1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Samsung EXYNOS FIMC-LITE (camera host interface) driver
4 *
5  * Copyright (C) 2012 - 2013 Samsung Electronics Co., Ltd.
6  * Author: Sylwester Nawrocki <s.nawrocki@samsung.com>
7  */
8 #define pr_fmt(fmt) "%s:%d " fmt, __func__, __LINE__
9 
10 #include <linux/bug.h>
11 #include <linux/clk.h>
12 #include <linux/device.h>
13 #include <linux/errno.h>
14 #include <linux/interrupt.h>
15 #include <linux/kernel.h>
16 #include <linux/list.h>
17 #include <linux/module.h>
18 #include <linux/of.h>
19 #include <linux/types.h>
20 #include <linux/platform_device.h>
21 #include <linux/pm_runtime.h>
22 #include <linux/slab.h>
23 #include <linux/videodev2.h>
24 
25 #include <media/v4l2-device.h>
26 #include <media/v4l2-ioctl.h>
27 #include <media/v4l2-mem2mem.h>
28 #include <media/v4l2-rect.h>
29 #include <media/videobuf2-v4l2.h>
30 #include <media/videobuf2-dma-contig.h>
31 #include <media/drv-intf/exynos-fimc.h>
32 
33 #include "common.h"
34 #include "fimc-core.h"
35 #include "fimc-lite.h"
36 #include "fimc-lite-reg.h"
37 
38 static int debug;
39 module_param(debug, int, 0644);
40 
41 static const struct fimc_fmt fimc_lite_formats[] = {
42 	{
43 		.fourcc		= V4L2_PIX_FMT_YUYV,
44 		.colorspace	= V4L2_COLORSPACE_JPEG,
45 		.depth		= { 16 },
46 		.color		= FIMC_FMT_YCBYCR422,
47 		.memplanes	= 1,
48 		.mbus_code	= MEDIA_BUS_FMT_YUYV8_2X8,
49 		.flags		= FMT_FLAGS_YUV,
50 	}, {
51 		.fourcc		= V4L2_PIX_FMT_UYVY,
52 		.colorspace	= V4L2_COLORSPACE_JPEG,
53 		.depth		= { 16 },
54 		.color		= FIMC_FMT_CBYCRY422,
55 		.memplanes	= 1,
56 		.mbus_code	= MEDIA_BUS_FMT_UYVY8_2X8,
57 		.flags		= FMT_FLAGS_YUV,
58 	}, {
59 		.fourcc		= V4L2_PIX_FMT_VYUY,
60 		.colorspace	= V4L2_COLORSPACE_JPEG,
61 		.depth		= { 16 },
62 		.color		= FIMC_FMT_CRYCBY422,
63 		.memplanes	= 1,
64 		.mbus_code	= MEDIA_BUS_FMT_VYUY8_2X8,
65 		.flags		= FMT_FLAGS_YUV,
66 	}, {
67 		.fourcc		= V4L2_PIX_FMT_YVYU,
68 		.colorspace	= V4L2_COLORSPACE_JPEG,
69 		.depth		= { 16 },
70 		.color		= FIMC_FMT_YCRYCB422,
71 		.memplanes	= 1,
72 		.mbus_code	= MEDIA_BUS_FMT_YVYU8_2X8,
73 		.flags		= FMT_FLAGS_YUV,
74 	}, {
75 		.fourcc		= V4L2_PIX_FMT_SGRBG8,
76 		.colorspace	= V4L2_COLORSPACE_SRGB,
77 		.depth		= { 8 },
78 		.color		= FIMC_FMT_RAW8,
79 		.memplanes	= 1,
80 		.mbus_code	= MEDIA_BUS_FMT_SGRBG8_1X8,
81 		.flags		= FMT_FLAGS_RAW_BAYER,
82 	}, {
83 		.fourcc		= V4L2_PIX_FMT_SGRBG10,
84 		.colorspace	= V4L2_COLORSPACE_SRGB,
85 		.depth		= { 16 },
86 		.color		= FIMC_FMT_RAW10,
87 		.memplanes	= 1,
88 		.mbus_code	= MEDIA_BUS_FMT_SGRBG10_1X10,
89 		.flags		= FMT_FLAGS_RAW_BAYER,
90 	}, {
91 		.fourcc		= V4L2_PIX_FMT_SGRBG12,
92 		.colorspace	= V4L2_COLORSPACE_SRGB,
93 		.depth		= { 16 },
94 		.color		= FIMC_FMT_RAW12,
95 		.memplanes	= 1,
96 		.mbus_code	= MEDIA_BUS_FMT_SGRBG12_1X12,
97 		.flags		= FMT_FLAGS_RAW_BAYER,
98 	},
99 };
100 
101 /**
102  * fimc_lite_find_format - lookup fimc color format by fourcc or media bus code
103  * @pixelformat: fourcc to match, ignored if null
104  * @mbus_code: media bus code to match, ignored if null
105  * @mask: the color format flags to match
106  * @index: index to the fimc_lite_formats array, ignored if negative
107  */
108 static const struct fimc_fmt *fimc_lite_find_format(const u32 *pixelformat,
109 			const u32 *mbus_code, unsigned int mask, int index)
110 {
111 	const struct fimc_fmt *fmt, *def_fmt = NULL;
112 	unsigned int i;
113 	int id = 0;
114 
115 	if (index >= (int)ARRAY_SIZE(fimc_lite_formats))
116 		return NULL;
117 
118 	for (i = 0; i < ARRAY_SIZE(fimc_lite_formats); ++i) {
119 		fmt = &fimc_lite_formats[i];
120 		if (mask && !(fmt->flags & mask))
121 			continue;
122 		if (pixelformat && fmt->fourcc == *pixelformat)
123 			return fmt;
124 		if (mbus_code && fmt->mbus_code == *mbus_code)
125 			return fmt;
126 		if (index == id)
127 			def_fmt = fmt;
128 		id++;
129 	}
130 	return def_fmt;
131 }
132 
133 static int fimc_lite_hw_init(struct fimc_lite *fimc, bool isp_output)
134 {
135 	struct fimc_source_info *si;
136 	unsigned long flags;
137 
138 	if (fimc->sensor == NULL)
139 		return -ENXIO;
140 
141 	if (fimc->inp_frame.fmt == NULL || fimc->out_frame.fmt == NULL)
142 		return -EINVAL;
143 
144 	/* Get sensor configuration data from the sensor subdev */
145 	si = v4l2_get_subdev_hostdata(fimc->sensor);
146 	if (!si)
147 		return -EINVAL;
148 
149 	spin_lock_irqsave(&fimc->slock, flags);
150 
151 	flite_hw_set_camera_bus(fimc, si);
152 	flite_hw_set_source_format(fimc, &fimc->inp_frame);
153 	flite_hw_set_window_offset(fimc, &fimc->inp_frame);
154 	flite_hw_set_dma_buf_mask(fimc, 0);
155 	flite_hw_set_output_dma(fimc, &fimc->out_frame, !isp_output);
156 	flite_hw_set_interrupt_mask(fimc);
157 	flite_hw_set_test_pattern(fimc, fimc->test_pattern->val);
158 
159 	if (debug > 0)
160 		flite_hw_dump_regs(fimc, __func__);
161 
162 	spin_unlock_irqrestore(&fimc->slock, flags);
163 	return 0;
164 }
165 
166 /*
167  * Reinitialize the driver so it is ready to start the streaming again.
168  * Set fimc->state to indicate stream off and the hardware shut down state.
169  * If not suspending (@suspend is false), return any buffers to videobuf2.
170  * Otherwise put any owned buffers onto the pending buffers queue, so they
171  * can be re-spun when the device is being resumed. Also perform FIMC
172  * software reset and disable streaming on the whole pipeline if required.
