Commit | Line | Data |
---|---|---|
1c8fc3f0 LP |
1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* | |
3 | * Sony ACX565AKM LCD Panel driver | |
4 | * | |
5 | * Copyright (C) 2019 Texas Instruments Incorporated | |
6 | * | |
7 | * Based on the omapdrm-specific panel-sony-acx565akm driver | |
8 | * | |
9 | * Copyright (C) 2010 Nokia Corporation | |
10 | * Author: Imre Deak <imre.deak@nokia.com> | |
11 | */ | |
12 | ||
13 | /* | |
14 | * TODO (to be addressed with hardware access to test the changes): | |
15 | * | |
16 | * - Update backlight support to use backlight_update_status() etc. | |
17 | * - Use prepare/unprepare for the basic power on/off of the backligt | |
18 | */ | |
19 | ||
20 | #include <linux/backlight.h> | |
21 | #include <linux/delay.h> | |
22 | #include <linux/gpio/consumer.h> | |
23 | #include <linux/jiffies.h> | |
24 | #include <linux/module.h> | |
25 | #include <linux/mutex.h> | |
26 | #include <linux/sched.h> | |
27 | #include <linux/spi/spi.h> | |
28 | #include <video/mipi_display.h> | |
29 | ||
30 | #include <drm/drm_connector.h> | |
31 | #include <drm/drm_modes.h> | |
32 | #include <drm/drm_panel.h> | |
33 | ||
415b8dd0 LP |
34 | #define CTRL_DISP_BRIGHTNESS_CTRL_ON BIT(5) |
35 | #define CTRL_DISP_AMBIENT_LIGHT_CTRL_ON BIT(4) | |
36 | #define CTRL_DISP_BACKLIGHT_ON BIT(2) | |
37 | #define CTRL_DISP_AUTO_BRIGHTNESS_ON BIT(1) | |
1c8fc3f0 LP |
38 | |
39 | #define MIPID_CMD_WRITE_CABC 0x55 | |
40 | #define MIPID_CMD_READ_CABC 0x56 | |
41 | ||
42 | #define MIPID_VER_LPH8923 3 | |
43 | #define MIPID_VER_LS041Y3 4 | |
44 | #define MIPID_VER_L4F00311 8 | |
45 | #define MIPID_VER_ACX565AKM 9 | |
46 | ||
47 | struct acx565akm_panel { | |
48 | struct drm_panel panel; | |
49 | ||
50 | struct spi_device *spi; | |
51 | struct gpio_desc *reset_gpio; | |
52 | struct backlight_device *backlight; | |
53 | ||
54 | struct mutex mutex; | |
55 | ||
56 | const char *name; | |
57 | u8 display_id[3]; | |
58 | int model; | |
59 | int revision; | |
60 | bool has_bc; | |
61 | bool has_cabc; | |
62 | ||
63 | bool enabled; | |
64 | unsigned int cabc_mode; | |
65 | /* | |
66 | * Next value of jiffies when we can issue the next sleep in/out | |
67 | * command. | |
68 | */ | |
69 | unsigned long hw_guard_end; | |
70 | unsigned long hw_guard_wait; /* max guard time in jiffies */ | |
71 | }; | |
72 | ||
73 | #define to_acx565akm_device(p) container_of(p, struct acx565akm_panel, panel) | |
74 | ||
75 | static void acx565akm_transfer(struct acx565akm_panel *lcd, int cmd, | |
76 | const u8 *wbuf, int wlen, u8 *rbuf, int rlen) | |
77 | { | |
78 | struct spi_message m; | |
79 | struct spi_transfer *x, xfer[5]; | |
80 | int ret; | |
81 | ||
82 | spi_message_init(&m); | |
83 | ||
84 | memset(xfer, 0, sizeof(xfer)); | |
85 | x = &xfer[0]; | |
86 | ||
87 | cmd &= 0xff; | |
88 | x->tx_buf = &cmd; | |
89 | x->bits_per_word = 9; | |
90 | x->len = 2; | |
91 | ||
92 | if (rlen > 1 && wlen == 0) { | |
93 | /* | |
94 | * Between the command and the response data there is a | |
95 | * dummy clock cycle. Add an extra bit after the command | |
96 | * word to account for this. | |
97 | */ | |
98 | x->bits_per_word = 10; | |
99 | cmd <<= 1; | |
