1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Sony ACX565AKM LCD Panel driver
4 *
5 * Copyright (C) 2010 Nokia Corporation
6 *
7 * Original Driver Author: Imre Deak <imre.deak@nokia.com>
8 * Based on panel-generic.c by Tomi Valkeinen <tomi.valkeinen@nokia.com>
9 * Adapted to new DSS2 framework: Roger Quadros <roger.quadros@nokia.com>
10 */
11
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/consumer.h>
22 #include <linux/of.h>
23
24 #include <video/omapfb_dss.h>
25
26 #define MIPID_CMD_READ_DISP_ID 0x04
27 #define MIPID_CMD_READ_RED 0x06
28 #define MIPID_CMD_READ_GREEN 0x07
29 #define MIPID_CMD_READ_BLUE 0x08
30 #define MIPID_CMD_READ_DISP_STATUS 0x09
31 #define MIPID_CMD_RDDSDR 0x0F
32 #define MIPID_CMD_SLEEP_IN 0x10
33 #define MIPID_CMD_SLEEP_OUT 0x11
34 #define MIPID_CMD_DISP_OFF 0x28
35 #define MIPID_CMD_DISP_ON 0x29
36 #define MIPID_CMD_WRITE_DISP_BRIGHTNESS 0x51
37 #define MIPID_CMD_READ_DISP_BRIGHTNESS 0x52
38 #define MIPID_CMD_WRITE_CTRL_DISP 0x53
39
40 #define CTRL_DISP_BRIGHTNESS_CTRL_ON (1 << 5)
41 #define CTRL_DISP_AMBIENT_LIGHT_CTRL_ON (1 << 4)
42 #define CTRL_DISP_BACKLIGHT_ON (1 << 2)
43 #define CTRL_DISP_AUTO_BRIGHTNESS_ON (1 << 1)
44
45 #define MIPID_CMD_READ_CTRL_DISP 0x54
46 #define MIPID_CMD_WRITE_CABC 0x55
47 #define MIPID_CMD_READ_CABC 0x56
48
49 #define MIPID_VER_LPH8923 3
50 #define MIPID_VER_LS041Y3 4
51 #define MIPID_VER_L4F00311 8
52 #define MIPID_VER_ACX565AKM 9
53
54 struct panel_drv_data {
55 struct omap_dss_device dssdev;
56 struct omap_dss_device *in;
57
58 struct gpio_desc *reset_gpio;
59
60 int datapairs;
61
62 struct omap_video_timings videomode;
63
64 char *name;
65 int enabled;
66 int model;
67 int revision;
68 u8 display_id[3];
69 unsigned has_bc:1;
70 unsigned has_cabc:1;
71 unsigned cabc_mode;
72 unsigned long hw_guard_end; /* next value of jiffies
73 when we can issue the
74 next sleep in/out command */
75 unsigned long hw_guard_wait; /* max guard time in jiffies */
76
77 struct spi_device *spi;
78 struct mutex mutex;
79
80 struct backlight_device *bl_dev;
81 };
82
83 static const struct omap_video_timings acx565akm_panel_timings = {
84 .x_res = 800,
85 .y_res = 480,
86 .pixelclock = 24000000,
87 .hfp = 28,
88 .hsw = 4,
89 .hbp = 24,
90 .vfp = 3,
91 .vsw = 3,
92 .vbp = 4,
93
94 .vsync_level = OMAPDSS_SIG_ACTIVE_LOW,
95 .hsync_level = OMAPDSS_SIG_ACTIVE_LOW,
96
97 .data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE,
98 .de_level = OMAPDSS_SIG_ACTIVE_HIGH,
99 .sync_pclk_edge = OMAPDSS_DRIVE_SIG_FALLING_EDGE,
100 };
101
102 #define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev)
103
acx565akm_transfer(struct panel_drv_data * ddata,int cmd,const u8 * wbuf,int wlen,u8 * rbuf,int rlen)104 static void acx565akm_transfer(struct panel_drv_data *ddata, int cmd,
105 const u8 *wbuf, int wlen, u8 *rbuf, int rlen)
106 {
107 struct spi_message m;
108 struct spi_transfer *x, xfer[5];
109 int r;
110
111 BUG_ON(ddata->spi == NULL);
112
113 spi_message_init(&m);
114
115 memset(xfer, 0, sizeof(xfer));
116 x = &xfer[0];
117
118 cmd &= 0xff;
119 x->tx_buf = &cmd;
120 x->bits_per_word = 9;
121 x->len = 2;
122
123 if (rlen > 1 && wlen == 0) {
124 /*
125 * Between the command and the response data there is a
126 * dummy clock cycle. Add an extra bit after the command
127 * word to account for this.
