Version:  2.0.40 2.2.26 2.4.37 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16

Linux/drivers/media/platform/exynos4-is/fimc-lite.c

  1 /*
  2  * Samsung EXYNOS FIMC-LITE (camera host interface) driver
  3 *
  4  * Copyright (C) 2012 - 2013 Samsung Electronics Co., Ltd.
  5  * Author: Sylwester Nawrocki <s.nawrocki@samsung.com>
  6  *
  7  * This program is free software; you can redistribute it and/or modify
  8  * it under the terms of the GNU General Public License version 2 as
  9  * published by the Free Software Foundation.
 10  */
 11 #define pr_fmt(fmt) "%s:%d " fmt, __func__, __LINE__
 12 
 13 #include <linux/bug.h>
 14 #include <linux/clk.h>
 15 #include <linux/device.h>
 16 #include <linux/errno.h>
 17 #include <linux/interrupt.h>
 18 #include <linux/kernel.h>
 19 #include <linux/list.h>
 20 #include <linux/module.h>
 21 #include <linux/of.h>
 22 #include <linux/types.h>
 23 #include <linux/platform_device.h>
 24 #include <linux/pm_runtime.h>
 25 #include <linux/slab.h>
 26 #include <linux/videodev2.h>
 27 
 28 #include <media/v4l2-device.h>
 29 #include <media/v4l2-ioctl.h>
 30 #include <media/v4l2-mem2mem.h>
 31 #include <media/videobuf2-core.h>
 32 #include <media/videobuf2-dma-contig.h>
 33 #include <media/exynos-fimc.h>
 34 
 35 #include "common.h"
 36 #include "fimc-core.h"
 37 #include "fimc-lite.h"
 38 #include "fimc-lite-reg.h"
 39 
 40 static int debug;
 41 module_param(debug, int, 0644);
 42 
 43 static const struct fimc_fmt fimc_lite_formats[] = {
 44         {
 45                 .name           = "YUV 4:2:2 packed, YCbYCr",
 46                 .fourcc         = V4L2_PIX_FMT_YUYV,
 47                 .colorspace     = V4L2_COLORSPACE_JPEG,
 48                 .depth          = { 16 },
 49                 .color          = FIMC_FMT_YCBYCR422,
 50                 .memplanes      = 1,
 51                 .mbus_code      = V4L2_MBUS_FMT_YUYV8_2X8,
 52                 .flags          = FMT_FLAGS_YUV,
 53         }, {
 54                 .name           = "YUV 4:2:2 packed, CbYCrY",
 55                 .fourcc         = V4L2_PIX_FMT_UYVY,
 56                 .colorspace     = V4L2_COLORSPACE_JPEG,
 57                 .depth          = { 16 },
 58                 .color          = FIMC_FMT_CBYCRY422,
 59                 .memplanes      = 1,
 60                 .mbus_code      = V4L2_MBUS_FMT_UYVY8_2X8,
 61                 .flags          = FMT_FLAGS_YUV,
 62         }, {
 63                 .name           = "YUV 4:2:2 packed, CrYCbY",
 64                 .fourcc         = V4L2_PIX_FMT_VYUY,
 65                 .colorspace     = V4L2_COLORSPACE_JPEG,
 66                 .depth          = { 16 },
 67                 .color          = FIMC_FMT_CRYCBY422,
 68                 .memplanes      = 1,
 69                 .mbus_code      = V4L2_MBUS_FMT_VYUY8_2X8,
 70                 .flags          = FMT_FLAGS_YUV,
 71         }, {
 72                 .name           = "YUV 4:2:2 packed, YCrYCb",
 73                 .fourcc         = V4L2_PIX_FMT_YVYU,
 74                 .colorspace     = V4L2_COLORSPACE_JPEG,
 75                 .depth          = { 16 },
 76                 .color          = FIMC_FMT_YCRYCB422,
 77                 .memplanes      = 1,
 78                 .mbus_code      = V4L2_MBUS_FMT_YVYU8_2X8,
 79                 .flags          = FMT_FLAGS_YUV,
 80         }, {
 81                 .name           = "RAW8 (GRBG)",
 82                 .fourcc         = V4L2_PIX_FMT_SGRBG8,
 83                 .colorspace     = V4L2_COLORSPACE_SRGB,
 84                 .depth          = { 8 },
 85                 .color          = FIMC_FMT_RAW8,
 86                 .memplanes      = 1,
 87                 .mbus_code      = V4L2_MBUS_FMT_SGRBG8_1X8,
 88                 .flags          = FMT_FLAGS_RAW_BAYER,
 89         }, {
 90                 .name           = "RAW10 (GRBG)",
 91                 .fourcc         = V4L2_PIX_FMT_SGRBG10,
 92                 .colorspace     = V4L2_COLORSPACE_SRGB,
 93                 .depth          = { 16 },
 94                 .color          = FIMC_FMT_RAW10,
 95                 .memplanes      = 1,
 96                 .mbus_code      = V4L2_MBUS_FMT_SGRBG10_1X10,
 97                 .flags          = FMT_FLAGS_RAW_BAYER,
 98         }, {
 99                 .name           = "RAW12 (GRBG)",
100                 .fourcc         = V4L2_PIX_FMT_SGRBG12,
101                 .colorspace     = V4L2_COLORSPACE_SRGB,
102                 .depth          = { 16 },
103                 .color          = FIMC_FMT_RAW12,
104                 .memplanes      = 1,
105                 .mbus_code      = V4L2_MBUS_FMT_SGRBG12_1X12,
106                 .flags          = FMT_FLAGS_RAW_BAYER,
107         },
108 };
109 
110 /**
111  * fimc_lite_find_format - lookup fimc color format by fourcc or media bus code
112  * @pixelformat: fourcc to match, ignored if null
113  * @mbus_code: media bus code to match, ignored if null
114  * @mask: the color format flags to match
115  * @index: index to the fimc_lite_formats array, ignored if negative
116  */
117 static const struct fimc_fmt *fimc_lite_find_format(const u32 *pixelformat,
118                         const u32 *mbus_code, unsigned int mask, int index)
119 {
120         const struct fimc_fmt *fmt, *def_fmt = NULL;
121         unsigned int i;
122         int id = 0;
123 
124         if (index >= (int)ARRAY_SIZE(fimc_lite_formats))
125                 return NULL;
126 
127         for (i = 0; i < ARRAY_SIZE(fimc_lite_formats); ++i) {
128                 fmt = &fimc_lite_formats[i];
129                 if (mask && !(fmt->flags & mask))
130                         continue;
131                 if (pixelformat && fmt->fourcc == *pixelformat)
132                         return fmt;
133                 if (mbus_code && fmt->mbus_code == *mbus_code)
134                         return fmt;
135                 if (index == id)
136                         def_fmt = fmt;
137                 id++;
138         }
139         return def_fmt;
140 }
141 
142 static int fimc_lite_hw_init(struct fimc_lite *fimc, bool isp_output)
143 {
144         struct fimc_source_info *si;
145         unsigned long flags;
146 
147         if (fimc->sensor == NULL)
148                 return -ENXIO;
149 
150         if (fimc->inp_frame.fmt == NULL || fimc->out_frame.fmt == NULL)
151                 return -EINVAL;
152 
153         /* Get sensor configuration data from the sensor subdev */
154         si = v4l2_get_subdev_hostdata(fimc->sensor);
155         if (!si)
156                 return -EINVAL;
157 
158         spin_lock_irqsave(&fimc->slock, flags);
159 
160         flite_hw_set_camera_bus(fimc, si);
161         flite_hw_set_source_format(fimc, &fimc->inp_frame);
162         flite_hw_set_window_offset(fimc, &fimc->inp_frame);
163         flite_hw_set_dma_buf_mask(fimc, 0);
164         flite_hw_set_output_dma(fimc, &fimc->out_frame, !isp_output);
165         flite_hw_set_interrupt_mask(fimc);
166         flite_hw_set_test_pattern(fimc, fimc->test_pattern->val);
167 
168         if (debug > 0)
169                 flite_hw_dump_regs(fimc, __func__);
170 
171         spin_unlock_irqrestore(&fimc->slock, flags);
172         return 0;
173 }
174 
175 /*
176  * Reinitialize the driver so it is ready to start the streaming again.
177  * Set fimc->state to indicate stream off and the hardware shut down state.
178  * If not suspending (@suspend is false), return any buffers to videobuf2.
179  * Otherwise put any owned buffers onto the pending buffers queue, so they
180  * can be re-spun when the device is being resumed. Also perform FIMC
181  * software reset and disable streaming on the whole pipeline if required.
