Version:  2.0.40 2.2.26 2.4.37 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4

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-v4l2.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      = MEDIA_BUS_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      = MEDIA_BUS_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      = MEDIA_BUS_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      = MEDIA_BUS_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      = MEDIA_BUS_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      = MEDIA_BUS_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      = MEDIA_BUS_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, 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, 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         u32 intsrc;
258 
259         spin_lock_irqsave(&fimc->slock, flags);
260 
261         intsrc = flite_hw_get_interrupt_source(fimc);
262         flite_hw_clear_pending_irq(fimc);
263 
264         if (test_and_clear_bit(ST_FLITE_OFF, &fimc->state)) {
265                 wake_up(&fimc->irq_queue);
266                 goto done;
267         }
268 
269         if (intsrc & FLITE_REG_CISTATUS_IRQ_SRC_OVERFLOW) {
270                 clear_bit(ST_FLITE_RUN, &fimc->state);
271                 fimc->events.data_overflow++;
272         }
273 
274         if (intsrc & FLITE_REG_CISTATUS_IRQ_SRC_LASTCAPEND) {
275                 flite_hw_clear_last_capture_end(fimc);
276                 clear_bit(ST_FLITE_STREAM, &fimc->state);
277                 wake_up(&fimc->irq_queue);
278         }
279 
280         if (atomic_read(&fimc->out_path) != FIMC_IO_DMA)
281                 goto done;
282 
283         if ((intsrc & FLITE_REG_CISTATUS_IRQ_SRC_FRMSTART) &&
284             test_bit(ST_FLITE_RUN, &fimc->state) &&
285             !list_empty(&fimc->pending_buf_q)) {
286                 vbuf = fimc_lite_pending_queue_pop(fimc);
287                 flite_hw_set_dma_buffer(fimc, vbuf);
288                 fimc_lite_active_queue_add(fimc, vbuf);
289         }
290 
291         if ((intsrc & FLITE_REG_CISTATUS_IRQ_SRC_FRMEND) &&
292             test_bit(ST_FLITE_RUN, &fimc->state) &&
293             !list_empty(&fimc->active_buf_q)) {
294                 vbuf = fimc_lite_active_queue_pop(fimc);
295                 v4l2_get_timestamp(&vbuf->vb.timestamp);
296                 vbuf->vb.sequence = fimc->frame_count++;
297                 flite_hw_mask_dma_buffer(fimc, vbuf->index);
298                 vb2_buffer_done(&vbuf->vb.vb2_buf, VB2_BUF_STATE_DONE);
299         }
300 
301         if (test_bit(ST_FLITE_CONFIG, &fimc->state))
302                 fimc_lite_config_update(fimc);
303 
304         if (list_empty(&fimc->pending_buf_q)) {
305                 flite_hw_capture_stop(fimc);
306                 clear_bit(ST_FLITE_STREAM, &fimc->state);
307         }
308 done:
309         set_bit(ST_FLITE_RUN, &fimc->state);
310         spin_unlock_irqrestore(&fimc->slock, flags);
311         return IRQ_HANDLED;
312 }
313 
314 static int start_streaming(struct vb2_queue *q, unsigned int count)
315 {
316         struct fimc_lite *fimc = q->drv_priv;
317         unsigned long flags;
318         int ret;
319 
320         spin_lock_irqsave(&fimc->slock, flags);
321 
322         fimc->buf_index = 0;
323         fimc->frame_count = 0;
324 
325         spin_unlock_irqrestore(&fimc->slock, flags);
326 
327         ret = fimc_lite_hw_init(fimc, false);
328         if (ret) {
329                 fimc_lite_reinit(fimc, false);
330                 return ret;
331         }
332 
333         set_bit(ST_FLITE_PENDING, &fimc->state);
334 
335         if (!list_empty(&fimc->active_buf_q) &&
336             !test_and_set_bit(ST_FLITE_STREAM, &fimc->state)) {
337                 flite_hw_capture_start(fimc);
338 
339                 if (!test_and_set_bit(ST_SENSOR_STREAM, &fimc->state))
340                         fimc_pipeline_call(&fimc->ve, set_stream, 1);
341         }
342         if (debug > 0)
343                 flite_hw_dump_regs(fimc, __func__);
344 
345         return 0;
346 }
347 
348 static void stop_streaming(struct vb2_queue *q)
349 {
350         struct fimc_lite *fimc = q->drv_priv;
351 
352         if (!fimc_lite_active(fimc))
353                 return;
354 
355         fimc_lite_stop_capture(fimc, false);
356 }
357 
358 static int queue_setup(struct vb2_queue *vq, const void *parg,
359                        unsigned int *num_buffers, unsigned int *num_planes,
360                        unsigned int sizes[], void *allocators[])
361 {
362         const struct v4l2_format *pfmt = parg;
363         const struct v4l2_pix_format_mplane *pixm = NULL;
364         struct fimc_lite *fimc = vq->drv_priv;
365         struct flite_frame *frame = &fimc->out_frame;
366         const struct fimc_fmt *fmt = frame->fmt;
367         unsigned long wh;
368         int i;
369 
370         if (pfmt) {
371                 pixm = &pfmt->fmt.pix_mp;
372                 fmt = fimc_lite_find_format(&pixm->pixelformat, NULL, 0, -1);
373                 wh = pixm->width * pixm->height;
374         } else {
375                 wh = frame->f_width * frame->f_height;
376         }
377 
378         if (fmt == NULL)
379                 return -EINVAL;
380 
381         *num_planes = fmt->memplanes;
382 
383         for (i = 0; i < fmt->memplanes; i++) {
384                 unsigned int size = (wh * fmt->depth[i]) / 8;
385                 if (pixm)
386                         sizes[i] = max(size, pixm->plane_fmt[i].sizeimage);
387                 else
388                         sizes[i] = size;
389                 allocators[i] = fimc->alloc_ctx;
390         }
391 
392         return 0;
393 }
394 
395 static int buffer_prepare(struct vb2_buffer *vb)
396 {
397         struct vb2_queue *vq = vb->vb2_queue;
398         struct fimc_lite *fimc = vq->drv_priv;
399         int i;
400 
401         if (fimc->out_frame.fmt == NULL)
402                 return -EINVAL;
403 
404         for (i = 0; i < fimc->out_frame.fmt->memplanes; i++) {
405                 unsigned long size = fimc->payload[i];
406 
407                 if (vb2_plane_size(vb, i) < size) {
408                         v4l2_err(&fimc->ve.vdev,
409                                  "User buffer too small (%ld < %ld)\n",
410                                  vb2_plane_size(vb, i), size);
411                         return -EINVAL;
412                 }
413                 vb2_set_plane_payload(vb, i, size);
414         }
415 
416         return 0;
417 }
418 
419 static void buffer_queue(struct vb2_buffer *vb)
420 {
421         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
422         struct flite_buffer *buf
423                 = container_of(vbuf, struct flite_buffer, vb);
424         struct fimc_lite *fimc = vb2_get_drv_priv(vb->vb2_queue);
425         unsigned long flags;
426 
427         spin_lock_irqsave(&fimc->slock, flags);
428         buf->paddr = vb2_dma_contig_plane_dma_addr(vb, 0);
429 
430         buf->index = fimc->buf_index++;
431         if (fimc->buf_index >= fimc->reqbufs_count)
432                 fimc->buf_index = 0;
433 
