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Merge remote-tracking branches 'spi/fix/ep93xx', 'spi/fix/rockchip', 'spi/fix/sunxi...
[deliverable/linux.git] / drivers / media / platform / exynos4-is / fimc-lite.c
1 /*
2 * Samsung EXYNOS FIMC-LITE (camera host interface) driver
3 *
4 * Copyright (C) 2012 - 2013 Samsung Electronics Co., Ltd.
5 * Author: 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 version 2 as
9 * published by the Free Software Foundation.
10 */
11 #define pr_fmt(fmt) "%s:%d " fmt, __func__, __LINE__
12
13 #include <linux/bug.h>
14 #include <linux/clk.h>
15 #include <linux/device.h>
16 #include <linux/errno.h>
17 #include <linux/interrupt.h>
18 #include <linux/kernel.h>
19 #include <linux/list.h>
20 #include <linux/module.h>
21 #include <linux/of.h>
22 #include <linux/types.h>
23 #include <linux/platform_device.h>
24 #include <linux/pm_runtime.h>
25 #include <linux/slab.h>
26 #include <linux/videodev2.h>
27
28 #include <media/v4l2-device.h>
29 #include <media/v4l2-ioctl.h>
30 #include <media/v4l2-mem2mem.h>
31 #include <media/videobuf2-v4l2.h>
32 #include <media/videobuf2-dma-contig.h>
33 #include <media/drv-intf/exynos-fimc.h>
34
35 #include "common.h"
36 #include "fimc-core.h"
37 #include "fimc-lite.h"
38 #include "fimc-lite-reg.h"
39
40 static int debug;
41 module_param(debug, int, 0644);
42
43 static const struct fimc_fmt fimc_lite_formats[] = {
44 {
45 .name = "YUV 4:2:2 packed, YCbYCr",
46 .fourcc = V4L2_PIX_FMT_YUYV,
47 .colorspace = V4L2_COLORSPACE_JPEG,
48 .depth = { 16 },
49 .color = FIMC_FMT_YCBYCR422,
50 .memplanes = 1,
51 .mbus_code = MEDIA_BUS_FMT_YUYV8_2X8,
52 .flags = FMT_FLAGS_YUV,
53 }, {
54 .name = "YUV 4:2:2 packed, CbYCrY",
55 .fourcc = V4L2_PIX_FMT_UYVY,
56 .colorspace = V4L2_COLORSPACE_JPEG,
57 .depth = { 16 },
58 .color = FIMC_FMT_CBYCRY422,
59 .memplanes = 1,
60 .mbus_code = MEDIA_BUS_FMT_UYVY8_2X8,
61 .flags = FMT_FLAGS_YUV,
62 }, {
63 .name = "YUV 4:2:2 packed, CrYCbY",
64 .fourcc = V4L2_PIX_FMT_VYUY,
65 .colorspace = V4L2_COLORSPACE_JPEG,
66 .depth = { 16 },
67 .color = FIMC_FMT_CRYCBY422,
68 .memplanes = 1,
69 .mbus_code = MEDIA_BUS_FMT_VYUY8_2X8,
70 .flags = FMT_FLAGS_YUV,
71 }, {
72 .name = "YUV 4:2:2 packed, YCrYCb",
73 .fourcc = V4L2_PIX_FMT_YVYU,
74 .colorspace = V4L2_COLORSPACE_JPEG,
75 .depth = { 16 },
76 .color = FIMC_FMT_YCRYCB422,
77 .memplanes = 1,
78 .mbus_code = MEDIA_BUS_FMT_YVYU8_2X8,
79 .flags = FMT_FLAGS_YUV,
80 }, {
81 .name = "RAW8 (GRBG)",
82 .fourcc = V4L2_PIX_FMT_SGRBG8,
83 .colorspace = V4L2_COLORSPACE_SRGB,
84 .depth = { 8 },
85 .color = FIMC_FMT_RAW8,
86 .memplanes = 1,
87 .mbus_code = MEDIA_BUS_FMT_SGRBG8_1X8,
88 .flags = FMT_FLAGS_RAW_BAYER,
89 }, {
90 .name = "RAW10 (GRBG)",
91 .fourcc = V4L2_PIX_FMT_SGRBG10,
92 .colorspace = V4L2_COLORSPACE_SRGB,
93 .depth = { 16 },
94 .color = FIMC_FMT_RAW10,
95 .memplanes = 1,
96 .mbus_code = MEDIA_BUS_FMT_SGRBG10_1X10,
97 .flags = FMT_FLAGS_RAW_BAYER,
98 }, {
99 .name = "RAW12 (GRBG)",
100 .fourcc = V4L2_PIX_FMT_SGRBG12,
101 .colorspace = V4L2_COLORSPACE_SRGB,
102 .depth = { 16 },
103 .color = FIMC_FMT_RAW12,
104 .memplanes = 1,
105 .mbus_code = MEDIA_BUS_FMT_SGRBG12_1X12,
106 .flags = FMT_FLAGS_RAW_BAYER,
107 },
108 };
109
110 /**
111 * fimc_lite_find_format - lookup fimc color format by fourcc or media bus code
112 * @pixelformat: fourcc to match, ignored if null
113 * @mbus_code: media bus code to match, ignored if null
114 * @mask: the color format flags to match
115 * @index: index to the fimc_lite_formats array, ignored if negative
116 */
117 static const struct fimc_fmt *fimc_lite_find_format(const u32 *pixelformat,
118 const u32 *mbus_code, unsigned int mask, int index)
119 {
120 const struct fimc_fmt *fmt, *def_fmt = NULL;
121 unsigned int i;
122 int id = 0;
123
124 if (index >= (int)ARRAY_SIZE(fimc_lite_formats))
125 return NULL;
126
127 for (i = 0; i < ARRAY_SIZE(fimc_lite_formats); ++i) {
128 fmt = &fimc_lite_formats[i];
129 if (mask && !(fmt->flags & mask))
130 continue;
131 if (pixelformat && fmt->fourcc == *pixelformat)
132 return fmt;
133 if (mbus_code && fmt->mbus_code == *mbus_code)
134 return fmt;
135 if (index == id)
136 def_fmt = fmt;
137 id++;
138 }
139 return def_fmt;
140 }
141
142 static int fimc_lite_hw_init(struct fimc_lite *fimc, bool isp_output)
143 {
144 struct fimc_source_info *si;
145 unsigned long flags;
146
147 if (fimc->sensor == NULL)
148 return -ENXIO;
149
150 if (fimc->inp_frame.fmt == NULL || fimc->out_frame.fmt == NULL)
151 return -EINVAL;
152
153 /* Get sensor configuration data from the sensor subdev */
154 si = v4l2_get_subdev_hostdata(fimc->sensor);
155 if (!si)
156 return -EINVAL;
157
158 spin_lock_irqsave(&fimc->slock, flags);
159
160 flite_hw_set_camera_bus(fimc, si);
161 flite_hw_set_source_format(fimc, &fimc->inp_frame);
162 flite_hw_set_window_offset(fimc, &fimc->inp_frame);
163 flite_hw_set_dma_buf_mask(fimc, 0);
164 flite_hw_set_output_dma(fimc, &fimc->out_frame, !isp_output);
165 flite_hw_set_interrupt_mask(fimc);
166 flite_hw_set_test_pattern(fimc, fimc->test_pattern->val);
167
168 if (debug > 0)
169 flite_hw_dump_regs(fimc, __func__);
170
171 spin_unlock_irqrestore(&fimc->slock, flags);
172 return 0;
173 }
174
175 /*
176 * Reinitialize the driver so it is ready to start the streaming again.
177 * Set fimc->state to indicate stream off and the hardware shut down state.
178 * If not suspending (@suspend is false), return any buffers to videobuf2.
179 * Otherwise put any owned buffers onto the pending buffers queue, so they
180 * can be re-spun when the device is being resumed. Also perform FIMC
181 * software reset and disable streaming on the whole pipeline if required.
