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[media] media: s3c-camif: use vb2_ops_wait_prepare/finish helper
[deliverable/linux.git] / drivers / media / platform / s3c-camif / camif-capture.c
1 /*
2 * s3c24xx/s3c64xx SoC series Camera Interface (CAMIF) driver
3 *
4 * Copyright (C) 2012 Sylwester Nawrocki <sylvester.nawrocki@gmail.com>
5 * Copyright (C) 2012 Tomasz Figa <tomasz.figa@gmail.com>
6 *
7 * Based on drivers/media/platform/s5p-fimc,
8 * Copyright (C) 2010 - 2012 Samsung Electronics Co., Ltd.
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 */
14 #define pr_fmt(fmt) "%s:%d " fmt, __func__, __LINE__
15
16 #include <linux/bug.h>
17 #include <linux/clk.h>
18 #include <linux/device.h>
19 #include <linux/errno.h>
20 #include <linux/i2c.h>
21 #include <linux/interrupt.h>
22 #include <linux/io.h>
23 #include <linux/kernel.h>
24 #include <linux/list.h>
25 #include <linux/module.h>
26 #include <linux/platform_device.h>
27 #include <linux/pm_runtime.h>
28 #include <linux/ratelimit.h>
29 #include <linux/slab.h>
30 #include <linux/types.h>
31 #include <linux/videodev2.h>
32
33 #include <media/media-device.h>
34 #include <media/v4l2-ctrls.h>
35 #include <media/v4l2-event.h>
36 #include <media/v4l2-ioctl.h>
37 #include <media/videobuf2-core.h>
38 #include <media/videobuf2-dma-contig.h>
39
40 #include "camif-core.h"
41 #include "camif-regs.h"
42
43 static int debug;
44 module_param(debug, int, 0644);
45
46 /* Locking: called with vp->camif->slock spinlock held */
47 static void camif_cfg_video_path(struct camif_vp *vp)
48 {
49 WARN_ON(s3c_camif_get_scaler_config(vp, &vp->scaler));
50 camif_hw_set_scaler(vp);
51 camif_hw_set_flip(vp);
52 camif_hw_set_target_format(vp);
53 camif_hw_set_output_dma(vp);
54 }
55
56 static void camif_prepare_dma_offset(struct camif_vp *vp)
57 {
58 struct camif_frame *f = &vp->out_frame;
59
60 f->dma_offset.initial = f->rect.top * f->f_width + f->rect.left;
61 f->dma_offset.line = f->f_width - (f->rect.left + f->rect.width);
62
63 pr_debug("dma_offset: initial: %d, line: %d\n",
64 f->dma_offset.initial, f->dma_offset.line);
65 }
66
67 /* Locking: called with camif->slock spinlock held */
68 static int s3c_camif_hw_init(struct camif_dev *camif, struct camif_vp *vp)
69 {
70 const struct s3c_camif_variant *variant = camif->variant;
71
72 if (camif->sensor.sd == NULL || vp->out_fmt == NULL)
73 return -EINVAL;
74
75 if (variant->ip_revision == S3C244X_CAMIF_IP_REV)
76 camif_hw_clear_fifo_overflow(vp);
77 camif_hw_set_camera_bus(camif);
78 camif_hw_set_source_format(camif);
79 camif_hw_set_camera_crop(camif);
80 camif_hw_set_test_pattern(camif, camif->test_pattern);
81 if (variant->has_img_effect)
82 camif_hw_set_effect(camif, camif->colorfx,
83 camif->colorfx_cb, camif->colorfx_cr);
84 if (variant->ip_revision == S3C6410_CAMIF_IP_REV)
85 camif_hw_set_input_path(vp);
86 camif_cfg_video_path(vp);
87 vp->state &= ~ST_VP_CONFIG;
88
89 return 0;
90 }
91
92 /*
93 * Initialize the video path, only up from the scaler stage. The camera
94 * input interface set up is skipped. This is useful to enable one of the
95 * video paths when the other is already running.
96 * Locking: called with camif->slock spinlock held.
97 */
98 static int s3c_camif_hw_vp_init(struct camif_dev *camif, struct camif_vp *vp)
99 {
100 unsigned int ip_rev = camif->variant->ip_revision;
101
102 if (vp->out_fmt == NULL)
103 return -EINVAL;
104
105 camif_prepare_dma_offset(vp);
106 if (ip_rev == S3C244X_CAMIF_IP_REV)
107 camif_hw_clear_fifo_overflow(vp);
108 camif_cfg_video_path(vp);
109 vp->state &= ~ST_VP_CONFIG;
110 return 0;
111 }
112
113 static int sensor_set_power(struct camif_dev *camif, int on)
114 {
115 struct cam_sensor *sensor = &camif->sensor;
116 int err = 0;
117
118 if (!on == camif->sensor.power_count)
119 err = v4l2_subdev_call(sensor->sd, core, s_power, on);
120 if (!err)
121 sensor->power_count += on ? 1 : -1;
122
123 pr_debug("on: %d, power_count: %d, err: %d\n",
124 on, sensor->power_count, err);
125
126 return err;
127 }
128
129 static int sensor_set_streaming(struct camif_dev *camif, int on)
130 {
131 struct cam_sensor *sensor = &camif->sensor;
132 int err = 0;
133
134 if (!on == camif->sensor.stream_count)
135 err = v4l2_subdev_call(sensor->sd, video, s_stream, on);
136 if (!err)
137 sensor->stream_count += on ? 1 : -1;
138
139 pr_debug("on: %d, stream_count: %d, err: %d\n",
140 on, sensor->stream_count, err);
141
142 return err;
143 }
144
145 /*
146 * Reinitialize the driver so it is ready to start streaming again.
147 * Return any buffers to vb2, perform CAMIF software reset and
148 * turn off streaming at the data pipeline (sensor) if required.
