| /* |
| * A virtual v4l2-mem2mem example device. |
| * |
| * This is a virtual device driver for testing mem-to-mem videobuf framework. |
| * It simulates a device that uses memory buffers for both source and |
| * destination, processes the data and issues an "irq" (simulated by a timer). |
| * The device is capable of multi-instance, multi-buffer-per-transaction |
| * operation (via the mem2mem framework). |
| * |
| * Copyright (c) 2009-2010 Samsung Electronics Co., Ltd. |
| * Pawel Osciak, <pawel@osciak.com> |
| * Marek Szyprowski, <m.szyprowski@samsung.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/delay.h> |
| #include <linux/fs.h> |
| #include <linux/timer.h> |
| #include <linux/sched.h> |
| #include <linux/slab.h> |
| |
| #include <linux/platform_device.h> |
| #include <media/v4l2-mem2mem.h> |
| #include <media/v4l2-device.h> |
| #include <media/v4l2-ioctl.h> |
| #include <media/v4l2-ctrls.h> |
| #include <media/v4l2-event.h> |
| #include <media/videobuf2-vmalloc.h> |
| |
| #define MEM2MEM_TEST_MODULE_NAME "mem2mem-testdev" |
| |
| MODULE_DESCRIPTION("Virtual device for mem2mem framework testing"); |
| MODULE_AUTHOR("Pawel Osciak, <pawel@osciak.com>"); |
| MODULE_LICENSE("GPL"); |
| MODULE_VERSION("0.1.1"); |
| |
| #define MIN_W 32 |
| #define MIN_H 32 |
| #define MAX_W 640 |
| #define MAX_H 480 |
| #define DIM_ALIGN_MASK 7 /* 8-byte alignment for line length */ |
| |
| /* 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-testdev" |
| |
| /* Per queue */ |
| #define MEM2MEM_DEF_NUM_BUFS VIDEO_MAX_FRAME |
| /* In bytes, per queue */ |
| #define MEM2MEM_VID_MEM_LIMIT (16 * 1024 * 1024) |
| |
| /* Default transaction time in msec */ |
| #define MEM2MEM_DEF_TRANSTIME 1000 |
| /* Default number of buffers per transaction */ |
| #define MEM2MEM_DEF_TRANSLEN 1 |
| #define MEM2MEM_COLOR_STEP (0xff >> 4) |
| #define MEM2MEM_NUM_TILES 8 |
| |
| /* Flags that indicate processing mode */ |
| #define MEM2MEM_HFLIP (1 << 0) |
| #define MEM2MEM_VFLIP (1 << 1) |
| |
| #define dprintk(dev, fmt, arg...) \ |
| v4l2_dbg(1, 1, &dev->v4l2_dev, "%s: " fmt, __func__, ## arg) |
| |
| |
| void m2mtest_dev_release(struct device *dev) |
| {} |
| |
| static struct platform_device m2mtest_pdev = { |
| .name = MEM2MEM_NAME, |
| .dev.release = m2mtest_dev_release, |
| }; |
| |
| struct m2mtest_fmt { |
| char *name; |
| u32 fourcc; |
| int depth; |
| /* Types the format can be used for */ |
| u32 types; |
| }; |
| |
| static struct m2mtest_fmt formats[] = { |
| { |
| .name = "RGB565 (BE)", |
| .fourcc = V4L2_PIX_FMT_RGB565X, /* rrrrrggg gggbbbbb */ |
| .depth = 16, |
| /* Both capture and output format */ |
| .types = MEM2MEM_CAPTURE | MEM2MEM_OUTPUT, |
| }, |
| { |
| .name = "4:2:2, packed, YUYV", |
| .fourcc = V4L2_PIX_FMT_YUYV, |
| .depth = 16, |
| /* Output-only format */ |
| .types = MEM2MEM_OUTPUT, |
| }, |
| }; |
| |
| #define NUM_FORMATS ARRAY_SIZE(formats) |
| |
| /* Per-queue, driver-specific private data */ |
| struct m2mtest_q_data { |
| unsigned int width; |
| unsigned int height; |
| unsigned int sizeimage; |
| struct m2mtest_fmt *fmt; |
| }; |
| |
| enum { |
| V4L2_M2M_SRC = 0, |
| V4L2_M2M_DST = 1, |
| }; |
| |
