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068a0023 AH |
1 | /* |
2 | * MIPI DSI Bus | |
3 | * | |
4 | * Copyright (C) 2012-2013, Samsung Electronics, Co., Ltd. | |
5 | * Andrzej Hajda <a.hajda@samsung.com> | |
6 | * | |
7 | * Permission is hereby granted, free of charge, to any person obtaining a | |
8 | * copy of this software and associated documentation files (the | |
9 | * "Software"), to deal in the Software without restriction, including | |
10 | * without limitation the rights to use, copy, modify, merge, publish, | |
11 | * distribute, sub license, and/or sell copies of the Software, and to | |
12 | * permit persons to whom the Software is furnished to do so, subject to | |
13 | * the following conditions: | |
14 | * | |
15 | * The above copyright notice and this permission notice (including the | |
16 | * next paragraph) shall be included in all copies or substantial portions | |
17 | * of the Software. | |
18 | * | |
19 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
20 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
21 | * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL | |
22 | * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, | |
23 | * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR | |
24 | * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE | |
25 | * USE OR OTHER DEALINGS IN THE SOFTWARE. | |
26 | */ | |
27 | ||
28 | #include <drm/drm_mipi_dsi.h> | |
29 | ||
30 | #include <linux/device.h> | |
31 | #include <linux/module.h> | |
32 | #include <linux/of_device.h> | |
33 | #include <linux/pm_runtime.h> | |
34 | #include <linux/slab.h> | |
35 | ||
36 | #include <video/mipi_display.h> | |
37 | ||
009081e0 TR |
38 | /** |
39 | * DOC: dsi helpers | |
40 | * | |
41 | * These functions contain some common logic and helpers to deal with MIPI DSI | |
42 | * peripherals. | |
43 | * | |
44 | * Helpers are provided for a number of standard MIPI DSI command as well as a | |
45 | * subset of the MIPI DCS command set. | |
46 | */ | |
47 | ||
068a0023 AH |
48 | static int mipi_dsi_device_match(struct device *dev, struct device_driver *drv) |
49 | { | |
bf4363ce AT |
50 | struct mipi_dsi_device *dsi = to_mipi_dsi_device(dev); |
51 | ||
52 | /* attempt OF style match */ | |
53 | if (of_driver_match_device(dev, drv)) | |
54 | return 1; | |
55 | ||
56 | /* compare DSI device and driver names */ | |
57 | if (!strcmp(dsi->name, drv->name)) | |
58 | return 1; | |
59 | ||
60 | return 0; | |
068a0023 AH |
61 | } |
62 | ||
babb24fe TR |
63 | static int mipi_dsi_uevent(struct device *dev, struct kobj_uevent_env *env) |
64 | { | |
65 | struct mipi_dsi_device *dsi = to_mipi_dsi_device(dev); | |
66 | int err; | |
67 | ||
68 | err = of_device_uevent_modalias(dev, env); | |
69 | if (err != -ENODEV) | |
70 | return err; | |
71 | ||
72 | add_uevent_var(env, "MODALIAS=%s%s", MIPI_DSI_MODULE_PREFIX, | |
73 | dsi->name); | |
74 | ||
75 | return 0; | |
76 | } | |
77 | ||
068a0023 AH |
78 | static const struct dev_pm_ops mipi_dsi_device_pm_ops = { |
79 | .runtime_suspend = pm_generic_runtime_suspend, | |
80 | .runtime_resume = pm_generic_runtime_resume, | |
81 | .suspend = pm_generic_suspend, | |
82 | .resume = pm_generic_resume, | |
83 | .freeze = pm_generic_freeze, | |
84 | .thaw = pm_generic_thaw, | |
85 | .poweroff = pm_generic_poweroff, | |
86 | .restore = pm_generic_restore, | |
87 | }; | |
88 | ||
89 | static struct bus_type mipi_dsi_bus_type = { | |
90 | .name = "mipi-dsi", | |
91 | .match = mipi_dsi_device_match, | |
babb24fe | 92 | .uevent = mipi_dsi_uevent, |
068a0023 AH |
93 | .pm = &mipi_dsi_device_pm_ops, |
94 | }; | |
95 | ||
3ef05924 TR |
96 | static int of_device_match(struct device *dev, void *data) |
97 | { | |
98 | return dev->of_node == data; | |
99 | } | |
100 | ||
101 | /** | |
102 | * of_find_mipi_dsi_device_by_node() - find the MIPI DSI device matching a | |
103 | * device tree node | |
104 | * @np: device tree node | |
105 | * | |
106 | * Return: A pointer to the MIPI DSI device corresponding to @np or NULL if no | |
107 | * such device exists (or has not been registered yet). | |
108 | */ | |
109 | struct mipi_dsi_device *of_find_mipi_dsi_device_by_node(struct device_node *np) | |
110 | { | |
111 | struct device *dev; | |
112 | ||
113 | dev = bus_find_device(&mipi_dsi_bus_type, NULL, np, of_device_match); | |
114 | ||
115 | return dev ? to_mipi_dsi_device(dev) : NULL; | |
116 | } | |
117 | EXPORT_SYMBOL(of_find_mipi_dsi_device_by_node); | |
118 | ||
068a0023 AH |
119 | static void mipi_dsi_dev_release(struct device *dev) |
120 | { | |
121 | struct mipi_dsi_device *dsi = to_mipi_dsi_device(dev); | |
122 | ||
123 | of_node_put(dev->of_node); | |
124 | kfree(dsi); | |
125 | } | |
126 | ||
127 | static const struct device_type mipi_dsi_device_type = { | |
128 | .release = mipi_dsi_dev_release, | |
129 | }; | |
130 | ||
131 | static struct mipi_dsi_device *mipi_dsi_device_alloc(struct mipi_dsi_host *host) | |
132 | { | |
133 | struct mipi_dsi_device *dsi; | |
134 | ||
135 | dsi = kzalloc(sizeof(*dsi), GFP_KERNEL); | |
136 | if (!dsi) | |