182 */
183 static int fimc_lite_reinit(struct fimc_lite *fimc, bool suspend)
184 {
185 struct flite_buffer *buf;
186 unsigned long flags;
187 bool streaming;
188
189 spin_lock_irqsave(&fimc->slock, flags);
190 streaming = fimc->state & (1 << ST_SENSOR_STREAM);
191
192 fimc->state &= ~(1 << ST_FLITE_RUN | 1 << ST_FLITE_OFF |
193 1 << ST_FLITE_STREAM | 1 << ST_SENSOR_STREAM);
194 if (suspend)
195 fimc->state |= (1 << ST_FLITE_SUSPENDED);
196 else
197 fimc->state &= ~(1 << ST_FLITE_PENDING |
198 1 << ST_FLITE_SUSPENDED);
199
200 /* Release unused buffers */
201 while (!suspend && !list_empty(&fimc->pending_buf_q)) {
202 buf = fimc_lite_pending_queue_pop(fimc);
203 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
204 }
205 /* If suspending put unused buffers onto pending queue */
206 while (!list_empty(&fimc->active_buf_q)) {
207 buf = fimc_lite_active_queue_pop(fimc);
208 if (suspend)
209 fimc_lite_pending_queue_add(fimc, buf);
210 else
211 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
212 }
213
214 spin_unlock_irqrestore(&fimc->slock, flags);
215
216 flite_hw_reset(fimc);
217
218 if (!streaming)
219 return 0;
220
221 return fimc_pipeline_call(&fimc->ve, set_stream, 0);
222 }
223
224 static int fimc_lite_stop_capture(struct fimc_lite *fimc, bool suspend)
225 {
226 unsigned long flags;
227
228 if (!fimc_lite_active(fimc))
229 return 0;
230
231 spin_lock_irqsave(&fimc->slock, flags);
232 set_bit(ST_FLITE_OFF, &fimc->state);
233 flite_hw_capture_stop(fimc);
234 spin_unlock_irqrestore(&fimc->slock, flags);
235
236 wait_event_timeout(fimc->irq_queue,
237 !test_bit(ST_FLITE_OFF, &fimc->state),
238 (2*HZ/10)); /* 200 ms */
239
240 return fimc_lite_reinit(fimc, suspend);
241 }
242
243 /* Must be called with fimc.slock spinlock held. */
244 static void fimc_lite_config_update(struct fimc_lite *fimc)
245 {
246 flite_hw_set_window_offset(fimc, &fimc->inp_frame);
247 flite_hw_set_dma_window(fimc, &fimc->out_frame);
248 flite_hw_set_test_pattern(fimc, fimc->test_pattern->val);
249 clear_bit(ST_FLITE_CONFIG, &fimc->state);
250 }
251
252 static irqreturn_t flite_irq_handler(int irq, void *priv)
253 {
254 struct fimc_lite *fimc = priv;
255 struct flite_buffer *vbuf;
256 unsigned long flags;
257 u32 intsrc;
258
259 spin_lock_irqsave(&fimc->slock, flags);
260
261 intsrc = flite_hw_get_interrupt_source(fimc);
262 flite_hw_clear_pending_irq(fimc);
263
264 if (test_and_clear_bit(ST_FLITE_OFF, &fimc->state)) {
265 wake_up(&fimc->irq_queue);
266 goto done;
267 }
268
269 if (intsrc & FLITE_REG_CISTATUS_IRQ_SRC_OVERFLOW) {
270 clear_bit(ST_FLITE_RUN, &fimc->state);
271 fimc->events.data_overflow++;
272 }
273
274 if (intsrc & FLITE_REG_CISTATUS_IRQ_SRC_LASTCAPEND) {
275 flite_hw_clear_last_capture_end(fimc);
276 clear_bit(ST_FLITE_STREAM, &fimc->state);
277 wake_up(&fimc->irq_queue);
278 }
279
280 if (atomic_read(&fimc->out_path) != FIMC_IO_DMA)
281 goto done;
282
283 if ((intsrc & FLITE_REG_CISTATUS_IRQ_SRC_FRMSTART) &&
284 test_bit(ST_FLITE_RUN, &fimc->state) &&
285 !list_empty(&fimc->pending_buf_q)) {
286 vbuf = fimc_lite_pending_queue_pop(fimc);
287 flite_hw_set_dma_buffer(fimc, vbuf);
288 fimc_lite_active_queue_add(fimc, vbuf);
289 }
290
291 if ((intsrc & FLITE_REG_CISTATUS_IRQ_SRC_FRMEND) &&
292 test_bit(ST_FLITE_RUN, &fimc->state) &&
293 !list_empty(&fimc->active_buf_q)) {
294 vbuf = fimc_lite_active_queue_pop(fimc);
295 vbuf->vb.vb2_buf.timestamp = ktime_get_ns();
296 vbuf->vb.sequence = fimc->frame_count++;
297 flite_hw_mask_dma_buffer(fimc, vbuf->index);
298 vb2_buffer_done(&vbuf->vb.vb2_buf, VB2_BUF_STATE_DONE);
299 }
300
301 if (test_bit(ST_FLITE_CONFIG, &fimc->state))
302 fimc_lite_config_update(fimc);
303
304 if (list_empty(&fimc->pending_buf_q)) {
305 flite_hw_capture_stop(fimc);
306 clear_bit(ST_FLITE_STREAM, &fimc->state);
307 }
308 done:
309 set_bit(ST_FLITE_RUN, &fimc->state);
310 spin_unlock_irqrestore(&fimc->slock, flags);
311 return IRQ_HANDLED;
312 }
313
314 static int start_streaming(struct vb2_queue *q, unsigned int count)
315 {
316 struct fimc_lite *fimc = q->drv_priv;
317 unsigned long flags;
318 int ret;
319
320 spin_lock_irqsave(&fimc->slock, flags);
321
322 fimc->buf_index = 0;
323 fimc->frame_count = 0;
324
325 spin_unlock_irqrestore(&fimc->slock, flags);
326
327 ret = fimc_lite_hw_init(fimc, false);
328 if (ret) {
329 fimc_lite_reinit(fimc, false);
330 return ret;
331 }
332
333 set_bit(ST_FLITE_PENDING, &fimc->state);
334
335 if (!list_empty(&fimc->active_buf_q) &&
336 !test_and_set_bit(ST_FLITE_STREAM, &fimc->state)) {
337 flite_hw_capture_start(fimc);
338
339 if (!test_and_set_bit(ST_SENSOR_STREAM, &fimc->state))
340 fimc_pipeline_call(&fimc->ve, set_stream, 1);
341 }
342 if (debug > 0)
343 flite_hw_dump_regs(fimc, __func__);
344
345 return 0;
346 }
347
348 static void stop_streaming(struct vb2_queue *q)
349 {
350 struct fimc_lite *fimc = q->drv_priv;
351
352 if (!fimc_lite_active(fimc))
353 return;
354
355 fimc_lite_stop_capture(fimc, false);
356 }
357
358 static int queue_setup(struct vb2_queue *vq,
359 unsigned int *num_buffers, unsigned int *num_planes,
360 unsigned int sizes[], void *allocators[])
361 {
362 struct fimc_lite *fimc = vq->drv_priv;
363 struct flite_frame *frame = &fimc->out_frame;
364 const struct fimc_fmt *fmt = frame->fmt;
365 unsigned long wh = frame->f_width * frame->f_height;
366 int i;
367
368 if (fmt == NULL)
369 return -EINVAL;
370
371 if (*num_planes) {
372 if (*num_planes != fmt->memplanes)
373 return -EINVAL;
374 for (i = 0; i < *num_planes; i++) {
375 if (sizes[i] < (wh * fmt->depth[i]) / 8)
376 return -EINVAL;
377 allocators[i] = fimc->alloc_ctx;
378 }
379 return 0;
380 }
381
382 *num_planes = fmt->memplanes;
383
384 for (i = 0; i < fmt->memplanes; i++) {
385 sizes[i] = (wh * fmt->depth[i]) / 8;
386 allocators[i] = fimc->alloc_ctx;
387 }
388
389 return 0;
390 }
391
392 static int buffer_prepare(struct vb2_buffer *vb)
393 {
394 struct vb2_queue *vq = vb->vb2_queue;
395 struct fimc_lite *fimc = vq->drv_priv;
396 int i;
397
398 if (fimc->out_frame.fmt == NULL)
399 return -EINVAL;
400
401 for (i = 0; i < fimc->out_frame.fmt->memplanes; i++) {
402 unsigned long size = fimc->payload[i];
403
404 if (vb2_plane_size(vb, i) < size) {
