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86ab0b1c42
The v4l2_m2m_ops structures are only passed as the only argument to v4l2_m2m_init, which is declared as const. Thus the v4l2_m2m_ops structures themselves can be const. Done with the help of Coccinelle. // <smpl> @r disable optional_qualifier@ identifier i; position p; @@ static struct v4l2_m2m_ops i@p = { ... }; @ok1@ identifier r.i; position p; @@ v4l2_m2m_init(&i@p) @bad@ position p != {r.p,ok1.p}; identifier r.i; struct v4l2_m2m_ops e; @@ e@i@p @depends on !bad disable optional_qualifier@ identifier r.i; @@ static +const struct v4l2_m2m_ops i = { ... }; // </smpl> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
1092 lines
26 KiB
C
1092 lines
26 KiB
C
/*
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* A virtual v4l2-mem2mem example device.
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*
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* This is a virtual device driver for testing mem-to-mem videobuf framework.
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* It simulates a device that uses memory buffers for both source and
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* destination, processes the data and issues an "irq" (simulated by a timer).
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* The device is capable of multi-instance, multi-buffer-per-transaction
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* operation (via the mem2mem framework).
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*
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* Copyright (c) 2009-2010 Samsung Electronics Co., Ltd.
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* Pawel Osciak, <pawel@osciak.com>
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* Marek Szyprowski, <m.szyprowski@samsung.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version
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*/
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#include <linux/module.h>
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#include <linux/delay.h>
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#include <linux/fs.h>
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#include <linux/timer.h>
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#include <linux/sched.h>
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#include <linux/slab.h>
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#include <linux/platform_device.h>
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#include <media/v4l2-mem2mem.h>
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#include <media/v4l2-device.h>
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#include <media/v4l2-ioctl.h>
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#include <media/v4l2-ctrls.h>
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#include <media/v4l2-event.h>
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#include <media/videobuf2-vmalloc.h>
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MODULE_DESCRIPTION("Virtual device for mem2mem framework testing");
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MODULE_AUTHOR("Pawel Osciak, <pawel@osciak.com>");
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MODULE_LICENSE("GPL");
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MODULE_VERSION("0.1.1");
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MODULE_ALIAS("mem2mem_testdev");
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static unsigned debug;
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module_param(debug, uint, 0644);
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MODULE_PARM_DESC(debug, "activates debug info");
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#define MIN_W 32
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#define MIN_H 32
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#define MAX_W 640
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#define MAX_H 480
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#define DIM_ALIGN_MASK 7 /* 8-byte alignment for line length */
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/* Flags that indicate a format can be used for capture/output */
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#define MEM2MEM_CAPTURE (1 << 0)
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#define MEM2MEM_OUTPUT (1 << 1)
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#define MEM2MEM_NAME "vim2m"
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/* Per queue */
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#define MEM2MEM_DEF_NUM_BUFS VIDEO_MAX_FRAME
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/* In bytes, per queue */
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#define MEM2MEM_VID_MEM_LIMIT (16 * 1024 * 1024)
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/* Default transaction time in msec */
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#define MEM2MEM_DEF_TRANSTIME 40
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#define MEM2MEM_COLOR_STEP (0xff >> 4)
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#define MEM2MEM_NUM_TILES 8
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/* Flags that indicate processing mode */
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#define MEM2MEM_HFLIP (1 << 0)
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#define MEM2MEM_VFLIP (1 << 1)
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#define dprintk(dev, fmt, arg...) \
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v4l2_dbg(1, debug, &dev->v4l2_dev, "%s: " fmt, __func__, ## arg)
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static void vim2m_dev_release(struct device *dev)
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{}
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static struct platform_device vim2m_pdev = {
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.name = MEM2MEM_NAME,
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.dev.release = vim2m_dev_release,
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};
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struct vim2m_fmt {
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u32 fourcc;
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int depth;
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/* Types the format can be used for */
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u32 types;
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};
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static struct vim2m_fmt formats[] = {
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{
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.fourcc = V4L2_PIX_FMT_RGB565X, /* rrrrrggg gggbbbbb */
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.depth = 16,
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/* Both capture and output format */
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.types = MEM2MEM_CAPTURE | MEM2MEM_OUTPUT,
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},
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{
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.fourcc = V4L2_PIX_FMT_YUYV,
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.depth = 16,
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/* Output-only format */
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.types = MEM2MEM_OUTPUT,
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},
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};
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#define NUM_FORMATS ARRAY_SIZE(formats)
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/* Per-queue, driver-specific private data */
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struct vim2m_q_data {
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unsigned int width;
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unsigned int height;
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unsigned int sizeimage;
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unsigned int sequence;
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struct vim2m_fmt *fmt;
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};
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enum {
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V4L2_M2M_SRC = 0,