137 | return ERR_PTR(-ENOMEM); | |
138 | ||
139 | dsi->host = host; | |
140 | dsi->dev.bus = &mipi_dsi_bus_type; | |
141 | dsi->dev.parent = host->dev; | |
142 | dsi->dev.type = &mipi_dsi_device_type; | |
143 | ||
144 | device_initialize(&dsi->dev); | |
145 | ||
146 | return dsi; | |
147 | } | |
148 | ||
149 | static int mipi_dsi_device_add(struct mipi_dsi_device *dsi) | |
150 | { | |
151 | struct mipi_dsi_host *host = dsi->host; | |
152 | ||
153 | dev_set_name(&dsi->dev, "%s.%d", dev_name(host->dev), dsi->channel); | |
154 | ||
155 | return device_add(&dsi->dev); | |
156 | } | |
157 | ||
fc903ebd | 158 | #if IS_ENABLED(CONFIG_OF) |
068a0023 AH |
159 | static struct mipi_dsi_device * |
160 | of_mipi_dsi_device_add(struct mipi_dsi_host *host, struct device_node *node) | |
161 | { | |
068a0023 | 162 | struct device *dev = host->dev; |
c63ae8a9 | 163 | struct mipi_dsi_device_info info = { }; |
068a0023 AH |
164 | int ret; |
165 | u32 reg; | |
166 | ||
bf4363ce AT |
167 | if (of_modalias_node(node, info.type, sizeof(info.type)) < 0) { |
168 | dev_err(dev, "modalias failure on %s\n", node->full_name); | |
169 | return ERR_PTR(-EINVAL); | |
170 | } | |
171 | ||
068a0023 AH |
172 | ret = of_property_read_u32(node, "reg", ®); |
173 | if (ret) { | |
174 | dev_err(dev, "device node %s has no valid reg property: %d\n", | |
175 | node->full_name, ret); | |
176 | return ERR_PTR(-EINVAL); | |
177 | } | |
178 | ||
c63ae8a9 AT |
179 | info.channel = reg; |
180 | info.node = of_node_get(node); | |
181 | ||
182 | return mipi_dsi_device_register_full(host, &info); | |
183 | } | |
184 | #else | |
185 | static struct mipi_dsi_device * | |
186 | of_mipi_dsi_device_add(struct mipi_dsi_host *host, struct device_node *node) | |
187 | { | |
188 | return ERR_PTR(-ENODEV); | |
189 | } | |
190 | #endif | |
191 | ||
192 | /** | |
193 | * mipi_dsi_device_register_full - create a MIPI DSI device | |
194 | * @host: DSI host to which this device is connected | |
195 | * @info: pointer to template containing DSI device information | |
196 | * | |
197 | * Create a MIPI DSI device by using the device information provided by | |
198 | * mipi_dsi_device_info template | |
199 | * | |
200 | * Returns: | |
201 | * A pointer to the newly created MIPI DSI device, or, a pointer encoded | |
202 | * with an error | |
203 | */ | |
204 | struct mipi_dsi_device * | |
205 | mipi_dsi_device_register_full(struct mipi_dsi_host *host, | |
206 | const struct mipi_dsi_device_info *info) | |
207 | { | |
208 | struct mipi_dsi_device *dsi; | |
209 | struct device *dev = host->dev; | |
210 | int ret; | |
211 | ||
212 | if (!info) { | |
213 | dev_err(dev, "invalid mipi_dsi_device_info pointer\n"); | |
214 | return ERR_PTR(-EINVAL); | |
215 | } | |
216 | ||
217 | if (info->channel > 3) { | |
218 | dev_err(dev, "invalid virtual channel: %u\n", info->channel); | |
068a0023 AH |
219 | return ERR_PTR(-EINVAL); |
220 | } | |
221 | ||
222 | dsi = mipi_dsi_device_alloc(host); | |
223 | if (IS_ERR(dsi)) { | |
c63ae8a9 AT |
224 | dev_err(dev, "failed to allocate DSI device %ld\n", |
225 | PTR_ERR(dsi)); | |
068a0023 AH |
226 | return dsi; |
227 | } | |
228 | ||
c63ae8a9 AT |
229 | dsi->dev.of_node = info->node; |
230 | dsi->channel = info->channel; | |
bf4363ce | 231 | strlcpy(dsi->name, info->type, sizeof(dsi->name)); |
068a0023 AH |
232 | |
233 | ret = mipi_dsi_device_add(dsi); | |
234 | if (ret) { | |
c63ae8a9 | 235 | dev_err(dev, "failed to add DSI device %d\n", ret); |
068a0023 AH |
236 | kfree(dsi); |
237 | return ERR_PTR(ret); | |
238 | } | |
239 | ||
240 | return dsi; | |
241 | } | |
c63ae8a9 | 242 | EXPORT_SYMBOL(mipi_dsi_device_register_full); |
068a0023 | 243 | |
509e42ce AT |
244 | /** |
245 | * mipi_dsi_device_unregister - unregister MIPI DSI device | |
246 | * @dsi: DSI peripheral device | |
247 | */ | |
248 | void mipi_dsi_device_unregister(struct mipi_dsi_device *dsi) | |
249 | { | |
250 | device_unregister(&dsi->dev); | |
251 | } | |
252 | EXPORT_SYMBOL(mipi_dsi_device_unregister); | |
253 | ||
97b6ae50 AT |
254 | static DEFINE_MUTEX(host_lock); |
255 | static LIST_HEAD(host_list); | |
256 | ||
257 | /** | |
258 | * of_find_mipi_dsi_host_by_node() - find the MIPI DSI host matching a | |
259 | * device tree node | |
260 | * @node: device tree node | |
261 | * | |
262 | * Returns: | |
263 | * A pointer to the MIPI DSI host corresponding to @node or NULL if no | |
264 | * such device exists (or has not been registered yet). | |
265 | */ | |
266 | struct mipi_dsi_host *of_find_mipi_dsi_host_by_node(struct device_node *node) | |
267 | { | |
268 | struct mipi_dsi_host *host; | |
269 | ||
270 | mutex_lock(&host_lock); | |
271 | ||
272 | list_for_each_entry(host, &host_list, list) { | |
273 | if (host->dev->of_node == node) { | |
274 | mutex_unlock(&host_lock); | |
275 | return host; | |
276 | } | |
277 | } | |
278 | ||
279 | mutex_unlock(&host_lock); | |
280 | ||
281 | return NULL; | |
282 | } | |
283 | EXPORT_SYMBOL(of_find_mipi_dsi_host_by_node); | |
284 | ||
068a0023 AH |
285 | int mipi_dsi_host_register(struct mipi_dsi_host *host) |
286 | { | |
287 | struct device_node *node; | |
