Hi Javier!
Thanks for the patch.
On Wed 11 July 2012 10:55:03 Javier Martin wrote:
> Some video decoders such as tvp5150 provide separate
> video fields (V4L2_FIELD_SEQ_TB). This driver uses
> dmaengine to convert this format to V4L2_FIELD_INTERLACED_TB
> (weaving) or V4L2_FIELD_NONE (line doubling)
Which field is used for the line doubling? Top or bottom? Or is each field
doubled, thus doubling the framerate?
I also recommend adding SEQ_BT/INTERLACED_BT support: NTSC transmits the bottom
field first, so it is useful to have support for that.
Regards,
Hans
> so that the
> image can be displayed or processed.
>
> Of course there will be combing effect in the image but this
> can be accepted for some low quality applications.
>
> Currently YUV420 and YUYV formats are supported but
> can be extended later.
> ---
> drivers/media/video/Kconfig | 8 +
> drivers/media/video/Makefile | 2 +
> drivers/media/video/m2m-deinterlace.c | 1077
> +++++++++++++++++++++++++++++++++
> 3 files changed, 1087 insertions(+)
> create mode 100644 drivers/media/video/m2m-deinterlace.c
>
> diff --git a/drivers/media/video/Kconfig b/drivers/media/video/Kconfig
> index 9cebf7b..c0b9233 100644
> --- a/drivers/media/video/Kconfig
> +++ b/drivers/media/video/Kconfig
> @@ -1188,6 +1188,14 @@ config VIDEO_CODA
> Coda is a range of video codec IPs that supports
> H.264, MPEG-4, and other video formats.
>
> +config VIDEO_MEM2MEM_DEINTERLACE
> + tristate "Deinterlace support"
> + depends on VIDEO_DEV && VIDEO_V4L2 && DMA_ENGINE
> + select VIDEOBUF2_DMA_CONTIG
> + select V4L2_MEM2MEM_DEV
> + help
> + Generic deinterlacing V4L2 driver.
> +
> config VIDEO_SAMSUNG_S5P_G2D
> tristate "Samsung S5P and EXYNOS4 G2D 2d graphics accelerator driver"
> depends on VIDEO_DEV && VIDEO_V4L2 && PLAT_S5P
> diff --git a/drivers/media/video/Makefile b/drivers/media/video/Makefile
> index a04c307..b6a01b1 100644
> --- a/drivers/media/video/Makefile
> +++ b/drivers/media/video/Makefile
> @@ -189,6 +189,8 @@ obj-$(CONFIG_VIDEO_ATMEL_ISI) += atmel-isi.o
> obj-$(CONFIG_VIDEO_MX2_EMMAPRP) += mx2_emmaprp.o
> obj-$(CONFIG_VIDEO_CODA) += coda.o
>
> +obj-$(CONFIG_VIDEO_MEM2MEM_DEINTERLACE) += m2m-deinterlace.o
> +
> obj-$(CONFIG_VIDEO_SAMSUNG_S5P_FIMC) += s5p-fimc/
> obj-$(CONFIG_VIDEO_SAMSUNG_S5P_JPEG) += s5p-jpeg/
> obj-$(CONFIG_VIDEO_SAMSUNG_S5P_MFC) += s5p-mfc/
> diff --git a/drivers/media/video/m2m-deinterlace.c
> b/drivers/media/video/m2m-deinterlace.c
> new file mode 100644
> index 0000000..9642efd
> --- /dev/null
> +++ b/drivers/media/video/m2m-deinterlace.c
> @@ -0,0 +1,1077 @@
> +/*
> + * V4L2 deinterlacing support.
> + *
> + * Copyright (c) 2012 Vista Silicon S.L.
> + * Javier Martin <[email protected]>
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License as published by the
> + * Free Software Foundation; either version 2 of the
> + * License, or (at your option) any later version
> + */
> +
> +#include <linux/module.h>
> +#include <linux/slab.h>
> +#include <linux/interrupt.h>
> +#include <linux/dmaengine.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>
> +
> +#define MEM2MEM_TEST_MODULE_NAME "mem2mem-deinterlace"
> +
> +MODULE_DESCRIPTION("mem2mem device which supports deinterlacing using
> dmaengine");
> +MODULE_AUTHOR("Javier Martin <[email protected]");
> +MODULE_LICENSE("GPL");
> +MODULE_VERSION("0.0.1");
> +
> +static bool debug = true;
> +module_param(debug, bool, 0644);
> +
> +/* Flags that indicate a format can be used for capture/output */
> +#define MEM2MEM_CAPTURE (1 << 0)
> +#define MEM2MEM_OUTPUT (1 << 1)
> +
> +#define MEM2MEM_NAME "m2m-deinterlace"
> +
> +#define dprintk(dev, fmt, arg...) \
> + v4l2_dbg(1, debug, &dev->v4l2_dev, "%s: " fmt, __func__, ## arg)
> +
> +struct deinterlace_fmt {
> + char *name;
> + u32 fourcc;
> + enum v4l2_field field;
> + /* Types the format can be used for */
> + u32 types;
> +};
> +
