- 根目录:
- drivers
- media
- video
- s5p-fimc
- fimc-capture.c
/*
* Samsung S5P SoC series camera interface (camera capture) driver
*
* Copyright (c) 2010 Samsung Electronics Co., Ltd
* Author: Sylwester Nawrocki, <s.nawrocki@samsung.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/version.h>
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/bug.h>
#include <linux/interrupt.h>
#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/list.h>
#include <linux/slab.h>
#include <linux/clk.h>
#include <linux/i2c.h>
#include <linux/videodev2.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-mem2mem.h>
#include <media/videobuf2-core.h>
#include <media/videobuf2-dma-contig.h>
#include "fimc-core.h"
static struct v4l2_subdev *fimc_subdev_register(struct fimc_dev *fimc,
struct s5p_fimc_isp_info *isp_info)
{
struct i2c_adapter *i2c_adap;
struct fimc_vid_cap *vid_cap = &fimc->vid_cap;
struct v4l2_subdev *sd = NULL;
i2c_adap = i2c_get_adapter(isp_info->i2c_bus_num);
if (!i2c_adap)
return ERR_PTR(-ENOMEM);
sd = v4l2_i2c_new_subdev_board(&vid_cap->v4l2_dev, i2c_adap,
isp_info->board_info, NULL);
if (!sd) {
v4l2_err(&vid_cap->v4l2_dev, "failed to acquire subdev\n");
return NULL;
}
v4l2_info(&vid_cap->v4l2_dev, "subdevice %s registered successfuly\n",
isp_info->board_info->type);
return sd;
}
static void fimc_subdev_unregister(struct fimc_dev *fimc)
{
struct fimc_vid_cap *vid_cap = &fimc->vid_cap;
struct i2c_client *client;
if (vid_cap->input_index < 0)
return; /* Subdevice already released or not registered. */
if (vid_cap->sd) {
v4l2_device_unregister_subdev(vid_cap->sd);
client = v4l2_get_subdevdata(vid_cap->sd);
i2c_unregister_device(client);
i2c_put_adapter(client->adapter);
vid_cap->sd = NULL;
}
vid_cap->input_index = -1;
}
/**
* fimc_subdev_attach - attach v4l2_subdev to camera host interface
*
* @fimc: FIMC device information
* @index: index to the array of available subdevices,
* -1 for full array search or non negative value
* to select specific subdevice
*/
static int fimc_subdev_attach(struct fimc_dev *fimc, int index)
{
struct fimc_vid_cap *vid_cap = &fimc->vid_cap;
struct s5p_platform_fimc *pdata = fimc->pdata;
struct s5p_fimc_isp_info *isp_info;
struct v4l2_subdev *sd;
int i;
for (i = 0; i < pdata->num_clients; ++i) {
isp_info = &pdata->isp_info[i];
if (index >= 0 && i != index)
continue;
sd = fimc_subdev_register(fimc, isp_info);
if (!IS_ERR_OR_NULL(sd)) {
vid_cap->sd = sd;
vid_cap->input_index = i;
return 0;
}
}
vid_cap->input_index = -1;
vid_cap->sd = NULL;
v4l2_err(&vid_cap->v4l2_dev, "fimc%d: sensor attach failed\n",
fimc->id);
return -ENODEV;
}
static int fimc_isp_subdev_init(struct fimc_dev *fimc, unsigned int index)
{
struct s5p_fimc_isp_info *isp_info;
struct s5p_platform_fimc *pdata = fimc->pdata;
int ret;
if (index >= pdata->num_clients)
return -EINVAL;
isp_info = &pdata->isp_info[index];
if (isp_info->clk_frequency)
clk_set_rate(fimc->clock[CLK_CAM], isp_info->clk_frequency);
ret = clk_enable(fimc->clock[CLK_CAM]);
if (ret)
return ret;
ret = fimc_subdev_attach(fimc, index);
