- 27 Jul, 2011 40 commits
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Hans de Goede authored
Allow multiple opens of the /dev/video node so that control panel apps can be open to-gether with streaming apps. Signed-off-by:
Hans de Goede <hdegoede@redhat.com> Signed-off-by:
Mauro Carvalho Chehab <mchehab@redhat.com>
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Hans de Goede authored
Doing a bunch of initialization every time /dev/video is opened, and thus for example when the udev rules probe for capabilities makes no sense, do it at driver load, resp. stream start instead. This is a preparation patch for allowing multiple opens of the /dev/video node. Signed-off-by:
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Hans de Goede authored
as vcinterface must be set before calling pwc_camera_power() Signed-off-by:
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Hans de Goede authored
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Hans de Goede authored
Having 2 ways of tracking disconnection is too much, remove both and instead simply set pdev->udev to NULL on disconnect. Also check for pdev->udev being NULL in all possible entry paths. Signed-off-by:
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Hans de Goede authored
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Hans de Goede authored
Looking at the pwc buffer management code has made it clear to me it needed some serious fixing. Not only was there a ton of code duplication even internally to pwc (read and mmap wait for frame code was duplicated), the code also was outright buggy. With the worst offender being dqbuf, which just round robin returned all the mmap buffers, without paying any attention to them being queued by the app with qbuf or not. And qbuf itself was a noop. So I set out to fix this and already had some cleanups in place when I read Jonathan Corbet's lwn article on videobuf2, this inspired me to just rip out the buffer management code and replace it with videobuf2, greatly reducing the amount of code, and fixing all bugs in one go: Many thanks to Jonathan for the timely article on this ! Signed-off-by:
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Hans de Goede authored
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Hans de Goede authored
The chances if any of these becoming NULL magically are 0% And if they do become NULL oopsing is the right thing to do (so that the user logs a bug with the kernel rather then with whatever app he was using). Returning EFAULT to userspace should only be done when userspace supplies a bad address, not on driver bugs / hw issues, so in the few cases where the check is not bogus return something else. Signed-off-by:
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Hans de Goede authored
Just like in userspace strncpy does not guarantee 0 termination. Use strlcpy instead which does guarantee 0 termination. Signed-off-by:
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Hans de Goede authored
Don't issue a stream stop to the camera at the end of sd_start, this fixes streaming with this particular model. Signed-off-by:
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Hans de Goede authored
Based on the old v4l1 camera by Jeroen Vreeken driver which recently got removed from the kernel. Signed-off-by:
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Hans de Goede authored
Reset image and image_len to NULL/0 on LAST_PACKET when we're in discard frame mode, just like we do when not discarding the current frame. The new se401 driver uses image_len for SOF/EOF detection and thus depends on this. Signed-off-by:
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Hans de Goede authored
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Jean-François Moine authored
In the webcam 041e:405f, the LED is inverted. Signed-off-by:
Jean-François Moine <moinejf@free.fr> Signed-off-by:
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Jean-François Moine authored
The sensor of some webcams could not be detected due to timing problems in sensor register reading. This patch adds bridge register readings before sensor register reading. Signed-off-by:
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Stefan Richter authored
Mauro Carvalho Chehab wrote: > I'm validating if all drivers are behaving equally with respect to the > error codes returned to userspace, and double-checking with the API. > > On almost all places, -EFAULT code is used only to indicate when > copy_from_user/copy_to_user fails. However, firedtv uses a lot of > -EFAULT, where it seems to me that other error codes should be used > instead (like -EIO for bus transfer errors and -EINVAL/-ERANGE for > invalid/out of range parameters). This concerns only the CI (CAM) related code of firedtv of which I know little. Let's just pass through the error returns of lower level I/O code where applicable, and -EACCES (permission denied) when a seemingly valid but negative FCP response or an unknown-to-firedtv CA message is received. Signed-off-by:
Stefan Richter <stefanr@s5r6.in-berlin.de> Cc: Henrik Kurelid <henrik@kurelid.se> Acked-by:
Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by:
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Mauro Carvalho Chehab authored
Those drivers are not relying at the V4L2 core to handle the ioctl's. So, we need to manually patch them every time a change goes to the core. Acked-by:
Mike Isely <isely@pobox.com> Signed-off-by:
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Mauro Carvalho Chehab authored
Currently, -EINVAL is used to return either when an IOCTL is not implemented, or if the ioctl was not implemented. Acked-by:
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Mauro Carvalho Chehab authored
While here, removes the bogus EINTERNAL error codes. Acked-by:
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Mauro Carvalho Chehab authored
Move generic stuff into gen-errors.xml, and remove them from DVB API. While here, removes two bogus error codes that aren't supported or used on Linux: EINTERNAL and ENOSIGNAL. Acked-by:
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Mauro Carvalho Chehab authored
When a device (or their PCI structs) are not found, the error should be -ENODEV. -EFAULT is reserved for errors while copying arguments from/to userspace. Acked-by:
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Mauro Carvalho Chehab authored
Remove generic errors from ioctl() descriptions. For other ioctl's, there's no generic section. So, just keep whatever is there. Acked-by:
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Mauro Carvalho Chehab authored
Remove generic errors from ioctl() descriptions. For other ioctl's, there's no generic section. So, just keep whatever is there. Also remove the EINTERNAL error code, as no DVB driver returns it, and this error code is not defined on POSIX or on Linux. Acked-by:
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Mauro Carvalho Chehab authored
Just like the V4L, MC and LIRC API's, point to the generic error chapter for ioctl's. This will allow moving generic error codes to just one place inside all media API's. A latter patch will remove the generic errors from each specific ioctl. Acked-by:
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Mauro Carvalho Chehab authored
data from/to userspace. Don't mix it with I2C bus error (-EIO). Acked-by:
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Mauro Carvalho Chehab authored
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Mauro Carvalho Chehab authored
Add a reference for the generic error code chapter to LIRC ioctl description. Acked-by:
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Mauro Carvalho Chehab authored
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Mauro Carvalho Chehab authored
V4L ioctl function descripton also has a generic error chapter. Remove it, as it is now obsoleted by a general, multi-API generic error descriptions. Acked-by:
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Mauro Carvalho Chehab authored
The EBUSY is already described as a generic error condition, with a similar text. Acked-by:
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Mauro Carvalho Chehab authored
Instead of having their own generic error codes at the MC API, move its section to the generic one and be sure that all media ioctl's will point to it. Acked-by:
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Mauro Carvalho Chehab authored
Be sure that all VIDIOC_* ioctl are using the return error macro, and aren't specifying generic error codes internally. Acked-by:
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Mauro Carvalho Chehab authored
There are several errors reported by V4L that aren't described. They can occur on almost all ioctl's. Instead of adding them into each ioctl, create a new chapter. For V4L, the new chapter will automatically be listed on all places, as there's a macro used everywhere there. Acked-by:
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Jonathan Corbet authored
Scatter/gather DMA mode works nicely on this platform and is clearly the best way of doing things. Signed-off-by:
Jonathan Corbet <corbet@lwn.net> Signed-off-by:
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Jonathan Corbet authored
The core Marvell camera driver can now do scatter/gather DMA on controllers which support that functionality. Signed-off-by:
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Hans Verkuil authored
Normally no control events will go to the filehandle that called the VIDIOC_S_CTRL/VIDIOC_S_EXT_CTRLS ioctls. This is to prevent a feedback loop. This can now be overridden by setting the new V4L2_EVENT_SUB_FL_ALLOW_FEEDBACK flag. Based on suggestions from Mauro Carvalho Chehab <mchehab@redhat.com> and Laurent Pinchart <laurent.pinchart@ideasonboard.com>. Signed-off-by:
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Hans Verkuil authored
It's getting confusing who is linking to what, so add an overview at the start of the header. Signed-off-by:
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Hans Verkuil authored
Thanks to Laurent Pinchart <laurent.pinchart@ideasonboard.com>. Signed-off-by:
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Hans Verkuil authored
Starting with v3.1 the V4L2 API provides certain guarantees with respect to events. Document these. Signed-off-by:
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