Version:  2.0.40 2.2.26 2.4.37 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 4.5 4.6 4.7

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/drv-intf/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                 vbuf->vb.vb2_buf.timestamp = ktime_get_ns();
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,
359                        unsigned int *num_buffers, unsigned int *num_planes,
360                        unsigned int sizes[], void *allocators[])
361 {
362         struct fimc_lite *fimc = vq->drv_priv;
363         struct flite_frame *frame = &fimc->out_frame;
364         const struct fimc_fmt *fmt = frame->fmt;
365         unsigned long wh = frame->f_width * frame->f_height;
366         int i;
367 
368         if (fmt == NULL)
369                 return -EINVAL;
370 
371         if (*num_planes) {
372                 if (*num_planes != fmt->memplanes)
373                         return -EINVAL;
374                 for (i = 0; i < *num_planes; i++) {
375                         if (sizes[i] < (wh * fmt->depth[i]) / 8)
376                                 return -EINVAL;
377                         allocators[i] = fimc->alloc_ctx;
378                 }
379                 return 0;
380         }
381 
382         *num_planes = fmt->memplanes;
383 
384         for (i = 0; i < fmt->memplanes; i++) {
385                 sizes[i] = (wh * fmt->depth[i]) / 8;
386                 allocators[i] = fimc->alloc_ctx;
387         }
388 
389         return 0;
390 }
391 
392 static int buffer_prepare(struct vb2_buffer *vb)
393 {
394         struct vb2_queue *vq = vb->vb2_queue;
395         struct fimc_lite *fimc = vq->drv_priv;
396         int i;
397 
398         if (fimc->out_frame.fmt == NULL)
399                 return -EINVAL;
400 
401         for (i = 0; i < fimc->out_frame.fmt->memplanes; i++) {
402                 unsigned long size = fimc->payload[i];
403 
404                 if (vb2_plane_size(vb, i) < size) {
405                         v4l2_err(&fimc->ve.vdev,
406                                  "User buffer too small (%ld < %ld)\n",
407                                  vb2_plane_size(vb, i), size);
408                         return -EINVAL;
409                 }
410                 vb2_set_plane_payload(vb, i, size);
411         }
412 
413         return 0;
414 }
415 
416 static void buffer_queue(struct vb2_buffer *vb)
417 {
418         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
419         struct flite_buffer *buf
420                 = container_of(vbuf, struct flite_buffer, vb);
421         struct fimc_lite *fimc = vb2_get_drv_priv(vb->vb2_queue);
422         unsigned long flags;
423 
424         spin_lock_irqsave(&fimc->slock, flags);
425         buf->paddr = vb2_dma_contig_plane_dma_addr(vb, 0);
426 
427         buf->index = fimc->buf_index++;
428         if (fimc->buf_index >= fimc->reqbufs_count)
429                 fimc->buf_index = 0;
430 
431         if (!test_bit(ST_FLITE_SUSPENDED, &fimc->state) &&
432             !test_bit(ST_FLITE_STREAM, &fimc->state) &&
433             list_empty(&fimc->active_buf_q)) {
434                 flite_hw_set_dma_buffer(fimc, buf);
435                 fimc_lite_active_queue_add(fimc, buf);
436         } else {
437                 fimc_lite_pending_queue_add(fimc, buf);
438         }
439 
440         if (vb2_is_streaming(&fimc->vb_queue) &&
441             !list_empty(&fimc->pending_buf_q) &&
442             !test_and_set_bit(ST_FLITE_STREAM, &fimc->state)) {
443                 flite_hw_capture_start(fimc);
444                 spin_unlock_irqrestore(&fimc->slock, flags);
445 
446                 if (!test_and_set_bit(ST_SENSOR_STREAM, &fimc->state))
447                         fimc_pipeline_call(&fimc->ve, set_stream, 1);
448                 return;
449         }
450         spin_unlock_irqrestore(&fimc->slock, flags);
451 }
452 
453 static const struct vb2_ops fimc_lite_qops = {
454         .queue_setup     = queue_setup,
455         .buf_prepare     = buffer_prepare,
456         .buf_queue       = buffer_queue,
457         .wait_prepare    = vb2_ops_wait_prepare,
458         .wait_finish     = vb2_ops_wait_finish,
459         .start_streaming = start_streaming,
460         .stop_streaming  = stop_streaming,
461 };
462 
463 static void fimc_lite_clear_event_counters(struct fimc_lite *fimc)
464 {
465         unsigned long flags;
466 
467         spin_lock_irqsave(&fimc->slock, flags);
468         memset(&fimc->events, 0, sizeof(fimc->events));
469         spin_unlock_irqrestore(&fimc->slock, flags);
470 }
471 
472 static int fimc_lite_open(struct file *file)
473 {
474         struct fimc_lite *fimc = video_drvdata(file);
475         struct media_entity *me = &fimc->ve.vdev.entity;
476         int ret;
477 
478         mutex_lock(&fimc->lock);
479         if (atomic_read(&fimc->out_path) != FIMC_IO_DMA) {
480                 ret = -EBUSY;
481                 goto unlock;
482         }
483 
484         set_bit(ST_FLITE_IN_USE, &fimc->state);
485         ret = pm_runtime_get_sync(&fimc->pdev->dev);
486         if (ret < 0)
487                 goto unlock;
488 
489         ret = v4l2_fh_open(file);
490         if (ret < 0)
491                 goto err_pm;
492 
493         if (!v4l2_fh_is_singular_file(file) ||
494             atomic_read(&fimc->out_path) != FIMC_IO_DMA)
495                 goto unlock;
496 
497         mutex_lock(&me->graph_obj.mdev->graph_mutex);
498 
499         ret = fimc_pipeline_call(&fimc->ve, open, me, true);
500 
501         /* Mark video pipeline ending at this video node as in use. */
502         if (ret == 0)
503                 me->use_count++;
504 
505         mutex_unlock(&me->graph_obj.mdev->graph_mutex);
506 
507         if (!ret) {
508                 fimc_lite_clear_event_counters(fimc);
509                 goto unlock;
510         }
511 
512         v4l2_fh_release(file);
513 err_pm:
514         pm_runtime_put_sync(&fimc->pdev->dev);
515         clear_bit(ST_FLITE_IN_USE, &fimc->state);
516 unlock:
517         mutex_unlock(&fimc->lock);
518         return ret;
519 }
520 
521 static int fimc_lite_release(struct file *file)
522 {
523         struct fimc_lite *fimc = video_drvdata(file);
524         struct media_entity *entity = &fimc->ve.vdev.entity;
525 
526         mutex_lock(&fimc->lock);
527 
528         if (v4l2_fh_is_singular_file(file) &&
529             atomic_read(&fimc->out_path) == FIMC_IO_DMA) {
530                 if (fimc->streaming) {
531                         media_entity_pipeline_stop(entity);
532                         fimc->streaming = false;
533                 }
534                 fimc_lite_stop_capture(fimc, false);
535                 fimc_pipeline_call(&fimc->ve, close);
536                 clear_bit(ST_FLITE_IN_USE, &fimc->state);
537 
538                 mutex_lock(&entity->graph_obj.mdev->graph_mutex);
539                 entity->use_count--;
540                 mutex_unlock(&entity->graph_obj.mdev->graph_mutex);
541         }
542 
543         _vb2_fop_release(file, NULL);
544         pm_runtime_put(&fimc->pdev->dev);
545         clear_bit(ST_FLITE_SUSPENDED, &fimc->state);
546 
547         mutex_unlock(&fimc->lock);
548         return 0;
549 }
550 
