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bcm2835-camera.c
2012 lines (1708 loc) · 55.2 KB
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bcm2835-camera.c
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// SPDX-License-Identifier: GPL-2.0
/*
* Broadcom BCM2835 V4L2 driver
*
* Copyright © 2013 Raspberry Pi (Trading) Ltd.
*
* Authors: Vincent Sanders @ Collabora
* Dave Stevenson @ Broadcom
* (now dave.stevenson@raspberrypi.org)
* Simon Mellor @ Broadcom
* Luke Diamand @ Broadcom
*/
#include <linux/dma-mapping.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <media/videobuf2-vmalloc.h>
#include <media/videobuf2-dma-contig.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-fh.h>
#include <media/v4l2-event.h>
#include <media/v4l2-common.h>
#include <linux/delay.h>
#include "../interface/vchiq_arm/vchiq_bus.h"
#include "../vchiq-mmal/mmal-common.h"
#include "../vchiq-mmal/mmal-encodings.h"
#include "../vchiq-mmal/mmal-vchiq.h"
#include "../vchiq-mmal/mmal-msg.h"
#include "../vchiq-mmal/mmal-parameters.h"
#include "bcm2835-camera.h"
#define MIN_WIDTH 32
#define MIN_HEIGHT 32
#define MIN_BUFFER_SIZE (80 * 1024)
#define MAX_VIDEO_MODE_WIDTH 1280
#define MAX_VIDEO_MODE_HEIGHT 720
#define MAX_BCM2835_CAMERAS 2
int bcm2835_v4l2_debug;
module_param_named(debug, bcm2835_v4l2_debug, int, 0644);
MODULE_PARM_DESC(bcm2835_v4l2_debug, "Debug level 0-2");
#define UNSET (-1)
static int video_nr[] = {[0 ... (MAX_BCM2835_CAMERAS - 1)] = UNSET };
module_param_array(video_nr, int, NULL, 0644);
MODULE_PARM_DESC(video_nr, "videoX start numbers, -1 is autodetect");
static int max_video_width = MAX_VIDEO_MODE_WIDTH;
static int max_video_height = MAX_VIDEO_MODE_HEIGHT;
module_param(max_video_width, int, 0644);
MODULE_PARM_DESC(max_video_width, "Threshold for video mode");
module_param(max_video_height, int, 0644);
MODULE_PARM_DESC(max_video_height, "Threshold for video mode");
/* camera instance counter */
static atomic_t camera_instance = ATOMIC_INIT(0);
/* global device data array */
static struct bcm2835_mmal_dev *gdev[MAX_BCM2835_CAMERAS];
#define FPS_MIN 1
#define FPS_MAX 90
/* timeperframe: min/max and default */
static const struct v4l2_fract
tpf_min = {.numerator = 1, .denominator = FPS_MAX},
tpf_max = {.numerator = 1, .denominator = FPS_MIN},
tpf_default = {.numerator = 1000, .denominator = 30000};
/* Container for MMAL and VB2 buffers*/
struct vb2_mmal_buffer {
struct vb2_v4l2_buffer vb;
struct mmal_buffer mmal;
};
/* video formats */
static struct mmal_fmt formats[] = {
{
.fourcc = V4L2_PIX_FMT_YUV420,
.mmal = MMAL_ENCODING_I420,
.depth = 12,
.mmal_component = COMP_CAMERA,
.ybbp = 1,
.remove_padding = true,
}, {
.fourcc = V4L2_PIX_FMT_YUYV,
.mmal = MMAL_ENCODING_YUYV,
.depth = 16,
.mmal_component = COMP_CAMERA,
.ybbp = 2,
.remove_padding = false,
}, {
.fourcc = V4L2_PIX_FMT_RGB24,
.mmal = MMAL_ENCODING_RGB24,
.depth = 24,
.mmal_component = COMP_CAMERA,
.ybbp = 3,
.remove_padding = false,
}, {
.fourcc = V4L2_PIX_FMT_JPEG,
.flags = V4L2_FMT_FLAG_COMPRESSED,
.mmal = MMAL_ENCODING_JPEG,
.depth = 8,
.mmal_component = COMP_IMAGE_ENCODE,
.ybbp = 0,
.remove_padding = false,
}, {
