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path: root/drivers/media/video/uvc/uvc_video.c
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* V4L/DVB: uvcvideo: Drop corrupted compressed framesLaurent Pinchart2010-08-081-8/+11
| | | | | | | | | | | | | | | Corrupted video frames are dropped by default by the driver for uncompressed formats. Data corruption is not less problematic for compressed formats, so frame drop should be enabled by default for those formats as well. Mark buffers as faulty when an isochronous packet loss is detected for any format, or when the buffer length doesn't match the image size for uncompressed formats. Drop erroneous buffers regardless of whether the format is compressed or uncompressed. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* USB: rename usb_buffer_alloc() and usb_buffer_free() usersDaniel Mack2010-05-201-2/+2
| | | | | | | | | | | | | | | | | | For more clearance what the functions actually do, usb_buffer_alloc() is renamed to usb_alloc_coherent() usb_buffer_free() is renamed to usb_free_coherent() They should only be used in code which really needs DMA coherency. All call sites have been changed accordingly, except for staging drivers. Signed-off-by: Daniel Mack <daniel@caiaq.de> Cc: Alan Stern <stern@rowland.harvard.edu> Cc: Pedro Ribeiro <pedrib@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* include cleanup: Update gfp.h and slab.h includes to prepare for breaking ↵Tejun Heo2010-03-301-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
* V4L/DVB (13827): uvcvideo: Switch to a monotonic clock for V4L2 buffers ↵Laurent Pinchart2010-02-261-0/+10
| | | | | | | | | | | | | | | | | | | | timestamps The realtime clock provided by do_gettimeofday() is affected by time jumps caused by NTP or DST. Furthermore, preliminary investigation showed that SMP systems the realtime clock is based on the CPU TSC, and those could get slightly out of sync, resulting in jitter in the timestamps depending on which processor handles the USB interrupts. Instead of the realtime clock, use a monotonic high resolution clock to timestamp the buffer. As this could in theory introduce a regression with some userspace applications expecting a realtime clock timestamp, add a module parameter to switch back to the realtime clock. Thanks to Paulo Assis for pointing out and investigating the issue. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (13831): uvcvideo: Fix oops caused by a race condition in buffer ↵Laurent Pinchart2010-01-171-8/+6
| | | | | | | | | | | | | | | | dequeuing Buffers were marked as done before being removed from the IRQ queue. If a userspace application dequeued and requeued the buffer fast enough during that time window, the buffer could end up being deleted twice, generating an oops in interrupt context. Add a new state, UVC_BUF_STATE_READY, to mark buffers as ready for reuse but not yet removed from the queue, and transition to UVC_BUF_STATE_DONE only when the buffer is removed from the queue. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (13829): uvcvideo: Fix alternate setting selection in isochronous modeLaurent Pinchart2010-01-171-9/+22
| | | | | | | | | Unlike assumed by the driver, alternate settings are not sorted by endpoint max packet size. Iterate over all alternate settings to find the one with the smallest compatible max packet size. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (13610): uvc: Correct size given to memsetJulia Lawall2009-12-161-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | Memset should be given the size of the structure, not the size of the pointer. The semantic patch that makes this change is as follows: (http://coccinelle.lip6.fr/) // <smpl> @@ type T; T *x; expression E; @@ memset(x, E, sizeof( + * x)) // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Douglas Schilling Landgraf <dougsland@redhat.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (13155): uvcvideo: Add a module parameter to set the streaming ↵Laurent Pinchart2009-12-051-2/+2
| | | | | | | | | | | | | | | | | | control timeout The default streaming control timeout was found by Ondrej Zary to be too low for some Logitech webcams. With kernel 2.6.22 and newer they would timeout during initialization unles the audio function was initialized before the video function. Add a module parameter to set the streaming control timeout and increase the default value from 1000ms to 3000ms to fix the above problem. Thanks to Ondrej Zary for investigating the issue and providing an initial patch. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (13153): uvcvideo: Fix uvc_alloc_urb_buffers()Ming Lei2009-12-051-2/+2