128 */
129 x->bits_per_word = 10;
130 cmd <<= 1;
131 }
132 spi_message_add_tail(x, &m);
133
134 if (wlen) {
135 x++;
136 x->tx_buf = wbuf;
137 x->len = wlen;
138 x->bits_per_word = 9;
139 spi_message_add_tail(x, &m);
140 }
141
142 if (rlen) {
143 x++;
144 x->rx_buf = rbuf;
145 x->len = rlen;
146 spi_message_add_tail(x, &m);
147 }
148
149 r = spi_sync(ddata->spi, &m);
150 if (r < 0)
151 dev_dbg(&ddata->spi->dev, "spi_sync %d\n", r);
152 }
153
acx565akm_cmd(struct panel_drv_data * ddata,int cmd)154 static inline void acx565akm_cmd(struct panel_drv_data *ddata, int cmd)
155 {
156 acx565akm_transfer(ddata, cmd, NULL, 0, NULL, 0);
157 }
158
acx565akm_write(struct panel_drv_data * ddata,int reg,const u8 * buf,int len)159 static inline void acx565akm_write(struct panel_drv_data *ddata,
160 int reg, const u8 *buf, int len)
161 {
162 acx565akm_transfer(ddata, reg, buf, len, NULL, 0);
163 }
164
acx565akm_read(struct panel_drv_data * ddata,int reg,u8 * buf,int len)165 static inline void acx565akm_read(struct panel_drv_data *ddata,
166 int reg, u8 *buf, int len)
167 {
168 acx565akm_transfer(ddata, reg, NULL, 0, buf, len);
169 }
170
hw_guard_start(struct panel_drv_data * ddata,int guard_msec)171 static void hw_guard_start(struct panel_drv_data *ddata, int guard_msec)
172 {
173 ddata->hw_guard_wait = msecs_to_jiffies(guard_msec);
174 ddata->hw_guard_end = jiffies + ddata->hw_guard_wait;
175 }
176
hw_guard_wait(struct panel_drv_data * ddata)177 static void hw_guard_wait(struct panel_drv_data *ddata)
178 {
179 unsigned long wait = ddata->hw_guard_end - jiffies;
180
181 if ((long)wait > 0 && wait <= ddata->hw_guard_wait) {
182 set_current_state(TASK_UNINTERRUPTIBLE);
183 schedule_timeout(wait);
184 }
185 }
186
set_sleep_mode(struct panel_drv_data * ddata,int on)187 static void set_sleep_mode(struct panel_drv_data *ddata, int on)
188 {
189 int cmd;
190
191 if (on)
192 cmd = MIPID_CMD_SLEEP_IN;
193 else
194 cmd = MIPID_CMD_SLEEP_OUT;
195 /*
196 * We have to keep 120msec between sleep in/out commands.
197 * (8.2.15, 8.2.16).
