diff options
Diffstat (limited to 'drivers/media/test-drivers/vim2m.c')
| -rw-r--r-- | drivers/media/test-drivers/vim2m.c | 1433 |
1 files changed, 1433 insertions, 0 deletions
diff --git a/drivers/media/test-drivers/vim2m.c b/drivers/media/test-drivers/vim2m.c new file mode 100644 index 000000000000..a776bb8e0e09 --- /dev/null +++ b/drivers/media/test-drivers/vim2m.c @@ -0,0 +1,1433 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * A virtual v4l2-mem2mem example device. + * + * This is a virtual device driver for testing mem-to-mem videobuf framework. + * It simulates a device that uses memory buffers for both source and + * destination, processes the data and issues an "irq" (simulated by a delayed + * workqueue). + * The device is capable of multi-instance, multi-buffer-per-transaction + * operation (via the mem2mem framework). + * + * Copyright (c) 2009-2010 Samsung Electronics Co., Ltd. + * Pawel Osciak, <pawel@osciak.com> + * Marek Szyprowski, <m.szyprowski@samsung.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the + * License, or (at your option) any later version + */ +#include <linux/module.h> +#include <linux/delay.h> +#include <linux/fs.h> +#include <linux/sched.h> +#include <linux/slab.h> + +#include <linux/platform_device.h> +#include <media/v4l2-mem2mem.h> +#include <media/v4l2-device.h> +#include <media/v4l2-ioctl.h> +#include <media/v4l2-ctrls.h> +#include <media/v4l2-event.h> +#include <media/videobuf2-vmalloc.h> + +MODULE_DESCRIPTION("Virtual device for mem2mem framework testing"); +MODULE_AUTHOR("Pawel Osciak, <pawel@osciak.com>"); +MODULE_LICENSE("GPL"); +MODULE_VERSION("0.2"); +MODULE_ALIAS("mem2mem_testdev"); + +static unsigned int debug; +module_param(debug, uint, 0644); +MODULE_PARM_DESC(debug, "debug level"); + +/* Default transaction time in msec */ +static unsigned int default_transtime = 40; /* Max 25 fps */ +module_param(default_transtime, uint, 0644); +MODULE_PARM_DESC(default_transtime, "default transaction time in ms"); + +#define MIN_W 32 +#define MIN_H 32 +#define MAX_W 640 +#define MAX_H 480 + +/* Pixel alignment for non-bayer formats */ +#define WIDTH_ALIGN 2 +#define HEIGHT_ALIGN 1 + +/* Pixel alignment for bayer formats */ +#define BAYER_WIDTH_ALIGN 2 +#define BAYER_HEIGHT_ALIGN 2 + +/* Flags that indicate a format can be used for capture/output */ +#define MEM2MEM_CAPTURE BIT(0) +#define MEM2MEM_OUTPUT BIT(1) + +#define MEM2MEM_NAME "vim2m" + +/* Per queue */ +#define MEM2MEM_DEF_NUM_BUFS VIDEO_MAX_FRAME +/* In bytes, per queue */ +#define MEM2MEM_VID_MEM_LIMIT (16 * 1024 * 1024) + +/* Flags that indicate processing mode */ +#define MEM2MEM_HFLIP BIT(0) +#define MEM2MEM_VFLIP BIT(1) + +#define dprintk(dev, lvl, fmt, arg...) \ + v4l2_dbg(lvl, debug, &(dev)->v4l2_dev, "%s: " fmt, __func__, ## arg) + +static void vim2m_dev_release(struct device *dev) +{} + +static struct platform_device vim2m_pdev = { + .name = MEM2MEM_NAME, + .dev.release = vim2m_dev_release, +}; + +struct vim2m_fmt { + u32 fourcc; + int depth; + /* Types the format can be used for */ + u32 types; +}; + +static struct vim2m_fmt formats[] = { + { + .fourcc = V4L2_PIX_FMT_RGB565, /* rrrrrggg gggbbbbb */ + .depth = 16, + .types = MEM2MEM_CAPTURE | MEM2MEM_OUTPUT, + }, { + .fourcc = V4L2_PIX_FMT_RGB565X, /* gggbbbbb rrrrrggg */ + .depth = 16, + .types = MEM2MEM_CAPTURE | MEM2MEM_OUTPUT, + }, { + .fourcc = V4L2_PIX_FMT_RGB24, + .depth = 24, + .types = MEM2MEM_CAPTURE | MEM2MEM_OUTPUT, + }, { + .fourcc = V4L2_PIX_FMT_BGR24, + .depth = 24, + .types = MEM2MEM_CAPTURE | MEM2MEM_OUTPUT, + }, { + .fourcc = V4L2_PIX_FMT_YUYV, + .depth = 16, + .types = MEM2MEM_CAPTURE, + }, { + .fourcc = V4L2_PIX_FMT_SBGGR8, + .depth = 8, + .types = MEM2MEM_CAPTURE, + }, { + .fourcc = V4L2_PIX_FMT_SGBRG8, + .depth = 8, + .types = MEM2MEM_CAPTURE, + }, { + .fourcc = V4L2_PIX_FMT_SGRBG8, + .depth = 8, + .types = MEM2MEM_CAPTURE, + }, { + .fourcc = V4L2_PIX_FMT_SRGGB8, + .depth = 8, + .types = MEM2MEM_CAPTURE, + }, +}; + +#define NUM_FORMATS ARRAY_SIZE(formats) + +/* Per-queue, driver-specific private data */ +struct vim2m_q_data { + unsigned int width; + unsigned int height; + unsigned int sizeimage; + unsigned int sequence; + struct vim2m_fmt *fmt; +}; + +enum { + V4L2_M2M_SRC = 0, + V4L2_M2M_DST = 1, +}; + +#define V4L2_CID_TRANS_TIME_MSEC (V4L2_CID_USER_BASE + 0x1000) +#define V4L2_CID_TRANS_NUM_BUFS (V4L2_CID_USER_BASE + 0x1001) + +static struct vim2m_fmt *find_format(u32 fourcc) +{ + struct vim2m_fmt *fmt; + unsigned int k; + + for (k = 0; k < NUM_FORMATS; k++) { + fmt = &formats[k]; + if (fmt->fourcc == fourcc) + break; + } + + if (k == NUM_FORMATS) + return NULL; + + return &formats[k]; +} + +static void get_alignment(u32 fourcc, + unsigned int *walign, unsigned int *halign) +{ + switch (fourcc) { + case V4L2_PIX_FMT_SBGGR8: + case V4L2_PIX_FMT_SGBRG8: + case V4L2_PIX_FMT_SGRBG8: + case V4L2_PIX_FMT_SRGGB8: + *walign = BAYER_WIDTH_ALIGN; + *halign = BAYER_HEIGHT_ALIGN; + return; + default: + *walign = WIDTH_ALIGN; + *halign = HEIGHT_ALIGN; + return; + } +} + +struct vim2m_dev { + struct v4l2_device v4l2_dev; + struct video_device vfd; +#ifdef CONFIG_MEDIA_CONTROLLER + struct media_device mdev; +#endif + + atomic_t num_inst; + struct mutex dev_mutex; + + struct v4l2_m2m_dev *m2m_dev; +}; + +struct vim2m_ctx { + struct v4l2_fh fh; + struct vim2m_dev *dev; + + struct v4l2_ctrl_handler hdl; + + /* Processed buffers in this transaction */ + u8 num_processed; + + /* Transaction length (i.e. how many buffers per transaction) */ + u32 translen; + /* Transaction time (i.e. simulated processing time) in milliseconds */ + u32 transtime; + + struct mutex vb_mutex; + struct delayed_work work_run; + + /* Abort requested by m2m */ + int aborting; + + /* Processing mode */ + int mode; + + enum v4l2_colorspace colorspace; + enum v4l2_ycbcr_encoding ycbcr_enc; + enum v4l2_xfer_func xfer_func; + enum v4l2_quantization quant; + + /* Source and destination queue data */ + struct vim2m_q_data q_data[2]; +}; + +static inline struct vim2m_ctx *file2ctx(struct file *file) +{ + return container_of(file->private_data, struct vim2m_ctx, fh); +} + +static struct vim2m_q_data *get_q_data(struct vim2m_ctx *ctx, + enum v4l2_buf_type type) +{ + switch (type) { + case V4L2_BUF_TYPE_VIDEO_OUTPUT: + return &ctx->q_data[V4L2_M2M_SRC]; + case V4L2_BUF_TYPE_VIDEO_CAPTURE: + return &ctx->q_data[V4L2_M2M_DST]; + default: + return NULL; + } +} + +static const char *type_name(enum v4l2_buf_type type) +{ + switch (type) { + case V4L2_BUF_TYPE_VIDEO_OUTPUT: + return "Output"; + case V4L2_BUF_TYPE_VIDEO_CAPTURE: + return "Capture"; + default: + return "Invalid"; + } +} + +#define CLIP(__color) \ + (u8)(((__color) > 0xff) ? 0xff : (((__color) < 0) ? 