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Merge tag 'regmap-fix-v5.11-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git...
[linux/fpc-iii.git] / drivers / media / platform / s3c-camif / camif-capture.c
blob9ca49af29542df899ae7a75b804e35eee31b5ad2
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * s3c24xx/s3c64xx SoC series Camera Interface (CAMIF) driver
4 *
5 * Copyright (C) 2012 Sylwester Nawrocki <sylvester.nawrocki@gmail.com>
6 * Copyright (C) 2012 Tomasz Figa <tomasz.figa@gmail.com>
7 *
8 * Based on drivers/media/platform/s5p-fimc,
9 * Copyright (C) 2010 - 2012 Samsung Electronics Co., Ltd.
10 */
11 #define pr_fmt(fmt) "%s:%d " fmt, __func__, __LINE__
12
13 #include <linux/bug.h>
14 #include <linux/clk.h>
15 #include <linux/device.h>
16 #include <linux/errno.h>
17 #include <linux/i2c.h>
18 #include <linux/interrupt.h>
19 #include <linux/io.h>
20 #include <linux/kernel.h>
21 #include <linux/list.h>
22 #include <linux/module.h>
23 #include <linux/platform_device.h>
24 #include <linux/pm_runtime.h>
25 #include <linux/ratelimit.h>
26 #include <linux/slab.h>
27 #include <linux/types.h>
28 #include <linux/videodev2.h>
29
30 #include <media/media-device.h>
31 #include <media/v4l2-ctrls.h>
32 #include <media/v4l2-event.h>
33 #include <media/v4l2-ioctl.h>
34 #include <media/videobuf2-v4l2.h>
35 #include <media/videobuf2-dma-contig.h>
36
37 #include "camif-core.h"
38 #include "camif-regs.h"
39
40 static int debug;
41 module_param(debug, int, 0644);
42
43 /* Locking: called with vp->camif->slock spinlock held */
44 static void camif_cfg_video_path(struct camif_vp *vp)
45 {
46 WARN_ON(s3c_camif_get_scaler_config(vp, &vp->scaler));
47 camif_hw_set_scaler(vp);
48 camif_hw_set_flip(vp);
49 camif_hw_set_target_format(vp);
50 camif_hw_set_output_dma(vp);
51 }
52
53 static void camif_prepare_dma_offset(struct camif_vp *vp)
54 {
55 struct camif_frame *f = &vp->out_frame;
56
57 f->dma_offset.initial = f->rect.top * f->f_width + f->rect.left;
58 f->dma_offset.line = f->f_width - (f->rect.left + f->rect.width);
59
60 pr_debug("dma_offset: initial: %d, line: %d\n",
61 f->dma_offset.initial, f->dma_offset.line);
62 }
63
64 /* Locking: called with camif->slock spinlock held */
65 static int s3c_camif_hw_init(struct camif_dev *camif, struct camif_vp *vp)
66 {
67 const struct s3c_camif_variant *variant = camif->variant;
68
69 if (camif->sensor.sd == NULL || vp->out_fmt == NULL)
70 return -EINVAL;
71
72 if (variant->ip_revision == S3C244X_CAMIF_IP_REV)
73 camif_hw_clear_fifo_overflow(vp);
74 camif_hw_set_camera_bus(camif);
75 camif_hw_set_source_format(camif);
76 camif_hw_set_camera_crop(camif);
77 camif_hw_set_test_pattern(camif, camif->test_pattern);
78 if (variant->has_img_effect)
79 camif_hw_set_effect(camif, camif->colorfx,
80 camif->colorfx_cr, camif->colorfx_cb);
81 if (variant->ip_revision == S3C6410_CAMIF_IP_REV)
82 camif_hw_set_input_path(vp);
83 camif_cfg_video_path(vp);
84 vp->state &= ~ST_VP_CONFIG;
85
86 return 0;
87 }
88
89 /*
90 * Initialize the video path, only up from the scaler stage. The camera
91 * input interface set up is skipped. This is useful to enable one of the
92 * video paths when the other is already running.
93 * Locking: called with camif->slock spinlock held.
94 */
95 static int s3c_camif_hw_vp_init(struct camif_dev *camif, struct camif_vp *vp)
96 {
97 unsigned int ip_rev = camif->variant->ip_revision;
98
99 if (vp->out_fmt == NULL)
100 return -EINVAL;
101
102 camif_prepare_dma_offset(vp);
103 if (ip_rev == S3C244X_CAMIF_IP_REV)
104 camif_hw_clear_fifo_overflow(vp);
105 camif_cfg_video_path(vp);
106 vp->state &= ~ST_VP_CONFIG;
107 return 0;
108 }
109
110 static int sensor_set_power(struct camif_dev *camif, int on)
111 {
112 struct cam_sensor *sensor = &camif->sensor;
113 int err = 0;
114
115 if (camif->sensor.power_count == !on)
116 err = v4l2_subdev_call(sensor->sd, core, s_power, on);
117 if (err == -ENOIOCTLCMD)
118 err = 0;
119 if (!err)
120 sensor->power_count += on ? 1 : -1;
121
122 pr_debug("on: %d, power_count: %d, err: %d\n",
123 on, sensor->power_count, err);
124
125 return err;
126 }
127
128 static int sensor_set_streaming(struct camif_dev *camif, int on)
129 {
130 struct cam_sensor *sensor = &camif->sensor;
131 int err = 0;
132
133 if (camif->sensor.stream_count == !on)
134 err = v4l2_subdev_call(sensor->sd, video, s_stream, on);
135 if (!err)
136 sensor->stream_count += on ? 1 : -1;
137
138 pr_debug("on: %d, stream_count: %d, err: %d\n",
139 on, sensor->stream_count, err);
140
141 return err;
142 }
143
144 /*
145 * Reinitialize the driver so it is ready to start streaming again.
146 * Return any buffers to vb2, perform CAMIF software reset and
147 * turn off streaming at the data pipeline (sensor) if required.
