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1d21da4bd24be130dbcdd2b15032ff198390804a
[deliverable/linux.git] / drivers / media / platform / s5p-fimc / fimc-m2m.c
1 /*
2 * Samsung S5P/EXYNOS4 SoC series FIMC (video postprocessor) driver
3 *
4 * Copyright (C) 2012 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-core.h>
28 #include <media/videobuf2-dma-contig.h>
29
30 #include "fimc-core.h"
31 #include "fimc-reg.h"
32 #include "fimc-mdevice.h"
33
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_buffer *src_vb, *dst_vb;
46
47 if (!ctx || !ctx->m2m_ctx)
48 return;
49
50 src_vb = v4l2_m2m_src_buf_remove(ctx->m2m_ctx);
51 dst_vb = v4l2_m2m_dst_buf_remove(ctx->m2m_ctx);
52
53 if (src_vb && dst_vb) {
54 v4l2_m2m_buf_done(src_vb, vb_state);
55 v4l2_m2m_buf_done(dst_vb, vb_state);
56 v4l2_m2m_job_finish(ctx->fimc_dev->m2m.m2m_dev,
57 ctx->m2m_ctx);
58 }
59 }
60
61 /* Complete the transaction which has been scheduled for execution. */
62 static int fimc_m2m_shutdown(struct fimc_ctx *ctx)
63 {
64 struct fimc_dev *fimc = ctx->fimc_dev;
65 int ret;
66
67 if (!fimc_m2m_pending(fimc))
68 return 0;
69
70 fimc_ctx_state_set(FIMC_CTX_SHUT, ctx);
71
72 ret = wait_event_timeout(fimc->irq_queue,
73 !fimc_ctx_state_is_set(FIMC_CTX_SHUT, ctx),
74 FIMC_SHUTDOWN_TIMEOUT);
75
76 return ret == 0 ? -ETIMEDOUT : ret;
77 }
78
79 static int start_streaming(struct vb2_queue *q, unsigned int count)
80 {
81 struct fimc_ctx *ctx = q->drv_priv;
82 int ret;
83
84 ret = pm_runtime_get_sync(&ctx->fimc_dev->pdev->dev);
85 return ret > 0 ? 0 : ret;
86 }
87
88 static int stop_streaming(struct vb2_queue *q)
89 {
90 struct fimc_ctx *ctx = q->drv_priv;
91 int ret;
92
93 ret = fimc_m2m_shutdown(ctx);
94 if (ret == -ETIMEDOUT)
95 fimc_m2m_job_finish(ctx, VB2_BUF_STATE_ERROR);
96
97 pm_runtime_put(&ctx->fimc_dev->pdev->dev);
98 return 0;
99 }
100
101 static void fimc_device_run(void *priv)
102 {
103 struct vb2_buffer *vb = NULL;
104 struct fimc_ctx *ctx = priv;
105 struct fimc_frame *sf, *df;
106 struct fimc_dev *fimc;
107 unsigned long flags;
108 int ret;
109
110 if (WARN(!ctx, "Null context\n"))
111 return;
112
113 fimc = ctx->fimc_dev;
114 spin_lock_irqsave(&fimc->slock, flags);
115
116 set_bit(ST_M2M_PEND, &fimc->state);
117 sf = &ctx->s_frame;
118 df = &ctx->d_frame;
119
120 if (ctx->state & FIMC_PARAMS) {
121 /* Prepare the DMA offsets for scaler */
122 fimc_prepare_dma_offset(ctx, sf);
123 fimc_prepare_dma_offset(ctx, df);
124 }
125
126 vb = v4l2_m2m_next_src_buf(ctx->m2m_ctx);
127 ret = fimc_prepare_addr(ctx, vb, sf, &sf->paddr);
128 if (ret)
129 goto dma_unlock;
130
131 vb = v4l2_m2m_next_dst_buf(ctx->m2m_ctx);
132 ret = fimc_prepare_addr(ctx, vb, df, &df->paddr);
133 if (ret)
134 goto dma_unlock;
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->variant->has_alpha)
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_SRC_FMT | FIMC_DST_FMT);
165 fimc_hw_activate_input_dma(fimc, true);
166
167 dma_unlock:
168 spin_unlock_irqrestore(&fimc->slock, flags);
169 }
170
171 static void fimc_job_abort(void *priv)
172 {
173 fimc_m2m_shutdown(priv);
174 }
175
176 static int fimc_queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt,
177 unsigned int *num_buffers, unsigned int *num_planes,
178 unsigned int sizes[], void *allocators[])
179 {
180 struct fimc_ctx *ctx = vb2_get_drv_priv(vq);
181 struct fimc_frame *f;
182 int i;
183
184 f = ctx_get_frame(ctx, vq->type);
185 if (IS_ERR(f))
186 return PTR_ERR(f);
187 /*
188 * Return number of non-contigous planes (plane buffers)
189 * depending on the configured color format.
