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d3953223 SN |
1 | /* |
2 | * S5P/EXYNOS4 SoC series camera host interface media device driver | |
3 | * | |
4 | * Copyright (C) 2011 Samsung Electronics Co., Ltd. | |
5 | * Contact: Sylwester Nawrocki, <s.nawrocki@samsung.com> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published | |
9 | * by the Free Software Foundation, either version 2 of the License, | |
10 | * or (at your option) any later version. | |
11 | */ | |
12 | ||
13 | #include <linux/bug.h> | |
14 | #include <linux/device.h> | |
15 | #include <linux/errno.h> | |
16 | #include <linux/i2c.h> | |
17 | #include <linux/kernel.h> | |
18 | #include <linux/list.h> | |
19 | #include <linux/module.h> | |
20 | #include <linux/platform_device.h> | |
21 | #include <linux/pm_runtime.h> | |
22 | #include <linux/types.h> | |
23 | #include <linux/slab.h> | |
131b6c61 | 24 | #include <media/v4l2-ctrls.h> |
d3953223 SN |
25 | #include <media/media-device.h> |
26 | ||
27 | #include "fimc-core.h" | |
0f735f52 | 28 | #include "fimc-lite.h" |
d3953223 SN |
29 | #include "fimc-mdevice.h" |
30 | #include "mipi-csis.h" | |
31 | ||
32 | static int __fimc_md_set_camclk(struct fimc_md *fmd, | |
33 | struct fimc_sensor_info *s_info, | |
34 | bool on); | |
35 | /** | |
36 | * fimc_pipeline_prepare - update pipeline information with subdevice pointers | |
37 | * @fimc: fimc device terminating the pipeline | |
38 | * | |
39 | * Caller holds the graph mutex. | |
40 | */ | |
0f735f52 | 41 | void fimc_pipeline_prepare(struct fimc_pipeline *p, struct media_entity *me) |
d3953223 | 42 | { |
0f735f52 | 43 | struct media_pad *pad = &me->pads[0]; |
d3953223 | 44 | struct v4l2_subdev *sd; |
0f735f52 | 45 | int i; |
d3953223 | 46 | |
0f735f52 SN |
47 | for (i = 0; i < IDX_MAX; i++) |
48 | p->subdevs[i] = NULL; | |
d3953223 | 49 | |
0f735f52 SN |
50 | while (1) { |
51 | if (!(pad->flags & MEDIA_PAD_FL_SINK)) | |
52 | break; | |
53 | ||
54 | /* source pad */ | |
55 | pad = media_entity_remote_source(pad); | |
56 | if (pad == NULL || | |
57 | media_entity_type(pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV) | |
58 | break; | |
d3953223 | 59 | |
0f735f52 SN |
60 | sd = media_entity_to_v4l2_subdev(pad->entity); |
61 | ||
62 | switch (sd->grp_id) { | |
63 | case SENSOR_GROUP_ID: | |
64 | p->subdevs[IDX_SENSOR] = sd; | |
65 | break; | |
66 | case CSIS_GROUP_ID: | |
67 | p->subdevs[IDX_CSIS] = sd; | |
68 | break; | |
4af81310 SN |
69 | case FLITE_GROUP_ID: |
70 | p->subdevs[IDX_FLITE] = sd; | |
71 | break; | |
0f735f52 SN |
72 | case FIMC_GROUP_ID: |
73 | /* No need to control FIMC subdev through subdev ops */ | |
74 | break; | |
75 | default: | |
76 | pr_warn("%s: Unknown subdev grp_id: %#x\n", | |
77 | __func__, sd->grp_id); | |
78 | } | |
79 | /* sink pad */ | |
80 | pad = &sd->entity.pads[0]; | |
d3953223 SN |
81 | } |
82 | } | |
83 | ||
84 | /** | |
85 | * __subdev_set_power - change power state of a single subdev | |
86 | * @sd: subdevice to change power state for | |
87 | * @on: 1 to enable power or 0 to disable | |
88 | * | |
89 | * Return result of s_power subdev operation or -ENXIO if sd argument | |
90 | * is NULL. Return 0 if the subdevice does not implement s_power. | |
91 | */ | |
92 | static int __subdev_set_power(struct v4l2_subdev *sd, int on) | |
93 | { | |
94 | int *use_count; | |
95 | int ret; | |
96 | ||
97 | if (sd == NULL) | |
98 | return -ENXIO; | |
99 | ||
100 | use_count = &sd->entity.use_count; | |
101 | if (on && (*use_count)++ > 0) | |
102 | return 0; | |
103 | else if (!on && (*use_count == 0 || --(*use_count) > 0)) | |
104 | return 0; | |
105 | ret = v4l2_subdev_call(sd, core, s_power, on); | |
106 | ||
107 | return ret != -ENOIOCTLCMD ? ret : 0; | |
108 | } | |
109 | ||
110 | /** | |
111 | * fimc_pipeline_s_power - change power state of all pipeline subdevs | |
112 | * @fimc: fimc device terminating the pipeline | |
0f735f52 | 113 | * @state: true to power on, false to power off |
d3953223 | 114 | * |
0f735f52 | 115 | * Needs to be called with the graph mutex held. |
d3953223 | 116 | */ |
0f735f52 | 117 | int fimc_pipeline_s_power(struct fimc_pipeline *p, bool state) |
d3953223 | 118 | { |
0f735f52 SN |
119 | unsigned int i; |
120 | int ret; | |
d3953223 | 121 | |
0f735f52 | 122 | if (p->subdevs[IDX_SENSOR] == NULL) |
d3953223 SN |
123 | return -ENXIO; |
124 | ||
0f735f52 SN |
125 | for (i = 0; i < IDX_MAX; i++) { |
126 | unsigned int idx = state ? (IDX_MAX - 1) - i : i; | |
127 | ||
128 | ret = __subdev_set_power(p->subdevs[idx], state); | |
129 | if (ret < 0 && ret != -ENXIO) | |
d3953223 | 130 | return ret; |
d3953223 SN |
131 | } |
132 | ||
