diff options
author | Sergio Aguirre <sergio.a.aguirre@gmail.com> | 2011-01-24 21:48:19 +0300 |
---|---|---|
committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2013-12-03 23:25:50 +0400 |
commit | fc96d58c10162d476138f135b5e9080fec41b478 (patch) | |
tree | eae144cec4941ac0e1b5fe989ca7fb16ca7ed7fd | |
parent | 59f0ad8076816d13f7cba80d2b178ff5ab787e2e (diff) | |
download | linux-fc96d58c10162d476138f135b5e9080fec41b478.tar.xz |
[media] v4l: omap4iss: Add support for OMAP4 camera interface - Video devices
This adds a very simplistic driver to utilize the CSI2A interface inside
the ISS subsystem in OMAP4, and dump the data to memory.
Check Documentation/video4linux/omap4_camera.txt for details.
This commit adds video devices support.
Signed-off-by: Sergio Aguirre <sergio.a.aguirre@gmail.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
-rw-r--r-- | drivers/staging/media/omap4iss/iss_video.c | 1129 | ||||
-rw-r--r-- | drivers/staging/media/omap4iss/iss_video.h | 201 |
2 files changed, 1330 insertions, 0 deletions
diff --git a/drivers/staging/media/omap4iss/iss_video.c b/drivers/staging/media/omap4iss/iss_video.c new file mode 100644 index 000000000000..31f1b8805711 --- /dev/null +++ b/drivers/staging/media/omap4iss/iss_video.c @@ -0,0 +1,1129 @@ +/* + * TI OMAP4 ISS V4L2 Driver - Generic video node + * + * Copyright (C) 2012 Texas Instruments, Inc. + * + * Author: Sergio Aguirre <sergio.a.aguirre@gmail.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#include <asm/cacheflush.h> +#include <linux/clk.h> +#include <linux/mm.h> +#include <linux/pagemap.h> +#include <linux/sched.h> +#include <linux/slab.h> +#include <linux/vmalloc.h> +#include <linux/module.h> +#include <media/v4l2-dev.h> +#include <media/v4l2-ioctl.h> + +#include "iss_video.h" +#include "iss.h" + + +/* ----------------------------------------------------------------------------- + * Helper functions + */ + +static struct iss_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, }, + { V4L2_MBUS_FMT_YUYV8_1_5X8, V4L2_MBUS_FMT_YUYV8_1_5X8, + V4L2_MBUS_FMT_YUYV8_1_5X8, 0, + V4L2_PIX_FMT_NV12, 8, }, +}; + +const struct iss_format_info * +omap4iss_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; +} + +/* + * iss_video_mbus_to_pix - Convert v4l2_mbus_framefmt to v4l2_pix_format + * @video: ISS 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 iss_video_mbus_to_pix(const struct iss_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; + + /* 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].code == mbus->code) + break; + } + + 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; + + /* FIXME: Special case for NV12! We should make this nicer... */ + if (pix->pixelformat == V4L2_PIX_FMT_NV12) + pix->sizeimage += (pix->bytesperline * pix->height) / 2; + + return bpl - min_bpl; +} + +static void iss_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 * +iss_video_remote_subdev(struct iss_video *video, u32 *pad) +{ + struct media_pad *remote; + + remote = media_entity_remote_pad(&video->pad); + + if (remote == NULL || + media_entity_type(remote->entity) != MEDIA_ENT_T_V4L2_SUBDEV) + return NULL; + + if (pad) + *pad = remote->index; + + return media_entity_to_v4l2_subdev(remote->entity); +} + +/* Return a pointer to the ISS video instance at the far end of the pipeline. */ +static struct iss_video * +iss_video_far_end(struct iss_video *video) +{ + struct media_entity_graph graph; + struct media_entity *entity = &video->video.entity; + struct media_device *mdev = entity->parent; + struct