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path: root/drivers/usb/gadget/function/uvc_v4l2.c
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Diffstat (limited to 'drivers/usb/gadget/function/uvc_v4l2.c')
-rw-r--r--drivers/usb/gadget/function/uvc_v4l2.c294
1 files changed, 290 insertions, 4 deletions
diff --git a/drivers/usb/gadget/function/uvc_v4l2.c b/drivers/usb/gadget/function/uvc_v4l2.c
index fd8f73bb726d..c4ed48d6b8a4 100644
--- a/drivers/usb/gadget/function/uvc_v4l2.c
+++ b/drivers/usb/gadget/function/uvc_v4l2.c
@@ -18,12 +18,161 @@
#include <media/v4l2-dev.h>
#include <media/v4l2-event.h>
#include <media/v4l2-ioctl.h>
+#include <media/v4l2-uvc.h>
#include "f_uvc.h"
#include "uvc.h"
#include "uvc_queue.h"
#include "uvc_video.h"
#include "uvc_v4l2.h"
+#include "uvc_configfs.h"
+
+static struct uvc_format_desc *to_uvc_format(struct uvcg_format *uformat)
+{
+ char guid[16] = UVC_GUID_FORMAT_MJPEG;
+ struct uvc_format_desc *format;
+ struct uvcg_uncompressed *unc;
+
+ if (uformat->type == UVCG_UNCOMPRESSED) {
+ unc = to_uvcg_uncompressed(&uformat->group.cg_item);
+ if (!unc)
+ return ERR_PTR(-EINVAL);
+
+ memcpy(guid, unc->desc.guidFormat, sizeof(guid));
+ }
+
+ format = uvc_format_by_guid(guid);
+ if (!format)
+ return ERR_PTR(-EINVAL);
+
+ return format;
+}
+
+static int uvc_v4l2_get_bytesperline(struct uvcg_format *uformat,
+ struct uvcg_frame *uframe)
+{
+ struct uvcg_uncompressed *u;
+
+ if (uformat->type == UVCG_UNCOMPRESSED) {
+ u = to_uvcg_uncompressed(&uformat->group.cg_item);
+ if (!u)
+ return 0;
+
+ return u->desc.bBitsPerPixel * uframe->frame.w_width / 8;
+ }
+
+ return 0;
+}
+
+static int uvc_get_frame_size(struct uvcg_format *uformat,
+ struct uvcg_frame *uframe)
+{
+ unsigned int bpl = uvc_v4l2_get_bytesperline(uformat, uframe);
+
+ return bpl ? bpl * uframe->frame.w_height :
+ uframe->frame.dw_max_video_frame_buffer_size;
+}
+
+static struct uvcg_format *find_format_by_index(struct uvc_device *uvc, int index)
+{
+ struct uvcg_format_ptr *format;
+ struct uvcg_format *uformat = NULL;
+ int i = 1;
+
+ list_for_each_entry(format, &uvc->header->formats, entry) {
+ if (index == i) {
+ uformat = format->fmt;
+ break;
+ }
+ i++;
+ }
+
+ return uformat;
+}
+
+static struct uvcg_frame *find_frame_by_index(struct uvc_device *uvc,
+ struct uvcg_format *uformat,
+ int index)
+{
+ struct uvcg_format_ptr *format;
+ struct uvcg_frame_ptr *frame;
+ struct uvcg_frame *uframe = NULL;
+
+ list_for_each_entry(format, &uvc->header->formats, entry) {
+ if (format->fmt->type != uformat->type)
+ continue;
+ list_for_each_entry(frame, &format->fmt->frames, entry) {
+ if (index == frame->frm->frame.b_frame_index) {
+ uframe = frame->frm;
+ break;
+ }
+ }
+ }
+
+ return uframe;
+}
+
+static struct uvcg_format *find_format_by_pix(struct uvc_device *uvc,
+ u32 pixelformat)
+{
+ struct uvcg_format_ptr *format;
+ struct uvcg_format *uformat = NULL;
+
+ list_for_each_entry(format, &uvc->header->formats, entry) {
+ struct uvc_format_desc *fmtdesc = to_uvc_format(format->fmt);
+
+ if (fmtdesc->fcc == pixelformat) {
+ uformat = format->fmt;
+ break;
+ }
+ }
+
+ return uformat;
+}
+
+static struct uvcg_frame *find_closest_frame_by_size(struct uvc_device *uvc,
+ struct uvcg_format *uformat,
+ u16 rw, u16 rh)
+{
+ struct uvc_video *video = &uvc->video;
+ struct uvcg_format_ptr *format;
+ struct uvcg_frame_ptr *frame;
+ struct uvcg_frame *uframe = NULL;
+ unsigned int d, maxd;
+
+ /* Find the closest image size. The distance between image sizes is
+ * the size in pixels of the non-overlapping regions between the
+ * requested size and the frame-specified size.
