/* * ispvideo.c * * TI OMAP3 ISP - Generic video node * * Copyright (C) 2009-2010 Nokia Corporation * * Contacts: Laurent Pinchart * Sakari Ailus * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #include #include #include #include #include #include #include #include #include #include #include #include #include "ispvideo.h" #include "isp.h" /* ----------------------------------------------------------------------------- * Helper functions */ /* * NOTE: When adding new media bus codes, always remember to add * corresponding in-memory formats to the table below!!! */ static struct isp_format_info formats[] = { { MEDIA_BUS_FMT_Y8_1X8, MEDIA_BUS_FMT_Y8_1X8, MEDIA_BUS_FMT_Y8_1X8, MEDIA_BUS_FMT_Y8_1X8, V4L2_PIX_FMT_GREY, 8, 1, }, { MEDIA_BUS_FMT_Y10_1X10, MEDIA_BUS_FMT_Y10_1X10, MEDIA_BUS_FMT_Y10_1X10, MEDIA_BUS_FMT_Y8_1X8, V4L2_PIX_FMT_Y10, 10, 2, }, { MEDIA_BUS_FMT_Y12_1X12, MEDIA_BUS_FMT_Y10_1X10, MEDIA_BUS_FMT_Y12_1X12, MEDIA_BUS_FMT_Y8_1X8, V4L2_PIX_FMT_Y12, 12, 2, }, { MEDIA_BUS_FMT_SBGGR8_1X8, MEDIA_BUS_FMT_SBGGR8_1X8, MEDIA_BUS_FMT_SBGGR8_1X8, MEDIA_BUS_FMT_SBGGR8_1X8, V4L2_PIX_FMT_SBGGR8, 8, 1, }, { MEDIA_BUS_FMT_SGBRG8_1X8, MEDIA_BUS_FMT_SGBRG8_1X8, MEDIA_BUS_FMT_SGBRG8_1X8, MEDIA_BUS_FMT_SGBRG8_1X8, V4L2_PIX_FMT_SGBRG8, 8, 1, }, { MEDIA_BUS_FMT_SGRBG8_1X8, MEDIA_BUS_FMT_SGRBG8_1X8, MEDIA_BUS_FMT_SGRBG8_1X8, MEDIA_BUS_FMT_SGRBG8_1X8, V4L2_PIX_FMT_SGRBG8, 8, 1, }, { MEDIA_BUS_FMT_SRGGB8_1X8, MEDIA_BUS_FMT_SRGGB8_1X8, MEDIA_BUS_FMT_SRGGB8_1X8, MEDIA_BUS_FMT_SRGGB8_1X8, V4L2_PIX_FMT_SRGGB8, 8, 1, }, { MEDIA_BUS_FMT_SBGGR10_DPCM8_1X8, MEDIA_BUS_FMT_SBGGR10_DPCM8_1X8, MEDIA_BUS_FMT_SBGGR10_1X10, 0, V4L2_PIX_FMT_SBGGR10DPCM8, 8, 1, }, { MEDIA_BUS_FMT_SGBRG10_DPCM8_1X8, MEDIA_BUS_FMT_SGBRG10_DPCM8_1X8, MEDIA_BUS_FMT_SGBRG10_1X10, 0, V4L2_PIX_FMT_SGBRG10DPCM8, 8, 1, }, { MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8, MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8, MEDIA_BUS_FMT_SGRBG10_1X10, 0, V4L2_PIX_FMT_SGRBG10DPCM8, 8, 1, }, { MEDIA_BUS_FMT_SRGGB10_DPCM8_1X8, MEDIA_BUS_FMT_SRGGB10_DPCM8_1X8, MEDIA_BUS_FMT_SRGGB10_1X10, 0, V4L2_PIX_FMT_SRGGB10DPCM8, 8, 1, }, { MEDIA_BUS_FMT_SBGGR10_1X10, MEDIA_BUS_FMT_SBGGR10_1X10, MEDIA_BUS_FMT_SBGGR10_1X10, MEDIA_BUS_FMT_SBGGR8_1X8, V4L2_PIX_FMT_SBGGR10, 10, 2, }, { MEDIA_BUS_FMT_SGBRG10_1X10, MEDIA_BUS_FMT_SGBRG10_1X10, MEDIA_BUS_FMT_SGBRG10_1X10, MEDIA_BUS_FMT_SGBRG8_1X8, V4L2_PIX_FMT_SGBRG10, 10, 2, }, { MEDIA_BUS_FMT_SGRBG10_1X10, MEDIA_BUS_FMT_SGRBG10_1X10, MEDIA_BUS_FMT_SGRBG10_1X10, MEDIA_BUS_FMT_SGRBG8_1X8, V4L2_PIX_FMT_SGRBG10, 10, 2, }, { MEDIA_BUS_FMT_SRGGB10_1X10, MEDIA_BUS_FMT_SRGGB10_1X10, MEDIA_BUS_FMT_SRGGB10_1X10, MEDIA_BUS_FMT_SRGGB8_1X8, V4L2_PIX_FMT_SRGGB10, 10, 2, }, { MEDIA_BUS_FMT_SBGGR12_1X12, MEDIA_BUS_FMT_SBGGR10_1X10, MEDIA_BUS_FMT_SBGGR12_1X12, MEDIA_BUS_FMT_SBGGR8_1X8, V4L2_PIX_FMT_SBGGR12, 12, 2, }, { MEDIA_BUS_FMT_SGBRG12_1X12, MEDIA_BUS_FMT_SGBRG10_1X10, MEDIA_BUS_FMT_SGBRG12_1X12, MEDIA_BUS_FMT_SGBRG8_1X8, V4L2_PIX_FMT_SGBRG12, 12, 2, }, { MEDIA_BUS_FMT_SGRBG12_1X12, MEDIA_BUS_FMT_SGRBG10_1X10, MEDIA_BUS_FMT_SGRBG12_1X12, MEDIA_BUS_FMT_SGRBG8_1X8, V4L2_PIX_FMT_SGRBG12, 12, 2, }, { MEDIA_BUS_FMT_SRGGB12_1X12, MEDIA_BUS_FMT_SRGGB10_1X10, MEDIA_BUS_FMT_SRGGB12_1X12, MEDIA_BUS_FMT_SRGGB8_1X8, V4L2_PIX_FMT_SRGGB12, 12, 2, }, { MEDIA_BUS_FMT_UYVY8_1X16, MEDIA_BUS_FMT_UYVY8_1X16, MEDIA_BUS_FMT_UYVY8_1X16, 0, V4L2_PIX_FMT_UYVY, 16, 2, }, { MEDIA_BUS_FMT_YUYV8_1X16, MEDIA_BUS_FMT_YUYV8_1X16, MEDIA_BUS_FMT_YUYV8_1X16, 0, V4L2_PIX_FMT_YUYV, 16, 2, }, { MEDIA_BUS_FMT_UYVY8_2X8, MEDIA_BUS_FMT_UYVY8_2X8, MEDIA_BUS_FMT_UYVY8_2X8, 0, V4L2_PIX_FMT_UYVY, 8, 2, }, { MEDIA_BUS_FMT_YUYV8_2X8, MEDIA_BUS_FMT_YUYV8_2X8, MEDIA_BUS_FMT_YUYV8_2X8, 0, V4L2_PIX_FMT_YUYV, 8, 2, }, /* Empty entry to catch the unsupported pixel code (0) used by the CCDC * module and avoid NULL pointer dereferences. */ { 0, } }; const struct isp_format_info *omap3isp_video_format_info(u32 code) { unsigned int i; for (i = 0; i < ARRAY_SIZE(formats); ++i) { if (formats[i].code == code) return &formats[i]; } return NULL; } /* * isp_video_mbus_to_pix - Convert v4l2_mbus_framefmt to v4l2_pix_format * @video: ISP video instance * @mbus: v4l2_mbus_framefmt format (input) * @pix: v4l2_pix_format format (output) * * Fill the output pix structure with information from the input mbus format. * The bytesperline and sizeimage fields are computed from the requested bytes * per line value in the pix format and information from the video instance. * * Return the number of padding bytes at end of line. */ static unsigned int isp_video_mbus_to_pix(const struct isp_video *video, const struct v4l2_mbus_framefmt *mbus, struct v4l2_pix_format *pix) { unsigned int bpl = pix->bytesperline; unsigned int min_bpl; unsigned int i; memset(pix, 0, sizeof(*pix)); pix->width = mbus->width; pix->height = mbus->height; for (i = 0; i < ARRAY_SIZE(formats); ++i) { if (formats[i].code == mbus->code) break; } if (WARN_ON(i == ARRAY_SIZE(formats))) return 0; min_bpl = pix->width * formats[i].bpp; /* Clamp the requested bytes per line value. If the maximum bytes per * line value is zero, the module doesn't support user configurable line * sizes. Override the requested value with the minimum in that case. */ if (video->bpl_max) bpl = clamp(bpl, min_bpl, video->bpl_max); else bpl = min_bpl; if (!video->bpl_zero_padding || bpl != min_bpl) bpl = ALIGN(bpl, video->bpl_alignment); pix->pixelformat = formats[i].pixelformat; pix->bytesperline = bpl; pix->sizeimage = pix->bytesperline * pix->height; pix->colorspace = mbus->colorspace; pix->field = mbus->field; return bpl - min_bpl; } static void isp_video_pix_to_mbus(const struct v4l2_pix_format *pix, struct v4l2_mbus_framefmt *mbus) { unsigned int i; memset(mbus, 0, sizeof(*mbus)); mbus->width = pix->width; mbus->height = pix->height; /* Skip the last format in the loop so that it will be selected if no * match is found. */ for (i = 0; i < ARRAY_SIZE(formats) - 1; ++i) { if (formats[i].pixelformat == pix->pixelformat) break; } mbus->code = formats[i].code; mbus->colorspace = pix->colorspace; mbus->field = pix->field; } static struct v4l2_subdev * isp_video_remote_subdev(struct isp_video *video, u32 *pad) { struct media_pad *remote; remote = media_entity_remote_pad(&video->pad); 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); } /* Return a pointer to the ISP video instance at the far end of the pipeline. */ static int isp_video_get_graph_data(struct isp_video *video, struct isp_pipeline *pipe) { struct media_entity_graph graph; struct media_entity *entity = &video->video.entity; struct media_device *mdev = entity->parent; struct isp_video *far_end = NULL; mutex_lock(&mdev->graph_mutex); media_entity_graph_walk_start(&graph, entity); while ((entity = media_entity_graph_walk_next(&graph))) { struct isp_video *__video; pipe->entities |= 1 << entity->id; if (far_end != NULL) continue; if (entity == &video->video.entity) continue; if (media_entity_type(entity) != MEDIA_ENT_T_DEVNODE) continue; __video = to_isp_video(media_entity_to_video_device(entity)); if (__video->type != video->type) far_end = __video; } mutex_unlock(&mdev->graph_mutex); if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) { pipe->input = far_end; pipe->output = video; } else { if (far_end == NULL) return -EPIPE; pipe->input = video; pipe->output = far_end; } return 0; } static int __isp_video_get_format(struct isp_video *video, struct v4l2_format *format) { struct v4l2_subdev_format fmt; struct v4l2_subdev *subdev; u32 pad; int ret; subdev = isp_video_remote_subdev(video, &pad); if (subdev == NULL) return -EINVAL; fmt.pad = pad; fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE; mutex_lock(&video->mutex); ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt); mutex_unlock(&video->mutex); if (ret) return ret; format->type = video->type; return isp_video_mbus_to_pix(video, &fmt.format, &format->fmt.pix); } static int isp_video_check_format(struct isp_video *video, struct isp_video_fh *vfh) { struct v4l2_format format; int ret; memcpy(&format, &vfh->format, sizeof(format)); ret = __isp_video_get_format(video, &format); if (ret < 0) return ret; if (vfh->format.fmt.pix.pixelformat != format.fmt.pix.pixelformat || vfh->format.fmt.pix.height != format.fmt.pix.height || vfh->format.fmt.pix.width != format.fmt.pix.width || vfh->format.fmt.pix.bytesperline != format.fmt.pix.bytesperline || vfh->format.fmt.pix.sizeimage != format.fmt.pix.sizeimage || vfh->format.fmt.pix.field != format.fmt.pix.field) return -EINVAL; return 0; } /* ----------------------------------------------------------------------------- * Video queue operations */ static int isp_video_queue_setup(struct vb2_queue *queue, const struct v4l2_format *fmt, unsigned int *count, unsigned int *num_planes, unsigned int sizes[], void *alloc_ctxs[]) { struct isp_video_fh *vfh = vb2_get_drv_priv(queue); struct isp_video *video = vfh->video; *num_planes = 1; sizes[0] = vfh->format.fmt.pix.sizeimage; if (sizes[0] == 0) return -EINVAL; alloc_ctxs[0] = video->alloc_ctx; *count = min(*count, video->capture_mem / PAGE_ALIGN(sizes[0])); return 0; } static int isp_video_buffer_prepare(struct vb2_buffer *buf) { struct isp_video_fh *vfh = vb2_get_drv_priv(buf->vb2_queue); struct isp_buffer *buffer = to_isp_buffer(buf); struct isp_video *video = vfh->video; dma_addr_t addr; /* Refuse to prepare the buffer is the video node has registered an * error. We don't need to take any lock here as the operation is * inherently racy. The authoritative check will be performed in the * queue handler, which can't return an error, this check is just a best * effort to notify userspace as early as possible. */ if (unlikely(video->error)) return -EIO; addr = vb2_dma_contig_plane_dma_addr(buf, 0); if (!IS_ALIGNED(addr, 32)) { dev_dbg(video->isp->dev, "Buffer address must be aligned to 32 bytes boundary.