> +static struct deinterlace_fmt formats[] = {
> + {
> + .name = "YUV 4:2:0 Planar (weaving)",
> + .fourcc = V4L2_PIX_FMT_YUV420,
> + .field = V4L2_FIELD_INTERLACED_TB,
> + .types = MEM2MEM_CAPTURE,
> + },
> + {
> + .name = "YUV 4:2:0 Planar (line doubling)",
> + .fourcc = V4L2_PIX_FMT_YUV420,
> + /* Line doubling, top field */
> + .field = V4L2_FIELD_NONE,
> + .types = MEM2MEM_CAPTURE,
> + },
> + {
> + .name = "YUYV 4:2:2 (weaving)",
> + .fourcc = V4L2_PIX_FMT_YUYV,
> + .field = V4L2_FIELD_INTERLACED_TB,
> + .types = MEM2MEM_CAPTURE,
> + },
> + {
> + .name = "YUYV 4:2:2 (line doubling)",
> + .fourcc = V4L2_PIX_FMT_YUYV,
> + /* Line doubling, top field */
> + .field = V4L2_FIELD_NONE,
> + .types = MEM2MEM_CAPTURE,
> + },
> + {
> + .name = "YUV 4:2:0 Planar (top-bottom)",
> + .fourcc = V4L2_PIX_FMT_YUV420,
> + .field = V4L2_FIELD_SEQ_TB,
> + .types = MEM2MEM_OUTPUT,
> + },
> + {
> + .name = "YUYV 4:2:2 (top-bottom)",
> + .fourcc = V4L2_PIX_FMT_YUYV,
> + .field = V4L2_FIELD_SEQ_TB,
> + .types = MEM2MEM_OUTPUT,
> + },
> +};
> +
> +/* Per-queue, driver-specific private data */
> +struct deinterlace_q_data {
> + unsigned int width;
> + unsigned int height;
> + unsigned int sizeimage;
> + struct deinterlace_fmt *fmt;
> +};
> +
> +enum {
> + V4L2_M2M_SRC = 0,
> + V4L2_M2M_DST = 1,
> +};
> +
> +enum {
> + YUV420_DMA_Y_ODD,
> + YUV420_DMA_Y_EVEN,
> + YUV420_DMA_U_ODD,
> + YUV420_DMA_U_EVEN,
> + YUV420_DMA_V_ODD,
> + YUV420_DMA_V_EVEN,
> + YUV420_DMA_Y_ODD_DOUBLING,
> + YUV420_DMA_U_ODD_DOUBLING,
> + YUV420_DMA_V_ODD_DOUBLING,
> + YUYV_DMA_ODD,
> + YUYV_DMA_EVEN,
> + YUYV_DMA_EVEN_DOUBLING,
> +};
> +
> +/* Source and destination queue data */
> +static struct deinterlace_q_data q_data[2];
> +
> +static struct deinterlace_q_data *get_q_data(enum v4l2_buf_type type)
> +{
> + switch (type) {
> + case V4L2_BUF_TYPE_VIDEO_OUTPUT:
> + return &q_data[V4L2_M2M_SRC];
> + case V4L2_BUF_TYPE_VIDEO_CAPTURE:
> + return &q_data[V4L2_M2M_DST];
> + default:
> + BUG();
> + }
> + return NULL;
> +}
> +
> +#define NUM_FORMATS ARRAY_SIZE(formats)
> +
> +static struct deinterlace_fmt *find_format(struct v4l2_format *f)
> +{
> + struct deinterlace_fmt *fmt;
> + unsigned int k;
> +
> + for (k = 0; k < NUM_FORMATS; k++) {
> + fmt = &formats[k];
> + if ((fmt->types == f->type) &&
> + (fmt->fourcc == f->fmt.pix.pixelformat) &&
> + (fmt->field == f->fmt.pix.field))
> + break;
> + }
> +
> + if (k == NUM_FORMATS)
> + return NULL;
> +
> + return &formats[k];
> +}
> +
> +struct deinterlace_dev {
> + struct v4l2_device v4l2_dev;
> + struct video_device *vfd;
> +
> + atomic_t busy;
> + struct mutex dev_mutex;
> + spinlock_t irqlock;
> +
> + struct dma_chan *dma_chan;
> +
> + struct v4l2_m2m_dev *m2m_dev;
> + struct vb2_alloc_ctx *alloc_ctx;
> +};
> +
> +struct deinterlace_ctx {
> + struct deinterlace_dev *dev;
> +
> + /* Abort requested by m2m */
> + int aborting;
> + dma_cookie_t cookie;
> + struct v4l2_m2m_ctx *m2m_ctx;
> + struct dma_interleaved_template *xt;
> +};
> +
> +/*
> + * mem2mem callbacks
> + */
> +static int deinterlace_job_ready(void *priv)
> +{
> + struct deinterlace_ctx *ctx = priv;
> + struct deinterlace_dev *pcdev = ctx->dev;
> +
> + if ((v4l2_m2m_num_src_bufs_ready(ctx->m2m_ctx) > 0)
> + && (v4l2_m2m_num_dst_bufs_ready(ctx->m2m_ctx) > 0)
> + && (atomic_read(&ctx->dev->busy) == 0)) {
> + dprintk(pcdev, "Task ready\n");
> + return 1;
> + }
> +
> + dprintk(pcdev, "Task not ready to run\n");
> +
> + return 0;
> +}
> +
> +static void deinterlace_job_abort(void *priv)
> +{
> + struct deinterlace_ctx *ctx = priv;
> + struct deinterlace_dev *pcdev = ctx->dev;
> +
> + ctx->aborting = 1;
> +
> + dprintk(pcdev, "Aborting task\n");
> +
> + v4l2_m2m_job_finish(pcdev->m2m_dev, ctx->m2m_ctx);
> +}
> +
> +static void deinterlace_lock(void *priv)
> +{
> + struct deinterlace_ctx *ctx = priv;
> + struct deinterlace_dev *pcdev = ctx->dev;
