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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/workqueue.h>
16#include <linux/device.h>
17#include <linux/platform_device.h>
18#include <linux/list.h>
19#include <linux/io.h>
20#include <linux/slab.h>
21#include <linux/clk.h>
22
23#include <media/v4l2-ioctl.h>
24
25#include "gsc-core.h"
26
27static int gsc_m2m_ctx_stop_req(struct gsc_ctx *ctx)
28{
29 struct gsc_ctx *curr_ctx;
30 struct gsc_dev *gsc = ctx->gsc_dev;
31 int ret;
32
33 curr_ctx = v4l2_m2m_get_curr_priv(gsc->m2m.m2m_dev);
34 if (!gsc_m2m_pending(gsc) || (curr_ctx != ctx))
35 return 0;
36
37 gsc_ctx_state_lock_set(GSC_CTX_STOP_REQ, ctx);
38 ret = wait_event_timeout(gsc->irq_queue,
39 !gsc_ctx_state_is_set(GSC_CTX_STOP_REQ, ctx),
40 GSC_SHUTDOWN_TIMEOUT);
41
42 return ret == 0 ? -ETIMEDOUT : ret;
43}
44
45static void __gsc_m2m_job_abort(struct gsc_ctx *ctx)
46{
47 int ret;
48
49 ret = gsc_m2m_ctx_stop_req(ctx);
50 if ((ret == -ETIMEDOUT) || (ctx->state & GSC_CTX_ABORT)) {
51 gsc_ctx_state_lock_clear(GSC_CTX_STOP_REQ | GSC_CTX_ABORT, ctx);
52 gsc_m2m_job_finish(ctx, VB2_BUF_STATE_ERROR);
53 }
54}
55
56static int gsc_m2m_start_streaming(struct vb2_queue *q, unsigned int count)
57{
58 struct gsc_ctx *ctx = q->drv_priv;
59 int ret;
60
61 ret = pm_runtime_get_sync(&ctx->gsc_dev->pdev->dev);
62 return ret > 0 ? 0 : ret;
63}
64
65static void __gsc_m2m_cleanup_queue(struct gsc_ctx *ctx)
66{
67 struct vb2_v4l2_buffer *src_vb, *dst_vb;
68
69 while (v4l2_m2m_num_src_bufs_ready(ctx->m2m_ctx) > 0) {
70 src_vb = v4l2_m2m_src_buf_remove(ctx->m2m_ctx);
71 v4l2_m2m_buf_done(src_vb, VB2_BUF_STATE_ERROR);
72 }
73
74 while (v4l2_m2m_num_dst_bufs_ready(ctx->m2m_ctx) > 0) {
75 dst_vb = v4l2_m2m_dst_buf_remove(ctx->m2m_ctx);
76 v4l2_m2m_buf_done(dst_vb, VB2_BUF_STATE_ERROR);
77 }
78}
79
80static void gsc_m2m_stop_streaming(struct vb2_queue *q)
81{
82 struct gsc_ctx *ctx = q->drv_priv;
83
84 __gsc_m2m_job_abort(ctx);
85
86 __gsc_m2m_cleanup_queue(ctx);
87
88 pm_runtime_put(&ctx->gsc_dev->pdev->dev);
89}
90
91void gsc_m2m_job_finish(struct gsc_ctx *ctx, int vb_state)
92{
93 struct vb2_v4l2_buffer *src_vb, *dst_vb;
94
95 if (!ctx || !ctx->m2m_ctx)
96 return;
97
98 src_vb = v4l2_m2m_src_buf_remove(ctx->m2m_ctx);
99 dst_vb = v4l2_m2m_dst_buf_remove(ctx->m2m_ctx);
100
101 if (src_vb && dst_vb) {
102 dst_vb->vb2_buf.timestamp = src_vb->vb2_buf.timestamp;
103 dst_vb->timecode = src_vb->timecode;
104 dst_vb->flags &= ~V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
105 dst_vb->flags |=
106 src_vb->flags
107 & V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
108
109 v4l2_m2m_buf_done(src_vb, vb_state);
110 v4l2_m2m_buf_done(dst_vb, vb_state);
111
112 v4l2_m2m_job_finish(ctx->gsc_dev->m2m.m2m_dev,
113 ctx->m2m_ctx);
114 }
115}
116
117static void gsc_m2m_job_abort(void *priv)
118{
119 __gsc_m2m_job_abort((struct gsc_ctx *)priv);
120}
121
122static int gsc_get_bufs(struct gsc_ctx *ctx)
123{
124 struct gsc_frame *s_frame, *d_frame;
125 struct vb2_v4l2_buffer *src_vb, *dst_vb;
126 int ret;
127
128 s_frame = &ctx->s_frame;
129 d_frame = &ctx->d_frame;
130
131 src_vb = v4l2_m2m_next_src_buf(ctx->m2m_ctx);
132 ret = gsc_prepare_addr(ctx, &src_vb->vb2_buf, s_frame, &s_frame->addr);
