[PATCH 5/5] [media] imx-ipu: Add i.MX IPUv3 scaler driver
Kamil Debski
k.debski at samsung.com
Fri Apr 10 07:22:05 PDT 2015
From: linux-media-owner at vger.kernel.org [mailto:linux-media-
owner at vger.kernel.org] On Behalf Of Philipp Zabel
Sent: Tuesday, March 17, 2015 4:48 PM
>
> From: Sascha Hauer <s.hauer at pengutronix.de>
>
> This patch adds support for hardware accelerated scaling and color
> space conversion between memory buffers using the IPUv3 IC.
> Since the maximum output size of the IC unit is 1024x1024 pixels,
> multiple IC tasks with overlapping tiles are used internally to scale
> and convert larger frames.
>
> The IC operates with a burst size of at least 8 pixels. Depending on
> the frame width and scaling factor, up to 7 junk pixels may be written
> after the end of the frame. The sizeimage is increased accordingly.
>
> Signed-off-by: Sascha Hauer <s.hauer at pengutronix.de>
> Signed-off-by: Michael Olbrich <m.olbrich at pengutronix.de>
> Signed-off-by: Philipp Zabel <p.zabel at pengutronix.de>
Acked-by: Kamil Debski <k.debski at samsung.com>
> ---
> drivers/gpu/ipu-v3/ipu-ic.c | 28 +-
> drivers/media/platform/imx/Kconfig | 9 +
> drivers/media/platform/imx/Makefile | 1 +
> drivers/media/platform/imx/imx-ipu-scaler.c | 869
> ++++++++++++++++++++++++++++
> drivers/media/platform/imx/imx-ipu.c | 2 +-
> drivers/media/platform/imx/imx-ipu.h | 1 +
> 6 files changed, 882 insertions(+), 28 deletions(-) create mode
> 100644 drivers/media/platform/imx/imx-ipu-scaler.c
>
> diff --git a/drivers/gpu/ipu-v3/ipu-ic.c b/drivers/gpu/ipu-v3/ipu-ic.c
> index 39ee388..984f68f 100644
> --- a/drivers/gpu/ipu-v3/ipu-ic.c
> +++ b/drivers/gpu/ipu-v3/ipu-ic.c
> @@ -701,7 +701,6 @@ static struct image_convert_ctx
> *ipu_image_convert_next(struct ipu_ic *ic) {
> struct ipu_ic_priv *priv = ic->priv;
> struct ipuv3_channel *ch_in = ic->input_channel;
> - struct ipuv3_channel *ch_in_p, *ch_in_n;
> struct ipuv3_channel *ch_out = ic->output_channel;
> struct image_convert_ctx *ctx;
> struct ipu_image *in_p, *in, *in_n;
> @@ -748,32 +747,7 @@ static struct image_convert_ctx
> *ipu_image_convert_next(struct ipu_ic *ic)
> ipu_cpmem_set_burstsize(ch_in, inburst);
> ipu_cpmem_set_burstsize(ch_out, outburst);
>
> - if (ctx->deinterlace) {
> - ch_in_p = ic->input_channel_p;
> - ch_in_n = ic->input_channel_n;
> -
> - ipu_cpmem_zero(ch_in_p);
> - ipu_cpmem_zero(ch_in_n);
> -
> - ipu_ic_task_idma_init(ic, ic->input_channel_p,
> - in_p->rect.width, in_p->rect.height,
> - inburst, IPU_ROTATE_NONE);
> - ipu_ic_task_idma_init(ic, ic->input_channel_n,
> - in_n->rect.width, in_n->rect.height,
> - inburst, IPU_ROTATE_NONE);
> -
> - ipu_cpmem_set_image(ch_in_p, &ctx->in_p);
> - ipu_cpmem_set_image(ch_in_n, &ctx->in_n);
> -
> - ipu_cpmem_set_burstsize(ch_in_p, inburst);
> - ipu_cpmem_set_burstsize(ch_in_n, inburst);
> - }
> -
> -
> - if (ctx->deinterlace)
> - in_height = in->rect.height * 2;
> - else
> - in_height = in->rect.height;
> + in_height = in->rect.height;
>
> dev_dbg(priv->ipu->dev, "%s: %dx%d(%dx%d@%d,%d) -
> > %dx%d(%dx%d@%d,%d)\n",
> __func__, in->pix.width, in->pix.height, diff --git
> a/drivers/media/platform/imx/Kconfig
> b/drivers/media/platform/imx/Kconfig
> index a90c973..4694367 100644
> --- a/drivers/media/platform/imx/Kconfig
> +++ b/drivers/media/platform/imx/Kconfig
> @@ -1,2 +1,11 @@
> config VIDEO_IMX_IPU_COMMON
> tristate
> +
> +config VIDEO_IMX_IPU_SCALER
> + tristate "i.MX5/6 IPUv3 based image scaler driver"
> + depends on VIDEO_DEV && IMX_IPUV3_CORE
> + select VIDEOBUF2_DMA_CONTIG
> + select VIDEO_IMX_IPU_COMMON
> + select V4L2_MEM2MEM_DEV
> + ---help---
> + This is a v4l2 scaler video driver for the IPUv3 on i.MX5/6.
