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path: root/drivers/media/video/uvc/uvc_video.c
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2012-08-15[media] rename most media/video usb drivers to media/usbMauro Carvalho Chehab1-1879/+0
Rename all USB drivers with their own directory under drivers/media/video into drivers/media/usb and update the building system. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-08-13[media] uvcvideo: Support super speed endpointsLaurent Pinchart1-6/+24
Compute the maximum number of bytes per interval using the burst and multiplier values for super speed endpoints. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-07-06[media] uvcvideo: Fix alternate setting selectionLaurent Pinchart1-1/+1
The alternate setting number is not equal to the alternate setting index in the interface alternate settings table. Use the alternate setting number from the interface descriptor when calling usb_set_interface(). Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Ming Lei <ming.lei@canonical.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-07-06[media] uvcvideo: Fix frame drop in bulk video streamJayakrishnan1-1/+5
When video endpoint is configured as bulk, a ZLP is sent after every video frames with size as multiple of 512 bytes. This is done so that host can detect end of transfer and pass data for processing. Still, frames that are multiple of 16K in size gets dropped. The ZLP sent by camera is ignored by uvc_video_decode_bulk(). The makes sure that the ZLP is not part of a video frame before ignoring it. If ZLP follows a video frame, then it triggers completion callback. [mchehab@redhat.com: Fix a small CodingStyle issue] Signed-off-by: Jayakrishnan Memana <jayakrishnan.memana@maxim-ic.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-04-09[media] uvcvideo: Fix race-related crash in uvc_video_clock_update()Laurent Pinchart1-18/+32
The driver frees the clock samples buffer before stopping the video buffers queue. If a DQBUF call arrives in-between, uvc_video_clock_update() will be called with a NULL clock samples buffer, leading to a crash. This occurs very frequently when using the webcam with the flash browser plugin. Move clock initialization/cleanup to uvc_video_enable() in order to free the clock samples buffer after the queue is stopped. Make sure the clock is reset at resume time to avoid miscalculating timestamps. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Cc: stable@vger.kernel.org Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-02-27[media] [FOR,v3.3] uvcvideo: Avoid division by 0 in timestamp calculationLaurent Pinchart1-5/+9
Use system timestamps if the timestamp can't be computed from the data sent by the device. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-12-11[media] uvcvideo: Add UVC timestamps supportLaurent Pinchart1-0/+330
UVC devices transmit a device timestamp along with video frames. Convert the timestamp to a host timestamp and use it to fill the V4L2 buffer timestamp field. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-12-11[media] uvcvideo: Extract timestamp-related statisticsLaurent Pinchart1-2/+123
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-12-11[media] uvcvideo: Extract video stream statisticsAlexey Fisher1-2/+107
Export the statistics through debugfs. Signed-off-by: Alexey Fisher <bug-track@fisher-privat.net> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-12-11[media] uvcvideo: Don't skip erroneous payloadsLaurent Pinchart1-7/+7
Instead of skipping the payload completely, which would make the resulting image corrupted anyway, store the payload normally and mark the buffer as erroneous. If the no_drop module parameter is set to 1 the buffer will then be passed to userspace, and tt will then be up to the application to decide what to do with the buffer. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-12-11[media] uvcvideo: Make uvc_commit_video() staticLaurent Pinchart1-2/+2
The function is not used outside of its compilation unit. Make it static. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-12-11[media] uvcvideo: Remove duplicate definitions of UVC_STREAM_* macrosLaurent Pinchart1-10/+0
The macros are defined in both drivers/media/video/uvc/uvc_video.c and include/linux/usb/video.h. Remove definitions from the former. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-12-11[media] uvcvideo: Handle uvc_init_video() failure in uvc_video_enable()Laurent Pinchart1-2/+7
