will not be powered off.
Signed-off-by: Lan Tianyu tianyu@intel.com
---
drivers/usb/core/port.c | 28
include/linux/usb.h | 12
2 files changed, 40 insertions(+)
diff --git a/drivers/usb/core/port.c b/drivers/usb/core/port.c
index a44523e..1b1c95e 100644
This patch is to expose usb port's pm qos flags(pm_qos_no_power_off,
pm_qos_remote_wakeup) to user space. User can set pm_qos_no_power_off
flag to prohibit the port from being powered off.
Signed-off-by: Lan Tianyu tianyu@intel.com
---
drivers/usb/core/port.c | 11 ++-
1 file
于 2013/1/10 23:14, Alan Stern 写道:
On Thu, 10 Jan 2013, Lan Tianyu wrote:
xhci driver divides the root hub into two logical hubs which work
respectively for usb 2.0 and usb 3.0 devices. They are independent
devices in the usb core. But in the ACPI table, it's one device node
and all usb2.0
it is active.
Acked-by: Rafael J. Wysocki rafael.j.wyso...@intel.com
Signed-off-by: Lan Tianyu tianyu@intel.com
---
drivers/usb/core/hub.c | 18 ++
drivers/usb/core/hub.h |4
drivers/usb/core/port.c | 43 +++
3 files changed, 65
This patch is to expose usb port's pm qos flags(pm_qos_no_power_off,
pm_qos_remote_wakeup) to user space. User can set pm_qos_no_power_off
flag to prohibit the port from being powered off.
Signed-off-by: Lan Tianyu tianyu@intel.com
---
drivers/usb/core/port.c | 11 ++-
1 file
will not be powered off.
Signed-off-by: Lan Tianyu tianyu@intel.com
---
drivers/usb/core/port.c | 28
include/linux/usb.h | 12
2 files changed, 40 insertions(+)
diff --git a/drivers/usb/core/port.c b/drivers/usb/core/port.c
index 6bb5b2b..df9fd4e 100644
ACPI information and this
also works
for non-root hub.
Signed-off-by: Lan Tianyu tianyu@intel.com
---
drivers/usb/core/hcd.c |4
drivers/usb/core/hub.c | 48
drivers/usb/core/usb.h |3 +++
3 files changed, 55 insertions(+)
diff
clear and persist
enable. When it resumes, power on port again. Add did_runtime_put
in the struct usb_port in order to call pm_runtime_get/put(portdev)
paired during suspending and resuming.
Acked-by: Rafael J. Wysocki rafael.j.wyso...@intel.com
Signed-off-by: Lan Tianyu tianyu@intel.com
The dev_pm_qos_flags() will be used in the usb core which could be
compiled as a module. This patch is to epose it.
Signed-off-by: Lan Tianyu tianyu@intel.com
---
drivers/base/power/qos.c |1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/base/power/qos.c b/drivers/base/power
On 2013年01月09日 20:52, Sergei Shtylyov wrote:
Hello.
On 09-01-2013 12:45, Lan Tianyu wrote:
The dev_pm_qos_flags() will be used in the usb core which could be
compiled as a module. This patch is to epose it.
^
Either expose or export
On 2013年01月09日 23:02, Alan Stern wrote:
On Wed, 9 Jan 2013, Lan Tianyu wrote:
The dev_pm_qos_flags() will be used in the usb core which could be
compiled as a module. This patch is to epose it.
Signed-off-by: Lan Tianyu tianyu@intel.com
---
drivers/base/power/qos.c |1 +
1 file
port number which is reflected in the xhci
extended capabilities table. This patch is to add find_raw_port_number
callback to struct hc_driver() and fill it with xhci_find_raw_port_number().
Signed-off-by: Lan Tianyu tianyu@intel.com
---
drivers/usb/core/hcd.c |9 +
drivers
extended capabilities table before binding.
