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 	strscpy(cap->driver, FIMC_LITE_DRV_NAME, sizeof(cap->driver));
650 	strscpy(cap->card, FIMC_LITE_DRV_NAME, sizeof(cap->card));
651 	return 0;
652 }
653 
654 static int fimc_lite_enum_fmt(struct file *file, void *priv,
655 			      struct v4l2_fmtdesc *f)
656 {
657 	const struct fimc_fmt *fmt;
658 
659 	if (f->index >= ARRAY_SIZE(fimc_lite_formats))
660 		return -EINVAL;
661 
662 	fmt = &fimc_lite_formats[f->index];
663 	f->pixelformat = fmt->fourcc;
664 
665 	return 0;
666 }
667 
668 static int fimc_lite_g_fmt_mplane(struct file *file, void *fh,
669 				  struct v4l2_format *f)
670 {
671 	struct fimc_lite *fimc = video_drvdata(file);
672 	struct v4l2_pix_format_mplane *pixm = &f->fmt.pix_mp;
673 	struct v4l2_plane_pix_format *plane_fmt = &pixm->plane_fmt[0];
674 	struct flite_frame *frame = &fimc->out_frame;
675 	const struct fimc_fmt *fmt = frame->fmt;
676 
677 	plane_fmt->bytesperline = (frame->f_width * fmt->depth[0]) / 8;
678 	plane_fmt->sizeimage = plane_fmt->bytesperline * frame->f_height;
679 
680 	pixm->num_planes = fmt->memplanes;
681 	pixm->pixelformat = fmt->fourcc;
682 	pixm->width = frame->f_width;
683 	pixm->height = frame->f_height;
684 	pixm->field = V4L2_FIELD_NONE;
685 	pixm->colorspace = fmt->colorspace;
686 	return 0;
687 }
688 
689 static int fimc_lite_try_fmt(struct fimc_lite *fimc,
690 			     struct v4l2_pix_format_mplane *pixm,
691 			     const struct fimc_fmt **ffmt)
692 {
693 	u32 bpl = pixm->plane_fmt[0].bytesperline;
694 	struct flite_drvdata *dd = fimc->dd;
695 	const struct fimc_fmt *inp_fmt = fimc->inp_frame.fmt;
696 	const struct fimc_fmt *fmt;
697 
698 	if (WARN_ON(inp_fmt == NULL))
699 		return -EINVAL;
700 	/*
701 	 * We allow some flexibility only for YUV formats. In case of raw
702 	 * raw Bayer the FIMC-LITE's output format must match its camera
703 	 * interface input format.
704 	 */
705 	if (inp_fmt->flags & FMT_FLAGS_YUV)
706 		fmt = fimc_lite_find_format(&pixm->pixelformat, NULL,
707 						inp_fmt->flags, 0);
708 	else
709 		fmt = inp_fmt;
710 
711 	if (WARN_ON(fmt == NULL))
712 		return -EINVAL;
713 	if (ffmt)
714 		*ffmt = fmt;
715 	v4l_bound_align_image(&pixm->width, 8, dd->max_width,
716 			      ffs(dd->out_width_align) - 1,
717 			      &pixm->height, 0, dd->max_height, 0, 0);
718 
719 	if ((bpl == 0 || ((bpl * 8) / fmt->depth[0]) < pixm->width))
720 		pixm->plane_fmt[0].bytesperline = (pixm->width *
721 						   fmt->depth[0]) / 8;
722 
723 	if (pixm->plane_fmt[0].sizeimage == 0)
724 		pixm->plane_fmt[0].sizeimage = (pixm->width * pixm->height *
725 						fmt->depth[0]) / 8;
726 	pixm->num_planes = fmt->memplanes;
727 	pixm->pixelformat = fmt->fourcc;
728 	pixm->colorspace = fmt->colorspace;
729 	pixm->field = V4L2_FIELD_NONE;
730 	return 0;
731 }
732 
733 static int fimc_lite_try_fmt_mplane(struct file *file, void *fh,
734 				    struct v4l2_format *f)
735 {
736 	struct fimc_lite *fimc = video_drvdata(file);
737 	return fimc_lite_try_fmt(fimc, &f->fmt.pix_mp, NULL);
738 }
739 
740 static int fimc_lite_s_fmt_mplane(struct file *file, void *priv,
741 				  struct v4l2_format *f)
742 {
743 	struct v4l2_pix_format_mplane *pixm = &f->fmt.pix_mp;
744 	struct fimc_lite *fimc = video_drvdata(file);
745 	struct flite_frame *frame = &fimc->out_frame;
746 	const struct fimc_fmt *fmt = NULL;
747 	int ret;
748 
749 	if (vb2_is_busy(&fimc->vb_queue))
750 		return -EBUSY;
751 
752 	ret = fimc_lite_try_fmt(fimc, &f->fmt.pix_mp, &fmt);
753 	if (ret < 0)
754 		return ret;
755 
756 	frame->fmt = fmt;
757 	fimc->payload[0] = max((pixm->width * pixm->height * fmt->depth[0]) / 8,
758 			       pixm->plane_fmt[0].sizeimage);
759 	frame->f_width = pixm->width;
760 	frame->f_height = pixm->height;
761 
762 	return 0;
763 }
764 
765 static int fimc_pipeline_validate(struct fimc_lite *fimc)
766 {
767 	struct v4l2_subdev *sd = &fimc->subdev;
768 	struct v4l2_subdev_format sink_fmt, src_fmt;
769 	struct media_pad *pad;
770 	int ret;
771 
772 	while (1) {
773 		/* Retrieve format at the sink pad */
774 		pad = &sd->entity.pads[0];
775 		if (!(pad->flags & MEDIA_PAD_FL_SINK))
776 			break;
777 		/* Don't call FIMC subdev operation to avoid nested locking */
778 		if (sd == &fimc->subdev) {
779 			struct flite_frame *ff = &fimc->out_frame;
780 			sink_fmt.format.width = ff->f_width;
