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| author | Bryan O'Donoghue <bryan.odonoghue@intel.com> | 2014-07-02 10:58:18 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-07-10 01:16:07 +0200 |
| commit | 6e693739e9b603b3ca9ce0d4f4178f0633458465 (patch) | |
| tree | 7b2337a073f7484a7f017c4d499ef6aed3935048 /sound | |
| parent | USB: OHCI: don't allocate HCCA atomically (diff) | |
| download | linux-6e693739e9b603b3ca9ce0d4f4178f0633458465.tar.xz linux-6e693739e9b603b3ca9ce0d4f4178f0633458465.zip | |
USB: ehci-pci: USB host controller support for Intel Quark X1000
The EHCI packet buffer in/out threshold is programmable for Intel Quark X1000
USB host controller, and the default value is 0x20 dwords. The in/out threshold
can be programmed to 0x80 dwords (512 Bytes) to maximize the perfomrance,
but only when isochronous/interrupt transactions are not initiated by the USB
host controller. This patch is to reconfigure the packet buffer in/out
threshold as maximal as possible to maximize the performance, and 0x7F dwords
(508 Bytes) should be used because the USB host controller initiates
isochronous/interrupt transactions.
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@intel.com>
Signed-off-by: Alvin (Weike) Chen <alvin.chen@intel.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Reviewed-by: Jingoo Han <jg1.han@samsung.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'sound')
0 files changed, 0 insertions, 0 deletions