173  */
174 static int fimc_lite_reinit(struct fimc_lite *fimc, bool suspend)
175 {
176 	struct flite_buffer *buf;
177 	unsigned long flags;
178 	bool streaming;
179 
180 	spin_lock_irqsave(&fimc->slock, flags);
181 	streaming = fimc->state & (1 << ST_SENSOR_STREAM);
182 
183 	fimc->state &= ~(1 << ST_FLITE_RUN | 1 << ST_FLITE_OFF |
184 			 1 << ST_FLITE_STREAM | 1 << ST_SENSOR_STREAM);
185 	if (suspend)
186 		fimc->state |= (1 << ST_FLITE_SUSPENDED);
187 	else
188 		fimc->state &= ~(1 << ST_FLITE_PENDING |
189 				 1 << ST_FLITE_SUSPENDED);
190 
191 	/* Release unused buffers */
192 	while (!suspend && !list_empty(&fimc->pending_buf_q)) {
193 		buf = fimc_lite_pending_queue_pop(fimc);
194 		vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
195 	}
196 	/* If suspending put unused buffers onto pending queue */
197 	while (!list_empty(&fimc->active_buf_q)) {
198 		buf = fimc_lite_active_queue_pop(fimc);
199 		if (suspend)
200 			fimc_lite_pending_queue_add(fimc, buf);
201 		else
202 			vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
203 	}
204 
205 	spin_unlock_irqrestore(&fimc->slock, flags);
206 
207 	flite_hw_reset(fimc);
208 
209 	if (!streaming)
210 		return 0;
211 
212 	return fimc_pipeline_call(&fimc->ve, set_stream, 0);
213 }
214 
215 static int fimc_lite_stop_capture(struct fimc_lite *fimc, bool suspend)
216 {
217 	unsigned long flags;
218 
219 	if (!fimc_lite_active(fimc))
220 		return 0;
221 
222 	spin_lock_irqsave(&fimc->slock, flags);
223 	set_bit(ST_FLITE_OFF, &fimc->state);
224 	flite_hw_capture_stop(fimc);
225 	spin_unlock_irqrestore(&fimc->slock, flags);
226 
227 	wait_event_timeout(fimc->irq_queue,
228 			   !test_bit(ST_FLITE_OFF, &fimc->state),
229 			   (2*HZ/10)); /* 200 ms */
230 
231 	return fimc_lite_reinit(fimc, suspend);
232 }
233 
234 /* Must be called  with fimc.slock spinlock held. */
235 static void fimc_lite_config_update(struct fimc_lite *fimc)
236 {
237 	flite_hw_set_window_offset(fimc, &fimc->inp_frame);
238 	flite_hw_set_dma_window(fimc, &fimc->out_frame);
239 	flite_hw_set_test_pattern(fimc, fimc->test_pattern->val);
240 	clear_bit(ST_FLITE_CONFIG, &fimc->state);
241 }
242 
243 static irqreturn_t flite_irq_handler(int irq, void *priv)
244 {
245 	struct fimc_lite *fimc = priv;
246 	struct flite_buffer *vbuf;
247 	unsigned long flags;
248 	u32 intsrc;
249 
250 	spin_lock_irqsave(&fimc->slock, flags);
251 
252 	intsrc = flite_hw_get_interrupt_source(fimc);
253 	flite_hw_clear_pending_irq(fimc);
254 
255 	if (test_and_clear_bit(ST_FLITE_OFF, &fimc->state)) {
256 		wake_up(&fimc->irq_queue);
257 		goto done;
258 	}
259 
260 	if (intsrc & FLITE_REG_CISTATUS_IRQ_SRC_OVERFLOW) {
261 		clear_bit(ST_FLITE_RUN, &fimc->state);
262 		fimc->events.data_overflow++;
263 	}
264 
265 	if (intsrc & FLITE_REG_CISTATUS_IRQ_SRC_LASTCAPEND) {
266 		flite_hw_clear_last_capture_end(fimc);
267 		clear_bit(ST_FLITE_STREAM, &fimc->state);
268 		wake_up(&fimc->irq_queue);
269 	}
270 
271 	if (atomic_read(&fimc->out_path) != FIMC_IO_DMA)
272 		goto done;
273 
274 	if ((intsrc & FLITE_REG_CISTATUS_IRQ_SRC_FRMSTART) &&
275 	    test_bit(ST_FLITE_RUN, &fimc->state) &&
276 	    !list_empty(&fimc->pending_buf_q)) {
277 		vbuf = fimc_lite_pending_queue_pop(fimc);
278 		flite_hw_set_dma_buffer(fimc, vbuf);
279 		fimc_lite_active_queue_add(fimc, vbuf);
280 	}
281 
282 	if ((intsrc & FLITE_REG_CISTATUS_IRQ_SRC_FRMEND) &&
283 	    test_bit(ST_FLITE_RUN, &fimc->state) &&
284 	    !list_empty(&fimc->active_buf_q)) {
285 		vbuf = fimc_lite_active_queue_pop(fimc);
286 		vbuf->vb.vb2_buf.timestamp = ktime_get_ns();
287 		vbuf->vb.sequence = fimc->frame_count++;
288 		flite_hw_mask_dma_buffer(fimc, vbuf->index);
289 		vb2_buffer_done(&vbuf->vb.vb2_buf, VB2_BUF_STATE_DONE);
290 	}
291 
292 	if (test_bit(ST_FLITE_CONFIG, &fimc->state))
293 		fimc_lite_config_update(fimc);
294 
295 	if (list_empty(&fimc->pending_buf_q)) {
296 		flite_hw_capture_stop(fimc);
297 		clear_bit(ST_FLITE_STREAM, &fimc->state);
298 	}
299 done:
300 	set_bit(ST_FLITE_RUN, &fimc->state);
301 	spin_unlock_irqrestore(&fimc->slock, flags);
302 	return IRQ_HANDLED;
303 }
304 
305 static int start_streaming(struct vb2_queue *q, unsigned int count)
306 {
307 	struct fimc_lite *fimc = q->drv_priv;
308 	unsigned long flags;
309 	int ret;
310 
311 	spin_lock_irqsave(&fimc->slock, flags);
312 
313 	fimc->buf_index = 0;
314 	fimc->frame_count = 0;
315 
316 	spin_unlock_irqrestore(&fimc->slock, flags);
317 
318 	ret = fimc_lite_hw_init(fimc, false);
319 	if (ret) {
320 		fimc_lite_reinit(fimc, false);
321 		return ret;
322 	}
323 
324 	set_bit(ST_FLITE_PENDING, &fimc->state);
325 
326 	if (!list_empty(&fimc->active_buf_q) &&
327 	    !test_and_set_bit(ST_FLITE_STREAM, &fimc->state)) {
328 		flite_hw_capture_start(fimc);
329 
330 		if (!test_and_set_bit(ST_SENSOR_STREAM, &fimc->state))
331 			fimc_pipeline_call(&fimc->ve, set_stream, 1);
332 	}
333 	if (debug > 0)
334 		flite_hw_dump_regs(fimc, __func__);
335 
336 	return 0;
337 }
338 
339 static void stop_streaming(struct vb2_queue *q)
340 {
341 	struct fimc_lite *fimc = q->drv_priv;
342 
343 	if (!fimc_lite_active(fimc))
344 		return;
345 
346 	fimc_lite_stop_capture(fimc, false);
347 }
348 
349 static int queue_setup(struct vb2_queue *vq,
350 		       unsigned int *num_buffers, unsigned int *num_planes,
351 		       unsigned int sizes[], struct device *alloc_devs[])
352 {
353 	struct fimc_lite *fimc = vq->drv_priv;
354 	struct flite_frame *frame = &fimc->out_frame;
355 	const struct fimc_fmt *fmt = frame->fmt;
356 	unsigned long wh = frame->f_width * frame->f_height;
357 	int i;
358 
359 	if (fmt == NULL)
360 		return -EINVAL;
361 
362 	if (*num_planes) {
363 		if (*num_planes != fmt->memplanes)
364 			return -EINVAL;
365 		for (i = 0; i < *num_planes; i++)
366 			if (sizes[i] < (wh * fmt->depth[i]) / 8)
367 				return -EINVAL;
368 		return 0;
369 	}
370 
371 	*num_planes = fmt->memplanes;
372 
373 	for (i = 0; i < fmt->memplanes; i++)
374 		sizes[i] = (wh * fmt->depth[i]) / 8;
375 
376 	return 0;
377 }
378 
379 static int buffer_prepare(struct vb2_buffer *vb)
380 {
381 	struct vb2_queue *vq = vb->vb2_queue;
382 	struct fimc_lite *fimc = vq->drv_priv;
383 	int i;
384 
385 	if (fimc->out_frame.fmt == NULL)
386 		return -EINVAL;
387 
388 	for (i = 0; i < fimc->out_frame.fmt->memplanes; i++) {
389 		unsigned long size = fimc->payload[i];
390 
