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 if (dev->props.fb_blank == FB_BLANK_UNBLANK &&
344 dev->props.power == FB_BLANK_UNBLANK)
345 level = dev->props.brightness;
346 else
347 level = 0;
348
349 if (ddata->has_bc)
350 acx565akm_set_brightness(ddata, level);
351 else
352 return -ENODEV;
353
354 return 0;
355 }
356
acx565akm_bl_get_intensity(struct backlight_device * dev)357 static int acx565akm_bl_get_intensity(struct backlight_device *dev)
358 {
359 struct panel_drv_data *ddata = dev_get_drvdata(&dev->dev);
360
361 dev_dbg(&dev->dev, "%s\n", __func__);
362
363 if (!ddata->has_bc)
364 return -ENODEV;
365
366 if (dev->props.fb_blank == FB_BLANK_UNBLANK &&
367 dev->props.power == FB_BLANK_UNBLANK) {
368 if (ddata->has_bc)
369 return acx565akm_get_actual_brightness(ddata);
370 else
371 return dev->props.brightness;
372 }
373
374 return 0;
375 }
376
acx565akm_bl_update_status_locked(struct backlight_device * dev)377 static int acx565akm_bl_update_status_locked(struct backlight_device *dev)
378 {
379 struct panel_drv_data *ddata = dev_get_drvdata(&dev->dev);
380 int r;
381
382 mutex_lock(&ddata->mutex);
383 r = acx565akm_bl_update_status(dev);
384 mutex_unlock(&ddata->mutex);
385
386 return r;
387 }
388
acx565akm_bl_get_intensity_locked(struct backlight_device * dev)389 static int acx565akm_bl_get_intensity_locked(struct backlight_device *dev)
390 {
391 struct panel_drv_data *ddata = dev_get_drvdata(&dev->dev);
392 int r;
393
394 mutex_lock(&ddata->mutex);
395 r = acx565akm_bl_get_intensity(dev);
396 mutex_unlock(&ddata->mutex);
397
398 return r;
399 }
400
401 static const struct backlight_ops acx565akm_bl_ops = {
402 .get_brightness = acx565akm_bl_get_intensity_locked,
403 .update_status = acx565akm_bl_update_status_locked,
404 };
405
406 /*--------------------Auto Brightness control via Sysfs---------------------*/
407
408 static const char * const cabc_modes[] = {
409 "off", /* always used when CABC is not supported */
410 "ui",
411 "still-image",
412 "moving-image",
413 };
414
show_cabc_mode(struct device * dev,struct device_attribute * attr,char * buf)415 static ssize_t show_cabc_mode(struct device *dev,
416 struct device_attribute *attr,
417 char *buf)
418 {
419 struct panel_drv_data *ddata = dev_get_drvdata(dev);
420 const char *mode_str;
421 int mode;
422 int len;
423
424 if (!ddata->has_cabc)
425 mode = 0;
426 else
427 mode = get_cabc_mode(ddata);
428 mode_str = "unknown";
429 if (mode >= 0 && mode < ARRAY_SIZE(cabc_modes))
430 mode_str = cabc_modes[mode];
431 len = snprintf(buf, PAGE_SIZE, "%s\n", mode_str);
432
433 return len < PAGE_SIZE - 1 ? len : PAGE_SIZE - 1;
434 }
435
store_cabc_mode(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)436 static ssize_t store_cabc_mode(struct device *dev,
437 struct device_attribute *attr,
438 const char *buf, size_t count)
439 {
440 struct panel_drv_data *ddata = dev_get_drvdata(dev);
441 int i;
442
443 for (i = 0; i < ARRAY_SIZE(cabc_modes); i++) {
444 const char *mode_str = cabc_modes[i];