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V4L2_M2M_DST = 1,
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};
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#define V4L2_CID_TRANS_TIME_MSEC (V4L2_CID_USER_BASE + 0x1000)
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#define V4L2_CID_TRANS_NUM_BUFS (V4L2_CID_USER_BASE + 0x1001)
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static struct vim2m_fmt *find_format(struct v4l2_format *f)
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{
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struct vim2m_fmt *fmt;
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unsigned int k;
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for (k = 0; k < NUM_FORMATS; k++) {
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fmt = &formats[k];
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if (fmt->fourcc == f->fmt.pix.pixelformat)
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break;
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}
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if (k == NUM_FORMATS)
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return NULL;
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return &formats[k];
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}
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struct vim2m_dev {
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struct v4l2_device v4l2_dev;
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struct video_device vfd;
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atomic_t num_inst;
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struct mutex dev_mutex;
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spinlock_t irqlock;
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struct timer_list timer;
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struct v4l2_m2m_dev *m2m_dev;
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};
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struct vim2m_ctx {
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struct v4l2_fh fh;
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struct vim2m_dev *dev;
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struct v4l2_ctrl_handler hdl;
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/* Processed buffers in this transaction */
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u8 num_processed;
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/* Transaction length (i.e. how many buffers per transaction) */
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u32 translen;
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/* Transaction time (i.e. simulated processing time) in milliseconds */
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u32 transtime;
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/* Abort requested by m2m */
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int aborting;
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/* Processing mode */
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int mode;
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enum v4l2_colorspace colorspace;
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enum v4l2_ycbcr_encoding ycbcr_enc;
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enum v4l2_xfer_func xfer_func;
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enum v4l2_quantization quant;
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/* Source and destination queue data */
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struct vim2m_q_data q_data[2];
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};
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static inline struct vim2m_ctx *file2ctx(struct file *file)
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{
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return container_of(file->private_data, struct vim2m_ctx, fh);
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}
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static struct vim2m_q_data *get_q_data(struct vim2m_ctx *ctx,
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enum v4l2_buf_type type)
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{
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switch (type) {
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case V4L2_BUF_TYPE_VIDEO_OUTPUT:
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return &ctx->q_data[V4L2_M2M_SRC];
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case V4L2_BUF_TYPE_VIDEO_CAPTURE:
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return &ctx->q_data[V4L2_M2M_DST];
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default:
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BUG();
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}
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return NULL;
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}
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static int device_process(struct vim2m_ctx *ctx,
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struct vb2_v4l2_buffer *in_vb,
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struct vb2_v4l2_buffer *out_vb)
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{
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struct vim2m_dev *dev = ctx->dev;
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struct vim2m_q_data *q_data;
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u8 *p_in, *p_out;
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int x, y, t, w;
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int tile_w, bytes_left;
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int width, height, bytesperline;
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q_data = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT);
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width = q_data->width;
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height = q_data->height;
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bytesperline = (q_data->width * q_data->fmt->depth) >> 3;
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p_in = vb2_plane_vaddr(&in_vb->vb2_buf, 0);
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p_out = vb2_plane_vaddr(&out_vb->vb2_buf, 0);
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if (!p_in || !p_out) {
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v4l2_err(&dev->v4l2_dev,
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"Acquiring kernel pointers to buffers failed\n");
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return -EFAULT;
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}
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if (vb2_plane_size(&in_vb->vb2_buf, 0) >
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vb2_plane_size(&out_vb->vb2_buf, 0)) {
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v4l2_err(&dev->v4l2_dev, "Output buffer is too small\n");
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return -EINVAL;
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}
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tile_w = (width * (q_data[V4L2_M2M_DST].fmt->depth >> 3))
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/ MEM2MEM_NUM_TILES;
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bytes_left = bytesperline - tile_w * MEM2MEM_NUM_TILES;
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w = 0;
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out_vb->sequence =
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get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE)->sequence++;
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in_vb->sequence = q_data->sequence++;
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out_vb->vb2_buf.timestamp = in_vb->vb2_buf.timestamp;
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if (in_vb->flags & V4L2_BUF_FLAG_TIMECODE)
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out_vb->timecode = in_vb->timecode;
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out_vb->field = in_vb->field;
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out_vb->flags = in_vb->flags &
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(V4L2_BUF_FLAG_TIMECODE |
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V4L2_BUF_FLAG_KEYFRAME |