149 */
150 static int camif_reinitialize(struct camif_vp *vp)
151 {
152 struct camif_dev *camif = vp->camif;
153 struct camif_buffer *buf;
154 unsigned long flags;
155 bool streaming;
156
157 spin_lock_irqsave(&camif->slock, flags);
158 streaming = vp->state & ST_VP_SENSOR_STREAMING;
159
160 vp->state &= ~(ST_VP_PENDING | ST_VP_RUNNING | ST_VP_OFF |
161 ST_VP_ABORTING | ST_VP_STREAMING |
162 ST_VP_SENSOR_STREAMING | ST_VP_LASTIRQ);
163
164 /* Release unused buffers */
165 while (!list_empty(&vp->pending_buf_q)) {
166 buf = camif_pending_queue_pop(vp);
167 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
168 }
169
170 while (!list_empty(&vp->active_buf_q)) {
171 buf = camif_active_queue_pop(vp);
172 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
173 }
174
175 spin_unlock_irqrestore(&camif->slock, flags);
176
177 if (!streaming)
178 return 0;
179
180 return sensor_set_streaming(camif, 0);
181 }
182
183 static bool s3c_vp_active(struct camif_vp *vp)
184 {
185 struct camif_dev *camif = vp->camif;
186 unsigned long flags;
187 bool ret;
188
189 spin_lock_irqsave(&camif->slock, flags);
190 ret = (vp->state & ST_VP_RUNNING) || (vp->state & ST_VP_PENDING);
191 spin_unlock_irqrestore(&camif->slock, flags);
192
193 return ret;
194 }
195
196 static bool camif_is_streaming(struct camif_dev *camif)
197 {
198 unsigned long flags;
199 bool status;
200
201 spin_lock_irqsave(&camif->slock, flags);
202 status = camif->stream_count > 0;
203 spin_unlock_irqrestore(&camif->slock, flags);
204
205 return status;
206 }
207
208 static int camif_stop_capture(struct camif_vp *vp)
209 {
210 struct camif_dev *camif = vp->camif;
211 unsigned long flags;
212 int ret;
213
214 if (!s3c_vp_active(vp))
215 return 0;
216
217 spin_lock_irqsave(&camif->slock, flags);
218 vp->state &= ~(ST_VP_OFF | ST_VP_LASTIRQ);
219 vp->state |= ST_VP_ABORTING;
220 spin_unlock_irqrestore(&camif->slock, flags);
221
222 ret = wait_event_timeout(vp->irq_queue,
223 !(vp->state & ST_VP_ABORTING),
224 msecs_to_jiffies(CAMIF_STOP_TIMEOUT));
225
226 spin_lock_irqsave(&camif->slock, flags);
227
228 if (ret == 0 && !(vp->state & ST_VP_OFF)) {
229 /* Timed out, forcibly stop capture */
230 vp->state &= ~(ST_VP_OFF | ST_VP_ABORTING |
231 ST_VP_LASTIRQ);
232
233 camif_hw_disable_capture(vp);
234 camif_hw_enable_scaler(vp, false);
235 }
236
237 spin_unlock_irqrestore(&camif->slock, flags);
238
239 return camif_reinitialize(vp);
240 }
241
242 static int camif_prepare_addr(struct camif_vp *vp, struct vb2_buffer *vb,
243 struct camif_addr *paddr)
244 {
245 struct camif_frame *frame = &vp->out_frame;
246 u32 pix_size;
247
248 if (vb == NULL || frame == NULL)
249 return -EINVAL;
250
251 pix_size = frame->rect.width * frame->rect.height;
252
253 pr_debug("colplanes: %d, pix_size: %u\n",
254 vp->out_fmt->colplanes, pix_size);
255
256 paddr->y = vb2_dma_contig_plane_dma_addr(vb, 0);
257
258 switch (vp->out_fmt->colplanes) {
259 case 1:
260 paddr->cb = 0;
261 paddr->cr = 0;
262 break;
263 case 2:
264 /* decompose Y into Y/Cb */
265 paddr->cb = (u32)(paddr->y + pix_size);
266 paddr->cr = 0;
267 break;
268 case 3:
269 paddr->cb = (u32)(paddr->y + pix_size);
270 /* decompose Y into Y/Cb/Cr */
271 if (vp->out_fmt->color == IMG_FMT_YCBCR422P)
272 paddr->cr = (u32)(paddr->cb + (pix_size >> 1));
273 else /* 420 */
274 paddr->cr = (u32)(paddr->cb + (pix_size >> 2));
275
276 if (vp->out_fmt->color == IMG_FMT_YCRCB420)
277 swap(paddr->cb, paddr->cr);
278 break;
279 default:
280 return -EINVAL;
281 }
282
283 pr_debug("DMA address: y: %pad cb: %pad cr: %pad\n",
284 &paddr->y, &paddr->cb, &paddr->cr);
285
286 return 0;
287 }
288
289 irqreturn_t s3c_camif_irq_handler(int irq, void *priv)
290 {
291 struct camif_vp *vp = priv;
292 struct camif_dev *camif = vp->camif;
293 unsigned int ip_rev = camif->variant->ip_revision;
294 unsigned int status;
295
296 spin_lock(&camif->slock);
297
298 if (ip_rev == S3C6410_CAMIF_IP_REV)
299 camif_hw_clear_pending_irq(vp);
300
301 status = camif_hw_get_status(vp);
302
303 if (ip_rev == S3C244X_CAMIF_IP_REV && (status & CISTATUS_OVF_MASK)) {
304 camif_hw_clear_fifo_overflow(vp);
305 goto unlock;
306 }
307
308 if (vp->state & ST_VP_ABORTING) {
309 if (vp->state & ST_VP_OFF) {
310 /* Last IRQ */
311 vp->state &= ~(ST_VP_OFF | ST_VP_ABORTING |
312 ST_VP_LASTIRQ);
313 wake_up(&vp->irq_queue);
314 goto unlock;
315 } else if (vp->state & ST_VP_LASTIRQ) {
316 camif_hw_disable_capture(vp);
317 camif_hw_enable_scaler(vp, false);
318 camif_hw_set_lastirq(vp, false);
319 vp->state |= ST_VP_OFF;
320 } else {
321 /* Disable capture, enable last IRQ */
322 camif_hw_set_lastirq(vp, true);
323 vp->state |= ST_VP_LASTIRQ;
324 }
325 }
326
327 if (!list_empty(&vp->pending_buf_q) && (vp->state & ST_VP_RUNNING) &&
328 !list_empty(&vp->active_buf_q)) {
329 unsigned int index;
330 struct camif_buffer *vbuf;
331 struct timeval *tv;
332 struct timespec ts;
333 /*
334 * Get previous DMA write buffer index:
335 * 0 => DMA buffer 0, 2;
336 * 1 => DMA buffer 1, 3.
337 */
338 index = (CISTATUS_FRAMECNT(status) + 2) & 1;
339
340 ktime_get_ts(&ts);
341 vbuf = camif_active_queue_peek(vp, index);
342
343 if (!WARN_ON(vbuf == NULL)) {
344 /* Dequeue a filled buffer */
345 tv = &vbuf->vb.v4l2_buf.timestamp;
346 tv->tv_sec = ts.tv_sec;
347 tv->tv_usec = ts.tv_nsec / NSEC_PER_USEC;
348 vbuf->vb.v4l2_buf.sequence = vp->frame_sequence++;
349 vb2_buffer_done(&vbuf->vb, VB2_BUF_STATE_DONE);
350
351 /* Set up an empty buffer at the DMA engine */
352 vbuf = camif_pending_queue_pop(vp);
353 vbuf->index = index;
354 camif_hw_set_output_addr(vp, &vbuf->paddr, index);
355 camif_hw_set_output_addr(vp, &vbuf->paddr, index + 2);
356
357 /* Scheduled in H/W, add to the queue */
358 camif_active_queue_add(vp, vbuf);
359 }
360 } else if (!(vp->state & ST_VP_ABORTING) &&
361 (vp->state & ST_VP_PENDING)) {
362 vp->state |= ST_VP_RUNNING;
363 }
364
365 if (vp->state & ST_VP_CONFIG) {
366 camif_prepare_dma_offset(vp);
367 camif_hw_set_camera_crop(camif);
368 camif_hw_set_scaler(vp);
369 camif_hw_set_flip(vp);
370 camif_hw_set_test_pattern(camif, camif->test_pattern);
371 if (camif->variant->has_img_effect)
372 camif_hw_set_effect(camif, camif->colorfx,
373 camif->colorfx_cb, camif->colorfx_cr);
374 vp->state &= ~ST_VP_CONFIG;
375 }
376 unlock:
377 spin_unlock(&camif->slock);
378 return IRQ_HANDLED;
379 }
380
381 static int start_streaming(struct vb2_queue *vq, unsigned int count)
382 {
383 struct camif_vp *vp = vb2_get_drv_priv(vq);
384 struct camif_dev *camif = vp->camif;
385 unsigned long flags;
386 int ret;
387
388 /*
389 * We assume the codec capture path is always activated
390 * first, before the preview path starts streaming.
391 * This is required to avoid internal FIFO overflow and
392 * a need for CAMIF software reset.