148 */
149 static int camif_reinitialize(struct camif_vp *vp)
150 {
151 struct camif_dev *camif = vp->camif;
152 struct camif_buffer *buf;
153 unsigned long flags;
154 bool streaming;
155
156 spin_lock_irqsave(&camif->slock, flags);
157 streaming = vp->state & ST_VP_SENSOR_STREAMING;
158
159 vp->state &= ~(ST_VP_PENDING | ST_VP_RUNNING | ST_VP_OFF |
160 ST_VP_ABORTING | ST_VP_STREAMING |
161 ST_VP_SENSOR_STREAMING | ST_VP_LASTIRQ);
162
163 /* Release unused buffers */
164 while (!list_empty(&vp->pending_buf_q)) {
165 buf = camif_pending_queue_pop(vp);
166 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
167 }
168
169 while (!list_empty(&vp->active_buf_q)) {
170 buf = camif_active_queue_pop(vp);
171 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
172 }
173
174 spin_unlock_irqrestore(&camif->slock, flags);
175
176 if (!streaming)
177 return 0;
178
179 return sensor_set_streaming(camif, 0);
180 }
181
182 static bool s3c_vp_active(struct camif_vp *vp)
183 {
184 struct camif_dev *camif = vp->camif;
185 unsigned long flags;
186 bool ret;
187
188 spin_lock_irqsave(&camif->slock, flags);
189 ret = (vp->state & ST_VP_RUNNING) || (vp->state & ST_VP_PENDING);
190 spin_unlock_irqrestore(&camif->slock, flags);
191
192 return ret;
193 }
194
195 static bool camif_is_streaming(struct camif_dev *camif)
196 {
197 unsigned long flags;
198 bool status;
199
200 spin_lock_irqsave(&camif->slock, flags);
201 status = camif->stream_count > 0;
202 spin_unlock_irqrestore(&camif->slock, flags);
203
204 return status;
205 }
206
207 static int camif_stop_capture(struct camif_vp *vp)
208 {
209 struct camif_dev *camif = vp->camif;
210 unsigned long flags;
211 int ret;
212
213 if (!s3c_vp_active(vp))
214 return 0;
215
216 spin_lock_irqsave(&camif->slock, flags);
217 vp->state &= ~(ST_VP_OFF | ST_VP_LASTIRQ);
218 vp->state |= ST_VP_ABORTING;
219 spin_unlock_irqrestore(&camif->slock, flags);
220
221 ret = wait_event_timeout(vp->irq_queue,
222 !(vp->state & ST_VP_ABORTING),
223 msecs_to_jiffies(CAMIF_STOP_TIMEOUT));
224
225 spin_lock_irqsave(&camif->slock, flags);
226
227 if (ret == 0 && !(vp->state & ST_VP_OFF)) {
228 /* Timed out, forcibly stop capture */
229 vp->state &= ~(ST_VP_OFF | ST_VP_ABORTING |
230 ST_VP_LASTIRQ);
231
232 camif_hw_disable_capture(vp);
233 camif_hw_enable_scaler(vp, false);
234 }
235
236 spin_unlock_irqrestore(&camif->slock, flags);
237
238 return camif_reinitialize(vp);
239 }
240
241 static int camif_prepare_addr(struct camif_vp *vp, struct vb2_buffer *vb,
242 struct camif_addr *paddr)
243 {
244 struct camif_frame *frame = &vp->out_frame;
245 u32 pix_size;
246
247 if (vb == NULL || frame == NULL)
248 return -EINVAL;
249
250 pix_size = frame->rect.width * frame->rect.height;
251
252 pr_debug("colplanes: %d, pix_size: %u\n",
253 vp->out_fmt->colplanes, pix_size);
254
255 paddr->y = vb2_dma_contig_plane_dma_addr(vb, 0);
256
257 switch (vp->out_fmt->colplanes) {
258 case 1:
259 paddr->cb = 0;
260 paddr->cr = 0;
261 break;
262 case 2:
263 /* decompose Y into Y/Cb */
264 paddr->cb = (u32)(paddr->y + pix_size);
265 paddr->cr = 0;
266 break;
267 case 3:
268 paddr->cb = (u32)(paddr->y + pix_size);
269 /* decompose Y into Y/Cb/Cr */
270 if (vp->out_fmt->color == IMG_FMT_YCBCR422P)
271 paddr->cr = (u32)(paddr->cb + (pix_size >> 1));
272 else /* 420 */
273 paddr->cr = (u32)(paddr->cb + (pix_size >> 2));
274
275 if (vp->out_fmt->color == IMG_FMT_YCRCB420)
276 swap(paddr->cb, paddr->cr);
277 break;
278 default:
279 return -EINVAL;
280 }
281
282 pr_debug("DMA address: y: %pad cb: %pad cr: %pad\n",
283 &paddr->y, &paddr->cb, &paddr->cr);
284
285 return 0;
286 }
287
288 irqreturn_t s3c_camif_irq_handler(int irq, void *priv)
289 {
290 struct camif_vp *vp = priv;
291 struct camif_dev *camif = vp->camif;
292 unsigned int ip_rev = camif->variant->ip_revision;
293 unsigned int status;
294
295 spin_lock(&camif->slock);
296
297 if (ip_rev == S3C6410_CAMIF_IP_REV)
298 camif_hw_clear_pending_irq(vp);
299
300 status = camif_hw_get_status(vp);
301
302 if (ip_rev == S3C244X_CAMIF_IP_REV && (status & CISTATUS_OVF_MASK)) {
303 camif_hw_clear_fifo_overflow(vp);
304 goto unlock;
305 }
306
307 if (vp->state & ST_VP_ABORTING) {
308 if (vp->state & ST_VP_OFF) {
309 /* Last IRQ */
310 vp->state &= ~(ST_VP_OFF | ST_VP_ABORTING |
311 ST_VP_LASTIRQ);
312 wake_up(&vp->irq_queue);
313 goto unlock;
314 } else if (vp->state & ST_VP_LASTIRQ) {
315 camif_hw_disable_capture(vp);
316 camif_hw_enable_scaler(vp, false);
317 camif_hw_set_lastirq(vp, false);
318 vp->state |= ST_VP_OFF;
319 } else {
320 /* Disable capture, enable last IRQ */
321 camif_hw_set_lastirq(vp, true);
322 vp->state |= ST_VP_LASTIRQ;
323 }
324 }
325
326 if (!list_empty(&vp->pending_buf_q) && (vp->state & ST_VP_RUNNING) &&
327 !list_empty(&vp->active_buf_q)) {
328 unsigned int index;
329 struct camif_buffer *vbuf;
330 /*
331 * Get previous DMA write buffer index:
332 * 0 => DMA buffer 0, 2;
333 * 1 => DMA buffer 1, 3.
334 */
335 index = (CISTATUS_FRAMECNT(status) + 2) & 1;
336 vbuf = camif_active_queue_peek(vp, index);
337
338 if (!WARN_ON(vbuf == NULL)) {
339 /* Dequeue a filled buffer */
340 vbuf->vb.vb2_buf.timestamp = ktime_get_ns();
341 vbuf->vb.sequence = vp->frame_sequence++;
342 vb2_buffer_done(&vbuf->vb.vb2_buf, VB2_BUF_STATE_DONE);
343
344 /* Set up an empty buffer at the DMA engine */
345 vbuf = camif_pending_queue_pop(vp);
346 vbuf->index = index;
347 camif_hw_set_output_addr(vp, &vbuf->paddr, index);
348 camif_hw_set_output_addr(vp, &vbuf->paddr, index + 2);
349
350 /* Scheduled in H/W, add to the queue */
351 camif_active_queue_add(vp, vbuf);
352 }
353 } else if (!(vp->state & ST_VP_ABORTING) &&
354 (vp->state & ST_VP_PENDING)) {
355 vp->state |= ST_VP_RUNNING;
356 }
357
358 if (vp->state & ST_VP_CONFIG) {
359 camif_prepare_dma_offset(vp);
360 camif_hw_set_camera_crop(camif);
361 camif_hw_set_scaler(vp);
362 camif_hw_set_flip(vp);
363 camif_hw_set_test_pattern(camif, camif->test_pattern);
364 if (camif->variant->has_img_effect)
365 camif_hw_set_effect(camif, camif->colorfx,
366 camif->colorfx_cr, camif->colorfx_cb);
367 vp->state &= ~ST_VP_CONFIG;
368 }
369 unlock:
370 spin_unlock(&camif->slock);
371 return IRQ_HANDLED;
372 }
373
374 static int start_streaming(struct vb2_queue *vq, unsigned int count)
375 {
376 struct camif_vp *vp = vb2_get_drv_priv(vq);
377 struct camif_dev *camif = vp->camif;
378 unsigned long flags;
379 int ret;
380
381 /*
382 * We assume the codec capture path is always activated
383 * first, before the preview path starts streaming.
384 * This is required to avoid internal FIFO overflow and
385 * a need for CAMIF software reset.