> + mutex_lock(&pcdev->dev_mutex);
> +}
> +
> +static void deinterlace_unlock(void *priv)
> +{
> + struct deinterlace_ctx *ctx = priv;
> + struct deinterlace_dev *pcdev = ctx->dev;
> + mutex_unlock(&pcdev->dev_mutex);
> +}
> +
> +static void dma_callback(void *data)
> +{
> + struct deinterlace_ctx *curr_ctx = data;
> + struct deinterlace_dev *pcdev = curr_ctx->dev;
> + struct vb2_buffer *src_vb, *dst_vb;
> +
> + atomic_set(&pcdev->busy, 0);
> +
> + src_vb = v4l2_m2m_src_buf_remove(curr_ctx->m2m_ctx);
> + dst_vb = v4l2_m2m_dst_buf_remove(curr_ctx->m2m_ctx);
> +
> + v4l2_m2m_buf_done(src_vb, VB2_BUF_STATE_DONE);
> + v4l2_m2m_buf_done(dst_vb, VB2_BUF_STATE_DONE);
> +
> + v4l2_m2m_job_finish(pcdev->m2m_dev, curr_ctx->m2m_ctx);
> +
> + dprintk(pcdev, "dma transfers completed.\n");
> +}
> +
> +static void deinterlace_issue_dma(struct deinterlace_ctx *ctx, int op,
> + int do_callback)
> +{
> + struct deinterlace_q_data *s_q_data, *d_q_data;
> + struct vb2_buffer *src_buf, *dst_buf;
> + struct deinterlace_dev *pcdev = ctx->dev;
> + struct dma_chan *chan = pcdev->dma_chan;
> + struct dma_device *dmadev = chan->device;
> + struct dma_async_tx_descriptor *tx;
> + unsigned int s_width, s_height;
> + unsigned int d_width, d_height;
> + unsigned int d_size, s_size;
> + dma_addr_t p_in, p_out;
> + enum dma_ctrl_flags flags;
> +
> + src_buf = v4l2_m2m_next_src_buf(ctx->m2m_ctx);
> + dst_buf = v4l2_m2m_next_dst_buf(ctx->m2m_ctx);
> +
> + s_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_OUTPUT);
> + s_width = s_q_data->width;
> + s_height = s_q_data->height;
> + s_size = s_width * s_height;
> +
> + d_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_CAPTURE);
> + d_width = d_q_data->width;
> + d_height = d_q_data->height;
> + d_size = d_width * d_height;
> +
> + p_in = (dma_addr_t)vb2_dma_contig_plane_dma_addr(src_buf, 0);
> + p_out = (dma_addr_t)vb2_dma_contig_plane_dma_addr(dst_buf, 0);
> + if (!p_in || !p_out) {
> + v4l2_err(&pcdev->v4l2_dev,
> + "Acquiring kernel pointers to buffers failed\n");
> + return;
> + }
> +
> + switch (op) {
> + case YUV420_DMA_Y_ODD:
> + ctx->xt->numf = s_height / 2;
> + ctx->xt->sgl[0].size = s_width;
> + ctx->xt->sgl[0].icg = s_width;
> + ctx->xt->src_start = p_in;
> + ctx->xt->dst_start = p_out;
> + break;
> + case YUV420_DMA_Y_EVEN:
> + ctx->xt->numf = s_height / 2;
> + ctx->xt->sgl[0].size = s_width;
> + ctx->xt->sgl[0].icg = s_width;
> + ctx->xt->src_start = p_in + s_size / 2;
> + ctx->xt->dst_start = p_out + s_width;
> + break;
> + case YUV420_DMA_U_ODD:
> + ctx->xt->numf = s_height / 4;
> + ctx->xt->sgl[0].size = s_width / 2;
> + ctx->xt->sgl[0].icg = s_width / 2;
> + ctx->xt->src_start = p_in + s_size;
> + ctx->xt->dst_start = p_out + s_size;
> + break;
> + case YUV420_DMA_U_EVEN:
> + ctx->xt->numf = s_height / 4;
> + ctx->xt->sgl[0].size = s_width / 2;
> + ctx->xt->sgl[0].icg = s_width / 2;
> + ctx->xt->src_start = p_in + (9 * s_size) / 8;
> + ctx->xt->dst_start = p_out + s_size + s_width / 2;
> + break;
> + case YUV420_DMA_V_ODD:
> + ctx->xt->numf = s_height / 4;
> + ctx->xt->sgl[0].size = s_width / 2;
> + ctx->xt->sgl[0].icg = s_width / 2;
> + ctx->xt->src_start = p_in + (5 * s_size) / 4;
> + ctx->xt->dst_start = p_out + (5 * s_size) / 4;
> + break;
> + case YUV420_DMA_V_EVEN:
> + ctx->xt->numf = s_height / 4;
> + ctx->xt->sgl[0].size = s_width / 2;
> + ctx->xt->sgl[0].icg = s_width / 2;
> + ctx->xt->src_start = p_in + (11 * s_size) / 8;
> + ctx->xt->dst_start = p_out + (5 * s_size) / 4 + s_width / 2;
> + break;
> + case YUV420_DMA_Y_ODD_DOUBLING:
> + ctx->xt->numf = s_height / 2;
> + ctx->xt->sgl[0].size = s_width;
> + ctx->xt->sgl[0].icg = s_width;
> + ctx->xt->src_start = p_in;
> + ctx->xt->dst_start = p_out + s_width;
> + break;
> + case YUV420_DMA_U_ODD_DOUBLING:
> + ctx->xt->numf = s_height / 4;
> + ctx->xt->sgl[0].size = s_width / 2;