781 			sink_fmt.format.height = ff->f_height;
782 			sink_fmt.format.code = fimc->inp_frame.fmt->mbus_code;
783 		} else {
784 			sink_fmt.pad = pad->index;
785 			sink_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
786 			ret = v4l2_subdev_call(sd, pad, get_fmt, NULL,
787 					       &sink_fmt);
788 			if (ret < 0 && ret != -ENOIOCTLCMD)
789 				return -EPIPE;
790 		}
791 		/* Retrieve format at the source pad */
792 		pad = media_entity_remote_pad(pad);
793 		if (!pad || !is_media_entity_v4l2_subdev(pad->entity))
794 			break;
795 
796 		sd = media_entity_to_v4l2_subdev(pad->entity);
797 		src_fmt.pad = pad->index;
798 		src_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
799 		ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &src_fmt);
800 		if (ret < 0 && ret != -ENOIOCTLCMD)
801 			return -EPIPE;
802 
803 		if (src_fmt.format.width != sink_fmt.format.width ||
804 		    src_fmt.format.height != sink_fmt.format.height ||
805 		    src_fmt.format.code != sink_fmt.format.code)
806 			return -EPIPE;
807 	}
808 	return 0;
809 }
810 
811 static int fimc_lite_streamon(struct file *file, void *priv,
812 			      enum v4l2_buf_type type)
813 {
814 	struct fimc_lite *fimc = video_drvdata(file);
815 	struct media_entity *entity = &fimc->ve.vdev.entity;
816 	int ret;
817 
818 	if (fimc_lite_active(fimc))
819 		return -EBUSY;
820 
821 	ret = media_pipeline_start(entity, &fimc->ve.pipe->mp);
822 	if (ret < 0)
823 		return ret;
824 
825 	ret = fimc_pipeline_validate(fimc);
826 	if (ret < 0)
827 		goto err_p_stop;
828 
829 	fimc->sensor = fimc_find_remote_sensor(&fimc->subdev.entity);
830 
831 	ret = vb2_ioctl_streamon(file, priv, type);
832 	if (!ret) {
833 		fimc->streaming = true;
834 		return ret;
835 	}
836 
837 err_p_stop:
838 	media_pipeline_stop(entity);
839 	return 0;
840 }
841 
842 static int fimc_lite_streamoff(struct file *file, void *priv,
843 			       enum v4l2_buf_type type)
844 {
845 	struct fimc_lite *fimc = video_drvdata(file);
846 	int ret;
847 
848 	ret = vb2_ioctl_streamoff(file, priv, type);
849 	if (ret < 0)
850 		return ret;
851 
852 	media_pipeline_stop(&fimc->ve.vdev.entity);
853 	fimc->streaming = false;
854 	return 0;
855 }
856 
857 static int fimc_lite_reqbufs(struct file *file, void *priv,
858 			     struct v4l2_requestbuffers *reqbufs)
859 {
860 	struct fimc_lite *fimc = video_drvdata(file);
861 	int ret;
862 
863 	reqbufs->count = max_t(u32, FLITE_REQ_BUFS_MIN, reqbufs->count);
864 	ret = vb2_ioctl_reqbufs(file, priv, reqbufs);
865 	if (!ret)
866 		fimc->reqbufs_count = reqbufs->count;
867 
868 	return ret;
869 }
870 
871 static int fimc_lite_g_selection(struct file *file, void *fh,
872 				 struct v4l2_selection *sel)
873 {
874 	struct fimc_lite *fimc = video_drvdata(file);
875 	struct flite_frame *f = &fimc->out_frame;
876 
877 	if (sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
878 		return -EINVAL;
879 
880 	switch (sel->target) {
881 	case V4L2_SEL_TGT_COMPOSE_BOUNDS:
882 	case V4L2_SEL_TGT_COMPOSE_DEFAULT:
883 		sel->r.left = 0;
884 		sel->r.top = 0;
885 		sel->r.width = f->f_width;
886 		sel->r.height = f->f_height;
887 		return 0;
888 
889 	case V4L2_SEL_TGT_COMPOSE:
890 		sel->r = f->rect;
891 		return 0;
892 	}
893 
894 	return -EINVAL;
895 }
896 
897 static int fimc_lite_s_selection(struct file *file, void *fh,
898 				 struct v4l2_selection *sel)
899 {
900 	struct fimc_lite *fimc = video_drvdata(file);
901 	struct flite_frame *f = &fimc->out_frame;
902 	struct v4l2_rect rect = sel->r;
903 	unsigned long flags;
904 
905 	if (sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
906 	    sel->target != V4L2_SEL_TGT_COMPOSE)
907 		return -EINVAL;
908 
909 	fimc_lite_try_compose(fimc, &rect);
910 
911 	if ((sel->flags & V4L2_SEL_FLAG_LE) &&
912 	    !v4l2_rect_enclosed(&rect, &sel->r))
913 		return -ERANGE;
914 
915 	if ((sel->flags & V4L2_SEL_FLAG_GE) &&
916 	    !v4l2_rect_enclosed(&sel->r, &rect))
917 		return -ERANGE;
918 
919 	sel->r = rect;
920 	spin_lock_irqsave(&fimc->slock, flags);
921 	f->rect = rect;
922 	set_bit(ST_FLITE_CONFIG, &fimc->state);
923 	spin_unlock_irqrestore(&fimc->slock, flags);
924 
925 	return 0;
926 }
927 
928 static const struct v4l2_ioctl_ops fimc_lite_ioctl_ops = {
929 	.vidioc_querycap		= fimc_lite_querycap,
