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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 | ||
f4dea1aa | 36 | #include <drm/drm_dsc.h> |
1040e424 | 37 | #include <drm/drm_print.h> |
068a0023 AH |
38 | #include <video/mipi_display.h> |
39 | ||
009081e0 TR |
40 | /** |
41 | * DOC: dsi helpers | |
42 | * | |
43 | * These functions contain some common logic and helpers to deal with MIPI DSI | |
44 | * peripherals. | |
45 | * | |
46 | * Helpers are provided for a number of standard MIPI DSI command as well as a | |
47 | * subset of the MIPI DCS command set. | |
48 | */ | |
49 | ||
068a0023 AH |
50 | static int mipi_dsi_device_match(struct device *dev, struct device_driver *drv) |
51 | { | |
bf4363ce AT |
52 | struct mipi_dsi_device *dsi = to_mipi_dsi_device(dev); |
53 | ||
54 | /* attempt OF style match */ | |
55 | if (of_driver_match_device(dev, drv)) | |
56 | return 1; | |
57 | ||
58 | /* compare DSI device and driver names */ | |
59 | if (!strcmp(dsi->name, drv->name)) | |
60 | return 1; | |
61 | ||
62 | return 0; | |
068a0023 AH |
63 | } |
64 | ||
babb24fe TR |
65 | static int mipi_dsi_uevent(struct device *dev, struct kobj_uevent_env *env) |
66 | { | |
67 | struct mipi_dsi_device *dsi = to_mipi_dsi_device(dev); | |
68 | int err; | |
69 | ||
70 | err = of_device_uevent_modalias(dev, env); | |
71 | if (err != -ENODEV) | |
72 | return err; | |
73 | ||
74 | add_uevent_var(env, "MODALIAS=%s%s", MIPI_DSI_MODULE_PREFIX, | |
75 | dsi->name); | |
76 | ||
77 | return 0; | |
78 | } | |
79 | ||
068a0023 AH |
80 | static const struct dev_pm_ops mipi_dsi_device_pm_ops = { |
81 | .runtime_suspend = pm_generic_runtime_suspend, | |
82 | .runtime_resume = pm_generic_runtime_resume, | |
83 | .suspend = pm_generic_suspend, | |
84 | .resume = pm_generic_resume, | |
85 | .freeze = pm_generic_freeze, | |
86 | .thaw = pm_generic_thaw, | |
87 | .poweroff = pm_generic_poweroff, | |
88 | .restore = pm_generic_restore, | |
89 | }; | |
90 | ||
91 | static struct bus_type mipi_dsi_bus_type = { | |
92 | .name = "mipi-dsi", | |
93 | .match = mipi_dsi_device_match, | |
babb24fe | 94 | .uevent = mipi_dsi_uevent, |
068a0023 AH |
95 | .pm = &mipi_dsi_device_pm_ops, |
96 | }; | |
97 | ||
3ef05924 TR |
98 | /** |
99 | * of_find_mipi_dsi_device_by_node() - find the MIPI DSI device matching a | |
100 | * device tree node | |
101 | * @np: device tree node | |
102 | * | |
103 | * Return: A pointer to the MIPI DSI device corresponding to @np or NULL if no | |
104 | * such device exists (or has not been registered yet). | |
105 | */ | |
106 | struct mipi_dsi_device *of_find_mipi_dsi_device_by_node(struct device_node *np) | |
107 | { | |
108 | struct device *dev; | |
109 | ||
cfba5de9 | 110 | dev = bus_find_device_by_of_node(&mipi_dsi_bus_type, np); |
3ef05924 TR |
111 | |
112 | return dev ? to_mipi_dsi_device(dev) : NULL; | |
113 | } | |
114 | EXPORT_SYMBOL(of_find_mipi_dsi_device_by_node); | |
115 | ||
068a0023 AH |
116 | static void mipi_dsi_dev_release(struct device *dev) |
117 | { | |
118 | struct mipi_dsi_device *dsi = to_mipi_dsi_device(dev); | |
119 | ||
120 | of_node_put(dev->of_node); | |
121 | kfree(dsi); | |
122 | } | |
123 | ||
124 | static const struct device_type mipi_dsi_device_type = { | |
125 | .release = mipi_dsi_dev_release, | |
126 | }; | |
127 | ||
128 | static struct mipi_dsi_device *mipi_dsi_device_alloc(struct mipi_dsi_host *host) | |
129 | { | |
130 | struct mipi_dsi_device *dsi; | |
131 | ||
132 | dsi = kzalloc(sizeof(*dsi), GFP_KERNEL); | |
133 | if (!dsi) | |
134 | return ERR_PTR(-ENOMEM); | |
135 | ||
136 | dsi->host = host; | |
137 | dsi->dev.bus = &mipi_dsi_bus_type; | |
138 | dsi->dev.parent = host->dev; | |
139 | dsi->dev.type = &mipi_dsi_device_type; | |
140 | ||
141 | device_initialize(&dsi->dev); | |
142 | ||
143 | return dsi; | |
144 | } | |
145 | ||
146 | static int mipi_dsi_device_add(struct mipi_dsi_device *dsi) | |
147 | { | |
148 | struct mipi_dsi_host *host = dsi->host; | |
149 | ||
150 | dev_set_name(&dsi->dev, "%s.%d", dev_name(host->dev), dsi->channel); | |
151 | ||
152 | return device_add(&dsi->dev); | |
153 | } | |
154 | ||
fc903ebd | 155 | #if IS_ENABLED(CONFIG_OF) |
068a0023 AH |
156 | static struct mipi_dsi_device * |
157 | of_mipi_dsi_device_add(struct mipi_dsi_host *host, struct device_node *node) | |
158 | { | |
c63ae8a9 | 159 | struct mipi_dsi_device_info info = { }; |
068a0023 AH |
160 | int ret; |
161 | u32 reg; | |
162 | ||
bf4363ce | 163 | if (of_modalias_node(node, info.type, sizeof(info.type)) < 0) { |
1040e424 | 164 | drm_err(host, "modalias failure on %pOF\n", node); |
bf4363ce AT |
165 | return ERR_PTR(-EINVAL); |
166 | } | |
167 | ||
068a0023 AH |
168 | ret = of_property_read_u32(node, "reg", ®); |
169 | if (ret) { | |
1040e424 | 170 | drm_err(host, "device node %pOF has no valid reg property: %d\n", |
4bf99144 | 171 | node, ret); |
068a0023 AH |
172 | return ERR_PTR(-EINVAL); |
173 | } | |
174 | ||
c63ae8a9 AT |
175 | info.channel = reg; |
176 | info.node = of_node_get(node); | |
177 | ||
178 | return mipi_dsi_device_register_full(host, &info); | |
179 | } | |
180 | #else | |
181 | static struct mipi_dsi_device * | |
182 | of_mipi_dsi_device_add(struct mipi_dsi_host *host, struct device_node *node) | |
183 | { | |
184 | return ERR_PTR(-ENODEV); | |
185 | } | |
186 | #endif | |
187 | ||
188 | /** | |
189 | * mipi_dsi_device_register_full - create a MIPI DSI device | |
190 | * @host: DSI host to which this device is connected | |
191 | * @info: pointer to template containing DSI device information | |
192 | * | |