288 | ||
e49640da AH |
289 | for_each_available_child_of_node(host->dev->of_node, node) { |
290 | /* skip nodes without reg property */ | |
291 | if (!of_find_property(node, "reg", NULL)) | |
292 | continue; | |
068a0023 | 293 | of_mipi_dsi_device_add(host, node); |
e49640da | 294 | } |
068a0023 | 295 | |
97b6ae50 AT |
296 | mutex_lock(&host_lock); |
297 | list_add_tail(&host->list, &host_list); | |
298 | mutex_unlock(&host_lock); | |
299 | ||
068a0023 AH |
300 | return 0; |
301 | } | |
302 | EXPORT_SYMBOL(mipi_dsi_host_register); | |
303 | ||
304 | static int mipi_dsi_remove_device_fn(struct device *dev, void *priv) | |
305 | { | |
306 | struct mipi_dsi_device *dsi = to_mipi_dsi_device(dev); | |
307 | ||
509e42ce | 308 | mipi_dsi_device_unregister(dsi); |
068a0023 AH |
309 | |
310 | return 0; | |
311 | } | |
312 | ||
313 | void mipi_dsi_host_unregister(struct mipi_dsi_host *host) | |
314 | { | |
315 | device_for_each_child(host->dev, NULL, mipi_dsi_remove_device_fn); | |
97b6ae50 AT |
316 | |
317 | mutex_lock(&host_lock); | |
318 | list_del_init(&host->list); | |
319 | mutex_unlock(&host_lock); | |
068a0023 AH |
320 | } |
321 | EXPORT_SYMBOL(mipi_dsi_host_unregister); | |
322 | ||
323 | /** | |
324 | * mipi_dsi_attach - attach a DSI device to its DSI host | |
325 | * @dsi: DSI peripheral | |
326 | */ | |
327 | int mipi_dsi_attach(struct mipi_dsi_device *dsi) | |
328 | { | |
329 | const struct mipi_dsi_host_ops *ops = dsi->host->ops; | |
330 | ||
331 | if (!ops || !ops->attach) | |
332 | return -ENOSYS; | |
333 | ||
334 | return ops->attach(dsi->host, dsi); | |
335 | } | |
336 | EXPORT_SYMBOL(mipi_dsi_attach); | |
337 | ||
338 | /** | |
339 | * mipi_dsi_detach - detach a DSI device from its DSI host | |
340 | * @dsi: DSI peripheral | |
341 | */ | |
342 | int mipi_dsi_detach(struct mipi_dsi_device *dsi) | |
343 | { | |
344 | const struct mipi_dsi_host_ops *ops = dsi->host->ops; | |
345 | ||
346 | if (!ops || !ops->detach) | |
347 | return -ENOSYS; | |
348 | ||
349 | return ops->detach(dsi->host, dsi); | |
350 | } | |
351 | EXPORT_SYMBOL(mipi_dsi_detach); | |
352 | ||
9eb491f3 TR |
353 | static ssize_t mipi_dsi_device_transfer(struct mipi_dsi_device *dsi, |
354 | struct mipi_dsi_msg *msg) | |
355 | { | |
356 | const struct mipi_dsi_host_ops *ops = dsi->host->ops; | |
357 | ||
358 | if (!ops || !ops->transfer) | |
359 | return -ENOSYS; | |
360 | ||
361 | if (dsi->mode_flags & MIPI_DSI_MODE_LPM) | |
362 | msg->flags |= MIPI_DSI_MSG_USE_LPM; | |
363 | ||
364 | return ops->transfer(dsi->host, msg); | |
365 | } | |
366 | ||
02acb76d TR |
367 | /** |
368 | * mipi_dsi_packet_format_is_short - check if a packet is of the short format | |
369 | * @type: MIPI DSI data type of the packet | |
370 | * | |
371 | * Return: true if the packet for the given data type is a short packet, false | |
372 | * otherwise. | |
373 | */ | |
374 | bool mipi_dsi_packet_format_is_short(u8 type) | |
375 | { | |
376 | switch (type) { | |
377 | case MIPI_DSI_V_SYNC_START: | |
378 | case MIPI_DSI_V_SYNC_END: | |
379 | case MIPI_DSI_H_SYNC_START: | |
380 | case MIPI_DSI_H_SYNC_END: | |
381 | case MIPI_DSI_END_OF_TRANSMISSION: | |
382 | case MIPI_DSI_COLOR_MODE_OFF: | |
383 | case MIPI_DSI_COLOR_MODE_ON: | |
384 | case MIPI_DSI_SHUTDOWN_PERIPHERAL: | |
385 | case MIPI_DSI_TURN_ON_PERIPHERAL: | |
386 | case MIPI_DSI_GENERIC_SHORT_WRITE_0_PARAM: | |
387 | case MIPI_DSI_GENERIC_SHORT_WRITE_1_PARAM: | |
388 | case MIPI_DSI_GENERIC_SHORT_WRITE_2_PARAM: | |
389 | case MIPI_DSI_GENERIC_READ_REQUEST_0_PARAM: | |
390 | case MIPI_DSI_GENERIC_READ_REQUEST_1_PARAM: | |
391 | case MIPI_DSI_GENERIC_READ_REQUEST_2_PARAM: | |
392 | case MIPI_DSI_DCS_SHORT_WRITE: | |
393 | case MIPI_DSI_DCS_SHORT_WRITE_PARAM: | |
394 | case MIPI_DSI_DCS_READ: | |
395 | case MIPI_DSI_SET_MAXIMUM_RETURN_PACKET_SIZE: | |
396 | return true; | |
397 | } | |
398 | ||
399 | return false; | |
400 | } | |
401 | EXPORT_SYMBOL(mipi_dsi_packet_format_is_short); | |
402 | ||
403 | /** | |
404 | * mipi_dsi_packet_format_is_long - check if a packet is of the long format | |
405 | * @type: MIPI DSI data type of the packet | |
406 | * | |
407 | * Return: true if the packet for the given data type is a long packet, false | |
408 | * otherwise. | |
409 | */ | |
410 | bool mipi_dsi_packet_format_is_long(u8 type) | |
411 | { | |
412 | switch (type) { | |
413 | case MIPI_DSI_NULL_PACKET: | |
414 | case MIPI_DSI_BLANKING_PACKET: | |
415 | case MIPI_DSI_GENERIC_LONG_WRITE: | |
416 | case MIPI_DSI_DCS_LONG_WRITE: | |
417 | case MIPI_DSI_LOOSELY_PACKED_PIXEL_STREAM_YCBCR20: | |
418 | case MIPI_DSI_PACKED_PIXEL_STREAM_YCBCR24: | |
419 | case MIPI_DSI_PACKED_PIXEL_STREAM_YCBCR16: | |
420 | case MIPI_DSI_PACKED_PIXEL_STREAM_30: | |
421 | case MIPI_DSI_PACKED_PIXEL_STREAM_36: | |
422 | case MIPI_DSI_PACKED_PIXEL_STREAM_YCBCR12: | |
423 | case MIPI_DSI_PACKED_PIXEL_STREAM_16: | |
424 | case MIPI_DSI_PACKED_PIXEL_STREAM_18: | |
425 | case MIPI_DSI_PIXEL_STREAM_3BYTE_18: | |
426 | case MIPI_DSI_PACKED_PIXEL_STREAM_24: | |
427 | return true; | |
428 | } | |
429 | ||
430 | return false; | |