405 v4l2_err(&fimc->ve.vdev,
406 "User buffer too small (%ld < %ld)\n",
407 vb2_plane_size(vb, i), size);
408 return -EINVAL;
409 }
410 vb2_set_plane_payload(vb, i, size);
411 }
412
413 return 0;
414 }
415
416 static void buffer_queue(struct vb2_buffer *vb)
417 {
418 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
419 struct flite_buffer *buf
420 = container_of(vbuf, struct flite_buffer, vb);
421 struct fimc_lite *fimc = vb2_get_drv_priv(vb->vb2_queue);
422 unsigned long flags;
423
424 spin_lock_irqsave(&fimc->slock, flags);
425 buf->paddr = vb2_dma_contig_plane_dma_addr(vb, 0);
426
427 buf->index = fimc->buf_index++;
428 if (fimc->buf_index >= fimc->reqbufs_count)
429 fimc->buf_index = 0;
430
431 if (!test_bit(ST_FLITE_SUSPENDED, &fimc->state) &&
432 !test_bit(ST_FLITE_STREAM, &fimc->state) &&
433 list_empty(&fimc->active_buf_q)) {
434 flite_hw_set_dma_buffer(fimc, buf);
435 fimc_lite_active_queue_add(fimc, buf);
436 } else {
437 fimc_lite_pending_queue_add(fimc, buf);
438 }
439
440 if (vb2_is_streaming(&fimc->vb_queue) &&
441 !list_empty(&fimc->pending_buf_q) &&
442 !test_and_set_bit(ST_FLITE_STREAM, &fimc->state)) {
443 flite_hw_capture_start(fimc);
444 spin_unlock_irqrestore(&fimc->slock, flags);
445
446 if (!test_and_set_bit(ST_SENSOR_STREAM, &fimc->state))
447 fimc_pipeline_call(&fimc->ve, set_stream, 1);
448 return;
449 }
450 spin_unlock_irqrestore(&fimc->slock, flags);
451 }
452
453 static const struct vb2_ops fimc_lite_qops = {
454 .queue_setup = queue_setup,
455 .buf_prepare = buffer_prepare,
456 .buf_queue = buffer_queue,
457 .wait_prepare = vb2_ops_wait_prepare,
458 .wait_finish = vb2_ops_wait_finish,
459 .start_streaming = start_streaming,
460 .stop_streaming = stop_streaming,
461 };
462
463 static void fimc_lite_clear_event_counters(struct fimc_lite *fimc)
464 {
465 unsigned long flags;
466
467 spin_lock_irqsave(&fimc->slock, flags);
468 memset(&fimc->events, 0, sizeof(fimc->events));
469 spin_unlock_irqrestore(&fimc->slock, flags);
470 }
471
472 static int fimc_lite_open(struct file *file)
473 {
474 struct fimc_lite *fimc = video_drvdata(file);
475 struct media_entity *me = &fimc->ve.vdev.entity;
476 int ret;
477
478 mutex_lock(&fimc->lock);
479 if (atomic_read(&fimc->out_path) != FIMC_IO_DMA) {
480 ret = -EBUSY;
481 goto unlock;
482 }
483
484 set_bit(ST_FLITE_IN_USE, &fimc->state);
485 ret = pm_runtime_get_sync(&fimc->pdev->dev);
486 if (ret < 0)
487 goto unlock;
488
489 ret = v4l2_fh_open(file);
490 if (ret < 0)
491 goto err_pm;
492
493 if (!v4l2_fh_is_singular_file(file) ||
494 atomic_read(&fimc->out_path) != FIMC_IO_DMA)
495 goto unlock;
496
497 mutex_lock(&me->graph_obj.mdev->graph_mutex);
498
499 ret = fimc_pipeline_call(&fimc->ve, open, me, true);
500
501 /* Mark video pipeline ending at this video node as in use. */
502 if (ret == 0)
503 me->use_count++;
504
505 mutex_unlock(&me->graph_obj.mdev->graph_mutex);
506
507 if (!ret) {
508 fimc_lite_clear_event_counters(fimc);
509 goto unlock;
510 }
511
512 v4l2_fh_release(file);
513 err_pm:
514 pm_runtime_put_sync(&fimc->pdev->dev);
515 clear_bit(ST_FLITE_IN_USE, &fimc->state);
516 unlock:
517 mutex_unlock(&fimc->lock);
518 return ret;
519 }
520
521 static int fimc_lite_release(struct file *file)
522 {
523 struct fimc_lite *fimc = video_drvdata(file);
524 struct media_entity *entity = &fimc->ve.vdev.entity;
525
526 mutex_lock(&fimc->lock);
527
528 if (v4l2_fh_is_singular_file(file) &&
529 atomic_read(&fimc->out_path) == FIMC_IO_DMA) {
530 if (fimc->streaming) {
531 media_entity_pipeline_stop(entity);
532 fimc->streaming = false;
533 }
534 fimc_lite_stop_capture(fimc, false);
535 fimc_pipeline_call(&fimc->ve, close);
536 clear_bit(ST_FLITE_IN_USE, &fimc->state);
537
538 mutex_lock(&entity->graph_obj.mdev->graph_mutex);
539 entity->use_count--;
540 mutex_unlock(&entity->graph_obj.mdev->graph_mutex);
541 }
542
543 _vb2_fop_release(file, NULL);
544 pm_runtime_put(&fimc->pdev->dev);
545 clear_bit(ST_FLITE_SUSPENDED, &fimc->state);
546
547 mutex_unlock(&fimc->lock);
548 return 0;
549 }
550
551 static const struct v4l2_file_operations fimc_lite_fops = {
552 .owner = THIS_MODULE,
553 .open = fimc_lite_open,
554 .release = fimc_lite_release,
555 .poll = vb2_fop_poll,
556 .unlocked_ioctl = video_ioctl2,
557 .mmap = vb2_fop_mmap,
558 };
559
560 /*
561 * Format and crop negotiation helpers
562 */
563
564 static const struct fimc_fmt *fimc_lite_subdev_try_fmt(struct fimc_lite *fimc,
565 struct v4l2_subdev_pad_config *cfg,
566 struct v4l2_subdev_format *format)
567 {
568 struct flite_drvdata *dd = fimc->dd;
569 struct v4l2_mbus_framefmt *mf = &format->format;
570 const struct fimc_fmt *fmt = NULL;
571
572 if (format->pad == FLITE_SD_PAD_SINK) {
573 v4l_bound_align_image(&mf->width, 8, dd->max_width,
574 ffs(dd->out_width_align) - 1,
575 &mf->height, 0, dd->max_height, 0, 0);
576
577 fmt = fimc_lite_find_format(NULL, &mf->code, 0, 0);
578 if (WARN_ON(!fmt))
579 return NULL;
580
581 mf->colorspace = fmt->colorspace;
582 mf->code = fmt->mbus_code;
583 } else {
584 struct flite_frame *sink = &fimc->inp_frame;
585 struct v4l2_mbus_framefmt *sink_fmt;
586 struct v4l2_rect *rect;
587
588 if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
589 sink_fmt = v4l2_subdev_get_try_format(&fimc->subdev, cfg,
590 FLITE_SD_PAD_SINK);
591
592 mf->code = sink_fmt->code;
593 mf->colorspace = sink_fmt->colorspace;
594
595 rect = v4l2_subdev_get_try_crop(&fimc->subdev, cfg,
596 FLITE_SD_PAD_SINK);
597 } else {
598 mf->code = sink->fmt->mbus_code;
599 mf->colorspace = sink->fmt->colorspace;
600 rect = &sink->rect;
601 }
602
603 /* Allow changing format only on sink pad */
604 mf->width = rect->width;
605 mf->height = rect->height;
606 }
607
608 mf->field = V4L2_FIELD_NONE;
609
610 v4l2_dbg(1, debug, &fimc->subdev, "code: %#x (%d), %dx%d\n",
611 mf->code, mf->colorspace, mf->width, mf->height);
612
613 return fmt;
614 }
615
616 static void fimc_lite_try_crop(struct fimc_lite *fimc, struct v4l2_rect *r)
617 {
618 struct flite_frame *frame = &fimc->inp_frame;
619
620 v4l_bound_align_image(&r->width, 0, frame->f_width, 0,
621 &r->height, 0, frame->f_height, 0, 0);
622
623 /* Adjust left/top if cropping rectangle got out of bounds */