.fourcc = V4L2_PIX_FMT_H264,
.flags = V4L2_FMT_FLAG_COMPRESSED,
.mmal = MMAL_ENCODING_H264,
.depth = 8,
.mmal_component = COMP_VIDEO_ENCODE,
.ybbp = 0,
.remove_padding = false,
}, {
.fourcc = V4L2_PIX_FMT_MJPEG,
.flags = V4L2_FMT_FLAG_COMPRESSED,
.mmal = MMAL_ENCODING_MJPEG,
.depth = 8,
.mmal_component = COMP_VIDEO_ENCODE,
.ybbp = 0,
.remove_padding = false,
}, {
.fourcc = V4L2_PIX_FMT_YVYU,
.mmal = MMAL_ENCODING_YVYU,
.depth = 16,
.mmal_component = COMP_CAMERA,
.ybbp = 2,
.remove_padding = false,
}, {
.fourcc = V4L2_PIX_FMT_VYUY,
.mmal = MMAL_ENCODING_VYUY,
.depth = 16,
.mmal_component = COMP_CAMERA,
.ybbp = 2,
.remove_padding = false,
}, {
.fourcc = V4L2_PIX_FMT_UYVY,
.mmal = MMAL_ENCODING_UYVY,
.depth = 16,
.mmal_component = COMP_CAMERA,
.ybbp = 2,
.remove_padding = false,
}, {
.fourcc = V4L2_PIX_FMT_NV12,
.mmal = MMAL_ENCODING_NV12,
.depth = 12,
.mmal_component = COMP_CAMERA,
.ybbp = 1,
.remove_padding = true,
}, {
.fourcc = V4L2_PIX_FMT_BGR24,
.mmal = MMAL_ENCODING_BGR24,
.depth = 24,
.mmal_component = COMP_CAMERA,
.ybbp = 3,
.remove_padding = false,
}, {
.fourcc = V4L2_PIX_FMT_YVU420,
.mmal = MMAL_ENCODING_YV12,
.depth = 12,
.mmal_component = COMP_CAMERA,
.ybbp = 1,
.remove_padding = true,
}, {
.fourcc = V4L2_PIX_FMT_NV21,
.mmal = MMAL_ENCODING_NV21,
.depth = 12,
.mmal_component = COMP_CAMERA,
.ybbp = 1,
.remove_padding = true,
}, {
.fourcc = V4L2_PIX_FMT_BGR32,
.mmal = MMAL_ENCODING_BGRA,
.depth = 32,
.mmal_component = COMP_CAMERA,
.ybbp = 4,
.remove_padding = false,
},
};
static struct mmal_fmt *get_format(struct v4l2_format *f)
{
struct mmal_fmt *fmt;
unsigned int k;
for (k = 0; k < ARRAY_SIZE(formats); k++) {
fmt = &formats[k];
if (fmt->fourcc == f->fmt.pix.pixelformat)
return fmt;
}
return NULL;
}
/* ------------------------------------------------------------------
* Videobuf queue operations
* ------------------------------------------------------------------
*/
static int queue_setup(struct vb2_queue *vq,
unsigned int *nbuffers, unsigned int *nplanes,
unsigned int sizes[], struct device *alloc_ctxs[])
{
struct bcm2835_mmal_dev *dev = vb2_get_drv_priv(vq);
unsigned long size;
/* refuse queue setup if port is not configured */
if (!dev->capture.port) {
v4l2_err(&dev->v4l2_dev,
"%s: capture port not configured\n", __func__);
return -EINVAL;
}
/* Handle CREATE_BUFS situation - *nplanes != 0 */
if (*nplanes) {
if (*nplanes != 1 ||
sizes[0] < dev->capture.port->current_buffer.size) {
v4l2_dbg(1, bcm2835_v4l2_debug, &dev->v4l2_dev,
"%s: dev:%p Invalid buffer request from CREATE_BUFS, size %u < %u, nplanes %u != 1\n",
__func__, dev, sizes[0],
dev->capture.port->current_buffer.size,
*nplanes);
return -EINVAL;
} else {
return 0;
}
}
/* Handle REQBUFS situation */
size = dev->capture.port->current_buffer.size;
if (size == 0) {
v4l2_err(&dev->v4l2_dev,
"%s: capture port buffer size is zero\n", __func__);
return -EINVAL;
}
if (*nbuffers < dev->capture.port->minimum_buffer.num)
*nbuffers = dev->capture.port->minimum_buffer.num;
dev->capture.port->current_buffer.num = *nbuffers;
*nplanes = 1;
sizes[0] = size;
/*
* videobuf2-vmalloc allocator is context-less so no need to set
* alloc_ctxs array.