| #define V4L2_CID_TRANS_TIME_MSEC (V4L2_CID_USER_BASE + 0x1000) |
| #define V4L2_CID_TRANS_NUM_BUFS (V4L2_CID_USER_BASE + 0x1001) |
| |
| static struct m2mtest_fmt *find_format(struct v4l2_format *f) |
| { |
| struct m2mtest_fmt *fmt; |
| unsigned int k; |
| |
| for (k = 0; k < NUM_FORMATS; k++) { |
| fmt = &formats[k]; |
| if (fmt->fourcc == f->fmt.pix.pixelformat) |
| break; |
| } |
| |
| if (k == NUM_FORMATS) |
| return NULL; |
| |
| return &formats[k]; |
| } |
| |
| struct m2mtest_dev { |
| struct v4l2_device v4l2_dev; |
| struct video_device *vfd; |
| |
| atomic_t num_inst; |
| struct mutex dev_mutex; |
| spinlock_t irqlock; |
| |
| struct timer_list timer; |
| |
| struct v4l2_m2m_dev *m2m_dev; |
| }; |
| |
| struct m2mtest_ctx { |
| struct v4l2_fh fh; |
| struct m2mtest_dev *dev; |
| |
| struct v4l2_ctrl_handler hdl; |
| |
| /* Processed buffers in this transaction */ |
| u8 num_processed; |
| |
| /* Transaction length (i.e. how many buffers per transaction) */ |
| u32 translen; |
| /* Transaction time (i.e. simulated processing time) in milliseconds */ |
| u32 transtime; |
| |
| /* Abort requested by m2m */ |
| int aborting; |
| |
| /* Processing mode */ |
| int mode; |
| |
| enum v4l2_colorspace colorspace; |
| |
| struct v4l2_m2m_ctx *m2m_ctx; |
| |
| /* Source and destination queue data */ |
| struct m2mtest_q_data q_data[2]; |
| }; |
| |
| static inline struct m2mtest_ctx *file2ctx(struct file *file) |
| { |
| return container_of(file->private_data, struct m2mtest_ctx, fh); |
| } |
| |
| static struct m2mtest_q_data *get_q_data(struct m2mtest_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; |
| } |
| |
| |
| static int device_process(struct m2mtest_ctx *ctx, |
| struct vb2_buffer *in_vb, |
| struct vb2_buffer *out_vb) |
| { |
| struct m2mtest_dev *dev = ctx->dev; |
| struct m2mtest_q_data *q_data; |
| u8 *p_in, *p_out; |
| int x, y, t, w; |
| int tile_w, bytes_left; |
| int width, height, bytesperline; |
| |
| q_data = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT); |
| |
| width = q_data->width; |
| height = q_data->height; |
| bytesperline = (q_data->width * q_data->fmt->depth) >> 3; |
| |
| p_in = vb2_plane_vaddr(in_vb, 0); |
| p_out = vb2_plane_vaddr(out_vb, 0); |
| if (!p_in || !p_out) { |
| v4l2_err(&dev->v4l2_dev, |
| "Acquiring kernel pointers to buffers failed\n"); |
| return -EFAULT; |
| } |
| |
| if (vb2_plane_size(in_vb, 0) > vb2_plane_size(out_vb, 0)) { |
| v4l2_err(&dev->v4l2_dev, "Output buffer is too small\n"); |
| return -EINVAL; |
| } |
| |
| tile_w = (width * (q_data[V4L2_M2M_DST].fmt->depth >> 3)) |
| / MEM2MEM_NUM_TILES; |
| bytes_left = bytesperline - tile_w * MEM2MEM_NUM_TILES; |
| w = 0; |
| |
| switch (ctx->mode) { |
| case MEM2MEM_HFLIP | MEM2MEM_VFLIP: |
| p_out += bytesperline * height - bytes_left; |
| for (y = 0; y < height; ++y) { |
| for (t = 0; t < MEM2MEM_NUM_TILES; ++t) { |
| if (w & 0x1) { |
| for (x = 0; x < tile_w; ++x) |
| *--p_out = *p_in++ + |
| MEM2MEM_COLOR_STEP; |
| } else { |
| for (x = 0; x < tile_w; ++x) |
| *--p_out = *p_in++ - |
| MEM2MEM_COLOR_STEP; |
| } |
| ++w; |
| } |
| p_in += bytes_left; |
| p_out -= bytes_left; |
| } |
| break; |
| |