0f735f52 | 133 | return 0; |
d3953223 SN |
134 | } |
135 | ||
136 | /** | |
137 | * __fimc_pipeline_initialize - update the pipeline information, enable power | |
138 | * of all pipeline subdevs and the sensor clock | |
139 | * @me: media entity to start graph walk with | |
140 | * @prep: true to acquire sensor (and csis) subdevs | |
141 | * | |
142 | * This function must be called with the graph mutex held. | |
143 | */ | |
0f735f52 | 144 | static int __fimc_pipeline_initialize(struct fimc_pipeline *p, |
d3953223 SN |
145 | struct media_entity *me, bool prep) |
146 | { | |
147 | int ret; | |
148 | ||
149 | if (prep) | |
0f735f52 SN |
150 | fimc_pipeline_prepare(p, me); |
151 | ||
152 | if (p->subdevs[IDX_SENSOR] == NULL) | |
d3953223 | 153 | return -EINVAL; |
0f735f52 SN |
154 | |
155 | ret = fimc_md_set_camclk(p->subdevs[IDX_SENSOR], true); | |
d3953223 SN |
156 | if (ret) |
157 | return ret; | |
0f735f52 SN |
158 | |
159 | return fimc_pipeline_s_power(p, 1); | |
d3953223 SN |
160 | } |
161 | ||
0f735f52 | 162 | int fimc_pipeline_initialize(struct fimc_pipeline *p, struct media_entity *me, |
d3953223 SN |
163 | bool prep) |
164 | { | |
165 | int ret; | |
166 | ||
167 | mutex_lock(&me->parent->graph_mutex); | |
0f735f52 | 168 | ret = __fimc_pipeline_initialize(p, me, prep); |
d3953223 SN |
169 | mutex_unlock(&me->parent->graph_mutex); |
170 | ||
171 | return ret; | |
172 | } | |
0f735f52 | 173 | EXPORT_SYMBOL_GPL(fimc_pipeline_initialize); |
d3953223 SN |
174 | |
175 | /** | |
176 | * __fimc_pipeline_shutdown - disable the sensor clock and pipeline power | |
177 | * @fimc: fimc device terminating the pipeline | |
178 | * | |
179 | * Disable power of all subdevs in the pipeline and turn off the external | |
180 | * sensor clock. | |
181 | * Called with the graph mutex held. | |
182 | */ | |
0f735f52 | 183 | int __fimc_pipeline_shutdown(struct fimc_pipeline *p) |
d3953223 SN |
184 | { |
185 | int ret = 0; | |
186 | ||
0f735f52 SN |
187 | if (p->subdevs[IDX_SENSOR]) { |
188 | ret = fimc_pipeline_s_power(p, 0); | |
189 | fimc_md_set_camclk(p->subdevs[IDX_SENSOR], false); | |
d3953223 SN |
190 | } |
191 | return ret == -ENXIO ? 0 : ret; | |
192 | } | |
193 | ||
0f735f52 | 194 | int fimc_pipeline_shutdown(struct fimc_pipeline *p) |
d3953223 | 195 | { |
0f735f52 | 196 | struct media_entity *me = &p->subdevs[IDX_SENSOR]->entity; |
d3953223 SN |
197 | int ret; |
198 | ||
199 | mutex_lock(&me->parent->graph_mutex); | |
0f735f52 | 200 | ret = __fimc_pipeline_shutdown(p); |
d3953223 SN |
201 | mutex_unlock(&me->parent->graph_mutex); |
202 | ||
203 | return ret; | |
204 | } | |
0f735f52 | 205 | EXPORT_SYMBOL_GPL(fimc_pipeline_shutdown); |
d3953223 SN |
206 | |
207 | /** | |
208 | * fimc_pipeline_s_stream - invoke s_stream on pipeline subdevs | |
0f735f52 | 209 | * @pipeline: video pipeline structure |
d3953223 SN |
210 | * @on: passed as the s_stream call argument |
211 | */ | |
0f735f52 | 212 | int fimc_pipeline_s_stream(struct fimc_pipeline *p, bool on) |
d3953223 | 213 | { |
0f735f52 | 214 | int i, ret; |
d3953223 | 215 | |
0f735f52 | 216 | if (p->subdevs[IDX_SENSOR] == NULL) |
d3953223 SN |
217 | return -ENODEV; |
218 | ||
0f735f52 SN |
219 | for (i = 0; i < IDX_MAX; i++) { |
220 | unsigned int idx = on ? (IDX_MAX - 1) - i : i; | |
221 | ||
222 | ret = v4l2_subdev_call(p->subdevs[idx], video, s_stream, on); | |
223 | ||
224 | if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV) | |
225 | return ret; | |
226 | } | |
227 | ||
228 | return 0; | |
229 | ||
d3953223 | 230 | } |
0f735f52 | 231 | EXPORT_SYMBOL_GPL(fimc_pipeline_s_stream); |
d3953223 SN |
232 | |
233 | /* | |
234 | * Sensor subdevice helper functions | |
235 | */ | |
236 | static struct v4l2_subdev *fimc_md_register_sensor(struct fimc_md *fmd, | |
237 | struct fimc_sensor_info *s_info) | |
238 | { | |
239 | struct i2c_adapter *adapter; | |
240 | struct v4l2_subdev *sd = NULL; | |
241 | ||
242 | if (!s_info || !fmd) | |
243 | return NULL; | |
244 | ||
245 | adapter = i2c_get_adapter(s_info->pdata->i2c_bus_num); | |
ecd9acbf SN |
246 | if (!adapter) { |
247 | v4l2_warn(&fmd->v4l2_dev, | |
248 | "Failed to get I2C adapter %d, deferring probe\n", | |
249 | s_info->pdata->i2c_bus_num); | |
250 | return ERR_PTR(-EPROBE_DEFER); | |
251 | } | |
d3953223 SN |
252 | sd = v4l2_i2c_new_subdev_board(&fmd->v4l2_dev, adapter, |
253 | s_info->pdata->board_info, NULL); | |
254 | if (IS_ERR_OR_NULL(sd)) { | |
7acde02a | 255 | i2c_put_adapter(adapter); |
ecd9acbf SN |
256 | v4l2_warn(&fmd->v4l2_dev, |
257 | "Failed to acquire subdev %s, deferring probe\n", | |
258 | s_info->pdata->board_info->type); | |
259 | return ERR_PTR(-EPROBE_DEFER); | |