0 : (__color))) + +static void copy_line(struct vim2m_q_data *q_data_out, + u8 *src, u8 *dst, bool reverse) +{ + int x, depth = q_data_out->fmt->depth >> 3; + + if (!reverse) { + memcpy(dst, src, q_data_out->width * depth); + } else { + for (x = 0; x < q_data_out->width >> 1; x++) { + memcpy(dst, src, depth); + memcpy(dst + depth, src - depth, depth); + src -= depth << 1; + dst += depth << 1; + } + return; + } +} + +static void copy_two_pixels(struct vim2m_q_data *q_data_in, + struct vim2m_q_data *q_data_out, + u8 *src[2], u8 **dst, int ypos, bool reverse) +{ + struct vim2m_fmt *out = q_data_out->fmt; + struct vim2m_fmt *in = q_data_in->fmt; + u8 _r[2], _g[2], _b[2], *r, *g, *b; + int i; + + /* Step 1: read two consecutive pixels from src pointer */ + + r = _r; + g = _g; + b = _b; + + switch (in->fourcc) { + case V4L2_PIX_FMT_RGB565: /* rrrrrggg gggbbbbb */ + for (i = 0; i < 2; i++) { + u16 pix = le16_to_cpu(*(__le16 *)(src[i])); + + *r++ = (u8)(((pix & 0xf800) >> 11) << 3) | 0x07; + *g++ = (u8)((((pix & 0x07e0) >> 5)) << 2) | 0x03; + *b++ = (u8)((pix & 0x1f) << 3) | 0x07; + } + break; + case V4L2_PIX_FMT_RGB565X: /* gggbbbbb rrrrrggg */ + for (i = 0; i < 2; i++) { + u16 pix = be16_to_cpu(*(__be16 *)(src[i])); + + *r++ = (u8)(((pix & 0xf800) >> 11) << 3) | 0x07; + *g++ = (u8)((((pix & 0x07e0) >> 5)) << 2) | 0x03; + *b++ = (u8)((pix & 0x1f) << 3) | 0x07; + } + break; + default: + case V4L2_PIX_FMT_RGB24: + for (i = 0; i < 2; i++) { + *r++ = src[i][0]; + *g++ = src[i][1]; + *b++ = src[i][2]; + } + break; + case V4L2_PIX_FMT_BGR24: + for (i = 0; i < 2; i++) { + *b++ = src[i][0]; + *g++ = src[i][1]; + *r++ = src[i][2]; + } + break; + } + + /* Step 2: store two consecutive points, reversing them if needed */ + + r = _r; + g = _g; + b = _b; + + switch (out->fourcc) { + case V4L2_PIX_FMT_RGB565: /* rrrrrggg gggbbbbb */ + for (i = 0; i < 2; i++) { + u16 pix; + __le16 *dst_pix = (__le16 *)*dst; + + pix = ((*r << 8) & 0xf800) | ((*g << 3) & 0x07e0) | + (*b >> 3); + + *dst_pix = cpu_to_le16(pix); + + *dst += 2; + } + return; + case V4L2_PIX_FMT_RGB565X: /* gggbbbbb rrrrrggg */ + for (i = 0; i < 2; i++) { + u16 pix; + __be16 *dst_pix = (__be16 *)*dst; + + pix = ((*r << 8) & 0xf800) | ((*g << 3) & 0x07e0) | + (*b >> 3); + + *dst_pix = cpu_to_be16(pix); + + *dst += 2; + } + return; + case V4L2_PIX_FMT_RGB24: + for (i = 0; i < 2; i++) { + *(*dst)++ = *r++; + *(*dst)++ = *g++; + *(*dst)++ = *b++; + } + return; + case V4L2_PIX_FMT_BGR24: + for (i = 0; i < 2; i++) { + *(*dst)++ = *b++; + *(*dst)++ = *g++; + *(*dst)++ = *r++; + } + return; + case V4L2_PIX_FMT_YUYV: + default: + { + u8 y, y1, u, v; + + y = ((8453 * (*r) + 16594 * (*g) + 3223 * (*b) + + 524288) >> 15); + u = ((-4878 * (*r) - 9578 * (*g) + 14456 * (*b) + + 4210688) >> 15); + v = ((14456 * (*r++) - 12105 * (*g++) - 2351 * (*b++) + + 4210688) >> 15); + y1 = ((8453 * (*r) + 16594 * (*g) + 3223 * (*b) + + 524288) >> 15); + + *(*dst)++ = y; + *(*dst)++ = u; + + *(*dst)++ = y1; + *(*dst)++ = v; + return; + } + case V4L2_PIX_FMT_SBGGR8: + if (!(ypos & 1)) { + *(*dst)++ = *b; + *(*dst)++ = *++g; + } else { + *(*dst)++ = *g; + *(*dst)++ = *++r; + } + return; + case V4L2_PIX_FMT_SGBRG8: + if (!(ypos & 1)) { + *(*dst)++ = *g; + *(*dst)++ = *++b; + } else { + *(*dst)++ = *r; + *(*dst)++ = *++g; + } + return; + case V4L2_PIX_FMT_SGRBG8: + if (!(ypos & 1)) { + *(*dst)++ = *g; + *(*dst)++ = *++r; + } else { + *(*dst)++ = *b; + *(*dst)++ = *++g; + } + return; + case V4L2_PIX_FMT_SRGGB8: + if (!