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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
[cris-mirror.git] / drivers / media / platform / s3c-camif / camif-capture.c
blob437395a6106534e510053b5d25be16ce6d450bc1
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-v4l2.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_cr, camif->colorfx_cb);
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 (camif->sensor.power_count == !on)
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 (camif->sensor.stream_count == !on)
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, 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, 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 /*
332 * Get previous DMA write buffer index:
333 * 0 => DMA buffer 0, 2;
334 * 1 => DMA buffer 1, 3.
335 */
336 index = (CISTATUS_FRAMECNT(status) + 2) & 1;
337 vbuf = camif_active_queue_peek(vp, index);
338
339 if (!WARN_ON(vbuf == NULL)) {
340 /* Dequeue a filled buffer */
341 vbuf->vb.vb2_buf.timestamp = ktime_get_ns();
342 vbuf->vb.sequence = vp->frame_sequence++;
343 vb2_buffer_done(&vbuf->vb.vb2_buf, VB2_BUF_STATE_DONE);
344
345 /* Set up an empty buffer at the DMA engine */
346 vbuf = camif_pending_queue_pop(vp);
347 vbuf->index = index;
348 camif_hw_set_output_addr(vp, &vbuf->paddr, index);
349 camif_hw_set_output_addr(vp, &vbuf->paddr, index + 2);
350
351 /* Scheduled in H/W, add to the queue */
352 camif_active_queue_add(vp, vbuf);
353 }
354 } else if (!(vp->state & ST_VP_ABORTING) &&
355 (vp->state & ST_VP_PENDING)) {
356 vp->state |= ST_VP_RUNNING;
357 }
358
359 if (vp->state & ST_VP_CONFIG) {
360 camif_prepare_dma_offset(vp);
361 camif_hw_set_camera_crop(camif);
362 camif_hw_set_scaler(vp);
363 camif_hw_set_flip(vp);
364 camif_hw_set_test_pattern(camif, camif->test_pattern);
365 if (camif->variant->has_img_effect)
366 camif_hw_set_effect(camif, camif->colorfx,
367 camif->colorfx_cr, camif->colorfx_cb);
368 vp->state &= ~ST_VP_CONFIG;
369 }
370 unlock:
371 spin_unlock(&camif->slock);
372 return IRQ_HANDLED;
373 }
374
375 static int start_streaming(struct vb2_queue *vq, unsigned int count)
376 {
377 struct camif_vp *vp = vb2_get_drv_priv(vq);
378 struct camif_dev *camif = vp->camif;
379 unsigned long flags;
380 int ret;
381
382 /*
383 * We assume the codec capture path is always activated
384 * first, before the preview path starts streaming.
385 * This is required to avoid internal FIFO overflow and
386 * a need for CAMIF software reset.
387 */
388 spin_lock_irqsave(&camif->slock, flags);
389
390 if (camif->stream_count == 0) {
391 camif_hw_reset(camif);
392 ret = s3c_camif_hw_init(camif, vp);
393 } else {
394 ret = s3c_camif_hw_vp_init(camif, vp);
395 }
396 spin_unlock_irqrestore(&camif->slock, flags);
397
398 if (ret < 0) {
399 camif_reinitialize(vp);
400 return ret;
401 }
402
403 spin_lock_irqsave(&camif->slock, flags);
404 vp->frame_sequence = 0;
405 vp->state |= ST_VP_PENDING;
406
407 if (!list_empty(&vp->pending_buf_q) &&
408 (!(vp->state & ST_VP_STREAMING) ||
409 !(vp->state & ST_VP_SENSOR_STREAMING))) {
410
411 camif_hw_enable_scaler(vp, vp->scaler.enable);
412 camif_hw_enable_capture(vp);
413 vp->state |= ST_VP_STREAMING;
414
415 if (!(vp->state & ST_VP_SENSOR_STREAMING)) {
416 vp->state |= ST_VP_SENSOR_STREAMING;
417 spin_unlock_irqrestore(&camif->slock, flags);
418 ret = sensor_set_streaming(camif, 1);
419 if (ret)
420 v4l2_err(&vp->vdev, "Sensor s_stream failed\n");
421 if (debug)
422 camif_hw_dump_regs(camif, __func__);
423
424 return ret;
425 }
426 }
427
428 spin_unlock_irqrestore(&camif->slock, flags);
429 return 0;
430 }
431
432 static void stop_streaming(struct vb2_queue *vq)
433 {
434 struct camif_vp *vp = vb2_get_drv_priv(vq);
435 camif_stop_capture(vp);
436 }
437
438 static int queue_setup(struct vb2_queue *vq,
439 unsigned int *num_buffers, unsigned int *num_planes,
440 unsigned int sizes[], struct device *alloc_devs[])
441 {
442 struct camif_vp *vp = vb2_get_drv_priv(vq);
443 struct camif_frame *frame = &vp->out_frame;
444 const struct camif_fmt *fmt = vp->out_fmt;
445 unsigned int size;
446
447 if (fmt == NULL)
448 return -EINVAL;
449
450 size = (frame->f_width * frame->f_height * fmt->depth) / 8;
451
452 if (*num_planes)
453 return sizes[0] < size ? -EINVAL : 0;
454
455 *num_planes = 1;
456 sizes[0] = size;
457
458 pr_debug("size: %u\n", sizes[0]);
459 return 0;
460 }
461
462 static int buffer_prepare(struct vb2_buffer *vb)
463 {
464 struct camif_vp *vp = vb2_get_drv_priv(vb->vb2_queue);
465
466 if (vp->out_fmt == NULL)
467 return -EINVAL;
468
469 if (vb2_plane_size(vb, 0) < vp->payload) {
470 v4l2_err(&vp->vdev, "buffer too small: %lu, required: %u\n",
471 vb2_plane_size(vb, 0), vp->payload);
472 return -EINVAL;
473 }
474 vb2_set_plane_payload(vb, 0, vp->payload);
475
476 return 0;
477 }
478
479 static void buffer_queue(struct vb2_buffer *vb)
480 {
