![Joe Perches](/assets/img/avatar_default.png)
Signed-off-by: Joe Perches <joe@perches.com> Acked-by: Jarod Wilson <jarod@redhat.com> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
1056 lines
24 KiB
C
1056 lines
24 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, <p.osciak@samsung.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/version.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/videobuf-vmalloc.h>
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#define MEM2MEM_TEST_MODULE_NAME "mem2mem-testdev"
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MODULE_DESCRIPTION("Virtual device for mem2mem framework testing");
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MODULE_AUTHOR("Pawel Osciak, <p.osciak@samsung.com>");
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MODULE_LICENSE("GPL");
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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 0x08 /* 8-alignment for dimensions */
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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 "m2m-testdev"
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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 1000
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/* Default number of buffers per transaction */
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#define MEM2MEM_DEF_TRANSLEN 1
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#define MEM2MEM_COLOR_STEP (0xff >> 4)
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#define MEM2MEM_NUM_TILES 8
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#define dprintk(dev, fmt, arg...) \
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v4l2_dbg(1, 1, &dev->v4l2_dev, "%s: " fmt, __func__, ## arg)
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void m2mtest_dev_release(struct device *dev)
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{}
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static struct platform_device m2mtest_pdev = {
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.name = MEM2MEM_NAME,
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.dev.release = m2mtest_dev_release,
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};
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struct m2mtest_fmt {
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char *name;
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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 m2mtest_fmt formats[] = {
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{
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.name = "RGB565 (BE)",
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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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.name = "4:2:2, packed, YUYV",
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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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/* Per-queue, driver-specific private data */
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struct m2mtest_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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struct m2mtest_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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/* Source and destination queue data */
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static struct m2mtest_q_data q_data[2];
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static struct m2mtest_q_data *get_q_data(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 &q_data[V4L2_M2M_SRC];
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case V4L2_BUF_TYPE_VIDEO_CAPTURE:
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return &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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#define V4L2_CID_TRANS_TIME_MSEC V4L2_CID_PRIVATE_BASE
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#define V4L2_CID_TRANS_NUM_BUFS (V4L2_CID_PRIVATE_BASE + 1)
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static struct v4l2_queryctrl m2mtest_ctrls[] = {
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{
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.id = V4L2_CID_TRANS_TIME_MSEC,
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.type = V4L2_CTRL_TYPE_INTEGER,
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.name = "Transaction time (msec)",
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.minimum = 1,
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.maximum = 10000,
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.step = 100,
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.default_value = 1000,
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.flags = 0,
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}, {
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.id = V4L2_CID_TRANS_NUM_BUFS,
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.type = V4L2_CTRL_TYPE_INTEGER,
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.name = "Buffers per transaction",
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.minimum = 1,
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.maximum = MEM2MEM_DEF_NUM_BUFS,
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.step = 1,
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.default_value = 1,
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.flags = 0,
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},
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};
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#define NUM_FORMATS ARRAY_SIZE(formats)
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static struct m2mtest_fmt *find_format(struct v4l2_format *f)
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{
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struct m2mtest_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 m2mtest_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 m2mtest_ctx {
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struct m2mtest_dev *dev;
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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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struct v4l2_m2m_ctx *m2m_ctx;
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};
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struct m2mtest_buffer {
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/* vb must be first! */
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struct videobuf_buffer vb;
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};
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static struct v4l2_queryctrl *get_ctrl(int id)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(m2mtest_ctrls); ++i) {
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if (id == m2mtest_ctrls[i].id)
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return &m2mtest_ctrls[i];
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}
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return NULL;
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}
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static int device_process(struct m2mtest_ctx *ctx,
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struct m2mtest_buffer *in_buf,
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struct m2mtest_buffer *out_buf)
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{
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struct m2mtest_dev *dev = ctx->dev;
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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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struct videobuf_queue *src_q;
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struct videobuf_queue *dst_q;
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src_q = v4l2_m2m_get_src_vq(ctx->m2m_ctx);
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dst_q = v4l2_m2m_get_dst_vq(ctx->m2m_ctx);
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p_in = videobuf_queue_to_vaddr(src_q, &in_buf->vb);
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p_out = videobuf_queue_to_vaddr(dst_q, &out_buf->vb);
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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 (in_buf->vb.size < out_buf->vb.size) {
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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 = (in_buf->vb.width * (q_data[V4L2_M2M_DST].fmt->depth >> 3))
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/ MEM2MEM_NUM_TILES;
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bytes_left = in_buf->vb.bytesperline - tile_w * MEM2MEM_NUM_TILES;
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w = 0;
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for (y = 0; y < in_buf->vb.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++ + 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++ - 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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return 0;
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}
