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 "common.h"
31 #include "fimc-core.h"
32 #include "fimc-reg.h"
33 #include "media-dev.h"
34
get_m2m_fmt_flags(unsigned int stream_type)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
fimc_m2m_job_finish(struct fimc_ctx * ctx,int vb_state)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->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. */
fimc_m2m_shutdown(struct fimc_ctx * ctx)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
start_streaming(struct vb2_queue * q,unsigned int count)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
stop_streaming(struct vb2_queue * q)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
fimc_device_run(void * priv)100 static void fimc_device_run(void *priv)
101 {
102 struct vb2_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, 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, df, &df->paddr);
132 if (ret)
133 goto dma_unlock;
134
135 dst_vb->v4l2_buf.timestamp = src_vb->v4l2_buf.timestamp;
136 dst_vb->v4l2_buf.flags &= ~V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
137 dst_vb->v4l2_buf.flags |=
138 src_vb->v4l2_buf.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
fimc_job_abort(void * priv)174 static void fimc_job_abort(void *priv)
175 {
176 fimc_m2m_shutdown(priv);
177 }
178
fimc_queue_setup(struct vb2_queue * vq,const struct v4l2_format * fmt,unsigned int * num_buffers,unsigned int * num_planes,unsigned int sizes[],void * allocators[])179 static int fimc_queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt,
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-contigous 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
fimc_buf_prepare(struct vb2_buffer * vb)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
fimc_buf_queue(struct vb2_buffer * vb)221 static void fimc_buf_queue(struct vb2_buffer *vb)
222 {
223 struct fimc_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
224 v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vb);
225 }
226
227 static struct vb2_ops fimc_qops = {
228 .queue_setup = fimc_queue_setup,
229 .buf_prepare = fimc_buf_prepare,
230 .buf_queue = fimc_buf_queue,
231 .wait_prepare = vb2_ops_wait_prepare,
232 .wait_finish = vb2_ops_wait_finish,
233 .stop_streaming = stop_streaming,
234 .start_streaming = start_streaming,
235 };
236
237 /*
238 * V4L2 ioctl handlers
239 */
fimc_m2m_querycap(struct file * file,void * fh,struct v4l2_capability * cap)240 static int fimc_m2m_querycap(struct file *file, void *fh,
241 struct v4l2_capability *cap)
242 {
243 struct fimc_dev *fimc = video_drvdata(file);
244 unsigned int caps;
245
246 /*
247 * This is only a mem-to-mem video device. The capture and output
248 * device capability flags are left only for backward compatibility
249 * and are scheduled for removal.
250 */
251 caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_M2M_MPLANE |
252 V4L2_CAP_VIDEO_CAPTURE_MPLANE | V4L2_CAP_VIDEO_OUTPUT_MPLANE;
253
254 __fimc_vidioc_querycap(&fimc->pdev->dev, cap, caps);