481 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
482 struct camif_buffer *buf = container_of(vbuf, struct camif_buffer, vb);
483 struct camif_vp *vp = vb2_get_drv_priv(vb->vb2_queue);
484 struct camif_dev *camif = vp->camif;
485 unsigned long flags;
486
487 spin_lock_irqsave(&camif->slock, flags);
488 WARN_ON(camif_prepare_addr(vp, &buf->vb.vb2_buf, &buf->paddr));
489
490 if (!(vp->state & ST_VP_STREAMING) && vp->active_buffers < 2) {
491 /* Schedule an empty buffer in H/W */
492 buf->index = vp->buf_index;
493
494 camif_hw_set_output_addr(vp, &buf->paddr, buf->index);
495 camif_hw_set_output_addr(vp, &buf->paddr, buf->index + 2);
496
497 camif_active_queue_add(vp, buf);
498 vp->buf_index = !vp->buf_index;
499 } else {
500 camif_pending_queue_add(vp, buf);
501 }
502
503 if (vb2_is_streaming(&vp->vb_queue) && !list_empty(&vp->pending_buf_q)
504 && !(vp->state & ST_VP_STREAMING)) {
505
506 vp->state |= ST_VP_STREAMING;
507 camif_hw_enable_scaler(vp, vp->scaler.enable);
508 camif_hw_enable_capture(vp);
509 spin_unlock_irqrestore(&camif->slock, flags);
510
511 if (!(vp->state & ST_VP_SENSOR_STREAMING)) {
512 if (sensor_set_streaming(camif, 1) == 0)
513 vp->state |= ST_VP_SENSOR_STREAMING;
514 else
515 v4l2_err(&vp->vdev, "Sensor s_stream failed\n");
516
517 if (debug)
518 camif_hw_dump_regs(camif, __func__);
519 }
520 return;
521 }
522 spin_unlock_irqrestore(&camif->slock, flags);
523 }
524
525 static const struct vb2_ops s3c_camif_qops = {
526 .queue_setup = queue_setup,
527 .buf_prepare = buffer_prepare,
528 .buf_queue = buffer_queue,
529 .wait_prepare = vb2_ops_wait_prepare,
530 .wait_finish = vb2_ops_wait_finish,
531 .start_streaming = start_streaming,
532 .stop_streaming = stop_streaming,
533 };
534
535 static int s3c_camif_open(struct file *file)
536 {
537 struct camif_vp *vp = video_drvdata(file);
538 struct camif_dev *camif = vp->camif;
539 int ret;
540
541 pr_debug("[vp%d] state: %#x, owner: %p, pid: %d\n", vp->id,
542 vp->state, vp->owner, task_pid_nr(current));
543
544 if (mutex_lock_interruptible(&camif->lock))
545 return -ERESTARTSYS;
546
547 ret = v4l2_fh_open(file);
548 if (ret < 0)
549 goto unlock;
550
551 ret = pm_runtime_get_sync(camif->dev);
552 if (ret < 0)
553 goto err_pm;
554
555 ret = sensor_set_power(camif, 1);
556 if (!ret)
557 goto unlock;
558
559 pm_runtime_put(camif->dev);
560 err_pm:
561 v4l2_fh_release(file);
562 unlock:
563 mutex_unlock(&camif->lock);
564 return ret;
565 }
566
567 static int s3c_camif_close(struct file *file)
568 {
569 struct camif_vp *vp = video_drvdata(file);
570 struct camif_dev *camif = vp->camif;
571 int ret;
572
573 pr_debug("[vp%d] state: %#x, owner: %p, pid: %d\n", vp->id,
574 vp->state, vp->owner, task_pid_nr(current));
575
576 mutex_lock(&camif->lock);
577
578 if (vp->owner == file->private_data) {
579 camif_stop_capture(vp);
580 vb2_queue_release(&vp->vb_queue);
581 vp->owner = NULL;
582 }
583
584 sensor_set_power(camif, 0);
585
586 pm_runtime_put(camif->dev);
587 ret = v4l2_fh_release(file);
588
589 mutex_unlock(&camif->lock);
590 return ret;
591 }
592
593 static __poll_t s3c_camif_poll(struct file *file,
594 struct poll_table_struct *wait)
595 {
596 struct camif_vp *vp = video_drvdata(file);
597 struct camif_dev *camif = vp->camif;
598 __poll_t ret;
599
600 mutex_lock(&camif->lock);
601 if (vp->owner && vp->owner != file->private_data)
602 ret = -EBUSY;
603 else
604 ret = vb2_poll(&vp->vb_queue, file, wait);
605
606 mutex_unlock(&camif->lock);
607 return ret;
608 }
609
610 static int s3c_camif_mmap(struct file *file, struct vm_area_struct *vma)
611 {
612 struct camif_vp *vp = video_drvdata(file);
613 int ret;
614
615 if (vp->owner && vp->owner != file->private_data)
616 ret = -EBUSY;
617 else
618 ret = vb2_mmap(&vp->vb_queue, vma);
619
620 return ret;
621 }
622
623 static const struct v4l2_file_operations s3c_camif_fops = {
624 .owner = THIS_MODULE,
625 .open = s3c_camif_open,
626 .release = s3c_camif_close,
627 .poll = s3c_camif_poll,
628 .unlocked_ioctl = video_ioctl2,
629 .mmap = s3c_camif_mmap,
630 };
631
632 /*
633 * Video node IOCTLs
634 */
635
636 static int s3c_camif_vidioc_querycap(struct file *file, void *priv,
637 struct v4l2_capability *cap)
638 {
639 struct camif_vp *vp = video_drvdata(file);
640
641 strlcpy(cap->driver, S3C_CAMIF_DRIVER_NAME, sizeof(cap->driver));
642 strlcpy(cap->card, S3C_CAMIF_DRIVER_NAME, sizeof(cap->card));
643 snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s.%d",
644 dev_name(vp->camif->dev), vp->id);
645
646 cap->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_CAPTURE;
647 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
648
649 return 0;
650 }
651
652 static int s3c_camif_vidioc_enum_input(struct file *file, void *priv,
653 struct v4l2_input *input)
654 {
655 struct camif_vp *vp = video_drvdata(file);
656 struct v4l2_subdev *sensor = vp->camif->sensor.sd;
657