386 */
387 spin_lock_irqsave(&camif->slock, flags);
388
389 if (camif->stream_count == 0) {
390 camif_hw_reset(camif);
391 ret = s3c_camif_hw_init(camif, vp);
392 } else {
393 ret = s3c_camif_hw_vp_init(camif, vp);
394 }
395 spin_unlock_irqrestore(&camif->slock, flags);
396
397 if (ret < 0) {
398 camif_reinitialize(vp);
399 return ret;
400 }
401
402 spin_lock_irqsave(&camif->slock, flags);
403 vp->frame_sequence = 0;
404 vp->state |= ST_VP_PENDING;
405
406 if (!list_empty(&vp->pending_buf_q) &&
407 (!(vp->state & ST_VP_STREAMING) ||
408 !(vp->state & ST_VP_SENSOR_STREAMING))) {
409
410 camif_hw_enable_scaler(vp, vp->scaler.enable);
411 camif_hw_enable_capture(vp);
412 vp->state |= ST_VP_STREAMING;
413
414 if (!(vp->state & ST_VP_SENSOR_STREAMING)) {
415 vp->state |= ST_VP_SENSOR_STREAMING;
416 spin_unlock_irqrestore(&camif->slock, flags);
417 ret = sensor_set_streaming(camif, 1);
418 if (ret)
419 v4l2_err(&vp->vdev, "Sensor s_stream failed\n");
420 if (debug)
421 camif_hw_dump_regs(camif, __func__);
422
423 return ret;
424 }
425 }
426
427 spin_unlock_irqrestore(&camif->slock, flags);
428 return 0;
429 }
430
431 static void stop_streaming(struct vb2_queue *vq)
432 {
433 struct camif_vp *vp = vb2_get_drv_priv(vq);
434 camif_stop_capture(vp);
435 }
436
437 static int queue_setup(struct vb2_queue *vq,
438 unsigned int *num_buffers, unsigned int *num_planes,
439 unsigned int sizes[], struct device *alloc_devs[])
440 {
441 struct camif_vp *vp = vb2_get_drv_priv(vq);
442 struct camif_frame *frame = &vp->out_frame;
443 const struct camif_fmt *fmt = vp->out_fmt;
444 unsigned int size;
445
446 if (fmt == NULL)
447 return -EINVAL;
448
449 size = (frame->f_width * frame->f_height * fmt->depth) / 8;
450
451 if (*num_planes)
452 return sizes[0] < size ? -EINVAL : 0;
453
454 *num_planes = 1;
455 sizes[0] = size;
456
457 pr_debug("size: %u\n", sizes[0]);
458 return 0;
459 }
460
461 static int buffer_prepare(struct vb2_buffer *vb)
462 {
463 struct camif_vp *vp = vb2_get_drv_priv(vb->vb2_queue);
464
465 if (vp->out_fmt == NULL)
466 return -EINVAL;
467
468 if (vb2_plane_size(vb, 0) < vp->payload) {
469 v4l2_err(&vp->vdev, "buffer too small: %lu, required: %u\n",
470 vb2_plane_size(vb, 0), vp->payload);
471 return -EINVAL;
472 }
473 vb2_set_plane_payload(vb, 0, vp->payload);
474
475 return 0;
476 }
477
478 static void buffer_queue(struct vb2_buffer *vb)
479 {
480 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
481 struct camif_buffer *buf = container_of(vbuf, struct camif_buffer, vb);
482 struct camif_vp *vp = vb2_get_drv_priv(vb->vb2_queue);
483 struct camif_dev *camif = vp->camif;
484 unsigned long flags;
485
486 spin_lock_irqsave(&camif->slock, flags);
487 WARN_ON(camif_prepare_addr(vp, &buf->vb.vb2_buf, &buf->paddr));
488
489 if (!(vp->state & ST_VP_STREAMING) && vp->active_buffers < 2) {
490 /* Schedule an empty buffer in H/W */
491 buf->index = vp->buf_index;
492
493 camif_hw_set_output_addr(vp, &buf->paddr, buf->index);
494 camif_hw_set_output_addr(vp, &buf->paddr, buf->index + 2);
495
496 camif_active_queue_add(vp, buf);
497 vp->buf_index = !vp->buf_index;
498 } else {
499 camif_pending_queue_add(vp, buf);
500 }
501
502 if (vb2_is_streaming(&vp->vb_queue) && !list_empty(&vp->pending_buf_q)
503 && !(vp->state & ST_VP_STREAMING)) {
504
505 vp->state |= ST_VP_STREAMING;
506 camif_hw_enable_scaler(vp, vp->scaler.enable);
507 camif_hw_enable_capture(vp);
508 spin_unlock_irqrestore(&camif->slock, flags);
509
510 if (!(vp->state & ST_VP_SENSOR_STREAMING)) {
511 if (sensor_set_streaming(camif, 1) == 0)
512 vp->state |= ST_VP_SENSOR_STREAMING;
513 else
514 v4l2_err(&vp->vdev, "Sensor s_stream failed\n");
515
516 if (debug)
517 camif_hw_dump_regs(camif, __func__);
518 }
519 return;
520 }
521 spin_unlock_irqrestore(&camif->slock, flags);
522 }
523
524 static const struct vb2_ops s3c_camif_qops = {
525 .queue_setup = queue_setup,
526 .buf_prepare = buffer_prepare,
527 .buf_queue = buffer_queue,
528 .wait_prepare = vb2_ops_wait_prepare,
529 .wait_finish = vb2_ops_wait_finish,
530 .start_streaming = start_streaming,
531 .stop_streaming = stop_streaming,
532 };
533
534 static int s3c_camif_open(struct file *file)
535 {
536 struct camif_vp *vp = video_drvdata(file);
537 struct camif_dev *camif = vp->camif;
538 int ret;
539
540 pr_debug("[vp%d] state: %#x, owner: %p, pid: %d\n", vp->id,
541 vp->state, vp->owner, task_pid_nr(current));
542
543 if (mutex_lock_interruptible(&camif->lock))
544 return -ERESTARTSYS;
545
546 ret = v4l2_fh_open(file);
547 if (ret < 0)
548 goto unlock;
549
550 ret = pm_runtime_get_sync(camif->dev);
551 if (ret < 0)
552 goto err_pm;
553
554 ret = sensor_set_power(camif, 1);
555 if (!ret)
556 goto unlock;
557
558 pm_runtime_put(camif->dev);
559 err_pm:
560 v4l2_fh_release(file);
561 unlock:
562 mutex_unlock(&camif->lock);
563 return ret;
564 }
565
566 static int s3c_camif_close(struct file *file)
567 {
568 struct camif_vp *vp = video_drvdata(file);
569 struct camif_dev *camif = vp->camif;
570 int ret;
571
572 pr_debug("[vp%d] state: %#x, owner: %p, pid: %d\n", vp->id,
573 vp->state, vp->owner, task_pid_nr(current));
574
575 mutex_lock(&camif->lock);
576
577 if (vp->owner == file->private_data) {
578 camif_stop_capture(vp);
579 vb2_queue_release(&vp->vb_queue);
580 vp->owner = NULL;
581 }
582
583 sensor_set_power(camif, 0);
584
585 pm_runtime_put(camif->dev);
586 ret = v4l2_fh_release(file);
587
588 mutex_unlock(&camif->lock);
589 return ret;
590 }
591
592 static __poll_t s3c_camif_poll(struct file *file,
593 struct poll_table_struct *wait)
594 {
595 struct camif_vp *vp = video_drvdata(file);
596 struct camif_dev *camif = vp->camif;
597 __poll_t ret;
598
599 mutex_lock(&camif->lock);
600 if (vp->owner && vp->owner != file->private_data)
601 ret = EPOLLERR;
602 else
603 ret = vb2_poll(&vp->vb_queue, file, wait);
604
605 mutex_unlock(&camif->lock);
606 return ret;
607 }
608
609 static int s3c_camif_mmap(struct file *file, struct vm_area_struct *vma)
610 {
611 struct camif_vp *vp = video_drvdata(file);
612 int ret;
613
614 if (vp->owner && vp->owner != file->private_data)
615 ret = -EBUSY;
616 else
617 ret = vb2_mmap(&vp->vb_queue, vma);
618
619 return ret;
620 }
621
622 static const struct v4l2_file_operations s3c_camif_fops = {
623 .owner = THIS_MODULE,
624 .open = s3c_camif_open,
625 .release = s3c_camif_close,
626 .poll = s3c_camif_poll,
627 .unlocked_ioctl = video_ioctl2,
628 .mmap = s3c_camif_mmap,
629 };
630
631 /*
632 * Video node IOCTLs
633 */
634