930 	.vidioc_enum_fmt_vid_cap	= fimc_lite_enum_fmt,
931 	.vidioc_try_fmt_vid_cap_mplane	= fimc_lite_try_fmt_mplane,
932 	.vidioc_s_fmt_vid_cap_mplane	= fimc_lite_s_fmt_mplane,
933 	.vidioc_g_fmt_vid_cap_mplane	= fimc_lite_g_fmt_mplane,
934 	.vidioc_g_selection		= fimc_lite_g_selection,
935 	.vidioc_s_selection		= fimc_lite_s_selection,
936 	.vidioc_reqbufs			= fimc_lite_reqbufs,
937 	.vidioc_querybuf		= vb2_ioctl_querybuf,
938 	.vidioc_prepare_buf		= vb2_ioctl_prepare_buf,
939 	.vidioc_create_bufs		= vb2_ioctl_create_bufs,
940 	.vidioc_qbuf			= vb2_ioctl_qbuf,
941 	.vidioc_dqbuf			= vb2_ioctl_dqbuf,
942 	.vidioc_streamon		= fimc_lite_streamon,
943 	.vidioc_streamoff		= fimc_lite_streamoff,
944 };
945 
946 /* Capture subdev media entity operations */
947 static int fimc_lite_link_setup(struct media_entity *entity,
948 				const struct media_pad *local,
949 				const struct media_pad *remote, u32 flags)
950 {
951 	struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity);
952 	struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
953 	int ret = 0;
954 
955 	if (WARN_ON(fimc == NULL))
956 		return 0;
957 
958 	v4l2_dbg(1, debug, sd, "%s: %s --> %s, flags: 0x%x. source_id: 0x%x\n",
959 		 __func__, remote->entity->name, local->entity->name,
960 		 flags, fimc->source_subdev_grp_id);
961 
962 	switch (local->index) {
963 	case FLITE_SD_PAD_SINK:
964 		if (flags & MEDIA_LNK_FL_ENABLED) {
965 			if (fimc->source_subdev_grp_id == 0)
966 				fimc->source_subdev_grp_id = sd->grp_id;
967 			else
968 				ret = -EBUSY;
969 		} else {
970 			fimc->source_subdev_grp_id = 0;
971 			fimc->sensor = NULL;
972 		}
973 		break;
974 
975 	case FLITE_SD_PAD_SOURCE_DMA:
976 		if (!(flags & MEDIA_LNK_FL_ENABLED))
977 			atomic_set(&fimc->out_path, FIMC_IO_NONE);
978 		else
979 			atomic_set(&fimc->out_path, FIMC_IO_DMA);
980 		break;
981 
982 	case FLITE_SD_PAD_SOURCE_ISP:
983 		if (!(flags & MEDIA_LNK_FL_ENABLED))
984 			atomic_set(&fimc->out_path, FIMC_IO_NONE);
985 		else
986 			atomic_set(&fimc->out_path, FIMC_IO_ISP);
987 		break;
988 
989 	default:
990 		v4l2_err(sd, "Invalid pad index\n");
991 		ret = -EINVAL;
992 	}
993 	mb();
994 
995 	return ret;
996 }
997 
998 static const struct media_entity_operations fimc_lite_subdev_media_ops = {
999 	.link_setup = fimc_lite_link_setup,
1000 };
1001 
1002 static int fimc_lite_subdev_enum_mbus_code(struct v4l2_subdev *sd,
1003 					   struct v4l2_subdev_state *sd_state,
1004 					   struct v4l2_subdev_mbus_code_enum *code)
1005 {
1006 	const struct fimc_fmt *fmt;
1007 
1008 	fmt = fimc_lite_find_format(NULL, NULL, 0, code->index);
1009 	if (!fmt)
1010 		return -EINVAL;
1011 	code->code = fmt->mbus_code;
1012 	return 0;
1013 }
1014 
1015 static struct v4l2_mbus_framefmt *__fimc_lite_subdev_get_try_fmt(
1016 		struct v4l2_subdev *sd,
1017 		struct v4l2_subdev_state *sd_state, unsigned int pad)
1018 {
1019 	if (pad != FLITE_SD_PAD_SINK)
1020 		pad = FLITE_SD_PAD_SOURCE_DMA;
1021 
1022 	return v4l2_subdev_get_try_format(sd, sd_state, pad);
1023 }
1024 
1025 static int fimc_lite_subdev_get_fmt(struct v4l2_subdev *sd,
1026 				    struct v4l2_subdev_state *sd_state,
1027 				    struct v4l2_subdev_format *fmt)
1028 {
1029 	struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1030 	struct v4l2_mbus_framefmt *mf = &fmt->format;
1031 	struct flite_frame *f = &fimc->inp_frame;
1032 
1033 	if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
1034 		mf = __fimc_lite_subdev_get_try_fmt(sd, sd_state, fmt->pad);
1035 		fmt->format = *mf;
1036 		return 0;
1037 	}
1038 
1039 	mutex_lock(&fimc->lock);
1040 	mf->colorspace = f->fmt->colorspace;
1041 	mf->code = f->fmt->mbus_code;
1042 
1043 	if (fmt->pad == FLITE_SD_PAD_SINK) {
1044 		/* full camera input frame size */
1045 		mf->width = f->f_width;
1046 		mf->height = f->f_height;
1047 	} else {
1048 		/* crop size */
1049 		mf->width = f->rect.width;
1050 		mf->height = f->rect.height;
1051 	}
1052 	mutex_unlock(&fimc->lock);
1053 	return 0;
1054 }
1055 
1056 static int fimc_lite_subdev_set_fmt(struct v4l2_subdev *sd,
1057 				    struct v4l2_subdev_state *sd_state,
1058 				    struct v4l2_subdev_format *fmt)
1059 {
1060 	struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1061 	struct v4l2_mbus_framefmt *mf = &fmt->format;
1062 	struct flite_frame *sink = &fimc->inp_frame;