133 if (ret)
134 return ret;
135
136 dst_vb = v4l2_m2m_next_dst_buf(ctx->m2m_ctx);
137 ret = gsc_prepare_addr(ctx, &dst_vb->vb2_buf, d_frame, &d_frame->addr);
138 if (ret)
139 return ret;
140
141 dst_vb->vb2_buf.timestamp = src_vb->vb2_buf.timestamp;
142
143 return 0;
144}
145
146static void gsc_m2m_device_run(void *priv)
147{
148 struct gsc_ctx *ctx = priv;
149 struct gsc_dev *gsc;
150 unsigned long flags;
151 int ret;
152 bool is_set = false;
153
154 if (WARN(!ctx, "null hardware context\n"))
155 return;
156
157 gsc = ctx->gsc_dev;
158 spin_lock_irqsave(&gsc->slock, flags);
159
160 set_bit(ST_M2M_PEND, &gsc->state);
161
162
163 if (gsc->m2m.ctx != ctx) {
164 pr_debug("gsc->m2m.ctx = 0x%p, current_ctx = 0x%p",
165 gsc->m2m.ctx, ctx);
166 ctx->state |= GSC_PARAMS;
167 gsc->m2m.ctx = ctx;
168 }
169
170 is_set = ctx->state & GSC_CTX_STOP_REQ;
171 if (is_set) {
172 ctx->state &= ~GSC_CTX_STOP_REQ;
173 ctx->state |= GSC_CTX_ABORT;
174 wake_up(&gsc->irq_queue);
175 goto put_device;
176 }
177
178 ret = gsc_get_bufs(ctx);
179 if (ret) {
180 pr_err("Wrong address");
181 goto put_device;
182 }
183
184 gsc_set_prefbuf(gsc, &ctx->s_frame);
185 gsc_hw_set_input_addr(gsc, &ctx->s_frame.addr, GSC_M2M_BUF_NUM);
186 gsc_hw_set_output_addr(gsc, &ctx->d_frame.addr, GSC_M2M_BUF_NUM);
187
188 if (ctx->state & GSC_PARAMS) {
189 gsc_hw_set_input_buf_masking(gsc, GSC_M2M_BUF_NUM, false);
190 gsc_hw_set_output_buf_masking(gsc, GSC_M2M_BUF_NUM, false);
191 gsc_hw_set_frm_done_irq_mask(gsc, false);
192 gsc_hw_set_gsc_irq_enable(gsc, true);
193
194 if (gsc_set_scaler_info(ctx)) {
195 pr_err("Scaler setup error");
196 goto put_device;
197 }
198
199 gsc_hw_set_input_path(ctx);
200 gsc_hw_set_in_size(ctx);
201 gsc_hw_set_in_image_format(ctx);
202
203 gsc_hw_set_output_path(ctx);
204 gsc_hw_set_out_size(ctx);
205 gsc_hw_set_out_image_format(ctx);
206
207 gsc_hw_set_prescaler(ctx);
208 gsc_hw_set_mainscaler(ctx);
209 gsc_hw_set_rotation(ctx);
210 gsc_hw_set_global_alpha(ctx);
211 }
212
213
214 gsc_hw_set_sfr_update(ctx);
215
216 ctx->state &= ~GSC_PARAMS;
217 gsc_hw_enable_control(gsc, true);
218
219 spin_unlock_irqrestore(&gsc->slock, flags);
220 return;
221
222put_device:
223 ctx->state &= ~GSC_PARAMS;
224 spin_unlock_irqrestore(&gsc->slock, flags);
225}
226
227static int gsc_m2m_queue_setup(struct vb2_queue *vq,
228 unsigned int *num_buffers, unsigned int *num_planes,
229 unsigned int sizes[], struct device *alloc_devs[])
230{
231 struct gsc_ctx *ctx = vb2_get_drv_priv(vq);
232 struct gsc_frame *frame;
233 int i;
234
235 frame = ctx_get_frame(ctx, vq->type);
236 if (IS_ERR(frame))
237 return PTR_ERR(frame);
238
239 if (!frame->fmt)
240 return -EINVAL;
241
242 *num_planes = frame->fmt->num_planes;
243 for (i = 0; i < frame->fmt->num_planes; i++)
244 sizes[i] = frame->payload[i];
245 return 0;
246}
247
248static int gsc_m2m_buf_prepare(struct vb2_buffer *vb)
249{
250 struct gsc_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
251 struct gsc_frame *frame;
252 int i;
253
254 frame = ctx_get_frame(ctx, vb->vb2_queue->type);
255 if (IS_ERR(frame))
256 return PTR_ERR(frame);
257
258 if (!V4L2_TYPE_IS_OUTPUT(vb->vb2_queue->type)) {
259 for (i = 0; i < frame->fmt->num_planes; i++)