635 static int s3c_camif_vidioc_querycap(struct file *file, void *priv,
636 struct v4l2_capability *cap)
637 {
638 struct camif_vp *vp = video_drvdata(file);
639
640 strscpy(cap->driver, S3C_CAMIF_DRIVER_NAME, sizeof(cap->driver));
641 strscpy(cap->card, S3C_CAMIF_DRIVER_NAME, sizeof(cap->card));
642 snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s.%d",
643 dev_name(vp->camif->dev), vp->id);
644 return 0;
645 }
646
647 static int s3c_camif_vidioc_enum_input(struct file *file, void *priv,
648 struct v4l2_input *input)
649 {
650 struct camif_vp *vp = video_drvdata(file);
651 struct v4l2_subdev *sensor = vp->camif->sensor.sd;
652
653 if (input->index || sensor == NULL)
654 return -EINVAL;
655
656 input->type = V4L2_INPUT_TYPE_CAMERA;
657 strscpy(input->name, sensor->name, sizeof(input->name));
658 return 0;
659 }
660
661 static int s3c_camif_vidioc_s_input(struct file *file, void *priv,
662 unsigned int i)
663 {
664 return i == 0 ? 0 : -EINVAL;
665 }
666
667 static int s3c_camif_vidioc_g_input(struct file *file, void *priv,
668 unsigned int *i)
669 {
670 *i = 0;
671 return 0;
672 }
673
674 static int s3c_camif_vidioc_enum_fmt(struct file *file, void *priv,
675 struct v4l2_fmtdesc *f)
676 {
677 struct camif_vp *vp = video_drvdata(file);
678 const struct camif_fmt *fmt;
679
680 fmt = s3c_camif_find_format(vp, NULL, f->index);
681 if (!fmt)
682 return -EINVAL;
683
684 f->pixelformat = fmt->fourcc;
685 return 0;
686 }
687
688 static int s3c_camif_vidioc_g_fmt(struct file *file, void *priv,
689 struct v4l2_format *f)
690 {
691 struct camif_vp *vp = video_drvdata(file);
692 struct v4l2_pix_format *pix = &f->fmt.pix;
693 struct camif_frame *frame = &vp->out_frame;
694 const struct camif_fmt *fmt = vp->out_fmt;
695
696 pix->bytesperline = frame->f_width * fmt->ybpp;
697 pix->sizeimage = vp->payload;
698
699 pix->pixelformat = fmt->fourcc;
700 pix->width = frame->f_width;
701 pix->height = frame->f_height;
702 pix->field = V4L2_FIELD_NONE;
703 pix->colorspace = V4L2_COLORSPACE_JPEG;
704
705 return 0;
706 }
707
708 static int __camif_video_try_format(struct camif_vp *vp,
709 struct v4l2_pix_format *pix,
710 const struct camif_fmt **ffmt)
711 {
712 struct camif_dev *camif = vp->camif;
713 struct v4l2_rect *crop = &camif->camif_crop;
714 unsigned int wmin, hmin, sc_hrmax, sc_vrmax;
715 const struct vp_pix_limits *pix_lim;
716 const struct camif_fmt *fmt;
717
718 fmt = s3c_camif_find_format(vp, &pix->pixelformat, 0);
719
720 if (WARN_ON(fmt == NULL))
721 return -EINVAL;
722
723 if (ffmt)
724 *ffmt = fmt;
725
726 pix_lim = &camif->variant->vp_pix_limits[vp->id];
727
728 pr_debug("fmt: %ux%u, crop: %ux%u, bytesperline: %u\n",
729 pix->width, pix->height, crop->width, crop->height,
730 pix->bytesperline);
731 /*
732 * Calculate minimum width and height according to the configured
733 * camera input interface crop rectangle and the resizer's capabilities.
734 */
735 sc_hrmax = min(SCALER_MAX_RATIO, 1 << (ffs(crop->width) - 3));
736 sc_vrmax = min(SCALER_MAX_RATIO, 1 << (ffs(crop->height) - 1));
737
738 wmin = max_t(u32, pix_lim->min_out_width, crop->width / sc_hrmax);
739 wmin = round_up(wmin, pix_lim->out_width_align);
740 hmin = max_t(u32, 8, crop->height / sc_vrmax);
741 hmin = round_up(hmin, 8);
742
743 v4l_bound_align_image(&pix->width, wmin, pix_lim->max_sc_out_width,
744 ffs(pix_lim->out_width_align) - 1,
745 &pix->height, hmin, pix_lim->max_height, 0, 0);
746
747 pix->bytesperline = pix->width * fmt->ybpp;
748 pix->sizeimage = (pix->width * pix->height * fmt->depth) / 8;
749 pix->pixelformat = fmt->fourcc;
750 pix->colorspace = V4L2_COLORSPACE_JPEG;
751 pix->field = V4L2_FIELD_NONE;
752
753 pr_debug("%ux%u, wmin: %d, hmin: %d, sc_hrmax: %d, sc_vrmax: %d\n",
754 pix->width, pix->height, wmin, hmin, sc_hrmax, sc_vrmax);
755
756 return 0;
757 }
758
759 static int s3c_camif_vidioc_try_fmt(struct file *file, void *priv,
760 struct v4l2_format *f)
761 {
762 struct camif_vp *vp = video_drvdata(file);
763 return __camif_video_try_format(vp, &f->fmt.pix, NULL);
764 }
765
766 static int s3c_camif_vidioc_s_fmt(struct file *file, void *priv,
767 struct v4l2_format *f)
768 {
769 struct v4l2_pix_format *pix = &f->fmt.pix;
770 struct camif_vp *vp = video_drvdata(file);
771 struct camif_frame *out_frame = &vp->out_frame;
772 const struct camif_fmt *fmt = NULL;
773 int ret;
774
775 pr_debug("[vp%d]\n", vp->id);
776
777 if (vb2_is_busy(&vp->vb_queue))
778 return -EBUSY;
779
780 ret = __camif_video_try_format(vp, &f->fmt.pix, &fmt);
781 if (ret < 0)
782 return ret;
783
784 vp->out_fmt = fmt;
785 vp->payload = pix->sizeimage;
786 out_frame->f_width = pix->width;
787 out_frame->f_height = pix->height;
788
789 /* Reset composition rectangle */
790 out_frame->rect.width = pix->width;
791 out_frame->rect.height = pix->height;
792 out_frame->rect.left = 0;
793 out_frame->rect.top = 0;
794
795 if (vp->owner == NULL)
796 vp->owner = priv;
797
798 pr_debug("%ux%u. payload: %u. fmt: 0x%08x. %d %d. sizeimage: %d. bpl: %d\n",
799 out_frame->f_width, out_frame->f_height, vp->payload,
800 fmt->fourcc, pix->width * pix->height * fmt->depth,
801 fmt->depth, pix->sizeimage, pix->bytesperline);
802
803 return 0;
804 }
805
806 /* Only check pixel formats at the sensor and the camif subdev pads */
807 static int camif_pipeline_validate(struct camif_dev *camif)
808 {
809 struct v4l2_subdev_format src_fmt;
810 struct media_pad *pad;
811 int ret;
812
813 /* Retrieve format at the sensor subdev source pad */
814 pad = media_entity_remote_pad(&camif->pads[0]);
815 if (!pad || !is_media_entity_v4l2_subdev(pad->entity))
816 return -EPIPE;
817
818 src_fmt.pad = pad->index;
819 src_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
820 ret = v4l2_subdev_call(camif->sensor.sd, pad, get_fmt, NULL, &src_fmt);
821 if (ret < 0 && ret != -ENOIOCTLCMD)
822 return -EPIPE;
823
824 if (src_fmt.format.width != camif->mbus_fmt.width ||
825 src_fmt.format.height != camif->mbus_fmt.height ||
826 src_fmt.format.code != camif->mbus_fmt.code)
827 return -EPIPE;
828
829 return 0;
830 }
831
832 static int s3c_camif_streamon(struct file *file, void *priv,
833 enum v4l2_buf_type type)
834 {
835 struct camif_vp *vp = video_drvdata(file);
836 struct camif_dev *camif = vp->camif;
837 struct media_entity *sensor = &camif->sensor.sd->entity;
838 int ret;
839
840 pr_debug("[vp%d]\n", vp->id);
841
842 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
843 return -EINVAL;
844
845 if (vp->owner && vp->owner != priv)
846 return -EBUSY;
847