if (ret)
return ret;
ret = fimc_hw_set_camera_polarity(fimc, isp_info);
if (ret)
return ret;
ret = v4l2_subdev_call(fimc->vid_cap.sd, core, s_power, 1);
if (!ret)
return ret;
/* enabling power failed so unregister subdev */
fimc_subdev_unregister(fimc);
v4l2_err(&fimc->vid_cap.v4l2_dev, "ISP initialization failed: %d\n",
ret);
return ret;
}
static int fimc_stop_capture(struct fimc_dev *fimc)
{
unsigned long flags;
struct fimc_vid_cap *cap;
struct fimc_vid_buffer *buf;
cap = &fimc->vid_cap;
if (!fimc_capture_active(fimc))
return 0;
spin_lock_irqsave(&fimc->slock, flags);
set_bit(ST_CAPT_SHUT, &fimc->state);
fimc_deactivate_capture(fimc);
spin_unlock_irqrestore(&fimc->slock, flags);
wait_event_timeout(fimc->irq_queue,
!test_bit(ST_CAPT_SHUT, &fimc->state),
FIMC_SHUTDOWN_TIMEOUT);
v4l2_subdev_call(cap->sd, video, s_stream, 0);
spin_lock_irqsave(&fimc->slock, flags);
fimc->state &= ~(1 << ST_CAPT_RUN | 1 << ST_CAPT_PEND |
1 << ST_CAPT_SHUT | 1 << ST_CAPT_STREAM);
fimc->vid_cap.active_buf_cnt = 0;
/* Release buffers that were enqueued in the driver by videobuf2. */
while (!list_empty(&cap->pending_buf_q)) {
buf = pending_queue_pop(cap);
vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
}
while (!list_empty(&cap->active_buf_q)) {
buf = active_queue_pop(cap);
vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
}
spin_unlock_irqrestore(&fimc->slock, flags);
dbg("state: 0x%lx", fimc->state);
return 0;
}
static int start_streaming(struct vb2_queue *q)
{
struct fimc_ctx *ctx = q->drv_priv;
struct fimc_dev *fimc = ctx->fimc_dev;
struct s5p_fimc_isp_info *isp_info;
int ret;
fimc_hw_reset(fimc);
ret = v4l2_subdev_call(fimc->vid_cap.sd, video, s_stream, 1);
if (ret && ret != -ENOIOCTLCMD)
return ret;
ret = fimc_prepare_config(ctx, ctx->state);
if (ret)
return ret;
isp_info = &fimc->pdata->isp_info[fimc->vid_cap.input_index];
fimc_hw_set_camera_type(fimc, isp_info);
fimc_hw_set_camera_source(fimc, isp_info);
fimc_hw_set_camera_offset(fimc, &ctx->s_frame);
if (ctx->state & FIMC_PARAMS) {
ret = fimc_set_scaler_info(ctx);
if (ret) {
err("Scaler setup error");
return ret;
}
fimc_hw_set_input_path(ctx);
fimc_hw_set_prescaler(ctx);
fimc_hw_set_mainscaler(ctx);
fimc_hw_set_target_format(ctx);
fimc_hw_set_rotation(ctx);
fimc_hw_set_effect(ctx);
}
fimc_hw_set_output_path(ctx);
fimc_hw_set_out_dma(ctx);
INIT_LIST_HEAD(&fimc->vid_cap.pending_buf_q);
INIT_LIST_HEAD(&fimc->vid_cap.active_buf_q);
fimc->vid_cap.active_buf_cnt = 0;
fimc->vid_cap.frame_count = 0;
fimc->vid_cap.buf_index = 0;
set_bit(ST_CAPT_PEND, &fimc->state);
return 0;
}
static int stop_streaming(struct vb2_queue *q)
{
struct fimc_ctx *ctx = q->drv_priv;
struct fimc_dev *fimc = ctx->fimc_dev;
if (!fimc_capture_active(fimc))
return -EINVAL;
return fimc_stop_capture(fimc);
}
static unsigned int get_plane_size(struct fimc_frame *fr, unsigned int plane)
{
if (!fr || plane >= fr->fmt->memplanes)
return 0;
dbg("%s: w: %d. h: %d. depth[%d]: %d",
__func__, fr->width, fr->height, plane, fr->fmt->depth[plane]);
return fr->f_width * fr->f_height * fr->fmt->depth[plane] / 8;