1063 	struct flite_frame *source = &fimc->out_frame;
1064 	const struct fimc_fmt *ffmt;
1065 
1066 	v4l2_dbg(1, debug, sd, "pad%d: code: 0x%x, %dx%d\n",
1067 		 fmt->pad, mf->code, mf->width, mf->height);
1068 
1069 	mutex_lock(&fimc->lock);
1070 
1071 	if ((atomic_read(&fimc->out_path) == FIMC_IO_ISP &&
1072 	    media_entity_is_streaming(&sd->entity)) ||
1073 	    (atomic_read(&fimc->out_path) == FIMC_IO_DMA &&
1074 	    vb2_is_busy(&fimc->vb_queue))) {
1075 		mutex_unlock(&fimc->lock);
1076 		return -EBUSY;
1077 	}
1078 
1079 	ffmt = fimc_lite_subdev_try_fmt(fimc, sd_state, fmt);
1080 
1081 	if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
1082 		struct v4l2_mbus_framefmt *src_fmt;
1083 
1084 		mf = __fimc_lite_subdev_get_try_fmt(sd, sd_state, fmt->pad);
1085 		*mf = fmt->format;
1086 
1087 		if (fmt->pad == FLITE_SD_PAD_SINK) {
1088 			unsigned int pad = FLITE_SD_PAD_SOURCE_DMA;
1089 			src_fmt = __fimc_lite_subdev_get_try_fmt(sd, sd_state,
1090 								 pad);
1091 			*src_fmt = *mf;
1092 		}
1093 
1094 		mutex_unlock(&fimc->lock);
1095 		return 0;
1096 	}
1097 
1098 	if (fmt->pad == FLITE_SD_PAD_SINK) {
1099 		sink->f_width = mf->width;
1100 		sink->f_height = mf->height;
1101 		sink->fmt = ffmt;
1102 		/* Set sink crop rectangle */
1103 		sink->rect.width = mf->width;
1104 		sink->rect.height = mf->height;
1105 		sink->rect.left = 0;
1106 		sink->rect.top = 0;
1107 		/* Reset source format and crop rectangle */
1108 		source->rect = sink->rect;
1109 		source->f_width = mf->width;
1110 		source->f_height = mf->height;
1111 	}
1112 
1113 	mutex_unlock(&fimc->lock);
1114 	return 0;
1115 }
1116 
1117 static int fimc_lite_subdev_get_selection(struct v4l2_subdev *sd,
1118 					  struct v4l2_subdev_state *sd_state,
1119 					  struct v4l2_subdev_selection *sel)
1120 {
1121 	struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1122 	struct flite_frame *f = &fimc->inp_frame;
1123 
1124 	if ((sel->target != V4L2_SEL_TGT_CROP &&
1125 	     sel->target != V4L2_SEL_TGT_CROP_BOUNDS) ||
1126 	     sel->pad != FLITE_SD_PAD_SINK)
1127 		return -EINVAL;
1128 
1129 	if (sel->which == V4L2_SUBDEV_FORMAT_TRY) {
1130 		sel->r = *v4l2_subdev_get_try_crop(sd, sd_state, sel->pad);
1131 		return 0;
1132 	}
1133 
1134 	mutex_lock(&fimc->lock);
1135 	if (sel->target == V4L2_SEL_TGT_CROP) {
1136 		sel->r = f->rect;
1137 	} else {
1138 		sel->r.left = 0;
1139 		sel->r.top = 0;
1140 		sel->r.width = f->f_width;
1141 		sel->r.height = f->f_height;
1142 	}
1143 	mutex_unlock(&fimc->lock);
1144 
1145 	v4l2_dbg(1, debug, sd, "%s: (%d,%d) %dx%d, f_w: %d, f_h: %d\n",
1146 		 __func__, f->rect.left, f->rect.top, f->rect.width,
1147 		 f->rect.height, f->f_width, f->f_height);
1148 
1149 	return 0;
1150 }
1151 
1152 static int fimc_lite_subdev_set_selection(struct v4l2_subdev *sd,
1153 					  struct v4l2_subdev_state *sd_state,
1154 					  struct v4l2_subdev_selection *sel)
1155 {
1156 	struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1157 	struct flite_frame *f = &fimc->inp_frame;
1158 	int ret = 0;
1159 
1160 	if (sel->target != V4L2_SEL_TGT_CROP || sel->pad != FLITE_SD_PAD_SINK)
1161 		return -EINVAL;
1162 
1163 	mutex_lock(&fimc->lock);
1164 	fimc_lite_try_crop(fimc, &sel->r);
1165 
1166 	if (sel->which == V4L2_SUBDEV_FORMAT_TRY) {
1167 		*v4l2_subdev_get_try_crop(sd, sd_state, sel->pad) = sel->r;
1168 	} else {
1169 		unsigned long flags;
1170 		spin_lock_irqsave(&fimc->slock, flags);
1171 		f->rect = sel->r;
1172 		/* Same crop rectangle on the source pad */
1173 		fimc->out_frame.rect = sel->r;
1174 		set_bit(ST_FLITE_CONFIG, &fimc->state);
1175 		spin_unlock_irqrestore(&fimc->slock, flags);
1176 	}
1177 	mutex_unlock(&fimc->lock);
1178 
1179 	v4l2_dbg(1, debug, sd, "%s: (%d,%d) %dx%d, f_w: %d, f_h: %d\n",
1180 		 __func__, f->rect.left, f->rect.top, f->rect.width,
1181 		 f->rect.height, f->f_width, f->f_height);
1182 
1183 	return ret;
1184 }
1185 
1186 static int fimc_lite_subdev_s_stream(struct v4l2_subdev *sd, int on)
1187 {
1188 	struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1189 	unsigned long flags;
1190 	int ret;
1191 
1192 	/*
1193 	 * Find sensor subdev linked to FIMC-LITE directly or through
1194 	 * MIPI-CSIS. This is required for configuration where FIMC-LITE
1195 	 * is used as a subdev only and feeds data internally to FIMC-IS.
