Version:  2.0.40 2.2.26 2.4.37 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 4.8 4.9

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[], struct device *alloc_devs[])
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                 return 0;
378         }
379 
380         *num_planes = fmt->memplanes;
381 
382         for (i = 0; i < fmt->memplanes; i++)
383                 sizes[i] = (wh * fmt->depth[i]) / 8;
384 
385         return 0;
386 }
387 
388 static int buffer_prepare(struct vb2_buffer *vb)
389 {
390         struct vb2_queue *vq = vb->vb2_queue;
391         struct fimc_lite *fimc = vq->drv_priv;
392         int i;
393 
394         if (fimc->out_frame.fmt == NULL)
395                 return -EINVAL;
396 
397         for (i = 0; i < fimc->out_frame.fmt->memplanes; i++) {
398                 unsigned long size = fimc->payload[i];
399 
400                 if (vb2_plane_size(vb, i) < size) {
401                         v4l2_err(&fimc->ve.vdev,
402                                  "User buffer too small (%ld < %ld)\n",
403                                  vb2_plane_size(vb, i), size);
404                         return -EINVAL;
405                 }
406                 vb2_set_plane_payload(vb, i, size);
407         }
408 
409         return 0;
410 }
411 
412 static void buffer_queue(struct vb2_buffer *vb)
413 {
414         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
415         struct flite_buffer *buf
416                 = container_of(vbuf, struct flite_buffer, vb);
417         struct fimc_lite *fimc = vb2_get_drv_priv(vb->vb2_queue);
418         unsigned long flags;
419 
420         spin_lock_irqsave(&fimc->slock, flags);
421         buf->paddr = vb2_dma_contig_plane_dma_addr(vb, 0);
422 
423         buf->index = fimc->buf_index++;
424         if (fimc->buf_index >= fimc->reqbufs_count)
425                 fimc->buf_index = 0;
426 
427         if (!test_bit(ST_FLITE_SUSPENDED, &fimc->state) &&
428             !test_bit(ST_FLITE_STREAM, &fimc->state) &&
429             list_empty(&fimc->active_buf_q)) {
430                 flite_hw_set_dma_buffer(fimc, buf);
431                 fimc_lite_active_queue_add(fimc, buf);
432         } else {
433                 fimc_lite_pending_queue_add(fimc, buf);
434         }
435 
436         if (vb2_is_streaming(&fimc->vb_queue) &&
437             !list_empty(&fimc->pending_buf_q) &&
438             !test_and_set_bit(ST_FLITE_STREAM, &fimc->state)) {
439                 flite_hw_capture_start(fimc);
440                 spin_unlock_irqrestore(&fimc->slock, flags);
441 
442                 if (!test_and_set_bit(ST_SENSOR_STREAM, &fimc->state))
443                         fimc_pipeline_call(&fimc->ve, set_stream, 1);
444                 return;
445         }
446         spin_unlock_irqrestore(&fimc->slock, flags);
447 }
448 
449 static const struct vb2_ops fimc_lite_qops = {
450         .queue_setup     = queue_setup,
451         .buf_prepare     = buffer_prepare,
452         .buf_queue       = buffer_queue,
453         .wait_prepare    = vb2_ops_wait_prepare,
454         .wait_finish     = vb2_ops_wait_finish,
455         .start_streaming = start_streaming,
456         .stop_streaming  = stop_streaming,
457 };
458 
459 static void fimc_lite_clear_event_counters(struct fimc_lite *fimc)
460 {
461         unsigned long flags;
462 
463         spin_lock_irqsave(&fimc->slock, flags);
464         memset(&fimc->events, 0, sizeof(fimc->events));
465         spin_unlock_irqrestore(&fimc->slock, flags);
466 }
467 
468 static int fimc_lite_open(struct file *file)
469 {
470         struct fimc_lite *fimc = video_drvdata(file);
471         struct media_entity *me = &fimc->ve.vdev.entity;
472         int ret;
473 
474         mutex_lock(&fimc->lock);
475         if (atomic_read(&fimc->out_path) != FIMC_IO_DMA) {
476                 ret = -EBUSY;
477                 goto unlock;
478         }
479 
480         set_bit(ST_FLITE_IN_USE, &fimc->state);
481         ret = pm_runtime_get_sync(&fimc->pdev->dev);
482         if (ret < 0)
483                 goto unlock;
484 
485         ret = v4l2_fh_open(file);
486         if (ret < 0)
487                 goto err_pm;
488 
489         if (!v4l2_fh_is_singular_file(file) ||
490             atomic_read(&fimc->out_path) != FIMC_IO_DMA)
491                 goto unlock;
492 
493         mutex_lock(&me->graph_obj.mdev->graph_mutex);
494 
495         ret = fimc_pipeline_call(&fimc->ve, open, me, true);
496 
497         /* Mark video pipeline ending at this video node as in use. */
498         if (ret == 0)
499                 me->use_count++;
500 
501         mutex_unlock(&me->graph_obj.mdev->graph_mutex);
502 
503         if (!ret) {
504                 fimc_lite_clear_event_counters(fimc);
505                 goto unlock;
506         }
507 
508         v4l2_fh_release(file);
509 err_pm:
510         pm_runtime_put_sync(&fimc->pdev->dev);
511         clear_bit(ST_FLITE_IN_USE, &fimc->state);
512 unlock:
513         mutex_unlock(&fimc->lock);
514         return ret;
515 }
516 
517 static int fimc_lite_release(struct file *file)
518 {
519         struct fimc_lite *fimc = video_drvdata(file);
520         struct media_entity *entity = &fimc->ve.vdev.entity;
521 
522         mutex_lock(&fimc->lock);
523 
524         if (v4l2_fh_is_singular_file(file) &&
525             atomic_read(&fimc->out_path) == FIMC_IO_DMA) {
526                 if (fimc->streaming) {
527                         media_entity_pipeline_stop(entity);
528                         fimc->streaming = false;
529                 }
530                 fimc_lite_stop_capture(fimc, false);
531                 fimc_pipeline_call(&fimc->ve, close);
532                 clear_bit(ST_FLITE_IN_USE, &fimc->state);
533 
534                 mutex_lock(&entity->graph_obj.mdev->graph_mutex);
535                 entity->use_count--;
536                 mutex_unlock(&entity->graph_obj.mdev->graph_mutex);
537         }
538 
539         _vb2_fop_release(file, NULL);
540         pm_runtime_put(&fimc->pdev->dev);
541         clear_bit(ST_FLITE_SUSPENDED, &fimc->state);
542 
543         mutex_unlock(&fimc->lock);
544         return 0;
545 }
546 
547 static const struct v4l2_file_operations fimc_lite_fops = {
548         .owner          = THIS_MODULE,
549         .open           = fimc_lite_open,
550         .release        = fimc_lite_release,
551         .poll           = vb2_fop_poll,
552         .unlocked_ioctl = video_ioctl2,
553         .mmap           = vb2_fop_mmap,
554 };
555 
556 /*
557  * Format and crop negotiation helpers
558  */
559 
560 static const struct fimc_fmt *fimc_lite_subdev_try_fmt(struct fimc_lite *fimc,
561                                         struct v4l2_subdev_pad_config *cfg,
