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Merge branch 'pm-cpufreq-fixes'
[deliverable/linux.git] / drivers / media / platform / exynos4-is / 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-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 && 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->fh.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 void 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 }
99
100 static void fimc_device_run(void *priv)
101 {
102 struct vb2_v4l2_buffer *src_vb, *dst_vb;
103 struct fimc_ctx *ctx = priv;
104 struct fimc_frame *sf, *df;
105 struct fimc_dev *fimc;
106 unsigned long flags;
107 int ret;
108
109 if (WARN(!ctx, "Null context\n"))
110 return;
111
112 fimc = ctx->fimc_dev;
113 spin_lock_irqsave(&fimc->slock, flags);
114
115 set_bit(ST_M2M_PEND, &fimc->state);
116 sf = &ctx->s_frame;
117 df = &ctx->d_frame;
118
119 if (ctx->state & FIMC_PARAMS) {
120 /* Prepare the DMA offsets for scaler */
121 fimc_prepare_dma_offset(ctx, sf);
122 fimc_prepare_dma_offset(ctx, df);
123 }
124
125 src_vb = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx);
126 ret = fimc_prepare_addr(ctx, &src_vb->vb2_buf, sf, &sf->paddr);
127 if (ret)
128 goto dma_unlock;
129
130 dst_vb = v4l2_m2m_next_dst_buf(ctx->fh.m2m_ctx);
131 ret = fimc_prepare_addr(ctx, &dst_vb->vb2_buf, df, &df->paddr);
132 if (ret)
133 goto dma_unlock;
134
135 dst_vb->vb2_buf.timestamp = src_vb->vb2_buf.timestamp;
136 dst_vb->flags &= ~V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
137 dst_vb->flags |=
138 src_vb->flags & V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
139
140 /* Reconfigure hardware if the context has changed. */
141 if (fimc->m2m.ctx != ctx) {
142 ctx->state |= FIMC_PARAMS;
143 fimc->m2m.ctx = ctx;
144 }
145
146 if (ctx->state & FIMC_PARAMS) {
147 fimc_set_yuv_order(ctx);
148 fimc_hw_set_input_path(ctx);
149 fimc_hw_set_in_dma(ctx);
150 ret = fimc_set_scaler_info(ctx);
151 if (ret)
152 goto dma_unlock;
153 fimc_hw_set_prescaler(ctx);
154 fimc_hw_set_mainscaler(ctx);
155 fimc_hw_set_target_format(ctx);
156 fimc_hw_set_rotation(ctx);
157 fimc_hw_set_effect(ctx);
158 fimc_hw_set_out_dma(ctx);
159 if (fimc->drv_data->alpha_color)
160 fimc_hw_set_rgb_alpha(ctx);
161 fimc_hw_set_output_path(ctx);
162 }
163 fimc_hw_set_input_addr(fimc, &sf->paddr);
164 fimc_hw_set_output_addr(fimc, &df->paddr, -1);
165
166 fimc_activate_capture(ctx);
167 ctx->state &= (FIMC_CTX_M2M | FIMC_CTX_CAP);
168 fimc_hw_activate_input_dma(fimc, true);
169
170 dma_unlock:
171 spin_unlock_irqrestore(&fimc->slock, flags);
172 }
173
174 static void fimc_job_abort(void *priv)
175 {
176 fimc_m2m_shutdown(priv);
177 }
178
179 static int fimc_queue_setup(struct vb2_queue *vq,
180 unsigned int *num_buffers, unsigned int *num_planes,
181 unsigned int sizes[], void *allocators[])
182 {
183 struct fimc_ctx *ctx = vb2_get_drv_priv(vq);
184 struct fimc_frame *f;
185 int i;
186
187 f = ctx_get_frame(ctx, vq->type);
188 if (IS_ERR(f))
189 return PTR_ERR(f);
190 /*
191 * Return number of non-contiguous planes (plane buffers)
192 * depending on the configured color format.