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V4L2_BUF_FLAG_PFRAME |
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V4L2_BUF_FLAG_BFRAME |
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V4L2_BUF_FLAG_TSTAMP_SRC_MASK);
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switch (ctx->mode) {
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case MEM2MEM_HFLIP | MEM2MEM_VFLIP:
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p_out += bytesperline * height - bytes_left;
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for (y = 0; y < height; ++y) {
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for (t = 0; t < MEM2MEM_NUM_TILES; ++t) {
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if (w & 0x1) {
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for (x = 0; x < tile_w; ++x)
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*--p_out = *p_in++ +
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MEM2MEM_COLOR_STEP;
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} else {
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for (x = 0; x < tile_w; ++x)
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*--p_out = *p_in++ -
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MEM2MEM_COLOR_STEP;
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}
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++w;
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}
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p_in += bytes_left;
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p_out -= bytes_left;
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}
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break;
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case MEM2MEM_HFLIP:
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for (y = 0; y < height; ++y) {
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p_out += MEM2MEM_NUM_TILES * tile_w;
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for (t = 0; t < MEM2MEM_NUM_TILES; ++t) {
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if (w & 0x01) {
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for (x = 0; x < tile_w; ++x)
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*--p_out = *p_in++ +
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MEM2MEM_COLOR_STEP;
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} else {
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for (x = 0; x < tile_w; ++x)
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*--p_out = *p_in++ -
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MEM2MEM_COLOR_STEP;
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}
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++w;
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}
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p_in += bytes_left;
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p_out += bytesperline;
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}
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break;
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case MEM2MEM_VFLIP:
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p_out += bytesperline * (height - 1);
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for (y = 0; y < height; ++y) {
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for (t = 0; t < MEM2MEM_NUM_TILES; ++t) {
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if (w & 0x1) {
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for (x = 0; x < tile_w; ++x)
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*p_out++ = *p_in++ +
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MEM2MEM_COLOR_STEP;
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} else {
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for (x = 0; x < tile_w; ++x)
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*p_out++ = *p_in++ -
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MEM2MEM_COLOR_STEP;
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}
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++w;
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}
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p_in += bytes_left;
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p_out += bytes_left - 2 * bytesperline;
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}
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break;
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default:
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for (y = 0; y < height; ++y) {
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for (t = 0; t < MEM2MEM_NUM_TILES; ++t) {
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if (w & 0x1) {
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for (x = 0; x < tile_w; ++x)
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*p_out++ = *p_in++ +
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MEM2MEM_COLOR_STEP;
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} else {
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for (x = 0; x < tile_w; ++x)
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*p_out++ = *p_in++ -
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MEM2MEM_COLOR_STEP;
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}
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++w;
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}
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p_in += bytes_left;
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p_out += bytes_left;
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}
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}
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return 0;
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}
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static void schedule_irq(struct vim2m_dev *dev, int msec_timeout)
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{
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dprintk(dev, "Scheduling a simulated irq\n");
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mod_timer(&dev->timer, jiffies + msecs_to_jiffies(msec_timeout));
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}
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/*
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* mem2mem callbacks
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*/
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/**
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* job_ready() - check whether an instance is ready to be scheduled to run
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*/
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static int job_ready(void *priv)
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{
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struct vim2m_ctx *ctx = priv;
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if (v4l2_m2m_num_src_bufs_ready(ctx->fh.m2m_ctx) < ctx->translen
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|| v4l2_m2m_num_dst_bufs_ready(ctx->fh.m2m_ctx) < ctx->translen) {
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dprintk(ctx->dev, "Not enough buffers available\n");
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return 0;
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}
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return 1;
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}
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static void job_abort(void *priv)
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{
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struct vim2m_ctx *ctx = priv;
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/* Will cancel the transaction in the next interrupt handler */
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ctx->aborting = 1;
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}
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/* device_run() - prepares and starts the device
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*
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* This simulates all the immediate preparations required before starting
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* a device. This will be called by the framework when it decides to schedule
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* a particular instance.