562                                         struct v4l2_subdev_format *format)
563 {
564         struct flite_drvdata *dd = fimc->dd;
565         struct v4l2_mbus_framefmt *mf = &format->format;
566         const struct fimc_fmt *fmt = NULL;
567 
568         if (format->pad == FLITE_SD_PAD_SINK) {
569                 v4l_bound_align_image(&mf->width, 8, dd->max_width,
570                                 ffs(dd->out_width_align) - 1,
571                                 &mf->height, 0, dd->max_height, 0, 0);
572 
573                 fmt = fimc_lite_find_format(NULL, &mf->code, 0, 0);
574                 if (WARN_ON(!fmt))
575                         return NULL;
576 
577                 mf->colorspace = fmt->colorspace;
578                 mf->code = fmt->mbus_code;
579         } else {
580                 struct flite_frame *sink = &fimc->inp_frame;
581                 struct v4l2_mbus_framefmt *sink_fmt;
582                 struct v4l2_rect *rect;
583 
584                 if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
585                         sink_fmt = v4l2_subdev_get_try_format(&fimc->subdev, cfg,
586                                                 FLITE_SD_PAD_SINK);
587 
588                         mf->code = sink_fmt->code;
589                         mf->colorspace = sink_fmt->colorspace;
590 
591                         rect = v4l2_subdev_get_try_crop(&fimc->subdev, cfg,
592                                                 FLITE_SD_PAD_SINK);
593                 } else {
594                         mf->code = sink->fmt->mbus_code;
595                         mf->colorspace = sink->fmt->colorspace;
596                         rect = &sink->rect;
597                 }
598 
599                 /* Allow changing format only on sink pad */
600                 mf->width = rect->width;
601                 mf->height = rect->height;
602         }
603 
604         mf->field = V4L2_FIELD_NONE;
605 
606         v4l2_dbg(1, debug, &fimc->subdev, "code: %#x (%d), %dx%d\n",
607                  mf->code, mf->colorspace, mf->width, mf->height);
608 
609         return fmt;
610 }
611 
612 static void fimc_lite_try_crop(struct fimc_lite *fimc, struct v4l2_rect *r)
613 {
614         struct flite_frame *frame = &fimc->inp_frame;
615 
616         v4l_bound_align_image(&r->width, 0, frame->f_width, 0,
617                               &r->height, 0, frame->f_height, 0, 0);
618 
619         /* Adjust left/top if cropping rectangle got out of bounds */
620         r->left = clamp_t(u32, r->left, 0, frame->f_width - r->width);
621         r->left = round_down(r->left, fimc->dd->win_hor_offs_align);
622         r->top  = clamp_t(u32, r->top, 0, frame->f_height - r->height);
623 
624         v4l2_dbg(1, debug, &fimc->subdev, "(%d,%d)/%dx%d, sink fmt: %dx%d\n",
625                  r->left, r->top, r->width, r->height,
626                  frame->f_width, frame->f_height);
627 }
628 
629 static void fimc_lite_try_compose(struct fimc_lite *fimc, struct v4l2_rect *r)
630 {
631         struct flite_frame *frame = &fimc->out_frame;
632         struct v4l2_rect *crop_rect = &fimc->inp_frame.rect;
633 
634         /* Scaling is not supported so we enforce compose rectangle size
635            same as size of the sink crop rectangle. */
636         r->width = crop_rect->width;
637         r->height = crop_rect->height;
638 
639         /* Adjust left/top if the composing rectangle got out of bounds */
640         r->left = clamp_t(u32, r->left, 0, frame->f_width - r->width);
641         r->left = round_down(r->left, fimc->dd->out_hor_offs_align);
642         r->top  = clamp_t(u32, r->top, 0, fimc->out_frame.f_height - r->height);
643 
644         v4l2_dbg(1, debug, &fimc->subdev, "(%d,%d)/%dx%d, source fmt: %dx%d\n",
645                  r->left, r->top, r->width, r->height,
646                  frame->f_width, frame->f_height);
647 }
648 
649 /*
650  * Video node ioctl operations
651  */
652 static int fimc_lite_querycap(struct file *file, void *priv,
653                                         struct v4l2_capability *cap)
654 {
655         struct fimc_lite *fimc = video_drvdata(file);
656 
657         strlcpy(cap->driver, FIMC_LITE_DRV_NAME, sizeof(cap->driver));
658         strlcpy(cap->card, FIMC_LITE_DRV_NAME, sizeof(cap->card));
659         snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
660                                         dev_name(&fimc->pdev->dev));
661 
662         cap->device_caps = V4L2_CAP_STREAMING;
663         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
664         return 0;
665 }
666 
667 static int fimc_lite_enum_fmt_mplane(struct file *file, void *priv,
668                                      struct v4l2_fmtdesc *f)
669 {
670         const struct fimc_fmt *fmt;
671 
672         if (f->index >= ARRAY_SIZE(fimc_lite_formats))
673                 return -EINVAL;
674 
675         fmt = &fimc_lite_formats[f->index];
676         strlcpy(f->description, fmt->name, sizeof(f->description));
677         f->pixelformat = fmt->fourcc;
678 
679         return 0;
680 }
681 
682 static int fimc_lite_g_fmt_mplane(struct file *file, void *fh,
683                                   struct v4l2_format *f)
684 {
685         struct fimc_lite *fimc = video_drvdata(file);
686         struct v4l2_pix_format_mplane *pixm = &f->fmt.pix_mp;
687         struct v4l2_plane_pix_format *plane_fmt = &pixm->plane_fmt[0];
688         struct flite_frame *frame = &fimc->out_frame;
689         const struct fimc_fmt *fmt = frame->fmt;
690 
691         plane_fmt->bytesperline = (frame->f_width * fmt->depth[0]) / 8;
692         plane_fmt->sizeimage = plane_fmt->bytesperline * frame->f_height;
693 
694         pixm->num_planes = fmt->memplanes;
695         pixm->pixelformat = fmt->fourcc;
696         pixm->width = frame->f_width;
697         pixm->height = frame->f_height;
698         pixm->field = V4L2_FIELD_NONE;
699         pixm->colorspace = fmt->colorspace;
700         return 0;
701 }
702 
703 static int fimc_lite_try_fmt(struct fimc_lite *fimc,
704                              struct v4l2_pix_format_mplane *pixm,
705                              const struct fimc_fmt **ffmt)
706 {
707         u32 bpl = pixm->plane_fmt[0].bytesperline;
708         struct flite_drvdata *dd = fimc->dd;
709         const struct fimc_fmt *inp_fmt = fimc->inp_frame.fmt;
710         const struct fimc_fmt *fmt;
711 
712         if (WARN_ON(inp_fmt == NULL))
713                 return -EINVAL;
714         /*
715          * We allow some flexibility only for YUV formats. In case of raw
716          * raw Bayer the FIMC-LITE's output format must match its camera
717          * interface input format.