445 int cmp_len = strlen(mode_str);
446
447 if (count > 0 && buf[count - 1] == '\n')
448 count--;
449 if (count != cmp_len)
450 continue;
451
452 if (strncmp(buf, mode_str, cmp_len) == 0)
453 break;
454 }
455
456 if (i == ARRAY_SIZE(cabc_modes))
457 return -EINVAL;
458
459 if (!ddata->has_cabc && i != 0)
460 return -EINVAL;
461
462 mutex_lock(&ddata->mutex);
463 set_cabc_mode(ddata, i);
464 mutex_unlock(&ddata->mutex);
465
466 return count;
467 }
468
show_cabc_available_modes(struct device * dev,struct device_attribute * attr,char * buf)469 static ssize_t show_cabc_available_modes(struct device *dev,
470 struct device_attribute *attr,
471 char *buf)
472 {
473 struct panel_drv_data *ddata = dev_get_drvdata(dev);
474 int len;
475 int i;
476
477 if (!ddata->has_cabc)
478 return sysfs_emit(buf, "%s\n", cabc_modes[0]);
479
480 for (i = 0, len = 0;
481 len < PAGE_SIZE && i < ARRAY_SIZE(cabc_modes); i++)
482 len += snprintf(&buf[len], PAGE_SIZE - len, "%s%s%s",
483 i ? " " : "", cabc_modes[i],
484 i == ARRAY_SIZE(cabc_modes) - 1 ? "\n" : "");
485
486 return len < PAGE_SIZE ? len : PAGE_SIZE - 1;
487 }
488
489 static DEVICE_ATTR(cabc_mode, S_IRUGO | S_IWUSR,
490 show_cabc_mode, store_cabc_mode);
491 static DEVICE_ATTR(cabc_available_modes, S_IRUGO,
492 show_cabc_available_modes, NULL);
493
494 static struct attribute *bldev_attrs[] = {
495 &dev_attr_cabc_mode.attr,
496 &dev_attr_cabc_available_modes.attr,
497 NULL,
498 };
499
500 static const struct attribute_group bldev_attr_group = {
501 .attrs = bldev_attrs,
502 };
503
acx565akm_connect(struct omap_dss_device * dssdev)504 static int acx565akm_connect(struct omap_dss_device *dssdev)
505 {
506 struct panel_drv_data *ddata = to_panel_data(dssdev);
507 struct omap_dss_device *in = ddata->in;
508
509 if (omapdss_device_is_connected(dssdev))
510 return 0;
511
512 return in->ops.sdi->connect(in, dssdev);
513 }
514
acx565akm_disconnect(struct omap_dss_device * dssdev)515 static void acx565akm_disconnect(struct omap_dss_device *dssdev)
516 {
517 struct panel_drv_data *ddata = to_panel_data(dssdev);
518 struct omap_dss_device *in = ddata->in;
519
520 if (!omapdss_device_is_connected(dssdev))
521 return;
522
523 in->ops.sdi->disconnect(in, dssdev);
524 }
525
acx565akm_panel_power_on(struct omap_dss_device * dssdev)526 static int acx565akm_panel_power_on(struct omap_dss_device *dssdev)
527 {
528 struct panel_drv_data *ddata = to_panel_data(dssdev);
529 struct omap_dss_device *in = ddata->in;
530 int r;
531
532 dev_dbg(&ddata->spi->dev, "%s\n", __func__);
533
534 in->ops.sdi->set_timings(in, &ddata->videomode);
535
536 if (ddata->datapairs > 0)
537 in->ops.sdi->set_datapairs(in, ddata->datapairs);
538
539 r = in->ops.sdi->enable(in);
540 if (r) {
541 pr_err("%s sdi enable failed\n", __func__);
542 return r;
543 }
544
545 /*FIXME tweak me */
546 msleep(50);
547
548 /*
549 * Note that we appear to activate the reset line here. However
550 * existing DTSes specified incorrect polarity for it (active high),
551 * so in fact this deasserts the reset line.
