/* * vsp1_video.c -- R-Car VSP1 Video Node * * Copyright (C) 2013-2014 Renesas Electronics Corporation * * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com) * * 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 "vsp1.h" #include "vsp1_entity.h" #include "vsp1_rwpf.h" #include "vsp1_video.h" #define VSP1_VIDEO_DEF_FORMAT V4L2_PIX_FMT_YUYV #define VSP1_VIDEO_DEF_WIDTH 1024 #define VSP1_VIDEO_DEF_HEIGHT 768 #define VSP1_VIDEO_MIN_WIDTH 2U #define VSP1_VIDEO_MAX_WIDTH 8190U #define VSP1_VIDEO_MIN_HEIGHT 2U #define VSP1_VIDEO_MAX_HEIGHT 8190U /* ----------------------------------------------------------------------------- * Helper functions */ static const struct vsp1_format_info vsp1_video_formats[] = { { V4L2_PIX_FMT_RGB332, V4L2_MBUS_FMT_ARGB8888_1X32, VI6_FMT_RGB_332, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS | VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS, 1, { 8, 0, 0 }, false, false, 1, 1 }, { V4L2_PIX_FMT_RGB444, V4L2_MBUS_FMT_ARGB8888_1X32, VI6_FMT_XRGB_4444, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS | VI6_RPF_DSWAP_P_WDS, 1, { 16, 0, 0 }, false, false, 1, 1 }, { V4L2_PIX_FMT_RGB555, V4L2_MBUS_FMT_ARGB8888_1X32, VI6_FMT_XRGB_1555, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS | VI6_RPF_DSWAP_P_WDS, 1, { 16, 0, 0 }, false, false, 1, 1 }, { V4L2_PIX_FMT_RGB565, V4L2_MBUS_FMT_ARGB8888_1X32, VI6_FMT_RGB_565, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS | VI6_RPF_DSWAP_P_WDS, 1, { 16, 0, 0 }, false, false, 1, 1 }, { V4L2_PIX_FMT_BGR24, V4L2_MBUS_FMT_ARGB8888_1X32, VI6_FMT_BGR_888, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS | VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS, 1, { 24, 0, 0 }, false, false, 1, 1 }, { V4L2_PIX_FMT_RGB24, V4L2_MBUS_FMT_ARGB8888_1X32, VI6_FMT_RGB_888, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS | VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS, 1, { 24, 0, 0 }, false, false, 1, 1 }, { V4L2_PIX_FMT_BGR32, V4L2_MBUS_FMT_ARGB8888_1X32, VI6_FMT_ARGB_8888, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS, 1, { 32, 0, 0 }, false, false, 1, 1 }, { V4L2_PIX_FMT_RGB32, V4L2_MBUS_FMT_ARGB8888_1X32, VI6_FMT_ARGB_8888, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS | VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS, 1, { 32, 0, 0 }, false, false, 1, 1 }, { V4L2_PIX_FMT_UYVY, V4L2_MBUS_FMT_AYUV8_1X32, VI6_FMT_YUYV_422, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS | VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS, 1, { 16, 0, 0 }, false, false, 2, 1 }, { V4L2_PIX_FMT_VYUY, V4L2_MBUS_FMT_AYUV8_1X32, VI6_FMT_YUYV_422, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS | VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS, 1, { 16, 0, 0 }, false, true, 2, 1 }, { V4L2_PIX_FMT_YUYV, V4L2_MBUS_FMT_AYUV8_1X32, VI6_FMT_YUYV_422, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS | VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS, 1, { 16, 0, 0 }, true, false, 2, 1 }, { V4L2_PIX_FMT_YVYU, V4L2_MBUS_FMT_AYUV8_1X32, VI6_FMT_YUYV_422, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS | VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS, 1, { 16, 0, 0 }, true, true, 2, 1 }, { V4L2_PIX_FMT_NV12M, V4L2_MBUS_FMT_AYUV8_1X32, VI6_FMT_Y_UV_420, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS | VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS, 2, { 8, 16, 0 }, false, false, 2, 2 }, { V4L2_PIX_FMT_NV21M, V4L2_MBUS_FMT_AYUV8_1X32, VI6_FMT_Y_UV_420, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS | VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS, 2, { 8, 16, 0 }, false, true, 2, 2 }, { V4L2_PIX_FMT_NV16M, V4L2_MBUS_FMT_AYUV8_1X32, VI6_FMT_Y_UV_422, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS | VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS, 2, { 8, 16, 0 }, false, false, 2, 1 }, { V4L2_PIX_FMT_NV61M, V4L2_MBUS_FMT_AYUV8_1X32, VI6_FMT_Y_UV_422, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS | VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS, 2, { 8, 16, 0 }, false, true, 2, 1 }, { V4L2_PIX_FMT_YUV420M, V4L2_MBUS_FMT_AYUV8_1X32, VI6_FMT_Y_U_V_420, VI6_RPF_DSWAP_P_LLS | VI6_RPF_DSWAP_P_LWS | VI6_RPF_DSWAP_P_WDS | VI6_RPF_DSWAP_P_BTS, 3, { 8, 8, 8 }, false, false, 2, 2 }, }; /* * vsp1_get_format_info - Retrieve format information for a 4CC * @fourcc: the format 4CC * * Return a pointer to the format information structure corresponding to the * given V4L2 format 4CC, or NULL if no corresponding format can be found. */ static const struct vsp1_format_info *vsp1_get_format_info(u32 fourcc) { unsigned int i; for (i = 0; i < ARRAY_SIZE(vsp1_video_formats); ++i) { const struct vsp1_format_info *info = &vsp1_video_formats[i]; if (info->fourcc == fourcc) return info; } return NULL; } static struct v4l2_subdev * vsp1_video_remote_subdev(struct media_pad *local, u32 *pad) { struct media_pad *remote; remote = media_entity_remote_pad(local); if (remote == NULL || media_entity_type(remote->entity) != MEDIA_ENT_T_V4L2_SUBDEV) return NULL; if (pad) *pad = remote->index; return media_entity_to_v4l2_subdev(remote->entity); } static int vsp1_video_verify_format(struct vsp1_video *video) { struct v4l2_subdev_format fmt; struct v4l2_subdev *subdev; int ret; subdev = vsp1_video_remote_subdev(&video->pad, &fmt.pad); if (subdev == NULL) return -EINVAL; fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE; ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt); if (ret < 0) return ret == -ENOIOCTLCMD ? -EINVAL : ret; if (video->fmtinfo->mbus != fmt.format.code || video->format.height != fmt.format.height || video->format.width != fmt.format.width) return -EINVAL; return 0; } static int __vsp1_video_try_format(struct vsp1_video *video, struct v4l2_pix_format_mplane *pix, const struct vsp1_format_info **fmtinfo) { const struct vsp1_format_info *info; unsigned int width = pix->width; unsigned int height = pix->height; unsigned int i; /* Retrieve format information and select the default format if the * requested format isn't supported. */ info = vsp1_get_format_info(pix->pixelformat); if (info == NULL) info = vsp1_get_format_info(VSP1_VIDEO_DEF_FORMAT); pix->pixelformat = info->fourcc; pix->colorspace = V4L2_COLORSPACE_SRGB; pix->field = V4L2_FIELD_NONE; memset(pix->reserved, 0, sizeof(pix->reserved)); /* Align the width and height for YUV 4:2:2 and 4:2:0 formats. */ width = round_down(width, info->hsub); height = round_down(height, info->vsub); /* Clamp the width and height. */ pix->width = clamp(width, VSP1_VIDEO_MIN_WIDTH, VSP1_VIDEO_MAX_WIDTH); pix->height = clamp(height, VSP1_VIDEO_MIN_HEIGHT, VSP1_VIDEO_MAX_HEIGHT); /* Compute and clamp the stride and image size. While not documented in * the datasheet, strides not aligned to a multiple of 128 bytes result * in image corruption. */ for (i = 0; i < max(info->planes, 2U); ++i) { unsigned int hsub = i > 0 ? info->hsub : 1; unsigned int vsub = i > 0 ? info->vsub : 1; unsigned int align = 128; unsigned int bpl; bpl = clamp_t(unsigned int, pix->plane_fmt[i].bytesperline, pix->width / hsub * info->bpp[i] / 8, round_down(65535U, align)); pix->plane_fmt[i].bytesperline = round_up(bpl, align); pix->plane_fmt[i].sizeimage = pix->plane_fmt[i].bytesperline * pix->height / vsub; } if (info->planes == 3) { /* The second and third planes must have the same stride. */ pix->plane_fmt[2].bytesperline = pix->plane_fmt[1].bytesperline; pix->plane_fmt[2].sizeimage = pix->plane_fmt[1].sizeimage; } pix->num_planes = info->planes; if (fmtinfo) *fmtinfo = info; return 0; } static bool vsp1_video_format_adjust(struct vsp1_video *video, const struct v4l2_pix_format_mplane *format, struct v4l2_pix_format_mplane *adjust) { unsigned int i; *adjust = *format; __vsp1_video_try_format(video, adjust, NULL); if (format->width != adjust->width || format->height != adjust->height || format->pixelformat != adjust->pixelformat || format->num_planes != adjust->num_planes) return false; for (i = 0; i < format->num_planes; ++i) { if (format->plane_fmt[i].bytesperline != adjust->plane_fmt[i].bytesperline) return false; adjust->plane_fmt[i].sizeimage = max(adjust->plane_fmt[i].sizeimage, format->plane_fmt[i].sizeimage); } return true; } /* ----------------------------------------------------------------------------- * Pipeline Management */ static int vsp1_pipeline_validate_branch(struct vsp1_rwpf *input, struct vsp1_rwpf *output) { struct vsp1_entity *entity; unsigned int entities = 0; struct media_pad *pad; bool uds_found = false; pad = media_entity_remote_pad(&input->entity.pads[RWPF_PAD_SOURCE]); while (1) { if (pad == NULL) return -EPIPE; /* We've reached a video node, that shouldn't have happened. */ if (media_entity_type(pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV) return -EPIPE; entity = to_vsp1_entity(media_entity_to_v4l2_subdev(pad->entity)); /* We've reached the WPF, we're done. */ if (entity->type == VSP1_ENTITY_WPF) break; /* Ensure the branch has no loop. */ if (entities & (1 << entity->subdev.entity.id)) return -EPIPE; entities |= 1 << entity->subdev.entity.id; /* UDS can't be chained. */ if (entity->type == VSP1_ENTITY_UDS) { if (uds_found) return -EPIPE; uds_found = true; } /* Follow the source link. The link setup operations ensure * that the output fan-out can't be more than one, there is thus * no need to verify here that only a single source link is * activated. */ pad = &entity->pads[entity->source_pad]; pad = media_entity_remote_pad(pad); } /* The last entity must be the output WPF. */ if (entity != &output->entity) return -EPIPE; return 0; } static int vsp1_pipeline_validate(struct vsp1_pipeline *pipe, struct vsp1_video *video) { struct media_entity_graph graph; struct media_entity *entity = &video->video.entity; struct media_device *mdev = entity->parent; unsigned int i; int ret; mutex_lock(&mdev->graph_mutex); /* Walk the graph to locate the entities and video nodes. */ media_entity_graph_walk_start(&graph, entity); while ((entity = media_entity_graph_walk_next(&graph))) { struct v4l2_subdev *subdev; struct vsp1_rwpf *rwpf; struct vsp1_entity *e; if (media_entity_type(entity) != MEDIA_ENT_T_V4L2_SUBDEV) { pipe->num_video++; continue; } subdev = media_entity_to_v4l2_subdev(entity); e = to_vsp1_entity(subdev); list_add_tail(&e->list_pipe, &pipe->entities); if (e->type == VSP1_ENTITY_RPF) { rwpf = to_rwpf(subdev); pipe->inputs[pipe->num_inputs++] = rwpf; rwpf->video.pipe_index = pipe->num_inputs; } else if (e->type == VSP1_ENTITY_WPF) { rwpf = to_rwpf(subdev); pipe->output = to_rwpf(subdev); rwpf->video.pipe_index = 