2 * Copyright (c) 2011 - 2012 Samsung Electronics Co., Ltd.
3 * http://www.samsung.com
5 * Samsung EXYNOS5 SoC series G-Scaler driver
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.
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/workqueue.h>
20 #include <linux/device.h>
21 #include <linux/platform_device.h>
22 #include <linux/list.h>
24 #include <linux/slab.h>
25 #include <linux/clk.h>
27 #include <media/v4l2-ioctl.h>
31 static int gsc_m2m_ctx_stop_req(struct gsc_ctx *ctx)
33 struct gsc_ctx *curr_ctx;
34 struct gsc_dev *gsc = ctx->gsc_dev;
37 curr_ctx = v4l2_m2m_get_curr_priv(gsc->m2m.m2m_dev);
38 if (!gsc_m2m_pending(gsc) || (curr_ctx != ctx))
41 gsc_ctx_state_lock_set(GSC_CTX_STOP_REQ, ctx);
42 ret = wait_event_timeout(gsc->irq_queue,
43 !gsc_ctx_state_is_set(GSC_CTX_STOP_REQ, ctx),
44 GSC_SHUTDOWN_TIMEOUT);
46 return ret == 0 ? -ETIMEDOUT : ret;
49 static void __gsc_m2m_job_abort(struct gsc_ctx *ctx)
53 ret = gsc_m2m_ctx_stop_req(ctx);
54 if ((ret == -ETIMEDOUT) || (ctx->state & GSC_CTX_ABORT)) {
55 gsc_ctx_state_lock_clear(GSC_CTX_STOP_REQ | GSC_CTX_ABORT, ctx);
56 gsc_m2m_job_finish(ctx, VB2_BUF_STATE_ERROR);
60 static int gsc_m2m_start_streaming(struct vb2_queue *q, unsigned int count)
62 struct gsc_ctx *ctx = q->drv_priv;
65 ret = pm_runtime_get_sync(&ctx->gsc_dev->pdev->dev);
66 return ret > 0 ? 0 : ret;
69 static void gsc_m2m_stop_streaming(struct vb2_queue *q)
71 struct gsc_ctx *ctx = q->drv_priv;
73 __gsc_m2m_job_abort(ctx);
75 pm_runtime_put(&ctx->gsc_dev->pdev->dev);
78 void gsc_m2m_job_finish(struct gsc_ctx *ctx, int vb_state)
80 struct vb2_buffer *src_vb, *dst_vb;
82 if (!ctx || !ctx->m2m_ctx)
85 src_vb = v4l2_m2m_src_buf_remove(ctx->m2m_ctx);
86 dst_vb = v4l2_m2m_dst_buf_remove(ctx->m2m_ctx);
88 if (src_vb && dst_vb) {
89 dst_vb->v4l2_buf.timestamp = src_vb->v4l2_buf.timestamp;
90 dst_vb->v4l2_buf.timecode = src_vb->v4l2_buf.timecode;
91 dst_vb->v4l2_buf.flags &= ~V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
92 dst_vb->v4l2_buf.flags |=
93 src_vb->v4l2_buf.flags
94 & V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
96 v4l2_m2m_buf_done(src_vb, vb_state);
97 v4l2_m2m_buf_done(dst_vb, vb_state);
99 v4l2_m2m_job_finish(ctx->gsc_dev->m2m.m2m_dev,
104 static void gsc_m2m_job_abort(void *priv)
106 __gsc_m2m_job_abort((struct gsc_ctx *)priv);
109 static int gsc_get_bufs(struct gsc_ctx *ctx)
111 struct gsc_frame *s_frame, *d_frame;
112 struct vb2_buffer *src_vb, *dst_vb;
115 s_frame = &ctx->s_frame;
116 d_frame = &ctx->d_frame;
118 src_vb = v4l2_m2m_next_src_buf(ctx->m2m_ctx);
119 ret = gsc_prepare_addr(ctx, src_vb, s_frame, &s_frame->addr);
123 dst_vb = v4l2_m2m_next_dst_buf(ctx->m2m_ctx);
124 ret = gsc_prepare_addr(ctx, dst_vb, d_frame, &d_frame->addr);
