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[mirror_ubuntu-artful-kernel.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[], struct device *alloc_devs[])
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 return 0;
378 }
379
380 *num_planes = fmt->memplanes;
381
382 for (i = 0; i < fmt->memplanes; i++)
383 sizes[i] = (wh * fmt->depth[i]) / 8;
384
385 return 0;
386 }
387
388 static int buffer_prepare(struct vb2_buffer *vb)
389 {
390 struct vb2_queue *vq = vb->vb2_queue;
391 struct fimc_lite *fimc = vq->drv_priv;
392 int i;
393
394 if (fimc->out_frame.fmt == NULL)
395 return -EINVAL;
396
397 for (i = 0; i < fimc->out_frame.fmt->memplanes; i++) {
398 unsigned long size = fimc->payload[i];
399
400 if (vb2_plane_size(vb, i) < size) {
401 v4l2_err(&fimc->ve.vdev,
402 "User buffer too small (%ld < %ld)\n",
403 vb2_plane_size(vb, i), size);
404 return -EINVAL;
405 }
406 vb2_set_plane_payload(vb, i, size);
407 }
408
409 return 0;
410 }
411
412 static void buffer_queue(struct vb2_buffer *vb)
413 {
414 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
415 struct flite_buffer *buf
416 = container_of(vbuf, struct flite_buffer, vb);
417 struct fimc_lite *fimc = vb2_get_drv_priv(vb->vb2_queue);
418 unsigned long flags;
419
420 spin_lock_irqsave(&fimc->slock, flags);
421 buf->paddr = vb2_dma_contig_plane_dma_addr(vb, 0);
422
423 buf->index = fimc->buf_index++;
424 if (fimc->buf_index >= fimc->reqbufs_count)
425 fimc->buf_index = 0;
426
427 if (!test_bit(ST_FLITE_SUSPENDED, &fimc->state) &&
428 !test_bit(ST_FLITE_STREAM, &fimc->state) &&
429 list_empty(&fimc->active_buf_q)) {
430 flite_hw_set_dma_buffer(fimc, buf);
431 fimc_lite_active_queue_add(fimc, buf);
432 } else {
433 fimc_lite_pending_queue_add(fimc, buf);
434 }
435
436 if (vb2_is_streaming(&fimc->vb_queue) &&
437 !list_empty(&fimc->pending_buf_q) &&
438 !test_and_set_bit(ST_FLITE_STREAM, &fimc->state)) {
439 flite_hw_capture_start(fimc);
440 spin_unlock_irqrestore(&fimc->slock, flags);
441
442 if (!test_and_set_bit(ST_SENSOR_STREAM, &fimc->state))
443 fimc_pipeline_call(&fimc->ve, set_stream, 1);
444 return;
445 }
446 spin_unlock_irqrestore(&fimc->slock, flags);
447 }
448
449 static const struct vb2_ops fimc_lite_qops = {
450 .queue_setup = queue_setup,
451 .buf_prepare = buffer_prepare,
452 .buf_queue = buffer_queue,
453 .wait_prepare = vb2_ops_wait_prepare,
454 .wait_finish = vb2_ops_wait_finish,
455 .start_streaming = start_streaming,
456 .stop_streaming = stop_streaming,
457 };
458
459 static void fimc_lite_clear_event_counters(struct fimc_lite *fimc)
460 {
461 unsigned long flags;
462
463 spin_lock_irqsave(&fimc->slock, flags);
464 memset(&fimc->events, 0, sizeof(fimc->events));
465 spin_unlock_irqrestore(&fimc->slock, flags);
466 }
467
468 static int fimc_lite_open(struct file *file)
469 {
470 struct fimc_lite *fimc = video_drvdata(file);
471 struct media_entity *me = &fimc->ve.vdev.entity;
472 int ret;
473
474 mutex_lock(&fimc->lock);
475 if (atomic_read(&fimc->out_path) != FIMC_IO_DMA) {
476 ret = -EBUSY;
477 goto unlock;
478 }
479
480 set_bit(ST_FLITE_IN_USE, &fimc->state);
481 ret = pm_runtime_get_sync(&fimc->pdev->dev);
482 if (ret < 0)
483 goto unlock;
484
485 ret = v4l2_fh_open(file);
486 if (ret < 0)
487 goto err_pm;
488
489 if (!v4l2_fh_is_singular_file(file) ||
490 atomic_read(&fimc->out_path) != FIMC_IO_DMA)
491 goto unlock;
492
493 mutex_lock(&me->graph_obj.mdev->graph_mutex);
494
495 ret = fimc_pipeline_call(&fimc->ve, open, me, true);
496
497 /* Mark video pipeline ending at this video node as in use. */
498 if (ret == 0)
499 me->use_count++;
500
501 mutex_unlock(&me->graph_obj.mdev->graph_mutex);
502
503 if (!ret) {
504 fimc_lite_clear_event_counters(fimc);
505 goto unlock;
506 }
507
508 v4l2_fh_release(file);
509 err_pm:
510 pm_runtime_put_sync(&fimc->pdev->dev);
511 clear_bit(ST_FLITE_IN_USE, &fimc->state);
512 unlock:
513 mutex_unlock(&fimc->lock);
514 return ret;
515 }
516
517 static int fimc_lite_release(struct file *file)
518 {
519 struct fimc_lite *fimc = video_drvdata(file);
520 struct media_entity *entity = &fimc->ve.vdev.entity;
521
522 mutex_lock(&fimc->lock);
523
524 if (v4l2_fh_is_singular_file(file) &&
525 atomic_read(&fimc->out_path) == FIMC_IO_DMA) {
526 if (fimc->streaming) {
527 media_entity_pipeline_stop(entity);
528 fimc->streaming = false;
529 }
530 fimc_lite_stop_capture(fimc, false);
531 fimc_pipeline_call(&fimc->ve, close);
532 clear_bit(ST_FLITE_IN_USE, &fimc->state);
533
534 mutex_lock(&entity->graph_obj.mdev->graph_mutex);
535 entity->use_count--;
536 mutex_unlock(&entity->graph_obj.mdev->graph_mutex);
537 }
538
539 _vb2_fop_release(file, NULL);
540 pm_runtime_put(&fimc->pdev->dev);
541 clear_bit(ST_FLITE_SUSPENDED, &fimc->state);
542
543 mutex_unlock(&fimc->lock);
544 return 0;
545 }
546
547 static const struct v4l2_file_operations fimc_lite_fops = {
548 .owner = THIS_MODULE,
549 .open = fimc_lite_open,
550 .release = fimc_lite_release,
551 .poll = vb2_fop_poll,
552 .unlocked_ioctl = video_ioctl2,
553 .mmap = vb2_fop_mmap,
554 };
555
556 /*
557 * Format and crop negotiation helpers
558 */
559
560 static const struct fimc_fmt *fimc_lite_subdev_try_fmt(struct fimc_lite *fimc,