100 | } | |
101 | spi_message_add_tail(x, &m); | |
102 | ||
103 | if (wlen) { | |
104 | x++; | |
105 | x->tx_buf = wbuf; | |
106 | x->len = wlen; | |
107 | x->bits_per_word = 9; | |
108 | spi_message_add_tail(x, &m); | |
109 | } | |
110 | ||
111 | if (rlen) { | |
112 | x++; | |
113 | x->rx_buf = rbuf; | |
114 | x->len = rlen; | |
115 | spi_message_add_tail(x, &m); | |
116 | } | |
117 | ||
118 | ret = spi_sync(lcd->spi, &m); | |
119 | if (ret < 0) | |
120 | dev_dbg(&lcd->spi->dev, "spi_sync %d\n", ret); | |
121 | } | |
122 | ||
123 | static inline void acx565akm_cmd(struct acx565akm_panel *lcd, int cmd) | |
124 | { | |
125 | acx565akm_transfer(lcd, cmd, NULL, 0, NULL, 0); | |
126 | } | |
127 | ||
128 | static inline void acx565akm_write(struct acx565akm_panel *lcd, | |
129 | int reg, const u8 *buf, int len) | |
130 | { | |
131 | acx565akm_transfer(lcd, reg, buf, len, NULL, 0); | |
132 | } | |
133 | ||
134 | static inline void acx565akm_read(struct acx565akm_panel *lcd, | |
135 | int reg, u8 *buf, int len) | |
136 | { | |
137 | acx565akm_transfer(lcd, reg, NULL, 0, buf, len); | |
138 | } | |
139 | ||
140 | /* ----------------------------------------------------------------------------- | |
141 | * Auto Brightness Control Via sysfs | |
142 | */ | |
143 | ||
144 | static unsigned int acx565akm_get_cabc_mode(struct acx565akm_panel *lcd) | |
145 | { | |
146 | return lcd->cabc_mode; | |
147 | } | |
148 | ||
149 | static void acx565akm_set_cabc_mode(struct acx565akm_panel *lcd, | |
150 | unsigned int mode) | |
151 | { | |
152 | u16 cabc_ctrl; | |
153 | ||
154 | lcd->cabc_mode = mode; | |
155 | if (!lcd->enabled) | |
156 | return; | |
157 | cabc_ctrl = 0; | |
158 | acx565akm_read(lcd, MIPID_CMD_READ_CABC, (u8 *)&cabc_ctrl, 1); | |
159 | cabc_ctrl &= ~3; | |
160 | cabc_ctrl |= (1 << 8) | (mode & 3); | |
161 | acx565akm_write(lcd, MIPID_CMD_WRITE_CABC, (u8 *)&cabc_ctrl, 2); | |
162 | } | |
163 | ||
164 | static unsigned int acx565akm_get_hw_cabc_mode(struct acx565akm_panel *lcd) | |
165 | { | |
166 | u8 cabc_ctrl; | |
167 | ||
168 | acx565akm_read(lcd, MIPID_CMD_READ_CABC, &cabc_ctrl, 1); | |
169 | return cabc_ctrl & 3; | |
170 | } | |
171 | ||
172 | static const char * const acx565akm_cabc_modes[] = { | |
173 | "off", /* always used when CABC is not supported */ | |
174 | "ui", | |
175 | "still-image", | |
176 | "moving-image", | |
177 | }; | |
178 | ||
179 | static ssize_t cabc_mode_show(struct device *dev, | |
180 | struct device_attribute *attr, | |
181 | char *buf) | |
182 | { | |
183 | struct acx565akm_panel *lcd = dev_get_drvdata(dev); | |
184 | const char *mode_str; | |
185 | int mode; | |
186 | ||
187 | if (!lcd->has_cabc) | |
188 | mode = 0; | |
189 | else | |
190 | mode = acx565akm_get_cabc_mode(lcd); | |
191 | ||
192 | mode_str = "unknown"; | |
193 | if (mode >= 0 && mode < ARRAY_SIZE(acx565akm_cabc_modes)) | |
194 | mode_str = acx565akm_cabc_modes[mode]; | |
195 | ||
196 | return sprintf(buf, "%s\n", mode_str); | |
197 | } | |
198 | ||
199 | static ssize_t cabc_mode_store(struct device *dev, | |
200 | struct device_attribute *attr, | |
201 | const char *buf, size_t count) | |
202 | { | |