431 | } | |
432 | EXPORT_SYMBOL(mipi_dsi_packet_format_is_long); | |
433 | ||
a52879e8 TR |
434 | /** |
435 | * mipi_dsi_create_packet - create a packet from a message according to the | |
436 | * DSI protocol | |
437 | * @packet: pointer to a DSI packet structure | |
438 | * @msg: message to translate into a packet | |
439 | * | |
440 | * Return: 0 on success or a negative error code on failure. | |
441 | */ | |
442 | int mipi_dsi_create_packet(struct mipi_dsi_packet *packet, | |
443 | const struct mipi_dsi_msg *msg) | |
444 | { | |
a52879e8 TR |
445 | if (!packet || !msg) |
446 | return -EINVAL; | |
447 | ||
448 | /* do some minimum sanity checking */ | |
449 | if (!mipi_dsi_packet_format_is_short(msg->type) && | |
450 | !mipi_dsi_packet_format_is_long(msg->type)) | |
451 | return -EINVAL; | |
452 | ||
453 | if (msg->channel > 3) | |
454 | return -EINVAL; | |
455 | ||
456 | memset(packet, 0, sizeof(*packet)); | |
457 | packet->header[0] = ((msg->channel & 0x3) << 6) | (msg->type & 0x3f); | |
458 | ||
459 | /* TODO: compute ECC if hardware support is not available */ | |
460 | ||
461 | /* | |
462 | * Long write packets contain the word count in header bytes 1 and 2. | |
463 | * The payload follows the header and is word count bytes long. | |
464 | * | |
465 | * Short write packets encode up to two parameters in header bytes 1 | |
466 | * and 2. | |
467 | */ | |
468 | if (mipi_dsi_packet_format_is_long(msg->type)) { | |
469 | packet->header[1] = (msg->tx_len >> 0) & 0xff; | |
470 | packet->header[2] = (msg->tx_len >> 8) & 0xff; | |
471 | ||
472 | packet->payload_length = msg->tx_len; | |
9b97383b | 473 | packet->payload = msg->tx_buf; |
a52879e8 | 474 | } else { |
9b97383b TR |
475 | const u8 *tx = msg->tx_buf; |
476 | ||
a52879e8 TR |
477 | packet->header[1] = (msg->tx_len > 0) ? tx[0] : 0; |
478 | packet->header[2] = (msg->tx_len > 1) ? tx[1] : 0; | |
479 | } | |
480 | ||
481 | packet->size = sizeof(packet->header) + packet->payload_length; | |
482 | ||
483 | return 0; | |
484 | } | |
485 | EXPORT_SYMBOL(mipi_dsi_create_packet); | |
486 | ||
6e8c9e33 WJ |
487 | /** |
488 | * mipi_dsi_shutdown_peripheral() - sends a Shutdown Peripheral command | |
489 | * @dsi: DSI peripheral device | |
490 | * | |
491 | * Return: 0 on success or a negative error code on failure. | |
492 | */ | |
493 | int mipi_dsi_shutdown_peripheral(struct mipi_dsi_device *dsi) | |
494 | { | |
495 | struct mipi_dsi_msg msg = { | |
496 | .channel = dsi->channel, | |
497 | .type = MIPI_DSI_SHUTDOWN_PERIPHERAL, | |
498 | .tx_buf = (u8 [2]) { 0, 0 }, | |
499 | .tx_len = 2, | |
500 | }; | |
501 | ||
502 | return mipi_dsi_device_transfer(dsi, &msg); | |
503 | } | |
504 | EXPORT_SYMBOL(mipi_dsi_shutdown_peripheral); | |
505 | ||
506 | /** | |
507 | * mipi_dsi_turn_on_peripheral() - sends a Turn On Peripheral command | |
508 | * @dsi: DSI peripheral device | |
509 | * | |
510 | * Return: 0 on success or a negative error code on failure. | |
511 | */ | |
512 | int mipi_dsi_turn_on_peripheral(struct mipi_dsi_device *dsi) | |
513 | { | |
514 | struct mipi_dsi_msg msg = { | |
515 | .channel = dsi->channel, | |
516 | .type = MIPI_DSI_TURN_ON_PERIPHERAL, | |
517 | .tx_buf = (u8 [2]) { 0, 0 }, | |
518 | .tx_len = 2, | |
519 | }; | |
520 | ||
521 | return mipi_dsi_device_transfer(dsi, &msg); | |
522 | } | |
523 | EXPORT_SYMBOL(mipi_dsi_turn_on_peripheral); | |
524 | ||
dbf30b69 YC |
525 | /* |
526 | * mipi_dsi_set_maximum_return_packet_size() - specify the maximum size of the | |
527 | * the payload in a long packet transmitted from the peripheral back to the | |
528 | * host processor | |
529 | * @dsi: DSI peripheral device | |
530 | * @value: the maximum size of the payload | |
531 | * | |
532 | * Return: 0 on success or a negative error code on failure. | |
533 | */ | |
534 | int mipi_dsi_set_maximum_return_packet_size(struct mipi_dsi_device *dsi, | |
535 | u16 value) | |
536 | { | |
537 | u8 tx[2] = { value & 0xff, value >> 8 }; | |
538 | struct mipi_dsi_msg msg = { | |
539 | .channel = dsi->channel, | |
540 | .type = MIPI_DSI_SET_MAXIMUM_RETURN_PACKET_SIZE, | |
541 | .tx_len = sizeof(tx), | |
542 | .tx_buf = tx, | |
543 | }; | |
544 | ||
545 | return mipi_dsi_device_transfer(dsi, &msg); | |
546 | } | |
547 | EXPORT_SYMBOL(mipi_dsi_set_maximum_return_packet_size); | |
548 | ||
550ab848 TR |
549 | /** |
550 | * mipi_dsi_generic_write() - transmit data using a generic write packet | |
551 | * @dsi: DSI peripheral device | |
552 | * @payload: buffer containing the payload | |
553 | * @size: size of payload buffer | |
554 | * | |
555 | * This function will automatically choose the right data type depending on | |
556 | * the payload length. | |
557 | * | |
558 | * Return: The number of bytes transmitted on success or a negative error code | |
559 | * on failure. | |
560 | */ | |
561 | ssize_t mipi_dsi_generic_write(struct mipi_dsi_device *dsi, const void *payload, | |
562 | size_t size) | |
563 | { | |
564 | struct mipi_dsi_msg msg = { | |
565 | .channel = dsi->channel, | |
566 | .tx_buf = payload, | |
567 | .tx_len = size | |