Signed-off-by: Lan Tianyu tianyu@intel.com
---
drivers/usb/core/usb-acpi.c |4
1 file changed, 4 insertions(+)
diff --git a/drivers/usb/core/usb-acpi.c b/drivers/usb/core/usb-acpi.c
index cef4252..40f5a6a 100644
--- a/drivers/usb/core/usb
This patch is to create driver/usb/core/(port.c,hub.h) files and move usb
port related code into port.c.
Signed-off-by: Lan Tianyu tianyu@intel.com
---
drivers/usb/core/Makefile |1 +
drivers/usb/core/hub.c| 107 +
drivers/usb/core/hub.h
Some platforms provide usb port connect types through ACPI. This
patch is to add this new attribute to expose these information
to user space.
Signed-off-by: Lan Tianyu tianyu@intel.com
---
Documentation/ABI/testing/sysfs-bus-usb |9 +++
drivers/usb/core/port.c | 43
To show the relationship between usb port and child device,
add link file port under usb device's sysfs directoy and
device under usb port device's sysfs directory. They are linked
to each other.
Signed-off-by: Lan Tianyu tianyu@intel.com
---
drivers/usb/core/hub.c | 26
Change since v1:
optimize the export connect type patch and adjust the DeviceRemovalbe
flag
in the rh_call_control() after GetHubDescriptor request being processed.
move all debounce operation to usb port's runtime resume callback(). Add
did_runtime_put in the struct usb_port to
This patch is to register usb port's acpi power resources. Create
link between usb port device and its acpi power resource.
Signed-off-by: Lan Tianyu tianyu@intel.com
---
drivers/usb/core/port.c |3 +++
drivers/usb/core/usb-acpi.c | 20
drivers/usb/core/usb.h
On 2013年01月08日 23:16, Alan Stern wrote:
On Tue, 8 Jan 2013, Lan Tianyu wrote:
On 2013年01月08日 02:44, Alan Stern wrote:
On Sun, 6 Jan 2013, Lan Tianyu wrote:
This patch is to expose usb port's pm qos flags(pm_qos_no_power_off,
pm_qos_remote_wakeup) to user space. User can set
This patch is to expose usb port's pm qos flags(pm_qos_no_power_off,
pm_qos_remote_wakeup) to user space. User can set pm_qos_no_power_off
flag to prohibit the port from being power off.
Signed-off-by: Lan Tianyu tianyu@intel.com
---
drivers/usb/core/port.c |9 +++--
1 file changed
On 2013年01月06日 23:16, Sergei Shtylyov wrote:
Hello.
On 06-01-2013 12:29, Lan Tianyu wrote:
Some usb devices can't be resumed correctly after power off. This
patch is to add usb_device_allow_power_off() and
usb_device_prevent_power_off()
for device's driver to allow or prohibit device
Change since v1:
optimize the export connect type patch and adjust the DeviceRemovalbe
flag
in the rh_call_control() after GetHubDescriptor request being processed.
move all debounce operation to usb port's runtime resume callback(). Add
did_runtime_put in the struct usb_port to
This patch is to create driver/usb/core/(port.c,hub.h) files and move usb
port related code into port.c.
Signed-off-by: Lan Tianyu tianyu@intel.com
---
drivers/usb/core/Makefile |1 +
drivers/usb/core/hub.c| 107 +
drivers/usb/core/hub.h
ACPI information and this
also works
for non-root hub.
Signed-off-by: Lan Tianyu tianyu@intel.com
---
drivers/usb/core/hcd.c |4
drivers/usb/core/hub.c | 48
drivers/usb/core/usb.h |3 +++
3 files changed, 55 insertions(+)
diff
Some platforms provide usb port connect types through ACPI. This
patch is to add this new attribute to expose these information
to user space.
Signed-off-by: Lan Tianyu tianyu@intel.com
---
Documentation/ABI/testing/sysfs-bus-usb |9 +++
drivers/usb/core/port.c | 43
To show the relationship between usb port and child device,
add link file port under usb device's sysfs directoy and
device under usb port device's sysfs directory. They are linked
to each other.
