projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
[media] v4l: Rename vb2_queue.timestamp_type as timestamp_flags
[deliverable/linux.git] / drivers / media / platform / s3c-camif / camif-capture.c
CommitLineData
babde1c2
SN		 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
43static int debug;
44module_param(debug, int, 0644);
45
46/* Locking: called with vp->camif->slock spinlock held */
47static 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
56static 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 */
68static 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 */
98static 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
113static 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
129static 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 */
150static 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
183static 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
196static 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
208static 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
242static 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: %#x cb: %#x cr: %#x\n",
284 paddr->y, paddr->cb, paddr->cr);
285
286 return 0;
287}
288
289irqreturn_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 }
376unlock:
377 spin_unlock(&camif->slock);
378 return IRQ_HANDLED;
379}
380
381static 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
438static int stop_streaming(struct vb2_queue *vq)
439{
440 struct camif_vp *vp = vb2_get_drv_priv(vq);
441 return camif_stop_capture(vp);
442}
443
444static 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
477static 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
494static 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
539static void camif_lock(struct vb2_queue *vq)
540{
541 struct camif_vp *vp = vb2_get_drv_priv(vq);
542 mutex_lock(&vp->camif->lock);
543}
544
545static void camif_unlock(struct vb2_queue *vq)
546{
547 struct camif_vp *vp = vb2_get_drv_priv(vq);
548 mutex_unlock(&vp->camif->lock);
549}
550
551static const struct vb2_ops s3c_camif_qops = {
552 .queue_setup = queue_setup,
553 .buf_prepare = buffer_prepare,
554 .buf_queue = buffer_queue,
555 .wait_prepare = camif_unlock,
556 .wait_finish = camif_lock,
557 .start_streaming = start_streaming,
558 .stop_streaming = stop_streaming,
559};
560
561static int s3c_camif_open(struct file *file)
562{
563 struct camif_vp *vp = video_drvdata(file);
564 struct camif_dev *camif = vp->camif;
565 int ret;
566
567 pr_debug("[vp%d] state: %#x, owner: %p, pid: %d\n", vp->id,
568 vp->state, vp->owner, task_pid_nr(current));
569
570 if (mutex_lock_interruptible(&camif->lock))
571 return -ERESTARTSYS;
572
573 ret = v4l2_fh_open(file);
574 if (ret < 0)
575 goto unlock;
576
577 ret = pm_runtime_get_sync(camif->dev);
578 if (ret < 0)
579 goto err_pm;
580
581 ret = sensor_set_power(camif, 1);
582 if (!ret)
583 goto unlock;
584
585 pm_runtime_put(camif->dev);
586err_pm:
587 v4l2_fh_release(file);
588unlock:
589 mutex_unlock(&camif->lock);
590 return ret;
591}
592
593static int s3c_camif_close(struct file *file)
594{
595 struct camif_vp *vp = video_drvdata(file);
596 struct camif_dev *camif = vp->camif;
597 int ret;
598
599 pr_debug("[vp%d] state: %#x, owner: %p, pid: %d\n", vp->id,
600 vp->state, vp->owner, task_pid_nr(current));
601
602 mutex_lock(&camif->lock);
603
604 if (vp->owner == file->private_data) {
605 camif_stop_capture(vp);
606 vb2_queue_release(&vp->vb_queue);
607 vp->owner = NULL;
608 }
609
610 sensor_set_power(camif, 0);
611
612 pm_runtime_put(camif->dev);
613 ret = v4l2_fh_release(file);
614
615 mutex_unlock(&camif->lock);
616 return ret;
617}
618
619static unsigned int s3c_camif_poll(struct file *file,
620 struct poll_table_struct *wait)
621{
622 struct camif_vp *vp = video_drvdata(file);
623 struct camif_dev *camif = vp->camif;
624 int ret;
625
626 mutex_lock(&camif->lock);
627 if (vp->owner && vp->owner != file->private_data)
628 ret = -EBUSY;
629 else
630 ret = vb2_poll(&vp->vb_queue, file, wait);
631
632 mutex_unlock(&camif->lock);
633 return ret;
634}
635
636static int s3c_camif_mmap(struct file *file, struct vm_area_struct *vma)
637{
638 struct camif_vp *vp = video_drvdata(file);
639 int ret;
640
641 if (vp->owner && vp->owner != file->private_data)
642 ret = -EBUSY;
643 else
644 ret = vb2_mmap(&vp->vb_queue, vma);
645
646 return ret;
647}
648
649static const struct v4l2_file_operations s3c_camif_fops = {
650 .owner = THIS_MODULE,
651 .open = s3c_camif_open,
652 .release = s3c_camif_close,
