xref: /linux/drivers/media/platform/samsung/exynos4-is/fimc-capture.c (revision 79790b6818e96c58fe2bffee1b418c16e64e7b80)
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Samsung S5P/EXYNOS4 SoC series camera interface (camera capture) driver
4  *
5  * Copyright (C) 2010 - 2012 Samsung Electronics Co., Ltd.
6  * Sylwester Nawrocki <s.nawrocki@samsung.com>
7  */
8 
9 #include <linux/module.h>
10 #include <linux/kernel.h>
11 #include <linux/types.h>
12 #include <linux/errno.h>
13 #include <linux/bug.h>
14 #include <linux/interrupt.h>
15 #include <linux/device.h>
16 #include <linux/pm_runtime.h>
17 #include <linux/list.h>
18 #include <linux/slab.h>
19 
20 #include <linux/videodev2.h>
21 #include <media/v4l2-device.h>
22 #include <media/v4l2-ioctl.h>
23 #include <media/v4l2-mem2mem.h>
24 #include <media/v4l2-rect.h>
25 #include <media/videobuf2-v4l2.h>
26 #include <media/videobuf2-dma-contig.h>
27 
28 #include "common.h"
29 #include "fimc-core.h"
30 #include "fimc-reg.h"
31 #include "media-dev.h"
32 
fimc_capture_hw_init(struct fimc_dev * fimc)33 static int fimc_capture_hw_init(struct fimc_dev *fimc)
34 {
35 	struct fimc_source_info *si = &fimc->vid_cap.source_config;
36 	struct fimc_ctx *ctx = fimc->vid_cap.ctx;
37 	int ret;
38 	unsigned long flags;
39 
40 	if (ctx == NULL || ctx->s_frame.fmt == NULL)
41 		return -EINVAL;
42 
43 	if (si->fimc_bus_type == FIMC_BUS_TYPE_ISP_WRITEBACK) {
44 		ret = fimc_hw_camblk_cfg_writeback(fimc);
45 		if (ret < 0)
46 			return ret;
47 	}
48 
49 	spin_lock_irqsave(&fimc->slock, flags);
50 	fimc_prepare_dma_offset(ctx, &ctx->d_frame);
51 	fimc_set_yuv_order(ctx);
52 
53 	fimc_hw_set_camera_polarity(fimc, si);
54 	fimc_hw_set_camera_type(fimc, si);
55 	fimc_hw_set_camera_source(fimc, si);
56 	fimc_hw_set_camera_offset(fimc, &ctx->s_frame);
57 
58 	ret = fimc_set_scaler_info(ctx);
59 	if (!ret) {
60 		fimc_hw_set_input_path(ctx);
61 		fimc_hw_set_prescaler(ctx);
62 		fimc_hw_set_mainscaler(ctx);
63 		fimc_hw_set_target_format(ctx);
64 		fimc_hw_set_rotation(ctx);
65 		fimc_hw_set_effect(ctx);
66 		fimc_hw_set_output_path(ctx);
67 		fimc_hw_set_out_dma(ctx);
68 		if (fimc->drv_data->alpha_color)
69 			fimc_hw_set_rgb_alpha(ctx);
70 		clear_bit(ST_CAPT_APPLY_CFG, &fimc->state);
71 	}
72 	spin_unlock_irqrestore(&fimc->slock, flags);
73 	return ret;
74 }
75 
76 /*
77  * Reinitialize the driver so it is ready to start the streaming again.
78  * Set fimc->state to indicate stream off and the hardware shut down state.
79  * If not suspending (@suspend is false), return any buffers to videobuf2.
80  * Otherwise put any owned buffers onto the pending buffers queue, so they
81  * can be re-spun when the device is being resumed. Also perform FIMC
82  * software reset and disable streaming on the whole pipeline if required.
83  */
fimc_capture_state_cleanup(struct fimc_dev * fimc,bool suspend)84 static int fimc_capture_state_cleanup(struct fimc_dev *fimc, bool suspend)
85 {
86 	struct fimc_vid_cap *cap = &fimc->vid_cap;
87 	struct fimc_vid_buffer *buf;
88 	unsigned long flags;
89 	bool streaming;
90 
91 	spin_lock_irqsave(&fimc->slock, flags);
92 	streaming = fimc->state & (1 << ST_CAPT_ISP_STREAM);
93 
94 	fimc->state &= ~(1 << ST_CAPT_RUN | 1 << ST_CAPT_SHUT |
95 			 1 << ST_CAPT_STREAM | 1 << ST_CAPT_ISP_STREAM);
96 	if (suspend)
97 		fimc->state |= (1 << ST_CAPT_SUSPENDED);
98 	else
99 		fimc->state &= ~(1 << ST_CAPT_PEND | 1 << ST_CAPT_SUSPENDED);
100 
101 	/* Release unused buffers */
102 	while (!suspend && !list_empty(&cap->pending_buf_q)) {
103 		buf = fimc_pending_queue_pop(cap);
104 		vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
105 	}
106 	/* If suspending put unused buffers onto pending queue */
107 	while (!list_empty(&cap->active_buf_q)) {
108 		buf = fimc_active_queue_pop(cap);
109 		if (suspend)
110 			fimc_pending_queue_add(cap, buf);
111 		else
112 			vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
113 	}
114 
115 	fimc_hw_reset(fimc);
116 	cap->buf_index = 0;
117 
118 	spin_unlock_irqrestore(&fimc->slock, flags);
119 
120 	if (streaming)
121 		return fimc_pipeline_call(&cap->ve, set_stream, 0);
122 	else
123 		return 0;
124 }
125 
fimc_stop_capture(struct fimc_dev * fimc,bool suspend)126 static int fimc_stop_capture(struct fimc_dev *fimc, bool suspend)
127 {
128 	unsigned long flags;
129 
130 	if (!fimc_capture_active(fimc))
131 		return 0;
132 
133 	spin_lock_irqsave(&fimc->slock, flags);
134 	set_bit(ST_CAPT_SHUT, &fimc->state);
135 	fimc_deactivate_capture(fimc);
136 	spin_unlock_irqrestore(&fimc->slock, flags);
137 
138 	wait_event_timeout(fimc->irq_queue,
139 			   !test_bit(ST_CAPT_SHUT, &fimc->state),
140 			   (2*HZ/10)); /* 200 ms */
141 
142 	return fimc_capture_state_cleanup(fimc, suspend);
143 }
144 
145 /**
146  * fimc_capture_config_update - apply the camera interface configuration
147  * @ctx: FIMC capture context
148  *
149  * To be called from within the interrupt handler with fimc.slock
150  * spinlock held. It updates the camera pixel crop, rotation and
151  * image flip in H/W.
152  */
fimc_capture_config_update(struct fimc_ctx * ctx)153 static int fimc_capture_config_update(struct fimc_ctx *ctx)
154 {
155 	struct fimc_dev *fimc = ctx->fimc_dev;
156 	int ret;
157 
158 	fimc_hw_set_camera_offset(fimc, &ctx->s_frame);
159 
160 	ret = fimc_set_scaler_info(ctx);
161 	if (ret)
162 		return ret;
163 
164 	fimc_hw_set_prescaler(ctx);
165 	fimc_hw_set_mainscaler(ctx);
166 	fimc_hw_set_target_format(ctx);
167 	fimc_hw_set_rotation(ctx);
168 	fimc_hw_set_effect(ctx);
169 	fimc_prepare_dma_offset(ctx, &ctx->d_frame);
170 	fimc_hw_set_out_dma(ctx);
171 	if (fimc->drv_data->alpha_color)
172 		fimc_hw_set_rgb_alpha(ctx);
173 
174 	clear_bit(ST_CAPT_APPLY_CFG, &fimc->state);
175 	return ret;
176 }
177 
fimc_capture_irq_handler(struct fimc_dev * fimc,int deq_buf)178 void fimc_capture_irq_handler(struct fimc_dev *fimc, int deq_buf)
179 {
180 	struct fimc_vid_cap *cap = &fimc->vid_cap;
181 	struct fimc_pipeline *p = to_fimc_pipeline(cap->ve.pipe);
182 	struct v4l2_subdev *csis = p->subdevs[IDX_CSIS];
183 	const struct fimc_frame *f = &cap->ctx->d_frame;
184 	struct fimc_vid_buffer *v_buf;
185 
186 	if (test_and_clear_bit(ST_CAPT_SHUT, &fimc->state)) {
187 		wake_up(&fimc->irq_queue);
188 		goto done;
189 	}
190 
191 	if (!list_empty(&cap->active_buf_q) &&
192 	    test_bit(ST_CAPT_RUN, &fimc->state) && deq_buf) {
193 		v_buf = fimc_active_queue_pop(cap);
194 
195 		v_buf->vb.vb2_buf.timestamp = ktime_get_ns();
196 		v_buf->vb.sequence = cap->frame_count++;
197 
198 		vb2_buffer_done(&v_buf->vb.vb2_buf, VB2_BUF_STATE_DONE);
199 	}
200 
201 	if (!list_empty(&cap->pending_buf_q)) {
202 
203 		v_buf = fimc_pending_queue_pop(cap);
204 		fimc_hw_set_output_addr(fimc, &v_buf->addr, cap->buf_index);
205 		v_buf->index = cap->buf_index;
206 
207 		/* Move the buffer to the capture active queue */
208 		fimc_active_queue_add(cap, v_buf);
209 
210 		dbg("next frame: %d, done frame: %d",
211 		    fimc_hw_get_frame_index(fimc), v_buf->index);
212 
213 		if (++cap->buf_index >= FIMC_MAX_OUT_BUFS)
214 			cap->buf_index = 0;
215 	}
216 	/*
217 	 * Set up a buffer at MIPI-CSIS if current image format
218 	 * requires the frame embedded data capture.
