> -----Original Message----- > From: Pawel Osciak [mailto:p.osciak@xxxxxxxxxxx] > Sent: Monday, April 19, 2010 6:00 PM > To: linux-media@xxxxxxxxxxxxxxx > Cc: p.osciak@xxxxxxxxxxx; m.szyprowski@xxxxxxxxxxx; > kyungmin.park@xxxxxxxxxxx; Hiremath, Vaibhav > Subject: [PATCH v4 2/2] v4l: Add a mem-to-mem videobuf framework test > device. > > This is a virtual device driver for testing the memory-to-memory framework. > > This virtual device uses in-memory buffers for both its source and > destination. > It is capable of multi-instance, multi-buffer-per-transaction operation > (via the mem2mem framework). [Hiremath, Vaibhav] Some minor comments - > > Signed-off-by: Pawel Osciak <p.osciak@xxxxxxxxxxx> > Signed-off-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx> > Reviewed-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx> > --- > drivers/media/video/Kconfig | 14 + > drivers/media/video/Makefile | 1 + > drivers/media/video/mem2mem_testdev.c | 1050 > +++++++++++++++++++++++++++++++++ > 3 files changed, 1065 insertions(+), 0 deletions(-) > create mode 100644 drivers/media/video/mem2mem_testdev.c > > diff --git a/drivers/media/video/Kconfig b/drivers/media/video/Kconfig > index 5fd041e..9a306a6 100644 > --- a/drivers/media/video/Kconfig > +++ b/drivers/media/video/Kconfig > @@ -1121,3 +1121,17 @@ menuconfig V4L_MEM2MEM_DRIVERS > use system memory for both source and destination buffers, as > opposed > to capture and output drivers, which use memory buffers for just > one of those. > + > +if V4L_MEM2MEM_DRIVERS > + > +config VIDEO_MEM2MEM_TESTDEV > + tristate "Virtual test device for mem2mem framework" > + depends on VIDEO_DEV && VIDEO_V4L2 > + select VIDEOBUF_VMALLOC > + select V4L2_MEM2MEM_DEV > + default n > + ---help--- > + This is a virtual test device for the memory-to-memory driver > + framework. > + > +endif # V4L_MEM2MEM_DRIVERS > diff --git a/drivers/media/video/Makefile b/drivers/media/video/Makefile > index e974680..2fa3c13 100644 > --- a/drivers/media/video/Makefile > +++ b/drivers/media/video/Makefile > @@ -151,6 +151,7 @@ obj-$(CONFIG_VIDEO_IVTV) += ivtv/ > obj-$(CONFIG_VIDEO_CX18) += cx18/ > > obj-$(CONFIG_VIDEO_VIVI) += vivi.o > +obj-$(CONFIG_VIDEO_MEM2MEM_TESTDEV) += mem2mem_testdev.o > obj-$(CONFIG_VIDEO_CX23885) += cx23885/ > > obj-$(CONFIG_VIDEO_OMAP2) += omap2cam.o > diff --git a/drivers/media/video/mem2mem_testdev.c > b/drivers/media/video/mem2mem_testdev.c > new file mode 100644 > index 0000000..d6e6ca9 > --- /dev/null > +++ b/drivers/media/video/mem2mem_testdev.c > @@ -0,0 +1,1050 @@ > +/* > + * 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, <p.osciak@xxxxxxxxxxx> > + * Marek Szyprowski, <m.szyprowski@xxxxxxxxxxx> > + * > + * 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/version.h> > +#include <linux/timer.h> > +#include <linux/sched.h> > + > +#include <linux/platform_device.h> > +#include <media/v4l2-mem2mem.h> > +#include <media/v4l2-device.h> > +#include <media/v4l2-ioctl.h> > +#include <media/videobuf-vmalloc.h> > + > +#define MEM2MEM_TEST_MODULE_NAME "mem2mem-testdev" > + > +MODULE_DESCRIPTION("Virtual device for mem2mem framework testing"); > +MODULE_AUTHOR("Pawel Osciak, <p.osciak@xxxxxxxxxxx>"); > +MODULE_LICENSE("GPL"); > + > + > +#define MIN_W 32 > +#define MIN_H 32 > +#define MAX_W 640 > +#define MAX_H 480 > +#define DIM_ALIGN_MASK 0x08 /* 8-alignment for dimensions */ > + > +/* 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 > + > +#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, > + }, > +}; > + > +/* Per-queue, driver-specific private data */ > +struct m2mtest_q_data > +{ [Hiremath, Vaibhav] Please run the checkpatch.pl, you should move starting brace to the above line. Thanks, Vaibhav > + unsigned int width; > + unsigned int height; > + unsigned int sizeimage; > + struct m2mtest_fmt *fmt; > +}; > + > +enum { > + V4L2_M2M_SRC = 0, > + V4L2_M2M_DST = 1, > +}; > + > +/* Source and destination queue data */ > +static struct m2mtest_q_data q_data[2]; > + > +static struct m2mtest_q_data *get_q_data(enum v4l2_buf_type type) > +{ > + switch (type) { > + case V4L2_BUF_TYPE_VIDEO_OUTPUT: > + return &q_data[V4L2_M2M_SRC]; > + case V4L2_BUF_TYPE_VIDEO_CAPTURE: > + return &q_data[V4L2_M2M_DST]; > + default: > + BUG(); > + } > + return NULL; > +} > + > +#define V4L2_CID_TRANS_TIME_MSEC V4L2_CID_PRIVATE_BASE > +#define V4L2_CID_TRANS_NUM_BUFS (V4L2_CID_PRIVATE_BASE + 1) > + > +static struct v4l2_queryctrl m2mtest_ctrls[] = { > + { > + .id = V4L2_CID_TRANS_TIME_MSEC, > + .type = V4L2_CTRL_TYPE_INTEGER, > + .name = "Transaction time (msec)", > + .minimum = 1, > + .maximum = 10000, > + .step = 100, > + .default_value = 1000, > + .flags = 0, > + }, { > + .id = V4L2_CID_TRANS_NUM_BUFS, > + .type = V4L2_CTRL_TYPE_INTEGER, > + .name = "Buffers per transaction", > + .minimum = 1, > + .maximum = MEM2MEM_DEF_NUM_BUFS, > + .step = 1, > + .default_value = 1, > + .flags = 0, > + }, > +}; > + > +#define NUM_FORMATS ARRAY_SIZE(formats) > + > +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 m2mtest_dev *dev; > + > + /* 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; > + > + struct v4l2_m2m_ctx *m2m_ctx; > +}; > + > +struct m2mtest_buffer { > + /* vb must be first! */ > + struct videobuf_buffer vb; > +}; > + > +static struct v4l2_queryctrl *get_ctrl(int id) > +{ > + int i; > + > + for (i = 0; i < ARRAY_SIZE(m2mtest_ctrls); ++i) { > + if (id == m2mtest_ctrls[i].id) > + return &m2mtest_ctrls[i]; > + } > + > + return NULL; > +} > + > +static int device_process(struct m2mtest_ctx *ctx, > + struct m2mtest_buffer *in_buf, > + struct m2mtest_buffer *out_buf) > +{ > + struct m2mtest_dev *dev = ctx->dev; > + u8 *p_in, *p_out; > + int x, y, t, w; > + int tile_w, bytes_left; > + struct videobuf_queue *src_q; > + struct videobuf_queue *dst_q; > + > + src_q = v4l2_m2m_get_src_vq(ctx->m2m_ctx); > + dst_q = v4l2_m2m_get_dst_vq(ctx->m2m_ctx); > + p_in = videobuf_queue_to_vmalloc(src_q, &in_buf->vb); > + p_out = videobuf_queue_to_vmalloc(dst_q, &out_buf->vb); > + if (!p_in || !p_out) { > + v4l2_err(&dev->v4l2_dev, > + "Acquiring kernel pointers to buffers failed\n"); > + return -EFAULT; > + } > + > + if (in_buf->vb.size < out_buf->vb.size) { > + v4l2_err(&dev->v4l2_dev, "Output buffer is too small\n"); > + return -EINVAL; > + } > + > + tile_w = (in_buf->vb.width * (q_data[V4L2_M2M_DST].fmt->depth >> 3)) > + / MEM2MEM_NUM_TILES; > + bytes_left = in_buf->vb.bytesperline - tile_w * MEM2MEM_NUM_TILES; > + w = 0; > + > + for (y = 0; y < in_buf->vb.