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 | |
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) |
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: &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(t: x, m: &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(t: x, m: &m); |
109 | } |
110 | |
111 | if (rlen) { |
112 | x++; |
113 | x->rx_buf = rbuf; |
114 | x->len = rlen; |
115 | spi_message_add_tail(t: x, m: &m); |
116 | } |
117 | |
118 | ret = spi_sync(spi: lcd->spi, message: &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, wlen: 0, NULL, rlen: 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, cmd: reg, wbuf: buf, wlen: len, NULL, rlen: 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, cmd: reg, NULL, wlen: 0, rbuf: buf, rlen: 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, buf: (u8 *)&cabc_ctrl, len: 1); |
159 | cabc_ctrl &= ~3; |
160 | cabc_ctrl |= (1 << 8) | (mode & 3); |
161 | acx565akm_write(lcd, MIPID_CMD_WRITE_CABC, buf: (u8 *)&cabc_ctrl, len: 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, buf: &cabc_ctrl, len: 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, fmt: "%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, mode: i); |
227 | mutex_unlock(lock: &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, fmt: "%s\n" , acx565akm_cabc_modes[0]); |
242 | |
243 | for (i = 0; i < ARRAY_SIZE(acx565akm_cabc_modes); i++) |
244 | len += sprintf(buf: &buf[len], fmt: "%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, reg: MIPI_DCS_GET_DISPLAY_BRIGHTNESS, buf: &bv, len: 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, reg: MIPI_DCS_SET_DISPLAY_BRIGHTNESS, buf: (u8 *)&bv, len: 2); |
285 | |
286 | acx565akm_read(lcd, reg: MIPI_DCS_GET_CONTROL_DISPLAY, buf: (u8 *)&ctrl, len: 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, reg: MIPI_DCS_WRITE_CONTROL_DISPLAY, buf: (u8 *)&ctrl, len: 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->dev); |
301 | int level = backlight_get_brightness(bd: dev); |
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->dev); |
311 | int ret; |
312 | |
313 | mutex_lock(&lcd->mutex); |
314 | ret = acx565akm_bl_update_status_locked(dev); |
315 | mutex_unlock(lock: &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->dev); |
323 | unsigned int intensity; |
324 | |
325 | mutex_lock(&lcd->mutex); |
326 | |
327 | if (!backlight_is_blank(bd: dev)) |
328 | intensity = acx565akm_get_actual_brightness(lcd); |
329 | else |
330 | intensity = 0; |
331 | |
332 | mutex_unlock(lock: &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 = { |
345 | .power = FB_BLANK_UNBLANK, |
346 | .type = BACKLIGHT_RAW, |
347 | }; |
348 | int ret; |
349 | |
350 | lcd->backlight = backlight_device_register(name: lcd->name, dev: &lcd->spi->dev, |
351 | devdata: lcd, ops: &acx565akm_bl_ops, |
352 | props: &props); |
353 | if (IS_ERR(ptr: lcd->backlight)) { |
354 | ret = PTR_ERR(ptr: lcd->backlight); |
355 | lcd->backlight = NULL; |
356 | return ret; |
357 | } |
358 | |
359 | if (lcd->has_cabc) { |
360 | ret = sysfs_create_group(kobj: &lcd->backlight->dev.kobj, |
361 | grp: &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(bd: 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(dev: 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(kobj: &lcd->backlight->dev.kobj, |
384 | grp: &acx565akm_cabc_attr_group); |
385 | |
386 | backlight_device_unregister(bd: 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(timeout: wait); |
406 | } |
407 | |
408 | acx565akm_cmd(lcd, cmd); |
409 | |
410 | lcd->hw_guard_wait = msecs_to_jiffies(m: 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(msecs: 50); |
426 | |
427 | gpiod_set_value(desc: lcd->reset_gpio, value: 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(msecs: 120); |
443 | |
444 | acx565akm_set_sleep_mode(lcd, on: 0); |
445 | lcd->enabled = true; |
446 | |