*/
v4l2_dbg(1, bcm2835_v4l2_debug, &dev->v4l2_dev, "%s: dev:%p\n",
__func__, dev);
return 0;
}
static int buffer_init(struct vb2_buffer *vb)
{
struct bcm2835_mmal_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
struct vb2_v4l2_buffer *vb2 = to_vb2_v4l2_buffer(vb);
struct vb2_mmal_buffer *buf =
container_of(vb2, struct vb2_mmal_buffer, vb);
v4l2_dbg(1, bcm2835_v4l2_debug, &dev->v4l2_dev, "%s: dev:%p, vb %p\n",
__func__, dev, vb);
buf->mmal.buffer = vb2_plane_vaddr(&buf->vb.vb2_buf, 0);
buf->mmal.buffer_size = vb2_plane_size(&buf->vb.vb2_buf, 0);
return mmal_vchi_buffer_init(dev->instance, &buf->mmal);
}
static int buffer_prepare(struct vb2_buffer *vb)
{
struct bcm2835_mmal_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
unsigned long size;
v4l2_dbg(1, bcm2835_v4l2_debug, &dev->v4l2_dev, "%s: dev:%p, vb %p\n",
__func__, dev, vb);
if (!dev->capture.port || !dev->capture.fmt)
return -ENODEV;
size = dev->capture.stride * dev->capture.height;
if (vb2_plane_size(vb, 0) < size) {
v4l2_err(&dev->v4l2_dev,
"%s data will not fit into plane (%lu < %lu)\n",
__func__, vb2_plane_size(vb, 0), size);
return -EINVAL;
}
return 0;
}
static void buffer_cleanup(struct vb2_buffer *vb)
{
struct bcm2835_mmal_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
struct vb2_v4l2_buffer *vb2 = to_vb2_v4l2_buffer(vb);
struct vb2_mmal_buffer *buf =
container_of(vb2, struct vb2_mmal_buffer, vb);
v4l2_dbg(1, bcm2835_v4l2_debug, &dev->v4l2_dev, "%s: dev:%p, vb %p\n",
__func__, dev, vb);
mmal_vchi_buffer_cleanup(&buf->mmal);
}
static inline bool is_capturing(struct bcm2835_mmal_dev *dev)
{
return dev->capture.camera_port ==
&dev->component[COMP_CAMERA]->output[CAM_PORT_CAPTURE];
}
static void buffer_cb(struct vchiq_mmal_instance *instance,
struct vchiq_mmal_port *port,
int status,
struct mmal_buffer *mmal_buf)
{
struct bcm2835_mmal_dev *dev = port->cb_ctx;
struct vb2_mmal_buffer *buf =
container_of(mmal_buf, struct vb2_mmal_buffer, mmal);
v4l2_dbg(1, bcm2835_v4l2_debug, &dev->v4l2_dev,
"%s: status:%d, buf:%p, length:%lu, flags %u, pts %lld\n",
__func__, status, buf, mmal_buf->length, mmal_buf->mmal_flags,
mmal_buf->pts);
if (status) {
/* error in transfer */
if (buf) {
/* there was a buffer with the error so return it */
vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
}
return;
}
if (mmal_buf->length == 0) {
/* stream ended */
if (dev->capture.frame_count) {
/* empty buffer whilst capturing - expected to be an
* EOS, so grab another frame
*/
if (is_capturing(dev)) {
v4l2_dbg(1, bcm2835_v4l2_debug, &dev->v4l2_dev,
"Grab another frame");
vchiq_mmal_port_parameter_set(instance,
dev->capture.camera_port,
MMAL_PARAMETER_CAPTURE,
&dev->capture.frame_count,
sizeof(dev->capture.frame_count));
}
if (vchiq_mmal_submit_buffer(instance, port,
&buf->mmal))
v4l2_dbg(1, bcm2835_v4l2_debug, &dev->v4l2_dev,
"Failed to return EOS buffer");
} else {
/* stopping streaming.