128 dst_vb->v4l2_buf.timestamp = src_vb->v4l2_buf.timestamp;
133 static void gsc_m2m_device_run(void *priv)
135 struct gsc_ctx *ctx = priv;
141 if (WARN(!ctx, "null hardware context\n"))
145 spin_lock_irqsave(&gsc->slock, flags);
147 set_bit(ST_M2M_PEND, &gsc->state);
149 /* Reconfigure hardware if the context has changed. */
150 if (gsc->m2m.ctx != ctx) {
151 pr_debug("gsc->m2m.ctx = 0x%p, current_ctx = 0x%p",
153 ctx->state |= GSC_PARAMS;
157 is_set = ctx->state & GSC_CTX_STOP_REQ;
159 ctx->state &= ~GSC_CTX_STOP_REQ;
160 ctx->state |= GSC_CTX_ABORT;
161 wake_up(&gsc->irq_queue);
165 ret = gsc_get_bufs(ctx);
167 pr_err("Wrong address");
171 gsc_set_prefbuf(gsc, &ctx->s_frame);
172 gsc_hw_set_input_addr(gsc, &ctx->s_frame.addr, GSC_M2M_BUF_NUM);
173 gsc_hw_set_output_addr(gsc, &ctx->d_frame.addr, GSC_M2M_BUF_NUM);
175 if (ctx->state & GSC_PARAMS) {
176 gsc_hw_set_input_buf_masking(gsc, GSC_M2M_BUF_NUM, false);
177 gsc_hw_set_output_buf_masking(gsc, GSC_M2M_BUF_NUM, false);
178 gsc_hw_set_frm_done_irq_mask(gsc, false);
179 gsc_hw_set_gsc_irq_enable(gsc, true);
181 if (gsc_set_scaler_info(ctx)) {
182 pr_err("Scaler setup error");
186 gsc_hw_set_input_path(ctx);
187 gsc_hw_set_in_size(ctx);
188 gsc_hw_set_in_image_format(ctx);
190 gsc_hw_set_output_path(ctx);
191 gsc_hw_set_out_size(ctx);
192 gsc_hw_set_out_image_format(ctx);
194 gsc_hw_set_prescaler(ctx);
195 gsc_hw_set_mainscaler(ctx);
196 gsc_hw_set_rotation(ctx);
197 gsc_hw_set_global_alpha(ctx);
200 /* update shadow registers */
201 gsc_hw_set_sfr_update(ctx);
203 ctx->state &= ~GSC_PARAMS;
204 gsc_hw_enable_control(gsc, true);
206 spin_unlock_irqrestore(&gsc->slock, flags);
210 ctx->state &= ~GSC_PARAMS;
211 spin_unlock_irqrestore(&gsc->slock, flags);
214 static int gsc_m2m_queue_setup(struct vb2_queue *vq,
215 const struct v4l2_format *fmt,
216 unsigned int *num_buffers, unsigned int *num_planes,
217 unsigned int sizes[], void *allocators[])
219 struct gsc_ctx *ctx = vb2_get_drv_priv(vq);
220 struct gsc_frame *frame;
223 frame = ctx_get_frame(ctx, vq->type);
225 return PTR_ERR(frame);
230 *num_planes = frame->fmt->num_planes;
231 for (i = 0; i < frame->fmt->num_planes; i++) {
232 sizes[i] = frame->payload[i];
233 allocators[i] = ctx->gsc_dev->alloc_ctx;
238 static int gsc_m2m_buf_prepare(struct vb2_buffer *vb)
240 struct gsc_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
241 struct gsc_frame *frame;
244 frame = ctx_get_frame(ctx, vb->vb2_queue->type);
246 return PTR_ERR(frame);
248 if (!V4L2_TYPE_IS_OUTPUT(vb->vb2_queue->type)) {
249 for (i = 0; i < frame->fmt->num_planes; i++)
250 vb2_set_plane_payload(vb, i, frame->payload[i]);
256 static void gsc_m2m_buf_queue(struct vb2_buffer *vb)
258 struct gsc_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
