Just like with ctrl events, drivers may want to get called back on
listener add / remove for other event types too. Rather then special
casing all of this in subscribe / unsubscribe event it is better to
use ops for this.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This driver was severely broken. This patch makes it work again, and updates
it to the latest V4L2 frameworks (except for videobuf2). It passes the
v4l2-compliance tests and it now handles suspend/resume correctly.
Several custom controls are replaced by new standard controls, only the
USB_ALTERNATE control remains.
Tested with the Hanse HVS-CM500PC USB microscope.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
The et61x251 has been deprecated for a couple of releases now, as all
devices it supports are also supported by gspca_etoms, and it has not
seen any maintenance in years. So now it is time to remove it.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Note like all info on the pac73xx chips, this info was found by trial and
error, so it is not necessarily 100% correct.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Before this patch sometimes the camera would run out of bandwidth when
running at 640x480@30.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
We can only control the clockdivider to control exposure on the pac7311,
making our expo control coarse, switch to an autogain algorithm optimized for
this.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Now that the pac7302 and pac7311 drivers are split, they no longer
share there control settings, so there is no need to scale the controls
to register values, instead make them reflect the registers directly.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
It turns out that the flush to sensor command needs to be done per register
bank. We were missing one such flush in set_exposure, causing exposure changes
to only show up when another setting in the same bank also got changed.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
The pac7302 and pac7311 driver still contains some comments from before
they were separated, such as marking certain functions 7302 or 7311 only,
with the new split drivers these make no sense, remove them.
Also removed the empty/unused sd_stop0 function from pac7311.c
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Allow users of gspca/autogain_functions.h to declare which of the autogain
algoritms they are going to use. This allows us to remove the hacks from
drivers which don't use coarse_grained_expo_autogain.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Prior to this patch the stk-webcam driver was enabling the vflip and mirror
bits in the sensor by default. Which only is the right thing to do if the
sensor is actually mounted upside down, which it usually is not.
Actually we've received upside down reports for both usb-ids which this
driver supports, one for an "ASUSTeK Computer Inc." "A3H" laptop with
a build in 174f:a311 webcam, and one for an "To Be Filled By O.E.M."
"Z96FM" laptop with a build in 05e1:0501 webcam.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Prevent subtle surprises to both people working on the kconfig code
and people using make allnoconfig allyesconfig allmoconfig and
randconfig by only attempting to read a config file if
KCONFIG_ALLCONFIG is set.
Common sense suggests attempting to read the extra config files does
not make sense unless requested. The documentation says the code
won't attempt to read the extra config files unless requested.
Current usage does not appear to include people depending on the code
reading the config files without the variable being set So do the
simple thing and stop reading config files when passed
all{no,yes,mod,def,rand}config unless KCONFIG_ALLCONFIG environment
variable is set.
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Michal Marek <mmarek@suse.cz>
Added hardware seek support based on information gleaned from the
GPLv2 driver available here:
http://sourceforge.net/projects/av-usbradio/
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Thanks to an older driver by Faidon Liambotis <paravoid@debian.org> (as noted
in the radio-mr800 comment block at the start) for figuring out how to get the
signal/stereo state.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Implement the control framework and update to the latest V4L2 framework.
The v4l2-compliance tool now runs without errors.
Fixed bad g/s_tuner handling with respect to mono/stereo.
Support control events.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
If there is an error when creating controls the v4l2_ctrl_handler_free
function must be called.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
None of the machines uses the gain ramp possibility for HS/HF.
This code path is mostly unused and it does not reduces the pop
noise on the output (it alters it to sound a bit different).
The preferred method to reduce pop noise is to use ABE.
Remove the gain ramp, and related features form the driver.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Commit 31b3c9d723 ("xen/x86: Implement x86_apic_ops") implemented
this:
... without considering that on UP the function pointer might be NULL.
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Link: http://lkml.kernel.org/n/tip-3pfty0ml4yp62phbkchichh0@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This pull request contains one workaround for a Silicon
Issue found on all RTL releases prior to 2.20a, which
would cause a metastability state on Run/Stop bit.