203 | struct acx565akm_panel *lcd = dev_get_drvdata(dev); | |
204 | unsigned int i; | |
205 | ||
206 | for (i = 0; i < ARRAY_SIZE(acx565akm_cabc_modes); i++) { | |
207 | const char *mode_str = acx565akm_cabc_modes[i]; | |
208 | int cmp_len = strlen(mode_str); | |
209 | ||
210 | if (count > 0 && buf[count - 1] == '\n') | |
211 | count--; | |
212 | if (count != cmp_len) | |
213 | continue; | |
214 | ||
215 | if (strncmp(buf, mode_str, cmp_len) == 0) | |
216 | break; | |
217 | } | |
218 | ||
219 | if (i == ARRAY_SIZE(acx565akm_cabc_modes)) | |
220 | return -EINVAL; | |
221 | ||
222 | if (!lcd->has_cabc && i != 0) | |
223 | return -EINVAL; | |
224 | ||
225 | mutex_lock(&lcd->mutex); | |
226 | acx565akm_set_cabc_mode(lcd, i); | |
227 | mutex_unlock(&lcd->mutex); | |
228 | ||
229 | return count; | |
230 | } | |
231 | ||
232 | static ssize_t cabc_available_modes_show(struct device *dev, | |
233 | struct device_attribute *attr, | |
234 | char *buf) | |
235 | { | |
236 | struct acx565akm_panel *lcd = dev_get_drvdata(dev); | |
237 | unsigned int i; | |
238 | size_t len = 0; | |
239 | ||
240 | if (!lcd->has_cabc) | |
241 | return sprintf(buf, "%s\n", acx565akm_cabc_modes[0]); | |
242 | ||
243 | for (i = 0; i < ARRAY_SIZE(acx565akm_cabc_modes); i++) | |
244 | len += sprintf(&buf[len], "%s%s", i ? " " : "", | |
245 | acx565akm_cabc_modes[i]); | |
246 | ||
247 | buf[len++] = '\n'; | |
248 | ||
249 | return len; | |
250 | } | |
251 | ||
252 | static DEVICE_ATTR_RW(cabc_mode); | |
253 | static DEVICE_ATTR_RO(cabc_available_modes); | |
254 | ||
255 | static struct attribute *acx565akm_cabc_attrs[] = { | |
256 | &dev_attr_cabc_mode.attr, | |
257 | &dev_attr_cabc_available_modes.attr, | |
258 | NULL, | |
259 | }; | |
260 | ||
261 | static const struct attribute_group acx565akm_cabc_attr_group = { | |
262 | .attrs = acx565akm_cabc_attrs, | |
263 | }; | |
264 | ||
265 | /* ----------------------------------------------------------------------------- | |
266 | * Backlight Device | |
267 | */ | |
268 | ||
269 | static int acx565akm_get_actual_brightness(struct acx565akm_panel *lcd) | |
270 | { | |
271 | u8 bv; | |
272 | ||
273 | acx565akm_read(lcd, MIPI_DCS_GET_DISPLAY_BRIGHTNESS, &bv, 1); | |
274 | ||
275 | return bv; | |
276 | } | |
277 | ||
278 | static void acx565akm_set_brightness(struct acx565akm_panel *lcd, int level) | |
279 | { | |
280 | u16 ctrl; | |
281 | int bv; | |
282 | ||
283 | bv = level | (1 << 8); | |
284 | acx565akm_write(lcd, MIPI_DCS_SET_DISPLAY_BRIGHTNESS, (u8 *)&bv, 2); | |
285 | ||
286 | acx565akm_read(lcd, MIPI_DCS_GET_CONTROL_DISPLAY, (u8 *)&ctrl, 1); | |
287 | if (level) | |
288 | ctrl |= CTRL_DISP_BRIGHTNESS_CTRL_ON | | |
289 | CTRL_DISP_BACKLIGHT_ON; | |
290 | else | |
291 | ctrl &= ~(CTRL_DISP_BRIGHTNESS_CTRL_ON | | |
292 | CTRL_DISP_BACKLIGHT_ON); | |
293 | ||
294 | ctrl |= 1 << 8; | |
295 | acx565akm_write(lcd, MIPI_DCS_WRITE_CONTROL_DISPLAY, (u8 *)&ctrl, 2); | |
296 | } | |
297 | ||
298 | static int acx565akm_bl_update_status_locked(struct backlight_device *dev) | |
299 | { | |
300 | struct acx565akm_panel *lcd = dev_get_drvdata(&dev->dev); | |
c974f755 | 301 | int level = backlight_get_brightness(dev); |
1c8fc3f0 LP |