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*/
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static void device_run(void *priv)
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{
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struct vim2m_ctx *ctx = priv;
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struct vim2m_dev *dev = ctx->dev;
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struct vb2_v4l2_buffer *src_buf, *dst_buf;
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src_buf = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx);
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dst_buf = v4l2_m2m_next_dst_buf(ctx->fh.m2m_ctx);
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device_process(ctx, src_buf, dst_buf);
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/* Run a timer, which simulates a hardware irq */
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schedule_irq(dev, ctx->transtime);
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}
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static void device_isr(unsigned long priv)
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{
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struct vim2m_dev *vim2m_dev = (struct vim2m_dev *)priv;
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struct vim2m_ctx *curr_ctx;
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struct vb2_v4l2_buffer *src_vb, *dst_vb;
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unsigned long flags;
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curr_ctx = v4l2_m2m_get_curr_priv(vim2m_dev->m2m_dev);
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if (NULL == curr_ctx) {
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pr_err("Instance released before the end of transaction\n");
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return;
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}
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src_vb = v4l2_m2m_src_buf_remove(curr_ctx->fh.m2m_ctx);
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dst_vb = v4l2_m2m_dst_buf_remove(curr_ctx->fh.m2m_ctx);
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curr_ctx->num_processed++;
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spin_lock_irqsave(&vim2m_dev->irqlock, flags);
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v4l2_m2m_buf_done(src_vb, VB2_BUF_STATE_DONE);
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v4l2_m2m_buf_done(dst_vb, VB2_BUF_STATE_DONE);
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spin_unlock_irqrestore(&vim2m_dev->irqlock, flags);
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if (curr_ctx->num_processed == curr_ctx->translen
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|| curr_ctx->aborting) {
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dprintk(curr_ctx->dev, "Finishing transaction\n");
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curr_ctx->num_processed = 0;
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v4l2_m2m_job_finish(vim2m_dev->m2m_dev, curr_ctx->fh.m2m_ctx);
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} else {
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device_run(curr_ctx);
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}
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}
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/*
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* video ioctls
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*/
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static int vidioc_querycap(struct file *file, void *priv,