1196 	 * The pipeline links are protected through entity.pipe so there is no
1197 	 * need to take the media graph mutex here.
1198 	 */
1199 	fimc->sensor = fimc_find_remote_sensor(&sd->entity);
1200 
1201 	if (atomic_read(&fimc->out_path) != FIMC_IO_ISP)
1202 		return -ENOIOCTLCMD;
1203 
1204 	mutex_lock(&fimc->lock);
1205 	if (on) {
1206 		flite_hw_reset(fimc);
1207 		ret = fimc_lite_hw_init(fimc, true);
1208 		if (!ret) {
1209 			spin_lock_irqsave(&fimc->slock, flags);
1210 			flite_hw_capture_start(fimc);
1211 			spin_unlock_irqrestore(&fimc->slock, flags);
1212 		}
1213 	} else {
1214 		set_bit(ST_FLITE_OFF, &fimc->state);
1215 
1216 		spin_lock_irqsave(&fimc->slock, flags);
1217 		flite_hw_capture_stop(fimc);
1218 		spin_unlock_irqrestore(&fimc->slock, flags);
1219 
1220 		ret = wait_event_timeout(fimc->irq_queue,
1221 				!test_bit(ST_FLITE_OFF, &fimc->state),
1222 				msecs_to_jiffies(200));
1223 		if (ret == 0)
1224 			v4l2_err(sd, "s_stream(0) timeout\n");
1225 		clear_bit(ST_FLITE_RUN, &fimc->state);
1226 	}
1227 
1228 	mutex_unlock(&fimc->lock);
1229 	return ret;
1230 }
1231 
1232 static int fimc_lite_log_status(struct v4l2_subdev *sd)
1233 {
1234 	struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1235 
1236 	flite_hw_dump_regs(fimc, __func__);
1237 	return 0;
1238 }
1239 
1240 static int fimc_lite_subdev_registered(struct v4l2_subdev *sd)
1241 {
1242 	struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1243 	struct vb2_queue *q = &fimc->vb_queue;
1244 	struct video_device *vfd = &fimc->ve.vdev;
1245 	int ret;
1246 
1247 	memset(vfd, 0, sizeof(*vfd));
1248 	atomic_set(&fimc->out_path, FIMC_IO_DMA);
1249 
1250 	snprintf(vfd->name, sizeof(vfd->name), "fimc-lite.%d.capture",
1251 		 fimc->index);
1252 
1253 	vfd->fops = &fimc_lite_fops;
1254 	vfd->ioctl_ops = &fimc_lite_ioctl_ops;
1255 	vfd->v4l2_dev = sd->v4l2_dev;
1256 	vfd->minor = -1;
1257 	vfd->release = video_device_release_empty;
1258 	vfd->queue = q;
1259 	vfd->device_caps = V4L2_CAP_VIDEO_CAPTURE_MPLANE | V4L2_CAP_STREAMING;
1260 	fimc->reqbufs_count = 0;
1261 
1262 	INIT_LIST_HEAD(&fimc->pending_buf_q);
1263 	INIT_LIST_HEAD(&fimc->active_buf_q);
1264 
1265 	memset(q, 0, sizeof(*q));
1266 	q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
1267 	q->io_modes = VB2_MMAP | VB2_USERPTR;
1268 	q->ops = &fimc_lite_qops;
1269 	q->mem_ops = &vb2_dma_contig_memops;
1270 	q->buf_struct_size = sizeof(struct flite_buffer);
1271 	q->drv_priv = fimc;
1272 	q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1273 	q->lock = &fimc->lock;
1274 	q->dev = &fimc->pdev->dev;
1275 
1276 	ret = vb2_queue_init(q);
1277 	if (ret < 0)
1278 		return ret;
1279 
1280 	fimc->vd_pad.flags = MEDIA_PAD_FL_SINK;
1281 	ret = media_entity_pads_init(&vfd->entity, 1, &fimc->vd_pad);
1282 	if (ret < 0)
1283 		return ret;
1284 
1285 	video_set_drvdata(vfd, fimc);
1286 	fimc->ve.pipe = v4l2_get_subdev_hostdata(sd);
1287 
1288 	ret = video_register_device(vfd, VFL_TYPE_VIDEO, -1);
1289 	if (ret < 0) {
1290 		media_entity_cleanup(&vfd->entity);
1291 		fimc->ve.pipe = NULL;
1292 		return ret;
1293 	}
1294 
1295 	v4l2_info(sd->v4l2_dev, "Registered %s as /dev/%s\n",
1296 		  vfd->name, video_device_node_name(vfd));
1297 	return 0;
1298 }
1299 
1300 static void fimc_lite_subdev_unregistered(struct v4l2_subdev *sd)
1301 {
1302 	struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1303 
1304 	if (fimc == NULL)
1305 		return;
1306 
1307 	mutex_lock(&fimc->lock);
1308 
1309 	if (video_is_registered(&fimc->ve.vdev)) {
1310 		video_unregister_device(&fimc->ve.vdev);
1311 		media_entity_cleanup(&fimc->ve.vdev.entity);