551 static const struct v4l2_file_operations fimc_lite_fops = {
552         .owner          = THIS_MODULE,
553         .open           = fimc_lite_open,
554         .release        = fimc_lite_release,
555         .poll           = vb2_fop_poll,
556         .unlocked_ioctl = video_ioctl2,
557         .mmap           = vb2_fop_mmap,
558 };
559 
560 /*
561  * Format and crop negotiation helpers
562  */
563 
564 static const struct fimc_fmt *fimc_lite_subdev_try_fmt(struct fimc_lite *fimc,
565                                         struct v4l2_subdev_pad_config *cfg,
566                                         struct v4l2_subdev_format *format)
567 {
568         struct flite_drvdata *dd = fimc->dd;
569         struct v4l2_mbus_framefmt *mf = &format->format;
570         const struct fimc_fmt *fmt = NULL;
571 
572         if (format->pad == FLITE_SD_PAD_SINK) {
573                 v4l_bound_align_image(&mf->width, 8, dd->max_width,
574                                 ffs(dd->out_width_align) - 1,
575                                 &mf->height, 0, dd->max_height, 0, 0);
576 
577                 fmt = fimc_lite_find_format(NULL, &mf->code, 0, 0);
578                 if (WARN_ON(!fmt))
579                         return NULL;
580 
581                 mf->colorspace = fmt->colorspace;
582                 mf->code = fmt->mbus_code;
583         } else {
584                 struct flite_frame *sink = &fimc->inp_frame;
585                 struct v4l2_mbus_framefmt *sink_fmt;
586                 struct v4l2_rect *rect;
587 
588                 if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
589                         sink_fmt = v4l2_subdev_get_try_format(&fimc->subdev, cfg,
590                                                 FLITE_SD_PAD_SINK);
591 
592                         mf->code = sink_fmt->code;
593                         mf->colorspace = sink_fmt->colorspace;
594 
595                         rect = v4l2_subdev_get_try_crop(&fimc->subdev, cfg,
596                                                 FLITE_SD_PAD_SINK);
597                 } else {
598                         mf->code = sink->fmt->mbus_code;
599                         mf->colorspace = sink->fmt->colorspace;
600                         rect = &sink->rect;
601                 }
602 
603                 /* Allow changing format only on sink pad */
604                 mf->width = rect->width;
605                 mf->height = rect->height;
606         }
607 
608         mf->field = V4L2_FIELD_NONE;
609 
610         v4l2_dbg(1, debug, &fimc->subdev, "code: %#x (%d), %dx%d\n",
611                  mf->code, mf->colorspace, mf->width, mf->height);
612 
613         return fmt;
614 }
615 
616 static void fimc_lite_try_crop(struct fimc_lite *fimc, struct v4l2_rect *r)
617 {
618         struct flite_frame *frame = &fimc->inp_frame;
619 
620         v4l_bound_align_image(&r->width, 0, frame->f_width, 0,
621                               &r->height, 0, frame->f_height, 0, 0);
622 
623         /* Adjust left/top if cropping rectangle got out of bounds */
624         r->left = clamp_t(u32, r->left, 0, frame->f_width - r->width);
625         r->left = round_down(r->left, fimc->dd->win_hor_offs_align);
626         r->top  = clamp_t(u32, r->top, 0, frame->f_height - r->height);
627 
628         v4l2_dbg(1, debug, &fimc->subdev, "(%d,%d)/%dx%d, sink fmt: %dx%d\n",
629                  r->left, r->top, r->width, r->height,
630                  frame->f_width, frame->f_height);
631 }
632 
633 static void fimc_lite_try_compose(struct fimc_lite *fimc, struct v4l2_rect *r)
634 {
635         struct flite_frame *frame = &fimc->out_frame;
636         struct v4l2_rect *crop_rect = &fimc->inp_frame.rect;
637 
638         /* Scaling is not supported so we enforce compose rectangle size
639            same as size of the sink crop rectangle. */
640         r->width = crop_rect->width;
641         r->height = crop_rect->height;
642 
643         /* Adjust left/top if the composing rectangle got out of bounds */
644         r->left = clamp_t(u32, r->left, 0, frame->f_width - r->width);
645         r->left = round_down(r->left, fimc->dd->out_hor_offs_align);
646         r->top  = clamp_t(u32, r->top, 0, fimc->out_frame.f_height - r->height);
647 
648         v4l2_dbg(1, debug, &fimc->subdev, "(%d,%d)/%dx%d, source fmt: %dx%d\n",
649                  r->left, r->top, r->width, r->height,
650                  frame->f_width, frame->f_height);
651 }
652 
653 /*
654  * Video node ioctl operations
655  */
656 static int fimc_lite_querycap(struct file *file, void *priv,
657                                         struct v4l2_capability *cap)
658 {
659         struct fimc_lite *fimc = video_drvdata(file);
660 
661         strlcpy(cap->driver, FIMC_LITE_DRV_NAME, sizeof(cap->driver));
662         strlcpy(cap->card, FIMC_LITE_DRV_NAME, sizeof(cap->card));
663         snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
664                                         dev_name(&fimc->pdev->dev));
665 
666         cap->device_caps = V4L2_CAP_STREAMING;
667         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
668         return 0;
669 }
670 
671 static int fimc_lite_enum_fmt_mplane(struct file *file, void *priv,
672                                      struct v4l2_fmtdesc *f)
673 {
674         const struct fimc_fmt *fmt;
675 
676         if (f->index >= ARRAY_SIZE(fimc_lite_formats))
677                 return -EINVAL;
678 
679         fmt = &fimc_lite_formats[f->index];
680         strlcpy(f->description, fmt->name, sizeof(f->description));
681         f->pixelformat = fmt->fourcc;
682 
683         return 0;
684 }
685 
686 static int fimc_lite_g_fmt_mplane(struct file *file, void *fh,
687                                   struct v4l2_format *f)
688 {
689         struct fimc_lite *fimc = video_drvdata(file);
690         struct v4l2_pix_format_mplane *pixm = &f->fmt.pix_mp;
691         struct v4l2_plane_pix_format *plane_fmt = &pixm->plane_fmt[0];
692         struct flite_frame *frame = &fimc->out_frame;
693         const struct fimc_fmt *fmt = frame->fmt;
694 
695         plane_fmt->bytesperline = (frame->f_width * fmt->depth[0]) / 8;
696         plane_fmt->sizeimage = plane_fmt->bytesperline * frame->f_height;
697 
698         pixm->num_planes = fmt->memplanes;
699         pixm->pixelformat = fmt->fourcc;
700         pixm->width = frame->f_width;
701         pixm->height = frame->f_height;
702         pixm->field = V4L2_FIELD_NONE;
703         pixm->colorspace = fmt->colorspace;
704         return 0;
705 }
706 
707 static int fimc_lite_try_fmt(struct fimc_lite *fimc,
708                              struct v4l2_pix_format_mplane *pixm,
709                              const struct fimc_fmt **ffmt)
710 {
711         u32 bpl = pixm->plane_fmt[0].bytesperline;
712         struct flite_drvdata *dd = fimc->dd;
713         const struct fimc_fmt *inp_fmt = fimc->inp_frame.fmt;
714         const struct fimc_fmt *fmt;
715 
716         if (WARN_ON(inp_fmt == NULL))
717                 return -EINVAL;
718         /*
719          * We allow some flexibility only for YUV formats. In case of raw
720          * raw Bayer the FIMC-LITE's output format must match its camera
721          * interface input format.
