On Fri May 31 2013 15:03:25 Arun Kumar K wrote:
> FIMC-IS has two hardware scalers named as scaler-codec and
> scaler-preview. This patch adds the common code handling the
> video nodes and subdevs of both the scalers.
>
> Signed-off-by: Arun Kumar K <arun.kk@xxxxxxxxxxx>
> Signed-off-by: Kilyeon Im <kilyeon.im@xxxxxxxxxxx>
> ---
> drivers/media/platform/exynos5-is/fimc-is-scaler.c | 492 ++++++++++++++++++++
> drivers/media/platform/exynos5-is/fimc-is-scaler.h | 107 +++++
> 2 files changed, 599 insertions(+)
> create mode 100644 drivers/media/platform/exynos5-is/fimc-is-scaler.c
> create mode 100644 drivers/media/platform/exynos5-is/fimc-is-scaler.h
>
> diff --git a/drivers/media/platform/exynos5-is/fimc-is-scaler.c b/drivers/media/platform/exynos5-is/fimc-is-scaler.c
> new file mode 100644
> index 0000000..b4f3f5c
> --- /dev/null
> +++ b/drivers/media/platform/exynos5-is/fimc-is-scaler.c
> @@ -0,0 +1,492 @@
> +/*
> + * Samsung EXYNOS5250 FIMC-IS (Imaging Subsystem) driver
> + *
> + * Copyright (C) 2013 Samsung Electronics Co., Ltd.
> + * Arun Kumar K <arun.kk@xxxxxxxxxxx>
> + *
> + * 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 <media/v4l2-ioctl.h>
> +#include <media/videobuf2-dma-contig.h>
> +
> +#include "fimc-is.h"
> +
> +#define IS_SCALER_DRV_NAME "fimc-is-scaler"
> +
> +static const struct fimc_is_fmt formats[] = {
> + {
> + .name = "YUV 4:2:0 3p MultiPlanar",
> + .fourcc = V4L2_PIX_FMT_YUV420M,
> + .depth = {8, 2, 2},
> + .num_planes = 3,
> + },
> + {
> + .name = "YUV 4:2:0 2p MultiPlanar",
> + .fourcc = V4L2_PIX_FMT_NV12M,
> + .depth = {8, 4},
> + .num_planes = 2,
> + },
> + {
> + .name = "YUV 4:2:2 1p MultiPlanar",
> + .fourcc = V4L2_PIX_FMT_NV16,
> + .depth = {16},
> + .num_planes = 1,
> + },
> +};
> +#define NUM_FORMATS ARRAY_SIZE(formats)
> +
> +static struct fimc_is_fmt *find_format(struct v4l2_format *f)
> +{
> + unsigned int i;
> +
> + for (i = 0; i < NUM_FORMATS; i++) {
> + if (formats[i].fourcc == f->fmt.pix_mp.pixelformat)
> + return (struct fimc_is_fmt *) &formats[i];
> + }
> + return NULL;
> +}
> +
> +static int scaler_video_capture_start_streaming(struct vb2_queue *vq,
> + unsigned int count)
> +{
> + struct fimc_is_scaler *ctx = vb2_get_drv_priv(vq);
> + int ret;
> +
> + /* Scaler start */
> + ret = fimc_is_pipeline_scaler_start(ctx->pipeline,
> + ctx->scaler_id,
> + (unsigned int **)ctx->buf_paddr,
> + ctx->num_buffers,
> + ctx->fmt->num_planes);
> + if (ret) {
> + pr_err("Scaler start failed.\n");
> + return -EINVAL;
> + }
> +
> + set_bit(STATE_RUNNING, &ctx->capture_state);
> + return 0;
> +}
> +
> +static int scaler_video_capture_stop_streaming(struct vb2_queue *vq)
> +{
> + struct fimc_is_scaler *ctx = vb2_get_drv_priv(vq);
> + int ret;
> +
> + /* Scaler stop */
> + ret = fimc_is_pipeline_scaler_stop(ctx->pipeline, ctx->scaler_id);
> + if (ret)
> + pr_debug("Scaler already stopped.\n");
> +
> + clear_bit(STATE_RUNNING, &ctx->capture_state);
> + return 0;
> +}
> +
> +static int scaler_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[])
> +{
> + struct fimc_is_scaler *ctx = vb2_get_drv_priv(vq);
> + struct fimc_is_fmt *fmt = ctx->fmt;
> + unsigned int wh;
> + int i;
> +
> + if (!fmt)
> + return -EINVAL;
> +
> + *num_planes = fmt->num_planes;
> + wh = ctx->width * ctx->height;
> +
> + for (i = 0; i < *num_planes; i++) {
> + allocators[i] = ctx->alloc_ctx;
> + sizes[i] = (wh * fmt->depth[i]) / 8;
