diff options
Diffstat (limited to 'drivers/media/video/omap3isp/ispvideo.c')
| -rw-r--r-- | drivers/media/video/omap3isp/ispvideo.c | 1403 |
1 files changed, 0 insertions, 1403 deletions
diff --git a/drivers/media/video/omap3isp/ispvideo.c b/drivers/media/video/omap3isp/ispvideo.c deleted file mode 100644 index 3a5085e90024..000000000000 --- a/drivers/media/video/omap3isp/ispvideo.c +++ /dev/null @@ -1,1403 +0,0 @@ -/* - * 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 <plat/iommu.h> -#include <plat/iovmm.h> -#include <plat/omap-pm.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_source(&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; -} - -/* - * Validate a pipeline by checking both ends of all links for format - * discrepancies. - * - * Compute the minimum time per frame value as the maximum of time per frame - * limits reported by every block in the pipeline. - * - * Return 0 if all formats match, or -EPIPE if at least one link is found with - * different formats on its two ends or if the pipeline doesn't start with a - * video source (either a subdev with no input pad, or a non-subdev entity). - */ -static int isp_video_validate_pipeline(struct isp_pipeline *pipe) -{ - struct isp_device *isp = pipe->output->isp; - struct media_pad *pad; - struct v4l2_subdev *subdev; - - subdev = isp_video_remote_subdev(pipe->output, NULL); - if (subdev == NULL) - return -EPIPE; - - while (1) { - /* Retrieve the sink format */ - pad = &subdev->entity.pads[0]; - if (!(pad->flags & MEDIA_PAD_FL_SINK)) - break; - - /* Update the maximum frame rate */ - if (subdev == &isp->isp_res.subdev) - omap3isp_resizer_max_rate(&isp->isp_res, - &pipe->max_rate); - - /* Retrieve the source format. Return an error if no source - * entity can be found, and stop checking the pipeline if the - * source entity isn't a subdev. - */ - pad = media_entity_remote_source(pad); - if (pad == NULL) - return -EPIPE; - - if (media_entity_type(pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV) - break; - - subdev = media_entity_to_v4l2_subdev(pad->entity); - } - - 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; - - mutex_lock(&video->mutex); - - fmt.pad = pad; - fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE; - ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt); - if (ret == -ENOIOCTLCMD) - ret = -EINVAL; - - 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; -} - -/* ----------------------------------------------------------------------------- - * IOMMU management - */ - -#define IOMMU_FLAG (IOVMF_ENDIAN_LITTLE | IOVMF_ELSZ_8) - -/* - * ispmmu_vmap - Wrapper for Virtual memory mapping of a scatter gather list - * @dev: Device pointer specific to the OMAP3 ISP. - * @sglist: Pointer to source Scatter gather list to allocate. - * @sglen: Number of elements of the scatter-gatter list. - * - * Returns a resulting mapped device address by the ISP MMU, or -ENOMEM if - * we ran out of memory. - */ -static dma_addr_t -ispmmu_vmap(struct isp_device *isp, const struct scatterlist *sglist, int sglen) -{ - struct sg_table *sgt; - u32 da; - - sgt = kmalloc(sizeof(*sgt), GFP_KERNEL); - if (sgt == NULL) - return -ENOMEM; - - sgt->sgl = (struct scatterlist *)sglist; - sgt->nents = sglen; - sgt->orig_nents = sglen; - - da = omap_iommu_vmap(isp->domain, isp->dev, 0, sgt, IOMMU_FLAG); - if (IS_ERR_VALUE(da)) - kfree(sgt); - - return da; -} - -/* - * ispmmu_vunmap - Unmap a device address from the ISP MMU - * @dev: Device pointer specific to the OMAP3 ISP. - * @da: Device address generated from a ispmmu_vmap call. - */ -static void ispmmu_vunmap(struct isp_device *isp, dma_addr_t da) -{ - struct sg_table *sgt; - - sgt = omap_iommu_vunmap(isp->domain, isp->dev, (u32)da); - kfree(sgt); -} - -/* ----------------------------------------------------------------------------- - * Video queue operations - */ - -static