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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * Samsung S5P/EXYNOS4 SoC series FIMC (video postprocessor) driver4 *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 31static 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	else36		return FMT_FLAGS_M2M_OUT;37}38 39void 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. */59static 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 73static int start_streaming(struct vb2_queue *q, unsigned int count)74{75	struct fimc_ctx *ctx = q->drv_priv;76 77	return pm_runtime_resume_and_get(&ctx->fimc_dev->pdev->dev);78}79 80static void stop_streaming(struct vb2_queue *q)81{82	struct fimc_ctx *ctx = q->drv_priv;83 84	fimc_m2m_shutdown(ctx);85	fimc_m2m_job_finish(ctx, VB2_BUF_STATE_ERROR);86	pm_runtime_put(&ctx->fimc_dev->pdev->dev);87}88 89static void fimc_device_run(void *priv)90{91	struct vb2_v4l2_buffer *src_vb, *dst_vb;92	struct fimc_ctx *ctx = priv;93	struct fimc_frame *sf, *df;94	struct fimc_dev *fimc;95	unsigned long flags;96	int ret;97 98	if (WARN(!ctx, "Null context\n"))99		return;100 101	fimc = ctx->fimc_dev;102	spin_lock_irqsave(&fimc->slock, flags);103 104	set_bit(ST_M2M_PEND, &fimc->state);105	sf = &ctx->s_frame;106	df = &ctx->d_frame;107 108	if (ctx->state & FIMC_PARAMS) {109		/* Prepare the DMA offsets for scaler */110		fimc_prepare_dma_offset(ctx, sf);111		fimc_prepare_dma_offset(ctx, df);112	}113 114	src_vb = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx);115	ret = fimc_prepare_addr(ctx, &src_vb->vb2_buf, sf, &sf->addr);116	if (ret)117		goto dma_unlock;118 119	dst_vb = v4l2_m2m_next_dst_buf(ctx->fh.m2m_ctx);120	ret = fimc_prepare_addr(ctx, &dst_vb->vb2_buf, df, &df->addr);121	if (ret)122		goto dma_unlock;123 124	dst_vb->vb2_buf.timestamp = src_vb->vb2_buf.timestamp;125	dst_vb->flags &= ~V4L2_BUF_FLAG_TSTAMP_SRC_MASK;126	dst_vb->flags |=127		src_vb->flags & V4L2_BUF_FLAG_TSTAMP_SRC_MASK;128 129	/* Reconfigure hardware if the context has changed. */130	if (fimc->m2m.ctx != ctx) {131		ctx->state |= FIMC_PARAMS;132		fimc->m2m.ctx = ctx;133	}134 135	if (ctx->state & FIMC_PARAMS) {136		fimc_set_yuv_order(ctx);137		fimc_hw_set_input_path(ctx);138		fimc_hw_set_in_dma(ctx);139		ret = fimc_set_scaler_info(ctx);140		if (ret)141			goto dma_unlock;142		fimc_hw_set_prescaler(ctx);143		fimc_hw_set_mainscaler(ctx);144		fimc_hw_set_target_format(ctx);145		fimc_hw_set_rotation(ctx);146		fimc_hw_set_effect(ctx);147		fimc_hw_set_out_dma(ctx);148		if (fimc->drv_data->alpha_color)149			fimc_hw_set_rgb_alpha(ctx);150		fimc_hw_set_output_path(ctx);151	}152	fimc_hw_set_input_addr(fimc, &sf->addr);153	fimc_hw_set_output_addr(fimc, &df->addr, -1);154 155	fimc_activate_capture(ctx);156	ctx->state &= (FIMC_CTX_M2M | FIMC_CTX_CAP);157	fimc_hw_activate_input_dma(fimc, true);158 159dma_unlock:160	spin_unlock_irqrestore(&fimc->slock, flags);161}162 163static void fimc_job_abort(void *priv)164{165	fimc_m2m_shutdown(priv);166}167 168static int fimc_queue_setup(struct vb2_queue *vq,169			    unsigned int *num_buffers, unsigned int *num_planes,170			    unsigned int sizes[], struct device *alloc_devs[])171{172	struct fimc_ctx *ctx = vb2_get_drv_priv(vq);173	const struct fimc_frame *f;174	int i;175 176	f = ctx_get_frame(ctx, vq->type);177	if (IS_ERR(f))178		return PTR_ERR(f);179	/*180	 * Return number of non-contiguous planes (plane buffers)181	 * depending on the configured color format.182	 */183	if (!f->fmt)184		return -EINVAL;185 186	*num_planes = f->fmt->memplanes;187	for (i = 0; i < f->fmt->memplanes; i++)188		sizes[i] = f->payload[i];189	return 0;190}191 192static int fimc_buf_prepare(struct vb2_buffer *vb)193{194	struct fimc_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);195	const struct fimc_frame *frame;196	int i;197 198	frame = ctx_get_frame(ctx, vb->vb2_queue->type);199	if (IS_ERR(frame))200		return PTR_ERR(frame);201 202	for (i = 0; i < frame->fmt->memplanes; i++)203		vb2_set_plane_payload(vb, i, frame->payload[i]);204 205	return 0;206}207 208static void fimc_buf_queue(struct vb2_buffer *vb)209{210	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);211	struct fimc_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);212	v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);213}214 215static const struct vb2_ops fimc_qops = {216	.queue_setup	 = fimc_queue_setup,217	.buf_prepare	 = fimc_buf_prepare,218	.buf_queue	 = fimc_buf_queue,219	.wait_prepare	 = vb2_ops_wait_prepare,220	.wait_finish	 = vb2_ops_wait_finish,221	.stop_streaming	 = stop_streaming,222	.start_streaming = start_streaming,223};224 225/*226 * V4L2 ioctl handlers227 */228static int fimc_m2m_querycap(struct file *file, void *fh,229				     struct v4l2_capability *cap)230{231	struct fimc_dev *fimc = video_drvdata(file);232 233	__fimc_vidioc_querycap(&fimc->pdev->dev, cap);234	return 0;235}236 237static int fimc_m2m_enum_fmt(struct file *file, void *priv,238			     struct v4l2_fmtdesc *f)239{240	const struct fimc_fmt *fmt;241 242	fmt = fimc_find_format(NULL, NULL, get_m2m_fmt_flags(f->type),243			       f->index);244	if (!fmt)245		return -EINVAL;246 247	f->pixelformat = fmt->fourcc;248	return 0;249}250 251static int fimc_m2m_g_fmt_mplane(struct file *file, void *fh,252				 struct v4l2_format *f)253{254	struct fimc_ctx *ctx = fh_to_ctx(fh);255	const struct fimc_frame *frame = ctx_get_frame(ctx, f->type);256 257	if (IS_ERR(frame))258		return PTR_ERR(frame);259 260	__fimc_get_format(frame, f);261	return 0;262}263 264static int fimc_try_fmt_mplane(struct fimc_ctx *ctx, struct v4l2_format *f)265{266	struct fimc_dev *fimc = ctx->fimc_dev;267	const struct fimc_variant *variant = fimc->variant;268	struct v4l2_pix_format_mplane *pix = &f->fmt.pix_mp;269	const struct fimc_fmt *fmt;270	u32 max_w, mod_x, mod_y;271 272	if (!IS_M2M(f->type))273		return -EINVAL;274 275	fmt = fimc_find_format(&pix->pixelformat, NULL,276			       get_m2m_fmt_flags(f->type), 0);277	if (WARN(fmt == NULL, "Pixel format lookup failed"))278		return -EINVAL;279 280	if (pix->field == V4L2_FIELD_ANY)281		pix->field = V4L2_FIELD_NONE;282	else if (pix->field != V4L2_FIELD_NONE)283		return -EINVAL;284 285	if (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {286		max_w = variant->pix_limit->scaler_dis_w;287		mod_x = ffs(variant->min_inp_pixsize) - 1;288	} else {289		max_w = variant->pix_limit->out_rot_dis_w;290		mod_x = ffs(variant->min_out_pixsize) - 1;291	}292 293	if (tiled_fmt(fmt)) {294		mod_x = 6; /* 64 x 32 pixels tile */295		mod_y = 5;296	} else {297		if (variant->min_vsize_align == 1)298			mod_y = fimc_fmt_is_rgb(fmt->color) ? 