diff options
Diffstat (limited to 'drivers/media/platform/omap3isp/ispvideo.c')
| -rw-r--r-- | drivers/media/platform/omap3isp/ispvideo.c | 1407 |
1 files changed, 1407 insertions, 0 deletions
diff --git a/drivers/media/platform/omap3isp/ispvideo.c b/drivers/media/platform/omap3isp/ispvideo.c new file mode 100644 index 00000000000..e36bac26476 --- /dev/null +++ b/drivers/media/platform/omap3isp/ispvideo.c @@ -0,0 +1,1407 @@ +/* + * ispvideo.c + * + * TI OMAP3 ISP - Generic video node + * + * Copyright (C) 2009-2010 Nokia Corporation + * + * Contacts: Laurent Pinchart <laurent.pinchart@ideasonboard.com> + * Sakari Ailus <sakari.ailus@iki.fi> + * + * 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. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA + * 02110-1301 USA + */ + +#include <asm/cacheflush.h> +#include <linux/clk.h> +#include <linux/mm.h> +#include <linux/module.h> +#include <linux/pagemap.h> +#include <linux/scatterlist.h> +#include <linux/sched.h> +#include <linux/slab.h> +#include <linux/vmalloc.h> +#include <media/v4l2-dev.h> +#include <media/v4l2-ioctl.h> +#include <media/videobuf2-dma-contig.h> + +#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[] = { + { V4L2_MBUS_FMT_Y8_1X8, V4L2_MBUS_FMT_Y8_1X8, + V4L2_MBUS_FMT_Y8_1X8, V4L2_MBUS_FMT_Y8_1X8, + V4L2_PIX_FMT_GREY, 8, 1, }, + { V4L2_MBUS_FMT_Y10_1X10, V4L2_MBUS_FMT_Y10_1X10, + V4L2_MBUS_FMT_Y10_1X10, V4L2_MBUS_FMT_Y8_1X8, + V4L2_PIX_FMT_Y10, 10, 2, }, + { V4L2_MBUS_FMT_Y12_1X12, V4L2_MBUS_FMT_Y10_1X10, + V4L2_MBUS_FMT_Y12_1X12, V4L2_MBUS_FMT_Y8_1X8, + V4L2_PIX_FMT_Y12, 12, 2, }, + { V4L2_MBUS_FMT_SBGGR8_1X8, V4L2_MBUS_FMT_SBGGR8_1X8, + V4L2_MBUS_FMT_SBGGR8_1X8, V4L2_MBUS_FMT_SBGGR8_1X8, + V4L2_PIX_FMT_SBGGR8, 8, 1, }, + { V4L2_MBUS_FMT_SGBRG8_1X8, V4L2_MBUS_FMT_SGBRG8_1X8, + V4L2_MBUS_FMT_SGBRG8_1X8, V4L2_MBUS_FMT_SGBRG8_1X8, + V4L2_PIX_FMT_SGBRG8, 8, 1, }, + { V4L2_MBUS_FMT_SGRBG8_1X8, V4L2_MBUS_FMT_SGRBG8_1X8, + V4L2_MBUS_FMT_SGRBG8_1X8, V4L2_MBUS_FMT_SGRBG8_1X8, + V4L2_PIX_FMT_SGRBG8, 8, 1, }, + { V4L2_MBUS_FMT_SRGGB8_1X8, V4L2_MBUS_FMT_SRGGB8_1X8, + V4L2_MBUS_FMT_SRGGB8_1X8, V4L2_MBUS_FMT_SRGGB8_1X8, + V4L2_PIX_FMT_SRGGB8, 8, 1, }, + { V4L2_MBUS_FMT_SBGGR10_DPCM8_1X8, V4L2_MBUS_FMT_SBGGR10_DPCM8_1X8, + V4L2_MBUS_FMT_SBGGR10_1X10, 0, + V4L2_PIX_FMT_SBGGR10DPCM8, 8, 1, }, + { V4L2_MBUS_FMT_SGBRG10_DPCM8_1X8, V4L2_MBUS_FMT_SGBRG10_DPCM8_1X8, + V4L2_MBUS_FMT_SGBRG10_1X10, 0, + V4L2_PIX_FMT_SGBRG10DPCM8, 8, 1, }, + { V4L2_MBUS_FMT_SGRBG10_DPCM8_1X8, V4L2_MBUS_FMT_SGRBG10_DPCM8_1X8, + V4L2_MBUS_FMT_SGRBG10_1X10, 0, + V4L2_PIX_FMT_SGRBG10DPCM8, 8, 