| case MEM2MEM_HFLIP: |
| for (y = 0; y < height; ++y) { |
| p_out += MEM2MEM_NUM_TILES * tile_w; |
| for (t = 0; t < MEM2MEM_NUM_TILES; ++t) { |
| if (w & 0x01) { |
| for (x = 0; x < tile_w; ++x) |
| *--p_out = *p_in++ + |
| MEM2MEM_COLOR_STEP; |
| } else { |
| for (x = 0; x < tile_w; ++x) |
| *--p_out = *p_in++ - |
| MEM2MEM_COLOR_STEP; |
| } |
| ++w; |
| } |
| p_in += bytes_left; |
| p_out += bytesperline; |
| } |
| break; |
| |
| case MEM2MEM_VFLIP: |
| p_out += bytesperline * (height - 1); |
| for (y = 0; y < height; ++y) { |
| for (t = 0; t < MEM2MEM_NUM_TILES; ++t) { |
| if (w & 0x1) { |
| for (x = 0; x < tile_w; ++x) |
| *p_out++ = *p_in++ + |
| MEM2MEM_COLOR_STEP; |
| } else { |
| for (x = 0; x < tile_w; ++x) |
| *p_out++ = *p_in++ - |
| MEM2MEM_COLOR_STEP; |
| } |
| ++w; |
| } |
| p_in += bytes_left; |
| p_out += bytes_left - 2 * bytesperline; |
| } |
| break; |
| |
| default: |
| for (y = 0; y < height; ++y) { |
| for (t = 0; t < MEM2MEM_NUM_TILES; ++t) { |
| if (w & 0x1) { |
| for (x = 0; x < tile_w; ++x) |
| *p_out++ = *p_in++ + |
| MEM2MEM_COLOR_STEP; |
| } else { |
| for (x = 0; x < tile_w; ++x) |
| *p_out++ = *p_in++ - |
| MEM2MEM_COLOR_STEP; |
| } |
| ++w; |
| } |
| p_in += bytes_left; |
| p_out += bytes_left; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static void schedule_irq(struct m2mtest_dev *dev, int msec_timeout) |
| { |
| dprintk(dev, "Scheduling a simulated irq\n"); |
| mod_timer(&dev->timer, jiffies + msecs_to_jiffies(msec_timeout)); |
| } |
| |
| /* |
| * mem2mem callbacks |
| */ |
| |
| /** |
| * job_ready() - check whether an instance is ready to be scheduled to run |
| */ |
| static int job_ready(void *priv) |
| { |
| struct m2mtest_ctx *ctx = priv; |
| |
| if (v4l2_m2m_num_src_bufs_ready(ctx->m2m_ctx) < ctx->translen |
| || v4l2_m2m_num_dst_bufs_ready(ctx->m2m_ctx) < ctx->translen) { |
| dprintk(ctx->dev, "Not enough buffers available\n"); |
| return 0; |
| } |
| |
| return 1; |
| } |
| |
| static void job_abort(void *priv) |
| { |
| struct m2mtest_ctx *ctx = priv; |
| |
| /* Will cancel the transaction in the next interrupt handler */ |
| ctx->aborting = 1; |
| } |
| |
| static void m2mtest_lock(void *priv) |
| { |
| struct m2mtest_ctx *ctx = priv; |
| struct m2mtest_dev *dev = ctx->dev; |
| mutex_lock(&dev->dev_mutex); |
| } |
| |
| static void m2mtest_unlock(void *priv) |
| { |
| struct m2mtest_ctx *ctx = priv; |
| struct m2mtest_dev *dev = ctx->dev; |
| mutex_unlock(&dev->dev_mutex); |
| } |
| |
| |
| /* device_run() - prepares and starts the device |
| * |
| * This simulates all the immediate preparations required before starting |
| * a device. This will be called by the framework when it decides to schedule |
| * a particular instance. |
| */ |
| static void device_run(void *priv) |
| { |
| struct m2mtest_ctx *ctx = priv; |
| struct m2mtest_dev *dev = ctx->dev; |
| struct vb2_buffer *src_buf, *dst_buf; |
| |
| src_buf = v4l2_m2m_next_src_buf(ctx->m2m_ctx); |
| dst_buf = v4l2_m2m_next_dst_buf(ctx->m2m_ctx); |
| |
| device_process(ctx, src_buf, dst_buf); |
| |
| /* Run a timer, which simulates a hardware irq */ |
| schedule_irq(dev, ctx->transtime); |
| } |
| |
