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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
[cris-mirror.git] / drivers / media / platform / exynos4-is / fimc-m2m.c
bloba19f8b164a47d460faac9c60ac8641cd70961ced
1 /*
2 * Samsung S5P/EXYNOS4 SoC series FIMC (video postprocessor) driver
3 *
4 * Copyright (C) 2012 - 2013 Samsung Electronics Co., Ltd.
5 * 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 as published
9 * by the Free Software Foundation, either version 2 of the License,
10 * or (at your option) any later version.
11 */
12
13 #include <linux/module.h>
14 #include <linux/kernel.h>
15 #include <linux/types.h>
16 #include <linux/errno.h>
17 #include <linux/bug.h>
18 #include <linux/interrupt.h>
19 #include <linux/device.h>
20 #include <linux/platform_device.h>
21 #include <linux/pm_runtime.h>
22 #include <linux/list.h>
23 #include <linux/io.h>
24 #include <linux/slab.h>
25 #include <linux/clk.h>
26 #include <media/v4l2-ioctl.h>
27 #include <media/videobuf2-v4l2.h>
28 #include <media/videobuf2-dma-contig.h>
29
30 #include "common.h"
31 #include "fimc-core.h"
32 #include "fimc-reg.h"
33 #include "media-dev.h"
34
35 static unsigned int get_m2m_fmt_flags(unsigned int stream_type)
36 {
37 if (stream_type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
38 return FMT_FLAGS_M2M_IN;
39 else
40 return FMT_FLAGS_M2M_OUT;
41 }
42
43 void fimc_m2m_job_finish(struct fimc_ctx *ctx, int vb_state)
44 {
45 struct vb2_v4l2_buffer *src_vb, *dst_vb;
46
47 if (!ctx || !ctx->fh.m2m_ctx)
48 return;
49
50 src_vb = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
51 dst_vb = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
52
53 if (src_vb)
54 v4l2_m2m_buf_done(src_vb, vb_state);
55 if (dst_vb)
56 v4l2_m2m_buf_done(dst_vb, vb_state);
57 if (src_vb && dst_vb)
58 v4l2_m2m_job_finish(ctx->fimc_dev->m2m.m2m_dev,
59 ctx->fh.m2m_ctx);
60 }
61
62 /* Complete the transaction which has been scheduled for execution. */
63 static void fimc_m2m_shutdown(struct fimc_ctx *ctx)
64 {
65 struct fimc_dev *fimc = ctx->fimc_dev;
66
67 if (!fimc_m2m_pending(fimc))
68 return;
69
70 fimc_ctx_state_set(FIMC_CTX_SHUT, ctx);
71
72 wait_event_timeout(fimc->irq_queue,
73 !fimc_ctx_state_is_set(FIMC_CTX_SHUT, ctx),
74 FIMC_SHUTDOWN_TIMEOUT);
75 }
76
77 static int start_streaming(struct vb2_queue *q, unsigned int count)
78 {
79 struct fimc_ctx *ctx = q->drv_priv;
80 int ret;
81
82 ret = pm_runtime_get_sync(&ctx->fimc_dev->pdev->dev);
83 return ret > 0 ? 0 : ret;
84 }
85
86 static void stop_streaming(struct vb2_queue *q)
87 {
88 struct fimc_ctx *ctx = q->drv_priv;
89
90
91 fimc_m2m_shutdown(ctx);
92 fimc_m2m_job_finish(ctx, VB2_BUF_STATE_ERROR);
93 pm_runtime_put(&ctx->fimc_dev->pdev->dev);