Signed-off-by: Lan Tianyu tianyu@intel.com
---
drivers/usb/core/hub.c | 26
This patch is to register usb port's acpi power resources. Create
link between usb port device and its acpi power resource.
Signed-off-by: Lan Tianyu tianyu@intel.com
---
drivers/usb/core/port.c |3 +++
drivers/usb/core/usb-acpi.c | 20
drivers/usb/core/usb.h
it is active.
Acked-by: Rafael J. Wysocki rafael.j.wyso...@intel.com
Signed-off-by: Lan Tianyu tianyu@intel.com
---
drivers/usb/core/hub.c | 18 ++
drivers/usb/core/hub.h |4
drivers/usb/core/port.c | 37 +
3 files changed, 59 insertions
clear and persist
enable. When it resumes, power on port again. Add did_runtime_put
in the struct usb_port in order to call pm_runtime_get/put(portdev)
paired during suspending and resuming.
Acked-by: Rafael J. Wysocki rafael.j.wyso...@intel.com
Signed-off-by: Lan Tianyu tianyu@intel.com
This patch is to expose usb port's pm qos flags(pm_qos_no_power_off,
pm_qos_remote_wakeup) to user space. User can set pm_qos_no_power_off
flag to prohibit the port from being power off.
Signed-off-by: Lan Tianyu tianyu@intel.com
---
drivers/usb/core/port.c |9 +++--
1 file changed
is to add usb_device_allow_power_off() for device's driver to allow or
prohibit device to be power off the device. Call pm_runtime_get_sync(portdev)
to increase port's usage count and then port will not be suspended. The
device will not be power off.
Signed-off-by: Lan Tianyu tianyu@intel.com
. The
device will not be power off.
Signed-off-by: Lan Tianyu tianyu@intel.com
---
Sorry, correct format issue.
---
drivers/usb/core/hub.c | 28
include/linux/usb.h|1 +
2 files changed, 29 insertions(+)
diff --git a/drivers/usb/core/hub.c b/drivers/usb
On 2012年12月19日 23:39, Alan Stern wrote:
On Wed, 19 Dec 2012, lantianyu wrote:
I just find busy_bits is set or clear in the usb_port_resume() and
usb_reset_and_verify_device(). So currently we should keep my changes
mutually exclusive with them, right?
Don't forget about what happens when a
On 2012年12月18日 04:06, Alan Stern wrote:
On Mon, 17 Dec 2012, Octavio Alvarez wrote:
On Thu, 13 Dec 2012 00:45:05 -0800, Lan Tianyu tianyu@intel.com
wrote:
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index f034716..9335f1b 100644
--- a/drivers/usb/core/hcd.c
+++ b
On 2012年12月12日 23:56, Alan Stern wrote:
On Wed, 12 Dec 2012, Lan Tianyu wrote:
I tested a usb ssd which consumes about 1s to makes usb port status
enter into connect status after powering off and powering on the port.
So I set the tries 20 and the longest latency is larger than 2s
On 2012年12月13日 04:28, Frank Schäfer wrote:
Am 12.12.2012 09:23, schrieb Lan Tianyu:
On 2012年12月12日 05:59, Frank Schäfer wrote:
Am 11.12.2012 17:48, schrieb Alan Stern:
[snip]
We really need to know which component is bad: the host controller or
the device.
It happens with all USB 1.1
On 2012年12月13日 23:47, Alan Stern wrote:
On Thu, 13 Dec 2012, Frank Schäfer wrote:
I write a quirk patch. Can you test?
Yes, that makes it work !
I just find one MCP51 and two MCP79 OHCI id. Can you provide more buggy
hcd id via lspci -nnvvv?
Thanks.
I have the MCP61 (rev. A2) with id
On 2012年12月13日 23:35, Frank Schäfer wrote:
Am 13.12.2012 09:45, schrieb Lan Tianyu:
[snip]
I am curious about whether disabling usb device's wakeup rather than usb
hc's would make suspend work. Can you do a test?