> + ctx->xt->sgl[0].icg = s_width / 2;
> + ctx->xt->src_start = p_in + s_size;
> + ctx->xt->dst_start = p_out + s_size + s_width / 2;
> + break;
> + case YUV420_DMA_V_ODD_DOUBLING:
> + ctx->xt->numf = s_height / 4;
> + ctx->xt->sgl[0].size = s_width / 2;
> + ctx->xt->sgl[0].icg = s_width / 2;
> + ctx->xt->src_start = p_in + (5 * s_size) / 4;
> + ctx->xt->dst_start = p_out + (5 * s_size) / 4 + s_width / 2;
> + break;
> + case YUYV_DMA_ODD:
> + ctx->xt->numf = s_height / 2;
> + ctx->xt->sgl[0].size = s_width * 2;
> + ctx->xt->sgl[0].icg = s_width * 2;
> + ctx->xt->src_start = p_in;
> + ctx->xt->dst_start = p_out;
> + break;
> + case YUYV_DMA_EVEN:
> + ctx->xt->numf = s_height / 2;
> + ctx->xt->sgl[0].size = s_width * 2;
> + ctx->xt->sgl[0].icg = s_width * 2;
> + ctx->xt->src_start = p_in + s_size;
> + ctx->xt->dst_start = p_out + s_width * 2;
> + break;
> + case YUYV_DMA_EVEN_DOUBLING:
> + default:
> + ctx->xt->numf = s_height / 2;
> + ctx->xt->sgl[0].size = s_width * 2;
> + ctx->xt->sgl[0].icg = s_width * 2;
> + ctx->xt->src_start = p_in;
> + ctx->xt->dst_start = p_out + s_width * 2;
> + break;
> + }
> +
> + /* Common parameters for al transfers */
> + ctx->xt->frame_size = 1;
> + ctx->xt->dir = DMA_MEM_TO_MEM;
> + ctx->xt->src_sgl = false;
> + ctx->xt->dst_sgl = true;
> + flags = DMA_CTRL_ACK | DMA_PREP_INTERRUPT |
> + DMA_COMPL_SKIP_DEST_UNMAP | DMA_COMPL_SKIP_SRC_UNMAP;
> +
> + tx = dmadev->device_prep_interleaved_dma(chan, ctx->xt, flags);
> + if (tx == NULL) {
> + v4l2_warn(&pcdev->v4l2_dev, "DMA interleaved prep error\n");
> + return;
> + }
> +
> + if (do_callback) {
> + tx->callback = dma_callback;
> + tx->callback_param = ctx;
> + }
> +
> + ctx->cookie = dmaengine_submit(tx);
> + if (dma_submit_error(ctx->cookie)) {
> + v4l2_warn(&pcdev->v4l2_dev,
> + "DMA submit error %d with src=0x%x dst=0x%x
> len=0x%x\n",
> + ctx->cookie, p_in, p_out, s_size * 3/2);
> + return;
> + }
> +
> + dma_async_issue_pending(chan);
> +}
> +
> +static void deinterlace_device_run(void *priv)
> +{
> + struct deinterlace_ctx *ctx = priv;
> + struct deinterlace_q_data *dst_q_data;
> +
> + atomic_set(&ctx->dev->busy, 1);
> +
> + dprintk(ctx->dev, "%s: DMA try issue.\n", __func__);
> +
> + dst_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_CAPTURE);
> +
> + switch (dst_q_data->fmt->fourcc) {
> + case V4L2_PIX_FMT_YUV420:
> + switch (dst_q_data->fmt->field) {
> + case V4L2_FIELD_INTERLACED_TB:
> + dprintk(ctx->dev, "%s: yuv420 interlaced tb.\n",
> + __func__);
> + deinterlace_issue_dma(ctx, YUV420_DMA_Y_ODD, 0);
> + deinterlace_issue_dma(ctx, YUV420_DMA_Y_EVEN, 0);
> + deinterlace_issue_dma(ctx, YUV420_DMA_U_ODD, 0);
> + deinterlace_issue_dma(ctx, YUV420_DMA_U_EVEN, 0);
> + deinterlace_issue_dma(ctx, YUV420_DMA_V_ODD, 0);
> + deinterlace_issue_dma(ctx, YUV420_DMA_V_EVEN, 1);
> + break;
> + case V4L2_FIELD_NONE:
> + default:
> + dprintk(ctx->dev, "%s: yuv420 interlaced line
> doubling.\n",
> + __func__);
> + deinterlace_issue_dma(ctx, YUV420_DMA_Y_ODD, 0);
> + deinterlace_issue_dma(ctx, YUV420_DMA_Y_ODD_DOUBLING,
> 0);
> + deinterlace_issue_dma(ctx, YUV420_DMA_U_ODD, 0);
> + deinterlace_issue_dma(ctx, YUV420_DMA_U_ODD_DOUBLING,
> 0);
> + deinterlace_issue_dma(ctx, YUV420_DMA_V_ODD, 0);
> + deinterlace_issue_dma(ctx, YUV420_DMA_V_ODD_DOUBLING,
> 1);
> + break;
> + }
> + break;
> + case V4L2_PIX_FMT_YUYV:
> + default:
> + switch (dst_q_data->fmt->field) {
> + case V4L2_FIELD_INTERLACED_TB:
> + dprintk(ctx->dev, "%s: yuyv interlaced_tb.\n",
> + __func__);
> + deinterlace_issue_dma(ctx, YUYV_DMA_ODD, 0);
> + deinterlace_issue_dma(ctx, YUYV_DMA_EVEN, 1);
> + break;
> + case V4L2_FIELD_NONE:
> + default:
> + dprintk(ctx->dev, "%s: yuyv interlaced line
> doubling.\n",
> + __func__);
> + deinterlace_issue_dma(ctx, YUYV_DMA_ODD, 0);
> + deinterlace_issue_dma(ctx, YUYV_DMA_EVEN_DOUBLING, 1);
> + break;
> + }
> + break;