434         if (!test_bit(ST_FLITE_SUSPENDED, &fimc->state) &&
435             !test_bit(ST_FLITE_STREAM, &fimc->state) &&
436             list_empty(&fimc->active_buf_q)) {
437                 flite_hw_set_dma_buffer(fimc, buf);
438                 fimc_lite_active_queue_add(fimc, buf);
439         } else {
440                 fimc_lite_pending_queue_add(fimc, buf);
441         }
442 
443         if (vb2_is_streaming(&fimc->vb_queue) &&
444             !list_empty(&fimc->pending_buf_q) &&
445             !test_and_set_bit(ST_FLITE_STREAM, &fimc->state)) {
446                 flite_hw_capture_start(fimc);
447                 spin_unlock_irqrestore(&fimc->slock, flags);
448 
449                 if (!test_and_set_bit(ST_SENSOR_STREAM, &fimc->state))
450                         fimc_pipeline_call(&fimc->ve, set_stream, 1);
451                 return;
452         }
453         spin_unlock_irqrestore(&fimc->slock, flags);
454 }
455 
456 static const struct vb2_ops fimc_lite_qops = {
457         .queue_setup     = queue_setup,
458         .buf_prepare     = buffer_prepare,
459         .buf_queue       = buffer_queue,
460         .wait_prepare    = vb2_ops_wait_prepare,
461         .wait_finish     = vb2_ops_wait_finish,
462         .start_streaming = start_streaming,
463         .stop_streaming  = stop_streaming,
464 };
465 
466 static void fimc_lite_clear_event_counters(struct fimc_lite *fimc)
467 {
468         unsigned long flags;
469 
470         spin_lock_irqsave(&fimc->slock, flags);
471         memset(&fimc->events, 0, sizeof(fimc->events));
472         spin_unlock_irqrestore(&fimc->slock, flags);
473 }
474 
475 static int fimc_lite_open(struct file *file)
476 {
477         struct fimc_lite *fimc = video_drvdata(file);
478         struct media_entity *me = &fimc->ve.vdev.entity;
479         int ret;
480 
481         mutex_lock(&fimc->lock);
482         if (atomic_read(&fimc->out_path) != FIMC_IO_DMA) {
483                 ret = -EBUSY;
484                 goto unlock;
485         }
486 
487         set_bit(ST_FLITE_IN_USE, &fimc->state);
488         ret = pm_runtime_get_sync(&fimc->pdev->dev);
489         if (ret < 0)
490                 goto unlock;
491 
492         ret = v4l2_fh_open(file);
493         if (ret < 0)
494                 goto err_pm;
495 
496         if (!v4l2_fh_is_singular_file(file) ||
497             atomic_read(&fimc->out_path) != FIMC_IO_DMA)
498                 goto unlock;
499 
500         mutex_lock(&me->parent->graph_mutex);
501 
502         ret = fimc_pipeline_call(&fimc->ve, open, me, true);
503 
504         /* Mark video pipeline ending at this video node as in use. */
505         if (ret == 0)
506                 me->use_count++;
507 
508         mutex_unlock(&me->parent->graph_mutex);
509 
510         if (!ret) {
511                 fimc_lite_clear_event_counters(fimc);
512                 goto unlock;
513         }
514 
515         v4l2_fh_release(file);
516 err_pm:
517         pm_runtime_put_sync(&fimc->pdev->dev);
518         clear_bit(ST_FLITE_IN_USE, &fimc->state);
519 unlock:
520         mutex_unlock(&fimc->lock);
521         return ret;
522 }
523 
524 static int fimc_lite_release(struct file *file)
525 {
526         struct fimc_lite *fimc = video_drvdata(file);
527         struct media_entity *entity = &fimc->ve.vdev.entity;
528 
529         mutex_lock(&fimc->lock);
530 
531         if (v4l2_fh_is_singular_file(file) &&
532             atomic_read(&fimc->out_path) == FIMC_IO_DMA) {
533                 if (fimc->streaming) {
534                         media_entity_pipeline_stop(entity);
535                         fimc->streaming = false;
536                 }
537                 fimc_lite_stop_capture(fimc, false);
538                 fimc_pipeline_call(&fimc->ve, close);
539                 clear_bit(ST_FLITE_IN_USE, &fimc->state);
540 
541                 mutex_lock(&entity->parent->graph_mutex);
542                 entity->use_count--;
543                 mutex_unlock(&entity->parent->graph_mutex);
544         }
545 
546         _vb2_fop_release(file, NULL);
547         pm_runtime_put(&fimc->pdev->dev);
548         clear_bit(ST_FLITE_SUSPENDED, &fimc->state);
549 
550         mutex_unlock(&fimc->lock);
551         return 0;
552 }
553 
554 static const struct v4l2_file_operations fimc_lite_fops = {
555         .owner          = THIS_MODULE,
556         .open           = fimc_lite_open,
557         .release        = fimc_lite_release,
558         .poll           = vb2_fop_poll,
559         .unlocked_ioctl = video_ioctl2,
560         .mmap           = vb2_fop_mmap,
561 };
562 
563 /*
564  * Format and crop negotiation helpers
565  */
566 
567 static const struct fimc_fmt *fimc_lite_subdev_try_fmt(struct fimc_lite *fimc,
568                                         struct v4l2_subdev_pad_config *cfg,
569                                         struct v4l2_subdev_format *format)
570 {
571         struct flite_drvdata *dd = fimc->dd;
572         struct v4l2_mbus_framefmt *mf = &format->format;
573         const struct fimc_fmt *fmt = NULL;
574 
575         if (format->pad == FLITE_SD_PAD_SINK) {
576                 v4l_bound_align_image(&mf->width, 8, dd->max_width,
577                                 ffs(dd->out_width_align) - 1,
578                                 &mf->height, 0, dd->max_height, 0, 0);
579 
580                 fmt = fimc_lite_find_format(NULL, &mf->code, 0, 0);
581                 if (WARN_ON(!fmt))
582                         return NULL;
583 
584                 mf->colorspace = fmt->colorspace;
585                 mf->code = fmt->mbus_code;
586         } else {
587                 struct flite_frame *sink = &fimc->inp_frame;
588                 struct v4l2_mbus_framefmt *sink_fmt;
589                 struct v4l2_rect *rect;
590 
591                 if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
592                         sink_fmt = v4l2_subdev_get_try_format(&fimc->subdev, cfg,
593                                                 FLITE_SD_PAD_SINK);
594 
595                         mf->code = sink_fmt->code;
596                         mf->colorspace = sink_fmt->colorspace;
597 
598                         rect = v4l2_subdev_get_try_crop(&fimc->subdev, cfg,
599                                                 FLITE_SD_PAD_SINK);
600                 } else {
601                         mf->code = sink->fmt->mbus_code;
602                         mf->colorspace = sink->fmt->colorspace;
603                         rect = &sink->rect;
604                 }
605 
606                 /* Allow changing format only on sink pad */
607                 mf->width = rect->width;
608                 mf->height = rect->height;
609         }
610 
611         mf->field = V4L2_FIELD_NONE;
612 
613         v4l2_dbg(1, debug, &fimc->subdev, "code: %#x (%d), %dx%d\n",
614                  mf->code, mf->colorspace, mf->width, mf->height);
615 
616         return fmt;
617 }
618 
619 static void fimc_lite_try_crop(struct fimc_lite *fimc, struct v4l2_rect *r)
620 {
621         struct flite_frame *frame = &fimc->inp_frame;
622 
623         v4l_bound_align_image(&r->width, 0, frame->f_width, 0,