Go to /sys/bus/usb/devices/ and enter the usb 1,1 device
directory(normally
On 2012年12月12日 05:59, Frank Schäfer wrote:
Am 11.12.2012 17:48, schrieb Alan Stern:
[snip]
We really need to know which component is bad: the host controller or
the device.
It happens with all USB 1.1 devices I have (several mice and a HP
Deskjet 960c printer).
The same devices do not
On 2012年12月12日 00:35, Alan Stern wrote:
On Tue, 11 Dec 2012, Lan Tianyu wrote:
@@ -108,11 +109,14 @@ MODULE_PARM_DESC(use_both_schemes,
DECLARE_RWSEM(ehci_cf_port_reset_rwsem);
EXPORT_SYMBOL_GPL(ehci_cf_port_reset_rwsem);
+#define HUB_PORT_RECONNECT_TRIES 20
20 is an awful lot. Do
On 2012年12月12日 23:50, Alan Stern wrote:
On Wed, 12 Dec 2012, Lan Tianyu wrote:
Hi Alan:
About your question of Does the device send a remote wakeup request
even when it is disabled for remote wakeup?, I am not very clear.
Default, device remote wakeup is disabled and if we disable
Hi AlanGreg:
We meet a problem that bind usb3.0 port(supper-speed port) with ACPI.
The main problem is that the port index num of ss port in the usb ocre
is mismatched with its counterpart in the ACPI table.
The xhci usb3.0 root hub port's index num is based on 0 in the usb
On 2012年12月11日 00:53, Alan Stern wrote:
On Mon, 10 Dec 2012, Lan Tianyu wrote:
Hi Alan:
I write a patch based on the needs_debounce flag. The flag will be set
when port has child device and power on successfully. Otherwise, I
separate resume port and wait for connect
On 2012年12月11日 03:45, Sarah Sharp wrote:
On Mon, Dec 10, 2012 at 02:43:25PM -0500, Alan Stern wrote:
On Mon, 10 Dec 2012, Sarah Sharp wrote:
Do you think we will ever need to do the mapping in the other
direction?
Meaning the xHCI driver would need to know which ACPI method was
attached
On 2012年12月11日 01:59, Sarah Sharp wrote:
On Mon, Dec 10, 2012 at 11:29:38AM -0500, Alan Stern wrote:
On Mon, 10 Dec 2012, Lan Tianyu wrote:
Hi AlanGreg:
We meet a problem that bind usb3.0 port(supper-speed port) with ACPI.
The main problem is that the port index num of ss port in the usb
On 2012年12月07日 23:22, Alan Stern wrote:
On Fri, 7 Dec 2012, Lan Tianyu wrote:
Maybe you really need two flags. Do whatever is best; I'm sure you can
figure out a good scheme.
Yeah. Two flags maybe good. In this situation, it should be call
power_is_on, right? power_is_on can be used
On 2012年11月29日 03:37, Alan Stern wrote:
On Sat, 17 Nov 2012, Lan Tianyu wrote:
This patch is to add usb port auto power off mechanism.
When usb device is suspending, usb core will suspend usb port and
usb port runtime pm callback will clear PORT_POWER feature to
power off port if all
On 2012年12月05日 23:58, Alan Stern wrote:
On Wed, 5 Dec 2012, Lan Tianyu wrote:
Hi Alan:
how about following patch?
Index: usb/drivers/usb/core/hub.c
===
--- usb.orig/drivers/usb/core/hub.c
+++ usb/drivers/usb/core/hub.c
On 2012年11月29日 08:08, Alan Stern wrote:
On Wed, 28 Nov 2012, Sarah Sharp wrote:
The shared code to overwrite the bits should probably print a warning if
the host and ACPI bits differ.
I'm not so sure about that. For one thing, who wants warnings to be
logged every time they run lsusb -v?