219 	 */
220 	if (f->fmt->mdataplanes && !list_empty(&cap->active_buf_q)) {
221 		unsigned int plane = ffs(f->fmt->mdataplanes) - 1;
222 		unsigned int size = f->payload[plane];
223 		s32 index = fimc_hw_get_frame_index(fimc);
224 		void *vaddr;
225 
226 		list_for_each_entry(v_buf, &cap->active_buf_q, list) {
227 			if (v_buf->index != index)
228 				continue;
229 			vaddr = vb2_plane_vaddr(&v_buf->vb.vb2_buf, plane);
230 			v4l2_subdev_call(csis, video, s_rx_buffer,
231 					 vaddr, &size);
232 			break;
233 		}
234 	}
235 
236 	if (cap->active_buf_cnt == 0) {
237 		if (deq_buf)
238 			clear_bit(ST_CAPT_RUN, &fimc->state);
239 
240 		if (++cap->buf_index >= FIMC_MAX_OUT_BUFS)
241 			cap->buf_index = 0;
242 	} else {
243 		set_bit(ST_CAPT_RUN, &fimc->state);
244 	}
245 
246 	if (test_bit(ST_CAPT_APPLY_CFG, &fimc->state))
247 		fimc_capture_config_update(cap->ctx);
248 done:
249 	if (cap->active_buf_cnt == 1) {
250 		fimc_deactivate_capture(fimc);
251 		clear_bit(ST_CAPT_STREAM, &fimc->state);
252 	}
253 
254 	dbg("frame: %d, active_buf_cnt: %d",
255 	    fimc_hw_get_frame_index(fimc), cap->active_buf_cnt);
256 }
257 
258 
start_streaming(struct vb2_queue * q,unsigned int count)259 static int start_streaming(struct vb2_queue *q, unsigned int count)
260 {
261 	struct fimc_ctx *ctx = q->drv_priv;
262 	struct fimc_dev *fimc = ctx->fimc_dev;
263 	struct fimc_vid_cap *vid_cap = &fimc->vid_cap;
264 	int min_bufs;
265 	int ret;
266 
267 	vid_cap->frame_count = 0;
268 
269 	ret = fimc_capture_hw_init(fimc);
270 	if (ret) {
271 		fimc_capture_state_cleanup(fimc, false);
272 		return ret;
273 	}
274 
275 	set_bit(ST_CAPT_PEND, &fimc->state);
276 
277 	min_bufs = fimc->vid_cap.reqbufs_count > 1 ? 2 : 1;
278 
279 	if (vid_cap->active_buf_cnt >= min_bufs &&
280 	    !test_and_set_bit(ST_CAPT_STREAM, &fimc->state)) {
281 		fimc_activate_capture(ctx);
282 
283 		if (!test_and_set_bit(ST_CAPT_ISP_STREAM, &fimc->state))
284 			return fimc_pipeline_call(&vid_cap->ve, set_stream, 1);
285 	}
286 
287 	return 0;
288 }
289 
stop_streaming(struct vb2_queue * q)290 static void stop_streaming(struct vb2_queue *q)
291 {
292 	struct fimc_ctx *ctx = q->drv_priv;
293 	struct fimc_dev *fimc = ctx->fimc_dev;
294 
295 	if (!fimc_capture_active(fimc))
296 		return;
297 
298 	fimc_stop_capture(fimc, false);
299 }
300 
fimc_capture_suspend(struct fimc_dev * fimc)301 int fimc_capture_suspend(struct fimc_dev *fimc)
302 {
303 	bool suspend = fimc_capture_busy(fimc);
304 
305 	int ret = fimc_stop_capture(fimc, suspend);
306 	if (ret)
307 		return ret;
308 	return fimc_pipeline_call(&fimc->vid_cap.ve, close);
309 }
310 
311 static void buffer_queue(struct vb2_buffer *vb);
312 
fimc_capture_resume(struct fimc_dev * fimc)313 int fimc_capture_resume(struct fimc_dev *fimc)
314 {
315 	struct fimc_vid_cap *vid_cap = &fimc->vid_cap;
316 	struct exynos_video_entity *ve = &vid_cap->ve;
317 	struct fimc_vid_buffer *buf;
318 	int i;
319 
320 	if (!test_and_clear_bit(ST_CAPT_SUSPENDED, &fimc->state))
321 		return 0;
322 
323 	INIT_LIST_HEAD(&fimc->vid_cap.active_buf_q);
324 	vid_cap->buf_index = 0;
325 	fimc_pipeline_call(ve, open, &ve->vdev.entity, false);
326 	fimc_capture_hw_init(fimc);
327 
328 	clear_bit(ST_CAPT_SUSPENDED, &fimc->state);
329 
330 	for (i = 0; i < vid_cap->reqbufs_count; i++) {
331 		if (list_empty(&vid_cap->pending_buf_q))
332 			break;
333 		buf = fimc_pending_queue_pop(vid_cap);
334 		buffer_queue(&buf->vb.vb2_buf);
335 	}
336 	return 0;
337 
338 }
339 
queue_setup(struct vb2_queue * vq,unsigned int * num_buffers,unsigned int * num_planes,unsigned int sizes[],struct device * alloc_devs[])340 static int queue_setup(struct vb2_queue *vq,
341 		       unsigned int *num_buffers, unsigned int *num_planes,
342 		       unsigned int sizes[], struct device *alloc_devs[])
343 {
344 	struct fimc_ctx *ctx = vq->drv_priv;
345 	const struct fimc_frame *frame = &ctx->d_frame;
346 	const struct fimc_fmt *fmt = frame->fmt;
347 	unsigned long wh = frame->f_width * frame->f_height;
348 	int i;
349 
350 	if (fmt == NULL)
351 		return -EINVAL;
352 
353 	if (*num_planes) {
354 		if (*num_planes != fmt->memplanes)
355 			return -EINVAL;
356 		for (i = 0; i < *num_planes; i++)
357 			if (sizes[i] < (wh * fmt->depth[i]) / 8)
358 				return -EINVAL;
359 		return 0;
360 	}
361 
362 	*num_planes = fmt->memplanes;
363 
364 	for (i = 0; i < fmt->memplanes; i++) {
365 		unsigned int size = (wh * fmt->depth[i]) / 8;
366 
367 		if (fimc_fmt_is_user_defined(fmt->color))
368 			sizes[i] = frame->payload[i];
369 		else
370 			sizes[i] = max_t(u32, size, frame->payload[i]);
371 	}
372 
373 	return 0;
374 }
375 
buffer_prepare(struct vb2_buffer * vb)376 static int buffer_prepare(struct vb2_buffer *vb)
377 {
378 	struct vb2_queue *vq = vb->vb2_queue;
379 	struct fimc_ctx *ctx = vq->drv_priv;
380 	int i;
381 
382 	if (ctx->d_frame.fmt == NULL)
383 		return -EINVAL;
384 
385 	for (i = 0; i < ctx->d_frame.fmt->memplanes; i++) {
386 		unsigned long size = ctx->d_frame.payload[i];
387 
388 		if (vb2_plane_size(vb, i) < size) {
389 			v4l2_err(&ctx->fimc_dev->vid_cap.ve.vdev,
390 				 "User buffer too small (%ld < %ld)\n",
391 				 vb2_plane_size(vb, i), size);
392 			return -EINVAL;
393 		}
394 		vb2_set_plane_payload(vb, i, size);
395 	}
396 
397 	return 0;
398 }
399 
buffer_queue(struct vb2_buffer * vb)400 static void buffer_queue(struct vb2_buffer *vb)
401 {
402 	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
403 	struct fimc_vid_buffer *buf
404 		= container_of(vbuf, struct fimc_vid_buffer, vb);
405 	struct fimc_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
406 	struct fimc_dev *fimc = ctx->fimc_dev;
407 	struct fimc_vid_cap *vid_cap = &fimc->vid_cap;
408 	struct exynos_video_entity *ve = &vid_cap->ve;
409 	unsigned long flags;
410 	int min_bufs;
411 
412 	spin_lock_irqsave(&fimc->slock, flags);
413 	fimc_prepare_addr(ctx, &buf->vb.vb2_buf, &ctx->d_frame, &buf->addr);
414 
415 	if (!test_bit(ST_CAPT_SUSPENDED, &fimc->state) &&
416 	    !test_bit(ST_CAPT_STREAM, &fimc->state) &&
417 	    vid_cap->active_buf_cnt < FIMC_MAX_OUT_BUFS) {
418 		/* Setup the buffer directly for processing. */
419 		int buf_id = (vid_cap->reqbufs_count == 1) ? -1 :
420 				vid_cap->buf_index;
421 
422 		fimc_hw_set_output_addr(fimc, &buf->addr, buf_id);
423 		buf->index = vid_cap->buf_index;
424 		fimc_active_queue_add(vid_cap, buf);
425 
426 		if (++vid_cap->buf_index >= FIMC_MAX_OUT_BUFS)
427 			vid_cap->buf_index = 0;
428 	} else {
429 		fimc_pending_queue_add(vid_cap, buf);
430 	}
431 
432 	min_bufs = vid_cap->reqbufs_count > 1 ? 2 : 1;
433 
434 
435 	if (vb2_is_streaming(&vid_cap->vbq) &&
436 	    vid_cap->active_buf_cnt >= min_bufs &&
437 	    !test_and_set_bit(ST_CAPT_STREAM, &fimc->state)) {
438 		int ret;
439 
440 		fimc_activate_capture(ctx);
441 		spin_unlock_irqrestore(&fimc->slock, flags);
442 
443 		if (test_and_set_bit(ST_CAPT_ISP_STREAM, &fimc->state))
444 			return;
445 
446 		ret = fimc_pipeline_call(ve, set_stream, 1);
447 		if (ret < 0)
448 			v4l2_err(&ve->vdev, "stream on failed: %d\n", ret);
449 		return;
450 	}
451 	spin_unlock_irqrestore(&fimc->slock, flags);
452 }
453 
454 static const struct vb2_ops fimc_capture_qops = {
455 	.queue_setup		= queue_setup,
456 	.buf_prepare		= buffer_prepare,
457 	.buf_queue		= buffer_queue,
458 	.wait_prepare		= vb2_ops_wait_prepare,
459 	.wait_finish		= vb2_ops_wait_finish,
460 	.start_streaming	= start_streaming,
