| /* |
| * 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/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 |
| */ |
| |
| 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, }, |
| { 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, }, |
| { 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, }, |
| { 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, }, |
| { 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, }, |
| { 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, }, |
| { 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, }, |
| { V4L2_MBUS_FMT_SGRBG10_DPCM8_1X8, V4L2_MBUS_FMT_SGRBG10_DPCM8_1X8, |
| V4L2_MBUS_FMT_SGRBG10_1X10, 0, |
| V4L2_PIX_FMT_SGRBG10DPCM8, 8, }, |
| { 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, }, |
| { 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, }, |
| { 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, }, |
| { 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, }, |
| { 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, }, |
| { 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, }, |
| { 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, }, |
| { 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, }, |
| { V4L2_MBUS_FMT_UYVY8_1X16, V4L2_MBUS_FMT_UYVY8_1X16, |
| V4L2_MBUS_FMT_UYVY8_1X16, 0, |
| V4L2_PIX_FMT_UYVY, 16, }, |
| { V4L2_MBUS_FMT_YUYV8_1X16, V4L2_MBUS_FMT_YUYV8_1X16, |
| V4L2_MBUS_FMT_YUYV8_1X16, 0, |
| V4L2_PIX_FMT_YUYV, 16, }, |
| }; |
| |
| 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; |
| } |
| |
| /* |
| * Decide whether desired output pixel code can be obtained with |
| * the lane shifter by shifting the input pixel code. |
| * @in: input pixelcode to shifter |
| * @out: output pixelcode from shifter |
| * @additional_shift: # of bits the sensor's LSB is offset from CAMEXT[0] |
| * |
| * return true if the combination is possible |
| * return false otherwise |
| */ |
| static bool isp_video_is_shiftable(enum v4l2_mbus_pixelcode in, |
| enum v4l2_mbus_pixelcode out, |
| unsigned int additional_shift) |
| { |
| const struct isp_format_info *in_info, *out_info; |
| |
| if (in == out) |
| return true; |
| |
| in_info = omap3isp_video_format_info(in); |
| out_info = omap3isp_video_format_info(out); |
| |
| if ((in_info->flavor == 0) || (out_info->flavor == 0)) |
| return false; |
| |
| if (in_info->flavor != out_info->flavor) |
| return false; |
| |
| return in_info->bpp - out_info->bpp + additional_shift <= 6; |
| } |
| |
| /* |
| * 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 * ALIGN(formats[i].bpp, 8) / 8; |
| |
| /* 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; |
| |
| for (i = 0; i < ARRAY_SIZE(formats); ++i) { |
| if (formats[i].pixelformat == pix->pixelformat) |
| break; |
| } |
| |
| if (WARN_ON(i == ARRAY_SIZE(formats))) |
| return; |
| |
| 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 struct isp_video * |
| isp_video_far_end(struct isp_video *video) |
| { |
| 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))) { |
| if (entity == &video->video.entity) |
| continue; |
| |
| if (media_entity_type(entity) != MEDIA_ENT_T_DEVNODE) |
| continue; |
| |
| far_end = to_isp_video(media_entity_to_video_device(entity)); |
| if (far_end->type != video->type) |
| break; |
| |
| far_end = NULL; |
| } |
| |
| mutex_unlock(&mdev->graph_mutex); |
| return far_end; |
| } |
| |
| /* |
| * 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. |
| */ |
| static int isp_video_validate_pipeline(struct isp_pipeline *pipe) |
| { |
| struct isp_device *isp = pipe->output->isp; |
| struct v4l2_subdev_format fmt_source; |
| struct v4l2_subdev_format fmt_sink; |
| struct media_pad *pad; |
| struct v4l2_subdev *subdev; |
| int ret; |
| |
| pipe->max_rate = pipe->l3_ick; |
| |
| subdev = isp_video_remote_subdev(pipe->output, NULL); |
| if (subdev == NULL) |
| return -EPIPE; |
| |
| while (1) { |
| unsigned int shifter_link; |
| /* Retrieve the sink format */ |
| pad = &subdev->entity.pads[0]; |
| if (!(pad->flags & MEDIA_PAD_FL_SINK)) |
| break; |
| |
| fmt_sink.pad = pad->index; |
| fmt_sink.which = V4L2_SUBDEV_FORMAT_ACTIVE; |
| ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt_sink); |
| if (ret < 0 && ret != -ENOIOCTLCMD) |
| return -EPIPE; |
| |
| /* Update the maximum frame rate */ |
| if (subdev == &isp->isp_res.subdev) |
| omap3isp_resizer_max_rate(&isp->isp_res, |
| &pipe->max_rate); |
| |
| /* Check ccdc maximum data rate when data comes from sensor |