848 if (s3c_vp_active(vp))
849 return 0;
850
851 ret = media_pipeline_start(sensor, camif->m_pipeline);
852 if (ret < 0)
853 return ret;
854
855 ret = camif_pipeline_validate(camif);
856 if (ret < 0) {
857 media_pipeline_stop(sensor);
858 return ret;
859 }
860
861 return vb2_streamon(&vp->vb_queue, type);
862 }
863
864 static int s3c_camif_streamoff(struct file *file, void *priv,
865 enum v4l2_buf_type type)
866 {
867 struct camif_vp *vp = video_drvdata(file);
868 struct camif_dev *camif = vp->camif;
869 int ret;
870
871 pr_debug("[vp%d]\n", vp->id);
872
873 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
874 return -EINVAL;
875
876 if (vp->owner && vp->owner != priv)
877 return -EBUSY;
878
879 ret = vb2_streamoff(&vp->vb_queue, type);
880 if (ret == 0)
881 media_pipeline_stop(&camif->sensor.sd->entity);
882 return ret;
883 }
884
885 static int s3c_camif_reqbufs(struct file *file, void *priv,
886 struct v4l2_requestbuffers *rb)
887 {
888 struct camif_vp *vp = video_drvdata(file);
889 int ret;
890
891 pr_debug("[vp%d] rb count: %d, owner: %p, priv: %p\n",
892 vp->id, rb->count, vp->owner, priv);
893
894 if (vp->owner && vp->owner != priv)
895 return -EBUSY;
896
897 if (rb->count)
898 rb->count = max_t(u32, CAMIF_REQ_BUFS_MIN, rb->count);
899 else
900 vp->owner = NULL;
901
902 ret = vb2_reqbufs(&vp->vb_queue, rb);
903 if (ret < 0)
904 return ret;
905
906 if (rb->count && rb->count < CAMIF_REQ_BUFS_MIN) {
907 rb->count = 0;
908 vb2_reqbufs(&vp->vb_queue, rb);
909 ret = -ENOMEM;
910 }
911
912 vp->reqbufs_count = rb->count;
913 if (vp->owner == NULL && rb->count > 0)
914 vp->owner = priv;
915
916 return ret;
917 }
918
919 static int s3c_camif_querybuf(struct file *file, void *priv,
920 struct v4l2_buffer *buf)
921 {
922 struct camif_vp *vp = video_drvdata(file);
923 return vb2_querybuf(&vp->vb_queue, buf);
924 }
925
926 static int s3c_camif_qbuf(struct file *file, void *priv,
927 struct v4l2_buffer *buf)
928 {
929 struct camif_vp *vp = video_drvdata(file);
930
931 pr_debug("[vp%d]\n", vp->id);
932
933 if (vp->owner && vp->owner != priv)
934 return -EBUSY;
935
936 return vb2_qbuf(&vp->vb_queue, vp->vdev.v4l2_dev->mdev, buf);
937 }
938
939 static int s3c_camif_dqbuf(struct file *file, void *priv,
940 struct v4l2_buffer *buf)
941 {
942 struct camif_vp *vp = video_drvdata(file);
943
944 pr_debug("[vp%d] sequence: %d\n", vp->id, vp->frame_sequence);
945
946 if (vp->owner && vp->owner != priv)
947 return -EBUSY;
948
949 return vb2_dqbuf(&vp->vb_queue, buf, file->f_flags & O_NONBLOCK);
950 }
951
952 static int s3c_camif_create_bufs(struct file *file, void *priv,
953 struct v4l2_create_buffers *create)
954 {
955 struct camif_vp *vp = video_drvdata(file);
956 int ret;
957
958 if (vp->owner && vp->owner != priv)
959 return -EBUSY;
960
961 create->count = max_t(u32, 1, create->count);
962 ret = vb2_create_bufs(&vp->vb_queue, create);
963
964 if (!ret && vp->owner == NULL)
965 vp->owner = priv;
966
967 return ret;
968 }
969
970 static int s3c_camif_prepare_buf(struct file *file, void *priv,
971 struct v4l2_buffer *b)
972 {
973 struct camif_vp *vp = video_drvdata(file);
974 return vb2_prepare_buf(&vp->vb_queue, vp->vdev.v4l2_dev->mdev, b);
975 }
976
977 static int s3c_camif_g_selection(struct file *file, void *priv,
978 struct v4l2_selection *sel)
979 {
980 struct camif_vp *vp = video_drvdata(file);
981
982 if (sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
983 return -EINVAL;
984
985 switch (sel->target) {
986 case V4L2_SEL_TGT_COMPOSE_BOUNDS:
987 case V4L2_SEL_TGT_COMPOSE_DEFAULT:
988 sel->r.left = 0;
989 sel->r.top = 0;
990 sel->r.width = vp->out_frame.f_width;
991 sel->r.height = vp->out_frame.f_height;
992 return 0;
993
994 case V4L2_SEL_TGT_COMPOSE:
995 sel->r = vp->out_frame.rect;
996 return 0;
997 }
998
999 return -EINVAL;
1000 }
1001
1002 static void __camif_try_compose(struct camif_dev *camif, struct camif_vp *vp,
1003 struct v4l2_rect *r)
1004 {
1005 /* s3c244x doesn't support composition */
1006 if (camif->variant->ip_revision == S3C244X_CAMIF_IP_REV) {
1007 *r = vp->out_frame.rect;
1008 return;
1009 }
1010
1011 /* TODO: s3c64xx */
1012 }
1013
1014 static int s3c_camif_s_selection(struct file *file, void *priv,
1015 struct v4l2_selection *sel)
1016 {
1017 struct camif_vp *vp = video_drvdata(file);
1018 struct camif_dev *camif = vp->camif;
1019 struct v4l2_rect rect = sel->r;
1020 unsigned long flags;
1021
1022 if (sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1023 sel->target != V4L2_SEL_TGT_COMPOSE)
1024 return -EINVAL;
1025
1026 __camif_try_compose(camif, vp, &rect);
1027
1028 sel->r = rect;
1029 spin_lock_irqsave(&camif->slock, flags);
1030 vp->out_frame.rect = rect;
1031 vp->state |= ST_VP_CONFIG;
1032 spin_unlock_irqrestore(&camif->slock, flags);
1033
1034 pr_debug("type: %#x, target: %#x, flags: %#x, (%d,%d)/%dx%d\n",
1035 sel->type, sel->target, sel->flags,
1036 sel->r.left, sel->r.top, sel->r.width, sel->r.height);
1037
1038 return 0;
1039 }
1040
1041 static const struct v4l2_ioctl_ops s3c_camif_ioctl_ops = {
1042 .vidioc_querycap = s3c_camif_vidioc_querycap,
1043 .vidioc_enum_input = s3c_camif_vidioc_enum_input,
1044 .vidioc_g_input = s3c_camif_vidioc_g_input,
1045 .vidioc_s_input = s3c_camif_vidioc_s_input,
1046 .vidioc_enum_fmt_vid_cap = s3c_camif_vidioc_enum_fmt,
1047 .vidioc_try_fmt_vid_cap = s3c_camif_vidioc_try_fmt,
1048 .vidioc_s_fmt_vid_cap = s3c_camif_vidioc_s_fmt,
1049 .vidioc_g_fmt_vid_cap = s3c_camif_vidioc_g_fmt,
1050 .vidioc_g_selection = s3c_camif_g_selection,
1051 .vidioc_s_selection = s3c_camif_s_selection,
1052 .vidioc_reqbufs = s3c_camif_reqbufs,
1053 .vidioc_querybuf = s3c_camif_querybuf,
1054 .vidioc_prepare_buf = s3c_camif_prepare_buf,
1055 .vidioc_create_bufs = s3c_camif_create_bufs,
1056 .vidioc_qbuf = s3c_camif_qbuf,
1057 .vidioc_dqbuf = s3c_camif_dqbuf,
1058 .vidioc_streamon = s3c_camif_streamon,
1059 .vidioc_streamoff = s3c_camif_streamoff,
1060 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1061 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1062 .vidioc_log_status = v4l2_ctrl_log_status,
1063 };
1064
1065 /*
1066 * Video node controls
1067 */
1068 static int s3c_camif_video_s_ctrl(struct v4l2_ctrl *ctrl)
1069 {
1070 struct camif_vp *vp = ctrl->priv;
1071 struct camif_dev *camif = vp->camif;
1072 unsigned long flags;
1073
1074 pr_debug("[vp%d] ctrl: %s, value: %d\n", vp->id,
1075 ctrl->name, ctrl->val);
1076
1077 spin_lock_irqsave(&camif->slock, flags);
1078
1079 switch (ctrl->id) {
1080 case V4L2_CID_HFLIP:
1081 vp->hflip = ctrl->val;
1082 break;
1083
1084 case V4L2_CID_VFLIP:
1085 vp->vflip = ctrl->val;
1086 break;
1087 }
1088
1089 vp->state |= ST_VP_CONFIG;
1090 spin_unlock_irqrestore(&camif->slock, flags);
1091 return 0;
1092 }
1093
1094 /* Codec and preview video node control ops */
1095 static const struct v4l2_ctrl_ops s3c_camif_video_ctrl_ops = {
1096 .s_ctrl = s3c_camif_video_s_ctrl,
1097 };
1098
1099 int s3c_camif_register_video_node(struct camif_dev *camif, int idx)
1100 {
1101 struct camif_vp *vp = &camif->vp[idx];
1102 struct vb2_queue *q = &vp->vb_queue;
1103 struct video_device *vfd = &vp->vdev;
1104 struct v4l2_ctrl *ctrl;
1105 int ret;
1106
1107 memset(vfd, 0, sizeof(*vfd));
1108 snprintf(vfd->name, sizeof(vfd->name), "camif-%s",
1109 vp->id == 0 ? "codec" : "preview");
1110
1111 vfd->fops = &s3c_camif_fops;
1112 vfd->ioctl_ops = &s3c_camif_ioctl_ops;
1113 vfd->v4l2_dev = &camif->v4l2_dev;
1114 vfd->minor = -1;
1115 vfd->release = video_device_release_empty;
1116 vfd->lock = &camif->lock;
1117 vp->reqbufs_count = 0;
1118
1119 INIT_LIST_HEAD(&vp->pending_buf_q);
1120 INIT_LIST_HEAD(&vp->active_buf_q);
1121
1122 memset(q, 0, sizeof(*q));
1123 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1124 q->io_modes = VB2_MMAP | VB2_USERPTR;
1125 q->ops = &s3c_camif_qops;
1126 q->mem_ops = &vb2_dma_contig_memops;
1127 q->buf_struct_size = sizeof(struct camif_buffer);
1128 q->drv_priv = vp;
1129 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1130 q->lock = &vp->camif->lock;
1131 q->dev = camif->v4l2_dev.dev;
1132
1133 ret = vb2_queue_init(q);
1134 if (ret)
1135 goto err_vd_rel;
1136
1137 vp->pad.flags = MEDIA_PAD_FL_SINK;
1138 ret = media_entity_pads_init(&vfd->entity, 1, &vp->pad);
1139 if (ret)
1140 goto err_vd_rel;
1141
1142 video_set_drvdata(vfd, vp);
1143
1144 v4l2_ctrl_handler_init(&vp->ctrl_handler, 1);
1145 ctrl = v4l2_ctrl_new_std(&vp->ctrl_handler, &s3c_camif_video_ctrl_ops,
1146 V4L2_CID_HFLIP, 0, 1, 1, 0);
1147 if (ctrl)
1148 ctrl->priv = vp;
1149 ctrl = v4l2_ctrl_new_std(&vp->ctrl_handler, &s3c_camif_video_ctrl_ops,
1150 V4L2_CID_VFLIP, 0, 1, 1, 0);
1151 if (ctrl)
1152 ctrl->priv = vp;
1153
1154 ret = vp->ctrl_handler.error;
1155 if (ret < 0)
1156 goto err_me_cleanup;
1157
1158 vfd->ctrl_handler = &vp->ctrl_handler;
1159 vfd->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_CAPTURE;
1160
1161 ret = video_register_device(vfd, VFL_TYPE_VIDEO, -1);
1162 if (ret)
1163 goto err_ctrlh_free;
1164
1165 v4l2_info(&camif->v4l2_dev, "registered %s as /dev/%s\n",
1166 vfd->name, video_device_node_name(vfd));
1167 return 0;
1168
1169 err_ctrlh_free:
1170 v4l2_ctrl_handler_free(&vp->ctrl_handler);
1171 err_me_cleanup:
1172 media_entity_cleanup(&vfd->entity);
1173 err_vd_rel:
1174 video_device_release(vfd);
1175 return ret;
1176 }
1177
1178 void s3c_camif_unregister_video_node(struct camif_dev *camif, int idx)
1179 {
1180 struct video_device *vfd = &camif->vp[idx].vdev;
1181
1182 if (video_is_registered(vfd)) {
1183 video_unregister_device(vfd);
1184 media_entity_cleanup(&vfd->entity);
1185 v4l2_ctrl_handler_free(vfd->ctrl_handler);
1186 }
1187 }
1188
1189 /* Media bus pixel formats supported at the camif input */
1190 static const u32 camif_mbus_formats[] = {
1191 MEDIA_BUS_FMT_YUYV8_2X8,
1192 MEDIA_BUS_FMT_YVYU8_2X8,
1193 MEDIA_BUS_FMT_UYVY8_2X8,
1194 MEDIA_BUS_FMT_VYUY8_2X8,
1195 };
1196
1197 /*
1198 * Camera input interface subdev operations
1199 */
1200
1201 static int s3c_camif_subdev_enum_mbus_code(struct v4l2_subdev *sd,
1202 struct v4l2_subdev_pad_config *cfg,
1203 struct v4l2_subdev_mbus_code_enum *code)
1204 {
1205 if (code->index >= ARRAY_SIZE(camif_mbus_formats))
1206 return -EINVAL;
1207
1208 code->code = camif_mbus_formats[code->index];
1209 return 0;
1210 }
1211
1212 static int s3c_camif_subdev_get_fmt(struct v4l2_subdev *sd,
1213 struct v4l2_subdev_pad_config *cfg,
1214 struct v4l2_subdev_format *fmt)
1215 {
1216 struct camif_dev *camif = v4l2_get_subdevdata(sd);
1217 struct v4l2_mbus_framefmt *mf = &fmt->format;
1218
1219 if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
1220 mf = v4l2_subdev_get_try_format(sd, cfg, fmt->pad);
1221 fmt->format = *mf;
1222 return 0;
1223 }
1224
1225 mutex_lock(&camif->lock);
1226
1227 switch (fmt->pad) {
1228 case CAMIF_SD_PAD_SINK:
1229 /* full camera input pixel size */
1230 *mf = camif->mbus_fmt;
1231 break;
1232
1233 case CAMIF_SD_PAD_SOURCE_C...CAMIF_SD_PAD_SOURCE_P:
1234 /* crop rectangle at camera interface input */
1235 mf->width = camif->camif_crop.width;
1236 mf->height = camif->camif_crop.height;
1237 mf->code = camif->mbus_fmt.code;
1238 break;
1239 }
1240
1241 mutex_unlock(&camif->lock);
1242 mf->field = V4L2_FIELD_NONE;
1243 mf->colorspace = V4L2_COLORSPACE_JPEG;
1244 return 0;
1245 }
1246
1247 static void __camif_subdev_try_format(struct camif_dev *camif,
1248 struct v4l2_mbus_framefmt *mf, int pad)
1249 {
1250 const struct s3c_camif_variant *variant = camif->variant;
1251 const struct vp_pix_limits *pix_lim;
1252 unsigned int i;
1253
1254 /* FIXME: constraints against codec or preview path ? */
1255 pix_lim = &variant->vp_pix_limits[VP_CODEC];
1256
1257 for (i = 0; i < ARRAY_SIZE(camif_mbus_formats); i++)
1258 if (camif_mbus_formats[i] == mf->code)
1259 break;
1260
1261 if (i == ARRAY_SIZE(camif_mbus_formats))
1262 mf->code = camif_mbus_formats[0];
1263
1264 if (pad == CAMIF_SD_PAD_SINK) {
1265 v4l_bound_align_image(&mf->width, 8, CAMIF_MAX_PIX_WIDTH,
1266 ffs(pix_lim->out_width_align) - 1,
1267 &mf->height, 8, CAMIF_MAX_PIX_HEIGHT, 0,
1268 0);
1269 } else {
1270 struct v4l2_rect *crop = &camif->camif_crop;
1271 v4l_bound_align_image(&mf->width, 8, crop->width,
1272 ffs(pix_lim->out_width_align) - 1,
1273 &mf->height, 8, crop->height,
1274 0, 0);
1275 }
1276
1277 v4l2_dbg(1, debug, &camif->subdev, "%ux%u\n", mf->width, mf->height);
1278 }
1279
1280 static int s3c_camif_subdev_set_fmt(struct v4l2_subdev *sd,
1281 struct v4l2_subdev_pad_config *cfg,
1282 struct v4l2_subdev_format *fmt)
1283 {
1284 struct camif_dev *camif = v4l2_get_subdevdata(sd);
1285 struct v4l2_mbus_framefmt *mf = &fmt->format;
1286 struct v4l2_rect *crop = &camif->camif_crop;
1287 int i;
1288
1289 v4l2_dbg(1, debug, sd, "pad%d: code: 0x%x, %ux%u\n",
1290 fmt->pad, mf->code, mf->width, mf->height);
1291
1292 mf->field = V4L2_FIELD_NONE;
1293 mf->colorspace = V4L2_COLORSPACE_JPEG;
1294 mutex_lock(&camif->lock);
1295
1296 /*
1297 * No pixel format change at the camera input is allowed
1298 * while streaming.