We also have some patches implementing a few extra Standard
requests introduced by USB3 spec (Set SEL and Set Isoch Delay),
as well as one patch, which has been pending for a long time,
implementing LPM support.
Last, but not least, we are splitting the host address space
out of the dwc3 core driver otherwise xHCI won't be able to
request_mem_region() its own address space. This patch is
only needed because we are (as we should) re-using the xHCI
driver, which is a completely separate module.
Together with these three big changes, come a few extra preparatory
patches which most move code around, define macros and so on, as
well as a fix for Isochronous transfers which hasn't been triggered
before.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.12 (GNU/Linux)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=qgf/
-----END PGP SIGNATURE-----
Merge tag 'dwc3-for-v3.5' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb into usb-next
usb: dwc3: patches for v3.5 merge window
This pull request contains one workaround for a Silicon
Issue found on all RTL releases prior to 2.20a, which
would cause a metastability state on Run/Stop bit.
We also have some patches implementing a few extra Standard
requests introduced by USB3 spec (Set SEL and Set Isoch Delay),
as well as one patch, which has been pending for a long time,
implementing LPM support.
Last, but not least, we are splitting the host address space
out of the dwc3 core driver otherwise xHCI won't be able to
request_mem_region() its own address space. This patch is
only needed because we are (as we should) re-using the xHCI
driver, which is a completely separate module.
Together with these three big changes, come a few extra preparatory
patches which most move code around, define macros and so on, as
well as a fix for Isochronous transfers which hasn't been triggered
before.
[ resolved conflicts and build error in drivers/usb/dwc3/gadget.c - gregkh]
MUSB has only two patches for this merge window adding
support for TI's TI81xx platforms which contains two
MUSB IP instances.
Nothing scary here, just yet another glue layer for MUSB.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.12 (GNU/Linux)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=wdYo
-----END PGP SIGNATURE-----
Merge tag 'musb-for-v3.5' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb into usb-next
usb: musb: patches for v3.5 merge window
MUSB has only two patches for this merge window adding
support for TI's TI81xx platforms which contains two
MUSB IP instances.
Nothing scary here, just yet another glue layer for MUSB.
Add resource_overlaps(), which returns true if two resources overlap at all.
Use this to replace the complicated check in coalesce_windows().
Signed-Off-By: Wei Yang <weiyang@linux.vnet.ibm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This pull request is quite big, but mainly because there's a
giant rework of the s3c_hsotg.c driver to make it friendlier
for other users. Samsung Exynos platforms use the DesignWare
Core USB2 IP from Synopsys so it's a bit unfair to have the
driver work for Samsung platforms only. In short, the big
rework is in preparation to make the driver more reusable.
Another big rework in this pull request came from Ido, where
he's removing the redundant pointer for the endpoint descriptor
from the controller driver's own endpoint representation. The
same pointer is available through the generic struct usb_ep
structure.
Also on this pull request is the conversion of a few extra
controller drivers to the new style registration, which allows
multiple controllers to be available on the same platform and
helps remove global pointers from those drivers.
Together with those big changes, there's the usual fixes and cleanups
to gadget drivers. Nothing major.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.12 (GNU/Linux)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=irDV
-----END PGP SIGNATURE-----
Merge tag 'gadget-for-v3.5' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb into usb-next
usb: gadget: patches for v3.5
This pull request is quite big, but mainly because there's a
giant rework of the s3c_hsotg.c driver to make it friendlier
for other users. Samsung Exynos platforms use the DesignWare
Core USB2 IP from Synopsys so it's a bit unfair to have the
driver work for Samsung platforms only. In short, the big
rework is in preparation to make the driver more reusable.
Another big rework in this pull request came from Ido, where
he's removing the redundant pointer for the endpoint descriptor
from the controller driver's own endpoint representation. The
same pointer is available through the generic struct usb_ep
structure.
Also on this pull request is the conversion of a few extra
controller drivers to the new style registration, which allows
multiple controllers to be available on the same platform and
helps remove global pointers from those drivers.