\n"); return -EINVAL; } vb2_set_plane_payload(&buffer->vb, 0, vfh->format.fmt.pix.sizeimage); buffer->dma = addr; return 0; } /* * isp_video_buffer_queue - Add buffer to streaming queue * @buf: Video buffer * * In memory-to-memory mode, start streaming on the pipeline if buffers are * queued on both the input and the output, if the pipeline isn't already busy. * If the pipeline is busy, it will be restarted in the output module interrupt * handler. */ static void isp_video_buffer_queue(struct vb2_buffer *buf) { struct isp_video_fh *vfh = vb2_get_drv_priv(buf->vb2_queue); struct isp_buffer *buffer = to_isp_buffer(buf); struct isp_video *video = vfh->video; struct isp_pipeline *pipe = to_isp_pipeline(&video->video.entity); enum isp_pipeline_state state; unsigned long flags; unsigned int empty; unsigned int start; spin_lock_irqsave(&video->irqlock, flags); if (unlikely(video->error)) { vb2_buffer_done(&buffer->vb, VB2_BUF_STATE_ERROR); spin_unlock_irqrestore(&video->irqlock, flags); return; } empty = list_empty(&video->dmaqueue); list_add_tail(&buffer->irqlist, &video->dmaqueue); spin_unlock_irqrestore(&video->irqlock, flags); if (empty) { if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) state = ISP_PIPELINE_QUEUE_OUTPUT; else state = ISP_PIPELINE_QUEUE_INPUT; spin_lock_irqsave(&pipe->lock, flags); pipe->state |= state; video->ops->queue(video, buffer); video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_QUEUED; start = isp_pipeline_ready(pipe); if (start) pipe->state |= ISP_PIPELINE_STREAM; spin_unlock_irqrestore(&pipe->lock, flags); if (start) omap3isp_pipeline_set_stream(pipe, ISP_PIPELINE_STREAM_SINGLESHOT); } } static const struct vb2_ops isp_video_queue_ops = { .queue_setup = isp_video_queue_setup, .buf_prepare = isp_video_buffer_prepare, .buf_queue = isp_video_buffer_queue, }; /* * omap3isp_video_buffer_next - Complete the current buffer and return the next * @video: ISP video object * * Remove the current video buffer from the DMA queue and fill its timestamp and * field count before handing it back to videobuf2. * * For capture video nodes the buffer state is set to VB2_BUF_STATE_DONE if no * error has been flagged in the pipeline, or to VB2_BUF_STATE_ERROR otherwise. * For video output nodes the buffer state is always set to VB2_BUF_STATE_DONE. * * The DMA queue is expected to contain at least one buffer. * * Return a pointer to the next buffer in the DMA queue, or NULL if the queue is * empty. */ struct isp_buffer *omap3isp_video_buffer_next(struct isp_video *video) { struct isp_pipeline *pipe = to_isp_pipeline(&video->video.entity); enum isp_pipeline_state state; struct isp_buffer *buf; unsigned long flags; struct timespec ts; spin_lock_irqsave(&video->irqlock, flags); if (WARN_ON(list_empty(&video->dmaqueue))) { spin_unlock_irqrestore(&video->irqlock, flags); return NULL; } buf = list_first_entry(&video->dmaqueue, struct isp_buffer, irqlist); list_del(&buf->irqlist); spin_unlock_irqrestore(&video->irqlock, flags); ktime_get_ts(&ts); buf->vb.v4l2_buf.timestamp.tv_sec = ts.tv_sec; buf->vb.v4l2_buf.timestamp.tv_usec = ts.tv_nsec / NSEC_PER_USEC; /* Do frame number propagation only if this is the output video node. * Frame number either comes from the CSI receivers or it gets * incremented here if H3A is not active. * Note: There is no guarantee that the output buffer will finish * first, so the input number might lag behind by 1 in some cases. */ if (video == pipe->output && !pipe->do_propagation) buf->vb.v4l2_buf.sequence = atomic_inc_return(&pipe->frame_number); else buf->vb.v4l2_buf.sequence = atomic_read(&pipe->frame_number); if (pipe->field != V4L2_FIELD_NONE) buf->vb.v4l2_buf.sequence /= 2; buf->vb.v4l2_buf.field = pipe->field; /* Report pipeline errors to userspace on the capture device side. */ if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && pipe->error) { state = VB2_BUF_STATE_ERROR; pipe->error = false; } else { state = VB2_BUF_STATE_DONE; } vb2_buffer_done(&buf->vb, state); spin_lock_irqsave(&video->irqlock, flags); if (list_empty(&video->dmaqueue)) { spin_unlock_irqrestore(&video->irqlock, flags); if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) state = ISP_PIPELINE_QUEUE_OUTPUT | ISP_PIPELINE_STREAM; else state = ISP_PIPELINE_QUEUE_INPUT | ISP_PIPELINE_STREAM; spin_lock_irqsave(&pipe->lock, flags); pipe->state &= ~state; if (video->pipe.stream_state == ISP_PIPELINE_STREAM_CONTINUOUS) video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_UNDERRUN; spin_unlock_irqrestore(&pipe->lock, flags); return