193 | * Create a MIPI DSI device by using the device information provided by | |
194 | * mipi_dsi_device_info template | |
195 | * | |
196 | * Returns: | |
197 | * A pointer to the newly created MIPI DSI device, or, a pointer encoded | |
198 | * with an error | |
199 | */ | |
200 | struct mipi_dsi_device * | |
201 | mipi_dsi_device_register_full(struct mipi_dsi_host *host, | |
202 | const struct mipi_dsi_device_info *info) | |
203 | { | |
204 | struct mipi_dsi_device *dsi; | |
c63ae8a9 AT |
205 | int ret; |
206 | ||
207 | if (!info) { | |
1040e424 | 208 | drm_err(host, "invalid mipi_dsi_device_info pointer\n"); |
c63ae8a9 AT |
209 | return ERR_PTR(-EINVAL); |
210 | } | |
211 | ||
212 | if (info->channel > 3) { | |
1040e424 | 213 | drm_err(host, "invalid virtual channel: %u\n", info->channel); |
068a0023 AH |
214 | return ERR_PTR(-EINVAL); |
215 | } | |
216 | ||
217 | dsi = mipi_dsi_device_alloc(host); | |
218 | if (IS_ERR(dsi)) { | |
1040e424 | 219 | drm_err(host, "failed to allocate DSI device %ld\n", |
c63ae8a9 | 220 | PTR_ERR(dsi)); |
068a0023 AH |
221 | return dsi; |
222 | } | |
223 | ||
c63ae8a9 AT |
224 | dsi->dev.of_node = info->node; |
225 | dsi->channel = info->channel; | |
bf4363ce | 226 | strlcpy(dsi->name, info->type, sizeof(dsi->name)); |
068a0023 AH |
227 | |
228 | ret = mipi_dsi_device_add(dsi); | |
229 | if (ret) { | |
1040e424 | 230 | drm_err(host, "failed to add DSI device %d\n", ret); |
068a0023 AH |
231 | kfree(dsi); |
232 | return ERR_PTR(ret); | |
233 | } | |
234 | ||
235 | return dsi; | |
236 | } | |
c63ae8a9 | 237 | EXPORT_SYMBOL(mipi_dsi_device_register_full); |
068a0023 | 238 | |
509e42ce AT |
239 | /** |
240 | * mipi_dsi_device_unregister - unregister MIPI DSI device | |
241 | * @dsi: DSI peripheral device | |
242 | */ | |
243 | void mipi_dsi_device_unregister(struct mipi_dsi_device *dsi) | |
244 | { | |
245 | device_unregister(&dsi->dev); | |
246 | } | |
247 | EXPORT_SYMBOL(mipi_dsi_device_unregister); | |
248 | ||
a1419fb4 MR |
249 | static void devm_mipi_dsi_device_unregister(void *arg) |
250 | { | |
251 | struct mipi_dsi_device *dsi = arg; | |
252 | ||
253 | mipi_dsi_device_unregister(dsi); | |
254 | } | |
255 | ||
256 | /** | |
257 | * devm_mipi_dsi_device_register_full - create a managed MIPI DSI device | |
258 | * @dev: device to tie the MIPI-DSI device lifetime to | |
259 | * @host: DSI host to which this device is connected | |
260 | * @info: pointer to template containing DSI device information | |
261 | * | |
262 | * Create a MIPI DSI device by using the device information provided by | |
263 | * mipi_dsi_device_info template | |
264 | * | |
265 | * This is the managed version of mipi_dsi_device_register_full() which | |
266 | * automatically calls mipi_dsi_device_unregister() when @dev is | |
267 | * unbound. | |
268 | * | |
269 | * Returns: | |
270 | * A pointer to the newly created MIPI DSI device, or, a pointer encoded | |
271 | * with an error | |
272 | */ | |
273 | struct mipi_dsi_device * | |
274 | devm_mipi_dsi_device_register_full(struct device *dev, | |
275 | struct mipi_dsi_host *host, | |
276 | const struct mipi_dsi_device_info *info) | |
277 | { | |
278 | struct mipi_dsi_device *dsi; | |
279 | int ret; | |
280 | ||
281 | dsi = mipi_dsi_device_register_full(host, info); | |
282 | if (IS_ERR(dsi)) | |
283 | return dsi; | |
284 | ||
285 | ret = devm_add_action_or_reset(dev, | |
286 | devm_mipi_dsi_device_unregister, | |
287 | dsi); | |
288 | if (ret) | |
289 | return ERR_PTR(ret); | |
290 | ||
291 | return dsi; | |
292 | } | |
293 | EXPORT_SYMBOL_GPL(devm_mipi_dsi_device_register_full); | |
294 | ||
97b6ae50 AT |
295 | static DEFINE_MUTEX(host_lock); |
296 | static LIST_HEAD(host_list); | |
297 | ||
298 | /** | |
299 | * of_find_mipi_dsi_host_by_node() - find the MIPI DSI host matching a | |
300 | * device tree node | |
301 | * @node: device tree node | |
302 | * | |
303 | * Returns: | |
304 | * A pointer to the MIPI DSI host corresponding to @node or NULL if no | |
305 | * such device exists (or has not been registered yet). | |
306 | */ | |
307 | struct mipi_dsi_host *of_find_mipi_dsi_host_by_node(struct device_node *node) | |
308 | { | |
309 | struct mipi_dsi_host *host; | |
310 | ||
311 | mutex_lock(&host_lock); | |
312 | ||
313 | list_for_each_entry(host, &host_list, list) { | |
314 | if (host->dev->of_node == node) { | |
315 | mutex_unlock(&host_lock); | |
316 | return host; | |
317 | } | |
318 | } | |
319 | ||
320 | mutex_unlock(&host_lock); | |
321 | ||
322 | return NULL; | |
323 | } | |
324 | EXPORT_SYMBOL(of_find_mipi_dsi_host_by_node); | |
325 | ||
068a0023 AH |
326 | int mipi_dsi_host_register(struct mipi_dsi_host *host) |
327 | { | |
328 | struct device_node *node; | |
329 | ||
e49640da AH |
330 | for_each_available_child_of_node(host->dev->of_node, node) { |
331 | /* skip nodes without reg property */ | |
332 | if (!of_find_property(node, "reg", NULL)) | |
333 | continue; | |
068a0023 | 334 | of_mipi_dsi_device_add(host, node); |
e49640da | 335 | } |
068a0023 | 336 | |
97b6ae50 AT |
337 | mutex_lock(&host_lock); |
338 | list_add_tail(&host->list, &host_list); | |
339 | mutex_unlock(&host_lock); | |
340 | ||
068a0023 AH |
341 | return 0; |
342 | } | |
343 | EXPORT_SYMBOL(mipi_dsi_host_register); | |
344 | ||
345 | static int mipi_dsi_remove_device_fn(struct device *dev, void *priv) | |
346 | { | |
347 | struct mipi_dsi_device *dsi = to_mipi_dsi_device(dev); | |
348 | ||
509e42ce | 349 | mipi_dsi_device_unregister(dsi); |
068a0023 AH |
350 | |
351 | return 0; | |
352 | } | |
353 | ||
354 | void mipi_dsi_host_unregister(struct mipi_dsi_host *host) | |
