bbswitch-g14

105 Commits 6 Branches 9 Tags

3 Commits

Author	SHA1	Message	Date
Peter Wu	fd774b1f5e	bbswitch_dev: remove artificial delays These delays were added as attempt to rule out the possibility that the hardware was accessed too fast, but it does not seem to help. Remove it.	2016-05-23 19:49:21 +02:00
Peter Wu	daa6411911	[DO NOT MERGE] [WIP] Add PCI driver This is work in progress, I intend to merge the bbswitch_dev code into the main module. Some comments in README and bbswitch.c might be stale. Create a PCI driver such that runtime PM works. Without a bound driver, the kernel assumes that the device is D0 state during suspend (which therefore needs the notifier hack in bbswitch) but more importantly, it will prevent the PCIe port from going to sleep in Linux v4.7. Currently I use this to debug an infinite loop on my Clevo P651RA laptop, it can be loaded as follows: make modname=bbswitch_dev insmod bbswitch_dev.ko echo > /sys/bus/pci/drivers/bbswitch/new_id 10de 13d9 Needs Mika's pci/pm series ("PCI: Put PCIe ports into D3 during suspend"), qeued for v4.7 via https://git.kernel.org/cgit/linux/kernel/git/helgaas/pci.git/commit/?h=pci/pm	2016-05-19 15:54:23 +02:00
Peter Wu	915413ab92	Disable DSM if power resources are in use The Optimus _DSM function would prepare a device to be put in D3cold state when _PS3 is called. Newer laptops should not use this since Windows 8 introduced a new method to put devices in D3cold state[1]. Hopefully this fixes an infinite loop on a Clevo P651RA. Actually putting the parent device (PCIe port) is not done in this patch. [1]: https://msdn.microsoft.com/windows/hardware/drivers/bringup/firmware-requirements-for-d3cold	2016-05-13 21:35:54 +02:00

Author

SHA1

Message

Date

Peter Wu

fd774b1f5e

bbswitch_dev: remove artificial delays

These delays were added as attempt to rule out the possibility that the
hardware was accessed too fast, but it does not seem to help. Remove it.

2016-05-23 19:49:21 +02:00

Peter Wu

daa6411911

[DO NOT MERGE] [WIP] Add PCI driver

This is work in progress, I intend to merge the bbswitch_dev code into
the main module. Some comments in README and bbswitch.c might be stale.

Create a PCI driver such that runtime PM works. Without a bound driver,
the kernel assumes that the device is D0 state during suspend (which
therefore needs the notifier hack in bbswitch) but more importantly, it
will prevent the PCIe port from going to sleep in Linux v4.7.

Currently I use this to debug an infinite loop on my Clevo P651RA
laptop, it can be loaded as follows:

    make modname=bbswitch_dev
    insmod bbswitch_dev.ko
    echo > /sys/bus/pci/drivers/bbswitch/new_id 10de 13d9

Needs Mika's pci/pm series ("PCI: Put PCIe ports into D3 during
suspend"), qeued for v4.7 via
https://git.kernel.org/cgit/linux/kernel/git/helgaas/pci.git/commit/?h=pci/pm

2016-05-19 15:54:23 +02:00

Peter Wu

915413ab92

Disable DSM if power resources are in use

The Optimus _DSM function would prepare a device to be put in D3cold
state when _PS3 is called. Newer laptops should not use this since
Windows 8 introduced a new method to put devices in D3cold state[1].

Hopefully this fixes an infinite loop on a Clevo P651RA. Actually
putting the parent device (PCIe port) is not done in this patch.

 [1]: https://msdn.microsoft.com/windows/hardware/drivers/bringup/firmware-requirements-for-d3cold

2016-05-13 21:35:54 +02:00