561 struct v4l2_subdev_pad_config *cfg,
562 struct v4l2_subdev_format *format)
563 {
564 struct flite_drvdata *dd = fimc->dd;
565 struct v4l2_mbus_framefmt *mf = &format->format;
566 const struct fimc_fmt *fmt = NULL;
567
568 if (format->pad == FLITE_SD_PAD_SINK) {
569 v4l_bound_align_image(&mf->width, 8, dd->max_width,
570 ffs(dd->out_width_align) - 1,
571 &mf->height, 0, dd->max_height, 0, 0);
572
573 fmt = fimc_lite_find_format(NULL, &mf->code, 0, 0);
574 if (WARN_ON(!fmt))
575 return NULL;
576
577 mf->colorspace = fmt->colorspace;
578 mf->code = fmt->mbus_code;
579 } else {
580 struct flite_frame *sink = &fimc->inp_frame;
581 struct v4l2_mbus_framefmt *sink_fmt;
582 struct v4l2_rect *rect;
583
584 if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
585 sink_fmt = v4l2_subdev_get_try_format(&fimc->subdev, cfg,
586 FLITE_SD_PAD_SINK);
587
588 mf->code = sink_fmt->code;
589 mf->colorspace = sink_fmt->colorspace;
590
591 rect = v4l2_subdev_get_try_crop(&fimc->subdev, cfg,
592 FLITE_SD_PAD_SINK);
593 } else {
594 mf->code = sink->fmt->mbus_code;
595 mf->colorspace = sink->fmt->colorspace;
596 rect = &sink->rect;
597 }
598
599 /* Allow changing format only on sink pad */
600 mf->width = rect->width;
601 mf->height = rect->height;
602 }
603
604 mf->field = V4L2_FIELD_NONE;
605
606 v4l2_dbg(1, debug, &fimc->subdev, "code: %#x (%d), %dx%d\n",
607 mf->code, mf->colorspace, mf->width, mf->height);
608
609 return fmt;
610 }
611
612 static void fimc_lite_try_crop(struct fimc_lite *fimc, struct v4l2_rect *r)
613 {
614 struct flite_frame *frame = &fimc->inp_frame;
615
616 v4l_bound_align_image(&r->width, 0, frame->f_width, 0,
617 &r->height, 0, frame->f_height, 0, 0);
618
619 /* Adjust left/top if cropping rectangle got out of bounds */
620 r->left = clamp_t(u32, r->left, 0, frame->f_width - r->width);
621 r->left = round_down(r->left, fimc->dd->win_hor_offs_align);
622 r->top = clamp_t(u32, r->top, 0, frame->f_height - r->height);
623
624 v4l2_dbg(1, debug, &fimc->subdev, "(%d,%d)/%dx%d, sink fmt: %dx%d\n",
625 r->left, r->top, r->width, r->height,
626 frame->f_width, frame->f_height);
627 }
628
629 static void fimc_lite_try_compose(struct fimc_lite *fimc, struct v4l2_rect *r)
630 {
631 struct flite_frame *frame = &fimc->out_frame;
632 struct v4l2_rect *crop_rect = &fimc->inp_frame.rect;
633
634 /* Scaling is not supported so we enforce compose rectangle size
635 same as size of the sink crop rectangle. */
636 r->width = crop_rect->width;
637 r->height = crop_rect->height;
638
639 /* Adjust left/top if the composing rectangle got out of bounds */
640 r->left = clamp_t(u32, r->left, 0, frame->f_width - r->width);
641 r->left = round_down(r->left, fimc->dd->out_hor_offs_align);
642 r->top = clamp_t(u32, r->top, 0, fimc->out_frame.f_height - r->height);
643
644 v4l2_dbg(1, debug, &fimc->subdev, "(%d,%d)/%dx%d, source fmt: %dx%d\n",
645 r->left, r->top, r->width, r->height,
646 frame->f_width, frame->f_height);
647 }
648
649 /*
650 * Video node ioctl operations
651 */
652 static int fimc_lite_querycap(struct file *file, void *priv,
653 struct v4l2_capability *cap)
654 {
655 struct fimc_lite *fimc = video_drvdata(file);
656
657 strlcpy(cap->driver, FIMC_LITE_DRV_NAME, sizeof(cap->driver));
658 strlcpy(cap->card, FIMC_LITE_DRV_NAME, sizeof(cap->card));
659 snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
660 dev_name(&fimc->pdev->dev));
661
662 cap->device_caps = V4L2_CAP_STREAMING;
663 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
664 return 0;
665 }
666
667 static int fimc_lite_enum_fmt_mplane(struct file *file, void *priv,
668 struct v4l2_fmtdesc *f)
669 {
670 const struct fimc_fmt *fmt;
671
672 if (f->index >= ARRAY_SIZE(fimc_lite_formats))
673 return -EINVAL;
674
675 fmt = &fimc_lite_formats[f->index];
676 strlcpy(f->description, fmt->name, sizeof(f->description));
677 f->pixelformat = fmt->fourcc;
678
679 return 0;
680 }
681
682 static int fimc_lite_g_fmt_mplane(struct file *file, void *fh,
683 struct v4l2_format *f)
684 {
685 struct fimc_lite *fimc = video_drvdata(file);
686 struct v4l2_pix_format_mplane *pixm = &f->fmt.pix_mp;
687 struct v4l2_plane_pix_format *plane_fmt = &pixm->plane_fmt[0];
688 struct flite_frame *frame = &fimc->out_frame;
689 const struct fimc_fmt *fmt = frame->fmt;
690
691 plane_fmt->bytesperline = (frame->f_width * fmt->depth[0]) / 8;
692 plane_fmt->sizeimage = plane_fmt->bytesperline * frame->f_height;
693
694 pixm->num_planes = fmt->memplanes;
695 pixm->pixelformat = fmt->fourcc;
696 pixm->width = frame->f_width;
697 pixm->height = frame->f_height;
698 pixm->field = V4L2_FIELD_NONE;
699 pixm->colorspace = fmt->colorspace;
700 return 0;
701 }
702
703 static int fimc_lite_try_fmt(struct fimc_lite *fimc,
704 struct v4l2_pix_format_mplane *pixm,
705 const struct fimc_fmt **ffmt)
706 {
707 u32 bpl = pixm->plane_fmt[0].bytesperline;
708 struct flite_drvdata *dd = fimc->dd;
709 const struct fimc_fmt *inp_fmt = fimc->inp_frame.fmt;
710 const struct fimc_fmt *fmt;
711
712 if (WARN_ON(inp_fmt == NULL))
713 return -EINVAL;
714 /*
715 * We allow some flexibility only for YUV formats. In case of raw
716 * raw Bayer the FIMC-LITE's output format must match its camera
717 * interface input format.