(ypos & 1)) { + *(*dst)++ = *r; + *(*dst)++ = *++g; + } else { + *(*dst)++ = *g; + *(*dst)++ = *++b; + } + return; + } +} + +static int device_process(struct vim2m_ctx *ctx, + struct vb2_v4l2_buffer *in_vb, + struct vb2_v4l2_buffer *out_vb) +{ + struct vim2m_dev *dev = ctx->dev; + struct vim2m_q_data *q_data_in, *q_data_out; + u8 *p_in, *p_line, *p_in_x[2], *p, *p_out; + unsigned int width, height, bytesperline, bytes_per_pixel; + unsigned int x, y, y_in, y_out, x_int, x_fract, x_err, x_offset; + int start, end, step; + + q_data_in = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT); + if (!q_data_in) + return 0; + bytesperline = (q_data_in->width * q_data_in->fmt->depth) >> 3; + bytes_per_pixel = q_data_in->fmt->depth >> 3; + + q_data_out = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE); + if (!q_data_out) + return 0; + + /* As we're doing scaling, use the output dimensions here */ + height = q_data_out->height; + width = q_data_out->width; + + p_in = vb2_plane_vaddr(&in_vb->vb2_buf, 0); + p_out = vb2_plane_vaddr(&out_vb->vb2_buf, 0); + if (!p_in || !p_out) { + v4l2_err(&dev->v4l2_dev, + "Acquiring kernel pointers to buffers failed\n"); + return -EFAULT; + } + + out_vb->sequence = q_data_out->sequence++; + in_vb->sequence = q_data_in->sequence++; + v4l2_m2m_buf_copy_metadata(in_vb, out_vb, true); + + if (ctx->mode & MEM2MEM_VFLIP) { + start = height - 1; + end = -1; + step = -1; + } else { + start = 0; + end = height; + step = 1; + } + y_out = 0; + + /* + * When format and resolution are identical, + * we can use a faster copy logic + */ + if (q_data_in->fmt->fourcc == q_data_out->fmt->fourcc && + q_data_in->width == q_data_out->width && + q_data_in->height == q_data_out->height) { + for (y = start; y != end; y += step, y_out++) { + p = p_in + (y * bytesperline); + if (ctx->mode & MEM2MEM_HFLIP) + p += bytesperline - (q_data_in->fmt->depth >> 3); + + copy_line(q_data_out, p, p_out, + ctx->mode & MEM2MEM_HFLIP); + + p_out += bytesperline; + } + return 0; + } + + /* Slower algorithm with format conversion, hflip, vflip and scaler */ + + /* To speed scaler up, use Bresenham for X dimension */ + x_int = q_data_in->width / q_data_out->width; + x_fract = q_data_in->width % q_data_out->width; + + for (y = start; y != end; y += step, y_out++) { + y_in = (y * q_data_in->height) / q_data_out->height; + x_offset = 0; + x_err = 0; + + p_line = p_in + (y_in * bytesperline); + if (ctx->mode & MEM2MEM_HFLIP) + p_line += bytesperline - (q_data_in->fmt->depth >> 3); + p_in_x[0] = p_line; + + for (x = 0; x < width >> 1; x++) { + x_offset += x_int; + x_err += x_fract; + if (x_err > width) { + x_offset++; + x_err -= width; + } + + if (ctx->mode & MEM2MEM_HFLIP) + p_in_x[1] = p_line - x_offset * bytes_per_pixel; + else + p_in_x[1] = p_line + x_offset * bytes_per_pixel; + + copy_two_pixels(q_data_in, q_data_out, + p_in_x, &p_out, y_out, + ctx->mode & MEM2MEM_HFLIP); + + /* Calculate the next p_in_x0 */ + x_offset += x_int; + x_err += x_fract; + if (x_err > width) { + x_offset++; + x_err -= width; + } + + if (ctx->mode & MEM2MEM_HFLIP) + p_in_x[0] = p_line - x_offset * bytes_per_pixel; + else + p_in_x[0] = p_line + x_offset * bytes_per_pixel; + } + } + + return 0; +} + +/* + * mem2mem callbacks + */ + +/* + * job_ready() - check whether an instance is ready to be scheduled to run + */ +static int job_ready(void *priv) +{ + struct vim2m_ctx *ctx = priv; + + if (v4l2_m2m_num_src_bufs_ready(ctx->fh.m2m_ctx) < ctx->translen + || v4l2_m2m_num_dst_bufs_ready(ctx->fh.m2m_ctx) < ctx->translen) { + dprintk(ctx->dev, 1, "Not enough buffers available\n"); + return 0; + } + + return 1; +} + +static void job_abort(void *priv) +{ + struct vim2m_ctx *ctx = priv; + + /* Will cancel the transaction in the