624                               &r->height, 0, frame->f_height, 0, 0);
625 
626         /* Adjust left/top if cropping rectangle got out of bounds */
627         r->left = clamp_t(u32, r->left, 0, frame->f_width - r->width);
628         r->left = round_down(r->left, fimc->dd->win_hor_offs_align);
629         r->top  = clamp_t(u32, r->top, 0, frame->f_height - r->height);
630 
631         v4l2_dbg(1, debug, &fimc->subdev, "(%d,%d)/%dx%d, sink fmt: %dx%d\n",
632                  r->left, r->top, r->width, r->height,
633                  frame->f_width, frame->f_height);
634 }
635 
636 static void fimc_lite_try_compose(struct fimc_lite *fimc, struct v4l2_rect *r)
637 {
638         struct flite_frame *frame = &fimc->out_frame;
639         struct v4l2_rect *crop_rect = &fimc->inp_frame.rect;
640 
641         /* Scaling is not supported so we enforce compose rectangle size
642            same as size of the sink crop rectangle. */
643         r->width = crop_rect->width;
644         r->height = crop_rect->height;
645 
646         /* Adjust left/top if the composing rectangle got out of bounds */
647         r->left = clamp_t(u32, r->left, 0, frame->f_width - r->width);
648         r->left = round_down(r->left, fimc->dd->out_hor_offs_align);
649         r->top  = clamp_t(u32, r->top, 0, fimc->out_frame.f_height - r->height);
650 
651         v4l2_dbg(1, debug, &fimc->subdev, "(%d,%d)/%dx%d, source fmt: %dx%d\n",
652                  r->left, r->top, r->width, r->height,
653                  frame->f_width, frame->f_height);
654 }
655 
656 /*
657  * Video node ioctl operations
658  */
659 static int fimc_lite_querycap(struct file *file, void *priv,
660                                         struct v4l2_capability *cap)
661 {
662         struct fimc_lite *fimc = video_drvdata(file);
663 
664         strlcpy(cap->driver, FIMC_LITE_DRV_NAME, sizeof(cap->driver));
665         strlcpy(cap->card, FIMC_LITE_DRV_NAME, sizeof(cap->card));
666         snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
667                                         dev_name(&fimc->pdev->dev));
668 
669         cap->device_caps = V4L2_CAP_STREAMING;
670         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
671         return 0;
672 }
673 
674 static int fimc_lite_enum_fmt_mplane(struct file *file, void *priv,
675                                      struct v4l2_fmtdesc *f)
676 {
677         const struct fimc_fmt *fmt;
678 
679         if (f->index >= ARRAY_SIZE(fimc_lite_formats))
680                 return -EINVAL;
681 
682         fmt = &fimc_lite_formats[f->index];
683         strlcpy(f->description, fmt->name, sizeof(f->description));
684         f->pixelformat = fmt->fourcc;
685 
686         return 0;
687 }
688 
689 static int fimc_lite_g_fmt_mplane(struct file *file, void *fh,
690                                   struct v4l2_format *f)
691 {
692         struct fimc_lite *fimc = video_drvdata(file);
693         struct v4l2_pix_format_mplane *pixm = &f->fmt.pix_mp;
694         struct v4l2_plane_pix_format *plane_fmt = &pixm->plane_fmt[0];
695         struct flite_frame *frame = &fimc->out_frame;
696         const struct fimc_fmt *fmt = frame->fmt;
697 
698         plane_fmt->bytesperline = (frame->f_width * fmt->depth[0]) / 8;
699         plane_fmt->sizeimage = plane_fmt->bytesperline * frame->f_height;
700 
701         pixm->num_planes = fmt->memplanes;
702         pixm->pixelformat = fmt->fourcc;
703         pixm->width = frame->f_width;
704         pixm->height = frame->f_height;
705         pixm->field = V4L2_FIELD_NONE;
706         pixm->colorspace = fmt->colorspace;
707         return 0;
708 }
709 
710 static int fimc_lite_try_fmt(struct fimc_lite *fimc,
711                              struct v4l2_pix_format_mplane *pixm,
712                              const struct fimc_fmt **ffmt)
713 {
714         u32 bpl = pixm->plane_fmt[0].bytesperline;
715         struct flite_drvdata *dd = fimc->dd;
716         const struct fimc_fmt *inp_fmt = fimc->inp_frame.fmt;
717         const struct fimc_fmt *fmt;
718 
719         if (WARN_ON(inp_fmt == NULL))
720                 return -EINVAL;
721         /*
722          * We allow some flexibility only for YUV formats. In case of raw
723          * raw Bayer the FIMC-LITE's output format must match its camera
724          * interface input format.
725          */
726         if (inp_fmt->flags & FMT_FLAGS_YUV)
727                 fmt = fimc_lite_find_format(&pixm->pixelformat, NULL,
728                                                 inp_fmt->flags, 0);
729         else
730                 fmt = inp_fmt;
731 
732         if (WARN_ON(fmt == NULL))
733                 return -EINVAL;
734         if (ffmt)
735                 *ffmt = fmt;
736         v4l_bound_align_image(&pixm->width, 8, dd->max_width,
737                               ffs(dd->out_width_align) - 1,
738                               &pixm->height, 0, dd->max_height, 0, 0);
739 
740         if ((bpl == 0 || ((bpl * 8) / fmt->depth[0]) < pixm->width))
741                 pixm->plane_fmt[0].bytesperline = (pixm->width *
742                                                    fmt->depth[0]) / 8;
743 
744         if (pixm->plane_fmt[0].sizeimage == 0)
745                 pixm->plane_fmt[0].sizeimage = (pixm->width * pixm->height *
746                                                 fmt->depth[0]) / 8;
747         pixm->num_planes = fmt->memplanes;
748         pixm->pixelformat = fmt->fourcc;
749         pixm->colorspace = fmt->colorspace;
750         pixm->field = V4L2_FIELD_NONE;
751         return 0;
752 }
753 
754 static int fimc_lite_try_fmt_mplane(struct file *file, void *fh,
755                                     struct v4l2_format *f)
756 {
757         struct fimc_lite *fimc = video_drvdata(file);
758         return fimc_lite_try_fmt(fimc, &f->fmt.pix_mp, NULL);
759 }
760 
761 static int fimc_lite_s_fmt_mplane(struct file *file, void *priv,
762                                   struct v4l2_format *f)
763 {
764         struct v4l2_pix_format_mplane *pixm = &f->fmt.pix_mp;
765         struct fimc_lite *fimc = video_drvdata(file);
766         struct flite_frame *frame = &fimc->out_frame;
767         const struct fimc_fmt *fmt = NULL;
768         int ret;
769 
770         if (vb2_is_busy(&fimc->vb_queue))
771                 return -EBUSY;
772 
773         ret = fimc_lite_try_fmt(fimc, &f->fmt.pix_mp, &fmt);
774         if (ret < 0)
775                 return ret;
776 
777         frame->fmt = fmt;
778         fimc->payload[0] = max((pixm->width * pixm->height * fmt->depth[0]) / 8,
779                                pixm->plane_fmt[0].sizeimage);
780         frame->f_width = pixm->width;
781         frame->f_height = pixm->height;
782 
783         return 0;
784 }
785 
786 static int fimc_pipeline_validate(struct fimc_lite *fimc)
787 {
788         struct v4l2_subdev *sd = &fimc->subdev;
789         struct v4l2_subdev_format sink_fmt, src_fmt;
790         struct media_pad *pad;
791         int ret;
792 
793         while (1) {
794                 /* Retrieve format at the sink pad */
795                 pad = &sd->entity.pads[0];