> diff --git a/drivers/media/platform/imx/Makefile
> b/drivers/media/platform/imx/Makefile
> index 5de119c..f20aa0b 100644
> --- a/drivers/media/platform/imx/Makefile
> +++ b/drivers/media/platform/imx/Makefile
> @@ -1 +1,2 @@
> obj-$(CONFIG_VIDEO_IMX_IPU_COMMON) += imx-ipu.o
> +obj-$(CONFIG_VIDEO_IMX_IPU_SCALER) += imx-ipu-scaler.o
> diff --git a/drivers/media/platform/imx/imx-ipu-scaler.c
> b/drivers/media/platform/imx/imx-ipu-scaler.c
> new file mode 100644
> index 0000000..9cf8a70
> --- /dev/null
> +++ b/drivers/media/platform/imx/imx-ipu-scaler.c
> @@ -0,0 +1,869 @@
> +/*
> + * i.MX IPUv3 scaler driver
> + *
> + * Copyright (C) 2011 Sascha Hauer, Pengutronix
> + *
> + * based on the mem2mem test driver
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU General Public License
> + * as published by the Free Software Foundation; either version 2
> + * of the License, or (at your option) any later version.
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + */
> +#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 <linux/platform_device.h>
> +#include <media/v4l2-mem2mem.h>
> +#include <media/v4l2-device.h>
> +#include <media/v4l2-ioctl.h>
> +#include <media/videobuf2-dma-contig.h>
> +
> +#include "imx-ipu.h"
> +
> +#define MIN_W 32
> +#define MIN_H 32
> +#define MAX_W 4096
> +#define MAX_H 4096
> +#define DIM_ALIGN_MASK 0x08 /* 8-alignment for dimensions */
> +
> +/* Flags that indicate a format can be used for capture/output */
> +#define MEM2MEM_CAPTURE (1 << 0)
> +#define MEM2MEM_OUTPUT (1 << 1)
> +
> +#define MEM2MEM_NAME "imx-ipuv3-scale"
> +
> +/* Per queue */
> +#define MEM2MEM_DEF_NUM_BUFS VIDEO_MAX_FRAME
> +/* In bytes, per queue */
> +#define MEM2MEM_VID_MEM_LIMIT (64 * 1024 * 1024)
> +
> +#define fh_to_ctx(__fh) container_of(__fh, struct ipu_scale_ctx,
> fh)
> +
> +enum {
> + V4L2_M2M_SRC = 0,
> + V4L2_M2M_DST = 1,
> +};
> +
> +struct ipu_scale_dev {
> + struct v4l2_device v4l2_dev;
> + struct video_device *vfd;
> + struct device *dev;
> + struct ipu_soc *ipu;
> +
> + atomic_t num_inst;
> + spinlock_t irqlock;
> +
> + struct v4l2_m2m_dev *m2m_dev;
> + struct mutex dev_mutex;
> +};
> +
> +/* Per-queue, driver-specific private data */ struct ipu_scale_q_data
> {
> + struct v4l2_pix_format cur_fmt;
> + struct v4l2_rect rect;
> +};
> +
> +struct ipu_scale_ctx {
> + struct ipu_scale_dev *ipu_scaler;
> +
> + struct v4l2_fh fh;
> + struct vb2_alloc_ctx *alloc_ctx;
> + struct ipu_scale_q_data q_data[2];
> + struct work_struct work;
> + struct completion completion;
> + struct work_struct skip_run;
> + int error;
> + int aborting;
> + enum ipu_image_scale_ctrl ctrl;
> + struct image_convert_ctx *icc;
> + int num_tiles;
> +};
> +
> +static struct ipu_scale_q_data *get_q_data(struct ipu_scale_ctx *ctx,
> + enum v4l2_buf_type type)
> +{
> + switch (type) {
> + case V4L2_BUF_TYPE_VIDEO_OUTPUT:
> + return &ctx->q_data[V4L2_M2M_SRC];
> + case V4L2_BUF_TYPE_VIDEO_CAPTURE:
> + return &ctx->q_data[V4L2_M2M_DST];
> + default:
> + BUG();
> + }
> + return NULL;
> +}
> +
> +/*
> + * mem2mem callbacks
> + */
> +
> +/**
> + * job_ready() - check whether an instance is ready to be scheduled to
> +run */ static int job_ready(void *priv) {
> + struct ipu_scale_ctx *ctx = priv;
> +
> + if (ctx->aborting)
> + return 0;