> + }
> + return 0;
> +}
> +
> +static int scaler_video_capture_buffer_init(struct vb2_buffer *vb)
> +{
> + struct vb2_queue *vq = vb->vb2_queue;
> + struct fimc_is_scaler *ctx = vb2_get_drv_priv(vq);
> + struct fimc_is_buf *buf;
> + struct fimc_is_fmt *fmt;
> + int i;
> +
> + buf = &ctx->capture_bufs[vb->v4l2_buf.index];
> + /* Initialize buffer */
> + buf->vb = vb;
> + fmt = ctx->fmt;
> + for (i = 0; i < fmt->num_planes; i++)
> + buf->paddr[i] = vb2_dma_contig_plane_dma_addr(vb, i);
> +
> + ctx->cap_buf_cnt++;
> + return 0;
> +}
> +
> +static void scaler_video_capture_buffer_queue(struct vb2_buffer *vb)
> +{
> + struct vb2_queue *vq = vb->vb2_queue;
> + struct fimc_is_scaler *ctx = vb2_get_drv_priv(vq);
> + struct fimc_is_buf *buf;
> +
> + buf = &ctx->capture_bufs[vb->v4l2_buf.index];
> +
> + /* Add buffer to the wait queue */
> + pr_debug("Add buffer %d in Scaler %d\n",
> + vb->v4l2_buf.index, ctx->scaler_id);
> + fimc_is_pipeline_buf_lock(ctx->pipeline);
> + fimc_is_scaler_wait_queue_add(ctx, buf);
> + fimc_is_pipeline_buf_unlock(ctx->pipeline);
> +}
> +
> +static void scaler_lock(struct vb2_queue *vq)
> +{
> + struct fimc_is_scaler *ctx = vb2_get_drv_priv(vq);
> + mutex_lock(&ctx->video_lock);
> +}
> +
> +static void scaler_unlock(struct vb2_queue *vq)
> +{
> + struct fimc_is_scaler *ctx = vb2_get_drv_priv(vq);
> + mutex_unlock(&ctx->video_lock);
> +}
> +
> +static const struct vb2_ops scaler_video_capture_qops = {
> + .queue_setup = scaler_video_capture_queue_setup,
> + .buf_init = scaler_video_capture_buffer_init,
> + .buf_queue = scaler_video_capture_buffer_queue,
> + .wait_prepare = scaler_unlock,
> + .wait_finish = scaler_lock,
> + .start_streaming = scaler_video_capture_start_streaming,
> + .stop_streaming = scaler_video_capture_stop_streaming,
> +};
> +
> +static int scaler_video_capture_open(struct file *file)
> +{
> + struct fimc_is_scaler *ctx = video_drvdata(file);
> + int ret = 0;
> +
> + /* Check if opened before */
> + if (ctx->refcount >= FIMC_IS_MAX_INSTANCES) {
> + pr_err("All instances are in use.\n");
> + return -EBUSY;
> + }
> +
> + INIT_LIST_HEAD(&ctx->wait_queue);
> + ctx->wait_queue_cnt = 0;
> + INIT_LIST_HEAD(&ctx->run_queue);
> + ctx->run_queue_cnt = 0;
> +
> + ctx->fmt = NULL;
> + ctx->refcount++;
> +
> + return ret;
> +}
> +
> +static int scaler_video_capture_close(struct file *file)
> +{
> + struct fimc_is_scaler *ctx = video_drvdata(file);
> + int ret = 0;
> +
> + ctx->refcount--;
> + ctx->capture_state = 0;
> + vb2_fop_release(file);
> +
> + return ret;
> +}
> +
> +static const struct v4l2_file_operations scaler_video_capture_fops = {
> + .owner = THIS_MODULE,
> + .open = scaler_video_capture_open,
> + .release = scaler_video_capture_close,
> + .poll = vb2_fop_poll,
> + .unlocked_ioctl = video_ioctl2,
> + .mmap = vb2_fop_mmap,
> +};
> +
> +/*
> + * Video node ioctl operations
> + */
> +static int scaler_querycap_capture(struct file *file, void *priv,
> + struct v4l2_capability *cap)
> +{
> + strncpy(cap->driver, IS_SCALER_DRV_NAME, sizeof(cap->driver) - 1);
> + strncpy(cap->card, IS_SCALER_DRV_NAME, sizeof(cap->card) - 1);
> + strncpy(cap->bus_info, IS_SCALER_DRV_NAME, sizeof(cap->bus_info) - 1);
bus_info for a platform device must be prefixed with "platform:"
> + cap->capabilities = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_CAPTURE_MPLANE;
You are missing V4L2_CAP_DEVICE_CAPS.