260 vb2_set_plane_payload(vb, i, frame->payload[i]);
261 }
262
263 return 0;
264}
265
266static void gsc_m2m_buf_queue(struct vb2_buffer *vb)
267{
268 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
269 struct gsc_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
270
271 pr_debug("ctx: %p, ctx->state: 0x%x", ctx, ctx->state);
272
273 if (ctx->m2m_ctx)
274 v4l2_m2m_buf_queue(ctx->m2m_ctx, vbuf);
275}
276
277static const struct vb2_ops gsc_m2m_qops = {
278 .queue_setup = gsc_m2m_queue_setup,
279 .buf_prepare = gsc_m2m_buf_prepare,
280 .buf_queue = gsc_m2m_buf_queue,
281 .wait_prepare = vb2_ops_wait_prepare,
282 .wait_finish = vb2_ops_wait_finish,
283 .stop_streaming = gsc_m2m_stop_streaming,
284 .start_streaming = gsc_m2m_start_streaming,
285};
286
287static int gsc_m2m_querycap(struct file *file, void *fh,
288 struct v4l2_capability *cap)
289{
290 struct gsc_ctx *ctx = fh_to_ctx(fh);
291 struct gsc_dev *gsc = ctx->gsc_dev;
292
293 strscpy(cap->driver, GSC_MODULE_NAME, sizeof(cap->driver));
294 strscpy(cap->card, GSC_MODULE_NAME " gscaler", sizeof(cap->card));
295 snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
296 dev_name(&gsc->pdev->dev));
297 return 0;
298}
299
300static int gsc_m2m_enum_fmt(struct file *file, void *priv,
301 struct v4l2_fmtdesc *f)
302{
303 return gsc_enum_fmt(f);
304}
305
306static int gsc_m2m_g_fmt_mplane(struct file *file, void *fh,
307 struct v4l2_format *f)
308{
309 struct gsc_ctx *ctx = fh_to_ctx(fh);
310
311 return gsc_g_fmt_mplane(ctx, f);
312}
313
314static int gsc_m2m_try_fmt_mplane(struct file *file, void *fh,
315 struct v4l2_format *f)
316{
317 struct gsc_ctx *ctx = fh_to_ctx(fh);
318
319 return gsc_try_fmt_mplane(ctx, f);
320}
321
322static int gsc_m2m_s_fmt_mplane(struct file *file, void *fh,
323 struct v4l2_format *f)
324{
325 struct gsc_ctx *ctx = fh_to_ctx(fh);
326 struct vb2_queue *vq;
327 struct gsc_frame *frame;
328 struct v4l2_pix_format_mplane *pix;
329 int i, ret = 0;
330
331 ret = gsc_m2m_try_fmt_mplane(file, fh, f);
332 if (ret)
333 return ret;
334
335 vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
336
337 if (vb2_is_streaming(vq)) {
338 pr_err("queue (%d) busy", f->type);
339 return -EBUSY;
340 }
341
342 if (V4L2_TYPE_IS_OUTPUT(f->type))
343 frame = &ctx->s_frame;
344 else
345 frame = &ctx->d_frame;
346
347 pix = &f->fmt.pix_mp;
348 frame->fmt = find_fmt(&pix->pixelformat, NULL, 0);
349 frame->colorspace = pix->colorspace;
350 if (!frame->fmt)
351 return -EINVAL;
352
353 for (i = 0; i < frame->fmt->num_planes; i++)
354 frame->payload[i] = pix->plane_fmt[i].sizeimage;
355
356 gsc_set_frame_size(frame, pix->width, pix->height);
357
358 if (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
359 gsc_ctx_state_lock_set(GSC_PARAMS | GSC_DST_FMT, ctx);
360 else
361 gsc_ctx_state_lock_set(GSC_PARAMS | GSC_SRC_FMT, ctx);
362
363 pr_debug("f_w: %d, f_h: %d", frame->f_width, frame->f_height);
364
365 return 0;
366}
367
368static int gsc_m2m_reqbufs(struct file *file, void *fh,
369 struct v4l2_requestbuffers *reqbufs)
370{
371 struct gsc_ctx *ctx = fh_to_ctx(fh);
372 struct gsc_dev *gsc = ctx->gsc_dev;
373 u32 max_cnt;
374
375 max_cnt = (reqbufs->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) ?