182  */
183 static int fimc_lite_reinit(struct fimc_lite *fimc, bool suspend)
184 {
185         struct flite_buffer *buf;
186         unsigned long flags;
187         bool streaming;
188 
189         spin_lock_irqsave(&fimc->slock, flags);
190         streaming = fimc->state & (1 << ST_SENSOR_STREAM);
191 
192         fimc->state &= ~(1 << ST_FLITE_RUN | 1 << ST_FLITE_OFF |
193                          1 << ST_FLITE_STREAM | 1 << ST_SENSOR_STREAM);
194         if (suspend)
195                 fimc->state |= (1 << ST_FLITE_SUSPENDED);
196         else
197                 fimc->state &= ~(1 << ST_FLITE_PENDING |
198                                  1 << ST_FLITE_SUSPENDED);
199 
200         /* Release unused buffers */
201         while (!suspend && !list_empty(&fimc->pending_buf_q)) {
202                 buf = fimc_lite_pending_queue_pop(fimc);
203                 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
204         }
205         /* If suspending put unused buffers onto pending queue */
206         while (!list_empty(&fimc->active_buf_q)) {
207                 buf = fimc_lite_active_queue_pop(fimc);
208                 if (suspend)
209                         fimc_lite_pending_queue_add(fimc, buf);
210                 else
211                         vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
212         }
213 
214         spin_unlock_irqrestore(&fimc->slock, flags);
215 
216         flite_hw_reset(fimc);
217 
218         if (!streaming)
219                 return 0;
220 
221         return fimc_pipeline_call(&fimc->ve, set_stream, 0);
222 }
223 
224 static int fimc_lite_stop_capture(struct fimc_lite *fimc, bool suspend)
225 {
226         unsigned long flags;
227 
228         if (!fimc_lite_active(fimc))
229                 return 0;
230 
231         spin_lock_irqsave(&fimc->slock, flags);
232         set_bit(ST_FLITE_OFF, &fimc->state);
233         flite_hw_capture_stop(fimc);
234         spin_unlock_irqrestore(&fimc->slock, flags);
235 
236         wait_event_timeout(fimc->irq_queue,
237                            !test_bit(ST_FLITE_OFF, &fimc->state),
238                            (2*HZ/10)); /* 200 ms */
239 
240         return fimc_lite_reinit(fimc, suspend);
241 }
242 
243 /* Must be called  with fimc.slock spinlock held. */
244 static void fimc_lite_config_update(struct fimc_lite *fimc)
245 {
246         flite_hw_set_window_offset(fimc, &fimc->inp_frame);
247         flite_hw_set_dma_window(fimc, &fimc->out_frame);
248         flite_hw_set_test_pattern(fimc, fimc->test_pattern->val);
249         clear_bit(ST_FLITE_CONFIG, &fimc->state);
250 }
251 
252 static irqreturn_t flite_irq_handler(int irq, void *priv)
253 {
254         struct fimc_lite *fimc = priv;
255         struct flite_buffer *vbuf;
256         unsigned long flags;
257         struct timeval *tv;
258         struct timespec ts;
259         u32 intsrc;
260 
261         spin_lock_irqsave(&fimc->slock, flags);
262 
263         intsrc = flite_hw_get_interrupt_source(fimc);
264         flite_hw_clear_pending_irq(fimc);
265 
266         if (test_and_clear_bit(ST_FLITE_OFF, &fimc->state)) {
267                 wake_up(&fimc->irq_queue);
268                 goto done;
269         }
270 
271         if (intsrc & FLITE_REG_CISTATUS_IRQ_SRC_OVERFLOW) {
272                 clear_bit(ST_FLITE_RUN, &fimc->state);
273                 fimc->events.data_overflow++;
274         }
275 
276         if (intsrc & FLITE_REG_CISTATUS_IRQ_SRC_LASTCAPEND) {
277                 flite_hw_clear_last_capture_end(fimc);
278                 clear_bit(ST_FLITE_STREAM, &fimc->state);
279                 wake_up(&fimc->irq_queue);
280         }
281 
282         if (atomic_read(&fimc->out_path) != FIMC_IO_DMA)
283                 goto done;
284 
285         if ((intsrc & FLITE_REG_CISTATUS_IRQ_SRC_FRMSTART) &&
286             test_bit(ST_FLITE_RUN, &fimc->state) &&
287             !list_empty(&fimc->pending_buf_q)) {
288                 vbuf = fimc_lite_pending_queue_pop(fimc);
289                 flite_hw_set_dma_buffer(fimc, vbuf);
290                 fimc_lite_active_queue_add(fimc, vbuf);
291         }
292 
293         if ((intsrc & FLITE_REG_CISTATUS_IRQ_SRC_FRMEND) &&
294             test_bit(ST_FLITE_RUN, &fimc->state) &&
295             !list_empty(&fimc->active_buf_q)) {
296                 vbuf = fimc_lite_active_queue_pop(fimc);
297                 ktime_get_ts(&ts);
298                 tv = &vbuf->vb.v4l2_buf.timestamp;
299                 tv->tv_sec = ts.tv_sec;
300                 tv->tv_usec = ts.tv_nsec / NSEC_PER_USEC;
301                 vbuf->vb.v4l2_buf.sequence = fimc->frame_count++;
302                 flite_hw_mask_dma_buffer(fimc, vbuf->index);
303                 vb2_buffer_done(&vbuf->vb, VB2_BUF_STATE_DONE);
304         }
305 
306         if (test_bit(ST_FLITE_CONFIG, &fimc->state))
307                 fimc_lite_config_update(fimc);
308 
309         if (list_empty(&fimc->pending_buf_q)) {
310                 flite_hw_capture_stop(fimc);
311                 clear_bit(ST_FLITE_STREAM, &fimc->state);
312         }
313 done:
314         set_bit(ST_FLITE_RUN, &fimc->state);
315         spin_unlock_irqrestore(&fimc->slock, flags);
316         return IRQ_HANDLED;
317 }
318 
319 static int start_streaming(struct vb2_queue *q, unsigned int count)
320 {
321         struct fimc_lite *fimc = q->drv_priv;
322         unsigned long flags;
323         int ret;
324 
325         spin_lock_irqsave(&fimc->slock, flags);
326 
327         fimc->buf_index = 0;
328         fimc->frame_count = 0;
329 
330         spin_unlock_irqrestore(&fimc->slock, flags);
331 
332         ret = fimc_lite_hw_init(fimc, false);
333         if (ret) {
334                 fimc_lite_reinit(fimc, false);
335                 return ret;
336         }
337 
338         set_bit(ST_FLITE_PENDING, &fimc->state);
339 
340         if (!list_empty(&fimc->active_buf_q) &&
341             !test_and_set_bit(ST_FLITE_STREAM, &fimc->state)) {
342                 flite_hw_capture_start(fimc);
343 
344                 if (!test_and_set_bit(ST_SENSOR_STREAM, &fimc->state))
345                         fimc_pipeline_call(&fimc->ve, set_stream, 1);
346         }
347         if (debug > 0)
348                 flite_hw_dump_regs(fimc, __func__);
349 
350         return 0;
351 }
352 
353 static void stop_streaming(struct vb2_queue *q)
354 {
355         struct fimc_lite *fimc = q->drv_priv;
356 
357         if (!fimc_lite_active(fimc))
358                 return;
359 
360         fimc_lite_stop_capture(fimc, false);
361 }
362 
363 static int queue_setup(struct vb2_queue *vq, const struct v4l2_format *pfmt,
364                        unsigned int *num_buffers, unsigned int *num_planes,
365                        unsigned int sizes[], void *allocators[])
366 {
367         const struct v4l2_pix_format_mplane *pixm = NULL;
368         struct fimc_lite *fimc = vq->drv_priv;
369         struct flite_frame *frame = &fimc->out_frame;
370         const struct fimc_fmt *fmt = frame->fmt;
371         unsigned long wh;
372         int i;
373 
374         if (pfmt) {
375                 pixm = &pfmt->fmt.pix_mp;
376                 fmt = fimc_lite_find_format(&pixm->pixelformat, NULL, 0, -1);
377                 wh = pixm->width * pixm->height;
378         } else {
379                 wh = frame->f_width * frame->f_height;
380         }
381 
382         if (fmt == NULL)
383                 return -EINVAL;
384 
385         *num_planes = fmt->memplanes;
386 
387         for (i = 0; i < fmt->memplanes; i++) {
388                 unsigned int size = (wh * fmt->depth[i]) / 8;
389                 if (pixm)
390                         sizes[i] = max(size, pixm->plane_fmt[i].sizeimage);
391                 else
392                         sizes[i] = size;
393                 allocators[i] = fimc->alloc_ctx;
394         }
395 
396         return 0;
397 }
398 
399 static int buffer_prepare(struct vb2_buffer *vb)
400 {
401         struct vb2_queue *vq = vb->vb2_queue;
402         struct fimc_lite *fimc = vq->drv_priv;
403         int i;
404 
405         if (fimc->out_frame.fmt == NULL)
406                 return -EINVAL;
407 
408         for (i = 0; i < fimc->out_frame.fmt->memplanes; i++) {
409                 unsigned long size = fimc->payload[i];
410 