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static void schedule_irq(struct m2mtest_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 m2mtest_ctx *ctx = priv;
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if (v4l2_m2m_num_src_bufs_ready(ctx->m2m_ctx) < ctx->translen
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|| v4l2_m2m_num_dst_bufs_ready(ctx->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 m2mtest_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 m2mtest_ctx *ctx = priv;
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struct m2mtest_dev *dev = ctx->dev;
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struct m2mtest_buffer *src_buf, *dst_buf;
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src_buf = v4l2_m2m_next_src_buf(ctx->m2m_ctx);
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dst_buf = v4l2_m2m_next_dst_buf(ctx->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 m2mtest_dev *m2mtest_dev = (struct m2mtest_dev *)priv;
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struct m2mtest_ctx *curr_ctx;
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struct m2mtest_buffer *src_buf, *dst_buf;
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unsigned long flags;
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curr_ctx = v4l2_m2m_get_curr_priv(m2mtest_dev->m2m_dev);
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if (NULL == curr_ctx) {
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printk(KERN_ERR
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"Instance released before the end of transaction\n");
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return;
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}
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src_buf = v4l2_m2m_src_buf_remove(curr_ctx->m2m_ctx);
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dst_buf = v4l2_m2m_dst_buf_remove(curr_ctx->m2m_ctx);
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curr_ctx->num_processed++;
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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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spin_lock_irqsave(&m2mtest_dev->irqlock, flags);
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src_buf->vb.state = dst_buf->vb.state = VIDEOBUF_DONE;
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wake_up(&src_buf->vb.done);
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wake_up(&dst_buf->vb.done);
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spin_unlock_irqrestore(&m2mtest_dev->irqlock, flags);
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v4l2_m2m_job_finish(m2mtest_dev->m2m_dev, curr_ctx->m2m_ctx);
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} else {
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spin_lock_irqsave(&m2mtest_dev->irqlock, flags);
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src_buf->vb.state = dst_buf->vb.state = VIDEOBUF_DONE;
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wake_up(&src_buf->vb.done);
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wake_up(&dst_buf->vb.done);
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spin_unlock_irqrestore(&m2mtest_dev->irqlock, flags);
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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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cap->bus_info[0] = 0;
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cap->version = KERNEL_VERSION(0, 1, 0);
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cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OUTPUT
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| V4L2_CAP_STREAMING;
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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 m2mtest_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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strncpy(f->description, fmt->name, sizeof(f->description) - 1);
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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)
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{
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return enum_fmt(f, MEM2MEM_OUTPUT);
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}
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static int vidioc_g_fmt(struct m2mtest_ctx *ctx, struct v4l2_format *f)
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{
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struct videobuf_queue *vq;
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struct m2mtest_q_data *q_data;
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vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
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if (!vq)
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return -EINVAL;
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q_data = get_q_data(f->type);
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f->fmt.pix.width = q_data->width;
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f->fmt.pix.height = q_data->height;
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f->fmt.pix.field = vq->field;
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f->fmt.pix.pixelformat = q_data->fmt->fourcc;
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f->fmt.pix.bytesperline = (q_data->width * q_data->fmt->depth) >> 3;
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f->fmt.pix.sizeimage = q_data->sizeimage;
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return 0;
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}
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static int vidioc_g_fmt_vid_out(struct file *file, void *priv,
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struct v4l2_format *f)
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{
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return vidioc_g_fmt(priv, f);
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}
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static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
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struct v4l2_format *f)
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{
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return vidioc_g_fmt(priv, f);
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}
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static int vidioc_try_fmt(struct v4l2_format *f, struct m2mtest_fmt *fmt)
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{
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enum v4l2_field field;
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field = f->fmt.pix.field;
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if (field == V4L2_FIELD_ANY)
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field = V4L2_FIELD_NONE;
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else if (V4L2_FIELD_NONE != field)
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return -EINVAL;
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/* V4L2 specification suggests the driver corrects the format struct
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* if any of the dimensions is unsupported */
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f->fmt.pix.field = field;
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if (f->fmt.pix.height < MIN_H)
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f->fmt.pix.height = MIN_H;
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else if (f->fmt.pix.height > MAX_H)
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f->fmt.pix.height = MAX_H;
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if (f->fmt.pix.width < MIN_W)
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f->fmt.pix.width = MIN_W;
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else if (f->fmt.pix.width > MAX_W)
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f->fmt.pix.width = MAX_W;
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f->fmt.pix.width &= ~DIM_ALIGN_MASK;
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f->fmt.pix.bytesperline = (f->fmt.pix.width * fmt->depth) >> 3;
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f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
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return 0;
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}
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static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
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struct v4l2_format *f)
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{
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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)) {
|
|
int ret = PTR_ERR(ctx->m2m_ctx);
|
|
|
|
kfree(ctx);
|
|
return ret;
|
|
}
|
|
|
|
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 = 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 = 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;
|
|
}
|
|
|
|
q_data[V4L2_M2M_SRC].fmt = &formats[0];
|
|
q_data[V4L2_M2M_DST].fmt = &formats[0];
|
|
|
|
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);
|
|
|