260 pr_debug("ctx: %p, ctx->state: 0x%x", ctx, ctx->state);
263 v4l2_m2m_buf_queue(ctx->m2m_ctx, vb);
266 static struct vb2_ops gsc_m2m_qops = {
267 .queue_setup = gsc_m2m_queue_setup,
268 .buf_prepare = gsc_m2m_buf_prepare,
269 .buf_queue = gsc_m2m_buf_queue,
270 .wait_prepare = gsc_unlock,
271 .wait_finish = gsc_lock,
272 .stop_streaming = gsc_m2m_stop_streaming,
273 .start_streaming = gsc_m2m_start_streaming,
276 static int gsc_m2m_querycap(struct file *file, void *fh,
277 struct v4l2_capability *cap)
279 struct gsc_ctx *ctx = fh_to_ctx(fh);
280 struct gsc_dev *gsc = ctx->gsc_dev;
282 strlcpy(cap->driver, gsc->pdev->name, sizeof(cap->driver));
283 strlcpy(cap->card, gsc->pdev->name, sizeof(cap->card));
284 strlcpy(cap->bus_info, "platform", sizeof(cap->bus_info));
285 cap->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_M2M_MPLANE |
286 V4L2_CAP_VIDEO_CAPTURE_MPLANE | V4L2_CAP_VIDEO_OUTPUT_MPLANE;
288 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
292 static int gsc_m2m_enum_fmt_mplane(struct file *file, void *priv,
293 struct v4l2_fmtdesc *f)
295 return gsc_enum_fmt_mplane(f);
298 static int gsc_m2m_g_fmt_mplane(struct file *file, void *fh,
299 struct v4l2_format *f)
301 struct gsc_ctx *ctx = fh_to_ctx(fh);
303 return gsc_g_fmt_mplane(ctx, f);
306 static int gsc_m2m_try_fmt_mplane(struct file *file, void *fh,
307 struct v4l2_format *f)
309 struct gsc_ctx *ctx = fh_to_ctx(fh);
311 return gsc_try_fmt_mplane(ctx, f);
314 static int gsc_m2m_s_fmt_mplane(struct file *file, void *fh,
315 struct v4l2_format *f)
317 struct gsc_ctx *ctx = fh_to_ctx(fh);
318 struct vb2_queue *vq;
319 struct gsc_frame *frame;
320 struct v4l2_pix_format_mplane *pix;
323 ret = gsc_m2m_try_fmt_mplane(file, fh, f);
327 vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
329 if (vb2_is_streaming(vq)) {
330 pr_err("queue (%d) busy", f->type);
334 if (V4L2_TYPE_IS_OUTPUT(f->type))
335 frame = &ctx->s_frame;
337 frame = &ctx->d_frame;
339 pix = &f->fmt.pix_mp;
340 frame->fmt = find_fmt(&pix->pixelformat, NULL, 0);
341 frame->colorspace = pix->colorspace;
345 for (i = 0; i < frame->fmt->num_planes; i++)
346 frame->payload[i] = pix->plane_fmt[i].sizeimage;
348 gsc_set_frame_size(frame, pix->width, pix->height);
350 if (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
351 gsc_ctx_state_lock_set(GSC_PARAMS | GSC_DST_FMT, ctx);
353 gsc_ctx_state_lock_set(GSC_PARAMS | GSC_SRC_FMT, ctx);
355 pr_debug("f_w: %d, f_h: %d", frame->f_width, frame->f_height);
360 static int gsc_m2m_reqbufs(struct file *file, void *fh,
361 struct v4l2_requestbuffers *reqbufs)
363 struct gsc_ctx *ctx = fh_to_ctx(fh);
364 struct gsc_dev *gsc = ctx->gsc_dev;
365 struct gsc_frame *frame;
368 max_cnt = (reqbufs->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) ?