391 		if (vb2_plane_size(vb, i) < size) {
392 			v4l2_err(&fimc->ve.vdev,
393 				 "User buffer too small (%ld < %ld)\n",
394 				 vb2_plane_size(vb, i), size);
395 			return -EINVAL;
396 		}
397 		vb2_set_plane_payload(vb, i, size);
398 	}
399 
400 	return 0;
401 }
402 
403 static void buffer_queue(struct vb2_buffer *vb)
404 {
405 	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
406 	struct flite_buffer *buf
407 		= container_of(vbuf, struct flite_buffer, vb);
408 	struct fimc_lite *fimc = vb2_get_drv_priv(vb->vb2_queue);
409 	unsigned long flags;
410 
411 	spin_lock_irqsave(&fimc->slock, flags);
412 	buf->addr = vb2_dma_contig_plane_dma_addr(vb, 0);
413 
414 	buf->index = fimc->buf_index++;
415 	if (fimc->buf_index >= fimc->reqbufs_count)
416 		fimc->buf_index = 0;
417 
418 	if (!test_bit(ST_FLITE_SUSPENDED, &fimc->state) &&
419 	    !test_bit(ST_FLITE_STREAM, &fimc->state) &&
420 	    list_empty(&fimc->active_buf_q)) {
421 		flite_hw_set_dma_buffer(fimc, buf);
422 		fimc_lite_active_queue_add(fimc, buf);
423 	} else {
424 		fimc_lite_pending_queue_add(fimc, buf);
425 	}
426 
427 	if (vb2_is_streaming(&fimc->vb_queue) &&
428 	    !list_empty(&fimc->pending_buf_q) &&
429 	    !test_and_set_bit(ST_FLITE_STREAM, &fimc->state)) {
430 		flite_hw_capture_start(fimc);
431 		spin_unlock_irqrestore(&fimc->slock, flags);
432 
433 		if (!test_and_set_bit(ST_SENSOR_STREAM, &fimc->state))
434 			fimc_pipeline_call(&fimc->ve, set_stream, 1);
435 		return;
436 	}
437 	spin_unlock_irqrestore(&fimc->slock, flags);
438 }
439 
440 static const struct vb2_ops fimc_lite_qops = {
441 	.queue_setup	 = queue_setup,
442 	.buf_prepare	 = buffer_prepare,
443 	.buf_queue	 = buffer_queue,
444 	.wait_prepare	 = vb2_ops_wait_prepare,
445 	.wait_finish	 = vb2_ops_wait_finish,
446 	.start_streaming = start_streaming,
447 	.stop_streaming	 = stop_streaming,
448 };
449 
450 static void fimc_lite_clear_event_counters(struct fimc_lite *fimc)
451 {
452 	unsigned long flags;
453 
454 	spin_lock_irqsave(&fimc->slock, flags);
455 	memset(&fimc->events, 0, sizeof(fimc->events));
456 	spin_unlock_irqrestore(&fimc->slock, flags);
457 }
458 
459 static int fimc_lite_open(struct file *file)
460 {
461 	struct fimc_lite *fimc = video_drvdata(file);
462 	struct media_entity *me = &fimc->ve.vdev.entity;
463 	int ret;
464 
465 	mutex_lock(&fimc->lock);
466 	if (atomic_read(&fimc->out_path) != FIMC_IO_DMA) {
467 		ret = -EBUSY;
468 		goto unlock;
469 	}
470 
471 	set_bit(ST_FLITE_IN_USE, &fimc->state);
472 	ret = pm_runtime_resume_and_get(&fimc->pdev->dev);
473 	if (ret < 0)
474 		goto err_in_use;
475 
476 	ret = v4l2_fh_open(file);
477 	if (ret < 0)
478 		goto err_pm;
479 
480 	if (!v4l2_fh_is_singular_file(file) ||
481 	    atomic_read(&fimc->out_path) != FIMC_IO_DMA)
482 		goto unlock;
483 
484 	mutex_lock(&me->graph_obj.mdev->graph_mutex);
485 
486 	ret = fimc_pipeline_call(&fimc->ve, open, me, true);
487 
488 	/* Mark video pipeline ending at this video node as in use. */
489 	if (ret == 0)
490 		me->use_count++;
491 
492 	mutex_unlock(&me->graph_obj.mdev->graph_mutex);
493 
494 	if (!ret) {
495 		fimc_lite_clear_event_counters(fimc);
496 		goto unlock;
497 	}
498 
499 	v4l2_fh_release(file);
500 err_pm:
501 	pm_runtime_put_sync(&fimc->pdev->dev);
502 err_in_use:
503 	clear_bit(ST_FLITE_IN_USE, &fimc->state);
504 unlock:
505 	mutex_unlock(&fimc->lock);
506 	return ret;
507 }
508 
509 static int fimc_lite_release(struct file *file)
510 {
511 	struct fimc_lite *fimc = video_drvdata(file);
512 	struct media_entity *entity = &fimc->ve.vdev.entity;
513 
514 	mutex_lock(&fimc->lock);
515 
516 	if (v4l2_fh_is_singular_file(file) &&
517 	    atomic_read(&fimc->out_path) == FIMC_IO_DMA) {
518 		if (fimc->streaming) {
519 			media_pipeline_stop(entity);
520 			fimc->streaming = false;
521 		}
522 		fimc_lite_stop_capture(fimc, false);
523 		fimc_pipeline_call(&fimc->ve, close);
524 		clear_bit(ST_FLITE_IN_USE, &fimc->state);
525 
526 		mutex_lock(&entity->graph_obj.mdev->graph_mutex);
527 		entity->use_count--;
528 		mutex_unlock(&entity->graph_obj.mdev->graph_mutex);
529 	}
530 
531 	_vb2_fop_release(file, NULL);
532 	pm_runtime_put(&fimc->pdev->dev);
533 	clear_bit(ST_FLITE_SUSPENDED, &fimc->state);
534 
535 	mutex_unlock(&fimc->lock);
536 	return 0;
537 }
538 
539 static const struct v4l2_file_operations fimc_lite_fops = {
540 	.owner		= THIS_MODULE,
541 	.open		= fimc_lite_open,
542 	.release	= fimc_lite_release,
543 	.poll		= vb2_fop_poll,
544 	.unlocked_ioctl	= video_ioctl2,
545 	.mmap		= vb2_fop_mmap,
546 };
547 
548 /*
549  * Format and crop negotiation helpers
550  */
551 
552 static const struct fimc_fmt *fimc_lite_subdev_try_fmt(struct fimc_lite *fimc,
553 					struct v4l2_subdev_state *sd_state,
554 					struct v4l2_subdev_format *format)
555 {
556 	struct flite_drvdata *dd = fimc->dd;
557 	struct v4l2_mbus_framefmt *mf = &format->format;
558 	const struct fimc_fmt *fmt = NULL;
559 
560 	if (format->pad == FLITE_SD_PAD_SINK) {
561 		v4l_bound_align_image(&mf->width, 8, dd->max_width,
562 				ffs(dd->out_width_align) - 1,
563 				&mf->height, 0, dd->max_height, 0, 0);
564 
565 		fmt = fimc_lite_find_format(NULL, &mf->code, 0, 0);
566 		if (WARN_ON(!fmt))
567 			return NULL;
568 
569 		mf->colorspace = fmt->colorspace;
570 		mf->code = fmt->mbus_code;
571 	} else {
572 		struct flite_frame *sink = &fimc->inp_frame;
573 		struct v4l2_mbus_framefmt *sink_fmt;
574 		struct v4l2_rect *rect;
575 
576 		if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
577 			sink_fmt = v4l2_subdev_get_try_format(&fimc->subdev,
578 							      sd_state,
579 							      FLITE_SD_PAD_SINK);
580 
581 			mf->code = sink_fmt->code;
582 			mf->colorspace = sink_fmt->colorspace;
583 
584 			rect = v4l2_subdev_get_try_crop(&fimc->subdev,
585 							sd_state,
586 							FLITE_SD_PAD_SINK);
587 		} else {
588 			mf->code = sink->fmt->mbus_code;
589 			mf->colorspace = sink->fmt->colorspace;
590 			rect = &sink->rect;
591 		}
592 
593 		/* Allow changing format only on sink pad */
594 		mf->width = rect->width;
595 		mf->height = rect->height;
596 	}
597 
598 	mf->field = V4L2_FIELD_NONE;
599 
600 	v4l2_dbg(1, debug, &fimc->subdev, "code: %#x (%d), %dx%d\n",
601 		 mf->code, mf->colorspace, mf->width, mf->height);
602 
603 	return fmt;
604 }
605 
606 static void fimc_lite_try_crop(struct fimc_lite *fimc, struct v4l2_rect *r)
607 {