198 */
199 hw_guard_wait(ddata);
200 acx565akm_cmd(ddata, cmd);
201 hw_guard_start(ddata, 120);
202 }
203
set_display_state(struct panel_drv_data * ddata,int enabled)204 static void set_display_state(struct panel_drv_data *ddata, int enabled)
205 {
206 int cmd = enabled ? MIPID_CMD_DISP_ON : MIPID_CMD_DISP_OFF;
207
208 acx565akm_cmd(ddata, cmd);
209 }
210
panel_enabled(struct panel_drv_data * ddata)211 static int panel_enabled(struct panel_drv_data *ddata)
212 {
213 u32 disp_status;
214 int enabled;
215
216 acx565akm_read(ddata, MIPID_CMD_READ_DISP_STATUS,
217 (u8 *)&disp_status, 4);
218 disp_status = __be32_to_cpu(disp_status);
219 enabled = (disp_status & (1 << 17)) && (disp_status & (1 << 10));
220 dev_dbg(&ddata->spi->dev,
221 "LCD panel %senabled by bootloader (status 0x%04x)\n",
222 enabled ? "" : "not ", disp_status);
223 return enabled;
224 }
225
panel_detect(struct panel_drv_data * ddata)226 static int panel_detect(struct panel_drv_data *ddata)
227 {
228 acx565akm_read(ddata, MIPID_CMD_READ_DISP_ID, ddata->display_id, 3);
229 dev_dbg(&ddata->spi->dev, "MIPI display ID: %02x%02x%02x\n",
230 ddata->display_id[0],
231 ddata->display_id[1],
232 ddata->display_id[2]);
233
234 switch (ddata->display_id[0]) {
235 case 0x10:
236 ddata->model = MIPID_VER_ACX565AKM;
237 ddata->name = "acx565akm";
238 ddata->has_bc = 1;
239 ddata->has_cabc = 1;
240 break;
241 case 0x29:
242 ddata->model = MIPID_VER_L4F00311;
243 ddata->name = "l4f00311";
244 break;
245 case 0x45:
246 ddata->model = MIPID_VER_LPH8923;
247 ddata->name = "lph8923";
248 break;
249 case 0x83:
250 ddata->model = MIPID_VER_LS041Y3;
251 ddata->name = "ls041y3";
252 break;
253 default:
254 ddata->name = "unknown";
255 dev_err(&ddata->spi->dev, "invalid display ID\n");
256 return -ENODEV;
257 }
258
259 ddata->revision = ddata->display_id[1];
260
261 dev_info(&ddata->spi->dev, "omapfb: %s rev %02x LCD detected\n",
262 ddata->name, ddata->revision);
263
264 return 0;
265 }
266
267 /*----------------------Backlight Control-------------------------*/
268
enable_backlight_ctrl(struct panel_drv_data * ddata,int enable)269 static void enable_backlight_ctrl(struct panel_drv_data *ddata, int enable)
270 {
271 u16 ctrl;
272
273 acx565akm_read(ddata, MIPID_CMD_READ_CTRL_DISP, (u8 *)&ctrl, 1);
274 if (enable) {
275 ctrl |= CTRL_DISP_BRIGHTNESS_CTRL_ON |
276 CTRL_DISP_BACKLIGHT_ON;
277 } else {
278 ctrl &= ~(CTRL_DISP_BRIGHTNESS_CTRL_ON |
279 CTRL_DISP_BACKLIGHT_ON);
280 }
281
282 ctrl |= 1 << 8;
283 acx565akm_write(ddata, MIPID_CMD_WRITE_CTRL_DISP, (u8 *)&ctrl, 2);
284 }
285
set_cabc_mode(struct panel_drv_data * ddata,unsigned mode)286 static void set_cabc_mode(struct panel_drv_data *ddata, unsigned mode)
287 {
288 u16 cabc_ctrl;
289
290 ddata->cabc_mode = mode;
291 if (!ddata->enabled)
292 return;
293 cabc_ctrl = 0;
294 acx565akm_read(ddata, MIPID_CMD_READ_CABC, (u8 *)&cabc_ctrl, 1);
295 cabc_ctrl &= ~3;
296 cabc_ctrl |= (1 << 8) | (mode & 3);
297 acx565akm_write(ddata, MIPID_CMD_WRITE_CABC, (u8 *)&cabc_ctrl, 2);
298 }
299
get_cabc_mode(struct panel_drv_data * ddata)300 static unsigned get_cabc_mode(struct panel_drv_data *ddata)
301 {
302 return ddata->cabc_mode;
303 }
304
get_hw_cabc_mode(struct panel_drv_data * ddata)305 static unsigned get_hw_cabc_mode(struct panel_drv_data *ddata)
306 {
307 u8 cabc_ctrl;
308
309 acx565akm_read(ddata, MIPID_CMD_READ_CABC, &cabc_ctrl, 1);