393 */
394 spin_lock_irqsave(&camif->slock, flags);
395
396 if (camif->stream_count == 0) {
397 camif_hw_reset(camif);
398 ret = s3c_camif_hw_init(camif, vp);
399 } else {
400 ret = s3c_camif_hw_vp_init(camif, vp);
401 }
402 spin_unlock_irqrestore(&camif->slock, flags);
403
404 if (ret < 0) {
405 camif_reinitialize(vp);
406 return ret;
407 }
408
409 spin_lock_irqsave(&camif->slock, flags);
410 vp->frame_sequence = 0;
411 vp->state |= ST_VP_PENDING;
412
413 if (!list_empty(&vp->pending_buf_q) &&
414 (!(vp->state & ST_VP_STREAMING) ||
415 !(vp->state & ST_VP_SENSOR_STREAMING))) {
416
417 camif_hw_enable_scaler(vp, vp->scaler.enable);
418 camif_hw_enable_capture(vp);
419 vp->state |= ST_VP_STREAMING;
420
421 if (!(vp->state & ST_VP_SENSOR_STREAMING)) {
422 vp->state |= ST_VP_SENSOR_STREAMING;
423 spin_unlock_irqrestore(&camif->slock, flags);
424 ret = sensor_set_streaming(camif, 1);
425 if (ret)
426 v4l2_err(&vp->vdev, "Sensor s_stream failed\n");
427 if (debug)
428 camif_hw_dump_regs(camif, __func__);
429
430 return ret;
431 }
432 }
433
434 spin_unlock_irqrestore(&camif->slock, flags);
435 return 0;
436 }
437
438 static void stop_streaming(struct vb2_queue *vq)
439 {
440 struct camif_vp *vp = vb2_get_drv_priv(vq);
441 camif_stop_capture(vp);
442 }
443
444 static int queue_setup(struct vb2_queue *vq, const struct v4l2_format *pfmt,
445 unsigned int *num_buffers, unsigned int *num_planes,
446 unsigned int sizes[], void *allocators[])
447 {
448 const struct v4l2_pix_format *pix = NULL;
449 struct camif_vp *vp = vb2_get_drv_priv(vq);
450 struct camif_dev *camif = vp->camif;
451 struct camif_frame *frame = &vp->out_frame;
452 const struct camif_fmt *fmt = vp->out_fmt;
453 unsigned int size;
454
455 if (pfmt) {
456 pix = &pfmt->fmt.pix;
457 fmt = s3c_camif_find_format(vp, &pix->pixelformat, -1);
458 size = (pix->width * pix->height * fmt->depth) / 8;
459 } else {
460 size = (frame->f_width * frame->f_height * fmt->depth) / 8;
461 }
462
463 if (fmt == NULL)
464 return -EINVAL;
465 *num_planes = 1;
466
467 if (pix)
468 sizes[0] = max(size, pix->sizeimage);
469 else
470 sizes[0] = size;
471 allocators[0] = camif->alloc_ctx;
472
473 pr_debug("size: %u\n", sizes[0]);
474 return 0;
475 }
476
477 static int buffer_prepare(struct vb2_buffer *vb)
478 {
479 struct camif_vp *vp = vb2_get_drv_priv(vb->vb2_queue);
480
481 if (vp->out_fmt == NULL)
482 return -EINVAL;
483
484 if (vb2_plane_size(vb, 0) < vp->payload) {
485 v4l2_err(&vp->vdev, "buffer too small: %lu, required: %u\n",
486 vb2_plane_size(vb, 0), vp->payload);
487 return -EINVAL;
488 }
489 vb2_set_plane_payload(vb, 0, vp->payload);
490
491 return 0;
492 }
493
494 static void buffer_queue(struct vb2_buffer *vb)
495 {
496 struct camif_buffer *buf = container_of(vb, struct camif_buffer, vb);
497 struct camif_vp *vp = vb2_get_drv_priv(vb->vb2_queue);
498 struct camif_dev *camif = vp->camif;
499 unsigned long flags;
500
501 spin_lock_irqsave(&camif->slock, flags);
502 WARN_ON(camif_prepare_addr(vp, &buf->vb, &buf->paddr));
503
504 if (!(vp->state & ST_VP_STREAMING) && vp->active_buffers < 2) {
505 /* Schedule an empty buffer in H/W */
506 buf->index = vp->buf_index;
507
508 camif_hw_set_output_addr(vp, &buf->paddr, buf->index);
509 camif_hw_set_output_addr(vp, &buf->paddr, buf->index + 2);
510
511 camif_active_queue_add(vp, buf);
512 vp->buf_index = !vp->buf_index;
513 } else {
514 camif_pending_queue_add(vp, buf);
515 }
516
517 if (vb2_is_streaming(&vp->vb_queue) && !list_empty(&vp->pending_buf_q)
518 && !(vp->state & ST_VP_STREAMING)) {
519
520 vp->state |= ST_VP_STREAMING;
521 camif_hw_enable_scaler(vp, vp->scaler.enable);
522 camif_hw_enable_capture(vp);
523 spin_unlock_irqrestore(&camif->slock, flags);
524
525 if (!(vp->state & ST_VP_SENSOR_STREAMING)) {
526 if (sensor_set_streaming(camif, 1) == 0)
527 vp->state |= ST_VP_SENSOR_STREAMING;
528 else
529 v4l2_err(&vp->vdev, "Sensor s_stream failed\n");
530
531 if (debug)
532 camif_hw_dump_regs(camif, __func__);
533 }
534 return;
535 }
536 spin_unlock_irqrestore(&camif->slock, flags);
537 }
538
539 static const struct vb2_ops s3c_camif_qops = {
540 .queue_setup = queue_setup,
541 .buf_prepare = buffer_prepare,
542 .buf_queue = buffer_queue,
543 .wait_prepare = vb2_ops_wait_prepare,
544 .wait_finish = vb2_ops_wait_finish,
545 .start_streaming = start_streaming,
546 .stop_streaming = stop_streaming,
547 };
548
549 static int s3c_camif_open(struct file *file)
550 {
551 struct camif_vp *vp = video_drvdata(file);
552 struct camif_dev *camif = vp->camif;
553 int ret;
554
555 pr_debug("[vp%d] state: %#x, owner: %p, pid: %d\n", vp->id,
556 vp->state, vp->owner, task_pid_nr(current));
557
558 if (mutex_lock_interruptible(&camif->lock))
559 return -ERESTARTSYS;
560
561 ret = v4l2_fh_open(file);
562 if (ret < 0)
563 goto unlock;
564
565 ret = pm_runtime_get_sync(camif->dev);
566 if (ret < 0)
567 goto err_pm;
568
569 ret = sensor_set_power(camif, 1);
570 if (!ret)
571 goto unlock;
572
573 pm_runtime_put(camif->dev);
574 err_pm:
575 v4l2_fh_release(file);
576 unlock:
577 mutex_unlock(&camif->lock);
578 return ret;
579 }
580
581 static int s3c_camif_close(struct file *file)
582 {
583 struct camif_vp *vp = video_drvdata(file);
584 struct camif_dev *camif = vp->camif;
585 int ret;
586
587 pr_debug("[vp%d] state: %#x, owner: %p, pid: %d\n", vp->id,
588 vp->state, vp->owner, task_pid_nr(current));
589
590 mutex_lock(&camif->lock);
591
592 if (vp->owner == file->private_data) {
593 camif_stop_capture(vp);
594 vb2_queue_release(&vp->vb_queue);
595 vp->owner = NULL;
596 }
597
598 sensor_set_power(camif, 0);
599
600 pm_runtime_put(camif->dev);
601 ret = v4l2_fh_release(file);
602
603 mutex_unlock(&camif->lock);
604 return ret;
605 }
606
607 static unsigned int s3c_camif_poll(struct file *file,
608 struct poll_table_struct *wait)
609 {
610 struct camif_vp *vp = video_drvdata(file);
611 struct camif_dev *camif = vp->camif;
612 int ret;
613
614 mutex_lock(&camif->lock);
615 if (vp->owner && vp->owner != file->private_data)
616 ret = -EBUSY;
617 else
618 ret = vb2_poll(&vp->vb_queue, file, wait);
619
620 mutex_unlock(&camif->lock);
621 return ret;
622 }
623
624 static int s3c_camif_mmap(struct file *file, struct vm_area_struct *vma)
625 {
626 struct camif_vp *vp = video_drvdata(file);
627 int ret;
628
629 if (vp->owner && vp->owner != file->private_data)
630 ret = -EBUSY;
631 else
632 ret = vb2_mmap(&vp->vb_queue, vma);
633
634 return ret;
635 }
636
637 static const struct v4l2_file_operations s3c_camif_fops = {
638 .owner = THIS_MODULE,
639 .open = s3c_camif_open,
640 .release = s3c_camif_close,