It's easier to write:
cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
> + cap->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_CAPTURE_MPLANE;
> + return 0;
> +}
> +
> +static int scaler_enum_fmt_mplane(struct file *file, void *priv,
> + struct v4l2_fmtdesc *f)
> +{
> + const struct fimc_is_fmt *fmt;
> +
> + if (f->index >= NUM_FORMATS)
> + return -EINVAL;
> +
> + fmt = &formats[f->index];
> + strlcpy(f->description, fmt->name, sizeof(f->description));
> + f->pixelformat = fmt->fourcc;
> + return 0;
> +}
> +
> +static int scaler_g_fmt_mplane(struct file *file, void *priv,
> + struct v4l2_format *f)
> +{
> + struct fimc_is_scaler *ctx = video_drvdata(file);
> + struct v4l2_pix_format_mplane *pixm = &f->fmt.pix_mp;
> + struct v4l2_plane_pix_format *plane_fmt = &pixm->plane_fmt[0];
> + const struct fimc_is_fmt *fmt = ctx->fmt;
> +
> + plane_fmt->bytesperline = (ctx->width * fmt->depth[0]) / 8;
> + plane_fmt->sizeimage = plane_fmt->bytesperline * ctx->height;
> +
> + pixm->num_planes = fmt->num_planes;
> + pixm->pixelformat = fmt->fourcc;
> + pixm->width = ctx->width;
> + pixm->height = ctx->height;
> + pixm->field = V4L2_FIELD_NONE;
> + pixm->colorspace = V4L2_COLORSPACE_JPEG;
priv must be zeroed: pixm->priv = 0;
> +
> + return 0;
> +}
> +
> +static int scaler_try_fmt_mplane(struct file *file, void *priv,
> + struct v4l2_format *f)
> +{
> + struct fimc_is_fmt *fmt;
> +
> + if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
> + return -EINVAL;
Not necessary, checked by the core for you.
> +
> + fmt = find_format(f);
> + if (!fmt) {
> + fmt = (struct fimc_is_fmt *) &formats[0];
> + f->fmt.pix_mp.pixelformat = fmt->fourcc;
> + }
> +
> + if (fmt->num_planes != f->fmt.pix_mp.num_planes)
> + f->fmt.pix_mp.num_planes = fmt->num_planes;
try_fmt must also set field, colorspace, priv and calculate bytesperline
and sizeimage. Note: if the DMA supports strides > width then a
bytesperline value > width * depth must be honoured.
> +
> + return 0;
> +}
> +
> +static int scaler_s_fmt_mplane(struct file *file, void *priv,
> + struct v4l2_format *f)
> +{
> + struct fimc_is_scaler *ctx = video_drvdata(file);
> + struct fimc_is_fmt *fmt;
> + int ret;
> +
> + ret = scaler_try_fmt_mplane(file, priv, f);
> + if (ret)
> + return ret;
> +
> + /* Get format type */
> + fmt = find_format(f);
> + if (!fmt) {
> + fmt = (struct fimc_is_fmt *) &formats[0];
> + f->fmt.pix_mp.pixelformat = fmt->fourcc;
> + f->fmt.pix_mp.num_planes = fmt->num_planes;
> + }
> +
> + /* Check width & height */
> + if (f->fmt.pix_mp.width > ctx->pipeline->sensor_width ||
> + f->fmt.pix_mp.height > ctx->pipeline->sensor_height) {
> + f->fmt.pix_mp.width = ctx->pipeline->sensor_width;
> + f->fmt.pix_mp.height = ctx->pipeline->sensor_height;
> + }
> +
> + /* Save values to context */
> + ctx->fmt = fmt;
> + ctx->width = f->fmt.pix_mp.width;
> + ctx->height = f->fmt.pix_mp.height;
> + ctx->pipeline->scaler_width[ctx->scaler_id] = ctx->width;
> + ctx->pipeline->scaler_height[ctx->scaler_id] = ctx->height;
> + set_bit(STATE_INIT, &ctx->capture_state);
> + return 0;
> +}
> +
> +static int scaler_reqbufs(struct file *file, void *priv,
> + struct v4l2_requestbuffers *reqbufs)
> +{
> + struct fimc_is_scaler *ctx = video_drvdata(file);
> + int ret;
> +
> + if (reqbufs->memory != V4L2_MEMORY_MMAP &&
> + reqbufs->memory != V4L2_MEMORY_DMABUF) {
> + pr_err("Memory type not supported\n");
> + return -EINVAL;
> + }
No need for this, vb2 checks this already.