2012/11/30 Alan Stern st...@rowland.harvard.edu:
On Fri, 30 Nov 2012, Lan Tianyu wrote:
On 2012年11月29日 01:44, Alan Stern wrote:
On Sat, 17 Nov 2012, Lan Tianyu wrote:
This patch is to expose usb port's pm qos flags(pm_qos_no_power_off,
pm_qos_remote_wakeup) to user space. User can set
On 2012年11月29日 01:44, Alan Stern wrote:
On Sat, 17 Nov 2012, Lan Tianyu wrote:
This patch is to expose usb port's pm qos flags(pm_qos_no_power_off,
pm_qos_remote_wakeup) to user space. User can set pm_qos_no_power_off
flag to prohibit the port from being power off.
Do we really need
On 2012年11月29日 03:42, Alan Stern wrote:
On Sat, 17 Nov 2012, Lan Tianyu wrote:
Some usb devices can't be resumed correctly after power off. This
patch is to add pm qos flags request to change NO_POWER_OFF and
provide usb_device_allow_power_off() for device drivers to allow or
prohibit usb
On 2012年11月29日 01:27, Alan Stern wrote:
On Tue, 27 Nov 2012, Sarah Sharp wrote:
Hi Alan,
Could you take a look at this patchset since you asked Tianyu to
refactor the hub code into new files?
Yes, sorry. I've been busy.
Oh. Never mind. Great thanks for your review.:)
Tianyu, I think
Hi Greg:
The patchset is based on the pm qos flags patches which are on the
linux-pm pm-qos branch
http://git.kernel.org/?p=linux/kernel/git/rafael/linux-pm.git;a=shortlog;h=refs/heads/pm-qos
So before merge this patchset, Please pull linux-pm pm-qos branch firstly.
Thanks.
git
isn't created and usb port is not bound with acpi. So first
hub descriptor request is not changed based on ACPI information. After usb
port device being created, set hub port's DeviceRemovable according ACPI
information and this also works for non-root hub.
Signed-off-by: Lan Tianyu tianyu
To show the relationship between usb port and child device,
add link file port under usb device's sysfs directoy and
device under usb port device's sysfs directory. They are linked
to each other.
Signed-off-by: Lan Tianyu tianyu@intel.com
---
drivers/usb/core/hub.c | 26
Some platforms provide usb port connect types through ACPI. This
patch is to add this new attribute to expose these information
to user space.
Signed-off-by: Lan Tianyu tianyu@intel.com
---
Documentation/ABI/testing/sysfs-bus-usb |9 +++
drivers/usb/core/hub.c | 43
This patch is to register usb port's acpi power resources. Create
link between usb port device and its acpi power resource.
Signed-off-by: Lan Tianyu tianyu@intel.com
---
drivers/usb/core/hub.c |4
drivers/usb/core/usb-acpi.c | 20
drivers/usb/core/usb.h
This patch is to create driver/usb/core/(port.c,hub.h) files and move usb
port related code into port.c.
Signed-off-by: Lan Tianyu tianyu@intel.com
---
drivers/usb/core/Makefile |1 +
drivers/usb/core/hub.c| 174 +
drivers/usb/core/hub.h
This patch is to expose usb port's pm qos flags(pm_qos_no_power_off,
pm_qos_remote_wakeup) to user space. User can set pm_qos_no_power_off
flag to prohibit the port from being power off.
Signed-off-by: Lan Tianyu tianyu@intel.com
---
drivers/usb/core/port.c |9 +++--
1 file changed
Signed-off-by: Lan Tianyu tianyu@intel.com
---
drivers/usb/core/hub.c | 36
drivers/usb/core/hub.h |2 ++
drivers/usb/core/port.c | 11 +++
include/linux/usb.h |1 +
4 files changed, 50 insertions(+)
diff --git a/drivers/usb/core
it is active.