193 */
194 if (!f->fmt)
195 return -EINVAL;
196
197 *num_planes = f->fmt->memplanes;
198 for (i = 0; i < f->fmt->memplanes; i++) {
199 sizes[i] = f->payload[i];
200 allocators[i] = ctx->fimc_dev->alloc_ctx;
201 }
202 return 0;
203 }
204
205 static int fimc_buf_prepare(struct vb2_buffer *vb)
206 {
207 struct fimc_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
208 struct fimc_frame *frame;
209 int i;
210
211 frame = ctx_get_frame(ctx, vb->vb2_queue->type);
212 if (IS_ERR(frame))
213 return PTR_ERR(frame);
214
215 for (i = 0; i < frame->fmt->memplanes; i++)
216 vb2_set_plane_payload(vb, i, frame->payload[i]);
217
218 return 0;
219 }
220
221 static void fimc_buf_queue(struct vb2_buffer *vb)
222 {
223 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
224 struct fimc_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
225 v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
226 }
227
228 static struct vb2_ops fimc_qops = {
229 .queue_setup = fimc_queue_setup,
230 .buf_prepare = fimc_buf_prepare,
231 .buf_queue = fimc_buf_queue,
232 .wait_prepare = vb2_ops_wait_prepare,
233 .wait_finish = vb2_ops_wait_finish,
234 .stop_streaming = stop_streaming,
235 .start_streaming = start_streaming,
236 };
237
238 /*
239 * V4L2 ioctl handlers
240 */
241 static int fimc_m2m_querycap(struct file *file, void *fh,
242 struct v4l2_capability *cap)
243 {
244 struct fimc_dev *fimc = video_drvdata(file);
245 unsigned int caps;
246
247 /*
248 * This is only a mem-to-mem video device. The capture and output
249 * device capability flags are left only for backward compatibility
250 * and are scheduled for removal.
251 */
252 caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_M2M_MPLANE |
253 V4L2_CAP_VIDEO_CAPTURE_MPLANE | V4L2_CAP_VIDEO_OUTPUT_MPLANE;
254
255 __fimc_vidioc_querycap(&fimc->pdev->dev, cap, caps);
256 return 0;
257 }
258
259 static int fimc_m2m_enum_fmt_mplane(struct file *file, void *priv,
260 struct v4l2_fmtdesc *f)
261 {
262 struct fimc_fmt *fmt;
263
264 fmt = fimc_find_format(NULL, NULL, get_m2m_fmt_flags(f->type),
265 f->index);
266 if (!fmt)
267 return -EINVAL;
268
269 strncpy(f->description, fmt->name, sizeof(f->description) - 1);
270 f->pixelformat = fmt->fourcc;
271 return 0;
272 }
273
274 static int fimc_m2m_g_fmt_mplane(struct file *file, void *fh,
275 struct v4l2_format *f)
276 {
277 struct fimc_ctx *ctx = fh_to_ctx(fh);
278 struct fimc_frame *frame = ctx_get_frame(ctx, f->type);
279
280 if (IS_ERR(frame))
281 return PTR_ERR(frame);
282
283 __fimc_get_format(frame, f);
284 return 0;
285 }
286
287 static int fimc_try_fmt_mplane(struct fimc_ctx *ctx, struct v4l2_format *f)
288 {
289 struct fimc_dev *fimc = ctx->fimc_dev;
290 const struct fimc_variant *variant = fimc->variant;
291 struct v4l2_pix_format_mplane *pix = &f->fmt.pix_mp;
292 struct fimc_fmt *fmt;
293 u32 max_w, mod_x, mod_y;
294
295 if (!IS_M2M(f->type))
296 return -EINVAL;
297
298 fmt = fimc_find_format(&pix->pixelformat, NULL,
299 get_m2m_fmt_flags(f->type), 0);
300 if (WARN(fmt == NULL, "Pixel format lookup failed"))
301 return -EINVAL;
302
303 if (pix->field == V4L2_FIELD_ANY)
304 pix->field = V4L2_FIELD_NONE;
305 else if (pix->field != V4L2_FIELD_NONE)
306 return -EINVAL;
307
308 if (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
309 max_w = variant->pix_limit->scaler_dis_w;
310 mod_x = ffs(variant->min_inp_pixsize) - 1;
311 } else {
312 max_w = variant->pix_limit->out_rot_dis_w;
313 mod_x = ffs(variant->min_out_pixsize) - 1;
314 }
315
316 if (tiled_fmt(fmt)) {
317 mod_x = 6; /* 64 x 32 pixels tile */
318 mod_y = 5;
319 } else {
320 if (variant->min_vsize_align == 1)