1312 		fimc->ve.pipe = NULL;
1313 	}
1314 
1315 	mutex_unlock(&fimc->lock);
1316 }
1317 
1318 static const struct v4l2_subdev_internal_ops fimc_lite_subdev_internal_ops = {
1319 	.registered = fimc_lite_subdev_registered,
1320 	.unregistered = fimc_lite_subdev_unregistered,
1321 };
1322 
1323 static const struct v4l2_subdev_pad_ops fimc_lite_subdev_pad_ops = {
1324 	.enum_mbus_code = fimc_lite_subdev_enum_mbus_code,
1325 	.get_selection = fimc_lite_subdev_get_selection,
1326 	.set_selection = fimc_lite_subdev_set_selection,
1327 	.get_fmt = fimc_lite_subdev_get_fmt,
1328 	.set_fmt = fimc_lite_subdev_set_fmt,
1329 };
1330 
1331 static const struct v4l2_subdev_video_ops fimc_lite_subdev_video_ops = {
1332 	.s_stream = fimc_lite_subdev_s_stream,
1333 };
1334 
1335 static const struct v4l2_subdev_core_ops fimc_lite_core_ops = {
1336 	.log_status = fimc_lite_log_status,
1337 };
1338 
1339 static const struct v4l2_subdev_ops fimc_lite_subdev_ops = {
1340 	.core = &fimc_lite_core_ops,
1341 	.video = &fimc_lite_subdev_video_ops,
1342 	.pad = &fimc_lite_subdev_pad_ops,
1343 };
1344 
1345 static int fimc_lite_s_ctrl(struct v4l2_ctrl *ctrl)
1346 {
1347 	struct fimc_lite *fimc = container_of(ctrl->handler, struct fimc_lite,
1348 					      ctrl_handler);
1349 	set_bit(ST_FLITE_CONFIG, &fimc->state);
1350 	return 0;
1351 }
1352 
1353 static const struct v4l2_ctrl_ops fimc_lite_ctrl_ops = {
1354 	.s_ctrl	= fimc_lite_s_ctrl,
1355 };
1356 
1357 static const struct v4l2_ctrl_config fimc_lite_ctrl = {
1358 	.ops	= &fimc_lite_ctrl_ops,
1359 	.id	= V4L2_CTRL_CLASS_USER | 0x1001,
1360 	.type	= V4L2_CTRL_TYPE_BOOLEAN,
1361 	.name	= "Test Pattern 640x480",
1362 	.step	= 1,
1363 };
1364 
1365 static void fimc_lite_set_default_config(struct fimc_lite *fimc)
1366 {
1367 	struct flite_frame *sink = &fimc->inp_frame;
1368 	struct flite_frame *source = &fimc->out_frame;
1369 
1370 	sink->fmt = &fimc_lite_formats[0];
1371 	sink->f_width = FLITE_DEFAULT_WIDTH;
1372 	sink->f_height = FLITE_DEFAULT_HEIGHT;
1373 
1374 	sink->rect.width = FLITE_DEFAULT_WIDTH;
1375 	sink->rect.height = FLITE_DEFAULT_HEIGHT;
1376 	sink->rect.left = 0;
1377 	sink->rect.top = 0;
1378 
1379 	*source = *sink;
1380 }
1381 
1382 static int fimc_lite_create_capture_subdev(struct fimc_lite *fimc)
1383 {
1384 	struct v4l2_ctrl_handler *handler = &fimc->ctrl_handler;
1385 	struct v4l2_subdev *sd = &fimc->subdev;
1386 	int ret;
1387 
1388 	v4l2_subdev_init(sd, &fimc_lite_subdev_ops);
1389 	sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
1390 	snprintf(sd->name, sizeof(sd->name), "FIMC-LITE.%d", fimc->index);
1391 
1392 	fimc->subdev_pads[FLITE_SD_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
1393 	fimc->subdev_pads[FLITE_SD_PAD_SOURCE_DMA].flags = MEDIA_PAD_FL_SOURCE;
1394 	fimc->subdev_pads[FLITE_SD_PAD_SOURCE_ISP].flags = MEDIA_PAD_FL_SOURCE;
1395 	ret = media_entity_pads_init(&sd->entity, FLITE_SD_PADS_NUM,
1396 				fimc->subdev_pads);
1397 	if (ret)
1398 		return ret;
1399 
1400 	v4l2_ctrl_handler_init(handler, 1);
1401 	fimc->test_pattern = v4l2_ctrl_new_custom(handler, &fimc_lite_ctrl,
1402 						  NULL);
1403 	if (handler->error) {
1404 		media_entity_cleanup(&sd->entity);
1405 		return handler->error;
1406 	}
1407 
1408 	sd->ctrl_handler = handler;
1409 	sd->internal_ops = &fimc_lite_subdev_internal_ops;
1410 	sd->entity.function = MEDIA_ENT_F_PROC_VIDEO_SCALER;
1411 	sd->entity.ops = &fimc_lite_subdev_media_ops;
1412 	sd->owner = THIS_MODULE;
1413 	v4l2_set_subdevdata(sd, fimc);
1414 
1415 	return 0;
1416 }
1417 
1418 static void fimc_lite_unregister_capture_subdev(struct fimc_lite *fimc)