718 */
719 if (inp_fmt->flags & FMT_FLAGS_YUV)
720 fmt = fimc_lite_find_format(&pixm->pixelformat, NULL,
721 inp_fmt->flags, 0);
722 else
723 fmt = inp_fmt;
724
725 if (WARN_ON(fmt == NULL))
726 return -EINVAL;
727 if (ffmt)
728 *ffmt = fmt;
729 v4l_bound_align_image(&pixm->width, 8, dd->max_width,
730 ffs(dd->out_width_align) - 1,
731 &pixm->height, 0, dd->max_height, 0, 0);
732
733 if ((bpl == 0 || ((bpl * 8) / fmt->depth[0]) < pixm->width))
734 pixm->plane_fmt[0].bytesperline = (pixm->width *
735 fmt->depth[0]) / 8;
736
737 if (pixm->plane_fmt[0].sizeimage == 0)
738 pixm->plane_fmt[0].sizeimage = (pixm->width * pixm->height *
739 fmt->depth[0]) / 8;
740 pixm->num_planes = fmt->memplanes;
741 pixm->pixelformat = fmt->fourcc;
742 pixm->colorspace = fmt->colorspace;
743 pixm->field = V4L2_FIELD_NONE;
744 return 0;
745 }
746
747 static int fimc_lite_try_fmt_mplane(struct file *file, void *fh,
748 struct v4l2_format *f)
749 {
750 struct fimc_lite *fimc = video_drvdata(file);
751 return fimc_lite_try_fmt(fimc, &f->fmt.pix_mp, NULL);
752 }
753
754 static int fimc_lite_s_fmt_mplane(struct file *file, void *priv,
755 struct v4l2_format *f)
756 {
757 struct v4l2_pix_format_mplane *pixm = &f->fmt.pix_mp;
758 struct fimc_lite *fimc = video_drvdata(file);
759 struct flite_frame *frame = &fimc->out_frame;
760 const struct fimc_fmt *fmt = NULL;
761 int ret;
762
763 if (vb2_is_busy(&fimc->vb_queue))
764 return -EBUSY;
765
766 ret = fimc_lite_try_fmt(fimc, &f->fmt.pix_mp, &fmt);
767 if (ret < 0)
768 return ret;
769
770 frame->fmt = fmt;
771 fimc->payload[0] = max((pixm->width * pixm->height * fmt->depth[0]) / 8,
772 pixm->plane_fmt[0].sizeimage);
773 frame->f_width = pixm->width;
774 frame->f_height = pixm->height;
775
776 return 0;
777 }
778
779 static int fimc_pipeline_validate(struct fimc_lite *fimc)
780 {
781 struct v4l2_subdev *sd = &fimc->subdev;
782 struct v4l2_subdev_format sink_fmt, src_fmt;
783 struct media_pad *pad;
784 int ret;
785
786 while (1) {
787 /* Retrieve format at the sink pad */
788 pad = &sd->entity.pads[0];
789 if (!(pad->flags & MEDIA_PAD_FL_SINK))
790 break;
791 /* Don't call FIMC subdev operation to avoid nested locking */
792 if (sd == &fimc->subdev) {
793 struct flite_frame *ff = &fimc->out_frame;
794 sink_fmt.format.width = ff->f_width;
795 sink_fmt.format.height = ff->f_height;
796 sink_fmt.format.code = fimc->inp_frame.fmt->mbus_code;
797 } else {
798 sink_fmt.pad = pad->index;
799 sink_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
800 ret = v4l2_subdev_call(sd, pad, get_fmt, NULL,
801 &sink_fmt);
802 if (ret < 0 && ret != -ENOIOCTLCMD)
803 return -EPIPE;
804 }
805 /* Retrieve format at the source pad */
806 pad = media_entity_remote_pad(pad);
807 if (!pad || !is_media_entity_v4l2_subdev(pad->entity))
808 break;
809
810 sd = media_entity_to_v4l2_subdev(pad->entity);
811 src_fmt.pad = pad->index;
812 src_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
813 ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &src_fmt);
814 if (ret < 0 && ret != -ENOIOCTLCMD)
815 return -EPIPE;
816
817 if (src_fmt.format.width != sink_fmt.format.width ||
818 src_fmt.format.height != sink_fmt.format.height ||
819 src_fmt.format.code != sink_fmt.format.code)
820 return -EPIPE;
821 }
822 return 0;
823 }
824
825 static int fimc_lite_streamon(struct file *file, void *priv,
826 enum v4l2_buf_type type)
827 {
828 struct fimc_lite *fimc = video_drvdata(file);
829 struct media_entity *entity = &fimc->ve.vdev.entity;
830 int ret;
831
832 if (fimc_lite_active(fimc))
833 return -EBUSY;
834
835 ret = media_entity_pipeline_start(entity, &fimc->ve.pipe->mp);
836 if (ret < 0)
837 return ret;
838
839 ret = fimc_pipeline_validate(fimc);
840 if (ret < 0)
841 goto err_p_stop;
842
843 fimc->sensor = fimc_find_remote_sensor(&fimc->subdev.entity);
844
845 ret = vb2_ioctl_streamon(file, priv, type);
846 if (!ret) {
847 fimc->streaming = true;
848 return ret;
849 }
850
851 err_p_stop:
852 media_entity_pipeline_stop(entity);
853 return 0;
854 }
855
856 static int fimc_lite_streamoff(struct file *file, void *priv,
857 enum v4l2_buf_type type)
858 {
859 struct fimc_lite *fimc = video_drvdata(file);
860 int ret;
861
862 ret = vb2_ioctl_streamoff(file, priv, type);
863 if (ret < 0)
864 return ret;
865
866 media_entity_pipeline_stop(&fimc->ve.vdev.entity);
867 fimc->streaming = false;
868 return 0;
869 }
870
871 static int fimc_lite_reqbufs(struct file *file, void *priv,
872 struct v4l2_requestbuffers *reqbufs)
873 {
874 struct fimc_lite *fimc = video_drvdata(file);
875 int ret;
876
877 reqbufs->count = max_t(u32, FLITE_REQ_BUFS_MIN, reqbufs->count);
878 ret = vb2_ioctl_reqbufs(file, priv, reqbufs);
879 if (!ret)
880 fimc->reqbufs_count = reqbufs->count;
881
882 return ret;
883 }
884
885 /* Return 1 if rectangle a is enclosed in rectangle b, or 0 otherwise. */
886 static int enclosed_rectangle(struct v4l2_rect *a, struct v4l2_rect *b)
887 {
888 if (a->left < b->left || a->top < b->top)
889 return 0;