722          */
723         if (inp_fmt->flags & FMT_FLAGS_YUV)
724                 fmt = fimc_lite_find_format(&pixm->pixelformat, NULL,
725                                                 inp_fmt->flags, 0);
726         else
727                 fmt = inp_fmt;
728 
729         if (WARN_ON(fmt == NULL))
730                 return -EINVAL;
731         if (ffmt)
732                 *ffmt = fmt;
733         v4l_bound_align_image(&pixm->width, 8, dd->max_width,
734                               ffs(dd->out_width_align) - 1,
735                               &pixm->height, 0, dd->max_height, 0, 0);
736 
737         if ((bpl == 0 || ((bpl * 8) / fmt->depth[0]) < pixm->width))
738                 pixm->plane_fmt[0].bytesperline = (pixm->width *
739                                                    fmt->depth[0]) / 8;
740 
741         if (pixm->plane_fmt[0].sizeimage == 0)
742                 pixm->plane_fmt[0].sizeimage = (pixm->width * pixm->height *
743                                                 fmt->depth[0]) / 8;
744         pixm->num_planes = fmt->memplanes;
745         pixm->pixelformat = fmt->fourcc;
746         pixm->colorspace = fmt->colorspace;
747         pixm->field = V4L2_FIELD_NONE;
748         return 0;
749 }
750 
751 static int fimc_lite_try_fmt_mplane(struct file *file, void *fh,
752                                     struct v4l2_format *f)
753 {
754         struct fimc_lite *fimc = video_drvdata(file);
755         return fimc_lite_try_fmt(fimc, &f->fmt.pix_mp, NULL);
756 }
757 
758 static int fimc_lite_s_fmt_mplane(struct file *file, void *priv,
759                                   struct v4l2_format *f)
760 {
761         struct v4l2_pix_format_mplane *pixm = &f->fmt.pix_mp;
762         struct fimc_lite *fimc = video_drvdata(file);
763         struct flite_frame *frame = &fimc->out_frame;
764         const struct fimc_fmt *fmt = NULL;
765         int ret;
766 
767         if (vb2_is_busy(&fimc->vb_queue))
768                 return -EBUSY;
769 
770         ret = fimc_lite_try_fmt(fimc, &f->fmt.pix_mp, &fmt);
771         if (ret < 0)
772                 return ret;
773 
774         frame->fmt = fmt;
775         fimc->payload[0] = max((pixm->width * pixm->height * fmt->depth[0]) / 8,
776                                pixm->plane_fmt[0].sizeimage);
777         frame->f_width = pixm->width;
778         frame->f_height = pixm->height;
779 
780         return 0;
781 }
782 
783 static int fimc_pipeline_validate(struct fimc_lite *fimc)
784 {
785         struct v4l2_subdev *sd = &fimc->subdev;
786         struct v4l2_subdev_format sink_fmt, src_fmt;
787         struct media_pad *pad;
788         int ret;
789 
790         while (1) {
791                 /* Retrieve format at the sink pad */
792                 pad = &sd->entity.pads[0];
793                 if (!(pad->flags & MEDIA_PAD_FL_SINK))
794                         break;
795                 /* Don't call FIMC subdev operation to avoid nested locking */
796                 if (sd == &fimc->subdev) {
797                         struct flite_frame *ff = &fimc->out_frame;
798                         sink_fmt.format.width = ff->f_width;
799                         sink_fmt.format.height = ff->f_height;
800                         sink_fmt.format.code = fimc->inp_frame.fmt->mbus_code;
801                 } else {
802                         sink_fmt.pad = pad->index;
803                         sink_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
804                         ret = v4l2_subdev_call(sd, pad, get_fmt, NULL,
805                                                &sink_fmt);
806                         if (ret < 0 && ret != -ENOIOCTLCMD)
807                                 return -EPIPE;
808                 }
809                 /* Retrieve format at the source pad */
810                 pad = media_entity_remote_pad(pad);
811                 if (!pad || !is_media_entity_v4l2_subdev(pad->entity))
812                         break;
813 
814                 sd = media_entity_to_v4l2_subdev(pad->entity);
815                 src_fmt.pad = pad->index;
816                 src_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
817                 ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &src_fmt);
818                 if (ret < 0 && ret != -ENOIOCTLCMD)
819                         return -EPIPE;
820 
821                 if (src_fmt.format.width != sink_fmt.format.width ||
822                     src_fmt.format.height != sink_fmt.format.height ||
823                     src_fmt.format.code != sink_fmt.format.code)
824                         return -EPIPE;
825         }
826         return 0;
827 }
828 
829 static int fimc_lite_streamon(struct file *file, void *priv,
830                               enum v4l2_buf_type type)
831 {
832         struct fimc_lite *fimc = video_drvdata(file);
833         struct media_entity *entity = &fimc->ve.vdev.entity;
834         int ret;
835 
836         if (fimc_lite_active(fimc))
837                 return -EBUSY;
838 
839         ret = media_entity_pipeline_start(entity, &fimc->ve.pipe->mp);
840         if (ret < 0)
841                 return ret;
842 
843         ret = fimc_pipeline_validate(fimc);
844         if (ret < 0)
845                 goto err_p_stop;
846 
847         fimc->sensor = fimc_find_remote_sensor(&fimc->subdev.entity);
848 
849         ret = vb2_ioctl_streamon(file, priv, type);
850         if (!ret) {
851                 fimc->streaming = true;
852                 return ret;
853         }
854 
855 err_p_stop:
856         media_entity_pipeline_stop(entity);
857         return 0;
858 }
859 
860 static int fimc_lite_streamoff(struct file *file, void *priv,
861                                enum v4l2_buf_type type)
862 {
863         struct fimc_lite *fimc = video_drvdata(file);
864         int ret;
865 
866         ret = vb2_ioctl_streamoff(file, priv, type);
867         if (ret < 0)
868                 return ret;
869 
870         media_entity_pipeline_stop(&fimc->ve.vdev.entity);
871         fimc->streaming = false;
872         return 0;
873 }
874 
875 static int fimc_lite_reqbufs(struct file *file, void *priv,
876                              struct v4l2_requestbuffers *reqbufs)
877 {
878         struct fimc_lite *fimc = video_drvdata(file);
879         int ret;
880 
881         reqbufs->count = max_t(u32, FLITE_REQ_BUFS_MIN, reqbufs->count);
882         ret = vb2_ioctl_reqbufs(file, priv, reqbufs);
883         if (!ret)
884                 fimc->reqbufs_count = reqbufs->count;
885 
886         return ret;
887 }
888 
889 /* Return 1 if rectangle a is enclosed in rectangle b, or 0 otherwise. */
890 static int enclosed_rectangle(struct v4l2_rect *a, struct v4l2_rect *b)
891 {