d3953223 SN |
260 | } |
261 | v4l2_set_subdev_hostdata(sd, s_info); | |
262 | sd->grp_id = SENSOR_GROUP_ID; | |
263 | ||
264 | v4l2_info(&fmd->v4l2_dev, "Registered sensor subdevice %s\n", | |
265 | s_info->pdata->board_info->type); | |
266 | return sd; | |
267 | } | |
268 | ||
269 | static void fimc_md_unregister_sensor(struct v4l2_subdev *sd) | |
270 | { | |
271 | struct i2c_client *client = v4l2_get_subdevdata(sd); | |
7acde02a | 272 | struct i2c_adapter *adapter; |
d3953223 SN |
273 | |
274 | if (!client) | |
275 | return; | |
276 | v4l2_device_unregister_subdev(sd); | |
7acde02a | 277 | adapter = client->adapter; |
d3953223 | 278 | i2c_unregister_device(client); |
7acde02a SN |
279 | if (adapter) |
280 | i2c_put_adapter(adapter); | |
d3953223 SN |
281 | } |
282 | ||
283 | static int fimc_md_register_sensor_entities(struct fimc_md *fmd) | |
284 | { | |
285 | struct s5p_platform_fimc *pdata = fmd->pdev->dev.platform_data; | |
286 | struct fimc_dev *fd = NULL; | |
287 | int num_clients, ret, i; | |
288 | ||
289 | /* | |
290 | * Runtime resume one of the FIMC entities to make sure | |
291 | * the sclk_cam clocks are not globally disabled. | |
292 | */ | |
293 | for (i = 0; !fd && i < ARRAY_SIZE(fmd->fimc); i++) | |
294 | if (fmd->fimc[i]) | |
295 | fd = fmd->fimc[i]; | |
296 | if (!fd) | |
297 | return -ENXIO; | |
298 | ret = pm_runtime_get_sync(&fd->pdev->dev); | |
299 | if (ret < 0) | |
300 | return ret; | |
301 | ||
302 | WARN_ON(pdata->num_clients > ARRAY_SIZE(fmd->sensor)); | |
303 | num_clients = min_t(u32, pdata->num_clients, ARRAY_SIZE(fmd->sensor)); | |
304 | ||
305 | fmd->num_sensors = num_clients; | |
306 | for (i = 0; i < num_clients; i++) { | |
ecd9acbf SN |
307 | struct v4l2_subdev *sd; |
308 | ||
d3953223 SN |
309 | fmd->sensor[i].pdata = &pdata->isp_info[i]; |
310 | ret = __fimc_md_set_camclk(fmd, &fmd->sensor[i], true); | |
311 | if (ret) | |
312 | break; | |
ecd9acbf | 313 | sd = fimc_md_register_sensor(fmd, &fmd->sensor[i]); |
d3953223 | 314 | ret = __fimc_md_set_camclk(fmd, &fmd->sensor[i], false); |
ecd9acbf SN |
315 | |
316 | if (!IS_ERR(sd)) { | |
317 | fmd->sensor[i].subdev = sd; | |
318 | } else { | |
319 | fmd->sensor[i].subdev = NULL; | |
320 | ret = PTR_ERR(sd); | |
321 | break; | |
322 | } | |
d3953223 SN |
323 | if (ret) |
324 | break; | |
325 | } | |
326 | pm_runtime_put(&fd->pdev->dev); | |
327 | return ret; | |
328 | } | |
329 | ||
330 | /* | |
331 | * MIPI CSIS and FIMC platform devices registration. | |
332 | */ | |
333 | static int fimc_register_callback(struct device *dev, void *p) | |
334 | { | |
335 | struct fimc_dev *fimc = dev_get_drvdata(dev); | |
693f5c40 | 336 | struct v4l2_subdev *sd = &fimc->vid_cap.subdev; |
d3953223 | 337 | struct fimc_md *fmd = p; |
693f5c40 | 338 | int ret = 0; |
d3953223 SN |
339 | |
340 | if (!fimc || !fimc->pdev) | |
341 | return 0; | |
4af81310 | 342 | |
d3953223 SN |
343 | if (fimc->pdev->id < 0 || fimc->pdev->id >= FIMC_MAX_DEVS) |
344 | return 0; | |
345 | ||
346 | fmd->fimc[fimc->pdev->id] = fimc; | |
693f5c40 SN |
347 | sd->grp_id = FIMC_GROUP_ID; |
348 | ||
349 | ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd); | |
350 | if (ret) { | |
351 | v4l2_err(&fmd->v4l2_dev, "Failed to register FIMC.%d (%d)\n", | |
352 | fimc->id, ret); | |
353 | } | |
354 | ||
d3953223 SN |
355 | return ret; |
356 | } | |
357 | ||
4af81310 SN |
358 | static int fimc_lite_register_callback(struct device *dev, void *p) |
359 | { | |
360 | struct fimc_lite *fimc = dev_get_drvdata(dev); | |
361 | struct v4l2_subdev *sd = &fimc->subdev; | |
362 | struct fimc_md *fmd = p; | |
363 | int ret; | |
364 | ||
365 | if (fimc == NULL) | |
366 | return 0; | |
367 | ||
368 | if (fimc->index >= FIMC_LITE_MAX_DEVS) | |
369 | return 0; | |
370 | ||
371 | fmd->fimc_lite[fimc->index] = fimc; | |
372 | sd->grp_id = FLITE_GROUP_ID; | |
373 | ||
374 | ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd); | |
375 | if (ret) { | |
376 | v4l2_err(&fmd->v4l2_dev, | |
377 | "Failed to register FIMC-LITE.%d (%d)\n", | |
378 | fimc->index, ret); | |
379 | } | |
380 | return ret; | |
381 | } | |
382 | ||
d3953223 SN |
383 | static int csis_register_callback(struct device *dev, void *p) |
384 | { | |
385 | struct v4l2_subdev *sd = dev_get_drvdata(dev); | |
386 | struct platform_device *pdev; | |
387 | struct fimc_md *fmd = p; | |
388 | int id, ret; | |
389 | ||
390 | if (!sd) | |
391 | return 0; | |
392 | pdev = v4l2_get_subdevdata(sd); | |
393 | if (!pdev || pdev->id < 0 || pdev->id >= CSIS_MAX_ENTITIES) | |
394 | return 0; | |
395 | v4l2_info(sd, "csis%d sd: %s\n", pdev->id, sd->name); | |
396 | ||
397 | id = pdev->id < 0 ? 0 : pdev->id; | |