iss_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_iss_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; +} + +static int +__iss_video_get_format(struct iss_video *video, struct v4l2_format *format) +{ + struct v4l2_subdev_format fmt; + struct v4l2_subdev *subdev; + u32 pad; + int ret; + + subdev = iss_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 iss_video_mbus_to_pix(video, &fmt.format, &format->fmt.pix); +} + +static int +iss_video_check_format(struct iss_video *video, struct iss_video_fh *vfh) +{ + struct v4l2_format format; + int ret; + + memcpy(&format, &vfh->format, sizeof(format)); + ret = __iss_video_get_format(video, &format); + if (ret < 0) + return ret; + + if (vfh->format.fmt.pix.pixelformat != format.fmt.pix.pixelformat || + vfh->format.fmt.pix.height != format.fmt.pix.height || + vfh->format.fmt.pix.width != format.fmt.pix.width || + vfh->format.fmt.pix.bytesperline != format.fmt.pix.bytesperline || + vfh->format.fmt.pix.sizeimage != format.fmt.pix.sizeimage) + return -EINVAL; + + return ret; +} + +/* ----------------------------------------------------------------------------- + * Video queue operations + */ + +static int iss_video_queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt, + unsigned int *count, unsigned int *num_planes, + unsigned int sizes[], void *alloc_ctxs[]) +{ + struct iss_video_fh *vfh = vb2_get_drv_priv(vq); + struct iss_video *video = vfh->video; + + /* Revisit multi-planar support for NV12 */ + *num_planes = 1; + + sizes[0] = vfh->format.fmt.pix.sizeimage; + if (sizes[0] == 0) + return -EINVAL; + + alloc_ctxs[0] = video->alloc_ctx; + + *count = min(*count, (unsigned int)(video->capture_mem / PAGE_ALIGN(sizes[0]))); + + return 0; +} + +static void iss_video_buf_cleanup(struct vb2_buffer *vb) +{ + struct iss_buffer *buffer = container_of(vb, struct iss_buffer, vb); + + if (buffer->iss_addr) + buffer->iss_addr = 0; +} + +static int iss_video_buf_prepare(struct vb2_buffer *vb) +{ + struct iss_video_fh *vfh = vb2_get_drv_priv(vb->vb2_queue); + struct iss_buffer *buffer = container_of(vb, struct iss_buffer, vb); + struct iss_video *video = vfh->video; + unsigned long size = vfh->format.fmt.pix.sizeimage; + dma_addr_t addr; + + if (vb2_plane_size(vb, 0) < size) + return -ENOBUFS; + + addr = vb2_dma_contig_plane_dma_addr(vb, 0); + if (!IS_ALIGNED(addr, 32)) { + dev_dbg(video->iss->dev, "Buffer address must be " + "aligned to 32 bytes boundary.\n"); + return -EINVAL; + } + + vb2_set_plane_payload(vb, 0, size); + buffer->iss_addr = addr; + return 0; +} + +static void iss_video_buf_queue(struct vb2_buffer *vb) +{ + struct iss_video_fh *vfh = vb2_get_drv_priv(vb->vb2_queue); + struct iss_video *video = vfh->video; + struct iss_buffer *buffer = container_of(vb, struct iss_buffer, vb); + struct iss_pipeline *pipe = to_iss_pipeline(&video->video.entity); + unsigned int empty; + unsigned long flags; + + spin_lock_irqsave(&video->qlock, flags); + empty = list_empty(&video->dmaqueue); + list_add_tail(&buffer->list, &video->dmaqueue); + spin_unlock_irqrestore(&video->qlock, flags); + + if (empty) { + enum iss_pipeline_state state; + unsigned int start; + + if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) + state = ISS_PIPELINE_QUEUE_OUTPUT; + else + state = ISS_PIPELINE_QUEUE_INPUT; + + spin_lock_irqsave(&pipe->lock, flags); + pipe->state |= state; + video->ops->queue(video, buffer); + video->dmaqueue_flags |= ISS_VIDEO_DMAQUEUE_QUEUED; + + start = iss_pipeline_ready(pipe); + if (start) + pipe->state |= ISS_PIPELINE_STREAM; + spin_unlock_irqrestore(&pipe->lock, flags); + + if (start) + omap4iss_pipeline_set_stream(pipe, + ISS_PIPELINE_STREAM_SINGLESHOT); + } +} + +static struct vb2_ops iss_video_vb2ops = { + .queue_setup = iss_video_queue_setup, + .buf_prepare = iss_video_buf_prepare, + .buf_queue = iss_video_buf_queue, + .buf_cleanup = iss_video_buf_cleanup, +}; + +/* + * omap4iss_video_buffer_next - Complete the current buffer and return the next + * @video: ISS 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 VB2_BUF_STATE_DONE if no + * error has been flagged in the pipeline, or to VB2_BUF_STATE_ERROR otherwise. + * + * 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 iss_buffer *omap4iss_video_buffer_next(struct iss_video *video) +{ + struct iss_pipeline *pipe = to_iss_pipeline(&video->video.entity); + enum iss_pipeline_state state; + struct iss_buffer *buf; + unsigned long flags; + struct timespec ts; + + spin_lock_irqsave(&video->qlock, flags); + if (WARN_ON(list_empty(&video->dmaqueue))) { + spin_unlock_irqrestore(&video->qlock, flags); + return NULL; + } + + buf = list_first_entry(&video->dmaqueue, struct iss_buffer, + list); + list_del(&buf->list); + spin_unlock_irqrestore(&video->qlock, flags); + + ktime_get_ts(&ts); + buf->vb.v4l2_buf.timestamp.tv_sec = ts.tv_sec; + buf->vb.v4l2_buf.timestamp.tv_usec = ts.tv_nsec / NSEC_PER_USEC; + + /* Do frame number propagation only if this is the output video node. + * Frame number either comes from the CSI receivers or it gets + * incremented here if H3A is not active. + * Note: There is no guarantee that the output buffer will finish + * first, so the input number might lag behind by 1 in some cases. + */ + if (video == pipe->output && !pipe->do_propagation) + buf->vb.v4l2_buf.sequence = atomic_inc_return(&pipe->frame_number); + else + buf->vb.v4l2_buf.sequence = atomic_read(&pipe->frame_number); + + vb2_buffer_done(&buf->vb, pipe->error ? VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE); + pipe->error = false; + + spin_lock_irqsave(&video->qlock, flags); + if (list_empty(&video->dmaqueue)) { + spin_unlock_irqrestore(&video->qlock, flags); + if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) + state = ISS_PIPELINE_QUEUE_OUTPUT + | ISS_PIPELINE_STREAM; + else + state = ISS_PIPELINE_QUEUE_INPUT + | ISS_PIPELINE_STREAM; + + spin_lock_irqsave(&pipe->lock, flags); + pipe->state &= ~state; + if (video->pipe.stream_state == ISS_PIPELINE_STREAM_CONTINUOUS) + video->dmaqueue_flags |= ISS_VIDEO_DMAQUEUE_UNDERRUN; + spin_unlock_irqrestore(&pipe->lock, flags); + return NULL; + } + + if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && pipe->input != NULL) { + spin_lock_irqsave(&pipe->lock, flags); + pipe->state &= ~ISS_PIPELINE_STREAM; + spin_unlock_irqrestore(&pipe->lock, flags); + } + + buf = list_first_entry(&video->dmaqueue, struct iss_buffer, + list); + spin_unlock_irqrestore(&video->qlock, flags); + buf->vb.state = VB2_BUF_STATE_ACTIVE; + return buf; +} + +/* ----------------------------------------------------------------------------- + * V4L2 ioctls + */ + +static int +iss_video_querycap(struct file *file, void *fh, struct v4l2_capability *cap) +{ + struct iss_video *video = video_drvdata(file); + + strlcpy(cap->driver, ISS_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 +iss_video_get_format(struct file *file, void *fh, struct v4l2_format *format) +{ + struct iss_video_fh *vfh = to_iss_video_fh(fh); + struct iss_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 +iss_video_set_format(struct file *file, void *fh, struct v4l2_format *format) +{ + struct iss_video_fh *vfh = to_iss_video_fh(fh); + struct iss_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. + */ + iss_video_pix_to_mbus(&format->fmt.pix, &fmt); + iss_video_mbus_to_pix(video, &fmt, &format->fmt.pix); + + vfh->format = *format; + + mutex_unlock(&video->mutex); + return 0; +} + +static int +iss_video_try_format(struct file *file, void *fh, struct v4l2_format *format) +{ + struct iss_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 = iss_video_remote_subdev(video, &pad); + if (subdev == NULL) + return -EINVAL; + + iss_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; + + iss_video_mbus_to_pix(video, &fmt.format, &format->fmt.pix); + return 0; +} + +static int +iss_video_cropcap(struct file *file, void *fh, struct v4l2_cropcap *cropcap) +{ + struct iss_video *video = video_drvdata(file); + struct v4l2_subdev *subdev; + int ret; + + subdev = iss_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 +iss_video_get_crop(struct file *file, void *fh, struct v4l2_crop *crop) +{ + struct iss_video *video = video_drvdata(file); + struct v4l2_subdev_format format; + struct v4l2_subdev *subdev; + u32 pad; + int ret; + + subdev = iss_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 +iss_video_set_crop(struct file *file, void *fh, const struct v4l2_crop *crop) +{ + struct iss_video *video = video_drvdata(file); + struct v4l2_subdev *subdev; + int ret; + + subdev = iss_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 +iss_video_get_param(struct file *file, void *fh, struct v4l2_streamparm *a) +{ + struct iss_video_fh *vfh = to_iss_video_fh(fh); + struct iss_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 +iss_video_set_param(struct file *file, void *fh, struct v4l2_streamparm *a) +{ + struct iss_video_fh *vfh = to_iss_video_fh(fh); + struct iss_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 +iss_video_reqbufs(struct file *file, void *fh, struct v4l2_requestbuffers *rb) +{ + struct iss_video_fh *vfh = to_iss_video_fh(fh); + + return vb2_reqbufs(&vfh->queue, rb); +} + +static int +iss_video_querybuf(struct file *file, void *fh, struct v4l2_buffer *b) +{ + struct iss_video_fh *vfh = to_iss_video_fh(fh); + + return vb2_querybuf(&vfh->queue, b); +} + +static int +iss_video_qbuf(struct file *file, void *fh, struct v4l2_buffer *b) +{ + struct iss_video_fh *vfh = to_iss_video_fh(fh); + + return vb2_qbuf(&vfh->queue, b); +} + +static int +iss_video_dqbuf(struct file *file, void *fh, struct v4l2_buffer *b) +{ + struct iss_video_fh *vfh = to_iss_video_fh(fh); + + return vb2_dqbuf(&vfh->queue, b, file->f_flags & O_NONBLOCK); +} + +/* + * Stream management + * + * Every ISS 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 ISS 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. ISS 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 +iss_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type) +{ + struct iss_video_fh *vfh = to_iss_video_fh(fh); + struct iss_video *video = video_drvdata(file); + enum iss_pipeline_state state; + struct iss_pipeline *pipe; + struct iss_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_iss_pipeline(&video->video.entity) : &video->pipe; + pipe->external = NULL; + pipe->external_rate = 0; + pipe->external_bpp = 0; + + if (video->iss->pdata->set_constraints) + video->iss->pdata->set_constraints(video->iss, true); + + ret = media_entity_pipeline_start(&video->video.entity, &pipe->pipe); + if (ret < 0) + goto err_media_entity_pipeline_start; + + /* Verify that the