718          */
719         if (inp_fmt->flags & FMT_FLAGS_YUV)
720                 fmt = fimc_lite_find_format(&pixm->pixelformat, NULL,
721                                                 inp_fmt->flags, 0);
722         else
723                 fmt = inp_fmt;
724 
725         if (WARN_ON(fmt == NULL))
726                 return -EINVAL;
727         if (ffmt)
728                 *ffmt = fmt;
729         v4l_bound_align_image(&pixm->width, 8, dd->max_width,
730                               ffs(dd->out_width_align) - 1,
731                               &pixm->height, 0, dd->max_height, 0, 0);
732 
733         if ((bpl == 0 || ((bpl * 8) / fmt->depth[0]) < pixm->width))
734                 pixm->plane_fmt[0].bytesperline = (pixm->width *
735                                                    fmt->depth[0]) / 8;
736 
737         if (pixm->plane_fmt[0].sizeimage == 0)
738                 pixm->plane_fmt[0].sizeimage = (pixm->width * pixm->height *
739                                                 fmt->depth[0]) / 8;
740         pixm->num_planes = fmt->memplanes;
741         pixm->pixelformat = fmt->fourcc;
742         pixm->colorspace = fmt->colorspace;
743         pixm->field = V4L2_FIELD_NONE;
744         return 0;
745 }
746 
747 static int fimc_lite_try_fmt_mplane(struct file *file, void *fh,
748                                     struct v4l2_format *f)
749 {
750         struct fimc_lite *fimc = video_drvdata(file);
751         return fimc_lite_try_fmt(fimc, &f->fmt.pix_mp, NULL);
752 }
753 
754 static int fimc_lite_s_fmt_mplane(struct file *file, void *priv,
755                                   struct v4l2_format *f)
756 {
757         struct v4l2_pix_format_mplane *pixm = &f->fmt.pix_mp;
758         struct fimc_lite *fimc = video_drvdata(file);
759         struct flite_frame *frame = &fimc->out_frame;
760         const struct fimc_fmt *fmt = NULL;
761         int ret;
762 
763         if (vb2_is_busy(&fimc->vb_queue))
764                 return -EBUSY;
765 
766         ret = fimc_lite_try_fmt(fimc, &f->fmt.pix_mp, &fmt);
767         if (ret < 0)
768                 return ret;
769 
770         frame->fmt = fmt;
771         fimc->payload[0] = max((pixm->width * pixm->height * fmt->depth[0]) / 8,
772                                pixm->plane_fmt[0].sizeimage);
773         frame->f_width = pixm->width;
774         frame->f_height = pixm->height;
775 
776         return 0;
777 }
778 
779 static int fimc_pipeline_validate(struct fimc_lite *fimc)
780 {
781         struct v4l2_subdev *sd = &fimc->subdev;
782         struct v4l2_subdev_format sink_fmt, src_fmt;
783         struct media_pad *pad;
784         int ret;
785 
786         while (1) {
787                 /* Retrieve format at the sink pad */
788                 pad = &sd->entity.pads[0];
789                 if (!(pad->flags & MEDIA_PAD_FL_SINK))
790                         break;
791                 /* Don't call FIMC subdev operation to avoid nested locking */
792                 if (sd == &fimc->subdev) {
793                         struct flite_frame *ff = &fimc->out_frame;
794                         sink_fmt.format.width = ff->f_width;
795                         sink_fmt.format.height = ff->f_height;
796                         sink_fmt.format.code = fimc->inp_frame.fmt->mbus_code;
797                 } else {
798                         sink_fmt.pad = pad->index;
799                         sink_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
800                         ret = v4l2_subdev_call(sd, pad, get_fmt, NULL,
801                                                &sink_fmt);
802                         if (ret < 0 && ret != -ENOIOCTLCMD)
803                                 return -EPIPE;
804                 }
805                 /* Retrieve format at the source pad */
806                 pad = media_entity_remote_pad(pad);
807                 if (!pad || !is_media_entity_v4l2_subdev(pad->entity))
808                         break;
809 
810                 sd = media_entity_to_v4l2_subdev(pad->entity);
811                 src_fmt.pad = pad->index;
812                 src_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
813                 ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &src_fmt);
814                 if (ret < 0 && ret != -ENOIOCTLCMD)
815                         return -EPIPE;
816 
817                 if (src_fmt.format.width != sink_fmt.format.width ||
818                     src_fmt.format.height != sink_fmt.format.height ||
819                     src_fmt.format.code != sink_fmt.format.code)
820                         return -EPIPE;
821         }
822         return 0;
823 }
824 
825 static int fimc_lite_streamon(struct file *file, void *priv,
826                               enum v4l2_buf_type type)
827 {
828         struct fimc_lite *fimc = video_drvdata(file);
829         struct media_entity *entity = &fimc->ve.vdev.entity;
830         int ret;
831 
832         if (fimc_lite_active(fimc))
833                 return -EBUSY;
834 
835         ret = media_entity_pipeline_start(entity, &fimc->ve.pipe->mp);
836         if (ret < 0)
837                 return ret;
838 
839         ret = fimc_pipeline_validate(fimc);
840         if (ret < 0)
841                 goto err_p_stop;
842 
843         fimc->sensor = fimc_find_remote_sensor(&fimc->subdev.entity);
844 
845         ret = vb2_ioctl_streamon(file, priv, type);
846         if (!ret) {
847                 fimc->streaming = true;
848                 return ret;
849         }
850 
851 err_p_stop:
852         media_entity_pipeline_stop(entity);
853         return 0;
854 }
855 
856 static int fimc_lite_streamoff(struct file *file, void *priv,
857                                enum v4l2_buf_type type)
858 {
859         struct fimc_lite *fimc = video_drvdata(file);
860         int ret;
861 
862         ret = vb2_ioctl_streamoff(file, priv, type);
863         if (ret < 0)
864                 return ret;
865 
866         media_entity_pipeline_stop(&fimc->ve.vdev.entity);
867         fimc->streaming = false;
868         return 0;
869 }
870 
871 static int fimc_lite_reqbufs(struct file *file, void *priv,
872                              struct v4l2_requestbuffers *reqbufs)
873 {
874         struct fimc_lite *fimc = video_drvdata(file);
875         int ret;
876 
877         reqbufs->count = max_t(u32, FLITE_REQ_BUFS_MIN, reqbufs->count);
878         ret = vb2_ioctl_reqbufs(file, priv, reqbufs);
879         if (!ret)
880                 fimc->reqbufs_count = reqbufs->count;
881 
882         return ret;
883 }
884 
885 /* Return 1 if rectangle a is enclosed in rectangle b, or 0 otherwise. */
886 static int enclosed_rectangle(struct v4l2_rect *a, struct v4l2_rect *b)
887 {
