If the NULL test is necessary, then the dereference should be moved below
the NULL test.
The semantic patch that makes this change is as follows:
(http://www.emn.fr/x-info/coccinelle/)
// <smpl>
@@
type T;
expression E;
identifier i,fld;
statement S;
@@
- T i = E->fld;
+ T i;
... when != E
when != i
if (E == NULL) S
+ i = E->fld;
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
It is not clear how to share the unlock in the case where the structure
containing the lock has to be freed. So the unlock is now duplicated, with
one copy moved before the free. The unlock label furthermore is no longer
useful and is thus deleted.
A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)
// <smpl>
@@
expression x,e;
identifier f;
iterator I;
statement S;
@@
*kfree(x);
... when != &x
when != x = e
when != I(x,...) S
*x->f
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
video_nr is unsigned so the test did not work.
Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Although these sizes may be the same it is better to calculate the size of
the source, than the destiny.
Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Make the VBI support work for PAL standards in addition to NTSC.
This work was sponsored by EyeMagnet Limited.
Thanks go out to Andy Walls for providing a CD containing test PAL/VBI captures
and to Steven Toth for providing a PVR-350 to do signal generation with.
Signed-off-by: Devin Heitmueller <dheitmueller@kernellabs.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
When firmware 1.20 was introduced, the dib0700 switched from a polling model
using a USB control message, to the messages being delivered on a USB bulk
pipe. The code I originally added would do a blocking read on the pipe with a
50ms timeout. Because the dvb-usb-remote code makes use of the global
workqueue, this resulted in the global workqueue being blocked 50% of the
time. Also, the synchronous urb_bulk_msg() call would burn excess CPU time
(reflected as an abnormal increase in the system's load average when devices
were connected).
Rework the logic so that we now setup an asynchronous callback on the bulk
pipe, so that we now only handle RC data when it arrives on the pipe. Note
that we provide a stub function for the RC polling callback so that we can
continue to leverage the shared code in dvb-usb-rc for the setting up of the
input device.
Signed-off-by: Devin Heitmueller <dheitmueller@kernellabs.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
The bug was introduced when adding the sensor adcm1700.
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
When loading the register 0x49 of the page 3, the usb_control_msg() sometimes
fails with error -71 or -62.
This change skips loading the register 0x48.
Tested-by: Márton Németh <nm127@freemail.hu>
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Some webcams have many interfaces with the same interface class, so the
previous interface check did not work.
The new code checks if the interface number is zero or the only one.
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
The new names tell the image resolution: 'Scale' is the smaller image.
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This change fixes up saa7127_s_std() generate SECAM out, if the user has
requested a 50 Hz video standard set that only contains a request for SECAM
standards and not PAL. Only the SAA712[89] chips can generate SECAM, the
SAA712[67] chips cannot.
I was unclear on the burst start and end values - I couldn't figure out
the units - so I left them the same as for the PAL systems.
A the video decoders on both a PVR-350 (SAA7115) and an HVR-1600 (CX23418)
identify the SECAM signal generated by a SAA7129 with this patch as SECAM.
Signed-off-by: Andy Walls <awalls@radix.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Fix the "xceive_pin" setting from "15" to "1" for the PVR2100 -- the same as
the PVR3100H. This properly resets the XC2028 tuner on the PVR2100.
Sergey's original email report:
Hi.
Seems cx18 module has incorrect .xceive_pin value for card,
as i see lots of i2c errors in dmesg from xc2028.
i'm using 2.6.32.2, my hardware is:
00:09.0 Multimedia video controller [0400]: Conexant Systems, Inc. CX23418
Single-Chip MPEG-2 Encoder with Integrated Analog Video/Broadcast Audio Decoder
[14f1:5b7a]
Subsystem: LeadTek Research Inc. Device [107d:6f27]
Flags: bus master, medium devsel, latency 64, IRQ 17
Memory at f0000000 (32-bit, non-prefetchable) [size=64M]
Capabilities: [44] Vital Product Data
Capabilities: [4c] Power Management version 2
Kernel driver in use: cx18
Kernel modules: cx18
Following fixes this problem for me, the rest seems working:
Reported-by: Sergey Bolshakov <sbolshakov@altlinux.ru>
Tested-by: Sergey Bolshakov <sbolshakov@altlinux.ru>
Signed-off-by: Andy Walls <awalls@radix.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
The CX18_CPU_SET_INDEXTABLE command was being called with the wrong number
of arguments causing the index table frame type selection mask to be set wrong.