currently configured format matches the output of + * the connected subdev. + */ + ret = iss_video_check_format(video, vfh); + if (ret < 0) + goto err_iss_video_check_format; + + video->bpl_padding = ret; + video->bpl_value = vfh->format.fmt.pix.bytesperline; + + /* Find the ISS video node connected at the far end of the pipeline and + * update the pipeline. + */ + far_end = iss_video_far_end(video); + + if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) { + state = ISS_PIPELINE_STREAM_OUTPUT | ISS_PIPELINE_IDLE_OUTPUT; + pipe->input = far_end; + pipe->output = video; + } else { + if (far_end == NULL) { + ret = -EPIPE; + goto err_iss_video_check_format; + } + + state = ISS_PIPELINE_STREAM_INPUT | ISS_PIPELINE_IDLE_INPUT; + pipe->input = video; + pipe->output = far_end; + } + + spin_lock_irqsave(&pipe->lock, flags); + pipe->state &= ~ISS_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); + spin_lock_init(&video->qlock); + atomic_set(&pipe->frame_number, -1); + + ret = vb2_streamon(&vfh->queue, type); + if (ret < 0) + goto err_iss_video_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) { + unsigned long flags; + ret = omap4iss_pipeline_set_stream(pipe, + ISS_PIPELINE_STREAM_CONTINUOUS); + if (ret < 0) + goto err_omap4iss_set_stream; + spin_lock_irqsave(&video->qlock, flags); + if (list_empty(&video->dmaqueue)) + video->dmaqueue_flags |= ISS_VIDEO_DMAQUEUE_UNDERRUN; + spin_unlock_irqrestore(&video->qlock, flags); + } + + if (ret < 0) { +err_omap4iss_set_stream: + vb2_streamoff(&vfh->queue, type); +err_iss_video_check_format: + media_entity_pipeline_stop(&video->video.entity); +err_media_entity_pipeline_start: + if (video->iss->pdata->set_constraints) + video->iss->pdata->set_constraints(video->iss, false); + video->queue = NULL; + } + + if (!ret) + video->streaming = 1; + + mutex_unlock(&video->stream_lock); + return ret; +} + +static int +iss_video_streamoff(struct file *file, void *fh, enum v4l2_buf_type type) +{ + struct iss_video_fh *vfh = to_iss_video_fh(fh); + struct iss_video *video = video_drvdata(file); + struct iss_pipeline *pipe = to_iss_pipeline(&video->video.entity); + enum iss_pipeline_state state; + unsigned long flags; + + if (type != video->type) + return -EINVAL; + + mutex_lock(&video->stream_lock); + + if (!vb2_is_streaming(&vfh->queue)) + goto done; + + /* Update the pipeline state. */ + if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) + state = ISS_PIPELINE_STREAM_OUTPUT + | ISS_PIPELINE_QUEUE_OUTPUT; + else + state = ISS_PIPELINE_STREAM_INPUT + | ISS_PIPELINE_QUEUE_INPUT; + + spin_lock_irqsave(&pipe->lock, flags); + pipe->state &= ~state; + spin_unlock_irqrestore(&pipe->lock, flags); + + /* Stop the stream. */ + omap4iss_pipeline_set_stream(pipe, ISS_PIPELINE_STREAM_STOPPED); + vb2_streamoff(&vfh->queue, type); + video->queue = NULL; + video->streaming = 0; + + if (video->iss->pdata->set_constraints) + video->iss->pdata->set_constraints(video->iss, false); + media_entity_pipeline_stop(&video->video.entity); + +done: + mutex_unlock(&video->stream_lock); + return 0; +} + +static int +iss_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 +iss_video_g_input(struct file *file, void *fh, unsigned int *input) +{ + *input = 0; + + return 0; +} + +static const struct v4l2_ioctl_ops iss_video_ioctl_ops = { + .vidioc_querycap = iss_video_querycap, + .vidioc_g_fmt_vid_cap = iss_video_get_format, + .vidioc_s_fmt_vid_cap = iss_video_set_format, + .vidioc_try_fmt_vid_cap = iss_video_try_format, + .vidioc_g_fmt_vid_out = iss_video_get_format, + .vidioc_s_fmt_vid_out = iss_video_set_format, + .vidioc_try_fmt_vid_out = iss_video_try_format, + .vidioc_cropcap = iss_video_cropcap, + .vidioc_g_crop = iss_video_get_crop, + .vidioc_s_crop = iss_video_set_crop, + .vidioc_g_parm = iss_video_get_param, + .vidioc_s_parm = iss_video_set_param, + .vidioc_reqbufs = iss_video_reqbufs, + .vidioc_querybuf = iss_video_querybuf, + .vidioc_qbuf = iss_video_qbuf, + .vidioc_dqbuf = iss_video_dqbuf, + .vidioc_streamon = iss_video_streamon, + .vidioc_streamoff = iss_video_streamoff, + .vidioc_enum_input = iss_video_enum_input, + .vidioc_g_input = iss_video_g_input, +}; + +/* ----------------------------------------------------------------------------- + * V4L2 file operations + */ + +static int iss_video_open(struct file *file) +{ + struct iss_video *video = video_drvdata(file); + struct iss_video_fh *handle; + struct vb2_queue *q; + 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 (omap4iss_get(video->iss) == NULL) { + ret = -EBUSY; + goto done; + } + + ret = omap4iss_pipeline_pm_use(&video->video.entity, 1); + if (ret < 0) { + omap4iss_put(video->iss); + goto done; + } + + video->alloc_ctx = vb2_dma_contig_init_ctx(video->iss->dev); + if (IS_ERR(video->alloc_ctx)) { + ret = PTR_ERR(video->alloc_ctx); + omap4iss_put(video->iss); + goto done; + } + + q = &handle->queue; + + q->type = video->type; + q->io_modes = VB2_MMAP; + q->drv_priv = handle; + q->ops = &iss_video_vb2ops; + q->mem_ops = &vb2_dma_contig_memops; + q->buf_struct_size = sizeof(struct iss_buffer); + + ret = vb2_queue_init(q); + if (ret) { + omap4iss_put(video->iss); + goto done; + } + + memset(&handle->format, 0, sizeof(handle->format)); + handle->format.type = video->type; + handle->timeperframe.denominator = 1; + + handle->video = video; + file->private_data = &handle->vfh; + +done: + if (ret < 0) { + v4l2_fh_del(&handle->vfh); + kfree(handle); + } + + return ret; +} + +static int iss_video_release(struct file *file) +{ + struct iss_video *video = video_drvdata(file); + struct v4l2_fh *vfh = file->private_data; + struct iss_video_fh *handle = to_iss_video_fh(vfh); + + /* Disable streaming and free the buffers queue resources. */ + iss_video_streamoff(file, vfh, video->type); + + omap4iss_pipeline_pm_use(&video->video.entity, 0); + + /* Release the videobuf2 queue */ + vb2_queue_release(&handle->queue); + + /* Release the file handle. */ + v4l2_fh_del(vfh); + kfree(handle); + file->private_data = NULL; + + omap4iss_put(video->iss); + + return 0; +} + +static unsigned int iss_video_poll(struct file *file, poll_table *wait) +{ + struct iss_video_fh *vfh = to_iss_video_fh(file->private_data); + + return vb2_poll(&vfh->queue, file, wait); +} + +static int iss_video_mmap(struct file *file, struct vm_area_struct *vma) +{ + struct iss_video_fh *vfh = to_iss_video_fh(file->private_data); + + return vb2_mmap(&vfh->queue, vma);; +} + +static struct v4l2_file_operations iss_video_fops = { + .owner = THIS_MODULE, + .unlocked_ioctl = video_ioctl2, + .open = iss_video_open, + .release = iss_video_release, + .poll = iss_video_poll, + .mmap = iss_video_mmap, +}; + +/* ----------------------------------------------------------------------------- + * ISS video core + */ + +static const struct iss_video_operations iss_video_dummy_ops = { +}; + +int omap4iss_video_init(struct iss_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 = &iss_video_dummy_ops; + + video->video.fops = &iss_video_fops; + snprintf(video->video.name, sizeof(video->video.name), + "OMAP4 ISS %s %s", name, direction); + video->video.vfl_type = VFL_TYPE_GRABBER; + video->video.release = video_device_release_empty; + video->video.ioctl_ops = &iss_video_ioctl_ops; + video->pipe.stream_state = ISS_PIPELINE_STREAM_STOPPED; + + video_set_drvdata(&video->video, video); + + return 0; +} + +void omap4iss_video_cleanup(struct iss_video *video) +{ + media_entity_cleanup(&video->video.entity); + mutex_destroy(&video->stream_lock); + mutex_destroy(&video->mutex); +} + +int omap4iss_video_register(struct iss_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 omap4iss_video_unregister(struct iss_video *video) +{ + if (video_is_registered(&video->video)) + video_unregister_device(&video->video); +} diff --git a/drivers/staging/media/omap4iss/iss_video.h b/drivers/staging/media/omap4iss/iss_video.h new file mode 100644 index 000000000000..8cf1b3500e44 --- /dev/null +++ b/drivers/staging/media/omap4iss/iss_video.h @@ -0,0 +1,201 @@ +/* + * TI OMAP4 ISS V4L2 Driver - Generic video node + * + * Copyright (C) 2012 Texas Instruments, Inc. + * + * Author: Sergio Aguirre <sergio.a.aguirre@gmail.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#ifndef OMAP4_ISS_VIDEO_H +#define OMAP4_ISS_VIDEO_H + +#include <linux/v4l2-mediabus.h> +#include <media/media-entity.h> +#include <media/v4l2-dev.h> +#include <media/v4l2-fh.h> +#include <media/videobuf2-core.h> +#include <media/videobuf2-dma-contig.h> + +#define ISS_VIDEO_DRIVER_NAME "issvideo" +#define ISS_VIDEO_DRIVER_VERSION "0.0.2" + +struct iss_device; +struct iss_video; +struct v4l2_mbus_framefmt; +struct v4l2_pix_format; + +/* + * struct iss_format_info - ISS media bus format information + * @code: V4L2 media bus format code + * @truncated: V4L2 media bus format code for the same format truncated to 10 + * bits. Identical to @code if the format is 10 bits wide or less. + * @uncompressed: V4L2 media bus format code for the corresponding uncompressed + * format. Identical to @code if the format is not DPCM compressed. + * @flavor: V4L2 media bus format code for the same pixel layout but + * shifted to be 8 bits per pixel. =0 if format is not shiftable. + * @pixelformat: V4L2 pixel format FCC identifier + * @bpp: Bits per pixel + */ +struct iss_format_info { + enum v4l2_mbus_pixelcode code; + enum v4l2_mbus_pixelcode truncated; + enum v4l2_mbus_pixelcode uncompressed; + enum v4l2_mbus_pixelcode flavor; + u32 pixelformat; + unsigned int bpp; +}; + +enum iss_pipeline_stream_state { + ISS_PIPELINE_STREAM_STOPPED = 0, + ISS_PIPELINE_STREAM_CONTINUOUS = 1, + ISS_PIPELINE_STREAM_SINGLESHOT = 2, +}; + +enum iss_pipeline_state { + /* The stream has been started on the input video node. */ + ISS_PIPELINE_STREAM_INPUT = 1, + /* The stream has been started on the output video node. */ + ISS_PIPELINE_STREAM_OUTPUT = (1 << 1), + /* At least one buffer is queued on the input video node. */ + ISS_PIPELINE_QUEUE_INPUT = (1 << 2), + /* At least one buffer is queued on the output video node. */ + ISS_PIPELINE_QUEUE_OUTPUT = (1 << 3), + /* The input entity is idle, ready to be started. */ + ISS_PIPELINE_IDLE_INPUT = (1 << 4), + /* The output entity is idle, ready to be started. */ + ISS_PIPELINE_IDLE_OUTPUT = (1 << 5), + /* The pipeline is currently streaming. */ + ISS_PIPELINE_STREAM = (1 << 6), +}; + +/* + * struct iss_pipeline - An OMAP4 ISS hardware pipeline + * @error: A hardware error occurred during capture + */ +struct iss_pipeline { + struct media_pipeline pipe; + spinlock_t lock; /* Pipeline state and queue flags */ + unsigned int state; + enum iss_pipeline_stream_state