624 r->left = clamp_t(u32, r->left, 0, frame->f_width - r->width);
625 r->left = round_down(r->left, fimc->dd->win_hor_offs_align);
626 r->top = clamp_t(u32, r->top, 0, frame->f_height - r->height);
627
628 v4l2_dbg(1, debug, &fimc->subdev, "(%d,%d)/%dx%d, sink fmt: %dx%d\n",
629 r->left, r->top, r->width, r->height,
630 frame->f_width, frame->f_height);
631 }
632
633 static void fimc_lite_try_compose(struct fimc_lite *fimc, struct v4l2_rect *r)
634 {
635 struct flite_frame *frame = &fimc->out_frame;
636 struct v4l2_rect *crop_rect = &fimc->inp_frame.rect;
637
638 /* Scaling is not supported so we enforce compose rectangle size
639 same as size of the sink crop rectangle. */
640 r->width = crop_rect->width;
641 r->height = crop_rect->height;
642
643 /* Adjust left/top if the composing rectangle got out of bounds */
644 r->left = clamp_t(u32, r->left, 0, frame->f_width - r->width);
645 r->left = round_down(r->left, fimc->dd->out_hor_offs_align);
646 r->top = clamp_t(u32, r->top, 0, fimc->out_frame.f_height - r->height);
647
648 v4l2_dbg(1, debug, &fimc->subdev, "(%d,%d)/%dx%d, source fmt: %dx%d\n",
649 r->left, r->top, r->width, r->height,
650 frame->f_width, frame->f_height);
651 }
652
653 /*
654 * Video node ioctl operations
655 */
656 static int fimc_lite_querycap(struct file *file, void *priv,
657 struct v4l2_capability *cap)
658 {
659 struct fimc_lite *fimc = video_drvdata(file);
660
661 strlcpy(cap->driver, FIMC_LITE_DRV_NAME, sizeof(cap->driver));
662 strlcpy(cap->card, FIMC_LITE_DRV_NAME, sizeof(cap->card));
663 snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
664 dev_name(&fimc->pdev->dev));
665
666 cap->device_caps = V4L2_CAP_STREAMING;
667 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
668 return 0;
669 }
670
671 static int fimc_lite_enum_fmt_mplane(struct file *file, void *priv,
672 struct v4l2_fmtdesc *f)
673 {
674 const struct fimc_fmt *fmt;
675
676 if (f->index >= ARRAY_SIZE(fimc_lite_formats))
677 return -EINVAL;
678
679 fmt = &fimc_lite_formats[f->index];
680 strlcpy(f->description, fmt->name, sizeof(f->description));
681 f->pixelformat = fmt->fourcc;
682
683 return 0;
684 }
685
686 static int fimc_lite_g_fmt_mplane(struct file *file, void *fh,
687 struct v4l2_format *f)
688 {
689 struct fimc_lite *fimc = video_drvdata(file);
690 struct v4l2_pix_format_mplane *pixm = &f->fmt.pix_mp;
691 struct v4l2_plane_pix_format *plane_fmt = &pixm->plane_fmt[0];
692 struct flite_frame *frame = &fimc->out_frame;
693 const struct fimc_fmt *fmt = frame->fmt;
694
695 plane_fmt->bytesperline = (frame->f_width * fmt->depth[0]) / 8;
696 plane_fmt->sizeimage = plane_fmt->bytesperline * frame->f_height;
697
698 pixm->num_planes = fmt->memplanes;
699 pixm->pixelformat = fmt->fourcc;
700 pixm->width = frame->f_width;
701 pixm->height = frame->f_height;
702 pixm->field = V4L2_FIELD_NONE;
703 pixm->colorspace = fmt->colorspace;
704 return 0;
705 }
706
707 static int fimc_lite_try_fmt(struct fimc_lite *fimc,
708 struct v4l2_pix_format_mplane *pixm,
709 const struct fimc_fmt **ffmt)
710 {
711 u32 bpl = pixm->plane_fmt[0].bytesperline;
712 struct flite_drvdata *dd = fimc->dd;
713 const struct fimc_fmt *inp_fmt = fimc->inp_frame.fmt;
714 const struct fimc_fmt *fmt;
715
716 if (WARN_ON(inp_fmt == NULL))
717 return -EINVAL;
718 /*
719 * We allow some flexibility only for YUV formats. In case of raw
720 * raw Bayer the FIMC-LITE's output format must match its camera
721 * interface input format.
722 */
723 if (inp_fmt->flags & FMT_FLAGS_YUV)
724 fmt = fimc_lite_find_format(&pixm->pixelformat, NULL,
725 inp_fmt->flags, 0);
726 else
727 fmt = inp_fmt;
728
729 if (WARN_ON(fmt == NULL))
730 return -EINVAL;
731 if (ffmt)
732 *ffmt = fmt;
733 v4l_bound_align_image(&pixm->width, 8, dd->max_width,
734 ffs(dd->out_width_align) - 1,
735 &pixm->height, 0, dd->max_height, 0, 0);
736
737 if ((bpl == 0 || ((bpl * 8) / fmt->depth[0]) < pixm->width))
738 pixm->plane_fmt[0].bytesperline = (pixm->width *
739 fmt->depth[0]) / 8;
740
741 if (pixm->plane_fmt[0].sizeimage == 0)
742 pixm->plane_fmt[0].sizeimage = (pixm->width * pixm->height *
743 fmt->depth[0]) / 8;
744 pixm->num_planes = fmt->memplanes;
745 pixm->pixelformat = fmt->fourcc;
746 pixm->colorspace = fmt->colorspace;
747 pixm->field = V4L2_FIELD_NONE;
748 return 0;
749 }
750
751 static int fimc_lite_try_fmt_mplane(struct file *file, void *fh,
752 struct v4l2_format *f)
753 {
754 struct fimc_lite *fimc = video_drvdata(file);
755 return fimc_lite_try_fmt(fimc, &f->fmt.pix_mp, NULL);
756 }
757
758 static int fimc_lite_s_fmt_mplane(struct file *file, void *priv,
759 struct v4l2_format *f)
760 {
761 struct v4l2_pix_format_mplane *pixm = &f->fmt.pix_mp;
762 struct fimc_lite *fimc = video_drvdata(file);
763 struct flite_frame *frame = &fimc->out_frame;
764 const struct fimc_fmt *fmt = NULL;
765 int ret;
766
767 if (vb2_is_busy(&fimc->vb_queue))
768 return -EBUSY;
769
770 ret = fimc_lite_try_fmt(fimc, &f->fmt.pix_mp, &fmt);
771 if (ret < 0)
772 return ret;
773
774 frame->fmt = fmt;
775 fimc->payload[0] = max((pixm->width * pixm->height * fmt->depth[0]) / 8,
776 pixm->plane_fmt[0].sizeimage);
777 frame->f_width = pixm->width;
778 frame->f_height = pixm->height;
779
780 return 0;
781 }
782
783 static int fimc_pipeline_validate(struct fimc_lite *fimc)
784 {
785 struct v4l2_subdev *sd = &fimc->subdev;
786 struct v4l2_subdev_format sink_fmt, src_fmt;
787 struct media_pad *pad;
788 int ret;
789
790 while (1) {
791 /* Retrieve format at the sink pad */
792 pad = &sd->entity.pads[0];
793 if (!(pad->flags & MEDIA_PAD_FL_SINK))
794 break;
795 /* Don't call FIMC subdev operation to avoid nested locking */
796 if (sd == &fimc->subdev) {
797 struct flite_frame *ff = &fimc->out_frame;
798 sink_fmt.format.width = ff->f_width;
799 sink_fmt.format.height = ff->f_height;
800 sink_fmt.format.code = fimc->inp_frame.fmt->mbus_code;
801 } else {
802 sink_fmt.pad = pad->index;
803 sink_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
804 ret = v4l2_subdev_call(sd, pad, get_fmt, NULL,
805 &sink_fmt);
806 if (ret < 0 && ret != -ENOIOCTLCMD)
807 return -EPIPE;
808 }
809 /* Retrieve format at the source pad */
810 pad = media_entity_remote_pad(pad);