411                 if (vb2_plane_size(vb, i) < size) {
412                         v4l2_err(&fimc->ve.vdev,
413                                  "User buffer too small (%ld < %ld)\n",
414                                  vb2_plane_size(vb, i), size);
415                         return -EINVAL;
416                 }
417                 vb2_set_plane_payload(vb, i, size);
418         }
419 
420         return 0;
421 }
422 
423 static void buffer_queue(struct vb2_buffer *vb)
424 {
425         struct flite_buffer *buf
426                 = container_of(vb, struct flite_buffer, vb);
427         struct fimc_lite *fimc = vb2_get_drv_priv(vb->vb2_queue);
428         unsigned long flags;
429 
430         spin_lock_irqsave(&fimc->slock, flags);
431         buf->paddr = vb2_dma_contig_plane_dma_addr(vb, 0);
432 
433         buf->index = fimc->buf_index++;
434         if (fimc->buf_index >= fimc->reqbufs_count)
435                 fimc->buf_index = 0;
436 
437         if (!test_bit(ST_FLITE_SUSPENDED, &fimc->state) &&
438             !test_bit(ST_FLITE_STREAM, &fimc->state) &&
439             list_empty(&fimc->active_buf_q)) {
440                 flite_hw_set_dma_buffer(fimc, buf);
441                 fimc_lite_active_queue_add(fimc, buf);
442         } else {
443                 fimc_lite_pending_queue_add(fimc, buf);
444         }
445 
446         if (vb2_is_streaming(&fimc->vb_queue) &&
447             !list_empty(&fimc->pending_buf_q) &&
448             !test_and_set_bit(ST_FLITE_STREAM, &fimc->state)) {
449                 flite_hw_capture_start(fimc);
450                 spin_unlock_irqrestore(&fimc->slock, flags);
451 
452                 if (!test_and_set_bit(ST_SENSOR_STREAM, &fimc->state))
453                         fimc_pipeline_call(&fimc->ve, set_stream, 1);
454                 return;
455         }
456         spin_unlock_irqrestore(&fimc->slock, flags);
457 }
458 
459 static const struct vb2_ops fimc_lite_qops = {
460         .queue_setup     = queue_setup,
461         .buf_prepare     = buffer_prepare,
462         .buf_queue       = buffer_queue,
463         .wait_prepare    = vb2_ops_wait_prepare,
464         .wait_finish     = vb2_ops_wait_finish,
465         .start_streaming = start_streaming,
466         .stop_streaming  = stop_streaming,
467 };
468 
469 static void fimc_lite_clear_event_counters(struct fimc_lite *fimc)
470 {
471         unsigned long flags;
472 
473         spin_lock_irqsave(&fimc->slock, flags);
474         memset(&fimc->events, 0, sizeof(fimc->events));
475         spin_unlock_irqrestore(&fimc->slock, flags);
476 }
477 
478 static int fimc_lite_open(struct file *file)
479 {
480         struct fimc_lite *fimc = video_drvdata(file);
481         struct media_entity *me = &fimc->ve.vdev.entity;
482         int ret;
483 
484         mutex_lock(&fimc->lock);
485         if (atomic_read(&fimc->out_path) != FIMC_IO_DMA) {
486                 ret = -EBUSY;
487                 goto unlock;
488         }
489 
490         set_bit(ST_FLITE_IN_USE, &fimc->state);
491         ret = pm_runtime_get_sync(&fimc->pdev->dev);
492         if (ret < 0)
493                 goto unlock;
494 
495         ret = v4l2_fh_open(file);
496         if (ret < 0)
497                 goto err_pm;
498 
499         if (!v4l2_fh_is_singular_file(file) ||
500             atomic_read(&fimc->out_path) != FIMC_IO_DMA)
501                 goto unlock;
502 
503         mutex_lock(&me->parent->graph_mutex);
504 
505         ret = fimc_pipeline_call(&fimc->ve, open, me, true);
506 
507         /* Mark video pipeline ending at this video node as in use. */
508         if (ret == 0)
509                 me->use_count++;
510 
511         mutex_unlock(&me->parent->graph_mutex);
512 
513         if (!ret) {
514                 fimc_lite_clear_event_counters(fimc);
515                 goto unlock;
516         }
517 
518         v4l2_fh_release(file);
519 err_pm:
520         pm_runtime_put_sync(&fimc->pdev->dev);
521         clear_bit(ST_FLITE_IN_USE, &fimc->state);
522 unlock:
523         mutex_unlock(&fimc->lock);
524         return ret;
525 }
526 
527 static int fimc_lite_release(struct file *file)
528 {
529         struct fimc_lite *fimc = video_drvdata(file);
530         struct media_entity *entity = &fimc->ve.vdev.entity;
531 
532         mutex_lock(&fimc->lock);
533 
534         if (v4l2_fh_is_singular_file(file) &&
535             atomic_read(&fimc->out_path) == FIMC_IO_DMA) {
536                 if (fimc->streaming) {
537                         media_entity_pipeline_stop(entity);
538                         fimc->streaming = false;
539                 }
540                 fimc_lite_stop_capture(fimc, false);
541                 fimc_pipeline_call(&fimc->ve, close);
542                 clear_bit(ST_FLITE_IN_USE, &fimc->state);
543 
544                 mutex_lock(&entity->parent->graph_mutex);
545                 entity->use_count--;
546                 mutex_unlock(&entity->parent->graph_mutex);
547         }
548 
549         _vb2_fop_release(file, NULL);
550         pm_runtime_put(&fimc->pdev->dev);
551         clear_bit(ST_FLITE_SUSPENDED, &fimc->state);
552 
553         mutex_unlock(&fimc->lock);
554         return 0;
555 }
556 
557 static const struct v4l2_file_operations fimc_lite_fops = {
558         .owner          = THIS_MODULE,
559         .open           = fimc_lite_open,
560         .release        = fimc_lite_release,
561         .poll           = vb2_fop_poll,
562         .unlocked_ioctl = video_ioctl2,
563         .mmap           = vb2_fop_mmap,
564 };
565 
566 /*
567  * Format and crop negotiation helpers
568  */
569 
570 static const struct fimc_fmt *fimc_lite_subdev_try_fmt(struct fimc_lite *fimc,
571                                         struct v4l2_subdev_fh *fh,
572                                         struct v4l2_subdev_format *format)
573 {
574         struct flite_drvdata *dd = fimc->dd;
575         struct v4l2_mbus_framefmt *mf = &format->format;
576         const struct fimc_fmt *fmt = NULL;
577 
578         if (format->pad == FLITE_SD_PAD_SINK) {
579                 v4l_bound_align_image(&mf->width, 8, dd->max_width,
580                                 ffs(dd->out_width_align) - 1,
581                                 &mf->height, 0, dd->max_height, 0, 0);
582 
583                 fmt = fimc_lite_find_format(NULL, &mf->code, 0, 0);
584                 if (WARN_ON(!fmt))
585                         return NULL;
586 
587                 mf->colorspace = fmt->colorspace;
588                 mf->code = fmt->mbus_code;
589         } else {
590                 struct flite_frame *sink = &fimc->inp_frame;
591                 struct v4l2_mbus_framefmt *sink_fmt;
592                 struct v4l2_rect *rect;
593 
594                 if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
595                         sink_fmt = v4l2_subdev_get_try_format(fh,
596                                                 FLITE_SD_PAD_SINK);
597 
598                         mf->code = sink_fmt->code;
599                         mf->colorspace = sink_fmt->colorspace;
600 
601                         rect = v4l2_subdev_get_try_crop(fh,
602                                                 FLITE_SD_PAD_SINK);
603                 } else {
604                         mf->code = sink->fmt->mbus_code;
605                         mf->colorspace = sink->fmt->colorspace;
606                         rect = &sink->rect;
607                 }
608 
609                 /* Allow changing format only on sink pad */
610                 mf->width = rect->width;
611                 mf->height = rect->height;
612         }
613 
614         mf->field = V4L2_FIELD_NONE;
615 
616         v4l2_dbg(1, debug, &fimc->subdev, "code: %#x (%d), %dx%d\n",
617                  mf->code, mf->colorspace, mf->width, mf->height);
618 
619         return fmt;
620 }
621 
622 static void fimc_lite_try_crop(struct fimc_lite *fimc, struct v4l2_rect *r)
623 {
624         struct flite_frame *frame = &fimc->inp_frame;
625 
626         v4l_bound_align_image(&r->width, 0, frame->f_width, 0,
627                               &r->height, 0, frame->f_height, 0, 0);
628 
629         /* Adjust left/top if cropping rectangle got out of bounds */
630         r->left = clamp_t(u32, r->left, 0, frame->f_width - r->width);