321 mod_y = fimc_fmt_is_rgb(fmt->color) ? 0 : 1;
322 else
323 mod_y = ffs(variant->min_vsize_align) - 1;
324 }
325
326 v4l_bound_align_image(&pix->width, 16, max_w, mod_x,
327 &pix->height, 8, variant->pix_limit->scaler_dis_w, mod_y, 0);
328
329 fimc_adjust_mplane_format(fmt, pix->width, pix->height, &f->fmt.pix_mp);
330 return 0;
331 }
332
333 static int fimc_m2m_try_fmt_mplane(struct file *file, void *fh,
334 struct v4l2_format *f)
335 {
336 struct fimc_ctx *ctx = fh_to_ctx(fh);
337 return fimc_try_fmt_mplane(ctx, f);
338 }
339
340 static void __set_frame_format(struct fimc_frame *frame, struct fimc_fmt *fmt,
341 struct v4l2_pix_format_mplane *pixm)
342 {
343 int i;
344
345 for (i = 0; i < fmt->memplanes; i++) {
346 frame->bytesperline[i] = pixm->plane_fmt[i].bytesperline;
347 frame->payload[i] = pixm->plane_fmt[i].sizeimage;
348 }
349
350 frame->f_width = pixm->width;
351 frame->f_height = pixm->height;
352 frame->o_width = pixm->width;
353 frame->o_height = pixm->height;
354 frame->width = pixm->width;
355 frame->height = pixm->height;
356 frame->offs_h = 0;
357 frame->offs_v = 0;
358 frame->fmt = fmt;
359 }
360
361 static int fimc_m2m_s_fmt_mplane(struct file *file, void *fh,
362 struct v4l2_format *f)
363 {
364 struct fimc_ctx *ctx = fh_to_ctx(fh);
365 struct fimc_dev *fimc = ctx->fimc_dev;
366 struct fimc_fmt *fmt;
367 struct vb2_queue *vq;
368 struct fimc_frame *frame;
369 int ret;
370
371 ret = fimc_try_fmt_mplane(ctx, f);
372 if (ret)
373 return ret;
374
375 vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
376
377 if (vb2_is_busy(vq)) {
378 v4l2_err(&fimc->m2m.vfd, "queue (%d) busy\n", f->type);
379 return -EBUSY;
380 }
381
382 if (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
383 frame = &ctx->s_frame;
384 else
385 frame = &ctx->d_frame;
386
387 fmt = fimc_find_format(&f->fmt.pix_mp.pixelformat, NULL,
388 get_m2m_fmt_flags(f->type), 0);
389 if (!fmt)
390 return -EINVAL;
391
392 __set_frame_format(frame, fmt, &f->fmt.pix_mp);
393
394 /* Update RGB Alpha control state and value range */
395 fimc_alpha_ctrl_update(ctx);
396
397 return 0;
398 }
399
400 static int fimc_m2m_cropcap(struct file *file, void *fh,
401 struct v4l2_cropcap *cr)
402 {
403 struct fimc_ctx *ctx = fh_to_ctx(fh);
404 struct fimc_frame *frame;
405
406 frame = ctx_get_frame(ctx, cr->type);
407 if (IS_ERR(frame))
408 return PTR_ERR(frame);
409
410 cr->bounds.left = 0;
411 cr->bounds.top = 0;
412 cr->bounds.width = frame->o_width;
413 cr->bounds.height = frame->o_height;
414 cr->defrect = cr->bounds;
415
416 return 0;
417 }
418
419 static int fimc_m2m_g_crop(struct file *file, void *fh, struct v4l2_crop *cr)
420 {
421 struct fimc_ctx *ctx = fh_to_ctx(fh);
422 struct fimc_frame *frame;
423
424 frame = ctx_get_frame(ctx, cr->type);
425 if (IS_ERR(frame))
426 return PTR_ERR(frame);
427
428 cr->c.left = frame->offs_h;
429 cr->c.top = frame->offs_v;
430 cr->c.width = frame->width;
431 cr->c.height = frame->height;
432
433 return 0;
434 }
435
436 static int fimc_m2m_try_crop(struct fimc_ctx *ctx, struct v4l2_crop *cr)
437 {
438 struct fimc_dev *fimc = ctx->fimc_dev;
439 struct fimc_frame *f;
440 u32 min_size, halign, depth = 0;
441 int i;
442
443 if (cr->c.top < 0 || cr->c.left < 0) {
444 v4l2_err(&fimc->m2m.vfd,
445 "doesn't support negative values for top & left\n");
446 return -EINVAL;
447 }
448 if (cr->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
449 f = &ctx->d_frame;
450 else if (cr->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
451 f = &ctx->s_frame;
452 else
453 return -EINVAL;
454
455 min_size = (f == &ctx->s_frame) ?