| * TODO: Include ccdc rate in pipe->max_rate and compare the |
| * total pipe rate with the input data rate from sensor. |
| */ |
| if (subdev == &isp->isp_ccdc.subdev && pipe->input == NULL) { |
| unsigned int rate = UINT_MAX; |
| |
| omap3isp_ccdc_max_rate(&isp->isp_ccdc, &rate); |
| if (isp->isp_ccdc.vpcfg.pixelclk > rate) |
| return -ENOSPC; |
| } |
| |
| /* If sink pad is on CCDC, the link has the lane shifter |
| * in the middle of it. */ |
| shifter_link = subdev == &isp->isp_ccdc.subdev; |
| |
| /* Retrieve the source format */ |
| pad = media_entity_remote_source(pad); |
| if (pad == NULL || |
| media_entity_type(pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV) |
| break; |
| |
| subdev = media_entity_to_v4l2_subdev(pad->entity); |
| |
| fmt_source.pad = pad->index; |
| fmt_source.which = V4L2_SUBDEV_FORMAT_ACTIVE; |
| ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt_source); |
| if (ret < 0 && ret != -ENOIOCTLCMD) |
| return -EPIPE; |
| |
| /* Check if the two ends match */ |
| if (fmt_source.format.width != fmt_sink.format.width || |
| fmt_source.format.height != fmt_sink.format.height) |
| return -EPIPE; |
| |
| if (shifter_link) { |
| unsigned int parallel_shift = 0; |
| if (isp->isp_ccdc.input == CCDC_INPUT_PARALLEL) { |
| struct isp_parallel_platform_data *pdata = |
| &((struct isp_v4l2_subdevs_group *) |
| subdev->host_priv)->bus.parallel; |
| parallel_shift = pdata->data_lane_shift * 2; |
| } |
| if (!isp_video_is_shiftable(fmt_source.format.code, |
| fmt_sink.format.code, |
| parallel_shift)) |
| return -EPIPE; |
| } else if (fmt_source.format.code != fmt_sink.format.code) |
| return -EPIPE; |
| } |
| |
| 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 = iommu_vmap(isp->iommu, 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 = iommu_vunmap(isp->iommu, (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 |
| * @error: Whether an error occurred during capture |
| * |
| * Remove the current video buffer from the DMA queue and fill its timestamp, |
| * field count and state fields before waking up its completion handler. |
| * |
| * The buffer state is set to VIDEOBUF_DONE if no error occurred (@error is 0) |
| * or VIDEOBUF_ERROR otherwise (@error is non-zero). |
| * |
| * 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, |
| unsigned int error) |
| { |
| 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); |
| |
| buf->state = error ? ISP_BUF_STATE_ERROR : 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); |
| } |
| |
| /* |
| * 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; |
| struct isp_video *far_end; |
| 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; |
| media_entity_pipeline_start(&video->video.entity, &pipe->pipe); |
| |
| /* Verify that the currently configured format matches the output of |
| * the connected subdev. |
| */ |
| ret = isp_video_check_format(video, vfh); |
| if (ret < 0) |
| goto error; |
| |
| video->bpl_padding = ret; |
| video->bpl_value = vfh->format.fmt.pix.bytesperline; |
| |
| /* Find the ISP video node connected at the far end of the pipeline and |
| * update the pipeline. |
| */ |
| far_end = isp_video_far_end(video); |
| |
| if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) { |
| state = ISP_PIPELINE_STREAM_OUTPUT | ISP_PIPELINE_IDLE_OUTPUT; |
| pipe->input = far_end; |
| pipe->output = video; |
| } else { |
| if (far_end == NULL) { |
| ret = -EPIPE; |
| goto error; |
| } |
| |
| state = ISP_PIPELINE_STREAM_INPUT | ISP_PIPELINE_IDLE_INPUT; |
| pipe->input = video; |
| pipe->output = far_end; |
| } |
| |
| 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]); |
| |
| /* Validate the pipeline and update its state. */ |
| ret = isp_video_validate_pipeline(pipe); |
| if (ret < 0) |
| goto error; |
| |
| 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 error; |
| |
| /* 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 error; |
| 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); |
| } |
| |
| error: |
| if (ret < 0) { |
| omap3isp_video_queue_streamoff(&vfh->queue); |
| if (video->isp->pdata->set_constraints) |
| video->isp->pdata->set_constraints(video->isp, false); |
| media_entity_pipeline_stop(&video->video.entity); |
| video->queue = NULL; |
| } |
| |
| if (!ret) |
| video->streaming = 1; |
| |
| 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; |
| } |
| |
| 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)) { |
| media_entity_cleanup(&video->video.entity); |
| video_unregister_device(&video->video); |
| } |
| } |