398 | fmd->csis[id].sd = sd; | |
399 | sd->grp_id = CSIS_GROUP_ID; | |
400 | ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd); | |
401 | if (ret) | |
402 | v4l2_err(&fmd->v4l2_dev, | |
403 | "Failed to register CSIS subdevice: %d\n", ret); | |
404 | return ret; | |
405 | } | |
406 | ||
407 | /** | |
408 | * fimc_md_register_platform_entities - register FIMC and CSIS media entities | |
409 | */ | |
410 | static int fimc_md_register_platform_entities(struct fimc_md *fmd) | |
411 | { | |
ecd9acbf | 412 | struct s5p_platform_fimc *pdata = fmd->pdev->dev.platform_data; |
d3953223 | 413 | struct device_driver *driver; |
ecd9acbf | 414 | int ret, i; |
d3953223 SN |
415 | |
416 | driver = driver_find(FIMC_MODULE_NAME, &platform_bus_type); | |
ecd9acbf SN |
417 | if (!driver) { |
418 | v4l2_warn(&fmd->v4l2_dev, | |
419 | "%s driver not found, deffering probe\n", | |
420 | FIMC_MODULE_NAME); | |
421 | return -EPROBE_DEFER; | |
422 | } | |
423 | ||
d3953223 SN |
424 | ret = driver_for_each_device(driver, NULL, fmd, |
425 | fimc_register_callback); | |
d3953223 SN |
426 | if (ret) |
427 | return ret; | |
4af81310 SN |
428 | |
429 | driver = driver_find(FIMC_LITE_DRV_NAME, &platform_bus_type); | |
430 | if (driver && try_module_get(driver->owner)) { | |
431 | ret = driver_for_each_device(driver, NULL, fmd, | |
432 | fimc_lite_register_callback); | |
433 | if (ret) | |
434 | return ret; | |
435 | module_put(driver->owner); | |
436 | } | |
ecd9acbf SN |
437 | /* |
438 | * Check if there is any sensor on the MIPI-CSI2 bus and | |
439 | * if not skip the s5p-csis module loading. | |
440 | */ | |
41df5bf0 SN |
441 | if (pdata == NULL) |
442 | return 0; | |
ecd9acbf SN |
443 | for (i = 0; i < pdata->num_clients; i++) { |
444 | if (pdata->isp_info[i].bus_type == FIMC_MIPI_CSI2) { | |
445 | ret = 1; | |
446 | break; | |
447 | } | |
448 | } | |
449 | if (!ret) | |
450 | return 0; | |
d3953223 SN |
451 | |
452 | driver = driver_find(CSIS_DRIVER_NAME, &platform_bus_type); | |
ecd9acbf SN |
453 | if (!driver || !try_module_get(driver->owner)) { |
454 | v4l2_warn(&fmd->v4l2_dev, | |
455 | "%s driver not found, deffering probe\n", | |
456 | CSIS_DRIVER_NAME); | |
457 | return -EPROBE_DEFER; | |
458 | } | |
459 | ||
460 | return driver_for_each_device(driver, NULL, fmd, | |
461 | csis_register_callback); | |
d3953223 SN |
462 | } |
463 | ||
464 | static void fimc_md_unregister_entities(struct fimc_md *fmd) | |
465 | { | |
466 | int i; | |
467 | ||
468 | for (i = 0; i < FIMC_MAX_DEVS; i++) { | |
469 | if (fmd->fimc[i] == NULL) | |
470 | continue; | |
693f5c40 | 471 | v4l2_device_unregister_subdev(&fmd->fimc[i]->vid_cap.subdev); |
d3953223 SN |
472 | fmd->fimc[i] = NULL; |
473 | } | |
4af81310 SN |
474 | for (i = 0; i < FIMC_LITE_MAX_DEVS; i++) { |
475 | if (fmd->fimc_lite[i] == NULL) | |
476 | continue; | |
477 | v4l2_device_unregister_subdev(&fmd->fimc_lite[i]->subdev); | |
478 | fmd->fimc_lite[i] = NULL; | |
479 | } | |
d3953223 SN |
480 | for (i = 0; i < CSIS_MAX_ENTITIES; i++) { |
481 | if (fmd->csis[i].sd == NULL) | |
482 | continue; | |
483 | v4l2_device_unregister_subdev(fmd->csis[i].sd); | |
ecd9acbf | 484 | module_put(fmd->csis[i].sd->owner); |
d3953223 SN |
485 | fmd->csis[i].sd = NULL; |
486 | } | |
487 | for (i = 0; i < fmd->num_sensors; i++) { | |
488 | if (fmd->sensor[i].subdev == NULL) | |
489 | continue; | |
490 | fimc_md_unregister_sensor(fmd->sensor[i].subdev); | |
491 | fmd->sensor[i].subdev = NULL; | |
492 | } | |
493 | } | |
494 | ||
d3953223 SN |
495 | /** |
496 | * __fimc_md_create_fimc_links - create links to all FIMC entities | |
497 | * @fmd: fimc media device | |
498 | * @source: the source entity to create links to all fimc entities from | |
499 | * @sensor: sensor subdev linked to FIMC[fimc_id] entity, may be null | |
500 | * @pad: the source entity pad index | |
501 | * @fimc_id: index of the fimc device for which link should be enabled | |
502 | */ | |
4af81310 SN |
503 | static int __fimc_md_create_fimc_sink_links(struct fimc_md *fmd, |
504 | struct media_entity *source, | |
505 | struct v4l2_subdev *sensor, | |
506 | int pad, int fimc_id) | |
d3953223 SN |
507 | { |
508 | struct fimc_sensor_info *s_info; | |
509 | struct media_entity *sink; | |
4af81310 | 510 | unsigned int flags = 0; |
237e0265 | 511 | int ret, i; |
d3953223 SN |
512 | |
513 | for (i = 0; i < FIMC_MAX_DEVS; i++) { | |
514 | if (!fmd->fimc[i]) | |
4af81310 | 515 | continue; |
d3953223 SN |
516 | /* |
517 | * Some FIMC variants are not fitted with camera capture | |
518 | * interface. Skip creating a link from sensor for those. | |
519 | */ | |
4af81310 | 520 | if (!fmd->fimc[i]->variant->has_cam_if) |