892         if (a->left < b->left || a->top < b->top)
893                 return 0;
894         if (a->left + a->width > b->left + b->width)
895                 return 0;
896         if (a->top + a->height > b->top + b->height)
897                 return 0;
898 
899         return 1;
900 }
901 
902 static int fimc_lite_g_selection(struct file *file, void *fh,
903                                  struct v4l2_selection *sel)
904 {
905         struct fimc_lite *fimc = video_drvdata(file);
906         struct flite_frame *f = &fimc->out_frame;
907 
908         if (sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
909                 return -EINVAL;
910 
911         switch (sel->target) {
912         case V4L2_SEL_TGT_COMPOSE_BOUNDS:
913         case V4L2_SEL_TGT_COMPOSE_DEFAULT:
914                 sel->r.left = 0;
915                 sel->r.top = 0;
916                 sel->r.width = f->f_width;
917                 sel->r.height = f->f_height;
918                 return 0;
919 
920         case V4L2_SEL_TGT_COMPOSE:
921                 sel->r = f->rect;
922                 return 0;
923         }
924 
925         return -EINVAL;
926 }
927 
928 static int fimc_lite_s_selection(struct file *file, void *fh,
929                                  struct v4l2_selection *sel)
930 {
931         struct fimc_lite *fimc = video_drvdata(file);
932         struct flite_frame *f = &fimc->out_frame;
933         struct v4l2_rect rect = sel->r;
934         unsigned long flags;
935 
936         if (sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE ||
937             sel->target != V4L2_SEL_TGT_COMPOSE)
938                 return -EINVAL;
939 
940         fimc_lite_try_compose(fimc, &rect);
941 
942         if ((sel->flags & V4L2_SEL_FLAG_LE) &&
943             !enclosed_rectangle(&rect, &sel->r))
944                 return -ERANGE;
945 
946         if ((sel->flags & V4L2_SEL_FLAG_GE) &&
947             !enclosed_rectangle(&sel->r, &rect))
948                 return -ERANGE;
949 
950         sel->r = rect;
951         spin_lock_irqsave(&fimc->slock, flags);
952         f->rect = rect;
953         set_bit(ST_FLITE_CONFIG, &fimc->state);
954         spin_unlock_irqrestore(&fimc->slock, flags);
955 
956         return 0;
957 }
958 
959 static const struct v4l2_ioctl_ops fimc_lite_ioctl_ops = {
960         .vidioc_querycap                = fimc_lite_querycap,
961         .vidioc_enum_fmt_vid_cap_mplane = fimc_lite_enum_fmt_mplane,
962         .vidioc_try_fmt_vid_cap_mplane  = fimc_lite_try_fmt_mplane,
963         .vidioc_s_fmt_vid_cap_mplane    = fimc_lite_s_fmt_mplane,
964         .vidioc_g_fmt_vid_cap_mplane    = fimc_lite_g_fmt_mplane,
965         .vidioc_g_selection             = fimc_lite_g_selection,
966         .vidioc_s_selection             = fimc_lite_s_selection,
967         .vidioc_reqbufs                 = fimc_lite_reqbufs,
968         .vidioc_querybuf                = vb2_ioctl_querybuf,
969         .vidioc_prepare_buf             = vb2_ioctl_prepare_buf,
970         .vidioc_create_bufs             = vb2_ioctl_create_bufs,
971         .vidioc_qbuf                    = vb2_ioctl_qbuf,
972         .vidioc_dqbuf                   = vb2_ioctl_dqbuf,
973         .vidioc_streamon                = fimc_lite_streamon,
974         .vidioc_streamoff               = fimc_lite_streamoff,
975 };
976 
977 /* Capture subdev media entity operations */
978 static int fimc_lite_link_setup(struct media_entity *entity,
979                                 const struct media_pad *local,
980                                 const struct media_pad *remote, u32 flags)
981 {
982         struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity);
983         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
984         int ret = 0;
985 
986         if (WARN_ON(fimc == NULL))
987                 return 0;
988 
989         v4l2_dbg(1, debug, sd, "%s: %s --> %s, flags: 0x%x. source_id: 0x%x\n",
990                  __func__, remote->entity->name, local->entity->name,
991                  flags, fimc->source_subdev_grp_id);
992 
993         switch (local->index) {
994         case FLITE_SD_PAD_SINK:
995                 if (flags & MEDIA_LNK_FL_ENABLED) {
996                         if (fimc->source_subdev_grp_id == 0)
997                                 fimc->source_subdev_grp_id = sd->grp_id;
998                         else
999                                 ret = -EBUSY;
1000                 } else {
1001                         fimc->source_subdev_grp_id = 0;
1002                         fimc->sensor = NULL;
1003                 }
1004                 break;
1005 
1006         case FLITE_SD_PAD_SOURCE_DMA:
1007                 if (!(flags & MEDIA_LNK_FL_ENABLED))
1008                         atomic_set(&fimc->out_path, FIMC_IO_NONE);
1009                 else
1010                         atomic_set(&fimc->out_path, FIMC_IO_DMA);
1011                 break;
1012 
1013         case FLITE_SD_PAD_SOURCE_ISP:
1014                 if (!(flags & MEDIA_LNK_FL_ENABLED))
1015                         atomic_set(&fimc->out_path, FIMC_IO_NONE);
1016                 else
1017                         atomic_set(&fimc->out_path, FIMC_IO_ISP);
1018                 break;
1019 
1020         default:
1021                 v4l2_err(sd, "Invalid pad index\n");
1022                 ret = -EINVAL;
1023         }
1024         mb();
1025 
1026         return ret;
1027 }
1028 
1029 static const struct media_entity_operations fimc_lite_subdev_media_ops = {
1030         .link_setup = fimc_lite_link_setup,
1031 };
1032 
1033 static int fimc_lite_subdev_enum_mbus_code(struct v4l2_subdev *sd,
1034                                            struct v4l2_subdev_pad_config *cfg,
1035                                            struct v4l2_subdev_mbus_code_enum *code)
1036 {
1037         const struct fimc_fmt *fmt;
1038 
1039         fmt = fimc_lite_find_format(NULL, NULL, 0, code->index);
1040         if (!fmt)
1041                 return -EINVAL;
1042         code->code = fmt->mbus_code;
1043         return 0;
1044 }
1045 
1046 static struct v4l2_mbus_framefmt *__fimc_lite_subdev_get_try_fmt(
1047                 struct v4l2_subdev *sd,
1048                 struct v4l2_subdev_pad_config *cfg, unsigned int pad)
1049 {
1050         if (pad != FLITE_SD_PAD_SINK)
1051                 pad = FLITE_SD_PAD_SOURCE_DMA;
1052 
1053         return v4l2_subdev_get_try_format(sd, cfg, pad);
1054 }
1055 
1056 static int fimc_lite_subdev_get_fmt(struct v4l2_subdev *sd,
1057                                     struct v4l2_subdev_pad_config *cfg,
1058                                     struct v4l2_subdev_format *fmt)
1059 {
1060         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1061         struct v4l2_mbus_framefmt *mf = &fmt->format;
