabc_mode(struct panel_drv_data *ddata)
307 {
308 u8 cabc_ctrl;
309
310 acx565akm_read(ddata, MIPID_CMD_READ_CABC, &cabc_ctrl, 1);
311 return cabc_ctrl & 3;
312 }
313
314 static void acx565akm_set_brightness(struct panel_drv_data *ddata, int level)
315 {
316 int bv;
317
318 bv = level | (1 << 8);
319 acx565akm_write(ddata, MIPID_CMD_WRITE_DISP_BRIGHTNESS, (u8 *)&bv, 2);
320
321 if (level)
322 enable_backlight_ctrl(ddata, 1);
323 else
324 enable_backlight_ctrl(ddata, 0);
325 }
326
327 static int acx565akm_get_actual_brightness(struct panel_drv_data *ddata)
328 {
329 u8 bv;
330
331 acx565akm_read(ddata, MIPID_CMD_READ_DISP_BRIGHTNESS, &bv, 1);
332
333 return bv;
334 }
335
336
337 static int acx565akm_bl_update_status(struct backlight_device *dev)
338 {
339 struct panel_drv_data *ddata = dev_get_drvdata(&dev->dev);
340 int level;
341
342 dev_dbg(&ddata->spi->dev, "%s\n", __func__);
343
344 if (dev->props.fb_blank == FB_BLANK_UNBLANK &&
345 dev->props.power == FB_BLANK_UNBLANK)
346 level = dev->props.brightness;
347 else
348 level = 0;
349
350 if (ddata->has_bc)
351 acx565akm_set_brightness(ddata, level);
352 else
353 return -ENODEV;
354
355 return 0;
356 }
357
358 static int acx565akm_bl_get_intensity(struct backlight_device *dev)
359 {
360 struct panel_drv_data *ddata = dev_get_drvdata(&dev->dev);
361
362 dev_dbg(&dev->dev, "%s\n", __func__);
363
364 if (!ddata->has_bc)
365 return -ENODEV;
366
367 if (dev->props.fb_blank == FB_BLANK_UNBLANK &&
368 dev->props.power == FB_BLANK_UNBLANK) {
369 if (ddata->has_bc)
370 return acx565akm_get_actual_brightness(ddata);
371 else
372 return dev->props.brightness;
373 }
374
375 return 0;
376 }
377
378 static int acx565akm_bl_update_status_locked(struct backlight_device *dev)
379 {
380 struct panel_drv_data *ddata = dev_get_drvdata(&dev->dev);
381 int r;
382
383 mutex_lock(&ddata->mutex);
384 r = acx565akm_bl_update_status(dev);
385 mutex_unlock(&ddata->mutex);
386
387 return r;
388 }
389
390 static int acx565akm_bl_get_intensity_locked(struct backlight_device *dev)
391 {
392 struct panel_drv_data *ddata = dev_get_drvdata(&dev->dev);
393 int r;
394
395 mutex_lock(&ddata->mutex);
396 r = acx565akm_bl_get_intensity(dev);
397 mutex_unlock(&ddata->mutex);
398
399 return r;
400 }
401
402 static const struct backlight_ops acx565akm_bl_ops = {
403 .get_brightness = acx565akm_bl_get_intensity_locked,
404 .update_status = acx565akm_bl_update_status_locked,
405 };
406
407
408
409 static const char * const cabc_modes[] = {
410 "off",
411 "ui",
412 "still-image",
413 "moving-image",
414 };
415
416 static ssize_t show_cabc_mode(struct device *dev,
417 struct device_attribute *attr,
418 char *buf)
419 {
420 struct panel_drv_data *ddata = dev_get_drvdata(dev);
421 const char *mode_str;
422 int mode;
423 int len;
424
425 if (!ddata->has_cabc)
426 mode = 0;
427 else
428 mode = get_cabc_mode(ddata);
429 mode_str = "unknown";
430 if (mode >= 0 && mode < ARRAY_SIZE(cabc_modes))
431 mode_str = cabc_modes[mode];
432 len = snprintf(buf, PAGE_SIZE, "%s\n", mode_str);
433
434 return len < PAGE_SIZE - 1 ? len : PAGE_SIZE - 1;
435 }
436
437 static ssize_t store_cabc_mode(struct device *dev,
438 struct device_attribute *attr,
439 const char *buf, size_t count)
440 {
441 struct panel_drv_data *ddata = dev_get_drvdata(dev);
442 int i;
443
444 for (i = 0; i < ARRAY_SIZE(cabc_modes); i++) {
445 const char *mode_str = cabc_modes[i];
446 int cmp_len = strlen(mode_str);
447
448 if (count > 0 && buf[count - 1] == '\n')
449 count--;
450 if (count != cmp_len)
451 continue;
452
453 if (strncmp(buf, mode_str, cmp_len) == 0)
454 break;
455 }
456
457 if (i == ARRAY_SIZE(cabc_modes))