369 gsc->variant->in_buf_cnt : gsc->variant->out_buf_cnt;
370 if (reqbufs->count > max_cnt) {
372 } else if (reqbufs->count == 0) {
373 if (reqbufs->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
374 gsc_ctx_state_lock_clear(GSC_SRC_FMT, ctx);
376 gsc_ctx_state_lock_clear(GSC_DST_FMT, ctx);
379 frame = ctx_get_frame(ctx, reqbufs->type);
381 return v4l2_m2m_reqbufs(file, ctx->m2m_ctx, reqbufs);
384 static int gsc_m2m_expbuf(struct file *file, void *fh,
385 struct v4l2_exportbuffer *eb)
387 struct gsc_ctx *ctx = fh_to_ctx(fh);
388 return v4l2_m2m_expbuf(file, ctx->m2m_ctx, eb);
391 static int gsc_m2m_querybuf(struct file *file, void *fh,
392 struct v4l2_buffer *buf)
394 struct gsc_ctx *ctx = fh_to_ctx(fh);
395 return v4l2_m2m_querybuf(file, ctx->m2m_ctx, buf);
398 static int gsc_m2m_qbuf(struct file *file, void *fh,
399 struct v4l2_buffer *buf)
401 struct gsc_ctx *ctx = fh_to_ctx(fh);
402 return v4l2_m2m_qbuf(file, ctx->m2m_ctx, buf);
405 static int gsc_m2m_dqbuf(struct file *file, void *fh,
406 struct v4l2_buffer *buf)
408 struct gsc_ctx *ctx = fh_to_ctx(fh);
409 return v4l2_m2m_dqbuf(file, ctx->m2m_ctx, buf);
412 static int gsc_m2m_streamon(struct file *file, void *fh,
413 enum v4l2_buf_type type)
415 struct gsc_ctx *ctx = fh_to_ctx(fh);
417 /* The source and target color format need to be set */
418 if (V4L2_TYPE_IS_OUTPUT(type)) {
419 if (!gsc_ctx_state_is_set(GSC_SRC_FMT, ctx))
421 } else if (!gsc_ctx_state_is_set(GSC_DST_FMT, ctx)) {
425 return v4l2_m2m_streamon(file, ctx->m2m_ctx, type);
428 static int gsc_m2m_streamoff(struct file *file, void *fh,
429 enum v4l2_buf_type type)
431 struct gsc_ctx *ctx = fh_to_ctx(fh);
432 return v4l2_m2m_streamoff(file, ctx->m2m_ctx, type);
435 /* Return 1 if rectangle a is enclosed in rectangle b, or 0 otherwise. */
436 static int is_rectangle_enclosed(struct v4l2_rect *a, struct v4l2_rect *b)
438 if (a->left < b->left || a->top < b->top)
441 if (a->left + a->width > b->left + b->width)
444 if (a->top + a->height > b->top + b->height)
450 static int gsc_m2m_g_selection(struct file *file, void *fh,
451 struct v4l2_selection *s)
453 struct gsc_frame *frame;
454 struct gsc_ctx *ctx = fh_to_ctx(fh);
456 if ((s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) &&
457 (s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE))
460 frame = ctx_get_frame(ctx, s->type);
462 return PTR_ERR(frame);
465 case V4L2_SEL_TGT_COMPOSE_DEFAULT:
466 case V4L2_SEL_TGT_COMPOSE_BOUNDS:
467 case V4L2_SEL_TGT_CROP_BOUNDS:
468 case V4L2_SEL_TGT_CROP_DEFAULT:
471 s->r.width = frame->f_width;
472 s->r.height = frame->f_height;
475 case V4L2_SEL_TGT_COMPOSE:
476 case V4L2_SEL_TGT_CROP:
477 s->r.left = frame->crop.left;
478 s->r.top = frame->crop.top;
479 s->r.width = frame->crop.width;
480 s->r.height = frame->crop.height;
487 static int gsc_m2m_s_selection(struct file *file, void *fh,
488 struct v4l2_selection *s)
490 struct gsc_frame *frame;
491 struct gsc_ctx *ctx = fh_to_ctx(fh);
493 struct gsc_variant *variant = ctx->gsc_dev->variant;
499 if ((s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) &&
500 (s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE))