}
static int queue_setup(struct vb2_queue *vq, unsigned int *num_buffers,
unsigned int *num_planes, unsigned long sizes[],
void *allocators[])
{
struct fimc_ctx *ctx = vq->drv_priv;
struct fimc_fmt *fmt = ctx->d_frame.fmt;
int i;
if (!fmt)
return -EINVAL;
*num_planes = fmt->memplanes;
dbg("%s, buffer count=%d, plane count=%d",
__func__, *num_buffers, *num_planes);
for (i = 0; i < fmt->memplanes; i++) {
sizes[i] = get_plane_size(&ctx->d_frame, i);
dbg("plane: %u, plane_size: %lu", i, sizes[i]);
allocators[i] = ctx->fimc_dev->alloc_ctx;
}
return 0;
}
static int buffer_init(struct vb2_buffer *vb)
{
/* TODO: */
return 0;
}
static int buffer_prepare(struct vb2_buffer *vb)
{
struct vb2_queue *vq = vb->vb2_queue;
struct fimc_ctx *ctx = vq->drv_priv;
struct v4l2_device *v4l2_dev = &ctx->fimc_dev->m2m.v4l2_dev;
int i;
if (!ctx->d_frame.fmt || vq->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
return -EINVAL;
for (i = 0; i < ctx->d_frame.fmt->memplanes; i++) {
unsigned long size = get_plane_size(&ctx->d_frame, i);
if (vb2_plane_size(vb, i) < size) {
v4l2_err(v4l2_dev, "User buffer too small (%ld < %ld)\n",
vb2_plane_size(vb, i), size);
return -EINVAL;
}
vb2_set_plane_payload(vb, i, size);
}
return 0;
}
static void buffer_queue(struct vb2_buffer *vb)
{
struct fimc_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
struct fimc_dev *fimc = ctx->fimc_dev;
struct fimc_vid_buffer *buf
= container_of(vb, struct fimc_vid_buffer, vb);
struct fimc_vid_cap *vid_cap = &fimc->vid_cap;
unsigned long flags;
int min_bufs;
spin_lock_irqsave(&fimc->slock, flags);
fimc_prepare_addr(ctx, &buf->vb, &ctx->d_frame, &buf->paddr);
if (!test_bit(ST_CAPT_STREAM, &fimc->state)
&& vid_cap->active_buf_cnt < FIMC_MAX_OUT_BUFS) {
/* Setup the buffer directly for processing. */
int buf_id = (vid_cap->reqbufs_count == 1) ? -1 :
vid_cap->buf_index;
fimc_hw_set_output_addr(fimc, &buf->paddr, buf_id);
buf->index = vid_cap->buf_index;
active_queue_add(vid_cap, buf);
if (++vid_cap->buf_index >= FIMC_MAX_OUT_BUFS)
vid_cap->buf_index = 0;
} else {
fimc_pending_queue_add(vid_cap, buf);
}
min_bufs = vid_cap->reqbufs_count > 1 ? 2 : 1;
if (vid_cap->active_buf_cnt >= min_bufs &&
!test_and_set_bit(ST_CAPT_STREAM, &fimc->state))
fimc_activate_capture(ctx);
spin_unlock_irqrestore(&fimc->slock, flags);
}
static void fimc_lock(struct vb2_queue *vq)
{
struct fimc_ctx *ctx = vb2_get_drv_priv(vq);
mutex_lock(&ctx->fimc_dev->lock);
}
static void fimc_unlock(struct vb2_queue *vq)
{
struct fimc_ctx *ctx = vb2_get_drv_priv(vq);
mutex_unlock(&ctx->fimc_dev->lock);
}
static struct vb2_ops fimc_capture_qops = {
.queue_setup = queue_setup,
.buf_prepare = buffer_prepare,
.buf_queue = buffer_queue,
.buf_init = buffer_init,
.wait_prepare = fimc_unlock,
.wait_finish = fimc_lock,
.start_streaming = start_streaming,
.stop_streaming = stop_streaming,
};
static int fimc_capture_open(struct file *file)
{
struct fimc_dev *fimc = video_drvdata(file);
int ret = 0;
dbg("pid: %d, state: 0x%lx", task_pid_nr(current), fimc->state);
