| Commit message (Collapse) | Author | Age | Files | Lines |
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git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media
Pull media updates from Mauro Carvalho Chehab:
- a new jpeg codec driver for Samsung Exynos (jpeg-hw-exynos4)
- a new dvb frontend for ds2103 chipset (m88ds2103)
- a new sensor driver for Samsung S5K5BAF UXGA (s5k5baf)
- new drivers for R-Car VSP1
- a new radio driver: radio-raremono
- a new tuner driver for ts2022 chipset (m88ts2022)
- the analog part of em28xx is now a separate module that only
load/runs if the device is not a pure digital TV device
- added a staging driver for bcm2048 radio devices
- the omap 2 video driver (omap24xx) was moved to staging. This driver
is for an old hardware and uses a deprecated Kernel internal API. If
nobody cares enough to fix it, it would be removed on a couple Kernel
releases
- the sn9c102 driver was moved to staging. This driver was replaced by
gspca, and disabled on some distros, as almost all devices are known
to work properly with gspca. It should be removed from kernel on a
couple Kernel releases
- lots of driver fixes, improvements and cleanups
* 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (421 commits)
[media] media: v4l2-dev: fix video device index assignment
[media] rc-core: reuse device numbers
[media] em28xx-cards: properly initialize the device bitmap
[media] Staging: media: Fix line length exceeding 80 characters in as102_drv.c
[media] Staging: media: Fix line length exceeding 80 characters in as102_fe.c
[media] Staging: media: Fix quoted string split across line in as102_fe.c
[media] media: st-rc: Add reset support
[media] m2m-deinterlace: fix allocated struct type
[media] radio-usb-si4713: fix sparse non static symbol warnings
[media] em28xx-audio: remove needless check before usb_free_coherent()
[media] au0828: Fix sparse non static symbol warning
Revert "[media] go7007-usb: only use go->dev after allocated"
[media] em28xx-audio: provide an error code when URB submit fails
[media] em28xx: fix check for audio only usb interfaces when changing the usb alternate setting
[media] em28xx: fix usb alternate setting for analog and digital video endpoints > 0
[media] em28xx: make 'em28xx_ctrl_ops' static
em28xx-alsa: Fix error patch for init/fini
[media] em28xx-audio: flush work at .fini
[media] drxk: remove the option to load firmware asynchronously
[media] em28xx: adjust period size at runtime
...
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The side effect of commit 1056e4388b045 ("v4l2-dev: Fix race condition on
__video_register_device") is the increased number of index value assigned
on video_device registration. Before that commit video_devices were
numbered from 0, after it, the indexes starts from 1, because get_index()
always count the device, which is being registered. Some device drivers
rely on video_device index number for internal purposes, i.e. s5p-mfc
driver stopped working after that patch. This patch restores the old method
of numbering the video_device indexes.
Cc: stable@vger.kernel.org # for v3.12
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Acked-by: Ricardo Ribalda <ricardo.ribalda@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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Before changeset d8b4b5822f51e, the remote controller device numbers
were released when the device were unregistered. That helped to maintain
some sanity, as, when USB devices are replugged, the remote controller
would get the same number.
Restore the same behaviour.
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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Instead of just creating a long int, use DECLARE_BITMAP().
No functional changes.
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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Some of the SOCs hold the IRB IP in softreset state by default.
For this IP to work driver needs to bring it out of softreset.
This patch adds support to reset the IP via reset framework.
Without this patch the driver can not work with SoCs which holds the IP
in softreset.
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@st.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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'xt' points to a dma_interleaved_template and not a dma_async_tx_descriptor.
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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Fixes the following sparse warnings:
drivers/media/radio/si4713/radio-usb-si4713.c:226:31: warning:
symbol 'start_seq' was not declared. Should it be static?
drivers/media/radio/si4713/radio-usb-si4713.c:291:29: warning:
symbol 'command_table' was not declared. Should it be static?
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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usb_free_coherent() is safe with NULL addr and this check is
not required.
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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Fixes the following sparse warning:
drivers/media/usb/au0828/au0828-dvb.c:36:5: warning:
symbol 'preallocate_big_buffers' was not declared. Should it be static?
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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Instead of just saying:
[ 1646.412419] em2882/3 #0: submit of audio urb failed
Print the reason why it failed, to help debugging and fixing it.
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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usb alternate setting
Previously, we've been assuming that the video endpoints are always at usb
interface 0. Hence, if vendor audio endpoints are provided at a separate
interface, they were supposed to be at interface number > 0.