stream_state; + struct iss_video *input; + struct iss_video *output; + atomic_t frame_number; + bool do_propagation; /* of frame number */ + bool error; + struct v4l2_fract max_timeperframe; + struct v4l2_subdev *external; + unsigned int external_rate; + int external_bpp; +}; + +#define to_iss_pipeline(__e) \ + container_of((__e)->pipe, struct iss_pipeline, pipe) + +static inline int iss_pipeline_ready(struct iss_pipeline *pipe) +{ + return pipe->state == (ISS_PIPELINE_STREAM_INPUT | + ISS_PIPELINE_STREAM_OUTPUT | + ISS_PIPELINE_QUEUE_INPUT | + ISS_PIPELINE_QUEUE_OUTPUT | + ISS_PIPELINE_IDLE_INPUT | + ISS_PIPELINE_IDLE_OUTPUT); +} + +/* + * struct iss_buffer - ISS buffer + * @buffer: ISS video buffer + * @iss_addr: Physical address of the buffer. + */ +struct iss_buffer { + /* common v4l buffer stuff -- must be first */ + struct vb2_buffer vb; + struct list_head list; + dma_addr_t iss_addr; +}; + +#define to_iss_buffer(buf) container_of(buf, struct iss_buffer, buffer) + +enum iss_video_dmaqueue_flags { + /* Set if DMA queue becomes empty when ISS_PIPELINE_STREAM_CONTINUOUS */ + ISS_VIDEO_DMAQUEUE_UNDERRUN = (1 << 0), + /* Set when queuing buffer to an empty DMA queue */ + ISS_VIDEO_DMAQUEUE_QUEUED = (1 << 1), +}; + +#define iss_video_dmaqueue_flags_clr(video) \ + ({ (video)->dmaqueue_flags = 0; }) + +/* + * struct iss_video_operations - ISS video operations + * @queue: Resume streaming when a buffer is queued. Called on VIDIOC_QBUF + * if there was no buffer previously queued. + */ +struct iss_video_operations { + int(*queue)(struct iss_video *video, struct iss_buffer *buffer); +}; + +struct iss_video { + struct video_device video; + enum v4l2_buf_type type; + struct media_pad pad; + + struct mutex mutex; /* format and crop settings */ + atomic_t active; + + struct iss_device *iss; + + unsigned int capture_mem; + unsigned int bpl_alignment; /* alignment value */ + unsigned int bpl_zero_padding; /* whether the alignment is optional */ + unsigned int bpl_max; /* maximum bytes per line value */ + unsigned int bpl_value; /* bytes per line value */ + unsigned int bpl_padding; /* padding at end of line */ + + /* Entity video node streaming */ + unsigned int streaming:1; + + /* Pipeline state */ + struct iss_pipeline pipe; + struct mutex stream_lock; /* pipeline and stream states */ + + /* Video buffers queue */ + struct vb2_queue *queue; + spinlock_t qlock; /* Spinlock for dmaqueue */ + struct list_head dmaqueue; + enum iss_video_dmaqueue_flags dmaqueue_flags; + struct vb2_alloc_ctx *alloc_ctx; + + const struct iss_video_operations *ops; +}; + +#define to_iss_video(vdev) container_of(vdev, struct iss_video, video) + +struct iss_video_fh { + struct v4l2_fh vfh; + struct iss_video *video; + struct vb2_queue queue; + struct v4l2_format format; + struct v4l2_fract timeperframe; +}; + +#define to_iss_video_fh(fh) container_of(fh, struct iss_video_fh, vfh) +#define iss_video_queue_to_iss_video_fh(q) \ + container_of(q, struct iss_video_fh, queue) + +int omap4iss_video_init(struct iss_video *video, const char *name); +void omap4iss_video_cleanup(struct iss_video *video); +int omap4iss_video_register(struct iss_video *video, + struct v4l2_device *vdev); +void omap4iss_video_unregister(struct iss_video *video); +struct iss_buffer *omap4iss_video_buffer_next(struct iss_video *video); +struct media_pad *omap4iss_video_remote_pad(struct iss_video *video); + +const struct iss_format_info * +omap4iss_video_format_info(enum v4l2_mbus_pixelcode code); + +#endif /* OMAP4_ISS_VIDEO_H */ |