Now the IDX stream properly sends entries for I, P, and B frames.
Signed-off-by: Andy Walls <awalls@radix.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
VIDIOC_G_ENC_INDEX support see the light of day.
Some notes:
1. With default capture parameters, the CX23418 seems to transfer 192 index
entries (4.5 kB worth) at 10 second intervals.
2. Index streams don't seem to be supported for MPEG 2 TS streams
3. The index entries seem to claim every frame is a B-Frame. Possible
firmware bug.
4. The cx18 driver does not try to capture an index stream when inserting
sliced VBI into the MPEg stream as the offsets would need fixup.
Signed-off-by: Andy Walls <awalls@radix.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
According to the v4l2 spec, very old MPEG index entries needs to be discarded
in favor of newer index entries. This change ensures the firmware always has
buffers for index entries at the expense of the oldest unread buffers.
Signed-off-by: Andy Walls <awalls@radix.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This change starts the IDX stream along with the MPG stream as an internal
use (only) stream much like the VBI stream can be started as an internal use
stream for inserting sliced VBI packets.
The IDX stream is not started automatically with an MPEG strem if the IDX
stream is disabled (no buffers allocated) or if sliced VBI insertion is being
performed by the cx18 driver. The cx18 driver doing sliced VBI insertion
makes the offsets in the IDX stream inaccurate for the final MPEG stream
presented to user space. Since fixing the IDX offsets ourselves is not easy
and we cannot easily do what ivtv does to fix the offsets, we'll make sliced
VBI insertion and MPEG Index capture mutually exclusive for now.
Signed-off-by: Andy Walls <awalls@radix.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This change allows the IDX stream to be started and stopped as any other
stream even though it has no associated device node. This is needed for
cx18 driver internal use.
Also always tell the CX23418 to generate index entries when an analog capture
starts and the IDX stream has had buffers allocated (i.e. is enabled).
Signed-off-by: Andy Walls <awalls@radix.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Fix a long standing memory leak of stream buffers for streams that did not
have a struct video_device allocated: namely the TS and IDX streams.
Signed-off-by: Andy Walls <awalls@radix.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Update the module options related to INDEX stream buffer allocation. A single
CX2341[5678] index entry is only 24 bytes. Large buffers for the IDX stream
will prevent the CX23418 from transferring index data over at all. Buffers
of around 1.5 kB or 64 index entries seem to be just fine. We'll default to
63 buffers/MDLs as that is the firmware limit per stream and IDX stream buffers
are not high rate. There is no reason on earth to allocate the previous 1 MB
default of buffer space for the IDX stream.
This is in anticipation of implementing the G_ENC_INDEX ioctl() in the cx18
driver.
Signed-off-by: Andy Walls <awalls@radix.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
The ctrls field of struct sd_desc is declared as const
in gspca.h. It is worth to initialize the content also with
constant values.
Signed-off-by: Marton Nemeth <nm127@freemail.hu>
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
The function callbacks in sd_desc are defined at compile time and
they do not change at runtime. Make the sd_desc initializations const.
Signed-off-by: Márton Németh <nm127@freemail.hu>
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
The USB video interface was checked as having the number zero, but
some webcams have other values. The test is now done on the interface
class which may be either 255 (vendor spec) or 0 (class per interface).
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
- adapt the start sequences from the info file of the ms-win driver
of the webcams 046d:08a2/046d:08aa (lvWIMv.inf)
- disable the brightness for this sensor
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
- have 2 tables for sensor probe
- with the same ID, the sensor mi1320 is found with the bridge vc0321,
the sensor mi1320_soc with the bridge vc0323
- add some comments
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Added a new initialization method for Aiptek DV T300.
Addresses http://bugzilla.kernel.org/show_bug.cgi?id=13708
Tested-by: Hámorszky Balázs <balihb@gmail.com>
Signed-off-by: Antoine Jacquet <royale@zerezo.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Currently all probed sensor types are emitted in the kernel log, generating unnecessary noise. Be less verbose and only report what sensor is found (if any)
Signed-off-by: Erik Andrén <erik.andren@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
The webcam 0ac8:303b may have the sensors HV7131B or HV7131R(c).
This changeset checks the HV7131 type.
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This ID was found in a webcam 0ac8:301b.
Signed-off-by: Luis Maia <lmaia@royalhat.org>
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This flag permits subdrivers to create specific transfer URBs.
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