355 | { | |
356 | device_for_each_child(host->dev, NULL, mipi_dsi_remove_device_fn); | |
97b6ae50 AT |
357 | |
358 | mutex_lock(&host_lock); | |
359 | list_del_init(&host->list); | |
360 | mutex_unlock(&host_lock); | |
068a0023 AH |
361 | } |
362 | EXPORT_SYMBOL(mipi_dsi_host_unregister); | |
363 | ||
364 | /** | |
365 | * mipi_dsi_attach - attach a DSI device to its DSI host | |
366 | * @dsi: DSI peripheral | |
367 | */ | |
368 | int mipi_dsi_attach(struct mipi_dsi_device *dsi) | |
369 | { | |
370 | const struct mipi_dsi_host_ops *ops = dsi->host->ops; | |
371 | ||
372 | if (!ops || !ops->attach) | |
373 | return -ENOSYS; | |
374 | ||
375 | return ops->attach(dsi->host, dsi); | |
376 | } | |
377 | EXPORT_SYMBOL(mipi_dsi_attach); | |
378 | ||
379 | /** | |
380 | * mipi_dsi_detach - detach a DSI device from its DSI host | |
381 | * @dsi: DSI peripheral | |
382 | */ | |
383 | int mipi_dsi_detach(struct mipi_dsi_device *dsi) | |
384 | { | |
385 | const struct mipi_dsi_host_ops *ops = dsi->host->ops; | |
386 | ||
387 | if (!ops || !ops->detach) | |
388 | return -ENOSYS; | |
389 | ||
390 | return ops->detach(dsi->host, dsi); | |
391 | } | |
392 | EXPORT_SYMBOL(mipi_dsi_detach); | |
393 | ||
db656849 MR |
394 | static void devm_mipi_dsi_detach(void *arg) |
395 | { | |
396 | struct mipi_dsi_device *dsi = arg; | |
397 | ||
398 | mipi_dsi_detach(dsi); | |
399 | } | |
400 | ||
401 | /** | |
402 | * devm_mipi_dsi_attach - Attach a MIPI-DSI device to its DSI Host | |
403 | * @dev: device to tie the MIPI-DSI device attachment lifetime to | |
404 | * @dsi: DSI peripheral | |
405 | * | |
406 | * This is the managed version of mipi_dsi_attach() which automatically | |
407 | * calls mipi_dsi_detach() when @dev is unbound. | |
408 | * | |
409 | * Returns: | |
410 | * 0 on success, a negative error code on failure. | |
411 | */ | |
412 | int devm_mipi_dsi_attach(struct device *dev, | |
413 | struct mipi_dsi_device *dsi) | |
414 | { | |
415 | int ret; | |
416 | ||
417 | ret = mipi_dsi_attach(dsi); | |
418 | if (ret) | |
419 | return ret; | |
420 | ||
421 | ret = devm_add_action_or_reset(dev, devm_mipi_dsi_detach, dsi); | |
422 | if (ret) | |
423 | return ret; | |
424 | ||
425 | return 0; | |
426 | } | |
427 | EXPORT_SYMBOL_GPL(devm_mipi_dsi_attach); | |
428 | ||
9eb491f3 TR |
429 | static ssize_t mipi_dsi_device_transfer(struct mipi_dsi_device *dsi, |
430 | struct mipi_dsi_msg *msg) | |
431 | { | |
432 | const struct mipi_dsi_host_ops *ops = dsi->host->ops; | |
433 | ||
434 | if (!ops || !ops->transfer) | |
435 | return -ENOSYS; | |
436 | ||
437 | if (dsi->mode_flags & MIPI_DSI_MODE_LPM) | |
438 | msg->flags |= MIPI_DSI_MSG_USE_LPM; | |
439 | ||
440 | return ops->transfer(dsi->host, msg); | |
441 | } | |
442 | ||
02acb76d TR |
443 | /** |
444 | * mipi_dsi_packet_format_is_short - check if a packet is of the short format | |
445 | * @type: MIPI DSI data type of the packet | |
446 | * | |
447 | * Return: true if the packet for the given data type is a short packet, false | |
448 | * otherwise. | |
449 | */ | |
450 | bool mipi_dsi_packet_format_is_short(u8 type) | |
451 | { | |
452 | switch (type) { | |
453 | case MIPI_DSI_V_SYNC_START: | |
454 | case MIPI_DSI_V_SYNC_END: | |
455 | case MIPI_DSI_H_SYNC_START: | |
456 | case MIPI_DSI_H_SYNC_END: | |
e85c6592 | 457 | case MIPI_DSI_COMPRESSION_MODE: |
02acb76d TR |
458 | case MIPI_DSI_END_OF_TRANSMISSION: |
459 | case MIPI_DSI_COLOR_MODE_OFF: | |
460 | case MIPI_DSI_COLOR_MODE_ON: | |
461 | case MIPI_DSI_SHUTDOWN_PERIPHERAL: | |
462 | case MIPI_DSI_TURN_ON_PERIPHERAL: | |
463 | case MIPI_DSI_GENERIC_SHORT_WRITE_0_PARAM: | |
464 | case MIPI_DSI_GENERIC_SHORT_WRITE_1_PARAM: | |
465 | case MIPI_DSI_GENERIC_SHORT_WRITE_2_PARAM: | |
466 | case MIPI_DSI_GENERIC_READ_REQUEST_0_PARAM: | |
467 | case MIPI_DSI_GENERIC_READ_REQUEST_1_PARAM: | |
468 | case MIPI_DSI_GENERIC_READ_REQUEST_2_PARAM: | |
469 | case MIPI_DSI_DCS_SHORT_WRITE: | |
470 | case MIPI_DSI_DCS_SHORT_WRITE_PARAM: | |
471 | case MIPI_DSI_DCS_READ: | |
55863635 | 472 | case MIPI_DSI_EXECUTE_QUEUE: |
02acb76d TR |
473 | case MIPI_DSI_SET_MAXIMUM_RETURN_PACKET_SIZE: |
474 | return true; | |
475 | } | |
476 | ||
477 | return false; | |
478 | } | |
479 | EXPORT_SYMBOL(mipi_dsi_packet_format_is_short); | |
480 | ||
481 | /** | |
482 | * mipi_dsi_packet_format_is_long - check if a packet is of the long format | |
483 | * @type: MIPI DSI data type of the packet | |
484 | * | |
485 | * Return: true if the packet for the given data type is a long packet, false | |
486 | * otherwise. | |
487 | */ | |
488 | bool mipi_dsi_packet_format_is_long(u8 type) | |
489 | { | |
490 | switch (type) { | |
491 | case MIPI_DSI_NULL_PACKET: | |
492 | case MIPI_DSI_BLANKING_PACKET: | |
493 | case MIPI_DSI_GENERIC_LONG_WRITE: | |
494 | case MIPI_DSI_DCS_LONG_WRITE: | |
e85c6592 | 495 | case MIPI_DSI_PICTURE_PARAMETER_SET: |
55863635 | 496 | case MIPI_DSI_COMPRESSED_PIXEL_STREAM: |
02acb76d TR |
497 | case MIPI_DSI_LOOSELY_PACKED_PIXEL_STREAM_YCBCR20: |
498 | case MIPI_DSI_PACKED_PIXEL_STREAM_YCBCR24: | |
499 | case MIPI_DSI_PACKED_PIXEL_STREAM_YCBCR16: | |
500 | case MIPI_DSI_PACKED_PIXEL_STREAM_30: | |
501 | case MIPI_DSI_PACKED_PIXEL_STREAM_36: | |
502 | case MIPI_DSI_PACKED_PIXEL_STREAM_YCBCR12: | |
503 | case MIPI_DSI_PACKED_PIXEL_STREAM_16: | |
504 | case MIPI_DSI_PACKED_PIXEL_STREAM_18: | |
505 | case MIPI_DSI_PIXEL_STREAM_3BYTE_18: | |
506 | case MIPI_DSI_PACKED_PIXEL_STREAM_24: | |
507 | return true; | |
508 | } | |
509 | ||
510 | return false; | |
511 | } | |
512 | EXPORT_SYMBOL(mipi_dsi_packet_format_is_long); | |