190 */
191 if (!f->fmt)
192 return -EINVAL;
193
194 *num_planes = f->fmt->memplanes;
195 for (i = 0; i < f->fmt->memplanes; i++) {
196 sizes[i] = (f->f_width * f->f_height * f->fmt->depth[i]) / 8;
197 allocators[i] = ctx->fimc_dev->alloc_ctx;
198 }
199 return 0;
200 }
201
202 static int fimc_buf_prepare(struct vb2_buffer *vb)
203 {
204 struct fimc_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
205 struct fimc_frame *frame;
206 int i;
207
208 frame = ctx_get_frame(ctx, vb->vb2_queue->type);
209 if (IS_ERR(frame))
210 return PTR_ERR(frame);
211
212 for (i = 0; i < frame->fmt->memplanes; i++)
213 vb2_set_plane_payload(vb, i, frame->payload[i]);
214
215 return 0;
216 }
217
218 static void fimc_buf_queue(struct vb2_buffer *vb)
219 {
220 struct fimc_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
221
222 dbg("ctx: %p, ctx->state: 0x%x", ctx, ctx->state);
223
224 if (ctx->m2m_ctx)
225 v4l2_m2m_buf_queue(ctx->m2m_ctx, vb);
226 }
227
228 static void fimc_lock(struct vb2_queue *vq)
229 {
230 struct fimc_ctx *ctx = vb2_get_drv_priv(vq);
231 mutex_lock(&ctx->fimc_dev->lock);
232 }
233
234 static void fimc_unlock(struct vb2_queue *vq)
235 {
236 struct fimc_ctx *ctx = vb2_get_drv_priv(vq);
237 mutex_unlock(&ctx->fimc_dev->lock);
238 }
239
240 static struct vb2_ops fimc_qops = {
241 .queue_setup = fimc_queue_setup,
242 .buf_prepare = fimc_buf_prepare,
243 .buf_queue = fimc_buf_queue,
244 .wait_prepare = fimc_unlock,
245 .wait_finish = fimc_lock,
246 .stop_streaming = stop_streaming,
247 .start_streaming = start_streaming,
248 };
249
250 /*
251 * V4L2 ioctl handlers
252 */
253 static int fimc_m2m_querycap(struct file *file, void *fh,
254 struct v4l2_capability *cap)
255 {
256 struct fimc_ctx *ctx = fh_to_ctx(fh);
257 struct fimc_dev *fimc = ctx->fimc_dev;
258
259 strncpy(cap->driver, fimc->pdev->name, sizeof(cap->driver) - 1);
260 strncpy(cap->card, fimc->pdev->name, sizeof(cap->card) - 1);
261 cap->bus_info[0] = 0;
262 /*
263 * This is only a mem-to-mem video device. The capture and output
264 * device capability flags are left only for backward compatibility
265 * and are scheduled for removal.