| | | | | | | | | | | | | | | | | | | | This patch sets stream->urb_size as psize*npackets before calling uvc_alloc_urb_buffers, which may fix a possible failure of usb_buffer_free in case usb_buffer_alloc returns NULL. The patch is based on the ideas below: 1,If usb_buffer_alloc can't allocate a buffer sucessfully, uvc_free_urb_buffers will be called to free the allocated buffers, and stream->urb_size is required to be passed to usb_buffer_free; 2,uvc_free_urb_buffers can reset stream->urb_size. This patch is against linux-v2.6.31-next-20090926. Signed-off-by: Ming Lei <tom.leiming@gmail.com> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (13149): uvcvideo: Add a new UVC_TRACE_VIDEO trace levelLaurent Pinchart2009-12-051-4/+14
| | | | | | | | Use the trace level for messages related to video URB buffers allocation and alternate setting selection. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (13309): uvcvideo: Ignore the FIX_BANDWIDTH for compressed videoLaurent Pinchart2009-11-071-1/+2
| | | | | | | | | The FIX_BANDWIDTH quirk tries to work around cameras requesting the maximum bandwidth regardless of the image size by computing a bandwidth estimate. This works only for uncompressed frames. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (13012): uvc: introduce missing kfreeJulia Lawall2009-09-191-3/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Move the kzalloc and associated test after the stream/query test, to avoid the need to free the allocated if the stream/query test fails. The semantic match that finds the problem is as follows: (http://www.emn.fr/x-info/coccinelle/) // <smpl> @r exists@ local idexpression x; statement S; expression E; identifier f,f1,l; position p1,p2; expression *ptr != NULL; @@ x@p1 = \(kmalloc\|kzalloc\|kcalloc\)(...); ... if (x == NULL) S <... when != x when != if (...) { <+...x...+> } ( x->f1 = E | (x->f1 == NULL || ...) | f(...,x->f1,...) ) ...> ( return \(0\|<+...x...+>\|ptr\); | return@p2 ...; ) @script:python@ p1 << r.p1; p2 << r.p2; @@ print "* file: %s kmalloc %s return %s" % (p1[0].file,p1[0].line,p2[0].line) // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Douglas Schilling Landgraf <dougsland@redhat.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (12379): uvcvideo: Multiple streaming interfaces supportLaurent Pinchart2009-09-121-1/+1
| | | | | | | | | | Restructure the UVC descriptors parsing code to handle multiple streaming interfaces. The driver now creates a uvc_video_chain instance for each chain detected in the UVC control interface descriptors, and tries to register one video device per streaming endpoint. Signed-off-by: Laurent Pinchart <laurent.pinchart@skynet.be> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (12378): uvcvideo: Restructure the driver to support multiple ↵Laurent Pinchart2009-09-121-201/+214
| | | | | | | | | | | simultaneous streams. As a first step towards multiple streaming interfaces support, reorganize the driver's data structures to cleanly separate video control and video streaming data. Signed-off-by: Laurent Pinchart <laurent.pinchart@skynet.be> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (12327): uvcvideo: Add PROBE_DEF quirk and enable it for the MT6227 ↵Laurent Pinchart2009-09-121-0/+3
| | | | | | | | | | | | device At least one MT6227 model crashes when receiving a GET_DEF request on the video probe control. As the various models can't be told apart based on the descriptors, add a PROBE_DEF quirk to avoid sending the GET_DEF request and enable the quirk for all models. Signed-off-by: Laurent Pinchart <laurent.pinchart@skynet.be> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (12185): uvcvideo: Prefix all UVC constants with UVC_Laurent Pinchart2009-09-121-13/+17
| | | | | | | | In preparation to moving UVC constants to a public location, prefix all constants with UVC_ to avoid namespace clashes. Signed-off-by: Laurent Pinchart <laurent.pinchart@skynet.be> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (11835): uvcvideo: Parse frame descriptors with non-continuous indexes.Laurent Pinchart2009-06-161-6/+11
| | | | | | | | | | The UVC specification requires frame descriptors indexes to range from 1 to the number of frame descriptors. At least some Hercules Dualpix Infinite webcams erroneously use non-continuous index ranges. Make the driver support them. Signed-off-by: Laurent Pinchart <laurent.pinchart@skynet.be> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (11575): uvcvideo: fix uvc resume failedMing Lei2009-05-091-1/+1
| | | | | | | | | | | | | Now urb buffers is not freed before suspend, so uvc_alloc_urb_buffers should return packet counts allocated originally during uvc resume, instead of zero. This version uses round down to return packet counts on Linus' suggestions, or else may lead to buffer destructed if packet size is changed before calling uvc_alloc_urb_buffers() in this kind of case. Signed-off-by: Ming Lei <tom.leiming@gmail.com> Acked-by: Laurent Pinchart <laurent.pinchart@skynet.be> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (10652): uvcvideo: Add quirk to override wrong bandwidth value for ↵Laurent Pinchart2009-03-301-4/+30