796                 if (!(pad->flags & MEDIA_PAD_FL_SINK))
797                         break;
798                 /* Don't call FIMC subdev operation to avoid nested locking */
799                 if (sd == &fimc->subdev) {
800                         struct flite_frame *ff = &fimc->out_frame;
801                         sink_fmt.format.width = ff->f_width;
802                         sink_fmt.format.height = ff->f_height;
803                         sink_fmt.format.code = fimc->inp_frame.fmt->mbus_code;
804                 } else {
805                         sink_fmt.pad = pad->index;
806                         sink_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
807                         ret = v4l2_subdev_call(sd, pad, get_fmt, NULL,
808                                                &sink_fmt);
809                         if (ret < 0 && ret != -ENOIOCTLCMD)
810                                 return -EPIPE;
811                 }
812                 /* Retrieve format at the source pad */
813                 pad = media_entity_remote_pad(pad);
814                 if (pad == NULL ||
815                     media_entity_type(pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
816                         break;
817 
818                 sd = media_entity_to_v4l2_subdev(pad->entity);
819                 src_fmt.pad = pad->index;
820                 src_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
821                 ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &src_fmt);
822                 if (ret < 0 && ret != -ENOIOCTLCMD)
823                         return -EPIPE;
824 
825                 if (src_fmt.format.width != sink_fmt.format.width ||
826                     src_fmt.format.height != sink_fmt.format.height ||
827                     src_fmt.format.code != sink_fmt.format.code)
828                         return -EPIPE;
829         }
830         return 0;
831 }
832 
833 static int fimc_lite_streamon(struct file *file, void *priv,
834                               enum v4l2_buf_type type)
835 {
836         struct fimc_lite *fimc = video_drvdata(file);
837         struct media_entity *entity = &fimc->ve.vdev.entity;
838         int ret;
839 
840         if (fimc_lite_active(fimc))
841                 return -EBUSY;
842 
843         ret = media_entity_pipeline_start(entity, &fimc->ve.pipe->mp);
844         if (ret < 0)
845                 return ret;
846 
847         ret = fimc_pipeline_validate(fimc);
848         if (ret < 0)
849                 goto err_p_stop;
850 
851         fimc->sensor = fimc_find_remote_sensor(&fimc->subdev.entity);
852 
853         ret = vb2_ioctl_streamon(file, priv, type);
854         if (!ret) {
855                 fimc->streaming = true;
856                 return ret;
857         }
858 
859 err_p_stop:
860         media_entity_pipeline_stop(entity);
861         return 0;
862 }
863 
864 static int fimc_lite_streamoff(struct file *file, void *priv,
865                                enum v4l2_buf_type type)
866 {
867         struct fimc_lite *fimc = video_drvdata(file);
868         int ret;
869 
870         ret = vb2_ioctl_streamoff(file, priv, type);
871         if (ret < 0)
872                 return ret;
873 
874         media_entity_pipeline_stop(&fimc->ve.vdev.entity);
875         fimc->streaming = false;
876         return 0;
877 }
878 
879 static int fimc_lite_reqbufs(struct file *file, void *priv,
880                              struct v4l2_requestbuffers *reqbufs)
881 {
882         struct fimc_lite *fimc = video_drvdata(file);
883         int ret;
884 
885         reqbufs->count = max_t(u32, FLITE_REQ_BUFS_MIN, reqbufs->count);
886         ret = vb2_ioctl_reqbufs(file, priv, reqbufs);
887         if (!ret)
888                 fimc->reqbufs_count = reqbufs->count;
889 
890         return ret;
891 }
892 
893 /* Return 1 if rectangle a is enclosed in rectangle b, or 0 otherwise. */
894 static int enclosed_rectangle(struct v4l2_rect *a, struct v4l2_rect *b)
895 {
896         if (a->left < b->left || a->top < b->top)
897                 return 0;
898         if (a->left + a->width > b->left + b->width)
899                 return 0;
900         if (a->top + a->height > b->top + b->height)
901                 return 0;
902 
903         return 1;
904 }
905 
906 static int fimc_lite_g_selection(struct file *file, void *fh,
907                                  struct v4l2_selection *sel)
908 {
909         struct fimc_lite *fimc = video_drvdata(file);
910         struct flite_frame *f = &fimc->out_frame;
911 
912         if (sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
913                 return -EINVAL;
914 
915         switch (sel->target) {
916         case V4L2_SEL_TGT_COMPOSE_BOUNDS:
917         case V4L2_SEL_TGT_COMPOSE_DEFAULT:
918                 sel->r.left = 0;
919                 sel->r.top = 0;
920                 sel->r.width = f->f_width;
921                 sel->r.height = f->f_height;
922                 return 0;
923 
924         case V4L2_SEL_TGT_COMPOSE:
925                 sel->r = f->rect;
926                 return 0;
927         }
928 
929         return -EINVAL;
930 }
931 
932 static int fimc_lite_s_selection(struct file *file, void *fh,
933                                  struct v4l2_selection *sel)
934 {
935         struct fimc_lite *fimc = video_drvdata(file);
936         struct flite_frame *f = &fimc->out_frame;
937         struct v4l2_rect rect = sel->r;
938         unsigned long flags;
939 
940         if (sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE ||
941             sel->target != V4L2_SEL_TGT_COMPOSE)
942                 return -EINVAL;
943 
944         fimc_lite_try_compose(fimc, &rect);
945 
946         if ((sel->flags & V4L2_SEL_FLAG_LE) &&
947             !enclosed_rectangle(&rect, &sel->r))
948                 return -ERANGE;
949 
950         if ((sel->flags & V4L2_SEL_FLAG_GE) &&
951             !enclosed_rectangle(&sel->r, &rect))
952                 return -ERANGE;
953 
954         sel->r = rect;
955         spin_lock_irqsave(&fimc->slock, flags);
956         f->rect = rect;
957         set_bit(ST_FLITE_CONFIG, &fimc->state);
958         spin_unlock_irqrestore(&fimc->slock, flags);
959 
960         return 0;
961 }
962 
963 static const struct v4l2_ioctl_ops fimc_lite_ioctl_ops = {
964         .vidioc_querycap                = fimc_lite_querycap,
965         .vidioc_enum_fmt_vid_cap_mplane = fimc_lite_enum_fmt_mplane,
966         .vidioc_try_fmt_vid_cap_mplane  = fimc_lite_try_fmt_mplane,
967         .vidioc_s_fmt_vid_cap_mplane    = fimc_lite_s_fmt_mplane,
968         .vidioc_g_fmt_vid_cap_mplane    = fimc_lite_g_fmt_mplane,
969         .vidioc_g_selection             = fimc_lite_g_selection,
970         .vidioc_s_selection             = fimc_lite_s_selection,
971         .vidioc_reqbufs                 = fimc_lite_reqbufs,
972         .vidioc_querybuf                = vb2_ioctl_querybuf,
973         .vidioc_prepare_buf             = vb2_ioctl_prepare_buf,
974         .vidioc_create_bufs             = vb2_ioctl_create_bufs,
975         .vidioc_qbuf                    = vb2_ioctl_qbuf,
976         .vidioc_dqbuf                   = vb2_ioctl_dqbuf,
