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I don't know... the ACPI spec is weird.</div>
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<a href="https://uefi.org/specs/ACPI/6.4/06_Device_Configuration/Device_Configuration.html#dma-direct-memory-access" id="LPlnk">https://uefi.org/specs/ACPI/6.4/06_Device_Configuration/Device_Configuration.html#dma-direct-memory-access</a><br>
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...lists ResourceConsumer for _DMA.</div>
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A</div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Jeremy Linton <jeremy.linton@arm.com><br>
<b>Sent:</b> Thursday, April 8, 2021 12:58 AM<br>
<b>To:</b> devel@edk2.groups.io <devel@edk2.groups.io><br>
<b>Cc:</b> ard.biesheuvel@arm.com <ard.biesheuvel@arm.com>; leif@nuviainc.com <leif@nuviainc.com>; pete@akeo.ie <pete@akeo.ie>; samer.el-haj-mahmoud@arm.com <samer.el-haj-mahmoud@arm.com>; Andrei Warkentin <awarkentin@vmware.com>; Jeremy Linton <jeremy.linton@arm.com><br>
<b>Subject:</b> [PATCH 3/3] Platform/RaspberryPi/AcpiTables: Correct _DMA consumer</font>
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<div class="PlainText">Bridge devices should be marked as producers so that their<br>
children can consume the resources. In linux if this isn't<br>
true then the translation gets ignored and the DMA values<br>
are incorrect. This fixes DMA on all the devices that<br>
need a translation.<br>
<br>
Signed-off-by: Jeremy Linton <jeremy.linton@arm.com><br>
---<br>
Platform/RaspberryPi/AcpiTables/Dsdt.asl | 2 +-<br>
Platform/RaspberryPi/AcpiTables/Emmc.asl | 2 +-<br>
2 files changed, 2 insertions(+), 2 deletions(-)<br>
<br>
diff --git a/Platform/RaspberryPi/AcpiTables/Dsdt.asl b/Platform/RaspberryPi/AcpiTables/Dsdt.asl<br>
index d116f965e1..32cd5fc9f9 100644<br>
--- a/Platform/RaspberryPi/AcpiTables/Dsdt.asl<br>
+++ b/Platform/RaspberryPi/AcpiTables/Dsdt.asl<br>
@@ -205,7 +205,7 @@ DefinitionBlock ("Dsdt.aml", "DSDT", 5, "RPIFDN", "RPI", 2)<br>
// Only the first GB is available.<br>
<br>
// Bus 0xC0000000 -> CPU 0x00000000.<br>
<br>
//<br>
<br>
- QWordMemory (ResourceConsumer,<br>
<br>
+ QWordMemory (ResourceProducer,<br>
<br>
,<br>
<br>
MinFixed,<br>
<br>
MaxFixed,<br>
<br>
diff --git a/Platform/RaspberryPi/AcpiTables/Emmc.asl b/Platform/RaspberryPi/AcpiTables/Emmc.asl<br>
index 179dd3ecdb..0fbc2a79ea 100644<br>
--- a/Platform/RaspberryPi/AcpiTables/Emmc.asl<br>
+++ b/Platform/RaspberryPi/AcpiTables/Emmc.asl<br>
@@ -32,7 +32,7 @@ DefinitionBlock (__FILE__, "SSDT", 5, "RPIFDN", "RPI4EMMC", 2)<br>
}<br>
<br>
<br>
<br>
Name (_DMA, ResourceTemplate() {<br>
<br>
- QWordMemory (ResourceConsumer,<br>
<br>
+ QWordMemory (ResourceProducer,<br>
<br>
,<br>
<br>
MinFixed,<br>
<br>
MaxFixed,<br>
<br>
-- <br>
2.13.7<br>
<br>
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