641 .poll = s3c_camif_poll,
642 .unlocked_ioctl = video_ioctl2,
643 .mmap = s3c_camif_mmap,
644 };
645
646 /*
647 * Video node IOCTLs
648 */
649
650 static int s3c_camif_vidioc_querycap(struct file *file, void *priv,
651 struct v4l2_capability *cap)
652 {
653 struct camif_vp *vp = video_drvdata(file);
654
655 strlcpy(cap->driver, S3C_CAMIF_DRIVER_NAME, sizeof(cap->driver));
656 strlcpy(cap->card, S3C_CAMIF_DRIVER_NAME, sizeof(cap->card));
657 snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s.%d",
658 dev_name(vp->camif->dev), vp->id);
659
660 cap->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_CAPTURE;
661 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
662
663 return 0;
664 }
665
666 static int s3c_camif_vidioc_enum_input(struct file *file, void *priv,
667 struct v4l2_input *input)
668 {
669 struct camif_vp *vp = video_drvdata(file);
670 struct v4l2_subdev *sensor = vp->camif->sensor.sd;
671
672 if (input->index || sensor == NULL)
673 return -EINVAL;
674
675 input->type = V4L2_INPUT_TYPE_CAMERA;
676 strlcpy(input->name, sensor->name, sizeof(input->name));
677 return 0;
678 }
679
680 static int s3c_camif_vidioc_s_input(struct file *file, void *priv,
681 unsigned int i)
682 {
683 return i == 0 ? 0 : -EINVAL;
684 }
685
686 static int s3c_camif_vidioc_g_input(struct file *file, void *priv,
687 unsigned int *i)
688 {
689 *i = 0;
690 return 0;
691 }
692
693 static int s3c_camif_vidioc_enum_fmt(struct file *file, void *priv,
694 struct v4l2_fmtdesc *f)
695 {
696 struct camif_vp *vp = video_drvdata(file);
697 const struct camif_fmt *fmt;
698
699 fmt = s3c_camif_find_format(vp, NULL, f->index);
700 if (!fmt)
701 return -EINVAL;
702
703 strlcpy(f->description, fmt->name, sizeof(f->description));
704 f->pixelformat = fmt->fourcc;
705
706 pr_debug("fmt(%d): %s\n", f->index, f->description);
707 return 0;
708 }
709
710 static int s3c_camif_vidioc_g_fmt(struct file *file, void *priv,
711 struct v4l2_format *f)
712 {
713 struct camif_vp *vp = video_drvdata(file);
714 struct v4l2_pix_format *pix = &f->fmt.pix;
715 struct camif_frame *frame = &vp->out_frame;
716 const struct camif_fmt *fmt = vp->out_fmt;
717
718 pix->bytesperline = frame->f_width * fmt->ybpp;
719 pix->sizeimage = vp->payload;
720
721 pix->pixelformat = fmt->fourcc;
722 pix->width = frame->f_width;
723 pix->height = frame->f_height;
724 pix->field = V4L2_FIELD_NONE;
725 pix->colorspace = V4L2_COLORSPACE_JPEG;
726
727 return 0;
728 }
729
730 static int __camif_video_try_format(struct camif_vp *vp,
731 struct v4l2_pix_format *pix,
732 const struct camif_fmt **ffmt)
733 {
734 struct camif_dev *camif = vp->camif;
735 struct v4l2_rect *crop = &camif->camif_crop;
736 unsigned int wmin, hmin, sc_hrmax, sc_vrmax;
737 const struct vp_pix_limits *pix_lim;
738 const struct camif_fmt *fmt;
739
740 fmt = s3c_camif_find_format(vp, &pix->pixelformat, 0);
741
742 if (WARN_ON(fmt == NULL))
743 return -EINVAL;
744
745 if (ffmt)
746 *ffmt = fmt;
747
748 pix_lim = &camif->variant->vp_pix_limits[vp->id];
749
750 pr_debug("fmt: %ux%u, crop: %ux%u, bytesperline: %u\n",
751 pix->width, pix->height, crop->width, crop->height,
752 pix->bytesperline);
753 /*
754 * Calculate minimum width and height according to the configured
755 * camera input interface crop rectangle and the resizer's capabilities.
756 */
757 sc_hrmax = min(SCALER_MAX_RATIO, 1 << (ffs(crop->width) - 3));
758 sc_vrmax = min(SCALER_MAX_RATIO, 1 << (ffs(crop->height) - 1));
759
760 wmin = max_t(u32, pix_lim->min_out_width, crop->width / sc_hrmax);
761 wmin = round_up(wmin, pix_lim->out_width_align);
762 hmin = max_t(u32, 8, crop->height / sc_vrmax);
763 hmin = round_up(hmin, 8);
764
765 v4l_bound_align_image(&pix->width, wmin, pix_lim->max_sc_out_width,
766 ffs(pix_lim->out_width_align) - 1,
767 &pix->height, hmin, pix_lim->max_height, 0, 0);
768
769 pix->bytesperline = pix->width * fmt->ybpp;
770 pix->sizeimage = (pix->width * pix->height * fmt->depth) / 8;
771 pix->pixelformat = fmt->fourcc;
772 pix->colorspace = V4L2_COLORSPACE_JPEG;
773 pix->field = V4L2_FIELD_NONE;
774
775 pr_debug("%ux%u, wmin: %d, hmin: %d, sc_hrmax: %d, sc_vrmax: %d\n",
776 pix->width, pix->height, wmin, hmin, sc_hrmax, sc_vrmax);
777
778 return 0;
779 }
780
781 static int s3c_camif_vidioc_try_fmt(struct file *file, void *priv,
782 struct v4l2_format *f)
783 {
784 struct camif_vp *vp = video_drvdata(file);
785 return __camif_video_try_format(vp, &f->fmt.pix, NULL);
786 }
787
788 static int s3c_camif_vidioc_s_fmt(struct file *file, void *priv,
789 struct v4l2_format *f)
790 {
791 struct v4l2_pix_format *pix = &f->fmt.pix;
792 struct camif_vp *vp = video_drvdata(file);
793 struct camif_frame *out_frame = &vp->out_frame;
794 const struct camif_fmt *fmt = NULL;
795 int ret;
796
797 pr_debug("[vp%d]\n", vp->id);
798
799 if (vb2_is_busy(&vp->vb_queue))
800 return -EBUSY;
801
802 ret = __camif_video_try_format(vp, &f->fmt.pix, &fmt);
803 if (ret < 0)
804 return ret;
805
806 vp->out_fmt = fmt;
807 vp->payload = pix->sizeimage;
808 out_frame->f_width = pix->width;
809 out_frame->f_height = pix->height;
810
811 /* Reset composition rectangle */
812 out_frame->rect.width = pix->width;
813 out_frame->rect.height = pix->height;
814 out_frame->rect.left = 0;
815 out_frame->rect.top = 0;
816
817 if (vp->owner == NULL)
818 vp->owner = priv;
819
820 pr_debug("%ux%u. payload: %u. fmt: %s. %d %d. sizeimage: %d. bpl: %d\n",
821 out_frame->f_width, out_frame->f_height, vp->payload, fmt->name,
822 pix->width * pix->height * fmt->depth, fmt->depth,
823 pix->sizeimage, pix->bytesperline);
824
825 return 0;
826 }
827
828 /* Only check pixel formats at the sensor and the camif subdev pads */
829 static int camif_pipeline_validate(struct camif_dev *camif)
830 {
831 struct v4l2_subdev_format src_fmt;
832 struct media_pad *pad;
833 int ret;
834
835 /* Retrieve format at the sensor subdev source pad */
836 pad = media_entity_remote_pad(&camif->pads[0]);
837 if (!pad || media_entity_type(pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
838 return -EPIPE;
839
840 src_fmt.pad = pad->index;
841 src_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
842 ret = v4l2_subdev_call(camif->sensor.sd, pad, get_fmt, NULL, &src_fmt);
843 if (ret < 0 && ret != -ENOIOCTLCMD)
844 return -EPIPE;
845
846 if (src_fmt.format.width != camif->mbus_fmt.width ||
847 src_fmt.format.height != camif->mbus_fmt.height ||
848 src_fmt.format.code != camif->mbus_fmt.code)
849 return -EPIPE;
850
851 return 0;
852 }
853
854 static int s3c_camif_streamon(struct file *file, void *priv,
855 enum v4l2_buf_type type)
