05 Oct, 2011
1 commit
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To read the current PM QoS value for a given device we need to
make sure that the device's power.constraints object won't be
removed while we're doing that. For this reason, put the
operation under dev->power.lock and acquire the lock
around the initialization and removal of power.constraints.Moreover, since we're using the value of power.constraints to
determine whether or not the object is present, the
power.constraints_state field isn't necessary any more and may be
removed. However, dev_pm_qos_add_request() needs to check if the
device is being removed from the system before allocating a new
PM QoS constraints object for it, so make it use the
power.power_state field of struct device for this purpose.Signed-off-by: Rafael J. Wysocki
25 Aug, 2011
20 commits
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Add a global notification chain that gets called upon changes to the
aggregated constraint value for any device.
The notification callbacks are passing the full constraint request data
in order for the callees to have access to it. The current use is for the
platform low-level code to access the target device of the constraint.Signed-off-by: Jean Pihet
Reviewed-by: Kevin Hilman
Signed-off-by: Rafael J. Wysocki -
Implement the per-device PM QoS constraints by creating a device
PM QoS API, which calls the PM QoS constraints management core code.The per-device latency constraints data strctures are stored
in the device dev_pm_info struct.The device PM code calls the init and destroy of the per-device constraints
data struct in order to support the dynamic insertion and removal of the
devices in the system.To minimize the data usage by the per-device constraints, the data struct
is only allocated at the first call to dev_pm_qos_add_request.
The data is later free'd when the device is removed from the system.
A global mutex protects the constraints users from the data being
allocated and free'd.Signed-off-by: Jean Pihet
Reviewed-by: Kevin Hilman
Signed-off-by: Rafael J. Wysocki -
- Misc fixes to improve code readability:
* rename struct pm_qos_request_list to struct pm_qos_request,
* rename pm_qos_req parameter to req in internal code,
consistenly use req in the API parameters,
* update the in-kernel API callers to the new parameters names,
* rename of fields names (requests, list, node, constraints)Signed-off-by: Jean Pihet
Acked-by: markgross
Reviewed-by: Kevin Hilman
Signed-off-by: Rafael J. Wysocki -
The PM QoS implementation files are better named
kernel/power/qos.c and include/linux/pm_qos.h.The PM QoS support is compiled under the CONFIG_PM option.
Signed-off-by: Jean Pihet
Acked-by: markgross
Reviewed-by: Kevin Hilman
Signed-off-by: Rafael J. Wysocki -
Since the PM clock management code in drivers/base/power/clock_ops.c
is used for both runtime PM and system suspend/hibernation, the
definitions of data structures and headers related to it should not
be located in include/linux/pm_rumtime.h. Move them to a separate
header file.Signed-off-by: Rafael J. Wysocki
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Currently pm_genpd_runtime_resume() has to walk the list of devices
from the device's PM domain to find the corresponding device list
object containing the need_restore field to check if the driver's
.runtime_resume() callback should be executed for the device.
This is suboptimal and can be simplified by using power.sybsys_data
to store device information used by the generic PM domains code.Signed-off-by: Rafael J. Wysocki
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Since the power.subsys_data device field will be used by multiple
filesystems, introduce a reference counting mechanism for it to avoid
freeing it prematurely or changing its value at a wrong time.Make the PM clocks management code that currently is the only user of
power.subsys_data use the new reference counting.Signed-off-by: Rafael J. Wysocki
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Introduce struct pm_subsys_data that may be subclassed by subsystems
to store subsystem-specific information related to the device. Move
the clock management fields accessed through the power.subsys_data
pointer in struct device to the new strucutre.Signed-off-by: Rafael J. Wysocki
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Change the name of the second argument of pm_genpd_add_subdomain()
so that it is (a) shorter and (b) in agreement with the name of
the second argument of pm_genpd_add_subdomain().Signed-off-by: Rafael J. Wysocki
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Since it is now possible for a PM domain to have multiple masters
instead of one parent, rename the "wait for parent" status to reflect
the new situation.Signed-off-by: Rafael J. Wysocki
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Currently, for a given generic PM domain there may be only one parent
domain (i.e. a PM domain it depends on). However, there is at least
one real-life case in which there should be two parents (masters) for
one PM domain (the A3RV domain on SH7372 turns out to depend on the
A4LC domain and it depends on the A4R domain and the same time). For
this reason, allow a PM domain to have multiple parents (masters) by
introducing objects representing links between PM domains.The (logical) links between PM domains represent relationships in
which one domain is a master (i.e. it is depended on) and another
domain is a slave (i.e. it depends on the master) with the rule that
the slave cannot be powered on if the master is not powered on and
the master cannot be powered off if the slave is not powered off.