/* Return if the corresponding video mem2mem node is already opened. */
if (fimc_m2m_active(fimc))
return -EBUSY;
if (++fimc->vid_cap.refcnt == 1) {
ret = fimc_isp_subdev_init(fimc, 0);
if (ret) {
fimc->vid_cap.refcnt--;
return -EIO;
}
}
file->private_data = fimc->vid_cap.ctx;
return 0;
}
static int fimc_capture_close(struct file *file)
{
struct fimc_dev *fimc = video_drvdata(file);
dbg("pid: %d, state: 0x%lx", task_pid_nr(current), fimc->state);
if (--fimc->vid_cap.refcnt == 0) {
fimc_stop_capture(fimc);
vb2_queue_release(&fimc->vid_cap.vbq);
v4l2_err(&fimc->vid_cap.v4l2_dev, "releasing ISP\n");
v4l2_subdev_call(fimc->vid_cap.sd, core, s_power, 0);
clk_disable(fimc->clock[CLK_CAM]);
fimc_subdev_unregister(fimc);
}
return 0;
}
static unsigned int fimc_capture_poll(struct file *file,
struct poll_table_struct *wait)
{
struct fimc_ctx *ctx = file->private_data;
struct fimc_dev *fimc = ctx->fimc_dev;
return vb2_poll(&fimc->vid_cap.vbq, file, wait);
}
static int fimc_capture_mmap(struct file *file, struct vm_area_struct *vma)
{
struct fimc_ctx *ctx = file->private_data;
struct fimc_dev *fimc = ctx->fimc_dev;
return vb2_mmap(&fimc->vid_cap.vbq, vma);
}
/* video device file operations */
static const struct v4l2_file_operations fimc_capture_fops = {
.owner = THIS_MODULE,
.open = fimc_capture_open,
.release = fimc_capture_close,
.poll = fimc_capture_poll,
.unlocked_ioctl = video_ioctl2,
.mmap = fimc_capture_mmap,
};
static int fimc_vidioc_querycap_capture(struct file *file, void *priv,
struct v4l2_capability *cap)
{
struct fimc_ctx *ctx = file->private_data;
struct fimc_dev *fimc = ctx->fimc_dev;
strncpy(cap->driver, fimc->pdev->name, sizeof(cap->driver) - 1);
strncpy(cap->card, fimc->pdev->name, sizeof(cap->card) - 1);
cap->bus_info[0] = 0;
cap->version = KERNEL_VERSION(1, 0, 0);
cap->capabilities = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_CAPTURE |
V4L2_CAP_VIDEO_CAPTURE_MPLANE;
return 0;
}
/* Synchronize formats of the camera interface input and attached sensor. */
static int sync_capture_fmt(struct fimc_ctx *ctx)
{
struct fimc_frame *frame = &ctx->s_frame;
struct fimc_dev *fimc = ctx->fimc_dev;
struct v4l2_mbus_framefmt *fmt = &fimc->vid_cap.fmt;
int ret;
fmt->width = ctx->d_frame.o_width;
fmt->height = ctx->d_frame.o_height;
ret = v4l2_subdev_call(fimc->vid_cap.sd, video, s_mbus_fmt, fmt);
if (ret == -ENOIOCTLCMD) {
err("s_mbus_fmt failed");
return ret;
}
dbg("w: %d, h: %d, code= %d", fmt->width, fmt->height, fmt->code);
frame->fmt = find_mbus_format(fmt, FMT_FLAGS_CAM);
if (!frame->fmt) {
err("fimc source format not found\n");
return -EINVAL;
}
frame->f_width = fmt->width;
frame->f_height = fmt->height;
frame->width = fmt->width;
frame->height = fmt->height;
frame->o_width = fmt->width;
frame->o_height = fmt->height;
frame->offs_h = 0;
frame->offs_v = 0;
return 0;
}
static int fimc_cap_s_fmt_mplane(struct file *file, void *priv,
struct v4l2_format *f)
{
struct fimc_ctx *ctx = priv;
struct fimc_dev *fimc = ctx->fimc_dev;
struct fimc_frame *frame;