1062         struct flite_frame *f = &fimc->inp_frame;
1063 
1064         if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
1065                 mf = __fimc_lite_subdev_get_try_fmt(sd, cfg, fmt->pad);
1066                 fmt->format = *mf;
1067                 return 0;
1068         }
1069 
1070         mutex_lock(&fimc->lock);
1071         mf->colorspace = f->fmt->colorspace;
1072         mf->code = f->fmt->mbus_code;
1073 
1074         if (fmt->pad == FLITE_SD_PAD_SINK) {
1075                 /* full camera input frame size */
1076                 mf->width = f->f_width;
1077                 mf->height = f->f_height;
1078         } else {
1079                 /* crop size */
1080                 mf->width = f->rect.width;
1081                 mf->height = f->rect.height;
1082         }
1083         mutex_unlock(&fimc->lock);
1084         return 0;
1085 }
1086 
1087 static int fimc_lite_subdev_set_fmt(struct v4l2_subdev *sd,
1088                                     struct v4l2_subdev_pad_config *cfg,
1089                                     struct v4l2_subdev_format *fmt)
1090 {
1091         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1092         struct v4l2_mbus_framefmt *mf = &fmt->format;
1093         struct flite_frame *sink = &fimc->inp_frame;
1094         struct flite_frame *source = &fimc->out_frame;
1095         const struct fimc_fmt *ffmt;
1096 
1097         v4l2_dbg(1, debug, sd, "pad%d: code: 0x%x, %dx%d\n",
1098                  fmt->pad, mf->code, mf->width, mf->height);
1099 
1100         mutex_lock(&fimc->lock);
1101 
1102         if ((atomic_read(&fimc->out_path) == FIMC_IO_ISP &&
1103             sd->entity.stream_count > 0) ||
1104             (atomic_read(&fimc->out_path) == FIMC_IO_DMA &&
1105             vb2_is_busy(&fimc->vb_queue))) {
1106                 mutex_unlock(&fimc->lock);
1107                 return -EBUSY;
1108         }
1109 
1110         ffmt = fimc_lite_subdev_try_fmt(fimc, cfg, fmt);
1111 
1112         if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
1113                 struct v4l2_mbus_framefmt *src_fmt;
1114 
1115                 mf = __fimc_lite_subdev_get_try_fmt(sd, cfg, fmt->pad);
1116                 *mf = fmt->format;
1117 
1118                 if (fmt->pad == FLITE_SD_PAD_SINK) {
1119                         unsigned int pad = FLITE_SD_PAD_SOURCE_DMA;
1120                         src_fmt = __fimc_lite_subdev_get_try_fmt(sd, cfg, pad);
1121                         *src_fmt = *mf;
1122                 }
1123 
1124                 mutex_unlock(&fimc->lock);
1125                 return 0;
1126         }
1127 
1128         if (fmt->pad == FLITE_SD_PAD_SINK) {
1129                 sink->f_width = mf->width;
1130                 sink->f_height = mf->height;
1131                 sink->fmt = ffmt;
1132                 /* Set sink crop rectangle */
1133                 sink->rect.width = mf->width;
1134                 sink->rect.height = mf->height;
1135                 sink->rect.left = 0;
1136                 sink->rect.top = 0;
1137                 /* Reset source format and crop rectangle */
1138                 source->rect = sink->rect;
1139                 source->f_width = mf->width;
1140                 source->f_height = mf->height;
1141         }
1142 
1143         mutex_unlock(&fimc->lock);
1144         return 0;
1145 }
1146 
1147 static int fimc_lite_subdev_get_selection(struct v4l2_subdev *sd,
1148                                           struct v4l2_subdev_pad_config *cfg,
1149                                           struct v4l2_subdev_selection *sel)
1150 {
1151         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1152         struct flite_frame *f = &fimc->inp_frame;
1153 
1154         if ((sel->target != V4L2_SEL_TGT_CROP &&
1155              sel->target != V4L2_SEL_TGT_CROP_BOUNDS) ||
1156              sel->pad != FLITE_SD_PAD_SINK)
1157                 return -EINVAL;
1158 
1159         if (sel->which == V4L2_SUBDEV_FORMAT_TRY) {
1160                 sel->r = *v4l2_subdev_get_try_crop(sd, cfg, sel->pad);
1161                 return 0;
1162         }
1163 
1164         mutex_lock(&fimc->lock);
1165         if (sel->target == V4L2_SEL_TGT_CROP) {
1166                 sel->r = f->rect;
1167         } else {
1168                 sel->r.left = 0;
1169                 sel->r.top = 0;
1170                 sel->r.width = f->f_width;
1171                 sel->r.height = f->f_height;
1172         }
1173         mutex_unlock(&fimc->lock);
1174 
1175         v4l2_dbg(1, debug, sd, "%s: (%d,%d) %dx%d, f_w: %d, f_h: %d\n",
1176                  __func__, f->rect.left, f->rect.top, f->rect.width,
1177                  f->rect.height, f->f_width, f->f_height);
1178 
1179         return 0;
1180 }
1181 
1182 static int fimc_lite_subdev_set_selection(struct v4l2_subdev *sd,
1183                                           struct v4l2_subdev_pad_config *cfg,
1184                                           struct v4l2_subdev_selection *sel)
1185 {
1186         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1187         struct flite_frame *f = &fimc->inp_frame;
1188         int ret = 0;
1189 
1190         if (sel->target != V4L2_SEL_TGT_CROP || sel->pad != FLITE_SD_PAD_SINK)
1191                 return -EINVAL;
1192 
1193         mutex_lock(&fimc->lock);
1194         fimc_lite_try_crop(fimc, &sel->r);
1195 
1196         if (sel->which == V4L2_SUBDEV_FORMAT_TRY) {
1197                 *v4l2_subdev_get_try_crop(sd, cfg, sel->pad) = sel->r;
1198         } else {
1199                 unsigned long flags;
1200                 spin_lock_irqsave(&fimc->slock, flags);
1201                 f->rect = sel->r;
1202                 /* Same crop rectangle on the source pad */
1203                 fimc->out_frame.rect = sel->r;
1204                 set_bit(ST_FLITE_CONFIG, &fimc->state);
1205                 spin_unlock_irqrestore(&fimc->slock, flags);
1206         }
1207         mutex_unlock(&fimc->lock);
1208 
1209         v4l2_dbg(1, debug, sd, "%s: (%d,%d) %dx%d, f_w: %d, f_h: %d\n",
1210                  __func__, f->rect.left, f->rect.top, f->rect.width,
1211                  f->rect.height, f->f_width, f->f_height);
1212 
1213         return ret;
1214 }
1215 
1216 static int fimc_lite_subdev_s_stream(struct v4l2_subdev *sd, int on)
1217 {
1218         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1219         unsigned long flags;
1220         int ret;
1221 
1222         /*
1223          * Find sensor subdev linked to FIMC-LITE directly or through
1224          * MIPI-CSIS. This is required for configuration where FIMC-LITE
1225          * is used as a subdev only and feeds data internally to FIMC-IS.