608 	struct flite_frame *frame = &fimc->inp_frame;
609 
610 	v4l_bound_align_image(&r->width, 0, frame->f_width, 0,
611 			      &r->height, 0, frame->f_height, 0, 0);
612 
613 	/* Adjust left/top if cropping rectangle got out of bounds */
614 	r->left = clamp_t(u32, r->left, 0, frame->f_width - r->width);
615 	r->left = round_down(r->left, fimc->dd->win_hor_offs_align);
616 	r->top  = clamp_t(u32, r->top, 0, frame->f_height - r->height);
617 
618 	v4l2_dbg(1, debug, &fimc->subdev, "(%d,%d)/%dx%d, sink fmt: %dx%d\n",
619 		 r->left, r->top, r->width, r->height,
620 		 frame->f_width, frame->f_height);
621 }
622 
623 static void fimc_lite_try_compose(struct fimc_lite *fimc, struct v4l2_rect *r)
624 {
625 	struct flite_frame *frame = &fimc->out_frame;
626 	struct v4l2_rect *crop_rect = &fimc->inp_frame.rect;
627 
628 	/* Scaling is not supported so we enforce compose rectangle size
629 	   same as size of the sink crop rectangle. */
630 	r->width = crop_rect->width;
631 	r->height = crop_rect->height;
632 
633 	/* Adjust left/top if the composing rectangle got out of bounds */
634 	r->left = clamp_t(u32, r->left, 0, frame->f_width - r->width);
635 	r->left = round_down(r->left, fimc->dd->out_hor_offs_align);
636 	r->top  = clamp_t(u32, r->top, 0, fimc->out_frame.f_height - r->height);
637 
638 	v4l2_dbg(1, debug, &fimc->subdev, "(%d,%d)/%dx%d, source fmt: %dx%d\n",
639 		 r->left, r->top, r->width, r->height,
640 		 frame->f_width, frame->f_height);
641 }
642 
643 /*
644  * Video node ioctl operations
645  */
646 static int fimc_lite_querycap(struct file *file, void *priv,
647 					struct v4l2_capability *cap)
648 {
649 	struct fimc_lite *fimc = video_drvdata(file);
650 
651 	strscpy(cap->driver, FIMC_LITE_DRV_NAME, sizeof(cap->driver));
652 	strscpy(cap->card, FIMC_LITE_DRV_NAME, sizeof(cap->card));
653 	snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
654 					dev_name(&fimc->pdev->dev));
655 	return 0;
656 }
657 
658 static int fimc_lite_enum_fmt(struct file *file, void *priv,
659 			      struct v4l2_fmtdesc *f)
660 {
661 	const struct fimc_fmt *fmt;
662 
663 	if (f->index >= ARRAY_SIZE(fimc_lite_formats))
664 		return -EINVAL;
665 
666 	fmt = &fimc_lite_formats[f->index];
667 	f->pixelformat = fmt->fourcc;
668 
669 	return 0;
670 }
671 
672 static int fimc_lite_g_fmt_mplane(struct file *file, void *fh,
673 				  struct v4l2_format *f)
674 {
675 	struct fimc_lite *fimc = video_drvdata(file);
676 	struct v4l2_pix_format_mplane *pixm = &f->fmt.pix_mp;
677 	struct v4l2_plane_pix_format *plane_fmt = &pixm->plane_fmt[0];
678 	struct flite_frame *frame = &fimc->out_frame;
679 	const struct fimc_fmt *fmt = frame->fmt;
680 
681 	plane_fmt->bytesperline = (frame->f_width * fmt->depth[0]) / 8;
682 	plane_fmt->sizeimage = plane_fmt->bytesperline * frame->f_height;
683 
684 	pixm->num_planes = fmt->memplanes;
685 	pixm->pixelformat = fmt->fourcc;
686 	pixm->width = frame->f_width;
687 	pixm->height = frame->f_height;
688 	pixm->field = V4L2_FIELD_NONE;
689 	pixm->colorspace = fmt->colorspace;
690 	return 0;
691 }
692 
693 static int fimc_lite_try_fmt(struct fimc_lite *fimc,
694 			     struct v4l2_pix_format_mplane *pixm,
695 			     const struct fimc_fmt **ffmt)
696 {
697 	u32 bpl = pixm->plane_fmt[0].bytesperline;
698 	struct flite_drvdata *dd = fimc->dd;
699 	const struct fimc_fmt *inp_fmt = fimc->inp_frame.fmt;
700 	const struct fimc_fmt *fmt;
701 
702 	if (WARN_ON(inp_fmt == NULL))
703 		return -EINVAL;
704 	/*
705 	 * We allow some flexibility only for YUV formats. In case of raw
706 	 * raw Bayer the FIMC-LITE's output format must match its camera
707 	 * interface input format.
708 	 */
709 	if (inp_fmt->flags & FMT_FLAGS_YUV)
710 		fmt = fimc_lite_find_format(&pixm->pixelformat, NULL,
711 						inp_fmt->flags, 0);
712 	else
713 		fmt = inp_fmt;
714 
715 	if (WARN_ON(fmt == NULL))
716 		return -EINVAL;
717 	if (ffmt)
718 		*ffmt = fmt;
719 	v4l_bound_align_image(&pixm->width, 8, dd->max_width,
720 			      ffs(dd->out_width_align) - 1,
721 			      &pixm->height, 0, dd->max_height, 0, 0);
722 
723 	if ((bpl == 0 || ((bpl * 8) / fmt->depth[0]) < pixm->width))
724 		pixm->plane_fmt[0].bytesperline = (pixm->width *
725 						   fmt->depth[0]) / 8;
726 
727 	if (pixm->plane_fmt[0].sizeimage == 0)
728 		pixm->plane_fmt[0].sizeimage = (pixm->width * pixm->height *
729 						fmt->depth[0]) / 8;
730 	pixm->num_planes = fmt->memplanes;
731 	pixm->pixelformat = fmt->fourcc;
732 	pixm->colorspace = fmt->colorspace;
733 	pixm->field = V4L2_FIELD_NONE;
734 	return 0;
735 }
736 
737 static int fimc_lite_try_fmt_mplane(struct file *file, void *fh,
738 				    struct v4l2_format *f)
739 {
740 	struct fimc_lite *fimc = video_drvdata(file);
741 	return fimc_lite_try_fmt(fimc, &f->fmt.pix_mp, NULL);
742 }
743 
744 static int fimc_lite_s_fmt_mplane(struct file *file, void *priv,
745 				  struct v4l2_format *f)
746 {
747 	struct v4l2_pix_format_mplane *pixm = &f->fmt.pix_mp;
748 	struct fimc_lite *fimc = video_drvdata(file);
749 	struct flite_frame *frame = &fimc->out_frame;
750 	const struct fimc_fmt *fmt = NULL;
751 	int ret;
752 
753 	if (vb2_is_busy(&fimc->vb_queue))
754 		return -EBUSY;
755 
756 	ret = fimc_lite_try_fmt(fimc, &f->fmt.pix_mp, &fmt);
757 	if (ret < 0)
758 		return ret;
759 
760 	frame->fmt = fmt;
761 	fimc->payload[0] = max((pixm->width * pixm->height * fmt->depth[0]) / 8,
762 			       pixm->plane_fmt[0].sizeimage);
763 	frame->f_width = pixm->width;
764 	frame->f_height = pixm->height;
765 
766 	return 0;
767 }
768 
769 static int fimc_pipeline_validate(struct fimc_lite *fimc)
770 {
771 	struct v4l2_subdev *sd = &fimc->subdev;
772 	struct v4l2_subdev_format sink_fmt, src_fmt;
773 	struct media_pad *pad;
774 	int ret;
775 
776 	while (1) {
777 		/* Retrieve format at the sink pad */
778 		pad = &sd->entity.pads[0];
779 		if (!(pad->flags & MEDIA_PAD_FL_SINK))
780 			break;
781 		/* Don't call FIMC subdev operation to avoid nested locking */
782 		if (sd == &fimc->subdev) {
783 			struct flite_frame *ff = &fimc->out_frame;
784 			sink_fmt.format.width = ff->f_width;
785 			sink_fmt.format.height = ff->f_height;
786 			sink_fmt.format.code = fimc->inp_frame.fmt->mbus_code;
787 		} else {
788 			sink_fmt.pad = pad->index;
789 			sink_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
790 			ret = v4l2_subdev_call(sd, pad, get_fmt, NULL,
791 					       &sink_fmt);