658 if (input->index || sensor == NULL)
659 return -EINVAL;
660
661 input->type = V4L2_INPUT_TYPE_CAMERA;
662 strlcpy(input->name, sensor->name, sizeof(input->name));
663 return 0;
664 }
665
666 static int s3c_camif_vidioc_s_input(struct file *file, void *priv,
667 unsigned int i)
668 {
669 return i == 0 ? 0 : -EINVAL;
670 }
671
672 static int s3c_camif_vidioc_g_input(struct file *file, void *priv,
673 unsigned int *i)
674 {
675 *i = 0;
676 return 0;
677 }
678
679 static int s3c_camif_vidioc_enum_fmt(struct file *file, void *priv,
680 struct v4l2_fmtdesc *f)
681 {
682 struct camif_vp *vp = video_drvdata(file);
683 const struct camif_fmt *fmt;
684
685 fmt = s3c_camif_find_format(vp, NULL, f->index);
686 if (!fmt)
687 return -EINVAL;
688
689 strlcpy(f->description, fmt->name, sizeof(f->description));
690 f->pixelformat = fmt->fourcc;
691
692 pr_debug("fmt(%d): %s\n", f->index, f->description);
693 return 0;
694 }
695
696 static int s3c_camif_vidioc_g_fmt(struct file *file, void *priv,
697 struct v4l2_format *f)
698 {
699 struct camif_vp *vp = video_drvdata(file);
700 struct v4l2_pix_format *pix = &f->fmt.pix;
701 struct camif_frame *frame = &vp->out_frame;
702 const struct camif_fmt *fmt = vp->out_fmt;
703
704 pix->bytesperline = frame->f_width * fmt->ybpp;
705 pix->sizeimage = vp->payload;
706
707 pix->pixelformat = fmt->fourcc;
708 pix->width = frame->f_width;
709 pix->height = frame->f_height;
710 pix->field = V4L2_FIELD_NONE;
711 pix->colorspace = V4L2_COLORSPACE_JPEG;
712
713 return 0;
714 }
715
716 static int __camif_video_try_format(struct camif_vp *vp,
717 struct v4l2_pix_format *pix,
718 const struct camif_fmt **ffmt)
719 {
720 struct camif_dev *camif = vp->camif;
721 struct v4l2_rect *crop = &camif->camif_crop;
722 unsigned int wmin, hmin, sc_hrmax, sc_vrmax;
723 const struct vp_pix_limits *pix_lim;
724 const struct camif_fmt *fmt;
725
726 fmt = s3c_camif_find_format(vp, &pix->pixelformat, 0);
727
728 if (WARN_ON(fmt == NULL))
729 return -EINVAL;
730
731 if (ffmt)
732 *ffmt = fmt;
733
734 pix_lim = &camif->variant->vp_pix_limits[vp->id];
735
736 pr_debug("fmt: %ux%u, crop: %ux%u, bytesperline: %u\n",
737 pix->width, pix->height, crop->width, crop->height,
738 pix->bytesperline);
739 /*
740 * Calculate minimum width and height according to the configured
741 * camera input interface crop rectangle and the resizer's capabilities.
742 */
743 sc_hrmax = min(SCALER_MAX_RATIO, 1 << (ffs(crop->width) - 3));
744 sc_vrmax = min(SCALER_MAX_RATIO, 1 << (ffs(crop->height) - 1));
745
746 wmin = max_t(u32, pix_lim->min_out_width, crop->width / sc_hrmax);
747 wmin = round_up(wmin, pix_lim->out_width_align);
748 hmin = max_t(u32, 8, crop->height / sc_vrmax);
749 hmin = round_up(hmin, 8);
750
751 v4l_bound_align_image(&pix->width, wmin, pix_lim->max_sc_out_width,
752 ffs(pix_lim->out_width_align) - 1,
753 &pix->height, hmin, pix_lim->max_height, 0, 0);
754
755 pix->bytesperline = pix->width * fmt->ybpp;
756 pix->sizeimage = (pix->width * pix->height * fmt->depth) / 8;
757 pix->pixelformat = fmt->fourcc;
758 pix->colorspace = V4L2_COLORSPACE_JPEG;
759 pix->field = V4L2_FIELD_NONE;
760
761 pr_debug("%ux%u, wmin: %d, hmin: %d, sc_hrmax: %d, sc_vrmax: %d\n",
762 pix->width, pix->height, wmin, hmin, sc_hrmax, sc_vrmax);
763
764 return 0;
765 }
766
767 static int s3c_camif_vidioc_try_fmt(struct file *file, void *priv,
768 struct v4l2_format *f)
769 {
770 struct camif_vp *vp = video_drvdata(file);
771 return __camif_video_try_format(vp, &f->fmt.pix, NULL);
772 }
773
774 static int s3c_camif_vidioc_s_fmt(struct file *file, void *priv,
775 struct v4l2_format *f)
776 {
777 struct v4l2_pix_format *pix = &f->fmt.pix;
778 struct camif_vp *vp = video_drvdata(file);
779 struct camif_frame *out_frame = &vp->out_frame;
780 const struct camif_fmt *fmt = NULL;
781 int ret;
782
783 pr_debug("[vp%d]\n", vp->id);
784
785 if (vb2_is_busy(&vp->vb_queue))
786 return -EBUSY;
787
788 ret = __camif_video_try_format(vp, &f->fmt.pix, &fmt);
789 if (ret < 0)
790 return ret;
791
792 vp->out_fmt = fmt;
793 vp->payload = pix->sizeimage;
794 out_frame->f_width = pix->width;
795 out_frame->f_height = pix->height;
796
797 /* Reset composition rectangle */
798 out_frame->rect.width = pix->width;
799 out_frame->rect.height = pix->height;
800 out_frame->rect.left = 0;
801 out_frame->rect.top = 0;
802
803 if (vp->owner == NULL)
804 vp->owner = priv;
805
806 pr_debug("%ux%u. payload: %u. fmt: %s. %d %d. sizeimage: %d. bpl: %d\n",
807 out_frame->f_width, out_frame->f_height, vp->payload, fmt->name,
808 pix->width * pix->height * fmt->depth, fmt->depth,
809 pix->sizeimage, pix->bytesperline);
810
811 return 0;
812 }
813
814 /* Only check pixel formats at the sensor and the camif subdev pads */
815 static int camif_pipeline_validate(struct camif_dev *camif)
816 {
817 struct v4l2_subdev_format src_fmt;
818 struct media_pad *pad;
819 int ret;
820
