ignore invalid AccessType if RegionType only allows for one AccessType?

ignore invalid AccessType if RegionType only allows for one AccessType?

[Dominik Brodowski]

Hi!

The DSDTs of many Samsung notebooks contain one bug which forces users to
use a "DSDT override":

                    OperationRegion (ECR, EmbeddedControl, 0x00, 0xFF)
                    Field (ECR, DWordAcc, Lock, Preserve)


As can be seen in table 15-6 of ACPI spec 1.0b and in table 16-6 of ACPI 
spec 2.0, TypeRegion EmbeddedControl only allows for "ByteAcc", not 
"DWordAcc". iasl also says the same:

../dsdt.dsl  2660:                     Field (ECR, DWordAcc, Lock, Preserve)
Error    1048 -                                 ^ Host Operation Region requires ByteAcc access

Given the fact that EmbeddedControl _only_ allows ByteAcc, how about
"ignoring" DWordAcc or any other (invalid) AccType in this case if
!acpi_strict, and "assuming" a value of ByteAcc instead?

Thanks,
	Dominik


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Re: ignore invalid AccessType if RegionType only allows for one AccessType?

[Andrew Barr]

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Interesting. I have a Dell 300m that has that same problem.

Andrew

P.S. forgot to CC the list. Sorry. :(

=====================
When in doubt, do what the President does -- guess.
=====================

On Monday, July 19, 2004, 4:53:29 AM, Dominik Brodowski <linux@dominikbrodowski.de> wrote:

> Hi!

> The DSDTs of many Samsung notebooks contain one bug which forces users to
> use a "DSDT override":

>                     OperationRegion (ECR, EmbeddedControl, 0x00, 0xFF)
>                     Field (ECR, DWordAcc, Lock, Preserve)


> As can be seen in table 15-6 of ACPI spec 1.0b and in table 16-6 of ACPI
> spec 2.0, TypeRegion EmbeddedControl only allows for "ByteAcc", not
> "DWordAcc". iasl also says the same:

> ../dsdt.dsl  2660:                     Field (ECR, DWordAcc, Lock, Preserve)
> Error    1048 -                                 ^ Host Operation Region requires ByteAcc access

> Given the fact that EmbeddedControl _only_ allows ByteAcc, how about
> "ignoring" DWordAcc or any other (invalid) AccType in this case if
> !acpi_strict, and "assuming" a value of ByteAcc instead?

> Thanks,
> 	Dominik

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