811 if (!pad || !is_media_entity_v4l2_subdev(pad->entity))
812 break;
813
814 sd = media_entity_to_v4l2_subdev(pad->entity);
815 src_fmt.pad = pad->index;
816 src_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
817 ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &src_fmt);
818 if (ret < 0 && ret != -ENOIOCTLCMD)
819 return -EPIPE;
820
821 if (src_fmt.format.width != sink_fmt.format.width ||
822 src_fmt.format.height != sink_fmt.format.height ||
823 src_fmt.format.code != sink_fmt.format.code)
824 return -EPIPE;
825 }
826 return 0;
827 }
828
829 static int fimc_lite_streamon(struct file *file, void *priv,
830 enum v4l2_buf_type type)
831 {
832 struct fimc_lite *fimc = video_drvdata(file);
833 struct media_entity *entity = &fimc->ve.vdev.entity;
834 int ret;
835
836 if (fimc_lite_active(fimc))
837 return -EBUSY;
838
839 ret = media_entity_pipeline_start(entity, &fimc->ve.pipe->mp);
840 if (ret < 0)
841 return ret;
842
843 ret = fimc_pipeline_validate(fimc);
844 if (ret < 0)
845 goto err_p_stop;
846
847 fimc->sensor = fimc_find_remote_sensor(&fimc->subdev.entity);
848
849 ret = vb2_ioctl_streamon(file, priv, type);
850 if (!ret) {
851 fimc->streaming = true;
852 return ret;
853 }
854
855 err_p_stop:
856 media_entity_pipeline_stop(entity);
857 return 0;
858 }
859
860 static int fimc_lite_streamoff(struct file *file, void *priv,
861 enum v4l2_buf_type type)
862 {
863 struct fimc_lite *fimc = video_drvdata(file);
864 int ret;
865
866 ret = vb2_ioctl_streamoff(file, priv, type);
867 if (ret < 0)
868 return ret;
869
870 media_entity_pipeline_stop(&fimc->ve.vdev.entity);
871 fimc->streaming = false;
872 return 0;
873 }
874
875 static int fimc_lite_reqbufs(struct file *file, void *priv,
876 struct v4l2_requestbuffers *reqbufs)
877 {
878 struct fimc_lite *fimc = video_drvdata(file);
879 int ret;
880
881 reqbufs->count = max_t(u32, FLITE_REQ_BUFS_MIN, reqbufs->count);
882 ret = vb2_ioctl_reqbufs(file, priv, reqbufs);
883 if (!ret)
884 fimc->reqbufs_count = reqbufs->count;
885
886 return ret;
887 }
888
889 /* Return 1 if rectangle a is enclosed in rectangle b, or 0 otherwise. */
890 static int enclosed_rectangle(struct v4l2_rect *a, struct v4l2_rect *b)
891 {
892 if (a->left < b->left || a->top < b->top)
893 return 0;
894 if (a->left + a->width > b->left + b->width)
895 return 0;
896 if (a->top + a->height > b->top + b->height)
897 return 0;
898
899 return 1;
900 }
901
902 static int fimc_lite_g_selection(struct file *file, void *fh,
903 struct v4l2_selection *sel)
904 {
905 struct fimc_lite *fimc = video_drvdata(file);
906 struct flite_frame *f = &fimc->out_frame;
907
908 if (sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
909 return -EINVAL;
910
911 switch (sel->target) {
912 case V4L2_SEL_TGT_COMPOSE_BOUNDS:
913 case V4L2_SEL_TGT_COMPOSE_DEFAULT:
914 sel->r.left = 0;
915 sel->r.top = 0;
916 sel->r.width = f->f_width;
917 sel->r.height = f->f_height;
918 return 0;
919
920 case V4L2_SEL_TGT_COMPOSE:
921 sel->r = f->rect;
922 return 0;
923 }
924
925 return -EINVAL;
926 }
927
928 static int fimc_lite_s_selection(struct file *file, void *fh,
929 struct v4l2_selection *sel)
930 {
931 struct fimc_lite *fimc = video_drvdata(file);
932 struct flite_frame *f = &fimc->out_frame;
933 struct v4l2_rect rect = sel->r;
934 unsigned long flags;
935
936 if (sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE ||
937 sel->target != V4L2_SEL_TGT_COMPOSE)
938 return -EINVAL;
939
940 fimc_lite_try_compose(fimc, &rect);
941
942 if ((sel->flags & V4L2_SEL_FLAG_LE) &&
943 !enclosed_rectangle(&rect, &sel->r))
944 return -ERANGE;
945
946 if ((sel->flags & V4L2_SEL_FLAG_GE) &&
947 !enclosed_rectangle(&sel->r, &rect))
948 return -ERANGE;
949
950 sel->r = rect;
951 spin_lock_irqsave(&fimc->slock, flags);
952 f->rect = rect;
953 set_bit(ST_FLITE_CONFIG, &fimc->state);
954 spin_unlock_irqrestore(&fimc->slock, flags);
955
956 return 0;
957 }
958
959 static const struct v4l2_ioctl_ops fimc_lite_ioctl_ops = {
960 .vidioc_querycap = fimc_lite_querycap,
961 .vidioc_enum_fmt_vid_cap_mplane = fimc_lite_enum_fmt_mplane,
962 .vidioc_try_fmt_vid_cap_mplane = fimc_lite_try_fmt_mplane,
963 .vidioc_s_fmt_vid_cap_mplane = fimc_lite_s_fmt_mplane,
964 .vidioc_g_fmt_vid_cap_mplane = fimc_lite_g_fmt_mplane,
965 .vidioc_g_selection = fimc_lite_g_selection,
966 .vidioc_s_selection = fimc_lite_s_selection,
967 .vidioc_reqbufs = fimc_lite_reqbufs,
968 .vidioc_querybuf = vb2_ioctl_querybuf,
969 .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
970 .vidioc_create_bufs = vb2_ioctl_create_bufs,
971 .vidioc_qbuf = vb2_ioctl_qbuf,
972 .vidioc_dqbuf = vb2_ioctl_dqbuf,
973 .vidioc_streamon = fimc_lite_streamon,
974 .vidioc_streamoff = fimc_lite_streamoff,
975 };
976
977 /* Capture subdev media entity operations */
978 static int fimc_lite_link_setup(struct media_entity *entity,
979 const struct media_pad *local,
980 const struct media_pad *remote, u32 flags)
981 {
982 struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity);
983 struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
984 int ret = 0;
985
986 if (WARN_ON(fimc == NULL))
987 return 0;
988
989 v4l2_dbg(1, debug, sd, "%s: %s --> %s, flags: 0x%x. source_id: 0x%x\n",
990 __func__, remote->entity->name, local->entity->name,
991 flags, fimc->source_subdev_grp_id);
992
993 switch (local->index) {
994 case FLITE_SD_PAD_SINK:
995 if (flags & MEDIA_LNK_FL_ENABLED) {
996 if (fimc->source_subdev_grp_id == 0)
997 fimc->source_subdev_grp_id = sd->grp_id;
998 else
999 ret = -EBUSY;
1000 } else {
1001 fimc->source_subdev_grp_id = 0;
1002 fimc->sensor = NULL;
1003 }
1004 break;
1005
1006 case FLITE_SD_PAD_SOURCE_DMA:
1007 if (!(flags & MEDIA_LNK_FL_ENABLED))
1008 atomic_set(&fimc->out_path, FIMC_IO_NONE);
1009 else
1010 atomic_set(&fimc->out_path, FIMC_IO_DMA);
1011 break;
1012
1013 case FLITE_SD_PAD_SOURCE_ISP:
1014 if (!(flags & MEDIA_LNK_FL_ENABLED))
1015 atomic_set(&fimc->out_path, FIMC_IO_NONE);
1016 else
1017 atomic_set(&fimc->out_path, FIMC_IO_ISP);
1018 break;
1019
1020 default:
1021 v4l2_err(sd, "Invalid pad index\n");
1022 ret = -EINVAL;
1023 }
1024 mb();
1025
1026 return ret;
1027 }
1028