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; > +} > + > +/* 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 m2mtest_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 m2mtest_buffer *src_buf, *dst_buf; > + 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_buf = v4l2_m2m_src_buf_remove(curr_ctx->m2m_ctx); > + dst_buf = v4l2_m2m_dst_buf_remove(curr_ctx->m2m_ctx); > + curr_ctx->num_processed++; > + > + if (curr_ctx->num_processed == curr_ctx->translen > + || curr_ctx->aborting) { > + dprintk(curr_ctx->dev, "Finishing transaction\n"); > + curr_ctx->num_processed = 0; > + spin_lock_irqsave(&m2mtest_dev->irqlock, flags); > + src_buf->vb.state = dst_buf->vb.state = VIDEOBUF_DONE; > + wake_up(&src_buf->vb.done); > + wake_up(&dst_buf->vb.done); > + spin_unlock_irqrestore(&m2mtest_dev->irqlock, flags); > + v4l2_m2m_job_finish(m2mtest_dev->m2m_dev, curr_ctx->m2m_ctx); > + } else { > + spin_lock_irqsave(&m2mtest_dev->irqlock, flags); > + src_buf->vb.state = dst_buf->vb.state = VIDEOBUF_DONE; > + wake_up(&src_buf->vb.done); > + wake_up(&dst_buf->vb.done); > + spin_unlock_irqrestore(&m2mtest_dev->irqlock, flags); > + 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); > + cap->bus_info[0] = 0; > + cap->version = KERNEL_VERSION(0, 1, 0); > + cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OUTPUT > + | V4L2_CAP_STREAMING; > + > + return 0; > +} > + > +static int enum_fmt(struct v4l2_fmtdesc *f, u32 type) > +{ > + int i, num; > + struct 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 videobuf_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(f->type); > + > + f->fmt.pix.width = q_data->width; > + f->fmt.pix.height = q_data->height; > + f->fmt.pix.field = vq->field; > + 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; > + > + 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 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 = priv; > + > + fmt = find_format(f); > + if (!fmt || !(fmt->types & MEM2MEM_CAPTURE)) { > + v4l2_err(&ctx->dev->v4l2_dev, > + "Fourcc format (0x%08x) invalid.\n", > + f->fmt.pix.pixelformat); > + return -EINVAL; > + } > + > + return vidioc_try_fmt(f, fmt); > +} > + > +static int vidioc_try_fmt_vid_out(struct file *file, void *priv, > + struct v4l2_format *f) > +{ > + struct m2mtest_fmt *fmt; > + struct m2mtest_ctx *ctx = priv; > + > + fmt = find_format(f); > + if (!fmt || !(fmt->types & MEM2MEM_OUTPUT)) { > + v4l2_err(&ctx->dev->v4l2_dev, > + "Fourcc format (0x%08x) invalid.\n", > + f->fmt.pix.pixelformat); > + return -EINVAL; > + } > + > + return vidioc_try_fmt(f, fmt); > +} > + > +static int vidioc_s_fmt(struct m2mtest_ctx *ctx, struct v4l2_format *f) > +{ > + struct m2mtest_q_data *q_data; > + struct videobuf_queue *vq; > + int ret = 0; > + > + 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; > + > + mutex_lock(&vq->vb_lock); > + > + if (videobuf_queue_is_busy(vq)) { > + v4l2_err(&ctx->dev->v4l2_dev, "%s queue busy\n", __func__); > + ret = -EBUSY; > + goto out; > + } > + > + 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; > + vq->field = f->fmt.pix.field; > + > + 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); > + > +out: > + mutex_unlock(&vq->vb_lock); > + return ret; > +} > + > +static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, > + struct v4l2_format *f) > +{ > + int ret; > + > + ret = vidioc_try_fmt_vid_cap(file, priv, f); > + if (ret) > + return ret; > + > + return vidioc_s_fmt(priv, f); > +} > + > +static int vidioc_s_fmt_vid_out(struct file *file, void *priv, > + struct v4l2_format *f) > +{ > + int ret; > + > + ret = vidioc_try_fmt_vid_out(file, priv, f); > + if (ret) > + return ret; > + > + return vidioc_s_fmt(priv, f); > +} > + > +static int vidioc_reqbufs(struct file *file, void *priv, > + struct v4l2_requestbuffers *reqbufs) > +{ > + struct m2mtest_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 m2mtest_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 m2mtest_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 m2mtest_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 m2mtest_ctx *ctx = priv; > + > + 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 = priv; > + > + return v4l2_m2m_streamoff(file, ctx->m2m_ctx, type); > +} > + > +static int vidioc_queryctrl(struct file *file, void *priv, > + struct v4l2_queryctrl *qc) > +{ > + struct v4l2_queryctrl *c; > + > + c = get_ctrl(qc->id); > + if (!c) > + return -EINVAL; > + > + *qc = *c; > + return 0; > +} > + > +static int vidioc_g_ctrl(struct file *file, void *priv, > + struct v4l2_control *ctrl) > +{ > + struct m2mtest_ctx *ctx = priv; > + > + switch (ctrl->id) { > + case V4L2_CID_TRANS_TIME_MSEC: > + ctrl->value = ctx->transtime; > + break; > + > + case V4L2_CID_TRANS_NUM_BUFS: > + ctrl->value = ctx->translen; > + break; > + > + default: > + v4l2_err(&ctx->dev->v4l2_dev, "Invalid control\n"); > + return -EINVAL; > + } > + > + return 0; > +} > + > +static int check_ctrl_val(struct m2mtest_ctx *ctx, struct v4l2_control > *ctrl) > +{ > + struct v4l2_queryctrl *c; > + > + c = get_ctrl(ctrl->id); > + if (!c) > + return -EINVAL; > + > + if (ctrl->value < c->minimum || ctrl->value > c->maximum) { > + v4l2_err(&ctx->dev->v4l2_dev, "Value out of range\n"); > + return -ERANGE; > + } > + > + return 0; > +} > + > +static int vidioc_s_ctrl(struct file *file, void *priv, > + struct v4l2_control *ctrl) > +{ > + struct m2mtest_ctx *ctx = priv; > + int ret = 0; > + > + ret = check_ctrl_val(ctx, ctrl); > + if (ret != 0) > + return ret; > + > + switch (ctrl->id) { > + case V4L2_CID_TRANS_TIME_MSEC: > + ctx->transtime = ctrl->value; > + break; > + > + case V4L2_CID_TRANS_NUM_BUFS: > + ctx->translen = ctrl->value; > + break; > + > + default: > + v4l2_err(&ctx->dev->v4l2_dev, "Invalid control\n"); > + return -EINVAL; > + } > + > + return 0; > +} > + > + > +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_queryctrl = vidioc_queryctrl, > + .vidioc_g_ctrl = vidioc_g_ctrl, > + .vidioc_s_ctrl = vidioc_s_ctrl, > +}; > + > + > +/* > + * Queue operations > + */ > + > +static void m2mtest_buf_release(struct videobuf_queue *vq, > + struct videobuf_buffer *vb) > +{ > + struct m2mtest_ctx *ctx = vq->priv_data; > + > + dprintk(ctx->dev, "type: %d, index: %d, state: %d\n", > + vq->type, vb->i, vb->state); > + > + videobuf_vmalloc_free(vb); > + vb->state = VIDEOBUF_NEEDS_INIT; > +} > + > +static int m2mtest_buf_setup(struct videobuf_queue *vq, unsigned int > *count, > + unsigned int *size) > +{ > + struct m2mtest_ctx *ctx = vq->priv_data; > + struct m2mtest_q_data *q_data; > + > + q_data = get_q_data(vq->type); > + > + *size = q_data->width * q_data->height * q_data->fmt->depth >> 3; > + dprintk(ctx->dev, "size:%d, w/h %d/%d, depth: %d\n", > + *size, q_data->width, q_data->height, q_data->fmt->depth); > + > + if (0 == *count) > + *count = MEM2MEM_DEF_NUM_BUFS; > + > + while (*size * *count > MEM2MEM_VID_MEM_LIMIT) > + (*count)--; > + > + v4l2_info(&ctx->dev->v4l2_dev, > + "%d buffers of size %d set up.