d3953223 SN |
521 | continue; |
522 | ||
523 | flags = (i == fimc_id) ? MEDIA_LNK_FL_ENABLED : 0; | |
4af81310 | 524 | |
693f5c40 | 525 | sink = &fmd->fimc[i]->vid_cap.subdev.entity; |
237e0265 SN |
526 | ret = media_entity_create_link(source, pad, sink, |
527 | FIMC_SD_PAD_SINK, flags); | |
d3953223 SN |
528 | if (ret) |
529 | return ret; | |
530 | ||
237e0265 SN |
531 | /* Notify FIMC capture subdev entity */ |
532 | ret = media_entity_call(sink, link_setup, &sink->pads[0], | |
533 | &source->pads[pad], flags); | |
534 | if (ret) | |
535 | break; | |
536 | ||
d3953223 SN |
537 | v4l2_info(&fmd->v4l2_dev, "created link [%s] %c> [%s]", |
538 | source->name, flags ? '=' : '-', sink->name); | |
539 | ||
4af81310 | 540 | if (flags == 0 || sensor == NULL) |
d3953223 SN |
541 | continue; |
542 | s_info = v4l2_get_subdev_hostdata(sensor); | |
543 | if (!WARN_ON(s_info == NULL)) { | |
544 | unsigned long irq_flags; | |
545 | spin_lock_irqsave(&fmd->slock, irq_flags); | |
546 | s_info->host = fmd->fimc[i]; | |
547 | spin_unlock_irqrestore(&fmd->slock, irq_flags); | |
548 | } | |
549 | } | |
4af81310 SN |
550 | |
551 | for (i = 0; i < FIMC_LITE_MAX_DEVS; i++) { | |
552 | if (!fmd->fimc_lite[i]) | |
553 | continue; | |
554 | ||
555 | flags = (i == fimc_id) ? MEDIA_LNK_FL_ENABLED : 0; | |
556 | ||
557 | sink = &fmd->fimc_lite[i]->subdev.entity; | |
558 | ret = media_entity_create_link(source, pad, sink, | |
559 | FLITE_SD_PAD_SINK, flags); | |
560 | if (ret) | |
561 | return ret; | |
562 | ||
563 | /* Notify FIMC-LITE subdev entity */ | |
564 | ret = media_entity_call(sink, link_setup, &sink->pads[0], | |
565 | &source->pads[pad], flags); | |
566 | if (ret) | |
567 | break; | |
568 | ||
569 | v4l2_info(&fmd->v4l2_dev, "created link [%s] %c> [%s]", | |
570 | source->name, flags ? '=' : '-', sink->name); | |
571 | } | |
d3953223 SN |
572 | return 0; |
573 | } | |
574 | ||
4af81310 SN |
575 | /* Create links from FIMC-LITE source pads to other entities */ |
576 | static int __fimc_md_create_flite_source_links(struct fimc_md *fmd) | |
577 | { | |
578 | struct media_entity *source, *sink; | |
579 | unsigned int flags = MEDIA_LNK_FL_ENABLED; | |
580 | int i, ret; | |
581 | ||
582 | for (i = 0; i < FIMC_LITE_MAX_DEVS; i++) { | |
583 | struct fimc_lite *fimc = fmd->fimc_lite[i]; | |
584 | if (fimc == NULL) | |
585 | continue; | |
586 | source = &fimc->subdev.entity; | |
587 | sink = &fimc->vfd->entity; | |
588 | /* FIMC-LITE's subdev and video node */ | |
589 | ret = media_entity_create_link(source, FIMC_SD_PAD_SOURCE, | |
590 | sink, 0, flags); | |
591 | if (ret) | |
592 | break; | |
593 | /* TODO: create links to other entities */ | |
594 | } | |
595 | ||
596 | return ret; | |
597 | } | |
598 | ||
d3953223 SN |
599 | /** |
600 | * fimc_md_create_links - create default links between registered entities | |
601 | * | |
602 | * Parallel interface sensor entities are connected directly to FIMC capture | |
603 | * entities. The sensors using MIPI CSIS bus are connected through immutable | |
604 | * link with CSI receiver entity specified by mux_id. Any registered CSIS | |
605 | * entity has a link to each registered FIMC capture entity. Enabled links | |
606 | * are created by default between each subsequent registered sensor and | |
607 | * subsequent FIMC capture entity. The number of default active links is | |
608 | * determined by the number of available sensors or FIMC entities, | |
609 | * whichever is less. | |
610 | */ | |
611 | static int fimc_md_create_links(struct fimc_md *fmd) | |
612 | { | |
613 | struct v4l2_subdev *sensor, *csis; | |
614 | struct s5p_fimc_isp_info *pdata; | |
615 | struct fimc_sensor_info *s_info; | |
237e0265 SN |
616 | struct media_entity *source, *sink; |
617 | int i, pad, fimc_id = 0; | |
d3953223 | 618 | int ret = 0; |
237e0265 | 619 | u32 flags; |
d3953223 SN |
620 | |
621 | for (i = 0; i < fmd->num_sensors; i++) { | |
622 | if (fmd->sensor[i].subdev == NULL) | |
623 | continue; | |
624 | ||
625 | sensor = fmd->sensor[i].subdev; | |
626 | s_info = v4l2_get_subdev_hostdata(sensor); | |
627 | if (!s_info || !s_info->pdata) | |
628 | continue; | |
629 | ||
630 | source = NULL; | |
631 | pdata = s_info->pdata; | |
632 | ||
633 | switch (pdata->bus_type) { | |
634 | case FIMC_MIPI_CSI2: | |
635 | if (WARN(pdata->mux_id >= CSIS_MAX_ENTITIES, | |
636 | "Wrong CSI channel id: %d\n", pdata->mux_id)) | |
637 | return -EINVAL; | |
638 | ||
639 | csis = fmd->csis[pdata->mux_id].sd; | |
640 | if (WARN(csis == NULL, | |
641 | "MIPI-CSI interface specified " | |
642 | "but s5p-csis module is not loaded!\n")) | |
d12392ec | 643 | return -EINVAL; |