1226          * The pipeline links are protected through entity.stream_count
1227          * so there is no need to take the media graph mutex here.
1228          */
1229         fimc->sensor = fimc_find_remote_sensor(&sd->entity);
1230 
1231         if (atomic_read(&fimc->out_path) != FIMC_IO_ISP)
1232                 return -ENOIOCTLCMD;
1233 
1234         mutex_lock(&fimc->lock);
1235         if (on) {
1236                 flite_hw_reset(fimc);
1237                 ret = fimc_lite_hw_init(fimc, true);
1238                 if (!ret) {
1239                         spin_lock_irqsave(&fimc->slock, flags);
1240                         flite_hw_capture_start(fimc);
1241                         spin_unlock_irqrestore(&fimc->slock, flags);
1242                 }
1243         } else {
1244                 set_bit(ST_FLITE_OFF, &fimc->state);
1245 
1246                 spin_lock_irqsave(&fimc->slock, flags);
1247                 flite_hw_capture_stop(fimc);
1248                 spin_unlock_irqrestore(&fimc->slock, flags);
1249 
1250                 ret = wait_event_timeout(fimc->irq_queue,
1251                                 !test_bit(ST_FLITE_OFF, &fimc->state),
1252                                 msecs_to_jiffies(200));
1253                 if (ret == 0)
1254                         v4l2_err(sd, "s_stream(0) timeout\n");
1255                 clear_bit(ST_FLITE_RUN, &fimc->state);
1256         }
1257 
1258         mutex_unlock(&fimc->lock);
1259         return ret;
1260 }
1261 
1262 static int fimc_lite_log_status(struct v4l2_subdev *sd)
1263 {
1264         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1265 
1266         flite_hw_dump_regs(fimc, __func__);
1267         return 0;
1268 }
1269 
1270 static int fimc_lite_subdev_registered(struct v4l2_subdev *sd)
1271 {
1272         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1273         struct vb2_queue *q = &fimc->vb_queue;
1274         struct video_device *vfd = &fimc->ve.vdev;
1275         int ret;
1276 
1277         memset(vfd, 0, sizeof(*vfd));
1278         atomic_set(&fimc->out_path, FIMC_IO_DMA);
1279 
1280         snprintf(vfd->name, sizeof(vfd->name), "fimc-lite.%d.capture",
1281                  fimc->index);
1282 
1283         vfd->fops = &fimc_lite_fops;
1284         vfd->ioctl_ops = &fimc_lite_ioctl_ops;
1285         vfd->v4l2_dev = sd->v4l2_dev;
1286         vfd->minor = -1;
1287         vfd->release = video_device_release_empty;
1288         vfd->queue = q;
1289         fimc->reqbufs_count = 0;
1290 
1291         INIT_LIST_HEAD(&fimc->pending_buf_q);
1292         INIT_LIST_HEAD(&fimc->active_buf_q);
1293 
1294         memset(q, 0, sizeof(*q));
1295         q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
1296         q->io_modes = VB2_MMAP | VB2_USERPTR;
1297         q->ops = &fimc_lite_qops;
1298         q->mem_ops = &vb2_dma_contig_memops;
1299         q->buf_struct_size = sizeof(struct flite_buffer);
1300         q->drv_priv = fimc;
1301         q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1302         q->lock = &fimc->lock;
1303 
1304         ret = vb2_queue_init(q);
1305         if (ret < 0)
1306                 return ret;
1307 
1308         fimc->vd_pad.flags = MEDIA_PAD_FL_SINK;
1309         ret = media_entity_pads_init(&vfd->entity, 1, &fimc->vd_pad);
1310         if (ret < 0)
1311                 return ret;
1312 
1313         video_set_drvdata(vfd, fimc);
1314         fimc->ve.pipe = v4l2_get_subdev_hostdata(sd);
1315 
1316         ret = video_register_device(vfd, VFL_TYPE_GRABBER, -1);
1317         if (ret < 0) {
1318                 media_entity_cleanup(&vfd->entity);
1319                 fimc->ve.pipe = NULL;
1320                 return ret;
1321         }
1322 
1323         v4l2_info(sd->v4l2_dev, "Registered %s as /dev/%s\n",
1324                   vfd->name, video_device_node_name(vfd));
1325         return 0;
1326 }
1327 
1328 static void fimc_lite_subdev_unregistered(struct v4l2_subdev *sd)
1329 {
1330         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1331 
1332         if (fimc == NULL)
1333                 return;
1334 
1335         mutex_lock(&fimc->lock);
1336 
1337         if (video_is_registered(&fimc->ve.vdev)) {
1338                 video_unregister_device(&fimc->ve.vdev);
1339                 media_entity_cleanup(&fimc->ve.vdev.entity);
1340                 fimc->ve.pipe = NULL;
1341         }
1342 
1343         mutex_unlock(&fimc->lock);
1344 }
1345 
1346 static const struct v4l2_subdev_internal_ops fimc_lite_subdev_internal_ops = {
1347         .registered = fimc_lite_subdev_registered,
1348         .unregistered = fimc_lite_subdev_unregistered,
1349 };
1350 
1351 static const struct v4l2_subdev_pad_ops fimc_lite_subdev_pad_ops = {
1352         .enum_mbus_code = fimc_lite_subdev_enum_mbus_code,
1353         .get_selection = fimc_lite_subdev_get_selection,
1354         .set_selection = fimc_lite_subdev_set_selection,
1355         .get_fmt = fimc_lite_subdev_get_fmt,
1356         .set_fmt = fimc_lite_subdev_set_fmt,
1357 };
1358 
1359 static const struct v4l2_subdev_video_ops fimc_lite_subdev_video_ops = {
1360         .s_stream = fimc_lite_subdev_s_stream,
1361 };
1362 
1363 static const struct v4l2_subdev_core_ops fimc_lite_core_ops = {
1364         .log_status = fimc_lite_log_status,
1365 };
1366 
1367 static struct v4l2_subdev_ops fimc_lite_subdev_ops = {
1368         .core = &fimc_lite_core_ops,
1369         .video = &fimc_lite_subdev_video_ops,
1370         .pad = &fimc_lite_subdev_pad_ops,
1371 };
1372 
1373 static int fimc_lite_s_ctrl(struct v4l2_ctrl *ctrl)
1374 {
1375         struct fimc_lite *fimc = container_of(ctrl->handler, struct fimc_lite,
1376                                               ctrl_handler);
1377         set_bit(ST_FLITE_CONFIG, &fimc->state);
1378         return 0;
1379 }
1380 
1381 static const struct v4l2_ctrl_ops fimc_lite_ctrl_ops = {
1382         .s_ctrl = fimc_lite_s_ctrl,