461 	.stop_streaming		= stop_streaming,
462 };
463 
464 static int fimc_capture_set_default_format(struct fimc_dev *fimc);
465 
fimc_capture_open(struct file * file)466 static int fimc_capture_open(struct file *file)
467 {
468 	struct fimc_dev *fimc = video_drvdata(file);
469 	struct fimc_vid_cap *vc = &fimc->vid_cap;
470 	struct exynos_video_entity *ve = &vc->ve;
471 	int ret = -EBUSY;
472 
473 	dbg("pid: %d, state: 0x%lx", task_pid_nr(current), fimc->state);
474 
475 	mutex_lock(&fimc->lock);
476 
477 	if (fimc_m2m_active(fimc))
478 		goto unlock;
479 
480 	set_bit(ST_CAPT_BUSY, &fimc->state);
481 	ret = pm_runtime_resume_and_get(&fimc->pdev->dev);
482 	if (ret < 0)
483 		goto unlock;
484 
485 	ret = v4l2_fh_open(file);
486 	if (ret) {
487 		pm_runtime_put_sync(&fimc->pdev->dev);
488 		goto unlock;
489 	}
490 
491 	if (v4l2_fh_is_singular_file(file)) {
492 		fimc_md_graph_lock(ve);
493 
494 		ret = fimc_pipeline_call(ve, open, &ve->vdev.entity, true);
495 
496 		if (ret == 0)
497 			ve->vdev.entity.use_count++;
498 
499 		fimc_md_graph_unlock(ve);
500 
501 		if (ret == 0)
502 			ret = fimc_capture_set_default_format(fimc);
503 
504 		if (ret < 0) {
505 			clear_bit(ST_CAPT_BUSY, &fimc->state);
506 			pm_runtime_put_sync(&fimc->pdev->dev);
507 			v4l2_fh_release(file);
508 		}
509 	}
510 unlock:
511 	mutex_unlock(&fimc->lock);
512 	return ret;
513 }
514 
fimc_capture_release(struct file * file)515 static int fimc_capture_release(struct file *file)
516 {
517 	struct fimc_dev *fimc = video_drvdata(file);
518 	struct fimc_vid_cap *vc = &fimc->vid_cap;
519 	bool close = v4l2_fh_is_singular_file(file);
520 	int ret;
521 
522 	dbg("pid: %d, state: 0x%lx", task_pid_nr(current), fimc->state);
523 
524 	mutex_lock(&fimc->lock);
525 
526 	if (close && vc->streaming) {
527 		video_device_pipeline_stop(&vc->ve.vdev);
528 		vc->streaming = false;
529 	}
530 
531 	ret = _vb2_fop_release(file, NULL);
532 
533 	if (close) {
534 		clear_bit(ST_CAPT_BUSY, &fimc->state);
535 		fimc_pipeline_call(&vc->ve, close);
536 		clear_bit(ST_CAPT_SUSPENDED, &fimc->state);
537 
538 		fimc_md_graph_lock(&vc->ve);
539 		vc->ve.vdev.entity.use_count--;
540 		fimc_md_graph_unlock(&vc->ve);
541 	}
542 
543 	pm_runtime_put_sync(&fimc->pdev->dev);
544 	mutex_unlock(&fimc->lock);
545 
546 	return ret;
547 }
548 
549 static const struct v4l2_file_operations fimc_capture_fops = {
550 	.owner		= THIS_MODULE,
551 	.open		= fimc_capture_open,
552 	.release	= fimc_capture_release,
553 	.poll		= vb2_fop_poll,
554 	.unlocked_ioctl	= video_ioctl2,
555 	.mmap		= vb2_fop_mmap,
556 };
557 
558 /*
559  * Format and crop negotiation helpers
560  */
561 
fimc_capture_try_format(struct fimc_ctx * ctx,u32 * width,u32 * height,u32 * code,u32 * fourcc,int pad)562 static const struct fimc_fmt *fimc_capture_try_format(struct fimc_ctx *ctx,
563 						      u32 *width, u32 *height,
564 						      u32 *code, u32 *fourcc, int pad)
565 {
566 	bool rotation = ctx->rotation == 90 || ctx->rotation == 270;
567 	struct fimc_dev *fimc = ctx->fimc_dev;
568 	const struct fimc_variant *var = fimc->variant;
569 	const struct fimc_pix_limit *pl = var->pix_limit;
570 	const struct fimc_frame *dst = &ctx->d_frame;
571 	u32 depth, min_w, max_w, min_h, align_h = 3;
572 	const struct fimc_fmt *ffmt;
573 	u32 mask = FMT_FLAGS_CAM;
574 
575 	/* Conversion from/to JPEG or User Defined format is not supported */
576 	if (code && ctx->s_frame.fmt && pad == FIMC_SD_PAD_SOURCE &&
577 	    fimc_fmt_is_user_defined(ctx->s_frame.fmt->color))
578 		*code = ctx->s_frame.fmt->mbus_code;
579 
580 	if (fourcc && *fourcc != V4L2_PIX_FMT_JPEG && pad == FIMC_SD_PAD_SOURCE)
581 		mask |= FMT_FLAGS_M2M;
582 
583 	if (pad == FIMC_SD_PAD_SINK_FIFO)
584 		mask = FMT_FLAGS_WRITEBACK;
585 
586 	ffmt = fimc_find_format(fourcc, code, mask, 0);
587 	if (WARN_ON(!ffmt))
588 		return NULL;
589 
590 	if (code)
591 		*code = ffmt->mbus_code;
592 	if (fourcc)
593 		*fourcc = ffmt->fourcc;
594 
595 	if (pad != FIMC_SD_PAD_SOURCE) {
596 		max_w = fimc_fmt_is_user_defined(ffmt->color) ?
597 			pl->scaler_dis_w : pl->scaler_en_w;
598 		/* Apply the camera input interface pixel constraints */
599 		v4l_bound_align_image(width, max_t(u32, *width, 32), max_w, 4,
600 				      height, max_t(u32, *height, 32),
601 				      FIMC_CAMIF_MAX_HEIGHT,
602 				      fimc_fmt_is_user_defined(ffmt->color) ?
603 				      3 : 1,
604 				      0);
605 		return ffmt;
606 	}
607 	/* Can't scale or crop in transparent (JPEG) transfer mode */
608 	if (fimc_fmt_is_user_defined(ffmt->color)) {
609 		*width  = ctx->s_frame.f_width;
610 		*height = ctx->s_frame.f_height;
611 		return ffmt;
612 	}
613 	/* Apply the scaler and the output DMA constraints */
614 	max_w = rotation ? pl->out_rot_en_w : pl->out_rot_dis_w;
615 	if (ctx->state & FIMC_COMPOSE) {
616 		min_w = dst->offs_h + dst->width;
617 		min_h = dst->offs_v + dst->height;
618 	} else {
619 		min_w = var->min_out_pixsize;
620 		min_h = var->min_out_pixsize;
621 	}
622 	if (var->min_vsize_align == 1 && !rotation)
623 		align_h = fimc_fmt_is_rgb(ffmt->color) ? 0 : 1;
624 
625 	depth = fimc_get_format_depth(ffmt);
626 	v4l_bound_align_image(width, min_w, max_w,
627 			      ffs(var->min_out_pixsize) - 1,
628 			      height, min_h, FIMC_CAMIF_MAX_HEIGHT,
629 			      align_h,
630 			      64/(ALIGN(depth, 8)));
631 
632 	dbg("pad%d: code: 0x%x, %dx%d. dst fmt: %dx%d",
633 	    pad, code ? *code : 0, *width, *height,
634 	    dst->f_width, dst->f_height);
635 
636 	return ffmt;
637 }
638 
fimc_capture_try_selection(struct fimc_ctx * ctx,struct v4l2_rect * r,int target)639 static void fimc_capture_try_selection(struct fimc_ctx *ctx,
640 				       struct v4l2_rect *r,
641 				       int target)
642 {
643 	bool rotate = ctx->rotation == 90 || ctx->rotation == 270;
644 	struct fimc_dev *fimc = ctx->fimc_dev;
645 	const struct fimc_variant *var = fimc->variant;
646 	const struct fimc_pix_limit *pl = var->pix_limit;
647 	const struct fimc_frame *sink = &ctx->s_frame;
648 	u32 max_w, max_h, min_w = 0, min_h = 0, min_sz;
649 	u32 align_sz = 0, align_h = 4;
650 	u32 max_sc_h, max_sc_v;
651 
652 	/* In JPEG transparent transfer mode cropping is not supported */
653 	if (fimc_fmt_is_user_defined(ctx->d_frame.fmt->color)) {
654 		r->width  = sink->f_width;
655 		r->height = sink->f_height;
656 		r->left   = r->top = 0;
657 		return;
658 	}
659 	if (target == V4L2_SEL_TGT_COMPOSE) {
660 		u32 tmp_min_h = ffs(sink->width) - 3;
661 		u32 tmp_min_v = ffs(sink->height) - 1;
662 
663 		if (ctx->rotation != 90 && ctx->rotation != 270)
664 			align_h = 1;
665 		max_sc_h = min(SCALER_MAX_HRATIO, 1 << tmp_min_h);
666 		max_sc_v = min(SCALER_MAX_VRATIO, 1 << tmp_min_v);
667 		min_sz = var->min_out_pixsize;
668 	} else {
669 		u32 depth = fimc_get_format_depth(sink->fmt);
670 		align_sz = 64/ALIGN(depth, 8);
671 		min_sz = var->min_inp_pixsize;
672 		min_w = min_h = min_sz;
673 		max_sc_h = max_sc_v = 1;
674 	}
675 	/*
676 	 * For the compose rectangle the following constraints must be met:
677 	 * - it must fit in the sink pad format rectangle (f_width/f_height);
678 	 * - maximum downscaling ratio is 64;
679 	 * - maximum crop size depends if the rotator is used or not;
680 	 * - the sink pad format width/height must be 4 multiple of the
681 	 *   prescaler ratios determined by sink pad size and source pad crop,
682 	 *   the prescaler ratio is returned by fimc_get_scaler_factor().