376 gsc->variant->in_buf_cnt : gsc->variant->out_buf_cnt;
377 if (reqbufs->count > max_cnt)
378 return -EINVAL;
379
380 return v4l2_m2m_reqbufs(file, ctx->m2m_ctx, reqbufs);
381}
382
383static int gsc_m2m_expbuf(struct file *file, void *fh,
384 struct v4l2_exportbuffer *eb)
385{
386 struct gsc_ctx *ctx = fh_to_ctx(fh);
387 return v4l2_m2m_expbuf(file, ctx->m2m_ctx, eb);
388}
389
390static int gsc_m2m_querybuf(struct file *file, void *fh,
391 struct v4l2_buffer *buf)
392{
393 struct gsc_ctx *ctx = fh_to_ctx(fh);
394 return v4l2_m2m_querybuf(file, ctx->m2m_ctx, buf);
395}
396
397static int gsc_m2m_qbuf(struct file *file, void *fh,
398 struct v4l2_buffer *buf)
399{
400 struct gsc_ctx *ctx = fh_to_ctx(fh);
401 return v4l2_m2m_qbuf(file, ctx->m2m_ctx, buf);
402}
403
404static int gsc_m2m_dqbuf(struct file *file, void *fh,
405 struct v4l2_buffer *buf)
406{
407 struct gsc_ctx *ctx = fh_to_ctx(fh);
408 return v4l2_m2m_dqbuf(file, ctx->m2m_ctx, buf);
409}
410
411static int gsc_m2m_streamon(struct file *file, void *fh,
412 enum v4l2_buf_type type)
413{
414 struct gsc_ctx *ctx = fh_to_ctx(fh);
415
416
417 if (V4L2_TYPE_IS_OUTPUT(type)) {
418 if (!gsc_ctx_state_is_set(GSC_SRC_FMT, ctx))
419 return -EINVAL;
420 } else if (!gsc_ctx_state_is_set(GSC_DST_FMT, ctx)) {
421 return -EINVAL;
422 }
423
424 return v4l2_m2m_streamon(file, ctx->m2m_ctx, type);
425}
426
427static int gsc_m2m_streamoff(struct file *file, void *fh,
428 enum v4l2_buf_type type)
429{
430 struct gsc_ctx *ctx = fh_to_ctx(fh);
431 return v4l2_m2m_streamoff(file, ctx->m2m_ctx, type);
432}
433
434
435static int is_rectangle_enclosed(struct v4l2_rect *a, struct v4l2_rect *b)
436{
437 if (a->left < b->left || a->top < b->top)
438 return 0;
439
440 if (a->left + a->width > b->left + b->width)
441 return 0;
442
443 if (a->top + a->height > b->top + b->height)
444 return 0;
445
446 return 1;
447}
448
449static int gsc_m2m_g_selection(struct file *file, void *fh,
450 struct v4l2_selection *s)
451{
452 struct gsc_frame *frame;
453 struct gsc_ctx *ctx = fh_to_ctx(fh);
454
455 if ((s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) &&
456 (s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT))
457 return -EINVAL;
458
459 frame = ctx_get_frame(ctx, s->type);
460 if (IS_ERR(frame))
461 return PTR_ERR(frame);
462
463 switch (s->target) {
464 case V4L2_SEL_TGT_COMPOSE_DEFAULT:
465 case V4L2_SEL_TGT_COMPOSE_BOUNDS:
466 case V4L2_SEL_TGT_CROP_BOUNDS:
467 case V4L2_SEL_TGT_CROP_DEFAULT:
468 s->r.left = 0;
469 s->r.top = 0;
470 s->r.width = frame->f_width;
471 s->r.height = frame->f_height;
472 return 0;
473
474 case V4L2_SEL_TGT_COMPOSE:
475 case V4L2_SEL_TGT_CROP:
476 s->r.left = frame->crop.left;
477 s->r.top = frame->crop.top;
478 s->r.width = frame->crop.width;
479 s->r.height = frame->crop.height;
480 return 0;
481 }
482
483 return -EINVAL;
484}
485