888         if (a->left < b->left || a->top < b->top)
889                 return 0;
890         if (a->left + a->width > b->left + b->width)
891                 return 0;
892         if (a->top + a->height > b->top + b->height)
893                 return 0;
894 
895         return 1;
896 }
897 
898 static int fimc_lite_g_selection(struct file *file, void *fh,
899                                  struct v4l2_selection *sel)
900 {
901         struct fimc_lite *fimc = video_drvdata(file);
902         struct flite_frame *f = &fimc->out_frame;
903 
904         if (sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
905                 return -EINVAL;
906 
907         switch (sel->target) {
908         case V4L2_SEL_TGT_COMPOSE_BOUNDS:
909         case V4L2_SEL_TGT_COMPOSE_DEFAULT:
910                 sel->r.left = 0;
911                 sel->r.top = 0;
912                 sel->r.width = f->f_width;
913                 sel->r.height = f->f_height;
914                 return 0;
915 
916         case V4L2_SEL_TGT_COMPOSE:
917                 sel->r = f->rect;
918                 return 0;
919         }
920 
921         return -EINVAL;
922 }
923 
924 static int fimc_lite_s_selection(struct file *file, void *fh,
925                                  struct v4l2_selection *sel)
926 {
927         struct fimc_lite *fimc = video_drvdata(file);
928         struct flite_frame *f = &fimc->out_frame;
929         struct v4l2_rect rect = sel->r;
930         unsigned long flags;
931 
932         if (sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE ||
933             sel->target != V4L2_SEL_TGT_COMPOSE)
934                 return -EINVAL;
935 
936         fimc_lite_try_compose(fimc, &rect);
937 
938         if ((sel->flags & V4L2_SEL_FLAG_LE) &&
939             !enclosed_rectangle(&rect, &sel->r))
940                 return -ERANGE;
941 
942         if ((sel->flags & V4L2_SEL_FLAG_GE) &&
943             !enclosed_rectangle(&sel->r, &rect))
944                 return -ERANGE;
945 
946         sel->r = rect;
947         spin_lock_irqsave(&fimc->slock, flags);
948         f->rect = rect;
949         set_bit(ST_FLITE_CONFIG, &fimc->state);
950         spin_unlock_irqrestore(&fimc->slock, flags);
951 
952         return 0;
953 }
954 
955 static const struct v4l2_ioctl_ops fimc_lite_ioctl_ops = {
956         .vidioc_querycap                = fimc_lite_querycap,
957         .vidioc_enum_fmt_vid_cap_mplane = fimc_lite_enum_fmt_mplane,
958         .vidioc_try_fmt_vid_cap_mplane  = fimc_lite_try_fmt_mplane,
959         .vidioc_s_fmt_vid_cap_mplane    = fimc_lite_s_fmt_mplane,
960         .vidioc_g_fmt_vid_cap_mplane    = fimc_lite_g_fmt_mplane,
961         .vidioc_g_selection             = fimc_lite_g_selection,
962         .vidioc_s_selection             = fimc_lite_s_selection,
963         .vidioc_reqbufs                 = fimc_lite_reqbufs,
964         .vidioc_querybuf                = vb2_ioctl_querybuf,
965         .vidioc_prepare_buf             = vb2_ioctl_prepare_buf,
966         .vidioc_create_bufs             = vb2_ioctl_create_bufs,
967         .vidioc_qbuf                    = vb2_ioctl_qbuf,
968         .vidioc_dqbuf                   = vb2_ioctl_dqbuf,
969         .vidioc_streamon                = fimc_lite_streamon,
970         .vidioc_streamoff               = fimc_lite_streamoff,
971 };
972 
973 /* Capture subdev media entity operations */
974 static int fimc_lite_link_setup(struct media_entity *entity,
975                                 const struct media_pad *local,
976                                 const struct media_pad *remote, u32 flags)
977 {
978         struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity);
979         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
980         int ret = 0;
981 
982         if (WARN_ON(fimc == NULL))
983                 return 0;
984 
985         v4l2_dbg(1, debug, sd, "%s: %s --> %s, flags: 0x%x. source_id: 0x%x\n",
986                  __func__, remote->entity->name, local->entity->name,
987                  flags, fimc->source_subdev_grp_id);
988 
989         switch (local->index) {
990         case FLITE_SD_PAD_SINK:
991                 if (flags & MEDIA_LNK_FL_ENABLED) {
992                         if (fimc->source_subdev_grp_id == 0)
993                                 fimc->source_subdev_grp_id = sd->grp_id;
994                         else
995                                 ret = -EBUSY;
996                 } else {
997                         fimc->source_subdev_grp_id = 0;
998                         fimc->sensor = NULL;
999                 }
1000                 break;
1001 
1002         case FLITE_SD_PAD_SOURCE_DMA:
1003                 if (!(flags & MEDIA_LNK_FL_ENABLED))
1004                         atomic_set(&fimc->out_path, FIMC_IO_NONE);
1005                 else
1006                         atomic_set(&fimc->out_path, FIMC_IO_DMA);
1007                 break;
1008 
1009         case FLITE_SD_PAD_SOURCE_ISP:
1010                 if (!(flags & MEDIA_LNK_FL_ENABLED))
1011                         atomic_set(&fimc->out_path, FIMC_IO_NONE);
1012                 else
1013                         atomic_set(&fimc->out_path, FIMC_IO_ISP);
1014                 break;
1015 
1016         default:
1017                 v4l2_err(sd, "Invalid pad index\n");
1018                 ret = -EINVAL;
1019         }
1020         mb();
1021 
1022         return ret;
1023 }
1024 
1025 static const struct media_entity_operations fimc_lite_subdev_media_ops = {
1026         .link_setup = fimc_lite_link_setup,
1027 };
1028 
1029 static int fimc_lite_subdev_enum_mbus_code(struct v4l2_subdev *sd,
1030                                            struct v4l2_subdev_pad_config *cfg,
1031                                            struct v4l2_subdev_mbus_code_enum *code)
1032 {
1033         const struct fimc_fmt *fmt;
1034 
1035         fmt = fimc_lite_find_format(NULL, NULL, 0, code->index);
1036         if (!fmt)
1037                 return -EINVAL;
1038         code->code = fmt->mbus_code;
1039         return 0;
1040 }
1041 
1042 static struct v4l2_mbus_framefmt *__fimc_lite_subdev_get_try_fmt(
1043                 struct v4l2_subdev *sd,
1044                 struct v4l2_subdev_pad_config *cfg, unsigned int pad)
1045 {
1046         if (pad != FLITE_SD_PAD_SINK)
1047                 pad = FLITE_SD_PAD_SOURCE_DMA;
1048 
1049         return v4l2_subdev_get_try_format(sd, cfg, pad);
1050 }
1051 
1052 static int fimc_lite_subdev_get_fmt(struct v4l2_subdev *sd,
1053                                     struct v4l2_subdev_pad_config *cfg,
1054                                     struct v4l2_subdev_format *fmt)
1055 {
1056         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1057         struct v4l2_mbus_framefmt *mf = &fmt->format;