> +
> + if (!ctx->fmt) {
> + pr_err("Set format not done\n");
> + return -EINVAL;
> + }
This should never happen, ctx->fmt must always be set to something.
On driver load a default format should be selected to ensure this.
> +
> + /* Check whether buffers are already allocated */
> + if (test_bit(STATE_BUFS_ALLOCATED, &ctx->capture_state)) {
> + pr_err("Buffers already allocated\n");
> + return -EINVAL;
> + }
vb2 also takes care of this: vb2_is_busy()
> +
> + ret = vb2_reqbufs(&ctx->vbq, reqbufs);
> + if (ret) {
> + pr_err("vb2 req buffers failed\n");
> + return ret;
> + }
> +
> + ctx->num_buffers = reqbufs->count;
vb2 stores this in q->num_buffers, no need to keep track of this.
> + ctx->cap_buf_cnt = 0;
> + set_bit(STATE_BUFS_ALLOCATED, &ctx->capture_state);
> + return 0;
> +}
Frankly I see no reason why you can't use vb2_ioctl_reqbufs instead.
> +
> +static const struct v4l2_ioctl_ops scaler_video_capture_ioctl_ops = {
> + .vidioc_querycap = scaler_querycap_capture,
> + .vidioc_enum_fmt_vid_cap_mplane = scaler_enum_fmt_mplane,
> + .vidioc_try_fmt_vid_cap_mplane = scaler_try_fmt_mplane,
> + .vidioc_s_fmt_vid_cap_mplane = scaler_s_fmt_mplane,
> + .vidioc_g_fmt_vid_cap_mplane = scaler_g_fmt_mplane,
> + .vidioc_reqbufs = scaler_reqbufs,
> + .vidioc_querybuf = vb2_ioctl_querybuf,
> + .vidioc_qbuf = vb2_ioctl_qbuf,
> + .vidioc_dqbuf = vb2_ioctl_dqbuf,
> + .vidioc_expbuf = vb2_ioctl_expbuf,
> + .vidioc_streamon = vb2_ioctl_streamon,
> + .vidioc_streamoff = vb2_ioctl_streamoff,
> +};
> +
> +static int scaler_subdev_registered(struct v4l2_subdev *sd)
> +{
> + struct fimc_is_scaler *ctx = v4l2_get_subdevdata(sd);
> + struct vb2_queue *q = &ctx->vbq;
> + struct video_device *vfd = &ctx->vfd;
> + int ret;
> +
> + mutex_init(&ctx->video_lock);
> +
> + memset(vfd, 0, sizeof(*vfd));
> + if (ctx->scaler_id == SCALER_SCC)
> + snprintf(vfd->name, sizeof(vfd->name), "fimc-is-scaler.codec");
> + else
> + snprintf(vfd->name, sizeof(vfd->name),
> + "fimc-is-scaler.preview");
> +
> + vfd->fops = &scaler_video_capture_fops;
> + vfd->ioctl_ops = &scaler_video_capture_ioctl_ops;
> + vfd->v4l2_dev = sd->v4l2_dev;
> + vfd->minor = -1;
No need to set this.
> + vfd->release = video_device_release_empty;
> + vfd->lock = &ctx->video_lock;
> + vfd->queue = q;
> + vfd->vfl_dir = VFL_DIR_RX;
In order to provide G/S_PRIORITY support and for supporting control events
you need to use struct v4l2_fh and set the PRIO flag in vfd->flags. See e.g.
vivi.c.
Please run the v4l2-compliance tool over any video nodes you make to check
that the driver implements everything correctly! Always use the latest version
from the v4l-utils.git repository as this utility is continuously improved.
Most if not all comments I made would have been found with that utility.