94 }
95
96 static void fimc_device_run(void *priv)
97 {
98 struct vb2_v4l2_buffer *src_vb, *dst_vb;
99 struct fimc_ctx *ctx = priv;
100 struct fimc_frame *sf, *df;
101 struct fimc_dev *fimc;
102 unsigned long flags;
103 int ret;
104
105 if (WARN(!ctx, "Null context\n"))
106 return;
107
108 fimc = ctx->fimc_dev;
109 spin_lock_irqsave(&fimc->slock, flags);
110
111 set_bit(ST_M2M_PEND, &fimc->state);
112 sf = &ctx->s_frame;
113 df = &ctx->d_frame;
114
115 if (ctx->state & FIMC_PARAMS) {
116 /* Prepare the DMA offsets for scaler */
117 fimc_prepare_dma_offset(ctx, sf);
118 fimc_prepare_dma_offset(ctx, df);
119 }
120
121 src_vb = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx);
122 ret = fimc_prepare_addr(ctx, &src_vb->vb2_buf, sf, &sf->paddr);
123 if (ret)
124 goto dma_unlock;
125
126 dst_vb = v4l2_m2m_next_dst_buf(ctx->fh.m2m_ctx);
127 ret = fimc_prepare_addr(ctx, &dst_vb->vb2_buf, df, &df->paddr);
128 if (ret)
129 goto dma_unlock;
130
131 dst_vb->vb2_buf.timestamp = src_vb->vb2_buf.timestamp;
132 dst_vb->flags &= ~V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
133 dst_vb->flags |=
134 src_vb->flags & V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
135
136 /* Reconfigure hardware if the context has changed. */
137 if (fimc->m2m.ctx != ctx) {
138 ctx->state |= FIMC_PARAMS;
139 fimc->m2m.ctx = ctx;
140 }
141
142 if (ctx->state & FIMC_PARAMS) {
143 fimc_set_yuv_order(ctx);
144 fimc_hw_set_input_path(ctx);
145 fimc_hw_set_in_dma(ctx);
146 ret = fimc_set_scaler_info(ctx);
147 if (ret)
148 goto dma_unlock;
149 fimc_hw_set_prescaler(ctx);
150 fimc_hw_set_mainscaler(ctx);
151 fimc_hw_set_target_format(ctx);
152 fimc_hw_set_rotation(ctx);
153 fimc_hw_set_effect(ctx);
154 fimc_hw_set_out_dma(ctx);
155 if (fimc->drv_data->alpha_color)
156 fimc_hw_set_rgb_alpha(ctx);
157 fimc_hw_set_output_path(ctx);
158 }
159 fimc_hw_set_input_addr(fimc, &sf->paddr);
160 fimc_hw_set_output_addr(fimc, &df->paddr, -1);
161
162 fimc_activate_capture(ctx);
163 ctx->state &= (FIMC_CTX_M2M | FIMC_CTX_CAP);
164 fimc_hw_activate_input_dma(fimc, true);
165
166 dma_unlock:
167 spin_unlock_irqrestore(&fimc->slock, flags);
168 }
169
170 static void fimc_job_abort(void *priv)
171 {
172 fimc_m2m_shutdown(priv);
173 }
174
175 static int fimc_queue_setup(struct vb2_queue *vq,
176 unsigned int *num_buffers, unsigned int *num_planes,
177 unsigned int sizes[], struct device *alloc_devs[])
178 {
179 struct fimc_ctx *ctx = vb2_get_drv_priv(vq);
180 struct fimc_frame *f;
181 int i;
182
183 f = ctx_get_frame(ctx, vq->type);
184 if (IS_ERR(f))
185 return PTR_ERR(f);
186 /*
187 * Return number of non-contiguous planes (plane buffers)
188 * depending on the configured color format.