821 /* Retrieve format at the sensor subdev source pad */
822 pad = media_entity_remote_pad(&camif->pads[0]);
823 if (!pad || !is_media_entity_v4l2_subdev(pad->entity))
824 return -EPIPE;
825
826 src_fmt.pad = pad->index;
827 src_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
828 ret = v4l2_subdev_call(camif->sensor.sd, pad, get_fmt, NULL, &src_fmt);
829 if (ret < 0 && ret != -ENOIOCTLCMD)
830 return -EPIPE;
831
832 if (src_fmt.format.width != camif->mbus_fmt.width ||
833 src_fmt.format.height != camif->mbus_fmt.height ||
834 src_fmt.format.code != camif->mbus_fmt.code)
835 return -EPIPE;
836
837 return 0;
838 }
839
840 static int s3c_camif_streamon(struct file *file, void *priv,
841 enum v4l2_buf_type type)
842 {
843 struct camif_vp *vp = video_drvdata(file);
844 struct camif_dev *camif = vp->camif;
845 struct media_entity *sensor = &camif->sensor.sd->entity;
846 int ret;
847
848 pr_debug("[vp%d]\n", vp->id);
849
850 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
851 return -EINVAL;
852
853 if (vp->owner && vp->owner != priv)
854 return -EBUSY;
855
856 if (s3c_vp_active(vp))
857 return 0;
858
859 ret = media_pipeline_start(sensor, camif->m_pipeline);
860 if (ret < 0)
861 return ret;
862
863 ret = camif_pipeline_validate(camif);
864 if (ret < 0) {
865 media_pipeline_stop(sensor);
866 return ret;
867 }
868
869 return vb2_streamon(&vp->vb_queue, type);
870 }
871
872 static int s3c_camif_streamoff(struct file *file, void *priv,
873 enum v4l2_buf_type type)
874 {
875 struct camif_vp *vp = video_drvdata(file);
876 struct camif_dev *camif = vp->camif;
877 int ret;
878
879 pr_debug("[vp%d]\n", vp->id);
880
881 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
882 return -EINVAL;
883
884 if (vp->owner && vp->owner != priv)
885 return -EBUSY;
886
887 ret = vb2_streamoff(&vp->vb_queue, type);
888 if (ret == 0)
889 media_pipeline_stop(&camif->sensor.sd->entity);
890 return ret;
891 }
892
893 static int s3c_camif_reqbufs(struct file *file, void *priv,
894 struct v4l2_requestbuffers *rb)
895 {
896 struct camif_vp *vp = video_drvdata(file);
897 int ret;
898
899 pr_debug("[vp%d] rb count: %d, owner: %p, priv: %p\n",
900 vp->id, rb->count, vp->owner, priv);
901
902 if (vp->owner && vp->owner != priv)
903 return -EBUSY;
904
905 if (rb->count)
906 rb->count = max_t(u32, CAMIF_REQ_BUFS_MIN, rb->count);
907 else
908 vp->owner = NULL;
909
910 ret = vb2_reqbufs(&vp->vb_queue, rb);
911 if (ret < 0)
912 return ret;
913
914 if (rb->count && rb->count < CAMIF_REQ_BUFS_MIN) {
915 rb->count = 0;
916 vb2_reqbufs(&vp->vb_queue, rb);
917 ret = -ENOMEM;
918 }
919
920 vp->reqbufs_count = rb->count;
921 if (vp->owner == NULL && rb->count > 0)
922 vp->owner = priv;
923
924 return ret;
925 }
926
927 static int s3c_camif_querybuf(struct file *file, void *priv,
928 struct v4l2_buffer *buf)
929 {
930 struct camif_vp *vp = video_drvdata(file);
931 return vb2_querybuf(&vp->vb_queue, buf);
932 }
933
934 static int s3c_camif_qbuf(struct file *file, void *priv,
935 struct v4l2_buffer *buf)
936 {
937 struct camif_vp *vp = video_drvdata(file);
938
939 pr_debug("[vp%d]\n", vp->id);
940
941 if (vp->owner && vp->owner != priv)
942 return -EBUSY;
943
944 return vb2_qbuf(&vp->vb_queue, buf);
945 }
946
947 static int s3c_camif_dqbuf(struct file *file, void *priv,
948 struct v4l2_buffer *buf)
949 {
950 struct camif_vp *vp = video_drvdata(file);
951
952 pr_debug("[vp%d] sequence: %d\n", vp->id, vp->frame_sequence);
953
954 if (vp->owner && vp->owner != priv)
955 return -EBUSY;
956
957 return vb2_dqbuf(&vp->vb_queue, buf, file->f_flags & O_NONBLOCK);
958 }
959
960 static int s3c_camif_create_bufs(struct file *file, void *priv,
961 struct v4l2_create_buffers *create)
962 {
963 struct camif_vp *vp = video_drvdata(file);
964 int ret;
965
966 if (vp->owner && vp->owner != priv)
967 return -EBUSY;
968
969 create->count = max_t(u32, 1, create->count);
970 ret = vb2_create_bufs(&vp->vb_queue, create);
971
972 if (!ret && vp->owner == NULL)
973 vp->owner = priv;
974
975 return ret;
976 }
977
978 static int s3c_camif_prepare_buf(struct file *file, void *priv,
979 struct v4l2_buffer *b)
980 {
981 struct camif_vp *vp = video_drvdata(file);
982 return vb2_prepare_buf(&vp->vb_queue, b);
983 }
984
985 static int s3c_camif_g_selection(struct file *file, void *priv,
986 struct v4l2_selection *sel)
987 {
988 struct camif_vp *vp = video_drvdata(file);
989
990 if (sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
991 return -EINVAL;
992
993 switch (sel->target) {
994 case V4L2_SEL_TGT_COMPOSE_BOUNDS:
995 case V4L2_SEL_TGT_COMPOSE_DEFAULT:
996 sel->r.left = 0;
997 sel->r.top = 0;
998 sel->r.width = vp->out_frame.f_width;
999 sel->r.height = vp->out_frame.f_height;
1000 return 0;
1001
1002 case V4L2_SEL_TGT_COMPOSE:
1003 sel->r = vp->out_frame.rect;
1004 return 0;
1005 }
1006
1007 return -EINVAL;
1008 }
1009
1010 static void __camif_try_compose(struct camif_dev *camif, struct camif_vp *vp,