1419 {
1420 	struct v4l2_subdev *sd = &fimc->subdev;
1421 
1422 	v4l2_device_unregister_subdev(sd);
1423 	media_entity_cleanup(&sd->entity);
1424 	v4l2_ctrl_handler_free(&fimc->ctrl_handler);
1425 	v4l2_set_subdevdata(sd, NULL);
1426 }
1427 
1428 static void fimc_lite_clk_put(struct fimc_lite *fimc)
1429 {
1430 	if (IS_ERR(fimc->clock))
1431 		return;
1432 
1433 	clk_put(fimc->clock);
1434 	fimc->clock = ERR_PTR(-EINVAL);
1435 }
1436 
1437 static int fimc_lite_clk_get(struct fimc_lite *fimc)
1438 {
1439 	fimc->clock = clk_get(&fimc->pdev->dev, FLITE_CLK_NAME);
1440 	return PTR_ERR_OR_ZERO(fimc->clock);
1441 }
1442 
1443 static const struct of_device_id flite_of_match[];
1444 
1445 static int fimc_lite_probe(struct platform_device *pdev)
1446 {
1447 	struct flite_drvdata *drv_data = NULL;
1448 	struct device *dev = &pdev->dev;
1449 	const struct of_device_id *of_id;
1450 	struct fimc_lite *fimc;
1451 	struct resource *res;
1452 	int ret;
1453 	int irq;
1454 
1455 	if (!dev->of_node)
1456 		return -ENODEV;
1457 
1458 	fimc = devm_kzalloc(dev, sizeof(*fimc), GFP_KERNEL);
1459 	if (!fimc)
1460 		return -ENOMEM;
1461 
1462 	of_id = of_match_node(flite_of_match, dev->of_node);
1463 	if (of_id)
1464 		drv_data = (struct flite_drvdata *)of_id->data;
1465 	fimc->index = of_alias_get_id(dev->of_node, "fimc-lite");
1466 
1467 	if (!drv_data || fimc->index >= drv_data->num_instances ||
1468 						fimc->index < 0) {
1469 		dev_err(dev, "Wrong %pOF node alias\n", dev->of_node);
1470 		return -EINVAL;
1471 	}
1472 
1473 	fimc->dd = drv_data;
1474 	fimc->pdev = pdev;
1475 
1476 	init_waitqueue_head(&fimc->irq_queue);
1477 	spin_lock_init(&fimc->slock);
1478 	mutex_init(&fimc->lock);
1479 
1480 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1481 	fimc->regs = devm_ioremap_resource(dev, res);
1482 	if (IS_ERR(fimc->regs))
1483 		return PTR_ERR(fimc->regs);
1484 
1485 	irq = platform_get_irq(pdev, 0);
1486 	if (irq < 0)
1487 		return irq;
1488 
1489 	ret = fimc_lite_clk_get(fimc);
1490 	if (ret)
1491 		return ret;
1492 
1493 	ret = devm_request_irq(dev, irq, flite_irq_handler,
1494 			       0, dev_name(dev), fimc);
1495 	if (ret) {
1496 		dev_err(dev, "Failed to install irq (%d)\n", ret);
1497 		goto err_clk_put;
1498 	}
1499 
1500 	/* The video node will be created within the subdev's registered() op */
1501 	ret = fimc_lite_create_capture_subdev(fimc);
1502 	if (ret)
1503 		goto err_clk_put;
1504 
1505 	platform_set_drvdata(pdev, fimc);
1506 	pm_runtime_enable(dev);
1507 
1508 	if (!pm_runtime_enabled(dev)) {
1509 		ret = clk_prepare_enable(fimc->clock);
1510 		if (ret < 0)
1511 			goto err_sd;
1512 	}
1513 
1514 	vb2_dma_contig_set_max_seg_size(dev, DMA_BIT_MASK(32));
1515 
1516 	fimc_lite_set_default_config(fimc);
1517 
1518 	dev_dbg(dev, "FIMC-LITE.%d registered successfully\n",
1519 		fimc->index);
1520 	return 0;
1521 
1522 err_sd:
1523 	fimc_lite_unregister_capture_subdev(fimc);
1524 err_clk_put:
1525 	fimc_lite_clk_put(fimc);
1526 	return ret;
1527 }
1528 
1529 #ifdef CONFIG_PM
1530 static int fimc_lite_runtime_resume(struct device *dev)
1531 {
1532 	struct fimc_lite *fimc = dev_get_drvdata(dev);
1533 
1534 	clk_prepare_enable(fimc->clock);
1535 	return 0;
1536 }
1537 
1538 static int fimc_lite_runtime_suspend(struct device *dev)
1539 {
1540 	struct fimc_lite *fimc = dev_get_drvdata(dev);
1541 
1542 	clk_disable_unprepare(fimc->clock);
1543 	return 0;
1544 }
1545 #endif
1546 
1547 #ifdef CONFIG_PM_SLEEP
1548 static int fimc_lite_resume(struct device *dev)
1549 {
1550 	struct fimc_lite *fimc = dev_get_drvdata(dev);