310 return cabc_ctrl & 3;
311 }
312
acx565akm_set_brightness(struct panel_drv_data * ddata,int level)313 static void acx565akm_set_brightness(struct panel_drv_data *ddata, int level)
314 {
315 int bv;
316
317 bv = level | (1 << 8);
318 acx565akm_write(ddata, MIPID_CMD_WRITE_DISP_BRIGHTNESS, (u8 *)&bv, 2);
319
320 if (level)
321 enable_backlight_ctrl(ddata, 1);
322 else
323 enable_backlight_ctrl(ddata, 0);
324 }
325
acx565akm_get_actual_brightness(struct panel_drv_data * ddata)326 static int acx565akm_get_actual_brightness(struct panel_drv_data *ddata)
327 {
328 u8 bv;
329
330 acx565akm_read(ddata, MIPID_CMD_READ_DISP_BRIGHTNESS, &bv, 1);
331
332 return bv;
333 }
334
335
acx565akm_bl_update_status(struct backlight_device * dev)336 static int acx565akm_bl_update_status(struct backlight_device *dev)
337 {
338 struct panel_drv_data *ddata = dev_get_drvdata(&dev->dev);
339 int level;
340
341 dev_dbg(&ddata->spi->dev, "%s\n", __func__);
342
343 level = backlight_get_brightness(dev);
344
345 if (ddata->has_bc)
346 acx565akm_set_brightness(ddata, level);
347 else
348 return -ENODEV;
349
350 return 0;
351 }
352
acx565akm_bl_get_intensity(struct backlight_device * dev)353 static int acx565akm_bl_get_intensity(struct backlight_device *dev)
354 {
355 struct panel_drv_data *ddata = dev_get_drvdata(&dev->dev);
356
357 dev_dbg(&dev->dev, "%s\n", __func__);
358
359 if (!ddata->has_bc)
360 return -ENODEV;
361
362 if (!backlight_is_blank(dev)) {
363 if (ddata->has_bc)
364 return acx565akm_get_actual_brightness(ddata);
365 else
366 return dev->props.brightness;
367 }
368
369 return 0;
370 }
371
acx565akm_bl_update_status_locked(struct backlight_device * dev)372 static int acx565akm_bl_update_status_locked(struct backlight_device *dev)
373 {
374 struct panel_drv_data *ddata = dev_get_drvdata(&dev->dev);
375 int r;
376
377 mutex_lock(&ddata->mutex);
378 r = acx565akm_bl_update_status(dev);
379 mutex_unlock(&ddata->mutex);
380
381 return r;
382 }
383
acx565akm_bl_get_intensity_locked(struct backlight_device * dev)384 static int acx565akm_bl_get_intensity_locked(struct backlight_device *dev)
385 {
386 struct panel_drv_data *ddata = dev_get_drvdata(&dev->dev);
387 int r;
388
389 mutex_lock(&ddata->mutex);
390 r = acx565akm_bl_get_intensity(dev);
391 mutex_unlock(&ddata->mutex);
392
393 return r;
394 }
395
396 static const struct backlight_ops acx565akm_bl_ops = {
397 .get_brightness = acx565akm_bl_get_intensity_locked,
398 .update_status = acx565akm_bl_update_status_locked,
399 };
400
401 /*--------------------Auto Brightness control via Sysfs---------------------*/
402
403 static const char * const cabc_modes[] = {
404 "off", /* always used when CABC is not supported */
405 "ui",
406 "still-image",
407 "moving-image",
408 };
409
show_cabc_mode(struct device * dev,struct device_attribute * attr,char * buf)410 static ssize_t show_cabc_mode(struct device *dev,
411 struct device_attribute *attr,
412 char *buf)
413 {
414 struct panel_drv_data *ddata = dev_get_drvdata(dev);
415 const char *mode_str;
416 int mode;
417 int len;
418
419 if (!ddata->has_cabc)
420 mode = 0;
421 else
422 mode = get_cabc_mode(ddata);
423 mode_str = "unknown";
424 if (mode >= 0 && mode < ARRAY_SIZE(cabc_modes))
425 mode_str = cabc_modes[mode];
426 len = snprintf(buf, PAGE_SIZE, "%s\n", mode_str);
427
428 return len < PAGE_SIZE - 1 ? len : PAGE_SIZE - 1;