486static int gsc_m2m_s_selection(struct file *file, void *fh,
487 struct v4l2_selection *s)
488{
489 struct gsc_frame *frame;
490 struct gsc_ctx *ctx = fh_to_ctx(fh);
491 struct gsc_variant *variant = ctx->gsc_dev->variant;
492 struct v4l2_selection sel = *s;
493 int ret;
494
495 if ((s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) &&
496 (s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT))
497 return -EINVAL;
498
499 ret = gsc_try_selection(ctx, &sel);
500 if (ret)
501 return ret;
502
503 if (s->flags & V4L2_SEL_FLAG_LE &&
504 !is_rectangle_enclosed(&sel.r, &s->r))
505 return -ERANGE;
506
507 if (s->flags & V4L2_SEL_FLAG_GE &&
508 !is_rectangle_enclosed(&s->r, &sel.r))
509 return -ERANGE;
510
511 s->r = sel.r;
512
513 switch (s->target) {
514 case V4L2_SEL_TGT_COMPOSE_BOUNDS:
515 case V4L2_SEL_TGT_COMPOSE_DEFAULT:
516 case V4L2_SEL_TGT_COMPOSE:
517 frame = &ctx->s_frame;
518 break;
519
520 case V4L2_SEL_TGT_CROP_BOUNDS:
521 case V4L2_SEL_TGT_CROP:
522 case V4L2_SEL_TGT_CROP_DEFAULT:
523 frame = &ctx->d_frame;
524 break;
525
526 default:
527 return -EINVAL;
528 }
529
530
531 if (gsc_ctx_state_is_set(GSC_DST_FMT | GSC_SRC_FMT, ctx)) {
532 if (s->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
533 ret = gsc_check_scaler_ratio(variant, sel.r.width,
534 sel.r.height, ctx->d_frame.crop.width,
535 ctx->d_frame.crop.height,
536 ctx->gsc_ctrls.rotate->val, ctx->out_path);
537 } else {
538 ret = gsc_check_scaler_ratio(variant,
539 ctx->s_frame.crop.width,
540 ctx->s_frame.crop.height, sel.r.width,
541 sel.r.height, ctx->gsc_ctrls.rotate->val,
542 ctx->out_path);
543 }
544
545 if (ret) {
546 pr_err("Out of scaler range");
547 return -EINVAL;
548 }
549 }
550
551 frame->crop = sel.r;
552
553 gsc_ctx_state_lock_set(GSC_PARAMS, ctx);
554 return 0;
555}
556
557static const struct v4l2_ioctl_ops gsc_m2m_ioctl_ops = {
558 .vidioc_querycap = gsc_m2m_querycap,
559 .vidioc_enum_fmt_vid_cap = gsc_m2m_enum_fmt,
560 .vidioc_enum_fmt_vid_out = gsc_m2m_enum_fmt,
561 .vidioc_g_fmt_vid_cap_mplane = gsc_m2m_g_fmt_mplane,
562 .vidioc_g_fmt_vid_out_mplane = gsc_m2m_g_fmt_mplane,
563 .vidioc_try_fmt_vid_cap_mplane = gsc_m2m_try_fmt_mplane,
564 .vidioc_try_fmt_vid_out_mplane = gsc_m2m_try_fmt_mplane,
565 .vidioc_s_fmt_vid_cap_mplane = gsc_m2m_s_fmt_mplane,
566 .vidioc_s_fmt_vid_out_mplane = gsc_m2m_s_fmt_mplane,
567 .vidioc_reqbufs = gsc_m2m_reqbufs,
568 .vidioc_expbuf = gsc_m2m_expbuf,
569 .vidioc_querybuf = gsc_m2m_querybuf,
570 .vidioc_qbuf = gsc_m2m_qbuf,
571 .vidioc_dqbuf = gsc_m2m_dqbuf,
572 .vidioc_streamon = gsc_m2m_streamon,
573 .vidioc_streamoff = gsc_m2m_streamoff,
574 .vidioc_g_selection = gsc_m2m_g_selection,
575 .vidioc_s_selection = gsc_m2m_s_selection
576};
577
578static int queue_init(void *priv, struct vb2_queue *src_vq,
579 struct vb2_queue *dst_vq)
580{
581 struct gsc_ctx *ctx = priv;
