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Merge branches 'x86-cleanups-for-linus' and 'x86-cpufeature-for-linus' of git://git...
[deliverable/linux.git] / drivers / media / video / s5p-fimc / fimc-m2m.c
CommitLineData
97d97422
SN		 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"
c83a1ff0 31#include "fimc-reg.h"
97d97422
SN		 32#include "fimc-mdevice.h"
33
34
35static 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
43void 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. */
62static 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
79static 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
88static 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
101static 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 u32 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);
9448ab7d 153 fimc_hw_set_effect(ctx);
97d97422
SN		 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
167dma_unlock:
168 spin_unlock_irqrestore(&fimc->slock, flags);
169}
170
171static void fimc_job_abort(void *priv)
172{
173 fimc_m2m_shutdown(priv);
174}
175
176static 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
202static 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
218static 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
228static 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
234static 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
240static 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 */
253static 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 cap->capabilities = V4L2_CAP_STREAMING |
263 V4L2_CAP_VIDEO_CAPTURE_MPLANE | V4L2_CAP_VIDEO_OUTPUT_MPLANE;
264
265 return 0;
266}
267
268static int fimc_m2m_enum_fmt_mplane(struct file *file, void *priv,
269 struct v4l2_fmtdesc *f)
270{
271 struct fimc_fmt *fmt;
272
273 fmt = fimc_find_format(NULL, NULL, get_m2m_fmt_flags(f->type),
274 f->index);
275 if (!fmt)
276 return -EINVAL;
277
278 strncpy(f->description, fmt->name, sizeof(f->description) - 1);
279 f->pixelformat = fmt->fourcc;
280 return 0;
281}
282
283static int fimc_m2m_g_fmt_mplane(struct file *file, void *fh,
284 struct v4l2_format *f)
285{
286 struct fimc_ctx *ctx = fh_to_ctx(fh);
287 struct fimc_frame *frame = ctx_get_frame(ctx, f->type);
288
289 if (IS_ERR(frame))
290 return PTR_ERR(frame);
291
292 return fimc_fill_format(frame, f);
293}
294
295static int fimc_try_fmt_mplane(struct fimc_ctx *ctx, struct v4l2_format *f)
296{
297 struct fimc_dev *fimc = ctx->fimc_dev;
bb7c276e 298 struct fimc_variant *variant = fimc->variant;
97d97422
SN		 299 struct v4l2_pix_format_mplane *pix = &f->fmt.pix_mp;
300 struct fimc_fmt *fmt;
301 u32 max_w, mod_x, mod_y;
302
303 if (!IS_M2M(f->type))
304 return -EINVAL;
305
306 dbg("w: %d, h: %d", pix->width, pix->height);
307
308 fmt = fimc_find_format(&pix->pixelformat, NULL,
309 get_m2m_fmt_flags(f->type), 0);
310 if (WARN(fmt == NULL, "Pixel format lookup failed"))
311 return -EINVAL;
312
313 if (pix->field == V4L2_FIELD_ANY)
314 pix->field = V4L2_FIELD_NONE;
315 else if (pix->field != V4L2_FIELD_NONE)
316 return -EINVAL;
317
318 if (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
319 max_w = variant->pix_limit->scaler_dis_w;
320 mod_x = ffs(variant->min_inp_pixsize) - 1;
321 } else {
322 max_w = variant->pix_limit->out_rot_dis_w;
323 mod_x = ffs(variant->min_out_pixsize) - 1;
324 }
325
326 if (tiled_fmt(fmt)) {
327 mod_x = 6; /* 64 x 32 pixels tile */
328 mod_y = 5;
329 } else {
330 if (variant->min_vsize_align == 1)
331 mod_y = fimc_fmt_is_rgb(fmt->color) ? 0 : 1;
332 else
333 mod_y = ffs(variant->min_vsize_align) - 1;
334 }
335
336 v4l_bound_align_image(&pix->width, 16, max_w, mod_x,
337 &pix->height, 8, variant->pix_limit->scaler_dis_w, mod_y, 0);
338
339 fimc_adjust_mplane_format(fmt, pix->width, pix->height, &f->fmt.pix_mp);
340 return 0;
341}
342
343static int fimc_m2m_try_fmt_mplane(struct file *file, void *fh,
344 struct v4l2_format *f)
345{
346 struct fimc_ctx *ctx = fh_to_ctx(fh);
347
348 return fimc_try_fmt_mplane(ctx, f);
349}
350
351static int fimc_m2m_s_fmt_mplane(struct file *file, void *fh,
352 struct v4l2_format *f)
353{
354 struct fimc_ctx *ctx = fh_to_ctx(fh);
355 struct fimc_dev *fimc = ctx->fimc_dev;