void isp_video_queue_prepare(struct isp_video_queue *queue, - unsigned int *nbuffers, unsigned int *size) -{ - struct isp_video_fh *vfh = - container_of(queue, struct isp_video_fh, queue); - struct isp_video *video = vfh->video; - - *size = vfh->format.fmt.pix.sizeimage; - if (*size == 0) - return; - - *nbuffers = min(*nbuffers, video->capture_mem / PAGE_ALIGN(*size)); -} - -static void isp_video_buffer_cleanup(struct isp_video_buffer *buf) -{ - struct isp_video_fh *vfh = isp_video_queue_to_isp_video_fh(buf->queue); - struct isp_buffer *buffer = to_isp_buffer(buf); - struct isp_video *video = vfh->video; - - if (buffer->isp_addr) { - ispmmu_vunmap(video->isp, buffer->isp_addr); - buffer->isp_addr = 0; - } -} - -static int isp_video_buffer_prepare(struct isp_video_buffer *buf) -{ - struct isp_video_fh *vfh = isp_video_queue_to_isp_video_fh(buf->queue); - struct isp_buffer *buffer = to_isp_buffer(buf); - struct isp_video *video = vfh->video; - unsigned long addr; - - addr = ispmmu_vmap(video->isp, buf->sglist, buf->sglen); - if (IS_ERR_VALUE(addr)) - return -EIO; - - if (!IS_ALIGNED(addr, 32)) { - dev_dbg(video->isp->dev, "Buffer address must be " - "aligned to 32 bytes boundary.\n"); - ispmmu_vunmap(video->isp, buffer->isp_addr); - return -EINVAL; - } - - buf->vbuf.bytesused = vfh->format.fmt.pix.sizeimage; - buffer->isp_addr = 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 isp_video_buffer *buf) -{ - struct isp_video_fh *vfh = isp_video_queue_to_isp_video_fh(buf->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; - - empty = list_empty(&video->dmaqueue); - list_add_tail(&buffer->buffer.irqlist, &video->dmaqueue); - - 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 isp_video_queue_operations isp_video_queue_ops = { - .queue_prepare = &isp_video_queue_prepare, - .buffer_prepare = &isp_video_buffer_prepare, - .buffer_queue = &isp_video_buffer_queue, - .buffer_cleanup = &isp_video_buffer_cleanup, -}; - -/* - * 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, - * field count and state fields before waking up its completion handler. - * - * For capture video nodes the buffer state is set to ISP_BUF_STATE_DONE if no - * error has been flagged in the pipeline, or to ISP_BUF_STATE_ERROR otherwise. - * For video output nodes the buffer state is always set to ISP_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); - struct isp_video_queue *queue = video->queue; - enum isp_pipeline_state state; - struct isp_video_buffer *buf; - unsigned long flags; - struct timespec ts; - - spin_lock_irqsave(&queue->irqlock, flags); - if (WARN_ON(list_empty(&video->dmaqueue))) { - spin_unlock_irqrestore(&queue->irqlock, flags); - return NULL; - } - - buf = list_first_entry(&video->dmaqueue, struct isp_video_buffer, - irqlist); - list_del(&buf->irqlist); - spin_unlock_irqrestore(&queue->irqlock, flags); - - ktime_get_ts(&ts); - buf->vbuf.timestamp.tv_sec = ts.tv_sec; - buf->vbuf.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->vbuf.sequence = atomic_inc_return(&pipe->frame_number); - else - buf->vbuf.sequence = atomic_read(&pipe->frame_number); - - /* Report pipeline errors to userspace on the capture device side. */ - if (queue->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && pipe->error) { - buf->state = ISP_BUF_STATE_ERROR; - pipe->error = false; - } else { - buf->state = ISP_BUF_STATE_DONE; - } - - wake_up(&buf->wait); - - if (list_empty(&video->dmaqueue)) { - if (queue->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 (queue->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && pipe->input != NULL) { - spin_lock_irqsave(&pipe->lock, flags); - pipe->state &= ~ISP_PIPELINE_STREAM; - spin_unlock_irqrestore(&pipe->lock, flags); - } - - buf = list_first_entry(&video->dmaqueue, struct isp_video_buffer, - irqlist); - buf->state = ISP_BUF_STATE_ACTIVE; - return to_isp_buffer(buf); -} - -/* - * 