NULL; } if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && pipe->input != NULL) { spin_lock(&pipe->lock); pipe->state &= ~ISP_PIPELINE_STREAM; spin_unlock(&pipe->lock); } buf = list_first_entry(&video->dmaqueue, struct isp_buffer, irqlist); buf->vb.state = VB2_BUF_STATE_ACTIVE; spin_unlock_irqrestore(&video->irqlock, flags); return buf; } /* * omap3isp_video_cancel_stream - Cancel stream on a video node * @video: ISP video object * * Cancelling a stream mark all buffers on the video node as erroneous and makes * sure no new buffer can be queued. */ void omap3isp_video_cancel_stream(struct isp_video *video) { unsigned long flags; spin_lock_irqsave(&video->irqlock, flags); while (!list_empty(&video->dmaqueue)) { struct isp_buffer *buf; buf = list_first_entry(&video->dmaqueue, struct isp_buffer, irqlist); list_del(&buf->irqlist); vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR); } video->error = true; spin_unlock_irqrestore(&video->irqlock, flags); } /* * omap3isp_video_resume - Perform resume operation on the buffers * @video: ISP video object * @continuous: Pipeline is in single shot mode if 0 or continuous mode otherwise * * This function is intended to be used on suspend/resume scenario. It * requests video queue layer to discard buffers marked as DONE if it's in * continuous mode and requests ISP modules to queue again the ACTIVE buffer * if there's any. */ void omap3isp_video_resume(struct isp_video *video, int continuous) { struct isp_buffer *buf = NULL; if (continuous && video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) { mutex_lock(&video->queue_lock); vb2_discard_done(video->queue); mutex_unlock(&video->queue_lock); } if (!list_empty(&video->dmaqueue)) { buf = list_first_entry(&video->dmaqueue, struct isp_buffer, irqlist); video->ops->queue(video, buf); video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_QUEUED; } else { if (continuous) video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_UNDERRUN; } } /* ----------------------------------------------------------------------------- * V4L2 ioctls */ static int isp_video_querycap(struct file *file, void *fh, struct v4l2_capability *cap) { struct isp_video *video = video_drvdata(file); strlcpy(cap->driver, ISP_VIDEO_DRIVER_NAME, sizeof(cap->driver)); strlcpy(cap->card, video->video.name, sizeof(cap->card)); strlcpy(cap->bus_info, "media", sizeof(cap->bus_info)); cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING | V4L2_CAP_DEVICE_CAPS; if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING; else cap->device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING; return 0; } static int isp_video_get_format(struct file *file, void *fh, struct v4l2_format *format) { struct isp_video_fh *vfh = to_isp_video_fh(fh); struct isp_video *video = video_drvdata(file); if (format->type != video->type) return -EINVAL; mutex_lock(&video->mutex); *format = vfh->format; mutex_unlock(&video->mutex); return 0; } static int isp_video_set_format(struct file *file, void *fh, struct v4l2_format *format) { struct isp_video_fh *vfh = to_isp_video_fh(fh); struct isp_video *video = video_drvdata(file); struct v4l2_mbus_framefmt fmt; if (format->type != video->type) return -EINVAL; /* Replace unsupported field orders with sane defaults. */ switch (format->fmt.pix.field) { case V4L2_FIELD_NONE: /* Progressive is supported everywhere. */ break; case V4L2_FIELD_ALTERNATE: /* ALTERNATE is not supported on output nodes. */ if (video->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) format->fmt.pix.field = V4L2_FIELD_NONE; break; case V4L2_FIELD_INTERLACED: /* The ISP has no concept of video standard, select the * top-bottom order when the unqualified interlaced order is * requested. */ format->fmt.pix.field = V4L2_FIELD_INTERLACED_TB; /* Fall-through */ case V4L2_FIELD_INTERLACED_TB: case V4L2_FIELD_INTERLACED_BT: /* Interlaced orders are only supported at the CCDC output. */ if (video != &video->isp->isp_ccdc.video_out) format->fmt.pix.field = V4L2_FIELD_NONE; break; case V4L2_FIELD_TOP: case V4L2_FIELD_BOTTOM: case V4L2_FIELD_SEQ_TB: case V4L2_FIELD_SEQ_BT: default: /* All other field orders are currently unsupported, default to * progressive. */ format->fmt.pix.field = V4L2_FIELD_NONE; break; } /* Fill the bytesperline and sizeimage fields by converting to media bus * format and back to pixel format. */ isp_video_pix_to_mbus(&format->fmt.pix, &fmt); isp_video_mbus_to_pix(video, &fmt, &format->fmt.pix); mutex_lock(&video->mutex); vfh->format = *format; mutex_unlock(&video->mutex); return 0; } static int isp_video_try_format(struct file *file, void *fh, struct v4l2_format *format) { struct isp_video *video = video_drvdata(file); struct v4l2_subdev_format fmt; struct v4l2_subdev *subdev; u32 pad; int ret; if (format->type != video->type) return -EINVAL; subdev = isp_video_remote_subdev(video, &pad); if (subdev == NULL) return -EINVAL; isp_video_pix_to_mbus(&format->fmt.pix, &fmt.format); fmt.pad = pad; fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE; ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt); if (ret) return ret == -ENOIOCTLCMD ? -ENOTTY : ret; isp_video_mbus_to_pix(video, &fmt.format, &format->fmt.pix); return 0; } static int isp_video_cropcap(struct file *file, void *fh, struct v4l2_cropcap *cropcap) { struct isp_video *video = video_drvdata(file); struct v4l2_subdev *subdev; int ret; subdev = isp_video_remote_subdev(video, NULL); if (subdev == NULL) return -EINVAL; mutex_lock(&video->mutex); ret = v4l2_subdev_call(subdev, video, cropcap, cropcap); mutex_unlock(&video->mutex); return ret == -ENOIOCTLCMD ? -ENOTTY : ret; } static int isp_video_get_crop(struct file *file, void *fh, struct v4l2_crop *crop) { struct isp_video *video = video_drvdata(file); struct v4l2_subdev_format format; struct v4l2_subdev *subdev; u32 pad; int ret; subdev = isp_video_remote_subdev(video, &pad); if (subdev == NULL) return -EINVAL; /* Try the get crop operation first and fallback to get format if not * implemented. */ ret = v4l2_subdev_call(subdev, video, g_crop, crop); if (ret != -ENOIOCTLCMD) return ret; format.pad = pad; format.which = V4L2_SUBDEV_FORMAT_ACTIVE; ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &format); if (ret < 0) return ret == -ENOIOCTLCMD ? -ENOTTY : ret; crop->c.left = 0; crop->c.top = 0; crop->c.width = format.format.width; crop->c.height = format.format.height; return 0; } static int isp_video_set_crop(struct file *file, void *fh, const struct v4l2_crop *crop) { struct isp_video *video = video_drvdata(file); struct v4l2_subdev *subdev; int ret; subdev = isp_video_remote_subdev(video, NULL); if (subdev == NULL) return -EINVAL; mutex_lock(&video->mutex); ret = v4l2_subdev_call(subdev, video, s_crop, crop); mutex_unlock(&video->mutex); return ret == -ENOIOCTLCMD ? -ENOTTY : ret; } static int isp_video_get_param(struct file *file, void *fh, struct v4l2_streamparm *a) { struct isp_video_fh *vfh = to_isp_video_fh(fh); struct isp_video *video = video_drvdata(file); if (video->type != V4L2_BUF_TYPE_VIDEO_OUTPUT || video->type != a->type) return -EINVAL; memset(a, 0, sizeof(*a)); a->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; a->parm.output.capability = V4L2_CAP_TIMEPERFRAME; a->parm.output.timeperframe = vfh->timeperframe; return 0; } static int isp_video_set_param(struct file *file, void *fh, struct v4l2_streamparm *a) { struct isp_video_fh *vfh = to_isp_video_fh(fh); struct isp_video *video = video_drvdata(file); if (video->type != V4L2_BUF_TYPE_VIDEO_OUTPUT || video->type != a->type) return -EINVAL; if (a->parm.output.timeperframe.denominator == 0) a->parm.output.timeperframe.denominator = 1; vfh->timeperframe = a->parm.output.timeperframe; return 0; } static int isp_video_reqbufs(struct file *file, void *fh, struct v4l2_requestbuffers *rb) { struct isp_video_fh *vfh = to_isp_video_fh(fh); struct isp_video *video = video_drvdata(file); int ret; mutex_lock(&video->queue_lock); ret = vb2_reqbufs(&vfh->queue, rb); mutex_unlock(&video->queue_lock); return ret; } static int isp_video_querybuf(struct file *file, void *fh, struct v4l2_buffer *b) { struct isp_video_fh *vfh = to_isp_video_fh(fh); struct isp_video *video = video_drvdata(file); int ret; mutex_lock(&video->queue_lock); ret = vb2_querybuf(&vfh->queue, b); mutex_unlock(&video->queue_lock); return ret; } static int isp_video_qbuf(struct file *file, void *fh, struct v4l2_buffer *b) { struct isp_video_fh *vfh = to_isp_video_fh(fh); struct isp_video *video = video_drvdata(file); int ret; mutex_lock(&video->queue_lock); ret = vb2_qbuf(&vfh->queue, b); mutex_unlock(&video->queue_lock); return ret; } static int isp_video_dqbuf(struct file *file, void *fh, struct v4l2_buffer *b) { struct isp_video_fh *vfh = to_isp_video_fh(fh); struct isp_video *video = video_drvdata(file); int ret; mutex_lock(&video->queue_lock); ret = vb2_dqbuf(&vfh->queue, b, file->f_flags & O_NONBLOCK); mutex_unlock(&video->queue_lock); return ret; } static int isp_video_check_external_subdevs(struct isp_video *video, struct isp_pipeline *pipe) { struct isp_device *isp = video->isp; struct media_entity *ents[] = { &isp->isp_csi2a.subdev.entity, &isp->isp_csi2c.subdev.entity, &isp->isp_ccp2.subdev.entity, &isp->isp_ccdc.subdev.entity }; struct media_pad *source_pad; struct media_entity *source = NULL; struct media_entity *sink; struct v4l2_subdev_format fmt; struct v4l2_ext_controls ctrls; struct v4l2_ext_control ctrl; unsigned int i; int ret; /* Memory-to-memory pipelines have no external subdev. */ if (pipe->input != NULL) return 0; for (i = 0; i < ARRAY_SIZE(ents); i++) { /* Is the entity part of the pipeline? */ if (!