856 {
857 struct camif_vp *vp = video_drvdata(file);
858 struct camif_dev *camif = vp->camif;
859 struct media_entity *sensor = &camif->sensor.sd->entity;
860 int ret;
861
862 pr_debug("[vp%d]\n", vp->id);
863
864 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
865 return -EINVAL;
866
867 if (vp->owner && vp->owner != priv)
868 return -EBUSY;
869
870 if (s3c_vp_active(vp))
871 return 0;
872
873 ret = media_entity_pipeline_start(sensor, camif->m_pipeline);
874 if (ret < 0)
875 return ret;
876
877 ret = camif_pipeline_validate(camif);
878 if (ret < 0) {
879 media_entity_pipeline_stop(sensor);
880 return ret;
881 }
882
883 return vb2_streamon(&vp->vb_queue, type);
884 }
885
886 static int s3c_camif_streamoff(struct file *file, void *priv,
887 enum v4l2_buf_type type)
888 {
889 struct camif_vp *vp = video_drvdata(file);
890 struct camif_dev *camif = vp->camif;
891 int ret;
892
893 pr_debug("[vp%d]\n", vp->id);
894
895 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
896 return -EINVAL;
897
898 if (vp->owner && vp->owner != priv)
899 return -EBUSY;
900
901 ret = vb2_streamoff(&vp->vb_queue, type);
902 if (ret == 0)
903 media_entity_pipeline_stop(&camif->sensor.sd->entity);
904 return ret;
905 }
906
907 static int s3c_camif_reqbufs(struct file *file, void *priv,
908 struct v4l2_requestbuffers *rb)
909 {
910 struct camif_vp *vp = video_drvdata(file);
911 int ret;
912
913 pr_debug("[vp%d] rb count: %d, owner: %p, priv: %p\n",
914 vp->id, rb->count, vp->owner, priv);
915
916 if (vp->owner && vp->owner != priv)
917 return -EBUSY;
918
919 if (rb->count)
920 rb->count = max_t(u32, CAMIF_REQ_BUFS_MIN, rb->count);
921 else
922 vp->owner = NULL;
923
924 ret = vb2_reqbufs(&vp->vb_queue, rb);
925 if (ret < 0)
926 return ret;
927
928 if (rb->count && rb->count < CAMIF_REQ_BUFS_MIN) {
929 rb->count = 0;
930 vb2_reqbufs(&vp->vb_queue, rb);
931 ret = -ENOMEM;
932 }
933
934 vp->reqbufs_count = rb->count;
935 if (vp->owner == NULL && rb->count > 0)
936 vp->owner = priv;
937
938 return ret;
939 }
940
941 static int s3c_camif_querybuf(struct file *file, void *priv,
942 struct v4l2_buffer *buf)
943 {
944 struct camif_vp *vp = video_drvdata(file);
945 return vb2_querybuf(&vp->vb_queue, buf);
946 }
947
948 static int s3c_camif_qbuf(struct file *file, void *priv,
949 struct v4l2_buffer *buf)
950 {
951 struct camif_vp *vp = video_drvdata(file);
952
953 pr_debug("[vp%d]\n", vp->id);
954
955 if (vp->owner && vp->owner != priv)
956 return -EBUSY;
957
958 return vb2_qbuf(&vp->vb_queue, buf);
959 }
960
961 static int s3c_camif_dqbuf(struct file *file, void *priv,
962 struct v4l2_buffer *buf)
963 {
964 struct camif_vp *vp = video_drvdata(file);
965
966 pr_debug("[vp%d] sequence: %d\n", vp->id, vp->frame_sequence);
967
968 if (vp->owner && vp->owner != priv)
969 return -EBUSY;
970
971 return vb2_dqbuf(&vp->vb_queue, buf, file->f_flags & O_NONBLOCK);
972 }
973
974 static int s3c_camif_create_bufs(struct file *file, void *priv,
975 struct v4l2_create_buffers *create)
976 {
977 struct camif_vp *vp = video_drvdata(file);
978 int ret;
979
980 if (vp->owner && vp->owner != priv)
981 return -EBUSY;
982
983 create->count = max_t(u32, 1, create->count);
984 ret = vb2_create_bufs(&vp->vb_queue, create);
985
986 if (!ret && vp->owner == NULL)
987 vp->owner = priv;
988
989 return ret;
990 }
991
992 static int s3c_camif_prepare_buf(struct file *file, void *priv,
993 struct v4l2_buffer *b)
994 {
995 struct camif_vp *vp = video_drvdata(file);
996 return vb2_prepare_buf(&vp->vb_queue, b);
997 }
998
999 static int s3c_camif_g_selection(struct file *file, void *priv,
1000 struct v4l2_selection *sel)
1001 {
1002 struct camif_vp *vp = video_drvdata(file);
1003
1004 if (sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1005 return -EINVAL;
1006
1007 switch (sel->target) {
1008 case V4L2_SEL_TGT_COMPOSE_BOUNDS:
1009 case V4L2_SEL_TGT_COMPOSE_DEFAULT:
1010 sel->r.left = 0;
1011 sel->r.top = 0;
1012 sel->r.width = vp->out_frame.f_width;
1013 sel->r.height = vp->out_frame.f_height;
1014 return 0;
1015
1016 case V4L2_SEL_TGT_COMPOSE:
1017 sel->r = vp->out_frame.rect;
1018 return 0;
1019 }
1020
1021 return -EINVAL;
1022 }
1023
1024 static void __camif_try_compose(struct camif_dev *camif, struct camif_vp *vp,
1025 struct v4l2_rect *r)
1026 {
1027 /* s3c244x doesn't support composition */
1028 if (camif->variant->ip_revision == S3C244X_CAMIF_IP_REV) {
1029 *r = vp->out_frame.rect;
1030 return;
1031 }
1032
1033 /* TODO: s3c64xx */
1034 }
1035
1036 static int s3c_camif_s_selection(struct file *file, void *priv,
1037 struct v4l2_selection *sel)
1038 {
1039 struct camif_vp *vp = video_drvdata(file);
1040 struct camif_dev *camif = vp->camif;
1041 struct v4l2_rect rect = sel->r;
1042 unsigned long flags;
1043
1044 if (sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1045 sel->target != V4L2_SEL_TGT_COMPOSE)
1046 return -EINVAL;
1047
1048 __camif_try_compose(camif, vp, &rect);
1049
1050 sel->r = rect;
1051 spin_lock_irqsave(&camif->slock, flags);
1052 vp->out_frame.rect = rect;
1053 vp->state |= ST_VP_CONFIG;
1054 spin_unlock_irqrestore(&camif->slock, flags);
1055
1056 pr_debug("type: %#x, target: %#x, flags: %#x, (%d,%d)/%dx%d\n",
1057 sel->type, sel->target, sel->flags,
1058 sel->r.left, sel->r.top, sel->r.width, sel->r.height);
1059
1060 return 0;
1061 }
1062
1063 static const struct v4l2_ioctl_ops s3c_camif_ioctl_ops = {
1064 .vidioc_querycap = s3c_camif_vidioc_querycap,
1065 .vidioc_enum_input = s3c_camif_vidioc_enum_input,
1066 .vidioc_g_input = s3c_camif_vidioc_g_input,
1067 .vidioc_s_input = s3c_camif_vidioc_s_input,
1068 .vidioc_enum_fmt_vid_cap = s3c_camif_vidioc_enum_fmt,
1069 .vidioc_try_fmt_vid_cap = s3c_camif_vidioc_try_fmt,
1070 .vidioc_s_fmt_vid_cap = s3c_camif_vidioc_s_fmt,
1071 .vidioc_g_fmt_vid_cap = s3c_camif_vidioc_g_fmt,
1072 .vidioc_g_selection = s3c_camif_g_selection,
1073 .vidioc_s_selection = s3c_camif_s_selection,
1074 .vidioc_reqbufs = s3c_camif_reqbufs,
1075 .vidioc_querybuf = s3c_camif_querybuf,
1076 .vidioc_prepare_buf = s3c_camif_prepare_buf,
1077 .vidioc_create_bufs = s3c_camif_create_bufs,
1078 .vidioc_qbuf = s3c_camif_qbuf,
1079 .vidioc_dqbuf = s3c_camif_dqbuf,
1080 .vidioc_streamon = s3c_camif_streamon,
1081 .vidioc_streamoff = s3c_camif_streamoff,
1082 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1083 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1084 .vidioc_log_status = v4l2_ctrl_log_status,
1085 };
1086
1087 /*
1088 * Video node controls
1089 */
1090 static int s3c_camif_video_s_ctrl(struct v4l2_ctrl *ctrl)
1091 {