next interrupt handler */ + ctx->aborting = 1; +} + +/* device_run() - prepares and starts the device + * + * This simulates all the immediate preparations required before starting + * a device. This will be called by the framework when it decides to schedule + * a particular instance. + */ +static void device_run(void *priv) +{ + struct vim2m_ctx *ctx = priv; + struct vb2_v4l2_buffer *src_buf, *dst_buf; + + src_buf = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx); + dst_buf = v4l2_m2m_next_dst_buf(ctx->fh.m2m_ctx); + + /* Apply request controls if any */ + v4l2_ctrl_request_setup(src_buf->vb2_buf.req_obj.req, + &ctx->hdl); + + device_process(ctx, src_buf, dst_buf); + + /* Complete request controls if any */ + v4l2_ctrl_request_complete(src_buf->vb2_buf.req_obj.req, + &ctx->hdl); + + /* Run delayed work, which simulates a hardware irq */ + schedule_delayed_work(&ctx->work_run, msecs_to_jiffies(ctx->transtime)); +} + +static void device_work(struct work_struct *w) +{ + struct vim2m_ctx *curr_ctx; + struct vim2m_dev *vim2m_dev; + struct vb2_v4l2_buffer *src_vb, *dst_vb; + + curr_ctx = container_of(w, struct vim2m_ctx, work_run.work); + + if (!curr_ctx) { + pr_err("Instance released before the end of transaction\n"); + return; + } + + vim2m_dev = curr_ctx->dev; + + src_vb = v4l2_m2m_src_buf_remove(curr_ctx->fh.m2m_ctx); + dst_vb = v4l2_m2m_dst_buf_remove(curr_ctx->fh.m2m_ctx); + + curr_ctx->num_processed++; + + v4l2_m2m_buf_done(src_vb, VB2_BUF_STATE_DONE); + v4l2_m2m_buf_done(dst_vb, VB2_BUF_STATE_DONE); + + if (curr_ctx->num_processed == curr_ctx->translen + || curr_ctx->aborting) { + dprintk(curr_ctx->dev, 2, "Finishing capture buffer fill\n"); + curr_ctx->num_processed = 0; + v4l2_m2m_job_finish(vim2m_dev->m2m_dev, curr_ctx->fh.m2m_ctx); + } else { + device_run(curr_ctx); + } +} + +/* + * video ioctls + */ +static int vidioc_querycap(struct file *file, void *priv, + struct v4l2_capability *cap) +{ + strscpy(cap->driver, MEM2MEM_NAME, sizeof(cap->driver)); + strscpy(cap->card, MEM2MEM_NAME, sizeof(cap->card)); + snprintf(cap->bus_info, sizeof(cap->bus_info), + "platform:%s", MEM2MEM_NAME); + return 0; +} + +static int enum_fmt(struct v4l2_fmtdesc *f, u32 type) +{ + int i, num; + struct vim2m_fmt *fmt; + + num = 0; + + for (i = 0; i < NUM_FORMATS; ++i) { + if (formats[i].types & type) { + /* index-th format of type type found ? */ + if (num == f->index) + break; + /* + * Correct type but haven't reached our index yet, + * just increment per-type index + */ + ++num; + } + } + + if (i < NUM_FORMATS) { + /* Format found */ + fmt = &formats[i]; + f->pixelformat = fmt->fourcc; + return 0; + } + + /* Format not found */ + return -EINVAL; +} + +static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_fmtdesc *f) +{ + return enum_fmt(f, MEM2MEM_CAPTURE); +} + +static int vidioc_enum_fmt_vid_out(struct file *file, void *priv, + struct v4l2_fmtdesc *f) +{ + return enum_fmt(f, MEM2MEM_OUTPUT); +} + +static int vidioc_enum_framesizes(struct file *file, void *priv, + struct v4l2_frmsizeenum *fsize) +{ + if (fsize->index != 0) + return -EINVAL; + + if (!find_format(fsize->pixel_format)) + return -EINVAL; + + fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE; + fsize->stepwise.min_width = MIN_W; + fsize->stepwise.min_height = MIN_H; + fsize->stepwise.max_width = MAX_W; + fsize->stepwise.max_height = MAX_H; + + get_alignment(fsize->pixel_format, + &fsize->stepwise.step_width, + &fsize->stepwise.step_height); + return 