266 */
267 cap->capabilities = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_M2M_MPLANE |
268 V4L2_CAP_VIDEO_CAPTURE_MPLANE | V4L2_CAP_VIDEO_OUTPUT_MPLANE;
269
270 return 0;
271 }
272
273 static int fimc_m2m_enum_fmt_mplane(struct file *file, void *priv,
274 struct v4l2_fmtdesc *f)
275 {
276 struct fimc_fmt *fmt;
277
278 fmt = fimc_find_format(NULL, NULL, get_m2m_fmt_flags(f->type),
279 f->index);
280 if (!fmt)
281 return -EINVAL;
282
283 strncpy(f->description, fmt->name, sizeof(f->description) - 1);
284 f->pixelformat = fmt->fourcc;
285 return 0;
286 }
287
288 static int fimc_m2m_g_fmt_mplane(struct file *file, void *fh,
289 struct v4l2_format *f)
290 {
291 struct fimc_ctx *ctx = fh_to_ctx(fh);
292 struct fimc_frame *frame = ctx_get_frame(ctx, f->type);
293
294 if (IS_ERR(frame))
295 return PTR_ERR(frame);
296
297 return fimc_fill_format(frame, f);
298 }
299
300 static int fimc_try_fmt_mplane(struct fimc_ctx *ctx, struct v4l2_format *f)
301 {
302 struct fimc_dev *fimc = ctx->fimc_dev;
303 struct fimc_variant *variant = fimc->variant;
304 struct v4l2_pix_format_mplane *pix = &f->fmt.pix_mp;
305 struct fimc_fmt *fmt;
306 u32 max_w, mod_x, mod_y;
307
308 if (!IS_M2M(f->type))
309 return -EINVAL;
310
311 dbg("w: %d, h: %d", pix->width, pix->height);
312
313 fmt = fimc_find_format(&pix->pixelformat, NULL,
314 get_m2m_fmt_flags(f->type), 0);
315 if (WARN(fmt == NULL, "Pixel format lookup failed"))
316 return -EINVAL;
317
318 if (pix->field == V4L2_FIELD_ANY)
319 pix->field = V4L2_FIELD_NONE;
320 else if (pix->field != V4L2_FIELD_NONE)
321 return -EINVAL;
322
323 if (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
324 max_w = variant->pix_limit->scaler_dis_w;
325 mod_x = ffs(variant->min_inp_pixsize) - 1;
326 } else {
327 max_w = variant->pix_limit->out_rot_dis_w;
328 mod_x = ffs(variant->min_out_pixsize) - 1;
329 }
330
331 if (tiled_fmt(fmt)) {
332 mod_x = 6; /* 64 x 32 pixels tile */
333 mod_y = 5;
334 } else {
335 if (variant->min_vsize_align == 1)
336 mod_y = fimc_fmt_is_rgb(fmt->color) ? 0 : 1;
337 else
338 mod_y = ffs(variant->min_vsize_align) - 1;
339 }
340
341 v4l_bound_align_image(&pix->width, 16, max_w, mod_x,
342 &pix->height, 8, variant->pix_limit->scaler_dis_w, mod_y, 0);
343
344 fimc_adjust_mplane_format(fmt, pix->width, pix->height, &f->fmt.pix_mp);
345 return 0;
346 }
347
348 static int fimc_m2m_try_fmt_mplane(struct file *file, void *fh,
349 struct v4l2_format *f)
350 {
351 struct fimc_ctx *ctx = fh_to_ctx(fh);
352
353 return fimc_try_fmt_mplane(ctx, f);
354 }
355
356 static int fimc_m2m_s_fmt_mplane(struct file *file, void *fh,
357 struct v4l2_format *f)
358 {
359 struct fimc_ctx *ctx = fh_to_ctx(fh);
360 struct fimc_dev *fimc = ctx->fimc_dev;
361 struct vb2_queue *vq;
362 struct fimc_frame *frame;
363 struct v4l2_pix_format_mplane *pix;
364 int i, ret = 0;
365
366 ret = fimc_try_fmt_mplane(ctx, f);
367 if (ret)
368 return ret;
369
370 vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
371
372 if (vb2_is_busy(vq)) {
373 v4l2_err(&fimc->m2m.vfd, "queue (%d) busy\n", f->type);
374 return -EBUSY;
375 }
376
377 if (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
378 frame = &ctx->s_frame;
379 else
380 frame = &ctx->d_frame;
381
382 pix = &f->fmt.pix_mp;
383 frame->fmt = fimc_find_format(&pix->pixelformat, NULL,
384 get_m2m_fmt_flags(f->type), 0);
385 if (!frame->fmt)
386 return -EINVAL;
387
388 /* Update RGB Alpha control state and value range */
389 fimc_alpha_ctrl_update(ctx);
390
391 for (i = 0; i < frame->fmt->colplanes; i++) {
392 frame->payload[i] =
393 (pix->width * pix->height * frame->fmt->depth[i]) / 8;