189 */
190 if (!f->fmt)
191 return -EINVAL;
192
193 *num_planes = f->fmt->memplanes;
194 for (i = 0; i < f->fmt->memplanes; i++)
195 sizes[i] = f->payload[i];
196 return 0;
197 }
198
199 static int fimc_buf_prepare(struct vb2_buffer *vb)
200 {
201 struct fimc_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
202 struct fimc_frame *frame;
203 int i;
204
205 frame = ctx_get_frame(ctx, vb->vb2_queue->type);
206 if (IS_ERR(frame))
207 return PTR_ERR(frame);
208
209 for (i = 0; i < frame->fmt->memplanes; i++)
210 vb2_set_plane_payload(vb, i, frame->payload[i]);
211
212 return 0;
213 }
214
215 static void fimc_buf_queue(struct vb2_buffer *vb)
216 {
217 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
218 struct fimc_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
219 v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
220 }
221
222 static const struct vb2_ops fimc_qops = {
223 .queue_setup = fimc_queue_setup,
224 .buf_prepare = fimc_buf_prepare,
225 .buf_queue = fimc_buf_queue,
226 .wait_prepare = vb2_ops_wait_prepare,
227 .wait_finish = vb2_ops_wait_finish,
228 .stop_streaming = stop_streaming,
229 .start_streaming = start_streaming,
230 };
231
232 /*
233 * V4L2 ioctl handlers
234 */
235 static int fimc_m2m_querycap(struct file *file, void *fh,
236 struct v4l2_capability *cap)
237 {
238 struct fimc_dev *fimc = video_drvdata(file);
239 unsigned int caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_M2M_MPLANE;
240
241 __fimc_vidioc_querycap(&fimc->pdev->dev, cap, caps);
242 return 0;
243 }
244
245 static int fimc_m2m_enum_fmt_mplane(struct file *file, void *priv,
246 struct v4l2_fmtdesc *f)
247 {
248 struct fimc_fmt *fmt;
249
250 fmt = fimc_find_format(NULL, NULL, get_m2m_fmt_flags(f->type),
251 f->index);
252 if (!fmt)
253 return -EINVAL;
254
255 strncpy(f->description, fmt->name, sizeof(f->description) - 1);
256 f->pixelformat = fmt->fourcc;
257 return 0;
258 }
259
260 static int fimc_m2m_g_fmt_mplane(struct file *file, void *fh,
261 struct v4l2_format *f)
262 {
263 struct fimc_ctx *ctx = fh_to_ctx(fh);
264 struct fimc_frame *frame = ctx_get_frame(ctx, f->type);
265
266 if (IS_ERR(frame))
267 return PTR_ERR(frame);
268
269 __fimc_get_format(frame, f);
270 return 0;
271 }
272
273 static int fimc_try_fmt_mplane(struct fimc_ctx *ctx, struct v4l2_format *f)
274 {
275 struct fimc_dev *fimc = ctx->fimc_dev;
276 const struct fimc_variant *variant = fimc->variant;
277 struct v4l2_pix_format_mplane *pix = &f->fmt.pix_mp;
278 struct fimc_fmt *fmt;
279 u32 max_w, mod_x, mod_y;
280
281 if (!IS_M2M(f->type))
282 return -EINVAL;
283
284 fmt = fimc_find_format(&pix->pixelformat, NULL,
285 get_m2m_fmt_flags(f->type), 0);
286 if (WARN(fmt == NULL, "Pixel format lookup failed"))
287 return -EINVAL;
288
289 if (pix->field == V4L2_FIELD_ANY)
290 pix->field = V4L2_FIELD_NONE;
291 else if (pix->field != V4L2_FIELD_NONE)
292 return -EINVAL;
293
294 if (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
295 max_w = variant->pix_limit->scaler_dis_w;
296 mod_x = ffs(variant->min_inp_pixsize) - 1;
297 } else {
298 max_w = variant->pix_limit->out_rot_dis_w;
299 mod_x = ffs(variant->min_out_pixsize) - 1;
300 }
301
302 if (tiled_fmt(fmt)) {
303 mod_x = 6; /* 64 x 32 pixels tile */
304 mod_y = 5;
305 } else {
306 if (variant->min_vsize_align == 1)
307 mod_y = fimc_fmt_is_rgb(fmt->color) ? 0 : 1;
308 else
309 mod_y = ffs(variant->min_vsize_align) - 1;
310 }
311
312 v4l_bound_align_image(&pix->width, 16, max_w, mod_x,