+ */
+ maxd = (unsigned int)-1;
+
+ list_for_each_entry(format, &uvc->header->formats, entry) {
+ if (format->fmt->type != uformat->type)
+ continue;
+
+ list_for_each_entry(frame, &format->fmt->frames, entry) {
+ u16 w, h;
+
+ w = frame->frm->frame.w_width;
+ h = frame->frm->frame.w_height;
+
+ d = min(w, rw) * min(h, rh);
+ d = w*h + rw*rh - 2*d;
+ if (d < maxd) {
+ maxd = d;
+ uframe = frame->frm;
+ }
+
+ if (maxd == 0)
+ break;
+ }
+ }
+
+ if (!uframe)
+ uvcg_dbg(&video->uvc->func, "Unsupported size %ux%u\n", rw, rh);
+
+ return uframe;
+}
/* --------------------------------------------------------------------------
* Requests handling
@@ -67,9 +216,9 @@ uvc_v4l2_querycap(struct file *file, void *fh, struct v4l2_capability *cap)
struct uvc_device *uvc = video_get_drvdata(vdev);
struct usb_composite_dev *cdev = uvc->func.config->cdev;
- strlcpy(cap->driver, "g_uvc", sizeof(cap->driver));
- strlcpy(cap->card, cdev->gadget->name, sizeof(cap->card));
- strlcpy(cap->bus_info, dev_name(&cdev->gadget->dev),
+ strscpy(cap->driver, "g_uvc", sizeof(cap->driver));
+ strscpy(cap->card, cdev->gadget->name, sizeof(cap->card));
+ strscpy(cap->bus_info, dev_name(&cdev->gadget->dev),
sizeof(cap->bus_info));
return 0;
}
@@ -135,6 +284,139 @@ uvc_v4l2_set_format(struct file *file, void *fh, struct v4l2_format *fmt)
}
static int
+uvc_v4l2_try_format(struct file *file, void *fh, struct v4l2_format *fmt)
+{
+ struct video_device *vdev = video_devdata(file);
+ struct uvc_device *uvc = video_get_drvdata(vdev);
+ struct uvc_video *video = &uvc->video;
+ struct uvcg_format *uformat;
+ struct uvcg_frame *uframe;
+ u8 *fcc;
+
+ if (fmt->type != video->queue.queue.type)
+ return -EINVAL;
+
+ fcc = (u8 *)&fmt->fmt.pix.pixelformat;
+ uvcg_dbg(&uvc->func, "Trying format 0x%08x (%c%c%c%c): %ux%u\n",
+ fmt->fmt.pix.pixelformat,
+ fcc[0], fcc[1], fcc[2], fcc[3],
+ fmt->fmt.pix.width, fmt->fmt.pix.height);
+
+ uformat = find_format_by_pix(uvc, fmt->fmt.pix.pixelformat);
+ if (!uformat)
+ return -EINVAL;
+
+ uframe = find_closest_frame_by_size(uvc, uformat,
+ fmt->fmt.pix.width, fmt->fmt.pix.height);
+ if (!uframe)
+ return -EINVAL;
+
+ fmt->fmt.pix.width = uframe->frame.w_width;
+ fmt->fmt.pix.height = uframe->frame.w_height;
+ fmt->fmt.pix.field = V4L2_FIELD_NONE;
+ fmt->fmt.pix.bytesperline = uvc_v4l2_get_bytesperline(uformat, uframe);
+ fmt->fmt.pix.sizeimage = uvc_get_frame_size(uformat, uframe);
+ fmt->fmt.pix.pixelformat = to_uvc_format(uformat)->fcc;
+ fmt->fmt.pix.colorspace = V4L2_COLORSPACE_SRGB;
+ fmt->fmt.pix.priv = 0;
+
+ return 0;
+}
+
+static int
+uvc_v4l2_enum_frameintervals(struct file *file, void *fh,
+ struct v4l2_frmivalenum *fival)
+{
+ struct video_device *vdev = video_devdata(file);
+ struct uvc_device *uvc = video_get_drvdata(vdev);
+ struct uvcg_format *uformat = NULL;
+ struct uvcg_frame *uframe = NULL;
+ struct uvcg_frame_ptr *frame;
+
+ uformat = find_format_by_pix(uvc, fival->pixel_format);
+ if (!uformat)
+ return -EINVAL;
+