255 return 0;
256 }
257
fimc_m2m_enum_fmt_mplane(struct file * file,void * priv,struct v4l2_fmtdesc * f)258 static int fimc_m2m_enum_fmt_mplane(struct file *file, void *priv,
259 struct v4l2_fmtdesc *f)
260 {
261 struct fimc_fmt *fmt;
262
263 fmt = fimc_find_format(NULL, NULL, get_m2m_fmt_flags(f->type),
264 f->index);
265 if (!fmt)
266 return -EINVAL;
267
268 strncpy(f->description, fmt->name, sizeof(f->description) - 1);
269 f->pixelformat = fmt->fourcc;
270 return 0;
271 }
272
fimc_m2m_g_fmt_mplane(struct file * file,void * fh,struct v4l2_format * f)273 static int fimc_m2m_g_fmt_mplane(struct file *file, void *fh,
274 struct v4l2_format *f)
275 {
276 struct fimc_ctx *ctx = fh_to_ctx(fh);
277 struct fimc_frame *frame = ctx_get_frame(ctx, f->type);
278
279 if (IS_ERR(frame))
280 return PTR_ERR(frame);
281
282 __fimc_get_format(frame, f);
283 return 0;
284 }
285
fimc_try_fmt_mplane(struct fimc_ctx * ctx,struct v4l2_format * f)286 static int fimc_try_fmt_mplane(struct fimc_ctx *ctx, struct v4l2_format *f)
287 {
288 struct fimc_dev *fimc = ctx->fimc_dev;
289 const struct fimc_variant *variant = fimc->variant;
290 struct v4l2_pix_format_mplane *pix = &f->fmt.pix_mp;
291 struct fimc_fmt *fmt;
292 u32 max_w, mod_x, mod_y;
293
294 if (!IS_M2M(f->type))
295 return -EINVAL;
296
297 fmt = fimc_find_format(&pix->pixelformat, NULL,
298 get_m2m_fmt_flags(f->type), 0);
299 if (WARN(fmt == NULL, "Pixel format lookup failed"))
300 return -EINVAL;
301
302 if (pix->field == V4L2_FIELD_ANY)
303 pix->field = V4L2_FIELD_NONE;
304 else if (pix->field != V4L2_FIELD_NONE)
305 return -EINVAL;
306
307 if (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
308 max_w = variant->pix_limit->scaler_dis_w;
309 mod_x = ffs(variant->min_inp_pixsize) - 1;
310 } else {
311 max_w = variant->pix_limit->out_rot_dis_w;
312 mod_x = ffs(variant->min_out_pixsize) - 1;
313 }
314
315 if (tiled_fmt(fmt)) {
316 mod_x = 6; /* 64 x 32 pixels tile */
317 mod_y = 5;
318 } else {
319 if (variant->min_vsize_align == 1)
320 mod_y = fimc_fmt_is_rgb(fmt->color) ? 0 : 1;
321 else
322 mod_y = ffs(variant->min_vsize_align) - 1;
323 }
324
325 v4l_bound_align_image(&pix->width, 16, max_w, mod_x,
326 &pix->height, 8, variant->pix_limit->scaler_dis_w, mod_y, 0);
327
328 fimc_adjust_mplane_format(fmt, pix->width, pix->height, &f->fmt.pix_mp);
329 return 0;
330 }
331
fimc_m2m_try_fmt_mplane(struct file * file,void * fh,struct v4l2_format * f)332 static int fimc_m2m_try_fmt_mplane(struct file *file, void *fh,
333 struct v4l2_format *f)
334 {
335 struct fimc_ctx *ctx = fh_to_ctx(fh);
336 return fimc_try_fmt_mplane(ctx, f);
337 }
338
__set_frame_format(struct fimc_frame * frame,struct fimc_fmt * fmt,struct v4l2_pix_format_mplane * pixm)339 static void __set_frame_format(struct fimc_frame *frame, struct fimc_fmt *fmt,
340 struct v4l2_pix_format_mplane *pixm)
341 {
342 int i;
343
344 for (i = 0; i < fmt->memplanes; i++) {
345 frame->bytesperline[i] = pixm->plane_fmt[i].bytesperline;
346 frame->payload[i] = pixm->plane_fmt[i].sizeimage;
