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qemu-e2k/hw/usb
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Miguel GAIO a60f39a468 ohci: set effectively usb frame rate to 1kHz 
USB frame rate is slightly lower than 1kHz: ie. ~950Hz.
Thus usb-audio device is not able to perform a simple audio playback
without underruns on audio backend.
eg. "-device pci-ohci,id=ohci -device usb-audio,bus=ohci.0" vs PulseAudio
backend. more than 50 underruns are observed per second.

Update ohci_sof_time computation, using QEMU_CLOCK_VIRTUAL in
ohci_usb_start(), and increment by usb_frame_time in ohci_sof()
makes USB frame rate close to 1kHz.
This way, no audio underrun are observed during audio playback.

Signed-off-by: Miguel GAIO <mgaio35@gmail.com>
Message-Id: <20180927151936.3647-1-mgaio35@gmail.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
 		2018-10-01 10:49:54 +02:00
..
Makefile.objs usb: Add basic code to emulate Chipidea USB IP 2018-02-09 10:40:30 +00:00
bus.c
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ccid-card-emulated.c ccid-card: include libcacard.h only 2018-04-27 10:57:09 +02:00
ccid-card-passthru.c hw/usb: Use the IEC binary prefix definitions 2018-07-02 15:41:16 +02:00
ccid.h usb-ccid: convert CCIDCardClass::exitfn() -> unrealize() 2018-01-26 07:59:33 +01:00
chipidea.c usb: Add basic code to emulate Chipidea USB IP 2018-02-09 10:40:30 +00:00
combined-packet.c hw/usb: Use the IEC binary prefix definitions 2018-07-02 15:41:16 +02:00
core.c
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desc-msos.c usb: use local path for local headers 2018-06-01 19:20:38 +03:00
desc.c usb: use local path for local headers 2018-06-01 19:20:38 +03:00
desc.h
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dev-audio.c usb: use local path for local headers 2018-06-01 19:20:38 +03:00
dev-bluetooth.c usb: use local path for local headers 2018-06-01 19:20:38 +03:00
dev-hid.c usb: use local path for local headers 2018-06-01 19:20:38 +03:00
dev-hub.c usb-hub: clear suspend on detach 2018-10-01 10:49:54 +02:00
dev-mtp.c usb-mtp: reset ObjectInfo dataset size on cleanup 2018-10-01 10:49:54 +02:00
dev-network.c usb: use local path for local headers 2018-06-01 19:20:38 +03:00
dev-serial.c usb: use local path for local headers 2018-06-01 19:20:38 +03:00
dev-smartcard-reader.c hw/usb: Use the IEC binary prefix definitions 2018-07-02 15:41:16 +02:00
dev-storage.c block: Remove deprecated -drive option serial 2018-08-15 12:50:39 +02:00
dev-uas.c Revert "usb: release the created buses" 2018-06-18 09:15:51 +02:00
dev-wacom.c usb: use local path for local headers 2018-06-01 19:20:38 +03:00
hcd-ehci-pci.c
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hcd-ehci-sysbus.c
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hcd-ehci.c ehci: Don't fetch a NULL current qtd but advance the queue instead. 2018-07-03 09:49:44 +02:00
hcd-ehci.h
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hcd-musb.c Replace all occurances of __FUNCTION__ with __func__ 2018-01-22 09:46:18 +01:00
hcd-ohci.c ohci: set effectively usb frame rate to 1kHz 2018-10-01 10:49:54 +02:00
hcd-uhci.c
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hcd-xhci-nec.c
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hcd-xhci.c xhci: fix guest-triggerable assert 2018-07-03 09:50:39 +02:00
hcd-xhci.h
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host-libusb.c usb-host: skip open on pending postload bh 2018-05-07 11:10:42 +02:00
host-stub.c usb: Remove legacy -usbdevice options (host, serial, disk and net) 2018-01-26 07:15:08 +01:00
host.h
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libhw.c
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quirks-ftdi-ids.h
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quirks-pl2303-ids.h
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quirks.c
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quirks.h
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redirect.c hw/usb: Use the IEC binary prefix definitions 2018-07-02 15:41:16 +02:00
trace-events
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tusb6010.c hw/usb/tusb6010: Convert away from old_mmio 2018-05-04 18:05:50 +01:00
xen-usb.c xen: remove other open-coded use of libxengnttab 2018-05-22 11:43:21 -07:00