1058         struct flite_frame *f = &fimc->inp_frame;
1059 
1060         if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
1061                 mf = __fimc_lite_subdev_get_try_fmt(sd, cfg, fmt->pad);
1062                 fmt->format = *mf;
1063                 return 0;
1064         }
1065 
1066         mutex_lock(&fimc->lock);
1067         mf->colorspace = f->fmt->colorspace;
1068         mf->code = f->fmt->mbus_code;
1069 
1070         if (fmt->pad == FLITE_SD_PAD_SINK) {
1071                 /* full camera input frame size */
1072                 mf->width = f->f_width;
1073                 mf->height = f->f_height;
1074         } else {
1075                 /* crop size */
1076                 mf->width = f->rect.width;
1077                 mf->height = f->rect.height;
1078         }
1079         mutex_unlock(&fimc->lock);
1080         return 0;
1081 }
1082 
1083 static int fimc_lite_subdev_set_fmt(struct v4l2_subdev *sd,
1084                                     struct v4l2_subdev_pad_config *cfg,
1085                                     struct v4l2_subdev_format *fmt)
1086 {
1087         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1088         struct v4l2_mbus_framefmt *mf = &fmt->format;
1089         struct flite_frame *sink = &fimc->inp_frame;
1090         struct flite_frame *source = &fimc->out_frame;
1091         const struct fimc_fmt *ffmt;
1092 
1093         v4l2_dbg(1, debug, sd, "pad%d: code: 0x%x, %dx%d\n",
1094                  fmt->pad, mf->code, mf->width, mf->height);
1095 
1096         mutex_lock(&fimc->lock);
1097 
1098         if ((atomic_read(&fimc->out_path) == FIMC_IO_ISP &&
1099             sd->entity.stream_count > 0) ||
1100             (atomic_read(&fimc->out_path) == FIMC_IO_DMA &&
1101             vb2_is_busy(&fimc->vb_queue))) {
1102                 mutex_unlock(&fimc->lock);
1103                 return -EBUSY;
1104         }
1105 
1106         ffmt = fimc_lite_subdev_try_fmt(fimc, cfg, fmt);
1107 
1108         if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
1109                 struct v4l2_mbus_framefmt *src_fmt;
1110 
1111                 mf = __fimc_lite_subdev_get_try_fmt(sd, cfg, fmt->pad);
1112                 *mf = fmt->format;
1113 
1114                 if (fmt->pad == FLITE_SD_PAD_SINK) {
1115                         unsigned int pad = FLITE_SD_PAD_SOURCE_DMA;
1116                         src_fmt = __fimc_lite_subdev_get_try_fmt(sd, cfg, pad);
1117                         *src_fmt = *mf;
1118                 }
1119 
1120                 mutex_unlock(&fimc->lock);
1121                 return 0;
1122         }
1123 
1124         if (fmt->pad == FLITE_SD_PAD_SINK) {
1125                 sink->f_width = mf->width;
1126                 sink->f_height = mf->height;
1127                 sink->fmt = ffmt;
1128                 /* Set sink crop rectangle */
1129                 sink->rect.width = mf->width;
1130                 sink->rect.height = mf->height;
1131                 sink->rect.left = 0;
1132                 sink->rect.top = 0;
1133                 /* Reset source format and crop rectangle */
1134                 source->rect = sink->rect;
1135                 source->f_width = mf->width;
1136                 source->f_height = mf->height;
1137         }
1138 
1139         mutex_unlock(&fimc->lock);
1140         return 0;
1141 }
1142 
1143 static int fimc_lite_subdev_get_selection(struct v4l2_subdev *sd,
1144                                           struct v4l2_subdev_pad_config *cfg,
1145                                           struct v4l2_subdev_selection *sel)
1146 {
1147         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1148         struct flite_frame *f = &fimc->inp_frame;
1149 
1150         if ((sel->target != V4L2_SEL_TGT_CROP &&
1151              sel->target != V4L2_SEL_TGT_CROP_BOUNDS) ||
1152              sel->pad != FLITE_SD_PAD_SINK)
1153                 return -EINVAL;
1154 
1155         if (sel->which == V4L2_SUBDEV_FORMAT_TRY) {
1156                 sel->r = *v4l2_subdev_get_try_crop(sd, cfg, sel->pad);
1157                 return 0;
1158         }
1159 
1160         mutex_lock(&fimc->lock);
1161         if (sel->target == V4L2_SEL_TGT_CROP) {
1162                 sel->r = f->rect;
1163         } else {
1164                 sel->r.left = 0;
1165                 sel->r.top = 0;
1166                 sel->r.width = f->f_width;
1167                 sel->r.height = f->f_height;
1168         }
1169         mutex_unlock(&fimc->lock);
1170 
1171         v4l2_dbg(1, debug, sd, "%s: (%d,%d) %dx%d, f_w: %d, f_h: %d\n",
1172                  __func__, f->rect.left, f->rect.top, f->rect.width,
1173                  f->rect.height, f->f_width, f->f_height);
1174 
1175         return 0;
1176 }
1177 
1178 static int fimc_lite_subdev_set_selection(struct v4l2_subdev *sd,
1179                                           struct v4l2_subdev_pad_config *cfg,
1180                                           struct v4l2_subdev_selection *sel)
1181 {
1182         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1183         struct flite_frame *f = &fimc->inp_frame;
1184         int ret = 0;
1185 
1186         if (sel->target != V4L2_SEL_TGT_CROP || sel->pad != FLITE_SD_PAD_SINK)
1187                 return -EINVAL;
1188 
1189         mutex_lock(&fimc->lock);
1190         fimc_lite_try_crop(fimc, &sel->r);
1191 
1192         if (sel->which == V4L2_SUBDEV_FORMAT_TRY) {
1193                 *v4l2_subdev_get_try_crop(sd, cfg, sel->pad) = sel->r;
1194         } else {
1195                 unsigned long flags;
1196                 spin_lock_irqsave(&fimc->slock, flags);
1197                 f->rect = sel->r;
1198                 /* Same crop rectangle on the source pad */
1199                 fimc->out_frame.rect = sel->r;
1200                 set_bit(ST_FLITE_CONFIG, &fimc->state);
1201                 spin_unlock_irqrestore(&fimc->slock, flags);
1202         }
1203         mutex_unlock(&fimc->lock);
1204 
1205         v4l2_dbg(1, debug, sd, "%s: (%d,%d) %dx%d, f_w: %d, f_h: %d\n",
1206                  __func__, f->rect.left, f->rect.top, f->rect.width,
1207                  f->rect.height, f->f_width, f->f_height);
1208 
1209         return ret;
1210 }
1211 
1212 static int fimc_lite_subdev_s_stream(struct v4l2_subdev *sd, int on)
1213 {
1214         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1215         unsigned long flags;
1216         int ret;
1217 
1218         /*
1219          * Find sensor subdev linked to FIMC-LITE directly or through
1220          * MIPI-CSIS. This is required for configuration where FIMC-LITE
1221          * is used as a subdev only and feeds data internally to FIMC-IS.