568 | }; | |
569 | ||
570 | switch (size) { | |
571 | case 0: | |
572 | msg.type = MIPI_DSI_GENERIC_SHORT_WRITE_0_PARAM; | |
573 | break; | |
574 | ||
575 | case 1: | |
576 | msg.type = MIPI_DSI_GENERIC_SHORT_WRITE_1_PARAM; | |
577 | break; | |
578 | ||
579 | case 2: | |
580 | msg.type = MIPI_DSI_GENERIC_SHORT_WRITE_2_PARAM; | |
581 | break; | |
582 | ||
583 | default: | |
584 | msg.type = MIPI_DSI_GENERIC_LONG_WRITE; | |
585 | break; | |
586 | } | |
587 | ||
588 | return mipi_dsi_device_transfer(dsi, &msg); | |
589 | } | |
590 | EXPORT_SYMBOL(mipi_dsi_generic_write); | |
591 | ||
592 | /** | |
593 | * mipi_dsi_generic_read() - receive data using a generic read packet | |
594 | * @dsi: DSI peripheral device | |
595 | * @params: buffer containing the request parameters | |
596 | * @num_params: number of request parameters | |
597 | * @data: buffer in which to return the received data | |
598 | * @size: size of receive buffer | |
599 | * | |
600 | * This function will automatically choose the right data type depending on | |
601 | * the number of parameters passed in. | |
602 | * | |
603 | * Return: The number of bytes successfully read or a negative error code on | |
604 | * failure. | |
605 | */ | |
606 | ssize_t mipi_dsi_generic_read(struct mipi_dsi_device *dsi, const void *params, | |
607 | size_t num_params, void *data, size_t size) | |
608 | { | |
609 | struct mipi_dsi_msg msg = { | |
610 | .channel = dsi->channel, | |
611 | .tx_len = num_params, | |
612 | .tx_buf = params, | |
613 | .rx_len = size, | |
614 | .rx_buf = data | |
615 | }; | |
616 | ||
617 | switch (num_params) { | |
618 | case 0: | |
619 | msg.type = MIPI_DSI_GENERIC_READ_REQUEST_0_PARAM; | |
620 | break; | |
621 | ||
622 | case 1: | |
623 | msg.type = MIPI_DSI_GENERIC_READ_REQUEST_1_PARAM; | |
624 | break; | |
625 | ||
626 | case 2: | |
627 | msg.type = MIPI_DSI_GENERIC_READ_REQUEST_2_PARAM; | |
628 | break; | |
629 | ||
630 | default: | |
631 | return -EINVAL; | |
632 | } | |
633 | ||
634 | return mipi_dsi_device_transfer(dsi, &msg); | |
635 | } | |
636 | EXPORT_SYMBOL(mipi_dsi_generic_read); | |
637 | ||
068a0023 | 638 | /** |
960dd616 TR |
639 | * mipi_dsi_dcs_write_buffer() - transmit a DCS command with payload |
640 | * @dsi: DSI peripheral device | |
641 | * @data: buffer containing data to be transmitted | |
642 | * @len: size of transmission buffer | |
643 | * | |
644 | * This function will automatically choose the right data type depending on | |
645 | * the command payload length. | |
646 | * | |
647 | * Return: The number of bytes successfully transmitted or a negative error | |
648 | * code on failure. | |
068a0023 | 649 | */ |
960dd616 TR |
650 | ssize_t mipi_dsi_dcs_write_buffer(struct mipi_dsi_device *dsi, |
651 | const void *data, size_t len) | |
068a0023 | 652 | { |
068a0023 | 653 | struct mipi_dsi_msg msg = { |
3c523d7d | 654 | .channel = dsi->channel, |
068a0023 AH |
655 | .tx_buf = data, |
656 | .tx_len = len | |
657 | }; | |
658 | ||
068a0023 AH |
659 | switch (len) { |
660 | case 0: | |
661 | return -EINVAL; | |
960dd616 | 662 | |
068a0023 AH |
663 | case 1: |
664 | msg.type = MIPI_DSI_DCS_SHORT_WRITE; | |
665 | break; | |
960dd616 | 666 | |
068a0023 AH |
667 | case 2: |
668 | msg.type = MIPI_DSI_DCS_SHORT_WRITE_PARAM; | |
669 | break; | |
960dd616 | 670 | |
068a0023 AH |
671 | default: |
672 | msg.type = MIPI_DSI_DCS_LONG_WRITE; | |
673 | break; | |
674 | } | |
675 | ||
9eb491f3 | 676 | return mipi_dsi_device_transfer(dsi, &msg); |
068a0023 | 677 | } |
960dd616 TR |
678 | EXPORT_SYMBOL(mipi_dsi_dcs_write_buffer); |
679 | ||
680 | /** | |
681 | * mipi_dsi_dcs_write() - send DCS write command | |
682 | * @dsi: DSI peripheral device | |
683 | * @cmd: DCS command | |
684 | * @data: buffer containing the command payload | |
685 | * @len: command payload length | |
686 | * | |
687 | * This function will automatically choose the right data type depending on | |
688 | * the command payload length. | |
689 | * | |
690 | * Return: The number of bytes successfully transmitted or a negative error | |
691 | * code on failure. | |
692 | */ | |
693 | ssize_t mipi_dsi_dcs_write(struct mipi_dsi_device *dsi, u8 cmd, | |
694 | const void *data, size_t len) | |
695 | { | |
696 | ssize_t err; | |
697 | size_t size; | |
698 | u8 *tx; | |
699 | ||
700 | if (len > 0) { | |
701 | size = 1 + len; | |
702 | ||
703 | tx = kmalloc(size, GFP_KERNEL); | |
704 | if (!tx) | |
705 | return -ENOMEM; | |
706 | ||
707 | /* concatenate the DCS command byte and the payload */ | |
708 | tx[0] = cmd; | |
709 | memcpy(&tx[1], data, len); | |
710 | } else { | |
711 | tx = &cmd; | |
712 | size = 1; | |
713 | } | |
714 | ||
715 | err = mipi_dsi_dcs_write_buffer(dsi, tx, size); | |
716 | ||
717 | if (len > 0) | |
718 | kfree(tx); | |
719 | ||
720 | return err; | |
721 | } | |
068a0023 AH |
722 | EXPORT_SYMBOL(mipi_dsi_dcs_write); |
723 | ||
724 | /** | |
960dd616 TR |
725 | * mipi_dsi_dcs_read() - send DCS read request command |
726 | * @dsi: DSI peripheral device | |
727 | * @cmd: DCS command | |
728 | * @data: buffer in which to receive data | |