Together with those big changes, there's the usual fixes and cleanups
to gadget drivers. Nothing major.
Fit it into 80 columns so that it is readable in menuconfig.
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
The accessing PCI configuration space with the PCI BIOS32 service does
not work in PV guests.
On systems without MMCONFIG or where the BIOS hasn't marked the
MMCONFIG region as reserved in the e820 map, the BIOS service is
probed (even though direct access is preferred) and this hangs.
CC: stable@kernel.org
Acked-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
[v1: Fixed compile error when CONFIG_PCI is not set]
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Since this is a generic API which should support any userspace interface
for reporting jacks update the documentation a little to make that a bit
clearer.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Get rid of these:
drivers/pci/pcie/portdrv_core.c: In function 'pcie_port_device_register':
drivers/pci/pcie/portdrv_core.c:275:16: warning: 'cap_mask' may be used
uninitialized in this function [-Wuninitialized]
drivers/pci/pcie/portdrv_core.c:240:6: note: 'cap_mask' was declared here
In some cases, 'cap_mask' may be not set in pcie_port_platform_notify,
holding a garbage value.
Signed-off-by: Chunhe Lan <Chunhe.Lan@freescale.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Update the git tree address and patchwork. Drop the separate PCI hotplug
entry because it's redundant.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
The checks that exist in mwait_usable() for "idle=" kernel
parameters are insufficient. As a result, mwait_usable() can
return 1 even if "idle=nomwait" or "idle=poll" or "idle=halt"
parameters are passed.
Of these cases, incorrect handling of idle=nomwait is a
universal problem since mwait can get used for usual CPU idling.
However the rest of the cases are problematic only during CPU
Hotplug (offline) because, in the CPU offline path, the function
mwait_play_dead() is called, which might result in mwait being
used in the offline CPUs, if mwait_usable() happens to return 1.
Fix these issues by checking for the boot time "idle=" kernel
parameter properly in mwait_usable().
The first issue (usual cpu idling) is demonstrated below:
Before applying the patch (dmesg snippet):
[ 0.000000] Command line: [...] idle=nomwait
[ 0.000000] Kernel command line: [...] idle=nomwait
[ 0.000000] RCU dyntick-idle grace-period acceleration is enabled.
[ 0.140606] using mwait in idle threads. <======= mwait being used
[ 4.303986] cpuidle: using governor ladder
[ 4.308232] cpuidle: using governor menu
After applying the patch:
[ 0.000000] Command line: [...] idle=nomwait
[ 0.000000] Kernel command line: [...] idle=nomwait
[ 0.000000] RCU dyntick-idle grace-period acceleration is enabled.
[ 4.264100] cpuidle: using governor ladder
[ 4.268342] cpuidle: using governor menu
Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Acked-by: Deepthi Dharwar <deepthi@linux.vnet.ibm.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Cc: venki@google.com
Cc: suresh.b.siddha@intel.com
Cc: Borislav Petkov <bp@amd64.org>
Cc: lenb@kernel.org
Cc: Rafael J. Wysocki <rjw@sisk.pl>
Link: http://lkml.kernel.org/r/4F9E37B8.30001@linux.vnet.ibm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
On virtual environments, apic_read could take a long time. As a
result, under certain conditions the ack pending loop may exit
without any queued irqs left, but after more than one second. A
warning will be printed needlessly in this case.
If the loop is about to exit regardless of max_loops, don't
update it.
Signed-off-by: Shai Fultheim <shai@scalemp.com>
[ rebased and reworded the commit message]
Signed-off-by: Ido Yariv <ido@wizery.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1334873552-31346-1-git-send-email-ido@wizery.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Settling time is require when there is voltage output change.
Implement set_voltage_time_sel() callback which returns delay time
for voltage change to settle down to new value.
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Enable cache of device register using regmap cache RBTREE.
