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gpio: rcar: Fix runtime PM imbalance on error
[linux/fpc-iii.git] / drivers / media / platform / exynos4-is / fimc-m2m.c
blob4acb179556c4126f687143acd2b1679b3f17254d
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Samsung S5P/EXYNOS4 SoC series FIMC (video postprocessor) driver
4 *
5 * Copyright (C) 2012 - 2013 Samsung Electronics Co., Ltd.
6 * Sylwester Nawrocki <s.nawrocki@samsung.com>
7 */
8
9 #include <linux/module.h>
10 #include <linux/kernel.h>
11 #include <linux/types.h>
12 #include <linux/errno.h>
13 #include <linux/bug.h>
14 #include <linux/interrupt.h>
15 #include <linux/device.h>
16 #include <linux/platform_device.h>
17 #include <linux/pm_runtime.h>
18 #include <linux/list.h>
19 #include <linux/io.h>
20 #include <linux/slab.h>
21 #include <linux/clk.h>
22 #include <media/v4l2-ioctl.h>
23 #include <media/videobuf2-v4l2.h>
24 #include <media/videobuf2-dma-contig.h>
25
26 #include "common.h"
27 #include "fimc-core.h"
28 #include "fimc-reg.h"
29 #include "media-dev.h"
30
31 static unsigned int get_m2m_fmt_flags(unsigned int stream_type)
32 {
33 if (stream_type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
34 return FMT_FLAGS_M2M_IN;
35 else
36 return FMT_FLAGS_M2M_OUT;
37 }
38
39 void fimc_m2m_job_finish(struct fimc_ctx *ctx, int vb_state)
40 {
41 struct vb2_v4l2_buffer *src_vb, *dst_vb;
42
43 if (!ctx || !ctx->fh.m2m_ctx)
44 return;
45
46 src_vb = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
47 dst_vb = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
48
49 if (src_vb)
50 v4l2_m2m_buf_done(src_vb, vb_state);
51 if (dst_vb)
52 v4l2_m2m_buf_done(dst_vb, vb_state);
53 if (src_vb && dst_vb)
54 v4l2_m2m_job_finish(ctx->fimc_dev->m2m.m2m_dev,
55 ctx->fh.m2m_ctx);
56 }
57
58 /* Complete the transaction which has been scheduled for execution. */
59 static void fimc_m2m_shutdown(struct fimc_ctx *ctx)
60 {
61 struct fimc_dev *fimc = ctx->fimc_dev;
62
63 if (!fimc_m2m_pending(fimc))
64 return;
65
66 fimc_ctx_state_set(FIMC_CTX_SHUT, ctx);
67
68 wait_event_timeout(fimc->irq_queue,
69 !fimc_ctx_state_is_set(FIMC_CTX_SHUT, ctx),
70 FIMC_SHUTDOWN_TIMEOUT);
71 }
72
73 static int start_streaming(struct vb2_queue *q, unsigned int count)
74 {
75 struct fimc_ctx *ctx = q->drv_priv;
76 int ret;
77
78 ret = pm_runtime_get_sync(&ctx->fimc_dev->pdev->dev);
79 return ret > 0 ? 0 : ret;
80 }
81
82 static void stop_streaming(struct vb2_queue *q)
83 {
84 struct fimc_ctx *ctx = q->drv_priv;
85
86
87 fimc_m2m_shutdown(ctx);
88 fimc_m2m_job_finish(ctx, VB2_BUF_STATE_ERROR);
89 pm_runtime_put(&ctx->fimc_dev->pdev->dev);
90 }
91
92 static void fimc_device_run(void *priv)
93 {
94 struct vb2_v4l2_buffer *src_vb, *dst_vb;
95 struct fimc_ctx *ctx = priv;
96 struct fimc_frame *sf, *df;
97 struct fimc_dev *fimc;
98 unsigned long flags;
99 int ret;
100
101 if (WARN(!ctx, "Null context\n"))
102 return;
103
104 fimc = ctx->fimc_dev;
105 spin_lock_irqsave(&fimc->slock, flags);
106
107 set_bit(ST_M2M_PEND, &fimc->state);
108 sf = &ctx->s_frame;
109 df = &ctx->d_frame;
110
111 if (ctx->state & FIMC_PARAMS) {
112 /* Prepare the DMA offsets for scaler */
113 fimc_prepare_dma_offset(ctx, sf);
114 fimc_prepare_dma_offset(ctx, df);
115 }
116
117 src_vb = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx);
118 ret = fimc_prepare_addr(ctx, &src_vb->vb2_buf, sf, &sf->paddr);
119 if (ret)