0; +} + +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); + if (!q_data) + return -EINVAL; + + 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) +{ + int walign, halign; + /* + * V4L2 specification specifies 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; + + get_alignment(f->fmt.pix.pixelformat, &walign, &halign); + f->fmt.pix.width &= ~(walign - 1); + f->fmt.pix.height &= ~(halign - 1); + 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->fmt.pix.pixelformat); + if (!fmt) { + f->fmt.pix.pixelformat = formats[0].fourcc; + fmt = find_format(f->fmt.pix.pixelformat); + } + 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->fmt.pix.pixelformat); + if (!fmt) { + f->fmt.pix.pixelformat = formats[0].fourcc; + fmt = find_format(f->fmt.pix.pixelformat); + } + 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->fmt.pix.pixelformat); + 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, 1, + "Format for type %s: %dx%d (%d bpp), fmt: %c%c%c%c\n", + type_name(f->type), q_data->width, q_data->height, + q_data->fmt->depth, + (q_data->fmt->fourcc & 0xff), + (q_data->fmt->fourcc >> 8) & 0xff, + (q_data->fmt->fourcc >> 16) & 0xff, + (q_data->fmt->fourcc >> 24) & 0xff); + + 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; + if (ctx->transtime < 1) + ctx->transtime = 1; + 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_enum_framesizes = vidioc_enum_framesizes, + .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); + if (!q_data) + return -EINVAL; + + 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, 1, "%s: get %d buffer(s) of size %d each.\n", + type_name(vq->type), count, size); + + return 0; +} + +static int vim2m_buf_out_validate(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); + + if (vbuf->field == V4L2_FIELD_ANY) + vbuf->field = V4L2_FIELD_NONE; + if (vbuf->field != V4L2_FIELD_NONE) { + dprintk(ctx->dev, 1, "%s field isn't supported\n", __func__); + return -EINVAL; + } + + return 0; +} + +static int vim2m_buf_prepare(struct vb2_buffer *vb) +{ + struct vim2m_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue); + struct vim2m_q_data *q_data; + + dprintk(ctx->dev, 2, "type: %s\n", type_name(vb->vb2_queue->type)); + + q_data = get_q_data(ctx, vb->vb2_queue->type); + if (!q_data) + return -EINVAL; + if (vb2_plane_size(vb, 0) < q_data->sizeimage) { + dprintk(ctx->dev, 1, + "%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 int count) +{ + struct vim2m_ctx *ctx = vb2_get_drv_priv(q); + struct vim2m_q_data *q_data = get_q_data(ctx, q->type); + + if (!q_data) + return -EINVAL; + + if (V4L2_TYPE_IS_OUTPUT(q->type)) + ctx->aborting = 0; + + 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; + + cancel_delayed_work_sync(&ctx->work_run); + + 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) + return; + v4l2_ctrl_request_complete(vbuf->vb2_buf.req_obj.req, + &ctx->hdl); + v4l2_m2m_buf_done(vbuf, VB2_BUF_STATE_ERROR); + } +} + +static void vim2m_buf_request_complete(struct vb2_buffer *vb) +{ + struct vim2m_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue); + + v4l2_ctrl_request_complete(vb->req_obj.req, &ctx->hdl); +} + +static const struct vb2_ops vim2m_qops = { + .queue_setup = vim2m_queue_setup, + .buf_out_validate = vim2m_buf_out_validate, + .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, + .buf_request_complete = vim2m_buf_request_complete, +}; + +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->vb_mutex; + src_vq->supports_requests = true; + + 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->vb_mutex; + + return vb2_queue_init(dst_vq); +} + +static 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, + .