Douglas Anderson 17dd5b642d usb: dwc2: host: Add a delay before releasing periodic bandwidth ... We'd like to be able to use HCD_BH in order to speed up the dwc2 host interrupt handler quite a bit. However, according to the kernel doc for usb_submit_urb() (specifically the part about "Reserved Bandwidth Transfers"), we need to keep a reservation active as long as a device driver keeps submitting. That was easy to do when we gave back the URB in the interrupt context: we just looked at when our queue was empty and released the reserved bandwidth then. ...but now we need a little more complexity. We'll follow EHCI's lead in commit 9118f9eb4f ("USB: EHCI: improve interrupt qh unlink") and add a 5ms delay. Since we don't have a whole timer infrastructure in dwc2, we'll just add a timer per QH. The overhead for this is very small. Note that the dwc2 scheduler is pretty broken (see future patches to fix it). This patch attempts to replicate all old behavior and just add the proper delay. Acked-by: John Youn <johnyoun@synopsys.com> Signed-off-by: Douglas Anderson <dianders@chromium.org> Tested-by: Heiko Stuebner <heiko@sntech.de> Tested-by: Stefan Wahren <stefan.wahren@i2se.com> Signed-off-by: Felipe Balbi <balbi@kernel.org>		2016-03-04 15:14:41 +02:00
..
core_intr.c	usb: dwc2: host: Clear interrupts before handling them	2015-12-15 09:12:41 -06:00
core.c	usb: dwc2: host: fix split transfer schedule sequence	2016-03-04 15:14:40 +02:00
core.h	usb: dwc2: host: Add scheduler tracing	2016-03-04 15:14:41 +02:00
debug.h	usb: dwc2: move debugfs code to a separate file	2015-04-29 15:18:25 -05:00
debugfs.c	usb: dwc2: Use platform endianness when accessing registers	2015-09-27 10:54:31 -05:00
gadget.c	usb: dwc2: gadget: Repair DSTS register decoding	2015-12-22 12:03:05 -06:00
hcd_ddma.c	usb: dwc2: host: Always add to the tail of queues	2016-03-04 15:14:40 +02:00
hcd_intr.c	usb: dwc2: host: Add scheduler tracing	2016-03-04 15:14:41 +02:00
hcd_queue.c	usb: dwc2: host: Add a delay before releasing periodic bandwidth	2016-03-04 15:14:41 +02:00
hcd.c	usb: dwc2: host: fix split transfer schedule sequence	2016-03-04 15:14:40 +02:00
hcd.h	usb: dwc2: host: Add a delay before releasing periodic bandwidth	2016-03-04 15:14:41 +02:00
hw.h	usb: dwc2: host: fix descriptor list address masking	2015-12-15 09:12:41 -06:00
Kconfig	usb: dwc2: USB_DWC2 should depend on HAS_DMA	2016-02-20 20:23:02 -08:00
Makefile	usb: dwc2: remove dwc2_platform.ko	2015-04-29 15:20:11 -05:00
pci.c	usb: dwc2: pci: Add device mode to the dwc2-pci driver	2015-03-11 15:08:17 -05:00
platform.c	usb: dwc2: host: Set host_rx_fifo_size to 525 for rk3066	2016-03-04 15:14:39 +02:00