582 int ret;
583
584 memset(src_vq, 0, sizeof(*src_vq));
585 src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
586 src_vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
587 src_vq->drv_priv = ctx;
588 src_vq->ops = &gsc_m2m_qops;
589 src_vq->mem_ops = &vb2_dma_contig_memops;
590 src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
591 src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
592 src_vq->lock = &ctx->gsc_dev->lock;
593 src_vq->dev = &ctx->gsc_dev->pdev->dev;
594
595 ret = vb2_queue_init(src_vq);
596 if (ret)
597 return ret;
598
599 memset(dst_vq, 0, sizeof(*dst_vq));
600 dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
601 dst_vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
602 dst_vq->drv_priv = ctx;
603 dst_vq->ops = &gsc_m2m_qops;
604 dst_vq->mem_ops = &vb2_dma_contig_memops;
605 dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
606 dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
607 dst_vq->lock = &ctx->gsc_dev->lock;
608 dst_vq->dev = &ctx->gsc_dev->pdev->dev;
609
610 return vb2_queue_init(dst_vq);
611}
612
613static int gsc_m2m_open(struct file *file)
614{
615 struct gsc_dev *gsc = video_drvdata(file);
616 struct gsc_ctx *ctx = NULL;
617 int ret;
618
619 pr_debug("pid: %d, state: 0x%lx", task_pid_nr(current), gsc->state);
620
621 if (mutex_lock_interruptible(&gsc->lock))
622 return -ERESTARTSYS;
623
624 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
625 if (!ctx) {
626 ret = -ENOMEM;
627 goto unlock;
628 }
629
630 v4l2_fh_init(&ctx->fh, gsc->m2m.vfd);
631 ret = gsc_ctrls_create(ctx);
632 if (ret)
633 goto error_fh;
634
635
636 ctx->fh.ctrl_handler = &ctx->ctrl_handler;
637 file->private_data = &ctx->fh;
638 v4l2_fh_add(&ctx->fh);
639
640 ctx->gsc_dev = gsc;
641
642 ctx->s_frame.fmt = get_format(0);
643 ctx->d_frame.fmt = get_format(0);
644
645 ctx->state = GSC_CTX_M2M;
646 ctx->flags = 0;
647 ctx->in_path = GSC_DMA;
648 ctx->out_path = GSC_DMA;
649
650 ctx->m2m_ctx = v4l2_m2m_ctx_init(gsc->m2m.m2m_dev, ctx, queue_init);
651 if (IS_ERR(ctx->m2m_ctx)) {
652 pr_err("Failed to initialize m2m context");
653 ret = PTR_ERR(ctx->m2m_ctx);
654 goto error_ctrls;
655 }
656
657 if (gsc->m2m.refcnt++ == 0)
658 set_bit(ST_M2M_OPEN, &gsc->state);
659
660 pr_debug("gsc m2m driver is opened, ctx(0x%p)", ctx);
661
662 mutex_unlock(&gsc->lock);
663 return 0;
664
665error_ctrls:
666 gsc_ctrls_delete(ctx);
667 v4l2_fh_del(&ctx->fh);
668error_fh:
669 v4l2_fh_exit(&ctx->fh);
670 kfree(ctx);
671unlock:
672 mutex_unlock(&gsc->lock);
673 return ret;
674}
675
676static int gsc_m2m_release(struct file *file)
677{
678 struct gsc_ctx *ctx = fh_to_ctx(file->private_data);
679 struct gsc_dev *gsc = ctx->gsc_dev;
680
681 pr_debug("pid: %d, state: 0x%lx, refcnt= %d",
682 task_pid_nr(current), gsc->state, gsc->m2m.refcnt);
683
684 mutex_lock(&gsc->lock);
685