0 : 1;299		else300			mod_y = ffs(variant->min_vsize_align) - 1;301	}302 303	v4l_bound_align_image(&pix->width, 16, max_w, mod_x,304		&pix->height, 8, variant->pix_limit->scaler_dis_w, mod_y, 0);305 306	fimc_adjust_mplane_format(fmt, pix->width, pix->height, &f->fmt.pix_mp);307	return 0;308}309 310static int fimc_m2m_try_fmt_mplane(struct file *file, void *fh,311				   struct v4l2_format *f)312{313	struct fimc_ctx *ctx = fh_to_ctx(fh);314	return fimc_try_fmt_mplane(ctx, f);315}316 317static void __set_frame_format(struct fimc_frame *frame,318			       const struct fimc_fmt *fmt,319			       const struct v4l2_pix_format_mplane *pixm)320{321	int i;322 323	for (i = 0; i < fmt->memplanes; i++) {324		frame->bytesperline[i] = pixm->plane_fmt[i].bytesperline;325		frame->payload[i] = pixm->plane_fmt[i].sizeimage;326	}327 328	frame->f_width = pixm->width;329	frame->f_height	= pixm->height;330	frame->o_width = pixm->width;331	frame->o_height = pixm->height;332	frame->width = pixm->width;333	frame->height = pixm->height;334	frame->offs_h = 0;335	frame->offs_v = 0;336	frame->fmt = fmt;337}338 339static int fimc_m2m_s_fmt_mplane(struct file *file, void *fh,340				 struct v4l2_format *f)341{342	struct fimc_ctx *ctx = fh_to_ctx(fh);343	struct fimc_dev *fimc = ctx->fimc_dev;344	const struct fimc_fmt *fmt;345	struct vb2_queue *vq;346	struct fimc_frame *frame;347	int ret;348 349	ret = fimc_try_fmt_mplane(ctx, f);350	if (ret)351		return ret;352 353	vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);354 355	if (vb2_is_busy(vq)) {356		v4l2_err(&fimc->m2m.vfd, "queue (%d) busy\n", f->type);357		return -EBUSY;358	}359 360	if (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)361		frame = &ctx->s_frame;362	else363		frame = &ctx->d_frame;364 365	fmt = fimc_find_format(&f->fmt.pix_mp.pixelformat, NULL,366			       get_m2m_fmt_flags(f->type), 0);367	if (!fmt)368		return -EINVAL;369 370	__set_frame_format(frame, fmt, &f->fmt.pix_mp);371 372	/* Update RGB Alpha control state and value range */373	fimc_alpha_ctrl_update(ctx);374 375	return 0;376}377 378static int fimc_m2m_g_selection(struct file *file, void *fh,379				struct v4l2_selection *s)380{381	struct fimc_ctx *ctx = fh_to_ctx(fh);382	const struct fimc_frame *frame;383 384	frame = ctx_get_frame(ctx, s->type);385	if (IS_ERR(frame))386		return PTR_ERR(frame);387 388	switch (s->target) {389	case V4L2_SEL_TGT_CROP:390	case V4L2_SEL_TGT_CROP_DEFAULT:391	case V4L2_SEL_TGT_CROP_BOUNDS:392		if (s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)393			return -EINVAL;394		break;395	case V4L2_SEL_TGT_COMPOSE:396	case V4L2_SEL_TGT_COMPOSE_DEFAULT:397	case V4L2_SEL_TGT_COMPOSE_BOUNDS:398		if (s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)399			return -EINVAL;400		break;401	default:402		return -EINVAL;403	}404 405	switch (s->target) {406	case V4L2_SEL_TGT_CROP:407	case V4L2_SEL_TGT_COMPOSE:408		s->r.left = frame->offs_h;409		s->r.top = frame->offs_v;410		s->r.width = frame->width;411		s->r.height = frame->height;412		break;413	case V4L2_SEL_TGT_CROP_DEFAULT:414	case V4L2_SEL_TGT_CROP_BOUNDS:415	case V4L2_SEL_TGT_COMPOSE_DEFAULT:416	case V4L2_SEL_TGT_COMPOSE_BOUNDS:417		s->r.left = 0;418		s->r.top = 0;419		s->r.width = frame->o_width;420		s->r.height = frame->o_height;421		break;422	default:423		return -EINVAL;424	}425	return 0;426}427 428static int fimc_m2m_try_selection(struct fimc_ctx *ctx,429				  struct v4l2_selection *s)430{431	struct fimc_dev *fimc = ctx->fimc_dev;432	const struct fimc_frame *f;433	u32 min_size, halign, depth = 0;434	int i;435 436	