Each struct generic_pm_domain object representing a PM domain has
two lists of links, a list of links in which it is a master and
a list of links in which it is a slave. The first of these lists
replaces the list of subdomains and the second one is used in place
of the parent pointer.Each link is represented by struct gpd_link object containing
pointers to the master and the slave and two struct list_head
members allowing it to hook into two lists (the master's list
of "master" links and the slave's list of "slave" links). This
allows the code to get to the link from each side (either from
the master or from the slave) and follow it in each direction.Signed-off-by: Rafael J. Wysocki
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The next patch will make it possible for a generic PM domain to have
multiple parents (i.e. multiple PM domains it depends on). To
prepare for that change it is necessary to change pm_genpd_poweron()
so that it doesn't jump to the start label after running itself
recursively for the parent domain. For this purpose, introduce a new
PM domain status value GPD_STATE_WAIT_PARENT that will be set by
pm_genpd_poweron() before calling itself recursively for the parent
domain and modify the code in drivers/base/power/domain.c so that
the GPD_STATE_WAIT_PARENT status is guaranteed to be preserved during
the execution of pm_genpd_poweron() for the parent.This change also causes pm_genpd_add_subdomain() and
pm_genpd_remove_subdomain() to wait for started pm_genpd_poweron() to
complete and allows pm_genpd_runtime_resume() to avoid dropping the
lock after powering on the PM domain.Signed-off-by: Rafael J. Wysocki
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If pm_genpd_remove_subdomain() is called to remove a PM domain's
subdomain and pm_genpd_poweron() is called for that subdomain at
the same time, and the pm_genpd_poweron() called by it recursively
for the parent returns an error, the first pm_genpd_poweron()'s
error code path will attempt to decrement the subdomain counter of
a PM domain that it's not a subdomain of any more.Rearrange the code in pm_genpd_poweron() to prevent this from
happening.Signed-off-by: Rafael J. Wysocki
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After the subdomain counter in struct generic_pm_domain has been
changed into an atomic_t field, it is possible to modify
pm_genpd_poweron() and pm_genpd_poweroff() so that they don't take
the parents locks. This requires pm_genpd_poweron() to increment
the parent's subdomain counter before calling itself recursively
for the parent and to decrement it if an error is to be returned.Signed-off-by: Rafael J. Wysocki
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Currently, pm_genpd_poweron() and pm_genpd_poweroff() need to take
the parent PM domain's lock in order to modify the parent's counter
of active subdomains in a nonracy way. This causes the locking to be
considerably complex and in fact is not necessary, because the
subdomain counters may be implemented as atomic fields and they
won't have to be modified under a lock.Replace the unsigned in sd_count field in struct generic_pm_domain
by an atomic_t one and modify the code in drivers/base/power/domain.c
to take this change into account.This patch doesn't change the locking yet, that is going to be done
in a separate subsequent patch.Signed-off-by: Rafael J. Wysocki
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Since sci_port_enable() and sci_port_disable() may be run with
interrupts off and they execute pm_runtime_get_sync() and
pm_runtime_put_sync(), respectively, the SCI device's
power.irq_safe flag has to be set to indicate that it is safe
to execute runtime PM callbacks for this device with interrupts off.Signed-off-by: Rafael J. Wysocki
