diff options
Diffstat (limited to 'drivers/media/video/mem2mem_testdev.c')
| -rw-r--r-- | drivers/media/video/mem2mem_testdev.c | 1120 |
1 files changed, 0 insertions, 1120 deletions
diff --git a/drivers/media/video/mem2mem_testdev.c b/drivers/media/video/mem2mem_testdev.c deleted file mode 100644 index 0b91a5cd38eb..000000000000 --- a/drivers/media/video/mem2mem_testdev.c +++ /dev/null @@ -1,1120 +0,0 @@ -/* - * 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_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 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); - |