683 	 */
684 	max_w = min_t(u32,
685 		      rotate ? pl->out_rot_en_w : pl->out_rot_dis_w,
686 		      rotate ? sink->f_height : sink->f_width);
687 	max_h = min_t(u32, FIMC_CAMIF_MAX_HEIGHT, sink->f_height);
688 
689 	if (target == V4L2_SEL_TGT_COMPOSE) {
690 		min_w = min_t(u32, max_w, sink->f_width / max_sc_h);
691 		min_h = min_t(u32, max_h, sink->f_height / max_sc_v);
692 		if (rotate) {
693 			swap(max_sc_h, max_sc_v);
694 			swap(min_w, min_h);
695 		}
696 	}
697 	v4l_bound_align_image(&r->width, min_w, max_w, ffs(min_sz) - 1,
698 			      &r->height, min_h, max_h, align_h,
699 			      align_sz);
700 	/* Adjust left/top if crop/compose rectangle is out of bounds */
701 	r->left = clamp_t(u32, r->left, 0, sink->f_width - r->width);
702 	r->top  = clamp_t(u32, r->top, 0, sink->f_height - r->height);
703 	r->left = round_down(r->left, var->hor_offs_align);
704 
705 	dbg("target %#x: (%d,%d)/%dx%d, sink fmt: %dx%d",
706 	    target, r->left, r->top, r->width, r->height,
707 	    sink->f_width, sink->f_height);
708 }
709 
710 /*
711  * The video node ioctl operations
712  */
fimc_cap_querycap(struct file * file,void * priv,struct v4l2_capability * cap)713 static int fimc_cap_querycap(struct file *file, void *priv,
714 					struct v4l2_capability *cap)
715 {
716 	struct fimc_dev *fimc = video_drvdata(file);
717 
718 	__fimc_vidioc_querycap(&fimc->pdev->dev, cap);
719 	return 0;
720 }
721 
fimc_cap_enum_fmt(struct file * file,void * priv,struct v4l2_fmtdesc * f)722 static int fimc_cap_enum_fmt(struct file *file, void *priv,
723 			     struct v4l2_fmtdesc *f)
724 {
725 	const struct fimc_fmt *fmt;
726 
727 	fmt = fimc_find_format(NULL, NULL, FMT_FLAGS_CAM | FMT_FLAGS_M2M,
728 			       f->index);
729 	if (!fmt)
730 		return -EINVAL;
731 	f->pixelformat = fmt->fourcc;
732 	return 0;
733 }
734 
fimc_pipeline_get_head(struct media_entity * me)735 static struct media_entity *fimc_pipeline_get_head(struct media_entity *me)
736 {
737 	struct media_pad *pad = &me->pads[0];
738 
739 	while (!(pad->flags & MEDIA_PAD_FL_SOURCE)) {
740 		pad = media_pad_remote_pad_first(pad);
741 		if (!pad)
742 			break;
743 		me = pad->entity;
744 		pad = &me->pads[0];
745 	}
746 
747 	return me;
748 }
749 
750 /**
751  * fimc_pipeline_try_format - negotiate and/or set formats at pipeline
752  *                            elements
753  * @ctx: FIMC capture context
754  * @tfmt: media bus format to try/set on subdevs
755  * @fmt_id: fimc pixel format id corresponding to returned @tfmt (output)
756  * @set: true to set format on subdevs, false to try only
757  */
fimc_pipeline_try_format(struct fimc_ctx * ctx,struct v4l2_mbus_framefmt * tfmt,const struct fimc_fmt ** fmt_id,bool set)758 static int fimc_pipeline_try_format(struct fimc_ctx *ctx,
759 				    struct v4l2_mbus_framefmt *tfmt,
760 				    const struct fimc_fmt **fmt_id,
761 				    bool set)
762 {
763 	struct fimc_dev *fimc = ctx->fimc_dev;
764 	struct fimc_pipeline *p = to_fimc_pipeline(fimc->vid_cap.ve.pipe);
765 	struct v4l2_subdev *sd = p->subdevs[IDX_SENSOR];
766 	struct v4l2_subdev_format sfmt = {
767 		.which = set ? V4L2_SUBDEV_FORMAT_ACTIVE
768 		       : V4L2_SUBDEV_FORMAT_TRY,
769 	};
770 	struct v4l2_mbus_framefmt *mf = &sfmt.format;
771 	const struct fimc_fmt *ffmt;
772 	struct media_entity *me;
773 	struct media_pad *pad;
774 	int ret, i = 1;
775 	u32 fcc;
776 
777 	if (WARN_ON(!sd || !tfmt))
778 		return -EINVAL;
779 
780 	sfmt.format = *tfmt;
781 
782 	me = fimc_pipeline_get_head(&sd->entity);
783 
784 	while (1) {
785 		ffmt = fimc_find_format(NULL, mf->code != 0 ? &mf->code : NULL,
786 					FMT_FLAGS_CAM, i++);
787 		if (ffmt == NULL) {
788 			/*
789 			 * Notify user-space if common pixel code for
790 			 * host and sensor does not exist.
791 			 */
792 			return -EINVAL;
793 		}
794 		mf->code = tfmt->code = ffmt->mbus_code;
795 
796 		/* set format on all pipeline subdevs */
797 		while (me != &fimc->vid_cap.subdev.entity) {
798 			sd = media_entity_to_v4l2_subdev(me);
799 
800 			sfmt.pad = 0;
801 			ret = v4l2_subdev_call(sd, pad, set_fmt, NULL, &sfmt);
802 			if (ret)
803 				return ret;
804 
805 			if (me->pads[0].flags & MEDIA_PAD_FL_SINK) {
806 				sfmt.pad = me->num_pads - 1;
807 				mf->code = tfmt->code;
808 				ret = v4l2_subdev_call(sd, pad, set_fmt, NULL,
809 									&sfmt);
810 				if (ret)
811 					return ret;
812 			}
813 
814 			pad = media_pad_remote_pad_first(&me->pads[sfmt.pad]);
815 			if (!pad)
816 				return -EINVAL;
817 			me = pad->entity;
818 		}
819 
820 		if (mf->code != tfmt->code)
821 			continue;
822 
823 		fcc = ffmt->fourcc;
824 		tfmt->width  = mf->width;
825 		tfmt->height = mf->height;
826 		ffmt = fimc_capture_try_format(ctx, &tfmt->width, &tfmt->height,
827 					NULL, &fcc, FIMC_SD_PAD_SINK_CAM);
828 		ffmt = fimc_capture_try_format(ctx, &tfmt->width, &tfmt->height,
829 					NULL, &fcc, FIMC_SD_PAD_SOURCE);
830 		if (ffmt && ffmt->mbus_code)
831 			mf->code = ffmt->mbus_code;
832 		if (mf->width != tfmt->width || mf->height != tfmt->height)
833 			continue;
834 		tfmt->code = mf->code;
835 		break;
836 	}
837 
838 	if (fmt_id && ffmt)
839 		*fmt_id = ffmt;
840 	*tfmt = *mf;
841 
842 	return 0;
843 }
844 
845 /**
846  * fimc_get_sensor_frame_desc - query the sensor for media bus frame parameters
847  * @sensor: pointer to the sensor subdev
848  * @plane_fmt: provides plane sizes corresponding to the frame layout entries
849  * @num_planes: number of planes
850  * @try: true to set the frame parameters, false to query only
851  *
852  * This function is used by this driver only for compressed/blob data formats.
853  */
fimc_get_sensor_frame_desc(struct v4l2_subdev * sensor,struct v4l2_plane_pix_format * plane_fmt,unsigned int num_planes,bool try)854 static int fimc_get_sensor_frame_desc(struct v4l2_subdev *sensor,
855 				      struct v4l2_plane_pix_format *plane_fmt,
856 				      unsigned int num_planes, bool try)
857 {
858 	struct v4l2_mbus_frame_desc fd = { };
859 	int i, ret;
860 	int pad;
861 
862 	for (i = 0; i < num_planes; i++)
863 		fd.entry[i].length = plane_fmt[i].sizeimage;
864 
865 	pad = sensor->entity.num_pads - 1;
866 	if (try)
867 		ret = v4l2_subdev_call(sensor, pad, set_frame_desc, pad, &fd);
868 	else
869 		ret = v4l2_subdev_call(sensor, pad, get_frame_desc, pad, &fd);
870 
871 	if (ret < 0)
872 		return ret;
873 
874 	if (num_planes != fd.num_entries)
875 		return -EINVAL;
876 
877 	for (i = 0; i < num_planes; i++)
878 		plane_fmt[i].sizeimage = fd.entry[i].length;
879 
880 	if (fd.entry[0].length > FIMC_MAX_JPEG_BUF_SIZE) {
881 		v4l2_err(sensor->v4l2_dev,  "Unsupported buffer size: %u\n",
882 			 fd.entry[0].length);
883 
884 		return -EINVAL;
885 	}
886 
887 	return 0;
888 }
889 
fimc_cap_g_fmt_mplane(struct file * file,void * fh,struct v4l2_format * f)890 static int fimc_cap_g_fmt_mplane(struct file *file, void *fh,
891 				 struct v4l2_format *f)
892 {
893 	struct fimc_dev *fimc = video_drvdata(file);
894 
895 	__fimc_get_format(&fimc->vid_cap.ctx->d_frame, f);
896 	return 0;
897 }
898 
899 /*
900  * Try or set format on the fimc.X.capture video node and additionally
901  * on the whole pipeline if @try is false.
902  * Locking: the caller must _not_ hold the graph mutex.
