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[media] s5p-fimc: Use vb2 ioctl/fop helpers in FIMC capture driver
[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 - 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-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_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, const struct v4l2_format *fmt,
176 unsigned int *num_buffers, unsigned int *num_planes,
177 unsigned int sizes[], void *allocators[])
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-contigous 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->f_width * f->f_height * f->fmt->depth[i]) / 8;
196 allocators[i] = ctx->fimc_dev->alloc_ctx;
197 }
198 return 0;
199 }
200
201 static int fimc_buf_prepare(struct vb2_buffer *vb)
202 {
203 struct fimc_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
204 struct fimc_frame *frame;
205 int i;
206
207 frame = ctx_get_frame(ctx, vb->vb2_queue->type);
208 if (IS_ERR(frame))
209 return PTR_ERR(frame);
210
211 for (i = 0; i < frame->fmt->memplanes; i++)
212 vb2_set_plane_payload(vb, i, frame->payload[i]);
213
214 return 0;
215 }
216
217 static void fimc_buf_queue(struct vb2_buffer *vb)
218 {
219 struct fimc_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
220
221 dbg("ctx: %p, ctx->state: 0x%x", ctx, ctx->state);
222
223 if (ctx->m2m_ctx)
224 v4l2_m2m_buf_queue(ctx->m2m_ctx, vb);
225 }
226
227 static void fimc_lock(struct vb2_queue *vq)
228 {
229 struct fimc_ctx *ctx = vb2_get_drv_priv(vq);
230 mutex_lock(&ctx->fimc_dev->lock);
231 }
232
233 static void fimc_unlock(struct vb2_queue *vq)
234 {
235 struct fimc_ctx *ctx = vb2_get_drv_priv(vq);
236 mutex_unlock(&ctx->fimc_dev->lock);
237 }
238
239 static struct vb2_ops fimc_qops = {
240 .queue_setup = fimc_queue_setup,
241 .buf_prepare = fimc_buf_prepare,
242 .buf_queue = fimc_buf_queue,
243 .wait_prepare = fimc_unlock,
244 .wait_finish = fimc_lock,
245 .stop_streaming = stop_streaming,
246 .start_streaming = start_streaming,
247 };
248
249 /*
250 * V4L2 ioctl handlers
251 */
252 static int fimc_m2m_querycap(struct file *file, void *fh,
253 struct v4l2_capability *cap)
254 {
255 struct fimc_ctx *ctx = fh_to_ctx(fh);
256 struct fimc_dev *fimc = ctx->fimc_dev;
257
258 strncpy(cap->driver, fimc->pdev->name, sizeof(cap->driver) - 1);
259 strncpy(cap->card, fimc->pdev->name, sizeof(cap->card) - 1);
260 cap->bus_info[0] = 0;
261 /*
262 * This is only a mem-to-mem video device. The capture and output
263 * device capability flags are left only for backward compatibility
264 * and are scheduled for removal.
265 */
266 cap->capabilities = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_M2M_MPLANE |
267 V4L2_CAP_VIDEO_CAPTURE_MPLANE | V4L2_CAP_VIDEO_OUTPUT_MPLANE;
268
269 return 0;
270 }
271
272 static int fimc_m2m_enum_fmt_mplane(struct file *file, void *priv,
273 struct v4l2_fmtdesc *f)
274 {
275 struct fimc_fmt *fmt;
276
277 fmt = fimc_find_format(NULL, NULL, get_m2m_fmt_flags(f->type),
278 f->index);
279 if (!fmt)
280 return -EINVAL;
281
282 strncpy(f->description, fmt->name, sizeof(f->description) - 1);
283 f->pixelformat = fmt->fourcc;
284 return 0;
285 }
286
287 static int fimc_m2m_g_fmt_mplane(struct file *file, void *fh,
288 struct v4l2_format *f)
289 {
290 struct fimc_ctx *ctx = fh_to_ctx(fh);
291 struct fimc_frame *frame = ctx_get_frame(ctx, f->type);
292
293 if (IS_ERR(frame))
294 return PTR_ERR(frame);
295
296 __fimc_get_format(frame, f);
297 return 0;
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 const 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 fmt = fimc_find_format(&pix->pixelformat, NULL,