struct v4l2_pix_format_mplane *pix;
int ret;
int i;
if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
return -EINVAL;
ret = fimc_vidioc_try_fmt_mplane(file, priv, f);
if (ret)
return ret;
if (vb2_is_busy(&fimc->vid_cap.vbq) || fimc_capture_active(fimc))
return -EBUSY;
frame = &ctx->d_frame;
pix = &f->fmt.pix_mp;
frame->fmt = find_format(f, FMT_FLAGS_M2M | FMT_FLAGS_CAM);
if (!frame->fmt) {
err("fimc target format not found\n");
return -EINVAL;
}
for (i = 0; i < frame->fmt->colplanes; i++) {
frame->payload[i] =
(pix->width * pix->height * frame->fmt->depth[i]) >> 3;
}
/* Output DMA frame pixel size and offsets. */
frame->f_width = pix->plane_fmt[0].bytesperline * 8
/ frame->fmt->depth[0];
frame->f_height = pix->height;
frame->width = pix->width;
frame->height = pix->height;
frame->o_width = pix->width;
frame->o_height = pix->height;
frame->offs_h = 0;
frame->offs_v = 0;
ctx->state |= (FIMC_PARAMS | FIMC_DST_FMT);
ret = sync_capture_fmt(ctx);
return ret;
}
static int fimc_cap_enum_input(struct file *file, void *priv,
struct v4l2_input *i)
{
struct fimc_ctx *ctx = priv;
struct s5p_platform_fimc *pldata = ctx->fimc_dev->pdata;
struct s5p_fimc_isp_info *isp_info;
if (i->index >= pldata->num_clients)
return -EINVAL;
isp_info = &pldata->isp_info[i->index];
i->type = V4L2_INPUT_TYPE_CAMERA;
strncpy(i->name, isp_info->board_info->type, 32);
return 0;
}
static int fimc_cap_s_input(struct file *file, void *priv,
unsigned int i)
{
struct fimc_ctx *ctx = priv;
struct fimc_dev *fimc = ctx->fimc_dev;
struct s5p_platform_fimc *pdata = fimc->pdata;
if (fimc_capture_active(ctx->fimc_dev))
return -EBUSY;
if (i >= pdata->num_clients)
return -EINVAL;
if (fimc->vid_cap.sd) {
int ret = v4l2_subdev_call(fimc->vid_cap.sd, core, s_power, 0);
if (ret)
err("s_power failed: %d", ret);
clk_disable(fimc->clock[CLK_CAM]);
}
/* Release the attached sensor subdevice. */
fimc_subdev_unregister(fimc);
return fimc_isp_subdev_init(fimc, i);
}
static int fimc_cap_g_input(struct file *file, void *priv,
unsigned int *i)
{
struct fimc_ctx *ctx = priv;
struct fimc_vid_cap *cap = &ctx->fimc_dev->vid_cap;
*i = cap->input_index;
return 0;
}
static int fimc_cap_streamon(struct file *file, void *priv,
enum v4l2_buf_type type)
{
struct fimc_ctx *ctx = priv;
struct fimc_dev *fimc = ctx->fimc_dev;
if (fimc_capture_active(fimc) || !fimc->vid_cap.sd)
return -EBUSY;
if (!(ctx->state & FIMC_DST_FMT)) {
v4l2_err(&fimc->vid_cap.v4l2_dev, "Format is not set\n");
return -EINVAL;
}
return vb2_streamon(&fimc->vid_cap.vbq, type);
}
static int fimc_cap_streamoff(struct file *file, void *priv,
enum v4l2_buf_type type)
{
struct fimc_ctx *ctx = priv;
struct fimc_dev *fimc = ctx->fimc_dev;
return vb2_streamoff(&fimc->vid_cap.vbq, type);
}
static int fimc_cap_reqbufs(struct file *file, void *priv,
struct v4l2_requestbuffers *reqbufs)
{
struct fimc_ctx *ctx = priv;
struct fimc_vid_cap *cap = &ctx->fimc_dev->vid_cap;
int ret;
ret = vb2_reqbufs(&cap->vbq, reqbufs);
if (!ret)
cap->reqbufs_count = reqbufs->count;
return ret;
}