653 .poll = s3c_camif_poll,
654 .unlocked_ioctl = video_ioctl2,
655 .mmap = s3c_camif_mmap,
656};
657
658/*
659 * Video node IOCTLs
660 */
661
662static int s3c_camif_vidioc_querycap(struct file *file, void *priv,
663 struct v4l2_capability *cap)
664{
665 struct camif_vp *vp = video_drvdata(file);
666
667 strlcpy(cap->driver, S3C_CAMIF_DRIVER_NAME, sizeof(cap->driver));
668 strlcpy(cap->card, S3C_CAMIF_DRIVER_NAME, sizeof(cap->card));
669 snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s.%d",
670 dev_name(vp->camif->dev), vp->id);
671
672 cap->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_CAPTURE;
673 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
674
675 return 0;
676}
677
678static int s3c_camif_vidioc_enum_input(struct file *file, void *priv,
679 struct v4l2_input *input)
680{
681 struct camif_vp *vp = video_drvdata(file);
682 struct v4l2_subdev *sensor = vp->camif->sensor.sd;
683
684 if (input->index || sensor == NULL)
685 return -EINVAL;
686
687 input->type = V4L2_INPUT_TYPE_CAMERA;
688 strlcpy(input->name, sensor->name, sizeof(input->name));
689 return 0;
690}
691
692static int s3c_camif_vidioc_s_input(struct file *file, void *priv,
693 unsigned int i)
694{
695 return i == 0 ? 0 : -EINVAL;
696}
697
698static int s3c_camif_vidioc_g_input(struct file *file, void *priv,
699 unsigned int *i)
700{
701 *i = 0;
702 return 0;
703}
704
705static int s3c_camif_vidioc_enum_fmt(struct file *file, void *priv,
706 struct v4l2_fmtdesc *f)
707{
708 struct camif_vp *vp = video_drvdata(file);
709 const struct camif_fmt *fmt;
710
711 fmt = s3c_camif_find_format(vp, NULL, f->index);
712 if (!fmt)
713 return -EINVAL;
714
715 strlcpy(f->description, fmt->name, sizeof(f->description));
716 f->pixelformat = fmt->fourcc;
717
718 pr_debug("fmt(%d): %s\n", f->index, f->description);
719 return 0;
720}
721
722static int s3c_camif_vidioc_g_fmt(struct file *file, void *priv,
723 struct v4l2_format *f)
724{
725 struct camif_vp *vp = video_drvdata(file);
726 struct v4l2_pix_format *pix = &f->fmt.pix;
727 struct camif_frame *frame = &vp->out_frame;
728 const struct camif_fmt *fmt = vp->out_fmt;
729
730 pix->bytesperline = frame->f_width * fmt->ybpp;
731 pix->sizeimage = vp->payload;
732
733 pix->pixelformat = fmt->fourcc;
734 pix->width = frame->f_width;
735 pix->height = frame->f_height;
736 pix->field = V4L2_FIELD_NONE;
737 pix->colorspace = V4L2_COLORSPACE_JPEG;
738
739 return 0;
740}
741
742static int __camif_video_try_format(struct camif_vp *vp,
743 struct v4l2_pix_format *pix,
744 const struct camif_fmt **ffmt)
745{
746 struct camif_dev *camif = vp->camif;
747 struct v4l2_rect *crop = &camif->camif_crop;
748 unsigned int wmin, hmin, sc_hrmax, sc_vrmax;
749 const struct vp_pix_limits *pix_lim;
750 const struct camif_fmt *fmt;
751
752 fmt = s3c_camif_find_format(vp, &pix->pixelformat, 0);
753
754 if (WARN_ON(fmt == NULL))
755 return -EINVAL;
756
757 if (ffmt)
758 *ffmt = fmt;
759
760 pix_lim = &camif->variant->vp_pix_limits[vp->id];
761
762 pr_debug("fmt: %ux%u, crop: %ux%u, bytesperline: %u\n",
763 pix->width, pix->height, crop->width, crop->height,
764 pix->bytesperline);
765 /*
766 * Calculate minimum width and height according to the configured
767 * camera input interface crop rectangle and the resizer's capabilities.
768 */
769 sc_hrmax = min(SCALER_MAX_RATIO, 1 << (ffs(crop->width) - 3));
770 sc_vrmax = min(SCALER_MAX_RATIO, 1 << (ffs(crop->height) - 1));
771
772 wmin = max_t(u32, pix_lim->min_out_width, crop->width / sc_hrmax);
773 wmin = round_up(wmin, pix_lim->out_width_align);
774 hmin = max_t(u32, 8, crop->height / sc_vrmax);
775 hmin = round_up(hmin, 8);
776
777 v4l_bound_align_image(&pix->width, wmin, pix_lim->max_sc_out_width,
778 ffs(pix_lim->out_width_align) - 1,
779 &pix->height, hmin, pix_lim->max_height, 0, 0);
780
781 pix->bytesperline = pix->width * fmt->ybpp;
782 pix->sizeimage = (pix->width * pix->height * fmt->depth) / 8;
783 pix->pixelformat = fmt->fourcc;
784 pix->colorspace = V4L2_COLORSPACE_JPEG;
785 pix->field = V4L2_FIELD_NONE;
786
787 pr_debug("%ux%u, wmin: %d, hmin: %d, sc_hrmax: %d, sc_vrmax: %d\n",
788 pix->width, pix->height, wmin, hmin, sc_hrmax, sc_vrmax);
789
790 return 0;
791}
792
793static int s3c_camif_vidioc_try_fmt(struct file *file, void *priv,
794 struct v4l2_format *f)
795{
796 struct camif_vp *vp = video_drvdata(file);
797 return __camif_video_try_format(vp, &f->fmt.pix, NULL);
798}
799
800static int s3c_camif_vidioc_s_fmt(struct file *file, void *priv,
801 struct v4l2_format *f)