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struct v4l2_capability *cap)
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{
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strncpy(cap->driver, MEM2MEM_NAME, sizeof(cap->driver) - 1);
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strncpy(cap->card, MEM2MEM_NAME, sizeof(cap->card) - 1);
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snprintf(cap->bus_info, sizeof(cap->bus_info),
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"platform:%s", MEM2MEM_NAME);
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cap->device_caps = V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING;
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cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
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return 0;
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}
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static int enum_fmt(struct v4l2_fmtdesc *f, u32 type)
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{
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int i, num;
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struct vim2m_fmt *fmt;
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num = 0;
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for (i = 0; i < NUM_FORMATS; ++i) {
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if (formats[i].types & type) {
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/* index-th format of type type found ? */
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if (num == f->index)
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break;
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/* Correct type but haven't reached our index yet,
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* just increment per-type index */
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++num;
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}
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}
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if (i < NUM_FORMATS) {
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/* Format found */
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fmt = &formats[i];
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f->pixelformat = fmt->fourcc;
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return 0;
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}
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/* Format not found */
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return -EINVAL;
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}
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static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
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struct v4l2_fmtdesc *f)
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{
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return enum_fmt(f, MEM2MEM_CAPTURE);
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}
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static int vidioc_enum_fmt_vid_out(struct file *file, void *priv,
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struct v4l2_fmtdesc *f)
|
|
{
|
|
return enum_fmt(f, MEM2MEM_OUTPUT);
|
|
}
|
|
|
|
static int vidioc_g_fmt(struct vim2m_ctx *ctx, struct v4l2_format *f)
|
|
{
|
|
struct vb2_queue *vq;
|
|
struct vim2m_q_data *q_data;
|
|
|
|
vq = v4l2_m2m_get_vq(ctx->fh.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;
|
|
f->fmt.pix.xfer_func = ctx->xfer_func;
|
|
f->fmt.pix.ycbcr_enc = ctx->ycbcr_enc;
|
|
f->fmt.pix.quantization = ctx->quant;
|
|
|
|