> +
> + if (v4l2_m2m_num_src_bufs_ready(ctx->fh.m2m_ctx) < 1
> + || v4l2_m2m_num_dst_bufs_ready(ctx->fh.m2m_ctx) < 1) {
> + dev_dbg(ctx->ipu_scaler->dev, "Not enough buffers
> available\n");
> + return 0;
> + }
> +
> + return 1;
> +}
> +
> +static void job_abort(void *priv)
> +{
> + struct ipu_scale_ctx *ctx = priv;
> +
> + ctx->aborting = 1;
> +}
> +
> +static void ipu_complete(void *priv, int err) {
> + struct ipu_scale_dev *ipu_scaler = priv;
> + struct ipu_scale_ctx *curr_ctx;
> +
> + curr_ctx = v4l2_m2m_get_curr_priv(ipu_scaler->m2m_dev);
> +
> + if (NULL == curr_ctx) {
> + dev_dbg(ipu_scaler->dev,
> + "Instance released before the end of
transaction\n");
> + return;
> + }
> +
> + curr_ctx->error = err;
> + complete(&curr_ctx->completion);
> +}
> +
> +static void device_run(void *priv)
> +{
> + struct ipu_scale_ctx *ctx = priv;
> +
> + schedule_work(&ctx->work);
> +}
> +
> +static void ipu_scaler_work(struct work_struct *work) {
> + struct ipu_scale_ctx *ctx = container_of(work, struct
> ipu_scale_ctx,
> + work);
> + struct ipu_scale_dev *ipu_scaler = ctx->ipu_scaler;
> + struct vb2_buffer *src_buf, *dst_buf;
> + struct ipu_scale_q_data *q_data;
> + struct v4l2_pix_format *pix;
> + struct ipu_image in, out;
> + int err = -ETIMEDOUT;
> + unsigned long flags;
> +
> + /*
> + * If streamoff dequeued all buffers before we could get the lock,
> + * just bail out immediately.
> + */
> + if (!v4l2_m2m_num_src_bufs_ready(ctx->fh.m2m_ctx) ||
> + !v4l2_m2m_num_dst_bufs_ready(ctx->fh.m2m_ctx)) {
> + WARN_ON(1);
> + schedule_work(&ctx->skip_run);
> + return;
> + }
> +
> + src_buf = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx);
> + dst_buf = v4l2_m2m_next_dst_buf(ctx->fh.m2m_ctx);
> +
> + in.phys0 = vb2_dma_contig_plane_dma_addr(src_buf, 0);
> + out.phys0 = vb2_dma_contig_plane_dma_addr(dst_buf, 0);
> +
> + if (!ctx->num_tiles) {
> + q_data = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT);
> + pix = &q_data->cur_fmt;
> +
> + in.pix.width = pix->width;
> + in.pix.height = pix->height;
> + in.pix.bytesperline = pix->bytesperline;
> + in.pix.pixelformat = pix->pixelformat;
> + in.rect = q_data->rect;
> +
> + q_data = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE);
> + pix = &q_data->cur_fmt;
> +
> + out.pix.width = pix->width;
> + out.pix.height = pix->height;
> + out.pix.bytesperline = pix->bytesperline;
> + out.pix.pixelformat = pix->pixelformat;
> + out.rect = q_data->rect;
> +
> + kfree(ctx->icc);
> + ctx->icc = ipu_image_convert_prepare(ipu_scaler->ipu, &in,
> + &out, ctx->ctrl,
> + &ctx->num_tiles);
> + if (IS_ERR(ctx->icc)) {
> + schedule_work(&ctx->skip_run);
> + return;
> + }
> + }
> +
> + ipu_image_convert_run(ipu_scaler->ipu, &in, &out, ctx->icc,
> + ctx->num_tiles, ipu_complete, ipu_scaler,
> false);
> +
> + if (!wait_for_completion_timeout(&ctx->completion,
> + msecs_to_jiffies(300))) {
> + dev_err(ipu_scaler->dev,
> + "Timeout waiting for scaling result\n");
> + err = -ETIMEDOUT;
> + } else {
> + err = ctx->error;
> + }
> +
> + src_buf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
> + dst_buf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
> +
> + dst_buf->v4l2_buf.timestamp = src_buf->v4l2_buf.timestamp;
> + dst_buf->v4l2_buf.timecode = src_buf->v4l2_buf.timecode;