356 struct vb2_queue *vq;
357 struct fimc_frame *frame;
358 struct v4l2_pix_format_mplane *pix;
359 int i, ret = 0;
360
361 ret = fimc_try_fmt_mplane(ctx, f);
362 if (ret)
363 return ret;
364
365 vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
366
367 if (vb2_is_busy(vq)) {
368 v4l2_err(fimc->m2m.vfd, "queue (%d) busy\n", f->type);
369 return -EBUSY;
370 }
371
372 if (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
373 frame = &ctx->s_frame;
374 else
375 frame = &ctx->d_frame;
376
377 pix = &f->fmt.pix_mp;
378 frame->fmt = fimc_find_format(&pix->pixelformat, NULL,
379 get_m2m_fmt_flags(f->type), 0);
380 if (!frame->fmt)
381 return -EINVAL;
382
383 /* Update RGB Alpha control state and value range */
384 fimc_alpha_ctrl_update(ctx);
385
386 for (i = 0; i < frame->fmt->colplanes; i++) {
387 frame->payload[i] =
388 (pix->width * pix->height * frame->fmt->depth[i]) / 8;
389 }
390
391 fimc_fill_frame(frame, f);
392
393 ctx->scaler.enabled = 1;
394
395 if (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
396 fimc_ctx_state_set(FIMC_PARAMS | FIMC_DST_FMT, ctx);
397 else
398 fimc_ctx_state_set(FIMC_PARAMS | FIMC_SRC_FMT, ctx);
399
400 dbg("f_w: %d, f_h: %d", frame->f_width, frame->f_height);
401
402 return 0;
403}
404
405static int fimc_m2m_reqbufs(struct file *file, void *fh,
406 struct v4l2_requestbuffers *reqbufs)
407{
408 struct fimc_ctx *ctx = fh_to_ctx(fh);
409
410 return v4l2_m2m_reqbufs(file, ctx->m2m_ctx, reqbufs);
411}
412
413static int fimc_m2m_querybuf(struct file *file, void *fh,
414 struct v4l2_buffer *buf)
415{
416 struct fimc_ctx *ctx = fh_to_ctx(fh);
417
418 return v4l2_m2m_querybuf(file, ctx->m2m_ctx, buf);
419}
420
421static int fimc_m2m_qbuf(struct file *file, void *fh,
422 struct v4l2_buffer *buf)
423{
424 struct fimc_ctx *ctx = fh_to_ctx(fh);
425
426 return v4l2_m2m_qbuf(file, ctx->m2m_ctx, buf);
427}
428
429static int fimc_m2m_dqbuf(struct file *file, void *fh,
430 struct v4l2_buffer *buf)
431{
432 struct fimc_ctx *ctx = fh_to_ctx(fh);
433
434 return v4l2_m2m_dqbuf(file, ctx->m2m_ctx, buf);
435}
436
437static int fimc_m2m_streamon(struct file *file, void *fh,
438 enum v4l2_buf_type type)
439{
440 struct fimc_ctx *ctx = fh_to_ctx(fh);
441
442 /* The source and target color format need to be set */
443 if (V4L2_TYPE_IS_OUTPUT(type)) {
444 if (!fimc_ctx_state_is_set(FIMC_SRC_FMT, ctx))
445 return -EINVAL;
446 } else if (!fimc_ctx_state_is_set(FIMC_DST_FMT, ctx)) {
447 return -EINVAL;
448 }
449
450 return v4l2_m2m_streamon(file, ctx->m2m_ctx, type);
451}
452
453static int fimc_m2m_streamoff(struct file *file, void *fh,
454 enum v4l2_buf_type type)
455{
456 struct fimc_ctx *ctx = fh_to_ctx(fh);
457
458 return v4l2_m2m_streamoff(file, ctx->m2m_ctx, type);
459}
460
461static int fimc_m2m_cropcap(struct file *file, void *fh,
462 struct v4l2_cropcap *cr)
463{
464 struct fimc_ctx *ctx = fh_to_ctx(fh);
465 struct fimc_frame *frame;
466
467 frame = ctx_get_frame(ctx, cr->type);
468 if (IS_ERR(frame))
469 return PTR_ERR(frame);
470
471 cr->bounds.left = 0;
472 cr->bounds.top = 0;
473 cr->bounds.width = frame->o_width;
474 cr->bounds.height = frame->o_height;
475 cr->defrect = cr->bounds;
476
477 return 0;
478}
479
480static int fimc_m2m_g_crop(struct file *file, void *fh, struct v4l2_crop *cr)
481{
482 struct fimc_ctx *ctx = fh_to_ctx(fh);
483 struct fimc_frame *frame;
484
485 frame = ctx_get_frame(ctx, cr->type);
486 if (IS_ERR(frame))
487 return PTR_ERR(frame);
488
489 cr->c.left = frame->offs_h;
490 cr->c.top = frame->offs_v;
491 cr->c.width = frame->width;
492 cr->c.height = frame->height;
493
494 return 0;
495}
496
497static int fimc_m2m_try_crop(struct fimc_ctx *ctx, struct v4l2_crop *cr)
498{
499 struct fimc_dev *fimc = ctx->fimc_dev;
500 struct fimc_frame *f;
501 u32 min_size, halign, depth = 0;
502 int i;
503
504 if (cr->c.top < 0 || cr->c.left < 0) {
505 v4l2_err(fimc->m2m.vfd,
506 "doesn't support negative values for top & left\n");
507 return -EINVAL;
508 }
509 if (cr->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
510 f = &ctx->d_frame;
511 else if (cr->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
512 f = &ctx->s_frame;
513 else
514 return -EINVAL;
515
516 min_size = (f == &ctx->s_frame) ?