313 &pix->height, 8, variant->pix_limit->scaler_dis_w, mod_y, 0);
314
315 fimc_adjust_mplane_format(fmt, pix->width, pix->height, &f->fmt.pix_mp);
316 return 0;
317 }
318
319 static int fimc_m2m_try_fmt_mplane(struct file *file, void *fh,
320 struct v4l2_format *f)
321 {
322 struct fimc_ctx *ctx = fh_to_ctx(fh);
323 return fimc_try_fmt_mplane(ctx, f);
324 }
325
326 static void __set_frame_format(struct fimc_frame *frame, struct fimc_fmt *fmt,
327 struct v4l2_pix_format_mplane *pixm)
328 {
329 int i;
330
331 for (i = 0; i < fmt->memplanes; i++) {
332 frame->bytesperline[i] = pixm->plane_fmt[i].bytesperline;
333 frame->payload[i] = pixm->plane_fmt[i].sizeimage;
334 }
335
336 frame->f_width = pixm->width;
337 frame->f_height = pixm->height;
338 frame->o_width = pixm->width;
339 frame->o_height = pixm->height;
340 frame->width = pixm->width;
341 frame->height = pixm->height;
342 frame->offs_h = 0;
343 frame->offs_v = 0;
344 frame->fmt = fmt;
345 }
346
347 static int fimc_m2m_s_fmt_mplane(struct file *file, void *fh,
348 struct v4l2_format *f)
349 {
350 struct fimc_ctx *ctx = fh_to_ctx(fh);
351 struct fimc_dev *fimc = ctx->fimc_dev;
352 struct fimc_fmt *fmt;
353 struct vb2_queue *vq;
354 struct fimc_frame *frame;
355 int ret;
356
357 ret = fimc_try_fmt_mplane(ctx, f);
358 if (ret)
359 return ret;
360
361 vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
362
363 if (vb2_is_busy(vq)) {
364 v4l2_err(&fimc->m2m.vfd, "queue (%d) busy\n", f->type);
365 return -EBUSY;
366 }
367
368 if (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
369 frame = &ctx->s_frame;
370 else
371 frame = &ctx->d_frame;
372
373 fmt = fimc_find_format(&f->fmt.pix_mp.pixelformat, NULL,
374 get_m2m_fmt_flags(f->type), 0);
375 if (!fmt)
376 return -EINVAL;
377
378 __set_frame_format(frame, fmt, &f->fmt.pix_mp);
379
380 /* Update RGB Alpha control state and value range */
381 fimc_alpha_ctrl_update(ctx);
382
383 return 0;
384 }
385
386 static int fimc_m2m_cropcap(struct file *file, void *fh,
387 struct v4l2_cropcap *cr)
388 {
389 struct fimc_ctx *ctx = fh_to_ctx(fh);
390 struct fimc_frame *frame;
391
392 frame = ctx_get_frame(ctx, cr->type);
393 if (IS_ERR(frame))
394 return PTR_ERR(frame);
395
396 cr->bounds.left = 0;
397 cr->bounds.top = 0;
398 cr->bounds.width = frame->o_width;
399 cr->bounds.height = frame->o_height;
400 cr->defrect = cr->bounds;
401
402 return 0;
403 }
404
405 static int fimc_m2m_g_crop(struct file *file, void *fh, struct v4l2_crop *cr)
406 {
407 struct fimc_ctx *ctx = fh_to_ctx(fh);
408 struct fimc_frame *frame;
409
410 frame = ctx_get_frame(ctx, cr->type);
411 if (IS_ERR(frame))
412 return PTR_ERR(frame);
413
414 cr->c.left = frame->offs_h;
415 cr->c.top = frame->offs_v;
416 cr->c.width = frame->width;
417 cr->c.height = frame->height;
418
419 return 0;
420 }
421
422 static int fimc_m2m_try_crop(struct fimc_ctx *ctx, struct v4l2_crop *cr)
423 {
424 struct fimc_dev *fimc = ctx->fimc_dev;
425 struct fimc_frame *f;
426 u32 min_size, halign, depth = 0;
427 int i;
428
429 if (cr->c.top < 0 || cr->c.left < 0) {
430 v4l2_err(&fimc->m2m.vfd,
431 "doesn't support negative values for top & left\n");
432 return -EINVAL;
433 }
434 if (cr->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
435 f = &ctx->d_frame;
436 else if (cr->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
437 f = &ctx->s_frame;
438 else
439 return -EINVAL;
440
441 min_size = (f == &ctx->s_frame) ?
