Can you change the subject text? E.g.: 'add csc/scaler mem2mem device'. That's a lot more descriptive.
On 4/18/19 6:44 PM, Philipp Zabel wrote: > Add a single imx-media mem2mem video device that uses the IPU IC PP > (image converter post processing) task for scaling and colorspace > conversion. > On i.MX6Q/DL SoCs with two IPUs currently only the first IPU is used. > > The hardware only supports writing to destination buffers up to > 1024x1024 pixels in a single pass, arbitrary sizes can be achieved > by rendering multiple tiles per frame. > > Signed-off-by: Philipp Zabel <p.za...@pengutronix.de> > [slongerb...@gmail.com: use ipu_image_convert_adjust(), fix > device_run() error handling, add missing media-device header, > unregister and remove the mem2mem device in error paths in > imx_media_probe_complete() and in imx_media_remove()] > Signed-off-by: Steve Longerbeam <slongerb...@gmail.com> > --- > Changes since v7 [1]: > - Change capture format to keep aspect ration when changing rotation. > - Adjust output and update formats to alignment requirements, if > necessary when changing rotation or flip modes. > - Disallow changing rotation or flip modes if a format change is > required on a busy queue. > - Add sequence counting. > - Use v4l2_m2m_buf_copy_metadata. > - Disallow interlaced field modes. > - Rename video device to "ipu_ic_pp csc/scaler". > > [1] https://patchwork.linuxtv.org/patch/53968/ > --- > drivers/staging/media/imx/Kconfig | 1 + > drivers/staging/media/imx/Makefile | 1 + > .../staging/media/imx/imx-media-csc-scaler.c | 917 ++++++++++++++++++ > drivers/staging/media/imx/imx-media-dev.c | 34 +- > drivers/staging/media/imx/imx-media.h | 10 + > 5 files changed, 959 insertions(+), 4 deletions(-) > create mode 100644 drivers/staging/media/imx/imx-media-csc-scaler.c > > diff --git a/drivers/staging/media/imx/Kconfig > b/drivers/staging/media/imx/Kconfig > index f6d220b649fb..9bf14eb2154b 100644 > --- a/drivers/staging/media/imx/Kconfig > +++ b/drivers/staging/media/imx/Kconfig > @@ -6,6 +6,7 @@ config VIDEO_IMX_MEDIA > depends on HAS_DMA > select VIDEOBUF2_DMA_CONTIG > select V4L2_FWNODE > + select V4L2_MEM2MEM_DEV > help > Say yes here to enable support for video4linux media controller > driver for the i.MX5/6 SOC. > diff --git a/drivers/staging/media/imx/Makefile > b/drivers/staging/media/imx/Makefile > index d2d909a36239..0c86723f1763 100644 > --- a/drivers/staging/media/imx/Makefile > +++ b/drivers/staging/media/imx/Makefile > @@ -7,6 +7,7 @@ imx-media-ic-objs := imx-ic-common.o imx-ic-prp.o > imx-ic-prpencvf.o > obj-$(CONFIG_VIDEO_IMX_MEDIA) += imx-media.o > obj-$(CONFIG_VIDEO_IMX_MEDIA) += imx-media-common.o > obj-$(CONFIG_VIDEO_IMX_MEDIA) += imx-media-capture.o > +obj-$(CONFIG_VIDEO_IMX_MEDIA) += imx-media-csc-scaler.o > obj-$(CONFIG_VIDEO_IMX_MEDIA) += imx-media-vdic.o > obj-$(CONFIG_VIDEO_IMX_MEDIA) += imx-media-ic.o > > diff --git a/drivers/staging/media/imx/imx-media-csc-scaler.c > b/drivers/staging/media/imx/imx-media-csc-scaler.c > new file mode 100644 > index 000000000000..4a0ecdfe38e6 > --- /dev/null > +++ b/drivers/staging/media/imx/imx-media-csc-scaler.c > @@ -0,0 +1,917 @@ > +// SPDX-License-Identifier: GPL-2.0+ > +/* > + * i.MX IPUv3 IC PP mem2mem CSC/Scaler driver > + * > + * Copyright (C) 2011 Pengutronix, Sascha Hauer > + * Copyright (C) 2018 Pengutronix, Philipp Zabel > + */ > +#include <linux/module.h> > +#include <linux/delay.h> > +#include <linux/fs.h> > +#include <linux/version.h> > +#include <linux/sched.h> > +#include <linux/slab.h> > +#include <video/imx-ipu-v3.h> > +#include <video/imx-ipu-image-convert.h> > + > +#include <media/media-device.h> > +#include <media/v4l2-ctrls.h> > +#include <media/v4l2-event.h> > +#include <media/v4l2-mem2mem.h> > +#include <media/v4l2-device.h> > +#include <media/v4l2-ioctl.h> > +#include <media/videobuf2-dma-contig.h> > + > +#include "imx-media.h" > + > +#define fh_to_ctx(__fh) container_of(__fh, struct ipu_csc_scaler_ctx, > fh) > + > +enum { > + V4L2_M2M_SRC = 0, > + V4L2_M2M_DST = 1, > +}; > + > +struct ipu_csc_scaler_priv { > + struct imx_media_video_dev vdev; > + > + struct v4l2_m2m_dev *m2m_dev; > + struct device *dev; > + > + struct