> + }
> +
> + dprintk(ctx->dev, "%s: DMA issue done.\n", __func__);
> +}
> +
> +/*
> + * 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);
> + cap->bus_info[0] = 0;
> + cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OUTPUT
> + | V4L2_CAP_STREAMING;
> +
> + return 0;
> +}
> +
> +static int enum_fmt(struct v4l2_fmtdesc *f, u32 type)
> +{
> + int i, num;
> + struct deinterlace_fmt *fmt;
> +
> + num = 0;
> +
> + for (i = 0; i < NUM_FORMATS; ++i) {
> + if (formats[i].types & type) {
> + /* index-th format of type type found ? */
> + if (num == f->index)
> + break;
> + /* Correct type but haven't reached our index yet,
> + * just increment per-type index */
> + ++num;
> + }
> + }
> +
> + if (i < NUM_FORMATS) {
> + /* Format found */
> + fmt = &formats[i];
> + strncpy(f->description, fmt->name, sizeof(f->description) - 1);
> + f->pixelformat = fmt->fourcc;
> + return 0;
> + }
> +
> + /* Format not found */
> + return -EINVAL;
> +}
> +
> +static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
> + struct v4l2_fmtdesc *f)
> +{
> + return enum_fmt(f, MEM2MEM_CAPTURE);
> +}
> +
> +static int vidioc_enum_fmt_vid_out(struct file *file, void *priv,
> + struct v4l2_fmtdesc *f)
> +{
> + return enum_fmt(f, MEM2MEM_OUTPUT);
> +}
> +
> +static int vidioc_g_fmt(struct deinterlace_ctx *ctx, struct v4l2_format *f)
> +{
> + struct vb2_queue *vq;
> + struct deinterlace_q_data *q_data;
> +
> + vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
> + if (!vq)
> + return -EINVAL;
> +
> + q_data = get_q_data(f->type);
> +
> + f->fmt.pix.width = q_data->width;
> + f->fmt.pix.height = q_data->height;
> + f->fmt.pix.field = q_data->fmt->field;
> + f->fmt.pix.pixelformat = q_data->fmt->fourcc;
> +
> + switch (q_data->fmt->fourcc) {
> + case V4L2_PIX_FMT_YUV420:
> + f->fmt.pix.bytesperline = q_data->width * 3 / 2;
> + break;
> + case V4L2_PIX_FMT_YUYV:
> + default:
> + f->fmt.pix.bytesperline = q_data->width * 2;
> + }
> +
> + f->fmt.pix.sizeimage = q_data->sizeimage;
> +
> + return 0;
> +}
> +
> +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(struct v4l2_format *f, struct deinterlace_fmt *fmt)
> +{
> + switch (f->fmt.pix.pixelformat) {
> + case V4L2_PIX_FMT_YUV420:
> + f->fmt.pix.bytesperline = f->fmt.pix.width * 3 / 2;
> + break;
> + case V4L2_PIX_FMT_YUYV:
> + default:
> + f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
> + }
> + f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
> +
> + return 0;
> +}
> +
> +static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
> + struct v4l2_format *f)
> +{
> + struct deinterlace_fmt *fmt;
> + struct deinterlace_ctx *ctx = priv;
> +
> + fmt = find_format(f);
> + if (!fmt || !(fmt->types & MEM2MEM_CAPTURE)) {
> + v4l2_err(&ctx->dev->v4l2_dev,
> + "Fourcc format (0x%08x) invalid.\n",
> + f->fmt.pix.pixelformat);
> + return -EINVAL;
> + }
> + return vidioc_try_fmt(f, fmt);
> +}
> +
> +static int vidioc_try_fmt_vid_out(struct file *file, void *priv,
> + struct v4l2_format *f)
> +{
> + struct deinterlace_fmt *fmt;
> + struct deinterlace_ctx *ctx = priv;
> +
> + fmt = find_format(f);
> + if (!fmt || !(fmt->types & MEM2MEM_OUTPUT)) {
> + v4l2_err(&ctx->dev->v4l2_dev,
> + "Fourcc format (0x%08x) invalid.\n",
> + f->fmt.pix.pixelformat);
> + return -EINVAL;
> + }
> +
> + return vidioc_try_fmt(f, fmt);
> +}
> +
> +static int vidioc_s_fmt(struct deinterlace_ctx *ctx, struct v4l2_format *f)
> +{
> + struct deinterlace_q_data *q_data;
> + struct vb2_queue *vq;
> +
> + vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
> + if (!vq)
> + return -EINVAL;
> +
> + q_data = get_q_data(f->type);
> + if (!q_data)
> + return -EINVAL;
> +
> + if (vb2_is_busy(vq)) {
> + v4l2_err(&ctx->dev->v4l2_dev, "%s queue busy\n", __func__);
> + return -EBUSY;
> + }
> +
> + q_data->fmt = find_format(f);
> + if (!q_data->fmt) {
> + v4l2_err(&ctx->dev->v4l2_dev,