977         .vidioc_streamon                = fimc_lite_streamon,
978         .vidioc_streamoff               = fimc_lite_streamoff,
979 };
980 
981 /* Capture subdev media entity operations */
982 static int fimc_lite_link_setup(struct media_entity *entity,
983                                 const struct media_pad *local,
984                                 const struct media_pad *remote, u32 flags)
985 {
986         struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity);
987         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
988         unsigned int remote_ent_type = media_entity_type(remote->entity);
989         int ret = 0;
990 
991         if (WARN_ON(fimc == NULL))
992                 return 0;
993 
994         v4l2_dbg(1, debug, sd, "%s: %s --> %s, flags: 0x%x. source_id: 0x%x\n",
995                  __func__, remote->entity->name, local->entity->name,
996                  flags, fimc->source_subdev_grp_id);
997 
998         switch (local->index) {
999         case FLITE_SD_PAD_SINK:
1000                 if (remote_ent_type != MEDIA_ENT_T_V4L2_SUBDEV) {
1001                         ret = -EINVAL;
1002                         break;
1003                 }
1004                 if (flags & MEDIA_LNK_FL_ENABLED) {
1005                         if (fimc->source_subdev_grp_id == 0)
1006                                 fimc->source_subdev_grp_id = sd->grp_id;
1007                         else
1008                                 ret = -EBUSY;
1009                 } else {
1010                         fimc->source_subdev_grp_id = 0;
1011                         fimc->sensor = NULL;
1012                 }
1013                 break;
1014 
1015         case FLITE_SD_PAD_SOURCE_DMA:
1016                 if (!(flags & MEDIA_LNK_FL_ENABLED))
1017                         atomic_set(&fimc->out_path, FIMC_IO_NONE);
1018                 else if (remote_ent_type == MEDIA_ENT_T_DEVNODE)
1019                         atomic_set(&fimc->out_path, FIMC_IO_DMA);
1020                 else
1021                         ret = -EINVAL;
1022                 break;
1023 
1024         case FLITE_SD_PAD_SOURCE_ISP:
1025                 if (!(flags & MEDIA_LNK_FL_ENABLED))
1026                         atomic_set(&fimc->out_path, FIMC_IO_NONE);
1027                 else if (remote_ent_type == MEDIA_ENT_T_V4L2_SUBDEV)
1028                         atomic_set(&fimc->out_path, FIMC_IO_ISP);
1029                 else
1030                         ret = -EINVAL;
1031                 break;
1032 
1033         default:
1034                 v4l2_err(sd, "Invalid pad index\n");
1035                 ret = -EINVAL;
1036         }
1037         mb();
1038 
1039         return ret;
1040 }
1041 
1042 static const struct media_entity_operations fimc_lite_subdev_media_ops = {
1043         .link_setup = fimc_lite_link_setup,
1044 };
1045 
1046 static int fimc_lite_subdev_enum_mbus_code(struct v4l2_subdev *sd,
1047                                            struct v4l2_subdev_pad_config *cfg,
1048                                            struct v4l2_subdev_mbus_code_enum *code)
1049 {
1050         const struct fimc_fmt *fmt;
1051 
1052         fmt = fimc_lite_find_format(NULL, NULL, 0, code->index);
1053         if (!fmt)
1054                 return -EINVAL;
1055         code->code = fmt->mbus_code;
1056         return 0;
1057 }
1058 
1059 static struct v4l2_mbus_framefmt *__fimc_lite_subdev_get_try_fmt(
1060                 struct v4l2_subdev *sd,
1061                 struct v4l2_subdev_pad_config *cfg, unsigned int pad)
1062 {
1063         if (pad != FLITE_SD_PAD_SINK)
1064                 pad = FLITE_SD_PAD_SOURCE_DMA;
1065 
1066         return v4l2_subdev_get_try_format(sd, cfg, pad);
1067 }
1068 
1069 static int fimc_lite_subdev_get_fmt(struct v4l2_subdev *sd,
1070                                     struct v4l2_subdev_pad_config *cfg,
1071                                     struct v4l2_subdev_format *fmt)
1072 {
1073         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1074         struct v4l2_mbus_framefmt *mf = &fmt->format;
1075         struct flite_frame *f = &fimc->inp_frame;
1076 
1077         if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
1078                 mf = __fimc_lite_subdev_get_try_fmt(sd, cfg, fmt->pad);
1079                 fmt->format = *mf;
1080                 return 0;
1081         }
1082 
1083         mutex_lock(&fimc->lock);
1084         mf->colorspace = f->fmt->colorspace;
1085         mf->code = f->fmt->mbus_code;
1086 
1087         if (fmt->pad == FLITE_SD_PAD_SINK) {
1088                 /* full camera input frame size */
1089                 mf->width = f->f_width;
1090                 mf->height = f->f_height;
1091         } else {
1092                 /* crop size */
1093                 mf->width = f->rect.width;
1094                 mf->height = f->rect.height;
1095         }
1096         mutex_unlock(&fimc->lock);
1097         return 0;
1098 }
1099 
1100 static int fimc_lite_subdev_set_fmt(struct v4l2_subdev *sd,
1101                                     struct v4l2_subdev_pad_config *cfg,
1102                                     struct v4l2_subdev_format *fmt)
1103 {
1104         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1105         struct v4l2_mbus_framefmt *mf = &fmt->format;
1106         struct flite_frame *sink = &fimc->inp_frame;
1107         struct flite_frame *source = &fimc->out_frame;
1108         const struct fimc_fmt *ffmt;
1109 
1110         v4l2_dbg(1, debug, sd, "pad%d: code: 0x%x, %dx%d\n",
1111                  fmt->pad, mf->code, mf->width, mf->height);
1112 
1113         mutex_lock(&fimc->lock);
1114 
1115         if ((atomic_read(&fimc->out_path) == FIMC_IO_ISP &&
1116             sd->entity.stream_count > 0) ||
1117             (atomic_read(&fimc->out_path) == FIMC_IO_DMA &&
1118             vb2_is_busy(&fimc->vb_queue))) {
1119                 mutex_unlock(&fimc->lock);
1120                 return -EBUSY;
1121         }
1122 
1123         ffmt = fimc_lite_subdev_try_fmt(fimc, cfg, fmt);
1124 
1125         if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
1126                 struct v4l2_mbus_framefmt *src_fmt;
1127 
1128                 mf = __fimc_lite_subdev_get_try_fmt(sd, cfg, fmt->pad);
1129                 *mf = fmt->format;
1130 
1131                 if (fmt->pad == FLITE_SD_PAD_SINK) {
1132                         unsigned int pad = FLITE_SD_PAD_SOURCE_DMA;
1133                         src_fmt = __fimc_lite_subdev_get_try_fmt(sd, cfg, pad);
1134                         *src_fmt = *mf;
1135                 }
1136 
1137                 mutex_unlock(&fimc->lock);
1138                 return 0;
1139         }
1140 
1141         if (fmt->pad == FLITE_SD_PAD_SINK) {
1142                 sink->f_width = mf->width;
1143                 sink->f_height = mf->height;
1144                 sink->fmt = ffmt;
1145                 /* Set sink crop rectangle */
1146                 sink->rect.width = mf->width;
1147                 sink->rect.height = mf->height;
1148                 sink->rect.left = 0;
1149                 sink->rect.top = 0;
