| Message ID | 1363031092-29950-6-git-send-email-s.nawrocki@samsung.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Mon 11 March 2013 20:44:49 Sylwester Nawrocki wrote: > This patch adds a video capture node for the FIMC-IS ISP IP block > and Makefile/Kconfig to actually enable the driver's compilation. > > The ISP video capture driver is still a work in progress. > > Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com> > Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> > --- > drivers/media/platform/s5p-fimc/Kconfig | 13 + > drivers/media/platform/s5p-fimc/Makefile | 4 + > drivers/media/platform/s5p-fimc/fimc-isp-video.c | 414 ++++++++++++++++++++++ > drivers/media/platform/s5p-fimc/fimc-isp-video.h | 50 +++ > 4 files changed, 481 insertions(+) > create mode 100644 drivers/media/platform/s5p-fimc/fimc-isp-video.c > create mode 100644 drivers/media/platform/s5p-fimc/fimc-isp-video.h > > diff --git a/drivers/media/platform/s5p-fimc/Kconfig b/drivers/media/platform/s5p-fimc/Kconfig > index c16b20d..1253e25 100644 > --- a/drivers/media/platform/s5p-fimc/Kconfig > +++ b/drivers/media/platform/s5p-fimc/Kconfig > @@ -46,4 +46,17 @@ config VIDEO_EXYNOS_FIMC_LITE > module will be called exynos-fimc-lite. > endif > > +if (SOC_EXYNOS4212 || SOC_EXYNOS4412) && OF && !ARCH_MULTIPLATFORM > + > +config VIDEO_EXYNOS4_FIMC_IS > + tristate "EXYNOS4x12 FIMC-IS (Imaging Subsystem) driver" > + select VIDEOBUF2_DMA_CONTIG > + help > + This is a V4L2 driver for Samsung EXYNOS4x12 SoC FIMC-IS > + (Imaging Subsystem). > + > + To compile this driver as a module, choose M here: the > + module will be called exynos-fimc-is. > +endif > + > endif # VIDEO_SAMSUNG_S5P_FIMC > diff --git a/drivers/media/platform/s5p-fimc/Makefile b/drivers/media/platform/s5p-fimc/Makefile > index 4648514..55b171a 100644 > --- a/drivers/media/platform/s5p-fimc/Makefile > +++ b/drivers/media/platform/s5p-fimc/Makefile > @@ -1,7 +1,11 @@ > s5p-fimc-objs := fimc-core.o fimc-reg.o fimc-m2m.o fimc-capture.o fimc-mdevice.o > exynos-fimc-lite-objs += fimc-lite-reg.o fimc-lite.o > +exynos-fimc-is-objs := fimc-is.o fimc-isp.o fimc-is-sensor.o fimc-is-regs.o > +exynos-fimc-is-objs += fimc-is-param.o fimc-is-errno.o fimc-is-i2c.o > +exynos-fimc-is-objs += fimc-isp-video.o > s5p-csis-objs := mipi-csis.o > > obj-$(CONFIG_VIDEO_S5P_MIPI_CSIS) += s5p-csis.o > obj-$(CONFIG_VIDEO_EXYNOS_FIMC_LITE) += exynos-fimc-lite.o > +obj-$(CONFIG_VIDEO_EXYNOS4_FIMC_IS) += exynos-fimc-is.o > obj-$(CONFIG_VIDEO_S5P_FIMC) += s5p-fimc.o > diff --git a/drivers/media/platform/s5p-fimc/fimc-isp-video.c b/drivers/media/platform/s5p-fimc/fimc-isp-video.c > new file mode 100644 > index 0000000..bdeacaa > --- /dev/null > +++ b/drivers/media/platform/s5p-fimc/fimc-isp-video.c > @@ -0,0 +1,414 @@ > +/* > + * Samsung EXYNOS4x12 FIMC-IS (Imaging Subsystem) driver > + * > + * Copyright (C) 2013 Samsung Electronics Co., Ltd. > + * Author: Sylwester Nawrocki <s.nawrocki@samsung.com> > + * > + * 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. > + */ > + > +#include <linux/device.h> > +#include <linux/delay.h> > +#include <linux/errno.h> > +#include <linux/kernel.h> > +#include <linux/module.h> > +#include <linux/types.h> > +#include <linux/printk.h> > +#include <linux/pm_runtime.h> > +#include <linux/slab.h> > +#include <linux/videodev2.h> > + > +#include <media/v4l2-device.h> > +#include <media/v4l2-ioctl.h> > +#include <media/videobuf2-core.h> > +#include <media/videobuf2-dma-contig.h> > + > +#include "fimc-mdevice.h" > +#include "fimc-core.h" > +#include "fimc-is.h" > + > +static int isp_video_capture_start_streaming(struct vb2_queue *q, > + unsigned int count) > +{ > + /* TODO: start ISP output DMA */ > + return 0; > +} > + > +static int isp_video_capture_stop_streaming(struct vb2_queue *q) > +{ > + /* TODO: stop ISP output DMA */ > + return 0; > +} > + > +static int isp_video_capture_queue_setup(struct vb2_queue *vq, > + const struct v4l2_format *pfmt, > + unsigned int *num_buffers, unsigned int *num_planes, > + unsigned int sizes[], void *allocators[]) > +{ > + const struct v4l2_pix_format_mplane *pixm = NULL; > + struct fimc_isp *isp = vq->drv_priv; > + struct fimc_isp_frame *frame = &isp->out_frame; > + const struct fimc_fmt *fmt = isp->video_capture_format; > + unsigned long wh; > + int i; > + > + if (pfmt) { > + pixm = &pfmt->fmt.pix_mp; > + fmt = fimc_isp_find_format(&pixm->pixelformat, NULL, -1); > + wh = pixm->width * pixm->height; > + } else { > + wh = frame->f_width * frame->f_height; > + } > + > + if (fmt == NULL) > + return -EINVAL; > + > + *num_planes = fmt->memplanes; > + > + for (i = 0; i < fmt->memplanes; i++) { > + unsigned int size = (wh * fmt->depth[i]) / 8; > + if (pixm) > + sizes[i] = max(size, pixm->plane_fmt[i].sizeimage); > + else > + sizes[i] = size; > + allocators[i] = isp->alloc_ctx; > + } > + > + return 0; > +} > + > +static int isp_video_capture_buffer_prepare(struct vb2_buffer *vb) > +{ > + struct vb2_queue *vq = vb->vb2_queue; > + struct fimc_isp *isp = vq->drv_priv; > + int i; > + > + if (isp->video_capture_format == NULL) > + return -EINVAL; > + > + for (i = 0; i < isp->video_capture_format->memplanes; i++) { > + unsigned long size = isp->payload[i]; > + > + if (vb2_plane_size(vb, i) < size) { > + v4l2_err(&isp->vfd, > + "User buffer too small (%ld < %ld)\n", > + vb2_plane_size(vb, i), size); > + return -EINVAL; > + } > + vb2_set_plane_payload(vb, i, size); > + } > + > + return 0; > +} > + > +static void isp_video_capture_buffer_queue(struct vb2_buffer *vb) > +{ > + /* TODO: */ > +} > + > +static void isp_video_lock(struct vb2_queue *vq) > +{ > + struct fimc_isp *isp = vb2_get_drv_priv(vq); > + mutex_lock(&isp->video_lock); > +} > + > +static void isp_video_unlock(struct vb2_queue *vq) > +{ > + struct fimc_isp *isp = vb2_get_drv_priv(vq); > + mutex_unlock(&isp->video_lock); > +} > + > +static const struct vb2_ops isp_video_capture_qops = { > + .queue_setup = isp_video_capture_queue_setup, > + .buf_prepare = isp_video_capture_buffer_prepare, > + .buf_queue = isp_video_capture_buffer_queue, > + .wait_prepare = isp_video_unlock, > + .wait_finish = isp_video_lock, > + .start_streaming = isp_video_capture_start_streaming, > + .stop_streaming = isp_video_capture_stop_streaming, > +}; > + > +static int isp_video_capture_open(struct file *file) > +{ > + struct fimc_isp *isp = video_drvdata(file); > + int ret = 0; > + > + if (mutex_lock_interruptible(&isp->video_lock)) > + return -ERESTARTSYS; > + > + /* ret = pm_runtime_get_sync(&isp->pdev->dev); */ > + if (ret < 0) > + goto done; > + > + ret = v4l2_fh_open(file); > + if (ret < 0) > + goto done; > + > + /* TODO: prepare video pipeline */ > +done: > + mutex_unlock(&isp->video_lock); > + return ret; > +} > + > +static int isp_video_capture_close(struct file *file) > +{ > + struct fimc_isp *isp = video_drvdata(file); > + int ret = 0; > + > + mutex_lock(&isp->video_lock); > + > + if (isp->out_path == FIMC_IO_DMA) { > + /* TODO: stop capture, cleanup */ > + } > + > + /* pm_runtime_put(&isp->pdev->dev); */ > + > + if (isp->ref_count == 0) > + vb2_queue_release(&isp->capture_vb_queue); > + > + ret = v4l2_fh_release(file); > + > + mutex_unlock(&isp->video_lock); > + return ret; > +} > + > +static unsigned int isp_video_capture_poll(struct file *file, > + struct poll_table_struct *wait) > +{ > + struct fimc_isp *isp = video_drvdata(file); > + int ret; > + > + mutex_lock(&isp->video_lock); > + ret = vb2_poll(&isp->capture_vb_queue, file, wait); > + mutex_unlock(&isp->video_lock); > + return ret; > +} > + > +static int isp_video_capture_mmap(struct file *file, struct vm_area_struct *vma) > +{ > + struct fimc_isp *isp = video_drvdata(file); > + int ret; > + > + if (mutex_lock_interruptible(&isp->video_lock)) > + return -ERESTARTSYS; > + > + ret = vb2_mmap(&isp->capture_vb_queue, vma); > + mutex_unlock(&isp->video_lock); > + > + return ret; > +} > + > +static const struct v4l2_file_operations isp_video_capture_fops = { > + .owner = THIS_MODULE, > + .open = isp_video_capture_open, > + .release = isp_video_capture_close, > + .poll = isp_video_capture_poll, > + .unlocked_ioctl = video_ioctl2, > + .mmap = isp_video_capture_mmap, Can't you use the helper functions vb2_fop_open/release/poll/mmap here? > +}; > + > +/* > + * Video node ioctl operations > + */ > +static int fimc_isp_capture_querycap_capture(struct file *file, void *priv, > + struct v4l2_capability *cap) > +{ > + > + strlcpy(cap->driver, FIMC_IS_DRV_NAME, sizeof(cap->driver)); > + strlcpy(cap->card, FIMC_IS_DRV_NAME, sizeof(cap->card)); > + snprintf(cap->bus_info, sizeof(cap->bus_info), > + "platform:exynos4x12-isp"); > + > + cap->device_caps = V4L2_CAP_STREAMING; > + cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS; > + > + return 0; > +} > + > +static int fimc_isp_capture_enum_fmt_mplane(struct file *file, void *priv, > + struct v4l2_fmtdesc *f) > +{ > + const struct fimc_fmt *fmt; > + > + if (f->index >= FIMC_ISP_NUM_FORMATS) > + return -EINVAL; > + > + fmt = fimc_isp_find_format(NULL, NULL, f->index); > + if (WARN_ON(fmt == NULL)) > + return -EINVAL; > + > + strlcpy(f->description, fmt->name, sizeof(f->description)); > + f->pixelformat = fmt->fourcc; > + > + return 0; > +} > + > +static int fimc_isp_capture_g_fmt_mplane(struct file *file, void *fh, > + struct v4l2_format *f) > +{ > + /* TODO: */ > + return 0; > +} > + > +static int fimc_isp_capture_try_fmt(struct fimc_isp *isp, > + struct v4l2_pix_format_mplane *pixm, > + const struct fimc_fmt **ffmt) > +{ > + /* TODO: */ > + return 0; > +} > + > +static int fimc_isp_capture_try_fmt_mplane(struct file *file, void *fh, > + struct v4l2_format *f) > +{ > + struct fimc_isp *isp = video_drvdata(file); > + return fimc_isp_capture_try_fmt(isp, &f->fmt.pix_mp, NULL); > +} > + > +static int fimc_isp_capture_s_fmt_mplane(struct file *file, void *priv, > + struct v4l2_format *f) > +{ > + /* TODO: */ > + return 0; > +} > + > +static int fimc_isp_pipeline_validate(struct fimc_isp *isp) > +{ > + /* TODO: */ > + return 0; > +} > + > +static int fimc_isp_capture_streamon(struct file *file, void *priv, > + enum v4l2_buf_type type) > +{ > + struct fimc_isp *isp = video_drvdata(file); > + struct v4l2_subdev *sensor = isp->pipeline.subdevs[IDX_SENSOR]; > + struct fimc_pipeline *p = &isp->pipeline; > + int ret; > + > + /* TODO: check if the OTF interface is not running */ > + > + ret = media_entity_pipeline_start(&sensor->entity, p->m_pipeline); > + if (ret < 0) > + return ret; > + > + ret = fimc_isp_pipeline_validate(isp); > + if (ret) { > + media_entity_pipeline_stop(&sensor->entity); > + return ret; > + } > + > + return vb2_streamon(&isp->capture_vb_queue, type); > +} > + > +static int fimc_isp_capture_streamoff(struct file *file, void *priv, > + enum v4l2_buf_type type) > +{ > + struct fimc_isp *isp = video_drvdata(file); > + struct v4l2_subdev *sd = isp->pipeline.subdevs[IDX_SENSOR]; > + int ret; > + > + ret = vb2_streamoff(&isp->capture_vb_queue, type); > + if (ret == 0) > + media_entity_pipeline_stop(&sd->entity); > + return ret; > +} > + > +static int fimc_isp_capture_reqbufs(struct file *file, void *priv, > + struct v4l2_requestbuffers *reqbufs) > +{ > + struct fimc_isp *isp = video_drvdata(file); > + int ret; > + > + reqbufs->count = max_t(u32, FIMC_IS_REQ_BUFS_MIN, reqbufs->count); > + ret = vb2_reqbufs(&isp->capture_vb_queue, reqbufs); You probably want to call vb2_ioctl_reqbufs here since that does additional ownership checks that vb2_reqbufs doesn't. The same is true for vb2_ioctl_streamon/off, BTW. > + if (!ret < 0) > + isp->reqbufs_count = reqbufs->count; > + > + return ret; > +} > + > +static const struct v4l2_ioctl_ops isp_video_capture_ioctl_ops = { > + .vidioc_querycap = fimc_isp_capture_querycap_capture, > + .vidioc_enum_fmt_vid_cap_mplane = fimc_isp_capture_enum_fmt_mplane, > + .vidioc_try_fmt_vid_cap_mplane = fimc_isp_capture_try_fmt_mplane, > + .vidioc_s_fmt_vid_cap_mplane = fimc_isp_capture_s_fmt_mplane, > + .vidioc_g_fmt_vid_cap_mplane = fimc_isp_capture_g_fmt_mplane, > + .vidioc_reqbufs = fimc_isp_capture_reqbufs, > + .vidioc_querybuf = vb2_ioctl_querybuf, > + .vidioc_prepare_buf = vb2_ioctl_prepare_buf, > + .vidioc_create_bufs = vb2_ioctl_create_bufs, > + .vidioc_qbuf = vb2_ioctl_qbuf, > + .vidioc_dqbuf = vb2_ioctl_dqbuf, > + .vidioc_streamon = fimc_isp_capture_streamon, > + .vidioc_streamoff = fimc_isp_capture_streamoff, > +}; > + > +int fimc_isp_video_device_register(struct fimc_isp *isp, > + struct v4l2_device *v4l2_dev) > +{ > + struct vb2_queue *q = &isp->capture_vb_queue; > + struct video_device *vfd = &isp->vfd; > + int ret; > + > + mutex_init(&isp->video_lock); > + INIT_LIST_HEAD(&isp->pending_buf_q); > + INIT_LIST_HEAD(&isp->active_buf_q); > + > + memset(vfd, 0, sizeof(*vfd)); > + snprintf(vfd->name, sizeof(vfd->name), "fimc-is-isp.capture"); > + > + isp->video_capture_format = fimc_isp_find_format(NULL, NULL, 0); > + isp->out_path = FIMC_IO_DMA; > + isp->ref_count = 0; > + isp->reqbufs_count = 0; > + > + memset(q, 0, sizeof(*q)); > + q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE; > + q->io_modes = VB2_MMAP; > + q->ops = &isp_video_capture_qops; > + q->mem_ops = &vb2_dma_contig_memops; > + q->buf_struct_size = sizeof(struct flite_buffer); > + q->drv_priv = isp; > + q->timestamp_type = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; > + > + ret = vb2_queue_init(q); > + if (ret < 0) > + return ret; > + > + vfd->queue = q; > + vfd->fops = &isp_video_capture_fops; > + vfd->ioctl_ops = &isp_video_capture_ioctl_ops; > + vfd->v4l2_dev = v4l2_dev; > + vfd->minor = -1; > + vfd->release = video_device_release_empty; > + vfd->lock = &isp->video_lock; > + > + isp->vd_pad.flags = MEDIA_PAD_FL_SINK; > + ret = media_entity_init(&vfd->entity, 1, &isp->vd_pad, 0); > + if (ret < 0) > + return ret; > + > + video_set_drvdata(vfd, isp); > + > + ret = video_register_device(vfd, VFL_TYPE_GRABBER, -1); > + if (ret < 0) { > + media_entity_cleanup(&vfd->entity); > + return ret; > + } > + > + v4l2_info(v4l2_dev, "Registered %s as /dev/%s\n", > + vfd->name, video_device_node_name(vfd)); > + > + return 0; > +} > + > +void fimc_isp_video_device_unregister(struct fimc_isp *isp) > +{ > + if (isp && video_is_registered(&isp->vfd)) { > + video_unregister_device(&isp->vfd); > + media_entity_cleanup(&isp->vfd.entity); > + } > +} Regards, Hans
On 03/12/2013 03:44 PM, Hans Verkuil wrote: > On Mon 11 March 2013 20:44:49 Sylwester Nawrocki wrote: [...] >> +static int isp_video_capture_open(struct file *file) >> +{ >> + struct fimc_isp *isp = video_drvdata(file); >> + int ret = 0; >> + >> + if (mutex_lock_interruptible(&isp->video_lock)) >> + return -ERESTARTSYS; >> + >> + /* ret = pm_runtime_get_sync(&isp->pdev->dev); */ >> + if (ret< 0) >> + goto done; >> + >> + ret = v4l2_fh_open(file); >> + if (ret< 0) >> + goto done; >> + >> + /* TODO: prepare video pipeline */ >> +done: >> + mutex_unlock(&isp->video_lock); >> + return ret; >> +} >> + >> +static int isp_video_capture_close(struct file *file) >> +{ >> + struct fimc_isp *isp = video_drvdata(file); >> + int ret = 0; >> + >> + mutex_lock(&isp->video_lock); >> + >> + if (isp->out_path == FIMC_IO_DMA) { >> + /* TODO: stop capture, cleanup */ >> + } >> + >> + /* pm_runtime_put(&isp->pdev->dev); */ >> + >> + if (isp->ref_count == 