458 return -EINVAL;
459
460 if (!ddata->has_cabc && i != 0)
461 return -EINVAL;
462
463 mutex_lock(&ddata->mutex);
464 set_cabc_mode(ddata, i);
465 mutex_unlock(&ddata->mutex);
466
467 return count;
468 }
469
470 static ssize_t show_cabc_available_modes(struct device *dev,
471 struct device_attribute *attr,
472 char *buf)
473 {
474 struct panel_drv_data *ddata = dev_get_drvdata(dev);
475 int len;
476 int i;
477
478 if (!ddata->has_cabc)
479 return snprintf(buf, PAGE_SIZE, "%s\n", cabc_modes[0]);
480
481 for (i = 0, len = 0;
482 len < PAGE_SIZE && i < ARRAY_SIZE(cabc_modes); i++)
483 len += snprintf(&buf[len], PAGE_SIZE - len, "%s%s%s",
484 i ? " " : "", cabc_modes[i],
485 i == ARRAY_SIZE(cabc_modes) - 1 ? "\n" : "");
486
487 return len < PAGE_SIZE ? len : PAGE_SIZE - 1;
488 }
489
490 static DEVICE_ATTR(cabc_mode, S_IRUGO | S_IWUSR,
491 show_cabc_mode, store_cabc_mode);
492 static DEVICE_ATTR(cabc_available_modes, S_IRUGO,
493 show_cabc_available_modes, NULL);
494
495 static struct attribute *bldev_attrs[] = {
496 &dev_attr_cabc_mode.attr,
497 &dev_attr_cabc_available_modes.attr,
498 NULL,
499 };
500
501 static const struct attribute_group bldev_attr_group = {
502 .attrs = bldev_attrs,
503 };
504
505 static int acx565akm_connect(struct omap_dss_device *dssdev)
506 {
507 struct panel_drv_data *ddata = to_panel_data(dssdev);
508 struct omap_dss_device *in = ddata->in;
509 int r;
510
511 if (omapdss_device_is_connected(dssdev))
512 return 0;
513
514 r = in->ops.sdi->connect(in, dssdev);
515 if (r)
516 return r;
517
518 return 0;
519 }
520
521 static void acx565akm_disconnect(struct omap_dss_device *dssdev)
522 {
523 struct panel_drv_data *ddata = to_panel_data(dssdev);
524 struct omap_dss_device *in = ddata->in;
525
526 if (!omapdss_device_is_connected(dssdev))
527 return;
528
529 in->ops.sdi->disconnect(in, dssdev);
530 }
531
532 static int acx565akm_panel_power_on(struct omap_dss_device *dssdev)
533 {
534 struct panel_drv_data *ddata = to_panel_data(dssdev);
535 struct omap_dss_device *in = ddata->in;
536 int r;
537
538 dev_dbg(&ddata->spi->dev, "%s\n", __func__);
539
540 in->ops.sdi->set_timings(in, &ddata->videomode);
541
542 if (ddata->datapairs > 0)
543 in->ops.sdi->set_datapairs(in, ddata->datapairs);
544
545 r = in->ops.sdi->enable(in);
546 if (r) {
547 pr_err("%s sdi enable failed\n", __func__);
548 return r;
549 }
550
551
552 msleep(50);
553
554 if (gpio_is_valid(ddata->reset_gpio))
555 gpio_set_value(ddata->reset_gpio, 1);
556
557 if (ddata->enabled) {
558 dev_dbg(&ddata->spi->dev, "panel already enabled\n");
559 return 0;
560 }
561
562
563
564
565
566
567
568
569
570 msleep(120);
571
572 set_sleep_mode(ddata, 0);
573 ddata->enabled = 1;
574
575
576 usleep_range(5000, 10000);
577 set_display_state(ddata, 1);
578 set_cabc_mode(ddata, ddata->cabc_mode);
579
580 return acx565akm_bl_update_status(ddata->bl_dev);
581 }
582
583 static void acx565akm_panel_power_off(struct omap_dss_device *dssdev)
584 {
585 struct panel_drv_data *ddata = to_panel_data(dssdev);
586 struct omap_dss_device *in = ddata->in;
587
588 dev_dbg(dssdev->dev, "%s\n", __func__);
589
590 if (!ddata->enabled)
591 return;
592
593 set_display_state(ddata, 0);
594 set_sleep_mode(ddata, 1);
595 ddata->enabled = 0;
596
597
598
599
600
601
602 msleep(50);
603
604 if (gpio_is_valid(ddata->reset_gpio))
605 gpio_set_value(ddata->reset_gpio, 0);
606
607
608 msleep(100);
609
610 in->ops.sdi->disable(in);
611 }
612
613 static int acx565akm_enable(struct omap_dss_device *dssdev)
614 {
615 struct panel_drv_data *ddata = to_panel_data(dssdev);
616 int r;
617
618 dev_dbg(dssdev->dev, "%s\n", __func__);
619
620 if (!omapdss_device_is_connected(dssdev))