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); + + vim2m_ctrl_trans_time_msec.def = default_transtime; + 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); + + mutex_init(&ctx->vb_mutex); + INIT_DELAYED_WORK(&ctx->work_run, device_work); + + 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, 1, "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, 1, "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 void vim2m_device_release(struct video_device *vdev) +{ + struct vim2m_dev *dev = container_of(vdev, struct vim2m_dev, vfd); + + v4l2_device_unregister(&dev->v4l2_dev); + v4l2_m2m_release(dev->m2m_dev); +#ifdef CONFIG_MEDIA_CONTROLLER + media_device_cleanup(&dev->mdev); +#endif + kfree(dev); +} + +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 const struct video_device vim2m_videodev = { + .name = MEM2MEM_NAME, + .vfl_dir = VFL_DIR_M2M, + .fops = &vim2m_fops, + .ioctl_ops = &vim2m_ioctl_ops, + .minor = -1, + .release = vim2m_device_release, + .device_caps = V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING, +}; + +static const struct v4l2_m2m_ops m2m_ops = { + .device_run = device_run, + .job_ready = job_ready, + .job_abort = job_abort, +}; + +static const struct media_device_ops m2m_media_ops = { + .req_validate = vb2_request_validate, + .req_queue = v4l2_m2m_request_queue, +}; + +static int vim2m_probe(struct platform_device *pdev) +{ + struct vim2m_dev *dev; + struct video_device *vfd; + int ret; + + dev = kzalloc(sizeof(*dev), GFP_KERNEL); + if (!dev) + return -ENOMEM; + + ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev); + if (ret) + goto error_free; + + 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_VIDEO, 0); + if (ret) { + v4l2_err(&dev->v4l2_dev, "Failed to register video device\n"); + goto error_v4l2; + } + + video_set_drvdata(vfd, dev); + v4l2_info(&dev->v4l2_dev, + "Device registered as /dev/video%d\n", vfd->num); + + 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); + dev->m2m_dev = NULL; + goto error_dev; + } + +#ifdef CONFIG_MEDIA_CONTROLLER + dev->mdev.dev = &pdev->dev; + strscpy(dev->mdev.model, "vim2m", sizeof(dev->mdev.model)); + strscpy(dev->mdev.bus_info, "platform:vim2m", + sizeof(dev->mdev.bus_info)); + media_device_init(&dev->mdev); + dev->mdev.ops = &m2m_media_ops; + dev->v4l2_dev.mdev = &dev->mdev; + + ret = v4l2_m2m_register_media_controller(dev->m2m_dev, vfd, + MEDIA_ENT_F_PROC_VIDEO_SCALER); + if (ret) { + v4l2_err(&dev->v4l2_dev, "Failed to init mem2mem media controller\n"); + goto error_dev; + } + + ret = media_device_register(&dev->mdev); + if (ret) { + v4l2_err(&dev->v4l2_dev, "Failed to register mem2mem media device\n"); + goto error_m2m_mc; + } +#endif + return 0; + +#ifdef CONFIG_MEDIA_CONTROLLER +error_m2m_mc: + v4l2_m2m_unregister_media_controller(dev->m2m_dev); +#endif +error_dev: + video_unregister_device(&dev->vfd); + /* vim2m_device_release called by video_unregister_device to release various objects */ + return ret; +error_v4l2: + v4l2_device_unregister(&dev->v4l2_dev); +error_free: + kfree(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); + +#ifdef CONFIG_MEDIA_CONTROLLER + media_device_unregister(&dev->mdev); + v4l2_m2m_unregister_media_controller(dev->m2m_dev); +#endif + video_unregister_device(&dev->vfd); + + 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); |