1011 struct v4l2_rect *r)
1012 {
1013 /* s3c244x doesn't support composition */
1014 if (camif->variant->ip_revision == S3C244X_CAMIF_IP_REV) {
1015 *r = vp->out_frame.rect;
1016 return;
1017 }
1018
1019 /* TODO: s3c64xx */
1020 }
1021
1022 static int s3c_camif_s_selection(struct file *file, void *priv,
1023 struct v4l2_selection *sel)
1024 {
1025 struct camif_vp *vp = video_drvdata(file);
1026 struct camif_dev *camif = vp->camif;
1027 struct v4l2_rect rect = sel->r;
1028 unsigned long flags;
1029
1030 if (sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1031 sel->target != V4L2_SEL_TGT_COMPOSE)
1032 return -EINVAL;
1033
1034 __camif_try_compose(camif, vp, &rect);
1035
1036 sel->r = rect;
1037 spin_lock_irqsave(&camif->slock, flags);
1038 vp->out_frame.rect = rect;
1039 vp->state |= ST_VP_CONFIG;
1040 spin_unlock_irqrestore(&camif->slock, flags);
1041
1042 pr_debug("type: %#x, target: %#x, flags: %#x, (%d,%d)/%dx%d\n",
1043 sel->type, sel->target, sel->flags,
1044 sel->r.left, sel->r.top, sel->r.width, sel->r.height);
1045
1046 return 0;
1047 }
1048
1049 static const struct v4l2_ioctl_ops s3c_camif_ioctl_ops = {
1050 .vidioc_querycap = s3c_camif_vidioc_querycap,
1051 .vidioc_enum_input = s3c_camif_vidioc_enum_input,
1052 .vidioc_g_input = s3c_camif_vidioc_g_input,
1053 .vidioc_s_input = s3c_camif_vidioc_s_input,
1054 .vidioc_enum_fmt_vid_cap = s3c_camif_vidioc_enum_fmt,
1055 .vidioc_try_fmt_vid_cap = s3c_camif_vidioc_try_fmt,
1056 .vidioc_s_fmt_vid_cap = s3c_camif_vidioc_s_fmt,
1057 .vidioc_g_fmt_vid_cap = s3c_camif_vidioc_g_fmt,
1058 .vidioc_g_selection = s3c_camif_g_selection,
1059 .vidioc_s_selection = s3c_camif_s_selection,
1060 .vidioc_reqbufs = s3c_camif_reqbufs,
1061 .vidioc_querybuf = s3c_camif_querybuf,
1062 .vidioc_prepare_buf = s3c_camif_prepare_buf,
1063 .vidioc_create_bufs = s3c_camif_create_bufs,
1064 .vidioc_qbuf = s3c_camif_qbuf,
1065 .vidioc_dqbuf = s3c_camif_dqbuf,
1066 .vidioc_streamon = s3c_camif_streamon,
1067 .vidioc_streamoff = s3c_camif_streamoff,
1068 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1069 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1070 .vidioc_log_status = v4l2_ctrl_log_status,
1071 };
1072
1073 /*
1074 * Video node controls
1075 */
1076 static int s3c_camif_video_s_ctrl(struct v4l2_ctrl *ctrl)
1077 {
1078 struct camif_vp *vp = ctrl->priv;
1079 struct camif_dev *camif = vp->camif;
1080 unsigned long flags;
1081
1082 pr_debug("[vp%d] ctrl: %s, value: %d\n", vp->id,
1083 ctrl->name, ctrl->val);
1084
1085 spin_lock_irqsave(&camif->slock, flags);
1086
1087 switch (ctrl->id) {
1088 case V4L2_CID_HFLIP:
1089 vp->hflip = ctrl->val;
1090 break;
1091
1092 case V4L2_CID_VFLIP:
1093 vp->vflip = ctrl->val;
1094 break;
1095 }
1096
1097 vp->state |= ST_VP_CONFIG;
1098 spin_unlock_irqrestore(&camif->slock, flags);
1099 return 0;
1100 }
1101
1102 /* Codec and preview video node control ops */
1103 static const struct v4l2_ctrl_ops s3c_camif_video_ctrl_ops = {
1104 .s_ctrl = s3c_camif_video_s_ctrl,
1105 };
1106
1107 int s3c_camif_register_video_node(struct camif_dev *camif, int idx)
1108 {
1109 struct camif_vp *vp = &camif->vp[idx];
1110 struct vb2_queue *q = &vp->vb_queue;
1111 struct video_device *vfd = &vp->vdev;
1112 struct v4l2_ctrl *ctrl;
1113 int ret;
1114
1115 memset(vfd, 0, sizeof(*vfd));
1116 snprintf(vfd->name, sizeof(vfd->name), "camif-%s",
1117 vp->id == 0 ? "codec" : "preview");
1118
1119 vfd->fops = &s3c_camif_fops;
1120 vfd->ioctl_ops = &s3c_camif_ioctl_ops;
1121 vfd->v4l2_dev = &camif->v4l2_dev;
1122 vfd->minor = -1;
1123 vfd->release = video_device_release_empty;
1124 vfd->lock = &camif->lock;
1125 vp->reqbufs_count = 0;
1126
1127 INIT_LIST_HEAD(&vp->pending_buf_q);
1128 INIT_LIST_HEAD(&vp->active_buf_q);
1129
1130 memset(q, 0, sizeof(*q));
1131 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1132 q->io_modes = VB2_MMAP | VB2_USERPTR;
1133 q->ops = &s3c_camif_qops;
1134 q->mem_ops = &vb2_dma_contig_memops;
1135 q->buf_struct_size = sizeof(struct camif_buffer);
1136 q->drv_priv = vp;
1137 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1138 q->lock = &vp->camif->lock;
1139 q->dev = camif->v4l2_dev.dev;
1140
1141 ret = vb2_queue_init(q);
1142 if (ret)
1143 goto err_vd_rel;
1144
1145 vp->pad.flags = MEDIA_PAD_FL_SINK;
1146 ret = media_entity_pads_init(&vfd->entity, 1, &vp->pad);
1147 if (ret)
1148 goto err_vd_rel;
1149
1150 video_set_drvdata(vfd, vp);
1151
1152 v4l2_ctrl_handler_init(&vp->ctrl_handler, 1);
1153 ctrl = v4l2_ctrl_new_std(&vp->ctrl_handler, &s3c_camif_video_ctrl_ops,
1154 V4L2_CID_HFLIP, 0, 1, 1, 0);
1155 if (ctrl)
1156 ctrl->priv = vp;
1157 ctrl = v4l2_ctrl_new_std(&vp->ctrl_handler, &s3c_camif_video_ctrl_ops,
1158 V4L2_CID_VFLIP, 0, 1, 1, 0);
1159 if (ctrl)
1160 ctrl->priv = vp;
1161
1162 ret = vp->ctrl_handler.error;
1163 if (ret < 0)
1164 goto err_me_cleanup;
1165
