[Feature] Haswell-ULT UART DMA support
Bug #1031162 reported by
Yingying Zhao
This bug affects 1 person
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
intel |
Fix Released
|
Undecided
|
Unassigned | ||
linux (Ubuntu) |
Fix Released
|
Undecided
|
Tim Gardner | ||
Raring |
Fix Released
|
Undecided
|
Tim Gardner |
Bug Description
UART DMA support is needed to achieve higher baud rates that are required by the bluetooth module that is connected to the UART. The UART block is Synopsys Designware HS-UART, and it has it's RXRDY and TXRDY signals connected to the Synopsys Designware DMA controller (DW_ahb_dmac) also available on Haswell-ULT. The UART is 16550 compatible.
Upstream Schedule:
WW02'2013
Related branches
CVE References
tags: | added: haswell-ult |
Changed in linux (Ubuntu Raring): | |
assignee: | nobody → Tim Gardner (timg-tpi) |
status: | New → Fix Committed |
information type: | Private → Public |
Changed in intel: | |
status: | Fix Committed → Fix Released |
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The code is included in kernel v3.9:
7277b2a serial: 8250_dw: Enable DMA support with ACPI
9ee4b83 serial: 8250: Add support for dmaengine