552 */
553 if (ddata->reset_gpio)
554 gpiod_set_value_cansleep(ddata->reset_gpio, 1);
555
556 if (ddata->enabled) {
557 dev_dbg(&ddata->spi->dev, "panel already enabled\n");
558 return 0;
559 }
560
561 /*
562 * We have to meet all the following delay requirements:
563 * 1. tRW: reset pulse width 10usec (7.12.1)
564 * 2. tRT: reset cancel time 5msec (7.12.1)
565 * 3. Providing PCLK,HS,VS signals for 2 frames = ~50msec worst
566 * case (7.6.2)
567 * 4. 120msec before the sleep out command (7.12.1)
568 */
569 msleep(120);
570
571 set_sleep_mode(ddata, 0);
572 ddata->enabled = 1;
573
574 /* 5msec between sleep out and the next command. (8.2.16) */
575 usleep_range(5000, 10000);
576 set_display_state(ddata, 1);
577 set_cabc_mode(ddata, ddata->cabc_mode);
578
579 return acx565akm_bl_update_status(ddata->bl_dev);
580 }
581
acx565akm_panel_power_off(struct omap_dss_device * dssdev)582 static void acx565akm_panel_power_off(struct omap_dss_device *dssdev)
583 {
584 struct panel_drv_data *ddata = to_panel_data(dssdev);
585 struct omap_dss_device *in = ddata->in;
586
587 dev_dbg(dssdev->dev, "%s\n", __func__);
588
589 if (!ddata->enabled)
590 return;
591
592 set_display_state(ddata, 0);
593 set_sleep_mode(ddata, 1);
594 ddata->enabled = 0;
595 /*
596 * We have to provide PCLK,HS,VS signals for 2 frames (worst case
597 * ~50msec) after sending the sleep in command and asserting the
598 * reset signal. We probably could assert the reset w/o the delay
599 * but we still delay to avoid possible artifacts. (7.6.1)
600 */
601 msleep(50);
602
603 /* see comment in acx565akm_panel_power_on() */
604 if (ddata->reset_gpio)
605 gpiod_set_value_cansleep(ddata->reset_gpio, 0);
606
607 /* FIXME need to tweak this delay */
608 msleep(100);
609
610 in->ops.sdi->disable(in);
611 }
612
acx565akm_enable(struct omap_dss_device * dssdev)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
acx565akm_disable(struct omap_dss_device * dssdev)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
acx565akm_set_timings(struct omap_dss_device * dssdev,struct omap_video_timings * timings)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
acx565akm_get_timings(struct omap_dss_device * dssdev,struct omap_video_timings * timings)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
acx565akm_check_timings(struct omap_dss_device * dssdev,struct omap_video_timings * timings)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
acx565akm_probe(struct spi_device * spi)696 static int acx565akm_probe(struct spi_device *spi)
697 {
698 struct panel_drv_data *ddata;
699 struct omap_dss_device *dssdev;
700 struct backlight_device *bldev;
701 int max_brightness, brightness;
702 struct backlight_properties props;
703 int r;
704
705 dev_dbg(&spi->dev, "%s\n", __func__);
706
707 if (!spi->dev.of_node)
708 return -ENODEV;
709
710 spi->mode = SPI_MODE_3;
711
712 ddata = devm_kzalloc(&spi->dev, sizeof(*ddata), GFP_KERNEL);
713 if (ddata == NULL)
714 return -ENOMEM;
715
716 dev_set_drvdata(&spi->dev, ddata);
717
718 ddata->spi = spi;
719
720 mutex_init(&ddata->mutex);
721
722 ddata->in = omapdss_of_find_source_for_first_ep(spi->dev.of_node);
723 r = PTR_ERR_OR_ZERO(ddata->in);
724 if (r) {
725 dev_err(&spi->dev, "failed to find video source\n");
726 return r;
727 }
728
729 ddata->reset_gpio = devm_gpiod_get_optional(&spi->dev, "reset",
730 GPIOD_OUT_LOW);
731 r = PTR_ERR_OR_ZERO(ddata->reset_gpio);
732 if (r)
733 goto err_gpio;
734
735 if (ddata->reset_gpio) {
736 gpiod_set_consumer_name(ddata->reset_gpio, "lcd reset");
737
738 /* release the reset line */
739 gpiod_set_value_cansleep(ddata->reset_gpio, 1);
740 }
741
742 /*
743 * After reset we have to wait 5 msec before the first
744 * command can be sent.