890 if (a->left + a->width > b->left + b->width)
891 return 0;
892 if (a->top + a->height > b->top + b->height)
893 return 0;
894
895 return 1;
896 }
897
898 static int fimc_lite_g_selection(struct file *file, void *fh,
899 struct v4l2_selection *sel)
900 {
901 struct fimc_lite *fimc = video_drvdata(file);
902 struct flite_frame *f = &fimc->out_frame;
903
904 if (sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
905 return -EINVAL;
906
907 switch (sel->target) {
908 case V4L2_SEL_TGT_COMPOSE_BOUNDS:
909 case V4L2_SEL_TGT_COMPOSE_DEFAULT:
910 sel->r.left = 0;
911 sel->r.top = 0;
912 sel->r.width = f->f_width;
913 sel->r.height = f->f_height;
914 return 0;
915
916 case V4L2_SEL_TGT_COMPOSE:
917 sel->r = f->rect;
918 return 0;
919 }
920
921 return -EINVAL;
922 }
923
924 static int fimc_lite_s_selection(struct file *file, void *fh,
925 struct v4l2_selection *sel)
926 {
927 struct fimc_lite *fimc = video_drvdata(file);
928 struct flite_frame *f = &fimc->out_frame;
929 struct v4l2_rect rect = sel->r;
930 unsigned long flags;
931
932 if (sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE ||
933 sel->target != V4L2_SEL_TGT_COMPOSE)
934 return -EINVAL;
935
936 fimc_lite_try_compose(fimc, &rect);
937
938 if ((sel->flags & V4L2_SEL_FLAG_LE) &&
939 !enclosed_rectangle(&rect, &sel->r))
940 return -ERANGE;
941
942 if ((sel->flags & V4L2_SEL_FLAG_GE) &&
943 !enclosed_rectangle(&sel->r, &rect))
944 return -ERANGE;
945
946 sel->r = rect;
947 spin_lock_irqsave(&fimc->slock, flags);
948 f->rect = rect;
949 set_bit(ST_FLITE_CONFIG, &fimc->state);
950 spin_unlock_irqrestore(&fimc->slock, flags);
951
952 return 0;
953 }
954
955 static const struct v4l2_ioctl_ops fimc_lite_ioctl_ops = {
956 .vidioc_querycap = fimc_lite_querycap,
957 .vidioc_enum_fmt_vid_cap_mplane = fimc_lite_enum_fmt_mplane,
958 .vidioc_try_fmt_vid_cap_mplane = fimc_lite_try_fmt_mplane,
959 .vidioc_s_fmt_vid_cap_mplane = fimc_lite_s_fmt_mplane,
960 .vidioc_g_fmt_vid_cap_mplane = fimc_lite_g_fmt_mplane,
961 .vidioc_g_selection = fimc_lite_g_selection,
962 .vidioc_s_selection = fimc_lite_s_selection,
963 .vidioc_reqbufs = fimc_lite_reqbufs,
964 .vidioc_querybuf = vb2_ioctl_querybuf,
965 .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
966 .vidioc_create_bufs = vb2_ioctl_create_bufs,
967 .vidioc_qbuf = vb2_ioctl_qbuf,
968 .vidioc_dqbuf = vb2_ioctl_dqbuf,
969 .vidioc_streamon = fimc_lite_streamon,
970 .vidioc_streamoff = fimc_lite_streamoff,
971 };
972
973 /* Capture subdev media entity operations */
974 static int fimc_lite_link_setup(struct media_entity *entity,
975 const struct media_pad *local,
976 const struct media_pad *remote, u32 flags)
977 {
978 struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity);
979 struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
980 int ret = 0;
981
982 if (WARN_ON(fimc == NULL))
983 return 0;
984
985 v4l2_dbg(1, debug, sd, "%s: %s --> %s, flags: 0x%x. source_id: 0x%x\n",
986 __func__, remote->entity->name, local->entity->name,
987 flags, fimc->source_subdev_grp_id);
988
989 switch (local->index) {
990 case FLITE_SD_PAD_SINK:
991 if (flags & MEDIA_LNK_FL_ENABLED) {
992 if (fimc->source_subdev_grp_id == 0)
993 fimc->source_subdev_grp_id = sd->grp_id;
994 else
995 ret = -EBUSY;
996 } else {
997 fimc->source_subdev_grp_id = 0;
998 fimc->sensor = NULL;
999 }
1000 break;
1001
1002 case FLITE_SD_PAD_SOURCE_DMA:
1003 if (!(flags & MEDIA_LNK_FL_ENABLED))
1004 atomic_set(&fimc->out_path, FIMC_IO_NONE);
1005 else
1006 atomic_set(&fimc->out_path, FIMC_IO_DMA);
1007 break;
1008
1009 case FLITE_SD_PAD_SOURCE_ISP:
1010 if (!(flags & MEDIA_LNK_FL_ENABLED))
1011 atomic_set(&fimc->out_path, FIMC_IO_NONE);
1012 else
1013 atomic_set(&fimc->out_path, FIMC_IO_ISP);
1014 break;
1015
1016 default:
1017 v4l2_err(sd, "Invalid pad index\n");
1018 ret = -EINVAL;
1019 }
1020 mb();
1021
1022 return ret;
1023 }
1024
1025 static const struct media_entity_operations fimc_lite_subdev_media_ops = {
1026 .link_setup = fimc_lite_link_setup,
1027 };
1028
1029 static int fimc_lite_subdev_enum_mbus_code(struct v4l2_subdev *sd,
1030 struct v4l2_subdev_pad_config *cfg,
1031 struct v4l2_subdev_mbus_code_enum *code)
1032 {
1033 const struct fimc_fmt *fmt;
1034
1035 fmt = fimc_lite_find_format(NULL, NULL, 0, code->index);
1036 if (!fmt)
1037 return -EINVAL;
1038 code->code = fmt->mbus_code;
1039 return 0;
1040 }
1041
1042 static struct v4l2_mbus_framefmt *__fimc_lite_subdev_get_try_fmt(
1043 struct v4l2_subdev *sd,
1044 struct v4l2_subdev_pad_config *cfg, unsigned int pad)
1045 {
1046 if (pad != FLITE_SD_PAD_SINK)
1047 pad = FLITE_SD_PAD_SOURCE_DMA;
1048
1049 return v4l2_subdev_get_try_format(sd, cfg, pad);
1050 }
1051
1052 static int fimc_lite_subdev_get_fmt(struct v4l2_subdev *sd,
1053 struct v4l2_subdev_pad_config *cfg,
1054 struct v4l2_subdev_format *fmt)
1055 {
1056 struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1057 struct v4l2_mbus_framefmt *mf = &fmt->format;
1058 struct flite_frame *f = &fimc->inp_frame;