Acked-by: Rafael J. Wysocki rafael.j.wyso...@intel.com
Signed-off-by: Lan Tianyu tianyu@intel.com
---
drivers/usb/core/hub.c | 20
drivers/usb/core/hub.h |5 +
drivers/usb/core/port.c | 43 +++
3 files changed, 68
clear and persist
enable. When device is suspended and power off, usb core
will ignore port's connect and enable change event to keep the device
not being disconnected. When it resumes, power on port again.
Acked-by: Rafael J. Wysocki rafael.j.wyso...@intel.com
Signed-off-by: Lan Tianyu tianyu
On 2012年11月15日 04:12, Greg KH wrote:
On Tue, Nov 13, 2012 at 04:07:17PM +0800, Lan Tianyu wrote:
+for (i = 1; i = ports; i++) {
+if (usb_get_hub_port_connect_type(
+ehci_to_hcd(ehci)-self.root_hub, i
于 2012/11/14 17:49, Rafael J. Wysocki 写道:
On Wednesday, November 14, 2012 02:34:37 PM Lan Tianyu wrote:
On 2012年11月14日 08:08, Rafael J. Wysocki wrote:
On Tuesday, November 13, 2012 04:00:02 PM Lan Tianyu wrote:
This patch is to add runtime pm callback for usb port device.
Set/clear PORT_POWER
于 2012/11/14 20:45, Lan Tianyu 写道:
于 2012/11/14 17:49, Rafael J. Wysocki 写道:
On Wednesday, November 14, 2012 02:34:37 PM Lan Tianyu wrote:
On 2012年11月14日 08:08, Rafael J. Wysocki wrote:
On Tuesday, November 13, 2012 04:00:02 PM Lan Tianyu wrote:
This patch is to add runtime pm callback
于 2012/11/14 20:45, Lan Tianyu 写道:
于 2012/11/14 17:49, Rafael J. Wysocki 写道:
On Wednesday, November 14, 2012 02:34:37 PM Lan Tianyu wrote:
On 2012年11月14日 08:08, Rafael J. Wysocki wrote:
On Tuesday, November 13, 2012 04:00:02 PM Lan Tianyu wrote:
This patch is to add runtime pm callback
Change Since v1:
(1) Add driver/usb/core/port.c file and move usb port related code
into new file.
(2) Modify usb port's runtime pm callback and set/clear PORT_POWER
feature in the resume/suspend callback.
(3) Power off port through suspend port device instead of setting/
This patch is to register usb port's acpi power resources. Create
link between usb port device and its acpi power resource.
Signed-off-by: Lan Tianyu tianyu@intel.com
---
drivers/usb/core/hub.c |4
drivers/usb/core/usb-acpi.c | 22 ++
drivers/usb/core
This patch is to create driver/usb/core/port.c and move usb port related
code into it.
Signed-off-by: Lan Tianyu tianyu@intel.com
---
drivers/usb/core/Makefile |1 +
drivers/usb/core/hub.c| 113 +++--
drivers/usb/core/port.c | 82
This patch is to add runtime pm callback for usb port device.
Set/clear PORT_POWER feature in the resume/suspend callbak.
Add portnum for struct usb_port to record port number.
Signed-off-by: Lan Tianyu tianyu@intel.com
---
drivers/usb/core/hub.c | 14 ++
drivers/usb/core
clear and persist
enable. When device is suspended and power off, usb core
will ignore port's connect and enable change event to keep the device
not being disconnected. When it resumes, power on port again.
Signed-off-by: Lan Tianyu tianyu@intel.com
---
drivers/usb/core/hub.c | 76
Change since v1:
[PATCH 3] Rename link file's name child to device, add check of
return value of
sysfs_create_link() and handle error return value properly.
Change since v2:
[PATCH 1] fix a logic backward problem. Add changelog about change ehci
root hub descriptors based on ACPI
isn't created and usb port is not bound with acpi. So first
hub descriptor request is not changed based on ACPI information. After usb
port device being created, set hub port's DeviceRemovable according ACPI
information and this also works for non-root hub.