802{
803 struct v4l2_pix_format *pix = &f->fmt.pix;
804 struct camif_vp *vp = video_drvdata(file);
805 struct camif_frame *out_frame = &vp->out_frame;
806 const struct camif_fmt *fmt = NULL;
807 int ret;
808
809 pr_debug("[vp%d]\n", vp->id);
810
811 if (vb2_is_busy(&vp->vb_queue))
812 return -EBUSY;
813
814 ret = __camif_video_try_format(vp, &f->fmt.pix, &fmt);
815 if (ret < 0)
816 return ret;
817
818 vp->out_fmt = fmt;
819 vp->payload = pix->sizeimage;
820 out_frame->f_width = pix->width;
821 out_frame->f_height = pix->height;
822
823 /* Reset composition rectangle */
824 out_frame->rect.width = pix->width;
825 out_frame->rect.height = pix->height;
826 out_frame->rect.left = 0;
827 out_frame->rect.top = 0;
828
829 if (vp->owner == NULL)
830 vp->owner = priv;
831
832 pr_debug("%ux%u. payload: %u. fmt: %s. %d %d. sizeimage: %d. bpl: %d\n",
833 out_frame->f_width, out_frame->f_height, vp->payload, fmt->name,
834 pix->width * pix->height * fmt->depth, fmt->depth,
835 pix->sizeimage, pix->bytesperline);
836
837 return 0;
838}
839
840/* Only check pixel formats at the sensor and the camif subdev pads */
841static int camif_pipeline_validate(struct camif_dev *camif)
842{
843 struct v4l2_subdev_format src_fmt;
844 struct media_pad *pad;
845 int ret;
846
847 /* Retrieve format at the sensor subdev source pad */
1bddf1b3 848 pad = media_entity_remote_pad(&camif->pads[0]);
babde1c2
SN		 849 if (!pad || media_entity_type(pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
850 return -EPIPE;
851
852 src_fmt.pad = pad->index;
853 src_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
854 ret = v4l2_subdev_call(camif->sensor.sd, pad, get_fmt, NULL, &src_fmt);
855 if (ret < 0 && ret != -ENOIOCTLCMD)
856 return -EPIPE;
857
858 if (src_fmt.format.width != camif->mbus_fmt.width ||
859 src_fmt.format.height != camif->mbus_fmt.height ||
860 src_fmt.format.code != camif->mbus_fmt.code)
861 return -EPIPE;
862
863 return 0;
864}
865
866static int s3c_camif_streamon(struct file *file, void *priv,
867 enum v4l2_buf_type type)
868{
869 struct camif_vp *vp = video_drvdata(file);
870 struct camif_dev *camif = vp->camif;
871 struct media_entity *sensor = &camif->sensor.sd->entity;
872 int ret;
873
874 pr_debug("[vp%d]\n", vp->id);
875
876 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
877 return -EINVAL;
878
879 if (vp->owner && vp->owner != priv)
880 return -EBUSY;
881
882 if (s3c_vp_active(vp))
883 return 0;
884
885 ret = media_entity_pipeline_start(sensor, camif->m_pipeline);
886 if (ret < 0)
887 return ret;
888
889 ret = camif_pipeline_validate(camif);
890 if (ret < 0) {
891 media_entity_pipeline_stop(sensor);
892 return ret;
893 }
894
895 return vb2_streamon(&vp->vb_queue, type);
896}
897
898static int s3c_camif_streamoff(struct file *file, void *priv,
899 enum v4l2_buf_type type)
900{
901 struct camif_vp *vp = video_drvdata(file);
902 struct camif_dev *camif = vp->camif;
903 int ret;
904
905 pr_debug("[vp%d]\n", vp->id);
906
907 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
908 return -EINVAL;
909
910 if (vp->owner && vp->owner != priv)
911 return -EBUSY;
912
913 ret = vb2_streamoff(&vp->vb_queue, type);
914 if (ret == 0)
915 media_entity_pipeline_stop(&camif->sensor.sd->entity);
916 return ret;
917}
918
919static int s3c_camif_reqbufs(struct file *file, void *priv,
920 struct v4l2_requestbuffers *rb)
921{
922 struct camif_vp *vp = video_drvdata(file);
923 int ret;
924
925 pr_debug("[vp%d] rb count: %d, owner: %p, priv: %p\n",
926 vp->id, rb->count, vp->owner, priv);
927
928 if (vp->owner && vp->owner != priv)
929 return -EBUSY;
930
931 if (rb->count)
932 rb->count = max_t(u32, CAMIF_REQ_BUFS_MIN, rb->count);
933 else
934 vp->owner = NULL;
935
936 ret = vb2_reqbufs(&vp->vb_queue, rb);
69b95a3a
SN		 937 if (ret < 0)
938 return ret;
939
940 if (rb->count && rb->count < CAMIF_REQ_BUFS_MIN) {
941 rb->count = 0;
942 vb2_reqbufs(&vp->vb_queue, rb);
943 ret = -ENOMEM;
babde1c2
SN		 944 }
945
69b95a3a
SN		 946 vp->reqbufs_count = rb->count;
947 if (vp->owner == NULL && rb->count > 0)
948 vp->owner = priv;
949
babde1c2
SN		 950 return ret;
951}
952
953static int s3c_camif_querybuf(struct file *file, void *priv,
954 struct v4l2_buffer *buf)
955{
956 struct camif_vp *vp = video_drvdata(file);
957 return vb2_querybuf(&vp->vb_queue, buf);
958}
959
960static int s3c_camif_qbuf(struct file *file, void *priv,
961 struct v4l2_buffer *buf)
962{
963 struct camif_vp *vp = video_drvdata(file);
964
965 pr_debug("[vp%d]\n", vp->id);
966
967 if (vp->owner && vp->owner != priv)