1059
1060 if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
1061 mf = __fimc_lite_subdev_get_try_fmt(sd, cfg, fmt->pad);
1062 fmt->format = *mf;
1063 return 0;
1064 }
1065
1066 mutex_lock(&fimc->lock);
1067 mf->colorspace = f->fmt->colorspace;
1068 mf->code = f->fmt->mbus_code;
1069
1070 if (fmt->pad == FLITE_SD_PAD_SINK) {
1071 /* full camera input frame size */
1072 mf->width = f->f_width;
1073 mf->height = f->f_height;
1074 } else {
1075 /* crop size */
1076 mf->width = f->rect.width;
1077 mf->height = f->rect.height;
1078 }
1079 mutex_unlock(&fimc->lock);
1080 return 0;
1081 }
1082
1083 static int fimc_lite_subdev_set_fmt(struct v4l2_subdev *sd,
1084 struct v4l2_subdev_pad_config *cfg,
1085 struct v4l2_subdev_format *fmt)
1086 {
1087 struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1088 struct v4l2_mbus_framefmt *mf = &fmt->format;
1089 struct flite_frame *sink = &fimc->inp_frame;
1090 struct flite_frame *source = &fimc->out_frame;
1091 const struct fimc_fmt *ffmt;
1092
1093 v4l2_dbg(1, debug, sd, "pad%d: code: 0x%x, %dx%d\n",
1094 fmt->pad, mf->code, mf->width, mf->height);
1095
1096 mutex_lock(&fimc->lock);
1097
1098 if ((atomic_read(&fimc->out_path) == FIMC_IO_ISP &&
1099 sd->entity.stream_count > 0) ||
1100 (atomic_read(&fimc->out_path) == FIMC_IO_DMA &&
1101 vb2_is_busy(&fimc->vb_queue))) {
1102 mutex_unlock(&fimc->lock);
1103 return -EBUSY;
1104 }
1105
1106 ffmt = fimc_lite_subdev_try_fmt(fimc, cfg, fmt);
1107
1108 if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
1109 struct v4l2_mbus_framefmt *src_fmt;
1110
1111 mf = __fimc_lite_subdev_get_try_fmt(sd, cfg, fmt->pad);
1112 *mf = fmt->format;
1113
1114 if (fmt->pad == FLITE_SD_PAD_SINK) {
1115 unsigned int pad = FLITE_SD_PAD_SOURCE_DMA;
1116 src_fmt = __fimc_lite_subdev_get_try_fmt(sd, cfg, pad);
1117 *src_fmt = *mf;
1118 }
1119
1120 mutex_unlock(&fimc->lock);
1121 return 0;
1122 }
1123
1124 if (fmt->pad == FLITE_SD_PAD_SINK) {
1125 sink->f_width = mf->width;
1126 sink->f_height = mf->height;
1127 sink->fmt = ffmt;
1128 /* Set sink crop rectangle */
1129 sink->rect.width = mf->width;
1130 sink->rect.height = mf->height;
1131 sink->rect.left = 0;
1132 sink->rect.top = 0;
1133 /* Reset source format and crop rectangle */
1134 source->rect = sink->rect;
1135 source->f_width = mf->width;
1136 source->f_height = mf->height;
1137 }
1138
1139 mutex_unlock(&fimc->lock);
1140 return 0;
1141 }
1142
1143 static int fimc_lite_subdev_get_selection(struct v4l2_subdev *sd,
1144 struct v4l2_subdev_pad_config *cfg,
1145 struct v4l2_subdev_selection *sel)
1146 {
1147 struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1148 struct flite_frame *f = &fimc->inp_frame;
1149
1150 if ((sel->target != V4L2_SEL_TGT_CROP &&
1151 sel->target != V4L2_SEL_TGT_CROP_BOUNDS) ||
1152 sel->pad != FLITE_SD_PAD_SINK)
1153 return -EINVAL;
1154
1155 if (sel->which == V4L2_SUBDEV_FORMAT_TRY) {
1156 sel->r = *v4l2_subdev_get_try_crop(sd, cfg, sel->pad);
1157 return 0;
1158 }
1159
1160 mutex_lock(&fimc->lock);
1161 if (sel->target == V4L2_SEL_TGT_CROP) {
1162 sel->r = f->rect;
1163 } else {
1164 sel->r.left = 0;
1165 sel->r.top = 0;
1166 sel->r.width = f->f_width;
1167 sel->r.height = f->f_height;
1168 }
1169 mutex_unlock(&fimc->lock);
1170
1171 v4l2_dbg(1, debug, sd, "%s: (%d,%d) %dx%d, f_w: %d, f_h: %d\n",
1172 __func__, f->rect.left, f->rect.top, f->rect.width,
1173 f->rect.height, f->f_width, f->f_height);
1174
1175 return 0;
1176 }
1177
1178 static int fimc_lite_subdev_set_selection(struct v4l2_subdev *sd,
1179 struct v4l2_subdev_pad_config *cfg,
1180 struct v4l2_subdev_selection *sel)
1181 {
1182 struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1183 struct flite_frame *f = &fimc->inp_frame;
1184 int ret = 0;
1185
1186 if (sel->target != V4L2_SEL_TGT_CROP || sel->pad != FLITE_SD_PAD_SINK)
1187 return -EINVAL;
1188
1189 mutex_lock(&fimc->lock);
1190 fimc_lite_try_crop(fimc, &sel->r);
1191
1192 if (sel->which == V4L2_SUBDEV_FORMAT_TRY) {
1193 *v4l2_subdev_get_try_crop(sd, cfg, sel->pad) = sel->r;
1194 } else {
1195 unsigned long flags;
1196 spin_lock_irqsave(&fimc->slock, flags);
1197 f->rect = sel->r;
1198 /* Same crop rectangle on the source pad */
1199 fimc->out_frame.rect = sel->r;
1200 set_bit(ST_FLITE_CONFIG, &fimc->state);
1201 spin_unlock_irqrestore(&fimc->slock, flags);
1202 }
1203 mutex_unlock(&fimc->lock);
1204
1205 v4l2_dbg(1, debug, sd, "%s: (%d,%d) %dx%d, f_w: %d, f_h: %d\n",
1206 __func__, f->rect.left, f->rect.top, f->rect.width,
1207 f->rect.height, f->f_width, f->f_height);
1208
1209 return ret;
1210 }
1211
1212 static int fimc_lite_subdev_s_stream(struct v4l2_subdev *sd, int on)
1213 {
1214 struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1215 unsigned long flags;
1216 int ret;
1217
1218 /*
1219 * Find sensor subdev linked to FIMC-LITE directly or through
1220 * MIPI-CSIS. This is required for configuration where FIMC-LITE
1221 * is used as a subdev only and feeds data internally to FIMC-IS.