517 fimc->variant->min_inp_pixsize : fimc->variant->min_out_pixsize;
518
519 /* Get pixel alignment constraints. */
520 if (fimc->variant->min_vsize_align == 1)
521 halign = fimc_fmt_is_rgb(f->fmt->color) ? 0 : 1;
522 else
523 halign = ffs(fimc->variant->min_vsize_align) - 1;
524
525 for (i = 0; i < f->fmt->colplanes; i++)
526 depth += f->fmt->depth[i];
527
528 v4l_bound_align_image(&cr->c.width, min_size, f->o_width,
529 ffs(min_size) - 1,
530 &cr->c.height, min_size, f->o_height,
531 halign, 64/(ALIGN(depth, 8)));
532
533 /* adjust left/top if cropping rectangle is out of bounds */
534 if (cr->c.left + cr->c.width > f->o_width)
535 cr->c.left = f->o_width - cr->c.width;
536 if (cr->c.top + cr->c.height > f->o_height)
537 cr->c.top = f->o_height - cr->c.height;
538
539 cr->c.left = round_down(cr->c.left, min_size);
540 cr->c.top = round_down(cr->c.top, fimc->variant->hor_offs_align);
541
542 dbg("l:%d, t:%d, w:%d, h:%d, f_w: %d, f_h: %d",
543 cr->c.left, cr->c.top, cr->c.width, cr->c.height,
544 f->f_width, f->f_height);
545
546 return 0;
547}
548
549static int fimc_m2m_s_crop(struct file *file, void *fh, struct v4l2_crop *cr)
550{
551 struct fimc_ctx *ctx = fh_to_ctx(fh);
552 struct fimc_dev *fimc = ctx->fimc_dev;
553 struct fimc_frame *f;
554 int ret;
555
556 ret = fimc_m2m_try_crop(ctx, cr);
557 if (ret)
558 return ret;
559
560 f = (cr->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) ?
561 &ctx->s_frame : &ctx->d_frame;
562
563 /* Check to see if scaling ratio is within supported range */
564 if (fimc_ctx_state_is_set(FIMC_DST_FMT | FIMC_SRC_FMT, ctx)) {
565 if (cr->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
566 ret = fimc_check_scaler_ratio(ctx, cr->c.width,
567 cr->c.height, ctx->d_frame.width,
568 ctx->d_frame.height, ctx->rotation);
569 } else {
570 ret = fimc_check_scaler_ratio(ctx, ctx->s_frame.width,
571 ctx->s_frame.height, cr->c.width,
572 cr->c.height, ctx->rotation);
573 }
574 if (ret) {
575 v4l2_err(fimc->m2m.vfd, "Out of scaler range\n");
576 return -EINVAL;
577 }
578 }
579
580 f->offs_h = cr->c.left;
581 f->offs_v = cr->c.top;
582 f->width = cr->c.width;
583 f->height = cr->c.height;
584
585 fimc_ctx_state_set(FIMC_PARAMS, ctx);
586
587 return 0;
588}
589
590static const struct v4l2_ioctl_ops fimc_m2m_ioctl_ops = {
591 .vidioc_querycap = fimc_m2m_querycap,
592 .vidioc_enum_fmt_vid_cap_mplane = fimc_m2m_enum_fmt_mplane,
593 .vidioc_enum_fmt_vid_out_mplane = fimc_m2m_enum_fmt_mplane,
594 .vidioc_g_fmt_vid_cap_mplane = fimc_m2m_g_fmt_mplane,
595 .vidioc_g_fmt_vid_out_mplane = fimc_m2m_g_fmt_mplane,
596 .vidioc_try_fmt_vid_cap_mplane = fimc_m2m_try_fmt_mplane,
597 .vidioc_try_fmt_vid_out_mplane = fimc_m2m_try_fmt_mplane,
598 .vidioc_s_fmt_vid_cap_mplane = fimc_m2m_s_fmt_mplane,
599 .vidioc_s_fmt_vid_out_mplane = fimc_m2m_s_fmt_mplane,
600 .vidioc_reqbufs = fimc_m2m_reqbufs,
601 .vidioc_querybuf = fimc_m2m_querybuf,
602 .vidioc_qbuf = fimc_m2m_qbuf,
603 .vidioc_dqbuf = fimc_m2m_dqbuf,