Instead of checking for (interface number > 0) to determine if an interface
is a pure audio interface, dev->is_audio_only should be checked.
Signed-off-by: Frank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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endpoints > 0
The current code assumes that the analog + digital video endpoints are always at
interface number 0 when changing the alternate setting.
This seems to work fine for most existing devices.
However, at least the SpeedLink VAD Laplace webcam has the video endpoint on
interface number 3 (which fortunately doesn't cause any trouble because ist uses
bulk transfers only).
We already consider the actual interface number for audio endpoints, so
rename the the audio_ifnum variable and use it for all device types.
Also get get rid of a pointless (ifnum < 0) in em28xx-audio.
Signed-off-by: Frank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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sparse warnings: (new ones prefixed by >>)
>> drivers/media/usb/em28xx/em28xx-video.c:1151:28: sparse: symbol 'em28xx_ctrl_ops' was not declared. Should it be static?
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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If something bad happens during init, we free the card data.
However, we still keep it initialized, causing some dependent
code to be called at .fini.
Fix it.
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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As a pending action might be still there at the work
thread, flush it.
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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The option to load firmware asynchronously were added due to
a requirement with a few versions of udev. It turns that this was
a bad idea and caused regressions on drxk-based devices.
So, we end by only letting the firmware to be loaded syncronously
everywhere.
So, let's remove the bad code.
This patch partially reverts the changeset 8e30783b0b3.
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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While the current hardcoded period is ok for the current values,
we may latter change the driver to work with different bit rates
or with different latencies than 64ms.
So, adust the period size at runtime.
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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Avoid circular mutex lock by pushing the dev->lock to the .fini
callback on each extension.
As em28xx-dvb, em28xx-alsa and em28xx-rc have their own data
structures, and don't touch at the common structure during .fini,
only em28xx-v4l needs to be locked.
[ 90.994317] ======================================================
[ 90.994356] [ INFO: possible circular locking dependency detected ]
[ 90.994395] 3.13.0-rc1+ #24 Not tainted
[ 90.994427] -------------------------------------------------------
[ 90.994458] khubd/54 is trying to acquire lock:
[ 90.994490] (&card->controls_rwsem){++++.+}, at: [<ffffffffa0177b08>] snd_ctl_dev_free+0x28/0x60 [snd]
[ 90.994656]
[ 90.994656] but task is already holding lock:
[ 90.994688] (&dev->lock){+.+.+.}, at: [<ffffffffa040db81>] em28xx_close_extension+0x31/0x90 [em28xx]
[ 90.994843]
[ 90.994843] which lock already depends on the new lock.
[ 90.994843]
[ 90.994874]
[ 90.994874] the existing dependency chain (in reverse order) is:
[ 90.994905]
-> #1 (&dev->lock){+.+.+.}:
[ 90.995057] [<ffffffff810b8fa3>] __lock_acquire+0xb43/0x1330
[ 90.995121] [<ffffffff810b9f82>] lock_acquire+0xa2/0x120
[ 90.995182] [<ffffffff816a5b6c>] mutex_lock_nested+0x5c/0x3c0
[ 90.995245] [<ffffffffa0422cca>] em28xx_vol_put_mute+0x1ba/0x1d0 [em28xx_alsa]
[ 90.995309] [<ffffffffa017813d>] snd_ctl_elem_write+0xfd/0x140 [snd]
[ 90.995376] [<ffffffffa01791c2>] snd_ctl_ioctl+0xe2/0x810 [snd]
[ 90.995442] [<ffffffff811db8b0>] do_vfs_ioctl+0x300/0x520
[ 90.995504] [<ffffffff811dbb51>] SyS_ioctl+0x81/0xa0