| static void device_isr(unsigned long priv) |
| { |
| struct m2mtest_dev *m2mtest_dev = (struct m2mtest_dev *)priv; |
| struct m2mtest_ctx *curr_ctx; |
| struct vb2_buffer *src_vb, *dst_vb; |
| unsigned long flags; |
| |
| curr_ctx = v4l2_m2m_get_curr_priv(m2mtest_dev->m2m_dev); |
| |
| if (NULL == curr_ctx) { |
| printk(KERN_ERR |
| "Instance released before the end of transaction\n"); |
| return; |
| } |
| |
| src_vb = v4l2_m2m_src_buf_remove(curr_ctx->m2m_ctx); |
| dst_vb = v4l2_m2m_dst_buf_remove(curr_ctx->m2m_ctx); |
| |
| curr_ctx->num_processed++; |
| |
| spin_lock_irqsave(&m2mtest_dev->irqlock, flags); |
| v4l2_m2m_buf_done(src_vb, VB2_BUF_STATE_DONE); |
| v4l2_m2m_buf_done(dst_vb, VB2_BUF_STATE_DONE); |
| spin_unlock_irqrestore(&m2mtest_dev->irqlock, flags); |
| |
| if (curr_ctx->num_processed == curr_ctx->translen |
| || curr_ctx->aborting) { |
| dprintk(curr_ctx->dev, "Finishing transaction\n"); |
| curr_ctx->num_processed = 0; |
| v4l2_m2m_job_finish(m2mtest_dev->m2m_dev, curr_ctx->m2m_ctx); |
| } else { |
| device_run(curr_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); |
| strlcpy(cap->bus_info, MEM2MEM_NAME, sizeof(cap->bus_info)); |
| 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 m2mtest_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 m2mtest_ctx *ctx, struct v4l2_format *f) |
| { |
| struct vb2_queue *vq; |
| struct m2mtest_q_data *q_data; |
| |
| vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type); |
| if (!vq) |
| return -EINVAL; |
| |
| q_data = get_q_data(ctx, f->type); |
| |
| f->fmt.pix.width = q_data->width; |
| f->fmt.pix.height = q_data->height; |
| f->fmt.pix.field = V4L2_FIELD_NONE; |
| f->fmt.pix.pixelformat = q_data->fmt->fourcc; |
| f->fmt.pix.bytesperline = (q_data->width * q_data->fmt->depth) >> 3; |
| 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(file2ctx(file), f); |
| } |
| |
| static int vidioc_g_fmt_vid_cap(struct file *file, void *priv, |
| struct v4l2_format *f) |
| { |
| return vidioc_g_fmt(file2ctx(file), f); |
| } |
| |
| static int vidioc_try_fmt(struct v4l2_format *f, struct m2mtest_fmt *fmt) |
| { |
| enum v4l2_field field; |
| |
| field = f->fmt.pix.field; |
| |
| if (field == V4L2_FIELD_ANY) |
| field = V4L2_FIELD_NONE; |
| else if (V4L2_FIELD_NONE != field) |
| return -EINVAL; |
| |
| /* V4L2 specification suggests the driver corrects the format struct |
| * if any of the dimensions is unsupported */ |
| f->fmt.pix.field = field; |
| |
| if (f->fmt.pix.height < MIN_H) |
| f->fmt.pix.height = MIN_H; |
| else if (f->fmt.pix.height > MAX_H) |
| f->fmt.pix.height = MAX_H; |
| |
| if (f->fmt.pix.width < MIN_W) |
| f->fmt.pix.width = MIN_W; |
| else if (f->fmt.pix.width > MAX_W) |
| f->fmt.pix.width = MAX_W; |
| |
| f->fmt.pix.width &= ~DIM_ALIGN_MASK; |
| f->fmt.pix.bytesperline = (f->fmt.pix.width * fmt->depth) >> 3; |
| 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 m2mtest_fmt *fmt; |
| struct m2mtest_ctx *ctx = file2ctx(file); |
| |
| 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; |
| } |
| f->fmt.pix.colorspace = ctx->colorspace; |
| |
| return vidioc_try_fmt(f, fmt); |
| } |
| |
| static int vidioc_try_fmt_vid_out(struct file *file, void *priv, |