Acked-by: Magnus Damm -
The lock member of struct pm_clk_data is of type struct mutex,
which is a problem, because the suspend and resume routines
defined in drivers/base/power/clock_ops.c cannot be executed
with interrupts disabled for this reason. Modify
struct pm_clk_data so that its lock member is a spinlock.Signed-off-by: Rafael J. Wysocki
Acked-by: Magnus Damm -
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid:
HID: wiimote: Add status and return request handlers
HID: wiimote: Add drm request
HID: wiimote: Register led class devices
HID: wiimote: Correctly call HID open/close callbacks
HID: wiimote: Simplify synchronization
HID: usbhid: Add support for SiGma Micro chip
HID: add support for new revision of Apple aluminum keyboard -
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
Input: ad714x - read the interrupt status registers in a row
Input: ad714x - use DMA-safe buffers for spi_write()
Input: ad714x - fix endianness issues
Input: ad714xx-spi - force SPI bus into the default 8-bit mode
Input: ep93xx_keypad - add missing include of linux/module.h
Input: tnetv107x-ts - add missing include of linux/module.h
Input: max11801_ts - correct license statement
Input: atmel_mxt_ts - report pressure information from the driver
Input: bcm5974 - Add support for newer MacBookPro8,2
Input: wacom - report id 3 returns 4 bytes of data
Input: wacom - add WAC_MSG_RETRIES define
Input: wacom - add support for the Wacom Bamboo Pen (CTL-660/K)
Input: tegra-kbc - correct call to input_free_device
Input: mpu3050 - correct call to input_free_device
Input: bcm5974 - add support for touchpads found in MacBookAir4,2
Input: mma8450 - fix module device table type
Input: remove CLOCK_TICK_RATE from analog joystick driver -
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (29 commits)
bridge: fix a possible net_device leak
net: Documentation: RFC 2553bis is now RFC 3493
atm: br2684: Fix oops due to skb->dev being NULL
ipv6: Fix ipv6_getsockopt for IPV6_2292PKTOPTIONS
net: netdev-features.txt update to Documentation/networking/00-INDEX
vlan: reset headers on accel emulation path
forcedeth: call vlan_mode only if hw supports vlans
via-velocity: remove non-tagged packet filtering
bonding:reset backup and inactive flag of slave
net_sched: fix port mirror/redirect stats reporting
sit tunnels: propagate IPv6 transport class to IPv4 Type of Service
gianfar: reduce stack usage in gianfar_ethtool.c
net: minor update to Documentation/networking/scaling.txt
net: add missing entries to Documentation/networking/00-INDEX
gianfar: prevent buggy hw rx vlan tagging
net: sh_eth: Fix build by forgot including linux/interrupt.h
drivers/net/can/sja1000/plx_pci.c: eliminate double free
usbnet/cdc_ncm: Don't use stack variables for DMA
vmxnet3: Don't enable vlan filters in promiscuous mode.
iwlagn: sysfs couldn't find the priv pointer
...
24 Aug, 2011
2 commits
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* git://git.infradead.org/users/cbou/battery-3.1:
s3c-adc-battery: Fix compilation error due to missing header (module.h)
max8997_charger: Needs module.h
max8998_charger: Needs module.h
23 Aug, 2011
15 commits
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Toshiba Satellite L300D with ATI Mobility Radeon X1100 sends data
to i2c bus for a HDMI connector that is not implemented/existent
on the notebook's board.Fix by applying extented DDC probing for this connector.
Requires [PATCH] drm/radeon: Extended DDC Probing for Connectors
with Improperly Wired DDC LinesTested for kernel 2.6.38 on Toshiba Satellite L300D notebook
BugLink: http://bugs.launchpad.net/bugs/826677
Signed-off-by: Thomas Reim
Acked-by: Chris Routh
Cc:
Reviewed-by: Alex Deucher
Signed-off-by: Dave Airlie -
The wiimote resets the current drm when an extension is plugged in.