if (s->r.top < 0 || s->r.left < 0) {437		v4l2_err(&fimc->m2m.vfd,438			"doesn't support negative values for top & left\n");439		return -EINVAL;440	}441	if (s->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {442		f = &ctx->d_frame;443		if (s->target != V4L2_SEL_TGT_COMPOSE)444			return -EINVAL;445	} else if (s->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {446		f = &ctx->s_frame;447		if (s->target != V4L2_SEL_TGT_CROP)448			return -EINVAL;449	} else {450		return -EINVAL;451	}452 453	min_size = (f == &ctx->s_frame) ?454		fimc->variant->min_inp_pixsize : fimc->variant->min_out_pixsize;455 456	/* Get pixel alignment constraints. */457	if (fimc->variant->min_vsize_align == 1)458		halign = fimc_fmt_is_rgb(f->fmt->color) ? 0 : 1;459	else460		halign = ffs(fimc->variant->min_vsize_align) - 1;461 462	for (i = 0; i < f->fmt->memplanes; i++)463		depth += f->fmt->depth[i];464 465	v4l_bound_align_image(&s->r.width, min_size, f->o_width,466			      ffs(min_size) - 1,467			      &s->r.height, min_size, f->o_height,468			      halign, 64/(ALIGN(depth, 8)));469 470	/* adjust left/top if cropping rectangle is out of bounds */471	if (s->r.left + s->r.width > f->o_width)472		s->r.left = f->o_width - s->r.width;473	if (s->r.top + s->r.height > f->o_height)474		s->r.top = f->o_height - s->r.height;475 476	s->r.left = round_down(s->r.left, min_size);477	s->r.top  = round_down(s->r.top, fimc->variant->hor_offs_align);478 479	dbg("l:%d, t:%d, w:%d, h:%d, f_w: %d, f_h: %d",480	    s->r.left, s->r.top, s->r.width, s->r.height,481	    f->f_width, f->f_height);482 483	return 0;484}485 486static int fimc_m2m_s_selection(struct file *file, void *fh,487				struct v4l2_selection *s)488{489	struct fimc_ctx *ctx = fh_to_ctx(fh);490	struct fimc_dev *fimc = ctx->fimc_dev;491	struct fimc_frame *f;492	int ret;493 494	ret = fimc_m2m_try_selection(ctx, s);495	if (ret)496		return ret;497 498	f = (s->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) ?499		&ctx->s_frame : &ctx->d_frame;500 501	/* Check to see if scaling ratio is within supported range */502	if (s->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {503		ret = fimc_check_scaler_ratio(ctx, s->r.width,504				s->r.height, ctx->d_frame.width,505				ctx->d_frame.height, ctx->rotation);506	} else {507		ret = fimc_check_scaler_ratio(ctx, ctx->s_frame.width,508				ctx->s_frame.height, s->r.width,509				s->r.height, ctx->rotation);510	}511	if (ret) {512		v4l2_err(&fimc->m2m.vfd, "Out of scaler range\n");513		return -EINVAL;514	}515 516	f->offs_h = s->r.left;517	f->offs_v = s->r.top;518	f->width  = s->r.width;519	f->height = s->r.height;520 521	fimc_ctx_state_set(FIMC_PARAMS, ctx);522 523	return 0;524}525 526static const struct v4l2_ioctl_ops fimc_m2m_ioctl_ops = {527	.vidioc_querycap		= fimc_m2m_querycap,528	.vidioc_enum_fmt_vid_cap	= fimc_m2m_enum_fmt,529	.vidioc_enum_fmt_vid_out	= fimc_m2m_enum_fmt,530	.vidioc_g_fmt_vid_cap_mplane	= fimc_m2m_g_fmt_mplane,531	.vidioc_g_fmt_vid_out_mplane	= fimc_m2m_g_fmt_mplane,532	.vidioc_try_fmt_vid_cap_mplane	= fimc_m2m_try_fmt_mplane,533	.vidioc_try_fmt_vid_out_mplane	= fimc_m2m_try_fmt_mplane,534	.vidioc_s_fmt_vid_cap_mplane	= fimc_m2m_s_fmt_mplane,535	.vidioc_s_fmt_vid_out_mplane	= fimc_m2m_s_fmt_mplane,536	.vidioc_reqbufs			= v4l2_m2m_ioctl_reqbufs,537	.vidioc_querybuf		= v4l2_m2m_ioctl_querybuf,538	.vidioc_qbuf			= v4l2_m2m_ioctl_qbuf,539	