302 | |
303 | acx565akm_set_brightness(lcd, level); | |
304 | ||
305 | return 0; | |
306 | } | |
307 | ||
308 | static int acx565akm_bl_update_status(struct backlight_device *dev) | |
309 | { | |
310 | struct acx565akm_panel *lcd = dev_get_drvdata(&dev->dev); | |
311 | int ret; | |
312 | ||
313 | mutex_lock(&lcd->mutex); | |
314 | ret = acx565akm_bl_update_status_locked(dev); | |
315 | mutex_unlock(&lcd->mutex); | |
316 | ||
317 | return ret; | |
318 | } | |
319 | ||
320 | static int acx565akm_bl_get_intensity(struct backlight_device *dev) | |
321 | { | |
322 | struct acx565akm_panel *lcd = dev_get_drvdata(&dev->dev); | |
323 | unsigned int intensity; | |
324 | ||
325 | mutex_lock(&lcd->mutex); | |
326 | ||
c974f755 | 327 | if (!backlight_is_blank(dev)) |
1c8fc3f0 LP |
328 | intensity = acx565akm_get_actual_brightness(lcd); |
329 | else | |
330 | intensity = 0; | |
331 | ||
332 | mutex_unlock(&lcd->mutex); | |
333 | ||
334 | return intensity; | |
335 | } | |
336 | ||
337 | static const struct backlight_ops acx565akm_bl_ops = { | |
338 | .get_brightness = acx565akm_bl_get_intensity, | |
339 | .update_status = acx565akm_bl_update_status, | |
340 | }; | |
341 | ||
342 | static int acx565akm_backlight_init(struct acx565akm_panel *lcd) | |
343 | { | |
344 | struct backlight_properties props = { | |
649ae0e0 | 345 | .power = BACKLIGHT_POWER_ON, |
1c8fc3f0 LP |
346 | .type = BACKLIGHT_RAW, |
347 | }; | |
348 | int ret; | |
349 | ||
350 | lcd->backlight = backlight_device_register(lcd->name, &lcd->spi->dev, | |
351 | lcd, &acx565akm_bl_ops, | |
352 | &props); | |
353 | if (IS_ERR(lcd->backlight)) { | |
354 | ret = PTR_ERR(lcd->backlight); | |
355 | lcd->backlight = NULL; | |
356 | return ret; | |
357 | } | |
358 | ||
359 | if (lcd->has_cabc) { | |
360 | ret = sysfs_create_group(&lcd->backlight->dev.kobj, | |
361 | &acx565akm_cabc_attr_group); | |
362 | if (ret < 0) { | |
363 | dev_err(&lcd->spi->dev, | |
364 | "%s failed to create sysfs files\n", __func__); | |
365 | backlight_device_unregister(lcd->backlight); | |
366 | return ret; | |
367 | } | |
368 | ||
369 | lcd->cabc_mode = acx565akm_get_hw_cabc_mode(lcd); | |
370 | } | |
371 | ||
372 | lcd->backlight->props.max_brightness = 255; | |
373 | lcd->backlight->props.brightness = acx565akm_get_actual_brightness(lcd); | |
374 | ||
375 | acx565akm_bl_update_status_locked(lcd->backlight); | |
376 | ||
377 | return 0; | |
378 | } | |
379 | ||
380 | static void acx565akm_backlight_cleanup(struct acx565akm_panel *lcd) | |
381 | { | |
382 | if (lcd->has_cabc) | |
383 | sysfs_remove_group(&lcd->backlight->dev.kobj, | |
384 | &acx565akm_cabc_attr_group); | |
385 | ||
386 | backlight_device_unregister(lcd->backlight); | |
387 | } | |
388 | ||
389 | /* ----------------------------------------------------------------------------- | |
390 | * DRM Bridge Operations | |
391 | */ | |
392 | ||
393 | static void acx565akm_set_sleep_mode(struct acx565akm_panel *lcd, int on) | |
394 | { | |
395 | int cmd = on ? MIPI_DCS_ENTER_SLEEP_MODE : MIPI_DCS_EXIT_SLEEP_MODE; | |
396 | unsigned long wait; | |
397 | ||
398 | /* | |
399 | * We have to keep 120msec between sleep in/out commands. | |