> +
> + spin_lock_irqsave(&ipu_scaler->irqlock, flags);
> + v4l2_m2m_buf_done(src_buf, err ? VB2_BUF_STATE_ERROR :
> + VB2_BUF_STATE_DONE);
> + v4l2_m2m_buf_done(dst_buf, err ? VB2_BUF_STATE_ERROR :
> + VB2_BUF_STATE_DONE);
> + spin_unlock_irqrestore(&ipu_scaler->irqlock, flags);
> +
> + v4l2_m2m_job_finish(ipu_scaler->m2m_dev, ctx->fh.m2m_ctx); }
> +
> +/*
> + * video ioctls
> + */
> +static int vidioc_querycap(struct file *file, void *priv,
> + struct v4l2_capability *cap)
> +{
> + strncpy(cap->driver, MEM2MEM_NAME, sizeof(cap->driver) - 1);
> + strncpy(cap->card, MEM2MEM_NAME, sizeof(cap->card) - 1);
> + strncpy(cap->bus_info, "platform:" MEM2MEM_NAME,
> + sizeof(cap->bus_info) - 1);
> + /*
> + * This is only a mem-to-mem video device. The capture and output
> + * device capability flags are left for backward compatibility
> and
> + * are scheduled for removal.
> + */
> + cap->device_caps = V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING;
> + cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
> +
> + return 0;
> +}
> +
> +static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
> + struct v4l2_fmtdesc *f)
> +{
> + return ipu_enum_fmt(file, priv, f);
> +}
> +
> +static int vidioc_enum_fmt_vid_out(struct file *file, void *priv,
> + struct v4l2_fmtdesc *f)
> +{
> + return ipu_enum_fmt(file, priv, f);
> +}
> +
> +static int vidioc_g_fmt(struct ipu_scale_ctx *ctx, struct v4l2_format
> +*f) {
> + struct vb2_queue *vq;
> + struct ipu_scale_q_data *q_data;
> + struct v4l2_pix_format *pix;
> +
> + vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
> + if (!vq)
> + return -EINVAL;
> +
> + q_data = get_q_data(ctx, f->type);
> + pix = &q_data->cur_fmt;
> +
> + return ipu_g_fmt(f, pix);
> +}
> +
> +static int vidioc_g_fmt_vid_out(struct file *file, void *priv,
> + struct v4l2_format *f)
> +{
> + return vidioc_g_fmt(priv, f);
> +}
> +
> +static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
> + struct v4l2_format *f)
> +{
> + return vidioc_g_fmt(priv, f);
> +}
> +
> +static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
> + struct v4l2_format *f)
> +{
> + int ret;
> +
> + ret = ipu_try_fmt(file, priv, f);
> +
> + /*
> + * Leave enough output space for worst-case overhead caused by 8
> pixel
> + * burst size: 7 RGBA pixels.
> + */
> + f->fmt.pix.sizeimage += 7 * 4;
> +
> + return ret;
> +}
> +
> +static int vidioc_try_fmt_vid_out(struct file *file, void *priv,
> + struct v4l2_format *f)
> +{
> + f->fmt.pix.width &= ~0x7;
> + return ipu_try_fmt(file, priv, f);
> +}
> +
> +static int vidioc_s_fmt(struct file *file, void *priv,
> + struct v4l2_format *f)
> +{
> + struct ipu_scale_q_data *q_data;
> + struct vb2_queue *vq;
> + struct ipu_scale_ctx *ctx = fh_to_ctx(priv);
> + int ret;
> +
> + vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
> + if (!vq)
> + return -EINVAL;
> +
> + q_data = get_q_data(ctx, f->type);
> + if (!q_data)
> + return -EINVAL;
> +
> + if (vb2_is_busy(vq)) {
> + v4l2_err(&ctx->ipu_scaler->v4l2_dev, "%s queue busy\n",
> + __func__);
> + return -EBUSY;
> + }
> +
> + ret = ipu_s_fmt(file, priv, f, &q_data->cur_fmt);
> + if (ret < 0)
> + return ret;
> +
> + /*
> + * Leave enough output space for worst-case overhead caused by 8
> pixel
> + * burst size: 7 RGBA pixels.