631         r->left = round_down(r->left, fimc->dd->win_hor_offs_align);
632         r->top  = clamp_t(u32, r->top, 0, frame->f_height - r->height);
633 
634         v4l2_dbg(1, debug, &fimc->subdev, "(%d,%d)/%dx%d, sink fmt: %dx%d\n",
635                  r->left, r->top, r->width, r->height,
636                  frame->f_width, frame->f_height);
637 }
638 
639 static void fimc_lite_try_compose(struct fimc_lite *fimc, struct v4l2_rect *r)
640 {
641         struct flite_frame *frame = &fimc->out_frame;
642         struct v4l2_rect *crop_rect = &fimc->inp_frame.rect;
643 
644         /* Scaling is not supported so we enforce compose rectangle size
645            same as size of the sink crop rectangle. */
646         r->width = crop_rect->width;
647         r->height = crop_rect->height;
648 
649         /* Adjust left/top if the composing rectangle got out of bounds */
650         r->left = clamp_t(u32, r->left, 0, frame->f_width - r->width);
651         r->left = round_down(r->left, fimc->dd->out_hor_offs_align);
652         r->top  = clamp_t(u32, r->top, 0, fimc->out_frame.f_height - r->height);
653 
654         v4l2_dbg(1, debug, &fimc->subdev, "(%d,%d)/%dx%d, source fmt: %dx%d\n",
655                  r->left, r->top, r->width, r->height,
656                  frame->f_width, frame->f_height);
657 }
658 
659 /*
660  * Video node ioctl operations
661  */
662 static int fimc_lite_querycap(struct file *file, void *priv,
663                                         struct v4l2_capability *cap)
664 {
665         struct fimc_lite *fimc = video_drvdata(file);
666 
667         strlcpy(cap->driver, FIMC_LITE_DRV_NAME, sizeof(cap->driver));
668         strlcpy(cap->card, FIMC_LITE_DRV_NAME, sizeof(cap->card));
669         snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
670                                         dev_name(&fimc->pdev->dev));
671 
672         cap->device_caps = V4L2_CAP_STREAMING;
673         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
674         return 0;
675 }
676 
677 static int fimc_lite_enum_fmt_mplane(struct file *file, void *priv,
678                                      struct v4l2_fmtdesc *f)
679 {
680         const struct fimc_fmt *fmt;
681 
682         if (f->index >= ARRAY_SIZE(fimc_lite_formats))
683                 return -EINVAL;
684 
685         fmt = &fimc_lite_formats[f->index];
686         strlcpy(f->description, fmt->name, sizeof(f->description));
687         f->pixelformat = fmt->fourcc;
688 
689         return 0;
690 }
691 
692 static int fimc_lite_g_fmt_mplane(struct file *file, void *fh,
693                                   struct v4l2_format *f)
694 {
695         struct fimc_lite *fimc = video_drvdata(file);
696         struct v4l2_pix_format_mplane *pixm = &f->fmt.pix_mp;
697         struct v4l2_plane_pix_format *plane_fmt = &pixm->plane_fmt[0];
698         struct flite_frame *frame = &fimc->out_frame;
699         const struct fimc_fmt *fmt = frame->fmt;
700 
701         plane_fmt->bytesperline = (frame->f_width * fmt->depth[0]) / 8;
702         plane_fmt->sizeimage = plane_fmt->bytesperline * frame->f_height;
703 
704         pixm->num_planes = fmt->memplanes;
705         pixm->pixelformat = fmt->fourcc;
706         pixm->width = frame->f_width;
707         pixm->height = frame->f_height;
708         pixm->field = V4L2_FIELD_NONE;
709         pixm->colorspace = fmt->colorspace;
710         return 0;
711 }
712 
713 static int fimc_lite_try_fmt(struct fimc_lite *fimc,
714                              struct v4l2_pix_format_mplane *pixm,
715                              const struct fimc_fmt **ffmt)
716 {
717         u32 bpl = pixm->plane_fmt[0].bytesperline;
718         struct flite_drvdata *dd = fimc->dd;
719         const struct fimc_fmt *inp_fmt = fimc->inp_frame.fmt;
720         const struct fimc_fmt *fmt;
721 
722         if (WARN_ON(inp_fmt == NULL))
723                 return -EINVAL;
724         /*
725          * We allow some flexibility only for YUV formats. In case of raw
726          * raw Bayer the FIMC-LITE's output format must match its camera
727          * interface input format.
728          */
729         if (inp_fmt->flags & FMT_FLAGS_YUV)
730                 fmt = fimc_lite_find_format(&pixm->pixelformat, NULL,
731                                                 inp_fmt->flags, 0);
732         else
733                 fmt = inp_fmt;
734 
735         if (WARN_ON(fmt == NULL))
736                 return -EINVAL;
737         if (ffmt)
738                 *ffmt = fmt;
739         v4l_bound_align_image(&pixm->width, 8, dd->max_width,
740                               ffs(dd->out_width_align) - 1,
741                               &pixm->height, 0, dd->max_height, 0, 0);
742 
743         if ((bpl == 0 || ((bpl * 8) / fmt->depth[0]) < pixm->width))
744                 pixm->plane_fmt[0].bytesperline = (pixm->width *
745                                                    fmt->depth[0]) / 8;
746 
747         if (pixm->plane_fmt[0].sizeimage == 0)
748                 pixm->plane_fmt[0].sizeimage = (pixm->width * pixm->height *
749                                                 fmt->depth[0]) / 8;
750         pixm->num_planes = fmt->memplanes;
751         pixm->pixelformat = fmt->fourcc;
752         pixm->colorspace = fmt->colorspace;
753         pixm->field = V4L2_FIELD_NONE;
754         return 0;
755 }
756 
757 static int fimc_lite_try_fmt_mplane(struct file *file, void *fh,
758                                     struct v4l2_format *f)
759 {
760         struct fimc_lite *fimc = video_drvdata(file);
761         return fimc_lite_try_fmt(fimc, &f->fmt.pix_mp, NULL);
762 }
763 
764 static int fimc_lite_s_fmt_mplane(struct file *file, void *priv,
765                                   struct v4l2_format *f)
766 {
767         struct v4l2_pix_format_mplane *pixm = &f->fmt.pix_mp;
768         struct fimc_lite *fimc = video_drvdata(file);
769         struct flite_frame *frame = &fimc->out_frame;
770         const struct fimc_fmt *fmt = NULL;
771         int ret;
772 
773         if (vb2_is_busy(&fimc->vb_queue))
774                 return -EBUSY;
775 
776         ret = fimc_lite_try_fmt(fimc, &f->fmt.pix_mp, &fmt);
777         if (ret < 0)
778                 return ret;
779 
780         frame->fmt = fmt;
781         fimc->payload[0] = max((pixm->width * pixm->height * fmt->depth[0]) / 8,
782                                pixm->plane_fmt[0].sizeimage);
783         frame->f_width = pixm->width;
784         frame->f_height = pixm->height;
785 
786         return 0;
787 }
788 
789 static int fimc_pipeline_validate(struct fimc_lite *fimc)
790 {
791         struct v4l2_subdev *sd = &fimc->subdev;
792         struct v4l2_subdev_format sink_fmt, src_fmt;
793         struct media_pad *pad;
794         int ret;
795 
796         while (1) {
797                 /* Retrieve format at the sink pad */
798                 pad = &sd->entity.pads[0];
799                 if (!(pad->flags & MEDIA_PAD_FL_SINK))
800                         break;
801                 /* Don't call FIMC subdev operation to avoid nested locking */
802                 if (sd == &fimc->subdev) {
803                         struct flite_frame *ff = &fimc->out_frame;
804                         sink_fmt.format.width = ff->f_width;
805                         sink_fmt.format.height = ff->f_height;
806                         sink_fmt.format.code = fimc->inp_frame.fmt->mbus_code;
807                 } else {
808                         sink_fmt.pad = pad->index;
809                         sink_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
810                         ret = v4l2_subdev_call(sd, pad, get_fmt, NULL,
811                                                &sink_fmt);
812                         if (ret < 0 && ret != -ENOIOCTLCMD)
813                                 return -EPIPE;
814                 }
815                 /* Retrieve format at the source pad */
816                 pad = media_entity_remote_pad(pad);
817                 if (pad == NULL ||
818                     media_entity_type(pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
819                         break;
820 
821                 sd = media_entity_to_v4l2_subdev(pad->entity);
822                 src_fmt.pad = pad->index;
