[haiku-bugs] Re: [Haiku] #10505: radeon_hd needs ACPI support for finding the AtomBIOS
- From: "tqh" <trac@xxxxxxxxxxxx>
- Date: Tue, 04 Mar 2014 20:49:29 -0000
#10505: radeon_hd needs ACPI support for finding the AtomBIOS
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Reporter: kallisti5 | Owner: tqh
Type: enhancement | Status: new
Priority: normal | Milestone: R1
Component: Drivers/Graphics/radeon_hd | Version: R1/Development
Resolution: | Keywords:
Blocked By: | Blocking:
Has a Patch: 0 | Platform: All
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Comment (by tqh):
This needs to be done:
* Get ACPI module.
* Find ACPI handle for card.
* Find ATRM function under card.
* Execute ATRM to get BIOS.
If anyone fails fallthrough to next way of getting firmware.
Possibly we need to do like Linux that calls ATRM with offset into bios as
first param and length to read as second. Reading the BIOS is done with
several calls with chunks that are ATRM page size until 256 * 1024 bytes
are read.
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Ticket URL: <https://dev.haiku-os.org/ticket/10505#comment:1>
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