> + */
> + q_data->cur_fmt.sizeimage = f->fmt.pix.sizeimage;
> + if (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
> + f->fmt.pix.sizeimage += 7 * 4;
> +
> + /* 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;
> +
> + /* reset scaling ctrl */
> + ctx->ctrl = IPU_IMAGE_SCALE_PIXELPERFECT;
> +
> + return 0;
> +}
> +
> +static int vidioc_g_selection(struct file *file, void *priv,
> + struct v4l2_selection *s)
> +{
> + struct ipu_scale_ctx *ctx = fh_to_ctx(priv);
> + struct ipu_scale_q_data *q_data;
> +
> + switch (s->target) {
> + case V4L2_SEL_TGT_CROP:
> + if (s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
> + return -EINVAL;
> + q_data = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT);
> + s->r.left = 0;
> + s->r.top = 0;
> + s->r.width = q_data->cur_fmt.width;
> + s->r.height = q_data->cur_fmt.height;
> + break;
> + 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);
> + s->r.left = 0;
> + s->r.top = 0;
> + s->r.width = q_data->cur_fmt.width;
> + s->r.height = q_data->cur_fmt.height;
> + break;
> + case V4L2_SEL_TGT_COMPOSE:
> + if (s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
> + return -EINVAL;
> + q_data = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE);
> + s->r = q_data->rect;
> + break;
> + case V4L2_SEL_TGT_COMPOSE_DEFAULT:
> + case V4L2_SEL_TGT_COMPOSE_BOUNDS:
> + case V4L2_SEL_TGT_COMPOSE_PADDED:
> + if (s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
> + return -EINVAL;
> + q_data = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE);
> + s->r.left = 0;
> + s->r.top = 0;
> + s->r.width = q_data->cur_fmt.width;
> + s->r.height = q_data->cur_fmt.height;
> + break;
> + }
> +
> + return 0;
> +}
> +
> +static int vidioc_s_selection(struct file *file, void *priv,
> + struct v4l2_selection *s)
> +{
> + struct ipu_scale_ctx *ctx = fh_to_ctx(priv);
> + struct ipu_scale_q_data *q_data;
> +
> + switch (s->target) {
> + case V4L2_SEL_TGT_CROP:
> + 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;
> + ctx->ctrl = IPU_IMAGE_SCALE_ROUND_DOWN;
> + break;
> + default:
> + 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;
> + ctx->num_tiles = 0;
> +
> + return 0;
> +}
> +
> +static int vidioc_enum_framesizes(struct file *file, void *fh,
> + struct v4l2_frmsizeenum *fsize)
> +{
> + return ipu_enum_framesizes(file, fh, fsize); }
> +
> +static const struct v4l2_ioctl_ops ipu_scale_ioctl_ops = {
> + .vidioc_querycap = vidioc_querycap,
> +
> + .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
> + .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
> + .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
> + .vidioc_s_fmt_vid_cap = vidioc_s_fmt,
> +
> + .vidioc_enum_fmt_vid_out = vidioc_enum_fmt_vid_out,
> + .vidioc_g_fmt_vid_out = vidioc_g_fmt_vid_out,
> + .vidioc_try_fmt_vid_out = vidioc_try_fmt_vid_out,
> + .vidioc_s_fmt_vid_out = vidioc_s_fmt,
> +
> + .vidioc_g_selection = vidioc_g_selection,
> + .vidioc_s_selection = vidioc_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_streamon = v4l2_m2m_ioctl_streamon,
> + .vidioc_streamoff = v4l2_m2m_ioctl_streamoff,
> +
> + .vidioc_enum_framesizes = vidioc_enum_framesizes, };
> +
> +static void ipu_scale_skip_run(struct work_struct *work) {
> + struct ipu_scale_ctx *ctx = container_of(work, struct
> ipu_scale_ctx,
> + skip_run);
> +
> + v4l2_m2m_job_finish(ctx->ipu_scaler->m2m_dev, ctx->fh.m2m_ctx); }
> +
> +
> +/*
> + * Queue operations
> + */
> +
> +static int ipu_scale_queue_setup(struct vb2_queue *vq,
> + const struct v4l2_format *fmt,
> + unsigned int *nbuffers,
> + unsigned int *nplanes, unsigned int sizes[],
> + void *alloc_ctxs[])
> +{
> + struct ipu_scale_ctx *ctx = vb2_get_drv_priv(vq);
> + struct ipu_scale_q_data *q_data;
> + unsigned int size, count = *nbuffers;
> + struct v4l2_pix_format *pix;
> +
> + q_data = get_q_data(ctx, vq->type);
> + pix = &q_data->cur_fmt;
> +
> + size = pix->sizeimage;
> + /*
> + * Leave enough output space for worst-case overhead caused by 8
> pixel
> + * burst size: 7 RGBA pixels.