1029 static const struct media_entity_operations fimc_lite_subdev_media_ops = {
1030 .link_setup = fimc_lite_link_setup,
1031 };
1032
1033 static int fimc_lite_subdev_enum_mbus_code(struct v4l2_subdev *sd,
1034 struct v4l2_subdev_pad_config *cfg,
1035 struct v4l2_subdev_mbus_code_enum *code)
1036 {
1037 const struct fimc_fmt *fmt;
1038
1039 fmt = fimc_lite_find_format(NULL, NULL, 0, code->index);
1040 if (!fmt)
1041 return -EINVAL;
1042 code->code = fmt->mbus_code;
1043 return 0;
1044 }
1045
1046 static struct v4l2_mbus_framefmt *__fimc_lite_subdev_get_try_fmt(
1047 struct v4l2_subdev *sd,
1048 struct v4l2_subdev_pad_config *cfg, unsigned int pad)
1049 {
1050 if (pad != FLITE_SD_PAD_SINK)
1051 pad = FLITE_SD_PAD_SOURCE_DMA;
1052
1053 return v4l2_subdev_get_try_format(sd, cfg, pad);
1054 }
1055
1056 static int fimc_lite_subdev_get_fmt(struct v4l2_subdev *sd,
1057 struct v4l2_subdev_pad_config *cfg,
1058 struct v4l2_subdev_format *fmt)
1059 {
1060 struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1061 struct v4l2_mbus_framefmt *mf = &fmt->format;
1062 struct flite_frame *f = &fimc->inp_frame;
1063
1064 if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
1065 mf = __fimc_lite_subdev_get_try_fmt(sd, cfg, fmt->pad);
1066 fmt->format = *mf;
1067 return 0;
1068 }
1069
1070 mutex_lock(&fimc->lock);
1071 mf->colorspace = f->fmt->colorspace;
1072 mf->code = f->fmt->mbus_code;
1073
1074 if (fmt->pad == FLITE_SD_PAD_SINK) {
1075 /* full camera input frame size */
1076 mf->width = f->f_width;
1077 mf->height = f->f_height;
1078 } else {
1079 /* crop size */
1080 mf->width = f->rect.width;
1081 mf->height = f->rect.height;
1082 }
1083 mutex_unlock(&fimc->lock);
1084 return 0;
1085 }
1086
1087 static int fimc_lite_subdev_set_fmt(struct v4l2_subdev *sd,
1088 struct v4l2_subdev_pad_config *cfg,
1089 struct v4l2_subdev_format *fmt)
1090 {
1091 struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1092 struct v4l2_mbus_framefmt *mf = &fmt->format;
1093 struct flite_frame *sink = &fimc->inp_frame;
1094 struct flite_frame *source = &fimc->out_frame;
1095 const struct fimc_fmt *ffmt;
1096
1097 v4l2_dbg(1, debug, sd, "pad%d: code: 0x%x, %dx%d\n",
1098 fmt->pad, mf->code, mf->width, mf->height);
1099
1100 mutex_lock(&fimc->lock);
1101
1102 if ((atomic_read(&fimc->out_path) == FIMC_IO_ISP &&
1103 sd->entity.stream_count > 0) ||
1104 (atomic_read(&fimc->out_path) == FIMC_IO_DMA &&
1105 vb2_is_busy(&fimc->vb_queue))) {
1106 mutex_unlock(&fimc->lock);
1107 return -EBUSY;
1108 }
1109
1110 ffmt = fimc_lite_subdev_try_fmt(fimc, cfg, fmt);
1111
1112 if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
1113 struct v4l2_mbus_framefmt *src_fmt;
1114
1115 mf = __fimc_lite_subdev_get_try_fmt(sd, cfg, fmt->pad);
1116 *mf = fmt->format;
1117
1118 if (fmt->pad == FLITE_SD_PAD_SINK) {
1119 unsigned int pad = FLITE_SD_PAD_SOURCE_DMA;
1120 src_fmt = __fimc_lite_subdev_get_try_fmt(sd, cfg, pad);
1121 *src_fmt = *mf;
1122 }
1123
1124 mutex_unlock(&fimc->lock);
1125 return 0;
1126 }
1127
1128 if (fmt->pad == FLITE_SD_PAD_SINK) {
1129 sink->f_width = mf->width;
1130 sink->f_height = mf->height;
1131 sink->fmt = ffmt;
1132 /* Set sink crop rectangle */
1133 sink->rect.width = mf->width;
1134 sink->rect.height = mf->height;
1135 sink->rect.left = 0;
1136 sink->rect.top = 0;
1137 /* Reset source format and crop rectangle */
1138 source->rect = sink->rect;
1139 source->f_width = mf->width;
1140 source->f_height = mf->height;
1141 }
1142
1143 mutex_unlock(&fimc->lock);
1144 return 0;
1145 }
1146
1147 static int fimc_lite_subdev_get_selection(struct v4l2_subdev *sd,
1148 struct v4l2_subdev_pad_config *cfg,
1149 struct v4l2_subdev_selection *sel)
1150 {
1151 struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1152 struct flite_frame *f = &fimc->inp_frame;
1153
1154 if ((sel->target != V4L2_SEL_TGT_CROP &&
1155 sel->target != V4L2_SEL_TGT_CROP_BOUNDS) ||
1156 sel->pad != FLITE_SD_PAD_SINK)
1157 return -EINVAL;
1158
1159 if (sel->which == V4L2_SUBDEV_FORMAT_TRY) {
1160 sel->r = *v4l2_subdev_get_try_crop(sd, cfg, sel->pad);
1161 return 0;
1162 }
1163
1164 mutex_lock(&fimc->lock);
1165 if (sel->target == V4L2_SEL_TGT_CROP) {
1166 sel->r = f->rect;
1167 } else {
1168 sel->r.left = 0;
1169 sel->r.top = 0;
1170 sel->r.width = f->f_width;
1171 sel->r.height = f->f_height;
1172 }
1173 mutex_unlock(&fimc->lock);
1174
1175 v4l2_dbg(1, debug, sd, "%s: (%d,%d) %dx%d, f_w: %d, f_h: %d\n",
1176 __func__, f->rect.left, f->rect.top, f->rect.width,
1177 f->rect.height, f->f_width, f->f_height);
1178
1179 return 0;
1180 }
1181
1182 static int fimc_lite_subdev_set_selection(struct v4l2_subdev *sd,
1183 struct v4l2_subdev_pad_config *cfg,
1184 struct v4l2_subdev_selection *sel)
1185 {
1186 struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1187 struct flite_frame *f = &fimc->inp_frame;
1188 int ret = 0;
1189
1190 if (sel->target != V4L2_SEL_TGT_CROP || sel->pad != FLITE_SD_PAD_SINK)
1191 return -EINVAL;
1192
1193 mutex_lock(&fimc->lock);
1194 fimc_lite_try_crop(fimc, &sel->r);
1195
1196 if (sel->which == V4L2_SUBDEV_FORMAT_TRY) {
1197 *v4l2_subdev_get_try_crop(sd, cfg, sel->pad) = sel->r;
1198 } else {
1199 unsigned long flags;
1200 spin_lock_irqsave(&fimc->slock, flags);
1201 f->rect = sel->r;
1202 /* Same crop rectangle on the source pad */
1203 fimc->out_frame.rect = sel->r;
1204 set_bit(ST_FLITE_CONFIG, &fimc->state);
1205 spin_unlock_irqrestore(&fimc->slock, flags);
1206 }
1207 mutex_unlock(&fimc->lock);
1208
1209 v4l2_dbg(1, debug, sd, "%s: (%d,%d) %dx%d, f_w: %d, f_h: %d\n",
1210 __func__, f->rect.left, f->rect.top, f->rect.width,
1211 f->rect.height, f->f_width, f->f_height);
1212
1213 return ret;
1214 }
1215
1216 static int fimc_lite_subdev_s_stream(struct v4l2_subdev *sd, int on)
1217 {
1218 struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1219 unsigned long flags;
1220 int ret;
1221
1222 /*
1223 * Find sensor subdev linked to FIMC-LITE directly or through
1224 * MIPI-CSIS. This is required for configuration where FIMC-LITE
1225 * is used as a subdev only and feeds data internally to FIMC-IS.
1226 * The pipeline links are protected through entity.stream_count
1227 * so there is no need to take the media graph mutex here.