Signed-off-by: Lan Tianyu tianyu
-by: Lan Tianyu tianyu@intel.com
---
drivers/usb/host/xhci-hub.c | 19 +--
1 file changed, 17 insertions(+), 2 deletions(-)
diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c
index a686cf4..50a3c39 100644
--- a/drivers/usb/host/xhci-hub.c
+++ b/drivers/usb
Some platforms provide usb port connect types through ACPI. This
patch is to add this new attribute to expose these information
to user space.
Signed-off-by: Lan Tianyu tianyu@intel.com
---
Documentation/ABI/testing/sysfs-bus-usb |9 +++
drivers/usb/core/hub.c | 43
To show the relationship between usb port and child device,
add link file port under usb device's sysfs directoy and
device under usb port device's sysfs directory. They are linked
to each other.
Signed-off-by: Lan Tianyu tianyu@intel.com
---
drivers/usb/core/hub.c | 26
于 2012/11/13 19:07, Sergei Shtylyov 写道:
Hello.
On 13-11-2012 12:00, Lan Tianyu wrote:
This patch is to register usb port's acpi power resources. Create
link between usb port device and its acpi power resource.
Signed-off-by: Lan Tianyu tianyu@intel.com
[...]
diff --git a/drivers/usb
On 2012年11月14日 07:56, Rafael J. Wysocki wrote:
On Tuesday, November 13, 2012 08:36:15 PM Lan Tianyu wrote:
于 2012/11/13 19:07, Sergei Shtylyov 写道:
Hello.
On 13-11-2012 12:00, Lan Tianyu wrote:
This patch is to register usb port's acpi power resources. Create
link between usb port device
On 2012年11月14日 08:04, Rafael J. Wysocki wrote:
On Tuesday, November 13, 2012 04:00:01 PM Lan Tianyu wrote:
This patch is to create driver/usb/core/port.c and move usb port related
code into it.
It does seem to make functional changes in addition to that, however.
No functional change
On 2012年11月14日 08:08, Rafael J. Wysocki wrote:
On Tuesday, November 13, 2012 04:00:02 PM Lan Tianyu wrote:
This patch is to add runtime pm callback for usb port device.
Set/clear PORT_POWER feature in the resume/suspend callbak.
Add portnum for struct usb_port to record port number.
Signed
On 2012年11月12日 10:43, Alan Stern wrote:
On Mon, 12 Nov 2012, Lan Tianyu wrote:
This will consume more power than suspend it
agian.
No it won't, because the device will suspend itself after 3 ms.
But the premise is they see a constant Idle state on their upstream
facing bus lines
On 2012/11/10 0:10, Alan Stern wrote:
On Fri, 9 Nov 2012, Lan Tianyu wrote:
Some usb devices can't be resumed correctly after power off. This
patch is to add pm qos flags request to change NO_POWER_OFF and
provide usb_device_allow_power_off() for device drivers to allow or
prohibit usb core
On 2012年11月11日 23:55, Alan Stern wrote:
On Sun, 11 Nov 2012, Lan Tianyu wrote:
On 2012/11/10 0:10, Alan Stern wrote:
On Fri, 9 Nov 2012, Lan Tianyu wrote:
Some usb devices can't be resumed correctly after power off. This
patch is to add pm qos flags request to change NO_POWER_OFF
On 2012年11月11日 23:46, Alan Stern wrote:
On Sun, 11 Nov 2012, Lan Tianyu wrote:
Hi Alan:
Great thanks for your review and good suggestions.
I think the main problem is that when the port device resumed(you said
turn on/off power in the port's runtime callback ) and device powered
On 2012年11月12日 10:41, Alan Stern wrote:
On Mon, 12 Nov 2012, Lan Tianyu wrote:
I think port and device are bound. Power off port also means to power
off device. So prevent device from power off also means to prevent port
from power off. They just like a power domain. Because power
The patchset is based on the pm qos flags patches and now on
the linux-pm's next tree and pm-qos.
http://git.kernel.org/?p=linux/kernel/git/rafael/linux-pm.git;a=shortlog;h=refs/heads/pm-qos
usb: add usb port's pm qos flags request to change NO_POWER_OFF flag
usb: add runtime pm support for usb
This patch is to register usb port's acpi power resources. Create
link between usb port device and its acpi power resource.