> + */
> + if (vq->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
> + size += 7 * 4;
> +
> + while (size * count > MEM2MEM_VID_MEM_LIMIT)
> + (count)--;
> +
> + *nplanes = 1;
> + *nbuffers = count;
> + sizes[0] = size;
> +
> + ctx->alloc_ctx = vb2_dma_contig_init_ctx(ctx->ipu_scaler->dev);
> + if (IS_ERR(ctx->alloc_ctx))
> + return PTR_ERR(ctx->alloc_ctx);
> +
> + alloc_ctxs[0] = ctx->alloc_ctx;
> +
> + dev_dbg(ctx->ipu_scaler->dev, "get %d buffer(s) of size %d
> each.\n",
> + count, size);
> +
> + return 0;
> +}
> +
> +static int ipu_scale_buf_prepare(struct vb2_buffer *vb) {
> + struct ipu_scale_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
> + struct ipu_scale_q_data *q_data;
> + struct v4l2_pix_format *pix;
> + unsigned int plane_size;
> +
> + dev_dbg(ctx->ipu_scaler->dev, "type: %d\n", vb->vb2_queue->type);
> +
> + q_data = get_q_data(ctx, vb->vb2_queue->type);
> + pix = &q_data->cur_fmt;
> + plane_size = pix->sizeimage;
> +
> + /*
> + * Leave enough output space for worst-case overhead caused by 8
> pixel
> + * burst size: 7 RGBA pixels.
> + */
> + if (vb->vb2_queue->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
> + plane_size += 7 * 4;
> + if (vb2_plane_size(vb, 0) < plane_size) {
> + dev_dbg(ctx->ipu_scaler->dev,
> + "%s data will not fit into plane (%lu <
%lu)\n",
> + __func__, vb2_plane_size(vb, 0),
> + (long)plane_size);
> + return -EINVAL;
> + }
> +
> + vb2_set_plane_payload(vb, 0, pix->sizeimage);
> +
> + return 0;
> +}
> +
> +static void ipu_scale_buf_queue(struct vb2_buffer *vb) {
> + struct ipu_scale_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
> +
> + v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vb); }
> +
> +static void ipu_scale_stop_streaming(struct vb2_queue *q) {
> + struct ipu_scale_ctx *ctx = vb2_get_drv_priv(q);
> + struct vb2_buffer *buf;
> +
> + 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 struct vb2_ops ipu_scale_qops = {
> + .queue_setup = ipu_scale_queue_setup,
> + .buf_prepare = ipu_scale_buf_prepare,
> + .buf_queue = ipu_scale_buf_queue,
> + .wait_prepare = vb2_ops_wait_prepare,
> + .wait_finish = vb2_ops_wait_finish,
> + .stop_streaming = ipu_scale_stop_streaming, };
> +
> +static int queue_init(void *priv, struct vb2_queue *src_vq,
> + struct vb2_queue *dst_vq)
> +{
> + struct ipu_scale_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_USERPTR | VB2_DMABUF;
> + src_vq->drv_priv = ctx;
> + src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
> + src_vq->ops = &ipu_scale_qops;
> + src_vq->mem_ops = &vb2_dma_contig_memops;
> + src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
> + src_vq->lock = &ctx->ipu_scaler->dev_mutex;
> +
> + 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_USERPTR | VB2_DMABUF;
> + dst_vq->drv_priv = ctx;
> + dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
> + dst_vq->ops = &ipu_scale_qops;
> + dst_vq->mem_ops = &vb2_dma_contig_memops;
> + dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
> + dst_vq->lock = &ctx->ipu_scaler->dev_mutex;
> +
> + return vb2_queue_init(dst_vq);
> +}
> +
> +/*
> + * File operations
> + */
> +static int ipu_scale_open(struct file *file) {
> + struct ipu_scale_dev *ipu_scaler = video_drvdata(file);
> + struct ipu_scale_ctx *ctx = NULL;
> + const int width = 720;
> + const int height = 576;
> + int i;
> +
> + ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
> + if (!ctx)
> + return -ENOMEM;
> +
> + INIT_WORK(&ctx->skip_run, ipu_scale_skip_run);
> + INIT_WORK(&ctx->work, ipu_scaler_work);
> + init_completion(&ctx->completion);
> + v4l2_fh_init(&ctx->fh, video_devdata(file));
> + file->private_data = &ctx->fh;
> + v4l2_fh_add(&ctx->fh);
> + ctx->ipu_scaler = ipu_scaler;
> +
> + ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(ipu_scaler->m2m_dev, ctx,
> + &queue_init);
> + if (IS_ERR(ctx->fh.m2m_ctx)) {
> + int ret = PTR_ERR(ctx->fh.m2m_ctx);
> +
> + kfree(ctx);
> + return ret;
> + }
> +
> + for (i = 0; i < 2; i++) {
> + ctx->q_data[i].cur_fmt.width = width;
> + ctx->q_data[i].cur_fmt.height = height;
> + ctx->q_data[i].cur_fmt.bytesperline = width;
> + ctx->q_data[i].cur_fmt.pixelformat = V4L2_PIX_FMT_YUV420;
> + ctx->q_data[i].cur_fmt.sizeimage = width * height * 3 / 2;
> + ctx->q_data[i].cur_fmt.colorspace = V4L2_COLORSPACE_REC709;
> + ctx->q_data[i].rect.left = 0;
> + ctx->q_data[i].rect.top = 0;
> + ctx->q_data[i].rect.width = width;
> + ctx->q_data[i].rect.height = height;
> + }
> +
> + ctx->ctrl = IPU_IMAGE_SCALE_PIXELPERFECT;
> + ctx->num_tiles = 0;
> +
> + atomic_inc(&ipu_scaler->num_inst);
> +
> + dev_dbg(ipu_scaler->dev, "Created instance %p, m2m_ctx: %p\n",
> + ctx, ctx->fh.m2m_ctx);
> +
> + return 0;
> +}
> +
> +static int ipu_scale_release(struct file *file) {
> + struct ipu_scale_dev *ipu_scaler = video_drvdata(file);
> + struct ipu_scale_ctx *ctx = fh_to_ctx(file->private_data);
> +
> + dev_dbg(ipu_scaler->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->icc);
> + kfree(ctx);
> +
> + atomic_dec(&ipu_scaler->num_inst);
> +
> + return 0;
> +}
> +
> +static const struct v4l2_file_operations ipu_scale_fops = {
> + .owner = THIS_MODULE,
> + .open = ipu_scale_open,
> + .release = ipu_scale_release,
> + .poll = v4l2_m2m_fop_poll,
> + .unlocked_ioctl = video_ioctl2,
> + .mmap = v4l2_m2m_fop_mmap,
> +};
> +
> +static struct video_device ipu_scale_videodev = {
> + .name = MEM2MEM_NAME,
> + .fops = &ipu_scale_fops,
> + .ioctl_ops = &ipu_scale_ioctl_ops,
> + .minor = -1,
> + .release = video_device_release,
> + .vfl_dir = VFL_DIR_M2M,
> +};
> +
> +static struct v4l2_m2m_ops m2m_ops = {
> + .device_run = device_run,
> + .job_ready = job_ready,
> + .job_abort = job_abort,
> +};
> +
> +static u64 vout_dmamask = ~(u32)0;
> +
> +static int ipu_scale_probe(struct platform_device *pdev) {
> + struct ipu_scale_dev *ipu_scaler;
> + struct video_device *vfd;
> + struct ipu_soc *ipu = dev_get_drvdata(pdev->dev.parent);
> + int ret;
> +
> + pdev->dev.dma_mask = &vout_dmamask;
> + pdev->dev.coherent_dma_mask = 0xffffffff;
> +
> + ipu_scaler = devm_kzalloc(&pdev->dev, sizeof(*ipu_scaler),
> GFP_KERNEL);
> + if (!ipu_scaler)
> + return -ENOMEM;
> +
> + ipu_scaler->ipu = ipu;
> + ipu_scaler->dev = &pdev->dev;
> +
> + spin_lock_init(&ipu_scaler->irqlock);
> + mutex_init(&ipu_scaler->dev_mutex);
> +
> + ret = v4l2_device_register(&pdev->dev, &ipu_scaler->v4l2_dev);
> + if (ret)
> + return ret;
> +
> + atomic_set(&ipu_scaler->num_inst, 0);
> +
> + vfd = video_device_alloc();
> + if (!vfd) {
> + dev_err(ipu_scaler->dev, "Failed to allocate video
> device\n");
> + ret = -ENOMEM;
> + goto unreg_dev;
> + }
> +
> + *vfd = ipu_scale_videodev;
> + vfd->lock = &ipu_scaler->dev_mutex;