456 fimc->variant->min_inp_pixsize : fimc->variant->min_out_pixsize;
457
458 /* Get pixel alignment constraints. */
459 if (fimc->variant->min_vsize_align == 1)
460 halign = fimc_fmt_is_rgb(f->fmt->color) ? 0 : 1;
461 else
462 halign = ffs(fimc->variant->min_vsize_align) - 1;
463
464 for (i = 0; i < f->fmt->memplanes; i++)
465 depth += f->fmt->depth[i];
466
467 v4l_bound_align_image(&cr->c.width, min_size, f->o_width,
468 ffs(min_size) - 1,
469 &cr->c.height, min_size, f->o_height,
470 halign, 64/(ALIGN(depth, 8)));
471
472 /* adjust left/top if cropping rectangle is out of bounds */
473 if (cr->c.left + cr->c.width > f->o_width)
474 cr->c.left = f->o_width - cr->c.width;
475 if (cr->c.top + cr->c.height > f->o_height)
476 cr->c.top = f->o_height - cr->c.height;
477
478 cr->c.left = round_down(cr->c.left, min_size);
479 cr->c.top = round_down(cr->c.top, fimc->variant->hor_offs_align);
480
481 dbg("l:%d, t:%d, w:%d, h:%d, f_w: %d, f_h: %d",
482 cr->c.left, cr->c.top, cr->c.width, cr->c.height,
483 f->f_width, f->f_height);
484
485 return 0;
486 }
487
488 static int fimc_m2m_s_crop(struct file *file, void *fh, const struct v4l2_crop *crop)
489 {
490 struct fimc_ctx *ctx = fh_to_ctx(fh);
491 struct fimc_dev *fimc = ctx->fimc_dev;
492 struct v4l2_crop cr = *crop;
493 struct fimc_frame *f;
494 int ret;
495
496 ret = fimc_m2m_try_crop(ctx, &cr);
497 if (ret)
498 return ret;
499
500 f = (cr.type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) ?
501 &ctx->s_frame : &ctx->d_frame;
502
503 /* Check to see if scaling ratio is within supported range */
504 if (cr.type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
505 ret = fimc_check_scaler_ratio(ctx, cr.c.width,
506 cr.c.height, ctx->d_frame.width,
507 ctx->d_frame.height, ctx->rotation);
508 } else {
509 ret = fimc_check_scaler_ratio(ctx, ctx->s_frame.width,
510 ctx->s_frame.height, cr.c.width,
511 cr.c.height, ctx->rotation);
512 }
513 if (ret) {
514 v4l2_err(&fimc->m2m.vfd, "Out of scaler range\n");
515 return -EINVAL;
516 }
517
518 f->offs_h = cr.c.left;
519 f->offs_v = cr.c.top;
520 f->width = cr.c.width;
521 f->height = cr.c.height;
522
523 fimc_ctx_state_set(FIMC_PARAMS, ctx);
524
525 return 0;
526 }
527
528 static const struct v4l2_ioctl_ops fimc_m2m_ioctl_ops = {
529 .vidioc_querycap = fimc_m2m_querycap,
530 .vidioc_enum_fmt_vid_cap_mplane = fimc_m2m_enum_fmt_mplane,
531 .vidioc_enum_fmt_vid_out_mplane = fimc_m2m_enum_fmt_mplane,
532 .vidioc_g_fmt_vid_cap_mplane = fimc_m2m_g_fmt_mplane,
533 .vidioc_g_fmt_vid_out_mplane = fimc_m2m_g_fmt_mplane,
534 .vidioc_try_fmt_vid_cap_mplane = fimc_m2m_try_fmt_mplane,
535 .vidioc_try_fmt_vid_out_mplane = fimc_m2m_try_fmt_mplane,
536 .vidioc_s_fmt_vid_cap_mplane = fimc_m2m_s_fmt_mplane,
537 .vidioc_s_fmt_vid_out_mplane = fimc_m2m_s_fmt_mplane,
538 .vidioc_reqbufs = v4l2_m2m_ioctl_reqbufs,
539 .vidioc_querybuf = v4l2_m2m_ioctl_querybuf,
540 .vidioc_qbuf = v4l2_m2m_ioctl_qbuf,
541 .vidioc_dqbuf = v4l2_m2m_ioctl_dqbuf,
542 .vidioc_expbuf = v4l2_m2m_ioctl_expbuf,
543 .vidioc_streamon = v4l2_m2m_ioctl_streamon,
544 .vidioc_streamoff = v4l2_m2m_ioctl_streamoff,
