- 08 Mar, 2012 36 commits
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Gianluca Gennari authored
On MIPS/ARM set-top-boxes, as well as old x86 PCs, memory allocation failures in the em28xx driver are common, due to memory fragmentation over time, that makes impossible to allocate large chunks of coherent memory. A typical system with 256/512 MB of RAM fails after just 1 day of uptime (see the old thread for detailed reports and crashlogs). In fact, the em28xx driver allocates memory for USB isoc transfers at runtime, as opposite to the dvb-usb drivers that allocates the USB buffers when the device is initialized, and frees them when the device is disconnected. Moreover, in digital mode the USB isoc transfer buffers are freed, allocated and cleared every time the user selects a new channel, wasting time and resources. This patch solves both problems by allocating DVB isoc transfer buffers in em28xx_usb_probe(), and freeing them in em28xx_usb_disconnect(). In fact, the buffers size and number depend only on the max USB packet size that is parsed from the USB descriptors in em28xx_usb_probe(), so it can never change for a given device. This approach makes no sense in analog mode (as the buffer size depends on the alternate mode selected at runtime), the patch creates two separate sets of buffers for digital and analog modes. For digital-only devices, USB buffers are created when the device is probed and freed when the device is disconnected. For analog-only devices, nothing changes: isoc buffers are created at runtime. For hybrid devices, two sets of buffers are maintained: the digital-mode buffers are created when the device is probed, and freed when the device is disconnected; analog-mode buffers are created/destroyed at runtime as before. So, in analog mode, digital and analog buffers coexists at the same time: this can be justified by the fact that digital mode is by far more commonly used nowadays, so it makes sense to optimize the driver for this use case scenario. The patch has been tested in the last few days on a x86 PC and a MIPS set-top-box, with the PCTV 290e (digital only) and the Terratec Hybrid XS (hybrid device). With the latter, I switched several times between analog and digital mode (Kaffeine/TvTime) with no issue at all. I unplugged/plugged the devices several times with no problem. Also, after over 3 days of normal usage in the MPIS set-top-box, the PCTV 290e was still up and running. Signed-off-by:
Gianluca Gennari <gennarone@gmail.com> Signed-off-by:
Mauro Carvalho Chehab <mchehab@redhat.com>
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Alexey Khoroshilov authored
If go7007_usb_vendor_request() fails in write_reg_fp() or in read_reg_fp(), the usb->i2c_lock mutex left locked. The patch moves mutex_unlock(&usb->i2c_lock) before check for go7007_usb_vendor_request() returned value. Found by Linux Driver Verification project (linuxtesting.org). Signed-off-by:
Alexey Khoroshilov <khoroshilov@ispras.ru> Signed-off-by:
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Jean Delvare authored
The signal strength value returned is not quite correct, it decreases when I increase the gain of my antenna, and vice versa. It also doesn't span over the whole 0x0000-0xffff range. Compute a value which at least increases when signal strength increases, and spans the whole allowed range. In practice I get 67% with my antenna fully amplified and 51% with no amplification. This is close enough to what I get on my other DVB-T adapter with the same antenna. Signed-off-by:
Jean Delvare <khali@linux-fr.org> Cc: Steven Toth <stoth@kernellabs.com> Signed-off-by:
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Malcolm Priestley authored
Read signal strength using VAR_P_INBAND and apply FEC preferred values. Note this does not work on IT9137 devices even with dvb-usb-it9135-01.fw firmware. Config read_sl allows switch between read signal strength and signal level. Signed-off-by:
Malcolm Priestley <tvboxspy@gmail.com> Signed-off-by:
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Malcolm Priestley authored
Allow PID 8192 to turn PID filter off in USB high speed. The PID number is still written to the PID index and will only turn on again if that index is set to 0. Signed-off-by:
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Malcolm Priestley authored
Some virtual I2C commands are missed along some PID filtering commands resulting complete stall of driver. Since dvb-usb cannot handle the -EAGAIN error and commands generally should not be missed mutex_lock is used instead. Signed-off-by:
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Axel Lin authored
This patch converts the drivers in drivers/media/* to use the module_i2_driver() macro which makes the code smaller and a bit simpler. Signed-off-by:
Axel Lin <axel.lin@gmail.com> Cc: Kyungmin Park <kyungmin.park@samsung.com> Cc: Heungjun Kim <riverful.kim@samsung.com> Cc: Joonyoung Shim <jy0922.shim@samsung.com> Cc: Andrew Chew <achew@nvidia.com> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Michael Grzeschik <m.grzeschik@pengutronix.de> Cc: Johannes Obermaier <johannes.obermaier@gmail.com> Cc: Steven Toth <stoth@kernellabs.com> Acked-by:
Laurent Pinchart <laurent.pinchart@ideasonboard.com> Acked-by:
Sylwester Nawrocki <s.nawrocki@samsung.com> Acked-by:
Tomasz Stanislawski <t.stanislaws@samsung.com> Acked-by:
Hans Verkuil <hans.verkuil@cisco.com> Acked-by:
Guennadi Liakhovetski <g.liakhovetski@gmx.de> Acked-by:
Jonathan Corbet <corbet@lwn.net> Signed-off-by:
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Jean-François Moine authored
The exposure was not set when autogain was set. Signed-off-by:
Jean-François Moine <moinejf@free.fr> Signed-off-by:
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Jean-François Moine authored
The setexposure added in commit 590f2168 works only for the sensor hv7131r, but it is called for all sensors when changing the autogain. Signed-off-by:
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Jean-François Moine authored
- copyright change - use the kbuild module name for messages - remove useless comments Signed-off-by:
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Jean-François Moine authored
The low level traces are better done by usbmon. Signed-off-by:
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Jean-François Moine authored
The bridge register 11 reports the current transfer status. This value is used to know about a possible overflow and to adjust the transfer parameters (registers 07 and 08). Signed-off-by:
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Jean-François Moine authored
As the bridge register 08 defines the JPEG compression quality, it must be changed on JPEG quality change and also, the decompression tables must be adjusted when the register varies. [mchehab@redhat.com: replace a // comment by a /* */ one] Signed-off-by:
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Jean-François Moine authored
The auto gain uses the knee algorithm. Adding the setexposure control function forced to: - rename of the previous function setexposure - add a specific auto setting function Signed-off-by:
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Jean-François Moine authored
The get_jcomp control is rarely used and its main information, the JPEG quality, may be found in the images. Signed-off-by:
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Jean-François Moine authored
The autogain was always active. Signed-off-by:
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Jean-François Moine authored
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Jean-François Moine authored
The JPEG header is always the same, so, it does not need to be rebuild each time a new frame is received. Signed-off-by:
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Jean-François Moine authored
- copyright change - use the kbuild module name for messages - change module author - remove '__' from the variable types - use u8 instead of 'unsigned char' - simplify the error messages - remove useless initialization - remove useless traces Signed-off-by:
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Jean-François Moine authored
Signed-off-by:
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Sylwester Nawrocki authored
Initialize the subdev name properly so it doesn't have an I2C bus and slave address appended to it. Signed-off-by:
Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by:
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Sylwester Nawrocki authored
Initialize the subdev name properly so it doesn't have an I2C bus and slave address appended to it. Signed-off-by:
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Sylwester Nawrocki authored
Initialize the subdev name properly so it doesn't have an I2C bus and slave address appended to it. Signed-off-by:
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Andrzej Pietrasiewicz authored
Adapt to new controls (subsampling). For encoding, the destination format now needs to be set to V4L2_PIX_FMT_JPEG and the subsampling (4:2:2 or 4:2:0) needs to be set using the respective control (V4L2_CID_JPEG_CHROMA_SUBSAMPLING). Required buffer size for destination image during encoding is no longer deduced from the format (which generally implied overestimation), but needs to be given from userspace in sizeimage. Not strictly related to the added controls, this patch also fixes setting the subsampling of the destination image for decoding, depending on the destination format. Signed-off-by:
Andrzej Pietrasiewicz <andrzej.p@samsung.com> Signed-off-by:
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Kamil Debski authored
Signed-off-by:
Kamil Debski <k.debski@samsung.com> Signed-off-by:
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Sachin Kamat authored
Add support for flipping the image horizontally and vertically. Signed-off-by:
Sachin Kamat <sachin.kamat@linaro.org> Acked-by:
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Kamil Debski authored
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Kamil Debski authored
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Javier Martin authored
Some video devices need to use contiguous memory which is not backed by pages as it happens with vmalloc. This patch provides USERPTR handling for those devices. Signed-off-by:
Javier Martin <javier.martin@vista-silicon.com> Signed-off-by:
Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by:
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Sylwester Nawrocki authored
The devm_* functions are used in the platform device probe() for data that is freed on driver removal. The managed device layer takes care of undoing actions taken in the probe callback() and freeing resources on driver detach. This eliminates the need for manually releasing resources and simplifies error handling. Signed-off-by:
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Sylwester Nawrocki authored
Add support for cropping and composition setup on the video capture node through VIDIOC_S/G_SELECTION ioctls. S/G_CROP, CROPCAP ioctls are still supported for applications since the core will translate them to *_selection handler calls. Signed-off-by:
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Sylwester Nawrocki authored
Add VIDIOC_PREPARE_BUF and VIDIOC_CREATE_BUFS ioctl handlers to enable support for multi-size buffer queue. Signed-off-by:
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Sylwester Nawrocki authored
The devm_* functions are used in the platform device probe() for data that is freed on driver removal. The managed device layer takes care of undoing actions taken in the probe callback() and freeing resources on driver detach. This eliminates the need for manually releasing resources and simplifies error handling. Signed-off-by:
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Sylwester Nawrocki authored
The driver used the regulator API so it should depend on REGULATOR. [mchehab@redhat.com: break depends on on two lines, instead of using a \] Signed-off-by:
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Sylwester Nawrocki authored
Signed-off-by:
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Gianluca Gennari authored
Il 29/02/2012 22:30, Geert Uytterhoeven ha scritto: > http://kisskb.ellerman.id.au/kisskb/buildresult/5759200/ ERROR: > "__udivdi3" [drivers/media/dvb/frontends/rtl2830.ko] undefined! > The following patch fixed the warning on my 32 bit system. Signed-off-by:
Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by:
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- 01 Mar, 2012 3 commits
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Sylwester Nawrocki authored
Add short documentation providing the driver usage details. Signed-off-by:
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Sylwester Nawrocki authored
This patch replaces VIDIOC_S/G_JPEGCOMP ioctl handlers with V4L2_CID_JPEG_QUALITY control. Additionally it enables JPEG subsampling and the restart interval configuration through V4L2_CID_JPEG_SUBSAMPLING and V4L2_CID_JPEG_RESTART_INTERVAL controls. For the decoder video node only V4L2_CID_JPEG_SUBSAMPLING is available as a read-only control. Signed-off-by:
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Sylwester Nawrocki authored
This patch is a prerequisite for per file handle control handlers. Signed-off-by:
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- 28 Feb, 2012 1 commit
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Sylwester Nawrocki authored
Add DocBook entries for the JPEG control class. Signed-off-by:
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