(pipe->entities & (1 << ents[i]->id))) continue; /* ISP entities have always sink pad == 0. Find source. */ source_pad = media_entity_remote_pad(&ents[i]->pads[0]); if (source_pad == NULL) continue; source = source_pad->entity; sink = ents[i]; break; } if (!source) { dev_warn(isp->dev, "can't find source, failing now\n"); return -EINVAL; } if (media_entity_type(source) != MEDIA_ENT_T_V4L2_SUBDEV) return 0; pipe->external = media_entity_to_v4l2_subdev(source); fmt.pad = source_pad->index; fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE; ret = v4l2_subdev_call(media_entity_to_v4l2_subdev(sink), pad, get_fmt, NULL, &fmt); if (unlikely(ret < 0)) { dev_warn(isp->dev, "get_fmt returned null!\n"); return ret; } pipe->external_width = omap3isp_video_format_info(fmt.format.code)->width; memset(&ctrls, 0, sizeof(ctrls)); memset(&ctrl, 0, sizeof(ctrl)); ctrl.id = V4L2_CID_PIXEL_RATE; ctrls.count = 1; ctrls.controls = &ctrl; ret = v4l2_g_ext_ctrls(pipe->external->ctrl_handler, &ctrls); if (ret < 0) { dev_warn(isp->dev, "no pixel rate control in subdev %s\n", pipe->external->name); return ret; } pipe->external_rate = ctrl.value64; if (pipe->entities & (1 << isp->isp_ccdc.subdev.entity.id)) { unsigned int rate = UINT_MAX; /* * Check that maximum allowed CCDC pixel rate isn't * exceeded by the pixel rate. */ omap3isp_ccdc_max_rate(&isp->isp_ccdc, &rate); if (pipe->external_rate > rate) return -ENOSPC; } return 0; } /* * Stream management * * Every ISP pipeline has a single input and a single output. The input can be * either a sensor or a video node. The output is always a video node. * * As every pipeline has an output video node, the ISP video objects at the * pipeline output stores the pipeline state. It tracks the streaming state of * both the input and output, as well as the availability of buffers. * * In sensor-to-memory mode, frames are always available at the pipeline input. * Starting the sensor usually requires I2C transfers and must be done in * interruptible context. The pipeline is started and stopped synchronously * to the stream on/off commands. All modules in the pipeline will get their * subdev set stream handler called. The module at the end of the pipeline must * delay starting the hardware until buffers are available at its output. * * In memory-to-memory mode, starting/stopping the stream requires * synchronization between the input and output. ISP modules can't be stopped * in the middle of a frame, and at least some of the modules seem to become * busy as soon as they're started, even if they don't receive a frame start * event. For that reason frames need to be processed in single-shot mode. The * driver needs to wait until a frame is completely processed and written to * memory before restarting the pipeline for the next frame. Pipelined * processing might be possible but requires more testing. * * Stream start must be delayed until buffers are available at both the input * and output. The pipeline must be started in the videobuf queue callback with * the buffers queue spinlock held. The modules subdev set stream operation must * not sleep. */ static int isp_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type) { struct isp_video_fh *vfh = to_isp_video_fh(fh); struct isp_video *video = video_drvdata(file); enum isp_pipeline_state state; struct isp_pipeline *pipe; unsigned long flags; int ret; if (type != video->type) return -EINVAL; mutex_lock(&video->stream_lock); /* Start streaming on the pipeline. No link touching an entity in the * pipeline can be activated or deactivated once streaming is started. */ pipe = video->video.entity.pipe ? to_isp_pipeline(&video->video.entity) : &video->pipe; pipe->entities = 0; if (video->isp->pdata->set_constraints) video->isp->pdata->set_constraints(video->isp, true); pipe->l3_ick = clk_get_rate(video->isp->clock[ISP_CLK_L3_ICK]); pipe->max_rate = pipe->l3_ick; ret = media_entity_pipeline_start(&video->video.entity, &pipe->pipe); if (ret < 0) goto err_pipeline_start; /* Verify that the currently configured format matches the output of * the connected subdev. */ ret = isp_video_check_format(video, vfh); if (ret < 0) goto err_check_format; video->bpl_padding = ret; video->bpl_value = vfh->format.fmt.pix.bytesperline; ret = isp_video_get_graph_data(video, pipe); if (ret < 0) goto err_check_format; if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) state = ISP_PIPELINE_STREAM_OUTPUT | ISP_PIPELINE_IDLE_OUTPUT; else state = ISP_PIPELINE_STREAM_INPUT | ISP_PIPELINE_IDLE_INPUT; ret = isp_video_check_external_subdevs(video, pipe); if (ret < 0) goto err_check_format; pipe->error = false; spin_lock_irqsave(&pipe->lock, flags); pipe->state &= ~ISP_PIPELINE_STREAM; pipe->state |= state; spin_unlock_irqrestore(&pipe->lock, flags); /* Set