imx_media_dev *md; > + > + struct mutex mutex; /* mem2mem device mutex */ > +}; > + > +#define vdev_to_priv(v) container_of(v, struct ipu_csc_scaler_priv, vdev) > + > +/* Per-queue, driver-specific private data */ > +struct ipu_csc_scaler_q_data { > + struct v4l2_pix_format cur_fmt; > + struct v4l2_rect rect; > +}; > + > +struct ipu_csc_scaler_ctx { > + struct ipu_csc_scaler_priv *priv; > + > + struct v4l2_fh fh; > + struct ipu_csc_scaler_q_data q_data[2]; > + struct ipu_image_convert_ctx *icc; > + > + struct v4l2_ctrl_handler ctrl_hdlr; > + int rotate; > + bool hflip; > + bool vflip; > + enum ipu_rotate_mode rot_mode; > + unsigned int sequence; > +}; > + > +static struct ipu_csc_scaler_q_data *get_q_data(struct ipu_csc_scaler_ctx > *ctx, > + enum v4l2_buf_type type) > +{ > + if (V4L2_TYPE_IS_OUTPUT(type)) > + return &ctx->q_data[V4L2_M2M_SRC]; > + else > + return &ctx->q_data[V4L2_M2M_DST]; > +} > + > +/* > + * mem2mem callbacks > + */ > + > +static void job_abort(void *_ctx) > +{ > + struct ipu_csc_scaler_ctx *ctx = _ctx; > + > + if (ctx->icc) > + ipu_image_convert_abort(ctx->icc); > +} > + > +static void ipu_ic_pp_complete(struct ipu_image_convert_run *run, void *_ctx) > +{ > + struct ipu_csc_scaler_ctx *ctx = _ctx; > + struct ipu_csc_scaler_priv *priv = ctx->priv; > + struct vb2_v4l2_buffer *src_buf, *dst_buf; > + > + src_buf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx); > + dst_buf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx); > + > + v4l2_m2m_buf_copy_metadata(src_buf, dst_buf, true); > + > + src_buf->sequence = dst_buf->sequence = ctx->sequence++; > + > + v4l2_m2m_buf_done(src_buf, run->status ? VB2_BUF_STATE_ERROR : > + VB2_BUF_STATE_DONE); > + v4l2_m2m_buf_done(dst_buf, run->status ? VB2_BUF_STATE_ERROR : > + VB2_BUF_STATE_DONE); > + > + v4l2_m2m_job_finish(priv->m2m_dev, ctx->fh.m2m_ctx); > + kfree(run); > +} > + > +static void device_run(void *_ctx) > +{ > + struct ipu_csc_scaler_ctx *ctx = _ctx; > + struct ipu_csc_scaler_priv *priv = ctx->priv; > + struct vb2_v4l2_buffer *src_buf, *dst_buf; > + struct ipu_image_convert_run *run; > + int ret; > + > + src_buf = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx); > + dst_buf = v4l2_m2m_next_dst_buf(ctx->fh.m2m_ctx); > + > + run = kzalloc(sizeof(*run), GFP_KERNEL); > + if (!run) > + goto err; > + > + run->ctx = ctx->icc; > + run->in_phys = vb2_dma_contig_plane_dma_addr(&src_buf->vb2_buf, 0); > + run->out_phys = vb2_dma_contig_plane_dma_addr(&dst_buf->vb2_buf, 0); > + > + ret = ipu_image_convert_queue(run); > + if (ret < 0) { > + v4l2_err(ctx->priv->vdev.vfd->v4l2_dev, > + "%s: failed to queue: %d\n", __func__, ret); > + goto err; > + } > + > + return; > + > +err: > + v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx); > + v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx); > + v4l2_m2m_buf_done(src_buf, VB2_BUF_STATE_ERROR); > + v4l2_m2m_buf_done(dst_buf, VB2_BUF_STATE_ERROR); > + v4l2_m2m_job_finish(priv->m2m_dev, ctx->fh.m2m_ctx); > +} > + > +/* > + * Video ioctls > + */ > +static int ipu_csc_scaler_querycap(struct file *file, void *priv, > + struct v4l2_capability *cap) > +{ > + strscpy(cap->driver, "imx-media-csc-scaler", sizeof(cap->driver)); > + strscpy(cap->card, "imx-media-csc-scaler", sizeof(cap->card)); > + strscpy(cap->bus_info, "platform:imx-media-csc-scaler", > + sizeof(cap->bus_info)); > + > + return 0; > +} > + > +static int ipu_csc_scaler_enum_fmt(struct file *file, void *fh, > + struct v4l2_fmtdesc *f) > +{ > + u32 fourcc; > + int ret; > + > + ret = imx_media_enum_format(&fourcc, f->index, CS_SEL_ANY); > + if (ret) > + return ret; > + > + f->pixelformat = fourcc; > + > + return 0; > +} > + > +static int ipu_csc_scaler_g_fmt(struct file *file, void *priv, > + struct v4l2_format *f) > +{ > + struct ipu_csc_scaler_ctx *ctx = fh_to_ctx(priv); > + struct ipu_csc_scaler_q_data *q_data; > + > + q_data = get_q_data(ctx, f->type); > + > + f->fmt.pix = q_data->cur_fmt; > + > + return 0; > +} > + > +static int ipu_csc_scaler_try_fmt(struct file *file, void *priv, > + struct v4l2_format *f) > +{ > + struct ipu_csc_scaler_ctx *ctx = fh_to_ctx(priv); > + struct ipu_csc_scaler_q_data *q_data = get_q_data(ctx, f->type); > + struct