static int fimc_cap_querybuf(struct file *file, void *priv,
struct v4l2_buffer *buf)
{
struct fimc_ctx *ctx = priv;
struct fimc_vid_cap *cap = &ctx->fimc_dev->vid_cap;
return vb2_querybuf(&cap->vbq, buf);
}
static int fimc_cap_qbuf(struct file *file, void *priv,
struct v4l2_buffer *buf)
{
struct fimc_ctx *ctx = priv;
struct fimc_vid_cap *cap = &ctx->fimc_dev->vid_cap;
return vb2_qbuf(&cap->vbq, buf);
}
static int fimc_cap_dqbuf(struct file *file, void *priv,
struct v4l2_buffer *buf)
{
struct fimc_ctx *ctx = priv;
return vb2_dqbuf(&ctx->fimc_dev->vid_cap.vbq, buf,
file->f_flags & O_NONBLOCK);
}
static int fimc_cap_s_ctrl(struct file *file, void *priv,
struct v4l2_control *ctrl)
{
struct fimc_ctx *ctx = priv;
int ret = -EINVAL;
/* Allow any controls but 90/270 rotation while streaming */
if (!fimc_capture_active(ctx->fimc_dev) ||
ctrl->id != V4L2_CID_ROTATE ||
(ctrl->value != 90 && ctrl->value != 270)) {
ret = check_ctrl_val(ctx, ctrl);
if (!ret) {
ret = fimc_s_ctrl(ctx, ctrl);
if (!ret)
ctx->state |= FIMC_PARAMS;
}
}
if (ret == -EINVAL)
ret = v4l2_subdev_call(ctx->fimc_dev->vid_cap.sd,
core, s_ctrl, ctrl);
return ret;
}
static int fimc_cap_cropcap(struct file *file, void *fh,
struct v4l2_cropcap *cr)
{
struct fimc_frame *f;
struct fimc_ctx *ctx = fh;
if (cr->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
return -EINVAL;
f = &ctx->s_frame;
cr->bounds.left = 0;
cr->bounds.top = 0;
cr->bounds.width = f->o_width;
cr->bounds.height = f->o_height;
cr->defrect = cr->bounds;
return 0;
}
static int fimc_cap_g_crop(struct file *file, void *fh, struct v4l2_crop *cr)
{
struct fimc_frame *f;
struct fimc_ctx *ctx = file->private_data;
f = &ctx->s_frame;
cr->c.left = f->offs_h;
cr->c.top = f->offs_v;
cr->c.width = f->width;
cr->c.height = f->height;
return 0;
}
static int fimc_cap_s_crop(struct file *file, void *fh,
struct v4l2_crop *cr)
{
struct fimc_frame *f;
struct fimc_ctx *ctx = file->private_data;
struct fimc_dev *fimc = ctx->fimc_dev;
int ret = -EINVAL;
if (fimc_capture_active(fimc))
return -EBUSY;
ret = fimc_try_crop(ctx, cr);
if (ret)
return ret;
if (!(ctx->state & FIMC_DST_FMT)) {
v4l2_err(&fimc->vid_cap.v4l2_dev,
"Capture color format not set\n");
return -EINVAL; /* TODO: make sure this is the right value */
}
f = &ctx->s_frame;
/* Check for the pixel scaling ratio when cropping input image. */
ret = fimc_check_scaler_ratio(cr->c.width, cr->c.height,
ctx->d_frame.width, ctx->d_frame.height,
ctx->rotation);
if (ret) {
v4l2_err(&fimc->vid_cap.v4l2_dev, "Out of the scaler range\n");
return ret;
}
f->offs_h = cr->c.left;
f->offs_v = cr->c.top;
f->width = cr->c.width;
f->height = cr->c.height;
return 0;
}
static const struct v4l2_ioctl_ops fimc_capture_ioctl_ops = {
.vidioc_querycap = fimc_vidioc_querycap_capture,
.vidioc_enum_fmt_vid_cap_mplane = fimc_vidioc_enum_fmt_mplane,
.vidioc_try_fmt_vid_cap_mplane = fimc_vidioc_try_fmt_mplane,
.vidioc_s_fmt_vid_cap_mplane = fimc_cap_s_fmt_mplane,
.vidioc_g_fmt_vid_cap_mplane = fimc_vidioc_g_fmt_mplane,
.vidioc_reqbufs = fimc_cap_reqbufs,