0; } else if (e->type == VSP1_ENTITY_LIF) { pipe->lif = e; } } mutex_unlock(&mdev->graph_mutex); /* We need one output and at least one input. */ if (pipe->num_inputs == 0 || !pipe->output) { ret = -EPIPE; goto error; } /* Follow links downstream for each input and make sure the graph * contains no loop and that all branches end at the output WPF. */ for (i = 0; i < pipe->num_inputs; ++i) { ret = vsp1_pipeline_validate_branch(pipe->inputs[i], pipe->output); if (ret < 0) goto error; } return 0; error: INIT_LIST_HEAD(&pipe->entities); pipe->buffers_ready = 0; pipe->num_video = 0; pipe->num_inputs = 0; pipe->output = NULL; pipe->lif = NULL; return ret; } static int vsp1_pipeline_init(struct vsp1_pipeline *pipe, struct vsp1_video *video) { int ret; mutex_lock(&pipe->lock); /* If we're the first user validate and initialize the pipeline. */ if (pipe->use_count == 0) { ret = vsp1_pipeline_validate(pipe, video); if (ret < 0) goto done; } pipe->use_count++; ret = 0; done: mutex_unlock(&pipe->lock); return ret; } static void vsp1_pipeline_cleanup(struct vsp1_pipeline *pipe) { mutex_lock(&pipe->lock); /* If we're the last user clean up the pipeline. */ if (--pipe->use_count == 0) { INIT_LIST_HEAD(&pipe->entities); pipe->state = VSP1_PIPELINE_STOPPED; pipe->buffers_ready = 0; pipe->num_video = 0; pipe->num_inputs = 0; pipe->output = NULL; pipe->lif = NULL; } mutex_unlock(&pipe->lock); } static void vsp1_pipeline_run(struct vsp1_pipeline *pipe) { struct vsp1_device *vsp1 = pipe->output->entity.vsp1; vsp1_write(vsp1, VI6_CMD(pipe->output->entity.index), VI6_CMD_STRCMD); pipe->state = VSP1_PIPELINE_RUNNING; pipe->buffers_ready = 0; } static int vsp1_pipeline_stop(struct vsp1_pipeline *pipe) { struct vsp1_entity *entity; unsigned long flags; int ret; spin_lock_irqsave(&pipe->irqlock, flags); pipe->state = VSP1_PIPELINE_STOPPING; spin_unlock_irqrestore(&pipe->irqlock, flags); ret = wait_event_timeout(pipe->wq, pipe->state == VSP1_PIPELINE_STOPPED, msecs_to_jiffies(500)); ret = ret == 0 ? -ETIMEDOUT : 0; list_for_each_entry(entity, &pipe->entities, list_pipe) { if (entity->route) vsp1_write(entity->vsp1, entity->route, VI6_DPR_NODE_UNUSED); v4l2_subdev_call(&entity->subdev, video, s_stream, 0); } return ret; } static bool vsp1_pipeline_ready(struct vsp1_pipeline *pipe) { unsigned int mask; mask = ((1 << pipe->num_inputs) - 1) << 1; if (!pipe->lif) mask |= 1 << 0; return pipe->buffers_ready == mask; } /* * vsp1_video_complete_buffer - Complete the current buffer * @video: the video node * * This function completes the current buffer by filling its sequence number, * time stamp and payload size, and hands it back to the videobuf core. * * When operating in DU output mode (deep pipeline to the DU through the LIF), * the VSP1 needs to constantly supply frames to the display. In that case, if * no other buffer is queued, reuse the one that has just been processed instead * of handing it back to the videobuf core. * * Return the next queued buffer or NULL if the queue is empty. */ static struct vsp1_video_buffer * vsp1_video_complete_buffer(struct vsp1_video *video) { struct vsp1_pipeline *pipe = to_vsp1_pipeline(&video->video.entity); struct vsp1_video_buffer *next = NULL; struct vsp1_video_buffer *done; unsigned long flags; unsigned int i; spin_lock_irqsave(&video->irqlock, flags); if (list_empty(&video->irqqueue)) { spin_unlock_irqrestore(&video->irqlock, flags); return NULL; } done = list_first_entry(&video->irqqueue, struct vsp1_video_buffer, queue); /* In DU output mode