1166 vfd->ctrl_handler = &vp->ctrl_handler;
1167
1168 ret = video_register_device(vfd, VFL_TYPE_GRABBER, -1);
1169 if (ret)
1170 goto err_ctrlh_free;
1171
1172 v4l2_info(&camif->v4l2_dev, "registered %s as /dev/%s\n",
1173 vfd->name, video_device_node_name(vfd));
1174 return 0;
1175
1176 err_ctrlh_free:
1177 v4l2_ctrl_handler_free(&vp->ctrl_handler);
1178 err_me_cleanup:
1179 media_entity_cleanup(&vfd->entity);
1180 err_vd_rel:
1181 video_device_release(vfd);
1182 return ret;
1183 }
1184
1185 void s3c_camif_unregister_video_node(struct camif_dev *camif, int idx)
1186 {
1187 struct video_device *vfd = &camif->vp[idx].vdev;
1188
1189 if (video_is_registered(vfd)) {
1190 video_unregister_device(vfd);
1191 media_entity_cleanup(&vfd->entity);
1192 v4l2_ctrl_handler_free(vfd->ctrl_handler);
1193 }
1194 }
1195
1196 /* Media bus pixel formats supported at the camif input */
1197 static const u32 camif_mbus_formats[] = {
1198 MEDIA_BUS_FMT_YUYV8_2X8,
1199 MEDIA_BUS_FMT_YVYU8_2X8,
1200 MEDIA_BUS_FMT_UYVY8_2X8,
1201 MEDIA_BUS_FMT_VYUY8_2X8,
1202 };
1203
1204 /*
1205 * Camera input interface subdev operations
1206 */
1207
1208 static int s3c_camif_subdev_enum_mbus_code(struct v4l2_subdev *sd,
1209 struct v4l2_subdev_pad_config *cfg,
1210 struct v4l2_subdev_mbus_code_enum *code)
1211 {
1212 if (code->index >= ARRAY_SIZE(camif_mbus_formats))
1213 return -EINVAL;
1214
1215 code->code = camif_mbus_formats[code->index];
1216 return 0;
1217 }
1218
1219 static int s3c_camif_subdev_get_fmt(struct v4l2_subdev *sd,
1220 struct v4l2_subdev_pad_config *cfg,
1221 struct v4l2_subdev_format *fmt)
1222 {
1223 struct camif_dev *camif = v4l2_get_subdevdata(sd);
1224 struct v4l2_mbus_framefmt *mf = &fmt->format;
1225
1226 if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
1227 mf = v4l2_subdev_get_try_format(sd, cfg, fmt->pad);
1228 fmt->format = *mf;
1229 return 0;
1230 }
1231
1232 mutex_lock(&camif->lock);
1233
1234 switch (fmt->pad) {
1235 case CAMIF_SD_PAD_SINK:
1236 /* full camera input pixel size */
1237 *mf = camif->mbus_fmt;
1238 break;
1239
1240 case CAMIF_SD_PAD_SOURCE_C...CAMIF_SD_PAD_SOURCE_P:
1241 /* crop rectangle at camera interface input */
1242 mf->width = camif->camif_crop.width;
1243 mf->height = camif->camif_crop.height;
1244 mf->code = camif->mbus_fmt.code;
1245 break;
1246 }
1247
1248 mutex_unlock(&camif->lock);
1249 mf->field = V4L2_FIELD_NONE;
1250 mf->colorspace = V4L2_COLORSPACE_JPEG;
1251 return 0;
1252 }
1253
1254 static void __camif_subdev_try_format(struct camif_dev *camif,
1255 struct v4l2_mbus_framefmt *mf, int pad)
1256 {
1257 const struct s3c_camif_variant *variant = camif->variant;
1258 const struct vp_pix_limits *pix_lim;
1259 int i = ARRAY_SIZE(camif_mbus_formats);
1260
1261 /* FIXME: constraints against codec or preview path ? */
1262 pix_lim = &variant->vp_pix_limits[VP_CODEC];
1263
1264 while (i-- >= 0)
1265 if (camif_mbus_formats[i] == mf->code)
1266 break;
1267
1268 mf->code = camif_mbus_formats[i];
1269
1270 if (pad == CAMIF_SD_PAD_SINK) {
1271 v4l_bound_align_image(&mf->width, 8, CAMIF_MAX_PIX_WIDTH,
1272 ffs(pix_lim->out_width_align) - 1,
1273 &mf->height, 8, CAMIF_MAX_PIX_HEIGHT, 0,
1274 0);
1275 } else {
1276 struct v4l2_rect *crop = &camif->camif_crop;
1277 v4l_bound_align_image(&mf->width, 8, crop->width,
1278 ffs(pix_lim->out_width_align) - 1,
1279 &mf->height, 8, crop->height,
1280 0, 0);
1281 }
1282
1283 v4l2_dbg(1, debug, &camif->subdev, "%ux%u\n", mf->width, mf->height);
1284 }
1285
1286 static int s3c_camif_subdev_set_fmt(struct v4l2_subdev *sd,
1287 struct v4l2_subdev_pad_config *cfg,
1288 struct v4l2_subdev_format *fmt)
1289 {
1290 struct camif_dev *camif = v4l2_get_subdevdata(sd);
1291 struct v4l2_mbus_framefmt *mf = &fmt->format;
1292 struct v4l2_rect *crop = &camif->camif_crop;
1293 int i;
1294
1295 v4l2_dbg(1, debug, sd, "pad%d: code: 0x%x, %ux%u\n",
1296 fmt->pad, mf->code, mf->width, mf->height);
1297
1298 mf->field = V4L2_FIELD_NONE;
1299 mf->colorspace = V4L2_COLORSPACE_JPEG;
1300 mutex_lock(&camif->lock);
1301
1302 /*
1303 * No pixel format change at the camera input is allowed
1304 * while streaming.
1305 */
1306 if (vb2_is_busy(&camif->vp[VP_CODEC].vb_queue) ||
1307 vb2_is_busy(&camif->vp[VP_PREVIEW].vb_queue)) {
1308 mutex_unlock(&camif->lock);
1309 return -EBUSY;
1310 }
1311
1312 __camif_subdev_try_format(camif, mf, fmt->pad);
1313
1314 if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
1315 mf = v4l2_subdev_get_try_format(sd, cfg, fmt->pad);
1316 *mf = fmt->format;
1317 mutex_unlock(&camif->lock);
1318 return 0;
1319 }
1320
1321 switch (fmt->pad) {
1322 case CAMIF_SD_PAD_SINK:
1323 camif->mbus_fmt = *mf;
1324 /* Reset sink crop rectangle. */
1325 crop->width = mf->width;
1326 crop->height = mf->height;
1327 crop->left = 0;
1328 crop->top = 0;
1329 /*
1330 * Reset source format (the camif's crop rectangle)
1331 * and the video output resolution.