1299 */
1300 if (vb2_is_busy(&camif->vp[VP_CODEC].vb_queue) ||
1301 vb2_is_busy(&camif->vp[VP_PREVIEW].vb_queue)) {
1302 mutex_unlock(&camif->lock);
1303 return -EBUSY;
1304 }
1305
1306 __camif_subdev_try_format(camif, mf, fmt->pad);
1307
1308 if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
1309 mf = v4l2_subdev_get_try_format(sd, cfg, fmt->pad);
1310 *mf = fmt->format;
1311 mutex_unlock(&camif->lock);
1312 return 0;
1313 }
1314
1315 switch (fmt->pad) {
1316 case CAMIF_SD_PAD_SINK:
1317 camif->mbus_fmt = *mf;
1318 /* Reset sink crop rectangle. */
1319 crop->width = mf->width;
1320 crop->height = mf->height;
1321 crop->left = 0;
1322 crop->top = 0;
1323 /*
1324 * Reset source format (the camif's crop rectangle)
1325 * and the video output resolution.
1326 */
1327 for (i = 0; i < CAMIF_VP_NUM; i++) {
1328 struct camif_frame *frame = &camif->vp[i].out_frame;
1329 frame->rect = *crop;
1330 frame->f_width = mf->width;
1331 frame->f_height = mf->height;
1332 }
1333 break;
1334
1335 case CAMIF_SD_PAD_SOURCE_C...CAMIF_SD_PAD_SOURCE_P:
1336 /* Pixel format can be only changed on the sink pad. */
1337 mf->code = camif->mbus_fmt.code;
1338 mf->width = crop->width;
1339 mf->height = crop->height;
1340 break;
1341 }
1342
1343 mutex_unlock(&camif->lock);
1344 return 0;
1345 }
1346
1347 static int s3c_camif_subdev_get_selection(struct v4l2_subdev *sd,
1348 struct v4l2_subdev_pad_config *cfg,
1349 struct v4l2_subdev_selection *sel)
1350 {
1351 struct camif_dev *camif = v4l2_get_subdevdata(sd);
1352 struct v4l2_rect *crop = &camif->camif_crop;
1353 struct v4l2_mbus_framefmt *mf = &camif->mbus_fmt;
1354
1355 if ((sel->target != V4L2_SEL_TGT_CROP &&
1356 sel->target != V4L2_SEL_TGT_CROP_BOUNDS) ||
1357 sel->pad != CAMIF_SD_PAD_SINK)
1358 return -EINVAL;
1359
1360 if (sel->which == V4L2_SUBDEV_FORMAT_TRY) {
1361 sel->r = *v4l2_subdev_get_try_crop(sd, cfg, sel->pad);
1362 return 0;
1363 }
1364
1365 mutex_lock(&camif->lock);
1366
1367 if (sel->target == V4L2_SEL_TGT_CROP) {
1368 sel->r = *crop;
1369 } else { /* crop bounds */
1370 sel->r.width = mf->width;
1371 sel->r.height = mf->height;
1372 sel->r.left = 0;
1373 sel->r.top = 0;
1374 }
1375
1376 mutex_unlock(&camif->lock);
1377
1378 v4l2_dbg(1, debug, sd, "%s: crop: (%d,%d) %dx%d, size: %ux%u\n",
1379 __func__, crop->left, crop->top, crop->width,
1380 crop->height, mf->width, mf->height);
1381
1382 return 0;
1383 }
1384
1385 static void __camif_try_crop(struct camif_dev *camif, struct v4l2_rect *r)
1386 {
1387 struct v4l2_mbus_framefmt *mf = &camif->mbus_fmt;
1388 const struct camif_pix_limits *pix_lim = &camif->variant->pix_limits;
1389 unsigned int left = 2 * r->left;
1390 unsigned int top = 2 * r->top;
1391
1392 /*
1393 * Following constraints must be met:
1394 * - r->width + 2 * r->left = mf->width;
1395 * - r->height + 2 * r->top = mf->height;
1396 * - crop rectangle size and position must be aligned
1397 * to 8 or 2 pixels, depending on SoC version.
1398 */
1399 v4l_bound_align_image(&r->width, 0, mf->width,
1400 ffs(pix_lim->win_hor_offset_align) - 1,
1401 &r->height, 0, mf->height, 1, 0);
1402
1403 v4l_bound_align_image(&left, 0, mf->width - r->width,
1404 ffs(pix_lim->win_hor_offset_align),
1405 &top, 0, mf->height - r->height, 2, 0);
1406
1407 r->left = left / 2;
1408 r->top = top / 2;
1409 r->width = mf->width - left;
1410 r->height = mf->height - top;
1411 /*
1412 * Make sure we either downscale or upscale both the pixel
1413 * width and height. Just return current crop rectangle if
1414 * this scaler constraint is not met.
1415 */
1416 if (camif->variant->ip_revision == S3C244X_CAMIF_IP_REV &&
1417 camif_is_streaming(camif)) {
1418 unsigned int i;
1419
1420 for (i = 0; i < CAMIF_VP_NUM; i++) {
1421 struct v4l2_rect *or = &camif->vp[i].out_frame.rect;
1422 if ((or->width > r->width) == (or->height > r->height))
1423 continue;
1424 *r = camif->camif_crop;
1425 pr_debug("Width/height scaling direction limitation\n");
1426 break;
1427 }
1428 }
1429
1430 v4l2_dbg(1, debug, &camif->v4l2_dev, "crop: (%d,%d)/%dx%d, fmt: %ux%u\n",
1431 r->left, r->top, r->width, r->height, mf->width, mf->height);
1432 }
1433
1434 static int s3c_camif_subdev_set_selection(struct v4l2_subdev *sd,
1435 struct v4l2_subdev_pad_config *cfg,
1436 struct v4l2_subdev_selection *sel)
1437 {
1438 struct camif_dev *camif = v4l2_get_subdevdata(sd);
1439 struct v4l2_rect *crop = &camif->camif_crop;
1440 struct camif_scaler scaler;
1441
1442 if (sel->target != V4L2_SEL_TGT_CROP || sel->pad != CAMIF_SD_PAD_SINK)
1443 return -EINVAL;
1444
1445 mutex_lock(&camif->lock);
1446 __camif_try_crop(camif, &sel->r);
1447
1448 if (sel->which == V4L2_SUBDEV_FORMAT_TRY) {
1449 *v4l2_subdev_get_try_crop(sd, cfg, sel->pad) = sel->r;
1450 } else {
1451 unsigned long flags;
1452 unsigned int i;
1453
1454 spin_lock_irqsave(&camif->slock, flags);
1455 *crop = sel->r;
1456
1457 for (i = 0; i < CAMIF_VP_NUM; i++) {
1458 struct camif_vp *vp = &camif->vp[i];
1459 scaler = vp->scaler;
1460 if (s3c_camif_get_scaler_config(vp, &scaler))
1461 continue;
1462 vp->scaler = scaler;
1463 vp->state |= ST_VP_CONFIG;
1464 }
1465
1466 spin_unlock_irqrestore(&camif->slock, flags);
1467 }
1468 mutex_unlock(&camif->lock);
1469
1470 v4l2_dbg(1, debug, sd, "%s: (%d,%d) %dx%d, f_w: %u, f_h: %u\n",
1471 __func__, crop->left, crop->top, crop->width, crop->height,
1472 camif->mbus_fmt.width, camif->mbus_fmt.height);
1473
1474 return 0;