reuse the buffer if the list is singular. */ if (pipe->lif && list_is_singular(&video->irqqueue)) { spin_unlock_irqrestore(&video->irqlock, flags); return done; } list_del(&done->queue); if (!list_empty(&video->irqqueue)) next = list_first_entry(&video->irqqueue, struct vsp1_video_buffer, queue); spin_unlock_irqrestore(&video->irqlock, flags); done->buf.v4l2_buf.sequence = video->sequence++; v4l2_get_timestamp(&done->buf.v4l2_buf.timestamp); for (i = 0; i < done->buf.num_planes; ++i) vb2_set_plane_payload(&done->buf, i, done->length[i]); vb2_buffer_done(&done->buf, VB2_BUF_STATE_DONE); return next; } static void vsp1_video_frame_end(struct vsp1_pipeline *pipe, struct vsp1_video *video) { struct vsp1_video_buffer *buf; unsigned long flags; buf = vsp1_video_complete_buffer(video); if (buf == NULL) return; spin_lock_irqsave(&pipe->irqlock, flags); video->ops->queue(video, buf); pipe->buffers_ready |= 1 << video->pipe_index; spin_unlock_irqrestore(&pipe->irqlock, flags); } void vsp1_pipeline_frame_end(struct vsp1_pipeline *pipe) { unsigned long flags; unsigned int i; if (pipe == NULL) return; /* Complete buffers on all video nodes. */ for (i = 0; i < pipe->num_inputs; ++i) vsp1_video_frame_end(pipe, &pipe->inputs[i]->video); if (!pipe->lif) vsp1_video_frame_end(pipe, &pipe->output->video); spin_lock_irqsave(&pipe->irqlock, flags); /* If a stop has been requested, mark the pipeline as stopped and * return. */ if (pipe->state == VSP1_PIPELINE_STOPPING) { pipe->state = VSP1_PIPELINE_STOPPED; wake_up(&pipe->wq); goto done; } /* Restart the pipeline if ready. */ if (vsp1_pipeline_ready(pipe)) vsp1_pipeline_run(pipe); done: spin_unlock_irqrestore(&pipe->irqlock, flags); } /* ----------------------------------------------------------------------------- * videobuf2 Queue Operations */ static int vsp1_video_queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt, unsigned int *nbuffers, unsigned int *nplanes, unsigned int sizes[], void *alloc_ctxs[]) { struct vsp1_video *video = vb2_get_drv_priv(vq); const struct v4l2_pix_format_mplane *format; struct v4l2_pix_format_mplane pix_mp; unsigned int i; if (fmt) { /* Make sure the format is valid and adjust the sizeimage field * if needed. */ if (!vsp1_video_format_adjust(video, &fmt->fmt.pix_mp, &pix_mp)) return -EINVAL; format = &pix_mp; } else { format = &video->format; } *nplanes = format->num_planes; for (i = 0; i < format->num_planes; ++i) { sizes[i] = format->plane_fmt[i].sizeimage; alloc_ctxs[i] = video->alloc_ctx; } return 0; } static int vsp1_video_buffer_prepare(struct vb2_buffer *vb) { struct vsp1_video *video = vb2_get_drv_priv(vb->vb2_queue); struct vsp1_video_buffer *buf = to_vsp1_video_buffer(vb); const struct v4l2_pix_format_mplane *format = &video->format; unsigned int i; if (vb->num_planes < format->num_planes) return -EINVAL; buf->video = video; for (i = 0; i < vb->num_planes; ++i) { buf->addr[i] = vb2_dma_contig_plane_dma_addr(vb, i); buf->length[i] = vb2_plane_size(vb, i); if (buf->length[i] < format->plane_fmt[i].sizeimage) return -EINVAL; } return 0; } static void vsp1_video_buffer_queue(struct vb2_buffer *vb) { struct vsp1_video *video = vb2_get_drv_priv(vb->vb2_queue); struct vsp1_pipeline *pipe = to_vsp1_pipeline(&video->video.entity); struct vsp1_video_buffer *buf = to_vsp1_video_buffer(vb); unsigned long flags; bool empty; spin_lock_irqsave(&video->irqlock, flags); empty = list_empty(&video->irqqueue); list_add_tail(&buf->queue, &video->irqqueue); spin_unlock_irqrestore(&video->irqlock, flags); if (!empty) return; spin_lock_irqsave(&pipe->irqlock, flags); video->ops->queue(video, buf); pipe->buffers_ready |= 1 << video->pipe_index; if (vb2_is_streaming(&video->queue) && vsp1_pipeline_ready(pipe)) vsp1_pipeline_run(pipe); spin_unlock_irqrestore(&pipe->irqlock, flags); } static void vsp1_entity_route_setup(struct vsp1_entity *source) { struct vsp1_entity *sink; if (source->route == 0) return; sink = container_of(source->sink, struct vsp1_entity, subdev.entity); vsp1_write(source->vsp1, source->route, sink->id); } static int vsp1_video_start_streaming(struct vb2_queue *vq, unsigned int count) { struct vsp1_video *video = vb2_get_drv_priv(vq); struct vsp1_pipeline *pipe = to_vsp1_pipeline(&video->video.entity); struct vsp1_entity *entity; unsigned long flags; int ret; mutex_lock(&pipe->lock); if (pipe->stream_count == pipe->num_video - 1) { list_for_each_entry(entity, &pipe->entities, list_pipe) { vsp1_entity_route_setup(entity); ret = v4l2_subdev_call(&entity->subdev, video, s_stream, 1); if (ret < 0) { mutex_unlock(&pipe->lock); return ret; } } } pipe->stream_count++; mutex_unlock(&pipe->lock); spin_lock_irqsave(&pipe->irqlock, flags); if (vsp1_pipeline_ready(pipe)) vsp1_pipeline_run(pipe); spin_unlock_irqrestore(&pipe->irqlock, flags); return 0; } static void vsp1_video_stop_streaming(struct vb2_queue *vq) { struct vsp1_video *video = vb2_get_drv_priv(vq); struct vsp1_pipeline *pipe = to_vsp1_pipeline(&video->video.entity); unsigned long flags; int ret; mutex_lock(&pipe->lock); if (--pipe->stream_count == 0) { /* Stop the pipeline. */ ret = vsp1_pipeline_stop(pipe); if (ret == -ETIMEDOUT) dev_err(video->vsp1->dev, "pipeline stop timeout\n"); } mutex_unlock(&pipe->lock); vsp1_pipeline_cleanup(pipe); media_entity_pipeline_stop(&video->video.entity); /* Remove all buffers from the IRQ queue. */ spin_lock_irqsave(&video->irqlock, flags); INIT_LIST_HEAD(&video->irqqueue); spin_unlock_irqrestore(&video->irqlock, flags); } static struct vb2_ops vsp1_video_queue_qops = { .queue_setup = vsp1_video_queue_setup, .buf_prepare = vsp1_video_buffer_prepare, .buf_queue = vsp1_video_buffer_queue, .wait_prepare = vb2_ops_wait_prepare, .wait_finish = vb2_ops_wait_finish, .start_streaming = vsp1_video_start_streaming, .stop_streaming = vsp1_video_stop_streaming, }; /* ----------------------------------------------------------------------------- * V4L2 ioctls */ static int vsp1_video_querycap(struct file *file, void *fh, struct v4l2_capability *cap) { struct v4l2_fh *vfh = file->private_data; struct vsp1_video *video = to_vsp1_video(vfh->vdev); cap->capabilities = V4L2_CAP_DEVICE_CAPS | V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_CAPTURE_MPLANE | V4L2_CAP_VIDEO_OUTPUT_MPLANE; if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) cap->device_caps = V4L2_CAP_VIDEO_CAPTURE_MPLANE | V4L2_CAP_STREAMING; else cap->device_caps = V4L2_CAP_VIDEO_OUTPUT_MPLANE | V4L2_CAP_STREAMING; strlcpy(cap->driver, "vsp1", sizeof(cap->driver)); strlcpy(cap->card, video->video.name, sizeof(cap->card)); snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s", dev_name(video->vsp1->dev)); return 0; } static int vsp1_video_get_format(struct file *file, void *fh, struct v4l2_format *format) { struct v4l2_fh *vfh = file->private_data; struct vsp1_video *video = to_vsp1_video(vfh->vdev); if (format->type != video->queue.type) return -EINVAL; mutex_lock(&video->lock); format->fmt.pix_mp = video->format; mutex_unlock(&video->lock); return 0; } static int vsp1_video_try_format(struct