429 }
430
store_cabc_mode(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)431 static ssize_t store_cabc_mode(struct device *dev,
432 struct device_attribute *attr,
433 const char *buf, size_t count)
434 {
435 struct panel_drv_data *ddata = dev_get_drvdata(dev);
436 int i;
437
438 for (i = 0; i < ARRAY_SIZE(cabc_modes); i++) {
439 const char *mode_str = cabc_modes[i];
440 int cmp_len = strlen(mode_str);
441
442 if (count > 0 && buf[count - 1] == '\n')
443 count--;
444 if (count != cmp_len)
445 continue;
446
447 if (strncmp(buf, mode_str, cmp_len) == 0)
448 break;
449 }
450
451 if (i == ARRAY_SIZE(cabc_modes))
452 return -EINVAL;
453
454 if (!ddata->has_cabc && i != 0)
455 return -EINVAL;
456
457 mutex_lock(&ddata->mutex);
458 set_cabc_mode(ddata, i);
459 mutex_unlock(&ddata->mutex);
460
461 return count;
462 }
463
show_cabc_available_modes(struct device * dev,struct device_attribute * attr,char * buf)464 static ssize_t show_cabc_available_modes(struct device *dev,
465 struct device_attribute *attr,
466 char *buf)
467 {
468 struct panel_drv_data *ddata = dev_get_drvdata(dev);
469 int len = 0;
470 int i;
471
472 if (!ddata->has_cabc)
473 return sysfs_emit(buf, "%s\n", cabc_modes[0]);
474
475 for (i = 0; i < ARRAY_SIZE(cabc_modes); i++)
476 len += sysfs_emit_at(buf, len, "%s ", cabc_modes[i]);
477
478 /* Remove the trailing space */
479 if (len)
480 buf[len - 1] = '\n';
481
482 return len;
483 }
484
485 static DEVICE_ATTR(cabc_mode, S_IRUGO | S_IWUSR,
486 show_cabc_mode, store_cabc_mode);
487 static DEVICE_ATTR(cabc_available_modes, S_IRUGO,
488 show_cabc_available_modes, NULL);
489
490 static struct attribute *bldev_attrs[] = {
491 &dev_attr_cabc_mode.attr,
492 &dev_attr_cabc_available_modes.attr,
493 NULL,
494 };
495
496 static const struct attribute_group bldev_attr_group = {
497 .attrs = bldev_attrs,
498 };
499
acx565akm_connect(struct omap_dss_device * dssdev)500 static int acx565akm_connect(struct omap_dss_device *dssdev)
501 {
502 struct panel_drv_data *ddata = to_panel_data(dssdev);
503 struct omap_dss_device *in = ddata->in;
504
505 if (omapdss_device_is_connected(dssdev))
506 return 0;
507
508 return in->ops.sdi->connect(in, dssdev);
509 }
510
acx565akm_disconnect(struct omap_dss_device * dssdev)511 static void acx565akm_disconnect(struct omap_dss_device *dssdev)
512 {
513 struct panel_drv_data *ddata = to_panel_data(dssdev);
514 struct omap_dss_device *in = ddata->in;
515
516 if (!omapdss_device_is_connected(dssdev))
517 return;
518
519 in->ops.sdi->disconnect(in, dssdev);
520 }
521
acx565akm_panel_power_on(struct omap_dss_device * dssdev)522 static int acx565akm_panel_power_on(struct omap_dss_device *dssdev)
523 {
524 struct panel_drv_data *ddata = to_panel_data(dssdev);
525 struct omap_dss_device *in = ddata->in;
526 int r;
527
528 dev_dbg(&ddata->spi->dev, "%s\n", __func__);
529
530 in->ops.sdi->set_timings(in, &ddata->videomode);
531
532 if (ddata->datapairs > 0)
533 in->ops.sdi->set_datapairs(in, ddata->datapairs);
534
535 r = in->ops.sdi->enable(in);
536 if (r) {
537 pr_err("%s sdi enable failed\n", __func__);
538 return r;
539 }
540
541 /*FIXME tweak me */
542 msleep(50);
543
544 /*
545 * Note that we appear to activate the reset line here. However
546 * existing DTSes specified incorrect polarity for it (active high),
547 * so in fact this deasserts the reset line.