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 vim2m_fmt *fmt)
|
|
{
|
|
/* V4L2 specification suggests the driver corrects the format struct
|
|
* if any of the dimensions is unsupported */
|
|
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;
|
|
f->fmt.pix.field = V4L2_FIELD_NONE;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
|
|
struct v4l2_format *f)
|
|
{
|
|
struct vim2m_fmt *fmt;
|
|
struct vim2m_ctx *ctx = file2ctx(file);
|
|
|
|
fmt = find_format(f);
|
|
if (!fmt) {
|
|
f->fmt.pix.pixelformat = formats[0].fourcc;
|
|
fmt = find_format(f);
|
|
}
|
|
if (!(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;
|
|
f->fmt.pix.xfer_func = ctx->xfer_func;
|
|
f->fmt.pix.ycbcr_enc = ctx->ycbcr_enc;
|
|
f->fmt.pix.quantization = ctx->quant;
|
|
|
|
return vidioc_try_fmt(f, fmt);
|
|
}
|
|
|
|
static int vidioc_try_fmt_vid_out(struct file *file, void *priv,
|
|
struct v4l2_format *f)
|
|
{
|
|
struct vim2m_fmt *fmt;
|
|
struct vim2m_ctx *ctx = file2ctx(file);
|
|
|
|
fmt = find_format(f);
|
|
if (!fmt) {
|
|
f->fmt.pix.pixelformat = formats[0].fourcc;
|
|
fmt = find_format(f);
|
|
}
|
|
if (!(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 vim2m_ctx *ctx, struct v4l2_format *f)
|
|
{
|
|
struct vim2m_q_data *q_data;
|
|
struct vb2_queue *vq;
|
|
|
|
vq = v4l2_m2m_get_vq(ctx->fh.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 vim2m_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;
|
|
ctx->xfer_func = f->fmt.pix.xfer_func;
|
|
ctx->ycbcr_enc = f->fmt.pix.ycbcr_enc;
|
|
ctx->quant = f->fmt.pix.quantization;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static int vim2m_s_ctrl(struct v4l2_ctrl *ctrl)
|
|
{
|
|
struct vim2m_ctx *ctx =
|
|
container_of(ctrl->handler, struct vim2m_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 vim2m_ctrl_ops = {
|
|
.s_ctrl = vim2m_s_ctrl,
|
|
};
|
|
|
|
|
|
static const struct v4l2_ioctl_ops vim2m_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 = v4l2_m2m_ioctl_reqbufs,
|
|
.vidioc_querybuf = v4l2_m2m_ioctl_querybuf,
|
|
.vidioc_qbuf = v4l2_m2m_ioctl_qbuf,
|
|
.vidioc_dqbuf = v4l2_m2m_ioctl_dqbuf,
|
|
.vidioc_prepare_buf = v4l2_m2m_ioctl_prepare_buf,
|
|
.vidioc_create_bufs = v4l2_m2m_ioctl_create_bufs,
|
|
.vidioc_expbuf = v4l2_m2m_ioctl_expbuf,
|
|
|
|
.vidioc_streamon = v4l2_m2m_ioctl_streamon,
|
|
.vidioc_streamoff = v4l2_m2m_ioctl_streamoff,
|
|
|
|
.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
|
|
.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
|
|
};
|
|
|
|
|
|
/*
|
|
* Queue operations
|
|
*/
|
|
|
|
static int vim2m_queue_setup(struct vb2_queue *vq,
|
|
unsigned int *nbuffers, unsigned int *nplanes,
|
|
unsigned int sizes[], struct device *alloc_devs[])
|
|
{
|
|
struct vim2m_ctx *ctx = vb2_get_drv_priv(vq);
|
|
struct vim2m_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)--;
|
|
*nbuffers = count;
|
|
|
|
if (*nplanes)
|
|
return sizes[0] < size ? -EINVAL : 0;
|
|
|
|
*nplanes = 1;
|
|
sizes[0] = size;
|
|
|
|
dprintk(ctx->dev, "get %d buffer(s) of size %d each.\n", count, size);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int vim2m_buf_prepare(struct vb2_buffer *vb)
|
|
{
|
|
struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
|
|
struct vim2m_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
|
|
struct vim2m_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 (V4L2_TYPE_IS_OUTPUT(vb->vb2_queue->type)) {
|
|
if (vbuf->field == V4L2_FIELD_ANY)
|
|
vbuf->field = V4L2_FIELD_NONE;
|
|
if (vbuf->field != V4L2_FIELD_NONE) {
|
|
dprintk(ctx->dev, "%s field isn't supported\n",
|
|
__func__);
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
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 vim2m_buf_queue(struct vb2_buffer *vb)