> + "Couldn't set format type %d, wxh: %dx%d. fmt: %d,
> field: %d\n",
> + f->type, f->fmt.pix.width, f->fmt.pix.height,
> + f->fmt.pix.pixelformat, f->fmt.pix.field);
> + return -EINVAL;
> + }
> +
> + q_data->width = f->fmt.pix.width;
> + q_data->height = f->fmt.pix.height;
> +
> + switch (f->fmt.pix.pixelformat) {
> + case V4L2_PIX_FMT_YUV420:
> + f->fmt.pix.bytesperline = f->fmt.pix.width * 3 / 2;
> + break;
> + case V4L2_PIX_FMT_YUYV:
> + default:
> + f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
> + }
> +
> + dprintk(ctx->dev,
> + "Setting format for type %d, wxh: %dx%d, fmt: %d, field: %d\n",
> + f->type, q_data->width, q_data->height, q_data->fmt->fourcc,
> + q_data->fmt->field);
> +
> + return 0;
> +}
> +
> +static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
> + struct v4l2_format *f)
> +{
> + int ret;
> +
> + ret = vidioc_try_fmt_vid_cap(file, priv, f);
> + if (ret)
> + return ret;
> + return vidioc_s_fmt(priv, f);
> +}
> +
> +static int vidioc_s_fmt_vid_out(struct file *file, void *priv,
> + struct v4l2_format *f)
> +{
> + int ret;
> +
> + ret = vidioc_try_fmt_vid_out(file, priv, f);
> + if (ret)
> + return ret;
> +
> + return vidioc_s_fmt(priv, f);
> +}
> +
> +static int vidioc_reqbufs(struct file *file, void *priv,
> + struct v4l2_requestbuffers *reqbufs)
> +{
> + struct deinterlace_ctx *ctx = priv;
> +
> + return v4l2_m2m_reqbufs(file, ctx->m2m_ctx, reqbufs);
> +}
> +
> +static int vidioc_querybuf(struct file *file, void *priv,
> + struct v4l2_buffer *buf)
> +{
> + struct deinterlace_ctx *ctx = priv;
> +
> + return v4l2_m2m_querybuf(file, ctx->m2m_ctx, buf);
> +}
> +
> +static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer
> *buf)
> +{
> + struct deinterlace_ctx *ctx = priv;
> +
> + return v4l2_m2m_qbuf(file, ctx->m2m_ctx, buf);
> +}
> +
> +static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer
> *buf)
> +{
> + struct deinterlace_ctx *ctx = priv;
> +
> + return v4l2_m2m_dqbuf(file, ctx->m2m_ctx, buf);
> +}
> +
> +static int vidioc_streamon(struct file *file, void *priv,
> + enum v4l2_buf_type type)
> +{
> + struct deinterlace_q_data *s_q_data, *d_q_data;
> + struct deinterlace_ctx *ctx = priv;
> +
> + /* Check that src and dst queues have the same format */
> + s_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_OUTPUT);
> + d_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_OUTPUT);
> + if (s_q_data->fmt->fourcc != d_q_data->fmt->fourcc)
> + return -EINVAL;
> +
> + return v4l2_m2m_streamon(file, ctx->m2m_ctx, type);
> +}
> +
> +static int vidioc_streamoff(struct file *file, void *priv,
> + enum v4l2_buf_type type)
> +{
> + struct deinterlace_ctx *ctx = priv;
> +
> + return v4l2_m2m_streamoff(file, ctx->m2m_ctx, type);
> +}
> +
> +static const struct v4l2_ioctl_ops deinterlace_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_vid_cap,
> +
> + .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_vid_out,
> +
> + .vidioc_reqbufs = vidioc_reqbufs,
> + .vidioc_querybuf = vidioc_querybuf,
> +
> + .vidioc_qbuf = vidioc_qbuf,
> + .vidioc_dqbuf = vidioc_dqbuf,
> +
> + .vidioc_streamon = vidioc_streamon,
> + .vidioc_streamoff = vidioc_streamoff,
> +};
> +
> +
> +/*
> + * Queue operations
> + */
> +struct vb2_dc_conf {
> + struct device *dev;
> +};
> +
> +static int deinterlace_queue_setup(struct vb2_queue *vq,
> + const struct v4l2_format *fmt,
> + unsigned int *nbuffers, unsigned int *nplanes,
> + unsigned int sizes[], void *alloc_ctxs[])
> +{
> + struct deinterlace_ctx *ctx = vb2_get_drv_priv(vq);
> + struct deinterlace_q_data *q_data;
> + unsigned int size, count = *nbuffers;
> +
> + q_data = get_q_data(vq->type);
> +
> + switch (q_data->fmt->fourcc) {
> + case V4L2_PIX_FMT_YUV420:
> + size = q_data->width * q_data->height * 3 / 2;
> + break;
> + case V4L2_PIX_FMT_YUYV:
> + default:
> + size = q_data->width * q_data->height * 2;
> + }
> +