968 return -EBUSY;
969
970 return vb2_qbuf(&vp->vb_queue, buf);
971}
972
973static int s3c_camif_dqbuf(struct file *file, void *priv,
974 struct v4l2_buffer *buf)
975{
976 struct camif_vp *vp = video_drvdata(file);
977
978 pr_debug("[vp%d] sequence: %d\n", vp->id, vp->frame_sequence);
979
980 if (vp->owner && vp->owner != priv)
981 return -EBUSY;
982
983 return vb2_dqbuf(&vp->vb_queue, buf, file->f_flags & O_NONBLOCK);
984}
985
986static int s3c_camif_create_bufs(struct file *file, void *priv,
987 struct v4l2_create_buffers *create)
988{
989 struct camif_vp *vp = video_drvdata(file);
990 int ret;
991
992 if (vp->owner && vp->owner != priv)
993 return -EBUSY;
994
995 create->count = max_t(u32, 1, create->count);
996 ret = vb2_create_bufs(&vp->vb_queue, create);
997
998 if (!ret && vp->owner == NULL)
999 vp->owner = priv;
1000
1001 return ret;
1002}
1003
1004static int s3c_camif_prepare_buf(struct file *file, void *priv,
1005 struct v4l2_buffer *b)
1006{
1007 struct camif_vp *vp = video_drvdata(file);
1008 return vb2_prepare_buf(&vp->vb_queue, b);
1009}
1010
1011static int s3c_camif_g_selection(struct file *file, void *priv,
1012 struct v4l2_selection *sel)
1013{
1014 struct camif_vp *vp = video_drvdata(file);
1015
1016 if (sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1017 return -EINVAL;
1018
1019 switch (sel->target) {
1020 case V4L2_SEL_TGT_COMPOSE_BOUNDS:
1021 case V4L2_SEL_TGT_COMPOSE_DEFAULT:
1022 sel->r.left = 0;
1023 sel->r.top = 0;
1024 sel->r.width = vp->out_frame.f_width;
1025 sel->r.height = vp->out_frame.f_height;
1026 return 0;
1027
1028 case V4L2_SEL_TGT_COMPOSE:
1029 sel->r = vp->out_frame.rect;
1030 return 0;
1031 }
1032
1033 return -EINVAL;
1034}
1035
1036static void __camif_try_compose(struct camif_dev *camif, struct camif_vp *vp,
1037 struct v4l2_rect *r)
1038{
1039 /* s3c244x doesn't support composition */
1040 if (camif->variant->ip_revision == S3C244X_CAMIF_IP_REV) {
1041 *r = vp->out_frame.rect;
1042 return;
1043 }
1044
1045 /* TODO: s3c64xx */
1046}
1047
1048static int s3c_camif_s_selection(struct file *file, void *priv,
1049 struct v4l2_selection *sel)
1050{
1051 struct camif_vp *vp = video_drvdata(file);
1052 struct camif_dev *camif = vp->camif;
1053 struct v4l2_rect rect = sel->r;
1054 unsigned long flags;
1055
1056 if (sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1057 sel->target != V4L2_SEL_TGT_COMPOSE)
1058 return -EINVAL;
1059
1060 __camif_try_compose(camif, vp, &rect);
1061
1062 sel->r = rect;
1063 spin_lock_irqsave(&camif->slock, flags);
1064 vp->out_frame.rect = rect;
1065 vp->state |= ST_VP_CONFIG;
1066 spin_unlock_irqrestore(&camif->slock, flags);
1067
1068 pr_debug("type: %#x, target: %#x, flags: %#x, (%d,%d)/%dx%d\n",
1069 sel->type, sel->target, sel->flags,
1070 sel->r.left, sel->r.top, sel->r.width, sel->r.height);
1071
1072 return 0;
1073}
1074
1075static const struct v4l2_ioctl_ops s3c_camif_ioctl_ops = {
1076 .vidioc_querycap = s3c_camif_vidioc_querycap,
1077 .vidioc_enum_input = s3c_camif_vidioc_enum_input,
1078 .vidioc_g_input = s3c_camif_vidioc_g_input,
1079 .vidioc_s_input = s3c_camif_vidioc_s_input,
1080 .vidioc_enum_fmt_vid_cap = s3c_camif_vidioc_enum_fmt,
1081 .vidioc_try_fmt_vid_cap = s3c_camif_vidioc_try_fmt,
1082 .vidioc_s_fmt_vid_cap = s3c_camif_vidioc_s_fmt,
1083 .vidioc_g_fmt_vid_cap = s3c_camif_vidioc_g_fmt,
1084 .vidioc_g_selection = s3c_camif_g_selection,
1085 .vidioc_s_selection = s3c_camif_s_selection,
1086 .vidioc_reqbufs = s3c_camif_reqbufs,
1087 .vidioc_querybuf = s3c_camif_querybuf,
1088 .vidioc_prepare_buf = s3c_camif_prepare_buf,
1089 .vidioc_create_bufs = s3c_camif_create_bufs,
1090 .vidioc_qbuf = s3c_camif_qbuf,
1091 .vidioc_dqbuf = s3c_camif_dqbuf,
1092 .vidioc_streamon = s3c_camif_streamon,
1093 .vidioc_streamoff = s3c_camif_streamoff,
1094 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1095 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1096 .vidioc_log_status = v4l2_ctrl_log_status,
1097};
1098
1099/*
1100 * Video node controls
1101 */
1102static int s3c_camif_video_s_ctrl(struct v4l2_ctrl *ctrl)
1103{
1104 struct camif_vp *vp = ctrl->priv;
1105 struct camif_dev *camif = vp->camif;
1106 unsigned long flags;
1107
1108 pr_debug("[vp%d] ctrl: %s, value: %d\n", vp->id,
1109 ctrl->name, ctrl->val);
1110
1111 spin_lock_irqsave(&camif->slock, flags);
1112
1113 switch (ctrl->id) {
1114 case V4L2_CID_HFLIP:
1115 vp->hflip = ctrl->val;
1116 break;
1117
1118 case V4L2_CID_VFLIP:
1119 vp->vflip = ctrl->val;
1120 break;
1121 }
1122
