- 05 Mar, 2014 38 commits
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Oleksij Rempel authored
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:
Oleksij Rempel <linux@rempel-privat.de> Signed-off-by:
Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by:
Mauro Carvalho Chehab <m.chehab@samsung.com>
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Sakari Ailus authored
Timestamp buffer flags are constant at the moment. Document them so that 1) they're always valid and 2) not changed by the drivers. This leaves room to extend the functionality later on if needed. Signed-off-by:
Sakari Ailus <sakari.ailus@iki.fi> Acked-by:
Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by:
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Sakari Ailus authored
Copy the flags containing the timestamp source from source buffer flags to the destination buffer flags on memory-to-memory devices. This is analogous to copying the timestamp field from source to destination. Signed-off-by:
Kamil Debski <k.debski@samsung.com> Signed-off-by:
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Sakari Ailus authored
The timestamp and timecode fields were copied from destination to source, not the other way around as they should. Fix it. Signed-off-by:
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Sakari Ailus authored
The UVC device provided timestamps are taken from the clock once the exposure of the frame has begun, not when the reception of the frame would have been finished as almost anywhere else. Show this to the user space by using V4L2_BUF_FLAG_TSTAMP_SRC_SOE buffer flag. Signed-off-by:
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Sakari Ailus authored
For COPY timestamps, buffer timestamp source flags will traverse the queue untouched. Signed-off-by:
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Sakari Ailus authored
Some devices do not produce timestamps that correspond to the end of the frame. The user space should be informed on the matter. This patch achieves that by adding buffer flags (and a mask) for timestamp sources since more possible timestamping points are expected than just two. A three-bit mask is defined (V4L2_BUF_FLAG_TSTAMP_SRC_MASK) and two of the eight possible values is are defined V4L2_BUF_FLAG_TSTAMP_SRC_EOF for end of frame (value zero) V4L2_BUF_FLAG_TSTAMP_SRC_SOE for start of exposure (next value). Signed-off-by:
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Sakari Ailus authored
Mask out other bits when comparing timestamp types. Signed-off-by:
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Sakari Ailus authored
The timestamp_type field used to contain only the timestamp type. Soon it will be used for timestamp source flags as well. Rename the field accordingly. [m.chehab@samsung.com: do the change also to drivers/staging/media and at s2255] Signed-off-by:
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Sakari Ailus authored
The buffer flags field is 32 bits but the defined only used 16. This is fine, but as more than 16 bits will be used in the very near future, define them as 32-bit numbers for consistency. Signed-off-by:
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Sakari Ailus authored
Document that monotonic timestamps are taken after the corresponding frame has been received, not when the reception has begun. This corresponds to the reality of current drivers: the timestamp is naturally taken when the hardware triggers an interrupt to tell the driver to handle the received frame. Remove the note on timestamp accuracy as it is fairly subjective what is actually an unstable timestamp. Also remove explanation that output buffer timestamps can be used to delay outputting a frame. Remove the footnote saying we always use realtime clock. Signed-off-by:
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Hans Verkuil authored
When sending a buffer to a video output device some of the fields need to be copied so they arrive in the driver. These are the KEY/P/BFRAME flags and the TIMECODE flag, and, if that flag is set, the timecode field itself. There are a number of functions involved in this: the __fill_vb2_buffer() is called while preparing a buffer. For output buffers the buffer contains the video data, so any meta data associated with that (KEY/P/BFRAME and the field information) should be stored at that point. The timecode, timecode flag and timestamp information is not part of that, that information will have to be set when vb2_internal_qbuf() is called to actually queue the buffer to the driver. Usually VIDIOC_QBUF will do the prepare as well, but you can call PREPARE_BUF first and only later VIDIOC_QBUF. You most likely will want to set the timestamp and timecode when you actually queue the buffer, not when you prepare it. Finally, in buf_prepare() make sure the timestamp and sequence fields are actually cleared so that when you do a QUERYBUF of a prepared-but-not-yet-queued buffer you will not see stale timestamp/sequence data. Signed-off-by:
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Antti Palosaari authored
Modern silicon RF tuners used nowadays has many controllable gain stages on signal path. Usually, but not always, there is at least 3 gain stages. Also on some cases there could be multiple gain stages within the ones specified here. However, I think that having these three controllable gain stages offers enough fine-tuning for real use cases. 1) LNA gain. That is first gain just after antenna input. 2) Mixer gain. It is located quite middle of the signal path, where RF signal is down-converted to IF/BB. 3) IF gain. That is last gain in order to adjust output signal level to optimal level for receiving party (usually demodulator ADC). Each gain stage could be set rather often both manual or automatic (AGC) mode. Due to that add separate controls for controlling operation mode. Signed-off-by:
Antti Palosaari <crope@iki.fi> Signed-off-by:
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Antti Palosaari authored
Add documentation for LNA, mixer and IF gain controls. These controls are RF tuner specific. Signed-off-by:
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Antti Palosaari authored
It is class for RF tuner specific controls, like gain controls, filters, signal strength. Cc: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by:
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Antti Palosaari authored
Delay possible I2C gate close a little bit in order to see if there is next message coming to tuner in a sequence. Also, export private muxed I2C adapter. That is aimed only for SDR extension module as SDR belongs to same RTL2832 physical I2C bus (it is physically property of RTL2832, whilst it is own kernel module). Signed-off-by:
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Luis Alves authored
Signed-off-by:
Luis Alves <ljalvs@gmail.com> Signed-off-by:
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Antti Palosaari authored
There was a deadlock between master I2C adapter and muxed I2C adapter. Implement two I2C muxed I2C adapters and leave master alone, just only for offering I2C adapter for these mux adapters. Reported-by:
Benjamin Larsson <benjamin@southpole.se> Signed-off-by:
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Antti Palosaari authored
RTL2832 provides gated / repeater I2C adapter for tuner. Implement it as a muxed I2C adapter. Signed-off-by:
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Antti Palosaari authored
Most of those were reported by checkpatch.pl... debug module parameter is not used anywhere so remove it. Signed-off-by:
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Antti Palosaari authored
All used tuners has get_if_frequency() callback and that parameter is not needed and will not needed as all upcoming tuner drivers should implement get_if_frequency(). Signed-off-by:
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Antti Palosaari authored
Disable IR interrupts in order to avoid SDR sample loss. IR interrupts causes some extra load for device and it seems be one reason to loss samples when sampling rate is high. Signed-off-by:
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Antti Palosaari authored
There is now new tuner types which are not handled on that switch-case. Print error if unknown tuner type is meet. drivers/media/tuners/tuner-xc2028.c: In function ‘generic_set_freq’: drivers/media/tuners/tuner-xc2028.c:1037:2: warning: enumeration value ‘V4L2_TUNER_ADC’ not handled in switch [-Wswitch] switch (new_type) { ^ drivers/media/tuners/tuner-xc2028.c:1037:2: warning: enumeration value ‘V4L2_TUNER_RF’ not handled in switch [-Wswitch] Cc: Mauro Carvalho Chehab <m.chehab@samsung.com> Signed-off-by: -
Mauro Carvalho Chehab authored
Some previous patch introduced this bug: /devel/v4l/patchwork/Documentation/DocBook/controls.xml:2262: parser error : attributes construct error <row id=""v4l2-mpeg-video-hor-search-range"> ^ /devel/v4l/patchwork/Documentation/DocBook/controls.xml:2262: parser error : Couldn't find end of Start Tag row line 2262 <row id=""v4l2-mpeg-video-hor-search-range"> ^ Signed-off-by: -
Mauro Carvalho Chehab authored
Add SDR to V3.15 revlist, and add the credits to Antti. Signed-off-by: -
Antti Palosaari authored
Add SDR device type to v4l2-framework.txt document. Cc: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by:
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Antti Palosaari authored
Let it be experimental still as all SDR drivers are in staging. Cc: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by:
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Antti Palosaari authored
Document V4L2 SDR interface. Cc: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by:
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Antti Palosaari authored
Update documentation to reflect 1 Hz frequency step flag. Cc: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by:
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Hans Verkuil authored
Modulator ioctls could be enabled mistakenly for non-radio devices. Currently those ioctls are only valid for radio. Fix it. Signed-off-by:
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Antti Palosaari authored
VIDIOC_QUERYCAP IOCTL is used to query device capabilities. Add new capability flag to inform given device supports SDR capture. Signed-off-by:
Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by:
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Antti Palosaari authored
Enable stream format (FMT) IOCTLs for SDR use. These are used for negotiate used data stream format. Reorganise some some IOCTL selection logic. Signed-off-by:
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Antti Palosaari authored
Use own format ops for SDR data: vidioc_enum_fmt_sdr_cap vidioc_g_fmt_sdr_cap vidioc_s_fmt_sdr_cap vidioc_try_fmt_sdr_cap Signed-off-by:
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Antti Palosaari authored
Add new V4L2 stream format definition, V4L2_BUF_TYPE_SDR_CAPTURE, for SDR receiver. Signed-off-by:
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Antti Palosaari authored
Add V4L2_TUNER_CAP_1HZ for 1 Hz resolution. Signed-off-by:
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Antti Palosaari authored
Define tuner types V4L2_TUNER_ADC and V4L2_TUNER_RF for SDR usage. ADC is used for setting sampling rate (sampling frequency) to SDR device. Another tuner type, named as V4L2_TUNER_RF, is possible RF tuner. Is is used to down-convert RF frequency to range ADC could sample. Having RF tuner is optional, whilst in practice it is almost always there. Also add checks to VIDIOC_G_FREQUENCY, VIDIOC_S_FREQUENCY and VIDIOC_ENUM_FREQ_BANDS only allow these two tuner types when device type is SDR (VFL_TYPE_SDR). For VIDIOC_G_FREQUENCY we do not check tuner type, instead override type with V4L2_TUNER_ADC in every case (requested by Hans in order to keep functionality in line with existing tuners and existing API does not specify it). Prohibit VIDIOC_S_HW_FREQ_SEEK explicitly when device type is SDR, as device cannot do hardware seek without a hardware demodulator. Signed-off-by:
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Antti Palosaari authored
Add new V4L device type VFL_TYPE_SDR for Software Defined Radio. It is registered as /dev/swradio0 (/dev/sdr0 was already reserved). Signed-off-by:
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Antti Palosaari authored
Add new video4linux device named /dev/swradio for Software Defined Radio use. V4L device minor numbers are allocated dynamically nowadays, but there is still configuration option for old fixed style. Add note to mention that configuration option too. Signed-off-by:
Alan Cox <alan@linux.intel.com> Acked-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by:
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- 04 Mar, 2014 2 commits
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Mauro Carvalho Chehab authored
This device has a led at bit 7 of GPIO reg. 0x80 to indicate when a DVB capture is happening. Add support for it. Signed-off-by: -
Mauro Carvalho Chehab authored
Some devices have a LED to indicate when DVB capture started. Add support for it. Signed-off-by:
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