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authorRobert Chen <robert.chen@quanta.corp-partner.google.com>2024-11-05 21:00:20 -0500
committerKarthik Ramasubramanian <kramasub@google.com>2024-11-08 01:03:02 +0000
commit8d3f419cbc345884aedd7a2f9c1b5bcf378dcefd (patch)
tree4def03c3fd8ab586a9b0c670e2cedff21b40ac23 /src/mainboard/google/dedede/variants/drawcia
parent0714d5cc8a6c7a8bad4f0a3e605e3a576f32502e (diff)
mb/google/dedede/var/drawcia: Enable LTR mechanism for PCIe root port 8
Realtek AX generation IC utilizes LTR-issued latency requests to optimize WiFi latency and power consumption, it requires host enabling LTR to meet the design requirement. We enabled the host's LTR by enabling PCIe root port 8, which met resltek's technical requirements. BUG=b:377400590 TEST=Tested on Drawman with RTL8852BE Use command $ lspci -vv, LTR+ is listed on DevCtl2 BRANCH=firmware-dedede-13606.B Signed-off-by: Robert Chen <robert.chen@quanta.corp-partner.google.com> Change-Id: I093951f71e971fe83d61d9fcda8bf16cc5f82ffe Reviewed-on: https://review.coreboot.org/c/coreboot/+/85011 Reviewed-by: Karthik Ramasubramanian <kramasub@google.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/mainboard/google/dedede/variants/drawcia')
-rw-r--r--src/mainboard/google/dedede/variants/drawcia/overridetree.cb3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/mainboard/google/dedede/variants/drawcia/overridetree.cb b/src/mainboard/google/dedede/variants/drawcia/overridetree.cb
index 67c9262007..6c745d9f97 100644
--- a/src/mainboard/google/dedede/variants/drawcia/overridetree.cb
+++ b/src/mainboard/google/dedede/variants/drawcia/overridetree.cb
@@ -7,6 +7,9 @@ fw_config
end
chip soc/intel/jasperlake
+ # PCIe RP LTR configuration
+ register "PcieRpLtrEnable[7]" = "1"
+
# USB Port Configuration
register "usb2_ports[5]" = "USB2_PORT_MID(OC_SKIP)" # Camera