312 get_m2m_fmt_flags(f->type), 0);
313 if (WARN(fmt == NULL, "Pixel format lookup failed"))
314 return -EINVAL;
315
316 if (pix->field == V4L2_FIELD_ANY)
317 pix->field = V4L2_FIELD_NONE;
318 else if (pix->field != V4L2_FIELD_NONE)
319 return -EINVAL;
320
321 if (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
322 max_w = variant->pix_limit->scaler_dis_w;
323 mod_x = ffs(variant->min_inp_pixsize) - 1;
324 } else {
325 max_w = variant->pix_limit->out_rot_dis_w;
326 mod_x = ffs(variant->min_out_pixsize) - 1;
327 }
328
329 if (tiled_fmt(fmt)) {
330 mod_x = 6; /* 64 x 32 pixels tile */
331 mod_y = 5;
332 } else {
333 if (variant->min_vsize_align == 1)
334 mod_y = fimc_fmt_is_rgb(fmt->color) ? 0 : 1;
335 else
336 mod_y = ffs(variant->min_vsize_align) - 1;
337 }
338
339 v4l_bound_align_image(&pix->width, 16, max_w, mod_x,
340 &pix->height, 8, variant->pix_limit->scaler_dis_w, mod_y, 0);
341
342 fimc_adjust_mplane_format(fmt, pix->width, pix->height, &f->fmt.pix_mp);
343 return 0;
344 }
345
346 static int fimc_m2m_try_fmt_mplane(struct file *file, void *fh,
347 struct v4l2_format *f)
348 {
349 struct fimc_ctx *ctx = fh_to_ctx(fh);
350 return fimc_try_fmt_mplane(ctx, f);
351 }
352
353 static void __set_frame_format(struct fimc_frame *frame, struct fimc_fmt *fmt,
354 struct v4l2_pix_format_mplane *pixm)
355 {
356 int i;
357
358 for (i = 0; i < fmt->colplanes; i++) {
359 frame->bytesperline[i] = pixm->plane_fmt[i].bytesperline;
360 frame->payload[i] = pixm->plane_fmt[i].sizeimage;
361 }
362
363 frame->f_width = pixm->width;
364 frame->f_height = pixm->height;
365 frame->o_width = pixm->width;
366 frame->o_height = pixm->height;
367 frame->width = pixm->width;
368 frame->height = pixm->height;
369 frame->offs_h = 0;
370 frame->offs_v = 0;
371 frame->fmt = fmt;
372 }
373
374 static int fimc_m2m_s_fmt_mplane(struct file *file, void *fh,
375 struct v4l2_format *f)
376 {
377 struct fimc_ctx *ctx = fh_to_ctx(fh);
378 struct fimc_dev *fimc = ctx->fimc_dev;
379 struct fimc_fmt *fmt;
380 struct vb2_queue *vq;
381 struct fimc_frame *frame;
382 int ret;
383
384 ret = fimc_try_fmt_mplane(ctx, f);
385 if (ret)
386 return ret;
387
388 vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
389
390 if (vb2_is_busy(vq)) {
391 v4l2_err(&fimc->m2m.vfd, "queue (%d) busy\n", f->type);
392 return -EBUSY;
393 }
394
395 if (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
396 frame = &ctx->s_frame;
397 else
398 frame = &ctx->d_frame;
399
400 fmt = fimc_find_format(&f->fmt.pix_mp.pixelformat, NULL,
401 get_m2m_fmt_flags(f->type), 0);
402 if (!fmt)
403 return -EINVAL;
404
405 __set_frame_format(frame, fmt, &f->fmt.pix_mp);
406
407 /* Update RGB Alpha control state and value range */
408 fimc_alpha_ctrl_update(ctx);
409
410 return 0;
411 }
412
413 static int fimc_m2m_reqbufs(struct file *file, void *fh,
414 struct v4l2_requestbuffers *reqbufs)
415 {
416 struct fimc_ctx *ctx = fh_to_ctx(fh);
417 return v4l2_m2m_reqbufs(file, ctx->m2m_ctx, reqbufs);
418 }
419
420 static int fimc_m2m_querybuf(struct file *file, void *fh,
421 struct v4l2_buffer *buf)
422 {
423 struct fimc_ctx *ctx = fh_to_ctx(fh);
424 return v4l2_m2m_querybuf(file, ctx->m2m_ctx, buf);
425 }
426
427 static int fimc_m2m_qbuf(struct file *file, void *fh,
428 struct v4l2_buffer *buf)
429 {
430 struct fimc_ctx *ctx = fh_to_ctx(fh);
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 return v4l2_m2m_dqbuf(file, ctx->m2m_ctx, buf);
439 }
440
441 static int fimc_m2m_expbuf(struct file *file, void *fh,