1383 };
1384 
1385 static const struct v4l2_ctrl_config fimc_lite_ctrl = {
1386         .ops    = &fimc_lite_ctrl_ops,
1387         .id     = V4L2_CTRL_CLASS_USER | 0x1001,
1388         .type   = V4L2_CTRL_TYPE_BOOLEAN,
1389         .name   = "Test Pattern 640x480",
1390         .step   = 1,
1391 };
1392 
1393 static void fimc_lite_set_default_config(struct fimc_lite *fimc)
1394 {
1395         struct flite_frame *sink = &fimc->inp_frame;
1396         struct flite_frame *source = &fimc->out_frame;
1397 
1398         sink->fmt = &fimc_lite_formats[0];
1399         sink->f_width = FLITE_DEFAULT_WIDTH;
1400         sink->f_height = FLITE_DEFAULT_HEIGHT;
1401 
1402         sink->rect.width = FLITE_DEFAULT_WIDTH;
1403         sink->rect.height = FLITE_DEFAULT_HEIGHT;
1404         sink->rect.left = 0;
1405         sink->rect.top = 0;
1406 
1407         *source = *sink;
1408 }
1409 
1410 static int fimc_lite_create_capture_subdev(struct fimc_lite *fimc)
1411 {
1412         struct v4l2_ctrl_handler *handler = &fimc->ctrl_handler;
1413         struct v4l2_subdev *sd = &fimc->subdev;
1414         int ret;
1415 
1416         v4l2_subdev_init(sd, &fimc_lite_subdev_ops);
1417         sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
1418         snprintf(sd->name, sizeof(sd->name), "FIMC-LITE.%d", fimc->index);
1419 
1420         fimc->subdev_pads[FLITE_SD_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
1421         fimc->subdev_pads[FLITE_SD_PAD_SOURCE_DMA].flags = MEDIA_PAD_FL_SOURCE;
1422         fimc->subdev_pads[FLITE_SD_PAD_SOURCE_ISP].flags = MEDIA_PAD_FL_SOURCE;
1423         ret = media_entity_pads_init(&sd->entity, FLITE_SD_PADS_NUM,
1424                                 fimc->subdev_pads);
1425         if (ret)
1426                 return ret;
1427 
1428         v4l2_ctrl_handler_init(handler, 1);
1429         fimc->test_pattern = v4l2_ctrl_new_custom(handler, &fimc_lite_ctrl,
1430                                                   NULL);
1431         if (handler->error) {
1432                 media_entity_cleanup(&sd->entity);
1433                 return handler->error;
1434         }
1435 
1436         sd->ctrl_handler = handler;
1437         sd->internal_ops = &fimc_lite_subdev_internal_ops;
1438         sd->entity.ops = &fimc_lite_subdev_media_ops;
1439         sd->owner = THIS_MODULE;
1440         v4l2_set_subdevdata(sd, fimc);
1441 
1442         return 0;
1443 }
1444 
1445 static void fimc_lite_unregister_capture_subdev(struct fimc_lite *fimc)
1446 {
1447         struct v4l2_subdev *sd = &fimc->subdev;
1448 
1449         v4l2_device_unregister_subdev(sd);
1450         media_entity_cleanup(&sd->entity);
1451         v4l2_ctrl_handler_free(&fimc->ctrl_handler);
1452         v4l2_set_subdevdata(sd, NULL);
1453 }
1454 
1455 static void fimc_lite_clk_put(struct fimc_lite *fimc)
1456 {
1457         if (IS_ERR(fimc->clock))
1458                 return;
1459 
1460         clk_unprepare(fimc->clock);
1461         clk_put(fimc->clock);
1462         fimc->clock = ERR_PTR(-EINVAL);
1463 }
1464 
1465 static int fimc_lite_clk_get(struct fimc_lite *fimc)
1466 {
1467         int ret;
1468 
1469         fimc->clock = clk_get(&fimc->pdev->dev, FLITE_CLK_NAME);
1470         if (IS_ERR(fimc->clock))
1471                 return PTR_ERR(fimc->clock);
1472 
1473         ret = clk_prepare(fimc->clock);
1474         if (ret < 0) {
1475                 clk_put(fimc->clock);
1476                 fimc->clock = ERR_PTR(-EINVAL);
1477         }
1478         return ret;
1479 }
1480 
1481 static const struct of_device_id flite_of_match[];
1482 
1483 static int fimc_lite_probe(struct platform_device *pdev)
1484 {
1485         struct flite_drvdata *drv_data = NULL;
1486         struct device *dev = &pdev->dev;
1487         const struct of_device_id *of_id;
1488         struct fimc_lite *fimc;
1489         struct resource *res;
1490         int ret;
1491 
1492         if (!dev->of_node)
1493                 return -ENODEV;
1494 
1495         fimc = devm_kzalloc(dev, sizeof(*fimc), GFP_KERNEL);
1496         if (!fimc)
1497                 return -ENOMEM;
1498 
1499         of_id = of_match_node(flite_of_match, dev->of_node);
1500         if (of_id)
1501                 drv_data = (struct flite_drvdata *)of_id->data;
1502         fimc->index = of_alias_get_id(dev->of_node, "fimc-lite");
1503 
1504         if (!drv_data || fimc->index >= drv_data->num_instances ||
1505                                                 fimc->index < 0) {
1506                 dev_err(dev, "Wrong %s node alias\n",
1507                                         dev->of_node->full_name);
1508                 return -EINVAL;
1509         }
1510 
1511         fimc->dd = drv_data;
1512         fimc->pdev = pdev;
1513 
1514         init_waitqueue_head(&fimc->irq_queue);
1515         spin_lock_init(&fimc->slock);
1516         mutex_init(&fimc->lock);
1517 
1518         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1519         fimc->regs = devm_ioremap_resource(dev, res);
1520         if (IS_ERR(fimc->regs))
1521                 return PTR_ERR(fimc->regs);
1522 
1523         res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1524         if (res == NULL) {
1525                 dev_err(dev, "Failed to get IRQ resource\n");
1526                 return -ENXIO;
1527         }
1528 
1529         ret = fimc_lite_clk_get(fimc);
1530         if (ret)
1531                 return ret;
1532 
1533         ret = devm_request_irq(dev, res->start, flite_irq_handler,
1534                                0, dev_name(dev), fimc);
1535         if (ret) {
1536                 dev_err(dev, "Failed to install irq (%d)\n", ret);
1537                 goto err_clk_put;
1538         }
1539 
1540         /* The video node will be created within the subdev's registered() op */
1541         ret = fimc_lite_create_capture_subdev(fimc);
1542         if (ret)
1543                 goto err_clk_put;
1544 