0) >> + vb2_queue_release(&isp->capture_vb_queue); >> + >> + ret = v4l2_fh_release(file); >> + >> + mutex_unlock(&isp->video_lock); >> + return ret; >> +} >> + >> +static unsigned int isp_video_capture_poll(struct file *file, >> + struct poll_table_struct *wait) >> +{ >> + struct fimc_isp *isp = video_drvdata(file); >> + int ret; >> + >> + mutex_lock(&isp->video_lock); >> + ret = vb2_poll(&isp->capture_vb_queue, file, wait); >> + mutex_unlock(&isp->video_lock); >> + return ret; >> +} >> + >> +static int isp_video_capture_mmap(struct file *file, struct vm_area_struct *vma) >> +{ >> + struct fimc_isp *isp = video_drvdata(file); >> + int ret; >> + >> + if (mutex_lock_interruptible(&isp->video_lock)) >> + return -ERESTARTSYS; >> + >> + ret = vb2_mmap(&isp->capture_vb_queue, vma); >> + mutex_unlock(&isp->video_lock); >> + >> + return ret; >> +} >> + >> +static const struct v4l2_file_operations isp_video_capture_fops = { >> + .owner = THIS_MODULE, >> + .open = isp_video_capture_open, >> + .release = isp_video_capture_close, >> + .poll = isp_video_capture_poll, >> + .unlocked_ioctl = video_ioctl2, >> + .mmap = isp_video_capture_mmap, > > Can't you use the helper functions vb2_fop_open/release/poll/mmap here? It seems vb2_fop_mmap/poll can be used directly, open(), release() are a bit more complicated as some media pipeline operations need to additionally be done within these callbacks. There is no vb2_fop_open(), and AFAICS v4l2_fh_open() is sufficient and intended as open() helper. For the next iteration I have used vb2_fop_release(), called indirectly, as it nicely simplifies things a bit. BTW, shouldn't vb2_fop_release() also be taking the lock ? Actually it is more useful for me in current form, but the drivers that directly assign it to struct v4l2_file_operations::open might be in trouble, unless I'm missing something. >> +}; >> + >> +/* >> + * Video node ioctl operations >> + */ [...] >> +static int fimc_isp_capture_streamon(struct file *file, void *priv, >> + enum v4l2_buf_type type) >> +{ >> + struct fimc_isp *isp = video_drvdata(file); >> + struct v4l2_subdev *sensor = isp->pipeline.subdevs[IDX_SENSOR]; >> + struct fimc_pipeline *p =&isp->pipeline; >> + int ret; >> + >> + /* TODO: check if the OTF interface is not running */ >> + >> + ret = media_entity_pipeline_start(&sensor->entity, p->m_pipeline); >> + if (ret< 0) >> + return ret; >> + >> + ret = fimc_isp_pipeline_validate(isp); >> + if (ret) { >> + media_entity_pipeline_stop(&sensor->entity); >> + return ret; >> + } >> + >> + return vb2_streamon(&isp->capture_vb_queue, type); >> +} >> + >> +static int fimc_isp_capture_streamoff(struct file *file, void *priv, >> + enum v4l2_buf_type type) >> +{ >> + struct fimc_isp *isp = video_drvdata(file); >> + struct v4l2_subdev *sd = isp->pipeline.subdevs[IDX_SENSOR]; >> + int ret; >> + >> + ret = vb2_streamoff(&isp->capture_vb_queue, type); >> + if (ret == 0) >> + media_entity_pipeline_stop(&sd->entity); >> + return ret; >> +} >> + >> +static int fimc_isp_capture_reqbufs(struct file *file, void *priv, >> + struct v4l2_requestbuffers *reqbufs) >> +{ >> + struct fimc_isp *isp = video_drvdata(file); >> + int ret; >> + >> + reqbufs->count = max_t(u32, FIMC_IS_REQ_BUFS_MIN, reqbufs->count); >> + ret = vb2_reqbufs(&isp->capture_vb_queue, reqbufs); > > You probably want to call vb2_ioctl_reqbufs here since that does additional > ownership checks that vb2_reqbufs doesn't. Yes, thanks for the suggestion. That was actually helpful, previously it wasn't immediately clear to me one can still take advantage of those vb2_ioctl_* helpers, mainly have the ownership handling in the core, and have some handlers assigned directly to v4l2_ioctl_ops an some called indirectly from the driver's own callbacks, should they need something else that is done in the helpers. I found those helpers really useful, especially in drivers that need to support several video nodes. Lots of boilerplate can be eliminated. And also vb2_ops_wait_prepare/finish are a simple and nice improvement. > The same is true for vb2_ioctl_streamon/off, BTW. Indeed. I have already applied all possible helpers for the next iteration. I need to yet resolve an issue with locking order, as I previously missed that media_entity_pipeline_start/stop() also takes the graph mutex. And currently the driver is supposed to take the graph mutex first and then the video mutex. Since the link_notify callback of the media device is called with the graph mutex already held. The only solution I came up so far is to provide unlocked versions of media_entity_pipeline_start/stop(). Ideally using video mutex in link_notify() callback should not be needed, but there are things done there needed for backward video device compatibility. -- Regards, Sylwester