545 .vidioc_g_crop = fimc_m2m_g_crop,
546 .vidioc_s_crop = fimc_m2m_s_crop,
547 .vidioc_cropcap = fimc_m2m_cropcap
548
549 };
550
551 static int queue_init(void *priv, struct vb2_queue *src_vq,
552 struct vb2_queue *dst_vq)
553 {
554 struct fimc_ctx *ctx = priv;
555 int ret;
556
557 src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
558 src_vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
559 src_vq->drv_priv = ctx;
560 src_vq->ops = &fimc_qops;
561 src_vq->mem_ops = &vb2_dma_contig_memops;
562 src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
563 src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
564 src_vq->lock = &ctx->fimc_dev->lock;
565
566 ret = vb2_queue_init(src_vq);
567 if (ret)
568 return ret;
569
570 dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
571 dst_vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
572 dst_vq->drv_priv = ctx;
573 dst_vq->ops = &fimc_qops;
574 dst_vq->mem_ops = &vb2_dma_contig_memops;
575 dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
576 dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
577 dst_vq->lock = &ctx->fimc_dev->lock;
578
579 return vb2_queue_init(dst_vq);
580 }
581
582 static int fimc_m2m_set_default_format(struct fimc_ctx *ctx)
583 {
584 struct v4l2_pix_format_mplane pixm = {
585 .pixelformat = V4L2_PIX_FMT_RGB32,
586 .width = 800,
587 .height = 600,
588 .plane_fmt[0] = {
589 .bytesperline = 800 * 4,
590 .sizeimage = 800 * 4 * 600,
591 },
592 };
593 struct fimc_fmt *fmt;
594
595 fmt = fimc_find_format(&pixm.pixelformat, NULL, FMT_FLAGS_M2M, 0);
596 if (!fmt)
597 return -EINVAL;
598
599 __set_frame_format(&ctx->s_frame, fmt, &pixm);
600 __set_frame_format(&ctx->d_frame, fmt, &pixm);
601
602 return 0;
603 }
604
605 static int fimc_m2m_open(struct file *file)
606 {
607 struct fimc_dev *fimc = video_drvdata(file);
608 struct fimc_ctx *ctx;
609 int ret = -EBUSY;
610
611 pr_debug("pid: %d, state: %#lx\n", task_pid_nr(current), fimc->state);
612
613 if (mutex_lock_interruptible(&fimc->lock))
614 return -ERESTARTSYS;
615 /*
616 * Don't allow simultaneous open() of the mem-to-mem and the
617 * capture video node that belong to same FIMC IP instance.
618 */
619 if (test_bit(ST_CAPT_BUSY, &fimc->state))
620 goto unlock;
621
622 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
623 if (!ctx) {
624 ret = -ENOMEM;
625 goto unlock;
626 }
627 v4l2_fh_init(&ctx->fh, &fimc->m2m.vfd);
628 ctx->fimc_dev = fimc;
629
630 /* Default color format */
631 ctx->s_frame.fmt = fimc_get_format(0);
632 ctx->d_frame.fmt = fimc_get_format(0);
633
634 ret = fimc_ctrls_create(ctx);
635 if (ret)
636 goto error_fh;
637
638 /* Use separate control handler per file handle */
639 ctx->fh.ctrl_handler = &ctx->ctrls.handler;
640 file->private_data = &ctx->fh;
641 v4l2_fh_add(&ctx->fh);
642
643 /* Setup the device context for memory-to-memory mode */
644 ctx->state = FIMC_CTX_M2M;
645 ctx->flags = 0;
646 ctx->in_path = FIMC_IO_DMA;
647 ctx->out_path = FIMC_IO_DMA;
648 ctx->scaler.enabled = 1;
649
650 ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(fimc->m2m.m2m_dev, ctx, queue_init);
651 if (IS_ERR(ctx->fh.m2m_ctx)) {