442 fimc->variant->min_inp_pixsize : fimc->variant->min_out_pixsize;
443
444 /* Get pixel alignment constraints. */
445 if (fimc->variant->min_vsize_align == 1)
446 halign = fimc_fmt_is_rgb(f->fmt->color) ? 0 : 1;
447 else
448 halign = ffs(fimc->variant->min_vsize_align) - 1;
449
450 for (i = 0; i < f->fmt->memplanes; i++)
451 depth += f->fmt->depth[i];
452
453 v4l_bound_align_image(&cr->c.width, min_size, f->o_width,
454 ffs(min_size) - 1,
455 &cr->c.height, min_size, f->o_height,
456 halign, 64/(ALIGN(depth, 8)));
457
458 /* adjust left/top if cropping rectangle is out of bounds */
459 if (cr->c.left + cr->c.width > f->o_width)
460 cr->c.left = f->o_width - cr->c.width;
461 if (cr->c.top + cr->c.height > f->o_height)
462 cr->c.top = f->o_height - cr->c.height;
463
464 cr->c.left = round_down(cr->c.left, min_size);
465 cr->c.top = round_down(cr->c.top, fimc->variant->hor_offs_align);
466
467 dbg("l:%d, t:%d, w:%d, h:%d, f_w: %d, f_h: %d",
468 cr->c.left, cr->c.top, cr->c.width, cr->c.height,
469 f->f_width, f->f_height);
470
471 return 0;
472 }
473
474 static int fimc_m2m_s_crop(struct file *file, void *fh, const struct v4l2_crop *crop)
475 {
476 struct fimc_ctx *ctx = fh_to_ctx(fh);
477 struct fimc_dev *fimc = ctx->fimc_dev;
478 struct v4l2_crop cr = *crop;
479 struct fimc_frame *f;
480 int ret;
481
482 ret = fimc_m2m_try_crop(ctx, &cr);
483 if (ret)
484 return ret;
485
486 f = (cr.type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) ?
487 &ctx->s_frame : &ctx->d_frame;
488
489 /* Check to see if scaling ratio is within supported range */
490 if (cr.type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
491 ret = fimc_check_scaler_ratio(ctx, cr.c.width,
492 cr.c.height, ctx->d_frame.width,
493 ctx->d_frame.height, ctx->rotation);
494 } else {
495 ret = fimc_check_scaler_ratio(ctx, ctx->s_frame.width,
496 ctx->s_frame.height, cr.c.width,
497 cr.c.height, ctx->rotation);
498 }
499 if (ret) {
500 v4l2_err(&fimc->m2m.vfd, "Out of scaler range\n");
501 return -EINVAL;
502 }
503
504 f->offs_h = cr.c.left;
505 f->offs_v = cr.c.top;
506 f->width = cr.c.width;
507 f->height = cr.c.height;
508
509 fimc_ctx_state_set(FIMC_PARAMS, ctx);
510
511 return 0;
512 }
513
514 static const struct v4l2_ioctl_ops fimc_m2m_ioctl_ops = {
515 .vidioc_querycap = fimc_m2m_querycap,
516 .vidioc_enum_fmt_vid_cap_mplane = fimc_m2m_enum_fmt_mplane,
517 .vidioc_enum_fmt_vid_out_mplane = fimc_m2m_enum_fmt_mplane,
518 .vidioc_g_fmt_vid_cap_mplane = fimc_m2m_g_fmt_mplane,
519 .vidioc_g_fmt_vid_out_mplane = fimc_m2m_g_fmt_mplane,
520 .vidioc_try_fmt_vid_cap_mplane = fimc_m2m_try_fmt_mplane,
521 .vidioc_try_fmt_vid_out_mplane = fimc_m2m_try_fmt_mplane,
522 .vidioc_s_fmt_vid_cap_mplane = fimc_m2m_s_fmt_mplane,
523 .vidioc_s_fmt_vid_out_mplane = fimc_m2m_s_fmt_mplane,
524 .vidioc_reqbufs = v4l2_m2m_ioctl_reqbufs,
525 .vidioc_querybuf = v4l2_m2m_ioctl_querybuf,
526 .vidioc_qbuf = v4l2_m2m_ioctl_qbuf,
527 .vidioc_dqbuf = v4l2_m2m_ioctl_dqbuf,
528 .vidioc_expbuf = v4l2_m2m_ioctl_expbuf,
529 .vidioc_streamon = v4l2_m2m_ioctl_streamon,
530 .vidioc_streamoff = v4l2_m2m_ioctl_streamoff,
531 .vidioc_g_crop = fimc_m2m_g_crop,