> + *nplanes = 1;
> + *nbuffers = count;
> + sizes[0] = size;
> +
> + alloc_ctxs[0] = ctx->dev->alloc_ctx;
> +
> + dprintk(ctx->dev, "get %d buffer(s) of size %d each.\n", count, size);
> +
> + return 0;
> +}
> +
> +static int deinterlace_buf_prepare(struct vb2_buffer *vb)
> +{
> + struct deinterlace_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
> + struct deinterlace_q_data *q_data;
> +
> + dprintk(ctx->dev, "type: %d\n", vb->vb2_queue->type);
> +
> + q_data = get_q_data(vb->vb2_queue->type);
> +
> + if (vb2_plane_size(vb, 0) < q_data->sizeimage) {
> + dprintk(ctx->dev, "%s data will not fit into plane (%lu <
> %lu)\n",
> + __func__, vb2_plane_size(vb, 0),
> (long)q_data->sizeimage);
> + return -EINVAL;
> + }
> +
> + vb2_set_plane_payload(vb, 0, q_data->sizeimage);
> +
> + return 0;
> +}
> +
> +static void deinterlace_buf_queue(struct vb2_buffer *vb)
> +{
> + struct deinterlace_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
> + v4l2_m2m_buf_queue(ctx->m2m_ctx, vb);
> +}
> +
> +static struct vb2_ops deinterlace_qops = {
> + .queue_setup = deinterlace_queue_setup,
> + .buf_prepare = deinterlace_buf_prepare,
> + .buf_queue = deinterlace_buf_queue,
> +};
> +
> +static int queue_init(void *priv, struct vb2_queue *src_vq,
> + struct vb2_queue *dst_vq)
> +{
> + struct deinterlace_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;
> + src_vq->drv_priv = ctx;
> + src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
> + src_vq->ops = &deinterlace_qops;
> + src_vq->mem_ops = &vb2_dma_contig_memops;
> +
> + 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;
> + dst_vq->drv_priv = ctx;
> + dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
> + dst_vq->ops = &deinterlace_qops;
> + dst_vq->mem_ops = &vb2_dma_contig_memops;
> +
> + return vb2_queue_init(dst_vq);
> +}
> +
> +/*
> + * File operations
> + */
> +static int deinterlace_open(struct file *file)
> +{
> + struct deinterlace_dev *pcdev = video_drvdata(file);
> + struct deinterlace_ctx *ctx = NULL;
> +
> + ctx = kzalloc(sizeof *ctx, GFP_KERNEL);
> + if (!ctx)
> + return -ENOMEM;
> +
> + file->private_data = ctx;
> + ctx->dev = pcdev;
> +
> + ctx->m2m_ctx = v4l2_m2m_ctx_init(pcdev->m2m_dev, ctx, &queue_init);
> + if (IS_ERR(ctx->m2m_ctx)) {
> + int ret = PTR_ERR(ctx->m2m_ctx);
> +
> + kfree(ctx);
> + return ret;
> + }
> +
> + ctx->xt = kzalloc(sizeof(struct dma_async_tx_descriptor) +
> + sizeof(struct data_chunk), GFP_KERNEL);
> + if (!ctx->xt) {
> + int ret = PTR_ERR(ctx->xt);
> +
> + kfree(ctx);
> + return ret;
> + }
> +
> + dprintk(pcdev, "Created instance %p, m2m_ctx: %p\n", ctx, ctx->m2m_ctx);
> +
> + return 0;
> +}
> +
> +static int deinterlace_release(struct file *file)
> +{
> + struct deinterlace_dev *pcdev = video_drvdata(file);
> + struct deinterlace_ctx *ctx = file->private_data;
> +
> + dprintk(pcdev, "Releasing instance %p\n", ctx);
> +
> + v4l2_m2m_ctx_release(ctx->m2m_ctx);
> + kfree(ctx->xt);
> + kfree(ctx);
> +
> + return 0;
> +}
> +
> +static unsigned int deinterlace_poll(struct file *file,
> + struct poll_table_struct *wait)
> +{
> + struct deinterlace_ctx *ctx = file->private_data;
> + int ret;
> +
> + deinterlace_lock(ctx);
> + ret = v4l2_m2m_poll(file, ctx->m2m_ctx, wait);
> + deinterlace_unlock(ctx);
> +
> + return ret;
> +}
> +
> +static int deinterlace_mmap(struct file *file, struct vm_area_struct *vma)
> +{
> + struct deinterlace_ctx *ctx = file->private_data;
> +
> + return v4l2_m2m_mmap(file, ctx->m2m_ctx, vma);
> +}
> +
> +static const struct v4l2_file_operations deinterlace_fops = {
> + .owner = THIS_MODULE,
> + .open = deinterlace_open,
> + .release = deinterlace_release,
> + .poll = deinterlace_poll,
> + .unlocked_ioctl = video_ioctl2,
> + .mmap = deinterlace_mmap,
> +};
> +
> +static struct video_device deinterlace_videodev = {
> + .name = MEM2MEM_NAME,
> + .fops = &deinterlace_fops,