120 goto dma_unlock;
121
122 dst_vb = v4l2_m2m_next_dst_buf(ctx->fh.m2m_ctx);
123 ret = fimc_prepare_addr(ctx, &dst_vb->vb2_buf, df, &df->paddr);
124 if (ret)
125 goto dma_unlock;
126
127 dst_vb->vb2_buf.timestamp = src_vb->vb2_buf.timestamp;
128 dst_vb->flags &= ~V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
129 dst_vb->flags |=
130 src_vb->flags & V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
131
132 /* Reconfigure hardware if the context has changed. */
133 if (fimc->m2m.ctx != ctx) {
134 ctx->state |= FIMC_PARAMS;
135 fimc->m2m.ctx = ctx;
136 }
137
138 if (ctx->state & FIMC_PARAMS) {
139 fimc_set_yuv_order(ctx);
140 fimc_hw_set_input_path(ctx);
141 fimc_hw_set_in_dma(ctx);
142 ret = fimc_set_scaler_info(ctx);
143 if (ret)
144 goto dma_unlock;
145 fimc_hw_set_prescaler(ctx);
146 fimc_hw_set_mainscaler(ctx);
147 fimc_hw_set_target_format(ctx);
148 fimc_hw_set_rotation(ctx);
149 fimc_hw_set_effect(ctx);
150 fimc_hw_set_out_dma(ctx);
151 if (fimc->drv_data->alpha_color)
152 fimc_hw_set_rgb_alpha(ctx);
153 fimc_hw_set_output_path(ctx);
154 }
155 fimc_hw_set_input_addr(fimc, &sf->paddr);
156 fimc_hw_set_output_addr(fimc, &df->paddr, -1);
157
158 fimc_activate_capture(ctx);
159 ctx->state &= (FIMC_CTX_M2M | FIMC_CTX_CAP);
160 fimc_hw_activate_input_dma(fimc, true);
161
162 dma_unlock:
163 spin_unlock_irqrestore(&fimc->slock, flags);
164 }
165
166 static void fimc_job_abort(void *priv)
167 {
168 fimc_m2m_shutdown(priv);
169 }
170
171 static int fimc_queue_setup(struct vb2_queue *vq,
172 unsigned int *num_buffers, unsigned int *num_planes,
173 unsigned int sizes[], struct device *alloc_devs[])
174 {
175 struct fimc_ctx *ctx = vb2_get_drv_priv(vq);
176 struct fimc_frame *f;
177 int i;
178
179 f = ctx_get_frame(ctx, vq->type);
180 if (IS_ERR(f))
181 return PTR_ERR(f);
182 /*
183 * Return number of non-contiguous planes (plane buffers)
184 * depending on the configured color format.
185 */
186 if (!f->fmt)
187 return -EINVAL;
188
189 *num_planes = f->fmt->memplanes;
190 for (i = 0; i < f->fmt->memplanes; i++)
191 sizes[i] = f->payload[i];
192 return 0;
193 }
194
195 static int fimc_buf_prepare(struct vb2_buffer *vb)
196 {
197 struct fimc_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
198 struct fimc_frame *frame;
199 int i;
200
201 frame = ctx_get_frame(ctx, vb->vb2_queue->type);
202 if (IS_ERR(frame))
203 return PTR_ERR(frame);
204
205 for (i = 0; i < frame->fmt->memplanes; i++)
206 vb2_set_plane_payload(vb, i, frame->payload[i]);
207
208 return 0;
209 }
210
211 static void fimc_buf_queue(struct vb2_buffer *vb)
212 {
213 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
214 struct fimc_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
215 v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
216 }
217
218 static const struct vb2_ops fimc_qops = {
219 .queue_setup = fimc_queue_setup,
220 .buf_prepare = fimc_buf_prepare,
221 .buf_queue = fimc_buf_queue,
222 .wait_prepare = vb2_ops_wait_prepare,
223 .wait_finish = vb2_ops_wait_finish,
224 .stop_streaming = stop_streaming,
225 .start_streaming = start_streaming,
226 };
227
228 /*
229 * V4L2 ioctl handlers
230 */
231 static int fimc_m2m_querycap(struct file *file, void *fh,
232 struct v4l2_capability *cap)
233 {
234 struct fimc_dev *fimc = video_drvdata(file);
235
236 __fimc_vidioc_querycap(&fimc->pdev->dev, cap);
237 return 0;
238 }
239