513 | ||
a52879e8 TR |
514 | /** |
515 | * mipi_dsi_create_packet - create a packet from a message according to the | |
516 | * DSI protocol | |
517 | * @packet: pointer to a DSI packet structure | |
518 | * @msg: message to translate into a packet | |
519 | * | |
520 | * Return: 0 on success or a negative error code on failure. | |
521 | */ | |
522 | int mipi_dsi_create_packet(struct mipi_dsi_packet *packet, | |
523 | const struct mipi_dsi_msg *msg) | |
524 | { | |
a52879e8 TR |
525 | if (!packet || !msg) |
526 | return -EINVAL; | |
527 | ||
528 | /* do some minimum sanity checking */ | |
529 | if (!mipi_dsi_packet_format_is_short(msg->type) && | |
530 | !mipi_dsi_packet_format_is_long(msg->type)) | |
531 | return -EINVAL; | |
532 | ||
533 | if (msg->channel > 3) | |
534 | return -EINVAL; | |
535 | ||
536 | memset(packet, 0, sizeof(*packet)); | |
537 | packet->header[0] = ((msg->channel & 0x3) << 6) | (msg->type & 0x3f); | |
538 | ||
539 | /* TODO: compute ECC if hardware support is not available */ | |
540 | ||
541 | /* | |
542 | * Long write packets contain the word count in header bytes 1 and 2. | |
543 | * The payload follows the header and is word count bytes long. | |
544 | * | |
545 | * Short write packets encode up to two parameters in header bytes 1 | |
546 | * and 2. | |
547 | */ | |
548 | if (mipi_dsi_packet_format_is_long(msg->type)) { | |
549 | packet->header[1] = (msg->tx_len >> 0) & 0xff; | |
550 | packet->header[2] = (msg->tx_len >> 8) & 0xff; | |
551 | ||
552 | packet->payload_length = msg->tx_len; | |
9b97383b | 553 | packet->payload = msg->tx_buf; |
a52879e8 | 554 | } else { |
9b97383b TR |
555 | const u8 *tx = msg->tx_buf; |
556 | ||
a52879e8 TR |
557 | packet->header[1] = (msg->tx_len > 0) ? tx[0] : 0; |
558 | packet->header[2] = (msg->tx_len > 1) ? tx[1] : 0; | |
559 | } | |
560 | ||
561 | packet->size = sizeof(packet->header) + packet->payload_length; | |
562 | ||
563 | return 0; | |
564 | } | |
565 | EXPORT_SYMBOL(mipi_dsi_create_packet); | |
566 | ||
6e8c9e33 WJ |
567 | /** |
568 | * mipi_dsi_shutdown_peripheral() - sends a Shutdown Peripheral command | |
569 | * @dsi: DSI peripheral device | |
570 | * | |
571 | * Return: 0 on success or a negative error code on failure. | |
572 | */ | |
573 | int mipi_dsi_shutdown_peripheral(struct mipi_dsi_device *dsi) | |
574 | { | |
575 | struct mipi_dsi_msg msg = { | |
576 | .channel = dsi->channel, | |
577 | .type = MIPI_DSI_SHUTDOWN_PERIPHERAL, | |
578 | .tx_buf = (u8 [2]) { 0, 0 }, | |
579 | .tx_len = 2, | |
580 | }; | |
6ac69290 | 581 | int ret = mipi_dsi_device_transfer(dsi, &msg); |
6e8c9e33 | 582 | |
6ac69290 | 583 | return (ret < 0) ? ret : 0; |
6e8c9e33 WJ |
584 | } |
585 | EXPORT_SYMBOL(mipi_dsi_shutdown_peripheral); | |
586 | ||
587 | /** | |
588 | * mipi_dsi_turn_on_peripheral() - sends a Turn On Peripheral command | |
589 | * @dsi: DSI peripheral device | |
590 | * | |
591 | * Return: 0 on success or a negative error code on failure. | |
592 | */ | |
593 | int mipi_dsi_turn_on_peripheral(struct mipi_dsi_device *dsi) | |
594 | { | |
595 | struct mipi_dsi_msg msg = { | |
596 | .channel = dsi->channel, | |
597 | .type = MIPI_DSI_TURN_ON_PERIPHERAL, | |
598 | .tx_buf = (u8 [2]) { 0, 0 }, | |
599 | .tx_len = 2, | |
600 | }; | |
6ac69290 | 601 | int ret = mipi_dsi_device_transfer(dsi, &msg); |
6e8c9e33 | 602 | |
6ac69290 | 603 | return (ret < 0) ? ret : 0; |
6e8c9e33 WJ |
604 | } |
605 | EXPORT_SYMBOL(mipi_dsi_turn_on_peripheral); | |
606 | ||
dbf30b69 YC |
607 | /* |
608 | * mipi_dsi_set_maximum_return_packet_size() - specify the maximum size of the | |
609 | * the payload in a long packet transmitted from the peripheral back to the | |
610 | * host processor | |
611 | * @dsi: DSI peripheral device | |
612 | * @value: the maximum size of the payload | |
613 | * | |
614 | * Return: 0 on success or a negative error code on failure. | |
615 | */ | |
616 | int mipi_dsi_set_maximum_return_packet_size(struct mipi_dsi_device *dsi, | |
617 | u16 value) | |
618 | { | |
619 | u8 tx[2] = { value & 0xff, value >> 8 }; | |
620 | struct mipi_dsi_msg msg = { | |
621 | .channel = dsi->channel, | |
622 | .type = MIPI_DSI_SET_MAXIMUM_RETURN_PACKET_SIZE, | |
623 | .tx_len = sizeof(tx), | |
624 | .tx_buf = tx, | |
625 | }; | |
6ac69290 | 626 | int ret = mipi_dsi_device_transfer(dsi, &msg); |
dbf30b69 | 627 | |
6ac69290 | 628 | return (ret < 0) ? ret : 0; |
dbf30b69 YC |
629 | } |
630 | EXPORT_SYMBOL(mipi_dsi_set_maximum_return_packet_size); | |
631 | ||
f4dea1aa JN |
632 | /** |
633 | * mipi_dsi_compression_mode() - enable/disable DSC on the peripheral | |
634 | * @dsi: DSI peripheral device | |
635 | * @enable: Whether to enable or disable the DSC | |
636 | * | |
637 | * Enable or disable Display Stream Compression on the peripheral using the | |
638 | * default Picture Parameter Set and VESA DSC 1.1 algorithm. | |
639 | * | |
640 | * Return: 0 on success or a negative error code on failure. | |
641 | */ | |
642 | ssize_t mipi_dsi_compression_mode(struct mipi_dsi_device *dsi, bool enable) | |
643 | { | |
644 | /* Note: Needs updating for non-default PPS or algorithm */ | |
645 | u8 tx[2] = { enable << 0, 0 }; | |
646 | struct mipi_dsi_msg msg = { | |
647 | .channel = dsi->channel, | |
648 | .type = MIPI_DSI_COMPRESSION_MODE, | |
649 | .tx_len = sizeof(tx), | |
650 | .tx_buf = tx, | |
651 | }; | |
652 | int ret = mipi_dsi_device_transfer(dsi, &msg); | |
653 | ||
654 | return (ret < 0) ? ret : 0; | |
655 | } | |
656 | EXPORT_SYMBOL(mipi_dsi_compression_mode); | |
657 | ||
658 | /** | |