729 | * @len: size of receive buffer | |
068a0023 | 730 | * |
960dd616 | 731 | * Return: The number of bytes read or a negative error code on failure. |
068a0023 | 732 | */ |
3c523d7d TR |
733 | ssize_t mipi_dsi_dcs_read(struct mipi_dsi_device *dsi, u8 cmd, void *data, |
734 | size_t len) | |
068a0023 | 735 | { |
068a0023 | 736 | struct mipi_dsi_msg msg = { |
3c523d7d | 737 | .channel = dsi->channel, |
068a0023 AH |
738 | .type = MIPI_DSI_DCS_READ, |
739 | .tx_buf = &cmd, | |
740 | .tx_len = 1, | |
741 | .rx_buf = data, | |
742 | .rx_len = len | |
743 | }; | |
744 | ||
9eb491f3 | 745 | return mipi_dsi_device_transfer(dsi, &msg); |
068a0023 AH |
746 | } |
747 | EXPORT_SYMBOL(mipi_dsi_dcs_read); | |
748 | ||
083d573f TR |
749 | /** |
750 | * mipi_dsi_dcs_nop() - send DCS nop packet | |
751 | * @dsi: DSI peripheral device | |
752 | * | |
753 | * Return: 0 on success or a negative error code on failure. | |
754 | */ | |
755 | int mipi_dsi_dcs_nop(struct mipi_dsi_device *dsi) | |
756 | { | |
757 | ssize_t err; | |
758 | ||
759 | err = mipi_dsi_dcs_write(dsi, MIPI_DCS_NOP, NULL, 0); | |
760 | if (err < 0) | |
761 | return err; | |
762 | ||
763 | return 0; | |
764 | } | |
765 | EXPORT_SYMBOL(mipi_dsi_dcs_nop); | |
766 | ||
2f16b897 TR |
767 | /** |
768 | * mipi_dsi_dcs_soft_reset() - perform a software reset of the display module | |
769 | * @dsi: DSI peripheral device | |
770 | * | |
771 | * Return: 0 on success or a negative error code on failure. | |
772 | */ | |
773 | int mipi_dsi_dcs_soft_reset(struct mipi_dsi_device *dsi) | |
774 | { | |
775 | ssize_t err; | |
776 | ||
777 | err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SOFT_RESET, NULL, 0); | |
778 | if (err < 0) | |
779 | return err; | |
780 | ||
781 | return 0; | |
782 | } | |
783 | EXPORT_SYMBOL(mipi_dsi_dcs_soft_reset); | |
784 | ||
3d9a8fcf TR |
785 | /** |
786 | * mipi_dsi_dcs_get_power_mode() - query the display module's current power | |
787 | * mode | |
788 | * @dsi: DSI peripheral device | |
789 | * @mode: return location for the current power mode | |
790 | * | |
791 | * Return: 0 on success or a negative error code on failure. | |
792 | */ | |
793 | int mipi_dsi_dcs_get_power_mode(struct mipi_dsi_device *dsi, u8 *mode) | |
794 | { | |
795 | ssize_t err; | |
796 | ||
797 | err = mipi_dsi_dcs_read(dsi, MIPI_DCS_GET_POWER_MODE, mode, | |
798 | sizeof(*mode)); | |
799 | if (err <= 0) { | |
800 | if (err == 0) | |
801 | err = -ENODATA; | |
802 | ||
803 | return err; | |
804 | } | |
805 | ||
806 | return 0; | |
807 | } | |
808 | EXPORT_SYMBOL(mipi_dsi_dcs_get_power_mode); | |
809 | ||
5cc0af16 TR |
810 | /** |
811 | * mipi_dsi_dcs_get_pixel_format() - gets the pixel format for the RGB image | |
812 | * data used by the interface | |
813 | * @dsi: DSI peripheral device | |
814 | * @format: return location for the pixel format | |
815 | * | |
816 | * Return: 0 on success or a negative error code on failure. | |
817 | */ | |
818 | int mipi_dsi_dcs_get_pixel_format(struct mipi_dsi_device *dsi, u8 *format) | |
819 | { | |
820 | ssize_t err; | |
821 | ||
822 | err = mipi_dsi_dcs_read(dsi, MIPI_DCS_GET_PIXEL_FORMAT, format, | |
823 | sizeof(*format)); | |
824 | if (err <= 0) { | |
825 | if (err == 0) | |
826 | err = -ENODATA; | |
827 | ||
828 | return err; | |
829 | } | |
830 | ||
831 | return 0; | |
832 | } | |
833 | EXPORT_SYMBOL(mipi_dsi_dcs_get_pixel_format); | |
834 | ||
42fe1e75 YC |
835 | /** |
836 | * mipi_dsi_dcs_enter_sleep_mode() - disable all unnecessary blocks inside the | |
837 | * display module except interface communication | |
838 | * @dsi: DSI peripheral device | |
839 | * | |
840 | * Return: 0 on success or a negative error code on failure. | |
841 | */ | |
842 | int mipi_dsi_dcs_enter_sleep_mode(struct mipi_dsi_device *dsi) | |
843 | { | |
844 | ssize_t err; | |
845 | ||
846 | err = mipi_dsi_dcs_write(dsi, MIPI_DCS_ENTER_SLEEP_MODE, NULL, 0); | |
847 | if (err < 0) | |
848 | return err; | |
849 | ||
850 | return 0; | |
851 | } | |
852 | EXPORT_SYMBOL(mipi_dsi_dcs_enter_sleep_mode); | |
853 | ||
854 | /** | |
855 | * mipi_dsi_dcs_exit_sleep_mode() - enable all blocks inside the display | |
856 | * module | |
857 | * @dsi: DSI peripheral device | |
858 | * | |
859 | * Return: 0 on success or a negative error code on failure. | |
860 | */ | |
861 | int mipi_dsi_dcs_exit_sleep_mode(struct mipi_dsi_device *dsi) | |
862 | { | |
863 | ssize_t err; | |
864 | ||
865 | err = mipi_dsi_dcs_write(dsi, MIPI_DCS_EXIT_SLEEP_MODE, NULL, 0); | |
866 | if (err < 0) | |
867 | return err; | |
868 | ||
869 | return 0; | |
870 | } | |
871 | EXPORT_SYMBOL(mipi_dsi_dcs_exit_sleep_mode); | |
872 | ||
873 | /** | |
874 | * mipi_dsi_dcs_set_display_off() - stop displaying the image data on the | |
875 | * display device | |
876 | * @dsi: DSI peripheral device | |
877 | * | |
878 | * Return: 0 on success or a negative error code on failure. | |
879 | */ | |
880 | int mipi_dsi_dcs_set_display_off(struct mipi_dsi_device *dsi) | |
881 | { | |
882 | ssize_t err; | |
883 | ||
884 | err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_DISPLAY_OFF, NULL, 0); | |