532 .vidioc_s_crop = fimc_m2m_s_crop,
533 .vidioc_cropcap = fimc_m2m_cropcap
534
535 };
536
537 static int queue_init(void *priv, struct vb2_queue *src_vq,
538 struct vb2_queue *dst_vq)
539 {
540 struct fimc_ctx *ctx = priv;
541 int ret;
542
543 src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
544 src_vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
545 src_vq->drv_priv = ctx;
546 src_vq->ops = &fimc_qops;
547 src_vq->mem_ops = &vb2_dma_contig_memops;
548 src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
549 src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
550 src_vq->lock = &ctx->fimc_dev->lock;
551 src_vq->dev = &ctx->fimc_dev->pdev->dev;
552
553 ret = vb2_queue_init(src_vq);
554 if (ret)
555 return ret;
556
557 dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
558 dst_vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
559 dst_vq->drv_priv = ctx;
560 dst_vq->ops = &fimc_qops;
561 dst_vq->mem_ops = &vb2_dma_contig_memops;
562 dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
563 dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
564 dst_vq->lock = &ctx->fimc_dev->lock;
565 dst_vq->dev = &ctx->fimc_dev->pdev->dev;
566
567 return vb2_queue_init(dst_vq);
568 }
569
570 static int fimc_m2m_set_default_format(struct fimc_ctx *ctx)
571 {
572 struct v4l2_pix_format_mplane pixm = {
573 .pixelformat = V4L2_PIX_FMT_RGB32,
574 .width = 800,
575 .height = 600,
576 .plane_fmt[0] = {
577 .bytesperline = 800 * 4,
578 .sizeimage = 800 * 4 * 600,
579 },
580 };
581 struct fimc_fmt *fmt;
582
583 fmt = fimc_find_format(&pixm.pixelformat, NULL, FMT_FLAGS_M2M, 0);
584 if (!fmt)
585 return -EINVAL;
586
587 __set_frame_format(&ctx->s_frame, fmt, &pixm);
588 __set_frame_format(&ctx->d_frame, fmt, &pixm);
589
590 return 0;
591 }
592
593 static int fimc_m2m_open(struct file *file)
594 {
595 struct fimc_dev *fimc = video_drvdata(file);
596 struct fimc_ctx *ctx;
597 int ret = -EBUSY;
598
599 pr_debug("pid: %d, state: %#lx\n", task_pid_nr(current), fimc->state);
600
601 if (mutex_lock_interruptible(&fimc->lock))
602 return -ERESTARTSYS;
603 /*
604 * Don't allow simultaneous open() of the mem-to-mem and the
605 * capture video node that belong to same FIMC IP instance.
606 */
607 if (test_bit(ST_CAPT_BUSY, &fimc->state))
608 goto unlock;
609
610 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
611 if (!ctx) {
612 ret = -ENOMEM;
613 goto unlock;
614 }
615 v4l2_fh_init(&ctx->fh, &fimc->m2m.vfd);
616 ctx->fimc_dev = fimc;
617
618 /* Default color format */
619 ctx->s_frame.fmt = fimc_get_format(0);
620 ctx->d_frame.fmt = fimc_get_format(0);
621
622 ret = fimc_ctrls_create(ctx);
623 if (ret)
624 goto error_fh;
625
626 /* Use separate control handler per file handle */
627 ctx->fh.ctrl_handler = &ctx->ctrls.handler;
628 file->private_data = &ctx->fh;
629 v4l2_fh_add(&ctx->fh);
630
631 /* Setup the device context for memory-to-memory mode */
632 ctx->state = FIMC_CTX_M2M;
633 ctx->flags = 0;
634 ctx->in_path = FIMC_IO_DMA;
635 ctx->out_path = FIMC_IO_DMA;
636 ctx->scaler.enabled = 1;
637
638 ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(fimc->m2m.m2m_dev, ctx, queue_init);
