Skip to content

cloud-kernel
cloud-kernel

openanolis / cloud-kernel
1 年多 前同步成功

通知 161
Star 36
Fork 7
cloud-kernel
cloud-kernel
切换分支/标签
  1. 07 6月, 2016 1 次提交
  3. 19 12月, 2015 1 次提交
  5. 18 12月, 2015 1 次提交
  7. 01 10月, 2015 1 次提交
  9. 26 9月, 2015 1 次提交
  11. 30 5月, 2015 1 次提交
  13. 27 1月, 2015 1 次提交
    • A
      [media] uvcvideo: Remove extra commit on resume() · 9fae30ac
      由 Aviv Greenberg 提交于 
      The UVC spec is a bit vague wrt devices using bulk endpoints,
specifically, how to signal to a device to start streaming.

For devices using isoc endpoints, the sequence for start streaming is:
1) The host sends PROBE_CONTROL(SET_CUR) PROBE_CONTROL(GET_CUR)
2) Host selects desired config and calls COMMIT_CONTROL(SET_CUR)
3) Host selects an alt interface other then zero - e.g SELECT_ALTERNATE_INTERFACE(1)
4) The device starts streaming

However for devices using bulk endpoints, there must be *no* alt interface
other than setting zero. From the UVC spec:
"A VideoStreaming interface containing a bulk endpoint for streaming shall
support only alternate setting zero. Additional alternate settings containing
bulk endpoints are not permitted in a device that is compliant with the Video
Class specification."

So for devices using bulk endpoints, step #3 above is irrelevant, and thus
cannot be used as an indication for the device to start streaming.
So in practice, such devices start streaming immediately after a
COMMIT_CONTROL(SET_CUR).

In the uvc resume() handler, an unsolicited commit is sent, which causes
devices using bulk endpoints to start streaming unintentionally.

This patch modifies resume() handler to send a commit only if streaming
needs to be reestablished, i.e if the device was actually streaming before is
was suspended.
Signed-off-by: NAviv Greenberg <aviv.d.greenberg@intel.com>
Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>
      9fae30ac
  15. 25 11月, 2014 2 次提交
  17. 21 10月, 2014 1 次提交
    • L
      [media] v4l: uvcvideo: Fix buffer completion size check · c601f53f
      由 Laurent Pinchart 提交于 
      Commit e93e7fd9 ("v4l2: uvcvideo: Allow
using larger buffers") reworked the buffer size sanity check at buffer
completion time to use the frame size instead of the allocated buffer
size. However, it introduced two bugs in doing so:

- it assigned the allocated buffer size to the frame_size field, instead
  of assigning the correct frame size

- it performed the assignment in the S_FMT handler, resulting in the
  frame_size field being uninitialized if the userspace application
  doesn't call S_FMT.

Fix both issues by removing the frame_size field and validating the
buffer size against the UVC video control dwMaxFrameSize.

Fixes: e93e7fd9 ("v4l2: uvcvideo: Allow using larger buffers")
Signed-off-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>
      c601f53f
  19. 22 9月, 2014 2 次提交
  21. 03 9月, 2014 1 次提交
  23. 23 5月, 2014 2 次提交
  25. 06 3月, 2014 1 次提交
    • O
      [media] uvcvideo: Do not use usb_set_interface on bulk EP · b1e43f23
      由 Oleksij Rempel 提交于 
      The UVC specification uses alternate setting selection to notify devices
of stream start/stop. This breaks when using bulk-based devices, as the
video streaming interface has a single alternate setting in that case,
making video stream start and video stream stop events to appear
identical to the device. Bulk-based devices are thus not well supported
by UVC.

The webcam built in the Asus Zenbook UX302LA ignores the set interface
request and will keep the video stream enabled when the driver tries to
stop it. If USB autosuspend is enabled the device will then be suspended
and will crash, requiring a cold reboot.

USB trace capture showed that Windows sends a CLEAR_FEATURE(HALT)
request to the bulk endpoint when stopping the stream instead of
selecting alternate setting 0. The camera then behaves correctly, and
thus seems to require that behaviour.

Replace selection of alternate setting 0 with clearing of the endpoint
halt feature at video stream stop for bulk-based devices. Let's refrain
from blaming Microsoft this time, as it's not clear whether this
Windows-specific but USB-compliant behaviour was specifically developed
to handle bulkd-based UVC devices, or if the camera just took advantage
of it.

CC: stable@vger.kernel.org
Signed-off-by: NOleksij Rempel <linux@rempel-privat.de>
Signed-off-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>
      b1e43f23
  27. 01 3月, 2014 1 次提交
  29. 10 12月, 2013 1 次提交
  31. 30 11月, 2013 1 次提交
  33. 08 11月, 2013 1 次提交
    • M
      [media] uvc/lirc_serial: Fix some warnings on parisc arch · ce01cbdc
      由 Mauro Carvalho Chehab 提交于 
      On this arch, usec is not unsigned long. So, we need to typecast,
in order to remove those warnings:
	drivers/media/usb/uvc/uvc_video.c: In function 'uvc_video_clock_update':
	drivers/media/usb/uvc/uvc_video.c:678:2: warning: format '%lu' expects argument of type 'long unsigned int', but argument 9 has type '__kernel_suseconds_t' [-Wformat]
	drivers/staging/media/lirc/lirc_serial.c: In function 'irq_handler':
	drivers/staging/media/lirc/lirc_serial.c:707:5: warning: format '%lx' expects argument of type 'long unsigned int', but argument 6 has type '__kernel_suseconds_t' [-Wformat]
	drivers/staging/media/lirc/lirc_serial.c:707:5: warning: format '%lx' expects argument of type 'long unsigned int', but argument 7 has type '__kernel_suseconds_t' [-Wformat]
	drivers/staging/media/lirc/lirc_serial.c:719:5: warning: format '%lx' expects argument of type 'long unsigned int', but argument 6 has type '__kernel_suseconds_t' [-Wformat]
	drivers/staging/media/lirc/lirc_serial.c:719:5: warning: format '%lx' expects argument of type 'long unsigned int', but argument 7 has type '__kernel_suseconds_t' [-Wformat]
	drivers/staging/media/lirc/lirc_serial.c:728:6: warning: format '%lx' expects argument of type 'long unsigned int', but argument 6 has type '__kernel_suseconds_t' [-Wformat]
	drivers/staging/media/lirc/lirc_serial.c:728:6: warning: format '%lx' expects argument of type 'long unsigned int', but argument 7 has type '__kernel_suseconds_t' [-Wformat]
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>
Acked-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>
      ce01cbdc
  35. 28 11月, 2012 1 次提交
  37. 06 10月, 2012 1 次提交
  39. 16 8月, 2012 1 次提交
  41. 14 8月, 2012 1 次提交
  43. 07 7月, 2012 2 次提交
  45. 09 4月, 2012 1 次提交
  47. 28 2月, 2012 1 次提交
  49. 11 12月, 2011 9 次提交
  51. 24 9月, 2011 1 次提交
  53. 22 9月, 2011 1 次提交
  55. 06 8月, 2011 1 次提交