1123 vp->state |= ST_VP_CONFIG;
1124 spin_unlock_irqrestore(&camif->slock, flags);
1125 return 0;
1126}
1127
1128/* Codec and preview video node control ops */
1129static const struct v4l2_ctrl_ops s3c_camif_video_ctrl_ops = {
1130 .s_ctrl = s3c_camif_video_s_ctrl,
1131};
1132
1133int s3c_camif_register_video_node(struct camif_dev *camif, int idx)
1134{
1135 struct camif_vp *vp = &camif->vp[idx];
1136 struct vb2_queue *q = &vp->vb_queue;
1137 struct video_device *vfd = &vp->vdev;
1138 struct v4l2_ctrl *ctrl;
1139 int ret;
1140
1141 memset(vfd, 0, sizeof(*vfd));
1142 snprintf(vfd->name, sizeof(vfd->name), "camif-%s",
1143 vp->id == 0 ? "codec" : "preview");
1144
1145 vfd->fops = &s3c_camif_fops;
1146 vfd->ioctl_ops = &s3c_camif_ioctl_ops;
1147 vfd->v4l2_dev = &camif->v4l2_dev;
1148 vfd->minor = -1;
1149 vfd->release = video_device_release_empty;
1150 vfd->lock = &camif->lock;
1151 vp->reqbufs_count = 0;
1152
1153 INIT_LIST_HEAD(&vp->pending_buf_q);
1154 INIT_LIST_HEAD(&vp->active_buf_q);
1155
1156 memset(q, 0, sizeof(*q));
1157 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1158 q->io_modes = VB2_MMAP | VB2_USERPTR;
1159 q->ops = &s3c_camif_qops;
1160 q->mem_ops = &vb2_dma_contig_memops;
1161 q->buf_struct_size = sizeof(struct camif_buffer);
1162 q->drv_priv = vp;
ade48681 1163 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
babde1c2
SN		 1164
1165 ret = vb2_queue_init(q);
1166 if (ret)
1167 goto err_vd_rel;
1168
1169 vp->pad.flags = MEDIA_PAD_FL_SINK;
1170 ret = media_entity_init(&vfd->entity, 1, &vp->pad, 0);
1171 if (ret)
1172 goto err_vd_rel;
1173
1174 video_set_drvdata(vfd, vp);
1175 set_bit(V4L2_FL_USE_FH_PRIO, &vfd->flags);
1176
1177 v4l2_ctrl_handler_init(&vp->ctrl_handler, 1);
1178 ctrl = v4l2_ctrl_new_std(&vp->ctrl_handler, &s3c_camif_video_ctrl_ops,
1179 V4L2_CID_HFLIP, 0, 1, 1, 0);
1180 if (ctrl)
1181 ctrl->priv = vp;
1182 ctrl = v4l2_ctrl_new_std(&vp->ctrl_handler, &s3c_camif_video_ctrl_ops,
1183 V4L2_CID_VFLIP, 0, 1, 1, 0);
1184 if (ctrl)
1185 ctrl->priv = vp;
1186
1187 ret = vp->ctrl_handler.error;
1188 if (ret < 0)
1189 goto err_me_cleanup;
1190
1191 vfd->ctrl_handler = &vp->ctrl_handler;
1192
1193 ret = video_register_device(vfd, VFL_TYPE_GRABBER, -1);
1194 if (ret)
1195 goto err_ctrlh_free;
1196
1197 v4l2_info(&camif->v4l2_dev, "registered %s as /dev/%s\n",
1198 vfd->name, video_device_node_name(vfd));
1199 return 0;
1200
1201err_ctrlh_free:
1202 v4l2_ctrl_handler_free(&vp->ctrl_handler);
1203err_me_cleanup:
1204 media_entity_cleanup(&vfd->entity);
1205err_vd_rel:
1206 video_device_release(vfd);
1207 return ret;
1208}
1209
1210void s3c_camif_unregister_video_node(struct camif_dev *camif, int idx)
1211{
1212 struct video_device *vfd = &camif->vp[idx].vdev;
1213
1214 if (video_is_registered(vfd)) {
1215 video_unregister_device(vfd);
1216 media_entity_cleanup(&vfd->entity);
1217 v4l2_ctrl_handler_free(vfd->ctrl_handler);
1218 }
1219}
1220
1221/* Media bus pixel formats supported at the camif input */
1222static const enum v4l2_mbus_pixelcode camif_mbus_formats[] = {
1223 V4L2_MBUS_FMT_YUYV8_2X8,
1224 V4L2_MBUS_FMT_YVYU8_2X8,
1225 V4L2_MBUS_FMT_UYVY8_2X8,
1226 V4L2_MBUS_FMT_VYUY8_2X8,
1227};
1228
1229/*
1230 * Camera input interface subdev operations
1231 */
1232
1233static int s3c_camif_subdev_enum_mbus_code(struct v4l2_subdev *sd,
1234 struct v4l2_subdev_fh *fh,
1235 struct v4l2_subdev_mbus_code_enum *code)
1236{
1237 if (code->index >= ARRAY_SIZE(camif_mbus_formats))
1238 return -EINVAL;
1239
1240 code->code = camif_mbus_formats[code->index];
1241 return 0;
1242}
1243
1244static int s3c_camif_subdev_get_fmt(struct v4l2_subdev *sd,
1245 struct v4l2_subdev_fh *fh,
1246 struct v4l2_subdev_format *fmt)
1247{
1248 struct camif_dev *camif = v4l2_get_subdevdata(sd);
1249 struct v4l2_mbus_framefmt *mf = &fmt->format;
1250
1251 if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
1252 mf = v4l2_subdev_get_try_format(fh, fmt->pad);
1253 fmt->format = *mf;
1254 return 0;
1255 }
1256
1257 mutex_lock(&camif->lock);
1258
1259 switch (fmt->pad) {
1260 case CAMIF_SD_PAD_SINK:
1261 /* full camera input pixel size */
1262 *mf = camif->mbus_fmt;
1263 break;
1264
1265 case CAMIF_SD_PAD_SOURCE_C...CAMIF_SD_PAD_SOURCE_P:
1266 /* crop rectangle at camera interface input */
1267 mf->width = camif->camif_crop.width;
1268 mf->height = camif->camif_crop.height;
1269 mf->code = camif->mbus_fmt.code;
1270 break;
1271 }
1272
1273 mutex_unlock(&camif->lock);
1274 mf->colorspace = V4L2_COLORSPACE_JPEG;
1275 return 0;
1276}
1277