1228 */
1229 fimc->sensor = fimc_find_remote_sensor(&sd->entity);
1230
1231 if (atomic_read(&fimc->out_path) != FIMC_IO_ISP)
1232 return -ENOIOCTLCMD;
1233
1234 mutex_lock(&fimc->lock);
1235 if (on) {
1236 flite_hw_reset(fimc);
1237 ret = fimc_lite_hw_init(fimc, true);
1238 if (!ret) {
1239 spin_lock_irqsave(&fimc->slock, flags);
1240 flite_hw_capture_start(fimc);
1241 spin_unlock_irqrestore(&fimc->slock, flags);
1242 }
1243 } else {
1244 set_bit(ST_FLITE_OFF, &fimc->state);
1245
1246 spin_lock_irqsave(&fimc->slock, flags);
1247 flite_hw_capture_stop(fimc);
1248 spin_unlock_irqrestore(&fimc->slock, flags);
1249
1250 ret = wait_event_timeout(fimc->irq_queue,
1251 !test_bit(ST_FLITE_OFF, &fimc->state),
1252 msecs_to_jiffies(200));
1253 if (ret == 0)
1254 v4l2_err(sd, "s_stream(0) timeout\n");
1255 clear_bit(ST_FLITE_RUN, &fimc->state);
1256 }
1257
1258 mutex_unlock(&fimc->lock);
1259 return ret;
1260 }
1261
1262 static int fimc_lite_log_status(struct v4l2_subdev *sd)
1263 {
1264 struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1265
1266 flite_hw_dump_regs(fimc, __func__);
1267 return 0;
1268 }
1269
1270 static int fimc_lite_subdev_registered(struct v4l2_subdev *sd)
1271 {
1272 struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1273 struct vb2_queue *q = &fimc->vb_queue;
1274 struct video_device *vfd = &fimc->ve.vdev;
1275 int ret;
1276
1277 memset(vfd, 0, sizeof(*vfd));
1278 atomic_set(&fimc->out_path, FIMC_IO_DMA);
1279
1280 snprintf(vfd->name, sizeof(vfd->name), "fimc-lite.%d.capture",
1281 fimc->index);
1282
1283 vfd->fops = &fimc_lite_fops;
1284 vfd->ioctl_ops = &fimc_lite_ioctl_ops;
1285 vfd->v4l2_dev = sd->v4l2_dev;
1286 vfd->minor = -1;
1287 vfd->release = video_device_release_empty;
1288 vfd->queue = q;
1289 fimc->reqbufs_count = 0;
1290
1291 INIT_LIST_HEAD(&fimc->pending_buf_q);
1292 INIT_LIST_HEAD(&fimc->active_buf_q);
1293
1294 memset(q, 0, sizeof(*q));
1295 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
1296 q->io_modes = VB2_MMAP | VB2_USERPTR;
1297 q->ops = &fimc_lite_qops;
1298 q->mem_ops = &vb2_dma_contig_memops;
1299 q->buf_struct_size = sizeof(struct flite_buffer);
1300 q->drv_priv = fimc;
1301 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1302 q->lock = &fimc->lock;
1303
1304 ret = vb2_queue_init(q);
1305 if (ret < 0)
1306 return ret;
1307
1308 fimc->vd_pad.flags = MEDIA_PAD_FL_SINK;
1309 ret = media_entity_pads_init(&vfd->entity, 1, &fimc->vd_pad);
1310 if (ret < 0)
1311 return ret;
1312
1313 video_set_drvdata(vfd, fimc);
1314 fimc->ve.pipe = v4l2_get_subdev_hostdata(sd);
1315
1316 ret = video_register_device(vfd, VFL_TYPE_GRABBER, -1);
1317 if (ret < 0) {
1318 media_entity_cleanup(&vfd->entity);
1319 fimc->ve.pipe = NULL;
1320 return ret;
1321 }
1322
1323 v4l2_info(sd->v4l2_dev, "Registered %s as /dev/%s\n",
1324 vfd->name, video_device_node_name(vfd));
1325 return 0;
1326 }
1327
1328 static void fimc_lite_subdev_unregistered(struct v4l2_subdev *sd)
1329 {
1330 struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1331
1332 if (fimc == NULL)
1333 return;
1334
1335 mutex_lock(&fimc->lock);
1336
1337 if (video_is_registered(&fimc->ve.vdev)) {
1338 video_unregister_device(&fimc->ve.vdev);
1339 media_entity_cleanup(&fimc->ve.vdev.entity);
1340 fimc->ve.pipe = NULL;
1341 }
1342
1343 mutex_unlock(&fimc->lock);
1344 }
1345
1346 static const struct v4l2_subdev_internal_ops fimc_lite_subdev_internal_ops = {
1347 .registered = fimc_lite_subdev_registered,
1348 .unregistered = fimc_lite_subdev_unregistered,
1349 };
1350
1351 static const struct v4l2_subdev_pad_ops fimc_lite_subdev_pad_ops = {
1352 .enum_mbus_code = fimc_lite_subdev_enum_mbus_code,
1353 .get_selection = fimc_lite_subdev_get_selection,
1354 .set_selection = fimc_lite_subdev_set_selection,
1355 .get_fmt = fimc_lite_subdev_get_fmt,
1356 .set_fmt = fimc_lite_subdev_set_fmt,
1357 };
1358
1359 static const struct v4l2_subdev_video_ops fimc_lite_subdev_video_ops = {
1360 .s_stream = fimc_lite_subdev_s_stream,
1361 };
1362
1363 static const struct v4l2_subdev_core_ops fimc_lite_core_ops = {
1364 .log_status = fimc_lite_log_status,
1365 };
1366
1367 static struct v4l2_subdev_ops fimc_lite_subdev_ops = {
1368 .core = &fimc_lite_core_ops,
1369 .video = &fimc_lite_subdev_video_ops,
1370 .pad = &fimc_lite_subdev_pad_ops,
1371 };
1372
1373 static int fimc_lite_s_ctrl(struct v4l2_ctrl *ctrl)
1374 {
1375 struct fimc_lite *fimc = container_of(ctrl->handler, struct fimc_lite,
1376 ctrl_handler);
1377 set_bit(ST_FLITE_CONFIG, &fimc->state);
1378 return 0;
1379 }
1380
1381 static const struct v4l2_ctrl_ops fimc_lite_ctrl_ops = {
1382 .s_ctrl = fimc_lite_s_ctrl,
1383 };
1384
1385 static const struct v4l2_ctrl_config fimc_lite_ctrl = {
1386 .ops = &fimc_lite_ctrl_ops,
1387 .id = V4L2_CTRL_CLASS_USER | 0x1001,
1388 .type = V4L2_CTRL_TYPE_BOOLEAN,
1389 .name = "Test Pattern 640x480",
1390 .step = 1,
1391 };
1392
1393 static void fimc_lite_set_default_config(struct fimc_lite *fimc)
1394 {
1395 struct flite_frame *sink = &fimc->inp_frame;
1396 struct flite_frame *source = &fimc->out_frame;
1397
1398 sink->fmt = &fimc_lite_formats[0];
1399 sink->f_width = FLITE_DEFAULT_WIDTH;
1400 sink->f_height = FLITE_DEFAULT_HEIGHT;
1401
1402 sink->rect.width = FLITE_DEFAULT_WIDTH;
1403 sink->rect.height = FLITE_DEFAULT_HEIGHT;
1404 sink->rect.left = 0;
1405 sink->rect.top = 0;
1406
1407 *source = *sink;
1408 }
1409
1410 static int fimc_lite_create_capture_subdev(struct fimc_lite *fimc)
1411 {
1412 struct v4l2_ctrl_handler *handler = &fimc->ctrl_handler;
1413 struct v4l2_subdev *sd = &fimc->subdev;
1414 int ret;
1415
1416 v4l2_subdev_init(sd, &fimc_lite_subdev_ops);
1417 sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
1418 snprintf(sd->name, sizeof(sd->name), "FIMC-LITE.%d", fimc->index);
1419
1420 fimc->subdev_pads[FLITE_SD_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
1421 fimc->subdev_pads[FLITE_SD_PAD_SOURCE_DMA].flags = MEDIA_PAD_FL_SOURCE;
1422 fimc->subdev_pads[FLITE_SD_PAD_SOURCE_ISP].flags = MEDIA_PAD_FL_SOURCE;
1423 ret = media_entity_pads_init(&sd->entity, FLITE_SD_PADS_NUM,
1424 fimc->subdev_pads);
1425 if (ret)
1426 return ret;
1427
1428 v4l2_ctrl_handler_init(handler, 1);
1429 fimc->test_pattern = v4l2_ctrl_new_custom(handler, &fimc_lite_ctrl,
1430 NULL);
1431 if (handler->error) {
1432 media_entity_cleanup(&sd->entity);
1433 return handler->error;
1434 }
1435
1436 sd->ctrl_handler = handler;
1437 sd->internal_ops = &fimc_lite_subdev_internal_ops;
1438 sd->entity.ops = &fimc_lite_subdev_media_ops;
1439 sd->owner = THIS_MODULE;
1440 v4l2_set_subdevdata(sd, fimc);
1441
1442 return 0;
1443 }
1444
1445 static void fimc_lite_unregister_capture_subdev(struct fimc_lite *fimc)
1446 {
1447 struct v4l2_subdev *sd = &fimc->subdev;
1448
1449 v4l2_device_unregister_subdev(sd);
1450 media_entity_cleanup(&sd->entity);
1451 v4l2_ctrl_handler_free(&fimc->ctrl_handler);
1452 v4l2_set_subdevdata(sd, NULL);
1453 }
1454
1455 static void fimc_lite_clk_put(struct fimc_lite *fimc)
1456 {
1457 if (IS_ERR(fimc->clock))
1458 return;