400 | * (8.2.15, 8.2.16). | |
401 | */ | |
402 | wait = lcd->hw_guard_end - jiffies; | |
403 | if ((long)wait > 0 && wait <= lcd->hw_guard_wait) { | |
404 | set_current_state(TASK_UNINTERRUPTIBLE); | |
405 | schedule_timeout(wait); | |
406 | } | |
407 | ||
408 | acx565akm_cmd(lcd, cmd); | |
409 | ||
410 | lcd->hw_guard_wait = msecs_to_jiffies(120); | |
411 | lcd->hw_guard_end = jiffies + lcd->hw_guard_wait; | |
412 | } | |
413 | ||
414 | static void acx565akm_set_display_state(struct acx565akm_panel *lcd, | |
415 | int enabled) | |
416 | { | |
417 | int cmd = enabled ? MIPI_DCS_SET_DISPLAY_ON : MIPI_DCS_SET_DISPLAY_OFF; | |
418 | ||
419 | acx565akm_cmd(lcd, cmd); | |
420 | } | |
421 | ||
422 | static int acx565akm_power_on(struct acx565akm_panel *lcd) | |
423 | { | |
424 | /*FIXME tweak me */ | |
425 | msleep(50); | |
426 | ||
427 | gpiod_set_value(lcd->reset_gpio, 1); | |
428 | ||
429 | if (lcd->enabled) { | |
430 | dev_dbg(&lcd->spi->dev, "panel already enabled\n"); | |
431 | return 0; | |
432 | } | |
433 | ||
434 | /* | |
435 | * We have to meet all the following delay requirements: | |
436 | * 1. tRW: reset pulse width 10usec (7.12.1) | |
437 | * 2. tRT: reset cancel time 5msec (7.12.1) | |
438 | * 3. Providing PCLK,HS,VS signals for 2 frames = ~50msec worst | |
439 | * case (7.6.2) | |
440 | * 4. 120msec before the sleep out command (7.12.1) | |
441 | */ | |
442 | msleep(120); | |
443 | ||
444 | acx565akm_set_sleep_mode(lcd, 0); | |
445 | lcd->enabled = true; | |
446 | ||
447 | /* 5msec between sleep out and the next command. (8.2.16) */ | |
448 | usleep_range(5000, 10000); | |
449 | acx565akm_set_display_state(lcd, 1); | |
450 | acx565akm_set_cabc_mode(lcd, lcd->cabc_mode); | |
451 | ||
452 | return acx565akm_bl_update_status_locked(lcd->backlight); | |
453 | } | |
454 | ||
455 | static void acx565akm_power_off(struct acx565akm_panel *lcd) | |
456 | { | |
1c8fc3f0 LP |
457 | acx565akm_set_display_state(lcd, 0); |
458 | acx565akm_set_sleep_mode(lcd, 1); | |
459 | lcd->enabled = false; | |
460 | /* | |
461 | * We have to provide PCLK,HS,VS signals for 2 frames (worst case | |
462 | * ~50msec) after sending the sleep in command and asserting the | |
463 | * reset signal. We probably could assert the reset w/o the delay | |
464 | * but we still delay to avoid possible artifacts. (7.6.1) | |
465 | */ | |
466 | msleep(50); | |
467 | ||
468 | gpiod_set_value(lcd->reset_gpio, 0); | |
469 | ||
470 | /* FIXME need to tweak this delay */ | |
471 | msleep(100); | |
472 | } | |
473 | ||
474 | static int acx565akm_disable(struct drm_panel *panel) | |
475 | { | |
476 | struct acx565akm_panel *lcd = to_acx565akm_device(panel); | |
477 | ||
478 | mutex_lock(&lcd->mutex); | |
479 | acx565akm_power_off(lcd); | |
480 | mutex_unlock(&lcd->mutex); | |
481 | ||
482 | return 0; | |
483 | } | |
484 | ||
485 | static int acx565akm_enable(struct drm_panel *panel) | |
486 | { | |
487 | struct acx565akm_panel *lcd = to_acx565akm_device(panel); | |
488 | ||
489 | mutex_lock(&lcd->mutex); | |
490 | acx565akm_power_on(lcd); | |
491 | mutex_unlock(&lcd->mutex); | |
492 | ||
493 | return 0; | |
494 | } | |
495 | ||