823                 src_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
824                 ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &src_fmt);
825                 if (ret < 0 && ret != -ENOIOCTLCMD)
826                         return -EPIPE;
827 
828                 if (src_fmt.format.width != sink_fmt.format.width ||
829                     src_fmt.format.height != sink_fmt.format.height ||
830                     src_fmt.format.code != sink_fmt.format.code)
831                         return -EPIPE;
832         }
833         return 0;
834 }
835 
836 static int fimc_lite_streamon(struct file *file, void *priv,
837                               enum v4l2_buf_type type)
838 {
839         struct fimc_lite *fimc = video_drvdata(file);
840         struct media_entity *entity = &fimc->ve.vdev.entity;
841         int ret;
842 
843         if (fimc_lite_active(fimc))
844                 return -EBUSY;
845 
846         ret = media_entity_pipeline_start(entity, &fimc->ve.pipe->mp);
847         if (ret < 0)
848                 return ret;
849 
850         ret = fimc_pipeline_validate(fimc);
851         if (ret < 0)
852                 goto err_p_stop;
853 
854         fimc->sensor = fimc_find_remote_sensor(&fimc->subdev.entity);
855 
856         ret = vb2_ioctl_streamon(file, priv, type);
857         if (!ret) {
858                 fimc->streaming = true;
859                 return ret;
860         }
861 
862 err_p_stop:
863         media_entity_pipeline_stop(entity);
864         return 0;
865 }
866 
867 static int fimc_lite_streamoff(struct file *file, void *priv,
868                                enum v4l2_buf_type type)
869 {
870         struct fimc_lite *fimc = video_drvdata(file);
871         int ret;
872 
873         ret = vb2_ioctl_streamoff(file, priv, type);
874         if (ret < 0)
875                 return ret;
876 
877         media_entity_pipeline_stop(&fimc->ve.vdev.entity);
878         fimc->streaming = false;
879         return 0;
880 }
881 
882 static int fimc_lite_reqbufs(struct file *file, void *priv,
883                              struct v4l2_requestbuffers *reqbufs)
884 {
885         struct fimc_lite *fimc = video_drvdata(file);
886         int ret;
887 
888         reqbufs->count = max_t(u32, FLITE_REQ_BUFS_MIN, reqbufs->count);
889         ret = vb2_ioctl_reqbufs(file, priv, reqbufs);
890         if (!ret)
891                 fimc->reqbufs_count = reqbufs->count;
892 
893         return ret;
894 }
895 
896 /* Return 1 if rectangle a is enclosed in rectangle b, or 0 otherwise. */
897 static int enclosed_rectangle(struct v4l2_rect *a, struct v4l2_rect *b)
898 {
899         if (a->left < b->left || a->top < b->top)
900                 return 0;
901         if (a->left + a->width > b->left + b->width)
902                 return 0;
903         if (a->top + a->height > b->top + b->height)
904                 return 0;
905 
906         return 1;
907 }
908 
909 static int fimc_lite_g_selection(struct file *file, void *fh,
910                                  struct v4l2_selection *sel)
911 {
912         struct fimc_lite *fimc = video_drvdata(file);
913         struct flite_frame *f = &fimc->out_frame;
914 
915         if (sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
916                 return -EINVAL;
917 
918         switch (sel->target) {
919         case V4L2_SEL_TGT_COMPOSE_BOUNDS:
920         case V4L2_SEL_TGT_COMPOSE_DEFAULT:
921                 sel->r.left = 0;
922                 sel->r.top = 0;
923                 sel->r.width = f->f_width;
924                 sel->r.height = f->f_height;
925                 return 0;
926 
927         case V4L2_SEL_TGT_COMPOSE:
928                 sel->r = f->rect;
929                 return 0;
930         }
931 
932         return -EINVAL;
933 }
934 
935 static int fimc_lite_s_selection(struct file *file, void *fh,
936                                  struct v4l2_selection *sel)
937 {
938         struct fimc_lite *fimc = video_drvdata(file);
939         struct flite_frame *f = &fimc->out_frame;
940         struct v4l2_rect rect = sel->r;
941         unsigned long flags;
942 
943         if (sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE ||
944             sel->target != V4L2_SEL_TGT_COMPOSE)
945                 return -EINVAL;
946 
947         fimc_lite_try_compose(fimc, &rect);
948 
949         if ((sel->flags & V4L2_SEL_FLAG_LE) &&
950             !enclosed_rectangle(&rect, &sel->r))
951                 return -ERANGE;
952 
953         if ((sel->flags & V4L2_SEL_FLAG_GE) &&
954             !enclosed_rectangle(&sel->r, &rect))
955                 return -ERANGE;
956 
957         sel->r = rect;
958         spin_lock_irqsave(&fimc->slock, flags);
959         f->rect = rect;
960         set_bit(ST_FLITE_CONFIG, &fimc->state);
961         spin_unlock_irqrestore(&fimc->slock, flags);
962 
963         return 0;
964 }
965 
966 static const struct v4l2_ioctl_ops fimc_lite_ioctl_ops = {
967         .vidioc_querycap                = fimc_lite_querycap,
968         .vidioc_enum_fmt_vid_cap_mplane = fimc_lite_enum_fmt_mplane,
969         .vidioc_try_fmt_vid_cap_mplane  = fimc_lite_try_fmt_mplane,
970         .vidioc_s_fmt_vid_cap_mplane    = fimc_lite_s_fmt_mplane,
971         .vidioc_g_fmt_vid_cap_mplane    = fimc_lite_g_fmt_mplane,
972         .vidioc_g_selection             = fimc_lite_g_selection,
973         .vidioc_s_selection             = fimc_lite_s_selection,
974         .vidioc_reqbufs                 = fimc_lite_reqbufs,
975         .vidioc_querybuf                = vb2_ioctl_querybuf,
976         .vidioc_prepare_buf             = vb2_ioctl_prepare_buf,
977         .vidioc_create_bufs             = vb2_ioctl_create_bufs,
978         .vidioc_qbuf                    = vb2_ioctl_qbuf,
979         .vidioc_dqbuf                   = vb2_ioctl_dqbuf,
980         .vidioc_streamon                = fimc_lite_streamon,
981         .vidioc_streamoff               = fimc_lite_streamoff,
982 };
983 
984 /* Capture subdev media entity operations */
985 static int fimc_lite_link_setup(struct media_entity *entity,
986                                 const struct media_pad *local,
987                                 const struct media_pad *remote, u32 flags)
988 {
989         struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity);
990         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
991         unsigned int remote_ent_type = media_entity_type(remote->entity);
992         int ret = 0;
993 
994         if (WARN_ON(fimc == NULL))
995                 return 0;
996 
997         v4l2_dbg(1, debug, sd, "%s: %s --> %s, flags: 0x%x. source_id: 0x%x\n",
998                  __func__, remote->entity->name, local->entity->name,
999                  flags, fimc->source_subdev_grp_id);
1000 
1001         switch (local->index) {
1002         case FLITE_SD_PAD_SINK:
1003                 if (remote_ent_type != MEDIA_ENT_T_V4L2_SUBDEV) {
1004                         ret = -EINVAL;
1005                         break;
1006                 }
1007                 if (flags & MEDIA_LNK_FL_ENABLED) {
1008                         if (fimc->source_subdev_grp_id == 0)
1009                                 fimc->source_subdev_grp_id = sd->grp_id;
1010                         else
1011                                 ret = -EBUSY;
1012                 } else {
1013                         fimc->source_subdev_grp_id = 0;
1014                         fimc->sensor = NULL;
1015                 }
1016                 break;
1017 
1018         case FLITE_SD_PAD_SOURCE_DMA:
1019                 if (!(flags & MEDIA_LNK_FL_ENABLED))
1020                         atomic_set(&fimc->out_path, FIMC_IO_NONE);
1021                 else if (remote_ent_type == MEDIA_ENT_T_DEVNODE)
1022                         atomic_set(&fimc->out_path, FIMC_IO_DMA);
1023                 else
1024                         ret = -EINVAL;
1025                 break;
1026 
1027         case FLITE_SD_PAD_SOURCE_ISP:
1028                 if (!(flags & MEDIA_LNK_FL_ENABLED))
1029                         atomic_set(&fimc->out_path, FIMC_IO_NONE);
1030                 else if (remote_ent_type == MEDIA_ENT_T_V4L2_SUBDEV)
1031                         atomic_set(&fimc->out_path, FIMC_IO_ISP);
1032                 else
1033                         ret = -EINVAL;