| | | | | | | | | | | | | | | | Vimicro devices At least 3 Vimicro cameras (0x332d, 0x3410 and 0x3420) fail to return correct bandwidth information. The first model rounds the value provided by the host to the nearest supported packet size, while the other two always request the maximum bandwidth. Introduce a device quirk to override the value returned by the device with an estimated bandwidth computed by the driver from the frame size and frame rate, and enable it for all Vimicro cameras. Signed-off-by: Laurent Pinchart <laurent.pinchart@skynet.be> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (10651): uvcvideo: Ignore empty bulk URBsLaurent Pinchart2009-03-301-0/+3
| | | | | | | | | Devices may send a zero-length packet to signal the end of a bulk payload. If the payload size is a multiple of the URB size the zero-length packet will be received by the URB completion handler. Handle this by ignoring all empty URBs. Signed-off-by: Laurent Pinchart <laurent.pinchart@skynet.be> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (10650): uvcvideo: Initialize streaming parameters with the probe ↵Laurent Pinchart2009-03-301-4/+13
| | | | | | | | | | | | control value The UVC specification requires SET_CUR requests on the streaming commit control to use values retrieved from a successful GET_CUR request on the probe control. Initialize streaming parameters with the probe control current value to make sure the driver always complies. Signed-off-by: Laurent Pinchart <laurent.pinchart@skynet.be> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (10295): uvcvideo: Retry URB buffers allocation when the system is ↵Laurent Pinchart2009-03-301-37/+42
| | | | | | | | | | | | | low on memory. URB buffers for video transfers are sized to UVC_MAX_PACKETS bulk/isochronous packets by default. If the system is too low on memory try successively smaller numbers of packets until allocation succeeds. Tested-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: Laurent Pinchart <laurent.pinchart@skynet.be> Reviewed-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (10199): uvcvideo: Fix GET_DEF failure detection.Laurent Pinchart2009-01-291-1/+1
| | | | | | | | | Commit 44f0079ec74330b457d990072c13cbe28b0f1abf erroneously considers all GET_DEF requests as unsuccessful. Fix this by checking the request return value. Signed-off-by: Laurent Pinchart <laurent.pinchart@skynet.be> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (10197): uvcvideo: Whitespace and comments cleanup, copyright updates.Laurent Pinchart2009-01-291-10/+18
| | | | | Signed-off-by: Laurent Pinchart <laurent.pinchart@skynet.be> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (10193): removed unused #include <version.h>'sHuang Weiyi2009-01-291-1/+0
| | | | | | | | | | | | | | | | | | Removed unused #include <version.h>'s in files below, drivers/media/video/cs5345.c drivers/media/video/pwc/pwc-if.c drivers/media/video/saa717x.c drivers/media/video/upd64031a.c drivers/media/video/upd64083.c drivers/media/video/uvc/uvc_ctrl.c drivers/media/video/uvc/uvc_driver.c drivers/media/video/uvc/uvc_queue.c drivers/media/video/uvc/uvc_video.c drivers/media/video/uvc/uvc_status.c Signed-off-by: Huang Weiyi <weiyi.huang@gmail.com> Acked-by: Laurent Pinchart <laurent.pinchart@skynet.be> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (10104): uvcvideo: Add support for video output devicesLaurent Pinchart2008-12-301-7/+95
| | | | | | | | | | | | | Extend the range of supported UVC devices by allowing video output devices matching the following structure: TT_STREAMING -> VC_PROCESSING_UNIT -> VC_EXTENSION_UNIT{0,n} -> OTT_* Video output devices are reported with the V4L2_CAP_VIDEO_OUTPUT capability flag and are subject to the same restrictions as video input devices. Signed-off-by: Laurent Pinchart <laurent.pinchart@skynet.be> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (10101): uvcvideo: Fix bulk URB processing when the header is erroneousLaurent Pinchart2008-12-301-10/+9
| | | | | | | | | | When the first bulk URB of a video payload contains an erroneous header, or when no V4L2 buffer is available, the whole payload must be dropped. Change the skip logic to drop all bulk URBs until the end of the payload instead of the first one only. Signed-off-by: Laurent Pinchart <laurent.pinchart@skynet.be> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (9809): uvcvideo: Add nodrop module parameter to turn incomplete ↵Laurent Pinchart2008-12-301-1/+2
| | | | | | | | | | | frame drop off. The driver drops incomplete uncompressed video frames to avoid confusing userspace with corrupt data. Add a nodrop module parameter to turn that behaviour off and make all frames available to userspace. Signed-off-by: Laurent Pinchart <laurent.pinchart@skynet.be> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (9661): uvcvideo: Commit streaming parameters when enabling the ↵Laurent Pinchart2008-12-291-4/+5