394 }
395
396 fimc_fill_frame(frame, f);
397
398 ctx->scaler.enabled = 1;
399
400 if (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
401 fimc_ctx_state_set(FIMC_PARAMS | FIMC_DST_FMT, ctx);
402 else
403 fimc_ctx_state_set(FIMC_PARAMS | FIMC_SRC_FMT, ctx);
404
405 dbg("f_w: %d, f_h: %d", frame->f_width, frame->f_height);
406
407 return 0;
408 }
409
410 static int fimc_m2m_reqbufs(struct file *file, void *fh,
411 struct v4l2_requestbuffers *reqbufs)
412 {
413 struct fimc_ctx *ctx = fh_to_ctx(fh);
414
415 return v4l2_m2m_reqbufs(file, ctx->m2m_ctx, reqbufs);
416 }
417
418 static int fimc_m2m_querybuf(struct file *file, void *fh,
419 struct v4l2_buffer *buf)
420 {
421 struct fimc_ctx *ctx = fh_to_ctx(fh);
422
423 return v4l2_m2m_querybuf(file, ctx->m2m_ctx, buf);
424 }
425
426 static int fimc_m2m_qbuf(struct file *file, void *fh,
427 struct v4l2_buffer *buf)
428 {
429 struct fimc_ctx *ctx = fh_to_ctx(fh);
430
431 return v4l2_m2m_qbuf(file, ctx->m2m_ctx, buf);
432 }
433
434 static int fimc_m2m_dqbuf(struct file *file, void *fh,
435 struct v4l2_buffer *buf)
436 {
437 struct fimc_ctx *ctx = fh_to_ctx(fh);
438
439 return v4l2_m2m_dqbuf(file, ctx->m2m_ctx, buf);
440 }
441
442 static int fimc_m2m_expbuf(struct file *file, void *fh,
443 struct v4l2_exportbuffer *eb)
444 {
445 struct fimc_ctx *ctx = fh_to_ctx(fh);
446
447 return v4l2_m2m_expbuf(file, ctx->m2m_ctx, eb);
448 }
449
450
451 static int fimc_m2m_streamon(struct file *file, void *fh,
452 enum v4l2_buf_type type)
453 {
454 struct fimc_ctx *ctx = fh_to_ctx(fh);
455
456 /* The source and target color format need to be set */
457 if (V4L2_TYPE_IS_OUTPUT(type)) {
458 if (!fimc_ctx_state_is_set(FIMC_SRC_FMT, ctx))
459 return -EINVAL;
460 } else if (!fimc_ctx_state_is_set(FIMC_DST_FMT, ctx)) {
461 return -EINVAL;
462 }
463
464 return v4l2_m2m_streamon(file, ctx->m2m_ctx, type);
465 }
466
467 static int fimc_m2m_streamoff(struct file *file, void *fh,
468 enum v4l2_buf_type type)
469 {
470 struct fimc_ctx *ctx = fh_to_ctx(fh);
471
472 return v4l2_m2m_streamoff(file, ctx->m2m_ctx, type);
473 }
474
475 static int fimc_m2m_cropcap(struct file *file, void *fh,
476 struct v4l2_cropcap *cr)
477 {
478 struct fimc_ctx *ctx = fh_to_ctx(fh);
479 struct fimc_frame *frame;
480
481 frame = ctx_get_frame(ctx, cr->type);
482 if (IS_ERR(frame))
483 return PTR_ERR(frame);
484
485 cr->bounds.left = 0;
486 cr->bounds.top = 0;
487 cr->bounds.width = frame->o_width;
488 cr->bounds.height = frame->o_height;
489 cr->defrect = cr->bounds;
490
491 return 0;
492 }
493
494 static int fimc_m2m_g_crop(struct file *file, void *fh, struct v4l2_crop *cr)
495 {
496 struct fimc_ctx *ctx = fh_to_ctx(fh);
497 struct fimc_frame *frame;
498
499 frame = ctx_get_frame(ctx, cr->type);
500 if (IS_ERR(frame))
501 return PTR_ERR(frame);
502
503 cr->c.left = frame->offs_h;
504 cr->c.top = frame->offs_v;
505 cr->c.width = frame->width;
506 cr->c.height = frame->height;
507
508 return 0;
509 }
510
511 static int fimc_m2m_try_crop(struct fimc_ctx *ctx, struct v4l2_crop *cr)
512 {
513 struct fimc_dev *fimc = ctx->fimc_dev;
514 struct fimc_frame *f;
515 u32 min_size, halign, depth = 0;
516 int i;
517
518 if (cr->c.top < 0 || cr->c.left < 0) {
519 v4l2_err(&fimc->m2m.vfd,
520 "doesn't support negative values for top & left\n");
521 return -EINVAL;
522 }
523 if (cr->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
524 f = &ctx->d_frame;
525 else if (cr->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
526 f = &ctx->s_frame;
527 else
528 return -EINVAL;
529
530 min_size = (f == &ctx->s_frame) ?