347 }
348
349 frame->f_width = pixm->width;
350 frame->f_height = pixm->height;
351 frame->o_width = pixm->width;
352 frame->o_height = pixm->height;
353 frame->width = pixm->width;
354 frame->height = pixm->height;
355 frame->offs_h = 0;
356 frame->offs_v = 0;
357 frame->fmt = fmt;
358 }
359
fimc_m2m_s_fmt_mplane(struct file * file,void * fh,struct v4l2_format * f)360 static int fimc_m2m_s_fmt_mplane(struct file *file, void *fh,
361 struct v4l2_format *f)
362 {
363 struct fimc_ctx *ctx = fh_to_ctx(fh);
364 struct fimc_dev *fimc = ctx->fimc_dev;
365 struct fimc_fmt *fmt;
366 struct vb2_queue *vq;
367 struct fimc_frame *frame;
368 int ret;
369
370 ret = fimc_try_fmt_mplane(ctx, f);
371 if (ret)
372 return ret;
373
374 vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
375
376 if (vb2_is_busy(vq)) {
377 v4l2_err(&fimc->m2m.vfd, "queue (%d) busy\n", f->type);
378 return -EBUSY;
379 }
380
381 if (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
382 frame = &ctx->s_frame;
383 else
384 frame = &ctx->d_frame;
385
386 fmt = fimc_find_format(&f->fmt.pix_mp.pixelformat, NULL,
387 get_m2m_fmt_flags(f->type), 0);
388 if (!fmt)
389 return -EINVAL;
390
391 __set_frame_format(frame, fmt, &f->fmt.pix_mp);
392
393 /* Update RGB Alpha control state and value range */
394 fimc_alpha_ctrl_update(ctx);
395
396 return 0;
397 }
398
fimc_m2m_cropcap(struct file * file,void * fh,struct v4l2_cropcap * cr)399 static int fimc_m2m_cropcap(struct file *file, void *fh,
400 struct v4l2_cropcap *cr)
401 {
402 struct fimc_ctx *ctx = fh_to_ctx(fh);
403 struct fimc_frame *frame;
404
405 frame = ctx_get_frame(ctx, cr->type);
406 if (IS_ERR(frame))
407 return PTR_ERR(frame);
408
409 cr->bounds.left = 0;
410 cr->bounds.top = 0;
411 cr->bounds.width = frame->o_width;
412 cr->bounds.height = frame->o_height;
413 cr->defrect = cr->bounds;
414
415 return 0;
416 }
417
fimc_m2m_g_crop(struct file * file,void * fh,struct v4l2_crop * cr)418 static int fimc_m2m_g_crop(struct file *file, void *fh, struct v4l2_crop *cr)
419 {
420 struct fimc_ctx *ctx = fh_to_ctx(fh);
421 struct fimc_frame *frame;
422
423 frame = ctx_get_frame(ctx, cr->type);
424 if (IS_ERR(frame))
425 return PTR_ERR(frame);
426
427 cr->c.left = frame->offs_h;
428 cr->c.top = frame->offs_v;
429 cr->c.width = frame->width;
430 cr->c.height = frame->height;
431
432 return 0;
433 }
434
fimc_m2m_try_crop(struct fimc_ctx * ctx,struct v4l2_crop * cr)435 static int fimc_m2m_try_crop(struct fimc_ctx *ctx, struct v4l2_crop *cr)
436 {
437 struct fimc_dev *fimc = ctx->fimc_dev;
438 struct fimc_frame *f;
439 u32 min_size, halign, depth = 0;
440 int i;
441
442 if (cr->c.top < 0 || cr->c.left < 0) {
443 v4l2_err(&fimc->m2m.vfd,
444 "doesn't support negative values for top & left\n");
445 return -EINVAL;
446 }
447 if (cr->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
448 f = &ctx->d_frame;
449 else if (cr->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
450 f = &ctx->s_frame;
451 else
452 return -EINVAL;
453
454 min_size = (f == &ctx->s_frame) ?
