From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Wed, 5 Aug 2015 17:04:01 -0300 Subject: Initial import --- drivers/media/platform/exynos4-is/fimc-m2m.c | 772 +++++++++++++++++++++++++++ 1 file changed, 772 insertions(+) create mode 100644 drivers/media/platform/exynos4-is/fimc-m2m.c (limited to 'drivers/media/platform/exynos4-is/fimc-m2m.c') diff --git a/drivers/media/platform/exynos4-is/fimc-m2m.c b/drivers/media/platform/exynos4-is/fimc-m2m.c new file mode 100644 index 000000000..0ad1b6f84 --- /dev/null +++ b/drivers/media/platform/exynos4-is/fimc-m2m.c @@ -0,0 +1,772 @@ +/* + * Samsung S5P/EXYNOS4 SoC series FIMC (video postprocessor) driver + * + * Copyright (C) 2012 - 2013 Samsung Electronics Co., Ltd. + * Sylwester Nawrocki + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published + * by the Free Software Foundation, either version 2 of the License, + * or (at your option) any later version. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "common.h" +#include "fimc-core.h" +#include "fimc-reg.h" +#include "media-dev.h" + +static unsigned int get_m2m_fmt_flags(unsigned int stream_type) +{ + if (stream_type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) + return FMT_FLAGS_M2M_IN; + else + return FMT_FLAGS_M2M_OUT; +} + +void fimc_m2m_job_finish(struct fimc_ctx *ctx, int vb_state) +{ + struct vb2_buffer *src_vb, *dst_vb; + + if (!ctx || !ctx->fh.m2m_ctx) + return; + + src_vb = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx); + dst_vb = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx); + + if (src_vb && dst_vb) { + v4l2_m2m_buf_done(src_vb, vb_state); + v4l2_m2m_buf_done(dst_vb, vb_state); + v4l2_m2m_job_finish(ctx->fimc_dev->m2m.m2m_dev, + ctx->fh.m2m_ctx); + } +} + +/* Complete the transaction which has been scheduled for execution. */ +static int fimc_m2m_shutdown(struct fimc_ctx *ctx) +{ + struct fimc_dev *fimc = ctx->fimc_dev; + int ret; + + if (!fimc_m2m_pending(fimc)) + return 0; + + fimc_ctx_state_set(FIMC_CTX_SHUT, ctx); + + ret = wait_event_timeout(fimc->irq_queue, + !fimc_ctx_state_is_set(FIMC_CTX_SHUT, ctx), + FIMC_SHUTDOWN_TIMEOUT); + + return ret == 0 ? -ETIMEDOUT : ret; +} + +static int start_streaming(struct vb2_queue *q, unsigned int count) +{ + struct fimc_ctx *ctx = q->drv_priv; + int ret; + + ret = pm_runtime_get_sync(&ctx->fimc_dev->pdev->dev); + return ret > 0 ? 0 : ret; +} + +static void stop_streaming(struct vb2_queue *q) +{ + struct fimc_ctx *ctx = q->drv_priv; + int ret; + + ret = fimc_m2m_shutdown(ctx); + if (ret == -ETIMEDOUT) + fimc_m2m_job_finish(ctx, VB2_BUF_STATE_ERROR); + + pm_runtime_put(&ctx->fimc_dev->pdev->dev); +} + +static void fimc_device_run(void *priv) +{ + struct vb2_buffer *src_vb, *dst_vb; + struct fimc_ctx *ctx = priv; + struct fimc_frame *sf, *df; + struct fimc_dev *fimc; + unsigned long flags; + int ret; + + if (WARN(!ctx, "Null context\n")) + return; + + fimc = ctx->fimc_dev; + spin_lock_irqsave(&fimc->slock, flags); + + set_bit(ST_M2M_PEND, &fimc->state); + sf = &ctx->s_frame; + df = &ctx->d_frame; + + if (ctx->state & FIMC_PARAMS) { + /* Prepare the DMA offsets for scaler */ + fimc_prepare_dma_offset(ctx, sf); + fimc_prepare_dma_offset(ctx, df); + } + + src_vb = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx); + ret = fimc_prepare_addr(ctx, src_vb, sf, &sf->paddr); + if (ret) + goto dma_unlock; + + dst_vb = v4l2_m2m_next_dst_buf(ctx->fh.m2m_ctx); + ret = fimc_prepare_addr(ctx, dst_vb, df, &df->paddr); + if (ret) + goto dma_unlock; + + dst_vb->v4l2_buf.timestamp = src_vb->v4l2_buf.timestamp; + dst_vb->v4l2_buf.flags &= ~V4L2_BUF_FLAG_TSTAMP_SRC_MASK; + dst_vb->v4l2_buf.flags |= + src_vb->v4l2_buf.flags & V4L2_BUF_FLAG_TSTAMP_SRC_MASK; + + /* Reconfigure hardware if the context has changed. */ + if (fimc->m2m.ctx != ctx) { + ctx->state |= FIMC_PARAMS; + fimc->m2m.ctx = ctx; + } + + if (ctx->state & FIMC_PARAMS) { + fimc_set_yuv_order(ctx); + fimc_hw_set_input_path(ctx); + fimc_hw_set_in_dma(ctx); + ret = fimc_set_scaler_info(ctx); + if (ret) + goto dma_unlock; + fimc_hw_set_prescaler(ctx); + fimc_hw_set_mainscaler(ctx); + fimc_hw_set_target_format(ctx); + fimc_hw_set_rotation(ctx); + fimc_hw_set_effect(ctx); + fimc_hw_set_out_dma(ctx); + if (fimc->drv_data->alpha_color) + fimc_hw_set_rgb_alpha(ctx); + fimc_hw_set_output_path(ctx); + } + fimc_hw_set_input_addr(fimc, &sf->paddr); + fimc_hw_set_output_addr(fimc, &df->paddr, -1); + + fimc_activate_capture(ctx); + ctx->state &= (FIMC_CTX_M2M | FIMC_CTX_CAP); + fimc_hw_activate_input_dma(fimc, true); + +dma_unlock: + spin_unlock_irqrestore(&fimc->slock, flags); +} + +static void fimc_job_abort(void *priv) +{ + fimc_m2m_shutdown(priv); +} + +static int 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[]) +{ + struct fimc_ctx *ctx = vb2_get_drv_priv(vq); + struct fimc_frame *f; + int i; + + f = ctx_get_frame(ctx, vq->type); + if (IS_ERR(f)) + return PTR_ERR(f); + /* + * Return number of non-contigous planes (plane buffers) + * depending on the configured color format. + */ + if (!f->fmt) + return -EINVAL; + + *num_planes = f->fmt->memplanes; + for (i = 0; i < f->fmt->memplanes; i++) { + sizes[i] = f->payload[i]; + allocators[i] = ctx->fimc_dev->alloc_ctx; + } + return 0; +} + +static int fimc_buf_prepare(struct vb2_buffer *vb) +{ + struct fimc_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue); + struct fimc_frame *frame; + int i; + + frame = ctx_get_frame(ctx, vb->vb2_queue->type); + if (IS_ERR(frame)) + return PTR_ERR(frame); + + for (i = 0; i < frame->fmt->memplanes; i++) + vb2_set_plane_payload(vb, i, frame->payload[i]); + + return 0; +} + +static void fimc_buf_queue(struct vb2_buffer *vb) +{ + struct fimc_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue); + v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vb); +} + +static struct vb2_ops fimc_qops = { + .queue_setup = fimc_queue_setup, + .buf_prepare = fimc_buf_prepare, + .buf_queue = fimc_buf_queue, + .wait_prepare = vb2_ops_wait_prepare, + .wait_finish = vb2_ops_wait_finish, + .stop_streaming = stop_streaming, + .start_streaming = start_streaming, +}; + +/* + * V4L2 ioctl handlers + */ +static int fimc_m2m_querycap(struct file *file, void *fh, + struct v4l2_capability *cap) +{ + struct fimc_dev *fimc = video_drvdata(file); + unsigned int caps; + + /* + * This is only a mem-to-mem video device. The capture and output + * device capability flags are left only for backward compatibility + * and are scheduled for removal. + */ + caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_M2M_MPLANE | + V4L2_CAP_VIDEO_CAPTURE_MPLANE | V4L2_CAP_VIDEO_OUTPUT_MPLANE; + + __fimc_vidioc_querycap(&fimc->pdev->dev, cap, caps); + return 0; +} + +static int fimc_m2m_enum_fmt_mplane(struct file *file, void *priv, + struct v4l2_fmtdesc *f) +{ + struct fimc_fmt *fmt; + + fmt = fimc_find_format(NULL, NULL, get_m2m_fmt_flags(f->type), + f->index); + if (!fmt) + return -EINVAL; + + strncpy(f->description, fmt->name, sizeof(f->description) - 1); + f->pixelformat = fmt->fourcc; + return 0; +} + +static int fimc_m2m_g_fmt_mplane(struct file *file, void *fh, + struct v4l2_format *f) +{ + struct fimc_ctx *ctx = fh_to_ctx(fh); + struct fimc_frame *frame = ctx_get_frame(ctx, f->type); + + if (IS_ERR(frame)) + return PTR_ERR(frame); + + __fimc_get_format(frame, f); + return 0; +} + +static int fimc_try_fmt_mplane(struct fimc_ctx *ctx, struct v4l2_format *f) +{ + struct fimc_dev *fimc = ctx->fimc_dev; + const struct fimc_variant *variant = fimc->variant; + struct v4l2_pix_format_mplane *pix = &f->fmt.pix_mp; + struct fimc_fmt *fmt; + u32 max_w, mod_x, mod_y; + + if (!IS_M2M(f->type)) + return -EINVAL; + + fmt = fimc_find_format(&pix->pixelformat, NULL, + get_m2m_fmt_flags(f->type), 0); + if (WARN(fmt == NULL, "Pixel format lookup failed")) + return -EINVAL; + + if (pix->field == V4L2_FIELD_ANY) + pix->field = V4L2_FIELD_NONE; + else if (pix->field != V4L2_FIELD_NONE) + return -EINVAL; + + if (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) { + max_w = variant->pix_limit->scaler_dis_w; + mod_x = ffs(variant->min_inp_pixsize) - 1; + } else { + max_w = variant->pix_limit->out_rot_dis_w; + mod_x = ffs(variant->min_out_pixsize) - 1; + } + + if (tiled_fmt(fmt)) { + mod_x = 6; /* 64 x 32 pixels tile */ + mod_y = 5; + } else { + if (variant->min_vsize_align == 1) + mod_y = fimc_fmt_is_rgb(fmt->color) ? 0 : 1; + else + mod_y = ffs(variant->min_vsize_align) - 1; + } + + v4l_bound_align_image(&pix->width, 16, max_w, mod_x, + &pix->height, 8, variant->pix_limit->scaler_dis_w, mod_y, 0); + + fimc_adjust_mplane_format(fmt, pix->width, pix->height, &f->fmt.pix_mp); + return 0; +} + +static int fimc_m2m_try_fmt_mplane(struct file *file, void *fh, + struct v4l2_format *f) +{ + struct fimc_ctx *ctx = fh_to_ctx(fh); + return fimc_try_fmt_mplane(ctx, f); +} + +static void __set_frame_format(struct fimc_frame *frame, struct fimc_fmt *fmt, + struct v4l2_pix_format_mplane *pixm) +{ + int i; + + for (i = 0; i < fmt->memplanes; i++) { + frame->bytesperline[i] = pixm->plane_fmt[i].bytesperline; + frame->payload[i] = pixm->plane_fmt[i].sizeimage; + } + + frame->f_width = pixm->width; + frame->f_height = pixm->height; + frame->o_width = pixm->width; + frame->o_height = pixm->height; + frame->width = pixm->width; + frame->height = pixm->height; + frame->offs_h = 0; + frame->offs_v = 0; + frame->fmt = fmt; +} + +static int fimc_m2m_s_fmt_mplane(struct file *file, void *fh, + struct v4l2_format *f) +{ + struct fimc_ctx *ctx = fh_to_ctx(fh); + struct fimc_dev *fimc = ctx->fimc_dev; + struct fimc_fmt *fmt; + struct vb2_queue *vq; + struct fimc_frame *frame; + int ret; + + ret = fimc_try_fmt_mplane(ctx, f); + if (ret) + return ret; + + vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type); + + if (vb2_is_busy(vq)) { + v4l2_err(&fimc->m2m.vfd, "queue (%d) busy\n", f->type); + return -EBUSY; + } + + if (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) + frame = &ctx->s_frame; + else + frame = &ctx->d_frame; + + fmt = fimc_find_format(&f->fmt.pix_mp.pixelformat, NULL, + get_m2m_fmt_flags(f->type), 0); + if (!fmt) + return -EINVAL; + + __set_frame_format(frame, fmt, &f->fmt.pix_mp); + + /* Update