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Diffstat (limited to 'drivers/media/platform/omap3isp/ispvideo.c')
-rw-r--r--drivers/media/platform/omap3isp/ispvideo.c1403
1 files changed, 1403 insertions, 0 deletions
diff --git a/drivers/media/platform/omap3isp/ispvideo.c b/drivers/media/platform/omap3isp/ispvideo.c
new file mode 100644
index 000000000000..3a5085e90024
--- /dev/null
+++ b/drivers/media/platform/omap3isp/ispvideo.c
@@ -0,0 +1,1403 @@
+/*
+ * 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);
+}

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