659 | * mipi_dsi_picture_parameter_set() - transmit the DSC PPS to the peripheral | |
660 | * @dsi: DSI peripheral device | |
661 | * @pps: VESA DSC 1.1 Picture Parameter Set | |
662 | * | |
663 | * Transmit the VESA DSC 1.1 Picture Parameter Set to the peripheral. | |
664 | * | |
665 | * Return: 0 on success or a negative error code on failure. | |
666 | */ | |
667 | ssize_t mipi_dsi_picture_parameter_set(struct mipi_dsi_device *dsi, | |
668 | const struct drm_dsc_picture_parameter_set *pps) | |
669 | { | |
670 | struct mipi_dsi_msg msg = { | |
671 | .channel = dsi->channel, | |
672 | .type = MIPI_DSI_PICTURE_PARAMETER_SET, | |
673 | .tx_len = sizeof(*pps), | |
674 | .tx_buf = pps, | |
675 | }; | |
676 | int ret = mipi_dsi_device_transfer(dsi, &msg); | |
677 | ||
678 | return (ret < 0) ? ret : 0; | |
679 | } | |
680 | EXPORT_SYMBOL(mipi_dsi_picture_parameter_set); | |
681 | ||
550ab848 TR |
682 | /** |
683 | * mipi_dsi_generic_write() - transmit data using a generic write packet | |
684 | * @dsi: DSI peripheral device | |
685 | * @payload: buffer containing the payload | |
686 | * @size: size of payload buffer | |
687 | * | |
688 | * This function will automatically choose the right data type depending on | |
689 | * the payload length. | |
690 | * | |
691 | * Return: The number of bytes transmitted on success or a negative error code | |
692 | * on failure. | |
693 | */ | |
694 | ssize_t mipi_dsi_generic_write(struct mipi_dsi_device *dsi, const void *payload, | |
695 | size_t size) | |
696 | { | |
697 | struct mipi_dsi_msg msg = { | |
698 | .channel = dsi->channel, | |
699 | .tx_buf = payload, | |
700 | .tx_len = size | |
701 | }; | |
702 | ||
703 | switch (size) { | |
704 | case 0: | |
705 | msg.type = MIPI_DSI_GENERIC_SHORT_WRITE_0_PARAM; | |
706 | break; | |
707 | ||
708 | case 1: | |
709 | msg.type = MIPI_DSI_GENERIC_SHORT_WRITE_1_PARAM; | |
710 | break; | |
711 | ||
712 | case 2: | |
713 | msg.type = MIPI_DSI_GENERIC_SHORT_WRITE_2_PARAM; | |
714 | break; | |
715 | ||
716 | default: | |
717 | msg.type = MIPI_DSI_GENERIC_LONG_WRITE; | |
718 | break; | |
719 | } | |
720 | ||
721 | return mipi_dsi_device_transfer(dsi, &msg); | |
722 | } | |
723 | EXPORT_SYMBOL(mipi_dsi_generic_write); | |
724 | ||
725 | /** | |
726 | * mipi_dsi_generic_read() - receive data using a generic read packet | |
727 | * @dsi: DSI peripheral device | |
728 | * @params: buffer containing the request parameters | |
729 | * @num_params: number of request parameters | |
730 | * @data: buffer in which to return the received data | |
731 | * @size: size of receive buffer | |
732 | * | |
733 | * This function will automatically choose the right data type depending on | |
734 | * the number of parameters passed in. | |
735 | * | |
736 | * Return: The number of bytes successfully read or a negative error code on | |
737 | * failure. | |
738 | */ | |
739 | ssize_t mipi_dsi_generic_read(struct mipi_dsi_device *dsi, const void *params, | |
740 | size_t num_params, void *data, size_t size) | |
741 | { | |
742 | struct mipi_dsi_msg msg = { | |
743 | .channel = dsi->channel, | |
744 | .tx_len = num_params, | |
745 | .tx_buf = params, | |
746 | .rx_len = size, | |
747 | .rx_buf = data | |
748 | }; | |
749 | ||
750 | switch (num_params) { | |
751 | case 0: | |
752 | msg.type = MIPI_DSI_GENERIC_READ_REQUEST_0_PARAM; | |
753 | break; | |
754 | ||
755 | case 1: | |
756 | msg.type = MIPI_DSI_GENERIC_READ_REQUEST_1_PARAM; | |
757 | break; | |
758 | ||
759 | case 2: | |
760 | msg.type = MIPI_DSI_GENERIC_READ_REQUEST_2_PARAM; | |
761 | break; | |
762 | ||
763 | default: | |
764 | return -EINVAL; | |
765 | } | |
766 | ||
767 | return mipi_dsi_device_transfer(dsi, &msg); | |
768 | } | |
769 | EXPORT_SYMBOL(mipi_dsi_generic_read); | |
770 | ||
068a0023 | 771 | /** |
960dd616 TR |
772 | * mipi_dsi_dcs_write_buffer() - transmit a DCS command with payload |
773 | * @dsi: DSI peripheral device | |
774 | * @data: buffer containing data to be transmitted | |
775 | * @len: size of transmission buffer | |
776 | * | |
777 | * This function will automatically choose the right data type depending on | |
778 | * the command payload length. | |
779 | * | |
780 | * Return: The number of bytes successfully transmitted or a negative error | |
781 | * code on failure. | |
068a0023 | 782 | */ |
960dd616 TR |
783 | ssize_t mipi_dsi_dcs_write_buffer(struct mipi_dsi_device *dsi, |
784 | const void *data, size_t len) | |
068a0023 | 785 | { |
068a0023 | 786 | struct mipi_dsi_msg msg = { |
3c523d7d | 787 | .channel = dsi->channel, |
068a0023 AH |
788 | .tx_buf = data, |
789 | .tx_len = len | |
790 | }; | |
791 | ||
068a0023 AH |
792 | switch (len) { |
793 | case 0: | |
794 | return -EINVAL; | |
960dd616 | 795 | |
068a0023 AH |
796 | case 1: |
797 | msg.type = MIPI_DSI_DCS_SHORT_WRITE; | |
798 | break; | |
960dd616 | 799 | |
068a0023 AH |
800 | case 2: |
801 | msg.type = MIPI_DSI_DCS_SHORT_WRITE_PARAM; | |
802 | break; | |
960dd616 | 803 | |
068a0023 AH |
804 | default: |
805 | msg.type = MIPI_DSI_DCS_LONG_WRITE; | |
806 | break; | |
807 | } | |
808 | ||
9eb491f3 | 809 | return mipi_dsi_device_transfer(dsi, &msg); |
068a0023 | 810 | } |
960dd616 TR |
811 | EXPORT_SYMBOL(mipi_dsi_dcs_write_buffer); |
812 | ||
813 | /** | |
814 | * mipi_dsi_dcs_write() - send DCS write command | |
815 | * @dsi: DSI peripheral device | |
816 | * @cmd: DCS command | |
817 | * @data: buffer containing the command payload | |
818 | * @len: command payload length | |
819 | * | |
820 | * This function will automatically choose the right data type depending on | |
821 | * the command payload length. | |