.vidioc_dqbuf			= v4l2_m2m_ioctl_dqbuf,540	.vidioc_expbuf			= v4l2_m2m_ioctl_expbuf,541	.vidioc_streamon		= v4l2_m2m_ioctl_streamon,542	.vidioc_streamoff		= v4l2_m2m_ioctl_streamoff,543	.vidioc_g_selection		= fimc_m2m_g_selection,544	.vidioc_s_selection		= fimc_m2m_s_selection,545 546};547 548static int queue_init(void *priv, struct vb2_queue *src_vq,549		      struct vb2_queue *dst_vq)550{551	struct fimc_ctx *ctx = priv;552	int ret;553 554	src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;555	src_vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;556	src_vq->drv_priv = ctx;557	src_vq->ops = &fimc_qops;558	src_vq->mem_ops = &vb2_dma_contig_memops;559	src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);560	src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;561	src_vq->lock = &ctx->fimc_dev->lock;562	src_vq->dev = &ctx->fimc_dev->pdev->dev;563 564	ret = vb2_queue_init(src_vq);565	if (ret)566		return ret;567 568	dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;569	dst_vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;570	dst_vq->drv_priv = ctx;571	dst_vq->ops = &fimc_qops;572	dst_vq->mem_ops = &vb2_dma_contig_memops;573	dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);574	dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;575	dst_vq->lock = &ctx->fimc_dev->lock;576	dst_vq->dev = &ctx->fimc_dev->pdev->dev;577 578	return vb2_queue_init(dst_vq);579}580 581static 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	const 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 604static 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 the616	 * 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 665error_m2m_ctx:666	v4l2_m2m_ctx_release(ctx->fh.m2m_ctx);667error_c:668	fimc_ctrls_delete(ctx);669	v4l2_fh_del(&ctx->fh);670error_fh:671	v4l2_fh_exit(&ctx->fh);672	kfree(ctx);673unlock:674	mutex_unlock(&fimc->lock);675	return ret;676}677 678static 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 701static 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 710static const struct v4l2_m2m_ops m2m_ops = {711	.device_run	= fimc_device_run,712	.job_abort	= fimc_job_abort,713};714 715int 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	vfd->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_M2M_MPLANE;732	set_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags);733 734	snprintf(vfd->name, sizeof(vfd->name), "fimc.%d.m2m", fimc->id);735	video_set_drvdata(vfd, fimc);736 737	fimc->m2m.m2m_dev = v4l2_m2m_init(&m2m_ops);738	if (IS_ERR(fimc->m2m.m2m_dev)) {739		v4l2_err(v4l2_dev, "failed to initialize v4l2-m2m device\n");740		return PTR_ERR(fimc->m2m.m2m_dev);741	}742 743	ret = media_entity_pads_init(&vfd->entity, 0, NULL);744	if (ret)745		goto err_me;746 747	ret = video_register_device(vfd, VFL_TYPE_VIDEO, -1);748	if (ret)749		goto err_vd;750 751	v4l2_info(v4l2_dev, "Registered %s as /dev/%s\n",752		  vfd->name, video_device_node_name(vfd));753	return 0;754 755err_vd:756	media_entity_cleanup(&vfd->entity);757err_me:758	v4l2_m2m_release(fimc->m2m.m2m_dev);759	return ret;760}761 762void fimc_unregister_m2m_device(struct fimc_dev *fimc)763{764	if (!fimc)765		return;766 767	if (fimc->m2m.m2m_dev)768		v4l2_m2m_release(fimc->m2m.m2m_dev);769 770	if (video_is_registered(&fimc->m2m.vfd)) {771		video_unregister_device(&fimc->m2m.vfd);772		media_entity_cleanup(&fimc->m2m.vfd.entity);773	}774}775