639 if (IS_ERR(ctx->fh.m2m_ctx)) {
640 ret = PTR_ERR(ctx->fh.m2m_ctx);
641 goto error_c;
642 }
643
644 if (fimc->m2m.refcnt++ == 0)
645 set_bit(ST_M2M_RUN, &fimc->state);
646
647 ret = fimc_m2m_set_default_format(ctx);
648 if (ret < 0)
649 goto error_m2m_ctx;
650
651 mutex_unlock(&fimc->lock);
652 return 0;
653
654 error_m2m_ctx:
655 v4l2_m2m_ctx_release(ctx->fh.m2m_ctx);
656 error_c:
657 fimc_ctrls_delete(ctx);
658 v4l2_fh_del(&ctx->fh);
659 error_fh:
660 v4l2_fh_exit(&ctx->fh);
661 kfree(ctx);
662 unlock:
663 mutex_unlock(&fimc->lock);
664 return ret;
665 }
666
667 static int fimc_m2m_release(struct file *file)
668 {
669 struct fimc_ctx *ctx = fh_to_ctx(file->private_data);
670 struct fimc_dev *fimc = ctx->fimc_dev;
671
672 dbg("pid: %d, state: 0x%lx, refcnt= %d",
673 task_pid_nr(current), fimc->state, fimc->m2m.refcnt);
674
675 mutex_lock(&fimc->lock);
676
677 v4l2_m2m_ctx_release(ctx->fh.m2m_ctx);
678 fimc_ctrls_delete(ctx);
679 v4l2_fh_del(&ctx->fh);
680 v4l2_fh_exit(&ctx->fh);
681
682 if (--fimc->m2m.refcnt <= 0)
683 clear_bit(ST_M2M_RUN, &fimc->state);
684 kfree(ctx);
685
686 mutex_unlock(&fimc->lock);
687 return 0;
688 }
689
690 static const struct v4l2_file_operations fimc_m2m_fops = {
691 .owner = THIS_MODULE,
692 .open = fimc_m2m_open,
693 .release = fimc_m2m_release,
694 .poll = v4l2_m2m_fop_poll,
695 .unlocked_ioctl = video_ioctl2,
696 .mmap = v4l2_m2m_fop_mmap,
697 };
698
699 static const struct v4l2_m2m_ops m2m_ops = {
700 .device_run = fimc_device_run,
701 .job_abort = fimc_job_abort,
702 };
703
704 int fimc_register_m2m_device(struct fimc_dev *fimc,
705 struct v4l2_device *v4l2_dev)
706 {
707 struct video_device *vfd = &fimc->m2m.vfd;
708 int ret;
709
710 fimc->v4l2_dev = v4l2_dev;
711
712 memset(vfd, 0, sizeof(*vfd));
713 vfd->fops = &fimc_m2m_fops;
714 vfd->ioctl_ops = &fimc_m2m_ioctl_ops;
715 vfd->v4l2_dev = v4l2_dev;
716 vfd->minor = -1;
717 vfd->release = video_device_release_empty;
718 vfd->lock = &fimc->lock;
719 vfd->vfl_dir = VFL_DIR_M2M;
720
721 snprintf(vfd->name, sizeof(vfd->name), "fimc.%d.m2m", fimc->id);
722 video_set_drvdata(vfd, fimc);
723
724 fimc->m2m.m2m_dev = v4l2_m2m_init(&m2m_ops);
725 if (IS_ERR(fimc->m2m.m2m_dev)) {
726 v4l2_err(v4l2_dev, "failed to initialize v4l2-m2m device\n");
727 return PTR_ERR(fimc->m2m.m2m_dev);
728 }
729
730 ret = media_entity_pads_init(&vfd->entity, 0, NULL);
731 if (ret)
732 goto err_me;
733
734 ret = video_register_device(vfd, VFL_TYPE_GRABBER, -1);
735 if (ret)
736 goto err_vd;
737
738 v4l2_info(v4l2_dev, "Registered %s as /dev/%s\n",
739 vfd->name, video_device_node_name(vfd));
740 return 0;
741
742 err_vd:
743 media_entity_cleanup(&vfd->entity);
744 err_me:
745 v4l2_m2m_release(fimc->m2m.m2m_dev);
746 return ret;
747 }
748
749 void fimc_unregister_m2m_device(struct fimc_dev *fimc)
750 {
751 if (!fimc)
752 return;
753
754 if (fimc->m2m.m2m_dev)
755 v4l2_m2m_release(fimc->m2m.m2m_dev);
756
757 if (video_is_registered(&fimc->m2m.vfd)) {
758 video_unregister_device(&fimc->m2m.vfd);
759 media_entity_cleanup(&fimc->m2m.vfd.entity);
760 }
761 }
CRIS linux kernel tree