1278static void __camif_subdev_try_format(struct camif_dev *camif,
1279 struct v4l2_mbus_framefmt *mf, int pad)
1280{
1281 const struct s3c_camif_variant *variant = camif->variant;
1282 const struct vp_pix_limits *pix_lim;
1283 int i = ARRAY_SIZE(camif_mbus_formats);
1284
1285 /* FIXME: constraints against codec or preview path ? */
1286 pix_lim = &variant->vp_pix_limits[VP_CODEC];
1287
1288 while (i-- >= 0)
1289 if (camif_mbus_formats[i] == mf->code)
1290 break;
1291
1292 mf->code = camif_mbus_formats[i];
1293
1294 if (pad == CAMIF_SD_PAD_SINK) {
1295 v4l_bound_align_image(&mf->width, 8, CAMIF_MAX_PIX_WIDTH,
1296 ffs(pix_lim->out_width_align) - 1,
1297 &mf->height, 8, CAMIF_MAX_PIX_HEIGHT, 0,
1298 0);
1299 } else {
1300 struct v4l2_rect *crop = &camif->camif_crop;
1301 v4l_bound_align_image(&mf->width, 8, crop->width,
1302 ffs(pix_lim->out_width_align) - 1,
1303 &mf->height, 8, crop->height,
1304 0, 0);
1305 }
1306
1307 v4l2_dbg(1, debug, &camif->subdev, "%ux%u\n", mf->width, mf->height);
1308}
1309
1310static int s3c_camif_subdev_set_fmt(struct v4l2_subdev *sd,
1311 struct v4l2_subdev_fh *fh,
1312 struct v4l2_subdev_format *fmt)
1313{
1314 struct camif_dev *camif = v4l2_get_subdevdata(sd);
1315 struct v4l2_mbus_framefmt *mf = &fmt->format;
1316 struct v4l2_rect *crop = &camif->camif_crop;
1317 int i;
1318
1319 v4l2_dbg(1, debug, sd, "pad%d: code: 0x%x, %ux%u\n",
1320 fmt->pad, mf->code, mf->width, mf->height);
1321
1322 mf->colorspace = V4L2_COLORSPACE_JPEG;
1323 mutex_lock(&camif->lock);
1324
1325 /*
1326 * No pixel format change at the camera input is allowed
1327 * while streaming.
1328 */
1329 if (vb2_is_busy(&camif->vp[VP_CODEC].vb_queue) ||
1330 vb2_is_busy(&camif->vp[VP_PREVIEW].vb_queue)) {
1331 mutex_unlock(&camif->lock);
1332 return -EBUSY;
1333 }
1334
1335 __camif_subdev_try_format(camif, mf, fmt->pad);
1336
1337 if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
1338 mf = v4l2_subdev_get_try_format(fh, fmt->pad);
1339 *mf = fmt->format;
1340 mutex_unlock(&camif->lock);
1341 return 0;
1342 }
1343
1344 switch (fmt->pad) {
1345 case CAMIF_SD_PAD_SINK:
1346 camif->mbus_fmt = *mf;
1347 /* Reset sink crop rectangle. */
1348 crop->width = mf->width;
1349 crop->height = mf->height;
1350 crop->left = 0;
1351 crop->top = 0;
1352 /*
1353 * Reset source format (the camif's crop rectangle)
1354 * and the video output resolution.
1355 */
1356 for (i = 0; i < CAMIF_VP_NUM; i++) {
1357 struct camif_frame *frame = &camif->vp[i].out_frame;
1358 frame->rect = *crop;
1359 frame->f_width = mf->width;
1360 frame->f_height = mf->height;
1361 }
1362 break;
1363
1364 case CAMIF_SD_PAD_SOURCE_C...CAMIF_SD_PAD_SOURCE_P:
1365 /* Pixel format can be only changed on the sink pad. */
1366 mf->code = camif->mbus_fmt.code;
1367 mf->width = crop->width;
1368 mf->height = crop->height;
1369 break;
1370 }
1371
1372 mutex_unlock(&camif->lock);
1373 return 0;
1374}
1375
1376static int s3c_camif_subdev_get_selection(struct v4l2_subdev *sd,
1377 struct v4l2_subdev_fh *fh,
1378 struct v4l2_subdev_selection *sel)
1379{
1380 struct camif_dev *camif = v4l2_get_subdevdata(sd);
1381 struct v4l2_rect *crop = &camif->camif_crop;
1382 struct v4l2_mbus_framefmt *mf = &camif->mbus_fmt;
1383
1384 if ((sel->target != V4L2_SEL_TGT_CROP &&
1385 sel->target != V4L2_SEL_TGT_CROP_BOUNDS) ||
1386 sel->pad != CAMIF_SD_PAD_SINK)
1387 return -EINVAL;
1388
1389 if (sel->which == V4L2_SUBDEV_FORMAT_TRY) {
1390 sel->r = *v4l2_subdev_get_try_crop(fh, sel->pad);
1391 return 0;
1392 }
1393
1394 mutex_lock(&camif->lock);
1395
1396 if (sel->target == V4L2_SEL_TGT_CROP) {
1397 sel->r = *crop;
1398 } else { /* crop bounds */
1399 sel->r.width = mf->width;
1400 sel->r.height = mf->height;
1401 sel->r.left = 0;
1402 sel->r.top = 0;
1403 }
1404
1405 mutex_unlock(&camif->lock);
1406
1407 v4l2_dbg(1, debug, sd, "%s: crop: (%d,%d) %dx%d, size: %ux%u\n",
1408 __func__, crop->left, crop->top, crop->width,
1409 crop->height, mf->width, mf->height);
1410
1411 return 0;
1412}
1413
1414static void __camif_try_crop(struct camif_dev *camif, struct v4l2_rect *r)
1415{
1416 struct v4l2_mbus_framefmt *mf = &camif->mbus_fmt;
1417 const struct camif_pix_limits *pix_lim = &camif->variant->pix_limits;
1418 unsigned int left = 2 * r->left;
1419 unsigned int top = 2 * r->top;
1420
1421 /*
1422 * Following constraints must be met:
1423 * - r->width + 2 * r->left = mf->width;
1424 * - r->height + 2 * r->top = mf->height;
1425 * - crop rectangle size and position must be aligned
1426 * to 8 or 2 pixels, depending on SoC version.