1332 */
1333 for (i = 0; i < CAMIF_VP_NUM; i++) {
1334 struct camif_frame *frame = &camif->vp[i].out_frame;
1335 frame->rect = *crop;
1336 frame->f_width = mf->width;
1337 frame->f_height = mf->height;
1338 }
1339 break;
1340
1341 case CAMIF_SD_PAD_SOURCE_C...CAMIF_SD_PAD_SOURCE_P:
1342 /* Pixel format can be only changed on the sink pad. */
1343 mf->code = camif->mbus_fmt.code;
1344 mf->width = crop->width;
1345 mf->height = crop->height;
1346 break;
1347 }
1348
1349 mutex_unlock(&camif->lock);
1350 return 0;
1351 }
1352
1353 static int s3c_camif_subdev_get_selection(struct v4l2_subdev *sd,
1354 struct v4l2_subdev_pad_config *cfg,
1355 struct v4l2_subdev_selection *sel)
1356 {
1357 struct camif_dev *camif = v4l2_get_subdevdata(sd);
1358 struct v4l2_rect *crop = &camif->camif_crop;
1359 struct v4l2_mbus_framefmt *mf = &camif->mbus_fmt;
1360
1361 if ((sel->target != V4L2_SEL_TGT_CROP &&
1362 sel->target != V4L2_SEL_TGT_CROP_BOUNDS) ||
1363 sel->pad != CAMIF_SD_PAD_SINK)
1364 return -EINVAL;
1365
1366 if (sel->which == V4L2_SUBDEV_FORMAT_TRY) {
1367 sel->r = *v4l2_subdev_get_try_crop(sd, cfg, sel->pad);
1368 return 0;
1369 }
1370
1371 mutex_lock(&camif->lock);
1372
1373 if (sel->target == V4L2_SEL_TGT_CROP) {
1374 sel->r = *crop;
1375 } else { /* crop bounds */
1376 sel->r.width = mf->width;
1377 sel->r.height = mf->height;
1378 sel->r.left = 0;
1379 sel->r.top = 0;
1380 }
1381
1382 mutex_unlock(&camif->lock);
1383
1384 v4l2_dbg(1, debug, sd, "%s: crop: (%d,%d) %dx%d, size: %ux%u\n",
1385 __func__, crop->left, crop->top, crop->width,
1386 crop->height, mf->width, mf->height);
1387
1388 return 0;
1389 }
1390
1391 static void __camif_try_crop(struct camif_dev *camif, struct v4l2_rect *r)
1392 {
1393 struct v4l2_mbus_framefmt *mf = &camif->mbus_fmt;
1394 const struct camif_pix_limits *pix_lim = &camif->variant->pix_limits;
1395 unsigned int left = 2 * r->left;
1396 unsigned int top = 2 * r->top;
1397
1398 /*
1399 * Following constraints must be met:
1400 * - r->width + 2 * r->left = mf->width;
1401 * - r->height + 2 * r->top = mf->height;
1402 * - crop rectangle size and position must be aligned
1403 * to 8 or 2 pixels, depending on SoC version.
1404 */
1405 v4l_bound_align_image(&r->width, 0, mf->width,
1406 ffs(pix_lim->win_hor_offset_align) - 1,
1407 &r->height, 0, mf->height, 1, 0);
1408
1409 v4l_bound_align_image(&left, 0, mf->width - r->width,
1410 ffs(pix_lim->win_hor_offset_align),
1411 &top, 0, mf->height - r->height, 2, 0);
1412
1413 r->left = left / 2;
1414 r->top = top / 2;
1415 r->width = mf->width - left;
1416 r->height = mf->height - top;
1417 /*
1418 * Make sure we either downscale or upscale both the pixel
1419 * width and height. Just return current crop rectangle if
1420 * this scaler constraint is not met.
1421 */
1422 if (camif->variant->ip_revision == S3C244X_CAMIF_IP_REV &&
1423 camif_is_streaming(camif)) {
1424 unsigned int i;
1425
1426 for (i = 0; i < CAMIF_VP_NUM; i++) {
1427 struct v4l2_rect *or = &camif->vp[i].out_frame.rect;
1428 if ((or->width > r->width) == (or->height > r->height))
1429 continue;
1430 *r = camif->camif_crop;
1431 pr_debug("Width/height scaling direction limitation\n");
1432 break;
1433 }
1434 }
1435
1436 v4l2_dbg(1, debug, &camif->v4l2_dev, "crop: (%d,%d)/%dx%d, fmt: %ux%u\n",
1437 r->left, r->top, r->width, r->height, mf->width, mf->height);
1438 }
1439
1440 static int s3c_camif_subdev_set_selection(struct v4l2_subdev *sd,
1441 struct v4l2_subdev_pad_config *cfg,
1442 struct v4l2_subdev_selection *sel)
1443 {
1444 struct camif_dev *camif = v4l2_get_subdevdata(sd);
1445 struct v4l2_rect *crop = &camif->camif_crop;
1446 struct camif_scaler scaler;
1447
1448 if (sel->target != V4L2_SEL_TGT_CROP || sel->pad != CAMIF_SD_PAD_SINK)
1449 return -EINVAL;
1450
1451 mutex_lock(&camif->lock);
1452 __camif_try_crop(camif, &sel->r);
1453
1454 if (sel->which == V4L2_SUBDEV_FORMAT_TRY) {
1455 *v4l2_subdev_get_try_crop(sd, cfg, sel->pad) = sel->r;
1456 } else {
1457 unsigned long flags;
1458 unsigned int i;
1459
1460 spin_lock_irqsave(&camif->slock, flags);
1461 *crop = sel->r;
1462
1463 for (i = 0; i < CAMIF_VP_NUM; i++) {
1464 struct camif_vp *vp = &camif->vp[i];
1465 scaler = vp->scaler;
1466 if (s3c_camif_get_scaler_config(vp, &scaler))
1467 continue;
1468 vp->scaler = scaler;
1469 vp->state |= ST_VP_CONFIG;
1470 }
1471
1472 spin_unlock_irqrestore(&camif->slock, flags);
1473 }
1474 mutex_unlock(&camif->lock);
1475
1476 v4l2_dbg(1, debug, sd, "%s: (%d,%d) %dx%d, f_w: %u, f_h: %u\n",
1477 __func__, crop->left, crop->top, crop->width, crop->height,
1478 camif->mbus_fmt.width, camif->mbus_fmt.height);
1479
1480 return 0;
1481 }
1482
1483 static const struct v4l2_subdev_pad_ops s3c_camif_subdev_pad_ops = {
1484 .enum_mbus_code = s3c_camif_subdev_enum_mbus_code,
1485 .get_selection = s3c_camif_subdev_get_selection,
1486 .set_selection = s3c_camif_subdev_set_selection,
1487 .get_fmt = s3c_camif_subdev_get_fmt,
1488 .set_fmt = s3c_camif_subdev_set_fmt,
1489 };
1490
1491 static const struct v4l2_subdev_ops s3c_camif_subdev_ops = {