531 fimc->variant->min_inp_pixsize : fimc->variant->min_out_pixsize;
532
533 /* Get pixel alignment constraints. */
534 if (fimc->variant->min_vsize_align == 1)
535 halign = fimc_fmt_is_rgb(f->fmt->color) ? 0 : 1;
536 else
537 halign = ffs(fimc->variant->min_vsize_align) - 1;
538
539 for (i = 0; i < f->fmt->colplanes; i++)
540 depth += f->fmt->depth[i];
541
542 v4l_bound_align_image(&cr->c.width, min_size, f->o_width,
543 ffs(min_size) - 1,
544 &cr->c.height, min_size, f->o_height,
545 halign, 64/(ALIGN(depth, 8)));
546
547 /* adjust left/top if cropping rectangle is out of bounds */
548 if (cr->c.left + cr->c.width > f->o_width)
549 cr->c.left = f->o_width - cr->c.width;
550 if (cr->c.top + cr->c.height > f->o_height)
551 cr->c.top = f->o_height - cr->c.height;
552
553 cr->c.left = round_down(cr->c.left, min_size);
554 cr->c.top = round_down(cr->c.top, fimc->variant->hor_offs_align);
555
556 dbg("l:%d, t:%d, w:%d, h:%d, f_w: %d, f_h: %d",
557 cr->c.left, cr->c.top, cr->c.width, cr->c.height,
558 f->f_width, f->f_height);
559
560 return 0;
561 }
562
563 static int fimc_m2m_s_crop(struct file *file, void *fh, const struct v4l2_crop *crop)
564 {
565 struct fimc_ctx *ctx = fh_to_ctx(fh);
566 struct fimc_dev *fimc = ctx->fimc_dev;
567 struct v4l2_crop cr = *crop;
568 struct fimc_frame *f;
569 int ret;
570
571 ret = fimc_m2m_try_crop(ctx, &cr);
572 if (ret)
573 return ret;
574
575 f = (cr.type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) ?
576 &ctx->s_frame : &ctx->d_frame;
577
578 /* Check to see if scaling ratio is within supported range */
579 if (fimc_ctx_state_is_set(FIMC_DST_FMT | FIMC_SRC_FMT, ctx)) {
580 if (cr.type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
581 ret = fimc_check_scaler_ratio(ctx, cr.c.width,
582 cr.c.height, ctx->d_frame.width,
583 ctx->d_frame.height, ctx->rotation);
584 } else {
585 ret = fimc_check_scaler_ratio(ctx, ctx->s_frame.width,
586 ctx->s_frame.height, cr.c.width,
587 cr.c.height, ctx->rotation);
588 }
589 if (ret) {
590 v4l2_err(&fimc->m2m.vfd, "Out of scaler range\n");
591 return -EINVAL;
592 }
593 }
594
595 f->offs_h = cr.c.left;
596 f->offs_v = cr.c.top;
597 f->width = cr.c.width;
598 f->height = cr.c.height;
599
600 fimc_ctx_state_set(FIMC_PARAMS, ctx);
601
602 return 0;
603 }
604
605 static const struct v4l2_ioctl_ops fimc_m2m_ioctl_ops = {
606 .vidioc_querycap = fimc_m2m_querycap,
607 .vidioc_enum_fmt_vid_cap_mplane = fimc_m2m_enum_fmt_mplane,
608 .vidioc_enum_fmt_vid_out_mplane = fimc_m2m_enum_fmt_mplane,
609 .vidioc_g_fmt_vid_cap_mplane = fimc_m2m_g_fmt_mplane,
610 .vidioc_g_fmt_vid_out_mplane = fimc_m2m_g_fmt_mplane,
611 .vidioc_try_fmt_vid_cap_mplane = fimc_m2m_try_fmt_mplane,
612 .vidioc_try_fmt_vid_out_mplane = fimc_m2m_try_fmt_mplane,
613 .vidioc_s_fmt_vid_cap_mplane = fimc_m2m_s_fmt_mplane,
614 .vidioc_s_fmt_vid_out_mplane = fimc_m2m_s_fmt_mplane,
615 .vidioc_reqbufs = fimc_m2m_reqbufs,
616 .vidioc_querybuf = fimc_m2m_querybuf,
617 .vidioc_qbuf = fimc_m2m_qbuf,
618 .vidioc_dqbuf = fimc_m2m_dqbuf,
619 .vidioc_expbuf = fimc_m2m_expbuf,