1427 */
1428 v4l_bound_align_image(&r->width, 0, mf->width,
1429 ffs(pix_lim->win_hor_offset_align) - 1,
1430 &r->height, 0, mf->height, 1, 0);
1431
1432 v4l_bound_align_image(&left, 0, mf->width - r->width,
1433 ffs(pix_lim->win_hor_offset_align),
1434 &top, 0, mf->height - r->height, 2, 0);
1435
1436 r->left = left / 2;
1437 r->top = top / 2;
1438 r->width = mf->width - left;
1439 r->height = mf->height - top;
1440 /*
1441 * Make sure we either downscale or upscale both the pixel
1442 * width and height. Just return current crop rectangle if
1443 * this scaler constraint is not met.
1444 */
1445 if (camif->variant->ip_revision == S3C244X_CAMIF_IP_REV &&
1446 camif_is_streaming(camif)) {
1447 unsigned int i;
1448
1449 for (i = 0; i < CAMIF_VP_NUM; i++) {
1450 struct v4l2_rect *or = &camif->vp[i].out_frame.rect;
1451 if ((or->width > r->width) == (or->height > r->height))
1452 continue;
1453 *r = camif->camif_crop;
1454 pr_debug("Width/height scaling direction limitation\n");
1455 break;
1456 }
1457 }
1458
1459 v4l2_dbg(1, debug, &camif->v4l2_dev, "crop: (%d,%d)/%dx%d, fmt: %ux%u\n",
1460 r->left, r->top, r->width, r->height, mf->width, mf->height);
1461}
1462
1463static int s3c_camif_subdev_set_selection(struct v4l2_subdev *sd,
1464 struct v4l2_subdev_fh *fh,
1465 struct v4l2_subdev_selection *sel)
1466{
1467 struct camif_dev *camif = v4l2_get_subdevdata(sd);
1468 struct v4l2_rect *crop = &camif->camif_crop;
1469 struct camif_scaler scaler;
1470
1471 if (sel->target != V4L2_SEL_TGT_CROP || sel->pad != CAMIF_SD_PAD_SINK)
1472 return -EINVAL;
1473
1474 mutex_lock(&camif->lock);
1475 __camif_try_crop(camif, &sel->r);
1476
1477 if (sel->which == V4L2_SUBDEV_FORMAT_TRY) {
1478 *v4l2_subdev_get_try_crop(fh, sel->pad) = sel->r;
1479 } else {
1480 unsigned long flags;
1481 unsigned int i;
1482
1483 spin_lock_irqsave(&camif->slock, flags);
1484 *crop = sel->r;
1485
1486 for (i = 0; i < CAMIF_VP_NUM; i++) {
1487 struct camif_vp *vp = &camif->vp[i];
1488 scaler = vp->scaler;
1489 if (s3c_camif_get_scaler_config(vp, &scaler))
1490 continue;
1491 vp->scaler = scaler;
1492 vp->state |= ST_VP_CONFIG;
1493 }
1494
1495 spin_unlock_irqrestore(&camif->slock, flags);
1496 }
1497 mutex_unlock(&camif->lock);
1498
1499 v4l2_dbg(1, debug, sd, "%s: (%d,%d) %dx%d, f_w: %u, f_h: %u\n",
1500 __func__, crop->left, crop->top, crop->width, crop->height,
1501 camif->mbus_fmt.width, camif->mbus_fmt.height);
1502
1503 return 0;
1504}
1505
1506static const struct v4l2_subdev_pad_ops s3c_camif_subdev_pad_ops = {
1507 .enum_mbus_code = s3c_camif_subdev_enum_mbus_code,
1508 .get_selection = s3c_camif_subdev_get_selection,
1509 .set_selection = s3c_camif_subdev_set_selection,
1510 .get_fmt = s3c_camif_subdev_get_fmt,
1511 .set_fmt = s3c_camif_subdev_set_fmt,
1512};
1513
1514static struct v4l2_subdev_ops s3c_camif_subdev_ops = {
1515 .pad = &s3c_camif_subdev_pad_ops,
1516};
1517
1518static int s3c_camif_subdev_s_ctrl(struct v4l2_ctrl *ctrl)
1519{
1520 struct camif_dev *camif = container_of(ctrl->handler, struct camif_dev,
1521 ctrl_handler);
1522 unsigned long flags;
1523
1524 spin_lock_irqsave(&camif->slock, flags);
1525
1526 switch (ctrl->id) {
1527 case V4L2_CID_COLORFX:
1528 camif->colorfx = camif->ctrl_colorfx->val;
1529 /* Set Cb, Cr */
1530 switch (ctrl->val) {
1531 case V4L2_COLORFX_SEPIA:
1532 camif->colorfx_cb = 115;
1533 camif->colorfx_cr = 145;
1534 break;
1535 case V4L2_COLORFX_SET_CBCR:
1536 camif->colorfx_cb = camif->ctrl_colorfx_cbcr->val >> 8;
1537 camif->colorfx_cr = camif->ctrl_colorfx_cbcr->val & 0xff;
1538 break;
1539 default:
1540 /* for V4L2_COLORFX_BW and others */
1541 camif->colorfx_cb = 128;
1542 camif->colorfx_cr = 128;
1543 }
1544 break;
1545 case V4L2_CID_TEST_PATTERN:
1546 camif->test_pattern = camif->ctrl_test_pattern->val;
1547 break;
1548 default:
1549 WARN_ON(1);
1550 }
1551
1552 camif->vp[VP_CODEC].state |= ST_VP_CONFIG;
1553 camif->vp[VP_PREVIEW].state |= ST_VP_CONFIG;
1554 spin_unlock_irqrestore(&camif->slock, flags);
1555