792 			if (ret < 0 && ret != -ENOIOCTLCMD)
793 				return -EPIPE;
794 		}
795 		/* Retrieve format at the source pad */
796 		pad = media_entity_remote_pad(pad);
797 		if (!pad || !is_media_entity_v4l2_subdev(pad->entity))
798 			break;
799 
800 		sd = media_entity_to_v4l2_subdev(pad->entity);
801 		src_fmt.pad = pad->index;
802 		src_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
803 		ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &src_fmt);
804 		if (ret < 0 && ret != -ENOIOCTLCMD)
805 			return -EPIPE;
806 
807 		if (src_fmt.format.width != sink_fmt.format.width ||
808 		    src_fmt.format.height != sink_fmt.format.height ||
809 		    src_fmt.format.code != sink_fmt.format.code)
810 			return -EPIPE;
811 	}
812 	return 0;
813 }
814 
815 static int fimc_lite_streamon(struct file *file, void *priv,
816 			      enum v4l2_buf_type type)
817 {
818 	struct fimc_lite *fimc = video_drvdata(file);
819 	struct media_entity *entity = &fimc->ve.vdev.entity;
820 	int ret;
821 
822 	if (fimc_lite_active(fimc))
823 		return -EBUSY;
824 
825 	ret = media_pipeline_start(entity, &fimc->ve.pipe->mp);
826 	if (ret < 0)
827 		return ret;
828 
829 	ret = fimc_pipeline_validate(fimc);
830 	if (ret < 0)
831 		goto err_p_stop;
832 
833 	fimc->sensor = fimc_find_remote_sensor(&fimc->subdev.entity);
834 
835 	ret = vb2_ioctl_streamon(file, priv, type);
836 	if (!ret) {
837 		fimc->streaming = true;
838 		return ret;
839 	}
840 
841 err_p_stop:
842 	media_pipeline_stop(entity);
843 	return 0;
844 }
845 
846 static int fimc_lite_streamoff(struct file *file, void *priv,
847 			       enum v4l2_buf_type type)
848 {
849 	struct fimc_lite *fimc = video_drvdata(file);
850 	int ret;
851 
852 	ret = vb2_ioctl_streamoff(file, priv, type);
853 	if (ret < 0)
854 		return ret;
855 
856 	media_pipeline_stop(&fimc->ve.vdev.entity);
857 	fimc->streaming = false;
858 	return 0;
859 }
860 
861 static int fimc_lite_reqbufs(struct file *file, void *priv,
862 			     struct v4l2_requestbuffers *reqbufs)
863 {
864 	struct fimc_lite *fimc = video_drvdata(file);
865 	int ret;
866 
867 	reqbufs->count = max_t(u32, FLITE_REQ_BUFS_MIN, reqbufs->count);
868 	ret = vb2_ioctl_reqbufs(file, priv, reqbufs);
869 	if (!ret)
870 		fimc->reqbufs_count = reqbufs->count;
871 
872 	return ret;
873 }
874 
875 static int fimc_lite_g_selection(struct file *file, void *fh,
876 				 struct v4l2_selection *sel)
877 {
878 	struct fimc_lite *fimc = video_drvdata(file);
879 	struct flite_frame *f = &fimc->out_frame;
880 
881 	if (sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
882 		return -EINVAL;
883 
884 	switch (sel->target) {
885 	case V4L2_SEL_TGT_COMPOSE_BOUNDS:
886 	case V4L2_SEL_TGT_COMPOSE_DEFAULT:
887 		sel->r.left = 0;
888 		sel->r.top = 0;
889 		sel->r.width = f->f_width;
890 		sel->r.height = f->f_height;
891 		return 0;
892 
893 	case V4L2_SEL_TGT_COMPOSE:
894 		sel->r = f->rect;
895 		return 0;
896 	}
897 
898 	return -EINVAL;
899 }
900 
901 static int fimc_lite_s_selection(struct file *file, void *fh,
902 				 struct v4l2_selection *sel)
903 {
904 	struct fimc_lite *fimc = video_drvdata(file);
905 	struct flite_frame *f = &fimc->out_frame;
906 	struct v4l2_rect rect = sel->r;
907 	unsigned long flags;
908 
909 	if (sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
910 	    sel->target != V4L2_SEL_TGT_COMPOSE)
911 		return -EINVAL;
912 
913 	fimc_lite_try_compose(fimc, &rect);
914 
915 	if ((sel->flags & V4L2_SEL_FLAG_LE) &&
916 	    !v4l2_rect_enclosed(&rect, &sel->r))
917 		return -ERANGE;
918 
919 	if ((sel->flags & V4L2_SEL_FLAG_GE) &&
920 	    !v4l2_rect_enclosed(&sel->r, &rect))
921 		return -ERANGE;
922 
923 	sel->r = rect;
924 	spin_lock_irqsave(&fimc->slock, flags);
925 	f->rect = rect;
926 	set_bit(ST_FLITE_CONFIG, &fimc->state);
927 	spin_unlock_irqrestore(&fimc->slock, flags);
928 
929 	return 0;
930 }
931 
932 static const struct v4l2_ioctl_ops fimc_lite_ioctl_ops = {
933 	.vidioc_querycap		= fimc_lite_querycap,
934 	.vidioc_enum_fmt_vid_cap	= fimc_lite_enum_fmt,
935 	.vidioc_try_fmt_vid_cap_mplane	= fimc_lite_try_fmt_mplane,
936 	.vidioc_s_fmt_vid_cap_mplane	= fimc_lite_s_fmt_mplane,
937 	.vidioc_g_fmt_vid_cap_mplane	= fimc_lite_g_fmt_mplane,
938 	.vidioc_g_selection		= fimc_lite_g_selection,
939 	.vidioc_s_selection		= fimc_lite_s_selection,
940 	.vidioc_reqbufs			= fimc_lite_reqbufs,
941 	.vidioc_querybuf		= vb2_ioctl_querybuf,
942 	.vidioc_prepare_buf		= vb2_ioctl_prepare_buf,
943 	.vidioc_create_bufs		= vb2_ioctl_create_bufs,
944 	.vidioc_qbuf			= vb2_ioctl_qbuf,
945 	.vidioc_dqbuf			= vb2_ioctl_dqbuf,
946 	.vidioc_streamon		= fimc_lite_streamon,
947 	.vidioc_streamoff		= fimc_lite_streamoff,
948 };
949 
950 /* Capture subdev media entity operations */
951 static int fimc_lite_link_setup(struct media_entity *entity,
952 				const struct media_pad *local,
953 				const struct media_pad *remote, u32 flags)
954 {
955 	struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity);
956 	struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
957 	int ret = 0;
958 
959 	if (WARN_ON(fimc == NULL))
960 		return 0;
961 
962 	v4l2_dbg(1, debug, sd, "%s: %s --> %s, flags: 0x%x. source_id: 0x%x\n",
963 		 __func__, remote->entity->name, local->entity->name,
964 		 flags, fimc->source_subdev_grp_id);
965 
966 	switch (local->index) {
967 	case FLITE_SD_PAD_SINK:
968 		if (flags & MEDIA_LNK_FL_ENABLED) {
969 			if (fimc->source_subdev_grp_id == 0)
970 				fimc->source_subdev_grp_id = sd->grp_id;
971 			else
972 				ret = -EBUSY;
973 		} else {
974 			fimc->source_subdev_grp_id = 0;
975 			fimc->sensor = NULL;
976 		}
977 		break;
978 
979 	case FLITE_SD_PAD_SOURCE_DMA:
980 		if (!(flags & MEDIA_LNK_FL_ENABLED))
981 			atomic_set(&fimc->out_path, FIMC_IO_NONE);
982 		else
983 			atomic_set(&fimc->out_path, FIMC_IO_DMA);
984 		break;
985 
986 	case FLITE_SD_PAD_SOURCE_ISP:
987 		if (!(flags & MEDIA_LNK_FL_ENABLED))
988 			atomic_set(&fimc->out_path, FIMC_IO_NONE);
989 		else
990 			atomic_set(&fimc->out_path, FIMC_IO_ISP);
991 		break;
992 
993 	default:
994 		v4l2_err(sd, "Invalid pad index\n");
995 		ret = -EINVAL;
996 	}
997 	mb();
998 
999 	return ret;
1000 }
1001 
1002 static const struct media_entity_operations fimc_lite_subdev_media_ops = {
1003 	.link_setup = fimc_lite_link_setup,
1004 };
1005 
1006 static int fimc_lite_subdev_enum_mbus_code(struct v4l2_subdev *sd,