621 return -ENODEV;
622
623 if (omapdss_device_is_enabled(dssdev))
624 return 0;
625
626 mutex_lock(&ddata->mutex);
627 r = acx565akm_panel_power_on(dssdev);
628 mutex_unlock(&ddata->mutex);
629 if (r)
630 return r;
631
632 dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
633
634 return 0;
635 }
636
637 static void acx565akm_disable(struct omap_dss_device *dssdev)
638 {
639 struct panel_drv_data *ddata = to_panel_data(dssdev);
640
641 dev_dbg(dssdev->dev, "%s\n", __func__);
642
643 if (!omapdss_device_is_enabled(dssdev))
644 return;
645
646 mutex_lock(&ddata->mutex);
647 acx565akm_panel_power_off(dssdev);
648 mutex_unlock(&ddata->mutex);
649
650 dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
651 }
652
653 static void acx565akm_set_timings(struct omap_dss_device *dssdev,
654 struct omap_video_timings *timings)
655 {
656 struct panel_drv_data *ddata = to_panel_data(dssdev);
657 struct omap_dss_device *in = ddata->in;
658
659 ddata->videomode = *timings;
660 dssdev->panel.timings = *timings;
661
662 in->ops.sdi->set_timings(in, timings);
663 }
664
665 static void acx565akm_get_timings(struct omap_dss_device *dssdev,
666 struct omap_video_timings *timings)
667 {
668 struct panel_drv_data *ddata = to_panel_data(dssdev);
669
670 *timings = ddata->videomode;
671 }
672
673 static int acx565akm_check_timings(struct omap_dss_device *dssdev,
674 struct omap_video_timings *timings)
675 {
676 struct panel_drv_data *ddata = to_panel_data(dssdev);
677 struct omap_dss_device *in = ddata->in;
678
679 return in->ops.sdi->check_timings(in, timings);
680 }
681
682 static struct omap_dss_driver acx565akm_ops = {
683 .connect = acx565akm_connect,
684 .disconnect = acx565akm_disconnect,
685
686 .enable = acx565akm_enable,
687 .disable = acx565akm_disable,
688
689 .set_timings = acx565akm_set_timings,
690 .get_timings = acx565akm_get_timings,
691 .check_timings = acx565akm_check_timings,
692
693 .get_resolution = omapdss_default_get_resolution,
694 };
695
696 static int acx565akm_probe_pdata(struct spi_device *spi)
697 {
698 const struct panel_acx565akm_platform_data *pdata;
699 struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
700 struct omap_dss_device *dssdev, *in;
701
702 pdata = dev_get_platdata(&spi->dev);
703
704 ddata->reset_gpio = pdata->reset_gpio;
705
706 in = omap_dss_find_output(pdata->source);
707 if (in == NULL) {
708 dev_err(&spi->dev, "failed to find video source '%s'\n",
709 pdata->source);
710 return -EPROBE_DEFER;
711 }
712 ddata->in = in;
713
714 ddata->datapairs = pdata->datapairs;
715
716 dssdev = &ddata->dssdev;
717 dssdev->name = pdata->name;
718
719 return 0;
720 }
721
722 static int acx565akm_probe_of(struct spi_device *spi)
723 {
724 struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
725 struct device_node *np = spi->dev.of_node;
726
727 ddata->reset_gpio = of_get_named_gpio(np, "reset-gpios", 0);
728
729 ddata->in = omapdss_of_find_source_for_first_ep(np);
730 if (IS_ERR(ddata->in)) {
731 dev_err(&spi->dev, "failed to find video source\n");
732 return PTR_ERR(ddata->in);
733 }
734
735 return 0;
736 }
737
738 static int acx565akm_probe(struct spi_device *spi)
739 {
740 struct panel_drv_data *ddata;
741 struct omap_dss_device *dssdev;
742 struct backlight_device *bldev;
743 int max_brightness, brightness;
744 struct backlight_properties props;
745 int r;
746
747 dev_dbg(&spi->dev, "%s\n", __func__);
748
749 spi->mode = SPI_MODE_3;
750
751 ddata = devm_kzalloc(&spi->dev, sizeof(*ddata), GFP_KERNEL);
752 if (ddata == NULL)
753 return -ENOMEM;
754
755 dev_set_drvdata(&spi->dev, ddata);
756
757 ddata->spi = spi;
758
759 mutex_init(&ddata->mutex);