ipu_image test_in, test_out; > + enum v4l2_field field; > + > + field = f->fmt.pix.field; > + if (field == V4L2_FIELD_ANY) > + field = V4L2_FIELD_NONE; > + else if (field != V4L2_FIELD_NONE) > + return -EINVAL; > + > + if (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) { > + struct ipu_csc_scaler_q_data *q_data_in = > + get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT); > + > + test_out.pix = f->fmt.pix; > + test_in.pix = q_data_in->cur_fmt; > + } else { > + struct ipu_csc_scaler_q_data *q_data_out = > + get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE); > + > + test_in.pix = f->fmt.pix; > + test_out.pix = q_data_out->cur_fmt; > + } > + > + ipu_image_convert_adjust(&test_in, &test_out, ctx->rot_mode); > + > + f->fmt.pix = (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) ? > + test_out.pix : test_in.pix; > + > + if (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) { > + f->fmt.pix.colorspace = q_data->cur_fmt.colorspace; > + f->fmt.pix.ycbcr_enc = q_data->cur_fmt.ycbcr_enc; > + f->fmt.pix.xfer_func = q_data->cur_fmt.xfer_func; > + f->fmt.pix.quantization = q_data->cur_fmt.quantization; > + } else if (f->fmt.pix.colorspace == V4L2_COLORSPACE_DEFAULT) { > + f->fmt.pix.colorspace = V4L2_COLORSPACE_SRGB; > + f->fmt.pix.ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT; > + f->fmt.pix.xfer_func = V4L2_XFER_FUNC_DEFAULT; > + f->fmt.pix.quantization = V4L2_QUANTIZATION_DEFAULT; > + } > + > + return 0; > +} > + > +static int ipu_csc_scaler_s_fmt(struct file *file, void *priv, > + struct v4l2_format *f) > +{ > + struct ipu_csc_scaler_q_data *q_data; > + struct ipu_csc_scaler_ctx *ctx = fh_to_ctx(priv); > + struct vb2_queue *vq; > + int ret; > + > + vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type); > + if (vb2_is_busy(vq)) { > + v4l2_err(ctx->priv->vdev.vfd->v4l2_dev, "%s: queue busy\n", > + __func__); > + return -EBUSY; > + } > + > + q_data = get_q_data(ctx, f->type); > + > + ret = ipu_csc_scaler_try_fmt(file, priv, f); > + if (ret < 0) > + return ret; > + > + q_data->cur_fmt.width = f->fmt.pix.width; > + q_data->cur_fmt.height = f->fmt.pix.height; > + q_data->cur_fmt.pixelformat = f->fmt.pix.pixelformat; > + q_data->cur_fmt.field = f->fmt.pix.field; > + q_data->cur_fmt.bytesperline = f->fmt.pix.bytesperline; > + q_data->cur_fmt.sizeimage = f->fmt.pix.sizeimage; > + > + /* Reset cropping/composing rectangle */ > + q_data->rect.left = 0; > + q_data->rect.top = 0; > + q_data->rect.width = q_data->cur_fmt.width; > + q_data->rect.height = q_data->cur_fmt.height; > + > + if (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) { > + /* Set colorimetry on the output queue */ > + q_data->cur_fmt.colorspace = f->fmt.pix.colorspace; > + q_data->cur_fmt.ycbcr_enc = f->fmt.pix.ycbcr_enc; > + q_data->cur_fmt.xfer_func = f->fmt.pix.xfer_func; > + q_data->cur_fmt.quantization = f->fmt.pix.quantization; > + /* Propagate colorimetry to the capture queue */ > + q_data = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE); > + q_data->cur_fmt.colorspace = f->fmt.pix.colorspace; > + q_data->cur_fmt.ycbcr_enc = f->fmt.pix.ycbcr_enc; > + q_data->cur_fmt.xfer_func = f->fmt.pix.xfer_func; > + q_data->cur_fmt.quantization = f->fmt.pix.quantization; > + } > + > + /* > + * TODO: Setting colorimetry on the capture queue is currently not > + * supported by the V4L2 API > + */ > + > + return 0; > +} > + > +static int ipu_csc_scaler_g_selection(struct file *file, void *priv, > + struct v4l2_selection *s) > +{ > + struct ipu_csc_scaler_ctx *ctx = fh_to_ctx(priv); > + struct ipu_csc_scaler_q_data *q_data; > + > + switch (s->target) { > + case V4L2_SEL_TGT_CROP: > + case V4L2_SEL_TGT_CROP_DEFAULT: > + case V4L2_SEL_TGT_CROP_BOUNDS: > + if (s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT) > + return -EINVAL; > + q_data = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT); > + break; > + case V4L2_SEL_TGT_COMPOSE: > + case V4L2_SEL_TGT_COMPOSE_DEFAULT: > + case V4L2_SEL_TGT_COMPOSE_BOUNDS: > + if (s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) > + return -EINVAL; > + q_data = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE); > + break; > + default: > + return -EINVAL; > + } > + > + if (s->target == V4L2_SEL_TGT_CROP || > + s->target == V4L2_SEL_TGT_COMPOSE) { > + s->r = q_data->rect; > + } else { > + s->r.left = 0; > + s->r.top = 0; > + s->r.width = q_data->cur_fmt.width; > + s->r.height = q_data->cur_fmt.height; > + } > + > + return 0; > +} > + > +static int ipu_csc_scaler_s_selection(struct file *file, void *priv, > + struct v4l2_selection *s) > +{ > + struct ipu_csc_scaler_ctx *ctx = fh_to_ctx(priv); > + struct ipu_csc_scaler_q_data *q_data; > + > + switch (s->target) { > + case V4L2_SEL_TGT_CROP:Becky Sharp - 1935 > + if (s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT) > + return -EINVAL; > + break; > + case V4L2_SEL_TGT_COMPOSE: > + if (s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) > + return -EINVAL; > + break; > + default: > + return -EINVAL; > + } > + > + if (s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE && > + s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT) > + return -EINVAL; > + > + q_data = get_q_data(ctx, s->type); > + > + /* The input's frame width to the IC must be a multiple of 8 pixels > + * When performing resizing the frame width must be multiple of burst > + * size - 8 or 16 pixels as defined by CB#_BURST_16 parameter. > + */ > + if (s->flags & V4L2_SEL_FLAG_GE) > + s->r.width = round_up(s->r.width, 8); > + if (s->flags & V4L2_SEL_FLAG_LE) > + s->r.width = round_down(s->r.width, 8); > + s->r.width = clamp_t(unsigned int, s->r.width, 8, > + round_down(q_data->cur_fmt.width, 8)); > + s->r.height = clamp_t(unsigned int, s->r.height, 1, > + q_data->cur_fmt.height); > + s->r.left = clamp_t(unsigned int, s->r.left, 0, > + q_data->cur_fmt.width - s->r.width); > + s->r.top = clamp_t(unsigned int, s->r.top, 0, > + q_data->cur_fmt.height - s->r.height); > + > + /* V4L2_SEL_FLAG_KEEP_CONFIG is only valid for subdevices */ > + q_data->rect = s->r; > + > + return 0; > +} > + > +static const struct v4l2_ioctl_ops ipu_csc_scaler_ioctl_ops = { > + .vidioc_querycap = ipu_csc_scaler_querycap, > + > + .vidioc_enum_fmt_vid_cap = ipu_csc_scaler_enum_fmt, > + .vidioc_g_fmt_vid_cap = ipu_csc_scaler_g_fmt, > + .vidioc_try_fmt_vid_cap = ipu_csc_scaler_try_fmt, > + .vidioc_s_fmt_vid_cap = ipu_csc_scaler_s_fmt, > + > + .vidioc_enum_fmt_vid_out = ipu_csc_scaler_enum_fmt, > + .vidioc_g_fmt_vid_out = ipu_csc_scaler_g_fmt, > + .vidioc_try_fmt_vid_out = ipu_csc_scaler_try_fmt, > + .vidioc_s_fmt_vid_out = ipu_csc_scaler_s_fmt, > + > + .vidioc_g_selection = ipu_csc_scaler_g_selection, > + .vidioc_s_selection = ipu_csc_scaler_s_selection, > + > + .vidioc_reqbufs = v4l2_m2m_ioctl_reqbufs, > + .vidioc_querybuf = v4l2_m2m_ioctl_querybuf, > + > + .vidioc_qbuf = v4l2_m2m_ioctl_qbuf, > + .vidioc_expbuf = v4l2_m2m_ioctl_expbuf, > + .vidioc_dqbuf = v4l2_m2m_ioctl_dqbuf, > + .vidioc_create_bufs = v4l2_m2m_ioctl_create_bufs, > + .vidioc_prepare_buf = v4l2_m2m_ioctl_prepare_buf, > + > + .vidioc_streamon = v4l2_m2m_ioctl_streamon, > + .vidioc_streamoff = v4l2_m2m_ioctl_streamoff, > + > + .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, > + .vidioc_unsubscribe_event = v4l2_event_unsubscribe, > +}; > + > +/* > + * Queue operations > + */ > + > +static int ipu_csc_scaler_queue_setup(struct vb2_queue *vq, > + unsigned int *nbuffers, > + unsigned int *nplanes, > + unsigned int sizes[], > + struct device *alloc_devs[]) > +{ > + struct ipu_csc_scaler_ctx *ctx = vb2_get_drv_priv(vq); > + struct ipu_csc_scaler_q_data *q_data; > + unsigned int size, count = *nbuffers; > + > + q_data = get_q_data(ctx, vq->type); > + > + size = q_data->cur_fmt.sizeimage; > + > + *nbuffers = count; > + > + if (*nplanes) > + return sizes[0] < size ? -EINVAL : 0; > + > + *nplanes = 1; > + sizes[0] = size; > + > + dev_dbg(ctx->priv->dev, "get %d buffer(s) of size %d each.