455 fimc->variant->min_inp_pixsize : fimc->variant->min_out_pixsize;
456
457 /* Get pixel alignment constraints. */
458 if (fimc->variant->min_vsize_align == 1)
459 halign = fimc_fmt_is_rgb(f->fmt->color) ? 0 : 1;
460 else
461 halign = ffs(fimc->variant->min_vsize_align) - 1;
462
463 for (i = 0; i < f->fmt->memplanes; i++)
464 depth += f->fmt->depth[i];
465
466 v4l_bound_align_image(&cr->c.width, min_size, f->o_width,
467 ffs(min_size) - 1,
468 &cr->c.height, min_size, f->o_height,
469 halign, 64/(ALIGN(depth, 8)));
470
471 /* adjust left/top if cropping rectangle is out of bounds */
472 if (cr->c.left + cr->c.width > f->o_width)
473 cr->c.left = f->o_width - cr->c.width;
474 if (cr->c.top + cr->c.height > f->o_height)
475 cr->c.top = f->o_height - cr->c.height;
476
477 cr->c.left = round_down(cr->c.left, min_size);
478 cr->c.top = round_down(cr->c.top, fimc->variant->hor_offs_align);
479
480 dbg("l:%d, t:%d, w:%d, h:%d, f_w: %d, f_h: %d",
481 cr->c.left, cr->c.top, cr->c.width, cr->c.height,
482 f->f_width, f->f_height);
483
484 return 0;
485 }
486
fimc_m2m_s_crop(struct file * file,void * fh,const struct v4l2_crop * crop)487 static int fimc_m2m_s_crop(struct file *file, void *fh, const struct v4l2_crop *crop)
488 {
489 struct fimc_ctx *ctx = fh_to_ctx(fh);
490 struct fimc_dev *fimc = ctx->fimc_dev;
491 struct v4l2_crop cr = *crop;
492 struct fimc_frame *f;
493 int ret;
494
495 ret = fimc_m2m_try_crop(ctx, &cr);
496 if (ret)
497 return ret;
498
499 f = (cr.type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) ?
500 &ctx->s_frame : &ctx->d_frame;
501
502 /* Check to see if scaling ratio is within supported range */
503 if (cr.type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
504 ret = fimc_check_scaler_ratio(ctx, cr.c.width,
505 cr.c.height, ctx->d_frame.width,
506 ctx->d_frame.height, ctx->rotation);
507 } else {
508 ret = fimc_check_scaler_ratio(ctx, ctx->s_frame.width,
509 ctx->s_frame.height, cr.c.width,
510 cr.c.height, ctx->rotation);
511 }
512 if (ret) {
513 v4l2_err(&fimc->m2m.vfd, "Out of scaler range\n");
514 return -EINVAL;
515 }
516
517 f->offs_h = cr.c.left;
518 f->offs_v = cr.c.top;
519 f->width = cr.c.width;
520 f->height = cr.c.height;
521
522 fimc_ctx_state_set(FIMC_PARAMS, ctx);
523
524 return 0;
525 }
526
527 static const struct v4l2_ioctl_ops fimc_m2m_ioctl_ops = {
528 .vidioc_querycap = fimc_m2m_querycap,
529 .vidioc_enum_fmt_vid_cap_mplane = fimc_m2m_enum_fmt_mplane,
530 .vidioc_enum_fmt_vid_out_mplane = fimc_m2m_enum_fmt_mplane,
531 .vidioc_g_fmt_vid_cap_mplane = fimc_m2m_g_fmt_mplane,
532 .vidioc_g_fmt_vid_out_mplane = fimc_m2m_g_fmt_mplane,
533 .vidioc_try_fmt_vid_cap_mplane = fimc_m2m_try_fmt_mplane,
534 .vidioc_try_fmt_vid_out_mplane = fimc_m2m_try_fmt_mplane,
535 .vidioc_s_fmt_vid_cap_mplane = fimc_m2m_s_fmt_mplane,
536 .vidioc_s_fmt_vid_out_mplane = fimc_m2m_s_fmt_mplane,
537 .vidioc_reqbufs = v4l2_m2m_ioctl_reqbufs,
538 .vidioc_querybuf = v4l2_m2m_ioctl_querybuf,
539 .vidioc_qbuf = v4l2_m2m_ioctl_qbuf,
540 .vidioc_dqbuf = v4l2_m2m_ioctl_dqbuf,