1459
1460 clk_unprepare(fimc->clock);
1461 clk_put(fimc->clock);
1462 fimc->clock = ERR_PTR(-EINVAL);
1463 }
1464
1465 static int fimc_lite_clk_get(struct fimc_lite *fimc)
1466 {
1467 int ret;
1468
1469 fimc->clock = clk_get(&fimc->pdev->dev, FLITE_CLK_NAME);
1470 if (IS_ERR(fimc->clock))
1471 return PTR_ERR(fimc->clock);
1472
1473 ret = clk_prepare(fimc->clock);
1474 if (ret < 0) {
1475 clk_put(fimc->clock);
1476 fimc->clock = ERR_PTR(-EINVAL);
1477 }
1478 return ret;
1479 }
1480
1481 static const struct of_device_id flite_of_match[];
1482
1483 static int fimc_lite_probe(struct platform_device *pdev)
1484 {
1485 struct flite_drvdata *drv_data = NULL;
1486 struct device *dev = &pdev->dev;
1487 const struct of_device_id *of_id;
1488 struct fimc_lite *fimc;
1489 struct resource *res;
1490 int ret;
1491
1492 if (!dev->of_node)
1493 return -ENODEV;
1494
1495 fimc = devm_kzalloc(dev, sizeof(*fimc), GFP_KERNEL);
1496 if (!fimc)
1497 return -ENOMEM;
1498
1499 of_id = of_match_node(flite_of_match, dev->of_node);
1500 if (of_id)
1501 drv_data = (struct flite_drvdata *)of_id->data;
1502 fimc->index = of_alias_get_id(dev->of_node, "fimc-lite");
1503
1504 if (!drv_data || fimc->index >= drv_data->num_instances ||
1505 fimc->index < 0) {
1506 dev_err(dev, "Wrong %s node alias\n",
1507 dev->of_node->full_name);
1508 return -EINVAL;
1509 }
1510
1511 fimc->dd = drv_data;
1512 fimc->pdev = pdev;
1513
1514 init_waitqueue_head(&fimc->irq_queue);
1515 spin_lock_init(&fimc->slock);
1516 mutex_init(&fimc->lock);
1517
1518 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1519 fimc->regs = devm_ioremap_resource(dev, res);
1520 if (IS_ERR(fimc->regs))
1521 return PTR_ERR(fimc->regs);
1522
1523 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1524 if (res == NULL) {
1525 dev_err(dev, "Failed to get IRQ resource\n");
1526 return -ENXIO;
1527 }
1528
1529 ret = fimc_lite_clk_get(fimc);
1530 if (ret)
1531 return ret;
1532
1533 ret = devm_request_irq(dev, res->start, flite_irq_handler,
1534 0, dev_name(dev), fimc);
1535 if (ret) {
1536 dev_err(dev, "Failed to install irq (%d)\n", ret);
1537 goto err_clk_put;
1538 }
1539
1540 /* The video node will be created within the subdev's registered() op */
1541 ret = fimc_lite_create_capture_subdev(fimc);
1542 if (ret)
1543 goto err_clk_put;
1544
1545 platform_set_drvdata(pdev, fimc);
1546 pm_runtime_enable(dev);
1547
1548 if (!pm_runtime_enabled(dev)) {
1549 ret = clk_enable(fimc->clock);
1550 if (ret < 0)
1551 goto err_sd;
1552 }
1553
1554 fimc->alloc_ctx = vb2_dma_contig_init_ctx(dev);
1555 if (IS_ERR(fimc->alloc_ctx)) {
1556 ret = PTR_ERR(fimc->alloc_ctx);
1557 goto err_clk_dis;
1558 }
1559
1560 fimc_lite_set_default_config(fimc);
1561
1562 dev_dbg(dev, "FIMC-LITE.%d registered successfully\n",
1563 fimc->index);
1564 return 0;
1565
1566 err_clk_dis:
1567 if (!pm_runtime_enabled(dev))
1568 clk_disable(fimc->clock);
1569 err_sd:
1570 fimc_lite_unregister_capture_subdev(fimc);
1571 err_clk_put:
1572 fimc_lite_clk_put(fimc);
1573 return ret;
1574 }
1575
1576 #ifdef CONFIG_PM
1577 static int fimc_lite_runtime_resume(struct device *dev)
1578 {
1579 struct fimc_lite *fimc = dev_get_drvdata(dev);
1580
1581 clk_enable(fimc->clock);
1582 return 0;
1583 }
1584
1585 static int fimc_lite_runtime_suspend(struct device *dev)
1586 {
1587 struct fimc_lite *fimc = dev_get_drvdata(dev);
1588
1589 clk_disable(fimc->clock);
1590 return 0;
1591 }
1592 #endif
1593
1594 #ifdef CONFIG_PM_SLEEP
1595 static int fimc_lite_resume(struct device *dev)
1596 {
1597 struct fimc_lite *fimc = dev_get_drvdata(dev);
1598 struct flite_buffer *buf;
1599 unsigned long flags;
1600 int i;
1601
1602 spin_lock_irqsave(&fimc->slock, flags);
1603 if (!test_and_clear_bit(ST_LPM, &fimc->state) ||
1604 !test_bit(ST_FLITE_IN_USE, &fimc->state)) {
1605 spin_unlock_irqrestore(&fimc->slock, flags);
1606 return 0;
1607 }
1608 flite_hw_reset(fimc);
1609 spin_unlock_irqrestore(&fimc->slock, flags);
1610
1611 if (!test_and_clear_bit(ST_FLITE_SUSPENDED, &fimc->state))
1612 return 0;
1613
1614 INIT_LIST_HEAD(&fimc->active_buf_q);
1615 fimc_pipeline_call(&fimc->ve, open,
1616 &fimc->ve.vdev.entity, false);
1617 fimc_lite_hw_init(fimc, atomic_read(&fimc->out_path) == FIMC_IO_ISP);
1618 clear_bit(ST_FLITE_SUSPENDED, &fimc->state);
1619
1620 for (i = 0; i < fimc->reqbufs_count; i++) {
1621 if (list_empty(&fimc->pending_buf_q))
1622 break;
1623 buf = fimc_lite_pending_queue_pop(fimc);
1624 buffer_queue(&buf->vb.vb2_buf);
1625 }
1626 return 0;
1627 }
1628
1629 static int fimc_lite_suspend(struct device *dev)
1630 {
1631 struct fimc_lite *fimc = dev_get_drvdata(dev);
1632 bool suspend = test_bit(ST_FLITE_IN_USE, &fimc->state);
1633 int ret;
1634
1635 if (test_and_set_bit(ST_LPM, &fimc->state))
1636 return 0;
1637
1638 ret = fimc_lite_stop_capture(fimc, suspend);
1639 if (ret < 0 || !fimc_lite_active(fimc))
1640 return ret;
1641
1642 return fimc_pipeline_call(&fimc->ve, close);
1643 }
1644 #endif /* CONFIG_PM_SLEEP */
1645
1646 static int fimc_lite_remove(struct platform_device *pdev)
1647 {
1648 struct fimc_lite *fimc = platform_get_drvdata(pdev);
1649 struct device *dev = &pdev->dev;
1650
1651 pm_runtime_disable(dev);
1652 pm_runtime_set_suspended(dev);
1653 fimc_lite_unregister_capture_subdev(fimc);
1654 vb2_dma_contig_cleanup_ctx(fimc->alloc_ctx);
1655 fimc_lite_clk_put(fimc);
1656
1657 dev_info(dev, "Driver unloaded\n");
1658 return 0;
1659 }
1660
1661 static const struct dev_pm_ops fimc_lite_pm_ops = {
1662 SET_SYSTEM_SLEEP_PM_OPS(fimc_lite_suspend, fimc_lite_resume)
1663 SET_RUNTIME_PM_OPS(fimc_lite_runtime_suspend, fimc_lite_runtime_resume,
1664 NULL)
1665 };
1666
1667 /* EXYNOS4212, EXYNOS4412 */
1668 static struct flite_drvdata fimc_lite_drvdata_exynos4 = {
1669 .max_width = 8192,
1670 .max_height = 8192,
1671 .out_width_align = 8,
1672 .win_hor_offs_align = 2,
1673 .out_hor_offs_align = 8,
1674 .max_dma_bufs = 1,
1675 .num_instances = 2,
1676 };
1677
1678 /* EXYNOS5250 */
1679 static struct flite_drvdata fimc_lite_drvdata_exynos5 = {
1680 .max_width = 8192,
1681 .max_height = 8192,
1682 .out_width_align = 8,
1683 .win_hor_offs_align = 2,
1684 .out_hor_offs_align = 8,
1685 .max_dma_bufs = 32,
1686 .num_instances = 3,
1687 };
1688
1689 static const struct of_device_id flite_of_match[] = {
1690 {
1691 .compatible = "samsung,exynos4212-fimc-lite",
1692 .data = &fimc_lite_drvdata_exynos4,
1693 },
1694 {
1695 .compatible = "samsung,exynos5250-fimc-lite",
1696 .data = &fimc_lite_drvdata_exynos5,
1697 },
1698 { /* sentinel */ },
1699 };
1700 MODULE_DEVICE_TABLE(of, flite_of_match);
1701
1702 static struct platform_driver fimc_lite_driver = {
1703 .probe = fimc_lite_probe,
1704 .remove = fimc_lite_remove,
1705 .driver = {
1706 .of_match_table = flite_of_match,
1707 .name = FIMC_LITE_DRV_NAME,
1708 .pm = &fimc_lite_pm_ops,
1709 }
1710 };
1711 module_platform_driver(fimc_lite_driver);
1712 MODULE_LICENSE("GPL");
1713 MODULE_ALIAS("platform:" FIMC_LITE_DRV_NAME);
Linux kernel - Deliverables
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