Turn streaming off (by selecting alternate setting 0) and disable the video buffers queue in the uvc_video_enable() error path. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-12-11[media] uvcvideo: Use videobuf2-vmallocLaurent Pinchart1-4/+5
Replace the current video buffers queue implementation with videobuf2-vmalloc. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-12-11[media] uvcvideo: Move fields from uvc_buffer::buf to uvc_bufferLaurent Pinchart1-11/+10
Add mem, length and bytesused fields to the uvc_buffer structure and use them instead of accessing the uvc_buffer::buf m.offset, length and bytesused fields directly. This prepares the driver to the conversion to videobuf2. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-09-23[media] media: Fix a UVC performance problem on systems with non-coherent DMAAl Cooper1-1/+16
The UVC driver uses usb_alloc_coherent() to allocate DMA data buffers. On systems without coherent DMA this ends up allocating buffers in uncached memory. The subsequent memcpy's done to coalesce the DMA chunks into contiguous buffers then run VERY slowly. On a MIPS test system the memcpy is about 200 times slower. This issue prevents the system from keeping up with 720p YUYV data at 10fps. The following patch uses kmalloc to alloc the DMA buffers instead of usb_alloc_coherent on systems without coherent DMA. With this patch the system was easily able to keep up with 720p at 10fps. Signed-off-by: Al Cooper <alcooperx@gmail.com> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-08-06[media] uvcvideo: Set alternate setting 0 on resume if the bus has been resetMing Lei1-1/+9
If the bus has been reset on resume, set the alternate setting to 0. This should be the default value, but some devices crash or otherwise misbehave if they don't receive a SET_INTERFACE request before any other video control request. Microdia's 0c45:6437 camera has been found to require this change or it will stop sending video data after resume. uvc_video.c] Signed-off-by: Ming Lei <ming.lei@canonical.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Cc: stable@kernel.org Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-07-26atomic: use <linux/atomic.h>Arun Sharma1-1/+1
This allows us to move duplicated code in <asm/atomic.h> (atomic_inc_not_zero() for now) to <linux/atomic.h> Signed-off-by: Arun Sharma <asharma@fb.com> Reviewed-by: Eric Dumazet <eric.dumazet@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: David Miller <davem@davemloft.net> Cc: Eric Dumazet <eric.dumazet@gmail.com> Acked-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-06-30[media] uvcvideo: Disable the queue when failing to startSjoerd Simons1-1/+3
When failing to start the camera we should disable the queue again, to rollback into the same initial state. Otherwise re-trying will always hit -EBUSY Signed-off-by: Sjoerd Simons <sjoerd.simons@collabora.co.uk> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-03-31Fix common misspellingsLucas De Marchi1-4/+4
Fixes generated by 'codespell' and manually reviewed. Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
2011-03-22[media] uvcvideo: Fix uvc_fixup_video_ctrl() format searchStephan Lachowsky1-5/+9
The scheme used to index format in uvc_fixup_video_ctrl() is not robust: format index is based on descriptor ordering, which does not necessarily match bFormatIndex ordering. Searching for first matching format will prevent uvc_fixup_video_ctrl() from using the wrong format/frame to make adjustments. Signed-off-by: Stephan Lachowsky <stephan.lachowsky@maxim-ic.com> Cc: stable@kernel.org Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2010-12-01[media] uvcvideo: Lock stream mutex when accessing format-related informationLaurent Pinchart1-3/+0
The stream mutex protects access to the struct uvc_streaming ctrl, cur_format and cur_frame fields as well as to the hardware probe control. Lock it appropriately. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2010-10-21[media] uvcvideo: Generate discontinuous sequence numbers when frames are lostLaurent Pinchart1-0/+9
Increase the sequence number of the v4l2_buffer structure regardless of any buffer states, so that discontinuous sequence numbers allow applications to detect lost video frames. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2010-10-21[media] uvcvideo: Set bandwidth to at least 1024 with the FIX_BANDWIDTH quirkLaurent Pinchart1-0/+9