1150                 /* Reset source format and crop rectangle */
1151                 source->rect = sink->rect;
1152                 source->f_width = mf->width;
1153                 source->f_height = mf->height;
1154         }
1155 
1156         mutex_unlock(&fimc->lock);
1157         return 0;
1158 }
1159 
1160 static int fimc_lite_subdev_get_selection(struct v4l2_subdev *sd,
1161                                           struct v4l2_subdev_pad_config *cfg,
1162                                           struct v4l2_subdev_selection *sel)
1163 {
1164         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1165         struct flite_frame *f = &fimc->inp_frame;
1166 
1167         if ((sel->target != V4L2_SEL_TGT_CROP &&
1168              sel->target != V4L2_SEL_TGT_CROP_BOUNDS) ||
1169              sel->pad != FLITE_SD_PAD_SINK)
1170                 return -EINVAL;
1171 
1172         if (sel->which == V4L2_SUBDEV_FORMAT_TRY) {
1173                 sel->r = *v4l2_subdev_get_try_crop(sd, cfg, sel->pad);
1174                 return 0;
1175         }
1176 
1177         mutex_lock(&fimc->lock);
1178         if (sel->target == V4L2_SEL_TGT_CROP) {
1179                 sel->r = f->rect;
1180         } else {
1181                 sel->r.left = 0;
1182                 sel->r.top = 0;
1183                 sel->r.width = f->f_width;
1184                 sel->r.height = f->f_height;
1185         }
1186         mutex_unlock(&fimc->lock);
1187 
1188         v4l2_dbg(1, debug, sd, "%s: (%d,%d) %dx%d, f_w: %d, f_h: %d\n",
1189                  __func__, f->rect.left, f->rect.top, f->rect.width,
1190                  f->rect.height, f->f_width, f->f_height);
1191 
1192         return 0;
1193 }
1194 
1195 static int fimc_lite_subdev_set_selection(struct v4l2_subdev *sd,
1196                                           struct v4l2_subdev_pad_config *cfg,
1197                                           struct v4l2_subdev_selection *sel)
1198 {
1199         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1200         struct flite_frame *f = &fimc->inp_frame;
1201         int ret = 0;
1202 
1203         if (sel->target != V4L2_SEL_TGT_CROP || sel->pad != FLITE_SD_PAD_SINK)
1204                 return -EINVAL;
1205 
1206         mutex_lock(&fimc->lock);
1207         fimc_lite_try_crop(fimc, &sel->r);
1208 
1209         if (sel->which == V4L2_SUBDEV_FORMAT_TRY) {
1210                 *v4l2_subdev_get_try_crop(sd, cfg, sel->pad) = sel->r;
1211         } else {
1212                 unsigned long flags;
1213                 spin_lock_irqsave(&fimc->slock, flags);
1214                 f->rect = sel->r;
1215                 /* Same crop rectangle on the source pad */
1216                 fimc->out_frame.rect = sel->r;
1217                 set_bit(ST_FLITE_CONFIG, &fimc->state);
1218                 spin_unlock_irqrestore(&fimc->slock, flags);
1219         }
1220         mutex_unlock(&fimc->lock);
1221 
1222         v4l2_dbg(1, debug, sd, "%s: (%d,%d) %dx%d, f_w: %d, f_h: %d\n",
1223                  __func__, f->rect.left, f->rect.top, f->rect.width,
1224                  f->rect.height, f->f_width, f->f_height);
1225 
1226         return ret;
1227 }
1228 
1229 static int fimc_lite_subdev_s_stream(struct v4l2_subdev *sd, int on)
1230 {
1231         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1232         unsigned long flags;
1233         int ret;
1234 
1235         /*
1236          * Find sensor subdev linked to FIMC-LITE directly or through
1237          * MIPI-CSIS. This is required for configuration where FIMC-LITE
1238          * is used as a subdev only and feeds data internally to FIMC-IS.
1239          * The pipeline links are protected through entity.stream_count
1240          * so there is no need to take the media graph mutex here.
1241          */
1242         fimc->sensor = fimc_find_remote_sensor(&sd->entity);
1243 
1244         if (atomic_read(&fimc->out_path) != FIMC_IO_ISP)
1245                 return -ENOIOCTLCMD;
1246 
1247         mutex_lock(&fimc->lock);
1248         if (on) {
1249                 flite_hw_reset(fimc);
1250                 ret = fimc_lite_hw_init(fimc, true);
1251                 if (!ret) {
1252                         spin_lock_irqsave(&fimc->slock, flags);
1253                         flite_hw_capture_start(fimc);
1254                         spin_unlock_irqrestore(&fimc->slock, flags);
1255                 }
1256         } else {
1257                 set_bit(ST_FLITE_OFF, &fimc->state);
1258 
1259                 spin_lock_irqsave(&fimc->slock, flags);
1260                 flite_hw_capture_stop(fimc);
1261                 spin_unlock_irqrestore(&fimc->slock, flags);
1262 
1263                 ret = wait_event_timeout(fimc->irq_queue,
1264                                 !test_bit(ST_FLITE_OFF, &fimc->state),
1265                                 msecs_to_jiffies(200));
1266                 if (ret == 0)
1267                         v4l2_err(sd, "s_stream(0) timeout\n");
1268                 clear_bit(ST_FLITE_RUN, &fimc->state);
1269         }
1270 
1271         mutex_unlock(&fimc->lock);
1272         return ret;
1273 }
1274 
1275 static int fimc_lite_log_status(struct v4l2_subdev *sd)
1276 {
1277         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1278 
1279         flite_hw_dump_regs(fimc, __func__);
1280         return 0;
1281 }
1282 
1283 static int fimc_lite_subdev_registered(struct v4l2_subdev *sd)
1284 {
1285         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1286         struct vb2_queue *q = &fimc->vb_queue;
1287         struct video_device *vfd = &fimc->ve.vdev;
1288         int ret;
1289 
1290         memset(vfd, 0, sizeof(*vfd));
1291         atomic_set(&fimc->out_path, FIMC_IO_DMA);
1292 
1293         snprintf(vfd->name, sizeof(vfd->name), "fimc-lite.%d.capture",
1294                  fimc->index);
1295 
1296         vfd->fops = &fimc_lite_fops;
1297         vfd->ioctl_ops = &fimc_lite_ioctl_ops;
1298         vfd->v4l2_dev = sd->v4l2_dev;
1299         vfd->minor = -1;
1300         vfd->release = video_device_release_empty;
1301         vfd->queue = q;
1302         fimc->reqbufs_count = 0;
1303 
1304         INIT_LIST_HEAD(&fimc->pending_buf_q);
1305         INIT_LIST_HEAD(&fimc->active_buf_q);
1306 
1307         memset(q, 0, sizeof(*q));
1308         q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
1309         q->io_modes = VB2_MMAP | VB2_USERPTR;
1310         q->ops = &fimc_lite_qops;
1311         q->mem_ops = &vb2_dma_contig_memops;
1312         q->buf_struct_size = sizeof(struct flite_buffer);
1313         q->drv_priv = fimc;
1314         q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1315         q->lock = &fimc->lock;
1316 
1317         ret = vb2_queue_init(q);
1318         if (ret < 0)
1319                 return ret;
1320 
1321         fimc->vd_pad.flags = MEDIA_PAD_FL_SINK;
1322         ret = media_entity_init(&vfd->entity, 1, &fimc->vd_pad, 0);
1323         if (ret < 0)
1324                 return ret;
1325 
1326         video_set_drvdata(vfd, fimc);
1327         fimc->ve.pipe = v4l2_get_subdev_hostdata(sd);
1328 