the maximum time per frame as the value requested by userspace. * This is a soft limit that can be overridden if the hardware doesn't * support the request limit. */ if (video->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) pipe->max_timeperframe = vfh->timeperframe; video->queue = &vfh->queue; INIT_LIST_HEAD(&video->dmaqueue); atomic_set(&pipe->frame_number, -1); pipe->field = vfh->format.fmt.pix.field; mutex_lock(&video->queue_lock); ret = vb2_streamon(&vfh->queue, type); mutex_unlock(&video->queue_lock); if (ret < 0) goto err_check_format; /* In sensor-to-memory mode, the stream can be started synchronously * to the stream on command. In memory-to-memory mode, it will be * started when buffers are queued on both the input and output. */ if (pipe->input == NULL) { ret = omap3isp_pipeline_set_stream(pipe, ISP_PIPELINE_STREAM_CONTINUOUS); if (ret < 0) goto err_set_stream; spin_lock_irqsave(&video->irqlock, flags); if (list_empty(&video->dmaqueue)) video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_UNDERRUN; spin_unlock_irqrestore(&video->irqlock, flags); } mutex_unlock(&video->stream_lock); return 0; err_set_stream: mutex_lock(&video->queue_lock); vb2_streamoff(&vfh->queue, type); mutex_unlock(&video->queue_lock); err_check_format: media_entity_pipeline_stop(&video->video.entity); err_pipeline_start: if (video->isp->pdata->set_constraints) video->isp->pdata->set_constraints(video->isp, false); /* The DMA queue must be emptied here, otherwise CCDC interrupts that * will get triggered the next time the CCDC is powered up will try to * access buffers that might have been freed but still present in the * DMA queue. This can easily get triggered if the above * omap3isp_pipeline_set_stream() call fails on a system with a * free-running sensor. */ INIT_LIST_HEAD(&video->dmaqueue); video->queue = NULL; mutex_unlock(&video->stream_lock); return ret; } static int isp_video_streamoff(struct file *file, void *fh, enum v4l2_buf_type type) { struct isp_video_fh *vfh = to_isp_video_fh(fh); struct isp_video *video = video_drvdata(file); struct isp_pipeline *pipe = to_isp_pipeline(&video->video.entity); enum isp_pipeline_state state; unsigned int streaming; unsigned long flags; if (type != video->type) return -EINVAL; mutex_lock(&video->stream_lock); /* Make sure we're not streaming yet. */ mutex_lock(&video->queue_lock); streaming = vb2_is_streaming(&vfh->queue); mutex_unlock(&video->queue_lock); if (!streaming) goto done; /* Update the pipeline state. */ if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) state = ISP_PIPELINE_STREAM_OUTPUT | ISP_PIPELINE_QUEUE_OUTPUT; else state = ISP_PIPELINE_STREAM_INPUT | ISP_PIPELINE_QUEUE_INPUT; spin_lock_irqsave(&pipe->lock, flags); pipe->state &= ~state; spin_unlock_irqrestore(&pipe->lock, flags); /* Stop the stream. */ omap3isp_pipeline_set_stream(pipe, ISP_PIPELINE_STREAM_STOPPED); omap3isp_video_cancel_stream(video); mutex_lock(&video->queue_lock); vb2_streamoff(&vfh->queue, type); mutex_unlock(&video->queue_lock); video->queue = NULL; video->error = false; if (video->isp->pdata->set_constraints) video->isp->pdata->set_constraints(video->isp, false); media_entity_pipeline_stop(&video->video.entity); done: mutex_unlock(&video->stream_lock); return 0; } static int isp_video_enum_input(struct file *file, void *fh, struct v4l2_input *input) { if (input->index > 0) return -EINVAL; strlcpy(input->name, "camera", sizeof(input->name)); input->type = V4L2_INPUT_TYPE_CAMERA; return 0; } static int isp_video_g_input(struct file *file, void *fh, unsigned int *input) { *input = 0; return 0; } static int isp_video_s_input(struct file *file, void *fh, unsigned int input) { return input == 0 ? 0 : -EINVAL; } static const struct v4l2_ioctl_ops isp_video_ioctl_ops = { .vidioc_querycap = isp_video_querycap, .vidioc_g_fmt_vid_cap = isp_video_get_format, .vidioc_s_fmt_vid_cap = isp_video_set_format, .vidioc_try_fmt_vid_cap = isp_video_try_format, .vidioc_g_fmt_vid_out = isp_video_get_format, .vidioc_s_fmt_vid_out = isp_video_set_format, .vidioc_try_fmt_vid_out = isp_video_try_format, .vidioc_cropcap = isp_video_cropcap, .vidioc_g_crop = isp_video_get_crop, .vidioc_s_crop = isp_video_set_crop, .vidioc_g_parm = isp_video_get_param, .vidioc_s_parm = isp_video_set_param, .vidioc_reqbufs = isp_video_reqbufs, .vidioc_querybuf = isp_video_querybuf, .vidioc_qbuf = isp_video_qbuf, .vidioc_dqbuf = isp_video_dqbuf, .vidioc_streamon = isp_video_streamon, .vidioc_streamoff = isp_video_streamoff, .vidioc_enum_input = isp_video_enum_input, .vidioc_g_input = isp_video_g_input, .vidioc_s_input = isp_video_s_input, }; /* ----------------------------------------------------------------------------- * V4L2 file operations */ static int isp_video_open(struct file *file) { struct isp_video *video = video_drvdata(file); struct isp_video_fh *handle; struct vb2_queue *queue; int ret = 0; handle = kzalloc(sizeof(*handle), GFP_KERNEL); if (handle == NULL) return -ENOMEM; v4l2_fh_init(&handle->vfh, &video->video); v4l2_fh_add(&handle->vfh); /* If this is the first user, initialise the pipeline. */ if (omap3isp_get(video->isp) == NULL) { ret = -EBUSY; goto done; } ret = omap3isp_pipeline_pm_use(&video->video.entity, 1); if (ret < 0) { omap3isp_put(video->isp); goto done; } queue = &handle->queue; queue->type = video->type; queue->io_modes = VB2_MMAP | VB2_USERPTR; queue->drv_priv = handle; queue->ops = &isp_video_queue_ops; queue->mem_ops = &vb2_dma_contig_memops; queue->buf_struct_size = sizeof(struct isp_buffer); queue->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; ret = vb2_queue_init(&handle->queue); if (ret < 0) { omap3isp_put(video->isp); goto done; } memset(&handle->format, 0, sizeof(handle->format)); handle->format.type = video->type; handle->timeperframe.denominator = 1; handle->video = video; file->private_data = &handle->vfh; done: if (ret < 0) { v4l2_fh_del(&handle->vfh); kfree(handle); } return ret; } static int isp_video_release(struct file *file) { struct isp_video *video = video_drvdata(file); struct v4l2_fh *vfh = file->private_data; struct isp_video_fh *handle = to_isp_video_fh(vfh); /* Disable streaming and free the buffers queue resources. */ isp_video_streamoff(file, vfh, video->type); mutex_lock(&video->queue_lock); vb2_queue_release(&handle->queue); mutex_unlock(&video->queue_lock); omap3isp_pipeline_pm_use(&video->video.entity, 0); /* Release the file handle. */ v4l2_fh_del(vfh); kfree(handle); file->private_data = NULL; omap3isp_put(video->isp); return 0; } static unsigned int isp_video_poll(struct file *file, poll_table *wait) { struct isp_video_fh *vfh = to_isp_video_fh(file->private_data); struct isp_video *video = video_drvdata(file); int ret; mutex_lock(&video->queue_lock); ret = vb2_poll(&vfh->queue, file, wait); mutex_unlock(&video->queue_lock); return ret; } static int isp_video_mmap(struct file *file, struct vm_area_struct *vma) { struct isp_video_fh *vfh = to_isp_video_fh(file->private_data); struct isp_video *video = video_drvdata(file); int ret; mutex_lock(&video->queue_lock); ret = vb2_mmap(&vfh->queue, vma); mutex_unlock(&video->queue_lock); return ret; } static struct v4l2_file_operations isp_video_fops = { .owner = THIS_MODULE, .unlocked_ioctl = video_ioctl2, .open = isp_video_open, .release = isp_video_release, .poll = isp_video_poll, .mmap = isp_video_mmap, }; /* ----------------------------------------------------------------------------- * ISP video core */ static const struct isp_video_operations isp_video_dummy_ops = { }; int omap3isp_video_init(struct isp_video *video, const char *name) { const char *direction; int ret; switch (video->type) { case V4L2_BUF_TYPE_VIDEO_CAPTURE: direction = "output"; video->pad.flags = MEDIA_PAD_FL_SINK | MEDIA_PAD_FL_MUST_CONNECT; break; case V4L2_BUF_TYPE_VIDEO_OUTPUT: direction = "input"; video->pad.flags = MEDIA_PAD_FL_SOURCE | MEDIA_PAD_FL_MUST_CONNECT; video->video.vfl_dir = VFL_DIR_TX; break; default: return -EINVAL; } video->alloc_ctx = vb2_dma_contig_init_ctx(video->isp->dev); if (IS_ERR(video->alloc_ctx)) return PTR_ERR(video->alloc_ctx); ret = media_entity_init(&video->video.entity, 1, &video->pad, 0); if (ret < 0) { vb2_dma_contig_cleanup_ctx(video->alloc_ctx); return ret; } mutex_init(&video->mutex); atomic_set(&video->active, 0); spin_lock_init(&video->pipe.lock); mutex_init(&video->stream_lock); mutex_init(&video->queue_lock); spin_lock_init(&video->irqlock); /* Initialize the video device. */ if (video->ops == NULL) video->ops = &isp_video_dummy_ops; video->video.fops = &isp_video_fops; snprintf(video->video.name, sizeof(video->video.name), "OMAP3 ISP %s %s", name, direction); video->video.vfl_type = VFL_TYPE_GRABBER; video->video.release = video_device_release_empty; video->video.ioctl_ops = &isp_video_ioctl_ops; video->pipe.stream_state = ISP_PIPELINE_STREAM_STOPPED; video_set_drvdata(&video->video, video); return 0; } void omap3isp_video_cleanup(struct isp_video *video) { vb2_dma_contig_cleanup_ctx(video->alloc_ctx); media_entity_cleanup(&video->video.entity); mutex_destroy(&video->queue_lock); mutex_destroy(&video->stream_lock); mutex_destroy(&video->mutex); } int omap3isp_video_register(struct isp_video *video, struct v4l2_device *vdev) { int ret; video->video.v4l2_dev = vdev; ret = video_register_device(&video->video, VFL_TYPE_GRABBER, -1); if (ret < 0) dev_err(video->isp->dev, "%s: could not register video device (%d)\n", __func__, ret); return ret; } void omap3isp_video_unregister(struct isp_video *video) { if (video_is_registered(&video->video)) video_unregister_device(&video->video); }