* return buffer, and signal frame completion
*/
vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
complete(&dev->capture.frame_cmplt);
}
return;
}
if (!dev->capture.frame_count) {
/* signal frame completion */
vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
complete(&dev->capture.frame_cmplt);
return;
}
if (dev->capture.vc_start_timestamp != -1 && mmal_buf->pts) {
ktime_t timestamp;
s64 runtime_us = mmal_buf->pts -
dev->capture.vc_start_timestamp;
timestamp = ktime_add_us(dev->capture.kernel_start_ts,
runtime_us);
v4l2_dbg(1, bcm2835_v4l2_debug, &dev->v4l2_dev,
"Convert start time %llu and %llu with offset %llu to %llu\n",
ktime_to_ns(dev->capture.kernel_start_ts),
dev->capture.vc_start_timestamp, mmal_buf->pts,
ktime_to_ns(timestamp));
buf->vb.vb2_buf.timestamp = ktime_to_ns(timestamp);
} else {
buf->vb.vb2_buf.timestamp = ktime_get_ns();
}
buf->vb.sequence = dev->capture.sequence++;
buf->vb.field = V4L2_FIELD_NONE;
vb2_set_plane_payload(&buf->vb.vb2_buf, 0, mmal_buf->length);
if (mmal_buf->mmal_flags & MMAL_BUFFER_HEADER_FLAG_KEYFRAME)
buf->vb.flags |= V4L2_BUF_FLAG_KEYFRAME;
vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_DONE);
if (mmal_buf->mmal_flags & MMAL_BUFFER_HEADER_FLAG_EOS &&
is_capturing(dev)) {
v4l2_dbg(1, bcm2835_v4l2_debug, &dev->v4l2_dev,
"Grab another frame as buffer has EOS");
vchiq_mmal_port_parameter_set(instance,
dev->capture.camera_port,
MMAL_PARAMETER_CAPTURE,
&dev->capture.frame_count,
sizeof(dev->capture.frame_count));
}
}
static int enable_camera(struct bcm2835_mmal_dev *dev)
{
int ret;
if (!dev->camera_use_count) {
ret = vchiq_mmal_port_parameter_set(dev->instance,
&dev->component[COMP_CAMERA]->control,
MMAL_PARAMETER_CAMERA_NUM, &dev->camera_num,
sizeof(dev->camera_num));
if (ret < 0) {
v4l2_err(&dev->v4l2_dev,
"Failed setting camera num, ret %d\n", ret);
return -EINVAL;
}
ret = vchiq_mmal_component_enable(dev->instance,
dev->component[COMP_CAMERA]);
if (ret < 0) {
v4l2_err(&dev->v4l2_dev,
"Failed enabling camera, ret %d\n", ret);
return -EINVAL;
}
}
dev->camera_use_count++;
v4l2_dbg(1, bcm2835_v4l2_debug,
&dev->v4l2_dev, "enabled camera (refcount %d)\n",
dev->camera_use_count);
return 0;
}
static int disable_camera(struct bcm2835_mmal_dev *dev)
{
int ret;
if (!dev->camera_use_count) {
v4l2_err(&dev->v4l2_dev,
"Disabled the camera when already disabled\n");
return -EINVAL;
}
dev->camera_use_count--;
if (!dev->camera_use_count) {
unsigned int i = 0xFFFFFFFF;
v4l2_dbg(1, bcm2835_v4l2_debug, &dev->v4l2_dev,
"Disabling camera\n");
ret = vchiq_mmal_component_disable(dev->instance,
dev->component[COMP_CAMERA]);
if (ret < 0) {
v4l2_err(&dev->v4l2_dev,
"Failed disabling camera, ret %d\n", ret);
return -EINVAL;
}
vchiq_mmal_port_parameter_set(dev->instance,
&dev->component[COMP_CAMERA]->control,
MMAL_PARAMETER_CAMERA_NUM,
&i,
sizeof(i));
}
v4l2_dbg(1, bcm2835_v4l2_debug, &dev->v4l2_dev,
"Camera refcount now %d\n", dev->camera_use_count);
return 0;
}
static void buffer_queue(struct vb2_buffer *vb)
{
struct bcm2835_mmal_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
struct vb2_v4l2_buffer *vb2 = to_vb2_v4l2_buffer(vb);
struct vb2_mmal_buffer *buf =
container_of(vb2, struct vb2_mmal_buffer, vb);
int ret;
v4l2_dbg(1, bcm2835_v4l2_debug, &dev->v4l2_dev,
"%s: dev:%p buf:%p, idx %u\n",
__func__, dev, buf, vb2->vb2_buf.index);
ret = vchiq_mmal_submit_buffer(dev->instance, dev->capture.port,
&buf->mmal);
if (ret < 0)
v4l2_err(&dev->v4l2_dev, "%s: error submitting buffer\n",
__func__);
}
static int start_streaming(struct vb2_queue *vq, unsigned int count)
{
struct bcm2835_mmal_dev *dev = vb2_get_drv_priv(vq);
int ret;
u32 parameter_size;
v4l2_dbg(1, bcm2835_v4l2_debug, &dev->v4l2_dev, "%s: dev:%p\n",
__func__, dev);
/* ensure a format has actually been set */
if (!dev->capture.port)
return -EINVAL;
if (enable_camera(dev) < 0) {
v4l2_err(&dev->v4l2_dev, "Failed to enable camera\n");
return -EINVAL;
}
/*init_completion(&dev->capture.frame_cmplt); */
/* enable frame capture */
dev->capture.frame_count = 1;
/* reset sequence number */
dev->capture.sequence = 0;
/* if the preview is not already running, wait for a few frames for AGC
* to settle down.