.vidioc_querybuf = fimc_cap_querybuf,
.vidioc_qbuf = fimc_cap_qbuf,
.vidioc_dqbuf = fimc_cap_dqbuf,
.vidioc_streamon = fimc_cap_streamon,
.vidioc_streamoff = fimc_cap_streamoff,
.vidioc_queryctrl = fimc_vidioc_queryctrl,
.vidioc_g_ctrl = fimc_vidioc_g_ctrl,
.vidioc_s_ctrl = fimc_cap_s_ctrl,
.vidioc_g_crop = fimc_cap_g_crop,
.vidioc_s_crop = fimc_cap_s_crop,
.vidioc_cropcap = fimc_cap_cropcap,
.vidioc_enum_input = fimc_cap_enum_input,
.vidioc_s_input = fimc_cap_s_input,
.vidioc_g_input = fimc_cap_g_input,
};
/* fimc->lock must be already initialized */
int fimc_register_capture_device(struct fimc_dev *fimc)
{
struct v4l2_device *v4l2_dev = &fimc->vid_cap.v4l2_dev;
struct video_device *vfd;
struct fimc_vid_cap *vid_cap;
struct fimc_ctx *ctx;
struct v4l2_format f;
struct fimc_frame *fr;
struct vb2_queue *q;
int ret;
ctx = kzalloc(sizeof *ctx, GFP_KERNEL);
if (!ctx)
return -ENOMEM;
ctx->fimc_dev = fimc;
ctx->in_path = FIMC_CAMERA;
ctx->out_path = FIMC_DMA;
ctx->state = FIMC_CTX_CAP;
/* Default format of the output frames */
f.fmt.pix.pixelformat = V4L2_PIX_FMT_RGB32;
fr = &ctx->d_frame;
fr->fmt = find_format(&f, FMT_FLAGS_M2M);
fr->width = fr->f_width = fr->o_width = 640;
fr->height = fr->f_height = fr->o_height = 480;
if (!v4l2_dev->name[0])
snprintf(v4l2_dev->name, sizeof(v4l2_dev->name),
"%s.capture", dev_name(&fimc->pdev->dev));
ret = v4l2_device_register(NULL, v4l2_dev);
if (ret)
goto err_info;
vfd = video_device_alloc();
if (!vfd) {
v4l2_err(v4l2_dev, "Failed to allocate video device\n");
goto err_v4l2_reg;
}
snprintf(vfd->name, sizeof(vfd->name), "%s:cap",
dev_name(&fimc->pdev->dev));
vfd->fops = &fimc_capture_fops;
vfd->ioctl_ops = &fimc_capture_ioctl_ops;
vfd->minor = -1;
vfd->release = video_device_release;
vfd->lock = &fimc->lock;
video_set_drvdata(vfd, fimc);
vid_cap = &fimc->vid_cap;
vid_cap->vfd = vfd;
vid_cap->active_buf_cnt = 0;
vid_cap->reqbufs_count = 0;
vid_cap->refcnt = 0;
/* Default color format for image sensor */
vid_cap->fmt.code = V4L2_MBUS_FMT_YUYV8_2X8;
INIT_LIST_HEAD(&vid_cap->pending_buf_q);
INIT_LIST_HEAD(&vid_cap->active_buf_q);
spin_lock_init(&ctx->slock);
vid_cap->ctx = ctx;
q = &fimc->vid_cap.vbq;
memset(q, 0, sizeof(*q));
q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
q->io_modes = VB2_MMAP | VB2_USERPTR;
q->drv_priv = fimc->vid_cap.ctx;
q->ops = &fimc_capture_qops;
q->mem_ops = &vb2_dma_contig_memops;
q->buf_struct_size = sizeof(struct fimc_vid_buffer);
vb2_queue_init(q);
ret = video_register_device(vfd, VFL_TYPE_GRABBER, -1);
if (ret) {
v4l2_err(v4l2_dev, "Failed to register video device\n");
goto err_vd_reg;
}
v4l2_info(v4l2_dev,
"FIMC capture driver registered as /dev/video%d\n",
vfd->num);
return 0;
err_vd_reg:
video_device_release(vfd);
err_v4l2_reg:
v4l2_device_unregister(v4l2_dev);
err_info:
dev_err(&fimc->pdev->dev, "failed to install\n");
return ret;
}
void fimc_unregister_capture_device(struct fimc_dev *fimc)
{
struct fimc_vid_cap *capture = &fimc->vid_cap;
if (capture->vfd)
video_unregister_device(capture->vfd);
kfree(capture->ctx);
}