| struct v4l2_format *f) |
| { |
| struct m2mtest_fmt *fmt; |
| struct m2mtest_ctx *ctx = file2ctx(file); |
| |
| 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; |
| } |
| if (!f->fmt.pix.colorspace) |
| f->fmt.pix.colorspace = V4L2_COLORSPACE_REC709; |
| |
| return vidioc_try_fmt(f, fmt); |
| } |
| |
| static int vidioc_s_fmt(struct m2mtest_ctx *ctx, struct v4l2_format *f) |
| { |
| struct m2mtest_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(ctx, 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); |
| q_data->width = f->fmt.pix.width; |
| q_data->height = f->fmt.pix.height; |
| q_data->sizeimage = q_data->width * q_data->height |
| * q_data->fmt->depth >> 3; |
| |
| dprintk(ctx->dev, |
| "Setting format for type %d, wxh: %dx%d, fmt: %d\n", |
| f->type, q_data->width, q_data->height, q_data->fmt->fourcc); |
| |
| 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(file2ctx(file), f); |
| } |
| |
| static int vidioc_s_fmt_vid_out(struct file *file, void *priv, |
| struct v4l2_format *f) |
| { |
| struct m2mtest_ctx *ctx = file2ctx(file); |
| int ret; |
| |
| ret = vidioc_try_fmt_vid_out(file, priv, f); |
| if (ret) |
| return ret; |
| |
| ret = vidioc_s_fmt(file2ctx(file), 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 m2mtest_ctx *ctx = file2ctx(file); |
| |
| return v4l2_m2m_reqbufs(file, ctx->m2m_ctx, reqbufs); |
| } |
| |
| static int vidioc_querybuf(struct file *file, void *priv, |
| struct v4l2_buffer *buf) |
| { |
| struct m2mtest_ctx *ctx = file2ctx(file); |
| |
| return v4l2_m2m_querybuf(file, ctx->m2m_ctx, buf); |
| } |
| |
| static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf) |
| { |
| struct m2mtest_ctx *ctx = file2ctx(file); |
| |
| return v4l2_m2m_qbuf(file, ctx->m2m_ctx, buf); |
| } |
| |
| static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *buf) |
| { |
| struct m2mtest_ctx *ctx = file2ctx(file); |
| |
| return v4l2_m2m_dqbuf(file, ctx->m2m_ctx, buf); |
| } |
| |
| static int vidioc_streamon(struct file *file, void *priv, |
| enum v4l2_buf_type type) |
| { |
| struct m2mtest_ctx *ctx = file2ctx(file); |
| |
| return v4l2_m2m_streamon(file, ctx->m2m_ctx, type); |
| } |
| |
| static int vidioc_streamoff(struct file *file, void *priv, |
| enum v4l2_buf_type type) |
| { |
| struct m2mtest_ctx *ctx = file2ctx(file); |
| |
| return v4l2_m2m_streamoff(file, ctx->m2m_ctx, type); |
| } |
| |
| static int m2mtest_s_ctrl(struct v4l2_ctrl *ctrl) |
| { |
| struct m2mtest_ctx *ctx = |
| container_of(ctrl->handler, struct m2mtest_ctx, hdl); |
| |
| switch (ctrl->id) { |
| case V4L2_CID_HFLIP: |
| if (ctrl->val) |
| ctx->mode |= MEM2MEM_HFLIP; |
| else |
| ctx->mode &= ~MEM2MEM_HFLIP; |
| break; |
| |
| case V4L2_CID_VFLIP: |
| if (ctrl->val) |
| ctx->mode |= MEM2MEM_VFLIP; |
| else |
| ctx->mode &= ~MEM2MEM_VFLIP; |
| break; |
| |
| case V4L2_CID_TRANS_TIME_MSEC: |
| ctx->transtime = ctrl->val; |
| break; |
| |
| case V4L2_CID_TRANS_NUM_BUFS: |
| ctx->translen = ctrl->val; |
| break; |
| |
| default: |
| v4l2_err(&ctx->dev->v4l2_dev, "Invalid control\n"); |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| static const struct v4l2_ctrl_ops m2mtest_ctrl_ops = { |