503 ret = gsc_try_crop(ctx, &cr);
507 if (s->flags & V4L2_SEL_FLAG_LE &&
508 !is_rectangle_enclosed(&cr.c, &s->r))
511 if (s->flags & V4L2_SEL_FLAG_GE &&
512 !is_rectangle_enclosed(&s->r, &cr.c))
518 case V4L2_SEL_TGT_COMPOSE_BOUNDS:
519 case V4L2_SEL_TGT_COMPOSE_DEFAULT:
520 case V4L2_SEL_TGT_COMPOSE:
521 frame = &ctx->s_frame;
524 case V4L2_SEL_TGT_CROP_BOUNDS:
525 case V4L2_SEL_TGT_CROP:
526 case V4L2_SEL_TGT_CROP_DEFAULT:
527 frame = &ctx->d_frame;
534 /* Check to see if scaling ratio is within supported range */
535 if (gsc_ctx_state_is_set(GSC_DST_FMT | GSC_SRC_FMT, ctx)) {
536 if (s->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
537 ret = gsc_check_scaler_ratio(variant, cr.c.width,
538 cr.c.height, ctx->d_frame.crop.width,
539 ctx->d_frame.crop.height,
540 ctx->gsc_ctrls.rotate->val, ctx->out_path);
542 ret = gsc_check_scaler_ratio(variant,
543 ctx->s_frame.crop.width,
544 ctx->s_frame.crop.height, cr.c.width,
545 cr.c.height, ctx->gsc_ctrls.rotate->val,
550 pr_err("Out of scaler range");
557 gsc_ctx_state_lock_set(GSC_PARAMS, ctx);
561 static const struct v4l2_ioctl_ops gsc_m2m_ioctl_ops = {
562 .vidioc_querycap = gsc_m2m_querycap,
563 .vidioc_enum_fmt_vid_cap_mplane = gsc_m2m_enum_fmt_mplane,
564 .vidioc_enum_fmt_vid_out_mplane = gsc_m2m_enum_fmt_mplane,
565 .vidioc_g_fmt_vid_cap_mplane = gsc_m2m_g_fmt_mplane,
566 .vidioc_g_fmt_vid_out_mplane = gsc_m2m_g_fmt_mplane,
567 .vidioc_try_fmt_vid_cap_mplane = gsc_m2m_try_fmt_mplane,
568 .vidioc_try_fmt_vid_out_mplane = gsc_m2m_try_fmt_mplane,
569 .vidioc_s_fmt_vid_cap_mplane = gsc_m2m_s_fmt_mplane,
570 .vidioc_s_fmt_vid_out_mplane = gsc_m2m_s_fmt_mplane,
571 .vidioc_reqbufs = gsc_m2m_reqbufs,
572 .vidioc_expbuf = gsc_m2m_expbuf,
573 .vidioc_querybuf = gsc_m2m_querybuf,
574 .vidioc_qbuf = gsc_m2m_qbuf,
575 .vidioc_dqbuf = gsc_m2m_dqbuf,
576 .vidioc_streamon = gsc_m2m_streamon,
577 .vidioc_streamoff = gsc_m2m_streamoff,
578 .vidioc_g_selection = gsc_m2m_g_selection,
579 .vidioc_s_selection = gsc_m2m_s_selection
582 static int queue_init(void *priv, struct vb2_queue *src_vq,
583 struct vb2_queue *dst_vq)
585 struct gsc_ctx *ctx = priv;
588 memset(src_vq, 0, sizeof(*src_vq));
589 src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
590 src_vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
591 src_vq->drv_priv = ctx;
592 src_vq->ops = &gsc_m2m_qops;
593 src_vq->mem_ops = &vb2_dma_contig_memops;
594 src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
595 src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
597 ret = vb2_queue_init(src_vq);
601 memset(dst_vq, 0, sizeof(*dst_vq));
602 dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
603 dst_vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
604 dst_vq->drv_priv = ctx;
605 dst_vq->ops = &gsc_m2m_qops;
606 dst_vq->mem_ops = &vb2_dma_contig_memops;
607 dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
608 dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
610 return vb2_queue_init(dst_vq);
613 static int gsc_m2m_open(struct file *file)
615 struct gsc_dev *gsc = video_drvdata(file);
616 struct gsc_ctx *ctx = NULL;