1545         platform_set_drvdata(pdev, fimc);
1546         pm_runtime_enable(dev);
1547 
1548         if (!pm_runtime_enabled(dev)) {
1549                 ret = clk_enable(fimc->clock);
1550                 if (ret < 0)
1551                         goto err_sd;
1552         }
1553 
1554         fimc->alloc_ctx = vb2_dma_contig_init_ctx(dev);
1555         if (IS_ERR(fimc->alloc_ctx)) {
1556                 ret = PTR_ERR(fimc->alloc_ctx);
1557                 goto err_clk_dis;
1558         }
1559 
1560         fimc_lite_set_default_config(fimc);
1561 
1562         dev_dbg(dev, "FIMC-LITE.%d registered successfully\n",
1563                 fimc->index);
1564         return 0;
1565 
1566 err_clk_dis:
1567         if (!pm_runtime_enabled(dev))
1568                 clk_disable(fimc->clock);
1569 err_sd:
1570         fimc_lite_unregister_capture_subdev(fimc);
1571 err_clk_put:
1572         fimc_lite_clk_put(fimc);
1573         return ret;
1574 }
1575 
1576 #ifdef CONFIG_PM
1577 static int fimc_lite_runtime_resume(struct device *dev)
1578 {
1579         struct fimc_lite *fimc = dev_get_drvdata(dev);
1580 
1581         clk_enable(fimc->clock);
1582         return 0;
1583 }
1584 
1585 static int fimc_lite_runtime_suspend(struct device *dev)
1586 {
1587         struct fimc_lite *fimc = dev_get_drvdata(dev);
1588 
1589         clk_disable(fimc->clock);
1590         return 0;
1591 }
1592 #endif
1593 
1594 #ifdef CONFIG_PM_SLEEP
1595 static int fimc_lite_resume(struct device *dev)
1596 {
1597         struct fimc_lite *fimc = dev_get_drvdata(dev);
1598         struct flite_buffer *buf;
1599         unsigned long flags;
1600         int i;
1601 
1602         spin_lock_irqsave(&fimc->slock, flags);
1603         if (!test_and_clear_bit(ST_LPM, &fimc->state) ||
1604             !test_bit(ST_FLITE_IN_USE, &fimc->state)) {
1605                 spin_unlock_irqrestore(&fimc->slock, flags);
1606                 return 0;
1607         }
1608         flite_hw_reset(fimc);
1609         spin_unlock_irqrestore(&fimc->slock, flags);
1610 
1611         if (!test_and_clear_bit(ST_FLITE_SUSPENDED, &fimc->state))
1612                 return 0;
1613 
1614         INIT_LIST_HEAD(&fimc->active_buf_q);
1615         fimc_pipeline_call(&fimc->ve, open,
1616                            &fimc->ve.vdev.entity, false);
1617         fimc_lite_hw_init(fimc, atomic_read(&fimc->out_path) == FIMC_IO_ISP);
1618         clear_bit(ST_FLITE_SUSPENDED, &fimc->state);
1619 
1620         for (i = 0; i < fimc->reqbufs_count; i++) {
1621                 if (list_empty(&fimc->pending_buf_q))
1622                         break;
1623                 buf = fimc_lite_pending_queue_pop(fimc);
1624                 buffer_queue(&buf->vb.vb2_buf);
1625         }
1626         return 0;
1627 }
1628 
1629 static int fimc_lite_suspend(struct device *dev)
1630 {
1631         struct fimc_lite *fimc = dev_get_drvdata(dev);
1632         bool suspend = test_bit(ST_FLITE_IN_USE, &fimc->state);
1633         int ret;
1634 
1635         if (test_and_set_bit(ST_LPM, &fimc->state))
1636                 return 0;
1637 
1638         ret = fimc_lite_stop_capture(fimc, suspend);
1639         if (ret < 0 || !fimc_lite_active(fimc))
1640                 return ret;
1641 
1642         return fimc_pipeline_call(&fimc->ve, close);
1643 }
1644 #endif /* CONFIG_PM_SLEEP */
1645 
1646 static int fimc_lite_remove(struct platform_device *pdev)
1647 {
1648         struct fimc_lite *fimc = platform_get_drvdata(pdev);
1649         struct device *dev = &pdev->dev;
1650 
1651         pm_runtime_disable(dev);
1652         pm_runtime_set_suspended(dev);
1653         fimc_lite_unregister_capture_subdev(fimc);
1654         vb2_dma_contig_cleanup_ctx(fimc->alloc_ctx);
1655         fimc_lite_clk_put(fimc);
1656 
1657         dev_info(dev, "Driver unloaded\n");
1658         return 0;
1659 }
1660 
1661 static const struct dev_pm_ops fimc_lite_pm_ops = {
1662         SET_SYSTEM_SLEEP_PM_OPS(fimc_lite_suspend, fimc_lite_resume)
1663         SET_RUNTIME_PM_OPS(fimc_lite_runtime_suspend, fimc_lite_runtime_resume,
1664                            NULL)
1665 };
1666 
1667 /* EXYNOS4212, EXYNOS4412 */
1668 static struct flite_drvdata fimc_lite_drvdata_exynos4 = {
1669         .max_width              = 8192,
1670         .max_height             = 8192,
1671         .out_width_align        = 8,
1672         .win_hor_offs_align     = 2,
1673         .out_hor_offs_align     = 8,
1674         .max_dma_bufs           = 1,
1675         .num_instances          = 2,
1676 };
1677 
1678 /* EXYNOS5250 */
1679 static struct flite_drvdata fimc_lite_drvdata_exynos5 = {
1680         .max_width              = 8192,
1681         .max_height             = 8192,
1682         .out_width_align        = 8,
1683         .win_hor_offs_align     = 2,
1684         .out_hor_offs_align     = 8,
1685         .max_dma_bufs           = 32,
1686         .num_instances          = 3,
1687 };
1688 
1689 static const struct of_device_id flite_of_match[] = {
1690         {
1691                 .compatible = "samsung,exynos4212-fimc-lite",
1692                 .data = &fimc_lite_drvdata_exynos4,
1693         },
1694         {
1695                 .compatible = "samsung,exynos5250-fimc-lite",
1696                 .data = &fimc_lite_drvdata_exynos5,
1697         },
1698         { /* sentinel */ },
1699 };
1700 MODULE_DEVICE_TABLE(of, flite_of_match);
1701 
1702 static struct platform_driver fimc_lite_driver = {
1703         .probe          = fimc_lite_probe,
1704         .remove         = fimc_lite_remove,
1705         .driver = {
1706                 .of_match_table = flite_of_match,
1707                 .name           = FIMC_LITE_DRV_NAME,
1708                 .pm             = &fimc_lite_pm_ops,
1709         }
1710 };
1711 module_platform_driver(fimc_lite_driver);
1712 MODULE_LICENSE("GPL");
1713 MODULE_ALIAS("platform:" FIMC_LITE_DRV_NAME);
1714 

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