1007 					   struct v4l2_subdev_state *sd_state,
1008 					   struct v4l2_subdev_mbus_code_enum *code)
1009 {
1010 	const struct fimc_fmt *fmt;
1011 
1012 	fmt = fimc_lite_find_format(NULL, NULL, 0, code->index);
1013 	if (!fmt)
1014 		return -EINVAL;
1015 	code->code = fmt->mbus_code;
1016 	return 0;
1017 }
1018 
1019 static struct v4l2_mbus_framefmt *__fimc_lite_subdev_get_try_fmt(
1020 		struct v4l2_subdev *sd,
1021 		struct v4l2_subdev_state *sd_state, unsigned int pad)
1022 {
1023 	if (pad != FLITE_SD_PAD_SINK)
1024 		pad = FLITE_SD_PAD_SOURCE_DMA;
1025 
1026 	return v4l2_subdev_get_try_format(sd, sd_state, pad);
1027 }
1028 
1029 static int fimc_lite_subdev_get_fmt(struct v4l2_subdev *sd,
1030 				    struct v4l2_subdev_state *sd_state,
1031 				    struct v4l2_subdev_format *fmt)
1032 {
1033 	struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1034 	struct v4l2_mbus_framefmt *mf = &fmt->format;
1035 	struct flite_frame *f = &fimc->inp_frame;
1036 
1037 	if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
1038 		mf = __fimc_lite_subdev_get_try_fmt(sd, sd_state, fmt->pad);
1039 		fmt->format = *mf;
1040 		return 0;
1041 	}
1042 
1043 	mutex_lock(&fimc->lock);
1044 	mf->colorspace = f->fmt->colorspace;
1045 	mf->code = f->fmt->mbus_code;
1046 
1047 	if (fmt->pad == FLITE_SD_PAD_SINK) {
1048 		/* full camera input frame size */
1049 		mf->width = f->f_width;
1050 		mf->height = f->f_height;
1051 	} else {
1052 		/* crop size */
1053 		mf->width = f->rect.width;
1054 		mf->height = f->rect.height;
1055 	}
1056 	mutex_unlock(&fimc->lock);
1057 	return 0;
1058 }
1059 
1060 static int fimc_lite_subdev_set_fmt(struct v4l2_subdev *sd,
1061 				    struct v4l2_subdev_state *sd_state,
1062 				    struct v4l2_subdev_format *fmt)
1063 {
1064 	struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1065 	struct v4l2_mbus_framefmt *mf = &fmt->format;
1066 	struct flite_frame *sink = &fimc->inp_frame;
1067 	struct flite_frame *source = &fimc->out_frame;
1068 	const struct fimc_fmt *ffmt;
1069 
1070 	v4l2_dbg(1, debug, sd, "pad%d: code: 0x%x, %dx%d\n",
1071 		 fmt->pad, mf->code, mf->width, mf->height);
1072 
1073 	mutex_lock(&fimc->lock);
1074 
1075 	if ((atomic_read(&fimc->out_path) == FIMC_IO_ISP &&
1076 	    media_entity_is_streaming(&sd->entity)) ||
1077 	    (atomic_read(&fimc->out_path) == FIMC_IO_DMA &&
1078 	    vb2_is_busy(&fimc->vb_queue))) {
1079 		mutex_unlock(&fimc->lock);
1080 		return -EBUSY;
1081 	}
1082 
1083 	ffmt = fimc_lite_subdev_try_fmt(fimc, sd_state, fmt);
1084 
1085 	if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
1086 		struct v4l2_mbus_framefmt *src_fmt;
1087 
1088 		mf = __fimc_lite_subdev_get_try_fmt(sd, sd_state, fmt->pad);
1089 		*mf = fmt->format;
1090 
1091 		if (fmt->pad == FLITE_SD_PAD_SINK) {
1092 			unsigned int pad = FLITE_SD_PAD_SOURCE_DMA;
1093 			src_fmt = __fimc_lite_subdev_get_try_fmt(sd, sd_state,
1094 								 pad);
1095 			*src_fmt = *mf;
1096 		}
1097 
1098 		mutex_unlock(&fimc->lock);
1099 		return 0;
1100 	}
1101 
1102 	if (fmt->pad == FLITE_SD_PAD_SINK) {
1103 		sink->f_width = mf->width;
1104 		sink->f_height = mf->height;
1105 		sink->fmt = ffmt;
1106 		/* Set sink crop rectangle */
1107 		sink->rect.width = mf->width;
1108 		sink->rect.height = mf->height;
1109 		sink->rect.left = 0;
1110 		sink->rect.top = 0;
1111 		/* Reset source format and crop rectangle */
1112 		source->rect = sink->rect;
1113 		source->f_width = mf->width;
1114 		source->f_height = mf->height;
1115 	}
1116 
1117 	mutex_unlock(&fimc->lock);
1118 	return 0;
1119 }
1120 
1121 static int fimc_lite_subdev_get_selection(struct v4l2_subdev *sd,
1122 					  struct v4l2_subdev_state *sd_state,
1123 					  struct v4l2_subdev_selection *sel)
1124 {
1125 	struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1126 	struct flite_frame *f = &fimc->inp_frame;
1127 
1128 	if ((sel->target != V4L2_SEL_TGT_CROP &&
1129 	     sel->target != V4L2_SEL_TGT_CROP_BOUNDS) ||
1130 	     sel->pad != FLITE_SD_PAD_SINK)
1131 		return -EINVAL;
1132 
1133 	if (sel->which == V4L2_SUBDEV_FORMAT_TRY) {
1134 		sel->r = *v4l2_subdev_get_try_crop(sd, sd_state, sel->pad);
1135 		return 0;
1136 	}
1137 
1138 	mutex_lock(&fimc->lock);
1139 	if (sel->target == V4L2_SEL_TGT_CROP) {
1140 		sel->r = f->rect;
1141 	} else {
1142 		sel->r.left = 0;
1143 		sel->r.top = 0;
1144 		sel->r.width = f->f_width;
1145 		sel->r.height = f->f_height;
1146 	}
1147 	mutex_unlock(&fimc->lock);
1148 
1149 	v4l2_dbg(1, debug, sd, "%s: (%d,%d) %dx%d, f_w: %d, f_h: %d\n",
1150 		 __func__, f->rect.left, f->rect.top, f->rect.width,
1151 		 f->rect.height, f->f_width, f->f_height);
1152 
1153 	return 0;
1154 }
1155 
1156 static int fimc_lite_subdev_set_selection(struct v4l2_subdev *sd,
1157 					  struct v4l2_subdev_state *sd_state,
1158 					  struct v4l2_subdev_selection *sel)
1159 {
1160 	struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1161 	struct flite_frame *f = &fimc->inp_frame;
1162 	int ret = 0;
1163 
1164 	if (sel->target != V4L2_SEL_TGT_CROP || sel->pad != FLITE_SD_PAD_SINK)
1165 		return -EINVAL;
1166 
1167 	mutex_lock(&fimc->lock);
1168 	fimc_lite_try_crop(fimc, &sel->r);
1169 
1170 	if (sel->which == V4L2_SUBDEV_FORMAT_TRY) {
1171 		*v4l2_subdev_get_try_crop(sd, sd_state, sel->pad) = sel->r;
1172 	} else {
1173 		unsigned long flags;
1174 		spin_lock_irqsave(&fimc->slock, flags);
1175 		f->rect = sel->r;
1176 		/* Same crop rectangle on the source pad */
1177 		fimc->out_frame.rect = sel->r;
1178 		set_bit(ST_FLITE_CONFIG, &fimc->state);
1179 		spin_unlock_irqrestore(&fimc->slock, flags);
1180 	}
1181 	mutex_unlock(&fimc->lock);
1182 
1183 	v4l2_dbg(1, debug, sd, "%s: (%d,%d) %dx%d, f_w: %d, f_h: %d\n",
1184 		 __func__, f->rect.left, f->rect.top, f->rect.width,
1185 		 f->rect.height, f->f_width, f->f_height);
1186 
1187 	return ret;
1188 }
1189 
1190 static int fimc_lite_subdev_s_stream(struct v4l2_subdev *sd, int on)
1191 {
1192 	struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1193 	unsigned long flags;
1194 	int ret;
1195 
1196 	/*
1197 	 * Find sensor subdev linked to FIMC-LITE directly or through
1198 	 * MIPI-CSIS. This is required for configuration where FIMC-LITE
1199 	 * is used as a subdev only and feeds data internally to FIMC-IS.
1200 	 * The pipeline links are protected through entity.pipe so there is no
1201 	 * need to take the media graph mutex here.