745 */
746 usleep_range(5000, 10000);
747
748 ddata->enabled = panel_enabled(ddata);
749
750 r = panel_detect(ddata);
751
752 if (!ddata->enabled && ddata->reset_gpio)
753 gpiod_set_value_cansleep(ddata->reset_gpio, 0);
754
755 if (r) {
756 dev_err(&spi->dev, "%s panel detect error\n", __func__);
757 goto err_detect;
758 }
759
760 memset(&props, 0, sizeof(props));
761 props.fb_blank = FB_BLANK_UNBLANK;
762 props.power = FB_BLANK_UNBLANK;
763 props.type = BACKLIGHT_RAW;
764
765 bldev = backlight_device_register("acx565akm", &ddata->spi->dev,
766 ddata, &acx565akm_bl_ops, &props);
767 if (IS_ERR(bldev)) {
768 r = PTR_ERR(bldev);
769 goto err_reg_bl;
770 }
771 ddata->bl_dev = bldev;
772 if (ddata->has_cabc) {
773 r = sysfs_create_group(&bldev->dev.kobj, &bldev_attr_group);
774 if (r) {
775 dev_err(&bldev->dev,
776 "%s failed to create sysfs files\n", __func__);
777 goto err_sysfs;
778 }
779 ddata->cabc_mode = get_hw_cabc_mode(ddata);
780 }
781
782 max_brightness = 255;
783
784 if (ddata->has_bc)
785 brightness = acx565akm_get_actual_brightness(ddata);
786 else
787 brightness = 0;
788
789 bldev->props.max_brightness = max_brightness;
790 bldev->props.brightness = brightness;
791
792 acx565akm_bl_update_status(bldev);
793
794
795 ddata->videomode = acx565akm_panel_timings;
796
797 dssdev = &ddata->dssdev;
798 dssdev->dev = &spi->dev;
799 dssdev->driver = &acx565akm_ops;
800 dssdev->type = OMAP_DISPLAY_TYPE_SDI;
801 dssdev->owner = THIS_MODULE;
802 dssdev->panel.timings = ddata->videomode;
803
804 r = omapdss_register_display(dssdev);
805 if (r) {
806 dev_err(&spi->dev, "Failed to register panel\n");
807 goto err_reg;
808 }
809
810 return 0;
811
812 err_reg:
813 sysfs_remove_group(&bldev->dev.kobj, &bldev_attr_group);
814 err_sysfs:
815 backlight_device_unregister(bldev);
816 err_reg_bl:
817 err_detect:
818 err_gpio:
819 omap_dss_put_device(ddata->in);
820 return r;
821 }
822
acx565akm_remove(struct spi_device * spi)823 static void acx565akm_remove(struct spi_device *spi)
824 {
825 struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
826 struct omap_dss_device *dssdev = &ddata->dssdev;
827 struct omap_dss_device *in = ddata->in;
828
829 dev_dbg(&ddata->spi->dev, "%s\n", __func__);
830
831 sysfs_remove_group(&ddata->bl_dev->dev.kobj, &bldev_attr_group);
832 backlight_device_unregister(ddata->bl_dev);
833
834 omapdss_unregister_display(dssdev);
835
836 acx565akm_disable(dssdev);
837 acx565akm_disconnect(dssdev);
838
839 omap_dss_put_device(in);
840 }
841
842 static const struct of_device_id acx565akm_of_match[] = {
843 { .compatible = "omapdss,sony,acx565akm", },
844 {},
845 };
846 MODULE_DEVICE_TABLE(of, acx565akm_of_match);
847
848 static struct spi_driver acx565akm_driver = {
849 .driver = {
850 .name = "acx565akm",
851 .of_match_table = acx565akm_of_match,
852 .suppress_bind_attrs = true,
853 },
854 .probe = acx565akm_probe,
855 .remove = acx565akm_remove,
856 };
857
858 module_spi_driver(acx565akm_driver);
859
860 MODULE_AUTHOR("Nokia Corporation");
861 MODULE_DESCRIPTION("acx565akm LCD Driver");
862 MODULE_LICENSE("GPL");
863