885 | if (err < 0) | |
886 | return err; | |
887 | ||
888 | return 0; | |
889 | } | |
890 | EXPORT_SYMBOL(mipi_dsi_dcs_set_display_off); | |
891 | ||
892 | /** | |
893 | * mipi_dsi_dcs_set_display_on() - start displaying the image data on the | |
894 | * display device | |
895 | * @dsi: DSI peripheral device | |
896 | * | |
897 | * Return: 0 on success or a negative error code on failure | |
898 | */ | |
899 | int mipi_dsi_dcs_set_display_on(struct mipi_dsi_device *dsi) | |
900 | { | |
901 | ssize_t err; | |
902 | ||
903 | err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_DISPLAY_ON, NULL, 0); | |
904 | if (err < 0) | |
905 | return err; | |
906 | ||
907 | return 0; | |
908 | } | |
909 | EXPORT_SYMBOL(mipi_dsi_dcs_set_display_on); | |
910 | ||
3b46d4a0 TR |
911 | /** |
912 | * mipi_dsi_dcs_set_column_address() - define the column extent of the frame | |
913 | * memory accessed by the host processor | |
914 | * @dsi: DSI peripheral device | |
915 | * @start: first column of frame memory | |
916 | * @end: last column of frame memory | |
917 | * | |
918 | * Return: 0 on success or a negative error code on failure. | |
919 | */ | |
920 | int mipi_dsi_dcs_set_column_address(struct mipi_dsi_device *dsi, u16 start, | |
921 | u16 end) | |
922 | { | |
923 | u8 payload[4] = { start >> 8, start & 0xff, end >> 8, end & 0xff }; | |
924 | ssize_t err; | |
925 | ||
926 | err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_COLUMN_ADDRESS, payload, | |
927 | sizeof(payload)); | |
928 | if (err < 0) | |
929 | return err; | |
930 | ||
931 | return 0; | |
932 | } | |
933 | EXPORT_SYMBOL(mipi_dsi_dcs_set_column_address); | |
934 | ||
935 | /** | |
936 | * mipi_dsi_dcs_set_page_address() - define the page extent of the frame | |
937 | * memory accessed by the host processor | |
938 | * @dsi: DSI peripheral device | |
939 | * @start: first page of frame memory | |
940 | * @end: last page of frame memory | |
941 | * | |
942 | * Return: 0 on success or a negative error code on failure. | |
943 | */ | |
944 | int mipi_dsi_dcs_set_page_address(struct mipi_dsi_device *dsi, u16 start, | |
945 | u16 end) | |
946 | { | |
947 | u8 payload[4] = { start >> 8, start & 0xff, end >> 8, end & 0xff }; | |
948 | ssize_t err; | |
949 | ||
950 | err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_PAGE_ADDRESS, payload, | |
951 | sizeof(payload)); | |
952 | if (err < 0) | |
953 | return err; | |
954 | ||
955 | return 0; | |
956 | } | |
957 | EXPORT_SYMBOL(mipi_dsi_dcs_set_page_address); | |
958 | ||
42fe1e75 YC |
959 | /** |
960 | * mipi_dsi_dcs_set_tear_off() - turn off the display module's Tearing Effect | |
961 | * output signal on the TE signal line | |
962 | * @dsi: DSI peripheral device | |
963 | * | |
964 | * Return: 0 on success or a negative error code on failure | |
965 | */ | |
966 | int mipi_dsi_dcs_set_tear_off(struct mipi_dsi_device *dsi) | |
967 | { | |
968 | ssize_t err; | |
969 | ||
970 | err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_TEAR_OFF, NULL, 0); | |
971 | if (err < 0) | |
972 | return err; | |
973 | ||
974 | return 0; | |
975 | } | |
976 | EXPORT_SYMBOL(mipi_dsi_dcs_set_tear_off); | |
977 | ||
978 | /** | |
979 | * mipi_dsi_dcs_set_tear_on() - turn on the display module's Tearing Effect | |
980 | * output signal on the TE signal line. | |
981 | * @dsi: DSI peripheral device | |
982 | * @mode: the Tearing Effect Output Line mode | |
983 | * | |
984 | * Return: 0 on success or a negative error code on failure | |
985 | */ | |
986 | int mipi_dsi_dcs_set_tear_on(struct mipi_dsi_device *dsi, | |
987 | enum mipi_dsi_dcs_tear_mode mode) | |
988 | { | |
989 | u8 value = mode; | |
990 | ssize_t err; | |
991 | ||
992 | err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_TEAR_ON, &value, | |
993 | sizeof(value)); | |
994 | if (err < 0) | |
995 | return err; | |
996 | ||
997 | return 0; | |
998 | } | |
999 | EXPORT_SYMBOL(mipi_dsi_dcs_set_tear_on); | |
1000 | ||
e8395081 | 1001 | /** |
bbdcf516 TR |
1002 | * mipi_dsi_dcs_set_pixel_format() - sets the pixel format for the RGB image |
1003 | * data used by the interface | |
e8395081 | 1004 | * @dsi: DSI peripheral device |
bbdcf516 | 1005 | * @format: pixel format |
6308c983 | 1006 | * |
bbdcf516 | 1007 | * Return: 0 on success or a negative error code on failure. |
e8395081 | 1008 | */ |
bbdcf516 | 1009 | int mipi_dsi_dcs_set_pixel_format(struct mipi_dsi_device *dsi, u8 format) |
e8395081 | 1010 | { |
e8395081 VSB |
1011 | ssize_t err; |
1012 | ||
bbdcf516 TR |
1013 | err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_PIXEL_FORMAT, &format, |
1014 | sizeof(format)); | |
e8395081 VSB |
1015 | if (err < 0) |
1016 | return err; | |
1017 | ||
1018 | return 0; | |
1019 | } | |
bbdcf516 | 1020 | EXPORT_SYMBOL(mipi_dsi_dcs_set_pixel_format); |
e8395081 | 1021 | |
5cc0af16 | 1022 | /** |
bbdcf516 TR |
1023 | * mipi_dsi_dcs_set_tear_scanline() - set the scanline to use as trigger for |
1024 | * the Tearing Effect output signal of the display module | |
5cc0af16 | 1025 | * @dsi: DSI peripheral device |
bbdcf516 | 1026 | * @scanline: scanline to use as trigger |