*/
if (!dev->component[COMP_PREVIEW]->enabled)
msleep(300);
/* enable the connection from camera to encoder (if applicable) */
if (dev->capture.camera_port != dev->capture.port &&
dev->capture.camera_port) {
ret = vchiq_mmal_port_enable(dev->instance,
dev->capture.camera_port, NULL);
if (ret) {
v4l2_err(&dev->v4l2_dev,
"Failed to enable encode tunnel - error %d\n",
ret);
return -1;
}
}
/* Get VC timestamp at this point in time */
parameter_size = sizeof(dev->capture.vc_start_timestamp);
if (vchiq_mmal_port_parameter_get(dev->instance,
dev->capture.camera_port,
MMAL_PARAMETER_SYSTEM_TIME,
&dev->capture.vc_start_timestamp,
¶meter_size)) {
v4l2_err(&dev->v4l2_dev,
"Failed to get VC start time - update your VC f/w\n");
/* Flag to indicate just to rely on kernel timestamps */
dev->capture.vc_start_timestamp = -1;
} else {
v4l2_dbg(1, bcm2835_v4l2_debug, &dev->v4l2_dev,
"Start time %lld size %d\n",
dev->capture.vc_start_timestamp, parameter_size);
}
dev->capture.kernel_start_ts = ktime_get();
/* enable the camera port */
dev->capture.port->cb_ctx = dev;
ret = vchiq_mmal_port_enable(dev->instance, dev->capture.port,
buffer_cb);
if (ret) {
v4l2_err(&dev->v4l2_dev,
"Failed to enable capture port - error %d. Disabling camera port again\n",
ret);
vchiq_mmal_port_disable(dev->instance,
dev->capture.camera_port);
if (disable_camera(dev) < 0) {
v4l2_err(&dev->v4l2_dev, "Failed to disable camera\n");
return -EINVAL;
}
return -1;
}
/* capture the first frame */
vchiq_mmal_port_parameter_set(dev->instance,
dev->capture.camera_port,
MMAL_PARAMETER_CAPTURE,
&dev->capture.frame_count,
sizeof(dev->capture.frame_count));
return 0;
}
/* abort streaming and wait for last buffer */
static void stop_streaming(struct vb2_queue *vq)
{
int ret;
unsigned long timeout;
struct bcm2835_mmal_dev *dev = vb2_get_drv_priv(vq);
struct vchiq_mmal_port *port = dev->capture.port;
v4l2_dbg(1, bcm2835_v4l2_debug, &dev->v4l2_dev, "%s: dev:%p\n",
__func__, dev);
init_completion(&dev->capture.frame_cmplt);
dev->capture.frame_count = 0;
/* ensure a format has actually been set */
if (!port) {
v4l2_err(&dev->v4l2_dev,
"no capture port - stream not started?\n");
return;
}
v4l2_dbg(1, bcm2835_v4l2_debug, &dev->v4l2_dev, "stopping capturing\n");
/* stop capturing frames */
vchiq_mmal_port_parameter_set(dev->instance,
dev->capture.camera_port,
MMAL_PARAMETER_CAPTURE,
&dev->capture.frame_count,
sizeof(dev->capture.frame_count));
v4l2_dbg(1, bcm2835_v4l2_debug, &dev->v4l2_dev,
"disabling connection\n");
/* disable the connection from camera to encoder */
ret = vchiq_mmal_port_disable(dev->instance, dev->capture.camera_port);
if (!ret && dev->capture.camera_port != port) {
v4l2_dbg(1, bcm2835_v4l2_debug, &dev->v4l2_dev,
"disabling port\n");
ret = vchiq_mmal_port_disable(dev->instance, port);
} else if (dev->capture.camera_port != port) {
v4l2_err(&dev->v4l2_dev, "port_disable failed, error %d\n",
ret);
}
/* wait for all buffers to be returned */
while (atomic_read(&port->buffers_with_vpu)) {
v4l2_dbg(1, bcm2835_v4l2_debug, &dev->v4l2_dev,
"%s: Waiting for buffers to be returned - %d outstanding\n",