1092 struct camif_vp *vp = ctrl->priv;
1093 struct camif_dev *camif = vp->camif;
1094 unsigned long flags;
1095
1096 pr_debug("[vp%d] ctrl: %s, value: %d\n", vp->id,
1097 ctrl->name, ctrl->val);
1098
1099 spin_lock_irqsave(&camif->slock, flags);
1100
1101 switch (ctrl->id) {
1102 case V4L2_CID_HFLIP:
1103 vp->hflip = ctrl->val;
1104 break;
1105
1106 case V4L2_CID_VFLIP:
1107 vp->vflip = ctrl->val;
1108 break;
1109 }
1110
1111 vp->state |= ST_VP_CONFIG;
1112 spin_unlock_irqrestore(&camif->slock, flags);
1113 return 0;
1114 }
1115
1116 /* Codec and preview video node control ops */
1117 static const struct v4l2_ctrl_ops s3c_camif_video_ctrl_ops = {
1118 .s_ctrl = s3c_camif_video_s_ctrl,
1119 };
1120
1121 int s3c_camif_register_video_node(struct camif_dev *camif, int idx)
1122 {
1123 struct camif_vp *vp = &camif->vp[idx];
1124 struct vb2_queue *q = &vp->vb_queue;
1125 struct video_device *vfd = &vp->vdev;
1126 struct v4l2_ctrl *ctrl;
1127 int ret;
1128
1129 memset(vfd, 0, sizeof(*vfd));
1130 snprintf(vfd->name, sizeof(vfd->name), "camif-%s",
1131 vp->id == 0 ? "codec" : "preview");
1132
1133 vfd->fops = &s3c_camif_fops;
1134 vfd->ioctl_ops = &s3c_camif_ioctl_ops;
1135 vfd->v4l2_dev = &camif->v4l2_dev;
1136 vfd->minor = -1;
1137 vfd->release = video_device_release_empty;
1138 vfd->lock = &camif->lock;
1139 vp->reqbufs_count = 0;
1140
1141 INIT_LIST_HEAD(&vp->pending_buf_q);
1142 INIT_LIST_HEAD(&vp->active_buf_q);
1143
1144 memset(q, 0, sizeof(*q));
1145 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1146 q->io_modes = VB2_MMAP | VB2_USERPTR;
1147 q->ops = &s3c_camif_qops;
1148 q->mem_ops = &vb2_dma_contig_memops;
1149 q->buf_struct_size = sizeof(struct camif_buffer);
1150 q->drv_priv = vp;
1151 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1152 q->lock = &vp->camif->lock;
1153
1154 ret = vb2_queue_init(q);
1155 if (ret)
1156 goto err_vd_rel;
1157
1158 vp->pad.flags = MEDIA_PAD_FL_SINK;
1159 ret = media_entity_init(&vfd->entity, 1, &vp->pad, 0);
1160 if (ret)
1161 goto err_vd_rel;
1162
1163 video_set_drvdata(vfd, vp);
1164
1165 v4l2_ctrl_handler_init(&vp->ctrl_handler, 1);
1166 ctrl = v4l2_ctrl_new_std(&vp->ctrl_handler, &s3c_camif_video_ctrl_ops,
1167 V4L2_CID_HFLIP, 0, 1, 1, 0);
1168 if (ctrl)
1169 ctrl->priv = vp;
1170 ctrl = v4l2_ctrl_new_std(&vp->ctrl_handler, &s3c_camif_video_ctrl_ops,
1171 V4L2_CID_VFLIP, 0, 1, 1, 0);
1172 if (ctrl)
1173 ctrl->priv = vp;
1174
1175 ret = vp->ctrl_handler.error;
1176 if (ret < 0)
1177 goto err_me_cleanup;
1178
1179 vfd->ctrl_handler = &vp->ctrl_handler;
1180
1181 ret = video_register_device(vfd, VFL_TYPE_GRABBER, -1);
1182 if (ret)
1183 goto err_ctrlh_free;
1184
1185 v4l2_info(&camif->v4l2_dev, "registered %s as /dev/%s\n",
1186 vfd->name, video_device_node_name(vfd));
1187 return 0;
1188
1189 err_ctrlh_free:
1190 v4l2_ctrl_handler_free(&vp->ctrl_handler);
1191 err_me_cleanup:
1192 media_entity_cleanup(&vfd->entity);
1193 err_vd_rel:
1194 video_device_release(vfd);
1195 return ret;
1196 }
1197
1198 void s3c_camif_unregister_video_node(struct camif_dev *camif, int idx)
1199 {
1200 struct video_device *vfd = &camif->vp[idx].vdev;
1201
1202 if (video_is_registered(vfd)) {
1203 video_unregister_device(vfd);
1204 media_entity_cleanup(&vfd->entity);
1205 v4l2_ctrl_handler_free(vfd->ctrl_handler);
1206 }
1207 }
1208
1209 /* Media bus pixel formats supported at the camif input */
1210 static const u32 camif_mbus_formats[] = {
1211 MEDIA_BUS_FMT_YUYV8_2X8,
1212 MEDIA_BUS_FMT_YVYU8_2X8,
1213 MEDIA_BUS_FMT_UYVY8_2X8,
1214 MEDIA_BUS_FMT_VYUY8_2X8,
1215 };
1216
1217 /*
1218 * Camera input interface subdev operations
1219 */
1220
1221 static int s3c_camif_subdev_enum_mbus_code(struct v4l2_subdev *sd,
1222 struct v4l2_subdev_fh *fh,
1223 struct v4l2_subdev_mbus_code_enum *code)
1224 {
1225 if (code->index >= ARRAY_SIZE(camif_mbus_formats))
1226 return -EINVAL;
1227
1228 code->code = camif_mbus_formats[code->index];
1229 return 0;
1230 }
1231
1232 static int s3c_camif_subdev_get_fmt(struct v4l2_subdev *sd,
1233 struct v4l2_subdev_fh *fh,
1234 struct v4l2_subdev_format *fmt)
1235 {
1236 struct camif_dev *camif = v4l2_get_subdevdata(sd);
1237 struct v4l2_mbus_framefmt *mf = &fmt->format;
1238
1239 if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
1240 mf = v4l2_subdev_get_try_format(fh, fmt->pad);
1241 fmt->format = *mf;
1242 return 0;
1243 }
1244
1245 mutex_lock(&camif->lock);
1246
1247 switch (fmt->pad) {
1248 case CAMIF_SD_PAD_SINK:
1249 /* full camera input pixel size */
1250 *mf = camif->mbus_fmt;
1251 break;
1252
1253 case CAMIF_SD_PAD_SOURCE_C...CAMIF_SD_PAD_SOURCE_P:
1254 /* crop rectangle at camera interface input */
1255 mf->width = camif->camif_crop.width;
1256 mf->height = camif->camif_crop.height;
1257 mf->code = camif->mbus_fmt.code;
1258 break;
1259 }
1260
1261 mutex_unlock(&camif->lock);
1262 mf->field = V4L2_FIELD_NONE;
1263 mf->colorspace = V4L2_COLORSPACE_JPEG;
1264 return 0;
1265 }
1266
1267 static void __camif_subdev_try_format(struct camif_dev *camif,
1268 struct v4l2_mbus_framefmt *mf, int pad)
1269 {
1270 const struct s3c_camif_variant *variant = camif->variant;
1271 const struct vp_pix_limits *pix_lim;
1272 int i = ARRAY_SIZE(camif_mbus_formats);
1273
1274 /* FIXME: constraints against codec or preview path ? */
1275 pix_lim = &variant->vp_pix_limits[VP_CODEC];
1276
1277 while (i-- >= 0)
1278 if (camif_mbus_formats[i] == mf->code)
1279 break;
1280
1281 mf->code = camif_mbus_formats[i];
1282
1283 if (pad == CAMIF_SD_PAD_SINK) {
1284 v4l_bound_align_image(&mf->width, 8, CAMIF_MAX_PIX_WIDTH,
1285 ffs(pix_lim->out_width_align) - 1,
1286 &mf->height, 8, CAMIF_MAX_PIX_HEIGHT, 0,
1287 0);
1288 } else {
1289 struct v4l2_rect *crop = &camif->camif_crop;
1290 v4l_bound_align_image(&mf->width, 8, crop->width,
1291 ffs(pix_lim->out_width_align) - 1,
1292 &mf->height, 8, crop->height,
1293 0, 0);
1294 }
1295
1296 v4l2_dbg(1, debug, &camif->subdev, "%ux%u\n", mf->width, mf->height);
1297 }
1298
1299 static int s3c_camif_subdev_set_fmt(struct v4l2_subdev *sd,
1300 struct v4l2_subdev_fh *fh,
1301 struct v4l2_subdev_format *fmt)
1302 {
1303 struct camif_dev *camif = v4l2_get_subdevdata(sd);
1304 struct v4l2_mbus_framefmt *mf = &fmt->format;
1305 struct v4l2_rect *crop = &camif->camif_crop;
1306 int i;
1307
1308 v4l2_dbg(1, debug, sd, "pad%d: code: 0x%x, %ux%u\n",
1309 fmt->pad, mf->code, mf->width, mf->height);
1310
1311 mf->field = V4L2_FIELD_NONE;
1312 mf->colorspace = V4L2_COLORSPACE_JPEG;
1313 mutex_lock(&camif->lock);
1314
1315 /*
1316 * No pixel format change at the camera input is allowed
1317 * while streaming.