\n", > + count, size); > + > + return 0; > +} > + > +static int ipu_csc_scaler_buf_prepare(struct vb2_buffer *vb) > +{ > + struct vb2_queue *vq = vb->vb2_queue; > + struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); > + struct ipu_csc_scaler_ctx *ctx = vb2_get_drv_priv(vq); > + struct ipu_csc_scaler_q_data *q_data; > + unsigned long size; > + > + dev_dbg(ctx->priv->dev, "type: %d\n", vq->type); > + > + if (V4L2_TYPE_IS_OUTPUT(vq->type)) { > + if (vbuf->field == V4L2_FIELD_ANY) > + vbuf->field = V4L2_FIELD_NONE; > + if (vbuf->field != V4L2_FIELD_NONE) { > + dev_dbg(ctx->priv->dev, "%s: field isn't supported\n", > + __func__); > + return -EINVAL; > + } > + } > + > + q_data = get_q_data(ctx, vq->type); > + size = q_data->cur_fmt.sizeimage; > + > + if (vb2_plane_size(vb, 0) < size) { > + dev_dbg(ctx->priv->dev, > + "%s: data will not fit into plane (%lu < %lu)\n", > + __func__, vb2_plane_size(vb, 0), size); > + return -EINVAL; > + } > + > + vb2_set_plane_payload(vb, 0, size); > + > + return 0; > +} > + > +static void ipu_csc_scaler_buf_queue(struct vb2_buffer *vb) > +{ > + struct ipu_csc_scaler_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue); > + > + v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, to_vb2_v4l2_buffer(vb)); > +} > + > +static void ipu_image_from_q_data(struct ipu_image *im, > + struct ipu_csc_scaler_q_data *q_data) > +{ > + im->pix.width = q_data->cur_fmt.width; > + im->pix.height = q_data->cur_fmt.height; > + im->pix.bytesperline = q_data->cur_fmt.bytesperline; > + im->pix.pixelformat = q_data->cur_fmt.pixelformat; > + im->rect = q_data->rect; > +} > + > +static int ipu_csc_scaler_start_streaming(struct vb2_queue *q, > + unsigned int count) > +{ > + const enum ipu_ic_task ic_task = IC_TASK_POST_PROCESSOR; > + struct ipu_csc_scaler_ctx *ctx = vb2_get_drv_priv(q); > + struct ipu_csc_scaler_priv *priv = ctx->priv; > + struct ipu_soc *ipu = priv->md->ipu[0]; > + struct ipu_csc_scaler_q_data *q_data; > + struct vb2_queue *other_q; > + struct ipu_image in, out; > + > + other_q = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, > + (q->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) ? > + V4L2_BUF_TYPE_VIDEO_OUTPUT : > + V4L2_BUF_TYPE_VIDEO_CAPTURE); > + if (!vb2_is_streaming(other_q)) > + return 0; > + > + if (ctx->icc) { > + v4l2_warn(ctx->priv->vdev.vfd->v4l2_dev, "removing old ICC\n"); > + ipu_image_convert_unprepare(ctx->icc); > + } > + > + q_data = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT); > + ipu_image_from_q_data(&in, q_data); > + > + q_data = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE); > + ipu_image_from_q_data(&out, q_data); > + > + ctx->icc = ipu_image_convert_prepare(ipu, ic_task, &in, &out, > + ctx->rot_mode, > + ipu_ic_pp_complete, ctx); > + if (IS_ERR(ctx->icc)) { > + struct vb2_v4l2_buffer *buf; > + int ret = PTR_ERR(ctx->icc); > + > + ctx->icc = NULL; > + v4l2_err(ctx->priv->vdev.vfd->v4l2_dev, "%s: error %d\n", > + __func__, ret); > + while ((buf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx))) > + v4l2_m2m_buf_done(buf, VB2_BUF_STATE_QUEUED); > + while ((buf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx))) > + v4l2_m2m_buf_done(buf, VB2_BUF_STATE_QUEUED); > + return ret; > + } > + > + return 0; > +} > + > +static void ipu_csc_scaler_stop_streaming(struct vb2_queue *q) > +{ > + struct ipu_csc_scaler_ctx *ctx = vb2_get_drv_priv(q); > + struct vb2_v4l2_buffer *buf; > + > + if (ctx->icc) { > + ipu_image_convert_unprepare(ctx->icc); > + ctx->icc = NULL; > + } > + > + ctx->sequence = 0; > + > + if (q->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) { > + while ((buf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx))) > + v4l2_m2m_buf_done(buf, VB2_BUF_STATE_ERROR); > + } else { > + while ((buf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx))) > + v4l2_m2m_buf_done(buf, VB2_BUF_STATE_ERROR); > + } > +} > + > +static const struct vb2_ops ipu_csc_scaler_qops = { > + .queue_setup = ipu_csc_scaler_queue_setup, > + .buf_prepare = ipu_csc_scaler_buf_prepare, > + .buf_queue = ipu_csc_scaler_buf_queue, > + .wait_prepare = vb2_ops_wait_prepare, > + .wait_finish = vb2_ops_wait_finish, > + .start_streaming = ipu_csc_scaler_start_streaming, > + .stop_streaming = ipu_csc_scaler_stop_streaming, > +}; > + > +static int ipu_csc_scaler_queue_init(void *priv, struct vb2_queue *src_vq, > + struct vb2_queue *dst_vq) > +{ > + struct ipu_csc_scaler_ctx *ctx = priv; > + int ret; > + > + memset(src_vq, 0, sizeof(*src_vq)); > + src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; > + src_vq->io_modes = VB2_MMAP | VB2_DMABUF; > + src_vq->drv_priv = ctx; > + src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer); > + src_vq->ops = &ipu_csc_scaler_qops; > + src_vq->mem_ops = &vb2_dma_contig_memops; > + src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY; > + src_vq->lock = &ctx->priv->mutex; > + src_vq->dev = ctx->priv->dev; > + > + ret = vb2_queue_init(src_vq); > + if (ret) > + return ret; > + > + memset(dst_vq, 0, sizeof(*dst_vq)); > + dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; > + dst_vq->io_modes = VB2_MMAP | VB2_DMABUF; > + dst_vq->drv_priv = ctx; > + dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer); > + dst_vq->ops = &ipu_csc_scaler_qops; > + dst_vq->mem_ops = &vb2_dma_contig_memops; > + dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY; > + dst_vq->lock = &ctx->priv->mutex; > + dst_vq->dev = ctx->priv->dev; > + > + return vb2_queue_init(dst_vq); > +} > + > +static int ipu_csc_scaler_s_ctrl(struct v4l2_ctrl *ctrl) > +{ > + struct ipu_csc_scaler_ctx *ctx = container_of(ctrl->handler, > + struct ipu_csc_scaler_ctx, > + ctrl_hdlr); > + enum ipu_rotate_mode rot_mode; > + int rotate; > + bool hflip, vflip; > + int ret = 0; > + > + rotate = ctx->rotate; > + hflip = ctx->hflip; > + vflip = ctx->vflip; > + > + switch (ctrl->id) { > + case V4L2_CID_HFLIP: > + hflip = ctrl->val; > + break; > + case V4L2_CID_VFLIP: > + vflip = ctrl->val; > + break; > + case V4L2_CID_ROTATE: > + rotate = ctrl->val; > + break; > + default: > + return -EINVAL; > + } > + > + ret = ipu_degrees_to_rot_mode(&rot_mode, rotate, hflip, vflip); > + if (ret) > + return ret; > + > + if (rot_mode != ctx->rot_mode) { > + struct v4l2_pix_format *in_fmt, *out_fmt; > + struct ipu_image test_in, test_out; > + > + in_fmt = &ctx->q_data[V4L2_M2M_SRC].cur_fmt; > + out_fmt = &ctx->q_data[V4L2_M2M_DST].cur_fmt; > + > + test_in.pix = *in_fmt; > + test_out.pix = *out_fmt; > + > + if (ipu_rot_mode_is_irt(rot_mode) != > + ipu_rot_mode_is_irt(ctx->rot_mode)) { > + /* Switch width and height to keep aspect ratio intact > */ > + test_out.pix.width = out_fmt->height; > + test_out.pix.height = out_fmt->width; > + } > + > + ipu_image_convert_adjust(&test_in, &test_out, ctx->rot_mode); > + > + /* Check if output format needs to be changed */ > + if (test_in.pix.width != in_fmt->width || > + test_in.pix.height != in_fmt->height || > + test_in.pix.bytesperline != in_fmt->bytesperline || > + test_in.pix.sizeimage != in_fmt->sizeimage) { > + struct vb2_queue *out_q; > + > + out_q = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, > + V4L2_BUF_TYPE_VIDEO_OUTPUT); > + if (vb2_is_busy(out_q)) > + return -EBUSY; > + } > + > + /* Check if capture format needs to be changed */ > + if (test_out.pix.width != out_fmt->width || > + test_out.pix.height != out_fmt->height || > + test_out.pix.bytesperline != out_fmt->bytesperline || > + test_out.pix.sizeimage != out_fmt->sizeimage) { > + struct vb2_queue *cap_q; > + > + cap_q = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, > + V4L2_BUF_TYPE_VIDEO_CAPTURE); > + if (vb2_is_busy(cap_q)) > + return -EBUSY; > + } > + > + *in_fmt = test_in.pix; > + *out_fmt = test_out.pix; > + > + ctx->rot_mode = rot_mode; > + ctx->rotate = rotate; > + ctx->hflip = hflip; > + ctx->vflip = vflip; > + } > + > + return 0; > +} > + > +static const struct v4l2_ctrl_ops ipu_csc_scaler_ctrl_ops = { > + .s_ctrl = ipu_csc_scaler_s_ctrl, > +}; > + > +static int ipu_csc_scaler_init_controls(struct ipu_csc_scaler_ctx *ctx) > +{ > + struct v4l2_ctrl_handler *hdlr = &ctx->ctrl_hdlr; > + > + v4l2_ctrl_handler_init(hdlr, 3); > + > + v4l2_ctrl_new_std(hdlr, &ipu_csc_scaler_ctrl_ops, V4L2_CID_HFLIP, > + 0, 1, 1, 0); > + v4l2_ctrl_new_std(hdlr, &ipu_csc_scaler_ctrl_ops, V4L2_CID_VFLIP, > + 0, 1, 1, 0); > + v4l2_ctrl_new_std(hdlr, &ipu_csc_scaler_ctrl_ops, V4L2_CID_ROTATE, > + 0, 270, 90, 0); > + > + if (hdlr->error) { > + v4l2_ctrl_handler_free(hdlr); > + return hdlr->error; > + } > + > + v4l2_ctrl_handler_setup(hdlr); > + return 0; > +} > + > +#define DEFAULT_WIDTH 720 > +#define DEFAULT_HEIGHT 576 > +static const struct ipu_csc_scaler_q_data ipu_csc_scaler_q_data_default = { > + .cur_fmt = { > + .width = DEFAULT_WIDTH, > + .height = DEFAULT_HEIGHT, > + .pixelformat = V4L2_PIX_FMT_YUV420, > + .field = V4L2_FIELD_NONE, > + .bytesperline = DEFAULT_WIDTH, > + .sizeimage = DEFAULT_WIDTH * DEFAULT_HEIGHT * 3 / 2, > + .colorspace = V4L2_COLORSPACE_SRGB, > + }, > + .rect = { > + .width = DEFAULT_WIDTH, > + .height = DEFAULT_HEIGHT, > + }, > +}; > + > +/* > + * File operations > + */ > +static int ipu_csc_scaler_open(struct file *file) > +{ > + struct ipu_csc_scaler_priv *priv = video_drvdata(file); > + struct ipu_csc_scaler_ctx *ctx = NULL; > + int ret; > + > + ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); > + if (!ctx) > + return -ENOMEM; > + > + ctx->rot_mode = IPU_ROTATE_NONE; > + > + v4l2_fh_init(&ctx->fh, video_devdata(file)); > + file->private_data = &ctx->fh; > + v4l2_fh_add(&ctx->fh); > + ctx->priv = priv; > + > + ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(priv->m2m_dev, ctx, > + &ipu_csc_scaler_queue_init); > + if (IS_ERR(ctx->fh.m2m_ctx)) { > + ret = PTR_ERR(ctx->fh.m2m_ctx); > + goto err_ctx; > + } > + > + ret = ipu_csc_scaler_init_controls(ctx); > + if (ret) > + goto err_ctrls; > + > + ctx->fh.ctrl_handler = &ctx->ctrl_hdlr; > + > + ctx->q_data[V4L2_M2M_SRC] = ipu_csc_scaler_q_data_default; > + ctx->q_data[V4L2_M2M_DST] = ipu_csc_scaler_q_data_default; > + > + dev_dbg(priv->dev, "Created instance %p, m2m_ctx: %p\n", ctx, > + ctx->fh.m2m_ctx); > + > + return 0; > + > +err_ctrls: > + v4l2_m2m_ctx_release(ctx->fh.m2m_ctx); > +err_ctx: > + v4l2_fh_del(&ctx->fh); > + v4l2_fh_exit(&ctx->fh); > + kfree(ctx); > + return ret; > +} > + > +static int ipu_csc_scaler_release(struct file *file) > +{ > + struct ipu_csc_scaler_priv *priv = video_drvdata(file); > + struct ipu_csc_scaler_ctx *ctx = fh_to_ctx(file->private_data); > + > + dev_dbg(priv->dev, "Releasing instance %p\n", ctx); > + > + v4l2_m2m_ctx_release(ctx->fh.m2m_ctx); > + v4l2_fh_del(&ctx->fh); > + v4l2_fh_exit(&ctx->fh); > + kfree(ctx); > + > + return 0; > +} > + > +static const struct v4l2_file_operations ipu_csc_scaler_fops = { > + .owner = THIS_MODULE, > + .open = ipu_csc_scaler_open, > + .release = ipu_csc_scaler_release, > + .poll = v4l2_m2m_fop_poll, > + .unlocked_ioctl = video_ioctl2, > + .mmap = v4l2_m2m_fop_mmap, > +}; > + > +static struct v4l2_m2m_ops m2m_ops = { > + .device_run = device_run, > + .job_abort = job_abort, > +}; > + > +static const struct video_device ipu_csc_scaler_videodev_template = { > + .name = "ipu_ic_pp csc/scaler", > + .fops = &ipu_csc_scaler_fops, > + .ioctl_ops = &ipu_csc_scaler_ioctl_ops, > + .minor = -1, > + .release = video_device_release, > + .vfl_dir = VFL_DIR_M2M, > + .device_caps = V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING, > +}; > + > +int imx_media_csc_scaler_device_register(struct imx_media_video_dev *vdev) > +{ > + struct ipu_csc_scaler_priv *priv = vdev_to_priv(vdev); > + struct video_device *vfd = vdev->vfd; > + int ret; > + > + vfd->v4l2_dev = &priv->md->v4l2_dev; > + > + ret = video_register_device(vfd, VFL_TYPE_GRABBER, -1); > + if (ret) { > + v4l2_err(vfd->v4l2_dev, "Failed to register video device\n"); > + return ret; > + } > + > + v4l2_info(vfd->v4l2_dev, "Registered %s as /dev/%s\n", vfd->name, > + video_device_node_name(vfd)); > + > + return 0; > +} > +EXPORT_SYMBOL_GPL(imx_media_csc_scaler_device_register); > + > +void imx_media_csc_scaler_device_unregister(struct imx_media_video_dev *vdev) > +{ > + struct ipu_csc_scaler_priv *priv = vdev_to_priv(vdev); > + struct video_device *vfd = priv->vdev.vfd; > + > + mutex_lock(&priv->mutex); > + > + if (video_is_registered(vfd)) No need for the 'if', video_unregister_device already checks if the vfd is registered. > + video_unregister_device(vfd); > + > + mutex_unlock(&priv->mutex); > +} > +EXPORT_SYMBOL_GPL(imx_media_csc_scaler_device_unregister); > + > +struct imx_media_video_dev * > +imx_media_csc_scaler_device_init(struct imx_media_dev *md) > +{ > + struct ipu_csc_scaler_priv *priv; > + struct video_device *vfd; > + int ret; > + > + priv = devm_kzalloc(md->md.dev, sizeof(*priv), GFP_KERNEL); Are you sure you can use devm_ here? It might be a good idea to test what happens when you unbind the device while streaming. At unbind time any devm_ memory is immediately