1222 * The pipeline links are protected through entity.stream_count
1223 * so there is no need to take the media graph mutex here.
1224 */
1225 fimc->sensor = fimc_find_remote_sensor(&sd->entity);
1226
1227 if (atomic_read(&fimc->out_path) != FIMC_IO_ISP)
1228 return -ENOIOCTLCMD;
1229
1230 mutex_lock(&fimc->lock);
1231 if (on) {
1232 flite_hw_reset(fimc);
1233 ret = fimc_lite_hw_init(fimc, true);
1234 if (!ret) {
1235 spin_lock_irqsave(&fimc->slock, flags);
1236 flite_hw_capture_start(fimc);
1237 spin_unlock_irqrestore(&fimc->slock, flags);
1238 }
1239 } else {
1240 set_bit(ST_FLITE_OFF, &fimc->state);
1241
1242 spin_lock_irqsave(&fimc->slock, flags);
1243 flite_hw_capture_stop(fimc);
1244 spin_unlock_irqrestore(&fimc->slock, flags);
1245
1246 ret = wait_event_timeout(fimc->irq_queue,
1247 !test_bit(ST_FLITE_OFF, &fimc->state),
1248 msecs_to_jiffies(200));
1249 if (ret == 0)
1250 v4l2_err(sd, "s_stream(0) timeout\n");
1251 clear_bit(ST_FLITE_RUN, &fimc->state);
1252 }
1253
1254 mutex_unlock(&fimc->lock);
1255 return ret;
1256 }
1257
1258 static int fimc_lite_log_status(struct v4l2_subdev *sd)
1259 {
1260 struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1261
1262 flite_hw_dump_regs(fimc, __func__);
1263 return 0;
1264 }
1265
1266 static int fimc_lite_subdev_registered(struct v4l2_subdev *sd)
1267 {
1268 struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1269 struct vb2_queue *q = &fimc->vb_queue;
1270 struct video_device *vfd = &fimc->ve.vdev;
1271 int ret;
1272
1273 memset(vfd, 0, sizeof(*vfd));
1274 atomic_set(&fimc->out_path, FIMC_IO_DMA);
1275
1276 snprintf(vfd->name, sizeof(vfd->name), "fimc-lite.%d.capture",
1277 fimc->index);
1278
1279 vfd->fops = &fimc_lite_fops;
1280 vfd->ioctl_ops = &fimc_lite_ioctl_ops;
1281 vfd->v4l2_dev = sd->v4l2_dev;
1282 vfd->minor = -1;
1283 vfd->release = video_device_release_empty;
1284 vfd->queue = q;
1285 fimc->reqbufs_count = 0;
1286
1287 INIT_LIST_HEAD(&fimc->pending_buf_q);
1288 INIT_LIST_HEAD(&fimc->active_buf_q);
1289
1290 memset(q, 0, sizeof(*q));
1291 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
1292 q->io_modes = VB2_MMAP | VB2_USERPTR;
1293 q->ops = &fimc_lite_qops;
1294 q->mem_ops = &vb2_dma_contig_memops;
1295 q->buf_struct_size = sizeof(struct flite_buffer);
1296 q->drv_priv = fimc;
1297 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1298 q->lock = &fimc->lock;
1299 q->dev = &fimc->pdev->dev;
1300
1301 ret = vb2_queue_init(q);
1302 if (ret < 0)
1303 return ret;
1304
1305 fimc->vd_pad.flags = MEDIA_PAD_FL_SINK;
1306 ret = media_entity_pads_init(&vfd->entity, 1, &fimc->vd_pad);
1307 if (ret < 0)
1308 return ret;
1309
1310 video_set_drvdata(vfd, fimc);
1311 fimc->ve.pipe = v4l2_get_subdev_hostdata(sd);
1312
1313 ret = video_register_device(vfd, VFL_TYPE_GRABBER, -1);
1314 if (ret < 0) {
1315 media_entity_cleanup(&vfd->entity);
1316 fimc->ve.pipe = NULL;
1317 return ret;
1318 }
1319
1320 v4l2_info(sd->v4l2_dev, "Registered %s as /dev/%s\n",
1321 vfd->name, video_device_node_name(vfd));
1322 return 0;
1323 }
1324
1325 static void fimc_lite_subdev_unregistered(struct v4l2_subdev *sd)
1326 {
1327 struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1328
1329 if (fimc == NULL)
1330 return;
1331
1332 mutex_lock(&fimc->lock);
1333
1334 if (video_is_registered(&fimc->ve.vdev)) {
1335 video_unregister_device(&fimc->ve.vdev);
1336 media_entity_cleanup(&fimc->ve.vdev.entity);
1337 fimc->ve.pipe = NULL;
1338 }
1339
1340 mutex_unlock(&fimc->lock);
1341 }
1342
1343 static const struct v4l2_subdev_internal_ops fimc_lite_subdev_internal_ops = {
1344 .registered = fimc_lite_subdev_registered,
1345 .unregistered = fimc_lite_subdev_unregistered,
1346 };
1347
1348 static const struct v4l2_subdev_pad_ops fimc_lite_subdev_pad_ops = {
1349 .enum_mbus_code = fimc_lite_subdev_enum_mbus_code,
1350 .get_selection = fimc_lite_subdev_get_selection,
1351 .set_selection = fimc_lite_subdev_set_selection,
1352 .get_fmt = fimc_lite_subdev_get_fmt,
1353 .set_fmt = fimc_lite_subdev_set_fmt,
1354 };
1355
1356 static const struct v4l2_subdev_video_ops fimc_lite_subdev_video_ops = {
1357 .s_stream = fimc_lite_subdev_s_stream,
1358 };
1359
1360 static const struct v4l2_subdev_core_ops fimc_lite_core_ops = {
1361 .log_status = fimc_lite_log_status,
1362 };
1363
1364 static struct v4l2_subdev_ops fimc_lite_subdev_ops = {
1365 .core = &fimc_lite_core_ops,
1366 .video = &fimc_lite_subdev_video_ops,
1367 .pad = &fimc_lite_subdev_pad_ops,
1368 };
1369
1370 static int fimc_lite_s_ctrl(struct v4l2_ctrl *ctrl)
1371 {
1372 struct fimc_lite *fimc = container_of(ctrl->handler, struct fimc_lite,
1373 ctrl_handler);