| .s_ctrl = m2mtest_s_ctrl, |
| }; |
| |
| |
| static const struct v4l2_ioctl_ops m2mtest_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, |
| .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, |
| .vidioc_unsubscribe_event = v4l2_event_unsubscribe, |
| }; |
| |
| |
| /* |
| * Queue operations |
| */ |
| |
| static int m2mtest_queue_setup(struct vb2_queue *vq, |
| const struct v4l2_format *fmt, |
| unsigned int *nbuffers, unsigned int *nplanes, |
| unsigned int sizes[], void *alloc_ctxs[]) |
| { |
| struct m2mtest_ctx *ctx = vb2_get_drv_priv(vq); |
| struct m2mtest_q_data *q_data; |
| unsigned int size, count = *nbuffers; |
| |
| q_data = get_q_data(ctx, vq->type); |
| |
| size = q_data->width * q_data->height * q_data->fmt->depth >> 3; |
| |
| while (size * count > MEM2MEM_VID_MEM_LIMIT) |
| (count)--; |
| |
| *nplanes = 1; |
| *nbuffers = count; |
| sizes[0] = size; |
| |
| /* |
| * videobuf2-vmalloc allocator is context-less so no need to set |
| * alloc_ctxs array. |
| */ |
| |
| dprintk(ctx->dev, "get %d buffer(s) of size %d each.\n", count, size); |
| |
| return 0; |
| } |
| |
| static int m2mtest_buf_prepare(struct vb2_buffer *vb) |
| { |
| struct m2mtest_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue); |
| struct m2mtest_q_data *q_data; |
| |
| dprintk(ctx->dev, "type: %d\n", vb->vb2_queue->type); |
| |
| q_data = get_q_data(ctx, 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 m2mtest_buf_queue(struct vb2_buffer *vb) |
| { |
| struct m2mtest_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue); |
| v4l2_m2m_buf_queue(ctx->m2m_ctx, vb); |
| } |
| |
| static void m2mtest_wait_prepare(struct vb2_queue *q) |
| { |
| struct m2mtest_ctx *ctx = vb2_get_drv_priv(q); |
| m2mtest_unlock(ctx); |
| } |
| |
| static void m2mtest_wait_finish(struct vb2_queue *q) |
| { |
| struct m2mtest_ctx *ctx = vb2_get_drv_priv(q); |
| m2mtest_lock(ctx); |
| } |
| |
| static struct vb2_ops m2mtest_qops = { |
| .queue_setup = m2mtest_queue_setup, |
| .buf_prepare = m2mtest_buf_prepare, |
| .buf_queue = m2mtest_buf_queue, |
| .wait_prepare = m2mtest_wait_prepare, |
| .wait_finish = m2mtest_wait_finish, |
| }; |
| |
| static int queue_init(void *priv, struct vb2_queue *src_vq, struct vb2_queue *dst_vq) |
| { |
| struct m2mtest_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; |
| src_vq->drv_priv = ctx; |
| src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer); |
| src_vq->ops = &m2mtest_qops; |
| src_vq->mem_ops = &vb2_vmalloc_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; |
| dst_vq->drv_priv = ctx; |
| dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer); |
| dst_vq->ops = &m2mtest_qops; |
| dst_vq->mem_ops = &vb2_vmalloc_memops; |
| |
| return vb2_queue_init(dst_vq); |
| } |
| |
| static const struct v4l2_ctrl_config m2mtest_ctrl_trans_time_msec = { |
| .ops = &m2mtest_ctrl_ops, |
| .id = V4L2_CID_TRANS_TIME_MSEC, |
| .name = "Transaction Time (msec)", |
| .type = V4L2_CTRL_TYPE_INTEGER, |
| .def = 1001, |
| .min = 1, |
| .max = 10001, |
| .step = 100, |
| }; |
| |
| static const struct v4l2_ctrl_config m2mtest_ctrl_trans_num_bufs = { |
| .ops = &m2mtest_ctrl_ops, |
| .id = V4L2_CID_TRANS_NUM_BUFS, |