240 static int fimc_m2m_enum_fmt(struct file *file, void *priv,
241 struct v4l2_fmtdesc *f)
242 {
243 struct fimc_fmt *fmt;
244
245 fmt = fimc_find_format(NULL, NULL, get_m2m_fmt_flags(f->type),
246 f->index);
247 if (!fmt)
248 return -EINVAL;
249
250 f->pixelformat = fmt->fourcc;
251 return 0;
252 }
253
254 static int fimc_m2m_g_fmt_mplane(struct file *file, void *fh,
255 struct v4l2_format *f)
256 {
257 struct fimc_ctx *ctx = fh_to_ctx(fh);
258 struct fimc_frame *frame = ctx_get_frame(ctx, f->type);
259
260 if (IS_ERR(frame))
261 return PTR_ERR(frame);
262
263 __fimc_get_format(frame, f);
264 return 0;
265 }
266
267 static int fimc_try_fmt_mplane(struct fimc_ctx *ctx, struct v4l2_format *f)
268 {
269 struct fimc_dev *fimc = ctx->fimc_dev;
270 const struct fimc_variant *variant = fimc->variant;
271 struct v4l2_pix_format_mplane *pix = &f->fmt.pix_mp;
272 struct fimc_fmt *fmt;
273 u32 max_w, mod_x, mod_y;
274
275 if (!IS_M2M(f->type))
276 return -EINVAL;
277
278 fmt = fimc_find_format(&pix->pixelformat, NULL,
279 get_m2m_fmt_flags(f->type), 0);
280 if (WARN(fmt == NULL, "Pixel format lookup failed"))
281 return -EINVAL;
282
283 if (pix->field == V4L2_FIELD_ANY)
284 pix->field = V4L2_FIELD_NONE;
285 else if (pix->field != V4L2_FIELD_NONE)
286 return -EINVAL;
287
288 if (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
289 max_w = variant->pix_limit->scaler_dis_w;
290 mod_x = ffs(variant->min_inp_pixsize) - 1;
291 } else {
292 max_w = variant->pix_limit->out_rot_dis_w;
293 mod_x = ffs(variant->min_out_pixsize) - 1;
294 }
295
296 if (tiled_fmt(fmt)) {
297 mod_x = 6; /* 64 x 32 pixels tile */
298 mod_y = 5;
299 } else {
300 if (variant->min_vsize_align == 1)
301 mod_y = fimc_fmt_is_rgb(fmt->color) ? 0 : 1;
302 else
303 mod_y = ffs(variant->min_vsize_align) - 1;
304 }
305
306 v4l_bound_align_image(&pix->width, 16, max_w, mod_x,
307 &pix->height, 8, variant->pix_limit->scaler_dis_w, mod_y, 0);
308
309 fimc_adjust_mplane_format(fmt, pix->width, pix->height, &f->fmt.pix_mp);
310 return 0;
311 }
312
313 static int fimc_m2m_try_fmt_mplane(struct file *file, void *fh,
314 struct v4l2_format *f)
315 {
316 struct fimc_ctx *ctx = fh_to_ctx(fh);
317 return fimc_try_fmt_mplane(ctx, f);
318 }
319
320 static void __set_frame_format(struct fimc_frame *frame, struct fimc_fmt *fmt,
321 struct v4l2_pix_format_mplane *pixm)
322 {
323 int i;
324
325 for (i = 0; i < fmt->memplanes; i++) {
326 frame->bytesperline[i] = pixm->plane_fmt[i].bytesperline;
327 frame->payload[i] = pixm->plane_fmt[i].sizeimage;
328 }
329
330 frame->f_width = pixm->width;
331 frame->f_height = pixm->height;
332 frame->o_width = pixm->width;
333 frame->o_height = pixm->height;
334 frame->width = pixm->width;
335 frame->height = pixm->height;
336 frame->offs_h = 0;
337 frame->offs_v = 0;
338 frame->fmt = fmt;
339 }
340
341 static int fimc_m2m_s_fmt_mplane(struct file *file, void *fh,
342 struct v4l2_format *f)
343 {
344 struct fimc_ctx *ctx = fh_to_ctx(fh);
345 struct fimc_dev *fimc = ctx->fimc_dev;
346 struct fimc_fmt *fmt;
347 struct vb2_queue *vq;
348 struct fimc_frame *frame;
349 int ret;
350
351 ret = fimc_try_fmt_mplane(ctx, f);
352 if (ret)
353 return ret;
354
355 vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
356
357 if (vb2_is_busy(vq)) {
358 v4l2_err(&fimc->m2m.vfd, "queue (%d) busy\n", f->type);
359 return -EBUSY;
360 }
361
362 if (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