760
761 if (dev_get_platdata(&spi->dev)) {
762 r = acx565akm_probe_pdata(spi);
763 if (r)
764 return r;
765 } else if (spi->dev.of_node) {
766 r = acx565akm_probe_of(spi);
767 if (r)
768 return r;
769 } else {
770 dev_err(&spi->dev, "platform data missing!\n");
771 return -ENODEV;
772 }
773
774 if (gpio_is_valid(ddata->reset_gpio)) {
775 r = devm_gpio_request_one(&spi->dev, ddata->reset_gpio,
776 GPIOF_OUT_INIT_LOW, "lcd reset");
777 if (r)
778 goto err_gpio;
779 }
780
781 if (gpio_is_valid(ddata->reset_gpio))
782 gpio_set_value(ddata->reset_gpio, 1);
783
784
785
786
787
788 usleep_range(5000, 10000);
789
790 ddata->enabled = panel_enabled(ddata);
791
792 r = panel_detect(ddata);
793
794 if (!ddata->enabled && gpio_is_valid(ddata->reset_gpio))
795 gpio_set_value(ddata->reset_gpio, 0);
796
797 if (r) {
798 dev_err(&spi->dev, "%s panel detect error\n", __func__);
799 goto err_detect;
800 }
801
802 memset(&props, 0, sizeof(props));
803 props.fb_blank = FB_BLANK_UNBLANK;
804 props.power = FB_BLANK_UNBLANK;
805 props.type = BACKLIGHT_RAW;
806
807 bldev = backlight_device_register("acx565akm", &ddata->spi->dev,
808 ddata, &acx565akm_bl_ops, &props);
809 if (IS_ERR(bldev)) {
810 r = PTR_ERR(bldev);
811 goto err_reg_bl;
812 }
813 ddata->bl_dev = bldev;
814 if (ddata->has_cabc) {
815 r = sysfs_create_group(&bldev->dev.kobj, &bldev_attr_group);
816 if (r) {
817 dev_err(&bldev->dev,
818 "%s failed to create sysfs files\n", __func__);
819 goto err_sysfs;
820 }
821 ddata->cabc_mode = get_hw_cabc_mode(ddata);
822 }
823
824 max_brightness = 255;
825
826 if (ddata->has_bc)
827 brightness = acx565akm_get_actual_brightness(ddata);
828 else
829 brightness = 0;
830
831 bldev->props.max_brightness = max_brightness;
832 bldev->props.brightness = brightness;
833
834 acx565akm_bl_update_status(bldev);
835
836
837 ddata->videomode = acx565akm_panel_timings;
838
839 dssdev = &ddata->dssdev;
840 dssdev->dev = &spi->dev;
841 dssdev->driver = &acx565akm_ops;
842 dssdev->type = OMAP_DISPLAY_TYPE_SDI;
843 dssdev->owner = THIS_MODULE;
844 dssdev->panel.timings = ddata->videomode;
845
846 r = omapdss_register_display(dssdev);
847 if (r) {
848 dev_err(&spi->dev, "Failed to register panel\n");
849 goto err_reg;
850 }
851
852 return 0;
853
854 err_reg:
855 sysfs_remove_group(&bldev->dev.kobj, &bldev_attr_group);
856 err_sysfs:
857 backlight_device_unregister(bldev);
858 err_reg_bl:
859 err_detect:
860 err_gpio:
861 omap_dss_put_device(ddata->in);
862 return r;
863 }
864
865 static int acx565akm_remove(struct spi_device *spi)
866 {
867 struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
868 struct omap_dss_device *dssdev = &ddata->dssdev;
869 struct omap_dss_device *in = ddata->in;
870
871 dev_dbg(&ddata->spi->dev, "%s\n", __func__);
872
873 sysfs_remove_group(&ddata->bl_dev->dev.kobj, &bldev_attr_group);
874 backlight_device_unregister(ddata->bl_dev);
875
876 omapdss_unregister_display(dssdev);
877
878 acx565akm_disable(dssdev);
879 acx565akm_disconnect(dssdev);
880
881 omap_dss_put_device(in);
882
883 return 0;
884 }
885
886 static const struct of_device_id acx565akm_of_match[] = {
887 { .compatible = "omapdss,sony,acx565akm", },
888 {},
889 };
890 MODULE_DEVICE_TABLE(of, acx565akm_of_match);
891
892 static struct spi_driver acx565akm_driver = {
893 .driver = {
894 .name = "acx565akm",
895 .of_match_table = acx565akm_of_match,
896 .suppress_bind_attrs = true,
897 },
898 .probe = acx565akm_probe,
899 .remove = acx565akm_remove,
900 };
901
902 module_spi_driver(acx565akm_driver);
903
904 MODULE_AUTHOR("Nokia Corporation");
905 MODULE_DESCRIPTION("acx565akm LCD Driver");
906 MODULE_LICENSE("GPL");