620 .vidioc_streamon = fimc_m2m_streamon,
621 .vidioc_streamoff = fimc_m2m_streamoff,
622 .vidioc_g_crop = fimc_m2m_g_crop,
623 .vidioc_s_crop = fimc_m2m_s_crop,
624 .vidioc_cropcap = fimc_m2m_cropcap
625
626 };
627
628 static int queue_init(void *priv, struct vb2_queue *src_vq,
629 struct vb2_queue *dst_vq)
630 {
631 struct fimc_ctx *ctx = priv;
632 int ret;
633
634 src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
635 src_vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
636 src_vq->drv_priv = ctx;
637 src_vq->ops = &fimc_qops;
638 src_vq->mem_ops = &vb2_dma_contig_memops;
639 src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
640
641 ret = vb2_queue_init(src_vq);
642 if (ret)
643 return ret;
644
645 dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
646 dst_vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
647 dst_vq->drv_priv = ctx;
648 dst_vq->ops = &fimc_qops;
649 dst_vq->mem_ops = &vb2_dma_contig_memops;
650 dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
651
652 return vb2_queue_init(dst_vq);
653 }
654
655 static int fimc_m2m_open(struct file *file)
656 {
657 struct fimc_dev *fimc = video_drvdata(file);
658 struct fimc_ctx *ctx;
659 int ret = -EBUSY;
660
661 dbg("pid: %d, state: 0x%lx, refcnt: %d",
662 task_pid_nr(current), fimc->state, fimc->vid_cap.refcnt);
663
664 if (mutex_lock_interruptible(&fimc->lock))
665 return -ERESTARTSYS;
666 /*
667 * Return if the corresponding video capture node
668 * is already opened.
669 */
670 if (fimc->vid_cap.refcnt > 0)
671 goto unlock;
672
673 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
674 if (!ctx) {
675 ret = -ENOMEM;
676 goto unlock;
677 }
678 v4l2_fh_init(&ctx->fh, &fimc->m2m.vfd);
679 ctx->fimc_dev = fimc;
680
681 /* Default color format */
682 ctx->s_frame.fmt = fimc_get_format(0);
683 ctx->d_frame.fmt = fimc_get_format(0);
684
685 ret = fimc_ctrls_create(ctx);
686 if (ret)
687 goto error_fh;
688
689 /* Use separate control handler per file handle */
690 ctx->fh.ctrl_handler = &ctx->ctrls.handler;
691 file->private_data = &ctx->fh;
692 v4l2_fh_add(&ctx->fh);
693
694 /* Setup the device context for memory-to-memory mode */
695 ctx->state = FIMC_CTX_M2M;
696 ctx->flags = 0;
697 ctx->in_path = FIMC_IO_DMA;
698 ctx->out_path = FIMC_IO_DMA;
699
700 ctx->m2m_ctx = v4l2_m2m_ctx_init(fimc->m2m.m2m_dev, ctx, queue_init);
701 if (IS_ERR(ctx->m2m_ctx)) {
702 ret = PTR_ERR(ctx->m2m_ctx);
703 goto error_c;
704 }
705
706 if (fimc->m2m.refcnt++ == 0)
707 set_bit(ST_M2M_RUN, &fimc->state);
708
709 mutex_unlock(&fimc->lock);
710 return 0;
711
712 error_c:
713 fimc_ctrls_delete(ctx);
714 error_fh:
715 v4l2_fh_del(&ctx->fh);
716 v4l2_fh_exit(&ctx->fh);
717 kfree(ctx);
718 unlock:
719 mutex_unlock(&fimc->lock);
720 return ret;
721 }
722
723 static int fimc_m2m_release(struct file *file)
724 {
725 struct fimc_ctx *ctx = fh_to_ctx(file->private_data);
726 struct fimc_dev *fimc = ctx->fimc_dev;
727
728 dbg("pid: %d, state: 0x%lx, refcnt= %d",
729 task_pid_nr(current), fimc->state, fimc->m2m.refcnt);
730
731 mutex_lock(&fimc->lock);