1222          * The pipeline links are protected through entity.stream_count
1223          * so there is no need to take the media graph mutex here.
1224          */
1225         fimc->sensor = fimc_find_remote_sensor(&sd->entity);
1226 
1227         if (atomic_read(&fimc->out_path) != FIMC_IO_ISP)
1228                 return -ENOIOCTLCMD;
1229 
1230         mutex_lock(&fimc->lock);
1231         if (on) {
1232                 flite_hw_reset(fimc);
1233                 ret = fimc_lite_hw_init(fimc, true);
1234                 if (!ret) {
1235                         spin_lock_irqsave(&fimc->slock, flags);
1236                         flite_hw_capture_start(fimc);
1237                         spin_unlock_irqrestore(&fimc->slock, flags);
1238                 }
1239         } else {
1240                 set_bit(ST_FLITE_OFF, &fimc->state);
1241 
1242                 spin_lock_irqsave(&fimc->slock, flags);
1243                 flite_hw_capture_stop(fimc);
1244                 spin_unlock_irqrestore(&fimc->slock, flags);
1245 
1246                 ret = wait_event_timeout(fimc->irq_queue,
1247                                 !test_bit(ST_FLITE_OFF, &fimc->state),
1248                                 msecs_to_jiffies(200));
1249                 if (ret == 0)
1250                         v4l2_err(sd, "s_stream(0) timeout\n");
1251                 clear_bit(ST_FLITE_RUN, &fimc->state);
1252         }
1253 
1254         mutex_unlock(&fimc->lock);
1255         return ret;
1256 }
1257 
1258 static int fimc_lite_log_status(struct v4l2_subdev *sd)
1259 {
1260         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1261 
1262         flite_hw_dump_regs(fimc, __func__);
1263         return 0;
1264 }
1265 
1266 static int fimc_lite_subdev_registered(struct v4l2_subdev *sd)
1267 {
1268         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1269         struct vb2_queue *q = &fimc->vb_queue;
1270         struct video_device *vfd = &fimc->ve.vdev;
1271         int ret;
1272 
1273         memset(vfd, 0, sizeof(*vfd));
1274         atomic_set(&fimc->out_path, FIMC_IO_DMA);
1275 
1276         snprintf(vfd->name, sizeof(vfd->name), "fimc-lite.%d.capture",
1277                  fimc->index);
1278 
1279         vfd->fops = &fimc_lite_fops;
1280         vfd->ioctl_ops = &fimc_lite_ioctl_ops;
1281         vfd->v4l2_dev = sd->v4l2_dev;
1282         vfd->minor = -1;
1283         vfd->release = video_device_release_empty;
1284         vfd->queue = q;
1285         fimc->reqbufs_count = 0;
1286 
1287         INIT_LIST_HEAD(&fimc->pending_buf_q);
1288         INIT_LIST_HEAD(&fimc->active_buf_q);
1289 
1290         memset(q, 0, sizeof(*q));
1291         q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
1292         q->io_modes = VB2_MMAP | VB2_USERPTR;
1293         q->ops = &fimc_lite_qops;
1294         q->mem_ops = &vb2_dma_contig_memops;
1295         q->buf_struct_size = sizeof(struct flite_buffer);
1296         q->drv_priv = fimc;
1297         q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1298         q->lock = &fimc->lock;
1299         q->dev = &fimc->pdev->dev;
1300 
1301         ret = vb2_queue_init(q);
1302         if (ret < 0)
1303                 return ret;
1304 
1305         fimc->vd_pad.flags = MEDIA_PAD_FL_SINK;
1306         ret = media_entity_pads_init(&vfd->entity, 1, &fimc->vd_pad);
1307         if (ret < 0)
1308                 return ret;
1309 
1310         video_set_drvdata(vfd, fimc);
1311         fimc->ve.pipe = v4l2_get_subdev_hostdata(sd);
1312 
1313         ret = video_register_device(vfd, VFL_TYPE_GRABBER, -1);
1314         if (ret < 0) {
1315                 media_entity_cleanup(&vfd->entity);
1316                 fimc->ve.pipe = NULL;
1317                 return ret;
1318         }
1319 
1320         v4l2_info(sd->v4l2_dev, "Registered %s as /dev/%s\n",
1321                   vfd->name, video_device_node_name(vfd));
1322         return 0;
1323 }
1324 
1325 static void fimc_lite_subdev_unregistered(struct v4l2_subdev *sd)
1326 {
1327         struct fimc_lite *fimc = v4l2_get_subdevdata(sd);
1328 
1329         if (fimc == NULL)
1330                 return;
1331 
1332         mutex_lock(&fimc->lock);
1333 
1334         if (video_is_registered(&fimc->ve.vdev)) {
1335                 video_unregister_device(&fimc->ve.vdev);
1336                 media_entity_cleanup(&fimc->ve.vdev.entity);
1337                 fimc->ve.pipe = NULL;
1338         }
1339 
1340         mutex_unlock(&fimc->lock);
1341 }
1342 
1343 static const struct v4l2_subdev_internal_ops fimc_lite_subdev_internal_ops = {
1344         .registered = fimc_lite_subdev_registered,
1345         .unregistered = fimc_lite_subdev_unregistered,
1346 };
1347 
1348 static const struct v4l2_subdev_pad_ops fimc_lite_subdev_pad_ops = {
1349         .enum_mbus_code = fimc_lite_subdev_enum_mbus_code,
1350         .get_selection = fimc_lite_subdev_get_selection,
1351         .set_selection = fimc_lite_subdev_set_selection,
1352         .get_fmt = fimc_lite_subdev_get_fmt,
1353         .set_fmt = fimc_lite_subdev_set_fmt,
1354 };
1355 
1356 static const struct v4l2_subdev_video_ops fimc_lite_subdev_video_ops = {
1357         .s_stream = fimc_lite_subdev_s_stream,
1358 };
1359 
1360 static const struct v4l2_subdev_core_ops fimc_lite_core_ops = {
1361         .log_status = fimc_lite_log_status,
1362 };
1363 
1364 static struct v4l2_subdev_ops fimc_lite_subdev_ops = {
1365         .core = &fimc_lite_core_ops,
1366         .video = &fimc_lite_subdev_video_ops,
1367         .pad = &fimc_lite_subdev_pad_ops,
1368 };
1369 
1370 static int fimc_lite_s_ctrl(struct v4l2_ctrl *ctrl)
1371 {
1372         struct fimc_lite *fimc = container_of(ctrl->handler, struct fimc_lite,
1373                                               ctrl_handler);
1374         set_bit(ST_FLITE_CONFIG, &fimc->state);