822 | * | |
823 | * Return: The number of bytes successfully transmitted or a negative error | |
824 | * code on failure. | |
825 | */ | |
826 | ssize_t mipi_dsi_dcs_write(struct mipi_dsi_device *dsi, u8 cmd, | |
827 | const void *data, size_t len) | |
828 | { | |
829 | ssize_t err; | |
830 | size_t size; | |
e192fba2 | 831 | u8 stack_tx[8]; |
960dd616 TR |
832 | u8 *tx; |
833 | ||
e192fba2 EV |
834 | size = 1 + len; |
835 | if (len > ARRAY_SIZE(stack_tx) - 1) { | |
960dd616 TR |
836 | tx = kmalloc(size, GFP_KERNEL); |
837 | if (!tx) | |
838 | return -ENOMEM; | |
960dd616 | 839 | } else { |
e192fba2 | 840 | tx = stack_tx; |
960dd616 TR |
841 | } |
842 | ||
e192fba2 EV |
843 | /* concatenate the DCS command byte and the payload */ |
844 | tx[0] = cmd; | |
845 | if (data) | |
846 | memcpy(&tx[1], data, len); | |
847 | ||
960dd616 TR |
848 | err = mipi_dsi_dcs_write_buffer(dsi, tx, size); |
849 | ||
e192fba2 | 850 | if (tx != stack_tx) |
960dd616 TR |
851 | kfree(tx); |
852 | ||
853 | return err; | |
854 | } | |
068a0023 AH |
855 | EXPORT_SYMBOL(mipi_dsi_dcs_write); |
856 | ||
857 | /** | |
960dd616 TR |
858 | * mipi_dsi_dcs_read() - send DCS read request command |
859 | * @dsi: DSI peripheral device | |
860 | * @cmd: DCS command | |
861 | * @data: buffer in which to receive data | |
862 | * @len: size of receive buffer | |
068a0023 | 863 | * |
960dd616 | 864 | * Return: The number of bytes read or a negative error code on failure. |
068a0023 | 865 | */ |
3c523d7d TR |
866 | ssize_t mipi_dsi_dcs_read(struct mipi_dsi_device *dsi, u8 cmd, void *data, |
867 | size_t len) | |
068a0023 | 868 | { |
068a0023 | 869 | struct mipi_dsi_msg msg = { |
3c523d7d | 870 | .channel = dsi->channel, |
068a0023 AH |
871 | .type = MIPI_DSI_DCS_READ, |
872 | .tx_buf = &cmd, | |
873 | .tx_len = 1, | |
874 | .rx_buf = data, | |
875 | .rx_len = len | |
876 | }; | |
877 | ||
9eb491f3 | 878 | return mipi_dsi_device_transfer(dsi, &msg); |
068a0023 AH |
879 | } |
880 | EXPORT_SYMBOL(mipi_dsi_dcs_read); | |
881 | ||
083d573f TR |
882 | /** |
883 | * mipi_dsi_dcs_nop() - send DCS nop packet | |
884 | * @dsi: DSI peripheral device | |
885 | * | |
886 | * Return: 0 on success or a negative error code on failure. | |
887 | */ | |
888 | int mipi_dsi_dcs_nop(struct mipi_dsi_device *dsi) | |
889 | { | |
890 | ssize_t err; | |
891 | ||
892 | err = mipi_dsi_dcs_write(dsi, MIPI_DCS_NOP, NULL, 0); | |
893 | if (err < 0) | |
894 | return err; | |
895 | ||
896 | return 0; | |
897 | } | |
898 | EXPORT_SYMBOL(mipi_dsi_dcs_nop); | |
899 | ||
2f16b897 TR |
900 | /** |
901 | * mipi_dsi_dcs_soft_reset() - perform a software reset of the display module | |
902 | * @dsi: DSI peripheral device | |
903 | * | |
904 | * Return: 0 on success or a negative error code on failure. | |
905 | */ | |
906 | int mipi_dsi_dcs_soft_reset(struct mipi_dsi_device *dsi) | |
907 | { | |
908 | ssize_t err; | |
909 | ||
910 | err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SOFT_RESET, NULL, 0); | |
911 | if (err < 0) | |
912 | return err; | |
913 | ||
914 | return 0; | |
915 | } | |
916 | EXPORT_SYMBOL(mipi_dsi_dcs_soft_reset); | |
917 | ||
3d9a8fcf TR |
918 | /** |
919 | * mipi_dsi_dcs_get_power_mode() - query the display module's current power | |
920 | * mode | |
921 | * @dsi: DSI peripheral device | |
922 | * @mode: return location for the current power mode | |
923 | * | |
924 | * Return: 0 on success or a negative error code on failure. | |
925 | */ | |
926 | int mipi_dsi_dcs_get_power_mode(struct mipi_dsi_device *dsi, u8 *mode) | |
927 | { | |
928 | ssize_t err; | |
929 | ||
930 | err = mipi_dsi_dcs_read(dsi, MIPI_DCS_GET_POWER_MODE, mode, | |
931 | sizeof(*mode)); | |
932 | if (err <= 0) { | |
933 | if (err == 0) | |
934 | err = -ENODATA; | |
935 | ||
936 | return err; | |
937 | } | |
938 | ||
939 | return 0; | |
940 | } | |
941 | EXPORT_SYMBOL(mipi_dsi_dcs_get_power_mode); | |
942 | ||
5cc0af16 TR |
943 | /** |
944 | * mipi_dsi_dcs_get_pixel_format() - gets the pixel format for the RGB image | |
945 | * data used by the interface | |
946 | * @dsi: DSI peripheral device | |
947 | * @format: return location for the pixel format | |
948 | * | |
949 | * Return: 0 on success or a negative error code on failure. | |
950 | */ | |
951 | int mipi_dsi_dcs_get_pixel_format(struct mipi_dsi_device *dsi, u8 *format) | |
952 | { | |
953 | ssize_t err; | |
954 | ||
955 | err = mipi_dsi_dcs_read(dsi, MIPI_DCS_GET_PIXEL_FORMAT, format, | |
956 | sizeof(*format)); | |
957 | if (err <= 0) { | |
958 | if (err == 0) | |
959 | err = -ENODATA; | |
960 | ||
961 | return err; | |
962 | } | |
963 | ||
964 | return 0; | |
965 | } | |
966 | EXPORT_SYMBOL(mipi_dsi_dcs_get_pixel_format); | |
967 | ||
42fe1e75 YC |
968 | /** |
969 | * mipi_dsi_dcs_enter_sleep_mode() - disable all unnecessary blocks inside the | |
970 | * display module except interface communication | |
971 | * @dsi: DSI peripheral device | |
972 | * | |
973 | * Return: 0 on success or a negative error code on failure. | |
974 | */ | |
975 | int mipi_dsi_dcs_enter_sleep_mode(struct mipi_dsi_device *dsi) | |
976 | { | |
977 | ssize_t err; | |
978 | ||
979 | err = mipi_dsi_dcs_write(dsi, MIPI_DCS_ENTER_SLEEP_MODE, NULL, 0); | |
980 | if (err < 0) | |
981 | return err; | |
982 | ||
983 | return 0; | |
984 | } | |
985 | EXPORT_SYMBOL(mipi_dsi_dcs_enter_sleep_mode); | |
986 | ||
987 | /** | |
988 | * mipi_dsi_dcs_exit_sleep_mode() - enable all blocks inside the display | |
989 | * module | |
990 | * @dsi: DSI peripheral device | |
991 | * | |
992 | * Return: 0 on success or a negative error code on failure. | |