686 v4l2_m2m_ctx_release(ctx->m2m_ctx);
687 gsc_ctrls_delete(ctx);
688 v4l2_fh_del(&ctx->fh);
689 v4l2_fh_exit(&ctx->fh);
690
691 if (--gsc->m2m.refcnt <= 0)
692 clear_bit(ST_M2M_OPEN, &gsc->state);
693 kfree(ctx);
694
695 mutex_unlock(&gsc->lock);
696 return 0;
697}
698
699static __poll_t gsc_m2m_poll(struct file *file,
700 struct poll_table_struct *wait)
701{
702 struct gsc_ctx *ctx = fh_to_ctx(file->private_data);
703 struct gsc_dev *gsc = ctx->gsc_dev;
704 __poll_t ret;
705
706 if (mutex_lock_interruptible(&gsc->lock))
707 return EPOLLERR;
708
709 ret = v4l2_m2m_poll(file, ctx->m2m_ctx, wait);
710 mutex_unlock(&gsc->lock);
711
712 return ret;
713}
714
715static int gsc_m2m_mmap(struct file *file, struct vm_area_struct *vma)
716{
717 struct gsc_ctx *ctx = fh_to_ctx(file->private_data);
718 struct gsc_dev *gsc = ctx->gsc_dev;
719 int ret;
720
721 if (mutex_lock_interruptible(&gsc->lock))
722 return -ERESTARTSYS;
723
724 ret = v4l2_m2m_mmap(file, ctx->m2m_ctx, vma);
725 mutex_unlock(&gsc->lock);
726
727 return ret;
728}
729
730static const struct v4l2_file_operations gsc_m2m_fops = {
731 .owner = THIS_MODULE,
732 .open = gsc_m2m_open,
733 .release = gsc_m2m_release,
734 .poll = gsc_m2m_poll,
735 .unlocked_ioctl = video_ioctl2,
736 .mmap = gsc_m2m_mmap,
737};
738
739static const struct v4l2_m2m_ops gsc_m2m_ops = {
740 .device_run = gsc_m2m_device_run,
741 .job_abort = gsc_m2m_job_abort,
742};
743
744int gsc_register_m2m_device(struct gsc_dev *gsc)
745{
746 struct platform_device *pdev;
747 int ret;
748
749 if (!gsc)
750 return -ENODEV;
751
752 pdev = gsc->pdev;
753
754 gsc->vdev.fops = &gsc_m2m_fops;
755 gsc->vdev.ioctl_ops = &gsc_m2m_ioctl_ops;
756 gsc->vdev.release = video_device_release_empty;
757 gsc->vdev.lock = &gsc->lock;
758 gsc->vdev.vfl_dir = VFL_DIR_M2M;
759 gsc->vdev.v4l2_dev = &gsc->v4l2_dev;
760 gsc->vdev.device_caps = V4L2_CAP_STREAMING |
761 V4L2_CAP_VIDEO_M2M_MPLANE;
762 snprintf(gsc->vdev.name, sizeof(gsc->vdev.name), "%s.%d:m2m",
763 GSC_MODULE_NAME, gsc->id);
764
765 video_set_drvdata(&gsc->vdev, gsc);
766
767 gsc->m2m.vfd = &gsc->vdev;
768 gsc->m2m.m2m_dev = v4l2_m2m_init(&gsc_m2m_ops);
769 if (IS_ERR(gsc->m2m.m2m_dev)) {
770 dev_err(&pdev->dev, "failed to initialize v4l2-m2m device\n");
771 return PTR_ERR(gsc->m2m.m2m_dev);
772 }
773
774 ret = video_register_device(&gsc->vdev, VFL_TYPE_GRABBER, -1);
775 if (ret) {
776 dev_err(&pdev->dev,
777 "%s(): failed to register video device\n", __func__);
778 goto err_m2m_release;
779 }
780
781 pr_debug("gsc m2m driver registered as /dev/video%d", gsc->vdev.num);
782 return 0;
783
784err_m2m_release:
785 v4l2_m2m_release(gsc->m2m.m2m_dev);
786
787 return ret;
788}
789
790void gsc_unregister_m2m_device(struct gsc_dev *gsc)
791{
792 if (gsc) {
793 v4l2_m2m_release(gsc->m2m.m2m_dev);
794 video_unregister_device(&gsc->vdev);
795 }
796}
797