541 .vidioc_expbuf = v4l2_m2m_ioctl_expbuf,
542 .vidioc_streamon = v4l2_m2m_ioctl_streamon,
543 .vidioc_streamoff = v4l2_m2m_ioctl_streamoff,
544 .vidioc_g_crop = fimc_m2m_g_crop,
545 .vidioc_s_crop = fimc_m2m_s_crop,
546 .vidioc_cropcap = fimc_m2m_cropcap
547
548 };
549
queue_init(void * priv,struct vb2_queue * src_vq,struct vb2_queue * dst_vq)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
565 ret = vb2_queue_init(src_vq);
566 if (ret)
567 return ret;
568
569 dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
570 dst_vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
571 dst_vq->drv_priv = ctx;
572 dst_vq->ops = &fimc_qops;
573 dst_vq->mem_ops = &vb2_dma_contig_memops;
574 dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
575 dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
576 dst_vq->lock = &ctx->fimc_dev->lock;
577
578 return vb2_queue_init(dst_vq);
579 }
580
fimc_m2m_set_default_format(struct fimc_ctx * ctx)581 static int fimc_m2m_set_default_format(struct fimc_ctx *ctx)
582 {
583 struct v4l2_pix_format_mplane pixm = {
584 .pixelformat = V4L2_PIX_FMT_RGB32,
585 .width = 800,
586 .height = 600,
587 .plane_fmt[0] = {
588 .bytesperline = 800 * 4,
589 .sizeimage = 800 * 4 * 600,
590 },
591 };
592 struct fimc_fmt *fmt;
593
594 fmt = fimc_find_format(&pixm.pixelformat, NULL, FMT_FLAGS_M2M, 0);
595 if (!fmt)
596 return -EINVAL;
597
598 __set_frame_format(&ctx->s_frame, fmt, &pixm);
599 __set_frame_format(&ctx->d_frame, fmt, &pixm);
600
601 return 0;
602 }
603
fimc_m2m_open(struct file * file)604 static int fimc_m2m_open(struct file *file)
605 {
606 struct fimc_dev *fimc = video_drvdata(file);
607 struct fimc_ctx *ctx;
608 int ret = -EBUSY;
609
610 pr_debug("pid: %d, state: %#lx\n", task_pid_nr(current), fimc->state);
611
612 if (mutex_lock_interruptible(&fimc->lock))
613 return -ERESTARTSYS;
614 /*
615 * Don't allow simultaneous open() of the mem-to-mem and the
616 * capture video node that belong to same FIMC IP instance.
617 */
618 if (test_bit(ST_CAPT_BUSY, &fimc->state))
619 goto unlock;
620
621 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
622 if (!ctx) {
623 ret = -ENOMEM;
624 goto unlock;
625 }
626 v4l2_fh_init(&ctx->fh, &fimc->m2m.vfd);
627 ctx->fimc_dev = fimc;
628
629 /* Default color format */
630 ctx->s_frame.fmt = fimc_get_format(0);
631 ctx->d_frame.fmt = fimc_get_format(0);
632
633 ret = fimc_ctrls_create(ctx);
634 if (ret)
635 goto error_fh;
636
637 /* Use separate control handler per file handle */
638 ctx->fh.ctrl_handler = &ctx->ctrls.handler;
639 file->private_data = &ctx->fh;
640 v4l2_fh_add(&ctx->fh);
641
642 /* Setup the device context for memory-to-memory mode */
643 ctx->state = FIMC_CTX_M2M;
644 ctx->flags = 0;
645 ctx->in_path = FIMC_IO_DMA;
646 ctx->out_path = FIMC_IO_DMA;
647 ctx->scaler.enabled = 1;
648
649 ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(fimc->m2m.m2m_dev, ctx, queue_init);
650 if (IS_ERR(ctx->fh.m2m_ctx)) {
651 ret = PTR_ERR(ctx->fh.m2m_ctx);
652 goto error_c;
653 }
654
655 if (fimc->m2m.refcnt++ == 0)
656 set_bit(ST_M2M_RUN, &fimc->state);