Signed-off-by: Lan Tianyu tianyu@intel.com
---
drivers/usb/core/hub.c |3 ++-
drivers/usb/core/usb-acpi.c | 23 +++
drivers/usb/core
is suspended and power off, usb core
will ignore port's connect and enable change event to keep the device
not being disconnected. When it resumes, power on port again.
Signed-off-by: Lan Tianyu tianyu@intel.com
---
drivers/usb/core/hub.c | 78 ++--
1
This patch is to expose usb port's pm qos flags(pm_qos_no_power_off,
pm_qos_remote_wakeup) to user space. The pm_qos_no_power_off will
be used to control usb port auto power off mechanism from user space.
Signed-off-by: Lan Tianyu tianyu@intel.com
---
drivers/usb/core/hub.c |9
Some usb devices can't be resumed correctly after power off. This
patch is to add pm qos flags request to change NO_POWER_OFF and
provide usb_device_allow_power_off() for device drivers to allow or
prohibit usb core to power off the device.
Signed-off-by: Lan Tianyu tianyu@intel.com
will be resumed and suspended.
Signed-off-by: Lan Tianyu tianyu@intel.com
---
drivers/usb/core/hub.c | 48
1 file changed, 48 insertions(+)
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index f0e1b29..3ba6a96 100644
--- a/drivers/usb
Change since v1:
[PATCH 3] Rename link file's name child to device, add check of
return value of
sysfs_create_link() and handle error return value properly.
Change since v2:
[PATCH 1] fix a logic backward problem. Add changelog about change ehci
root hub descriptors based on ACPI
isn't created and usb port is not bound with acpi. So first
hub descriptor request is not changed based on ACPI information. After usb
port device being created, set hub port's DeviceRemovable according ACPI
information and this also works for non-root hub.
Signed-off-by: Lan Tianyu tianyu
-by: Lan Tianyu tianyu@intel.com
---
drivers/usb/host/xhci-hub.c | 19 +--
1 file changed, 17 insertions(+), 2 deletions(-)
diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c
index a686cf4..50a3c39 100644
--- a/drivers/usb/host/xhci-hub.c
+++ b/drivers/usb
To show the relationship between usb port and child device,
add link file port under usb device's sysfs directoy and
device under usb port device's sysfs directory. They are linked
to each other.
Signed-off-by: Lan Tianyu tianyu@intel.com
---
drivers/usb/core/hub.c | 26
Some platforms provide usb port connect types through ACPI. This
patch is to add this new attribute to expose these information
to user space.
Signed-off-by: Lan Tianyu tianyu@intel.com
---
Documentation/ABI/testing/sysfs-bus-usb |9 +++
drivers/usb/core/hub.c | 43
Hi Alan:
Thanks for your review. I will update soon.
Best Regards
Tianyu Lan
-Original Message-
From: Alan Stern [mailto:st...@rowland.harvard.edu]
Sent: Monday, November 05, 2012 10:55 PM
To: Lan, Tianyu
Cc: gre...@linuxfoundation.org; sarah.a.sh...@linux.intel.com
isn't created and usb port is not bound with acpi. So first
hub descriptor request is not changed based on ACPI information. After usb
port device being created, set hub port's DeviceRemovable according ACPI
information and this also works for non-root hub.
Signed-off-by: Lan Tianyu tianyu
To show the relationship between usb port and child device,
add link file port under usb device's sysfs directoy and
device under usb port device's sysfs directory. They are linked
to each other.
Signed-off-by: Lan Tianyu tianyu@intel.com
---
drivers/usb/core/hub.c | 22
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