363 frame = &ctx->s_frame;
364 else
365 frame = &ctx->d_frame;
366
367 fmt = fimc_find_format(&f->fmt.pix_mp.pixelformat, NULL,
368 get_m2m_fmt_flags(f->type), 0);
369 if (!fmt)
370 return -EINVAL;
371
372 __set_frame_format(frame, fmt, &f->fmt.pix_mp);
373
374 /* Update RGB Alpha control state and value range */
375 fimc_alpha_ctrl_update(ctx);
376
377 return 0;
378 }
379
380 static int fimc_m2m_g_selection(struct file *file, void *fh,
381 struct v4l2_selection *s)
382 {
383 struct fimc_ctx *ctx = fh_to_ctx(fh);
384 struct fimc_frame *frame;
385
386 frame = ctx_get_frame(ctx, s->type);
387 if (IS_ERR(frame))
388 return PTR_ERR(frame);
389
390 switch (s->target) {
391 case V4L2_SEL_TGT_CROP:
392 case V4L2_SEL_TGT_CROP_DEFAULT:
393 case V4L2_SEL_TGT_CROP_BOUNDS:
394 if (s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
395 return -EINVAL;
396 break;
397 case V4L2_SEL_TGT_COMPOSE:
398 case V4L2_SEL_TGT_COMPOSE_DEFAULT:
399 case V4L2_SEL_TGT_COMPOSE_BOUNDS:
400 if (s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
401 return -EINVAL;
402 break;
403 default:
404 return -EINVAL;
405 }
406
407 switch (s->target) {
408 case V4L2_SEL_TGT_CROP:
409 case V4L2_SEL_TGT_COMPOSE:
410 s->r.left = frame->offs_h;
411 s->r.top = frame->offs_v;
412 s->r.width = frame->width;
413 s->r.height = frame->height;
414 break;
415 case V4L2_SEL_TGT_CROP_DEFAULT:
416 case V4L2_SEL_TGT_CROP_BOUNDS:
417 case V4L2_SEL_TGT_COMPOSE_DEFAULT:
418 case V4L2_SEL_TGT_COMPOSE_BOUNDS:
419 s->r.left = 0;
420 s->r.top = 0;
421 s->r.width = frame->o_width;
422 s->r.height = frame->o_height;
423 break;
424 default:
425 return -EINVAL;
426 }
427 return 0;
428 }
429
430 static int fimc_m2m_try_selection(struct fimc_ctx *ctx,
431 struct v4l2_selection *s)
432 {
433 struct fimc_dev *fimc = ctx->fimc_dev;
434 struct fimc_frame *f;
435 u32 min_size, halign, depth = 0;
436 int i;
437
438 if (s->r.top < 0 || s->r.left < 0) {
439 v4l2_err(&fimc->m2m.vfd,
440 "doesn't support negative values for top & left\n");
441 return -EINVAL;
442 }
443 if (s->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
444 f = &ctx->d_frame;
445 if (s->target != V4L2_SEL_TGT_COMPOSE)
446 return -EINVAL;
447 } else if (s->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
448 f = &ctx->s_frame;
449 if (s->target != V4L2_SEL_TGT_CROP)
450 return -EINVAL;
451 } else {
452 return -EINVAL;
453 }
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(&s->r.width, min_size, f->o_width,
468 ffs(min_size) - 1,
469 &s->r.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 (s->r.left + s->r.width > f->o_width)
474 s->r.left = f->o_width - s->r.width;
475 if (s->r.top + s->r.height > f->o_height)
476 s->r.top = f->o_height - s->r.height;
477
478 s->r.left = round_down(s->r.left, min_size);
479 s->r.top = round_down(s->r.top, fimc->variant->hor_offs_align);
480
481 dbg("l:%d, t:%d, w:%d, h:%d, f_w: %d, f_h: %d",
482 s->r.left, s->r.top, s->r.width, s->r.height,
483 f->f_width, f->f_height);
484
485 return 0;
486 }
487
488 static int fimc_m2m_s_selection(struct file *file, void *fh,
489 struct v4l2_selection *s)
490 {
491 struct fimc_ctx *ctx = fh_to_ctx(fh);
492 struct fimc_dev *fimc = ctx->fimc_dev;
493 struct fimc_frame *f;
494 int ret;
495
496 ret = fimc_m2m_try_selection(ctx, s);
497 if (ret)
498 return ret;
499
500 f = (s->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) ?