732
733 v4l2_m2m_ctx_release(ctx->m2m_ctx);
734 fimc_ctrls_delete(ctx);
735 v4l2_fh_del(&ctx->fh);
736 v4l2_fh_exit(&ctx->fh);
737
738 if (--fimc->m2m.refcnt <= 0)
739 clear_bit(ST_M2M_RUN, &fimc->state);
740 kfree(ctx);
741
742 mutex_unlock(&fimc->lock);
743 return 0;
744 }
745
746 static unsigned int fimc_m2m_poll(struct file *file,
747 struct poll_table_struct *wait)
748 {
749 struct fimc_ctx *ctx = fh_to_ctx(file->private_data);
750 struct fimc_dev *fimc = ctx->fimc_dev;
751 int ret;
752
753 if (mutex_lock_interruptible(&fimc->lock))
754 return -ERESTARTSYS;
755
756 ret = v4l2_m2m_poll(file, ctx->m2m_ctx, wait);
757 mutex_unlock(&fimc->lock);
758
759 return ret;
760 }
761
762
763 static int fimc_m2m_mmap(struct file *file, struct vm_area_struct *vma)
764 {
765 struct fimc_ctx *ctx = fh_to_ctx(file->private_data);
766 struct fimc_dev *fimc = ctx->fimc_dev;
767 int ret;
768
769 if (mutex_lock_interruptible(&fimc->lock))
770 return -ERESTARTSYS;
771
772 ret = v4l2_m2m_mmap(file, ctx->m2m_ctx, vma);
773 mutex_unlock(&fimc->lock);
774
775 return ret;
776 }
777
778 static const struct v4l2_file_operations fimc_m2m_fops = {
779 .owner = THIS_MODULE,
780 .open = fimc_m2m_open,
781 .release = fimc_m2m_release,
782 .poll = fimc_m2m_poll,
783 .unlocked_ioctl = video_ioctl2,
784 .mmap = fimc_m2m_mmap,
785 };
786
787 static struct v4l2_m2m_ops m2m_ops = {
788 .device_run = fimc_device_run,
789 .job_abort = fimc_job_abort,
790 };
791
792 int fimc_register_m2m_device(struct fimc_dev *fimc,
793 struct v4l2_device *v4l2_dev)
794 {
795 struct video_device *vfd = &fimc->m2m.vfd;
796 int ret;
797
798 fimc->v4l2_dev = v4l2_dev;
799
800 memset(vfd, 0, sizeof(*vfd));
801 vfd->fops = &fimc_m2m_fops;
802 vfd->ioctl_ops = &fimc_m2m_ioctl_ops;
803 vfd->v4l2_dev = v4l2_dev;
804 vfd->minor = -1;
805 vfd->release = video_device_release_empty;
806 vfd->lock = &fimc->lock;
807 vfd->vfl_dir = VFL_DIR_M2M;
808
809 snprintf(vfd->name, sizeof(vfd->name), "fimc.%d.m2m", fimc->id);
810 video_set_drvdata(vfd, fimc);
811
812 fimc->m2m.m2m_dev = v4l2_m2m_init(&m2m_ops);
813 if (IS_ERR(fimc->m2m.m2m_dev)) {
814 v4l2_err(v4l2_dev, "failed to initialize v4l2-m2m device\n");
815 return PTR_ERR(fimc->m2m.m2m_dev);
816 }
817
818 ret = media_entity_init(&vfd->entity, 0, NULL, 0);
819 if (ret)
820 goto err_me;
821
822 ret = video_register_device(vfd, VFL_TYPE_GRABBER, -1);
823 if (ret)
824 goto err_vd;
825
826 v4l2_info(v4l2_dev, "Registered %s as /dev/%s\n",
827 vfd->name, video_device_node_name(vfd));
828 return 0;
829
830 err_vd:
831 media_entity_cleanup(&vfd->entity);
832 err_me:
833 v4l2_m2m_release(fimc->m2m.m2m_dev);
834 return ret;
835 }
836
837 void fimc_unregister_m2m_device(struct fimc_dev *fimc)
838 {
839 if (!fimc)
840 return;
841
842 if (fimc->m2m.m2m_dev)
843 v4l2_m2m_release(fimc->m2m.m2m_dev);
844
845 if (video_is_registered(&fimc->m2m.vfd)) {
846 video_unregister_device(&fimc->m2m.vfd);
847 media_entity_cleanup(&fimc->m2m.vfd.entity);
848 }
849 }
Linux kernel - Deliverables
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