548 */
549 if (ddata->reset_gpio)
550 gpiod_set_value_cansleep(ddata->reset_gpio, 1);
551
552 if (ddata->enabled) {
553 dev_dbg(&ddata->spi->dev, "panel already enabled\n");
554 return 0;
555 }
556
557 /*
558 * We have to meet all the following delay requirements:
559 * 1. tRW: reset pulse width 10usec (7.12.1)
560 * 2. tRT: reset cancel time 5msec (7.12.1)
561 * 3. Providing PCLK,HS,VS signals for 2 frames = ~50msec worst
562 * case (7.6.2)
563 * 4. 120msec before the sleep out command (7.12.1)
564 */
565 msleep(120);
566
567 set_sleep_mode(ddata, 0);
568 ddata->enabled = 1;
569
570 /* 5msec between sleep out and the next command. (8.2.16) */
571 usleep_range(5000, 10000);
572 set_display_state(ddata, 1);
573 set_cabc_mode(ddata, ddata->cabc_mode);
574
575 return acx565akm_bl_update_status(ddata->bl_dev);
576 }
577
acx565akm_panel_power_off(struct omap_dss_device * dssdev)578 static void acx565akm_panel_power_off(struct omap_dss_device *dssdev)
579 {
580 struct panel_drv_data *ddata = to_panel_data(dssdev);
581 struct omap_dss_device *in = ddata->in;
582
583 dev_dbg(dssdev->dev, "%s\n", __func__);
584
585 if (!ddata->enabled)
586 return;
587
588 set_display_state(ddata, 0);
589 set_sleep_mode(ddata, 1);
590 ddata->enabled = 0;
591 /*
592 * We have to provide PCLK,HS,VS signals for 2 frames (worst case
593 * ~50msec) after sending the sleep in command and asserting the
594 * reset signal. We probably could assert the reset w/o the delay
595 * but we still delay to avoid possible artifacts. (7.6.1)
596 */
597 msleep(50);
598
599 /* see comment in acx565akm_panel_power_on() */
600 if (ddata->reset_gpio)
601 gpiod_set_value_cansleep(ddata->reset_gpio, 0);
602
603 /* FIXME need to tweak this delay */
604 msleep(100);
605
606 in->ops.sdi->disable(in);
607 }
608
acx565akm_enable(struct omap_dss_device * dssdev)609 static int acx565akm_enable(struct omap_dss_device *dssdev)
610 {
611 struct panel_drv_data *ddata = to_panel_data(dssdev);
612 int r;
613
614 dev_dbg(dssdev->dev, "%s\n", __func__);
615
616 if (!omapdss_device_is_connected(dssdev))
617 return -ENODEV;
618
619 if (omapdss_device_is_enabled(dssdev))
620 return 0;
621
622 mutex_lock(&ddata->mutex);
623 r = acx565akm_panel_power_on(dssdev);
624 mutex_unlock(&ddata->mutex);
625 if (r)
626 return r;
627
628 dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
629
630 return 0;
631 }
632
acx565akm_disable(struct omap_dss_device * dssdev)633 static void acx565akm_disable(struct omap_dss_device *dssdev)
634 {
635 struct panel_drv_data *ddata = to_panel_data(dssdev);
636
637 dev_dbg(dssdev->dev, "%s\n", __func__);
638
639 if (!omapdss_device_is_enabled(dssdev))
640 return;
641
642 mutex_lock(&ddata->mutex);
643 acx565akm_panel_power_off(dssdev);
644 mutex_unlock(&ddata->mutex);
645
646 dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