993 | */ | |
994 | int mipi_dsi_dcs_exit_sleep_mode(struct mipi_dsi_device *dsi) | |
995 | { | |
996 | ssize_t err; | |
997 | ||
998 | err = mipi_dsi_dcs_write(dsi, MIPI_DCS_EXIT_SLEEP_MODE, NULL, 0); | |
999 | if (err < 0) | |
1000 | return err; | |
1001 | ||
1002 | return 0; | |
1003 | } | |
1004 | EXPORT_SYMBOL(mipi_dsi_dcs_exit_sleep_mode); | |
1005 | ||
1006 | /** | |
1007 | * mipi_dsi_dcs_set_display_off() - stop displaying the image data on the | |
1008 | * display device | |
1009 | * @dsi: DSI peripheral device | |
1010 | * | |
1011 | * Return: 0 on success or a negative error code on failure. | |
1012 | */ | |
1013 | int mipi_dsi_dcs_set_display_off(struct mipi_dsi_device *dsi) | |
1014 | { | |
1015 | ssize_t err; | |
1016 | ||
1017 | err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_DISPLAY_OFF, NULL, 0); | |
1018 | if (err < 0) | |
1019 | return err; | |
1020 | ||
1021 | return 0; | |
1022 | } | |
1023 | EXPORT_SYMBOL(mipi_dsi_dcs_set_display_off); | |
1024 | ||
1025 | /** | |
1026 | * mipi_dsi_dcs_set_display_on() - start displaying the image data on the | |
1027 | * display device | |
1028 | * @dsi: DSI peripheral device | |
1029 | * | |
1030 | * Return: 0 on success or a negative error code on failure | |
1031 | */ | |
1032 | int mipi_dsi_dcs_set_display_on(struct mipi_dsi_device *dsi) | |
1033 | { | |
1034 | ssize_t err; | |
1035 | ||
1036 | err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_DISPLAY_ON, NULL, 0); | |
1037 | if (err < 0) | |
1038 | return err; | |
1039 | ||
1040 | return 0; | |
1041 | } | |
1042 | EXPORT_SYMBOL(mipi_dsi_dcs_set_display_on); | |
1043 | ||
3b46d4a0 TR |
1044 | /** |
1045 | * mipi_dsi_dcs_set_column_address() - define the column extent of the frame | |
1046 | * memory accessed by the host processor | |
1047 | * @dsi: DSI peripheral device | |
1048 | * @start: first column of frame memory | |
1049 | * @end: last column of frame memory | |
1050 | * | |
1051 | * Return: 0 on success or a negative error code on failure. | |
1052 | */ | |
1053 | int mipi_dsi_dcs_set_column_address(struct mipi_dsi_device *dsi, u16 start, | |
1054 | u16 end) | |
1055 | { | |
1056 | u8 payload[4] = { start >> 8, start & 0xff, end >> 8, end & 0xff }; | |
1057 | ssize_t err; | |
1058 | ||
1059 | err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_COLUMN_ADDRESS, payload, | |
1060 | sizeof(payload)); | |
1061 | if (err < 0) | |
1062 | return err; | |
1063 | ||
1064 | return 0; | |
1065 | } | |
1066 | EXPORT_SYMBOL(mipi_dsi_dcs_set_column_address); | |
1067 | ||
1068 | /** | |
1069 | * mipi_dsi_dcs_set_page_address() - define the page extent of the frame | |
1070 | * memory accessed by the host processor | |
1071 | * @dsi: DSI peripheral device | |
1072 | * @start: first page of frame memory | |
1073 | * @end: last page of frame memory | |
1074 | * | |
1075 | * Return: 0 on success or a negative error code on failure. | |
1076 | */ | |
1077 | int mipi_dsi_dcs_set_page_address(struct mipi_dsi_device *dsi, u16 start, | |
1078 | u16 end) | |
1079 | { | |
1080 | u8 payload[4] = { start >> 8, start & 0xff, end >> 8, end & 0xff }; | |
1081 | ssize_t err; | |
1082 | ||
1083 | err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_PAGE_ADDRESS, payload, | |
1084 | sizeof(payload)); | |
1085 | if (err < 0) | |
1086 | return err; | |
1087 | ||
1088 | return 0; | |
1089 | } | |
1090 | EXPORT_SYMBOL(mipi_dsi_dcs_set_page_address); | |
1091 | ||
42fe1e75 YC |
1092 | /** |
1093 | * mipi_dsi_dcs_set_tear_off() - turn off the display module's Tearing Effect | |
1094 | * output signal on the TE signal line | |
1095 | * @dsi: DSI peripheral device | |
1096 | * | |
1097 | * Return: 0 on success or a negative error code on failure | |
1098 | */ | |
1099 | int mipi_dsi_dcs_set_tear_off(struct mipi_dsi_device *dsi) | |
1100 | { | |
1101 | ssize_t err; | |
1102 | ||
1103 | err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_TEAR_OFF, NULL, 0); | |
1104 | if (err < 0) | |
1105 | return err; | |
1106 | ||
1107 | return 0; | |
1108 | } | |
1109 | EXPORT_SYMBOL(mipi_dsi_dcs_set_tear_off); | |
1110 | ||
1111 | /** | |
1112 | * mipi_dsi_dcs_set_tear_on() - turn on the display module's Tearing Effect | |
1113 | * output signal on the TE signal line. | |
1114 | * @dsi: DSI peripheral device | |
1115 | * @mode: the Tearing Effect Output Line mode | |
1116 | * | |
1117 | * Return: 0 on success or a negative error code on failure | |
1118 | */ | |
1119 | int mipi_dsi_dcs_set_tear_on(struct mipi_dsi_device *dsi, | |
1120 | enum mipi_dsi_dcs_tear_mode mode) | |
1121 | { | |
1122 | u8 value = mode; | |
1123 | ssize_t err; | |
1124 | ||
1125 | err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_TEAR_ON, &value, | |
1126 | sizeof(value)); | |
1127 | if (err < 0) | |
1128 | return err; | |
1129 | ||
1130 | return 0; | |
1131 | } | |
1132 | EXPORT_SYMBOL(mipi_dsi_dcs_set_tear_on); | |
1133 | ||
e8395081 | 1134 | /** |
bbdcf516 TR |
1135 | * mipi_dsi_dcs_set_pixel_format() - sets the pixel format for the RGB image |
1136 | * data used by the interface | |
e8395081 | 1137 | * @dsi: DSI peripheral device |
bbdcf516 | 1138 | * @format: pixel format |
6308c983 | 1139 | * |
bbdcf516 | 1140 | * Return: 0 on success or a negative error code on failure. |
e8395081 | 1141 | */ |
bbdcf516 | 1142 | int mipi_dsi_dcs_set_pixel_format(struct mipi_dsi_device *dsi, u8 format) |
e8395081 | 1143 | { |
e8395081 VSB |
1144 | ssize_t err; |
1145 | ||
bbdcf516 TR |
1146 | err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_PIXEL_FORMAT, &format, |