__func__, atomic_read(&port->buffers_with_vpu));
timeout = wait_for_completion_timeout(&dev->capture.frame_cmplt,
HZ);
if (timeout == 0) {
v4l2_err(&dev->v4l2_dev, "%s: Timeout waiting for buffers to be returned - %d outstanding\n",
__func__,
atomic_read(&port->buffers_with_vpu));
break;
}
}
if (disable_camera(dev) < 0)
v4l2_err(&dev->v4l2_dev, "Failed to disable camera\n");
}
static const struct vb2_ops bcm2835_mmal_video_qops = {
.queue_setup = queue_setup,
.buf_init = buffer_init,
.buf_prepare = buffer_prepare,
.buf_cleanup = buffer_cleanup,
.buf_queue = buffer_queue,
.start_streaming = start_streaming,
.stop_streaming = stop_streaming,
.wait_prepare = vb2_ops_wait_prepare,
.wait_finish = vb2_ops_wait_finish,
};
/* ------------------------------------------------------------------
* IOCTL operations
* ------------------------------------------------------------------
*/
static int set_overlay_params(struct bcm2835_mmal_dev *dev,
struct vchiq_mmal_port *port)
{
struct mmal_parameter_displayregion prev_config = {
.set = MMAL_DISPLAY_SET_LAYER |
MMAL_DISPLAY_SET_ALPHA |
MMAL_DISPLAY_SET_DEST_RECT |
MMAL_DISPLAY_SET_FULLSCREEN,
.layer = 2,
.alpha = dev->overlay.global_alpha,
.fullscreen = 0,
.dest_rect = {
.x = dev->overlay.w.left,
.y = dev->overlay.w.top,
.width = dev->overlay.w.width,
.height = dev->overlay.w.height,
},
};
return vchiq_mmal_port_parameter_set(dev->instance, port,
MMAL_PARAMETER_DISPLAYREGION,
&prev_config, sizeof(prev_config));
}
/* overlay ioctl */
static int vidioc_enum_fmt_vid_overlay(struct file *file, void *priv,
struct v4l2_fmtdesc *f)
{
struct mmal_fmt *fmt;
if (f->index >= ARRAY_SIZE(formats))
return -EINVAL;
fmt = &formats[f->index];
f->pixelformat = fmt->fourcc;
return 0;
}
static int vidioc_g_fmt_vid_overlay(struct file *file, void *priv,
struct v4l2_format *f)
{
struct bcm2835_mmal_dev *dev = video_drvdata(file);
f->fmt.win = dev->overlay;
return 0;
}
static int vidioc_try_fmt_vid_overlay(struct file *file, void *priv,
struct v4l2_format *f)
{
struct bcm2835_mmal_dev *dev = video_drvdata(file);
f->fmt.win.field = V4L2_FIELD_NONE;
f->fmt.win.chromakey = 0;
f->fmt.win.clips = NULL;
f->fmt.win.clipcount = 0;
f->fmt.win.bitmap = NULL;
v4l_bound_align_image(&f->fmt.win.w.width, MIN_WIDTH, dev->max_width, 1,
&f->fmt.win.w.height, MIN_HEIGHT, dev->max_height,
1, 0);
v4l_bound_align_image(&f->fmt.win.w.left, MIN_WIDTH, dev->max_width, 1,
&f->fmt.win.w.top, MIN_HEIGHT, dev->max_height,
1, 0);
v4l2_dbg(1, bcm2835_v4l2_debug, &dev->v4l2_dev,
"Overlay: Now w/h %dx%d l/t %dx%d\n",
f->fmt.win.w.width, f->fmt.win.w.height,
f->fmt.win.w.left, f->fmt.win.w.top);
v4l2_dump_win_format(1,
bcm2835_v4l2_debug,
&dev->v4l2_dev,
&f->fmt.win,
__func__);
return 0;
}
static int vidioc_s_fmt_vid_overlay(struct file *file, void *priv,
struct v4l2_format *f)
{
struct bcm2835_mmal_dev *dev = video_drvdata(file);
vidioc_try_fmt_vid_overlay(file, priv, f);
dev->overlay = f->fmt.win;
if (dev->component[COMP_PREVIEW]->enabled) {
set_overlay_params(dev,
&dev->component[COMP_PREVIEW]->input[0]);
}
return 0;
}