442 struct v4l2_exportbuffer *eb)
443 {
444 struct fimc_ctx *ctx = fh_to_ctx(fh);
445 return v4l2_m2m_expbuf(file, ctx->m2m_ctx, eb);
446 }
447
448
449 static int fimc_m2m_streamon(struct file *file, void *fh,
450 enum v4l2_buf_type type)
451 {
452 struct fimc_ctx *ctx = fh_to_ctx(fh);
453 return v4l2_m2m_streamon(file, ctx->m2m_ctx, type);
454 }
455
456 static int fimc_m2m_streamoff(struct file *file, void *fh,
457 enum v4l2_buf_type type)
458 {
459 struct fimc_ctx *ctx = fh_to_ctx(fh);
460 return v4l2_m2m_streamoff(file, ctx->m2m_ctx, type);
461 }
462
463 static int fimc_m2m_cropcap(struct file *file, void *fh,
464 struct v4l2_cropcap *cr)
465 {
466 struct fimc_ctx *ctx = fh_to_ctx(fh);
467 struct fimc_frame *frame;
468
469 frame = ctx_get_frame(ctx, cr->type);
470 if (IS_ERR(frame))
471 return PTR_ERR(frame);
472
473 cr->bounds.left = 0;
474 cr->bounds.top = 0;
475 cr->bounds.width = frame->o_width;
476 cr->bounds.height = frame->o_height;
477 cr->defrect = cr->bounds;
478
479 return 0;
480 }
481
482 static int fimc_m2m_g_crop(struct file *file, void *fh, struct v4l2_crop *cr)
483 {
484 struct fimc_ctx *ctx = fh_to_ctx(fh);
485 struct fimc_frame *frame;
486
487 frame = ctx_get_frame(ctx, cr->type);
488 if (IS_ERR(frame))
489 return PTR_ERR(frame);
490
491 cr->c.left = frame->offs_h;
492 cr->c.top = frame->offs_v;
493 cr->c.width = frame->width;
494 cr->c.height = frame->height;
495
496 return 0;
497 }
498
499 static int fimc_m2m_try_crop(struct fimc_ctx *ctx, struct v4l2_crop *cr)
500 {
501 struct fimc_dev *fimc = ctx->fimc_dev;
502 struct fimc_frame *f;
503 u32 min_size, halign, depth = 0;
504 int i;
505
506 if (cr->c.top < 0 || cr->c.left < 0) {
507 v4l2_err(&fimc->m2m.vfd,
508 "doesn't support negative values for top & left\n");
509 return -EINVAL;
510 }
511 if (cr->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
512 f = &ctx->d_frame;
513 else if (cr->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
514 f = &ctx->s_frame;
515 else
516 return -EINVAL;
517
518 min_size = (f == &ctx->s_frame) ?
519 fimc->variant->min_inp_pixsize : fimc->variant->min_out_pixsize;
520
521 /* Get pixel alignment constraints. */
522 if (fimc->variant->min_vsize_align == 1)
523 halign = fimc_fmt_is_rgb(f->fmt->color) ? 0 : 1;
524 else
525 halign = ffs(fimc->variant->min_vsize_align) - 1;
526
527 for (i = 0; i < f->fmt->colplanes; i++)
528 depth += f->fmt->depth[i];
529
530 v4l_bound_align_image(&cr->c.width, min_size, f->o_width,
531 ffs(min_size) - 1,
532 &cr->c.height, min_size, f->o_height,
533 halign, 64/(ALIGN(depth, 8)));
534
535 /* adjust left/top if cropping rectangle is out of bounds */
536 if (cr->c.left + cr->c.width > f->o_width)
537 cr->c.left = f->o_width - cr->c.width;
538 if (cr->c.top + cr->c.height > f->o_height)
539 cr->c.top = f->o_height - cr->c.height;
540
541 cr->c.left = round_down(cr->c.left, min_size);
542 cr->c.top = round_down(cr->c.top, fimc->variant->hor_offs_align);
543
544 dbg("l:%d, t:%d, w:%d, h:%d, f_w: %d, f_h: %d",
545 cr->c.left, cr->c.top, cr->c.width, cr->c.height,
546 f->f_width, f->f_height);
547
548 return 0;
549 }
550
551 static int fimc_m2m_s_crop(struct file *file, void *fh, const struct v4l2_crop *crop)
552 {
553 struct fimc_ctx *ctx = fh_to_ctx(fh);
554 struct fimc_dev *fimc = ctx->fimc_dev;
555 struct v4l2_crop cr = *crop;
556 struct fimc_frame *f;
557 int ret;
558
559 ret = fimc_m2m_try_crop(ctx, &cr);
560 if (ret)
561 return ret;
562
563 f = (cr.type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) ?