5cc0af16 | 1027 | * |
bbdcf516 | 1028 | * Return: 0 on success or a negative error code on failure |
5cc0af16 | 1029 | */ |
bbdcf516 | 1030 | int mipi_dsi_dcs_set_tear_scanline(struct mipi_dsi_device *dsi, u16 scanline) |
5cc0af16 | 1031 | { |
bbdcf516 TR |
1032 | u8 payload[3] = { MIPI_DCS_SET_TEAR_SCANLINE, scanline >> 8, |
1033 | scanline & 0xff }; | |
5cc0af16 TR |
1034 | ssize_t err; |
1035 | ||
bbdcf516 | 1036 | err = mipi_dsi_generic_write(dsi, payload, sizeof(payload)); |
5cc0af16 TR |
1037 | if (err < 0) |
1038 | return err; | |
1039 | ||
1040 | return 0; | |
1041 | } | |
bbdcf516 | 1042 | EXPORT_SYMBOL(mipi_dsi_dcs_set_tear_scanline); |
5cc0af16 | 1043 | |
1a9d7593 VSB |
1044 | /** |
1045 | * mipi_dsi_dcs_set_display_brightness() - sets the brightness value of the | |
1046 | * display | |
1047 | * @dsi: DSI peripheral device | |
1048 | * @brightness: brightness value | |
1049 | * | |
1050 | * Return: 0 on success or a negative error code on failure. | |
1051 | */ | |
1052 | int mipi_dsi_dcs_set_display_brightness(struct mipi_dsi_device *dsi, | |
1053 | u16 brightness) | |
1054 | { | |
1055 | u8 payload[2] = { brightness & 0xff, brightness >> 8 }; | |
1056 | ssize_t err; | |
1057 | ||
1058 | err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_DISPLAY_BRIGHTNESS, | |
1059 | payload, sizeof(payload)); | |
1060 | if (err < 0) | |
1061 | return err; | |
1062 | ||
1063 | return 0; | |
1064 | } | |
1065 | EXPORT_SYMBOL(mipi_dsi_dcs_set_display_brightness); | |
1066 | ||
1067 | /** | |
1068 | * mipi_dsi_dcs_get_display_brightness() - gets the current brightness value | |
1069 | * of the display | |
1070 | * @dsi: DSI peripheral device | |
1071 | * @brightness: brightness value | |
1072 | * | |
1073 | * Return: 0 on success or a negative error code on failure. | |
1074 | */ | |
1075 | int mipi_dsi_dcs_get_display_brightness(struct mipi_dsi_device *dsi, | |
1076 | u16 *brightness) | |
1077 | { | |
1078 | ssize_t err; | |
1079 | ||
1080 | err = mipi_dsi_dcs_read(dsi, MIPI_DCS_GET_DISPLAY_BRIGHTNESS, | |
1081 | brightness, sizeof(*brightness)); | |
1082 | if (err <= 0) { | |
1083 | if (err == 0) | |
1084 | err = -ENODATA; | |
1085 | ||
1086 | return err; | |
1087 | } | |
1088 | ||
1089 | return 0; | |
1090 | } | |
1091 | EXPORT_SYMBOL(mipi_dsi_dcs_get_display_brightness); | |
1092 | ||
068a0023 AH |
1093 | static int mipi_dsi_drv_probe(struct device *dev) |
1094 | { | |
1095 | struct mipi_dsi_driver *drv = to_mipi_dsi_driver(dev->driver); | |
1096 | struct mipi_dsi_device *dsi = to_mipi_dsi_device(dev); | |
1097 | ||
1098 | return drv->probe(dsi); | |
1099 | } | |
1100 | ||
1101 | static int mipi_dsi_drv_remove(struct device *dev) | |
1102 | { | |
1103 | struct mipi_dsi_driver *drv = to_mipi_dsi_driver(dev->driver); | |
1104 | struct mipi_dsi_device *dsi = to_mipi_dsi_device(dev); | |
1105 | ||
1106 | return drv->remove(dsi); | |
1107 | } | |
1108 | ||
d1621803 TR |
1109 | static void mipi_dsi_drv_shutdown(struct device *dev) |
1110 | { | |
1111 | struct mipi_dsi_driver *drv = to_mipi_dsi_driver(dev->driver); | |
1112 | struct mipi_dsi_device *dsi = to_mipi_dsi_device(dev); | |
1113 | ||
1114 | drv->shutdown(dsi); | |
1115 | } | |
1116 | ||
068a0023 | 1117 | /** |
99035e99 | 1118 | * mipi_dsi_driver_register_full() - register a driver for DSI devices |
068a0023 | 1119 | * @drv: DSI driver structure |
99035e99 | 1120 | * @owner: owner module |
009081e0 TR |
1121 | * |
1122 | * Return: 0 on success or a negative error code on failure. | |
068a0023 | 1123 | */ |
99035e99 TR |
1124 | int mipi_dsi_driver_register_full(struct mipi_dsi_driver *drv, |
1125 | struct module *owner) | |
068a0023 AH |
1126 | { |
1127 | drv->driver.bus = &mipi_dsi_bus_type; | |
99035e99 TR |
1128 | drv->driver.owner = owner; |
1129 | ||
068a0023 AH |
1130 | if (drv->probe) |
1131 | drv->driver.probe = mipi_dsi_drv_probe; | |
1132 | if (drv->remove) | |
1133 | drv->driver.remove = mipi_dsi_drv_remove; | |
d1621803 TR |
1134 | if (drv->shutdown) |
1135 | drv->driver.shutdown = mipi_dsi_drv_shutdown; | |
068a0023 AH |
1136 | |
1137 | return driver_register(&drv->driver); | |
1138 | } | |
99035e99 | 1139 | EXPORT_SYMBOL(mipi_dsi_driver_register_full); |
068a0023 AH |
1140 | |
1141 | /** | |
009081e0 | 1142 | * mipi_dsi_driver_unregister() - unregister a driver for DSI devices |
068a0023 | 1143 | * @drv: DSI driver structure |
009081e0 TR |
1144 | * |
1145 | * Return: 0 on success or a negative error code on failure. | |
068a0023 AH |
1146 | */ |
1147 | void mipi_dsi_driver_unregister(struct mipi_dsi_driver *drv) | |
1148 | { | |
1149 | driver_unregister(&drv->driver); | |
1150 | } | |
1151 | EXPORT_SYMBOL(mipi_dsi_driver_unregister); | |
1152 | ||
1153 | static int __init mipi_dsi_bus_init(void) | |
1154 | { | |
1155 | return bus_register(&mipi_dsi_bus_type); | |
1156 | } | |
1157 | postcore_initcall(mipi_dsi_bus_init); | |
1158 | ||
1159 | MODULE_AUTHOR("Andrzej Hajda <a.hajda@samsung.com>"); | |
1160 | MODULE_DESCRIPTION("MIPI DSI Bus"); | |
1161 | MODULE_LICENSE("GPL and additional rights"); |