static int vidioc_overlay(struct file *file, void *f, unsigned int on)
{
int ret;
struct bcm2835_mmal_dev *dev = video_drvdata(file);
struct vchiq_mmal_port *src;
struct vchiq_mmal_port *dst;
if ((on && dev->component[COMP_PREVIEW]->enabled) ||
(!on && !dev->component[COMP_PREVIEW]->enabled))
return 0; /* already in requested state */
src = &dev->component[COMP_CAMERA]->output[CAM_PORT_PREVIEW];
if (!on) {
/* disconnect preview ports and disable component */
ret = vchiq_mmal_port_disable(dev->instance, src);
if (!ret)
ret = vchiq_mmal_port_connect_tunnel(dev->instance, src,
NULL);
if (ret >= 0)
ret = vchiq_mmal_component_disable(dev->instance,
dev->component[COMP_PREVIEW]);
disable_camera(dev);
return ret;
}
/* set preview port format and connect it to output */
dst = &dev->component[COMP_PREVIEW]->input[0];
ret = vchiq_mmal_port_set_format(dev->instance, src);
if (ret < 0)
return ret;
ret = set_overlay_params(dev, dst);
if (ret < 0)
return ret;
if (enable_camera(dev) < 0)
return -EINVAL;
ret = vchiq_mmal_component_enable(dev->instance,
dev->component[COMP_PREVIEW]);
if (ret < 0)
return ret;
v4l2_dbg(1, bcm2835_v4l2_debug, &dev->v4l2_dev, "connecting %p to %p\n",
src, dst);
ret = vchiq_mmal_port_connect_tunnel(dev->instance, src, dst);
if (ret)
return ret;
return vchiq_mmal_port_enable(dev->instance, src, NULL);
}
static int vidioc_g_fbuf(struct file *file, void *fh,
struct v4l2_framebuffer *a)
{
/* The video overlay must stay within the framebuffer and can't be
* positioned independently.
*/
struct bcm2835_mmal_dev *dev = video_drvdata(file);
struct vchiq_mmal_port *preview_port =
&dev->component[COMP_CAMERA]->output[CAM_PORT_PREVIEW];
a->capability = V4L2_FBUF_CAP_EXTERNOVERLAY |
V4L2_FBUF_CAP_GLOBAL_ALPHA;
a->flags = V4L2_FBUF_FLAG_OVERLAY;
a->fmt.width = preview_port->es.video.width;
a->fmt.height = preview_port->es.video.height;
a->fmt.pixelformat = V4L2_PIX_FMT_YUV420;
a->fmt.bytesperline = preview_port->es.video.width;
a->fmt.sizeimage = (preview_port->es.video.width *
preview_port->es.video.height * 3) >> 1;
a->fmt.colorspace = V4L2_COLORSPACE_SMPTE170M;
return 0;
}
/* input ioctls */
static int vidioc_enum_input(struct file *file, void *priv,
struct v4l2_input *inp)
{
/* only a single camera input */
if (inp->index)
return -EINVAL;
inp->type = V4L2_INPUT_TYPE_CAMERA;
snprintf((char *)inp->name, sizeof(inp->name), "Camera %u", inp->index);
return 0;
}
static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
{
*i = 0;
return 0;
}
static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
{
if (i)
return -EINVAL;
return 0;
}
/* capture ioctls */
static int vidioc_querycap(struct file *file, void *priv,
struct v4l2_capability *cap)
{
struct bcm2835_mmal_dev *dev = video_drvdata(file);
u32 major;
u32 minor;
vchiq_mmal_version(dev->instance, &major, &minor);
strscpy(cap->driver, "bcm2835 mmal", sizeof(cap->driver));
snprintf((char *)cap->card, sizeof(cap->card), "mmal service %d.%d", major, minor);
snprintf((char *)cap->bus_info, sizeof(cap->bus_info), "platform:%s", dev->v4l2_dev.name);
return 0;
}
static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_fmtdesc *f)