564 &ctx->s_frame : &ctx->d_frame;
565
566 /* Check to see if scaling ratio is within supported range */
567 if (cr.type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
568 ret = fimc_check_scaler_ratio(ctx, cr.c.width,
569 cr.c.height, ctx->d_frame.width,
570 ctx->d_frame.height, ctx->rotation);
571 } else {
572 ret = fimc_check_scaler_ratio(ctx, ctx->s_frame.width,
573 ctx->s_frame.height, cr.c.width,
574 cr.c.height, ctx->rotation);
575 }
576 if (ret) {
577 v4l2_err(&fimc->m2m.vfd, "Out of scaler range\n");
578 return -EINVAL;
579 }
580
581 f->offs_h = cr.c.left;
582 f->offs_v = cr.c.top;
583 f->width = cr.c.width;
584 f->height = cr.c.height;
585
586 fimc_ctx_state_set(FIMC_PARAMS, ctx);
587
588 return 0;
589 }
590
591 static const struct v4l2_ioctl_ops fimc_m2m_ioctl_ops = {
592 .vidioc_querycap = fimc_m2m_querycap,
593 .vidioc_enum_fmt_vid_cap_mplane = fimc_m2m_enum_fmt_mplane,
594 .vidioc_enum_fmt_vid_out_mplane = fimc_m2m_enum_fmt_mplane,
595 .vidioc_g_fmt_vid_cap_mplane = fimc_m2m_g_fmt_mplane,
596 .vidioc_g_fmt_vid_out_mplane = fimc_m2m_g_fmt_mplane,
597 .vidioc_try_fmt_vid_cap_mplane = fimc_m2m_try_fmt_mplane,
598 .vidioc_try_fmt_vid_out_mplane = fimc_m2m_try_fmt_mplane,
599 .vidioc_s_fmt_vid_cap_mplane = fimc_m2m_s_fmt_mplane,
600 .vidioc_s_fmt_vid_out_mplane = fimc_m2m_s_fmt_mplane,
601 .vidioc_reqbufs = fimc_m2m_reqbufs,
602 .vidioc_querybuf = fimc_m2m_querybuf,
603 .vidioc_qbuf = fimc_m2m_qbuf,
604 .vidioc_dqbuf = fimc_m2m_dqbuf,
605 .vidioc_expbuf = fimc_m2m_expbuf,
606 .vidioc_streamon = fimc_m2m_streamon,
607 .vidioc_streamoff = fimc_m2m_streamoff,
608 .vidioc_g_crop = fimc_m2m_g_crop,
609 .vidioc_s_crop = fimc_m2m_s_crop,
610 .vidioc_cropcap = fimc_m2m_cropcap
611
612 };
613
614 static int queue_init(void *priv, struct vb2_queue *src_vq,
615 struct vb2_queue *dst_vq)
616 {
617 struct fimc_ctx *ctx = priv;
618 int ret;
619
620 src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
621 src_vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
622 src_vq->drv_priv = ctx;
623 src_vq->ops = &fimc_qops;
624 src_vq->mem_ops = &vb2_dma_contig_memops;
625 src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
626
627 ret = vb2_queue_init(src_vq);
628 if (ret)
629 return ret;
630
631 dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
632 dst_vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
633 dst_vq->drv_priv = ctx;
634 dst_vq->ops = &fimc_qops;
635 dst_vq->mem_ops = &vb2_dma_contig_memops;
636 dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
637
638 return vb2_queue_init(dst_vq);
639 }
640
641 static int fimc_m2m_set_default_format(struct fimc_ctx *ctx)
642 {
643 struct v4l2_pix_format_mplane pixm = {
644 .pixelformat = V4L2_PIX_FMT_RGB32,
645 .width = 800,
646 .height = 600,
647 .plane_fmt[0] = {
