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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-09-08 01:01:14 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-09-08 01:01:14 -0300
commite5fd91f1ef340da553f7a79da9540c3db711c937 (patch)
treeb11842027dc6641da63f4bcc524f8678263304a3 /drivers/media/usb/uvc
parent2a9b0348e685a63d97486f6749622b61e9e3292f (diff)
Linux-libre 4.2-gnu
Diffstat (limited to 'drivers/media/usb/uvc')
-rw-r--r--drivers/media/usb/uvc/uvc_driver.c2
-rw-r--r--drivers/media/usb/uvc/uvc_queue.c12
-rw-r--r--drivers/media/usb/uvc/uvc_v4l2.c16
-rw-r--r--drivers/media/usb/uvc/uvc_video.c8
-rw-r--r--drivers/media/usb/uvc/uvcvideo.h7
5 files changed, 35 insertions, 10 deletions
diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c
index 5970dd6a1..4b5b3e8fb 100644
--- a/drivers/media/usb/uvc/uvc_driver.c
+++ b/drivers/media/usb/uvc/uvc_driver.c
@@ -1967,8 +1967,6 @@ static void uvc_disconnect(struct usb_interface *intf)
UVC_SC_VIDEOSTREAMING)
return;
- dev->state |= UVC_DEV_DISCONNECTED;
-
uvc_unregister_video(dev);
}
diff --git a/drivers/media/usb/uvc/uvc_queue.c b/drivers/media/usb/uvc/uvc_queue.c
index 87a19f33e..f16b9b426 100644
--- a/drivers/media/usb/uvc/uvc_queue.c
+++ b/drivers/media/usb/uvc/uvc_queue.c
@@ -270,6 +270,18 @@ int uvc_queue_buffer(struct uvc_video_queue *queue, struct v4l2_buffer *buf)
return ret;
}
+int uvc_export_buffer(struct uvc_video_queue *queue,
+ struct v4l2_exportbuffer *exp)
+{
+ int ret;
+
+ mutex_lock(&queue->mutex);
+ ret = vb2_expbuf(&queue->queue, exp);
+ mutex_unlock(&queue->mutex);
+
+ return ret;
+}
+
int uvc_dequeue_buffer(struct uvc_video_queue *queue, struct v4l2_buffer *buf,
int nonblocking)
{
diff --git a/drivers/media/usb/uvc/uvc_v4l2.c b/drivers/media/usb/uvc/uvc_v4l2.c
index c4b1ac675..2764f4360 100644
--- a/drivers/media/usb/uvc/uvc_v4l2.c
+++ b/drivers/media/usb/uvc/uvc_v4l2.c
@@ -483,9 +483,6 @@ static int uvc_v4l2_open(struct file *file)
uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_open\n");
stream = video_drvdata(file);
- if (stream->dev->state & UVC_DEV_DISCONNECTED)
- return -ENODEV;
-
ret = usb_autopm_get_interface(stream->dev->intf);
if (ret < 0)
return ret;
@@ -723,6 +720,18 @@ static int uvc_ioctl_qbuf(struct file *file, void *fh, struct v4l2_buffer *buf)
return uvc_queue_buffer(&stream->queue, buf);
}
+static int uvc_ioctl_expbuf(struct file *file, void *fh,
+ struct v4l2_exportbuffer *exp)
+{
+ struct uvc_fh *handle = fh;
+ struct uvc_streaming *stream = handle->stream;
+
+ if (!uvc_has_privileges(handle))
+ return -EBUSY;
+
+ return uvc_export_buffer(&stream->queue, exp);
+}
+
static int uvc_ioctl_dqbuf(struct file *file, void *fh, struct v4l2_buffer *buf)
{
struct uvc_fh *handle = fh;
@@ -1478,6 +1487,7 @@ const struct v4l2_ioctl_ops uvc_ioctl_ops = {
.vidioc_reqbufs = uvc_ioctl_reqbufs,
.vidioc_querybuf = uvc_ioctl_querybuf,
.vidioc_qbuf = uvc_ioctl_qbuf,
+ .vidioc_expbuf = uvc_ioctl_expbuf,
.vidioc_dqbuf = uvc_ioctl_dqbuf,
.vidioc_create_bufs = uvc_ioctl_create_bufs,
.vidioc_streamon = uvc_ioctl_streamon,
diff --git a/drivers/media/usb/uvc/uvc_video.c b/drivers/media/usb/uvc/uvc_video.c
index 20ccc9d31..f839654ea 100644
--- a/drivers/media/usb/uvc/uvc_video.c
+++ b/drivers/media/usb/uvc/uvc_video.c
@@ -119,6 +119,14 @@ static void uvc_fixup_video_ctrl(struct uvc_streaming *stream,
ctrl->dwMaxVideoFrameSize =
frame->dwMaxVideoFrameBufferSize;
+ /* The "TOSHIBA Web Camera - 5M" Chicony device (04f2:b50b) seems to
+ * compute the bandwidth on 16 bits and erroneously sign-extend it to
+ * 32 bits, resulting in a huge bandwidth value. Detect and fix that
+ * condition by setting the 16 MSBs to 0 when they're all equal to 1.
+ */
+ if ((ctrl->dwMaxPayloadTransferSize & 0xffff0000) == 0xffff0000)
+ ctrl->dwMaxPayloadTransferSize &= ~0xffff0000;
+
if (!(format->flags & UVC_FMT_FLAG_COMPRESSED) &&
stream->dev->quirks & UVC_QUIRK_FIX_BANDWIDTH &&
stream->intf->num_altsetting > 1) {
diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h
index 1b594c203..816dd1a0f 100644
--- a/drivers/media/usb/uvc/uvcvideo.h
+++ b/drivers/media/usb/uvc/uvcvideo.h
@@ -517,10 +517,6 @@ struct uvc_streaming {
} clock;
};
-enum uvc_device_state {
- UVC_DEV_DISCONNECTED = 1,
-};
-
struct uvc_device {
struct usb_device *udev;
struct usb_interface *intf;
@@ -529,7 +525,6 @@ struct uvc_device {
int intfnum;
char name[32];
- enum uvc_device_state state;
struct mutex lock; /* Protects users */
unsigned int users;
atomic_t nmappings;
@@ -635,6 +630,8 @@ extern int uvc_create_buffers(struct uvc_video_queue *queue,
struct v4l2_create_buffers *v4l2_cb);
extern int uvc_queue_buffer(struct uvc_video_queue *queue,
struct v4l2_buffer *v4l2_buf);
+extern int uvc_export_buffer(struct uvc_video_queue *queue,
+ struct v4l2_exportbuffer *exp);
extern int uvc_dequeue_buffer(struct uvc_video_queue *queue,
struct v4l2_buffer *v4l2_buf, int nonblocking);
extern int uvc_queue_streamon(struct uvc_video_queue *queue,