Fortunately, it also sends a status report in this situation so we just
reset the drm on every status report to keep the drm consistent.Also handle return reports from the wiimote which indicate success and
failure of requests that we've sent.Signed-off-by: David Herrmann
Signed-off-by: Jiri Kosina -
The wiimote reports data in several data reporting modes (DRM). The DRM
request makes the wiimote send data in the requested drm.The DRM mode can be set explicitely or can be chosen by the driver. To let
the driver choose the DRM mode, pass WIIPROTO_REQ_NULL placeholder to it. This
is no valid request and is replaced with an appropriate DRM.Currently, the driver always sets the basic DRM_K mode, but this will be
extended when further peripherals like accelerometer and IR are supported.Signed-off-by: David Herrmann
Signed-off-by: Jiri Kosina -
This registers 4 led devices to allow controlling the wiimote leds via standard
LED sysfs API. It removes the four sysfs attributes so we don't have two APIs
for one device.Signed-off-by: David Herrmann
Signed-off-by: Jiri Kosina -
Even though the bluetooth hid backend does not react on open/close callbacks, we
should call them to be consistent with other hid drivers.Also the new input open/close handlers will be used in future to prepare the
wiimote device for IR/extension input.Signed-off-by: David Herrmann
Signed-off-by: Jiri Kosina -
The new locking scheme in HID core allows us to remove a bit of synchronization.
Since the HID layer acts synchronously we simply register input core last and
there are no synchonization issues anymore.
Also register sysfs files after that to simplify the code.Signed-off-by: David Herrmann
Signed-off-by: Jiri Kosina -
This was true for new TTM_PL_SYSTEM and new TTM_PL_TT cases, but wasn't
the case on TTM_PL_SYSTEMTTM_PL_TT moves, which causes trouble on some
paths as nouveau's move_notify() hook requires that the dma addresses be
valid at this point.Signed-off-by: Ben Skeggs
Signed-off-by: Dave Airlie -
Nouveau makes the assumption that if a TTM is bound there will be a mm_node
around for it and the backwards ordering here resulted in a use-after-free
on some eviction paths.Signed-off-by: Ben Skeggs
Signed-off-by: Dave Airlie -
ttm_tt_destroy kfrees passed object, so we need to nullify
a reference to it.Signed-off-by: Marcin Slusarz
Cc: stable@kernel.org
Reviewed-by: Thomas Hellstrom
Signed-off-by: Dave Airlie -
Patch to add SiGma Micro-based keyboards (1c4f:0002) to hid-quirks.
These keyboards dont seem to allow the records to be initialized, and hence a
timeout occurs when the usbhid driver attempts to initialize them. The patch
just adds the signature for these keyboards to the hid-quirks list with the
setting HID_QUIRK_NO_INIT_REPORTS. This removes the 5-10 second wait for the
timeout to occur.Signed-off-by: Jeremiah Matthey
Signed-off-by: Jiri Kosina -
…wireless into for-davem
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The interrupt status registers should be read in row to avoid invalid data.
Alter "read" method for both bus options to allow reading several registers
in a row and make sure we read interrupt status registers properly.Read sequence saves 50% of bus transactions compared to single register
reads. So use it also for the result registers, which are also located
in a row.Also update copyright notice.
Signed-off-by: Michael Hennerich
Signed-off-by: Dmitry Torokhov -
spi_write() requires use of DMA-safe (cacheline aligned) buffers.
Also use the same buffers when reading data since to avoid extra
locking and potential memory allocation in spi_write_then_read().Acked-by: Michael Hennerich
Signed-off-by: Dmitry Torokhov -
Allow driver to be used on Big Endian boxes.
Signed-off-by: Michael Hennerich
Signed-off-by: Dmitry Torokhov -
Signed-off-by: Michael Hennerich
Signed-off-by: Dmitry Torokhov
22 Aug, 2011
2 commits
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Signed-off-by: Michel Dänzer
Reviewed-by: Alex Deucher
Signed-off-by: Dave Airlie -
Otherwise these would need to be painstakingly calculated looking at the source
code.Signed-off-by: Michel Dänzer
Reviewed-by: Alex Deucher
Signed-off-by: Dave Airlie