[ 90.995568] [<ffffffff816b1929>] system_call_fastpath+0x16/0x1b
[ 90.995630]
-> #0 (&card->controls_rwsem){++++.+}:
[ 90.995780] [<ffffffff810b7a47>] check_prevs_add+0x947/0x950
[ 90.995841] [<ffffffff810b8fa3>] __lock_acquire+0xb43/0x1330
[ 90.995901] [<ffffffff810b9f82>] lock_acquire+0xa2/0x120
[ 90.995962] [<ffffffff816a762b>] down_write+0x3b/0xa0
[ 90.996022] [<ffffffffa0177b08>] snd_ctl_dev_free+0x28/0x60 [snd]
[ 90.996088] [<ffffffffa017a255>] snd_device_free+0x65/0x140 [snd]
[ 90.996154] [<ffffffffa017a751>] snd_device_free_all+0x61/0xa0 [snd]
[ 90.996219] [<ffffffffa0173af4>] snd_card_do_free+0x14/0x130 [snd]
[ 90.996283] [<ffffffffa0173f14>] snd_card_free+0x84/0x90 [snd]
[ 90.996349] [<ffffffffa0423397>] em28xx_audio_fini+0x97/0xb0 [em28xx_alsa]
[ 90.996411] [<ffffffffa040dba6>] em28xx_close_extension+0x56/0x90 [em28xx]
[ 90.996475] [<ffffffffa040f639>] em28xx_usb_disconnect+0x79/0x90 [em28xx]
[ 90.996539] [<ffffffff814a06e7>] usb_unbind_interface+0x67/0x1d0
[ 90.996620] [<ffffffff8142920f>] __device_release_driver+0x7f/0xf0
[ 90.996682] [<ffffffff814292a5>] device_release_driver+0x25/0x40
[ 90.996742] [<ffffffff81428b0c>] bus_remove_device+0x11c/0x1a0
[ 90.996801] [<ffffffff81425536>] device_del+0x136/0x1d0
[ 90.996863] [<ffffffff8149e0c0>] usb_disable_device+0xb0/0x290
[ 90.996923] [<ffffffff814930c5>] usb_disconnect+0xb5/0x1d0
[ 90.996984] [<ffffffff81495ab6>] hub_port_connect_change+0xd6/0xad0
[ 90.997044] [<ffffffff814967c3>] hub_events+0x313/0x9b0
[ 90.997105] [<ffffffff81496e95>] hub_thread+0x35/0x170
[ 90.997165] [<ffffffff8108ea2f>] kthread+0xff/0x120
[ 90.997226] [<ffffffff816b187c>] ret_from_fork+0x7c/0xb0
[ 90.997287]
[ 90.997287] other info that might help us debug this:
[ 90.997287]
[ 90.997318] Possible unsafe locking scenario:
[ 90.997318]
[ 90.997348] CPU0 CPU1
[ 90.997378] ---- ----
[ 90.997408] lock(&dev->lock);
[ 90.997497] lock(&card->controls_rwsem);
[ 90.997607] lock(&dev->lock);
[ 90.997697] lock(&card->controls_rwsem);
[ 90.997786]
[ 90.997786] *** DEADLOCK ***
[ 90.997786]
[ 90.997817] 5 locks held by khubd/54:
[ 90.997847] #0: (&__lockdep_no_validate__){......}, at: [<ffffffff81496564>] hub_events+0xb4/0x9b0
[ 90.998025] #1: (&__lockdep_no_validate__){......}, at: [<ffffffff81493076>] usb_disconnect+0x66/0x1d0
[ 90.998204] #2: (&__lockdep_no_validate__){......}, at: [<ffffffff8142929d>] device_release_driver+0x1d/0x40
[ 90.998383] #3: (em28xx_devlist_mutex){+.+.+.}, at: [<ffffffffa040db77>] em28xx_close_extension+0x27/0x90 [em28xx]
[ 90.998567] #4: (&dev->lock){+.+.+.}, at: [<ffffffffa040db81>] em28xx_close_extension+0x31/0x90 [em28xx]
Reviewed-by: Frank Schäfer <fschaefer.oss@googlemail.com>
Tested-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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Now that everything is extension, the usb disconnect logic should
be the same.
While here, fix the device name.
Reviewed-by: Frank Schäfer <fschaefer.oss@googlemail.com>
Tested-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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That helps to identify if something fails and explain why em28xx
struct is not freed (if it ever happens).
Reviewed-by: Frank Schäfer <fschaefer.oss@googlemail.com>
Tested-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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URBs might be in usage. Disconnect the device before freeing
them.
Reviewed-by: Frank Schäfer <fschaefer.oss@googlemail.com>
Tested-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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Cleanup the error handling code at em28xx-audio init.
Reviewed-by: Frank Schäfer <fschaefer.oss@googlemail.com>
Tested-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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Alsa has an special non-negative return code to indicate device removal
at snd_em28xx_capture_pointer(). Use it, instead of an error code.