1556 return 0;
1557}
1558
1559static const struct v4l2_ctrl_ops s3c_camif_subdev_ctrl_ops = {
1560 .s_ctrl = s3c_camif_subdev_s_ctrl,
1561};
1562
1563static const char * const s3c_camif_test_pattern_menu[] = {
1564 "Disabled",
1565 "Color bars",
1566 "Horizontal increment",
1567 "Vertical increment",
1568};
1569
1570int s3c_camif_create_subdev(struct camif_dev *camif)
1571{
1572 struct v4l2_ctrl_handler *handler = &camif->ctrl_handler;
1573 struct v4l2_subdev *sd = &camif->subdev;
1574 int ret;
1575
1576 v4l2_subdev_init(sd, &s3c_camif_subdev_ops);
1577 sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
1578 strlcpy(sd->name, "S3C-CAMIF", sizeof(sd->name));
1579
1580 camif->pads[CAMIF_SD_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
1581 camif->pads[CAMIF_SD_PAD_SOURCE_C].flags = MEDIA_PAD_FL_SOURCE;
1582 camif->pads[CAMIF_SD_PAD_SOURCE_P].flags = MEDIA_PAD_FL_SOURCE;
1583
1584 ret = media_entity_init(&sd->entity, CAMIF_SD_PADS_NUM,
1585 camif->pads, 0);
1586 if (ret)
1587 return ret;
1588
1589 v4l2_ctrl_handler_init(handler, 3);
1590 camif->ctrl_test_pattern = v4l2_ctrl_new_std_menu_items(handler,
1591 &s3c_camif_subdev_ctrl_ops, V4L2_CID_TEST_PATTERN,
1592 ARRAY_SIZE(s3c_camif_test_pattern_menu) - 1, 0, 0,
1593 s3c_camif_test_pattern_menu);
1594
7c869651
HV		 1595 if (camif->variant->has_img_effect) {
1596 camif->ctrl_colorfx = v4l2_ctrl_new_std_menu(handler,
babde1c2
SN		 1597 &s3c_camif_subdev_ctrl_ops,
1598 V4L2_CID_COLORFX, V4L2_COLORFX_SET_CBCR,
1599 ~0x981f, V4L2_COLORFX_NONE);
1600
7c869651 1601 camif->ctrl_colorfx_cbcr = v4l2_ctrl_new_std(handler,
babde1c2
SN		 1602 &s3c_camif_subdev_ctrl_ops,
1603 V4L2_CID_COLORFX_CBCR, 0, 0xffff, 1, 0);
7c869651
HV		 1604 }
1605
babde1c2
SN		 1606 if (handler->error) {
1607 v4l2_ctrl_handler_free(handler);
1608 media_entity_cleanup(&sd->entity);
1609 return handler->error;
1610 }
1611
7c869651
HV		 1612 if (camif->variant->has_img_effect)
1613 v4l2_ctrl_auto_cluster(2, &camif->ctrl_colorfx,
babde1c2 1614 V4L2_COLORFX_SET_CBCR, false);
7c869651 1615
babde1c2
SN		 1616 sd->ctrl_handler = handler;
1617 v4l2_set_subdevdata(sd, camif);
1618
1619 return 0;
1620}
1621
1622void s3c_camif_unregister_subdev(struct camif_dev *camif)
1623{
1624 struct v4l2_subdev *sd = &camif->subdev;
1625
1626 /* Return if not registered */
1627 if (v4l2_get_subdevdata(sd) == NULL)
1628 return;
1629
1630 v4l2_device_unregister_subdev(sd);
1631 media_entity_cleanup(&sd->entity);
1632 v4l2_ctrl_handler_free(&camif->ctrl_handler);
1633 v4l2_set_subdevdata(sd, NULL);
1634}
1635
1636int s3c_camif_set_defaults(struct camif_dev *camif)
1637{
1638 unsigned int ip_rev = camif->variant->ip_revision;
1639 int i;
1640
1641 for (i = 0; i < CAMIF_VP_NUM; i++) {
1642 struct camif_vp *vp = &camif->vp[i];
1643 struct camif_frame *f = &vp->out_frame;
1644
1645 vp->camif = camif;
1646 vp->id = i;
1647 vp->offset = camif->variant->vp_offset;
1648
1649 if (ip_rev == S3C244X_CAMIF_IP_REV)
1650 vp->fmt_flags = i ? FMT_FL_S3C24XX_PREVIEW :
1651 FMT_FL_S3C24XX_CODEC;
1652 else
1653 vp->fmt_flags = FMT_FL_S3C64XX;
1654
1655 vp->out_fmt = s3c_camif_find_format(vp, NULL, 0);
1656 BUG_ON(vp->out_fmt == NULL);
1657
1658 memset(f, 0, sizeof(*f));
1659 f->f_width = CAMIF_DEF_WIDTH;
1660 f->f_height = CAMIF_DEF_HEIGHT;
1661 f->rect.width = CAMIF_DEF_WIDTH;
1662 f->rect.height = CAMIF_DEF_HEIGHT;
1663
1664 /* Scaler is always enabled */
1665 vp->scaler.enable = 1;
1666
1667 vp->payload = (f->f_width * f->f_height *
1668 vp->out_fmt->depth) / 8;
1669 }
1670
1671 memset(&camif->mbus_fmt, 0, sizeof(camif->mbus_fmt));
1672 camif->mbus_fmt.width = CAMIF_DEF_WIDTH;
1673 camif->mbus_fmt.height = CAMIF_DEF_HEIGHT;
1674 camif->mbus_fmt.code = camif_mbus_formats[0];
1675
1676 memset(&camif->camif_crop, 0, sizeof(camif->camif_crop));
1677 camif->camif_crop.width = CAMIF_DEF_WIDTH;
1678 camif->camif_crop.height = CAMIF_DEF_HEIGHT;
1679
1680 return 0;
1681}
Linux kernel - Deliverables
This page took 0.263018 seconds and 5 git commands to generate.