> + .ioctl_ops = &deinterlace_ioctl_ops,
> + .minor = -1,
> + .release = video_device_release,
> +};
> +
> +static struct v4l2_m2m_ops m2m_ops = {
> + .device_run = deinterlace_device_run,
> + .job_ready = deinterlace_job_ready,
> + .job_abort = deinterlace_job_abort,
> + .lock = deinterlace_lock,
> + .unlock = deinterlace_unlock,
> +};
> +
> +static int deinterlace_probe(struct platform_device *pdev)
> +{
> + struct deinterlace_dev *pcdev;
> + struct video_device *vfd;
> + dma_cap_mask_t mask;
> + int ret = 0;
> +
> + pcdev = kzalloc(sizeof *pcdev, GFP_KERNEL);
> + if (!pcdev)
> + return -ENOMEM;
> +
> + spin_lock_init(&pcdev->irqlock);
> +
> + dma_cap_zero(mask);
> + dma_cap_set(DMA_INTERLEAVE, mask);
> + pcdev->dma_chan = dma_request_channel(mask, NULL, pcdev);
> + if (!pcdev->dma_chan)
> + goto free_dev;
> +
> + if (!dma_has_cap(DMA_INTERLEAVE, pcdev->dma_chan->device->cap_mask)) {
> + v4l2_err(&pcdev->v4l2_dev, "DMA does not support INTERLEAVE\n");
> + goto rel_dma;
> + }
> +
> + ret = v4l2_device_register(&pdev->dev, &pcdev->v4l2_dev);
> + if (ret)
> + goto rel_dma;
> +
> + atomic_set(&pcdev->busy, 0);
> + mutex_init(&pcdev->dev_mutex);
> +
> + vfd = video_device_alloc();
> + if (!vfd) {
> + v4l2_err(&pcdev->v4l2_dev, "Failed to allocate video device\n");
> + ret = -ENOMEM;
> + goto unreg_dev;
> + }
> +
> + *vfd = deinterlace_videodev;
> + vfd->lock = &pcdev->dev_mutex;
> +
> + ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0);
> + if (ret) {
> + v4l2_err(&pcdev->v4l2_dev, "Failed to register video device\n");
> + goto rel_vdev;
> + }
> +
> + video_set_drvdata(vfd, pcdev);
> + snprintf(vfd->name, sizeof(vfd->name), "%s", deinterlace_videodev.name);
> + pcdev->vfd = vfd;
> + v4l2_info(&pcdev->v4l2_dev, MEM2MEM_TEST_MODULE_NAME
> + " Device registered as /dev/video%d\n", vfd->num);
> +
> + platform_set_drvdata(pdev, pcdev);
> +
> + pcdev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
> + if (IS_ERR(pcdev->alloc_ctx)) {
> + v4l2_err(&pcdev->v4l2_dev, "Failed to alloc vb2 context\n");
> + ret = PTR_ERR(pcdev->alloc_ctx);
> + goto err_ctx;
> + }
> +
> + pcdev->m2m_dev = v4l2_m2m_init(&m2m_ops);
> + if (IS_ERR(pcdev->m2m_dev)) {
> + v4l2_err(&pcdev->v4l2_dev, "Failed to init mem2mem device\n");
> + ret = PTR_ERR(pcdev->m2m_dev);
> + goto err_m2m;
> + }
> +
> + q_data[V4L2_M2M_SRC].fmt = &formats[1];
> + q_data[V4L2_M2M_DST].fmt = &formats[0];
> +
> + return 0;
> +
> + v4l2_m2m_release(pcdev->m2m_dev);
> +err_m2m:
> + video_unregister_device(pcdev->vfd);
> +err_ctx:
> + vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
> +rel_vdev:
> + video_device_release(vfd);
> +unreg_dev:
> + v4l2_device_unregister(&pcdev->v4l2_dev);
> +rel_dma:
> + dma_release_channel(pcdev->dma_chan);
> +free_dev:
> + kfree(pcdev);
> +
> + return ret;
> +}
> +
> +static int deinterlace_remove(struct platform_device *pdev)
> +{
> + struct deinterlace_dev *pcdev =
> + (struct deinterlace_dev *)platform_get_drvdata(pdev);
> +
> + v4l2_info(&pcdev->v4l2_dev, "Removing " MEM2MEM_TEST_MODULE_NAME);
> + v4l2_m2m_release(pcdev->m2m_dev);
> + video_unregister_device(pcdev->vfd);
> + v4l2_device_unregister(&pcdev->v4l2_dev);
> + vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
> + dma_release_channel(pcdev->dma_chan);
> + kfree(pcdev);
> +
> + return 0;
> +}
> +
> +static struct platform_driver deinterlace_pdrv = {
> + .probe = deinterlace_probe,
> + .remove = deinterlace_remove,
> + .driver = {
> + .name = MEM2MEM_NAME,
> + .owner = THIS_MODULE,
> + },
> +};
> +
> +static void __exit deinterlace_exit(void)
> +{
> + platform_driver_unregister(&deinterlace_pdrv);
> +}
> +
> +static int __init deinterlace_init(void)
> +{
> + return platform_driver_register(&deinterlace_pdrv);
> +}
> +
> +module_init(deinterlace_init);
> +module_exit(deinterlace_exit);
> +
>
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