903  */
__video_try_or_set_format(struct fimc_dev * fimc,struct v4l2_format * f,bool try,const struct fimc_fmt ** inp_fmt,const struct fimc_fmt ** out_fmt)904 static int __video_try_or_set_format(struct fimc_dev *fimc,
905 				     struct v4l2_format *f, bool try,
906 				     const struct fimc_fmt **inp_fmt,
907 				     const struct fimc_fmt **out_fmt)
908 {
909 	struct v4l2_pix_format_mplane *pix = &f->fmt.pix_mp;
910 	struct fimc_vid_cap *vc = &fimc->vid_cap;
911 	struct exynos_video_entity *ve = &vc->ve;
912 	struct fimc_ctx *ctx = vc->ctx;
913 	unsigned int width = 0, height = 0;
914 	int ret = 0;
915 
916 	/* Pre-configure format at the camera input interface, for JPEG only */
917 	if (fimc_jpeg_fourcc(pix->pixelformat)) {
918 		fimc_capture_try_format(ctx, &pix->width, &pix->height,
919 					NULL, &pix->pixelformat,
920 					FIMC_SD_PAD_SINK_CAM);
921 		if (try) {
922 			width = pix->width;
923 			height = pix->height;
924 		} else {
925 			ctx->s_frame.f_width = pix->width;
926 			ctx->s_frame.f_height = pix->height;
927 		}
928 	}
929 
930 	/* Try the format at the scaler and the DMA output */
931 	*out_fmt = fimc_capture_try_format(ctx, &pix->width, &pix->height,
932 					  NULL, &pix->pixelformat,
933 					  FIMC_SD_PAD_SOURCE);
934 	if (*out_fmt == NULL)
935 		return -EINVAL;
936 
937 	/* Restore image width/height for JPEG (no resizing supported). */
938 	if (try && fimc_jpeg_fourcc(pix->pixelformat)) {
939 		pix->width = width;
940 		pix->height = height;
941 	}
942 
943 	/* Try to match format at the host and the sensor */
944 	if (!vc->user_subdev_api) {
945 		struct v4l2_mbus_framefmt mbus_fmt;
946 		struct v4l2_mbus_framefmt *mf;
947 
948 		mf = try ? &mbus_fmt : &fimc->vid_cap.ci_fmt;
949 
950 		mf->code = (*out_fmt)->mbus_code;
951 		mf->width = pix->width;
952 		mf->height = pix->height;
953 
954 		fimc_md_graph_lock(ve);
955 		ret = fimc_pipeline_try_format(ctx, mf, inp_fmt, try);
956 		fimc_md_graph_unlock(ve);
957 
958 		if (ret < 0)
959 			return ret;
960 
961 		pix->width = mf->width;
962 		pix->height = mf->height;
963 	}
964 
965 	fimc_adjust_mplane_format(*out_fmt, pix->width, pix->height, pix);
966 
967 	if ((*out_fmt)->flags & FMT_FLAGS_COMPRESSED) {
968 		struct v4l2_subdev *sensor;
969 
970 		fimc_md_graph_lock(ve);
971 
972 		sensor = __fimc_md_get_subdev(ve->pipe, IDX_SENSOR);
973 		if (sensor)
974 			fimc_get_sensor_frame_desc(sensor, pix->plane_fmt,
975 						   (*out_fmt)->memplanes, try);
976 		else
977 			ret = -EPIPE;
978 
979 		fimc_md_graph_unlock(ve);
980 	}
981 
982 	return ret;
983 }
984 
fimc_cap_try_fmt_mplane(struct file * file,void * fh,struct v4l2_format * f)985 static int fimc_cap_try_fmt_mplane(struct file *file, void *fh,
986 				   struct v4l2_format *f)
987 {
988 	struct fimc_dev *fimc = video_drvdata(file);
989 	const struct fimc_fmt *out_fmt = NULL, *inp_fmt = NULL;
990 
991 	return __video_try_or_set_format(fimc, f, true, &inp_fmt, &out_fmt);
992 }
993 
fimc_capture_mark_jpeg_xfer(struct fimc_ctx * ctx,enum fimc_color_fmt color)994 static void fimc_capture_mark_jpeg_xfer(struct fimc_ctx *ctx,
995 					enum fimc_color_fmt color)
996 {
997 	bool jpeg = fimc_fmt_is_user_defined(color);
998 
999 	ctx->scaler.enabled = !jpeg;
1000 	fimc_ctrls_activate(ctx, !jpeg);
1001 
1002 	if (jpeg)
1003 		set_bit(ST_CAPT_JPEG, &ctx->fimc_dev->state);
1004 	else
1005 		clear_bit(ST_CAPT_JPEG, &ctx->fimc_dev->state);
1006 }
1007 
__fimc_capture_set_format(struct fimc_dev * fimc,struct v4l2_format * f)1008 static int __fimc_capture_set_format(struct fimc_dev *fimc,
1009 				     struct v4l2_format *f)
1010 {
1011 	struct fimc_vid_cap *vc = &fimc->vid_cap;
1012 	struct fimc_ctx *ctx = vc->ctx;
1013 	const struct v4l2_pix_format_mplane *pix = &f->fmt.pix_mp;
1014 	struct fimc_frame *ff = &ctx->d_frame;
1015 	const struct fimc_fmt *inp_fmt = NULL;
1016 	int ret, i;
1017 
1018 	if (vb2_is_busy(&fimc->vid_cap.vbq))
1019 		return -EBUSY;
1020 
1021 	ret = __video_try_or_set_format(fimc, f, false, &inp_fmt, &ff->fmt);
1022 	if (ret < 0)
1023 		return ret;
1024 
1025 	/* Update RGB Alpha control state and value range */
1026 	fimc_alpha_ctrl_update(ctx);
1027 
1028 	for (i = 0; i < ff->fmt->memplanes; i++) {
1029 		ff->bytesperline[i] = pix->plane_fmt[i].bytesperline;
1030 		ff->payload[i] = pix->plane_fmt[i].sizeimage;
1031 	}
1032 
1033 	set_frame_bounds(ff, pix->width, pix->height);
1034 	/* Reset the composition rectangle if not yet configured */
1035 	if (!(ctx->state & FIMC_COMPOSE))
1036 		set_frame_crop(ff, 0, 0, pix->width, pix->height);
1037 
1038 	fimc_capture_mark_jpeg_xfer(ctx, ff->fmt->color);
1039 
1040 	/* Reset cropping and set format at the camera interface input */
1041 	if (!vc->user_subdev_api) {
1042 		ctx->s_frame.fmt = inp_fmt;
1043 		set_frame_bounds(&ctx->s_frame, pix->width, pix->height);
1044 		set_frame_crop(&ctx->s_frame, 0, 0, pix->width, pix->height);
1045 	}
1046 
1047 	return ret;
1048 }
1049 
fimc_cap_s_fmt_mplane(struct file * file,void * priv,struct v4l2_format * f)1050 static int fimc_cap_s_fmt_mplane(struct file *file, void *priv,
1051 				 struct v4l2_format *f)
1052 {
1053 	struct fimc_dev *fimc = video_drvdata(file);
1054 
1055 	return __fimc_capture_set_format(fimc, f);
1056 }
1057 
fimc_cap_enum_input(struct file * file,void * priv,struct v4l2_input * i)1058 static int fimc_cap_enum_input(struct file *file, void *priv,
1059 			       struct v4l2_input *i)
1060 {
1061 	struct fimc_dev *fimc = video_drvdata(file);
1062 	struct exynos_video_entity *ve = &fimc->vid_cap.ve;
1063 	struct v4l2_subdev *sd;
1064 
1065 	if (i->index != 0)
1066 		return -EINVAL;
1067 
1068 	i->type = V4L2_INPUT_TYPE_CAMERA;
1069 	fimc_md_graph_lock(ve);
1070 	sd = __fimc_md_get_subdev(ve->pipe, IDX_SENSOR);
1071 	fimc_md_graph_unlock(ve);
1072 
1073 	if (sd)
1074 		strscpy(i->name, sd->name, sizeof(i->name));
1075 
1076 	return 0;
1077 }
1078 
fimc_cap_s_input(struct file * file,void * priv,unsigned int i)1079 static int fimc_cap_s_input(struct file *file, void *priv, unsigned int i)
1080 {
1081 	return i == 0 ? i : -EINVAL;
1082 }
1083 
fimc_cap_g_input(struct file * file,void * priv,unsigned int * i)1084 static int fimc_cap_g_input(struct file *file, void *priv, unsigned int *i)
1085 {
1086 	*i = 0;
1087 	return 0;
1088 }
1089 
1090 /**
1091  * fimc_pipeline_validate - check for formats inconsistencies
1092  *                          between source and sink pad of each link
1093  * @fimc:	the FIMC device this context applies to
1094  *
1095  * Return 0 if all formats match or -EPIPE otherwise.
1096  */
fimc_pipeline_validate(struct fimc_dev * fimc)1097 static int fimc_pipeline_validate(struct fimc_dev *fimc)
1098 {
1099 	struct v4l2_subdev_format sink_fmt = {
1100 		.which = V4L2_SUBDEV_FORMAT_ACTIVE,
1101 	};
1102 	struct v4l2_subdev_format src_fmt = {
1103 		.which = V4L2_SUBDEV_FORMAT_ACTIVE,
1104 	};
1105 	struct fimc_vid_cap *vc = &fimc->vid_cap;
1106 	struct v4l2_subdev *sd = &vc->subdev;
1107 	struct fimc_pipeline *p = to_fimc_pipeline(vc->ve.pipe);
1108 	struct media_pad *sink_pad, *src_pad;
1109 	int i, ret;
1110 
1111 	while (1) {
1112 		/*
1113 		 * Find current entity sink pad and any remote sink pad linked
1114 		 * to it. We stop if there is no sink pad in current entity or
1115 		 * it is not linked to any other remote entity.
1116 		 */
1117 		src_pad = NULL;
1118 
1119 		for (i = 0; i < sd->entity.num_pads; i++) {
1120 			struct media_pad *p = &sd->entity.pads[i];
1121 
1122 			if (p->flags & MEDIA_PAD_FL_SINK) {
1123 				sink_pad = p;
1124 				src_pad = media_pad_remote_pad_first(sink_pad);
1125 				if (src_pad)
1126 					break;
1127 			}
1128 		}
1129 
1130 		if (!src_pad || !is_media_entity_v4l2_subdev(src_pad->entity))
1131 			break;
1132 
1133 		/* Don't call FIMC subdev operation to avoid nested locking */
1134 		if (sd == &vc->subdev) {
1135 			const struct fimc_frame *ff = &vc->ctx->s_frame;
1136 			sink_fmt.format.width = ff->f_width;
1137 			sink_fmt.format.height = ff->f_height;
1138 			sink_fmt.format.code = ff->fmt ? ff->fmt->mbus_code : 0;
1139 		} else {
1140 			sink_fmt.pad = sink_pad->index;
1141 			ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &sink_fmt);
1142 			if (ret < 0 && ret != -ENOIOCTLCMD)
1143 				return -EPIPE;
1144 		}
1145 
1146 		/* Retrieve format at the source pad */
1147 		sd = media_entity_to_v4l2_subdev(src_pad->entity);
1148 		src_fmt.pad = src_pad->index;
1149 		ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &src_fmt);
1150 		if (ret < 0 && ret != -ENOIOCTLCMD)
1151 			return -EPIPE;
1152 
1153 		if (src_fmt.format.width != sink_fmt.format.width ||
1154 		    src_fmt.format.height != sink_fmt.format.height ||
1155 		    src_fmt.format.code != sink_fmt.format.code)
1156 			return -EPIPE;
1157 
1158 		if (sd == p->subdevs[IDX_SENSOR] &&
1159 		    fimc_user_defined_mbus_fmt(src_fmt.format.code)) {
1160 			struct v4l2_plane_pix_format plane_fmt[FIMC_MAX_PLANES];
1161 			const struct fimc_frame *frame = &vc->ctx->d_frame;
1162 			unsigned int i;
1163 
1164 			ret = fimc_get_sensor_frame_desc(sd, plane_fmt,
1165 							 frame->fmt->memplanes,
1166 							 false);
1167 			if (ret < 0)
1168 				return -EPIPE;
1169 
1170 			for (i = 0; i < frame->fmt->memplanes; i++)
1171 				if (frame->payload[i] < plane_fmt[i].sizeimage)
1172 					return -EPIPE;
1173 		}
1174 	}
1175 	return 0;
1176 }
1177 
fimc_cap_streamon(struct file * file,void * priv,enum v4l2_buf_type type)1178 static int fimc_cap_streamon(struct file *file, void *priv,
1179 			     enum v4l2_buf_type type)
1180 {
1181 	struct fimc_dev *fimc = video_drvdata(file);
1182 	struct fimc_vid_cap *vc = &fimc->vid_cap;
1183 	struct fimc_source_info *si = NULL;
1184 	struct v4l2_subdev *sd;
1185 	int ret;
1186 
1187 	if (fimc_capture_active(fimc))
1188 		return -EBUSY;
1189 
1190 	ret = video_device_pipeline_start(&vc->ve.vdev, &vc->ve.pipe->mp);
1191 	if (ret < 0)
1192 		return ret;
1193 
1194 	sd = __fimc_md_get_subdev(vc->ve.pipe, IDX_SENSOR);
1195 	if (sd)
1196 		si = v4l2_get_subdev_hostdata(sd);
1197 
1198 	if (si == NULL) {
1199 		ret = -EPIPE;
1200 		goto err_p_stop;
1201 	}
1202 	/*
1203 	 * Save configuration data related to currently attached image
1204 	 * sensor or other data source, e.g. FIMC-IS.
