diff options
Diffstat (limited to 'drivers/media/platform/m2m-deinterlace.c')
| -rw-r--r-- | drivers/media/platform/m2m-deinterlace.c | 1124 |
1 files changed, 1124 insertions, 0 deletions
diff --git a/drivers/media/platform/m2m-deinterlace.c b/drivers/media/platform/m2m-deinterlace.c new file mode 100644 index 00000000000..45164c4f845 --- /dev/null +++ b/drivers/media/platform/m2m-deinterlace.c @@ -0,0 +1,1124 @@ +/* + * V4L2 deinterlacing support. + * + * Copyright (c) 2012 Vista Silicon S.L. + * Javier Martin <javier.martin@vista-silicon.com> + * + * 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 <javier.martin@vista-silicon.com"); +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; + /* Types the format can be used for */ + u32 types; +}; + +static struct deinterlace_fmt formats[] = { + { + .name = "YUV 4:2:0 Planar", + .fourcc = V4L2_PIX_FMT_YUV420, + .types = MEM2MEM_CAPTURE | MEM2MEM_OUTPUT, + }, + { + .name = "YUYV 4:2:2", + .fourcc = V4L2_PIX_FMT_YUYV, + .types = MEM2MEM_CAPTURE | MEM2MEM_OUTPUT, + }, +}; + +#define NUM_FORMATS ARRAY_SIZE(formats) + +/* 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_field field; +}; + +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; +} + +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)) + 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; + enum v4l2_colorspace colorspace; + 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, (unsigned)p_in, (unsigned)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); + + /* + * 4 possible field conversions are possible at the moment: + * V4L2_FIELD_SEQ_TB --> V4L2_FIELD_INTERLACED_TB: + * two separate fields in the same input buffer are interlaced + * in the output buffer using weaving. Top field comes first. + * V4L2_FIELD_SEQ_TB --> V4L2_FIELD_NONE: + * top field from the input buffer is copied to the output buffer + * using line doubling. Bottom field from the input buffer is discarded. + * V4L2_FIELD_SEQ_BT --> V4L2_FIELD_INTERLACED_BT: + * two separate fields in the same input buffer are interlaced + * in the output buffer using weaving. Bottom field comes first. + * V4L2_FIELD_SEQ_BT --> V4L2_FIELD_NONE: + * bottom field from the input buffer is copied to the output buffer + * using line doubling. Top field from the input buffer is discarded. + */ + switch (dst_q_data->fmt->fourcc) { + case V4L2_PIX_FMT_YUV420: + switch (dst_q_data->field) { + case V4L2_FIELD_INTERLACED_TB: + case V4L2_FIELD_INTERLACED_BT: + 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->field) { + case V4L2_FIELD_INTERLACED_TB: + case V4L2_FIELD_INTERLACED_BT: + 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) +{ + strlcpy(cap->driver, MEM2MEM_NAME, sizeof(cap->driver)); + strlcpy(cap->card, MEM2MEM_NAME, sizeof(cap->card)); + strlcpy(cap->bus_info, MEM2MEM_NAME, sizeof(cap->card)); + /* + * This is only a mem-to-mem video device. The capture and output + * device capability flags are left only for backward compatibility + * and are scheduled for removal. + */ + cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OUTPUT | + V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING; + cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS; + + 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]; + strlcpy(f->description, fmt->name, sizeof(f->description)); + 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->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; + f->fmt.pix.colorspace = ctx->colorspace; + + 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)) + f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUV420; + + f->fmt.pix.colorspace = ctx->colorspace; + + if (f->fmt.pix.field != V4L2_FIELD_INTERLACED_TB && + f->fmt.pix.field != V4L2_FIELD_INTERLACED_BT && + f->fmt.pix.field != V4L2_FIELD_NONE) + f->fmt.pix.field = V4L2_FIELD_INTERLACED_TB; + + 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; + + fmt = find_format(f); + if (!fmt || !(fmt->types & MEM2MEM_OUTPUT)) + f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUV420; + + if (!f->fmt.pix.colorspace) + f->fmt.pix.colorspace = V4L2_COLORSPACE_REC709; + + if (f->fmt.pix.field != V4L2_FIELD_SEQ_TB && + f->fmt.pix.field != V4L2_FIELD_SEQ_BT) + f->fmt.pix.field = V4L2_FIELD_SEQ_TB; + + 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; + q_data->field = f->fmt.pix.field; + + switch (f->fmt.pix.pixelformat) { + case V4L2_PIX_FMT_YUV420: + f->fmt.pix.bytesperline = f->fmt.pix.width * 3 / 2; + q_data->sizeimage = (q_data->width * q_data->height * 3) / 2; + break; + case V4L2_PIX_FMT_YUYV: + default: + f->fmt.pix.bytesperline = f->fmt.pix.width * 2; + q_data->sizeimage = q_data->width * q_data->height * 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->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) +{ + struct deinterlace_ctx *ctx = priv; + int ret; + + ret = vidioc_try_fmt_vid_out(file, priv, f); + if (ret) + return ret; + + ret = vidioc_s_fmt(priv, f); + if (!ret) + ctx->colorspace = f->fmt.pix.colorspace; + + return ret; +} + +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; + + s_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_OUTPUT); + d_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_CAPTURE); + + /* Check that src and dst queues have the same pix format */ + if (s_q_data->fmt->fourcc != d_q_data->fmt->fourcc) { + v4l2_err(&ctx->dev->v4l2_dev, + "src and dst formats don't match.\n"); + return -EINVAL; + } + + /* Check that input and output deinterlacing types are compatible */ + switch (s_q_data->field) { + case V4L2_FIELD_SEQ_BT: + if (d_q_data->field != V4L2_FIELD_NONE && + d_q_data->field != V4L2_FIELD_INTERLACED_BT) { + v4l2_err(&ctx->dev->v4l2_dev, + "src and dst field conversion [(%d)->(%d)] not supported.\n", + s_q_data->field, d_q_data->field); + return -EINVAL; + } + break; + case V4L2_FIELD_SEQ_TB: + if (d_q_data->field != V4L2_FIELD_NONE && + d_q_data->field != V4L2_FIELD_INTERLACED_TB) { + v4l2_err(&ctx->dev->v4l2_dev, + "src and dst field conversion [(%d)->(%d)] not supported.\n", + s_q_data->field, d_q_data->field); + return -EINVAL; + } + break; + default: + 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; + + 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; + q_data[V4L2_M2M_SRC].fmt = &formats[0]; + q_data[V4L2_M2M_SRC].width = 640; + q_data[V4L2_M2M_SRC].height = 480; + q_data[V4L2_M2M_SRC].sizeimage = (640 * 480 * 3) / 2; + q_data[V4L2_M2M_SRC].field = V4L2_FIELD_SEQ_TB; + + ret = vb2_queue_init(src_vq); + if (ret) + return ret; + + 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; + q_data[V4L2_M2M_DST].fmt = &formats[0]; + q_data[V4L2_M2M_DST].width = 640; + q_data[V4L2_M2M_DST].height = 480; + q_data[V4L2_M2M_DST].sizeimage = (640 * 480 * 3) / 2; + q_data[V4L2_M2M_SRC].field = V4L2_FIELD_INTERLACED_TB; + + 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; + } + + ctx->colorspace = V4L2_COLORSPACE_REC709; + + 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, + .vfl_dir = VFL_DIR_M2M, +}; + +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; + } + + 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); + |