{
struct mmal_fmt *fmt;
if (f->index >= ARRAY_SIZE(formats))
return -EINVAL;
fmt = &formats[f->index];
f->pixelformat = fmt->fourcc;
return 0;
}
static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct bcm2835_mmal_dev *dev = video_drvdata(file);
f->fmt.pix.width = dev->capture.width;
f->fmt.pix.height = dev->capture.height;
f->fmt.pix.field = V4L2_FIELD_NONE;
f->fmt.pix.pixelformat = dev->capture.fmt->fourcc;
f->fmt.pix.bytesperline = dev->capture.stride;
f->fmt.pix.sizeimage = dev->capture.buffersize;
if (dev->capture.fmt->fourcc == V4L2_PIX_FMT_RGB24)
f->fmt.pix.colorspace = V4L2_COLORSPACE_SRGB;
else if (dev->capture.fmt->fourcc == V4L2_PIX_FMT_JPEG)
f->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG;
else
f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
f->fmt.pix.priv = 0;
v4l2_dump_pix_format(1, bcm2835_v4l2_debug, &dev->v4l2_dev, &f->fmt.pix,
__func__);
return 0;
}
static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct bcm2835_mmal_dev *dev = video_drvdata(file);
struct mmal_fmt *mfmt;
mfmt = get_format(f);
if (!mfmt) {
v4l2_dbg(1, bcm2835_v4l2_debug, &dev->v4l2_dev,
"Fourcc format (0x%08x) unknown.\n",
f->fmt.pix.pixelformat);
f->fmt.pix.pixelformat = formats[0].fourcc;
mfmt = get_format(f);
}
f->fmt.pix.field = V4L2_FIELD_NONE;
v4l2_dbg(1, bcm2835_v4l2_debug, &dev->v4l2_dev,
"Clipping/aligning %dx%d format %08X\n",
f->fmt.pix.width, f->fmt.pix.height, f->fmt.pix.pixelformat);
v4l_bound_align_image(&f->fmt.pix.width, MIN_WIDTH, dev->max_width, 1,
&f->fmt.pix.height, MIN_HEIGHT, dev->max_height,
1, 0);
f->fmt.pix.bytesperline = f->fmt.pix.width * mfmt->ybbp;
if (!mfmt->remove_padding) {
if (mfmt->depth == 24) {
/*
* 24bpp is a pain as we can't use simple masking.
* Min stride is width aligned to 16, times 24bpp.
*/
f->fmt.pix.bytesperline =
((f->fmt.pix.width + 15) & ~15) * 3;
} else {
/*
* GPU isn't removing padding, so stride is aligned to
* 32
*/
int align_mask = ((32 * mfmt->depth) >> 3) - 1;
f->fmt.pix.bytesperline =
(f->fmt.pix.bytesperline + align_mask) &
~align_mask;
}
v4l2_dbg(1, bcm2835_v4l2_debug, &dev->v4l2_dev,
"Not removing padding, so bytes/line = %d\n",
f->fmt.pix.bytesperline);
}
/* Image buffer has to be padded to allow for alignment, even though
* we sometimes then remove that padding before delivering the buffer.
*/
f->fmt.pix.sizeimage = ((f->fmt.pix.height + 15) & ~15) *
(((f->fmt.pix.width + 31) & ~31) * mfmt->depth) >> 3;
if ((mfmt->flags & V4L2_FMT_FLAG_COMPRESSED) &&
f->fmt.pix.sizeimage < MIN_BUFFER_SIZE)
f->fmt.pix.sizeimage = MIN_BUFFER_SIZE;
if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_RGB24)
f->fmt.pix.colorspace = V4L2_COLORSPACE_SRGB;
else if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_JPEG)
f->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG;
else
f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
f->fmt.pix.priv = 0;
v4l2_dbg(1, bcm2835_v4l2_debug, &dev->v4l2_dev,
"Now %dx%d format %08X\n",
f->fmt.pix.width, f->fmt.pix.height, f->fmt.pix.pixelformat);
v4l2_dump_pix_format(1, bcm2835_v4l2_debug, &dev->v4l2_dev, &f->fmt.pix,