1318 */
1319 if (vb2_is_busy(&camif->vp[VP_CODEC].vb_queue) ||
1320 vb2_is_busy(&camif->vp[VP_PREVIEW].vb_queue)) {
1321 mutex_unlock(&camif->lock);
1322 return -EBUSY;
1323 }
1324
1325 __camif_subdev_try_format(camif, mf, fmt->pad);
1326
1327 if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
1328 mf = v4l2_subdev_get_try_format(fh, fmt->pad);
1329 *mf = fmt->format;
1330 mutex_unlock(&camif->lock);
1331 return 0;
1332 }
1333
1334 switch (fmt->pad) {
1335 case CAMIF_SD_PAD_SINK:
1336 camif->mbus_fmt = *mf;
1337 /* Reset sink crop rectangle. */
1338 crop->width = mf->width;
1339 crop->height = mf->height;
1340 crop->left = 0;
1341 crop->top = 0;
1342 /*
1343 * Reset source format (the camif's crop rectangle)
1344 * and the video output resolution.
1345 */
1346 for (i = 0; i < CAMIF_VP_NUM; i++) {
1347 struct camif_frame *frame = &camif->vp[i].out_frame;
1348 frame->rect = *crop;
1349 frame->f_width = mf->width;
1350 frame->f_height = mf->height;
1351 }
1352 break;
1353
1354 case CAMIF_SD_PAD_SOURCE_C...CAMIF_SD_PAD_SOURCE_P:
1355 /* Pixel format can be only changed on the sink pad. */
1356 mf->code = camif->mbus_fmt.code;
1357 mf->width = crop->width;
1358 mf->height = crop->height;
1359 break;
1360 }
1361
1362 mutex_unlock(&camif->lock);
1363 return 0;
1364 }
1365
1366 static int s3c_camif_subdev_get_selection(struct v4l2_subdev *sd,
1367 struct v4l2_subdev_fh *fh,
1368 struct v4l2_subdev_selection *sel)
1369 {
1370 struct camif_dev *camif = v4l2_get_subdevdata(sd);
1371 struct v4l2_rect *crop = &camif->camif_crop;
1372 struct v4l2_mbus_framefmt *mf = &camif->mbus_fmt;
1373
1374 if ((sel->target != V4L2_SEL_TGT_CROP &&
1375 sel->target != V4L2_SEL_TGT_CROP_BOUNDS) ||
1376 sel->pad != CAMIF_SD_PAD_SINK)
1377 return -EINVAL;
1378
1379 if (sel->which == V4L2_SUBDEV_FORMAT_TRY) {
1380 sel->r = *v4l2_subdev_get_try_crop(fh, sel->pad);
1381 return 0;
1382 }
1383
1384 mutex_lock(&camif->lock);
1385
1386 if (sel->target == V4L2_SEL_TGT_CROP) {
1387 sel->r = *crop;
1388 } else { /* crop bounds */
1389 sel->r.width = mf->width;
1390 sel->r.height = mf->height;
1391 sel->r.left = 0;
1392 sel->r.top = 0;
1393 }
1394
1395 mutex_unlock(&camif->lock);
1396
1397 v4l2_dbg(1, debug, sd, "%s: crop: (%d,%d) %dx%d, size: %ux%u\n",
1398 __func__, crop->left, crop->top, crop->width,
1399 crop->height, mf->width, mf->height);
1400
1401 return 0;
1402 }
1403
1404 static void __camif_try_crop(struct camif_dev *camif, struct v4l2_rect *r)
1405 {
1406 struct v4l2_mbus_framefmt *mf = &camif->mbus_fmt;
1407 const struct camif_pix_limits *pix_lim = &camif->variant->pix_limits;
1408 unsigned int left = 2 * r->left;
1409 unsigned int top = 2 * r->top;
1410
1411 /*
1412 * Following constraints must be met:
1413 * - r->width + 2 * r->left = mf->width;
1414 * - r->height + 2 * r->top = mf->height;
1415 * - crop rectangle size and position must be aligned
1416 * to 8 or 2 pixels, depending on SoC version.
1417 */
1418 v4l_bound_align_image(&r->width, 0, mf->width,
1419 ffs(pix_lim->win_hor_offset_align) - 1,
1420 &r->height, 0, mf->height, 1, 0);
1421
1422 v4l_bound_align_image(&left, 0, mf->width - r->width,
1423 ffs(pix_lim->win_hor_offset_align),
1424 &top, 0, mf->height - r->height, 2, 0);
1425
1426 r->left = left / 2;
1427 r->top = top / 2;
1428 r->width = mf->width - left;
1429 r->height = mf->height - top;
1430 /*
1431 * Make sure we either downscale or upscale both the pixel
1432 * width and height. Just return current crop rectangle if
1433 * this scaler constraint is not met.