1202 	 */
1203 	fimc->sensor = fimc_find_remote_sensor(&sd->entity);
1204 
1205 	if (atomic_read(&fimc->out_path) != FIMC_IO_ISP)
1206 		return -ENOIOCTLCMD;
1207 
1208 	mutex_lock(&fimc->lock);
1209 	if (on) {
1210 		flite_hw_reset(fimc);
1211 		ret = fimc_lite_hw_init(fimc, true);
1212 		if (!ret) {
1213 			spin_lock_irqsave(&fimc->slock, flags);
1214 			flite_hw_capture_start(fimc);
1215 			spin_unlock_irqrestore(&fimc->slock, flags);
1216 		}
1217 	} else {
1218 		set_bit(ST_FLITE_OFF, &fimc->state);
1219 
1220 		spin_lock_irqsave(&fimc->slock, flags);
1221 		flite_hw_capture_stop(fimc);
1222 		spin_unlock_irqrestore(&fimc->slock, flags);
1223 
1224 		ret = wait_event_timeout(fimc->irq_queue,
1225 				!test_bit(ST_FLITE_OFF, &fimc->state),
1226 				msecs_to_jiffies(200));
1227 		if (ret == 0)
1228 			v4l2_err(sd, "s_stream(0) timeout\n");
1229 		clear_bit(ST_FLITE_RUN, &fimc->state);
1230 	}
1231 
1232 	mutex_unlock(&fimc->lock);
1233 	return ret;
1234 }
1235 
1236 static int fimc_lite_log_status(struct v4l2_subdev *sd)
1237 {
1238 	struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1239 
1240 	flite_hw_dump_regs(fimc, __func__);
1241 	return 0;
1242 }
1243 
1244 static int fimc_lite_subdev_registered(struct v4l2_subdev *sd)
1245 {
1246 	struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1247 	struct vb2_queue *q = &fimc->vb_queue;
1248 	struct video_device *vfd = &fimc->ve.vdev;
1249 	int ret;
1250 
1251 	memset(vfd, 0, sizeof(*vfd));
1252 	atomic_set(&fimc->out_path, FIMC_IO_DMA);
1253 
1254 	snprintf(vfd->name, sizeof(vfd->name), "fimc-lite.%d.capture",
1255 		 fimc->index);
1256 
1257 	vfd->fops = &fimc_lite_fops;
1258 	vfd->ioctl_ops = &fimc_lite_ioctl_ops;
1259 	vfd->v4l2_dev = sd->v4l2_dev;
1260 	vfd->minor = -1;
1261 	vfd->release = video_device_release_empty;
1262 	vfd->queue = q;
1263 	vfd->device_caps = V4L2_CAP_VIDEO_CAPTURE_MPLANE | V4L2_CAP_STREAMING;
1264 	fimc->reqbufs_count = 0;
1265 
1266 	INIT_LIST_HEAD(&fimc->pending_buf_q);
1267 	INIT_LIST_HEAD(&fimc->active_buf_q);
1268 
1269 	memset(q, 0, sizeof(*q));
1270 	q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
1271 	q->io_modes = VB2_MMAP | VB2_USERPTR;
1272 	q->ops = &fimc_lite_qops;
1273 	q->mem_ops = &vb2_dma_contig_memops;
1274 	q->buf_struct_size = sizeof(struct flite_buffer);
1275 	q->drv_priv = fimc;
1276 	q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1277 	q->lock = &fimc->lock;
1278 	q->dev = &fimc->pdev->dev;
1279 
1280 	ret = vb2_queue_init(q);
1281 	if (ret < 0)
1282 		return ret;
1283 
1284 	fimc->vd_pad.flags = MEDIA_PAD_FL_SINK;
1285 	ret = media_entity_pads_init(&vfd->entity, 1, &fimc->vd_pad);
1286 	if (ret < 0)
1287 		return ret;
1288 
1289 	video_set_drvdata(vfd, fimc);
1290 	fimc->ve.pipe = v4l2_get_subdev_hostdata(sd);
1291 
1292 	ret = video_register_device(vfd, VFL_TYPE_VIDEO, -1);
1293 	if (ret < 0) {
1294 		media_entity_cleanup(&vfd->entity);
1295 		fimc->ve.pipe = NULL;
1296 		return ret;
1297 	}
1298 
1299 	v4l2_info(sd->v4l2_dev, "Registered %s as /dev/%s\n",
1300 		  vfd->name, video_device_node_name(vfd));
1301 	return 0;
1302 }
1303 
1304 static void fimc_lite_subdev_unregistered(struct v4l2_subdev *sd)
1305 {
1306 	struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1307 
1308 	if (fimc == NULL)
1309 		return;
1310 
1311 	mutex_lock(&fimc->lock);
1312 
1313 	if (video_is_registered(&fimc->ve.vdev)) {
1314 		video_unregister_device(&fimc->ve.vdev);
1315 		media_entity_cleanup(&fimc->ve.vdev.entity);
1316 		fimc->ve.pipe = NULL;
1317 	}
1318 
1319 	mutex_unlock(&fimc->lock);
1320 }
1321 
1322 static const struct v4l2_subdev_internal_ops fimc_lite_subdev_internal_ops = {
1323 	.registered = fimc_lite_subdev_registered,
1324 	.unregistered = fimc_lite_subdev_unregistered,
1325 };
1326 
1327 static const struct v4l2_subdev_pad_ops fimc_lite_subdev_pad_ops = {
1328 	.enum_mbus_code = fimc_lite_subdev_enum_mbus_code,
1329 	.get_selection = fimc_lite_subdev_get_selection,
1330 	.set_selection = fimc_lite_subdev_set_selection,
1331 	.get_fmt = fimc_lite_subdev_get_fmt,
1332 	.set_fmt = fimc_lite_subdev_set_fmt,
1333 };
1334 
1335 static const struct v4l2_subdev_video_ops fimc_lite_subdev_video_ops = {
1336 	.s_stream = fimc_lite_subdev_s_stream,
1337 };
1338 
1339 static const struct v4l2_subdev_core_ops fimc_lite_core_ops = {
1340 	.log_status = fimc_lite_log_status,
1341 };
1342 
1343 static const struct v4l2_subdev_ops fimc_lite_subdev_ops = {
1344 	.core = &fimc_lite_core_ops,
1345 	.video = &fimc_lite_subdev_video_ops,
1346 	.pad = &fimc_lite_subdev_pad_ops,
1347 };
1348 
1349 static int fimc_lite_s_ctrl(struct v4l2_ctrl *ctrl)
1350 {
1351 	struct fimc_lite *fimc = container_of(ctrl->handler, struct fimc_lite,
1352 					      ctrl_handler);
1353 	set_bit(ST_FLITE_CONFIG, &fimc->state);
1354 	return 0;
1355 }
1356 
1357 static const struct v4l2_ctrl_ops fimc_lite_ctrl_ops = {
1358 	.s_ctrl	= fimc_lite_s_ctrl,
1359 };
1360 
1361 static const struct v4l2_ctrl_config fimc_lite_ctrl = {
1362 	.ops	= &fimc_lite_ctrl_ops,
1363 	.id	= V4L2_CTRL_CLASS_USER | 0x1001,
1364 	.type	= V4L2_CTRL_TYPE_BOOLEAN,
1365 	.name	= "Test Pattern 640x480",
1366 	.step	= 1,
1367 };
1368 
1369 static void fimc_lite_set_default_config(struct fimc_lite *fimc)
1370 {
1371 	struct flite_frame *sink = &fimc->inp_frame;
1372 	struct flite_frame *source = &fimc->out_frame;
1373 
1374 	sink->fmt = &fimc_lite_formats[0];
1375 	sink->f_width = FLITE_DEFAULT_WIDTH;
1376 	sink->f_height = FLITE_DEFAULT_HEIGHT;
1377 
1378 	sink->rect.width = FLITE_DEFAULT_WIDTH;
1379 	sink->rect.height = FLITE_DEFAULT_HEIGHT;
1380 	sink->rect.left = 0;
1381 	sink->rect.top = 0;
1382 
1383 	*source = *sink;
1384 }
1385 
1386 static int fimc_lite_create_capture_subdev(struct fimc_lite *fimc)
1387 {
1388 	struct v4l2_ctrl_handler *handler = &fimc->ctrl_handler;
1389 	struct v4l2_subdev *sd = &fimc->subdev;
1390 	int ret;
1391 
1392 	v4l2_subdev_init(sd, &fimc_lite_subdev_ops);
1393 	sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
1394 	snprintf(sd->name, sizeof(sd->name), "FIMC-LITE.%d", fimc->index);
1395 
1396 	fimc->subdev_pads[FLITE_SD_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
1397 	fimc->subdev_pads[FLITE_SD_PAD_SOURCE_DMA].flags = MEDIA_PAD_FL_SOURCE;
1398 	fimc->subdev_pads[FLITE_SD_PAD_SOURCE_ISP].flags = MEDIA_PAD_FL_SOURCE;
1399 	ret = media_entity_pads_init(&sd->entity, FLITE_SD_PADS_NUM,
1400 				fimc->subdev_pads);
1401 	if (ret)
1402 		return ret;
1403 
1404 	v4l2_ctrl_handler_init(handler, 1);
1405 	fimc->test_pattern = v4l2_ctrl_new_custom(handler, &fimc_lite_ctrl,
1406 						  NULL);
1407 	if (handler->error) {
1408 		media_entity_cleanup(&sd->entity);
1409 		return handler->error;
1410 	}
1411 
1412 	sd->ctrl_handler = handler;
1413 	sd->internal_ops = &fimc_lite_subdev_internal_ops;
1414 	sd->entity.function = MEDIA_ENT_F_PROC_VIDEO_SCALER;
1415 	sd->entity.ops = &fimc_lite_subdev_media_ops;
1416 	sd->owner = THIS_MODULE;
1417 	v4l2_set_subdevdata(sd, fimc);
1418 
1419 	return 0;
1420 }
1421 
1422 static void fimc_lite_unregister_capture_subdev(struct fimc_lite *fimc)
1423 {