| | | | | | | | | | | | | | | | | | | | | | | video stream Sonix-based cameras seem to require the host to commit video streaming parameters before selecting the alternate endpoint. While most applications issue a VIDIOC_S_FMT ioctl before starting streaming, this is not required by the V4L2 specification. The problem has been noticed on Ubuntu 8.10 with applications using libv4l. The library blocks VIDIOC_S_FMT calls when the requested format is identical to the currently selected format. As the driver commits video streaming parameters when initialising the device, only the first run of a libv4l-enabled application would succeed. For the sake of completeness, experiment showed that the camera keeps sending 12 bytes isochronous packets (header only, no data) without toggling the FID bit if video streaming parameters haven't been committed before selecting the alternate endpoint. Signed-off-by: Laurent Pinchart <laurent.pinchart@skynet.be> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (9659): uvcvideo: Use {get|set}_unaligned_le32 macrosLaurent Pinchart2008-12-291-12/+6
| | | | | | | | Replace combination of endianess conversion and unaligned access macros with {get|set}_unaligned_*. Signed-off-by: Laurent Pinchart <laurent.pinchart@skynet.be> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (9570): uvcvideo: Handle failed video GET_{MIN|MAX|DEF} requests ↵Laurent Pinchart2008-12-291-11/+52
| | | | | | | | | | | | | more gracefully Failed requests will now generate a one-time warning message instead of the usual "Failed to query..." error, which should be more user-friendly. The driver will also recover automatically from failed GET_MIN/GET_MAX requests when the device is half-broken without requiring the MINMAX quirk (fully broken devices still need the quirk). Signed-off-by: Laurent Pinchart <laurent.pinchart@skynet.be> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (9031): uvcvideo: Fix incomplete frame drop when switching to a ↵Laurent Pinchart2008-10-121-0/+5
| | | | | | | | | | | | variable size format. When streaming in a fixed size format the driver sets a flag in the uvc_queue structure to drop incomplete incoming frames. The flag wasn't cleared when switching to a variable size format, which resulted in a broken 'MJPEG after YUV'. Signed-off-by: Laurent Pinchart <laurent.pinchart@skynet.be> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (8846): uvcvideo: Supress spurious "EOF in empty payload" trace messageLaurent Pinchart2008-10-121-2/+3
| | | | | | | | Pass the payload size instead of the header size to uvc_video_decode_end() to avoid generating an extra trace message for each frame. Signed-off-by: Laurent Pinchart <laurent.pinchart@skynet.be> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (8729): Use DIV_ROUND_UPJulia Lawall2008-10-121-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The kernel.h macro DIV_ROUND_UP performs the computation (((n) + (d) - 1) / (d)) but is perhaps more readable. An extract of the semantic patch that makes this change is as follows: (http://www.emn.fr/x-info/coccinelle/) // <smpl> @haskernel@ @@ @depends on haskernel@ expression n,d; @@ ( - (n + d - 1) / d + DIV_ROUND_UP(n,d) | - (n + (d - 1)) / d + DIV_ROUND_UP(n,d) ) @depends on haskernel@ expression n,d; @@ - DIV_ROUND_UP((n),d) + DIV_ROUND_UP(n,d) @depends on haskernel@ expression n,d; @@ - DIV_ROUND_UP(n,(d)) + DIV_ROUND_UP(n,d) // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* V4L/DVB (8617): uvcvideo: don't use stack-based buffers for USB transfers.Laurent Pinchart2008-08-061-11/+22
| | | | | | | | | Data buffers on the stack are not allowed for USB I/O. Use dynamically allocated buffers instead. Signed-off-by: Bruce Schmid <duck@freescale.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@skynet.be> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
* v4l-dvb: remove legacy checks to allow support for kernels < 2.6.10Hans Verkuil2008-07-201-0/+1
| | | | | | | | Also remove some blank lines that were used to split compat code at -devel tree. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
* V4L/DVB (8209): uvcvideo: Don't free URB buffers on suspend.Laurent Pinchart2008-07-201-32/+64
| | | | | | | | | All submitted URBs must be killed at suspend time, but URB buffers don't have to be freed. Avoiding a free on suspend/reallocate on resume lowers the presure on system memory. Signed-off-by: Laurent Pinchart <laurent.pinchart@skynet.be> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
* V4L/DVB (8208): uvcvideo: Use GFP_NOIO when allocating memory during resumeLaurent Pinchart2008-07-201-12/+12
| | | | | | | | | The swap device might still be asleep, so memory allocated in the resume handler must use GFP_NOIO. Thanks to Oliver Neukum for catching and reporting this bug. Signed-off-by: Laurent Pinchart <laurent.pinchart@skynet.be> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
* V4L/DVB (8145a): USB Video Class driverLaurent Pinchart2008-06-301-0/+934
This driver supports video input devices compliant with the USB Video Class specification. This means lots of currently manufactured webcams, and probably most of the future ones. Signed-off-by: Laurent Pinchart <laurent.pinchart@skynet.be> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
generated by cgit v1.1 at 2024-09-07 15:59:47 +0000