1034                 break;
1035 
1036         default:
1037                 v4l2_err(sd, "Invalid pad index\n");
1038                 ret = -EINVAL;
1039         }
1040         mb();
1041 
1042         return ret;
1043 }
1044 
1045 static const struct media_entity_operations fimc_lite_subdev_media_ops = {
1046         .link_setup = fimc_lite_link_setup,
1047 };
1048 
1049 static int fimc_lite_subdev_enum_mbus_code(struct v4l2_subdev *sd,
1050                                            struct v4l2_subdev_fh *fh,
1051                                            struct v4l2_subdev_mbus_code_enum *code)
1052 {
1053         const struct fimc_fmt *fmt;
1054 
1055         fmt = fimc_lite_find_format(NULL, NULL, 0, code->index);
1056         if (!fmt)
1057                 return -EINVAL;
1058         code->code = fmt->mbus_code;
1059         return 0;
1060 }
1061 
1062 static struct v4l2_mbus_framefmt *__fimc_lite_subdev_get_try_fmt(
1063                         struct v4l2_subdev_fh *fh, unsigned int pad)
1064 {
1065         if (pad != FLITE_SD_PAD_SINK)
1066                 pad = FLITE_SD_PAD_SOURCE_DMA;
1067 
1068         return v4l2_subdev_get_try_format(fh, pad);
1069 }
1070 
1071 static int fimc_lite_subdev_get_fmt(struct v4l2_subdev *sd,
1072                                     struct v4l2_subdev_fh *fh,
1073                                     struct v4l2_subdev_format *fmt)
1074 {
1075         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1076         struct v4l2_mbus_framefmt *mf = &fmt->format;
1077         struct flite_frame *f = &fimc->inp_frame;
1078 
1079         if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
1080                 mf = __fimc_lite_subdev_get_try_fmt(fh, fmt->pad);
1081                 fmt->format = *mf;
1082                 return 0;
1083         }
1084 
1085         mutex_lock(&fimc->lock);
1086         mf->colorspace = f->fmt->colorspace;
1087         mf->code = f->fmt->mbus_code;
1088 
1089         if (fmt->pad == FLITE_SD_PAD_SINK) {
1090                 /* full camera input frame size */
1091                 mf->width = f->f_width;
1092                 mf->height = f->f_height;
1093         } else {
1094                 /* crop size */
1095                 mf->width = f->rect.width;
1096                 mf->height = f->rect.height;
1097         }
1098         mutex_unlock(&fimc->lock);
1099         return 0;
1100 }
1101 
1102 static int fimc_lite_subdev_set_fmt(struct v4l2_subdev *sd,
1103                                     struct v4l2_subdev_fh *fh,
1104                                     struct v4l2_subdev_format *fmt)
1105 {
1106         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1107         struct v4l2_mbus_framefmt *mf = &fmt->format;
1108         struct flite_frame *sink = &fimc->inp_frame;
1109         struct flite_frame *source = &fimc->out_frame;
1110         const struct fimc_fmt *ffmt;
1111 
1112         v4l2_dbg(1, debug, sd, "pad%d: code: 0x%x, %dx%d\n",
1113                  fmt->pad, mf->code, mf->width, mf->height);
1114 
1115         mutex_lock(&fimc->lock);
1116 
1117         if ((atomic_read(&fimc->out_path) == FIMC_IO_ISP &&
1118             sd->entity.stream_count > 0) ||
1119             (atomic_read(&fimc->out_path) == FIMC_IO_DMA &&
1120             vb2_is_busy(&fimc->vb_queue))) {
1121                 mutex_unlock(&fimc->lock);
1122                 return -EBUSY;
1123         }
1124 
1125         ffmt = fimc_lite_subdev_try_fmt(fimc, fh, fmt);
1126 
1127         if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
1128                 struct v4l2_mbus_framefmt *src_fmt;
1129 
1130                 mf = __fimc_lite_subdev_get_try_fmt(fh, fmt->pad);
1131                 *mf = fmt->format;
1132 
1133                 if (fmt->pad == FLITE_SD_PAD_SINK) {
1134                         unsigned int pad = FLITE_SD_PAD_SOURCE_DMA;
1135                         src_fmt = __fimc_lite_subdev_get_try_fmt(fh, pad);
1136                         *src_fmt = *mf;
1137                 }
1138 
1139                 mutex_unlock(&fimc->lock);
1140                 return 0;
1141         }
1142 
1143         if (fmt->pad == FLITE_SD_PAD_SINK) {
1144                 sink->f_width = mf->width;
1145                 sink->f_height = mf->height;
1146                 sink->fmt = ffmt;
1147                 /* Set sink crop rectangle */
1148                 sink->rect.width = mf->width;
1149                 sink->rect.height = mf->height;
1150                 sink->rect.left = 0;
1151                 sink->rect.top = 0;
1152                 /* Reset source format and crop rectangle */
1153                 source->rect = sink->rect;
1154                 source->f_width = mf->width;
1155                 source->f_height = mf->height;
1156         }
1157 
1158         mutex_unlock(&fimc->lock);
1159         return 0;
1160 }
1161 
1162 static int fimc_lite_subdev_get_selection(struct v4l2_subdev *sd,
1163                                           struct v4l2_subdev_fh *fh,
1164                                           struct v4l2_subdev_selection *sel)
1165 {
1166         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1167         struct flite_frame *f = &fimc->inp_frame;
1168 
1169         if ((sel->target != V4L2_SEL_TGT_CROP &&
1170              sel->target != V4L2_SEL_TGT_CROP_BOUNDS) ||
1171              sel->pad != FLITE_SD_PAD_SINK)
1172                 return -EINVAL;
1173 
1174         if (sel->which == V4L2_SUBDEV_FORMAT_TRY) {
1175                 sel->r = *v4l2_subdev_get_try_crop(fh, sel->pad);
1176                 return 0;
1177         }
1178 
1179         mutex_lock(&fimc->lock);
1180         if (sel->target == V4L2_SEL_TGT_CROP) {
1181                 sel->r = f->rect;
1182         } else {
1183                 sel->r.left = 0;
1184                 sel->r.top = 0;
1185                 sel->r.width = f->f_width;
1186                 sel->r.height = f->f_height;
1187         }
1188         mutex_unlock(&fimc->lock);
1189 
1190         v4l2_dbg(1, debug, sd, "%s: (%d,%d) %dx%d, f_w: %d, f_h: %d\n",
1191                  __func__, f->rect.left, f->rect.top, f->rect.width,
1192                  f->rect.height, f->f_width, f->f_height);
1193 
1194         return 0;
1195 }
1196 
1197 static int fimc_lite_subdev_set_selection(struct v4l2_subdev *sd,
1198                                           struct v4l2_subdev_fh *fh,
1199                                           struct v4l2_subdev_selection *sel)
1200 {
1201         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1202         struct flite_frame *f = &fimc->inp_frame;
1203         int ret = 0;
1204 
1205         if (sel->target != V4L2_SEL_TGT_CROP || sel->pad != FLITE_SD_PAD_SINK)
1206                 return -EINVAL;
1207 
1208         mutex_lock(&fimc->lock);
1209         fimc_lite_try_crop(fimc, &sel->r);
1210 
1211         if (sel->which == V4L2_SUBDEV_FORMAT_TRY) {
1212                 *v4l2_subdev_get_try_crop(fh, sel->pad) = sel->r;
1213         } else {
1214                 unsigned long flags;
1215                 spin_lock_irqsave(&fimc->slock, flags);
1216                 f->rect = sel->r;
1217                 /* Same crop rectangle on the source pad */
1218                 fimc->out_frame.rect = sel->r;
1219                 set_bit(ST_FLITE_CONFIG, &fimc->state);
1220                 spin_unlock_irqrestore(&fimc->slock, flags);
1221         }
1222         mutex_unlock(&fimc->lock);
1223 
1224         v4l2_dbg(1, debug, sd, "%s: (%d,%d) %dx%d, f_w: %d, f_h: %d\n",
1225                  __func__, f->rect.left, f->rect.top, f->rect.width,
1226                  f->rect.height, f->f_width, f->f_height);
1227 
1228         return ret;
1229 }
1230 
1231 static int fimc_lite_subdev_s_stream(struct v4l2_subdev *sd, int on)
1232 {
1233         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1234         unsigned long flags;
1235         int ret;
1236 
1237         /*
1238          * Find sensor subdev linked to FIMC-LITE directly or through
1239          * MIPI-CSIS. This is required for configuration where FIMC-LITE
1240          * is used as a subdev only and feeds data internally to FIMC-IS.
1241          * The pipeline links are protected through entity.stream_count
1242          * so there is no need to take the media graph mutex here.