648 .bytesperline = 800 * 4,
649 .sizeimage = 800 * 4 * 600,
650 },
651 };
652 struct fimc_fmt *fmt;
653
654 fmt = fimc_find_format(&pixm.pixelformat, NULL, FMT_FLAGS_M2M, 0);
655 if (!fmt)
656 return -EINVAL;
657
658 __set_frame_format(&ctx->s_frame, fmt, &pixm);
659 __set_frame_format(&ctx->d_frame, fmt, &pixm);
660
661 return 0;
662 }
663
664 static int fimc_m2m_open(struct file *file)
665 {
666 struct fimc_dev *fimc = video_drvdata(file);
667 struct fimc_ctx *ctx;
668 int ret = -EBUSY;
669
670 pr_debug("pid: %d, state: %#lx\n", task_pid_nr(current), fimc->state);
671
672 if (mutex_lock_interruptible(&fimc->lock))
673 return -ERESTARTSYS;
674 /*
675 * Don't allow simultaneous open() of the mem-to-mem and the
676 * capture video node that belong to same FIMC IP instance.
677 */
678 if (test_bit(ST_CAPT_BUSY, &fimc->state))
679 goto unlock;
680
681 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
682 if (!ctx) {
683 ret = -ENOMEM;
684 goto unlock;
685 }
686 v4l2_fh_init(&ctx->fh, &fimc->m2m.vfd);
687 ctx->fimc_dev = fimc;
688
689 /* Default color format */
690 ctx->s_frame.fmt = fimc_get_format(0);
691 ctx->d_frame.fmt = fimc_get_format(0);
692
693 ret = fimc_ctrls_create(ctx);
694 if (ret)
695 goto error_fh;
696
697 /* Use separate control handler per file handle */
698 ctx->fh.ctrl_handler = &ctx->ctrls.handler;
699 file->private_data = &ctx->fh;
700 v4l2_fh_add(&ctx->fh);
701
702 /* Setup the device context for memory-to-memory mode */
703 ctx->state = FIMC_CTX_M2M;
704 ctx->flags = 0;
705 ctx->in_path = FIMC_IO_DMA;
706 ctx->out_path = FIMC_IO_DMA;
707 ctx->scaler.enabled = 1;
708
709 ctx->m2m_ctx = v4l2_m2m_ctx_init(fimc->m2m.m2m_dev, ctx, queue_init);
710 if (IS_ERR(ctx->m2m_ctx)) {
711 ret = PTR_ERR(ctx->m2m_ctx);
712 goto error_c;
713 }
714
715 if (fimc->m2m.refcnt++ == 0)
716 set_bit(ST_M2M_RUN, &fimc->state);
717
718 ret = fimc_m2m_set_default_format(ctx);
719 if (ret < 0)
720 goto error_m2m_ctx;
721
722 mutex_unlock(&fimc->lock);
723 return 0;
724
725 error_m2m_ctx:
726 v4l2_m2m_ctx_release(ctx->m2m_ctx);
727 error_c:
728 fimc_ctrls_delete(ctx);
729 error_fh:
730 v4l2_fh_del(&ctx->fh);
731 v4l2_fh_exit(&ctx->fh);
732 kfree(ctx);
733 unlock:
734 mutex_unlock(&fimc->lock);
735 return ret;
736 }
737
738 static int fimc_m2m_release(struct file *file)
739 {
740 struct fimc_ctx *ctx = fh_to_ctx(file->private_data);
741 struct fimc_dev *fimc = ctx->fimc_dev;
742
743 dbg("pid: %d, state: 0x%lx, refcnt= %d",
744 task_pid_nr(current), fimc->state, fimc->m2m.refcnt);
745
746 mutex_lock(&fimc->lock);
747
748 v4l2_m2m_ctx_release(ctx->m2m_ctx);
749 fimc_ctrls_delete(ctx);
750 v4l2_fh_del(&ctx->fh);
751 v4l2_fh_exit(&ctx->fh);
752
753 if (--fimc->m2m.refcnt <= 0)
754 clear_bit(ST_M2M_RUN, &fimc->state);
755 kfree(ctx);
756
757 mutex_unlock(&fimc->lock);