1375         return 0;
1376 }
1377 
1378 static const struct v4l2_ctrl_ops fimc_lite_ctrl_ops = {
1379         .s_ctrl = fimc_lite_s_ctrl,
1380 };
1381 
1382 static const struct v4l2_ctrl_config fimc_lite_ctrl = {
1383         .ops    = &fimc_lite_ctrl_ops,
1384         .id     = V4L2_CTRL_CLASS_USER | 0x1001,
1385         .type   = V4L2_CTRL_TYPE_BOOLEAN,
1386         .name   = "Test Pattern 640x480",
1387         .step   = 1,
1388 };
1389 
1390 static void fimc_lite_set_default_config(struct fimc_lite *fimc)
1391 {
1392         struct flite_frame *sink = &fimc->inp_frame;
1393         struct flite_frame *source = &fimc->out_frame;
1394 
1395         sink->fmt = &fimc_lite_formats[0];
1396         sink->f_width = FLITE_DEFAULT_WIDTH;
1397         sink->f_height = FLITE_DEFAULT_HEIGHT;
1398 
1399         sink->rect.width = FLITE_DEFAULT_WIDTH;
1400         sink->rect.height = FLITE_DEFAULT_HEIGHT;
1401         sink->rect.left = 0;
1402         sink->rect.top = 0;
1403 
1404         *source = *sink;
1405 }
1406 
1407 static int fimc_lite_create_capture_subdev(struct fimc_lite *fimc)
1408 {
1409         struct v4l2_ctrl_handler *handler = &fimc->ctrl_handler;
1410         struct v4l2_subdev *sd = &fimc->subdev;
1411         int ret;
1412 
1413         v4l2_subdev_init(sd, &fimc_lite_subdev_ops);
1414         sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
1415         snprintf(sd->name, sizeof(sd->name), "FIMC-LITE.%d", fimc->index);
1416 
1417         fimc->subdev_pads[FLITE_SD_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
1418         fimc->subdev_pads[FLITE_SD_PAD_SOURCE_DMA].flags = MEDIA_PAD_FL_SOURCE;
1419         fimc->subdev_pads[FLITE_SD_PAD_SOURCE_ISP].flags = MEDIA_PAD_FL_SOURCE;
1420         ret = media_entity_pads_init(&sd->entity, FLITE_SD_PADS_NUM,
1421                                 fimc->subdev_pads);
1422         if (ret)
1423                 return ret;
1424 
1425         v4l2_ctrl_handler_init(handler, 1);
1426         fimc->test_pattern = v4l2_ctrl_new_custom(handler, &fimc_lite_ctrl,
1427                                                   NULL);
1428         if (handler->error) {
1429                 media_entity_cleanup(&sd->entity);
1430                 return handler->error;
1431         }
1432 
1433         sd->ctrl_handler = handler;
1434         sd->internal_ops = &fimc_lite_subdev_internal_ops;
1435         sd->entity.function = MEDIA_ENT_F_PROC_VIDEO_SCALER;
1436         sd->entity.ops = &fimc_lite_subdev_media_ops;
1437         sd->owner = THIS_MODULE;
1438         v4l2_set_subdevdata(sd, fimc);
1439 
1440         return 0;
1441 }
1442 
1443 static void fimc_lite_unregister_capture_subdev(struct fimc_lite *fimc)
1444 {
1445         struct v4l2_subdev *sd = &fimc->subdev;
1446 
1447         v4l2_device_unregister_subdev(sd);
1448         media_entity_cleanup(&sd->entity);
1449         v4l2_ctrl_handler_free(&fimc->ctrl_handler);
1450         v4l2_set_subdevdata(sd, NULL);
1451 }
1452 
1453 static void fimc_lite_clk_put(struct fimc_lite *fimc)
1454 {
1455         if (IS_ERR(fimc->clock))
1456                 return;
1457 
1458         clk_put(fimc->clock);
1459         fimc->clock = ERR_PTR(-EINVAL);
1460 }
1461 
1462 static int fimc_lite_clk_get(struct fimc_lite *fimc)
1463 {
1464         fimc->clock = clk_get(&fimc->pdev->dev, FLITE_CLK_NAME);
1465         if (IS_ERR(fimc->clock))
1466                 return PTR_ERR(fimc->clock);
1467 
1468         return 0;
1469 }
1470 
1471 static const struct of_device_id flite_of_match[];
1472 
1473 static int fimc_lite_probe(struct platform_device *pdev)
1474 {
1475         struct flite_drvdata *drv_data = NULL;
1476         struct device *dev = &pdev->dev;
1477         const struct of_device_id *of_id;
1478         struct fimc_lite *fimc;
1479         struct resource *res;
1480         int ret;
1481 
1482         if (!dev->of_node)
1483                 return -ENODEV;
1484 
1485         fimc = devm_kzalloc(dev, sizeof(*fimc), GFP_KERNEL);
1486         if (!fimc)
1487                 return -ENOMEM;
1488 
1489         of_id = of_match_node(flite_of_match, dev->of_node);
1490         if (of_id)
1491                 drv_data = (struct flite_drvdata *)of_id->data;
1492         fimc->index = of_alias_get_id(dev->of_node, "fimc-lite");
1493 
1494         if (!drv_data || fimc->index >= drv_data->num_instances ||
1495                                                 fimc->index < 0) {
1496                 dev_err(dev, "Wrong %s node alias\n",
1497                                         dev->of_node->full_name);
1498                 return -EINVAL;
1499         }
1500 
1501         fimc->dd = drv_data;
1502         fimc->pdev = pdev;
1503 
1504         init_waitqueue_head(&fimc->irq_queue);
1505         spin_lock_init(&fimc->slock);
1506         mutex_init(&fimc->lock);
1507 
1508         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1509         fimc->regs = devm_ioremap_resource(dev, res);
1510         if (IS_ERR(fimc->regs))
1511                 return PTR_ERR(fimc->regs);
1512 
1513         res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1514         if (res == NULL) {
1515                 dev_err(dev, "Failed to get IRQ resource\n");
1516                 return -ENXIO;
1517         }
1518 
1519         ret = fimc_lite_clk_get(fimc);
1520         if (ret)
1521                 return ret;
1522 
1523         ret = devm_request_irq(dev, res->start, flite_irq_handler,
1524                                0, dev_name(dev), fimc);
1525         if (ret) {
1526                 dev_err(dev, "Failed to install irq (%d)\n", ret);
1527                 goto err_clk_put;
1528         }
1529 
1530         /* The video node will be created within the subdev's registered() op */
1531         ret = fimc_lite_create_capture_subdev(fimc);