Reviewed-by: Frank Schäfer <fschaefer.oss@googlemail.com>
Tested-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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Remove some dead code from em28xx_v4l2_fini() and fix the leaking of the video,
vbi and radio video_device struct memories.
Signed-off-by: Frank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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handler
When the usb device is disconnected, the resources are no longer available,
so there is no reason to keep them registered.
This will also fix the various sysfs group removal warnings which we can see
since kernel 3.13.
Signed-off-by: Frank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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unregistration to em28xx_v4l2_fini
v4l2_ctrl_handler_free() and v4l2_device_unregister() are currently only called
when the last user closes the device and the device is already disconnected.
But that's wrong, we need to call these functions whenever the em28xx-v4l
extension is closed and we can already do this if the device is still opened
by some users.
Signed-off-by: Frank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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v4l extension
Signed-off-by: Frank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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extension
Signed-off-by: Frank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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to the v4l-extension
Signed-off-by: Frank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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core to the dvb extension
Signed-off-by: Frank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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radio and VBI mode
- bail out on unsupported VFL_TYPE
- em28xx_set_mode() needs to be called for VBI and radio mode, too
- em28xx_wake_i2c() needs to be called for VBI and radio mode, too
- em28xx_resolution_set() also needs to be called for VBI
Signed-off-by: Frank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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In file included from /devel/v4l/temp/include/asm-generic/page.h:23:0,
from /devel/v4l/temp/arch/c6x/include/asm/page.h:9,
from /devel/v4l/temp/include/asm-generic/io.h:14,
from arch/c6x/include/generated/asm/io.h:1,
from /devel/v4l/temp/drivers/media/radio/tea575x.c:23:
/devel/v4l/temp/arch/c6x/include/asm/setup.h:17:27: error: unknown type name ‘phys_addr_t’
extern int c6x_add_memory(phys_addr_t start, unsigned long size);
It seems that, on such arch, the includes from asm/ should be
after the ones from linux/.
The proper fix would be to patch the arch files, but, as
this fix is trivial, apply it. Also, we generally put the
asm includes after the linux ones, anyway.
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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drivers/media/dvb-frontends/dib8000.c: In function 'dib8000_get_time_us':
drivers/media/dvb-frontends/dib8000.c:3957: warning: 'interleaving' may be used uninitialized in this function
drivers/media/dvb-frontends/dib8000.c:3956: warning: 'rate_denum' may be used uninitialized in this function
Those are actually false positives, but it doesn't hurt cleaning them.
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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When compiling with avr32, it gets those errors:
drivers/media/dvb-frontends/dib8000.c: In function 'dib8000_get_stats':
drivers/media/dvb-frontends/dib8000.c:4121: warning: integer constant is too large for 'long' type
Fix integer representation to avoid overflow.
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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This function isn't used nowhere outside the same .c file.
Fixes this warning:
drivers/media/radio/si4713/radio-usb-si4713.c:418:5: warning: no previous prototype for 'si4713_register_i2c_adapter' [-Wmissing-prototypes]
int si4713_register_i2c_adapter(struct si4713_usb_device *radio)
^
Cc: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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Fix two warns below, by commenting the unused code:
drivers/media/platform/sh_vou.c: In function 'sh_vou_configure_geometry':
drivers/media/platform/sh_vou.c:446:49: warning: variable 'height_max' set but not used [-Wunused-but-set-variable]
unsigned int black_left, black_top, width_max, height_max,
^
drivers/media/platform/sh_vou.c: In function 'sh_vou_isr':
drivers/media/platform/sh_vou.c:1056:13: warning: variable 'side' set but not used [-Wunused-but-set-variable]
static int side;
^
Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Cc: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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Added command line parameter preallocate_big_buffers so that the digital
transfer buffers can be allocated when the driver is registered. They
do not have to be allocated every time a feed is started.
Signed-off-by: Tim Mester <tmester@ieee.org>
Acked-by: Devin Heitmueller <dheitmueller@kernellabs.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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Free what was allocated if there is a failure allocating
transfer buffers.
Stop the feed on a start feed error. The stop feed is not always called
if start feed fails. If the feed is not stopped on error, then the driver
will be stuck so that it can never start feeding again.
[m.chehab@samsung.com: CodingStyle cleanup]
Signed-off-by: Tim Mester <tmester@ieee.org>
Acked-by: Devin Heitmueller <dheitmueller@kernellabs.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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Add v4l2 controls to set desired profile for VP8 encoder.