501 &ctx->s_frame : &ctx->d_frame;
502
503 /* Check to see if scaling ratio is within supported range */
504 if (s->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
505 ret = fimc_check_scaler_ratio(ctx, s->r.width,
506 s->r.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, s->r.width,
511 s->r.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 = s->r.left;
519 f->offs_v = s->r.top;
520 f->width = s->r.width;
521 f->height = s->r.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 = fimc_m2m_enum_fmt,
531 .vidioc_enum_fmt_vid_out = fimc_m2m_enum_fmt,
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_selection = fimc_m2m_g_selection,
546 .vidioc_s_selection = fimc_m2m_s_selection,
547
548 };
549
550 static int queue_init(void *priv, struct vb2_queue *src_vq,
551 struct vb2_queue *dst_vq)
552 {
553 struct fimc_ctx *ctx = priv;
554 int ret;
555
556 src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
557 src_vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
558 src_vq->drv_priv = ctx;
559 src_vq->ops = &fimc_qops;
560 src_vq->mem_ops = &vb2_dma_contig_memops;
561 src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
562 src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
563 src_vq->lock = &ctx->fimc_dev->lock;
564 src_vq->dev = &ctx->fimc_dev->pdev->dev;
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 dst_vq->dev = &ctx->fimc_dev->pdev->dev;
579
580 return vb2_queue_init(dst_vq);
581 }
582
583 static int fimc_m2m_set_default_format(struct fimc_ctx *ctx)
584 {
585 struct v4l2_pix_format_mplane pixm = {
586 .pixelformat = V4L2_PIX_FMT_RGB32,
587 .width = 800,
588 .height = 600,
589 .plane_fmt[0] = {
590 .bytesperline = 800 * 4,
591 .sizeimage = 800 * 4 * 600,
592 },
593 };
594 struct fimc_fmt *fmt;
595
596 fmt = fimc_find_format(&pixm.pixelformat, NULL, FMT_FLAGS_M2M, 0);
597 if (!fmt)
598 return -EINVAL;
599
600 __set_frame_format(&ctx->s_frame, fmt, &pixm);
601 __set_frame_format(&ctx->d_frame, fmt, &pixm);
602
603 return 0;
604 }
605
606 static int fimc_m2m_open(struct file *file)
607 {
608 struct fimc_dev *fimc = video_drvdata(file);
609 struct fimc_ctx *ctx;
610 int ret = -EBUSY;
611
612 pr_debug("pid: %d, state: %#lx\n", task_pid_nr(current), fimc->state);
613
614 if (mutex_lock_interruptible(&fimc->lock))
615 return -ERESTARTSYS;
616 /*
617 * Don't allow simultaneous open() of the mem-to-mem and the
618 * capture video node that belong to same FIMC IP instance.
619 */
620 if (test_bit(ST_CAPT_BUSY, &fimc->state))
621 goto unlock;
622
623 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
624 if (!ctx) {
625 ret = -ENOMEM;
626 goto unlock;
627 }
628 v4l2_fh_init(&ctx->fh, &fimc->m2m.vfd);
629 ctx->fimc_dev = fimc;
630
631 /* Default color format */
632 ctx->s_frame.fmt = fimc_get_format(0);
633 ctx->d_frame.fmt = fimc_get_format(0);
634
635 ret = fimc_ctrls_create(ctx);
636 if (ret)
637 goto error_fh;
638
639 /* Use separate control handler per file handle */
640 ctx->fh.ctrl_handler = &ctx->ctrls.handler;
641 file->private_data = &ctx->fh;
642 v4l2_fh_add(&ctx->fh);
643
644 /* Setup the device context for memory-to-memory mode */
645 ctx->state = FIMC_CTX_M2M;
646 ctx->flags = 0;
647 ctx->in_path = FIMC_IO_DMA;
648 ctx->out_path = FIMC_IO_DMA;
649 ctx->scaler.enabled = 1;
650