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This patchset introduces a generic ops-interface for
accessing interrupt remapping hardware on x86. It factors
out the VT-d specific code from io_apic.c and moves it to
drivers/iommu. These changes will be used to add support for
AMD interrupt remapping hardware.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.11 (GNU/Linux)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=H+Nt
-----END PGP SIGNATURE-----
Merge tag 'intr-remapping-ops-for-ingo' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu into core/iommu
- This patchset introduces a generic ops-interface for
accessing interrupt remapping hardware on x86. It factors
out the VT-d specific code from io_apic.c and moves it to
drivers/iommu. These changes will be used to add support for
AMD interrupt remapping hardware.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
If I try to do "cat /sys/kernel/debug/kernel_page_tables"
I end up with:
BUG: unable to handle kernel paging request at ffffc7fffffff000
IP: [<ffffffff8106aa51>] ptdump_show+0x221/0x480
PGD 0
Oops: 0000 [#1] SMP
CPU 0
.. snip..
RAX: 0000000000000000 RBX: ffffc00000000fff RCX: 0000000000000000
RDX: 0000800000000000 RSI: 0000000000000000 RDI: ffffc7fffffff000
which is due to the fact we are trying to access a PFN that is not
accessible to us. The reason (at least in this case) was that
PGD[256] is set to __HYPERVISOR_VIRT_START which was setup (by the
hypervisor) to point to a read-only linear map of the MFN->PFN array.
During our parsing we would get the MFN (a valid one), try to look
it up in the MFN->PFN tree and find it invalid and return ~0 as PFN.
Then pte_mfn_to_pfn would happilly feed that in, attach the flags
and return it back to the caller. 'ptdump_show' bitshifts it and
gets and invalid value that it tries to dereference.
Instead of doing all of that, we detect the ~0 case and just
return !_PAGE_PRESENT.
This bug has been in existence .. at least until 2.6.37 (yikes!)
CC: stable@kernel.org
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
On x86_64 on AMD machines where the first APIC_ID is not zero, we get:
ACPI: LAPIC (acpi_id[0x01] lapic_id[0x10] enabled)
BIOS bug: APIC version is 0 for CPU 1/0x10, fixing up to 0x10
BIOS bug: APIC version mismatch, boot CPU: 0, CPU 1: version 10
which means that when the ACPI processor driver loads and
tries to parse the _Pxx states it fails to do as, as it
ends up calling acpi_get_cpuid which does this:
for_each_possible_cpu(i) {
if (cpu_physical_id(i) == apic_id)
return i;
}
And the bootup CPU, has not been found so it fails and returns -1
for the first CPU - which then subsequently in the loop that
"acpi_processor_get_info" does results in returning an error, which
means that "acpi_processor_add" failing and per_cpu(processor)
is never set (and is NULL).
That means that when xen-acpi-processor tries to load (much much
later on) and parse the P-states it gets -ENODEV from
acpi_processor_register_performance() (which tries to read
the per_cpu(processor)) and fails to parse the data.
Reported-by-and-Tested-by: Stefan Bader <stefan.bader@canonical.com>
Suggested-by: Boris Ostrovsky <boris.ostrovsky@amd.com>
[v2: Bit-shift APIC ID by 24 bits]
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
On some architectures (such as vSMP), it is possible to have
CPUs with a different number of cores sharing the same cache.
The current implementation implicitly assumes that all CPUs will
have the same number of cores sharing caches, and as a result,
different CPUs can end up with the same l2/l3 ids.
Fix this by masking out the shared cache bits, instead of
shifting the APICID. By doing so, it is guaranteed that the
generated cache ids are always unique.
Signed-off-by: Shai Fultheim <shai@scalemp.com>
[ rebased, simplified, and reworded the commit message]
Signed-off-by: Ido Yariv <ido@wizery.com>
Cc: Borislav Petkov <borislav.petkov@amd.com>
Cc: Andreas Herrmann <andreas.herrmann3@amd.com>
Cc: Mike Travis <travis@sgi.com>
Cc: Dave Jones <davej@redhat.com>
Link: http://lkml.kernel.org/r/1334873351-31142-1-git-send-email-ido@wizery.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