1329         ret = video_register_device(vfd, VFL_TYPE_GRABBER, -1);
1330         if (ret < 0) {
1331                 media_entity_cleanup(&vfd->entity);
1332                 fimc->ve.pipe = NULL;
1333                 return ret;
1334         }
1335 
1336         v4l2_info(sd->v4l2_dev, "Registered %s as /dev/%s\n",
1337                   vfd->name, video_device_node_name(vfd));
1338         return 0;
1339 }
1340 
1341 static void fimc_lite_subdev_unregistered(struct v4l2_subdev *sd)
1342 {
1343         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1344 
1345         if (fimc == NULL)
1346                 return;
1347 
1348         mutex_lock(&fimc->lock);
1349 
1350         if (video_is_registered(&fimc->ve.vdev)) {
1351                 video_unregister_device(&fimc->ve.vdev);
1352                 media_entity_cleanup(&fimc->ve.vdev.entity);
1353                 fimc->ve.pipe = NULL;
1354         }
1355 
1356         mutex_unlock(&fimc->lock);
1357 }
1358 
1359 static const struct v4l2_subdev_internal_ops fimc_lite_subdev_internal_ops = {
1360         .registered = fimc_lite_subdev_registered,
1361         .unregistered = fimc_lite_subdev_unregistered,
1362 };
1363 
1364 static const struct v4l2_subdev_pad_ops fimc_lite_subdev_pad_ops = {
1365         .enum_mbus_code = fimc_lite_subdev_enum_mbus_code,
1366         .get_selection = fimc_lite_subdev_get_selection,
1367         .set_selection = fimc_lite_subdev_set_selection,
1368         .get_fmt = fimc_lite_subdev_get_fmt,
1369         .set_fmt = fimc_lite_subdev_set_fmt,
1370 };
1371 
1372 static const struct v4l2_subdev_video_ops fimc_lite_subdev_video_ops = {
1373         .s_stream = fimc_lite_subdev_s_stream,
1374 };
1375 
1376 static const struct v4l2_subdev_core_ops fimc_lite_core_ops = {
1377         .log_status = fimc_lite_log_status,
1378 };
1379 
1380 static struct v4l2_subdev_ops fimc_lite_subdev_ops = {
1381         .core = &fimc_lite_core_ops,
1382         .video = &fimc_lite_subdev_video_ops,
1383         .pad = &fimc_lite_subdev_pad_ops,
1384 };
1385 
1386 static int fimc_lite_s_ctrl(struct v4l2_ctrl *ctrl)
1387 {
1388         struct fimc_lite *fimc = container_of(ctrl->handler, struct fimc_lite,
1389                                               ctrl_handler);
1390         set_bit(ST_FLITE_CONFIG, &fimc->state);
1391         return 0;
1392 }
1393 
1394 static const struct v4l2_ctrl_ops fimc_lite_ctrl_ops = {
1395         .s_ctrl = fimc_lite_s_ctrl,
1396 };
1397 
1398 static const struct v4l2_ctrl_config fimc_lite_ctrl = {
1399         .ops    = &fimc_lite_ctrl_ops,
1400         .id     = V4L2_CTRL_CLASS_USER | 0x1001,
1401         .type   = V4L2_CTRL_TYPE_BOOLEAN,
1402         .name   = "Test Pattern 640x480",
1403         .step   = 1,
1404 };
1405 
1406 static void fimc_lite_set_default_config(struct fimc_lite *fimc)
1407 {
1408         struct flite_frame *sink = &fimc->inp_frame;
1409         struct flite_frame *source = &fimc->out_frame;
1410 
1411         sink->fmt = &fimc_lite_formats[0];
1412         sink->f_width = FLITE_DEFAULT_WIDTH;
1413         sink->f_height = FLITE_DEFAULT_HEIGHT;
1414 
1415         sink->rect.width = FLITE_DEFAULT_WIDTH;
1416         sink->rect.height = FLITE_DEFAULT_HEIGHT;
1417         sink->rect.left = 0;
1418         sink->rect.top = 0;
1419 
1420         *source = *sink;
1421 }
1422 
1423 static int fimc_lite_create_capture_subdev(struct fimc_lite *fimc)
1424 {
1425         struct v4l2_ctrl_handler *handler = &fimc->ctrl_handler;
1426         struct v4l2_subdev *sd = &fimc->subdev;
1427         int ret;
1428 
1429         v4l2_subdev_init(sd, &fimc_lite_subdev_ops);
1430         sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
1431         snprintf(sd->name, sizeof(sd->name), "FIMC-LITE.%d", fimc->index);
1432 
1433         fimc->subdev_pads[FLITE_SD_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
1434         fimc->subdev_pads[FLITE_SD_PAD_SOURCE_DMA].flags = MEDIA_PAD_FL_SOURCE;
1435         fimc->subdev_pads[FLITE_SD_PAD_SOURCE_ISP].flags = MEDIA_PAD_FL_SOURCE;
1436         ret = media_entity_init(&sd->entity, FLITE_SD_PADS_NUM,
1437                                 fimc->subdev_pads, 0);
1438         if (ret)
1439                 return ret;
1440 
1441         v4l2_ctrl_handler_init(handler, 1);
1442         fimc->test_pattern = v4l2_ctrl_new_custom(handler, &fimc_lite_ctrl,
1443                                                   NULL);
1444         if (handler->error) {
1445                 media_entity_cleanup(&sd->entity);
1446                 return handler->error;
1447         }
1448 
1449         sd->ctrl_handler = handler;
1450         sd->internal_ops = &fimc_lite_subdev_internal_ops;
1451         sd->entity.ops = &fimc_lite_subdev_media_ops;
1452         sd->owner = THIS_MODULE;
1453         v4l2_set_subdevdata(sd, fimc);
1454 
1455         return 0;
1456 }
1457 
1458 static void fimc_lite_unregister_capture_subdev(struct fimc_lite *fimc)
1459 {
1460         struct v4l2_subdev *sd = &fimc->subdev;
1461 
1462         v4l2_device_unregister_subdev(sd);
1463         media_entity_cleanup(&sd->entity);
1464         v4l2_ctrl_handler_free(&fimc->ctrl_handler);
1465         v4l2_set_subdevdata(sd, NULL);
1466 }
1467 
1468 static void fimc_lite_clk_put(struct fimc_lite *fimc)
1469 {
1470         if (IS_ERR(fimc->clock))
1471                 return;
1472 
1473         clk_unprepare(fimc->clock);
1474         clk_put(fimc->clock);
1475         fimc->clock = ERR_PTR(-EINVAL);
1476 }
1477 
1478 static int fimc_lite_clk_get(struct fimc_lite *fimc)
1479 {
1480         int ret;
1481 
1482         fimc->clock = clk_get(&fimc->pdev->dev, FLITE_CLK_NAME);
1483         if (IS_ERR(fimc->clock))
1484                 return PTR_ERR(fimc->clock);
1485 
1486         ret = clk_prepare(fimc->clock);
1487         if (ret < 0) {
1488                 clk_put(fimc->clock);
1489                 fimc->clock = ERR_PTR(-EINVAL);
1490         }
1491         return ret;
1492 }
1493 
1494 static const struct of_device_id flite_of_match[];
1495 
1496 static int fimc_lite_probe(struct platform_device *pdev)
1497 {
1498         struct flite_drvdata *drv_data = NULL;
1499         struct device *dev = &pdev->dev;
1500         const struct of_device_id *of_id;
1501         struct fimc_lite *fimc;
1502         struct resource *res;
1503         int ret;
1504 
1505         if (!dev->of_node)
1506                 return -ENODEV;
1507 
1508         fimc = devm_kzalloc(dev, sizeof(*fimc), GFP_KERNEL);
1509         if (!fimc)
1510                 return -ENOMEM;
1511 
1512         of_id = of_match_node(flite_of_match, dev->of_node);
1513         if (of_id)
1514                 drv_data = (struct flite_drvdata *)of_id->data;
1515         fimc->index = of_alias_get_id(dev->of_node, "fimc-lite");
1516 
1517         if (!drv_data || fimc->index >= drv_data->num_instances ||
1518                                                 fimc->index < 0) {
1519                 dev_err(dev, "Wrong %s node alias\n",
1520                                         dev->of_node->full_name);
1521                 return -EINVAL;
1522         }
1523 
1524         fimc->dd = drv_data;
1525         fimc->pdev = pdev;