604 .vidioc_streamon = fimc_m2m_streamon,
605 .vidioc_streamoff = fimc_m2m_streamoff,
606 .vidioc_g_crop = fimc_m2m_g_crop,
607 .vidioc_s_crop = fimc_m2m_s_crop,
608 .vidioc_cropcap = fimc_m2m_cropcap
609
610};
611
612static int queue_init(void *priv, struct vb2_queue *src_vq,
613 struct vb2_queue *dst_vq)
614{
615 struct fimc_ctx *ctx = priv;
616 int ret;
617
618 memset(src_vq, 0, sizeof(*src_vq));
619 src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
620 src_vq->io_modes = VB2_MMAP | VB2_USERPTR;
621 src_vq->drv_priv = ctx;
622 src_vq->ops = &fimc_qops;
623 src_vq->mem_ops = &vb2_dma_contig_memops;
624 src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
625
626 ret = vb2_queue_init(src_vq);
627 if (ret)
628 return ret;
629
630 memset(dst_vq, 0, sizeof(*dst_vq));
631 dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
632 dst_vq->io_modes = VB2_MMAP | VB2_USERPTR;
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
641static int fimc_m2m_open(struct file *file)
642{
643 struct fimc_dev *fimc = video_drvdata(file);
644 struct fimc_ctx *ctx;
645 int ret;
646
647 dbg("pid: %d, state: 0x%lx, refcnt: %d",
648 task_pid_nr(current), fimc->state, fimc->vid_cap.refcnt);
649
650 /*
651 * Return if the corresponding video capture node
652 * is already opened.
653 */
654 if (fimc->vid_cap.refcnt > 0)
655 return -EBUSY;
656
657 ctx = kzalloc(sizeof *ctx, GFP_KERNEL);
658 if (!ctx)
659 return -ENOMEM;
660 v4l2_fh_init(&ctx->fh, fimc->m2m.vfd);
661 ctx->fimc_dev = fimc;
662
663 /* Default color format */
664 ctx->s_frame.fmt = fimc_get_format(0);
665 ctx->d_frame.fmt = fimc_get_format(0);
666
667 ret = fimc_ctrls_create(ctx);
668 if (ret)
669 goto error_fh;
670
671 /* Use separate control handler per file handle */
9448ab7d 672 ctx->fh.ctrl_handler = &ctx->ctrls.handler;
97d97422
SN		 673 file->private_data = &ctx->fh;
674 v4l2_fh_add(&ctx->fh);
675
676 /* Setup the device context for memory-to-memory mode */
677 ctx->state = FIMC_CTX_M2M;
678 ctx->flags = 0;
3d112d9a
SN		 679 ctx->in_path = FIMC_IO_DMA;
680 ctx->out_path = FIMC_IO_DMA;
97d97422
SN		 681
682 ctx->m2m_ctx = v4l2_m2m_ctx_init(fimc->m2m.m2m_dev, ctx, queue_init);
683 if (IS_ERR(ctx->m2m_ctx)) {
684 ret = PTR_ERR(ctx->m2m_ctx);
685 goto error_c;
686 }
687
688 if (fimc->m2m.refcnt++ == 0)
689 set_bit(ST_M2M_RUN, &fimc->state);
690 return 0;
691
692error_c:
693 fimc_ctrls_delete(ctx);
694error_fh:
695 v4l2_fh_del(&ctx->fh);
696 v4l2_fh_exit(&ctx->fh);
697 kfree(ctx);
698 return ret;
699}
700
701static int fimc_m2m_release(struct file *file)
702{
703 struct fimc_ctx *ctx = fh_to_ctx(file->private_data);
704 struct fimc_dev *fimc = ctx->fimc_dev;
705
706 dbg("pid: %d, state: 0x%lx, refcnt= %d",
707 task_pid_nr(current), fimc->state, fimc->m2m.refcnt);
708
709 v4l2_m2m_ctx_release(ctx->m2m_ctx);
710 fimc_ctrls_delete(ctx);
711 v4l2_fh_del(&ctx->fh);
712 v4l2_fh_exit(&ctx->fh);
713
714 if (--fimc->m2m.refcnt <= 0)
715 clear_bit(ST_M2M_RUN, &fimc->state);
716 kfree(ctx);
717 return 0;