1243          */
1244         fimc->sensor = fimc_find_remote_sensor(&sd->entity);
1245 
1246         if (atomic_read(&fimc->out_path) != FIMC_IO_ISP)
1247                 return -ENOIOCTLCMD;
1248 
1249         mutex_lock(&fimc->lock);
1250         if (on) {
1251                 flite_hw_reset(fimc);
1252                 ret = fimc_lite_hw_init(fimc, true);
1253                 if (!ret) {
1254                         spin_lock_irqsave(&fimc->slock, flags);
1255                         flite_hw_capture_start(fimc);
1256                         spin_unlock_irqrestore(&fimc->slock, flags);
1257                 }
1258         } else {
1259                 set_bit(ST_FLITE_OFF, &fimc->state);
1260 
1261                 spin_lock_irqsave(&fimc->slock, flags);
1262                 flite_hw_capture_stop(fimc);
1263                 spin_unlock_irqrestore(&fimc->slock, flags);
1264 
1265                 ret = wait_event_timeout(fimc->irq_queue,
1266                                 !test_bit(ST_FLITE_OFF, &fimc->state),
1267                                 msecs_to_jiffies(200));
1268                 if (ret == 0)
1269                         v4l2_err(sd, "s_stream(0) timeout\n");
1270                 clear_bit(ST_FLITE_RUN, &fimc->state);
1271         }
1272 
1273         mutex_unlock(&fimc->lock);
1274         return ret;
1275 }
1276 
1277 static int fimc_lite_log_status(struct v4l2_subdev *sd)
1278 {
1279         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1280 
1281         flite_hw_dump_regs(fimc, __func__);
1282         return 0;
1283 }
1284 
1285 static int fimc_lite_subdev_registered(struct v4l2_subdev *sd)
1286 {
1287         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1288         struct vb2_queue *q = &fimc->vb_queue;
1289         struct video_device *vfd = &fimc->ve.vdev;
1290         int ret;
1291 
1292         memset(vfd, 0, sizeof(*vfd));
1293         atomic_set(&fimc->out_path, FIMC_IO_DMA);
1294 
1295         snprintf(vfd->name, sizeof(vfd->name), "fimc-lite.%d.capture",
1296                  fimc->index);
1297 
1298         vfd->fops = &fimc_lite_fops;
1299         vfd->ioctl_ops = &fimc_lite_ioctl_ops;
1300         vfd->v4l2_dev = sd->v4l2_dev;
1301         vfd->minor = -1;
1302         vfd->release = video_device_release_empty;
1303         vfd->queue = q;
1304         fimc->reqbufs_count = 0;
1305 
1306         INIT_LIST_HEAD(&fimc->pending_buf_q);
1307         INIT_LIST_HEAD(&fimc->active_buf_q);
1308 
1309         memset(q, 0, sizeof(*q));
1310         q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
1311         q->io_modes = VB2_MMAP | VB2_USERPTR;
1312         q->ops = &fimc_lite_qops;
1313         q->mem_ops = &vb2_dma_contig_memops;
1314         q->buf_struct_size = sizeof(struct flite_buffer);
1315         q->drv_priv = fimc;
1316         q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1317         q->lock = &fimc->lock;
1318 
1319         ret = vb2_queue_init(q);
1320         if (ret < 0)
1321                 return ret;
1322 
1323         fimc->vd_pad.flags = MEDIA_PAD_FL_SINK;
1324         ret = media_entity_init(&vfd->entity, 1, &fimc->vd_pad, 0);
1325         if (ret < 0)
1326                 return ret;
1327 
1328         video_set_drvdata(vfd, fimc);
1329         fimc->ve.pipe = v4l2_get_subdev_hostdata(sd);
1330 
1331         ret = video_register_device(vfd, VFL_TYPE_GRABBER, -1);
1332         if (ret < 0) {
1333                 media_entity_cleanup(&vfd->entity);
1334                 fimc->ve.pipe = NULL;
1335                 return ret;
1336         }
1337 
1338         v4l2_info(sd->v4l2_dev, "Registered %s as /dev/%s\n",
1339                   vfd->name, video_device_node_name(vfd));
1340         return 0;
1341 }
1342 
1343 static void fimc_lite_subdev_unregistered(struct v4l2_subdev *sd)
1344 {
1345         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1346 
1347         if (fimc == NULL)
1348                 return;
1349 
1350         mutex_lock(&fimc->lock);
1351 
1352         if (video_is_registered(&fimc->ve.vdev)) {
1353                 video_unregister_device(&fimc->ve.vdev);
1354                 media_entity_cleanup(&fimc->ve.vdev.entity);
1355                 fimc->ve.pipe = NULL;
1356         }
1357 
1358         mutex_unlock(&fimc->lock);
1359 }
1360 
1361 static const struct v4l2_subdev_internal_ops fimc_lite_subdev_internal_ops = {
1362         .registered = fimc_lite_subdev_registered,
1363         .unregistered = fimc_lite_subdev_unregistered,
1364 };
1365 
1366 static const struct v4l2_subdev_pad_ops fimc_lite_subdev_pad_ops = {
1367         .enum_mbus_code = fimc_lite_subdev_enum_mbus_code,
1368         .get_selection = fimc_lite_subdev_get_selection,
1369         .set_selection = fimc_lite_subdev_set_selection,
1370         .get_fmt = fimc_lite_subdev_get_fmt,
1371         .set_fmt = fimc_lite_subdev_set_fmt,
1372 };
1373 
1374 static const struct v4l2_subdev_video_ops fimc_lite_subdev_video_ops = {
1375         .s_stream = fimc_lite_subdev_s_stream,
1376 };
1377 
1378 static const struct v4l2_subdev_core_ops fimc_lite_core_ops = {
1379         .log_status = fimc_lite_log_status,
1380 };
1381 
1382 static struct v4l2_subdev_ops fimc_lite_subdev_ops = {
1383         .core = &fimc_lite_core_ops,
1384         .video = &fimc_lite_subdev_video_ops,
1385         .pad = &fimc_lite_subdev_pad_ops,
1386 };
1387 
1388 static int fimc_lite_s_ctrl(struct v4l2_ctrl *ctrl)
1389 {
1390         struct fimc_lite *fimc = container_of(ctrl->handler, struct fimc_lite,
1391                                               ctrl_handler);
1392         set_bit(ST_FLITE_CONFIG, &fimc->state);
1393         return 0;
1394 }
1395 
1396 static const struct v4l2_ctrl_ops fimc_lite_ctrl_ops = {
1397         .s_ctrl = fimc_lite_s_ctrl,
1398 };
1399 
1400 static const struct v4l2_ctrl_config fimc_lite_ctrl = {
1401         .ops    = &fimc_lite_ctrl_ops,
1402         .id     = V4L2_CTRL_CLASS_USER | 0x1001,
1403         .type   = V4L2_CTRL_TYPE_BOOLEAN,
1404         .name   = "Test Pattern 640x480",
1405         .step   = 1,
1406 };
1407 
1408 static void fimc_lite_set_default_config(struct fimc_lite *fimc)
1409 {
1410         struct flite_frame *sink = &fimc->inp_frame;
1411         struct flite_frame *source = &fimc->out_frame;
1412 
1413         sink->fmt = &fimc_lite_formats[0];
1414         sink->f_width = FLITE_DEFAULT_WIDTH;
1415         sink->f_height = FLITE_DEFAULT_HEIGHT;
1416 
1417         sink->rect.width = FLITE_DEFAULT_WIDTH;
1418         sink->rect.height = FLITE_DEFAULT_HEIGHT;
1419         sink->rect.left = 0;
1420         sink->rect.top = 0;
1421 
1422         *source = *sink;
1423 }
1424 
1425 static int fimc_lite_create_capture_subdev(struct fimc_lite *fimc)
1426 {
1427         struct v4l2_ctrl_handler *handler = &fimc->ctrl_handler;
1428         struct v4l2_subdev *sd = &fimc->subdev;
1429         int ret;
1430 
1431         v4l2_subdev_init(sd, &fimc_lite_subdev_ops);
1432         sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
1433         snprintf(sd->name, sizeof(sd->name), "FIMC-LITE.%d", fimc->index);
1434 
1435         fimc->subdev_pads[FLITE_SD_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
1436         fimc->subdev_pads[FLITE_SD_PAD_SOURCE_DMA].flags = MEDIA_PAD_FL_SOURCE;
1437         fimc->subdev_pads[FLITE_SD_PAD_SOURCE_ISP].flags = MEDIA_PAD_FL_SOURCE;
1438         ret = media_entity_init(&sd->entity, FLITE_SD_PADS_NUM,
1439                                 fimc->subdev_pads, 0);
1440         if (ret)
1441                 return ret;
1442 
1443         v4l2_ctrl_handler_init(handler, 1);
1444         fimc->test_pattern = v4l2_ctrl_new_custom(handler, &fimc_lite_ctrl,
1445                                                   NULL);
1446         if (handler->error) {
1447                 media_entity_cleanup(&sd->entity);
1448                 return handler->error;
1449         }
1450 
1451         sd->ctrl_handler = handler;
1452         sd->internal_ops = &fimc_lite_subdev_internal_ops;
1453         sd->entity.ops = &fimc_lite_subdev_media_ops;
1454         sd->owner = THIS_MODULE;
1455         v4l2_set_subdevdata(sd, fimc);
1456 
1457         return 0;
1458 }
1459 
1460 static void fimc_lite_unregister_capture_subdev(struct fimc_lite *fimc)
1461 {
1462         struct v4l2_subdev *sd = &fimc->subdev;
1463 
1464         v4l2_device_unregister_subdev(sd);
1465         media_entity_cleanup(&sd->entity);
1466         v4l2_ctrl_handler_free(&fimc->ctrl_handler);
1467         v4l2_set_subdevdata(sd, NULL);
1468 }
1469 
1470 static void fimc_lite_clk_put(struct fimc_lite *fimc)
1471 {
1472         if (IS_ERR(fimc->clock))
1473                 return;
1474 
1475         clk_unprepare(fimc->clock);
1476         clk_put(fimc->clock);
1477         fimc->clock = ERR_PTR(-EINVAL);
1478 }
1479 
1480 static int fimc_lite_clk_get(struct fimc_lite *fimc)