1147 | sizeof(format)); | |
e8395081 VSB |
1148 | if (err < 0) |
1149 | return err; | |
1150 | ||
1151 | return 0; | |
1152 | } | |
bbdcf516 | 1153 | EXPORT_SYMBOL(mipi_dsi_dcs_set_pixel_format); |
e8395081 | 1154 | |
5cc0af16 | 1155 | /** |
bbdcf516 TR |
1156 | * mipi_dsi_dcs_set_tear_scanline() - set the scanline to use as trigger for |
1157 | * the Tearing Effect output signal of the display module | |
5cc0af16 | 1158 | * @dsi: DSI peripheral device |
bbdcf516 | 1159 | * @scanline: scanline to use as trigger |
5cc0af16 | 1160 | * |
bbdcf516 | 1161 | * Return: 0 on success or a negative error code on failure |
5cc0af16 | 1162 | */ |
bbdcf516 | 1163 | int mipi_dsi_dcs_set_tear_scanline(struct mipi_dsi_device *dsi, u16 scanline) |
5cc0af16 | 1164 | { |
7a05c3b6 | 1165 | u8 payload[2] = { scanline >> 8, scanline & 0xff }; |
5cc0af16 TR |
1166 | ssize_t err; |
1167 | ||
7a05c3b6 EV |
1168 | err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_TEAR_SCANLINE, payload, |
1169 | sizeof(payload)); | |
5cc0af16 TR |
1170 | if (err < 0) |
1171 | return err; | |
1172 | ||
1173 | return 0; | |
1174 | } | |
bbdcf516 | 1175 | EXPORT_SYMBOL(mipi_dsi_dcs_set_tear_scanline); |
5cc0af16 | 1176 | |
1a9d7593 VSB |
1177 | /** |
1178 | * mipi_dsi_dcs_set_display_brightness() - sets the brightness value of the | |
1179 | * display | |
1180 | * @dsi: DSI peripheral device | |
1181 | * @brightness: brightness value | |
1182 | * | |
1183 | * Return: 0 on success or a negative error code on failure. | |
1184 | */ | |
1185 | int mipi_dsi_dcs_set_display_brightness(struct mipi_dsi_device *dsi, | |
1186 | u16 brightness) | |
1187 | { | |
1188 | u8 payload[2] = { brightness & 0xff, brightness >> 8 }; | |
1189 | ssize_t err; | |
1190 | ||
1191 | err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_DISPLAY_BRIGHTNESS, | |
1192 | payload, sizeof(payload)); | |
1193 | if (err < 0) | |
1194 | return err; | |
1195 | ||
1196 | return 0; | |
1197 | } | |
1198 | EXPORT_SYMBOL(mipi_dsi_dcs_set_display_brightness); | |
1199 | ||
1200 | /** | |
1201 | * mipi_dsi_dcs_get_display_brightness() - gets the current brightness value | |
1202 | * of the display | |
1203 | * @dsi: DSI peripheral device | |
1204 | * @brightness: brightness value | |
1205 | * | |
1206 | * Return: 0 on success or a negative error code on failure. | |
1207 | */ | |
1208 | int mipi_dsi_dcs_get_display_brightness(struct mipi_dsi_device *dsi, | |
1209 | u16 *brightness) | |
1210 | { | |
1211 | ssize_t err; | |
1212 | ||
1213 | err = mipi_dsi_dcs_read(dsi, MIPI_DCS_GET_DISPLAY_BRIGHTNESS, | |
1214 | brightness, sizeof(*brightness)); | |
1215 | if (err <= 0) { | |
1216 | if (err == 0) | |
1217 | err = -ENODATA; | |
1218 | ||
1219 | return err; | |
1220 | } | |
1221 | ||
1222 | return 0; | |
1223 | } | |
1224 | EXPORT_SYMBOL(mipi_dsi_dcs_get_display_brightness); | |
1225 | ||
068a0023 AH |
1226 | static int mipi_dsi_drv_probe(struct device *dev) |
1227 | { | |
1228 | struct mipi_dsi_driver *drv = to_mipi_dsi_driver(dev->driver); | |
1229 | struct mipi_dsi_device *dsi = to_mipi_dsi_device(dev); | |
1230 | ||
1231 | return drv->probe(dsi); | |
1232 | } | |
1233 | ||
1234 | static int mipi_dsi_drv_remove(struct device *dev) | |
1235 | { | |
1236 | struct mipi_dsi_driver *drv = to_mipi_dsi_driver(dev->driver); | |
1237 | struct mipi_dsi_device *dsi = to_mipi_dsi_device(dev); | |
1238 | ||
1239 | return drv->remove(dsi); | |
1240 | } | |
1241 | ||
d1621803 TR |
1242 | static void mipi_dsi_drv_shutdown(struct device *dev) |
1243 | { | |
1244 | struct mipi_dsi_driver *drv = to_mipi_dsi_driver(dev->driver); | |
1245 | struct mipi_dsi_device *dsi = to_mipi_dsi_device(dev); | |
1246 | ||
1247 | drv->shutdown(dsi); | |
1248 | } | |
1249 | ||
068a0023 | 1250 | /** |
99035e99 | 1251 | * mipi_dsi_driver_register_full() - register a driver for DSI devices |
068a0023 | 1252 | * @drv: DSI driver structure |
99035e99 | 1253 | * @owner: owner module |
009081e0 TR |
1254 | * |
1255 | * Return: 0 on success or a negative error code on failure. | |
068a0023 | 1256 | */ |
99035e99 TR |
1257 | int mipi_dsi_driver_register_full(struct mipi_dsi_driver *drv, |
1258 | struct module *owner) | |
068a0023 AH |
1259 | { |
1260 | drv->driver.bus = &mipi_dsi_bus_type; | |
99035e99 TR |
1261 | drv->driver.owner = owner; |
1262 | ||
068a0023 AH |
1263 | if (drv->probe) |
1264 | drv->driver.probe = mipi_dsi_drv_probe; | |
1265 | if (drv->remove) | |
1266 | drv->driver.remove = mipi_dsi_drv_remove; | |
d1621803 TR |
1267 | if (drv->shutdown) |
1268 | drv->driver.shutdown = mipi_dsi_drv_shutdown; | |
068a0023 AH |
1269 | |
1270 | return driver_register(&drv->driver); | |
1271 | } | |
99035e99 | 1272 | EXPORT_SYMBOL(mipi_dsi_driver_register_full); |
068a0023 AH |
1273 | |
1274 | /** | |
009081e0 | 1275 | * mipi_dsi_driver_unregister() - unregister a driver for DSI devices |
068a0023 | 1276 | * @drv: DSI driver structure |
009081e0 TR |
1277 | * |
1278 | * Return: 0 on success or a negative error code on failure. | |
068a0023 AH |
1279 | */ |
1280 | void mipi_dsi_driver_unregister(struct mipi_dsi_driver *drv) | |
1281 | { | |
1282 | driver_unregister(&drv->driver); | |
1283 | } | |
1284 | EXPORT_SYMBOL(mipi_dsi_driver_unregister); | |
1285 | ||
1286 | static int __init mipi_dsi_bus_init(void) | |
1287 | { | |
1288 | return bus_register(&mipi_dsi_bus_type); | |
1289 | } | |
1290 | postcore_initcall(mipi_dsi_bus_init); | |
1291 | ||
1292 | MODULE_AUTHOR("Andrzej Hajda <a.hajda@samsung.com>"); | |
1293 | MODULE_DESCRIPTION("MIPI DSI Bus"); | |
1294 | MODULE_LICENSE("GPL and additional rights"); |