1205 	 */
1206 	vc->source_config = *si;
1207 
1208 	if (vc->input == GRP_ID_FIMC_IS)
1209 		vc->source_config.fimc_bus_type = FIMC_BUS_TYPE_ISP_WRITEBACK;
1210 
1211 	if (vc->user_subdev_api) {
1212 		ret = fimc_pipeline_validate(fimc);
1213 		if (ret < 0)
1214 			goto err_p_stop;
1215 	}
1216 
1217 	ret = vb2_ioctl_streamon(file, priv, type);
1218 	if (!ret) {
1219 		vc->streaming = true;
1220 		return ret;
1221 	}
1222 
1223 err_p_stop:
1224 	video_device_pipeline_stop(&vc->ve.vdev);
1225 	return ret;
1226 }
1227 
fimc_cap_streamoff(struct file * file,void * priv,enum v4l2_buf_type type)1228 static int fimc_cap_streamoff(struct file *file, void *priv,
1229 			    enum v4l2_buf_type type)
1230 {
1231 	struct fimc_dev *fimc = video_drvdata(file);
1232 	struct fimc_vid_cap *vc = &fimc->vid_cap;
1233 	int ret;
1234 
1235 	ret = vb2_ioctl_streamoff(file, priv, type);
1236 	if (ret < 0)
1237 		return ret;
1238 
1239 	if (vc->streaming) {
1240 		video_device_pipeline_stop(&vc->ve.vdev);
1241 		vc->streaming = false;
1242 	}
1243 
1244 	return 0;
1245 }
1246 
fimc_cap_reqbufs(struct file * file,void * priv,struct v4l2_requestbuffers * reqbufs)1247 static int fimc_cap_reqbufs(struct file *file, void *priv,
1248 			    struct v4l2_requestbuffers *reqbufs)
1249 {
1250 	struct fimc_dev *fimc = video_drvdata(file);
1251 	int ret;
1252 
1253 	ret = vb2_ioctl_reqbufs(file, priv, reqbufs);
1254 
1255 	if (!ret)
1256 		fimc->vid_cap.reqbufs_count = reqbufs->count;
1257 
1258 	return ret;
1259 }
1260 
fimc_cap_g_selection(struct file * file,void * fh,struct v4l2_selection * s)1261 static int fimc_cap_g_selection(struct file *file, void *fh,
1262 				struct v4l2_selection *s)
1263 {
1264 	struct fimc_dev *fimc = video_drvdata(file);
1265 	struct fimc_ctx *ctx = fimc->vid_cap.ctx;
1266 	const struct fimc_frame *f = &ctx->s_frame;
1267 
1268 	if (s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1269 		return -EINVAL;
1270 
1271 	switch (s->target) {
1272 	case V4L2_SEL_TGT_COMPOSE_DEFAULT:
1273 	case V4L2_SEL_TGT_COMPOSE_BOUNDS:
1274 		f = &ctx->d_frame;
1275 		fallthrough;
1276 	case V4L2_SEL_TGT_CROP_BOUNDS:
1277 	case V4L2_SEL_TGT_CROP_DEFAULT:
1278 		s->r.left = 0;
1279 		s->r.top = 0;
1280 		s->r.width = f->o_width;
1281 		s->r.height = f->o_height;
1282 		return 0;
1283 
1284 	case V4L2_SEL_TGT_COMPOSE:
1285 		f = &ctx->d_frame;
1286 		fallthrough;
1287 	case V4L2_SEL_TGT_CROP:
1288 		s->r.left = f->offs_h;
1289 		s->r.top = f->offs_v;
1290 		s->r.width = f->width;
1291 		s->r.height = f->height;
1292 		return 0;
1293 	}
1294 
1295 	return -EINVAL;
1296 }
1297 
fimc_cap_s_selection(struct file * file,void * fh,struct v4l2_selection * s)1298 static int fimc_cap_s_selection(struct file *file, void *fh,
1299 				struct v4l2_selection *s)
1300 {
1301 	struct fimc_dev *fimc = video_drvdata(file);
1302 	struct fimc_ctx *ctx = fimc->vid_cap.ctx;
1303 	struct v4l2_rect rect = s->r;
1304 	struct fimc_frame *f;
1305 	unsigned long flags;
1306 
1307 	if (s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1308 		return -EINVAL;
1309 
1310 	if (s->target == V4L2_SEL_TGT_COMPOSE)
1311 		f = &ctx->d_frame;
1312 	else if (s->target == V4L2_SEL_TGT_CROP)
1313 		f = &ctx->s_frame;
1314 	else
1315 		return -EINVAL;
1316 
1317 	fimc_capture_try_selection(ctx, &rect, s->target);
1318 
1319 	if (s->flags & V4L2_SEL_FLAG_LE &&
1320 	    !v4l2_rect_enclosed(&rect, &s->r))
1321 		return -ERANGE;
1322 
1323 	if (s->flags & V4L2_SEL_FLAG_GE &&
1324 	    !v4l2_rect_enclosed(&s->r, &rect))
1325 		return -ERANGE;
1326 
1327 	s->r = rect;
1328 	spin_lock_irqsave(&fimc->slock, flags);
1329 	set_frame_crop(f, s->r.left, s->r.top, s->r.width,
1330 		       s->r.height);
1331 	spin_unlock_irqrestore(&fimc->slock, flags);
1332 
1333 	set_bit(ST_CAPT_APPLY_CFG, &fimc->state);
1334 	return 0;
1335 }
1336 
1337 static const struct v4l2_ioctl_ops fimc_capture_ioctl_ops = {
1338 	.vidioc_querycap		= fimc_cap_querycap,
1339 
1340 	.vidioc_enum_fmt_vid_cap	= fimc_cap_enum_fmt,
1341 	.vidioc_try_fmt_vid_cap_mplane	= fimc_cap_try_fmt_mplane,
1342 	.vidioc_s_fmt_vid_cap_mplane	= fimc_cap_s_fmt_mplane,
1343 	.vidioc_g_fmt_vid_cap_mplane	= fimc_cap_g_fmt_mplane,
1344 
1345 	.vidioc_reqbufs			= fimc_cap_reqbufs,
1346 	.vidioc_querybuf		= vb2_ioctl_querybuf,
1347 	.vidioc_qbuf			= vb2_ioctl_qbuf,
1348 	.vidioc_dqbuf			= vb2_ioctl_dqbuf,
1349 	.vidioc_expbuf			= vb2_ioctl_expbuf,
1350 	.vidioc_prepare_buf		= vb2_ioctl_prepare_buf,
1351 	.vidioc_create_bufs		= vb2_ioctl_create_bufs,
1352 
1353 	.vidioc_streamon		= fimc_cap_streamon,
1354 	.vidioc_streamoff		= fimc_cap_streamoff,
1355 
1356 	.vidioc_g_selection		= fimc_cap_g_selection,
1357 	.vidioc_s_selection		= fimc_cap_s_selection,
1358 
1359 	.vidioc_enum_input		= fimc_cap_enum_input,
1360 	.vidioc_s_input			= fimc_cap_s_input,
1361 	.vidioc_g_input			= fimc_cap_g_input,
1362 };
1363 
1364 /* Capture subdev media entity operations */
fimc_link_setup(struct media_entity * entity,const struct media_pad * local,const struct media_pad * remote,u32 flags)1365 static int fimc_link_setup(struct media_entity *entity,
1366 			   const struct media_pad *local,
1367 			   const struct media_pad *remote, u32 flags)
1368 {
1369 	struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity);
1370 	struct fimc_dev *fimc = v4l2_get_subdevdata(sd);
1371 	struct fimc_vid_cap *vc = &fimc->vid_cap;
1372 	struct v4l2_subdev *sensor;
1373 
1374 	if (!is_media_entity_v4l2_subdev(remote->entity))
1375 		return -EINVAL;
1376 
1377 	if (WARN_ON(fimc == NULL))
1378 		return 0;
1379 
1380 	dbg("%s --> %s, flags: 0x%x. input: 0x%x",
1381 	    local->entity->name, remote->entity->name, flags,
1382 	    fimc->vid_cap.input);
1383 
1384 	if (!(flags & MEDIA_LNK_FL_ENABLED)) {
1385 		fimc->vid_cap.input = 0;
1386 		return 0;
1387 	}
1388 
1389 	if (vc->input != 0)
1390 		return -EBUSY;
1391 
1392 	vc->input = sd->grp_id;
1393 
1394 	if (vc->user_subdev_api)
1395 		return 0;
1396 
1397 	/* Inherit V4L2 controls from the image sensor subdev. */
1398 	sensor = fimc_find_remote_sensor(&vc->subdev.entity);
1399 	if (sensor == NULL)
1400 		return 0;
1401 
1402 	return v4l2_ctrl_add_handler(&vc->ctx->ctrls.handler,
1403 				     sensor->ctrl_handler, NULL, true);
1404 }
1405 
1406 static const struct media_entity_operations fimc_sd_media_ops = {
1407 	.link_setup = fimc_link_setup,
1408 };
1409 
1410 /**
1411  * fimc_sensor_notify - v4l2_device notification from a sensor subdev
1412  * @sd: pointer to a subdev generating the notification
1413  * @notification: the notification type, must be S5P_FIMC_TX_END_NOTIFY
1414  * @arg: pointer to an u32 type integer that stores the frame payload value
1415  *
1416  * The End Of Frame notification sent by sensor subdev in its still capture
1417  * mode. If there is only a single VSYNC generated by the sensor at the
1418  * beginning of a frame transmission, FIMC does not issue the LastIrq
1419  * (end of frame) interrupt. And this notification is used to complete the
1420  * frame capture and returning a buffer to user-space. Subdev drivers should
1421  * call this notification from their last 'End of frame capture' interrupt.