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) - omap3isp_video_queue_discard_done(video->queue); - - if (!list_empty(&video->dmaqueue)) { - buf = list_first_entry(&video->dmaqueue, - struct isp_buffer, 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 ? -EINVAL : 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 ? -EINVAL : 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 ? -EINVAL : 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, 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 ? -EINVAL : 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); - - return omap3isp_video_queue_reqbufs(&vfh->queue, rb); -} - -static int -isp_video_querybuf(struct file *file, void *fh, struct v4l2_buffer *b) -{ - struct isp_video_fh *vfh = to_isp_video_fh(fh); - - return omap3isp_video_queue_querybuf(&vfh->queue, b); -} - -static int -isp_video_qbuf(struct file *file, void *fh, struct v4l2_buffer *b) -{ - struct isp_video_fh *vfh = to_isp_video_fh(fh); - - return omap3isp_video_queue_qbuf(&vfh->queue, b); -} - -static int -isp_video_dqbuf(struct file *file, void *fh, struct v4l2_buffer *b) -{ - struct isp_video_fh *vfh = to_isp_video_fh(fh); - - return omap3isp_video_queue_dqbuf(&vfh->queue, b, - file->f_flags & O_NONBLOCK); -} - -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 = 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_source(&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 ret; - } - - 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); - - if (video->streaming) { - mutex_unlock(&video->stream_lock); - return -EBUSY; - } - - /* 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; - - /* Validate the pipeline and update its state. */ - ret = isp_video_validate_pipeline(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); - - ret = omap3isp_video_queue_streamon(&vfh->queue); - 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->queue->irqlock, flags); - if (list_empty(&video->dmaqueue)) - video->dmaqueue_flags |= ISP_VIDEO_DMAQUEUE_UNDERRUN; - spin_unlock_irqrestore(&video->queue->irqlock, flags); - } - - video->streaming = 1; - - mutex_unlock(&video->stream_lock); - return 0; - -err_set_stream: - omap3isp_video_queue_streamoff(&vfh->queue); -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(&vfh->queue.lock); - streaming = vfh->queue.streaming; - mutex_unlock(&vfh->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_queue_streamoff(&vfh->queue); - video->queue = NULL; - video->streaming = 0; - - 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; - 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; - } - - omap3isp_video_queue_init(&handle->queue, video->type, - &isp_video_queue_ops, video->isp->dev, - sizeof(struct isp_buffer)); - - 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(&handle->queue.lock); - omap3isp_video_queue_cleanup(&handle->queue); - mutex_unlock(&handle->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_queue *queue = &vfh->queue; - - return omap3isp_video_queue_poll(queue, file, wait); -} - -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); - - return omap3isp_video_queue_mmap(&vfh->queue, vma); -} - -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; - break; - case V4L2_BUF_TYPE_VIDEO_OUTPUT: - direction = "input"; - video->pad.flags = MEDIA_PAD_FL_SOURCE; - break; - - default: - return -EINVAL; - } - - ret = media_entity_init(&video->video.entity, 1, &video->pad, 0); - if (ret < 0) - return ret; - - mutex_init(&video->mutex); - atomic_set(&video->active, 0); - - spin_lock_init(&video->pipe.lock); - mutex_init(&video->stream_lock); - - /* 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) -{ - media_entity_cleanup(&video->video.entity); - 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) - printk(KERN_ERR "%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); -} |