|
|
{
|
|
struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
|
|
struct vim2m_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
|
|
|
|
v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
|
|
}
|
|
|
|
static int vim2m_start_streaming(struct vb2_queue *q, unsigned count)
|
|
{
|
|
struct vim2m_ctx *ctx = vb2_get_drv_priv(q);
|
|
struct vim2m_q_data *q_data = get_q_data(ctx, q->type);
|
|
|
|
q_data->sequence = 0;
|
|
return 0;
|
|
}
|
|
|
|
static void vim2m_stop_streaming(struct vb2_queue *q)
|
|
{
|
|
struct vim2m_ctx *ctx = vb2_get_drv_priv(q);
|
|
struct vb2_v4l2_buffer *vbuf;
|
|
unsigned long flags;
|
|
|
|
for (;;) {
|
|
if (V4L2_TYPE_IS_OUTPUT(q->type))
|
|
vbuf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
|
|
else
|
|
vbuf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
|
|
if (vbuf == NULL)
|
|
return;
|
|
spin_lock_irqsave(&ctx->dev->irqlock, flags);
|
|
v4l2_m2m_buf_done(vbuf, VB2_BUF_STATE_ERROR);
|
|
spin_unlock_irqrestore(&ctx->dev->irqlock, flags);
|
|
}
|
|
}
|
|
|
|
static const struct vb2_ops vim2m_qops = {
|
|
.queue_setup = vim2m_queue_setup,
|
|
.buf_prepare = vim2m_buf_prepare,
|
|
.buf_queue = vim2m_buf_queue,
|
|
.start_streaming = vim2m_start_streaming,
|
|
.stop_streaming = vim2m_stop_streaming,
|
|
.wait_prepare = vb2_ops_wait_prepare,
|
|
.wait_finish = vb2_ops_wait_finish,
|
|
};
|
|
|
|
static int queue_init(void *priv, struct vb2_queue *src_vq, struct vb2_queue *dst_vq)
|
|
{
|
|
struct vim2m_ctx *ctx = priv;
|
|
int ret;
|
|
|
|
src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
|
|
src_vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
|
|
src_vq->drv_priv = ctx;
|
|
src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
|
|
src_vq->ops = &vim2m_qops;
|
|
src_vq->mem_ops = &vb2_vmalloc_memops;
|
|
src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
|
|
src_vq->lock = &ctx->dev->dev_mutex;
|
|
|
|
ret = vb2_queue_init(src_vq);
|
|
if (ret)
|
|
return ret;
|
|
|
|
dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
|
|
dst_vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
|
|
dst_vq->drv_priv = ctx;
|
|
dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
|
|
dst_vq->ops = &vim2m_qops;
|
|
dst_vq->mem_ops = &vb2_vmalloc_memops;
|
|
dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
|
|
dst_vq->lock = &ctx->dev->dev_mutex;
|
|
|
|
return vb2_queue_init(dst_vq);
|
|
}
|
|
|
|
static const struct v4l2_ctrl_config vim2m_ctrl_trans_time_msec = {
|
|
.ops = &vim2m_ctrl_ops,
|
|
.id = V4L2_CID_TRANS_TIME_MSEC,
|
|
.name = "Transaction Time (msec)",
|
|
.type = V4L2_CTRL_TYPE_INTEGER,
|
|
.def = MEM2MEM_DEF_TRANSTIME,
|
|
.min = 1,
|
|
.max = 10001,
|
|
.step = 1,
|
|
};
|
|
|
|
static const struct v4l2_ctrl_config vim2m_ctrl_trans_num_bufs = {
|
|
.ops = &vim2m_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 vim2m_open(struct file *file)
|
|
{
|
|
struct vim2m_dev *dev = video_drvdata(file);
|
|
struct vim2m_ctx *ctx = NULL;
|
|
struct v4l2_ctrl_handler *hdl;
|
|
int rc = 0;
|
|
|
|
if (mutex_lock_interruptible(&dev->dev_mutex))
|
|
return -ERESTARTSYS;
|
|
ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
|
|
if (!ctx) {
|
|
rc = -ENOMEM;
|
|
goto open_unlock;
|
|
}
|
|
|
|
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, &vim2m_ctrl_ops, V4L2_CID_HFLIP, 0, 1, 1, 0);
|
|
v4l2_ctrl_new_std(hdl, &vim2m_ctrl_ops, V4L2_CID_VFLIP, 0, 1, 1, 0);
|
|
v4l2_ctrl_new_custom(hdl, &vim2m_ctrl_trans_time_msec, NULL);
|
|
v4l2_ctrl_new_custom(hdl, &vim2m_ctrl_trans_num_bufs, NULL);
|
|
if (hdl->error) {
|
|
rc = hdl->error;
|
|
v4l2_ctrl_handler_free(hdl);
|
|
kfree(ctx);
|
|
goto open_unlock;