| .name = "Buffers Per Transaction", |
| .type = V4L2_CTRL_TYPE_INTEGER, |
| .def = 1, |
| .min = 1, |
| .max = MEM2MEM_DEF_NUM_BUFS, |
| .step = 1, |
| }; |
| |
| /* |
| * File operations |
| */ |
| static int m2mtest_open(struct file *file) |
| { |
| struct m2mtest_dev *dev = video_drvdata(file); |
| struct m2mtest_ctx *ctx = NULL; |
| struct v4l2_ctrl_handler *hdl; |
| |
| ctx = kzalloc(sizeof *ctx, GFP_KERNEL); |
| if (!ctx) |
| return -ENOMEM; |
| |
| v4l2_fh_init(&ctx->fh, video_devdata(file)); |
| file->private_data = &ctx->fh; |
| ctx->dev = dev; |
| hdl = &ctx->hdl; |
| v4l2_ctrl_handler_init(hdl, 4); |
| v4l2_ctrl_new_std(hdl, &m2mtest_ctrl_ops, V4L2_CID_HFLIP, 0, 1, 1, 0); |
| v4l2_ctrl_new_std(hdl, &m2mtest_ctrl_ops, V4L2_CID_VFLIP, 0, 1, 1, 0); |
| v4l2_ctrl_new_custom(hdl, &m2mtest_ctrl_trans_time_msec, NULL); |
| v4l2_ctrl_new_custom(hdl, &m2mtest_ctrl_trans_num_bufs, NULL); |
| if (hdl->error) { |
| int err = hdl->error; |
| |
| v4l2_ctrl_handler_free(hdl); |
| return err; |
| } |
| ctx->fh.ctrl_handler = hdl; |
| v4l2_ctrl_handler_setup(hdl); |
| |
| ctx->q_data[V4L2_M2M_SRC].fmt = &formats[0]; |
| ctx->q_data[V4L2_M2M_SRC].width = 640; |
| ctx->q_data[V4L2_M2M_SRC].height = 480; |
| ctx->q_data[V4L2_M2M_SRC].sizeimage = |
| ctx->q_data[V4L2_M2M_SRC].width * |
| ctx->q_data[V4L2_M2M_SRC].height * |
| (ctx->q_data[V4L2_M2M_SRC].fmt->depth >> 3); |
| ctx->q_data[V4L2_M2M_DST] = ctx->q_data[V4L2_M2M_SRC]; |
| ctx->colorspace = V4L2_COLORSPACE_REC709; |
| |
| ctx->m2m_ctx = v4l2_m2m_ctx_init(dev->m2m_dev, ctx, &queue_init); |
| |
| if (IS_ERR(ctx->m2m_ctx)) { |
| int ret = PTR_ERR(ctx->m2m_ctx); |
| |
| v4l2_ctrl_handler_free(hdl); |
| kfree(ctx); |
| return ret; |
| } |
| |
| v4l2_fh_add(&ctx->fh); |
| atomic_inc(&dev->num_inst); |
| |
| dprintk(dev, "Created instance %p, m2m_ctx: %p\n", ctx, ctx->m2m_ctx); |
| |
| return 0; |
| } |
| |
| static int m2mtest_release(struct file *file) |
| { |
| struct m2mtest_dev *dev = video_drvdata(file); |
| struct m2mtest_ctx *ctx = file2ctx(file); |
| |
| dprintk(dev, "Releasing instance %p\n", ctx); |
| |
| v4l2_fh_del(&ctx->fh); |
| v4l2_fh_exit(&ctx->fh); |
| v4l2_ctrl_handler_free(&ctx->hdl); |
| v4l2_m2m_ctx_release(ctx->m2m_ctx); |
| kfree(ctx); |
| |
| atomic_dec(&dev->num_inst); |
| |
| return 0; |
| } |
| |
| static unsigned int m2mtest_poll(struct file *file, |
| struct poll_table_struct *wait) |
| { |
| struct m2mtest_ctx *ctx = file2ctx(file); |
| |
| return v4l2_m2m_poll(file, ctx->m2m_ctx, wait); |
| } |
| |
| static int m2mtest_mmap(struct file *file, struct vm_area_struct *vma) |
| { |
| struct m2mtest_ctx *ctx = file2ctx(file); |
| |
| return v4l2_m2m_mmap(file, ctx->m2m_ctx, vma); |
| } |
| |
| static const struct v4l2_file_operations m2mtest_fops = { |
| .owner = THIS_MODULE, |
| .open = m2mtest_open, |
| .release = m2mtest_release, |
| .poll = m2mtest_poll, |
| .unlocked_ioctl = video_ioctl2, |
| .mmap = m2mtest_mmap, |
| }; |
| |
| static struct video_device m2mtest_videodev = { |
| .name = MEM2MEM_NAME, |
| .fops = &m2mtest_fops, |
| .ioctl_ops = &m2mtest_ioctl_ops, |
| .minor = -1, |
| .release = video_device_release, |
| }; |