\n", *count, *size); > + > + return 0; > +} > + > +static int m2mtest_buf_prepare(struct videobuf_queue *vq, > + struct videobuf_buffer *vb, > + enum v4l2_field field) > +{ > + struct m2mtest_ctx *ctx = vq->priv_data; > + struct m2mtest_q_data *q_data; > + int ret; > + > + dprintk(ctx->dev, "type: %d, index: %d, state: %d\n", > + vq->type, vb->i, vb->state); > + > + q_data = get_q_data(vq->type); > + > + if (vb->baddr) { > + /* User-provided buffer */ > + if (vb->bsize < q_data->sizeimage) { > + /* Buffer too small to fit a frame */ > + v4l2_err(&ctx->dev->v4l2_dev, > + "User-provided buffer too small\n"); > + return -EINVAL; > + } > + } else if (vb->state != VIDEOBUF_NEEDS_INIT > + && vb->bsize < q_data->sizeimage) { > + /* We provide the buffer, but it's already been initialized > + * and is too small */ > + return -EINVAL; > + } > + > + vb->width = q_data->width; > + vb->height = q_data->height; > + vb->bytesperline = (q_data->width * q_data->fmt->depth) >> 3; > + vb->size = q_data->sizeimage; > + vb->field = field; > + > + if (VIDEOBUF_NEEDS_INIT == vb->state) { > + ret = videobuf_iolock(vq, vb, NULL); > + if (ret) { > + v4l2_err(&ctx->dev->v4l2_dev, > + "Iolock failed\n"); > + goto fail; > + } > + } > + > + vb->state = VIDEOBUF_PREPARED; > + > + return 0; > +fail: > + m2mtest_buf_release(vq, vb); > + return ret; > +} > + > +static void m2mtest_buf_queue(struct videobuf_queue *vq, > + struct videobuf_buffer *vb) > +{ > + struct m2mtest_ctx *ctx = vq->priv_data; > + > + v4l2_m2m_buf_queue(ctx->m2m_ctx, vq, vb); > +} > + > +static struct videobuf_queue_ops m2mtest_qops = { > + .buf_setup = m2mtest_buf_setup, > + .buf_prepare = m2mtest_buf_prepare, > + .buf_queue = m2mtest_buf_queue, > + .buf_release = m2mtest_buf_release, > +}; > + > +static void queue_init(void *priv, struct videobuf_queue *vq, > + enum v4l2_buf_type type) > +{ > + struct m2mtest_ctx *ctx = priv; > + > + videobuf_queue_vmalloc_init(vq, &m2mtest_qops, ctx->dev->v4l2_dev.dev, > + &ctx->dev->irqlock, type, V4L2_FIELD_NONE, > + sizeof(struct m2mtest_buffer), priv); > +} > + > + > +/* > + * File operations > + */ > +static int m2mtest_open(struct file *file) > +{ > + struct m2mtest_dev *dev = video_drvdata(file); > + struct m2mtest_ctx *ctx = NULL; > + > + ctx = kzalloc(sizeof *ctx, GFP_KERNEL); > + if (!ctx) > + return -ENOMEM; > + > + file->private_data = ctx; > + ctx->dev = dev; > + ctx->translen = MEM2MEM_DEF_TRANSLEN; > + ctx->transtime = MEM2MEM_DEF_TRANSTIME; > + ctx->num_processed = 0; > + > + ctx->m2m_ctx = v4l2_m2m_ctx_init(ctx, dev->m2m_dev, queue_init); > + if (IS_ERR(ctx->m2m_ctx)) { > + kfree(ctx); > + return PTR_ERR(ctx->m2m_ctx); > + } > + > + 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 = file->private_data; > + > + dprintk(dev, "Releasing instance %p\n", ctx); > + > + 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 = (struct m2mtest_ctx *)file->private_data; > + > + 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 = (struct m2mtest_ctx *)file->private_data; > + > + 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, > + .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, > +}; > + > +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; > + > + 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; > + > +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); > + > -- > 1.7.1.rc1.12.ga601 -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