496 | static const struct drm_display_mode acx565akm_mode = { | |
497 | .clock = 24000, | |
498 | .hdisplay = 800, | |
499 | .hsync_start = 800 + 28, | |
500 | .hsync_end = 800 + 28 + 4, | |
501 | .htotal = 800 + 28 + 4 + 24, | |
502 | .vdisplay = 480, | |
503 | .vsync_start = 480 + 3, | |
504 | .vsync_end = 480 + 3 + 3, | |
505 | .vtotal = 480 + 3 + 3 + 4, | |
1c8fc3f0 LP |
506 | .type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED, |
507 | .flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC, | |
508 | .width_mm = 77, | |
509 | .height_mm = 46, | |
510 | }; | |
511 | ||
0ce8ddd8 SR |
512 | static int acx565akm_get_modes(struct drm_panel *panel, |
513 | struct drm_connector *connector) | |
1c8fc3f0 | 514 | { |
1c8fc3f0 LP |
515 | struct drm_display_mode *mode; |
516 | ||
aa6c4364 | 517 | mode = drm_mode_duplicate(connector->dev, &acx565akm_mode); |
1c8fc3f0 LP |
518 | if (!mode) |
519 | return -ENOMEM; | |
520 | ||
521 | drm_mode_set_name(mode); | |
522 | drm_mode_probed_add(connector, mode); | |
523 | ||
524 | connector->display_info.width_mm = acx565akm_mode.width_mm; | |
525 | connector->display_info.height_mm = acx565akm_mode.height_mm; | |
526 | connector->display_info.bus_flags = DRM_BUS_FLAG_DE_HIGH | |
527 | | DRM_BUS_FLAG_SYNC_SAMPLE_POSEDGE | |
528 | | DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE; | |
529 | ||
530 | return 1; | |
531 | } | |
532 | ||
533 | static const struct drm_panel_funcs acx565akm_funcs = { | |
534 | .disable = acx565akm_disable, | |
535 | .enable = acx565akm_enable, | |
536 | .get_modes = acx565akm_get_modes, | |
537 | }; | |
538 | ||
539 | /* ----------------------------------------------------------------------------- | |
540 | * Probe, Detect and Remove | |
541 | */ | |
542 | ||
543 | static int acx565akm_detect(struct acx565akm_panel *lcd) | |
544 | { | |
545 | __be32 value; | |
546 | u32 status; | |
547 | int ret = 0; | |
548 | ||
549 | /* | |
550 | * After being taken out of reset the panel needs 5ms before the first | |
551 | * command can be sent. | |
552 | */ | |
553 | gpiod_set_value(lcd->reset_gpio, 1); | |
554 | usleep_range(5000, 10000); | |
555 | ||
556 | acx565akm_read(lcd, MIPI_DCS_GET_DISPLAY_STATUS, (u8 *)&value, 4); | |
557 | status = __be32_to_cpu(value); | |
558 | lcd->enabled = (status & (1 << 17)) && (status & (1 << 10)); | |
559 | ||
560 | dev_dbg(&lcd->spi->dev, | |
561 | "LCD panel %s by bootloader (status 0x%04x)\n", | |
562 | lcd->enabled ? "enabled" : "disabled ", status); | |
563 | ||
564 | acx565akm_read(lcd, MIPI_DCS_GET_DISPLAY_ID, lcd->display_id, 3); | |
565 | dev_dbg(&lcd->spi->dev, "MIPI display ID: %02x%02x%02x\n", | |
566 | lcd->display_id[0], lcd->display_id[1], lcd->display_id[2]); | |
567 | ||
568 | switch (lcd->display_id[0]) { | |
569 | case 0x10: | |
570 | lcd->model = MIPID_VER_ACX565AKM; | |
571 | lcd->name = "acx565akm"; | |
572 | lcd->has_bc = 1; | |
573 | lcd->has_cabc = 1; | |
574 | break; | |
575 | case 0x29: | |
576 | lcd->model = MIPID_VER_L4F00311; | |
577 | lcd->name = "l4f00311"; | |
578 | break; | |
579 | case 0x45: | |
580 | lcd->model = MIPID_VER_LPH8923; | |
581 | lcd->name = "lph8923"; | |
582 | break; | |
583 | case 0x83: | |