1551 	struct flite_buffer *buf;
1552 	unsigned long flags;
1553 	int i;
1554 
1555 	spin_lock_irqsave(&fimc->slock, flags);
1556 	if (!test_and_clear_bit(ST_LPM, &fimc->state) ||
1557 	    !test_bit(ST_FLITE_IN_USE, &fimc->state)) {
1558 		spin_unlock_irqrestore(&fimc->slock, flags);
1559 		return 0;
1560 	}
1561 	flite_hw_reset(fimc);
1562 	spin_unlock_irqrestore(&fimc->slock, flags);
1563 
1564 	if (!test_and_clear_bit(ST_FLITE_SUSPENDED, &fimc->state))
1565 		return 0;
1566 
1567 	INIT_LIST_HEAD(&fimc->active_buf_q);
1568 	fimc_pipeline_call(&fimc->ve, open,
1569 			   &fimc->ve.vdev.entity, false);
1570 	fimc_lite_hw_init(fimc, atomic_read(&fimc->out_path) == FIMC_IO_ISP);
1571 	clear_bit(ST_FLITE_SUSPENDED, &fimc->state);
1572 
1573 	for (i = 0; i < fimc->reqbufs_count; i++) {
1574 		if (list_empty(&fimc->pending_buf_q))
1575 			break;
1576 		buf = fimc_lite_pending_queue_pop(fimc);
1577 		buffer_queue(&buf->vb.vb2_buf);
1578 	}
1579 	return 0;
1580 }
1581 
1582 static int fimc_lite_suspend(struct device *dev)
1583 {
1584 	struct fimc_lite *fimc = dev_get_drvdata(dev);
1585 	bool suspend = test_bit(ST_FLITE_IN_USE, &fimc->state);
1586 	int ret;
1587 
1588 	if (test_and_set_bit(ST_LPM, &fimc->state))
1589 		return 0;
1590 
1591 	ret = fimc_lite_stop_capture(fimc, suspend);
1592 	if (ret < 0 || !fimc_lite_active(fimc))
1593 		return ret;
1594 
1595 	return fimc_pipeline_call(&fimc->ve, close);
1596 }
1597 #endif /* CONFIG_PM_SLEEP */
1598 
1599 static int fimc_lite_remove(struct platform_device *pdev)
1600 {
1601 	struct fimc_lite *fimc = platform_get_drvdata(pdev);
1602 	struct device *dev = &pdev->dev;
1603 
1604 	if (!pm_runtime_enabled(dev))
1605 		clk_disable_unprepare(fimc->clock);
1606 
1607 	pm_runtime_disable(dev);
1608 	pm_runtime_set_suspended(dev);
1609 	fimc_lite_unregister_capture_subdev(fimc);
1610 	vb2_dma_contig_clear_max_seg_size(dev);
1611 	fimc_lite_clk_put(fimc);
1612 
1613 	dev_info(dev, "Driver unloaded\n");
1614 	return 0;
1615 }
1616 
1617 static const struct dev_pm_ops fimc_lite_pm_ops = {
1618 	SET_SYSTEM_SLEEP_PM_OPS(fimc_lite_suspend, fimc_lite_resume)
1619 	SET_RUNTIME_PM_OPS(fimc_lite_runtime_suspend, fimc_lite_runtime_resume,
1620 			   NULL)
1621 };
1622 
1623 /* EXYNOS4412 */
1624 static struct flite_drvdata fimc_lite_drvdata_exynos4 = {
1625 	.max_width		= 8192,
1626 	.max_height		= 8192,
1627 	.out_width_align	= 8,
1628 	.win_hor_offs_align	= 2,
1629 	.out_hor_offs_align	= 8,
1630 	.max_dma_bufs		= 1,
1631 	.num_instances		= 2,
1632 };
1633 
1634 /* EXYNOS5250 */
1635 static struct flite_drvdata fimc_lite_drvdata_exynos5 = {
1636 	.max_width		= 8192,
1637 	.max_height		= 8192,
1638 	.out_width_align	= 8,
1639 	.win_hor_offs_align	= 2,
1640 	.out_hor_offs_align	= 8,
1641 	.max_dma_bufs		= 32,
1642 	.num_instances		= 3,
1643 };
1644 
1645 static const struct of_device_id flite_of_match[] = {
1646 	{
1647 		.compatible = "samsung,exynos4212-fimc-lite",
1648 		.data = &fimc_lite_drvdata_exynos4,
1649 	},
1650 	{
1651 		.compatible = "samsung,exynos5250-fimc-lite",
1652 		.data = &fimc_lite_drvdata_exynos5,
1653 	},
1654 	{ /* sentinel */ },
1655 };
1656 MODULE_DEVICE_TABLE(of, flite_of_match);
1657 
1658 static struct platform_driver fimc_lite_driver = {
1659 	.probe		= fimc_lite_probe,
1660 	.remove		= fimc_lite_remove,
1661 	.driver = {
1662 		.of_match_table = flite_of_match,
1663 		.name		= FIMC_LITE_DRV_NAME,
1664 		.pm		= &fimc_lite_pm_ops,
1665 	}
1666 };
1667 module_platform_driver(fimc_lite_driver);
1668 MODULE_LICENSE("GPL");
1669 MODULE_ALIAS("platform:" FIMC_LITE_DRV_NAME);
1670