--- /dev/null
+/*
+ * 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, 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);
+
+ /*
+ * 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));
+ cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OUTPUT
+ | 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;
+
+ 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;
+ 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;
+
+ 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;
+ 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,
+};
+
+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);
+
projects / users / willy / pagecache.git / commitdiff