RGB Alpha control state and value range */ + fimc_alpha_ctrl_update(ctx); + + return 0; +} + +static int fimc_m2m_cropcap(struct file *file, void *fh, + struct v4l2_cropcap *cr) +{ + struct fimc_ctx *ctx = fh_to_ctx(fh); + struct fimc_frame *frame; + + frame = ctx_get_frame(ctx, cr->type); + if (IS_ERR(frame)) + return PTR_ERR(frame); + + cr->bounds.left = 0; + cr->bounds.top = 0; + cr->bounds.width = frame->o_width; + cr->bounds.height = frame->o_height; + cr->defrect = cr->bounds; + + return 0; +} + +static int fimc_m2m_g_crop(struct file *file, void *fh, struct v4l2_crop *cr) +{ + struct fimc_ctx *ctx = fh_to_ctx(fh); + struct fimc_frame *frame; + + frame = ctx_get_frame(ctx, cr->type); + if (IS_ERR(frame)) + return PTR_ERR(frame); + + cr->c.left = frame->offs_h; + cr->c.top = frame->offs_v; + cr->c.width = frame->width; + cr->c.height = frame->height; + + return 0; +} + +static int fimc_m2m_try_crop(struct fimc_ctx *ctx, struct v4l2_crop *cr) +{ + struct fimc_dev *fimc = ctx->fimc_dev; + struct fimc_frame *f; + u32 min_size, halign, depth = 0; + int i; + + if (cr->c.top < 0 || cr->c.left < 0) { + v4l2_err(&fimc->m2m.vfd, + "doesn't support negative values for top & left\n"); + return -EINVAL; + } + if (cr->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) + f = &ctx->d_frame; + else if (cr->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) + f = &ctx->s_frame; + else + return -EINVAL; + + min_size = (f == &ctx->s_frame) ? + fimc->variant->min_inp_pixsize : fimc->variant->min_out_pixsize; + + /* Get pixel alignment constraints. */ + if (fimc->variant->min_vsize_align == 1) + halign = fimc_fmt_is_rgb(f->fmt->color) ? 0 : 1; + else + halign = ffs(fimc->variant->min_vsize_align) - 1; + + for (i = 0; i < f->fmt->memplanes; i++) + depth += f->fmt->depth[i]; + + v4l_bound_align_image(&cr->c.width, min_size, f->o_width, + ffs(min_size) - 1, + &cr->c.height, min_size, f->o_height, + halign, 64/(ALIGN(depth, 8))); + + /* adjust left/top if cropping rectangle is out of bounds */ + if (cr->c.left + cr->c.width > f->o_width) + cr->c.left = f->o_width - cr->c.width; + if (cr->c.top + cr->c.height > f->o_height) + cr->c.top = f->o_height - cr->c.height; + + cr->c.left = round_down(cr->c.left, min_size); + cr->c.top = round_down(cr->c.top, fimc->variant->hor_offs_align); + + dbg("l:%d, t:%d, w:%d, h:%d, f_w: %d, f_h: %d", + cr->c.left, cr->c.top, cr->c.width, cr->c.height, + f->f_width, f->f_height); + + return 0; +} + +static int fimc_m2m_s_crop(struct file *file, void *fh, const struct v4l2_crop *crop) +{ + struct fimc_ctx *ctx = fh_to_ctx(fh); + struct fimc_dev *fimc = ctx->fimc_dev; + struct v4l2_crop cr = *crop; + struct fimc_frame *f; + int ret; + + ret = fimc_m2m_try_crop(ctx, &cr); + if (ret) + return ret; + + f = (cr.type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) ? + &ctx->s_frame : &ctx->d_frame; + + /* Check to see if scaling ratio is within supported range */ + if (cr.type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) { + ret = fimc_check_scaler_ratio(ctx, cr.c.width, + cr.c.height, ctx->d_frame.width, + ctx->d_frame.height, ctx->rotation); + } else { + ret = fimc_check_scaler_ratio(ctx, ctx->s_frame.width, + ctx->s_frame.height, cr.c.width, + cr.c.height, ctx->rotation); + } + if (ret) { + v4l2_err(&fimc->m2m.vfd, "Out of scaler range\n"); + return -EINVAL; + } + + f->offs_h = cr.c.left; + f->offs_v = cr.c.top; + f->width = cr.c.width; + f->height = cr.c.height; + + fimc_ctx_state_set(FIMC_PARAMS, ctx); + + return 0; +} + +static const struct v4l2_ioctl_ops fimc_m2m_ioctl_ops = { + .vidioc_querycap = fimc_m2m_querycap, + .vidioc_enum_fmt_vid_cap_mplane = fimc_m2m_enum_fmt_mplane, + .vidioc_enum_fmt_vid_out_mplane = fimc_m2m_enum_fmt_mplane, + .vidioc_g_fmt_vid_cap_mplane = fimc_m2m_g_fmt_mplane, + .vidioc_g_fmt_vid_out_mplane = fimc_m2m_g_fmt_mplane, + .vidioc_try_fmt_vid_cap_mplane = fimc_m2m_try_fmt_mplane, + .vidioc_try_fmt_vid_out_mplane = fimc_m2m_try_fmt_mplane, + .vidioc_s_fmt_vid_cap_mplane = fimc_m2m_s_fmt_mplane, + .vidioc_s_fmt_vid_out_mplane = fimc_m2m_s_fmt_mplane, + .vidioc_reqbufs = v4l2_m2m_ioctl_reqbufs, + .vidioc_querybuf = v4l2_m2m_ioctl_querybuf, + .vidioc_qbuf = v4l2_m2m_ioctl_qbuf, + .vidioc_dqbuf = v4l2_m2m_ioctl_dqbuf, + .vidioc_expbuf = v4l2_m2m_ioctl_expbuf, + .vidioc_streamon = v4l2_m2m_ioctl_streamon, + .vidioc_streamoff = v4l2_m2m_ioctl_streamoff, + .vidioc_g_crop = fimc_m2m_g_crop, + .vidioc_s_crop = fimc_m2m_s_crop, + .vidioc_cropcap = fimc_m2m_cropcap + +}; + +static int queue_init(void *priv, struct vb2_queue *src_vq, + struct vb2_queue *dst_vq) +{ + struct fimc_ctx *ctx = priv; + int ret; + + src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE; + src_vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF; + src_vq->drv_priv = ctx; + src_vq->ops = &fimc_qops; + src_vq->mem_ops = &vb2_dma_contig_memops; + src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer); + src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY; + src_vq->lock = &ctx->fimc_dev->lock; + + ret = vb2_queue_init(src_vq); + if (ret) + return ret; + + dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE; + dst_vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF; + dst_vq->drv_priv = ctx; + dst_vq->ops = &fimc_qops; + dst_vq->mem_ops = &vb2_dma_contig_memops; + dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer); + dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY; + dst_vq->lock = &ctx->fimc_dev->lock; + + return vb2_queue_init(dst_vq); +} + +static int fimc_m2m_set_default_format(struct fimc_ctx *ctx) +{ + struct v4l2_pix_format_mplane pixm = { + .pixelformat = V4L2_PIX_FMT_RGB32, + .width = 800, + .height = 600, + .plane_fmt[0] = { + .bytesperline = 800 * 4, + .sizeimage = 800 * 4 * 600, + }, + }; + struct fimc_fmt *fmt; + + fmt = fimc_find_format(&pixm.pixelformat, NULL, FMT_FLAGS_M2M, 0); + if (!fmt) + return -EINVAL; + + __set_frame_format(&ctx->s_frame, fmt, &pixm); + __set_frame_format(&ctx->d_frame, fmt, &pixm); + + return 0; +} + +static int fimc_m2m_open(struct file *file) +{ + struct fimc_dev *fimc = video_drvdata(file); + struct fimc_ctx *ctx; + int ret = -EBUSY; + + pr_debug("pid: %d, state: %#lx\n", task_pid_nr(current), fimc->state); + + if (mutex_lock_interruptible(&fimc->lock)) + return -ERESTARTSYS; + /* + * Don't allow simultaneous open() of the mem-to-mem and the + * capture video node that belong to same FIMC IP instance. + */ + if (test_bit(ST_CAPT_BUSY, &fimc->state)) + goto unlock; + + ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); + if (!ctx) { + ret = -ENOMEM; + goto unlock; + } + v4l2_fh_init(&ctx->fh, &fimc->m2m.vfd); + ctx->fimc_dev = fimc; + + /* Default color format */ + ctx->s_frame.fmt = fimc_get_format(0); + ctx->d_frame.fmt = fimc_get_format(0); + + ret = fimc_ctrls_create(ctx); + if (ret) + goto error_fh; + + /* Use separate control handler per file handle */ + ctx->fh.ctrl_handler = &ctx->ctrls.handler; + file->private_data = &ctx->fh; + v4l2_fh_add(&ctx->fh); + + /* Setup the device context for memory-to-memory mode */ + ctx->state = FIMC_CTX_M2M; + ctx->flags = 0; + ctx->in_path = FIMC_IO_DMA; + ctx->out_path = FIMC_IO_DMA; + ctx->scaler.enabled = 1; + + ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(fimc->m2m.m2m_dev, ctx, queue_init); + if (IS_ERR(ctx->fh.m2m_ctx)) { + ret = PTR_ERR(ctx->fh.m2m_ctx); + goto error_c; + } + + if (fimc->m2m.refcnt++ == 0) + set_bit(ST_M2M_RUN, &fimc->state); + + ret = fimc_m2m_set_default_format(ctx); + if (ret < 0) + goto error_m2m_ctx; + + mutex_unlock(&fimc->lock); + return 0; + +error_m2m_ctx: + v4l2_m2m_ctx_release(ctx->fh.m2m_ctx); +error_c: + fimc_ctrls_delete(ctx); +error_fh: + v4l2_fh_del(&ctx->fh); + v4l2_fh_exit(&ctx->fh); + kfree(ctx); +unlock: + mutex_unlock(&fimc->lock); + return ret; +} + +static int fimc_m2m_release(struct file *file) +{ + struct fimc_ctx *ctx = fh_to_ctx(file->private_data); + struct fimc_dev *fimc = ctx->fimc_dev; + + dbg("pid: %d, state: 0x%lx, refcnt= %d", + task_pid_nr(current), fimc->state, fimc->m2m.refcnt); + + mutex_lock(&fimc->lock); + + v4l2_m2m_ctx_release(ctx->fh.m2m_ctx); + fimc_ctrls_delete(ctx); + v4l2_fh_del(&ctx->fh); + v4l2_fh_exit(&ctx->fh); + + if (--fimc->m2m.refcnt <= 0) + clear_bit(ST_M2M_RUN, &fimc->state); + kfree(ctx); + + mutex_unlock(&fimc->lock); + return 0; +} + +static const struct v4l2_file_operations fimc_m2m_fops = { + .owner = THIS_MODULE, + .open = fimc_m2m_open, + .release = fimc_m2m_release, + .poll = v4l2_m2m_fop_poll, + .unlocked_ioctl = video_ioctl2, + .mmap = v4l2_m2m_fop_mmap, +}; + +static struct v4l2_m2m_ops m2m_ops = { + .device_run = fimc_device_run, + .job_abort = fimc_job_abort, +}; + +int fimc_register_m2m_device(struct fimc_dev *fimc, + struct v4l2_device *v4l2_dev) +{ + struct video_device *vfd = &fimc->m2m.vfd; + int ret; + + fimc->v4l2_dev = v4l2_dev; + + memset(vfd, 0, sizeof(*vfd)); + vfd->fops = &fimc_m2m_fops; + vfd->ioctl_ops = &fimc_m2m_ioctl_ops; + vfd->v4l2_dev = v4l2_dev; + vfd->minor = -1; + vfd->release = video_device_release_empty; + vfd->lock = &fimc->lock; + vfd->vfl_dir = VFL_DIR_M2M; + + snprintf(vfd->name, sizeof(vfd->name), "fimc.%d.m2m", fimc->id); + video_set_drvdata(vfd, fimc); + + fimc->m2m.m2m_dev = v4l2_m2m_init(&m2m_ops); + if (IS_ERR(fimc->m2m.m2m_dev)) { + v4l2_err(v4l2_dev, "failed to initialize v4l2-m2m device\n"); + return PTR_ERR(fimc->m2m.m2m_dev); + } + + ret = media_entity_init(&vfd->entity, 0, NULL, 0); + if (ret) + goto err_me; + + ret = video_register_device(vfd, VFL_TYPE_GRABBER, -1); + if (ret) + goto err_vd; + + v4l2_info(v4l2_dev, "Registered %s as /dev/%s\n", + vfd->name, video_device_node_name(vfd)); + return 0; + +err_vd: + media_entity_cleanup(&vfd->entity); +err_me: + v4l2_m2m_release(fimc->m2m.m2m_dev); + return ret; +} + +void fimc_unregister_m2m_device(struct fimc_dev *fimc) +{ + if (!fimc) + return; + + if (fimc->m2m.m2m_dev) + v4l2_m2m_release(fimc->m2m.m2m_dev); + + if (video_is_registered(&fimc->m2m.vfd)) { + video_unregister_device(&fimc->m2m.vfd); + media_entity_cleanup(&fimc->m2m.vfd.entity); + } +} -- cgit v1.2.3-54-g00ecf