652 ret = PTR_ERR(ctx->fh.m2m_ctx);
653 goto error_c;
654 }
655
656 if (fimc->m2m.refcnt++ == 0)
657 set_bit(ST_M2M_RUN, &fimc->state);
658
659 ret = fimc_m2m_set_default_format(ctx);
660 if (ret < 0)
661 goto error_m2m_ctx;
662
663 mutex_unlock(&fimc->lock);
664 return 0;
665
666 error_m2m_ctx:
667 v4l2_m2m_ctx_release(ctx->fh.m2m_ctx);
668 error_c:
669 fimc_ctrls_delete(ctx);
670 error_fh:
671 v4l2_fh_del(&ctx->fh);
672 v4l2_fh_exit(&ctx->fh);
673 kfree(ctx);
674 unlock:
675 mutex_unlock(&fimc->lock);
676 return ret;
677 }
678
679 static int fimc_m2m_release(struct file *file)
680 {
681 struct fimc_ctx *ctx = fh_to_ctx(file->private_data);
682 struct fimc_dev *fimc = ctx->fimc_dev;
683
684 dbg("pid: %d, state: 0x%lx, refcnt= %d",
685 task_pid_nr(current), fimc->state, fimc->m2m.refcnt);
686
687 mutex_lock(&fimc->lock);
688
689 v4l2_m2m_ctx_release(ctx->fh.m2m_ctx);
690 fimc_ctrls_delete(ctx);
691 v4l2_fh_del(&ctx->fh);
692 v4l2_fh_exit(&ctx->fh);
693
694 if (--fimc->m2m.refcnt <= 0)
695 clear_bit(ST_M2M_RUN, &fimc->state);
696 kfree(ctx);
697
698 mutex_unlock(&fimc->lock);
699 return 0;
700 }
701
702 static const struct v4l2_file_operations fimc_m2m_fops = {
703 .owner = THIS_MODULE,
704 .open = fimc_m2m_open,
705 .release = fimc_m2m_release,
706 .poll = v4l2_m2m_fop_poll,
707 .unlocked_ioctl = video_ioctl2,
708 .mmap = v4l2_m2m_fop_mmap,
709 };
710
711 static struct v4l2_m2m_ops m2m_ops = {
712 .device_run = fimc_device_run,
713 .job_abort = fimc_job_abort,
714 };
715
716 int fimc_register_m2m_device(struct fimc_dev *fimc,
717 struct v4l2_device *v4l2_dev)
718 {
719 struct video_device *vfd = &fimc->m2m.vfd;
720 int ret;
721
722 fimc->v4l2_dev = v4l2_dev;
723
724 memset(vfd, 0, sizeof(*vfd));
725 vfd->fops = &fimc_m2m_fops;
726 vfd->ioctl_ops = &fimc_m2m_ioctl_ops;
727 vfd->v4l2_dev = v4l2_dev;
728 vfd->minor = -1;
729 vfd->release = video_device_release_empty;
730 vfd->lock = &fimc->lock;
731 vfd->vfl_dir = VFL_DIR_M2M;
732
733 snprintf(vfd->name, sizeof(vfd->name), "fimc.%d.m2m", fimc->id);
734 video_set_drvdata(vfd, fimc);
735
736 fimc->m2m.m2m_dev = v4l2_m2m_init(&m2m_ops);
737 if (IS_ERR(fimc->m2m.m2m_dev)) {
738 v4l2_err(v4l2_dev, "failed to initialize v4l2-m2m device\n");
739 return PTR_ERR(fimc->m2m.m2m_dev);
740 }
741
742 ret = media_entity_pads_init(&vfd->entity, 0, NULL);
743 if (ret)
744 goto err_me;
745
746 ret = video_register_device(vfd, VFL_TYPE_GRABBER, -1);
747 if (ret)
748 goto err_vd;
749
750 v4l2_info(v4l2_dev, "Registered %s as /dev/%s\n",
751 vfd->name, video_device_node_name(vfd));
752 return 0;
753
754 err_vd:
755 media_entity_cleanup(&vfd->entity);
756 err_me:
757 v4l2_m2m_release(fimc->m2m.m2m_dev);
758 return ret;
759 }
760
761 void fimc_unregister_m2m_device(struct fimc_dev *fimc)
762 {
763 if (!fimc)
764 return;
765
766 if (fimc->m2m.m2m_dev)
767 v4l2_m2m_release(fimc->m2m.m2m_dev);
768
769 if (video_is_registered(&fimc->m2m.vfd)) {
770 video_unregister_device(&fimc->m2m.vfd);
771 media_entity_cleanup(&fimc->m2m.vfd.entity);
772 }
773 }
Linux kernel - Deliverables
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