1, }, + { V4L2_MBUS_FMT_SRGGB10_DPCM8_1X8, V4L2_MBUS_FMT_SRGGB10_DPCM8_1X8, + V4L2_MBUS_FMT_SRGGB10_1X10, 0, + V4L2_PIX_FMT_SRGGB10DPCM8, 8, 1, }, + { V4L2_MBUS_FMT_SBGGR10_1X10, V4L2_MBUS_FMT_SBGGR10_1X10, + V4L2_MBUS_FMT_SBGGR10_1X10, V4L2_MBUS_FMT_SBGGR8_1X8, + V4L2_PIX_FMT_SBGGR10, 10, 2, }, + { V4L2_MBUS_FMT_SGBRG10_1X10, V4L2_MBUS_FMT_SGBRG10_1X10, + V4L2_MBUS_FMT_SGBRG10_1X10, V4L2_MBUS_FMT_SGBRG8_1X8, + V4L2_PIX_FMT_SGBRG10, 10, 2, }, + { V4L2_MBUS_FMT_SGRBG10_1X10, V4L2_MBUS_FMT_SGRBG10_1X10, + V4L2_MBUS_FMT_SGRBG10_1X10, V4L2_MBUS_FMT_SGRBG8_1X8, + V4L2_PIX_FMT_SGRBG10, 10, 2, }, + { V4L2_MBUS_FMT_SRGGB10_1X10, V4L2_MBUS_FMT_SRGGB10_1X10, + V4L2_MBUS_FMT_SRGGB10_1X10, V4L2_MBUS_FMT_SRGGB8_1X8, + V4L2_PIX_FMT_SRGGB10, 10, 2, }, + { V4L2_MBUS_FMT_SBGGR12_1X12, V4L2_MBUS_FMT_SBGGR10_1X10, + V4L2_MBUS_FMT_SBGGR12_1X12, V4L2_MBUS_FMT_SBGGR8_1X8, + V4L2_PIX_FMT_SBGGR12, 12, 2, }, + { V4L2_MBUS_FMT_SGBRG12_1X12, V4L2_MBUS_FMT_SGBRG10_1X10, + V4L2_MBUS_FMT_SGBRG12_1X12, V4L2_MBUS_FMT_SGBRG8_1X8, + V4L2_PIX_FMT_SGBRG12, 12, 2, }, + { V4L2_MBUS_FMT_SGRBG12_1X12, V4L2_MBUS_FMT_SGRBG10_1X10, + V4L2_MBUS_FMT_SGRBG12_1X12, V4L2_MBUS_FMT_SGRBG8_1X8, + V4L2_PIX_FMT_SGRBG12, 12, 2, }, + { V4L2_MBUS_FMT_SRGGB12_1X12, V4L2_MBUS_FMT_SRGGB10_1X10, + V4L2_MBUS_FMT_SRGGB12_1X12, V4L2_MBUS_FMT_SRGGB8_1X8, + V4L2_PIX_FMT_SRGGB12, 12, 2, }, + { V4L2_MBUS_FMT_UYVY8_1X16, V4L2_MBUS_FMT_UYVY8_1X16, + V4L2_MBUS_FMT_UYVY8_1X16, 0, + V4L2_PIX_FMT_UYVY, 16, 2, }, + { V4L2_MBUS_FMT_YUYV8_1X16, V4L2_MBUS_FMT_YUYV8_1X16, + V4L2_MBUS_FMT_YUYV8_1X16, 0, + V4L2_PIX_FMT_YUYV, 16, 2, }, + { V4L2_MBUS_FMT_UYVY8_2X8, V4L2_MBUS_FMT_UYVY8_2X8, + V4L2_MBUS_FMT_UYVY8_2X8, 0, + V4L2_PIX_FMT_UYVY, 8, 2, }, + { V4L2_MBUS_FMT_YUYV8_2X8, V4L2_MBUS_FMT_YUYV8_2X8, + V4L2_MBUS_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(enum v4l2_mbus_pixelcode 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) + return -EINVAL; + + return ret; +} + +/* ----------------------------------------------------------------------------- + * 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); + + /* 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)); + + if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) + cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING; + else + cap->capabilities = 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; + + mutex_lock(&video->mutex); + + /* 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); + + 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); + + 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); +} |