584 | lcd->model = MIPID_VER_LS041Y3; | |
585 | lcd->name = "ls041y3"; | |
586 | break; | |
587 | default: | |
588 | lcd->name = "unknown"; | |
589 | dev_err(&lcd->spi->dev, "unknown display ID\n"); | |
590 | ret = -ENODEV; | |
591 | goto done; | |
592 | } | |
593 | ||
594 | lcd->revision = lcd->display_id[1]; | |
595 | ||
596 | dev_info(&lcd->spi->dev, "%s rev %02x panel detected\n", | |
597 | lcd->name, lcd->revision); | |
598 | ||
599 | done: | |
600 | if (!lcd->enabled) | |
601 | gpiod_set_value(lcd->reset_gpio, 0); | |
602 | ||
603 | return ret; | |
604 | } | |
605 | ||
606 | static int acx565akm_probe(struct spi_device *spi) | |
607 | { | |
608 | struct acx565akm_panel *lcd; | |
609 | int ret; | |
610 | ||
611 | lcd = devm_kzalloc(&spi->dev, sizeof(*lcd), GFP_KERNEL); | |
415b8dd0 | 612 | if (!lcd) |
1c8fc3f0 LP |
613 | return -ENOMEM; |
614 | ||
615 | spi_set_drvdata(spi, lcd); | |
616 | spi->mode = SPI_MODE_3; | |
617 | ||
618 | lcd->spi = spi; | |
619 | mutex_init(&lcd->mutex); | |
620 | ||
7c4bada1 | 621 | lcd->reset_gpio = devm_gpiod_get(&spi->dev, "reset", GPIOD_OUT_HIGH); |
1c8fc3f0 LP |
622 | if (IS_ERR(lcd->reset_gpio)) { |
623 | dev_err(&spi->dev, "failed to get reset GPIO\n"); | |
624 | return PTR_ERR(lcd->reset_gpio); | |
625 | } | |
626 | ||
627 | ret = acx565akm_detect(lcd); | |
628 | if (ret < 0) { | |
629 | dev_err(&spi->dev, "panel detection failed\n"); | |
630 | return ret; | |
631 | } | |
632 | ||
633 | if (lcd->has_bc) { | |
634 | ret = acx565akm_backlight_init(lcd); | |
635 | if (ret < 0) | |
636 | return ret; | |
637 | } | |
638 | ||
9a2654c0 LP |
639 | drm_panel_init(&lcd->panel, &lcd->spi->dev, &acx565akm_funcs, |
640 | DRM_MODE_CONNECTOR_DPI); | |
1c8fc3f0 | 641 | |
c3ee8c65 | 642 | drm_panel_add(&lcd->panel); |
1c8fc3f0 LP |
643 | |
644 | return 0; | |
645 | } | |
646 | ||
a0386bba | 647 | static void acx565akm_remove(struct spi_device *spi) |
1c8fc3f0 LP |
648 | { |
649 | struct acx565akm_panel *lcd = spi_get_drvdata(spi); | |
650 | ||
651 | drm_panel_remove(&lcd->panel); | |
652 | ||
653 | if (lcd->has_bc) | |
654 | acx565akm_backlight_cleanup(lcd); | |
1c8fc3f0 LP |
655 | } |
656 | ||
657 | static const struct of_device_id acx565akm_of_match[] = { | |
658 | { .compatible = "sony,acx565akm", }, | |
659 | { /* sentinel */ }, | |
660 | }; | |
661 | ||
662 | MODULE_DEVICE_TABLE(of, acx565akm_of_match); | |
663 | ||
d82a6ac3 LP |
664 | static const struct spi_device_id acx565akm_ids[] = { |
665 | { "acx565akm", 0 }, | |
666 | { /* sentinel */ } | |
667 | }; | |
668 | ||
669 | MODULE_DEVICE_TABLE(spi, acx565akm_ids); | |
670 | ||
1c8fc3f0 LP |
671 | static struct spi_driver acx565akm_driver = { |
672 | .probe = acx565akm_probe, | |
673 | .remove = acx565akm_remove, | |
d82a6ac3 | 674 | .id_table = acx565akm_ids, |
1c8fc3f0 LP |
675 | .driver = { |
676 | .name = "panel-sony-acx565akm", | |
677 | .of_match_table = acx565akm_of_match, | |
678 | }, | |
679 | }; | |
680 | ||
681 | module_spi_driver(acx565akm_driver); | |
682 | ||
1c8fc3f0 LP |
683 | MODULE_AUTHOR("Nokia Corporation"); |
684 | MODULE_DESCRIPTION("Sony ACX565AKM LCD Panel Driver"); | |
685 | MODULE_LICENSE("GPL"); |