|
|
}
|
|
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->fh.m2m_ctx = v4l2_m2m_ctx_init(dev->m2m_dev, ctx, &queue_init);
|
|
|
|
if (IS_ERR(ctx->fh.m2m_ctx)) {
|
|
rc = PTR_ERR(ctx->fh.m2m_ctx);
|
|
|
|
v4l2_ctrl_handler_free(hdl);
|
|
v4l2_fh_exit(&ctx->fh);
|
|
kfree(ctx);
|
|
goto open_unlock;
|
|
}
|
|
|
|
v4l2_fh_add(&ctx->fh);
|
|
atomic_inc(&dev->num_inst);
|
|
|
|
dprintk(dev, "Created instance: %p, m2m_ctx: %p\n",
|
|
ctx, ctx->fh.m2m_ctx);
|
|
|
|
open_unlock:
|
|
mutex_unlock(&dev->dev_mutex);
|
|
return rc;
|
|
}
|
|
|
|
static int vim2m_release(struct file *file)
|
|
{
|
|
struct vim2m_dev *dev = video_drvdata(file);
|
|
struct vim2m_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);
|
|
mutex_lock(&dev->dev_mutex);
|
|
v4l2_m2m_ctx_release(ctx->fh.m2m_ctx);
|
|
mutex_unlock(&dev->dev_mutex);
|
|
kfree(ctx);
|
|
|
|
atomic_dec(&dev->num_inst);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct v4l2_file_operations vim2m_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = vim2m_open,
|
|
.release = vim2m_release,
|
|
.poll = v4l2_m2m_fop_poll,
|
|
.unlocked_ioctl = video_ioctl2,
|
|
.mmap = v4l2_m2m_fop_mmap,
|
|
};
|
|
|
|
static struct video_device vim2m_videodev = {
|
|
.name = MEM2MEM_NAME,
|
|
.vfl_dir = VFL_DIR_M2M,
|
|
.fops = &vim2m_fops,
|
|
.ioctl_ops = &vim2m_ioctl_ops,
|
|
.minor = -1,
|
|
.release = video_device_release_empty,
|
|
};
|
|
|
|
static const struct v4l2_m2m_ops m2m_ops = {
|
|
.device_run = device_run,
|
|
.job_ready = job_ready,
|
|
.job_abort = job_abort,
|
|
};
|
|
|
|
static int vim2m_probe(struct platform_device *pdev)
|
|
{
|
|
struct vim2m_dev *dev;
|
|
struct video_device *vfd;
|
|
int ret;
|
|
|
|
dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
|
|
if (!dev)
|
|
return -ENOMEM;
|
|
|
|
spin_lock_init(&dev->irqlock);
|
|
|
|
ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev);
|
|
if (ret)
|
|
return ret;
|
|
|
|
atomic_set(&dev->num_inst, 0);
|
|
mutex_init(&dev->dev_mutex);
|
|
|
|
dev->vfd = vim2m_videodev;
|
|
vfd = &dev->vfd;
|
|
vfd->lock = &dev->dev_mutex;
|
|
vfd->v4l2_dev = &dev->v4l2_dev;
|
|
|
|
ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0);
|
|
if (ret) {
|
|
v4l2_err(&dev->v4l2_dev, "Failed to register video device\n");
|
|
goto unreg_dev;
|
|
}
|
|
|
|
video_set_drvdata(vfd, dev);
|
|
snprintf(vfd->name, sizeof(vfd->name), "%s", vim2m_videodev.name);
|
|
v4l2_info(&dev->v4l2_dev,
|
|
"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:
|
|
v4l2_m2m_release(dev->m2m_dev);
|
|
video_unregister_device(&dev->vfd);
|
|
unreg_dev:
|
|
v4l2_device_unregister(&dev->v4l2_dev);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int vim2m_remove(struct platform_device *pdev)
|
|
{
|
|
struct vim2m_dev *dev = platform_get_drvdata(pdev);
|
|
|
|
v4l2_info(&dev->v4l2_dev, "Removing " MEM2MEM_NAME);
|
|
v4l2_m2m_release(dev->m2m_dev);
|
|
del_timer_sync(&dev->timer);
|
|
video_unregister_device(&dev->vfd);
|
|
v4l2_device_unregister(&dev->v4l2_dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver vim2m_pdrv = {
|
|
.probe = vim2m_probe,
|
|
.remove = vim2m_remove,
|
|
.driver = {
|
|
.name = MEM2MEM_NAME,
|
|
},
|
|
};
|
|
|
|
static void __exit vim2m_exit(void)
|
|
{
|
|
platform_driver_unregister(&vim2m_pdrv);
|
|
platform_device_unregister(&vim2m_pdev);
|
|
}
|
|
|
|
static int __init vim2m_init(void)
|
|
{
|
|
int ret;
|
|
|
|
ret = platform_device_register(&vim2m_pdev);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = platform_driver_register(&vim2m_pdrv);
|
|
if (ret)
|
|
platform_device_unregister(&vim2m_pdev);
|
|
|
|
return ret;
|
|
}
|
|
|
|
module_init(vim2m_init);
|
|
module_exit(vim2m_exit);
|