1434 */
1435 if (camif->variant->ip_revision == S3C244X_CAMIF_IP_REV &&
1436 camif_is_streaming(camif)) {
1437 unsigned int i;
1438
1439 for (i = 0; i < CAMIF_VP_NUM; i++) {
1440 struct v4l2_rect *or = &camif->vp[i].out_frame.rect;
1441 if ((or->width > r->width) == (or->height > r->height))
1442 continue;
1443 *r = camif->camif_crop;
1444 pr_debug("Width/height scaling direction limitation\n");
1445 break;
1446 }
1447 }
1448
1449 v4l2_dbg(1, debug, &camif->v4l2_dev, "crop: (%d,%d)/%dx%d, fmt: %ux%u\n",
1450 r->left, r->top, r->width, r->height, mf->width, mf->height);
1451 }
1452
1453 static int s3c_camif_subdev_set_selection(struct v4l2_subdev *sd,
1454 struct v4l2_subdev_fh *fh,
1455 struct v4l2_subdev_selection *sel)
1456 {
1457 struct camif_dev *camif = v4l2_get_subdevdata(sd);
1458 struct v4l2_rect *crop = &camif->camif_crop;
1459 struct camif_scaler scaler;
1460
1461 if (sel->target != V4L2_SEL_TGT_CROP || sel->pad != CAMIF_SD_PAD_SINK)
1462 return -EINVAL;
1463
1464 mutex_lock(&camif->lock);
1465 __camif_try_crop(camif, &sel->r);
1466
1467 if (sel->which == V4L2_SUBDEV_FORMAT_TRY) {
1468 *v4l2_subdev_get_try_crop(fh, sel->pad) = sel->r;
1469 } else {
1470 unsigned long flags;
1471 unsigned int i;
1472
1473 spin_lock_irqsave(&camif->slock, flags);
1474 *crop = sel->r;
1475
1476 for (i = 0; i < CAMIF_VP_NUM; i++) {
1477 struct camif_vp *vp = &camif->vp[i];
1478 scaler = vp->scaler;
1479 if (s3c_camif_get_scaler_config(vp, &scaler))
1480 continue;
1481 vp->scaler = scaler;
1482 vp->state |= ST_VP_CONFIG;
1483 }
1484
1485 spin_unlock_irqrestore(&camif->slock, flags);
1486 }
1487 mutex_unlock(&camif->lock);
1488
1489 v4l2_dbg(1, debug, sd, "%s: (%d,%d) %dx%d, f_w: %u, f_h: %u\n",
1490 __func__, crop->left, crop->top, crop->width, crop->height,
1491 camif->mbus_fmt.width, camif->mbus_fmt.height);
1492
1493 return 0;
1494 }
1495
1496 static const struct v4l2_subdev_pad_ops s3c_camif_subdev_pad_ops = {
1497 .enum_mbus_code = s3c_camif_subdev_enum_mbus_code,
1498 .get_selection = s3c_camif_subdev_get_selection,
1499 .set_selection = s3c_camif_subdev_set_selection,
1500 .get_fmt = s3c_camif_subdev_get_fmt,
1501 .set_fmt = s3c_camif_subdev_set_fmt,
1502 };
1503
1504 static struct v4l2_subdev_ops s3c_camif_subdev_ops = {
1505 .pad = &s3c_camif_subdev_pad_ops,
1506 };
1507
1508 static int s3c_camif_subdev_s_ctrl(struct v4l2_ctrl *ctrl)
1509 {
1510 struct camif_dev *camif = container_of(ctrl->handler, struct camif_dev,
1511 ctrl_handler);
1512 unsigned long flags;
1513
1514 spin_lock_irqsave(&camif->slock, flags);
1515
1516 switch (ctrl->id) {
1517 case V4L2_CID_COLORFX:
1518 camif->colorfx = camif->ctrl_colorfx->val;
1519 /* Set Cb, Cr */
1520 switch (ctrl->val) {
1521 case V4L2_COLORFX_SEPIA:
1522 camif->colorfx_cb = 115;
1523 camif->colorfx_cr = 145;
1524 break;
1525 case V4L2_COLORFX_SET_CBCR:
1526 camif->colorfx_cb = camif->ctrl_colorfx_cbcr->val >> 8;
1527 camif->colorfx_cr = camif->ctrl_colorfx_cbcr->val & 0xff;
1528 break;
1529 default:
1530 /* for V4L2_COLORFX_BW and others */
1531 camif->colorfx_cb = 128;
1532 camif->colorfx_cr = 128;
1533 }
1534 break;
1535 case V4L2_CID_TEST_PATTERN:
1536 camif->test_pattern = camif->ctrl_test_pattern->val;
1537 break;
1538 default:
1539 WARN_ON(1);
1540 }
1541
1542 camif->vp[VP_CODEC].state |= ST_VP_CONFIG;
1543 camif->vp[VP_PREVIEW].state |= ST_VP_CONFIG;
1544 spin_unlock_irqrestore(&camif->slock, flags);
1545
1546 return 0;
1547 }
1548
1549 static const struct v4l2_ctrl_ops s3c_camif_subdev_ctrl_ops = {
1550 .s_ctrl = s3c_camif_subdev_s_ctrl,
1551 };
1552
1553 static const char * const s3c_camif_test_pattern_menu[] = {
1554 "Disabled",
1555 "Color bars",
1556 "Horizontal increment",
1557 "Vertical increment",
1558 };
1559
1560 int s3c_camif_create_subdev(struct camif_dev *camif)
1561 {
1562 struct v4l2_ctrl_handler *handler = &camif->ctrl_handler;
1563 struct v4l2_subdev *sd = &camif->subdev;
1564 int ret;
1565
1566 v4l2_subdev_init(sd, &s3c_camif_subdev_ops);
1567 sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
1568 strlcpy(sd->name, "S3C-CAMIF", sizeof(sd->name));
1569
1570 camif->pads[CAMIF_SD_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
1571 camif->pads[CAMIF_SD_PAD_SOURCE_C].flags = MEDIA_PAD_FL_SOURCE;
1572 camif->pads[CAMIF_SD_PAD_SOURCE_P].flags = MEDIA_PAD_FL_SOURCE;
1573
1574 ret = media_entity_init(&sd->entity, CAMIF_SD_PADS_NUM,
1575 camif->pads, 0);
1576 if (ret)
1577 return ret;
1578
1579 v4l2_ctrl_handler_init(handler, 3);
1580 camif->ctrl_test_pattern = v4l2_ctrl_new_std_menu_items(handler,
1581 &s3c_camif_subdev_ctrl_ops, V4L2_CID_TEST_PATTERN,
1582 ARRAY_SIZE(s3c_camif_test_pattern_menu) - 1, 0, 0,
1583 s3c_camif_test_pattern_menu);
1584
1585 if (camif->variant->has_img_effect) {
1586 camif->ctrl_colorfx = v4l2_ctrl_new_std_menu(handler,
1587 &s3c_camif_subdev_ctrl_ops,
1588 V4L2_CID_COLORFX, V4L2_COLORFX_SET_CBCR,
1589 ~0x981f, V4L2_COLORFX_NONE);
1590
1591 camif->ctrl_colorfx_cbcr = v4l2_ctrl_new_std(handler,
1592 &s3c_camif_subdev_ctrl_ops,
1593 V4L2_CID_COLORFX_CBCR, 0, 0xffff, 1, 0);
1594 }
1595
1596 if (handler->error) {
1597 v4l2_ctrl_handler_free(handler);
1598 media_entity_cleanup(&sd->entity);
1599 return handler->error;
1600 }
1601
1602 if (camif->variant->has_img_effect)
1603 v4l2_ctrl_auto_cluster(2, &camif->ctrl_colorfx,
1604 V4L2_COLORFX_SET_CBCR, false);
1605
1606 sd->ctrl_handler = handler;
1607 v4l2_set_subdevdata(sd, camif);
1608
1609 return 0;
1610 }
1611
1612 void s3c_camif_unregister_subdev(struct camif_dev *camif)
1613 {
1614 struct v4l2_subdev *sd = &camif->subdev;
1615
1616 /* Return if not registered */
1617 if (v4l2_get_subdevdata(sd) == NULL)
1618 return;
1619
1620 v4l2_device_unregister_subdev(sd);
1621 media_entity_cleanup(&sd->entity);
1622 v4l2_ctrl_handler_free(&camif->ctrl_handler);
1623 v4l2_set_subdevdata(sd, NULL);
1624 }
1625
1626 int s3c_camif_set_defaults(struct camif_dev *camif)
1627 {
1628 unsigned int ip_rev = camif->variant->ip_revision;
1629 int i;
1630
1631 for (i = 0; i < CAMIF_VP_NUM; i++) {
1632 struct camif_vp *vp = &camif->vp[i];
1633 struct camif_frame *f = &vp->out_frame;
1634
1635 vp->camif = camif;
1636 vp->id = i;
1637 vp->offset = camif->variant->vp_offset;
1638
1639 if (ip_rev == S3C244X_CAMIF_IP_REV)
1640 vp->fmt_flags = i ? FMT_FL_S3C24XX_PREVIEW :
1641 FMT_FL_S3C24XX_CODEC;
1642 else
1643 vp->fmt_flags = FMT_FL_S3C64XX;
1644
1645 vp->out_fmt = s3c_camif_find_format(vp, NULL, 0);
1646 BUG_ON(vp->out_fmt == NULL);
1647
1648 memset(f, 0, sizeof(*f));
1649 f->f_width = CAMIF_DEF_WIDTH;
1650 f->f_height = CAMIF_DEF_HEIGHT;
1651 f->rect.width = CAMIF_DEF_WIDTH;
1652 f->rect.height = CAMIF_DEF_HEIGHT;
1653
1654 /* Scaler is always enabled */
1655 vp->scaler.enable = 1;
1656
1657 vp->payload = (f->f_width * f->f_height *
1658 vp->out_fmt->depth) / 8;
1659 }
1660
1661 memset(&camif->mbus_fmt, 0, sizeof(camif->mbus_fmt));
1662 camif->mbus_fmt.width = CAMIF_DEF_WIDTH;
1663 camif->mbus_fmt.height = CAMIF_DEF_HEIGHT;
1664 camif->mbus_fmt.code = camif_mbus_formats[0];
1665
1666 memset(&camif->camif_crop, 0, sizeof(camif->camif_crop));
1667 camif->camif_crop.width = CAMIF_DEF_WIDTH;
1668 camif->camif_crop.height = CAMIF_DEF_HEIGHT;
1669
1670 return 0;
1671 }
Linux kernel - Deliverables
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