Don't leave home without it :-)
Regards,
Hans
> +
> + memset(q, 0, sizeof(*q));
> + q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
> + q->io_modes = VB2_MMAP | VB2_DMABUF;
> + q->ops = &scaler_video_capture_qops;
> + q->mem_ops = &vb2_dma_contig_memops;
> + q->drv_priv = ctx;
> +
> + ret = vb2_queue_init(q);
> + if (ret < 0)
> + return ret;
> +
> + ctx->vd_pad.flags = MEDIA_PAD_FL_SINK;
> + ret = media_entity_init(&vfd->entity, 1, &ctx->vd_pad, 0);
> + if (ret < 0)
> + return ret;
> +
> + video_set_drvdata(vfd, ctx);
> +
> + ret = video_register_device(vfd, VFL_TYPE_GRABBER, -1);
> + if (ret < 0) {
> + media_entity_cleanup(&vfd->entity);
> + return ret;
> + }
> +
> + v4l2_info(sd->v4l2_dev, "Registered %s as /dev/%s\n",
> + vfd->name, video_device_node_name(vfd));
> + return 0;
> +}
> +
> +static void scaler_subdev_unregistered(struct v4l2_subdev *sd)
> +{
> + struct fimc_is_scaler *ctx = v4l2_get_subdevdata(sd);
> +
> + if (ctx && video_is_registered(&ctx->vfd))
> + video_unregister_device(&ctx->vfd);
> +}
> +
> +static const struct v4l2_subdev_internal_ops scaler_subdev_internal_ops = {
> + .registered = scaler_subdev_registered,
> + .unregistered = scaler_subdev_unregistered,
> +};
> +
> +static struct v4l2_subdev_ops scaler_subdev_ops;
> +
> +int fimc_is_scaler_subdev_create(struct fimc_is_scaler *ctx,
> + enum fimc_is_scaler_id scaler_id,
> + struct vb2_alloc_ctx *alloc_ctx,
> + struct fimc_is_pipeline *pipeline)
> +{
> + struct v4l2_ctrl_handler *handler = &ctx->ctrl_handler;
> + struct v4l2_subdev *sd = &ctx->subdev;
> + int ret;
> +
> + /* Set context data */
> + ctx->scaler_id = scaler_id;
> + ctx->alloc_ctx = alloc_ctx;
> + ctx->pipeline = pipeline;
> + ctx->fmt = (struct fimc_is_fmt *) &formats[0];
> + ctx->refcount = 0;
> + init_waitqueue_head(&ctx->event_q);
> +
> + /* Initialize scaler subdev */
> + v4l2_subdev_init(sd, &scaler_subdev_ops);
> + sd->owner = THIS_MODULE;
> + sd->flags = V4L2_SUBDEV_FL_HAS_DEVNODE;
> + if (scaler_id == SCALER_SCC)
> + snprintf(sd->name, sizeof(sd->name), "fimc-is-scc");
> + else
> + snprintf(sd->name, sizeof(sd->name), "fimc-is-scp");
> +
> + ctx->subdev_pads[SCALER_SD_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
> + ctx->subdev_pads[SCALER_SD_PAD_SRC_FIFO].flags = MEDIA_PAD_FL_SOURCE;
> + ctx->subdev_pads[SCALER_SD_PAD_SRC_DMA].flags = MEDIA_PAD_FL_SOURCE;
> + ret = media_entity_init(&sd->entity, ISP_SD_PADS_NUM,
> + ctx->subdev_pads, 0);
> + if (ret < 0)
> + return ret;
> +
> + ret = v4l2_ctrl_handler_init(handler, 1);
> + if (handler->error)
> + goto err_ctrl;
> +
> + sd->ctrl_handler = handler;
> + sd->internal_ops = &scaler_subdev_internal_ops;
> + v4l2_set_subdevdata(sd, ctx);
> +
> + return 0;
> +err_ctrl:
> + media_entity_cleanup(&sd->entity);
> + v4l2_ctrl_handler_free(handler);
> + return ret;
> +}
> +
> +void fimc_is_scaler_subdev_destroy(struct fimc_is_scaler *ctx)
> +{
> + struct v4l2_subdev *sd = &ctx->subdev;
> +
> + v4l2_device_unregister_subdev(sd);
> + media_entity_cleanup(&sd->entity);
> + v4l2_ctrl_handler_free(&ctx->ctrl_handler);
> + v4l2_set_subdevdata(sd, NULL);
> +}
> +
> diff --git a/drivers/media/platform/exynos5-is/fimc-is-scaler.h b/drivers/media/platform/exynos5-is/fimc-is-scaler.h
> new file mode 100644
> index 0000000..115e00a
> --- /dev/null
> +++ b/drivers/media/platform/exynos5-is/fimc-is-scaler.h
> @@ -0,0 +1,107 @@
> +/*
> + * Samsung EXYNOS4x12 FIMC-IS (Imaging Subsystem) driver
> + *
> + * Copyright (C) 2013 Samsung Electronics Co., Ltd.