1424 	struct v4l2_subdev *sd = &fimc->subdev;
1425 
1426 	v4l2_device_unregister_subdev(sd);
1427 	media_entity_cleanup(&sd->entity);
1428 	v4l2_ctrl_handler_free(&fimc->ctrl_handler);
1429 	v4l2_set_subdevdata(sd, NULL);
1430 }
1431 
1432 static void fimc_lite_clk_put(struct fimc_lite *fimc)
1433 {
1434 	if (IS_ERR(fimc->clock))
1435 		return;
1436 
1437 	clk_put(fimc->clock);
1438 	fimc->clock = ERR_PTR(-EINVAL);
1439 }
1440 
1441 static int fimc_lite_clk_get(struct fimc_lite *fimc)
1442 {
1443 	fimc->clock = clk_get(&fimc->pdev->dev, FLITE_CLK_NAME);
1444 	return PTR_ERR_OR_ZERO(fimc->clock);
1445 }
1446 
1447 static const struct of_device_id flite_of_match[];
1448 
1449 static int fimc_lite_probe(struct platform_device *pdev)
1450 {
1451 	struct flite_drvdata *drv_data = NULL;
1452 	struct device *dev = &pdev->dev;
1453 	const struct of_device_id *of_id;
1454 	struct fimc_lite *fimc;
1455 	struct resource *res;
1456 	int ret;
1457 	int irq;
1458 
1459 	if (!dev->of_node)
1460 		return -ENODEV;
1461 
1462 	fimc = devm_kzalloc(dev, sizeof(*fimc), GFP_KERNEL);
1463 	if (!fimc)
1464 		return -ENOMEM;
1465 
1466 	of_id = of_match_node(flite_of_match, dev->of_node);
1467 	if (of_id)
1468 		drv_data = (struct flite_drvdata *)of_id->data;
1469 	fimc->index = of_alias_get_id(dev->of_node, "fimc-lite");
1470 
1471 	if (!drv_data || fimc->index >= drv_data->num_instances ||
1472 						fimc->index < 0) {
1473 		dev_err(dev, "Wrong %pOF node alias\n", dev->of_node);
1474 		return -EINVAL;
1475 	}
1476 
1477 	fimc->dd = drv_data;
1478 	fimc->pdev = pdev;
1479 
1480 	init_waitqueue_head(&fimc->irq_queue);
1481 	spin_lock_init(&fimc->slock);
1482 	mutex_init(&fimc->lock);
1483 
1484 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1485 	fimc->regs = devm_ioremap_resource(dev, res);
1486 	if (IS_ERR(fimc->regs))
1487 		return PTR_ERR(fimc->regs);
1488 
1489 	irq = platform_get_irq(pdev, 0);
1490 	if (irq < 0)
1491 		return irq;
1492 
1493 	ret = fimc_lite_clk_get(fimc);
1494 	if (ret)
1495 		return ret;
1496 
1497 	ret = devm_request_irq(dev, irq, flite_irq_handler,
1498 			       0, dev_name(dev), fimc);
1499 	if (ret) {
1500 		dev_err(dev, "Failed to install irq (%d)\n", ret);
1501 		goto err_clk_put;
1502 	}
1503 
1504 	/* The video node will be created within the subdev's registered() op */
1505 	ret = fimc_lite_create_capture_subdev(fimc);
1506 	if (ret)
1507 		goto err_clk_put;
1508 
1509 	platform_set_drvdata(pdev, fimc);
1510 	pm_runtime_enable(dev);
1511 
1512 	if (!pm_runtime_enabled(dev)) {
1513 		ret = clk_prepare_enable(fimc->clock);
1514 		if (ret < 0)
1515 			goto err_sd;
1516 	}
1517 
1518 	vb2_dma_contig_set_max_seg_size(dev, DMA_BIT_MASK(32));
1519 
1520 	fimc_lite_set_default_config(fimc);
1521 
1522 	dev_dbg(dev, "FIMC-LITE.%d registered successfully\n",
1523 		fimc->index);
1524 	return 0;
1525 
1526 err_sd:
1527 	fimc_lite_unregister_capture_subdev(fimc);
1528 err_clk_put:
1529 	fimc_lite_clk_put(fimc);
1530 	return ret;
1531 }
1532 
1533 #ifdef CONFIG_PM
1534 static int fimc_lite_runtime_resume(struct device *dev)
1535 {
1536 	struct fimc_lite *fimc = dev_get_drvdata(dev);
1537 
1538 	clk_prepare_enable(fimc->clock);
1539 	return 0;
1540 }
1541 
1542 static int fimc_lite_runtime_suspend(struct device *dev)
1543 {
1544 	struct fimc_lite *fimc = dev_get_drvdata(dev);
1545 
1546 	clk_disable_unprepare(fimc->clock);
1547 	return 0;
1548 }
1549 #endif
1550 
1551 #ifdef CONFIG_PM_SLEEP
1552 static int fimc_lite_resume(struct device *dev)
1553 {
1554 	struct fimc_lite *fimc = dev_get_drvdata(dev);
1555 	struct flite_buffer *buf;
1556 	unsigned long flags;
1557 	int i;
1558 
1559 	spin_lock_irqsave(&fimc->slock, flags);
1560 	if (!test_and_clear_bit(ST_LPM, &fimc->state) ||
1561 	    !test_bit(ST_FLITE_IN_USE, &fimc->state)) {
1562 		spin_unlock_irqrestore(&fimc->slock, flags);
1563 		return 0;
1564 	}
1565 	flite_hw_reset(fimc);
1566 	spin_unlock_irqrestore(&fimc->slock, flags);
1567 
1568 	if (!test_and_clear_bit(ST_FLITE_SUSPENDED, &fimc->state))
1569 		return 0;
1570 
1571 	INIT_LIST_HEAD(&fimc->active_buf_q);
1572 	fimc_pipeline_call(&fimc->ve, open,
1573 			   &fimc->ve.vdev.entity, false);
1574 	fimc_lite_hw_init(fimc, atomic_read(&fimc->out_path) == FIMC_IO_ISP);
1575 	clear_bit(ST_FLITE_SUSPENDED, &fimc->state);
1576 
1577 	for (i = 0; i < fimc->reqbufs_count; i++) {
1578 		if (list_empty(&fimc->pending_buf_q))
1579 			break;
1580 		buf = fimc_lite_pending_queue_pop(fimc);
1581 		buffer_queue(&buf->vb.vb2_buf);
1582 	}
1583 	return 0;
1584 }
1585 
1586 static int fimc_lite_suspend(struct device *dev)
1587 {
1588 	struct fimc_lite *fimc = dev_get_drvdata(dev);
1589 	bool suspend = test_bit(ST_FLITE_IN_USE, &fimc->state);
1590 	int ret;
1591 
1592 	if (test_and_set_bit(ST_LPM, &fimc->state))
1593 		return 0;
1594 
1595 	ret = fimc_lite_stop_capture(fimc, suspend);
1596 	if (ret < 0 || !fimc_lite_active(fimc))
1597 		return ret;
1598 
1599 	return fimc_pipeline_call(&fimc->ve, close);
1600 }
1601 #endif /* CONFIG_PM_SLEEP */
1602 
1603 static int fimc_lite_remove(struct platform_device *pdev)
1604 {
1605 	struct fimc_lite *fimc = platform_get_drvdata(pdev);
1606 	struct device *dev = &pdev->dev;
1607 
1608 	if (!pm_runtime_enabled(dev))
1609 		clk_disable_unprepare(fimc->clock);
1610 
1611 	pm_runtime_disable(dev);
1612 	pm_runtime_set_suspended(dev);
1613 	fimc_lite_unregister_capture_subdev(fimc);
1614 	vb2_dma_contig_clear_max_seg_size(dev);
1615 	fimc_lite_clk_put(fimc);
1616 
1617 	dev_info(dev, "Driver unloaded\n");
1618 	return 0;
1619 }
1620 
1621 static const struct dev_pm_ops fimc_lite_pm_ops = {
1622 	SET_SYSTEM_SLEEP_PM_OPS(fimc_lite_suspend, fimc_lite_resume)
1623 	SET_RUNTIME_PM_OPS(fimc_lite_runtime_suspend, fimc_lite_runtime_resume,
1624 			   NULL)
1625 };
1626 
1627 /* EXYNOS4412 */
1628 static struct flite_drvdata fimc_lite_drvdata_exynos4 = {
1629 	.max_width		= 8192,
1630 	.max_height		= 8192,
1631 	.out_width_align	= 8,
1632 	.win_hor_offs_align	= 2,
1633 	.out_hor_offs_align	= 8,
1634 	.max_dma_bufs		= 1,
1635 	.num_instances		= 2,
1636 };
1637 
1638 /* EXYNOS5250 */
1639 static struct flite_drvdata fimc_lite_drvdata_exynos5 = {
1640 	.max_width		= 8192,
1641 	.max_height		= 8192,
1642 	.out_width_align	= 8,
1643 	.win_hor_offs_align	= 2,
1644 	.out_hor_offs_align	= 8,
1645 	.max_dma_bufs		= 32,
1646 	.num_instances		= 3,
1647 };
1648 
1649 static const struct of_device_id flite_of_match[] = {
1650 	{
1651 		.compatible = "samsung,exynos4212-fimc-lite",
1652 		.data = &fimc_lite_drvdata_exynos4,
1653 	},
1654 	{
1655 		.compatible = "samsung,exynos5250-fimc-lite",
1656 		.data = &fimc_lite_drvdata_exynos5,
1657 	},
1658 	{ /* sentinel */ },
1659 };
1660 MODULE_DEVICE_TABLE(of, flite_of_match);
1661 
1662 static struct platform_driver fimc_lite_driver = {
1663 	.probe		= fimc_lite_probe,
1664 	.remove		= fimc_lite_remove,
1665 	.driver = {
1666 		.of_match_table = flite_of_match,
1667 		.name		= FIMC_LITE_DRV_NAME,
1668 		.pm		= &fimc_lite_pm_ops,
1669 	}
1670 };
1671 module_platform_driver(fimc_lite_driver);
1672 MODULE_LICENSE("GPL");
1673 MODULE_ALIAS("platform:" FIMC_LITE_DRV_NAME);
1674