On Fri, 2014-11-07 at 01:37 +0100, Rafael J. Wysocki wrote: > 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 > > I'm essentially fine with this series, but I'm not sure what the status of > the Scott's testing is. Can you please tell me and Scott what in particular > you wanted him to test? He complained that HP laptop didn't reboot nicely and hangs the system until he blacklisted dw_dmac driver. -- Andy Shevchenko <andriy.shevchenko@xxxxxxxxx> Intel Finland Oy -- 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