| |
| static struct v4l2_m2m_ops m2m_ops = { |
| .device_run = device_run, |
| .job_ready = job_ready, |
| .job_abort = job_abort, |
| .lock = m2mtest_lock, |
| .unlock = m2mtest_unlock, |
| }; |
| |
| static int m2mtest_probe(struct platform_device *pdev) |
| { |
| struct m2mtest_dev *dev; |
| struct video_device *vfd; |
| int ret; |
| |
| dev = kzalloc(sizeof *dev, GFP_KERNEL); |
| if (!dev) |
| return -ENOMEM; |
| |
| spin_lock_init(&dev->irqlock); |
| |
| ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev); |
| if (ret) |
| goto free_dev; |
| |
| atomic_set(&dev->num_inst, 0); |
| mutex_init(&dev->dev_mutex); |
| |
| vfd = video_device_alloc(); |
| if (!vfd) { |
| v4l2_err(&dev->v4l2_dev, "Failed to allocate video device\n"); |
| ret = -ENOMEM; |
| goto unreg_dev; |
| } |
| |
| *vfd = m2mtest_videodev; |
| /* Locking in file operations other than ioctl should be done |
| by the driver, not the V4L2 core. |
| This driver needs auditing so that this flag can be removed. */ |
| set_bit(V4L2_FL_LOCK_ALL_FOPS, &vfd->flags); |
| vfd->lock = &dev->dev_mutex; |
| |
| ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0); |
| if (ret) { |
| v4l2_err(&dev->v4l2_dev, "Failed to register video device\n"); |
| goto rel_vdev; |
| } |
| |
| video_set_drvdata(vfd, dev); |
| snprintf(vfd->name, sizeof(vfd->name), "%s", m2mtest_videodev.name); |
| dev->vfd = vfd; |
| v4l2_info(&dev->v4l2_dev, MEM2MEM_TEST_MODULE_NAME |
| "Device registered as /dev/video%d\n", vfd->num); |
| |
| setup_timer(&dev->timer, device_isr, (long)dev); |
| platform_set_drvdata(pdev, dev); |
| |
| dev->m2m_dev = v4l2_m2m_init(&m2m_ops); |
| if (IS_ERR(dev->m2m_dev)) { |
| v4l2_err(&dev->v4l2_dev, "Failed to init mem2mem device\n"); |
| ret = PTR_ERR(dev->m2m_dev); |
| goto err_m2m; |
| } |
| |
| return 0; |
| |
| v4l2_m2m_release(dev->m2m_dev); |
| err_m2m: |
| video_unregister_device(dev->vfd); |
| rel_vdev: |
| video_device_release(vfd); |
| unreg_dev: |
| v4l2_device_unregister(&dev->v4l2_dev); |
| free_dev: |
| kfree(dev); |
| |
| return ret; |
| } |
| |
| static int m2mtest_remove(struct platform_device *pdev) |
| { |
| struct m2mtest_dev *dev = |
| (struct m2mtest_dev *)platform_get_drvdata(pdev); |
| |
| v4l2_info(&dev->v4l2_dev, "Removing " MEM2MEM_TEST_MODULE_NAME); |
| v4l2_m2m_release(dev->m2m_dev); |
| del_timer_sync(&dev->timer); |
| video_unregister_device(dev->vfd); |
| v4l2_device_unregister(&dev->v4l2_dev); |
| kfree(dev); |
| |
| return 0; |
| } |
| |
| static struct platform_driver m2mtest_pdrv = { |
| .probe = m2mtest_probe, |
| .remove = m2mtest_remove, |
| .driver = { |
| .name = MEM2MEM_NAME, |
| .owner = THIS_MODULE, |
| }, |
| }; |
| |
| static void __exit m2mtest_exit(void) |
| { |
| platform_driver_unregister(&m2mtest_pdrv); |
| platform_device_unregister(&m2mtest_pdev); |
| } |
| |
| static int __init m2mtest_init(void) |
| { |
| int ret; |
| |
| ret = platform_device_register(&m2mtest_pdev); |
| if (ret) |
| return ret; |
| |
| ret = platform_driver_register(&m2mtest_pdrv); |
| if (ret) |
| platform_device_unregister(&m2mtest_pdev); |
| |
| return 0; |
| } |
| |
| module_init(m2mtest_init); |
| module_exit(m2mtest_exit); |
| |