config SND_BCM2835_SOC_I2S
tristate "SoC Audio support for the Broadcom BCM2835 I2S module"
depends on ARCH_BCM2835 || COMPILE_TEST
select SND_SOC_GENERIC_DMAENGINE_PCM
select REGMAP_MMIO
help
Say Y or M if you want to add support for codecs attached to
the BCM2835 I2S interface. You will also need
to select the audio interfaces to support below.
config SND_SOC_CYGNUS
tristate "SoC platform audio for Broadcom Cygnus chips"
depends on ARCH_BCM_CYGNUS || COMPILE_TEST
depends on HAS_DMA
help
Say Y if you want to add support for ASoC audio on Broadcom
Cygnus chips (bcm958300, bcm958305, bcm911360)
If you don't know what to do here, say N.'>
index : net-next.git | |
| net-next plumbings | Tobias Klauser |
dmaengine: cppi41: Fix runtime PM timeouts with USB mass storage
Commit fdea2d09b997 ("dmaengine: cppi41: Add basic PM runtime support")
added runtime PM support for cppi41, but had corner case issues. Some of
the issues were fixed with commit 098de42ad670 ("dmaengine: cppi41: Fix
unpaired pm runtime when only a USB hub is connected"). That fix however
caused a new regression where we can get error -115 messages with USB on
BeagleBone when connecting a USB mass storage device to a hub.
This is because when connecting a USB mass storage device to a hub, the
initial DMA transfers can take over 200ms to complete and cppi41
autosuspend delay times out.
To fix the issue, we want to implement refcounting for chan_busy array
that contains the active dma transfers. Increasing the autosuspend delay
won't help as that the delay could be potentially seconds, and it's best
to let the USB subsystem to deal with the timeouts on errors.
The earlier attempt for runtime PM was buggy as the pm_runtime_get/put()
calls could get unpaired easily as they did not follow the state of
the chan_busy array as described in commit 098de42ad670 ("dmaengine:
cppi41: Fix unpaired pm runtime when only a USB hub is connected".
Let's fix the issue by adding pm_runtime_get() to where a new transfer
is added to the chan_busy array, and calls to pm_runtime_put() where
chan_busy array entry is cleared. This prevents any autosuspend timeouts
from happening while dma transfers are active.
Fixes: 098de42ad670 ("dmaengine: cppi41: Fix unpaired pm runtime when
only a USB hub is connected")
Fixes: fdea2d09b997 ("dmaengine: cppi41: Add basic PM runtime support")
Cc: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: Bin Liu <b-liu@ti.com>
Cc: Grygorii Strashko <grygorii.strashko@ti.com>
Cc: Kevin Hilman <khilman@baylibre.com>
Cc: Patrick Titiano <ptitiano@baylibre.com>
Cc: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Tested-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>