758 return 0;
759 }
760
761 static unsigned int fimc_m2m_poll(struct file *file,
762 struct poll_table_struct *wait)
763 {
764 struct fimc_ctx *ctx = fh_to_ctx(file->private_data);
765 struct fimc_dev *fimc = ctx->fimc_dev;
766 int ret;
767
768 if (mutex_lock_interruptible(&fimc->lock))
769 return -ERESTARTSYS;
770
771 ret = v4l2_m2m_poll(file, ctx->m2m_ctx, wait);
772 mutex_unlock(&fimc->lock);
773
774 return ret;
775 }
776
777
778 static int fimc_m2m_mmap(struct file *file, struct vm_area_struct *vma)
779 {
780 struct fimc_ctx *ctx = fh_to_ctx(file->private_data);
781 struct fimc_dev *fimc = ctx->fimc_dev;
782 int ret;
783
784 if (mutex_lock_interruptible(&fimc->lock))
785 return -ERESTARTSYS;
786
787 ret = v4l2_m2m_mmap(file, ctx->m2m_ctx, vma);
788 mutex_unlock(&fimc->lock);
789
790 return ret;
791 }
792
793 static const struct v4l2_file_operations fimc_m2m_fops = {
794 .owner = THIS_MODULE,
795 .open = fimc_m2m_open,
796 .release = fimc_m2m_release,
797 .poll = fimc_m2m_poll,
798 .unlocked_ioctl = video_ioctl2,
799 .mmap = fimc_m2m_mmap,
800 };
801
802 static struct v4l2_m2m_ops m2m_ops = {
803 .device_run = fimc_device_run,
804 .job_abort = fimc_job_abort,
805 };
806
807 int fimc_register_m2m_device(struct fimc_dev *fimc,
808 struct v4l2_device *v4l2_dev)
809 {
810 struct video_device *vfd = &fimc->m2m.vfd;
811 int ret;
812
813 fimc->v4l2_dev = v4l2_dev;
814
815 memset(vfd, 0, sizeof(*vfd));
816 vfd->fops = &fimc_m2m_fops;
817 vfd->ioctl_ops = &fimc_m2m_ioctl_ops;
818 vfd->v4l2_dev = v4l2_dev;
819 vfd->minor = -1;
820 vfd->release = video_device_release_empty;
821 vfd->lock = &fimc->lock;
822 vfd->vfl_dir = VFL_DIR_M2M;
823
824 snprintf(vfd->name, sizeof(vfd->name), "fimc.%d.m2m", fimc->id);
825 video_set_drvdata(vfd, fimc);
826
827 fimc->m2m.m2m_dev = v4l2_m2m_init(&m2m_ops);
828 if (IS_ERR(fimc->m2m.m2m_dev)) {
829 v4l2_err(v4l2_dev, "failed to initialize v4l2-m2m device\n");
830 return PTR_ERR(fimc->m2m.m2m_dev);
831 }
832
833 ret = media_entity_init(&vfd->entity, 0, NULL, 0);
834 if (ret)
835 goto err_me;
836
837 ret = video_register_device(vfd, VFL_TYPE_GRABBER, -1);
838 if (ret)
839 goto err_vd;
840
841 v4l2_info(v4l2_dev, "Registered %s as /dev/%s\n",
842 vfd->name, video_device_node_name(vfd));
843 return 0;
844
845 err_vd:
846 media_entity_cleanup(&vfd->entity);
847 err_me:
848 v4l2_m2m_release(fimc->m2m.m2m_dev);
849 return ret;
850 }
851
852 void fimc_unregister_m2m_device(struct fimc_dev *fimc)
853 {
854 if (!fimc)
855 return;
856
857 if (fimc->m2m.m2m_dev)
858 v4l2_m2m_release(fimc->m2m.m2m_dev);
859
860 if (video_is_registered(&fimc->m2m.vfd)) {
861 video_unregister_device(&fimc->m2m.vfd);
862 media_entity_cleanup(&fimc->m2m.vfd.entity);
863 }
864 }
Linux kernel - Deliverables
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