1481 {
1482         int ret;
1483 
1484         fimc->clock = clk_get(&fimc->pdev->dev, FLITE_CLK_NAME);
1485         if (IS_ERR(fimc->clock))
1486                 return PTR_ERR(fimc->clock);
1487 
1488         ret = clk_prepare(fimc->clock);
1489         if (ret < 0) {
1490                 clk_put(fimc->clock);
1491                 fimc->clock = ERR_PTR(-EINVAL);
1492         }
1493         return ret;
1494 }
1495 
1496 static const struct of_device_id flite_of_match[];
1497 
1498 static int fimc_lite_probe(struct platform_device *pdev)
1499 {
1500         struct flite_drvdata *drv_data = NULL;
1501         struct device *dev = &pdev->dev;
1502         const struct of_device_id *of_id;
1503         struct fimc_lite *fimc;
1504         struct resource *res;
1505         int ret;
1506 
1507         if (!dev->of_node)
1508                 return -ENODEV;
1509 
1510         fimc = devm_kzalloc(dev, sizeof(*fimc), GFP_KERNEL);
1511         if (!fimc)
1512                 return -ENOMEM;
1513 
1514         of_id = of_match_node(flite_of_match, dev->of_node);
1515         if (of_id)
1516                 drv_data = (struct flite_drvdata *)of_id->data;
1517         fimc->index = of_alias_get_id(dev->of_node, "fimc-lite");
1518 
1519         if (!drv_data || fimc->index >= drv_data->num_instances ||
1520                                                 fimc->index < 0) {
1521                 dev_err(dev, "Wrong %s node alias\n",
1522                                         dev->of_node->full_name);
1523                 return -EINVAL;
1524         }
1525 
1526         fimc->dd = drv_data;
1527         fimc->pdev = pdev;
1528 
1529         init_waitqueue_head(&fimc->irq_queue);
1530         spin_lock_init(&fimc->slock);
1531         mutex_init(&fimc->lock);
1532 
1533         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1534         fimc->regs = devm_ioremap_resource(dev, res);
1535         if (IS_ERR(fimc->regs))
1536                 return PTR_ERR(fimc->regs);
1537 
1538         res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1539         if (res == NULL) {
1540                 dev_err(dev, "Failed to get IRQ resource\n");
1541                 return -ENXIO;
1542         }
1543 
1544         ret = fimc_lite_clk_get(fimc);
1545         if (ret)
1546                 return ret;
1547 
1548         ret = devm_request_irq(dev, res->start, flite_irq_handler,
1549                                0, dev_name(dev), fimc);
1550         if (ret) {
1551                 dev_err(dev, "Failed to install irq (%d)\n", ret);
1552                 goto err_clk_put;
1553         }
1554 
1555         /* The video node will be created within the subdev's registered() op */
1556         ret = fimc_lite_create_capture_subdev(fimc);
1557         if (ret)
1558                 goto err_clk_put;
1559 
1560         platform_set_drvdata(pdev, fimc);
1561         pm_runtime_enable(dev);
1562 
1563         if (!pm_runtime_enabled(dev)) {
1564                 ret = clk_enable(fimc->clock);
1565                 if (ret < 0)
1566                         goto err_sd;
1567         }
1568 
1569         fimc->alloc_ctx = vb2_dma_contig_init_ctx(dev);
1570         if (IS_ERR(fimc->alloc_ctx)) {
1571                 ret = PTR_ERR(fimc->alloc_ctx);
1572                 goto err_clk_dis;
1573         }
1574 
1575         fimc_lite_set_default_config(fimc);
1576 
1577         dev_dbg(dev, "FIMC-LITE.%d registered successfully\n",
1578                 fimc->index);
1579         return 0;
1580 
1581 err_clk_dis:
1582         if (!pm_runtime_enabled(dev))
1583                 clk_disable(fimc->clock);
1584 err_sd:
1585         fimc_lite_unregister_capture_subdev(fimc);
1586 err_clk_put:
1587         fimc_lite_clk_put(fimc);
1588         return ret;
1589 }
1590 
1591 #ifdef CONFIG_PM_RUNTIME
1592 static int fimc_lite_runtime_resume(struct device *dev)
1593 {
1594         struct fimc_lite *fimc = dev_get_drvdata(dev);
1595 
1596         clk_enable(fimc->clock);
1597         return 0;
1598 }
1599 
1600 static int fimc_lite_runtime_suspend(struct device *dev)
1601 {
1602         struct fimc_lite *fimc = dev_get_drvdata(dev);
1603 
1604         clk_disable(fimc->clock);
1605         return 0;
1606 }
1607 #endif
1608 
1609 #ifdef CONFIG_PM_SLEEP
1610 static int fimc_lite_resume(struct device *dev)
1611 {
1612         struct fimc_lite *fimc = dev_get_drvdata(dev);
1613         struct flite_buffer *buf;
1614         unsigned long flags;
1615         int i;
1616 
1617         spin_lock_irqsave(&fimc->slock, flags);
1618         if (!test_and_clear_bit(ST_LPM, &fimc->state) ||
1619             !test_bit(ST_FLITE_IN_USE, &fimc->state)) {
1620                 spin_unlock_irqrestore(&fimc->slock, flags);
1621                 return 0;
1622         }
1623         flite_hw_reset(fimc);
1624         spin_unlock_irqrestore(&fimc->slock, flags);
1625 
1626         if (!test_and_clear_bit(ST_FLITE_SUSPENDED, &fimc->state))
1627                 return 0;
1628 
1629         INIT_LIST_HEAD(&fimc->active_buf_q);
1630         fimc_pipeline_call(&fimc->ve, open,
1631                            &fimc->ve.vdev.entity, false);
1632         fimc_lite_hw_init(fimc, atomic_read(&fimc->out_path) == FIMC_IO_ISP);
1633         clear_bit(ST_FLITE_SUSPENDED, &fimc->state);
1634 
1635         for (i = 0; i < fimc->reqbufs_count; i++) {
1636                 if (list_empty(&fimc->pending_buf_q))
1637                         break;
1638                 buf = fimc_lite_pending_queue_pop(fimc);
1639                 buffer_queue(&buf->vb);
1640         }
1641         return 0;
1642 }
1643 
1644 static int fimc_lite_suspend(struct device *dev)
1645 {
1646         struct fimc_lite *fimc = dev_get_drvdata(dev);
1647         bool suspend = test_bit(ST_FLITE_IN_USE, &fimc->state);
1648         int ret;
1649 
1650         if (test_and_set_bit(ST_LPM, &fimc->state))
1651                 return 0;
1652 
1653         ret = fimc_lite_stop_capture(fimc, suspend);
1654         if (ret < 0 || !fimc_lite_active(fimc))
1655                 return ret;
1656 
1657         return fimc_pipeline_call(&fimc->ve, close);
1658 }
1659 #endif /* CONFIG_PM_SLEEP */
1660 
1661 static int fimc_lite_remove(struct platform_device *pdev)
1662 {
1663         struct fimc_lite *fimc = platform_get_drvdata(pdev);
1664         struct device *dev = &pdev->dev;
1665 
1666         pm_runtime_disable(dev);
1667         pm_runtime_set_suspended(dev);
1668         fimc_lite_unregister_capture_subdev(fimc);
1669         vb2_dma_contig_cleanup_ctx(fimc->alloc_ctx);
1670         fimc_lite_clk_put(fimc);
1671 
1672         dev_info(dev, "Driver unloaded\n");
1673         return 0;
1674 }
1675 
1676 static const struct dev_pm_ops fimc_lite_pm_ops = {
1677         SET_SYSTEM_SLEEP_PM_OPS(fimc_lite_suspend, fimc_lite_resume)
1678         SET_RUNTIME_PM_OPS(fimc_lite_runtime_suspend, fimc_lite_runtime_resume,
1679                            NULL)
1680 };
1681 
1682 /* EXYNOS4212, EXYNOS4412 */
1683 static struct flite_drvdata fimc_lite_drvdata_exynos4 = {
1684         .max_width              = 8192,
1685         .max_height             = 8192,
1686         .out_width_align        = 8,
1687         .win_hor_offs_align     = 2,
1688         .out_hor_offs_align     = 8,
1689         .max_dma_bufs           = 1,
1690         .num_instances          = 2,
1691 };
1692 
1693 /* EXYNOS5250 */
1694 static struct flite_drvdata fimc_lite_drvdata_exynos5 = {
1695         .max_width              = 8192,
1696         .max_height             = 8192,
1697         .out_width_align        = 8,
1698         .win_hor_offs_align     = 2,
1699         .out_hor_offs_align     = 8,
1700         .max_dma_bufs           = 32,
1701         .num_instances          = 3,
1702 };
1703 
1704 static const struct of_device_id flite_of_match[] = {
1705         {
1706                 .compatible = "samsung,exynos4212-fimc-lite",
1707                 .data = &fimc_lite_drvdata_exynos4,
1708         },
1709         {
1710                 .compatible = "samsung,exynos5250-fimc-lite",
1711                 .data = &fimc_lite_drvdata_exynos5,
1712         },
1713         { /* sentinel */ },
1714 };
1715 MODULE_DEVICE_TABLE(of, flite_of_match);
1716 
1717 static struct platform_driver fimc_lite_driver = {
1718         .probe          = fimc_lite_probe,
1719         .remove         = fimc_lite_remove,
1720         .driver = {
1721                 .of_match_table = flite_of_match,
1722                 .name           = FIMC_LITE_DRV_NAME,
1723                 .owner          = THIS_MODULE,
1724                 .pm             = &fimc_lite_pm_ops,
1725         }
1726 };
1727 module_platform_driver(fimc_lite_driver);
1728 MODULE_LICENSE("GPL");
1729 MODULE_ALIAS("platform:" FIMC_LITE_DRV_NAME);
1730 

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