1422  */
fimc_sensor_notify(struct v4l2_subdev * sd,unsigned int notification,void * arg)1423 void fimc_sensor_notify(struct v4l2_subdev *sd, unsigned int notification,
1424 			void *arg)
1425 {
1426 	struct fimc_source_info	*si;
1427 	struct fimc_vid_buffer *buf;
1428 	struct fimc_md *fmd;
1429 	struct fimc_dev *fimc;
1430 	unsigned long flags;
1431 
1432 	if (sd == NULL)
1433 		return;
1434 
1435 	si = v4l2_get_subdev_hostdata(sd);
1436 	fmd = entity_to_fimc_mdev(&sd->entity);
1437 
1438 	spin_lock_irqsave(&fmd->slock, flags);
1439 
1440 	fimc = si ? source_to_sensor_info(si)->host : NULL;
1441 
1442 	if (fimc && arg && notification == S5P_FIMC_TX_END_NOTIFY &&
1443 	    test_bit(ST_CAPT_PEND, &fimc->state)) {
1444 		unsigned long irq_flags;
1445 		spin_lock_irqsave(&fimc->slock, irq_flags);
1446 		if (!list_empty(&fimc->vid_cap.active_buf_q)) {
1447 			buf = list_entry(fimc->vid_cap.active_buf_q.next,
1448 					 struct fimc_vid_buffer, list);
1449 			vb2_set_plane_payload(&buf->vb.vb2_buf, 0,
1450 					      *((u32 *)arg));
1451 		}
1452 		fimc_capture_irq_handler(fimc, 1);
1453 		fimc_deactivate_capture(fimc);
1454 		spin_unlock_irqrestore(&fimc->slock, irq_flags);
1455 	}
1456 	spin_unlock_irqrestore(&fmd->slock, flags);
1457 }
1458 
fimc_subdev_enum_mbus_code(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_mbus_code_enum * code)1459 static int fimc_subdev_enum_mbus_code(struct v4l2_subdev *sd,
1460 				      struct v4l2_subdev_state *sd_state,
1461 				      struct v4l2_subdev_mbus_code_enum *code)
1462 {
1463 	const struct fimc_fmt *fmt;
1464 
1465 	fmt = fimc_find_format(NULL, NULL, FMT_FLAGS_CAM, code->index);
1466 	if (!fmt)
1467 		return -EINVAL;
1468 	code->code = fmt->mbus_code;
1469 	return 0;
1470 }
1471 
fimc_subdev_get_fmt(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_format * fmt)1472 static int fimc_subdev_get_fmt(struct v4l2_subdev *sd,
1473 			       struct v4l2_subdev_state *sd_state,
1474 			       struct v4l2_subdev_format *fmt)
1475 {
1476 	struct fimc_dev *fimc = v4l2_get_subdevdata(sd);
1477 	struct fimc_ctx *ctx = fimc->vid_cap.ctx;
1478 	const struct fimc_frame *ff = &ctx->s_frame;
1479 	struct v4l2_mbus_framefmt *mf;
1480 
1481 	if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
1482 		mf = v4l2_subdev_state_get_format(sd_state, fmt->pad);
1483 		fmt->format = *mf;
1484 		return 0;
1485 	}
1486 
1487 	mf = &fmt->format;
1488 	mutex_lock(&fimc->lock);
1489 
1490 	switch (fmt->pad) {
1491 	case FIMC_SD_PAD_SOURCE:
1492 		if (!WARN_ON(ff->fmt == NULL))
1493 			mf->code = ff->fmt->mbus_code;
1494 		/* Sink pads crop rectangle size */
1495 		mf->width = ff->width;
1496 		mf->height = ff->height;
1497 		break;
1498 	case FIMC_SD_PAD_SINK_FIFO:
1499 		*mf = fimc->vid_cap.wb_fmt;
1500 		break;
1501 	case FIMC_SD_PAD_SINK_CAM:
1502 	default:
1503 		*mf = fimc->vid_cap.ci_fmt;
1504 		break;
1505 	}
1506 
1507 	mutex_unlock(&fimc->lock);
1508 	mf->colorspace = V4L2_COLORSPACE_JPEG;
1509 
1510 	return 0;
1511 }
1512 
fimc_subdev_set_fmt(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_format * fmt)1513 static int fimc_subdev_set_fmt(struct v4l2_subdev *sd,
1514 			       struct v4l2_subdev_state *sd_state,
1515 			       struct v4l2_subdev_format *fmt)
1516 {
1517 	struct fimc_dev *fimc = v4l2_get_subdevdata(sd);
1518 	struct v4l2_mbus_framefmt *mf = &fmt->format;
1519 	struct fimc_vid_cap *vc = &fimc->vid_cap;
1520 	struct fimc_ctx *ctx = vc->ctx;
1521 	struct fimc_frame *ff;
1522 	const struct fimc_fmt *ffmt;
1523 
1524 	dbg("pad%d: code: 0x%x, %dx%d",
1525 	    fmt->pad, mf->code, mf->width, mf->height);
1526 
1527 	if (fmt->pad == FIMC_SD_PAD_SOURCE && vb2_is_busy(&vc->vbq))
1528 		return -EBUSY;
1529 
1530 	mutex_lock(&fimc->lock);
1531 	ffmt = fimc_capture_try_format(ctx, &mf->width, &mf->height,
1532 				       &mf->code, NULL, fmt->pad);
1533 	mutex_unlock(&fimc->lock);
1534 	mf->colorspace = V4L2_COLORSPACE_JPEG;
1535 
1536 	if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
1537 		mf = v4l2_subdev_state_get_format(sd_state, fmt->pad);
1538 		*mf = fmt->format;
1539 		return 0;
1540 	}
1541 	/* There must be a bug in the driver if this happens */
1542 	if (WARN_ON(ffmt == NULL))
1543 		return -EINVAL;
1544 
1545 	/* Update RGB Alpha control state and value range */
1546 	fimc_alpha_ctrl_update(ctx);
1547 
1548 	fimc_capture_mark_jpeg_xfer(ctx, ffmt->color);
1549 	if (fmt->pad == FIMC_SD_PAD_SOURCE) {
1550 		ff = &ctx->d_frame;
1551 		/* Sink pads crop rectangle size */
1552 		mf->width = ctx->s_frame.width;
1553 		mf->height = ctx->s_frame.height;
1554 	} else {
1555 		ff = &ctx->s_frame;
1556 	}
1557 
1558 	mutex_lock(&fimc->lock);
1559 	set_frame_bounds(ff, mf->width, mf->height);
1560 
1561 	if (fmt->pad == FIMC_SD_PAD_SINK_FIFO)
1562 		vc->wb_fmt = *mf;
1563 	else if (fmt->pad == FIMC_SD_PAD_SINK_CAM)
1564 		vc->ci_fmt = *mf;
1565 
1566 	ff->fmt = ffmt;
1567 
1568 	/* Reset the crop rectangle if required. */
1569 	if (!(fmt->pad == FIMC_SD_PAD_SOURCE && (ctx->state & FIMC_COMPOSE)))
1570 		set_frame_crop(ff, 0, 0, mf->width, mf->height);
1571 
1572 	if (fmt->pad != FIMC_SD_PAD_SOURCE)
1573 		ctx->state &= ~FIMC_COMPOSE;
1574 
1575 	mutex_unlock(&fimc->lock);
1576 	return 0;
1577 }
1578 
fimc_subdev_get_selection(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_selection * sel)1579 static int fimc_subdev_get_selection(struct v4l2_subdev *sd,
1580 				     struct v4l2_subdev_state *sd_state,
1581 				     struct v4l2_subdev_selection *sel)
1582 {
1583 	struct fimc_dev *fimc = v4l2_get_subdevdata(sd);
1584 	struct fimc_ctx *ctx = fimc->vid_cap.ctx;
1585 	const struct fimc_frame *f = &ctx->s_frame;
1586 	struct v4l2_rect *r = &sel->r;
1587 	struct v4l2_rect *try_sel;
1588 
1589 	if (sel->pad == FIMC_SD_PAD_SOURCE)
1590 		return -EINVAL;
1591 
1592 	mutex_lock(&fimc->lock);
1593 
1594 	switch (sel->target) {
1595 	case V4L2_SEL_TGT_COMPOSE_BOUNDS:
1596 		f = &ctx->d_frame;
1597 		fallthrough;
1598 	case V4L2_SEL_TGT_CROP_BOUNDS:
1599 		r->width = f->o_width;
1600 		r->height = f->o_height;
1601 		r->left = 0;
1602 		r->top = 0;
1603 		mutex_unlock(&fimc->lock);
1604 		return 0;
1605 
1606 	case V4L2_SEL_TGT_CROP:
1607 		try_sel = v4l2_subdev_state_get_crop(sd_state, sel->pad);
1608 		break;
1609 	case V4L2_SEL_TGT_COMPOSE:
1610 		try_sel = v4l2_subdev_state_get_compose(sd_state, sel->pad);
1611 		f = &ctx->d_frame;
1612 		break;
1613 	default:
1614 		mutex_unlock(&fimc->lock);
1615 		return -EINVAL;
1616 	}
1617 
1618 	if (sel->which == V4L2_SUBDEV_FORMAT_TRY) {
1619 		sel->r = *try_sel;
1620 	} else {
1621 		r->left = f->offs_h;
1622 		r->top = f->offs_v;
1623 		r->width = f->width;
1624 		r->height = f->height;
1625 	}
1626 
1627 	dbg("target %#x: l:%d, t:%d, %dx%d, f_w: %d, f_h: %d",
1628 	    sel->pad, r->left, r->top, r->width, r->height,
1629 	    f->f_width, f->f_height);
1630 
1631 	mutex_unlock(&fimc->lock);
1632 	return 0;
1633 }
1634 
fimc_subdev_set_selection(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_selection * sel)1635 static int fimc_subdev_set_selection(struct v4l2_subdev *sd,
1636 				     struct v4l2_subdev_state *sd_state,
1637 				     struct v4l2_subdev_selection *sel)
1638 {
1639 	struct fimc_dev *fimc = v4l2_get_subdevdata(sd);
1640 	struct fimc_ctx *ctx = fimc->vid_cap.ctx;
1641 	struct fimc_frame *f = &ctx->s_frame;
1642 	struct v4l2_rect *r = &sel->r;
1643 	struct v4l2_rect *try_sel;
1644 	unsigned long flags;
1645 
1646 	if (sel->pad == FIMC_SD_PAD_SOURCE)
1647 		return -EINVAL;
1648 
1649 	mutex_lock(&fimc->lock);
1650 	fimc_capture_try_selection(ctx, r, V4L2_SEL_TGT_CROP);
1651 
1652 	switch (sel->target) {
1653 	case V4L2_SEL_TGT_CROP:
1654 		try_sel = v4l2_subdev_state_get_crop(sd_state, sel->pad);
1655 		break;
1656 	case V4L2_SEL_TGT_COMPOSE:
1657 		try_sel = v4l2_subdev_state_get_compose(sd_state, sel->pad);
1658 		f = &ctx->d_frame;
1659 		break;
1660 	default:
1661 		mutex_unlock(&fimc->lock);
1662 		return -EINVAL;
1663 	}
1664 
1665 	if (sel->which == V4L2_SUBDEV_FORMAT_TRY) {
1666 		*try_sel = sel->r;
1667 	} else {
1668 		spin_lock_irqsave(&fimc->slock, flags);
1669 		set_frame_crop(f, r->left, r->top, r->width, r->height);
1670 		set_bit(ST_CAPT_APPLY_CFG, &fimc->state);
1671 		if (sel->target == V4L2_SEL_TGT_COMPOSE)
1672 			ctx->state |= FIMC_COMPOSE;
1673 		spin_unlock_irqrestore(&fimc->slock, flags);
1674 	}
1675 
1676 	dbg("target %#x: (%d,%d)/%dx%d", sel->target, r->left, r->top,
1677 	    r->width, r->height);
1678 
1679 	mutex_unlock(&fimc->lock);
1680 	return 0;
1681 }
1682 
1683 static const struct v4l2_subdev_pad_ops fimc_subdev_pad_ops = {
1684 	.enum_mbus_code = fimc_subdev_enum_mbus_code,
1685 	.get_selection = fimc_subdev_get_selection,
1686 	.set_selection = fimc_subdev_set_selection,
1687 	.get_fmt = fimc_subdev_get_fmt,
1688 	.set_fmt = fimc_subdev_set_fmt,
1689 };
1690 
1691 static const struct v4l2_subdev_ops fimc_subdev_ops = {
1692 	.pad = &fimc_subdev_pad_ops,
1693 };
1694 
1695 /* Set default format at the sensor and host interface */
fimc_capture_set_default_format(struct fimc_dev * fimc)1696 static int fimc_capture_set_default_format(struct fimc_dev *fimc)
1697 {
1698 	struct v4l2_format fmt = {
1699 		.type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE,
1700 		.fmt.pix_mp = {
1701 			.width		= FIMC_DEFAULT_WIDTH,
1702 			.height		= FIMC_DEFAULT_HEIGHT,
1703 			.pixelformat	= V4L2_PIX_FMT_YUYV,
1704 			.field		= V4L2_FIELD_NONE,
1705 			.colorspace	= V4L2_COLORSPACE_JPEG,
1706 		},
1707 	};
1708 
1709 	return __fimc_capture_set_format(fimc, &fmt);
1710 }
1711 
1712 /* fimc->lock must be already initialized */
fimc_register_capture_device(struct fimc_dev * fimc,struct v4l2_device * v4l2_dev)1713 static int fimc_register_capture_device(struct fimc_dev *fimc,
1714 				 struct v4l2_device *v4l2_dev)
1715 {
1716 	struct video_device *vfd = &fimc->vid_cap.ve.vdev;
1717 	struct vb2_queue *q = &fimc->vid_cap.vbq;
1718 	struct fimc_vid_cap *vid_cap;
1719 	const struct fimc_fmt *fmt;
1720 	struct fimc_ctx *ctx;
1721 	int ret = -ENOMEM;
1722 
1723 	ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
1724 	if (!ctx)
1725 		return -ENOMEM;
1726 
1727 	ctx->fimc_dev	 = fimc;
1728 	ctx->in_path	 = FIMC_IO_CAMERA;
1729 	ctx->out_path	 = FIMC_IO_DMA;
1730 	ctx->state	 = FIMC_CTX_CAP;
1731 	ctx->s_frame.fmt = fimc_find_format(NULL, NULL, FMT_FLAGS_CAM, 0);
1732 	ctx->d_frame.fmt = ctx->s_frame.fmt;
1733 
1734 	memset(vfd, 0, sizeof(*vfd));
1735 	snprintf(vfd->name, sizeof(vfd->name), "fimc.%d.capture", fimc->id);
1736 
1737 	vfd->fops	= &fimc_capture_fops;
1738 	vfd->ioctl_ops	= &fimc_capture_ioctl_ops;
1739 	vfd->v4l2_dev	= v4l2_dev;
1740 	vfd->minor	= -1;
1741 	vfd->release	= video_device_release_empty;
1742 	vfd->queue	= q;
1743 	vfd->lock	= &fimc->lock;
1744 	vfd->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_CAPTURE_MPLANE;
1745 
1746 	video_set_drvdata(vfd, fimc);
1747 	vid_cap = &fimc->vid_cap;
1748 	vid_cap->active_buf_cnt = 0;
1749 	vid_cap->reqbufs_count = 0;
1750 	vid_cap->ctx = ctx;
1751 
1752 	INIT_LIST_HEAD(&vid_cap->pending_buf_q);
1753 	INIT_LIST_HEAD(&vid_cap->active_buf_q);
1754 
1755 	memset(q, 0, sizeof(*q));
1756 	q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
1757 	q->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
1758 	q->drv_priv = ctx;
1759 	q->ops = &fimc_capture_qops;
1760 	q->mem_ops = &vb2_dma_contig_memops;
1761 	q->buf_struct_size = sizeof(struct fimc_vid_buffer);
1762 	q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1763 	q->lock = &fimc->lock;
1764 	q->dev = &fimc->pdev->dev;
1765 
1766 	ret = vb2_queue_init(q);
1767 	if (ret)
1768 		goto err_free_ctx;
1769 
1770 	/* Default format configuration */
1771 	fmt = fimc_find_format(NULL, NULL, FMT_FLAGS_CAM, 0);
1772 	vid_cap->ci_fmt.width = FIMC_DEFAULT_WIDTH;
1773 	vid_cap->ci_fmt.height = FIMC_DEFAULT_HEIGHT;
1774 	vid_cap->ci_fmt.code = fmt->mbus_code;
1775 
1776 	ctx->s_frame.width = FIMC_DEFAULT_WIDTH;
1777 	ctx->s_frame.height = FIMC_DEFAULT_HEIGHT;
1778 	ctx->s_frame.fmt = fmt;
1779 
1780 	fmt = fimc_find_format(NULL, NULL, FMT_FLAGS_WRITEBACK, 0);
1781 	vid_cap->wb_fmt = vid_cap->ci_fmt;
1782 	vid_cap->wb_fmt.code = fmt->mbus_code;
1783 
1784 	vid_cap->vd_pad.flags = MEDIA_PAD_FL_SINK;
1785 	vfd->entity.function = MEDIA_ENT_F_PROC_VIDEO_SCALER;
1786 	ret = media_entity_pads_init(&vfd->entity, 1, &vid_cap->vd_pad);
1787 	if (ret)
1788 		goto err_free_ctx;
1789 
1790 	ret = fimc_ctrls_create(ctx);
1791 	if (ret)
1792 		goto err_me_cleanup;
1793 
1794 	ret = video_register_device(vfd, VFL_TYPE_VIDEO, -1);
1795 	if (ret)
1796 		goto err_ctrl_free;
1797 
1798 	v4l2_info(v4l2_dev, "Registered %s as /dev/%s\n",
1799 		  vfd->name, video_device_node_name(vfd));
1800 
1801 	vfd->ctrl_handler = &ctx->ctrls.handler;
1802 	return 0;
1803 
1804 err_ctrl_free:
1805 	fimc_ctrls_delete(ctx);
1806 err_me_cleanup:
1807 	media_entity_cleanup(&vfd->entity);
1808 err_free_ctx:
1809 	kfree(ctx);
1810 	return ret;
1811 }
1812 
fimc_capture_subdev_registered(struct v4l2_subdev * sd)1813 static int fimc_capture_subdev_registered(struct v4l2_subdev *sd)
1814 {
1815 	struct fimc_dev *fimc = v4l2_get_subdevdata(sd);
1816 	int ret;
1817 
1818 	if (fimc == NULL)
1819 		return -ENXIO;
1820 
1821 	ret = fimc_register_m2m_device(fimc, sd->v4l2_dev);
1822 	if (ret)
1823 		return ret;
1824 
1825 	fimc->vid_cap.ve.pipe = v4l2_get_subdev_hostdata(sd);
1826 
1827 	ret = fimc_register_capture_device(fimc, sd->v4l2_dev);
1828 	if (ret) {
1829 		fimc_unregister_m2m_device(fimc);
1830 		fimc->vid_cap.ve.pipe = NULL;
1831 	}
1832 
1833 	return ret;
1834 }
1835 
fimc_capture_subdev_unregistered(struct v4l2_subdev * sd)1836 static void fimc_capture_subdev_unregistered(struct v4l2_subdev *sd)
1837 {
1838 	struct fimc_dev *fimc = v4l2_get_subdevdata(sd);
1839 	struct video_device *vdev;
1840 
1841 	if (fimc == NULL)
1842 		return;
1843 
1844 	mutex_lock(&fimc->lock);
1845 
1846 	fimc_unregister_m2m_device(fimc);
1847 	vdev = &fimc->vid_cap.ve.vdev;
1848 
1849 	if (video_is_registered(vdev)) {
1850 		video_unregister_device(vdev);
1851 		media_entity_cleanup(&vdev->entity);
1852 		fimc_ctrls_delete(fimc->vid_cap.ctx);
1853 		fimc->vid_cap.ve.pipe = NULL;
1854 	}
1855 	kfree(fimc->vid_cap.ctx);
1856 	fimc->vid_cap.ctx = NULL;
1857 
1858 	mutex_unlock(&fimc->lock);
1859 }
1860 
1861 static const struct v4l2_subdev_internal_ops fimc_capture_sd_internal_ops = {
1862 	.registered = fimc_capture_subdev_registered,
1863 	.unregistered = fimc_capture_subdev_unregistered,
1864 };
1865 
fimc_initialize_capture_subdev(struct fimc_dev * fimc)1866 int fimc_initialize_capture_subdev(struct fimc_dev *fimc)
1867 {
1868 	struct v4l2_subdev *sd = &fimc->vid_cap.subdev;
1869 	int ret;
1870 
1871 	v4l2_subdev_init(sd, &fimc_subdev_ops);
1872 	sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
1873 	snprintf(sd->name, sizeof(sd->name), "FIMC.%d", fimc->id);
1874 
1875 	fimc->vid_cap.sd_pads[FIMC_SD_PAD_SINK_CAM].flags = MEDIA_PAD_FL_SINK;
1876 	fimc->vid_cap.sd_pads[FIMC_SD_PAD_SINK_FIFO].flags = MEDIA_PAD_FL_SINK;
1877 	fimc->vid_cap.sd_pads[FIMC_SD_PAD_SOURCE].flags = MEDIA_PAD_FL_SOURCE;
1878 	ret = media_entity_pads_init(&sd->entity, FIMC_SD_PADS_NUM,
1879 				fimc->vid_cap.sd_pads);
1880 	if (ret)
1881 		return ret;
1882 
1883 	sd->entity.ops = &fimc_sd_media_ops;
1884 	sd->entity.function = MEDIA_ENT_F_PROC_VIDEO_SCALER;
1885 	sd->internal_ops = &fimc_capture_sd_internal_ops;
1886 	v4l2_set_subdevdata(sd, fimc);
1887 	return 0;
1888 }
1889 
fimc_unregister_capture_subdev(struct fimc_dev * fimc)1890 void fimc_unregister_capture_subdev(struct fimc_dev *fimc)
1891 {
1892 	struct v4l2_subdev *sd = &fimc->vid_cap.subdev;
1893 
1894 	v4l2_device_unregister_subdev(sd);
1895 	media_entity_cleanup(&sd->entity);
1896 	v4l2_set_subdevdata(sd, NULL);
1897 }
1898