651 ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(fimc->m2m.m2m_dev, ctx, queue_init);
652 if (IS_ERR(ctx->fh.m2m_ctx)) {
653 ret = PTR_ERR(ctx->fh.m2m_ctx);
654 goto error_c;
655 }
656
657 if (fimc->m2m.refcnt++ == 0)
658 set_bit(ST_M2M_RUN, &fimc->state);
659
660 ret = fimc_m2m_set_default_format(ctx);
661 if (ret < 0)
662 goto error_m2m_ctx;
663
664 mutex_unlock(&fimc->lock);
665 return 0;
666
667 error_m2m_ctx:
668 v4l2_m2m_ctx_release(ctx->fh.m2m_ctx);
669 error_c:
670 fimc_ctrls_delete(ctx);
671 v4l2_fh_del(&ctx->fh);
672 error_fh:
673 v4l2_fh_exit(&ctx->fh);
674 kfree(ctx);
675 unlock:
676 mutex_unlock(&fimc->lock);
677 return ret;
678 }
679
680 static int fimc_m2m_release(struct file *file)
681 {
682 struct fimc_ctx *ctx = fh_to_ctx(file->private_data);
683 struct fimc_dev *fimc = ctx->fimc_dev;
684
685 dbg("pid: %d, state: 0x%lx, refcnt= %d",
686 task_pid_nr(current), fimc->state, fimc->m2m.refcnt);
687
688 mutex_lock(&fimc->lock);
689
690 v4l2_m2m_ctx_release(ctx->fh.m2m_ctx);
691 fimc_ctrls_delete(ctx);
692 v4l2_fh_del(&ctx->fh);
693 v4l2_fh_exit(&ctx->fh);
694
695 if (--fimc->m2m.refcnt <= 0)
696 clear_bit(ST_M2M_RUN, &fimc->state);
697 kfree(ctx);
698
699 mutex_unlock(&fimc->lock);
700 return 0;
701 }
702
703 static const struct v4l2_file_operations fimc_m2m_fops = {
704 .owner = THIS_MODULE,
705 .open = fimc_m2m_open,
706 .release = fimc_m2m_release,
707 .poll = v4l2_m2m_fop_poll,
708 .unlocked_ioctl = video_ioctl2,
709 .mmap = v4l2_m2m_fop_mmap,
710 };
711
712 static const struct v4l2_m2m_ops m2m_ops = {
713 .device_run = fimc_device_run,
714 .job_abort = fimc_job_abort,
715 };
716
717 int fimc_register_m2m_device(struct fimc_dev *fimc,
718 struct v4l2_device *v4l2_dev)
719 {
720 struct video_device *vfd = &fimc->m2m.vfd;
721 int ret;
722
723 fimc->v4l2_dev = v4l2_dev;
724
725 memset(vfd, 0, sizeof(*vfd));
726 vfd->fops = &fimc_m2m_fops;
727 vfd->ioctl_ops = &fimc_m2m_ioctl_ops;
728 vfd->v4l2_dev = v4l2_dev;
729 vfd->minor = -1;
730 vfd->release = video_device_release_empty;
731 vfd->lock = &fimc->lock;
732 vfd->vfl_dir = VFL_DIR_M2M;
733 vfd->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_M2M_MPLANE;
734 set_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags);
735
736 snprintf(vfd->name, sizeof(vfd->name), "fimc.%d.m2m", fimc->id);
737 video_set_drvdata(vfd, fimc);
738
739 fimc->m2m.m2m_dev = v4l2_m2m_init(&m2m_ops);
740 if (IS_ERR(fimc->m2m.m2m_dev)) {
741 v4l2_err(v4l2_dev, "failed to initialize v4l2-m2m device\n");
742 return PTR_ERR(fimc->m2m.m2m_dev);
743 }
744
745 ret = media_entity_pads_init(&vfd->entity, 0, NULL);
746 if (ret)
747 goto err_me;
748
749 ret = video_register_device(vfd, VFL_TYPE_VIDEO, -1);
750 if (ret)
751 goto err_vd;
752
753 v4l2_info(v4l2_dev, "Registered %s as /dev/%s\n",
754 vfd->name, video_device_node_name(vfd));
755 return 0;
756
757 err_vd:
758 media_entity_cleanup(&vfd->entity);
759 err_me:
760 v4l2_m2m_release(fimc->m2m.m2m_dev);
761 return ret;
762 }
763
764 void fimc_unregister_m2m_device(struct fimc_dev *fimc)
765 {
766 if (!fimc)
767 return;
768
769 if (fimc->m2m.m2m_dev)
770 v4l2_m2m_release(fimc->m2m.m2m_dev);
771
772 if (video_is_registered(&fimc->m2m.vfd)) {
773 video_unregister_device(&fimc->m2m.vfd);
774 media_entity_cleanup(&fimc->m2m.vfd.entity);
775 }
776 }
Linux with added FPC-III support