1532         if (ret)
1533                 goto err_clk_put;
1534 
1535         platform_set_drvdata(pdev, fimc);
1536         pm_runtime_enable(dev);
1537 
1538         if (!pm_runtime_enabled(dev)) {
1539                 ret = clk_prepare_enable(fimc->clock);
1540                 if (ret < 0)
1541                         goto err_sd;
1542         }
1543 
1544         vb2_dma_contig_set_max_seg_size(dev, DMA_BIT_MASK(32));
1545 
1546         fimc_lite_set_default_config(fimc);
1547 
1548         dev_dbg(dev, "FIMC-LITE.%d registered successfully\n",
1549                 fimc->index);
1550         return 0;
1551 
1552 err_sd:
1553         fimc_lite_unregister_capture_subdev(fimc);
1554 err_clk_put:
1555         fimc_lite_clk_put(fimc);
1556         return ret;
1557 }
1558 
1559 #ifdef CONFIG_PM
1560 static int fimc_lite_runtime_resume(struct device *dev)
1561 {
1562         struct fimc_lite *fimc = dev_get_drvdata(dev);
1563 
1564         clk_prepare_enable(fimc->clock);
1565         return 0;
1566 }
1567 
1568 static int fimc_lite_runtime_suspend(struct device *dev)
1569 {
1570         struct fimc_lite *fimc = dev_get_drvdata(dev);
1571 
1572         clk_disable_unprepare(fimc->clock);
1573         return 0;
1574 }
1575 #endif
1576 
1577 #ifdef CONFIG_PM_SLEEP
1578 static int fimc_lite_resume(struct device *dev)
1579 {
1580         struct fimc_lite *fimc = dev_get_drvdata(dev);
1581         struct flite_buffer *buf;
1582         unsigned long flags;
1583         int i;
1584 
1585         spin_lock_irqsave(&fimc->slock, flags);
1586         if (!test_and_clear_bit(ST_LPM, &fimc->state) ||
1587             !test_bit(ST_FLITE_IN_USE, &fimc->state)) {
1588                 spin_unlock_irqrestore(&fimc->slock, flags);
1589                 return 0;
1590         }
1591         flite_hw_reset(fimc);
1592         spin_unlock_irqrestore(&fimc->slock, flags);
1593 
1594         if (!test_and_clear_bit(ST_FLITE_SUSPENDED, &fimc->state))
1595                 return 0;
1596 
1597         INIT_LIST_HEAD(&fimc->active_buf_q);
1598         fimc_pipeline_call(&fimc->ve, open,
1599                            &fimc->ve.vdev.entity, false);
1600         fimc_lite_hw_init(fimc, atomic_read(&fimc->out_path) == FIMC_IO_ISP);
1601         clear_bit(ST_FLITE_SUSPENDED, &fimc->state);
1602 
1603         for (i = 0; i < fimc->reqbufs_count; i++) {
1604                 if (list_empty(&fimc->pending_buf_q))
1605                         break;
1606                 buf = fimc_lite_pending_queue_pop(fimc);
1607                 buffer_queue(&buf->vb.vb2_buf);
1608         }
1609         return 0;
1610 }
1611 
1612 static int fimc_lite_suspend(struct device *dev)
1613 {
1614         struct fimc_lite *fimc = dev_get_drvdata(dev);
1615         bool suspend = test_bit(ST_FLITE_IN_USE, &fimc->state);
1616         int ret;
1617 
1618         if (test_and_set_bit(ST_LPM, &fimc->state))
1619                 return 0;
1620 
1621         ret = fimc_lite_stop_capture(fimc, suspend);
1622         if (ret < 0 || !fimc_lite_active(fimc))
1623                 return ret;
1624 
1625         return fimc_pipeline_call(&fimc->ve, close);
1626 }
1627 #endif /* CONFIG_PM_SLEEP */
1628 
1629 static int fimc_lite_remove(struct platform_device *pdev)
1630 {
1631         struct fimc_lite *fimc = platform_get_drvdata(pdev);
1632         struct device *dev = &pdev->dev;
1633 
1634         pm_runtime_disable(dev);
1635         pm_runtime_set_suspended(dev);
1636         fimc_lite_unregister_capture_subdev(fimc);
1637         vb2_dma_contig_clear_max_seg_size(dev);
1638         fimc_lite_clk_put(fimc);
1639 
1640         dev_info(dev, "Driver unloaded\n");
1641         return 0;
1642 }
1643 
1644 static const struct dev_pm_ops fimc_lite_pm_ops = {
1645         SET_SYSTEM_SLEEP_PM_OPS(fimc_lite_suspend, fimc_lite_resume)
1646         SET_RUNTIME_PM_OPS(fimc_lite_runtime_suspend, fimc_lite_runtime_resume,
1647                            NULL)
1648 };
1649 
1650 /* EXYNOS4212, EXYNOS4412 */
1651 static struct flite_drvdata fimc_lite_drvdata_exynos4 = {
1652         .max_width              = 8192,
1653         .max_height             = 8192,
1654         .out_width_align        = 8,
1655         .win_hor_offs_align     = 2,
1656         .out_hor_offs_align     = 8,
1657         .max_dma_bufs           = 1,
1658         .num_instances          = 2,
1659 };
1660 
1661 /* EXYNOS5250 */
1662 static struct flite_drvdata fimc_lite_drvdata_exynos5 = {
1663         .max_width              = 8192,
1664         .max_height             = 8192,
1665         .out_width_align        = 8,
1666         .win_hor_offs_align     = 2,
1667         .out_hor_offs_align     = 8,
1668         .max_dma_bufs           = 32,
1669         .num_instances          = 3,
1670 };
1671 
1672 static const struct of_device_id flite_of_match[] = {
1673         {
1674                 .compatible = "samsung,exynos4212-fimc-lite",
1675                 .data = &fimc_lite_drvdata_exynos4,
1676         },
1677         {
1678                 .compatible = "samsung,exynos5250-fimc-lite",
1679                 .data = &fimc_lite_drvdata_exynos5,
1680         },
1681         { /* sentinel */ },
1682 };
1683 MODULE_DEVICE_TABLE(of, flite_of_match);
1684 
1685 static struct platform_driver fimc_lite_driver = {
1686         .probe          = fimc_lite_probe,
1687         .remove         = fimc_lite_remove,
1688         .driver = {
1689                 .of_match_table = flite_of_match,
1690                 .name           = FIMC_LITE_DRV_NAME,
1691                 .pm             = &fimc_lite_pm_ops,
1692         }
1693 };
1694 module_platform_driver(fimc_lite_driver);
1695 MODULE_LICENSE("GPL");
1696 MODULE_ALIAS("platform:" FIMC_LITE_DRV_NAME);
1697 

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