447 | /* 5msec between sleep out and the next command. (8.2.16) */ |
448 | usleep_range(min: 5000, max: 10000); |
449 | acx565akm_set_display_state(lcd, enabled: 1); |
450 | acx565akm_set_cabc_mode(lcd, mode: lcd->cabc_mode); |
451 | |
452 | return acx565akm_bl_update_status_locked(dev: lcd->backlight); |
453 | } |
454 | |
455 | static void acx565akm_power_off(struct acx565akm_panel *lcd) |
456 | { |
457 | if (!lcd->enabled) |
458 | return; |
459 | |
460 | acx565akm_set_display_state(lcd, enabled: 0); |
461 | acx565akm_set_sleep_mode(lcd, on: 1); |
462 | lcd->enabled = false; |
463 | /* |
464 | * We have to provide PCLK,HS,VS signals for 2 frames (worst case |
465 | * ~50msec) after sending the sleep in command and asserting the |
466 | * reset signal. We probably could assert the reset w/o the delay |
467 | * but we still delay to avoid possible artifacts. (7.6.1) |
468 | */ |
469 | msleep(msecs: 50); |
470 | |
471 | gpiod_set_value(desc: lcd->reset_gpio, value: 0); |
472 | |
473 | /* FIXME need to tweak this delay */ |
474 | msleep(msecs: 100); |
475 | } |
476 | |
477 | static int acx565akm_disable(struct drm_panel *panel) |
478 | { |
479 | struct acx565akm_panel *lcd = to_acx565akm_device(panel); |
480 | |
481 | mutex_lock(&lcd->mutex); |
482 | acx565akm_power_off(lcd); |
483 | mutex_unlock(lock: &lcd->mutex); |
484 | |
485 | return 0; |
486 | } |
487 | |
488 | static int acx565akm_enable(struct drm_panel *panel) |
489 | { |
490 | struct acx565akm_panel *lcd = to_acx565akm_device(panel); |
491 | |
492 | mutex_lock(&lcd->mutex); |
493 | acx565akm_power_on(lcd); |
494 | mutex_unlock(lock: &lcd->mutex); |
495 | |
496 | return 0; |
497 | } |
498 | |
499 | static const struct drm_display_mode acx565akm_mode = { |
500 | .clock = 24000, |
501 | .hdisplay = 800, |
502 | .hsync_start = 800 + 28, |
503 | .hsync_end = 800 + 28 + 4, |
504 | .htotal = 800 + 28 + 4 + 24, |
505 | .vdisplay = 480, |
506 | .vsync_start = 480 + 3, |
507 | .vsync_end = 480 + 3 + 3, |
508 | .vtotal = 480 + 3 + 3 + 4, |
509 | .type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED, |
510 | .flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC, |
511 | .width_mm = 77, |
512 | .height_mm = 46, |
513 | }; |
514 | |
515 | static int acx565akm_get_modes(struct drm_panel *panel, |
516 | struct drm_connector *connector) |
517 | { |
518 | struct drm_display_mode *mode; |
519 | |
520 | mode = drm_mode_duplicate(dev: connector->dev, mode: &acx565akm_mode); |
521 | if (!mode) |
522 | return -ENOMEM; |
523 | |
524 | drm_mode_set_name(mode); |
525 | drm_mode_probed_add(connector, mode); |
526 | |
527 | connector->display_info.width_mm = acx565akm_mode.width_mm; |
528 | connector->display_info.height_mm = acx565akm_mode.height_mm; |
529 | connector->display_info.bus_flags = DRM_BUS_FLAG_DE_HIGH |
530 | | DRM_BUS_FLAG_SYNC_SAMPLE_POSEDGE |
531 | | DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE; |
532 | |
533 | return 1; |
534 | } |
535 | |
536 | static const struct drm_panel_funcs acx565akm_funcs = { |
537 | .disable = acx565akm_disable, |
538 | .enable = acx565akm_enable, |
539 | .get_modes = acx565akm_get_modes, |
540 | }; |
541 | |
542 | /* ----------------------------------------------------------------------------- |
543 | * Probe, Detect and Remove |
544 | */ |
545 | |
546 | static int acx565akm_detect(struct acx565akm_panel *lcd) |
547 | { |
548 | __be32 value; |
549 | u32 status; |
550 | int ret = 0; |
551 | |
552 | /* |
553 | * After being taken out of reset the panel needs 5ms before the first |
554 | * command can be sent. |
555 | */ |
556 | gpiod_set_value(desc: lcd->reset_gpio, value: 1); |
557 | usleep_range(min: 5000, max: 10000); |
558 | |
559 | acx565akm_read(lcd, reg: MIPI_DCS_GET_DISPLAY_STATUS, buf: (u8 *)&value, len: 4); |
560 | status = __be32_to_cpu(value); |
561 | lcd->enabled = (status & (1 << 17)) && (status & (1 << 10)); |