657
658 ret = fimc_m2m_set_default_format(ctx);
659 if (ret < 0)
660 goto error_m2m_ctx;
661
662 mutex_unlock(&fimc->lock);
663 return 0;
664
665 error_m2m_ctx:
666 v4l2_m2m_ctx_release(ctx->fh.m2m_ctx);
667 error_c:
668 fimc_ctrls_delete(ctx);
669 error_fh:
670 v4l2_fh_del(&ctx->fh);
671 v4l2_fh_exit(&ctx->fh);
672 kfree(ctx);
673 unlock:
674 mutex_unlock(&fimc->lock);
675 return ret;
676 }
677
fimc_m2m_release(struct file * file)678 static int fimc_m2m_release(struct file *file)
679 {
680 struct fimc_ctx *ctx = fh_to_ctx(file->private_data);
681 struct fimc_dev *fimc = ctx->fimc_dev;
682
683 dbg("pid: %d, state: 0x%lx, refcnt= %d",
684 task_pid_nr(current), fimc->state, fimc->m2m.refcnt);
685
686 mutex_lock(&fimc->lock);
687
688 v4l2_m2m_ctx_release(ctx->fh.m2m_ctx);
689 fimc_ctrls_delete(ctx);
690 v4l2_fh_del(&ctx->fh);
691 v4l2_fh_exit(&ctx->fh);
692
693 if (--fimc->m2m.refcnt <= 0)
694 clear_bit(ST_M2M_RUN, &fimc->state);
695 kfree(ctx);
696
697 mutex_unlock(&fimc->lock);
698 return 0;
699 }
700
701 static const struct v4l2_file_operations fimc_m2m_fops = {
702 .owner = THIS_MODULE,
703 .open = fimc_m2m_open,
704 .release = fimc_m2m_release,
705 .poll = v4l2_m2m_fop_poll,
706 .unlocked_ioctl = video_ioctl2,
707 .mmap = v4l2_m2m_fop_mmap,
708 };
709
710 static struct v4l2_m2m_ops m2m_ops = {
711 .device_run = fimc_device_run,
712 .job_abort = fimc_job_abort,
713 };
714
fimc_register_m2m_device(struct fimc_dev * fimc,struct v4l2_device * v4l2_dev)715 int fimc_register_m2m_device(struct fimc_dev *fimc,
716 struct v4l2_device *v4l2_dev)
717 {
718 struct video_device *vfd = &fimc->m2m.vfd;
719 int ret;
720
721 fimc->v4l2_dev = v4l2_dev;
722
723 memset(vfd, 0, sizeof(*vfd));
724 vfd->fops = &fimc_m2m_fops;
725 vfd->ioctl_ops = &fimc_m2m_ioctl_ops;
726 vfd->v4l2_dev = v4l2_dev;
727 vfd->minor = -1;
728 vfd->release = video_device_release_empty;
729 vfd->lock = &fimc->lock;
730 vfd->vfl_dir = VFL_DIR_M2M;
731
732 snprintf(vfd->name, sizeof(vfd->name), "fimc.%d.m2m", fimc->id);
733 video_set_drvdata(vfd, fimc);
734
735 fimc->m2m.m2m_dev = v4l2_m2m_init(&m2m_ops);
736 if (IS_ERR(fimc->m2m.m2m_dev)) {
737 v4l2_err(v4l2_dev, "failed to initialize v4l2-m2m device\n");
738 return PTR_ERR(fimc->m2m.m2m_dev);
739 }
740
741 ret = media_entity_init(&vfd->entity, 0, NULL, 0);
742 if (ret)
743 goto err_me;
744
745 ret = video_register_device(vfd, VFL_TYPE_GRABBER, -1);
746 if (ret)
747 goto err_vd;
748
749 v4l2_info(v4l2_dev, "Registered %s as /dev/%s\n",
750 vfd->name, video_device_node_name(vfd));
751 return 0;
752
753 err_vd:
754 media_entity_cleanup(&vfd->entity);
755 err_me:
756 v4l2_m2m_release(fimc->m2m.m2m_dev);
757 return ret;
758 }
759
fimc_unregister_m2m_device(struct fimc_dev * fimc)760 void fimc_unregister_m2m_device(struct fimc_dev *fimc)
761 {
762 if (!fimc)
763 return;
764
765 if (fimc->m2m.m2m_dev)
766 v4l2_m2m_release(fimc->m2m.m2m_dev);
767
768 if (video_is_registered(&fimc->m2m.vfd)) {
769 video_unregister_device(&fimc->m2m.vfd);
770 media_entity_cleanup(&fimc->m2m.vfd.entity);
771 }
772 }
773