d3953223 SN |
644 | |
645 | ret = media_entity_create_link(&sensor->entity, 0, | |
646 | &csis->entity, CSIS_PAD_SINK, | |
647 | MEDIA_LNK_FL_IMMUTABLE | | |
648 | MEDIA_LNK_FL_ENABLED); | |
649 | if (ret) | |
650 | return ret; | |
651 | ||
652 | v4l2_info(&fmd->v4l2_dev, "created link [%s] => [%s]", | |
653 | sensor->entity.name, csis->entity.name); | |
654 | ||
4af81310 | 655 | source = NULL; |
d3953223 SN |
656 | break; |
657 | ||
658 | case FIMC_ITU_601...FIMC_ITU_656: | |
659 | source = &sensor->entity; | |
660 | pad = 0; | |
661 | break; | |
662 | ||
663 | default: | |
664 | v4l2_err(&fmd->v4l2_dev, "Wrong bus_type: %x\n", | |
665 | pdata->bus_type); | |
666 | return -EINVAL; | |
667 | } | |
668 | if (source == NULL) | |
669 | continue; | |
670 | ||
4af81310 SN |
671 | ret = __fimc_md_create_fimc_sink_links(fmd, source, sensor, |
672 | pad, fimc_id++); | |
673 | } | |
674 | ||
675 | fimc_id = 0; | |
676 | for (i = 0; i < ARRAY_SIZE(fmd->csis); i++) { | |
677 | if (fmd->csis[i].sd == NULL) | |
678 | continue; | |
679 | source = &fmd->csis[i].sd->entity; | |
680 | pad = CSIS_PAD_SOURCE; | |
681 | ||
682 | ret = __fimc_md_create_fimc_sink_links(fmd, source, NULL, | |
683 | pad, fimc_id++); | |
d3953223 | 684 | } |
4af81310 | 685 | |
237e0265 SN |
686 | /* Create immutable links between each FIMC's subdev and video node */ |
687 | flags = MEDIA_LNK_FL_IMMUTABLE | MEDIA_LNK_FL_ENABLED; | |
688 | for (i = 0; i < FIMC_MAX_DEVS; i++) { | |
689 | if (!fmd->fimc[i]) | |
690 | continue; | |
693f5c40 | 691 | source = &fmd->fimc[i]->vid_cap.subdev.entity; |
237e0265 SN |
692 | sink = &fmd->fimc[i]->vid_cap.vfd->entity; |
693 | ret = media_entity_create_link(source, FIMC_SD_PAD_SOURCE, | |
694 | sink, 0, flags); | |
695 | if (ret) | |
696 | break; | |
697 | } | |
698 | ||
4af81310 | 699 | return __fimc_md_create_flite_source_links(fmd); |
d3953223 SN |
700 | } |
701 | ||
702 | /* | |
703 | * The peripheral sensor clock management. | |
704 | */ | |
705 | static int fimc_md_get_clocks(struct fimc_md *fmd) | |
706 | { | |
707 | char clk_name[32]; | |
708 | struct clk *clock; | |
709 | int i; | |
710 | ||
711 | for (i = 0; i < FIMC_MAX_CAMCLKS; i++) { | |
712 | snprintf(clk_name, sizeof(clk_name), "sclk_cam%u", i); | |
713 | clock = clk_get(NULL, clk_name); | |
714 | if (IS_ERR_OR_NULL(clock)) { | |
715 | v4l2_err(&fmd->v4l2_dev, "Failed to get clock: %s", | |
716 | clk_name); | |
717 | return -ENXIO; | |
718 | } | |
719 | fmd->camclk[i].clock = clock; | |
720 | } | |
721 | return 0; | |
722 | } | |
723 | ||
724 | static void fimc_md_put_clocks(struct fimc_md *fmd) | |
725 | { | |
726 | int i = FIMC_MAX_CAMCLKS; | |
727 | ||
728 | while (--i >= 0) { | |
729 | if (IS_ERR_OR_NULL(fmd->camclk[i].clock)) | |
730 | continue; | |
731 | clk_put(fmd->camclk[i].clock); | |
732 | fmd->camclk[i].clock = NULL; | |
733 | } | |
734 | } | |
735 | ||
736 | static int __fimc_md_set_camclk(struct fimc_md *fmd, | |
737 | struct fimc_sensor_info *s_info, | |
738 | bool on) | |
739 | { | |
740 | struct s5p_fimc_isp_info *pdata = s_info->pdata; | |
741 | struct fimc_camclk_info *camclk; | |
742 | int ret = 0; | |
743 | ||
744 | if (WARN_ON(pdata->clk_id >= FIMC_MAX_CAMCLKS) || fmd == NULL) | |
745 | return -EINVAL; | |
746 | ||
747 | if (s_info->clk_on == on) | |
748 | return 0; | |
749 | camclk = &fmd->camclk[pdata->clk_id]; | |
750 | ||
751 | dbg("camclk %d, f: %lu, clk: %p, on: %d", | |
752 | pdata->clk_id, pdata->clk_frequency, camclk, on); | |
753 | ||
754 | if (on) { | |
755 | if (camclk->use_count > 0 && | |
756 | camclk->frequency != pdata->clk_frequency) | |
757 | return -EINVAL; | |
758 | ||
759 | if (camclk->use_count++ == 0) { | |
760 | clk_set_rate(camclk->clock, pdata->clk_frequency); | |
761 | camclk->frequency = pdata->clk_frequency; | |
762 | ret = clk_enable(camclk->clock); | |
763 | } | |
764 | s_info->clk_on = 1; | |
765 | dbg("Enabled camclk %d: f: %lu", pdata->clk_id, | |
766 | clk_get_rate(camclk->clock)); | |
767 | ||
768 | return ret; | |
769 | } | |
770 | ||
771 | if (WARN_ON(camclk->use_count == 0)) | |
772 | return 0; | |
773 | ||
774 | if (--camclk->use_count == 0) { | |
775 | clk_disable(camclk->clock); | |
776 | s_info->clk_on = 0; | |
777 | dbg("Disabled camclk %d", pdata->clk_id); | |
778 | } | |
779 | return ret; | |
780 | } | |
781 | ||
782 | /** | |
783 | * fimc_md_set_camclk - peripheral sensor clock setup | |
784 | * @sd: sensor subdev to configure sclk_cam clock for | |
785 | * @on: 1 to enable or 0 to disable the clock | |
786 | * | |
787 | * There are 2 separate clock outputs available in the SoC for external | |
788 | * image processors. These clocks are shared between all registered FIMC | |