> + vfd->v4l2_dev = &ipu_scaler->v4l2_dev;
> +
> + ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0);
> + if (ret) {
> + dev_err(ipu_scaler->dev, "Failed to register video
> device\n");
> + goto rel_vdev;
> + }
> +
> + video_set_drvdata(vfd, ipu_scaler);
> + snprintf(vfd->name, sizeof(vfd->name), "%s",
> ipu_scale_videodev.name);
> + ipu_scaler->vfd = vfd;
> + dev_dbg(ipu_scaler->dev, "Device registered as /dev/video%d\n",
> + vfd->num);
> +
> + platform_set_drvdata(pdev, ipu_scaler);
> +
> + ipu_scaler->m2m_dev = v4l2_m2m_init(&m2m_ops);
> + if (IS_ERR(ipu_scaler->m2m_dev)) {
> + dev_err(ipu_scaler->dev, "Failed to init mem2mem device\n");
> + ret = PTR_ERR(ipu_scaler->m2m_dev);
> + goto err_m2m;
> + }
> +
> + return 0;
> +
> + v4l2_m2m_release(ipu_scaler->m2m_dev);
> +err_m2m:
> + video_unregister_device(ipu_scaler->vfd);
> +rel_vdev:
> + video_device_release(vfd);
> +unreg_dev:
> + v4l2_device_unregister(&ipu_scaler->v4l2_dev);
> +
> + return ret;
> +}
> +
> +static int ipu_scale_remove(struct platform_device *pdev) {
> + struct ipu_scale_dev *ipu_scaler =
> + (struct ipu_scale_dev *)platform_get_drvdata(pdev);
> +
> + v4l2_m2m_release(ipu_scaler->m2m_dev);
> + video_unregister_device(ipu_scaler->vfd);
> + v4l2_device_unregister(&ipu_scaler->v4l2_dev);
> + kfree(ipu_scaler);
> +
> + return 0;
> +}
> +
> +static const struct platform_device_id ipu_scale_id[] = {
> + { "imx-ipuv3-scaler" },
> + {}
> +};
> +MODULE_DEVICE_TABLE(platform, ipu_scale_id);
> +
> +static struct platform_driver ipu_scale_pdrv = {
> + .probe = ipu_scale_probe,
> + .remove = ipu_scale_remove,
> + .driver = {
> + .name = "imx-ipuv3-scaler",
> + .owner = THIS_MODULE,
> + },
> +};
> +
> +static void __exit ipu_scale_exit(void) {
> + platform_driver_unregister(&ipu_scale_pdrv);
> +}
> +
> +static int __init ipu_scale_init(void)
> +{
> + return platform_driver_register(&ipu_scale_pdrv);
> +}
> +
> +module_init(ipu_scale_init);
> +module_exit(ipu_scale_exit);
> +
> +MODULE_DESCRIPTION("Virtual device for mem2mem framework testing");
> +MODULE_AUTHOR("Sascha Hauer <s.hauer at pengutronix.de>");
> +MODULE_LICENSE("GPL");
> diff --git a/drivers/media/platform/imx/imx-ipu.c
> b/drivers/media/platform/imx/imx-ipu.c
> index c1b8637..402cc8b 100644
> --- a/drivers/media/platform/imx/imx-ipu.c
> +++ b/drivers/media/platform/imx/imx-ipu.c
> @@ -102,7 +102,7 @@ struct ipu_fmt *ipu_find_fmt_rgb(unsigned int
> pixelformat) } EXPORT_SYMBOL_GPL(ipu_find_fmt_rgb);
>
> -static struct ipu_fmt *ipu_find_fmt(unsigned long pixelformat)
> +struct ipu_fmt *ipu_find_fmt(unsigned long pixelformat)
> {
> struct ipu_fmt *fmt;
>
> diff --git a/drivers/media/platform/imx/imx-ipu.h
> b/drivers/media/platform/imx/imx-ipu.h
> index 51c0982..288ee79 100644
> --- a/drivers/media/platform/imx/imx-ipu.h
> +++ b/drivers/media/platform/imx/imx-ipu.h
> @@ -16,6 +16,7 @@ int ipu_enum_fmt_yuv(struct file *file, void *fh,
> struct v4l2_fmtdesc *f);
> struct ipu_fmt *ipu_find_fmt_rgb(unsigned int pixelformat); struct
> ipu_fmt *ipu_find_fmt_yuv(unsigned int pixelformat);
> +struct ipu_fmt *ipu_find_fmt(unsigned long pixelformat);
> int ipu_try_fmt(struct file *file, void *fh,
> struct v4l2_format *f);
> int ipu_try_fmt_rgb(struct file *file, void *fh,
> --
> 2.1.4
>
> --
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