647 }
648
acx565akm_set_timings(struct omap_dss_device * dssdev,struct omap_video_timings * timings)649 static void acx565akm_set_timings(struct omap_dss_device *dssdev,
650 struct omap_video_timings *timings)
651 {
652 struct panel_drv_data *ddata = to_panel_data(dssdev);
653 struct omap_dss_device *in = ddata->in;
654
655 ddata->videomode = *timings;
656 dssdev->panel.timings = *timings;
657
658 in->ops.sdi->set_timings(in, timings);
659 }
660
acx565akm_get_timings(struct omap_dss_device * dssdev,struct omap_video_timings * timings)661 static void acx565akm_get_timings(struct omap_dss_device *dssdev,
662 struct omap_video_timings *timings)
663 {
664 struct panel_drv_data *ddata = to_panel_data(dssdev);
665
666 *timings = ddata->videomode;
667 }
668
acx565akm_check_timings(struct omap_dss_device * dssdev,struct omap_video_timings * timings)669 static int acx565akm_check_timings(struct omap_dss_device *dssdev,
670 struct omap_video_timings *timings)
671 {
672 struct panel_drv_data *ddata = to_panel_data(dssdev);
673 struct omap_dss_device *in = ddata->in;
674
675 return in->ops.sdi->check_timings(in, timings);
676 }
677
678 static struct omap_dss_driver acx565akm_ops = {
679 .connect = acx565akm_connect,
680 .disconnect = acx565akm_disconnect,
681
682 .enable = acx565akm_enable,
683 .disable = acx565akm_disable,
684
685 .set_timings = acx565akm_set_timings,
686 .get_timings = acx565akm_get_timings,
687 .check_timings = acx565akm_check_timings,
688
689 .get_resolution = omapdss_default_get_resolution,
690 };
691
acx565akm_probe(struct spi_device * spi)692 static int acx565akm_probe(struct spi_device *spi)
693 {
694 struct panel_drv_data *ddata;
695 struct omap_dss_device *dssdev;
696 struct backlight_device *bldev;
697 int max_brightness, brightness;
698 struct backlight_properties props;
699 int r;
700
701 dev_dbg(&spi->dev, "%s\n", __func__);
702
703 if (!spi->dev.of_node)
704 return -ENODEV;
705
706 spi->mode = SPI_MODE_3;
707
708 ddata = devm_kzalloc(&spi->dev, sizeof(*ddata), GFP_KERNEL);
709 if (ddata == NULL)
710 return -ENOMEM;
711
712 dev_set_drvdata(&spi->dev, ddata);
713
714 ddata->spi = spi;
715
716 mutex_init(&ddata->mutex);
717
718 ddata->in = omapdss_of_find_source_for_first_ep(spi->dev.of_node);
719 r = PTR_ERR_OR_ZERO(ddata->in);
720 if (r) {
721 dev_err(&spi->dev, "failed to find video source\n");
722 return r;
723 }
724
725 ddata->reset_gpio = devm_gpiod_get_optional(&spi->dev, "reset",
726 GPIOD_OUT_LOW);
727 r = PTR_ERR_OR_ZERO(ddata->reset_gpio);
728 if (r)
729 goto err_gpio;
730
731 if (ddata->reset_gpio) {
732 gpiod_set_consumer_name(ddata->reset_gpio, "lcd reset");
733
734 /* release the reset line */
735 gpiod_set_value_cansleep(ddata->reset_gpio, 1);
736 }
737
738 /*
739 * After reset we have to wait 5 msec before the first
740 * command can be sent.