The bandwidth estimate computed with the FIX_BANDIWDTH quirk is too low for many cameras. Don't use maximum packet sizes lower than 1024 bytes to try and work around the problem. According to measurements done on two different camera models, the value is high enough to get most resolutions working while not preventing two simultaneous VGA streams at 15 fps. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2010-10-21[media] uvcvideo: Update e-mail address and copyright noticesLaurent Pinchart1-2/+2
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2010-10-21[media] uvcvideo: Print query name in uvc_query_ctrl()Laurent Pinchart1-3/+27
Instead of printing the query hex value in error messages, print its name to make the messages more readable. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2010-08-08V4L/DVB: uvcvideo: Drop corrupted compressed framesLaurent Pinchart1-8/+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>
2010-05-20USB: rename usb_buffer_alloc() and usb_buffer_free() usersDaniel Mack1-2/+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>
2010-03-30include cleanup: Update gfp.h and slab.h includes to prepare for breaking ↵Tejun Heo1-0/+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>
2010-02-26V4L/DVB (13827): uvcvideo: Switch to a monotonic clock for V4L2 buffers ↵Laurent Pinchart1-0/+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>
2010-01-17V4L/DVB (13831): uvcvideo: Fix oops caused by a race condition in buffer ↵Laurent Pinchart1-8/+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>
2010-01-17V4L/DVB (13829): uvcvideo: Fix alternate setting selection in isochronous modeLaurent Pinchart1-9/+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>
2009-12-16V4L/DVB (13610): uvc: Correct size given to memsetJulia Lawall1-1/+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>
2009-12-05V4L/DVB (13155): uvcvideo: Add a module parameter to set the streaming ↵Laurent Pinchart1-2/+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>
2009-12-05V4L/DVB (13153): uvcvideo: Fix uvc_alloc_urb_buffers()Ming Lei1-2/+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>
2009-12-05V4L/DVB (13149): uvcvideo: Add a new UVC_TRACE_VIDEO trace levelLaurent Pinchart1-4/+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>
2009-11-07V4L/DVB (13309): uvcvideo: Ignore the FIX_BANDWIDTH for compressed videoLaurent Pinchart1-1/+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>
2009-09-19V4L/DVB (13012): uvc: introduce missing kfreeJulia Lawall1-3/+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>
2009-09-12V4L/DVB (12379): uvcvideo: Multiple streaming interfaces supportLaurent Pinchart1-1/+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>
2009-09-12V4L/DVB (12378): uvcvideo: Restructure the driver to support multiple ↵Laurent Pinchart1-201/+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>
2009-09-12V4L/DVB (12327): uvcvideo: Add PROBE_DEF quirk and enable it for the MT6227 ↵Laurent Pinchart1-0/+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>
2009-09-12V4L/DVB (12185): uvcvideo: Prefix all UVC constants with UVC_Laurent Pinchart1-13/+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>
2009-06-16V4L/DVB (11835): uvcvideo: Parse frame descriptors with non-continuous indexes.Laurent Pinchart1-6/+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>
2009-05-09V4L/DVB (11575): uvcvideo: fix uvc resume failedMing Lei1-1/+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>
2009-03-30V4L/DVB (10652): uvcvideo: Add quirk to override wrong bandwidth value for ↵Laurent Pinchart1-4/+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>
2009-03-30V4L/DVB (10651): uvcvideo: Ignore empty bulk URBsLaurent Pinchart1-0/+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>
2009-03-30V4L/DVB (10650): uvcvideo: Initialize streaming parameters with the probe ↵Laurent Pinchart1-4/+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>
2009-03-30V4L/DVB (10295): uvcvideo: Retry URB buffers allocation when the system is ↵Laurent Pinchart1-37/+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>
2009-01-29V4L/DVB (10199): uvcvideo: Fix GET_DEF failure detection.Laurent Pinchart1-1/+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>
2009-01-29V4L/DVB (10197): uvcvideo: Whitespace and comments cleanup, copyright updates.Laurent Pinchart1-10/+18
Signed-off-by: Laurent Pinchart <laurent.pinchart@skynet.be> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-23 20:42:34 +0000