789 | * devices to which sensors can be attached, either directly or through | |
790 | * the MIPI CSI receiver. The clock is allowed here to be used by | |
791 | * multiple sensors concurrently if they use same frequency. | |
792 | * The per sensor subdev clk_on attribute helps to synchronize accesses | |
793 | * to the sclk_cam clocks from the video and media device nodes. | |
794 | * This function should only be called when the graph mutex is held. | |
795 | */ | |
796 | int fimc_md_set_camclk(struct v4l2_subdev *sd, bool on) | |
797 | { | |
798 | struct fimc_sensor_info *s_info = v4l2_get_subdev_hostdata(sd); | |
799 | struct fimc_md *fmd = entity_to_fimc_mdev(&sd->entity); | |
800 | ||
801 | return __fimc_md_set_camclk(fmd, s_info, on); | |
802 | } | |
803 | ||
804 | static int fimc_md_link_notify(struct media_pad *source, | |
805 | struct media_pad *sink, u32 flags) | |
806 | { | |
4af81310 SN |
807 | struct fimc_lite *fimc_lite = NULL; |
808 | struct fimc_dev *fimc = NULL; | |
0f735f52 | 809 | struct fimc_pipeline *pipeline; |
237e0265 | 810 | struct v4l2_subdev *sd; |
d3953223 SN |
811 | int ret = 0; |
812 | ||
237e0265 | 813 | if (media_entity_type(sink->entity) != MEDIA_ENT_T_V4L2_SUBDEV) |
d3953223 SN |
814 | return 0; |
815 | ||
237e0265 | 816 | sd = media_entity_to_v4l2_subdev(sink->entity); |
d3953223 | 817 | |
0f735f52 | 818 | switch (sd->grp_id) { |
4af81310 SN |
819 | case FLITE_GROUP_ID: |
820 | fimc_lite = v4l2_get_subdevdata(sd); | |
821 | pipeline = &fimc_lite->pipeline; | |
822 | break; | |
0f735f52 SN |
823 | case FIMC_GROUP_ID: |
824 | fimc = v4l2_get_subdevdata(sd); | |
825 | pipeline = &fimc->pipeline; | |
826 | break; | |
827 | default: | |
828 | return 0; | |
829 | } | |
131b6c61 | 830 | |
0f735f52 SN |
831 | if (!(flags & MEDIA_LNK_FL_ENABLED)) { |
832 | ret = __fimc_pipeline_shutdown(pipeline); | |
833 | pipeline->subdevs[IDX_SENSOR] = NULL; | |
834 | pipeline->subdevs[IDX_CSIS] = NULL; | |
835 | ||
836 | if (fimc) { | |
837 | mutex_lock(&fimc->lock); | |
838 | fimc_ctrls_delete(fimc->vid_cap.ctx); | |
839 | mutex_unlock(&fimc->lock); | |
840 | } | |
d3953223 SN |
841 | return ret; |
842 | } | |
843 | /* | |
844 | * Link activation. Enable power of pipeline elements only if the | |
845 | * pipeline is already in use, i.e. its video node is opened. | |
131b6c61 | 846 | * Recreate the controls destroyed during the link deactivation. |
d3953223 | 847 | */ |
4af81310 SN |
848 | if (fimc) { |
849 | mutex_lock(&fimc->lock); | |
850 | if (fimc->vid_cap.refcnt > 0) { | |
0f735f52 SN |
851 | ret = __fimc_pipeline_initialize(pipeline, |
852 | source->entity, true); | |
131b6c61 SN |
853 | if (!ret) |
854 | ret = fimc_capture_ctrls_create(fimc); | |
4af81310 SN |
855 | } |
856 | mutex_unlock(&fimc->lock); | |
857 | } else { | |
858 | mutex_lock(&fimc_lite->lock); | |
859 | if (fimc_lite->ref_count > 0) { | |
860 | ret = __fimc_pipeline_initialize(pipeline, | |
861 | source->entity, true); | |
862 | } | |
863 | mutex_unlock(&fimc_lite->lock); | |
131b6c61 | 864 | } |
d3953223 SN |
865 | return ret ? -EPIPE : ret; |
866 | } | |
867 | ||
868 | static ssize_t fimc_md_sysfs_show(struct device *dev, | |
869 | struct device_attribute *attr, char *buf) | |
870 | { | |
871 | struct platform_device *pdev = to_platform_device(dev); | |
872 | struct fimc_md *fmd = platform_get_drvdata(pdev); | |
873 | ||
874 | if (fmd->user_subdev_api) | |
875 | return strlcpy(buf, "Sub-device API (sub-dev)\n", PAGE_SIZE); | |
876 | ||
877 | return strlcpy(buf, "V4L2 video node only API (vid-dev)\n", PAGE_SIZE); | |
878 | } | |
879 | ||
880 | static ssize_t fimc_md_sysfs_store(struct device *dev, | |
881 | struct device_attribute *attr, | |
882 | const char *buf, size_t count) | |
883 | { | |
884 | struct platform_device *pdev = to_platform_device(dev); | |
885 | struct fimc_md *fmd = platform_get_drvdata(pdev); | |
886 | bool subdev_api; | |
887 | int i; | |
888 | ||
889 | if (!strcmp(buf, "vid-dev\n")) | |
890 | subdev_api = false; | |
891 | else if (!strcmp(buf, "sub-dev\n")) | |
892 | subdev_api = true; | |
893 | else | |
894 | return count; | |
895 | ||
896 | fmd->user_subdev_api = subdev_api; | |
897 | for (i = 0; i < FIMC_MAX_DEVS; i++) | |
898 | if (fmd->fimc[i]) | |
899 | fmd->fimc[i]->vid_cap.user_subdev_api = subdev_api; | |
900 | return count; | |
901 | } | |
902 | /* | |
903 | * This device attribute is to select video pipeline configuration method. | |
904 | * There are following valid values: | |
905 | * vid-dev - for V4L2 video node API only, subdevice will be configured | |
906 | * by the host driver. | |