Acceptable levels for VP8 encoder are
0: Version 0
1: Version 1
2: Version 2
3: Version 3
Signed-off-by: Kiran AVND <avnd.kiran@samsung.com>
Signed-off-by: Pawel Osciak <posciak@chromium.org>
Signed-off-by: Arun Kumar K <arun.kk@samsung.com>
Signed-off-by: Kamil Debski <k.debski@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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s5p_mfc_get_node_type() relies on get_index() helper function, which in
turn relies on video_device index numbers assigned on driver
registration. All this code is not really needed, because there is
already access to respective video_device structures via common
s5p_mfc_dev structure. This fixes the issues introduced by patch
1056e4388b0454917a512618c8416a98628fc9ce ("v4l2-dev: Fix race condition
on __video_register_device"), which has been merged in v3.12-rc1.
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: stable@vger.kernel.org
Signed-off-by: Kamil Debski <k.debski@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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Adds v4l2 controls to set MIN, MAX QP values and
I, P frame QP for vp8 encoder.
Signed-off-by: Kiran AVND <avnd.kiran@samsung.com>
Signed-off-by: Arun Kumar K <arun.kk@samsung.com>
Signed-off-by: Kamil Debski <k.debski@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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Now that em28xx can be compiled without V4L support, we should
call em28xx_setup_xc3028() on both em28xx-v4l and em28xx-dvb
modules.
Reported-by: Chris Lee <updatelee@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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The buffer size on nxt200x is not enough:
...
> Dec 20 10:52:04 rich kernel: [ 31.747949] nxt200x: nxt200x_writebytes: i2c wr reg=002c: len=255 is too big!
...
Increase it to 256 bytes.
Reported-by: Rich Freeman <rich0@gentoo.org>
Cc: stable@vger.kernel.org
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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If em28xx is disconnected, return -ENODEV to all PCM callbacks.
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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The URB calculus code may eventually be moved to some other
place, like at pcm open, if it ends by needing more setups, like
working with different bit rates, or different audio latency.
So, move it into a separate routine. That also makes the code
more readable.
No functional changes.
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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Pulseaudio has the bad habit of stopping a streaming audio if
a device, opened in non-block mode, waits.
It is impossible to avoid em28xx to wait, as it will send commands
via I2C, and other I2C operations may be happening (firmware
transfers, Remote Controller polling, etc). Yet, as each em28xx
subdriver locks em28xx-dev to protect the access to the hardware,
it is possible to minimize the audio glitches by returning -EAGAIN
to pulseaudio, if the lock is already taken by another subdriver.
Reported-by: Antti Palosaari <crope@iki.fi>
Tested-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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If the period size is wrong, userspace will assume a wrong delay
any may negociate an inadequate value.
The em28xx devices use 8 for URB interval, in microframes,
and the driver programs it to have 64 packets.
That means that the IRQ sampling period is 125 * 8 * 64,
with is equal to 64 ms.
So, that's the minimal latency with the current settings. It is
possible to program a lower latency, by using less than 64 packets,
but that increases the amount of bandwitdh used, and the number of
IRQ events per second.
In any case, in order to support it, the driver logic should be
changed to fill those parameters in realtime.
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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The current code hardcodes the number of audio URBs, the number
of packets per URB and the maximum URB size.
This is not a good idea, as it:
- wastes more bandwidth than necessary, by using a very
large number of packets;
- those constants are bound to an specific scenario, with
a bandwidth of 48 kHz;
- don't take the maximum endpoint size into account;
- with urb->interval = 1 on xHCI, those constraints cause a "funny"
setup: URBs with 64 packets inside, with only 24 bytes total. E. g.
a complete waste of space.
Change the code to do dynamic URB audio calculus and allocation.
For now, use the same constraints as used before this patch, to
avoid regressions.
A good scenario (tested) seems to use those defines, instead:
#define EM28XX_MAX_AUDIO_BUFS 8
#define EM28XX_MIN_AUDIO_PACKETS 2
But let's not do such change here, letting the optimization to
happen on latter patches, after more tests.
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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De-allocate memory and free sound if an error happens.
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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Just filling urb->interval with 1 is wrong, and causes a different
behaviour with xHCI.
With EHCI, the URB size is typically 192 bytes. However, as
xHCI specifies intervals in microframes, the URB size becomes
too short (24 bytes).
With this patch, the interval will be properly initialized, and
the device will behave the same if connected into a xHCI or an
EHCI device port.
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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