file *file, void *fh, struct v4l2_format *format) { struct v4l2_fh *vfh = file->private_data; struct vsp1_video *video = to_vsp1_video(vfh->vdev); if (format->type != video->queue.type) return -EINVAL; return __vsp1_video_try_format(video, &format->fmt.pix_mp, NULL); } static int vsp1_video_set_format(struct file *file, void *fh, struct v4l2_format *format) { struct v4l2_fh *vfh = file->private_data; struct vsp1_video *video = to_vsp1_video(vfh->vdev); const struct vsp1_format_info *info; int ret; if (format->type != video->queue.type) return -EINVAL; ret = __vsp1_video_try_format(video, &format->fmt.pix_mp, &info); if (ret < 0) return ret; mutex_lock(&video->lock); if (vb2_is_busy(&video->queue)) { ret = -EBUSY; goto done; } video->format = format->fmt.pix_mp; video->fmtinfo = info; done: mutex_unlock(&video->lock); return ret; } static int vsp1_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type) { struct v4l2_fh *vfh = file->private_data; struct vsp1_video *video = to_vsp1_video(vfh->vdev); struct vsp1_pipeline *pipe; int ret; if (video->queue.owner && video->queue.owner != file->private_data) return -EBUSY; video->sequence = 0; /* Start streaming on the pipeline. No link touching an entity in the * pipeline can be activated or deactivated once streaming is started. * * Use the VSP1 pipeline object embedded in the first video object that * starts streaming. */ pipe = video->video.entity.pipe ? to_vsp1_pipeline(&video->video.entity) : &video->pipe; ret = media_entity_pipeline_start(&video->video.entity, &pipe->pipe); if (ret < 0) return ret; /* Verify that the configured format matches the output of the connected * subdev. */ ret = vsp1_video_verify_format(video); if (ret < 0) goto err_stop; ret = vsp1_pipeline_init(pipe, video); if (ret < 0) goto err_stop; /* Start the queue. */ ret = vb2_streamon(&video->queue, type); if (ret < 0) goto err_cleanup; return 0; err_cleanup: vsp1_pipeline_cleanup(pipe); err_stop: media_entity_pipeline_stop(&video->video.entity); return ret; } static const struct v4l2_ioctl_ops vsp1_video_ioctl_ops = { .vidioc_querycap = vsp1_video_querycap, .vidioc_g_fmt_vid_cap_mplane = vsp1_video_get_format, .vidioc_s_fmt_vid_cap_mplane = vsp1_video_set_format, .vidioc_try_fmt_vid_cap_mplane = vsp1_video_try_format, .vidioc_g_fmt_vid_out_mplane = vsp1_video_get_format, .vidioc_s_fmt_vid_out_mplane = vsp1_video_set_format, .vidioc_try_fmt_vid_out_mplane = vsp1_video_try_format, .vidioc_reqbufs = vb2_ioctl_reqbufs, .vidioc_querybuf = vb2_ioctl_querybuf, .vidioc_qbuf = vb2_ioctl_qbuf, .vidioc_dqbuf = vb2_ioctl_dqbuf, .vidioc_create_bufs = vb2_ioctl_create_bufs, .vidioc_prepare_buf = vb2_ioctl_prepare_buf, .vidioc_streamon = vsp1_video_streamon, .vidioc_streamoff = vb2_ioctl_streamoff, }; /* ----------------------------------------------------------------------------- * V4L2 File Operations */ static int vsp1_video_open(struct file *file) { struct vsp1_video *video = video_drvdata(file); struct v4l2_fh *vfh; int ret = 0; vfh = kzalloc(sizeof(*vfh), GFP_KERNEL); if (vfh == NULL) return -ENOMEM; v4l2_fh_init(vfh, &video->video); v4l2_fh_add(vfh); file->private_data = vfh; if (!vsp1_device_get(video->vsp1)) { ret = -EBUSY; v4l2_fh_del(vfh); kfree(vfh); } return ret; } static int vsp1_video_release(struct file *file) { struct vsp1_video *video = video_drvdata(file); struct v4l2_fh *vfh = file->private_data; mutex_lock(&video->lock); if (video->queue.owner == vfh) { vb2_queue_release(&video->queue); video->queue.owner = NULL; } mutex_unlock(&video->lock); vsp1_device_put(video->vsp1); v4l2_fh_release(file); file->private_data = NULL; return 0; } static struct v4l2_file_operations vsp1_video_fops = { .owner = THIS_MODULE, .unlocked_ioctl = video_ioctl2, .open = vsp1_video_open, .release = vsp1_video_release, .poll = vb2_fop_poll, .mmap = vb2_fop_mmap, }; /* ----------------------------------------------------------------------------- * Initialization and Cleanup */ int vsp1_video_init(struct vsp1_video *video, struct vsp1_entity *rwpf) { const char *direction; int ret; switch (video->type) { case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: direction = "output"; video->pad.flags = MEDIA_PAD_FL_SINK; break; case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: direction = "input"; video->pad.flags = MEDIA_PAD_FL_SOURCE; video->video.vfl_dir = VFL_DIR_TX; break; default: return -EINVAL; } video->rwpf = rwpf; mutex_init(&video->lock); spin_lock_init(&video->irqlock); INIT_LIST_HEAD(&video->irqqueue); mutex_init(&video->pipe.lock); spin_lock_init(&video->pipe.irqlock); INIT_LIST_HEAD(&video->pipe.entities); init_waitqueue_head(&video->pipe.wq); video->pipe.state = VSP1_PIPELINE_STOPPED; /* Initialize the media entity... */ ret = media_entity_init(&video->video.entity, 1, &video->pad, 0); if (ret < 0) return ret; /* ... and the format ... */ video->fmtinfo = vsp1_get_format_info(VSP1_VIDEO_DEF_FORMAT); video->format.pixelformat = video->fmtinfo->fourcc; video->format.colorspace = V4L2_COLORSPACE_SRGB; video->format.field = V4L2_FIELD_NONE; video->format.width = VSP1_VIDEO_DEF_WIDTH; video->format.height = VSP1_VIDEO_DEF_HEIGHT; video->format.num_planes = 1; video->format.plane_fmt[0].bytesperline = video->format.width * video->fmtinfo->bpp[0] / 8; video->format.plane_fmt[0].sizeimage = video->format.plane_fmt[0].bytesperline * video->format.height; /* ... and the video node... */ video->video.v4l2_dev = &video->vsp1->v4l2_dev; video->video.fops = &vsp1_video_fops; snprintf(video->video.name, sizeof(video->video.name), "%s %s", rwpf->subdev.name, direction); video->video.vfl_type = VFL_TYPE_GRABBER; video->video.release = video_device_release_empty; video->video.ioctl_ops = &vsp1_video_ioctl_ops; video_set_drvdata(&video->video, video); /* ... and the buffers queue... */ video->alloc_ctx = vb2_dma_contig_init_ctx(video->vsp1->dev); if (IS_ERR(video->alloc_ctx)) { ret = PTR_ERR(video->alloc_ctx); goto error; } video->queue.type = video->type; video->queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF; video->queue.lock = &video->lock; video->queue.drv_priv = video; video->queue.buf_struct_size = sizeof(struct vsp1_video_buffer); video->queue.ops = &vsp1_video_queue_qops; video->queue.mem_ops = &vb2_dma_contig_memops; video->queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY; ret = vb2_queue_init(&video->queue); if (ret < 0) { dev_err(video->vsp1->dev, "failed to initialize vb2 queue\n"); goto error; } /* ... and register the video device. */ video->video.queue = &video->queue; ret = video_register_device(&video->video, VFL_TYPE_GRABBER, -1); if (ret < 0) { dev_err(video->vsp1->dev, "failed to register video device\n"); goto error; } return 0; error: vb2_dma_contig_cleanup_ctx(video->alloc_ctx); vsp1_video_cleanup(video); return ret; } void vsp1_video_cleanup(struct vsp1_video *video) { if (video_is_registered(&video->video)) video_unregister_device(&video->video); vb2_dma_contig_cleanup_ctx(video->alloc_ctx); media_entity_cleanup(&video->video.entity); }