741 */
742 usleep_range(5000, 10000);
743
744 ddata->enabled = panel_enabled(ddata);
745
746 r = panel_detect(ddata);
747
748 if (!ddata->enabled && ddata->reset_gpio)
749 gpiod_set_value_cansleep(ddata->reset_gpio, 0);
750
751 if (r) {
752 dev_err(&spi->dev, "%s panel detect error\n", __func__);
753 goto err_detect;
754 }
755
756 memset(&props, 0, sizeof(props));
757 props.power = BACKLIGHT_POWER_ON;
758 props.type = BACKLIGHT_RAW;
759
760 bldev = backlight_device_register("acx565akm", &ddata->spi->dev,
761 ddata, &acx565akm_bl_ops, &props);
762 if (IS_ERR(bldev)) {
763 r = PTR_ERR(bldev);
764 goto err_reg_bl;
765 }
766 ddata->bl_dev = bldev;
767 if (ddata->has_cabc) {
768 r = sysfs_create_group(&bldev->dev.kobj, &bldev_attr_group);
769 if (r) {
770 dev_err(&bldev->dev,
771 "%s failed to create sysfs files\n", __func__);
772 goto err_sysfs;
773 }
774 ddata->cabc_mode = get_hw_cabc_mode(ddata);
775 }
776
777 max_brightness = 255;
778
779 if (ddata->has_bc)
780 brightness = acx565akm_get_actual_brightness(ddata);
781 else
782 brightness = 0;
783
784 bldev->props.max_brightness = max_brightness;
785 bldev->props.brightness = brightness;
786
787 acx565akm_bl_update_status(bldev);
788
789
790 ddata->videomode = acx565akm_panel_timings;
791
792 dssdev = &ddata->dssdev;
793 dssdev->dev = &spi->dev;
794 dssdev->driver = &acx565akm_ops;
795 dssdev->type = OMAP_DISPLAY_TYPE_SDI;
796 dssdev->owner = THIS_MODULE;
797 dssdev->panel.timings = ddata->videomode;
798
799 r = omapdss_register_display(dssdev);
800 if (r) {
801 dev_err(&spi->dev, "Failed to register panel\n");
802 goto err_reg;
803 }
804
805 return 0;
806
807 err_reg:
808 sysfs_remove_group(&bldev->dev.kobj, &bldev_attr_group);
809 err_sysfs:
810 backlight_device_unregister(bldev);
811 err_reg_bl:
812 err_detect:
813 err_gpio:
814 omap_dss_put_device(ddata->in);
815 return r;
816 }
817
acx565akm_remove(struct spi_device * spi)818 static void acx565akm_remove(struct spi_device *spi)
819 {
820 struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
821 struct omap_dss_device *dssdev = &ddata->dssdev;
822 struct omap_dss_device *in = ddata->in;
823
824 dev_dbg(&ddata->spi->dev, "%s\n", __func__);
825
826 sysfs_remove_group(&ddata->bl_dev->dev.kobj, &bldev_attr_group);
827 backlight_device_unregister(ddata->bl_dev);
828
829 omapdss_unregister_display(dssdev);
830
831 acx565akm_disable(dssdev);
832 acx565akm_disconnect(dssdev);
833
834 omap_dss_put_device(in);
835 }
836
837 static const struct of_device_id acx565akm_of_match[] = {
838 { .compatible = "omapdss,sony,acx565akm", },
839 {},
840 };
841 MODULE_DEVICE_TABLE(of, acx565akm_of_match);
842
843 static struct spi_driver acx565akm_driver = {
844 .driver = {
845 .name = "acx565akm",
846 .of_match_table = acx565akm_of_match,
847 .suppress_bind_attrs = true,
848 },
849 .probe = acx565akm_probe,
850 .remove = acx565akm_remove,
851 };
852
853 module_spi_driver(acx565akm_driver);
854
855 MODULE_AUTHOR("Nokia Corporation");
856 MODULE_DESCRIPTION("acx565akm LCD Driver");
857 MODULE_LICENSE("GPL");
858