[edk2-devel] [PATCH v3 7/7] Platform/RaspberryPi: Add Linux quirk support

[Andrei Warkentin]

Reviewed-by: Andrei Warkentin <awarkentin at vmware.com>
________________________________
From: Jeremy Linton <jeremy.linton at arm.com>
Sent: Thursday, August 19, 2021 11:16 PM
To: devel at edk2.groups.io <devel at edk2.groups.io>
Cc: pete at akeo.ie <pete at akeo.ie>; ardb+tianocore at kernel.org <ardb+tianocore at kernel.org>; Andrei Warkentin <awarkentin at vmware.com>; Sunny.Wang at arm.com <Sunny.Wang at arm.com>; samer.el-haj-mahmoud at arm.com <samer.el-haj-mahmoud at arm.com>; Jeremy Linton <jeremy.linton at arm.com>
Subject: [PATCH v3 7/7] Platform/RaspberryPi: Add Linux quirk support

Linux, for the time being has refused to support the Arm
standard SMCCC for PCIe configuration. Instead they
want to continue to maintain per device "quirks".

As the RPI isn't really ECAM this is a bit more
involved because the MCFG can't really describe
the root port+config registers situation. Further
platforms which support the SMCCC shouldn't have
a MCFG, so we need an additional way to tell linux
what it needs to know about this platform.

Signed-off-by: Jeremy Linton <jeremy.linton at arm.com>
---
 Platform/RaspberryPi/AcpiTables/Pci.asl | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Platform/RaspberryPi/AcpiTables/Pci.asl b/Platform/RaspberryPi/AcpiTables/Pci.asl
index dc2bd7bc9e..50fe2cbdf2 100644
--- a/Platform/RaspberryPi/AcpiTables/Pci.asl
+++ b/Platform/RaspberryPi/AcpiTables/Pci.asl
@@ -62,6 +62,13 @@ DefinitionBlock (__FILE__, "SSDT", 5, "RPIFDN", "RPI4PCIE", 2)
         Package (4) { 0x0000FFFF, 3, zero, 178 }
       })

+      Name (_DSD, Package () {
+        ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
+          Package () {
+            Package () { "linux-ecam-quirk-id", "bcm2711" },
+          }
+      })
+
       // Root complex resources
       Method (_CRS, 0, Serialized) {
         Name (RBUF, ResourceTemplate () {
--
2.13.7



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