freed, which can cause problems if it is still used somewhere. It might be better to release this in the video_device release function. > + if (!priv) > + return ERR_PTR(-ENOMEM); > + > + priv->md = md; > + priv->dev = md->md.dev; > + > + mutex_init(&priv->mutex); > + > + vfd = video_device_alloc(); > + if (!vfd) > + return ERR_PTR(-ENOMEM); > + > + *vfd = ipu_csc_scaler_videodev_template; > + vfd->lock = &priv->mutex; > + priv->vdev.vfd = vfd; > + > + INIT_LIST_HEAD(&priv->vdev.list); > + > + video_set_drvdata(vfd, priv); > + > + priv->m2m_dev = v4l2_m2m_init(&m2m_ops); > + if (IS_ERR(priv->m2m_dev)) { > + ret = PTR_ERR(priv->m2m_dev); > + v4l2_err(&md->v4l2_dev, "Failed to init mem2mem device: %d\n", > + ret); > + return ERR_PTR(ret); > + } > + > + return &priv->vdev; > +} > +EXPORT_SYMBOL_GPL(imx_media_csc_scaler_device_init); > + > +void imx_media_csc_scaler_device_remove(struct imx_media_video_dev *vdev) > +{ > + struct ipu_csc_scaler_priv *priv = vdev_to_priv(vdev); > + > + v4l2_m2m_release(priv->m2m_dev); > +} > +EXPORT_SYMBOL_GPL(imx_media_csc_scaler_device_remove); > + > +MODULE_DESCRIPTION("i.MX IPUv3 mem2mem scaler/CSC driver"); > +MODULE_AUTHOR("Sascha Hauer <s.ha...@pengutronix.de>"); > +MODULE_LICENSE("GPL"); > diff --git a/drivers/staging/media/imx/imx-media-dev.c > b/drivers/staging/media/imx/imx-media-dev.c > index 0a7d1d183141..4d2078d18a48 100644 > --- a/drivers/staging/media/imx/imx-media-dev.c > +++ b/drivers/staging/media/imx/imx-media-dev.c > @@ -323,12 +323,36 @@ int imx_media_probe_complete(struct v4l2_async_notifier > *notifier) > goto unlock; > > ret = v4l2_device_register_subdev_nodes(&imxmd->v4l2_dev); > -unlock: > - mutex_unlock(&imxmd->mutex); > if (ret) > - return ret; > + goto unlock; > + > + imxmd->m2m_vdev = imx_media_csc_scaler_device_init(imxmd); > + if (IS_ERR(imxmd->m2m_vdev)) { > + ret = PTR_ERR(imxmd->m2m_vdev); > + goto unlock; > + } > > - return media_device_register(&imxmd->md); > + ret = imx_media_csc_scaler_device_register(imxmd->m2m_vdev); > + if (ret) > + goto m2m_remove; > + > + mutex_unlock(&imxmd->mutex); > + > + ret = media_device_register(&imxmd->md); > + if (ret) { > + mutex_lock(&imxmd->mutex); > + goto m2m_unreg; > + } > + > + return 0; > + > +m2m_unreg: > + imx_media_csc_scaler_device_unregister(imxmd->m2m_vdev); > +m2m_remove: > + imx_media_csc_scaler_device_remove(imxmd->m2m_vdev); > +unlock: > + mutex_unlock(&imxmd->mutex); > + return ret; > } > > /* > @@ -504,6 +528,8 @@ static int imx_media_remove(struct platform_device *pdev) > v4l2_async_notifier_unregister(&imxmd->notifier); > imx_media_remove_ipu_internal_subdevs(imxmd); > v4l2_async_notifier_cleanup(&imxmd->notifier); > + imx_media_csc_scaler_device_unregister(imxmd->m2m_vdev); > + imx_media_csc_scaler_device_remove(imxmd->m2m_vdev); > media_device_unregister(&imxmd->md); > v4l2_device_unregister(&imxmd->v4l2_dev); > media_device_cleanup(&imxmd->md); > diff --git a/drivers/staging/media/imx/imx-media.h > b/drivers/staging/media/imx/imx-media.h > index dd603a6b3a70..1894553b4497 100644 > --- a/drivers/staging/media/imx/imx-media.h > +++ b/drivers/staging/media/imx/imx-media.h > @@ -151,6 +151,9 @@ struct imx_media_dev { > > /* for async subdev registration */ > struct v4l2_async_notifier notifier; > + > + /* IC scaler/CSC mem2mem video device */ > + struct imx_media_video_dev *m2m_vdev; > }; > > enum codespace_sel { > @@ -281,6 +284,13 @@ void imx_media_capture_device_set_format(struct > imx_media_video_dev *vdev, > const struct v4l2_rect *compose); > void imx_media_capture_device_error(struct imx_media_video_dev *vdev); > > +/* imx-media-mem2mem.c */ > +struct imx_media_video_dev * > +imx_media_csc_scaler_device_init(struct imx_media_dev *dev); > +void imx_media_csc_scaler_device_remove(struct imx_media_video_dev *vdev); > +int imx_media_csc_scaler_device_register(struct imx_media_video_dev *vdev); > +void imx_media_csc_scaler_device_unregister(struct imx_media_video_dev > *vdev); > + > /* subdev group ids */ > #define IMX_MEDIA_GRP_ID_CSI2 BIT(8) > #define IMX_MEDIA_GRP_ID_CSI BIT(9) > Otherwise this looks very good and I plan to merge v9 unless something unexpected crops up. Regards, Hans