1475 }
1476
1477 static const struct v4l2_subdev_pad_ops s3c_camif_subdev_pad_ops = {
1478 .enum_mbus_code = s3c_camif_subdev_enum_mbus_code,
1479 .get_selection = s3c_camif_subdev_get_selection,
1480 .set_selection = s3c_camif_subdev_set_selection,
1481 .get_fmt = s3c_camif_subdev_get_fmt,
1482 .set_fmt = s3c_camif_subdev_set_fmt,
1483 };
1484
1485 static const struct v4l2_subdev_ops s3c_camif_subdev_ops = {
1486 .pad = &s3c_camif_subdev_pad_ops,
1487 };
1488
1489 static int s3c_camif_subdev_s_ctrl(struct v4l2_ctrl *ctrl)
1490 {
1491 struct camif_dev *camif = container_of(ctrl->handler, struct camif_dev,
1492 ctrl_handler);
1493 unsigned long flags;
1494
1495 spin_lock_irqsave(&camif->slock, flags);
1496
1497 switch (ctrl->id) {
1498 case V4L2_CID_COLORFX:
1499 camif->colorfx = camif->ctrl_colorfx->val;
1500 /* Set Cb, Cr */
1501 switch (ctrl->val) {
1502 case V4L2_COLORFX_SEPIA:
1503 camif->colorfx_cb = 115;
1504 camif->colorfx_cr = 145;
1505 break;
1506 case V4L2_COLORFX_SET_CBCR:
1507 camif->colorfx_cb = camif->ctrl_colorfx_cbcr->val >> 8;
1508 camif->colorfx_cr = camif->ctrl_colorfx_cbcr->val & 0xff;
1509 break;
1510 default:
1511 /* for V4L2_COLORFX_BW and others */
1512 camif->colorfx_cb = 128;
1513 camif->colorfx_cr = 128;
1514 }
1515 break;
1516 case V4L2_CID_TEST_PATTERN:
1517 camif->test_pattern = camif->ctrl_test_pattern->val;
1518 break;
1519 default:
1520 WARN_ON(1);
1521 }
1522
1523 camif->vp[VP_CODEC].state |= ST_VP_CONFIG;
1524 camif->vp[VP_PREVIEW].state |= ST_VP_CONFIG;
1525 spin_unlock_irqrestore(&camif->slock, flags);
1526
1527 return 0;
1528 }
1529
1530 static const struct v4l2_ctrl_ops s3c_camif_subdev_ctrl_ops = {
1531 .s_ctrl = s3c_camif_subdev_s_ctrl,
1532 };
1533
1534 static const char * const s3c_camif_test_pattern_menu[] = {
1535 "Disabled",
1536 "Color bars",
1537 "Horizontal increment",
1538 "Vertical increment",
1539 };
1540
1541 int s3c_camif_create_subdev(struct camif_dev *camif)
1542 {
1543 struct v4l2_ctrl_handler *handler = &camif->ctrl_handler;
1544 struct v4l2_subdev *sd = &camif->subdev;
1545 int ret;
1546
1547 v4l2_subdev_init(sd, &s3c_camif_subdev_ops);
1548 sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
1549 strscpy(sd->name, "S3C-CAMIF", sizeof(sd->name));
1550
1551 camif->pads[CAMIF_SD_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
1552 camif->pads[CAMIF_SD_PAD_SOURCE_C].flags = MEDIA_PAD_FL_SOURCE;
1553 camif->pads[CAMIF_SD_PAD_SOURCE_P].flags = MEDIA_PAD_FL_SOURCE;
1554
1555 ret = media_entity_pads_init(&sd->entity, CAMIF_SD_PADS_NUM,
1556 camif->pads);
1557 if (ret)
1558 return ret;
1559
1560 v4l2_ctrl_handler_init(handler, 3);
1561 camif->ctrl_test_pattern = v4l2_ctrl_new_std_menu_items(handler,
1562 &s3c_camif_subdev_ctrl_ops, V4L2_CID_TEST_PATTERN,
1563 ARRAY_SIZE(s3c_camif_test_pattern_menu) - 1, 0, 0,
1564 s3c_camif_test_pattern_menu);
1565
1566 if (camif->variant->has_img_effect) {
1567 camif->ctrl_colorfx = v4l2_ctrl_new_std_menu(handler,
1568 &s3c_camif_subdev_ctrl_ops,
1569 V4L2_CID_COLORFX, V4L2_COLORFX_SET_CBCR,
1570 ~0x981f, V4L2_COLORFX_NONE);
1571
1572 camif->ctrl_colorfx_cbcr = v4l2_ctrl_new_std(handler,
1573 &s3c_camif_subdev_ctrl_ops,
1574 V4L2_CID_COLORFX_CBCR, 0, 0xffff, 1, 0);
1575 }
1576
1577 if (handler->error) {
1578 v4l2_ctrl_handler_free(handler);
1579 media_entity_cleanup(&sd->entity);
1580 return handler->error;
1581 }
1582
1583 if (camif->variant->has_img_effect)
1584 v4l2_ctrl_auto_cluster(2, &camif->ctrl_colorfx,
1585 V4L2_COLORFX_SET_CBCR, false);
1586
1587 sd->ctrl_handler = handler;
1588 v4l2_set_subdevdata(sd, camif);
1589
1590 return 0;
1591 }
1592
1593 void s3c_camif_unregister_subdev(struct camif_dev *camif)
1594 {
1595 struct v4l2_subdev *sd = &camif->subdev;
1596
1597 /* Return if not registered */
1598 if (v4l2_get_subdevdata(sd) == NULL)
1599 return;
1600
1601 v4l2_device_unregister_subdev(sd);
1602 media_entity_cleanup(&sd->entity);
1603 v4l2_ctrl_handler_free(&camif->ctrl_handler);
1604 v4l2_set_subdevdata(sd, NULL);
1605 }
1606
1607 int s3c_camif_set_defaults(struct camif_dev *camif)
1608 {
1609 unsigned int ip_rev = camif->variant->ip_revision;
1610 int i;
1611
1612 for (i = 0; i < CAMIF_VP_NUM; i++) {
1613 struct camif_vp *vp = &camif->vp[i];
1614 struct camif_frame *f = &vp->out_frame;
1615
1616 vp->camif = camif;
1617 vp->id = i;
1618 vp->offset = camif->variant->vp_offset;
1619
1620 if (ip_rev == S3C244X_CAMIF_IP_REV)
1621 vp->fmt_flags = i ? FMT_FL_S3C24XX_PREVIEW :
1622 FMT_FL_S3C24XX_CODEC;
1623 else
1624 vp->fmt_flags = FMT_FL_S3C64XX;
1625
1626 vp->out_fmt = s3c_camif_find_format(vp, NULL, 0);
1627 BUG_ON(vp->out_fmt == NULL);
1628
1629 memset(f, 0, sizeof(*f));
1630 f->f_width = CAMIF_DEF_WIDTH;
1631 f->f_height = CAMIF_DEF_HEIGHT;
1632 f->rect.width = CAMIF_DEF_WIDTH;
1633 f->rect.height = CAMIF_DEF_HEIGHT;
1634
1635 /* Scaler is always enabled */
1636 vp->scaler.enable = 1;
1637
1638 vp->payload = (f->f_width * f->f_height *
1639 vp->out_fmt->depth) / 8;
1640 }
1641
1642 memset(&camif->mbus_fmt, 0, sizeof(camif->mbus_fmt));
1643 camif->mbus_fmt.width = CAMIF_DEF_WIDTH;
1644 camif->mbus_fmt.height = CAMIF_DEF_HEIGHT;
1645 camif->mbus_fmt.code = camif_mbus_formats[0];
1646
1647 memset(&camif->camif_crop, 0, sizeof(camif->camif_crop));
1648 camif->camif_crop.width = CAMIF_DEF_WIDTH;
1649 camif->camif_crop.height = CAMIF_DEF_HEIGHT;
1650
1651 return 0;
1652 }
Linux with added FPC-III support