718}
719
720static unsigned int fimc_m2m_poll(struct file *file,
721 struct poll_table_struct *wait)
722{
723 struct fimc_ctx *ctx = fh_to_ctx(file->private_data);
724
725 return v4l2_m2m_poll(file, ctx->m2m_ctx, wait);
726}
727
728
729static int fimc_m2m_mmap(struct file *file, struct vm_area_struct *vma)
730{
731 struct fimc_ctx *ctx = fh_to_ctx(file->private_data);
732
733 return v4l2_m2m_mmap(file, ctx->m2m_ctx, vma);
734}
735
736static const struct v4l2_file_operations fimc_m2m_fops = {
737 .owner = THIS_MODULE,
738 .open = fimc_m2m_open,
739 .release = fimc_m2m_release,
740 .poll = fimc_m2m_poll,
741 .unlocked_ioctl = video_ioctl2,
742 .mmap = fimc_m2m_mmap,
743};
744
745static struct v4l2_m2m_ops m2m_ops = {
746 .device_run = fimc_device_run,
747 .job_abort = fimc_job_abort,
748};
749
750int fimc_register_m2m_device(struct fimc_dev *fimc,
751 struct v4l2_device *v4l2_dev)
752{
753 struct video_device *vfd;
754 struct platform_device *pdev;
755 int ret = 0;
756
757 if (!fimc)
758 return -ENODEV;
759
760 pdev = fimc->pdev;
761 fimc->v4l2_dev = v4l2_dev;
762
763 vfd = video_device_alloc();
764 if (!vfd) {
765 v4l2_err(v4l2_dev, "Failed to allocate video device\n");
766 return -ENOMEM;
767 }
768
769 vfd->fops = &fimc_m2m_fops;
770 vfd->ioctl_ops = &fimc_m2m_ioctl_ops;
771 vfd->v4l2_dev = v4l2_dev;
772 vfd->minor = -1;
773 vfd->release = video_device_release;
774 vfd->lock = &fimc->lock;
775 /* Locking in file operations other than ioctl should be done
776 by the driver, not the V4L2 core.
777 This driver needs auditing so that this flag can be removed. */
778 set_bit(V4L2_FL_LOCK_ALL_FOPS, &vfd->flags);
779
693f5c40 780 snprintf(vfd->name, sizeof(vfd->name), "fimc.%d.m2m", fimc->id);
97d97422
SN		 781 video_set_drvdata(vfd, fimc);
782
783 fimc->m2m.vfd = vfd;
784 fimc->m2m.m2m_dev = v4l2_m2m_init(&m2m_ops);
785 if (IS_ERR(fimc->m2m.m2m_dev)) {
786 v4l2_err(v4l2_dev, "failed to initialize v4l2-m2m device\n");
787 ret = PTR_ERR(fimc->m2m.m2m_dev);
788 goto err_init;
789 }
790
791 ret = media_entity_init(&vfd->entity, 0, NULL, 0);
693f5c40
SN		 792 if (ret)
793 goto err_me;
794
795 ret = video_register_device(vfd, VFL_TYPE_GRABBER, -1);
796 if (ret)
797 goto err_vd;
798
799 v4l2_info(v4l2_dev, "Registered %s as /dev/%s\n",
800 vfd->name, video_device_node_name(vfd));
801 return 0;
97d97422 802
693f5c40
SN		 803err_vd:
804 media_entity_cleanup(&vfd->entity);
805err_me:
97d97422
SN		 806 v4l2_m2m_release(fimc->m2m.m2m_dev);
807err_init:
808 video_device_release(fimc->m2m.vfd);
809 return ret;
810}
811
812void fimc_unregister_m2m_device(struct fimc_dev *fimc)
813{
814 if (!fimc)
815 return;
816
817 if (fimc->m2m.m2m_dev)
818 v4l2_m2m_release(fimc->m2m.m2m_dev);
819 if (fimc->m2m.vfd) {
820 media_entity_cleanup(&fimc->m2m.vfd->entity);
821 /* Can also be called if video device wasn't registered */
822 video_unregister_device(fimc->m2m.vfd);
823 }
824}
Linux kernel - Deliverables
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