1526 
1527         init_waitqueue_head(&fimc->irq_queue);
1528         spin_lock_init(&fimc->slock);
1529         mutex_init(&fimc->lock);
1530 
1531         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1532         fimc->regs = devm_ioremap_resource(dev, res);
1533         if (IS_ERR(fimc->regs))
1534                 return PTR_ERR(fimc->regs);
1535 
1536         res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1537         if (res == NULL) {
1538                 dev_err(dev, "Failed to get IRQ resource\n");
1539                 return -ENXIO;
1540         }
1541 
1542         ret = fimc_lite_clk_get(fimc);
1543         if (ret)
1544                 return ret;
1545 
1546         ret = devm_request_irq(dev, res->start, flite_irq_handler,
1547                                0, dev_name(dev), fimc);
1548         if (ret) {
1549                 dev_err(dev, "Failed to install irq (%d)\n", ret);
1550                 goto err_clk_put;
1551         }
1552 
1553         /* The video node will be created within the subdev's registered() op */
1554         ret = fimc_lite_create_capture_subdev(fimc);
1555         if (ret)
1556                 goto err_clk_put;
1557 
1558         platform_set_drvdata(pdev, fimc);
1559         pm_runtime_enable(dev);
1560 
1561         if (!pm_runtime_enabled(dev)) {
1562                 ret = clk_enable(fimc->clock);
1563                 if (ret < 0)
1564                         goto err_sd;
1565         }
1566 
1567         fimc->alloc_ctx = vb2_dma_contig_init_ctx(dev);
1568         if (IS_ERR(fimc->alloc_ctx)) {
1569                 ret = PTR_ERR(fimc->alloc_ctx);
1570                 goto err_clk_dis;
1571         }
1572 
1573         fimc_lite_set_default_config(fimc);
1574 
1575         dev_dbg(dev, "FIMC-LITE.%d registered successfully\n",
1576                 fimc->index);
1577         return 0;
1578 
1579 err_clk_dis:
1580         if (!pm_runtime_enabled(dev))
1581                 clk_disable(fimc->clock);
1582 err_sd:
1583         fimc_lite_unregister_capture_subdev(fimc);
1584 err_clk_put:
1585         fimc_lite_clk_put(fimc);
1586         return ret;
1587 }
1588 
1589 #ifdef CONFIG_PM
1590 static int fimc_lite_runtime_resume(struct device *dev)
1591 {
1592         struct fimc_lite *fimc = dev_get_drvdata(dev);
1593 
1594         clk_enable(fimc->clock);
1595         return 0;
1596 }
1597 
1598 static int fimc_lite_runtime_suspend(struct device *dev)
1599 {
1600         struct fimc_lite *fimc = dev_get_drvdata(dev);
1601 
1602         clk_disable(fimc->clock);
1603         return 0;
1604 }
1605 #endif
1606 
1607 #ifdef CONFIG_PM_SLEEP
1608 static int fimc_lite_resume(struct device *dev)
1609 {
1610         struct fimc_lite *fimc = dev_get_drvdata(dev);
1611         struct flite_buffer *buf;
1612         unsigned long flags;
1613         int i;
1614 
1615         spin_lock_irqsave(&fimc->slock, flags);
1616         if (!test_and_clear_bit(ST_LPM, &fimc->state) ||
1617             !test_bit(ST_FLITE_IN_USE, &fimc->state)) {
1618                 spin_unlock_irqrestore(&fimc->slock, flags);
1619                 return 0;
1620         }
1621         flite_hw_reset(fimc);
1622         spin_unlock_irqrestore(&fimc->slock, flags);
1623 
1624         if (!test_and_clear_bit(ST_FLITE_SUSPENDED, &fimc->state))
1625                 return 0;
1626 
1627         INIT_LIST_HEAD(&fimc->active_buf_q);
1628         fimc_pipeline_call(&fimc->ve, open,
1629                            &fimc->ve.vdev.entity, false);
1630         fimc_lite_hw_init(fimc, atomic_read(&fimc->out_path) == FIMC_IO_ISP);
1631         clear_bit(ST_FLITE_SUSPENDED, &fimc->state);
1632 
1633         for (i = 0; i < fimc->reqbufs_count; i++) {
1634                 if (list_empty(&fimc->pending_buf_q))
1635                         break;
1636                 buf = fimc_lite_pending_queue_pop(fimc);
1637                 buffer_queue(&buf->vb.vb2_buf);
1638         }
1639         return 0;
1640 }
1641 
1642 static int fimc_lite_suspend(struct device *dev)
1643 {
1644         struct fimc_lite *fimc = dev_get_drvdata(dev);
1645         bool suspend = test_bit(ST_FLITE_IN_USE, &fimc->state);
1646         int ret;
1647 
1648         if (test_and_set_bit(ST_LPM, &fimc->state))
1649                 return 0;
1650 
1651         ret = fimc_lite_stop_capture(fimc, suspend);
1652         if (ret < 0 || !fimc_lite_active(fimc))
1653                 return ret;
1654 
1655         return fimc_pipeline_call(&fimc->ve, close);
1656 }
1657 #endif /* CONFIG_PM_SLEEP */
1658 
1659 static int fimc_lite_remove(struct platform_device *pdev)
1660 {
1661         struct fimc_lite *fimc = platform_get_drvdata(pdev);
1662         struct device *dev = &pdev->dev;
1663 
1664         pm_runtime_disable(dev);
1665         pm_runtime_set_suspended(dev);
1666         fimc_lite_unregister_capture_subdev(fimc);
1667         vb2_dma_contig_cleanup_ctx(fimc->alloc_ctx);
1668         fimc_lite_clk_put(fimc);
1669 
1670         dev_info(dev, "Driver unloaded\n");
1671         return 0;
1672 }
1673 
1674 static const struct dev_pm_ops fimc_lite_pm_ops = {
1675         SET_SYSTEM_SLEEP_PM_OPS(fimc_lite_suspend, fimc_lite_resume)
1676         SET_RUNTIME_PM_OPS(fimc_lite_runtime_suspend, fimc_lite_runtime_resume,
1677                            NULL)
1678 };
1679 
1680 /* EXYNOS4212, EXYNOS4412 */
1681 static struct flite_drvdata fimc_lite_drvdata_exynos4 = {
1682         .max_width              = 8192,
1683         .max_height             = 8192,
1684         .out_width_align        = 8,
1685         .win_hor_offs_align     = 2,
1686         .out_hor_offs_align     = 8,
1687         .max_dma_bufs           = 1,
1688         .num_instances          = 2,
1689 };
1690 
1691 /* EXYNOS5250 */
1692 static struct flite_drvdata fimc_lite_drvdata_exynos5 = {
1693         .max_width              = 8192,
1694         .max_height             = 8192,
1695         .out_width_align        = 8,
1696         .win_hor_offs_align     = 2,
1697         .out_hor_offs_align     = 8,
1698         .max_dma_bufs           = 32,
1699         .num_instances          = 3,
1700 };
1701 
1702 static const struct of_device_id flite_of_match[] = {
1703         {
1704                 .compatible = "samsung,exynos4212-fimc-lite",
1705                 .data = &fimc_lite_drvdata_exynos4,
1706         },
1707         {
1708                 .compatible = "samsung,exynos5250-fimc-lite",
1709                 .data = &fimc_lite_drvdata_exynos5,
1710         },
1711         { /* sentinel */ },
1712 };
1713 MODULE_DEVICE_TABLE(of, flite_of_match);
1714 
1715 static struct platform_driver fimc_lite_driver = {
1716         .probe          = fimc_lite_probe,
1717         .remove         = fimc_lite_remove,
1718         .driver = {
1719                 .of_match_table = flite_of_match,
1720                 .name           = FIMC_LITE_DRV_NAME,
1721                 .pm             = &fimc_lite_pm_ops,
1722         }
1723 };
1724 module_platform_driver(fimc_lite_driver);
1725 MODULE_LICENSE("GPL");
1726 MODULE_ALIAS("platform:" FIMC_LITE_DRV_NAME);
1727 

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