> + * Arun Kumar K <arun.kk@xxxxxxxxxxx>
> + *
> + * 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_IS_SCALER_H_
> +#define FIMC_IS_SCALER_H_
> +
> +#include <linux/sizes.h>
> +#include <linux/io.h>
> +#include <linux/irqreturn.h>
> +#include <linux/platform_device.h>
> +#include <linux/sched.h>
> +#include <linux/spinlock.h>
> +#include <linux/types.h>
> +#include <linux/videodev2.h>
> +
> +#include <media/media-entity.h>
> +#include <media/videobuf2-core.h>
> +#include <media/v4l2-device.h>
> +#include <media/v4l2-mediabus.h>
> +#include <media/s5p_fimc.h>
> +
> +#include "fimc-is-core.h"
> +
> +#define SCALER_SD_PAD_SINK 0
> +#define SCALER_SD_PAD_SRC_FIFO 1
> +#define SCALER_SD_PAD_SRC_DMA 2
> +#define SCALER_SD_PADS_NUM 3
> +
> +#define SCALER_MAX_BUFS 32
> +#define SCALER_MAX_PLANES 3
> +
> +/**
> + * struct fimc_is_scaler - fimc-is scaler structure
> + * @vfd: video device node
> + * @fh: v4l2 file handle
> + * @alloc_ctx: videobuf2 memory allocator context
> + * @subdev: fimc-is-scaler subdev
> + * @vd_pad: media pad for the output video node
> + * @subdev_pads: the subdev media pads
> + * @ctrl_handler: v4l2 control handler
> + * @video_lock: video lock mutex
> + * @refcount: keeps track of number of instances opened
> + * @event_q: notifies scaler events
> + * @pipeline: pipeline instance for this scaler context
> + * @scaler_id: distinguishes scaler preview or scaler codec
> + * @vbq: vb2 buffers queue for ISP output video node
> + * @wait_queue: list holding buffers waiting to be queued to HW
> + * @wait_queue_cnt: wait queue number of buffers
> + * @run_queue: list holding buffers queued to HW
> + * @run_queue_cnt: run queue number of buffers
> + * @capture_bufs: scaler capture buffers array
> + * @cap_buf_cnt: number of capture buffers in use
> + * @fmt: capture plane format for scaler
> + * @width: user configured output width
> + * @height: user configured output height
> + * @num_buffers: number of capture plane buffers in use
> + * @capture_state: state of the capture video node operations
> + * @buf_paddr: holds the physical address of capture buffers
> + */
> +struct fimc_is_scaler {
> + struct video_device vfd;
> + struct v4l2_fh fh;
> + struct vb2_alloc_ctx *alloc_ctx;
> + struct v4l2_subdev subdev;
> + struct media_pad vd_pad;
> + struct media_pad subdev_pads[SCALER_SD_PADS_NUM];
> + struct v4l2_mbus_framefmt subdev_fmt;
> + struct v4l2_ctrl_handler ctrl_handler;
> +
> + struct mutex video_lock;
> + unsigned int refcount;
> + wait_queue_head_t event_q;
> +
> + struct fimc_is_pipeline *pipeline;
> + enum fimc_is_scaler_id scaler_id;
> +
> + struct vb2_queue vbq;
> + struct list_head wait_queue;
> + unsigned int wait_queue_cnt;
> + struct list_head run_queue;
> + unsigned int run_queue_cnt;
> +
> + struct fimc_is_buf capture_bufs[SCALER_MAX_BUFS];
> + unsigned int cap_buf_cnt;
> +
> + struct fimc_is_fmt *fmt;
> + unsigned int width;
> + unsigned int height;
> + unsigned int num_buffers;
> + unsigned long capture_state;
> + unsigned int buf_paddr[SCALER_MAX_BUFS][SCALER_MAX_PLANES];
> +};
> +
> +int fimc_is_scaler_subdev_create(struct fimc_is_scaler *ctx,
> + enum fimc_is_scaler_id scaler_id,
> + struct vb2_alloc_ctx *alloc_ctx,
> + struct fimc_is_pipeline *pipeline);
> +void fimc_is_scaler_subdev_destroy(struct fimc_is_scaler *scaler);
> +
> +#endif /* FIMC_IS_SCALER_H_ */
>
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