1492 .pad = &s3c_camif_subdev_pad_ops,
1493 };
1494
1495 static int s3c_camif_subdev_s_ctrl(struct v4l2_ctrl *ctrl)
1496 {
1497 struct camif_dev *camif = container_of(ctrl->handler, struct camif_dev,
1498 ctrl_handler);
1499 unsigned long flags;
1500
1501 spin_lock_irqsave(&camif->slock, flags);
1502
1503 switch (ctrl->id) {
1504 case V4L2_CID_COLORFX:
1505 camif->colorfx = camif->ctrl_colorfx->val;
1506 /* Set Cb, Cr */
1507 switch (ctrl->val) {
1508 case V4L2_COLORFX_SEPIA:
1509 camif->colorfx_cb = 115;
1510 camif->colorfx_cr = 145;
1511 break;
1512 case V4L2_COLORFX_SET_CBCR:
1513 camif->colorfx_cb = camif->ctrl_colorfx_cbcr->val >> 8;
1514 camif->colorfx_cr = camif->ctrl_colorfx_cbcr->val & 0xff;
1515 break;
1516 default:
1517 /* for V4L2_COLORFX_BW and others */
1518 camif->colorfx_cb = 128;
1519 camif->colorfx_cr = 128;
1520 }
1521 break;
1522 case V4L2_CID_TEST_PATTERN:
1523 camif->test_pattern = camif->ctrl_test_pattern->val;
1524 break;
1525 default:
1526 WARN_ON(1);
1527 }
1528
1529 camif->vp[VP_CODEC].state |= ST_VP_CONFIG;
1530 camif->vp[VP_PREVIEW].state |= ST_VP_CONFIG;
1531 spin_unlock_irqrestore(&camif->slock, flags);
1532
1533 return 0;
1534 }
1535
1536 static const struct v4l2_ctrl_ops s3c_camif_subdev_ctrl_ops = {
1537 .s_ctrl = s3c_camif_subdev_s_ctrl,
1538 };
1539
1540 static const char * const s3c_camif_test_pattern_menu[] = {
1541 "Disabled",
1542 "Color bars",
1543 "Horizontal increment",
1544 "Vertical increment",
1545 };
1546
1547 int s3c_camif_create_subdev(struct camif_dev *camif)
1548 {
1549 struct v4l2_ctrl_handler *handler = &camif->ctrl_handler;
1550 struct v4l2_subdev *sd = &camif->subdev;
1551 int ret;
1552
1553 v4l2_subdev_init(sd, &s3c_camif_subdev_ops);
1554 sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
1555 strlcpy(sd->name, "S3C-CAMIF", sizeof(sd->name));
1556
1557 camif->pads[CAMIF_SD_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
1558 camif->pads[CAMIF_SD_PAD_SOURCE_C].flags = MEDIA_PAD_FL_SOURCE;
1559 camif->pads[CAMIF_SD_PAD_SOURCE_P].flags = MEDIA_PAD_FL_SOURCE;
1560
1561 ret = media_entity_pads_init(&sd->entity, CAMIF_SD_PADS_NUM,
1562 camif->pads);
1563 if (ret)
1564 return ret;
1565
1566 v4l2_ctrl_handler_init(handler, 3);
1567 camif->ctrl_test_pattern = v4l2_ctrl_new_std_menu_items(handler,
1568 &s3c_camif_subdev_ctrl_ops, V4L2_CID_TEST_PATTERN,
1569 ARRAY_SIZE(s3c_camif_test_pattern_menu) - 1, 0, 0,
1570 s3c_camif_test_pattern_menu);
1571
1572 if (camif->variant->has_img_effect) {
1573 camif->ctrl_colorfx = v4l2_ctrl_new_std_menu(handler,
1574 &s3c_camif_subdev_ctrl_ops,
1575 V4L2_CID_COLORFX, V4L2_COLORFX_SET_CBCR,
1576 ~0x981f, V4L2_COLORFX_NONE);
1577
1578 camif->ctrl_colorfx_cbcr = v4l2_ctrl_new_std(handler,
1579 &s3c_camif_subdev_ctrl_ops,
1580 V4L2_CID_COLORFX_CBCR, 0, 0xffff, 1, 0);
1581 }
1582
1583 if (handler->error) {
1584 v4l2_ctrl_handler_free(handler);
1585 media_entity_cleanup(&sd->entity);
1586 return handler->error;
1587 }
1588
1589 if (camif->variant->has_img_effect)
1590 v4l2_ctrl_auto_cluster(2, &camif->ctrl_colorfx,
1591 V4L2_COLORFX_SET_CBCR, false);
1592
1593 sd->ctrl_handler = handler;
1594 v4l2_set_subdevdata(sd, camif);
1595
1596 return 0;
1597 }
1598
1599 void s3c_camif_unregister_subdev(struct camif_dev *camif)
1600 {
1601 struct v4l2_subdev *sd = &camif->subdev;
1602
1603 /* Return if not registered */
1604 if (v4l2_get_subdevdata(sd) == NULL)
1605 return;
1606
1607 v4l2_device_unregister_subdev(sd);
1608 media_entity_cleanup(&sd->entity);
1609 v4l2_ctrl_handler_free(&camif->ctrl_handler);
1610 v4l2_set_subdevdata(sd, NULL);
1611 }
1612
1613 int s3c_camif_set_defaults(struct camif_dev *camif)
1614 {
1615 unsigned int ip_rev = camif->variant->ip_revision;
1616 int i;
1617
1618 for (i = 0; i < CAMIF_VP_NUM; i++) {
1619 struct camif_vp *vp = &camif->vp[i];
1620 struct camif_frame *f = &vp->out_frame;
1621
1622 vp->camif = camif;
1623 vp->id = i;
1624 vp->offset = camif->variant->vp_offset;
1625
1626 if (ip_rev == S3C244X_CAMIF_IP_REV)
1627 vp->fmt_flags = i ? FMT_FL_S3C24XX_PREVIEW :
1628 FMT_FL_S3C24XX_CODEC;
1629 else
1630 vp->fmt_flags = FMT_FL_S3C64XX;
1631
1632 vp->out_fmt = s3c_camif_find_format(vp, NULL, 0);
1633 BUG_ON(vp->out_fmt == NULL);
1634
1635 memset(f, 0, sizeof(*f));
1636 f->f_width = CAMIF_DEF_WIDTH;
1637 f->f_height = CAMIF_DEF_HEIGHT;
1638 f->rect.width = CAMIF_DEF_WIDTH;
1639 f->rect.height = CAMIF_DEF_HEIGHT;
1640
1641 /* Scaler is always enabled */
1642 vp->scaler.enable = 1;
1643
1644 vp->payload = (f->f_width * f->f_height *
1645 vp->out_fmt->depth) / 8;
1646 }
1647
1648 memset(&camif->mbus_fmt, 0, sizeof(camif->mbus_fmt));
1649 camif->mbus_fmt.width = CAMIF_DEF_WIDTH;
1650 camif->mbus_fmt.height = CAMIF_DEF_HEIGHT;
1651 camif->mbus_fmt.code = camif_mbus_formats[0];
1652
1653 memset(&camif->camif_crop, 0, sizeof(camif->camif_crop));
1654 camif->camif_crop.width = CAMIF_DEF_WIDTH;
1655 camif->camif_crop.height = CAMIF_DEF_HEIGHT;
1656
1657 return 0;
1658 }
CRIS linux kernel tree