907 | * sub-dev - for media controller API, subdevs must be configured in user | |
908 | * space before starting streaming. | |
909 | */ | |
910 | static DEVICE_ATTR(subdev_conf_mode, S_IWUSR | S_IRUGO, | |
911 | fimc_md_sysfs_show, fimc_md_sysfs_store); | |
912 | ||
ecd9acbf | 913 | static int fimc_md_probe(struct platform_device *pdev) |
d3953223 SN |
914 | { |
915 | struct v4l2_device *v4l2_dev; | |
916 | struct fimc_md *fmd; | |
917 | int ret; | |
918 | ||
6d91a51a | 919 | fmd = devm_kzalloc(&pdev->dev, sizeof(*fmd), GFP_KERNEL); |
d3953223 SN |
920 | if (!fmd) |
921 | return -ENOMEM; | |
922 | ||
923 | spin_lock_init(&fmd->slock); | |
924 | fmd->pdev = pdev; | |
925 | ||
926 | strlcpy(fmd->media_dev.model, "SAMSUNG S5P FIMC", | |
927 | sizeof(fmd->media_dev.model)); | |
928 | fmd->media_dev.link_notify = fimc_md_link_notify; | |
929 | fmd->media_dev.dev = &pdev->dev; | |
930 | ||
931 | v4l2_dev = &fmd->v4l2_dev; | |
932 | v4l2_dev->mdev = &fmd->media_dev; | |
e1d72f4d | 933 | v4l2_dev->notify = fimc_sensor_notify; |
d3953223 SN |
934 | snprintf(v4l2_dev->name, sizeof(v4l2_dev->name), "%s", |
935 | dev_name(&pdev->dev)); | |
936 | ||
937 | ret = v4l2_device_register(&pdev->dev, &fmd->v4l2_dev); | |
938 | if (ret < 0) { | |
939 | v4l2_err(v4l2_dev, "Failed to register v4l2_device: %d\n", ret); | |
6d91a51a | 940 | return ret; |
d3953223 SN |
941 | } |
942 | ret = media_device_register(&fmd->media_dev); | |
943 | if (ret < 0) { | |
944 | v4l2_err(v4l2_dev, "Failed to register media device: %d\n", ret); | |
693f5c40 | 945 | goto err_md; |
d3953223 SN |
946 | } |
947 | ret = fimc_md_get_clocks(fmd); | |
948 | if (ret) | |
693f5c40 | 949 | goto err_clk; |
d3953223 SN |
950 | |
951 | fmd->user_subdev_api = false; | |
693f5c40 SN |
952 | |
953 | /* Protect the media graph while we're registering entities */ | |
954 | mutex_lock(&fmd->media_dev.graph_mutex); | |
955 | ||
d3953223 SN |
956 | ret = fimc_md_register_platform_entities(fmd); |
957 | if (ret) | |
693f5c40 | 958 | goto err_unlock; |
d3953223 | 959 | |
5cbf6f16 SN |
960 | if (pdev->dev.platform_data) { |
961 | ret = fimc_md_register_sensor_entities(fmd); | |
962 | if (ret) | |
693f5c40 | 963 | goto err_unlock; |
5cbf6f16 | 964 | } |
d3953223 SN |
965 | ret = fimc_md_create_links(fmd); |
966 | if (ret) | |
693f5c40 | 967 | goto err_unlock; |
d3953223 SN |
968 | ret = v4l2_device_register_subdev_nodes(&fmd->v4l2_dev); |
969 | if (ret) | |
693f5c40 | 970 | goto err_unlock; |
d3953223 SN |
971 | |
972 | ret = device_create_file(&pdev->dev, &dev_attr_subdev_conf_mode); | |
693f5c40 SN |
973 | if (ret) |
974 | goto err_unlock; | |
975 | ||
976 | platform_set_drvdata(pdev, fmd); | |
977 | mutex_unlock(&fmd->media_dev.graph_mutex); | |
978 | return 0; | |
979 | ||
980 | err_unlock: | |
981 | mutex_unlock(&fmd->media_dev.graph_mutex); | |
982 | err_clk: | |
d3953223 SN |
983 | media_device_unregister(&fmd->media_dev); |
984 | fimc_md_put_clocks(fmd); | |
985 | fimc_md_unregister_entities(fmd); | |
693f5c40 | 986 | err_md: |
d3953223 | 987 | v4l2_device_unregister(&fmd->v4l2_dev); |
d3953223 SN |
988 | return ret; |
989 | } | |
990 | ||
991 | static int __devexit fimc_md_remove(struct platform_device *pdev) | |
992 | { | |
993 | struct fimc_md *fmd = platform_get_drvdata(pdev); | |
994 | ||
995 | if (!fmd) | |
996 | return 0; | |
997 | device_remove_file(&pdev->dev, &dev_attr_subdev_conf_mode); | |
998 | fimc_md_unregister_entities(fmd); | |
999 | media_device_unregister(&fmd->media_dev); | |
1000 | fimc_md_put_clocks(fmd); | |
d3953223 SN |
1001 | return 0; |
1002 | } | |
1003 | ||
1004 | static struct platform_driver fimc_md_driver = { | |
1005 | .probe = fimc_md_probe, | |
1006 | .remove = __devexit_p(fimc_md_remove), | |
1007 | .driver = { | |
1008 | .name = "s5p-fimc-md", | |
1009 | .owner = THIS_MODULE, | |
1010 | } | |
1011 | }; | |
1012 | ||
1013 | int __init fimc_md_init(void) | |
1014 | { | |
1015 | int ret; | |
ecd9acbf | 1016 | |
d3953223 SN |
1017 | request_module("s5p-csis"); |
1018 | ret = fimc_register_driver(); | |
1019 | if (ret) | |
1020 | return ret; | |
ecd9acbf | 1021 | |
d3953223 SN |
1022 | return platform_driver_register(&fimc_md_driver); |
1023 | } | |
1024 | void __exit fimc_md_exit(void) | |
1025 | { | |
1026 | platform_driver_unregister(&fimc_md_driver); | |
1027 | fimc_unregister_driver(); | |
1028 | } | |
1029 | ||
1030 | module_init(fimc_md_init); | |
1031 | module_exit(fimc_md_exit); | |
1032 | ||
1033 | MODULE_AUTHOR("Sylwester Nawrocki <s.nawrocki@samsung.com>"); | |
1034 | MODULE_DESCRIPTION("S5P FIMC camera host interface/video postprocessor driver"); | |
1035 | MODULE_LICENSE("GPL"); | |
1036 | MODULE_VERSION("2.0.1"); |