619 pr_debug("pid: %d, state: 0x%lx", task_pid_nr(current), gsc->state);
621 if (mutex_lock_interruptible(&gsc->lock))
624 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
630 v4l2_fh_init(&ctx->fh, gsc->m2m.vfd);
631 ret = gsc_ctrls_create(ctx);
635 /* Use separate control handler per file handle */
636 ctx->fh.ctrl_handler = &ctx->ctrl_handler;
637 file->private_data = &ctx->fh;
638 v4l2_fh_add(&ctx->fh);
641 /* Default color format */
642 ctx->s_frame.fmt = get_format(0);
643 ctx->d_frame.fmt = get_format(0);
644 /* Setup the device context for mem2mem mode. */
645 ctx->state = GSC_CTX_M2M;
647 ctx->in_path = GSC_DMA;
648 ctx->out_path = GSC_DMA;
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);
657 if (gsc->m2m.refcnt++ == 0)
658 set_bit(ST_M2M_OPEN, &gsc->state);
660 pr_debug("gsc m2m driver is opened, ctx(0x%p)", ctx);
662 mutex_unlock(&gsc->lock);
666 gsc_ctrls_delete(ctx);
668 v4l2_fh_del(&ctx->fh);
669 v4l2_fh_exit(&ctx->fh);
672 mutex_unlock(&gsc->lock);
676 static int gsc_m2m_release(struct file *file)
678 struct gsc_ctx *ctx = fh_to_ctx(file->private_data);
679 struct gsc_dev *gsc = ctx->gsc_dev;
681 pr_debug("pid: %d, state: 0x%lx, refcnt= %d",
682 task_pid_nr(current), gsc->state, gsc->m2m.refcnt);
684 mutex_lock(&gsc->lock);
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);
691 if (--gsc->m2m.refcnt <= 0)
692 clear_bit(ST_M2M_OPEN, &gsc->state);
695 mutex_unlock(&gsc->lock);
699 static unsigned int gsc_m2m_poll(struct file *file,
700 struct poll_table_struct *wait)
702 struct gsc_ctx *ctx = fh_to_ctx(file->private_data);
703 struct gsc_dev *gsc = ctx->gsc_dev;
706 if (mutex_lock_interruptible(&gsc->lock))
709 ret = v4l2_m2m_poll(file, ctx->m2m_ctx, wait);
710 mutex_unlock(&gsc->lock);
715 static int gsc_m2m_mmap(struct file *file, struct vm_area_struct *vma)
717 struct gsc_ctx *ctx = fh_to_ctx(file->private_data);
718 struct gsc_dev *gsc = ctx->gsc_dev;
721 if (mutex_lock_interruptible(&gsc->lock))
724 ret = v4l2_m2m_mmap(file, ctx->m2m_ctx, vma);
725 mutex_unlock(&gsc->lock);
730 static 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,
739 static struct v4l2_m2m_ops gsc_m2m_ops = {
740 .device_run = gsc_m2m_device_run,
741 .job_abort = gsc_m2m_job_abort,
744 int gsc_register_m2m_device(struct gsc_dev *gsc)
746 struct platform_device *pdev;
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 snprintf(gsc->vdev.name, sizeof(gsc->vdev.name), "%s.%d:m2m",
761 GSC_MODULE_NAME, gsc->id);
763 video_set_drvdata(&gsc->vdev, gsc);
765 gsc->m2m.vfd = &gsc->vdev;
766 gsc->m2m.m2m_dev = v4l2_m2m_init(&gsc_m2m_ops);
767 if (IS_ERR(gsc->m2m.m2m_dev)) {
768 dev_err(&pdev->dev, "failed to initialize v4l2-m2m device\n");
769 ret = PTR_ERR(gsc->m2m.m2m_dev);
773 ret = video_register_device(&gsc->vdev, VFL_TYPE_GRABBER, -1);
776 "%s(): failed to register video device\n", __func__);
780 pr_debug("gsc m2m driver registered as /dev/video%d", gsc->vdev.num);
784 v4l2_m2m_release(gsc->m2m.m2m_dev);
786 video_device_release(gsc->m2m.vfd);
791 void gsc_unregister_m2m_device(struct gsc_dev *gsc)
794 v4l2_m2m_release(gsc->m2m.m2m_dev);