1374 set_bit(ST_FLITE_CONFIG, &fimc->state);
1375 return 0;
1376 }
1377
1378 static const struct v4l2_ctrl_ops fimc_lite_ctrl_ops = {
1379 .s_ctrl = fimc_lite_s_ctrl,
1380 };
1381
1382 static const struct v4l2_ctrl_config fimc_lite_ctrl = {
1383 .ops = &fimc_lite_ctrl_ops,
1384 .id = V4L2_CTRL_CLASS_USER | 0x1001,
1385 .type = V4L2_CTRL_TYPE_BOOLEAN,
1386 .name = "Test Pattern 640x480",
1387 .step = 1,
1388 };
1389
1390 static void fimc_lite_set_default_config(struct fimc_lite *fimc)
1391 {
1392 struct flite_frame *sink = &fimc->inp_frame;
1393 struct flite_frame *source = &fimc->out_frame;
1394
1395 sink->fmt = &fimc_lite_formats[0];
1396 sink->f_width = FLITE_DEFAULT_WIDTH;
1397 sink->f_height = FLITE_DEFAULT_HEIGHT;
1398
1399 sink->rect.width = FLITE_DEFAULT_WIDTH;
1400 sink->rect.height = FLITE_DEFAULT_HEIGHT;
1401 sink->rect.left = 0;
1402 sink->rect.top = 0;
1403
1404 *source = *sink;
1405 }
1406
1407 static int fimc_lite_create_capture_subdev(struct fimc_lite *fimc)
1408 {
1409 struct v4l2_ctrl_handler *handler = &fimc->ctrl_handler;
1410 struct v4l2_subdev *sd = &fimc->subdev;
1411 int ret;
1412
1413 v4l2_subdev_init(sd, &fimc_lite_subdev_ops);
1414 sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
1415 snprintf(sd->name, sizeof(sd->name), "FIMC-LITE.%d", fimc->index);
1416
1417 fimc->subdev_pads[FLITE_SD_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
1418 fimc->subdev_pads[FLITE_SD_PAD_SOURCE_DMA].flags = MEDIA_PAD_FL_SOURCE;
1419 fimc->subdev_pads[FLITE_SD_PAD_SOURCE_ISP].flags = MEDIA_PAD_FL_SOURCE;
1420 ret = media_entity_pads_init(&sd->entity, FLITE_SD_PADS_NUM,
1421 fimc->subdev_pads);
1422 if (ret)
1423 return ret;
1424
1425 v4l2_ctrl_handler_init(handler, 1);
1426 fimc->test_pattern = v4l2_ctrl_new_custom(handler, &fimc_lite_ctrl,
1427 NULL);
1428 if (handler->error) {
1429 media_entity_cleanup(&sd->entity);
1430 return handler->error;
1431 }
1432
1433 sd->ctrl_handler = handler;
1434 sd->internal_ops = &fimc_lite_subdev_internal_ops;
1435 sd->entity.function = MEDIA_ENT_F_PROC_VIDEO_SCALER;
1436 sd->entity.ops = &fimc_lite_subdev_media_ops;
1437 sd->owner = THIS_MODULE;
1438 v4l2_set_subdevdata(sd, fimc);
1439
1440 return 0;
1441 }
1442
1443 static void fimc_lite_unregister_capture_subdev(struct fimc_lite *fimc)
1444 {
1445 struct v4l2_subdev *sd = &fimc->subdev;
1446
1447 v4l2_device_unregister_subdev(sd);
1448 media_entity_cleanup(&sd->entity);
1449 v4l2_ctrl_handler_free(&fimc->ctrl_handler);
1450 v4l2_set_subdevdata(sd, NULL);
1451 }
1452
1453 static void fimc_lite_clk_put(struct fimc_lite *fimc)
1454 {
1455 if (IS_ERR(fimc->clock))
1456 return;
1457
1458 clk_put(fimc->clock);
1459 fimc->clock = ERR_PTR(-EINVAL);
1460 }
1461
1462 static int fimc_lite_clk_get(struct fimc_lite *fimc)
1463 {
1464 fimc->clock = clk_get(&fimc->pdev->dev, FLITE_CLK_NAME);
1465 if (IS_ERR(fimc->clock))
1466 return PTR_ERR(fimc->clock);
1467
1468 return 0;
1469 }
1470
1471 static const struct of_device_id flite_of_match[];
1472
1473 static int fimc_lite_probe(struct platform_device *pdev)
1474 {
1475 struct flite_drvdata *drv_data = NULL;
1476 struct device *dev = &pdev->dev;
1477 const struct of_device_id *of_id;
1478 struct fimc_lite *fimc;
1479 struct resource *res;
1480 int ret;
1481
1482 if (!dev->of_node)
1483 return -ENODEV;
1484
1485 fimc = devm_kzalloc(dev, sizeof(*fimc), GFP_KERNEL);
1486 if (!fimc)
1487 return -ENOMEM;
1488
1489 of_id = of_match_node(flite_of_match, dev->of_node);
1490 if (of_id)
1491 drv_data = (struct flite_drvdata *)of_id->data;
1492 fimc->index = of_alias_get_id(dev->of_node, "fimc-lite");
1493
1494 if (!drv_data || fimc->index >= drv_data->num_instances ||
1495 fimc->index < 0) {
1496 dev_err(dev, "Wrong %s node alias\n",
1497 dev->of_node->full_name);
1498 return -EINVAL;
1499 }
1500
1501 fimc->dd = drv_data;
1502 fimc->pdev = pdev;
1503
1504 init_waitqueue_head(&fimc->irq_queue);
1505 spin_lock_init(&fimc->slock);
1506 mutex_init(&fimc->lock);
1507
1508 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1509 fimc->regs = devm_ioremap_resource(dev, res);
1510 if (IS_ERR(fimc->regs))
1511 return PTR_ERR(fimc->regs);
1512
1513 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1514 if (res == NULL) {
1515 dev_err(dev, "Failed to get IRQ resource\n");
1516 return -ENXIO;
1517 }
1518
1519 ret = fimc_lite_clk_get(fimc);
1520 if (ret)
1521 return ret;
1522
1523 ret = devm_request_irq(dev, res->start, flite_irq_handler,
1524 0, dev_name(dev), fimc);
1525 if (ret) {
1526 dev_err(dev, "Failed to install irq (%d)\n", ret);
1527 goto err_clk_put;
1528 }
1529
1530 /* The video node will be created within the subdev's registered() op */