+ list_for_each_entry(frame, &uformat->frames, entry) {
+ if (frame->frm->frame.w_width == fival->width &&
+ frame->frm->frame.w_height == fival->height) {
+ uframe = frame->frm;
+ break;
+ }
+ }
+ if (!uframe)
+ return -EINVAL;
+
+ if (fival->index >= uframe->frame.b_frame_interval_type)
+ return -EINVAL;
+
+ fival->discrete.numerator =
+ uframe->dw_frame_interval[fival->index];
+
+ /* TODO: handle V4L2_FRMIVAL_TYPE_STEPWISE */
+ fival->type = V4L2_FRMIVAL_TYPE_DISCRETE;
+ fival->discrete.denominator = 10000000;
+ v4l2_simplify_fraction(&fival->discrete.numerator,
+ &fival->discrete.denominator, 8, 333);
+
+ return 0;
+}
+
+static int
+uvc_v4l2_enum_framesizes(struct file *file, void *fh,
+ struct v4l2_frmsizeenum *fsize)
+{
+ struct video_device *vdev = video_devdata(file);
+ struct uvc_device *uvc = video_get_drvdata(vdev);
+ struct uvcg_format *uformat = NULL;
+ struct uvcg_frame *uframe = NULL;
+
+ uformat = find_format_by_pix(uvc, fsize->pixel_format);
+ if (!uformat)
+ return -EINVAL;
+
+ if (fsize->index >= uformat->num_frames)
+ return -EINVAL;
+
+ uframe = find_frame_by_index(uvc, uformat, fsize->index + 1);
+ if (!uframe)
+ return -EINVAL;
+
+ fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
+ fsize->discrete.width = uframe->frame.w_width;
+ fsize->discrete.height = uframe->frame.w_height;
+
+ return 0;
+}
+
+static int
+uvc_v4l2_enum_format(struct file *file, void *fh, struct v4l2_fmtdesc *f)
+{
+ struct video_device *vdev = video_devdata(file);
+ struct uvc_device *uvc = video_get_drvdata(vdev);
+ struct uvc_format_desc *fmtdesc;
+ struct uvcg_format *uformat;
+
+ if (f->index >= uvc->header->num_fmt)
+ return -EINVAL;
+
+ uformat = find_format_by_index(uvc, f->index + 1);
+ if (!uformat)
+ return -EINVAL;
+
+ if (uformat->type != UVCG_UNCOMPRESSED)
+ f->flags |= V4L2_FMT_FLAG_COMPRESSED;
+
+ fmtdesc = to_uvc_format(uformat);
+ f->pixelformat = fmtdesc->fcc;
+
+ strscpy(f->description, fmtdesc->name, sizeof(f->description));
+ f->description[strlen(fmtdesc->name) - 1] = 0;
+
+ return 0;
+}
+
+static int
uvc_v4l2_reqbufs(struct file *file, void *fh, struct v4l2_requestbuffers *b)
{
struct video_device *vdev = video_devdata(file);
@@ -170,7 +452,7 @@ uvc_v4l2_qbuf(struct file *file, void *fh, struct v4l2_buffer *b)
return ret;
if (uvc->state == UVC_STATE_STREAMING)
- schedule_work(&video->pump);
+ queue_work(video->async_wq, &video->pump);
return ret;
}
@@ -298,8 +580,12 @@ uvc_v4l2_ioctl_default(struct file *file, void *fh, bool valid_prio,
const struct v4l2_ioctl_ops uvc_v4l2_ioctl_ops = {
.vidioc_querycap = uvc_v4l2_querycap,
+ .vidioc_try_fmt_vid_out = uvc_v4l2_try_format,
.vidioc_g_fmt_vid_out = uvc_v4l2_get_format,
.vidioc_s_fmt_vid_out = uvc_v4l2_set_format,
+ .vidioc_enum_frameintervals = uvc_v4l2_enum_frameintervals,
+ .vidioc_enum_framesizes = uvc_v4l2_enum_framesizes,
+ .vidioc_enum_fmt_vid_out = uvc_v4l2_enum_format,
.vidioc_reqbufs = uvc_v4l2_reqbufs,
.vidioc_querybuf = uvc_v4l2_querybuf,
.vidioc_qbuf = uvc_v4l2_qbuf,