On Sun March 17 2013 22:03:38 Sylwester Nawrocki wrote: > On 03/12/2013 03:44 PM, Hans Verkuil wrote: > > On Mon 11 March 2013 20:44:49 Sylwester Nawrocki wrote: > [...] > >> +static int isp_video_capture_open(struct file *file) > >> +{ > >> + struct fimc_isp *isp = video_drvdata(file); > >> + int ret = 0; > >> + > >> + if (mutex_lock_interruptible(&isp->video_lock)) > >> + return -ERESTARTSYS; > >> + > >> + /* ret = pm_runtime_get_sync(&isp->pdev->dev); */ > >> + if (ret< 0) > >> + goto done; > >> + > >> + ret = v4l2_fh_open(file); > >> + if (ret< 0) > >> + goto done; > >> + > >> + /* TODO: prepare video pipeline */ > >> +done: > >> + mutex_unlock(&isp->video_lock); > >> + return ret; > >> +} > >> + > >> +static int isp_video_capture_close(struct file *file) > >> +{ > >> + struct fimc_isp *isp = video_drvdata(file); > >> + int ret = 0; > >> + > >> + mutex_lock(&isp->video_lock); > >> + > >> + if (isp->out_path == FIMC_IO_DMA) { > >> + /* TODO: stop capture, cleanup */ > >> + } > >> + > >> + /* pm_runtime_put(&isp->pdev->dev); */ > >> + > >> + if (isp->ref_count == 0) > >> + vb2_queue_release(&isp->capture_vb_queue); > >> + > >> + ret = v4l2_fh_release(file); > >> + > >> + mutex_unlock(&isp->video_lock); > >> + return ret; > >> +} > >> + > >> +static unsigned int isp_video_capture_poll(struct file *file, > >> + struct poll_table_struct *wait) > >> +{ > >> + struct fimc_isp *isp = video_drvdata(file); > >> + int ret; > >> + > >> + mutex_lock(&isp->video_lock); > >> + ret = vb2_poll(&isp->capture_vb_queue, file, wait); > >> + mutex_unlock(&isp->video_lock); > >> + return ret; > >> +} > >> + > >> +static int isp_video_capture_mmap(struct file *file, struct vm_area_struct *vma) > >> +{ > >> + struct fimc_isp *isp = video_drvdata(file); > >> + int ret; > >> + > >> + if (mutex_lock_interruptible(&isp->video_lock)) > >> + return -ERESTARTSYS; > >> + > >> + ret = vb2_mmap(&isp->capture_vb_queue, vma); > >> + mutex_unlock(&isp->video_lock); > >> + > >> + return ret; > >> +} > >> + > >> +static const struct v4l2_file_operations isp_video_capture_fops = { > >> + .owner = THIS_MODULE, > >> + .open = isp_video_capture_open, > >> + .release = isp_video_capture_close, > >> + .poll = isp_video_capture_poll, > >> + .unlocked_ioctl = video_ioctl2, > >> + .mmap = isp_video_capture_mmap, > > > > Can't you use the helper functions vb2_fop_open/release/poll/mmap here? > > It seems vb2_fop_mmap/poll can be used directly, open(), release() are > a bit more complicated as some media pipeline operations need to > additionally be done within these callbacks. There is no vb2_fop_open(), > and AFAICS v4l2_fh_open() is sufficient and intended as open() helper. That's correct. Sorry for the misinformation about the non-existant vb2_fop_open. > For the next iteration I have used vb2_fop_release(), called indirectly, > as it nicely simplifies things a bit. > > BTW, shouldn't vb2_fop_release() also be taking the lock ? Actually it is > more useful for me in current form, but the drivers that directly assign > it to struct v4l2_file_operations::open might be in trouble, unless I'm > missing something. I don't see where a lock would be needed. I don't see any concurrency here. Nobody else can mess with the queue as long as they are not the owner. > > >> +}; > >> + > >> +/* > >> + * Video node ioctl operations > >> + */ > [...] > >> +static int fimc_isp_capture_streamon(struct file *file, void *priv, > >> + enum v4l2_buf_type type) > >> +{ > >> + struct fimc_isp *isp = video_drvdata(file); > >> + struct v4l2_subdev *sensor = isp->pipeline.subdevs[IDX_SENSOR]; > >> + struct fimc_pipeline *p =&isp->pipeline; > >> + int ret; > >> + > >> + /* TODO: check if the OTF interface is not running */ > >> + > >> + ret = media_entity_pipeline_start(&sensor->entity, p->m_pipeline); > >> + if (ret< 0) > >> + return ret; > >> + > >> + ret = fimc_isp_pipeline_validate(isp); > >> + if (ret) { > >> + media_entity_pipeline_stop(&sensor->entity); > >> + return ret; > >> + } > >> + > >> + return vb2_streamon(&isp->capture_vb_queue, type); > >> +} > >> + > >> +static int fimc_isp_capture_streamoff(struct file *file, void *priv, > >> + enum v4l2_buf_type type) > >> +{ > >> + struct fimc_isp *isp = video_drvdata(file); > >> + struct v4l2_subdev *sd = isp->pipeline.subdevs[IDX_SENSOR]; > >> + int ret; > >> + > >> + ret = vb2_streamoff(&isp->capture_vb_queue, type); > >> + if (ret == 0) > >> + media_entity_pipeline_stop(&sd->entity); > >> + return ret; > >> +} > >> + > >> +static int fimc_isp_capture_reqbufs(struct file *file, void *priv, > >> + struct v4l2_requestbuffers *reqbufs) > >> +{ > >> + struct fimc_isp *isp = video_drvdata(file); > >> + int ret; > >> + > >> + reqbufs->count = max_t(u32, FIMC_IS_REQ_BUFS_MIN, reqbufs->count); > >> + ret = vb2_reqbufs(&isp->capture_vb_queue, reqbufs); > > > > You probably want to call vb2_ioctl_reqbufs here since that does additional > > ownership checks that vb2_reqbufs doesn't. > > Yes, thanks for the suggestion. That was actually helpful, previously > it wasn't immediately clear to me one can still take advantage of those > vb2_ioctl_* helpers, mainly have the ownership handling in the core, > and have some handlers assigned directly to v4l2_ioctl_ops an some called > indirectly from the driver's own callbacks, should they need something > else that is done in the helpers. > > I found those helpers really useful, especially in drivers that need to > support several video nodes. Lots of boilerplate can be eliminated. And > also vb2_ops_wait_prepare/finish are a simple and nice improvement. Glad to hear! I still think there are some more improvements that could be made with some helper functions and perhaps some more fields: most (all?) drivers need a list for their active buffers, so I really think adding a struct list to vb2_buffer and a list for active buffers + a spinlock to vb2_queue would help. Helper functions could then be added to handle that queue and also to set the timestamp and sequence fields. I would need to think more about the details, but after using vb2 for a while I see a lot of shared code between the various drivers. Regards, Hans > > The same is true for vb2_ioctl_streamon/off, BTW. > > Indeed. I have already applied all possible helpers for the next iteration. > > I need to yet resolve an issue with locking order, as I previously missed > that media_entity_pipeline_start/stop() also takes the graph mutex. > > And currently the driver is supposed to take the graph mutex first and > then the video mutex. Since the link_notify callback of the media device > is called with the graph mutex already held. > > The only solution I came up so far is to provide unlocked versions of > media_entity_pipeline_start/stop(). > > Ideally using video mutex in link_notify() callback should not be needed, > but there are things done there needed for backward video device > compatibility. > > -- > > Regards, > Sylwester >
diff --git a/drivers/media/platform/s5p-fimc/Kconfig b/drivers/media/platform/s5p-fimc/Kconfig index c16b20d..1253e25 100644 --- a/drivers/media/platform/s5p-fimc/Kconfig +++ b/drivers/media/platform/s5p-fimc/Kconfig @@ -46,4 +46,17 @@ config VIDEO_EXYNOS_FIMC_LITE module will be called exynos-fimc-lite. endif +if (SOC_EXYNOS4212 || SOC_EXYNOS4412) && OF && !ARCH_MULTIPLATFORM + +config VIDEO_EXYNOS4_FIMC_IS + tristate "EXYNOS4x12 FIMC-IS (Imaging Subsystem) driver" + select VIDEOBUF2_DMA_CONTIG + help + This is a V4L2 driver for Samsung EXYNOS4x12 SoC FIMC-IS + (Imaging Subsystem). + + To compile this driver as a module, choose M here: the + module will be called exynos-fimc-is. +endif + endif # VIDEO_SAMSUNG_S5P_FIMC diff --git a/drivers/media/platform/s5p-fimc/Makefile b/drivers/media/platform/s5p-fimc/Makefile index 4648514..55b171a 100644 --- a/drivers/media/platform/s5p-fimc/Makefile +++ b/drivers/media/platform/s5p-fimc/Makefile @@ -1,7 +1,11 @@ s5p-fimc-objs := fimc-core.o fimc-reg.o fimc-m2m.o fimc-capture.o fimc-mdevice.o exynos-fimc-lite-objs += fimc-lite-reg.o fimc-lite.o +exynos-fimc-is-objs := fimc-is.o fimc-isp.o fimc-is-sensor.o fimc-is-regs.o +exynos-fimc-is-objs += fimc-is-param.o fimc-is-errno.o fimc-is-i2c.o +exynos-fimc-is-objs += fimc-isp-video.o s5p-csis-objs := mipi-csis.o obj-$(CONFIG_VIDEO_S5P_MIPI_CSIS) += s5p-csis.o obj-$(CONFIG_VIDEO_EXYNOS_FIMC_LITE) += exynos-fimc-lite.o +obj-$(CONFIG_VIDEO_EXYNOS4_FIMC_IS) += exynos-fimc-is.o obj-$(CONFIG_VIDEO_S5P_FIMC) += s5p-fimc.o diff --git a/drivers/media/platform/s5p-fimc/fimc-isp-video.c b/drivers/media/platform/s5p-fimc/fimc-isp-video.c new file mode 100644 index 0000000..bdeacaa --- /dev/null +++ b/drivers/media/platform/s5p-fimc/fimc-isp-video.c @@ -0,0 +1,414 @@ +/* + * Samsung EXYNOS4x12 FIMC-IS (Imaging Subsystem) driver + * + * Copyright (C) 2013 Samsung Electronics Co., Ltd. + * Author: Sylwester Nawrocki <s.nawrocki@samsung.com> + * + * 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. + */ + +#include <linux/device.h> +#include <linux/delay.h> +#include <linux/errno.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/types.h> +#include <linux/printk.h> +#include <linux/pm_runtime.h> +#include <linux/slab.h> +#include <linux/videodev2.h> + +#include <media/v4l2-device.h> +#include <media/v4l2-ioctl.h> +#include <media/videobuf2-core.h> +#include <media/videobuf2-dma-contig.h> + +#include "fimc-mdevice.h" +#include "fimc-core.h" +#include "fimc-is.h" + +static int isp_video_capture_start_streaming(struct vb2_queue *q, + unsigned int count) +{ + /* TODO: start ISP output DMA */ + return 0; +} + +static int isp_video_capture_stop_streaming(struct vb2_queue *q) +{ + /* TODO: stop ISP output DMA */ + return 0; +} + +static int isp_video_capture_queue_setup(struct vb2_queue *vq, + const struct v4l2_format *pfmt, + unsigned int *num_buffers, unsigned int *num_planes, + unsigned int sizes[], void *allocators[]) +{ + const struct v4l2_pix_format_mplane *pixm = NULL; + struct fimc_isp *isp = vq->drv_priv; + struct fimc_isp_frame *frame = &isp->out_frame; + const struct fimc_fmt *fmt = isp->video_capture_format; + unsigned long wh; + int i; + + if (pfmt) { + pixm = &pfmt->fmt.pix_mp; + fmt = fimc_isp_find_format(&pixm->pixelformat, NULL, -1); + wh = pixm->width * pixm->height; + } else { + wh = frame->f_width * frame->f_height; + } + + if (fmt == NULL) + return -EINVAL; + + *num_planes = fmt->memplanes; + + for (i = 0; i < fmt->memplanes; i++) { + unsigned int size = (wh * fmt->depth[i]) / 8; + if (pixm) + sizes[i] = max(size, pixm->plane_fmt[i].sizeimage); + else + sizes[i] = size; + allocators[i] = isp->alloc_ctx; + } + + return 0; +} + +static int isp_video_capture_buffer_prepare(struct vb2_buffer *vb) +{ + struct vb2_queue *vq = vb->vb2_queue; + struct fimc_isp *isp = vq->drv_priv; + int i; + + if (isp->video_capture_format == NULL) + return -EINVAL; + + for (i = 0; i < isp->video_capture_format->memplanes; i++) { + unsigned long size = isp->payload[i]; + + if (vb2_plane_size(vb, i) < size) { + v4l2_err(&isp->vfd, + "User buffer too small (%ld < %ld)\n", + vb2_plane_size(vb, i), size); + return -EINVAL; + } + vb2_set_plane_payload(vb, i, size); + } + + return 0; +} + +static void isp_video_capture_buffer_queue(struct vb2_buffer *vb) +{ + /* TODO: */ +} + +static void isp_video_lock(struct vb2_queue *vq) +{ + struct fimc_isp *isp = vb2_get_drv_priv(vq); + mutex_lock(&isp->video_lock); +} + +static void isp_video_unlock(struct vb2_queue *vq) +{ + struct fimc_isp *isp = vb2_get_drv_priv(vq); + mutex_unlock(&isp->video_lock); +} + +static const struct vb2_ops isp_video_capture_qops = { + .queue_setup = isp_video_capture_queue_setup, + .buf_prepare = isp_video_capture_buffer_prepare, + .buf_queue = isp_video_capture_buffer_queue, + .wait_prepare = isp_video_unlock, + .wait_finish = isp_video_lock, + .start_streaming = isp_video_capture_start_streaming, + .stop_streaming = isp_video_capture_stop_streaming, +}; + +static int isp_video_capture_open(struct file *file) +{ + struct fimc_isp *isp = video_drvdata(file); + int ret = 0; + + if (mutex_lock_interruptible(&isp->video_lock)) + return -ERESTARTSYS; + + /* ret = pm_runtime_get_sync(&isp->pdev->dev); */ + if (ret < 0) + goto done; + + ret = v4l2_fh_open(file); + if (ret < 0) + goto done; + + /* TODO: prepare video pipeline */ +done: + mutex_unlock(&isp->video_lock); + return ret; +} + +static int isp_video_capture_close(struct file *file) +{ + struct fimc_isp *isp = video_drvdata(file); + int ret = 0; + + mutex_lock(&isp->video_lock); + + if (isp->out_path == FIMC_IO_DMA) { + /* TODO: stop capture, cleanup */ + } + + /* pm_runtime_put(&isp->pdev->dev); */ + + if (isp->ref_count == 0) + vb2_queue_release(&isp->capture_vb_queue); + + ret = v4l2_fh_release(file); + + mutex_unlock(&isp->video_lock); + return ret; +} + +static unsigned int isp_video_capture_poll(struct file *file, + struct poll_table_struct *wait) +{ + struct fimc_isp *isp = video_drvdata(file); + int ret; + + mutex_lock(&isp->video_lock); + ret = vb2_poll(&isp->capture_vb_queue, file, wait); + mutex_unlock(&isp->video_lock); + return ret; +} + +static int isp_video_capture_mmap(struct file *file, struct vm_area_struct *vma) +{ + struct fimc_isp *isp = video_drvdata(file); + int ret; + + if (mutex_lock_interruptible(&isp->video_lock)) + return -ERESTARTSYS; + + ret = vb2_mmap(&isp->capture_vb_queue, vma); + mutex_unlock(&isp->video_lock); + + return ret; +} + +static const struct v4l2_file_operations isp_video_capture_fops = { + .owner = THIS_MODULE, + .open = isp_video_capture_open, + .release = isp_video_capture_close, + .poll = isp_video_capture_poll, + .unlocked_ioctl = video_ioctl2, + .mmap = isp_video_capture_mmap, +}; + +/* + * Video node ioctl operations + */ +static int fimc_isp_capture_querycap_capture(struct file *file, void *priv, + struct v4l2_capability *cap) +{ + + strlcpy(cap->driver, FIMC_IS_DRV_NAME, sizeof(cap->driver)); + strlcpy(cap->card, FIMC_IS_DRV_NAME, sizeof(cap->card)); + snprintf(cap->bus_info, sizeof(cap->bus_info), + "platform:exynos4x12-isp"); + + cap->device_caps = V4L2_CAP_STREAMING; + cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS; + + return 0; +} + +static int fimc_isp_capture_enum_fmt_mplane(struct file *file, void *priv, + struct v4l2_fmtdesc *f) +{ + const struct fimc_fmt *fmt; + + if (f->index >= FIMC_ISP_NUM_FORMATS) + return -EINVAL; + + fmt = fimc_isp_find_format(NULL, NULL, f->index); + if (WARN_ON(fmt == NULL)) + return -EINVAL; + + strlcpy(f->description, fmt->name, sizeof(f->description)); + f->pixelformat = fmt->fourcc; + + return 0; +} + +static int fimc_isp_capture_g_fmt_mplane(struct file *file, void *fh, + struct v4l2_format *f) +{ + /* TODO: */ + return 0; +} + +static int fimc_isp_capture_try_fmt(struct fimc_isp *isp, + struct v4l2_pix_format_mplane *pixm, + const struct fimc_fmt **ffmt) +{ + /* TODO: */ + return 0; +} + +static int fimc_isp_capture_try_fmt_mplane(struct file *file, void *fh, + struct v4l2_format *f) +{ + struct fimc_isp *isp = video_drvdata(file); + return fimc_isp_capture_try_fmt(isp, &f->fmt.pix_mp, NULL); +} + +static int fimc_isp_capture_s_fmt_mplane(struct file *file, void *priv, + struct v4l2_format *f) +{ + /* TODO: */ + return 0; +} + +static int fimc_isp_pipeline_validate(struct fimc_isp *isp) +{ + /* TODO: */ + return 0; +} + +static int fimc_isp_capture_streamon(struct file *file, void *priv, + enum v4l2_buf_type type) +{ + struct fimc_isp *isp = video_drvdata(file); + struct v4l2_subdev *sensor = isp->pipeline.subdevs[IDX_SENSOR]; + struct fimc_pipeline *p = &isp->pipeline; + int ret; + + /* TODO: check if the OTF interface is not running */ + + ret = media_entity_pipeline_start(&sensor->entity, p->m_pipeline); + if (ret < 0) + return ret; + + ret = fimc_isp_pipeline_validate(isp); + if (ret) { + media_entity_pipeline_stop(&sensor->entity); + return ret; + } + + return vb2_streamon(&isp->capture_vb_queue, type); +} + +static int fimc_isp_capture_streamoff(struct file *file, void *priv, + enum v4l2_buf_type type) +{ + struct fimc_isp *isp = video_drvdata(file); + struct v4l2_subdev *sd = isp->pipeline.subdevs[IDX_SENSOR]; + int ret; + + ret = vb2_streamoff(&isp->capture_vb_queue, type); + if (ret == 0) + media_entity_pipeline_stop(&sd->entity); + return ret; +} + +static int fimc_isp_capture_reqbufs(struct file *file, void *priv, + struct v4l2_requestbuffers *reqbufs) +{ + struct fimc_isp *isp = video_drvdata(file); + int ret; + + reqbufs->count = max_t(u32, FIMC_IS_REQ_BUFS_MIN, reqbufs->count); + ret = vb2_reqbufs(&isp->capture_vb_queue, reqbufs); + if (!ret < 0) + isp->reqbufs_count = reqbufs->count; + + return ret; +} + +static const struct v4l2_ioctl_ops isp_video_capture_ioctl_ops = { + .vidioc_querycap = fimc_isp_capture_querycap_capture, + .vidioc_enum_fmt_vid_cap_mplane = fimc_isp_capture_enum_fmt_mplane, + .vidioc_try_fmt_vid_cap_mplane = fimc_isp_capture_try_fmt_mplane, + .vidioc_s_fmt_vid_cap_mplane = fimc_isp_capture_s_fmt_mplane, + .vidioc_g_fmt_vid_cap_mplane = fimc_isp_capture_g_fmt_mplane, + .vidioc_reqbufs = fimc_isp_capture_reqbufs, + .vidioc_querybuf = vb2_ioctl_querybuf, + .vidioc_prepare_buf = vb2_ioctl_prepare_buf, + .vidioc_create_bufs = vb2_ioctl_create_bufs, + .vidioc_qbuf = vb2_ioctl_qbuf, + .vidioc_dqbuf = vb2_ioctl_dqbuf, + .vidioc_streamon = fimc_isp_capture_streamon, + .vidioc_streamoff = fimc_isp_capture_streamoff, +}; + +int fimc_isp_video_device_register(struct fimc_isp *isp, + struct v4l2_device *v4l2_dev) +{ + struct vb2_queue *q = &isp->capture_vb_queue; + struct video_device *vfd = &isp->vfd; + int ret; + + mutex_init(&isp->video_lock); + INIT_LIST_HEAD(&isp->pending_buf_q); + INIT_LIST_HEAD(&isp->active_buf_q); + + memset(vfd, 0, sizeof(*vfd)); + snprintf(vfd->name, sizeof(vfd->name), "fimc-is-isp.capture"); + + isp->video_capture_format = fimc_isp_find_format(NULL, NULL, 0); + isp->out_path = FIMC_IO_DMA; + isp->ref_count = 0; + isp->reqbufs_count = 0; + + memset(q, 0, sizeof(*q)); + q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE; + q->io_modes = VB2_MMAP; + q->ops = &isp_video_capture_qops; + q->mem_ops = &vb2_dma_contig_memops; + q->buf_struct_size = sizeof(struct flite_buffer); + q->drv_priv = isp; + q->timestamp_type = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; + + ret = vb2_queue_init(q); + if (ret < 0) + return ret; + + vfd->queue = q; + vfd->fops = &isp_video_capture_fops; + vfd->ioctl_ops = &isp_video_capture_ioctl_ops; + vfd->v4l2_dev = v4l2_dev; + vfd->minor = -1; + vfd->release = video_device_release_empty; + vfd->lock = &isp->video_lock; + + isp->vd_pad.flags = MEDIA_PAD_FL_SINK; + ret = media_entity_init(&vfd->entity, 1, &isp->vd_pad, 0); + if (ret < 0) + return ret; + + video_set_drvdata(vfd, isp); + + ret = video_register_device(vfd, VFL_TYPE_GRABBER, -1); + if (ret < 0) { + media_entity_cleanup(&vfd->entity); + return ret; + } + + v4l2_info(v4l2_dev, "Registered %s as /dev/%s\n", + vfd->name, video_device_node_name(vfd)); + + return 0; +} + +void fimc_isp_video_device_unregister(struct fimc_isp *isp) +{ + if (isp && video_is_registered(&isp->vfd)) { + video_unregister_device(&isp->vfd); + media_entity_cleanup(&isp->vfd.entity); + } +} diff --git a/drivers/media/platform/s5p-fimc/fimc-isp-video.h b/drivers/media/platform/s5p-fimc/fimc-isp-video.h new file mode 100644 index 0000000..5378dd9 --- /dev/null +++ b/drivers/media/platform/s5p-fimc/fimc-isp-video.h @@ -0,0 +1,50 @@ +/* + * Samsung EXYNOS4x12 FIMC-IS (Imaging Subsystem) driver + * + * Copyright (C) 2013 Samsung Electronics Co., Ltd. + * Sylwester Nawrocki <s.nawrocki@samsung.com> + * + * 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. + */ +#ifndef FIMC_ISP_VIDEO__ +#define FIMC_ISP_VIDEO__ + +#include <media/videobuf2-core.h> +#include "fimc-isp.h" + +int fimc_isp_video_device_register(struct fimc_isp *isp, + struct v4l2_device *v4l2_dev); +void fimc_isp_video_device_unregister(struct fimc_isp *isp); + +static inline void fimc_is_active_queue_add(struct fimc_isp *isp, + struct fimc_isp_buffer *buf) +{ + list_add_tail(&buf->list, &isp->active_buf_q); +} + +static inline struct fimc_isp_buffer *fimc_is_active_queue_pop( + struct fimc_isp *isp) +{ + struct fimc_isp_buffer *buf = list_entry(isp->active_buf_q.next, + struct fimc_isp_buffer, list); + list_del(&buf->list); + return buf; +} + +static inline void fimc_is_pending_queue_add(struct fimc_isp *isp, + struct fimc_isp_buffer *buf) +{ + list_add_tail(&buf->list, &isp->pending_buf_q); +} + +static inline struct fimc_isp_buffer *fimc_is_pending_queue_pop( + struct fimc_isp *isp) +{ + struct fimc_isp_buffer *buf = list_entry(isp->pending_buf_q.next, + struct fimc_isp_buffer, list); + list_del(&buf->list); + return buf; +} +#endif /* FIMC_ISP_VIDEO__ */