1531 ret = fimc_lite_create_capture_subdev(fimc);
1532 if (ret)
1533 goto err_clk_put;
1534
1535 platform_set_drvdata(pdev, fimc);
1536 pm_runtime_enable(dev);
1537
1538 if (!pm_runtime_enabled(dev)) {
1539 ret = clk_prepare_enable(fimc->clock);
1540 if (ret < 0)
1541 goto err_sd;
1542 }
1543
1544 vb2_dma_contig_set_max_seg_size(dev, DMA_BIT_MASK(32));
1545
1546 fimc_lite_set_default_config(fimc);
1547
1548 dev_dbg(dev, "FIMC-LITE.%d registered successfully\n",
1549 fimc->index);
1550 return 0;
1551
1552 err_sd:
1553 fimc_lite_unregister_capture_subdev(fimc);
1554 err_clk_put:
1555 fimc_lite_clk_put(fimc);
1556 return ret;
1557 }
1558
1559 #ifdef CONFIG_PM
1560 static int fimc_lite_runtime_resume(struct device *dev)
1561 {
1562 struct fimc_lite *fimc = dev_get_drvdata(dev);
1563
1564 clk_prepare_enable(fimc->clock);
1565 return 0;
1566 }
1567
1568 static int fimc_lite_runtime_suspend(struct device *dev)
1569 {
1570 struct fimc_lite *fimc = dev_get_drvdata(dev);
1571
1572 clk_disable_unprepare(fimc->clock);
1573 return 0;
1574 }
1575 #endif
1576
1577 #ifdef CONFIG_PM_SLEEP
1578 static int fimc_lite_resume(struct device *dev)
1579 {
1580 struct fimc_lite *fimc = dev_get_drvdata(dev);
1581 struct flite_buffer *buf;
1582 unsigned long flags;
1583 int i;
1584
1585 spin_lock_irqsave(&fimc->slock, flags);
1586 if (!test_and_clear_bit(ST_LPM, &fimc->state) ||
1587 !test_bit(ST_FLITE_IN_USE, &fimc->state)) {
1588 spin_unlock_irqrestore(&fimc->slock, flags);
1589 return 0;
1590 }
1591 flite_hw_reset(fimc);
1592 spin_unlock_irqrestore(&fimc->slock, flags);
1593
1594 if (!test_and_clear_bit(ST_FLITE_SUSPENDED, &fimc->state))
1595 return 0;
1596
1597 INIT_LIST_HEAD(&fimc->active_buf_q);
1598 fimc_pipeline_call(&fimc->ve, open,
1599 &fimc->ve.vdev.entity, false);
1600 fimc_lite_hw_init(fimc, atomic_read(&fimc->out_path) == FIMC_IO_ISP);
1601 clear_bit(ST_FLITE_SUSPENDED, &fimc->state);
1602
1603 for (i = 0; i < fimc->reqbufs_count; i++) {
1604 if (list_empty(&fimc->pending_buf_q))
1605 break;
1606 buf = fimc_lite_pending_queue_pop(fimc);
1607 buffer_queue(&buf->vb.vb2_buf);
1608 }
1609 return 0;
1610 }
1611
1612 static int fimc_lite_suspend(struct device *dev)
1613 {
1614 struct fimc_lite *fimc = dev_get_drvdata(dev);
1615 bool suspend = test_bit(ST_FLITE_IN_USE, &fimc->state);
1616 int ret;
1617
1618 if (test_and_set_bit(ST_LPM, &fimc->state))
1619 return 0;
1620
1621 ret = fimc_lite_stop_capture(fimc, suspend);
1622 if (ret < 0 || !fimc_lite_active(fimc))
1623 return ret;
1624
1625 return fimc_pipeline_call(&fimc->ve, close);
1626 }
1627 #endif /* CONFIG_PM_SLEEP */
1628
1629 static int fimc_lite_remove(struct platform_device *pdev)
1630 {
1631 struct fimc_lite *fimc = platform_get_drvdata(pdev);
1632 struct device *dev = &pdev->dev;
1633
1634 pm_runtime_disable(dev);
1635 pm_runtime_set_suspended(dev);
1636 fimc_lite_unregister_capture_subdev(fimc);
1637 vb2_dma_contig_clear_max_seg_size(dev);
1638 fimc_lite_clk_put(fimc);
1639
1640 dev_info(dev, "Driver unloaded\n");
1641 return 0;
1642 }
1643
1644 static const struct dev_pm_ops fimc_lite_pm_ops = {
1645 SET_SYSTEM_SLEEP_PM_OPS(fimc_lite_suspend, fimc_lite_resume)
1646 SET_RUNTIME_PM_OPS(fimc_lite_runtime_suspend, fimc_lite_runtime_resume,
1647 NULL)
1648 };
1649
1650 /* EXYNOS4212, EXYNOS4412 */
1651 static struct flite_drvdata fimc_lite_drvdata_exynos4 = {
1652 .max_width = 8192,
1653 .max_height = 8192,
1654 .out_width_align = 8,
1655 .win_hor_offs_align = 2,
1656 .out_hor_offs_align = 8,
1657 .max_dma_bufs = 1,
1658 .num_instances = 2,
1659 };
1660
1661 /* EXYNOS5250 */
1662 static struct flite_drvdata fimc_lite_drvdata_exynos5 = {
1663 .max_width = 8192,
1664 .max_height = 8192,
1665 .out_width_align = 8,
1666 .win_hor_offs_align = 2,
1667 .out_hor_offs_align = 8,
1668 .max_dma_bufs = 32,
1669 .num_instances = 3,
1670 };
1671
1672 static const struct of_device_id flite_of_match[] = {
1673 {
1674 .compatible = "samsung,exynos4212-fimc-lite",
1675 .data = &fimc_lite_drvdata_exynos4,
1676 },
1677 {
1678 .compatible = "samsung,exynos5250-fimc-lite",
1679 .data = &fimc_lite_drvdata_exynos5,
1680 },
1681 { /* sentinel */ },
1682 };
1683 MODULE_DEVICE_TABLE(of, flite_of_match);
1684
1685 static struct platform_driver fimc_lite_driver = {
1686 .probe = fimc_lite_probe,
1687 .remove = fimc_lite_remove,
1688 .driver = {
1689 .of_match_table = flite_of_match,
1690 .name = FIMC_LITE_DRV_NAME,
1691 .pm = &fimc_lite_pm_ops,
1692 }
1693 };
1694 module_platform_driver(fimc_lite_driver);
1695 MODULE_LICENSE("GPL");
1696 MODULE_ALIAS("platform:" FIMC_LITE_DRV_NAME);
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