562 | |
563 | dev_dbg(&lcd->spi->dev, |
564 | "LCD panel %s by bootloader (status 0x%04x)\n" , |
565 | lcd->enabled ? "enabled" : "disabled " , status); |
566 | |
567 | acx565akm_read(lcd, reg: MIPI_DCS_GET_DISPLAY_ID, buf: lcd->display_id, len: 3); |
568 | dev_dbg(&lcd->spi->dev, "MIPI display ID: %02x%02x%02x\n" , |
569 | lcd->display_id[0], lcd->display_id[1], lcd->display_id[2]); |
570 | |
571 | switch (lcd->display_id[0]) { |
572 | case 0x10: |
573 | lcd->model = MIPID_VER_ACX565AKM; |
574 | lcd->name = "acx565akm" ; |
575 | lcd->has_bc = 1; |
576 | lcd->has_cabc = 1; |
577 | break; |
578 | case 0x29: |
579 | lcd->model = MIPID_VER_L4F00311; |
580 | lcd->name = "l4f00311" ; |
581 | break; |
582 | case 0x45: |
583 | lcd->model = MIPID_VER_LPH8923; |
584 | lcd->name = "lph8923" ; |
585 | break; |
586 | case 0x83: |
587 | lcd->model = MIPID_VER_LS041Y3; |
588 | lcd->name = "ls041y3" ; |
589 | break; |
590 | default: |
591 | lcd->name = "unknown" ; |
592 | dev_err(&lcd->spi->dev, "unknown display ID\n" ); |
593 | ret = -ENODEV; |
594 | goto done; |
595 | } |
596 | |
597 | lcd->revision = lcd->display_id[1]; |
598 | |
599 | dev_info(&lcd->spi->dev, "%s rev %02x panel detected\n" , |
600 | lcd->name, lcd->revision); |
601 | |
602 | done: |
603 | if (!lcd->enabled) |
604 | gpiod_set_value(desc: lcd->reset_gpio, value: 0); |
605 | |
606 | return ret; |
607 | } |
608 | |
609 | static int acx565akm_probe(struct spi_device *spi) |
610 | { |
611 | struct acx565akm_panel *lcd; |
612 | int ret; |
613 | |
614 | lcd = devm_kzalloc(dev: &spi->dev, size: sizeof(*lcd), GFP_KERNEL); |
615 | if (!lcd) |
616 | return -ENOMEM; |
617 | |
618 | spi_set_drvdata(spi, data: lcd); |
619 | spi->mode = SPI_MODE_3; |
620 | |
621 | lcd->spi = spi; |
622 | mutex_init(&lcd->mutex); |
623 | |
624 | lcd->reset_gpio = devm_gpiod_get(dev: &spi->dev, con_id: "reset" , flags: GPIOD_OUT_HIGH); |
625 | if (IS_ERR(ptr: lcd->reset_gpio)) { |
626 | dev_err(&spi->dev, "failed to get reset GPIO\n" ); |
627 | return PTR_ERR(ptr: lcd->reset_gpio); |
628 | } |
629 | |
630 | ret = acx565akm_detect(lcd); |
631 | if (ret < 0) { |
632 | dev_err(&spi->dev, "panel detection failed\n" ); |
633 | return ret; |
634 | } |
635 | |
636 | if (lcd->has_bc) { |
637 | ret = acx565akm_backlight_init(lcd); |
638 | if (ret < 0) |
639 | return ret; |
640 | } |
641 | |
642 | drm_panel_init(panel: &lcd->panel, dev: &lcd->spi->dev, funcs: &acx565akm_funcs, |
643 | DRM_MODE_CONNECTOR_DPI); |
644 | |
645 | drm_panel_add(panel: &lcd->panel); |
646 | |
647 | return 0; |
648 | } |
649 | |
650 | static void acx565akm_remove(struct spi_device *spi) |
651 | { |
652 | struct acx565akm_panel *lcd = spi_get_drvdata(spi); |
653 | |
654 | drm_panel_remove(panel: &lcd->panel); |
655 | |
656 | if (lcd->has_bc) |
657 | acx565akm_backlight_cleanup(lcd); |
658 | |
659 | drm_panel_disable(panel: &lcd->panel); |
660 | drm_panel_unprepare(panel: &lcd->panel); |
661 | } |
662 | |
663 | static const struct of_device_id acx565akm_of_match[] = { |
664 | { .compatible = "sony,acx565akm" , }, |
665 | { /* sentinel */ }, |
666 | }; |
667 | |
668 | MODULE_DEVICE_TABLE(of, acx565akm_of_match); |
669 | |
670 | static const struct spi_device_id acx565akm_ids[] = { |
671 | { "acx565akm" , 0 }, |
672 | { /* sentinel */ } |
673 | }; |
674 | |
675 | MODULE_DEVICE_TABLE(spi, acx565akm_ids); |
676 | |
677 | static struct spi_driver acx565akm_driver = { |
678 | .probe = acx565akm_probe, |
679 | .remove = acx565akm_remove, |
680 | .id_table = acx565akm_ids, |
681 | .driver = { |
682 | .name = "panel-sony-acx565akm" , |
683 | .of_match_table = acx565akm_of_match, |
684 | }, |
685 | }; |
686 | |
687 | module_spi_driver(acx565akm_driver); |
688 | |
689 | MODULE_AUTHOR("Nokia Corporation" ); |
690 | MODULE_DESCRIPTION("Sony ACX565AKM LCD Panel Driver" ); |
691 | MODULE_LICENSE("GPL" ); |
692 | |