On Wednesday, November 05, 2014 06:34:44 PM Andy Shevchenko wrote: > The Intel BayTrail based machines have different configuration of the Low Power > Sub System (LPSS) IP. The LPSS contains few host controllers, such as I2C, SPI, > I2C and common DMA IP to serve DMA transfers. Unfortunately the DMA IP has no > power control accessible for software / OS. It goes automatically down whenever > last device goes to sleep and turned on when one of them is turned on. When > user tries to access the powered off DMA device the system hangs. > > This patch series addressing the issue. Rafael suggested to create a 'proxy' > device which makes DMA to be powered on on the certain points of time. > > Vinod, we would like to push this via Rafael's tree, so, please Ack or NAck the > patch 4/4. > > Scott, do you have a chance to test this patch series against last linux-pm > tree on HP laptops? I would appreciate your Tested-by tag. > > Andy Shevchenko (4): > ACPI / LPSS: add all LPSS devices to the specific power domain > ACPI / LPSS: allow to use specific PM domain during ->probe() > ACPI / LPSS: introduce a 'proxy' device to power on LPSS for DMA > dmaengine: dw: enable runtime PM > > drivers/acpi/acpi_lpss.c | 94 +++++++++++++++++++++++++++++++++--------------- > drivers/dma/dw/core.c | 11 ++++++ > 2 files changed, 76 insertions(+), 29 deletions(-) I've queued up the series for 3.19, thanks! -- I speak only for myself. Rafael J. Wysocki, Intel Open Source Technology Center. -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
